CN104750259B - Cover structure, input device and cover structure manufacturing method - Google Patents

Abstract

The present invention discloses a covering structure, which comprises a bottom covering layer, a top covering layer and a thermoplastic material layer. The thermoplastic material layer is stacked between the bottom covering layer and the top covering layer. The thermoplastic material layer comprises a first thermoplastic material layer portion and a second thermoplastic material layer portion connected. The first thermoplastic material layer portion has a first thickness. The second thermoplastic material layer portion has a second thickness. The first thickness is greater than the thickness of the top covering layer. The first thickness is 4 to 7 times the second thickness. The present invention also discloses an input device using the covering structure and a method for manufacturing the covering structure.

Description

Overlay structure, input device and method for manufacturing the overlay structure

technical field

The invention relates to a covering structure, an input device using the covering structure and a manufacturing method of the covering structure.

Background technique

Although tablet PCs have become more and more popular in recent years, the keyboard (or mouse) is still an important input device for inputting characters, symbols or numbers in terms of current usage habits of personal computers. Therefore, at present, some operators have introduced a thin touch keyboard specially used for tablet computers, which can also be used as a protective cover for tablet computers. In order to achieve a thinner appearance, the touch keyboard uses a force sensitive resistor (Force Sensitive Resistor, FSR) as a component for sensing input signals, and covers the surface with a covering layer for the user's finger to touch.

However, the touch keyboard cannot provide the user with a pressing feeling similar to that provided by a traditional keyboard, so the user cannot clearly know whether the key switch has been successfully triggered through the tactile feeling when pressing. Moreover, the covering layer of the touch keyboard is too flat, and it is impossible for the user to clearly distinguish whether the button is pressed or not. In order to solve this problem, another company further arranges a pressing spacer on the covering layer of the touch keyboard corresponding to each key, in order to simulate the pressing feeling provided by the traditional keyboard. However, the pressing feeling provided by the pressing spacer is not only still not comparable to that of the traditional keyboard, but also must face the problem of alignment accuracy when the pressing spacer is arranged on the cover layer, so its manufacturing cost will also be affected by the additional pressing spacer. slice and improve.

In addition, in the manufacturing process of the existing pressing pads, the glue needs to be injected into the mold to form the shape of the corresponding button. After the glue is hardened and formed, it is then adhered to the sheet body. The overall process is time-consuming and complicated. .

Therefore, proposing an input device with a better pressing feel, and the covering layer of the input device is manufactured at a low cost and has a fast manufacturing process, which is one of the projects that the industry is eager to invest in R&D resources for research.

Contents of the invention

The present invention provides a covering structure comprising a bottom covering layer, a top covering layer and a layer of thermoplastic material. The thermoplastic material layer is stacked between the bottom cladding layer and the top cladding layer. The layer of thermoplastic material comprises a connected portion of the first layer of thermoplastic material and a portion of the second layer of thermoplastic material. The first layer portion of thermoplastic material has a first thickness. The second layer portion of thermoplastic material has a second thickness. The first thickness is greater than the thickness of the top cladding layer. The first thickness is 4-7 times of the second thickness.

In one embodiment of the present invention, the above-mentioned bottom cladding layer includes a connected first cloth layer portion and a second cloth layer portion. The first layer of thermoplastic material is partially laminated between the first cloth layer portion and the top cover layer. The second thermoplastic material layer is partially laminated between the second cloth layer portion and the top cladding layer. The first layer portion has a third thickness. The second cloth layer portion has a fourth thickness. The third thickness is 1.2-1.7 times of the fourth thickness.

In one embodiment of the present invention, the sum of the first thickness, the third thickness and the thickness of the top cladding layer is 1.5 to 2.3 times the sum of the second thickness, the fourth thickness and the thickness of the top cladding layer .

In one embodiment of the present invention, the above-mentioned covering structure further includes an adhesive layer. The adhesive layer is bonded between the top cladding layer and the thermoplastic material layer.

In one embodiment of the present invention, the material of the above-mentioned bottom coating layer includes nylon, and the material of the thermoplastic material layer includes polyurethane.

In one embodiment of the present invention, the above-mentioned bottom covering layer is a knitted fabric layer, the top covering layer is a leather layer, and the thermoplastic material layer is a foam layer.

The invention also provides an input device, which includes a keyboard module and a covering structure. The keyboard module includes multiple key units. The cover structure includes a bottom cladding layer, a top cladding layer and a layer of thermoplastic material. The bottom cover covers the attached keyboard module. The thermoplastic material layer is stacked between the bottom cladding layer and the top cladding layer. The thermoplastic material layer includes a plurality of first thermoplastic material layer portions and second thermoplastic material layer portions. The second layer of thermoplastic material is partially connected to the first layer of thermoplastic material. Each part of the first thermoplastic material layer corresponds to the area of the key unit. The second thermoplastic material layer part corresponds to the area outside the key unit. Each first layer portion of thermoplastic material has a first thickness. The second layer portion of thermoplastic material has a second thickness. The first thickness is greater than the thickness of the top cladding layer. The first thickness is 4-7 times of the second thickness.

In one embodiment of the present invention, the above-mentioned bottom cladding layer includes a plurality of first cloth layer parts and second cloth layer parts. The second layer portion is connected to the first layer portion. Each first thermoplastic material layer portion is laminated between the corresponding first cloth layer portion and the top cladding layer. The second thermoplastic material layer is partially laminated between the second cloth layer portion and the top cladding layer. Each first layer portion has a third thickness. The second cloth layer portion has a fourth thickness. The third thickness is 1.2-1.7 times of the fourth thickness.

In one embodiment of the present invention, each of the above-mentioned key units is a dome-type support key.

In one embodiment of the present invention, each of the above-mentioned key units is a scissor-type support key.

In one embodiment of the present invention, the above-mentioned keyboard module is a pressure-sensing resistive keyboard.

The present invention also provides a method for manufacturing a covering structure, which includes: providing a bottom cladding layer; laminating a thermoplastic material layer on the bottom cladding layer; heat-pressing the thermoplastic material layer, and then forming a first thermoplastic material that has not been heat-pressed. The material layer portion and the heat-pressed second thermoplastic material layer portion, wherein the first thermoplastic material layer portion has a first thickness, the second thermoplastic material layer portion has a second thickness, and the first thickness is the second thickness 4 to 7 times; and laminating a top cladding layer on the thermoplastic material layer, wherein the first thickness is greater than the thickness of the top cladding layer.

In one embodiment of the present invention, the above-mentioned step of providing the bottom cladding layer includes heat-pressing the bottom cladding layer, thereby forming a non-heat-pressed first cloth layer part and a heat-pressed second cloth layer part, wherein the first The thermoplastic material layer is partially laminated between the first cloth layer part and the top cladding layer, the second thermoplastic material layer is partially laminated between the second cloth layer part and the top cladding layer, and the first cloth layer part has The third thickness, the second cloth layer part has a fourth thickness, and the third thickness is 1.2-1.7 times of the fourth thickness.

In one embodiment of the present invention, the above-mentioned step of laminating the top cladding layer on the thermoplastic material layer further includes coating an adhesive layer on the thermoplastic material layer, so that the laminated top cladding layer and the thermal The layers of plastic material are bonded to each other.

In summary, the covering structure of the present invention is composed of a bottom cladding layer, a top cladding layer, and a thermoplastic material layer, and both the bottom cladding layer and the thermoplastic material layer can be formed with different thicknesses by hot pressing. Area. Wherein, the area where the thermal compression range between the bottom coating layer and the thermoplastic material layer is small or not hot-pressed (the thickness of the covering structure in this area is relatively thick) can correspond to the area of the key unit of the input device, and the bottom coating layer and the thermoplastic material layer The heat-pressed area of the thermoplastic material layer (where the thickness of the covering structure is relatively thin) may correspond to the area outside the key unit. In other words, the covering structure of the present invention can form a pressing portion with a clear structure in the area corresponding to the key unit only through a simple hot pressing process, so it can solve the problem of alignment accuracy faced when the conventional pressing spacer is arranged. In addition, the key unit used in the input device of the present invention is a dome-type support key or a scissor-type support key, so when the user presses the key unit through the cover structure, a better pressing feel can be obtained, and it can clearly Whether the switch corresponding to the button unit has been successfully triggered can be known through the tactile sensation when pressed.

Description of drawings

FIG. 1A is an exploded perspective view of an input device according to an embodiment of the present invention.

FIG. 1B is a perspective assembled view of the input device in FIG. 1A .

FIG. 2 is a cross-sectional view of the covering structure in FIG. 1A .

FIG. 3 is a partial cross-sectional view of the input device in FIG. 1B .

FIG. 4A is a partial cross-sectional view of the input device in FIG. 1A , where the key unit is not pressed.

FIG. 4B is another partial cross-sectional view of FIG. 4A , where the key unit has been pressed.

FIG. 5 is a partial cross-sectional view of a keyboard module and a cover structure according to another embodiment of the present invention.

FIG. 6 is a partial cross-sectional view of a keyboard module and a cover structure according to another embodiment of the present invention.

FIG. 7 is a flowchart of a manufacturing method of a covering structure according to an embodiment of the present invention.

Detailed ways

A number of implementations of the present invention will be disclosed below with the accompanying drawings. For the sake of clarity, many specific details will be described together in the following description. It should be understood, however, that these specific details should not be used to limit the invention. That is, in some embodiments of the invention, these specific details are not necessary. In addition, for the sake of simplification of the drawings, some conventional structures and elements will be shown in a simple and schematic manner in the drawings.

Please refer to FIG. 1A , FIG. 1B and FIG. 2 . FIG. 1A is an exploded perspective view of an input device 1 according to an embodiment of the present invention. FIG. 1B is a perspective assembled view of the input device 1 in FIG. 1A . FIG. 2 is a cross-sectional view of the covering structure 12 in FIG. 1A .

As shown in FIG. 1A to FIG. 2 , in this embodiment, the input device 1 includes a keyboard module 10 and a cover structure 12 . The keyboard module 10 of the input device 1 includes a plurality of key units 102 . The cover structure 12 of the input device 1 includes a bottom cover layer 120 , a top cover layer 122 and a thermoplastic material layer 124 . In this embodiment, the bottom covering layer 120 may be a knitted fabric layer, the top covering layer 122 may be a leather layer, and the thermoplastic material layer 124 may be a foam layer. The bottom covering layer 120 of the covering structure 12 covers and attaches the keyboard module 10 . The thermoplastic material layer 124 of the covering structure 12 is laminated between the bottom cladding layer 120 and the top cladding layer 122 . The thermoplastic material layer 124 of the covering structure 12 comprises a plurality of first thermoplastic material layer portions 124a (only one is shown in FIG. 2 ) and a second thermoplastic material layer portion 124b. The second thermoplastic material layer portion 124b of the thermoplastic material layer 124 is connected to the first thermoplastic material layer portion 124a. Each first thermoplastic material layer portion 124 a of the thermoplastic material layer 124 corresponds to an area of the key unit 102 respectively. The second thermoplastic material layer portion 124b of the thermoplastic material layer 124 corresponds to the area outside the key unit 102 . Each first thermoplastic material layer portion 124a of the thermoplastic material layer 124 has a first thickness T1. The second thermoplastic material layer portion 124b has a second thickness T2. The first thickness T1 is greater than the thickness of the top cladding layer 122 . The first thickness T1 is 4-7 times of the second thickness T2.

In this embodiment, the thermoplastic material layer 124 of the covering structure 12 can be formed by hot pressing to form a first thermoplastic material layer portion 124a having a first thickness T1 and a second thermoplastic material layer portion 124b having a second thickness T2 , wherein the first thermoplastic material layer part 124a is a part that is not hot-pressed or not, and the second thermoplastic material layer part 124b is a part that is hot-pressed. Therefore, the first thermoplastic material layer portion 124a, which has a smaller heat-pressing range or has not been heat-pressed and has a larger first thickness T1, can correspond to the area of the key unit 102 (that is, directly above the key unit 102) as The part of the covering structure 12 that is pressed by the user, and the second thermoplastic material layer part 124b that is hot-pressed and has a smaller second thickness T2, can correspond to the area outside the key unit 102 and serve as the covering structure 12 to prevent dirt. For the portion entering the gap between the key units 102 , the above-mentioned thermal compression range is used to represent the difference in thermal compression degree of the first thermoplastic material layer portion 124 a relative to the second thermoplastic material layer portion 124 b.

As shown in FIG. 2 , in this embodiment, the bottom cladding layer 120 of the covering structure 12 includes a plurality of first cloth layer portions 120 a and second cloth layer portions 120 b. The second cloth layer portion 120b of the bottom cladding layer 120 is connected to the first cloth layer portion 120a. Each first thermoplastic material layer portion 124a of the thermoplastic material layer 124 is laminated between the corresponding first fabric layer portion 120a and the top cladding layer 122 . The second thermoplastic material layer portion 124b of the thermoplastic material layer 124 is laminated between the second cloth layer portion 120b of the bottom cladding layer 120 and the top cladding layer 122 (that is, the first layer of the bottom cladding layer 120 The cloth layer part 120a corresponds to the area of the key unit 102 respectively, and the second cloth layer part 120b of the bottom coating layer 120 corresponds to the area outside the key unit 102). Each first cloth layer portion 120a of the bottom cladding layer 120 has a third thickness T3. The second cloth layer portion 120b of the bottom cladding layer 120 has a fourth thickness T4. The third thickness T3 is 1.2˜1.7 times of the fourth thickness T4.

In this embodiment, the bottom cladding layer 120 of the covering structure 12 can also be formed by hot pressing to form the first cloth layer part 120a with the third thickness T3 and the second cloth layer part 120b with the fourth thickness T4, wherein the first cloth layer part 120b has the fourth thickness T4. The first cloth layer part 120a is a part that is not hot-pressed or not, and the second cloth layer part 120b is a part that is hot-pressed. Therefore, the first cloth layer portion 120a, which has a relatively small thermal compression range or has not been thermally compressed and has a relatively large third thickness T3, can be used as a covering structure corresponding to the area of the key unit 102 (ie directly above the key unit 102) 12 is the part for the user to press, and the second cloth layer part 120b that is hot-pressed and has a smaller fourth thickness T4 can correspond to the area other than the key unit 102 and serve as the covering structure 12 to prevent dirt from entering the key unit 102 part of the gap between.

In this embodiment, the sum of the first thickness T1 of the first thermoplastic material layer part 124a, the third thickness T3 of the first cloth layer part 120a and the thickness of the top cladding layer 122 is the second thermoplastic material layer part The second thickness T2 of the layer 124 b , the fourth thickness T4 of the second cloth layer portion 120 b and the thickness of the top cladding layer 122 are 1.5 to 2.3 times the sum of them. It can be seen that the covering structure 12 of the present invention can form a pressing portion with a clear structure in the area corresponding to the key unit 102 (because of its thicker thickness) only through a simple hot pressing procedure, so it can solve the problem of the existing pressing pads. The problem of alignment accuracy that needs to be faced.

In addition, it should be noted that, in order to make the top cladding layer 122 and the thermoplastic material layer 124 have a better bonding effect, the covering structure 12 of this embodiment further includes an adhesive layer 126 (as shown in FIG. 2 ), It is bonded between the top cladding layer 122 and the thermoplastic material layer 124 , so that the top cladding layer 122 and the thermoplastic material layer 124 can be more firmly bonded and not easily separated.

Please refer to FIG. 3 , FIG. 4A and FIG. 4B . FIG. 3 is a partial cross-sectional view of the input device 1 in FIG. 1B . FIG. 4A is a partial cross-sectional view of the input device 1 in FIG. 1A , where the key unit 102 is not pressed. FIG. 4B is another partial cross-sectional view of FIG. 4A , where the button unit 102 has been pressed. In order to simplify the drawing, the covering structure 12 in FIG. 3 omits the drawing of the adhesive layer 126 in FIG. 2 .

As shown in FIGS. 3 to 4B , in this embodiment, the keyboard module 10 of the input device 1 further includes a substrate 100 . A plurality of switches 100a are provided on the substrate 100 . Each switch 100a is disposed under the corresponding key unit 102 . Each key unit 102 is a dome-type support key, which includes a connected elastic member 102a and a keycap 102b. In this embodiment, the elastic member 102a can be a metal dome, which is not used in practice. limit. The elastic member 102a of each key unit 102 is disposed on the substrate 100 and located under the corresponding keycap 102b.

According to the above structural configuration, when the user presses the obviously protruding part of the covering structure 12 (that is, the part corresponding to the first thermoplastic material layer part 124a and the first cloth layer part 120a), the corresponding key of the key unit 102 will The cap 102b will be pressed downward, and the trigger block 102b1 inside the keycap 102b will press the elastic member 102a to deform, and finally the deformed elastic member 102a triggers the switch 100a to generate a signal corresponding to the key unit 102 . In addition, the bottom of the covering structure 12 has a plurality of bonding areas 128 (as shown in FIGS. 4A and 4B ), respectively corresponding to the key caps 102 b of the key unit 102 . As can be seen from FIG. 2 , each adhesive region 128 is located between the corresponding first cloth layer portion 120 a and the corresponding keycap 102 b. In this way, the covering structure 12 and the key unit 102 can be firmly fixed to each other without horizontal displacement.

It should be noted that the bottom cladding layer 120 , the top cladding layer 122 and the thermoplastic material layer 124 of the covering structure 12 all have certain ductility. In order not to cause the adjacent key unit 102 to be pulled by the cover structure 12 when a certain key unit 102 is pressed and cause false touches, the area of each adhesive region 128 can be smaller than the corresponding first cloth layer part 120a The area of the corresponding keycap 102b. That is to say, by reducing the area of the bonding area 128 , the area of the covering structure 12 not bonded to the keycap 102 b can be increased. Therefore, the freely extensible parts of the covering structure 12 are increased, so that the unit deformation amount is not too large to cause the above-mentioned problem of pulling the adjacent key units 102 . For example, the area of each adhesive region 128 is 1/8-1/9 times the area of the corresponding first cloth layer part 120a and the area of the corresponding keycap 102b, but the present invention does not limit.

In this embodiment, the material of the bottom coating layer 120 includes nylon, and the material of the thermoplastic material layer 124 includes polyurethane, but the invention is not limited thereto.

Please refer to FIG. 5 , which is a partial cross-sectional view of the keyboard module 30 and the covering structure 1212 according to another embodiment of the present invention. In order to simplify the drawing, the covering structure 1212 in FIG. 5 omits the drawing of the adhesive layer 126 in FIG. 2 .

As shown in FIG. 5 , in this embodiment, the keyboard module 30 of the input device 1 further includes a substrate 100 . A plurality of switches 100a are provided on the substrate 100 . Each switch 100a is disposed under the corresponding key unit 302 . Each key unit 302 is a scissors support type key, which includes a scissors support structure 302a, a keycap 302b and an elastic member 302c. The scissor-like supporting structure 302 a of each key unit 302 is pivotally disposed between the substrate 100 and the keycap 302 b, so as to guide the keycap 302 b to move toward or away from the substrate 100 . In this embodiment, the elastic member 302c can be a rubber dome, but it is not limited thereto in practice. The elastic member 302c of each key unit 302 is disposed between the substrate 100 and the keycap 302b, and is used to return the pressed keycap 302b to an initial unpressed position. The covering structure 12 covers and attaches to the keyboard module 30 . The covering structure 12 covers and attaches to the keyboard module 30 . The first cloth layer part 120a of the bottom cover layer 120 and the first thermoplastic material layer part 124a of the thermoplastic material layer 124 correspond to the area of the key unit 302, while the second cloth layer part 120b of the bottom cover layer 120 is in contact with the heat The second thermoplastic material layer portion 124b of the plastic material layer 124 corresponds to the area outside the key unit 302 .

According to the above structural configuration, when the user presses the obviously protruding part of the covering structure 12 (that is, the part corresponding to the first thermoplastic material layer part 124a and the first cloth layer part 120a), the corresponding key of the key unit 302 will The cap 302b will be pressed downwards, and the keycap 302b will press the elastic member 102a to deform, and finally the deformed elastic member 102a triggers the switch 100a to generate a signal corresponding to the key unit 302 .

Please refer to FIG. 6 , which is a partial cross-sectional view of the keyboard module 50 and the cover structure 12 according to another embodiment of the present invention. In order to simplify the drawing, the covering structure 1212 in FIG. 6 omits the drawing of the adhesive layer 126 in FIG. 2 .

As shown in FIG. 6 , in this embodiment, the keyboard module 50 is a pressure-sensing resistive keyboard, and it includes a pressure-sensing resistor substrate 502 . According to this structural configuration, when the user presses the obviously protruding part of the covering structure 12 (that is, the part corresponding to the first thermoplastic material layer part 124a and the first cloth layer part 120a), the pressure-sensitive resistor substrate 502 will be pressed according to the covering structure. The corresponding signal is generated based on the position of the obviously protruding part on the structure 12 .

Please refer to FIG. 7 , which is a flowchart of a method for manufacturing the covering structure 12 according to an embodiment of the present invention.

As shown in FIG. 7 , with reference to FIG. 3 and FIG. 4A and FIG. 4B , in this embodiment, the method for manufacturing the cover structure 12 includes steps S100 - S110 .

Step S100 : providing a bottom cladding layer 120 .

Step S102 : hot pressing the bottom cladding layer 120 to form a non-hot pressed first cloth layer portion 120 a and a hot pressed second cloth layer portion 120 b.

It should be noted here that, in practical applications, the above step S102 can also perform hot pressing on the first cloth layer part 120a at the same time, but the hot pressing range is smaller than that of the second cloth layer part 120b.

Step S104 : laminating the thermoplastic material layer 124 on the bottom cladding layer 120 .

Step S106 : heat-press the thermoplastic material layer 124 to form a non-heat-pressed first thermoplastic material layer portion 124 a and a heat-pressed second thermoplastic material layer portion 124 b.

It should be noted here that, in practical applications, the above step S106 may also perform hot pressing on the first thermoplastic material layer part 124a at the same time, but the hot pressing range is smaller than that of the second thermoplastic material layer part 124b.

Step S108 : coating the adhesive layer 126 on the thermoplastic material layer 124 .

Step S110 : laminating the top cladding layer 122 on the thermoplastic material layer 124 .

Through the above steps S100 - S110 , the bottom cladding layer 120 , the thermoplastic material layer 124 and the top cladding layer 122 can be laminated to form the covering structure 12 of the present invention.

From the above detailed description of the specific embodiments of the present invention, it can be clearly seen that the covering structure of the present invention is formed by laminating the bottom cladding layer, the top cladding layer and the thermoplastic material layer, and the bottom cladding layer and the The thermoplastic material layers can be formed into regions with different thicknesses by hot pressing. Wherein, the bottom coating layer and the thermoplastic material layer have a small heat-compression range or the area that has not been heat-pressed (the thickness of the covering structure in this area is thicker) can correspond to the area of the key unit of the input device, and the bottom coating layer and the thermoplastic material layer The heat-pressed area of the thermoplastic material layer (where the thickness of the covering structure is relatively thin) may correspond to the area outside the key unit. In other words, the covering structure of the present invention can form a pressing portion with a clear structure in the area corresponding to the key unit only through a simple hot pressing process, so it can solve the problem of alignment accuracy faced when the conventional pressing spacer is arranged. In addition, the key unit used in the input device of the present invention is a dome-type support key or a scissor-type support key, so when the user presses the key unit through the cover structure, a better pressing feel can be obtained, and it can clearly Whether the switch corresponding to the button unit has been successfully triggered can be known through the tactile sensation when pressed.

Although the present invention has been disclosed above in terms of implementation, it is not intended to limit the present invention. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope should be determined by what is defined in the claims.

Claims (20)

1. a kind of overlay structure applied to Keysheet module, which is characterized in that include：

Bottom clad；

Push up clad；And

Layer of thermoplastic material is superimposed between above-mentioned bottom clad and above-mentioned top clad, which includes to be connected First thermoplastic material layer segment and the second thermoplastic material layer segment, the first thermoplastic material layer segment have first thickness, should Second thermoplastic material layer segment has a second thickness, and the wherein first thickness is more than the thickness of above-mentioned top clad, and this One thickness is 4~7 times of the second thickness, and wherein the first thermoplastic material layer segment corresponds to the push-button unit of the Keysheet module Region, the second thermoplastic material layer segment correspond to the push-button unit other than region.

2. overlay structure as described in claim 1, which is characterized in that the bottom clad includes the first carcass portion being connected And second carcass portion, the first thermoplastic material layer segment be superimposed on first carcass portion and the top clad it Between, the second thermoplastic material layer segment is superimposed between second carcass portion and the top clad, the first layer of cloth portion Dividing has third thickness, which has the 4th thickness, and 1.2 that the third thickness is the 4th thickness~ 1.7 again.

3. overlay structure as claimed in claim 2, which is characterized in that the first thickness, the third thickness and the top The summation of the thickness of clad is the second thickness, the 4th thickness and the 1.5 of the summation of the thickness of the top clad ~2.3 times.

4. overlay structure as described in claim 1, which is characterized in that also include glue-line, which is bonded in the top cladding Between layer and the layer of thermoplastic material.

5. overlay structure as described in claim 1, which is characterized in that the material of the bottom clad includes nylon, and institute The material for stating layer of thermoplastic material includes polyurethane.

6. overlay structure as described in claim 1, which is characterized in that the bottom clad is knitting layer of cloth, the top cladding Layer is leather layer, and the layer of thermoplastic material is foaming layer.

7. a kind of input unit, which is characterized in that include：

Keysheet module, it includes multiple push-button units；And

Overlay structure, it includes：

Bottom clad covers and attaches above-mentioned Keysheet module；

Push up clad；And

Layer of thermoplastic material is superimposed between above-mentioned bottom clad and above-mentioned top clad, which includes multiple the One thermoplastic material layer segment and the second thermoplastic material layer segment, the second thermoplastic material layer segment and these above-mentioned first thermoplastics Layer material sections are connected, each these above-mentioned the first thermoplastic material layer segment corresponds respectively to the area of these above-mentioned push-button units Domain, the second thermoplastic material layer segment correspond to the region other than these above-mentioned push-button units, each these above-mentioned first heat There is moulding material layer segment first thickness, the second thermoplastic material layer segment there is second thickness, the first thickness to be more than upper The thickness of top clad is stated, and 4~7 times that the first thickness is the second thickness.

8. input unit as claimed in claim 7, which is characterized in that the bottom clad include multiple first carcass portions with And second carcass portion, second carcass portion are connected with these above-mentioned first carcass portions, each these described first heat Moulding material layer segment is superimposed between corresponding first carcass portion and the top clad, second layer of thermoplastic material Part is superimposed between second carcass portion and the top clad, each these above-mentioned first carcass portion has third Thickness, second carcass portion have the 4th thickness, and 1.2~1.7 times that the third thickness is the 4th thickness.

9. input unit as claimed in claim 8, which is characterized in that the first thickness, the third thickness and the top The summation of the thickness of clad is the second thickness, the 4th thickness and the 1.5 of the summation of the thickness of the top clad ~2.3 times.

10. input unit as claimed in claim 7, which is characterized in that the overlay structure also includes glue-line, glue-line bonding Between the top clad and the layer of thermoplastic material.

11. input unit as claimed in claim 7, which is characterized in that the material of the bottom clad includes nylon, and institute The material for stating layer of thermoplastic material includes polyurethane.

12. input unit as claimed in claim 7, which is characterized in that wherein each these described push-button unit is dome Formula support type button.

13. input unit as claimed in claim 7, which is characterized in that wherein each these described push-button unit is scissors Formula support type button.

14. input unit as claimed in claim 7, which is characterized in that the Keysheet module is force-sensing resistor formula keyboard.

15. input unit as claimed in claim 7, which is characterized in that the bottom clad is knitting layer of cloth, the top cladding Layer is leather layer, and the layer of thermoplastic material is foaming layer.

16. a kind of overlay structure manufacturing method applied to Keysheet module, which is characterized in that include：

Bottom clad is provided；

Layer of thermoplastic material is overlapped on above-mentioned bottom clad；

The above-mentioned layer of thermoplastic material of hot pressing, and then form the first thermoplastic material layer segment of non-hot pressing and the second thermoplastic through hot pressing There is first thickness, the second thermoplastic material layer segment to have second for layer material sections, wherein the first thermoplastic material layer segment Thickness, and 4~7 times that the first thickness is the second thickness, wherein the first thermoplastic material layer segment correspond to the keyboard The region of the push-button unit of module, the second thermoplastic material layer segment correspond to the region other than the push-button unit；And

Overlapping top clad, the first thickness are more than the thickness of the top clad in above-mentioned layer of thermoplastic material.

17. overlay structure manufacturing method as claimed in claim 16, which is characterized in that wherein provide the step of the bottom clad Suddenly include：

Bottom clad described in hot pressing, and then form the first carcass portion of non-hot pressing and the second carcass portion through hot pressing, institute It states the first thermoplastic material layer segment to be superimposed between first carcass portion and the top clad, second layer of thermoplastic material Part is superimposed between second carcass portion and the top clad, which has third thickness, this second Carcass portion has the 4th thickness, and 1.2~1.7 times that the third thickness is the 4th thickness.

18. overlay structure manufacturing method as claimed in claim 17, which is characterized in that the first thickness, the third are thick The summation of degree and the thickness of the top clad, for the second thickness, the thickness of the 4th thickness and the top clad 1.5~2.3 times of summation.

19. overlay structure manufacturing method as claimed in claim 16, which is characterized in that folded wherein in the layer of thermoplastic material The step of closing the top clad also include：

The coated glue layer in the layer of thermoplastic material so that the top clad and the layer of thermoplastic material after overlapping are mutual Bonding.

20. overlay structure manufacturing method as claimed in claim 16, which is characterized in that the material of the bottom clad includes Buddhist nun Dragon, and the material of the layer of thermoplastic material includes polyurethane.