JPH0741059Y2 - Switch device mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a mounting structure of a switch device for mounting a large handle.

[Prior Art] Conventionally, there is a synthetic resin mounting frame as a mounting frame for mounting a wiring device such as a switch device.

Since this mounting frame has a structure that locks the wiring device by locking the locking claws of the wiring device to the bending piece provided on the mounting frame side, it can be mounted more easily than the metal mounting frame that is caulked and fixed. It has the feature of being easy.

[Problems to be Solved by the Invention] Although the conventional synthetic resin mounting frame can be easily mounted, the mounting frame 2 is attached to the embedded box 1 by the box mounting screw 3 as shown in FIG. When fixed, the central part sinks to the embedded box 1 side by tightening the box mounting screw 3 and both ends bend forward so that the wiring device mounted on the mounting frame 2 mounts the large flat plate-shaped handle 4. In the case of the switch device 5, there is a problem in that the operation stroke of the large handle 4 is insufficient when the large handle 4 is operated and the operation stroke of the large handle 4 becomes insufficient, making it impossible to open and close the switch.

The present invention has been made in view of the above-mentioned problems, and the purpose thereof is to easily attach the switch device, and the mounting frame itself has a high strength so that the mounting frame does not bend when fixed. An object is to provide a mounting structure for a switch device that does not cause a malfunction even in a switch device equipped with a large handle.

[Means for Solving the Problems] In the present invention, both side frame pieces of a metal mounting frame in which a window hole is formed in the center and mounting holes are formed in both end frame pieces are compared with the length dimension of the horizontal side. It is formed in a substantially inverted L-shaped cross-section with the length of the vertical side increased, and is integrally provided on both side surfaces of the front portion of the switch device in which the front portion is fitted between both vertical sides so that the operating portion faces the window hole. Lock holes for locking the locking claws are drilled on both vertical sides, and the front part of the switch device is formed using elastic synthetic resin,
At least one of the locking claws is provided with a space for bending the locking claw at the back, and when the switch device is fitted into the window hole of the metal mounting frame, the ends of the vertical sides are brought into contact with each other to make the metal structure. An opposing surface, which serves as a rotation fulcrum of the mounting frame, is provided around the front portion.

[Operation] However, according to the present invention, since both side frame pieces of the metal mounting frame are formed in a substantially inverted L-shaped cross-section, the length dimension of the vertical side is larger than the length dimension of the horizontal side. Even if it is fixed to the embedded box using the mounting holes of the frame pieces on both ends with the boss screws, it has rigidity due to the vertical sides of the frame pieces on both sides, and the strength does not become so strong that the center part does not sag. Therefore, even if a switch device equipped with a large-sized handle is attached, it is possible to prevent an operation failure such that the handle hits the attachment frame and the stroke is insufficient when the handle is operated.

Further, the front part of the switch device is formed by using a synthetic resin having elasticity, and a space for allowing the bending of the locking claw is provided at the back part of at least one of the locking claws and abutting against the end of the vertical side. Since the surface is provided around the front part, at the time of mounting the switch device on the mounting frame, at least one locking claw on the switch device side bends so that the front part of the switch device is placed between the vertical sides. By pushing from the side, the locking claw can be locked in the locking hole of the vertical side of the mounting frame, and the end of the vertical side can be brought into contact with the facing surface around the front part of the switch device. The switch device can be fixed securely and easily.

[Embodiment] FIG. 1 shows a perspective view of a mounting frame 2 used in a mounting structure of a switch device according to the present invention. The mounting frame 2 is formed by punching and bending a metal plate such as iron or stainless steel. Both end pieces 2a, 2a are bent at both ends in a substantially inverted U shape, and both end pieces 2b, 2b connecting the both end portions 2a, 2a are bent at a substantially L-shaped cross section. A central hole surrounded by the two end pieces 2a, 2a constitutes a window hole 6 that faces the front part of the switch device 5 described later, and its size corresponds to a mounting size module of three wiring devices.

Each end piece 2a, 2a is provided with a mounting hole 7 for inserting a box mounting screw for mounting in an embedded box.

Further, each of the side pieces 2b, 2b is provided with three locking holes 8 at equal intervals, and a pair of corresponding locking holes 8 on both sides correspond to one wiring device.

Now, when the mounting frame 2 used in the present invention is fixed, the bending is E
Although it is proportional to (elastic modulus of material) x I (second moment of area), the elastic modulus is significantly larger than that of conventional synthetic resin, and the second moment of area I is the length of the vertical side of the side piece 2b. It is set to be large by making the length dimension longer than the length dimension of the lateral side.

The geometrical moment of inertia I of an inverted L-shaped cross section as shown in FIG. 2 can be obtained from the following equation.

I = 1/3 {b ₂ e ₂ ³ -b ₁ (e ₂ -h ₂ + h ₁ ) ³ + (b ₂ -b ₁ ) e ³ } e ₁ = (b ₂ h ₂ ² -b ₁ h ₁ ² ) / 2 (b ₂ h ₂ -b ₁ h ₁ ) e ₂ = h ₂ -e ₁ where the length of the vertical side is shorter than the length of the horizontal side,
For example, if the thickness is 1.4 mm, b ₂ is 7 mm, and h ₂ is 3.4 mm, the secondary sectional moment I is 7.32 mm, but the length of the vertical side is longer than the length of the horizontal side. , Thickness is 1.4mm, b ₂ is 3.
In the case of an embodiment in which 4 mm, h ₂ is 7 mm and has the same sectional area as the above case, the second sectional moment I is 57.6 mm,
A value that is about eight times larger than that of the preceding example can be obtained.

FIG. 3 shows an exploded perspective view of an embodiment of the switch device 5, and this switch device 5 forms a body with a synthetic resin body 5a forming a rear part and a synthetic resin cover 5b forming a front part. In particular, the cover 5b is made of a thermoplastic resin molded product having elasticity, and when the body 5a is attached to the body 5a, the body locking claws 10 which are integrally projected from the lower portions on both sides are provided in the locking hole 9 of the body 5a.
Lock as shown. Further, on the cover 5b, locking claws 11a, 11b corresponding to the locking holes 8 formed on the vertical sides of the both side pieces 2b, 2b of the mounting frame 2 are integrally projecting on both side surfaces, respectively, and A space 12 for obtaining a bending allowance is formed at the back portion of the retaining claw 11b by a hole penetrating the outer wall of the cover 5b as shown in FIG. 4, and the locking claw 11b elastically moves backward. It is able to bend.

The body 5a has connection terminal accommodating parts 13 and 14 formed on both sides,
3 has a common terminal plate 15 that constitutes a common connection terminal, and a lock spring 1
A quick-connect terminal composed of 6, 16 and a release button 17 is accommodated, and the other 14 comprises a first connecting terminal composed of a terminal plate 18 and a locking spring 19, and a second connecting terminal composed of a terminal plate 20 and a locking spring 21. A connection terminal and a release button 22 common to the first and second connection terminals are housed side by side. The common terminal plate 15 is extended downward from the center, and the tip of the extended piece is attached to the support plate 15a of the opening / closing body 24 arranged at the bottom of the central housing portion 23 of the body 5b on the primary side of the current transformer CT. Connected through.

The terminal plate 18 has an extension piece 18a extending downward in the central storage portion 23 so as to ride over and along the partition wall 14a of the connection terminal storage portion 14, and the fixed contact 25a is provided on the extension piece 18a. There is. Further, the terminal plate 20 extends along the inner wall of the body 5b into the central storage portion 23, bends the tip end thereof along the partition wall of the connection terminal storage portion 13, and attaches the fixed contact to the tip end of the bent piece 20a. 25a
Is provided with a fixed contact 25b.

A printed circuit board 26 on which a display circuit is laid is placed on top of these terminal boards 18 and 20, and terminals 18b and 20b protruding from each terminal board 18 and 20 are inserted into the connection holes 26a and 26a of the printed board 26. Then it is fixed by soldering.

The opening / closing body 24 is formed of an L-shaped conductive plate, and projections 28, 28 that engage with the recesses 27, 27 formed in the support plate 15a are formed on the lower edge of the horizontal piece. The movable contacts 29 provided on both sides of the vertical piece are contacted with the fixed contacts 25a, 25b according to the rotation, which are arranged in the central storage portion 23 so as to be rotatable in the vertical direction with the locking points of the 28, 28 as fulcrums. It is designed to open,
The common connection terminal and the first connection terminal or the second connection terminal are turned on and off.

It is the coil spring 30 that drives the opening / closing body 24 in reverse.
And a reversing handle 31, a push button handle 32, a slide cam 33, and the like.

The lower part of the coil spring 30 is locked to a spring seat 24a provided on the upper edge of the lateral piece of the opening / closing body 24, and the upper part thereof is turned over.
The opening / closing body 24 is driven to be reversed in accordance with the turning of the reversing handle 31 in both directions by being inserted into the cylindrical portion 31a which is integrally provided at the lower part of the reversing handle 31a.

The reversing handle 31 is rotatably supported by shaft bearings 31c provided on both side surfaces of a rectangular parallelepiped portion 31b provided on an upper portion of the tubular portion 31a, on a bearing of an inner wall of the cover 5a, and opens at a bottom portion of a recess 50 of the cover 5a. It is to be inserted into the recess 50 from below through the hole 51, and engaging projections 34, 34 for engaging with the slide cam 33 are provided at upper portions on both sides of the rectangular parallelepiped portion 31b. This hanging protrusion 3
4,34 has the inner surface formed into an R surface.

The push button handle 32 is vertically movably housed in the recess 32a by locking the locking projections 36, 36 in the vertical locking grooves 35, 35 formed on both inner wall surfaces of the recess 50 of the cover 5b. In addition, two pairs of return spring pieces 37a, 37a, which are spread downward, are integrally extended downward from both side edges of the flat piece 37b, and a return spring 37 is integrally formed on the flat piece 37b. By inserting the protrusion 32a protruding from the lower surface of the push button handle 32
Attached to the bottom surface, return spring pieces 37a, 37a of this return spring 37
The tip is elastically urged upward by elastically contacting the bottom surface of the recess 50.

Further, the return spring 37 is a return spring piece 37c, 37c for the slide cam 33 integrally formed on the flat piece 37b from both side edges of the flat piece 37b.
c has a protrusion 33a protruding from the center of one end surface of the slide cam 33 between the tip widths of the return spring pieces 37c, 37c, and between the flat piece 37b and the lower surface of the push button handle 32. A slide cam 33 is attached so as to be swingable in both directions.

The slide cam 33 has engaging cam bodies 38 corresponding to the engaging protrusions 34 of the reversing handle 31 projecting from the lower surfaces of both side ends, and when the push button handle 32 is pushed down, the upper engaging of the reversing handle 31 in a tilted state. Push down the tip of the protrusion 34 along the inside inclined surface of the corresponding hooking cam body 38 to reverse the handle.
The slide cam 33 moves laterally while rotating 32 and simultaneously sliding the tip of the engaging cam body 38 on the opposite side along the R surface inside the engaging protrusion 34 as it is pushed down. Invert and rotate 31. This reversing rotation causes the coil spring 30 to reciprocately swing to invert the opening / closing body 24, separate from the fixed contact 25a or 25b with which the movable contact 29 is in contact, and contact the other fixed contact 25b, 25a. To do.

The display circuit displays this switching of contacts. One connection terminal that connects one end of the power supply and one fixed contact 25b.
When a current flows between the movable contact 29 of the opening / closing body 24, the support plate 15a, the current transformer CT, the common terminal plate 15, the load, and the other end of the power supply, the current transformer CT changes the load current. It detects and outputs the light-emitting diode LED by the detection output.
Further, the opening / closing body 24 is inverted so that the movable contact 29 is moved to the other fixed contact 25.
When switched to a and connected to a, when the load is turned off, current flows from the power source connected between the connection terminal portions to the circuit composed of the neon tube L and the resistor R ..., and the neon tube L lights up. Reference numeral 39 in FIG. 3 denotes a storage cover for the current transformer CT, which is attached to the center of the lower surface of the body 5a. Reference numeral 40 denotes a neon tube cover which is fitted into the hole 41 of the cover 5b to illuminate the light of the neon tube L to the outside. Hole 42 is a light emitting diode
It is a hole for inserting the LED head from the inside and exposing it to the outside.

Then, the switch device 5 configured as described above is attached to the mounting frame 2
When mounting the switch, the cover 5b of the switch device 5 is fitted into the window hole 6 of the mounting frame 2 from below as shown in FIG. 6 (a). First, as shown in FIG. When the lower end of the vertical side of the one side piece 2b is in contact with the upper surface of the peripheral portion of the cover 5b, the engaging claw 11a on the fulcrum side is formed in the engaging hole 8 when the contact point is used as a fulcrum to rotate in the arrow direction. Lock in and the other side piece 2
At the lower end of the vertical side of b, the locking claw 11b is pressed backward by the bending allowance of the space 12 and the elastic force of the material of the cover 5b.
And the locking claw 11b is engaged in the locking hole 8. In this manner, the push button handle 32 is attached to the switch device 5 which is locked and fixed as shown in FIG. 6C by engaging the locking claws 11a and 11b into the locking holes 8 and 8 respectively. It is made to project from the window hole 6 of the frame 2.

A large handle 43 is attached to the switch device 5 attached to the attachment frame 2. This large handle 43 is a piano switch type handle, and a locking foot 43a provided on one side edge is rotatably locked between a lateral side of one side piece 2b of the mounting frame 2 and a cover 5b of the switch device 5. Then, the locking foot 43b provided on the other side edge is vertically movably engaged with the locking space 44 shown in FIG. 6 (c) formed between the cover 5b and the other side piece 2b of the mounting frame 2. The push button handle 32 can be pushed and driven by stopping and mounting the handle 43 by pushing and rotating the handle 43.

[Advantage of the Invention] In the present invention, the length of the vertical side is longer than the length of the horizontal side of both side frame pieces of the metal mounting frame in which a window hole is formed in the center and mounting holes are formed in the frame pieces on both ends. Since it is formed in a substantially inverted L-shaped cross section with a large sizing, both side frame pieces are rigid and strong by the vertical sides even if they are fixed to the embedded box with box fixing screws using the mounting holes of both end frame pieces. Since it is stronger, the central part of the mounting frame does not sag, and even if a switch device with a large handle is attached, the handle hits the mounting frame and the stroke is insufficient when operating the handle. There is no such a problem, and it has the effect of preventing operation failure, and furthermore, it is integrally provided on both side surfaces of the front part of the switch device that fits the front part between both vertical sides to expose the operation part to the window hole. Locking holes that lock the locking claws on both sides The front side of the switch device is made of synthetic resin having elasticity, a space for bending of the locking claw is provided at the back of at least one of the locking claws, and a window hole of the metal mounting frame is provided. When the switch device is fitted to the switch device, the end face of the vertical side is brought into contact with the opposite surface of the metal mounting frame, which serves as a rotation fulcrum, is provided around the rear part of the switch device. At this time, at least one locking claw on the side of the switch device bends, so that the front part of the switch device is pushed from the rear side of the mounting frame between the vertical sides so that the locking claw is a locking hole on the vertical side of the mounting frame. Since the end of the vertical side can be brought into contact with the facing surface around the front part of the switch device, the switch device can be securely and easily fixed.

[Brief description of drawings]

FIG. 1 is a perspective view of a mounting frame used in the embodiment of the present invention, and FIG.
The figure is an explanatory view of the secondary sectional moment in the same as above, Fig. 3 is an exploded perspective view of the switch device used in the same as above, Fig. 4 is a sectional view in the same as above, Fig. 5 is a top view in the same as above, and Fig. 6 (a). (C) is an assembly explanatory view of the same as above, and FIG. 7 is an explanatory view of a conventional example. 2 is a mounting frame, 2a is an end piece, 2b is a side piece, 5 is a switch device,
5a is a body, 5b is a cover, 6 is a window hole, 7 is a mounting hole, 8 is a locking hole, 11a and 11b are locking claws, 12 is a space, and 43 is a large handle.

Claims (1)

[Scope of utility model registration request] 1. A lengthwise dimension of a vertical side compared to a lengthwise dimension of a horizontal side of a metal mounting frame having a window hole formed in the center and mounting holes formed at both ends of the frame. It is formed in a substantially L-shaped cross section, and the front part of the switch device that fits the front part between both vertical sides to expose the operating part to the window hole is locked with locking claws integrally provided on both side surfaces. Locking holes are formed on both vertical sides, the front part of the switch device is formed using elastic synthetic resin, and a space for flexing allowance of the locking claw is provided on the back of at least one of the locking claws. Further, when the switch device is fitted in the window hole of the metal mounting frame, an end face of the vertical side is brought into contact with the switch mounting device, and a facing surface serving as a fulcrum of rotation of the metal mounting frame is provided around the rear part of the switch device. Switch device mounting structure.