Lock head capable of preventing looseness after being locked

Abstract

The utility model relates to the technical field of fitness equipment, and provides a lock head capable of preventing loosening after locking in order to prevent the lock head from loosening when threaded rod pieces such as a dumbbell or a barbell rod are used and improve safety, the lock head capable of preventing loosening after locking comprises a lock head body and a locking block, and a reducing hole, a clamping groove and an inner threaded hole which are coaxial are sequentially formed in the lock head body; the locking block comprises a reducing body and a clamping boss which are coaxial, the clamping boss is clamped in the clamping groove, and the outer wall face of the reducing body abuts against the inner surface of the reducing hole. The variable-diameter structural design is adopted, so that the inner diameter of the locking block is adjustable, the locking block can be tightly and stably arranged on the threaded rod piece in a sleeving mode, and the balance weight disc is prevented from shaking and making noise; meanwhile, due to the design of the clamping groove, the locking block has a certain axial movement displacement, and it is ensured that the locking block can move axially but is not prone to disengagement.

Description

Technical Field

[0001] The present application relates to the technical field of fitness equipment, and in particular to a lock head which can prevent loosening after being locked. Background Art

[0002] When using dumbbells composed of dumbbells, barbells and weight plates for fitness, a lock is needed to fix the weight plates on the dumbbells or barbells. When the existing locks on the market are used, the locks will become loose as the dumbbells and barbells move up and down during fitness exercises, which will cause the weight plates to shake and make noise, affecting the user experience and even causing the weight plates to fall and cause danger. Some locks with anti-loosening functions either have an anti-loosening mechanism that easily damages the surface of the weightlifting bar, or only improve the anti-loosening function without a good anti-loosening effect. Some locks also have an additional anti-loosening washer, which is not very convenient to use and is very easy to lose parts, resulting in the failure of the anti-loosening effect.

[0003] With regard to the above-mentioned related technologies, at present, the lock of dumbbells or barbells is easy to fall off when used, which leads to poor safety. Utility Model Content

[0004] In order to prevent the lock of threaded rods such as dumbbells or barbells from loosening during use and to improve safety, the present application provides a lock that prevents loosening after being locked.

[0005] This application adopts the following technical solutions:

[0006] A lock head that prevents loosening after being locked, comprising a lock head body and a locking block, wherein the lock head body is provided with a coaxial diameter-reducing hole, a locking groove and an internal threaded hole in sequence, wherein the end of the diameter-reducing hole close to the inner end surface of the lock head body is a large-diameter end, and the end of the diameter-reducing hole close to the locking groove is a small-diameter end;

[0007] The locking block comprises a coaxial diameter reducing body and a positioning boss, wherein the diameter reducing body and the positioning boss are provided with a through hole for an externally connected threaded rod in the axial direction, the diameter reducing body, the positioning boss and the through hole are coaxial, and the end of the diameter reducing body close to the positioning boss is a small diameter end; the locking block is provided with an adjustment port for adjusting the diameter of the through hole;

[0008] The locking boss is locked in the locking groove, and the outer wall surface of the diameter-changing body abuts against the inner surface of the diameter-changing hole.

[0009] By adopting the above technical solution, the locking block is pressed into the lock body to form a lock. After the lock is installed on a threaded rod such as a dumbbell or barbell rod, the inclined surface of the reducing hole can be squeezed to cause the locking block to undergo radial deformation, and the inner diameter of the locking block becomes smaller, so that the locking block can be tightly and firmly mounted on the threaded rod to prevent the lock from loosening, thereby locking the counterweight plate and avoiding shaking and noise of the counterweight plate caused by loosening of the lock.

[0010] The axial thickness of the locking boss is smaller than the axial length of the locking groove, and the outer diameter of the locking boss is smaller than the diameter of the locking groove.

[0011] By adopting the above technical solution and utilizing the positioning groove design, the locking block can have a certain axial movement displacement. When the counterweight plate is displaced or the posture changes during use, the locking block moves within the axial length range of the positioning groove. Since the lock head body can squeeze the inclined surface of the reducer of the locking block, the diameter of the locking block becomes smaller and then locked with the thread, so that the locking block can move axially but will not fall out easily.

[0012] When the locking block is in a natural state, the outer diameter of the locking boss is larger than the diameter of the small diameter end of the reducing hole.

[0013] By adopting the above technical solution, the locking block can be prevented from falling out, thereby ensuring the locking effect of the lock head.

[0014] The diameter of the through hole in a natural state is larger than the outer diameter of the threaded rod; the minimum adjustable diameter of the through hole is smaller than the outer diameter of the threaded rod.

[0015] By adopting the above technical solution, when installing the lock, it can be screwed in smoothly, and after tightening, the locking block and the threaded rod can be fully locked to ensure the locking effect.

[0016] The adjustment opening is a straight-line notch, and the straight-line notch axially penetrates the diameter-changing body and the positioning boss.

[0017] The adjustment opening is a lap-jointed buckle structure.

[0018] By adopting different adjustment port structures, the design requirements of locking blocks of different specifications and sizes can be met, and the invention has universality.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] 1. The lock body and locking block of the lock of the technical solution of the application adopt a variable diameter structure design. When the locking block is squeezed, the inner diameter of the locking block becomes smaller, so that the locking block can be tightly and firmly sleeved on the threaded rod, locking the counterweight plate to prevent the counterweight plate from shaking and making noise;

[0021] 2. The design of the positioning groove allows the locking block to have a certain axial movement displacement. When the counterweight plate is displaced or changes its posture during use, the locking block can move within the axial length range of the positioning groove. The lock body squeezes the reducing body inclined surface of the locking block to reduce the diameter of the locking block and then lock it with the thread, ensuring that the locking block can move axially but will not easily fall out;

[0022] 3. The design of the adjustment port structure and the main body of the lock can be diversified, can be adapted to different specifications and scenes, and is universal. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the lock of this application;

[0024] Figure 2 It is a structural cross-sectional view of the lock of the present application;

[0025] Figure 3 It is a structural diagram of the lock body of this application;

[0026] Figure 4 It is a structural cross-sectional view of the lock body of the present application;

[0027] Figure 5 This is a structural schematic diagram of the first embodiment of the locking block of the present application;

[0028] Figure 6 This is a structural schematic diagram of the second embodiment of the locking block of the present application;

[0029] Figure 7 This is a schematic diagram of the assembly structure of the lock used in this application;

[0030] Figure 8 for Figure 7 AA section view.

[0031] Description of reference numerals:

[0032] 1. Lock body; 11. Variable diameter hole; 12. Positioning groove; 13. Internal thread hole;

[0033] 2. Locking block; 21. Variable diameter body; 22. Positioning boss; 23. Adjustment port; 24. Through hole;

[0034] 3. Threaded rod; 4. Counterweight plate. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0036] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0038] The following is combined with Figure 1-8 This application is described in further detail.

[0039] like Figure 1 The lock shown is a lock that can prevent loosening after being locked, and comprises a lock body 1 and a locking block 2 that are assembled together, wherein the locking block 2 is inserted into the lock body 1 .

[0040] like Figure 3 and 4 The lock body 1 shown has a coaxial diameter-reducing hole 11, a locking groove 12 and an internal threaded hole 13 in sequence from the inner end face to the outer end face. The diameter-reducing hole 11 is a trumpet hole. The end of the diameter-reducing hole 11 close to the inner end face of the lock body 1 is a large diameter end, and the end of the diameter-reducing hole 11 close to the locking groove 12 is a small diameter end. The inner end face refers to the end face of the lock body 1 facing the side close to the counterweight plate 4 after the lock is assembled with the threaded rod 3 and the counterweight plate 4.

[0041] The locking block 2 includes a coaxial reducer 21 and a positioning boss 22. A through hole 24 for an externally connected threaded rod 3 is formed in the reducer 21 and the positioning boss 22 along the axial direction. The reducer 21, the positioning boss 22 and the through hole 24 are coaxial, and the end of the reducer 21 close to the positioning boss 22 is a small diameter end. The locking block 2 is provided with an adjustment port 23 for adjusting the diameter of the through hole 24. The structure of the adjustment port 23 can be in various forms, as long as the diameter of the adjustment through hole 24 can be changed under the action of force. For example, Figure 5 The straight notch shown, or a V-shaped notch similar to this notch, when the locking block 2 is squeezed, the notch becomes smaller, and then the diameter of the node through hole 24 becomes smaller. Figure 6 In the overlapping buckle structure shown, the locking blocks 2 on both sides of the adjustment port are overlapped, and a circumferential gap is reserved in the overlapping offset section. When the locking block 2 is squeezed, the diameter of the joint through hole 24 becomes smaller.

[0042] like Figure 1 and 2 As shown, when the lock body 1 and the locking block 2 are assembled, the locking boss 22 is locked in the locking groove 12 , and the outer wall surface of the diameter reducing body 21 abuts against the inner surface of the diameter reducing hole 11 .

[0043] In order to meet the adjustment function of the diameter of the through hole 24 when the locking block 2 is squeezed, the axial thickness of the locking boss 22 must be smaller than the axial length of the locking groove 12, and the outer diameter of the locking boss 22 must be smaller than the diameter of the locking groove 12, ensuring that the locking boss 22 can move smoothly along the axial direction in the locking groove 12.

[0044] When the locking block 2 is in the natural state, the outer diameter of the locking boss 22 is larger than the diameter of the small diameter end of the reducing hole 11 to prevent the locking block 2 from falling out.

[0045] The assembly diagram of the lock head, the threaded rod 3 and the counterweight plate 4 described in the present application is as follows: Figure 7 and 8As shown. During assembly, first insert the locking block 2 into the lock body 1 to form a lock, and then screw the lock into the threaded rod 3. When screwing in, the direction must be correct, that is, the internal threaded hole section of the lock body 1 is on the outside, and the diameter-reducing hole section of the lock body 1 is on the inside (the inside refers to the side close to the counterweight plate 4). During the screwing in process, the end face of the diameter-reducing body 21 of the locking block 2 first contacts the counterweight plate 4, and then continues to screw in. Under the simultaneous action of the counterweight plate 4 and the lock body 1, the locking block 2, the positioning boss 22, will move axially outward in the positioning groove 12 relative to the lock body 1. Under the extrusion of the inner wall of the diameter-reducing hole 11, the diameter-reducing body 21 will deform the locking block 2, and the adjustment port 23 will tighten, thereby reducing the diameter of the through hole 24 of the locking block 2 and locking it with the external threaded rod 3. Therefore, when the counterweight plate 4 is displaced or changes its posture during use, the lock will not move with the counterweight plate 4, thereby achieving the purpose of preventing loosening.

[0046] Because the locking boss 22 is embedded in the locking groove 12, when the lock needs to be withdrawn and disassembled, the lock body 1 can be rotated to allow the lock body 1 and the locking block 2 to be withdrawn together, thereby avoiding the anti-loosening failure caused by the loss of the locking block 2.

[0047] The inner wall surface of the reducing hole 11 and the outer surface of the reducing body 21 are designed to be as smooth as possible to facilitate sliding and prevent jamming. The surface of the end surface of the locking block 2 in contact with the counterweight plate 4 (i.e., the large end surface of the reducing body 21) is smooth, so that the locking block 2 is easy to slide when in contact with the counterweight plate 4. After the lock is locked, the lock body 1 does not rotate with the rotation or shaking of the counterweight plate 4. The inner surface of the through hole 24 of the locking block 2 is not smooth, which increases the locking force with the surface of the weight lifting rod.

[0048] The lock body 1 has various shapes and structures, and can be used as follows: Figure 3 The step shape shown may also be other structural shapes such as a column shape, and the outer surface of the lock body 1 may also be designed to be a smooth surface or an embossed surface according to different requirements such as aesthetics and feel.

[0049] The material selection of the lock body 1 and the locking block 2 is not limited, and materials such as metal and plastic can be used.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A lock that prevents loosening after being locked, characterized in that: The invention comprises a lock body (1) and a locking block (2), wherein the lock body (1) is provided with a coaxial reducing hole (11), a locking groove (12) and an internal threaded hole (13) in sequence, wherein the end of the reducing hole (11) close to the inner end surface of the lock body (1) is a large-diameter end, and the end of the reducing hole (11) close to the locking groove (12) is a small-diameter end; The locking block (2) comprises a coaxial diameter reducing body (21) and a locking boss (22); a through hole (24) for an externally connected threaded rod (3) is formed in the diameter reducing body (21) and the locking boss (22) along the axial direction; the diameter reducing body (21), the locking boss (22) and the through hole (24) are coaxial; the end of the diameter reducing body (21) close to the locking boss (22) is a small diameter end; and an adjusting port (23) for adjusting the diameter of the through hole (24) is formed on the locking block (2); The locking boss (22) is locked in the locking groove (12), and the outer wall surface of the diameter-changing body (21) abuts against the inner surface of the diameter-changing hole (11).

2. A lock head for preventing loosening after being locked according to claim 1, characterized in that: The axial thickness of the locking boss (22) is smaller than the axial length of the locking groove (12), and the outer diameter of the locking boss (22) is smaller than the diameter of the locking groove (12).

3. A lock head for preventing loosening after being locked according to claim 1, characterized in that: When the locking block (2) is in a natural state, the outer diameter of the locking boss (22) is greater than the diameter of the small diameter end of the reducing hole (11).

4. A lock head for preventing loosening after being locked according to claim 1, characterized in that: The diameter of the through hole (24) in a natural state is larger than the outer diameter of the threaded rod (3); and the minimum adjustable diameter of the through hole (24) is smaller than the outer diameter of the threaded rod (3).

5. The lock head for preventing loosening after being locked according to claim 1, characterized in that: The regulating opening (23) is a straight-line notch, and the straight-line notch axially penetrates the diameter-changing body (21) and the locking boss (22).

6. A lock head for preventing loosening after being locked according to claim 1, characterized in that: The adjustment opening (23) is a lap-jointed buckle structure.

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