TECHNICAL FIELD
[0001] The present invention relates to a vehicle press-operation member, which is a member
being provided on an instrument panel of a vehicle or the like and receiving a pressing
operation, and can change in shape in such a way as to reduce the amount of protrusion
from a surface of the instrument panel or the like, when receiving a certain amount
of pressing load or more, and to a vehicle operation apparatus including the vehicle
press-operation member.
BACKGROUND ART
[0002] In a vehicle such as an automobile, in general, an operating member for operating
an air conditioner, audio instrument or the like is provided on a panel (for example,
an instrument panel) which faces inside a vehicle interior, and a pressing operation
member which receives a pressing operation with a finger or the like exists therein.
The vast majority of such press-operation members are provided so as to protrude inside
the vehicle interior from a surface of the panel in such a way as to be able to receive
an operation by a passenger.
[0003] It is preferable that the amount of protrusion of such a press-operation member is
designed so as to satisfy both safety and operability aspects. Specifically, it is
desirable to secure a certain large amount of protrusion in order to facilitate an
operation by the passenger. On the other hand, assuming a case in which the passenger
makes contact with a protruding portion of the press-operation member when the vehicle
collides or stops suddenly, it is desirable, from the viewpoint of safety, that the
amount of protrusion of the pressing operation member is small, and actually, there
exist some countries which restrict the amount of protrusion.
[0004] Therefore, to date, as means for satisfying both safety and operability, development
of an apparatus wherein, when a certain amount of pressing load or more is applied
to the pressing operation member, one portion of the pressing operation member can
move rearward in the pressing direction (that is, the amount of protrusion decreases
rapidly) is being promoted.
[0005] For example, the press-operation apparatus as shown in Fig. 14 is disclosed in Patent
Document 1. The apparatus includes a circuit substrate 6, a stator member 7 provided
thereon, and a push knob 4 which is a press-operation member held on the stator member
7. The push knob 4 integrally has a cylindrical large diameter portion 4a on the side
of receiving a pressing operation, a small diameter portion 4b, which is smaller in
diameter than the large diameter portion 4a and is held on the stator member 7, and
a fragile portion 4e which radially connects the rear end of the large diameter portion
4a and the front end of the small diameter portion 4b.
[0006] The fragile portion 4e is thinner than the other regions, and a plurality of slits
4d are formed therein. The shear strength of the fragile portion 4e is designed such
that, when a large pressing load (in the drawing, a load from above) is applied to
the large diameter portion 4a, the fragile portion 4e is broken being sheared in an
up-down direction, which causes the large diameter portion 4a to be displaced in a
descending direction (that is, to retract) relative to the small diameter portion
4b and the amount of protrusion of the whole of the push knob to thereby be rapidly
reduced.
[0007] With respect to the apparatus, the shape of the fragile portion 4e needs to be designed
such that, when a load applied to the large diameter portion 4a is of a predetermined
value or more, a certain amount of shear load or more acts on the fragile portion
4e to thereby cause the fragile portion 4e to break. However, such design is difficult.
Specifically, the shear load varies depending on a position on the large diameter
portion 4a to which a pressing load is applied, and moreover, a position on the fragile
portion 4e to which a pressing load is applied from the rear end of the large diameter
portion 4a and a position on the fragile portion 4e which breaks are different in
the radial direction, which thereby makes it difficult to specify a relationship between
the pressing force and the shear load of the fragile portion 4e. Also, the fragile
portion 4e is designed on the assumption that a shear load acts circumferentially
equally on the fragile portion 4e, but actually, there is fear that, when a pressing
force is applied to an off-center position on the large diameter portion 4a, the push
knob inclines to thereby cause a disproportion (a circumferential disproportion) in
a load applied to the fragile portion 4e.
Related Art Documents
Patent Documents
SUMMARY OF THE INVENTION
[0009] An object of the invention is to provide a vehicle press-operation member wherein
it is easy to design a breakable portion which is broken in order to reduce the amount
of protrusion from a panel when a certain amount of pressing force or more is applied,
and it is possible to increase the reliability of a reduction in the amount of protrusion
when the pressing force acts, and a vehicle operation apparatus including the vehicle
press-operation member. Specifically, the invention provides a vehicle press-operation
member, which is provided on a panel in a vehicle interior in such a way as to protrude
on the vehicle interior side from a surface of the panel for receiving a pressing
operation, is configured in such a way that the amount of protrusion decreases by
receiving pressure with a certain amount of force or more. The vehicle press-operation
member includes a base member mounted on the panel or a member fixed to the panel,
and a member to be operated which is mounted on the base member in such a way as to
protrude on the vehicle interior side from the base member and receives a pressing
operation. The base member has a guide holding portion which holds, while guiding,
the member to be operated in such a way that the member to be operated slides to the
base member in a direction parallel to the pressing direction, and a stopper which,
by coming in contact with the member to be operated, restricts the member to be operated
from sliding in a direction in which the member to be operated moves more rearward
than a predetermined pressing restriction position, and the member to be operated
has a guided portion which fits in the guide holding portion and is guided by the
guide holding portion, and a contact portion which, by coming in contact with the
stopper of the base member, prevents the slide in the direction in which the member
to be operated moves rearward. Either of the stopper or the contact portion configures
a breakable portion having a shape such that it is broken by receiving a pressing
force from the other in the pressing direction when the member to be operated receives
pressure with a certain amount of force or more, thereby allowing a further slide
of the member to be operated in the pressing direction.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010]
[Fig. 1] Fig. 1 is an exploded perspective view of a vehicle operation apparatus according
to an embodiment of the invention, seen from a front side.
[Fig. 2] Fig. 2 is an exploded perspective view of a pressing operation member of
the vehicle press-operation apparatus seen from a back side.
[Fig. 3] Fig. 3 is a front view of the press-operation member.
[Fig. 4] Fig. 4 is a side view of the vehicle operation apparatus.
[Fig. 5] Fig. 5 is a sectional view taken along line V-V of Fig. 4.
[Fig. 6] (a) is a sectional view taken along line VI-VI of Fig. 5, and (b) is a sectional
side view showing a condition in which an operating knob which is a member to be operated
moves rearward, from the condition of (a), accompanying a break of a breakable portion.
[Fig. 7] Fig. 7 is a sectional view taken along line VII-VII of Fig. 5.
[Fig. 8] Fig. 8 is a perspective view showing a base member of the pressing operation
member.
[Fig. 9] Fig. 9 is a front view of the base member.
[Fig. 10] Fig. 10 is a perspective view of the operating knob seen from the back side.
[Fig. 11] Fig. 11 is a perspective view of the operating knob seen from the front
side.
[Fig. 12] Fig. 12 is a sectional perspective view showing a condition in which the
operating knob is in a pressing restriction position.
[Fig. 13] Fig. 13 is a sectional perspective view showing a condition in which the
operating knob moves more rearward than the pressing restriction position accompanying
a break of the breakable portion.
[Fig. 14] Fig. 14 is a sectional view of a heretofore known vehicle operation apparatus.
MODES FOR CARRYING OUT THE INVENTION
[0011] Preferred embodiments of the invention will be described referring to Figs. 1 to
13.
[0012] A vehicle operation apparatus according to the embodiment includes a press-operation
member 10, a circuit substrate 12, and a panel 14. The panel 14 is mounted in an appropriate
place (for example, on an instrument panel) inside a vehicle interior, and the circuit
substrate 12 is fixed to the reverse of the panel 14. The press-operation member 10
is fixed to the circuit substrate 12 in a condition in which it passes through an
unshown through hole provided in the panel 14, and receives a pressing operation in
a direction approximately perpendicular to the circuit substrate 12 from the front
side of the panel 14 and receives pressure with a certain amount of force or more
which exceeds a normal operation force, to thereby change in shape in such a way that
the amount of protrusion of the pressing operation member 10 decreases. Details thereof
will be described hereafter.
[0013] The press-operation member 10 includes a base member 18 fixed to the circuit substrate
12 and an operating knob 20 mounted in the base member 18 in such a way as to protrude
farther on the vehicle interior side than the base member 18. The operating knob 20
corresponds to a member to be operated, which receives the pressing operation.
[0014] The base member 18 has an inside cylinder portion 22, an outside cylinder portion
24, an annular wall 26, and a plurality of mounting portions 28, and these are integrally
formed from, for example, a synthetic resin.
[0015] The inside cylinder portion 22 has a hollow cylindrical shape having a central axis
in a direction parallel to the pressing operation direction, and has a bottom wall
23 at its rear end. The inside cylinder portion 22 has guide holding portions 30,
which hold the operating knob 20, in appropriate places (in the drawings, four places
circumferentially spaced 90° from each other) on its outer peripheral surface. The
guide holding portions 30 hold the operating knob 20 in such a way that the operating
knob 20 can slide (move forward and rearward) in a direction parallel to the pressing
operation direction.
[0016] Each guide holding portion 30 has a pair of holding protrusions 32 protruding inward
from an inner peripheral surface of the inside cylinder portion 22. The paired holding
protrusions 32 extend in a direction parallel to the central axis while being spaced
a certain distance L away from each other in a circumferential direction of the inside
cylinder portion 22. That is, a space for allowing the operating knob 20 to slide
is secured between the holding protrusions 32.
[0017] Retentive pieces 34A and 34B are formed respectively in upper and lower spaces,
among the four spaces, of the inside cylinder portion 22. The retentive pieces 34A
and 34B, being for preventing the operating knob 20 coming off from the inside cylinder
portion 22, as well as extending forward from back end positions of the corresponding
spaces, each have a front end which can bend in a radial direction, and respectively
have inwardly protruding retentive protrusions 36A and 36B at the front ends (Figs.
8 and 9).
[0018] The outside cylinder portion 24, having axial dimensions smaller than those of the
inside cylinder portion 22, is formed in such a way as to encircle the inside cylinder
portion 22 all around from radially outside the inside cylinder portion 22, and a
rear end portion (to be exact, a portion slightly closer to the front side than the
rear end) of the outside cylinder portion 24 connects with an outer peripheral surface
at the rear end of the inside cylinder portion 22 via the annular wall 26 (Fig. 5).
[0019] The mounting portions 28 protrude radially outward from corresponding appropriate
places of the outer peripheral surface of the outside cylinder portion 24. A bolt
through hole 29 passing through each mounting portion 28 in an axial direction (a
direction parallel to the pressing operation direction) is provided in each mounting
portion 28. Meanwhile, bolt through holes 13 are provided in positions of the circuit
substrate 12 corresponding to the bolt through holes 29 (Fig. 3), and bolts inserted
into the corresponding two bolt through holes 29 and 13 are mounted with nuts to thereby
fix the base member 18 to the circuit substrate 12 in a condition in which the rear
end surface of the outside cylinder portion 24 is in contact with the circuit substrate
12.
[0020] The operating knob 20 is held in the base member 18 in such a way as to move rearward
(slide) in the pressing operation direction by receiving a pressing operation in the
pressing operation direction.
[0021] Specifically, the operating knob 20 has an operated plate 42 which receives a pressing
operation with a finger or the like, and a held cylinder 44 extending rearward from
the rear surface of the operated plate 42.
[0022] The held cylinder 44 has four guided portions 46A, 46B, 46C, and 46D disposed on
the top, bottom, left, and right respectively, and a plurality (herein, four) of connecting
portions 48, positioned a predetermined distance radially inwardly of the guided portions
46A, 46B, 46C, and 46D, each of which connects circumferentially mutually adjacent
guided portions.
[0023] Each guided portion 46A to 46D has a flat plate-like shape perpendicular to the radial
direction of the held cylinder 44. Then, each guided portion 46A to 46D is inserted
between the holding protrusions 32, which configures each guide holding portion 30
in the inside cylinder portion 22 of the base member 18, in a direction parallel to
the pressing operation direction to be thereby held in such a way as to be slidable
in the same direction.
[0024] Also, a rectangular through hole 45 having predetermined dimensions in a front-rear
direction of the upper and lower guided portions 46A and 46C (a direction parallel
to the pressing operation direction) is provided in each of the upper and lower guided
portions 46A and 46C, and the retentive protrusions 36A and 36B of the retentive pieces
34A and 34B of the base member 18 are fitted in the corresponding through holes 45.
The front-rear direction positions and dimensions of the through holes 45 are set
in such a way that the retentive protrusions 36A and 36B prevent the operating knob
20 from coming off from the inside cylinder portion 22 while allowing the operating
knob 20 to slide.
[0025] Furthermore, a pressing operation bar 47 (Figs. 2 and the like) extends more rearward
than the rear end of the lower guided portion 46D.
[0026] Meanwhile, stopper ribs 50 in positions corresponding to the guided portions 46A
to 46D are protruded from the front side surface of the bottom wall 23 of the inside
cylinder portion 22. In the embodiment, the ribs 50 extend in directions perpendicular
to the guided portions 46A to 46D, that is, in the radial direction, and come in contact
with the rear ends of the guided portions 46A to 46D, thereby restricting a slide
stroke of the operating knob 20. That is, the rear ends of the guided portions 46A
to 46D configure contact portions which come in contact with the ribs 50 to thereby
prevent the operating knob 20 from sliding in a direction in which it moves more rearward
than its contact position (pressing restriction position), and the ribs 50, which
come in contact with the contact portions, configure stoppers which restrict the slide.
[0027] Also, a through hole 52 for allowing the pressing operation bar 47 to pass through
the bottom wall 23 is provided in the bottom wall 23. Meanwhile, a switch element
15 which is an operation detector is provided in a position on the circuit substrate
12 corresponding to the pressing operation bar 47. The switch element 15 outputs a
detection signal by receiving the pressure of the pressing operation bar 47 when the
operating knob 20 slides in such a way as to move rearward to the pressing restriction
position.
[0028] Furthermore, as a feature of the apparatus, the rear ends of the guided portions
46A to 46C, among the rear ends of the guided portions 46A to 46D configuring the
contact portions, configure breakable portions, and the breakable portions have a
shape such that they are broken by receiving a reaction force from the ribs 50 when
the operating knob 20 receives pressure with a certain amount of force or more which
is larger than the normal pressing operation force, thereby allowing the operating
knob 20 to slide in a direction in which the operating knob 20 moves more rearward
than the pressing restriction position. Specifically, as shown in Fig. 6(a), with
a rearmost end region left in the rear end portion of each guided portion 46A to 46C,
a rectangular through hole 54 passing through each guided portion 46A to 46D is formed
in a position closer to the front side than the rearmost region, whereby the rearmost
end region is configured as a linear beam portion 56 perpendicular to each rib 50.
Then, the length and cross-sectional shape of the beam portion 56 are set in such
a way that, when a certain amount of pressing load or more is applied to the operating
knob 20, the intermediate region of the beam portion 56 is broken, as shown in an
A portion of Fig. 6 (b), by a reaction force received from the rib 50 in pressure
contact with the intermediate region.
[0029] Meanwhile, an operation side breakable portion is formed in the rear end portion
of the guided portion 46D in which the pressing operation bar 47 is provided. The
operation side breakable portion is broken by a reaction force which the pressing
operation bar 47 receives from the switch element 15 when the operating knob 20 receives
a certain amount of pressure or more. Specifically, as shown in Fig. 7, in the same
way as in the guided portions 46A to 46C, with a rearmost end region of the guided
portion 46D left in the rear end portion of the guided portion 46D, a rectangular
through hole 54D is formed in a position closer to the front side than the rearmost
end region, whereby the rearmost end region is configured as a linear beam portion
56D perpendicular to the pressing operation bar 47. Then, the length and cross-sectional
shape of the beam portion 56D are set in such a way that the intermediate region of
the beam portion 56D is broken by a reaction force received from the switch element
15 via the pressing operation bar 47 when a certain amount of pressing load or more
is applied to the operating knob 20. The break strength of the beam portion 56D is
set in such a way that a pressing load when the beam portion 56D breaks is equivalent
to a pressing load when each beam portion 56 breaks.
[0030] The operating apparatus according to the embodiment is provided with a kind of dial
operation member (rotating operation member) 60 shown in Figs. 12 and 13 in addition
to the vehicle operation member 10. The dial operation member 60, being one which
receives a rotating operation, includes a ring-like base member 62 and a dial member
(member to be operated) 64 of a ring-like shape in the same way. Also, the base member
18 is loaded with an unshown spring mechanism which makes an operator feel a click
along with a rotation of the dial operation member 60.
[0031] The base member 62 is held on the press-operation member 10 side of the base member
18 in such a way as to be rotatable around an axis the same as the central axis of
the base member 18. Specifically, a plurality of holding pieces 38 are extended forward
from the outside cylinder portion 24 of the base member 18, and the holding pieces
38 hold the base member 62 in such a way as to embrace it from radially outside.
[0032] The dial member 64 has a supported cylinder 65 supported from radially inside by
the base member 62, a dial ring 66 provided along the outer perimeter of the operated
plate 42 of the operating knob 20, and a plurality of connecting portions 68 radially
connecting the dial ring 66 and supported cylinder 65 in such a way that the dial
ring 66 and supported cylinder 65 rotate integrally. The supported cylinder 65 is
engaged with the base member 62 in such a way as to rotate integrally with the base
member 62 and move rearward to the base member 62 in a direction of the pressing force,
in the same way as the operating knob 20, when the dial member 64 receives a certain
amount of pressing force or more.
[0033] Means which allow the rearward movement of the dial member 64 are not limited. For
example, a breakable portion similar to the breakable portions of the press-operation
member 10 side (beam portions 56 and 56D) may be provided in the dial member 64, and
means may be such that the dial member 64 is held on the base member 62 so as to be
slidable in the front-rear direction, and biased to the front side by a spring or
the like, and when receiving pressure, moves rearward accompanying a compressive deformation
of the spring.
[0034] In the operating apparatus according to the invention, the dial operation member
60 is not essential. That is, the pressing operation member 10 may be used alone.
[0035] Next, an action of the operation apparatus will be described.
[0036] The operating knob 20 of the pressing operation member 10, in a condition before
it receives a pressing operation, is held in a position in which the pressing operation
bar 47 of the operating knob 20 lightly touches the switch element 15, or is spaced
away from the switch element 15. When the operating knob 20 is pressingly operated
from the position, the operating knob 20 slides in a direction in which the operating
knob 20 moves rearward in the pressing operation direction, and the pressing operation
force is applied to the switch element 15 by the pressing operation bar 47, and the
switch element 15 outputs a detection signal. At this time, each guide holding portion
30 of the base member 18 guides each guided portion 46A to 46D of the operating knob
20, thereby stabilizing the slide of the operating knob 20. Also, a rearward movement
position of the operating knob 20 is restricted to a position (the pressing restriction
position) in which the beam portions 56 at the rear ends of the guided portions 46A
to 46D come in contact with the ribs 50 on the base member 18 (Fig. 12).
[0037] On the other hand, when a certain amount of pressing force or more (a force significantly
larger than the normal pressing operation force) is applied to the operating knob
20, for example, the case where a passenger strongly presses against the operating
knob 20 or the like, due to a vehicular collision or the like, the beam portions 56
of the guided portions 46A to 46C and the beam portion 56D of the guided portion 46D
approximately simultaneously break due to the pressing force, whereby the operating
knob 20 moves more rearward from the pressing restriction position (Fig. 13). Specifically,
an intermediate region of the beam portion (breakable portion) 56 at the rear end
of each guided portion 46A to 46C receives a reaction force from each rib 50 in response
to the pressing force, while an intermediate region of the beam portion (breakable
portion on the operation side) 56D of the guided portion 46D receives a reaction force
in response to the pressing force, from the switch element 15, via the pressing operation
bar 47. These cause each beam portion to break under approximately the same conditions.
[0038] The amount of protrusion of the press-operation member 10 from the panel 14 decreases
rapidly owing to the rearward movement of the operating knob 20 accompanying the break.
Also, in the embodiment, due to the application of the pressing force, the dial ring
66 around the operating knob 20 also moves rearward to the base member 62 integrally
with the supported cylinder 65, which guarantees a rapid reduction in the amount of
protrusion of the whole operation member.
[0039] At the time of the rearward movement, a reaction force equivalent to the pressing
force applied to the operating knob 20 is applied directly to the beam portions 56
from the ribs 50 which are the stoppers of the base member 18, and the beam portions
56 break in a position on which the reaction force acts. This makes it easy to specify
a relationship between the pressing force and a break load of the beam portions 56
which are the breakable portions. Also, as the direction of rearward movement of the
operating knob 20 accompanying the break is restricted by the guide holding portions
30 of the base member 18, maldistribution of a pressing load caused by an inclination
of the operating knob 20 is unlikely to occur. These points make it easy to design
each beam portion 56 which is a breakable portion.
[0040] In particular, in the embodiment, the ribs 50 which are the stoppers of the base
member 18 and the beam portions 56 which is to come in contact with the ribs 50 are
provided respectively in a plurality of positions arranged on a plane perpendicular
to the pressing operation direction of the operating knob 20, whereby a reaction force
which the beam portions 56 receive from the ribs 50 is equalized. This makes it easier
to design the beam portions 56. Also, as the break strength of this kind of beam portion
56 can be calculated based on a general bending theory, it is easy to design the beam
portions. The same also applies to the beam portion 56D which is the breakable portion
on the operation side.
[0041] In the invention, the contact portions (in the illustrated example, the beam portions
56) do not necessarily have to be provided in portions to be pressed, and the contact
portions may be provided separately from the portions be pressed. However, that the
rear end portions of the guided portions configure the contact portions, as heretofore
described, enables a further simplification of the structure.
[0042] In particular, with respect to the pressing operation member 10 in the illustrated
example, the simple structure wherein at least the rear end portion of each guided
portion 46A to 46D is formed into a plate, and the through hole 54 is provided in
the rear end portion, makes it possible to form a beam portion 56 suitable for the
breakable portion in a portion closer to the leading end side than the through hole
54.
[0043] In the invention, the breakable portions may be included in the stoppers on the base
member side, rather than in the contact portions on the member to be operated (in
the illustrated example, the operating knob 20) side. For example, beam-like stoppers
may be formed in the base member, and the stoppers may be broken by a pressing force
received from the contact portions on the member to be operated.
Working Example
[0044] For example, in the internal protrusion regulations in China and Europe, when an
operation apparatus has a protruding object protruding 9.5mm or more from a panel,
it is required to reduce the amount of protrusion of the protruding object to 9.5mm
or less when a static load of approximately 380N acts on the protruding object. In
order to meet the requirement with the operating apparatus shown in Figs. 1 to 13,
it is sufficient to design the beam portions 56 and 56D in the following manners.
1) Break load Pf of each beam portion
[0045] In the operating apparatus, as the four beam portions 56, 56, 56, and 56D are circumferentially
equally spaced at 90° intervals, in order that the operating knob 20 moves rearward
by receiving a pressing load of 380N, it is sufficient that the beam portions are
designed in such a way that each beam portion breaks by receiving a load of 380/4=95(N),
that is, in such a way that the break load Pf of each beam portion is 95N.
2) Shape design of beam portions
[0046] When a load P acts on the intermediate regions of the beam portions 56 and 56D which
are two-end fixing beams, and taking the length of the beam portions (that is, the
width of the through holes 54) as Lb and bending moment acting on the intermediate
regions as M, a relationship between them is expressed by the following equation.
[0047] Taking the maximum bending stress of the intermediate regions of the beam portions
56 and 56D when the bending moment M in the equation acts as σ
max and the section modulus of the beam portions 56 and 56D as Z, the bending moment
M is expressed by
[0048] Herein, when the plate thickness of the guided portions 46A to 46D in which the beam
portions are formed (that is, the width of the beam portions) is taken to be t, and
the thickness of the beam portions (a distance from the rear end of each through hole
54 to the rear end of each guided portion 46A to 46D) is taken to be d
2, the section modulus Z of the beam portions 56 and 56D in the illustrated example
is expressed by
[0049] When the equation (2) and equation (3) are substituted into the equation (1), the
following equation is obtained.
[0050] Herein, as the maximum bending stress σ
max when the beam portions 56 and 56D break is determined by a material property, by
fixing the shape (L, t, and d
2) of the beam portions in such a way that P = Pf (≈ 95N) in the equation (4), it is
possible to construct an operation apparatus wherein the beam portions 56, 56, 56,
and 56D break approximately equally when the operating knob 20 receives a pressing
stress of approximately 380N.
[0051] As described above, the invention provides a vehicle press-operation member wherein
it is easy to design a breakable portion which is broken in order to reduce an amount
of protrusion from a panel when a certain amount of pressing force or more is applied,
and it is possible to increase the reliability of a reduction in the amount of protrusion
when the pressing force acts, and a vehicle operation apparatus provided with the
vehicle press-operation member. Specifically, the invention provides a vehicle press-operation
member which is provided on a panel in a vehicle interior in such a way as to protrude
on the vehicle interior side from a surface of the panel and to receive a pressing
operation, and is configured in such a way that the amount of protrusion decreases
by receiving pressure with a certain amount of force or more. The vehicle press-operation
member includes a base member mounted on the panel or a member fixed to the panel,
and a member to be operated which is mounted on the base member in such a way as to
protrude on the vehicle interior side from the base member, and receives a pressing
operation. The base member has a guide holding portion which holds, while guiding,
the member to be operated in such a way that the member to be operated slides to the
base member in a direction parallel to the pressing direction, and a stopper which
comes in contact with the member to be operated to thereby restrict the member to
be operated from sliding in a direction in which the member to be operated moves more
rearward than a predetermined pressing restriction position, and the member to be
operated has a guided portion which fits in the guide holding portion and is guided
by the guide holding portion, and a contact portion which comes in contact with the
stopper of the base member to thereby prevent the slide in the direction in which
the member to be operated moves rearward. Either of the stopper or the contact portion
configures a breakable portion having a shape such that it is broken by receiving
a pressing force from the other in the pressing direction when the member to be operated
receives pressure with a certain amount of force or more, thereby allowing a further
slide of the member to be operated in the pressing direction.
[0052] In the pressing operation member, when the member to be operated is pressed with
the normal operation force, the member to be operated slides with the pressing force
in a direction in which it moves rearward, but the slide is stopped in a position
in which the contact portion of the member to be operated and the stopper of the base
member come in contact with, thereby preventing a further rearward movement. That
is, the stopper fulfils its original function of restricting the pressing operation
stroke of the member to be operated to a stroke up to the pressing restriction position.
[0053] On the other hand, when a large pressing force is applied to the member to be operated,
for example, by the passenger of the vehicle making a strong contact with the member
to be operated or the like, the contact portion of the member to be operated makes
pressure contact with the stopper on the base member side with a pressure corresponding
to the pressing force, and the breakable portion included in the contact portion or
stopper is broken by the pressure contact. Owing to the break, the member to be operated
moves rearward toward the base member side up to a deeper position than the pressing
restriction position, whereby the amount of protrusion of the whole of the pressing
operation member from the panel decreases rapidly, and the passenger's safety is secured.
[0054] When pressing, a reaction force equivalent to the pressing force is applied to the
contact portion from the stopper of the base member, and the break occurs in that
position, thus making it easy to specify a relationship between the pressing force
and the break load of the breakable portion. Also, as a direction of rearward movement
of the member to be operated accompanying the break is fixed by the guide holding
portion, the maldistribution of the pressing load caused by an inclination of the
member to be operated is unlikely to occur. Consequently, it is easy to design the
breakable portion.
[0055] In particular, in the event that the stoppers of the base member and the contact
portions of the member to be operated are provided respectively in a plurality of
positions arranged on a plane perpendicular to the pressing direction of the member
to be operated, and so are the contact portions of the member to be operated, a break
load which each breakable portion receives from the corresponding stopper or contact
portion is equalized, thereby making it easier to design the breakable portions.
[0056] For example, the adoption of an arrangement such that the member to be operated has
the guided portions one each in a plurality of positions arranged around a specific
central axis parallel to the pressing direction of the member to be operated, and
the rear end portions of two or more of the guided portions among the guided portions
configure the contact portion, further simplifies the structure by utilizing the rear
end portions of the guided portions as the contact portions.
[0057] Also, as a specific configuration of the breakable portion, one is preferable wherein
the breakable portion, which includes a beam portion extending in a direction perpendicular
to the pressing direction of the member to be operated, and breaks by a longitudinally
intermediate region of the beam portion receiving the pressing force. With a breakable
portion including this kind of beam portion, it is possible to calculate the break
strength of the beam portion based on the general bending theory. Consequently, it
is easy to design the breakable portion.
[0058] For example, when utilizing the rear end portion of the guided portion as the contact
portion as heretofore described, a structure is preferable wherein the rear end portion
of the guided portion configuring the contact portion is formed into a plate, a through
hole passing through an end portion of the plate in a direction of the plate thickness
is provided, a portion closer to the leading end side than the through hole forms
a beam portion extending in a direction perpendicular to the pressing direction of
the member to be operated, and a longitudinally intermediate region of the beam portion
breaks by receiving the pressing force. In this structure, a beam portion suitable
for the breakable portion is formed with a simple structure wherein a through hole
is provided in a plate-like rear end portion of the guided portion.
[0059] Also, the invention is an operation apparatus, which is provided in a vehicle and
includes a panel provided in such a way as to face inside a vehicle interior, a circuit
substrate fixed to the reverse of the panel, the vehicle press-operation member which
is provided on the panel so as to be operable in such a way as to protrude on the
vehicle interior side from the surface of the panel and changes in shape in such a
way that the amount of protrusion decreases by receiving a certain amount of pressing
force or more, and an operation detector which is provided on the circuit substrate
and outputs an electrical signal when the member to be operated of the vehicle press-operation
member is operated up to the pressing restriction position, wherein the base member
of the vehicle press-operation member is fixed to the panel.
[0060] In the operating apparatus, by providing the member to be operated of the vehicle
press-operation member with a pressing operation portion which is provided in a position
differing from the contact portion and, in accordance with a pressing operation of
the member to be operated, transmits the pressing force to the operation detector,
and a breakable portion on the operation side, which breaks with a reaction force
which the press-operation portion receives from the operation detector when the member
to be operated receives a certain amount of pressure or more, the pressing operation
portion also can be utilized as a breakable portion. In this case, it is sufficient
to set the shape of the breakable portion on the operation side in such a way that
a pressing load when the breakable portion on the operation side breaks is equal to
a pressing load when the breakable portion breaks.
1. A vehicle press-operation member which is provided on a panel in a vehicle interior
in such a way as to protrude on the vehicle interior side from a surface of the panel,
and changes in shape in such a way that the amount of protrusion thereof decreases
by receiving a certain amount of force or more, comprising:
a base member mounted on the panel or a member fixed to the panel; and
a member to be operated which is mounted on the base member in such a way as to protrude
on the vehicle interior side from the base member and receives a pressing operation,
wherein
the base member has a guide holding portion which holds, while guiding, the member
to be operated in such a way that the member to be operated slides to the base member
in a direction parallel to the pressing direction, and a stopper which, by coming
in contact with the member to be operated, restricts the member to be operated from
sliding in a direction in which the member to be operated moves more rearward than
a predetermined pressing restriction position,
the member to be operated has a guided portion which fits in the guide holding portion
and is guided by the guide holding portion, and a contact portion which, by coming
in contact with the stopper of the base member, prevents the slide in the direction
in which the member to be operated moves rearward,
and
either of the stopper or the contact portion includes a breakable portion having a
shape such that it is broken by receiving a pressing force from the other in the pressing
direction when the member to be operated receives pressure with a certain amount of
force or more, thereby allowing the member to be operated to slide in a direction
in which the member to be operated moves still more rearward than the pressing restriction
position.
2. The vehicle press-operation member according to claim 1, wherein
the stoppers of the base member and the contact portions of the member to be operated
are provided respectively in a plurality of positions arranged on a plane perpendicular
to the pressing direction of the member to be operated.
3. The vehicle press-operation member according to claim 2, wherein
the member to be operated has the guided portions one each in a plurality of positions
arranged on a plane perpendicular to the pressing direction of the member to be operated,
and the rear end portions of two or more of the guided portions, among the guided
portions, configure the contact portions.
4. The vehicle press-operation member according to any one of claims 1 to 3, wherein
the breakable portion which includes a beam portion extending in a direction perpendicular
to the pressing direction of the member to be operated, wherein a longitudinally intermediate
region of the beam portion receives the pressing force to thereby break.
5. The vehicle press-operation member according to claim 3, wherein
the rear end portion of the guided portion configuring the contact portion is formed
into a plate, a through hole passing through an end portion of the plate in a direction
of the plate thickness is provided, a portion closer to the leading end side than
the through hole forms a beam portion extending in a direction perpendicular to the
pressing direction of the member to be operated, and a longitudinally intermediate
region of the beam portion breaks by receiving the pressing force.
6. A vehicle operation apparatus, which is provided in a vehicle, comprising:
a panel provided in such a way as to face inside a vehicle interior;
a circuit substrate fixed to the reverse of the panel;
the vehicle press-operation member according to any one of claims 1 to 5, which is
provided on the panel so as to be operable in such a way as to protrude on the vehicle
interior side from the surface of the panel and changes in shape in such a way that
the amount of protrusion decreases by receiving a certain amount of pressure or more;
and
an operation detector which is provided on the circuit substrate and outputs an electrical
signal when the member to be operated of the vehicle press-operation member is operated
up to the pressing restriction position, wherein
the base member of the vehicle press-operation member is fixed to the panel.
7. The vehicle operation apparatus according to claim 6, wherein
the member to be operated of the vehicle press-operation member has a pressing operation
portion which is provided in a position differing from the contact portion and transmits
the pressing force to the operation detector in accordance with a pressing operation
of the member to be operated, and an operation side breakable portion which breaks
with a reaction force, which the pressing operation portion receives from the operation
detector when the member to be operated receives a certain amount of pressure or more,
wherein the shape of the operation side breakable portion is set in such a way that
a pressing load when the operation side breakable portion breaks is equal to a pressing
load when the breakable portion breaks.