CN215584762U

CN215584762U - Hand-free crutch with adjustable shank supporting angle

Info

Publication number: CN215584762U
Application number: CN202022319264.7U
Authority: CN
Inventors: 纪律
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2022-01-21
Anticipated expiration: 2030-10-16

Abstract

The utility model relates to a hand-free crutch with an adjustable shank supporting angle, which comprises a thigh saddle, a thigh restraint strap, a leg platform, a shank restraint strap, an upper supporting piece, a lower supporting piece and a foot piece, and is characterized in that: the supporting leg platform comprises a platform seat, a supporting leg plate and an inclined supporting rod, wherein a fixed support is arranged on the upper surface of the platform seat, a movable support is arranged on the lower surface of the front end of the supporting leg plate, and the movable support is butted with the fixed support and locked and fixed through a locking bolt; the lower end of the diagonal brace is connected with the lower supporting piece, the upper end of the diagonal brace is hinged with the movable block, the bottom of the leg plate is provided with an installation groove along the length direction of the leg plate, the movable block is arranged in the installation groove and can move along the length direction of the installation groove, and an adjusting and locking component is arranged between the movable block and the leg plate. The utility model has the advantages of ingenious structure and reasonable design, the inclination angle of the landing leg platform can be flexibly adjusted, the landing leg platform is particularly suitable for patients who cannot bend the shank at 90 degrees due to the problem of knee joints, and the patients can feel comfortable and convenient when walking.

Description

Hand-free crutch with adjustable shank supporting angle

Technical Field

The utility model relates to a crutch, in particular to a hand-free crutch with an adjustable shank supporting angle, belonging to the technical field of medical rehabilitation auxiliary appliances.

Background

The walking stick is a medical rehabilitation auxiliary tool suitable for being used by handicapped persons such as the old, the disabled and the like, but the walking stick commonly used at present needs to be supported by hands, for some users with injured legs and needing to use both hands, the existing walking stick needing to be supported by hands cannot meet the requirements, and some artificial limbs needing not to be supported by hands are also suitable for patients with incomplete legs, and for patients with injured legs but without incomplete legs, the artificial limbs cannot be used.

Patent application No. CN201280063131.3 discloses a hands-free crutch including a leg platform on which a strap can be used to hold the leg in a forward position and a ground contact, and a thigh saddle that can help prevent lateral movement of the user's thigh relative to the crutch. However, according to the feedback of the patient, the hand-free crutch has the following defects in practical use: 1. the supporting leg platform of the hand-free crutch is horizontally fixed, and for some patients with knee joints having problems and the crus of which cannot be bent by 90 degrees, the supporting leg platform cannot meet the use requirement; 2. this hands-free walking stick lacks the reliable part that supplies the patient to support, though is provided with the handle at the thigh saddle, the position of handle is lower, and the patient mostly needs to bend over when using, and short time use is still not big, but if the patient bends over for a long time and supports the handle, then produces tired sense very easily.

Therefore, there is a need for an improved design of the existing hands-free crutch to overcome the above-mentioned problems during the use thereof.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides a hand-free crutch with an adjustable supporting angle for crus, which has the advantages of ingenious structure, reasonable design and flexible adjustment of the inclination angle of a supporting leg platform, is particularly suitable for patients who cannot bend crus at 90 degrees due to knee joint problems, and can enable the patients to feel comfortable and convenient when walking.

According to the technical scheme provided by the utility model: the hand-free crutch with the adjustable shank supporting angle comprises a thigh saddle, a thigh restraint belt, a leg platform, a shank restraint belt, an upper supporting piece, a lower supporting piece and a foot piece, wherein the lower end of the upper supporting piece is connected with the leg platform, the upper end of the upper supporting piece is connected with the thigh saddle, the thigh restraint belt is installed on the thigh saddle, the shank restraint belt is installed on the leg platform, the upper end of the lower supporting piece is connected with the bottom of the leg platform, and the foot piece is installed at the lower end of the lower supporting piece; the method is characterized in that: the supporting leg platform comprises a platform seat, a supporting leg plate and an inclined supporting rod, wherein a fixed support is arranged on the upper surface of the platform seat, a movable support is arranged on the lower surface of the front end of the supporting leg plate, and the movable support is in butt joint with the fixed support and is locked and fixed through a locking bolt; the lower end of the inclined strut is connected with the lower supporting piece, the upper end of the inclined strut is hinged with the movable block, the bottom of the leg plate is provided with an installation groove along the length direction of the leg plate, the movable block is arranged in the installation groove and can move along the length direction of the installation groove, and an adjusting and locking component is arranged between the movable block and the leg plate.

As a further improvement of the utility model, the adjusting and locking member comprises an adjusting bolt, a plurality of fixed screw holes are uniformly distributed in the mounting groove at equal intervals along the length direction, the movable block is provided with a movable through hole, and the movable block is fixed on the leg plate through the adjusting bolt penetrating through the movable through hole.

As a further improvement of the utility model, the thigh saddle comprises a saddle, a side saddle and a fixing screw, wherein the saddle is arc-shaped, saddle through holes are respectively formed in the two ends of the saddle, saddle connecting blocks are respectively arranged on the back sides of the two ends of the saddle, and arc-shaped long holes are formed in the saddle connecting blocks; the side saddle comprises a leg attaching saddle plate and a saddle connecting block integrally arranged on the back of the leg attaching saddle plate, and a saddle through hole and a screw mounting hole are formed in the saddle connecting block; the two side saddles are symmetrically arranged at the inner end and the outer end of the saddle, the saddle through hole is vertically aligned with the saddle through hole, the upper supporting piece comprises an outer telescopic rod and an inner telescopic rod, the upper end of the inner telescopic rod is inserted in the saddle through hole of the side saddle at the inner side and the saddle through hole at the inner end of the saddle, and the upper end of the outer telescopic rod is inserted in the saddle through hole of the side saddle at the outer side and the saddle through hole at the outer end of the saddle; the arc-shaped long hole corresponds to the screw mounting hole, and the fixing screw penetrates through the arc-shaped long hole and is in threaded connection with the screw mounting hole; two ends of the thigh restraint strap are respectively connected to the leg attaching saddle plates of the two side saddles.

As a further improvement of the utility model, the lower side edge of the inner surface of the saddle is provided with a widened part extending downwards.

As a further improvement of the utility model, an auxiliary handle is arranged on the thigh saddle.

As a further improvement of the utility model, the auxiliary handle comprises a handle, a handle rod and a handle rod seat, the handle is arranged at the upper end of the handle rod, the lower end of the handle rod is connected to the upper part of one end of the handle rod seat, the other end of the handle rod seat is provided with a first handle fixing hole, the middle part of the handle rod seat is provided with a second handle fixing hole, the middle part of the saddle platform is provided with a first saddle platform fixing hole, the outer end of the saddle platform is provided with a second saddle platform fixing hole, a first fastening screw is arranged in the first handle fixing hole and the first saddle platform fixing hole, a second fastening screw is arranged in the second handle fixing hole and the second saddle platform fixing hole, and the handle rod seat is fixed on the saddle platform through the first fastening screw and the second fastening screw.

As a further improvement of the present invention, the lower support member includes a telescopic main support rod, two side support rods and a first adjustable clamp, the upper end of the telescopic main support rod is connected to the front end of the landing leg platform, the lower end of the telescopic main support rod is provided with the foot member, two ends of the front side edge of the platform base bottom surface are provided with fixed cylinders, the upper end of the side support rod is inserted into the fixed cylinders and is fastened by screws, and the lower end of the side support rod is fixedly connected with the telescopic main support rod by the first adjustable clamp.

As a further improvement of the utility model, the first adjustable clamp comprises a first clamp ring, a first locking bolt and a first locking nut, the first clamp ring surrounds the lower end of an outer sleeve of the telescopic main support rod, and the lower end of the outer sleeve is provided with a contraction port; first locking bolt passes the otic placode at first clamp circle both ends and installs first lock nut, and first locking bolt and first lock nut all are equipped with the grab handle of being convenient for revolve wrong.

As a further improvement of the utility model, the lower end of the diagonal brace is connected to the telescopic main brace through a second adjustable clamp, the second adjustable clamp comprises a second clamp ring, a second locking bolt and a second locking nut, the second clamp ring surrounds the outer sleeve of the telescopic main brace, the second clamp ring is provided with a abdicating groove, and the abdicating groove is used for abdicating a set screw of the telescopic main brace; the second locking bolt passes through the lug plates at the two ends of the second clamping ring and is provided with a second locking nut, and the second locking bolt and the second locking nut are provided with grab handles convenient for screwing.

Compared with the prior art, the utility model has the following advantages:

1) the utility model has the advantages of ingenious structure and reasonable design, the inclination angle of the landing leg platform can be flexibly adjusted, the landing leg platform is particularly suitable for patients who cannot bend the crus at 90 degrees due to knee joint problems, and the patients can feel comfortable and convenient when walking.

2) The overall shape of the thigh saddle can be flexibly adjusted according to the leg circumference of a patient, so that the thigh saddle can be better attached to the front side, the left side and the right side of the thigh of the patient, and the restraint fixing effect is ensured.

3) The auxiliary handle which can be conveniently detached is arranged in the walking aid, so that the walking aid is convenient for a patient to hold when the patient walks, and is comfortable, labor-saving and safe.

Drawings

FIG. 1 is a front view of the structure of an embodiment of the present invention.

Fig. 2 is a structural side view of an embodiment of the present invention.

Fig. 3 is a schematic perspective view of a lower half of the embodiment of the present invention.

Fig. 4 is a schematic perspective view of the upper half of the embodiment of the utility model.

Description of reference numerals: 1-thigh saddle, 1.1-saddle, 1.1 a-saddle connecting block, 1.1 b-arc long hole, 1.2-side saddle, 1.2 a-leg-attaching saddle plate, 1.2 b-saddle connecting block, 1.3-fixing screw, 2-thigh restraint strap, 3-leg platform, 3.1-platform seat, 3.1 a-fixing support, 3.2-leg support plate, 3.2 a-movable support, 3.2 b-mounting groove, 3.2 c-fixing screw hole, 3.3-diagonal brace, 3.4-locking bolt, 3.5-movable block, 3.5 a-movable through hole, 4-shank restraint strap, 5-upper support piece, 5.1-outer extension bar, 5.2-inner extension bar, 6-lower support piece, 6.1-telescopic main brace, 6.2-side support bar, 7-foot piece, 8-auxiliary grip, 8.1-handle, 8.2-handle, 8.3-handle seat, 8.4-first fastening screw, 8.5-second fastening screw, 9-first adjustable clamp, 9.1-first clamp ring, 9.2-first locking bolt, 9.3-first locking nut, 10-second adjustable clamp, 10.1-second clamp ring, 10.2-second locking bolt and 10.3-second locking nut.

Detailed Description

The utility model is further illustrated by the following specific figures and examples.

As shown in fig. 1 to 4, the embodiment discloses a hand-free crutch with an adjustable supporting angle for crus, which comprises a thigh saddle 1, a thigh restraint strap 2, a leg platform 3, a crus restraint strap 4, an upper support 5, a lower support 6 and a foot 7, wherein the lower end of the upper support 5 is connected with the leg platform 3, the upper end of the upper support 5 is connected with the thigh saddle 1, the thigh restraint strap 2 is installed on the thigh saddle 1, the crus restraint strap 4 is installed on the leg platform 3, the upper end of the lower support 6 is connected with the bottom of the leg platform 3, and the lower end of the lower support 6 is provided with the foot 7; the supporting leg platform 3 comprises a platform base 3.1, a supporting leg plate 3.2 and an inclined strut 3.3, a fixed support 3.1a is arranged on the upper surface of the platform base 3.1, a movable support 3.2a is arranged on the lower surface of the front end of the supporting leg plate 3.2, and the movable support 3.2a is in butt joint with the fixed support 3.1a and is locked and fixed through a locking bolt 3.4; the lower end of the inclined strut 3.3 is connected with a lower supporting piece 6, the upper end of the inclined strut 3.3 is hinged with a movable block 3.5, the bottom of the leg plate 3.2 is provided with an installation groove 3.2b along the length direction of the leg plate 3.2, the movable block 3.5 is arranged in the installation groove 3.2b and can move along the length direction of the installation groove 3.2b, and an adjusting and locking component is arranged between the movable block 3.5 and the leg plate 3.2.

During the specific use, the affected limb of patient's one side that needs to support is crooked, and the shank is placed on landing leg platform 3 and is restrained fixedly by shank restraint strap 4, and patient's thigh front side supports and leans on thigh saddle 1 and utilizes thigh restraint strap 2 to restrain fixedly. When some patients cannot bend the lower leg by 90 degrees due to the problem of the knee joint, the inclination angle of the leg platform 3 needs to be adjusted according to the individual condition of the patients. During the regulation, at first unblock regulation locking member makes movable block 3.5 can freely remove at mounting groove 3.2b, through adjusting the position of movable block 3.5 at mounting groove 3.2b, just can drive the rear end of platform seat 3.1 and lift up or descend, after platform seat 3.1 adjusts suitable angle, readjusts locking member locking, just accomplishes the inclination adjustment of landing leg platform 3, patient's shank just so can fix on landing leg platform 3 with comfortable gesture.

As shown in fig. 3, in this embodiment, the adjusting and locking member includes an adjusting bolt, a plurality of fixing screw holes 3.2c are uniformly distributed in the mounting groove 3.2b at equal intervals along the length direction, a movable through hole 3.5a is formed in the movable block 3.5, and the movable block 3.5 is fixed on the leg plate 3.2 by the adjusting bolt passing through the movable through hole 3.5 a.

As shown in fig. 4, in the present embodiment, the thigh saddle 1 includes a saddle 1.1, a side saddle 1.2 and a fixing screw 1.3, the saddle 1.1 is arc-shaped, saddle through holes are respectively opened at both ends of the saddle 1.1, saddle connecting blocks 1.1a are respectively arranged at the back sides of both ends of the saddle 1.1, and arc-shaped long holes 1.1b are opened in the saddle connecting blocks 1.1 a; the side saddle 1.2 comprises a leg attaching saddle plate 1.2a and a saddle connecting block 1.2b integrally arranged on the back of the leg attaching saddle plate 1.2a, and a saddle through hole and a screw mounting hole are formed in the saddle connecting block 1.2 b; the two side saddles 1.2 are symmetrically arranged at the inner end and the outer end of the saddle 1.1, saddle through holes are vertically aligned with the saddle through holes, the upper supporting piece 5 comprises an outer telescopic rod 5.1 and an inner telescopic rod 5.2, the upper end of the inner telescopic rod 5.2 is inserted into the saddle through hole of the side saddle 1.2 at the inner side and the saddle through hole at the inner end of the saddle 1.1, and the upper end of the outer telescopic rod 5.1 is inserted into the saddle through hole of the side saddle 1.2 at the outer side and the saddle through hole at the outer end of the saddle 1.1; the arc-shaped long hole 1.1b corresponds to the screw mounting hole, and the fixing screw 1.3 penetrates through the arc-shaped long hole 1.1b and then is in threaded connection with the screw mounting hole; two ends of the thigh restraint strap 2 are respectively connected to the leg attaching saddle plates 1.2a of the two side saddles 1.2. So set up, thigh saddle 1's whole shape can be adjusted according to patient's leg circumstances is nimble, ensures that thigh saddle 1 can laminate the front side and the left and right sides of patient's thigh better, guarantees the fixed effect of restraint.

In the present embodiment, as shown in fig. 1, the lower side of the inner surface of the saddle 1.1 is provided with a widened portion extending downward. So set up, increased the area of contact of thigh saddle 1 with patient's thigh, improve the travelling comfort that the patient used.

As shown in fig. 1 and 2, in the present embodiment, the thigh saddle 1 is provided with an auxiliary grip 8, so that the patient can conveniently hold the thigh saddle while walking, and the thigh saddle is comfortable, labor-saving and safe.

As shown in fig. 1, 2 and 4, in this embodiment, the auxiliary handle 8 includes a handle 8.1, a handle 8.2 and a handle base 8.3, the handle 8.1 is mounted on the upper end of the handle 8.2, the lower end of the handle 8.2 is connected to the upper portion of one end of the handle base 8.3, the other end of the handle base 8.3 is provided with a first handle fixing hole, the middle of the handle base 8.3 is provided with a second handle fixing hole, the middle of the saddle 1.1 is provided with a first saddle fixing hole, the outer end of the saddle 1.1 is provided with a second saddle fixing hole, the first handle fixing hole and the first saddle fixing hole are internally provided with a first fastening screw 8.4, the second handle fixing hole and the second saddle fixing hole are internally provided with a second fastening screw 8.5, and the handle base 8.3 is fixed on the saddle 1.1 through the first fastening screw 8.4 and the second fastening screw 8.5. So set up, supplementary handle 8 can be installed according to patient's needs and go or dismantle, and the outside at thigh saddle 1 is installed to supplementary handle 8's position, is convenient for like this to support.

As shown in fig. 1 to 3, in the present embodiment, the lower supporting member 6 includes a telescopic main supporting rod 6.1 and two side supporting rods 6.2, an upper end of the telescopic main supporting rod 6.1 is connected to a front end of the leg platform 3, and a lower end of the telescopic main supporting rod 6.1 is mounted with the foot 7; the both ends of side limit are equipped with the solid fixed cylinder before the platform seat 3.1 bottom surface, side vaulting pole 6.2 upper end is pegged graft in solid fixed cylinder and is fastened through the screw, and side vaulting pole 6.2 lower extreme passes through first adjustable clamp 9 and telescopic main stay 6.1 fixed connection. So set up, the length of lower support piece 6 can be adjusted in a flexible way, and landing leg platform 3 supports through telescopic main stay bar 6.1 and two side stay bars 6.2, and the structure is also more firm reliable.

As shown in fig. 3, in this embodiment, the first adjustable clamp 9 includes a first clamp ring 9.1, a first locking bolt 9.2, and a first locking nut 9.3, where the first clamp ring 9.1 surrounds a lower end of an outer sleeve of the telescopic main support rod 6.1, and a contraction port is formed at the lower end of the outer sleeve; the first locking bolt 9.2 passes through the ear plates at the two ends of the first clamp ring 9.1 and is provided with a first locking nut 9.3, and the first locking bolt 9.2 and the first locking nut 9.3 are provided with handles convenient for screwing.

As shown in fig. 3, in this embodiment, the lower end of the diagonal brace 3.3 is connected to the telescopic main brace 6.1 through a second adjustable clamp 10, where the second adjustable clamp 10 includes a second clamp ring 10.1, a second locking bolt 10.2, and a second locking nut 10.3, the second clamp ring 10.1 surrounds the outer sleeve of the telescopic main brace 6.1, and the second clamp ring 10.1 is provided with an abdicating groove, where the abdicating groove is used for abdicating the set screw of the telescopic main brace 6.1; the second locking bolt 10.2 passes the otic placode at second clamp ring 10.1 both ends and installs second lock nut 10.3, and second locking bolt 10.2 and second lock nut 10.3 all are equipped with the grab handle of being convenient for revolve wrong.

In the present invention, the lower leg restraint strap 4 and the thigh restraint strap 2 can be made of a conventional product with binding and fixing purposes in the prior art, and the foot piece 7 can also be made of a product with similar functions in the prior art, and they are not technical innovation points of the present application, so the structures of the above parts are not further detailed here.

The above description is only for the preferred embodiment of the present invention, and the above specific embodiments are not intended to limit the present invention. Various modifications and alterations may occur to those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and alterations should be accorded the broadest interpretation so as to encompass all such modifications and alterations.

Claims

1. The hand-free crutch with the adjustable shank supporting angle comprises a thigh saddle (1), a thigh restraint strap (2), a leg platform (3), a shank restraint strap (4), an upper supporting piece (5), a lower supporting piece (6) and a foot piece (7), wherein the lower end of the upper supporting piece (5) is connected with the leg platform (3), the upper end of the upper supporting piece (5) is connected with the thigh saddle (1), the thigh restraint strap (2) is installed on the thigh saddle (1), the shank restraint strap (4) is installed on the leg platform (3), the upper end of the lower supporting piece (6) is connected to the bottom of the leg platform (3), and the foot piece (7) is installed at the lower end of the lower supporting piece (6); the method is characterized in that: the supporting leg platform (3) comprises a platform base (3.1), a supporting leg plate (3.2) and an inclined supporting rod (3.3), a fixed support (3.1a) is arranged on the upper surface of the platform base (3.1), a movable support (3.2a) is arranged on the lower surface of the front end of the supporting leg plate (3.2), and the movable support (3.2a) is in butt joint with the fixed support (3.1a) and is locked and fixed through a locking bolt (3.4); the lower end of the inclined strut (3.3) is connected with a lower supporting piece (6), the upper end of the inclined strut (3.3) is hinged with a movable block (3.5), the bottom of the leg plate (3.2) is provided with an installation groove (3.2b) along the length direction of the leg plate (3.2), the movable block (3.5) is arranged in the installation groove (3.2b) and can move along the length direction of the installation groove (3.2b), and an adjusting and locking component is arranged between the movable block (3.5) and the leg plate (3.2).

2. The hand-free crutch with adjustable lower leg support angle of claim 1, characterized in that: the adjusting and locking component comprises an adjusting bolt, a plurality of fixing screw holes (3.2c) are formed in the mounting groove (3.2b) and are uniformly distributed at equal intervals along the length direction, a movable through hole (3.5a) is formed in the movable block (3.5), and the movable block (3.5) is fixed on the leg supporting plate (3.2) through the adjusting bolt penetrating through the movable through hole (3.5 a).

3. The hand-free crutch with adjustable lower leg support angle of claim 1, characterized in that: the thigh saddle (1) comprises a saddle (1.1), side saddles (1.2) and fixing screws (1.3), wherein the saddle (1.1) is arc-shaped, saddle through holes are respectively formed in two ends of the saddle (1.1), saddle connecting blocks (1.1a) are respectively arranged on the back sides of the two ends of the saddle (1.1), and arc-shaped long holes (1.1b) are formed in the saddle connecting blocks (1.1 a); the side saddle (1.2) comprises a leg attaching saddle plate (1.2a) and a saddle connecting block (1.2b) integrally arranged on the back of the leg attaching saddle plate (1.2a), and a saddle through hole and a screw mounting hole are formed in the saddle connecting block (1.2 b); the two side saddles (1.2) are symmetrically arranged at the inner end and the outer end of the saddle (1.1), the saddle through hole is vertically aligned with the saddle through hole, the upper supporting piece (5) comprises an outer telescopic rod (5.1) and an inner telescopic rod (5.2), the upper end of the inner telescopic rod (5.2) is inserted into the saddle through hole of the side saddle (1.2) at the inner side and the saddle through hole at the inner end of the saddle (1.1), and the upper end of the outer telescopic rod (5.1) is inserted into the saddle through hole of the side saddle (1.2) at the outer side and the saddle through hole at the outer end of the saddle (1.1); the arc-shaped long hole (1.1b) corresponds to the screw mounting hole, and the fixing screw (1.3) penetrates through the arc-shaped long hole (1.1b) and then is in threaded connection with the screw mounting hole; two ends of the thigh restraint strap (2) are respectively connected to leg attaching saddle plates (1.2a) of the two side saddles (1.2).

4. The hand-free crutch with adjustable lower leg support angle of claim 3, characterized in that: the lower side edge of the inner surface of the saddle (1.1) extends downwards to form a widened part.

5. The hand-free crutch with adjustable lower leg support angle of claim 3, characterized in that: an auxiliary grip (8) is arranged on the thigh saddle (1).

6. The hand-free crutch with adjustable lower leg support angle of claim 5, characterized in that: the auxiliary handle (8) comprises a handle (8.1), a handle rod (8.2) and a handle rod seat (8.3), the handle (8.1) is installed at the upper end of the handle rod (8.2), the lower end of the handle rod (8.2) is connected to the upper portion of one end of the handle rod seat (8.3), a first handle fixing hole is formed in the other end of the handle rod seat (8.3), a second handle fixing hole is formed in the middle of the handle rod seat (8.3), a first saddle fixing hole is formed in the middle of the saddle (1.1), a second saddle fixing hole is formed in the outer end of the saddle (1.1), a first fastening screw (8.4) is installed in the first handle fixing hole and the first saddle fixing hole, a second fastening screw (8.5) is installed in the second handle fixing hole and the second saddle fixing hole, and the handle rod seat (8.3) is fixed to the saddle (1.1) through the first fastening screw (8.4) and the second fastening screw (8.5).

7. The hand-free crutch with adjustable lower leg support angle of claim 1, characterized in that: lower support piece (6) are including telescopic main stay (6.1), two side stay (6.2) and first adjustable clamp (9), the front end of landing leg platform (3) is connected to the upper end of telescopic main stay (6.1), and the lower extreme installation of telescopic main stay (6.1) sufficient piece (7), the both ends of platform seat (3.1) bottom surface front side are equipped with the solid fixed cylinder, side stay (6.2) upper end is pegged graft in the solid fixed cylinder and is fastened through the screw, and side stay (6.2) lower extreme is through first adjustable clamp (9) and telescopic main stay (6.1) fixed connection.

8. The hand-free crutch with adjustable lower leg support angle of claim 7, further comprising: the first adjustable clamp (9) comprises a first clamp ring (9.1), a first locking bolt (9.2) and a first locking nut (9.3), the first clamp ring (9.1) surrounds the lower end of an outer sleeve of the telescopic main support rod (6.1), and the lower end of the outer sleeve is provided with a contraction port; first locking bolt (9.2) pass the otic placode at first clamp ring (9.1) both ends and install first lock nut (9.3), and first locking bolt (9.2) and first lock nut (9.3) all are equipped with the grab handle of being convenient for revolve wrong.

9. The hand-free crutch with adjustable lower leg support angle of claim 7, further comprising: the lower end of the inclined strut (3.3) is connected to the telescopic main strut (6.1) through a second adjustable clamp (10), the second adjustable clamp (10) comprises a second clamp ring (10.1), a second locking bolt (10.2) and a second locking nut (10.3), the second clamp ring (10.1) surrounds the outer sleeve of the telescopic main strut (6.1), the second clamp ring (10.1) is provided with an abdicating groove, and the abdicating groove is used for abdicating a fastening screw of the telescopic main strut (6.1); the second locking bolt (10.2) passes through the lug plates at the two ends of the second clamp ring (10.1) and is provided with a second locking nut (10.3), and the second locking bolt (10.2) and the second locking nut (10.3) are provided with handles convenient for screwing.