JP2010184107A - Walking stick - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a walking stick that enables a user to walk in an ideal posture, such that the body balance during walking is stabilized on a slope as well as on the flat ground and that walking with a regular step is made possible, where the user swinging the arms back and forth without stretching the joint uselessly from the state that the arm is bent by about 90°, with the stick held in a natural wrist condition free from a load on the joint. <P>SOLUTION: In the walking stick 1 including a grip 2, an upper shaft 3, and a lower shaft 4, the grip 2 has a bending α counterclockwise in a plane view, with the center line 8 of the upper shaft as a reference, while the lower shaft 4 has a bending β of not more than 45° clockwise in a plane view, with the center line 8 of the upper shaft as a reference, that the tip end of the lower shaft 4 is made greater than the tip end of the grip 2 in the distance from the center line 8 of the upper shaft, and that the tip end of the lower shaft 4 is bent so as to have a length L3 of not more than 15 cm from the center line 8 of the upper shaft. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a walking stick suitable for walking.

  The most common cane used for walking is a straight cane from the grip part to the shaft part. There are two purposes of using a walking stick when walking, the purpose of supporting the body to help balance and stabilize the center of gravity of the body, and the purpose of assisting the propulsive force to push the body forward by the movement of the arm It is. However, it is difficult to satisfy the above two purposes at the same time by walking using a straight cane.

  In order to achieve the two purposes of using a walking stick at the same time, it is necessary to understand two conditions. The first condition is that the tip of the shaft portion is moved to the position of the shaded portion X where the positional relationship between the right foot, the left foot and the tip grounding of the shaft portion is an isosceles triangle when walking with a cane in the left hand as shown in FIG. Is to ground. As shown in FIG. 6, a state where the positional relationship between the right foot, the left foot, and the tip grounding of the shaft portion is an isosceles triangle is most stable as the support base surface of the body center of gravity. Then, when the left foot, which is the hind leg in FIG. 6, is kicked forward and the left foot is floating in the air, it is in a standing posture state with one foot and a cane. Since the load line of the cane to be tied is close to the vertical line and the load direction is stable, the body can be stably supported by the cane.

  The second condition is an ideal form of walking with a cane. First, the most ideal form of walking is a form that walks at a normal walking stride while swinging the arm back and forth with the elbow bent at about 90 °. Miyashita Mitsumasa's "Walking Book" (2006, Book House HCD) (Non-Patent Document 1) shows the relationship between stride and height, and the normal walk stride is height x 0.37. ing. And it is important that the wrist joint has a cane grip part in a natural wrist state. As shown in FIG. 8, the natural wrist state is a joint in which the center line of the forearm and the third finger are in a straight line. This is the position of the joint that places the least burden on the wrist joint. When a straight cane is gripped in the natural wrist state, the vertical line of the line connecting the center line of the forearm and the third finger as shown by angle γ A straight cane with respect to the line exhibits an inclination of about 15 °. The wrist joint tends to be burdened by the angle of the joint when holding the grip portion of the cane, and easily causes fatigue and pain.

  The following describes walking using a straight cane. First, the length of the cane needs to be adjusted according to the individual height, and the length of the straight cane according to the individual height is about 90 ° from the state where the arm is naturally lowered in an upright posture. It has a length that allows the tip of the shaft portion to contact the ground with a grip portion in a natural wrist state. One of the purposes of using a cane when walking is to walk using a straight cane mainly for the purpose of assisting balance and stabilizing the body's center of gravity by supporting the body. Stable support of the body with a cane for use so that the tip of the shaft part is consciously grounded to the position of the shaded portion X where the positional relationship between the right foot and the left foot and the tip grounding of the shaft part is an isosceles triangle You can stabilize the body center of gravity, but bend the wrist to the thumb side unnaturally and put a burden on the wrist joint, and the elbow 90 ° so that the distance between the hand and shoulder is close Since it bends more deeply, the movement of swinging the arm back and forth during walking will be hindered, and an ideal form of walking cannot be realized.

  It is another purpose of using a walking stick when walking, and when walking with a straight walking stick mainly for the purpose of assisting the pushing force to push the body forward by the movement of the arm, Description will be made with reference to FIG. 9 showing a state in which walking is performed at a stride that normally walks with a straight cane in the state of 9 natural wrists. 9A, the positional relationship between the right foot, the left foot, and the tip grounding of the shaft portion is a position C shown in FIG. 6, and is not in a stable state as the support base surface of the body center of gravity. 9B, one leg and the cane are standing, but the cane is tilted as a whole with respect to the vertical line because the cane is grounded with the tip of the shaft facing diagonally rearward of the body. As a result, the grip portion tends to generate a rotational moment toward the ground, and the body cannot be stably supported by the cane, so that the balance cannot be assisted and the body center of gravity cannot be stabilized. In FIG. 9-c, the movement of extending the elbow that has been bent to about 90 ° by the movement of the arm begins to appear, and in FIG. 9-d, the elbow is almost fully extended, and in the movement of the arm, the movement of extending the elbow. Has appeared prominently. As shown in FIG. 7, the movement of the arm during walking using a cane is related to the position where the tip of the shaft is grounded with respect to the foot and the movement of extending the elbow. Here, the positions of A, B, and C shown in FIG. 7 coincide with the positions of A, B, and C shown in FIG. When walking with a stride that normally walks with a straight cane in a natural wrist state, the grounding position of the tip of the shaft portion of the straight cane is the position C shown in FIGS. . 7-ii to FIG. 7-ii, the right foot heel is separated from the ground, and the tangent line Y to the sole with the position of A as the stepping-back portion of the foot as a fulcrum and the shaft tip contact The movement to extend the elbow by the length of the position of the position will appear, so in walking using a linear cane, the movement to extend the elbow by the length indicated by L6 in FIG. 7-ii appears. . The tangent line Y to the sole with the position of A, which is the stepping-back portion of the shaft, as the heel point from the position A of FIG. Since the length of the shaft portion with the tip ground contact position increases, the movement to extend the elbow increases. The appearance of the movement of stretching the elbow with the movement of the arm leads to an increase in the exercise effect of the arm, but on the other hand, it will cause a burden on the arm because it will be a useless movement from the ideal form of walking. It is easy to prevent fatigue from accumulating for a long time and to induce pain in the joints and muscles around the elbow. As described above, when walking using a straight cane mainly for the purpose of assisting the propulsive force to push the body forward by the movement of the arm, the right foot, the left foot and the shaft portion shown in FIG. Since the tip of the shaft portion is not grounded to the position of the shaded portion X where the positional relationship with the tip grounding is an isosceles triangle, the body cannot be stably supported by the cane, and the body center of gravity can be stabilized. The ideal form of walking cannot be realized because the movement of extending the elbow that has been bent to about 90 ° by the movement of the arm further appears.

  As a cane that solves such a problem of a straight cane a little, for example, there is a cane described in Japanese translation of PCT publication No. 5-501964 (hereinafter referred to as Patent Document 1). FIG. 10-i illustrates the cane described in Patent Document 1. 10-i is composed of a grip portion, an upper shaft portion, and a lower shaft portion, and the grip portion has an angle of 15 with respect to the upper shaft portion in order to reduce the burden on the wrist. The lower shaft portion is bent forward with respect to the upper shaft portion. However, the reason why the lower shaft portion is bent in the forward direction with respect to the upper shaft portion is that the shaft line is a foot line, as described in lines 14 to 16 at the upper left part of page 3 of Patent Document 1. Therefore, it is merely bent in the forward direction as an aesthetic appearance, and is not bent in consideration of the shape of a cane suitable for walking.

  FIG. 10-ii shows a state where the angle of the grip portion of the cane described in Patent Document 1 shown in FIG. 10-i is 15 °. As can be seen from FIG. 10-ii, the cane of Patent Document 1 has a line parallel to the upper shaft portion passing through the tip of the grip portion and the lower shaft even when the grip portion is in the most upright state with respect to the upper shaft portion. The position of the tip of the lower shaft part is the tip of the grip part when the part where the index finger comes into contact with the grip part naturally when walking is regarded as the tip of the grip part. It is located on a line parallel to the upper shaft portion passing through the upper shaft portion side or the tip of the grip portion with respect to a line parallel to the upper shaft portion passing through. A stone bump is provided at the tip of the lower shaft portion, and FIG. 10-iii shows the shape of the stone bump. The shape of the stone bump is flat at the bottom and slightly rounded at the front and rear.

JP-T-5-501964

“Walking Book”, Mitsumasa Miyashita, Book House H.D., 2006, p. 44, Table 6-1

  The walking using the cane of patent document 1 is demonstrated below. First, the length of the cane needs to be adjusted according to the individual height, and the length of the cane of Patent Document 1 corresponding to the individual height is about 90 degrees from the state where the arm is naturally lowered in an upright posture. The length is such that the tip of the lower shaft part comes into contact with the ground while holding the grip part in a natural wrist state bent to °°. FIG. 11 shows a state where walking is performed with a stride that is normally walked with the cane of Patent Document 1 in a natural wrist state. The ground contact position of the tip of the lower shaft portion in FIG. 11-a is an oblique line in which the positional relationship between the right foot, the left foot, and the tip ground contact of the shaft portion when walking with a cane in the left hand shown in FIG. Since the tip of the lower shaft part naturally contacts the position B shown in the part X, the purpose of stabilizing the body center of gravity by assisting the balance is satisfied, so that stable walking of the body center of gravity is performed. I can do it. In the case of FIG. 11-b, the body is supported by the cane and one leg, but the body can be stably supported by the cane, so that the stability of the body center of gravity can be obtained.

  However, in the case of FIGS. 11A to 11C, the elbow is bent at about 90 °, but in the case of FIG. 11D, the elbow is bent from about 90 ° to move beyond it. Appear. The position of grounding the tip of the lower shaft portion of the cane in Patent Document 1 is the position B because of the relationship between the position of grounding the tip of the shaft portion and the movement of extending the elbow with respect to the foot shown in FIG. When the heel of the right foot is separated from the ground when FIG. 7-i is changed to FIG. 7-ii, the tangent line Y to the sole and the lower shaft with the position of A which is the stepped-back portion of the foot as a fulcrum Since the movement of extending the elbow by the length with the position B of the tip grounding of the part appears, walking using the cane of Patent Document 1 extends the elbow by the length indicated by L7 in FIG. 7-ii. Movement appears.

  In addition, as shown in FIG. 12-e, the use of the cane of Patent Document 1 on the uphill slope, the movement of extending the elbow of the arm holding the cane is more noticeable than when walking on a flat ground. Yes. On the slope, the amount that the heel moves away from the ground increases as much as there is an inclination, so the movement of extending the elbow from about 90 ° beyond that will appear more than when walking on flat ground. . In addition, because the slope needs to be pushed up against gravity by the amount of inclination, the burden on the arm is greater than walking on flat ground, accumulating fatigue and pain in the muscles and joints around the elbow It is easy to induce.

  Further, as shown in FIG. 12-f, when the cane of Patent Document 1 is used on the downhill, there is a sense that the body is likely to fall forward when going down the slope. Ground the toes near the toes or in front of the toes. Therefore, when using the cane of Patent Document 1 on the downhill slope, the wrist is consciously bent unnaturally to the thumb side so that the tip of the lower shaft portion can be ground near the toes or in front of the toes. Therefore, there is a drawback in operation such as causing a burden on the wrist joint and inducing pain to the wrist and a decrease in grip strength. Alternatively, when the cane of Patent Document 1 is used when going down a hill without consciously operating the cane, the stride becomes narrower and every step becomes a gait.

  And the state of the stone bump according to the angle which the lower shaft part of the cane of patent document 1 and the ground make in FIG. 13 is shown. 13A to 13D correspond to the states of FIGS. 11A to 11D, and FIG. 13E corresponds to the state of FIG. 12E. In particular, in the case of FIG. 13-e, the angle between the ground and the lower shaft portion becomes sharper as the slope of the slope becomes steeper while the cane of Patent Document 1 is used when going up the slope. However, in the shape of the stone bump provided at the tip of the lower shaft portion of the cane of Patent Document 1, the ground contact surface between the stone bump and the ground becomes narrow as the slope of the uphill slope becomes steep, and the arm is easily slid from the ground and is efficiently propelled. I cannot get the action.

  In the present invention, in order to solve these problems, the grounding position of the tip of the shaft portion is isosceles according to the positional relationship between the right foot, the left foot and the tip grounding of the shaft portion shown in FIG. The position of A that corresponds to the stepped-back portion of the foot due to the movement of extending the elbow and the position of grounding the tip of the shaft portion shown in FIG. 7, that is, the position of A in the hatched portion X shown in FIG. Since the body naturally touches the position, the body's center of gravity is stable when walking on flat ground and slopes, and the elbow is bent to about 90 ° with the cane in a natural wrist state with no burden on the wrist joint. The purpose is to develop a walking cane that can walk in the ideal form of walking with normal stride while swinging the arm back and forth without making unnecessary movements that extend the elbow more than that. .

  The walking cane of the present invention is a cane that includes a grip portion, an upper shaft portion, and a lower shaft portion. The grip portion is bent in a counterclockwise direction in plan view with respect to the center line of the upper shaft portion, and the lower shaft The portion is 45 ° or less clockwise in a plan view with respect to the center line of the upper shaft portion, and the tip of the lower shaft portion is longer than the tip of the grip portion from the center line of the upper shaft portion, and The tip of the lower shaft portion is bent to a length of 15 cm or less from the center line of the upper shaft portion.

  Further, the lower shaft portion of the walking cane of the present invention is provided with a stone bump at the tip, and the stone bump has a bulge on the opposite side of the center line of the upper shaft portion with respect to the center line of the lower shaft portion. Further, the stone bump is provided with means for improving the flexibility of the bulge portion, and the bottom surface of the stone bump is about 90 ° with respect to the center line of the upper shaft portion.

  In the present invention, the lower shaft portion is bent at 45 ° or less in a clockwise direction in plan view with respect to the center line of the upper shaft portion. The walking is performed using a cane having a bend angle of 45 ° or more at the shaft portion. This is because the component force in the direction in which the shaft portion bends is larger than the component force that supports the body weight, which is inappropriate as the bending angle provided in the shaft portion.

  In addition, the length of the tip of the lower shaft part from the center of the upper shaft part is larger than the tip of the grip part when walking with a stride that normally walks with a cane in the state of a natural wrist, The right foot during walking to the position A corresponding to the stepped-back portion of the foot due to the movement of extending the elbow and the position where the tip of the shaft portion is grounded as shown in FIG. 7 and when walking with a walking stick with the left hand shown in FIG. This is because the tip of the lower shaft portion can be naturally grounded to the position A in the shaded portion X where the positional relationship between the left foot and the tip grounding of the shaft portion is an isosceles triangle.

  Further, the tip of the lower shaft portion is 15 cm or less from the center line of the upper shaft portion. The reason why the tip of the lower shaft portion is 15 cm or more from the center line of the upper shaft portion is shown in FIG. The stability of the center of gravity of the body during walking is poor because the tip of the lower shaft is grounded to the position D due to the positional relationship between the right foot, the left foot, and the tip grounding of the shaft when walking with a cane in the left hand. Because it becomes.

  Further, the stone bump has a bulge shape on the opposite side of the center line of the upper shaft portion with respect to the center line of the lower shaft portion, and the stone bump is provided with means for improving the flexibility of the bulge portion. The bottom surface is about 90 ° with respect to the center line of the upper shaft portion. The ground surface can be grounded immediately after the stone bump touches the ground by walking on the flat ground, and the lower shaft portion on the flat ground and slopes. Even if the angle formed by the ground changes, the bulge part of the stone bump deforms so that the bottom surface of the stone bump can be widely grounded to the ground, so the efficiency of the arm with the cane by obtaining sufficient friction between the stone bump and the ground This is because it makes possible a general propulsion action.

  The present invention relates to a cane composed of a grip portion, an upper shaft portion, and a lower shaft portion, wherein the grip portion is bent counterclockwise in a plan view with respect to the center line of the upper shaft portion, and the lower shaft portion is an upper shaft portion The tip of the lower shaft portion is 45 ° or less clockwise in plan view with respect to the center line of the lower shaft portion, and the tip of the lower shaft portion is longer than the tip of the grip portion from the center line of the upper shaft portion. Is bent to a length of 15cm or less from the center line of the upper shaft part, so when walking with a walking stride while holding a cane in a natural wrist state with no burden on the wrist joint, the lower shaft part The ground contact position of the tip is an isosceles triangle in which the positional relationship between the right foot, the left foot, and the shaft ground contact of the shaft portion, and the elbow of the arm holding the cane is extended from a state bent to about 90 °. By naturally grounding to the grounding position of the tip of the shaft part that does not appear, it is possible to walk stably at the center of gravity of the body, and even if you use a cane on the flat ground and up and down the slope, it is a natural wrist state The arm can be swung back and forth while keeping the elbow bent at approximately 90 °, thus maintaining the most ideal walking form while minimizing the burden on the wrist and elbow of the arm holding the cane. It became possible to do.

  Furthermore, the present invention provides a stone bump provided at the tip of the lower shaft portion, which has a bulge shape on the opposite side of the center line of the upper shaft portion with respect to the center line of the lower shaft portion, and the stone bump is a bent portion of the bulge portion. Means for improving the performance, and the bottom surface of the stone bump is about 90 ° with respect to the center line of the upper shaft portion, so that the entire bottom surface can be grounded immediately after the stone bump contacts the ground, and When walking, even if the angle between the lower shaft and the ground changes on flat ground and slopes, the bulge part of the stone bump is deformed, so that sufficient friction can be obtained by grounding the stone bump bottom to the ground widely It became possible to efficiently obtain the propulsive force to push the body forward with the arm holding the cane without slipping from the ground even on flat ground and slopes.

  For this reason, the walking speed is faster than walking using a conventional walking stick.

  In addition, since the walking stick of the present invention can efficiently move the arm when used for walking, the burden on the entire arm is the least, and the tip of the lower shaft part naturally contacts the position where the body center of gravity is stable. In addition, it has become a cane of the optimum shape as a cane used for walking by middle-aged and elderly people who tend to have weak legs and legs.

The figure which shows the cane of this invention. The figure which shows the stone tip of this invention. The figure which shows a mode that it walks by the stride which walks normally with the walking stick of this invention. The figure which shows a mode that it goes up and down the slope with the cane of this invention. The figure which shows the change according to the angle which the lower shaft part of the stone bump of this invention and the ground make. The figure which shows the positional relationship between the right leg | foot, the left leg | foot, and the front-end | tip grounding of a shaft part at the time of walking with a cane with the left hand. The figure which shows the relationship between the position which earth | grounds the front-end | tip of a shaft part with respect to a leg | foot part, and the motion which extends an elbow. The figure which shows the state of the natural wrist with the least burden on the joint of a wrist. The figure which shows a mode that it walks by the stride which normally walks with a linear cane in the state of a natural wrist. The figure which shows the cane of patent document 1. FIG. The figure which shows a mode that it walks by the stride which walks normally with the cane of patent document 1 in the state of a natural wrist. The figure which shows a mode that it goes up and down the slope with the cane of patent document 1. FIG. The figure which shows the state of the stone bump according to the angle which the lower shaft part of the cane of patent document 1 and the ground comprise.

Hereinafter, the present invention will be described in detail with reference to FIG.
FIG. 1-i shows a cane of the present invention, and a walking cane 1 of the present invention comprises a grip part 2, an upper shaft part 3 and a lower shaft part 4. The grip portion 2 is 13 cm long and bent 15 ° counterclockwise in plan view with respect to the center line 8 of the upper shaft portion, and the lower shaft portion 4 is 37 cm long and viewed in plan view with respect to the center line 8 of the upper shaft portion. The structure is bent by 15 ° in the clockwise direction. FIG. 1-ii shows the positional relationship between the tip of the grip portion of the cane of the present invention and the tip of the lower shaft portion, and the index finger when the grip portion is naturally held by hand when walking is brought into contact. When viewing the part as the tip of the grip part, the tip of the lower shaft part does not overlap with the line parallel to the upper shaft part passing through the tip of the grip part, and the line parallel to the upper shaft part passing through the tip of the grip part is used as a reference. It is located on the opposite side of the center line of the upper shaft part. Therefore, L3 shown in FIG. 1-i is always larger than L4.

  The length L1 of the grip part 2 is optimally 13 cm, but if it is in the range of 10 to 15 cm, it is suitable as a grip part. Further, the grip portion 2 bends an angle α in the counterclockwise direction in plan view with respect to the center line 8 of the upper shaft portion. If the angle α is optimally 15 ° and is in the range of 10 to 20 °, the wrist joint is natural. It is suitable as an angle for maintaining the state. The grip part 2 is a part that the user holds by hand, and is mounted and fixed on the upper side of the upper shaft part 3. The grip portion 2 preferably has a shape adapted to the state of being gripped by the palm, or a shape that can easily recognize the front-rear direction of the cane when gripped by the palm, and is a material excellent in workability, such as synthetic plastic or synthetic rubber Formed with.

  The length L2 of the lower shaft portion 4 is appropriately in the range of 32 to 40 cm, and 37 cm is optimal. Further, the lower shaft portion 4 bends an angle β clockwise in a plan view with respect to the center line 8 of the upper shaft portion, and the angle β is suitably 45 ° or less, preferably in the range of 12.5 to 17.5 °, preferably 15 °. Is the best. Here, the lower shaft portion 4 is bent at 45 ° or less clockwise in a plan view with respect to the center line 8 of the upper shaft portion. However, the straight line connecting the start point of the lower shaft portion and the upper shaft portion is bent. The angle formed by the center line 8 is the bending angle. For this reason, the lower shaft portion 4 is preferably linear, but may be curved. The distal end of the lower shaft portion 4 is suitably 15 cm or less in length L3 from the center line 8 of the upper shaft portion, and the range of 7 to 12 cm is optimal, and when the walking stick is used for walking, the lower shaft portion 4 The grounding position of the tip of the body can be grounded naturally to the position where the body center of gravity is most stable and the useless movement of extending the elbow does not appear. Since the tip of the lower shaft portion 4 is a part in contact with the ground, a stone protrusion 5 is attached.

  The shaft constituting the cane is formed of a hollow pipe, and the thin pipe 3b is inserted and connected to the thick pipe 3a so that it can be protruded and retracted by the pipe insertion connecting portion 6 of the upper shaft portion 3. In the upper shaft portion 3, a thick pipe 3a and a thin pipe 3b have a two-stage structure, and a ratchet expansion / contraction adjustment function 7 is provided for the purpose of adjusting the length of the cane in accordance with the body shape.

  The height from the ground to the elbow is 85 cm, the height is 180 cm, the height from the ground to the elbow is 110 cm, and there is a proportional relationship between the height and the height from the ground to the elbow. The total length of the shaft constituting the cane is from the ground to the boundary between the grip portion 2 and the upper shaft portion 3 with the tip of the lower shaft portion grounded to the ground and the center line 8 of the upper shaft portion perpendicular to the ground. The upper shaft portion 3 and the lower shaft portion 4 are configured such that the length L5 is 85 cm when the height is 140 cm and 110 cm when the height is 180 cm. The expansion / contraction adjustment function 7 can deal with body shapes of 140 to 180 cm tall by adjusting the expansion and contraction by providing a 25 cm expansion / contraction width with a pitch width of 2.5 cm in a ratchet system.

  The shaft constituting the cane is preferably formed of a material that is light, strong and resistant to rust, and is formed of, for example, aluminum, steel, titanium, carbon, or an alloy thereof. The pitch width of the ratchet method which is the cane length expansion / contraction adjustment function 7 is set to an appropriate pitch width such as 2.5 cm or 3 cm in consideration of the strength of the material of the shaft.

  A stone bump 5 is provided at the tip of the lower shaft portion 4, and FIG. 2 shows the stone bump of the present invention. As shown in the vertical section 5a of the stone protrusion, the stone protrusion 5 has a bulge shape on the opposite side of the center line 8 of the upper shaft portion with respect to the center line 9 of the lower shaft portion, and the bulge portion of the stone protrusion 5 is bent. Means are provided to improve the performance. Means for improving the flexibility provided at the bulge portion of the stone protrusion 5 is that the elastic portion of the lower shaft portion 4 is cut obliquely so as to use the elasticity of the stone protrusion 5 more effectively. It is to increase the volume, to provide a hollow portion 13 in the bulge portion of the stone protrusion 5, or to provide a groove 14 at the bottom of the stone protrusion. A wear prevention metal fitting 15 is mounted between the stone protrusion 5 and the tip of the lower shaft portion 4, and the wear prevention metal fitting 15 is attached to distribute the pressure from the tip of the lower shaft portion 4 to the stone protrusion 5. Yes. As shown by the angle R, the bottom surface 5b of the stone bump is about 90 ° with respect to the center line 8 of the upper shaft portion. The stone bump 5 is required to have anti-slip, shock-absorbing and wear-resistant functions, and is made of a moderately flexible material having frictional resistance, for example, synthetic rubber or elastomer.

  FIG. 5 shows changes according to the angle formed by the lower shaft portion 4 of the stone bump 5 and the ground. 5A to 5D correspond to the states of FIGS. 3A to 3D, and FIG. 5E corresponds to the state of FIG. Since the stone bump 5 is provided with means for improving the flexibility of the bulge portion, even if the angle formed by the lower shaft portion 4 and the ground changes as shown in FIG. Therefore, a frictional force can be efficiently obtained between the stone bump 5 and the ground.

  FIG. 3 shows a state where the walking cane is normally walked using the walking cane 1 of the present invention, and FIG. 4 shows a state where the walking cane 1 is used for going up and down the hill using the walking cane 1 of the present invention. . First, the length of the cane needs to be adjusted according to the individual height, and the length of the cane according to the individual height is about 90 ° from the state where the arm is naturally lowered in an upright posture. The grip part 2 is held in a natural wrist state with the grip part 2 bent in the counterclockwise direction in plan view with the center line 8 of the upper shaft part as a reference, and the tip of the lower shaft part 4 is The length of the shaft is adjusted by the expansion / contraction adjustment function 7 so that the length of the shaft contacts the ground. FIG. 3 shows a horizontal flat surface, and FIG. 4 shows a slope. When the walking cane 1 of the present invention is used, it has a grip portion in a natural wrist state on any road surface and an arm is an elbow. Can be swung back and forth while maintaining at 90 °. Therefore, walking using the walking cane 1 of the present invention has a body center of gravity that is stable during walking even on flat ground and slopes, and has a cane in the state of a natural wrist with no burden on the wrist joint. It is possible to walk in the ideal form of walking with normal stride while swinging the arm back and forth without the useless movement of extending the joint from the elbow state bent to °.

  The positional relationship between the right foot, the left foot, and the tip grounding of the shaft portion when walking with a cane in the left hand shown in FIG. The movement of the foot when the stride is wide is mainly that the movement of kicking the foot backward appears more strongly, and there is no significant change in the ground contact state of the foot swinging forward. Therefore, even if the stride is widened by walking using the walking cane 1 of the present invention, the positional relationship between the right foot, the left foot, and the tip grounding of the shaft portion shown in FIG. The relationship between the isosceles triangles remains the same.

  The embodiments described above are preferred specific examples of the present invention, and are not limited to these aspects.

DESCRIPTION OF SYMBOLS 1 ... Walking stick 2 ... Grip part 3 ... Upper shaft part 3a ... Thick pipe 3b ... Thin pipe 4 ... Lower shaft part 5 ... Stone bump 5a ... Stone bump Vertical section 5b ... Bottom surface of stone bump 6 ... Pipe insertion / connection part 7 ... Expansion / contraction adjustment function 8 ... Center line of upper shaft part 9 ... Center line 10 of lower shaft part Tip 11 of the cane grip portion of the present invention ... Line 12 parallel to the upper shaft portion passing through the tip of the grip portion of the present invention ... Tip 13 of the lower shaft portion of the cane of the present invention Part 14: Stone protrusion bottom groove 15 ... Wear prevention metal fitting 16 ... Horizontal flat ground 17 ... Horizontal line 18 ... Right foot 19 ... Left foot 20 ... Forearm center line and third Line 21 connecting fingers ... A line 22 perpendicular to the line connecting the center line of the forearm and the third finger 22 · Linear cane 23 ··· Grip portion 24 of the cane of Patent Literature 1 · Upper shaft portion 25 of the cane of Patent Literature 1 · Lower shaft portion 26 of the cane of Patent Literature 1 · · · Patent Literature 1 The cane protrusion 27 of the cane. The tip 28 of the grip part of the cane of Patent Document 1. The line 29 parallel to the upper shaft part passing through the tip of the grip part of the cane of Patent Document 1 is the cane of Patent Document 1. The tip L1 of the lower shaft part of the lower part L1 ... the length L2 of the grip part ... the length L3 of the lower shaft part ... the length L4 from the center line of the upper shaft part to the tip of the lower shaft part ... the upper part Length L5 from the center line of the shaft part to the tip of the grip part ... The grip part and the upper shaft from the ground with the tip of the lower shaft part grounded to the ground and the center line of the upper shaft part perpendicular to the ground Length L6 to the boundary of the part ... A straight cane Length L7 for extending the elbow during walking used: Length for extending the elbow during walking using the cane of Patent Document 1 A: Natural wrist state of the cane of the present invention The position where the tip of the lower shaft part touches down when walking with a normal walking stride B. When walking with a walking stride normally holding the cane of Patent Document 1 in the state of a natural wrist The position where the tip of the lower shaft contacts the ground C ... The position where the tip of the shaft contacts the ground when walking with a stride that normally walks with a straight cane in the state of a natural wrist D: Lower shaft The position where the tip of the lower shaft contacts the ground when the length of the tip from the center line of the upper shaft is 15 cm or more X ... Right foot, left foot and shaft when walking with a cane in the left hand of The contact position of the tip of the shaft where the positional relationship with the end contact is an isosceles triangle Y: Tangent line to the sole with the position of A as the stepping-back part of the foot α: The grip is at the top Angle to bend with respect to the center line of the shaft part β ・ ・ ・ An angle at which the lower shaft part bends with respect to the center line of the upper shaft part γ ・ ・ ・ A line perpendicular to the line connecting the center line of the forearm and the third finger The angle formed by the straight cane and R: The angle formed by the center line of the upper shaft and the bottom of the bump

Claims (2)

  In a cane composed of a grip part, an upper shaft part, and a lower shaft part, the grip part is bent counterclockwise in plan view with respect to the center line of the upper shaft part, and the lower shaft part has a center line of the upper shaft part. As a reference, it is 45 ° or less clockwise in plan view, and the tip of the lower shaft portion is longer than the tip of the grip portion from the center line of the upper shaft portion, and the tip of the lower shaft portion is the upper shaft portion. A walking cane characterized by being bent to a length of 15 cm or less from the center line. The lower shaft part is provided with a stone bump at the tip, the stone bump has a bulge shape on the opposite side of the center line of the upper shaft portion with respect to the center line of the lower shaft portion, and the bulge portion of the stone bump has good flexibility 2. The walking cane according to claim 1, wherein a means for doing so is provided, and a bottom surface of the stone protrusion is about 90 degrees with respect to a center line of the upper shaft portion.

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