JP4129068B2 - Seesaw switch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seesaw switch having a relatively large current capacity (for example, for 45A).
[0002]
[Prior art]
Conventionally provided seesaw switches use a body formed by combining two parts of a body and a cover to support the handle so as to be swingable with respect to the body, and a cover for holding the handle A structure is often employed in which a fulcrum holding groove communicating with the body side is formed and a fulcrum protrusion protruding from the side surface of the handle is inserted into the fulcrum holding groove from the body side. This is because the assembling work becomes troublesome in a configuration in which a shaft hole is provided in one of the cover and the handle and a shaft provided in the other is fitted. In the configuration in which the handle is swung by inserting the fulcrum protrusion into the fulcrum holding groove, it is necessary to urge the handle using a spring force so that the fulcrum protrusion always contacts the inner peripheral surface of the fulcrum holding groove. Therefore, a configuration is employed in which the handle is biased in the direction opposite to the direction in which the pressing force is applied to the handle by using the spring force of the reversing spring for inverting the contact device of the seesaw switch.
[0003]
[Problems to be solved by the invention]
As described above, in a seesaw switch that uses a spring force to bring the fulcrum protrusion of the handle into contact with the inner peripheral surface of the fulcrum holding groove of the body, when the handle is pushed, the spring is compressed and the handle is The operation feels like sinking into the body. In particular, since a seesaw switch having a large current capacity uses a reversing spring having a relatively large spring constant, the operation force for pushing the handle is large, and a non-smooth movement is likely to occur during operation.
[0004]
The present invention has been made in view of the above-described reasons, and an object of the present invention is to provide a seesaw switch that can be smoothly operated without a sense of incongruity by preventing rattling during operation of the handle.
[0005]
[Means for Solving the Problems]
The invention of claim 1 includes a handle that is exposed on one surface of the container and that performs a seesaw operation by a pressing operation, and a two-pole contact device that is simultaneously opened and closed in accordance with the seesaw operation of one handle. It is formed by combining a body housing the contact device and a cover that has an operation window that exposes the handle and is covered by the body, and an inner peripheral surface of the operation window on the inner peripheral surface of the operation window in the cover A fulcrum holding groove is formed in which the fulcrum protrusions protruding from both sides of the handle are inserted from the body side, and the contact surface between the fulcrum protrusion and the fulcrum holding groove swings the handle. The handle is formed in an arc shape with the center as the center, and the handle is urged by a spring force so that the fulcrum protrusion is always in contact with the inner peripheral surface of the fulcrum holding groove. It had an arc-shaped sliding contact surface at the tip. With dynamic control projection is projected on the back side, make contact with the sliding surface on the placing portion formed in a portion of the partition wall a facing surface partitioning between 2-pole the contact device with the handle in the body Thus , the seesaw operation is performed in a state where a part of the handle is in contact with the partition wall of the body, and the mounting portion is formed in an arc shape along the sliding contact surface . According to this configuration, since the movement restricting protrusion for moving the handle to the seesaw is provided on the handle while the sliding contact surface is in contact with the mounting portion provided on the body, the fulcrum protrusion is provided on the inner peripheral surface of the fulcrum holding groove. Even if a pressing force is applied to the handle against the spring force to be contacted, the handle does not sink into the body due to the movement restricting projection being in contact with the mounting portion, and the sliding contact surface of the handle Since it is formed in an arc shape centered on the swing center, the sliding contact surface of the movement restricting projection smoothly contacts the mounting portion when swinging the handle, and the handle can be operated smoothly without a sense of incongruity. It can be done. Further, since the fulcrum protrusions projecting on both side surfaces of the handle and the fulcrum holding grooves formed on the cover come into contact with each other, the handle can be swung more smoothly. Furthermore, by operating a two-pole contact device with a single handle, the electric circuit can be cut into two, and the configuration is suitable for opening and closing a relatively large current.
[0009]
According to a second aspect of the present invention, in the first aspect of the invention , there is provided a first contact terminal plate disposed along the bottom surface of the body and provided with a swing fulcrum, and a fixed contact disposed along the bottom surface of the body. The contact device is constituted by the second contact terminal plate and a switch that swings around the swing fulcrum and pivots the movable contact with the fixed contact. Of the peripheral wall of the storage chamber for storing the contact device, a portion corresponding to a position between the first contact terminal plate and the second contact terminal plate is formed with a recessed portion recessed in a direction away from the fixed contact. It is. According to this configuration, even when the arc is generated when the movable contact is separated from the fixed contact and the carbide adheres to the wall surface of the storage chamber, the creeping distance between the fixed contact and the movable contact is increased by the recessed portion. As a result, the decrease in insulation resistance in the open state is small, and the tracking resistance is enhanced.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
(Embodiment 1)
As shown in FIG. 1 to FIG. 9, a handle 2 that exposes a concave operation surface is exposed on the front surface (upper surface in FIG. 1) of a container 1 made of an insulating material such as synthetic resin. Then, the handle 2 is configured to perform a seesaw operation by pressing the side projecting from the front surface of the container 1 among the left and right ends of the handle 2 in FIG. A lamp cover 31 for taking out light from a lamp, which will be described later, out of the container 1 is attached to the front upper portion of the container 1. Metal assembly frames 13 are provided on both sides of the container 1. The assembly frame 13 is formed in a substantially U-shape, and a pair of attachment pieces 13c are erected on one side edge of the central piece 13a, and the attachment pieces 13c are attachments that serve as attachment portions to the decorative plate. A hole 13d is formed. A pair of mounting claws 13e project from the side edge of the central piece 13a of the assembly frame 13 opposite to the mounting piece 13c. Further, a bifurcated portion 13f is formed at the tip of each leg piece 13b of the assembly frame 13 respectively.
[0011]
The mounting holes 13d and the mounting claws 13e are formed so as to be compatible with a mounting frame used in a switch box mounting embedded wiring device referred to as a large-angle continuous type defined in the JIS standard. The dimensions of the two modules are set.
The container body 1 is a combination of a box-shaped body 11 whose upper surface is opened in FIG. 1 and a cover 12 covered on the opening side of the body 11 from the assembly frame 13 described above. Shoulder portions 14 with which the central piece 13a of the assembly frame 13 abuts are formed on both sides, and the outer peripheral surface of the container 1 corresponding to both ends of the shoulder portion 14 straddles the outer peripheral surfaces of the cover 12 and the body 11. The assembling groove 15 is formed in such a manner. Therefore, if the center piece 13a of the assembly frame 13 is brought into contact with the shoulder portion 14 and the leg piece 13b is fitted in the assembly groove 15, the assembly frame 13 is formed by opening the forked portion 13f of the assembly frame 13. As a result, the body 11 and the cover 12 are mechanically coupled to each other. Here, an insulating rib 11 a is projected from a portion corresponding to the assembly groove 15 on the opening edge of the body 11. The insulating rib 11a protrudes closer to the cover 12 than the opening surface of the body 11, and has a function of increasing a creeping distance between a contact device 41 (described later) disposed inside the body 11 and the assembly frame 13. Yes. Therefore, the insulating rib 11a can cope with a high voltage.
[0012]
An operation window 16 for exposing the handle 2 and a display window 17 to which the lamp cover 31 is attached are formed on the front surface of the cover 12. The operation window 16 and the display window 17 are formed so as to be aligned in the longitudinal direction of the central piece 13a of the assembly frame 13. A fulcrum holding groove 18 into which a fulcrum protrusion 21 serving as a fulcrum projecting from both side surfaces of the handle 2 is inserted is formed on the inner peripheral surface of the operation window 16. The fulcrum holding groove 18 is open on the side of the cover 12 facing the body 11 and on the inner peripheral surface of the operation window 16, and is not open on the front side of the container 1. Therefore, if the handle 2 is attached to the operation window 16 from the rear side and the fulcrum protrusion 21 is inserted into the fulcrum holding groove 18, the fulcrum protrusion 21 is locked at a position where it abuts the front end of the fulcrum holding groove 18. Here, a locking projection 18 a is projected on the inner bottom surface of the fulcrum holding groove 18, and when the fulcrum projection 21 is inserted to a predetermined position of the fulcrum holding groove 18, the locking projection 18 a is engaged with the concave and convex portions. In combination, the fulcrum protrusion 21 is temporarily held. That is, when the handle 2 is attached to the operation window 16, the handle 2 is temporarily held with respect to the cover 12 by the engagement protrusion 18 a of the fulcrum holding groove 18 engaging the rear end edge of the fulcrum protrusion 21. It is. The front end portion of the fulcrum holding groove 18 and the front end portion of the fulcrum protrusion 21 (see FIG. 10) are formed in an arc shape (a shape forming a part of an arc) centering on the swing center of the handle so as to be in surface contact with each other. Yes. Therefore, the handle 2 is prevented from shaking in the direction indicated by the arrow X in FIG.
[0013]
The interior of the body 11 is basically divided into two storage chambers 22 via a partition wall 19 extending from the bottom surface of the body 11 to the opening surface. Each storage chamber 22 stores a contact device 41. A mounting portion 19 a is formed on the upper surface of the central portion of the partition wall 19. The mounting portion 19a has an arc shape that forms a part of an arc centered on the swing center of the handle 2, and is a lower end surface of the movement restricting projection 26 that protrudes on the back surface (lower surface in FIG. 1) of the handle 2. The slidable contact surface is in contact. The sliding contact surface of the movement restricting protrusion 26 is formed in an arc shape that forms a part of an arc centered on the swing center of the handle 2 as in the mounting portion 19a, and therefore during the swing (seesaw operation) of the handle 2. In addition, the sliding contact surface of the movement restricting projection 26 and the mounting portion 19a are always in surface contact. In this way, a part of the handle 2 abuts against the partition wall 19 of the body 10, so that the handle 2 does not sink into the body 1 even if a pressing force is applied to the handle 2, and the movement restricting projection 26 is mounted. As the mounting portion 19a comes into surface contact, the handle 2 swings smoothly without rattling.
[0014]
Each contact device 41 includes a first contact terminal plate 42 having a swing fulcrum portion 42a protruding in a mountain shape on the upper surface side in FIG. 1, a second contact terminal plate 43 having a fixed contact 43a, and a swing fulcrum. It comprises an opening / closing element 44 that swings about the portion 42a as a fulcrum and moves the movable contact 44a to and away from the fixed contact 43a along with the swing. The first contact terminal plate 42 and the second contact terminal plate 43 are both made of conductive sheet metal material, and the main pieces 42 b and 43 b including the swing fulcrum portion 42 a or the fixed contact 43 a extend along the bottom surface of the body 11. It is formed in the shape arranged. However, as shown in FIG. 6, a bottom-up rib 47 projects from the bottom surface of the body 11, and the main pieces 42 b and 43 b are supported by the bottom-up rib 47. Therefore, the main pieces 42 b and 43 b are separated from the bottom surface of the body 11. Further, a projection 47a provided on the body 11 is interposed between the main pieces 42b and 43b so that the main pieces 42b and 43b are not in direct contact with each other. Terminal pieces 42d and 43d are integrally connected to the main pieces 42b and 43b via connecting pieces 42c and 43c. The connecting pieces 42c and 43c are substantially L-shaped, and the connecting pieces 42c and 43c and the terminal pieces 42d and 43d are substantially U-shaped.
[0015]
As shown in FIGS. 6 and 7, the opening / closing element 44 is curved in a concave shape like the operation surface of the handle 2, and a movable contact 44 a is provided at one end. Positioning notches 44b are formed on both side edges in the vicinity of the center of the opening / closing element 44 in the longitudinal direction, and the positioning protrusions 11b (see FIG. 5) formed on the body 11 are inserted into the positioning notches 44b. Movement in the direction is prohibited. The switch 44 swings with the swinging fulcrum part 42a provided on the contact terminal plate 42 as a fulcrum so that the movable contact 44a is separated from the fixed contact 43a.
[0016]
As shown in FIG. 6, the opening / closing element 44 is guided by a coil spring 24 inserted into a cylindrical portion 23 provided on the handle 2 and a part thereof inserted into the cylindrical portion 23, and is guided by the coil spring 24. It is made to interlock | cooperate with operation of the handle | steering-wheel 2 using the pressing element 25 spring-biased in the direction which protrudes from. That is, when the handle 2 swings around the fulcrum protrusion 21 and the fulcrum holding groove 18, the contact portion between the tip of the pressing element 25 and the opening / closing element 44 moves over the swinging fulcrum part 42a. Is set. As a result, when the tip of the presser 25 is positioned closer to the movable contact 44a than the swing fulcrum 42a by the operation of the handle 2, the movable contact 44a contacts the fixed contact 43a, and the tip of the presser 25 swings. When the fulcrum part 42a is positioned on the side away from the movable contact 44a, the movable contact 44a is separated from the fixed contact 43a. In such a reversing process of the opening / closing element 44, when the tip end portion of the pressing element 25 gets over the swing fulcrum part 42a, the coil spring 24 rapidly expands, so that the opening / closing element 44 snaps. Two cylindrical portions 23 are formed on the handle 2, and two handles 44 can be simultaneously operated by one handle 2.
[0017]
A stop piece 44c is formed on the same surface as the movable contact 44a at the end opposite to the movable contact 44a in the longitudinal direction of the switch 44. When the movable contact 44a is separated from the fixed contact 43a, the stop piece 44c is formed. By contacting the main piece 42b of the contact terminal plate 42, the swing range of the switch 44 is restricted.
The terminal pieces 42d and 43d are formed with inverted U-shaped insertion grooves 42e and 43e in which the bottom side of the body 11 is opened. A tightening screw 46 is inserted into the insertion grooves 42 e and 43 e, and a clamping piece 45 is screwed into the tightening screw 46. The sandwiching piece 45 is disposed at a portion surrounded by the connecting pieces 42c and 43c and the terminal pieces 42d and 43d and is prevented from rotating by the connecting pieces 42c and 43c. Therefore, the distance between the pinching piece 45 and the terminal pieces 42d and 43d can be changed by loosely tightening the tightening screw 46. Two cutout windows 48 are formed on both side surfaces of the body 11 so as to correspond to the two tightening screws 46 of the contact devices 41, respectively. If a tool such as a screwdriver is inserted into the body 11 through the cutout window 48 and the tightening screw 46 is rotated, the distance between the pinching piece 45 and the terminal pieces 42d and 43d can be changed.
[0018]
On the bottom surface of the body 11, electric wire insertion openings 49 are respectively formed at portions corresponding to the clip pieces 45 and the terminal pieces 42 d and 43 d. As shown in FIG. 5, the wire insertion openings 49 are formed near the four corners of the bottom surface of the body 11. Thus, after inserting the electric wire from the electric wire insertion port 49 and then inserting the electric wire between the pinching piece 45 and the terminal pieces 42d and 43d by the tightening screw 46, the electric connection of the electric wire to the contact terminal plates 42 and 43 is achieved. And mechanical holding of the electric wire can be performed simultaneously. By connecting the electric wire in such a form, the contact resistance between the electric wire and the terminal pieces 42d and 43d can be reduced to cope with a large current, and the mechanical holding strength of the electric wire can be increased. It can be done.
[0019]
The internal space of the body 10 is not only partitioned by the partition wall 19, but is also formed with a partition wall 19 b so as to divide the section for storing the terminal pieces 42 d and 43 d and the section for storing the terminal pieces 42 d and 43 d. ing. A notch 19c is formed in the partition wall 19b so as to position the connecting pieces 42c and 43c. That is, the partition wall 19b forms a part of the peripheral wall of the storage chamber 22 in which the contact device 41 is stored. In the partition wall 19b, a recessed portion 19d that is recessed in a direction away from the fixed contact 43a is formed at a corresponding portion between the contact terminal plates 42 and 43. The recessed portion 19d is formed over the entire length from the inner bottom surface of the body 10 to the opening surface. Therefore, even if carbides adhere to the inner peripheral surface of the storage chamber 22 due to an arc generated when the movable contact 44a is separated from the fixed contact 43a, the movable contact 44a and the fixed contact 43a are present due to the presence of the recessed portion 19d. The creepage distance can be increased, and a sufficient insulation distance can be secured. That is, the insulation resistance at the time of opening can be ensured and the safety is increased.
[0020]
By the way, a lamp connection terminal 43f protrudes from the connecting piece 43c of each contact terminal plate 43, and between the lamp connection terminals 43f, an energization display lamp 32 made of a neon tube, a current limiting resistor 33, and the like. Are connected in series. The lamp 32 is disposed so as to correspond to the back side of the lamp cover 31. Further, an insulating plate 34 is disposed between the contact terminal plate 43 and the lamp 32 and the resistor 33 so that the creepage distance is increased.
[0021]
The seesaw switch configured as described above is coupled to the decorative plate 5 in use. As shown in FIG. 11, the decorative plate 5 has a mounting frame 51 that holds the container 1, a plate holding frame 52 that is detachably coupled to the mounting frame 51, and a detachable to the plate holding frame 52. The plate body 53 is configured to cover the front surface of the mounting frame 51 while leaving a part of the container 1 inside the plate holding frame 52.
[0022]
The mounting frame 51 is formed of a metal plate such as stainless steel, and as shown in FIG. 13, has a rectangular mounting window 54 having a size corresponding to a two-module wiring device. The shoulder portion 14 of the vessel body 1 is formed to a size that contacts. In addition, holding claws 55 a and 55 b as protruding portions that are inserted into attachment holes 13 d provided in the assembly frame 13 protrude from both side edges of the attachment window 54. A substantially U-shaped operation hole 56 having an opening on the side of the attachment window 54 is formed in the vicinity of the holding claw 55a formed on one side edge of the periphery of the attachment window 54, and the tip of the minus driver is formed in the operation hole 56. The holding claw 55a can be protruded from the attachment window 54 by inserting an appropriate tool such as the above and plastically deforming the peripheral portion of the operation hole 56. Therefore, in a state where a part of the container 1 is inserted into the mounting window 54 and the holding claw 55b is inserted into the mounting hole 13d, the holding claw 55a is inserted into the mounting hole 13d by plastically deforming the peripheral portion of the operation hole 56. In this case, the container 1 can be coupled to the mounting frame 51 as shown in FIG. Frame mounting screw holes 57 are formed on both side portions of the mounting frame 51, and long holes through which screws for mounting the mounting frame 51 to a construction surface such as a wall surface are inserted in the upper and lower side portions of the mounting frame 51 in FIG. 58 is formed. Further, a pair of cuts 59 are formed in the upper and lower outer edges of the mounting frame 51. A ground screw 60 (see FIG. 11) is screwed onto the mounting frame 51 so that the mounting frame 51 can be easily grounded.
[0023]
As shown in FIG. 14, the plate holding frame 52 has a peripheral wall 61 that surrounds the outer peripheral edge of the mounting frame 51, and overlaps with the outer peripheral portion of the mounting frame 51 on the inner periphery of the peripheral wall 61. A shelf 62 is formed. The plate holding frame 52 is dimensioned so that the thickness dimension of the mounting frame 51 is within the dimension of the peripheral wall 61 when the mounting frame 51 is brought into contact with the shelf 62. Further, the plate body 53 is attached to the opposite side of the mounting frame 51 with the shelf 62 interposed therebetween, and the thickness dimension of the plate body 53 is also set within the dimension of the peripheral wall 61. That is, the thickness dimension of the peripheral wall 61 (the vertical dimension in FIG. 14B) is made larger than the total thickness dimension of the mounting frame 51, the plate body 53, and the shelf 62.
[0024]
A screw insertion hole 63 is formed in the shelf 62 on both sides of the plate holding frame 52 at a portion corresponding to the frame mounting screw hole 57 provided in the mounting frame 51, and a corrugated bent portion is formed around the screw insertion hole 63. 64 is formed. Therefore, the plate holding frame 52 can be coupled to the mounting frame 51 by using screws that are screwed into the frame mounting screw holes 57 of the mounting frame 51 through the screw insertion holes 63 of the plate holding frame 52. Here, even if there is a slight displacement between the mounting frame 51 and the plate holding frame 52, the bending portion 64 can absorb it. In short, even if the mounting frame 51 and the plate holding frame 52 are misaligned due to a slight dimensional error or a difference in expansion rate, the mounting frame 51 can be accommodated in the peripheral wall 61. A total of four cuts 65 are formed on the inner edges of the upper and lower sides of the plate holding frame 52 in FIG. 14A at portions corresponding to the cuts 59 provided in the mounting frame 51. The cut 65 forms a hole together with the cut 59 in a state where the mounting frame 51 and the plate holding frame 52 are coupled.
[0025]
The plate main body 53 has an opening window 71 that is fitted in the peripheral wall of the plate holding frame 52 and exposes a part of the container 1 as shown in FIG. Hooks 72 are formed at portions corresponding to the notches 59 and the notches 65 of the plate holding frame 52. The tip of the hook 72 is formed in a shape that can be engaged with the periphery of the notch 65. That is, the plate body 53 is detachably engaged with the plate holding frame 52 by the hook 72 so as to be detachable. A removal groove 73 is formed on the back side of the plate body 53, and a tool such as the tip of a minus driver is inserted into the removal groove in a state where the plate body 53 is coupled to the plate holding frame 52. The plate body 53 can be removed.
[0026]
With the above configuration, the container 1 and the decorative plate 5 can be handled separately, and the decorative plate 5 can be replaced. In addition, since the decorative plate 5 has the plate holding frame 52 and the plate main body 53 as separate bodies, a combination of these makes possible a variety of designs with a small variety.
[0027]
【The invention's effect】
According to the configuration of the first aspect of the invention, since the movement restricting protrusion for moving the handle to the seesaw in a state where the sliding contact surface is in contact with the mounting portion provided on the body is provided on the handle, the fulcrum protrusion is formed as the fulcrum holding groove. There is an advantage that even if a pressing force is applied to the handle against the spring force that makes contact with the inner peripheral surface of the handle, the handle does not sink into the body because the movement restricting projection is in contact with the mounting portion. In addition, since the sliding contact surface is formed in an arc shape centering on the swing center of the handle, the sliding contact surface of the movement restricting projection smoothly contacts the mounting portion when the handle swings. There is an advantage that it can be operated smoothly without a sense of incongruity. In particular, since the handle operates as a seesaw and a movement restricting protrusion is provided on the back side, the sliding contact surface and the sliding contact surface of the movement restricting protrusion are always in surface contact with the pressing force acting when the handle is operated. As a result, the handle swings smoothly without rattling. Further, by operating a two-pole contact device with a single handle, the electric circuit can be cut into two, and the configuration is suitable for opening and closing a relatively large current.
[0030]
As in the invention of claim 2 , a first contact terminal plate disposed along the bottom surface of the body and provided with a swing fulcrum portion, and a second contact provided with a fixed contact disposed along the bottom surface of the body The contact device is configured by a terminal plate and a switch that swings around a swing fulcrum portion and moves the movable contact to and away from the fixed contact with the swing, and stores the contact device in the body. Of the peripheral wall of the storage chamber, a portion corresponding to a position between the first contact terminal plate and the second contact terminal plate is formed with a recessed portion recessed in a direction away from the fixed contact. Even if an arc is generated when the movable contact is opened and carbide is attached to the wall of the storage chamber, the insulation resistance in the open state is obtained by increasing the creepage distance between the fixed contact and the movable contact by the recess. It is said that there is little decrease in tracking and tracking resistance becomes high There is a point.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an embodiment of the present invention.
FIG. 2 is a bottom view of the same.
FIG. 3 is a front view of the same.
FIG. 4 is a side view of the above.
FIG. 5 is a front view with the cover removed.
FIG. 6 is a cross-sectional view of the above.
FIG. 7 is a cross-sectional view of the above.
FIG. 8 is a perspective view of a body used for the above.
FIG. 9 is a front view of the body used in the above.
FIG. 10 is a side view of a handle used for the above.
11A and 11B show a state of attachment to the decorative plate, wherein FIG. 11A is a front view, FIG. 11B is a side view, and FIG. 11C is a rear view.
12A and 12B show a state of attachment to the same attachment frame, where FIG. 12A is a front view, FIG. 12B is a side view, and FIG. 12C is a rear view.
FIG. 13 is a front view showing a mounting frame used in the above.
14A and 14B show a plate holding frame used in the above, in which FIG. 14A is a front view, FIG. 14B is a side view partially cut away, and FIG. 14C is a bottom view partially cut away.
FIGS. 15A and 15B show a plate body used in the above, wherein FIG. 15A is a front view, FIG. 15B is a side view, FIG. 15C is a partially cutaway bottom view, and FIG.
[Explanation of symbols]
1 container 2 handle 11 body 12 cover 16 operation window 18 fulcrum holding groove 19 partition wall 19a mounting portion 19b partition wall 19d recessed portion 21 fulcrum projection 22 storage chamber 26 position regulating projection 32 lamp 41 contact device 42 contact terminal plate 42a swing Moving fulcrum parts 42d, 43d Terminal piece 43 Contact terminal plate 43a Fixed contact 44 Switch 44a Movable contact

Claims (2)

A handle that is exposed on one surface of the container and that performs a seesaw operation by a push operation; and a two-pole contact device that is simultaneously opened and closed in accordance with the seesaw operation of one handle. The cover has an operation window through which the handle is exposed, and a cover that is covered by the body. The inner peripheral surface of the operation window in the cover includes an inner peripheral surface side of the operation window and a surface facing the body. The fulcrum protrusions that are open and projecting on both side surfaces of the handle are formed with fulcrum holding grooves into which the fulcrum protrusions are inserted from the body side. The handle is urged by a spring force so that the fulcrum protrusion is always in contact with the inner peripheral surface of the fulcrum holding groove , and the handle is slidably contacted in an arc shape centering on the swing center. movement restricting protrusion rear surface having a surface at the tip portion Some of the handle by while being projected, contacting the sliding surface on the mounting portion provided on a part of the partition wall a facing surface partitioning between 2-pole the contact device of the handle in the body to The seesaw switch is characterized in that the seesaw operation is performed in a state of being in contact with the partition wall of the body, and the placing portion is formed in an arc shape along the sliding contact surface . A first contact terminal plate disposed along the bottom surface of the body and provided with a swing fulcrum; a second contact terminal plate disposed along the bottom surface of the body and provided with a fixed contact; The contact device is configured by a switch that swings as a fulcrum and moves the movable contact to and away from the fixed contact with the swing, and the first of the peripheral walls of the storage chamber that houses the contact device in the body. Sea source acme switch of claim 1, wherein a recess that recessing in a direction away from the fixed contacts a portion corresponding is formed between the contact terminal plate and the second contact terminal plate.

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