Self-locking hook to prevent unexpected opening

Abstract

The present invention discloses a self-locking hook for preventing unexpected opening. When a push button is pressed, a spring is compressed, causing a push arm and an axle pin to be fully inserted into a socket. The axle pin then leaves a transverse clip position and forms an openable state with a support arm, in which they can rotate along the curved slide rail in a mounting slot. An elastic arm is mounted inside the mounting slot and is pressed against the underside of the support arm to displace a locking hook and maintain the locking state between the locking arm and the hook arm. The locking hook can only be rotated while the push button is pressed.The present invention can prevent the locking hook from opening directly under pressure, thereby avoiding unexpected opening and release of the hook.

Description

BACKGROUND OF THE INVENTION 1. TECHNICAL AREA

[0001] The present invention relates generally to the technical field of metal accessories and in particular to a hook for attachment to loops, rings and other objects. 2. State of the art

[0002] Hooks are commonly used on clothing, luggage, sports equipment, and pet products to attach loops, rings, and other items.

[0003] Document US 1,603,975 A shows a fastening buckle for a bracelet. Document DE 694 01 376 T2 describes a swivel hook comprising a housing body, a hook element on the housing body, a snap element attached to the housing body and movable in or out of engagement with the hook element, and a biasing device that biases the snap element in the direction of engagement with the hook element. Document US 865,224 A shows a similarly constructed track hook.

[0004] There are currently two main types of hooks on the market: A. Bolt snap hooks & B. Snap hooks. A. The bolt snap hook has a vertical bolt closure on the hook's opening flap and uses the elasticity of a spring (compression spring) to close the hook flap. It can be pressed directly downwards to open the flap. B. A snap hook has a rotating gate.

[0005] The hook can be opened by pressing the clasp downwards.

[0006] While these two types of hooks are very common, few people realize that they can unexpectedly open / unlock if they twist or if the locking mechanism is pushed back by attached objects. For example, if a D-shaped loop is attached to a hook and this loop becomes entangled, compressing the hook's locking bolt, the bolt can be forced back, creating the risk of the hook opening / loosening. To prevent unexpected opening, some lockable hooks are currently available. However, existing lockable hooks have relatively complex designs, resulting in awkward installation and difficult operation.

[0007] To overcome this problem, the present invention, entitled "Self-locking swivel hook", introduces a technology which effectively solves the above-mentioned problems, reduces the probability of unexpected unlocking, and improves the user-friendliness and safety of the hook. SUMMARY OF THE INVENTION

[0008] The technical problems that the present invention aims to solve are shortcomings of conventional technologies. In contrast, a self-locking hook for preventing unexpected opening and unlocking is characterized by a simpler structure, a more efficient design, and greater safety.

[0009] To solve the aforementioned problems, the present invention employs the following technical solution: A self-locking hook to prevent unexpected opening, comprising a hook base and a locking hook, wherein the locking hook is connected to the hook base by a rotating shaft to form a relatively rotatable assembly; wherein the head of the hook base is provided with an opening, and wherein a hook arm is formed on one side of the opening; and wherein a fastening slot is located in the hook base, wherein a -shaped transverse clip position with a curved slide rail on both sides arranged within the mounting slot; and wherein the locking hook has an L-shaped bent structure comprising a locking arm and a support arm, the support arm being embedded in the mounting slot of the hook foot, and wherein the locking arm projects out towards the opening of the hook foot, characterized in that the structure comprises a push button and an elastic arm, the front end of the push button being extended with a pressure arm, and wherein the pressure arm is located within the mounting slot, while the push button projects out of the hook foot of the rear slot at the rear end of the mounting slot;and wherein a insertion hole matching the pressure arm and extending inwards is formed along the rear end of the support arm, and wherein a spring is arranged within the insertion hole, and wherein this spring is pressed against the front end of the pressure arm, and when the push button is pressed downwards, this spring is compressed, the pressure arm together with the axle pin being fully inserted into the insertion hole, wherein at this point the axle pin leaves the transverse clip position and forms an openable state with the support arm in which they can rotate along the curved slide rail within the mounting slot; wherein the elastic arm is fitted within the mounting slot and is pressed against the underside of the support arm to maintain the locked state between the locking arm and the hook arm.

[0010] Furthermore, it can be provided that an axle pin is arranged transversely to both sides of the pressure arm; accordingly, a long opening structure matching the axle pin is arranged on each side of the insertion hole, with the axle pin being held in the opening structure. The axle pin also protrudes on both sides of the pressure arm and interacts with the -shaped transverse clip positions and the curved sliding rails on both sides of the mounting slot inside the hook combine to form a self-clamping structure which can be opened by a two-stage action of pushing and turning.

[0011] Furthermore, the entire locking hook can be an L-shaped structure. The curved part of the locking hook is provided with a shaft hole. A swivel shaft is inserted through the shaft hole and connected to the hook base via the mounting hole.

[0012] Furthermore, the elastic arm may be connected to a decorative cap. The decorative cap is inserted into the slot opening at the front end of the mounting slot to cover the mounting slot from the front end. The elastic arm extends upwards in a curved manner from the underside of the support arm to press against the underside of the support arm. Similarly, the elastic arm may be replaced by a metal tongue or a spring to provide the source of the elastic force against the support arm.

[0013] Furthermore, a positioning hole may be provided near the front edge of the bolt base, and a bracket is attached to both sides of the decorative cap. By snapping the bracket into the positioning hole, the decorative cap is joined and secured to the hook base.

[0014] Furthermore, the hook arm's head section may be fitted with a hook head. The hook head section is equipped with a locking head. The locking head and the hook head form an inverted T-shaped structure. The end of the locking arm has a locking slot whose shape matches the hook head and the locking head. When the locking arm and hook arm engage, the hook head and the locking head are caught in the locking slot. The hook arm thus forms a closed (non-unilaterally load-bearing) load-bearing structure that effectively shares the load on the hook arm and gives the hook body a higher tensile strength.

[0015] Furthermore, the self-locking hook may be characterized by the following to prevent unexpected opening: the hook base, the locking hook, and the push button may be made of metal or plastic; and / or the push arm and the push button may have an integral or separate structure; and / or the decorative cap and the elastic arm form an integral structure or, as required, a separate structure of decorative cap and elastic arm, made of metal or plastic, may be selected.

[0016] Furthermore, the lower end of the hook foot may be provided with a connecting head. The connecting head and the hook foot are formed as an integral structure. A pivoting connecting loop is attached to the connecting head. The connecting loop is locked onto the connecting head by a clamping ring.

[0017] The present invention provides a push button in combination with an elastic arm for controlling the locking hook. The push button is arranged opposite the opening of the hook. Only when the push button is pressed and pushed downwards can the locking hook be rotated to unlock it. When the push button is released, the locking hook automatically springs back, and the pivot pin springs back into place. The D-shaped cross-clip position implements the self-locking function. This two-stage process effectively prevents unexpected unlocking / release if the locking arm and D-shaped loop become entangled, and it prevents the locking hook from being opened by direct pressure, thus eliminating the safety risks of the hook unexpectedly opening and unlocking. After the push button has been pressed down, the locking hook can be opened by sliding the push button or by directly pushing the locking hook inwards. This operation is extremely convenient.Furthermore, in an emergency, the requirement for rapid unlocking can be met, since the processes of unlocking by pressing and opening the locking arm are a continuation of the same hand movement, unlike conventional lockable hooks where unlocking takes additional time because the hook must be unlocked before opening. EXPLANATION OF THE FIGURES Fig. Figure 1 is an overall view of the structure of a preferred embodiment of the present invention; Fig. Figure 2 is a structural overview of the embodiment of the present invention from a different perspective; Fig. Figure 3 is an exploded view of an embodiment of the present invention; Fig. 4 is an exploded view of the embodiment of the present invention from a different perspective; Fig. Figure 5 is a sectional view of the embodiment of the present invention from a locked state to an unlocked state. DETAILED DESCRIPTION OF THE PREFERRED EXECUTION EXAMPLE

[0018] In the present invention, as described in the Fig. As shown in Figures 1 to 5, the self-locking hook for preventing unexpected opening consists of a hook base 1 and a locking hook 2. The locking hook 2 is joined to the hook base 1 by a pivot shaft 6 to form a structure rotatable relative to each other. The head of the hook base 1 has an opening. One side of the opening is formed with a hook arm 11. The locking hook 2 forms a curved structure with a locking arm 21 and a support arm 22. The support arm 22 is integrated into the mounting slot 14 of the hook base 1. The locking arm 21 extends towards the opening of the hook base 1. The structure also includes a push button 3 and an elastic arm 51. The front end of the push button 3 is extended by a pressure arm 31. The pressure arm 31 is located inside the mounting slot 14.The push button 3 extends from the rear slot 15 at the rear end of the mounting slot 14 out of the hook foot 1, so that the latter can be pressed down. Along the rear end of the support arm 22, an inwardly extending insertion hole 25 is formed, matching the push arm 31. A spring 4 is arranged inside the insertion hole 25. The spring 4 is pressed against the front end of the push arm 31. When the push button 3 is pressed down (see solid short arrow in ). Fig. 5), the spring 4 is compressed, the pressure arm 31 is fully inserted into the insertion hole 25, while the axle pin 32 leaves the transverse clip position 141 in the mounting slot 14, so that the support arm 22 forms a coupled rotary connection. The locking hook 2 can be engaged by the pressure arm 31 (see hollow arrow in Fig. 5) move so that it rotates along the inner curved slide rail 142, causing the locking arm 21 to rotate inwards and open the hook. The elastic arm 51 is mounted within the mounting slot 14 and presses against the underside of the support arm 22 to maintain the locked position between the locking arm 21 and the hook arm 11. Once the push button 3 is released, the push button 3 and the axle pin 32 are compressed by the elastic arm 51 and return along the inner curved slide rail 142 to the transverse clip position 141, with the push button 3 rebounding from the rear slot 15 under the action of the spring 4 and the push arm 31 substantially retracting from the insertion hole 25. The axle pin 32 is retracted and rests against the transverse clip position 141, thus completely disengaging the connection.Under the action of the elastic arm 51, the locking hook 2 is rotated and reset, so that the locking arm 21 and the hook arm 11 are locked together. In this way, the structure can achieve self-locking.

[0019] An axle pin 32 is arranged transversely on both sides of the pressure arm 31, and a long opening structure, matching the axle pin 32, is arranged on both sides of the insertion hole 25. The axle pin 32 is held within the opening structure. The axle pin 32 protrudes on both sides of the pressure arm 31 and, together with the -shaped transverse clip position 141 and the curved slide rail 142 on both sides within the mounting slot 14 form a clamping structure which can be opened by the two-stage action of pushing and turning, as shown by the action path a of the axle pin 32 (dashed arrow) in the Fig.Figure 5 shows that when the push button 3 is released, the locking hook 2 automatically springs back in the opposite direction of path a, and the axle pin 32 snaps into the -shaped cross-clip position 141 back, thereby implementing the self-locking function.

[0020] The entire locking hook 2 has an L-shaped structure. The curved part of the locking hook 2 is equipped with a shaft hole 23. The pivot shaft 6 is inserted through the shaft hole 23 and connected to the mounting hole on the hook base 1.

[0021] The elastic arm 51 is connected to a decorative cap 5. The decorative cap 5 is inserted into the slot opening at the front end of the mounting slot 14 to cover the mounting slot from the front end 14. The elastic arm 51 extends in a curved manner from the underside of the support arm 22 and is pressed against the base surface of the support arm 22.

[0022] A positioning hole 16 is located near the front edge of the hook base 1, and a clip is attached to both sides of the decorative cap 5. Snapping the bracket into the positioning hole 16 joins and secures the decorative cap 5 to the hook base 1. Assembly is convenient and can be carried out without screws.

[0023] The head of the hook arm 11 is equipped with a hook head 12. The head of the hook head 12 is provided with a locking head 13. The locking head 13 and the hook head 12 form an inverted T-shaped structure. A locking slot 24, shaped to fit the hook head 12 and the locking head 13, is provided at the end of the locking arm 21. When the locking arm 21 and the hook arm 11 engage, the hook head 12 and the locking head 13 are held in the locking slot 24 to prevent oscillation and ensure a stable locking connection. The hook arm 11 forms a closed (non-unilaterally load-bearing) load-bearing structure that effectively distributes the load acting on the hook arm 11 and provides the hook body with a greater tensile strength.

[0024] The hook base 1, the locking hook 2, and the push button 3 are made of metal or plastic. The pressure arm 31 and the push button 3 are formed as an integral or separate structure. The decorative cap 5 and the elastic arm 51 are formed as an integral or separate structure made of metal or plastic materials.

[0025] The lower end of the hook foot 1 is equipped with a connecting head 17. The connecting head 17 and the hook foot 1 are formed as an integral structure. A pivotable connecting loop 7 is connected to the connecting head 17. The connecting loop 7 is locked on the connecting head 17 by a clamping ring.

[0026] Although the invention has been described in relation to its preferred embodiment, it is self-evident that many other possible modifications and variations could be made without affecting the character and scope of the invention as claimed below. REFERENCE MARK LIST 1 hook foot 11 Hook arm 12 hook heads 13 Locking head 14 mounting slots 141 Cross-clip position 142 curved sliding rail 15 Back slit 16 positioning holes 17 Connecting head 2 locking hooks 21 Locking arm 22 Support arm 23 shaft holes 24 locking slots 25 insertion holes 3 push buttons 31 Pressure arm 32 Axle pin 4 springs 5 decorative caps 51 elastic arm 6. Rotary shaft 7 Connecting loop a pathway

Claims

[1] Self-locking hook for preventing unexpected release and opening, comprising a hook base (1) and a locking hook (2), wherein the locking hook (2) is joined to the hook base (1) by a rotating shaft (6) to form a relatively rotatable assembly; the head of the hook base (1) is provided with an opening, wherein a hook arm (11) is formed on one side of the opening, wherein a fastening slot (14) is located in the hook base (1), wherein a -shaped transverse clip position (141) is arranged with a curved slide rail (142); wherein the locking hook (2) forms an L-shaped bent structure comprising a locking arm (21) and a support arm (22), wherein the support arm (22) is embedded in the mounting slot (14) of the hook foot (1), wherein the locking arm (21) projects outwards in the direction of the opening of the hook foot (1), characterized by, that the structure also comprises a snap fastener (3) and an elastic arm (51), wherein the front end of the snap fastener (3) is extended by a pressure arm (31), and wherein the pressure arm (31) is located inside the mounting slot (14), wherein the snap fastener (3) extends from a rear slot (15) at the rear end of the mounting slot (14) out of the hook foot (1), and wherein an insertion hole (25) matching the pressure arm (31) and extending inwards is formed along the rear end of the support arm (22), and wherein a spring (4) is arranged inside the insertion hole (25), wherein the spring (4) is compressible against the front end of the pressure arm (31), whereby when the snap fastener (3) is pressed down, the spring (4) is compressed and the pressure arm (31) and an axle pin (32) are fully inserted into the insertion hole (25),whereupon at this point the axle pin (32) leaves the transverse clip position (141) and forms an openable state with the support arm (22) in which they are rotatable along the curved slide rail (142) in the mounting slot (14); wherein the elastic arm (51) is mounted within the mounting slot (14) and presses against the underside of the support arm (22) to maintain the locked state between the locking arm (21) and the hook arm (11). [2] Self-locking hook to prevent unexpected release and opening according to claim 1, characterized by , that the axle pin (32) protrudes on both sides of the pressure arm (31), and wherein a long opening structure matching the axle pin (32) is arranged on both sides of the insertion hole (25), wherein the axle pin (32) is inserted into the opening structure, and furthermore, the axle pin (32) protruding on both sides of the pressure arm (31) together with the - the shaped transverse clip position (141) and the curved slide rail (142) on both sides inside the mounting slot (14) form a clamping structure which can be opened by the two-stage process of "pushing" and "turning", whereby when the push button (3) is released, not only does the locking hook (2) automatically spring back but also the axle pin (32) moves into the -shaped transverse clip position (141) springs back and implements the self-locking function. [3] Self-locking hook to prevent unexpected release and opening according to claim 1, characterized by , that the entire locking hook (2) has an L-shaped structure, wherein the curved part of the locking hook (2) is provided with a shaft hole (23), and wherein the rotating shaft (6) is inserted through the shaft hole (23) and is connected to a fastening hole on the hook base (1). [4] Self-locking hook to prevent unexpected release and opening according to claim 1, characterized by , that the elastic arm (51) is connected to a decorative cap (5), the decorative cap (5) being embedded in a slot opening at the front end of the mounting slot (14) to cover the mounting slot (14) from the front end, and the elastic arm (51) extending upwards in a curved shape from the underside of the support arm (22) to press against the bottom surface of the support arm (22); or the elastic arm (51) is replaceable by a metal tongue or by a spring to provide the source of the elastic force against the support arm (22). [5] Self-locking hook to prevent unexpected release and opening according to claim 4, characterized by, that a positioning hole (16) is arranged on the hook foot (1) at a location near the front edge, and that a clamp is arranged on both sides of the decorative cap (5), wherein the decorative cap (5) and the hook foot (1) are joined and fixed together by snapping the clamp into the positioning hole (16). [6] Self-locking hook to prevent unexpected release and opening according to claim 1, characterized by, that a hook head (12) is formed on the head part of the hook arm (11), wherein the head part of the hook head (12) is provided with a locking head (13), and wherein the locking head (13) and the hook head (12) form an inverted T-shaped structure, and wherein the end part of the locking arm (21) is arranged with a locking slot (24) in a shape which fits the hook head (12) and the locking head (13), and wherein the self-locking hook is designed such that when the locking arm (21) and the hook arm (11) interlock, the hook head (12) and the locking head (13) are clamped within the locking slot (24) and form a closed force-bearing structure together with the hook arm (11), thereby effectively distributing the load on the hook arm (11) and providing the hook body with a greater tensile strength. [7] Self-locking hook for preventing unexpected release and opening according to claim 1, wherein the hook base (1), the locking hook (2) and the push button (3) are made of metal or plastic; and / or the push arm (31) and the push button (3) have an integral or separate structure; and / or the decorative cap (5) and the elastic arm (51) are an integral structure or a separate structure of decorative cap (5) and elastic arm (51), which is made of metal or plastic. [8] Self-locking hook to prevent unexpected release and opening according to claim 1, characterized by, that a lower end of the hook foot (1), which is opposite the head part of the hook foot (1), is provided with a connecting head (17), wherein the connecting head (17) and the hook foot (1) are formed in one piece, and wherein a pivotable connecting loop (7) is connected to the connecting head (17), wherein the connecting loop (7) is locked on the connecting head (17) by a clamping ring.

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