JPH0594733A - Switch structure - Google Patents

Abstract

PURPOSE:To provide a safety switch capable of carrying out three kinds of switch operations collectively by arranging three switches inside a housing, and bringing movable pieces of the switches into contact with fixed contacts by a snap action. CONSTITUTION:Upon pushing in a pushbutton 35, an arm 20 is turned on an arm support shaft 22 against a return spring 34, and the intermediate portion of a movable piece 28 is pressed by three pressing projections 26 formed in an arm pressing portion 23. As the pushbutton 35 is pushed further, the movable piece 28 is reversed by a snap action when the arm 20 is turned in the approximately horizontal direction so that a movable contact 29 is brought into contact with a fixed contact 15 of a first terminal 13. When the pushbutton 35 is pressed further, the movable piece 28 is pressed by the pressing projections 26 to be thus curved downward. When force pressing the pushbutton 35 is released, the arm 20 is lifted by restoring force of a spring 34 so that the pressing of the movable piece 28 is released. Accordingly, the movable piece 28 is returned by its own restoring force and the restoring force of the spring 32, thereby separating the contacts 29, 15 from each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety switch structure used for office equipment such as copy machines.

[0002]

2. Description of the Related Art A conventional switch structure of this type is shown in FIG. This switch structure has terminals 5 on the bottom of the case 50.
1, 52 fixed contacts 53a, 53b are arranged, and a push button 54 is movably provided. A movable piece receiving portion 55 is provided on the push button 54, and a movable piece 56 is placed on the movable piece receiving portion 55.
6 is pressed against the movable piece receiving portion 55 by a spring 57. Also, return springs 59 and 60 are interposed between the lower portion of the push button 54 and the bottom portion of the case 50.

By depressing the push button 54, the movable piece 56 is lowered, and the movable contacts 61, 62 provided on the movable piece 56 are brought into contact with the fixed contacts 53a, 53b to bring the terminals 51, 52 into conduction. Was there.

[0004]

However, in the above-mentioned conventional switch structure, the movable contact 61 of the movable piece 56 can be operated only by this pressing operation of the push button 54.
62 is in contact with the fixed contacts 53a and 53b, the contact operation is performed only by the push of the push button 54, there is a problem as a safety switch, and there are two types of switches separately for the DC switch and the AC switch. There was a problem that the switch had to be used.

The present invention has been made in view of the above problems, and an object of the present invention is to enable contact between contacts by a snap action in addition to the pushing operation of pushing a push button, Compared to the conventional push-button push-button contact operation, it is effective as a safety switch and has a triple structure that allows three types of switch operation to be performed at once with a single snap action. It is to provide a switch structure.

[0006]

In order to achieve the above object, a switch structure of the present invention is provided with a first terminal and a second terminal having fixed contacts provided in a housing, and a movable piece supporting portion is provided at the second terminal. And a spring piece support portion, the movable piece support portion supports an end portion of the movable piece having a movable contact, the spring piece support portion supports an end portion of the spring piece, and the spring piece supports the movable piece. Is configured to be reversible, and three switch parts are arranged side by side and housed in the housing.
It is characterized in that an arm that pivots against a return spring when the push button is pressed down is provided, and that the arm is provided with an arm pressing portion that contacts the movable piece of each switch portion.

[0007]

In the switch structure of the present invention constructed as described above, by pushing the push button, the arm is rotated against the return spring, and the holding arm portion pushes the intermediate portion of the movable piece. Then, the movable piece is reversed at a predetermined rotation position of the arm, and a contact action is performed by a snap action so that the movable contact of the arm comes into contact with the fixed contact of the first terminal. In this way, in addition to this push operation that pushes the push button, the movable contact of the movable piece comes into contact with the fixed contact by the snap action, so compared to the conventional one in which the contact operation was performed only by pressing the push button. Thus, it is possible to provide a switch having a triple structure that is effective as a safety switch and that can perform three kinds of switch operations collectively by one snap action.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 is a plan view of the switch structure according to the present invention with a part thereof omitted, FIG. 2 is a longitudinal sectional view of the same, FIG. 3 is a right side sectional view of the same portion omitted, and FIG. 4 is a sectional view taken along the line AA of FIG. 5 is shown in FIG. 2B-
It is sectional drawing which follows the B line. The switch structure of the present invention includes a base 1 and a case 2, which is shown in FIG.
As shown in FIG. 10, it has a base main body 3 having a rectangular shape in plan view. The base main body 3 has an arm support portion 4 on the left side thereof, a pair of spring receiving portions 5 on the right side thereof, and a bottom portion thereof. Socket portions 6 are formed on the outer sides, respectively. A support shaft fitting concave portion 7 is formed on the upper surface of the arm supporting portion 4, and two arm rotating portions 8 are formed at an intermediate portion of the support shaft fitting concave portion 7. The socket portion 6 has press-fitting holes 9, 1
0 is formed, and the relief groove 1 is formed on the upper surface of the base body 3.
2 is provided. The base body 3 has a press-fitting hole 9
The leg portion 13a is press-fitted into the first terminal 13 and the leg portion 14a is press-fitted into the press-fitting hole 10 and the second terminal 14 is attached to the press-fitting hole 10. is there. That is, it is a terminal configuration of a triple switch structure.

The first terminal 13 is inclined toward the upper surface of the base body, and a fixed contact 15 is provided at the end thereof. Further, the second terminal 14 has a movable piece support portion 16 and a spring piece support portion 17, and the support portions 16 and 17 are formed with locking portions 16a and 17a.

The case 2 has a support shaft retainer 1 on the left side inside thereof.
8 and a push button through hole 19 is provided on the right side of the upper surface.

As shown in FIGS. 14 to 19, the arm 20 is provided with two arm bodies 21 in parallel.
The arm body 21 of the book is hung from the base portion to the front side, and is supported at a right angle to the arm body 21, a support shaft 22, an arm pressing portion 23, and a welding release arm portion 24 that is a welding release mechanism.
And a spring receiving portion 25, and the arm pressing portion 23 is provided with three pressing protrusions 26. The welding release arm portion 24 is located at a position lower than the arm holding portion 23 by one step. An engagement projection 27 is provided on the tip side of the spring receiving portion 25.

As shown in FIG. 20, the movable piece 28 is formed by punching out a spring plate material, and has a movable contact 29 at the front end portion, a locking portion 30 at the rear end portion, and a hole portion at the intermediate portion. 31 are provided respectively.

A movable piece 28 and a spring piece 32 are attached to the second terminal 14 of the base 1. That is, the movable piece support portion 16 of the second terminal 14 is attached with the movable piece 28 by engaging the engagement portion 30 with the engagement portion 16a, and the spring piece support portion 17 is provided with the movable piece 28. The spring piece 32 is attached to the locking portion 17a of the movable piece 28 by locking the locking portion 33, and the tip of the spring piece 32 is hooked on the front edge of the hole 31 of the movable piece 28 in a curved state. is there. Therefore, the movable piece 28 is biased upward by the spring force of the spring piece 32. The movable piece 28 extends in three lines.

Further, the base 1 is provided with an arm 20 by rotatably fitting the arm support shaft 22 to the support shaft fitting portion 7 of the arm support portion 4, and the spring receiving portion of the arm 20. 25, two return springs 34 are interposed between the spring receiving portion 5 of the base 1 and the case 2 mounted on the base 1. Arm 2
The zero arm support shaft 22 is being held. Also, case 2
A push button 35 penetrates through the push button through hole 19 of the push button 35.
6, an arm receiving portion 37 is formed, and this arm receiving portion 37 is formed in an arcuate surface, and the upper surface portion of the tip end portion of the arm 20 is in contact with this arm receiving portion 37.

In this state, the spring force of the return spring 34 raises the arm 20 and further pushes up the push button 35. The three holding projections 26 on the arm holding portion 23 of the arm 20 are in contact with the intermediate portions of the respective movable pieces 28, and the welding release arm portion 2 of the arm 20 is also attached.
4 is located below the movable piece 28.

Next, the operation will be described. The state of FIG. 2 is the state before the operation. By pushing the push button 35 from the state before the operation, the arm 20 is resisted against the return spring 34.
Is rotated about the arm support shaft 22, and the intermediate portion of the movable piece 28 is pushed by the three holding projections 26 on the arm holding portion 23 of the arm holding shaft 22. In this manner, when the push button 35 is pushed in, the movable piece 28 is inverted when the arm 20 becomes substantially horizontal as shown in FIG. 6, and the movable contact 29 of the movable piece 28 is connected to the first terminal 13. It contacts the fixed contact 15. This contact action is a snap action. Further, by pushing the push button 35, the movable piece 28 is pushed by the holding projection 26 and is bent downward as shown in FIG. 7. This state is T. P (total travel position), and the welding release arm portion 24 of the arm 20.
Is inserted into the escape groove 12.

When the pressing force on the push button 35 is released, the arm 20 is lifted by the restoring force of the return spring 34 and the pressing force of the movable piece 28 is released, so that the movable piece 28 restores its own force and the spring piece 32. The contacts 29 and 15 are separated from each other by returning by the restoring force.

When the contacts 29 and 15 are welded and do not separate from each other, the welding release arm portion 24 lifts the movable piece 28 from the bottom to the top by pivoting the arm 20 in the upward direction, so that the welding is performed. The contacts 29, 15 are separated from each other.

According to the above-mentioned embodiment, by pushing the push button 35, the arm 20 is resisted against the return spring 34.
When the arm is pressed and the middle part of the movable piece 28 is pushed in by the arm pressing portion 23, the movable piece 28 is inverted at a predetermined rotation position of the arm 20, and the movable contact 29 of the movable piece 28 is turned to the first terminal. A contact operation is performed by a snap action so as to contact the fixed contact 15 of 13. Therefore, as compared with a conventional push-button push-button contacting operation, it is more effective as a safety switch, and when the contacts are welded together and do not separate, the arm 20 rotates to return. As a result, the welding release mechanism is activated and the movable piece 28 is lifted, so that the welded contacts are separated from each other, the first terminal 13 and the second terminal 14 are attached to the base 1, and the movable piece 28 and the second terminal 14 are assembled. With the spring piece 32 attached and the arm 20 attached to the base 1, the push button 35
By attaching the case 2 assembled with to the base 1,
The switch structure can be assembled, and the switch structure can be easily assembled. Further, since the push button 35 is assembled to the case 2, the push button 35 can be exchanged and a plurality of types of push buttons can be used.

The switch structure of the present invention is, for example, 3
If one of the two is an AC switch and one is a DC switch, you can use 3 in one snap action.
Since it has a triple switch structure capable of collectively performing various kinds of switch operations, it can exhibit its function as a safety switch.

FIG. 22 is a vertical cross-sectional view showing another embodiment of the present invention, and the part particularly different from the switch structure of the above embodiment is the return spring part.

A base 1 and a case 2 are provided. The base 1 has a base body 3 having a rectangular shape in plan view as shown in FIGS. 23 to 25. The base body 3 has an arm on the left side thereof. A support portion 4 and a socket portion 6 are formed outside the bottom portion of the support portion 4, respectively. A support shaft fitting concave portion 7 is formed on the upper surface of the arm supporting portion 4, and two arm rotating portions 8 are formed at an intermediate portion of the support shaft fitting concave portion 7. Further, a leaf spring fitting hole 41 for fitting and crimping the leaf spring 40 is provided in the leftward direction of the base body 3 inside the support shaft fitting recessed portion 7. Further, press-fitting holes 9 and 10 are formed in the socket portion 6, and an escape groove 12 is provided in the upper surface portion of the base body 3. Then, the leg portion 13a is press-fitted into the press-fitting hole 9 in the base body 3 so that the first terminal 13 is
The leg portions 14a are press-fitted into the press-fitting holes 10 to attach the second terminals 14 respectively, and the first terminals 13 and the second terminals 14 are respectively provided in parallel in three pieces. That is, it is a terminal configuration of a triple switch structure.

The first terminal 13 is inclined toward the upper surface of the base body 3 and has a contact 15 at its end. Further, the second terminal 14 has a movable piece support portion 16 and a spring piece support portion 17, and the support portions 16 and 17 are formed with locking portions 16a and 17a.

The case 2 has a support shaft retainer 1 on the inner left side thereof.
8 and a push button through hole 19 is provided on the right side of the upper surface.

As shown in FIGS. 26 to 31, the arm 20 is provided with two arm bodies 21 in parallel.
The arm main body 21 of the book is hung from the base of the arm main body 21 to the front side, and is perpendicular to the arm main body 21. The arm support shaft 22, the arm pressing portion 23, the welding release arm portion 24 serving as a welding release mechanism, and the push button. The receiving portion 25 is provided, and the arm holding portion 23 is provided with three holding projections 26. Also,
The welding release arm portion 24 is at a position lower than the arm pressing portion 23 by one step. In addition, the arm body 21 of the arm support shaft 22
An L-shaped spring support portion 4 extending outward at a right angle from the position connected to the arm support shaft 22 and in parallel with the arm support shaft 22.
Forming 2.

As shown in FIG. 20, the movable piece 28 is formed by punching out a spring plate material, has a movable contact 29 at the front end portion, a locking portion 30 at the rear end portion, and a hole portion at the intermediate portion. 31 are provided respectively.

A movable piece 28 and a spring piece 32 are attached to the second terminal 14 of the base 1. That is, the movable piece support portion 16 of the second terminal 14 is attached with the movable piece 28 by engaging the engagement portion 30 with the engagement portion 16a, and the spring piece support portion 17 is provided with the movable piece 28. The spring piece 32 is attached to the locking portion 17a of the movable piece 28 by locking the locking portion 33, and the tip of the spring piece 32 is hooked on the front edge of the hole 31 of the movable piece 28 in a curved state. is there. Therefore, the movable piece 28 is biased upward by the spring force of the spring piece 32. The movable piece 28 extends in three lines.

In the base 1, the one end portion 40a of the leaf spring 40 is fitted into the leaf spring fitting hole 41 in the support shaft fitting concave portion 7 of the arm support portion 4, and then the support shaft fitting concave portion 7 is inserted. The arm 20 is provided on the base 1 by rotatably fitting the arm support shaft 22 to the base 1. At this time, the other end 40b of the leaf spring 40 is provided so as to warp the spring support portion 42 of the arm 20 to form a return spring mechanism. A case 2 is attached to the base 1, and a support shaft retainer 43 of the case 2 holds the arm support shaft 22 of the arm 20. Further, a push button 35 penetrates the push button through hole 19 of the case 2, and an arm receiving portion 37 is formed in a protruding portion 36 of the push button 35 into the case 2. The reference numeral 37 designates an arc surface, and the arm receiving portion 37 is provided with an arm 20.
The push button receiving portion 25 at the tip end of is in contact.

In this state, the spring force of the leaf spring 40, which is the return spring mechanism, raises the arm 20 and further pushes up the push button 35. The three pressing projections 26 on the arm pressing portion 23 of the arm 20 are in contact with the intermediate portions of the respective movable pieces 28, and the welding release arm portion 24 of the arm 20 is located below the movable piece 28. There is.

Next, the operation will be described. The state of FIG. 22 is the state before the operation. From the state before this operation, push button 35
By pushing the arm 20 against the leaf spring 40.
Is rotated about the arm support shaft 22, and the intermediate portion of the movable piece 28 is pushed by the three holding projections 26 on the arm holding portion 23 of the arm holding shaft 22. In this way, when the push button 35 is pushed in, the movable piece 28 is inverted when the arm 20 becomes substantially horizontal, and the movable contact 29 of the movable piece 28 contacts the fixed contact 15 of the first terminal 13. .. This contact action is a snap action. Further, when the push button 35 is pressed, the movable piece 28 is pressed by the pressing projection 26 and is bent downward. This state is T. P
(Total travel position), and the welding release arm portion 24 of the arm 20 is inserted into the escape groove portion 12.

When the pressing force applied to the push button 35 is released, the arm 20 is lifted by the restoring force of the leaf spring 40 and the pressing force of the movable piece 28 is released, and the moving piece 28 retains its own restoring force and the spring piece 32. The contacts 29 and 15 are separated from each other by returning by the restoring force.

The other embodiment configured as described above can achieve the same effect as that of the above embodiment.

[0033]

As described above, in the switch structure of the present invention, the first terminal and the second terminal provided with the fixed contacts are provided, and the second terminal has the movable piece supporting portion and the spring piece supporting portion. Is provided, the movable piece support portion supports the end portion of the movable piece having the movable contact, the spring piece support portion supports the end portion of the spring piece, and the spring piece holds the movable piece in a reversible manner. The switch part is configured and three switch parts are arranged side by side and accommodated in the housing, and an arm that rotates against the return spring by pushing down the push button is provided in the housing.
Since the arm retainer contacting the movable piece of each switch is provided, the three switches can be recombined in various ways for direct current or alternating current, and the three switch operations can be collectively performed with one snap action. It can be carried out.

[Brief description of drawings]

FIG. 1 is a plan view in which a part of a switch structure according to the present invention is omitted.

FIG. 2 is a vertical sectional view of the same.

FIG. 3 is a right side sectional view in which the same portion is omitted.

FIG. 4 is a sectional view taken along the line AA of FIG.

FIG. 5 is a cross-sectional view taken along the line BB of FIG.

FIG. 6 is an explanatory diagram of a movable piece inversion state in the switch structure according to the present invention.

FIG. 7: T. It is explanatory drawing of P state.

FIG. 8 is a plan view of the base.

FIG. 9 is a left side view of the same.

FIG. 10 is a cross-sectional view taken along the line CC of FIG.

FIG. 11 is a side view of the case.

FIG. 12 is a plan view of the same.

FIG. 13 is a sectional view taken along the line D-D of FIG.

FIG. 14 is a side view of the arm.

FIG. 15 is a plan view of the same.

FIG. 16 is a bottom view of the same.

FIG. 17 is a left side view of the same.

FIG. 18 is a right side view of the same.

FIG. 19 is a sectional view taken along the line E-E of FIG.

FIG. 20 is a plan view of a movable piece.

FIG. 21 is a front view of a push button.

FIG. 22 is a vertical cross-sectional view showing another embodiment of the switch structure of the present invention.

FIG. 23 is a cross-sectional view taken along the line F-F of FIG.

FIG. 24 is a plan view of the base.

FIG. 25 is a left side view of the same.

FIG. 26 is a side view of the arm.

FIG. 27 is a plan view of the same.

FIG. 28 is a bottom view of the same.

FIG. 29 is a left side view of the same.

FIG. 30 is a right side view of the same.

FIG. 31 is a cross-sectional view taken along the line G-G of FIG.

FIG. 32 is a structural explanatory view of a conventional switch structure.

[Explanation of symbols]

 1 Base 2 Case 13 First Terminal 14 Second Terminal 15 Fixed Contact 16 Movable Piece Supporting Part 17 Spring Piece Supporting Part 20 Arm 23 Arm Pressing Part 28 Movable Piece 29 Movable Contact 32 Spring Piece 35 Push Button

Claims (1)

[Claims] 1. A movable device comprising a first terminal and a second terminal provided with fixed contacts, a movable piece support portion and a spring piece support portion provided on the second terminal, and a movable contact provided on the movable piece support portion. A switch part is provided which supports the end part of one piece, supports the end part of the spring piece by the spring piece support part, and holds the movable piece in a reversible manner by the spring piece. Three switch parts are arranged side by side in the housing. And an arm that rotates against the return spring when the push button is pressed down is provided in the housing.
A switch structure characterized in that an arm pressing portion that comes into contact with a movable piece of each switch portion is provided.