Power transmission and distribution device

Abstract

To provide a power transmission and distribution device having a configuration suitable for automation of manufacturing.SOLUTION: A power transmission and distribution device includes a housing member having an opening on one side, and a bearing part (40) attached to a side wall of the housing member and having a bearing hole (411) into which an end portion of a rotary shaft of a drive part for driving a movable contact is inserted, wherein the power transmission and distribution device further includes a first guide part provided near the bearing hole (411) and close to a bottom of the housing member and configured to guide insertion of the rotary shaft into the bearing hole (411).SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a power transmission and distribution device. [Background technology]

[0002] For example, Patent Document 1 discloses that when a rotating member having a rotating shaft is mounted inside a case, a U-shaped bearing portion provided inside the case that receives the rotating shaft and a pressing portion provided in a cover that covers the case at a position corresponding to the bearing portion and that prevents the rotating shaft from coming loose are used, and by covering the case with the cover, the rotating shaft of the rotating member is clamped between the bearing portion and the pressing portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-298719 Summary of the Invention [Problem to be solved by the invention]

[0004] Power transmission and distribution devices such as switches have movable contacts (movable electrodes) that are driven to electrically connect or disconnect a power supply line and a load line. The movable contacts are driven by rotating a drive unit attached to a rotating shaft. That is, an operator operates a handle connected to the rotating shaft to rotate the rotating shaft, and the drive unit drives the movable contact in conjunction with the rotation of the rotating shaft.

[0005] Therefore, in the manufacturing process of the power transmission and distribution device, it is necessary to support the end of the rotating shaft on a bearing fixed inside the housing. This operation is generally performed on a unit in which the drive unit is attached to the rotating shaft and a connecting mechanism is connected between the rotating shaft and the handle.

[0006] On the other hand, such units are heavy because a drive unit and a connecting mechanism are attached to the rotating shaft, making such work not easy. In addition, since the position of the rotating shaft and the bearing unit must be adjusted within the housing, automation using an image sensor such as a camera is also difficult.

[0007] Furthermore, when the end of the rotating shaft is supported using a bearing portion and a pressing portion, as in Patent Document 1, the number of parts increases, which causes problems such as increased manufacturing costs for the power transmission and distribution device and an increase in size of the power transmission and distribution device.

[0008] The present invention has been made in view of the above circumstances, and has an object to provide a power transmission and distribution device that can be manufactured by a simple process and has a configuration suitable for automation. [Means for solving the problem]

[0009] The power transmission and distribution device of the present invention is a power transmission and distribution device comprising a housing member having an opening on one side, and a bearing portion attached to a side wall of the housing member and having a through hole into which the end of the rotating shaft of a drive unit that drives a movable contact is inserted, and is provided with a first guide portion that guides the insertion of the rotating shaft into the through hole when the drive unit is attached from the open opening side of the housing. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a power transmission and distribution device having a configuration suitable for automated manufacturing. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a front view of a switch according to a first embodiment. [Figure 2] FIG. 2 is a bottom view of the switch according to the first embodiment. [Figure 3] FIG. 3 is a vertical cross-sectional view taken along line III-III in FIG. 2. [Figure 4] 4 is a partially enlarged view showing a state in which a bearing portion of the switch according to the first embodiment is attached to a rear side wall of an upper housing. FIG. [Figure 5]3 is a partial vertical cross-sectional view showing a state in which a bearing portion of the switch according to the first embodiment supports one end of a rotating shaft. FIG. [Figure 6] 3 is a perspective view showing a ring member of a bearing portion of the switch according to the first embodiment. FIG. [Figure 7] 10 is a front view of a bearing portion schematically illustrating a bearing portion of a switch according to a second embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, a power transmission and distribution device according to the present invention will be described with reference to the drawings showing an embodiment thereof. The power transmission and distribution device includes, for example, a switch, a circuit breaker, etc. In the following, a switch will be described as an example of the power transmission and distribution device.

[0013] (Embodiment 1) 1 is a front view of a switch 10 according to the first embodiment. The switch 10 includes a housing 11. The housing 11 includes an upper housing 11a (housing member) having a housing shape with an opening 113 that is open on one side below, and a lower housing 11b also having a housing shape that is open on the top, with the upper housing 11a covering the open part of the lower housing 11b. The upper housing 11a and the lower housing 11b are fastened together, for example, by screws at their edges.

[0014] A hanging fitting 60 is provided on the top surface of the upper housing 11a. The switch 10 is hung from an overhead line (not shown) by the hanging fitting 60, and is attached to a utility pole by a fastening fitting (not shown) or the like.

[0015] Three-phase bushings 13u, 13v, 13w and bushings 14u, 14v, 14w are provided on both side walls of upper housing 11a that face each other in the left-right direction. More specifically, bushings 13u, 13v, 13w are inserted into the left side wall, and bushings 14u, 14v, 14w are inserted into the right side wall. For example, power supply-side lines (distribution lines) are connected to bushings 13u, 13v, 13w via terminals, and load-side lines (distribution lines) are connected to bushings 14u, 14v, 14w via terminals.

[0016] A handle 6 for operating the switching mechanism 1 housed within the upper housing 11a is rotatably provided on the front side wall of the upper housing 11a. By appropriately rotating the handle 6, the state of the switch 10 can be switched on and off.

[0017] The switching mechanism 1 moves a movable contact 17 (movable electrode) as described below in response to the rotation of the handle 6. In addition, a pointer 50 that indicates the state of the switch 10 is attached to a rear side wall 112 (see FIG. 2) of the upper housing 11a opposite to the front side wall.

[0018] Fig. 2 is a bottom view of the switch 10 according to the embodiment 1. Fig. 2 is a bottom view in a state where the lower housing 11b of the switch 10 is removed. For convenience, in Fig. 2, the switching mechanism 1 and the handle 6 are shown simply by dashed lines.

[0019] As described above, the switching mechanism 1 is housed within the upper housing 11a, and the fixed contact 15, the flexible conductor 16, and the movable contact 17 are also housed within the upper housing 11a.

[0020] Three through holes 110, through which the bushings 13u, 13v, and 13w pass, are arranged side by side in the front-rear direction on the left side wall of the upper housing 11a. The bushings 13u, 13v, and 13w are inserted into the upper housing 11a through the through holes 110 in the upper housing 11a.

[0021] Conductors 131u, 131v, and 131w are embedded inside the bushings 13u, 13v, and 13w, respectively (see FIG. 2). Therefore, the conductors 131u, 131v, and 131w, together with the bushings 13u, 13v, and 13w, are also inserted into the upper housing 11a through the through-holes 110 of the upper housing 11a.

[0022] The right side wall of the upper housing 11a has the same configuration as the left side wall, and the right side wall will be described below with reference to FIG. Three through holes 120, through which the bushings 14u, 14v, and 14w pass, are arranged side by side in the front-rear direction on the right side wall of the upper housing 11a. The bushings 14u, 14v, and 14w are inserted into the upper housing 11a through the through holes 120 in the upper housing 11a.

[0023] Conductors 141u, 141v, and 141w are embedded inside the bushings 14u, 14v, and 14w, respectively. Therefore, the conductors 141u, 141v, and 141w, together with the bushings 14u, 14v, and 14w, are also inserted into the upper housing 11a through the through-holes 120 in the upper housing 11a.

[0024] As described above, the bushings 13u, 13v, and 13w penetrate the left sidewall of the upper housing 11a. Fixed contacts 15 are provided at the tips of the bushings 13u, 13v, and 13w inside the upper housing 11a. The terminals of the bushings 13u, 13v, and 13w on the outside of the housing 11a are electrically connected to the corresponding fixed contacts 15 via the conductors 131u, 131v, and 131w of the bushings 13u, 13v, and 13w.

[0025] As described above, the bushings 14u, 14v, and 14w penetrate the right side wall of the upper housing 11a. Flexible conductors 16 are provided at the tip of each of the bushings 14u, 14v, and 14w inside the upper housing 11a. The flexible conductors 16 are made of braided thin wires and are deformable. The terminals of the bushings 14u, 14v, and 14w on the outside of the housing 11 are electrically connected to the corresponding flexible conductors 16 via the conductors 141u, 141v, and 141w of the bushings 14u, 14v, and 14w.

[0026] A movable contact 17 is provided at the tip of the flexible conductor 16. The movable contact 17 can be moved by the switching mechanism 1 in a direction toward or away from the fixed contact 15 in response to operation of the handle 6. That is, operation of the handle 6 electrically connects or separates the fixed contact 15 and the movable contact 17.

[0027] Between the left and right side walls of the upper housing 11a in the left-right direction, there is interposed a driving unit 20 that drives the movable contact 17 in the direction of approaching and separating from the fixed contact 15 by the switching mechanism 1. A driving unit 20 is provided corresponding to each flexible conductor 16.

[0028] A protrusion 21 is provided on the outer peripheral surface of each drive unit 20 at the middle in the axial direction, protruding radially. The protrusion 21 is disposed directly above the flexible conductor 16 so that the axial direction intersects with the extension direction of the flexible conductor 16.

[0029] The three drive units 20 are fitted onto the same rotating shaft 30 at predetermined intervals in the axial direction. In this case, the protrusions 21 of each drive unit 20 are arranged so as to face in the same radial direction from the rotating shaft 30. In other words, when the rotating shaft 30 rotates, the three drive units 20 rotate simultaneously.

[0030] A bearing 40 that rotatably supports one end of the rotating shaft 30 is attached to the rear side wall 112 of the upper housing 11a. That is, the other end of the rotating shaft 30 is connected to the switching mechanism 1, and one end of the rotating shaft 30 is journaled by the bearing 40. For example, the bearing 40 is welded to the inner surface of the rear side wall 112. The switching mechanism 1 is activated by operating the handle 6, and the switching mechanism 1 rotates the rotating shaft 30.

[0031] More specifically, when the three drive units 20 rotate simultaneously due to the rotation of the rotary shaft 30 by the switching mechanism 1 and are positioned within a predetermined rotation angle range, the protrusions 21 of each drive unit 20 move each movable contact 17 in a direction away from the fixed contact 15, electrically isolating the fixed contact 15 from the movable contact 17. Furthermore, when the three drive units 20 rotate simultaneously due to the rotation of the rotary shaft 30 by the switching mechanism 1 and are positioned outside the predetermined rotation angle range, the protrusions 21 of each drive unit 20 move each movable contact 17 in a direction approaching the fixed contact 15, electrically connecting the fixed contact 15 and the movable contact 17.

[0032] Figure 4 is a partially enlarged view showing the state in which the bearing portion 40 of the switch 10 according to embodiment 1 is attached to the rear side wall 112 of the upper housing 11a, and Figure 5 is a partially vertical cross-sectional view showing the state in which the bearing portion 40 of the switch 10 according to embodiment 1 supports one end of the rotating shaft 30.

[0033] The bearing portion 40 has a seat portion 41 having a bearing hole (through hole) 411 , and an annular member 42 that fits into the bearing hole 411 of the seat portion 41 . The seat 41 is made of metal and has opposing ends of a rectangular metal plate bent to form a generally C-shaped cross section. That is, the seat 41 has a rectangular plate portion 412 disposed facing the rear side wall 112 of the upper housing 11a at a predetermined distance, and curved portions 413 extending from both edges of the rectangular plate portion 412 in the up-down direction toward the rear side wall 112. A bearing hole 411 is formed in the center of the rectangular plate portion 412.

[0034] Fig. 6 is a perspective view showing the ring member 42 of the bearing unit 40 of the switch 10 according to the first embodiment. As shown in Fig. 6, the ring member 42 has a positioning portion 421 (first guide portion) that determines the position of the rotating shaft 30 unit when the rotating shaft 30 unit is assembled as described below, a guide portion 422 that guides the rotating shaft 30 unit to the positioning portion 421, and a circular ring portion 425 (circular ring member) that is integrally formed with the positioning portion 421 and the guide portion 422 and is fitted into the bearing hole 411 of the seat portion 41. The ring member 42 is made of, for example, iron or brass.

[0035] The positioning portion 421 is located near the bearing hole 411, at a position on the rear side wall 112 near the bottom 114 of the upper housing 11a, and has an approximately semicircular shape with the same curvature as the bearing hole 411 (or the annular portion 425), and the lower side, i.e., the opening 113 side, is open.

[0036] When the rotating shaft 30 (hereinafter referred to as the rotating shaft 30 unit), on which the three drive units 20 are fitted and whose other end is connected to the switching mechanism 1, is assembled into the upper housing 11a, the positioning unit 421 guides the insertion of one end of the rotating shaft 30 into the bearing hole 411. For example, the inner surface S1 of the positioning unit 421 is a curved surface corresponding to the curved surface on the periphery of one end of the rotating shaft 30 (hereinafter referred to as the outer circumferential curved surface), and supports the rotating shaft 30 by contacting the outer circumferential curved surface of one end of the rotating shaft 30.

[0037] The guide portion 422 is provided near the bearing hole 411 and at a position closer to the opening 113 than the positioning portion 421 on the rear side wall 112. That is, the guide portion 422 is provided below the positioning portion 421. There are two guide portions 422, and the two guide portions 422 are respectively connected to both ends below the positioning portion 421 and spaced apart in an intersecting direction (left-right direction) that intersects with the opposing direction (up-down direction) of the opening 113 and the bottom 114 of the upper housing 11a. That is, the two guide portions 422 and the positioning portion 421 are integrally formed and form a generally U-shape that is open on the opening 113 side as a whole.

[0038] Each guide portion 422 has an inclined surface 423 (second guide portion) at its lower end, closer to the bearing hole 411 of the seat portion 41. That is, the inclined surfaces 423 of the two guide portions 422 are spaced apart in the intersecting direction and face each other obliquely in the intersecting direction. The two inclined surfaces 423 are formed so that the distance between them becomes narrower as they approach the positioning portion 421.

[0039] Furthermore, in each guide portion 422, a flat surface 424 (third guide portion) is formed in correspondence with the inclined surface 423, near the bearing hole 411 and closer to the positioning portion 421 than the inclined surface 423. The flat surface 424 is a rectangular surface extending in the vertical direction, and is connected to the upper end of the inclined surface 423. In each guide portion 422, the flat surface 424 extends from the inclined surface 423 toward the positioning portion 421 in the tangential direction of the bearing hole 411 of the seat portion 41.

[0040] The flat surfaces 424 of the two guide portions 422 face each other in the intersecting direction (left-right direction). The distance between the two flat surfaces 424 in the intersecting direction is constant and is equal to or less than the shortest distance between the two inclined surfaces 423, i.e., the distance between the upper ends of the inclined surfaces 423. The distance between the two flat surfaces 424 in the intersecting direction is, for example, slightly larger than the diameter of one end of the rotating shaft 30.

[0041] The inclined surface 423 and flat surface 424 of each guide portion 422 guide the movement of one end of the rotating shaft 30 to the positioning portion 421 when the rotating shaft 30 unit is assembled into the upper housing 11a, as will be described later.

[0042] The annular body portion 425 is ring-shaped, and its inner peripheral surface is flush with the inner surface S1 of the positioning portion 421. That is, the inner peripheral surface of the annular body portion 425 has the same curvature as the inner surface S1 of the positioning portion 421. The inner diameter of the annular body portion 425 is slightly larger than the diameter corresponding to the outer peripheral curved surface of one end of the rotating shaft 30, and the annular body portion 425 is fitted onto the one end of the rotating shaft 30. The outer diameter of the annular body portion 425 is slightly smaller than the diameter of the bearing hole 411 of the seat portion 41, and the annular body portion 425 is fitted into the bearing hole 411.

[0043] That is, one end of the rotating shaft 30 is inserted into the bearing hole 411 of the seat portion 41 via the annular body portion 425. In other words, the annular body portion 425 is interposed between one end of the rotating shaft 30 and the bearing hole 411 of the seat portion 41.

[0044] 6, the process of inserting one end of the rotating shaft 30 into the bearing portion 40 during the work of incorporating the rotating shaft 30 unit into the upper housing 11a will be described. In FIG. 6, the arrow indicates the movement trajectory of one end of the rotating shaft 30.

[0045] The work of assembling the rotating shaft 30 unit into the upper housing 11a is performed after preparing the upper housing 11a so that it is upside down, i.e., so that the bottom 114 is on the bottom and the opening 113 is on the top. In this state, the rotating shaft 30 unit is inserted into the inside of the upper housing 11a through the opening 113. That is, the rotating shaft 30 unit is lowered from the opening 113 toward the bottom 114. As it descends, one end of the rotating shaft 30 approaches the bearing part 40 along the rear side wall 112 of the upper housing 11a.

[0046] When one end of the rotating shaft 30 approaches the bearing part 40, it first abuts against the inclined surface 423 of one of the guide parts 422 and is guided between the two guide parts 422 (inclined surfaces 423). That is, the one end of the rotating shaft 30 abuts against one of the inclined surfaces 423 and slides down on the inclined surface 423.

[0047] Next, one end of the rotating shaft 30 enters between the two flat surfaces 424 and is guided by the two flat surfaces 424 to move (descend) in the extension direction of the flat surfaces 424, that is, in the vertical direction, toward the positioning portion 421 side.

[0048] When one end of the rotating shaft 30 reaches the positioning portion 421, the outer curved surface thereof abuts against the inner surface S1 of the positioning portion 421, preventing it from descending any further. In this way, when the descent of one end of the rotating shaft 30 (rotating shaft 30 unit) is stopped and the position of one end of the rotating shaft 30 in the up-down direction is determined, one end of the rotating shaft 30 (rotating shaft 30 unit) is pressed in the direction in which it penetrates the bearing hole 411 (annular body portion 425) of the bearing portion 40 (see the arrow in FIG. 6).

[0049] As described above, the inner surface S1 of the positioning portion 421 is a curved surface that corresponds to the outer circumferential curved surface of one end of the rotating shaft 30, and the inner circumferential surface of the annular body portion 425 is flush with the inner surface S1 of the positioning portion 421. Therefore, when one end of the rotating shaft 30 is pressed in the direction of penetration of the annular body portion 425, the one end of the rotating shaft 30 is smoothly inserted into the annular body portion 425 and fitted within the annular body portion 425. This completes the insertion of one end of the rotating shaft 30 into the bearing portion 40.

[0050] As described above, in the switch 10 according to the first embodiment, by using the bearing portion 40 having the above-described configuration, one end of the rotating shaft 30 can be inserted into the bearing portion 40 with a simple operation and with high accuracy. Therefore, the efficiency of the work of incorporating the rotating shaft 30 unit into the upper housing 11a can be improved. In addition, the work of incorporating the rotating shaft 30 unit into the upper housing 11a can be easily automated.

[0051] In the switch 10 according to the first embodiment, as described above, the positioning portion 421 and the guide portion 422 are integrally formed with the annular body portion 425, and the annular body portion 425 is fitted into the bearing hole 411 of the seat portion 41. Therefore, by rotating the annular body member 42, the opening direction of the U-shaped portion formed by the two guide portions 422 and the positioning portion 421 can be changed as needed. In this case, the rotating shaft 30 unit can be moved downward obliquely toward the bearing portion 40, and the degree of freedom in assembling the rotating shaft 30 unit into the upper housing 11a is increased.

[0052] In the above, an example has been described in which the positioning portion 421 and the guide portion 422 are formed integrally with the annular body portion 425, and the positioning portion 421 and the guide portion 422 are attached to the seat portion 41 via the annular body portion 425, but the present invention is not limited to this. For example, the annular body portion 425 may be omitted, and the positioning portion 421 and the guide portion 422 may be provided directly on the seat portion 41, or may be formed integrally with the seat portion 41.

[0053] In the above description, the positioning portion 421 and the guide portion 422 are integrally formed with the annular body portion 425, but the present invention is not limited to this. For example, the positioning portion 421 and the guide portion 422 may be separated, the positioning portion 421 may be provided on the seat portion 41, and only the guide portion 422 may be integrally formed with the annular body portion 425. Even in this case, as described above, the degree of freedom in the installation work of the rotating shaft 30 unit into the upper housing 11a can be increased.

[0054] (Embodiment 2) In the first embodiment, the switch 10 has been described with reference to an example in which the two guide portions 422 and the positioning portion 421 are integrally formed, but the present invention is not limited to this. FIG. 7 is a front view of the bearing portion 40, which schematically shows the bearing portion 40 of the switch 10 according to the second embodiment.

[0055] In the switch 10 according to the second embodiment, the bearing portion 40 has a seat portion 41 having a bearing hole 411, a positioning portion 421A (first guide portion) that determines the position of the rotating shaft 30 unit when the rotating shaft 30 unit is assembled, and a guide portion 422A that guides the rotating shaft 30 unit to the positioning portion 421A. The seat portion 41 has the same configuration as the seat portion 41 of the first embodiment, and detailed description thereof will be omitted.

[0056] The positioning portion 421A and the guide portion 422A are made of, for example, iron or brass, and are attached by welding or the like to the rectangular plate portion 412 of the seat portion 41. Note that the positioning portion 421A and the guide portion 422A may be formed integrally with the seat portion 41.

[0057] The positioning portion 421A is located near the bearing hole 411 and is provided on the rear sidewall 112 near the bottom 114 of the upper housing 11a. The positioning portion 421A guides the insertion of one end of the rotating shaft 30 into the bearing hole 411 when the rotating shaft 30 unit is installed in the upper housing 11a. The positioning portion 421A is curved in a minor arc shape when viewed from the front, and its inner surface S2 forms a curved surface that corresponds to the outer circumferential curved surface of one end of the rotating shaft 30. The positioning portion 421A is provided so that this inner surface S2 (curved surface) faces downward, i.e., toward the opening 113. The inner surface S2 of the positioning portion 421A is flush with the inner circumferential surface of the bearing hole 411. The outer circumferential curved surface of one end of the rotating shaft 30 abuts against the inner surface S2 of the positioning portion 421A, thereby supporting the rotating shaft 30.

[0058] Guide portion 422A is provided near bearing hole 411 and at a position closer to opening 113 than positioning portion 421A on rear surface sidewall 112. That is, guide portion 422A is provided below positioning portion 421A. There are two guide portions 422A, and each is provided below positioning portion 421A and spaced apart from positioning portion 421A. The two guide portions 422A are spaced apart in an intersecting direction (left-right direction) that intersects with the opposing direction (up-down direction) between opening 113 and bottom 114 of upper housing 11a.

[0059] Each guide portion 422A has an inclined surface 423 (second guide portion) at its lower end, closer to the bearing hole 411 of the seat portion 41. That is, the inclined surfaces 423 of the two guide portions 422A are spaced apart from each other in the intersecting direction and face each other obliquely in the intersecting direction. The two inclined surfaces 423 are formed such that the distance between them becomes narrower as they are closer to the positioning portion 421A.

[0060] Each guide portion 422A has a flat surface 424 (third guide portion) formed in correspondence with the inclined surface 423, near the bearing hole 411 and closer to the positioning portion 421A than the inclined surface 423. The flat surface 424 is a rectangular surface extending in the vertical direction and is connected to the upper end of the inclined surface 423. That is, the flat surfaces 424 of the two guide portions 422A are spaced apart from each other in the intersecting direction (left-right direction) and face each other obliquely in this intersecting direction. Each flat surface 424 extends from the inclined surface 423 toward the positioning portion 421A in the tangential direction of the bearing hole 411 of the seat portion 41.

[0061] The two flat surfaces 424 are formed so that the distance between the two flat surfaces 424 in the intersecting direction becomes narrower as they approach the positioning portion 421A. The shortest distance between the two flat surfaces 424 in the intersecting direction is, for example, slightly larger than the diameter of one end of the rotating shaft 30.

[0062] As in the first embodiment, the inclined surface 423 and the flat surface 424 of each guide portion 422A guide the movement of one end of the rotating shaft 30 to the positioning portion 421A when the rotating shaft 30 unit is assembled into the upper housing 11a.

[0063] In the above, an example has been described in which the positioning portion 421A and the guide portion 422A are directly attached to the rectangular plate portion 412 of the seat portion 41, but the present invention is not limited to this. For example, similar to the first embodiment, the positioning portion 421A and the guide portion 422A may be provided on the annular portion 425, and the annular portion 425 may be fitted into the bearing hole 411 of the seat portion 41.

[0064] Furthermore, in the above description, an example has been given in which the inclined surface 423 and the flat surface 424 are integrally formed, but this is not limited to this, and the inclined surface 423 and the flat surface 424 may be provided separately.

[0065] The same parts as those in the first embodiment are denoted by the same reference numerals and detailed description thereof will be omitted.

[0066] In embodiments 1 and 2, an example has been described in which each guide portion 422, 422A in the bearing portion 40 of the switch 10 has both an inclined surface 423 and a flat surface 424, but this is not limited to this, and the inclined surface 423 may be omitted and the guide portion 422 may be configured to have only the flat surface 424.

[0067] Furthermore, in embodiments 1 and 2, the bearing portion 40 of the switch 10 has both the guide portions 422, 422A and the positioning portions 421, 421A as an example, but this is not limited to this, and the switch 10 may be configured to have only the positioning portions 421, 421A without the guide portions 422, 422A.

[0068] The technical features (constituent elements) described in the first and second embodiments can be combined with each other, and by combining them, new technical features can be achieved. The embodiments disclosed herein are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the claims, not by the above meaning, and is intended to include all modifications within the meaning and scope of the claims.

[0069] The matters described in each embodiment can be combined with each other. Furthermore, the independent claims and dependent claims described in the claims can be combined with each other in any and all combinations, regardless of the reference format. Furthermore, the claims use a format in which a claim references two or more other claims (multiple claim format), but this is not limited to this. A multiple claim (multi-multi claim) that references at least one other multiple claim may also be used. [Explanation of symbols]

[0070] 10: switch, 11: housing, 11a: upper housing (housing member), 11b: lower housing, 17: movable contact, 20: drive unit, 30: rotating shaft, 40: bearing unit, 411: bearing hole (through hole), 112: rear side wall, 113: opening, 114: bottom, 421, 421A: positioning unit (first guide unit), 423: inclined surface (second guide unit), 424: flat surface (third guide unit), 425: annular body unit (annular member), S1, S2: inner surface (curved surface)

Claims

1. A power transmission and distribution device comprising: a housing member having an opening on one side; and a bearing unit attached to a side wall of the housing member and having a through hole into which an end of a rotation shaft of a drive unit that drives a movable contact is inserted, A power transmission and distribution device comprising a first guide portion provided near the through hole and toward the bottom of the housing member, the first guide portion guiding the insertion of the rotating shaft into the through hole.

2. two second guide portions provided near the through hole and closer to the opening than the first guide portions and guiding the rotation shaft to the first guide portions; the two second guide portions are spaced apart in a direction intersecting the opposing direction of the bottom and the opening, The power transmission and distribution device according to claim 1 , wherein the distance between the two second guide portions becomes narrower as the second guide portions are closer to the first guide portion.

3. two third guide portions provided near the through hole and closer to the first guide portion than the second guide portions, and guiding the rotation shaft to the first guide portions; the two third guide portions face each other in the intersecting direction, The power transmission and distribution device according to claim 2 , wherein each of the third guide portions extends tangentially to the through hole toward the first guide portion.

4. a circular member fitted into the through hole, The power transmission and distribution device according to claim 3 , wherein the second guide portion and the third guide portion are integrally formed with the annular member.

5. The power transmission and distribution device according to claim 3 , wherein the first guide portion, the second guide portion, and the third guide portion are integrally formed and have a U-shape that opens toward the opening.

6. The power transmission and distribution device according to claim 1 , wherein the first guide portion has a curved surface that corresponds to a circumferential surface of the rotation shaft.

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