JP2009193690A - Vehicle switch - Google Patents

Abstract

[PROBLEMS] To provide a vehicular switch used mainly for control of extinguishing a stop lamp of an automobile, etc., having a simple configuration, high switching accuracy associated with vertical movement of an operating body, and capable of reliable operation. With the goal.
[MEANS FOR SOLVING PROBLEMS] Support portions (23B, 23D) for positioning a predetermined direction in a vertical direction or a horizontal direction of a magnet (3) in a substantially rectangular hole shape below an operating body (22) accommodated in a case (1) so as to be movable up and down, and these By providing the holding portion 23 having the ribs 23C and 23E formed on the opposing surfaces and press-fitting the magnet 3 into the holding portion 23, the magnet 3 is positioned in the vertical and horizontal directions by the support portions 23B and 23D. And the detecting means 6 can be reduced, so that a vehicular switch can be obtained with a simple configuration, high switching accuracy associated with the vertical movement of the operating body 22, and capable of reliable operation.
[Selection] Figure 1

Description

  The present invention relates to a vehicular switch that is mainly used for controlling the extinction of a stop lamp when operating a brake pedal of an automobile.

  In recent years, a push-operated type vehicle switch is mainly used for controlling the stop lamp accompanying the operation of the brake pedal. The stop lamp is turned on when the brake pedal is depressed and turned off when the brake pedal is released. ing.

  Such a conventional vehicle switch will be described with reference to FIGS.

  FIG. 9 is a side sectional view of a conventional vehicle switch. In FIG. 9, reference numeral 1 is a case made of a substantially box-shaped insulating resin with an upper surface opening, and 2 is an operating body housed in the case 1 so as to be movable up and down. Thus, the magnet 3 is mounted on the substantially square hole-shaped holding portion 2A provided on the lower right side surface of the operating body 2.

  The holding portion 2A has a substantially square hole shape that is open on the right side and slightly larger than the outer shape of the magnet 3, and the magnet 3 is attached and fixed to the holding portion 2A with an adhesive.

  Reference numeral 4 denotes a plurality of terminals made of conductive metal, 5 denotes a wiring board having a plurality of wiring patterns (not shown) formed on the left and right surfaces, and the wiring board 5 is disposed on the right side wall of the case 1. The upper ends of the plurality of terminals 4 are connected to the wiring pattern of the wiring board 5 by soldering or the like, and the lower ends of the terminals 4 protrude downward from the bottom surface of the case 1.

  Further, on the surface of the wiring board 5 facing the magnet 3, a detection means 6 such as a Hall element or a semiconductor magnetoresistive (SMR) element, a switching means 7 such as a transistor, a control means such as an FET or a plurality of fixed resistors is provided. 8 is formed, and the control means 8, the detection means 6, the switching means 7, and the terminal 4 are electrically connected through a wiring pattern.

  Further, 9 is a coiled return spring, 10 is an insulating resin cover that covers the opening on the top surface of the case 1, and the return spring 9 is slightly bent between the lower surface of the operating body 2 and the bottom surface of the case 1. The vehicle switch 12 is configured by being mounted and biasing the operating body 2 upward, and the upper end of the operating body 2 projecting upward from the hollow cylindrical portion at the center of the upper surface of the cover 10.

  As shown in the side view of the main part of FIG. 8, the vehicular switch 12 thus configured is generally mounted in front of the brake pedal 30 of the automobile in a state where the tip of the operating body 2 is pressed by the arm 30A. In addition, the plurality of terminals 4 protruding from the bottom surface of the case 1 are connected to a stop lamp, an ignition switch, a battery, an electronic circuit (not shown) of the vehicle, and the like by a connector 31 and lead wires.

  That is, when the brake pedal 30 is not depressed, the operating body 2 is pressed downward while bending the return spring 9, and the magnet 3 mounted on the right side of the operating body 2 also moves downward. The center of the detection means 6 arranged opposite to the center is greatly separated, and the magnetism of the magnet 3 detected by the detection means 6 is weak.

  The control means 8 connected to the detection means 6 closes the switching means 7 when the magnetism is detected by the strength of the magnetism detected by the detection means 6 and the magnetism is In the case of an OFF signal equal to or less than a predetermined value, the switching means 7 is opened. Therefore, when the operating body 2 is pressed, the switching means 7 is opened and the stop lamp is turned off. It is in a state.

  When the brake pedal 30 is depressed, the arm 30A is separated from the tip of the operating body 2 and the pressing force is removed, so that the operating body 2 moves upward by the elastic return force of the return spring 9, as shown in FIG. At the same time, the magnet 3 attached to the operating body 2 also moves upward so that the magnet 3 and the detection means 6 face each other, and the magnetism of the magnet 3 detected by the detection means 6 becomes stronger, so that the control means 8 switches. The means 7 is switched to the closed state, and the stop lamp lights up.

  That is, by operating the brake pedal 30, the operating body 2 of the vehicle switch 12 is moved up and down, and the magnetism of the magnet 3 on the right side surface of the operating body 2 is detected by the detecting means 6. In response to the ON signal, the control means 8 opens and closes the switching means 7 so that the stop lamp is turned off and the switching accuracy of the turn-off when the operating body 2 moves up and down is as follows. It is greatly influenced by the positional relationship between the magnet 3 and the detection means 6.

  Therefore, in such a switch 12 for a vehicle, since the magnet 3 is fixed in the holding portion 2A, which is slightly larger than this, via the adhesive, the inside of the holding portion 2A is changed due to changes in the surrounding environment such as temperature and humidity during assembly. Therefore, the magnet 3 is displaced in the vertical direction and the horizontal direction, and the positional deviation is likely to occur between the magnet 3 and the detecting means 6, so that the switching accuracy due to the vertical movement of the operating body 2 is likely to vary. It was.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2006-92777 A

  However, in the above-described conventional vehicle switch 12, the magnet 3 is displaced in the holding portion 2 </ b> A due to the magnet 3 being attached and mounted in the holding portion 2 </ b> A of the slightly larger operating body 2, and the magnet 3. Since there is a tendency for positional deviation between the detecting means 6 and the detection unit 6, there is a problem that the switching accuracy of the turn-off / lighting accompanying the vertical movement of the operating body 2 is likely to vary.

  The present invention solves such a conventional problem, and an object of the present invention is to provide a vehicular switch with a simple configuration, high switching accuracy, and capable of reliable operation.

  In order to achieve the above object, the present invention is provided with a support part for positioning a predetermined direction of the magnet in a substantially square hole shape below the operating body and a rib formed on the opposing surface of the support part, and A magnet is press-fitted to the holding portion. For example, a magnet is provided by providing a support portion on the inner surface of the holding portion and on the inner surface of the detection means, and a rib on the opposite surface of the support portion. Is positioned in the vertical and horizontal directions by the support part and pressed into the holding part by pressure contact with the rib, so that the positional relationship between the magnet and the detection means is less misaligned with respect to the specified position. Therefore, it is possible to obtain a vehicular switch that can be operated reliably.

  As described above, according to the present invention, it is possible to obtain an advantageous effect that it is possible to realize a vehicular switch that has a simple configuration, has high switching accuracy associated with the vertical movement of the operating body, and can be reliably operated. .

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

  In addition, the same code | symbol is attached | subjected to the part of the structure same as the structure demonstrated in the term of background art, and detailed description is simplified.

(Embodiment 1)
1 is a side sectional view of a vehicle switch according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the switching, in which 1 is a case made of a substantially box-shaped insulating resin with a top opening, Reference numeral 22 denotes an operating body made of an insulating resin such as polyoxymethylene, and a substantially cylindrical shaft portion is formed above the operating body 22, and a substantially square hole shape having an opening 23A formed on the front side on the lower right side. Are provided, and a substantially rectangular parallelepiped magnet 3 is press-fitted into the holding portion 23 and attached thereto.

  As shown in the perspective view of the main part of FIG. 3, the holding portion 23 has a substantially planar support portion 23B on the inner upper surface, and extends in the front-rear direction on the lower surface opposite to the support portion 23B. Ribs 23C provided with inclined portions 23I that are inclined rearward from the rear are formed.

  Further, a plurality of support portions 23D having a substantially planar shape are provided on the right surface inside the holding portion 23, and inclined portions 23J that extend in the front-rear direction and incline from the opening 23A side to the rear side are provided on the left surface facing the support portion 23D. Each rib 23E is formed.

  Further, the support portion 23D is formed with an elastic claw portion 23G which protrudes toward the opening portion 23A and is provided with a protruding portion 23H protruding inward at the tip portion. The upper and lower surfaces, the left surface and the elastic claw portion around the opening portion 23A are formed. Tapered portions 23F are formed at the tips of the 23G.

  When the magnet 3 is press-fitted into the holding portion 23 of the operating body 22, one end of the magnet 3 is guided to the tapered portion 23F and then guided to the inclined portion 23I of the rib 23C and the inclined portion 23J of the rib 23E. In addition, the elastic claw 23G is bent outward and bent backward, and as shown in the perspective view of the main part of FIG. 4, the lower surface and the left surface of the magnet 3 are pressed against each other while deforming the ribs 23C and 23E. The magnet 3 is press-fitted into the holding part 23, and the protrusion 23 </ b> H of the elastic claw part 23 </ b> G is engaged with the other end surface of the magnet 3, so that the magnet 3 is attached to the holding part 23.

  That is, the upper surface of the magnet 3 abuts the support portion 23B, the lower surface of the magnet 3 deforms and presses the rib 23C, the upper surface of the magnet 3 is positioned in the vertical direction by the support portion 23B, and the right surface of the magnet 3 is the support portion. 23D, the left surface of the magnet 3 deforms and presses the two ribs 23E, the right surface of the magnet 3 is positioned in the left-right direction by the support portion 23B, and the magnet 3 is attached to the holding portion 23 of the operating body 22. Yes.

  Thus, the magnet 3 can be easily attached to the holding portion 23 by being press-fitted inward from the opening portion 23A of the holding portion 23, and the end surface of the magnet 3 on the opening portion 23A side is locked by the elastic claw portion 23G. It has been retained.

  At this time, since the material of the holding part 23 is polyoxymethylene and is easily elastically deformed, the elastic claw part 23G is elastically deformed outward with a relatively small load when the magnet 3 is press-fitted into the holding part 23. When mounting, the protrusion 23H of the elastic claw 23G returns to its original position and securely engages with the magnet 3 and elastically contacts the ribs 23C and 23E, so that the magnet 3 can be easily press-fitted and the magnet 3 can be removed even after mounting. It is difficult and secure.

  Moreover, the material thickness of the surface on which the support portions 23B and 23D and the ribs 23C and 23E are formed is 0.8 mm or more. By using such a material thickness, a predetermined strength is ensured, and these surfaces are magnets. It is difficult to deform when pressing 3 or receiving external force.

  Reference numeral 4 denotes a plurality of terminals made of conductive metal, 5 denotes a wiring board having a plurality of wiring patterns (not shown) formed on the left and right surfaces, and the wiring board 5 is disposed on the right side wall of the case 1. The upper ends of the plurality of terminals 4 are connected to the wiring pattern of the wiring board 5 by soldering or the like, and the lower ends of the terminals 4 protrude downward from the bottom surface of the case 1.

  Further, on the surface of the wiring board 5 facing the magnet 3, a detection means 6 such as a Hall element or SMR (semiconductor magnetoresistive) element as a magnetic detection means, a switching means 7 such as a transistor, an FET, or a plurality of fixed resistors. Each of the control means 8 is formed by a container or the like, and the control means 8, the detection means 6, the switching means 7, and the terminal 4 are electrically connected through a wiring pattern.

  The detection means 6 is set in advance so as to be arranged at a predetermined position in the left-right direction, which is the up-down direction and the facing direction, with respect to the magnet 3 mounted on the holding portion 23 below the operating body 22.

  Further, in the front-rear direction, which is the direction in which the magnet 3 is assembled to the holding portion 23, as shown in the plan sectional view of the main part in FIG. 5, the detecting means 6 faces the longitudinal direction of the substantially rectangular parallelepiped magnet 3 and Are arranged so that the horizontal width X of the detection means 6 is normally 1 to 4 mm, and the horizontal width Y of the opposing magnet 3 is 5 to 7 mm, which is sufficiently wider than the horizontal width X of the detection means 6. Even if a slight deviation of about 0.5 mm occurs, the magnitude of magnetism received by the detecting means 6 by the magnet 3 is hardly changed.

  9 is a coiled return spring, 10 is a cover made of insulating resin that covers the opening on the upper surface of the case 1, and the return spring 9 is slightly bent between the lower surface of the operating body 22 and the bottom surface of the case 1. The vehicular switch 24 is configured by mounting and urging the actuating body 22 upward, with the upper end of the actuating body 22 projecting upward from the hollow cylindrical portion at the center of the upper surface of the cover 10.

  Further, as shown in the side view of the main part of FIG. 8, the vehicular switch 24 thus configured is generally mounted in front of the brake pedal 30 of the automobile in a state where the tip of the operating body 22 is pressed by the arm 30A. In addition, a plurality of terminals 4 protruding from the bottom surface of the case 1 are connected to a stop lamp, an ignition switch, a battery, an electronic circuit (not shown) of the vehicle, and the like by a connector 31 and lead wires.

  Then, as shown in the side sectional view of FIG. 6, when the brake pedal 30 is not depressed, the operating body 22 is pressed downward while bending the return spring 9 and is mounted on the right side surface of the operating body 22. The magnet 3 also moves downward, the center of the detection means 6 arranged opposite to the center of the magnet 3 is greatly separated, and the magnetism of the magnet 3 detected by the detection means 6 is weak.

  The control means 8 connected to the detection means 6 closes the switching means 7 when the magnetism is detected by the strength of the magnetism detected by the detection means 6 and the magnetism is In the case of an OFF signal less than a predetermined value, the switching means 7 is opened. Therefore, when the operating body 22 is pressed, the switching means 7 is opened and the stop lamp is turned off. It is in a state.

  Further, when the brake pedal 30 is depressed, the arm 30A is separated from the tip of the operating body 22 and the pressing force is removed, so that the operating body 22 moves upward by the elastic return force of the return spring 9, as shown in FIG. At the same time, the magnet 3 mounted on the operating body 22 also moves upward, so that the magnet 3 and the detection means 6 face each other, and the magnetism of the magnet 3 detected by the detection means 6 becomes stronger, so that the control means 8 switches. The means 7 is switched to the closed state, and the stop lamp lights up.

  Thus, the operating body 22 is moved up and down by operating the brake pedal 30, and the control means 8 switches the open / close state of the switching means 7 in accordance with the value of the magnetic flux density from the magnet 3 mounted on the operating body 22. Thus, the stop lamp is turned off and on.

  Note that the upper end of the magnet 3 mounted on the holding portion 23 of the operating body 22 is positioned by the support portion 23B of the holding portion 23 and the right end is positioned by the support portion 23D. Therefore, the variation of the switching position due to the vertical movement of the operating body 22 is small, and the stop lamp can be reliably turned off and on.

  That is, by positioning the upper end of the magnet 3 by the support portion 23B and the right end by the support portion 23C, respectively, the positional relationship between the position of the upper right end of the magnet 3 and the detecting means 6 is set with respect to a predetermined position set in advance. Therefore, when the operating body 22 is in the lower position and the stop lamp is extinguished, the magnet 3 approaches the detecting means 6 from the upper right end and the detecting means 6 detects the magnetism. In particular, there is little variation in the position of the operating body 22 when switching to a lighting state that requires switching accuracy.

  That is, the upper and lower ends of the magnet 3 are positioned with respect to the moving direction of the operating body 22 by the support portion 23B, and the left and right ends of the magnet 3 in the direction orthogonal to the magnet 3 are positioned in the direction facing the detection means 6 by the support portion 23C. By positioning, the position difference between the magnet 3 and the detection means 6 is prevented, and high-accuracy and stable switching can be performed.

  Further, by positioning the right end of the magnet 3 by the support portion 23C provided with the elastic claw portion 23G, for example, the support portion is provided on the left surface inside the holding portion 23, and the magnet 3 is arranged on the elastic claw portion 23G side facing this. When the rib deformed by pressure is formed and pressed, the hooked state with the magnet 3 by the protrusion 23H at the tip of the elastic claw 23G is easy to change, and the locking tends to become unstable. The right end surface of the elastic claw is always in contact with the inner side of the elastic claw portion 23G, and the hooked state with the magnet 3 by the protrusion 23H of the elastic claw portion 23G is constant and stable, so that the magnet 3 is securely locked as a retaining member. It has become a thing.

  As described above, according to the present embodiment, the support member 23B, 23D that positions the magnet 3 in the vertical direction or the predetermined direction in the left-right direction and the opposing surfaces thereof are formed in a substantially square hole shape below the operating body 22 and inside. By providing the holding part 23 having the ribs 23C and 23E and press-fitting the magnet 3 into the holding part 23, the magnet 3 is positioned in the vertical and horizontal directions on the support parts 23B and 23D and the ribs 23C and 23E. Since the positional deviation between the magnet 3 and the detection means 6 is reduced, the switching accuracy of the extinction / extinction accompanying the vertical movement of the operating body 22 is increased, and a vehicle switch capable of reliable operation is obtained. Can do.

  In the above description, the magnet 3 is brought into contact with and positioned in the substantially planar support portions 23B and 23D of the holding portion 23, but the support portion is not deformed by press-fitting the magnet 3. The present invention can be implemented even if the support portion is configured in a partial manner, for example.

  In the above description, the magnet 3 is described as being configured to be locked by the elastic claw portion 23G of the holding portion 23 to prevent the magnet 3 from coming off. However, although it takes some time to mount, the main portion perspective view of FIG. As shown in FIG. 7 (b), the support portion 33D of the holding portion 33 is provided with a substantially cylindrical or substantially square locking portion 33G, and the magnet 3 is press-fitted into the holding portion 33. A configuration in which the tip of the portion 33G is crushed so as to be deformed inside the holding portion 33 and locked to the opening side end of the magnet 3 or the opening side end of the magnet 3 is not locked. Various configurations may be used to prevent the magnet 3 from coming off from the opening, such as a configuration in which the vicinity of the inner periphery of the opening 33A is fixed with an adhesive after the magnet 3 is press-fitted into the 33.

  The switch for a vehicle according to the present invention has a simple configuration, has a high switching accuracy associated with the vertical movement of the operating body, and can perform a reliable operation, and is mainly used for controlling the turn-off of a stop lamp of an automobile. Useful.

Side surface sectional drawing of the switch for vehicles by one embodiment of this invention Exploded perspective view Perspective view of the main part of the switch Perspective view of the main part of the switch Cross-sectional view of the main part of the switch Side sectional view of the switch during operation The principal part perspective view by other embodiment of the switch Installation diagram of switch for vehicle Side sectional view of a conventional vehicle switch

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 3 Magnet 4 Terminal 5 Wiring board 6 Detection means 7 Switching means 8 Control means 9 Return spring 10 Cover 12 Vehicle switch 22 Actuator 23, 33 Holding part 23A, 33A Opening part 23B, 23D, 33D Support part 23C, 23E Rib 23F Taper part 23G Elastic claw part 23H Projection part 23I, 23J Inclination part 24 Vehicle switch 30 Brake pedal 30A Arm 31 Connector

Claims (1)

A substantially box-shaped case with an opening on the upper surface, an operating body accommodated in the case so as to be movable up and down, a magnet mounted on the operating body, and a detecting means arranged to face the magnet, Provided below the operating body is a substantially square hole-like support portion for positioning the magnet in a predetermined direction and a holding portion having a rib formed on the opposite surface of the support portion, and the magnet is press-fitted to the holding portion. Vehicle switch.

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