Keyboard

Abstract

The utility model discloses a keyboard, which comprises a shell, a fixed layer, a plurality of key structures and a cut-off piece, and is characterized in that the fixed layer is connected to the shell; the key structure is installed on the fixing layer, the key structure comprises a shaft body, a reset piece and a key cap, the shaft body can slide relative to the fixing layer, the reset piece is used for resetting the shaft body, and the key cap is installed at the top end of the shaft body; and the cut-off piece is connected to the shell, the cut-off piece is used for limiting the downward movement of the shaft body, and the distance between the shaft body and the cut-off piece is smaller than the distance between the keycap and the fixing plate. According to the scheme, when the key structure is pressed down, the shaft body and the key cap move downwards together, when the shaft body abuts against the cut-off piece, a certain interval exists between the key cap and the fixing plate, the fixing layer is not affected by the key cap, and the mistaken touch risk caused by the fact that the key structure installed on the fixing layer is affected by vibration is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to input device technical field, especially a keyboard. BACKGROUND

[0002] The keyboard is a kind of instruction and data input device for operating equipment to run, and has been widely used in people's work, entertainment and other scenes.Currently, some keyboards in market are provided with fixed layer, circuit board is arranged between fixed layer and keyboard bottom shell, and key structure is installed in fixed layer, when key structure moves downward, circuit board can generate sensing signal by light induction, magnetic induction or contact induction, to realize data input.

[0003] However, the key structure in the existing keyboard is limited downward by fixed layer to key shaft, and fixed layer vibrates when key shaft moves downward, which will affect other key structures installed in fixed layer, and long-term use can cause the stability of fixed layer to decline, and multiple key mis-touching problem occurs, which reduces the service life of keyboard. UTILITY MODEL CONTENT

[0004] The utility model aims at reducing the vibration of fixed layer when keyboard is struck.

[0005] To achieve the above-mentioned purpose, the utility model provides a keyboard, which comprises:

[0006] A shell;

[0007] A fixed layer connected to the shell;

[0008] A plurality of key structures installed in the fixed layer, the key structure comprising a shaft body, a reset member and a key cap, the shaft body being slidable relative to the fixed layer, the reset member being used to reset the shaft body, and the key cap being installed at the top end of the shaft body;And

[0009] A stopper connected to the shell, the stopper being used to limit the downward movement of the shaft body, and the distance between the shaft body and the stopper being less than the distance between the key cap and the fixed plate.

[0010] In some embodiments of the utility model, the key structure further comprises a mounting seat, the mounting seat being fixed to the fixed layer, the shaft body being slidably installed in the mounting seat, and the maximum stroke of the shaft body relative to the mounting seat being greater than the distance between the shaft body and the stopper.

[0011] In some embodiments of the utility model, the mounting seat is provided with a mounting groove, the shaft body is in sliding fit with the mounting groove, the groove wall of the mounting groove is provided with a limiting hole, the outer periphery of the shaft body is provided with a clamping hook, the clamping hook is in sliding fit with the limiting hole, and the length of the limiting hole is greater than the distance between the shaft body and the cutoff piece.

[0012] In some embodiments of the utility model, the shaft body comprises a main shaft and a clamping arm, the clamping arm has a fixed end connected with the main shaft and a free end away from the main shaft, the free end extends along the axial direction of the main shaft, and an avoiding interval is arranged between the free end and the main shaft, and the free end is formed with the clamping hook.

[0013] In some embodiments of the utility model, the bottom wall of the mounting groove is provided with a sliding hole, the main shaft is in fit with the sliding hole, the reset piece is a reset spring, the reset spring is sleeved outside the main shaft, one end of the reset spring is located in the avoiding interval, and the reset spring is pressed between the fixed end and the bottom wall of the mounting groove.

[0014] In some embodiments of the utility model, the bottom wall of the mounting groove is provided with a seat ring, the sliding hole is arranged in the seat ring, one end of the reset spring close to the bottom wall of the mounting groove is sleeved outside the seat ring, and the distance between the seat ring and the fixed end is greater than the distance between the shaft body and the cutoff piece.

[0015] In some embodiments of the utility model, the keyboard further comprises a circuit board, the circuit board is provided with a plurality of key position through holes and a plurality of sensing parts, one sensing part is arranged close to one key position through hole, the shaft body further comprises a trigger piece, the trigger piece is installed on the main shaft, one sliding hole is aligned with one key position through hole, and the trigger piece is used for triggering the corresponding sensing part.

[0016] In some embodiments of the utility model, one side of the fixed end facing the avoiding interval is concavely provided with a clamping groove, and the end of the reset spring is limited in the clamping groove.

[0017] In some embodiments of the utility model, the distance between the key cap and the fixed plate and the distance between the shaft body and the cutoff piece are not less than 1.1 and not more than 2.

[0018] In some embodiments of the utility model, the inner side of the key cap is provided with a plug-in sleeve, and the top end of the shaft body is in interference fit in the plug-in sleeve.

[0019] Through the above-described solution, when the key structure is pressed, the switch and keycap move downwards together. Since the distance between the switch and the stop piece is smaller than the distance between the keycap and the fixing plate, there is a certain gap between the keycap and the fixing plate when the switch hits the stop piece. The fixing layer is not affected by the keycap, and the vibration generated by the collision between the key switch and the stop piece is separated from the fixing layer. The vibration impact on the fixing layer is small. When the keyboard is hit at high frequency, the fixing layer can remain stable, effectively extending the life of the fixing layer and avoiding the risk of accidental touch due to vibration affecting the key structure installed on the fixing layer. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A schematic diagram of a keyboard embodiment provided by this utility model;

[0022] Figure 2 A cross-sectional view of an embodiment of the keyboard provided by this utility model;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is a schematic diagram of one embodiment of the button structure provided by this utility model.

[0025] Explanation of icon numbers:

[0026] 1. Keyboard; 11. Shell; 12. Fixing layer; 13. Key structure; 131. Switch; 1311. Spindle; 1312. Snap-fit ​​arm; 1313. Fixed end; 1314. Free end; 1315. Hook; 1316. Slot; 1317. Clearance interval; 132. Reset component; 133. Keycap; 1331. Insertion sleeve; 14. Cut-off component; 15. Mounting base; 151. Mounting slot; 1511. Limiting hole; 1512. Sliding hole; 1513. Sealing ring; 16. Circuit board; 161. Key through hole; 162. Sensing part; 17. Trigger.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] It should be noted that if the present application embodiments involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0030] In addition, if the present application embodiments involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0031] Please refer to Figures 1 to 4 The present application provides a keyboard 1, which comprises a shell 11, a fixed layer 12, a plurality of key structures 13 and a cutoff piece 14, wherein the fixed layer 12 is connected to the shell 11; the key structure 13 is installed on the fixed layer 12, and the key structure 13 comprises a shaft body 131, a reset piece 132 and a key cap 133, the shaft body 131 can slide relative to the fixed layer 12, the reset piece 132 is used for resetting the shaft body 131, and the key cap 133 is installed at the top end of the shaft body 131; the cutoff piece 14 is connected to the shell 11, and is used for limiting the downward movement of the shaft body 131, and the distance between the shaft body 131 and the cutoff piece 14 is less than the distance between the key cap 133 and the fixed plate.

[0032] Through the above-described solution, when the key structure 13 is pressed, the switch 131 and the keycap 133 move downward together. Since the distance between the switch 131 and the stop member 14 is smaller than the distance between the keycap 133 and the fixing plate, when the switch 131 abuts against the stop member 14, there is a certain gap between the keycap 133 and the fixing plate. The fixing layer 12 is not affected by the keycap 133, and the vibration generated by the collision between the key switch and the stop member 14 is separated from the fixing layer 12. The vibration impact on the fixing layer 12 is small. When the keyboard 1 is hit at high frequency, the fixing layer 12 can remain stable, effectively extending the life of the fixing layer 12 and avoiding the risk of accidental touch due to vibration affecting the key structure 13 installed on the fixing layer 12.

[0033] The shaft 131 can be directly slidably connected to the fixed plate, or it can be connected to the fixed plate via the mounting base 15. Specifically, in some embodiments of this utility model, the button structure 13 further includes a mounting base 15, which is fixed to the fixed layer 12. The shaft 131 is slidably mounted on the mounting base 15, and the maximum relative sliding stroke between the shaft 131 and the mounting base 15 is greater than the distance between the shaft 131 and the stop member 14. By adding the mounting base 15, the shaft 131 slides within the mounting base 15, and the relative sliding stroke between the shaft 131 and the mounting base 15 is greater than the distance between the shaft 131 and the stop member 14, which increases the stability and service life of the button.

[0034] The structure of the aforementioned stopper 14 varies. In some embodiments of this utility model, the stopper 14 is a limiting post connected to the housing. Multiple limiting posts are provided, and each limiting post is positioned opposite to the key shaft to restrict the downward movement of the key shaft.

[0035] Preferably, in some embodiments of this utility model, the stop member 14 is a stop plate, and the edge of the stop plate is detachably connected to the outer shell 11. In this way, when the stop plate is damaged, only the stop plate can be removed and replaced, resulting in lower repair costs and easier assembly.

[0036] The aforementioned cut-off plate can be disposed above or below the fixed layer 12. In some embodiments of this utility model, the cut-off plate is disposed above the fixed layer 12. The cut-off plate has a clearance hole, and the side wall of the key shaft has a limiting protrusion. When the key shaft moves downward in the clearance hole, the limiting protrusion abuts against the upper surface of the cut-off plate, thereby restricting the movement of the key shaft.

[0037] There are several ways to connect the shaft 131 to the mounting base 15. For example, the mounting base 15 has an assembly hole, the shaft 131 is slidably installed in the assembly hole, and the reset piece 132 is installed on the outside of the mounting base 15 and connected to the shaft 131.

[0038] Preferably, in some embodiments of the utility model, the mounting seat 15 is equipped with mounting groove 151, the axle body 131 is equipped with the sliding cooperation with mounting groove 151, the groove wall of mounting groove 151 is equipped with limit hole 1511, the outer periphery of axle body 131 is provided with the clamping hook 1315, the clamping hook 1315 is equipped with the sliding cooperation with limit hole 1511, the length of limit hole 1511 is greater than the spacing of axle body 131 and cutoff piece 14. The design of mounting groove 151 and limit hole 1511 allows axle body 131 to slide in the groove, and the movement of axle body 131 is limited by the cooperation of clamping hook 1315 and limit hole 1511, which ensures that axle body 131 will not move excessively, improves the accuracy and reliability of the key. The design of mounting groove 151 and limit hole 1511 allows axle body 131 to slide in the groove, and the movement of axle body 131 is limited by the cooperation of clamping hook 1315 and limit hole 1511, which ensures that axle body 131 will not move excessively, improves the accuracy and reliability of the key.

[0039] Further, in some embodiments of the utility model, the axle body 131 includes a main shaft 1311 and a clamping arm 1312, the clamping arm 1312 has a fixed end 1313 connected to the main shaft 1311 and a free end 1314 away from the main shaft 1311, the free end 1314 extends along the axial direction of the main shaft 1311, and an avoidance interval 1317 is provided between the free end 1314 and the main shaft 1311, and the free end 1314 forms the clamping hook 1315. The setting of the reset spring ensures that the axle body 131 can quickly return to the initial position after the key is released, improving the response speed and feel of the key.

[0040] In some embodiments of the utility model, the bottom wall of the mounting groove 151 is provided with a sliding hole 1512, the main shaft 1311 cooperates with the sliding hole 1512, the reset member 132 is a reset spring, the reset spring is sleeved outside the main shaft 1311, one end is located in the avoidance interval 1317, and the reset spring is pressed between the fixed end 1313 and the bottom wall of the mounting groove 151. The setting of the reset spring ensures that the axle body 131 can quickly return to the initial position after the key is released, improving the response speed and feel of the key.

[0041] In order to further improve the stability of the shaft body 131, in some embodiments of the utility model, the bottom wall of the mounting groove 151 is provided with a seat ring 1513, the sliding hole 1512 is arranged in the seat ring 1513, one end of the reset spring close to the bottom wall of the mounting groove 151 is sleeved outside the seat ring 1513, and the distance between the seat ring 1513 and the fixed end 1313 is greater than the distance between the shaft body 131 and the cutoff piece 14. The design of the seat ring 1513 provides a fixed point for the reset spring, and the distance between the seat ring 1513 and the fixed end 1313 is greater than the distance between the shaft body 131 and the cutoff piece 14, which helps to reduce the vibration transmission of the key when being pressed, and further stabilizes the key operation.

[0042] In some embodiments of the utility model, the keyboard 1 further comprises a circuit board 16, the circuit board 16 is provided with a plurality of key position through holes 161 and a plurality of sensing parts 162, one sensing part 162 is arranged close to one key position through hole 161, the shaft body 131 further comprises a trigger piece 17, the trigger piece 17 is installed on the main shaft 1311, one sliding hole 1512 is aligned with one key position through hole 161, and the trigger piece 17 is used for triggering the corresponding sensing part 162. The key position through hole 161 and the sensing part 162 on the circuit board 16 cooperate with the trigger piece 17 on the shaft body 131, ensure the accurate transmission of the key signal, and improve the input accuracy of the keyboard 1.

[0043] The trigger piece 17 and the sensing part 162 are various, for example, the trigger piece 17 is a magnetic piece, the sensing part 162 is a hall element, when the magnetic piece moves under the drive of the key shaft, the hall element senses the change of the surrounding magnetic field and generates an induction signal; for example, the trigger piece 17 is a reflective piece, and the sensing part 162 is a photoelectric sensor, when the key is pressed, the detection light emitted by the transmitting end of the photoelectric sensor is reflected after irradiating the reflective piece and is received by the receiving end, and then an induction signal is generated. There are many specific embodiments of the trigger piece 17 and the sensing part 162, which are not listed here.

[0044] In some embodiments of the utility model, one side of the fixed end 1313 facing the avoiding interval 1317 is concavely provided with a clamping groove 1316, and the end of the reset spring is limited in the clamping groove 1316. The clamping groove 1316 of the fixed end 1313 is designed to limit the position of the end of the reset spring, ensure that the spring provides a reset force in the correct position, and enhance the stability and durability of the key.

[0045] When the shaft body 131 abuts against the stop piece 14, both are slightly deformed, so that the key structure 13 can still move downward a small distance after being limited by the stop plate, which can cause the key cap 133 to contact the fixed plate, therefore, the ratio of the distance between the key cap 133 and the fixed plate to the distance between the shaft body 131 and the stop piece 14 should not be too small, and considering the compactness of the structure, the ratio of the two distances should not be too large, preferably, in some embodiments of the utility model, the ratio of the distance between the key cap 133 and the fixed plate to the distance between the shaft body 131 and the stop piece 14 is not less than 1.1 and not greater than 2. The specific ratio can be 1.1, 1.2, 1.4, 1.5, 1.7, 1.8, 1.9, 2, etc., by controlling the ratio of the distance between the key cap 133 and the fixed plate to the distance between the shaft body 131 and the stop piece 14 to be between 1.1 and 2, the feel and stability of the key are optimized.

[0046] The specific connection mode of the key cap 133 and the shaft body 131 is various, in some embodiments of the utility model, the key cap 133 is clamped with the shaft body 131. Preferably, in another embodiment of the utility model, the inner side of the key cap 133 is provided with a plug sleeve 1331, and the top end of the shaft body 131 is interference fitted in the plug sleeve 1331. The interference fit of the plug sleeve 1331 on the inner side of the key cap 133 and the top end of the shaft body 131 ensures the close connection between the key cap 133 and the shaft body 131, and improves the overall stability and durability of the key.

[0047] When the key cap 133 is pressed, the key cap 133 and the shaft body move downward together, the mounting seat is gradually accommodated in the key cap 133, and the mounting seat does not contact the key cap 133, or the mounting seat does not limit the key cap in the up-down direction.

[0048] The above is only an exemplary embodiment of the utility model, and does not limit the patent range of the utility model, any equivalent structural transformation made by using the utility model specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A keyboard (1) characterized in that, The application relates to a key structure, which comprises the following parts: a shell (11); a fixed layer (12) connected to the shell (11); a plurality of key structures (13) mounted on the fixed layer (12), wherein the key structure (13) comprises a shaft body (131), a reset member (132) and a key cap (133), the shaft body (131) can slide relative to the fixed layer (12), the reset member (132) is used for resetting the shaft body (131), and the key cap (133) is mounted on the top end of the shaft body (131); a stop member (14) connected to the shell (11), which is used for limiting the downward movement of the shaft body (131), and the distance between the shaft body (131) and the stop member (14) is smaller than the distance between the key cap (133) and the fixed layer. The ratio of the distance between the key cap (133) and the fixed layer to the distance between the shaft body (131) and the stop member (14) is not less than 1.1 and not more than 2.

2. A keyboard (1) as claimed in claim 1, characterized in that The key structure (13) further comprises a mounting seat (15) fixed to the fixed layer (12), the shaft body (131) is slidingly mounted on the mounting seat (15), and the maximum stroke of the shaft body (131) relative to the mounting seat (15) is greater than the distance between the shaft body (131) and the stop member (14).

3. A keyboard (1) as claimed in claim 1 or 2, characterized in that The mounting seat (15) is provided with a mounting groove (151), the shaft body (131) is slidingly matched with the mounting groove (151), the groove wall of the mounting groove (151) is provided with a limiting hole (1511), the outer periphery of the shaft body (131) is provided with a clamping hook (1315), the clamping hook (1315) is slidingly matched with the limiting hole (1511), and the length of the limiting hole (1511) is greater than the distance between the shaft body (131) and the stop member (14).

4. A keyboard (1) as claimed in claim 3, characterized in that The shaft body (131) comprises a main shaft (1311) and a clamping arm (1312), the clamping arm (1312) has a fixed end (1313) connected to the main shaft (1311) and a free end (1314) away from the main shaft (1311), the free end (1314) extends along the axial direction of the main shaft (1311) and is provided with an avoiding interval from the main shaft (1311), and the free end (1314) is formed with the clamping hook (1315).

5. A keyboard (1) as claimed in claim 4, characterized in that The bottom wall of the mounting groove (151) is provided with a sliding hole (1512), the main shaft (1311) is matched with the sliding hole (1512), the reset member (132) is a reset spring, the reset spring is sleeved outside the main shaft (1311) and located in the avoiding interval at one end, and the reset spring is pressed between the fixed end (1313) and the bottom wall of the mounting groove (151).

6. A keyboard (1) as claimed in claim 5, characterized in that ​ 7. A keyboard (1) as claimed in claim 6, characterized in that The bottom wall of the mounting groove (151) is provided with a seat ring (1513), the sliding hole (1512) is arranged in the seat ring (1513), one end of the reset spring close to the bottom wall of the mounting groove (151) is sleeved outside the seat ring (1513), and the distance between the seat ring (1513) and the fixed end (1313) is greater than the distance between the shaft body (131) and the cutoff piece (14).

8. A keyboard (1) as claimed in claim 6, characterized in that The keyboard (1) further comprises a circuit board (16), the circuit board (16) is provided with a plurality of key position through holes (161) and a plurality of sensing parts (162), one sensing part (162) is arranged close to one key position through hole (161), the shaft body (131) further comprises a trigger piece (17), the trigger piece (17) is installed on the main shaft (1311), one sliding hole (1512) is aligned with one key position through hole (161), and the trigger piece (17) is used for triggering the corresponding sensing part (162).

9. A keyboard (1) as claimed in claim 6, characterized in that The fixed end (1313) is recessed with a clamping groove (1316) on the side facing the avoiding interval, and the end of the reset spring is limited in the clamping groove (1316).

10. A keyboard (1) as claimed in claim 1 or 2, characterized in that The inner side of the key cap (133) is provided with an insertion sleeve (1331), and the top end of the shaft body (131) is interference-fitted in the insertion sleeve (1331).

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