Multifunctional trainer

Abstract

A multifunctional trainer is characterized by comprising a front supporting part, a rear supporting part and an elastic rope, the front supporting part is provided with a walking mechanism capable of sliding front and back, one end of the elastic rope is connected with the front supporting part, the other end of the elastic rope is connected with the rear supporting part, and the front supporting part comprises a left supporting part and a right supporting part; the left supporting part and the right supporting part are connected with each other through a detachable connecting mechanism, the left supporting part and the right supporting part can be connected into a whole after being connected and can slide front and back at the same time, a user can put the two elbows on the left supporting part and the right supporting part to do abdominal exercise of bending front and back sliding, and the left supporting part and the right supporting part can be divided into two parts after being detached. The left supporting part and the right supporting part can alternately slide front and back, sliding of the left supporting part and sliding of the right supporting part do not affect each other, the moving tracks of the left supporting part and the right supporting part can be different, therefore, the two elbows of a user can do abdomen building movement of alternate front-back movement or multidirectional movement, the degree of freedom is higher, practicability is higher, and functionality is higher.

Description

Technical Field

[0001] The utility model relates to a multifunctional training device. Background Art

[0002] The Chinese patent document with the announcement number CN218980363U discloses a double-wheel elbow-supported abdominal wheel, including a connecting frame, wheels and a support rod, and there are two wheels arranged on the front and rear sides of the connecting frame, and the bottoms of the two wheels are located in the same plane, the support rod is U-shaped, and the two sides of the inner wall of the support rod opening are connected to the left and right sides of the connecting frame; elbow support pieces are arranged on both sides of the outer wall of the support rod opening, and the abdominal exercise can be started by placing the elbow on the elbow support piece and holding the support rod with the hand. Therefore, the utility model makes the overall operation more stable through the arrangement of two wheels, and secondly, the arrangement of the elbow support piece increases a fulcrum, so that when exercising, the strength of the arm can be reduced and the strength can be converted to the elbow, thereby reducing the difficulty of exercise, and making it easier for beginners to do it. The scheme also specifically discloses: the wheel is provided with a mounting rod, and both ends of the mounting rod are connected to the connecting frame, an elastic member for increasing resistance is sleeved on the outer side of the mounting rod, and one end of the elastic member is connected to the inner wall of the wheel, and the other end of the elastic member is connected to the mounting rod, and both ends of the elastic member are expanded as the wheel rotates counterclockwise, and are compressed as the wheel rotates clockwise, and the elastic force is changed by setting the elastic member and cooperating with the rotation of the wheel to balance the force on the wheel.

[0003] However, the exercise effects that can be achieved by the above schemes are relatively simple and have poor functionality. Utility Model Content

[0004] The utility model aims to provide a multifunctional training device which can achieve different training effects.

[0005] The purpose of the utility model is achieved through the following technologies:

[0006] A multifunctional training device, characterized in that it includes a front support component, a rear support component, and an elastic rope, the front support component is provided with a walking mechanism that can slide back and forth, one end of the elastic rope is connected to the front support component, and the other end is connected to the rear support component, the front support component includes a left support part and a right support part, the left support part and the right support part are connected to each other by a detachable connecting mechanism, the left support part and the right support part can be connected as a whole after being connected, and can slide back and forth at the same time, a user can place both elbows on the left support part and the right support part to do abdominal exercises such as leaning over and sliding back and forth, the left support part and the right support part can be divided into two parts after being disassembled, and can slide back and forth alternately, the sliding of the left support part and the right support part does not affect each other, and the moving trajectories of the left support part and the right support part can be different, so that the user's elbows can push the left support part and the right support part to do abdominal exercises such as moving back and forth alternately, with higher degree of freedom, higher practicality, and stronger functionality.

[0007] The detachable connecting mechanism includes a left plug-in tube, a right plug-in tube and a connecting tube. The left plug-in tube and the right plug-in tube are relatively arranged on the left supporting part and the right supporting part. The left plug-in tube and the right plug-in tube are both provided with locking holes. Retractable elastic fasteners are provided on the sides of both ends of the connecting tube. When the two ends of the connecting tube are inserted into the left plug-in tube and the right plug-in tube, the elastic fasteners are embedded in the locking holes. In this way, the connecting tube can be inserted into the left plug-in tube and the right plug-in tube, and the elastic fasteners can limit the separation of the connecting tube and the left plug-in tube and the right plug-in tube, thereby achieving a quick connection effect. When disassembly is required, it is only necessary to press the elastic fastener and pull out the connecting tube.

[0008] The front support component also includes a mounting seat, which is detachably arranged on the connecting tube. A mobile phone placement portion and / or a timer is provided on the mounting seat. The mobile phone placement portion can be used to place a mobile phone, which is more entertaining. The mobile phone can also assist in exercise, and the timer allows the user to observe the exercise time well.

[0009] Walking wheels are arranged at the bottom of the left supporting part and the bottom of the right supporting part.

[0010] A buffer kneeling pad is arranged on the top of the rear supporting component, an elbow support pad is arranged on the top of the left supporting part and the right supporting part, and armrests are arranged on the left supporting part and the right supporting part.

[0011] It also includes an adjustment mechanism, which is arranged on the rear support component, one end of the elastic rope is connected to the front support component, and the other end is connected to the adjustment mechanism, the adjustment mechanism is used to adjust the length of the elastic rope between the front support component and the rear support component, and the front support component can stretch the elastic rope to elastically deform the elastic rope when sliding forward, and by adjusting the length of the elastic rope between the front support component and the rear support component, the resistance of the elastic rope to the front support component when sliding forward can be increased or decreased, and the assistance of the elastic rope to the front support component when sliding backward can also be increased or decreased. By adjusting the length of the elastic rope between the front support component and the rear support component, it can also adapt to exercisers with different body shapes.

[0012] The adjusting mechanism includes a storage component, which can be rotatably or locked on the rear supporting component. The other end of the elastic rope is connected to the storage component. When the storage component rotates, the elastic rope can be stored on the storage component or released from the storage component. When the length of the elastic rope on the front supporting component and the rear supporting component needs to be increased, the storage component can be rotated to release the elastic rope. When the length of the elastic rope on the front supporting component and the rear supporting component needs to be shortened, the storage component can be rotated in the opposite direction to store the elastic rope on the storage component. The operation is convenient.

[0013] The adjusting mechanism further comprises an elastic member, wherein the top of the roll storage member is provided with a plurality of positioning grooves arranged at intervals around a circle, and the rear support member is provided with a plurality of positioning protrusions arranged at intervals around a circle which are matched with the positioning grooves. The roll storage member can be arranged on the rear support member to move up and down between a locking position and a rotatable position, and the elastic member drives the roll storage member to move upward to the locking position. When the roll storage member is in the locking position, the positioning groove and the positioning protrusion engage with each other to prevent the roll storage member from rotating. When the roll storage member is in the rotatable position, the positioning groove and the positioning protrusion separate from each other to prevent the roll storage member from rotating. In this way, when it is necessary to adjust the length of the elastic rope, it is only necessary to press the roll storage member downward to compress the elastic member, and the positioning protrusion disengages from the positioning groove, so that the roll storage member can be rotated. When the length of the elastic rope is adjusted to the desired length, the force applied to press down the roll storage member is cancelled, and the roll storage member is driven to the locking position by the elastic force of the elastic member, and the positioning protrusion and the positioning groove can engage with each other to restrict the roll storage member from rotating, so that the effect of quick adjustment can be achieved and the operation is convenient.

[0014] An operating portion is formed at the center of the top of the roll storage component, and an operating hole opposite to the operating portion is formed at the top of the rear support component. The operating hole allows a user to conveniently control the operating portion to operate the roll storage component.

[0015] The roll storage component includes a vertically extending limit rod, and the rear support component is formed with a limit hole for the lower end of the limit rod to pass through. The lower end of the limit rod is provided with a limit structure to prevent the limit rod from upwardly detaching from the limit hole, so that the roll storage component will not be driven by the elastic force of the elastic part to detach upward from the rear support component during installation, and the limit rod can also play a certain degree of guiding role when moving in the limit hole.

[0016] The elastic member is a coil spring, the coil storage component includes a positioning sleeve, the coil spring is sleeved on the positioning sleeve and is compressed between the coil storage component and the rear support component. The coil spring is sleeved on the positioning sleeve to facilitate product installation and prevent the coil spring from falling off.

[0017] The storage component includes a storage sleeve with an installation notch formed on the storage sleeve. One end of the elastic rope is connected to the front support component, and the other end passes through the installation notch and is provided with an anti-slip component larger than the installation notch, so that the elastic rope can be stored on the storage sleeve, and the anti-slip component can prevent the elastic rope from detaching from the storage sleeve.

[0018] The rear support component is provided with an annular positioning portion sleeved on the lower end of the storage sleeve. The annular positioning portion can play a positioning role when the product is installed, and can also limit the elastic rope on the storage sleeve.

[0019] It also includes two gripping handles, and the rear supporting component is provided with two adjusting mechanisms spaced apart on the left and right sides. A plurality of recessed portions corresponding to the positioning protrusions are formed on the top of the rear supporting component, and two plug-in portions that can be embedded in the recessed portions are formed on the bottom of the gripping handles. The gripping handles can be grasped by the user to perform push-up exercises, and the two plug-in portions can be embedded in the recessed portions at different angles to adjust the angles of the two gripping handles and perform different push-up exercises. The correspondence between the recessed portions and the positioning protrusions can make the structure more reasonable, more compact, and have lower production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the utility model.

[0021] Figure 2 It is a three-dimensional diagram from another perspective of the utility model.

[0022] Figure 3 It is a top view of the utility model.

[0023] Figure 4 for Figure 3 Section view along AA direction.

[0024] Figure 5 for Figure 4 Enlarged view of part A.

[0025] Figure 6 It is a structural schematic diagram of the roll storage component of the utility model.

[0026] Figure 7 It is a structural schematic diagram of the roll storage component of the utility model from another perspective.

[0027] Figure 8 This is an exploded view of the components of the present utility model.

[0028] Fig. 9 This is a component exploded view from another perspective of the present invention.

[0029] Fig.10 This is a schematic diagram of the utility model in which the left supporting part and the right supporting part are separated. DETAILED DESCRIPTION

[0030] Reference Figures 1 to 10As shown, a multifunctional training device includes a front support component 2, a rear support component 1, an elastic rope 4, an adjustment mechanism and a tension belt 6. The front support component 2 includes a left support part L and a right support part R arranged on the left and right sides. The left support part L and the right support part R are provided with a walking mechanism that can slide forward and backward, specifically a plurality of walking wheels 22 installed at the bottom of the left support part L and the right support part R. The top of the front support component 2 is provided with elbow support pads 21 distributed at intervals on the left and right sides, and the top of the rear support component 1 is provided with a cushioning kneeling pad 111. The user can kneel on the cushioning kneeling pad 111 with both elbows placed on the elbow support pad 21. The upper operation front support part 2 performs abdominal exercises by sliding forward and backward. The front ends of the left support part L and the right support part R are provided with armrests 23, which can be grasped by the user during exercise. The left support part L and the right support part R are both composed of a detachable main body 2A and a bottom cover 2B. The walking wheels 22 are arranged on the bottom cover 2B and can contact the ground. The left support part L and the right support part R are connected to each other through a detachable connecting mechanism. The detachable connecting mechanism includes a left plug-in tube 291, a right plug-in tube 292 and a connecting tube 28. The main body 2A is formed with a The mounting ring 293, the left plug-in tube 291 and the right plug-in tube 292 are relatively inserted in the mounting ring 293 and fixed by bolts. The left plug-in tube 291 and the right plug-in tube 292 are both provided with locking holes 294. The sides of both ends of the connecting tube 28 are both provided with retractable elastic fasteners 281. When the two ends of the connecting tube 28 are inserted into the left plug-in tube 291 and the right plug-in tube 292, the elastic fasteners 281 are embedded in the locking holes 294 to limit the connecting tube 281 from being separated from the left plug-in tube 291 and the right plug-in tube 292. In addition, a detachable mounting seat 24 is also sleeved on the connecting tube 28. The mounting seat 24 A mobile phone placement portion 25 and a timer 26 are provided on the top, which are convenient for users to place their mobile phones for auxiliary exercise and convenient for users to observe the timer 26 to determine the exercise time. After the connecting tube 28 is separated from the left plug-in tube 291 and the right plug-in tube 292, the left support part L and the right support part R can slide back and forth alternately, and the sliding of the left support part L and the right support part R does not affect each other, and the moving trajectories of the left support part L and the right support part R can be different, so that the user's elbows can push the left support part L and the right support part R to do abdominal exercises that move alternately back and forth, which has a higher degree of freedom, higher practicality and stronger functionality.

[0031] One end of the elastic rope 4 is connected to the front supporting part 2, and the other end is connected to the adjusting mechanism. A first installation notch 27 is formed at the rear end of the main body 2A of the left supporting part L and the right supporting part R, and two elastic ropes 4 are arranged at intervals. The elastic rope 4 is tubular, and the two ends of the elastic rope 4 are sleeved with a first anti-slip component 41 and a second anti-slip component 42. The first anti-slip component 41 passes through the first installation notch 27 and is connected to the main body 2A. The first anti-slip component 42 and the second anti-slip component 42 are specifically cylindrical wooden plugs. The size of the first anti-slip component 41 is larger than the first installation notch 27, and the diameter of the wooden plug is larger than the elastic rope 4. After installation, the first anti-slip component 41 passes through the first installation notch 27 and is blocked by the first installation notch 27 to prevent the elastic rope 4 from detaching from the left supporting part L and the right supporting part R.

[0032] The adjusting mechanism includes two symmetrically arranged ones, and the adjusting mechanism is arranged on the rear supporting component 1. The adjusting mechanism is used to adjust the length of the elastic rope 4 between the front supporting component 2 and the rear supporting component 1. By adjusting the length of the elastic rope 4 between the front supporting component 2 and the rear supporting component 1, the resistance of the elastic rope 4 to the front supporting component 2 when sliding forward can be increased or decreased, and the assisting force of the elastic rope 4 to the front supporting component 2 when sliding backward can also be increased or decreased. The adjusting mechanism includes a winding and storage component 3, and the winding and storage component 3 can be rotatably or locked on the rear supporting component 1. The other end of the elastic rope 4 is connected to the winding and storage component 3. When the winding and storage component 3 is rotated, the elastic rope 4 can be wound up and stored on the winding and storage component 3 or released from the winding and storage component 3. When the length of the elastic rope 4 at the front supporting component 2 and the rear supporting component 1 needs to be increased, the winding and storage component 3 can be rotated to release the elastic rope 4. When the length of the elastic rope 4 at the front supporting component 2 and the rear supporting component 1 needs to be shortened, the winding and storage component 3 can be rotated in the opposite direction to wind up and store the elastic rope 4 on the winding and storage component 3, which is easy to operate.

[0033] The adjustment mechanism also includes an elastic member 36. A plurality of positioning grooves 31 arranged at intervals in a circumference are provided on the top of the roll storage component 3. The rear support component 1 includes a detachable cover plate 11 and a bottom plate 12. An operating portion 32 is formed at the center of the top of the roll storage component 3, and an operating handle 321 is formed at the center of the operating portion 32. The cover plate 11 forms a clearance hole 114 opposite to the operating portion 32. The clearance hole 114 is circular, and the operating portion 32 is also circular to match the clearance hole 114. The operating hole 114 can be used to facilitate the user to control the operating handle 321 to rotate the roll storage component 3. The clearance hole 114 and the operating portion 32 are set in a circular shape for easy rotation. The cover plate 11 is formed with a plurality of positioning protrusions arranged at intervals in a circumference to match the positioning grooves 31. 112, the storage component 3 can be moved up and down between the cover plate 11 and the bottom plate 12 between the locking position and the rotatable position, and the elastic member 36 drives the storage component 3 to move upward to the locking position. When the storage component 3 is in the locking position, the positioning groove 31 and the positioning protrusion 112 are engaged with each other so that the storage component 3 cannot be rotated. When the storage component 3 is in the rotatable position, the positioning groove 31 and the positioning protrusion 112 are separated from each other so that the storage component 3 can be rotated. In this way, when it is necessary to adjust the length of the elastic cord 4, it is only necessary to press down the storage component 3 to compress the elastic member 36, and the positioning protrusion 112 and the positioning groove 31 are separated from each other, and the storage component 3 can be rotated. When the length of the elastic cord 4 is adjusted to the desired length, the force applied to press down the storage component 3 is cancelled, and the storage component 3 is The part 3 is driven to the locking position by the elastic force of the elastic part 36, and the positioning protrusion 112 and the positioning groove 31 can engage with each other to restrict the storage part 3 from rotating, which can achieve the effect of quick adjustment and is easy to operate. The elastic part 36 is a coil spring, and the storage part 3 is formed with a positioning sleeve 34. The coil spring is sleeved on the positioning sleeve 34 and is compressed between the storage part 3 and the bottom plate 12. The coil spring is sleeved on the positioning sleeve 34 to facilitate the installation of the product and prevent the coil spring from falling off. The storage part 3 is also formed with a storage sleeve 35. The diameter of the storage sleeve 35 is larger than the positioning sleeve 34. The storage sleeve 35 is coaxially arranged with the positioning sleeve 34. A second installation notch 33 is formed on the storage sleeve 35, and one end of the elastic rope 4 passes through The first mounting notch 27 is connected to the front support component 2, and the other end passes through the second mounting notch 33 to be connected to the storage sleeve 35. The size of the second anti-slipping member 42 is larger than the second mounting notch 33. The second anti-slipping member 42 is used to limit the elastic rope 4 from being separated from the storage sleeve 35. The storage component 3 includes a vertically extending limiting rod 37. The rear support component 1 is formed with a limiting hole 124 for the lower end of the limiting rod 37 to pass through. The lower end of the limiting rod 37 is provided with a limiting structure to prevent the limiting rod 37 from being separated from the limiting hole 124 upward. The limiting structure is a bolt 38 and a gasket 39. The limiting rod 37 is formed with a screw hole. After the limiting rod 37 is inserted into the limiting hole 124, the bolt 38 is connected to the limiting rod, and the gasket 39 is used to prevent the limiting rod 37 from being separated from the limiting hole 124 upward.In this way, during installation, the roll storage component 3 will not be driven upwardly away from the rear support component 1 by the elastic force of the elastic member 36, and the movement of the limiting rod 37 in the limiting hole 124 can also play a guiding role to a certain extent.

[0034] An annular positioning portion 121 is formed on the bottom plate 12 and is sleeved on the lower end of the winding sleeve 35 . The annular positioning portion 121 can play a positioning role when the product is installed, and can also limit the elastic rope 4 on the winding sleeve 35 .

[0035] It also includes two gripping handles 5 arranged on the two adjustment mechanisms. The top of the cover plate 11 is formed with a plurality of recessed portions 113 corresponding to the positioning protrusions 112. The bottom of the gripping handles 5 is formed with two plug-in portions 51 that can be embedded in the recessed portions 113. The gripping handles 5 can be grasped by the user to perform push-up exercises. The two plug-in portions 51 can be embedded in different specific recessed portions 113 to adjust the angles of the two gripping handles 5 and perform different push-up exercises. The correspondence between the recessed portions 113 and the positioning protrusions 112 can make the structure more reasonable, more compact, and have lower production costs.

[0036] A tension band mounting part is provided on both the left and right sides of the cover plate 11, and a tension band 6 is provided on the tension band mounting part. The bottom plate 12 is formed with a make way notch 122 for accommodating the tension band mounting part. The tension band mounting part is specifically a third mounting notch 115. The structure of the tension band 6 is the same as that of the elastic rope 4, both of which are tubular structures, and the end of the tension band 6 is also provided with a tension band anti-slip part 61 which is the same as the elastic rope 4. The tension band anti-slip part 61 cooperates with the third mounting notch 115 to prevent the tension band 6 from detaching. The user can stand on the rear support component 1 and pull the tension band 6 upwards to exercise the hand muscles.

[0037] The exercise effects achievable by the utility model include:

[0038] Bend over and place both elbows on the left support part L and the right support part R, kneel on the rear support part 1, and push the left support part L and the right support part R to slide back and forth to strengthen the abdomen; after removing the connecting pipe, separate the left support part L and the right support part R, bend over and place both elbows on the left support part L and the right support part R, kneel on the rear support part 1, and push the left support part L and the right support part R to slide back and forth alternately; place the feet on the left support part L and the right support part R, support the ground with both hands or both elbows, and push the left support part L and the right support part R to slide back and forth alternately with the feet. You can choose different exercise methods according to your own needs to exercise muscles in different parts.

[0039] The above description is only a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of implementation of the present utility model. That is, equivalent changes and modifications made according to the scope of the patent application of the present utility model and the contents of the specification should still fall within the scope covered by the patent of the present utility model.

Claims

1. A multifunctional training device, characterized in that: It includes a front support component, a rear support component, and an elastic rope. The front support component is provided with a walking mechanism that can slide forward and backward. One end of the elastic rope is connected to the front support component, and the other end is connected to the rear support component. The front support component includes a left support part and a right support part, and the left support part and the right support part are connected to each other through a detachable connecting mechanism.

2. A multifunctional training device according to claim 1, characterized in that: The detachable connecting mechanism includes a left plug-in tube, a right plug-in tube and a connecting tube. The left plug-in tube and the right plug-in tube are relatively arranged on the left supporting part and the right supporting part. The left plug-in tube and the right plug-in tube are both provided with locking holes. Retractable elastic fasteners are provided on the sides of both ends of the connecting tube. When the two ends of the connecting tube are inserted into the left plug-in tube and the right plug-in tube, the elastic fasteners are embedded in the locking holes.

3. A multifunctional training device according to claim 2, characterized in that: The front support component also includes a mounting seat, which is detachably arranged on the connecting tube, and a mobile phone placement portion and / or a timer is arranged on the mounting seat.

4. A multifunctional training device according to claim 1, characterized in that: Walking wheels are arranged at the bottom of the left supporting part and the bottom of the right supporting part.

5. A multifunctional training device according to claim 1, characterized in that: A buffer kneeling pad is arranged on the top of the rear supporting component, an elbow support pad is arranged on the top of the left supporting part and the right supporting part, and armrests are arranged on the left supporting part and the right supporting part.

6. A multifunctional training device according to any one of claims 1 to 5, characterized in that: It also includes an adjustment mechanism, which is arranged on the rear support component. One end of the elastic rope is connected to the front support component, and the other end is connected to the adjustment mechanism. The adjustment mechanism is used to adjust the length of the elastic rope between the front support component and the rear support component.

7. A multifunctional training device according to claim 6, characterized in that: The adjusting mechanism comprises a storage component, which is rotatably or lockably arranged on the rear supporting component, and the other end of the elastic cord is connected to the storage component. When the storage component rotates, the elastic cord can be stored on the storage component or released from the storage component.

8. A multifunctional training device according to claim 7, characterized in that: The adjusting mechanism also includes an elastic member, a top of the roll storage member is provided with a plurality of positioning grooves arranged at circumferential intervals, the rear support member is provided with a plurality of positioning protrusions arranged at circumferential intervals and matched with the positioning grooves, the roll storage member can be arranged on the rear support member so as to be movable up and down between a locked position and a rotatable position, the elastic member drives the roll storage member to move upward to the locked position, when the roll storage member is in the locked position, the positioning groove and the positioning protrusion are engaged with each other so that the roll storage member cannot rotate, and when the roll storage member is in the rotatable position, the positioning groove and the positioning protrusion are separated from each other so that the roll storage member can rotate.

9. A multifunctional training device according to claim 7, characterized in that: An operating portion is formed at the center of the top of the stocker component, and an operating hole opposite to the operating portion is formed at the top of the rear supporting component.

10. A multifunctional training device according to claim 8, characterized in that: The roll storage component includes a vertically extending limiting rod, the rear support component is formed with a limiting hole for the lower end of the limiting rod to pass through, and the lower end of the limiting rod is provided with a limiting structure to prevent the limiting rod from upwardly escaping from the limiting hole.

11. A multifunctional training device according to claim 8, characterized in that: The elastic member is a coil spring, the roll storage component includes a positioning sleeve, and the coil spring is sleeved on the positioning sleeve and is compressed between the roll storage component and the rear supporting component.

12. A multifunctional training device according to claim 8, characterized in that: The winding storage component comprises a winding storage sleeve, a mounting notch is formed on the winding storage sleeve, one end of the elastic rope is connected to the front supporting component, and the other end passes through the mounting notch and is provided with an anti-dropping member larger than the mounting notch.

13. A multifunctional training device according to claim 12, characterized in that: The rear supporting component is provided with an annular positioning portion sleeved on the lower end of the storage sleeve.

14. A multifunctional training device according to claim 8, characterized in that: It also includes two gripping handles, the rear support component is provided with two adjustment mechanisms spaced apart on the left and right, the top of the rear support component is formed with a plurality of recessed parts corresponding to the positioning protrusions, and the bottom of the gripping handle is formed with two plug-in parts that can be embedded in the recessed parts.

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