JP3193786B2 - Piano handle switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch having an operation handle portion of a piano handle type.

[0002]

2. Description of the Related Art First, the structure of a conventional piano handle switch will be described. The pushbutton switch 5 shown in FIGS. 21 to 23 has a body formed of a synthetic resin body 5a and a synthetic resin cover 5b, and is provided on a body locking leg 10 which is suspended from a pair of opposing 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 therewith.

The cover 5b further has locking claws 11a, 11b respectively corresponding to a pair of locking holes 8 formed in the longitudinal sides of both side pieces 2b, 2b of the mounting frame 2 shown in FIG. Are formed integrally with each other, and a space 12 is formed at the back of one of the locking claws 11b so as to obtain a bending allowance formed by a hole vertically penetrating the outer wall of the cover 5b. It can be elastically bent.

On both sides of the body 5a, connection terminal housings 13 and 14 are formed. One connection terminal housing 13 houses a quick connection terminal comprising a common terminal plate 15, a lock spring 16 and a release button 17. The other connection terminal housing 14 has a terminal plate 18, a locking spring 19, and a second connection terminal, which constitute a first connection terminal.
And a release button 2 common to the first and second connection terminal portions.
2 are stored.

An opening / closing body 24 is arranged in contact with and connected to a support plate 15a extending from an end of the common terminal plate 15. An extension piece 18a is provided on the terminal plate 18,
The extension piece 18a extends over the partition wall 14a and extends into the central storage portion 23, and is further close to the wall wall 14a. The extension piece 18a is provided with a fixed contact 25a.

The terminal plate 20 extends into the central storage portion 23 along the inner wall of the body 5a, and its tip is bent along the partition wall of the connection terminal storage portion 13, and the terminal piece 20a is attached to the tip of the bent piece 20a. A fixed contact 25b corresponding to the fixed contact 25a is provided. The opening / closing body 24 is formed of a conductive plate. The opening / closing body 24 is accommodated in the central storage portion 23. It is rotatable around the lower part of the V-shaped recess 27 in a state of being in contact with the support plate 15a.

The movable contacts 29 provided on both upper surfaces of the opening / closing body 24 are fixed to the fixed contacts 25a, 25b in accordance with the rotation.
Contact with and separate from the common connection terminal and the first or second
To turn on and off between the connection terminals. A coil spring 30 to reverse drive the movable member 24, the turning handle 31, a push button handle 32 and the slide cam 33 shown in FIG. 24, a reversing mechanism composed of the return spring 37..

The coil spring 30 is inserted into a cylindrical portion 31a having a lower portion engaged with a spring seat 24a provided on an upper edge of the horizontal piece of the opening / closing body 24 and an upper portion integrally projecting from a lower portion of the reversing handle 31. Then, the opening / closing body 24 is driven to be reversed in accordance with the movement of the reversing handle 31 in both side directions. The reversing handle 31 is inserted into the concave portion 51 from below into a hole 52 opened at the bottom of the concave portion 51 of the cover 5b. Engagement projections 34, 34 which engage with the slide cam 33 project from the upper side of the rectangular parallelepiped portion 31 b of the reversing handle 31.

The push button handle 32 is housed in the recess 51 so as to be able to move up and down by engaging the locking projections 36 and 36 in up and down locking grooves 35 formed on the inner wall surfaces on both sides of the recess 51 of the cover 5b. 2 which is expanded downward from the flat piece 37b.
A projection (not shown) protruding from the lower surface of the push button handle 32 is inserted into a hole formed in the flat piece 37b of the return spring 37 formed by integrally extending the two return spring pieces 37a, 37a downward. As a result, the return spring 37 is attached to the lower surface of the push button handle 32 and is constantly urged upward by elastically contacting the tip of the return spring piece 37a, 37a with the bottom surface of the concave portion 51. In this case, the flat piece 37b is attached to the lower surface side of the slide cam 33 which is slidably fitted in a slide cam sliding groove on the lower surface of the push button handle 32 described later so that the slide cam 33 does not drop. Further, a hooking cam body 38 of a slide cam 33 described later projects through a hole 37d formed in the flat piece 37b.

As shown in FIG. 24, the slide cam 33 is made of a thermoplastic resin such as polyacetal and has a high elasticity. The slide cam 33 slides in the slide cam slide groove on the lower surface of the push button handle 32. It fits freely. A pair of engaging cam bodies 38 corresponding to the engaging projections 34 of the reversing handle 31 are provided on lower surfaces of both side ends of the slide cam 33, respectively, and a substantially central portion is formed integrally with one side from the one side. 26A, a projection 32A (FIG. 26 (a)) formed on the lower surface of the push button handle 32 is inserted between the distal ends of the spring pieces 33a, 33a. 33 is slidably mounted, and the elasticity of the spring pieces 33a, 33a gives a return force in the anti-sliding direction.

The push-button switch 5 having the above-described structure is similar to that shown in FIG.
Cover 5 from below into the window hole 6 of the metal mounting frame 2 shown in FIG.
When the lower end of one side piece 2b of the mounting frame 2 is brought into contact with the upper surface of the periphery of the cover 5b while the lower end of the side piece 2b is in contact with the upper surface of the cover 5b, the engaging claw 11a on the fulcrum side is provided. Engages with the locking hole 8, and the lower end of the vertical side of the other side piece 2 b presses the locking claw 11 b inward by the bending allowance of the space 12 and the elastic force of the material of the cover 5 b to lock the locking claw 11 b inward. 11b, the locking claw 11b is engaged with the locking hole 8. Locking claw 1
The push button switch 5 locked and fixed by engaging 1a and 11b in 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 mounted on the mounting frame 2 is provided with a piano handle 43. As shown in FIG. 24, the piano handle 43 rotatably locks a fulcrum rib 43a provided on one side edge in a concave portion 54 on one side of the cover 5a, and is formed on the other side edge of the piano handle 43. The locking foot 43b is mounted in a locking space 47 on the other side of the cover 5a so as to be vertically movable.

By pressing the other side of the piano handle 43, the piano handle 43 is pivotally movable about the fulcrum rib 43a. By pushing and rotating the piano handle 43, the push button handle 32 is pushed. It can be driven. Next, the operation of the piano handle switch will be described with reference to FIGS. 21, 22, and 26 to 29.

[0014] First, from the state of FIG.
When the button 3 is pushed down, as shown in FIGS. 26 to 28, the push button handle 32 is pushed down against the return spring piece 37a,
When the push button handle 32 is depressed, the slide cam 33 descends, and the reversing handle 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. 27B) of the slide cam 33 is inclined. 31 (FIG. 27)
When the push button handle 32 is further pressed against the engaging projection 34 (left side in (b)), the engaging projection 34 is pushed down along the inner inclined surface of the engaging cam body 38, and the reversing handle 31 is rotated in reverse.

In this case, as the reversing handle 31 is inverted by pushing down the push button handle 32, the engaging projection 34
7 and counterclockwise as shown in FIG. 28 (b), and with this rotation, the engaging cam body 38 is opposed to the spring piece 33a by the engaging projection 34 as shown in FIG. 28 (b). In the middle of the inversion of the inversion handle 32 and the inversion handle 3
2 is rotated to a position beyond the horizontal and the other engaging projection 3
Even if 4 rises, the slide cam 33 slides to the left, so that the engagement cam body 38 at the other end (right side in FIG. 28B) is located on the left side of the engagement protrusion 34 on the right side. As a result, the rotation of the reversing handle 31 is not hindered.

Here, the engaging projection 34 of the reversing handle 31
When the engaging projection 34 is rotated upward, the engaging cam body 38 located on the inner side can escape on the inner inclined surface so that the engaging cam body 38 does not interfere when the engaging protrusion 34 rotates upward. Also,
As described above, when the reversing handle 31 is rotated in reverse by depressing the push button handle 32, the slide cam 33 is rotated.
By inverting the reversing handle 31 while sliding the slide cam 33 against the spring piece 33a, the reversing handle 31 and the slide cam 33 can smoothly rotate the reversing handle 31 without receiving sliding frictional resistance. it can.

When the reversing handle 31 is reversingly rotated as described above, the coil spring 30 reciprocates and swings, the opening / closing body 24 is reversed, and the movable contact 29 is separated from the one fixed contact 25a with which the movable contact 29 is in contact. , Comes into contact with the other fixed contact 25b. After the reversal, when the pressing force of the piano handle 43 is released, the return spring piece 37a of the return spring 37 is released.
As a result, the push button handle 32 is pushed up, and the piano handle 43 also returns to the original state. At the same time, the slide cam 33 slides and returns to the central portion by the spring force of the spring piece 33a, as shown in FIG. Piano handle 4 in this state
3 is pressed down, the opening / closing body 24 is operated in the same manner as described above.
Can be inverted. After this reversal, if the pressing force of the piano handle 43 is released, the state returns to the state shown in FIG.

That is, FIG. 30 shows a state before the piano handle 43 is operated, and the movable contact 29 of the opening / closing body 22 is inclined and contacts the fixed contact 25b side. Then, by pushing the piano handle 43 and passing the opening / closing body 24 in the neutral position in FIG. 31, the opening / closing body 24 is inverted and comes into contact with the fixed contact 25 a as shown in FIG. 32. Next, when the pressing operation on the piano handle 43 is released, the piano handle 43 returns as shown in FIG. 33 as described above.

[0019]

However, in the above-structured piano handle switch, the operation stroke of the piano handle switch is larger than that of an electronic switch or the like, and there is a problem that the user feels uncomfortable when operating the switch. was there. Incidentally, the operation stroke of the electronic switch is about 1 mm, but the operation stroke of the conventional piano handle switch shown in FIG. 21 is about 3.5 mm.
is there. Particularly, in the prior art, the slide cam 33 is provided between the engaging cam bodies 38 on both sides of the pair of return spring pieces 33a,
33a is positioned, so the engaging cam body 3
There is a restriction in shortening the distance between the pair of engaging cams 38. Therefore, the distance L between the pair of engaging projections 34 corresponding to the pair of engaging cam bodies 38 also increases, and as a result, as shown in FIG. The vertical stroke S required for the reversal of the reversing handle 31 to be reversed is S = Lsin θ (where θ is the inclination angle of the reversing handle), so the stroke S becomes long.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a piano handle switch capable of shortening the operation stroke of the piano handle as compared with the prior art. To offer.

[0021]

In order to solve the above-mentioned problems of the prior art and achieve the object of the present invention, a switch of the piano handle type according to the present invention comprises a push button handle 32 which receives a pressing force, and A reversing handle 31 that reverses according to the linear movement of the push button handle 32, and a push button handle 32 interposed between the push button handle 32 and the reversing handle 31.
A return cam 37 for urging the push button handle 32 in a direction opposite to the direction of the pressing operation ;
An inverting mechanism in a coil spring 30 provided on the rolling wheel 31 is driven by the inverted by the inversion mechanism
The coil spring 30 provided on the handle 31
An opening / closing body 24 is provided for opening and closing the contacts by rolling operation . One end of the opening / closing body 24 is supported by the cover 5b,
Is provided, and return spring pieces 33a, 33a are provided on both sides of the slide cam 33, and a pair of engaging cam bodies are provided on the lower surface of the slide cam 33 center between the spring pieces 33a, 33a. 38 protruding,
The slide cam 33 is slidably fitted into the slide cam slide groove 120 on the lower surface of the push button handle, and the spring pieces 33a, 33a on both sides of the slide cam 33 are fitted on both side walls in the slide direction of the slide cam slide groove 120. A pair of engagements provided on the slide cam 33 at the upper part of the reversing handle 31 which is positioned so that the center of the slide cam 33 coincides with the center of the slide cam sliding groove 120 in a state where the slide cam 33 is in contact with and without applying an external force. A pair of hooking projections 34 corresponding to the cam body 38 are provided, and when the push button handle 32 is pressed down, the hooking projections 34 located on the reversing handle 31 which is inclined to one of the reversing rotations are provided. The inner surface of the engaging cam body 38 corresponding to
The engagement protrusion 34 is slid while the engagement cam body 38 is slid.
, And the positional relationship between the pair of engaging cam bodies 38 and the pair of engaging protrusions 34 is set so that the reversing handle 31 is inverted and rotated.

It is also preferable that the pressing position of the push button handle 32 by the piano handle 43 is located farther from the pivotal position of the piano handle 43 than the pivotal position of the reversing handle 31.

[0023]

According to the present invention having the above-described structure, the return spring pieces 33a, 33a are provided on both sides of the slide cam 33, respectively, and both spring pieces 33a, 33a are provided.
A pair of engaging cam bodies 38 are protruded from the lower surface of the center portion of the slide cam 33 between them, and the slide cam 33 is slidably fitted into the slide cam sliding groove 120 on the lower surface of the push button handle. Spring pieces 33a, 33 on both sides
a is positioned such that the center of the slide cam 33 coincides with the center of the slide cam slide groove 120 in a state where no external force is applied by abutting on both side walls of the slide cam slide groove 120 in the sliding direction, A pair of engaging projections 34 corresponding to a pair of engaging cam bodies 38 provided on the slide cam 33 are provided on the upper part of the reversing handle 31, and when the push button handle 32 is pressed down, it is inclined to one of the reversing rotation. The hooking projection 34 located on the reversing handle 31 has the hooking projection 3
4 is pressed against the inner surface of the engaging cam body 38 corresponding to 4 so that the engaging cam body 38 is slid against the spring pieces 33a, 33a, and the engaging projection 34 is pushed down so that the reversing handle 31 is rotated in reverse. By setting the positional relationship between the engaging cam body 38 and the pair of engaging projections 34, the spring piece 33
a, a pair of engaging cam bodies 3 without being restricted by 33a
8, the distance between the pair of engaging projections 34 corresponding to the pair of engaging cam bodies 38 can be shortened accordingly. As a result, the vertical stroke of the reversing handle 31 can be shortened, and the piano handle 43 can be shortened. Can be shortened.

Further, by setting the pressing position of the push button handle 32 by the piano handle 43 at a position farther from the pivot position of the piano handle 43 than the pivot position of the reversing handle 31, the operation stroke of the piano handle 43 can be further reduced. It can be shortened.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. Since the configuration of the entire switch is the same as the conventional example,
The gist of the present invention will be described in detail. First, the slide cam 33 which is a feature of the present invention will be described with reference to FIG.
As shown in the figure, the main body of the slide cam 33 is substantially H-shaped. Engaging cam bodies 38 project downward from both sides of the central piece 33b, which is integrally continuous between the central parts of the two horizontal pieces 33a. The engagement cam body 38 has an inclined inner surface. Returning spring pieces 33a, 33a inclined from both ends of one horizontal piece 33a, respectively, are integrally extended. Here, the pair of engaging cam bodies 38 are both spring pieces 33.
The distance between the pair of engaging cam bodies 38 can be set short without being restricted by the two spring pieces 33a, 33a. An elastic guide piece 33c is provided on the other horizontal piece 32a.

As shown in FIG. 18, a slide cam slide groove 120 is formed in the lower surface of the push button handle 32, and the slide cam 33 is slidably fitted in the slide cam slide groove 120. In this case, the spring pieces 33a on both sides of the slide cam 33 are
In the state where the slide cam 33 is in contact with both side walls in the sliding direction of 0 and no external force is applied, the center of the slide cam 33 is
To match the center. Further, the elastic guide piece 33a elastically contacts the inner wall of the slide cam sliding groove 120 along the sliding direction, so that the slide cam 33 can slide smoothly in the sliding cam sliding groove 120 without rattling. It is like that.

As shown in FIG. 17, the return spring 37 has a flat piece 37b and return spring pieces 37a, 37a which are expanded downward.
Are integrally formed, and a hole 37d is provided in the flat piece 37b. A projection 3 is provided on the lower surface of the push button handle 32 so that a return spring 37 is provided in a mounting hole formed in the flat piece 37b.
2b is attached to the lower surface of the push button handle 32, and the return spring pieces 37a, 37a
The front end is constantly urged upward by elastically contacting the bottom surface of the concave portion 51. In this case, as shown in FIG. 19, the flat piece 37b is mounted on the lower surface side of the slide cam 33 which is slidably fitted in the slide cam sliding groove 120 on the lower surface of the push button handle 32. This prevents the slide cam 33 from falling. A pair of engaging cam bodies 38 are opposed to holes 37d provided in the flat piece 37 and protrude downward.

A pair of engaging projections 34 corresponding to a pair of engaging cam bodies 38 provided on the slide cam 33 are provided on the upper part of the reversing handle 31. The inner surface of the engaging cam body 38 corresponding to the engaging projection 34 abuts on the engaging projection 34 located on the reversing handle 31 in an inclined state, and slides the engaging cam body 38 against the spring pieces 33a, 33a. The positional relationship between the pair of engaging cam bodies 38 and the pair of engaging projections 34 is set such that the engaging projection 34 is pushed down while being moved, and the reversing handle 31 is inverted. Then, as described above, the pair of engaging cam bodies 38 are connected to the two spring pieces 33a, 33a.
The distance between the pair of engaging cam bodies 38 can be set short without being restricted by the two spring pieces 33a, 33a by being disposed between the pair of engaging cam bodies 38. The distance between the pair of engaging projections 34 can be shortened. Incidentally, conventionally, as shown in FIG. 20A, L is 10, 4 mm, and θ is 6 ° 3.
0 ', the stroke S of the reversing handle is 1.
It was 18 mm, but according to the present invention, L was 4.4 mm,
θ can be set to 4 ° and the reversing handle stroke S is 0.3
It can be made 1 mm. Further, a decrease in L means that the slide amount of the slide cam 33 can be reduced, and therefore, the length of the height component of the inclined surface of the engaging cam body 38 of the slide cam 33 can be shortened (for example, Conventionally, this height was 0.35 mm but 0.2
5 mm). Therefore, the gap for returning the slide cam 33 is set to 0.1 mm, and the gap between the slide cam 33 and the push button handle 32 is set to 0.1 m.
m, the stroke S ₂ of the push button handle 32 is 0.31
+ 0.25 + 0.1 + 0.1 = 0.76 mm, which is 1.18+ which is the stroke of the conventional push button handle 32.
0.35 + 0.2 (conventional slide cam return gap) + 0.1 = 1.83 mm.

Further, shown in FIG. 20 (b), the relationship between the pressing position to the push button handle 32 of the piano handle 43, the stroke S ₁ of the piano handle 43, and the stroke S ₂ of the push button handle 32, S ₁ = S ₂ × (L ₁ / L ₂ ) (L ₁ is the total length of the piano handle 43, and L ₂ is the length of the piano handle 43 from the pivotal support position.
Is the distance to the pressed position of the push button handle 32). Therefore, by increasing the L _2, S ₁ is found to be smaller. For this reason, in the present invention, as shown in FIGS. 1 and 2, the pressing position of the push button handle 32 by the piano handle 43 is set to a position farther from the pivot position of the piano handle 43 than the pivot position of the reversing handle 31. . That is, conventionally, L ₂ was 21 mm,
In the present invention was 23mm the L _2. Therefore,
Stroke S ₁ of the piano handle 43 in the embodiment of the present invention is 0.76 × (39.5 / 23) = 1.31mm
And the stroke S _{1 of} the conventional piano handle 43
1.83 × (39.5 / 21) = 3.44 mm, it can be understood that the stroke of the piano handle 43 can be much shorter in the present invention.

FIGS. 3 to 8 are explanatory diagrams showing the switching operation of the switch of the piano handle type according to the present invention. The switching operation is the same as that of the prior art, and FIG. FIG. 4 corresponds to FIG. 31 of the conventional example, FIG. 5 corresponds to FIG. 32 of the conventional example, and FIG. 6 corresponds to FIG. 33 of the conventional example. FIG. 7 and FIG.
7 shows a state in the middle of performing the contact switching from the state of FIG. 6 to the state of FIG. The operation of the contact switching is the same as that of the conventional example described above, and thus the description thereof is omitted. FIGS. 9 to 14 are views showing the position of the slide cam 33 in each step of FIGS. 3 to 8 in the present invention. FIG. 9 corresponds to the operation of FIG. 3, and FIG. 11 corresponds to the operation of FIG. 5, FIG. 12 corresponds to the operation of FIG. 6, FIG. 13 corresponds to the operation of FIG. 7, and FIG.
Corresponding to the operation. Here, the push button handle 32 is pushed down by the pressing of the piano handle 43, and the reversing handle 31 which is inclined by the inclined inner surface of the one engaging cam body 38.
The turning handle 31 is rotated while pushing down the inclined surface of the outer surface of the engaging projection 34 located on the upper side, and this operation is the same as the conventional example already described, so the detailed description will be repeated. Omitted. And FIG.
14 to FIG. 14, when the slide cam 33 slides right or left from a position corresponding to the center position of the slide cam sliding groove 120, the spring pieces 33a, 33 on both sides.
a is elastically contacted with the side wall of the slide cam sliding groove 120 in the sliding direction, and the spring force is accumulated. Thus, the pressing of the push button handle 32 is released, the push button handle 32 is raised, and the engaging cam body 38 is raised. Is separated from the engaging projection 34, the original position (ie, FIG.
(The position shown in FIG. 12).

[0031]

As described above, according to the present invention, a return spring piece is provided on each side of the slide cam, and a pair of engaging cam bodies are protruded from the lower surface of the slide cam center between the two spring pieces. The slide cam is slidably fitted into the slide cam slide groove on the lower surface of the push button handle, and the spring pieces on both sides of the slide cam abut against both side walls of the slide cam slide groove in the sliding direction so that no external force is applied. In this state, the slide cam is positioned so that the center of the slide cam coincides with the center of the slide cam slide groove, and a pair of engaging projections corresponding to a pair of engaging cam bodies provided on the slide cam are provided on the upper part of the reversing handle that rotates in reverse. When the push button handle is depressed, the inner surface of the engaging cam body corresponding to the engaging projection hits the engaging projection located on the reversing handle that is inclined to one of the reversing rotations, and the spring piece The pair of hooking cams and the pair of hooking projections are set so that the hooking projections are pushed down while the hooking cams are slid and the reversing handle is turned in the reverse direction. The distance between the pair of engaging cams can be shortened without receiving the pair of engaging cams, so that the distance between the pair of engaging projections corresponding to the pair of engaging cams can be shortened. As a result, the vertical stroke of the reversing handle can be reduced. The operation stroke of the piano handle can be shortened, the operation stroke of the electronic switch or the like can be approximated, and the operation can be prevented from being uncomfortable.

Further, the operating stroke of the piano handle can be further shortened by setting the pressing position of the push button handle by the piano handle at a position farther from the pivot position of the piano handle than the pivot position of the reversing handle. .

[Brief description of the drawings]

FIG. 1 is an overall sectional view of a piano handle switch according to an embodiment of the present invention.

FIG. 2 is an overall sectional view when the piano handle is pressed.

FIG. 3 is an operation explanatory diagram showing a contact switching operation of the above.

FIG. 4 is an operation explanatory diagram showing a contact switching operation of the above.

FIG. 5 is an operation explanatory view showing a contact switching operation of the above.

FIG. 6 is an operation explanatory diagram showing a contact switching operation of the above.

FIG. 7 is an operation explanatory diagram showing a contact switching operation of the above.

FIG. 8 is an operation explanatory diagram showing a contact switching operation of the above.

FIG. 9 is an operation explanatory diagram showing a sliding operation of the slide cam.

FIG. 10 is an operation explanatory view showing a sliding operation of the slide cam.

FIG. 11 is an operation explanatory view showing a sliding operation of the slide cam.

FIG. 12 is an operation explanatory diagram showing a sliding operation of the slide cam in the above.

FIG. 13 is an operation explanatory diagram showing a sliding operation of the slide cam in the above.

FIG. 14 is an operation explanatory diagram showing a sliding operation of the slide cam in the above.

FIGS. 15A and 15B show a slide cam used in the above, wherein FIG. 15A is a plan view, FIG. 15B is a front sectional view, FIG. 15C is a sectional sectional view, and FIG. 15D is a side view.

FIGS. 16A and 16B show the reversing handle used in the embodiment, in which FIG. 16A is a plan view, FIG. 16B is a front view, and FIG. 16C is a side view.

17 (a) is a plan view, FIG. 17 (b) is a front view, and FIG. 17 (c) is a side view.

18A and 18B show the push button handle of the above, wherein FIG. 18A is a plan view, FIG. 18B is a front view, and FIG. 18C is a bottom view.

19A and 19B show a state in which the return spring is attached to the push button handle, FIG. 19A is a front view, and FIG. 19B is a bottom view.

FIG. 20 (a) is an explanatory view showing a stroke of the reversing handle, and FIG. 20 (b) is an explanatory view showing a stroke of the piano handle.

FIG. 21 is a sectional view of a conventional push button switch.

FIG. 22 is a sectional view of a conventional push button switch.

FIG. 23 is a partially exploded perspective view of a conventional example.

FIG. 24 is an exploded perspective view of another portion of the conventional example.

FIG. 25 is a perspective view of the mounting frame of the above.

FIGS. 26 (a) and 26 (b) are explanatory diagrams of the operation of the conventional example.

FIGS. 27 (a) and (b) are explanatory diagrams of the operation of the conventional example.

FIGS. 28A and 28B are explanatory diagrams of the operation of the conventional example.

FIGS. 29A and 29B are explanatory diagrams of an operation of a conventional example.

FIG. 30 is an explanatory diagram of a conventional example.

FIG. 31 is an explanatory diagram of a conventional example.

FIG. 32 is an explanatory diagram of a conventional example.

FIG. 33 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 Reference Signs List 5 push button switch 5b cover 24 opening / closing body 31 inversion handle 32 push button handle 33 slide cam 33a spring piece 34 engaging projection 37 return spring 38 engaging cam body 43 piano handle

Claims (2)

(57) [Claims] A push button handle for receiving a pressing force; a reversing handle for reversing the push button handle in response to a linear movement of the push button handle; and a reciprocating handle interposed between the push button handle and the reversing handle. A slide cam for converting the movement to a reversing movement of the reversing handle, a return spring for urging the push button handle in a direction opposite to the direction of the pressing operation ,
A reversing mechanism is constituted by a coil spring provided on the reversing handle, and the reversing hand is driven by the reversing mechanism.
An opening / closing body is provided for opening and closing the contacts by reversing operation via a coil spring provided on the cover, and a piano handle is provided, one end of which is supported by the cover and which pushes the push button handle of the reversing mechanism. A return spring piece is provided, and a pair of engaging cams are projected from the lower surface of the center of the slide cam between the two spring pieces, so that the slide cam can slide freely into the slide cam sliding groove on the lower surface of the push button handle. So that the spring pieces on both sides of the slide cam abut on both side walls in the sliding direction of the slide cam sliding groove so that the center of the slide cam coincides with the center of the slide cam sliding groove without applying an external force. A pair of engaging projections corresponding to a pair of engaging cam bodies provided on the slide cam are provided above the reversing handle that is positioned and reversingly rotated. The engaging projection located on the reversing handle that is inclined to one side is engaged with the inner surface of the engaging cam body corresponding to the engaging projection, and the engaging cam body is slid against the spring piece while sliding. A piano handle switch, wherein a positional relationship between a pair of engaging cam bodies and a pair of engaging projections is set such that the projections are pushed down and the reversing handle is inverted. 2. The piano handle switch according to claim 1, wherein the push position of the push button handle by the piano handle is set at a position farther from the pivot position of the piano handle than the pivot position of the reversing handle.