JP2014059996A - Switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch capable of reducing the maintenance cost in the case a switch main body is repeatedly attached to/detached from a plate.SOLUTION: The switch includes: a switch main body 1 that is disposed being embedded in a reception hole formed in a wall material; and a plate 21 having an insertion hole 210 through which the switch main body 1 is inserted, and which is detachably coupled with the switch main body 1 and is fixed to the wall material. The switch main body 1 and the plate 21 are coupled by inserting and hooking a pair of engagement protrusions 211, which are formed on the plate 21 at the positions opposing to each other being interposed by the switch main body 1, with a pair of engagement holes 11 formed in the switch main body 1. The engagement protrusions 211, which are relatively easily broken when the switch main body 1 is repeatedly attached to and detached from the plate 21, are formed on the plate 21 which is generally inexpensive than the switch main body 1. Compared to the case when the engagement protrusions are formed on the switch main body 1, the maintenance cost can be reduced.

Description

  The present invention relates to a switch.

  Conventionally, a switch body embedded in an embedding hole provided in a wall material and an insertion hole through which the switch body is inserted are detachably coupled to the switch body and fixed to the wall material. There is provided a switch including a plate to be operated (see, for example, Patent Document 1).

  Conventionally, as shown in FIGS. 7 and 8, the engaging protrusion 19 provided in the switch body 1 is engaged with the engaging hole 219 provided in the inner peripheral surface of the insertion hole 210 in the plate 21. Thus, the switch body 1 is detachably coupled to the plate 21.

JP 2001-325846 A (refer to paragraph numbers 0035 and 0036 and FIG. 9)

  However, when the switch body 1 is repeatedly attached to and detached from the plate 21, the engagement protrusion 19 is easily damaged in the switch body 1. And when the engagement convex part 19 was damaged, it was necessary to replace | exchange switch main body 1, and the expense (maintenance expense) for replacement | exchange was comparatively high.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide a switch that can reduce maintenance costs when the switch body is repeatedly attached to and detached from the plate.

  The switch of the present invention has a switch body embedded in an embedding hole provided in a wall material, and an insertion hole through which the switch body is inserted, and is detachably coupled to the switch body and the wall. A plate fixed to the material, and the switch body and the plate are coupled to each other with an engaging projection provided on a portion of the plate facing each other across the switch body. It is achieved by engaging in the engagement hole formed.

  According to the present invention, the engagement convex portion, which is relatively easily damaged when the switch body is repeatedly attached to and detached from the plate, is provided on the plate whose unit price is generally lower than that of the switch body. Maintenance costs can be reduced compared to the case where the convex portion is provided on the switch body side.

It is a perspective view which shows the plate and switch main body of embodiment of this invention. It is a disassembled perspective view which shows the same as the above. It is the perspective view seen from the front side which shows the same. It is the perspective view seen from the rear side which shows the same. It is sectional drawing which shows the principal part in the state by which the terminal screw was loosened in the same as the above. It is sectional drawing which shows the same as the above. It is a perspective view which shows the plate and switch main body of a prior art example. It is sectional drawing which shows the same as the above.

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

  A switch provided with the terminal device of this embodiment is shown in FIGS. Hereinafter, the ABCDEF direction shown in FIG.

  This switch includes a switch body 1 and a plate 21 and two mounting brackets 22 used when the switch body 1 is embedded in an embedding hole (not shown) provided in a wall material.

  The switch body 1 includes a reversing handle 32 that swings in response to an operating force via an operating handle 31 and a contact 40 that has a movable contact 401 and swings in conjunction with the reversing handle 32. Further, the switch body 1 includes a first terminal plate 41 having a fulcrum convex portion 411 serving as a fulcrum of the contact 40, and a second terminal plate 42 provided with a fixed contact 421 to which the movable contact 401 of the contact 40 is separated. Is provided. The reversing handle 32 is made of, for example, a synthetic resin, and the contactor 40 and the terminal plates 41 and 42 are made of, for example, a metal plate.

  Further, the switch body 1 is coupled to the body 51 having a housing recess 50 in which the contact 40 and the terminal plates 41 and 42 are respectively housed, and the front side of the body 51 to serve as a fulcrum of the reversing handle 32. A housing 5 including a cover 52 is provided. Each of the body 51 and the cover 52 is made of, for example, a synthetic resin.

  On both the left and right sides of the body 51, a central convex portion 511 projects from the central portion in the vertical direction, and coupling convex portions 512 project from both the upper and lower sides of the central convex portion 511.

  The cover 52 includes a frame-shaped main body 520 that surrounds the reversing handle 32, and two coupling pieces 521 that are arranged vertically on the left and right ends of the main body 520 so as to protrude rearward. Each coupling piece 521 has a plate shape whose thickness direction is directed in the left-right direction, and coupling holes 522 into which one coupling convex portion 512 is engaged are provided in the left and right directions. That is, the coupling piece 521 sandwiches the central convex portion 511 on both the left and right sides of the body 51, and the coupling convex portion 512 is engaged with each coupling hole 522, whereby the body 51 and the cover 52 are coupled to each other. Further, at the time of engaging / disengaging the coupling convex portion 512 with respect to the coupling hole 522, the coupling piece 521 is elastically deformed so as to displace the front end portion (rear end portion) outward in the left-right direction with respect to the base portion (front end portion).

  The reversing handle 32 has a rectangular parallelepiped main body part 320 and a fulcrum convex part 321 projecting outward in the left-right direction from the left and right sides of the main body part 320. Further, fulcrum receiving portions 523 projecting forward from the left and right ends of the main body portion 520 of the cover 52 are provided in which the inward surfaces in the left-right direction are concave portions. The reversing handle 32 is swingable with respect to the cover 52 so that the upper and lower end portions are displaced back and forth with respect to the central portion by causing each fulcrum convex portion 321 to contact the front end portion of the fulcrum receiving portion 523 from the rear. It has become.

  Further, the rear surface of the operation handle 31 is provided with a fitting recess 310 (see FIG. 6) into which the front end portion of the reversing handle 32 is fitted. Engagement protrusions 322 protrude from the upper and lower surfaces of the reversing handle 32, and the engagement protrusions 322 are respectively provided on the upper and lower sides of the inner peripheral surface of the fitting recess 310. The operating handle 31 is integrated with the reversing handle 32.

  Further, the switch body 1 includes a reversing spring 33 which is made of a coil spring and has one end elastically contacting the rear end of the reversing handle 32 and the other end elastically contacting the front surface of the contact 40. In FIG. 5, only both end portions of the reversing spring 33 are shown. Due to the spring force of the reversing spring 33, each fulcrum convex part 321 of the reversing handle 32 is pressed against the fulcrum receiving part 523 of the cover 52 from the rear, and the contact 40 is pressed against the fulcrum convex part 411 of the first terminal plate 41 from the front. It is done.

  When the reversing handle 32 is tilted counterclockwise when viewed from the right so that the upper end protrudes forward of the housing 5 (hereinafter referred to as the “off state”), the reversing spring 33 has both ends at the center. Bend so that it is positioned above the part. In the above-described OFF state, the spring force of the reversing spring 33 acts on the reversing handle 32 so that the posture of the reversing handle 32 is maintained. In the contact 40, the movable contact 401 is provided downward, and in the second contact plate 42, the fixed contact 421 is provided upward. Therefore, in the on state, the spring force of the reversing spring 33 acts on the contact 40 so as to maintain the movable contact 401 away from the fixed contact 421. That is, in the off state, the first terminal plate 41 and the second terminal plate 42 are not electrically connected.

  Further, in the above-mentioned OFF state, the upper end portion of the reversing handle 32 receives a backward pressing force via the operation handle 31, and the reversing handle 32 resists the spring force of the reversing spring 33 and rotates clockwise as viewed from the right. When rotating, the direction of the spring force of the reversing spring 33 is reversed when the lower end of the reversing handle 32 is displaced to the front side of the central portion. Then, the reversing handle 32 is displaced at a stretch by the spring force of the reversing spring 33 to a state where the lower end portion protrudes forward of the housing 5 (hereinafter referred to as “on state”). In the ON state, as shown in FIG. 5, the reversing spring 33 bends so that the center portion is positioned below both ends, and the spring force of the reversing spring 33 causes the movable contact 401 to be fixed to the contact 40. It acts to press against 421. That is, in the ON state, the first terminal plate 41 and the second terminal plate 42 are electrically connected to each other via the contact 40. On the front surface of the operation handle 31 that is an operation surface that receives an operation force, a mark 311 made of a convex portion is attached to an upper end portion that is pushed backward in the ON state. In addition, the mark 311 is not restricted to a convex part, You may attach | subject by other methods, such as a recessed part, printing, and 2 color molding.

  Further, in the ON state, when the lower end portion of the reversing handle 32 receives a backward pressing force via the operation handle 31 and rotates counterclockwise as viewed from the right against the spring force of the reversing spring 33, the reversing handle When the upper end portion of 32 is displaced to the front side of the central portion, the direction of the spring force of the reversing spring 33 is reversed, and the reversing handle 32 is displaced to the off state at once.

  In the housing recess 50 of the body 5, a set of terminal nuts 43 and terminal screws 44 for connecting electric wires to the terminal plates 41 and 42 are stored for each terminal plate 41 and 42. Each terminal plate 41, 42 has a contact portion 412, 422 that is inserted between the head 441 of the terminal screw 44 and the terminal nut 43 and faces the terminal nut 43. Each of the contact portions 412 and 422 has a U shape having notches 413 and 423 that avoid the shaft portion 442 of the terminal screw 44. Further, one positioning groove 56 is provided for each of the terminal plates 41 and 42 on the inner surface facing the left and right in the housing recess 50 of the body 51. As for each terminal board 41 and 42, rattling with respect to the housing 5 is suppressed because each right-and-left both ends of the contact parts 412 and 422 are each accommodated in the said positioning groove | channel 56, respectively.

  Further, each terminal screw 44 is accommodated with the axial direction in the vertical direction and the head 441 in the vertical direction at the upper and lower ends in the accommodation recess 50.

  Further, two wire insertion holes 53, which are through holes penetrating in the front-rear direction, are provided on the bottom surface of the housing recess 50 of the body 5 for each of the terminal plates 41 and 42. Each wire insertion hole 53 is a vertical position slightly inward in the vertical direction with respect to the contact portions 412 and 422 of the terminal plates 41 and 42, and any of the horizontal direction with respect to the central axis of the shaft portion 442 of the terminal screw 44. It is provided at the left and right positions shifted.

  Further, screw operation holes 54 for exposing the heads 441 of the terminal screws 44 are provided at both upper and lower ends of the body 5. That is, the terminal screw 44 can be operated by a screwdriver (not shown) inserted from the screw operation hole 54. The size and shape of the screw operation hole 54 is sufficiently small to prevent the head 441 of the terminal screw 44 from passing therethrough.

  Further, the terminal nut 43 has a rectangular shape and is prevented from rotating (rotating) with respect to the housing 5 by contacting the inner surface of the housing recess 50.

  When connecting an electric wire (not shown), first, the terminal screw 44 is sufficiently loosened, and the terminal nut 43 is moved in the vertical direction from the electric wire insertion hole 53 (that is, the contact portions 412 and 422 of the terminal plates 41 and 42). Located on the side away from Next, an electric wire is introduced between the terminal nut 43 and the contact portions 412 and 422 through the electric wire insertion hole 53 and the terminal screw 44 is tightened. Then, the electric wire is sandwiched between the terminal nut 43 and the contact portions 412 and 422 that are displaced outward in the vertical direction as the terminal screw 44 is tightened, and the connection of the electric wire is completed here. Here, as shown in FIG. 4, the rear surface of the housing 5 is provided with a reference groove 13 having the same length as the length of the wire to be peeled off. According to the length of 13, the coating of the electric wire can be peeled off.

  Further, in the storage recess 50, there are restricting portions 55 that are in contact with the left and right end portions of the terminal nut 43 and limit the movable range of the terminal nut 43 relative to the housing 5 in the up and down direction. Is provided. Thereby, the movable range of the terminal nut 43 with respect to the housing 5 is limited to the extent that the terminal nut 43 is not separated from the terminal screw 44.

  As described above, the switch body 1 is embedded in the embedded hole (not shown) provided in the wall material using the plate 21 and the two mounting brackets 22. .

  The plate 21 is made of, for example, synthetic resin, and has a through hole 210 through which the switch body 1 is inserted and has a square shape slightly larger than the size and shape of the operation handle 31 viewed from the front. In addition, from both the upper and lower sides of the insertion hole 210, coupling pieces 216 whose thickness direction is directed in the vertical direction are provided so as to protrude rearward. Further, at the tip of each coupling piece 216, four engaging projections 211 are provided on the inward surface in the vertical direction so as to protrude inward in the vertical direction side by side. In the main body 520 of the cover 52, two engaging holes 11 are provided side by side on both the upper and lower surfaces, and one engaging convex portion 211 is inserted into each engaging hole 11. Thus, the switch body 1 is coupled to the plate 21. Further, the engagement convex portion 211 can be repeatedly engaged with and disengaged from the engagement hole 11 by elastically deforming the coupling piece 216 of the plate 21, whereby the switch body 1 can be attached to and detached from the plate 21. ing. In the present embodiment, the switch body 1 is located at the center of the insertion hole 210 by using the two engagement protrusions 211 at the center of the four engagement protrusions 211 on both the upper and lower sides of the switch body 1. Attached to. However, two switch bodies 1 are arranged side by side with respect to one plate 21 by using all the engaging convex portions 211 and changing the operation handle 31 to a half size in the left-right direction. It can also be attached. In addition, on the rear surface of the plate 21, three positioning convex portions 215 are provided on the upper and lower sides of the insertion hole 210 so as to protrude rearward in the left-right direction. In addition, on the upper and lower surfaces of the cover 52, two sandwiching protrusions 12 are provided on the rear side of the engagement hole 11 so as to protrude side by side. That is, positioning of the switch body 1 with respect to the plate 21 is achieved by sandwiching the positioning protrusions 215 of the plate 21 on the upper and lower sides of the cover 52 by the sandwiching protrusions 12 of the cover 52. When there is one switch body 1 attached to the plate 21, the center positioning protrusion 215 is used among the three positioning protrusions 215 arranged on the left and right, and one switch body 1 is attached to the plate 21. In this case, two positioning protrusions 215 on the left and right of the three positioning protrusions 215 arranged on the left and right are used.

  Each mounting bracket 22 is coupled to the plate 21 by a mounting screw 23 that passes through the mounting bracket 22 and a mounting nut 24 to which the mounting screw 23 is screwed. Specifically, each mounting bracket 22 is made of, for example, a metal plate, and has a main body portion 221 having a screw insertion hole 220 through which the mounting screw 23 is inserted, and outward in the left-right direction from both upper and lower end portions of the main body portion 221. And an attachment claw 222 projecting obliquely rearward. The mounting nut 24 has a rectangular shape, and is prevented from rotating with respect to the mounting bracket 22 by being sandwiched between the mounting claws 222 on the rear side of the body portion 221 of the mounting bracket 22. In addition, on the front surface of the plate 21, screw storage recesses 212 for storing the heads of the mounting screws 23 are provided on both the left and right sides of the insertion hole 210. Furthermore, a screw insertion hole 213 that is a through hole through which the shaft portion of the mounting screw 23 is inserted is opened on the bottom surface of each screw storage recess 212. Each mounting bracket 22 is screwed with a mounting screw 23, that is, the mounting screw 23 is inserted into the screw insertion hole 213 of the plate 21 and the screw insertion hole 220 of the mounting bracket 22 and screwed into the mounting nut 24. Thus, it is coupled to the plate 21. Here, on the rear surface of the plate 21, the rotation-preventing convex portions 214 protrude rearward at positions where the mounting bracket 22 is sandwiched from above and below. The mounting bracket 22 is prevented from rotating (so-called accompanying rotation) with respect to the plate 21 in the process of being fixed to the plate 21 by being sandwiched between the rotation prevention convex portions 214.

  In order to fix the plate 21 to the wall material, the mounting bracket 22 in which the tip of the mounting claw 222 is introduced to the rear side of the wall material through the embedding hole is fixed to the plate 21. Then, the plate 21 is fixed to the wall member by the wall member being sandwiched between the front end of each mounting claw 222 and the rear surface of the plate 21 in the front-rear direction.

  Here, in the switch body 1, the portion to which a load is applied when attaching to and detaching from the plate 21 is the engaging convex portion 19 in the conventional example, but in this embodiment, the portion is the front portion of the engaging hole 11. And the said site | part in this embodiment has the site | part which continues in the shape which protrudes back on both right and left sides, and it becomes difficult to generate | occur | produce a damage rather than the engagement convex part 19. FIG.

  On the other hand, the portion of the plate 21 to which a load is applied when the switch body 1 is attached / detached is the portion on the rear side of the engagement hole 219 (lower side in FIGS. 7 and 8) in the conventional example. In the embodiment, the engaging convex portion 211 is relatively easily damaged. However, in general, the plate 21 is less expensive (unit price) for replacement than the switch body 1.

  According to the above configuration, the engagement convex portion 211 that is relatively easily damaged when the switch body 1 is repeatedly attached to and detached from the plate 21 is provided on the plate 21 that is generally lower in unit price than the switch body 1. Therefore, the maintenance cost can be reduced as compared with the case where the engaging projection 19 is provided on the switch body 1 side.

DESCRIPTION OF SYMBOLS 1 Switch main body 11 Engagement hole 21 Plate 210 Insertion hole 211 Engagement convex part

Claims (1)

A switch body embedded in an embedding hole provided in the wall material;
A plate having an insertion hole through which the switch body is inserted and detachably coupled to the switch body and fixed to the wall material;
The coupling between the switch body and the plate is achieved by engaging engagement protrusions provided at portions facing each other across the switch body in the plate into engagement holes provided in the switch body. A switch characterized by being made.

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