JP2013254720A - Rotary switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary switch that has improved dust resistance.SOLUTION: A rotary switch 1 includes: a housing 2 that is coupled to a vehicle body; a rotor 3 that is mounted rotatably on the housing 2 and that is rotated with respect to the housing 2 in association with rotation of a stand with respect to the vehicle body; a flange bolt 54 that fixes the housing 2 and the rotor 3 collectively; and a top seal 52 that is attached firmly to a flange 542 of the flange bolt 54, an inner circumferential surface of the housing 2, and an outer circumferential surface of the rotor 3. The top seal 52 has an annular rib 522 that is in elastic contact with the flange 542 around the entire circumference of a leg 541 of the flange bolt 54. Dust resistance is improved compared to a case in which the top seal 52 is not provided with the rib 522.

Description

  The present invention relates to a rotary switch.

  2. Description of the Related Art Conventionally, a rotary switch is provided that includes a housing provided with a fixed contact, and a rotor that holds the movable contact and rotates with respect to the housing to separate the movable contact from the fixed contact. 1).

  For example, as shown in FIG. 6, this type of rotary switch 1 is attached to a connecting portion between a vehicle body 6 (strictly, a part called a bracket in the vehicle body) and a stand 7 in a two-wheeled vehicle. Used for detection. The stand 7 is rotatably connected to the vehicle body 6 as indicated by an arrow A <b> 1 between a standing state in which the tip is directed downward of the vehicle body 6 and a retracted state in which the tip is directed rearward of the vehicle body 6. It is. The output of the rotary switch 1 is used for, for example, control such that the stand 7 is prevented from starting in the standing state by preventing the engine from starting when the stand 7 is standing at the time of stopping.

  Further, as shown in FIGS. 7 and 8, the rotary switch 1 includes a housing 2 connected to the vehicle body 6 side and a rotor 3 connected to the housing 2 so as to be rotatable and interlocked with the stand 7. There is. A fixed contact 41 is held in the housing 2, and a movable contact 331 is provided on the rotor 3 so as to be in contact with the fixed contact 41 when the rotor 3 rotates with respect to the housing 2. That is, the relative position between the housing 2 and the rotor 3 changes depending on whether or not the stand 7 is in the standing state, and accordingly, the movable contact 331 and the fixed contact 41 are switched from each other. A state of 7 is detected. Hereinafter, the upper and lower sides will be described with reference to FIG. Note that the vertical direction here is defined as the upward direction in the direction in which the parts are overlapped for the sake of convenience, and the vertical direction here is the horizontal direction in the normal use state. It is directed in the left-right direction with respect to the traveling direction of the vehicle body 6.

  The housing 2 is made of synthetic resin, and is electrically connected to a bottomed cylindrical main body 21 having a housing recess 20 in which a part of the rotor 3 is housed opened on the lower surface, a fixed contact 41 and a movable contact 331. An output lead portion 22 from which the electric wire 11 is drawn out and a pinching portion 23 that sandwiches a convex portion 61 (see FIG. 6) provided on the vehicle body 6 between the output lead portion 22.

  The inner bottom surface of the housing recess 20 has an arc shape centering on the rotation axis of the rotor 3 with respect to the housing 2 and has two fixed contacts 41 having a common inner diameter and outer diameter, and the thickness direction is directed vertically. A to-be-connected terminal 42 made of a metal plate and having an annular shape centering on the rotation axis of the rotor 3 with respect to the housing 2 and having an outer diameter smaller than the inner diameter of the fixed contact 41 is held. Each fixed contact 41 and the connected terminal 42 are each made of a metal plate whose thickness direction is directed in the vertical direction, and is held in the housing 2 by insert molding. The electric wire 11 drawn out from the output lead-out portion 22 provided in the housing 2 has a plurality of core wires (not shown) corresponding to the fixed contacts 41 and the connected terminals 42 in a one-to-one manner. The wires are electrically connected to corresponding ones of the fixed contacts 41 and the connected terminals 42. A storage space in which the movable contact 331 and the fixed contact 41 are stored is formed between the inner surface of the storage recess 20 and the rotor 3.

  The rotor 3 includes a movable contact 33 that holds a movable contact 331 by punching and bending a metal plate, and an inner rotor that is connected to the movable contact via the movable contact 33 and is stored in the storage recess 20. 31 and an outer rotor 32 that is mechanically coupled to the inner rotor 31 and is disposed across the inside and outside of the housing recess 20. Each of the inner rotor 31 and the outer rotor 32 is made of a synthetic resin such as polybutylene terephthalate (PBT).

  The inner rotor 31 has an annular main body 311 that is flat as a whole, a cylindrical shape that communicates the upper and lower sides of the main body 311, and a shaft 312 that protrudes from the center of the main body 311 to both the upper and lower sides, And a cylindrical coupling portion 313 projecting from the lower surface of the main body portion 311. A cylindrical sleeve 12 that covers the inner surface of the shaft portion 312 is attached to the inner rotor 31. The sleeve 12 is made of metal, for example.

  The movable contact 33 is disposed on the upper side of the main body 311 so as to surround the shaft portion 312 of the inner rotor 31 with the thickness direction directed in the vertical direction. The movable contact 33 is provided with two interlocking projections 332 projecting downward by bending each other in an arrangement opposite to each other across the center, and positioned on the opposite sides across the center in the main body 311 of the inner rotor 31. The interlocking holes 314 are vertically penetrated at the two locations. The interlocking protrusions 332 are inserted into the interlocking holes 314, so that the movable contact 33 rotates in conjunction with the inner rotor 31. Between the lower surface of the movable contact 33 and the main body portion 311 of the inner rotor 31, three contact pressure springs 34 each formed of a coil spring are provided with a position shifted by about 120 ° when viewed from below. The lower end portion of the pressure spring 34 is housed in a spring receiving recess 315 provided on the upper surface of the main body portion 311 of the inner rotor 31, and the upper end of the contact pressure spring 34 is in elastic contact with the lower surface of the movable contact member 33. 31 is biased upward. Of the three locations on the upper surface of the movable contact 33 that are above the contact pressure spring 34, the movable contact 331 is provided at one location, and the two connection terminals 333 that elastically contact the connected terminal 42 at the remaining two locations. Is provided. That is, the connected terminal 42 is electrically connected to the movable contact 331 via the movable contact 33. The contact pressure of the movable contact 331 with respect to the fixed contact 41 and the contact pressure of the connection terminal 333 with respect to the connected terminal 42 are ensured by the spring force of the contact pressure spring 34, respectively.

  The outer rotor 32 has a bottomed cylindrical main body 321, a flange 322 that protrudes outward from the lower end of the main body 321, and a U-shape that protrudes downward from the periphery of the flange 322 and is viewed from below. And a connecting portion 323.

  The outer rotor 32 is joined to the inner rotor 31 by welding with, for example, ultrasonic waves or lasers, with the main body portion 321 being inserted into the coupling portion 313 of the inner rotor 31. An insertion hole 324 into which the shaft portion 312 of the inner rotor 31 is inserted vertically penetrates the bottom surface of the main body portion 321 of the outer rotor 32. Here, on the outer peripheral surface of the main body portion 321 of the outer rotor 32, for example, four engagement convex portions 325 are provided to protrude outward in a position shifted by about 90 degrees, and the inner portion of the coupling portion 313 of the inner rotor 31 is provided. Four engaging recesses (not shown) are provided on the peripheral surface so as to be displaced by about 90 degrees. When the engaging protrusions 325 engage with the engaging recesses, the outer rotor is provided. The rotation of the inner rotor 31 with respect to 32 is prohibited in the plane viewed from the vertical direction. In addition, one of the engaging convex portion 325 and the engaging concave portion has a width dimension larger than the other, and if not a certain combination, the engaging convex portion 325 is engaged with the engaging concave portion. I can't. This prevents the inner rotor 31 from being attached to the outer rotor 32 in the wrong direction.

  When attached to the vehicle body 6, both ends of the connecting portion 323 of the outer rotor 32 sandwich one end pivotally attached to the vehicle body 6 in the stand 7. When the stand 7 rotates with respect to the vehicle body 6, the inner surface of the connecting portion 323 of the outer rotor 32 contacts the stand 7, so that the rotor 3 rotates relative to the housing 2 in conjunction with the stand 7. The separation / contact (contact state) between the movable contact 33 (movable contact 331) and each fixed contact 41 is switched.

  An annular bottom seal 51 is disposed between the lower surface of the main body portion 311 of the inner rotor 31 and the upper surface of the flange portion 322 as a sandwiching portion of the outer rotor 32 in the storage recess 20. The bottom seal 51 is in close contact with the rotor 3 and the housing 2 over the entire circumference of the rotor 3, thereby preventing rainwater from entering through the gap between the rotor 3 and the housing 2 and outflow of lubricant such as grease. Oil seal. More specifically, the bottom seal 51 is in close contact with the inner peripheral surface of the housing recess 20 of the housing 2 and the outer peripheral surface of the coupling portion 312 of the inner rotor 31 over the entire circumference. Further, an annular sliding plate 53 made of metal is disposed between the main body 311 of the inner rotor 31 and the bottom seal 51 in order to reduce friction between the inner rotor 31 and the bottom seal 51. Yes.

  Furthermore, a circular insertion hole 201 is vertically provided in the center of the bottom surface of the storage recess 20. The inner diameter of the insertion hole 201 is larger than the outer diameter of the shaft portion 312 of the inner rotor 31, and the rotor 3 is pivotally supported with respect to the housing 2 by inserting the shaft portion 312 of the inner rotor 31 into the insertion hole 201.

  Further, a flange bolt 54 for attaching the rotor 3 to the stand 7 is inserted into the shaft portion 312 of the inner rotor 31. Here, the stand 7 is pivotally attached to the vehicle body 6 by a pivot bolt 8 penetrating the stand 7 and the vehicle body 6. The flange bolt 54 includes a leg portion 541 that is screwed into a screw hole 81 provided in the pivot bolt 8, and a flange that protrudes over the entire circumference from the upper end portion of the leg portion 541 and sandwiches the housing 2 and the rotor 3 between the stand 7. 542. The flange 542 of the flange bolt 54 cannot be inserted into the insertion hole 201 of the housing 2, and the housing 2 is prevented from falling off by the flange bolt 54. That is, the housing 2 and the rotor 3 are fixed together by the flange bolt 54.

  Further, an annular top seal 52 surrounding the shaft portion 312 is disposed between the inner peripheral surface of the insertion hole 201 and the shaft portion 312 of the inner rotor 31. The top seal 52 is in close contact with the inner peripheral surface of the insertion hole 201 of the housing 2 and the outer peripheral surface of the shaft portion 312 of the rotor 3 so as to pass through the gap between the inner peripheral surface and the outer peripheral surface. It is a so-called oil seal that prevents rainwater from entering and lubricant from flowing out. The top seal 52 has a flange portion 521 that is sandwiched between the lower surface of the flange 542 of the flange bolt 54 and the housing 2.

  Further, on the inner bottom surface of the storage recess 20, a cylindrical tube projection 211 surrounding the insertion hole 201 projects downward. An inner peripheral edge of the connected terminal 42 enters the cylindrical convex portion 211, and each fixed contact 41 has an outer end portion in the radial direction entering the inner peripheral surface of the storage concave portion 20.

JP 2008-288166 A

  In the conventional rotary switch 1 described above, the muddy water may enter between the inner periphery of the top seal 52 and the outer periphery of the shaft portion 312 of the inner rotor 31, and the dustproofness may be impaired.

  The present invention has been made in view of the above reasons, and an object thereof is to provide a rotary switch with improved dustproofness.

  The rotary switch of the present invention is a rotary switch used for detecting the orientation of a stand pivotally attached to a vehicle body by a pivot bolt in a motorcycle with respect to the vehicle body, the housing having a fixed contact, and holding a movable contact, A rotor that is rotatably attached to a housing and that switches between the movable contact and the fixed contact by rotating with respect to the housing as the stand rotates with respect to the vehicle body; and the housing and the rotor A leg portion that is inserted into a bolt insertion hole provided in the first end and screwed into the pivot bolt, and a flange bolt that has a flange sandwiching the housing and the rotor between the stand and the rotor. A shaft portion that surrounds the leg portion between the flange and the pivot bolt; A body portion that surrounds the shaft portion and sandwiches a part of the housing between the flange bolt and the flange, and forms an annular storage space between the housing and the fixed contact and the movable contact A top seal that has a flange portion sandwiched between the flange and the housing and elastically contacts the outer periphery of the shaft portion of the rotor and the inner periphery of the bolt insertion hole of the housing. The top seal has an annular rib that elastically contacts the flange over the entire circumference of the leg portion.

  In the above rotary switch, the housing has a storage recess that forms the storage space between the housing and the outer peripheral surface of the rotor disposed on the opposite side of the storage space across the main body. And a ring-shaped bottom seal that elastically contacts the inner peripheral surface of the housing recess of the housing over the entire circumference, and the rotor has a sandwiching part that sandwiches the bottom seal between the main body part and the bottom part. The seal preferably includes a flange portion sandwiched between the housing and the sandwiching portion, and an annular rib that elastically contacts the sandwiching portion over the entire circumference of the leg portion.

  In the above rotary switch, it is preferable that the bottom seal is made of synthetic rubber and a metal ring is insert-molded, and the rib is made of the synthetic rubber in the bottom seal.

  Furthermore, it is preferable that the top seal is a synthetic rubber in which a metal ring is insert-molded, and the rib in the top seal is made of the synthetic rubber.

  According to the present invention, dust resistance is improved as compared with a case where no rib is provided on the top seal.

It is sectional drawing which shows the principal part of embodiment of this invention. It is a disassembled perspective view which shows the same as the above. It is sectional drawing which shows the principal part of a top seal same as the above. It is sectional drawing which shows the principal part of a bottom seal same as the above. It is a disassembled perspective view which shows the comparative example same as the above. It is a perspective view which shows an example of the usage condition of a rotary switch. It is a disassembled perspective view which shows the conventional rotary switch. It is sectional drawing which shows the same as the above.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS.

  Since the basic configuration of this embodiment is the same as that of the conventional example described with reference to FIGS. 7 and 8, the description of the common parts is omitted. In the following description, the vertical direction is based on FIG. That is, like the definition in the description of the conventional example, the direction in which the rotor 3 and the housing 2 are overlapped is defined as the vertical direction, and the direction away from the vehicle body 6 is called the upward direction.

  As shown in FIG. 2, the movable contact 33 includes a movable contact 331 having a shape that conducts contact between the fixed contact 41 and the connected terminal 42, and interlocking protrusions 332 provided on both sides of the movable contact 331. Have.

  Further, the outer rotor 32 is provided with an interlocking convex portion 35 protruding downward instead of the connecting portion 323. The interlocking convex portion 35 is made of a metal plate that is insert-molded so that one surface in the thickness direction faces the rotation axis with respect to the housing 2. The rotor 3 of this embodiment is interlocked with the stand 7 by inserting the interlocking convex portion 35 into an interlocking hole (not shown) provided in the stand 7.

  Further, as shown in FIG. 3, the top seal 52 protrudes upward from the upper surface of the flange portion 521 (that is, the surface directed to the flange 542), and extends to the lower surface of the flange 542 over the entire circumference of the leg portion 541 of the flange bolt 54. It has an annular rib 522 that is elastically contacted.

  Further, as shown in FIG. 4, the bottom seal 51 has a flange portion 511 that is sandwiched between the housing 2 and the flange portion 322 of the outer rotor 32 in the vertical direction. Further, the bottom seal 51 protrudes below the lower surface (that is, the surface directed toward the flange portion 322) at the flange portion 511 and elastically contacts the upper surface of the flange portion 322 of the outer rotor 32 over the entire circumference of the leg portion 541 of the flange bolt 54. An annular rib 512 is provided.

  According to the above configuration, foreign matters such as mud are present between the inner periphery of the bottom seal 51 and the top seal 52 and the outer periphery of the rotor 3 as compared with the case where the ribs 512 and 522 are not provided on the bottom seal 51 and the top seal 52. Dustproofness is improved because it is difficult to enter.

  Further, as shown in FIG. 5, the bottom seal is compared with the case where the outer rotor 32 is not provided and the rotor 3 is configured only by the inner rotor 31 (that is, when the flange portion 322 that covers the bottom seal 51 as viewed from below is not provided). It is difficult for foreign matter to enter between 51 and the inner rotor 31.

  Further, the bottom seal 51 and the top seal 52 are obtained by insert-molding metal rings 51A and 52A into synthetic rubbers 51B and 52B, respectively. In the bottom seal 51 and the top seal 52, the flange portions 511 and 521 are part of the metal rings 51A and 52A and protrude from the synthetic rubbers 51B and 52B. Further, in the bottom seal 51 and the top seal 52, the portions that contact the inner peripheral surface of the housing 2 and the outer peripheral surface of the rotor 3 are made of synthetic rubbers 51B and 52B. Further, the ribs 512 and 522 are made of synthetic rubbers 51B and 52B. Thereby, compared with the case where the ribs 512 and 522 are formed on the metal rings 51 </ b> A and 52 </ b> A, the ribs 512 and 522 are easily deformed, so that dust resistance is improved.

DESCRIPTION OF SYMBOLS 1 Rotary switch 2 Housing 3 Rotor 6 Car body 7 Stand 8 Pivot bolt 12 Sleeve (A bolt insertion hole is comprised inside)
20 storage recess 33 movable contact 41 fixed contact 51 bottom seal 51A metal ring 51B synthetic rubber 52 top seal 52A metal ring 52B synthetic rubber 54 flange bolt 201 bolt insertion hole 311 main body 312 shaft 322 flange
511 flange part 512 rib 521 flange part 522 rib 541 leg part 542 flange

Claims (4)

A rotary switch used for detecting the orientation of a stand pivotally attached to a vehicle body by a pivot bolt in a motorcycle with respect to the vehicle body,
A housing with fixed contacts;
A rotor that holds the movable contact and is rotatably attached to the housing, and switches between the movable contact and the fixed contact by rotating with respect to the housing as the stand rotates with respect to the vehicle body;
A flange having a leg portion inserted into a bolt insertion hole provided in the housing and the rotor and having one end screwed into the pivot bolt, and a flange sandwiching the housing and the rotor between the stand and the stand With bolts,
The rotor includes a shaft portion surrounding the leg portion between the flange and the pivot bolt, a portion of the housing sandwiched between the flange portion of the flange bolt surrounding the shaft portion, and the fixed contact and the A main body portion configured between the housing and a ring-shaped storage space in which a movable contact is stored;
A top seal that has a flange portion sandwiched between the flange and the housing and elastically contacts the outer periphery of the shaft portion of the rotor and the inner periphery of the bolt insertion hole of the housing;
The top seal has a ring-shaped rib that elastically contacts the flange over the entire circumference of the leg portion. The housing has a storage recess that forms the storage space between the main body and the housing.
An annular bottom seal disposed on the opposite side of the storage space across the main body and elastically contacting the outer peripheral surface of the rotor and the inner peripheral surface of the storage recess of the housing over the entire circumference;
The rotor has a sandwiching part that sandwiches the bottom seal with the main body part,
The said bottom seal has a collar part pinched between the said housing and the said clamping part, and the ring-shaped rib which contact | abuts the said clamping part over the perimeter of the said leg part. Rotary switch. The bottom seal is a synthetic rubber insert-molded metal ring,
The rotary switch according to claim 2, wherein the rib is made of the synthetic rubber in the bottom seal. The top seal is a synthetic rubber insert-molded metal ring,
The rotary switch according to claim 1, wherein the rib is made of the synthetic rubber in the top seal.

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