Button head of pressing type self-locking button

Abstract

The invention relates to the technical field of pressing type self-locking buttons, in particular to a button head of a pressing type self-locking button. The button head mainly comprises a shell, a push rod, a reset spring and a self-locking wheel. The push rod is contained in the shell, one end of the push rod is a pressing end, and the other end is a driving end and provided with a first cavity. The reset spring is sleeved outside the push rod to provide reset force. And the self-locking wheel is meshed with the driving end of the push rod to realize self-locking and unlocking functions. The first inverted buckle in the first cavity of the push rod is changed from a whole ring structure to a plurality of first sub inverted buckles which are arranged at intervals along the circumference. Through the improvement, when the push rod is subjected to injection molding, the mold can be demolded from the driving end, so that the first sealing plate can be integrally formed on one side, close to the pressing end, of the first cavity, and the interior of the cavity is effectively sealed. Compared with an existing waterproof scheme by adding an independent sealing piece, the integrally-formed sealing plate has the advantages of being simple in structure and convenient to assemble while the waterproof performance and reliability are remarkably improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of push-type self-locking buttons, and particularly relates to a knob head of a push-type self-locking button. BACKGROUND

[0002] The push-type self-locking button is a physical switch with a state memory function, which controls the on-off of a circuit through a cycle of clicking-locking-clicking-unlocking, and is widely applied to the fields of power control, mode switching and safety emergency stop.

[0003] The push-type self-locking button mainly comprises a knob head and a contact module, wherein the knob head is an operation structure of the push-type self-locking button, and is used for receiving an external pressing signal and acting on the contact module. The contact module is equivalent to a switch, and can be disconnected or connected to a circuit under the driving action of the knob head.

[0004] In the prior art, the knob head comprises a push rod and a self-locking wheel pushed by the push rod, the push rod is a hollow structure and has no waterproof performance, if waterproof performance is required, a sealing ring needs to be additionally designed, and the waterproof performance of the sealing ring will decrease with the increase of time, the change of temperature and the change of oil pollution environment. Moreover, the first undercut provided at the inner wall of the end of the push rod close to the self-locking wheel is a circumferentially complete undercut, and the ejection direction of the undercut can only be from the other end, which will affect the waterproof performance, a waterproof structure needs to be separately designed, and the leakage risk and assembly difficulty are increased. SUMMARY

[0005] The application provides a knob head of a push-type self-locking button, which can solve the technical problems of poor waterproof performance, complex structure and inconvenient assembly of the knob head of the push-type self-locking button.

[0006] The technical solution of the application is as follows: The knob head of the push-type self-locking button provided by the application comprises an outer shell, a push rod, a reset spring and a self-locking wheel. In the first direction, the outer shell has a hollow tubular structure and has a first port and a second port arranged oppositely.

[0007] The push rod, the reset spring and the self-locking wheel are all accommodated in the outer shell, wherein the push rod is arranged adjacent to the first port, and the self-locking wheel is arranged adjacent to the second port.

[0008] The reset spring is sleeved outside the push rod and located between the push rod and the outer shell. One end of the reset spring is abutted against a stopper arranged on the outer periphery of the push rod, and the other end of the reset spring is abutted against a boss on the inner wall of the outer shell.

[0009] One end of the push rod close to the first port is a pressing end for receiving an external pressing operation. The other end of the push rod close to the second port is a driving end for driving the self-locking wheel.

[0010] The push rod is also provided with a first cavity in the first direction, the first cavity is open at the driving end, and a first sealing plate for shielding the internal space of the first cavity is integrally arranged on one side of the first cavity close to the pressing end. A first undercut is arranged on the inner wall of the first cavity close to the driving end, and the first undercut comprises a plurality of first sub-undercuts arranged at intervals in a circle.

[0011] The push rod, the return spring, the self-locking wheel and the shell can form a self-locking and unlocking structure. The self-locking wheel is also provided with a second undercut extending into the first cavity at one end close to the push rod, and the second undercut is located on one side of the first undercut close to the first port, and the two can be overlapped.

[0012] Based on the button head of the pressing type self-locking button provided in the present application, by modifying the first undercut from one undercut arranged in a whole circle to a plurality of first sub-undercuts arranged in a circle, the mold core can be demolded from the driving end when the push rod is injection molded. Thus, the first sealing plate for shielding the internal space of the first cavity can be integrally arranged on one side of the first cavity close to the pressing end, so as to improve the waterproof performance of the button head of the pressing type self-locking button. Compared with the technical solution of increasing the sealing performance by increasing the sealing component in the prior art, the first sealing plate of the present application is integrally formed with the push rod, has good waterproof performance, high reliability, simple structure, convenient assembly and other remarkable effects.

[0013] In a possible design, the end of the driving end is provided with a plurality of first helical teeth. The self-locking wheel comprises an inner ring and an outer ring arranged coaxially, and the outer ring is connected to the outer side of the inner ring. At one end of the self-locking wheel close to the push rod, the inner ring protrudes out of the outer ring, and the protruding part is provided with a second undercut. In the first direction, the outer ring is located outside the first cavity, and a plurality of second helical teeth are arranged at intervals at one end of the outer ring close to the push rod, which can be matched and engaged with the first helical teeth on the push rod.

[0014] A plurality of lock blocks are arranged at intervals in the circumferential direction on the inner wall of the shell close to the second port, and a slide is formed between adjacent lock blocks.

[0015] The outer side of the push rod is provided with a plurality of first slide rails matched with the plurality of slides. In the radial direction of the outer ring, the part where the plurality of second helical teeth are arranged on the outer ring extends outward to form a plurality of second slide rails matched with the plurality of slides.

[0016] The first helical teeth, the second helical teeth, the lock blocks, the slides, the first slide rails, the second slide rails and the return spring jointly constitute a linkage structure for realizing the self-locking and unlocking actions.

[0017] A stop ring is further arranged at one end of the outer ring away from the push rod, the stop ring is located at the end of the second slide rail and on the side of the lock block away from the first port, and can abut against the lock block to limit the axial displacement of the self-locking wheel.

[0018] Based on the push type self-locking button provided by the embodiment, in the initial state (unlocked state), the push rod and the self-locking wheel are stably locked in the axial direction by the cooperation of the reset spring, the first reverse buckle, the second reverse buckle and the locking block on the shell. And the cooperation of the first slide rail of the push rod, the second slide rail of the self-locking wheel and the slide on the inner side of the shell realizes the stability in the circumferential direction. In the locked state, the push rod and the self-locking wheel are stably locked in the axial direction by the cooperation of the reset spring, the first reverse buckle, the second reverse buckle and the locking block on the shell. And the cooperation of the second helical tooth and the locking block realizes the stability in the circumferential direction. Furthermore, the knob head can keep stable in each state, and the reliability of anti-impact and anti-vibration is extremely high. In addition, the action of the knob head of the push type self-locking button provided by the embodiment strictly follows the sequence of "axial movement - overtravel - rotation - locking - re-rotation - unlocking". The end of the locking block away from the first port is a mechanical switch for triggering rotation, which ensures that the action only occurs at the preset end of the stroke, and eliminates the uncertainty of the intermediate state. Again, the second helical tooth in the present application has axial transmission function, circumferential rotation function and locking function, which greatly simplifies the structure of the knob head.

[0019] In a possible design, the end of the locking block away from the first port is provided with a locking groove matched with the second helical tooth, and the locking groove is further provided with a locking part on one side in the rotation direction of the self-locking wheel.

[0020] Based on the push type self-locking button provided by the embodiment, after the first press, the second helical tooth can slide into the locking groove under the action of the circumferential force, so that a stable locked state can be maintained.

[0021] In a possible design, the inner ring further comprises a plurality of circumferentially arranged segmentation grooves, which extend from the end of the inner ring close to the push rod to the other end. The segmentation grooves divide the second reverse buckle into a plurality of second sub-buckles arranged in the circumferential direction.

[0022] The outer periphery of the end of the inner ring away from the push rod is provided with a plurality of connecting parts, and the connecting parts are connected with the inner wall of the outer ring. In the axial direction of the inner ring, the shape of the connecting part is suitable for axial demolding.

[0023] In the circumferential direction, the plurality of connecting parts correspond to the plurality of segmentation grooves one by one, and in the first direction, the connecting part is arranged on the side of the segmentation groove away from the push rod.

[0024] Based on the push type self-locking button provided by the embodiment, the second reverse buckle is divided into a plurality of second sub-buckles arranged in the circumferential direction by the segmentation groove. In the circumferential direction, the plurality of connecting parts correspond to the plurality of segmentation grooves one by one, and in the first direction, the connecting part is arranged on the side of the segmentation groove away from the push rod. In this way, in the axial direction of the self-locking wheel, the projection of the second reverse buckle and the connecting part will not overlap. Then, the self-locking wheel can be demolded in the axial direction when it is made, which reduces the difficulty of making the self-locking wheel.

[0025] In a possible design, along the first direction, the shell comprises a first mounting section and a second mounting section, an inner diameter of the first mounting section is greater than an inner diameter of the second mounting section, and a stepped positioning surface is formed between the first mounting section and the second mounting section.

[0026] The pressing end is provided with a first positioning part matched with the stepped positioning surface, the first positioning part is matched with the stepped positioning surface, and is used for limiting the stroke of the push rod.

[0027] Based on the knob of the push-type self-locking button provided in this embodiment, when the knob is operated, the stepped positioning surface limits the pressing depth of the push rod, which can prevent over-pressing and damage to the contact module, and can also prevent insufficient pressing and failure to switch the state of the contact module.

[0028] In a possible design, a sealing ring is arranged between the outer periphery of the part of the push rod in the second mounting section and the shell.

[0029] Based on the knob of the push-type self-locking button provided in this embodiment, when external liquid enters from the gap between the push rod and the first mounting section, the liquid is blocked by the sealing ring and cannot further flow into the internal space, thereby preventing the internal structure and function of the button from being affected.

[0030] In a possible design, the first sealing plate is further provided with a second cavity opening to the pressing end on the side away from the driving end. The knob further comprises a light uniformizing sheet, and the light uniformizing sheet is arranged at the end of the second cavity and can cover the second cavity.

[0031] Based on the knob of the push-type self-locking button provided in this embodiment, the indicator light on the contact module is generally an LED light, and the LED light is a point light source. Direct light emission can cause local over-brightness and surrounding dimness. The light uniformizing sheet can scatter and mix the light of the point light source, and convert the light into uniform surface light, so that the light emission effect of the button surface is more consistent and beautiful.

[0032] In a possible design, the knob further comprises a key capable of transmitting light, and the key comprises a first component and a second component.

[0033] The first component is matched with the shape of the pressing end and is located on the side of the light uniformizing sheet away from the driving end. The second component is a flange extending toward the driving end relative to the first component and is located between the push rod and the shell.

[0034] Based on the knob of the push-type self-locking button provided in this embodiment, the key can isolate dust and water vapor from entering the inside of the push rod to a certain extent, and can enhance the waterproof performance between the shell and the push rod in cooperation with the sealing ring, and protect the internal light uniformizing sheet from being directly damaged by external force.

[0035] In a possible design, the first sealing plate is an arc-shaped plate protruding towards the pressing end, and the light is transmitted.

[0036] Based on the knob of the push-type self-locking button provided in this embodiment, when the indicator light at the first cavity emits light, the arc-shaped first sealing plate can more uniformly reflect and transmit light, reducing the loss of light in the first cavity, improving the brightness uniformity of the indicator light, and enabling the light of the indicator light to be better transmitted to the outside of the knob, so that the lighting effect is clearer and more visible.

[0037] In a possible design, the circumferential cavity wall of the push rod at the second cavity is tapered, and the radial size of the second cavity gradually expands from the first sealing plate to the pressing end.

[0038] Based on the knob of the push-type self-locking button provided in this embodiment, the light emitted by the indicator light naturally spreads along the inner wall of the second cavity to the direction of the light uniforming sheet, to complete preliminary light mixing. When the light reaches the light uniforming sheet, the coverage is more uniform, which can assist the light uniforming sheet to convert the point light source of the indicator light into a softer surface light, avoid local over-brightness and dark spots, and improve the consistency of the light emitted by the button. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 FIG. 1 is an appearance diagram of a push-type self-locking button.

[0040] Figure 2 FIG. 2 is a schematic diagram of the appearance structure of a knob of the push-type self-locking button provided in this embodiment.

[0041] Figure 3 FIG. 3 is a schematic diagram of the internal structure of the knob. Figure 2

[0042] Figure 4 FIG. 4 is a schematic diagram of the structure of a push rod.

[0043] Figure 5 FIG. 5 is another schematic diagram of the structure of the push rod.

[0044] Figure 6 FIG. 6 is a schematic diagram of the structure of a self-locking wheel.

[0045] Figure 7 FIG. 7 is a schematic diagram of the cross-sectional structure of a housing.

[0046] Figure 8 FIG. 8 is a state diagram of the knob after being pressed to the first position.

[0047] Figure 9 FIG. 9 is a schematic diagram of the structure of the knob in the locked state.

[0048] Figure 10 ​Figure 3 is a view of the button head in a state after the second pressing into place.

[0049] Wherein the reference signs are: A, button head; B, contact module; 1, housing; 11, boss; 12, locking block; 121, locking groove; 122, locking portion; 13, slide; 14, first mounting section; 15, second mounting section; 16, stepped positioning surface; 2, push rod; 21, pressing end; 211, first positioning portion; 22, driving end; 221, first helical tooth; 23, first cavity; 24, first sealing plate; 25, second cavity; 26, light uniforming sheet; 27, first undercut; 271, first sub-undercut; 28, stop block; 29, first slide rail; 3, reset spring; 4, self-locking wheel; 41, inner ring; 411, split groove; 412, second undercut; 4121, second sub-undercut; 413, connecting portion; 42, outer ring; 421, second helical tooth; 422, second slide rail; 423, stop ring; 5, button; 51, first component; 52, second component; 6, sealing ring. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "including," "comprising," or "having" and variations thereof in the specification and claims of this application is intended to cover both the inclusive and exclusive cases.

[0052] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. Those skilled in the art will appreciate that embodiments described herein can be combined with other embodiments.

[0053] In addition, the terms "first", "second", and the like in the description and claims of the present application or the above drawings are used to distinguish different objects, and are not used to describe a particular order, and can explicitly or implicitly include one or more of the features.

[0054] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more (including two).

[0055] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, the "connecting" or "connecting" of the mechanical structure can mean a physical connection, for example, the physical connection can be a fixed connection, for example, a fixed connection through a spacer, for example, a fixed connection through a screw, bolt or other spacer. The physical connection can also be a detachable connection, for example, a mutual clamping or clamping connection. The physical connection can also be integrally connected, for example, welding, bonding or integrally formed connection for connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0056] The present application will be described in detail below in combination with the drawings.

[0057] Figure 1 For the shape of a push type self-locking button, please refer to Figure 1 The push type self-locking button mainly includes two parts of knob head A and contact module B, wherein the knob head A is the operating structure of the push type self-locking button, used for receiving external pressing signals and acting on the contact module B. The contact module B is equivalent to a switch, which can be disconnected or connected to the circuit under the driving action of the knob head A.

[0058] Figure 2 As shown in the schematic diagram of the external structure of the knob head A of the push type self-locking button provided by the embodiment of the present application, Figure 3 As shown in the schematic diagram of the external structure of the knob head A of the push type self-locking button provided by the embodiment of the present application, Figure 2 As shown in the internal structure cross-sectional view of the knob head A, Figure 4 As shown in the schematic diagram of the structure of a push rod provided by the embodiment of the present application, Figure 5 As shown in another schematic diagram of the structure of a push rod.

[0059] Please refer to Figures 2 to 5 The knob head A of the push type self-locking button provided by the present application includes a shell 1, a push rod 2, a reset spring 3 and a self-locking wheel 4. In the first direction, the shell 1 is in a hollow tubular structure, having a first port and a second port arranged oppositely.

[0060] The push rod 2, the reset spring 3 and the self-locking wheel 4 are all contained in the shell 1, wherein the push rod 2 is arranged adjacent to the first port, and the self-locking wheel 4 is arranged adjacent to the second port.

[0061] The reset spring 3 is sleeved outside the push rod 2 and located between the push rod 2 and the shell 1. One end of the reset spring 3 is abutted against the stop block 28 arranged on the outer periphery of the push rod 2, and the other end is abutted against the boss 11 on the inner wall of the shell 1.

[0062] The push rod 2 is provided with a pressing end 21 close to the first port, which is used for receiving external pressing operation. The push rod 2 is provided with a driving end 22 close to the second port, which is used for driving the self-locking wheel 4.

[0063] In the first direction, the push rod 2 is provided with a first cavity 23, which is open at the driving end 22. The first cavity 23 is provided with a first sealing plate 24 close to the pressing end 21, which is used for shielding the internal space of the first cavity 23. The inner wall of the first cavity 23 close to the driving end 22 is provided with a first undercut 27, which comprises a plurality of first sub-undercuts 271 arranged at intervals in the circumference.

[0064] The push rod 2, the reset spring 3, the self-locking wheel 4 and the shell 1 can form a self-locking and unlocking structure. The self-locking wheel 4 is further provided with a second undercut 412 extending into the first cavity 23, and the second undercut 412 is located on the side of the first undercut 27 close to the first port, and the two can be overlapped with each other.

[0065] Specifically, the button head A of the pressing type self-locking button, the self-locking and unlocking structure formed between the push rod 2, the reset spring 3, the self-locking wheel 4 and the shell 1, and the principle of the pressing type ball pen are similar.

[0066] The working process is as follows: Initial state: The push rod 2 is arranged close to the first port, the self-locking wheel 4 is arranged close to the second port, and the self-locking wheel 4 has a certain distance from the push rod 2. The reset spring 3 is in a first compressed state, the first undercut 27 is overlapped with the second undercut 412 under the action of the reset spring 3, so that the positions of the push rod 2 and the self-locking wheel 4 in the first direction are relatively stable.

[0067] First pressing: Under the action of the pressing force, the push rod 2 overcomes the elastic force of the reset spring 3 and moves towards the second port, and contacts the self-locking wheel 4 to drive the self-locking wheel 4 to move towards the second port. The first undercut 27 is separated from the second undercut 412, and when the self-locking wheel 4 moves to a certain position, it rotates to lock through the self-locking and unlocking structure. At the same time, the pressing force disappears, the push rod 2 moves reversely until the first undercut 27 is overlapped with the second undercut 412 again.

[0068] Second pressing: Under the action of the pressing force, the push rod 2 overcomes the elastic force of the reset spring 3 again, moves towards the second port, and is in contact with the self-locking wheel 4, pushes the self-locking wheel 4 to move again, the first reverse buckle 27 is separated from the second reverse buckle 412, when the self-locking wheel 4 moves to a certain position, the self-locking wheel 4 is unlocked through the self-locking unlocking structure, after being unlocked, the self-locking wheel 4 rotates again, at the same time, the pressing force disappears, the push rod 2 reversely moves under the action of the reset spring 3, the first reverse buckle 27 re-engages with the second reverse buckle 412, so as to drive the self-locking wheel 4 to return to the initial state.

[0069] From the above process, it can be seen that, in the working process of the press-type self-locking button, the cooperation of the first reverse buckle 27 and the second reverse buckle 412 mainly serves to keep the position stability of the push rod 2 and the self-locking wheel 4 in the initial state and the self-locking state of the knob head A. In the reset process, the safety engagement can be always kept to ensure the accurate reset of the knob head A.

[0070] Please continue to refer to Figure 3 In the prior art, the push rod 2 of the knob head A of the press-type self-locking button is a hollow structure, which penetrates from the pressing end 21 to the driving end 22, so that the waterproof performance of the knob head A is poor, water can easily enter the inside of the push rod 2, thereby affecting the waterproof performance of the press-type self-locking button.

[0071] In the prior art, the first reverse buckle 27 provided on the inner wall of the push rod 2 close to the driving end 22 is a complete circumferential reverse buckle, so that, when the push rod 2 is manufactured, the push rod is blocked by the first reverse buckle 27, and the mold can be demolded from the pressing end during injection molding, so that the pressing end 21 of the push rod 2 is also open. Therefore, the waterproof performance of the knob head A is also affected.

[0072] Please continue to refer to Figure 3 Compared with the prior art, the knob head A of the press-type self-locking button provided by the present application is provided with a first cavity 23 in the push rod 2 along the first direction, the first cavity 23 is open at the driving end 22, a first sealing plate 24 for shielding the internal space of the first cavity 23 is arranged on the side of the first cavity 23 close to the pressing end 21, and a plurality of first reverse buckles 27 are circumferentially and interval ly arranged on the inner wall of the first cavity 23 close to the driving end 22. The first sealing plate 24 can play a waterproof role, if water enters the push rod 2, it will stay at the first sealing plate 24 and will not enter the first cavity 23, thereby affecting the components in the first cavity 23.

[0073] In addition, please refer to Figure 3 , Figure 4 and Figure 5In this application, the first undercut 27 provided on the inner wall of the first cavity 23 near the drive end 22 consists of multiple first sub-undercuts 271 spaced circumferentially, so that a demolding gap can be formed between two adjacent first sub-undercuts 271. When manufacturing the push rod 2, the mold core at the first cavity 23 can be a split mold core, that is, the mold core between two adjacent first sub-undercuts 271 is separate from the mold core at the first sub-undercut 271. During demolding, from the drive end 22, the mold core between the two first sub-undercuts 271 is first removed, and then the mold core at the first sub-undercut 271 is moved between the two first sub-undercuts 271, and demolded through the gap between the two first sub-undercuts 271.

[0074] As can be seen from the above, in this application, by modifying the first undercut 27 from a single undercut arranged around the entire circle to multiple first sub-undercuts 271 arranged circumferentially, the mold core can exit from the drive end 22 during injection molding of the push rod 2. This allows for the placement of a first sealing plate 24 on the side of the first cavity 23 near the pressing end 21 to shield the internal space of the first cavity 23, thereby improving the waterproof performance of the button A of the push-type self-locking button. Compared with existing technologies that increase sealing performance by adding sealing components, the first sealing plate 24 of this application is integrally formed with the push rod 2, resulting in significant advantages such as good waterproof performance, high reliability, simple structure, and convenient assembly.

[0075] Figure 6 This is a schematic diagram of the structure of a self-locking wheel 4 provided in an embodiment of this application. Figure 7 This is a cross-sectional structural diagram of a shell 1 provided in an embodiment of this application. Please refer to... Figures 3 to 7 In one embodiment of this application, the end of the drive end 22 is provided with a plurality of first helical teeth 221.

[0076] The self-locking wheel 4 includes an inner ring 41 and an outer ring 42 arranged coaxially, with the outer ring 42 connected to the outside of the inner ring 41. At one end of the self-locking wheel 4 near the push rod 2, the inner ring 41 extends beyond the outer ring 42, and the extended portion is provided with a second buckle 412.

[0077] Along the first direction, the outer ring 42 is located outside the first cavity 23. A plurality of second helical teeth 421 are arranged at intervals at one end of the outer ring 42 near the push rod 2. The second helical teeth 421 can be adapted to mesh with the first helical teeth 221 on the push rod 2.

[0078] On the inner wall of the outer casing 1 near the second port, a plurality of locking blocks 12 are provided at circumferential intervals, and a slide 13 is formed between adjacent locking blocks 12.

[0079] The outer side of the push rod 2 is provided with a plurality of first slide rails 29 that are adapted to the plurality of slide rails 13. Along the radial direction of the outer ring 42, the portion of the outer ring 42 where a plurality of second helical teeth 421 are provided extends outward to form a plurality of second slide rails 422 that are adapted to the plurality of slide rails 13.

[0080] The first helical tooth 221, the second helical tooth 421, the locking block 12, the slide rail 13, the first slide rail 29, the second slide rail 422, and the return spring 3 together constitute a linkage structure for realizing the self-locking and unlocking actions.

[0081] A retaining ring 423 is provided at the end of the outer ring 42 away from the push rod 2. The retaining ring 423 is located at the end of the second slide rail 422 and on the side of the locking block 12 away from the first port. It can abut against the locking block 12 to limit the axial displacement of the self-locking wheel 4.

[0082] Specifically, the principle and working process of the self-locking push button provided by this embodiment are as follows: Initial position: Please combine Figures 3 to 7 The self-locking wheel 4 is positioned near the second port. The retaining ring 423 at the end of the self-locking wheel 4 abuts against the locking block 12 on the outer casing 1 on the side away from the first port, restricting its axial movement. The second slide rail 422 of the self-locking wheel 4 is aligned with the slide rail 13 of the outer casing 1. The push rod 2 is positioned near the first port. The first slide rail 29 of the push rod 2 is aligned with the slide rail 13 of the outer casing 1. The return spring 3 is in a compressed state. The first buckle 27 engages with the second buckle 412 under the action of the return spring 3, thereby stabilizing the positions of the push rod 2 and the self-locking wheel 4 in the first direction.

[0083] First press: Figure 8 This is a diagram showing the state of the button after it has been pressed into place for the first time. Please refer to it. Figures 3 to 8 Pressing push rod 2 compresses the return spring 3 and moves it toward the self-locking wheel 4. When the first helical tooth 221 of push rod 2 engages with the second helical tooth 421 of self-locking wheel 4, push rod 2 pushes self-locking wheel 4, forcing self-locking wheel 4 to move axially along slide 13 toward the second port. When self-locking wheel 4 moves to the end of slide 13 and passes the locking block 12, self-locking wheel 4 temporarily disengages from the constraint of slide 13.

[0084] Figure 9 This is a schematic diagram of the button in the locked state. Please refer to... Figures 3 to 9 Because the helical surface of the second helical tooth 421 has accumulated circumferential force, the self-locking wheel 4 rotates immediately after overtravel. During rotation, the second helical tooth 421 and the locking block 12 form a circumferential lock.

[0085] When the pressing force is released, the return spring 3 pushes the push rod 2 to move in the opposite direction. The self-locking wheel 4 is locked by the locking block 12 and cannot move. During the movement, the first buckle 27 of the push rod 2 will hook again with the second buckle 412 of the self-locking wheel 4 in a new relative position. The button enters a stable locked state.

[0086] Second press: Figure 10 This is a diagram showing the state of the button after it has been pressed to its final position on the second press. Please refer to it. Figures 3 to 10 Press the push rod 2 again, and the push rod 2 will transmit a greater axial thrust to the self-locking wheel 4 through another first helical tooth 221, pushing the self-locking wheel 4 to move towards the second port again until it completely passes over the locking block 12. After the overtravel, the self-locking wheel 4 rotates again, and its second slide rail 422 is aligned again with the slide rail 13 of the outer casing 1.

[0087] When the pressing force is released, the reset spring 3 pushes the push rod 2 to move in the opposite direction, and the first buckle 27 and the second buckle 412 re-hook. The push rod 2 drives the self-locking wheel 4 through the first buckle 27, causing it to slide back to the initial position along the slide rail 13.

[0088] As can be seen from the above, based on the push-type self-locking button provided in this embodiment, in the initial state (unlocked state), the push rod 2 and the self-locking wheel 4 achieve axial stability through the mutual cooperation of the return spring 3, the first buckle 27, the second buckle 412, and the locking block 12 on the outer shell 1. Furthermore, circumferential stability is achieved through the cooperation of the first slide rail 29 of the push rod 2, the second slide rail 422 of the self-locking wheel 4, and the slide rail 13 on the inner side of the outer shell 1. In the locked state, the push rod 2 and the self-locking wheel 4 achieve axial stability through the mutual cooperation of the return spring 3, the first buckle 27, the second buckle 412, and the locking block 12 on the outer shell 1. Circumferential stability is achieved through the cooperation of the second helical tooth 421 and the locking block 12. Therefore, the button A can remain stable in every state, exhibiting extremely high reliability in terms of impact and vibration resistance.

[0089] Furthermore, the button A of the push-button self-locking button provided in this embodiment strictly follows the sequence of "axial movement - overtravel - rotation - locking - re-rotation - unlocking". The end of the locking block 12 furthest from the first port is a mechanical switch that triggers rotation, ensuring that the action only occurs at the preset end of the travel, eliminating uncertainty in intermediate states.

[0090] Furthermore, the second helical tooth 421 in this application has not only axial transmission function, but also circumferential rotation function and locking function, which greatly simplifies the structure of the button A.

[0091] Please refer to Figure 4 and Figure 6It should be noted that in this application, the surface of the first helical tooth 221 facing the second helical tooth 421 is a helical surface, and the surface of the second helical tooth 421 facing the first helical tooth 221 is a helical surface that is adapted to the first helical tooth 221.

[0092] Please combine Figure 6 and Figure 7 The locking block 12 has a locking groove 121 that matches the second helical tooth 421 at one end away from the first port. Along the rotation direction of the self-locking wheel 4, a locking part 122 is also provided on one side of the locking groove 121.

[0093] Please combine Figure 3 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 In some embodiments of this application, the end of the locking block 12 away from the first port is provided with a locking groove 121 that is adapted to the second helical tooth 421. A locking part 122 is also provided on one side of the locking groove 121. In this way, after the first pressing is in place, the second helical tooth 421 can slide into the locking groove 121 under the action of circumferential force, thus maintaining a stable locking state.

[0094] It should be noted that in this embodiment, the second helical tooth 421 acts as a latch, and the locking groove 121 and locking part 122 provided on the locking block 12 act as a latch. Therefore, as an alternative to this embodiment, in some other embodiments of this application, the second helical tooth 421 and its additional structure can also act as a latch, and the end of the locking block 12 away from the first port can form a latch.

[0095] Please combine Figure 3 and Figure 6 In one embodiment of this application, the inner ring 41 further includes a plurality of circumferentially arranged dividing grooves 411, which extend from one end of the inner ring 41 near the push rod 2 toward the other end. The dividing grooves 411 divide the second buckle 412 into a plurality of second sub-buckles 4121 arranged along the circumferential direction.

[0096] The outer periphery of the inner ring 41 away from the push rod 2 is provided with a plurality of connecting parts 413, and the connecting parts 413 are connected to the inner wall of the outer ring 42. Along the axial direction of the inner ring 41, the shape of the connecting parts 413 is suitable for axial demolding.

[0097] Along the circumferential direction, multiple connecting parts 413 correspond one-to-one with multiple dividing grooves 411. Along the first direction, the connecting parts 413 are located on the side of the dividing groove 411 away from the push rod 2.

[0098] Specifically, the self-locking wheel 4 is mostly manufactured by injection molding. From the overall structure of the self-locking wheel 4, the self-locking wheel 4 includes an inner ring 41 and an outer ring 42 arranged coaxially. The inner ring 41 and the outer ring 42 are connected by a connecting part 413 to form an integral structure.

[0099] Please combine Figure 3 and Figure 6 In this application, the second undercut 412 needs to extend into the first cavity 23 and overlap with the first undercut 27. Therefore, the hook of the second undercut 412 needs to be turned outward relative to the inner hole of the inner ring 41 to achieve overlap with the first undercut 27. However, when the second undercut 412 is turned outward relative to the inner hole of the inner ring 41, it will undoubtedly cover the gap between the inner ring 41 and the outer ring 42. The connecting part 413 is located in the gap between the inner ring 41 and the outer ring 42. Thus, if the second undercut 412 is a continuous and complete undercut in the circumferential direction, the projections of the second undercut 412 and the connecting part 413 will overlap along the axial direction of the self-locking wheel 4. This increases the difficulty of axial demolding during the manufacturing of the self-locking wheel 4, thus increasing the manufacturing difficulty.

[0100] In this embodiment, the second buckle 412 is divided into multiple second sub-buckles 4121 arranged along the circumferential direction by the dividing groove 411. Along the circumferential direction, multiple connecting portions 413 correspond one-to-one with the multiple dividing grooves 411, and along the first direction, the connecting portions 413 are located on the side of the dividing groove 411 away from the push rod 2. Thus, along the axial direction of the self-locking wheel 4, the projections of the second buckles 412 and the connecting portions 413 will not overlap. Therefore, the self-locking wheel 4 can be demolded axially during manufacturing, reducing the manufacturing difficulty of the self-locking wheel 4.

[0101] Please combine Figure 5 and Figure 6 It should be noted that in this embodiment, the multiple second sub-locking buckles 4121 and the multiple first sub-locking buckles 271 need to have redundant overlap, so as to ensure that no matter how much the self-locking wheel 4 rotates relative to the push rod 2, the multiple second sub-locking buckles 4121 can reliably overlap with the multiple first sub-locking buckles 271.

[0102] It should also be noted that in other embodiments of this application, the second undercut 412 can also be designed as a full-circle undercut, but it has the characteristics of complex mold making and difficult demolding.

[0103] Please continue to refer to this. Figure 5 In some embodiments of this application, in order to facilitate the manufacture of the push rod 2, the central angle of the first sub-button 271 along the circumferential direction is smaller than the central angle of the gap between two adjacent first sub-buttons 271 along the circumferential direction, which facilitates the removal of the mold core.

[0104] Please combine Figure 3 ,Figure 5 and Figure 6 To ensure a reliable overlap between the second sub-clamp 4121 and the first sub-clamp 271, the central angle of the second sub-clamp 4121 along the circumferential direction is greater than the central angle of the gap between two adjacent second sub-clamps 4121 along the circumferential direction. For example, when the second sub-clamp 4121 overlaps with the first sub-clamp 271, the second sub-clamp 4121 simultaneously spans two first sub-clamps 271.

[0105] Please combine Figure 3 and Figure 8 In some embodiments of this application, along a first direction, the outer casing 1 includes a first mounting section 14 and a second mounting section 15, the inner diameter of the first mounting section 14 is larger than the inner diameter of the second mounting section 15, and a stepped positioning surface 16 is formed between the first mounting section 14 and the second mounting section 15.

[0106] The pressing end 21 is provided with a first positioning part 211 that is adapted to the step positioning surface 16. The first positioning part 211 cooperates with the step positioning surface 16 to limit the stroke of the push rod 2.

[0107] Specifically, in this embodiment, a stepped positioning surface 16 is formed between the first mounting section 14 and the second mounting section 15, and the pressing end 21 is provided with a first positioning part 211 that is adapted to the stepped positioning surface 16. In this way, when the button A is pressed, the stepped positioning surface 16 limits the pressing depth of the push rod 2, which can prevent excessive pressing and damage to the contact module, and at the same time, it can also avoid insufficient pressing and failure to switch the state of the contact module.

[0108] Please continue to refer to this. Figure 3 In one embodiment of this application, a sealing ring 6 is provided between the push rod 2 and the second mounting section 15.

[0109] In this way, when external liquid enters from the gap between the push rod 2 and the first mounting section 14, it is blocked by the sealing ring 6 and will not flow further into the internal space, thus preventing it from affecting the internal structure and function of the button.

[0110] Please continue to refer to this. Figure 3 As an example, the sealing ring 6 can be a Y-shaped sealing ring. The Y-shaped sealing ring achieves sealing by fitting the outer wall of the push rod 2 and the inner wall of the housing 1 with the lips on both sides. It has good lip flexibility, moderate frictional resistance, and can maintain the seal by following the reciprocating motion of the push rod 2. It is not easy to fail due to frequent movement.

[0111] In other embodiments of this application, the sealing ring 6 may also be a U-shaped sealing ring, an O-shaped sealing ring, or other types of sealing elements.

[0112] Please combine Figure 1 and Figure 3In one embodiment of this application, the button A of the push-button self-locking button is used to connect to the contact module B with an indicator light, which is used to display the on / off state of the contact module B. When the button A is connected to the contact module B, the contact module B is located below the button A, and the light-emitting element of the indicator light is located in the first cavity 23.

[0113] Therefore, in order to enable users to better observe the switching state of the contact module B from outside the button A, in some embodiments of this application, the first sealing plate 24 is further provided with a second cavity 25 opening into the pressing end 21 on the side away from the driving end 22. The button A also includes a light-diffusing plate 26, which is disposed at the end of the second cavity 25 and can cover the second cavity 25.

[0114] Specifically, the indicator lights on contact module B are generally LEDs. LEDs are point light sources, and direct light emission can result in localized overbrightness and surrounding darkness. The light diffuser 26 can scatter and mix the light from the point light source, converting it into uniform surface light, making the light emission effect on the button surface more consistent and aesthetically pleasing.

[0115] Please continue to refer to this. Figure 2 and Figure 3 The button A also includes a light-transmitting button 5, which includes a first component 51 and a second component 52.

[0116] The first component 51 is adapted to the shape of the pressing end 21 and is located on the side of the light-diffusing plate 26 away from the driving end 22. The second component 52 is located between the push rod 2 and the housing 1 and is a flange extending toward the driving end 22 relative to the first component 51.

[0117] In this embodiment, button 5, as the component directly contacted by the user, receives the pressing action and transmits the pressing force to the internal push rod 2, driving the subsequent self-locking wheel 4 to move, which is the starting point for triggering the button's on / off function. At the same time, button 5 serves as the button's status display window. Button 5 is typically made of a light-transmitting material (such as semi-transparent PC plastic), allowing the light from the indicator light inside the first cavity 23 to shine through, providing intuitive feedback to the user on the button's current status.

[0118] In this embodiment, the button 5 includes a first component 51 and a second component 52. The first component 51 is adapted to the shape of the pressing end 21 and is located on the side of the light-diffusing plate 26 away from the driving end 22. The second component 52 is located between the push rod 2 and the housing 1 and is a flange extending towards the driving end 22 relative to the first component 51. In this way, the button 5 can isolate dust and moisture from entering the push rod 2 to a certain extent, and together with the sealing ring 6, enhance the waterproof performance between the housing 1 and the push rod 2, while protecting the internal light-diffusing plate 26 from direct damage by external forces.

[0119] Please combine Figure 1 andFigure 3 In order to enable users to better observe the switching state of the contact module B from the outside of the button A, in some embodiments of this application, the first sealing plate 24 is an arc-shaped plate protruding toward the pressing end 21 and is light-transmitting.

[0120] In this way, when the indicator light at the first cavity 23 is lit, the arc-shaped first sealing plate 24 can reflect and transmit light more evenly, reduce light loss in the first cavity 23, improve the brightness uniformity of the indicator light, and enable the light of the indicator light to be better transmitted to the outside of the button A, making the lighting effect clearer and more visible.

[0121] Please continue to refer to this. Figure 3 In one embodiment of this application, the push rod 2 has a tapered circumferential cavity wall in the second cavity 25, and the radial dimension of the second cavity 25 gradually expands from the first sealing plate 24 to the pressing end 21.

[0122] Specifically, when the circumferential cavity wall of the second cavity 25 is conical and gradually expands from the first sealing plate 24 to the pressing end 21, the light emitted by the indicator light will naturally diffuse along the inner wall of the second cavity 25 towards the light diffuser 26 to complete the initial light mixing. When the light reaches the light diffuser 26, the coverage is more uniform, which can help the light diffuser 26 convert the point light source of the indicator light into a softer surface light, avoid local overly bright dark spots, and improve the consistency of button illumination.

[0123] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0124] The above-described embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A button head for a push-button self-locking button, characterized in that, It includes a housing, a push rod, a return spring, and a self-locking wheel; along the first direction, the housing has a hollow tubular structure and has a first port and a second port arranged opposite to each other; The push rod, the return spring, and the self-locking wheel are all housed inside the housing, wherein the push rod is located near the first port and the self-locking wheel is located near the second port; The return spring is sleeved on the outside of the push rod and located between the push rod and the outer shell; one end of it abuts against the stop block provided on the outer periphery of the push rod, and the other end abuts against the boss on the inner wall of the outer shell. The end of the push rod near the first port is the pressing end, which is used to receive external pressing operations; the end of the push rod near the second port is the driving end, which is used to drive the self-locking wheel. Along the first direction, the push rod is also provided with a first cavity, the first cavity opening at the drive end, and a first sealing plate for shielding the internal space of the first cavity is integrally provided on the side of the first cavity near the pressing end. A first buckle is provided on the inner wall of the first cavity near the drive end, and the first buckle includes a plurality of first sub-buckles arranged circumferentially. The push rod, the return spring, the self-locking wheel, and the housing can form a self-locking and unlocking structure; the end of the self-locking wheel near the push rod is also provided with a second buckle that extends into the first cavity, and the second buckle is located on the side of the first buckle near the first port, and the two can overlap each other.

2. The button head of the push-button self-locking button according to claim 1, characterized in that, The end of the drive end is provided with a plurality of first helical teeth; The self-locking wheel includes an inner ring and an outer ring arranged coaxially, with the outer ring connected to the outside of the inner ring; at one end of the self-locking wheel near the push rod, the inner ring extends out of the outer ring, and the extended portion is provided with the second buckle; Along the first direction, the outer ring is located outside the first cavity, and a plurality of second helical teeth are arranged at intervals at one end of the outer ring near the push rod. The second helical teeth can be adapted to mesh with the first helical teeth on the push rod. On the inner wall of the outer casing near the second port, a plurality of locking blocks are provided at circumferential intervals, and a slide is formed between adjacent locking blocks; The outer side of the push rod is provided with a plurality of first slide rails that are adapted to the plurality of slide tracks; along the radial direction of the outer ring, the portion of the outer ring provided with a plurality of second helical teeth extends outward to form a plurality of second slide rails that are adapted to the plurality of slide tracks. The first helical tooth, the second helical tooth, the locking block, the slide rail, the first slide rail, the second slide rail, and the return spring together constitute a linkage structure for realizing the self-locking and unlocking actions; A retaining ring is provided at the end of the outer ring away from the push rod. The retaining ring is located at the end of the second slide rail and on the side of the locking block away from the first port. It can abut against the locking block to limit the axial displacement of the self-locking wheel.

3. The button head of the push-button self-locking button according to claim 2, characterized in that, The locking block has a locking groove at one end away from the first port that matches the second helical tooth, and a locking part is provided on one side of the locking groove along the rotation direction of the self-locking wheel.

4. The button head of the push-button self-locking button according to claim 2 or 3, characterized in that, The inner ring also includes a plurality of circumferentially arranged dividing grooves, which extend from one end of the inner ring near the push rod toward the other end; the dividing grooves divide the second buckle into a plurality of second sub-buckles arranged along the circumferential direction. The outer periphery of the inner ring away from the push rod is provided with a plurality of connecting parts, and the connecting parts are connected to the inner wall of the outer ring; along the axial direction of the inner ring, the second undercut does not overlap with the connecting parts in projection, and the shape of the connecting parts is suitable for axial demolding; Along the circumferential direction, a plurality of the connecting portions correspond one-to-one with a plurality of the dividing grooves. Along the first direction, the connecting portion is located on the side of the dividing groove away from the push rod.

5. The button head of the push-button self-locking button according to any one of claims 1 to 3, characterized in that, Along the first direction, the housing includes a first mounting section and a second mounting section, the inner diameter of the first mounting section is larger than the inner diameter of the second mounting section, and a stepped positioning surface is formed between the first mounting section and the second mounting section; The pressing end is provided with a first positioning part that is adapted to the step positioning surface. The first positioning part cooperates with the step positioning surface to limit the stroke of the push rod.

6. The button head of the push-button self-locking button according to claim 5, characterized in that, A sealing ring is provided between the outer periphery of the portion of the push rod located in the second mounting section and the outer casing.

7. The button head of the push-button self-locking button according to any one of claims 1 to 3, characterized in that, The first sealing plate is further provided with a second cavity opening into the pressing end on the side away from the driving end; The button also includes a light-diffusing plate, which is disposed at the end of the second cavity and can cover the second cavity.

8. The button head of the push-button self-locking button according to claim 7, characterized in that, The button also includes a light-transmitting button, which includes a first component and a second component; The first component is adapted to the shape of the pressing end and is located on the side of the light-diffusing plate away from the driving end; the second component is located between the push rod and the housing and is a flange extending toward the driving end relative to the first component.

9. The button head of the push-button self-locking button according to claim 7, characterized in that, The first sealing plate is an arc-shaped plate that protrudes toward the pressing end and is translucent.

10. The button head of the push-button self-locking button according to claim 7, characterized in that, The circumferential wall of the push rod in the second cavity is tapered, and the radial dimension of the second cavity gradually expands from the first sealing plate to the pressing end.

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