JP2007014586A - Telescopic mechanism of bar-like member and human body transfer assistant device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a telescopic mechanism of a bar-like member, capable of being easily adjusted to an arbitrary length, and a human body transfer assistant device equipped with the same. <P>SOLUTION: The telescopic mechanism 1 of the bar-like member comprises a square tube part 2, a square bar part 3, a pin 4, an abutting part 5, a face nut 6, a cam part 7, a cam socket 8 and a socket storage part 9. When the square bar part 3 is located at an arbitrary position of the square tube part 2, a lever part 7d of the cam part 7 is rotated, by which a shaft supporting part 7c is rotated. Then, according to the rotation, a shaft part 7b is moved to the outside of the square tube part 2. As the pin 4 supported to the shaft part 7b is also moved with the movement of the shaft part, the abutting part 5 attached to the other end of the pin 4 presses the square bar part 3, and the outer surface of the square bar part 3 presses the inner surface of the square tube part 2, so that the square bar part 3 is fixed to the square tube part 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a telescopic mechanism for a rod-shaped member, and a human body movement assistance device such as a walker and a wheelchair including the same.

  Some human body movement assistance devices such as walker and wheelchair are configured so that the width can be adjusted in accordance with the width of the body of the person using the device.

  FIG. 8 is a cross-sectional view showing a conventional rod-like member expansion / contraction mechanism 31 used in such a human body movement assistance device. The rod-shaped member expansion / contraction mechanism 31 includes a cylindrical portion 32, a core rod portion 33, a bolt 34 and a nut 35. A bolt insertion hole 32a through which the bolt 34 is inserted is provided at the end of the cylindrical portion 32, and the core rod portion 33 is provided with four insertion holes 33a having the same diameter as the bolt insertion hole 32a. . The core bar portion 33 is configured to be able to slide in the cylindrical portion 32.

  In the rod-shaped member expansion / contraction mechanism 31, the user selects and selects the insertion hole 33 a for making the human body movement assistance device have a desired width in a state where the core rod portion 33 is fitted inside the cylindrical portion 32. The insertion hole 33a is aligned with the bolt insertion hole 32a, the bolt 34 is inserted into these holes, the end of the inserted bolt 34 is tightened with the nut 35, and the core rod part 33 is fixed to the cylinder part 32. .

  However, in the telescopic mechanism 31 of the rod-shaped member, there is a problem that the width can be adjusted only in four stages corresponding to the position of the insertion hole 33a, and cannot be adjusted to an arbitrary width. In addition, the bolt 34 must be removed from the bolt insertion hole 32a and the insertion hole 33a every time the width is adjusted, and there is a problem that the operation is complicated.

  An object of the present invention is to provide a rod-shaped member expansion / contraction mechanism that can be adjusted to an arbitrary length and that can be easily adjusted, and a human body movement assistance device including the same.

The telescopic mechanism of the rod-shaped member according to the present invention is
(1) Pin,
(2) A contact member screwed to one end of the pin,
(3) a cylindrical member provided on one side surface, provided with a pin insertion hole through which the pin is inserted, and a contact portion insertion hole provided on a side surface facing the one side surface, through which the contact member is inserted;
(4) A through hole is provided so that the longitudinal direction coincides with the longitudinal direction, and the inside of the cylindrical member is slid with the pin inserted into the through hole. (5) A shaft portion on which the other end of the pin is pivotally mounted, a shaft support portion that supports the shaft portion in a state in which the central axis of the shaft portion is shifted from the central axis, And a lever portion. By rotating the lever portion, the pin has a cam member configured to move to the other end side of the pin.

The human body movement assistance device according to the present invention is:
(1) Pin,
(2) A contact member screwed to one end of the pin,
(3) a cylindrical member provided on one side surface, provided with a pin insertion hole through which the pin is inserted, and a contact portion insertion hole provided on a side surface facing the one side surface, through which the contact member is inserted;
(4) A through hole is provided so that the longitudinal direction coincides with the longitudinal direction, and the inside of the cylindrical member is slid with the pin inserted into the through hole. (5) A shaft portion on which the other end of the pin is pivotally mounted, a shaft support portion that supports the shaft portion in a state in which the central axis of the shaft portion is shifted from the central axis, And a lever portion. By rotating the lever portion, a pin-like member expansion / contraction mechanism having a cam member configured to move the pin to the other end side of the pin is provided.

  The rod-like member expansion / contraction mechanism according to the present invention is such that when the rod-like member is in an arbitrary position, the pin moves by rotating the lever portion of the cam member, and the contact member presses the rod-like member accordingly. On the other side, the outer surface of the rod-shaped member comes into contact with the inner surface of the cylindrical member, and the rod-shaped member cannot slide and is fixed to the cylindrical member. Therefore, it can be easily expanded and contracted to an arbitrary length.

  Since the human body movement assistance device according to the present invention includes the telescopic mechanism for the rod-shaped member, it can be easily changed to an arbitrary width.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings.

  1 is a perspective view showing a telescopic mechanism 1 according to an embodiment of the present invention, FIG. 2 is an exploded plan view thereof, FIG. 3 is a transverse sectional view, and FIG. 4 is a sectional view taken along line IV-IV in FIG. is there.

  The telescopic mechanism 1 includes a square tube part 2, a square bar part 3, a pin 4, a contact part 5, a decorative nut 6, a cam part 7, a cam receiving part 8 and a receiving part storage part 9. A pin insertion hole 2a through which the pin 4 is inserted is provided on the side surface on the front side of the rectangular tube portion 2, and a contact portion insertion hole 2b through which the contact portion 5 is inserted is provided on the side surface facing this. It has been. The square bar portion 3 is provided with a through hole 3 a that penetrates in the width direction of the square bar portion 3 in a state where the longitudinal direction coincides with the longitudinal direction of the square bar portion 3. The rectangular bar portion 3 is configured to be fitted into the rectangular tube portion 2 in a state where the pin 4 is inserted through the through hole 3a and to slide inside the rectangular tube portion 2.

  A male thread 4a is provided at one end of the pin 4, and a ring part 4b is provided at the other end. The cam receiving portion 8 includes a concave portion 8 a having a shape that coincides with the outer peripheral surface of a shaft support portion 7 c of the cam portion 7 to be described later. The cam receiving portion 8 is accommodated inside the receiving portion accommodating portion 9. The abutting portion 5 has a larger diameter at the end than the other portions, and a female screw 5a is provided at the center.

  The pin 4 is inserted through the pin insertion hole 2a and the contact portion insertion hole 2b of the rectangular tube portion 2 with the cam receiving portion 8 and the receiving portion storage portion 9 interposed therebetween. The female screw 5a is screwed to the male screw 4a, the contact portion 5 is fastened to the end of the pin 4, and the decorative nut 6 is fastened to the tip of the pin 4.

  The cam portion 7 includes a shaft portion fastening portion 7a, a shaft portion 7b, a shaft support portion 7c, and a lever portion 7d. The ring portion 4b of the pin 4 is arranged with the central axis of the hole of the ring portion 4b aligned in the vertical direction, and the shaft portion 7b is inserted into the hole of the ring portion 4b. The shaft support portion 7c supports the shaft portion 7b in a state where the center axis of the shaft portion 7b is slightly shifted from the center axis of the shaft support portion 7c. The shaft portion 7b is fixed to the outer surface of the shaft support portion 7c by a shaft portion fastening portion 7a having a larger diameter than the shaft portion 7b.

  FIG. 5 is a cross-sectional view for explaining the operation of the telescopic mechanism 1. When the lever portion 7d of the cam portion 7 is rotated in the direction of arrow A in the drawing, the shaft support portion 7c rotates. Since the central axis of the shaft portion 7b is slightly shifted from the central axis of the shaft support portion 7c, the shaft portion 7b moves in a direction away from the rectangular tube portion 2 (in the direction of arrow B in the figure) with this rotation. To do. As the shaft portion 7b moves in the direction of the arrow B, the pin 4 supported by the shaft portion 7b also moves, so that the contact portion 5 attached to the other end of the pin 4 presses the square bar portion 3 to The bar 3 also moves in the direction of arrow B. As a result, the outer surface of the rectangular bar portion 3 comes into contact with the inner surface of the rectangular tube portion 2, and the frictional force between the outer surface and the inner surface prevents the rectangular bar portion 3 from sliding to the left and right with respect to the rectangular tube portion 2. The

  According to the telescopic mechanism 1, the square bar portion 3 is fixed to the square tube portion 2 by rotating the lever portion 7 d of the cam member 7 when the square rod portion 3 is at an arbitrary position of the square tube portion 2. Therefore, the total length of the square tube portion 2 and the square rod portion 3 can be adjusted to a desired length. Therefore, the length can be adjusted steplessly. The length can be easily adjusted without loosening or removing the contact portion 5 and the decorative nut 6 in a state where the pin 4 is inserted through the rectangular tube portion 2.

  In addition, in the expansion-contraction mechanism of the rod-shaped member of this embodiment, although demonstrated about the case where a cylindrical member and a rod-shaped member are square shape, it is not limited to this, A round shape may be sufficient. Further, in the present embodiment, the case where the rod-like member is solid is described, but a pipe-like member may be used.

  FIG. 6 is a perspective view showing an upper part of a walker 11 according to another embodiment of the present invention, and FIG. 7 is a partially enlarged cross-sectional view of FIG. The upper part of the walker 11 includes a pair of armrests 12, four support pipes 13, a small frame 14, a large frame 15, a pin 16, a cam portion 17, a receiving portion 18, a receiving portion receiving portion 19, a contact portion 20, and A decorative nut 21 is provided.

  A pin insertion hole 15a through which the pin 16 is inserted is provided on the front side surface of the rectangular tubular large frame 15, and a contact portion insertion hole 15b through which the contact portion 20 is inserted on the opposite side surface. Is provided. The small frame 14 is provided with a through hole 14 a whose longitudinal direction coincides with the longitudinal direction of the small frame 14 and penetrates in the width direction of the small frame 14. The small frame 14 is configured to be slidable inside the large frame 15 with the pin 16 inserted through the through hole 14a.

  A male thread 16a is provided at one end of the pin 16, and a ring part 16b is provided at the other end. The cam receiving part 18 is accommodated inside the receiving part accommodating part 19. The abutting portion 20 has a larger diameter at the end than the other portions, and a female screw 20a is provided at the center.

  The pin 16 is inserted through the pin insertion hole 15a and the contact portion insertion hole 15b of the large frame 15 with the cam receiving portion 18 and the receiving portion storage portion 19 interposed therebetween. The female screw 20a is screwed to the male screw 16a, the contact portion 20 is fastened to the end of the pin 16, and the decorative nut 21 is fastened to the tip of the pin 16.

  The cam portion 17 includes a shaft portion fastening portion 17a, a shaft portion 17b, a shaft support portion 17c, and a lever portion 17d. The ring portion 16b of the pin 16 is disposed in a state where the central axis of the hole of the ring portion 16b is aligned with the vertical direction, and the shaft portion 17b is inserted into the hole of the ring portion 16b. The shaft support portion 17c supports the shaft portion 17b in a state where the center axis of the shaft portion 17b is slightly shifted from the center axis of the shaft support portion 17c. The shaft portion 17b is fixed to the outer surface of the shaft support portion 17c by a shaft portion fastening portion 17a having a larger diameter than the shaft portion 17b.

  When the lever portion 17d of the cam portion 17 is rotated, the shaft support portion 17c is rotated. Since the center axis of the shaft portion 17b is slightly shifted from the center axis of the shaft support portion 17c, the shaft portion 17b moves in a direction away from the large frame 15 with this rotation. As the shaft portion 17b moves, the pin 16 supported thereby also moves, so that the contact portion 20 attached to the other end of the pin 16 presses the small frame 14, and the small frame 14 also moves outward. To do. As a result, the outer surface of the small frame 14 comes into contact with the inner surface of the large frame 15, and the small frame 14 is prevented from sliding relative to the large frame 15.

  According to this walker 11, when the small frame 14 is at an arbitrary position of the large frame 15, the small frame 14 is fixed to the large frame 15 by rotating the lever portion 17 d of the cam member 17. The total length of the small frame 14 and the large frame 15 can be adjusted to a desired length. Therefore, it is possible to adjust the length steplessly, and the width of the frame can be arbitrarily changed according to the width of the body of the person using this walker 11. Further, this width adjustment can be easily performed without loosening or removing the tightening of the contact portion 20 and the decorative nut 21 in a state where the pin 16 is inserted through the large frame 15.

  The telescopic mechanism of the rod-shaped member according to the present invention can be applied to human body movement assistance devices such as a walker and a wheelchair.

FIG. 1 is a perspective view showing a telescopic mechanism for a rod-shaped member according to an embodiment of the present invention. FIG. 2 is an exploded plan view showing a telescopic mechanism of the rod-shaped member of FIG. FIG. 3 is a cross-sectional view of the telescopic mechanism of the rod-shaped member of FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view of the telescopic mechanism of the rod-shaped member of FIG. FIG. 6 is a perspective view showing an upper part of a walker according to another embodiment of the present invention. FIG. 7 is a partially enlarged cross-sectional view showing the walker of FIG. FIG. 8 is a cross-sectional view showing a conventional rod-like member expansion / contraction mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Telescopic mechanism of a rod-shaped member 2 ... Square tube part 3 ... Square bar part 4 ... Pin 5 ... Contact part 6 ... Cosmetic nut 7 ... Cam part 7a ...・ Shaft fastening portion 7b ... Shaft portion 7c ... Shaft support portion 7d ... Lever portion 8 ... Cam receiving portion 9 ... Receiving portion storage portion 11 ... Walking device 12 ... Arm rest DESCRIPTION OF SYMBOLS 13 ... Support pipe 14 ... Small frame 15 ... Large frame 16 ... Pin 17 ... Cam part 18 ... Receiving part 19 ... Receiving part accommodating part 20 ... Contact part 21 ... Cosmetic nut

Claims (2)

idea,
A contact member screwed into one end of the pin;
A cylindrical member provided on one side surface, provided with a pin insertion hole through which the pin is inserted, and a side surface facing the one side surface, and provided with a contact portion insertion hole through which the contact member is inserted;
A through hole is provided so that the longitudinal direction coincides with the longitudinal direction, and the inside of the cylindrical member is slid with the pin inserted through the through hole. A rod-shaped member configured to
A shaft portion on which the other end of the pin is pivotally mounted; a shaft support portion for supporting the shaft portion in a state where the central axis of the shaft portion is shifted from the central axis thereof; and a lever portion. A telescopic mechanism for a rod-shaped member having a cam member configured to move the pin to the other end side of the pin by rotating the portion. idea,
A contact member screwed into one end of the pin;
A cylindrical member provided on one side surface, provided with a pin insertion hole through which the pin is inserted, and a side surface facing the one side surface, and provided with a contact portion insertion hole through which the contact member is inserted;
A through hole is provided so that the longitudinal direction coincides with the longitudinal direction, and the inside of the cylindrical member is slid with the pin inserted through the through hole. A rod-shaped member configured to
A shaft portion on which the other end of the pin is pivotally mounted; a shaft support portion for supporting the shaft portion in a state where the central axis of the shaft portion is shifted from the central axis thereof; and a lever portion. A human body movement assisting device comprising a rod-like member expansion / contraction mechanism having a cam member configured to move the pin to the other end side of the pin by rotating the portion.

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