Keyboard

Abstract

The utility model discloses a keyboard which comprises a shell, a fixing layer, a plurality of key structures and a cut-off piece. The fixed layer is connected to the shell; the key structure is installed on the fixing layer and comprises a shaft body and a reset piece, the shaft body can slide relative to the fixing layer, and the reset piece is used for resetting the shaft body; according to the scheme, when the key structure is pressed down, the shaft body moves downwards until the shaft body abuts against the cut-off piece, the influence of vibration on the fixing layer is small, when the keyboard is knocked at high frequency, the fixing layer can be kept stable, the service life of the fixing layer is effectively prolonged, and the service life of the keyboard is prolonged. According to the technical scheme, the mistaken touch risk caused by the fact that the key structure installed on the fixing layer is affected by vibration is avoided, the multiple supporting columns are arranged on the inner bottom face of the shell, the bottom face of the cut-off plate is supported through the supporting columns, when the shaft body moves downwards to abut against the cut-off piece, the shell supports the cut-off plate through the supporting columns, and the stability of the cut-off plate can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of external devices, in particular to a keyboard. Background Art

[0002] Keyboards are devices used to input commands and data for operating devices and are now widely used in various scenarios, including work and entertainment. Some keyboards currently on the market have a fixed layer, with a circuit board positioned between the fixed layer and the keyboard base. The key structure is mounted on the fixed layer. When the key structure moves downward, the circuit board generates a sensing signal through optical, magnetic, or contact sensing, enabling data input.

[0003] However, the key structure in the existing keyboard uses a fixed layer to limit the downward position of the key shaft. During the downward process of the key shaft, it collides with the fixed layer, causing the fixed layer to vibrate, which will affect other key structures installed on the fixed layer. Long-term use can easily lead to a decrease in the stability of the fixed layer, resulting in the problem of multiple key accidental touches, and shortening the service life of the keyboard. Utility Model Content

[0004] The main purpose of the utility model is to provide a keyboard, aiming to reduce the vibration of the fixed layer when typing on the keyboard.

[0005] To achieve the above object, the present invention provides a keyboard comprising:

[0006] A shell, wherein the inner bottom surface of the shell is provided with a plurality of support columns;

[0007] a fixed layer connected to the shell;

[0008] a plurality of key structures, each of which is mounted on the fixed layer, and each of which comprises a shaft and a reset member, wherein the shaft can slide relative to the fixed layer, and the reset member is used to reset the shaft; and

[0009] A cutoff plate is connected to the outer shell and is used to limit the downward movement of the shaft. The cutoff plate is located between the fixed layer and the inner bottom surface of the outer shell, and the support column is supported on the bottom surface of the cutoff plate.

[0010] In some embodiments of the present invention, the housing includes a front shell and a bottom shell connected to each other, and the support column is formed on a side of the bottom shell facing the front shell.

[0011] In some embodiments of the present invention, the cutoff plate includes a plate body and a plurality of elastic limiting portions, wherein the plurality of elastic limiting portions are connected to the plate body, and one of the elastic limiting portions is located below one of the shaft bodies;

[0012] The supporting columns support the plate body.

[0013] In some embodiments of the present invention, the keyboard also includes a first buffer pad, which is arranged between the bottom shell and the cut-off plate. The first buffer pad is provided with multiple first openings, one of the first openings is aligned with the elastic limiting portion, and the support column presses against the first buffer pad to support the plate body.

[0014] In some embodiments of the present invention, the keyboard also includes a first sound-absorbing layer, which is arranged between the bottom shell and the first buffer pad. The first sound-absorbing layer is provided with a first avoidance hole, and the support column passes through the first avoidance hole and presses against the first buffer pad.

[0015] In some embodiments of the present invention, a limiting column is provided on a side of the surface shell facing the bottom shell to limit the stop plate.

[0016] In some embodiments of the present invention, the keyboard also includes a circuit board, which is located between the fixed layer and the cutoff plate. The circuit board is provided with a plurality of key through holes, one of the key through holes is aligned with the shaft body, and the circuit board is provided with an assembly through hole, and the limiting column passes through the assembly through hole.

[0017] In some embodiments of the present invention, the keyboard also includes a second buffer pad, which is arranged between the circuit board and the cutoff plate. The second buffer pad is provided with multiple second openings, and one of the second openings is aligned with one of the key position through holes for the shaft to pass through, and the limiting column presses against the second buffer pad to limit the cutoff plate.

[0018] In some embodiments of the present invention, the keyboard also includes a second sound-absorbing layer, which is arranged between the surface shell and the second buffer pad. The second sound-absorbing layer is provided with a second avoidance hole, and the limiting column passes through the second avoidance hole and presses against the second buffer pad.

[0019] In some embodiments of the present invention, the distance between the limiting post and the cutoff plate is not less than 1 mm and not more than 2 mm.

[0020] The utility model adopts the above scheme, when the key structure is pressed, the shaft moves down until it hits the cut-off piece, and the shell supports the cut-off plate through the support column, so as to ensure the stability of the cut-off plate. The collision between the key shaft and the cut-off piece generates vibration, and the vibration source is separated from the fixed layer, so the fixed layer is less affected by the vibration. When the keyboard is struck at a high frequency, the fixed layer can remain stable, effectively extending the service life of the fixed layer and avoiding the risk of accidental touch due to the key structure installed on the fixed layer being affected by the vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0022] Figure 1 This is a structural diagram of an embodiment of a keyboard provided by the present invention;

[0023] Figure 2 An exploded view of an embodiment of a keyboard provided by the present invention;

[0024] Figure 3 A schematic diagram of the keyboard structure provided by the present invention;

[0025] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 A cross-sectional view of an embodiment of a keyboard provided by the present invention;

[0027] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0028] Description of Figure Numbers:

[0029] 100, keyboard; 10, housing; 101, mounting port; 11, fixing layer; 12, top shell; 121, clearance hole; 122, limiting column; 20, bottom shell; 21, support column; 30, circuit board; 311, key position through hole; 32, sensing part; 33, assembly through hole; 40, key structure; 41, mounting seat; 411, sliding hole; 42, reset member; 43, key shaft; 44, trigger member; 45, keycap; 50, cutoff plate; 51, board body; 511. Main body; 512. Support arm; 513. Limiting hole; 514. Partition opening; 52. Elastic limiting portion; 52', elastic cantilever; 521. Arc arm; 522. Limiting joint; 61. First gasket; 62. Second gasket; 71. First sound-absorbing layer; 711. First avoidance hole; 72. Second sound-absorbing layer; 721. Second avoidance hole; 81. First buffer pad; 811. First opening; 82. Second buffer pad; 821. Second opening.

[0030] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0032] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] See also Figures 1 to 6 The present invention proposes a keyboard 100, comprising a shell 10, a fixing layer 11, a plurality of key structures 40 and a cut-off member 50; the fixing layer 11 is connected to the shell 10; the plurality of key structures 40 are installed at intervals on the fixing layer 11 and are partially exposed from the shell, each of the key structures 40 comprises a shaft and a reset member 42, the shaft can be movably arranged toward the bottom surface of the shell relative to the fixing layer 11, and the reset member 42 is used to reset the shaft; the cut-off member 50 is arranged in the shell 10, and the cut-off member 50 is used to limit the downward movement of the shaft.

[0035] Through the above-mentioned scheme, the present invention uses a key structure 40 to move downward until it hits the cut-off piece 50 when the key structure 40 is pressed. The key shaft 43 collides with the cut-off piece 50 to generate vibration. The vibration source is separated from the fixed layer 11, and the fixed layer 11 is less affected by the vibration. When the keyboard 100 is struck at a high frequency, the fixed layer 11 can remain stable, effectively extending the life of the fixed layer 11 and avoiding the risk of accidental touch due to the key structure 40 installed on the fixed layer 11 being affected by the vibration.

[0036] The above-mentioned shell 10 is generally made of plastic material, such as PC plastic, ABS plastic, PVC plastic, etc. The above-mentioned fixing layer 11 can be snap-connected with the shell 10 or can be integrally formed. It is implemented according to specific circumstances and is not limited here.

[0037] The above-mentioned key structure 40 generally also includes a keycap 45 and a mounting seat 41. The keycap 45 is installed on the top of the key shaft 43; the mounting seat 41 is generally provided with a sliding hole 411 and an upward limit structure. The key shaft 43 is slidably installed in the sliding hole, and the upward limit structure is engaged with the snap fit of the key shaft 43 to prevent the key shaft 43 from falling out of the sliding hole 411.

[0038] The structures of the above-mentioned cut-off member 50 are various. In some embodiments of the present invention, the cut-off member 50 is a limiting column connected to the shell. There are multiple limiting columns, and each limiting column is respectively positioned opposite to the key shaft 43 to limit the key shaft 43 from moving downward.

[0039] Preferably, in some embodiments of the present invention, the cut-off member 50 is a cut-off plate 50, and the edge of the cut-off plate 50 is detachably connected to the housing 10. In this way, when the cut-off plate 50 is damaged, only the cut-off plate 50 can be removed and replaced, which reduces the cost of replacement and is more convenient to assemble.

[0040] The above-mentioned cutoff plate 50 can be arranged above the fixed layer 11 or below the fixed layer 11. In some embodiments of the present invention, the cutoff plate 50 is arranged above the fixed layer 11, and the cutoff plate 50 is provided with an avoidance hole 711. The side wall of the key shaft 43 is provided with a limiting protrusion. When the key shaft 43 descends in the avoidance hole 711, the limiting protrusion presses against the upper surface of the cutoff plate 50, thereby limiting the movement of the key shaft 43.

[0041] To further enhance the shock absorption effect, in some embodiments of the present invention, the cutoff plate 50 includes a plate body 51 and multiple elastic stoppers 52. The edge of the plate body 51 is fixed to the housing 10, and the multiple elastic stoppers 52 are connected to the plate body 51, with each elastic stopper 52 positioned below a shaft. This arrangement creates a flexible impact when the key shaft 43 contacts the elastic stopper 52, resulting in enhanced shock absorption. Furthermore, because the vibration source is located below the fixed layer 11, the tapping sound generated by the vibration source is significantly weakened as it propagates to the keyboard 100, achieving a noise reduction effect.

[0042] There are many specific implementations of the elastic limiting portion 52. In some embodiments of the present invention, the elastic limiting portion 52 is a silicone pad connected to the top surface of the plate 51. Figure 2 In other embodiments of the present invention, the plate body 51 is provided with a plurality of limiting holes 513, and the elastic limiting portion 52 is an elastic cantilever 52' ​​connected to the hole wall of the limiting hole 513. In this way, the elastic limiting portion 52 and the plate body 51 can be an integral structure, directly manufactured by hot pressing, injection molding, or 3D printing, which helps reduce the number of parts and structural complexity. Furthermore, the elastic limiting portion 52 does not increase the overall thickness of the cutoff member 50, which helps improve the compactness of the structure.

[0043] Furthermore, in some embodiments of the present invention, the elastic cantilever 52' ​​includes two arc-shaped arms 521 and a limit joint 522. One end of the two arc-shaped arms 521 is connected to opposite sides of the limit joint 522, and the other end is connected to the hole wall of the limit hole 513. This arrangement improves the shock absorption effect of the elastic cantilever 52'.

[0044] In some embodiments of the present invention, the plate 51 includes a main body 511 and a support arm 512. The support arm 512 is connected to the edge of the main body 511 and has a partition 514 formed therebetween. The support arm 512 is connected to the housing 10. In this way, as vibration propagates from the center of the plate 51 to the edge, the vibration wave passing through the partition 514 is isolated, and only a small portion of the vibration propagates to the support arm 512, thereby improving the shock absorption effect.

[0045] In some embodiments of the present invention, the housing 10 includes a top shell 12 and a bottom shell 20. The bottom shell 20 is connected to the underside of the top shell 12. The fixed layer 11 is provided with a plurality of mounting openings 101. The top shell 12 is disposed outside the fixed layer and has clearance holes 121 formed in the top shell to expose the mounting openings 101. The cutoff plate 50 is located between the fixed layer 11 and the bottom shell 20. This provides the housing 10 with good structural stability and facilitates assembly.

[0046] In some embodiments of the present invention, the keyboard 100 further includes a first gasket 61, which is positioned between the edge of the cutoff plate 50 and the top shell 12. In other embodiments of the present invention, the keyboard 100 further includes a second gasket 62, which is positioned between the edge of the cutoff plate 50 and the bottom shell 20, thereby further improving the shock absorption effect.

[0047] The circuit board 30 can be connected to or fixed to the front shell 12 or the bottom shell 20. In some embodiments of the present invention, the circuit board 30 is connected to the side of the fixing layer 11 facing the bottom shell 20. This not only places the circuit board 30 close to the front shell 12, facilitating the triggering of the sensor 32 by the trigger member 44, but also blocks sound, achieving a better noise reduction effect.

[0048] Combine Figure 4 In some embodiments of the present invention, the circuit board is provided with a plurality of key through holes 311 and a sensing portion 32, a sensing portion 32 is arranged near a key through hole 311, the key structure 40 further includes a mounting seat 41, the shaft body includes a key shaft 43 and a trigger member 44 installed on the key shaft 43, the mounting seat is aligned with the key through hole 311, a sliding hole 411 is opened in the mounting seat 41, the key shaft 43 is slidably installed in the sliding hole 411, and the trigger member 44 is used to trigger the corresponding sensing portion 32; the reset member 42 is a reset spring, and the two ends of the reset spring are respectively connected to the mounting seat 41 and the key shaft 43.

[0049] The trigger member 44 and the sensing portion 32 can be of various types. For example, the trigger member 44 can be a magnetic member and the sensing portion 32 can be a Hall element. When the magnetic member moves under the drive of the key shaft 43, the Hall element senses the change in the surrounding magnetic field and generates an induction signal. In another example, the trigger member 44 can be a reflective member and the sensing portion 32 can be a photoelectric sensor. When the key is pressed, the detection light emitted by the transmitting end of the photoelectric sensor hits the reflective member, is reflected, and is received by the receiving end, thereby generating an induction signal. There are many other specific implementations of the trigger member 44 and the sensing portion 32, which are not listed here one by one.

[0050] Furthermore, the present invention provides a plurality of support columns 21 on the inner bottom surface of the shell 10, and arranges the cut-off plate between the fixed layer and the plurality of support columns. The cut-off plate 50 is supported on the bottom surface of the cut-off plate 50 by the support columns 21, so that when the shaft moves downward until it hits the cut-off piece, the shell 10 supports the cut-off plate 50 through the support columns 21, thereby ensuring the stability of the cut-off plate 50.

[0051] In some embodiments of the present invention, the housing 10 includes a connected top shell 12 and bottom shell 20. A support column 21 is formed on the side of the bottom shell 20 facing the top shell 12. The support column is offset from the key structure. This provides a more compact and stable structure. When the shaft impacts the cutoff plate, the pressure-bearing portion of the cutoff plate can slightly deform to mitigate the impact, preventing most of the impact force from being transmitted to the housing through the support column.

[0052] Furthermore, in some embodiments of the present invention, the cutoff plate 50 includes a plate body 51 and multiple elastic stoppers 52. The multiple elastic stoppers 52 are connected to the plate body 51, with each elastic stopper 52 positioned below a shaft. The support columns 21 support the plate body 51. This effectively supports the plate body 51 through the support columns 21. Furthermore, the support columns 21 do not affect the deformation and displacement of the elastic stoppers 52, allowing the elastic stoppers 52 to effectively reduce shock.

[0053] In some embodiments of the present invention, the keyboard 100 further includes a first buffer pad 81, which is disposed on the side of the cutoff plate 50 facing the bottom plate. The first buffer pad 81 defines a plurality of first openings 811, with each first opening 811 aligned with an elastic stopper 52. The support column 21 abuts against the first buffer pad 81 to support the plate body 51. This helps absorb vibrations and reduce direct impacts on the cutoff plate 50.

[0054] The first buffer pad 81 can be made of rubber, silicone, or other materials, which are not limited here.

[0055] In some embodiments of the present invention, the keyboard 100 further includes a first sound-absorbing layer 71 , which is disposed between the bottom shell 20 and the first buffer pad 81 . The first sound-absorbing layer 71 is provided with a first avoidance hole 711 , and the support column 21 passes through the first avoidance hole 711 and presses against the first buffer pad 81 .

[0056] In some embodiments of the present invention, a limiting post 122 is provided on one side of the surface shell 12 facing the bottom shell 20 to limit the stop plate 50. The limiting post 122 and the support post 21 have the same function, and both can limit the stop plate 50.

[0057] In some embodiments of the present invention, the keyboard 100 further includes a circuit board 30, which is positioned between the fixing layer 11 and the cutoff plate 50. The circuit board 30 is provided with a plurality of key through-holes 311, with each key through-hole 311 corresponding to a shaft. The circuit board 30 also includes an assembly through-hole 33, through which the limiting post 122 passes. This design facilitates precise coordination between the circuit board 30 and other components of the keyboard 100.

[0058] Similarly, in some embodiments of the present invention, the keyboard 100 also includes a second buffer pad 82, which is arranged between the circuit board 30 and the cut-off plate 50. The second buffer pad 82 is provided with a plurality of second openings 821, and a second opening 821 is aligned with a key position through hole 311 for the shaft to pass through, and the limiting column 122 presses against the second buffer pad 82 to limit the cut-off plate 50.

[0059] In some embodiments of the present invention, the keyboard 100 further includes a second sound-absorbing layer 72 , which is disposed between the surface shell 12 and the second buffer pad 82 . The second sound-absorbing layer 72 is provided with a second avoidance hole 721 , and the limiting column 122 passes through the second avoidance hole 721 and presses against the second buffer pad 82 .

[0060] In this way, the first sound-absorbing layer 71 and the elastic limiting part 52 do not affect each other, and the second sound-absorbing layer 72 and the shaft body do not affect each other. Each structure can effectively play its own role. The first sound-absorbing layer 71 and the second sound-absorbing layer 72 help to reduce the noise of the keyboard 100 during use. The first buffer pad 81 and the second buffer pad 82 can further absorb vibration and improve stability.

[0061] Considering that when the impact force exerted by the shaft on the cutoff plate 50 is relatively small, the vibration amplitude of the cutoff plate 50 is relatively small. Even without the action of the buffer pad and the limiting post 122, the vibration energy is hardly transmitted to the fixed layer 11. Therefore, in some embodiments of the present invention, the spacing between the limiting post 122 and the cutoff plate 50 is not less than 1 mm and not more than 2 mm. Specifically, it can be 1 mm, 1.2 mm, 1.5 mm, 1.7 mm, 2 mm, etc. In this way, when the amplitude of the cutoff plate 50 is relatively small, no force will be generated between the limiting post 122 or the generated force will be relatively small, thereby preventing the vibration of the cover 12 and the generation of sound.

[0062] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A keyboard (100), characterized in that: include: A housing (10), wherein the inner bottom surface of the housing (10) is provided with a plurality of support columns (21); A fixed layer (11) is installed in the housing (10); A plurality of key structures (40), wherein the plurality of key structures (40) are installed at intervals on the fixed layer (11) and partially exposed from the housing, each of the key structures (40) comprises a shaft and a reset member (42), wherein the shaft can be movably arranged relative to the fixed layer (11) toward the bottom surface of the housing, and the reset member (42) is used to reset the shaft; as well as A cutoff plate (50) is provided in the housing (10) and is located between the fixed layer (11) and the plurality of support columns (21). The support columns (21) are supported on the bottom surface of the cutoff plate (50). The cutoff plate (50) is used to limit the downward movement of the shaft body.

2. The keyboard (100) according to claim 1, characterized in that The housing (10) comprises a surface shell (12) and a bottom shell (20) connected to each other. The bottom shell (20) is formed with the support column (21) on a side facing the surface shell (12). The support column is staggered with the key structure.

3. The keyboard (100) according to claim 2, characterized in that The cutoff plate (50) comprises a plate body (51) and a plurality of elastic limiting portions (52), wherein the plurality of elastic limiting portions (52) are connected to the plate body (51), and one elastic limiting portion (52) is located below one of the shaft bodies; The support column (21) supports the plate body (51).

4. The keyboard (100) according to claim 3, characterized in that The keyboard (100) further comprises a first buffer pad (81), the first buffer pad (81) being located on a side of the cut-off plate (50) facing the bottom plate, and the support column (21) abutting against the first buffer pad (81) to support the plate body (51).

5. The keyboard (100) according to claim 4, characterized in that The keyboard (100) further comprises a first sound-absorbing layer (71), the first sound-absorbing layer (71) being arranged between the first buffer pad (81) and the bottom shell (20), the first sound-absorbing layer (71) being provided with a first avoidance hole (711), the support column (21) passing through the first avoidance hole (711) and abutting against the first buffer pad (81); The first buffer pad (81) is provided with a plurality of first openings (811), and one of the first openings (811) is aligned with one of the elastic limiting portions (52).

6. The keyboard (100) according to any one of claims 2 to 5, characterized in that: A limiting column (122) is provided on one side of the surface shell (12) facing the bottom shell (20) to limit the stop plate (50).

7. The keyboard (100) according to claim 6, characterized in that The keyboard (100) further comprises a circuit board (30), wherein the circuit board (30) is located between the fixing layer (11) and the cut-off plate (50), and the circuit board (30) is provided with a plurality of key position through holes (311), wherein one key position through hole (311) is aligned with one shaft body, and the circuit board (30) is provided with an assembly through hole (33), and the limiting column (122) passes through the assembly through hole (33).

8. The keyboard (100) according to claim 7, characterized in that The keyboard (100) further includes a second buffer pad (82), the second buffer pad (82) being arranged between the circuit board (30) and the cut-off plate (50), the second buffer pad (82) being provided with a plurality of second openings (821), one of the second openings (821) being aligned with one of the key through holes (311) for the shaft to pass through, and the limiting column (122) abutting against the second buffer pad (82) to limit the cut-off plate (50).

9. The keyboard (100) according to claim 8, characterized in that The keyboard (100) further comprises a second sound-absorbing layer (72), the second sound-absorbing layer (72) being arranged between the surface shell (12) and the second buffer pad (82), the second sound-absorbing layer (72) being provided with a second avoidance hole (721), the limiting column (122) passing through the second avoidance hole (721) and abutting against the second buffer pad (82).

10. The keyboard (100) according to claim 6, characterized in that The distance between the limiting column (122) and the cut-off plate (50) is not less than 1 mm and not more than 2 mm.

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