JP2013243044A - Rotary switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary switch capable of reducing manufacturing cost.
SOLUTION: A housing 2 connected to a vehicle body by holding a fixed contact 41 and a connected terminal 42 one by one, and rotating within a predetermined movable range with respect to the housing 2 as the stand rotates with respect to the vehicle body. And a rotor. The fixed contact 41 and the connected terminal 42 are respectively brought into contact with the movable contact 33 when the rotor is at one end of the movable range, and are in contact with the movable contact 33 when the rotor is at the other end of the movable range. do not do. The manufacturing cost can be reduced as compared with the case where a plurality of fixed contacts 41 are provided and used as a changeover switch, or when the connected terminal 42 is always in contact with the movable contact 33.
[Selection] Figure 1

Description

  The present invention relates to a rotary switch.

  Conventionally, a housing provided with a fixed contact, a rotor that holds a movable contact that comes in contact with the fixed contact, and that is rotatably attached to the housing in a direction to make the movable contact come in contact with the fixed contact. (For example, refer patent document 1).

  For example, as shown in FIG. 10, this type of rotary switch 1 is attached to a connecting portion between a vehicle body 6 (strictly, a part called a bracket of 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. 11 and 12, the rotary switch 1 includes a housing 2 coupled to the vehicle body 6 side and a rotor 3 coupled to the housing 2 so as to be rotatable and interlocked with the stand 7. There is. The housing 2 holds a fixed contact 41, and the rotor 3 is provided with a movable contact 331 that contacts with the fixed contact 41 when the rotor 3 rotates with respect to the housing 2. That is, depending on whether or not the stand 7 is in a standing state, the relative position of the housing 2 and the rotor 3 changes, and accordingly, the separation of the movable contact 331 and the fixed contact 41 is switched. The state of the stand 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 the 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, the fixed contact 41 and the movable contact 331. The output lead 22 from which the electric wire 11 is drawn out, and the pinching part 23 that sandwiches the convex 61 (see FIG. 10) provided on the vehicle body 6 between the output lead 22.

  On the inner bottom surface of the housing recess 20, as shown in FIG. 13, there are two fixed contacts 41 having an arc shape centering on the rotation axis of the rotor 3 with respect to the housing 2 and having a common inner diameter and outer diameter, A to-be-connected terminal 42 which is made of a metal plate whose vertical direction is directed in the vertical direction and has an annular shape centering on the rotation axis of the rotor 3 with respect to the housing 2 and whose outer diameter is smaller than the inner diameter of the stationary contact 41 is held. ing. 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 part 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 one to one. The core wire is electrically connected to the corresponding one of the fixed contacts 41 and the connected terminal 42.

  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 first oil seal 51 is disposed between the lower surface of the main body 311 of the inner rotor 31 and the upper surface of the flange 322 of the outer rotor 32 in the housing recess 20. The first oil 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 the gap between the rotor 3 and the housing 2 and outflow of lubricant such as grease. Is. Further, an annular sliding plate 53 made of metal is provided between the main body 311 of the inner rotor 31 and the first oil seal 51 in order to reduce friction between the inner rotor 31 and the first oil seal 51. Is arranged.

  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.

  A fixing bolt 54 for attaching the rotor 3 to the stand 7 is inserted through 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, and the fixing bolt 54 is screwed into a screw hole 81 provided in the pivot bolt 8, for example. By doing so, it mechanically couples to the stand 7. The head (upper end) of the fixing bolt 54 cannot be inserted into the insertion hole 201 of the housing 2, and the falling of the housing 2 is prevented by the fixing bolt 54. That is, the housing 2 and the rotor 3 are fixed together by the fixing bolt 54.

  Furthermore, an annular second oil 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 second oil 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 that a gap between the inner peripheral surface and the outer peripheral surface is obtained. This prevents the intrusion of rainwater and the outflow of lubricant.

  Further, on the inner bottom surface of the storage recess 20, a cylindrical tube projection 211 surrounding the insertion hole 201 projects downward. The inner periphery 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 2007-196823 A

  Here, the relationship between the contact state and the state of the stand 7 varies depending on whether the rotary switch 1 is mounted on the left or right side with respect to the traveling direction of the vehicle body 6. For example, when the rotary switch 1 is attached to the left side of the vehicle body 6, the fixed contact 41 that is in contact with the movable contact 33 in the standing state of the stand 7 is used when the rotary switch 1 is attached to the right side of the vehicle body 6. Is in contact with the movable contact 33 in the retracted state of the stand 7 without contacting the movable contact 33 in the standing state of the stand 7. Conventionally, of the two fixed contacts 41, only one fixed contact 41 that is turned on when the stand 7 is in the standing state is connected to the external circuit.

  However, the conventional rotary switch 1 is a so-called changeover switch having two fixed contacts 41 due to its structure, which increases the number of parts and increases the manufacturing cost. In addition, when a short circuit occurs between the stationary contacts 41, the state of the stand 7 cannot be detected correctly.

  Further, since the connected terminal 42 has a ring shape, when the connected terminal 42 is formed by punching, there are many parts to be removed, such as a range surrounded by the connected terminal 42, and there is a lot of material loss. It was.

  The present invention has been made in view of the above-described reasons, and an object thereof is to provide a rotary switch capable of reducing the manufacturing cost.

  The present invention is a rotary switch used for detecting the orientation of a stand with respect to a vehicle body of a two-wheeled vehicle, and holds a housing connected to the vehicle body and a movable contact, and is rotatable within a predetermined movable range with respect to the housing. And a rotor that rotates with respect to the housing as the stand rotates with respect to the vehicle body, and the housing is in contact conduction with the movable contact respectively when the rotor is at one end of the movable range. And when the said rotor is in the other end of the said movable range, the fixed contact and the to-be-connected terminal which do not contact the said movable contact are hold | maintained one each.

  In the rotary switch described above, it is preferable that the fixed contact and the connected terminal are provided with convex portions that contact the movable contact, respectively.

  Further, in the above rotary switch, the fixed contact and the connected terminal are each insert-molded in the housing, and the housing has a recess sandwiched between the fixed contact and the connected terminal. It is desirable to be provided.

  Furthermore, in the rotary switch described above, it is preferable that a groove is provided between a portion in contact with the fixed contact and a portion in contact with the connected terminal in the movable contact.

  According to the present invention, the number of parts is reduced as compared with the case where a plurality of fixed contacts are provided and used as a changeover switch, and the connected terminal is compared with the case where the connected terminal is always in contact with the movable contact. Therefore, the manufacturing cost can be reduced.

(A) (b) is a bottom view which shows the principal part of embodiment of this invention, respectively, (a) (b) shows the state from which the position of the rotor with respect to a housing differs mutually. It is a disassembled perspective view which shows the same as the above. It is a perspective view which shows a movable contact same as the above. It is the partially broken perspective view which shows the principal part same as the above. It is the partially broken perspective view which shows the principal part of the example of a change same as the above. It is the partially broken perspective view which shows the principal part of another modified example same as the above. It is a perspective view which shows the movable contact in another modified example same as the above. It is the perspective view which fractured | ruptured partially which shows the principal part of the example of FIG. It is sectional drawing which shows the principal part of another example of a change 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. It is a bottom view which shows a housing 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. 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.

  The movable contact 33 includes a movable contact 331 having a shape in which the contact is conducted across the fixed contact 41 and the connected terminal 42, and interlocking protrusions 332 provided on both sides of the movable contact 331.

  One fixed contact 41 and one connected terminal 42 are provided, and each has a circular arc shape along the inner peripheral surface of the housing recess 20 as shown in FIG. That is, this embodiment is not a changeover switch as in the conventional example but a so-called on / off switch. Specifically, the angular ranges occupied by the stationary contact 41 and the connected terminal 42 are about 90 ° around the rotation axis of the rotor 3 with respect to the housing 2. Although the above angle range may be made larger, it is desirable to make the above angle range as small as possible from the viewpoint of reducing material costs. When the rotor 3 is at one end of the movable range with respect to the housing 2 (clockwise end in FIG. 1), the movable contact 33 is brought into contact with the fixed contact 41 and the connected terminal 42, respectively. In this state, the electrical connection between the fixed contact 41 and the connected terminal 42 is turned on by the intervention of the movable contact 33. Further, when the rotor 3 is at the other end of the movable range with respect to the housing 2 (counterclockwise end in FIG. 1), the movable contact 33 does not contact either the fixed contact 41 or the connected terminal 42. . In this state, the electrical connection between the stationary contact 41 and the connected terminal 42 is turned off.

  According to the above configuration, the manufacturing cost can be reduced because the number of parts is reduced as compared with the case where the changeover switch has two fixed contacts 41 as in the conventional example.

  In addition, unlike a conventional change-over switch, since a defect due to a short circuit between the fixed contacts 41 does not occur, reliability is improved as compared with the conventional example.

  Further, in the present embodiment, the connected terminal 42 is formed in an arc shape so that the timing of separation / contact with respect to the movable contact 33 coincides with the fixed contact 41, and the movable contact 33 is connected to the fixed contact 41 and the connected terminal. Only the dimensions that span between 42 and 42 are secured. That is, less material is required for the movable contact 33 and the connected terminal 42 than when the connected terminal 42 has an annular shape and the movable contact 33 has an annular shape as in the conventional example. Therefore, it is possible to reduce the manufacturing cost. In addition, since the connected terminal 42 has an arc shape, the loss of material when the connected terminal 42 is formed by punching compared to the case where the connected terminal 42 has an annular shape as in the conventional example. This can also reduce the manufacturing cost.

  Note that the movable contact 33 does not necessarily need to be simultaneously connected to the fixed contact 41 and the connected terminal 42, and the connected terminal 42 may be extended from the fixed contact 41. In this case, the movable contact 33 is not in contact with either the fixed contact 41 or the connected terminal 42, and the fixed contact 41 and the connected terminal 42 are electrically connected via the movable contact 33. In this state, only the connected terminal 42 is in contact with the movable contact 33. However, from the viewpoint of saving the material of the connected terminal 42, the dimension and shape of the connected terminal 42 may be designed so that the timing of the separation / contact with respect to the movable contact 33 is as simultaneous as possible with the fixed contact 41. desirable.

  Further, instead of arranging the connected terminal 42 on the inner peripheral side (position closer to the rotation axis) than the fixed contact 41 as described above, the connected terminal 42 is arranged on the outer peripheral side (from the rotation axis). You may arrange | position in a distant position.

  Here, grease is applied between the housing 2 and the rotor 3 so that the rotor 3 can operate smoothly with respect to the housing 2. This grease also adheres to the movable contact 33. As shown in FIG. 4, the grease 9 mixed with metal powder generated by wear of the movable contact 33, the fixed contact 41, and the connected terminal 42 is fixed in contact with one end of the movable range of the movable contact 33. If it accumulates in a form straddling the child 41 and the connected terminal 42, a short circuit may occur through the grease 9.

  Therefore, in the movable contact 33, it is desirable to prevent the portion between the portion that is in contact with the fixed contact 41 and the portion that is in contact with the connected terminal 42 from contacting the housing 2 as much as possible.

  Specifically, for example, as shown in FIG. 5, convex portions 411 and 421 with which the movable contactor 33 contacts are provided on the fixed contactor 41 and the connected terminal 42, respectively. The convex portions 411 and 421 as described above can be formed by embossing, for example. That is, a concave portion is relatively formed between the convex portions 411 and 421, and contact with the movable contact 33 is avoided in the concave portion. The convex portions 411 and 421 are desirably provided at least at a position where the movable contactor 33 contacts when the rotor 3 is at one end of the movable range with respect to the housing 2 (ON side end).

  Alternatively, as shown in FIG. 6, a recess 202 is provided in the housing 2 at a portion sandwiched between the fixed contact 41 and the connected terminal 42. It is desirable that the concave portion 202 is provided at least at a portion sandwiched between portions where the movable contactor 33 comes into contact when the rotor 3 is at one end (ON side end) of the movable range with respect to the housing 2.

  Alternatively, as shown in FIGS. 7 and 8, in the movable contact 33, instead of the movable contact 331 straddling the fixed contact 41 and the connected terminal 42 as described above, the fixed contact 41 and the covered contact are separated from each other. You may provide the two contact convex parts 334 which carry out contact conduction | electrical_connection one by one with the connection terminal 42. FIG. That is, between the contact protrusions 334, grooves that are recessed relative to the contact protrusions 334 and are opened on both sides in the operation direction of the movable contactor 33 are formed, and contact with the housing 2 is avoided in these grooves. . Note that a plurality of the contact projections 334 may be provided for one or both of the fixed contact 41 and the connected terminal 42. In short, a groove that avoids contact with the housing 2 may be formed between a portion that contacts the fixed contact 41 and a portion that contacts the connected terminal 42 in the movable contact 331.

  Furthermore, you may employ | adopt combining the said various change. For example, as shown in FIG. 9, convex portions 411 and 421 are provided on the stationary contact 41 and the connected terminal 42, and the concave portion 202 is provided on the housing 2.

  If the above-described configuration is adopted, the above-described grease may be used as compared with the case where the movable contactor 33 always contacts the housing 2 at a portion between the portion that contacts the fixed contact 41 and the portion that contacts the connected terminal 42. 9 is less likely to cause a short circuit.

  Here, in the fixed contact 41 and the connected terminal 42, it is difficult to ensure the dimensional accuracy when the convex portions 411 and 421 are formed by embossing. In such a case, the protrusions 411 and 421 are first contacted with the movable contact 33 at the fixed contact 41 or the connected terminal 42 (the end in the counterclockwise direction in FIG. 1. In the case of insert molding, a gap is generated between the vicinity of the distal end of the fixed contact 41 or the connected terminal 42 and the die, so that the distal end of the fixed contact 41 or the connected terminal 42 is provided. The vicinity may be buried in the synthetic resin. When the above-described burial occurs, an error occurs in the rotation angle at which the contact is switched on and off. Therefore, in order to avoid the occurrence of the error as described above, in the fixed contact 41 and the connected terminal 42, at least the vicinity of the tip has a shape (for example, a flat shape) that can ensure close contact with the mold. It is desirable.

DESCRIPTION OF SYMBOLS 1 Rotary switch 2 Housing 3 Rotor 33 Movable contact element 41 Fixed contact 42 Connected terminal 202 Recessed part 334 Contact convex part (A part which contacts a fixed contact or a connected terminal in a movable contact)
411 Convex part 421 Convex part

Claims (4)

A rotary switch used to detect the orientation of a stand relative to the body of a motorcycle,
A housing connected to the vehicle body; a rotor that holds a movable contact and is rotatably attached to the housing within a predetermined movable range; and a rotor that rotates relative to the housing as the stand rotates relative to the vehicle body. With
The housing includes a stationary contact that is electrically connected to the movable contact when the rotor is at one end of the movable range, and that does not contact the movable contact when the rotor is at the other end of the movable range. A rotary switch characterized in that one connected terminal is held at a time.   The rotary switch according to claim 1, wherein each of the fixed contact and the connected terminal is provided with a convex portion that contacts the movable contact. Each of the fixed contact and the connected terminal is insert-molded in the housing,
The rotary switch according to claim 1, wherein the housing is provided with a recess sandwiched between the fixed contact and the connected terminal. 4. The groove according to claim 1, wherein a groove is provided between a portion in contact with the fixed contact and a portion in contact with the connected terminal. The rotary switch according to item.

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