Flexible counterweight seat and dumbbell thereof

Abstract

The utility model belongs to the technical field of fitness equipment, and particularly relates to a flexible counterweight seat and a dumbbell thereof, the flexible counterweight seat comprises a flexible main body and a support which are mutually fixed or integrally formed, the support is made of a hard material, the side edge of the flexible main body is provided with a filling channel, and the filling channel is communicated with an inner cavity of the flexible main body and the outside; the filler can enter the filling space through the filling channel and can move in the filling space; the filling channel can be sealed by the plug to form a closed filling space; at least one mounting position is arranged on one side, far away from the flexible main body, of the support; and an external component can be fixed on the mounting position and connected into a whole. The utility model provides a combinable flexible counterweight seat and a dumbbell thereof.

Description

Technical Field

[0001] This utility model belongs to the field of fitness equipment technology, specifically referring to a flexible weight seat and its dumbbells. Background Technology

[0002] Most dumbbells on the market are currently made of pure metal, with different weight configurations to meet various training requirements. Some products also allow for weight changes by replacing different weight plates, thus satisfying the actual needs of trainees. With the evolution of dumbbell products, and considering actual user needs, some dumbbells are now designed with soft materials or have a plastic or rubber layer covering the exterior of cast iron dumbbells. This changes the external flexibility to prevent injury to the body or surrounding equipment during exercise, and allows for the replacement of internal fillings to suit the unique needs of male or female athletes.

[0003] For example, Chinese patent CN202310187472.1 describes a flexible dumbbell, which includes a dumbbell body and a handle. The handle has a rigid inner core, and a grip is formed around the rigid inner core. The grip has large-diameter connecting parts at both ends. The dumbbell body is a hollow air bladder structure with an injection hole on its outer wall. An end plug is embedded in the injection hole, and an air nozzle module is located inside the center of the end plug. A through hole is provided in the fixing groove, and the air nozzle module communicates with the through hole. The rigid inner core is thermoplastically coated to fit the grip, and anti-slip protrusions prevent the two from slipping after assembly. This product provides a flexible dumbbell fit, but it also has certain shortcomings: it cannot be assembled, the product is fixed at the factory, and it lacks the ability to expand its functionality. Summary of the Invention

[0004] The purpose of this invention is to provide a combinable flexible counterweight base and its dumbbell.

[0005] The purpose of this utility model is achieved as follows:

[0006] A flexible counterweight base includes a flexible main body and a support that are fixed to each other or integrally formed. The support is made of a rigid material. The side of the flexible main body is provided with an injection channel, which connects the inner cavity of the flexible main body to the outside. Filler can enter the filling space through the injection channel and can move within the filling space. A plug can seal the injection channel and form a closed filling space.

[0007] The support has at least one mounting position on the side away from the flexible body, and external components can be fixed at the mounting position and connected as a whole.

[0008] Furthermore, the mounting position is a built-in threaded hole; the flexible body is a complete unit, and the flexible body can only be connected to the outside through the injection channel.

[0009] Furthermore, the inner cavity of the flexible body can be inflated, and the filling space can be kept in an expanded state. The filling material does not fill the filling space completely, and the filling material is kept at the lower end of the flexible body under the action of gravity.

[0010] Furthermore, the injection channel includes a positioning plug, which has a channel for installing a plug in the middle. The positioning plug is tightly connected to the flexible body to form an integral whole; the hardness of the positioning plug is greater than that of the flexible body.

[0011] Furthermore, the flexible body is integrally molded with a skirt, which covers the outside of the positioning plug. The skirt has an opening or gap, allowing filler and gas to pass through the positioning plug and the skirt into the inner cavity of the flexible body.

[0012] Furthermore, the plug is a flexible component, with an annular protrusion on its side. The plug enters the injection channel and is in a sealed state, with the annular protrusion deforming and tightly fitting against the inner wall of the injection channel.

[0013] Furthermore, a blind hole is provided on the inner side of the plug, which provides space for the plug to deform inward. The annular convex edge deforms and forces the inner diameter of the blind hole to decrease or partially close. The diameter of the annular convex edge is larger than that of the injection channel. When the plug is pushed into the injection channel, the annular convex edge tilts in the direction of entry.

[0014] A dumbbell includes the aforementioned flexible counterweight base and a handle bar, both ends of which are provided with threaded sections. The mounting position of the flexible counterweight base is a threaded hole that mates with the handle bar. Two flexible counterweight bases are respectively located at both ends of the handle bar.

[0015] Furthermore, the handle is provided with a sliding sleeve, and a transverse rib is provided on the handle. The sliding sleeve can be limited on the transverse rib to restrict the rotation of the sliding sleeve around the handle. The mounting position is provided with a socket or a protruding rib, and the sliding sleeve is provided with a protruding edge or a recess that cooperates with the socket or the protruding rib. The sliding sleeve is sleeved on the mounting position, the sliding sleeve is limited on the transverse rib, and the protruding edge or recess of the sliding sleeve engages with the socket or the protruding rib of the mounting position. The sliding sleeve restricts the relative rotation of the handle and the flexible counterweight.

[0016] Furthermore, the mounting position is surrounded by several sockets or ribs, and the protrusion or recess of the sliding sleeve can be limited to any socket or rib.

[0017] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0018] 1. This utility model features an independently designed flexible weight base with pre-installed mounting positions for external connections. Users can combine these features to create fitness equipment tailored to their specific needs. For example, by attaching a flexible weight base to one end of a handle, a barbell is formed; similarly, by attaching flexible weight bases to both ends of a handle, a dumbbell is formed; and by attaching a flexible weight base to the end of a handle, a kettlebell is formed. Users can also purchase flexible weight bases of varying weights to meet different fitness needs. The weight is contained within the flexible body, providing cushioning even if the body falls on the user, thus enhancing product safety.

[0019] 2. The injection channel of this utility model consists of a tightly connected flexible main body skirt and a positioning plug. The skirt covers the outer edge of the positioning plug, and the tight connection prevents air leakage between the positioning plug and the flexible main body. The positioning plug is made of rigid material, and the rigid material positioning plug can be directly sealed by the flexible plug. The flexible plug deforms inside the positioning plug and seals the injection channel. Furthermore, a blind hole is provided on the inner side of the plug, which provides space for the plug to deform inward. The annular convex edge deforms and forces the blind hole to shrink or partially close. Through the blind hole, the plug has an adaptable deformation interior, and the annular convex edge will tilt accordingly as it is pushed into the positioning plug. Due to the overall deformation of the plug and the tilted annular convex edge, the sealed plug is not easy to remove.

[0020] 3. This utility model has a sliding sleeve in the handle bar. The sliding sleeve locks the flexible counterweight and the handle bar, preventing relative rotation between them and thus locking them together to ensure stability during use. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the flexible counterweight seat of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of the flexible counterweight seat of this utility model;

[0023] Figure 3 yes Figure 2 A magnified structural diagram at point A;

[0024] Figure 4 yes Figure 2 A magnified structural diagram at point B;

[0025] Figure 5 This is a schematic diagram of the structure of the plug of this utility model;

[0026] Figure 6 This is a schematic diagram of the internal structure of the plug of this utility model;

[0027] Figure 7 This is one of the structural schematic diagrams of the dumbbell of this utility model;

[0028] Figure 8 This is a schematic diagram of the internal structure of the dumbbell of this utility model;

[0029] Figure 9 yes Figure 8 A magnified structural diagram at point C;

[0030] Figure 10 This is the second schematic diagram of the dumbbell structure of this utility model;

[0031] Figure 11 yes Figure 10 A magnified structural diagram at point D;

[0032] Figure 12 This is an exploded structural diagram of the dumbbell of this utility model;

[0033] Figure 13 yes Figure 12 A magnified structural diagram at point E.

[0034] In the diagram: 1-Flexible counterweight seat; 11-Support; 111-Mounting position; 112-Threaded hole; 113-Rib; 12-Flexible body; 121-Filling space; 122-Skirt; 123-Gap; 13-Positioning plug; 2-Plug; 21-Annular flange; 22-Blind hole; 3-Handle handle; 31-Threaded section; 32-Transverse rib; 4-Sliding sleeve; 41-First recess; 42-Second recess. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Figure 1-13 As shown:

[0036] A flexible counterweight base includes a flexible main body 12 and a support 11 that are fixed to each other or integrally formed. The two can be formed as a whole by a slush molding process, or by hot-melting in the same slush molding mold. Figure 4As shown, the flexible body 12 is a complete soft rubber unit. An injection channel is provided on the side of the flexible body 12. The flexible body 12 can only be connected outwards through the injection channel, which ensures the integrity of the inner cavity of the flexible body and helps to guarantee airtightness. Of course, the flexible body 12 and the support 11 can also be formed as a whole by secondary injection molding, glue connection, etc., as long as the connected flexible counterweight 1 remains stable. The filler can enter the filling space through the injection channel and can move within the filling space 121. The plug 2 can seal the injection channel and form a closed filling space 121. The inner cavity of the flexible body can be inflated, keeping the filling space in an expanded state. The filler does not completely fill the filling space; under the action of gravity, the filler remains at the lower end of the flexible body. It is not advisable to fill the interior completely with filler, as this will negate the de-flexibility effect; moreover, if there is too much filler, the flexible body may explode and break during de-inflation. The accompanying diagram does not indicate the filler material, which can be common counterweights such as sand, iron filings, rubber, or liquids. Manufacturers can fill the flexible body with different weights of filler material according to actual requirements.

[0037] The support 11 is made of rigid material, so it can be used to connect to the outside. At least one mounting position 111 is provided on the side of the support 11 away from the flexible body. Preferably, a mounting position 111 is provided in the middle of the support. The mounting position 111 is a built-in threaded hole 112. External components can be fixed on the mounting position and connected as a whole.

[0038] The injection channel includes a positioning plug 13, the middle of which forms the injection channel. A plug 2 can be installed in the injection channel. The positioning plug 13 is tightly connected to the flexible body 12 to form a whole. The positioning plug 13 has a higher hardness than the flexible body 12, which facilitates effective sealing of the plug 2. Preferably, the positioning plug 13 and the flexible body 12 are thermally fused together during manufacturing. The flexible body has an integrally formed skirt 122, which covers the outside of the positioning plug 13. The positioning plug 13 and the skirt 122 are tightly connected. The skirt 122 has an opening or gap 123, allowing filler and gas to pass through the positioning plug 13 and the skirt 122 into the inner cavity of the flexible body 12. The plug 2 is a flexible component with an annular protrusion 21 on its side. The plug enters the injection channel and is in a sealed state. The annular protrusion deforms and fits tightly against the inner wall of the injection channel. A blind hole 22 is provided on the inner side of the plug. The blind hole 22 provides space for the plug 2 to deform inward. The annular convex edge 21 deforms and forces the inner diameter of the blind hole to decrease or partially close. The diameter of the annular convex edge 21 is larger than that of the injection channel. When the plug 2 is pushed into the injection channel, the annular convex edge tilts in the direction of entry. The tilted annular convex edge has a better sealing effect and also prevents the plug from falling out of the injection channel.

[0039] A dumbbell includes the aforementioned flexible counterweight 1 and a handle 3. Both ends of the handle 3 are provided with threaded sections 31. The mounting position 111 of the flexible counterweight is a threaded hole 112 that mates with the handle. The two flexible counterweights 1 are respectively located at both ends of the handle 3.

[0040] The handle 3 is provided with a sliding sleeve 4, and a transverse rib 32 is provided on the handle 3. The sliding sleeve 4 can be limited on the transverse rib 32, thereby restricting the rotation of the sliding sleeve 4 around the handle 3. The sliding sleeve 4 is provided with a first recess 41 that cooperates with the transverse rib. Of course, the transverse rib can also be replaced with a transverse groove, as long as the rotation of the sliding sleeve can be restricted by the transverse rib or transverse groove provided on the handle 3, as shown in the attached figure. Figure 10-12 As shown, a transverse rib can be provided only at the end, or a single transverse rib can be provided running through the entire handle; the manufacturer can decide the specific configuration. A raised rib 113 is provided on the mounting position 111, and a second recess 42 that mates with the raised rib 113 is provided on the sliding sleeve 4. The sliding sleeve is fitted onto the mounting position 111, with the first recess 41 of the sliding sleeve 4 limiting its position on the transverse rib 32, and the second recess 42 engaging with the raised rib 113 of the mounting position. The sliding sleeve 4 restricts the relative rotation of the handle 3 and the flexible counterweight 1, thereby preventing the flexible counterweight 1 from detaching from the handle 3. Figure 10-12 As shown, the mounting position is surrounded by several raised ribs 113, and the sliding sleeve is provided with at least one matching second recess 42; alternatively, several insertion ports can be provided around the mounting position, and the sliding sleeve is provided with at least one matching protrusion, which can be tightly inserted into the insertion port, thereby achieving a fixed connection between the sliding sleeve and the mounting position.

[0041] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A flexible counterweight base, characterized in that: It includes a flexible main body (12) and a support (11) that are fixed to each other or integrally formed. The support (11) is made of rigid material. The side of the flexible main body is provided with an injection channel, which connects the inner cavity of the flexible main body to the outside. The filler can enter the filling space through the injection channel and can move within the filling space. The plug can seal the injection channel and form a closed filling space. The support (11) has at least one mounting position (111) on the side away from the flexible body (12), and the external component can be fixed on the mounting position (111) and connected as a whole.

2. The flexible counterweight base according to claim 1, characterized in that: The mounting position (111) is a built-in threaded hole; the flexible body (12) is a complete unit, and the flexible body (12) can only be connected to the outside through the injection channel.

3. The flexible counterweight seat according to claim 1 or 2, characterized in that: The cavity of the flexible body (12) can be inflated and the filling space can be kept in an expanded state. The filling material does not fill the filling space and is kept at the lower end of the flexible body (12) under the action of gravity.

4. The flexible counterweight seat according to claim 3, characterized in that: The injection channel includes a positioning plug (13), which has a channel for installing a plug (2) in the middle. The positioning plug (13) is tightly connected to the flexible body (12) to form an integral whole. The hardness of the positioning plug (13) is greater than that of the flexible body (12).

5. The flexible counterweight seat according to claim 4, characterized in that: The flexible body (12) is integrally formed with a skirt (122). The skirt (122) covers the outside of the positioning plug (13). The skirt (122) has an opening or gap (123). Filler and gas can pass through the positioning plug (13) and the skirt (122) into the inner cavity of the flexible body (12).

6. The flexible counterweight seat according to claim 1, 2, 4, or 5, characterized in that: The plug (2) is a flexible part. The side of the plug is provided with an annular protrusion (21). The plug (2) enters the injection channel and is in a sealed state. The annular protrusion deforms and fits tightly on the inner wall of the injection channel.

7. The flexible counterweight seat according to claim 6, characterized in that: The plug has a blind hole (22) on its inner side. The blind hole (22) provides space for the plug to deform inward. The annular convex edge deforms and forces the inner diameter of the blind hole to decrease or partially close. The diameter of the annular convex edge is larger than that of the injection channel. The plug is pushed into the injection channel and the annular convex edge tilts in the direction of entry.

8. A dumbbell, characterized in that: The flexible counterweight (1) as described in any one of claims 1, 2, 4, 5, 6 or 7 is further comprising a handle (3), both ends of which are provided with threaded sections (31), and the mounting position (111) of the flexible counterweight is a threaded hole (112) that mates with the handle (3); the two flexible counterweights (1) are located at the two ends of the handle (3) respectively.

9. The dumbbell according to claim 8, characterized in that: The handle (3) is provided with a sliding sleeve (4), and a transverse rib (32) is provided on the handle (3). The sliding sleeve (4) can be limited on the transverse rib (32) to restrict the sliding sleeve (4) from rotating around the handle (3). The mounting position is provided with a socket or a rib, and the sliding sleeve is provided with a protruding edge or a recess that cooperates with the socket or rib. The sliding sleeve is fitted onto the mounting position, the sliding sleeve is limited on the transverse rib, and the protruding edge or recess of the sliding sleeve engages with the socket or rib of the mounting position. The sliding sleeve (4) restricts the relative rotation of the handle (3) and the flexible counterweight.

10. The dumbbell according to claim 8, characterized in that: The mounting position (111) is surrounded by several sockets or ribs, and the protrusion or recess of the sliding sleeve (4) can be limited to any socket or rib.

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