A hidden self-locking snap buckle structure

Abstract

The utility model discloses a hidden self -locking elastic lock catch structure, including the casing, the one side of casing is equipped with the limit shell, the inside slide of limit shell is equipped with the press head, the inside of casing is equipped with the limit frame, be equipped with the installation shell in the limit frame, the movable installation shell in is equipped with micro -spring, one side of micro -spring is equipped with the platform of force to self -locking switch, the inside of installation shell is slidably arranged to the platform of force to self -locking switch, and both sides of the platform of force to self -locking switch are equipped with the elastic plate symmetrically, and the other end of elastic plate is equipped with the lock catch and is connected, one side of press head is equipped with the barb and is connected, and both sides of press head are equipped with the limiting piece symmetrically, and the slide rail is seted up in the limit shell, and the limiting piece is slid in the inside of slide rail, the utility model discloses the whole size control of self -locking elastic lock catch is in 6mm, wherein the distance of press head rebound to initial position is about 5.8mm, and the installation space of small -size portable product is adapted, and the direction limit slide rail and stroke limiting structure are additionally provided, ensure that press head only moves along the axial movement, and the rebound distance is accurate, avoids the jam.

Description

Technical Field

[0001] This utility model relates to the field of miniaturized concealed self-locking spring lock technology, and more specifically, it relates to a concealed self-locking spring lock structure. Background Technology

[0002] In existing technologies, self-locking spring locks are widely used in various products that require rapid locking and unlocking. With the rapid development of portable electronic products and small precision devices, higher demands are placed on the miniaturization and concealed design of self-locking spring locks. The closest solution in existing technologies is the miniature self-locking spring lock, whose structure includes a pressing component and a locking component. The pressing component only contains a simple pressing head, and the locking component is a fixing part with a locking protrusion. By pressing the pressing head, the locking protrusion of the locking component is deformed. After releasing, the locking protrusion returns to its original position to achieve locking. When pressed again, the locking protrusion deforms again to unlock and rebounds under the action of a spring. However, the size of existing self-locking spring locks is still relatively large. The minimum size of traditional structures reaches 8mm to 12mm, which far exceeds the installation space requirements of small portable products such as earphone cases and smartwatch strap buckles. These products usually only reserve 5mm to 7mm of installation space. Traditional structures cannot be adapted to small products ≤6mm in size, making it impossible to integrate them into small products and limiting the application and promotion of self-locking spring locks in the field of small portable products.

[0003] Secondly, existing self-locking spring latches lack effective directional and travel limiting structures. During pressing, the pressing component is prone to deviating in a non-preset direction, frequently causing jamming and affecting product lifespan. At the same time, because the infinite sliding rail precisely controls the rebound distance, the rebound distance after pressing cannot be precisely limited. This may result in the pressing head still protruding from the shell surface after locking or failing to fully rebound after unlocking, compromising the concealed use effect, affecting the product's appearance and user feel. These problems are particularly prominent in small portable products, seriously impacting the overall performance and user experience. Utility Model Content

[0004] (a) Technical problems to be solved In view of the problems existing in the prior art, this utility model provides a hidden self-locking spring latch structure to solve the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a concealed self-locking spring latch structure, comprising a housing, characterized in that: a limiting shell is detachably provided on one side of the housing, a pressing head is slidably provided inside the limiting shell, a limiting frame is fixedly provided inside the housing, a mounting shell is detachably provided in the limiting frame, a micro spring is movably provided in the mounting shell, a force platform for applying a self-locking switch is provided on one side of the micro spring, the force platform for applying the self-locking switch is slidably provided inside the mounting shell, elastic plates are symmetrically connected on both sides of the force platform for applying the self-locking switch, a latch is connected to the other end of the elastic plate, a barb is connected to one side of the pressing head, the bottom length of the barb is less than or equal to 3mm, and the bottom width of the barb is less than or equal to 1.8mm, the diameter of the pressing head is less than or equal to 13.9mm, limiting members are symmetrically provided on both sides of the pressing head, a slide rail is provided in the limiting shell, and the limiting member is slidably located inside the slide rail.

[0006] The present invention is further configured such that the micro spring provides the rebound force for the pressing head, and the micro spring has a diameter of less than or equal to 1.5 mm and a length of less than or equal to 4 mm.

[0007] The present invention is further configured such that the pressing head is embedded in the slide rail with a defined direction and can slide along the slide rail axis, the barb is engaged with the latch, and the bottom of the barb is in contact with the force platform of the self-locking switch.

[0008] The present invention is further configured such that a connecting frame is movably provided inside the mounting housing, one end of the connecting frame is rotatably connected to the inner wall of the mounting housing, and the other end of the connecting frame is rotatably connected to the force platform for the self-locking switch.

[0009] The present invention is further configured such that the overall length is less than or equal to 6mm, and the distance from which the pressing component rebounds to the initial position is 5.8mm.

[0010] The present invention is further configured such that the body size of the self-locking switch is less than or equal to 2mm multiplied by 3mm.

[0011] The present invention is further configured such that the maximum distance limiting structure on the inner side of the slide rail is used to control the springback stroke of the pressing head, and the maximum distance limiting structure corresponds to a 1mm locking springback stroke and a 5.8mm unlocking springback stroke.

[0012] The present invention is further configured such that the slide rail limits the pressing head to move only along the axial direction, and the width of the slide rail is adapted to the limiting member with a gap of less than or equal to 0.1 mm.

[0013] (III) Beneficial Effects Compared with the prior art, this utility model provides a concealed self-locking spring latch structure, which has the following advantages: 1. By miniaturizing the pressing component to make the pressing head diameter less than or equal to 3mm and the overall length less than or equal to 6mm, and simultaneously compressing the size of the self-locking switch component to make the self-locking switch body size less than or equal to 2mm x 3mm, and using a miniature spring with a diameter less than or equal to 1.5mm and a length less than or equal to 4mm as the reset component, the overall structural size is controlled to less than or equal to 6mm. This achieves the miniaturization of the self-locking spring latch design. When operators integrate this self-locking spring latch into small portable products, the overall structural size of less than or equal to 6mm makes it perfectly compatible with small... The 5mm to 7mm installation space typically reserved for small portable products allows the self-locking spring clips to be directly embedded into the product housing without affecting the product's appearance and structural design. This effectively solves the problem that the minimum size of traditional self-locking spring clip structures is 8mm to 12mm, which is far beyond the installation space requirements of small portable products. This makes them unsuitable for integration into small products such as earphone cases, smartwatch strap buckles, etc., which limits the application and promotion of self-locking spring clips in the field of small portable products. It fills the market gap where traditional structures cannot be adapted to small products and expands the application range of self-locking spring clips.

[0014] 2. By setting the slide rail width to match the limiting component with a gap of less than or equal to 0.1mm, the limiting component is embedded in the slide rail and can only slide along the slide rail axis. Simultaneously, the slide rail's maximum distance limiting structure corresponds to a 1mm locking rebound stroke and a 5.8mm unlocking rebound stroke. The maximum distance limiting structure of the slide rail, in conjunction with the rebound force of the micro-spring, forms a dual precise control mechanism for the pressing head's movement direction and rebound stroke. During the pressing head's operation, the axial limitation effect of the slide rail's directional limiting part ensures that the pressing head can only move in the preset direction with a deviation rate of less than or equal to 1%, preventing the pressing head from deviating in a non-preset direction. At the same time, the maximum distance limiting structure of the slide rail precisely controls the pressing head's 1mm rebound in the locked state. In both locked and unlocked states, the springback mechanism rebounds 5.8mm to its initial position, ensuring that the barb is concealed within the limiting shell in both locked and unlocked states. This effectively solves the problem of existing self-locking spring latches lacking directional and travel limiting structures, which can cause the pressing component to easily deviate in a non-preset direction during pressing, frequently resulting in jamming and affecting product lifespan. Furthermore, because the infinite sliding rail cannot precisely control the rebound distance, the rebound distance after pressing cannot be precisely limited, which may lead to the barb still protruding from the shell surface after locking or failing to fully rebound after unlocking, thus compromising the concealed design and affecting the product's appearance and user experience. This mechanism reduces the jamming probability by more than 95%, extends the structural lifespan, maintains the product's appearance, and improves the user experience.

[0015] 3. By incorporating a barb in the pressing component to engage with the latch, and a force-applying platform in the self-locking switch component to ensure contact between the bottom of the barb and the platform, and a micro-spring providing rebound force to the pressing head, combined with a maximum distance limiting structure to restrict the rebound stroke, a convenient pressing-type locking and unlocking mechanism is formed. The entire operation requires only pressing, eliminating the need for manual prying or additional tools. Furthermore, since the pressing head is hidden inside the housing in both locked and unlocked states and does not protrude from the housing surface, the operation steps are effectively simplified and the product's appearance remains flat. Compared to traditional structures that require manual prying to unlock and may protrude from the housing after locking, the operation steps are reduced by 50%, improving user convenience and product aesthetics. This design is suitable for various small and portable product scenarios, such as earphone cases, smartwatch strap buckles, mini USB flash drive covers, and small medical device shells. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a concealed self-locking spring latch structure in this utility model; Figure 2 This is a cross-sectional view of the structure of this utility model; Figure 3 This is a schematic diagram of the structure of the present invention with the shell and mounting shell removed; Figure 4 This is a cross-sectional view of the present invention with the pressing head removed. Figure 5 This is a schematic diagram of the limiting shell part in this utility model.

[0017] In the diagram: 1. Housing; 2. Limiting housing; 3. Pressing head; 4. Limiting frame; 5. Mounting housing; 6. Miniature spring; 7. Force platform for self-locking switch; 8. Elastic plate; 9. Lock; 10. Barb; 11. Limiting component; 12. Slide rail; 13. Connecting frame. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0020] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0021] Please see Figures 1-5 A miniaturized concealed self-locking spring lock structure includes a housing 1, characterized in that: a limiting shell 2 is detachably provided on one side of the housing 1, a pressing head 3 is slidably provided inside the limiting shell 2, a limiting frame 4 is fixedly provided inside the housing 1, a mounting shell 5 is detachably provided in the limiting frame 4, a miniature spring 6 is movably provided in the mounting shell 5, a self-locking switch force platform 7 is provided on one side of the miniature spring 6, the self-locking switch force platform 7 is slidably provided inside the mounting shell 5, elastic plates 8 are symmetrically connected on both sides of the self-locking switch force platform 7, a lock 9 is connected to the other end of the elastic plate 8, a barb 10 is connected to one side of the pressing head 3, the bottom length of the barb 10 is less than or equal to 3mm, and the bottom width of the barb 10 is less than or equal to 1.8mm, the diameter of the pressing head 3 is less than or equal to 13.9mm, limiting members 11 are symmetrically provided on both sides of the pressing head 3, a slide rail 12 is provided in the limiting shell 2, and the limiting member 11 is slidably located inside the slide rail 12.

[0022] In this embodiment, the pressing head 3 is a cylindrical structure with a diameter of 13.9 mm. A barb 10 is located at the bottom of the pressing head 3 and is a hook-shaped structure for engaging with the latch 9. The length of the bottom end of the barb 10 is less than or equal to 3 mm, and the width of the bottom end of the barb 10 is less than or equal to 1.8 mm. The slide rail 12 includes a direction-limiting portion 14 and a maximum distance-limiting structure 15. The direction-limiting portion 14 of the slide rail 12 is a long, narrow groove with an inner diameter of 3.1 mm that matches the outer diameter of the pressing head 3 with a gap of 0.1 mm. When the pressing head 3 is in the initial position, the limit... The positioning element 11 abuts against the maximum distance limiting structure 15. When the pressing head 3 is in the locked position, the pressing head 3 moves downward and rebounds by 1mm. The maximum distance limiting structure 15 restricts it from moving upward. The main body of the latch 9 is a miniature switch structure with a size of 2mm x 3mm. The force platform 7 for the self-locking switch is a horizontally set support plate that contacts the bottom of the barb 10. The reset component is a miniature spring 6 with a diameter of 1.5mm and a length of 4mm. The pressing head 3 is used to receive external force. The barb 10 and the latch 9 cooperate to achieve the locking function.

[0023] Please see Figures 3-5 As a further implementation of the overall device: the miniature spring 6 provides the rebound force for the pressing head 3, and the diameter of the miniature spring 6 is less than or equal to 1.5 mm and the length is less than or equal to 4 mm.

[0024] The pressing head 3 is embedded in the direction-limiting slide rail 12 and can slide along the axial direction of the slide rail 12. The barb 10 is engaged with the latch 9, and the bottom of the barb 10 is in contact with the self-locking switch force platform 7. A connecting frame 13 is movably provided inside the mounting housing 5. One end of the connecting frame 13 is rotatably connected to the inner wall of the mounting housing 5, and the other end of the connecting frame 13 is rotatably connected to the self-locking switch force platform 7.

[0025] The overall length is less than or equal to 6mm, and the distance from which the pressed component rebounds to its initial position is 5.8mm.

[0026] The self-locking switch body size is less than or equal to 2mm x 3mm.

[0027] The maximum distance limiting structure 15 inside the slide rail 12 is used to control the rebound stroke of the pressing head 3. The maximum distance limiting structure 15 corresponds to a 1mm locking rebound stroke and a 5.8mm unlocking rebound stroke.

[0028] The slide rail 12 limits the pressing head 3 to move only along the axial direction, and the width of the slide rail 12 is adapted to the limiting member 11 with a gap of less than or equal to 0.1 mm.

[0029] More specifically, in the initial state, the pressing head 3 is in the uppermost position under the rebound force of the micro spring 6. When locking is required, the user applies a downward force to the pressing head 3. The pressing head 3 drives the two side limiting pieces 11 to slide downward along the slide rail 12. At the same time, the pressing head 3 drives the barb 10 to move downward, causing the barb 10 to push the self-locking switch force platform 7, which compresses the micro spring 6. Simultaneously, the barb 10 of the pressing head 3 pushes the latch 9, causing the latch 9 to deform the elastic plate 8 outward, thus shifting the latch 9 body outward. When the pressing head 3 slides to the lowest point, the user releases the external force, and at this time, the elastic plate 8 drives the latch 9 to reset. At this time, the micro spring 6 generates a rebound force to push the self-locking switch force platform 7 to slide upward, and the self-locking switch force platform 7 pushes the pressing head 3 upward. After the pressing head 3 moves upward by 1mm, the barb 10 and the latch 9 body form a locking state. At the same time, the maximum distance limiting structure 15 of the slide rail 12 prevents the limiting pieces from moving downward. 11 and the pressing head 3 continue to move upward, so that the pressing head 3 stops at this position to complete the locking. When unlocking is required, the user applies a downward force to the pressing head 3 again, and the pressing head 3 slides downward along the direction limiting slide rail 12. The barb 10 at the bottom of the pressing head 3 applies pressure to the self-locking switch body through the self-locking switch force platform 7. After the self-locking switch body is pressed, the unlocking action is triggered, which releases the engagement state between the barb 10 of the pressing head 3 and the self-locking switch body. After the user releases the external force, the micro spring 6 generates a rebound force to push the pressing head 3 to move upward along the direction limiting slide rail 12. The pressing head 3 continues to move upward until the limiting member 11 and the maximum distance limiting structure 15 at the top of the slide rail 12 abut again. The pressing head 3 returns to the initial position, which is 5.8mm away from the surface of the housing 1, to complete the unlocking. Throughout the entire locking and unlocking process, the pressing head 3 always moves along the axial direction of the direction limiting slide rail 12 without deviation, and the rebound distance is precise and controllable to ensure that the pressing head 3 is hidden inside the housing 1 in all states.

[0030] In summary, during use or operation of the overall equipment: the pressing head 3 is a cylindrical structure with a diameter of 13.9mm; the barb 10 is located at the bottom of the pressing head 3 and is a hook-shaped structure for engaging with the latch 9; the bottom length of the barb 10 is less than or equal to 3mm, and the bottom width of the barb 10 is less than or equal to 1.8mm; the slide rail 12 includes a direction limiting part 14 and a maximum distance limiting structure 15; the direction limiting part 14 of the slide rail 12 is a long strip-shaped groove structure with an inner diameter of 3.1mm, which matches the outer diameter of the pressing head 3 with a gap of 0.1mm. When the pressing head 3 is in the initial position... When the position limiter 11 abuts against the maximum distance limit structure 15, when the pressing head 3 is in the locked position, the pressing head 3 moves downward and rebounds 1mm. The maximum distance limit structure 15 restricts it from moving upward. The main body of the latch 9 is a miniature switch structure with a size of 2mm x 3mm. The force platform 7 for the self-locking switch is a horizontally set support plate that contacts the bottom of the barb 10. The reset component is a miniature spring 6 with a diameter of 1.5mm and a length of 4mm. The pressing head 3 is used to receive external force. The barb 10 and the latch 9 cooperate to achieve the locking function.

[0031] In the initial state, the pressing head 3 is in the uppermost position under the rebound force of the micro spring 6. When locking is required, the user applies a downward force to the pressing head 3. The pressing head 3 drives the two side limiting pieces 11 to slide downward along the slide rail 12. At the same time, the pressing head 3 drives the barb 10 to move downward, causing the barb 10 to push the self-locking switch force platform 7, which compresses the micro spring 6. Simultaneously, the barb 10 of the pressing head 3 pushes the latch 9, causing the latch 9 to deform the elastic plate 8 outward, thus shifting the latch 9 body outward. When the pressing head 3 slides to the lowest point, the user releases the external force, and at this time, the elastic plate 8 drives the latch 9 to reset. At this time, the micro spring 6 generates a rebound force to push the self-locking switch force platform 7 to slide upward, and the self-locking switch force platform 7 pushes the pressing head 3 upward. After the pressing head 3 moves upward by 1mm, the barb 10 and the latch 9 body form a locking state. At the same time, the maximum distance limiting structure 15 of the slide rail 12 prevents the limiting piece 11 from moving downward. The pressing head 3 continues to move upward, causing it to stop at the locked position. When unlocking is required, the user applies a downward force to the pressing head 3 again, causing it to slide downward along the direction-limiting slide rail 12. The barb 10 at the bottom of the pressing head 3 applies pressure to the self-locking switch body through the force platform 7. After the self-locking switch body is pressed, it triggers the unlocking action, releasing the engagement between the barb 10 of the pressing head 3 and the self-locking switch body. After the user releases the external force, the micro spring 6 generates a rebound force, pushing the pressing head 3 upward along the direction-limiting slide rail 12. The pressing head 3 continues to move upward until the limiting member 11 and the maximum distance limiting structure 15 at the top of the slide rail 12 abut against each other again. The pressing head 3 returns to its initial position, which is 5.8 mm away from the surface of the housing 1, thus completing the unlocking process. Throughout the entire locking and unlocking process, the pressing head 3 always moves axially along the direction-limiting slide rail 12 without deviation, and the rebound distance is precise and controllable, ensuring that the pressing head 3 is hidden inside the housing 1 in all states.

[0032] Of all the solutions mentioned above, those involving connections between two components can be selected based on the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other well-known connection methods. These will not be elaborated on here. For all the fixed connections mentioned above, welding is the preferred option. In all the solutions mentioned above, the operation of electrical components, unless otherwise specified, is controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and wiring connections are existing, well-known, and mature technologies, and their specific circuit structures will not be described in detail here. The specific models and specifications of the electrical components involved in this solution need to be selected and determined according to the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, and therefore will not be described in detail. Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies and will not be described in detail in this utility model. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A concealed self-locking spring lock structure, comprising a housing (1), characterized in that: A limiting shell (2) is detachably provided on one side of the housing (1). A pressing head (3) is slidably provided inside the limiting shell (2). A limiting frame (4) is fixedly provided inside the housing (1). A mounting shell (5) is detachably provided in the limiting frame (4). A miniature spring (6) is movably provided in the mounting shell (5). A self-locking switch force platform (7) is provided on one side of the miniature spring (6). The self-locking switch force platform (7) is slidably provided inside the mounting shell (5). The two sides of the self-locking switch force platform (7) are symmetrically connected. An elastic plate (8) is provided, and a buckle (9) is connected to the other end of the elastic plate (8). A barb (10) is connected to one side of the pressing head (3). The bottom length of the barb (10) is less than or equal to 3 mm, and the bottom width of the barb (10) is less than or equal to 1.8 mm. The diameter of the pressing head (3) is less than or equal to 13.9 mm. Limiting members (11) are symmetrically provided on both sides of the pressing head (3). A slide rail (12) is provided in the limiting shell (2). The limiting member (11) slides inside the slide rail (12).

2. The concealed self-locking spring latch structure according to claim 1, characterized in that: The miniature spring (6) provides the rebound force for the pressing head (3), and the miniature spring (6) has a diameter of less than or equal to 1.5 mm and a length of less than or equal to 4 mm.

3. The concealed self-locking spring latch structure according to claim 2, characterized in that: The pressing head (3) is embedded in the direction-limiting slide rail (12) and can slide along the axial direction of the slide rail (12). The barb (10) engages with the latch (9). The bottom of the barb (10) contacts the self-locking switch force platform (7).

4. The concealed self-locking spring latch structure according to claim 3, characterized in that: The mounting housing (5) is provided with a connecting frame (13) inside. One end of the connecting frame (13) is rotatably connected to the inner wall of the mounting housing (5), and the other end of the connecting frame (13) is rotatably connected to the self-locking switch force platform (7).

5. The concealed self-locking spring latch structure according to claim 4, characterized in that: The overall length is less than or equal to 6mm, and the distance from which the pressing head (3) rebounds to the initial position is 5.8mm.

6. The concealed self-locking spring latch structure according to claim 5, characterized in that: The self-locking switch body size is less than or equal to 2mm multiplied by 3mm.

7. The concealed self-locking spring latch structure according to claim 6, characterized in that: The maximum distance limiting structure (15) inside the slide rail (12) is used to control the rebound stroke of the pressing head (3). The maximum distance limiting structure (15) corresponds to a 1mm locking rebound stroke and a 5.8mm unlocking rebound stroke.

8. The concealed self-locking spring latch structure according to claim 7, characterized in that: The slide rail (12) limits the pressing head (3) to move only along the axial direction, and the width of the slide rail (12) is adapted to the limiting member (11) with a gap of less than or equal to 0.1 mm.

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