CN108206111A - Keyboard with a keyboard body - Google Patents

Abstract

The present invention relates to a keyboard, comprising a key, a base plate, a switch circuit board, a soft cover and a buffer pad, wherein the key comprises a key cap and a balance bar connected to the key cap and the soft cover. The soft cover is arranged on the base plate and forms a receiving space with the base plate, so that the balance bar is connected to the base plate by extending into the receiving space. The buffer pad is arranged on the base plate and located in the receiving space, so that the balance bar made of metal material and the base plate can be separated by the soft cover and the buffer pad, so that the keyboard of the present 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 the present invention 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. These buttons 10, 10' are for the user to press with fingers to generate corresponding signals to the computer, so that the computer can execute the pressed button function. Generally speaking, pressing the buttons 10, 10' can input symbols such as English letters , 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 also provided with a special mechanism to improve its smoothness of operation. The button 10' also includes a first balance bar 104 and a second balance bar 105, and the first balance bar 104 includes a first link part 1041 and two first hook parts 1042, and the two first hook parts 1042 are respectively located on the second Two ends of a 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 structure 111 and a second connection structure 112 , and the first connection structure 111 and the second connection structure 112 respectively extend upward and pass through the membrane switch circuit 12 . The first connection structure 111 includes a first hook hole 1111 and a third hook hole 1112, and the second connection structure 112 includes a second hook hole 1121 and a fourth hook hole 1121 corresponding to the first hook hole 1111 and the third hook hole 1112 respectively. Hole 1122.

Wherein, the first link portion 1041 of the first balance bar 104 and the second link portion 1051 of the second balance bar 105 are respectively pivotally connected to the key cap 101 of the key 10 ′, and the two first links of the first balance bar 104 The hook portion 1042 respectively passes through the first hook hole 1111 of the first connection structure 111 and the second hook hole 1121 of the second connection structure 112 . On the other hand, the two second hook portions 1052 of the second balance pole 105 respectively pass through the third hook hole 1112 of the first connection structure 111 and the fourth hook hole 1122 of the second connection structure 112 .

Please refer to FIG. 4 and FIG. 5 . FIG. 4 is a structural schematic diagram of the assembly of the metal bottom plate and the membrane switch circuit of the conventional keyboard, and FIG. 5 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, the first balance bar 104, the second balance bar 105, and the metal bottom plate 11 are all made of metal material. It can be seen from FIG. 4 and FIG. When moving to make the first balance pole 104 and the second balance pole 105 move, the two first hooks 1042 of the first balance pole 104 and the two second hooks 1052 of the second balance pole 105 often collide and rub against each other. Metal base, hence the noise. Especially at the R corners of the two first hooks 1042 and the two second hooks 1052 (marked with oblique lines in FIG. 5 ), but such a sound is an unpleasant noise to the user.

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

Contents of the invention

The main purpose of the present invention is to provide a keyboard that can reduce noise.

In a preferred embodiment, the present invention provides a keyboard including a key, a switch circuit board, a bottom plate, a soft cover and a buffer pad. The key includes a key cap exposed outside the keyboard and a balance bar, and the balance bar is connected to the key cap, the balance bar includes a connecting rod part and a hook part, and the connecting rod part is connected to the key cap , and the hook portion is located at one end of the connecting rod portion. The switch circuit board is located between the key and the bottom plate, and is used to be triggered by the key to output a key signal. The bottom plate is arranged under the switch circuit board to carry the key. The flexible cover is arranged on the base plate and forms a receiving space with the base plate, so that the hook part extends into the receiving space, so as to limit the sliding of the hook part in the receiving space. And the buffer pad is arranged on the base plate and located in the accommodating space for separating the hook portion and the base plate.

In a preferred embodiment, the present invention also provides a keyboard including a key, a switch circuit board, a bottom board, a light emitting element for generating a light beam, a light guide plate and a soft cover. The key includes a key cap exposed outside the keyboard and a balance bar, and the balance bar is connected to the key cap, the balance bar includes a connecting rod part and a hook part, and the connecting rod part is connected to the key cap , and the hook portion is located at one end of the connecting rod portion. The bottom plate is arranged under the key and is used for connecting the key. The switch circuit board is located between the key and the bottom plate, 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 is used for bearing the button. The light guide plate is arranged under the base plate and on one side of the light-emitting element, and is used to guide the light beam so that the light beam is projected to the key. The soft cover is arranged on the light guide plate and forms a receiving space with the light guide plate, so that the hook part extends into the receiving space, so as to limit the sliding of the hook part in the receiving space.

In short, the advantages and beneficial effects of the keyboard provided by the present invention are: the keyboard of the present invention is provided with a soft cover on the upper surface of the bottom plate or the light guide plate to separate the first hook portion (and the second hook portion) from the bottom plate. Since the soft cover made of soft material replaces the traditional metal first connection structure and second connection structure, the first hook and the second hook made of metal material can only be connected with the soft cover. The cover is in contact with the metal material, so as to reduce the chance of collision with the metal material. Therefore, the keyboard of the present invention can reduce noise.

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 structural schematic diagram of the assembly of the metal bottom plate of the existing keyboard and the membrane switch circuit.

FIG. 5 is a schematic diagram of the operation of the first balance bar and the second balance bar of the conventional keyboard.

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

Fig. 7 is an exploded schematic diagram of the structure of the keyboard in the first preferred embodiment of the present invention.

Fig. 8 is an exploded view of the structure of the keyboard in another viewing angle of the first preferred embodiment of the present invention.

FIG. 9 is an exploded schematic view of the switch circuit board of the keyboard in the first preferred embodiment of the present invention.

FIG. 10 is a structural schematic diagram of the assembly of the bottom plate and the switch circuit board of the keyboard in the first preferred embodiment of the present invention.

FIG. 11 is a schematic diagram of the operation of the first balance bar and the second balance bar of the keyboard in the first preferred embodiment of the present invention.

Fig. 12 is an exploded schematic diagram of the structure of the keyboard in the second preferred embodiment of the present invention.

Fig. 13 is an exploded view of the structure of the keyboard in another viewing angle in the second preferred embodiment of the present invention.

FIG. 14 is a structural diagram of the assembly of the light guide plate, the bottom plate and the switch circuit board of the keyboard in the second preferred embodiment of the present invention.

Fig. 15 is an exploded schematic diagram of the structure of the keyboard in the third preferred embodiment of the present invention.

Explanation of reference signs:

1, 2, 3, 4 keypads

10, 10’, 20, 20’, 30, 30’, 40’’ buttons

11 metal bottom plate

12 Membrane switch circuit

21, 31, 41 base plate

22, 32, 42 switch circuit board

23, 36, 43 Soft cover

24 cushion

25, 37 storage space

33 light emitting element

34 light guide plate

35 power supply circuit board

101, 201, 301, 401 Keycaps

102, 202, 302, 402 Scissor connection elements

103 elastic rubber body

104, 204, 304, 404 first balance bar

105, 205, 305, 405 second balance bar

111 The first connection structure

112 Second connection structure

121, 224, 424 key switch

211, 411 Bottom plate hook

203, 303, 403 Elastic elements

221, 421 upper circuit board

222, 422 lower circuit board

223, 423 isolation layer

225, 425 openings

311 Second opening

325 first opening

1021 First frame

1022 Second frame

1031 Reaching the top

1041, 2041, 3041, 4041 first link part

1042, 2042, 3042, 4042 first hook

1051, 2051, 3051, 4051 Second link part

1052, 2052, 3052, 4052 second hook

1111 First hook hole

1112 The third hook hole

1111 Second hook hole

1122 The fourth hook hole

2011 First Link

2012 Second Link

2211 Upper conductive line

2221 lower conductive line

2231 isolation layer opening

D11, D21 First direction

D12, D22 Second direction

D13, D23 first direction of rotation

D14, D24 Second rotation direction

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. 6 , 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. These keys 20, 20' can be pressed by the user's fingers to generate corresponding signals to the computer connected to the keyboard 2 ( not shown in the figure) to make the computer perform 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. 7, Fig. 8 and Fig. 9 at the same time, Fig. 7 is an exploded schematic view of the structure of the keyboard in the first preferred embodiment of the present invention, and Fig. 8 is a structure of the keyboard of the present invention in another perspective in the first preferred embodiment An exploded view, and FIG. 9 is an exploded view of the structure of the switch circuit board of the keyboard in the first preferred embodiment of the present invention. The keyboard 2 of the present invention includes a base plate 21, a switch circuit board 22, a soft cover 23 and a buffer pad 24 in addition to a plurality of keys 20, 20'. The base plate 21 is arranged under the plurality of keys 20, 20', which can A plurality of keys 20, 20' are connected. The switch circuit board 22 is located between a plurality of keys 20, 20' and the base 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 an upper circuit board 221 and a lower circuit board 222 , an isolation layer 223 , a key switch 224 and a plurality of openings 225 . In addition, each button 20' includes a button 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 224 . 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 The portion 2041 can be connected to the keycap 201 , and the two first hook portions 2042 are respectively located at one end and the other end of the first link portion 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 keycap 201, and the two second hook parts 2052 are respectively located at one end and the other end of the second link portion 2052 . The bottom plate 21 has a plurality of bottom plate hooks 211 , which function to connect with the scissor-type connection elements 202 and fix the scissor-type connection elements 202 on the bottom plate 21 . On the other hand, the keycap 201 includes a plurality of first connecting parts 2011 and a plurality of second connecting parts 2012, and the plurality of first connecting parts 2011 are arranged on the inner surface of the keycap 201, which can be connected with the scissor-type connecting element 202 . A plurality of second connecting parts 2012 are also disposed on the inner surface of the key cap 201 , and function to connect with the first link part 2041 and the second link part 2051 .

In the switch circuit board 22 , the upper circuit board 221 has an upper conductive circuit 2211 , and the upper conductive circuit 2211 is disposed on the lower surface of the upper circuit board 221 . The lower circuit board 222 is located below the upper circuit board 221 , the lower circuit board 222 includes a lower conductive circuit 2221 and an extension area 2222 , and the lower conductive circuit 2221 is disposed on the upper surface of the lower circuit board 222 . The isolation layer 223 is located between the upper circuit board 221 and the lower circuit board 222 , and the isolation layer 223 has an isolation layer opening 2231 corresponding to the key cap 201 . The function of the isolation layer 223 is to separate the upper conductive circuit 2211 and the lower conductive circuit 2221 . Wherein, the upper conductive circuit 2211, the isolation layer opening 2231 and the lower conductive circuit 2221 jointly form a key switch 224, and each key switch 224 corresponds to a key 20, 20', which can be triggered by the key 20, 20' to output the key Signal.

Please refer to FIG. 7 and FIG. 10 at the same time. FIG. 10 is a structural schematic diagram of the assembly of the bottom plate and the switch circuit board of the keyboard in the first preferred embodiment of the present invention. The flexible cover 23 is arranged on the base plate 21 and forms a plurality of accommodation spaces 25 between the base plate 21, so that the first hook portion 2042 and the second hook portion 2052 respectively extend into the plurality of accommodation spaces 25, so as to limit the first hook. The part 2042 and the second hook part 2052 slide in the plurality of accommodating spaces 25 respectively. Wherein, the soft cover 23 is disposed on the upper surface of the bottom plate 21 in an adhesive manner. In addition, the buffer pad 24 is disposed on the upper surface of the base plate 21 and is located in the accommodation space 25, and its function is to separate the first hook portion 2042 from the base plate 21, and separate the second hook portion 2052 from the base plate 21, so as to avoid the first hook portion 2042 and the second hook 2052 are in contact with the bottom plate 21 to generate a sound. In this preferred embodiment, the plurality of accommodating spaces 25 are perforated, so that the first hook 2042 and the second hook 2052 pass through the corresponding perforations, and the soft cover is made of silicone material (commonly known as silicon). ) or soft plastic material, and the buffer pad 24 is made of soft material or plastic material.

Next, the operation of pressing the button 20' will be described. 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 224 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.

Please refer to FIG. 11 , which is a schematic diagram of the operation of the first balance bar and the second balance bar of the keyboard in the first preferred embodiment of the present invention. When the key cap 201 of the key 20' moves up or down relative to the bottom plate 21, the first balance bar 204 moves repeatedly to the first direction D21 or the second direction D22, and to the first rotation direction D23 or the second direction D22. The direction of rotation D24 is reversed. Wherein, the first link part 2041 is turned over relative to the plurality of second connecting parts 2012 , and the two first hook parts 2042 are turned over in the corresponding accommodating spaces 25 without contacting the bottom plate 21 . Similarly, the second balance pole 205 will also repeatedly move toward the first direction D21 or the second direction D22, and turn over toward the first rotation direction D23 or the second rotation direction D24. Wherein, the second link part 2051 is turned over relative to the plurality of second connecting parts 2012 , and the two second hook parts 2052 are turned over in the corresponding accommodating spaces 226 respectively without contacting the bottom plate 21 .

According to the above, the keyboard 2 of the present invention can separate the first hook portion 2042 and the second hook portion 2052 from the bottom plate 21 through the arrangement of the soft cover 23 and the buffer pad 24 . Even if the first balance bar 204, the second balance bar 205 and the base plate 21 are all made of metal materials, the first hook portion 2042 and the second hook portion 2052 will not collide with the base plate 21 and will not produce sound. , the keyboard 2 of the present invention has the effect of reducing noise.

Furthermore, the present invention also provides a second preferred embodiment which is different from the above. Please refer to FIG. 12 and FIG. 13 at the same time. FIG. 12 is a schematic exploded view of the keyboard in the second preferred embodiment of the present invention, and FIG. 13 is a schematic exploded view of the keyboard in another perspective in the second preferred embodiment of the present invention. . The keyboard 3 of the present invention includes a plurality of keys 30', a bottom plate 31, a switch circuit board 32, a light emitting element 33, a light guide plate 34, a power supply circuit board 35 and a soft cover 36, and each key 30' includes a key cap 301, at least one The scissors-type connection element 302, the elastic element 303, the first balance bar 304 and the second balance bar 305, wherein the first balance bar 304 includes a first link part 3041 and two first hook parts 3042, and the second balance bar 305 includes The second link part 3051 and the two second hook parts 3052 . In addition to the upper circuit board, the lower circuit board, the isolation layer and the key switch, the switch circuit board 32 also includes a plurality of first openings 325 , while the bottom board 31 has a plurality of second openings 311 . 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 keyboard 3 of this preferred embodiment further includes a light emitting element 33 , a light guide plate 34 and a power supply circuit board 35 . Second, the structure of the soft cover 325 in this preferred embodiment. Thirdly, the structure of the base plate 31 and the switch circuit board 32 .

Please refer to FIG. 12 , FIG. 13 and FIG. 14 at the same time. FIG. 14 is a structural diagram of the assembly of the light guide plate, the bottom plate and the switch circuit board of the keyboard in the second preferred embodiment of the present invention. The light guide plate 34 is disposed under the base plate 31 , and the light emitting element 33 is located on one side of the light guide plate 34 , and its function is to generate the light beam B. As shown in FIG. The power supply circuit board 35 is disposed under the bottom plate 31 and also on one side of the light guide plate 34 , which can carry the light emitting element 33 on it and supply power to the light emitting element 33 to make the light emitting element 33 operate.

It can be seen from FIGS. 12 to 14 that the flexible cover 36 is disposed on the light guide plate 34 and forms a plurality of accommodation spaces 37 with the light guide plate 34, so that the first hook 3042 and the second hook 3052 can extend respectively. into a plurality of accommodation spaces 37. Wherein, the flexible cover 36 is adhesively disposed on the upper surface of the light guide plate 34 , and one end of the plurality of accommodating spaces 37 is closed, and the closed structure helps to reduce noise.

On the other hand, according to the structure of the flexible cover 36 , the switch circuit board 32 further includes a first opening 325 corresponding to the flexible cover 36 . Similarly, the bottom plate 31 is also provided with a second opening 311 corresponding to the soft cover 36 . Therefore, the soft cover 36 can sequentially pass through the second opening 311 and the first opening 325 and be located between the bottom plate 31 and the keycap 301, so that the first hook 3042 and the second hook 3052 can respectively extend in. Inside the accommodation space 37, as shown in FIG. 14 .

In a preferred method, a buffer pad can also be provided between the upper surface of the light guide plate and the receiving space, so as to prevent the first hook portion and the second hook portion from contacting the light guide plate respectively, so as to ensure that there will be no collision sound.

In addition, the present invention also provides a third preferred embodiment which is different from the above. Please refer to FIG. 15 , which is an exploded schematic view of the keyboard in the third preferred embodiment of the present invention. The keyboard 4 of the present invention includes a plurality of keys 40', a bottom plate 41, a switch circuit board 42, and a soft cover 43, and each key 40' includes a key cap 401, at least one scissor-type connecting element 402, an elastic element 403, a first balance The rod 404 and the second balance rod 405, wherein the first balance rod 404 includes a first link part 4041 and two first hook parts 4042, and the second balance bar 405 includes a second link part 4051 and two second hook parts 4052 . The switch circuit board 42 includes an upper circuit board 421 , a lower circuit board 422 , an isolation layer 423 , a key switch 424 and an opening 425 , and the bottom board 41 has a plurality of bottom board hooks 411 . The structure of the keyboard 4 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. The difference between the two is that the flexible cover 43 is disposed on the isolation layer 423 of the switch circuit board 42 .

Specifically, the switch circuit board 42 of this preferred embodiment is designed as a structure in which the isolation layer 423 can be partially exposed outside its upper surface, so that the soft cover 43 can be arranged on the upper surface of the isolation layer 423 in an adhesive manner. . In addition, the opening 425 of the switch circuit board 42 runs through the upper circuit board 421 , the lower circuit board 422 and the isolation layer 423 , so that a plurality of bottom plate hooks 411 can pass through the corresponding openings 425 to connect with the scissor-type connecting element 402 . That is to say, the switch circuit board 42 and the soft cover 43 made of non-metallic materials can be used to separate the first hook (and the second hook) from the bottom plate, so as to avoid the first hook and the second hook from The bottom plate collides. It is for illustrative purposes only, and is not intended to be limiting. In another preferred embodiment, the flexible cover can also be arranged on the upper surface of the upper circuit board of the switch circuit board in an adhesive manner, and this arrangement method can also achieve the effect of reducing noise.

According to the above, the keyboard of the present invention is provided with a soft cover on the upper surface of the base plate or the light guide plate to separate the first hook portion (and the second hook portion) from the base plate. Since the soft cover made of soft material replaces the traditional metal first connection structure and second connection structure, the first hook and the second hook made of metal material can only be connected with the soft cover. The cover is in contact with the metal material, so as to reduce the chance of collision with the metal material. Therefore, the keyboard of the present invention can reduce noise.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope 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 present invention. within the scope of protection.

Claims (12)

1. A keyboard, said keyboard comprising: One button, including: a keycap exposed from the keyboard; and A balance bar is connected to the button cap, and the balance bar includes: a link part connected to the key cap; and a hook portion located at one end of the connecting rod portion; 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, for carrying the button; A flexible cover is arranged on the base plate and forms a receiving space with the base plate, so that the hook part extends into the receiving space, so as to limit the sliding of the hook part in the receiving space; and A buffer pad is arranged on the base plate and located in the accommodation space, and is used for separating the hook portion and the base plate. 2. The keyboard of claim 1, wherein the switch circuit board comprises: An upper circuit board, including an upper conductive circuit, and the upper conductive circuit is arranged on the lower surface of the upper circuit board; The lower circuit board, located below the upper circuit board, includes a lower conductive circuit, and the lower conductive circuit is arranged on an upper surface of the lower circuit board; and An isolation layer is located between the upper circuit board and the lower circuit board, and includes an isolation layer opening for separating the upper conductive circuit and the lower conductive circuit; wherein the upper conductive circuit, the isolation layer opening and The lower conductive lines jointly form a key switch. 3. The keyboard as claimed in claim 1, wherein the switch circuit board has an opening corresponding to the soft cover, and the soft cover passes through the opening so that the hook can extend into the receiving space Inside. 4 . The keyboard as claimed in claim 1 , wherein the flexible cover is disposed on an upper surface of the bottom plate in an adhesive manner, and one end of the receiving space is closed so that the hook portion extends into the receiving space. 5 . The keyboard as claimed in claim 1 , wherein the flexible cover is disposed on an upper surface of the bottom plate in an adhesive manner, and the accommodating space is a perforation, and the hook portion passes through the perforation. 6. The keyboard as claimed in claim 1, wherein the soft cover is made of silicone resin material or soft plastic material. 7. A keyboard, said keyboard comprising: One button, including: a keycap exposed from the keyboard; and A balance bar is connected to the button cap, and the balance bar includes: a link part connected to the key cap; and a hook portion located at one end of the connecting rod portion; A switch circuit board, located under the key, is used to be triggered by the key to output a key signal; a bottom plate, arranged under the switch circuit board, for carrying the button; a light emitting element for generating a light beam; a light guide plate, arranged under the bottom plate and on one side of the light-emitting element, is used to guide the light beam so that the light beam is projected onto the key; and A flexible cover is arranged on the light guide plate and forms an accommodating space with the light guide plate, so that the hook part extends into the accommodating space, so as to limit the sliding of the hook part in the accommodating space. 8. The keyboard as claimed in claim 7, wherein the switch circuit board has a first opening corresponding to the soft cover for the soft cover to pass through the first opening; and the bottom plate has a second opening, corresponding to the flexible cover, for the flexible cover to pass through the second opening; wherein, the flexible cover passes through the second opening and the first opening, The hook portion can be extended into the accommodation space. 9. The keyboard as claimed in claim 7, wherein the flexible cover is disposed on an upper surface of the light guide plate in an adhesive manner, and one end of the receiving space is closed so that the hook portion extends into the receiving space. 10 . The keyboard as claimed in claim 7 , wherein the soft cover is disposed on an upper surface of the light guide plate in an adhesive manner, and the receiving space is a perforation through which the hook portion passes. 11 . 11. The keyboard of claim 7, 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 not pushed by the key cap When it arrives, the elastic element provides an elastic force to the keycap. 12 . The keyboard as claimed in claim 7 , wherein the keyboard further comprises a buffer pad disposed on the light guide plate and located in the accommodating space for separating the hook portion and the light guide plate. 13 .