TECHNICAL FIELD
[0001] The present disclosure relates to the technical field of relays, and in particular,
to a bobbin that facilitates automatic winding, a coil, a latching relay and a movable
spring terminal limiting structure.
BACKGROUND
[0002] The bobbin of the latching relay includes three flange parts and two winding parts,
the three flange parts are sequentially distributed along the length direction of
the bobbin, and each winding part is respectively arranged between two adjacent flange
parts. Because several coil terminals of the latching relay are located on the same
flange part, it is easy to cause the start and end wires of the enameled wire to overlap
together, which is easy to form a voltage difference, causing a short circuit of the
coil and then resulting in the loss of relay function. In order to solve the above
problems, there are some technical solutions in which bridging terminals are provided
on the middle flange part, the end wire of the enameled wire is wound on the bridging
terminal and then connected to the end terminal, so that the start wire and the end
wire of the enameled wire are spaced apart. However, this way is not convenient for
automatic winding. This is because it is currently impossible to use an automatic
winding method to wind the end wire of the enameled wire on the bridge terminal, and
only a manual winding method can be used. In addition, the height difference between
the position of the bridge terminal and the position of the end terminal is large,
when the end wire of the enameled wire is led from the bridge terminal to the end
terminal, a crimping mechanism must be used to crimp the end wire between the bridge
terminal and the end terminal to reduce its height and avoid interference with the
base of the relay. However, the use of a crimping mechanism for crimping processing
is not only complicated, but also requires manual assistance.
[0003] In addition, the movable spring part of the latching relay includes a movable spring
and a movable spring terminal, which are riveted together and inserted into a cavity
provided at the bottom of the base of the latching relay. The movable spring terminal
includes a main sheet body and a lead-out pin arranged on the main sheet body, and
the main sheet body is used for riveting with the movable spring. Because there is
a certain gap between the main sheet body of the movable spring terminal and the top
surface of the cavity where it is located, when the latching relay is dropped or impacted
by an external force, the movable spring terminal is prone to shake up and down, which
affects the contact gap, contact over-travel and contact pressure, etc., so that the
consistency of the mechanical properties of the product cannot be guaranteed.
SUMMARY
[0004] According to one aspect of the present disclosure, a bobbin that facilitates automatic
winding, a coil, a latching relay are provided.
[0005] The technical solutions adopted by the present disclosure to solve its technical
problems are as follows: A bobbin that facilitates automatic winding includes a first
flange part, a second flange part, a third flange part, a first winding part and a
second winding part, the first flange part, the second flange part and the third flange
part is sequentially distributed along a length direction of the bobbin, the first
winding part is provided between the first flange part and the second flange part,
the second winding part is provided between the second flange part and the third flange
part; the first flange part is provided with a plurality of terminal holes, the plurality
of terminal holes includes a first terminal hole for inserting a start terminal and
a second terminal hole for inserting an end terminal, the first flange part is provided
with a wire hanging portion, and a bottom end of the wire hanging portion is lower
than a top end of the first flange part, and the second flange part is provided with
a first wire guide portion for guiding a enameled wire from the second winding part
to the wire hanging portion.
[0006] Further, the first flange part is provided with a groove which is located at an inner
side of a part where the second terminal hole is located, the groove is configured
to penetrate both sides of the first flange part in a thickness direction thereof;
and the wire hanging portion is located on a groove wall of the groove at a side close
to the second terminal hole.
[0007] Further, the wire hanging portion is an upside-down boss, a bottom end of the upside-down
boss is higher than a bottom end of the groove wall where the upside-down boss is
located.
[0008] Further, a bottom surface of the upside-down boss is an inclined plane, and an end
of the inclined plane connected to the groove wall where the upside-down boss is located
is a higher end, the other end of the inclined plane away from the groove wall where
the upside-down boss is located is a lower end; an enameled wire introduction port
with a wide top and a narrow bottom is formed between the upside-down boss and a groove
wall on the other side of the groove.
[0009] Further, the first wire guide portion is a wire guide groove, the wire guide groove
is open at one end close to the second winding part, a bottom surface of the wire
guide groove is an inclined surface, and a lower end of the inclined surface is close
to the second winding part and is provided with a rounded corner, a higher end of
the inclined surface is close to the first winding part.
[0010] Further, the bottom surface of the wire guide groove is provided with a protruding
column extending upward, an end of the wire guide groove close to an outside of the
second flange part is open, the protruding column is located at the end of the wire
guide groove.
[0011] Further, one end of the wire guide groove close to the first winding part is provided
with a rib extending along a width direction of the bobbin, a top end of the rib is
higher than a height of the enameled wire after being wound on the first winding part;
the rib and a higher end of the bottom surface of the wire guide groove are in a circular
arc transition.
[0012] Further, the plurality of terminal holes further comprises a third terminal hole
for inserting a common terminal, the third terminal hole is located between the first
terminal hole and the second terminal hole.
[0013] Further, the first flange part is provided with a plurality of vent holes, the plurality
of terminal holes are respectively communicated with at least one vent hole.
[0014] Further, the plurality of terminal holes are respectively arranged up and down corresponding
to corresponding vent holes, and an aperture of the vent hole is smaller than an aperture
of a terminal hole.
[0015] Further, the second flange part is provided with a second wire guide portion for
guiding the enameled wire from the first winding part to the second winding part,
the second wire guide portion is an oblique retaining wall; a side of the first flange
part facing the first winding part is provided with a first wire passing notch and
a second wire passing notch, the first wire passing notch and the second wire passing
notch are located at opposite sides of the first winding part; a side of the second
flange part facing the second winding part is provided with a third wire passing notch
corresponding to the second wire guide portion; the second flange part is provided
with a magnetic steel slot, the magnetic steel slot is connected to an core mounting
hole penetrating the first flange part, the second flange part, the third flange part,
the first winding part and the second winding part; two limiting bosses are respectively
provided on both sides of the magnetic steel slot, and the two limiting bosses are
respectively provided with arc-shaped notches that cooperate with a rotating shaft
of an armature.
[0016] According to another aspect of the present disclosure, a coil is provided. The coil
includes an enameled wire, a plurality of terminals and bobbin that facilitates automatic
winding of the present disclosure as described above, each terminal is inserted into
a cooperating terminal hole, the enameled wire is started from a terminal inserted
into a first terminal hole, and is guided to a wire hanging portion through a wire
guide groove after being wound, and is connected to a terminal inserted into a second
terminal hole after an wire is hung on the wire hanging portion.
[0017] According to another aspect of the present disclosure, a latching relay is provided.
The latching relay includes the coil of the present disclosure described above.
[0018] Compared with related art, the present disclosure has the following beneficial effects.
- 1. The present disclosure adopts the first wire guide portion instead of the bridge
terminal to avoid manual winding of enameled wire, and reduce costs and avoid wire
disconnection, at the same time, the present disclosure is provided with a wire hanging
portion on the first flange part, the bottom end of the wire hanging portion is lower
than the top end of the first flange part, the wire hanging portion is used to hang
the wire to reduce the height of the end wire part of the enameled wire located between
the first flange part and the second flange part, thereby avoiding the use of a wire
crimping mechanism to perform crimping processing. At the same time, an effective
isolation between the enameled wire layers of the second winding part and the first
winding part can be ensured, and the risk of interlayer breakdown can be avoided.
Therefore, the bobbin of the present disclosure is convenient to realize automatic
winding and greatly improves the winding efficiency.
- 2. The present disclosure further provides the groove, the wire hanging portion is
located on the groove wall of the groove at the side close to the second terminal
hole, which not only does not affect the automatic wire hanging, but also prevents
the wire hanging portion from being located at the periphery of the first flange part
and interfering with the base of the relay.
- 3. The wire hanging portion is preferably an upside-down boss, so that its structure
is very simple. In particular, a bottom surface of the upside-down boss is an inclined
plane, and the end of the inclined plane connected to the groove wall where the upside-down
boss is located is the higher end, the other end of the inclined plane away from the
groove wall where the upside-down boss is located is the lower end, which is beneficial
to tilt the enameled wire to the side where the second terminal hole is located after
being hung on the upside-down boss, so as to prevent the enameled wire from falling
out of the upside-down boss; the enameled wire introduction port facilitates the introduction
of the enameled wire for hanging upside down at the bottom of the upside-down boss.
- 4. The first wire guide portion is a wire guide groove, the bottom surface of the
wire guide groove is an inclined surface, which is convenient for guiding the enameled
wire and reducing the tension of the enameled wire, so that the enameled wire is more
difficult to break.
- 5. The arrangement of the protruding column can not only restrict the enameled wire
from coming out of the wire guide groove, but also can be used as a winding fixing
point of the enameled wire when needed.
- 6. The arrangement of the vent holes 19 can allow the heated and expanded air in the
terminal holes to circulate freely with the outside of the terminal hole when the
start terminal, the common terminal and the end terminal are heated with tin, so as
to avoid air expansion in the terminal holes and affect the initial plug-in position
of the terminal, which may cause problems such as terminal skew and change in the
length of the terminal.
- 7. Each vent hole is arranged up and down corresponding to the corresponding vent
hole, and the aperture of the vent hole is smaller than the aperture of the terminal
hole, so that the vent hole can be easily formed without causing the corresponding
terminal to fall out.
[0019] According to another aspect of the present disclosure, a movable spring terminal
limiting structure and a latching relay are provided.
[0020] The technical solutions adopted by the present disclosure to solve its technical
problems are as follows: a movable spring terminal limiting structure of the present
disclosure includes a base of the relay and a movable spring terminal, the bottom
of the base is provided with a first cavity, the movable spring terminal is inserted
into the first cavity from a side of the base; the movable spring terminal 200 includes
a lead-out pin and a main sheet body for connecting with the movable spring, the lead-out
pin is provided at the main sheet body; the main sheet body is provided with a limiting
portion, the base is provided with a limiting slot, the limiting slot is in communication
with the first cavity; the limiting portion is inserted into the limiting slot along
the insertion direction of the movable spring terminal, so that the limiting portion
is not move up and down.
[0021] Further, the first cavity is provided with a boss for supporting the main sheet body,
the lead-out pin is located outside the boss and its bottom end extends below the
base; the limiting portion and the tail of the movable spring connected to the main
sheet body are located on the same side of the main sheet body, the limiting portion
extends downward and bend, the bottom surface of the limiting slot is lower than the
boss.
[0022] Further, the limiting portion is in a shape of "Z", and the higher end of the limiting
portion is connected to the main sheet body, the bottom end of the limiting portion
faces the middle of the first cavity; the shape of the limiting slot is adapted to
the shape of the limiting portion, or, the limiting slot is in a shape of "L", and
the width of the vertical portion thereof is greater than or equal to the width of
the top of the limiting portion
[0023] Further, the corners of the limiting portion are respectively designed as rounded
corners, the top of the ends of the main sheet body and the limiting portion are respectively
provided with chamfers; the top surface of the boss is provided with a relief groove,
and the relief groove is far away from the limiting slot, an end of the top surface
of the boss close to the lead-out pin is provided with a chamfer.
[0024] Further, the lead-out pin is L-shaped, and its horizontal portion is connected to
the main sheet body, and its vertical portion extends downward; the first cavity is
provided with a retaining wall located at an inner side of the lead-out pin, the retaining
wall is provided with a limiting protrusion for limiting the movement of the lead-out
pin upward and/or toward the middle of the first cavity; the limiting protrusion is
an L-shaped limiting rib fitted at the outer corner of the lead-out pin; the limiting
slot is located between the boss and the retaining wall.
[0025] Further, the movable spring terminal is inserted into the first cavity from the side
of the base in the width direction, the limiting portion is located at one end of
the main sheet body in the length direction of the base, the lead-out pin is arranged
at one end of the main sheet body in the width direction of the base, and is fitted
to the opening of the first cavity into which the movable spring terminal is inserted.
[0026] Further, the first cavity is provided with a blocking portion, the blocking portion
abuts against the side surface of the other end of the main sheet body in the length
direction of the base; the blocking portion cooperates with the limiting slot to limit
the degree of freedom of the main sheet body and the limiting portion in the length
direction of the base 1; an end of the blocking portion close to the lead-out pin
is chamfered, the blocking portion is a baffle or a barrier strip.
[0027] Further, the top surface of the first cavity is provided with a pressure contact
portion, the bottom end of the pressure contact portion abuts the top surface of the
other end of the main sheet body in the length direction of the base; the pressure
contact portion is a pressure plate or a pressure strip.
[0028] Further, the side surface of the main sheet body at the other end in the length direction
of the base is provided with a plurality of snap-fit barbs, the corner of each snap-fit
barb is respectively arranged as rounded corner; a process notch is provided at one
end of the main sheet body where the lead-out pin are provided; the main sheet body
is provided with a plurality of riveting holes or riveting columns for riveting with
the movable spring; the base is also provided with a second cavity for mounting the
magnetic circuit part of the relay.
[0029] According to another aspect of the present disclosure, a latching relay is provided,
the latching relay includes a movable spring terminal limiting structure of the present
disclosure described above.
[0030] Compared with related art, the present disclosure has the following beneficial effects.
- 1. The main sheet body of the present disclosure is provided with a limiting portion
which is inserted into the cooperating limiting slot of the base, and can't move up
and down, thereby limiting the degree of freedom of the main sheet body of the movable
spring terminal in the up and down direction, preventing the main sheet body of the
movable spring terminal from shaking up and down when the latching relay is dropped
or impacted by an external force, and helping to improve the consistency of the product's
mechanical properties.
- 2. The limiting portion and the tail of the movable spring connected to the main sheet
body are located on the same side of the main sheet body, the limiting portion extends
downward and bend, the bottom surface of the limiting slot is lower than the boss,
which can prevent the limiting portion from limiting the movable spring connected
to the main sheet body or interfering with the movable spring connected to the main
sheet body, thereby avoiding affecting the elasticity of the movable spring and also
ensuring that the movable spring has sufficient space for movement.
- 3. The limiting portion is in a shape of "Z", and thus has the characteristics of
easy forming, easy insertion, and good limiting effects in up and down direction.
- 4. The corners of the limiting portion are respectively designed as rounded corners,
the top of the ends of the main sheet body and the limiting portion away from the
lead-out pin are respectively provided with chamfers, so as to avoid scraping and
generating plastic scraps when the movable spring terminal 200 is installed in the
base 1.
- 5. The arrangement of the retaining wall and its limiting protrusion can limit the
lead-out pin and prevent the lead-out pin from being forced during the product production
process and product application process to cause changes in the relevant mechanical
parameters of the relay product and affecting the performance of the relay.
- 6. The blocking portion abuts against the other side surface of the main sheet body
in the length direction of the base, and cooperate with the limiting slot to limit
the degree of freedom of the main sheet body and the limiting portion in the length
direction of the base, so that the technical solution of the present disclosure can
limit the degree of freedom of the main sheet body of the movable spring terminal
in the length direction of the base, prevent the main sheet body of the movable spring
terminal from lateral shaking when the latching relay is dropped or impacted by an
external force, and help to improve the consistency of the product's mechanical properties.
- 7. The arrangement of the pressure contact portion 116 is combined with the cooperation
of the limiting portion and the limiting slot, which achieves bilateral limiting of
the main sheet body 210 in the up and down direction, and greatly improves the limiting
effect of the main sheet body in the up and down direction, thereby helping to further
improve the consistency of the mechanical properties of the product.
[0031] The disclosure will be further described in detail below in conjunction with the
drawings and embodiments. However, the bobbin that facilitates automatic winding,
the coil, the a movable spring terminal limiting structure and the latching relay
of the present disclosure are not limited to the embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
[0032]
FIG. 1 is a first structural diagram of the bobbin of the present disclosure.
FIG. 2 is a second structural diagram of the bobbin of the present disclosure.
FIG. 3 is a third structural diagram of the bobbin of the present disclosure.
FIG. 4 is a side view of the bobbin of the present disclosure.
FIG. 5 is a front view of the bobbin of the present disclosure.
FIG. 6 is a first schematic diagram of the bobbin of the present disclosure being
wound in a single-coil winding manner.
FIG. 7 is a second schematic diagram of the bobbin of the present disclosure being
wound in a single-coil winding manner.
FIG. 8 is a third schematic diagram of the bobbin of the present disclosure being
wound in a single-coil winding manner.
FIG. 9 is a first schematic diagram of the bobbin of the present disclosure being
wound in a double-coil winding manner.
FIG. 10 is a second schematic diagram of the bobbin of the present disclosure being
wound in a double -coil winding manner.
FIG. 11 is a third schematic diagram of the bobbin of the present disclosure being
wound in a double -coil winding manner.
FIG. 12 is a fourth schematic diagram of the bobbin of the present disclosure being
wound in a double -coil winding manner.
FIG. 13 is a fifth schematic diagram of the bobbin of the present disclosure being
wound in a double -coil winding manner.
FIG. 14 is a front view of the coil of the present disclosure.
FIG. 15 is an exploded schematic diagram of the movable spring terminal limiting structure
of the present disclosure.
FIG. 16 is a schematic diagram of the three-dimensional structure of the movable spring
terminal of the present disclosure.
FIG.17 is a top view of the movable spring terminal of the present disclosure.
FIG. 18 is an A-A cross-sectional view of the movable spring terminal of the present
disclosure.
FIG.19 is a schematic diagram of the three-dimensional structure of the base of the
present disclosure.
FIG. 20 is a front view of the base of the present disclosure.
FIG. 21 is a cross-sectional view of the base of the present disclosure.
FIG. 22 is a schematic diagram of the three-dimensional structure of the movable spring
terminal of the present disclosure after the movable spring terminal is installed
in the base.
FIG. 23 is a cross-sectional view of the movable spring terminal limiting structure
of the present disclosure after the movable spring terminal is installed in the base.
DETAILED DESCRIPTION
The first embodiment
[0033] Please refer to FIG. 1 to FIG. 14, a bobbin of the present disclosure that facilitates
automatic winding includes a first flange part 1, a second flange part 2, a third
flange part 3, a first winding part 4 and a second winding part 5, the first flange
part 1, the second flange part 2 and the third flange part 3 are sequentially distributed
along the length direction Y of the bobbin, the first winding part 4 is provided between
the first flange part 1 and the second flange part 2, the second winding part 5 is
provided between the second flange part 2 and the third flange part 3, the first flange
part 1 is provided with a plurality of terminal holes, and the plurality of terminals
are distributed along the width direction X of the bobbin, the plurality of terminal
holes include a first terminal hole 11 for inserting a start terminal, a second terminal
hole 13 for inserting an end terminal, and a third terminal hole 12 for inserting
a common terminal, the third terminal hole 12 is located between the first terminal
hole 11 and the second terminal hole 13. In other embodiments, the plurality of terminal
holes includes the first terminal hole and the second terminal hole, but does not
include the third terminal hole. The first flange part 1 is provided with a wire hanging
portion, and the bottom end of the wire hanging portion is lower than the top end
of the first flange part 1, and the second flange part 2 is provided with a first
wire guide portion for guiding the enameled wire from the second winding part 5 to
the wire hanging portion.
[0034] In the embodiment, as shown in FIG. 1, the first flange part 1 is provided with a
groove 15 which is located at the inner side of the part where the second terminal
hole 13 is located, the groove 15 penetrates both sides of the first flange part 1
in the thickness direction thereof, and the wire hanging portion is located on the
groove wall of the groove 15 at the side close to the second terminal hole 13. Specifically,
the groove 15 is located between the second terminal hole 13 and the third terminal
hole 12. When the first flange portion only includes the first terminal hole and the
second terminal hole, the groove is located between the first terminal hole and the
second terminal hole.
[0035] In the embodiment, as shown in FIG. 1 and FIG. 4, the wire hanging portion is an
upside-down boss 14, the bottom end of the upside-down boss 14 is higher than the
bottom end of the groove wall where it is located. A bottom surface 141 of the upside-down
boss 14 is an inclined plane, and the end of the inclined plane connected to the groove
wall where the upside-down boss 14 is located is the higher end, the other end of
the inclined plane away from the groove wall where the upside-down boss 14 is located
is the lower end, as shown in FIG. 4, the angle α between the inclined plane and the
vertical direction is 70°-80°. As shown in FIG. 1, an enameled wire introduction port
16 with a wide top and a narrow bottom is formed between the upside-down boss 14 and
the groove wall on the other side of the groove 15 to facilitate the introduction
of enameled wires 7. As shown in FIG. 4, the width W1 of the upside-down boss 14 is
smaller than the width W2 of the groove 15.
[0036] In the embodiment, as shown in FIG. 1, the first wire guide portion is a wire guide
groove 21, but is not limited to this, in other embodiments, the first wire guide
portion is a wire retaining wall or a wire rib or the like. The wire guide groove
21 is open at one end close to the second winding part 5, the bottom surface of the
wire guide groove 21 is an inclined surface, and the lower end of the inclined surface
is close to the second winding part 5 and is provided with a rounded corner, the higher
end of the inclined surface is close to the first winding part 4. The bottom surface
of the wire guide groove 21 is provided with a protruding column 22 extending upward,
the end of the wire guide groove 21 close to the outside of the second flange part
2 is open, the protruding column 22 is integrally formed with the second flange part
2 and is located at the end of the wire guide groove 21. As shown in FIGS. 4 and 5,
the height difference a2 between the top end of the protruding column 22 and the top
end of the first flange part 1 is greater than the height difference a1 between the
bottom end of the upside-down boss 14 and the top end of the first flange part 1,
which can prevent the enameled wire at the end terminal and the enameled wire at the
common terminal from being overlapped when the enameled wires are wound by using the
double-coil method, so as to avoid when the coil is powered off, the reverse voltage
breaks down the overlap portion (when the wires at the end terminal and the common
terminal are overlapped together, it is easy to form a voltage difference), resulting
in a short circuit of the coil and loss of the relay function. As shown in FIG. 1,
one end of the wire guide groove 21 close to the first winding part 4 is provided
with a rib 23 extending along the width direction X of the bobbin, the top end of
the rib 23 is higher than the height of the enameled wire 7 after being wound on the
first winding part 4; the rib 23 and the higher end of the bottom surface of the groove
are in a circular arc transition.
[0037] In the embodiment, as shown in FIG. 3, the first flange part 1 is provided with a
plurality of vent holes 19, the three terminal holes (that is, the first terminal
hole 11, the second terminal hole 13 and the third terminal hole 12) are respectively
communicated with at least one vent hole 19. The number of the vent holes 19 is specifically
three, and the three vent holes 19 correspond to the three terminal holes one by one,
the three terminal holes are respectively arranged up and down corresponding to the
corresponding vent holes 19, and the aperture of the vent hole 19 is smaller than
the aperture of the terminal hole. Specifically, the portion where the vent hole 19
is located is opposite to the portion where the terminal hole is located. In other
embodiments, the vent hole is located on the side of the first flange part. The arrangement
of the vent holes 19 can allow the heated and expanded air in the terminal holes to
circulate freely with the outside of the terminal holes when the start terminal, the
common terminal and the end terminal are heated with tin, so as to avoid air expansion
in the terminal holes and affect the initial plug-in position of the terminal, which
may cause problems such as terminal skew and change in the length of the terminal.
[0038] In the embodiment, as shown in FIG. 2, the second flange part 2 is provided with
a second wire guide portion for guiding the enameled wire from the first winding part
4 to the second winding part 5, the second wire guide portion is an oblique retaining
wall 25, and the oblique retaining wall 25 forms a certain angle with the center line
of the bobbin, the oblique retaining wall 25 and the wire guide groove 21 are distributed
along the width direction X of the bobbin.
[0039] In the embodiment, as shown in FIGS. 1 and 2, the side of the first flange part 1
facing the first winding part 4 is provided with a first wire passing notch 17 and
a second wire passing notch 18, the first wire passing notch 17 and the second wire
passing notch 18 are located at opposite sides of the first winding part 4. The side
of the second flange part 2 facing the second winding part 5 is provided with a third
wire passing notch 24 corresponding to the second wire guide portion. The second flange
part 2 is provided with a magnetic steel slot 26 which is located on the bottom surface
of the second flange part 2, the magnetic steel slot 26 is connected to an core mounting
hole 16 penetrating the first flange part 1, the second flange part 2, the third flange
part 3, the first winding part 4 and the second winding part 5. Two limiting bosses
27 are respectively provided on both sides of the magnetic steel slot 26, and the
two limiting bosses 27 are respectively provided with arc-shaped notches 271 that
cooperate with the rotating shaft of the armature.
[0040] The bobbin that facilitates automatic winding of the present disclosure, when winding
the wire on the bobbin, either a single-coil winding method or a double-coil winding
method can be used. When a single-coil winding method is performed, it is only necessary
to insert the start terminal 8 and the end terminal 9 into the terminal holes on both
sides of the first flange part 1 (that is, the first terminal hole 11 and the second
terminal hole 13), respectively. As shown in FIGS. 6-8, the enameled wire 7 is started
from the start terminal 8, and after passing through the first wire passing notch
17 and completing the winding of the first set of coil 71 at the first winding part
4, the enameled wire 7 is directly entered the third wire passing notch 24 along the
oblique retaining wall 25, and then the winding of the second set of coils 72 at the
second winding part 5 is completed; then, the enameled wire 7 is climbed from the
lower end to the higher end of the bottom surface of the wire guide groove 21 at the
inner side of the protruding column 22, and then is guided straight across the rib
23 to the bottom of the upside-down boss 14. After being hung on the upside-down boss
14, the enameled wire 7 is pulled up to the end terminal 9, and is wound clockwise
on the end terminal 9 for 2-3 turns to complete the single-coil winding.
[0041] When a double-coil winding method is performed, in additional to the start terminal
8 and the end terminal 9 are inserted into the terminal holds (i.e., the first terminal
hole 11 and the second terminal hole 13) on both sides, the common terminal 10 is
also inserted into the middle terminal hole (i.e., the third terminal hole 12). As
shown in FIGS. 9-13, the enameled wire 7 is started from the start terminal 8, and
after passing through the first wire passing notch 17 and completing the winding of
the first set of coils 71 at the first winding part 4, the enameled wire 7 is returned
to the common terminal 10 and is wound clockwise on the common terminal 10 for 2-3
turns, then is returned to the first winding part 4 along the second wire passing
notch 18, after being wound a few turns on the first winding part 4 at a relatively
large interval, the enameled wire 7 is entered the third wire passing notch 24 along
the oblique retaining wall 25, then the winding of the second set of coil 72 in the
second winding part 5 is completed; then the enameled wire 7 is climbed from the lower
end to the higher end of the bottom surface of the wire guide groove 21 at the inner
side of the protruding column 22, and is guided straight across the rib 23 to the
bottom of the upside-down boss 14. After being hung on the upside-down boss 14, the
enameled wire 7 is pulled up to the end terminal 9, and is wound clockwise on the
end terminal 9 for 2-3 turns to complete the double-coil winding.
[0042] Regardless of whether it is a single-coil or double-coil winding method, the top
end of the rib 23 is higher than the height of the first set of coils 71, which can
avoid the spanned enameled wire 73 and the enameled wire of the first set of coils
71 from touching and overlapping together, as shown in FIG. 14, so as to avoid when
the coil is powered off, the reverse voltage breaks down the overlap portion (when
the wires at the start and end terminals are overlapped together, it is easy to form
a voltage difference), resulting in a short circuit of the coil and loss of the relay
function.
[0043] The bobbin that facilitates automatic winding of the present disclosure adopts the
first wire guide portion instead of the bridge terminal to avoid manual winding of
enameled wire, at the same time, the wire hanging portion is used to hang the wire
to reduce the height of the end wire part of the enameled wire (that is, the spanned
enameled wire 73) located between the first flange part and the second flange part,
thereby avoiding the use of a wire crimping mechanism to perform crimping processing.
At the same time, an effective isolation between the enameled wire layers of the second
winding part and the first winding part can be ensured, and the risk of interlayer
breakdown can be avoided, Through the design of the bobbin structure, the present
disclosure can reduce the potential failure risk during the winding process, and can
better guide the fixing and limiting of the enameled wire 7, so as to facilitate the
realization of automatic winding.
[0044] Please refer to FIGS. 1-14, a coil provided by the present disclosure includes an
enameled wire 7 and several terminals. The several terminals specifically include
a start terminal 8, a common terminal 10 and an end terminal 9. The coil of the present
disclosure also includes a bobbin that facilitates automatic winding as described
in the present disclosure, and the common terminal 10 can be selectively inserted
into the middle terminal hole (that is, the third terminal hole 12), the start terminal
8 and the end terminal 9 are respectively inserted into the other two terminal holes
(namely, the first terminal hole 11 and the second terminal hole 13), the enameled
wire 7 is started from the start terminal 8 and is wound by a single-coil winding
method or a double-coil winding method, and is led to the wire hanging portion by
the wire guide groove 21, and connected to the end terminal 9 after the wire is hooked
in the wire hanging portion. The common terminal 10 can be selectively inserted into
the middle terminal hole 12, which means that when a single-coil winding method is
adopted, only the terminal holes 11, 13 on both sides of the first flange portion
1 need to be inserted into the start terminal 8 and the end terminal 9 respectively,
and the middle terminal hole 12 does not need to be inserted into the common terminal
10; when the double-coil winding method is adopted, the three terminals 11, 12, and
13 of the first flange part 1 are respectively inserted into the start terminal 8,
the common terminal 10, and the end terminal 9 respectively.
[0045] The coil of the present disclosure can adopt a single-coil winding method or a double-coil
winding method. The two coil winding methods are as described above, and will not
be repeated here. When the plurality of terminal holes of the first flange part only
includes the first terminal hole and the second terminal hole, but does not include
the third terminal hole, the several terminals only include the start terminal and
the end terminal, and do not include the common terminal, in this case, the present
disclosure can only adopt the single-coil winding method.
[0046] A latching relay disclosed in the present disclosure includes the coil of the present
disclosure as described above.
The second embodiment
[0047] Please refer to FIGS. 15-23, a movable spring terminal limiting structure of the
present disclosure includes a base 100 of the relay and a movable spring terminal
200, the bottom of the base 1 is provided with a first cavity 110, and the first cavity
110 is provided with an opening to the outside in the width direction W of the base
100, the movable spring terminal 200 is inserted into the first cavity 110 from the
side of the base 100. Specifically, the movable spring terminal 200 is inserted into
the first cavity 110 from the side of the base 100 in the width direction W. The base
100 and the movable spring lead-out sheet 200 are specifically the base and movable
spring lead-out sheet of a magnetic latching relay, but are not limited thereto. The
base 100 is also provided with a second cavity 120 for mounting the magnetic circuit
part of the relay, and the second cavity 120 and the first cavity 110 are substantially
arranged up and down. The movable spring terminal 200 includes a lead-out pin 220
and a main sheet body 210 for connecting with the movable spring 300, the lead-out
pin 220 is provided at one end of the main sheet body 210 in the width direction of
the base 100, the lead-out pin 220 is fitted in the opening of the first cavity 110
for the movable spring terminal 200 to be inserted. One end of the main sheet body
210 in the length direction Z of the base 100 is provided with a limiting portion
230, the limiting portion 230 and the tail of the movable spring 300 connected to
the main sheet body 210 are located at the same side of the main sheet body 210; the
bottom of the base 100 is also provided with a limiting slot 112 communicating with
the outside along the width direction W of the base 100, the limiting slot 112 is
in communication with the first cavity 110; the limiting portion 230 is inserted into
the limiting slot 112 along the insertion direction of the movable spring terminal
200, so that the limiting portion is not move up and down.
[0048] In the embodiment, the first cavity 110 is provided with a boss 111 for supporting
the main sheet body 210, the lead-out pin 220 is located outside the boss 111 and
its bottom end extends below the base 100. The limiting portion 230 extends downward
and is bent, and the bottom surface of the limiting slot 112 is lower than the boss
111.
[0049] In the embodiment, as shown in FIG. 16, the limiting portion 230 is in a shape of
"Z", and the higher end of the limiting portion 230 is connected to the main sheet
body 210, the bottom end of the limiting portion 230 faces the middle of the first
cavity 110, and the width at the top of the limiting portion 230 is smaller than the
width at the bottom. As shown in FIGS. 17 and 18, the bending angles α and β at the
upper and lower positions of the limiting portion 230 are both 90°, the bending angles
α and β at the upper and lower positions of the limiting portion 230 are both 90°,
the sum of the width of the top of the limiting portion 230 and the width of the main
sheet body 210 is ci, the height of the vertical portion of the limiting portion 230
is bi, and the width of the bottom of the limiting portion 230 is L1. aand β can be
adjusted according to the adaptability of the key dimensions ci and bi and the manufacturability
of the parts, so as to obtain a better relative position for fixing the movable spring
terminal 200. The limiting slot 112 is L-shaped, and the width of the vertical portion
thereof is slightly larger than the width of the top of the limiting portion 230,
the width L2 of the bottom of the limiting slot 112 is slightly larger than the width
L1 of the bottom of the limiting portion 230, so that the bottom of the limiting portion
230 can be completely accommodated, in the case of a better molding process, the limitation
of the degree of freedom is not affected. As shown in FIG. 21, the height difference
between the upper end of the horizontal part of the limiting slot 112 and the top
surface of the boss 111 is b2, which is adapted to the bi. In other embodiments, the
shape of the limiting slot is adapted to the shape of the limiting portion. The shape
of the limiting portion 230 is not limited to the shape of "Z".
[0050] In the embodiment, as shown in FIG. 18, the corners of the limiting portion 230 are
respectively designed as rounded corners, the top of the ends of the main sheet body
210 and its limiting portion 230 located in the length direction of the base 100 and
away from the lead-out pin 220 are respectively provided with chamfers 214. In this
way, it is possible to avoid scraping and generating plastic scraps when the movable
spring terminal 200 is installed in the base 1.
[0051] In the embodiment, as shown in FIG. 16, the lead-out pin 220 is L-shaped, and its
horizontal portion is connected to the main sheet body 210, and its vertical portion
extends downward; as shown in FIG. 19, the first cavity 110 is provided with a retaining
wall 113 located at the inner side of the lead-out pin 220 to restrict the lead-out
pin 220 from moving to the inside of the first cavity 110, the retaining wall 113
is provided with a limiting protrusion for limiting the movement of the lead-out pin
220 upward and/or toward the middle of the first cavity 110. The limiting protrusion
is specifically an L-shaped limiting rib 114 fitted at the outer corner of the lead-out
pin 220, but it is not limited thereto. The limiting slot 112 is located between the
boss 111 and the retaining wall 113. The top surface of the horizontal portion of
the lead-out pin 220 is provided with two notches, the notch 221 on the left side
is semicircular, which is convenient for mold forming with a 90° bending angle, the
notch 222 on the right is rectangular and is used to fit the retaining wall 113 of
the base 1.
[0052] In the embodiment, as shown in FIGS. 19-23, the first cavity 11 is provided with
a blocking portion 115 on the side surface of one end in the length direction Z of
the base 1, the blocking portion 115 abuts against the side surface of the other end
of the main sheet body 210 in the length direction Z of the base 1; the blocking portion
115 cooperates with the limiting slot 112 to limit the degree of freedom of the main
sheet body 210 and its limiting portion 230 in the length direction of the base 1,
specifically, as shown in FIG. 21, the distance between the blocking portion 115 and
the right side wall of the vertical portion of the limiting groove 112 is C2, which
is adapted to the ci, thereby restricting the degree of freedom of the main sheet
body 210 and the limiting portion 230 in the length direction Z of the base 1. An
end of the blocking portion 115 close to the lead-out pin 220 is chamfered, so that
the main sheet body 210 of the movable spring terminal 200 can smoothly enter the
first cavity 110. The blocking portion 115 is a baffle or a barrier strip.
[0053] In the embodiment, as shown in FIG. 19, the top surface of the boss 111 is provided
with a relief groove 117 at one end in the length direction Z of the base 100, and
the relief groove 117 is far away from the limiting slot 112. The relief groove 117
can make way for the position of the burr of the movable spring terminal 200 to reduce
the occurrence of plastic debris from scraping the base 100 by the burr surface. An
end of the top surface of the boss 111 in the width direction W of the base and close
to the lead-out pin 220 is provided with a chamfer 1111, so that the main sheet body
210 of the movable spring lead-out sheet 200 can smoothly enter the first cavity 110.
In the embodiment, the top surface of the first cavity 110 is provided with a pressure
contact portion 116 located above the boss 111, the bottom end of the pressure contact
portion 116 abuts the top surface of the other end of the main sheet body 210 in the
length direction Z of the base 100; The pressure contact portion 116 is a pressure
plate or a pressure strip.
[0054] In the embodiment, as shown in FIG. 16, the side surface of the main sheet body 210
at the other end in the length direction Z of the base 100 is provided with a plurality
of snap-fit barbs 211, the corner of each snap-fit barb 211 is respectively arranged
as rounded corner to reduce the generation of foreign matter (plastic scraps) during
insertion. A process notch 212 is provided at one end of the main sheet body 210 where
the lead-out pin 220 are provided. The process notch 212 serves as the action point
of the manipulator when the movable spring lead-out sheet 200 is installed in the
base 100. The main sheet body 210 is provided with a plurality of riveting columns
213 for riveting with the movable spring 300, and the plurality of riveting posts
213 are distributed along the width direction W of the base 100. The number of the
riveting columns 213 is specifically two, but it is not limited thereto. The riveting
columns 213 can be replaced by riveting holes.
[0055] When the movable spring terminal limiting structure of the present disclosure is
installed, after the main sheet body 210 of the movable spring terminal 200 is connected
to the movable spring 300, the whole is inserted from the corresponding position of
the opening of the first cavity 110 of the base, so that the movable spring lead-out
sheet 200 and the movable spring 300 are limited in the first Cavity 110. During the
installation process, as the main sheet body 210 is inserted into the first cavity
110, its limiting portion 230 is also inserted into the limiting slot 112, thereby
limiting the degree of freedom of the main sheet body of the movable spring lead-out
sheet 200 in the up and down direction, preventing the main sheet body 210 of the
movable spring terminal 200 from shaking up and down when the magnetic latching relay
is dropped or impacted by an external force, and helping to improve the consistency
of the product's mechanical properties. The pressure contact portion 116 is combined
with the cooperation of the limiting portion 230 and the limiting slot 112, which
achieves bilateral limiting of the main sheet body 210 in the up and down direction,
and greatly improves the limiting effect of the main sheet body 210 in the up and
down direction, thereby helping to further improve the consistency of the mechanical
properties of the product.
[0056] The limiting portion 230 and the tail of the movable spring 300 connected to the
main sheet body 210 are located at the same side of the main sheet body 210 and extend
downward and bend, the bottom surface of the limiting slot 112 is lower than the boss
111, which can prevent the limiting portion 230 from limiting or interfering with
the movable spring 300 connected to the main sheet body 210, thereby avoiding affecting
the elasticity of the movable spring 300 and also ensuring that the movable spring
300 has sufficient space for movement. The arrangement of the retaining wall 113 and
its limiting protrusion can limit the lead-out pin 220 and prevent the lead-out pin
220 from being forced during the product production process and product application
process to cause changes in the relevant mechanical parameters of the relay product
and affecting the performance of the relay. The blocking portion 115 abuts against
the other side surface of the main sheet body 210 in the length direction Z of the
base 1, and cooperate with the limiting slot 112 to limit the degree of freedom of
the main sheet body 210 and the limiting portion 230 in the length direction of the
base 100, so that the technical solution of the present disclosure can limit the degree
of freedom of the main sheet body 210 of the movable spring terminal 200 in the length
direction Z of the base 100, prevent the main sheet body 210 of the movable spring
lead-out sheet 200 from lateral shaking when the magnetic latching relay is dropped
or impacted by an external force, and help to improve the consistency of the product's
mechanical properties.
[0057] The movable spring terminal limiting structure of the present disclosure, through
the structural design of the movable spring lead-out sheet and the base adapted to
it, the movable spring terminal can be limited in multiple dimensions, thereby reducing
the degree of freedom of the movable spring lead-out sheet, the movable spring lead-out
sheet can only move in the opposite direction of its insertion direction after the
movable spring lead-out sheet is installed on the base, and ensuring the stability
and robustness of the position of the movable spring, and further improving the stability
of the contact gap, the contact over-travel, and the contact pressure of the relay
product. At the same time, there is also a separate limit for the lead-out pin of
the movable spring terminal to prevent the lead-out pin 220 from being forced during
the production process and application process to cause changes in the relevant mechanical
parameters of the relay product and affecting the performance of the relay.
[0058] The present disclosure provides a latching relay, which includes the movable spring
terminal limiting structure of the present disclosure as described above.
[0059] In the latching relay provided by the present disclosure, the parts not involved
are the same as the related technology or can be realized by using the related technology.
[0060] The above-mentioned embodiments are only used to further illustrate a bobbin facilitates
automatic winding, a coil, a latching relay and a movable spring terminal limiting
structure, but the present disclosure is not limited to the embodiments, any simple
amendments, equivalent changes and modifications made to the above embodiments based
on the technical essence of the present disclosure fall within the protection scope
of the technical solutions of the present disclosure.
1. A bobbin that facilitates automatic winding, comprising a first flange part (1), a
second flange part (2), a third flange part (3), a first winding part (4) and a second
winding part (5), the first flange part (1), the second flange part (2) and the third
flange part (3) being sequentially distributed along a length direction of the bobbin,
the first winding part (4) being provided between the first flange part (1) and the
second flange part (2), the second winding part (5) being provided between the second
flange part (2) and the third flange part (3); the first flange part (1) being provided
with a plurality of terminal holes, the plurality of terminal holes comprising a first
terminal hole (11) for inserting a start terminal (8) and a second terminal hole (13)
for inserting an end terminal (9), characterized in that, the first flange part (1) is provided with a wire hanging portion, and a bottom
end of the wire hanging portion is lower than a top end of the first flange part (1),
and the second flange part (2) is provided with a first wire guide portion for guiding
a enameled wire (7) from the second winding part (5) to the wire hanging portion.
2. The bobbin that facilitates automatic winding according to the claim 1, characterized in that, the first flange part (1) is provided with a groove (15) which is located at an
inner side of a part where the second terminal hole (13) is located, the groove (15)
is configured to penetrate both sides of the first flange part (1) in a thickness
direction thereof; and the wire hanging portion is located on a groove wall of the
groove (15) at a side close to the second terminal hole (13).
3. The bobbin that facilitates automatic winding according to the claim 2, characterized in that, the wire hanging portion is an upside-down boss (14), a bottom end of the upside-down
boss (14) is higher than a bottom end of the groove wall where the upside-down boss
(14) is located.
4. The bobbin that facilitates automatic winding according to the claim 3, characterized in that, a bottom surface (141) of the upside-down boss (14) is an inclined plane, and an
end of the inclined plane connected to the groove wall where the upside-down boss
(14) is located is a higher end, the other end of the inclined plane away from the
groove wall where the upside-down boss (14) is located is a lower end; an enameled
wire introduction port (16) with a wide top and a narrow bottom is formed between
the upside-down boss (14) and a groove wall on the other side of the groove(15).
5. The bobbin that facilitates automatic winding according to the claim 1, characterized in that, the first wire guide portion is a wire guide groove (21), the wire guide groove
(21) is open at one end close to the second winding part (5), a bottom surface of
the wire guide groove (21) is an inclined surface, and a lower end of the inclined
surface is close to the second winding part (5) and is provided with a rounded corner,
a higher end of the inclined surface is close to the first winding part (4).
6. The bobbin that facilitates automatic winding according to the claim 5, characterized in that, the bottom surface of the wire guide groove (21) is provided with a protruding column
(22) extending upward, an end of the wire guide groove (21) close to an outside of
the second flange part (2) is open, the protruding column (22) is located at the end
of the wire guide groove (21).
7. The bobbin that facilitates automatic winding according to the claim 5, characterized in that, one end of the wire guide groove (21) close to the first winding part (4) is provided
with a rib (23) extending along a width direction (X) of the bobbin, a top end of
the rib (23) is higher than a height of the enameled wire (7) after being wound on
the first winding part (4); the rib (23) and a higher end of the bottom surface of
the wire guide groove (21) are in a circular arc transition.
8. The bobbin that facilitates automatic winding according to the claim 1, characterized in that, the plurality of terminal holes further comprises a third terminal hole (12) for
inserting a common terminal (10), the third terminal hole (12) is located between
the first terminal hole (11) and the second terminal hole (13).
9. The bobbin that facilitates automatic winding according to the claim 1 or 8, characterized in that, the first flange part (1) is provided with a plurality of vent holes (19), the plurality
of terminal holes are respectively communicated with at least one vent hole (19).
10. The bobbin that facilitates automatic winding according to the claim 9, characterized in that, the plurality of terminal holes are respectively arranged up and down corresponding
to corresponding vent holes (19), and an aperture of the vent hole (19) is smaller
than an aperture of a terminal hole.
11. The bobbin that facilitates automatic winding according to the claim 1, characterized in that, the second flange part (2) is provided with a second wire guide portion for guiding
the enameled wire (7) from the first winding part (4) to the second winding part (5),
the second wire guide portion is an oblique retaining wall (25); a side of the first
flange part (1) facing the first winding part (4) is provided with a first wire passing
notch (17) and a second wire passing notch (18), the first wire passing notch (17)
and the second wire passing notch (18) are located at opposite sides of the first
winding part (4); a side of the second flange part (2) facing the second winding part
(5) is provided with a third wire passing notch (24) corresponding to the second wire
guide portion; the second flange part (2) is provided with a magnetic steel slot (26),
the magnetic steel slot (26) is connected to an core mounting hole (16) penetrating
the first flange part (1), the second flange part (2), the third flange part (3),
the first winding part (4) and the second winding part (5); two limiting bosses (27)
are respectively provided on both sides of the magnetic steel slot (26), and the two
limiting bosses (27) are respectively provided with arc-shaped notches (271) that
cooperate with a rotating shaft of an armature.
12. A coil, comprising an enameled wire (7) and a plurality of terminals, characterized in that, the coil further comprises a bobbin that facilitates automatic winding of any one
of claims 1 to 11, each terminal is inserted into a cooperating terminal hole, the
enameled wire (7) is started from a terminal inserted into a first terminal hole (11),
and is guided to a wire hanging portion through a wire guide groove (21) after being
wound, and is connected to a terminal inserted into a second terminal hole (13) after
an wire is hung on the wire hanging portion.
13. A latching relay, characterized in that, the latching relay comprises a coil of the claim 12.