JP2942348B2 - Piano handle switch - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a structure of a piano handle switch.

[Prior Art] A wave switch is conventionally used in a switch rated at 300 V and 1.5 A generally used in houses and the like.

By the way, since the conventional wave switch has problems in operability and design, there is a demand for the development of a push-button type which does not involve a handle position when the switch is turned on and off. And in the conventional push button switch, the conversion method to the switch inversion operation has a deeper embedding depth,
There are problems such as poor workability.

Then, what was proposed is a switch of a piano handle type.

Next, the operation of the conventional piano handle switch will be described with reference to FIGS. 38 to 44.

First, when the piano handle (the piano handle is omitted in FIG. 38) is pushed down in the state of FIG. 38, the push button handle 32 is pushed down against the spring piece 37a of the return spring 37, and the push button handle 32 is pushed down. As a result, the slide cam 33 is lowered, and the upper side of the reversing handle 31 in which the vicinity of the base of the inside inclined surface of the engaging cam body 38 at one end (left side in FIG. 38 (b)) of the slide cam 33 is inclined. 38 (b).
39 (b), when the push button handle 32 is pressed against the plate, the engaging projection 34 is pushed down along the inner inclined surface of the engaging cam body 38, and the reversing handle 31 is moved in FIGS. 40 (b) to 42. As shown in FIG. By the way, slide cam
When one of the engagement cams 38 of the slide 33 slides while engaging with one of the engagement protrusions 34 of the inversion handle 31, the other engagement cam 38 moves and the other of the engagement cams 38 moves before the inversion handle 31 that rotates to be horizontal is horizontal. The length between the pair of engaging cam bodies 38 and the length between the pair of engaging projections 34 are set so as to be located inside the engaging projections 34. With the above configuration, the push button handle 32
Hook projection due to reversal of reversing handle 31 by pushing down
34 is FIG. 38 (b), FIG. 38 (b) → FIG. 40 (b) → 41
Fig. 42 (b) → rotates counterclockwise as shown in Fig. 42 (b),
38 (a), FIG. 39 (a) → FIG. 40 (a) → FIG. 41 (a) → FIG. As shown in FIG. 42 (a), it slides to the left, and as shown in FIG. 41 (b), during the reversal of the reversing handle 32, the reversing handle 32 is turned to a position beyond the horizontal and the other engaging projection is turned. Even if 34 is raised, since the slide cam 33 slides to the left, the engagement cam body 38 at the other end (right side in FIG. 39 (b)) is located on the left side of the engagement projection 34 on the right side. That is, the reversing handle 31 and the reversing rotation are not hindered. As described above, when the push button handle 32 is pressed down to rotate the reversing handle 31 in reverse, the reversing handle 31 is reversed while sliding the slide cam 33 against the spring piece 33a, thereby turning the reversing handle 31 and the slide cam 33. Are able to smoothly turn the reversing handle 31 in reverse without receiving sliding frictional resistance.

When the reversing handle 31 is reversingly rotated as described above, the coil spring 30 reciprocates and swings, and the opening / closing body 24 is reversed,
The movable contact 29 is separated from the one fixed contact 25a with which the movable contact 29 is in contact, and comes into contact with the other fixed contact 25b.

When the pressing force of the piano handle is released after this inversion, the push button handle 32 is pushed up by the spring piece 37a of the return spring 37 as shown in FIG. 43 (b), and the piano handle returns to the original state. At the same time, the slide cam 33 also has a spring piece.
The spring returns to the central position by the spring force of 33a, and the state shown in FIG. 43 (a) is obtained. If the piano handle 43 is pressed down in this state, the opening / closing body 24 can be inverted by the same operation as described above. After the reversal, if the pressing force of the piano handle is released, the state returns to the state shown in FIG.

 FIG. 37 is a top view of the slide cam 33 of the conventional example.

[Problems to be solved by the invention]

By the way, in the above conventional example, when the pressing operation force of the piano handle is released, the push button handle 32 and the piano handle are automatically returned by the above-described operation, and the slide cam 33 is also returned in the middle thereof. Since a gap is provided between the handle 32 and the slide cam 33 so that the slide cam 33 can slide, when the slide cam 33 returns, the slide cam 33 itself vibrates due to the force at the time of return, and a loud noise as shown in FIG. There is a problem that a pressure return sound is generated and the sound is continued for a long time.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a piano handle switch in which the return sound of the slide cam generated during operation is reduced and the duration thereof is shortened. is there.

[Means for Solving the Problems] In order to achieve the above object, the invention according to claim 1 has an opening / closing body 24 rotatably supported to open and close a contact portion, and a head having a head from the surface of the body. A push button handle 32 that is exposed and is movably mounted in the body in a direction perpendicular to the exposed surface.
And the opening / closing body 24 is moved one by one in conjunction with the pushing of the push button handle 32.
A push button handle 32 provided with a reversing means for reversing the rotation, a return means mounted in the body and for urging the push button handle 32 in the front exposure direction, and one side rotatably provided outside the push button switch 5. It comprises a piano handle 43 pivotally supported and the back surface of which is in contact with the head of the push button handle 5. As a reversing means, the opening / closing body 24 is connected to the opening / closing body 24 via a coil spring 30 to rotate the opening / closing body 24. A pivot projection is formed on the surface of the push button handle 32 at both ends so that the seesaw can be freely moved in the direction and the rotation axis direction is parallel to the rotation direction of the piano handle 43. Reversing handle 31
Of the engaging cam bodies 38 formed at both ends in conjunction with the pushing of the push button handle 32, the engaging cam body corresponding to one engaging projection 34 approaching the push button handle 32 due to the inclination of the reversing handle 31. A slide cam 33 made of synthetic resin which slides on the back surface of the push button handle 32 in a direction perpendicular to the pushing direction while pressing and engaging the engaging projection 34 at 38 to apply a reversing rotational force to the reversing handle 31; 33, a return elastic member which is formed integrally with the push button handle 32 and has a free end coupled to the push button handle 32 side so as to provide a resilient force in the anti-sliding direction with respect to the sliding of the slide cam 33. In the type switch, a spring body 33b that presses against a side surface of an inner wall of a concave portion 32B formed on the back surface of a push button handle 32 in which the slide cam 33 is slidably arranged is parallel to the sliding direction of the slide cam 33, and is provided with the slide cam 33. Are integrally formed on the side surface of

The invention according to claim 2 is characterized in that, in the above-mentioned switch of the piano handle type, a spring piece 33c for pressing the slide cam 33 against the back surface of the push button handle 32;
Spring piece which is located below and presses against the upper surface of the return means.
33c 'and 33c'.

According to a third aspect of the present invention, in the piano handle switch, a tapered rib 70 is provided on the back surface of the push button handle 32 at a position facing the return elastic body of the slide cam 33, and an initial position of the slide cam 33 is provided. When returning to the position, the return elastic body is pressed against the tapered surface 70 of the rib 70.

According to the first aspect of the present invention, when the pressing force of the piano handle 43 is released, the push button handle 32 and the piano handle 43 automatically return by the return means of the push button handle, and the slide cam 33 also returns to this position. Along with this, the operation is returned by the action of the return elastic body, but at this time, the push button handle 32 for slidably disposing the slide cam 33 is provided.
Slide cam 33 on the side of the inner wall of the recess 32B
The spring body 33b integrally formed on the side surface of the slide cam 33 comes into contact with the slide cam 33 to apply a brake, so that the vibration of the slide cam 33 is suppressed to suppress the generation of a return sound, and the slide cam 33 is pressed on the lower surface of the push button handle 32. It can be automatically returned to the center initial position.

According to the second aspect of the present invention, the spring piece 33c that presses the slide cam 33 against the back surface of the push button handle 32 and the spring piece 33c 'that is located below the slide cam and presses against the surface of the return means are provided. Since they are integrally provided, the spring piece 33 of the slide cam 33 is used at the time of return, similarly to the first aspect of the invention.
c, 33c 'are pressed against the back surface of the push button handle 32 and the surface of the return means to apply a brake, so that the vibration of the slide cam 33 is suppressed to suppress the generation of a return sound, and the push button handle 32 of the slide cam 33 is suppressed. Can be automatically returned to the initial position at the center of the lower surface.

According to the third aspect of the present invention, the tapered rib 70 is provided on the rear surface of the push button handle 32 at a position facing the return elastic member of the slide cam 33, and when the slide cam 33 returns to the initial position, Since the return elastic body is pressed against the tapered surface 70a, the return elastic body of the slide cam 33 presses against the tapered surface 70a of the rib 70 at the time of return, and a bouquet is applied, thereby suppressing the vibration of the slide cam 33. As a result, the generation of a return sound can be suppressed, and the slide cam 33 can be automatically returned to the center initial position on the lower surface of the push button handle 32.

EXAMPLES The present invention will be described below in detail based on examples shown in the accompanying drawings.

1 to 12 show an embodiment corresponding to the first aspect of the present invention. The push button switch 5 shown in FIG. 1 has a body formed of a synthetic resin body 5a and a synthetic resin cover 5b. The push button switch 5 has a body locking leg 10 hanging down from a pair of opposite side surfaces of the cover 5b. The provided body engaging hole 10a is engaged with the engaging projection 9 of the body 5a by being engaged. The push button switch 5 is formed in a size of one module of a standardized wiring device.

The locking claws 11a, 11b corresponding to the locking holes 8 formed on the longitudinal sides of the both sides 2b, 2b of the mounting frame 2 on both sides of the cover 5b.
Respectively, and a cover 5 is provided on the back of one of the locking claws 11b.
A space 12 for obtaining a bending allowance formed by a hole vertically penetrating the outer wall of b is formed, so that the locking claw 11b can be flexed elastically backward. A locking projection 70 is provided on one end side of the upper portion of the cover 5b, and a fulcrum projection 71 protrudes slightly inside the locking projection 70. Has a hole 72 at the other end thereof, and an opening edge of the hole 72 is a locking edge 72a.

Connection terminal housings 13 and 14 are formed on both sides of the body 5a, and one connection terminal housing 13 has a common terminal plate 15, a locking spring 16,
A terminal for storing a side connection terminal composed of a release button 17, and a terminal plate 18 for forming a first connection terminal, a locking spring 19, and a terminal for forming a second connection terminal are stored in the other connection terminal storage part 14. The plate 20 and the lock spring 21 are housed therein, and a common release button 22 is housed in the first and second connection terminals.

The terminal plate 18 is provided with an extension piece 18a.
Reference numeral 8a extends over the partition wall 14a and extends into the central storage portion 23, and further close to the partition wall 14a side. The extension piece 18a is provided with a fixed contact 25a.

The terminal plate 20 is located along the inner wall of the body 5a.
The fixed contact 25b corresponding to the fixed contact 25a is provided at the front end of the bent piece 20a.

The opening / closing body 24 is formed of a conductive plate,
The projection 28 provided at the lower end of both ends is
The lower end of the V-shaped concave portion 27 is rotatable about the center with the lower end edge in contact with the support 15a. Then, the movable contact 29 provided on both upper surfaces of the opening / closing body 24 contacts and separates from the fixed contacts 25a and 25b according to the rotation, and the common connection terminal portion and the first or second connection terminal portion Between the on and off.

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

The lower portion of the coil spring 30 is locked by a spring seat 24a provided at the upper edge of the horizontal piece of the opening / closing body 24, and the upper portion is
The opening / closing member 24 is inserted into a cylindrical portion 31a integrally protruding from the lower portion of the opening 1 to invert the opening / closing body 24 in accordance with the movement of the inversion handle 31 in both directions.

The reversing handle 31 is inserted into the recess 51 from below into a hole 52 opened at the bottom of the recess 51 of the cover 5b, and the inverted triangular shaft 31c provided on both sides of the lower tubular portion 31a of the reversing handle 31 is connected to the cover 5b. Engagement projections 34, 34 that engage with the slide cam 33 are protrudingly provided on both sides of a rectangular parallelepiped portion 31 b on the upper part of the reversing handle 31 so as to be rotatably supported on a bearing 50 on the inner wall.

The push button handle 32 is housed in the recess 51 so as to be able to move up and down by locking the locking projections 36 and 36 in the vertical locking grooves 35 formed on the inner wall surfaces on both sides of the recess 51 of the cover 5b, Flat 37
A return spring 37, which is formed by integrally extending two return spring pieces 37a, 37a extending downward from b, is provided on the back surface of the push button handle 32 in a hole 37d formed in the flat piece 37b. By inserting a projection (not shown), it is attached to the back surface of the push button handle 32, and is constantly urged upward by pressing the tip of the return spring piece 37 a, 37 a of the return spring 37 against the bottom surface of the recess 51.

The slide cam 33 is formed of a thermoplastic resin having high elasticity, such as polyacetal, in a substantially rectangular shape, and a hook cam body 38 corresponding to the hook protrusion 34 of the reversing handle 31 projects on a temporary surface on the opposite side. And a pair of spring pieces 33a, 33a integrally protruding in a C-shape at the center of another side portion,
A projection 32A formed on the back surface of the push button handle 32 is inserted between the tips of the spring pieces 33a, 33a, and the slide cam 33 is slidably mounted on the back surface of the push button handle 32, and
A return force in the anti-sliding direction is given by the elasticity of the wires 33a.

The push button switch 5 configured as described above covers the lower end of the vertical side of one side piece 2b of the mounting frame 2 by fitting the cover 5b from below into the window hole 6 of the metal mounting frame 2 shown in FIG.
If the contact point is rotated with the contact point as a fulcrum in a state of contact with the upper peripheral surface of 5b, the locking claw 11a on the fulcrum side engages with the locking hole 8, and
The lower end of the vertical side of the other side piece 2b pushes the locking claw 11b inward by the bending allowance of the space 12 and the elastic force of the material of the cover 5b to get over the locking claw 11b and engage the locking claw 11b. Engage the stop hole 8. The push button switch 5 locked with the locking claws 11a and 11b engaged with the locking holes 8 and 8, respectively, causes the push button handle 32 to protrude from the window hole 6 of the mounting frame 2.

The push button switch 5 attached to the attachment frame 2 in this manner is provided with a piano handle 43. This piano handle
Reference numeral 43 is as shown in FIGS. 3 and 4, in which a locking foot 43a provided on one side edge of the piano handle 43 is locked to the locking projection 70 of the cover 5b, and With the lower surface of the piano handle 43 in contact with the other side edge of the piano handle 43, the locking foot 43
b into the hole 72 at the other end of the cover 5b so as to be movable up and down, and the locking portion of the locking foot 43b is locked to the locking edge 72a of the hole 72.
It is locked to. When the locking feet 43a and 43b are released, the piano handle 43 can be removed. With the piano handle 43 attached as described above, the push button handle 32 can be pushed and driven by pushing and rotating the piano handle 43. In this state, the semicircular projection 73 on the upper surface of the push button handle 32 contacts the lower surface of the piano handle 43.

Here, as shown in FIG.
A gap is formed inside the side portion on the distal end side of a to provide elasticity, and spring bodies 33b and 33b are extended on both sides thereof, and the spring piece 33b is pushed as shown in FIG. When the slide cam 33 is slidably housed in the concave portion 32A on the back surface of the concave portion 32A, the spring body 33b
The tip of the is lightly pressed.

Next, the operation of the piano handle switch of this embodiment will be described with reference to FIGS.

First, the piano handle 43 in the initial increase in FIG.
When the user pushes on the piano handle 43 (FIG. 6), the push button handle 32 is pushed down against the spring piece 33a. One (Fig. 6 (b)
In the state where the base of the inner inclined surface of the engaging cam body 38 at the end on the left side is inclined, it hits the engaging projection 34 on the upper side (left side in FIG. 7B) of the reversing handle 31 (see FIG.
When the push button handle 32 is further pressed, the engaging projection 34 is pushed down along the inner inclined surface of the engaging cam body 38, and the reversing handle 31 is turned on, as shown in FIGS. 8 (b) to 10 (b). )
It turns reversely like. Here, when one engagement cam body 38 of the slide cam 33 slides while being engaged with one engagement protrusion 34 of the inversion handle 31, the other engagement cam body 38 is rotated before the inversion handle 31 that rotates in reverse turns horizontal. The length between the pair of engaging cam bodies 38 and the length between the pair of engaging projections 34 are set so as to move and be positioned inside the other engaging projection 34.
With the above-described configuration, the engaging projection 34 is moved to the sixth position in accordance with the inversion of the inversion handle 31 due to the depression of the push button handle 32.
Figure (b), Figure 7 (b) → Figure 8 (b) → Figure 9 (b)
→ Rotating counterclockwise as shown in FIG. 10 (b), and with this rotation, the staking cam body 38 against the staking projection 34 against the spring piece 33a, FIG. 6 (a), FIG. (A) → FIG. 8 (a) → FIG. 9 (a) → Slide to the left as shown in FIG. 10 (a), and in the course of inversion of the inversion handle 32 as shown in FIG. 9 (b). Even if the reversing handle 32 is rotated to a position beyond the horizontal and the other engaging projection 34 is raised, the slide cam 33 is slid to the left so that the other end (the right in FIG. 8B) Is located on the left side of the right engagement protrusion 34 so that the rotation of the inversion handle 31 is not hindered. As described above, when the reversing handle 31 is reversed by pressing down the push button handle 32, the reversing handle 31 is reversed by sliding the slide cam 33 against the spring piece 33a. Can smoothly turn the reversing handle 31 without receiving sliding frictional resistance.

When the reversing handle 31 is reversingly rotated as described above, the coil spring 30 reciprocates and swings, and the opening / closing body 24 is reversed,
The movable contact 29 is separated from the one fixed contact 25a with which the movable contact 29 is in contact, and comes into contact with the other fixed contact 25 (b).

When the pressing force of the reversing handle 3143 is released after the reversing, the push button handle 32 is pushed up by the spring piece 37a of the return spring 37 as shown in FIG. 11 (b), and the original push button handle is returned to its original state as shown in FIG. 12 (b). The state returns to the original state, and the piano handle 43 also returns to the original state. At the same time, the slide cam 33 is also moved by the spring force of the spring piece 33a from the state shown in FIG. 10 (a) to the state shown in FIG. 11 (a).
The state returns to the initial state of FIG. 12 (a), but when returning from the state of FIG. 10 (a) to the state of FIG. 11 (a), the spring body 33b of the slide cam 33 is pressed against the inner wall of the recess 320 of the push button handle. The brake is applied by lightly pressing against the side surface so as to absorb the gap between the concave portion 32B and the slide cam 33. Then, the engagement between the slide cam 33 and the reversing handle 31 is released, and the slide is returned to the central portion to return to the initial state of FIG. 12 (a). Also at this time, the spring body of the slide cam 33
The brake is applied by pressing the 33b against the inner wall side surface of the recess 32B. Therefore, it is possible to suppress the generation of vibrations when the slide cam 33 returns, and to reduce the sound pressure of the return sound and the generation time thereof as shown in FIG. If the piano handle 43 is pressed down in this state, the opening / closing body 24 can be inverted by the same operation as described above. After the inversion, if the pressing force of the piano handle 43 is released, the state returns to the state shown in FIG.

In the above embodiment, the spring body 33b is provided in order to apply a brake when the slide cam 33 returns, but as shown in FIG. 14, the side wall of the slide cam 33 has elasticity and spring pieces 33a, Projection 32A inserted between 33a
15, the side wall 33f may be pressed against the inner wall side surface of the recess 32B of the push button handle 32 when the protrusion 32A is in contact with the protrusion 33e as shown in FIG.

In this case, in the initial state of FIG. 16, the side wall 33f is pressed against the inner wall side surface of the pressing portion 32B in a state where the projection 32A hits the projection 33e. FIGS. 18, 18 and 19, the slide cam 33 slides through the same operation as in the above embodiment, and the projection 32A starts from the projection 33e and moves between the side wall 33f of the slide cam 33 and the inner wall side of the recess 32B. The pressed state is released, and the reversal is completed as shown in FIG. When the pressing force of the piano handle 43 is released in this state, the slide cam 33 attempts to return to the initial state by the returning force as described above, but at this time, the protrusion 33e of the side wall 33f of the slide cam 33 does not press the protrusion 32A. Therefore, the slide cam 33 smoothly returns to the substantially central portion shown in FIG. 21, and until this state returns to the initial state in FIG. 22, the protrusion 33e of the side wall 33f is pushed by the protrusion 32A, and the side wall 3 is pressed.
3f presses against the inner wall side surface of the concave portion 33B to apply a brake, thereby suppressing the generation of vibration of the slide cam 33, reducing the return sound and shortening the generation time as shown in FIG. In each of the above embodiments, spring means for pressing against the inner wall side surface of the concave portion 32B of the push button handle 32 are formed integrally with the slide cam 33. As shown in FIG. One piece is formed integrally, a protrusion 33d for pressing against the back surface of the push button handle 34 is provided at the tip of a pair of spring pieces 33c in one diagonal direction, and a pair of spring pieces 33c 'in the other diagonal direction. Projections 33d 'are provided at the ends for pressing against the upper surface of the return spring 37, as shown in FIG.

After pushing down the piano handle 43 from the initial state to the completion of the reversal as shown in FIGS. 25 to 29, when the pressing force of the piano handle 43 is released, the slide cam 33 as shown in FIGS. 30 and 31 is released. In this sliding return, the protrusion 33d 'of the spring piece 33c' is pressed against the return spring 37, and the protrusion 33d of the spring piece 33c and the push button handle are returned.
By pressing against the back surface of 32, the brake is applied in the same manner as in the above embodiment, and the vibration of the slide cam 33 is suppressed to reduce the return sound and shorten the generation time as shown in FIG.

In each of the above embodiments, the brake is applied by providing a spring means on the slide cam 33 side, but FIGS. 33 (a) and 33 (b)
As shown in FIG. 35, a tapered rib 70 is provided on the back surface of the push button handle 32 at a position facing the spring pieces 32a, 32a of the slide cam 33, and as shown in FIG. 35 from the state before the return of the slide cam 33 in FIG. Then, when the slide cam 33 returns to the initial position, the spring pieces 32a, 32a may be in contact with the tapered surface 70a of the rib 70, and the brake may be applied as in the above embodiment. FIG. 39 is an actual measurement example of the return sound of the present embodiment.

[Effect of the Invention] The invention according to claim 1 is a piano handle switch, in which a side surface of an inner wall of a concave portion formed on a back surface of a push button handle in which the slide cam is slidably arranged is parallel to a sliding direction of the slide cam. Since the spring body that presses against the slide cam is integrally formed on the side surface of the slide cam, the slide cam is slidably disposed at the time of return, and the inner wall of the concave portion formed on the back surface of the push button handle is parallel to the slide direction of the slide cam. The spring body integrally formed on the side surface of the slide cam comes into contact with the side surface of the slide cam to cause a blemish on the slide cam. As a result, the vibration of the slide cam is suppressed, the generation of the return sound is suppressed, and the generation time is shortened. Can be automatically returned to the initial position at the center of the mask of the push button handle, and the spring body is integrated with the slide cam. Therefore, there is an effect that there is no cost increase, and it is difficult to move in the initial state where the deformation of the return elastic body of the slide cam is the smallest, and it is easy to move in the state where the deformation of the return elastic body is the largest, so that the switch is turned on and off. The effect is that the reliability of the conditions necessary for the operation can be ensured.

According to the second aspect of the present invention, the spring piece that presses the slide cam against the back surface of the push button handle and the spring piece that is located below the slide cam and presses against the surface of the return means are integrally provided. Therefore, in addition to the same effects as those of the first aspect, there is an effect that the gap relationship between the slide cam, the push button handle, and the return means does not change.

According to a third aspect of the present invention, in the piano handle switch, a tapered rib is provided on a back surface of the push button handle at a position facing the return elastic body of the slide cam,
When the slide cam returns to the initial position, the return elastic body is pressed against the tapered surface of the rib, so that at the time of return, the return elastic body of the slide cam presses against the tapered surface of the rib,
The brake is applied, so that the vibration of the slide cam is suppressed, the generation of the return sound is suppressed, the generation time is shortened, and the slide cam can be automatically returned to the initial position at the center of the lower surface of the push button handle. There is a push button handle to press the return elastic body on the upper tapered surface,
There is an effect that the gap of the slide cam and the return means can be absorbed within a certain range.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a push-button switch according to an embodiment of the present invention, and FIGS. 2 (a) and 2 (b) are cross-sectional views of the same prior to pressing the piano handle and states after pressing. FIG. 3 is an exploded perspective view showing the same pushbutton switch, mounting frame, and piano handle, FIG. 4 is a perspective view of the same piano handle as seen from behind, and FIG. FIG. 6 to FIG. 12 are operation explanatory views of the same,
FIG. 13 is a graph showing the measured characteristics of the return sound of the embodiment, and FIG.
FIG. 11 is an enlarged plan view of the push button handle showing the relationship between the push button handle and the slide cam according to another embodiment of the invention described from the back,
15 to 21 are explanatory diagrams of the operation of the above, FIG. 22 is an actual measurement characteristic diagram of the return sound of the above, and FIG. 23 shows the relationship between the push button handle and the slide cam of one embodiment of the invention according to claim 2. FIG. 24 is an enlarged plan view of the push button handle as viewed from the back, FIG. 24 is an explanatory view showing the relationship between the protrusion of the spring piece of the slide cam, the push button handle, and the return spring, and FIGS. Destruction, 32nd
FIGS. 33 (a) and 33 (b) are enlarged sectional views and enlarged plan views of main parts of a push button handle which can be partially omitted. 34 and 35 are explanatory diagrams of the operation of the above, FIG. 36 is a measured characteristic diagram of the return sound of the above, FIG. 37 is a plan view of a conventional slide cam, and FIGS.
FIG. 43 is an explanatory diagram of the operation of the above, and FIG. 44 is a measured characteristic diagram of the return sound of the above. 5 is a push button switch, 24 is an opening / closing body, 30 is a coil spring, 31 is a reversing handle, 32 is a push button handle, 33 is a slide cam, 33b is a spring body, 34 is a hooking projection, 38 is a hooking cam body, and 43 is a piano handle. It is.

Claims (3)

(57) [Claims] An opening / closing body rotatably supported in a body and opening and closing a contact portion, a push button handle movably mounted in the body, and an opening / closing body interlocked with the pushing of the push button handle. A push button switch provided with a reversing means for reversing once, and a return means mounted in the body and for urging the push button handle in a forward exposure direction, and one side rotatably provided outside the push button switch. A pivot handle and a piano handle whose back surface is in contact with the head of the push button handle. The reversing means is connected to the opening / closing body via a coil spring to move the seesaw in the rotating direction of the opening / closing body. A reversing handle that is freely formed with a hooking projection on the surface on the side of the push button handle,
Of the engaging cams formed at both ends in conjunction with the pushing of the push button handle, the engaging cam corresponding to one engaging protrusion approaching the push button handle due to the inclination of the reversing handle presses the engaging protrusion. A synthetic resin slide cam that slides on the back surface of the push button handle in the direction perpendicular to the push direction while engaging to apply a reversing rotational force to the reversing handle, and is integrally formed with the slide cam, and on the push button handle side A return elastic member that provides a resilient force in the anti-sliding direction with respect to the sliding of the slide cam by being coupled to the free end thereof, wherein the push button handle has the slide cam slidably disposed. A piano hand, wherein a spring body for pressing against a side surface of an inner wall of a recess formed on a back surface of the slide cam parallel to a sliding direction of the slide cam is integrally formed on a side surface of the slide cam. Formula switch. An opening / closing body rotatably supported in the housing for opening and closing a contact portion, a push button handle movably mounted in the housing, and an opening / closing body interlocked with the pushing of the push button handle. A push button switch provided with a reversing means for reversing once, and a return means mounted in the body and for urging the push button handle in a forward exposure direction, and one side rotatably provided outside the push button switch. A pivot handle supported by a piano handle having the back surface in contact with the head of the push button handle. The reversing means is connected to the opening / closing body via a coil spring to move the seesaw in the rotating direction of the opening / closing body. A reversing handle that is freely formed with a hooking projection on the surface on the side of the push button handle,
Of the engaging cams formed at both ends in conjunction with the pushing of the push button handle, the engaging cam corresponding to one engaging protrusion approaching the push button handle due to the inclination of the reversing handle presses the engaging protrusion. A synthetic resin slide cam that slides on the back surface of the push button handle in the direction perpendicular to the push direction while engaging to apply a reversing rotational force to the reversing handle, and is integrally formed with the slide cam, and on the push button handle side A resilient member which, when the free end is coupled thereto, provides a resilient force in a direction opposite to the sliding direction of the slide cam, and which presses the slide cam against the back surface of the push button handle. And a spring piece positioned below the slide cam and pressed against the surface of the return means. An opening / closing body rotatably supported in the housing to open and close the contact portion; a push button handle movably mounted in the housing; and an opening / closing body interlocked with the pushing of the push button handle. A push button switch provided with a reversing means for reversing once, and a return means mounted in the body and for urging the push button handle in a forward exposure direction, and one side rotatably provided outside the push button switch. A pivot handle supported by a piano handle having the back surface in contact with the head of the push button handle. The reversing means is connected to the opening / closing body via a coil spring to move the seesaw in the rotating direction of the opening / closing body. A reversing handle that is freely formed with a hooking projection on the surface on the side of the push button handle,
Of the engaging cams formed at both ends in conjunction with the pushing of the push button handle, the engaging cam corresponding to one engaging protrusion approaching the push button handle due to the inclination of the reversing handle presses the engaging protrusion. A synthetic resin slide cam that slides on the back surface of the push button handle in the direction perpendicular to the push direction while engaging to apply a reversing rotational force to the reversing handle, and is integrally formed with the slide cam, and on the push button handle side The free end is coupled to a return elastic body that provides a resilient force in a direction opposite to the sliding of the slide cam in a sliding direction. The return elastic body of the slide cam on the back surface of the push button handle. Piano hanks, wherein tapered ribs are provided at opposing positions, and the return elastic body is pressed against the tapered surface of the ribs when the slide cam returns to the initial position. Le switch.