JP2007282986A - Walking stick - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a walking stick internally fixing a receiving member without damaging the whole design of the walking stick, and easily changed in design. <P>SOLUTION: The walking stick includes a cylindrical stick body 2 provided with a handle 4 at the upper end, a cushion unit 3 included in the lower part of the stick body 2 in a state where the lower part projects from the lower end of the stick body 2, a ferrule 5 provided at the lower end of the cushion unit 3. The cushion unit 3 has an inner pipe 41 fixed on the inner peripheral surface of the stick body 2, a receiving member 42 housed in the inner pipe 41, a movable shaft 45 provided with the ferrule 5 at the lower end and slidably mounted on the stick body 2, a coil spring 43 interposed between the receiving member 42 and the movable shaft 45. The receiving member 42 is integrally caulked with the inner pipe 41 from the outside to be fixed to the inner pipe 41. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a walking stick that is provided with a cushion unit and absorbs an impact from the ground during use.

Conventionally, as this type of walking stick, a spring having a built-in spring between a cylindrical walking stick main body and a handle is known. In this case, one end of the spring is in contact with the mounting portion of the handle, the other end is in contact with a receiving member provided inside the stick body, and the receiving member caulks the receiving member together with the stick body from the outside. This is fixed to the main body of the stick (see Patent Document 1).
Japanese Patent Laid-Open No. 10-313921

  However, in the above-mentioned walking stick, since the receiving member is caulked together with the walking stick body, there is a problem that a part of the walking stick body is depressed and the design of the walking stick is deteriorated. In addition, since the receiving member is caulked and fixed together with the stick body, resin-based materials cannot be used, the material used is limited, and the receiving member is directly fixed to the stick body, making it difficult to change the design. There was a problem of being.

  An object of the present invention is to provide a walking stick in which a receiving member can be fixed and the design can be easily changed without deteriorating the design of the entire walking stick.

  The stick of the present invention has a cylindrical stick main body with a handle at the upper end, a cushion unit built in the lower part of the stick main body with the lower part protruding from the lower end of the stick main body, and a lower end of the cushion unit. The cushion unit is provided with an internal pipe fixed to the inner peripheral surface of the stick body, a receiving member accommodated in the internal pipe, and a stone protrusion at the lower end, and is slidable on the stick body. And a coil spring interposed between the receiving member and the movable shaft, and the receiving member is caulked together from the outside together with the internal pipe and fixed to the internal pipe. Features.

  According to this configuration, when the walking stick is used, the impact from the ground is absorbed by the coil spring via the movable shaft, and the burden on the user's shoulder and the like can be reduced. In addition, since the receiving member is covered and fixed to the internal pipe while being covered with the stick body, the recessed portion generated on the surface of the stick body by caulking is not visually recognized from the outside, and the design property is improved. There is no deterioration. In addition, since the receiving member is caulked and fixed to the internal pipe instead of the stick body, the material of the stick body is not limited, and the internal pipe and the stick body are both cylindrical. The degree of freedom of the fixing method between the pipe and the stick body increases, and the design change becomes easy.

  In this case, it is preferable that a plurality of annular grooves that are concentric circles are formed on the ground contact surface of the stone bump.

  According to this structure, the adhesiveness with respect to the ground is increased by the plurality of annular grooves, and when the walking stick is pushed against the ground, it is possible to prevent the stone bump from slipping. Further, since the annular groove is formed concentrically, the adhesion of the grounding surface does not differ depending on the grounding direction of the stone bump such as uphill or downhill.

  In this case, the cushion unit further includes an insertion rod that loosely inserts and holds the coil spring and is slidably inserted into a through hole formed in the shaft center of the movable shaft, and one end of the insertion rod is integrally formed. It is preferable that a retaining member that is fixed to the receiving member by caulking and that prevents the movable shaft from coming off against the coil spring is provided at the other end.

  According to this configuration, the internal pipe, the receiving member, the movable shaft, the coil spring, and the insertion rod can be unitized, and the assemblability of the stick can be improved. Moreover, since the outer peripheral surface of the movable shaft is guided by the stick body and the inner peripheral surface is guided by the insertion rod, there is no blurring when the movable shaft slides. There is no sense of incongruity. If the retaining member is made of a screw, the spring stroke of the coil spring can be freely adjusted.

  In this case, the stick body includes an upper pipe provided with a handle on the upper end, an inner pipe fixed to the inner peripheral surface, a lower pipe nested in the upper pipe, and an upper pipe and a lower pipe. An intervening length adjusting mechanism for adjusting the length of the nesting state, and the inner pipe with respect to the lower pipe overlaps the upper pipe and the lower pipe adjusted to the maximum length by the length adjusting mechanism. It is preferable that it is located at the portion and is fixed by the penetrating pin.

  According to this configuration, even when the stick main body and the internal pipe are fixed by pin joining, the joint is not exposed to the outside because the joint is covered by the overlap portion of the upper pipe and the lower pipe. The design of the walking stick body does not deteriorate.

  Hereinafter, a stick according to an embodiment of the present invention will be described with reference to the accompanying drawings. The walking stick supports the weight of the user in walking, hiking, mountain climbing, skiing stock, etc., and reduces the burden on the user's legs and legs, while the built-in cushion unit reduces the burden on the shoulder due to impact load. To do.

  As shown in FIG. 1, the walking stick 1 is built into the lower part of the walking stick body 2 in a state of protruding from the lower end of the walking stick body 2 and a handle 4 provided at the upper end of the walking stick body 2. The cushion unit 3 and the stone protrusion 5 attached to the lower end of the cushion unit 3 are provided.

  The handle 4 is made of wood, resin, or the like, or is covered with a non-slip material such as rubber or urethane. The handle 4 is attached to the upper end of the stick body 2 and the handle. It has a grip part 12 extending from the upper part of the mounting part 11 in a substantially horizontal direction. The grip portion 12 extends so that the front portion is long and the rear portion is short with the handle mounting portion 11 as a boundary. Moreover, the grip part 12 is formed in a gentle wave shape in the extending direction and is formed so as to fit the palm of the user. In addition, although the grip part 12 of embodiment is right-handed and left-handed combined use, when attaching a feeling of fitting, you may form separately.

  The walking stick main body 2 includes a cylindrical upper pipe 21 having an upper end mounted on the handle mounting portion 11 and a cylindrical lower pipe that is nested in engagement with the inner peripheral surface of the upper pipe 21 and includes a cushion unit 3 in the lower portion. And a pipe 22. The upper pipe 21 and the lower pipe 22 are made of an aluminum pipe whose outer peripheral surface is finished in a predetermined color or pattern, and have strength based on safety standards.

  A plurality (six in this embodiment) of adjustment holes 24 are formed at equal pitches in the vertical direction on the lower peripheral surface of the upper pipe 21, and the upper peripheral surface of the lower pipe 22 appears and disappears in each adjustment hole. A fitting pin 23 that is freely fitted is provided. The insertion pin 23 is urged in the protruding direction by an extrusion spring (not shown). By selectively fitting the insertion pin 23 and the plurality of adjustment holes 24, the upper pipe 21 and the lower pipe 22 are connected to each other. A length adjusting mechanism that can adjust the length in stages is configured. When the user adjusts the length of the stick 1, the length of the stick 1 is adjusted by moving the upper pipe 21 up and down relative to the lower pipe 22 while pushing the insertion pin 23 with a tool or the like. It has become.

  A pair of pin holes 51 are formed below the fitting pins 23 so as to penetrate the upper end of the lower pipe 22 in the radial direction. This pin hole 51 is a part for implanting a penetration pin 52 for fixing an inner pipe 41 to be described later to the lower pipe 22. When the walking stick 1 is adjusted to the maximum length, the pin hole 51 is formed between the upper pipe 21 and the lower pipe 22. It is the structure located in an overlap part. That is, the pin hole 51 (penetration pin 52) is always covered with the upper pipe 21 (see FIG. 2).

  The stone bump 5 is made of hard rubber or the like, and has a columnar grounding portion 31 that contacts the ground, and a stone bump mounting portion 35 that is connected to the grounding portion 31 and is detachably attached to the lower end portion of the cushion unit 3. ing. A mounting recess 32 having a circular opening at the upper end is formed in the axial center portion of the stone bump mounting portion 35, and the outer peripheral surface is formed in a tapered shape extending downward. A flat washer 33 is mounted on the bottom surface of the mounting recess 32, and the lower end of the mounted cushion unit 3 abuts against the flat washer 33. The flat washer 33 is inserted and set in an insert format when the stone protrusion 5 is formed. Therefore, the flat washer 33 does not fall off from the stone bump 5 as a replacement part. The grounding portion 31 has a grounding surface on the bottom surface, and two concentric annular grooves 34 are formed on the grounding surface. The two annular grooves 34 slightly deform the ground contact surface in accordance with the angle with respect to the ground, thereby increasing the adhesion (slip is suppressed) and preventing the stick 5 from slipping when the walking stick 1 is pushed against the ground. can do. Further, since the annular groove 34 is formed concentrically, the contact surface does not have different adhesion on an uphill or downhill.

  The cushion unit 3 includes an internal pipe 41 fixed to the inner peripheral surface of the walking stick main body 2 (lower pipe 22), a receiving member 42 fitted and fixed to a lower end portion of the internal pipe 41, and an upper end portion of the receiving member 42. An insertion rod 44 fixed to the shaft center, a coil spring 43 which is loosely inserted so as to be wound around the insertion rod 44 and is in contact with the member 42, and a through hole formed in the shaft center of the insertion rod 44 slide. A movable shaft 45 that is freely mounted and abutted with the other end of the coil spring 43, and a fastening nut 46 that is screwed to the lower end portion of the insertion rod 44 to prevent the movable shaft 45 from being detached are provided.

  The movable shaft 45 is formed in a cylindrical shape with Duracon resin, and an outer peripheral surface thereof is connected to a main body slide portion slidably inscribed in the lower pipe 22 and a lower side of the main body slide portion, and is slightly larger in diameter than the main body slide portion And a stone bump mounting portion. The stone bump mounting portion has a shape complementary to the mounting recess 32 of the stone bump 5 to which the stone bump mounting portion is mounted (the same diameter and the same length), and the step portion that forms the boundary between the slide main body and the stone bump mounting portion is formed on the coil spring 43. On the contrary, when the maximum load is applied to the stick 1, it hits the lower end of the lower pipe 22 and functions as a stopper. Thus, the maximum stroke amount of the stick 1 is defined by the relative positional relationship between the stepped portion and the lower end of the lower pipe 22. The through-hole formed in the movable shaft 45 is formed in a rod through-hole 54 through which the insertion rod 44 is inserted, and a counterbore-hole shape formed in the lower end portion of the movable shaft 45 and connected to the rod through-hole 54 to receive the fastening nut 46. And a nut through hole 55.

  The insertion rod 44 is made of a bar material such as brass or stainless steel, and an upper end screw portion 54 and a lower end screw portion 57 are formed at both upper and lower ends thereof. The upper end screw portion 54 is fitted and fixed in an insertion hole 53 formed in the receiving member 42, and the lower end screw portion 57 is screwed into a fastening nut 46 that prevents the coil spring 43 from coming off against the urging force. In this case, the lower end screw portion 57 has a size corresponding to the thickness of the fastening nut 46 and is prevented from loosening by being screwed to the end of the lower end screw portion 57 to the maximum extent. In the present embodiment, the single fastening nut 46 prevents it from coming off, but this configuration may be replaced by a double nut. In this case, by securing the dimension of the lower end screw portion 57 to be wide, the tightening position of the nut can be freely adjusted, and the spring stroke of the coil spring 43 can be freely adjusted.

  The internal pipe 41 is formed of a plastic material such as aluminum, and a pair of pin holes 25 are formed so as to penetrate the upper end portion in the radial direction. Then, the pin hole 51 formed in the lower pipe 22 and the pin hole 25 formed in the internal pipe 41 are overlapped, and the penetration pin 52 is press-fitted into the pin hole 51 so that the internal pipe 41 is fixed to the lower pipe 22. ing. Since the pin hole 51 formed in the lower pipe 22 is always covered with the upper pipe 21 as described above, the penetrating pin 52 is not exposed to the outside, and the design is not deteriorated.

  The receiving member 42 is formed in a cylindrical shape using a plastic material such as hard resin or aluminum, an insertion hole 53 is formed in the shaft center, and a flange portion having the same diameter as the lower pipe is formed in the lower end portion. The receiving member 42 is inserted into the internal pipe 41 from the upper end side, and the position of the receiving member 42 is regulated in a state where the flange portion abuts against the lower end of the internal pipe 41. In this state, the receiving member 42 and the insertion rod 44 inserted therein are caulked and fixed to the internal pipe 41 (described later). That is, the receiving member 42 and the insertion rod 44 are caulked and fixed to the internal pipe 41 so as to be tightened.

  Then, the assembly method of the stick 1 of this embodiment is demonstrated easily. First, assembly of the cushion unit 3 will be described. The fastening nut 46 is fastened and fixed to the lower end screw portion 57 of the movable shaft 45 (maximum tightening), while the receiving member 42 is inserted into the inner peripheral surface of the internal pipe 41. Then, the movable shaft 45 and the coil spring 43 are inserted into the insertion rod 44, and the upper end screw portion 54 is further inserted into the member 42. Here, while inserting the insertion rod 44 (fastening nut 46) against the coil spring 43 toward the receiving member 42, the receiving member 42 and the insertion rod 44 are caulked and fixed together with the internal pipe 41 from the outside. By assembling in this way, the internal pipe 41, the receiving member 42, the movable shaft 45, the coil spring 43, and the insertion rod 44 can be unitized, and the assemblability of the stick 1 can be improved.

  The assembled cushion unit 3 is inserted into the lower pipe 22 from the inner pipe 41 side, and is press-fitted and fixed in the stick main body (lower pipe 22) 2 by the through pin 52. At this time, most of the cushion unit 3 is covered (incorporated) by the stick main body 2 and only the substantially half of the movable shaft 45 is exposed to the outside. Then, the handle 4 is attached to the upper end portion of the cushion unit 3, and the stone protrusion 5 is attached to the lower end portion of the movable shaft 45. In this way, the walking stick 1 is assembled. At this time, a part of the movable shaft 45 is exposed from the stick main body 2 and the stone protrusion 5, and this exposed portion corresponds to the maximum stroke amount of the stick 1 described above.

  When the user puts his / her body weight and pushes the stick 1 against the ground, the movable shaft 45 is moved upward relative to the stick main body 2 due to an impact from the ground, and the coil spring 43 pushed into the movable shaft 45. The shock is absorbed by the contraction of. On the other hand, when the user lifts the stick 1, the movable shaft 45 is automatically pushed back to the original position by the biasing force of the coil spring 43. At this time, since the outer peripheral surface of the movable shaft 45 is guided by the stick body 2 and the inner peripheral surface is guided by the insertion rod 44, there is no blurring when the movable shaft 45 slides, and the stick 1 is pushed up. The user does not feel uncomfortable when lifting. Thus, since the impact is absorbed every time the user pushes the stick 1 against the ground, the burden on the shoulder due to the user using the stick 1 for a long time can be reduced.

  As described above, according to the stick 1 of the present embodiment, the receiving member 42 is caulked to the inner pipe 41 and fixed to the surface of the stick body 2 by caulking. The produced dent part is not visually recognized from the outside, and the designability is not deteriorated. Further, since the receiving member 42 is caulked and fixed not to the stick body 2 but to the internal pipe 41, the material of the stick body 2 is not limited, and both the internal pipe 41 and the stick body 2 are cylindrical. Therefore, the degree of freedom of the fixing method between the internal pipe 41 and the stick body 2 is increased, and the design change is facilitated.

It is a front view of a walking stick. It is sectional drawing of a cushion unit, a stick main body, and a stone tip.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Stick 2 ... Stick body 3 ... Cushion unit 4 ... Handle 5 ... Stone bump 21 ... Upper pipe 22 ... Lower pipe 34 ... Annular groove 41 ... Internal pipe 42 ... Receiving member 43 ... Coil spring 44 ... Operation rod 45 ... Movable shaft 46 ... Fastening nut 52 ... through pin 54 ... through hole

Claims (4)

A cylindrical stick body with a handle on the upper end;
A cushion unit built in the lower part of the stick body with the lower part protruding from the lower end of the stick body,
A stone bump provided at the lower end of the cushion unit,
The cushion unit includes an internal pipe fixed to an inner peripheral surface of the stick body,
A receiving member housed in the internal pipe;
A movable shaft provided at the lower end with the stone protrusion and slidably mounted on the stick body;
A coil spring interposed between the receiving member and the movable shaft,
The walking stick is characterized in that the receiving member is caulked integrally with the inner pipe from the outside and fixed to the inner pipe.   The walking stick according to claim 1, wherein a plurality of annular grooves that are concentric circles are formed on the ground surface of the stone protrusion. The cushion unit is
The coil spring is loosely inserted and held, and further includes an insertion rod that is slidably inserted into a through hole formed in the axis of the movable shaft.
One end of the insertion rod is fixed to the receiving member by the integral caulking, and the other end is provided with a retaining member for retaining the movable shaft against the coil spring. The walking stick according to claim 1 or 2, characterized in that: The stick body has an upper pipe provided with the handle at the upper end, and
The inner pipe is fixed to the inner peripheral surface, and the lower pipe is nested in the upper pipe;
A length adjusting mechanism that is interposed between the upper pipe and the lower pipe and adjusts the length of the nesting state;
The inner pipe is located at an overlap portion between the upper pipe and the lower pipe adjusted to the maximum length by the length adjusting mechanism and is fixed by a through pin with respect to the lower pipe. The walking stick according to any one of claims 1 to 3.

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