Key structure and hair straightening comb using same
By designing a key structure that can switch between self-locking and unlocking, the problem of the fine key structure of equipment such as straight hair combs is easily opened by mistake, improving safety and use effect in limited space.
Patent Information
- Application Number
- CN202421596949.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-05
AI Technical Summary
The fine button structure of existing straight hair combs and other equipment is easy to be opened by mistake, which poses safety risks, and it is difficult to improve in a limited space.
A key structure including a pressing member and a pressing member bracket is designed. By switching the self-locking and unlocking states, it is ensured that the pressing member can perform a pressing operation in the unlocking state, but cannot be pressed in the self-locking state, thereby improving safety.
It effectively prevents accidentally touching and opening, improves safety in limited space, and solves the safety hazards of fine button structures in the prior art.
Smart Images
Figure CN222775188U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of key structures. Background Art
[0002] The common button design switch of the existing straightening comb is more convenient, but less consideration is given to the safety of accidentally touching the switch. The straightening comb usually achieves straightening by heating the hair. Once the switch is accidentally touched without noticing, the comb teeth of the straightening comb heat the objects they touch, which can easily cause fires if they touch flammable objects such as clothing, mats, and wires. Secondly, the button structure of small handheld instruments such as straightening combs or curling irons is usually more delicate, and how to improve it in a limited space is also a problem. In summary, the existing delicate button structure similar to the straightening comb is easy to be accidentally touched and turned on, which poses certain safety hazards. It is difficult to develop the safety of accidentally touching the switch. It is necessary to provide a button structure that improves safety in a limited space. Utility Model Content
[0003] The main purpose of the utility model is to provide a button structure to improve safety in a limited space, aiming to solve the technical problem that the fine button structure similar to a hair straightening comb in the prior art is easy to be accidentally opened and there is a safety hazard.
[0004] To achieve the above-mentioned purpose, the utility model proposes a button structure, including a pressing piece and a pressing piece bracket. After the pressing piece and the pressing piece bracket are assembled, they can switch between a self-locking state and an unlocking state. In the unlocking state, the pressing piece can be pressed to contact or disconnect with the switch contacts for realizing switch control. In the self-locking state, the pressing operation cannot be performed.
[0005] The pressing piece includes a pressing portion, a contact protrusion and a sliding foot, and the pressing piece bracket includes a limiting channel, a first avoidance position and a second avoidance position. Under the drive of external force, the pressing piece moves along the limiting channel to an unlocking point or a self-locking point through the sliding foot to achieve switching between an unlocking state and a self-locking state.
[0006] The first avoidance position is used to avoid contact with the contact protrusion. When the pressing member moves along the limit channel to the unlocking point, the contact protrusion is opposite to the switch contact position, and the sliding foot moves to the second avoidance position, so that the sliding foot has space to fall when the pressing member performs a pressing operation, and can achieve contact or disconnection with the switch contact when the pressing member performs a pressing operation; when the pressing member moves along the limit channel to the self-locking point, the contact protrusion is offset from the switch contact position, and the sliding foot is separated from the second avoidance position and rests on the pressing member bracket, so that the pressing operation cannot be performed in the self-locking state. Among them, the self-locking point or the unlocking point is a virtual position point in the moving route of the pressing member along the limit channel. Those skilled in the art can set the moving route as needed, and even add new points in the moving route to meet the needs.
[0007] Preferably, the first avoidance position is centrally arranged on the pressing member bracket.
[0008] Preferably, the button structure includes an elastic arm structure, which is formed by the cooperation of a first elastic arm structure and a second elastic arm structure. The first elastic arm structure includes an elastic positioning portion, and the second elastic arm structure includes a self-locking position, a transitional middle position and an unlocking position. The transitional middle position is located between the self-locking position and the unlocking position. The first elastic arm structure or the second elastic arm structure is arranged on the pressing piece.
[0009] The self-locking position is the position where the pressing piece moves along the limiting channel to the self-locking point, and the unlocking position is the position where the pressing piece moves along the limiting channel to the unlocking point. When the pressing piece moves to the self-locking point or the unlocking point, the elastic positioning part moves relatively along the transition middle position to the self-locking position or the unlocking position.
[0010] When the elastic positioning portion moves to the transition middle position, the elastic positioning portion is in an elastically compressed state, and when the pressing piece moves to the self-locking point or the unlocking point, the elastic positioning portion is in a released state and matches the corresponding self-locking position or the unlocking position.
[0011] The elastic arm structure enhances the user's operational feel when switching between the unlocked state and the self-locked state, and helps to accurately position the pressing piece in the unlocked state and the self-locked state.
[0012] Further preferably, the first elastic arm structure also includes a yield hole arranged along the proximal end of the elastic positioning part. When the elastic positioning part is in an elastically compressed state, the yield hole is squeezed reversely to release part of the pressure and reduce the resistance to movement along the transition middle position, so that the elastic positioning part moves smoothly.
[0013] Further preferably, the elastic positioning portion is an arc-shaped convex portion, the self-locking position and the unlocking position are arc-shaped concave portions matching the elastic positioning portion, and the connection between the transitional middle position and the self-locking position or the unlocking position is an arc-shaped transition.
[0014] Preferably, the limiting channel is formed by limiting convex ribs arranged opposite to each other on both sides of the top surface of the pressing member bracket. After the pressing member and the pressing member bracket are assembled, the two relative limiting convex ribs limit the pressing member to move in the limiting channel.
[0015] Further preferably, the limiting convex rib reserves a gap-avoiding section to avoid the gap and make way for the elastic arm structure.
[0016] The utility model also provides a hair straightening comb, which uses a key structure as in any of the above schemes, and has the beneficial effects of the corresponding schemes, which will not be described one by one here. The hair straightening comb includes an upper shell and a circuit board, the upper shell includes a movable hole position of a pressing part, the circuit board is provided with a switch contact, and the pressing member bracket is fixedly installed on the circuit board. The movable hole position of the pressing part reserves a movable travel space when the pressing part moves along the limit channel, and after assembly, it is convenient for the user to press the pressing part and move the pressing part to switch the self-locking and unlocking states.
[0017] Preferably, the pressing member further comprises a bottom plate located at the bottom of the pressing portion, and the bottom plate is abutted between the upper shell and the pressing member bracket.
[0018] Further preferably, the length L of the bottom plate 底板 Longer than the length of the active hole of the pressing part / long axis L 孔 , or the width of the base plate W 底板 Wider than the width of the active hole of the pressing part / minor axis W 孔 , so that the pressing piece is not easy to escape from the movable hole of the pressing part, and the button is not easy to shake back and forth or left and right.
[0019] In a preferred embodiment, the pressing part is a circular button, the movable hole of the pressing part is an oblong hole, the bottom plate is rectangular, the contact protrusion is centrally arranged under the bottom plate, sliding feet are arranged at the four corners of the bottom plate, and the pressing piece bracket is provided with a second avoidance position corresponding to the sliding feet, and the first avoidance position is centrally arranged on the pressing piece bracket.
[0020] The button structure also includes an elastic arm structure, which is formed by the cooperation of a first elastic arm structure and a second elastic arm structure. The first elastic arm structure includes an elastic positioning portion and a yield hole, and the second elastic arm structure includes a self-locking position, a transitional middle position and an unlocking position. The transitional middle position is located between the self-locking position and the unlocking position. The first elastic arm structure is arranged on the pressing piece, and the second elastic arm structure is arranged on the upper shell.
[0021] The self-locking position is the position where the pressing piece moves along the limiting channel to the self-locking point, and the unlocking position is the position where the pressing piece moves along the limiting channel to the unlocking point. When the pressing piece moves to the self-locking point or the unlocking point, the elastic positioning part moves relatively along the transition middle position to the self-locking position or the unlocking position.
[0022] When the elastic positioning portion moves to the transition middle position, the elastic positioning portion is in an elastically compressed state, and when the pressing piece moves to the self-locking point or the unlocking point, the elastic positioning portion is in a released state and matches the corresponding self-locking position or the unlocking position.
[0023] Beneficial effects: Compared with the prior art, the present invention realizes switching between self-locking and unlocking states by cooperating with the pressing member and the pressing member bracket. In the unlocking state, the pressing member can be pressed to contact or disconnect with the switch contact that can realize switch control. In the self-locking state, the pressing operation cannot be performed. The elastic arm structure is further provided to enhance the hand feel. The present invention prevents accidental touches in the limited space of the fine key structure scene, improves safety, and solves the technical problem in the prior art that the fine key structure similar to the straight hair comb is easy to be opened by accident and has safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0025] Figure 1 It is a schematic diagram of the explosion structure and three-dimensional structure of the utility model;
[0026] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the utility model in the unlocked state;
[0027] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the utility model in the self-locking state;
[0028] Figure 4 It is a bottom-up three-dimensional structural schematic diagram of the pressing piece and the pressing piece bracket of the utility model;
[0029] Figure 5 It is a top view of the three-dimensional structure of the pressing piece and the pressing piece bracket of the utility model;
[0030] Figure 6 It is a front three-dimensional and exploded structural schematic diagram of the upper shell and the pressing piece of the hair straightening comb of the utility model;
[0031] Figure 7 It is a schematic diagram of the exploded structure of an embodiment of the hair straightening comb of the utility model;
[0032] Figure 8 It is a schematic diagram of the structure of the elastic arm structure and the enlarged part at A of the utility model;
[0033] Fig. 9 It is a schematic diagram of an embodiment of a hair straightening comb of the present utility model.
[0034] In the accompanying drawings: 1-button structure, 11-pressing piece, 111-pressing portion, 112-contact contact protrusion, 113-sliding foot, 114-bottom plate, 115-button, 12-pressing piece bracket, 121-limiting channel, 1211-limiting convex rib, 1212-avoiding section, 122-unlocking point, 123-self-locking point, 124-first avoiding position, 125-second avoiding position, 13-first elastic arm structure, 131-elastic positioning portion, 132-giving hole, 14-second elastic arm structure, 141-self-locking position, 142-transition middle position, 143-unlocking position, 2-straight hair comb, 21-circuit board, 211-switch contact, 22-upper shell, 221-active hole position of the pressing portion.
[0035] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0037] It should be noted that if a directional indication is involved in the embodiments of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0039] This application proposes a key structure 1, such as Figure 1 , Figure 2 and Figure 3As shown, it includes a pressing piece 11 and a pressing piece bracket 12. After the pressing piece 11 and the pressing piece bracket 12 are assembled, they can switch between a self-locking state and an unlocking state. In the unlocking state, the pressing piece 11 can be pressed to contact or disconnect with the switch contact 211 for realizing switch control. In the self-locking state, the pressing operation cannot be performed.
[0040] like Figure 3 and Figure 4 As shown, the pressing member 11 includes a pressing portion 111, a contact protrusion 112 and a sliding foot 113, and the pressing member bracket 12 includes a limiting channel 121, a first avoidance position 124 and a second avoidance position 125. Under the drive of external force, the pressing member 11 moves along the limiting channel 121 to the unlocking point 122 or the self-locking point 123 through the sliding foot 113 to achieve switching between the unlocking state and the self-locking state.
[0041] The first avoiding position 124 is used to avoid contact with the contact protrusion 112. When the pressing member 11 moves along the limiting channel 121 to the unlocking point 122, as shown in FIG. Figure 2 As shown, the contact protrusion 112 is opposite to the switch contact 211, and the sliding foot 113 moves to the second avoidance position 125, so that the sliding foot 113 has a falling space when the pressing member 11 performs a pressing operation, and the pressing member 11 can be in contact with or disconnected from the switch contact 211 when the pressing operation is performed; when the pressing member 11 moves along the limit channel 121 to the self-locking point 123, as shown in FIG. Figure 3 As shown, the contact protrusion 112 is staggered from the switch contact 211, and the sliding foot 113 is separated from the second avoidance position 125 and abuts against the pressing member bracket 12, so that the pressing operation cannot be performed in the self-locking state. Among them, the self-locking point 123 or the unlocking point 122 is a virtual position point in the moving route of the pressing member 11 along the limiting channel 121. Those skilled in the art can set the moving route as needed, and even add new points in the moving route to meet the needs.
[0042] In a specific embodiment, when the pressing member 11 moves along the limiting channel 121 to the self-locking point 123 , the sliding foot 113 is separated from the second avoiding position 125 and abuts against the top surface of the pressing member bracket 12 .
[0043] In a preferred embodiment, the first avoidance position 124 is centrally disposed on the pressing member bracket 12 .
[0044] In a preferred embodiment, Figure 8As shown, the button structure 1 is provided with an elastic arm structure to enhance the user's operating feel and precise positioning. The elastic arm structure is formed by the cooperation of a first elastic arm structure 13 and a second elastic arm structure 14. The first elastic arm structure 13 includes an elastic positioning portion 131, and the second elastic arm structure 14 includes a self-locking position 141, a transitional middle position 142 and an unlocking position 143. The transitional middle position 142 is located between the self-locking position 141 and the unlocking position 143. The first elastic arm structure 13 or the second elastic arm structure 14 is arranged on the pressing member 11.
[0045] The self-locking position 141 is the position where the pressing member 11 moves along the limiting channel 121 to the self-locking point 123, and the unlocking position 143 is the position where the pressing member 11 moves along the limiting channel 121 to the unlocking point 122. When the pressing member 11 moves to the self-locking point 123 or the unlocking point 122, the elastic positioning portion 131 moves relatively along the transition middle position 142 to the self-locking position 141 or the unlocking position 143.
[0046] When the elastic positioning portion 131 moves toward the transitional middle position 142 , the elastic positioning portion 131 is in an elastically compressed state; when the pressing member 11 moves to the self-locking point 123 or the unlocking point 122 , the elastic positioning portion 131 is in a released state and matches the corresponding self-locking position 141 or the unlocking position 143 .
[0047] Further preferably, Figure 8 As shown, the first elastic arm structure 13 also includes a clearance hole 132 arranged along the proximal end of the elastic positioning portion 131. When the elastic positioning portion 131 is in an elastically compressed state, the reverse squeezing of the clearance hole 132 releases part of the pressure and reduces the resistance to movement along the transition middle position 142, so that the elastic positioning portion 131 moves smoothly.
[0048] Further preferably, the elastic positioning portion 131 is an arc-shaped convex portion, the self-locking position 141 and the unlocking position 143 are arc-shaped concave portions matching the elastic positioning portion 131, and the connection between the transition middle position 142 and the self-locking position 141 or the unlocking position 143 is an arc-shaped transition.
[0049] In a preferred embodiment, Figure 3 and Figure 5 As shown, the limiting channel 121 is formed by limiting ribs 1211 arranged opposite to each other on the top surface of the pressing member bracket 12. After the pressing member 11 is assembled with the pressing member bracket 12, the two relative limiting ribs 1211 limit the pressing member 11 to move within the limiting channel 121. Further preferably, the limiting ribs 1211 reserve a gap-avoiding section 1212 to avoid the gap and give way to the elastic arm structure.
[0050] The present application also provides a hair straightening comb 2, which uses a key structure 1 as described in any of the above solutions, such as Figure 7 and Fig. 9 As shown, the hair straightening comb 2 includes an upper shell 22 and a circuit board 21. The upper shell 22 includes a pressing part movable hole 221. The circuit board 21 is provided with a switch contact 211. The pressing part bracket 12 is fixedly mounted on the circuit board. The pressing part movable hole reserves a movable travel space when the pressing part moves along the limit channel.
[0051] In a preferred embodiment, Figure 7 As shown, the pressing member 11 further includes a bottom plate 114 located at the bottom of the pressing portion 111, and the bottom plate 114 is abutted between the upper shell 22 and the pressing member bracket 12. Further preferably, as Figure 6 As shown, the length L of the bottom plate 22 底板 Longer than the length / long axis L of the active hole 221 of the pressing portion 孔 , or the width W of the bottom plate 114 底板 Wider than the width / minor axis W of the active hole 221 of the pressing portion 孔 , so that the pressing member 11 is not easy to escape from the pressing portion movable hole 221, and the button 115 is not easy to shake back and forth or left and right.
[0052] In a preferred embodiment, Figure 7 and Figure 8 As shown, the pressing part 111 is a circular button 115 (made of plastic), the movable hole 221 of the pressing part is an oblong hole, the bottom plate 114 is a rectangle, the contact protrusion 112 is centrally arranged under the bottom plate 114, and sliding feet are arranged at the four corners of the bottom plate 114. The pressing piece bracket 12 is provided with a second avoidance position 125 corresponding to the sliding foot 113, and the first avoidance position 124 is centrally arranged on the pressing piece bracket 12.
[0053] The button structure 1 also includes an elastic arm structure, which is formed by a first elastic arm structure 13 and a second elastic arm structure 14. The first elastic arm structure 13 includes an elastic positioning portion 131 and a clearance hole 132. The second elastic arm structure 14 includes a self-locking position 141, a transitional middle position 142 and an unlocking position 143. The transitional middle position 142 is located between the self-locking position 141 and the unlocking position 143. The first elastic arm structure 13 is arranged on the pressing member 11, and the second elastic arm structure 14 is arranged on the upper shell 22.
[0054] The self-locking position 141 is the position where the pressing member 11 moves along the limiting channel 121 to the self-locking point 123, and the unlocking position 143 is the position where the pressing member 11 moves along the limiting channel 121 to the unlocking point 122. When the pressing member 11 moves to the self-locking point 123 or the unlocking point 122, the elastic positioning portion 131 moves relatively along the transition middle position 142 to the self-locking position 141 or the unlocking position 143.
[0055] When the elastic positioning portion 131 moves toward the transitional middle position 142 , the elastic positioning portion 131 is in an elastically compressed state; when the pressing member 11 moves to the self-locking point 123 or the unlocking point 122 , the elastic positioning portion 131 is in a released state and matches the corresponding self-locking position 141 or the unlocking position 143 .
[0056] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A key structure, characterized in that: The invention comprises a pressing member (11) and a pressing member bracket (12); the pressing member (11) and the pressing member bracket (12) can be switched between a self-locking state and an unlocking state after being assembled; in the unlocking state, the pressing member (11) can be pressed to make contact with or disconnect from a switch contact (211) for realizing switch control; in the self-locking state, the pressing member cannot be pressed. The pressing member (11) comprises a pressing portion (111), a contact protrusion (112) and a sliding foot (113); the pressing member bracket (12) comprises a limiting channel (121), a first avoiding position (124) and a second avoiding position (125); under the driving force of an external force, the pressing member (11) moves along the limiting channel (121) to an unlocking point (122) or a self-locking point (123) through the sliding foot (113) to realize switching between an unlocking state and a self-locking state. The first avoidance position (124) is used to avoid contact with the contact protrusion (112); when the pressing member (11) moves along the limit channel (121) to the unlocking point (122), the contact protrusion (112) is positioned opposite to the switch contact (211), and the sliding foot (113) moves to the second avoidance position (125), so that the sliding foot (113) has space to fall when the pressing member (11) performs a pressing operation. The pressing member (11) can be in contact with or disconnected from the switch contact (211) when performing a pressing operation; when the pressing member (11) moves along the limiting channel (121) to the self-locking point (123), the contact protrusion (112) and the switch contact (211) are offset in position, and the sliding foot (113) is separated from the second avoidance position (125) and abuts against the pressing member bracket (12), so that a pressing operation cannot be performed in the self-locking state.
2. The key structure according to claim 1, characterized in that: The invention also comprises an elastic arm structure, wherein the elastic arm structure is formed by a first elastic arm structure (13) and a second elastic arm structure (14), wherein the first elastic arm structure (13) comprises an elastic positioning portion (131), and the second elastic arm structure (14) comprises a self-locking position (141), a transitional intermediate position (142) and an unlocking position (143), wherein the transitional intermediate position (142) is located between the self-locking position (141) and the unlocking position (143), and the first elastic arm structure (13) or the second elastic arm structure (14) is arranged on the pressing member (11). The self-locking position (141) is the position where the pressing member (11) moves along the limiting channel (121) to the self-locking point (123), and the unlocking position (143) is the position where the pressing member (11) moves along the limiting channel (121) to the unlocking point (122). When the pressing member (11) moves to the self-locking point (123) or the unlocking point (122), the elastic positioning portion (131) moves relatively along the transition intermediate position (142) to the self-locking position (141) or the unlocking position (143). When the elastic positioning portion (131) moves toward the transitional intermediate position (142), the elastic positioning portion (131) is in an elastically compressed state; when the pressing member (11) moves to the self-locking point (123) or the unlocking point (122), the elastic positioning portion (131) is in a released state and matches the corresponding self-locking position (141) or the unlocking position (143).
3. The key structure according to claim 2, characterized in that: The first elastic arm structure (13) further comprises a clearance hole (132) arranged along the proximal end of the elastic positioning portion (131); when the elastic positioning portion (131) is in an elastically compressed state, the clearance hole (132) is squeezed in the reverse direction to release part of the pressure and reduce the resistance to movement along the transitional intermediate position (142), so that the elastic positioning portion (131) moves smoothly.
4. The key structure according to claim 3, characterized in that: The elastic positioning portion (131) is an arc-shaped convex portion, the self-locking position (141) and the unlocking position (143) are arc-shaped concave portions matching the elastic positioning portion (131), and the connection between the transition intermediate position (142) and the self-locking position (141) or the unlocking position (143) is an arc-shaped transition.
5. The key structure according to claim 2, characterized in that: The limiting channel (121) is formed by limiting convex ribs (1211) arranged opposite to each other on both sides of the top surface of the pressing member bracket (12).
6. The key structure according to claim 5, characterized in that: The limiting convex rib (1211) reserves a gap-avoiding section (1212) for making way for the elastic arm structure.
7. A hair straightening comb, characterized in that: Using the key structure described in any one of claims 1 to 6, the hair straightening comb (2) comprises an upper shell (22) and a circuit board (21), the upper shell (22) comprises a movable hole (221) of a pressing portion, the circuit board (21) is provided with a switch contact (211), and the pressing member bracket (12) is fixedly mounted on the circuit board (21).
8. The hair straightening comb according to claim 7, characterized in that: The pressing member (11) further comprises a bottom plate (114) located at the bottom of the pressing portion (111), and the bottom plate (114) is abutted between the upper shell (22) and the pressing member bracket (12).
9. The hair straightening comb according to claim 8, characterized in that: The length L of the bottom plate (114) 底板 Longer than the length / long axis L of the movable hole (221) of the pressing portion 孔 , or the width W of the bottom plate (114) 底板 Wider than the width / minor axis W of the movable hole (221) of the pressing portion 孔 .
10. The hair straightening comb according to claim 8 or 9, characterized in that: The pressing portion (111) is a circular button (115), the pressing portion movable hole (221) is an oblong hole, the bottom plate (114) is rectangular, the contact protrusion (112) is centrally arranged under the bottom plate (114), sliding feet (113) are arranged at the four corners of the bottom plate (114), the pressing member bracket (12) is correspondingly arranged with the second avoidance position (125) corresponding to the sliding foot (113), and the first avoidance position (124) is centrally arranged on the pressing member bracket (12), The key structure (1) also includes an elastic arm structure, which is formed by a first elastic arm structure (13) and a second elastic arm structure (14), wherein the first elastic arm structure (13) includes an elastic positioning portion (131) and a clearance hole (132), and the second elastic arm structure (14) includes a self-locking position (141), a transitional middle position (142) and an unlocking position (143), wherein the transitional middle position (142) is located between the self-locking position (141) and the unlocking position (143), the first elastic arm structure (13) is arranged on the pressing member (11), and the second elastic arm structure (14) is arranged on the upper shell (22). The self-locking position (141) is the position where the pressing member (11) moves along the limiting channel (121) to the self-locking point (123), and the unlocking position (143) is the position where the pressing member (11) moves along the limiting channel (121) to the unlocking point (122). When the pressing member (11) moves to the self-locking point (123) or the unlocking point (122), the elastic positioning portion (131) moves relatively along the transition intermediate position (142) to the self-locking position (141) or the unlocking position (143). When the elastic positioning portion (131) moves toward the transitional intermediate position (142), the elastic positioning portion (131) is in an elastically compressed state; when the pressing member (11) moves to the self-locking point (123) or the unlocking point (122), the elastic positioning portion (131) is in a released state and matches the corresponding self-locking position (141) or the unlocking position (143).