Electric stretching trainer

Abstract

The invention belongs to the technical field of leg stretching fitness equipment, and particularly relates to an electric stretching trainer which comprises a rack and a pushing part, a pushing plate is arranged on the pushing part, a driving motor and a transmission device are arranged on the rack, and the driving motor can drive the pushing part to move towards the side face of the rack through the transmission device. A push plate on the push piece is far away from or close to the rack, so that the body part of the user is driven to move; the rack is further provided with a controller used for controlling the driving motor, the driving motor is provided with a current sensor used for detecting current in the driving motor, and the controller can control the maximum movement distance of the pushing piece through the current sensor. The driving motor can rotate forwards and backwards under the action of the controller; according to the electric tendon stretching training device, the load is checked, the motor is driven to rotate forwards and backwards, and therefore a push plate on the push piece reciprocates at the position with the maximum movement distance, and the electric tendon stretching training device is high in safety and convenient for a user to exercise.

Description

Technical Field

[0001] The present invention belongs to the technical field of leg stretching fitness equipment, and particularly relates to an electric stretching trainer. Background Art

[0002] A stretching trainer is a fitness equipment used to assist users in performing the splits exercise, which can improve the flexibility and agility of users and can also improve body posture and stance.

[0003] Most of the stretching trainers on the market include a support frame, on which a first leg-opening member and a second leg-opening member are hinged. During use, the opening angles of the first leg-opening member and the second leg-opening member are controlled by an adjusting mechanism. For example, a leg opener disclosed in Chinese Utility Model Patent CN 202221846064.X includes a support frame, a seat provided on the support frame, a first leg-opening member and a second leg-opening member with one end hinged to the support frame; and the ends of the first leg-opening member and the second leg-opening member close to the seat are hinged to the support frame and can perform a lateral rotation movement relative to the seat; wherein, an adjusting mechanism for adjusting the opening angles of the first leg-opening member and the second leg-opening member is provided on the support frame; the adjusting mechanism includes a first transmission rod connected between the first leg-opening member and the support frame and movable along the length direction of the support frame, a second transmission connected between the second leg-opening member and the support frame and movable along the length direction of the support frame, and a stroke adjusting assembly for adjusting the moving strokes of the first transmission rod and the second transmission rod on the support frame.

[0004] The above structure is simple and convenient for users to use and control. However, during use, users can only control the relative opening of the first leg-opening member and the second leg-opening member through the stroke adjusting assembly. During the use by beginners, it is easy to cause muscle and ligament strains of users, and the safety is relatively poor. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of the present invention is to provide an electric stretching trainer with high safety and convenient for users to exercise.

[0006] The purpose of the present invention is realized as follows: An electric stretching trainer includes a frame and a pushing member. A push plate is provided on the pushing member. A driving motor and a transmission device are provided on the frame. The driving motor can drive the pushing member to move towards the side of the frame through the transmission device, and make the push plate on the pushing member move away from or close to the frame, thereby driving the movement of the body part of the user; A controller for controlling the drive motor is further provided on the frame, and a current sensor for detecting the current in the drive motor is provided on the drive motor. The controller can judge the working state of the first drive motor through the current sensor, so as to control the maximum movement distance of the pushing member according to the working state of the drive motor and avoid muscle and ligament strains of the user. The drive motor can rotate forward and backward under the action of the controller; when reaching the rated load, the drive motor rotates forward and backward, so that the push plate on the pushing member reciprocates at the maximum movement distance position.

[0007] The present invention is further configured as: an adjusting device is provided on the controller, and the set value of the current sensor can be adjusted through the adjusting device, so as to control the maximum resistance received by the side push rod during use.

[0008] The present invention is further configured as: the pushing member includes two side push rods, the transmission device includes a first transmission device, and the drive motor can drive the two side push rods to move synchronously to both sides of the frame through the first transmission device, and make the push plates on the two side push rods move away from each other, so as to push the user's legs to spread out laterally to both sides.

[0009] The present invention is further configured as: the pushing member includes a longitudinal push member, the transmission device includes a second transmission device, and the drive motor can drive the longitudinal push member to move longitudinally up and down through the second transmission device, so as to drive the user's body part to move up or down.

[0010] The present invention is further configured as: the transmission device includes a first screw rod rotatably provided on the frame, and a first driving block adapted to the first screw rod is provided on the pushing member. The drive motor drives the first screw rod to rotate, and drives the first driving block to move through the first screw rod, so as to drive the pushing member to move relative to the frame.

[0011] The present invention is further configured as: at least two guide rods detachably provided on the first driving block are provided on the pushing member, guide holes adapted to the guide rods are provided on the frame, the guide rods pass through the guide holes and extend to the side of the frame, and the push plate is provided on the guide rods and is located on the side of the guide hole away from the first driving block.

[0012] The present invention is further configured as: the transmission device includes a telescopic device, the telescopic device includes a plurality of telescopic units, the telescopic unit includes two telescopic connecting rods hinged in an X shape, and the drive motor drives the two telescopic connecting rods in the telescopic unit to rotate relative to each other, so as to push the push plate to move relative to the frame.

[0013] The present invention is further configured such that: first auxiliary connecting rods and second auxiliary connecting rods are respectively connected to both ends of the telescopic device. Two first auxiliary connecting rods which are respectively rotationally connected to two telescopic connecting rods in the telescopic unit are rotationally provided on the frame. Two second auxiliary connecting rods which are respectively rotationally connected to two telescopic connecting rods in the telescopic unit are rotationally provided on the push plate.

[0014] The present invention is further configured such that: the transmission device includes a second screw rod rotationally provided on the frame, and a second driving block is provided on the second screw rod. The second driving block is in threaded connection with the second screw rod. The driving motor drives the second screw rod to rotate, and drives two telescopic connecting rods in the telescopic unit to rotate relative to each other through the second driving block, so that the pushing member slides relative to the frame.

[0015] The present invention is further configured such that: a transmission box is detachably provided on the frame. A first installation cavity and a second installation cavity for respectively installing the first transmission device and the second transmission device are provided in the transmission box. A first end cover and a second end cover for sealing the first installation cavity and the second installation cavity are respectively detachably provided on the transmission box.

[0016] The advantages of the present invention compared with the prior art are as follows: In the present invention, the electric leg stretcher is driven by a driving motor, and it is more labor-saving for the user to exercise, so it is easier to persist. During the use process, the user only needs to place the leg on the device. The user can read a book / watch a video while exercising, which is beneficial to extending the exercise time of the user. The controller and the current sensor can detect the working state of the driving motor, so as to indirectly detect the resistance received by the side push rods, avoid excessive movement distance of the two side push rods during exercise, which may cause muscle and ligament strain to the user, and is beneficial to improving the safety of the auxiliary electric leg stretcher and facilitating the user to use and exercise; in this structure, the controller can control the driving motor to rotate forward and backward in a cycle. The function of setting this reciprocating motion is as follows: when the user performs crotch-opening exercise, first open the user's leg to the preset maximum amplitude, and then through the forward and backward rotation of the motor, the push plate can perform a reciprocating motion, thereby driving the user's leg to swing slightly and performing reciprocating stretching on the leg ligaments and muscles. After long-term use, the user's leg will adapt to the maximum opening amplitude, thereby increasing the crotch-opening amplitude of the user, which is beneficial to improving the exercise effect of the electric leg stretcher; when the user performs waist exercise, first bend the user's waist to the maximum amplitude, and then through the forward and backward rotation of the motor, the push plate can perform a reciprocating motion, thereby driving the user's waist to swing slightly and performing reciprocating stretching on the waist ligaments and muscles. After long-term use, the user's waist will adapt to the maximum bending amplitude, thereby increasing the bending amplitude of the user's waist, which is beneficial to improving the exercise effect of the electric leg stretcher.

[0017] The setting of the adjustment device in the present invention can adjust the set value of the current sensor. When the user uses the electric stretching trainer, the user can control the maximum resistance of the side push rod during use by adjusting the set value of the current sensor, which makes it convenient for different users to use the electric stretching trainer and is convenient for users to use.

[0018] The two side push rods and the first transmission device in the present invention can respectively drive the user's legs to swing horizontally, thereby performing hip-opening training, making it convenient for the user to stretch the legs, and increasing the hip-opening range of the user after long-term use; the longitudinal push rod and the second transmission device can control the longitudinal movement of the user's body parts, thereby assisting the user in bending the waist, and increasing the bending range of the user's waist after long-term use, which is beneficial to improving the flexibility of the user's body.

[0019] The driving motor in the present invention can drive the pushing member to slide relative to the frame through the first screw and the first driving block. The structure preferably adopts trapezoidal thread transmission, which has a strong load capacity and is conducive to increasing the force of the pushing member on the user, and the structure can be self-locking to avoid the pushing member being subjected to force during use, causing the first screw and the driving motor to reverse; the provision of at least two guide rods and guide holes is conducive to the stable movement of the pushing member, and avoids the deflection of the pushing member during use, which affects the normal use of the electric stretching trainer.

[0020] The two telescopic links hinged in an X shape in the present invention have a simple structure and are convenient for the production and assembly of the telescopic unit. The telescopic units in the structure can be used in combination, and the manufacturer can flexibly assemble them according to needs, thereby controlling the lifting efficiency and lifting limit of the telescopic device, which is convenient for users to use; the first auxiliary link and the second auxiliary link can form a link mechanism with the telescopic link, which is simple to process, convenient for production and installation, and convenient for stable installation of the telescopic device, the pushing member and the frame; the second screw is driven to rotate by a driving motor, and the two telescopic links in the telescopic unit are driven to rotate relative to each other by the second driving block on the second screw, thereby realizing the relative movement of the push plate. The second screw is threadedly connected to the second driving block, has a strong load capacity, is conducive to increasing the force of the pushing member on the user, and is convenient for the pushing member to bear a larger mass, which is convenient for users to use.

[0021] The first installation cavity and the second installation cavity arranged on the transmission box in the present invention are convenient for the positioning and installation of the first transmission device and the second transmission device, and are convenient for the rapid assembly and production of the electric stretching trainer, and are beneficial to reducing the parts of the electric stretching trainer, and are convenient for the assembly and production of the electric stretching trainer. The transmission box in this structure is large in size and stable in installation, which is beneficial to reducing the shaking of the pushing member during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a schematic structural view of the present invention in a stored state; Figure 3 is an exploded schematic view of the frame in the present invention; Figure 4 is a schematic structural view of the present invention after removing the outer shell; Figure 5 is a schematic structural view of the present invention after removing the frame; Figure 6 is an exploded schematic view of the present invention after removing the frame; Figure 7 is a partial cross-sectional view of the present invention after removing the frame; Figure 8 is a schematic structural view of the transmission box in the present invention; Figure 9 is a schematic structural view of the side push rod in the present invention; Figure 10 is a schematic structural view of the telescopic unit in the present invention; Figure 11 is a schematic structural view of the first screw rod in the present invention; Figure 12 is a schematic structural view of the longitudinal push member in the present invention.

[0023] The meanings of the reference numerals in the figure: 1 - frame; 11 - outer shell; 12 - main body frame; 13 - guide sleeve; 14 - opening; 15 - transmission box; 16 - first end cover; 17 - second end cover; 18 - controller; 151 - first installation cavity; 152 - second installation cavity; 153 - hinge seat; 2 - drive motor; 21 - first transmission gear set; 22 - first screw rod; 23 - threaded portion; 24 - connecting portion; 3 - side push rod; 31 - first driving block; 32 - guide rod; 33 - push plate; 4 - longitudinal push member; 5 - telescopic device; 51 - telescopic unit; 52 - first auxiliary connecting rod; 53 - second auxiliary connecting rod; 54 - second screw rod; 55 - second driving block; 56 - second transmission gear set; 511 - telescopic connecting rod; 512 - hinge rod. Detailed implementation manners

[0024] The present invention will be further described below with specific embodiments in conjunction with the accompanying drawings: Refer to Figures 1 to 12As shown in the figure, an electric stretching trainer includes a frame 1 and a pushing member. A push plate 33 is provided on the pushing member. A driving motor 2 and a transmission device are provided on the frame 1. The driving motor 2 can drive the pushing member to move towards the side of the frame 1 through the transmission device, and make the push plate 33 on the pushing member move away from or close to the frame 1, thereby driving the movement of the user's body part; A controller 18 for controlling the driving motor 2 is further provided on the frame 1, and a current sensor for detecting the current in the driving motor 2 is provided on the driving motor 2. The controller 18 can judge the working state of the first driving motor 2 through the current sensor, thereby controlling the maximum movement distance of the pushing member according to the working state of the driving motor 2, and avoiding muscle and ligament strains of the user; The driving motor 2 can rotate forward and backward under the action of the controller 18; when reaching the rated load, the driving motor 2 rotates forward and backward, so that the push plate 33 on the pushing member makes a reciprocating movement at the maximum movement distance position.

[0025] In the above structure, the electric stretching trainer is driven by the driving motor 2, and it is more labor-saving for the user to exercise, so it is easier to persevere. During use, the user only needs to place the legs on the device. The user can read a book / watch a video while exercising, which is beneficial to extend the exercise time of the user. In this structure, the controller 18 and the current sensor can detect the working state of the driving motor 2, thereby indirectly detecting the resistance received by the pushing member, avoiding excessive movement distances of the two pushing members during exercise and causing muscle and ligament strains of the user, which is beneficial to improving the safety of the auxiliary electric stretching trainer and facilitating the user to use and exercise; in this structure, the controller 18 can control the driving motor 2 to rotate forward and backward in a cycle. The function of setting this reciprocating movement is as follows: when the user performs hip-opening exercise, first open the user's legs to the preset maximum amplitude, and then through the forward and backward rotation of the motor, the push plate 33 can make a reciprocating movement, thereby driving the user's legs to swing slightly and stretching the leg ligaments and muscles reciprocally. After long-term use, the user's legs will adapt to the maximum opening amplitude, thereby increasing the hip-opening amplitude of the user, which is beneficial to improving the exercise effect of the electric stretching trainer; when the user performs waist exercise, first bend the user's waist to the maximum amplitude and stretch the waist ligaments and muscles reciprocally, and then through the forward and backward rotation of the motor, the push plate 33 can make a reciprocating movement, thereby driving the user's waist to swing slightly. After long-term use, the user's waist will adapt to the maximum bending amplitude, thereby increasing the bending amplitude of the user's waist, which is beneficial to improving the exercise effect of the electric stretching trainer.

[0026] During the use of the electric stretching trainer, the maximum distance of the moving part varies for different users or different training times. If the moving distance of the moving part is directly set, it is likely to cause the user to be unable to effectively stretch the muscles and ligaments, or cause muscle and ligament strains to the user. In the present invention, since the resistance received by the moving part or the drive motor 2 is detected by the current sensor, the maximum distance of the moving part during the use of the electric stretching trainer varies from person to person. When the muscles and ligaments of the user are stretched to the maximum opening amplitude during training, the resistance received by the moving part or the drive motor 2 will increase until the sensor reaches the set value, thereby ensuring that different users can perform effective exercises when using the electric stretching trainer.

[0027] In the above structure, the rated load refers to the maximum value of the voltage or current in the drive motor 2. The size of the rated load is fed back to the controller 18 by the current sensor. During the use of the electric stretching trainer, when the resistance received by the moving part is too large, the working efficiency of the drive motor 2 will decrease or even stop working, resulting in an increase in the current in the drive motor 2 and a rise in the temperature of the drive motor 2. The current in the drive motor 2 can be detected by the current sensor. When the current sensor detects that the current in the drive motor 2 changes to the set value, the controller controls the drive motor 2 to reverse. When a period of time has passed or the detected value of the current sensor changes by a certain value, the controller controls the drive motor 2 to continue to rotate forward, so that the drive motor 2 continuously rotates forward and backward.

[0028] In the present invention, an adjustment device is provided on the controller 18. The set value of the current sensor can be adjusted through the adjustment device, so as to control the maximum resistance received by the moving part during use. The setting of the adjustment device can adjust the set value of the current sensor. When the user uses the electric stretching trainer, the set value of the current sensor can be adjusted to control the maximum resistance received by the moving part during use, which is convenient for different users to use the electric stretching trainer and convenient for the user to use.

[0029] The adjustment device can be a rotary switch, a push-button switch, etc. In this embodiment, the adjustment device is a touch screen provided on the controller 18. The touch screen can display the set value of the sensor, and the touch screen can also assist the user to adjust the set value of the sensor.

[0030] Preferably, the adjustment device includes multiple gears, and different gears correspond to different set values of the current sensor. The user can control the adjustment device to adjust to different gears, so as to control the maximum resistance received by the moving part during use, which is convenient for different users to use the electric stretching trainer and convenient for the user to use.

[0031] In the present invention, the pushing member includes two side push rods 3, the transmission device includes a first transmission device, and the driving motor 2 can drive the two side push rods 3 to move synchronously towards both sides of the frame 1 through the first transmission device, and make the push plates 33 on the two side push rods 3 move away from each other, so as to push the user's legs to expand laterally. The setting of the two side push rods 3 and the first transmission device can drive the legs of the user to swing in the horizontal direction respectively, so as to perform crotch-opening training, which is convenient for the user to stretch the legs. After long-term use, the crotch-opening amplitude of the user can be increased.

[0032] The pushing member further includes a longitudinal push member 4, the transmission device includes a second transmission device, and the driving motor 2 can drive the longitudinal push member 4 to move longitudinally up and down through the second transmission device, so as to drive the body part of the user to move up or down. The setting of the longitudinal push rod and the second transmission device can control the longitudinal movement of the body part of the user, so as to assist the user to bend the waist. After long-term use, the bending amplitude of the user's waist can be increased, which is beneficial to improving the flexibility of the user's body.

[0033] In the present invention, the transmission device can drive the pushing member to move through a screw structure, and the transmission device can also drive the pushing member to move through a scissor telescopic structure. The following are two implementation manners: Embodiment

[0034] In this embodiment, the transmission device includes a first screw rod 22 rotatably arranged on the frame 1, and a first driving block 31 adapted to the first screw rod 22 is arranged on the pushing member. The driving motor 2 drives the first screw rod 22 to rotate, and drives the first driving block 31 to move through the first screw rod 22, so as to drive the pushing member to slide relative to the frame 1. In this structure, the driving motor 2 can drive the pushing member to slide relative to the frame 1 through the first screw rod 22 and the first driving block 31. In this structure, a trapezoidal thread transmission is preferably adopted, which has strong load-bearing capacity, is beneficial to increasing the acting force of the pushing member on the user, and this structure can be self-locked to avoid the first screw rod 22 and the driving motor 2 from reversing due to the force on the pushing member during use.

[0035] Preferably, at least two guide rods 32 detachably arranged on the first driving block 31 are arranged on the pushing member, and guide holes adapted to the guide rods 32 are arranged on the frame 1. The guide rods 32 pass through the guide holes and extend to the side of the frame 1. The push plate 33 is arranged on the guide rods 32 and is located on the side of the guide hole away from the first driving block 31. The setting of at least two guide rods 32 and the guide holes is beneficial to the stable movement of the pushing member, and avoids the deviation of the pushing member during use from affecting the normal use of the electric stretching trainer.

[0036] In this embodiment, two guide rods 32 are arranged on the pusher, and guide sleeves 13 adapted to the two guide rods 32 are arranged on the frame 1. The guide holes are arranged in the guide sleeves 13. The guide rods 32 are slidably connected to the guide sleeves 13, and the guide rods 32 pass through the frame 1 through the guide sleeves 13. The arrangement of the guide sleeves 13 facilitates the stable sliding of the guide rods 32 and the frame 1, and is also convenient for the user to replace the guide sleeves 13 and the guide rods 32 after long-term use, which is beneficial to extending the service life of the electric leg stretcher.

[0037] Preferably, the guide rods 32 are evenly arranged in a circle centered on the first screw rod 22. The guide rods 32 evenly arranged in a circle centered on the first screw rod 22 are beneficial to the uniform stress at the connection position between the first driving block 31 and the first screw rod 22, avoiding damage to the connection position between the first driving block 31 and the first screw rod 22 caused by the skew of the first driving block 31 during use, which is beneficial to extending the service life of the electric leg stretcher. Embodiment

[0038] In this embodiment, the transmission device includes a telescopic device 5. The telescopic device 5 includes a plurality of telescopic units 51. Each telescopic unit 51 includes two telescopic connecting rods 511 hinged in an X shape. The driving motor 2 drives the two telescopic connecting rods 511 in the telescopic unit 51 to rotate relative to each other, thereby pushing the push plate 33 to move relative to the frame 1. The structure of the two telescopic connecting rods 511 hinged in an X shape is simple, which is convenient for the production and assembly of the telescopic unit 51. Moreover, the telescopic units 51 in this structure can be used in combination, and the producer can flexibly assemble them according to needs, thereby controlling the lifting efficiency and lifting limit of the telescopic device 5, which is convenient for the user to use.

[0039] The two ends of the telescopic device 5 are respectively connected with a first auxiliary connecting rod 52 and a second auxiliary connecting rod 53. Two first auxiliary connecting rods 52 respectively rotatably connected to the two telescopic connecting rods 511 in the telescopic unit 51 are rotatably arranged on the frame 1, and two second auxiliary connecting rods 53 respectively rotatably connected to the two telescopic connecting rods 511 in the telescopic unit 51 are rotatably arranged on the push plate 33. The first auxiliary connecting rod 52 and the second auxiliary connecting rod 53 can form a linkage mechanism with the telescopic connecting rods 511. The processing is simple, which is convenient for production and installation, and is also convenient for the stable installation of the telescopic device 5, the pusher and the frame 1.

[0040] The transmission device includes a second screw rod 54 rotatably arranged on the frame 1, and a second driving block 55 is arranged on the second screw rod 54. The second driving block 55 is threadedly connected to the second screw rod 54. The driving motor 2 drives the second screw rod 54 to rotate, and drives two telescopic connecting rods 511 in the telescopic unit 51 to rotate relative to each other through the second driving block 55, so that the pushing member slides relative to the frame 1. In this structure, the driving motor 2 drives the second screw rod 54 to rotate, and drives two telescopic connecting rods 511 in the telescopic unit 51 to rotate relative to each other through the second driving block 55 on the second screw rod 54, thereby realizing the relative movement of the push plate 33. The second screw rod 54 is threadedly connected to the second driving block 55, with strong load-bearing capacity, which is beneficial to increasing the acting force of the pushing member on the user, facilitating the pushing member to carry a larger mass, and being convenient for the user to use.

[0041] The second driving block 55 can be directly connected to the telescopic connecting rod 511 to drive the telescopic device 5 to expand and contract. In the present invention, two telescopic connecting rods 511 in the telescopic unit 51 are rotationally connected through a hinge rod 512. The hinge rod 512 is detachably connected to the second driving block 55. The second screw rod 54 drives the hinge rod 512 to move axially along the second screw rod 54 through the second driving block 55, and drives two telescopic connecting rods 511 to rotate relative to each other. In this structure, the second driving block 55 drives two telescopic connecting rods 511 to rotate relative to each other by driving the displacement of the hinge rod 512. In this structure, the second screw rod 54, the telescopic connecting rod 511, the first auxiliary connecting rod 52 and the frame 1 form a four-bar mechanism, with stable structure, which is convenient for the second driving block 55 to drive the telescopic device 5 to expand and contract.

[0042] Preferably, two groups of second screw rods 54 are rotatably arranged on the frame 1. The driving motor 2 drives the two groups of second screw rods 54 to rotate synchronously. Second driving blocks 55 are arranged on both groups of second screw rods 54, and the two groups of second screw rods 54 are respectively arranged on both sides of the telescopic device 5. Both ends of the hinge rod 512 are respectively connected to the second driving blocks 55 on the two groups of second screw rods 54. The arrangement of the two groups of second screw rods 54 and the second driving blocks 55 is beneficial to the uniform force of the hinge rod 512, facilitating the stable expansion and contraction of the telescopic device 5, avoiding the deflection of the hinge rod 512 caused by the force on the telescopic device 5 during use, and being beneficial to the transmission device to drive the telescopic device 5 to expand and contract.

[0043] In the attached drawings of the specification of the present invention, the side push rod 3 is realized in the manner of Embodiment 1, and the side push rod 3 is realized in the manner of Embodiment 2. The structures in the above Embodiment 1 and Embodiment 2 can be driven by the same driving motor 2. A clutch structure is required between the driving motor 2 and the transmission devices in Embodiment 1 and Embodiment 2, so that the push plate 33 and the support plate 57 can be used independently. In the present invention, it is preferred that the transmission devices in Embodiment 1 and Embodiment 2 respectively correspond to independent driving motors 2.

[0044] In the present invention, the drive motor 2 can be directly connected to the first screw 22 or the second screw 54, or the drive motor 2 can be connected to the first screw 22 or the second screw 54 through a transmission structure. The transmission structure can be a belt drive, a chain drive or a gear drive. In the attached drawings of the specification of the present invention, the drive motor 2 is respectively connected to the first screw 22 or the second screw 54 through a first transmission gear set 21 and a second transmission gear set 56.

[0045] The first screw 22 is provided with a connecting portion 24 and two thread portions 23 with opposite helix directions. Push members 3 are installed on both of the thread portions 23. The first transmission gear set 21 is fixedly arranged on the connecting portion 24. The two thread portions 23 can synchronously drive the two push members 3 to move towards both sides of the frame.

[0046] In the present invention, the frame 1 includes a main frame 12 and a housing 11. The drive motor 2 and the transmission device are both arranged in the housing 11. An opening 14 is provided on the housing 11. The transmission device can pass through the opening 14 and drive the push plate 33 to move, and the transmission device can drive the push plate 33 to cover the upper end of the opening 14 or penetrate into the opening 14. The setting of the housing 11 can reduce the influence of sundries on the movement of the push member, and the push plate 33 can cover the upper end of the opening 14 or penetrate into the opening 14, which is beneficial to prolong the service life of the electric leg stretcher, convenient for the user to use, convenient for the storage and collection of the electric leg stretcher, and can avoid clamping the user or the user's clothes during the movement of the transmission device, which is beneficial to improve the safety of the electric leg stretcher.

[0047] A first auxiliary link 52 is rotatably arranged on the transmission device or the frame 1 and is respectively rotatably connected to two telescopic links 511 in the telescopic unit 51. A second auxiliary link 53 is rotatably arranged on the push plate 33 and is respectively rotatably connected to two telescopic links 511 in the telescopic unit 51. The first auxiliary link 52 and the second auxiliary link 53 can form a link mechanism with the telescopic link 511, which is simple in processing, convenient for production and installation, and convenient for the stable installation of the telescopic device 5, the push plate 33 and the frame 1.

[0048] The frame 1 is detachably provided with a transmission box 15, in which a first installation cavity 151 and a second installation cavity 152 are provided, and the transmission box 15 is respectively detachably provided with a first end cover 16 and a second end cover 17 for sealing the first installation cavity 151 and the second installation cavity 152, and the first transmission gear set 21 and the second transmission gear set 56 are respectively installed in the first installation cavity 151 and the second installation cavity 152. The first installation cavity 151 and the second installation cavity 152 provided on the transmission box 15 are convenient for positioning and installing the first transmission gear set 21 and the second transmission gear set 56, which is convenient for rapid assembly and production of the electric stretching trainer, and is beneficial to reducing the parts of the electric stretching trainer, and is convenient for assembly and production of the electric stretching trainer. In this structure, the transmission box 15 is large in size and stably installed, which is beneficial to reducing the shaking of the pushing member during use.

[0049] In the above structure, since the first transmission gear set 21 and the second transmission gear set 56 are both arranged on the transmission box 15, the size thereof is relatively large and the installation is stable, which is beneficial to reducing the shaking of the push plate 33 during use.

[0050] The transmission box 15 and the longitudinal push member 4 are both provided with an articulated seat 153, one end of the first auxiliary connecting rod 52 is rotatably connected to the articulated seat 153 on the transmission box 15, the other end of the first auxiliary connecting rod 52 is rotatably connected to the telescopic connecting rod 511, one end of the second auxiliary connecting rod 53 is rotatably connected to the articulated seat 153 on the push plate 33, and the other end of the second auxiliary connecting rod 53 is rotatably connected to the telescopic connecting rod 511.

[0051] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric stretching training device, characterized in that: The device comprises a frame (1) and a pusher, wherein a pusher plate (33) is arranged on the pusher, and a drive motor (2) and a transmission device are arranged on the frame (1). The drive motor (2) can drive the pusher to move toward the side of the frame (1) through the transmission device, and make the pusher plate (33) on the pusher move away from or close to the frame (1), thereby driving the body part of the user to move; The frame (1) is also provided with a controller (18) for controlling the drive motor (2), and the drive motor (2) is provided with a current sensor for detecting the current in the drive motor (2). The controller (18) can judge the working state of the first drive motor (2) through the current sensor, thereby controlling the maximum movement distance of the pusher according to the working state of the drive motor (2) and avoiding muscle and ligament strain of the user; The driving motor (2) can rotate forward and reverse under the action of the controller (18); when the rated load is reached, the driving motor (2) rotates forward and reverse, thereby causing the push plate (33) on the push member to reciprocate at the maximum movement distance position.

2. The electric stretching training device according to claim 1, characterized in that: The controller (18) is provided with an adjusting device, through which the setting value of the current sensor can be adjusted, thereby controlling the maximum resistance experienced by the side push rod (3) during use.

3. The electric stretching training device according to claim 1, characterized in that: The pushing member comprises two side push rods (3), and the transmission device comprises a first transmission device. The driving motor (2) can drive the two side push rods (3) to move synchronously to the two sides of the frame (1) through the first transmission device, and make the push plates (33) on the two side push rods (3) move away from each other, thereby pushing the user's legs to spread out to the sides in the horizontal direction.

4. The electric stretching training device according to claim 1, characterized in that: The pushing member comprises a longitudinal pushing member (4), the transmission device comprises a second transmission device, and the driving motor (2) can drive the longitudinal pushing member (4) to move longitudinally up and down through the second transmission device, thereby driving the user's body part to move upward or downward.

5. The electric stretching training device according to claim 1, characterized in that: The transmission device comprises a first screw rod (22) rotatably arranged on the frame (1); a first driving block (31) adapted to the first screw rod (22) is arranged on the pushing member; a driving motor (2) drives the first screw rod (22) to rotate, and drives the first driving block (31) to move through the first screw rod (22), thereby driving the pushing member and the frame (1) to move relative to each other.

6. The electric stretching training device according to claim 5, characterized in that: The pusher is provided with at least two guide rods (32) which are detachably arranged on the first driving block (31); the frame (1) is provided with guide holes adapted to the guide rods (32); the guide rods (32) pass through the guide holes and extend to the side of the frame (1); and the push plate (33) is arranged on the guide rods (32) and is located on a side of the guide hole away from the first driving block (31).

7. The electric stretching training device according to claim 1, characterized in that: The transmission device comprises a telescopic device (5), the telescopic device (5) comprises a plurality of telescopic units (51), the telescopic unit (51) comprises two telescopic connecting rods (511) hinged in an X shape, and the driving motor (2) drives the two telescopic connecting rods (511) in the telescopic unit (51) to rotate relative to each other, thereby pushing the push plate (33) and the frame (1) to move relative to each other.

8. The electric stretching training device according to claim 7, characterized in that: The two ends of the telescopic device (5) are respectively connected to a first auxiliary connecting rod (52) and a second auxiliary connecting rod (53); two first auxiliary connecting rods (52) are rotatably provided on the frame (1) and are respectively rotatably connected to two telescopic connecting rods (511) in the telescopic unit (51); and two second auxiliary connecting rods (53) are rotatably provided on the push plate (33) and are respectively rotatably connected to the two telescopic connecting rods (511) in the telescopic unit (51).

9. An electric stretching training device according to claim 7 or 8, characterized in that: The transmission device comprises a second screw rod (54) rotatably arranged on the frame (1), and a second driving block (55) is arranged on the second screw rod (54), and the second driving block (55) is threadedly connected to the second screw rod (54). The driving motor (2) drives the second screw rod (54) to rotate, and drives two telescopic connecting rods (511) in the telescopic unit (51) to rotate relative to each other through the second driving block (55), so that the pushing member and the frame (1) slide relative to each other.

10. The electric stretching training device according to claim 1, characterized in that: The frame (1) is detachably provided with a transmission box (15), the transmission box (15) being provided with a first installation cavity (151) and a second installation cavity (152) for installing a first transmission device and a second transmission device respectively, and the transmission box (15) is detachably provided with a first end cover (16) and a second end cover (17) for sealing the first installation cavity (151) and the second installation cavity (152) respectively.

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