Replaceable chest expander

Abstract

The utility model relates to a replaceable chest expander which comprises an elastic band and two handles, the two handles are arranged at the two ends of the elastic band respectively and connected with the elastic band through bushings, the bushings are movably arranged on the outer side of the elastic band in a sleeved mode and detachably connected with the elastic band through screws, and a step hole for the bushings to enter is formed in each handle. A step hole is formed in the handle, a limiting step face is arranged in the middle of the step hole, an elastic buckle is arranged on the lining, the lining is inserted into the step hole, a limiting protrusion of the elastic buckle extends to the outer side of the step hole, and the lining and the handle are relatively fixed through matching of the limiting step face and the limiting protrusion; according to the replaceable chest expander, the ends of the elastic bands are detachably connected with the handles through the bushings, people can select the elastic bands with proper hardness and length to be assembled with the handles according to requirements, only the elastic bands need to be replaced when the elastic bands are damaged, the use cost is low, and operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment technology, and in particular to a replaceable resistance band. Background Technology

[0002] Resistance bands are essential fitness equipment for shaping the body because they can effectively improve muscle lines and contours, increase muscle definition, and effectively train arm and chest muscles.

[0003] Existing resistance bands typically only offer a single hardness and length, which cannot meet the needs of people of different genders, ages, or rehabilitation stages for different hardness and lengths. Furthermore, after a period of use, the elasticity of the resistance bands weakens, requiring the entire resistance band to be discarded and replaced with a new one, which undoubtedly increases the cost of use.

[0004] Therefore, this utility model proposes a replaceable tensioner to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a replaceable tensioner that allows for the replacement of tension bands as needed, and is easy to operate.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a replaceable tensioner, the innovation of which is: it includes an elastic band and two handles, the two handles are respectively set at both ends of the elastic band and connected to the elastic band through bushings;

[0007] The bushing is movably fitted onto the outside of the elastic band and is detachably connected to the elastic band by screws. The handle has a stepped hole for the bushing to enter. The stepped hole has a limiting stepped surface in the middle. The bushing is provided with an elastic buckle. The elastic buckle tilts and rises away from the connection point with the bushing in the direction away from the elastic band. The tilted end of the elastic buckle extends away from the elastic band to form a limiting protrusion. The bushing is inserted into the stepped hole, and the limiting protrusion of the elastic buckle extends to the outside of the stepped hole. The bushing and the handle are relatively fixed by the cooperation of the limiting stepped surface and the limiting protrusion.

[0008] Furthermore, the bushing is provided with an expanding section and a reducing section in sequence along the axial direction. The expanding section is located on the side of the reducing section away from the elastic band. The expanding section and the reducing section cooperate to form a stepped structure that matches the stepped hole. The reducing section has a clearance groove that accommodates the elastic buckle and allows the elastic buckle to deform. The elastic buckle is set in the clearance groove and connected to the end face of the expanding section near the reducing section.

[0009] Furthermore, the elastic buckle, the expanded diameter section, and the reduced diameter section are integrally formed.

[0010] Furthermore, the sidewall of the expanded section is inclined from the side closest to the reduced section toward the direction away from the bushing's central axis.

[0011] Furthermore, the elastic buckle has two buckles that are symmetrically arranged on both sides of the elastic band.

[0012] Furthermore, the bushing has a split structure, including an upper half and a lower half, with a mounting groove for installing an elastic band formed between the upper half and the lower half. The upper half and the lower half are connected by screws, and the elastic band is fixed in the mounting groove.

[0013] Furthermore, the upper and lower half of the body each have a number of screw mounting posts in their mounting grooves. The screw mounting posts of the upper half and the lower half of the body correspond one-to-one and cooperate to form a number of first positioning posts. The elastic band has a number of first positioning holes for the first positioning posts to pass through. The elastic band is set in the mounting groove, and the number of first positioning posts are respectively inserted into the corresponding first positioning holes. The screw mounting posts of the upper half of the body have screw through holes for screws to pass through, and the screw mounting posts of the lower half of the body have threaded holes that match the screws. The screws pass through the screw through holes and are threaded into the threaded holes. By tightening the screws, the elastic band is clamped between the upper and lower half of the body.

[0014] Furthermore, the lower half of the sleeve is provided with a second positioning post in the mounting groove, and the elastic band is provided with a second positioning hole for the second positioning post to pass through. The upper half of the sleeve is provided with a sleeve positioning hole for the second positioning post to pass through, and the second positioning post passes through the second positioning hole of the elastic band and enters the sleeve positioning hole of the upper half of the sleeve.

[0015] Furthermore, the end of the elastic band has a reinforced expanded diameter end, and the first positioning hole and the second positioning hole are formed on the reinforced expanded diameter end.

[0016] Furthermore, a positioning protrusion extends outward in the radial direction on the outer wall of the bushing, and an opening is provided on the handle for the positioning protrusion to enter as the bushing moves. When the bushing is inserted into the stepped hole, the positioning protrusion enters the opening.

[0017] The advantages of this utility model are:

[0018] The two ends of the elastic band of this utility model are detachably connected to the handle through bushings. People can choose the appropriate hardness and length of elastic band and handle to assemble according to their needs. When the elastic band is damaged, only the elastic band needs to be replaced, which is low in cost. When replacing the elastic band, simply press the elastic buckle, push the bushing away from the stepped hole, and unscrew the screw to replace the elastic band. The operation is convenient.

[0019] The bushing of this utility model utilizes a reduced diameter section to block the elastic band from the handle, avoiding direct contact between the elastic band and the handle and causing wear. Furthermore, by opening an avoidance groove with an elastic buckle on the reduced diameter section, the elastic buckle is set in the avoidance groove, which can effectively reduce the radial dimension of the bushing, thereby making the structure more compact.

[0020] The elastic buckle, the expanded diameter section, and the reduced diameter section of this utility model are integrally molded, resulting in a bushing structure with high strength, easy manufacturing, and low cost.

[0021] The sidewall of the expanded section of this invention is inclined from the side closest to the reduced section toward the direction away from the central axis of the bushing, which can effectively increase the stress surface of the bushing when the elastic band is stretched, reduce the probability of bushing deformation, and improve the service life of the tensioner.

[0022] The elastic buckle of this utility model has two symmetrically arranged on both sides of the elastic band. This design enhances the connection strength between the bushing and the handle on the one hand, and makes it convenient for people to press the two elastic buckles at the same time to unlock the bushing and the handle on the other hand.

[0023] The bushing of this utility model is designed as a split structure. When assembling the elastic band, simply fasten the two halves onto the two sides of the elastic band and then install the screws. The operation is convenient.

[0024] This utility model, by setting a first positioning post, achieves relative positioning and axial limiting between the elastic band and the bushing on the one hand, and facilitates the installation of screws on the other hand, preventing the screws from contacting the elastic band and avoiding wear on the elastic band caused by the screws.

[0025] This utility model, by setting a second positioning post, strengthens the relative positioning and axial limiting between the elastic band and the bushing. On the other hand, the second positioning post can be used to position the upper half of the body when assembling it, so that the screw through hole on the upper half of the body can be accurately aligned with the threaded hole on the lower half of the body, thus facilitating screw installation.

[0026] This invention enhances the connection strength between the elastic band and the bushing by designing the end of the elastic band as a reinforced and enlarged end, and by opening the first positioning hole and the second positioning hole on the reinforced and enlarged end. At the same time, it improves the deformation resistance of the end of the elastic band and extends its service life.

[0027] This invention provides a positioning protrusion on the outside of the bushing. When the bushing is inserted into the stepped hole, the positioning protrusion enters the opening, thereby achieving relative positioning between the bushing and the handle and avoiding relative twisting between the elastic band and the handle during assembly. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 This is a structural schematic diagram of the replaceable tensioner of this utility model.

[0030] Figure 2 This is a schematic diagram of the handle of this utility model.

[0031] Figure 3 This is a schematic diagram of the bushing structure of this utility model.

[0032] Figure 4 This is a schematic diagram of the lower half of the body of this utility model.

[0033] Figure 5 This is a schematic diagram of the upper half of the present invention.

[0034] Figure 6 This is a schematic diagram of the elastic band of this utility model.

[0035] Figure 7 This is a schematic diagram showing the connection between the elastic band and the bushing of this utility model.

[0036] Figure 8 This is a schematic diagram showing the connection between the elastic band, bushing, and handle of this utility model. Detailed Implementation

[0037] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0038] Example

[0039] This embodiment provides a replaceable tensioner, such as... Figure 1-8 As shown, the device includes an elastic band 3 and two handles 1. The two handles 1 are respectively located at both ends of the elastic band 3 and connected to the elastic band 3 via bushings 2. The bushings 2 are movably fitted onto the outside of the elastic band 3 and are detachably connected to the elastic band 3 via screws 4. A stepped hole 101 is provided on the handle 1 for the bushing 2 to enter. The stepped hole 101 has a limiting stepped surface in the middle. The bushing 2 is provided with an elastic buckle 2c. The elastic buckle 2c tilts upwards from its connection point with the bushing 2 in a direction away from the elastic band 3. The tilted end of the elastic buckle 2c extends away from the elastic band 3 to form a limiting protrusion 2c1. The bushing 2 is inserted into the stepped hole 101, and the limiting protrusion 2c1 of the elastic buckle 2c extends to the outside of the stepped hole 101. The limiting stepped surface and the limiting protrusion 2c1 cooperate to fix the bushing 2 and the handle 1 relatively.

[0040] like Figure 3As shown, the bushing 2 has an expanding section 2a and a reducing section 2b sequentially along the axial direction. The expanding section 2a is located on the side of the reducing section 2b away from the elastic band 3. The expanding section 2a and the reducing section 2b cooperate to form a stepped structure that matches the stepped hole 101. The reducing section 2b has a clearance groove to accommodate the elastic buckle 2c and allow the elastic buckle 2c to deform. The elastic buckle 2c is disposed in the clearance groove and is connected to the end face of the expanding section 2a near the reducing section 2b. The design of the reducing section 2b can block the elastic band 3 from contacting the handle 1, avoiding wear caused by direct contact between the elastic band 3 and the handle 1. Furthermore, by opening the clearance groove for the elastic buckle 2c on the reducing section 2b, the radial dimension of the bushing 2 can be effectively reduced, thus making the structure more compact.

[0041] In this embodiment, the bushing 2 is made of plastic, and the elastic buckle 2c, the expanding section 2a, and the narrowing section 2b are integrally molded, resulting in high structural strength, ease of manufacturing, and low cost. The sidewall of the expanding section 2a slopes away from the central axis of the bushing 2 from the side closest to the narrowing section 2b. This effectively increases the stress-bearing surface of the bushing 2 when the elastic band 3 is stretched, reducing the probability of deformation and extending the service life of the tensioner. Two elastic buckles 2c are symmetrically arranged on both sides of the elastic band 3, enhancing the connection strength between the bushing 2 and the handle 1, and allowing users to simultaneously press both elastic buckles 2c to unlock the bushing 2 and the handle 1.

[0042] In this embodiment, the bushing 2 has a split structure, including an upper half 21 and a lower half 22. An installation groove for installing the elastic band 3 is formed between the upper half 21 and the lower half 22. The upper half 21 and the lower half 22 are connected by two screws 4, and the elastic band 3 is fixed in the installation groove.

[0043] like Figure 3-5 As shown, each of the mounting slots of the upper half-body 21 and the lower half-body 22 is provided with two screw mounting posts. The screw mounting posts 21d of the upper half-body 21 and the screw mounting posts 22d of the lower half-body 22 correspond one-to-one and cooperate to form two first positioning posts 2d. The elastic band 3 has two first positioning holes 301 for the first positioning posts 2d to pass through. The mounting slot of the lower half-body 22 is provided with a second positioning post 2e. The second positioning post 2e is located between the two screw mounting posts 22d. The elastic band 3 has a second positioning hole 302 for the second positioning post 2e to pass through. The upper half-body 21 has a sleeve positioning hole 2101 for the second positioning post 2e to pass through.

[0044] During installation, the elastic band 3 is placed in the mounting groove between the upper half-body 21 and the lower half-body 22. The second positioning post 2e passes through the second positioning hole 302 of the elastic band 3 and enters the body positioning hole 2101 of the upper half-body 21. The two first positioning posts 2d are respectively inserted into the corresponding first positioning holes 301. The screw mounting post 21d of the upper half-body 31 has a screw through hole for the screw 4 to pass through. The screw mounting post 22d of the lower half-body 22 has a threaded hole that matches the screw 4. The screw 4 passes through the screw through hole and is threaded into the threaded hole. By tightening the screw 4, the elastic band 3 is clamped between the upper half-body 21 and the lower half-body 22.

[0045] The first positioning post 2d serves two purposes: firstly, it provides relative positioning and axial limiting between the elastic band 3 and the bushing 2; secondly, it facilitates the installation of the screw 4 and prevents the screw 4 from wearing off the elastic band 3. The design of the second positioning post 2e strengthens the relative positioning and axial limiting between the elastic band 3 and the bushing 2. Furthermore, the second positioning post 2e allows for positioning of the upper half of the body 21 during assembly, ensuring that the screw through holes on the upper half of the body 21 are precisely aligned with the threaded holes on the lower half of the body 22, thus facilitating the installation of the screw 4.

[0046] In this embodiment, the end of the elastic band 3 has a reinforced expanded diameter end 3a. The first positioning hole 301 and the second positioning hole 302 are opened on the reinforced expanded diameter end 3a to enhance the connection strength between the elastic band 3 and the bushing 2, and at the same time improve the deformation resistance of the end of the elastic band 3 and extend its service life.

[0047] In this embodiment, a positioning protrusion 2f extends radially outward on the outer side wall of the lower half of the bushing 2, extending from the expanding section to the contracting section of the lower half of the bushing 2. An opening 102 is provided on the handle 1 for the positioning protrusion 2f to enter as the bushing 2 moves. When the bushing 2 is inserted into the stepped hole 101, the positioning protrusion 2f enters the opening 102, achieving relative positioning between the bushing 2 and the handle 1, thus preventing relative twisting between the elastic band 3 and the handle 1 during assembly.

[0048] When replacing the tension band in a replaceable tensioner, first pinch and press the two elastic clips 2c inwards to push the bushing 2 out of the step hole 101 of the handle 1 away from the elastic band 3. Remove the two screws 4, and the upper half 21 and lower half 22 of the bushing 2 will separate away from the elastic band to be replaced. Pull the elastic band to be replaced out of the step hole 101 to complete the disassembly. When installing a new elastic band, pass the new elastic band through the step hole 101 of the handle 1, and then place the end of the new elastic band into the mounting groove of the lower half 22, so that the screws of the lower half 22 are installed. Post 22d enters the first positioning hole 301 of the elastic band, and the second positioning post 2e enters the second positioning hole 302 of the elastic band. The upper half of the sleeve 21 is fastened, and the two screws 4 are tightened. The connection between the elastic band and the bushing is completed. Pull the elastic band so that the bushing 2 enters the stepped hole 101. The elastic buckle 2c on the bushing 2 deforms inward under the pressure of the wall of the handle 1 and enters the stepped hole 101. After that, it passes out of the stepped hole 101. The elastic buckle 2c rebounds and cancels the deformation. The limiting protrusion 2c1 of the elastic buckle 2c abuts against the end face of the handle 1, completing the assembly of the bushing and the handle 1. The replacement of the elastic band is completed.

[0049] The elastic band of the replaceable tensioner is detachably connected to the handle via a bushing. Users can choose the appropriate hardness and length of elastic band to assemble with the handle according to their needs. When the elastic band is damaged, only the elastic band needs to be replaced. It has low operating costs and is easy to operate.

[0050] 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 modifications or alterations 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 alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A replaceable tensioner, characterized in that: It includes an elastic band and two handles, with the two handles respectively located at both ends of the elastic band and connected to the elastic band through bushings; The bushing is movably fitted onto the outside of the elastic band and is detachably connected to the elastic band by screws. The handle has a stepped hole for the bushing to enter. The stepped hole has a limiting stepped surface in the middle. The bushing is provided with an elastic buckle. The elastic buckle tilts and rises away from the connection point with the bushing in the direction away from the elastic band. The tilted end of the elastic buckle extends away from the elastic band to form a limiting protrusion. The bushing is inserted into the stepped hole, and the limiting protrusion of the elastic buckle extends to the outside of the stepped hole. The bushing and the handle are relatively fixed by the cooperation of the limiting stepped surface and the limiting protrusion.

2. The replaceable tensioner according to claim 1, characterized in that: The bushing is provided with an expanding section and a reducing section in sequence along the axial direction. The expanding section is located on the side of the reducing section away from the elastic band. The expanding section and the reducing section cooperate to form a stepped structure that matches the stepped hole. The reducing section has a clearance groove to accommodate the elastic buckle and allow the elastic buckle to deform. The elastic buckle is set in the clearance groove and connected to the end face of the expanding section near the reducing section.

3. The replaceable tensioner according to claim 2, characterized in that: The elastic buckle, the expanded diameter section, and the reduced diameter section are integrally formed.

4. The replaceable tensioner according to claim 2, characterized in that: The sidewall of the expanded section slopes away from the bushing centerline from the side closest to the reduced section.

5. The replaceable tensioner according to claim 1, characterized in that: The elastic buckle has two buckles, which are symmetrically arranged on both sides of the elastic band.

6. The replaceable tensioner according to claim 1, characterized in that: The bushing has a split structure, including an upper half and a lower half, with a mounting groove for installing an elastic band formed between the upper half and the lower half. The upper half and the lower half are connected by screws, and the elastic band is fixed in the mounting groove.

7. The replaceable tensioner according to claim 6, characterized in that: The upper and lower halves of the body each have a number of screw mounting posts in their mounting grooves. The screw mounting posts of the upper half and the lower half correspond one-to-one and cooperate to form a number of first positioning posts. The elastic band has a number of first positioning holes for the first positioning posts to pass through. The elastic band is set in the mounting groove, and the number of first positioning posts are respectively inserted into the corresponding first positioning holes. The screw mounting posts of the upper half have screw through holes for screws to pass through, and the screw mounting posts of the lower half have threaded holes that match the screws. The screws pass through the screw through holes and are threaded into the threaded holes. By tightening the screws, the elastic band is clamped between the upper and lower halves of the body.

8. The replaceable tensioner according to claim 7, characterized in that: The lower half of the sleeve is provided with a second positioning post in the mounting groove, and the elastic band has a second positioning hole for the second positioning post to pass through. The upper half of the sleeve has a sleeve positioning hole for the second positioning post to pass through, and the second positioning post passes through the second positioning hole of the elastic band and enters the sleeve positioning hole of the upper half of the sleeve.

9. The replaceable tensioner according to claim 8, characterized in that: The elastic band has a reinforced enlarged end, and a first positioning hole and a second positioning hole are formed on the reinforced enlarged end.

10. The replaceable tensioner according to claim 1, characterized in that: A positioning protrusion extends radially outward on the outer wall of the bushing. An opening is provided on the handle for the positioning protrusion to enter as the bushing moves. When the bushing is inserted into the stepped hole, the positioning protrusion enters the opening.

Images