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 fixing layer is connected to the shell; the key structure is installed on the fixing layer, the key structure 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 till abutting against the cut-off piece, the key shaft and the cut-off piece collide to generate vibration, a vibration source and the fixing layer are spaced, the influence of the vibration on the fixing layer is small, and when the keyboard is knocked at high frequency, the key shaft and the cut-off piece are separated from each other. The fixing layer can be kept stable, the service life of the fixing layer is effectively prolonged, and the risk of mistaken touch caused by the fact that the key structure installed on the fixing layer is affected by vibration is avoided. In addition, when the magnetic part is driven by the key shaft to move, the Hall element induces the change of a surrounding magnetic field and generates an induction signal.

Description

[0001] This application is a divisional application of a Chinese utility model patent application with the application number "202421842128.8", the patent name "Keyboard", and the application date July 31, 2024. Technical Field

[0002] The utility model relates to the technical field of input devices, and particularly relates to a keyboard. Background Art

[0003] A keyboard is a device for inputting instructions and data to operate a device, and it has now been widely used in people's work, entertainment and other scenarios. Currently, some keyboards on the market are provided with a fixed layer. The circuit board is arranged between the fixed layer and the keyboard bottom case, and the key structure is installed on the fixed layer. When the key structure moves downward, the circuit board can generate an induction signal through light induction, magnetic induction or contact induction, etc., to realize data input.

[0004] However, in the existing keyboard, the key structure limits the downward movement of the key shaft through the fixed layer. During the downward movement of the key shaft, it collides with the fixed layer, and the fixed layer generates vibrations, which will affect other key structures installed on the fixed layer. After long-term use, the stability of the fixed layer is likely to decline, resulting in the problem of multi-key misoperation and reducing the service life of the keyboard. Summary of the Utility Model

[0005] The main purpose of the utility model is to propose a keyboard, aiming to reduce the vibration of the fixed layer when the keyboard is struck.

[0006] To achieve the above purpose, the utility model proposes a keyboard, including:

[0007] A housing;

[0008] A fixed layer, connected to the housing;

[0009] A plurality of key structures, the key structures are installed on the fixed layer, the key structure includes a shaft body and a reset member, the shaft body can slide relative to the fixed layer, the shaft body includes a key shaft and a magnetic member installed on the key shaft, and the reset member is used to reset the shaft body; and

[0010] A stop member, connected to the housing, the stop member is used to limit the downward movement of a plurality of the shaft bodies;

[0011] A circuit board, the circuit board is installed in the housing, the circuit board is provided with a plurality of Hall elements, and one Hall element corresponds to the magnetic member of one key structure, and the magnetic member triggers the corresponding Hall element.

[0012] In some embodiments of the present invention, the circuit board is located between the fixed layer and the cutoff member, the circuit board is further provided with a plurality of key through holes for the shaft to pass through, and one of the Hall elements is arranged close to one of the key through holes.

[0013] In some embodiments of the utility model, the key structure also includes a mounting seat, the circuit board is arranged between the fixed layer and the cut-off piece, the mounting seat is aligned with the key position through hole, a sliding hole is opened in the mounting seat, and the key shaft is slidably installed in the sliding hole.

[0014] In some embodiments of the present invention, the reset member is a reset spring, and two ends of the reset spring are respectively connected to the mounting seat and the key shaft.

[0015] In some embodiments of the present invention, the cut-off member is a cut-off plate, and an edge of the cut-off plate is connected to the housing.

[0016] In some embodiments of the present invention, the keyboard further includes a first sound absorbing layer, which is sandwiched between the cutoff plate and the circuit board, and is provided with a plurality of avoidance holes, and the plurality of avoidance holes are aligned one by one with the plurality of shafts.

[0017] In some embodiments of the present invention, the shell includes a front shell and a bottom shell, the bottom shell is connected to the lower side of the front shell, and the keyboard also includes a second sound-absorbing layer, which is sandwiched between the cutoff plate and the bottom shell.

[0018] In some embodiments of the present invention, the keyboard further comprises a first gasket, wherein the first gasket is arranged between the edge of the cut-off plate and the fixing layer;

[0019] In some embodiments of the utility model, the outer shell includes a front shell and a bottom shell, the bottom shell is connected to the lower side of the front shell, the fixed layer is provided with a plurality of installation openings, the front shell cover is arranged outside the fixed layer, the front shell is provided with a clearance hole to expose the installation openings, and the cut-off plate is located between the fixed layer and the bottom shell.

[0020] In some embodiments of the present invention, the keyboard further includes a second gasket, and the second gasket is arranged between the edge of the cut-off plate and the bottom shell.

[0021] With the above solution of the present utility model, when the key structure is pressed, the shaft body moves downward until it abuts against the cut-off member, and the key shaft collides with the cut-off member to generate vibration. The vibration source is spaced apart from the fixed layer, and the fixed layer is less affected by the vibration. When the keyboard is tapped frequently, the fixed layer can remain stable, effectively extending the life of the fixed layer and avoiding the risk of accidental touch of the key structure installed on the fixed layer due to vibration. Moreover, when the magnetic member moves driven by the key shaft, the Hall element senses the change in the surrounding magnetic field and generates an induction signal. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0023] Figure 1 Schematic diagram of the structure of an embodiment of the keyboard provided by the present utility model;

[0024] Figure 2 Exploded view of an embodiment of the keyboard provided by the present utility model;

[0025] Figure 3 For Figure 2 Enlarged view of part A in

[0026] Figure 4 Exploded view of an embodiment of the key structure in the present utility model;

[0027] Figure 5 Cross-sectional view of an embodiment of the keyboard provided by the present utility model;

[0028] Figure 6 For Figure 5 Enlarged view of part B in

[0029] Explanation of the reference numerals in the drawings:

[0030] 100, Keyboard; 10, Housing; 101, Installation Port; 11, Fixed Layer; 12, Front Cover; 121, Relief Hole; 20, Bottom Case; 30, Circuit Board; 311, Key Position Through-Hole; 32, Hall Element; 40, Key Structure; 41, Mounting Base; 411, Slide Hole; 42, Reset Component; 43, Key Shaft; 44, Magnetic Component; 45, Keycap; 50, Cutoff Component; 50’, Cutoff Plate; 51, Plate Body; 511, Main Body; 512, Support Arm; 513, Limit Hole; 514, Partition Opening; 52, Elastic Limiting Portion; 52’, Elastic Cantilever; 521, Arc Arm; 522, Limiting Node; 61, First Gasket; 62, Second Gasket; 71, First Sound Absorbing Layer; 711, Avoidance Hole; 72, Second Sound Absorbing Layer.

[0031] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific Embodiments

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the protection scope of the present utility model.

[0033] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions such as "first" and "second" involved in the embodiments of the present utility model, the descriptions of "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0035] Please refer to Figures 1 to 6The utility model proposes a keyboard 100, including a shell 10, a fixed layer 11, a plurality of key structures 40 and a cut-off piece 50; the fixed layer 11 is connected to the shell 10; the key structure 40 is installed on the fixed layer 11, the key structure 40 includes a shaft and a reset piece 42, the shaft can slide relative to the fixed layer 11, and the reset piece 42 is used to reset the shaft; the cut-off piece 50 is connected to the shell 10, and the cut-off piece 50 is used to limit the downward movement of the shaft.

[0036] Through the above scheme, when the key structure 40 is pressed, the shaft moves downward until it hits the cut-off piece 50, and the key shaft 43 collides with the cut-off piece 50 to generate vibration. The vibration source is spaced apart 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 of the key structure 40 installed on the fixed layer 11 due to the influence of vibration.

[0037] 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 to the shell 10, or can be integrally formed, depending on the specific situation and is not limited here.

[0038] 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 slipping out of the sliding hole 411.

[0039] 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 limit column connected to the shell, and a plurality of limit columns are provided. Each limit column is respectively positioned opposite to the key shaft 43 to limit the key shaft 43 from moving downward.

[0040] 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 for replacement, which has low replacement cost and is convenient for assembly.

[0041] The above-mentioned cut-off plate 50' can be arranged above the fixed layer 11, and can also be arranged below the fixed layer 11. In some embodiments of the utility model, the cut-off plate 50' is arranged above the fixed layer 11, and the cut-off 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 moves downward in the avoidance hole 711, the limiting protrusion presses against the upper surface of the cut-off plate 50', thereby limiting the movement of the key shaft 43.

[0042] In order to further improve the shock absorption effect, in some embodiments of the present invention, the cutoff plate 50' includes a plate body 51 and a plurality of elastic limiting parts 52, the edge of the plate body 51 is fixed to the housing 10, the plurality of elastic limiting parts 52 are connected to the plate body 51, and one elastic limiting part 52 is located below a shaft body. In this way, when the key shaft 43 contacts the elastic limiting part 52, a flexible impact is generated, and the shock absorption effect is better. In addition, since the vibration source is located below the fixed layer 11, the knocking sound generated by the vibration source will be greatly weakened when it is transmitted to the keyboard 100, which has a noise reduction effect.

[0043] 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, which can be directly obtained by hot pressing, injection molding or 3D printing, etc., which is conducive to reducing the number of parts and reducing the complexity of the structure. In addition, the elastic limiting portion 52 will not increase the overall thickness of the cut-off member 50, which is conducive to improving the compactness of the structure.

[0044] 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 respectively connected to the opposite sides of the limit joint 522, and the other end is connected to the hole wall of the limit hole 513. With such a configuration, the elastic cantilever 52' has a better shock absorbing effect.

[0045] In some embodiments of the present invention, the plate body 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 a partition opening 514 is formed between the support arm 512, and the support arm 512 is connected to the housing 10. In this way, when the vibration propagates from the center of the plate body 51 to the edge, the vibration wave passing through the partition opening 514 is isolated, and only a small part of the vibration propagates to the support arm 512, so that the shock absorption effect is better.

[0046] In some embodiments of the present invention, the housing 10 includes a front housing 12 and a bottom housing 20, the bottom housing 20 is connected to the lower side of the front housing 12, the fixing layer 11 is provided with a plurality of mounting openings 101, the front housing 12 is covered outside the fixing layer, the front housing is provided with a clearance hole 121 to expose the mounting openings 101, and the stop plate 50' is located between the fixing layer 11 and the bottom housing 20. In this way, the housing 10 has good structural stability and is easy to assemble.

[0047] In some embodiments of the present utility model, the keyboard 100 further includes a first gasket 61, and the first gasket 61 is disposed between the edge of the cut-off plate 50' and the front shell 12. In some other embodiments of the present utility model, the keyboard 100 further includes a second gasket 62, and the second gasket 62 is disposed between the edge of the cut-off plate 50' and the bottom shell 20, further improving the damping effect.

[0048] In some embodiments of the present utility model, the keyboard 100 further includes a circuit board 30, the circuit board is installed in the outer shell 10, and the circuit board 30 is located between the fixed layer 11 and the cut-off plate 50'; the keyboard 100 further includes a first sound-absorbing layer 71, and the first sound-absorbing layer 71 is clamped between the cut-off plate 50' and the circuit board 30. The first sound-absorbing layer 71 is provided with a plurality of avoidance holes 711, and the plurality of avoidance holes 711 are in one-to-one correspondence with the plurality of key shafts 43. In some other embodiments of the present utility model, the keyboard 100 further includes a second sound-absorbing layer 72, and the second sound-absorbing layer 72 is clamped between the cut-off plate 50' and the bottom shell 20. In this way, the two sound-absorbing layers can play a role in sound absorption, and the noise reduction effect is better.

[0049] The above circuit board 30 can be connected and fixed to the front shell 12 or the bottom shell 20. In some embodiments of the present utility model, the circuit board 30 is connected to the surface of the fixed layer 11 facing the bottom shell 20. On the one hand, the circuit board 30 is close to the front shell 12, which is convenient for the sensing member to be triggered by the triggering member. On the other hand, the circuit board 30 can play a role in blocking sound, and the noise reduction effect is better.

[0050] Combined Figure 4 With, in some embodiments of the present utility model, the circuit board is provided with a plurality of key position through holes 311 and sensing members. A sensing member is disposed close to a key position through hole 311. The key structure 40 further includes a mounting seat 41. The shaft body includes a key shaft 43 and a triggering member mounted on the key shaft 43. The mounting seat is aligned with the key position through hole 311. A sliding hole 411 is formed in the mounting seat 41, and the key shaft 43 is slidably mounted in the sliding hole 411. The triggering member is used to trigger the corresponding sensing member; the reset member 42 is a reset spring, and both ends of the reset spring are respectively connected to the mounting seat 41 and the key shaft 43.

[0051] The types of the triggering member and the sensing member are diverse. For example, the triggering member is a magnetic member 44, and the sensing member is a Hall element 32. When the magnetic member 44 moves under the drive of the key shaft 43, the Hall element 32 senses the change of the surrounding magnetic field and generates an induction signal; another example is that the triggering member is a reflective member, and the sensing member is a photoelectric sensor. When the key is pressed, the detection light emitted by the emitting end of the photoelectric sensor irradiates the reflective member and is reflected, and then is received by the receiving end, thereby generating an induction signal. There are many specific implementation manners of the triggering member and the sensing member, which will not be listed one by one here.

[0052] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A keyboard, characterized in that, Comprising: A housing (10); A fixing layer (11) connected to the housing (10); A plurality of key structures (40), the key structures (40) being mounted on the fixing layer (11), the key structures (40) comprising a shaft body and a reset member (42), the shaft body being slidable relative to the fixing layer (11), the shaft body comprising a key shaft (43) and a magnetic member (44) mounted on the key shaft (43), the reset member (42) being used for resetting the shaft body; And A stop member (50) connected to the housing, the stop member (50) being used for limiting the downward movement of the shaft body; A circuit board (30), the circuit board being mounted inside the housing (10), the circuit board being provided with a plurality of Hall elements (32), one Hall element (32) corresponding to the magnetic member (44) of one key structure (40), the magnetic member (44) triggering the corresponding Hall element (32).

2. The keyboard according to claim 1, wherein, The circuit board (30) is located between the fixing layer (11) and the stop member (50), and the circuit board is further provided with a plurality of key position through holes for the shaft body to pass through, and one Hall element (32) is arranged close to one key position through hole (311).

3. The keyboard according to claim 2, wherein The key structure (40) further comprises a mounting seat (41), the circuit board is arranged between the fixing layer and the stop member, the mounting seat (41) is aligned with the key position through hole (311), a sliding hole (411) is formed in the mounting seat (41), and the key shaft (43) is slidably mounted in the sliding hole (411).

4. The keyboard according to claim 3, wherein The reset member (42) is a reset spring, and two ends of the reset spring are respectively connected to the mounting seat (41) and the key shaft (43).

5. The keyboard according to any one of claims 2 to 4, characterized in that, The stop member (50) is a stop plate (50'), and an edge of the stop plate (50') is connected to the housing (10).

6. The keyboard according to claim 5, wherein The keyboard (100) further comprises a first sound absorption layer (71), the first sound absorption layer (71) is clamped between the stop plate (50') and the circuit board (30), the first sound absorption layer (71) is provided with a plurality of avoidance holes (711), and the plurality of avoidance holes (711) are aligned with the plurality of shaft bodies one by one.

7. The keyboard according to claim 5, wherein, The housing (10) comprises a front shell (12) and a bottom shell (20), the bottom shell (20) is connected to the lower side of the front shell (12), the keyboard (100) further comprises a second sound absorption layer (72), and the second sound absorption layer (72) is clamped between the stop plate (50') and the bottom shell (20).

8. The keyboard according to claim 5, wherein, The keyboard (100) further comprises a first gasket (61), and the first gasket (61) is disposed between the edge of the stop plate (50') and the fixing layer (11).

9. The keyboard according to claim 5, wherein, The housing (10) includes a front shell (12) and a bottom shell (20). The bottom shell (20) is connected to the lower side of the front shell (12). The fixing layer (11) is provided with a plurality of mounting openings (101). The front shell (12) covers the outside of the fixing layer. The front shell is provided with a relief hole (121) to expose the mounting openings (101). The cut-off plate (50') is located between the fixing layer (11) and the bottom shell (20).

10. The keyboard according to claim 9, characterized in that, The keyboard (100) further includes a second gasket (62). The second gasket (62) is disposed between the edge of the cut-off plate (50') and the bottom shell (20).

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