JP3444062B2 - Push button 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 push button switch that gives a click feeling to an operator by closing a contact when a handle is pressed.

[0002]

2. Description of the Related Art Conventionally, when a movable contact comes into contact with a fixed contact, a push button switch which has a click feeling so that an operator can sense this state is inverted by being depressed by a handle using a disc spring. I try to give a click feeling when I do.

Hereinafter, a conventional push button switch will be described with reference to FIGS.
Will be explained. FIG. 7 is an exploded perspective view of the push button switch. 8 to 10 are cross-sectional views of the main part of the push button switch, FIG. 8 is a cross-sectional view of the main part when the handle is not pressed, and FIG. 9 is a cross-sectional view of the main part of the process in which the handle is pressed. 10 is a cross-sectional view of an essential part when the handle is completely pressed.

In FIG. 7, the outer shell of the push button switch comprises a cover 1 and a body 2. The cover 1 is a box with an open bottom, and an opening 1a for exposing the handle 3 is provided on the top.

One end of the handle 3 is pivotally supported by the cover 1, and the other free end is exposed from the cover 1 and is pressed by the operator. A disc spring accommodating portion 3a is provided on the bottom surface portion of the handle 3 extending from the approximate center in the longitudinal direction to the free end.

The disc spring 4 has a bowl-like shape with a circular outer periphery and has a convex portion on the lower side. When the convex portion is pressed from the lower side to the upper side, the central portion is partially inverted into a dome shape to form the convex portion. Are formed, a click feeling is generated, and a biasing force is provided. Further, the disc spring 4 is the disc spring storage portion 3a of the handle 3.
Is stored in.

The disc spring driving piece 5 has a circular plate portion 5a which is slightly smaller than the disc spring 4 and a disc spring pressing projection 5b formed on the upper surface of the plate portion 5a and abutting on the convex portion of the disc spring 4. It is composed of a drive projection 5c which is formed on the lower surface of the plate portion 5a and abuts against the abdomen of the cut-and-raised portion 8a of the plate spring 8. Disc spring drive piece 5
Is stored in the disc spring storage portion 3a.

The disc spring lid 6 has a through hole 6a through which the drive protrusion 5c is vertically movable, and a contact pressing protrusion which is provided on the lower surface of the disc spring lid 6 and abuts against the leaf spring main body portion 8b of the leaf spring 8. 6b and. As shown in FIG. 8, the disc spring lid 6 is attached to the disc spring storage portion 3a and stores the disc spring 4 and the disc spring drive piece 5 in the disc spring storage portion 3a.

The body 2 is a box, and on the upper surface of the body 2, a rib 2a that abuts the free end of the cut-and-raised portion 8a of the leaf spring 8 and an engagement that engages with the inner longitudinal surface of the cover 1. And a section 2b. Further, on the upper surface of the body 2, a conductive contact plate 10 having a fixed contact 10a and having a substantially L shape in plan view is provided.
And an electrically conductive support plate 9 having a substantially Z shape in plan view for attaching one end of the leaf spring 8 are attached so as not to contact each other. One end portion of the one end and the support plate 9 of the contact plate 10 is connected to an external signal line.

The leaf spring 8 is a rectangular plate body having electrically conductive elasticity. The leaf spring body 8b has an opening in the center, one end 8c is slightly bent, and a movable contact 8d at the other end. And a cut-and-raised portion 8a which is cut and raised from the leaf spring body portion 8b and one end of which is axially supported by the edge of the opening of the leaf spring body portion 8b. Further, one end 8 c of the leaf spring main body 8 b is attached to the attachment portion of the support plate 9, and the leaf spring 8 is supported by the support plate 9. Since one end 8c of the leaf spring main body portion 8b is slightly bent, when the leaf spring 8 is attached to the support plate 9, the leaf spring 8 forms a predetermined angle with the body 2 as shown in FIG.

The protective case 7 is an insulative box having an open lower surface, and is attached to the body 2 to accommodate the leaf spring 8, the contact plate 10 and the support plate 9. An opening 7a is provided on the upper surface of the protective case 7, the drive projection 5c passes through the opening 7a and comes into contact with the cut-and-raised portion 8a, and the contact pressing projection 6b passes through the opening 7a and becomes a plate. It contacts the spring body 8b.

The operation of the push button switch configured as described above will be described below. First, as shown in FIG. 8, when the handle 3 is not pressed at all, the drive projection 5c is not in contact with the cut-and-raised portion 8a, and the contact pressing projection 6b is the leaf spring main body portion 8b. Is not in contact with. Therefore, the leaf spring body 8b forms a predetermined angle with the body 2, and the movable contact 8d of the leaf spring 8 and the fixed contact 10a of the contact plate 10 attached to the body 2 do not contact each other, The push button switch is in a non-conductive state.

Next, when the operator presses the handle 3,
As shown in FIG. 9, the drive protrusion 5c first comes into contact with the abdomen of the cut-and-raised portion 8a and pushes it downward, and the contact pressing protrusion 6b also pushes the leaf spring body 8b downward.
Will have a bias.

[0014] When the further operator presses the handle 3, cut-and-raised portion 8a is pushed down further downward, along with the free ends of the cut-and-raised portion 8a abuts against the ribs 2a, lifted portions 8 a is It also has a biasing force. When the handle 3 is further pressed, the disc spring driving piece 5 is pushed upward by the biasing force, and the disc spring pressing projection 5 of the disc spring driving piece 5 is pushed.
b pushes the convex portion of the disc spring 4 upward.

Then, as shown in FIG. 10, when pressed by the disc spring pressing protrusion 5b, the central portion of the disc spring 4 is inverted so as to have a convex portion upward to generate a click feeling and also has a biasing force. And at the same time, the contact pressing projection 6b
The movable contact 8d of the leaf spring body 8b, which is pushed down, contacts the fixed contact 10a. Therefore, when the operator feels the click feeling, the fixed contact 10a and the movable contact 8d are
Know that and have contacted and the push button switch has become conductive.

When the pressing force of the handle 3 is removed, the leaf spring 8 pushes up the drive projection 5c and the contact pressing projection 6b upward by the urging force and returns to the original state shown in FIG. The spring 4 returns to a bowl shape by its own urging force,
Further, since the fixed contact 10a and the movable contact 8d are not in contact with each other, the push button switch is in a non-conductive state.

[0017]

However, in the push button switches as shown in FIGS. 7 to 10, the components for generating the click feeling are the disc spring 4, the disc spring driving piece 5, and the disc. Since the spring lid 6 has a large number of parts and a complicated structure, there is a problem that the assemblability is low and the click feeling varies depending on the accuracy of parts and the accuracy of assembly.

The present invention has been made in order to solve the above-mentioned problems, and its purpose is to easily assemble and to accurately confirm the conductive state and the non-conductive state with little variation in reversal characteristics. It is to provide a push button switch that can be used.

[0019]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an invention as set forth in claim 1, in which a handle, one end of which is pivotally supported, is pressed with a fingertip to move the free end side. Press down on the leaf spring having a movable contact to the movable contact in contact with the fixed contact provided on the main body contacts a push button switch so as to close the operation, provided on the bottom surface portion of the handle
A disc spring accommodating portion that is, a disc spring issuing click feeling when inverted is accommodated in the disc spring storage portion, the disc spring is of housing
And a drive piece that pushes down the leaf spring and presses the leaf spring with the urging force of the leaf spring to reverse the leaf spring, the leaf spring having a central portion.
A leaf spring body with a movable contact opening and a leaf spring book
Cut and raised from the body with one end pivotally supported on the opening edge
The drive piece includes a cut-and-raised portion of the leaf spring.
It is pushed down.
A contact pressing protrusion that comes in contact with the leaf spring body of
The push button switch has elasticity in the approximate center of the disc spring lid.
A driving piece that can be moved up and down is sandwiched between the supporting arms
This disc spring drive lid is integrated with the drive piece.
It is characterized by that.

According to the second aspect of the present invention, the handle whose one end is pivotally supported is pressed with a fingertip, and the leaf spring having the movable contact on the free end side is pushed down to move the movable contact into the main body. A push-button switch that can be operated by closing the contact by making contact with the fixed contact provided on the handle.
Stored in the disc spring storage part and the disc spring storage part
The disc spring that gives a click feeling when the
And a drive piece for pushing down the plate spring and reversing the plate spring by the urging force of the plate spring.The plate spring has an opening at the center.
Disconnect the leaf spring body with the movable contact from the leaf spring body.
And a cut-and-raised part whose one end is axially supported by the opening edge.
And the drive piece pushes down the cut-and-raised part of the leaf spring.
The leaf spring of the leaf spring is attached to the lower surface of the disc spring lid.
A push button switch provided with a contact pressing protrusion that abuts the main body.
In this case, the disc spring and the driving piece
It is characterized in that the piece is inserted into the through hole of the disc spring lid .

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a push button switch according to the present invention will be described with reference to FIGS. 1 to 3, and a second embodiment will be described with reference to FIGS.

[First Embodiment] FIG. 1 is a sectional view of an essential part of a push button switch. FIG. 1A is a sectional view of an essential part in a process in which a handle is pressed, and FIG. It is a principal part sectional view of the opened state. FIG. 2 is a perspective view of the disc spring drive lid. FIG. 3 is a sectional view of a main part of the disc spring drive lid. In FIG. 1, the same parts as those of the push button switch described in the above-mentioned conventional technique are designated by the same reference numerals, and detailed description of the same parts will be omitted.

The push button switch of the first embodiment shown in FIG. 1 is different from the push button switch described in the above-mentioned prior art in that it has the following features.

That is, the disc spring drive piece and the disc spring lid are integrated to form the disc spring drive lid 11 shown in FIG.

In FIG. 2, the disc spring drive lid 11 is a plate body having a substantially circular shape in plan view, and is attached to the disc spring storage portion 3a shown in FIG. 1 (a) so that the disc spring 4 is inside the disc spring storage portion 3a. To be stored in. The disc spring drive lid 11 has a contact pressing protrusion 11 a provided on the lower surface and abutting against the leaf spring main body portion 8 b of the leaf spring 8, and a drive piece 11 b provided at a substantially central portion of the disc spring drive lid 11.

The driving piece 11b is sandwiched between supporting arms 11e and 11f having elasticity from two opposing directions, and the upper portion of the driving piece 11b projects upward to come into contact with the convex portion of the disc spring 4 to press the disc spring. The drive protrusion 11 becomes a protrusion 11c, the lower portion of which extends downward and contacts the abdomen of the cut-and-raised portion 8a of the leaf spring 8.
It becomes d.

As shown in FIG. 3, the driving piece 11b can move up and down by the elasticity of the support arms 11e and 11f which are sandwiched.

Next, the operation of the push button switch configured as described above will be described below. First, when the operator presses the handle 3, as shown in FIG.
1d abuts against the abdomen of the cut-and-raised portion 8a and pushes it down,
The contact point pressing projection 11a also pushes down the leaf spring main body portion 8b, so that the leaf spring 8 has an urging force.

[0029] When the further operator presses the handle 3, cut-and-raised portion 8a is pushed down further downward, along with the free ends of the cut-and-raised portion 8a abuts against the ribs 2a, lifted portions 8 a is It also has a biasing force. Further, when the hand 3 is pressed, the driving piece 11b is pressed upward by the biasing force, the support arms 11e and 11f are elastically deformed, the driving piece 11b moves upward, and the disc spring pressing protrusion is moved. 11c pushes the convex portion of the disc spring 4 upward.

Then, as shown in FIG. 1 (b), when pressed by the disc spring pressing protrusion 11c, the central portion of the disc spring 4 is inverted so as to have a convex portion upward, and a click feeling is generated. As a result, the movable contact 8d of the leaf spring body 8b pressed by the contact pressing protrusion 11a comes into contact with the fixed contact 10a. Therefore, the operator knows that the fixed contact 10a and the movable contact 8d are in contact with each other by feeling the click feeling, and the push button switch is in the conductive state.

When the pressing force of the handle 3 is removed, the leaf spring 8 is returned to the original state by pushing up the drive projection 11d and the contact pressing projection 11a by the urging force, and the supporting arms 11e and 11f. Also, the elastic deformation is removed to support the drive piece 11b at the original position, the disc spring 4 returns to a bowl shape by its own urging force, and the fixed contact 10a and the movable contact 8d become non-contact, so that the push button switch is It becomes non-conductive.

[Second Embodiment] FIG. 4 is a sectional view of the main part of the push button switch. FIG. 4A is a sectional view of the main part in the process in which the handle is pressed, and FIG. It is a principal part sectional view of the opened state. FIG. 5 is a perspective view of the disc spring. FIG. 6 is a sectional view of the disc spring. Note that, in FIG. 4, the same reference numerals are given to the same parts as the push-button switch described in the above-mentioned conventional technique, and detailed description of the same parts will be omitted.

The push button switch of the second embodiment shown in FIG. 4 is different from the push button switch described in the above-mentioned prior art in that it has the following features.

That is, the disc spring and the disc spring driving piece are integrated to form the disc spring 12 shown in FIG.

In FIGS. 5 and 6, the disc spring 12 has a bowl shape with a circular outer periphery, a convex portion is located below, and a drive piece 12a is provided penetrating the convex portion. The drive piece 12 a is provided by penetrating the convex portion of the disc spring 12.
This is because the a and the disc spring 12 are firmly coupled to each other, so that the drive piece 12a extends downward from the convex portion of the disc spring 12.
May be provided. The lower end portion of the drive piece 12a serves as a drive protrusion 12b that comes into contact with the abdomen of the cut-and-raised portion 8a of the leaf spring 8.

When the drive projection 12b at the lower end of the drive piece 12a is pressed upward from below in the disc spring 12, the central portion is partially inverted into a dome shape to form a convex portion, which causes a click feeling. At the same time, it comes to have a biasing force. Further, the disc spring 12 is stored in the disc spring storage portion 3 a of the handle 3. Then, the driving piece 12a passes through the through hole 6a of the disc spring lid 6 and further through the opening 7a of the protective case 7, and comes into contact with the cut-and-raised portion 8a.

Next, the operation of the push button switch configured as described above will be described below. First, when the operator presses the handle 3, as shown in FIG.
2b comes into contact with the abdomen of the cut-and-raised portion 8a and pushes it down,
The contact point pressing projection 6b also pushes down the leaf spring body portion 8b, and the leaf spring 8 has an urging force.

[0038] When the further operator presses the handle 3, cut-and-raised portion 8a is pushed down further downward, along with the free ends of the cut-and-raised portion 8a abuts against the ribs 2a, lifted portions 8 a is It also has a biasing force. Further, when the handle 3 is pressed, the driving piece 12a is pressed upward by the biasing force, and the convex portion of the disc spring 12 is pushed upward.

Then, as shown in FIG. 4 (b), the central portion of the disc spring 12 is inverted so as to have an upward convex portion to generate a click feeling, and also has a biasing force, and at the same time, a contact point. The movable contact 8d of the leaf spring body 8b pushed down by the pressing protrusion 6b comes into contact with the fixed contact 10a. Therefore, the operator knows that the fixed contact 10a and the movable contact 8d are in contact with each other by feeling the click feeling, and the push button switch is in the conductive state.

When the pressing force of the handle 3 is removed, the leaf spring 8 returns to its original state by pushing up the drive projection 12a and the contact pressing projection 6b by the urging force.
The disc spring 12 returns to a bowl shape by its own biasing force, and the fixed contact 10a and the movable contact 8d are also in non-contact, so that the push button switch is in a non-conductive state.

[0041]

Since the push button switch of the present invention is constructed as described above, in the invention of claim 1, when the handle is pressed with the disc spring drive piece and the disc spring lid being integrated. Since the number of parts has been reduced without impairing the click feeling, the assembly is easy and there is little variation in the reversal characteristics, so no click feeling occurs even when the movable contact and the fixed contact are in contact. In addition, there is no click feeling even when the movable contact and the fixed contact are not in contact with each other, and when the movable contact and the fixed contact come into contact, the click feeling occurs and the conduction state is accurate. There is an effect that it is possible to provide a push button switch capable of confirming the non-conduction state.

According to the second aspect of the present invention, the disc spring and the disc spring driving piece are integrally formed, and the number of parts is reduced without impairing the click feeling when the handle is pressed, so that the assembly is easy. Therefore, even if the movable contact and the fixed contact are in contact with each other, there is little variation in the reversal characteristics, and therefore the click feeling does not occur, and the movable contact and the fixed contact are not in contact with each other. It is possible to provide a push-button switch capable of accurately confirming a conductive state or a non-conductive state by generating a click feeling when the movable contact and the fixed contact come into contact with each other without causing a click feeling regardless. Produce an effect.

[Brief description of drawings]

1A and 1B are cross-sectional views of a main part of a push-button switch according to a first embodiment of the present invention, in which FIG. 1A is a cross-sectional view of a main part in a process in which a handle is being pressed, and FIG. FIG. 4 is a cross-sectional view of a main part in a cut state.

FIG. 2 is a perspective view of a disc spring drive lid.

FIG. 3 is a sectional view of an essential part of a disc spring drive lid.

4A and 4B are cross-sectional views of a main part of a push button switch according to a second embodiment of the present invention, FIG. 4A is a cross-sectional view of a main part in a process in which a handle is pressed, and FIG. FIG. 4 is a cross-sectional view of a main part in a cut state.

FIG. 5 is a perspective view of a disc spring.

FIG. 6 is a sectional view of a disc spring.

FIG. 7 is an exploded perspective view of a conventional push button switch.

FIG. 8 is a cross-sectional view of essential parts of the push button switch in a state where the handle is not pressed.

FIG. 9 is a cross-sectional view of essential parts of the push button switch in a state where the handle is being pressed.

FIG. 10 is a cross-sectional view of essential parts of the push button switch in a state where the handle is completely pressed.

[Explanation of symbols]

3 handles 3a Disc spring storage 4 Disc spring 8 leaf spring 8d movable contact 10a fixed contact 11 Disc spring drive lid 11b drive piece 12 Disc spring 12a drive piece

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroki Hata 2856 Shiratsuka-cho, Tsu-shi, Mie Asahi Electric Industry Co., Ltd. (56) Reference JP 59-96618 (JP, A) JP 5-325704 ( JP, A) Actual development 59-93035 (JP, U) Actual development 50-15377 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01H 21/00 H01H 21/50

Claims (2)

(57) [Claims] 1. A contact in which a handle whose one end is pivotally supported is pressed with a fingertip to push down a leaf spring having a movable contact on the free end side to bring the movable contact into contact with a fixed contact provided in the main body. the a push button switch which is adapted to closing operation, Ha
Belleville spring storage section provided on the bottom of the handle
It is attached to the disc spring which is stored in the storage part and gives a click feeling when it is inverted and the disc spring storage part where the disc spring is stored.
A disc spring lid, and a drive piece that pushes down the plate spring and presses the disc spring with the urging force of the plate spring to invert it .
The leaf spring is a leaf spring that has a movable contact with an open center.
The main body and the leaf spring main body are cut and raised to open one end at the same time.
A cut-and-raised portion pivotally supported on the rim, and the drive piece,
The cut-and-raised part of the leaf spring is pushed down.
On the bottom surface of the lid, there is a contact point that abuts against the leaf spring body of the leaf spring.
In a push button switch provided with a pressing protrusion, a disc spring lid
Moves up and down by being sandwiched between elastic support arms in the approximate center of
By providing a free drive piece, this disc spring lid is integrated with the drive piece.
A push button switch characterized by a new disc spring drive lid . 2. A contact whose one end is pivotally supported is pressed by a fingertip to push down a leaf spring having a movable contact on the free end side to bring the movable contact into contact with a fixed contact provided in the main body. the a push button switch which is adapted to closing operation, Ha
Belleville spring storage section provided on the bottom of the handle
Dish bar that gives a click feeling when it is stored in the storage part and inverted
It is installed in the disc spring storage part where the disc spring is stored.
And a drive piece that pushes down the plate spring and reverses the plate spring by the urging force of the plate spring.
Ne is a leaf spring body that has a movable contact with an open center.
And the blade spring body is cut and raised, and one end is aligned with the opening edge.
A cut-and-raised portion supported by the leaf spring.
It is to push down the cut and raised part of
On the surface, a contact pressing protrusion that contacts the leaf spring body of the leaf spring
In the push button switch provided with,
, And insert this drive piece into the through hole of the disc spring lid.
Push button switch characterized by