TW201417130A - A thin press type key structure - Google Patents

Abstract

A thin press type key structure, comprising: an elastic conductor having a salient pattern on an external surface thereof, the salient pattern being arranged in layers symmetrical with respect to a central point of the elastic conductor; and a conductive layer arranged under the elastic conductor and provided with a conductive material with a pattern on a surface thereof there being a plurality of conductive paths between the salient pattern and the pattern; wherein a distance between an inner layer of the salient pattern and the conductive layer is shorter than a distance between an outer layer of the salient pattern and the conductive layer; wherein a value of an exerted force is generated when a force is exerted to the elastic conductor; wherein when an amount of displacement caused by the value of the exerted force is lower than a setting value, no current will pass between the elastic conductor and the conductive layer; and wherein when the amount of displacement caused by the value of the exerted force is greater than the setting value, the plurality of conductive paths between the elastic conductor and the conductive layer will be conducted in a multi-stage manner according to the amount of displacement caused by the depressing force.

Description

Thin pressure button structure

The present invention relates to a thin pressure type button structure, and more particularly to a thin pressure type button structure having a sensing button force.

At present, portable tablet PCs are popular, and the input interface and user habits have also changed. The input method uses capacitive screens and text input, but the convenience of use is still inferior to that of today's notebook computers. The keyboard is convenient, and it has the characteristics of the palm of the hand to play the button without triggering and the quick pressing reaction. It is also a problem that the capacitive keyboard is difficult to overcome, but the weight of the scissor-type keyboard applied to the tablet computer still cannot satisfy the tablet. Lightweight and easy to carry; however, the capacitive keyboard can achieve a thinner design, but in terms of use, it can not provide the user with a better pressing touch, and in the pre-pressing behavior, that is, the user rests the finger When the capacitor is the surface of the keyboard, it is prone to accidental touch, so the conventional technique still has defects in practical application, and needs to be improved.

In order to solve the above disadvantages, the present invention uses a carbon film button corresponding to the stage trigger structure to provide a user with a preload behavior without triggering when using the keyboard, and detecting the user through a phased trigger impedance change. Pressing the pressure track and speed, in turn, increases the functionality of the keyboard input. In addition, through the design of the elastic body structure, the user has a clear pressing touch for each stage of the triggering when pressing, and the keyboard structure is reduced to achieve lightness. Quantitative, thin design.

In view of the above problems in the prior art, the present invention provides a thin pressure type button structure including an elastic conductor and a conductive layer. When the elastic conductor is pressed to generate a force application value, the force application value does not reach a set value. When the elastic conductor forms an open circuit with the conductive layer, and the applied force value is greater than the set value, the elastic conductive body and the conductive layer are in a downward displacement amount when pressed, so as to conduct different conductive paths. Conduction.

The thin pressure type button structure for achieving the above object comprises: an elastic conductor having a convex pattern on a lower surface thereof, wherein the convex pattern is arranged in a symmetrical layer shape at a center point of the elastic conductor; a conductive layer disposed under the elastic conductor, the conductive layer is provided with a conductive material, and the conductive material has a pattern, and the convex pattern of the elastic conductor and the pattern of the conductive layer have a plurality of conductive paths The distance from the inner layer of the protruding pattern to the conductive layer is smaller than the distance from the outer layer of the protruding pattern to the conductive layer; wherein a force applied to the elastic conductor generates a force value, and the displacement is generated by the applied force value When the amount does not reach a set value, the elastic conductor forms an open circuit with the conductive layer, and when the displacement amount generated by the applied force is greater than the set value, the elastic conductor and the conductive layer are displaced according to the pressed amount. The size of the conductive path is turned on in stages.

Preferably, the elastic conductive system is a carbon black rubber and has an arc shape, and the convex pattern of the elastic conductor comprises a plurality of concentric circles and concentric grooves.

Preferably, the conductive layer may be a printed circuit board or consist of a polyester film and the conductive material, and the conductive material may be printed on the printed material. On the surface of the polyester film, the conductive material may be a silver paste or a carbon film.

Preferably, the pattern of the conductive material of the conductive layer is two or more independent patterns.

Preferably, a resilient cap is disposed above the elastic conductor.

Preferably, there is a space between the keycap and the elastic conductor.

Preferably, the key cap and the elastic conductive system are formed by two-mode injection or in-mold injection molding.

A thin pressure type button structure that achieves the above other object, comprising: an elastic body having a convex pattern, the convex pattern being arranged in a symmetrical layer shape at a center point of the elastic body; a conductive layer disposed under the elastic body, a first conductive material disposed under the first conductive layer, the first conductive material being two or more independent patterns; a spacer layer disposed under the first conductive layer And a hole having a hole corresponding to the first conductive material of the first conductive layer; and a second conductive layer disposed under the spacer layer and having a second conductive substance disposed thereon to correspond to the first a first conductive material of the conductive layer, the second conductive material is a single independent pattern; a distance from the inner layer of the convex pattern to the first conductive layer is smaller than a distance from the outer layer of the convex pattern to the first conductive layer; When a different force is applied to the elastomer, the first conductive material of the first conductive layer and the second conductive material of the second conductive layer have different contact areas, and are converted by the displacement generated when pressed. Corresponding Pressure change in impedance value.

Preferably, the elastic system is a rubber and has a circular arc shape, and the convex pattern of the elastic body comprises a plurality of concentric circles and concentric circular grooves.

Preferably, the first conductive layer is composed of a polyester film and the first conductive material, and the first conductive material can be printed on the polyester film by printing. The first conductive material may be a silver paste or a carbon film on the surface of the film.

Preferably, the spacer layer is a polyester film for controlling the distance between the first conductive layer and the second conductive layer.

Preferably, the second conductive layer is composed of a polyester film and the second conductive material, and the second conductive material may be carbon black rubber.

Preferably, a key cap is arranged above the elastic body.

Preferably, there is a space between the keycap and the elastic body.

Preferably, the keycap and the elastic system are formed by two-mode injection or in-mold injection molding.

The technical features, contents, and advantages of the present invention, as well as the advantages thereof, can be understood by the present inventors, and the present invention will be described in detail with reference to the accompanying drawings. The subject matter is only for the purpose of illustration and description. It is not intended to be a true proportion and precise configuration after the implementation of the present invention. Therefore, the scope and configuration relationship of the attached drawings should not be interpreted or limited. First described.

Referring to FIG. 1A and FIG. 1B, respectively, a top perspective exploded view and a bottom exploded perspective view of the first embodiment of the thin pressure type button structure of the present invention are shown. In the first embodiment, the thin pressure type button structure 1 of the present invention comprises: a keycap 2; an elastic conductor 3 disposed under the keycap 2, the elastic conductor 3 having a convex shape on the outer surface. The embossed pattern is arranged in a symmetrical layer at a center point of the elastic conductor 3; and a conductive layer 4 is disposed under the elastic conductor 3, and a conductive substance 5 is disposed on the conductive layer 4, and the conductive layer 4 The conductive material 5 has a pattern and the convexity of the elastic conductor 3 The pattern and the pattern of the conductive layer 5 have a plurality of conductive paths. The elastic conductor 3 is a carbon black rubber, and looks like an arc-shaped body from the appearance. The convex pattern of the elastic conductor 3 includes a plurality of concentric circles and concentric grooves, and the more rounded the center The outer convex layer protrudes outwardly. Therefore, the distance from the inner layer of the convex pattern to the conductive layer 5 is smaller than the distance from the outer layer of the convex pattern to the conductive layer 5. The conductive layer 4 can be a printed circuit board (PCB) or composed of a polyester film (PET) and the conductive material 5, and the conductive material 5 can be printed on the surface of the polyester film by printing, the conductive material 5 It can be a silver paste or a carbon film. Further, the pattern of the conductive material 5 is two or more independent patterns: a pattern 51 and a pattern 52, wherein the right side of the pattern 51 has a C shape, and the left side of the pattern 51 is a letter shape; the pattern 52 is a reverse The C-shape and the in-line shape are formed to intersect each other, wherein the inverse C-shape of the pattern 52 surrounds the C-shape of the pattern 51.

Referring to the second drawing, there is shown a side view of a first embodiment of a thin pressure type button structure of the present invention and a schematic plan view of the conductive material. The innermost small circle of the pattern 52 of the conductive material 5 is L1, the C-shape of the pattern 51 is L2, and the inverse C-shape of the pattern 52 is L3. Applying a force value (F) to the keycap 2, the elastic conductor 3 and the conductive layer 4 form an open circuit when the displacement amount generated by the applied force value does not reach a set value, and the force application value is When the generated displacement amount is greater than the set value, the elastic conductor 3 and the conductive layer 4 are electrically connected to different conductive paths in stages according to the magnitude of the applied force value. The details are as follows: In the present embodiment, when the keycap 2 is not pressed, the elastic conductor 3 and the center point L1 of the conductive material 5 abut each other, but since L1, L2 and L3 are not connected, the The elastic conductor 3 forms a break with the conductive layer 4 road. When the keycap 2 is pressed to generate a displacement amount, the elastic conductor 3 contacts the conductive material 5 on the conductive layer 4, that is, the elastic conductor 3 contacts L1 and L2, and the pattern 51 and the The graphic 52 is turned on. Moreover, when the keycap 2 is pressed to generate a larger displacement amount (that is, the keycap 2 is pressed down more), the elastic conductor 3 contacts the conductive material on the conductive layer 4. 5, that is, the elastic conductor 3 is in contact with L1, L2 and L3, and the pattern 51 is electrically connected to the pattern 52. When the different strengths are applied to the keycap 2, the conductive material 5 of the elastic conductor 3 and the conductive layer 4 may have different contact areas due to different displacement amounts, that is, between the pattern 51 and the pattern 52. Different impedances are generated, and the impedance (voltage) can be measured to determine the state of the button.

Please refer to the third to third H diagrams, wherein the third A to the third F diagrams show that the elastic conductor of the present invention is pressed under different urging forces to generate different displacement amounts and contact with the conductive layer. The third G map shows the relationship between the force and the displacement, and the third H graph shows the change of the displacement and the impedance when the different force is applied according to the present invention, and refers to the second diagram. Z0 represents that the elastic conductor 3 of the keycap 2 is not biased at this time, so that no downward displacement occurs, and the elastic conductor 3 does not simultaneously contact L1, L2 and L3 on the conductive layer 4, so L1, L2 In contact with L3, the elastic conductor 3 forms an open circuit with the conductive layer 4. When the force applied to the keycap 2 is lightly pressed, but the displacement Z1 generated by the biasing force still does not reach the set value, at this time, L1, L2 and L3 are still not connected, and the elastic conductor 3 and the elastic conductor 3 are The conductive layer 4 still forms an open circuit. When the displacement amount Z2 just reaches the set value of the displacement amount, the elastic conductor 3 simultaneously contacts L1 and L2 on the conductive layer 4, and at this time, L1 and L2 are turned on, and the impedance starts to change rapidly (can be regarded as the first stage trigger). . when When the displacement amount is Z3, it represents a change in the L2 contact area of the elastic conductor 3 on the conductive layer 4. When the displacement amount is Z4, it represents that the elastic conductor 3 is in full contact with the region of L1 and L2 on the conductive layer 4, and the elastic conductor 3 simultaneously contacts L1, L2 and L3 on the conductive layer 4. At this time, L1, L2 and L3 are turned on, and the impedance starts another sharp change (can be regarded as the second stage trigger). When the displacement amount Z5, the L3 contact area of the elastic conductor 3 on the conductive layer 4 changes. Please also refer to the third H diagram. When the displacement amount is Z2 and Z4, since the convex pattern structure of the elastic conductor 3 is deformed and collapsed due to pressing, the required pressing force is lowered, so that the user feels when pressing. To the touch of different triggering paragraphs.

Referring to FIG. 4A and FIG. 4B, respectively, a top perspective exploded view and a bottom exploded perspective view of a second embodiment of the thin pressure type button structure of the present invention are shown. In the second embodiment, the thin pressure type button structure 11 of the present invention comprises a key cap 12; an elastic body 13 is disposed under the keycap 12, and the elastic body 13 has a convex shape on the outer surface, and the convex body has a convex shape. The pattern is arranged in a symmetrical layer at the center of the elastic body 13; a first conductive layer 14 is disposed under the elastic body 13, and a first conductive material 15 is disposed under the first conductive layer 14 A conductive material 15 is two or more independent patterns; a spacer layer 16 is disposed under the first conductive layer 14 and has a hole 17 for corresponding to the first conductive material of the elastic body 13 and the first conductive layer 14 And a second conductive layer 18 disposed under the spacer layer 16 and having a second conductive material 19 thereon to correspond to the first conductive material 15 of the first conductive layer 14, the second conductive material 19 It is a single independent graphic.

The elastic body 13 is a rubber and looks like an arc-shaped body from the appearance, and the convex pattern of the elastic body 13 includes a plurality of concentric circles and concentric circles. The groove is more outwardly convex toward the center of the circle. Therefore, the distance from the inner layer of the convex pattern to the first conductive layer 14 is smaller than the distance from the outer layer of the protruding pattern to the first conductive layer 14. The first conductive layer 14 is composed of a polyester film (PET) and the first conductive material 15. The first conductive material 15 can be printed on the surface of the polyester film by printing. The first conductive material 15 can be Silver paste or carbon film. Further, the pattern of the conductive material 15 is two or more independent patterns: a pattern 151 and a pattern 152, wherein the right side of the pattern 151 has a C shape, and the left side of the pattern 151 has a shape; the pattern 152 is a reverse The C-shape and the in-line shape are formed to intersect each other, wherein the inverse C-shape of the graphic 152 surrounds the C-shape of the graphic 151. Preferably, the spacer layer 16 is a polyester film for controlling the distance between the first conductive layer 14 and the second conductive layer 18. The second conductive layer 18 is composed of a polyester film (PET) and the second conductive material 19, and the second conductive material 19 may be a carbon black rubber.

The fifth drawing shows a side view of a second embodiment of the thin pressure type button structure of the present invention. In the second embodiment, when a different force is applied to the keycap 12, the elastic body 13 presses the first conductive layer 14, and then the first conductive material 15 of the first conductive layer 14 also goes down. It moves and passes through the hole 17 of the spacer layer 16 to be in contact with the second conductive substance 19 of the second conductive layer 18. Wherein, different displacement amounts are generated according to the magnitude of the applied force, and the first conductive material 15 of the first conductive layer 14 and the second conductive material 19 of the second conductive layer 18 have different contact areas. Because of this, there will be different voltage impedances, so the amount of displacement generated by the different force applied can be converted into the corresponding voltage impedance change value.

Please refer to the sixth figure for showing another implementation of the keycap of the present invention. example. The keycap 2 of the first embodiment described above and the elastic conductor 3 are physically joined without a space. The keycap 12 of the second embodiment described above is physically joined to the elastomer 13 without a space. However, it is worth mentioning that another embodiment of the present invention may be that the keycap 22 and the elastic body 23 are partially coupled, that is, the keycap 22 and the elastic body 23 have a Space 24. The key cap and the elastic conductor (elastomer) of any of the above embodiments may be two independent components, which are connected to each other by fitting, snapping or bonding, or may be injected by using in-mold. Molding and other forming techniques are used for manufacturing.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

1, 11‧‧‧ Thin pressure button structure

2,12,22‧‧‧ keycaps

3‧‧‧Elastic conductor

4‧‧‧ Conductive layer

5‧‧‧Conducting materials

13, 23‧‧‧ Elastomers

14‧‧‧First conductive layer

15‧‧‧First conductive substance

16‧‧‧ spacer

17‧‧‧ hole

18‧‧‧Second conductive layer

19‧‧‧Second conductive substance

24‧‧‧ Space

51, 52, 151, 152‧‧‧ graphics

The first A is a top perspective exploded view of the first embodiment of the thin pressure type button structure of the present invention.

The first B diagram shows a perspective exploded view of the first embodiment of the thin pressure type button structure of the present invention.

The second drawing shows a side view of a first embodiment of the thin pressure type button structure of the present invention and a schematic plan view of the conductive material.

3A to 3F are schematic views showing that the elastic conductor of the present invention is pressed down and in contact with the conductive layer according to different urging forces; the third G diagram shows a relationship between force and displacement; The H diagram shows the impedance change diagram for different force applied by the present invention.

The fourth A diagram shows the second implementation of the thin pressure type button structure of the present invention. For example, the stereoscopic exploded view is viewed.

Fig. 4B is a perspective exploded view showing the second embodiment of the thin pressure type button structure of the present invention.

The fifth drawing shows a side view of a second embodiment of the thin pressure type button structure of the present invention.

The sixth figure shows another embodiment of the keycap of the present invention.

1‧‧‧Thin pressure button structure

2‧‧‧Key Cap

3‧‧‧Elastic conductor

4‧‧‧ Conductive layer

5‧‧‧Conducting materials

51, 52‧‧‧ graphics

F‧‧‧ force value

Claims (15)

A thin pressure type button structure comprising: an elastic conductive body having a convex pattern, the convex pattern is arranged in a symmetrical layer shape at a center point of the elastic conductor; and a conductive layer, The conductive layer is provided with a conductive material on the surface of the conductive layer, and the conductive material has a pattern, and the convex pattern of the elastic conductive body and the pattern of the conductive layer have a plurality of conductive paths; the protruding The distance from the inner layer of the pattern to the conductive layer is less than the distance from the outer layer of the protruding pattern to the conductive layer; wherein a force applied to the elastic conductor generates a force application value, and the displacement generated by the applied force value does not reach When a set value is formed, the elastic conductor forms an open circuit with the conductive layer, and when the displacement amount generated by the applied force value is greater than the set value, the elastic conductive body and the conductive layer are displaced according to the amount of displacement , different conductive paths are turned on in stages. The thin pressure type button structure according to claim 1, wherein the elastic conductive system is a carbon black rubber and has an arc shape, and the convex pattern of the elastic conductor comprises a plurality of concentric circles and concentric grooves. . The thin pressure type button structure according to claim 1, wherein the conductive layer may be a printed circuit board or a polyester film and the conductive material, and the conductive material may be printed on the poly On the surface of the ester film, the conductive material may be a silver paste or a carbon film. The thin pressure type button structure according to claim 1, wherein the conductive material of the conductive layer has two or more independent patterns. The thin pressure type button structure according to claim 1, wherein a keycap is disposed above the elastic conductor. The thin pressure type button structure according to claim 5, wherein the key cap and the elastic conductor have a space. The thin pressure type button structure according to claim 5, wherein the key cap and the elastic conductive system are formed by two-mode injection or in-mold injection molding. A thin pressure type button structure comprises: an elastic body having a convex pattern, wherein the convex pattern is arranged in a symmetrical layer shape at a center point of the elastic body; a first conductive layer is disposed on the Under the elastic body, a first conductive material is disposed under the first conductive layer, and the first conductive material is two or more independent patterns; a spacer layer is disposed under the first conductive layer and has a hole Corresponding to the first conductive material of the first conductive layer; and a second conductive layer disposed under the spacer layer, and having a second conductive material disposed thereon to correspond to the first conductive layer a conductive material, the second conductive material is a single independent pattern; a distance from the inner layer of the convex pattern to the first conductive layer is smaller than a distance from the outer layer of the convex pattern to the first conductive layer; When the force is applied to the elastomer, the first conductive material of the first conductive layer and the second conductive material of the second conductive layer have different contact areas, and are converted into corresponding voltage impedance changes by the displacement generated when pressed. value Thin pressure button junction as described in claim 8 The elastic system is a rubber and has a circular arc shape, and the convex pattern of the elastic body comprises a plurality of concentric circles and concentric circular grooves. The thin pressure type button structure according to claim 8, wherein the first conductive layer is composed of a polyester film and the first conductive material, and the first conductive material can be printed on the polyester by printing. On the surface of the film, the first conductive material may be a silver paste or a carbon film. The thin pressure type button structure according to claim 8, wherein the spacer layer is a polyester film for controlling the distance between the first conductive layer and the second conductive layer. The thin pressure type button structure according to claim 8, wherein the second conductive layer is composed of a polyester film and the second conductive material, and the second conductive material may be carbon black rubber. The thin pressure type button structure according to claim 8, wherein a key cap is disposed above the elastic body. The thin pressure type button structure according to claim 13, wherein the key cap and the elastic body have a space. The thin pressure type button structure according to claim 13, wherein the key cap and the elastic system are formed by two-mode injection or in-mold injection molding.