JPH0520965A - Switch structure - Google Patents

Abstract

PURPOSE:To provide a switch structure in which contact between contact partners by means of snap-action in addition to pressing operation is made possible, disconnection between welded contact partners can be achieved, not only assembly property becomes good, but also exchange of the pressing button is made possible and multiple kinds of pressing buttons can be used. CONSTITUTION:When an arm 20 is turned against a return spring 34 by pressing a push button 35, so that the middle part of movable piece 28 is pressed by the arm pressing part 23 of this arm, the movable piece 28 inverts its turn at a fixed turning position of the arm 20, its movable contact 29 comes in contact with a fixed contact 13a (13b) of the first terminal 13 through its snap- action. In the case of no separation of contacting partners due to mutually welded condition, a welding relief mechanism is operated by turning motion of the arm 20 due to its recovery action so that the movable piece 28 is lifted, resulting in separation of the welded contact partners is performed.

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 machines such as copy machines.

[0002]

FIG. 22 shows a conventional switch structure of this type. This switch structure has terminals 5 on the bottom of the case 50.
1, 52 fixed contacts 53a and 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. Further, 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 and 62 provided on the movable piece 56 are brought into contact with the fixed contacts 53a and 53b to bring the terminals 51 and 52 into conduction. Was there.

[0004]

However, in the above-described conventional switch structure, the movable contact 61 of the movable piece 56 can be operated only by this pressing operation of pressing the push button 54.
62 is in contact with the fixed contacts 53a and 53b, and the contact operation is performed only by the pressing of the push button 54, which is a problem as a safety switch.

Further, in the above-mentioned conventional switch structure, since the operation speed of the push button and the opening / closing speed of the contact are the same, there is a problem that welding is likely to occur.

The present invention solves the above problems, and the first 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. An object of the present invention is to provide a switch structure that is effective as a safety switch, as compared with a conventional push button that performs a contact operation only.

A second object of the present invention is to provide a switch structure in which the welded contacts are separated from each other and the function as a safety switch can be exhibited.

A third object of the present invention is to provide a switch structure in which not only the ease of assembly is improved, but also the push buttons can be replaced and a plurality of types of push buttons can be used. To do.

A fourth object of the present invention is to provide a switch structure having a double structure capable of making contact between contacts by a snap action.

[0010]

To achieve the above first object, the present invention provides a first terminal and a second terminal having fixed contacts in a housing, and a movable piece at the second terminal. A support portion and a spring piece support portion are provided, and the movable piece support portion supports the end portion of the movable piece having the movable contact, and the spring piece support portion supports the end portion of the spring piece, and the spring piece. The movable piece is held in a reversible manner by means of an arm, and an arm that rotates against the return spring when the push button is pressed down is provided in the housing. An arm holding portion that contacts the movable piece is provided in the arm. It is characterized by

In order to achieve the above-mentioned second object, the present invention provides a first terminal and a second terminal provided with fixed contacts in a housing.
A movable piece support portion and a spring piece support portion are provided on the second terminal, and the movable piece support portion supports an end portion of the movable piece provided with the movable contact, and the spring piece support portion provides a spring. An arm that supports the end of one piece and that holds the movable piece in a reversible manner with a spring piece is provided inside the housing to rotate against the return spring when the push button is pressed down. It is characterized in that an arm pressing portion that contacts the piece is provided, and that the arm is provided with a welding prevention mechanism that acts on the movable piece when returning to separate the movable contact from the fixed contact.

In order to achieve the above-mentioned third object, the present invention comprises a housing composed of a base and a case detachably attached to the base, and fixed to the base. A first terminal and a second terminal provided with a contact are provided, a movable piece support portion and a spring piece support portion are provided on the second terminal, and the movable piece support portion defines an end portion of the movable piece provided with the movable contact. Support and
The end of the spring piece is supported by the spring piece supporting portion, the movable piece is held by the spring piece in a reversible manner, and an arm having one end as a fulcrum of rotation is provided on the base. A return spring is provided between the end portion and the base, an arm holding portion that contacts the movable piece is provided on the arm, a push button is movably provided on the case, and the push button arm is provided. It is characterized by receiving an arm at the receiving part.

In order to achieve the above-mentioned fourth object, the present invention comprises a first terminal and a second terminal provided with fixed contacts, and the second terminal has a movable piece support portion and a spring piece support portion. And 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 allows the movable piece to be inverted. The held switch portion is configured, two switch portions 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.
It is characterized in that an arm holding portion which is in contact with the movable piece of each switch portion is provided.

[0014]

In the switch structure according to the first aspect of the present invention, when the push button is pushed, the return spring is resisted against the return spring.
When the arm is rotated and the intermediate portion of the movable piece is pushed in by the holding arm portion of the arm, the movable piece is inverted at a predetermined rotating position of the arm, and the movable contact of the movable piece is the first terminal. The contact action is performed by a snap action so as to contact the fixed contact of the. In this way, in addition to this push operation of pressing 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 push button that only performs contact operation. It is effective as a safety switch.

Further, in the switch structure according to the second aspect of the present invention, when the contacts are welded and are not separated from each other, the welding release mechanism is actuated by the rotation of the arm to return to lift the movable piece. , The welded contacts are separated,
It can function as a safety switch.

In the switch structure according to claim 3 of the present invention, the first terminal and the second terminal are attached to the base, and the second terminal is attached.
It is possible to assemble the switch structure by attaching the movable piece and the spring piece to the terminal and attaching the case with the push button to the base with the arm attached to the base. The switch structure is easy to assemble. Further, since the push button is assembled to the case, the push button can be replaced and a plurality of types of push buttons can be used.

Further, in the switch structure according to the fourth aspect of the present invention, it is possible to provide a switch having a double structure capable of making contact between contacts by a snap action.

[0018]

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 view of the same portion omitted, and FIG. 4 is a sectional view taken along 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 comprises a base 1 and a cover-2, which is shown in FIG.
As shown in FIG. 10, the base main body 3 has a rectangular shape in plan view, and the base main body 3 has an arm supporting portion 4 on its left side and a pair of spring receiving portions 5 on its right side. However, the socket portions 6 are formed on the outer sides of the bottoms thereof. A support shaft fitting recess 7 is formed on the upper surface of the arm support portion 4, and an arm rotating portion 8 is formed at the center of the support shaft fitting recess 7. Press-fit holes 9 and 10 are formed in the socket portion 6, and an escape groove portion 12 is provided in the upper surface portion of the base body 3. Then, in the base body 3, the leg portion 13a is press-fitted into the press-fitting hole 9 so that the first terminal 13 and the leg portion 1 is fitted into the press-fitting hole 10.
4a is press-fitted and the 2nd terminal 14 is attached, respectively, and the 1st terminal 13 and the 2nd terminal 14 are provided in each pair. That is, it is a terminal configuration of a double switch structure.

The first terminal 13 is inclined toward the upper surface of the base body and has a contact 15 at its end. Also,
The second terminal 14 includes a movable piece support portion 16 and a spring piece support portion 17.
The support pieces 16 and 17 are provided 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.

The arm 20 is provided with an arm main body 21 as shown in FIGS. 14 to 19, and the arm main body 21 is provided.
The support shaft 22, the arm pressing portion 23, the welding release arm portion 24 serving as a welding release mechanism, and the spring receiving member are hung from the base portion to the front side in a direction perpendicular to the arm body 20. And a pressing projection 26 is provided on the tip side of the arm pressing portion 23.
Is provided. The welding release arm portion 24 is at a position lower than the arm holding portion 23 by one step. In addition, the spring receiving portion 25
An engaging projection 27 is provided on the.

As shown in FIG. 20, the movable piece 28 is formed by punching out a spring plate material, and has a contact point 29 at the front end portion, a locking portion 30 at the rear end portion, and a hole portion 31 at the intermediate portion.
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 portion 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 by locking the locking portion 33 to the locking portion 17a of the spring piece 32, 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 two lines.

Further, the base 1 is provided with an arm 20 by rotatably fitting a support shaft 22 to the support shaft fitting portion 7 of the arm support portion 4 of the base 1. Two return springs 34 are provided between the spring receiving portion 25 of the frame 20 and the spring receiving portion 5 of the base 1, and the case 2 is mounted on the base 1. The support shaft retainer 18 of the case 2 presses the support shaft 22 of the arm 20. Further, a push button 35 penetrates through the push button through hole 19 of the case 2, and an arm receiving portion 37 is formed at a protruding portion 36 of the push button 35 into the case 2. The arm receiving portion 37 is formed into an arcuate surface, and the upper surface of the tip of the arm 20 is in contact with the arm receiving portion 37.

In this state, the spring force of the return spring 34 lifts the arm 20 and further pushes up the push button 35. The pressing projection 26 on the tip side of the arm pressing portion 23 of the arm 20 is in contact with the intermediate portion of the movable piece 28,
Further, the welding release arm portion 24 of the arm 20 is moved by the movable piece 28.
It is located below.

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 support shaft 22 and the intermediate portion of the movable piece 28 is pushed by the holding projection 26 on the front side of the arm holding portion 23. In this way, when the push button 35 is pushed in, the movable piece 28 is inverted when the arm 20 is almost horizontal, as shown in FIG. Contact 15 of the contact. 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. This state is T. P (total travel position), and the welding release arm portion 24 of the arm 20 is the escape groove portion 1
Inserted in 2.

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, and the movable piece 28 has its own spring force and spring piece. The spring force of 32 restores and the contacts 29, 15 are separated from each other.

When the contacts 29 and 15 are welded and are not separated from each other, the welding release arm portion 24 lifts the movable piece 28 from bottom to top by pivoting the arm 20 upward. As a result, the welded contacts 29 and 15 are separated from each other.

According to the above-described embodiment, by pushing the push button 35, the arm 20 is resisted against the return spring 34.
By rotating the arm holding portion 23 of the movable piece 28,
When the middle part of the armature 28 is pushed in, the movable pieces 28, 28 are reversed at the predetermined rotation position of the arm 20, and the movable contact point 29 of the movable piece 28, 28 contacts the fixed contacts 13a, 13b of the first terminals 13, 13. As described above, the contact action is performed by the snap action. Therefore, it is more effective as a safety switch as compared with the conventional one in which the contact operation is performed only by pressing the push button.

When the contacts are welded and cannot be separated from each other, the arm 20 is pivoted to return to actuate the welding release mechanism, and the movable piece 28 is lifted to disconnect the welded contacts. , Can function as a safety switch.

A state in which the first terminal 13 and the second terminal 16 are assembled to the base 1, the movable piece 28 and the spring piece 32 are assembled to the second terminal 16, and the arm 20 is assembled to the base 1. By attaching the case 2 having the push button 35 attached thereto to the base 1, the switch structure can be assembled, and the assemblability of the switch structure is improved. 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.

[0032]

As described above, according to the switch structure of the present invention, the first contact having the fixed contact in the housing is provided.
A terminal and a second terminal are provided, a movable piece support portion and a spring piece support portion are provided on the second terminal, and the movable piece support portion supports the end portion of the movable piece having the movable contact, and the spring piece. The support portion supports the end of the spring piece, the spring piece holds the movable piece in a reversible manner, and an arm is provided in the housing that rotates against the return spring when the push button is pressed down. Since the arm is provided with an arm holding portion that contacts the movable piece, the push button is pushed in to rotate the arm against the return spring, and the arm holding portion of the arm presses the intermediate portion of the movable piece. As you push the part in, the movable piece reverses at the arm's predetermined turning position,
The contact action is performed by a snap action so that the movable contact of the movable contact contacts the fixed contact of the first terminal.

As described above, in addition to the push operation of pushing the push button, the movable contact of the movable piece comes into contact with the fixed contact by the snap action, so that the contact operation is performed only by the conventional push button. It is more effective as a safety switch than the ones.

Further, in the switch structure of the present invention,
A first terminal and a second terminal having fixed contacts are provided in the housing, a movable piece support portion and a spring piece support portion are provided at the second terminal, and the movable piece support portion is provided with a movable contact. The end of the spring piece is supported by the spring piece supporting portion, and the movable piece is held by the spring piece so as to be reversible, and the spring is supported in the housing by depressing the push button against the return spring. A rotating arm is provided, and an arm holding portion that contacts the movable piece is provided on the arm, and a welding release mechanism that acts on the movable piece when returning to separate the movable contact from the fixed contact is provided on the arm. Since it is provided, if the contacts are welded and do not separate,
When the movable piece is rotated, the welding release mechanism works to lift the movable piece, and as a result, the welded contacts are separated from each other, and the function as a safety switch can be exerted.

Further, in the switch structure of the present invention, the housing is composed of a base and a case detachably attached to the base, and the first terminal and the first terminal provided with fixed contacts on the base. Two terminals are provided, a movable piece support portion and a spring piece support portion are provided on the second terminal, and the movable piece support portion supports the end portion of the movable piece provided with the movable contact and the spring piece support portion. The end of the spring piece is supported, and the movable piece is held by the spring piece in a reversible manner, and the base is provided with an arm whose one end serves as a fulcrum.
A return spring is provided between the end of the arm and the base, an arm holding portion that contacts the movable piece is provided on the arm, and a push button is movably provided on the case, and a push button is also provided. Since the arm was received by the arm receiving portion, the first terminal and the second terminal were assembled to the base, the movable piece and the spring piece were assembled to the second terminal, and the arm was assembled to the base. In this state, the switch structure can be assembled by attaching the case to which the push button is attached to the base, and the switch structure can be easily assembled. Further, since the push button is assembled to the case, the push button can be replaced and a plurality of types of push buttons can be used.

Further, in the switch structure of the present invention,
A first terminal and a second terminal provided with fixed contacts are provided, and a movable piece support portion and a spring piece support portion are provided on the second terminal, and the movable piece support portion is an end portion of the movable piece provided with the movable contact. A switch part in which the end of the spring piece is supported by the spring piece supporting portion and the movable piece is held by the spring piece so as to be reversible, and two switch portions are arranged side by side and housed in the housing, An arm that turns against the return spring when the push button is pressed down is provided in the housing, and an arm holding part that contacts the movable piece of each switch part is provided in the arm. It is possible to provide a switch having a double structure capable of making contact between contacts.

[Brief description of drawings]

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

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

FIG. 3 is a right side view with the same portion 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 view 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 cover.

FIG. 12 is a plan view of the same.

FIG. 13 is a cross-sectional view taken along the line 12D-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 cross-sectional view taken along the line EE of FIG.

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

FIG. 21 is a right side view of the push button.

FIG. 22 is a structural explanatory view of a conventional switch structure.

[Explanation of symbols]

1 base 2 cases 13 1st terminal 13a, 13b fixed contact 16 Second terminal 20 arm 23 Weld release arm (fusion release mechanism) 28 movable pieces 29 Moving contact 32 spring pieces

Claims (4)

[Claims] 1. A first terminal and a second terminal having fixed contacts provided in a housing, a movable piece support portion and a spring piece support portion provided at the second terminal, and the movable piece support portion provides a movable contact. While supporting the end of the movable piece equipped with, the spring piece support part supports the end of the spring piece, and the spring piece holds the movable piece in a reversible manner, and returns to the inside of the housing by pushing down the push button. A switch structure characterized in that an arm that rotates against a spring is provided, and an arm pressing portion that contacts the movable piece is provided on the arm. 2. A first terminal and a second terminal having fixed contacts provided in a housing, and a movable piece support portion and a spring piece support portion provided at the second terminal, wherein the movable piece support portion has a movable contact. While supporting the end of the movable piece equipped with, the spring piece support part supports the end of the spring piece, and the spring piece holds the movable piece in a reversible manner, and returns to the inside of the housing by pushing down the push button. An arm that rotates against the spring is provided, and an arm holding part that contacts the movable piece is provided on the arm, and the arm acts on the movable piece at the time of restoration to move the movable contact from the fixed contact. A switch structure characterized by being provided with an anti-welding mechanism for separating. 3. A housing comprising a base and a case detachably attached to the base, wherein the base is provided with a first terminal and a second terminal having fixed contacts, and A movable piece support portion and a spring piece support portion are provided at the two terminals, and the movable piece support portion supports the end portion of the movable piece provided with the movable contact.
The end of the spring piece is supported by the spring piece supporting portion, the movable piece is held by the spring piece in a reversible manner, and an arm having one end as a fulcrum of rotation is provided on the base. A return spring is provided between the end portion and the base, an arm holding portion that contacts the movable piece is provided on the arm, a push button is movably provided on the case, and the push button arm is provided. Switch structure characterized by receiving an arm at the receiving part. 4. A first terminal and a second terminal having fixed contacts are provided, a movable piece support portion and a spring piece support portion are provided at the second terminal, and the movable piece support portion is provided with a movable contact. A switch part is provided which supports the end of the movable piece, supports the end of the spring piece by the spring piece support part, and holds the movable piece in a reversible manner by the spring piece. Two switch parts are arranged side by side to form a housing. 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 holding portion that contacts the movable piece of each switch portion is provided.