Knob type locking buckle

Abstract

A knob type locking buckle comprises a middle shaft sleeve, a clamping groove end piece and a clamp end piece, the clamping groove end piece and the clamp end piece are correspondingly arranged at the two ends of the middle shaft sleeve respectively and inserted into the middle shaft sleeve to be in butt joint with a lock catch, a clamping groove is formed in the end of the clamping groove end piece, a spirally-coiled sliding groove is formed in the circumferential wall of the clamping groove end piece, and a protruding column corresponding to the spirally-coiled sliding groove is arranged on the inner wall of the middle shaft sleeve. When the clamping groove end piece is inserted into the middle shaft sleeve, the protruding column on the inner wall of the middle shaft sleeve is clamped into the sliding groove to limit the limiting position where the clamping groove end piece extends out of the middle shaft sleeve to be exposed out of the clamping groove and retreat from the middle shaft sleeve, and the end, facing the middle shaft sleeve, of the clamp end piece is provided with a clamping end structure clamped into the clamping groove. According to the knob type locking buckle disclosed by the utility model, the clamping groove end piece can be switched between two different states of exposing the clamping groove part and folding and shielding the clamping groove part through the rotary progressive sliding groove and the bulge structure, so that the matched clip end piece is clamped into the clamping groove to realize opening and closing of a jewelry rope chain, and the knob type locking buckle is simple in structure and convenient to use. Fatigue failure is effectively prevented, and connection is stable and reliable. And the product quality and the use experience are improved.

Description

[Technical Field]

[0001] This utility model relates to the field of jewelry technology, and in particular to the field of locking mechanisms used in the connection of jewelry cords and chains. [Background Technology]

[0002] As living standards continue to improve, people's enthusiasm for jewelry products is also rising, and their requirements for jewelry categories and aesthetics are becoming more and more diversified. Necklaces, bracelets and earrings are among the most common types of jewelry, and they have always been loved by consumers of all levels and ages, becoming major consumer products.

[0003] For jewelry such as bracelets, necklaces, and cords, there are styles with fixed, inseparable connections, as well as styles that open and close using movable clasps. The oldest connection method is the lobster clasp. With the development of precision hardware processing or precious metal processing technology, various types of clasp structures have gradually emerged, including snap clasps, rotating locking clasps, and press-fit clasps, among other connection devices with different structures and matching methods. Considering the current technical requirements, the structures used in jewelry need to be small in size and have high reliability requirements, making structural design quite difficult. Moreover, since the clasps used in jewelry are high-frequency opening and closing components, there are many related requirements regarding their fatigue limit and ease of wearing.

[0004] Currently, common locks on the market have simple structures, such as snap-on structures. Repeatedly opening and closing the snap can loosen the buckle, leading to the risk of it accidentally coming loose and falling off. There are also magnetic buckles, which may be accidentally hooked in daily life, causing the magnetic part to be opened by external force, potentially leading to the buckle coming off. To address these issues, we need to design lock products that are simple in structure but highly reliable. [Summary of the Invention]

[0005] This utility model addresses existing problems by proposing a locking buckle structure suitable for jewelry cord chains. It is used to set and connect to both ends of the jewelry cord chain, allowing for easy opening and closing to complete the wearing process. At the same time, it needs to have a simple structure, low manufacturing cost, good reliability and safety, and be suitable for repeated opening and closing without easily failing or reaching the fatigue limit in a short time, thereby improving the user experience.

[0006] A knob-type locking buckle, characterized in that the knob-type locking buckle includes a central sleeve, a slot end piece, and a clip end piece, the slot end piece and the clip end piece respectively corresponding to the two ends of the central sleeve, and are inserted into the central sleeve to engage the locking buckle, wherein the end of the slot end piece is provided with a slot, and its peripheral wall is provided with a spirally coiled sliding groove, and the inner wall of the central sleeve is provided with a protrusion corresponding to the spirally coiled sliding groove, when the slot end piece is inserted into the central sleeve, the protrusion on the inner wall of the central sleeve engages with the sliding groove to limit the slot end piece from extending out of the central sleeve to the limit position of exposing the slot and retracting from the central sleeve, and the end of the clip end piece facing the central sleeve is provided with a clip end structure that engages with the slot.

[0007] The slot end piece is cylindrical in shape, with a U-shaped slot at one end facing the central shaft sleeve, and a spiral groove on the circumferential wall of the cylinder.

[0008] A protruding post is provided inside the central bushing, including an insert protruding post and an embedded protruding post.

[0009] The insertable protrusion includes a movable post and a protrusion hole. A through protrusion hole is provided on the central bushing, and the movable post is tightly inserted into it, forming a protrusion on the inner wall of the central bushing.

[0010] The embedded protrusion includes a protrusion integrally formed on the inner wall of the central bushing.

[0011] The knob-type locking buckle described in this utility model, through a spiral groove and a raised structure, allows the slot end piece to switch between two different states: the exposed slot portion and the retracted, concealed slot portion. This allows the mating clip end piece to be engaged into the slot, enabling the opening and closing of the jewelry chain. The structure is simple, effectively preventing fatigue failure, and ensuring a stable and reliable connection. This improves product quality and user experience. [Attached Image Description]

[0012] Figure 1 This is a schematic diagram of the disassembled structure of Embodiment 1 of the knob-type locking buckle involved in this utility model;

[0013] Figure 2 This is a cross-sectional view of Embodiment 1 of the knob-type locking buckle involved in this utility model;

[0014] Figure 3 This is a schematic diagram of the structure of embodiment 2 of the knob-type locking buckle involved in this utility model;

[0015] Figure 4 This is a cross-sectional view of embodiment 2 of the knob-type locking buckle involved in this utility model;

[0016] in:

[0017] 10. Central bushing; 11. Protruding post; 111. Insertion-type protruding post; 1111. Movable post; 1112. Protruding post hole; 112. Embedded protruding post;

[0018] 20. Slot end piece; 21. Slide groove; 22. Slot; 30. Clip end piece; 31. Clip end structure.

Detailed Implementation Methods

[0019] In the description of this utility model, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0020] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Example 1:

[0023] Please refer to the attached document. Figure 1 and attached Figure 2 The document illustrates a rotary locking buckle, which includes a central sleeve 10, a slot end piece 20, and a clip end piece 30. If the slot end piece 20 and the clip end piece 30 are respectively assembled to the two ends of the rope chain to be locked / movably connected, the opening and closing of the rope chain are completed by the slot end piece 20 and the clip end piece 30 being locked and connected in the central sleeve.

[0024] The slot end piece 20 and the clip end piece 30 are respectively located at both ends of the central bushing 10 and are inserted into the central bushing 10 to engage with the locking buckle. The slot end piece 20 has a slot 22 at its end and a spirally coiled groove 21 on its peripheral wall. The inner wall of the central bushing 10 has a protrusion 11 corresponding to the spirally coiled groove 21. When the slot end piece 20 is inserted into the central bushing 10, the protrusion 11 on the inner wall of the central bushing 10 engages with the groove 21, limiting the slot end piece 20 to the limit position of extending out of the central bushing 10 to expose the slot 22 and retracting the central bushing 10. The clip end piece 30 has a locking end structure 31 that engages with the slot 22 at one end facing the central bushing 10.

[0025] The slot end piece 20 is cylindrical in shape, with a U-shaped slot 22 at one end facing the central sleeve 10, and a spiral groove 21 on its cylindrical peripheral wall. The groove occupies a portion of the outer peripheral surface of the slot end piece 20, and its starting and ending points are determined by taking into account the length of the central sleeve 10 and the position of the protrusion inside the central sleeve 10. Its starting point allows the slot end piece 20 to be completely retracted inside the central sleeve 10, while its ending point allows the slot end piece 20 to move along the groove and the protrusion limit towards the clamp end piece 30 and extend outside the central sleeve 10, exposing the U-shaped slot 22 at its end.

[0026] The central bushing 10 is provided with a protruding post 11 that is adapted to the spirally wound groove 21. The protruding post 11 has two different structural forms, including an insert protruding post 111 and an embedded protruding post 112.

[0027] In this embodiment, the protrusion is an insertable protrusion 111, which includes a movable post 1111 and a protrusion hole 1112. A through protrusion hole 1112 is provided on the central bushing, and the movable post 1111 is tightly inserted therein, forming a protrusion on the inner wall of the central bushing.

[0028] Example 2:

[0029] Please refer to the attached document. Figure 3 The structure of Embodiment 2 is shown. This embodiment is the same as Embodiment 1 in all other aspects. The only difference is that the protrusion in the central bushing 10 is an embedded protrusion 112, which includes a protrusion integrally formed on the inner wall of the central bushing.

[0030] Therefore, the operation of the knob-type locking buckle is as follows: rotate the slot end piece 20 to move it within the central sleeve towards the direction of the latch end piece 30 until the slot end piece 20 exposes the U-shaped slot 22. Slide the latch end structure 31 of the latch end piece 30 into the U-shaped slot 22, then rotate the slot end piece 20 back within the central sleeve 10 until the entire slot end piece 20 is hidden within the central sleeve 10. The locking process is complete. To unlock, simply reverse the operation.

[0031] The rotary locking buckle described in this utility model utilizes a rotating, progressively sliding groove and protruding structure to allow the slot end piece to switch between two different states: exposed and retracted, thus engaging the mating clip end piece to open and close the jewelry chain. The structure is simple, effectively preventing fatigue failure and ensuring a stable and reliable connection. This enhances product quality and user experience. Furthermore, by treating the locking part as a standalone component, it allows for product upgrades and interchangeability, increasing its added value.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A knob-type locking buckle, characterized in that, The knob-type locking buckle includes a central sleeve, a slot end piece, and a clip end piece. The slot end piece and the clip end piece are respectively located at both ends of the central sleeve and are inserted into the central sleeve to engage the locking buckle. The end of the slot end piece is provided with a slot, and its peripheral wall is provided with a spirally coiled sliding groove. The inner wall of the central sleeve is provided with a protrusion corresponding to the spirally coiled sliding groove. When the slot end piece is inserted into the central sleeve, the protrusion on the inner wall of the central sleeve engages with the sliding groove, limiting the slot end piece to extend out of the central sleeve to the limit position of exposing the slot and retracting from the central sleeve. The end of the clip end piece facing the central sleeve is provided with a locking end structure that engages with the slot.

2. The knob-type locking buckle according to claim 1, characterized in that, The slot end piece is cylindrical in shape, with a U-shaped slot at one end facing the central shaft sleeve, and a spiral groove on the circumferential wall of the cylinder.

3. The knob-type locking buckle according to claim 2, characterized in that, A protruding post is provided inside the central bushing, including an insert protruding post and an embedded protruding post.

4. The knob-type locking buckle according to claim 3, characterized in that, The insertable protrusion includes a movable post and a protrusion hole. A through protrusion hole is provided on the central bushing, and the movable post is tightly inserted into it, forming a protrusion on the inner wall of the central bushing.

5. The knob-type locking buckle according to claim 3, characterized in that, The embedded protrusion includes a protrusion integrally formed on the inner wall of the central bushing.

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