TECHNICAL FIELD
[0001] The invention relates to an intrusion alarm component comprising a first element,
a second element and a locking device for locking the first element to the second
element, wherein the locking device comprises an axis of rotation and a protrusion
for locking interaction with a projection of the second element, and wherein the locking
device is connected to the first element and is rotatable around the axis of rotation
between an unlocked position and a locked position in which the protrusion of the
locking device engages the projection of the second element.
[0002] Locking devices of this type can be used for a variety of products and for a variety
of purposes. One example is a casing and bracket comprising the first element in the
form of a casing or casing front cover and the second element in the form of the bracket,
such as a wall bracket or similar, wherein the locking device connects the casing
or front cover to the bracket. Alternatively, the second element is a back cover of
the casing. Other examples of the first and second elements may include motor components,
pipes, toy components, tool components or generally any elements that are releasably
fastened to each other by means of the locking device.
[0003] The intrusion alarm component according to the present invention can be an intrusion
alarm system component, such as an intrusion alarm detector or an intrusion alarm
gateway. Such alarm system components are often mounted on a structure, such as a
wall, a door, a window frame, etc., wherein a casing is mounted on a bracket. Such
alarm systems are commonly used in domestic houses and office premises as well as
other buildings as alarm systems to detect unauthorised intrusion such as burglary,
damages and similar.
[0004] The invention relates to a method for indicating when a first element is releasable
from a second element of a device in the form of an intrusion alarm component.
PRIOR ART
[0005] Intrusion alarm components comprising a first element, a second element and a rotatable
locking device for fastening the first element to the second element are known in
the prior art. One type of such prior art device is disclosed in
EP3009810.
[0006] One problem with such prior art devices is that they can be difficult to assemble
and disassemble. One problem with such prior art devices is, e.g. that they may be
damaged if force is applied to remove the first element from the second element when
the locking device is in the locked position. Similarly, damages can occur if the
first element is forced on the second element when the locking device is in the locked
position. Hence, there is a need for such a device, which indicates when the first
element is releasable from the second element.
DE7422116U concerns a manhole and duct cover that includes a mechanism that can be used to raise
the cover with respect to a frame of the manhole cover.
DE102009010802B3 also concerns a manhole cover and frame that includes a mechanism that can be used
to raise the cover with respect to a frame of the manhole cover.
AT336716B concerns a locking device for housings with a pivotable or insertable cover, the
locking device being designed to hold the cover of the housing in the closed position
in a simple manner without laborious aftertreatment of the housing parts. This is
achieved by providing at least one edge of the cover with an edge strip formed by
two right-angled bends at the cover edge, which, in the closed position of the cover,
engages in a longitudinal groove of a cylindrical profiled rod pivotable about its
longitudinal axis and which can be locked in the longitudinal groove by pivoting the
profiled rod, wherein the longitudinal groove of the cylindrical profiled rod has
the cross section of a quadrant of the circular cross section of the profiled rod.
US2009/0072548A1 provides a fixing base or mount suitable to fix an electronic device, such as satellite
navigation device, having a locking hole. The fixing base includes a housing, a driving
structure and a cam. The electronic device is configured to be held in the housing.
The driving structure passes through the housing, and the cam is disposed in the housing.
The cam has a hook, and the driving structure is fixedly connected to the cam. When
the driving structure drives the cam to rotate, the hook is locked to the locking
hole of the device, thereby securing the electronic device, such as a GPS navigating
device, to the fixing base so that the device can be temporarily mounted on a vehicle
dashboard for example.
SUMMARY OF THE INVENTION
[0007] An object of the present invention is to avoid the problems of the prior art and
provide an intrusion alarm component having a first element, a second element and
a locking device for releasably fastening the first element to the second element,
which intrusion alarm component indicates when the first element is releasable from
the second element for safe and efficient assembly and disassembly of the device.
[0008] The present invention relates to an intrusion alarm component comprising a first
element, a second element and a locking device for locking the first element to the
second element, wherein the locking device comprises an axis of rotation and a protrusion
for locking interaction with a projection of the second element, and wherein the locking
device is connected to the first element and is rotatable around the axis of rotation
between an unlocked position and a locked position in which the protrusion of the
locking device engages the projection of the second element, characterised in that
the component is configured for indicating when the first element is releasable from
the second element, the locking device comprises a first abutment surface offset from
the axis of rotation, the first abutment surface being formed by an axially projecting
pin of the locking device, and in that the second element comprises a second abutment
surface arranged in a position for engaging the first abutment surface of the locking
device when the locking device has been rotated to the unlocked position, in which
unlocked position the protrusion of the locking device is disengaged from the projection
of the second element, and, by further rotation of the locking device, the first abutment
surface is forced against the second abutment surface displacing the locking device
in relation to the second element while bringing the first element along therewith
so as to displace the first and second elements in relation to each other in a direction
generally orthogonal to the axis of rotation of the locking device. By means of the
first and second abutment surfaces the first element is forced away from the second
element to indicate that the device is unlocked and that the first element can be
removed from the second element without damaging the device. For example, the device
can be arranged to displace the first element in relation to the second element by
means of the first and second abutment surfaces to form a gap between the first and
second elements or parts thereof to indicate that the device is unlocked. Hence, the
first and second elements are in a first position in relation to each other when the
device is locked and are in a second position in relation to each other after displacement
of the first element in relation to the second element in the unlocked position of
the device. Hence, the first position corresponds to the locked position of the device,
wherein the first and second elements, e.g. are aligned, and in the second position
the device is unlocked and the first element is displaced in relation to the second
element, e.g. to form a gap between them. The arrangement of the elements and the
locking device results in a simple and effective assembly and disassembly of the device
by an operator.
[0009] The first and/or second abutment surfaces can be arched to smoothly rotate against
the other of the first and second abutment surfaces.
[0010] The first and second elements can comprise flexible connecting means for detachably
connecting the first element with the second element through inherent flexible properties
of the material. For example, the flexible connecting means or the first and second
elements can be made in plastic materials having somewhat resiliently flexible properties.
The flexible connecting means can be positioned to detachably connect the first and
second elements in a position in which they are radially displaced and, e.g. forming
the gap between them. The first and second elements can comprise a first set of flexible
connecting means and a second set of flexible connecting means, wherein the first
set of flexible connecting means can be positioned to detachably connect the first
and second elements in a first position, said first position corresponding to a locked
position of the device, and wherein the second set of flexible connecting means is
radially displaced in relation to the first set to detachably connect the first and
second elements in a second position, in which second position the first element is
displaced in relation to the second element compared to the positions of the first
and second elements in the locked position of the device. This results in a device
that is even easier to install and also to maintain and disassemble.
[0011] The invention also relates to a method for indicating when a first element is releasable
from a second element of a device in the form of an intrusion alarm component comprising
the first element, the second element and a locking device for fastening the first
element to the second element, the method comprising the steps of
- a) rotating the locking device around an axis of rotation to an unlocked position,
in which unlocked position a protrusion of the locking device is disengaged from a
projection of the second element,
- b) bringing a first abutment surface of the locking device to engage a second abutment
surface of the second element by said rotation, the first abutment surface being formed
by an axially projecting pin of the locking device, and
- c) by further rotation of the locking device around the axis of rotation forcing the
first abutment surface against the second abutment surface displacing the locking
device and the first element radially in relation to the second element in a direction
generally orthogonal to the axis of rotation of the locking device to indicate that
the first element is releasable from the second element.
[0012] Further characteristics and advantages of the present invention will become apparent
from the description of the embodiments below, the appended drawings and the dependent
claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The invention will now be described in more detail with the aid of exemplary embodiments
and with reference to the accompanying drawings, in which:
Fig. 1 is a schematic perspective view of a device comprising a first element, a second
element and a locking device for fastening the first element to the second element
according to one embodiment of the invention,
Fig. 2 is a schematic view of a part of the device of Fig. 1, showing a first side
of the locking device,
Fig. 3 is a schematic perspective view of the locking device according to one embodiment
of the invention,
Fig. 4 is a schematic view of a second side of the locking device of Fig. 3,
Fig. 5 is a schematic side view of the locking device according to Fig. 3,
Fig. 6 is a schematic perspective view of the device according to an alternative embodiment,
Fig. 7 is a schematic perspective view of the first element and the locking according
to one embodiment,
Fig. 8 is a schematic perspective view of an optional third element according to one
embodiment,
Fig. 9 is a schematic perspective view of the second element according to one embodiment,
Fig. 10 is a schematic view of the device, illustrating the locking device in a locked
position according to one embodiment,
Fig. 11 is a schematic longitudinal section view of a part of the device, illustrating
the locking device in the locked position,
Fig. 12 is a schematic cross section view of a part of the device, illustrating the
locking device in the locked position,
Fig. 13 is a schematic view of the device, illustrating the locking device and the
second element by dashed lines, wherein the locking device is in the locked position,
Fig. 14 is a schematic cross section view along the line II-II in Fig. 13,
Fig. 15 is a schematic cross section view along the line III-III in Fig. 13,
Fig. 16 is a schematic view of the device, illustrating the locking device in an unlocked
position according to one embodiment,
Fig. 17 is a schematic longitudinal section view of a part of the device, illustrating
the locking device in the unlocked position,
Fig. 18 is a schematic cross section view of a part of the device, illustrating the
locking device in the unlocked position,
Fig. 19 is a schematic view of the device, illustrating the locking device and the
second element by dashed lines, wherein the locking device is in the unlocked position,
Fig. 20 is a schematic cross section view along the line II-II in Fig. 19,
Fig. 21 is a schematic cross section view along the line III-III in Fig. 19,
Fig. 22 is a schematic view of the device, illustrating the locking device in an unlocked
and further rotated position according to one embodiment, in which the first element
with the locking device is radially displaced in relation to the second element,
Fig. 23 is a schematic longitudinal section view of a part of the device, illustrating
the locking device in the unlocked and further rotated position,
Fig. 24 is a schematic cross section view of a part of the device, illustrating the
locking device in the unlocked and further rotated position,
Fig. 25 is a schematic view of the device, illustrating the locking device and the
second element by dashed lines, wherein the locking device is in the unlocked and
further rotated position,
Fig. 26 is a schematic cross section view along the line II-II in Fig. 25, and
Fig. 27 is a schematic cross section view along the line III-III in Fig. 25.
DETAILED DESCRIPTION
[0014] With reference to Fig. 1 a device 10 according to one embodiment of the invention
is illustrated. The device 10 comprises a first element 11, a second element 12 and
a locking device 13. The locking device 13 is arranged for fastening the first element
11 to the second element 12. The device 10 also comprises an optional third element
14. For example, the first element 11 is a casing or a casing front cover, wherein
the second element 12 is a bracket for mounting on a structure, such as a wall, ceiling,
door frame, window frame or any other suitable supporting structure. For example,
the second element 12 is fastened to the supporting structure by means of conventional
fastening means 15, such as screws or similar, wherein the first element 11 can be
attached to the second element 12 by means of the locking device 13. For example,
the third element 14 is a back cover, wherein the first element 11 and the third element
14 form the casing for mounting on the second element 12. According to one embodiment,
the first element 11 and the third element 14 form a box-shaped enclosure. According
to the invention, the device 10 is an intrusion alarm component, wherein the first
element 11 is a casing or cover containing electronic parts, a detector, an intrusion
alarm gateway or similar, and wherein the first element 11 is arranged for mounting
on the second element 12 in the form of a bracket. In the embodiment of Fig. 1 the
device 10 is, for example, an intrusion alarm gateway or a casing and bracket for
an intrusion alarm gateway. The device 10 is, for example, made of plastic materials,
which plastic materials optionally have inherent resilient flexible properties. For
example, the device 10 is exclusively made of plastic materials.
[0015] With reference to Fig. 2 a part of the device 10 is illustrated, wherein an exterior
side of the locking device 13 is illustrated more in detail according to one embodiment.
The locking device 13 is arranged in a wall part of the first element 11, wherein
an exterior face of the locking device 13, for example, extends in a plane of said
wall. In the illustrated embodiment, the locking device 13 comprises a groove 16 for
receiving a tool, such as a screwdriver, the peripheral part of a coin or any other
suitable tool for rotating the locking device 13. The groove 16 extends across the
exterior face of the locking device 13.
[0016] With reference to Figs. 3-5 the locking device 13 is illustrated according to one
embodiment. The locking device 13 comprises an axis of rotation A, a cylinder portion
17, a flange 18 and a protrusion 19. The cylinder portion 17 extends along the axis
of rotation A and is arranged between the flange 18 and the protrusion 19. The flange
18 extends radially from a first end of the cylinder portion 17, wherein the protrusion
19 extends axially from a second end of the cylinder portion 17. For example, the
flange 18 extends around the entire periphery of the first end of the cylinder portion
17. Alternatively, the flange 18 is interrupted by cuts forming tabs or similar distributed
around the periphery of the first end of the cylinder portion 17. For example, the
cylinder portion 17 is formed with a circular cross section or a substantially circular
cross section to be able to be rotated in an aperture, which is described more in
detail below. The protrusion 19 is displaced from the axis of rotation A. Hence, the
protrusion 19 is displaced in the radial direction in relation to the axis of rotation
A and a centre of the locking device 13. The protrusion 19 is, e.g. formed as an axial
extension of the periphery of the cylinder portion 17 around a part thereof, wherein
the protrusion 19, for example, is formed as an arc-shaped rib. The locking device
13 also comprises a first abutment surface 20 being offset from the axis A of rotation.
The locking device 13 also comprises one or more radial extensions 21, such as a radially
extending tabs or similar. The radial extension 21 is connected to the second end
of the cylinder portion 17, forming a gap in the axial direction between the radial
extension 21 and the flange 18. Hence, the radial extension 21 is axially displaced
in relation to the flange 18. In the illustrated embodiment, the locking device 13
is provided with an axially extending pin 22, e.g. extending axially from the cylinder
portion 17, said pin 22 comprising the first abutment surface 20 and being positioned
offset from the axis of rotation A. Alternatively, the first abutment surface 20 is
formed by a radial extension extending radially from the cylinder portion 17.
[0017] With reference to Figs. 6-9 one embodiment of the device 10 is disclosed, wherein
the first element 11 is a casing and the second element 12 is a bracket or a back
cover for an intrusion alarm detector, such as a door detector or a window detector
or similar. According to the embodiment of Figs. 6-9 the device 10 comprises the first
element 11, the second element 12, the locking device 13 and the optional third element
14. The first element 11, the second element 12, the locking device 13 and the third
element 14 are, for example, made entirely of plastic materials, such as moulded plastic
articles. Alternatively, the device 10 comprises metal parts, such as an exterior
part of the locking device 13.
[0018] The first element 11 is, for example, formed as a casing having an aperture 23 and
a notch 24 for receiving the locking device 13. For example, the first element 11
comprises three interconnected walls substantially forming a U-shape, and first and
second end walls, wherein the aperture 23 is arranged in one of said end walls. The
locking device 13 is formed with the groove 16 for receiving a tool to rotate the
locking device 13. The locking device 13 also comprises the radial extension 21 to
be fitted through the notch 24. Hence, the first element 11 comprises the through
aperture 23 and the notch 24, wherein the aperture 23 is formed with an irregularity
in the
form of the notch 24. For example, the aperture 23 is circular or substantially circular,
wherein the notch 24 extends from an imaginary circumference of the circular aperture
23 and around a portion of the circumference to form the notch 24 in the first element
11. The aperture 23 can also be described as having a circular or substantially circular
first part and a second part in the form of the notch 24 as an irregularity on the
periphery of the circular part of the aperture 23. In the illustrated embodiment,
the notch 24 is substantially rectangular but can be of any desired shape.
[0019] To assemble the device 10 the radial extension 21 of the locking device 13 is aligned
with the notch 24, so that the protrusion 19 and the cylinder portion 17 of the locking
device 13 can be inserted into the aperture 23. The protrusion 19 is inserted into
the aperture 23. The radial extension 21 is fitted over the notch 24 while the cylinder
portion 17 is fitted over the aperture 23. Then, the cylinder portion 17 is inserted
into the aperture 23 while the radial extension 21 is inserted through the notch 24
until the flange 18 engages a first side, such as an exterior side, of the first element
11, so that the cylinder portion 17 is rotationally fitted in the aperture 23 and
the radial extension 21 is arranged at a second side of the first element 11, such
as an interior side. Hence, the aperture 23 is arranged for receiving the cylinder
portion 17 of the locking device 13. Then the locking device 13 is rotated around
the axis of rotation A, so that the radial extension 21 is rotationally displaced
in relation to the notch 24 and the locking device 13 is prevented from axial displacement
by means of the flange 19 and the radial extension 21. The flange 18 prevents the
locking device 13 from falling into the aperture 23. Hence, the flange 18 has larger
diameter than the aperture 24 or comprises parts extending radially beyond the circumference
of the aperture 23.
[0020] The protrusion 19 is arranged for locking engagement with the projection 26 by rotation
of the locking device 13, wherein displacement of the first element 11 in relation
to the second element 12 is prevented. When the locking device 13 is rotated, the
protrusion 19 engages the projection 26. The radially extending portion 27 supporting
the projection 26 extends
axially, so that the projection 26 is positioned between the protrusion 19 and the
axis A of rotation. For example, the engaging surfaces of the protrusion 19 and the
projection 26 are arc-shaped for locking the first element 11 to the second element
12 efficiently. For example, the engaging surfaces of the protrusion 19 and the projection
26 are arc-shaped around the axis A. For example, the engaging surfaces of the protrusion
19 and the projection 26 are arranged for locking in the radial direction. Axial displacement
of the first element 11 in relation to the second element 12 is, for example, prevented
by means of pins and openings or any other suitable parts of the first and second
elements 11, 12. Alternatively, the first and second elements 11, 12 comprise radially
extending and interacting parts to prevent undesired axial displacement between them.
[0021] The third element 14 according to one embodiment is disclosed in Fig. 8. The third
element 14 is, for example, arranged as a back cover or an inner frame for mounting
on or in the first element 11. The third element 14 is provided with a stop 25 to
prevent the locking device 13 from rotating to a position in which the radial extension
21 is aligned with the notch 24. For example, the third element 14 prevents the locking
device 13 from rotating back beyond the stop 25. The stop 25 is, e.g. formed as an
axially extending part. For example, the stop 25 is positioned to engage a radially
extending element of the locking device 13, such as the radial extension 21 to prevent
further rotation of the locking device 13. For example, the third element 14 is fixed
to the first element 11. For example, the third element 14 is fixed to the first element
11 by means of conventional fastening means, such as screws, snap-locking means using
mutually engaging parts and an inherent flexibility of the material, adhesives or
any other suitable fastening means.
[0022] The second element 12 according to one embodiment is disclosed in Fig. 9. The second
element 12 is provided with an axially extending projection 26 for interaction with
the protrusion 19 of the locking device 13. In the illustrated embodiment, the projection
26 is supported by a radially extending portion 27 to form a gap between a base of
the second element 12 and the projection 26 for receiving the protrusion 19.
[0023] The second element 12 comprises a second abutment surface 28 for interaction with
the first abutment surface 20 of the locking device 13. The second abutment surface
28 is arranged in the rotational path of the first abutment surface 20, said first
abutment surface 20 being displaced from the axis of rotation A. The second abutment
surface 28 is arranged as a stop for the rotating locking device 13 by engaging the
first abutment surface 20 thereof. The second abutment surface 28 extends in the axial
and/or radial direction. For example, the second abutment surface 28 extends substantially
in parallel to a plane of the base of the second element 12. For example, the second
abutment surface 28 is formed by the projection 26. Alternatively, the second abutment
surface 28 is formed by another axially and/or radially extending component or portion
of the second element 12.
[0024] In the embodiment of Fig. 9 the second element 12 comprises a first set of flexible
connecting means 29, such as bulges, for interaction with a corresponding first set
of flexible connecting means, such as bulges or indentations, of the first element
11 to detachably connect the first and second elements 11, 12 in a first position
by inherent resilient flexible properties of said flexible connecting means and/or
the first and second elements 11, 12. The second element 12 also comprises a second
set of flexible connecting means 30 for interaction with a corresponding second set
of flexible connecting means of the first element 11 to detachably connect the first
and second elements 11, 12 in a second position, which second position is displaced
in relation to the first position, by inherent resilient flexible properties of said
flexible connecting means and/or the first and second elements 11, 12.
[0025] With reference to Figs. 10-15 the device 10 is illustrated schematically in a locked
position, wherein the locking device 13 is connected to the first element 11 and the
protrusion 19 is engaging the projection 26 to prevent radial displacement of the
first element 11 in relation to the second element 12. The first element 11 with the
locking device 13 is fitted to the second element 12. When the locking device 13 is
rotated from the unlocked position to the locked position around the axis of rotation
A, the protrusion
19 is rotated into locking engagement with the projection 26. The projection 26 extends
substantially in the same direction as the protrusion 19, such as axially, and is
displaced radially in relation to the protrusion 19, so that the protrusion 19 can
be positioned in contact with the projection 26 to prevent radial displacement of
the first element 11 in relation to the second element 12. Hence, the protrusion 19
and the projection 26 are formed with mutually engaging surfaces resulting from the
axially extending protrusion 19 and projection 26. In the illustrated embodiment,
the projection 26 is arranged on the radially extending portion 27, wherein the radially
extending portion 27 and the projection 26 together from an L-shaped structure or
a hook structure. In the locked position the first element 11 is arranged in a predetermined
first position in relation to the second element 12. For example, the first and second
elements 11, 12 are aligned in said first position. For example, the first and second
elements 11, 12 are engaging each other along substantially their entire length in
the axial direction, wherein the first and second elements 11, 12 are arranged without
a gap between them in said first position.
[0026] As illustrated in Fig. 14 the first element 11 is connected to the second element
12 in the first position and the locked position also by means of the first set of
flexible connecting means 29, wherein the second set of flexible connecting means
30 are disengaged from each other as illustrated in Fig. 15. In the illustrated embodiment,
the first and second sets of flexible connecting means 29, 30 are formed by interacting
bugles and indentations.
[0027] As illustrated in Figs. 11-15 the first abutment surface 20 is arranged with a gap
to the second abutment surface 28 in the locked position.
[0028] With reference to Figs. 16-21 the device 10 is illustrated schematically in the unlocked
position, wherein the locking device 13 is connected to the first element 11 and the
protrusion 19 is disengaged from the projection 26 to allow radial displacement of
the first element 11 in relation to the second element 12. However, in the unlocked
position according to Figs. 16-21 the first and second elements 11, 12 are still in
the first position. Hence, the first
element 11 with the locking device 13 is still fitted to the second element 12. When
the locking device 13 is rotated from the locked position to the unlocked position
around the axis of rotation A, which is illustrated by means of the arrow B in Fig.
16, the protrusion 19 is rotated to disengage from the projection 26. Simultaneously,
the first abutment surface 20 is rotated towards the second abutment surface 28. When
the protrusion 19 is disengaged from the projection 26 or after the protrusion 19
has been disengaged from the projection 26, the first abutment surface 20 is brought
to engage the second abutment surface 28, which is illustrated in Figs. 17-21. In
Figs. 16-21 the device 10 is in the unlocked position but the first element 11 is
still in the first position in relation to the second element 12, wherein the first
and second elements 11, 12, e.g. are aligned. Hence, the first and second elements
11, 12 are, e.g. still engaging each other along substantially their entire length
in the axial direction, wherein the first and second elements 11, 12, e.g. are arranged
without a gap between them.
[0029] As illustrated in Fig. 20 the first element 11 is still connected to the second element
12 also by means of the first set of flexible connecting means 29, wherein the second
set of flexible connecting means 30 are disengaged from each other as illustrated
in Fig. 21.
[0030] With reference to Figs. 22-27 the device 10 is illustrated schematically, wherein
the first element 11 has been displaced in relation to the second element 12, so that
the first and second elements 11, 12 are in a second position, which second position
is displaced in relation to the first position described above. In Figs. 22-27 the
device 10 is in the unlocked position and the locking device 13 has been rotated further
from the unlocked position, which is illustrated by means of the arrow C in Fig. 22.
Hence, the locking device 13 has been rotated further in the same direction as from
the locked position to the unlocked position. Hence, the protrusion 19 has been rotated
further away from the projection 26 and the protrusion 19 is disengaged from the projection
26 to allow radial displacement of the first element 11 in relation to the second
element 12. When the locking device 13 is rotated further around the axis of rotation
A, the first abutment
surface 20 is forced against the second abutment surface 28 and results in a displacement
of the locking device 13 in relation to the second element 12. As the locking device
13 is rotatably connected to the first element 11 the first element 11 is brought
along the locking device 13 and, hence, also displaced in relation to the second element
12. Due to continued rotation of the locking device 13 after the first abutment surface
20 has engaged the second abutment surface 28 the first element 11 will be forced
away from the second element 12, substantially in the radial direction, i.e. perpendicular
to the axis of rotation A of the locking device 13. The displacement of the first
element 11 in relation to the second element results in an indication, such as a visual
indication, e.g. in the form of a gap between parts of the first and second elements
11, 12, that the device 10 is in the unlocked position and that the first element
11 is releasable from the second element 12.
[0031] As illustrated in Fig. 26 the first set of flexible connecting means 29 has been
disengaged, wherein the first element 11 is detachably connected to the second element
12 in the displaced second position by means of the second set of flexible connecting
means 30. It is understood that the first and/or second sets of flexible connecting
means 29, 30 are optional.
[0032] According to one embodiment the locking device 13 is arranged with a predetermined
frictional resistance against the first element 11 depending on the rotational position
of the locking device 13. Hence, the locking device 13 and the first element 11 are
arranged to provide a higher rotational friction of the locking device 13 in a first
rotational position area of the locking device 13 than in a second rotational position
area thereof. For example, the higher rotational friction is set so that a tool is
required for rotating the locking device 13, wherein the lower rotational friction
is set to allow rotation of the locking device 13 without any tool. The first rotational
position area corresponds to the locked position, wherein the second rotational position
area corresponds to the unlocked position of the locking device 13. Hence, the higher
rotational friction is set to prevent the locking device 13 from being rotated from
the locked position to the unlocked position without a tool. Also, the higher rotational
friction prevents the locking device 13 from
unintentional rotation from unlocked position to locked position, e.g. during transport
or handling of the device 10 being delivered in unlocked position. The lower rotational
friction, which for example is zero, is set so that the locking device 13 easily can
be rotated during assembly of the device 10. For example, the first rotational position
area is an area extending from a first angle to a second angle, wherein the first
angle is 0° and corresponds to the end position of the locking device 13 in the locked
position. The second rotational position area extends from the second angle to a third
angle. The second angle is larger than the first angle and hence larger than 0° but
smaller than the third angle and also less than 360°. For example, the second angle
is 270° or less or 180° or less. The second angle is, e.g. 20-180 degrees, 45-90 degrees
or 50-55 degrees, such as 52 degrees. The third angle is larger than the second angle
and less than 360°. For example, the third angle is 270° or less or 180° or less.
For example, the third angle is 30-300 degrees, 45-180 degrees or 50-135 degrees,
such as 90 degrees. According to one embodiment at least the higher rotational friction
of the locking device 13 is provided by means of one or more axial elevations (not
illustrated in the drawings) on the first element 11 for engaging the flange 18 and/or
the radial extension 21 of the locking device 13 when the locking device 13 is in
its first rotational position area. The dimension of said one or more elevations in
the axial direction is set to provide the desired rotational friction. The size of
the first rotational position area is, e.g. set by the length of the flange surface
and/or radial extension surface engaging said one or more elevations.
1. An intrusion alarm component (10) comprising a first element (11), a second element
(12) and a locking device (13) for locking the first element (11) to the second element
(12), wherein:
the locking device (13) comprises an axis (A) of rotation and a protrusion (19) for
locking interaction with a projection (26) of the second element (12), and wherein
the locking device (13) is connected to the first element (11) and is rotatable around
the axis (A) of rotation between an unlocked position and a locked position in which
the protrusion (19) of the locking device engages the projection (26) of the second
element (12),
characterised in that
the component is configured for indicating when the first element (11) is releasable
from the second element (12), the locking device (13) comprises a first abutment surface
(20) offset from the axis (A) of rotation, the first abutment surface (20) being formed
by an axially projecting pin (22) of the locking device (13), and in that the second element (12) comprises a second abutment surface (28) arranged in a position
for engaging the first abutment surface (20) of the locking device (13) when the locking
device (13) has been rotated to the unlocked position, in which unlocked position
the protrusion (19) of the locking device (13) is disengaged from the projection (26)
of the second element (12), and, by further rotation of the locking device (13), the
first abutment surface (20) is forced against the second abutment surface (28) displacing
the locking device (13) in relation to the second element (12) while bringing the
first element along (11) therewith so as to displace the first and second elements
(11, 12) in relation to each other in a direction generally orthogonal to the axis
(A) of rotation of the locking device.
2. An intrusion alarm component according to claim 1, wherein the first abutment surface
(20) is arched.
3. An intrusion alarm component according to claim 1 or claim 2, wherein the projection
(26) of the second element (12) extends axially and is arranged between the protrusion
(19) and the axis (A) when the locking device (13) is in its locked position, said
projection (26) having a radially outwards facing locking surface for engaging the
protrusion (19) of the locking device (13) in the locked position, and a radially
inwards facing surface forming the second abutment surface (28).
4. An intrusion alarm component according to any of the preceding claims, wherein the
protrusion (19) is offset from the axis (A) of rotation and wherein the first abutment
surface (20) is angularly displaced around said axis (A) in relation to the protrusion
(19).
5. An intrusion alarm component according to any of the preceding claims, wherein the
first and second elements (11, 12) comprises flexible connecting means (30) for detachably
connecting the first element (11) with the second element (12) through inherent flexible
properties thereof, and wherein said flexible connecting means (30) are positioned
to detachably connect the first and second elements when the first element (11) is
displaced in relation to the second element (12).
6. An intrusion alarm component according to claim 5, wherein the first and second elements
(11, 12), respectively, comprise a first set of flexible connecting means (29) and
a second set of flexible connecting means (30), wherein the first set (29) is positioned
to detachably connect the first and second elements (11, 12) in a first position,
and wherein the second set (30) is radially displaced in relation to the first set
(29) to detachably connect the first and second elements in a second position.
7. An intrusion alarm component (10) according to any of the preceding claims, wherein
the locking device (13) comprises a cylinder portion (17) extending along the axis
(A) of rotation, and a flange (18) extending radially from a first end of the cylinder
portion (17), wherein the protrusion (19) is projecting from a second end of the cylinder
portion (17), wherein the first element (11) is provided with a through aperture (23)
for receiving the cylinder portion (17) of the locking device (13), and wherein the
flange (18) of the locking device (13) engages a first side of the first element (11)
at the aperture (23).
8. An intrusion alarm component (10) according to claim 7, wherein a third element (14)
is fixed to the first element (11), wherein the locking device (13) comprises a radial
extension (21) extending around a part of the circumference of the cylinder portion
(17), wherein the aperture (23) is formed with a notch (24) for receiving the radial
extension (21), and wherein the third element (14) is provided with a stop (25) to
prevent the locking device (13) from rotating to a position in which the extension
(21) is aligned with the notch (24).
9. An intrusion alarm component according to any of the preceding claims, wherein the
first element (11) is a casing front cover.
10. An intrusion alarm component according to any of the preceding claims, wherein the
second element (12) is a bracket or a back cover.
11. An intrusion alarm component according to any of the preceding claims, comprising
a detector and/or a processor and/or wireless communication means.
12. A method for indicating when a first element (11) is releasable from a second element
(12) of a device (10) in the form of an intrusion alarm component, comprising the
first element (11), the second element (12) and a locking device (13) for fastening
the first element (11) to the second element (12), the method comprising the steps
of
a) rotating the locking device (13) around an axis (A) of rotation to an unlocked
position, in which unlocked position a protrusion (19) of the locking device (13)
is disengaged from a projection (26) of the second element (12),
b) bringing a first abutment surface (20) of the locking device (13) to engage a second
abutment surface (28) of the second element (12) by said rotation, the first abutment
surface (20) being formed by an axially projecting pin (22) of the locking device
(13), and
c) by further rotation of the locking device (13) around the axis (A) of rotation
forcing the first abutment surface (20) against the second abutment surface (28) displacing
the locking device (13) and the first element (11) in relation to the second element
(12) in a direction generally orthogonal to the axis (A) of rotation of the locking
device to indicate that the first element (11) is releasable from the second element
(12).
13. A method according to claim 12, comprising the steps of detachably connecting the
first element (11) with the second element (12) in a first position corresponding
to the locked position by means of a first set of flexible connecting means (29) of
the first and second elements (11, 12) through inherent flexible properties thereof,
and after step c) detachably connecting the first element (11) with the second element
(12) in a displaced second position by means of a second set of flexible connecting
means (30) of the first and second elements (11, 12) through inherent flexible properties
thereof.
1. Einbruchmeldekomponente (10), umfassend ein erstes Element (11), ein zweites Element
(12) und eine Verriegelungsvorrichtung (13) zum Verriegeln des ersten Elements (11)
mit dem zweiten Element (12), wobei:
die Verriegelungsvorrichtung (13) eine Achse (A) einer Drehung und einen Vorsprung
(19) für eine Verriegelungswechselwirkung mit einem Vorsprung (26) des zweiten Elements
(12) umfasst, und wobei die Verriegelungsvorrichtung (13) mit dem ersten Element (11)
verbunden ist und um die Achse (A) der Drehung herum zwischen einer entriegelten Position
und einer verriegelten Position drehbar ist, in der der Vorsprung (19) der Verriegelungsvorrichtung
den Vorsprung (26) des zweiten Elements (12) in Eingriff nimmt,
dadurch gekennzeichnet, dass
die Komponente zum Anzeigen konfiguriert ist, wann das erste Element (11) von dem
zweiten Element (12) lösbar ist, die Verriegelungsvorrichtung (13) eine erste Anlageoberfläche
(20) umfasst, die von der Achse (A) der Drehung versetzt ist, wobei die erste Anlageoberfläche
(20) durch einen axial vorspringenden Stift (22) der Verriegelungsvorrichtung (13)
ausgebildet ist, und dadurch, dass das zweite Element (12) eine zweite Anlageoberfläche (28) umfasst, die in einer Position
zum Ineingriffnehmen der ersten Anlageoberfläche (20) der Verriegelungsvorrichtung
(13) angeordnet ist, wenn die Verriegelungsvorrichtung (13) in die entriegelte Position
gedreht wurde, wobei in der entriegelten Position der Vorsprung (19) der Verriegelungsvorrichtung
(13) von dem Vorsprung (26) des zweiten Elements (12) außer Eingriff gebracht wird,
und, durch weitere Drehung der Verriegelungsvorrichtung (13), die erste Anlageoberfläche
(20) gegen die zweite Anlageoberfläche (28) gedrückt wird, um die Verriegelungsvorrichtung
(13) in Bezug auf das zweite Element (12) zu verschieben, während das erste Element
entlang (11) damit bewegt wird, um das erste und das zweite Element (11, 12) in Bezug
auf einander in einer Richtung im Allgemeinen orthogonal zu der Achse (A) der Drehung
zu verschieben.
2. Einbruchmeldekomponente nach Anspruch 1, wobei die erste Anlageoberfläche (20) gewölbt
ist.
3. Einbruchmeldekomponente nach Anspruch 1 oder 2, wobei sich der Vorsprung (26) des
zweiten Elements (12) axial erstreckt und zwischen dem Vorsprung (19) und der Achse
(A) angeordnet ist, wenn die Verriegelungsvorrichtung (13) in ihrer verriegelten Position
ist, wobei der Vorsprung (26) eine radial nach außen gerichtete Verriegelungsoberfläche
zum Ineingriffnehmen des Vorsprungs (19) der Verriegelungsvorrichtung (13) in der
verriegelten Position und eine radial nach innen gerichtete Fläche aufweist, die die
zweite Anlageoberfläche (28) ausbildet.
4. Einbruchmeldekomponente nach einem der vorstehenden Ansprüche, wobei der Vorsprung
(19) von der Achse (A) der Drehung versetzt ist und wobei die erste Anlageoberfläche
(20) um die Achse (A) herum in Bezug auf den Vorsprung (19) winkelig verschoben ist.
5. Einbruchmeldekomponente nach einem der vorstehenden Ansprüche, wobei das erste und
das zweite Element (11, 12) flexible Verbindungsmittel (30) zum lösbaren Verbinden
des ersten Elements (11) mit dem zweiten Element (12) durch inhärente flexible Eigenschaften
davon umfassen, und wobei die flexiblen Verbindungsmittel (30) positioniert sind,
um das erste und das zweite Element lösbar zu verbinden, wenn das erste Element (11)
in Bezug auf das zweite Element (12) verschoben wird.
6. Einbruchmeldekomponente nach Anspruch 5, wobei das erste beziehungsweise das zweite
Element (11, 12) einen ersten Satz flexibler Verbindungsmittel (29) und einen zweiten
Satz flexibler Verbindungsmittel (30) umfasst, wobei der erste Satz (29) positioniert
ist, um das erste und das zweite Element (11, 12) in einer ersten Position lösbar
zu verbinden, und wobei der zweite Satz (30) in Bezug auf den ersten Satz (29) radial
verschoben ist, um das erste und das zweite Element in eine zweite Position lösbar
zu verbinden.
7. Einbruchmeldekomponente (10) nach einem der vorstehenden Ansprüche, wobei die Verriegelungsvorrichtung
(13) einen Zylinderabschnitt (17), der sich entlang der Achse (A) der Drehung erstreckt,
und einen Flansch (18) umfasst, der sich von einem ersten Ende des Zylinderabschnitts
(17) radial erstreckt, wobei der Vorsprung (19) von einem zweiten Ende des Zylinderabschnitts
(17) vorspringt, wobei das erste Element (11) mit einer Durchgangsöffnung (23) zum
Aufnehmen des Zylinderabschnitts (17) der Verriegelungsvorrichtung (13) versehen ist,
und wobei der Flansch (18) der Verriegelungsvorrichtung (13) eine erste Seite des
ersten Elements (11) an der Öffnung (23) in Eingriff nimmt.
8. Einbruchmeldekomponente (10) nach Anspruch 7, wobei ein drittes Element (14) an dem
ersten Element (11) befestigt ist, wobei die Verriegelungsvorrichtung (13) eine radiale
Erstreckung (21) umfasst, die sich um einen Teil des Umfangs des Zylinderabschnitts
(17) herum erstreckt, wobei die Öffnung (23) mit einer Kerbe (24) zum Aufnehmen der
radialen Erstreckung (21) ausgebildet ist und wobei das dritte Element (14) mit einem
Anschlag (25) versehen ist, um die Verriegelungsvorrichtung (13) an dem Drehen in
eine Position zu hindern, in der die Erstreckung (21) an der Kerbe (24) ausgerichtet
ist.
9. Einbruchmeldekomponente nach einem der vorstehenden Ansprüche, wobei das erste Element
(11) eine Gehäusefrontabdeckung ist.
10. Einbruchmeldekomponente nach einem der vorstehenden Ansprüche, wobei das zweite Element
(12) eine Halterung oder eine Rückabdeckung ist.
11. Einbruchmeldekomponente nach einem der vorstehenden Ansprüche, umfassend einen Detektor
und/oder einen Prozessor und/oder drahtlose Kommunikationsmittel.
12. Verfahren zum Anzeigen, wann ein erstes Element (11) von einem zweiten Element (12)
einer Vorrichtung (10) in Form einer Einbruchmeldekomponente lösbar ist, umfassend
das erste Element (11), das zweite Element (12) und eine Verriegelungsvorrichtung
(13) zum Befestigen des ersten Elements (11) an dem zweiten Element (12), das Verfahren
umfassend die Schritte
a) Drehen der Verriegelungsvorrichtung (13) um eine Achse (A) der Drehung herum in
eine entriegelte Position, wobei in der entriegelten Position ein Vorsprung (19) der
Verriegelungsvorrichtung (13) von einem Vorsprung (26) des zweiten Elements (12) außer
Eingriff gebracht ist,
b) Bringen einer ersten Anlageoberfläche (20) der Verriegelungsvorrichtung (13) dazu,
um durch die Drehung eine zweite Anlageoberfläche (28) des zweiten Elements (12) in
Eingriff zu nehmen, wobei die erste Anlageoberfläche (20) durch einen axial vorspringenden
Stift (22) der Verriegelungsvorrichtung (13) ausgebildet ist, und
c) durch weitere Drehung der Verriegelungsvorrichtung (13) um die Achse (A) der Drehung
herum, die erste Anlageoberfläche (20) gegen die zweite Anlageoberfläche (28) drückt,
die die Verriegelungsvorrichtung (13) und das erste Element (11) in Bezug auf das
zweite Element (12) in einer Richtung verschiebt, die im Allgemeinen orthogonal zu
der Achse (A) der Drehung der Verriegelungsvorrichtung ist, um anzuzeigen, dass das
erste Element (11) von dem zweiten Element (12) lösbar ist.
13. Verfahren nach Anspruch 12, umfassend die Schritte des lösbaren Verbindens des ersten
Elements (11) mit dem zweiten Element (12) in einer ersten Position, die der verriegelten
Position entspricht, mittels eines ersten Satzes flexibler Verbindungsmittel (29)
des ersten und des zweiten Elements (11, 12) durch inhärente flexible Eigenschaften
davon, und nach Schritt c), des lösbaren Verbindens des ersten Elements (11) mit dem
zweiten Element (12) in einer verschobenen zweiten Position mittels eines zweiten
Satzes flexibler Verbindungsmittel (30) des ersten und des zweiten Elements (11, 12)
durch inhärente flexible Eigenschaften davon.
1. Composant d'alarme d'intrusion (10) comprenant un premier élément (11), un deuxième
élément (12) et un dispositif de verrouillage (13) pour verrouiller le premier élément
(11) sur le deuxième élément (12), dans lequel :
le dispositif de verrouillage (13) comprend un axe (A) de rotation et une protubérance
(19) pour une interaction de verrouillage avec une saillie (26) du deuxième élément
(12), et dans lequel le dispositif de verrouillage (13) est relié au premier élément
(11) et peut tourner autour de l'axe (A) de rotation entre une position déverrouillée
et une position verrouillée dans laquelle la protubérance (19) du dispositif de verrouillage
vient en prise avec la saillie (26) du deuxième élément (12),
caractérisé en ce que
le composant est conçu pour indiquer quand le premier élément (11) peut être libéré
du deuxième élément (12), le dispositif de verrouillage (13) comprend une première
surface de butée (20) décalée de l'axe (A) de rotation, la première surface de butée
(20) étant formée par une broche en saillie axiale (22) du dispositif de verrouillage
(13), et en ce que le deuxième élément (12) comprend une seconde surface de butée (28) agencée dans
une position pour venir en prise avec la première surface de butée (20) du dispositif
de verrouillage (13) lorsque le dispositif de verrouillage (13) a été tourné vers
la position déverrouillée, dans laquelle position déverrouillée la protubérance (19)
du dispositif de verrouillage (13) n'est plus en prise avec la saillie (26) du deuxième
élément (12), et, par une rotation supplémentaire du dispositif de verrouillage (13),
la première surface de butée (20) est forcée contre la seconde surface de butée (28)
déplaçant le dispositif de verrouillage (13) par rapport au deuxième élément (12)
tout en amenant le premier élément (11) conjointement à celui-ci de façon à déplacer
les premier et deuxième éléments (11, 12) l'un par rapport à l'autre dans une direction
généralement orthogonale à l'axe (A) de rotation du dispositif de verrouillage.
2. Composant d'alarme d'intrusion selon la revendication 1, dans lequel la première surface
de butée (20) est arquée.
3. Composant d'alarme d'intrusion selon la revendication 1 ou la revendication 2, dans
lequel la saillie (26) du deuxième élément (12) s'étend axialement et est agencée
entre la protubérance (19) et l'axe (A) lorsque le dispositif de verrouillage (13)
est dans sa position verrouillée, ladite saillie (26) ayant une surface de verrouillage
faisant face radialement vers l'extérieur pour venir en prise avec la protubérance
(19) du dispositif de verrouillage (13) dans la position verrouillée, et une surface
faisant face radialement vers l'intérieur formant la seconde surface de butée (28).
4. Composant d'alarme d'intrusion selon l'une quelconque des revendications précédentes,
dans lequel la protubérance (19) est décalée par rapport à l'axe (A) de rotation et
dans lequel la première surface de butée (20) est déplacée de manière angulaire autour
dudit axe (A) par rapport à la protubérance (19).
5. Composant d'alarme d'intrusion selon l'une quelconque des revendications précédentes,
dans lequel les premier et deuxième éléments (11, 12) comprennent des moyens de liaison
flexibles (30) pour relier de manière amovible le premier élément (11) avec le deuxième
élément (12) grâce aux propriétés flexibles inhérentes de ceux-ci, et dans lequel
lesdits moyens de liaison flexibles (30) sont positionnés pour relier de manière amovible
les premier et deuxième éléments lorsque le premier élément (11) est déplacé par rapport
au deuxième élément (12).
6. Composant d'alarme d'intrusion selon la revendication 5, dans lequel les premier et
deuxième éléments (11, 12), respectivement, comprennent un premier ensemble de moyens
de liaison flexibles (29) et un second ensemble de moyens de liaison flexibles (30),
dans lequel le premier ensemble (29) est positionné pour relier de manière amovible
les premier et deuxième éléments (11, 12) dans une première position, et dans lequel
le second ensemble (30) est déplacé radialement par rapport au premier ensemble (29)
pour relier de manière amovible les premier et deuxième éléments dans une seconde
position.
7. Composant d'alarme d'intrusion (10) selon l'une quelconque des revendications précédentes,
dans lequel le dispositif de verrouillage (13) comprend une partie cylindre (17) s'étendant
le long de l'axe (A) de rotation, et une bride (18) s'étendant radialement à partir
d'une première extrémité de la partie cylindre (17), dans lequel la protubérance (19)
fait saillie à partir d'une seconde extrémité de la partie cylindre (17), dans lequel
le premier élément (11) est pourvu d'une ouverture traversante (23) pour recevoir
la partie cylindre (17) du dispositif de verrouillage (13), et dans lequel la bride
(18) du dispositif de verrouillage (13) vient en prise avec un premier côté du premier
élément (11) au niveau de l'ouverture (23).
8. Composant d'alarme d'intrusion (10) selon la revendication 7, dans lequel un troisième
élément (14) est fixé au premier élément (11), dans lequel le dispositif de verrouillage
(13) comprend une extension radiale (21) s'étendant autour d'une partie de la circonférence
de la partie cylindre (17), dans lequel l'ouverture (23) est formée avec une encoche
(24) pour recevoir l'extension radiale (21), et dans lequel le troisième élément (14)
est pourvu d'un arrêt (25) pour empêcher le dispositif de verrouillage (13) de tourner
jusqu'à une position dans laquelle l'extension (21) est alignée avec l'encoche (24).
9. Composant d'alarme d'intrusion selon l'une quelconque des
revendications précédentes, dans lequel le premier élément (11) est un couvercle avant
de boîtier.
10. Composant d'alarme d'intrusion selon l'une quelconque des
revendications précédentes, dans lequel le deuxième élément (12) est un support ou
un couvercle arrière.
11. Composant d'alarme d'intrusion selon l'une quelconque des revendications précédentes,
comprenant un détecteur et/ou un processeur et/ou
des moyens de communication sans fil.
12. Procédé destiné à indiquer quand un premier élément (11) peut être libéré d'un deuxième
élément (12) d'un dispositif (10) sous la forme d'un composant d'alarme d'intrusion,
comprenant le premier élément (11), le deuxième élément (12) et un dispositif de verrouillage
(13) pour attacher le premier élément (11) au deuxième élément (12), le procédé comprenant
les étapes consistant à
a) faire tourner le dispositif de verrouillage (13) autour d'un axe (A) de rotation
jusqu'à une position déverrouillée, dans laquelle position déverrouillée une protubérance
(19) du dispositif de verrouillage (13) n'est plus en prise avec une saillie (26)
du deuxième élément (12),
b) amener une première surface de butée (20) du dispositif de verrouillage (13) à
venir en prise avec une seconde surface de butée (28) du deuxième élément (12) par
ladite rotation, la première surface de butée (20) étant formée par une broche en
saillie axiale (22) du dispositif de verrouillage (13), et
c) par une rotation supplémentaire du dispositif de verrouillage (13) autour de l'axe
(A) de rotation forcer la première surface de butée (20) contre la seconde surface
de butée (28) déplaçant le dispositif de verrouillage (13) et le premier élément (11)
par rapport au deuxième élément (12) dans une direction généralement orthogonale à
l'axe (A) de rotation du dispositif de verrouillage pour indiquer que le premier élément
(11) peut être libéré du deuxième élément (12).
13. Procédé selon la revendication 12, comprenant les étapes consistant à relier de manière
amovible le premier élément (11) avec le deuxième élément (12) dans une première position
correspondant à la position verrouillée au moyen d'un premier ensemble de moyens de
liaison flexibles (29) des premier et deuxième éléments (11, 12) grâce aux propriétés
flexibles inhérentes de ceux-ci, et après l'étape c) relier de manière amovible le
premier élément (11) avec le deuxième élément (12) dans une seconde position déplacée
au moyen d'un second ensemble de moyens de liaison flexibles (30) des premier et deuxième
éléments (11, 12) grâce aux propriétés flexibles inhérentes de ceux-ci.