Leg exerciser

Abstract

The utility model relates to a leg exerciser. The leg exerciser comprises a main body and two leg clamping pieces, wherein the two leg clamping pieces are rotatably mounted on the main body and can be folded and unfolded; the main body comprises a main body shell, a transmission piece which is arranged at the upper part in the main body shell and is in transmission connection with the two leg clamping pieces, and a resistance spring which is arranged at the lower part in the main body shell and is matched with the transmission piece in an abutting manner; when the two leg clamping pieces are folded, the transmission piece can be driven to move downwards to extrude the resistance spring, so that the resistance spring generates resistance; on the contrary, when the two leg clamping pieces are unfolded, the transmission piece can be driven to return upwards, and the resistance spring is promoted to return upwards. By adopting the structural mode that the leg clamping piece knob presses the transmission piece downwards so as to extrude the resistance spring to form resistance, a plurality of middle transmission links and parts can be saved, the structure is simple, the cost is low, installation and manufacturing are convenient, and the failure rate is low and the reliability is high in the using process.

Description

Technical Field

[0001] The utility model relates to the field of fitness equipment, in particular to a leg exerciser which can be clamped between two legs for use. Background Art

[0002] Chinese utility model patent CN219848027U discloses a beautiful leg clamp, which includes a main body and two leg clamps. The main body is provided with a transmission part and a resistance controller connected to the two leg clamps. The resistance controller includes a pull rod and a compression spring sleeved on the pull rod. A blocking section for blocking the compression spring is provided in the internal cavity of the main body. The top of the pull rod passes through the blocking section and is connected to the transmission part by bolts. The bottom of the pull rod passes through the internal cavity of the main body and is exposed outside the main body. A top block for squeezing the compression spring is provided on the bottom of the pull rod. The top block movably passes through the bottom wall of the internal cavity of the main body. When the leg clamp controls the transmission part to move upward by twisting and pulling (that is, when the two leg clamps are closed), the pull rod drives the top block to squeeze the compression spring. The compression spring generates resistance when it is subjected to the extrusion force formed by the top block and the blocking section, and transmits the resistance to the leg clamp.

[0003] Although this leg clamp solves the problem of asymmetric and skewed force in traditional torsion spring structure, it also has the following shortcomings in structural design:

[0004] 1) Since the compression spring is squeezed by pulling to generate resistance, an additional pull rod must be provided and connecting holes must be opened on the pull rod and the transmission member to connect them together through bolts. At the same time, an additional blocking section for blocking the compression spring must be provided in the internal cavity of the main body. This not only leads to a complex product structure, high cost, and inconvenient installation and manufacturing, but more importantly, due to the increase in intermediate transmission links, the product is easily damaged during use and has a high failure rate.

[0005] 2) As the pull rod drives the top block to squeeze the compression spring upward or return downward, the top block shuttles through the bottom wall perforation of the internal cavity of the main body, so the verticality of the pull rod must always be ensured. This places high demands on the installation accuracy and manufacturing accuracy of the product. Otherwise, the top block will be stopped by the friction of the hole wall of the bottom wall perforation, which will easily have a negative impact on the normal retraction and expansion of the two leg clamps on the one hand, and on the other hand, it will also be prone to wear, which will increase the gap between the bottom wall perforations and allow external dust to enter. Utility Model Content

[0006] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a leg exerciser with a more rational structural design, which is not only simple in structure and low in cost, but also has a low failure rate and high reliability.

[0007] The purpose of this utility model is achieved through the following technical solutions:

[0008] A leg exerciser comprises a main body and two leg clamps rotatably mounted on the main body and capable of being folded and unfolded; the main body comprises a main body shell, a transmission member arranged at the upper inner portion of the main body shell and transmission-connected to the two leg clamps, and a resistance spring arranged at the lower inner portion of the main body shell and abutting against the transmission member; when the two leg clamps are folded, they can drive the transmission member to move downward and thereby squeeze the resistance spring, causing the resistance spring to generate resistance; conversely, when the two leg clamps are unfolded, they can drive the transmission member to return upward and cause the resistance spring to reset upward.

[0009] Furthermore, the two sides of the transmission member are respectively connected to the two leg clamps through a transmission structure, and the transmission structure includes a transmission groove and a transmission shaft extending into the transmission groove and slidingly engaging with the transmission groove, and the transmission groove is arranged on one of the transmission member and the leg clamp, and the transmission shaft is arranged on the other of the transmission member and the leg clamp. When the two leg clamps are folded or unfolded, the transmission member is driven to move downward or upward through the sliding engagement between the transmission shaft and the transmission groove.

[0010] Furthermore, a transmission groove is provided on each of the left and right sides of the transmission member, and the transmission groove is a horizontal sliding groove extending along the left and right directions. The two leg clamps are respectively provided with a transmission shaft extending into the corresponding transmission groove. When the two leg clamps are folded or unfolded, the transmission shaft slides in the corresponding transmission groove, thereby driving the transmission member to move downward or upward.

[0011] Furthermore, a stop pad is provided in the lower part of the main body shell, which is cooperated with the lower end of the resistance spring. A threaded through hole is provided on the bottom wall of the main body shell, and an adjusting screw is threaded in the threaded through hole. The upper end of the adjusting screw extends into the main body shell and is connected to the stop pad. The lower end of the adjusting screw is exposed below the main body shell, and the exposed lower end of the adjusting screw is provided with a hand grip for the user to conveniently screw the adjusting screw.

[0012] Furthermore, the two leg clamps each include a clamp arm, a leg-supporting portion provided at one end of the clamp arm, and a pivot portion provided at the other end of the clamp arm. The two leg clamps are rotatably mounted on the main body shell via their pivot portions.

[0013] Furthermore, the upper end of the main body shell is provided with a pivot extending in the front-to-back direction and passing through the transmission member, and the pivotal parts of the two leg clamps are pivoted to the front and rear ends of the pivot respectively. The transmission member is provided with a vertical slide groove for the pivot to pass through and extending in the up-down direction. When the transmission member moves downward or upward, the vertical slide groove slides downward or upward relative to the pivot.

[0014] Furthermore, the front and rear ends of the pivot are exposed from the main body shell, and the pivotal parts of the two leg clamps are respectively provided with a stepped through hole for pivoting with the front and rear ends of the pivot, each stepped through hole includes a small hole located on the inner side and a large hole located on the outer side, the small hole of each stepped through hole is clearance-matched with the outer cylindrical surface of the pivot, and a bearing is installed in the large hole of each stepped through hole to contact and match with the outer cylindrical surface of the pivot.

[0015] Furthermore, the front and rear ends of the pivot are respectively provided with a stopper located on the outside of the corresponding bearing to prevent the bearing from falling out of the large hole, wherein the stopper at one end is a hexagonal cap head integrally formed with the pivot, and the stopper at the other end is a hexagonal nut threadedly connected to the pivot.

[0016] Furthermore, each stepped through hole is provided with a decorative cover on the outer side of the large hole for covering the stopper, or a decorative sticker is attached to the outer end surface of the large hole of each stepped through hole for covering the large hole.

[0017] Furthermore, the pivotal portions of the two leg clamps are in contact with each other, and a contact recess is provided on the contact surface of the pivotal portion of one leg clamp, and a contact protrusion matched with the contact recess is provided on the contact surface of the pivotal portion of the other leg clamp.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention changes the structural method in the prior art in which the leg clamps are twisted to pull and squeeze the compression spring to form resistance into a structural method in which the leg clamps are twisted to press and squeeze the resistance spring to form resistance, that is, the structural method of "when the two leg clamps are folded, they can drive the transmission part to move downward and then squeeze the resistance spring, so that the resistance spring generates resistance" is adopted. On the one hand, the intermediate transmission links are reduced, making it not only simple in structure, low in cost, and easy to install and manufacture, but also making the product not easy to be damaged during use and having a low failure rate. On the other hand, when the resistance spring generates resistance against the downward displacement of the transmission part, the stop component (that is, the stop pad) at the lower end of the resistance spring does not need to follow the movement, thereby avoiding the possibility of friction between the stop component and the main body shell, thereby ensuring the reliability of the product during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional diagram of the final assembly of a leg exerciser of the present invention.

[0021] Figure 2 It is a cutaway perspective view of a leg exerciser of the present invention.

[0022] Figure 3 The utility model is a transverse cross-sectional schematic diagram of a leg exerciser.

[0023] Figure 4 It is a three-dimensional diagram of the transmission member described in the present utility model.

[0024] Figure 5 It is a longitudinal sectional schematic diagram of a leg exerciser of the present invention.

[0025] Figure 6 yes Figure 5 A partial enlarged schematic diagram of the middle A.

[0026] Figure 7 This is a three-dimensional view from the inside of one of the leg clamps of the present invention. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the embodiments given in the accompanying drawings.

[0028] like Figures 1 to 7 As shown, the present invention provides a leg exerciser, which includes a main body 1 and two leg clamps 2 rotatably mounted on the main body 1 and capable of being folded and unfolded.

[0029] The main body 1 includes a main body shell 11, a transmission member 12 arranged at the upper inner part of the main body shell 11 and connected to the two leg clamps 2, and a resistance spring 13 arranged at the lower inner part of the main body shell 11 and abutting against the transmission member 12. The abutting cooperation between the resistance spring 13 and the transmission member 12 can be direct contact and abutting cooperation between the two, or an indirect abutting cooperation can be added with a contact member between the two.

[0030] When the two leg clamps 2 are folded, they can drive the transmission member 12 to move downward and then squeeze the resistance spring 13, causing the resistance spring 13 to generate resistance, that is, generate resistance to the folding of the two leg clamps 2, so that when the leg exerciser of the present invention is clamped between the human legs to perform a clamping action, the purpose of contracting the muscles can be achieved; conversely, when the two leg clamps 2 are unfolded, they can drive the transmission member 12 to return to its position upward and prompt the resistance spring 13 to reset upward, so that when the leg exerciser of the present invention is clamped between the human legs to perform a loosening action, the purpose of relaxing the muscles can be achieved.

[0031] The two sides of the transmission member 12 are respectively connected to the two leg clamps 2 through a transmission structure 3. The transmission structure 3 includes a transmission groove 31 and a transmission shaft 32 that extends into the transmission groove 31 and slides with it. The transmission groove 31 is set on one of the transmission member 12 and the leg clamp 2, and the transmission shaft 32 is set on the other of the transmission member 12 and the leg clamp 2. When the two leg clamps 2 are folded or unfolded, the transmission member 12 is driven to move downward or upward through the sliding cooperation between the transmission shaft 32 and the transmission groove 31.

[0032] In a preferred example of the present invention, a transmission groove 31 is respectively provided on the left and right sides of the transmission member 12, and the transmission groove 31 is a horizontal sliding groove extending along the left and right directions. The two leg clamps 2 are respectively provided with a transmission shaft 32 extending into the corresponding transmission groove 31. When the two leg clamps 2 are folded or unfolded, the transmission shaft 32 slides in the corresponding transmission groove 31, thereby driving the transmission member 12 to move downward or upward.

[0033] A stop block 14 is further provided at the lower portion of the main body shell 11 to abut against the lower end of the resistance spring 13. The stop block 14 stops the lower end of the resistance spring 13, so that the downward displacement of the transmission member 12 can squeeze the resistance spring 13, causing it to be compressed and generate resistance. A threaded through hole 110 is provided on the bottom wall of the main body shell 11. An adjusting screw 15 is threadedly connected to the threaded through hole 110. The upper end of the adjusting screw 15 extends into the main body shell 11 and is fixedly connected to the stop block 14. The lower end of the adjusting screw 15 is exposed below the main body shell 11. The exposed lower end of the adjusting screw 15 is provided with a hand grip 150 for convenient user operation of screwing the adjusting screw 15. When in use, the adjusting screw 15 can be screwed by the hand grip 150 to adjust the upper and lower positions of the stop block 14, thereby adjusting the resistance of the resistance spring 13.

[0034] Each of the two leg clamps 2 includes a clamp arm 21, a leg-supporting portion 23 provided at one end of the clamp arm 21, and a pivot portion 22 provided at the other end of the clamp arm 21. The two leg clamps 2 are rotatably mounted to the main body shell 11 via their pivot portions 22. Furthermore, the pivot portions 22 of the two leg clamps 2 are each provided with an insertion hole 221 for inserting the corresponding transmission shaft 32.

[0035] The upper end of the main body shell 11 is provided with a pivot 111 extending in the front-to-back direction and passing through the transmission member 12. The pivot parts 22 of the two leg clamps 2 are respectively pivoted to the front and rear ends of the pivot 111. The transmission member 12 is provided with a vertical slide groove 121 for the pivot 111 to pass through and extending in the up-down direction. When the transmission member 12 moves downward or upward, the vertical slide groove 121 slides downward or upward relative to the pivot 111, thereby avoiding the pivot 111 on the one hand and providing a sliding guide function for the up-and-down displacement of the transmission member 12 on the other hand.

[0036] The front and rear ends of the pivot 111 are exposed from the main body shell 11, and the pivotal parts 22 of the two leg clamps 2 are respectively provided with a stepped through hole 222 for pivoting with the front and rear ends of the pivot 111. Each stepped through hole 222 includes a small hole 2221 located on the inner side and a large hole 2222 located on the outer side. The small hole 2221 of each stepped through hole 222 is clearance-matched with the outer cylindrical surface of the pivot 111, and a bearing 4 is installed in the large hole 2222 of each stepped through hole 222, which is in contact with the outer cylindrical surface of the pivot 111. The bearing 4 can ensure that the two leg clamps 2 can rotate more smoothly relative to the main body shell 11.

[0037] The front and rear ends of the pivot 111 are each provided with a stopper 5 positioned outside the corresponding bearing 4 to prevent the bearing 4 from slipping out of the large hole 2222. The stopper 5 on one end is a hexagonal cap integrally formed with the pivot 111, while the stopper 5 on the other end is a hexagonal nut threadedly connected to the pivot 111. Furthermore, a decorative cover 6 is provided on the outer side of the large hole 2222 of each stepped through hole 222 to conceal the stopper. Alternatively, in another embodiment of the present invention, a decorative sticker may be affixed to the outer end surface of the large hole 2222 of each stepped through hole 222 to conceal the large hole 2222.

[0038] The pivotal portions 22 of the two leg clamps 2 are in contact with each other, and a contact recess 223 is provided on the contact surface of the pivotal portion 22 of one leg clamp 2 , and a contact protrusion 224 matched with the contact recess 223 is provided on the contact surface of the pivotal portion 22 of the other leg clamp 2 .

[0039] The above description is only a preferred embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. In other words, simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the utility model description are still within the scope of the present utility model patent.

Claims

1. A leg exerciser comprising a main body and two leg clamps rotatably mounted on the main body and capable of being folded and unfolded; characterized in that: The main body includes a main body shell, a transmission member arranged at the upper part of the main body shell and connected to the two leg clamps, and a resistance spring arranged at the lower part of the main body shell and abutting against the transmission member. When the two leg clamps are folded together, they can drive the transmission member to move downward and then squeeze the resistance spring, causing the resistance spring to generate resistance; On the contrary, when the two leg clamps are unfolded, they can drive the transmission member to return upward and prompt the resistance spring to reset upward.

2. A leg exerciser according to claim 1, characterized in that: The two sides of the transmission member are respectively connected to the two leg clamps through a transmission structure, and the transmission structure includes a transmission groove and a transmission shaft extending into the transmission groove and slidingly cooperating with the transmission groove. The transmission groove is arranged on one of the transmission member and the leg clamp, and the transmission shaft is arranged on the other of the transmission member and the leg clamp. When the two leg clamps are folded or unfolded, the transmission member is driven to move downward or upward through the sliding cooperation between the transmission shaft and the transmission groove.

3. A leg exerciser according to claim 2, characterized in that: A transmission groove is respectively provided on the left and right sides of the transmission member, and the transmission groove is a horizontal sliding groove extending along the left and right directions. The two leg clamps are respectively provided with a transmission shaft extending into the corresponding transmission groove. When the two leg clamps are folded or unfolded, the transmission shaft slides in the corresponding transmission groove, thereby driving the transmission member to move downward or upward.

4. The leg exerciser according to claim 1, characterized in that: The lower part of the main body shell is also provided with a stop pad that cooperates with the lower end of the resistance spring. A threaded through hole is penetrated on the bottom wall of the main body shell, and an adjusting screw is threaded into the threaded through hole. The upper end of the adjusting screw extends into the main body shell and is connected with the stop pad. The lower end of the adjusting screw is exposed below the main body shell, and the exposed lower end of the adjusting screw is provided with a hand grip for the user to conveniently screw the adjusting screw.

5. The leg exerciser according to claim 1, characterized in that: The two leg clamps each include a clamp arm, a leg-supporting portion at one end of the clamp arm, and a pivot portion at the other end of the clamp arm. The two leg clamps are rotatably mounted on the main body shell via their pivot portions.

6. The leg exerciser according to claim 5, characterized in that: The upper end of the main body shell is provided with a pivot extending in the front-to-back direction and passing through the transmission member. The pivot joints of the two leg clamps are respectively pivoted to the front and rear ends of the pivot. The transmission member is provided with a vertical slide groove for the pivot to pass through and extending in the up-down direction. When the transmission member moves downward or upward, the vertical slide groove slides downward or upward relative to the pivot.

7. The leg exerciser according to claim 6, characterized in that: The front and rear ends of the pivot are exposed from the main body shell, and the pivotal parts of the two leg clamps are respectively provided with a stepped through hole for pivoting with the front and rear ends of the pivot. Each stepped through hole includes a small hole located on the inner side and a large hole located on the outer side. The small hole of each stepped through hole is clearance-matched with the outer cylindrical surface of the pivot, and a bearing is installed in the large hole of each stepped through hole to contact and match with the outer cylindrical surface of the pivot.

8. The leg exerciser according to claim 7, characterized in that: The front and rear ends of the pivot are respectively provided with a stopper located on the outside of the corresponding bearing to prevent the bearing from falling out of the large hole. The stopper at one end is a hexagonal cap head integrally formed with the pivot, and the stopper at the other end is a hexagonal nut threadedly connected to the pivot.

9. The leg exerciser according to claim 8, characterized in that: The outer side of the large hole of each stepped through hole is provided with a decorative cover for covering the stopper, or the outer end surface of the large hole of each stepped through hole is provided with a decorative sticker for covering the large hole.

10. A leg exerciser according to claim 5, 6, 7, 8 or 9, characterized in that: The pivotal parts of the two leg clamps are in contact with each other, and a contact recess is provided on the contact surface of the pivotal part of one leg clamp, and a contact protrusion matched with the contact recess is provided on the contact surface of the pivotal part of the other leg clamp.

Images