CN216311654U - Key structure and keyboard - Google Patents

Abstract

The utility model provides a key structure and a keyboard, wherein the key structure comprises a bottom plate, a first positioning groove, a second positioning groove and a balancing rod, wherein the bottom plate is provided with a first end and a second end; the first positioning groove is arranged at the first end, a first extending part of the first positioning groove extends from the first end along the third direction, a second extending part extends from the first extending part along the first direction, a third extending part extends from the second extending part along the reverse direction of the third direction, and a gap is formed between the third extending part and the bottom plate; the second positioning groove is arranged at the second end, a fourth extending part of the second positioning groove extends from the second end along the third direction, a fifth extending part extends from the fourth extending part along the reverse direction of the first direction, a sixth extending part extends from the fifth extending part along the reverse direction of the third direction, and a gap is formed between the sixth extending part and the bottom plate; the connecting rod portion of balancing pole is connected first pole portion and second pole portion, and first pole portion sets up in first constant head tank, and second pole portion sets up in the second constant head tank, and the demand space is little, avoids deviating from the constant head tank.

Description

Key structure and keyboard

Technical Field

The present disclosure relates to keypad assemblies and, particularly, to a keypad assembly with a balancing bar.

Background

In terms of the current usage habit of personal computers, keyboards are one of the indispensable input devices for inputting characters, symbols or numbers. Moreover, for consumer electronics products in daily life or large processing equipment used in industry, a key structure is required to be provided as an input device for users to perform operations such as character input.

With regard to the common keyboard keys on the market at present, the balancing pole and the bottom plate are designed in a matching way, so that the required space is large, the corner performance of the keys is reduced, and the balancing pole is easy to be separated from the positioning groove of the bottom plate.

Therefore, there is a need to design a new key structure and keyboard to overcome the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a key structure and a keyboard, which have small required space and can avoid being separated from a positioning groove of a bottom plate.

In order to achieve the above object, the present invention provides a key structure, comprising: a base plate extending in a first direction and a second direction, the base plate having a first end and a second end opposite to each other; the first positioning groove is arranged at the first end of the bottom plate and provided with a first extending part, a second extending part and a third extending part which are sequentially connected, the first extending part extends from the first end along a third direction, the second extending part extends from the tail end of the first extending part along the first direction, the third extending part extends from the tail end of the second extending part along the reverse direction of the third direction, and a first gap is formed between the third extending part and the bottom plate, wherein the first direction, the second direction and the third direction are different; the second positioning groove is arranged at the second end of the bottom plate and is provided with a fourth extending part, a fifth extending part and a sixth extending part which are sequentially connected, the fourth extending part extends from the second end along the third direction, the fifth extending part extends from the tail end of the fourth extending part along the reverse direction of the first direction, the sixth extending part extends from the tail end of the fifth extending part along the reverse direction of the third direction, and a second gap is formed between the sixth extending part and the bottom plate; the balance rod is matched with the first positioning groove and the second positioning groove respectively and is provided with a first rod part, a second rod part and a connecting rod part, one end of the first rod part is connected with one end of the second rod part by the connecting rod part, the other end of the first rod part is arranged in the first positioning groove, and the other end of the second rod part is arranged in the second positioning groove; when the first rod part and the second rod part are respectively positioned in the first positioning groove and the second positioning groove, the first direction is perpendicular to the first rod part and the second rod part, the third extension part forms a stop for the first rod part in the first direction, and the sixth extension part forms a stop for the second rod part in the reverse direction of the first direction.

Preferably, the first extension portion, the second extension portion and the third extension portion form a first opening in the first direction, the fourth extension portion, the fifth extension portion and the sixth extension portion form a second opening in the direction opposite to the first direction, the direction of the first opening is opposite to the direction of the second opening, and the first opening is opposite to the second opening.

Preferably, the first extension portion has a first height along the third direction, the third extension portion has a second height along the third direction, and the first height is greater than the second height to form the first gap; the fourth extending portion has a third height along the third direction, the sixth extending portion has a fourth height along the third direction, and the third height is greater than the fourth height to form the second gap.

Preferably, the first positioning groove and the second positioning groove are located on the same straight line in the first direction.

Preferably, the first extending portion, the second extending portion and the third extending portion are formed into the first positioning groove by punching the bottom plate, and the fourth extending portion, the fifth extending portion and the sixth extending portion are formed into the second positioning groove by punching the bottom plate.

Preferably, the bottom plate further comprises a first avoidance through hole and a second avoidance through hole, the second extension portion and the third extension portion are located in the first avoidance through hole along the reverse projection of the third direction, the fifth extension portion and the sixth extension portion are located in the second avoidance through hole along the reverse projection of the third direction, the other end of the first rod portion of the balance rod is located in the first avoidance through hole, and the other end of the second rod portion of the balance rod is located in the second avoidance through hole.

Preferably, the first extending portion, the second extending portion and the third extending portion form a first through groove in the forward and reverse directions of the second direction, the fourth extending portion, the fifth extending portion and the sixth extending portion form a second through groove in the forward and reverse directions of the second direction, when the balance bar is assembled, the other end of the first bar portion of the balance bar is disposed in the first through groove in the second direction, and the other end of the second bar portion of the balance bar is disposed in the second through groove in the second direction.

Preferably, the keyboard further comprises a key cap, wherein the first positioning groove, the second positioning groove and the balance rod are located between the key cap and the bottom plate, and the key cap is matched with the connecting rod part of the balance rod.

Preferably, the keyboard further comprises a lifting mechanism disposed between the key cap and the bottom plate, the lifting mechanism is disposed between the first positioning groove and the second positioning groove, when the lifting mechanism is pressed corresponding to the key cap and moves along the third direction, the connecting rod portion of the balance rod moves along the third direction, the other end of the first rod portion of the balance rod moves in the first positioning groove, the other end of the second rod portion of the balance rod moves in the second positioning groove, the third extension portion prevents the first rod portion from being separated from the first end, and the sixth extension portion prevents the second rod portion from being separated from the second end.

The utility model also provides a keyboard comprising the key structure.

Compared with the prior art, the key structure and the keyboard provided by the utility model are provided with the first positioning groove and the second positioning groove, the first positioning groove and the second positioning groove are respectively provided with the plurality of extending parts which are sequentially connected and extend in different directions, and a gap is formed between the tail ends of the extending parts and the bottom plate, so that the balance bar is stopped in the lateral direction (the direction vertical to the first bar part) while the conventional first bar part and the second bar part are limited to perform lifting and rotating motions, and the balance bar is prevented from being separated from the first positioning groove and the second positioning groove. Through the design of the utility model, the anti-falling effect is achieved while the function of the conventional balance rod is met, and the design not only facilitates the manufacture of the first positioning groove and the second positioning groove and improves the processing efficiency, but also reduces the precision requirement and the space requirement of the design and facilitates the design and the manufacture of keys and other parts on a keyboard.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is an exploded view of a key structure according to an embodiment of the present invention;

FIG. 2 is a side view of a key structure according to an embodiment of the present invention;

FIG. 3 is an assembled perspective view of a stabilizer bar and a base plate in accordance with an embodiment of the present invention;

fig. 4 is a top view of the balance bar and base plate assembly in accordance with one embodiment of the present invention.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

Referring to fig. 1 to 4, fig. 1 is an exploded view of a key structure according to an embodiment of the present invention, fig. 2 is a side view of the key structure according to the embodiment of the present invention, fig. 3 is an assembled perspective view of a balance bar and a bottom plate according to the embodiment of the present invention, and fig. 4 is an assembled top view of the balance bar and the bottom plate according to the embodiment of the present invention.

According to the key structure 100 provided by the embodiment of the utility model, the key structure 100 includes a bottom plate 11, a first positioning groove 12, a second positioning groove 13 and a balance bar 14, the bottom plate 11 extends along a first direction 1001 and a second direction 1002, the bottom plate 11 has a first end 111 and a second end 112, and the first end 111 and the second end 112 are opposite. The first positioning slot 12 is disposed at the first end 111 of the bottom plate 11, the first positioning slot 12 has a first extending portion 121, a second extending portion 122 and a third extending portion 123, the first extending portion 121 extends from the first end 111 along the third direction 1003, the second extending portion 122 extends from the end of the first extending portion 121 along the first direction 1001, the third extending portion 123 extends from the end of the second extending portion 122 along the reverse direction of the third direction 1003, the third extending portion 123 and the bottom plate 11 form a first gap 124, wherein the first direction, the second direction 1002 and the third direction 1003 are different. The second positioning slot 13 is disposed at the second end 112 of the bottom plate 11, the second positioning slot 13 has a fourth extending portion 131, a fifth extending portion 132 and a sixth extending portion 133, the fourth extending portion 131 extends from the second end 112 along the third direction 1003, the fifth extending portion 132 extends from the end of the fourth extending portion 131 along the reverse direction of the first direction 1001, the sixth extending portion 133 extends from the end of the fifth extending portion 132 along the reverse direction of the third direction 1003, and the sixth extending portion 133 and the bottom plate 11 form a second gap 134. The balance bar 14 is respectively matched with the first positioning groove 12 and the second positioning groove 13, the balance bar 14 has a first bar part 141, a second bar part 142 and a connecting bar part 143, the connecting bar part 143 connects one end of the first bar part 141 with one end of the second bar part 142, the other end of the first bar part 141 is arranged in the first positioning groove 12, the other end of the second bar part 142 is arranged in the second positioning groove 13, wherein, when the first rod portion 141 and the second rod portion 142 are respectively located in the first positioning groove 12 and the second positioning groove 13, the first direction 1001 is perpendicular to the first rod portion 141 and the second rod portion 142, the third extending portion 123 forms a stop for the first rod portion 141 in the first direction 1001, the sixth extending portion 133 forms a stop for the second rod portion 142 in the opposite direction of the first direction 1001, thus, the first positioning groove 12 and the third positioning groove 13 require a small space and prevent the end of the first rod portion 141 and the end of the second rod portion 142 of the balance bar 14 from coming off from the first positioning groove 12 and the second positioning groove 13 on the bottom plate 11.

Next, the structure and the position relationship of the bottom plate 11, the first positioning groove 12, the second positioning groove 13 and the balance bar 14 will be described in detail, wherein the first direction 1001, the second direction 1002 and the third direction 1003 are perpendicular to each other in the embodiment of the present invention, and the present invention is not limited thereto.

Referring to fig. 1 to 4, the bottom plate 11 is plate-shaped, and the bottom plate 11 is generally a metal bottom plate for supporting and receiving the key structure 100. The bottom plate 11 has a first end 111, a second end 112, a first avoidance through hole 113 and a second avoidance through hole 114, the first avoidance through hole 113 is located at the first end 111 of the bottom plate 11, the second avoidance through hole 114 is located at the second end 112 of the bottom plate 11, the second extension portion 122 and the third extension portion 123 of the first positioning groove 12 are both located in the first avoidance through hole 113 along the reverse projection of the third direction 1003, the fifth extension portion 132 and the sixth extension portion 133 of the second positioning groove 114 are both located in the second avoidance through hole 114 along the reverse projection of the third direction 1003, the other end of the first rod portion 141 of the stabilizer bar 14 is located in the first avoidance through hole 113, and the other end of the second rod portion 142 of the stabilizer bar 14 is located in the second avoidance through hole 114. The first avoidance through hole 113 and the second avoidance through hole 114 facilitate material taking through the first avoidance through hole 113 and the second avoidance through hole 114 when the key structure 100 is assembled, and the end of the first rod part 141 of the balance bar 14 moves in the first avoidance through hole 113 and the end of the second rod part 142 moves in the second avoidance through hole 114. In practical manufacturing, the first extending portion 121, the second extending portion 122 and the third extending portion 133 are sequentially formed by punching from the bottom plate 11 to form the first positioning groove 12, the fourth extending portion 131, the fifth extending portion 132 and the sixth extending portion 133 are formed by punching from the bottom plate 11 to form the second positioning groove 13, the first positioning groove 12 is formed by punching and bending three times from the first end 111 of the bottom plate 11, and the second positioning groove 13 is formed by punching and bending three times from the second end 112 of the bottom plate 11.

Referring to fig. 1 to 4, the first extending portion 121, the second extending portion 122 and the third extending portion 133 of the first positioning groove 12 form a first opening 151 in a first direction 1001, and the fourth extending portion 131, the fifth extending portion 132 and the sixth extending portion 133 of the second positioning groove 13 form a second opening 152 in a direction opposite to the first direction 1001, that is, the first opening 151 faces opposite to the second opening 152, and the first opening 151 faces opposite to the second opening 152. In specific implementation, the first opening 151 is located at the first end 111 of the bottom plate 11, the orientation of the first opening 151 is the first direction 1001, the second opening 152 is located at the second end 112 of the bottom plate 11, the orientation of the second opening 152 is the reverse direction of the first direction 1001, the first opening 151 and the second opening 152 form symmetrical openings facing away from each other, so that the third extending portion 123 of the first positioning groove 12 forms a block of the first direction on the first rod portion 141 of the balance bar 14, and the sixth extending portion 133 of the second positioning groove 1001 forms a block of the reverse direction of the first direction 1001 on the second rod portion 142 of the balance bar 14, thereby preventing the end of the first rod portion 141 from coming out of the second positioning groove 13 and the end of the first rod portion 12 and the end of the second rod portion 142 from coming out of the second positioning groove 13.

Referring to fig. 1 to 4, the first extending portion 121, the second extending portion 122 and the third extending portion 123 of the first positioning groove 12 form a first through groove 161 facing forward and backward in the second direction 1002, and the fourth extending portion 131, the fifth extending portion 132 and the sixth extending portion 133 of the second positioning groove 13 form a second through groove 162 facing forward and backward in the second direction 1002. When assembled, the other end (tip) of first rod portion 141 of stabilizer bar 14 is disposed in first through groove 161 along second direction 1002, and the other end of second rod portion 142 of stabilizer bar 14 is disposed in second through groove 162 along second direction 1002. In specific implementation, the first positioning groove 12 has a first through groove 161 in the forward and reverse directions of the second direction 1002, the end of the first rod portion 141 of the balance bar 14 is located in the first through groove 161, the second positioning groove 13 has a second through groove 162 in the forward and reverse directions of the second direction 1002, the end of the second rod portion 142 of the balance bar 14 is located in the second through groove 162, the first through groove 161 cooperates with the first opening 151 to enable the first positioning groove 12 to prevent the end of the first rod portion 141 of the balance bar 14 from being separated from the first opening 151, and the second through groove 162 cooperates with the second opening 152 to enable the second positioning groove 13 to prevent the end of the second rod portion 142 of the balance bar 14 from being separated from the second opening 152.

Referring to fig. 1 to 4, the first extending portion 121 of the first positioning slot 12 has a first height 1211 along the third direction 1003, the third extending portion 123 has a second height 1231 along the third direction 1003, and the first height 1211 is greater than the second height 1231 to form a first gap 124; the fourth extending portion 131 of the second positioning slot 13 has a third height 1311 along the third direction 1003, the sixth extending portion 133 has a fourth height 1331 along the third direction 1003, and the third height 1311 is greater than the fourth height 1331 to form the second gap 134. Specifically, in the third direction 1003, the height of the first extending portion 121 is greater than the height of the third extending portion 123, so that the third extending portion 123 is not connected to the bottom plate 11 but has a first gap 124 with the bottom plate 11, and thus the third extending portion 123 is at a distance from the first avoiding through hole 113, which does not affect the material taking from the manufacturing process of the first avoiding through hole 113; similarly, in the third direction 1003, the height of the fourth extending portion 131 is greater than the height of the sixth extending portion 133, so that the sixth extending portion 133 is not connected to the bottom plate 11 but has a second gap 134 with the bottom plate 11, and thus the sixth extending portion 133 is spaced from the second avoiding through hole 114 by a certain distance, which does not affect the material taking from the manufacturing process of the second avoiding through hole 114.

In the embodiment of the present invention, the first positioning groove 12 and the second positioning groove 13 are located on the same straight line in the first direction 1001, so that the first positioning groove 12 and the second positioning groove 13 form a symmetrical structure on the bottom plate 11, which is convenient for processing and assembling the balance bar 14.

In the embodiment of the present invention, the key structure 100 further includes a key cap 17, the first positioning groove 12, the second positioning groove 13 and the balance bar 14 are located between the key cap 17 and the bottom plate 11, and the key cap 17 is matched with the connecting rod portion 143 of the balance bar 14. During specific implementation, the connecting rod portion 143 of the balance bar 14 is rigidly connected to the inner surface of the key cap 17, the key cap 17 is forced to move up and down along the third direction 1003, so as to drive the connecting rod portion 143 of the balance bar 14 to move up and down, and at the same time, drive the first rod portion 141 of the balance bar 14 to move in the first positioning groove 12 and the second rod portion 142 to move in the second positioning groove 13, and the first rod portion 141 is limited to move in the first direction 1001 and the second rod portion 142 is limited to move in the first direction 1001, so as to prevent the balance bar 14 from coming out of the positioning groove.

In the embodiment of the present invention, the key structure 100 further includes a lifting mechanism 18, the lifting mechanism 18 is disposed between the key cap 17 and the bottom plate 11, the lifting mechanism 18 is disposed between the first positioning groove 12 and the second positioning groove 13, when the lifting mechanism 18 moves along the third direction 1003, the connecting rod portion 143 of the balance bar 14 moves along the third direction 1003, the other end of the first rod portion 141 of the balance bar 14 moves in the first positioning groove 12, the other end of the second rod portion 142 of the balance bar 14 moves in the second positioning groove 13, the third extending portion 123 prevents the first rod portion 141 from being separated from the first end 111 of the bottom plate 11, and the sixth extending portion 133 prevents the second rod portion 142 from being separated from the second end 112 of the bottom plate 11. In specific implementation, the lifting mechanism 18 is disposed between the key cap 17 and the bottom plate 11, a user presses the key cap 17 to make the lifting mechanism 18 move up and down along the third direction 1003, the connecting rod portion 143 of the balance bar 14 also moves up and down along the third direction 1003, the end of the first rod portion 141 of the balance bar 14 is limited by the first positioning groove 12 and the end of the second rod portion 142 is limited by the second positioning groove 13 during movement, so that the end of the first rod portion 141 is prevented from coming out of the first opening 151 and the end of the second rod portion 142 is prevented from coming out of the second opening 152.

The present invention further provides a keyboard, which includes the key structure 100 described above, and the keyboard may be an input device or a key device, depending on the actual situation, which is not limited thereto.

In summary, the key structure and the keyboard provided by the present invention include a bottom plate, a first positioning groove, a second positioning groove and a balance bar, wherein the bottom plate extends along a first direction and a second direction, the bottom plate has a first end and a second end, and the first end is opposite to the second end; the first positioning groove is arranged at the first end of the bottom plate, the first positioning groove is provided with a first extending part, a second extending part and a third extending part, the first extending part extends from the first end along the third direction, the second extending part extends from the first extending part along the first direction, the third extending part extends from the second extending part along the reverse direction of the third direction, and a first gap is formed between the third extending part and the bottom plate, wherein the first direction, the second direction and the third direction are different; the second positioning groove is arranged at the second end of the bottom plate and is provided with a fourth extending part, a fifth extending part and a sixth extending part, the fourth extending part extends from the second end along the third direction, the fifth extending part extends from the fourth extending part along the reverse direction of the first direction, the sixth extending part extends from the fifth extending part along the reverse direction of the third direction, and a second gap is formed between the sixth extending part and the bottom plate; the balancing pole cooperates with first constant head tank and second constant head tank respectively, the balancing pole has first pole portion, second pole portion and connecting rod portion, connecting rod portion is connected the one end of first pole portion and second pole portion, the other end of first pole portion sets up in first constant head tank, the other end of second pole portion sets up in the second constant head tank, first constant head tank and third constant head tank demand space are little and avoid the tip of the first pole portion of balancing pole and the tip of second pole portion to deviate from first constant head tank and second constant head tank on the bottom plate.

Although the present invention has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of preferred embodiments of the present invention and should not be construed as limiting the utility model. The scale in the schematic drawings does not represent the scale of actual components for the sake of clarity in describing the required components.

The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the utility model. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.

Claims (10)

1. A key structure, comprising:

a base plate extending in a first direction and a second direction, the base plate having a first end and a second end opposite to each other;

the first positioning groove is arranged at the first end of the bottom plate and provided with a first extending part, a second extending part and a third extending part which are sequentially connected, the first extending part extends from the first end along a third direction, the second extending part extends from the tail end of the first extending part along the first direction, the third extending part extends from the tail end of the second extending part along the reverse direction of the third direction, and a first gap is formed between the third extending part and the bottom plate, wherein the first direction, the second direction and the third direction are different;

the second positioning groove is arranged at the second end of the bottom plate and is provided with a fourth extending part, a fifth extending part and a sixth extending part which are sequentially connected, the fourth extending part extends from the second end along the third direction, the fifth extending part extends from the tail end of the fourth extending part along the reverse direction of the first direction, the sixth extending part extends from the tail end of the fifth extending part along the reverse direction of the third direction, and a second gap is formed between the sixth extending part and the bottom plate; and

the balance rod is matched with the first positioning groove and the second positioning groove respectively and is provided with a first rod part, a second rod part and a connecting rod part, one end of the first rod part is connected with one end of the second rod part by the connecting rod part, the other end of the first rod part is arranged in the first positioning groove, and the other end of the second rod part is arranged in the second positioning groove;

when the first rod part and the second rod part are respectively positioned in the first positioning groove and the second positioning groove, the first direction is perpendicular to the first rod part and the second rod part, the third extension part forms a stop for the first rod part in the first direction, and the sixth extension part forms a stop for the second rod part in the reverse direction of the first direction.

2. The key structure of claim 1, wherein the first extension portion, the second extension portion and the third extension portion form a first opening in a direction of the first direction, the fourth extension portion, the fifth extension portion and the sixth extension portion form a second opening in a direction opposite to the first direction, the first opening is opposite to the second opening and the first opening is opposite to the second opening.

3. The key structure of claim 1, wherein the first extension has a first height along the third direction, the third extension has a second height along the third direction, and the first height is greater than the second height to form the first gap; the fourth extending portion has a third height along the third direction, the sixth extending portion has a fourth height along the third direction, and the third height is greater than the fourth height to form the second gap.

4. The key structure of claim 1, wherein the first detent and the second detent are aligned in the first direction.

5. The key structure of claim 1, wherein the first extension portion, the second extension portion and the third extension portion are formed by stamping the bottom plate to form the first positioning groove, and the fourth extension portion, the fifth extension portion and the sixth extension portion are formed by stamping the bottom plate to form the second positioning groove.

6. The key structure of claim 1, wherein the bottom plate further includes a first avoiding through hole and a second avoiding through hole, the projections of the second extending portion and the third extending portion in the third direction are both located in the first avoiding through hole, the projections of the fifth extending portion and the sixth extending portion in the third direction are both located in the second avoiding through hole, the other end of the first rod portion of the balance bar is located in the first avoiding through hole, and the other end of the second rod portion of the balance bar is located in the second avoiding through hole.

7. The key structure of claim 1, wherein the first extension portion, the second extension portion and the third extension portion form a first through groove in the forward and reverse directions of the second direction, and the fourth extension portion, the fifth extension portion and the sixth extension portion form a second through groove in the forward and reverse directions of the second direction, when assembling, the other end of the first rod portion of the balance rod is disposed in the first through groove in the second direction, and the other end of the second rod portion of the balance rod is disposed in the second through groove in the second direction.

8. The key structure of claim 1, further comprising a key cap, wherein the first positioning groove, the second positioning groove and the balance bar are located between the key cap and the bottom plate, and the key cap is engaged with the connecting rod of the balance bar.

9. The key structure of claim 8, further comprising a lifting mechanism disposed between the key cap and the bottom plate, wherein the lifting mechanism is disposed between the first positioning groove and the second positioning groove, when the lifting mechanism moves along the third direction corresponding to the key cap being pressed, the connecting rod portion of the balance bar moves along the third direction, the other end of the first rod portion of the balance bar moves in the first positioning groove, the other end of the second rod portion of the balance bar moves in the second positioning groove, the third extending portion prevents the first rod portion from disengaging from the first end, and the sixth extending portion prevents the second rod portion from disengaging from the second end.

10. A keyboard comprising the key structure of any one of claims 1 to 9.

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