Key structure and hair cutting device

Abstract

The embodiment of the utility model discloses a key structure and a hair cutting device. The key structure comprises a shell, a key and an elastic piece, a mounting hole is formed in the shell, and the key is mounted in the mounting hole; a limiting surface and a supporting surface are arranged in the axial direction of the mounting hole at intervals, and the limiting surface is located on the outer side of the supporting surface and faces the inner side of the mounting hole; one end of the elastic piece abuts against the supporting face, and the other end of the elastic piece abuts against the key. A limiting protrusion is arranged on the periphery of the key, the limiting protrusion moves between the limiting face and the supporting face, and the limiting protrusion can abut against the limiting face. According to the utility model, a fixed path is provided for the movement of the key through the limiting surface and the supporting surface, and the key cannot be shaken, loosened or clamped due to the action of external force, so that the overall stability and durability of the key are improved. And meanwhile, the key is prevented from being separated from the mounting hole through the limiting bulge.

Description

Technical Field

[0001] The present application relates to the field of personal care, and particularly to a key structure and a hair cutting device. Background Art

[0002] A hair cutting device is almost a shaving tool that every adult man needs to use every day. However, its key is prone to sticking or not fully returning to the original state when pressed or released, or loosening or shaking during use, thereby affecting the overall service life and user experience of the product. Especially in the case of frequent operation or long-term use, the key of the razor often shows key jamming or loosening, which directly affects the reliability and stability of the key structure.

[0003] The above content is only used to assist in understanding the technical solution of the utility model, and does not represent an admission that the above content is prior art. Summary of the Utility Model

[0004] In view of the above problems, the present utility model provides a key structure, aiming to solve the technical problems of easy jamming or loosening of the key.

[0005] To achieve the above object, the key structure provided by the present utility model includes a housing, a key, and an elastic member. Among them, an installation hole is provided on the housing, and the key is installed in the installation hole; a limiting surface and a supporting surface are spaced apart in the axial direction of the installation hole, the limiting surface is located outside the supporting surface and faces the inside of the installation hole;

[0006] One end of the elastic member abuts against the supporting surface, and the other end abuts against the key; a limiting protrusion is provided on the periphery of the key, the limiting protrusion moves between the limiting surface and the supporting surface, and the limiting protrusion can abut against the limiting surface to prevent the key from detaching from the installation hole.

[0007] Further, the installation hole includes a first hole and a second hole that communicate with each other, the first hole is located outside the second hole, the cross-sectional area of the first hole is smaller than the cross-sectional area of the second hole, the connection between the first hole and the second hole forms the limiting surface, and the supporting surface is located at one end of the second hole away from the first hole.

[0008] Further, the key structure further includes a circuit board provided in the housing, and a key switch is provided on the side of the circuit board facing the key;

[0009] The key includes a cap and a rod body, the limiting protrusion is connected to the periphery of the cap, and the rod body is connected to the inside of the cap and corresponds to the key switch.

[0010] Further, a plurality of elastic members are provided, and the plurality of elastic members are arranged at intervals around the rod body.

[0011] Further, the length of the button in the first direction is greater than the length in the second direction; the two elastic members are arranged at intervals in the first direction and are located on both sides of the rod body; the first direction, the second direction and the axial direction of the mounting hole are perpendicular to each other in pairs.

[0012] In one embodiment, the limiting protrusion is connected around the periphery of the cap.

[0013] In one embodiment, the button includes at least two limiting protrusions, and the at least two limiting protrusions are connected to the periphery of the cap at intervals.

[0014] Further, the limiting protrusion includes an extension arm extending along the axial direction of the mounting hole and a limiting arm arranged at an angle with the extension arm, and the limiting arm can abut against the limiting surface to prevent the button from detaching from the mounting hole.

[0015] Further, the cap further includes a metal lining, and the metal lining has the integrally formed extension arm and the limiting arm.

[0016] In one embodiment, the housing forms a support wall at one end of the second hole away from the first hole, the wall surface of the support wall facing the first hole is the support surface, and an activity hole corresponding to the button switch is formed in the support wall;

[0017] The button structure further includes a seal, the seal is fixedly connected to the support wall to block the activity hole, and the seal has an elastic part corresponding to the activity hole.

[0018] In one embodiment, the button structure further includes a support frame and a seal, the support frame is arranged in the housing and corresponds to the second hole, the side surface of the support frame facing the first hole is the support surface, and an activity hole corresponding to the button switch is formed in the support frame;

[0019] The seal includes a first seal part and a second seal part, the first seal part is arranged between the support frame and the housing to seal the gap between the support frame and the housing, and the second seal part is arranged in the activity hole to block the activity hole.

[0020] In one embodiment, the housing is made of a metal material; the cap is made of a metal material, or the cap includes a plastic main body and a metal cover covering the outside of the plastic main body.

[0021] In one embodiment, a positioning convex portion is provided on the button and / or the supporting surface, and the elastic member is sleeved on the positioning convex portion.

[0022] A hair cutting device includes the button structure according to any one of the above embodiments.

[0023] The button structure of the present utility model includes a housing, a button, and an elastic member. Among them, an installation hole is provided on the housing, and the button is installed in the installation hole; a limiting surface and a supporting surface are arranged at intervals in the axial direction of the installation hole, the limiting surface is located outside the supporting surface and faces the inside of the installation hole; one end of the elastic member abuts against the supporting surface, and the other end abuts against the button; a limiting protrusion is provided on the periphery of the button, and the limiting protrusion moves between the limiting surface and the supporting surface, and the limiting protrusion can abut against the limiting surface. The present utility model enables the button to have a fixed path of movement through the limiting surface and the supporting surface, and will not show shaking, loosening or key jamming due to the action of external force, thereby increasing the overall stability and durability of the button. At the same time, the button is prevented from detaching from the installation hole through the limiting protrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 Shows a schematic structural diagram of an embodiment of the hair cutting device of the present utility model;

[0026] Figure 2 For Figure 1 Partial structural diagram of the button structure in

[0027] Figure 3 For Figure 1 Top view of the hair cutting device in

[0028] Figure 4 For Figure 3 Partial cross-sectional view along line IV-IV;

[0029] Figure 5 Exploded view of another embodiment of the hair cutting device of the present utility model;

[0030] Figure 6 For Figure 5 Top view of the hair cutting device in

[0031] Figure 7 For Figure 6 Partial cross-sectional view along line VII-VII;

[0032] Figure 8 is Figure 5 the front view of the hair cutting device in

[0033] Figure 9 in Figure 8 the partial sectional view along line IX-IX;

[0034] Figure 10 is the top view (the cutter head part is not shown) of another embodiment of the hair cutting device of the present utility model;

[0035] Figure 11 is Figure 10 the sectional view along line XI-XI;

[0036] Figure 12 is Figure 11 the enlarged view at A in

[0037] Figure 13 is Figure 10 the exploded view of the key structure in

[0038] Explanation of the reference numerals in the drawings:

[0039] Label Name Label Name Label Name 100 Button structure 22 Limit projection 32 Receiving groove 10 Housing 221 Extension arm 40 Seal 11 Mounting hole 222 Limit arm 41 Connecting sleeve 111 Limit surface 24 Rod body 42 First sealing part 112 Support surface 25 Metal inner lining 43 Second sealing part 113 First hole 26 Metal cover 50 Elastic member 114 Second hole 261 Fixing projection 60 Circuit board 115 Support wall 27 Plastic main body 61 Button switch 20 Button 271 Groove 70 Support frame 21 Positioning convex part 28 Cap 90 Moving hole 200 Hair cutting device

[0040] The realization, functional features and advantages of the object of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application. 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 realize it. When the combination of the technical solutions appears to be contradictory or unable to be realized, it should be considered that such a combination of the technical solutions does not exist and is not within the protection scope required by the present utility model.

[0042] 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, then the directional indications are only used to explain the relative state relationship and movement conditions between the components in a certain specific posture. If the specific posture changes, then the directional indications will also change accordingly.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, such descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying 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, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously.

[0044] The present utility model provides a key structure 100.

[0045] In the embodiments of the present utility model, please refer to Figure 1 、 Figure 3 、 Figure 4 、 Figure 8 and Figure 9 , the key structure 100 includes a housing 10, a key 20, and an elastic member 50. The housing 10 can be made of metal or plastic. The housing 10 provides support and protection for the key 20 and its internal components, preventing physical damage from the outside. The key 20 is the direct interface for the user to interact with the device. By pressing the key 20, the user can send instructions or input control information. The elastic member 50 provides a reaction force after the key 20 is pressed, enabling the key 20 to quickly return to its initial position and be ready for the next press.

[0046] The housing 10 is provided with a mounting hole 11, and the key 20 is installed in the mounting hole 11; a limiting surface 111 and a supporting surface 112 are spaced apart in the axial direction of the mounting hole 11. The limiting surface 111 is located outside the supporting surface 112 and faces the inside of the mounting hole 11; one end of the elastic member 50 abuts against the supporting surface 112, and the other end abuts against the key 20. The axial direction of the mounting hole 11 refers to the direction in which the user presses the key 20, usually the direction perpendicular to the surface of the key 20.

[0047] The limiting surface 111 and the supporting surface 112 can limit the movement range of the key 20, preventing the key 20 from shifting or malfunctioning due to uneven or excessive force during use, ensuring that the key 20 is always unobstructed during use. At the same time, the limiting surface 111 and the supporting surface 112 ensure that the key 20 can only move on a predetermined track, providing better support for the key 20, making the feedback of the key 20 more consistent, thereby improving the accuracy of the key 20 operation, making the user input more accurate, and enhancing the user experience.

[0048] The periphery of the key 20 has a limiting protrusion 22. The limiting protrusion 22 moves between the limiting surface 111 and the supporting surface 112, and the limiting protrusion 22 can abut against the limiting surface 111 to prevent the key 20 from detaching from the mounting hole 11.

[0049] The key structure 100 of the present utility model includes a housing 10, a key 20, and an elastic member 50. Among them, an installation hole 11 is provided on the housing 10, and the key 20 is installed in the installation hole 11; a limiting surface 111 and a supporting surface 112 are spaced apart in the axial direction of the installation hole 11, the limiting surface 111 is located outside the supporting surface 112 and faces the inside of the installation hole 11; one end of the elastic member 50 abuts against the supporting surface 112, and the other end abuts against the key 20; a limiting protrusion 22 is provided on the periphery of the key 20, and the limiting protrusion 22 moves between the limiting surface 111 and the supporting surface 112, and the limiting protrusion 22 can abut against the limiting surface 111. The present utility model enables the key 20 to have a fixed path of movement through the limiting surface 111 and the supporting surface 112, and will not show shaking, loosening or key jamming due to the action of external force, thereby increasing the overall stability and durability of the key 20. At the same time, the key 20 is prevented from detaching from the installation hole 11 through the limiting protrusion 22.

[0050] Further, referring to Figure 4 , Figure 9 , Figure 12 , the installation hole 11 includes a first hole 113 and a second hole 114 that are in communication with each other. The first hole 113 is located outside the second hole 114. The cross-sectional area of the first hole 113 is smaller than the cross-sectional area of the second hole 114. A limiting surface 111 is formed at the connection between the first hole 113 and the second hole 114, and the supporting surface 112 is located at one end of the second hole 114 away from the first hole 113.

[0051] In this embodiment, the setting of the first hole 113 and the first hole 113 forms a double-layer nested structure. Such a design can further enhance the stability of the key 20 in the installation hole 11 and reduce the risk of shaking or loosening of the key 20. Specifically, when the key 20 is fully installed, the limiting protrusion 22 will abut against the limiting surface 111, and the limiting protrusion 22 cannot enter the first hole 113 from the second hole 114, so that the key 20 can be effectively prevented from accidentally falling off from the installation hole 11. At the same time, the space of the second hole 114 can play a buffering role, reducing the impact force during the operation of the key 20, protecting the housing 10 and its internal structure, and improving durability.

[0052] Further, referring to Figure 3 and Figure 4, the button structure 100 further includes a circuit board 60 disposed within the housing 10. A button switch is provided on a side of the circuit board 60 facing the button 20. The button 20 includes a cap 28 and a rod 24 connected to the inner side of the cap 28. The limiting protrusion 22 is connected to the periphery of the cap 28. The rod 24 is connected to the inner side of the cap 28 and corresponds to the button switch. The rod 24 can press the button switch. The cap 28 is the part directly contacted and pressed by the user. The rod 24 is the key part for transmitting the pressing force. When the user presses the cap 28, the rod 24 presses the button switch on the circuit board 60, and the button switch generates and outputs a button signal. After receiving the button signal, the processor connected to the button switch performs corresponding operations according to the button signal, such as power-on / off operations, adjusting gears, etc.

[0053] Further, there are multiple elastic members 50, and the multiple elastic members 50 are arranged at intervals around the rod 24.

[0054] In this embodiment, by arranging multiple elastic members 50 around the rod 24, the burden on a single elastic member 50 is effectively reduced, and the overall performance degradation caused by excessive wear or failure of a single elastic member 50 is avoided. The cooperative action of the multiple elastic members 50 helps to improve the stability and durability of the system. At the same time, the multiple elastic members 50 are evenly distributed around the rod 24, enabling uniform distribution of pressure. Compared with a single elastic member 50, this arrangement can reduce local pressure concentration and reduce the problem of local damage or wear of the button 20 that may be caused by a single elastic member 50. Meanwhile, the total elastic force provided by the multiple elastic members 50 is relatively stable, and can more evenly restore the button 20 or other structural components to the original position. This design can improve the overall rebound performance of the system and enhance the user operation experience.

[0055] Further, referring to Figure 1 , Figure 3 and Figure 4 , the length of the button 20 in the first direction is greater than the length in the second direction; two elastic members 50 are arranged at intervals in the first direction and are located on both sides of the rod 24; the first direction, the second direction and the axial direction of the mounting hole are perpendicular to each other in pairs.

[0056] The longer length of the button 20 in the first direction means that the button 20 has a larger contact area and a larger operating surface. At the same time, the shorter length of the button 20 in the second direction can rationally utilize space and ensure the structural strength of the button 20. The two elastic members 50 are arranged at intervals in the first direction. Since the first direction is longer, arranging the elastic members 50 at intervals in this direction can distribute the resilience more evenly. When the button 20 is pressed, the two elastic members 50 can provide symmetric support and resilience, enabling the button 20 to return to its original position smoothly and quickly when released.

[0057] In one embodiment, referring toFigure 13 , the limiting protrusion 22 is circumferentially connected to the periphery of the cap 28. When the limiting protrusion 22 abuts against the limiting surface 111, the limiting protrusion 22 in this embodiment can provide uniformly distributed support. The uniformly distributed support points can reduce local stress and improve the durability and stability of the cap 28 and the overall device. At the same time, the limiting protrusion 22 in this embodiment helps to improve the overall assembly accuracy and stability of the cap 28, making the assembly process simpler and reducing errors.

[0058] In one embodiment, referring to Figure 2 and Figure 5 , the button 20 includes at least two limiting protrusions 22, and the at least two limiting protrusions 22 are spaced and connected to the periphery of the cap 28.

[0059] In this way, the position of the button 20 in the mounting hole 11 will be more stable, avoiding the shaking of the button 20 caused by single-point limiting. And more accurate positioning can be achieved to ensure the accuracy of the button 20 during operation. In some embodiments, multiple limiting protrusions 22 are evenly arranged on both sides of the rod body 24. In this way, more uniform supporting force can be provided, reducing local stress concentration and improving the durability of the button 20.

[0060] Furthermore, referring to Figures 1 to 7 , the limiting protrusion 22 includes an extension arm 221 extending along the axial direction of the mounting hole 11 and a limiting arm 222 arranged at an angle with the extension arm 221. The limiting arm 222 can abut against the limiting surface 111 to prevent the button 20 from detaching from the mounting hole 11.

[0061] In this embodiment, by arranging the limiting arm 222 on the extension arm 221 extending along the axial direction of the mounting hole 11, the extension arm 221 can undergo elastic deformation, so that the button 20 can be inserted into the mounting hole 11 from the outside of the housing 10. During the assembly of the button structure 100, the button 20 is inserted into the mounting hole 11 from the outside of the housing 10. The limiting arm 222 is squeezed by the hole wall of the mounting hole 11, and the extension arm 221 undergoes elastic deformation to make the limiting arm 222 avoid, and the button 20 can be smoothly inserted into the mounting hole 11. After being installed in place, the limiting arm 222 is located in the space of the second hole 114, and the extension arm 221 returns to its original state. Under the elasticity of the elastic member 50, the limiting arm 222 abuts against the limiting surface 111, thereby preventing the button 20 from detaching from the mounting hole 11.

[0062] Furthermore, referring to Figures 2 to 4, the cap 28 further includes a metal inner lining 25 which has integrally formed extension arms 221 and limiting arms 222. The metal inner lining 25 provides higher rigidity, making the key 20 not easily deformed during use, thereby improving the durability and reliability of the key 20. In some embodiments, the integrally formed extension arms 221 and limiting arms 222 made of metal can provide a solid structure and enhance the wear resistance and fatigue resistance of the key 20.

[0063] In one embodiment, referring to Figures 1 to 9 , a support wall 115 is formed at one end of the second hole 114 away from the first hole 113 in the housing 10. The wall surface of the support wall 115 facing the first hole 113 is the support surface 112, and a movable hole 90 corresponding to the key switch is formed on the support wall 115; the key structure 100 further includes a seal 40 which is fixedly connected to the support wall 115 to block the movable hole 90, and the seal 40 has an elastic part corresponding to the movable hole 90.

[0064] In this embodiment, the support wall 115 formed at one end of the second hole 114 away from the first hole 113 in the housing 10 provides stable pressing support for the key 20. The support wall 115 is a part of the housing 10 and the two are integrally designed. Since the structure of the housing 10 is stable, the key 20 will not malfunction due to the easy loosening of the support component. At the same time, integrating the support function into the housing 10 makes the design and manufacturing process simpler, reduces additional components, and improves space utilization.

[0065] The movable hole 90 is used for the rod body 24 to press the key switch on the circuit board 60. The setting of the seal 40 ensures the sealing of the movable hole 90, prevents moisture, dust and other impurities from invading, and improves the protection level of the device. The seal 40 has an elastic part corresponding to the movable hole 90, so that when the key 20 is pressed, the rod body 24 can touch the key switch on the circuit board 60 through the elastic part of the seal 40. In some embodiments, the seal 40 is fixedly connected to the side of the support wall 115 opposite to the support surface 112 to block the movable hole 90. In this way, the elastic member 50 will not act on the seal 40, and thus the wear of the seal 40 caused by frequent pressing can be avoided.

[0066] In one embodiment, referring to Figures 10 to 13, the button structure 100 further includes a support frame 70 and a seal 40. The support frame 70 is disposed within the housing 10 and corresponds to the second hole 114. The side of the support frame 70 facing the first hole 113 is the support surface 112, and an activity hole 90 corresponding to the button switch is formed in the support frame 70; the seal 40 includes a first seal portion 42 and a second seal portion 43. The first seal portion 42 is disposed between the support frame 70 and the housing 10 to seal the gap between the support frame 70 and the housing 10, and the second seal portion 43 is disposed in the activity hole 90 to block the activity hole 90. The second seal portion 43 has an elastic region corresponding to the activity hole 90.

[0067] In this embodiment, the support frame 70 is relatively independent of the housing 10. When assembling the button structure 100, the button 20 can be inserted into the installation hole from the inner side of the housing, then the elastic member 50 is assembled, and finally the support frame 70 is installed at the position corresponding to the second hole 114 within the housing 10. This design has a simple structure and high assembly efficiency. If the button 20 or the support frame 70 is damaged, it is relatively simple to replace the button 20 or the support frame 70, and the maintenance work is more convenient. Through the support provided by the support frame 70, the button 20 can be stably operated, reducing the shaking or deviation of the button 20 and improving the accuracy and stability of the operation. The first seal portion 42 is disposed between the support frame 70 and the housing 10 to seal the gap therebetween, and the second seal portion 43 is disposed in the activity hole 90 to block the activity hole 90, preventing moisture, dust, and other impurities from invading and protecting the internal components from contamination. The second seal portion 43 has an elastic region corresponding to the activity hole 90, so that when the button 20 is pressed, the rod body 24 can press the button switch on the circuit board 60 through the elastic region of the second seal portion 43.

[0068] In one embodiment, the housing 10 is made of a metal material; the cap 28 is made of a metal material, or the cap 28 includes a plastic main body 27 and a metal cover body 26 covering the outside of the plastic main body 27.

[0069] In this embodiment, the housing 10 is made of a metal material. A metal housing 10 is generally stronger than a plastic housing 10, can withstand greater pressure and impact force, and can better protect the internal components from physical damage such as dropping and collision.

[0070] In some embodiments, both the housing 10 and the cap 28 are made of a metal material. The cap 28 is usually made of metal materials such as stainless steel and aluminum alloy. The metal-made cap 28 can effectively protect the button structure 100 from external impact and wear, improving the durability of the button structure 100. At the same time, the cap 28 can provide a firm and clear pressing feedback, enhancing the user's operation experience.

[0071] In some other embodiments, the housing 10 is made of metal, and the cap 28 includes a plastic body 27 and a metal cover 26 covering the outside of the plastic body 27. Using plastic material can reduce the overall weight and cost of the button 20, while having certain elasticity and toughness. The cooperation of the plastic body 27 and the metal cover 26 not only gives play to the strength and texture advantages of the metal, but also makes use of the lightweight and cost advantages of the plastic.

[0072] In certain embodiments, referring to Figure 4 , the housing 10 is made of metal, and the cap 28 includes a plastic body 27, a metal cover 26 covering the outside of the plastic body 27, and a metal lining 25. In this way, the cap 28 achieves a complex shape, lightweight, and low cost through the plastic body 27; improves the structural strength of the cap 28 through the metal cover 26 to avoid physical damage such as dropping and friction of the cap 28; improves the wear resistance of the cap 28 through the metal lining 25 and prevents the cap 28 from breaking due to impact force during pressing and rebounding.

[0073] Furthermore, the metal cover 26 is provided with a fixing protrusion 261 facing the plastic body 27, and the plastic body 27 is provided with a groove 271 corresponding to the fixing protrusion 261, and the protrusion is embedded in the groove 271. The embedding of the fixing protrusion 261 in the groove 271 can effectively prevent loosening between the metal cover 26 and the plastic body 27, ensuring the stability of the button 20 during use.

[0074] In one embodiment, a positioning protrusion 21 is provided on the button 20 and / or the supporting surface 112, and the elastic member 50 is sleeved on the positioning protrusion 21. Referring to Figure 3 , Figure 4 , Figure 6 and Figure 7 , a positioning protrusion 21 is provided on the button 20. One end of the elastic member 50 is sleeved on the positioning protrusion 21, and the other end of the elastic member 50 abuts against the supporting surface 112.

[0075] In some other embodiments, referring to Figure 6 and Figure 7 , a positioning protrusion 21 is provided on the supporting surface 112, and a receiving groove 32 is provided on the button 20. One end of the elastic member 50 is sleeved on the positioning protrusion 21, and the other end of the elastic member 50 is placed in the receiving groove 32 and abuts against the top wall of the receiving groove 32.

[0076] The cooperation of the positioning protrusion 21 and the elastic member 50 can ensure that the movement of the button 20 in the pressing direction is more accurate, avoiding the situation of tilting or offsetting of the button 20 during pressing. At the same time, more precise guidance can be achieved through the positioning protrusion 21, ensuring that each pressing and releasing is along the same trajectory, improving the accuracy of the operation.

[0077] In certain embodiments, referring to Figures 6 to 9, at the position where the seal 40 corresponds to the rod body 24, there is a connecting sleeve 41, and the rod body 24 is embedded in the connecting sleeve 41. In this way, when the button 20 is pressed, the seal 40 around the connecting sleeve 41 may be further compressed, thereby enhancing the sealing performance and ensuring that the inside of the device is not disturbed by the external environment. Through the combination of the rod body 24 and the connecting sleeve 41, the button 20 will be more stable during the pressing process, not easily deviated or rotated, ensuring the reliable triggering of the button 20.

[0078] The present utility model also proposes a hair cutting device 200. The hair cutting device 200 generally refers to a hair clipper, a razor or a similar device for cutting or trimming hair, beard or other hairs. The hair cutting device 200 includes a button structure 100, and the specific structure of the button structure 100 refers to the above-mentioned embodiment. Since the hair cutting device 200 adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated one by one here.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A key structure, characterized in that, It includes a housing, a button, and an elastic member; among them, The housing is provided with a mounting hole, and the button is mounted in the mounting hole; a limiting surface and a supporting surface are spaced apart in the axial direction of the mounting hole, the limiting surface is located outside the supporting surface and faces the inside of the mounting hole; One end of the elastic member abuts against the supporting surface, and the other end abuts against the button; a limiting protrusion is provided on the periphery of the button, and the limiting protrusion moves between the limiting surface and the supporting surface, and the limiting protrusion can abut against the limiting surface to prevent the button from detaching from the mounting hole.

2. The key structure according to claim 1, characterized in that, The mounting hole includes a first hole and a second hole that communicate with each other, the first hole is located outside the second hole, the cross-sectional area of the first hole is smaller than the cross-sectional area of the second hole, the connection between the first hole and the second hole forms the limiting surface, and the supporting surface is located at one end of the second hole away from the first hole.

3. The key structure according to claim 2, wherein, The button structure further includes a circuit board disposed in the housing, and a button switch is provided on a side of the circuit board facing the button; The button includes a cap and a rod body, the limiting protrusion is connected to the periphery of the cap, and the rod body is connected to the inside of the cap and corresponds to the button switch.

4. The key structure according to claim 3, characterized in that, There are multiple elastic members, and the multiple elastic members are arranged at intervals around the rod body.

5. The key structure according to claim 4, characterized in that, The length of the button in the first direction is greater than the length in the second direction; the two elastic members are arranged at intervals along the first direction and are located on both sides of the rod body; the first direction, the second direction, and the axial direction of the mounting hole are perpendicular to each other in pairs.

6. The key structure according to claim 3, wherein, The limiting protrusion is connected around the periphery of the cap.

7. The key structure according to claim 3, characterized in that, The button includes at least two limiting protrusions, and the at least two limiting protrusions are connected to the periphery of the cap at intervals.

8. The key structure according to claim 7, wherein, The limiting protrusion includes an extension arm extending along the axial direction of the mounting hole and a limiting arm disposed at an angle to the extension arm, and the limiting arm can abut against the limiting surface to prevent the button from detaching from the mounting hole.

9. The key structure according to claim 8, characterized in that, The cap further includes a metal lining, and the extension arm and the limiting arm are integrally formed on the metal lining.

10. The key structure according to claim 3, characterized in that, The housing forms a supporting wall at one end of the second hole away from the first hole, the wall surface of the supporting wall facing the first hole is the supporting surface, and a moving hole corresponding to the button switch is provided on the supporting wall; The button structure further includes a sealing member, the sealing member is fixedly connected to the supporting wall to block the moving hole, and the sealing member has an elastic portion corresponding to the moving hole.

11. The key structure according to claim 3, characterized in that The button structure further includes a support frame and a sealing member, the support frame is disposed in the housing and corresponds to the second hole, the side surface of the support frame facing the first hole is the supporting surface, and a moving hole corresponding to the button switch is provided on the support frame; The sealing member includes a first sealing portion and a second sealing portion, the first sealing portion is disposed between the support frame and the housing to seal the gap between the support frame and the housing, and the second sealing portion is disposed in the moving hole to block the moving hole.

12. The key structure according to claim 3, wherein, The housing is made of metal; The cap is made of metal, or, the cap includes a plastic body and a metal cover covering the outside of the plastic body.

13. The key structure according to any one of claims 1-12, characterized in that, The key and / or the support surface are / is provided with positioning protrusions, and the elastic member is sleeved on the positioning protrusions.

14. A hair cutting device, characterized in that, It includes the key structure according to any one of claims 1-13.

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