WO2021015476A1

WO2021015476A1 - Crutch

Info

Publication number: WO2021015476A1
Application number: PCT/KR2020/009245
Authority: WO
Inventors: 김영태; 김경희
Original assignee: 김영태; 김경희
Priority date: 2019-07-25
Filing date: 2020-07-14
Publication date: 2021-01-28
Also published as: KR20210012458A

Abstract

A crutch comprises: a support leg having multiple guide rollers; an armpit prop rotatably fastened to the support leg while being supported by the multiple guide rollers; and a handle fastened to the support leg. The armpit prop has a recessed support surface for supporting the user's armpit and is thereby fastened to the support leg to be able to make a revolving movement around a center of rotation positioned above the recessed support surface. The armpit prop has a first guide surface formed thereon such that the revolving movement can proceed while same contacts at least some of the multiple guide rollers. The part of the armpit prop, which forms the recessed support surface for supporting the user's armpit, can rotate with regard to the center of rotation while forming a guide surface supported by a roller of an upper shaft such that same can stably support the armpit while being supported by the roller in a simple structure.

Description

Crutches

The present invention relates to a walking aid for a patient with a lower limb disorder, a crutch.

Crutches are walking aids for patients with lower extremity disorders, and are classified into auxiliary crutch and forearm crutch depending on which part of the body the body supports when walking. Also, depending on the type of injury, these two types of crutches may be transformed and used.

Axillary crutches are standard with two vertical posts made of wood or aluminum pipes, a stand to support the armpit area, and a crutches handle positioned between them. Compared to other types of crutches, axillary crutches are widely used as walking aids for patients with lower extremity disorders because they generally have higher weight bearing capacity and easy to maintain stability and balance of lower extremities.

The correct use of axillary crutches is to support the weight with the arm that touches the crutches handle and walk with the armpit support so that the outer wall of the rib cage is at the height of the chest wall so that the crutches can be stably attached to the torso.

However, in the case of axillary crutches that provide a stable function, when the upper limb strength is insufficient or fatigue is accumulated due to prolonged use, the user of the crutches relies on the weight of the support rather than the crutches handle, and the upper body tilts forward, gradually pushing the armpit support backward. There is a problem of increasing gait instability.

This phenomenon is caused by weight-bearing, which should be done only in the lower extremities of crutches, which induces fatigue of the upper limb muscles and increases energy consumption, so that the heart rate and basal metabolism are twice as high as those of normal walking. It can be seen through many studies that this is because it is a means of daily transportation. By walking with crutches, the amount of exercise in the upper limbs is greatly increased in this way, and secondary diseases may also occur due to the use of crutches. Such secondary diseases include abrasions on the outside of the chest due to the constant movement of the armpit support and load support, nerves and arteries near the armpits. There are disability, numbness or pain caused by applying pressure to the handle for a long time, tenderness in the upper limb, contusion in the medial upper condyle, and shoulder pain. In addition, users with temporary gait impairment do not have enough upper extremity muscle strength to walk on crutches for a long period of time, so not only nerve damage in the armpit area, but also the loss of upper extremity function due to damage to the upper extremity nerve caused by weight added to the grip Also occurs frequently.

In order to prevent musculoskeletal diseases of crutches users, a method of adding a spring capable of cushioning to the lower part of the crutches or under the armpit support, and a method of allowing the armpit support to tilt have been applied. However, when measuring the muscle activity of each of the upper and lower extremities through an electromyography test of the latissimusdorsi and gastrocnemius, the products to which this method was applied show an effect compared to the standard crutches in the gastrocnemius, but show a significant difference in the lats. can not do it. Therefore, these series of improvement measures alleviate the force on the lower extremities of the crutches user and partially help the gait pattern, but as a result, the weight load of the upper extremities, which causes musculoskeletal disorders, is not sufficiently reduced.

[Prior technical literature]

-US Patent Publication No. US10,034,812 (announced on 31 January 2018)

-US Patent Publication US9,801,776 (announced on Oct. 31, 2017)

-Registered Patent Publication 10-1733420 (2017.05.08 announcement)

-Registered Patent Publication 10-1249964 (2013.04.03 announcement)

The problem to be solved by the present invention is to provide a crutches having a structure capable of stably supporting a user's armpit while being able to rotate around a center of rotation through a simple structure.

Crutches according to an embodiment of the present invention include a support leg having a plurality of guide rollers, an armpit support rotatably fastened to the support leg while being supported by the plurality of guide rollers, and a handle fastened to the support leg. Include. The armpit support has a recessed support surface for supporting the user's armpit, and is fastened to the support leg so as to perform an orbital movement around a center of rotation located above the recessed support surface. The armpit support forms a first guide surface that makes the orbital movement while contacting at least a portion of the plurality of guide rollers.

The first guide surface may be formed as a lower surface of a portion forming the recessed support surface.

The armpit support may be disposed under the first guide surface so as to face the first guide surface, and may form a second guide surface for performing the revolving motion while contacting at least a portion of the plurality of guide rollers.

Each of the first guide surface and the second guide surface may have an arc shape.

The support leg may be formed to be folded at a predetermined position in the longitudinal direction.

The support leg may include a support case, an upper shaft fastened to an upper end of the support case and to which the armpit support is fastened, and a lower shaft fastened to a lower end of the support case, and the lower shaft is It can be fastened to the support case so that it can be folded.

The crutches according to another embodiment of the present invention are fastened to the lower shaft and are fastened to the connecting member and the supporting case to selectively allow the supporting case to be folded, and the connecting member and the supporting case. It may further include a locking pin configured to be able to.

The locking pin may be configured to be recombined to the connection member and the support case so that the support case is folded with respect to the lower shaft after being removed to allow folding of the support case and maintains the folded state. have.

The support leg may include a support case, an upper shaft fastened to an upper end of the support case and to which the armpit support is fastened, and an elastic support structure installed in the support case and elastically supporting the upper shaft.

The elastic support structure includes a connection rod, a lower support member fixed to the lower end of the connection rod, an upper support member fixed to the lower end of the upper shaft and movably fastened to the connection rod, and the lower support member. It may include a spring member for elastically supporting the upper support member.

The lower support member may be configured to be adjustable in a vertical position within the support case.

The support case may include a plurality of fastening holes arranged in the vertical direction for adjusting the height of the lower support member, and the elastic support structure is inserted into any one of the plurality of fastening holes so that the lower support member It may further include a height adjustment pin fastened to the lower support member to restrain the vertical movement of the.

The support leg may include a support case, an upper shaft fastened to an upper end of the support case and to which the armpit support is fastened, and an elastic support structure installed in the support case and elastically supporting the upper shaft. The elastic support structure includes a connection rod, a lower support member fixed to the lower end of the connection rod, an upper support member fixed to the lower end of the upper shaft and movably fastened to the connection rod, and the lower support member. A spring member elastically supporting the upper support member, and a ball plunger fastened to the lower support member to guide insertion of the lower support member into the support case and to determine an insertion position.

The ball plunger may include a case fastened to the lower support member, a spring disposed in the case, and a ball elastically supported by the spring and installed so that a tip portion of the ball protrudes outside the case. A guide groove extending in a vertical direction and a seating groove formed in a plurality of positions along the vertical direction of the guide groove may be formed on the inner surface of the support case, and the ball moves along the guide groove and into the seating groove. It can be formed to be seated.

The handle may include a grip part that is rotatably installed about a rotation center axis, and an elastic member that provides an elastic support force to resist rotation of the grip part.

The elastic member may include a first elastic branch and a second elastic branch each providing an elastic restoring force when the grip part is rotated in both directions. The handle rotates together with the grip part and is fixed at a predetermined position regardless of rotation of the first and second rotational support parts and the first and second rotational support parts configured to support the first and second elastic branches, respectively. And may include a first fixing support part and a second fixing support part configured to support each of the first elastic branch and the second elastic branch when the grip part rotates in both directions.

The handle may further include a fastening shaft fixedly fastened to the support leg, and the grip part may be rotatably fastened to the fastening shaft.

The first and second fixed support portions may be provided on a support member that is fixedly fastened to the fastening shaft. The first and second fixed support portions may be disposed on both sides of the fastening shaft, and the first and second rotational support portions may be disposed on both sides of the fastening shaft.

The elastic member may further include elastic connecting portions respectively connected to the first and second elastic branches, and the first and second elastic branches may extend in opposite directions from both sides of the elastic connecting portion.

The elastic connection portion may have a shape of a coil spring, and the fastening shaft may be inserted into the elastic connection portion.

Crutches according to another embodiment of the present invention include a support leg, an armpit support rotatably fastened to the support leg, and a handle fastened to the support leg. The handle includes a grip part that is rotatably installed about a rotation center axis, and an elastic member that provides an elastic support force against rotation of the grip part.

According to the present invention, since the portion of the armpit support forming a recessed support surface for supporting the user's armpit is rotatable about the center of rotation while forming a guide surface supported by the roller of the upper shaft, the roller is provided with a simple structure. While supported, stable armpit support is possible.

1 is a perspective view of crutches according to an embodiment of the present invention.

2 is a rear perspective view of crutches according to an embodiment of the present invention.

3 is an exploded perspective view of crutches according to an embodiment of the present invention.

4 is a partially exploded perspective view of crutches according to an embodiment of the present invention.

5 is an exploded perspective view of a support case and a handle for crutches according to an embodiment of the present invention.

6 is an exploded perspective view of a lower shaft and a leg member according to an embodiment of the present invention.

7 is a cross-sectional view taken along line VII-VII of FIG. 1.

8 is a partially enlarged view of FIG. 7.

9 is a cross-sectional view taken along line IX-IX of FIG. 1.

10 is a partially enlarged view of FIG. 9.

11 is a partial cross-sectional perspective view showing the fastening of the armpit support and the upper shaft of the crutches according to an embodiment of the present invention.

12 is a partial cross-sectional view showing the fastening of the armpit support and the upper shaft of the crutches according to an embodiment of the present invention.

13 is a view showing a state in which the armpit support of FIG. 12 rotates around a rotation center.

14 is a partial cross-sectional perspective view of a handle of a crutches according to an embodiment of the present invention.

15 is an exploded perspective view of a handle of a crutches according to an embodiment of the present invention.

16 is a partial cross-sectional view of a handle of a crutches according to an embodiment of the present invention.

17 is a view showing a state in which the handle of the crutches is rotated clockwise according to an embodiment of the present invention.

18 is a view showing a state in which the handle of the crutches rotates counterclockwise according to an embodiment of the present invention.

19 is an enlarged perspective view of a connection portion between a support case of crutches and a lower shaft according to an embodiment of the present invention.

20 is a perspective view showing a state in which the locking pin of the crutches is separated according to an embodiment of the present invention.

21 is a view for explaining the folding process of the support case and the lower shaft of the crutches according to an embodiment of the present invention.

22 is a view showing a comparatively the state of the armpit support during walking of crutches and conventional crutches according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIGS. 1 and 2, the support leg 10 may extend in the vertical direction to have a long rod shape, and may have a foot 11 touching the ground at the bottom.

The armpit support 20 is fastened to the upper end of the support leg 10. 1 and 2, the armpit support 20 includes an upper surface 21 including a recessed support surface 211 having a concave curved shape. The recessed support surface 211 may be formed to allow the user's armpit to be inserted, and may have, for example, a U shape or a semicircle shape. At this time, the armpit support 20 may be fastened to the support leg 10 so as to perform a circular orbital motion centered on the rotation center RC positioned above the upper surface 21. That is, referring to FIGS. 11 and 12, the armpit support 20 may be fastened to the support leg 10 so as to perform a relatively orbital motion with respect to the support leg 10 around the rotation center RC.

A pair of lobes 22 and 23 extending downward from both side sides of the upper surface of the armpit support 20 may be provided. The lobe 22 shown in FIG. 1 may be in close contact with the inner side of the user's upper arm during use, and the lobe 23 shown in FIG. 2 may be in close contact with the user's body during use.

1 to 3, the support leg 10 may include a support case 12, an upper shaft 13, a lower shaft 14, and a leg member 15. The support case 12 may be formed of a pair of

case members

121 and 122 that are fastened to each other to form a space that penetrates vertically, and the pair of

case members

121 and 122 are formed by fastening members such as bolts. Can be fastened together. The lower end of the upper shaft 13 may be fastened to the upper end of the support case 12, and the upper end of the lower shaft 14 may be fastened to the lower end of the support case 12. The leg member 15 may be fastened to the lower end of the lower shaft 14, and the foot 11 may be fastened to the lower end of the leg member 15. The upper shaft 13, the support case 12, the lower shaft 14, and the leg member 15 may have a generally long pipe shape, and these members may be sequentially arranged in the vertical direction to form an overall long rod shape. have. On the other hand, this embodiment has a structure in which a separate leg member 15 is fastened to the lower shaft 14, but in another embodiment, the lower shaft may be extended to be supported on the floor without a separate leg member. have.

Referring to FIG. 6, the leg member 15 may be fastened to the lower shaft 14 so that the vertical position is fixed. However, the leg member 15 may be fastened to the lower connecting member 14 to be selectively fixed at a plurality of different heights so that the height of the armpit support 20 may be adjusted according to the user's height. For example, the lower shaft 14 may have a plurality of fastening holes 141 having different vertical positions and a snap button type spring clip capable of fixing the leg member 15 It is possible to adjust the height of the support leg 10 by fastening 142 to any one of the fastening holes 141. The spring clip 142 fastened to the fastening hole 151 formed in the leg member 15 is fastened to any one of the fastening holes 141 formed in the lower shaft 14, so that the lower shaft 14 relative to the leg member 15 ) Height can be adjusted.

The upper shaft 13 is elastically supported in an upward direction with respect to the support case 12. For example, referring to FIGS. 7 to 9, the upper shaft 13 may be elastically supported in an upward direction by a coil spring-shaped spring member 125. The spring member 125 is installed to be compressed by the load of the armpit support 20 transmitted through the upper shaft 13, and when a load is applied to the armpit support 20, the upper shaft 13 and the armpit support connected thereto (20) is elastically supported in the upward direction.

The upper end of the spring member 125 may be supported by the upper support member 126 fastened to the upper shaft 13 and the lower end of the spring member 125 may be supported by the lower support member 127. The lower support member 127 is fixed to the lower end of the connecting rod 128 and the upper support member 126 is fixed to the upper shaft 13 while being fastened to the upper portion of the connecting rod 128 so as to be movable in the vertical direction. I can. That is, the upper support member 126, the upper shaft 13, and the armpit support 20 may elastically move in the vertical direction through the connection rod 128 and may rotate together about the central axis of the connection rod 128. At this time, the upper support member 126 may be supported by a snap ring 1282 fastened to the connection rod 128 so as to limit maximum movement in the upward direction so as not to deviate from the upper end of the connection rod 128. The upper shaft 13 may be supported by a locking protrusion 1261 provided on the upper support member 126. On the other hand, the lower support member 127 is installed so that the vertical movement is blocked by the height adjustment pin 50 inserted into the

case members

121 and 122. For example, the lower support member 127 has a fastening groove 1271, and a fastening hole 1211 formed in the

case members

121 and 122 with the height adjustment pin 50 passing through the fastening groove 1271, By being inserted into the 1222), the vertical position of the lower support member 127 may be fixed. Accordingly, the spring member 125 elastically supports the upper support member 126 with the lower end supported by the lower support member 127, and the upper shaft 13 fastened to the upper support member 126 is also a spring It is elastically supported by the member 125. With this elastic support structure, the upper shaft 13 and the armpit support 20 fastened thereto are elastically supported. At this time, a plurality of fastening holes 1211 and 1222 are formed at a plurality of points along the vertical direction of the

case members

121 and 122, and the height adjustment pin 50 is inserted into the specific fastening holes 1211 and 1222, thereby supporting the lower part. The vertical position, that is, the height of the member 127 and the spring member 125 can be adjusted, thereby adjusting the height of the upper shaft 13 and the armpit support 20 according to the user's physical condition. The assembly of the armpit support 20, the upper shaft 13, the upper support member 126, the connecting rod 128, the lower support member 127, and the spring member 125 may be pulled out from the support case 12.

Meanwhile, referring to FIG. 7, a ball plunger 120 for determining an insertion position of the lower support member 127 into the support case 12 is provided. The ball plunger 120 may be inserted into the installation hole 1272 provided in the lower support member 127, and supported by the case 1203, the spring 1204 disposed in the case 1203, and the spring 1204. It may include a ball 1205. The ball 1205 is elastically supported by the spring 1204 so that a part of the tip is exposed outside the case 1203, and the exposed part of the ball 1205 is formed by extending vertically on the inner surface of the support case 12 It can be moved along the guide groove 1201. At this time, a seating groove 1202 having a deeper depth than the guide groove 1201 is formed at a plurality of points along the length direction of the guide groove 1201, and the ball 1205 moving along the guide groove 1201 is placed in the seating groove ( When it reaches 1202), it is pushed by the elastic force and protrudes further in the depth direction of the seating groove 1202 so that it can be stopped at the corresponding position. In this way, by allowing the user to recognize that the ball 1205 of the ball plunger 120 is seated at the position where the seating groove 1202 is formed, the lower support member 127, the connection rod 128, and the upper support member ( 126), the upper shaft 13, it is possible to adjust the insertion position of the assembly of the armpit support 20.

The armpit support 20 may be supported by a plurality of guide rollers 135 installed on the upper shaft 13. For example, a roller support 131 may be coupled to an upper end of the upper shaft 13, and a plurality of guide rollers 135 are rotatably fastened to the roller support 131. As shown in FIGS. 11 to 13, the guide rollers 135 may be installed at a total of three points (points corresponding to the vertices of an isosceles triangle), two at the top and one at the bottom, and at each point It can be provided in a pair of front and back. The armpit support 20 may include guide

surfaces

213 and 214 that support the guide roller 315. The upper guide surface 213 is supported by the upper two guide rollers 135 disposed at the vertices of the inverted triangle, and the lower guide surface 214 supports the lower guide rollers 135 disposed at the vertices of the inverted triangle. can do. In this case, the guide surfaces 213 and 214 may have an arc shape having a center of curvature at the center of rotation RC. At this time, the upper guide surface 213 may be formed as a lower surface of the portion 213 forming the recessed support surface 211 into which the armpit is inserted, and the lower guide surface 214 is the lower part 215 of the armpit support 20 ) Can be formed as a top surface. 12 shows a state in which the armpit support 20 and the upper and lower center lines coincide with the vertical central axis of the support leg 10, and FIG. 13 shows the armpit support 20 and the support leg 10 have a rotation center (RC). It shows the state of relative rotation around the center. Thereby, the armpit support 20 performs a circular orbital motion with respect to the support leg 10 and has resilience. Therefore, in a state where the armpit support 20 is clamped and fixed in the user's armpit, the support leg 10 can rotate around the rotational center RC, whereby the armpit support 20 moves the user's armpit while walking. It does not cause friction while striking, and since the line of action of the transmitted force is directed toward the center of the circle forming the armpit support 20, the armpit support 20 does not deviate from the armpit and always stably regardless of the angle of action of the support leg 10. The weight can be supported and the impact transmitted from the support leg 10 can be distributed throughout the armpit support 20.

The handle 40 is installed on the support leg 10 so that it protrudes outward from the support leg 10. The handle 40 includes a fastening shaft 41 that is fixedly fastened to the

case members

121 and 122, and a grip part 42 that is rotatably fastened to the fastening shaft 41 and is formed so that the user can hold it by hand. Can include. The fastening shaft 41 may be fastened to the

case members

121 and 122 in a horizontal direction, and for example, the fastening shaft 41 may be fastened to the end while being inserted into the

fastening holes

1213 and 1223 formed in the

case members

121 and 122. It can be fixed by the nut 411. The grip part 42 is rotatably fastened to the fastening shaft 41 fastened to the

case members

121 and 122 in a state in which rotation is blocked. For example, the grip part 42 may have a circular through hole 421, and an outer bearing 412 having a circular cross section that is fastened to the fastening shaft 41 may be inserted into the circular through hole 421. . As a result, the grip part 42 may rotate in the direction of an arrow around the rotation center axis HA shown in FIG. 14. An inner bearing 416 fixedly fastened to the fastening shaft 41 may be provided, and the inner bearing 416 may be disposed in a state in which it is in contact with the outer bearing 412.

The handle 40 includes an elastic member 43 that provides an elastic support force to resist rotation of the grip portion 42. As the grip part 42 rotates in a state supported by the elastic support force, it naturally follows the refraction of the wrist that changes at an arbitrary angle, and an appropriate support force may be provided to the wrist by torque due to the elastic restoring force of the elastic member 43.

14 and 15, the elastic member 43 includes a first elastic branch 431 and a second elastic branch 432 respectively extending in opposite directions, and the grip part 42 is not applied with an external force. In the state, the elastic force applied by the first and second

elastic branches

431 and 432 may be placed at a reference position in which a balance is achieved. The first elastic branch 431 is supported by the first rotation support 423 rotating together with the first fixing support 413 and the grip 42, and the second elastic branch 432 is a second fixing support 414 ) And the second rotation support part 424 rotating together with the grip part 42, respectively. For example, the first fixed support 413 and the second fixed support 414 may be formed as a part of the fastening shaft 41 or provided on the support member 415 fixedly coupled to the fastening shaft 41, and The first rotation support part 423 and the second rotation support part 424 may be formed as part of the grip part 42. The fixing nut 417 is fastened to the end of the fastening shaft 41, and the fixing nut 417 supports the outer surface of the support member 415 to prevent separation.

In the state of FIG. 16, the first and second

elastic branches

431 and 431 may be installed in a state in which the first rotation support part 423 and the second rotation support part 424 are pressed down, and the grip part shown in FIG. 5 42 is at a reference position in which the elastic restoring force applied by the first and second

elastic branches

431 and 432 is balanced.

The elastic member 43 may include an elastic connection portion 433 connecting the first and second

elastic branches

431 and 432. The elastic connection part 433 may have a coil spring shape into which the fastening shaft 41 is inserted, and the first and second

elastic branches

431 and 432 are straight lines extending in opposite directions from both sides of the elastic connection part 433. It can have a shape. At this time, the first rotation support part 423 and the second rotation support part 424 are disposed on both sides of the elastic connection part 433, respectively, and the first fixing support part 413 and the second fixing support part 414 are elastic connection parts 433 ) Are placed on both sides of each. The first and second

fixed support parts

413 and 414 may be implemented in the form of a support jaw on the support member 415 fixedly fastened to the fastening shaft 41.

16 shows a case where the grip part 42 is in the reference position. The reference position of the grip part 42 shown in FIG. 16 may be a position in which the grip part 42 is horizontal with a floor surface on which crutches are supported, as shown in FIG. 1. FIG. 17 shows a state in which the grip part 42 is rotated clockwise about the rotation center axis HA in the state of FIG. 16, and FIG. 18 shows the rotation center axis HA in the state of FIG. It shows the state rotated counterclockwise around ). When a force to rotate the grip part 42 clockwise is applied by the user in the state of FIG. 16, the first rotation support part 423 lifts the first elastic branch 431, and at this time, the second elastic branch 432 is While the state supported by the second fixed support part 414 is maintained, the grip part 42 rotates to the state of FIG. 17. In this process, an appropriate support force is applied to the user's wrist by torque caused by the torsional action of the elastic member 43. In this state, the grip portion 42 is applied with an elastic restoring force acting to restore the position to the position of FIG. 16 and the reference position. On the other hand, when a force to rotate the grip part 42 counterclockwise is applied by the user in the state of FIG. 16, the second rotation support part 424 lifts the second elastic branch 432, and at this time, the first elastic branch ( The grip part 431 rotates to the state of FIG. 18 while maintaining the state supported by the first fixed support part 413. Likewise, in this process, an appropriate support force is given to the user's wrist by torque caused by the torsional action of the elastic member 43. In this state, the grip portion 42 is applied with an elastic restoring force acting to restore the position to the position of FIG. 16 and the reference position.

According to an embodiment of the present invention, the support leg 10 is formed to be folded at a predetermined position in the longitudinal direction. If necessary, by folding the support leg 10, the overall length of the crutches can be reduced, so that the convenience of storage and transportation can be improved.

The connecting member 60 may be fastened to the upper end of the lower shaft 14, and the support case 12 may be fastened to the connecting member 60 so as to be foldable. 19 to 21, a connection rib 129 is provided at the lower end of the support case 12, and the connection member 60 may have a fastening groove 61 into which the connection rib 129 is inserted. . The connecting rib 129 is fastened to the connecting member 60 by a fastening pin 62 to enable a hinge action. The connection rib 129 includes a fastening hole 1291 into which the locking pin 63 is inserted, and when the support case 12 is not folded and unfolded, the fastening hole 1291 is a fastening hole formed in the connection member 60 Overlaps with (64). The locking pin 63 is installed through the fastening hole 1291 of the connecting rib 129 overlapping each other and the fastening hole 64 of the connecting member 60, so that the support case 12 for the lower shaft 14 Is blocked from folding. That is, the locking pin 63 is configured to be fastened to the connection member 60 and the support case 12 to selectively allow folding of the support case 12.

19 shows a state in which the locking pin 63 is installed so that folding is blocked, and FIG. 20 shows a state in which the locking pin 63 is removed for folding. In a state in which the locking pin 63 is removed, the support case 12 can be gradually folded as shown in FIG. 21(a), and the support case 12 is in the maximum allowable range in FIG. 21(b). The folded state is shown.

At this time, the locking pin 63 is removed to allow the support case 12 to be folded, and then the support case 12 is folded with respect to the lower shaft 14 to maintain the folded state. It is configured so that it can be reunited. To this end, the connecting rib 129 has a fastening hole 1292 and the connecting member 60 has a corresponding fastening hole 65. As shown in FIG. 19, the fastening holes 65 of the connection member 60 may be provided in a pair facing each other, and the fastening holes 1292 of the connection ribs 129 are completely supported by the support case 12. It may be formed to overlap with the fastening hole 65 of the connection member 60 in the folded state, that is, in the state of FIGS. 21B and 21C. As shown in (c) of FIG. 21, by installing the locking pin 63 through the overlapping

fastening holes

1292 and 65 in a state in which the support case 12 is completely folded, the folded state can be maintained.

Referring to Figure 22 (a), when using the crutches according to the embodiment of the present invention, since the armpit support 20 performs an orbital motion with respect to the support leg 10, the armpit support 20 is constant with respect to the ground. It can face upward while maintaining the angle, and since the handle 40 is also rotatable, it is possible to maintain a certain angle with respect to the ground so as to accurately support the user's hand. In addition, since the elastically supported upper shaft 13 of the present invention can be moved down by the load, the armpit support 20 gradually follows a gentle curve up to the middle state of FIG. 12(a) where the load is greatest. A trajectory that descends and then rises again is formed. In particular, in the x section, you can adjust the amount of compression of the built-in spring member by pulling the handle, and in the y section, you can move in space by using the elastic restoring force of the spring member that has been compressed, enabling efficient and stable walking assistance. On the other hand, as shown in (b) of FIG. 22, when the conventional crutches are used, the armpit support moves down, moves up, moves down again, and moves up again. It places a burden on the user by moving the space with only the power of

Although the embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and the embodiments of the present invention are easily changed by those of ordinary skill in the technical field to which the present invention belongs, and are recognized as equivalent. It includes all changes and modifications to the extent that it becomes available.

The present invention relates to crutches and has industrial applicability because it can be applied to articles for patients with lower limb disorders.

Claims

A support leg having a plurality of guide rollers,

An armpit support rotatably fastened to the support leg while being supported by the plurality of guide rollers, and

It includes a handle fastened to the support leg,

The armpit support has a recessed support surface for supporting the user's armpit, and is fastened to the support leg to perform an orbital movement around a center of rotation positioned above the recessed support surface,

The armpit support is in contact with at least a portion of the plurality of guide rollers and forms a first guide surface for performing the orbital movement.

Crutches.
In claim 1,

The first guide surface is a crutches comprising a lower surface of a portion forming the depression support surface.
In paragraph 2,

The armpit support is disposed under the first guide surface so as to face the first guide surface, and the crutches form a second guide surface to allow the orbital movement while contacting at least a portion of the plurality of guide rollers.
In paragraph 3,

The first guide surface and the second guide surface are each crutches having an arc shape.
In claim 1,

The support leg crutches are formed to be folded at a predetermined position in the longitudinal direction.
In claim 1,

The support leg is

Support case,

The upper shaft is fastened to the upper end of the support case and the armpit support is fastened, and

A lower shaft fastened to the lower end of the support case

Including,

The lower shaft is fastened to the support case so that it can be folded with respect to the support case.

Crutches.
In clause 6,

A connection member fastened to the lower shaft and fastened to the support case to be foldable, and

Lock pins configured to be respectively fastened to the connection member and the support case to selectively allow folding of the support case

Containing more

Crutches.
In clause 7,

The locking pin is configured to be recombined with the connection member and the support case to maintain the folded state after the support case is folded with respect to the lower shaft after being removed to allow folding of the support case.

Crutches.
In claim 1,

The support leg is

Support case,

The upper shaft is fastened to the upper end of the support case and the armpit support is fastened, and

An elastic support structure installed in the support case and elastically supporting the upper shaft

Crutches containing.
In claim 9,

The elastic support structure

Connecting rod,

A lower support member fixed to the lower end of the connecting rod,

An upper support member fixed to the lower end of the upper shaft and movably fastened to the connection rod in a vertical direction, and

A spring member elastically supporting the upper support member with respect to the lower support member

Crutches containing.
In claim 10,

The lower support member is a crutches configured so that the vertical position within the support case can be adjusted.
In claim 10,

The support case has a plurality of fastening holes arranged in the vertical direction to adjust the height of the lower support member,

The elastic support structure further comprises a height adjustment pin that is inserted into any one of the plurality of fastening holes and fastened to the lower support member to restrain the vertical movement of the lower support member.

Crutches.
In claim 1,

The support leg includes a support case, an upper shaft fastened to an upper end of the support case and to which the armpit support is fastened, and an elastic support structure installed in the support case and elastically supporting the upper shaft,

The elastic support structure includes a connection rod, a lower support member fixed to the lower end of the connection rod, an upper support member fixed to the lower end of the upper shaft and movably fastened to the connection rod, and the lower support member. A spring member elastically supporting the upper support member, and a ball plunger fastened to the lower support member to guide the insertion of the lower support member into the support case and to determine an insertion position

Crutches.
In claim 13,

The ball plunger includes a case fastened to the lower support member, a spring disposed in the case, and a ball elastically supported by the spring and installed so that a tip portion of the ball protrudes outside the case,

A guide groove extending in a vertical direction and a seating groove formed at a plurality of positions along the vertical direction of the guide groove are formed on the inner surface of the support case,

The ball is formed to be seated in the seating groove while moving along the guide groove

Crutches.
In claim 1,

The handle is

A grip part that is rotatably installed around a rotation center axis, and

An elastic member providing an elastic support force to resist rotation of the grip part

Crutches containing.
In paragraph 15,

The elastic member includes a first elastic branch and a second elastic branch each providing an elastic restoring force when the grip portion rotates in both directions,

The handle is

A first rotation support portion and a second rotation support portion that rotate together with the grip portion and configured to support the first elastic branch and the second elastic branch, respectively, and

A first fixed support part and a second fixed support part fixed at a predetermined position irrespective of rotation of the grip part and configured to support the first elastic branch and the second elastic branch respectively when the grip part rotates in both directions

Including

Crutches.
In paragraph 16,

The handle further includes a fastening shaft fixedly fastened to the support leg,

The grip part is rotatably fastened to the fastening shaft

Crutches.
In paragraph 17,

The first and second fixed support parts are provided on a support member fixedly fastened to the fastening shaft,

The first and second fixed support portions are respectively disposed on both sides of the fastening shaft,

The first and second rotation support portions are respectively disposed on both sides of the fastening shaft

Crutches.
In paragraph 18,

The elastic member further includes an elastic connection portion respectively connected to the first and second elastic branches,

The first and second elastic branches extend in opposite directions from both sides of the elastic connection part

Crutches.
In paragraph 19,

The elastic connection portion has the shape of a coil spring,

The fastening shaft is inserted into the elastic connection

Crutches.
Support Leg,

An armpit support rotatably fastened to the support leg, and

It includes a handle fastened to the support leg,

The handle is

A grip part that is rotatably installed around a rotation center axis, and

An elastic member providing an elastic support force to resist rotation of the grip part

Including

Crutches.