阅读说明：本技术 一种内驱动助力的健腹轮 (Exercise wheel with internal driving power ) 是由 施可安 于 2019-04-21 设计创作，主要内容包括：本发明涉及玩具、健身器具技术领域,尤其涉及一种内驱动助力的健腹轮。包括滚轮,左把手、右把手,滚轮为圆柱滚轮结构,左侧轴心位置设置左把手,右侧轴心位置设置右把手,其中：所述滚轮的内腔中在中轴线位置设置有支撑轴,滚轮和支撑轴是空转的轴承式结构,支撑轴上设置有电机座,电机座上设置驱动电机,绕圆形的内腔一周设置有滚动法兰片,所述滚动法兰片为环状结构,滚动法兰片的外圈和滚轮的内壁连接固定,滚动法兰片的内圈绕一周设置轮齿,所述驱动电机头端设置齿轴,齿轴和轮齿啮合,驱动电机转动齿轴转动进而驱动滚动法兰片驱动,从而带动滚轮正时针转动或逆时针转动；左把手或右把手上还设置有控制按钮,控制按钮电连接驱动电机。(The invention relates to the technical field of toys and fitness equipment, in particular to an internal drive power-assisted abdomen building wheel. Including the gyro wheel, left side handle, right side handle, the gyro wheel is cylinder gyro wheel structure, and left side axle center position sets up left side handle, and right side axle center position sets up right side handle, wherein: the inner cavity of the roller is provided with a support shaft at the central axis position, the roller and the support shaft are in idle bearing type structures, the support shaft is provided with a motor base, the motor base is provided with a driving motor, a rolling flange sheet is arranged around the circular inner cavity in a circle, the rolling flange sheet is in an annular structure, the outer ring of the rolling flange sheet is fixedly connected with the inner wall of the roller, the inner ring of the rolling flange sheet is provided with gear teeth around the circle, the head end of the driving motor is provided with a gear shaft, the gear shaft is meshed with the gear teeth, and the driving motor rotates the gear shaft to drive the rolling flange sheet to rotate so as to drive the roller to rotate clockwise or; and the left handle or the right handle is also provided with a control button which is electrically connected with a driving motor.)

1. The utility model provides an exercise wheel of interior drive helping hand, includes the gyro wheel, left side handle, right side handle, and the gyro wheel is cylinder gyro wheel structure, and left side axle center position sets up left handle, and right side axle center position sets up right handle, characterized by: the inner cavity of the roller is provided with a support shaft at the central axis position, the roller and the support shaft are in idle bearing type structures, the support shaft is provided with a motor base, the motor base is provided with a driving motor, a rolling flange sheet is arranged around the circular inner cavity in a circle, the rolling flange sheet is in an annular structure, the outer ring of the rolling flange sheet is fixedly connected with the inner wall of the roller, the inner ring of the rolling flange sheet is provided with gear teeth around the circle, the head end of the driving motor is provided with a gear shaft, the gear shaft is meshed with the gear teeth, and the driving motor rotates the gear shaft to drive the rolling flange sheet to rotate so as to drive the roller to rotate clockwise or; and the left handle or the right handle is also provided with a control button, the control button is electrically connected with the driving motor, and the control button controls the driving motor to be turned on or turned off.

2. An internally powered abdominal exercise wheel as in claim 1, wherein: the back shaft includes central siphon and battery compartment, and central siphon and battery compartment an organic whole set up or cup joint the setting, and the battery compartment sets up battery, motor control board, and battery and control button, motor control board, driving motor carry out the electricity and connect.

3. An internally powered exercise wheel as claimed in claim 2, wherein: the motor control panel is provided with a timer, and the timer is electrically connected with the switch button.

4. An internally powered abdominal exercise wheel as in claim 1, wherein: the equidistant fretwork of outer lane of rolling flange piece sets up a plurality of semicircle locating holes, as the matching the gyro wheel is provided with a plurality of screw posts, semicircle locating hole buckle screw post around closing inner wall a week.

5. An internally powered exercise wheel as claimed in claim 1 or claim 4 wherein: the gyro wheel includes left wheel cap and right wheel cap, all is the cell body structure, and both symmetry amalgamations of left wheel cap and right wheel cap, inside hollow structure after the amalgamation are the inner chamber, the axle center position of left side wheel cap and right wheel cap sets up the handle socket, and left handle, right handle insert behind the handle socket and with the supporting shaft be connected.

6. An internally powered abdominal exercise wheel as in claim 5, wherein: the outer walls of the outer sides of the left wheel cover and the right wheel cover are inwards concave towards the handle socket to form an inner concave-convex groove.

7. An internally powered abdominal exercise wheel as in claim 5, wherein: the cross sections of the left wheel cover and the right wheel cover are of a trapezoid structure, and the outer wall of the left wheel cover and the right wheel cover is wrapped with a wear-resistant rubber sleeve with the same section shape being of the trapezoid structure.

8. An internally powered abdominal exercise wheel as in claim 5, wherein: the left wheel cover and the right wheel cover are provided with at least 1-3 cm-wide grooves in the inner side shell in a concave mode, and the left wheel cover and the right wheel cover are spliced to form a rolling groove.

9. An internally powered exercise wheel as claimed in claim 2, wherein: the battery compartment is in the central siphon, and the central siphon includes the square shaft pipe of central authorities to and the circle shaft pipe of both sides, both an organic whole sets up.

10. An internally powered exercise wheel as claimed in claim 2, wherein: the outer wall of the shaft tube is sleeved with a ball ring around the circumference, the ball ring and an annular tube body structure of a hand socket sleeved on the ball ring and the shaft tube form a bearing type structure after being combined, the roller and the shaft tube form idle rotation, and the shaft tube and the tube body of the left handle and the right handle inserted into the shaft tube are fixed by a sheath nail to prevent displacement or extraction after being assembled.

Technical Field

The invention relates to the technical field of toys and fitness equipment, in particular to an internal drive power-assisted abdomen building wheel.

Background

The single-wheel abdomen building wheel is a traditional abdomen building wheel, generally has a Chinese character 'zhong' shaped structure, a roller with a central cylinder shape and handles arranged on two sides of the roller, a user lies on the ground, and holds one handle by two hands to push forwards to a position beyond the top of the head and pull backwards to an abdomen position on the ground, so as to achieve the exercise technical action of exercising arms and abdomen.

Disclosure of Invention

Based on the technical problems in the background art, the invention provides an internal drive power-assisted exercise wheel, which can set conditions according to self electronic control and power drive to achieve stable forward pushing or backward pulling power-assisted action and achieve different exercise rhythms.

The invention provides an internal driving power-assisted exercise wheel, which is realized by the following implementation mode:

the utility model provides an exercise wheel of interior drive helping hand, includes the gyro wheel, left side handle, right side handle, and the gyro wheel is cylinder gyro wheel structure, and left side axle center position sets up left handle, and right side axle center position sets up right handle, wherein: the inner cavity of the roller is provided with a support shaft at the central axis position, the roller and the support shaft are in idle bearing type structures, the support shaft is provided with a motor base, the motor base is provided with a driving motor, a rolling flange sheet is arranged around the circular inner cavity in a circle, the rolling flange sheet is in an annular structure, the outer ring of the rolling flange sheet is fixedly connected with the inner wall of the roller, the inner ring of the rolling flange sheet is provided with gear teeth around the circle, the head end of the driving motor is provided with a gear shaft, the gear shaft is meshed with the gear teeth, and the driving motor rotates the gear shaft to drive the rolling flange sheet to rotate so as to drive the roller to rotate clockwise or; and the left handle or the right handle is also provided with a control button, the control button is electrically connected with the driving motor, and the control button controls the driving motor to be turned on or turned off. The switch button controls the power on or off of the driving motor through the switch button so as to realize the forward rolling or backward rolling of the roller and the related rolling speed.

As preferred the back shaft includes central siphon and battery compartment, and central siphon and battery compartment are integrative to be set up or cup joint the setting, and the battery compartment sets up battery, motor control panel, and battery and control button, motor control panel, driving motor carry out the electricity and connect.

Preferably, the motor control board is provided with a timer, and the timer is electrically connected with the switch button. The time control effect of automatic power off or clockwise driving during standing can be achieved through the program control of the timer.

Preferably, a plurality of semicircular positioning holes are arranged in the outer ring of the rolling flange piece in a hollow mode at equal intervals, a plurality of screw columns are arranged around the inner wall of the rolling wheel in a matched mode, and the screw columns are buckled through the semicircular positioning holes. The structure can enable the transmission force to be transmitted to the rolling flange piece from the driving power and then continuously transmitted to the inner wall of the roller shell, so that the driving force can be converted into the rotation capacity of the roller to the maximum extent, and the situation that the connection is not firm or the connection is smooth due to the fact that the driving force is in contact with a smooth structure or other nested structures is avoided.

As preferred the gyro wheel includes left wheel lid and right wheel lid, all is the cell body structure, and both symmetries amalgamation of left wheel lid and right wheel lid, inside hollow structure after the amalgamation is the inner chamber, the axle center position of left wheel lid and right wheel lid sets up the handle socket, and left handle, right handle insert behind the handle socket and with the supporting shaft be connected. The structure enables the connection to be simple, and the structure of the connection of the inserted left handle, the inserted right handle and the supporting shaft can strengthen the connection structure of the symmetrical splicing of the left wheel cover and the right wheel cover at the position of the axis, so that the connection structure is not lost.

Preferably, the cross sections of the left wheel cover and the right wheel cover are in a trapezoid structure, and the outer wall of the left wheel cover and the right wheel cover is wrapped with a wear-resistant rubber sleeve with the same section shape in the trapezoid structure.

Preferably, the inner side shells of the left wheel cover and the right wheel cover are concavely provided with grooves with at least 1-3 cm of width, and the left wheel cover and the right wheel cover are spliced to form a rolling groove. The rolling groove is formed in a mode that the rolling groove is matched with the double-cone structure with the two oblique sides, and the rolling groove is filled with the wear-resistant rubber sleeve, so that the phenomenon that a human body presses the product downwards and the pressure of the ground recoil to the center can be isolated, the structure can enable the stress of the center to be dispersed towards the two sides to be pressed downwards as much as possible, and the center of the supporting shaft cannot bear the maximum stress like the prior art.

Preferably, the shaft tube I is welded with the battery bin integrally from left to right. This kind of mode can make each subassembly of gyro wheel inner chamber integrate compacter with whole inner structure more, can regard as the container with battery protection and mounting structure for strong structure moreover for battery protectiveness is better.

Preferably, the battery compartment is arranged in the shaft tube, the shaft tube comprises a square shaft tube in the center and round shaft tubes on two sides, and the square shaft tube and the round shaft tubes are integrally arranged.

The outmost side of the round shaft tube is preferably arranged to be flush with the hand socket, and the inner wall of the round shaft tube is provided with a buckle structure. The handle socket structure that left wheel lid and right wheel lid that such setting can prevent to prop the plastics material of splitting after the handle inserts corresponds the setting.

Preferably, the outer side outer walls of the left wheel cover and the right wheel cover are inwards concave towards the handle inserting opening to form an inner groove. The structure can form an inwards concave sand leakage structure to strengthen the bearing capacity of the center when seen from the outside, and a pedestal structure capable of fixing and clamping the flange gear ring is formed inside, so that the transmission capacity of the flange gear ring is strengthened, and the phenomenon that power is lost in transmission or the transmission is too large to cause the connection of an auxiliary structure because of the damage of a plastic structure is avoided.

Preferably, the outer wall of the shaft tube is sleeved with the ball ring in a circle, the ball ring and an annular tube body structure of the hand insertion opening sleeved on the ball ring are combined to form a bearing type structure, the roller and the shaft tube are allowed to idle, and the shaft tube and the tube bodies of the left handle and the right handle inserted into the shaft tube are fixed by the sheath nails to prevent displacement or extraction after being assembled. The structure is easy to assemble, the structure is firm, and the rolling structure is not easy to damage.

Compared with the prior art, the invention has the beneficial effects that: 1. the structure is compact, the front rotation or the rear rotation can be completely and electrically controlled, the electric type is carried out under the condition that the motor is combined with a flange gear ring to drive the roller, the rotating speed of the roller can be planned in advance and controlled, the maximum rotating and pushing or pulling actions in the abdomen strengthening movement can be controlled to correspond to the maximum rolling and rotating angle of the roller, such as 360-400 degrees, so that the phenomenon that the abdomen is pulled due to excessive forward extension with high danger or the head gravity center is unbalanced due to excessive backward extension when the abdomen strengthening movement is carried out and the dangerous exercise conditions such as impacting the ground can be avoided;

2. the degree of automation is high, and in addition to automatically carrying out balanced movement, the control of movement can be carried out through a timer, for example, actions such as standing for 1 action and then carrying out automatic pull-back for 3 seconds are carried out to avoid and help people to carry out exercise actions.

3. The axis is strong and stable, do not rely on the two-wheeled to come the stress in the middle of the compartment or too rely on adding too thick increase cost of too much subassembly or axis pipe fitting in the middle part like prior art, because middle if overweight will increase the wrist burden, the abdomen exercise wheel is the exercise belly, the wrist is taken exercise and is not needed or will reduce the wrist activity and come more activities of carrying out the waist of people, so the integrative structure of battery compartment and central siphon can compacter and the focus is in the axis, in addition still cooperate this kind of wall structure that the middle behind the gyro wheel combination is provided with one section 2~6 cm's recess to cut off the stress that can reduce central authorities, reduce weight strength burden, can protect middle electronic structure again.

Drawings

Fig. 1 is a front view of the overall structure.

Fig. 2 is a front anatomical structure view.

FIG. 3 is a view of the roller housing with the internal mechanism removed.

Fig. 4 is a view showing a rolling flange piece.

Fig. 5 is a view showing a rolling flange piece and a driving structure.

FIG. 6 is a schematic diagram of the driving principle of the integral connection of the rolling flange plate and the right wheel cover.

Fig. 7 is a schematic front view of a rolling flange plate driving roller.

FIG. 8 is a schematic view of the left and right wheel cover assemblies and their components.

Fig. 9 is a connection structure view of the right wheel cover combination handle.

FIG. 10 is a schematic view of the assembly of the flanged gear ring and the drive structure.

In the figure: the roller wheel comprises a roller wheel 1, a left handle 2, a right handle 3, an inner cavity 4, a supporting shaft 5, a motor base 6, a driving motor 7, a rolling flange sheet 8, an inner ring 9, gear teeth 10, a gear shaft 11, a control button 12, a shaft tube 13, a battery compartment 14, a motor control panel 16, a timer 17, a semicircular positioning hole 18, a screw column 19, a left wheel cover 20, a right wheel cover 21, a handle socket 22, a wear-resistant rubber sleeve 23, a rolling groove 24, a square shaft tube 25, a round shaft tube 26, an inner groove 27 and a ball ring 28.

Detailed Description

The technical scheme of the invention is described in detail as the optimization by the embodiment and the attached drawings:

the following embodiments refer to the orientation shown in the drawings, the connection structure is integrally formed, clamped, connected and hinged in the prior art unless otherwise specified, the main structure of the roller is formed by blow molding and injection molding of plastic, the shaft tube and the dynamic structure are metal structures, the manufacturing process mainly includes the steps of direct casting, cutting, bending, drilling and the like in the prior art to form the main structure or the structure can be known by the prior art, the shape described in the manufacturing and structure text mainly refers to the shape and the structure content shown in the drawings, and the structure for realizing the purpose of the invention is not a connection mode which is well understood by the prior art;

the invention creates the proposed structure, which is realized by the following implementation modes: an internal driving power-assisted exercise wheel as shown in fig. 1 comprises a roller 1, a left handle 2 and a right handle 3, wherein the roller 1 is a cylindrical roller structure, the circular roller is generally a hollow structure, in the prior art, control structures are added into the hollow structure, such as a reset spring structure or a stop structure with excessive torsion, and the like, and then corresponding jacks are arranged on the left and right of the roller, and are arranged corresponding to the following axial center positions: a left handle 2 is arranged at the left side axis position, a right handle 3 is arranged at the right side axis position, the left handle 2 and the right handle 3 are connected with an important shaft tube, and the shaft tube and a roller wound on the shaft tube are in idle running structures (bearing type structures) to form a structure capable of rolling back and forth, namely a bearing structure is arranged when the shaft tubes of the handle and the roller are inserted; when the user exercises, the left handle 2 and the right handle 3 are held and pushed forwards or pulled backwards to roll forwards and backwards; the above-mentioned structure is the structure that the prior art exercise wheel inevitably has and must realize;

wherein: a support shaft 5 is arranged in the central axis position in an inner cavity 4 of the roller 1, the roller 1 and the support shaft 5 are idle bearing type structures, the support shaft can be arranged into two forms aiming at different battery bin structures, a hollow square round pipe body structure can correspondingly place a lithium battery into the support shaft, or a battery box is arranged on the surface of the support shaft for placing the battery, the support shaft is prevented from being arranged inside as shown in figure 2, and the convenient assembly and replacement can be realized by opening 1 shell on the outer wall;

as shown in the figure, the surface of the supporting shaft is provided with a motor seat 6, as shown in the figure, the supporting shaft is of a U-shaped metal fixing sleeve structure, and the motor seat 6 is provided with a driving motor 7 to bind the driving motor on the seat, which is similar to the existing water pump motor structure;

as shown in fig. 3-4, a rolling flange sheet 8 is arranged around the circular inner cavity 4, the rolling flange sheet 8 is of an annular structure, an outer ring of the rolling flange sheet 8 is fixedly connected with an inner wall of the roller 1 (shown in fig. 6-7), gear teeth 10 are arranged around an inner ring 9 of the rolling flange sheet 8, a gear shaft 11 is arranged at the head end of the driving motor 7, the gear shaft 11 is meshed with the gear teeth 10, and the driving motor 7 rotates the gear shaft 11 to rotate so as to drive the rolling flange sheet 8 to drive;

further, as shown in fig. 3 and 5-7, which is a driving structure of an internal gear in the prior art, a plurality of semicircular positioning holes 18 are hollowed out at equal intervals on the outer ring of the rolling flange piece 8, a plurality of screw posts 19 are arranged around the inner wall of the rolling wheel 1 for matching, the structure corresponds to the following structure, and the connecting structure component of the splicing structure of the left wheel cover 20 and the right wheel cover 21 at the lower part, the semicircular positioning hole 18 is buckled with the screw column 19, the structure can enable the transmission force to be transmitted to the rolling flange piece 8 from the driving power, and then the transmission force is continuously transmitted to the inner wall of the shell of the roller 1, so that the driving force can be converted into the rotation capability of the roller 1 to the maximum extent, namely, the roller 1 is driven to rotate clockwise or anticlockwise, the roller is controlled to rotate at a constant speed in an electric mode, and the stalling condition caused by the error of exercise action due to the gravity center of a human body or manual operation can be avoided; because the connecting structure is of a card type structure, the connection is not firm or the connection is smooth due to the fact that the connecting structure is in contact with a smooth structure or other nesting structures;

after further realizing the structure of the electric fixing mode, we need to perform programmed electronic control on the electric driving mode, a control button 12 is further arranged on the left handle 2 or the right handle 3, the control button 12 is electrically connected with the driving motor 7, and the control button 12 controls the driving motor 7 to be turned on or turned off. The switch button controls the power on or off of the driving motor through the switch button so as to realize the forward rolling or backward rolling of the roller and the related rolling speed. As shown in fig. 1 and 2, a pressure type button switch is arranged on the left handle 2 or the right handle 3 as a control button 12, the control button 12 is electrically connected with the driving motor 7, and the control button 12 controls the driving motor 7 to be switched on or off. The switch button controls the power on or off of the driving motor through the switch button to realize the forward rolling or backward movement of the roller and the related rolling speed, for example, when the control button 12 is set to be pressed (because the pressure type button is used to press the start switch when clenching the fist, the switch is closed when unclamping, and the control button is generally set to the forefinger position by matching with human engineering), the battery compartment structure can be set to be outside the compartment as can be thought in the prior art at any time, but to be inside the tube body, that is, the support shaft comprises the shaft tube 13 and the battery compartment 14, the shaft tube 13 and the battery compartment 14 are integrally set or sleeved, the battery compartment 14 is provided with a battery, the outer shell of the outer wall is provided with a motor control panel 16, the battery and the control button 12, the motor control panel 16 and the driving motor 7 are electrically connected, the motor control board 16 will control the buttons and; the driving motor is electrified (the circuit from the battery and the button to the driving motor is switched on, and the driving motor obtains electric energy) to drive the gear shaft 11 at the head end of the driving shaft of the driving motor to rotate anticlockwise, and a user keeps a posture that the handle is held by both hands in action, so that the front body of a human body is automatically driven to extend forwards by the rotation of the roller wheel, the speed is uniform in the extending process, and enough support is provided for the human body, so that the condition that the exercise wheel is used in the past, the exercise wheel is suddenly pushed forwards to the arm at a very high speed to extend the longest can not occur, and the muscle at the tail end of the arm and the muscle at the abdomen can be pulled to cause the muscle pulling injury at the two positions under the condition;

further still, the motor control board 16 is provided with a timer 17, and the timer 17 is electrically connected to the switch button. The time control effect of automatic power off or clockwise driving during standing can be achieved through the program control of the timer, for example, if the exercise wheel pulls the exercise wheel to the lower part of the abdomen of the exercise wheel to stand for 3 seconds after the exercise wheel stands for 1 action, the timer can automatically send out an electric signal to switch on the motor control panel 16, the control button and the driving motor, the driving motor rotates clockwise, thereby driving the roller to rotate anticlockwise, therefore, the exercise wheel can be automatically pushed forwards, and the user can automatically follow the action, and the speed is very uniform during the action, so that products that avoid dangerous movements that may be created by a too violent movement of the human body, if the setting is reversed, when the person is in the maximum stretching action, the driving motor can rotate and roll to realize actions such as automatic pull-back and the like to avoid and help people to perform exercise actions, wherein the actions mainly refer to the situation that the person cannot be pulled back by the maximum force after being tired to assist the person.

The inboard shell of left side wheel cap 20 and right wheel cap 21 is recessed to set up 1~3cm recess of at least width, and both amalgamation form slot for a roll 24. The rolling groove is formed in a mode that the rolling groove is matched with the double-cone structure with the two oblique sides, and the rolling groove is filled with the wear-resistant rubber sleeve, so that the phenomenon that a human body presses the product downwards and the pressure of the ground recoil to the center can be isolated, the structure can enable the stress of the center to be dispersed towards the two sides to be pressed downwards as much as possible, and the center of the supporting shaft cannot bear the maximum stress like the prior art.

As shown in fig. 5, 6 and 9, the roller 1 preferably includes a left wheel cover 20 and a right wheel cover 21, both of which are of a groove structure, the left wheel cover 20 and the right wheel cover 21 are symmetrically spliced together, after splicing, the aforementioned screw posts 19 are spliced together, and as shown in fig. 9, the outer walls of the left wheel cover 20 and the right wheel cover 21 are communicated with the screw posts, so that screws are correspondingly arranged to completely splice the left wheel cover 20 and the right wheel cover 21;

the inside hollow structure after the amalgamation is inner chamber 4, the axle center position of left wheel lid 20 and right wheel lid 21 sets up handle socket 22, and left handle 2, right handle 3 insert behind handle socket 22 and are connected with back shaft 5. The structure enables the connection to be simple, and the structure for connecting the inserted left handle 2, the inserted right handle 3 and the support shaft 5 can strengthen the connection structure for symmetrically splicing the left wheel cover 20 and the right wheel cover 21 at the axis position and prevent the connection structure from dissipating.

Preferably, the cross sections of the left wheel cover 20 and the right wheel cover 21 are in a trapezoid structure, and the outer wall of the left wheel cover and the right wheel cover is wrapped with a wear-resistant rubber sleeve 23 with the same cross section shape in the trapezoid structure.

Preferably, the shaft tube 13 is welded to the battery compartment 14. This kind of mode can make each subassembly of gyro wheel inner chamber integrate compacter with whole inner structure more, can regard as the container with battery protection and mounting structure for strong structure moreover for battery protectiveness is better.

Preferably, the battery compartment 14 is in a shaft tube, which includes a central square shaft tube 25 and two side round shaft tubes 26, which are integrally formed.

Preferably, the outermost side of the shaft tube 26 is flush with the hand insertion opening 22, and the inner wall is provided with a snap structure. The handle socket structure that left wheel lid and right wheel lid that such setting can prevent to prop the plastics material of splitting after the handle inserts corresponds the setting.

Preferably, the outer walls of the left wheel cover 20 and the right wheel cover 21 are recessed into the handle insertion opening to form an inner groove 27. The structure can form an inwards concave sand leakage structure to strengthen the bearing capacity of the center when seen from the outside, and a pedestal structure capable of fixing and clamping the flange gear ring is formed inside, so that the transmission capacity of the flange gear ring is strengthened, and the phenomenon that power is lost in transmission or the transmission is too large to cause the connection of an auxiliary structure because of the damage of a plastic structure is avoided.

Preferably, the ball ring 28 is sleeved on the outer wall of the shaft tube 13, the ball ring and the annular tube structure of the hand insertion opening 22 sleeved on the ball ring and the shaft tube 13 are combined to form a bearing type structure, so that the roller and the shaft tube 13 form idle rotation, and the shaft tube 13 and the tubes of the left handle 2 and the right handle 3 inserted into the shaft tube are fixed by the sheath nails to prevent displacement or extraction after being assembled. The structure is easy to assemble, the structure is firm, and the rolling structure is not easy to damage.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.