CN212262334U - Portable multifunctional fitness equipment - Google Patents

Abstract

The utility model discloses a portable multifunctional fitness device, which comprises a containing box, a connecting rod, a pair of torsion frames, a pair of crank arms, a wheel body and a plurality of elastic ropes, wherein the connecting rod, the pair of torsion frames, the pair of crank arms, the wheel body and the plurality of elastic ropes are contained in the containing box; during the use, through the connecting rod, the torque frame, the crank arm, the different combinations of wheel body and a plurality of stretch cord, can realize the dumbbell, the barbell, the spring-grip, the arm strength ware, the motion function of multiple apparatus such as exercise wheel, realize the regulation of strength through the stretch cord simultaneously, can be applicable to the exercise demand of anyone, also alleviateed simultaneously and carried gravity greatly, when idle state, accomodate each part in the containing box, area has been reduced greatly, this multi-functional body-building apparatus of combination formula can be tempered each position of health through the combination, greatly reduced body-building cost.

Description

Portable multifunctional fitness equipment

Technical Field

The utility model relates to the technical field of fitness equipment, in particular to a portable multifunctional fitness device.

Background

Body-building apparatus on the existing market has the dumbbell, the barbell, the abdomen building wheel, the chest expander, arm strength ware, rowing machine etc. although use above-mentioned apparatus to take exercise can effectively increase user's strength, but the equal function singleness of above-mentioned apparatus, and volume and quality are heavier, especially strength type body-building apparatus, the mode through increasing the counter weight is mostly, reach the purpose of taking exercise the health, dumbbell and barbell is in the in-process of lifting must have the coach to assist moreover, in order to avoid user's strength to lack and lead to the fact the injury to self.

In order to exercise multiple parts of the body, a body builder must purchase multiple fitness devices, which occupies a large amount of space and increases the exercise cost greatly; meanwhile, the existing fitness equipment is not convenient to carry due to large volume and is not beneficial to outdoor use.

Aiming at the problems of the existing fitness equipment, a portable multifunctional fitness equipment is needed to be designed.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model provides a portable multi-functional body-building apparatus through the different combinations of part, realizes multiple body-building function, and convenient to accomodate simultaneously carries.

The utility model discloses a realize through following technical scheme:

a portable multifunctional fitness apparatus comprises a storage box, a connecting rod, a pair of torsion frames, a pair of crank arms, a wheel body and a plurality of elastic ropes, wherein the connecting rod, the pair of torsion frames, the pair of crank arms, the wheel body and the plurality of elastic ropes are stored in the storage box;

the torsion frame comprises two support frames, each support frame comprises a bottom plate and support arms which are symmetrically arranged on two sides of the bottom plate and extend upwards in an inclined mode, the upper ends of the support arms of the two support frames are hinged with each other through a hinge shaft, a spring is arranged between the support arms of the two support frames, and one side of the bottom plate of at least one support frame is provided with a connecting hole for connecting an elastic rope;

a plurality of pull rings for connecting the elastic ropes are arranged on the surface of the crank arm at intervals along the axial direction of the crank arm;

when two ends of the elastic rope are respectively connected with the connecting holes of the two torsion frames, the two torsion frames are combined to form the chest expander;

the center of the wheel body is provided with a mounting hole, when the two crank arms are respectively positioned at two sides of the wheel body, and one ends of the two crank arms are respectively connected with the mounting hole of the wheel body to form the abdomen building wheel in a combined mode;

when two ends of the elastic rope are respectively connected with the connecting hole of the torsion frame and the pull ring of the crank arm, the dumbbell is formed by combination;

when the two crank arms are connected through the connecting rod and each crank arm is connected with a torsion frame through the elastic rope, the barbell is formed in a combined mode.

Preferably, the two support frames of the torsion frame are respectively a first support frame and a second support frame, a hollow shaft is arranged between the upper ends of the two support arms of the first support frame, hinge holes are formed in the upper ends of the two support arms of the second support frame, the hinge shaft penetrates through the hinge holes and the hollow shaft to hinge the first support frame and the second support frame, and a limiting mechanism is arranged at the hinge position and used for limiting the preset angle of the first support frame and the second support frame.

Preferably, stop gear includes stopper and dog, and the stopper is located the tip of hollow shaft to along its axial extension to the support arm upper end of second support frame, the dog setting is in the support arm upper end of second support frame, and when stopper and dog contact, it is spacing to carry out circumference to first support frame and second support frame.

Preferably, the two bottom plates of one of the torsion frames are provided with hand-holding holes.

Preferably, the two base plates of the other torsion frame are symmetrically provided with crank arm holes for fitting the crank arms, and when the ends of the two crank arms are respectively installed in the two crank arm holes, the crank arms and the torsion frame are combined to form the arm strength device.

Preferably, the curved arm hole is an inclined hole.

Preferably, one end of the crank arm is provided with an external thread, and the other end of the crank arm is provided with an external thread matched with the internal thread.

Preferably, a plurality of massage contacts are uniformly distributed on the surface of the connecting rod, and a plurality of pull rings for connecting the elastic ropes are axially arranged on the surface of the connecting rod at intervals.

Preferably, the wheel body includes the wheel rim, and one side of wheel rim is provided with the chamber that holds that is used for installing the torsional spring, and the center that holds the chamber is provided with hollow pivot, and the center end and the pivot of torsional spring are connected, the outer lane tip of torsional spring and the lateral wall rigid coupling that holds the chamber, the both ends of the hole of pivot be provided with crank arm external screw thread complex internal thread.

Preferably, the storage box comprises a box body, a box cover, an adjusting mechanism and a positioning mechanism;

the box body is hinged with the box cover through the adjusting mechanisms, two groups of adjusting mechanisms are arranged at two sides of the containing box and are positioned in the containing box, each group of adjusting mechanisms comprises two telescopic rods which are arranged in a crossed way,

the both ends of telescopic link are articulated with the one end of box and case lid respectively, are provided with the locating pin on the telescopic link for lock the length of telescopic link, positioning mechanism is used for fixing a position the opening angle of box body.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model provides a portable multifunctional fitness device, which comprises a containing box, a connecting rod, a pair of torsion frames, a pair of crank arms, a wheel body and a plurality of elastic ropes, wherein the connecting rod, the pair of torsion frames, the pair of crank arms, the wheel body and the plurality of elastic ropes are contained in the containing box; during the use, through the connecting rod, the torque frame, the crank arm, the different combinations of wheel body and a plurality of stretch cord, can realize the dumbbell, the barbell, the spring-grip, the arm strength ware, the motion function of multiple apparatus such as exercise wheel, realize the regulation of strength through the stretch cord simultaneously, can be applicable to the exercise demand of anyone, also alleviateed simultaneously and carried gravity greatly, when idle state, accomodate each part in the containing box, area has been reduced greatly, this multi-functional body-building apparatus of combination formula can be tempered each position of health through the combination, greatly reduced body-building cost.

Drawings

Fig. 1 is a schematic view of the storage state of the body-building apparatus of the present invention;

fig. 2 is a schematic structural view of a first torque frame of the present invention;

fig. 3 is a schematic structural diagram of a second torsion frame according to the present invention;

FIG. 4 is an exploded view of the torsion frame of the present invention;

fig. 5 is a schematic structural view of the crank arm of the present invention;

fig. 6 is a schematic structural view of the connecting rod of the present invention;

FIG. 7 is a schematic view of the wheel body according to the present invention;

FIG. 8 is an exploded view of the wheel body of the present invention;

FIG. 9 is a schematic view of the chest developer composed of the body-building apparatus of the present invention;

FIG. 10 is a schematic view of the abdomen building wheel formed by the body-building apparatus of the present invention;

FIG. 11 is a schematic view of barbells formed by the fitness equipment of the present invention;

FIG. 12 is a schematic view of the rowing machine composed of the body-building apparatus of the present invention;

FIG. 13 is a schematic view of the arm exerciser made of the body-building apparatus of the present invention;

fig. 14 is a state diagram of the storage box of the utility model adjusted to a stool;

fig. 15 shows the state degree of the box cover of the storage box of the present invention adjusted to 60 °;

fig. 16 is a side view of the storage box according to the present invention with the box cover adjusted to 60 °.

In the figure: 1. a storage box; 2. a first torsion frame; 3. a second torsion frame; 4. a connecting rod; 5. a crank arm; 6. a wheel body; 7. a soft belt; 8. an elastic cord; 11. a box body; 12. a box cover; 13. a telescopic rod; 14. A limiting rod; 15. positioning a rod; 21. a first support frame; 22. a second support frame; 23. hinging a shaft; 24. A spring; 25. holding the hole by hand; 26. a support arm; 27. a limiting block; 28. a stopper; 29. a belt ring; 30. Connecting holes; 31. a crank arm hole; 41. a pull ring; 42. a massage contact; 43. a groove; 61. a rim; 62. a torsion spring; 63. a rotating shaft; 64. and (7) a cover plate.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings, which are provided for purposes of illustration and not limitation.

Referring to fig. 1 to 6, a portable multifunctional fitness apparatus comprises a storage box 1, and a connecting rod 4, two torsion frames, two crank arms 5, a wheel body 6 and a plurality of elastic ropes 8 accommodated in the storage box.

The torsion frame comprises two support frames, each support frame comprises a bottom plate and support arms 26 which are symmetrically arranged at two ends of the bottom plate and extend upwards, the upper ends of the support arms of the two support frames are hinged with each other through a hinge shaft 23, a spring 24 is arranged between the support arms of the two support frames, and one side of the bottom plate of at least one support frame is provided with a connecting hole 30 for connecting an elastic rope;

a plurality of pull rings for connecting the elastic ropes 8 are arranged on the surface of the crank arm at intervals along the axial direction of the crank arm, and connecting structures are arranged at two ends of the crank arm and used for connecting the two crank arms end to end;

when two ends of the elastic rope 8 are respectively connected with the connecting holes of the two torsion frames, a chest expander is formed;

the center of the wheel body is provided with a mounting hole, when the two crank arms are respectively positioned at two sides of the wheel body, and one ends of the two crank arms are respectively connected with the mounting hole of the wheel body 6 to form the abdomen building wheel;

when the two ends of the elastic rope 8 are respectively connected with the connecting hole 30 of the torsion frame and the pull ring 41 of the crank arm, a dumbbell is formed;

when the two crank arms are connected by the railing 4 and each crank arm is connected with a torsion frame by the elastic rope 8, the barbell is formed.

Referring to fig. 2-4, specifically, the two support frames of the torsion frame are a first support frame 21 and a second support frame 22, the first support frame 21 and the second support frame 22 are symmetrically arranged, the support arms 26 of the two support frames are obliquely arranged on the top of the bottom plate, a hollow shaft is arranged between the upper ends of the two support arms of the first support frame 21, hinge holes are arranged at the upper ends of the two support arms of the second support frame 22, the hinge shafts penetrate through the hinge holes and the hollow shaft to hinge the first support frame 21 and the second support frame 22, and a limiting mechanism is arranged at the hinge position to limit the preset angle of the support arms of the first support frame 21 and the second support frame 22, so that the bottom plates of the first support frame 21 and the second support frame 22 are located on the same.

The spring fixing sleeves are arranged on the opposite side walls of the supporting arms of the first supporting frame 21 and the second supporting frame 22, and two ends of the spring are respectively arranged in the fixing sleeves of the first supporting frame 21 and the second supporting frame 22 and are in a prepressing state.

Stop gear includes stopper 27 and dog 28, stopper 27 is located the tip of hollow shaft to along its axial extension to the support arm upper end of second support frame, dog 28 sets up on the lateral wall of the support arm hinge hole of second support frame, and when stopper 27 and dog 28 contact, then carry out circumference spacing to first support frame 21 and second support frame 22, the bottom plate of two support frames is located the coplanar simultaneously. When the spring is stressed, the first support frame 21 and the second support frame 22 rotate towards each other, and the limit block 27 is separated from the stop block 28.

The number of the torsion frames is two, namely a first torsion frame 2 and a second torsion frame 3.

The bottom plates of the first support frame 21 and the second support frame 22 of the first torsion frame 2 are respectively provided with a hand holding hole 25, when one hand holds the two hand holding holes 25, fingers bend towards the palm center, so that the torsion frame forms a spring-grip exerciser, and the exercise of arm muscles is realized.

And crank arm holes 31 for assembling crank arms 5 are arranged on the bottom plates of the first support frame and the second support frame of the second torsion frame 3, the crank arm holes are inclined holes, the inclination of the crank arm holes is the same as that of the support arms, and when the end parts of the two crank arms are respectively arranged in the two crank arm holes 31, an arm force device is formed.

Preferably, the hollow shaft is provided with a flexible anti-skid sleeve, the bottom plates of the two torsion frames are placed on the ground, and when the hollow shaft is held by hands to perform push-up, the palm is protected.

The support frame is provided with a plurality of connecting holes 30 for being assembled with a plurality of elastic ropes 8, so that the tension can be adjusted, and the support frame is more applicable.

Referring to fig. 5, the crank arm 5 is a bending structure, and includes a hand-holding section and connecting sections disposed at two ends thereof, the two connecting sections are coaxial and are not coaxial with the hand-holding section, so as to guide the force application direction of the hand and limit the position of the hand during exercise.

The connecting structure of the crank arms comprises internal threads arranged at two ends of the connecting structure and external threads matched with the internal threads, the two crank arms are connected through the threads to form a small dumbbell rod, and the pull rod of each crank arm is arranged on the surface of the connecting section.

Referring to fig. 6, the two ends of the connecting rod 4 are provided with internal threaded holes matched with the external threads of the crank arms, the two crank arms are connected with the two ends of the connecting rod through threads, a long dumbbell rod can be formed, the barbell rod can be used in a matching way through the connection of the two crank arms or the combined connection of the crank arms and the connecting rod, and can be suitable for different people to use barbells,

referring to fig. 6, a plurality of massage contacts are uniformly distributed on the surface of the connecting rod 4, a plurality of pull rings 41 are arranged on the surface of the connecting rod 4 at intervals, an axial groove is formed in the surface of the connecting rod 4, the pull rings are arranged in the groove, the top of each pull ring is lower than the surface of the connecting rod, when the connecting rod is used as a massage rod, the pull rings are prevented from touching a human body, and meanwhile, rolling massage of the connecting rod is guaranteed. The center of the connecting rod 4 is provided with an annular groove 43 for connecting the winding rope, and when heavy object winding rope practice is carried out, the groove elastic rope is properly guided.

Referring to fig. 7 and 8, the wheel body 6 includes a rim 61, one side of the rim 61 is provided with a containing cavity for installing a torsion spring, a hollow rotating shaft 63 is arranged at the center of the containing cavity, the center end of the torsion spring is connected with the rotating shaft 63, the end part of the outer ring of the torsion spring is fixedly connected with the side wall of the containing cavity, and the two ends of the inner hole of the rotating shaft 63 are provided with inner threads matched with the outer threads of the crank arm.

Referring to fig. 14 to 16, the storage box 1 includes a box body 11, a box cover 12, and an adjusting mechanism and a positioning mechanism.

The box 11 is articulated through adjustment mechanism case lid 12, and two sets of adjustment mechanism settings are in the both sides of containing box to be located the inside of containing box, every adjustment mechanism of group includes two alternately arranged telescopic links 13, and positioning mechanism is used for fixing a position the open mode of box body.

Specifically, the telescopic link has a plurality of cover chi to overlap layer upon layer and establishes and form for the height that opens and shuts of control case lid, the both ends of telescopic link are articulated with the one end of box 11 and case lid 12 respectively, are provided with the locating pin on the telescopic link, are used for locking the length of telescopic link.

The positioning mechanism comprises a limiting rod 14 and a positioning rod 15, the positioning rod is arranged on the inner fixed surface of the box cover and is positioned on one side of two telescopic rods which are arranged in a crossed mode, and a plurality of clamping grooves for positioning are formed in the positioning rod 15; one end of the limiting rod 14 is hinged to the middle of the telescopic rod, and the other end of the limiting rod is used for being clamped in the clamping groove to position the opening angle of the box cover 12.

When the box body needs to be converted into a stool, the telescopic rod is adjusted to the maximum length and is positioned through the pin, and meanwhile, one end of the limiting rod 14 is clamped into the clamping groove of the positioning rod 15, so that the angle positioning of the box cover can be realized; when the storage box is stored, the end part of the positioning rod is separated from the clamping groove, then the box cover is pressed downwards, the telescopic rod is retracted, and the storage box can be folded.

The box cover is provided with a plurality of clamping grooves for fixing the connecting rod 4, the crank arm 5 and the torsion frame in the clamping grooves, and the situation that the box cover shakes during carrying is avoided.

The following explains the combination mode of the portable multifunctional fitness equipment provided by the utility model in detail.

Push-up support

When the push-up exercise is carried out, the bottom plates of the two torsion frames are placed on the ground, the hollow shafts of the torsion frames are respectively tightly held by both hands, so that the push-up exercise can be carried out, and the core of the abdomen, the triceps brachii and the pectoralis major are strengthened; because both hands are supported on the hollow shaft, the palm is prevented from contacting the ground, and the palm is effectively protected.

Chest-developer

Referring to fig. 9, the two torque frames are connected by a plurality of elastic ropes, and the hollow shaft of the torque frame is held by hand, and the pull training can be performed by the chest expanding action.

Dumbbell bend

The two torsion frames are connected through a plurality of elastic ropes, one torsion frame is placed on the ground, feet penetrate through the space between the bottom plate and the hollow shaft, the other torsion frame is tightly held by hands, and arms are bent upwards, so that the dumbbell can be bent and lifted, and biceps brachii can be exercised; adopt the stretch cord to replace the counter weight, make it also just accomodate, also just conveniently carry simultaneously, further set up two belt loops 29 on the bottom plate, two belt loops are located the both sides of bottom plate, are located the both sides of sole or arm promptly, wear to adorn soft area on the belt loop, bind hand or sole and bottom plate through soft area, play the guard action to foot and arm.

Spring-grip dumb-bell

The two hand holding holes of the first torsion frame are held by a single hand, fingers bend towards the palm center, and the springs compress to exercise arm muscles.

Arm strength exerciser

Referring to fig. 13, the two crank arm holes of the second torsion frame are threaded holes, the two crank arms are connected with the torsion frame through threads, the lower ends of the crank arms are held by hands, the two arms move in opposite directions, and the springs are compressed, so that the training of arm strength muscles can be realized.

Barbell

Referring to fig. 11, two crank arms are connected to two ends of a connecting rod, and the two crank arms are respectively connected to a torsion frame through elastic ropes;

the two arms are bent upwards by tightly holding the bent arms with hands, so as to exercise biceps brachii, brachioradialis and circumflex.

Meanwhile, a combined rod formed by the crank arm and the connecting rod can be carried on the shoulder, the legs squat deeply, and the waist twisting exercise can be realized by adjusting the length of the elastic rope.

Barbell lifting device

The soft belt is arranged at the back and lies on the ground, and the elastic rope is connected with the two ends of the soft belt.

The barbell is pushed and lifted by tightly holding the crank arms with both hands and pushing the combined rod upwards.

Abdomen building roller

Referring to fig. 10, the external thread ends of the two crank arms are respectively connected with the internal thread of the rotating shaft on the wheel body, so that the crank arms and the wheel body can be combined to form the abdomen exercise wheel to strengthen the abdominal and back muscles.

Crunch movement

Firstly, the end part of the articulated shaft of the torsion frame extends out of the supporting arm and is provided with an external thread which is matched with the threaded hole of the crank arm, and the two torsion frames are connected with the two ends of the central mounting hole of the wheel body through threads.

Then, the containing box is opened, the box cover is adjusted to an included angle of 60 degrees through the positioning mechanism, the containing box is placed on the ground, and the containing box is seated on the ground by leaning against the box cover;

finally, the sole is inserted into the torsion frame and fixed by the soft belt 7, the leg is bent, the leg curling motion is carried out, and the abdomen and the leg are exercised.

Rowing machine

Referring to fig. 12, two torsion frames are connected to two ends of a connecting rod, two crank arms are connected end to end, and the connecting rod is connected with the two crank arms through elastic ropes;

the box cover of the containing box is adjusted to 60 degrees, two feet of the containing box lean against the box cover and extend into the torsion frame and are fixed, two crank arms are tightly held by two hands, leg stretching action is continuously carried out, the elastic rope is stretched, and rowing action is realized.

Dumbbell side flat lifting

The containing box is adjusted to the position that the two torsion frames of the stool are respectively connected with a group of elastic ropes, the other ends of the two groups of elastic ropes are connected through a soft belt, and the soft belt penetrates through the bottom of the box cover.

Two hands respectively tightly hold a torsion frame, and two arms stretch flat to realize the side flat lifting of the dumbbell.

Leg lifting exercise

Adjust the containing box to the stool form, both feet are connected with two torque frames, and the torque frame passes through the stretch cord to be connected with the box, realizes lifting the leg motion.

The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.

Claims (10)

1. A portable multifunctional fitness apparatus is characterized by comprising a storage box (1), a connecting rod (4), a pair of torsion frames, a pair of crank arms (5), a wheel body (6) and a plurality of elastic ropes (8), wherein the connecting rod, the pair of torsion frames, the pair of crank arms, the wheel body (6) and the plurality of elastic ropes are stored in the storage box;

the torsion frame comprises two support frames, each support frame comprises a bottom plate and support arms (26) which are symmetrically arranged on two sides of the bottom plate and extend upwards in an inclined mode, the upper ends of the support arms of the two support frames are hinged to each other through a hinge shaft (23), a spring (24) is arranged between the support arms of the two support frames, and one side of the bottom plate of at least one support frame is provided with a connecting hole (30) used for connecting an elastic rope;

the surface of the crank arm is provided with a plurality of pull rings for connecting elastic ropes (8) at intervals along the axial direction;

when two ends of the elastic rope (8) are respectively connected with the connecting holes of the two torsion frames, the two torsion frames are combined to form the chest expander;

the center of the wheel body is provided with a mounting hole, when the two crank arms are respectively positioned at two sides of the wheel body, and one ends of the two crank arms are respectively connected with the mounting hole of the wheel body (6) to form the abdomen building wheel in a combined mode;

when two ends of the elastic rope (8) are respectively connected with the connecting hole (30) of the torsion frame and the pull ring (41) of the crank arm, a dumbbell is formed by combination;

when the two crank arms are connected through the connecting rod (4) and each crank arm is connected with a torsion frame through the elastic rope (8), the barbell is formed in a combined mode.

2. The portable multifunctional fitness apparatus according to claim 1, wherein the two support arms of the torsion frame are a first support arm (21) and a second support arm (22), a hollow shaft is disposed between the upper ends of the two support arms of the first support arm (21), a hinge hole is disposed at the upper end of the two support arms of the second support arm (22), a hinge shaft passes through the hinge hole and the hollow shaft to hinge the first support arm (21) and the second support arm (22), and a limiting mechanism is disposed at the hinge joint to limit a preset angle of the first support arm (21) and the second support arm (22).

3. A portable multi-purpose fitness apparatus according to claim 2, wherein the limiting mechanism comprises a limiting block (27) and a stop (28), the limiting block (27) is located at the end of the hollow shaft and extends axially to the upper end of the support arm of the second support frame, the stop (28) is located at the upper end of the support arm of the second support frame, and when the limiting block (27) and the stop (28) are in contact, the first support frame (21) and the second support frame (22) are circumferentially limited.

4. A portable multi-purpose fitness apparatus according to claim 2, wherein the two bottom plates of one of the torsion frames are provided with hand-held holes (25).

5. A portable multi-purpose fitness apparatus according to claim 4, wherein the two bottom plates of the other torsion frame are symmetrically provided with crank arm holes (31) for fitting the crank arms (5), and when the ends of the two crank arms are respectively fitted in the two crank arm holes (31), the crank arms and the torsion frame are combined to form the arm exerciser.

6. A portable multi-purpose fitness apparatus according to claim 5, wherein the curved arm holes (31) are angled holes.

7. The portable multi-purpose fitness apparatus of claim 1, wherein the crank arm is provided with an external thread at one end and an external thread at the other end for engaging with the internal thread.

8. The portable multifunctional fitness apparatus according to claim 1, wherein a plurality of massage contacts are uniformly distributed on the surface of the connecting rod (4), and a plurality of pull rings (41) for connecting the elastic rope are axially arranged on the surface of the connecting rod (4) at intervals.

9. The portable multifunctional fitness apparatus according to claim 1, wherein the wheel body (6) comprises a wheel rim (61), one side of the wheel rim (61) is provided with a containing cavity for installing a torsion spring, a hollow rotating shaft (63) is arranged in the center of the containing cavity, the center end of the torsion spring is connected with the rotating shaft (63), the end part of the outer ring of the torsion spring is fixedly connected with the side wall of the containing cavity, and two ends of the inner hole of the rotating shaft (63) are provided with inner threads matched with the outer threads of the crank arm.

10. A portable multi-purpose fitness apparatus according to claim 1, wherein the storage case (1) comprises a case body (11), a case cover (12), an adjustment mechanism and a positioning mechanism;

the box body (11) is hinged through a box cover (12) of an adjusting mechanism, two groups of adjusting mechanisms are arranged at two sides of the containing box and are positioned in the containing box, each group of adjusting mechanisms comprises two telescopic rods (13) which are arranged in a crossed manner,

the both ends of telescopic link are articulated with the one end of box (11) and case lid (12) respectively, are provided with the locating pin on the telescopic link for lock the length of telescopic link, positioning mechanism is used for fixing a position the opening angle of box body.

Images