JP2019153486A - Rotary switch - Google Patents

Abstract

To provide a rotary switch capable of smoothly performing sliding between a housing and a movable body.SOLUTION: A rotary switch of the present disclosure includes: a first housing; a second housing which is joined so as to form a space with the first housing; a movable body which is provided in the space and capable of being rotated around a shank; a fixed contact which is provided on a first surface of the first housing facing the space; a movable contact provided on the movable body and in contact with or separated from the fixed contact; and lubricant provided in the space. The second housing is opposite to a first surface via the space and has a second surface which is a sliding surface on which the movable body slides. The second surface has a recess on the sliding surface.SELECTED DRAWING: Figure 5

Description

  The present disclosure relates to a rotary switch, and more particularly, to a rotary switch in which a movable contact is in contact with or separated from a pair of fixed contacts.

  A neutral start switch mounted on a vehicle and used for detecting a selection range of a shift lever is disclosed (for example, see Patent Document 1).

  A conventional switch includes a switch case in which a base and a lid are overlapped, a movable plate provided inside the switch case, a movable contact disposed on a surface facing the base of the movable plate, and a movable contact on the base. A fixed contact disposed at the facing portion of the substrate and grease. The movable body has a shaft hole and rotates around the shaft hole. At this time, the surface of the switch case lid facing the movable plate and the surface of the movable plate facing the lid slide. In the conventional switch, the sliding surface facing the movable platen of the lid is a flat surface.

JP2013-242982A

  In the conventional switch, the grease provided inside the switch case may be unevenly distributed at the end of the internal space of the switch case due to the rotation of the movable platen. Therefore, in the conventional switch, there is a possibility that the lubricating effect is difficult to obtain on the sliding surface between the movable platen and the lid, and the movable plate is difficult to slide. Even when grease is not used, if the wear between the sliding surface and the movable plate is uneven, sliding of the movable plate may be hindered.

  An object of this indication is to provide the rotary switch which can perform sliding between a housing | casing and a movable body smoothly.

  A rotary switch according to the present disclosure is provided in a first casing, a second casing that is joined to the first casing so as to provide a space, and rotates about a shaft portion. Movable body, fixed contact provided on the first surface of the first housing facing the space, movable contact provided on the movable body and contacting or separating from the fixed contact, and provided in the space And a lubricant to be provided. The second housing is opposed to the first surface through a space, and has a second surface that is a sliding surface on which the movable body slides. The second surface has a recess on the sliding surface. Have.

  In addition, another rotary switch according to the present disclosure includes a first casing, a second casing that is joined to provide a space with the first casing, and a shaft that is provided in the space and has a shaft portion as a center. A movable body that is capable of rotating, a fixed contact provided on the first surface of the first housing facing the space, a movable contact provided on the movable body and contacting or separating from the fixed contact; Is provided. The second housing is opposed to the first surface through a space and has a second surface that is a sliding surface on which the movable body slides, and the second surface has a groove on the sliding surface. The groove is different from the locus of rotation of the movable body.

The rotary switch according to the present disclosure can smoothly slide between the housing and the movable body.

FIG. 1 is a perspective view of a rotary switch according to the present embodiment. FIG. 2 is an exploded perspective view of the rotary switch according to the present embodiment. FIG. 3 is a perspective view showing a sliding surface of the second housing according to the present embodiment. FIG. 4 is a perspective view showing another sliding surface of the second housing according to the present embodiment. FIG. 5 is a perspective view showing another sliding surface of the second housing according to the present embodiment. FIG. 6 is a perspective view showing another sliding surface of the second housing according to the present embodiment.

  The embodiment described below is merely an example of the present invention, and the present invention is not limited to the embodiment, and other embodiments may be used without departing from the technical idea of the present invention. For example, various changes can be made according to the design and the like.

(Embodiment)
The rotary switch 1 in this embodiment is demonstrated using FIGS.

  In the present embodiment, the direction in which a body C2 and a cover C3, which will be described later, are arranged will be described as an up and down direction (see FIG. 2). 1 to 6 show an arrow indicating a vertical direction, this arrow is merely described for the purpose of assisting the explanation, and does not involve an entity. Further, the definition of the above direction is not intended to limit the usage pattern of the rotary switch 1 of the present embodiment.

  As shown in FIGS. 1 and 2, the rotary switch 1 of the present embodiment includes a contact device A1, a housing C1, and a movable body 7.

  The housing C1 has a body C2 (first casing) and a cover C3 (second casing) each made of a synthetic resin molded product formed in a substantially sector shape. A space 100 is formed inside by joining the body C2 and the cover C3. The cover C3 has a bottom surface C31 (second surface) facing the bottom surface C21 (first surface) inside the body C2 through the space 100 inside. The movable body 7 is rotatably housed in the space 100.

  The movable body 7 includes a cylindrical shaft portion 8 and a main body 9 projecting from the outer peripheral surface of the shaft portion 8 in the horizontal direction (a direction perpendicular to the vertical direction). The main body 9 is provided with a concave portion on a surface 7A (the lower surface in FIG. 2, the third surface) facing the body C2, and the concave portion is elastically biased toward the body C2 by the coil spring 2. The contact 3 is accommodated. In FIG. 2, one movable contact 3 is shown.

  The body C2 and the cover C3 are formed in a flat and substantially fan shape with one surface opened. Further, bearing holes 10 and 11 through which the shaft portion 8 of the movable body 7 is inserted and pivotally supported so that the movable body 7 can pivot freely are inserted in portions corresponding to the main parts of the fan of the body C2 and the cover C3. Direction). A plurality of fixed contacts 4, a plurality of conductor plates 5, and a plurality of ribs 6 are disposed on the bottom surface C21 (first surface) inside the body C2. The plurality of conductor plates 5 are electrically connected to the plurality of fixed contacts 4, respectively. In other words, each of the plurality of conductor plates 5 has a corresponding fixed contact 4. A plurality of conductor plates 5 having corresponding fixed contacts 4 are insert-molded in the body C2. Each fixed contact 4 is arranged in a concentric arc shape with the rotation axis of the movable body 7 as the center, and faces the movable contact 3. Each rib 6 is formed in a strip shape, and its height is higher than that of the fixed contact 4.

A connector part 13 surrounded by a peripheral wall and formed in a cylindrical shape is formed integrally with the body C2. On the inner bottom surface of the connector portion 13, one or more plate-like connector terminals (not shown) in which the tips of the plurality of conductor plates 5 protrude in the horizontal direction are formed.

  The contact device A1 includes a plurality of fixed contacts 4, a plurality of conductor plates 5, and connector terminals. The contact device A1 electrically opens and closes at least a pair of connector terminals among the plurality of connector terminals.

  In the rotary switch 1, when the movable body 7 rotates about the shaft portion 8, the movable contact 3 also rotates about the shaft portion 8. At this time, the movable contact 3 slides on the upper surface of the rib 6 or presses the pair of fixed contacts 4 arranged in parallel between two adjacent ribs 6 on the same circumference by the coil spring 2. That is, the movable contact 3 selectively contacts or separates each fixed contact 4 according to the rotational position of the movable body 7. Thereby, the rotary switch 1 can electrically open and close between terminals with respect to the group of several connector terminals arranged in parallel according to the rotation position of the movable body 7.

  A signal corresponding to the rotational position of the movable body 7 is connected to the connector unit 13 by selectively moving or releasing each fixed contact 4 by the movable contact 3 according to the rotational position of the movable body 7. Can be output to an external device.

  FIG. 3 is a perspective view showing the bottom surface C31 of the cover C3. The bottom surface C31 (second surface) of the cover C3 faces the surface 7B (upper surface in FIG. 2) opposite to the surface 7A on which the movable contact 3 of the movable body 7 is provided. The movable body 7 slides and rotates on the bottom surface C31 of the cover C3. That is, the bottom surface C31 of the cover C3 and the surface 7B (fourth surface) of the movable body 7 are sliding surfaces.

  A lubricant 101 is provided in the space 100 of the rotary switch 1. Specifically, the lubricant 101 is provided between the second surface C31 and the fourth surface 7B. By using the lubricant 101, the rotary switch 1 can smoothly rotate the movable body 7 on the sliding surface between the cover C3 and the movable body 7. The lubricant 101 is, for example, synthetic oil grease.

  The cover C3 has a recess 41 on the second surface C31 that is a sliding surface. The recess 41 has a bottom surface lower than the sliding surface. The shape of the recess 41 is, for example, a circle. The diameter of the circular recess 41 is, for example, 3 mm, and the depth is 0.4 mm. In addition, the width | variety, depth, etc. of the recessed part 41 are not limited to this value.

  The recess 41 provided in the second surface C31 can accommodate the lubricant 101. The lubricant 101 held in the recess 41 is supplied to the sliding portion between the cover C3 and the movable body 7 by the rotation of the movable body 7. Therefore, the lubricant 101 can be held between the movable body 7 and the bottom surface C31 of the cover C3, and the rotary switch 1 can smoothly rotate the movable body 7.

Further, when the cover C3 is manufactured by injection molding, the bottom surface of the concave portion 41 may be an ejector pin installation portion on which an ejector pin for removing the molded product from the mold hits. That is, the bottom surface of the recess 41 provided on the second surface C31 of the cover C3 of the rotary switch 1 may have a pin mark 41A. The shape of the pin mark 41A depends on the shape of the pin, but is circular, for example. In injection molding, when the molded product is removed from the mold, it is necessary to apply the ejector pin to the second surface C31, which is a sliding surface. . The burr on the sliding surface is a cause of hindering the sliding of the movable body 7. Therefore, by applying the ejector pin to the bottom surface of the recess 41 that is lower than the sliding surface, no burr due to the ejector pin occurs on the sliding surface. it can.

  FIG. 4 is a perspective view showing another example of the bottom surface C31 of the cover C3. The recess provided in the second surface C31 of the cover C3 is a groove 42. The groove 42 has a bottom surface lower than the sliding surface. On the bottom surface C31 of the cover C3, two grooves 42 are provided in the outermost peripheral portion and the intermediate portion. The groove 42 and the sliding surface have the lubricant 101. The pattern of the groove 42 is, for example, an arc centered on the shaft portion 8 when the cover C3 is viewed from the body C2. The width of the groove 42 is, for example, 3 mm, and the depth is 0.4 mm. The width, depth, number, etc. of the grooves 42 are not limited to this value.

  The pattern of the groove 42 shown in FIG. 4 is the same as the locus drawn by the rotation of the movable body 7. The groove 42 is provided from one end C31A to the other end C31B of the second surface C31 of the cover C3. Since the groove 42 is provided from one end C31A to the other end C31B of the bottom surface C31 of the cover C3, one of the lubricant collected at the end of the space 100 between the body C2 and the cover C3. The part is carried through the groove 42 to the sliding surface. Thereby, the rotary switch 1 can supply the lubricant 101 stably to the sliding surface, and the movable body 7 can smoothly rotate. The bottom surface of the groove 42 may have a pin mark 42A.

  FIG. 5 is a perspective view showing another example of the bottom surface C31 of the cover C3. The recess provided in the second surface C31 of the cover C3 is a groove 43. The groove 43 has a bottom surface lower than the sliding surface. The groove 43 and the sliding surface have the lubricant 101. The pattern of the groove 43 is a straight line. Two straight grooves 43 are provided on the first surface C31. The width of the groove 43 is 3 mm, for example, and the depth is 0.4 mm. The width, depth, number, etc. of the grooves 43 are not limited to this value.

  The groove 43 shown in FIG. 5 is provided from one end C31A to the other end C31B of the second surface C31 of the cover C3. Since the groove 42 is provided from one end C31A to the other end C31B of the bottom surface C31 of the cover C3, the lubricant collected at the end of the space 100 between the body C2 and the cover C3 is It is carried to the sliding surface through the groove 43. As a result, the rotary switch 1 can stably supply the lubricant to the sliding surface, and the movable body 7 can perform a smooth rotation operation. The bottom surface of the groove 43 may have a pin mark 43A. Further, the second surface C <b> 31 may further include a recess 51 at a position different from the groove 43. The shape of the recess 51 is, for example, a circle or a polygon. The bottom surface of the recess 51 has a pin mark 51A. The recess 51 may be provided between the outermost peripheral portion of the second surface C31 and the straight groove 43.

  FIG. 6 is a perspective view showing another example of the bottom surface C31 of the cover C3. The recess provided in the second surface C31 of the cover C3 is a groove 44. The groove 44 has a bottom surface lower than the sliding surface. Two grooves 44 are provided on the bottom surface C31 of the cover C3. The two grooves 44 are concentric circular arcs. Thus, the pattern of the groove 44 is an arc centered on a point different from the shaft portion 8 of the movable body 7. The width of the groove 44 is 3 mm, for example, and the depth is 0.4 mm. The width, depth, number, etc. of the grooves 44 are not limited to this value. A pin mark 44 </ b> A may be provided on the bottom surface of the groove 44.

  Further, the two grooves 44 may be arcs centered on different points.

The patterns of the grooves 43 and 44 provided on the second surface C31 shown in FIGS. 5 and 6 indicate that the second surface C31 of the cover C3 (second housing) is on the body C2 (first housing) side. When viewed from
The shape is different from the arc locus drawn by the rotation of the movable body 7.

  Thus, by using a groove pattern different from the rotation trajectory of the movable body 7, it is possible to suppress uneven wear caused by sliding between the second surface C 31, which is a sliding surface, and the movable body 7. Can do. Thereby, while being able to ensure the smoothness of sliding between the 2nd surface C31 and the 4th surface 7B, the reliability with respect to long-term use of the rotary switch 1 can be improved.

  This will be specifically described below.

  The rotary switch 1 having the cover C3 shown in FIG. 4 has an arc-shaped groove 42 whose center is the shaft portion 8 of the movable body 7 on the second surface C31. The arc-shaped groove 42 coincides with the locus (broken line W) on the sliding surface of the portion P of the movable body 7 drawn by the rotation of the movable body 7.

  In the rotary switch 1, when the movable body 7 repeatedly rotates and reciprocates, the contact surface between the second surface C 31 and the movable body 7 is caused by friction generated between the second surface C 31 and the movable body 7. It is shaved by wear. As a result, a convex portion matching the shape of the groove 42 is formed on the surface 7B facing the second surface C31 of the movable body 7. And since the convex part formed in the surface 7B fits into the groove | channel 42, the groove | channel 42 becomes a cause which suppresses the sliding of the movable body 7. FIG.

  Moreover, when only a specific part of the movable body 7 is worn, the strength of the movable body 7 is reduced, and stress is concentrated on a specific portion of the movable body 7. Thereby, the rotary switch 1 may affect not only the obstruction of sliding between the second surface C31 and the movable body 7, but also the reliability due to long-term use.

  On the other hand, in the rotary switch 1 having the cover C3 shown in FIG. 5 or FIG. 6, wear of the movable body 7 is concentrated on a part because the locus drawn by a part P of the movable body 7 and the patterns of the grooves 43 and 44 are different. It becomes difficult to do. In other words, compared to the rotary switch 1 having the cover C3 shown in FIG. Further, since the wear surface becomes uniform, the progress speed of wear can be delayed. Therefore, the rotary switch 1 having a groove on the second surface C31 that does not coincide with the trajectory due to the rotation of the movable body 7 can improve reliability in long-term use.

  The structure of the recess 41 and the grooves 43 and 44 provided on the sliding surface (second surface C31) of the second housing is also useful in a rotary switch that does not use a lubricant on the sliding surface. By providing the recess 41 and the grooves 43 and 44 on the sliding surface, in the rotary switch 1, it is possible to suppress uneven wear of the movable body 7 and the cover C3 on the sliding surface. Thereby, the rotary switch 1 can improve the reliability in long-term use. Furthermore, when the cover C3 is formed by resin molding, it is possible to reduce the influence of burrs generated during molding on the rotation of the movable body 7. Thereby, the movable body 7 can perform a smooth rotation operation.

  The shape of the recess 41 and the grooves 42, 43, and 44 may be V-shaped without a bottom surface parallel to the sliding surface.

(Summary)
As described above, the rotary switch 1 according to the first aspect of the present disclosure includes the first casing C2 and the second casing C3 joined so as to provide the first casing C2 and the space 100. A movable body 7 provided in the space 100 and capable of rotating around the shaft portion 8; and a fixed contact 4 provided on the first surface C21 of the first housing C2 facing the space 100. The movable contact 3 is provided on the movable body 7 and contacts or separates from the fixed contact 4, and the lubricant is provided in the space 100. The second housing C3 has a second surface C31 that is opposed to the first surface C21 through the space 100 and is a sliding surface on which the movable body 7 slides. The second surface C31 has a recess 41 on the sliding surface.

  According to this configuration, the rotary switch 1 can smoothly rotate the movable body 7.

  In the rotary switch 1 of the second aspect, the recess is the groove 42 in the first aspect. According to this configuration, the lubricant can be circulated on the sliding surface.

  In the rotary switch 1 according to the third aspect, in the second aspect, the groove 43 constituting the recess is different from the trajectory of the rotation of the movable body 7. According to this configuration, the uneven wear of the sliding surface can be suppressed.

  In the rotary switch 1 of a 4th aspect, the groove | channel 43 which comprises a recessed part is a straight line in a 3rd aspect. According to this configuration, the uneven wear of the sliding surface can be suppressed.

  In the rotary switch 1 according to the fifth aspect, in any of the first to fourth aspects, the pin mark 41A is provided on the bottom surface of the recess. According to this structure, the influence which the burr | flash which arises in the ejector pin installation part in resin molding has on the sliding of the movable body 7 can be reduced.

  In the rotary switch 1 of the sixth aspect, the first casing C2, the second casing C3 joined so as to provide the first casing C2 and the space 100, the shaft 100 provided in the space 100, A movable body 7 that can be rotated around the part, a fixed contact 4 provided on the first surface C21 of the first housing C2 facing the space 100, and a fixed contact 4 provided on the movable body 7. And a movable contact 3 that contacts or separates. The second housing C3 has a second surface C31 that is opposed to the first surface C21 through the space 100 and is a sliding surface on which the movable body 7 slides. The second surface C31 has grooves 43 and 44 on the sliding surface. The grooves 43 and 44 are different from the locus of rotation of the movable body 7. According to this configuration, in the rotary switch 1, it is possible to suppress uneven wear of the movable body 7 and the cover C3 on the sliding surface. Thereby, the rotary switch 1 can improve the reliability in long-term use. Furthermore, when the cover C3 is formed by resin molding, it is possible to reduce the influence of burrs generated during molding on the rotation of the movable body 7. Thereby, the movable body 7 can perform a smooth rotation operation.

  The rotary switch according to the present disclosure is particularly useful as a switch that detects a shift position of a vehicle, for example.

1 Rotary switch A1 Contact device C1 Housing C2 Body (first housing)
C3 cover (second housing)
3 movable contact 4 fixed contact (first fixed contact, second fixed contact)
5 Conductor plate 7 Movable body 41, 51 Recess 42, 43, 44 Groove 41A, 42A, 43A, 44A, 51A Pin mark 100 Space 101 Lubricant

Claims (6)

A first housing;
A second housing joined to provide a space with the first housing;
A movable body provided in the space and capable of rotating around a shaft portion;
A fixed contact provided on the first surface of the first housing facing the space;
A movable contact provided on the movable body and contacting or separating from the fixed contact;
A lubricant provided in the space;
With
The second housing is opposed to the first surface through the space, and has a second surface that is a sliding surface on which the movable body slides.
The second surface has a recess in the sliding surface,
Rotary switch. The recess is a groove;
The rotary switch according to claim 1. The groove is different from the trajectory of rotation of the movable body,
The rotary switch according to claim 2. The groove is a straight groove,
The rotary switch according to claim 3. A pin mark is provided on the bottom surface of the recess,
The rotary switch as described in any one of Claims 1-4. A first housing;
A second housing joined to provide a space with the first housing;
A movable body provided in the space and capable of rotating around a shaft portion;
A fixed contact provided on the first surface of the first housing facing the space;
A movable contact provided on the movable body and contacting or separating from the fixed contact;
With
The second housing is opposed to the first surface through the space, and has a second surface that is a sliding surface on which the movable body slides.
The second surface has a groove in the sliding surface,
The groove is different from the trajectory of rotation of the movable body,
Rotary switch.