JPH07262873A - Two-stage push button switch - Google Patents

Abstract

PURPOSE:To provide a two-stage push button switch capable of continuously conducting two switching operation by one push button switch. CONSTITUTION:A two-stage push button switch contains a base board 11, a push button supported movably up and down on the base board 1, two rods 15a, 15b protruded downward from the push button 15, and switches 16, 17 arranged in a lower region of each rod of the base board 1. A contact part 19 supported movably up and down to the rod through a spring 18 is formed at the lower end of one rod 15a. The two-stage push button switch 10 is constituted so that the lower surface of the contact part 19 normally exists in the lower position than the lower end of the other rod.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a two-stage push button switch used for an autofocus switch of a video camera or the like and having a two-stage switch operation.

[0002]

2. Description of the Related Art Conventionally, when two push button switches are operated by two push button switches, two desired push button switches are arranged side by side and each push button is operated continuously to perform two desired switch operations. I am trying.

[0003]

However, in the push button switch having such a structure, it is necessary to continuously operate the two push button switches for the switch operation. Therefore, the switch operation is troublesome, and since two push button switches are required, the component cost and the assembly cost increase, and the mounting space becomes relatively large. There is a problem that various equipments and the like to be provided become relatively large.

In view of the above points, it is an object of the present invention to provide a two-stage push button switch which is capable of continuously performing two switch operations with one push button switch. I am trying.

[0005]

According to the present invention, the above objects are achieved by a substrate, a push button movably supported on the substrate, and two rod portions projecting downward from the push button. And a switch portion disposed in the lower region of each rod portion of the substrate, and a switch supported by a lower end of one rod portion so as to be vertically movable with respect to the rod portion via a spring. This is achieved by a two-stage pushbutton switch, which is provided with a contact and whose lower surface is usually lower than the lower end of the other rod.

In the two-stage push-button switch according to the present invention, preferably, at least one of the two switch parts has two switch contacts spaced apart from each other on the substrate surface and the lower end or abutment of the rod part. And a conducting portion formed on the portion, and when the push button is pressed, the conducting portion is brought into contact with both switch contacts at the same time, and the two switch contacts are brought into conduction, thereby performing a switch operation. Can be

In the two-step push button switch according to the present invention, preferably, at least one of the two switch parts is a rubber switch disposed on the surface of the substrate, and when the push button is pressed, By pressing the rubber switch from above, the lower end of the rod section
A switch operation can be performed.

[0008]

According to the above structure, when the push button is pressed with fingers or the like during the switch operation, the contact portion provided at the lower end of the one rod portion first comes into contact with the corresponding switch portion. The switch unit can be operated by a switch. Then, when the push button is pressed, the one rod portion is lowered against the tension of the spring, and the other rod portion is also lowered, and the lower end of the other rod portion corresponds to the corresponding switch. The switch portion can be operated by abutting on the portion.

Thus, by pressing the push button once, in the first stage, one rod operates the corresponding switch, and in the second stage, the other rod operates the corresponding switch. Will be operated. As a result, only one push-button switch needs to be provided to perform the two switch operations, so that the component cost and the assembly cost can be reduced. Further, since the mounting space for one push button switch is sufficient, the size of the entire device can be reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. FIG. 1 shows an embodiment of a push button switch according to the present invention. The push button switch 10 comprises a substrate 11, a membrane 12 mounted on the substrate 11, and a membrane 12 from above. A lever portion 14 including an annular inner case 13 attached to the substrate 11, an annular main body 14a fitted and inserted into the inner case 13, and an extension portion 14b radially protruding from the main body, and the lever portion. Two switches arranged on the substrate 11 below the push button 15 fitted in the hollow portion of the main body 14a of 14 and the two rod portions 15a and 15b protruding downward from the push button. Part 1
6 and 17 are included.

The push button 15 has a center shaft 15c extending downward from the center thereof.
c is fitted in a through hole 11a provided in the substrate 11 and is urged upward by a spring 15d.

The push button 15 is provided with an abutting portion 19 which is supported by the first rod portion 15a so as to be vertically movable via a spring 18. In this case, the contact portion 19
Has a lower surface having conductivity because its lower surface is covered with a conductive material or is entirely composed of a conductor. On the other hand, the corresponding switch portion 16 is composed of two contacts 16a and 16b formed on the substrate 11 so as to be separated from each other. Accordingly, when the push button 15 is pressed, the contact portion 19
The lower surface of the two contact points 16a, 16b of the switch unit 16.
Abut. Thus, the two contacts 16a, 16b are brought into conduction, and the switch operation is performed.

The second rod portion 1 of the push button 15
When the push button 15 is pressed down, the lower end of the 5b abuts the switch portion 17. In the illustrated case, the switch portion 17 is configured as a rubber switch, so that the switch operation can be performed when the lower end of the second rod portion 15b comes into contact.

Here, the lower end of the contact portion 19 supported by the lower end of the first rod portion 15a is positioned lower than the lower end of the second rod portion 15b in a state where the spring 18 is not compressed. It is configured. Therefore, when the push button 15 is pressed, the contact portion 19 that is first supported by the first rod portion 15a contacts the switch portion 16, and the switch portion 16
Switch operation is performed.

After that, when the push button 15 is further depressed, the second rod portion 15b descends, and the lower end of the second rod portion 15b contacts the switch portion 17. As a result, the switch operation in the switch unit 17 is performed.

An annular slider 20 is provided on the inner surface of the inner case 13. The slider 20 is
An engaging portion 14c extending downward inside the lever portion 14 engages with the lever portion 14 so as to be vertically locked to the inner case 13 and perpendicular to the substrate 11. It is supported so that it can rotate around.

Further, the lever portion 14 is provided with a lock portion 14d (see FIG. 2) which engages with a flange portion 15e around the push button 15 from below. On the other hand, the push button 15 has the collar portion 15e and the lock portion 14d.
It has a cutout portion 15f that allows passage in the up and down direction. As a result, as shown in FIG. 2, the lock portion 14d of the lever portion 14 has the cutout portion 1 of the flange portion 15e of the push button 15.
If aligned with 5f, push button 15 may be depressed downward.

From this state, when the extension portion 14b of the lever portion 14 is rotated by a finger or the like as shown by an arrow A in FIG. 2, the lock portion 1 of the lever portion 14 is rotated as shown in FIG.
4d is displaced from the cutout portion 15f of the flange portion 15e of the push button 15, so that the push button 15 is prevented from being pressed. Thus, the push button 15 is locked.

Further, as shown in FIG. 1, a contact brush 21 is attached to the slider 20, and the tip of the contact brush 21 contacts a contact (not shown) provided on the substrate 11. Is ready to go. As a result, when the push button 15 is locked, the locked state can be electrically detected.

Pushbutton switch 1 according to an embodiment of the present invention
0 is configured as described above, and when the push button 15 is pushed down with a finger or the like, the push button 15 causes the spring 1 to move.
It is lowered against the tension of 5d. This allows
The lower surface of the contact portion 19 supported by the first rod portion 15a contacts the two contacts 16a and 16b of the switch portion 16. Thus, the two contacts 16a and 16b are brought into conduction, and the switch operation is performed.

Then, when the push button 15 is further depressed, the first rod portion 15a is lowered while resisting the tension of the spring 18, and the second rod portion 15b is also lowered, so that the second rod portion 15b is lowered. The lower end of the rod portion 15b of the switch portion 1
Abut 7. As a result, the switch operation in the switch unit 17 is performed.

After that, when the finger or the like is released from the push button 15, the push button 15 is released based on the tension of the spring 15d.
It is moved upward and returns to the state before the operation. Along with this, the first rod portion 15a and the second rod portion 15
b is separated from the switch parts 16 and 17, respectively, and the switch operation is completed.

Here, when the push button 15 is not pushed down and the extension portion 14b of the lever portion 14 is pushed to rotate the lever portion 14 as shown by an arrow A in FIG. 2, the lever portion 14 is rotated. The lock portion 14d of 14 is displaced from the cutout portion 15f provided in the flange portion 15e of the push button 15. Therefore, when the push button 15 is lowered, the collar portion 15 e of the push button 15 is moved to the lock portion 14 of the lever portion 14.
It can be blocked by abutting d. Thus, the push button 15 can be locked.

The lock of the push button 15 is detected by a circuit (not shown) from a contact on the substrate 11 via a contact brush 21 provided on the lower surface of the slider 20 which is rotated integrally with the lever portion 14. obtain.

To lock the push button 15, the extension portion 14b of the lever portion 14 is rotated in the direction opposite to the arrow A in FIG. 2, and the lock portion 14d of the lever portion 14 is held by the collar of the push button 15. It can be easily released by being aligned with the cutout portion 15f provided in the portion 15e.

In the above-described embodiment, the switch portion 16 has the two contacts 16a and 16b and the rod portion 15
Although the switch operation is performed by the conduction surface of the lower surface of the contact portion 19 supported by a, the switch portion 17 is configured as a rubber switch, but the invention is not limited to this, and each switch portion is not limited thereto. 16, 17
May be a switch structure of a type in which a switch operation is performed by pressing each from above. For example, the switch part 16 may be configured as a rubber switch, and the switch part 17 may include two contacts that can be electrically connected to each other by the lower end of the rod part 15b.

[0027]

As described above, according to the present invention, by pressing the push button once, one rod portion operates the corresponding switch portion in the first stage, and then the second stage. Then, the other rod portion operates the corresponding switch portion. As a result, only one push-button switch needs to be provided to perform the two switch operations, so that the component cost and the assembly cost can be reduced. Further, since the mounting space for one push button switch is sufficient, the size of the entire device can be reduced. Thus, according to the present invention, it is possible to provide an extremely excellent two-stage push button switch in which one push button switch can continuously perform two switch operations.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of a push button switch according to the present invention.

FIG. 2 is a schematic plan view showing a main part of the push button switch of FIG.

3 is a plan view of a push button of the push button switch of FIG. 1. FIG.

FIG. 4 is a schematic plan view showing a locked state of a main part of the push button switch of FIG.

[Explanation of symbols]

 10 Push Button Switch 11 Substrate 12 Membrane 13 Inner Case 14 Lever 14a Body 14b Extension 14c Engagement Claw 14d Lock 15 Push Button 15a, 15b Rod 15c Center Shaft 15d, 18 Spring 15e Collar 15f Notch 16,17 Switch part 16a, 16b Contact point 19 Contact part 20 Slider 21 Contact brush

Claims (3)

[Claims] 1. A substrate, a push button movably supported on the substrate, two rod portions projecting downward from the push button, and a lower region of each rod portion of the substrate. And a contact portion supported by a lower end of one rod portion so as to be vertically movable with respect to the rod portion through a spring, and a lower surface of the contact portion. However, the two-stage push button switch is usually located at a position lower than the lower end of the other rod portion. 2. At least one of the two switch parts is composed of two switch contacts spaced apart from each other on the substrate surface and a conducting part formed at the lower end or abutting part of the rod part. By pressing the push button, the conducting portion simultaneously contacts both switch contacts,
By connecting between the two switch contacts,
The two-stage push button switch according to claim 1, wherein a switch operation can be performed. 3. At least one of the two switch parts is a rubber switch disposed on the surface of the substrate, and when the push button is pressed down, the lower end of the rod part presses the rubber switch from above. The two-stage pushbutton switch according to claim 1, wherein the switch operation can be performed.