JPH0328004B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to the structure of a so-called push-on, push-off type switch.

[Prior Art] In the conventional structure of this type of switch, as shown in FIGS. 1 and 2, when the handle 6' is operated to turn from on to off (or from off to on), the contact pressure is The released compression spring 40 was further compressed to invert the handle 6'. Reference numerals 41 in FIG. 1 indicate contact points.

[Problems to be Solved by the Invention] However, if the spring constant is increased to make the spring stronger in order to increase the contact pressure, the force for compressing the compression spring 40 must also be increased, and the force required for reversal (i.e., operating load) The problem was that it became stronger. Furthermore, when the contacts are welded together, the spring force is used to separate the contacts, which poses a problem in that it is difficult to separate the welded contacts.

The present invention was made in view of these problems, and its purpose is to reduce the operating load while obtaining high contact pressure without lowering the contact pressure, and to prevent the contacts from welding. It is an object of the present invention to provide a switch structure that can reliably separate the contacts when necessary.

[Means for Solving the Problems] The structure of the switch of the present invention is such that a rod insertion hole 4 and a pin insertion hole 5 are provided on the upper surface of the case 1, and a rod is inserted into the rod insertion hole 5 and hangs from the lower surface of the handle 6. A stopper part 8 is provided at the lower end of the rod 7 to prevent the rod 7 from coming off the upper surface of the case 1 by inserting the rod 7 so that the rod 7 can move vertically.
A coil spring 9 is inserted between the handle 6 and the handle 6.
The pin 1 is rotatable with respect to the handle 6 from the bottom side of the handle 6.
0 and insert the lower end of the pin 10 into the pin insertion hole 5, and insert the first terminal 18 and the second terminal 1 into the case 1.
9 are provided vertically facing each other, and the first terminal 18 and the second terminal
A common terminal 2 has a common contact 22a facing between it and the terminal 19, and the other end of a switch 22 equipped with this common contact 22a for switching contacts is attached to the case 1.
0, the pendulum 24 is rotatably supported in the case 1 around a substantially horizontal axis 25, and the pendulum 24 and the switch 22 are maintained in their respective inversion switching positions. The pendulum 2 is connected by a tension spring 28 of
Protrusions 3 are vertically opposed to the pivot side ends of 4.
5 and 35 are protruded, and the switch 22 is positioned between the protrusions 35 and 35, and the upper or lower protrusion 35 is set to push the switch 22 apart when the contacts are welded when switching the contacts. When the handle 6 is not pressed, the lower end of the pin 5 is set to face the pivot part of the pendulum 24, and a W-shape is formed on the upper edge of the pivot side of the pendulum 24, which is pushed by the lower end of the pin 6 when the handle 6 is pushed down. With one end of the switch 22 in pressure contact with the first terminal 18 due to the spring force of the tension spring 28, the lower end of the pin 5 in the non-depressed state is at the center of the W-shaped edge 32. The pin is in a non-depressed state with the other end of the switch 22 facing above one inclined surface 30 of the chevron-shaped recess 29 and in pressure contact with the second terminal 19 by the spring force of the tension spring 28. The lower end of 5 is the chevron-shaped convex part 2
9 and facing above the other inclined surface 31.

[Function] The pendulum 24 is pressed by the pin 5 of the handle 6, and the pendulum 24 is reversely switched by the tension spring 28, and the contact is switched by such reverse switching of the pendulum 24, and the operating force is reduced. The contact pressure is made to be sufficiently high. Further, when the contacts are welded, the protrusion 35 formed on the pendulum 24 forcibly drives the switch 24 to reliably separate the welded contacts.

[Examples] Examples of the present invention will be described in detail below based on the drawings.

In the figure, reference numeral 1 denotes a case, which is composed of a box-shaped body 2 with an open top and a cover 3 attached to the top opening of the body 2. The cover 3, which is the top of the case 1, has a rod insertion hole. 4 and a pin insertion hole 5 are formed. Reference numeral 6 in the figure is a handle, and a rod 7 is vertically disposed from the lower surface of the handle 6. The rod 7 penetrates the rod insertion hole 4 so as to be vertically movable, and the lower end of the rod insertion hole 4 A stopper part 8 is provided to prevent the rod 7 from coming off above the cover 3. In the illustrated embodiment, the stopper part 8 is an E-ring attached to the lower end of the rod 7. A coil spring 9 is interposed between the cover 3 and the handle 6, and a spring force is applied to push the handle 6 upward. A pin 10 that is rotatable with respect to the handle 6 is suspended from the lower surface of the handle 6, and the lower end of the pin 10 is inserted into the pin insertion hole 4. In the embodiment shown in FIGS. 5 to 7, the upper part of the pin 10 is supported by a shaft 11 on the handle 6, and the upper surface of the pin 10 is pressed by a leaf spring 12. In the embodiment shown in FIG. 5, the leaf spring 12
One end is bent into an L shape to form an L-shaped bent piece 13, and this L-shaped bent piece 13 is fixed to the lower surface of the handle 6 by a fixing member 14, and the other end of the leaf spring 12 is attached to the handle 6.
It is locked in a locking recess 15 provided in. Also the 6th
In the embodiment shown in the figure, the leaf spring 12 has a substantially inverted M shape and is interposed between the upper surface of the pin 10 and the lower surface of the handle 6. In this case, both leg pieces 1 of the leaf spring 12
6 is in contact with the bottom surface of the handle 6, so the leaf spring 12
Even if the pin 10 is not fixed as shown in FIG. 6b, the leaf spring 12 will not come off even if the pin 10 is tilted as shown in FIG. Further, when the leaf spring 12 cannot be provided in the left-right direction as shown in FIG. 7, it may be provided in the front-rear direction. 8 to 10 show another example in which the pin 10 is rotatable with respect to the handle 6. In this embodiment, a pin fitting recess 39 with a downward opening is provided on the lower surface of the handle 6, and a flange-shaped upper surface portion of the upper end of the pin 10 is fitted into this pin fitting recess 39, and the pin 10 is connected to the coil. A spring material 17 made of a spring is fitted, the upper end of the spring material 17 is in elastic contact with the brim-like part of the upper end of the pin 10, and the lower end of the spring material 17 is in elastic contact with the cover 3.
0 is attached only by fitting into the pin fitting recess 39. In this case, in the case shown in FIG. 8, one end of the upper surface of the pin 10 serves as a fulcrum, and the pin 10 rotates relative to the handle 6. Also the 9th
As shown in the figure, when a fulcrum projection 37 is provided in the center of the pin fitting recess 39, this fulcrum projection 3
7 is the fulcrum. The fulcrum projection 37 has a triangular prism shape, a semi-cylindrical shape, a hemispherical shape, etc. as shown in FIG. Fifth
Although the embodiment shown in FIGS. 7 to 7 is easier to assemble than the embodiment shown in FIGS. 8 to 10, a space is required for interposing the leaf spring 12 between the pin 10 and the handle 6. On the other hand, Figures 8 to 10
Although the embodiment shown in the figure is more difficult to assemble than the embodiments shown in FIGS. 5 to 7, it requires more space to accommodate the leaf spring 12 (that is, the space required for the rotation of the pin is smaller). Inside the body 2, a first terminal 18 and a second terminal 19 are arranged vertically facing each other. Further, a common terminal 20 is disposed within the body 2, and a locked portion 23 at the other end of the switch 22 is rotatably supported on a locking portion 21 of the common terminal 20. One end of the terminal 22 (that is, the end opposite to the pivoted portion) is located between the first terminal 18 and the second terminal 19, which are vertically opposed, and includes a common contact 22a. A pendulum 24 is further arranged inside the body 2.
One end thereof is rotatably supported on the body 2 by a shaft 25. A hook portion 26 is provided at the other end of the pendulum 24, and both ends of a tension spring 28 are attached to this hook portion 26 and a hook hole 27 of the switch 22. A W-shaped edge 32 is formed on the upper edge of the pivot side of the pendulum 24 and is pushed by the lower end of the pin 10 when the handle 6 is pushed down. Here, when the handle 6 is not pressed (that is, the handle 6 is pushed upward by the coil spring 9), the lower end of the pin 10 is set to face the shaft 25 on which the pendulum 24 is pivoted. , when one end of the switch 22 is in pressure contact with the first terminal 18 due to the spring force of the tension spring 28, the lower end of the pin 10 in the non-depressed state is W.
The other end of the switch 22 faces above one inclined surface 30 of the chevron-shaped protrusion 29 at the center of the letter-shaped edge 32 and is pressed against the second terminal 19 by the spring force of the tension spring 28. The lower end of the pin 10 in the non-depressed state is set to face the other inclined surface 31 of the chevron-shaped convex portion 29. Therefore, when the switch 22 is in pressure contact with the first terminal 18 by the tension spring 28 as shown in FIG. 12a, the pin 10 faces one inclined surface 30 as shown in FIG. 11a. In this state, when the handle 6 is pushed down against the spring force of the coil spring 9, the lower end of the pin 10 hits one of the inclined surfaces 30, and the handle 6
When you press down, the lower end of the pin 10 moves to one inclined surface 30.
The lower end of the pin 10 pushes the first pressing surface 33 of the W-shaped edge 32 to rotate the pendulum 24 counterclockwise. As soon as the tension spring 28 is located below the pivot point between the switch 22 and the common terminal 20, the tension spring 28 closes the switch 2.
2 is reversed, the switch 22 suddenly separates from the first terminal 18 and comes into elastic contact with the second terminal 19, and the spring force of the tension spring 28 causes the switch 22 to move to the second terminal 19 as shown in FIG. 12b. The state of elastic contact with the second terminal 19 is maintained. When the pressure on the handle 6 is released in this state, the handle 6 is pushed upward by the coil spring 9 as shown in FIG.
It faces the other inclined surface 30 of. Next, when switching the contacts, when the handle 6 is pressed, the lower end of the pin 10 hits the other inclined surface 31, and when the handle 6 is further pressed, the lower end of the pin 10 rotates counterclockwise, and the lower end of the pin 10 is rotated counterclockwise. W-shaped edge 32 by
The pendulum 22 is rotated clockwise by pressing the second pressing surface 34 as shown in FIG. Opener 22 by 28
The pulling direction of the switch is reversed, and the switch 22 suddenly moves to the second position.
The switch 22 is separated from the terminal 19 and comes into elastic contact with the first terminal 18, and the state in which the switch 22 is in elastic contact with the first terminal 18 is maintained by the spring force of the tension spring 28 as shown in FIG. 12a. When the pressure on the handle 6 is released in this state, the lower end of the pin 10 will again face one of the inclined surfaces 30 as shown in FIG. 11a.

As shown in FIG. 13, protrusions 35 are provided on the pendulum 24 so as to face each other vertically, and the switch 22 is positioned between the protrusions 35 so that it can be moved up or down by the rotation of the pendulum 22 during the contact switching time. The protrusion 35 is used to push the switch 22, and the welded contacts are not pulled by the tension spring 28 when opening and closing, but the protrusion 35
This allows the switch 22 to be forcibly removed. If the switch 22 is not welded, the protrusion 35 will not come into contact with the switch 22, and therefore the operating load will not increase. In FIG. 3, numeral 36 indicates the upper and lower abutting parts. 38 in FIG. 4 is an assembly frame.

[Effects of the Invention] In the present invention, as described above, when the handle is pressed down, the pin rotatably hanging from the handle pushes the W-shaped edge to rotate the pendulum and switch the contact points. Even if the tension spring force is large, the contact can be switched by rotating the pendulum with a small pressing force on the handle.As a result, the operating load on the handle can be reduced without reducing the contact pressure, and the pivot side of the pendulum can be Protrusions are provided on the ends facing each other up and down, and a switch is placed between these protrusions, and when the contacts are switched, the welded contacts are set so that the upper or lower protrusions push the switch and separate them. Therefore, when the contacts are welded, there is an advantage that the protrusion formed on the pendulum can forcefully drive the switch to reliably separate the welded contacts.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the conventional example, Fig. 2 a and b are explanatory diagrams explaining the operation of the conventional example, Fig. 3 is a cross-sectional view of the present invention, Fig. 4 is an exploded perspective view of the same, and Fig. 5 a,
b and c are a schematic cross-sectional view of the handle when not pressed, showing an example of how the same pin is installed; a schematic cross-sectional view of the handle when the pin presses one inclined surface; and when the handle is pressed, the pin presses the other side. Schematic cross-sectional view of the state in which the inclined surface of is pressed, Fig. 6a,
b and c are a schematic cross-sectional view of another embodiment of the above leaf spring in an installed state, a schematic cross-sectional view when the handle is pressed, and a perspective view of the leaf spring, and Figures 7a and b are still another embodiment of the same as above. Schematic sectional view and schematic perspective view of FIG. 8a,
b and c are a schematic sectional view of the handle of another embodiment showing an example of mounting the same pin when not pressed, a schematic sectional view of the pin rotating clockwise when the handle is pressed, and a schematic sectional view when the handle is pressed. Schematic sectional view of the pin rotating counterclockwise, Figure 9a,
b and c are a schematic cross-sectional view of the handle of still another embodiment of the same as above when not pressed, a schematic cross-sectional view of the pin rotating clockwise when the handle is pressed, and a pin rotating counterclockwise when the handle is pressed. 10a, b, c are perspective views showing examples of fulcrum protrusions; FIGS. 11a, b, c,
d is an explanatory diagram showing the order of handle operation, and Figures 12a and b are the states of the contacts in Figure 11a and the first
1 Explanatory diagram of the state of the contacts in the state of Fig. 1 b, 1st
3 is a schematic perspective view of the pendulum of the present invention, in which 1 is a case, 4 is a rod insertion hole, 5 is a pin insertion hole, 6 is a handle, 7 is a rod, 8 is a stopper portion, and 9 is a coil spring. , 10 is the pin, 18 is the first terminal,
19 is a common terminal, 22 is a switch, 24 is a pendulum, 2
8 is a tension spring, 29 is a chevron-shaped convex portion, 30 is one inclined surface, 31 is the other inclined surface, 32 is a W-shaped edge, 22a is a common contact, and 35 is a protrusion.

Claims (1)

[Claims] 1. A rod insertion hole and a pin insertion hole are provided in the upper surface of the case, and a rod hanging from the lower surface of the handle is inserted into the rod insertion hole so as to be movable up and down, and the rod is inserted into the lower end of the rod. A stopper part is provided to prevent the rod from coming off the top of the case, and a spring force is applied between the top of the case and the handle to push the handle upward through a coil spring, and the bottom of the handle is hang a rotatable pin from the handle, insert the lower end of the pin into the pin insertion hole, and insert the first
A terminal and a second terminal are provided facing each other vertically, a common contact is made to face between the first and second terminals, and the other end of a switch for switching contacts with this common contact is placed in a case. The pendulum is rotatably supported on the attached common terminal, the pendulum is rotatably supported in the case around an axis in a substantially horizontal direction, and the pendulum and the switch are pulled to maintain their respective reverse switching positions. They are connected by a spring, and protrusions are provided on the end of the pendulum on the pivot side, facing upward and downward, respectively, and a switch is positioned between these protrusions, and when the contacts are switched, the welded contacts are removed from above or below. The protrusion of the handle is set to push the open/close member apart, and when the handle is not pressed, set the pin so that the lower end of the pin faces the pivot part of the pendulum. A W-shaped edge is formed that is pushed by the lower end, and when one end of the switch is in pressure contact with the first terminal due to the spring force of the tension spring, the lower end of the pin that is not pressed down is at the center of the W-shaped edge. The lower end of the pin in the non-depressed state is facing above one inclined surface of the chevron-shaped convex part, and the other end of the switch is in pressure contact with the second terminal by the spring force of the tension spring. The structure of the switch is characterized in that the mold convex portion is formed oppositely above the other inclined surface. 2 Rotatably support the upper part of the pin on the handle,
The structure of the switch according to claim 1, characterized in that the switch is pressed by a leaf spring on the upper surface of the pin. 3 Form a pin fitting recess with a downward opening on the lower surface side of the handle, and rotatably fit the upper end of the pin pushed upward by the spring material into the pin fitting recess into the pin fitting recess. The structure of the switch according to claim 1, characterized in that the pin is supported on the handle only by fitting the pin into the handle.