Tendon stretching body builder

Abstract

The utility model discloses a stretching body builder which comprises a frame body mechanism which at least comprises a movable shell. A seat assembly including at least a leg assembly; the power mechanism is arranged on the movable shell; the transmission shaft at least comprises a transmission shaft capable of swinging in the circumferential direction; the connecting rod assembly at least comprises a crank fixedly arranged on the transmission shaft, a first connecting rod fixed to the crank, a second connecting rod hinged to the first connecting rod and a third connecting rod hinged to the second connecting rod and the movable shell. The movable shell is controlled to move forwards through the movable assembly, a back plate in the seat mechanism is turned over downwards, people can lie on the seat mechanism in a sleeping posture, then the connecting rod assembly is driven by the power mechanism to enable the leg assembly used for supporting the legs of the people to turn over upwards, and therefore the leg bending and stretching effect is achieved.

Description

Technical Field

[0001] The utility model relates to the field of rehabilitation equipment, in particular to a stretching fitness device. Background Art

[0002] As people's living standards continue to improve, they are paying more and more attention to their health, and various health and physiotherapy equipment are increasingly entering ordinary households. Patent No. ZL201220463268.5 discloses an electric massage chair with a stretching function. During operation, the massage chair's movable footplate is mainly activated by the action of an electric push rod to achieve a reciprocating rotation within a certain angle, thereby achieving an upward bending stretching effect on the legs. However, the electric mechanical structure that performs the bending action does not have a safety mechanism. If the power source in the electric mechanical structure fails, there is a risk that the movable footplate will rotate upward beyond the limit, causing the legs to bend and injure, posing a certain threat to people's health. Therefore, it is necessary to develop a stretching fitness device with high safety performance to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to provide a stretching fitness device with simple structure and high safety in order to solve the above problems.

[0004] In order to achieve the above purpose, the technical solution of the utility model is:

[0005] A stretching fitness device, comprising:

[0006] The frame mechanism comprises at least a movable housing;

[0007] a seat assembly comprising at least a leg assembly;

[0008] The power mechanism is arranged on the movable housing and comprises at least one transmission shaft capable of circumferential swinging;

[0009] A connecting rod assembly comprising at least a crank fixedly mounted on the transmission shaft, a first connecting rod fixed to the crank, a second connecting rod hingedly connected to the first connecting rod, and a third connecting rod hingedly connected to the second connecting rod and the movable housing;

[0010] The middle part of the leg assembly is hinged to the second connecting rod; when the transmission shaft swings, the leg assembly is pushed by the second connecting rod connected to the first connecting rod to swing, and swings together with the third connecting rod after the second connecting rod is aligned with the third connecting rod.

[0011] Furthermore, the seat mechanism is arranged on the frame mechanism; the frame mechanism also includes a fixed shell, the top end of the fixed shell is slidably connected to the movable shell, and the movable shell can slide along the front and rear end directions of the fixed shell; the seat mechanism also includes a seat plate and a back plate, the seat plate is fixedly connected to the top end of the movable shell, the back plate is arranged on the rear side of the seat plate, the end of the back plate close to the seat plate is connected to the pin shaft of the movable shell, and the end of the back plate away from the seat plate is connected to the pin shaft of the rear end of the fixed shell through a pull rod; the relative sliding between the fixed shell and the movable shell is used to realize the transition of the seat mechanism from a sitting position to a lying position.

[0012] Furthermore, the leg assembly is arranged at the front end of the seat; the leg assembly includes two symmetrically arranged mounting frames, the two mounting frames are arranged in parallel and the two mounting frames are respectively connected to the connecting rod assembly pins arranged on both sides of the movable shell; a limiting member is fixedly connected to the end face of the mounting frame, and a plurality of rollers are rotatably connected between the two mounting frames, and the plurality of rollers are arranged at equal intervals along the length direction of the mounting frame.

[0013] Furthermore, there are two groups of connecting rod assemblies, which are respectively arranged on both sides of the movable shell. One end of the crank is fixedly connected to the end of the transmission shaft, and the other end of the crank is connected to the pin shaft at one end of the first connecting rod. The first connecting rod is connected to the middle pin shaft of the second connecting rod. The top end of the second connecting rod is connected to the front end pin shaft of the third connecting rod and is provided with an angle limiting structure. The rear end of the third connecting rod is connected to the pin shaft of the movable shell; the middle part of the second connecting rod is connected to the middle pin shaft of the corresponding mounting frame.

[0014] Furthermore, the angle limiting structure includes a limiting ear and a limiting groove. The limiting ear is arranged at the front end of the third connecting rod, and the limiting groove is arranged at the top end of the second connecting rod. The limiting ear is embedded in the limiting groove and is connected to the pin shafts on both sides of the limiting groove; the width of the limiting ear is smaller than the width of the third connecting rod and the end head of the third connecting rod forms a contact surface. The limiting ear is in the shape of a rectangular plate and the end position bottom end angle of the limiting ear is set to a circular arc chamfer structure. The end walls on both sides of the limiting groove are rectangular plates, and the end angles of the top ends of the end walls on both sides of the limiting groove close to the contact surface are set to circular arc chamfers. Angle structure; when the second connecting rod rotates from a vertical state to a horizontal state, the limiting groove and the limiting ear perform relative rotation under the action of the arc chamfer structure; when the second connecting rod is in a horizontal state, the end of the limiting ear abuts against the end wall of the bottom end of the limiting groove, and the top end of the second connecting rod abuts against the abutting surface, so as to limit the second connecting rod from continuing to rotate relative to the third connecting rod; when the second connecting rod continues to rotate upward from a horizontal state, the second connecting rod together with the leg assembly and the third connecting rod rotate upward.

[0015] Furthermore, the power mechanism also includes a power motor and a mounting shell; the mounting shell is fixedly connected to the inner wall of the movable shell, and the two ends of the transmission shaft pass through the mounting shell and the side wall of the movable shell and are fixedly connected to the cranks in the two sets of connecting rod assemblies; the power motor is fixedly connected to the mounting shell, and the output shaft of the power motor is transmission-connected with a driving gear, and the driving gear is meshed with the power gear fixedly sleeved on the transmission shaft; a safety component is provided in the mounting shell, and a positioning component is provided on one side of the mounting shell, and the positioning component is engaged with the safety component.

[0016] Furthermore, the power mechanism also includes an angle sensor for monitoring the rotation and swing angle of the transmission shaft; the power gear is located in the mounting shell, and the mounting shell is connected to an angle sensor with a gear structure, the angle sensor is electrically connected to the power motor, and the gear structure of the angle sensor is meshed with the power gear.

[0017] Furthermore, the safety component includes a sleeve, a baffle member, and a safety gear; the sleeve is located in the mounting shell, the sleeve is sleeved on the transmission shaft and the sleeve is keyed to the transmission shaft, the outer side of the sleeve is connected to the safety gear through a rotating bearing sleeve, the teeth on the outer periphery of the safety gear are engaged with the positioning component, an annular groove is provided on the inner wall of one side of the safety gear, and a positioning protrusion is integrally formed on the inner end wall of the annular groove; the baffle member is located in the annular groove, the baffle member is sleeved on the outer side of the sleeve, the baffle member is engaged with the sleeve and allows the baffle member to rotate with the sleeve and the transmission shaft, and a locking protrusion is provided on the outer side of the baffle member; when the baffle member rotates to a certain angle, the positioning protrusion contacts the locking protrusion and prevents the baffle member from continuing to rotate.

[0018] Furthermore, the safety component also includes a wire rope pulley, which is arranged on the outside of the shaft sleeve and is fixedly connected to the side wall of the safety gear. A pulling rope is wrapped around the outside of the wire rope pulley. The pulling rope is guided by a guide wheel arranged on the side wall of the mounting shell and is connected to one end of the reset spring. The other end of the reset spring is connected to the side wall of the mounting shell.

[0019] Furthermore, the positioning assembly includes an electric cylinder, which is located outside the mounting shell and is fixedly connected to the inner wall of the movable shell. A control panel is fixedly sleeved on the telescopic rod of the electric cylinder. A pawl is fixedly connected to the end of the telescopic rod of the electric cylinder. The pawl extends into the mounting shell and engages with the teeth on the outer periphery of the safety gear when the telescopic rod of the electric cylinder is in an extended state; a buffer spring is sleeved on the outer side of the telescopic rod of the electric cylinder, and both ends of the buffer spring are respectively connected to the pawl and the telescopic rod connecting nut to adjust the distance error of the pawl in the direction of movement.

[0020] Furthermore, a switch plate is fixedly connected to the outer wall of the mounting shell, and the switch plate is located on one side of the telescopic rod of the electric cylinder. Two micro switches for monitoring the extension state and contraction state of the telescopic rod of the electric cylinder are provided on the end face of the switch plate. The two micro switches are arranged longitudinally, and one end of the control board is provided as a bending structure and extends between the two micro switches. When the telescopic rod of the electric cylinder is in the extension and contraction state, the contact pieces on the two micro switches respectively contact the front end and the rear end of the bending structure in the control board.

[0021] Furthermore, a movable component is provided between the fixed shell and the movable shell, and the movable shell is controlled to move by the movable component; the movable component includes a rotating motor, which is fixedly connected in the movable shell, and the rotating motor is connected to one end of the screw rod through a key, and the length direction of the screw rod is consistent with the length direction of the fixed shell, and a nut part is provided on the outside of the screw rod and the screw rod is threadedly connected to the nut part, and the nut part is fixedly connected to the top of the fixed shell.

[0022] Furthermore, the bottom end of the fixed shell is fixedly connected to the bottom frame and supported by the bottom frame; the bottom frame has a rectangular frame structure, and an auxiliary walking assembly is provided on the bottom frame; the auxiliary walking assembly includes walking wheels, supports, columns, and resistance pieces; both sides of the front end of the bottom frame can be rotatably connected to the walking wheels, and the bottoms of both sides of the rear end of the bottom frame are fixedly connected to the supports; both sides of the rear end face of the bottom frame are fixedly connected to connecting ears and connected to the middle pin shaft of the column through the connecting ears, and the bottom end of the column is fixedly connected to a bull's eye universal wheel, and the top end of the column is corresponding to the resistance piece fixedly connected to the side wall of the movable shell; when the movable assembly controls the movable shell to move backward and makes the resistance piece push the top end of the column, the bull's eye universal wheel at the bottom end of the column rotates downward and replaces the support to support the ground.

[0023] Furthermore, armrests are fixedly connected on both sides of the bottom frame, and outer shells are provided on the outer sides of the armrests and the rear side of the back plate. Both the outer shell and the armrests are fiberglass reinforced plastic structures, and the outer shell is fixedly connected to the armrests or the outer periphery of the bottom frame.

[0024] A safety mechanism for limiting the rotation angle of a transmission shaft, which is mounted on a mounting shell and can rotate relative to the mounting shell; the safety mechanism includes a sleeve, a baffle member, and a safety gear; the sleeve is located in the mounting shell, the sleeve is sleeved on the transmission shaft and the sleeve is keyed to the transmission shaft, the outer side of the sleeve is connected to a safety gear through a rotating bearing sleeve, the teeth on the outer periphery of the safety gear are engaged with the positioning assembly, an annular groove is provided on the inner wall of one side of the safety gear, and a positioning protrusion is integrally formed on the inner end wall of the annular groove; the baffle member is located in the annular groove, and the baffle member is sleeved on the outer side of the sleeve, the baffle member is engaged with the sleeve and allows the baffle member to rotate with the sleeve and the transmission shaft, and a locking protrusion is provided on the outer side of the baffle member; when the baffle member rotates to a certain angle, the positioning protrusion contacts the locking protrusion and prevents the baffle member from continuing to rotate.

[0025] Furthermore, the safety mechanism also includes a wire rope pulley, which is arranged on the outside of the shaft sleeve and is fixedly connected to the side wall of the safety gear. A pulling rope is wrapped around the outside of the wire rope pulley. The pulling rope is guided by a guide wheel arranged on the side wall of the mounting shell and is connected to one end of the reset spring. The other end of the reset spring is connected to the side wall of the mounting shell.

[0026] Furthermore, the positioning assembly includes an electric cylinder, which is located outside the mounting shell and is fixedly connected to the inner wall of the movable shell. A control panel is fixedly sleeved on the telescopic rod of the electric cylinder. A pawl is fixedly connected to the end of the telescopic rod of the electric cylinder. The pawl extends into the mounting shell and engages with the teeth on the outer periphery of the safety gear when the telescopic rod of the electric cylinder is in an extended state; a buffer spring is sleeved on the outer side of the telescopic rod of the electric cylinder, and both ends of the buffer spring are respectively connected to the pawl and the telescopic rod connecting nut to adjust the distance error of the pawl in the direction of movement.

[0027] Furthermore, a switch plate is fixedly connected to the outer wall of the mounting shell, and the switch plate is located on one side of the telescopic rod of the electric cylinder. Two micro switches for monitoring the extension state and contraction state of the telescopic rod of the electric cylinder are provided on the end face of the switch plate. The two micro switches are arranged longitudinally, and one end of the control board is provided as a bending structure and extends between the two micro switches. When the telescopic rod of the electric cylinder is in the extension and contraction state, the contact pieces on the two micro switches respectively contact the front end and the rear end of the bending structure in the control board.

[0028] Compared with the prior art, the advantages and positive effects of this utility model are:

[0029] When the present invention is in use, the movable shell is first controlled to move forward by the movable assembly, so that the back plate in the seat mechanism is flipped downward, and people can lie on the seat mechanism in a sleeping position. Then, the power mechanism drives the connecting rod assembly to flip the leg assembly used to support people's legs upward, thereby achieving the effect of bending and stretching the legs. At the same time, the present invention realizes the flipping angle control effect of the connecting rod assembly by monitoring the number of rotating teeth of the power gear through the design of arranging an angle sensor with a gear structure in the power mechanism, so as to avoid the power mechanism rotating at an excessively large angle, which causes the flipping angle of the connecting rod assembly and the leg assembly to exceed the bending extreme of the human body. The limiting situation occurs, thereby improving the safety of the stretching operation; and, the utility model arranges a safety component and a positioning component in the power mechanism, so that before the stretching operation is performed, the maximum rotation angle of the power gear in the stretching operation can be mechanically limited by the safety component and the positioning component, thereby realizing the limitation of the maximum flipping angle of the connecting rod assembly and the leg assembly, avoiding the situation that the leg assembly flips upward at an excessively large angle when the power motor fails, causing the human leg to bend and be injured, reducing the safety risks during people's stretching operations, effectively improving the safety of the stretching equipment, and further improving the use effect of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0031] Figure 1 It is a structural diagram of the utility model;

[0032] Figure 2 The internal structure of the utility model Figure 1 ;

[0033] Figure 3 for Figure 2 A magnified view of the local structure;

[0034] Figure 4 The internal structure of the utility model Figure 2 ;

[0035] Figure 5 for Figure 4 A magnified view of the local structure;

[0036] Figure 6 This is a structural diagram of the connection between the bottom frame and the armrest;

[0037] Figure 7An overall connection diagram of multiple components;

[0038] Figure 8 It is the connection structure diagram of the active components;

[0039] Figure 9 It is a structural diagram of the connection between the power mechanism and the movable housing;

[0040] Figure 10 It is a structural diagram of the power mechanism;

[0041] Figure 11 It is the connection structure diagram of the positioning component;

[0042] Figure 12 It is a structural diagram of the safety component;

[0043] Figure 13 This is the connection structure diagram of the safety gear;

[0044] Figure 14 This is a structural diagram of the initial connection between the safety gear and the baffle;

[0045] Figure 15 This is a diagram of the connection structure between the safety gear and the baffle in the tensioned state. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts, any modifications, equivalent replacements, improvements, etc., shall be included in the scope of protection of the present invention.

[0047] like Figures 1 to 15 As shown, this embodiment discloses a stretching fitness device, comprising a frame mechanism, with a seat mechanism 1 disposed above the frame mechanism;

[0048] The frame mechanism includes a bottom frame 9, a fixed shell 10, and a movable shell 11. The bottom frame 9 is fixedly connected to the fixed shell 10 arranged at the upper end of the bottom frame 9. A movable shell 11 is arranged on the top of the fixed shell 10. The fixed shell 10 is slidably connected to the movable shell 11 and the movable shell 11 can slide along the length direction of the fixed shell 10; a movable component 5 is arranged between the fixed shell 10 and the movable shell 11 and the movable shell 11 is controlled to move by the movable component 5; a power mechanism 6 is arranged in the movable shell 11, and the two ends of the power mechanism 6 extend out of the side walls of the movable shell 11 on both sides and are movably connected to the seat mechanism 1 through the connecting rod assembly 3.

[0049] Armrests 12 are fixedly connected to both sides of the bottom frame 9, and a shell 13 is provided on the outside of the armrest 12 and the rear side of the seat mechanism 1. The shell 13 and the armrest 12 are both glass fiber reinforced plastic structures, and the shell 13 is fixedly connected to the armrest 12 or the outer periphery of the bottom frame 9.

[0050] The armrests and the shell are both arranged on the outside of the frame mechanism, which can make people sit on the stretching fitness device more comfortable, and the shell protects the frame mechanism, and all movements of the frame mechanism are performed in the shell.

[0051] The movable component 5 includes a rotating motor 502 and a sliding rail 501. The sliding rail 501 is arranged between the fixed shell 10 and the movable shell 11 and realizes a sliding connection between the two. The rotating motor 502 is fixedly connected to the movable shell 11. The rotating motor 502 is connected to one end of the screw rod 504 through a key. The length direction of the screw rod 504 is consistent with the length direction of the fixed shell 10. A nut 503 is sleeved on the outside of the screw rod 504 and the screw rod 504 is threadedly connected to the nut 503. The nut 503 is fixedly connected to the top of the fixed shell 10.

[0052] The chair mechanism 1 includes a seat 101, a back panel 102, and a leg assembly 2. The seat 101 is fixedly connected to the top of the movable shell 11, the leg assembly 2 is arranged at the front end of the seat 101 and the leg assembly 2 is connected to the movable shell 11 through a connecting rod assembly 3; the back panel 102 is arranged at the rear end of the seat 101, and the two sides of the end of the back panel 102 close to the seat 101 are connected to the pins on both sides of the movable shell 11, and the two sides of the end of the back panel 102 away from the seat 101 are provided with pull rods 103, the top of the pull rod 103 is connected to the back panel 102 with a pin, and the bottom end of the pull rod 103 is connected to the pin at the rear end of the fixed shell 10.

[0053] The leg assembly 2 includes two symmetrically arranged mounting frames 201, which are arranged in parallel and are respectively connected to the connecting rod assemblies 3 arranged on both sides of the movable shell 11 with pins; a limiting member 202 is fixedly connected to the end face of the mounting frame 201, and a plurality of rollers 203 are rotatably connected between the two mounting frames 201, and the plurality of rollers 203 are arranged at equal intervals along the length direction of the mounting frame 201.

[0054] In the normal state, the movable shell is completely located at the top of the fixed shell, and the entire device is a sofa structure, and people can sit on the seat to rest; when stretching operation is needed, the rotating motor in the movable mechanism is operated, and under the action of the screw nut, the movable shell moves forward, and the back plate is flipped downward by the pull rod, so that people can lie on the seat and back plate, and finally the power mechanism drives the connecting rod assembly to flip the leg assembly upward, thereby achieving the effect of bending people's legs upward for stretching; at the same time, by arranging multiple rollers on the leg assembly, when the leg assembly flips, a certain friction will be generated between the rollers and the leg muscles and the rollers will rotate, which can achieve the rolling massage effect of the rollers on the leg muscles.

[0055] The connecting rod assembly 3 has two groups and is respectively arranged on both sides of the movable shell 11. The connecting rod assembly 3 includes a crank 301, a first connecting rod 302, a second connecting rod 303, and a third connecting rod 304. One end of the crank 301 is fixedly connected to the power mechanism 6, and the other end of the crank 301 is pin-connected to one end of the first connecting rod 302. The first connecting rod 302 is pin-connected to the middle of the second connecting rod 303. The top end of the second connecting rod 303 is pin-connected to the front end of the third connecting rod 304 and is provided with an angle limiting structure. The rear end of the third connecting rod 304 is pin-connected to the movable shell 11; the middle part of the second connecting rod 303 is pin-connected to the middle part of the corresponding mounting frame 201.

[0056] The angle limiting structure includes a limiting ear 3041 and a limiting groove 3031. The limiting ear 3041 is arranged at the front end of the third connecting rod 304, and the limiting groove 3031 is arranged at the top end of the second connecting rod 303. The limiting ear 3041 is embedded in the limiting groove 3031 and is connected to the pins on both sides of the limiting groove 3031; the width of the limiting ear 3041 is smaller than the width of the third connecting rod 304 and the end of the third connecting rod 304 forms a contact surface 3042, the limiting ear 3041 is in the shape of a rectangular plate and the bottom end angle of the end position of the limiting ear 3041 is set to a circular arc chamfer structure, the end walls on both sides of the limiting groove 3031 are both in the shape of rectangular plates, and the top ends of the end walls on both sides of the limiting groove 3031 are close to the contact surface 3042 The end angle is set as a circular arc chamfer structure; when the second link 303 rotates from a vertical state to a horizontal state, the limiting groove 3031 and the limiting ear 3041 perform relative rotation under the action of the circular arc chamfer structure; when the second link 303 is in a horizontal state, the end of the limiting ear 3041 abuts against the bottom end wall of the limiting groove 3031, and the top end of the second link 303 abuts against the abutment surface 3042, so as to limit the second link 303 from continuing to rotate relative to the third link 304; when the second link 303 continues to rotate upward from the horizontal state, the second link 303 rotates upward together with the leg assembly 2 and the third link 304.

[0057] The power mechanism 6 includes a power motor 603, a transmission shaft 602, and a mounting housing 601; the mounting housing 601 is fixedly connected to the inner wall of the movable housing 11, and the two ends of the transmission shaft 602 pass through the mounting housing 601 and the side wall of the movable housing 11 and are fixedly connected to the cranks 301 in the two sets of connecting rod assemblies 3, and the transmission shaft 602 is rotatably connected to the mounting housing 601 and the side wall of the movable housing 11; the power motor 603 is fixedly connected to the mounting housing 601, and the output shaft of the power motor 603 is connected to the driving gear 60 4. The driving gear 604 is meshed with the power gear 605 fixedly mounted on the transmission shaft 602. The power gear 605 is located in the mounting housing 601. The mounting housing 601 is connected to an angle sensor 606 having a gear structure. The angle sensor 606 is electrically connected to the power motor 603 via the controller. The gear structure of the angle sensor 606 is meshed with the power gear 605. A safety component 7 is provided in the mounting housing 601. A positioning component 8 is provided on one side of the mounting housing 601. The positioning component 8 is engaged with the safety component 7.

[0058] When the power mechanism is working, the power motor drives the driving gear to rotate, and the power gear drives the transmission shaft to rotate. The two ends of the transmission shaft respectively drive the cranks in the two groups of connecting rod assemblies to rotate, and the cranks drive the first connecting rod, the second connecting rod, and the third connecting rod to produce a linkage effect, and finally the mounting frame connected to the second connecting rod and the entire leg assembly are flipped; when flipping, people's calves are located on the leg assembly, and during the flipping of the second connecting rod, the leg assembly can rotate relative to the second connecting rod, so that the flipping of the second connecting rod will not cause excessive bending of the calf position, and finally achieve the effect of stretching the thigh and waist position, avoiding the situation where the calf bends upward at an excessively large angle and sprains the knee during the flipping process, further improving the use effect of the present utility model.

[0059] This device is also provided with a controller, which is electrically connected to the power motor and the angle sensor. When the power motor drives the connecting rod assembly and the leg assembly to flip, the angle sensor monitors according to the number of rotating teeth of the power gear; when the number of rotating teeth of the power gear reaches a predetermined number, it is determined that the flipping angle of the connecting rod assembly has reached a maximum value, and the angle sensor transmits the signal to the controller. The controller instructs the power motor to rotate in the opposite direction, and the angle sensor continues to monitor the number of rotating teeth; this reciprocating operation is finally realized, and the power mechanism drives the connecting rod assembly to flip back and forth.

[0060] The safety component 7 includes a sleeve 703, a baffle member 708, a safety gear 701, and a wire rope pulley 702; the sleeve 703 is located in the mounting shell 601, the sleeve 703 is sleeved on the transmission shaft 602 and the sleeve 703 is keyed to the transmission shaft 602, the outer side of the sleeve 703 is sleeved with a safety gear 701 through a rotary bearing 709, the teeth on the outer periphery of the safety gear 701 are engaged with the positioning component 8, and an annular groove 7011 is provided on the inner wall of one side of the safety gear 701, and a positioning protrusion 7012 is integrally formed on the inner end wall of the annular groove 7011; the baffle member 708 is located in the annular groove 7011, the baffle member 708 is sleeved on the outer side of the sleeve 703, the baffle member 708 is engaged with the sleeve 703 and allows the baffle member 708 to move along with the sleeve 703 and the transmission shaft 602 When the safety gear 701 is in a state of rotation and the lever 710 is in a state of rotation, the lever 710 is in a state of rotation and the spring 708 is in a state of rotation and the like, and the pulley 710 is in a state of rotation and the like, and the pulley 710 is in a state of rotation and the like, and the pulley 710 is in a state of rotation and the like, and the pulley 710 is in a state of rotation and the like, and the pulley 710 is in a state of rotation and the like, and the pulley 710 is in a state of rotation and the like, and the pulley 710 is in a state of rotation and the like, and the pulley 710 is in a state of rotation and the like,

[0061] In the initial state, the power motor does not work. Under the preload of the reset spring, the positioning protrusion of the safety gear will abut against the positioning protrusion. Figure 13 As shown; when the first stretching action is performed, the power motor drives the power gear, transmission shaft, bushing, and baffle to rotate. At the same time, the positioning protrusion on the baffle will push the positioning protrusion and the safety gear and wire rope pulley to rotate together, and the reset spring is continuously stretched under the action of the pulling rope; when the transmission shaft drives the connecting rod assembly to rotate to the maximum bending stretching angle acceptable to people, the power gear, baffle and safety gear also reach the maximum rotation angle. At this time, the teeth of the safety gear are engaged by the positioning assembly to keep the safety gear stationary; then, the power motor rotates in the opposite direction to restore the transmission shaft, bushing, baffle, connecting rod assembly and leg assembly to their original positions. During this process, the safety gear remains stationary, thereby completing the first stretching operation. At this time, the state between the baffle and the safety gear is as shown Figure 14As shown; in the subsequent reciprocating working process of the power mechanism, the baffle member and the shaft sleeve also perform reciprocating rotation, and the locking protrusion of the baffle member performs reciprocating rotation in the annular groove of the safety gear. The whole process realizes the forward and reverse monitoring of the power gear through the angle sensor; when the angle sensor fails, the power gear will not stop automatically during the rotation. At this time, when the limit angle of people's stretching is reached, the locking protrusion on the baffle member is blocked by the positioning protrusion on the safety gear, and the power gear and the transmission shaft cannot rotate at a larger angle, which avoids damage to people's bodies when the angle sensor fails, and further improves the safety of the stretching operation.

[0062] After the reinforcement operation is completed, the positioning component will no longer engage the safety gear. Under the action of the reset spring and the pulling rope, it will drive the wire rope wheel and the safety gear to rotate in the opposite direction and return to their original position, so that the positioning protrusion and the locking protrusion remain in contact, making it convenient to start the protection operation again when the reinforcement operation is performed next time according to the reinforcement tolerance of different people.

[0063] The positioning assembly 8 includes an electric cylinder 801, which is located outside the mounting housing 601 and is fixedly connected to the inner wall of the movable housing 11. A control panel 802 is fixedly sleeved on the telescopic rod of the electric cylinder 801, and a pawl 803 is fixedly connected to the end of the telescopic rod of the electric cylinder 801. The pawl 803 extends into the mounting housing 601 and engages with the teeth on the outer periphery of the safety gear 701 when the telescopic rod of the electric cylinder 801 is in an extended state; a buffer spring 804 is sleeved on the outer side of the telescopic rod of the electric cylinder 801, and the two ends of the buffer spring 804 are respectively connected to the pawl 803 and the telescopic rod connecting nut, and the telescopic rod connecting nut is fixedly connected to the electric cylinder 801 and the telescopic rod connecting nut The sliding sleeve is arranged on the outside of the telescopic rod; the buffer spring is used to adjust the distance error of the pawl in the direction of movement; a switch plate 805 is fixedly connected to the outer wall of the mounting shell 601, and the switch plate 805 is located on one side of the telescopic rod of the electric cylinder 801. Two micro switches 806 for monitoring the extension state and contraction state of the telescopic rod of the electric cylinder 801 are provided on the end face of the switch plate 805. The two micro switches 806 are arranged longitudinally, and one end of the control board 802 is set as a bending structure and extends between the two micro switches 806. When the telescopic rod of the electric cylinder 801 is in the extension and contraction state, the contact pieces on the two micro switches 806 respectively contact the front end and the rear end of the bending structure in the control board 802.

[0064] The electric cylinder and two micro switches are all connected to the controller, and the micro switch can transmit the extension and retraction status signal of the electric cylinder to the controller; before the power mechanism performs the first stretching operation, the controller energizes the electric cylinder, and the electric cylinder retracts after energization, and the buffer spring is compressed. When the power mechanism and the connecting rod assembly reach the maximum flip angle, the controller cuts off the power to the electric cylinder, and under the elastic action of the buffer spring, the pawl is ordered to extend toward the safety gear until the pawl engages with the teeth on the outer periphery of the safety gear; in the subsequent stretching process, the electric cylinder no longer works and maintains the positioning of the safety gear; after the stretching operation is completely completed, the controller energizes the electric cylinder, and the electric cylinder retracts and stops limiting the safety gear. The safety gear can return to its original position under the action of the reset spring; this design ensures that during the stretching operation, even if the controller is powered off, it will not affect the engaging structure between the electric cylinder and the safety gear, so that the safety component remains in a protective state when the power is cut off, and the bending of the stretching angle will not be too large, thereby ensuring the safety of the entire device.

[0065] The bottom frame 9 is a rectangular frame structure, and an auxiliary walking component 4 is provided on the bottom frame 9; the auxiliary walking component 4 includes a walking wheel 401, a support 402, a column 404, and a resistance member 407; the front end of the bottom frame 9 can be rotatably connected to the walking wheel 401 on both sides, and the bottom of the two sides of the rear end of the bottom frame 9 are fixedly connected to the support 402; the rear end surface of the bottom frame 9 is fixedly connected to the connecting ear 403 on both sides, and is connected to the middle of the column 404 through the connecting ear 403. The column 404 is connected by a pin shaft, and the bottom end is fixedly connected to a bull's eye universal wheel 406, and the top end of the column 404 is provided with a wear-resistant wheel 405, and the wear-resistant wheel 405 is provided corresponding to the resistance piece 407 fixedly connected to the side wall of the movable shell 11; when the movable component 5 controls the movable shell 11 to move backward and makes the resistance piece 407 push the wear-resistant wheel 405 at the top end of the column 404, the bull's eye universal wheel 406 at the bottom end of the column 404 rotates downward and replaces the support 402 to support the ground.

[0066] When the stretching fitness device is in use, it is supported on the ground by the running wheels at the front end of the bottom frame and the supports at the rear end of the bottom frame, which can form a stable support structure, and people can perform stretching operations; when the stretching fitness device needs to be moved, the rotating motor in the movable mechanism is operated, and under the action of the screw nut, the movable shell moves backward, and the resistance piece on the outside of the movable shell pushes the wear-resistant wheel at the top end of the column to flip backward, so that the bull's eye universal wheel at the bottom end of the column is supported on the ground. At this time, the support is in a suspended state, and the stretching fitness device is supported by the running wheels at the front end of the bottom frame and the bull's eye universal wheel at the rear end of the bottom frame, which is convenient for people to push and move, making the stretching fitness device more convenient to move.

[0067] like Figures 10 to 15 As shown, this embodiment also discloses a safety mechanism for limiting the rotation angle of the transmission shaft, which is installed on the mounting housing and can rotate relative to the mounting housing; the safety mechanism includes a sleeve 703, a baffle member 708, a safety gear 701, and a wire rope pulley 702; the sleeve 703 is located in the mounting housing 601, the sleeve 703 is sleeved on the transmission shaft 602 and the sleeve 703 is keyed to the transmission shaft 602, the outer side of the sleeve 703 is sleeved with a safety gear 701 through a rotating bearing 709, the teeth on the outer periphery of the safety gear 701 are engaged with the positioning assembly 8, an annular groove 701 is provided on the inner wall of one side of the safety gear 701, and a positioning protrusion 7012 is integrally formed on the inner end wall of the annular groove 7011; the baffle member 708 is located in the annular groove 7011, the baffle member 708 is sleeved on the outer side of the sleeve 703, the baffle member 708 is engaged with the sleeve 703 When the lever 710 is in the unlocked position, the spring 708 engages with the stopper 709 to lock the lever 711. When the lever 710 is unlocked, the stopper 709 engages the stopper 709 to lock the lever 711. When the lever 710 is unlocked, the stopper 709 engages the stopper 709 to lock the lever 711.

[0068] The positioning assembly 8 includes an electric cylinder 801, which is located outside the mounting housing 601 and is fixedly connected to the inner wall of the movable housing 11. A control panel 802 is fixedly sleeved on the telescopic rod of the electric cylinder 801, and a pawl 803 is fixedly connected to the end of the telescopic rod of the electric cylinder 801. The pawl 803 extends into the mounting housing 601 and engages with the teeth on the outer periphery of the safety gear 701 when the telescopic rod of the electric cylinder 801 is in an extended state; a buffer spring 804 is sleeved on the outer side of the telescopic rod of the electric cylinder 801, and the two ends of the buffer spring 804 are respectively connected to the pawl 803 and the telescopic rod connecting nut, and the telescopic rod connecting nut is fixedly connected to the electric cylinder 801 and the telescopic rod connecting nut The sliding sleeve is arranged on the outside of the telescopic rod; the buffer spring is used to adjust the distance error of the pawl in the direction of movement; a switch plate 805 is fixedly connected to the outer wall of the mounting shell 601, and the switch plate 805 is located on one side of the telescopic rod of the electric cylinder 801. Two micro switches 806 for monitoring the extension state and contraction state of the telescopic rod of the electric cylinder 801 are provided on the end face of the switch plate 805. The two micro switches 806 are arranged longitudinally, and one end of the control board 802 is set as a bending structure and extends between the two micro switches 806. When the telescopic rod of the electric cylinder 801 is in the extension and contraction state, the contact pieces on the two micro switches 806 respectively contact the front end and the rear end of the bending structure in the control board 802.

[0069] When the present invention is in use, the movable shell is first controlled to move forward by the movable assembly, so that the back plate in the seat mechanism is flipped downward, and people can lie on the seat mechanism in a sleeping position. Then, the power mechanism drives the connecting rod assembly to flip the leg assembly used to support people's legs upward, thereby achieving the effect of bending and stretching the legs. At the same time, the present invention realizes the flipping angle control effect of the connecting rod assembly by monitoring the number of rotating teeth of the power gear through the design of arranging an angle sensor with a gear structure in the power mechanism, so as to avoid the power mechanism rotating at an excessively large angle, which causes the flipping angle of the connecting rod assembly and the leg assembly to exceed the bending extreme of the human body. The limiting situation occurs, thereby improving the safety of the stretching operation; and, the utility model arranges a safety component and a positioning component in the power mechanism, so that before the stretching operation is performed, the maximum rotation angle of the power gear in the stretching operation can be mechanically limited by the safety component and the positioning component, thereby realizing the limitation of the maximum flipping angle of the connecting rod assembly and the leg assembly, avoiding the situation that the leg assembly flips upward at an excessively large angle when the power motor fails, causing the human leg to bend and be injured, reducing the safety risks during people's stretching operations, effectively improving the safety of the stretching equipment, and further improving the use effect of the utility model.

Claims

1. A stretching fitness device, characterized in that: include: The frame mechanism comprises at least a movable housing; a seat mechanism comprising at least a leg assembly; A power mechanism is arranged on the movable housing; It includes at least one transmission shaft that can swing in the circumferential direction; A connecting rod assembly comprising at least a crank fixedly mounted on the transmission shaft, a first connecting rod fixed to the crank, a second connecting rod hingedly connected to the first connecting rod, and a third connecting rod hingedly connected to the second connecting rod and the movable housing; The middle part of the leg assembly is hinged to the second connecting rod; when the transmission shaft swings, the leg assembly is pushed by the second connecting rod connected to the first connecting rod to swing, and after the second connecting rod is aligned with the third connecting rod, it swings together with the third connecting rod; The power mechanism also includes a power motor and a mounting housing; the mounting housing is fixedly connected to the inner wall of the movable housing, and the two ends of the transmission shaft pass through the mounting housing and the side walls of the movable housing and are fixedly connected to the cranks in the two sets of connecting rod assemblies; the power motor is fixedly connected to the mounting housing, and the output shaft of the power motor is connected to a driving gear, which is meshed with the power gear fixedly sleeved on the transmission shaft; a safety component is provided in the mounting housing, and a positioning component is provided on one side of the mounting housing, and the positioning component is engaged with the safety component; The power mechanism also includes an angle sensor for monitoring the rotation and swing angle of the transmission shaft; the power gear is located in the mounting shell, and the mounting shell is connected to an angle sensor with a gear structure. The angle sensor is electrically connected to the power motor, and the gear structure of the angle sensor is meshed with the power gear.

2. The stretching fitness device according to claim 1, characterized in that: The seat mechanism is arranged on the frame mechanism; the frame mechanism also includes a fixed shell, the top end of the fixed shell is slidably connected to the movable shell, and the movable shell can slide along the front and rear end directions of the fixed shell; the seat mechanism also includes a seat plate and a back plate, the seat plate is fixedly connected to the top end of the movable shell, the back plate is arranged on the rear side of the seat plate, the end of the back plate close to the seat plate is connected to the pin shaft of the movable shell, and the end of the back plate away from the seat plate is connected to the pin shaft of the rear end of the fixed shell through a pull rod; the relative sliding between the fixed shell and the movable shell is used to realize the transition of the seat mechanism from a sitting position to a lying position.

3. The stretching fitness device according to claim 1, characterized in that: The leg assembly is arranged at the front end of the seat; the leg assembly includes two symmetrically arranged mounting frames, the two mounting frames are arranged in parallel and the two mounting frames are respectively connected to the pin shafts of the connecting rod assembly arranged on both sides of the movable shell; a limiting member is fixedly connected to the end face of the mounting frame, and a plurality of rollers are rotatably connected between the two mounting frames, and the plurality of rollers are arranged at equal intervals along the length direction of the mounting frame.

4. The stretching fitness device according to claim 3, characterized in that: There are two groups of connecting rod assemblies, which are respectively arranged on both sides of the movable housing. One end of the crank is fixedly connected to the end of the transmission shaft, and the other end of the crank is connected to a pin shaft at one end of the first connecting rod. The first connecting rod is connected to the middle pin shaft of the second connecting rod. The top end of the second connecting rod is connected to the front end pin shaft of the third connecting rod and is provided with an angle limiting structure. The rear end of the third connecting rod is connected to the pin shaft of the movable housing; the middle part of the second connecting rod is connected to the middle pin shaft of the corresponding mounting frame.

5. The stretching fitness device according to claim 4, characterized in that: The angle limiting structure includes a limiting ear and a limiting groove. The limiting ear is arranged at the front end of the third connecting rod, and the limiting groove is arranged at the top end of the second connecting rod. The limiting ear is embedded in the limiting groove and is connected to the pin shafts on both sides of the limiting groove; the width of the limiting ear is smaller than the width of the third connecting rod and the end head of the third connecting rod forms a contact surface. The limiting ear is in the shape of a rectangular plate and the end position bottom end angle of the limiting ear is set as a circular arc chamfer structure. The end walls on both sides of the limiting groove are both rectangular plates, and the end angles of the top ends of the end walls on both sides of the limiting groove close to the contact surface are set as circular arc chamfer structures ; When the second connecting rod rotates from a vertical state to a horizontal state, the limit groove and the limit ear perform relative rotation under the action of the arc chamfer structure; when the second connecting rod is in a horizontal state, the end of the limit ear abuts against the bottom end wall of the limit groove, and the top end of the second connecting rod abuts against the abutment surface, so as to limit the second connecting rod from continuing to rotate relative to the third connecting rod; when the second connecting rod continues to rotate upward from a horizontal state, the second connecting rod together with the leg assembly and the third connecting rod rotate upward.

6. The stretching fitness device according to claim 2, characterized in that: The safety component includes a sleeve, a baffle member, and a safety gear; the sleeve is located in the mounting shell, the sleeve is sleeved on the transmission shaft and the sleeve is keyed to the transmission shaft, the outer side of the sleeve is connected to the safety gear through a rotating bearing sleeve, the teeth on the outer periphery of the safety gear are engaged with the positioning component, an annular groove is provided on the inner wall of one side of the safety gear, and a positioning protrusion is integrally formed on the inner end wall of the annular groove; the baffle member is located in the annular groove, the baffle member is sleeved on the outer side of the sleeve, the baffle member is engaged with the sleeve and allows the baffle member to rotate with the sleeve and the transmission shaft, and a locking protrusion is provided on the outer side of the baffle member; when the baffle member rotates to a certain angle, the positioning protrusion contacts the locking protrusion and prevents the baffle member from continuing to rotate.

7. The stretching fitness device according to claim 6, characterized in that: The safety component also includes a wire rope pulley, which is sleeved on the outside of the shaft sleeve and fixedly connected to the side wall of the safety gear. A pulling rope is wrapped around the outside of the wire rope pulley. The pulling rope is guided by a guide wheel arranged on the side wall of the mounting shell and is connected to one end of a reset spring. The other end of the reset spring is connected to the side wall of the mounting shell.

8. The stretching fitness device according to claim 6, characterized in that: The positioning assembly includes an electric cylinder, which is located outside the mounting shell and fixedly connected to the inner wall of the movable shell. A control panel is fixedly sleeved on the telescopic rod of the electric cylinder. A pawl is fixedly connected to the end of the telescopic rod of the electric cylinder. The pawl extends into the mounting shell and engages with the teeth on the outer periphery of the safety gear when the telescopic rod of the electric cylinder is in an extended state. A buffer spring is sleeved on the outer side of the telescopic rod of the electric cylinder. The two ends of the buffer spring are respectively connected to the pawl and the telescopic rod connecting nut to adjust the distance error of the pawl in the direction of movement.

9. The stretching fitness device according to claim 8, characterized in that: A switch plate is fixedly connected to the outer wall of the mounting housing, and the switch plate is located on one side of the telescopic rod of the electric cylinder. Two micro switches for monitoring the extension state and the retraction state of the telescopic rod of the electric cylinder are provided on the end surface of the switch plate, respectively. The two micro switches are arranged longitudinally, and one end of the control plate is provided with a bent structure and extends between the two micro switches. When the telescopic rod of the electric cylinder is in the extension state and the retraction state, the contact members on the two micro switches respectively contact the front end and the rear end of the bent structure in the control plate; A movable assembly is provided between the fixed housing and the movable housing, and the movable housing is controlled to move by the movable assembly; the movable assembly includes a rotary motor, which is fixedly connected to the movable housing, and the rotary motor is connected to one end of a screw rod through a key, the length direction of the screw rod is consistent with the length direction of the fixed housing, a nut is sleeved on the outside of the screw rod, and the screw rod and the nut are threadedly connected, and the nut is fixedly connected to the top end of the fixed housing; The bottom end of the fixed shell is fixedly connected to the bottom frame and supported by the bottom frame; the bottom frame is a rectangular frame structure; the bottom frame is provided with an auxiliary walking assembly; the auxiliary walking assembly includes walking wheels, supports, columns, and interference pieces; the front end sides of the bottom frame can be rotatably connected to the walking wheels, and the bottom ends of the two sides of the rear end of the bottom frame are fixedly connected to the supports; both sides of the rear end face of the bottom frame are fixedly connected to connecting ears and connected to the middle pin shaft of the column through the connecting ears; the bottom end of the column is fixedly connected to the bull's eye universal wheel, and the top end of the column is correspondingly provided with an interference piece fixedly connected to the side wall of the movable shell; when the movable assembly controls the movable shell to move backward and causes the interference piece to push the top end of the column Both sides of the bottom frame are fixedly connected with armrests, and outer shells are provided on the outside of the armrests and the rear side of the back plate. The shells and armrests are both glass fiber reinforced plastic structures, and the shells are fixedly connected to the armrests or the periphery of the bottom frame.

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