CN108281316A - Keyboard with a keyboard body - Google Patents

Abstract

The invention relates to a keyboard which comprises keys, a bottom plate and a buffer strip, wherein the keys comprise key caps and balance rods connected with the key caps. The first end of the buffering strip is fixed in the first hook of the key cap, and the second end of the buffering strip is fixed in the second hook of the key cap. Meanwhile, the buffer strip can be abutted against the balance rod to fill the gap between the balance rod and the first clamping hook, so that the chance that the balance rod impacts the first clamping hook is reduced. Therefore, the keyboard of the invention can reduce noise.

Description

keyboard

technical field

The invention relates to an input device, in particular to a keyboard with a plurality of keys.

Background technique

Common computer peripheral input devices include a mouse, a keyboard, and a trackball. The keyboard can directly input text and symbols to the computer, so it is highly valued by users and input device manufacturers. The subject of this case is the keyboard.

Please refer to FIG. 1 , which is a schematic diagram of the appearance and structure of an existing keyboard. The surface of the conventional keyboard 1 has a plurality of keys 10, 10', the key 10 is classified as a general-sized key, and the key 10' is classified as a longer-sized key. Wherein, the length of the key 10 is slightly greater than its width, and the length L1 of the key 10' is much greater than its width W1. A plurality of said keys 10, 10' are for the user to press with fingers to generate a corresponding signal to the computer, so that the computer executes the function of the pressed key. Generally speaking, pressing the keys 10, 10' can input English letters and other symbols, numbers or perform various functions (such as F1 ~ F12, Delete) and so on. Wherein the existing keyboard 1 is a keyboard for a notebook computer.

Next, the internal structure of the conventional keyboard will be described. Please refer to FIGS. 1 to 3 at the same time. FIG. 2 is an exploded view of the existing keyboard, and FIG. 3 is an exploded view of the existing keyboard from another perspective. The existing keyboard 1 includes a plurality of keys 10, 10', a bottom plate 11 and a membrane switch circuit 12, and the membrane switch circuit 12 has a plurality of key switches 121 corresponding to the plurality of keys 10, 10'. The key 10, 10' includes a key cap 101, a scissors-type connection element 102, and an elastic rubber body 103. The scissors-type connection element 102 is respectively connected to the key cap 101 and the metal bottom plate 11, and it includes a first frame 1021 and a second frame 1022, The second frame 1022 is pivotally connected to the first frame 1021 so that the first frame 1021 and the second frame 1022 can swing relative to each other. In addition, the elastic rubber body 103 is disposed between the key cap 101 and the metal bottom plate 11 , and has a contact portion 1031 .

When the user touches the key cap 101 of any key 10, 10', the key cap 101 moves downward relative to the metal bottom plate 11, so that the first frame 1021 and the second frame 1022 of the scissor-type connection element 102 will be opened and closed. The state is changed to a folded state, and the downwardly moving key cap 101 will push against the elastic rubber body 103, causing the abutting portion 1031 of the elastic rubber body 103 to deform and trigger the corresponding key switch 121, so that the membrane switch The circuit 12 generates a corresponding key signal. And when the user no longer touches the buttons 10, 10', the button cap 101 will move upward relative to the metal bottom plate 11 in response to the elastic force generated by the elastic rubber body 103 recovering from the deformed state. At this time, the first frame 1021 and the The second frame 1022 will change from the folded state to the open state, and the keycap 101 will return to the position before being pressed.

In the existing keyboard 1, the structure of some keys 10' whose length L1 is much larger than the width W1 is different from that of the keys 10. ', the key cap 101 is prone to shaking, which affects the smoothness of the operation of the key 10', and even affects the user's touch feeling. Therefore, the button 10' is further provided with a special mechanism to improve the smoothness of its operation. The button 10' also includes a first balance bar 104, a second balance bar 105 and a plurality of button cap hooks 106, and the first balance bar 104 includes a first link part 1041 and two first hook parts 1042, the two first The hook portions 1042 are respectively located at two ends of the first balance pole 104 . The second balance pole 105 includes a second link portion 1051 and two second hook portions 1052 , and the two second hook portions 1052 are respectively located at two ends of the second balance pole 105 . In addition, the metal bottom plate 11 includes a first connection frame 111 and a second connection frame 112 , and the first connection frame 111 and the second connection frame 112 respectively extend upward and pass through the membrane switch circuit 12 . The first connecting frame 111 includes a first hook hole 1111 and a third hook hole 1112, and the second connecting frame 112 includes a second hook hole 1121 and a fourth hook hole corresponding to the first hook hole 1111 and the third hook hole 1112 respectively. Hole 1122.

Wherein, the first link part 1041 of the first balance bar 104 and the second link part 1051 of the second balance bar 105 are pivotally connected to the plurality of key cap hooks 106 of the key cap 101 of the key 10', and the first The two first hook portions 1042 of the balance pole 104 respectively pass through the first hook holes 1111 of the first connecting frame 111 and the second hook holes 1121 of the second connecting frame 112 . On the other hand, the two second hook portions 1052 of the second balance pole 105 respectively pass through the third hook holes 1112 of the first connecting frame 111 and the fourth hook holes 1122 of the second connecting frame 112 .

Please refer to FIG. 4 . FIG. 4 is a schematic diagram of the operation of the first balance bar and the second balance bar of the conventional keyboard. When the key cap 101 of the key 10' moves up or down relative to the metal bottom plate 11, the first balance bar 104 moves repeatedly to the first direction D11 or the second direction D12, and to the first rotation direction D13 or the second rotation direction. Direction D14 is reversed. Similarly, the second balance pole 105 will also repeatedly move toward the first direction D11 or the second direction D12, and turn over toward the first rotation direction D13 or the second rotation direction D14. The purpose of setting the first balance bar 104 and the second balance bar 105 is to keep the key 10' in balance when moving up or down relative to the metal base 11 without tilting, and meanwhile increase the strength of the key cap 101.

However, there are two problems in the existing keyboard 1. First, the first balance bar 104 and the second balance bar 105 are respectively connected to the corresponding plurality of key cap hooks 106, and the first balance bar 104 is connected to the plurality of keys. Although the cap hooks 106 are engaged with each other, there is still a gap between them, so the first balance bar 104 frequently hits the plurality of key cap hooks 106 , causing noise. The second balance pole 105 also has the same phenomenon, so it will not be repeated here. Second, when the user touches the edge of the key cap 101 (for example, the part of the key cap 101 that is farther away from the key cap hook 106), the touch force applied by the user to the key cap 101 is difficult to transmit to the first The balance bar 104 or the second balance bar 105 makes the linkage between the first balance bar 104 or the second balance bar 105 and the key cap 101 not smooth, which affects the touch feeling of the key.

Therefore, there is a need for a keyboard that can reduce noise.

Contents of the invention

The object of the present invention is to provide a keyboard capable of reducing noise.

Another object of the present invention is to provide a keyboard that can provide a good touch feeling.

In a preferred embodiment, the present invention provides a keyboard including a key, a switch circuit board, a bottom plate and a buffer bar. The key includes a key cap exposed outside the keyboard and a balance bar, the key cap has a first hook, and the balance bar is connected to the key cap and fixed in the first hook. The switch circuit board is located under the key, and is used for being triggered by the key to output a key signal. The bottom plate is arranged under the switch circuit board and connected to the balance bar for bearing the button. A first end of the buffer strip is fixed in the first hook and abuts against the balance bar, so as to fill the gap between the balance bar and the first hook, and prevent the balance bar from colliding with the first hook. The hook.

In a preferred embodiment, the first hook includes a support portion and a hook portion, the support portion is disposed on an inner surface of the keycap and is located on a first side of the first hook, for to support the balance pole. The hook portion is disposed on the inner surface of the key cap and is located on a second side of the first hook, and is used for engaging with the first end of the buffer strip. Wherein, the buffer strip includes a top, an extension hook and an engaging cylinder, the top is arranged at the first end of the buffer strip and on a first side wall of the buffer strip, for resisting Top the balance bar. The extension hook portion is disposed on the first end of the buffer strip and on a second side wall of the buffer strip, and is used for engaging with the hook portion. The engaging column is disposed on a second end of the buffer bar and is fixed on the key cap or the bottom plate.

In short, the keyboard of the present invention is provided with a buffer bar between the key cap and the balance bar, and the buffer bar is fixed between the key cap and the bottom plate, thereby filling the gap between the key cap and the balance bar, and using the buffer bar to resist Top the balance bar, so that the balance bar can be close to the key cap, and reduce the chance of the balance bar hitting the key cap. On the other hand, the buffer bar can also be used as a connecting bridge between the balance bar and the keycap, which can transmit the touch force received by the keycap to the balance bar, so that the balance bar can smoothly move with the keycap to enhance Its tactile feel.

Description of drawings

FIG. 1 is a schematic diagram of the appearance and structure of an existing keyboard.

Fig. 2 is a schematic diagram of an exploded structure of an existing keyboard.

Fig. 3 is an exploded schematic view of the existing keyboard from another perspective.

FIG. 4 is a schematic diagram of the operation of the first balance bar and the second balance bar of the conventional keyboard.

Fig. 5 is a schematic diagram of the appearance structure of the keyboard in the first preferred embodiment of the present invention.

Fig. 6 is an exploded schematic diagram of the structure of the keyboard in the first preferred embodiment of the present invention.

FIG. 7 is a structural schematic diagram of another viewing angle of the key cap of the keyboard of the present invention in the first preferred embodiment.

Fig. 8 is a schematic cross-sectional view of the structure of the keyboard of the present invention in the first preferred embodiment.

Fig. 9 is an exploded schematic view of the structure of the keyboard of the present invention in the second preferred embodiment.

FIG. 10 is a structural schematic diagram of another viewing angle of the key cap of the keyboard of the present invention in the second preferred embodiment.

Fig. 11 is a schematic cross-sectional view of the structure of the keyboard of the present invention being pressed in the second preferred embodiment.

Fig. 12 is a schematic cross-sectional view of the structure of the keyboard in the second preferred embodiment of the present invention.

【Symbol Description】

1, 2, 3 keyboard

10, 10’, 20, 20’, 30’ buttons

11 metal bottom plate

12 Membrane switch circuit

21, 31 Bottom plate

22, 32 switch circuit board

23, 33 buffer strip

101, 201, 301 Keycaps

102, 202, 302 Scissor connection elements

103 elastic rubber body

104, 204, 304 first balance bar

105, 205, 305 second balance bar

106, 2013, 3012 button cap hook

111 The first connecting frame

112 The second connecting frame

121, 221 key switch

211, 311 Bottom plate hook

212, 312 connecting frame

203, 303 Elastic elements

222 opening

231, 331, 1031 to the top

232, 332 extension hook

233, 333 clamping cylinder

234, 334 First side wall of bumper bar

235, 335 Second side wall of bumper bar

313, 2012 Second card hook

1021 First frame

1022 Second frame

1041, 2041, 3041 first link part

1042, 2042, 3042 the first hook

1051, 2051, 3051 Second link part

1052, 2052, 3052 second hook

1111, 2121 first hook hole

1112 The third hook hole

1111, 2122 Second hook hole

1122 The fourth hook hole

2011, 3011 the first hook

2014, 3014 support department

2015, 3015 Hook Department

D11 first direction

D12 Second direction

D13 First direction of rotation

D14 Second direction of rotation

L1, L2 key cap length

W1, W2 The width of the key cap

Detailed ways

In view of the problems caused by the prior art, the present invention provides a keyboard which can solve the problems of the prior art. Firstly, the structure of the keyboard of the present invention will be described. Please refer to FIG. 5 , which is a schematic diagram of the appearance structure of the keyboard of the present invention in the first preferred embodiment. The keyboard 2 of the present invention includes a plurality of keys 20, 20', which are exposed outside the keyboard 2. The plurality of keys 20, 20' can be pressed by the user's fingers to generate corresponding signals to be connected to the keyboard 2. A computer (not shown in the figure), causing the computer to execute the function of the pressed key. Wherein, the length of the key 20 is slightly greater than its width, and the length L2 of the key 20' is much greater than its width W2.

Next, the internal structure of the keyboard 2 of the present invention will be described. Please refer to FIG. 6 and FIG. 7 at the same time. FIG. 6 is an exploded schematic diagram of the structure of the keyboard of the present invention in the first preferred embodiment, and FIG. 7 is another view of the key cap of the keyboard of the present invention in the first preferred embodiment. Schematic. The keyboard 2 of the present invention also includes a bottom plate 21, a switch circuit board 22 and a buffer bar 23 in addition to a plurality of keys 20, 20'. The bottom plate 21 is arranged under the plurality of keys 20, 20', and can be connected to a plurality of keys 20, 20'. 20'. The switch circuit board 22 is located between the plurality of keys 20, 20' and the bottom plate 21, and its function is to be triggered by the keys 20, 20' to output corresponding key signals. The switch circuit board 22 includes a key switch 221 and a plurality of openings 222 Each key switch 221 in the switch circuit board 22 corresponds to a key 20, 20', which can be triggered by the key 20, 20' to output a corresponding key signal.

Each key 20' includes a key cap 201, at least one scissor-type connection element 202, an elastic element 203, a first balance bar 204 and a second balance bar 205. The scissors-type connection element 202 is connected to the corresponding key cap 201 and the base plate 21 , which can fix the key cap 201 on the base plate 21 and move the key cap 201 relative to the base plate 21 . The elastic element 203 is located between the corresponding key cap 201 and the switch circuit board 22 and corresponds to the key switch 221 , and its function is to be pushed against by the corresponding key cap 201 to abut against the corresponding key switch 221 . In this preferred embodiment, the bottom plate 21 is made of metal material, the elastic element 203 is an elastic rubber body, and the scissor-type connecting element 202 is made of plastic material.

7 and 8, the first balance bar 204 and the second balance bar 205 are connected to the keycap 201, the first balance bar 204 includes a first link part 2041 and two first hook parts 2042, the first link part The 2041 can be connected to the keycap 201 , and the two first hook parts 2042 are respectively located at one end and the other end of the first link part 2041 . Similar to the first balance bar 204, the second balance bar 205 includes a second link part 2051 and two second hook parts 2052, the second link part 2051 can be connected to the button cap 201, and the two second hook parts 2052 They are respectively located at one end and the other end of the second link portion 2052 . In this preferred embodiment, the first link part 2041 and the two first hook parts 2042 are integrally formed, and the first balance bar 204 can be made of metal material or plastic material. The same is true for the second balance pole 205 , and will not be repeated here.

The bottom plate 21 includes a plurality of bottom plate hooks 211 and a plurality of connecting frames 212 , the bottom plate hooks 211 can be connected with the scissor-type connecting element 202 to fix the scissor-type connecting element 202 on the bottom plate 21 . The connecting frame 212 is disposed on the bottom plate 21 and passes through the opening 222 of the switch circuit board 22 to be located above the switch circuit board 22 , so it can be connected with the first balance bar 204 and the second balance bar 205 . The connecting frame 212 includes a first hook hole 2121 and a second hook hole 2122 , so that the first hook portion 2042 of the first balance pole 204 passes through the first hook hole 2121 to fix the first balance pole 204 on the base plate 21 . On the other hand, the second hook portion 2052 of the second balance pole 205 passes through the second hook hole 2122 to fix the second balance pole 205 on the bottom plate 21 .

On the other hand, the key cap 201 includes a plurality of first hooks 2011, a plurality of second hook connecting parts 2012 and a plurality of key cap hooks 2013, and the plurality of first key cap hooks 2013 are disposed inside the key cap 201. Apparently, it can be connected with a corresponding scissor connection element 202 . A plurality of first hooks 2011 are disposed on the inner surface of the key cap 201 , and function to connect with the first link portion 2041 to fix the first balance bar 204 on the key cap 201 . A plurality of second connecting portions 2012 are also disposed on the inner surface of the key cap 201 , which can be connected with the buffer bar 23 to fix the buffer bar 23 on the key cap 201 .

8 shows that the width of the first hook 2011 is greater than that of the second hook 2012. The first hook 2011 includes a support portion 2014 and a hook portion 2015. The support portion 2014 is arranged on the inner surface of the keycap 201 and is located on the first hook The function of the first side of the hook 2011 is to support the first link portion 2041 of the first balance bar 204 . The hook portion 2015 is also disposed on the inner surface of the keycap 201 and located on the second side of the first hook 2011 , and can be engaged with the first end of the buffer strip 23 . Through the structure of the support portion 2014 and the hook portion 2015 , the first link portion 2041 can be fixed in the first hook 2011 .

As for the buffer strip 23, the first end of the buffer strip 23 is fixed in the first hook 2011 and abuts against the first link portion 2041 of the first balance bar 204, while the second end of the buffer strip 23 is fixed on the first hook 2011. The second card was hooked up in 2012. The function of the buffer bar 23 is to fill the gap between the first balance bar 204 and the first hook 2011 and prevent the first link portion 2041 from colliding with the first hook 2011 to reduce the chance of noise. The buffer strip 23 includes a top portion 231, an extension hook portion 232, and an engaging column 233. The top portion 231 is disposed on the first end of the buffer strip 23 and is located on the first side wall 234 of the buffer strip 23, and can be positioned against the first side wall 234 of the buffer strip 23. The first link part 2041 of the balance bar 204 . The extension hook portion 232 is disposed on the first end of the buffer bar 23 and on the second side wall 235 of the buffer bar, and can engage with the hook portion 2015 . The engaging column 233 is disposed on the second end of the buffer bar 23 and can be combined with the second hook 2012 of the key cap 201 . That is to say, through the structure of the extended hook portion 232 and the engaging cylinder 233 , the two ends of the buffer bar 23 can be respectively fixed on the inner surface of the key cap 201 . In this preferred embodiment, the abutment top 231 , the extension hook portion 232 and the engaging column 233 are integrally formed with the buffer bar 23 , and the buffer bar 23 is made of plastic material.

Next, the operation of pressing the button 20' will be described. Please refer to FIG. 6 , FIG. 7 and FIG. 8 at the same time. FIG. 8 is a schematic cross-sectional view of the structure of the keyboard in the first preferred embodiment of the present invention. When the user touches the key cap 201 of any key 20', the key cap 201 moves downward relative to the bottom plate 21, so that the scissors-type connecting element 202 is pushed against and swings, and the downwardly moving key cap 201 pushes against the elastic The element 203 is such that the elastic element 203 is pressed against to deform and trigger the corresponding key switch 221 to generate a corresponding key signal. And when the user no longer touches the button 20', the button cap 201 will move upward relative to the bottom plate 21 in response to the elastic force generated by the elastic element 203 recovering from the deformed state, so as to push the button cap 201 to move upward, and at the same time The scissors-type connecting element 202 is driven to swing to return from the folded state to the open-closed state, and the button cap 201 will return to the position before being pressed.

Since the engaging cylinder 233 is fixed in the second hook 2012 and can rotate relative to the second hook 2012 in response to the movement of the button cap 201, the buffer bar 23 can swing correspondingly, so the button 20' is locked. During the pressing process, the abutting portion 231 can continue to abut against the first link portion 2041 without affecting the movement of the key cap 201 . In other words, the buffer strip 23 can provide uninterrupted noise reduction function. On the other hand, since the buffer bar 23 is also used as a connecting bridge between the first balance bar 204 and the keycap 201, when the user touches the edge of the keycap 201, the touch applied to the keycap 201 by the user will The pressure can be transmitted to the first balance bar 204 through the buffer bar 23 , so the keyboard 2 of the present invention can solve the problem of unsmooth linkage between the first balance bar 204 and the keycap 201 in the prior art.

It should be noted that in this preferred embodiment, only the buffer bar 23 is provided between the first balance bar 204 and the key cap 201 to reduce the chance of the first balance bar 204 colliding with the key cap 201 . Of course, another buffer strip can also be disposed between the second balance bar 205 and the keycap 201 to further reduce the generation of noise.

In addition, the keyboard of the present invention also provides a second preferred embodiment which is different from the above-mentioned practice. Please refer to FIG. 9 and FIG. 10 at the same time. FIG. 9 is an exploded schematic view of the structure of the keyboard of the present invention in the second preferred embodiment, and FIG. 10 is another view of the keycap of the keyboard of the present invention in the second preferred embodiment. Schematic. The keyboard 3 of the present invention includes a plurality of keys 30', a bottom plate 31, a switch circuit board 32 and a buffer strip 33, and each key 30' includes a key cap 301, at least one scissor-type connecting element 302, an elastic element 303, and a first balance bar 304 and a second balance pole 305 . The first balance bar 304 includes a first link part 3041 and two first hook parts 3042 , and the second balance bar 305 includes a second link part 3051 and two second hook parts 3052 . The structure of the keyboard 3 of this preferred embodiment is substantially the same as that of the keyboard 2 of the above-mentioned first preferred embodiment, and the similarities will not be repeated here. There are three differences between the two. First, the setting relationship of the buffer bar 33 is different. Second, the structure of the bottom plate 31 is different. Third, the structure of the keycap 301 is different.

It can be seen from FIGS. 9 to 10 that the key cap 301 only includes a plurality of first hooks 3011 and a plurality of key cap hooks 3012, and the first hooks 3011 include a support portion 3014 and a hook portion 3015, and no There are a plurality of second hooks 2012 in the above-mentioned first preferred embodiment. On the other hand, in addition to a plurality of bottom plate hooks 311 and a plurality of connecting frames 312, the bottom plate 31 also includes a plurality of second hooks 313, which are arranged on the bottom plate 31 and can be connected to the second ends of the buffer strips 33. combined.

As for the buffer strip 33 , the first end of the buffer strip 33 is fixed in the first hook 3011 and abuts against the first link portion 3041 , while the second end of the buffer strip 33 is fixed on the second hook of the bottom plate 31 313 on. The buffer strip 33 includes a top 331 , an extension hook 332 and an engaging cylinder 333 . The top 331 is disposed on the first end of the buffer strip 33 and is located on the first side wall 334 of the buffer strip 33 . Link part 3041. The extension hook portion 332 is disposed on the first end of the buffer bar 33 and on the second side wall 335 of the buffer bar, and can engage with the hook portion 3015 . The engaging column 333 is disposed on the second end of the buffer bar 33 and can be combined with the second hook 313 of the bottom plate 31 .

Please refer to Figure 11 and Figure 12 at the same time, Figure 11 is a schematic cross-sectional view of the structure of the keyboard of the present invention being pressed in the second preferred embodiment, and Figure 12 is a schematic cross-sectional view of the structure of the keyboard of the present invention in the second preferred embodiment . Fig. 11 shows the situation that the button 30' is pressed, and at the same time shows that the first end of the buffer strip 33 is fixed on the keycap 201 by extending the hook 332, and the second end of the buffer strip 33 is fixed by the engaging cylinder 333 and is fixed on the base plate 31 of the joint situation. According to FIG. 11, it can be seen that the buffer bar 33 is assembled on the button 30' when the button 30' is in the pressed state. After the buffer bar 33 is assembled, and the button 30' recovers from the pressed state, the buffer bar 33 is nearly corresponding Swing, and at the same time deform due to its plastic elasticity, as shown in Figure 12. As for the operation of the button 30' being pressed, it is the same as the above-mentioned first preferred embodiment, and will not be described again.

According to the above, it can be seen that the keyboard of the present invention is provided with a buffer strip between the keycap and the balance bar, and the buffer strip is fixed between the keycap and the bottom plate, thereby filling the gap between the keycap and the balance bar, while using the buffer strip to resist Top the balance bar, so that the balance bar can be close to the key cap, and reduce the chance of the balance bar hitting the key cap. On the other hand, the buffer bar can also be used as a connecting bridge between the balance bar and the keycap, which can transmit the touch force received by the keycap to the balance bar, so that the balance bar can smoothly move with the keycap to enhance Its tactile feel.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the claims of the present invention. Therefore, all other equivalent changes or modifications that do not deviate from the disclosed spirit of the present invention should be included in the scope of this case. within the claims.

Claims (10)

1. A keyboard, comprising: One button, including: a key cap, exposed outside the keyboard, having a first hook; and a balance bar, arranged under the key cap and fixed in the first hook; A switch circuit board, located below the key, is used to be triggered by the key to output a key signal; a bottom plate, arranged under the switch circuit board and connected to the balance bar, for carrying the button; and A buffer bar, a first end of the buffer bar is fixed in the first hook and abuts against the balance bar, so as to fill the gap between the balance bar and the first hook. 2. The keyboard as claimed in claim 1, wherein the first hook comprises: a support part, disposed on an inner surface of the keycap and located on a first side of the first hook, for supporting the balance bar; and A hook portion is disposed on the inner surface of the key cap and located on a second side of the first hook, and is used for engaging with the first end of the buffer strip. 3. The keyboard of claim 2, wherein the buffer bar comprises: an abutting top, disposed on the first end of the buffer bar and on a first side wall of the buffer bar, for abutting against the balance bar; an extended hook portion, disposed on the first end of the buffer strip and on a second side wall of the buffer strip, for engaging with the hook portion; and An engaging cylinder is arranged at a second end of the buffer bar and is fixed on the key cap or the bottom plate. 4 . The keyboard as claimed in claim 3 , wherein the extending hook portion, the abutting portion, and the engaging column are integrally formed with the buffer bar. 5. The keyboard as claimed in claim 3, wherein the keycap further comprises a second hook disposed on an inner surface of the keycap for combining with the engaging column to fix the buffer bar The second end is on the key cap. 6. The keyboard as claimed in claim 3, wherein the base plate comprises a second hook disposed on the base plate for combining with the engaging column to fix the second end of the buffer strip. superior. 7. The keyboard as claimed in claim 3, wherein the bottom plate comprises a connecting frame arranged on the bottom plate for connecting with the balance bar, the connecting frame comprises a hook hole for the balance bar to pass through to fix the balance bar The balance bar is on the base plate. 8. The keyboard of claim 7, wherein the balance bar comprises: a link part, fixed in the first hook and connected to the key cap; and A hook portion is located at one end of the connecting rod portion and corresponds to the hook hole; wherein, the hook portion passes through the hook hole so that the balance bar is fixed on the base plate. 9. The keyboard as claimed in claim 8, wherein the connecting rod portion and the hook portion are integrally formed with the balance bar, and are made of metal material or plastic material. 10. The keyboard as claimed in claim 1, wherein the key further comprises: a scissors-type connecting element, connected to the key cap and the base plate, for fixing the key cap on the base plate and moving the key cap relative to the base plate; and An elastic element, located between the key cap and the switch circuit board and corresponding to the key switch, is used to be pushed against the switch circuit board by the key cap; wherein, when the elastic element is no longer held by the key cap When pushed, the elastic element provides an elastic force to the keycap.