JP2500290Y2 - Switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a switch suitable for use in a transmission position sensor or the like, and in particular, a conductor plate elastically supported by a holder is mounted on a substrate. The present invention relates to a switch that is turned on / off by sliding a fixed contact provided on the resin surface of a substrate.

[Conventional technology]

This type of switch is known and described in, for example, US Pat. No. 3,602,656.

FIGS. 11 to 14 are explanatory views of the switch described in the above publication, FIG. 11 is a plan view of the switch, FIG. 12 is a bottom view of a holder provided in the switch, and FIG. FIG. 12 is a sectional view taken along the line AA in FIG. 12, and FIG. 14 is a sectional view taken along the line B- in FIG.
It is sectional drawing which follows the B line.

In FIG. 11, reference numeral 1 denotes a synthetic resin substrate,
A plurality of wiring patterns 2 (fixed contacts) made of a copper material are provided on the surface of the. Reference numeral 3 denotes a metal cover attached to the substrate 1, and a circular rotation hole 4 (only the cover 3 side is shown in FIG. 11) is formed in the cover 3 and the substrate 1. Reference numeral 5 denotes a holder made of synthetic resin, and at one end of the holder 5, a tubular portion 5a having an oval-shaped operation hole 6 in the center is formed to project. The tubular portion 5a includes the substrate 1 and the cover 3
Are rotatably inserted in the respective rotation holes 4.

As apparent from FIGS. 12 to 14, first and second conductor plates 7 and 8 are held on the back surface of the holding body 5, and these conductor plates 7 and 8 face the substrate 1. are doing.
The first conductor plate 7 has a circular hole portion 7a at one end in the lateral direction of the holder 5 and a hooking claw 7b at the other end, and the holder 5
Has two contacts 7c and 7d at both longitudinal ends thereof so as to straddle the latch claw 7b, and further has a spring receiver 7e at the center. The first conductor plate 7 thus formed is
A conical projection formed on the holding body 5, which is attached to the holding plate 5 with one end of the coil spring 9 wound around the spring receiver 7e.
By engaging the circular hole 7a with the circular hole 5a, the projecting portion 5a is swingably supported about the fulcrum, and the latch claw 7b is held by the holder 5.
By coming into contact with the stepped portion 5b formed in the above, the fall from the holding body 5 is prevented.

The second conductor plate 8 has hooks 8a, 8b at both ends in the lateral direction of the holder 5, and two contacts 8c, 8d near the bases of these hooks 8a, 8b. Spring support 8 in the center
have e. The second conductor plate 8 has the spring support 8
The coil spring 10 is attached to the holding body 5 in a state where one end of the coil spring 10 is wound around the e, and the hooking claws 8a and 8b are stepped portions 5e in the concave grooves 5c and 5d formed at both ends in the width direction of the holding body 5. By coming into contact with 5f, it is possible to prevent the holder 5 from falling off.

The switch thus configured is mounted on a vehicle so that the operation hole 6 of the holder 5 and the connecting pin of the shift lever (not shown) are connected to each other. Therefore, when the driver moves the shift lever to a predetermined position, the holding body 5 rotates around the rotation hole 4 in conjunction with it, and the contacts 7c of the first and second conductor plates 7 and 8 are When 7d, 8c, and 8d come in contact with and separate from each wiring pattern 2, a desired position signal such as a position signal or a back light signal is output. In this case, both contacts 7c and 7d of the first conductor plate 7 move in the extending direction of the two groups of wiring patterns 2 in parallel with each other as shown by the chain double-dashed line in FIG. The conductor plate 7 is a coil spring 9
Since the protrusion 5a is swingably supported by the elastic force of the substrate 1, even if there is a slight step between the wiring patterns 2 or between the substrate 1 and the wiring pattern 2, these substrate 1 and the wiring pattern 2 can slide on. Similarly, the second
Both contact points 8c, 8d of the conductor plate 8 of FIG. 11 move in the extending direction of the innermost wiring pattern group 2 in FIG.
Is held by the elastic force of the coil spring 10 so as to be vertically movable along the concave grooves 5c and 5d, so that even if there is a slight step between the substrate 1 and the wiring pattern 2, It can slide.

[Problems to be solved by the device]

By the way, the plurality of rows of the wiring patterns 2 do not necessarily have to match the movable range of the holding body 5, and the holding body 5 can be moved by, for example, a separately provided wiring board or a combination of the wiring pattern rows. It may be extended to a part within the range. In such a case, the contacts 7c, 7d, 8c, 8d of the first and second conductor plates 7, 8 slide on the respective surfaces of the substrate 1 and the wiring pattern 2 as the holder 5 rotates. However, since the contact 7c, 7d, 8c, 8d slides on the substrate 1 even in a region irrelevant to ON / OFF switching, the wear amount of the contacts 7c, 7d, 8c, 8d becomes large, and the contact 7c, 7d, 8c, 8d There is a problem that the contact timing with the wiring pattern 2 becomes unstable, in other words, the on / off switching accuracy deteriorates.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, reduce wear of the movable contact, and provide a switch with high on / off switching accuracy.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a substrate made of synthetic resin, a holder rotatably provided on the substrate, and a concentric circle on the surface of the substrate about a rotation fulcrum of the holder. A plurality of rows of fixed contacts disposed on the holding body, a plurality of conductor plates supported by the holding body corresponding to these fixed contacts, and interposed between the conductor plates and the holding body. A coil spring that elastically biases the substrate toward the surface of the substrate, and a movable contact provided on the conductor plate contacts and separates from the fixed contact to switch between on and off. In the non-extended area irrelevant to the switching of the contact where the fixed contact is not extended, a rib is provided protruding from the center of the lower surface or both ends of the lower surface of the conductor plate to separate the movable contact from the surface of the substrate. The ribs to support the rotation of the holder. And forming an arc shape around the, it is characterized in that the elastic contact of the coil spring in the upper central portion of the conductor plate.

[Action]

According to the above means, in the non-extended area unrelated to the on / off switching, the conductor plate rides on the rib against the elastic force of the coil spring and floats from the surface of the substrate. Wear on the moving contacts is eliminated. At that time, the coil spring makes elastic contact with the center of the conductor plate, and the ribs contact the center or both ends of the bottom face of the conductor plate, so that the conductor plate completely floats from the surface of the substrate, and the rib protrusion amount is reduced. Then, the switch can be made thinner. On the other hand, in the on / off switching area, the contact between the conductor plate and the rib is released, so that the movable contact receives elastic force and slides on the fixed contact with a predetermined contact pressure. ON / OFF is switched by contact / separation between the conductor plate and the fixed contact.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a partially cutaway plan view of a switch according to an embodiment of the present invention, FIG. 2 is a bottom view of the switch, and FIG.
FIG. 4 is an exploded perspective view of the switch, FIG. 4 is a sectional view of the switch, FIG. 5 is a bottom view of the holder, FIG. 6 is a sectional view taken along the line CC of FIG. 5, and FIG. 5 is a sectional view taken along the line DD of FIG. 5, FIG. 8 is a plan view showing the positional relationship between the wiring pattern and the conductor plate, and FIG. 9 is a sectional view taken along the line EE of FIG. The drawing is a sectional view taken along the line FF of FIG.

In these figures, 11 is a substrate made of synthetic resin whose planar shape is roughly fan-shaped, and connector portions 11a, 11b,
The protrusion 11c is formed. A plurality of wiring pattern (fixed contact) groups 12, 13, 14, 15 are concentrically arranged on the surface of the substrate 11. Out of these, the outer three rows of wiring patterns 12, 13 and 14 are copper plates outsert-molded on the substrate 11 and are used as fixed contacts for relatively large currents.
On the other hand, a plurality of wiring patterns 15 inside the wiring pattern 14
The group is composed of a wiring board 16 mounted on the board 11 and patterned by etching a copper foil, for example, and is used as a fixed contact for a relatively small current.

Reference numeral 17 is a metal cover having a substantially fan-shaped plan.
17 is attached to the substrate 11 via a rubber ring 18, and these are joined and integrated by screws (not shown) (fourth).
See figure). As shown in FIG. 3, a screw hole 17a is formed in the center position of the cover 17, and a metal holder 19 and a rubber holder 19 are provided on the back surface of the cover 17 so as to seal the screw hole 17a. A stopper plate 21 is fixed via a seal 20 of the. Then, a temporary set screw 22 is screwed into the screw hole 17a from the outside of the cover 17, and by tightening the temporary set screw 22, the pressing force of the temporary set screw 22 is reduced by the receiving metal 19 and the sealing material.
It acts on the holding body described later via 20.

Reference numeral 23 is a holder made of synthetic resin, and a cylindrical shaft portion 23a having an operation hole 24 at the center is formed to project from one end side of the holder 23, and these shaft portions 23a are formed on the substrate 11 and the cover 17. The rotatably inserted into the rotary hole 17b formed in the through holes 25 and 26, respectively. Therefore, on the upper surface side of the substrate 11, airtightness is ensured by the rubber ring 18, the sealing material 20, and both packings 25, 26, and a waterproof structure is provided (the waterproof structure on the lower surface side of the substrate 11 will be described later. To).

As shown in FIG. 5, on the back surface of the holding body 23, the first and second conductor plates 27, 2 are provided from the outer side toward the inner operation hole 24.
8 and the slider 29 are sequentially held, and the first conductor plate 27
Is the outermost circumference and the wiring patterns 12 and 13 inside it,
The second conductor plate 28 faces the inner wiring pattern 14, and the slider 29 faces the wiring pattern group 15 on the wiring board 16.

As is apparent from FIG. 6, a standing piece 30 having a hook 30a is bent at one end of the first conductor plate 27, and an engaging piece 31 having an arcuate lower surface is formed downward at the other end. Two contact points (movable contact points) 32 and 33 are formed to bulge toward the rising piece 30 on the lower surface. On the other hand, the holder 2
An engaging hole 34 is formed at one end in the lateral direction of 3, and an attaching hole 3 having an engaging groove 35a having a V-shaped cross section at the inner bottom portion at the other end.
5 is formed, and a spring accommodating hole 36 is formed between the engaging hole 34 and the mounting hole 35. Then, the first conductor plate 27 is attached to the holding body 23 together with the coil spring 37 in a state where the engaging piece 31 is engaged in the engaging groove 35a, and the engaging claw 30a serves as an inner bottom surface of the engaging hole 34. By abutting, it is prevented from dropping from the holding body 23. In this case, the first conductor plate 27 is
The engaging groove 35a is rotatable in the direction of the arrow in FIG. 6 and the engaging piece 31 has an arc shape, so that the engaging groove 35a can be rotated.
It is also possible to rotate in the direction orthogonal to the paper surface of FIG.

Further, as is apparent from FIG. 7, the second conductor plate 28
Has a flat plate portion 38 having a substantially track-like planar shape, and contacts (movable contacts) 39 and 40 are bulged at both ends in the longitudinal direction of the flat plate portion 38, and both side surfaces in the lateral direction thereof are formed. A pair of engagement pieces 41 are formed to bend upward. Further, semi-circular projections 41a are formed on both side edges of the engagement pieces 41, and engaging claws 41b are formed on the upper portions of both engagement pieces 41 so as to project outward ( (See FIGS. 9 and 10). On the other hand, the holding body 23 is formed with a pair of mounting holes 42 at predetermined intervals in the longitudinal direction thereof, and a step portion is formed at the inner bottom portion of these mounting holes 42.
A spring accommodating hole 43 is formed between 42. Then, the second conductor plate 28 is attached to the holding body 23 together with the coil spring 44 in a state where both the engaging pieces 41 are inserted into the both mounting holes 42, and the engaging claws are provided.
41b comes into contact with the step on the inner bottom of the mounting hole 42 so that the holder 2
It is prevented from dropping from 3. In this case, the second conductor plate 28 can move up and down by the protrusion 41a being guided by the inner wall of the mounting hole 42, and along the plane parallel to the paper surface of FIG. 7 with the protrusion 41a as a fulcrum. It can be rotated like a seesaw.

Each of the above-mentioned wiring patterns 12, 13, 14 is connected and integrated in a part at the time of outsert molding on the substrate 11,
After molding, the connecting portion is cut by press working (for example, the circular hole 45 and the rectangular hole 46 in FIG. 1) to be patterned into a desired arrangement state and the connector portion 11
They are led by a, 11b, 11c. For this reason, various holes 45 and 46 are formed in the substrate 11 by the above-mentioned press working, and these holes 45 and 46 are adapted to be closed by a lid body described later. .

Each wiring pattern 12, 13, 14 formed in this way
As shown in FIG. 8, the outermost wiring pattern 12 is extended as a pair of fixed contacts along the rotation direction of the holding body 23, and the wiring pattern 13 inside is a common terminal, The wiring pattern 14 extends as a pair of fixed contacts along the rotation direction of the holder 23. And the holder 23
With the rotation of the slider, the contacts 32, 33 of the first conductor plate 27 are on the wiring patterns 12, 13 and the contacts 39, 40 of the second conductor plate 27 are on the wiring pattern 14, 29 slides on each wiring pattern group 15 of the wiring board 16, respectively, and a desired switching operation is performed according to the rotational position of the holder 23. in this case,
The wiring pattern group 15 extends over almost the entire circumference of the rotation range of the holder 23, but the remaining wiring patterns 12, 1
3, 14 are extended only in a part of the rotation range of the holding body 23, and accordingly, the first and second conductor plates 27, 28 are provided on the substrate except the wiring patterns 12, 13, 14. 11 will slide on (this point will be described later).

Three ribs 47, 48, 49 are concentrically formed on the non-extending portion of the wiring patterns 12, 13, 14 on the substrate 11 with the rotation hole 11d as the center. Relatively narrow outermost rib
47 is located between both wiring patterns 12 and 13, and a tapered surface 47a is formed at the end thereof. Central and innermost ribs 48,
The ribs 49 are wider than the ribs 47, and these are continuous with the narrow sliding protrusions 50 and 51 protruding from the inner and outer circumferences of the wiring pattern 14, respectively, and the connecting portions of both are also tapered. Face 48
a and 49a are formed. Corresponding to these sliding protrusions 50, 51, two protrusions 52, 53 are provided on the back surface of the holding body 23 (see FIG. 5), and both sliding protrusions 50, 51 and both ribs are provided. 48,49
A continuous surface formed by a part of the above functions as a sliding surface of the protrusions 52, 53.

Further, as shown in FIG. 8, a slit 54 formed of a groove or a hole is provided between both fixed contacts constituting the wiring pattern 14 in order to ensure the insulation between the two. The slit 54 has a substantially drum shape in a plan view, and is widest on both sides along the extending direction of the wiring pattern 14 and gradually narrows toward the center. The contacts 39, 40 of the second conductor plate 28 slide in the center of the wiring pattern 14 and the slit 54, but at that time, the contacts 39, 40 do not fall into the slit 54.
The width of the center of the slit 54 is set smaller than the diameter of the contacts 39, 40. On the other hand, the width of both sides of the slit 54 is set to be approximately the same as the diameter of the contacts 39, 40, increasing the insulation distance and reducing the contact 3
It functions as a reservoir for abrasion powder attached to 9,40.

As shown in FIGS. 2 to 4, a lid 55 is attached to the back surface of the substrate 11, and the periphery of the lid 55 is fixed to the substrate 11 with an adhesive 56 such as epoxy resin. This lid 55
Is made of a synthetic resin material that is more elastic than the substrate 11,
An elastic projection 57 having a concave cross section is integrally formed in an annular shape. Further, a plurality of locking pieces 58 are provided in the portion surrounded by the elastic protrusion 57.
And a through hole 59 is formed in the center thereof. Further, a cap 61 is fixed to the locking piece 58 via a sealing material 60 so as to seal the through hole 59. On the other hand, on the back surface of the substrate 11, a bank wall 62 is projectingly provided in an annular shape, and the bank wall 62 is inserted into the elastic protrusion 57. The fitting state of the bank wall 62 and the elastic protrusion 57 is not tight, and a slight clearance is formed on the inner side. Therefore, the various holes 45, 46 formed in the substrate 11 by the above-mentioned press working or the like are closed by the lid 55 and the adhesive 56, and a waterproof structure is also formed on the lower surface side of the substrate 11. It is provided.

When assembling the switch described above, first, the substrate 11
To the holder 23, the cover 17, the lid 55, etc.
The switch shown in FIG. 1 is obtained. In this state, the holding body 23 is rotatable with respect to the substrate 11, so that the wiring patterns 12, 1
It is possible to perform the necessary inspections for switches such as disconnection and short circuit of 3,14,15.

Next, a jig is inserted into the operation hole 24 of the holder 23 to
23 is rotated to the center position, and the holder 23 is correctly aligned with the center position of the substrate 11 based on the electrical or mechanical reference alignment means. After that, temporarily set screw
Tighten 22 and press the holder 23 toward the substrate 11 to obtain a switch in a temporarily fixed state in which rotation of the holder 23 is blocked.

In this way, the switch is shipped and transported in a temporarily fixed state, mounted on the vehicle, and connected to a shift lever (not shown) installed in the neutral position via a connecting pin inserted into the operation hole 24. It Therefore, the holding body 23 can be connected at the correct angle corresponding to each position of the shift lever, and if the temporary setting screw 22 is loosened after the connection, the temporary fixing is released.

When the driver moves the shift lever to a predetermined position after releasing the temporary fixing, the holding body 23 interlocks with the shaft 23a in conjunction with the shift lever.
The first and second conductor plates 27, 28 and the slider 29 are rotated around the respective wiring patterns 12, 13, 14, 15 corresponding to each other.
A desired position signal such as a position signal or a back light signal is detected by contacting or separating from the position signal.

In this case, the first conductor plate 27 moves along the extending direction of the outer two rows of wiring patterns 12 and 13, but the wiring pattern 1
In the contact switching area where 2 and 13 are extended, as shown in FIG. 10, both contacts 32 and 33 of the first conductor plate 27 receive the elastic force of the coil spring 37 and are wired to the substrate 11. Slide on the patterns 12 and 13. On the other hand, in the non-extending area of the wiring patterns 12 and 13 which is not related to the switching of the contact points, as shown in FIG. 9, the center of the lower surface of the first conductor plate 27 passes through the tapered surface 47a and rides on the rib 47. By sliding on the upper surface of the rib 47, the contacts 32, 33 are separated from the surface of the substrate 11, and wear of the contacts 32, 33 in the area is eliminated.

Similarly, the second conductor plate 28 moves along the extending direction of the wiring pattern 14, but in the contact switching region,
As shown in FIG. 10, the second conductor plate 28 has two sliding protrusions 50, 51.
The contact points 39 and 40 slide on the substrate 11 and the wiring pattern 14 under the elastic force of the coil spring 44. At this time, since the slit 54 is provided between the pair of fixed contacts forming the wiring pattern 14, the insulation distance between the fixed contacts is increased, and the width of the slit 54 is narrow at the center thereof. Since it is formed, the amount of contact 39, 40 falling into the slit 54 is small, deterioration of the sliding feel and wear of the contact 39, 40 are reduced, and the abrasion powder adhering to the contact 39, 40 is Since they are deposited on the wide portions on both sides, short-circuit between both fixed contacts due to abrasion powder is prevented for a long period of time. On the other hand, in the area not related to the switching of the contacts, as shown in FIG. 9, both sides of the lower surface of the second conductor plate 28 slide on the upper surfaces of the ribs 48, 49 through the tapered surfaces 48a, 49a. Therefore, the contacts 39, 40 are separated from the surface of the substrate 11, and wear of the contacts 39, 40 in this area is eliminated.

Further, the slider 29 moves along the extending direction of the wiring pattern 15 group provided on the inner wiring board 16, but since these wiring pattern 15 groups extend over the circumferential direction of the substrate 11, The contacts are switched according to the rotational position of the holding body 23.

It should be noted that, when the environmental temperature changes after the slit is installed in a vehicle, due to the difference in the coefficient of thermal expansion between the substrate 11 and the lid body 55 made of different materials, the thickness of the elastic lid body 55 on the side of the lid body 55 is increased. Stretching force acts in a direction orthogonal to (direction of arrow X in FIG. 4). In this case, the elastic projection 57 provided on the lid 55 and having a concave cross section is used.
Is engaged with the bank wall 62 of the substrate 11, for example, when a force in the contracting direction acts on the lid body 55, the contracting force is applied to the elastic protrusion 57.
When the inner vertical wall of the elastic projection 57 is absorbed by bending toward the center and a force in the extension direction is applied to the lid body 55, the extension force is generated by the inner vertical wall of the elastic protrusion 57 at the outer periphery within the clearance. It is absorbed by bending in the direction, and in any case, almost no force acts on the adhesive 56, and the peeling accident of the adhesive 56 is prevented. Therefore, the various holes 45 and 46 formed in the substrate 11 are fixed to the upper surface side of the substrate 11 by the cover 17 sealed with the rubber ring 18, and to the lower surface side of the substrate 11 with the adhesive 56. The lid 55 ensures reliable sealing, and the air in and out of the inside is sucked and exhausted by the seal material 20 on the cover 17 side and the seal material 60 on the lid 55 side. A high switch is realized.

[Effect of device]

As described above, according to the present invention, in the non-extended region irrelevant to the switching of the contacts where the conductor plate moves opposite to the substrate, the center or both ends of the bottom face of the conductor plate resists the elastic force of the coil spring. Then, the conductor plate slides on the rib in a state where the conductor plate is completely floating from the surface of the substrate, reducing the amount of wear of the movable contact and providing a switch with high on / off switching accuracy. it can.

[Brief description of drawings]

1 to 10 relate to an embodiment of the present invention. FIG. 1 is a plan view showing a partially broken switch, FIG. 2 is a bottom view of the switch, and FIG. 3 is an exploded perspective view of the switch. FIG. 4 is a sectional view of the switch, FIG. 5 is a bottom view of the holding body, FIG. 6 is a sectional view taken along the line CC of FIG. 5, and FIG. 7 is DD of FIG.
8 is a cross-sectional view taken along the line, FIG. 8 is a plan view showing the positional relationship between the wiring pattern and the conductor plate, FIG. 9 is a cross-sectional view taken along the line EE of FIG. 8, and FIG. 10 is F of FIG. -Cross-sectional view taken along line F, No. 11
11 to 14 are related to a conventional example, FIG. 11 is a plan view showing a partially broken switch, FIG. 12 is a bottom view of a holder, and FIG. 13 is taken along the line AA of FIG. Sectional view, Figure 14 is B of Figure 12
It is sectional drawing which follows the -B line. 11 ... Substrate, 11d ... Rotation hole, 12,13,14,15 ... Wiring pattern, 17 ... Cover, 23 ... Holder, 23a ... Shaft, 24
…… Operation hole, 27 …… First conductor plate, 28 …… Second conductor plate, 29 …… Slider, 32,33,39,40 …… Contact, 37,44 …… Coil spring, 45 , 46 …… Hole, 47,48,49 …… Rib, 50,51 ……
Sliding protrusions, 52, 53 ... Protrusions, 54 ... Slits, 55 ... Lid, 56 ... Adhesive, 57 ... Elastic protrusions, 62 ... Levees.

Claims (1)

(57) [Scope of utility model registration request] 1. A synthetic resin substrate, a holder rotatably provided on the substrate, and a plurality of rows concentrically arranged on the surface of the substrate around a rotation fulcrum of the holder. Fixed contacts, a plurality of conductor plates supported by the holder corresponding to these fixed contacts, and interposed between the conductor plates and the holder, each conductor plate in the surface direction of the substrate. A switch provided with a coil spring for elastically urging, wherein the movable contact provided on the conductor plate is turned on and off by coming into contact with and separating from the fixed contact, and the fixed contact of the substrate is extended. In the non-extended area irrelevant to the switching of the contacts, a rib that abuts the center or both ends of the bottom surface of the conductor plate and separates the movable contact from the surface of the substrate is projected, and the rib is held by the holder. Shaped in an arc around the body's rotation fulcrum Switch characterized with, that elastic contact with the coil spring in the upper central portion of the conductor plate to.