CN210535552U

CN210535552U - Trigger device with noise reduction function

Info

Publication number: CN210535552U
Application number: CN201922056062.5U
Authority: CN
Inventors: 陈俊傑; 曾令丞; 黄庆瑶
Original assignee: Sunrex Technology Corp
Current assignee: Sunrex Technology Corp
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-05-15
Anticipated expiration: 2029-11-25

Abstract

A trigger device with a noise reduction function comprises a circuit substrate, an arched elastic sheet and a noise reduction unit. The circuit substrate comprises a first node and a second node. When the first node and the second node are electrically conducted with each other, a pressing signal is generated. The noise reduction unit is connected between the circuit substrate and the arched elastic sheet and comprises a first conducting sheet and a second conducting sheet, wherein the first conducting sheet is electrically connected to the first node, and the second conducting sheet is electrically connected to the second node, surrounds the first conducting sheet and is used for fixing the arched elastic sheet. The first conductive sheet defines a first thickness. The second conductive sheet defines a second thickness and is capable of being compressed. The second thickness is greater than the first thickness. The utility model discloses a second thickness is greater than first thickness just the second conducting strip can be compressed, makes the vibrations that the arch shell fragment causes at the pressing process reduce to produce noise abatement's effect.

Description

Trigger device with noise reduction function

Technical Field

The utility model relates to a signal switch especially relates to a trigger device of utensil noise reduction function.

Background

A conventional push switch includes a substrate having an electronic circuit and a metal dome disposed on the substrate. The user can press the metal elastic sheet to make the metal elastic sheet flex and contact with the substrate, so that the electronic circuit of the substrate generates a pressing signal to achieve the function of detecting the pressing action of the user. However, the vibration generated when the metal spring and the substrate contact each other can generate noise, which results in poor user experience. Therefore, how to effectively reduce the noise becomes a problem worthy of investigation.

Disclosure of Invention

An object of the utility model is to provide a noise reduction's of effective noise reduction utensil trigger device.

The utility model discloses utensil noise reduction function's trigger device contains circuit substrate, arch shell fragment, and noise reduction unit.

The circuit substrate comprises an electronic circuit capable of detecting a pressing signal. The electronic circuit has a first node and a second node. The pressing signal is generated when the first node and the second node are electrically conducted with each other. The arched elastic sheet comprises a central part, an outer ring part surrounding the outer side of the central part, and a bending part connected between the central part and the outer ring part. The central portion is raised in a pressing axial direction with respect to the outer ring portion.

The noise reduction unit is connected between the circuit substrate and the arched elastic sheet. The noise reduction unit comprises a first conducting strip and a second conducting strip, wherein the first conducting strip is electrically connected to the first node, and the second conducting strip is electrically connected to the second node. The first conducting strip and the second conducting strip are spaced from each other, and the second conducting strip surrounds the first conducting strip. The first conductive sheet is fixed to the circuit board and corresponds to the central portion in the pressing axial direction. The second conducting strip is fixed on the circuit substrate and used for fixing the outer ring part. The first conductive sheet defines a first thickness along the pressing axis. The second conductive tab defines a second thickness along the pressing axis and is capable of being compressed along the pressing axis. The second thickness is greater than the first thickness.

The arched dome is movable relative to the noise reduction unit between a default position, a deflected position, and a contact position. In the default position, the central portion is spaced apart from the first conductive sheet away from the first conductive sheet. In the flexed position, the flexure flexes such that the central portion is proximate to but not in contact with the first conductive sheet. When the second conductive sheet is in the contact position, the second conductive sheet is compressed along the pressing axial direction, so that the central part is in contact with the first conductive sheet to form electrical connection, and the first node and the second node are electrically conducted with each other.

The utility model discloses utensil noise reduction function's trigger device, the material of first conducting strip is the copper foil.

The utility model discloses utensil noise reduction function's trigger device, the material of first conducting strip is the aluminium foil.

The utility model discloses utensil noise reduction function's trigger device, first conducting strip is circular.

The utility model discloses a have noise reduction function's trigger device, the material of second conducting strip is electrically conductive non-woven fabrics.

The utility model discloses utensil noise reduction function's trigger device, the second conducting strip be the ring form encircle in first conducting strip.

The utility model discloses utensil noise reduction function's trigger device, the second thickness with the difference between the first thickness is greater than 0.08 millimeter.

The utility model discloses have noise reduction function's trigger device, the difference between the second thickness with first thickness is virtually equal to 0.1 millimeter.

The beneficial effects of the utility model reside in that: the second thickness is larger than the first thickness, and the second conducting strip can be compressed, so that the vibration of the arched elastic sheet in the pressing process is reduced, and the effect of reducing noise is further achieved.

Drawings

Fig. 1 is a bottom view of an embodiment of a noise-reducing triggering device of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

fig. 3 is a fragmentary cross-sectional view taken along line iii-iii of fig. 2, showing a dome in a default position, with the dome in a deflected position shown in phantom; and

fig. 4 is a cross-sectional view similar to fig. 3, showing the dome-shaped dome in a contact position.

Detailed Description

Referring to fig. 1, 2 and 3, an embodiment of a trigger device with noise reduction function of the present invention includes a circuit substrate 1, an arched elastic piece 2 and a noise reduction unit 3.

The circuit substrate 1 includes an electronic circuit capable of detecting a pressing signal. The electronic circuit has a first node and a second node. The pressing signal is generated when the first node and the second node are electrically conducted with each other.

The arched elastic piece 2 comprises a central portion 21, an outer ring portion 22 surrounding the central portion 21, and a flexible portion 23 connected between the central portion 21 and the outer ring portion 22. The central portion 21 is raised in a pressing axial direction X with respect to the outer ring portion 22.

The noise reduction unit 3 is connected between the circuit board 1 and the arched elastic sheet 2. The noise reduction unit 3 includes a first conductive plate 31 electrically connected to the first node, and a second conductive plate 32 electrically connected to the second node. The first conductive sheet 31 and the second conductive sheet 32 are spaced from each other, and the second conductive sheet 32 surrounds the first conductive sheet 31. The first conductive plate 31 is fixed to the circuit board 1 and corresponds to the central portion 21 along the pressing axis X. The second conductive plate 32 is fixed to the circuit substrate 1 and is used for fixing the outer ring 22. The first conductive plate 31 defines a first thickness D1 along the pressing axis X. The second conductive sheet 32 defines a second thickness D2 along the pressing axis X and can be compressed along the pressing axis X. The second thickness D2 is greater than the first thickness D1.

In this embodiment, the first conductive sheet 31 is circular and made of copper foil. The second conductive sheet 32 is annularly surrounded on the first conductive sheet 31 and is made of conductive non-woven fabric. However, the shapes and materials described herein are well known and are merely examples, and other known shapes and materials may be selected according to practical implementation conditions, and should not be limited thereto. For example: the first conductive sheet 31 may also be made of aluminum foil and have a non-circular shape.

In addition, according to experience, the difference between the second thickness D2 and the first thickness D1 is greater than 0.08 mm, so that a better noise reduction effect can be obtained. In the embodiment, the difference between the second thickness D2 and the first thickness D1 is substantially equal to 0.1 mm, but the invention is not limited thereto.

The dome-shaped dome-. In the default position, the central portion 21 is spaced apart from the first conductive plate 31 away from the first conductive plate 31. In the deflected position, the deflection portion 23 deflects such that the central portion 21 approaches but does not contact the first conductive sheet 31. In the contact position, the second conductive sheet 32 is compressed along the pressing axis X to make the central portion 21 contact with the first conductive sheet 31 to form an electrical connection, so that the first node and the second node are electrically connected.

When the present embodiment is not pressed, the dome-shaped dome 2 is at the default position. Since the central portion 21 is spaced apart from the first conductive sheet 31, the first node and the second node are not electrically connected to each other, and the pressing signal is not generated naturally.

When the embodiment is pressed along the pressing axis X, the dome-shaped spring 2 reaches the deflection position (as shown by the phantom line in fig. 3) and then reaches the contact position (see fig. 4). It should be noted that, in the deflected position, the pressing signal is still not generated because the central portion 21 is not in contact with the first conductive sheet 31. However, at this time, the dome-shaped spring 2 has been deformed from the originally convex shape to the concave shape to be largely deformed, and the central portion 21 is made closer to the first conductive plate 31. Next, the dome-shaped spring 2 mainly relies on compressing the second conductive plate 32 (without self-deformation) to move the central portion 21 toward the first conductive plate 31, and finally reaches the contact position. In the contact position, the first node and the second node are electrically conductive with each other to generate the pressing signal. Therefore, the function of detecting the pressing action can be achieved through the embodiment. In addition, when the pressing force is removed, the dome-shaped spring plate 2 and the second conductive plate 32 can return to the default position by the elastic restoring force of the dome-shaped spring plate and the second conductive plate.

Compared with the design of directly flexing the metal elastic sheet and contacting the substrate in the prior art, the present embodiment further disassembles the pressing process into a flexing stage and a compressing stage. In particular, movement from the default position to the deflected position is in a deflected phase and movement from the deflected position to the contact position is in a compressed phase. In this way, the arched elastic sheet 2 is deformed substantially in the bending stage, and the vibration generated in the deformation process can be released through the uncompressed second conductive sheet 32, thereby achieving the effect of reducing noise in the bending stage. In the compression stage, the deformed dome-shaped spring plate 2 mainly compresses the second conductive plate 32 to contact the first conductive plate 31. That is, the second conductive sheet 32 plays a role of buffering during the contact process, so as to further reduce the vibration, thereby generating the effect of reducing the noise during the compression stage. In general, the present embodiment can exhibit noise reduction effects in both the flexing and compressing stages.

To sum up, the utility model discloses a trigger device of noise reduction function is greater than this first thickness D1 and this second conducting strip 32 can be compressed through this second thickness D2 for this arch shell fragment 2 is pressing the vibrations that the in-process causes and is reducing, and then produces the effect of noise reduction, so can reach the purpose of the utility model really.

Claims

1. The utility model provides a trigger device of utensil noise reduction function, contains circuit substrate, arch shell fragment, and noise reduction unit, its characterized in that:

the circuit substrate comprises an electronic loop capable of detecting a pressing signal, wherein the electronic loop is provided with a first node and a second node, and the pressing signal is generated when the first node and the second node are electrically conducted with each other;

the arched elastic sheet comprises a central part, an outer ring part surrounding the outer side of the central part and a bending part connected between the central part and the outer ring part, and the central part is raised relative to the outer ring part along a pressing axial direction;

the noise reduction unit is connected between the circuit substrate and the arched elastic sheet, and comprises a first conducting sheet and a second conducting sheet, wherein the first conducting sheet is electrically connected to the first node, the second conducting sheet is electrically connected to the second node, the first conducting sheet and the second conducting sheet are mutually spaced, the second conducting sheet surrounds the first conducting sheet, the first conducting sheet is fixed on the circuit substrate and corresponds to the central part along the pressing axial direction, the second conducting sheet is fixed on the circuit substrate and is used for fixing the outer ring part, the first conducting sheet defines a first thickness along the pressing axial direction, the second conducting sheet defines a second thickness along the pressing axial direction and can be compressed along the pressing axial direction, and the second thickness is larger than the first thickness;

the arched elastic sheet can move among a default position, a deflection position and a contact position relative to the noise reduction unit, when the arched elastic sheet is at the default position, the central part is far away from the first conducting sheet and is spaced from the first conducting sheet, when the arched elastic sheet is at the deflection position, the deflection part deflects to enable the central part to be close to but not contacted with the first conducting sheet, when the contact position, the second conducting sheet is compressed along the pressing axial direction to enable the central part to be contacted with the first conducting sheet to form electrical connection, and then the first node and the second node are electrically conducted with each other.

2. The trigger device with a noise reduction function according to claim 1, wherein: the first conducting strip is made of copper foil.

3. The trigger device with a noise reduction function according to claim 1, wherein: the first conducting strip is made of aluminum foil.

4. The trigger device with a noise reduction function according to claim 1, wherein: the first conducting strip is circular.

5. The trigger device with a noise reduction function according to claim 1, wherein: the second conducting strip is made of conducting non-woven fabric.

6. The trigger device with a noise reduction function according to claim 1, wherein: the second conducting strip is in a circular ring shape and surrounds the first conducting strip.

7. The trigger device with a noise reduction function according to claim 1, wherein: the difference between the second thickness and the first thickness is greater than 0.08 millimeters.

8. The trigger device with a noise reduction function according to claim 7, wherein: the difference between the second thickness and the first thickness is substantially equal to 0.1 millimeters.