CN101625936B - Support structure, method of manufacturing support structure, key and keyboard - Google Patents

Abstract

The invention discloses a supporting structure for supporting a key cap of a key, a method for manufacturing the supporting structure, the key and a keyboard. The first supporting member has a first side arm, one end of which has a first connecting portion for movably connecting with the key cap, and the other end of which has a second connecting portion. A shaft hole is arranged between the first connecting part and the second connecting part. The second supporting member has a second side arm, one end of which has a third connecting portion for movably connecting the key cap relative to the first connecting portion, and the other end of which has a fourth connecting portion. A rotating shaft is arranged between the third connecting part and the fourth connecting part, and the rotating shaft is rotatably embedded in the shaft hole, so that the first supporting member and the second supporting member can rotate relatively.

Description

Support structure, method of manufacturing support structure, key and keyboard

technical field

The present invention relates to a support structure, a method for manufacturing the support structure, keys and keyboards using the support structure, and in particular, the present invention relates to a novel support structure, a method of manufacturing the support structure and using the support structure Structure of keys and keyboards.

Background technique

Generally speaking, the key actuation method on the keyboard is that the user presses the key cap to contact the switch, and then sends a signal to the processor, and then when the user stops applying force, the elastic body under the key cap will provide elastic recovery force to make the key The cap returns to its original position. Wherein, the keycap and the keyboard bottom plate can be connected with a supporting structure, so that the position of the keycap will not deviate from the original position due to actions such as pressing.

In the background art, the support structure is usually a scissors structure, that is, the support structure is composed of at least two components. One end of the two components is respectively pivotally connected to the keycap, and the other end is pivotally connected to the keyboard bottom plate. In addition, the central parts of the two components are pivotally connected to each other, through the central pivotal part, the two components can rotate relative to each other, so that the keycap can move perpendicular to the bottom plate.

However, in the current supporting structure of the keyboard keys, the two components are injection-molded by different molds, and the two components need to be removed and then assembled during assembly. Therefore, a large amount of manpower will be spent on the assembly procedure of the supporting structure, thereby increasing its production cost.

Contents of the invention

Therefore, an object of the present invention is to provide a novel supporting structure, which can be used to support key caps, so as to solve the above problems.

According to a specific embodiment, the supporting structure of the present invention includes a first supporting member and a second supporting member. The first support member has a first side arm, and the first side arm has a first stepped structure, which includes a first stepped surface and a second stepped surface. In addition, one end of the first side arm has a first connecting portion and the other end has a second connecting portion, wherein the first connecting portion can be movably connected to a keycap of a key. A shaft hole may be provided between the first connecting portion and the second connecting portion of the first side arm, and the shaft hole has a lateral opening on a turning surface of the first stepped surface and the second stepped surface.

In this particular embodiment, the second support member has a second side arm. One end of the second side arm has a third connecting portion, which can be movably connected to the key cap relative to the first connecting portion, and the other end has a fourth connecting portion. A rotating shaft may be provided between the third connecting portion of the second side arm and the fourth connecting portion. In this specific embodiment, the rotating shaft is rotatably fitted into the shaft hole, so that the first supporting member and the second supporting member can rotate relatively. The keycap of the key can move substantially perpendicular to the bottom plate through the supporting structure.

Another object of the present invention is to provide a method for manufacturing a support member to solve the above problems.

According to a specific embodiment, the method for manufacturing a support structure of the present invention may include the following steps: first, injection molding the first support member and the second support member in a common mold; then, placing the rotating shaft on the second support member The shaft hole on the first support member is rotationally fitted to complete the support structure.

In this specific embodiment, the first support member has a first side arm, and one end of the first side arm has a first connection portion, and the other end has a second connection portion. Wherein, the first connecting portion can be movably connected to a key cap of a key. A shaft hole may be provided between the first connecting portion and the second connecting portion of the first side arm. The second support member has a second side arm, and one end of the second side arm has a third connection portion, and the other end has a fourth connection portion, wherein the third connection portion can be movably connected relative to the first connection portion keycap. A rotating shaft may be provided between the third connecting portion and the fourth connecting portion of the second side arm. In this specific embodiment, the first support member and the second support member are formed in a common mold at corresponding positions, and the second support member is partially formed within the U-shaped range of the first support member, wherein the rotating shaft and the shaft The holes are located at corresponding locations in the common mould. In this way, the rotating shaft can be easily and rotatably fitted into the shaft hole to complete the supporting structure.

Another object of the present invention is to provide a key using the above support structure.

According to a specific embodiment, the key of the present invention includes a bottom plate, a key cap and a supporting structure. The support structure includes a first support member and a second support member. The first support member has a first side arm, and the first side arm has a first stepped structure, which includes a first stepped surface and a second stepped surface. In addition, one end of the first side arm has a first connecting portion and the other end has a second connecting portion, wherein the first connecting portion can be movably connected to a keycap of a key and the second connecting portion can be movably connected to the bottom plate . A shaft hole may be provided between the first connecting portion and the second connecting portion of the first side arm, and the shaft hole has a lateral opening on a turning surface of the first stepped surface and the second stepped surface.

In this particular embodiment, the second support member has a second side arm. One end of the second side arm has a third connecting portion, which can be movably connected to the key cap relative to the first connecting portion, and the other end has a fourth connecting portion, which can be movably connected relative to the second connecting portion bottom plate. A rotating shaft may be provided between the third connecting portion of the second side arm and the fourth connecting portion. In this specific embodiment, the rotating shaft is rotatably fitted into the shaft hole, so that the first supporting member and the second supporting member can rotate relatively. The keycap of the key can move substantially perpendicular to the bottom plate through the supporting structure.

Another object of the present invention is to provide a keyboard composed of the keys of the above specific embodiments.

According to a specific embodiment, the keyboard of the present invention includes a bottom plate, a plurality of key caps and a plurality of supporting structures. Each support structure is respectively arranged between each key cap and the bottom plate to support each key cap.

In this specific embodiment, the support structure includes a first support member and a second support member. The first support member has a first side arm, and the first side arm has a first stepped structure, which includes a first stepped surface and a second stepped surface. In addition, one end of the first side arm has a first connecting portion and the other end has a second connecting portion, wherein the first connecting portion can be movably connected to a keycap of a key and the second connecting portion can be movably connected to the bottom plate . A shaft hole may be provided between the first connecting portion and the second connecting portion of the first side arm, and the shaft hole has a lateral opening on a turning surface of the first stepped surface and the second stepped surface.

Additionally, the second support member has a second side arm. One end of the second side arm has a third connecting portion, which can be movably connected to the key cap relative to the first connecting portion, and the other end has a fourth connecting portion, which can be movably connected relative to the second connecting portion bottom plate. A rotating shaft may be provided between the third connecting portion of the second side arm and the fourth connecting portion. In this specific embodiment, the rotating shaft is rotatably fitted into the shaft hole, so that the first supporting member and the second supporting member can rotate relatively. The keycap of the key can move substantially perpendicular to the bottom plate through the supporting structure.

The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram illustrating a support structure according to a specific embodiment of the present invention;

2 is a top view illustrating a support structure according to another embodiment of the present invention;

3 is a cross-sectional view illustrating a button according to a specific embodiment of the present invention;

FIG. 4 is an exploded view illustrating the button of FIG. 3;

FIG. 5 is a flow chart illustrating the steps of a method for manufacturing a support structure according to an embodiment of the present invention.

Description of main component symbols

1. 22: Support structure 10: The first support member

12: Second support member 100: First side arm

102: The first connection part 104: The second connection part

106: Shaft hole 1000: The first step surface

1002: Second step surface 1060: Lateral opening

120: Second side arm 122: Third connecting part

124: The fourth connection part 126: Rotating shaft

1200: The third step surface 1202: The fourth step surface

1204: Accommodating area 2: Button

20: Button keycap 24: Elastic body

26: Thin film circuit board 28: Bottom plate

280: Depressed part 282: Support part

S30, S32: process steps

Detailed ways

Please refer to FIG. 1 . FIG. 1 is a schematic diagram illustrating a support structure 1 according to a specific embodiment of the present invention. As shown in FIG. 1 , the support structure 1 includes a first support member 10 and a second support member 12 .

In this specific embodiment, the first support member 10 is U-shaped. However, in practice, the appearance of the first support member 10 can be determined according to the needs of users or designers, and is not limited to the specific embodiments listed in this specification. The first side arm 100 of the first supporting member 10 has a stepped structure, which includes a first stepped surface 1000 and a second stepped surface 1002 . One end of the first side arm 100 is provided with a first connecting portion 102 and the other end is provided with a second connecting portion 104 . In addition, a shaft hole 106 is provided between the first connecting portion 102 and the second connecting portion 104 . In this specific embodiment, the shaft hole 106 has a lateral opening 1060 on a turning surface between the first stepped surface 1000 and the second stepped surface 1002 .

In addition, one end of the second side arm 120 of the second supporting member 12 is provided with a third connection part 122 and the other end is provided with a fourth connection part 124 . There is a stepped structure between the third connecting portion 122 and the fourth connecting portion 124, which includes the third stepped surface 1200 and the fourth stepped surface 1202, and the rotating shaft 126 is arranged on the turning surface of the third stepped surface 1200 and the fourth stepped surface 1202 superior. In this specific embodiment, the rotating shaft 126 is rotatably fitted in the shaft hole 106 so that the first supporting member 10 and the second supporting member 12 can rotate relatively.

In practice, the first connecting portion 102 can be movably connected to the key cap, and the third connecting portion 122 can correspond to the first connecting portion 102 and can be movably connected to the key cap. On the other hand, in practice, the second connecting portion 104 can be movably connected to the bottom plate of the keyboard, and the fourth connecting portion 124 can correspond to the second connecting portion 104 and can be movably connected to the bottom plate. Thereby, the support structure 1 can support the key caps and enable the key caps to move substantially perpendicularly to the bottom plate.

Further, in practice, at least one of the first connecting portion 102 and the third connecting portion 122 is slidably connected to the key cap, and similarly, at least one of the second connecting portion 104 and the fourth connecting portion 124 A connection to the base plate is slidable. Since the connection between the support structure 1, the key cap and the bottom plate has a gap for each connection part of the support structure 1 to slide, so when the key cap is pressed and moves toward the bottom plate, the key cap can press against the bottom plate without Improper stress is applied to the supporting structure 1, and even causes the supporting structure 1 to be damaged.

In this specific embodiment, the rotating shaft 126 of the first supporting member 10 enters into the shaft hole 106 through the side opening 1060 and rotatably fits into the shaft hole 106 . Wherein, the lateral opening 1060 can be smaller than the diameter of the shaft hole 106 , so when the rotating shaft 126 enters the shaft hole 106 , the lateral opening 1060 can restrict the rotating shaft 126 so that the rotating shaft 126 cannot leave the shaft hole 106 .

Please refer to FIG. 2 . FIG. 2 is a top view illustrating a support structure 1 according to another embodiment of the present invention. As shown in Figure 2, the depth of the shaft hole 106 in this specific embodiment is greater than the turning surface between the first stepped surface 1000 and the second stepped surface 1002, and the length of the rotating shaft 126 is also greater than the third stepped surface 1200 and the fourth stepped surface The turning point of 1202. Therefore, when the rotating shaft 126 enters the shaft hole 106 through the side opening 1060, the rotating shaft 126 can extend into the bottom of the shaft hole 106 to be rotatably fitted in the shaft hole 106, and the rotating shaft 126 can be engaged in the shaft hole 106 without As for breaking away from the shaft hole 106 . In addition, in this specific embodiment, the top of the rotating shaft 126 and one end of the first side arm 100 have corresponding slopes, so that the rotating shaft 126 can slide into the first stepped surface 1000 along the slope and further enter the shaft through the side opening 1060. Hole 106. Please note that other parts of the support structure 1 in this specific embodiment are the same as those in the previous specific embodiment, and will not be repeated here.

Please refer to Figure 1 and Figure 2 again. As shown in FIG. 1 and FIG. 2 , the second side arm 120 of the second support member 12 of the support structure 1 in each of the above specific embodiments has an accommodating area 1204 adjacent to the rotating shaft 126 . In practice, when the first support member 10 rotates relative to the second support member 12, the accommodating area 1204 can accommodate part of the first support member 10 constituting the side opening 1060, so that the part of the first support member 10 constituting the side opening 1060 The member 10 and the second supporting member 12 are not pressed against each other and cannot rotate.

In the above specific embodiments, the first supporting member 10 is a symmetrical structure, that is, the first supporting member 10 has a structure symmetrical to that of the first side arm 100 (as shown in FIG. 1 and FIG. 2 ). Likewise, the second supporting member 12 is also a symmetrical structure. Therefore, in practice, the first supporting member 10 and the second supporting member 12 can connect the key caps with the two first connecting parts 102 and the third connecting parts 122 that are symmetrical to each other, and can connect the two second connecting parts that are symmetrical with each other. The connecting portion 104 and the two symmetrical fourth connecting portions 124 are connected to the bottom plate. In addition, the first supporting member 10 and the second supporting member 12 can rotate relative to each other through the two symmetrical rotating shafts 126 and the two shaft holes 106 .

Please refer to FIG. 3 . FIG. 3 is a cross-sectional view of the button 2 according to a specific embodiment of the present invention. As shown in FIG. 3 , the key 2 includes a key cap 20 , a supporting structure 22 , an elastic body 24 , a film circuit board 26 and a bottom plate 28 .

In this specific embodiment, the button keycap 20 is arranged on the bottom plate 28 and connected through the support structure 22 , wherein each unit of the support structure 22 is the same as that of the above specific embodiment, and will not be repeated here. The thin film circuit board 26 is disposed between the key cap 20 and the bottom plate 28 , and a switch (not shown in the figure) is disposed opposite to the key cap. The elastic body 24 is disposed between the button cap 20 and the thin film circuit board 26 , which can provide elastic recovery force to return the button cap to the position before the force is applied. In practice, when the key cap 20 is pressed down, the elastic body 24 can press against and trigger the switch to generate a trigger signal.

Please refer to FIG. 4 . FIG. 4 is an exploded view of the button 2 in FIG. 3 . As shown in FIG. 4 , the bottom plate 28 is recessed downwards relative to the keycap 20 to form a recessed portion 280 , and a support portion 282 is protruded on the recessed portion 280 relative to the switch of the film circuit board 26 . In practice, when the key cap 20 is pressed down, the elastic body 24 can press and trigger the switch on the support portion 282 to generate a trigger signal.

In practice, since the recessed portion 280 is recessed downward from the bottom plate 28, and the supporting portion 282 protrudes from the recessed portion 280, particles such as dust will fall into the recessed portion 280 instead of accumulating on the supporting portion 282. switch. In this way, the sensitivity and function of the switch can be prevented from being affected by dust accumulation.

According to another specific embodiment, the keyboard of the present invention may include a plurality of keys 2 . Wherein, each unit of each button 2 is the same as that corresponding to the previous specific embodiment, and will not be repeated here. In other words, the supporting structures and keys of the above specific embodiments can be applied to form the keyboard of this specific embodiment.

Please refer to FIG. 5 . FIG. 5 is a flow chart illustrating the steps of a method for manufacturing a support structure according to an embodiment of the present invention. As shown in Figure 5, the method for manufacturing a support structure includes the following steps: In step S30, injection molding of the first support member and the second support member in a common mold; then, in step S32, the The rotating shaft is rotatably fitted into the shaft hole of the first supporting member to complete the supporting structure.

In this specific embodiment, the first support member and the second support member are correspondingly formed in a common mold, wherein the first support member is in the shape of a ㄇ, and the second support member can be partially formed on the ㄇ of the first support member type range. In addition, when the first supporting member and the second supporting member are correspondingly formed in a common mold, a lateral opening relative to the rotating shaft is formed on the shaft hole for the rotating shaft to enter into the shaft hole. Therefore, in practice, the rotating shaft can be rotatably fitted into the shaft hole in a simple manner without going through other alignment procedures. For example, since the first support member and the second support member are formed at opposite positions of a common mold, the rotating shaft can directly enter the shaft hole by manually or mechanically pinching the first support member and the second support member. Rotately fitted in the shaft hole. The first supporting member and the second supporting member of the supporting structure of this specific embodiment can relatively rotate through the rotating shaft and the shaft hole.

In addition, in the support structure manufactured by the method for manufacturing a support structure in this specific embodiment, the first support member has a first side arm, and one end of the first side arm has a first connection portion and the other end has a second connection portion , the shaft hole is disposed between the first connecting portion and the second connecting portion. The second supporting member has a second side arm, one end of which has a third connecting portion and the other end has a fourth connecting portion, and the rotating shaft is disposed between the third connecting portion and the fourth connecting portion.

In practice, the above-mentioned first connecting portion and third connecting portion can be movably connected to a keycap of a key, and the second connecting portion and the fourth connecting portion can be movably connected to a bottom plate. Therefore, the supporting structure manufactured by the manufacturing method of the supporting member in this specific embodiment can be used for the keys in the keyboard to support the key caps of the keys.

Compared with the background technology, the support structure of the present invention has a first support member and a second support member, wherein the first support member has a shaft hole, and the shaft hole has a lateral opening so that the rotation shaft of the second support member can pass through the side The opening enters the shaft hole and rotatably fits into the shaft hole, so that the first supporting member and the second supporting member can rotate relatively. Therefore, the supporting structure of the present invention can be applied to keys of a keyboard. In addition, the first support member and the second support member of the support structure can be formed in a common mold by injection molding, and both have relative positions, so that the first support member and the second support member can be easily combined to form a support The structure does not need to go through other alignment procedures, therefore, the manpower requirement for assembling the supporting components can be reduced, further reducing the production cost.

Through the above detailed description of the preferred embodiments, it is hoped that the features and spirit of the present invention can be described more clearly, rather than limiting the scope of the present invention by the preferred embodiments disclosed above. On the contrary, the intention is to cover various modifications and equivalent arrangements within the scope of the appended claims of the present invention. Therefore, the scope of the claims applied for in the present invention should be interpreted in the broadest way based on the above description, so as to cover all possible changes and arrangements with equivalents.

Claims (29)

1. supporting construction, in order to support a button keycap, this supporting construction comprises:

First supporting member; Have one first side arm, this first side arm has one first hierarchic structure, and this first hierarchic structure comprises one first cascaded surface and second cascaded surface; One end of this first side arm has one first connecting portion in order to this button keycap that is movably connected; The other end of this first side arm has one second connecting portion, between this first connecting portion and this second connecting portion axis hole is set, and this axis hole has the turnover face that a lateral openings is arranged at first cascaded surface and second cascaded surface; And

Second supporting member; Have one second side arm, an end of this second side arm has one the 3rd connecting portion in order to relative this first connecting portion this button keycap that is movably connected, and the other end of this second side arm has one the 4th connecting portion; Between the 3rd connecting portion and the 4th connecting portion one rotating shaft is set; And chimeric rotationally this axis hole of this rotating shaft causes this first supporting member and this second supporting member relatively to rotate, and wherein this second side arm has one second hierarchic structure; This second hierarchic structure comprises one the 3rd cascaded surface and quadravalence tread, and this rotating shaft is positioned at the turnover face of the 3rd cascaded surface and quadravalence tread.

2. supporting construction as claimed in claim 1, wherein this first supporting member is the ㄇ type.

3. supporting construction as claimed in claim 1, wherein at least one in this first connecting portion and the 3rd connecting portion is to articulate this button keycap slidably.

4. supporting construction as claimed in claim 1, wherein this second connecting portion and the 4th connecting portion base plate that relatively is movably connected.

5. supporting construction as claimed in claim 4, wherein at least one in this second connecting portion and the 4th connecting portion is to articulate this base plate slidably.

6. supporting construction as claimed in claim 1, wherein this lateral openings is with also being embedded in this axis hole rotationally so that this rotating shaft can get into this axis hole from this lateral openings.

7. supporting construction as claimed in claim 6; Wherein has contiguous this rotating shaft in a disposal area on this second side arm; When this first supporting member rotated with respect to this second supporting member, part first supporting member that constitutes this lateral openings can be contained in this disposal area.

8. method of making a supporting construction, this supporting construction is in order to support a button keycap, and this method comprises the following step:

Injection mo(u)lding one first supporting member and one second supporting member are in altogether with mould; Wherein this first supporting member has one first side arm; One end of this first side arm has one first connecting portion in order to this button keycap that is movably connected; The other end of this first side arm has one second connecting portion, between this first connecting portion and this second connecting portion axis hole is set; Wherein this second supporting member has one second side arm; One end of this second side arm has one the 3rd connecting portion in order to relative this first connecting portion this button keycap that is movably connected; The other end of this second side arm has one the 4th connecting portion, between the 3rd connecting portion and the 4th connecting portion one rotating shaft is set; And

With chimeric rotationally this axis hole of this rotating shaft, cause this first supporting member and this second supporting member relatively to rotate, to accomplish this supporting construction;

On the side of this axis hole, form a lateral openings, cause this rotating shaft to get into this axis hole and to be embedded in this axis hole rotationally from this lateral openings;

On this first side arm, form one first hierarchic structure, this first hierarchic structure comprises one first cascaded surface and second cascaded surface, and this lateral openings is positioned at the turnover face of this first cascaded surface and this second cascaded surface; And

On this second side arm, form one second hierarchic structure, this second hierarchic structure comprises one the 3rd cascaded surface and quadravalence tread, and this rotating shaft is positioned at the turnover face of the 3rd cascaded surface and quadravalence tread,

Wherein this first supporting member and this second supporting member are formed in this common die accordingly.

9. method as claimed in claim 8, wherein this first supporting member is the ㄇ type, and this second supporting member part is formed in the ㄇ type scope of this first supporting member.

10. method as claimed in claim 8, wherein this second connecting portion is formed between this rotating shaft and the 4th connecting portion, and the 4th connecting portion is formed between this axis hole and this second connecting portion.

11. method as claimed in claim 8, wherein at least one in this first connecting portion and the 3rd connecting portion is to articulate this button keycap slidably.

12. a button comprises:

Base plate;

The button keycap is arranged on this base plate; And

Supporting construction comprises:

First supporting member; Has one first side arm; This first side arm has one first hierarchic structure; This first hierarchic structure comprises one first cascaded surface and second cascaded surface, and an end of this first side arm has one first connecting portion in order to this button keycap that is movably connected, and the other end of this first side arm has one second connecting portion in order to this base plate that is movably connected; Between this first connecting portion and this second connecting portion axis hole is set, this axis hole has the turnover face that a lateral openings is arranged at first cascaded surface and second cascaded surface; And

Second supporting member; Has one second side arm; One end of this second side arm has one the 3rd connecting portion in order to relative this first connecting portion this button keycap that is movably connected; The other end of this second side arm has one the 4th connecting portion in order to relative this second connecting portion this base plate that is movably connected, and between the 3rd connecting portion and the 4th connecting portion one rotating shaft is set, and chimeric rotationally this axis hole of this rotating shaft; Cause this first supporting member and this second supporting member relatively to rotate; Wherein this second side arm has one second hierarchic structure, and this second hierarchic structure comprises one the 3rd cascaded surface and quadravalence tread, and this rotating shaft is positioned at the turnover face of the 3rd cascaded surface and quadravalence tread.

13. button as claimed in claim 12, wherein this first supporting member is the ㄇ type.

14. button as claimed in claim 12, wherein at least one in this first connecting portion and the 3rd connecting portion is to articulate this button keycap slidably.

15. button as claimed in claim 12, wherein at least one in this second connecting portion and the 4th connecting portion is to articulate this base plate slidably.

16. button as claimed in claim 12, wherein this lateral openings is with also being embedded in this axis hole rotationally so that this rotating shaft can get into this axis hole from this lateral openings.

17. button as claimed in claim 12 also comprises a film circuit board, is arranged between this button keycap and this base plate, wherein, relative this button keycap keycap place is provided with a switch on this film circuit board.

18. button as claimed in claim 17; Wherein the zone of relative this button keycap is recessed to form a depressed part downwards on this base plate; And this switch place is convexly equipped with a support portion relatively on this depressed part, and when this button keycap pressed to this support portion, this switch produced a triggering signal.

19. button as claimed in claim 17 also comprises an elastomer, is arranged between this button keycap and this film circuit board.

20. button as claimed in claim 12; Wherein has contiguous this rotating shaft in a disposal area on this second side arm; When this first supporting member rotated with respect to this second supporting member, part first supporting member that constitutes this lateral openings can be contained in this disposal area.

21. a keyboard comprises:

Base plate;

A plurality of button keycaps are arranged on this base plate; And

A plurality of supporting constructions are arranged between these a plurality of button keycaps and this base plate, and in order to support these a plurality of button keycaps, these a plurality of supporting constructions comprise respectively:

First supporting member; Has one first side arm; This first side arm has one first hierarchic structure; This first hierarchic structure comprises one first cascaded surface and second cascaded surface, and an end of this first side arm has one first connecting portion in order to this button keycap that is movably connected, and the other end of this first side arm has one second connecting portion in order to this base plate that is movably connected; Between this first connecting portion and this second connecting portion axis hole is set, this axis hole has the turnover face that a lateral openings is arranged at first cascaded surface and second cascaded surface; And

Second supporting member; Has one second side arm; One end of this second side arm has one the 3rd connecting portion in order to relative this first connecting portion this button keycap that is movably connected; The other end of this second side arm has one the 4th connecting portion in order to relative this second connecting portion this base plate that is movably connected, and between the 3rd connecting portion and the 4th connecting portion one rotating shaft is set, and chimeric rotationally this axis hole of this rotating shaft; Cause this first supporting member and this second supporting member relatively to rotate; Wherein this second side arm has one second hierarchic structure, and this second hierarchic structure comprises one the 3rd cascaded surface and quadravalence tread, and this rotating shaft is positioned at the turnover face of the 3rd cascaded surface and quadravalence tread.

22. keyboard as claimed in claim 21, wherein this first supporting member is the ㄇ type.

23. keyboard as claimed in claim 21 also comprises a film circuit board, is arranged between these a plurality of button keycaps and this base plate, wherein, reciprocity mutually this button keycap place is provided with a switch on this film circuit board.

24. keyboard as claimed in claim 23 also comprises a plurality of elastomers, is arranged at respectively between these a plurality of button keycaps and this film circuit board.

25. keyboard as claimed in claim 23; Wherein the zone of relative these a plurality of button keycaps is recessed to form a depressed part downwards on this base plate; And this switch place is convexly equipped with a support portion relatively on this depressed part, and when these a plurality of button keycaps pressed to this support portion, this switch produced a triggering signal.

26. keyboard as claimed in claim 21, wherein at least one in this first connecting portion and the 3rd connecting portion is to articulate this button keycap slidably.

27. keyboard as claimed in claim 21, wherein at least one in this second connecting portion and the 4th connecting portion is to articulate this base plate slidably.

28. keyboard as claimed in claim 21, wherein this lateral openings is with also being embedded in this axis hole rotationally so that this rotating shaft can get into this axis hole from this lateral openings.

29. keyboard as claimed in claim 21; Wherein has contiguous this rotating shaft in a disposal area on this second side arm; When this first supporting member rotated with respect to this second supporting member, part first supporting member that constitutes this lateral openings can be contained in this disposal area.

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