CN115617181A - Keyboard device - Google Patents

Abstract

The invention discloses a keyboard device which comprises a substrate, a touch control panel module, a cover plate, a covering layer, an elastic layer and an adhesive layer. The substrate has a top surface. The touch pad module is arranged on the top surface of the substrate and comprises a circuit board. The cover plate covers the top surface of the substrate and comprises an upper surface, a lower surface and avoidance holes, and the avoidance holes penetrate through the upper surface and the lower surface and correspond to the touch pad modules. The covering layer covers the upper surface of the cover plate, the covering layer comprises a through hole and a first inner surface, the first inner surface faces the upper surface, and the through hole corresponds to the avoidance hole and is provided with a hole edge. The elastic layer is positioned in the through hole of the covering layer and comprises a ring periphery and a second inner surface, the second inner surface faces the circuit board, and the ring periphery is in seamless joint with the hole edge of the through hole. The adhesive layer is adhered between the first inner surface of the covering layer and the upper surface of the cover plate, and is adhered between the second inner surface of the elastic layer and the circuit board.

Description

Keyboard device

Technical Field

The present invention relates to an input device, and more particularly, to a keyboard device.

Background

Keyboards are input devices that are common to electronic devices such as notebook computers, desktop computers, or tablet computers. In addition, a touch pad is additionally disposed on a keyboard of a notebook computer or a tablet computer, and the touch pad is used for sensing the movement or pressing of a user's finger to control the cursor movement (e.g., displacement or pointing).

However, after the touch pad and the housing of the keyboard are assembled, a gap is often formed between the touch pad and the housing, so that external dust, debris or liquid can easily enter the keyboard from the gap, which is difficult to clean and also easily damages circuits or electronic components inside the keyboard. In addition, the consumer or user can easily see the components inside the keyboard through the gap, which affects the aesthetic appearance of the keyboard.

Disclosure of Invention

In view of the foregoing, in one embodiment, a keyboard device is provided and includes a substrate, a touch pad module, a cover plate, a covering layer, an elastic layer, and an adhesive layer. The substrate has a top surface. The touch pad module is arranged on the top surface of the substrate and comprises a circuit board. The cover plate covers the top surface of the substrate, and comprises an upper surface, a lower surface and avoiding holes, wherein the avoiding holes penetrate through the upper surface and the lower surface and correspond to the touch pad modules. The covering layer covers the upper surface of the cover plate, the covering layer comprises a through hole and a first inner surface, the first inner surface faces the upper surface, and the through hole corresponds to the avoidance hole and is provided with a hole edge. The elastic layer is positioned in the through hole of the covering layer and comprises a ring periphery and a second inner surface, the second inner surface faces the circuit board, and the ring periphery is in seamless joint with the hole edge of the through hole. The adhesive layer is adhered between the first inner surface of the covering layer and the upper surface of the cover plate and between the second inner surface of the elastic layer and the circuit board.

In summary, according to the keyboard apparatus of the embodiment of the invention, the elastic layer is located in the through hole of the covering layer, the circumferential edge of the elastic layer is seamlessly joined to the hole edge of the through hole, and the elastic layer is attached to the circuit board, so that the advantages of preventing external dust, debris or liquid from entering the keyboard apparatus, avoiding elements in the keyboard from being seen from the outside, and avoiding the need of additionally arranging a glass substrate on the touch pad module, etc. can be achieved.

Drawings

Fig. 1 is a perspective view of a first embodiment of a keyboard apparatus of the present invention.

Fig. 2 is an exploded perspective view of the first embodiment of the keyboard apparatus of the present invention.

Fig. 3 is a partial top view of the first embodiment of the keyboard apparatus of the present invention.

Fig. 4 is a cross-sectional view taken along line 4-4 of fig. 3.

Fig. 5 is a partially enlarged view of fig. 4.

Fig. 6 is a cross-sectional view taken along line 6-6 of fig. 3.

FIG. 7 is an exploded perspective view of a touch pad module according to the present invention.

Fig. 8 is an exploded perspective view of a second embodiment of the keyboard apparatus of the present invention.

Fig. 9 is an exploded perspective view of a keyboard apparatus according to a third embodiment of the present invention.

Fig. 10 is a perspective view of a keyboard apparatus according to a fourth embodiment of the present invention.

Description of reference numerals:

1. keyboard device

10. Substrate

11. The top surface

20. Touch control panel module

21. Circuit board

211. Edge of a container

212,213 surface

214. Pivoting side

22. Reinforcement plate

221. Outer ring circumference

23. Trigger switch

24. Connecting piece

30. Cover plate

31. Upper surface of

32. Lower surface

33. Avoiding hole

331. Inner peripheral edge

35. First through hole

40. Coating layer

41. Through hole

411. Hole edge

42. A first inner surface

43. First outer surface

45. Second through hole

50. Elastic layer

51. Peripheral edge of the ring

52. Second inner surface

53. Touch surface

60. Adhesive layer

61,61a,61b hollow-out part

611,612 hollow out hole

70. Push-button

80. Pivot shaft

S space between

F pattern

Detailed Description

Various embodiments are set forth in the detailed description below, which are intended to be illustrative only and are not intended to limit the scope of the invention. In addition, the drawings in the embodiments omit some elements to clearly show the technical features of the invention. The same reference numbers will be used throughout the drawings to refer to the same or like elements.

Fig. 1 is a perspective view of a keyboard apparatus according to a first embodiment of the present invention, and fig. 2 is an exploded perspective view of the keyboard apparatus according to the first embodiment of the present invention. As shown in fig. 1 and fig. 2, the keyboard apparatus 1 includes a substrate 10, a touch pad module 20, a cover 30, a covering layer 40, an elastic layer 50 and an adhesive layer 60. The keyboard device 1 can be applied to various electronic products (e.g., input devices of desktop computers, notebook computers, tablet computers or other electronic devices) for users to operate and input corresponding signals. As shown in fig. 1, in the present embodiment, the keyboard apparatus 1 is a protective cover keyboard that can be used with a tablet computer, but this is not limited to this, and the keyboard apparatus 1 may also be a keyboard of a notebook computer.

As shown in fig. 1 and 2, the substrate 10 may be a hard plate made of metal (e.g., iron, aluminum, or alloy) or plastic, the substrate 10 has a top surface 11, and the touch pad module 20, the cover 30, the covering layer 40, the elastic layer 50, and the adhesive layer 60 are disposed above the top surface 11. In addition, in the present embodiment, a plurality of keys 70 are further arranged above the top surface 11 of the substrate 10, and the plurality of keys 70 and the touch pad module 20 are respectively disposed in different areas above the top surface 11, wherein the plurality of keys 70 may include a letter key, a numeric key, a Space key (Space key), an Enter key (Enter key), a Caps Lock key (Caps Lock key), and the like, for a user to press and operate to generate a corresponding signal.

Fig. 3 is a partial top view of the keyboard apparatus according to the first embodiment of the present invention, fig. 4 is a sectional view taken along line 4-4 of fig. 3, fig. 5 is a partial enlarged view of fig. 4, fig. 6 is a sectional view taken along line 6-6 of fig. 3, and fig. 7 is an exploded perspective view of a touch pad module according to the present invention. As shown in fig. 2 and 4, the touch pad module 20 (e.g., touchpad or Trackpad) can be operated by a user through actions such as sliding or pressing a finger, so as to control the displacement of the cursor or generate a corresponding control signal. As shown in fig. 2 to 7, in the present embodiment, the touch pad module 20 includes a circuit board 21, and a surface 212 of the circuit board 21 facing the substrate 10 is provided with a trigger switch 23, for example, the trigger switch 23 may be a push button switch or a micro switch. In addition, the circuit board 21 can be lowered relative to the substrate 10 when pressed and the trigger switch 23 can be pressed to generate a signal. When the circuit board 21 is released, it can be lifted and reset by the elastic force accumulated by the pressing of the trigger switch 23. In some embodiments, the circuit board 21 may be a resistive touch panel, a capacitive touch panel, an optical touch panel, or the like.

As shown in fig. 6 and fig. 7, in the present embodiment, the circuit board 21 includes a pivot side 214, the pivot side 214 is located at an opposite side of the trigger switch 23, and the circuit board 21 is pivoted on the top surface 11 of the substrate 10 by the pivot side 214, so that the circuit board 21 can swing and descend relative to the substrate 10 when being pressed. Here, the circuit board 21 is provided with a connecting element 24 along the pivot side 214, in the embodiment, the connecting element 24 is a long metal plate, and the connecting element 24 can be assembled and fixed to the substrate 10 by adhesion, buckling, or locking, so that the circuit board 21 can swing relative to the substrate 10 with the pivot side 214 as a fulcrum. In some embodiments, the four sides of the circuit board 21 may also be pivoted on the substrate 10, so that the circuit board 21 can be lifted relative to the substrate 10 when being pressed.

As shown in fig. 2 to 5, the cover plate 30 may be a hard shell plate made of metal (such as iron, aluminum or alloy) or plastic material, and the cover plate 30 covers the top surface 11 of the substrate 10, wherein the cover plate 30 includes an upper surface 31, a lower surface 32 and an avoiding hole 33, the avoiding hole 33 penetrates through the upper surface 31 and the lower surface 32 and corresponds to the touch pad module 20, so that the touch pad module 20 is not covered by the cover plate 30 and can be operated by a user. In addition, the cover plate 30 includes a plurality of first through holes 35, and the plurality of first through holes 35 penetrate through the upper surface 31 and the lower surface 32 and respectively correspond to the plurality of keys 70, so that the plurality of keys 70 are not covered by the cover plate 30 and can be pressed and operated by a user.

As shown in fig. 2 to 7, the covering layer 40 covers the upper surface 31 of the cover plate 30, wherein the material of the covering layer 40 is different from that of the cover plate 30, for example, the covering layer 40 may be a leather layer (e.g., genuine leather or artificial leather) or a cloth layer (e.g., cotton cloth, linen, nylon cloth, non-woven cloth, super-woven cloth, polyester fiber cloth, oxford cloth, or waterproof cloth), so that the covering layer 40 can protect the cover plate 30 and improve the aesthetic property and the operation comfort of the keyboard apparatus 1, and in addition, the covering layer 40 of different materials can be matched according to actual requirements to adjust the use touch feeling. For example, when the covering layer 40 is a cloth layer, it has moisture absorption and air permeability, and is more soft and comfortable to touch, and when the covering layer 40 is a leather layer, it makes the overall appearance of the keyboard apparatus 1 more textured, and has both durability and air permeability.

As shown in fig. 2 to 7, the coating layer 40 includes a through hole 41 and a first inner surface 42, the first inner surface 42 faces the upper surface 32 of the cover 30, the through hole 41 corresponds to the avoiding hole 33 and the touch pad module 20 and has a hole edge 411, so that the touch pad module 20 is not covered by the coating layer 40. In addition, the covering layer 40 includes a plurality of second through holes 45 respectively corresponding to the plurality of second through holes 45 and the plurality of keys 70 respectively, so that the plurality of keys 70 are not covered by the covering layer 40 and can be pressed by a user. In some embodiments, the covering layer 40 may also cover the plurality of keys 70, and the user may press the covering layer 40 to indirectly press the keys 70 to lower the trigger signal.

In some embodiments, the shapes of the avoiding hole 33, the touch pad module 20 and the through hole 41 may correspond to each other, for example, the shapes of the avoiding hole 33, the touch pad module 20 and the through hole 41 may be square, rectangular or other shapes.

As shown in fig. 2 to 7, the elastic layer 50 is located in the through hole 41 of the covering layer 40, the elastic layer 50 includes a circumferential edge 51 and a second inner surface 52, the second inner surface 52 faces the circuit board 21, and the circumferential edge 51 of the elastic layer 50 is seamlessly bonded to the hole edge 411 of the through hole 41 of the covering layer 40. In some embodiments, the covering layer 40 and the elastic layer 50 may be made of the same or different materials, for example, the elastic layer 50 may be an elastic leather layer (e.g., real leather or artificial leather) or an elastic cloth layer (e.g., cotton cloth, linen, nylon cloth, non-woven cloth, super-woven cloth, polyester cloth, oxford cloth or waterproof cloth) with elastic and stretchable properties. Preferably, the elastic layer 50 has a higher elongation in at least one direction than the elongation of the covering layer 40, i.e., the elastic stretchability of the elastic layer 50 is better than that of the covering layer 40. In other embodiments, the elastic layer 50 and the covering layer 40 may be the same cloth or leather, but the invention is not limited thereto.

In some embodiments, the covering layer 40 and the elastic layer 50 may be both cloth layers and are spliced together to form a single cloth. For example, in the manufacturing process, the covering layer 40 is punched or cut to form the through hole 41, the elastic layer 50 corresponding to the shape of the through hole 41 is prepared (the shape of the elastic layer 50 and the shape of the through hole 41 are both rectangular), and the peripheral edge 51 of the elastic layer 50 is seamlessly bonded to the hole edge 411 of the through hole 41 of the covering layer 40 by sewing or bonding with an adhesive (such as a waterproof adhesive), so that the covering layer 40 and the elastic layer 50 are seamlessly spliced to form a cloth layer.

As shown in fig. 2 and 5, the adhesion layer 60 is adhered between the first inner surface 42 of the covering layer 40 and the upper surface 31 of the cover 30, and between the second inner surface 52 of the elastic layer 50 and the circuit board 21, so that the covering layer 40 is directly fixed on the upper surface 31 of the cover 30, and the elastic layer 50 is directly fixed on the surface 213 of the circuit board 21 facing the elastic layer 50, that is, after the covering layer 40 and the elastic layer 50 are seamlessly joined, the covering layer 30 and the circuit board 21 can be directly adhered by the adhesion layer 60.

In some embodiments, the adhesive layer 60 may be a double-sided adhesive layer, a thermoplastic hot-melt adhesive layer, a thermosetting hot-melt adhesive layer, or a general adhesive layer. For the reason that the adhesive layer 60 is a thermoplastic hot-melt adhesive layer, in the assembly process, after the covering layer 40 and the elastic layer 50 are seamlessly spliced, the adhesive layer 60 may be disposed on the first inner surface 42 of the covering layer 40 and the second inner surface 52 of the elastic layer 50, after the covering layer 40 and the elastic layer 50 are covered on the cover plate 30 and the circuit board 21, the adhesive layer 60 is heated to soften the adhesive layer 60 to generate an adhesive force, and after the adhesive layer 60 is cooled and hardened, each part of the covering layer 40 and the elastic layer 50 can be quickly and uniformly combined and fixed.

Therefore, the elastic layer 50 is located in the through hole 41 of the covering layer 40, the peripheral edge 51 of the elastic layer 50 is seamlessly joined to the hole edge 411 of the through hole 41, and the elastic layer 50 is directly attached to the surface of the circuit board 21, so that the advantages of waterproof and dustproof, cost saving, aesthetic property improvement and the like can be achieved, which are respectively described in detail below.

First, as shown in fig. 2 and fig. 5, the elastic layer 50 is located in the through hole 41 of the covering layer 40, and the peripheral edge 51 of the elastic layer 50 is seamlessly joined to the hole edge 411 of the through hole 41, so as to prevent external dust, debris or liquid from entering the keyboard apparatus 1 from the joint of the covering layer 40 and the elastic layer 50, achieve the waterproof and dustproof effects, make the keyboard apparatus 1 easier to clean, and avoid the damage of the circuit or the electronic components inside the keyboard apparatus 1. In addition, the user can not see the components inside the keyboard apparatus 1 from the outside, so the components inside the keyboard apparatus 1 do not need to be treated by appearance (for example, the components are sprayed or painted black), and the manufacturing process and labor cost can be reduced.

In addition, since the cover plate 30 and the touch pad module 20 are covered by the covering layer 40 and the elastic layer 50, respectively, the surface flatness of the keyboard apparatus 1 can be further improved, and in the manufacturing process, the covering layer 40 does not need to be cut by using a laser cutting device to expose the touch pad module 20 after being assembled, so that the cost required by cutting (such as attaching and tearing off a protective tape for cutting or cleaning cost after cutting) can be saved, and the risk of Electrostatic Discharge (Electrostatic Discharge) can be reduced, thereby reducing the cost by saving elements or manufacturing processes for avoiding Electrostatic Discharge.

As shown in fig. 4 and 5, the elastic layer 50 is directly attached to the surface 213 of the circuit board 21, so that no additional glass substrate is required to be disposed on the circuit board 21, thereby greatly saving the cost. Specifically, the elastic layer 50 may have a touch surface 53, and the touch surface 53 and the second inner surface 52 are opposite surfaces of the elastic layer 50, so that the user's finger can directly slide or press on the touch surface 53, and the circuit board 21 can generate functions of scrolling, enlarging, reducing, or opening the window according to the sliding or gesture of the user's finger on the touch surface 53. Alternatively, the circuit board 21 may generate a function such as selecting or displaying a function table in response to the user's finger pressing, clicking or double clicking on the touch surface 53. In addition, the elastic layer 50 has elastic expansion and contraction characteristics, so that when the circuit board 21 is pressed to descend relative to the substrate 10, the elastic layer 50 can be synchronously and elastically stretched to avoid influencing the operation hand feeling. In other embodiments, a Mylar (not shown) layer may be added on the circuit board 21 to serve as a touch interface, which is not limited in the present invention.

As shown in fig. 5, in the present embodiment, the covering layer 40 includes a first outer surface 43, the first outer surface 43 and the first inner surface 42 are two opposite surfaces of the covering layer 40, and the touch surface 53 of the elastic layer 50 and the first outer surface 43 of the covering layer 40 can be located on the same plane, so as to improve the surface flatness of the keyboard apparatus 1 for better appearance.

In some embodiments, the covering layer 40 may be a unidirectional elastic stretch fabric (1-way stretch fabric), that is, the covering layer 40 may be a fabric that allows elastic stretching only in a transverse direction (e.g., the X-axis direction shown in fig. 1) or a straight direction (e.g., the Y-axis direction shown in fig. 1) for easy rolling and then fixing on the cover 30, but this is not limited, for example, the elastic stretching direction of the covering layer 40 may match the movement direction of the product, for example, as shown in fig. 1, in this embodiment, the keyboard apparatus 1 has a pivot 80, so that a component (e.g., a display screen or a cover) connected to the pivot 80 can swing and move in the straight direction (e.g., the Y-axis direction, i.e., the direction perpendicular to the pivot 80) around the pivot 80, thereby preventing the covering layer 40 from affecting the operation feel. The elastic layer 50 may be a multi-directional elastic stretchable fabric layer, for example, the elastic layer 50 may be a 2-way stretch fabric layer or a 4-way stretch fabric layer, which allows at least transverse (X-axis direction shown in fig. 1) and vertical (Y-axis direction shown in fig. 1) elastic stretching, so that when the circuit board 21 is pressed and lowered relative to the substrate 10, the pulling of the elastic layer 50 may be greatly reduced to provide a good operation feeling.

As shown in fig. 4 to 7, in the present embodiment, the touch panel module 20 further includes a reinforcing plate 22, for example, the reinforcing plate 22 may be a hard plate made of metal (such as iron, aluminum or alloy) or plastic material, the reinforcing plate 22 is stacked and fixed on the surface 212 of the circuit board 21 facing the substrate 10, and the reinforcing plate 22 has an outer circumferential edge 221, the outer circumferential edge 221 is adjacent to the edge 211 and the corner of the circuit board 21, so that the structural strength of the touch panel module 20 is increased by the reinforcing plate 22, the idle stroke and the moving stroke of the touch panel module 20 after being pressed can be reduced, and the pulling amount of the elastic layer 50 is further reduced, so that the touch panel module 20 can provide better operation feeling. In addition, since the outer circumference 221 of the stiffener 22 is adjacent to the edge 211 and the corner of the circuit board 21, even if the corner or the edge of the circuit board 21 is pressed, the idle stroke and the moving stroke of the touch pad module 20 after being pressed can be reduced by the stiffener 22.

As shown in fig. 3 and fig. 5, the size of the circuit board 21 is smaller than the size of the avoiding hole 33, such that a space S is provided between the edge 211 of the circuit board 21 and the inner circumferential edge 331 of the avoiding hole 33, for example, in the present embodiment, the length and the width of the circuit board 21 are respectively smaller than the length and the width of the avoiding hole 33, such that an annular space S is formed between the edge 211 of the circuit board 21 and the inner circumferential edge 331 of the avoiding hole 33, and the local area around the elastic layer 50 is located within the space S (i.e., between the edge 211 and the inner circumferential edge 331). Therefore, the local elastic layer 50 located in the space S (i.e. between the edge 211 and the inner circumferential edge 331) is not fixed, so that the local elastic layer 50 has better stretchability, and can have better elastic stretching effect when the circuit board 21 is pressed to operate, thereby providing a good operation feeling. In some embodiments, the circuit board 21 may have a length or width smaller than that of the avoiding hole 33 to form the space S with different shapes, which is not limited.

As shown in fig. 3 and 5, the joint between the circumferential edge 51 of the elastic layer 50 and the hole edge 411 of the through hole 41 of the covering layer 40 is located within the space S, that is, the joint is located between the edge 211 of the circuit board 21 and the inner circumferential edge 331 of the avoiding hole 33, so that when the elastic layer 50 is stressed and elastically stretched, the stress applied to the joint can be greatly reduced, and the elastic layer 50 and the covering layer 40 are prevented from separating from each other, thereby prolonging the service life.

As shown in fig. 2, fig. 3 and fig. 5, in the present embodiment, the following layer 60 further has a hollow portion 61, wherein the hollow portion 61 is a local hollow area of the following layer 60, and the hollow portion 61 is located within the space S (i.e., between the edge 211 and the inner peripheral edge 331), so that after the elastic layer 50 and the following layer 60 are stacked, the hardness of the local elastic layer 50 located within the space S can be further reduced to have better stretchability, so as to provide better operation feeling.

In some embodiments, the following different embodiments of the opening 61 of the adhesion layer 60 can be used. As shown in fig. 2 and 3, in the present embodiment, a distance S between the edge 211 of the circuit board 21 and the inner circumferential edge 331 of the avoiding hole 33 is an annular distance, and the hollow portion 61 includes a plurality of hollow holes 611, where the plurality of hollow holes 611 are circular holes respectively and are annularly arranged in a row along the distance S.

However, the above embodiments are only examples, in some embodiments, the hollow holes 611 may also be square holes, long holes, elliptical holes or other holes, and the shapes of the hollow holes 611 may be the same or only partially the same. In addition, the plurality of hollow holes 611 may also be arranged in a plurality of rows or only be disposed in a partial region of the ring pitch S.

Fig. 8 is an exploded perspective view of a keyboard device according to a second embodiment of the invention, and as shown in fig. 8, the shape of the hollow portion 61a of the present embodiment is different from the shape of the hollow portion 61 of the first embodiment, and the hollow portion 61a of the present embodiment is a single annular through hole and is disposed along the annular space S, compared with the first embodiment, the hollow area of the hollow portion 61a is larger, so that the hardness of the local elastic layer 50 within the space S is further reduced and the elastic layer has better stretchability.

Fig. 9 is an exploded perspective view of a keyboard device according to a third embodiment of the invention, and as shown in fig. 9, the shape of the hollow portion 61b of the present embodiment is different from the shape of the hollow portion 61 of the first embodiment, and the hollow portion 61b of the present embodiment includes a plurality of hollow holes 612, where the plurality of hollow holes 612 are respectively long holes and are annularly arranged along the space S, and compared with the first embodiment, the hollow area of the hollow portion 61b can be increased, so that the hardness of the local elastic layer 50 located within the space S is further reduced, and the elastic layer has better stretchability.

Fig. 10 is a perspective view of a keyboard apparatus according to a fourth embodiment of the invention, as shown in fig. 10, since the elastic layer 50 and the covering layer 40 are independent components, and the elastic layer 50 covers the touch pad module 20 correspondingly, different patterns F (such as characters, symbols, patterns or images) can be set on the touch surface 53 of the elastic layer 50 according to the user's requirement, so as to generate different appearance changes and visual effects, and the pattern F set on the touch surface 53 can also be used for clearly identifying the operation area and position of the touch pad module 20, for example, in the manufacturing process, the elastic layer 50 can be spliced with the covering layer 40 after the setting of the pattern F is completed separately.

In some embodiments, the color of the elastic layer 50 may be different from the color of the covering layer 40, which also achieves the advantages of producing different appearance changes and visual effects and providing clear identification of the operation area and position of the touch pad module 20.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (12)

1. A keyboard apparatus, comprising:

a substrate having a top surface;

a touch pad module disposed on the top surface of the substrate, the touch pad module including a circuit board;

the cover plate covers the top surface of the substrate, and comprises an upper surface, a lower surface and an avoiding hole, wherein the avoiding hole penetrates through the upper surface and the lower surface and corresponds to the touch pad module;

a covering layer covering the upper surface of the cover plate, wherein the covering layer comprises a through hole and a first inner surface, the first inner surface faces the upper surface, and the through hole corresponds to the avoidance hole and is provided with a hole edge;

the elastic layer is positioned in the through hole of the covering layer and comprises a ring periphery and a second inner surface, the second inner surface faces the circuit board, and the ring periphery is in seamless joint with the hole edge of the through hole; and

and a bonding layer bonded between the first inner surface of the cladding layer and the upper surface of the cover plate, and between the second inner surface of the elastic layer and the circuit board.

2. The keyboard device of claim 1, wherein the elastic layer has a higher elongation in at least one direction than the elongation of the covering layer.

3. The keyboard apparatus of claim 1, wherein the cover layer is a unidirectional elastic fabric layer, and the elastic layer is a multidirectional elastic fabric layer.

4. The keyboard device of claim 1, further comprising a plurality of keys arranged on the top surface of the substrate, the cover plate comprising a plurality of first through holes, the cover layer comprising a plurality of second through holes, the first through holes respectively corresponding to the second through holes, the keys respectively corresponding to the second through holes.

5. The keyboard apparatus of claim 1, wherein the touch pad module comprises a stiffener fixed to a surface of the circuit board facing the substrate, and the stiffener comprises an outer periphery adjacent to an edge of the circuit board.

6. The keyboard apparatus of claim 1, wherein the circuit board comprises a pivoting side pivotally disposed on the top surface of the base plate.

7. The keyboard apparatus of claim 1, wherein the size of the circuit board is smaller than the size of the avoiding hole, such that a space is provided between an edge of the circuit board and an inner periphery of the avoiding hole, and the elastic layer is partially located within the space.

8. The keyboard device of claim 7, wherein the junction of the peripheral edge of the ring and the rim of the through hole is within the gap.

9. The keyboard device of claim 7, wherein the adhesion layer has a hollow portion, and the hollow portion is located within the gap.

10. The keyboard device of claim 9, wherein the space is an annular space, and the hollowed-out portion is an annular through hole.

11. The keyboard device of claim 9, wherein the hollowed-out portion comprises a plurality of hollowed-out holes, and the hollowed-out holes are arranged in at least one row.

12. The keyboard apparatus of claim 11, wherein the openings are identical in shape.

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