CN203329290U

CN203329290U - Electric leg stretcher

Info

Publication number: CN203329290U
Application number: CN201320323853XU
Authority: CN
Inventors: 周欢东
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-06-04
Filing date: 2013-06-04
Publication date: 2013-12-11
Anticipated expiration: 2023-06-04

Abstract

The utility model discloses an electric leg stretcher. The electric leg stretcher comprises a leg stretching mechanism, an electric device, a foot fixing mechanism, a fixing waist band, a plurality of supporting legs, a plurality of leg connecting sleeves, a backrest and a plurality of backrest connecting plates. The foot fixing mechanism, the electric device and the fixing waist band are installed on the leg stretching mechanism. The leg stretching mechanism and the backrest are connected through the backrest connecting plates. The leg stretching mechanism and the backrest connecting plates are fixedly installed. The backrest and the backrest connecting plates can be rotationally installed. According to the electric leg stretcher, the waist of a person is fixed on the leg stretcher with the backrest by the fixing waist band, and the feet are fixed by a foot fixing device so that the person can be prevented from sliding forwards; the electric device drives a gear assembly to control a drive mechanism to stretch and contract so that the foot fixing mechanism can move front and back; a limiting switch is utilized to protect the leg stretcher, so that damage to the leg stretcher caused by excessive stretching or contracting is prevented, and the leg stretcher is comfortable and safe to use, and saves labor.

Description

Electronic leg stretching device

[technical field]

The utility model relates to the technical field of body-building and medical equipment, the body-building that particularly shank stretches and the technical field of medical equipment.

[background technology]

Now a lot of people have the worry of O type leg, X-type leg, body development period malnutritive, long-term faulty posture, all can cause O type leg, X-type leg to the incorrect firmly custom of shank etc., raising along with nationwide fitness programs consciousness, the kind of body-building apparatus is increasingly various, as the arm strength extension spring, dumbbell, pedal etc., but the equipment that shank is continued to stretching is rarely found, the equipment performed physical exercise for O type leg and X-type leg is rare especially, and a lot of leg stretching device materials lack simple and effective human body fixed structure, and the most of leg stretching devices on market are all to rely on user's hand rotation rotating disk to drive transmission mechanism, thereby realize the stretching motion of leg stretching device, need to expend a large amount of muscle power, and the strength of human body is limited, after shank is stretched certain distance, only rely on the strength of hand to be difficult to continue again shank is stretched, therefore can not carry out to shank the stretching of continuous and effective.Secondly, while giving patient's planter cast of fracture in medical field, need to use leg stretching device to guarantee that patient's shank stretches, and the leg stretching device that at present a lot of medical institutions are used does not have backrest, and waistband is fixed on patient's crotch, such design makes the user easily injured when the stretching shank, has potential safety hazard.

[utility model content]

The purpose of this utility model solves the problems of the prior art exactly, a kind of electronic leg stretching device is proposed, being applicable to foot stretches, by foot's fixed mechanism and fixedly waistband the people is fixed on foot's stretcher, prevent the people due to the draw of leg stretching device to front slide, control leg stretching device by electric device simultaneously and shank carried out to the stretching of continuous and effective.

For achieving the above object, the utility model proposes a kind of electronic leg stretching device, comprise the shank drawing mechanism, electric device, foot's fixed mechanism, fixing waistband, backrest and some backrest connecting plates, foot's fixed mechanism and fixing waistband are installed on described shank drawing mechanism, between described shank drawing mechanism and backrest, by the backrest connecting plate, be connected, between shank drawing mechanism and backrest connecting plate, fixedly mount, between backrest and backrest connecting plate, rotatably install, described shank drawing mechanism comprises framework, screw rod, roller and transmission mechanism, described transmission mechanism is positioned at the inside of framework, described transmission mechanism comprises first connecting rod, second connecting rod and roller bearing, the upper end of described first connecting rod is connected by the first bearing pin with the upper end of second connecting rod, the lower end of described first connecting rod and the lower end of second connecting rod can be dynamically connected by roller bearing and screw rod respectively, the two ends of described roller bearing are installed with respectively two rollers, described screw surface is provided with the first screw thread of forward and the second reverse screw thread, described screw rod is positioned on framework, one end of described screw rod is provided with gear assembly, gear assembly comprises the first gear, the second gear, the first gear shaft, one end of described the first gear and screw rod is fixedly sleeved, the first gear shaft is fixedly mounted on the outside of framework, the second gear set is on the first gear shaft, between the first gear and the first gear shaft, engagement is installed, described electric device is arranged on a side of framework, electric device comprises motor, the second gear shaft, end cap, the first limit switch, the second limit switch and expansion controller, power supply, described the second gear shaft one end is connected with motor internal, the other end of the second gear shaft and the engagement of the second gear are installed, described end cap is enclosed within the outside of gear assembly and the second gear shaft, described the first limit switch is positioned at a side of screw rod, the first limit switch is corresponding with the roller near the first limit switch one side, described the second limit switch is positioned on second connecting rod, the second limit switch is corresponding with first connecting rod, be provided with control circuit in described expansion controller, described control circuit and power supply, the first limit switch is connected with the second limit switch, be provided with operating circuit in described motor, operating circuit is connected with control circuit.

As preferably, described shank drawing mechanism also comprises connection expansion link and is connected flexible interior bar, in described connection is flexible, bar is set in connection expansion link inside, offer some installing holes on bar in described connection is flexible, offer installing hole on described connection expansion link, in described connection is flexible, between bar and connection expansion link, by installing hole, with the second bearing pin, be fixedly connected with, described connection expansion link is connected with second connecting rod with first connecting rod.

As preferably, described roller bearing is cylinder with threaded hole, and the base laminating of described roller and framework is installed.

As preferably, described fixedly waistband comprises adjusts band, two connecting bands, at least one adjusting button, junction button, two slip rings, one end of described two connecting bands is with to adjusting by the slip ring cross-under respectively, article two, the other end of connecting band carries out snapping or opens by junction button, and described adjustment can regulate with being provided with at least one the adjusting button of adjusting the length of being with.

As preferably, described foot fixed mechanism comprises some upper foots fixed cover, some lower foots fixed cover, some sleeves, fixed gear plate, fixed bar, fixing loop bar, pedal, kelly, regulating handle, connecting axle and spring, described pedal is fixedly mounted on the end that connects flexible interior bar, be installed with sleeve on described fixedly loop bar, upper foot fixed cover is sleeved on sleeve, in described connection is flexible, bar is installed with sleeve, lower foot fixed cover is sleeved on sleeve, described fixed gear plate is arranged on the end that connects flexible interior bar, fixedly between loop bar and fixed gear plate, rotatably install, fixed bar is sleeved on the fixedly inside of loop bar, regulating handle is arranged on the upper end of fixed bar, between one end of described kelly and the lower end of fixed bar, rotatably install, the other end of kelly is stuck in the teeth groove of fluted disc, described connecting axle is through the middle part of kelly, the two ends of connecting axle are separately fixed on the outer wall of fixing loop bar, described spring is positioned at fixedly loop bar inside, one end of spring is connected with fixed bar, the other end is connected with the fixing inwall of loop bar.

As preferably, described control circuit is composed in parallel by forward control circuit and reverse control circuit, one end of control circuit is connected with the positive pole of power supply, the other end of control circuit is connected with the negative pole of power supply, described forward control circuit comprises the stretching button, the first drive wire bag J11 and the first diode D3, the second limit switch, stretching button and the first drive wire bag J11 are connected in circuit successively, the end of the first drive wire bag J11 is connected with the positive pole of the first diode D3, the other end of the first drive wire bag J11 is connected with the negative pole of the first diode D3, described reverse control circuit comprises retraction button, the second drive wire bag J21 and the second diode D4, the first limit switch, retraction button and the second drive wire bag J21 are connected in circuit successively, the end of the second drive wire bag J21 is connected with the positive pole of the second diode D4, the other end of the second drive wire bag J21 is connected with the negative pole of the second diode D4.

As preferably, described operating circuit comprises forward operating circuit and reverse operation circuit, described forward operating circuit comprises the first change-over switch K1, power supply the first positive terminal, power supply the first negative terminal and first relay J 1 corresponding with the first drive wire bag J11, described reverse operation circuit comprises the second change-over switch K2, power supply the second positive terminal, power supply the second negative terminal and second relay J 2 corresponding with the second drive wire bag J21, while not pressing stretching button or retraction button, the positive pole of motor contacts with power supply the first negative terminal in the forward operating circuit by the first change-over switch, the negative pole of motor contacts with power supply the second negative terminal in the reverse operation circuit by the second change-over switch, motor is in the no power state.

As preferably, also comprise base plate, some feets, back regulator, described back regulator coordinates installation with backrest, and described base plate is positioned at the below of framework, and base plate is connected with framework by feet.

The beneficial effects of the utility model: the utility model is used fixedly waistband that the human body waist is fixed on and establishes on backed leg stretching device; and with fixer for feet part, foot is fixed; prevent that the people is to front slide; and control the draw and shrink of transmission mechanism by electric device driven gear assembly; foot's fixed mechanism can be moved back and forth front and back; and protect leg stretching device with limit switch, prevent that it from excessively stretching or shrinking and damage, and uses more comfortable, safe, laborsaving.

Feature of the present utility model and advantage will be elaborated by reference to the accompanying drawings by embodiment.

[accompanying drawing explanation]

Fig. 1 is the structural representation of the electronic leg stretching device of the utility model;

Fig. 2 is the fixedly waistband schematic diagram of the electronic leg stretching device of the utility model;

Fig. 3 is the shank drawing mechanism schematic diagram of the electronic leg stretching device of the utility model;

Fig. 4 is foot's fixed mechanism schematic diagram of the electronic leg stretching device of the utility model;

Fig. 5 is the base plate of the electronic leg stretching device of the utility model and the structural representation of framework;

Fig. 6 is the circuit function schematic diagram of the electronic leg stretching device of the utility model;

Fig. 7 is the electrical block diagram of the electronic leg stretching device of the utility model.

[specific embodiment]

Consult Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the electronic leg stretching device of the utility model, comprise the shank drawing mechanism, electric device, foot's fixed mechanism, fixedly waistband 16, backrest 22 and some backrest connecting plates 17, foot's fixed mechanism and fixing waistband 16 are installed on described shank drawing mechanism, between described shank drawing mechanism and backrest 22, by backrest connecting plate 17, be connected, fixed installation between shank drawing mechanism and backrest connecting plate 17, between backrest 22 and backrest connecting plate 17, rotatably install, described shank drawing mechanism comprises framework 1, screw rod 5, roller 2 and transmission mechanism, described transmission mechanism is positioned at the inside of framework 1, described transmission mechanism comprises first connecting rod 3, second connecting rod 10 and roller bearing 6, the upper end of described first connecting rod 3 is connected by the first bearing pin 7 with the upper end of second connecting rod 10, the lower end of the lower end of described first connecting rod 3 and second connecting rod 10 can be dynamically connected by roller bearing 6 and screw rod 5 respectively, the two ends of described roller bearing 6 are installed with respectively two rollers 2, described screw rod 5 surfaces are provided with the first screw thread 51 of forward and the second reverse screw thread 52, described screw rod 5 is positioned on framework 1, one end of described screw rod 5 is provided with gear assembly, gear assembly comprises the first gear 8, the second gear 9, the first gear shaft 18, described the first gear 8 is fixedly sleeved with an end of screw rod 5, the first gear shaft 18 is fixedly mounted on the outside of framework 1, the second gear 9 is sleeved on the first gear shaft 18, between the first gear 8 and the first gear shaft 18, engagement is installed, described electric device is arranged on a side of framework 1, electric device comprises motor 4, the second gear shaft 19, end cap 44, the first limit switch 41, the second limit switch 42 and expansion controller 43, power supply 45, described the second gear shaft 19 1 ends are connected with motor 4 inside, the other end of the second gear shaft 19 and the second gear 9 engagements are installed, described end cap 44 is enclosed within the outside of gear assembly and the second gear shaft 19, described the first limit switch 41 is positioned at a side of screw rod 5, the first limit switch 41 is corresponding with the roller 2 near the first limit switch 41 1 sides, described the second limit switch 42 is positioned on second connecting rod 10, the second limit switch 42 is corresponding with first connecting rod 3, be provided with control circuit 46 in described expansion controller 43, described control circuit 46 and power supply 45, the first limit switch 41 is connected with the second limit switch 42, be provided with operating circuit 47 in described motor 4, operating circuit 47 is connected with control circuit 46, described shank drawing mechanism also comprises connection expansion link 86 and is connected flexible interior bar 87, in described connection is flexible, bar 87 is set in connection expansion link 86 inside, offer some installing holes 88 on bar 87 in described connection is flexible, offer installing hole 88 on described connection expansion link 86, in described connection is flexible, between bar 87 and connection expansion link 86, by installing hole 88, with the second bearing pin 89, be fixedly connected with, described connection expansion link 86 is connected with second connecting rod 10 with first connecting rod 3, described roller bearing 6 is cylinder with threaded hole, described roller 2 is installed with the base laminating of framework 1, described fixedly waistband 16 comprises adjusting is with 12, article two, connecting band 14, at least one adjusting button 11, junction button 15, two slip rings 13, one end of described two connecting bands 14 is with 12 by slip ring 13 cross-under to adjusting respectively, article two, the other end of connecting band 14 carries out snapping or opens by junction button 15, described adjustment is provided with at least one with 12 can regulate the adjusting button 11 of adjusting with 12 length, described foot fixed mechanism comprises some upper foots fixed cover 81, some lower foots fixed cover 82, some sleeves 83, fixed gear plate 84, fixed bar 85, fixedly loop bar 90, pedal 91, kelly 92, regulating handle 93, connecting axle 94 and spring 95, described pedal 91 is fixedly mounted on the end that connects flexible interior bar 87, be installed with sleeve 83 on described fixedly loop bar 90, upper foot fixed cover 81 is sleeved on sleeve 83, in described connection is flexible, bar 87 is installed with sleeve 83, lower foot fixed cover 82 is sleeved on sleeve 83, described fixed gear plate 84 is arranged on the end that connects flexible interior bar 87, fixedly between loop bar 90 and fixed gear plate 84, rotatably install, fixed bar 85 is sleeved on the fixedly inside of loop bar 90, regulating handle 93 is arranged on the upper end of fixed bar 85, between one end of described kelly 92 and the lower end of fixed bar 85, rotatably install, the other end of kelly 92 is stuck in the teeth groove of fluted disc 84, described connecting axle 94 is through the middle part of kelly 92, the two ends of connecting axle 94 are separately fixed on the outer wall of fixing loop bar 90, described spring 95 is positioned at fixedly loop bar 90 inside, one end of spring 95 is connected with fixed bar 85, the other end is connected with the fixing inwall of loop bar 90, also comprise base plate 20, some feets 21, back regulator 23, described back regulator 23 coordinates installation with backrest 22, described base plate 20 is positioned at the below of framework 1, base plate 20 is connected with framework 1 by feet 21.

Consult Fig. 3, Fig. 6 and Fig. 7, described control circuit 46 is composed in parallel by forward control circuit 461 and reverse control circuit 462, one end of control circuit 46 is connected with the positive pole of power supply 45, the other end of control circuit 46 is connected with the negative pole of power supply 45, described forward control circuit 461 comprises stretching button 432, the first drive wire bag J11 and the first diode D3, the second limit switch 42, stretching button 432 and the first drive wire bag J11 are connected in circuit successively, the end of the first drive wire bag J11 is connected with the positive pole of the first diode D3, the other end of the first drive wire bag J11 is connected with the negative pole of the first diode D3, described reverse control circuit 462 comprises retraction button 431, the second drive wire bag J21 and the second diode D4, the first limit switch, retraction button and the second drive wire bag J21 are connected in circuit successively, the end of the second drive wire bag J21 is connected with the positive pole of the second diode D4, the other end of the second drive wire bag J21 is connected with the negative pole of the second diode D4, described operating circuit 47 comprises forward operating circuit 471 and reverse operation circuit 472, described forward operating circuit 471 comprises the first change-over switch K1, power supply the first positive terminal, power supply the first negative terminal and first relay J 1 corresponding with the first drive wire bag J11, described reverse operation circuit 472 comprises the second change-over switch K2, power supply the second positive terminal, power supply the second negative terminal and second relay J 2 corresponding with the second drive wire bag J21, while not pressing stretching button 432 or retraction button 431, the positive pole of motor 4 contacts with power supply the first negative terminal of 471 in the forward operating circuit by the first change-over switch, the negative pole of motor 4 contacts with power supply the second negative terminal in reverse operation circuit 472 by the second change-over switch, motor 4 is in the no power state.

The machine work principle of electronic leg stretching device:

The electronic leg stretching device of the utility model in the course of the work, need fixedly waistband 16, the shank drawing mechanism, shank fixed mechanism and electric device are used in conjunction with each other, the user sits on shank stretching fitness equipment, by regulating back regulator 23, make backrest 22 be adjusted to comfortable position, bi-pedal is to foot pedal 91, hold regulating handle 93, the shank fixed mechanism is adjusted to suitable position fixes both feet, press regulating handle 93, kelly 92 is snapped onto in the teeth groove of fixed gear plate 84, the user is seated against backrest 22, buckle fixedly waistband 16, adjust the length of accommodation zone 12 by adjusting button 11, make fixedly waistband 16 that the human body waist is fixed on seat, then the user controls rotating and reverse of motor 4 by expansion controller 43, and then the motion of driven gear assembly, driving screw rod 5 by gear assembly again rotates, thereby drive roller bearing 6 transmissions, realize stretching or the contraction of operation transmission mechanism 17, thereby drive seesawing of foot's fixed mechanism, realize the effect of shank stretching, and O type leg and X-type leg are adjusted.

The circuit working principle of electronic leg stretching device:

When electronic leg stretching device is not worked, the positive pole of motor 4 contacts with power supply the first negative terminal of 471 in the forward operating circuit by the first change-over switch, the negative pole of motor 4 contacts with power supply the second negative terminal in reverse operation circuit 472 by the second change-over switch, and motor 4 is in the no power state.

When the user presses the stretching button 432 on expansion controller 43, 461 energisings of forward control circuit, thereby make the first drive wire bag J11 energising, the first drive wire bag J11 drives the first relay J 1 work, make the first change-over switch K1 in forward operating circuit 461 contact with power supply the first positive terminal, make the positive pole of motor 4 be connected with power supply the first positive terminal, the negative pole of motor 4 is connected with power supply the second negative terminal, thereby realize the forward of motor 4, realize the extensional motion of electronic leg stretching device, when electronic leg stretching device carries out extensional motion, the angle of first connecting rod 3 and second connecting rod 10 constantly diminishes, when first connecting rod 3 be positioned at second connecting rod on the second limit switch 42 of 10 while contacting, forward operating circuit 461 disconnects under the effect of the second limit switch 42, thereby make the first drive wire bag J11 outage, the first relay J 1 quits work, motor 4 returns to not "on" position, electronic leg stretching device quits work.

When the user presses the retraction button 432 on expansion controller 43, oppositely control circuit 462 energisings, thereby make the second drive wire bag J21 energising, the second drive wire bag J21 drives the second relay J 2 work, make the second change-over switch K1 in reverse operation circuit 462 contact with power supply the second positive terminal, make the negative pole of motor 4 be connected with power supply the second positive terminal, the positive pole of motor 4 is connected with power supply the first negative terminal, thereby realize the reversion of motor 4, realize the contractile motion of electronic leg stretching device, when electronic leg stretching device carries out contractile motion, it is large that distance on screw rod 5 between two rollers 2 constantly becomes, when one of them roller 2 contacts with the first limit switch 41, reverse operation circuit 462 disconnects under the effect of the first limit switch 41, thereby make the second drive wire bag J21 outage, the second relay J 2 quits work, motor 4 returns to not "on" position, electronic leg stretching device quits work.

Above-described embodiment is to explanation of the present utility model, is not to restriction of the present utility model, any scheme after the utility model simple transformation is all belonged to protection domain of the present utility model.

Claims

1. electronic leg stretching device, it is characterized in that: comprise the shank drawing mechanism, electric device, foot's fixed mechanism, fixing waistband (16), backrest (22) and some backrest connecting plates (17), foot's fixed mechanism and fixing waistband (16) are installed on described shank drawing mechanism, between described shank drawing mechanism and backrest (22), by backrest connecting plate (17), be connected, fixed installation between shank drawing mechanism and backrest connecting plate (17), between backrest (22) and backrest connecting plate (17), rotatably install, described shank drawing mechanism comprises framework (1), screw rod (5), roller (2) and transmission mechanism, described transmission mechanism is positioned at the inside of framework (1), described transmission mechanism comprises first connecting rod (3), second connecting rod (10) and roller bearing (6), the upper end of described first connecting rod (3) is connected by the first bearing pin (7) with the upper end of second connecting rod (10), the lower end of the lower end of described first connecting rod (3) and second connecting rod (10) can be dynamically connected by roller bearing (6) and screw rod (5) respectively, the two ends of described roller bearing (6) are installed with respectively two rollers (2), described screw rod (5) surface is provided with first screw thread (51) of forward and reverse the second screw thread (52), described screw rod (5) is positioned on framework (1), one end of described screw rod (5) is provided with gear assembly, gear assembly comprises the first gear (8), the second gear (9), the first gear shaft (18), described the first gear (8) is fixedly sleeved with an end of screw rod (5), the first gear shaft (18) is fixedly mounted on the outside of framework (1), the second gear (9) is sleeved on the first gear shaft (18), between the first gear (8) and the first gear shaft (18), engagement is installed, described electric device is arranged on a side of framework (1), electric device comprises motor (4), the second gear shaft (19), end cap (44), the first limit switch (41), the second limit switch (42) and expansion controller (43), power supply (45), described the second gear shaft (19) one ends are connected with motor (4) inside, the other end of the second gear shaft (19) and the second gear (9) engagement are installed, described end cap (44) is enclosed within the outside of gear assembly and the second gear shaft (19), described the first limit switch (41) is positioned at a side of screw rod (5), the first limit switch (41) is corresponding with the roller (2) near the first limit switch (41) one sides, described the second limit switch (42) is positioned on second connecting rod (10), the second limit switch (42) is corresponding with first connecting rod (3), be provided with control circuit (46) in described expansion controller (43), described control circuit (46) and power supply (45), the first limit switch (41) is connected with the second limit switch (42), be provided with operating circuit (47) in described motor (4), operating circuit (47) is connected with control circuit (46).

2. electronic leg stretching device as claimed in claim 1, it is characterized in that: described shank drawing mechanism also comprises connection expansion link (86) and is connected flexible interior bar (87), in described connection is flexible, bar (87) is set in connection expansion link (86) inside, offer some installing holes (88) on bar (87) in described connection is flexible, offer installing hole (88) on described connection expansion link (86), in described connection is flexible, between bar (87) and connection expansion link (86), by installing hole (88), with the second bearing pin (89), be fixedly connected with, described connection expansion link (86) is connected with second connecting rod (10) with first connecting rod (3).

3. electronic leg stretching device as claimed in claim 1, it is characterized in that: described roller bearing (6) is cylinder with threaded hole, described roller (2) is installed with the base laminating of framework (1).

4. electronic leg stretching device as claimed in claim 1, it is characterized in that: described fixedly waistband (16) comprises adjusts band (12), two connecting bands (14), at least one adjusting button (11), junction button (15), two slip rings (13), one end of described two connecting bands (14) is with (12) by slip ring (13) cross-under to adjusting respectively, article two, the other end of connecting band (14) carries out snapping or opens by junction button (15), and described adjustment band (12) is provided with at least one adjusting button (11) that can regulate the length of adjusting band (12).

5. electronic leg stretching device as claimed in claim 1, it is characterized in that: described foot fixed mechanism comprises some upper foot fixed covers (81), some lower foot fixed covers (82), some sleeves (83), fixed gear plate (84), fixed bar (85), fixing loop bar (90), pedal (91), kelly (92), regulating handle (93), connecting axle (94) and spring (95), described pedal (91) is fixedly mounted on the end that connects flexible interior bar (87), be installed with sleeve (83) on described fixedly loop bar (90), upper foot fixed cover (81) is sleeved on sleeve (83), in described connection is flexible, bar (87) is installed with sleeve (83), lower foot fixed cover (82) is sleeved on sleeve (83), described fixed gear plate (84) is arranged on the end that connects flexible interior bar (87), fixedly between loop bar (90) and fixed gear plate (84), rotatably install, fixed bar (85) is sleeved on the fixedly inside of loop bar (90), regulating handle (93) is arranged on the upper end of fixed bar (85), between the lower end of one end of described kelly (92) and fixed bar (85), rotatably install, the other end of kelly (92) is stuck in the teeth groove of fluted disc (84), described connecting axle (94) is through the middle part of kelly (92), the two ends of connecting axle (94) are separately fixed on the outer wall of fixing loop bar (90), described spring (95) is positioned at fixedly loop bar (90) inside, one end of spring (95) is connected with fixed bar (85), the other end is connected with the fixing inwall of loop bar (90).

6. electronic leg stretching device as claimed in claim 1, it is characterized in that: described control circuit (46) is composed in parallel by forward control circuit (461) and reverse control circuit (462), one end of control circuit (46) is connected with the positive pole of power supply (45), the other end of control circuit (46) is connected with the negative pole of power supply (45), described forward control circuit (461) comprises stretching button (432), the first drive wire bag J11 and the first diode D3, the second limit switch (42), stretching button (432) and the first drive wire bag J11 are connected in circuit successively, the end of the first drive wire bag J11 is connected with the positive pole of the first diode D3, the other end of the first drive wire bag J11 is connected with the negative pole of the first diode D3, described reverse control circuit (462) comprises retraction button (431), the second drive wire bag J21 and the second diode D4, the first limit switch, retraction button and the second drive wire bag J21 are connected in circuit successively, the end of the second drive wire bag J21 is connected with the positive pole of the second diode D4, the other end of the second drive wire bag J21 is connected with the negative pole of the second diode D4.

7. electronic leg stretching device as claimed in claim 1, it is characterized in that: described operating circuit (47) comprises forward operating circuit (471) and reverse operation circuit (472), described forward operating circuit (471) comprises the first change-over switch K1, power supply the first positive terminal, power supply the first negative terminal and first relay J 1 corresponding with the first drive wire bag J11, described reverse operation circuit (472) comprises the second change-over switch K2, power supply the second positive terminal, power supply the second negative terminal and second relay J 2 corresponding with the second drive wire bag J21, while not pressing stretching button (432) or retraction button (431), the positive pole of motor (4) contacts with power supply first negative terminal of (471) in the forward operating circuit by the first change-over switch, the negative pole of motor (4) contacts with power supply the second negative terminal in reverse operation circuit (472) by the second change-over switch, motor (4) is in the no power state.

8. electronic leg stretching device as described as any one in claim 1 to 7, it is characterized in that: also comprise base plate (20), some feets (21), back regulator (23), described back regulator (23) coordinates installation with backrest (22), described base plate (20) is positioned at the below of framework (1), and base plate (20) is connected with framework (1) by feet (21).