阅读说明：本技术 输入装置的按压结构 (Pressing structure of input device ) 是由 王友史 刘志钧 凌正南 戴文杰 于 2020-06-30 设计创作，主要内容包括：本发明提供一种输入装置的按压结构,包括电路板、穹顶件以及触发件。穹顶件设置于电路板上,且穹顶件具有导电性与弹性。触发件设置于穹顶件的中央,且触发件具有电绝缘性与可挠性。触发件具有导电层,面对电路板,其中穹顶件适于被按压而使触发件通过导电层抵接至电路板的触发电路而产生触发信号。(The invention provides a pressing structure of an input device, which comprises a circuit board, a dome piece and a trigger piece. The dome member is disposed on the circuit board, and the dome member has conductivity and elasticity. The trigger is arranged in the center of the dome and has electrical insulation and flexibility. The trigger has a conductive layer facing the circuit board, wherein the dome is adapted to be pressed such that the trigger generates a trigger signal by the conductive layer abutting a trigger circuit of the circuit board.)

1. A pressing structure of an input device, comprising:

a circuit board;

a dome member disposed on the circuit board, the dome member having conductivity and elasticity; and

and a trigger disposed at the center of the dome, the trigger having electrical insulation and flexibility, the trigger having a conductive layer facing the circuit board, wherein the dome is adapted to be pressed so that the trigger abuts against a trigger circuit of the circuit board through the conductive layer to generate a trigger signal.

2. The pressing structure of an input device according to claim 1, wherein the trigger is made of silicone rubber, and the dome is made of metal and fitted to a center of the dome by an insert-injection process.

3. The pressing structure of an input device according to claim 1, wherein the dome has a main body and a peripheral edge surrounding the main body, the peripheral edge abuts against the circuit board so that the main body covers and stands above the circuit board to form a space, the trigger is fitted into and passes through a center of the main body, the conductive layer is located in a part where the trigger penetrates into the space, and the trigger maintains a gap with the circuit board when the dome is not pressed.

4. The pressing structure of an input device according to claim 1, wherein the trigger circuit includes a first circuit and a second circuit electrically disconnected from each other, the dome member abuts against and stands on the second circuit, and when the dome member is not pressed, the trigger member and the first circuit maintain a gap, and when the dome member is pressed, the trigger member abuts against the first circuit through the conductive layer, so that the first circuit and the second circuit are electrically conducted with the dome member through the conductive layer.

5. The pressing structure of an input device according to claim 4, wherein the dome includes a main body and a peripheral edge surrounding the main body, the peripheral edge abutting against the second circuit so that the main body covers and stands above the circuit board with the conductive layer of the trigger and the first circuit kept in a gap.

6. The pressing structure of an input device according to claim 5, wherein the dome further has another conductive layer provided on an inner wall of the main body, the another conductive layer being electrically connected between the second circuit and the conductive layer.

7. The pressing structure of an input device according to claim 4, wherein the dome further has another conductive layer electrically connected between the second circuit and the conductive layer, and when the dome is pressed, the first circuit is electrically connected to the second circuit through the conductive layer and the another conductive layer in this order.

Technical Field

The present disclosure relates to input devices, and particularly to a pressing structure of an input device.

Background

With the advent of the information technology age, the popularization and application of portable electronic devices such as computers or mobile phones and the like are becoming more and more important and diversified as key modules for data input or control of electronic devices.

Taking a keyboard as an example, it usually uses a key cap, an elastic element, a linkage mechanism and a trigger circuit as its main components, and a user presses the key cap, and then the linkage mechanism and the elastic element are physically abutted to make the trigger circuit generate a trigger signal.

However, with the demands of users for using hand feeling and preventing noise, and the like, and the trend of electronic devices toward being lighter and thinner, the conventional keyboard or the related key module cannot meet the above requirements at the same time, or even if the requirements are met, the conventional keyboard or the related key module needs a more complicated manufacturing process or higher manufacturing cost.

Disclosure of Invention

The invention relates to a pressing structure of an input device, which has low pressing stroke and mute effect.

According to an embodiment of the present invention, a pressing structure of an input device includes a circuit board, a dome member, and a trigger member. The dome member is disposed on the circuit board, and the dome member has conductivity and elasticity. The trigger is electrically insulating and is provided at the center of the dome. The trigger has a conductive layer facing the circuit board, wherein the dome is adapted to be pressed such that the trigger generates a trigger signal by the conductive layer abutting a trigger circuit of the circuit board.

In view of the above, in the pressing structure of the input device, the dome member has conductivity and elasticity, the trigger member is disposed at the center of the dome member and has electrical insulation and flexibility, and the trigger member has a conductive layer facing the circuit board. Therefore, when the dome member is pressed, the conducting layer of the trigger member can be smoothly abutted to the trigger circuit of the circuit board to generate a trigger signal, and the trigger member has flexibility to effectively reduce the impact force between the components while triggering, so that the noise generated by the mutual impact of the components is reduced. At the same time, the dome member accumulates elastic force due to the pressing deformation.

In contrast, when the dome is not pressed, the accumulated elastic force of the dome can drive the trigger to reset smoothly and away from the circuit board, i.e. for the pressing structure, the dome can reset smoothly only by the aid of the dome without the aid of other components, so that the pressing structure is simplified, has a short pressing stroke, and can avoid the situation that the components cannot be thinned due to stacking.

Drawings

FIG. 1 is a schematic diagram of a pressing structure according to an embodiment of the invention;

fig. 2 is a partial sectional view of the pressing structure of fig. 1.

Detailed Description

Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.

FIG. 1 is a schematic diagram of a pressing structure according to an embodiment of the present invention, in which some components are dashed to facilitate identification. Fig. 2 is a partial sectional view of the pressing structure of fig. 1. Referring to fig. 1 and fig. 2, in the present embodiment, the pressing structure 100 includes a circuit board 130, a dome 110, and a trigger 120. The dome member 110 is disposed on the circuit board 130, and the dome member 110 has conductivity and elasticity. The trigger 120 is disposed at the center of the dome 110, and the trigger 120 has electrical insulation and flexibility. The trigger 120 also has a conductive layer 122 facing the circuit board 130, wherein the dome 110 is adapted to be pressed to cause the trigger 120 to generate a trigger signal by the conductive layer 122 abutting the trigger circuit TR of the circuit board 130, and at this time the dome 110 is pressed to deform to accumulate elastic force. Once the user releases the force without pressing on the dome 110, the accumulated spring force drives the dome 110 and the trigger 120 thereon to reset.

It should be noted that fig. 2 provides the key cap 140 as an example, but the input device of the present embodiment may be a keyboard, a key, a button, a touch pad (touch pad), or other related devices that generate the corresponding electronic trigger signal by the pressing action of the user. Further, the trigger 120 of the present embodiment is made of silicon rubber, the dome 110 is made of metal, and the center thereof is hollowed out so that the trigger 120 is fitted into the center of the dome 110 by an insert molding (insert molding) process, as shown in fig. 2, the fitting portion 121 of the trigger 120 is fitted into the dome 110, and the conductive layer 122 is located at the bottom of the fitting portion 121.

In detail, the dome 110 has a main body (dome body)112 and a peripheral edge (surrounding edge)111 surrounding the main body 112, and the peripheral edge 111 abuts against the circuit board 130, so that the main body 112 covers and stands above the circuit board 130 to form a space SP. The fitting portion 121 of the trigger 120 is fitted into and penetrates the center of the main body 112, the conductive layer 122 is located at a part where the fitting portion 121 of the trigger 120 penetrates into the space SP, and the trigger 120 maintains a gap G1 with the circuit board 130 when the dome 110 is not pressed. The dome 110 is attached to the peripheral edge 111 and a portion of the circuit board 130 other than the trigger circuit TR, for example, by an adhesive layer (not shown).

In contrast, the trigger circuit TR includes a first circuit 131 and a second circuit 132 electrically disconnected from each other, the dome 110 abuts against and stands on the second circuit 132, that is, the periphery 111 abuts against the second circuit 132, so that the main body 112 covers and stands above the circuit board 130, the conductive layer 122 of the trigger 120 maintains a gap G1 with the first circuit 131, and when the dome 110 is not pressed, the trigger 120 (and the conductive layer 122 thereof) maintains a gap G1 with the first circuit 131. Conversely, when the dome 110 is pressed, the trigger 120 is driven to abut against the first circuit 131 through the conductive layer 122, so that the first circuit 131 and the second circuit 132 are electrically connected to the dome 110 through the conductive layer 122.

Referring to fig. 2 again, in the present embodiment, the dome 110 further has another conductive layer 113 disposed on the inner wall of the main body 112, and the another conductive layer 113 is electrically connected between the second circuit 132 and the conductive layer 122. When the dome 110 is pressed, the first circuit 131 is electrically connected to the second circuit 132 through the conductive layer 122 and the another conductive layer 113 in sequence, and the first circuit 131 and the second circuit 132 are electrically connected to generate a trigger signal.

In summary, in the above embodiments of the present invention, in the pressing structure of the input device, the dome member has conductivity and elasticity, the trigger member is disposed at the center of the dome member and has electrical insulation and flexibility, and the trigger member has a conductive layer facing the circuit board. Therefore, when the dome member is pressed, the conducting layer of the trigger member can be smoothly abutted to the trigger circuit of the circuit board to generate a trigger signal, and the trigger member has flexibility to effectively reduce the impact force between the components while triggering, so that the noise generated by the mutual impact of the components is reduced. At the same time, the dome member accumulates elastic force due to the pressing deformation.

In contrast, when the dome is not pressed, the accumulated elastic force of the dome can drive the trigger to reset smoothly and away from the circuit board, i.e. for the pressing structure, the dome can reset smoothly only by the aid of the dome without the aid of other components, so that the pressing structure is simplified, has a short pressing stroke, and can avoid the situation that the components cannot be thinned due to stacking.

In other words, compared to the dome (i.e. rubber dome) with a simple pressing structure made of rubber elastic material in the prior art, the dome can achieve the silencing effect, but cannot be thinned effectively, and does not contribute to reducing the pressing stroke. On the contrary, compared with the dome (i.e. metal dome) with a pressing structure made of metal elastic sheet, the dome can effectively reduce the pressing stroke, but the noise generated by the impact of the member in the pressing process is inevitable. Therefore, the invention can effectively improve the situation by separating the trigger and the dome into different materials and particularly embedding the trigger in the center of the dome by the embedding and injecting process, thereby having the low pressing stroke and the silencing effect.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.