Leg Exerciser

Abstract

The present invention discloses a leg exerciser, comprising a main body and two leg rests; the leg rests comprise a support arm and a leg rest mounted on the support arm; the main body comprises a driving rod, a spring and a limiting portion; the upper end of the driving rod is connected to the support arm through a connecting rod assembly, and the spring is sleeved outside the driving rod; the limiting portion is connected to the lower end of the driving rod and supports the lower end of the spring; the upper end of the spring is restricted and positioned; in an initial state, the two leg rests are opened and the spring is in an extended state; the two leg rests are clamped toward each other, and the rotating support arm pulls the driving rod upward through the connecting rod assembly, thereby causing the lower end of the spring to be squeezed upward by the limiting portion, so that the spring is in a compressed state; the driving rod is moved up and down to further compress the ordinary spring to provide tension to the leg exerciser, and the structure is relatively simple and the stability is high.

Description

Technical Field

[0001] The invention relates to a portable fitness device, in particular to a leg exerciser which is clamped between two legs to perform opening and closing actions repeatedly to achieve the effect of beautifying legs and shaping buttocks. Background Art

[0002] Leg exercisers, also known as leg beautifying machines, are clamped between the legs and perform repeated opening and closing movements to achieve the effect of beautifying the legs and shaping the buttocks. They are widely loved by sports enthusiasts, especially young people.

[0003] The simple leg clamping exerciser with publication number CN2737408Y comprises a left swing structure, a right swing structure, a left leg support board and a right leg support board. The left swing structure and the right swing structure are opened by a torsion spring and can be retracted to each other after being squeezed.

[0004] When in use, the legs of the exerciser are clamped between the left and right leg support boards, and the legs need to be opened and closed to overcome the tension of the torsion spring on the left and right swing structures.

[0005] The distance between the sliding shaft and the through hole is shortened by turning the knob, so that the adjustment seat rotates counterclockwise around the support shaft, and the angle between the left and right ends of the torsion spring becomes smaller, thereby increasing the preset torsional resistance of the torsion spring and the force of the clamping leg.

[0006] The torsion resistance regulator configured on the leg clamping exerciser is used to adjust the strength of the torsion spring, which leads to a complex structure and reduced stability of the product. Summary of the invention

[0007] Based on the structural problem caused by the torsion spring of the above-mentioned leg clamping exerciser, the technical problem to be solved by the present invention is to provide a new type of leg exerciser, which provides tension to the leg exerciser by compressing an ordinary spring through a driving rod, and the exerciser's legs are clamped to overcome the tension.

[0008] The technical solution adopted by the present invention to solve the above technical problems is: a leg exerciser comprises a main body and two leg rests; the leg rests comprise a support arm and a leg rest mounted on the support arm;

[0009] The main body includes a driving rod, a spring and a limiting part; the upper end of the driving rod is connected to the support arm through a connecting rod assembly, and the spring is sleeved outside the driving rod;

[0010] The limiting portion is connected to the lower end of the driving rod and supports the lower end of the spring; the upper end of the spring is limited and positioned;

[0011] In the initial state, the two legs are opened and the spring is in an extended state;

[0012] The two leg portions are clamped toward each other, and the rotating support arm pulls the driving rod upward through the connecting rod assembly, so that the lower end of the spring is pressed upward by the limiting portion, so that the spring is in a compressed state.

[0013] A further preferred technical solution of the present invention is: the driving rod is a screw rod, and the limiting part is an adjusting knob screwed on the lower end of the screw rod;

[0014] The position of the adjusting knob on the screw rod is rotated to adjust the tension of the spring in the initial position.

[0015] A further preferred technical solution of the present invention is: a spacer sleeve is provided at the front end of the adjusting knob, the spacer sleeve comprises a cylindrical part and a top ring which are sleeved on the driving rod, and the lower end of the spring is pressed against the top ring.

[0016] A further preferred technical solution of the present invention is: the main body further comprises a circular base, the circular base comprises an upper crossbeam, a lower crossbeam and two side beams, and the two arms are respectively axially connected to the side beams;

[0017] The upper end of the spring is pressed against the lower side of the lower cross beam;

[0018] The lower cross beam is provided with a guide hole;

[0019] The upper end of the driving rod is placed in the circular area of ​​the circular base through the guide hole, and the driving rod moves up and down along the guide hole.

[0020] A further preferred technical solution of the present invention is: the connecting rod assembly includes a cross bar fixed to the upper end of the driving rod and two inclined tie rods, the cross bar includes a middle through hole for the driving rod to pass through and rod heads on both sides; the cross bar is located in the circular area of ​​the circular base,

[0021] The upper end of the inclined tie rod is axially connected to the end of the support arm through a first rotating shaft, and the lower end of the inclined tie rod is axially connected to the rod head of the cross bar through a second rotating shaft.

[0022] A further preferred technical solution of the present invention is: the main body also includes a shell, the circular base is fixed in the shell, the lower end of the driving rod extends downward from the shell, and the limiting portion is located outside the shell.

[0023] A further preferred technical solution of the present invention is: the support arm includes an arm portion for mounting the leg portion and an axially connected arm injection-molded in the arm portion, the axially connected arm is connected to the connecting rod assembly; the leg portion is detachably mounted on the arm portion by a knob.

[0024] Another subject: a leg exerciser, comprising a main body and two leg rests; the leg rests comprising a support arm and a leg rest mounted on the support arm;

[0025] The main body includes a screw rod, a spring and an adjusting knob; the upper end of each screw rod is connected to the support arm through a connecting rod assembly, and the spring is sleeved outside the screw rod;

[0026] The adjusting knob is screwed on the lower end of the screw rod and presses against the lower end of the spring; the upper end of the spring is restricted and positioned;

[0027] In the initial state, the two legs are opened and the spring is in an extended state;

[0028] The two legs are clamped toward each other, and the rotating arm pulls the screw rod upward through the connecting rod assembly, so that the lower end of the spring is squeezed by the knob, so that the spring is in a compressed state;

[0029] The position of the knob on the screw rod can be rotated to adjust the tension of the spring in the initial position.

[0030] A further preferred technical solution of the present invention is: a spacer sleeve is provided at the front end of the knob, the spacer sleeve comprises a cylindrical part and a top ring which are sleeved on the driving rod, and the lower end of the spring is pressed against the top ring.

[0031] A further preferred technical solution of the present invention is: the main body further comprises a shell and a circular base,

[0032] The circular base is fixed in the shell;

[0033] The circular base includes an upper crossbeam, a lower crossbeam and two side beams, and two supporting arms are respectively axially connected to the side beams;

[0034] The upper end of the spring is pressed against the lower side of the lower cross beam;

[0035] The lower cross beam is provided with a guide hole;

[0036] The upper end of the screw rod is placed in the circular region of the circular base through the guide hole, and the screw rod can move up and down along the guide hole;

[0037] The lower end of the screw rod extends downwardly out of the housing, and the knob is located outside the housing.

[0038] A further preferred technical solution of the present invention is: the connecting rod assembly includes a cross bar fixed to the upper end of the screw rod and two inclined tie rods, the cross bar includes a middle through hole for the screw rod to pass through and rod heads on both sides; the cross bar is located in the circular area of ​​the circular base,

[0039] The upper end of the inclined tie rod is axially connected to the end of the support arm through a first rotating shaft, and the lower end of the inclined tie rod is axially connected to the rod head of the cross bar through a second rotating shaft.

[0040] A further preferred technical solution of the present invention is: the housing comprises a front housing and a rear housing, and the front housing and the rear housing are connected by screws.

[0041] Compared with the prior art, the advantage of the present invention is that in the initial state, the two leg parts are open and the spring is in an extended state; the two leg parts are clamped toward each other, and the rotating support arm pulls the driving rod upward through the connecting rod assembly, thereby causing the lower end of the spring to be squeezed by the limiting part, so that the spring is in a compressed state.

[0042] The tension of the leg exerciser is provided by compressing a common spring through a driving rod, and the structure is relatively simple and the stability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0044] Figure 1 This is a schematic diagram of the leg exerciser in an unfolded state;

[0045] Figure 2 It is a schematic diagram of the clamping state of the leg exerciser;

[0046] Figure 3 Disassembly diagram of the structure of the leg exerciser Figure 1 ;

[0047] Figure 4 Disassembly diagram of the structure of the leg exerciser Figure 2 ;

[0048] Figure 5 This is a schematic diagram of the disassembly of the structure of the leg portion in the embodiment;

[0049] Figure 6 Schematic diagram of the structure of the arm drive spring Figure 1 ;

[0050] Figure 7 Schematic diagram of the structure of the arm drive spring Figure 2 ;

[0051] Figure 8 It is a schematic diagram of the structural disassembly of each component of the embodiment;

[0052] Fig. 9 Schematic diagram of the overall structure of the base in this embodiment;

[0053] Fig.10Schematic diagram of the structure of the connecting rod assembly in this embodiment. DETAILED DESCRIPTION

[0054] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0055] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0056] like Figure 1 and Figure 2 As shown, the leg exerciser 100 includes a main body 10 and two leg rests 20 installed on both sides of the main body 10. The leg rest 20 includes a support arm 21 and a leg rest 22 installed on the support arm 21. The outer wall of the leg rest 22 has an arc surface. When in use, the user's legs fit against the arc surface and clamp the two leg rests 20 towards each other to achieve the purpose of leg muscle training. How the leg rest 20 cooperates with the linkage mechanism in the main body 10 to achieve reciprocating clamping and adjust the clamping force will be described in detail below, specifically:

[0057] like Figure 3 and Figure 4 As shown, the main body 10 includes a driving rod 11, a spring 12 and a limiting portion 13. The upper end of the driving rod 11 is connected to the support arm 21 through a connecting rod assembly 30, and the support arm 21 rotates to drive the connecting rod assembly 30 to move; and the spring 12 is sleeved outside the driving rod 11. This spring is different from a traditional torsion spring and is a cylindrical helical spring, that is, a common spring.

[0058] Specifically, the limiting portion 13 is connected to the lower end of the driving rod 11 and supports the lower end of the spring 12; the upper end of the spring 12 is limited and positioned. That is, the upper and lower ends of the spring 12 are limited, and when the driving rod 11 moves up and down, the spring 12 can be compressed or rebounded.

[0059] In actual use, such as Figure 1 , Figure 2 and Figure 6 , Figure 7 As shown, in the initial state, the two leg rests 22 are open and the spring 12 is in an extended state. When the user clamps the two leg rests 22 toward each other, the arm 21 rotates and further pulls the driving rod 11 upward through the connecting rod assembly 30. The driving rod 11 moving upward drives the limiting portion 13 at its lower end to move upward, thereby causing the lower end of the spring 12 to be pressed upward by the limiting portion 13, so that the spring 12 is in a compressed state. When the external force applied by the legs on the leg rest 22 is removed, the leg rest 22 returns to the initial state.

[0060] The advantage of the present invention is that in the initial state, the two leg portions 22 are open and the spring 12 is in an extended state; the two leg portions 22 are clamped toward each other, and the rotating support arm 21 pulls the drive rod upward through the connecting rod assembly 30, thereby causing the lower end of the spring 12 to be squeezed by the limiting portion, so that the spring 12 is in a compressed state.

[0061] The tension of the leg exerciser is provided by driving the rod 11 up and down to further compress the common spring 12 , and the structure is relatively simple and has high stability.

[0062] like Figure 8 As shown, the driving rod 11 is a screw rod f, and the limiting part 13 is an adjusting knob b screwed on the lower end of the screw rod f; when in use, the adjusting knob b is rotated on the screw rod f to adjust the tension of the spring 12 in the initial position, thereby matching the clamping force required by the user to meet the training intensity the user wants to achieve. The outer surface of the adjusting knob b is arranged with a threaded structure to further increase the friction between the user's hand and the adjusting knob b for easier rotation.

[0063] It should be further mentioned that a spacer sleeve c is provided at the front end of the adjusting knob b in this embodiment, and the spacer sleeve c includes a cylindrical part c1 and a top ring c2 which are sleeved on the driving rod 11, and the lower end of the spring 12 is pressed against the upper wall surface of the top ring c2. That is, the upper wall surface of the top ring c2 provides a limiting surface for the compression of the spring 12. The manufacturer can also provide the limiting surface required for the compression of the spring 12 through other shapes or other structures.

[0064] It should be further explained that the spacer c and the adjusting knob b are integrally injection molded, or can be a separate structure.

[0065] The main body 10 of the leg exerciser 100 further includes a circular base 50, which includes an upper crossbeam 51, a lower crossbeam 52 and two side beams 53. The two support arms 21 are respectively axially connected to the side beams 53. The axially connected ends of the support arms 21 and the side beams 53 can rotate relative to each other.

[0066] The upper end of the spring 12 is pressed against the lower side of the lower cross beam 52, that is, the lower side of the lower cross beam 52 provides a limiting surface for the upper end position of the spring 12. The lower cross beam 52 is provided with a guide hole 54, and the upper end of the driving rod 11 is placed in the circular region h of the circular base 50 through the guide hole 54, and the driving rod 11 can move up and down along the guide hole 54.

[0067] Furthermore, the upper end of the driving rod 11 has a resting portion. After the driving rod 11 and the circular base 50 are installed, the resting portion is limited on the upper side of the lower cross beam 52 to prevent the driving rod 11 from escaping from the guide hole 54 when moving downward.

[0068] In addition, it should be explained that the connecting rod assembly 30 includes a cross rod 32 fixed to the upper end of the driving rod 11 and two inclined rods 31 .

[0069] The crossbar 32 includes a through hole 01 in the middle for the driving rod 11 to pass through and rod heads 02 on both sides; the crossbar 32 is located in the circular region h of the circular base 50, that is, the crossbar 32 is located above the lower crossbeam 52 after installation. During installation, the driving rod 11 in this embodiment passes through the crossbar 32 and the guide hole 54 in sequence, and after installation, the resting portion of the upper end of the driving rod 11 is limited above the crossbar 32.

[0070] Furthermore, the upper end of the inclined rod 31 is axially connected to the end of the support arm 21 through the first rotation axis v1, and the lower end of the inclined rod 31 is axially connected to the rod head 02 of the cross bar 32 through the second rotation axis v2.

[0071] During actual use, the user places the leg trainer 100 between the two legs, so that the two sides of the thigh fit the arc surface of the front side of the leg support 22, and the two legs clamp the leg support 22 towards each other. The rotating support arm 21 drives the inclined rod 31 of the connecting assembly 30 to rotate, and further pulls up the driving rod 11 through the cross bar 32. The upward moving driving rod 11 drives the spacer c at its lower end to compress the spring 12 upward, and the user achieves the effect of training leg muscles by overcoming the elastic force of the spring 12 itself. When the user relaxes his muscles and spreads his legs, the rebound force of the compressed spring 12 further drives the connecting rod assembly 30, and then drives the leg support 22 to spread.

[0072] like Figure 2 As shown, the main body 10 of the leg exerciser 100 further includes a housing 101, and the circular base 50 is fixed in the housing 101, which not only protects the components, but also makes the overall appearance of the leg exerciser 100 more beautiful and neat. The lower end of the driving rod 11 extends downward from the housing 101, and the limiting part 13 is located outside the housing 101, so that the user can rotate the limiting part 13.

[0073] Preferably, the support arm 21 includes an arm portion 23 on which the leg portion 22 is mounted and a shaft connecting arm 24 which is injection molded in the arm portion 23 , and the shaft connecting arm 24 is connected to the connecting rod assembly 30 ; the leg portion 22 is detachably mounted on the arm portion 23 via a knob p.

[0074] In this embodiment, the rotating support arm 21 drives the driving rod 11 to move up and down through the connecting rod assembly 30, and further compresses the spring 12 to provide the tension required for leg training. On the one hand, the structure of the above technical solution is relatively simple. On the other hand, only a spring 12 of ordinary structure is needed, and the compression direction and the rebound force direction are consistent with the running direction of the driving rod 11, so that the overall stability of the leg exerciser 100 is higher.

[0075] The above is an introduction to the leg exerciser provided by the present invention. The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. Leg exerciser, characterized by It comprises a main body and two leg rests; the leg rests comprise a support arm and a first leg rest mounted on the support arm; The main body includes a driving rod, a spring and a limiting portion; the upper end of the driving rod is connected to the support arm through a connecting rod assembly, and the spring is sleeved outside the driving rod; The limiting portion is connected to the lower end of the driving rod and supports the lower end of the spring; the upper end of the spring is restricted and positioned; In the initial state, the two legs are opened and the spring is in an extended state; The two supporting legs are clamped toward each other, and the rotating support arm pulls the driving rod upward through the connecting rod assembly, thereby causing the lower end of the spring to be pressed upward by the limiting portion, so that the spring is in a compressed state; The main body further comprises a circular base, the circular base comprising an upper crossbeam, a lower crossbeam and two side beams, and the two supporting arms are respectively axially connected to the side beams; The upper end of the spring presses against the lower side of the lower crossbeam; The lower cross beam is provided with a guide hole; The upper end of the driving rod is placed into the circular area of ​​the circular base through the guide hole, and the driving rod moves up and down along the guide hole; The main body further includes a shell, the circular base is fixed in the shell, the lower end of the driving rod extends downwardly out of the shell, and the limiting portion is located outside the shell; The connecting rod assembly includes a cross bar fixed to the upper end of the driving rod and two inclined rods. The cross bar includes a middle through hole for the driving rod to pass through and rod heads on both sides. The cross bar is located in the circular area of ​​the circular base. The upper end of the driving rod has a resting portion. After the driving rod and the circular base are installed, the resting portion is defined on the upper side of the lower crossbeam and is defined above the crossbeam. The upper end of the inclined tie rod is axially connected to the end of the support arm through a first rotating shaft, and the lower end of the inclined tie rod is axially connected to the rod head of the cross bar through a second rotating shaft; The support arm includes an arm portion for mounting the first leg portion and a shaft connecting arm injection-molded in the arm portion, wherein the shaft connecting arm is connected to the connecting rod assembly; the first leg portion is detachably mounted on the arm portion via a knob.

2. The leg exerciser according to claim 1, characterized in that The driving rod is a screw rod, and the limiting part is an adjusting knob screwed on the lower end of the screw rod; The position of the adjusting knob on the screw is rotated to adjust the tension of the spring in the initial position.

3. The leg exerciser according to claim 2, characterized in that A spacer is provided at the front end of the adjusting knob. The spacer comprises a cylindrical part and a top ring which are sleeved on the driving rod. The lower end of the spring is pressed against the top ring.

4. Leg exerciser, characterized by It comprises a main body and two leg rests; the leg rests comprise a support arm and a first leg rest mounted on the support arm; The main body includes a screw, a spring and an adjusting knob; the upper end of each screw is connected to the support arm through a connecting rod assembly, and the spring is sleeved outside the screw; The adjusting knob is screwed onto the lower end of the screw rod and presses against the lower end of the spring; the upper end of the spring is restricted and positioned by the return base; In the initial state, the two legs are opened and the spring is in an extended state; The two supporting legs are clamped toward each other, and the rotating support arm pulls the screw rod upward through the connecting rod assembly, thereby causing the lower end of the spring to be squeezed by the knob, so that the spring is in a compressed state; The position of the knob on the screw rod can be rotated to adjust the tension of the spring in the initial position; The main body further includes a shell, and the circular base is fixed in the shell; The circular base includes an upper crossbeam, a lower crossbeam and two side beams, and the two supporting arms are respectively axially connected to the side beams; The upper end of the spring presses against the lower side of the lower crossbeam; The lower cross beam is provided with a guide hole; The upper end of the screw is placed in the circular area of ​​the circular base through the guide hole, and the screw can move up and down along the guide hole; The lower end of the screw rod extends downwardly out of the housing, and the knob is located outside the housing; The housing comprises a front housing and a rear housing, wherein the front housing and the rear housing are connected by screws; The outer wall of the first leg support portion is an arcuate surface, so that the user's legs fit into the arcuate surface and the two leg support portions are clamped toward each other; The connecting rod assembly includes a cross bar fixed to the upper end of the screw rod and two inclined rods. The cross bar includes a through hole in the middle for the screw rod to pass through and rod heads on both sides. The cross bar is located in the circular area of ​​the circular base. The upper end of the screw rod has a resting portion. After the screw rod and the circular base are installed, the resting portion is defined on the upper side of the lower crossbeam and is defined above the crossbeam. The upper end of the oblique tie rod is axially connected to the end of the support arm through a first rotating shaft, and the lower end of the oblique tie rod is axially connected to the rod head of the cross bar through a second rotating shaft.

5. The leg exerciser according to claim 4, characterized in that A spacer is provided at the front end of the knob. The spacer comprises a cylindrical part and a top ring which are sleeved on the driving rod. The lower end of the spring is pressed against the top ring.

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