JP2008084618A - Rotary switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary switch with a manufacturing cost reduced. <P>SOLUTION: The rotary switch includes a housing coupled with a car body with a fixed contact fitted, and a rotor 3 holding a movable contact in and out of contact with the fixed contact, turnably mounted on the housing in a direction for making the movable contact in and out of contact with the fixed contact, and coupled with a stand. The rotor 3 includes a U-shaped coupling part 32c made of synthetic resin and surrounding one end nearer to a turning axis of the stand around the car body within a face where the stand turns around the car body. An inner side face of the coupling part 32c is slanted in a direction approaching toward an end at both ends. Since the rotor 3 is made of synthetic resin, it can save cost as compared with the case in which a metal component is used. Further, by slanting the inner side face of the coupling part 32c, it can be used for a plurality of kinds of bicycles with different positions of rotating axes of stands to the car body and different shapes of stands. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rotary switch.

  2. Description of the Related Art Conventionally, a rotary switch includes a housing provided with a fixed contact, and a rotor that holds a movable contact that is separated from and contacts the fixed contact and is rotatably attached to the housing in a direction that allows the movable contact to be separated from and attached to the fixed contact. Is provided (for example, refer to Patent Document 1).

  For example, as shown in FIGS. 9 and 10, this type of rotary switch 1 is attached to a connecting portion between a vehicle body B and a stand S in a two-wheeled vehicle and used to detect the standing state of the stand S. That is, by preventing the engine from starting when the stand S is in the standing state when the vehicle is stopped, the stand S is prevented from starting in the standing state.

  More specifically, the stand S is pivotally attached to the vehicle body B by bolts S3. The housing 2 includes a main body portion 21 in which a fixed contact (not shown) and a part of the rotor 3 are housed, an electric wire drawing portion 22 from which an electric wire C electrically connected to the fixed contact and the movable contact is drawn, and a vehicle body B. And a pinching portion 23 sandwiching the projection B1 projecting from the wire lead-out portion 22, and is connected to the vehicle body B by sandwiching the projection B1 between the wire lead-out portion 22 and the pinching portion 23. . The rotor 3 is coupled to the stand S by being screwed with a screw SC that is screwed into a screw hole S2 provided in the stand S, and the stand S is rotated with respect to the vehicle body B as indicated by an arrow A1. When the rotor 3 moves, the rotor 3 is rotated with respect to the housing 2 in conjunction with the stand S, and the contact state (separation of the movable contact with respect to the fixed contact) is switched depending on whether or not the stand S is in the standing state. . Further, the stand S is provided with a protrusion S1 protruding in the same direction as the protrusion of the vehicle body B, and the protrusion B1 provided on the vehicle body B and the protrusion S1 provided on the stand S are provided with a connecting spring SP formed of a tension coil spring. The stand S is maintained in one of the standing state when the vehicle is stopped and the retracted state when the vehicle is running by the spring force of the connecting spring SP.

Here, since a force is applied to the screw insertion hole 3a through which the screw SC for screwing to the stand S in the rotor 3 is inserted every time the stand S is displaced, the rotor 3 has a cylindrical shape for reinforcement. The metal part 3b is insert-molded so as to form the inner surface of the screw insertion hole 3a.
JP 2004-231094 A

  However, when the metal part 3b is used in the rotor 3 as in the conventional example, the manufacturing cost is relatively high.

  This invention is made | formed in view of the said reason, The objective is to provide the rotary switch which can reduce manufacturing cost.

  The present invention relates to a rotary switch used for detecting the orientation of a stand with respect to a vehicle body of a two-wheeled vehicle, and includes a housing provided with a fixed contact and connected to the vehicle body, and a movable contact that is separated from and connected to the fixed contact. A rotor that is pivotably mounted in a direction to move the movable contact to and away from the fixed contact, and is connected to the stand. The rotor is made of synthetic resin, and one end of the stand near the pivot axis of the stand relative to the vehicle body is attached to the vehicle body. On the other hand, it has a U-shaped connecting portion that encloses the surface in which the stand rotates, and the inner side surfaces of the connecting portion are inclined in directions toward each other at both ends.

  According to the present invention, it is possible to switch from a metal part to a molded part by forming a U-shape to increase strength and sandwiching from both sides in the vicinity of the U-shaped opening, and by providing a gap It is possible to absorb the dispersion of parts and the eccentricity of the stand, and it can be used for a plurality of types of two-wheeled vehicles having different positions of the rotation axis of the stand with respect to the vehicle body and the shape of the stand. Furthermore, since it can comprise with a molded article and it is not necessary to embed a metal component like the past, manufacturing cost can be reduced.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  As shown in FIGS. 2 and 3, the rotary switch 1 of the present embodiment includes a housing 2 and a rotor 3 that is rotatably supported with respect to the housing 2. The housing 2 holds fixed contacts 41A and 41B (see FIG. 4), and the rotor 3 is provided with a movable contact 42 that contacts and separates from the fixed contacts 41A and 41B when the rotor 3 rotates relative to the housing 2. Yes. Hereinafter, the upper and lower sides will be described with reference to FIG.

  As shown in FIGS. 2 and 3, the rotary switch 1 of the present embodiment includes a housing 2 and a rotor 3 that is rotatably supported with respect to the housing 2. The housing 2 holds fixed contacts 41A and 41B (see FIG. 4), and the rotor 3 is provided with a movable contact 42 that contacts and separates from the fixed contacts 41A and 41B when the rotor 3 rotates relative to the housing 2. Yes. Hereinafter, the upper, lower, left and right will be described based on FIG.

  The housing 2 includes a bottomed cylindrical main body portion 21 in which a housing recess 20 in which a part of the rotor 3 is accommodated is opened on the upper surface, and a wire drawing portion 22 and a sandwiching portion 23 similar to those of the conventional example.

  As shown in FIG. 4, each of the fixed contacts 41 </ b> A and 41 </ b> B is made of, for example, metal and has an arc shape that is flat vertically, and is arranged along the inner peripheral surface of the storage recess 20 with respect to the inner bottom surface of the storage recess 20. It is fixed. In each of the fixed contacts 41A and 41B, the end edge in the direction along the inner periphery of the storage recess 20 and the end edge on the side away from the protrusion 51b of the connected terminal 51 is the side close to the inner surface of the storage recess 20 A rectangular cutout 40 is provided at each of the ends. Further, the inner bottom surface of the storage recess 20 is made of a conductive material such as metal and has an annular shape that is flat and concentric with the fixed contacts 41A and 41B, and is located inside the fixed contacts 41A and 41B. A to-be-connected terminal 51 having a main body 51a and a protruding portion 51b extending to the inner peripheral surface of the housing recess 20 and positioned between the fixed contacts 41A and 41B is fixed. Further, on the inner bottom surface of the housing recess 20, grooves 20b are provided between the connected terminal 51 and each of the fixed contacts 41A and 41B and between the fixed contacts 41A and 41B for securing a creepage distance. Yes.

  The rotor 3 is made of synthetic resin and is connected to a movable contact 42 via a movable contact 33 described later, and is housed in the housing recess 20. The rotor 3 is made of synthetic resin and mechanically coupled to the inner rotor 31 and is housed in the housing recess 20. And an outer rotor 32 disposed across the inner and outer sides.

  The inner rotor 31 has an annular main body 31a that is flat in the vertical direction, a cylindrical shape that allows the upper and lower sides of the main body 31a to communicate with each other, a shaft 31b that protrudes from both the upper and lower sides of the main body 31a, and a lower surface of the main body 31a. And a cylindrical coupling portion 31c projecting from the front.

  An annular movable contact 33 made of a conductive material such as metal and surrounding the shaft portion 31b is attached to the lower surface of the main body portion 31a. A plurality (three in the figure) of interlocking holes 33d are vertically provided in the movable contact 33, and interlocking protrusions 31d are protruded downward on the lower surface of the main body 31a of the inner rotor 31, and the interlocking holes 33d are provided. Since the interlocking protrusions 31d are respectively inserted into the movable contactor 33, the movable contactor 33 rotates in conjunction with the inner rotor 31. Three contact pressure springs 34 each formed of a coil spring are provided on the upper surface of the movable contact 33 with a position shifted by 120 ° when viewed from below. The contact pressure spring 34 is provided on the main body portion 31 a of the inner rotor 31. The movable contact 33 is biased downward with respect to the inner rotor 31 by elastically contacting the lower surface. As shown in FIG. 5, a movable contact 42 is provided at one of the three locations below the contact pressure spring 34 on the lower surface (upper surface in FIG. 5) of the movable contact 33, and the remaining two locations are respectively provided. Two connection terminals 52 that elastically contact the connected terminals 51 are provided. That is, of the fixed contacts 41 </ b> A and 41 </ b> B, the contact of the movable contact 42 is electrically connected to the connected terminal 51 via the movable contact 33. The electric wire C drawn out from the electric wire drawing portion 22 provided in the housing 5 has, for example, three core wires (not shown), and these core wires are connected to each fixed contact 41A, 41B and the connected terminal 51. They are electrically connected one by one. Further, the contact pressure of the movable contact 42 and the contact pressure of the connection terminal 52 with respect to the fixed contacts 41 </ b> A and 41 </ b> B are ensured by the spring force of the contact pressure spring 34. Here, the movable contact 42 is provided slightly outside the connection terminal 52.

  As shown in FIGS. 6 to 8, the outer rotor 32 includes a bottomed cylindrical main body portion 32a having an open top surface, a flange portion 32b protruding outward from the upper end of the main body portion 32a, and a peripheral edge of the flange portion 32b. And a U-shaped connecting portion 32c that protrudes upward.

  The outer rotor 32 is joined to the inner rotor 31 as shown in FIG. 1 by welding with, for example, ultrasonic waves or lasers, with the main body portion 32a being inserted into the coupling portion 31c of the inner rotor 31. An insertion hole 32 d into which the shaft portion 31 of the inner rotor 31 is inserted is vertically provided in the bottom surface of the main body portion 32 a of the outer rotor 32. Further, both ends of the connecting portion 32 c of the outer rotor 32 sandwich one end pivotally attached to the vehicle body B in the stand S, whereby the rotor 3 is interlocked with the rotation of the stand S. Here, compared with the both ends which are the site | parts which contact | abut to the stand S in the connection part 32c, in order to provide a clearance gap between the stands S, the center part is formed thinly. Moreover, the inner side surfaces (surfaces facing each other at the end portions of the connecting portion 32) of both ends of the connecting portion 32c are inclined in a direction approaching each other toward the end.

  In addition, in the storage recess 20, rainwater enters between the upper surface of the main body portion 31 a of the inner rotor 31 and the lower surface of the flange portion 32 b of the outer rotor 32 through the gap between the rotor 3 and the housing 2. A first oil seal 61 is disposed to prevent the lubricant such as grease from flowing out. Further, an annular slide made of metal is provided between the main body 31 a of the inner rotor 31 and the first oil seal 61 in order to reduce friction between the inner rotor 31 and the first oil seal 61. A plate 62 is arranged.

  Furthermore, a circular insertion hole 20 a is provided in the center of the bottom surface of the storage recess 20. On the lower surface of the housing 2, a ring-shaped surrounding projection 21 a surrounding the insertion hole 20 a is projected downward. The shaft portion 31b of the inner rotor 31 is inserted into the insertion hole 20a, and the rotor 3 is pivotally supported with respect to the housing 2 here. A screw SC that is screwed into a screw hole (not shown) provided in the stand S is inserted into the shaft portion 31b of the inner rotor 31. The screw SC has a flange portion SC1 that is dimensionally shaped and cannot be inserted into the insertion hole 20a and is located on the lower side of the housing 2.

  Further, between the inner peripheral surface of the insertion hole 20 a and the shaft portion 31 b of the inner rotor 31, an annular shape is used to prevent rainwater from entering through the gap between the rotor 3 and the housing 2 and outflow of lubricant. Two oil seals 63 are arranged. One end of the second oil seal 63 in the axial direction and at one end on the outer side is provided with a flange portion 63a protruding outward in the radial direction, and the flange portion 63a is connected to the lower surface of the housing 2 and the upper surface of the cap 35. The second oil seal 63 is prohibited from being displaced in the vertical direction with respect to the housing 2.

  Further, on the inner bottom surface of the storage recess 20, a cylindrical tube protrusion 21 b surrounding the insertion hole 20 a is projected upward. The connected terminal 51 and the fixed contacts 41A and 41B are respectively held in the housing 2 by insert molding, and the connected terminal 51 has the inner peripheral edge of the main body 51a entering the cylindrical protrusion 21b. The outer end portions of 41 </ b> B enter the inner peripheral surface of the storage recess 20.

  According to the said structure, since the rotor 3 consists of synthetic resins, manufacturing cost can be reduced compared with the case where a metal component is used for the connection site | part with the stand S like a prior art example.

  Moreover, the connection part 32c is made into the U shape where the part (both ends) which pinches | interposes the stand S was connected, compared with the case where the connection part 32c is comprised only in the part which pinches | interposes the stand S. Mechanical strength is improved.

  Further, since the inner surface of the connecting portion 32c is inclined, a gap is formed between the inner surface of the connecting portion 32 and the stand S. Therefore, the position of the rotation shaft of the stand S relative to the vehicle body B and the shape of the stand S are determined. It can be used for different types of motorcycles.

It is a perspective view which shows the rotor of embodiment of this invention. It is sectional drawing which shows the same as the above. It is a disassembled perspective view which shows the same as the above. It is a top view which shows the principal part of a housing same as the above. It is a perspective view which shows a movable contact same as the above. It is a perspective view which shows an outer rotor. (A) and (b) each show an outer rotor, (a) is a top view, (b) is a bottom view. It is AA sectional drawing of Fig.7 (a). It is a perspective view which shows the usage type of a rotary switch. It is explanatory drawing which shows the attachment method of the conventional rotary switch to a two-wheeled vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotary switch 2 Housing 3 Rotor 32c Connection part 41A, 41B Fixed contact 42 Moving contact

Claims (1)

A rotary switch used to detect the orientation of a stand relative to the body of a motorcycle,
A housing that is provided with a fixed contact and is connected to the vehicle body, and a movable contact that is attached to and detached from the fixed contact is held, and is rotatably attached to the housing in a direction that allows the movable contact to be attached to and detached from the fixed contact. With a rotor,
The rotor is made of synthetic resin, and has a U-shaped connecting portion that encloses one end portion of the stand near the rotation axis of the stand with respect to the vehicle body within a plane in which the stand rotates with respect to the vehicle body,
A rotary switch characterized in that the inner side surfaces of the connecting portion are inclined toward each other toward the ends at both ends.

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