Folding mechanism of hula hoop

Abstract

The utility model provides a folding mechanism of a hula hoop, which is arranged at the end parts of two adjacent movable joints of the hula hoop and comprises a first elastic sheet and a second elastic sheet which are respectively arranged at the end parts of the two movable joints, the surface of the first elastic sheet is provided with at least two clamping grooves which are concavely arranged, and the surface of the second elastic sheet is provided with at least two clamping grooves which are concavely arranged. The surface of the first elastic piece is provided with a clamping groove, the surface of the second elastic piece is provided with a protruding part matched with the clamping groove, when the two movable joints rotate relatively, the first elastic piece and the second elastic piece can rotate relatively, the protruding part on the second elastic piece is clamped into one clamping groove in the surface of the first elastic piece, and the effect of unfolding or folding the two movable joints is achieved. The hula hoop is simple in design structure and convenient to use, the two elastic pieces made of alloy are adopted to replace plastic pieces easy to wear in the prior art, the requirement for folding the hula hoop is met, meanwhile, the service life of the elastic pieces can be prolonged, and the problem that the hula hoop cannot be used due to wear or breakage is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hula hoop design, in particular to a folding mechanism of a hula hoop. Background Technique

[0002] A hula hoop is a popular fitness equipment, usually made of plastic, rubber or metal, in a circular ring shape. It can be rotated by placing the hula hoop around the waist or hips and twisting the body, thus achieving the effect of exercising the body. The hula hoop can not only exercise the waist and abdominal muscles, but also improve the coordination and flexibility of the body. In addition, hula hoop exercise is also an interesting leisure activity, suitable for people of all ages.

[0003] Traditional hula hoops are of an integral circular ring structure, which has the problem of inconvenient carrying and storage. To solve this problem, foldable hula hoops have emerged in the prior art, which can be folded when not in use, so as to reduce the occupied space and achieve the effect of convenient storage and carrying. For example, the Chinese utility model patent with the patent application number CN202322741729.1 discloses a quick-fold hula hoop, which can be folded and stored when idle to reduce space occupation, and can also avoid the problems of loss or wear of parts after storage.

[0004] However, in actual operation, the above-mentioned foldable hula hoop still has certain defects, which are mainly reflected in that the folding part of the above-mentioned foldable hula hoop uses a lock block and a spring piece to achieve the positioning effect. Since the lock block is a plastic part, it is easy to wear or break after long-term use, affecting the quick folding of the hula hoop and being very inconvenient. Summary of the Utility Model

[0005] The utility model provides a folding mechanism of a hula hoop to solve the problem that the lock block of the plastic part is easily worn and broken during use in the existing foldable hula hoop proposed in the above background technique.

[0006] The technical solution of the utility model is realized as follows:

[0007] A folding mechanism of a hula hoop, the folding mechanism is arranged at the end positions of adjacent two movable joints of the hula hoop, and includes a first spring piece and a second spring piece respectively installed at the end parts of the two movable joints. The surface of the first spring piece has at least two inwardly concave grooves, and the surface of the second spring piece is provided with a convex part matching the grooves. When the two movable joints rotate relatively, the first spring piece and the second spring piece can rotate relatively, and the convex part on the second spring piece is stuck into one of the grooves on the surface of the first spring piece to achieve the effect of unfolding or folding the two movable joints.

[0008] Preferably, the two movable joints are respectively the arc-shaped rod and the connecting rod of the hula hoop. The first elastic piece is fixed at the end of the connecting rod, and the second elastic piece is fixed at the end of the arc-shaped rod.

[0009] Preferably, an outwardly protruding first boss is provided at the end position of the connecting rod. A second boss protruding outward is provided at the center of the first boss. An installation groove for installing the first elastic piece is provided on the first boss. The second boss is connected to a through hole provided at the end of the arc-shaped rod.

[0010] Preferably, a slotted groove is provided at the edge position of the first boss. A limiting convex block slidably connected in the slotted groove is provided at the inner hole position of the end of the arc-shaped rod.

[0011] Preferably, it further includes a bolt for connecting the ends of the two movable joints of the hula hoop. The bolt passes through the two movable joints and a nut is installed at the end.

[0012] Preferably, the number of card slots provided on the first elastic piece is two.

[0013] Preferably, both the first elastic piece and the second elastic piece are made of alloy material.

[0014] Adopting the above technical solution, the beneficial effects of the present utility model are as follows:

[0015] The design structure of the present utility model is simple and convenient to use. Two elastic piece structures made of alloy material are used to replace the plastic parts that are prone to wear in the prior art. While meeting the folding work of the hula hoop, it can extend the service life of the elastic pieces and avoid the problem that the hula hoop cannot be used due to wear or fracture. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 is a structural schematic diagram of the present utility model;

[0018] Figure 2 is an exploded view of the present utility model;

[0019] Figure 3 is an installation structure diagram of the arc-shaped rod and the second elastic piece of the present utility model;

[0020] Figure 4 is an exploded view of the installation structure of the connecting rod and the first elastic piece of the present utility model;

[0021] Figure 5 This is the unfolded state diagram of the hula hoop of the present utility model;

[0022] Figure 6 This is the folded state diagram of the hula hoop of the present utility model;

[0023] Figure 7 This is the structural diagram of the first elastic piece in another embodiment of the present utility model;

[0024] Figure 8 This is the structural diagram of the second elastic piece in another embodiment of the present utility model;

[0025] Figure 9 This is the structural diagram of the second elastic piece in the third embodiment of the present utility model;

[0026] Figure 10 This is the structural diagram of the second elastic piece in the fourth embodiment of the present utility model;

[0027] Figure 11 This is the structural diagram of the second elastic piece in the fifth embodiment of the present utility model.

[0028] Wherein:

[0029] 1. Connecting rod; 101. First boss; 102. Second boss; 103. Installation groove; 104. Groove; 2. First elastic piece; 201. Card slot; 3. Second elastic piece; 301. Protrusion; 4. Arc rod; 401. Limit protrusion; 5. Nut; 6. Bolt. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] As shown in the figure, a folding mechanism of a hula hoop, the folding mechanism is arranged at the end positions of adjacent two movable joints of the hula hoop, and includes a first elastic piece 2 and a second elastic piece 3 respectively installed at the end parts of the two movable joints. Specifically, the two movable joints are respectively the arc rod 4 and the connecting rod 1 of the hula hoop. The first elastic piece 2 is fixed at the end of the connecting rod 1, and the second elastic piece 3 is fixed at the end of the arc rod 4; More specifically, the overall structure of the hula hoop includes a plurality of arc rods 4, and the adjacent two arc rods 4 are connected by a connecting rod 1, and the arc rod 4 and the connecting rod 1 can rotate relative to each other to achieve the folding effect of the hula hoop.

[0032] As Figures 1-4As shown, the surface of the first elastic piece 2 has at least two inwardly concave slots 201. In this example, there are two slots 201 opened on the first elastic piece 2. The surface of the second elastic piece 3 is provided with a protrusion 301 that matches the slot 201. When the two movable joints rotate relative to each other, the first elastic piece 2 and the second elastic piece 3 can rotate relative to each other, and the protrusion 301 on the second elastic piece 3 is snapped into one of the slots 201 on the surface of the first elastic piece 2 to achieve the effect of expanding or folding the two movable joints. In this example, the two slots 201 on the first elastic piece 2 are symmetrically arranged. When the protrusion 301 of the second elastic piece 3 cooperates with one of the slots 201, the hula hoop is in an expanded state. When it cooperates with the other slot 201, the whole hula hoop is in a folded state. In both states, a limiting effect is formed by the cooperation of the protrusion 301 and the slot 201. When the limit needs to be released, just force the arc-shaped rod 4 to rotate relative to the connecting rod 1.

[0033] In other embodiments, the structure of the first elastic piece 2 is as Figure 7 shown, and the structure of the third elastic piece 3 is as Figures 8-11 shown. Therefore, except for the structures of the above-mentioned slots 201 and protrusions 301, the specific shapes of the two elastic pieces are not limited herein.

[0034] Among them, both the first elastic piece 2 and the second elastic piece 3 are made of alloy material, specifically stainless steel or other alloy materials, which can mainly prevent problems such as wear or rupture caused by long-term friction.

[0035] Specifically, an outwardly protruding first boss 101 is provided at the end position of the connecting rod 1, and an outwardly protruding second boss 102 is provided at the center of the first boss 101. An installation groove 103 for installing the first elastic piece 2 is opened on the first boss 101, and the second boss 102 is connected to a through hole opened at the end of the arc-shaped rod 4; among them, the first boss 101 and the second boss 102 respectively correspond to the stepped holes on the arc-shaped rod 4. The first elastic piece 2 is embedded in the installation groove 103 on the first boss 101, and the second elastic piece 3 is also installed at the empty groove formed at the end of the arc-shaped rod 4 by the same principle. When the arc-shaped rod 4 is docked with the connecting rod 1, the two elastic pieces are in a fixed state and rotate synchronously with the arc-shaped rod 4 and the connecting rod 1 respectively.

[0036] Specifically, a slot 104 is provided at the edge position of the first boss 101, and a limiting protrusion 401 that is slidably connected in the slot 104 is provided at the inner hole position of the end of the arc-shaped rod 4. Such a setting is to make the arc-shaped rod 4 have a certain rotation range when rotating relative to the connecting rod 1 to avoid excessive rotation.

[0037] Specifically, it further includes a bolt 6 for connecting the ends of two movable joints of the hula hoop. The bolt 6 passes through the two movable joints and nuts 5 are installed at the ends to prevent relative movement between the arc-shaped rod 4 and the connecting rod 1 in the axial direction of the bolt 6, and only the degree of freedom for relative rotation between the two needs to be ensured.

[0038] When this folding structure of the hula hoop is in use, the first elastic piece 2 rotates as the connecting rod 1 rotates, and the second elastic piece 3 rotates as the arc-shaped rod 4 rotates. When the connecting rod 1 and the arc-shaped rod 4 rotate relative to each other, the convex portion 301 on the second elastic piece 3 will snap into one of the card slots 201 on the first elastic piece 2, making the connecting rod 1 and the arc-shaped rod 4 relatively stationary. In this state, the connecting rod 1 and the arc-shaped rod 4 are in a relatively unfolded state. When all adjacent connecting rods 1 and arc-shaped rods 4 of the hula hoop are in the unfolded state, that is, the hula hoop is in an overall unfolded state, for example Figure 5 as shown; when relative rotation is caused between the connecting rod 1 and the movable rod, the convex portion 301 will disengage from the card slot 201, and the first elastic piece 2 and the second elastic piece 3 will undergo a certain amount of elastic deformation until the convex portion 301 snaps into another card slot 201, and the connecting rod 1 and the arc-shaped rod 4 will be in a relatively stationary state again. In this state, the connecting rod 1 and the arc-shaped rod 4 are in a relatively folded state. When all adjacent connecting rods 1 and arc-shaped rods 4 of the hula hoop are in the folded state, that is, the entire hula hoop is in the folded state, for example Figure 6 as shown.

[0039] Since elastic pieces made of alloy material are used to replace traditional plastic lock blocks, when relative rotation occurs, the two elastic pieces will not cause excessive wear and will not easily break, which is beneficial to extending the overall service life of this folding structure and avoiding the problem that the hula hoop cannot be used.

[0040] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A folding mechanism of a hula hoop, the folding mechanism being arranged at the ends of two adjacent movable sections of the hula hoop, characterized in that: The invention comprises a first spring piece (2) and a second spring piece (3) respectively mounted on the ends of two movable joints, wherein the surface of the first spring piece (2) has at least two inwardly concave slots (201), and the surface of the second spring piece (3) is provided with a protrusion (301) matching the slots (201); when the two movable joints rotate relative to each other, the first spring piece (2) and the second spring piece (3) can rotate relative to each other, and the protrusion (301) on the second spring piece (3) is inserted into one of the slots (201) on the surface of the first spring piece (2), so as to achieve the effect of unfolding or folding the two movable joints.

2. A hula hoop folding mechanism according to claim 1, characterized in that: The two movable joints are respectively an arc-shaped rod (4) and a connecting rod (1) of the hula hoop; the first spring piece (2) is fixed to the end of the connecting rod (1); and the second spring piece (3) is fixed to the end of the arc-shaped rod (4).

3. A hula hoop folding mechanism according to claim 2, characterized in that: A first boss (101) protruding outward is provided at the end of the connecting rod (1), a second boss (102) protruding outward is provided at the center of the first boss (101), a mounting groove (103) for mounting the first elastic sheet (2) is provided on the first boss (101), and the second boss (102) is connected to a through hole provided at the end of the arc rod (4).

4. The folding mechanism of a hula hoop according to claim 3, characterized in that: A slot (104) is provided at the edge of the first boss (101), and a limiting protrusion (401) slidably connected in the slot (104) is provided at the inner hole of the end of the arc-shaped rod (4).

5. The folding mechanism of a hula hoop according to claim 1, characterized in that: It also includes a bolt (6) for connecting the ends of the two movable joints of the hula hoop. The bolt (6) passes through the two movable joints and a nut (5) is installed at the end.

6. The folding mechanism of a hula hoop according to claim 1, characterized in that: There are two slots (201) provided on the first elastic piece (2).

7. The folding mechanism of a hula hoop according to claim 1, characterized in that: The first spring piece (2) and the second spring piece (3) are both made of alloy material.

Images