JP6751734B2 - Lofstrand crutch - Google Patents

Description

The present invention relates to Lofstrand Crutch. In particular, the present invention relates to a Lofstrand Crutch in which a cane and a forearm have suitable holding stability and convenience of use.

Conventional Lofstrand Crutches provide grip stability primarily by providing a cuff above the cane to hold the forearm. FIG. 9 shows one of the conventional structures. That is,
Mainly provided with a support 1', a grip 2'and a cuff portion 3', a soft plastic cap 11'is provided below the support 1', and the grip 2'is provided above the support 1'. The cuff portion 3'is provided at the top end of the support column 1', and includes two holding members 31'and 32' facing each other.
Further, one end of the two holding members 31', 32'is connected to the support column 1', and the other ends of the two holding members 31', 32' have a gap 33', and the two holding members 31', 32' It has a fitting groove 34'between'.
As a result, the user grips the grip 2'by hand, passes the forearm through the fitting groove 34', holds the forearm with the holding members 31', 32', and holds the forearm with the cuff portion 3'. Improves holding stability when holding the cane with the hand.

However, if the holding members 31'and 32'are deformed, the forearm cannot be stably held, and the forearm may be separated from the interval 33'.
Further, the support elasticity of the cap 11'lower than the support column 1'is poor, and there is a defect that the comfort in use is inferior.

In order to improve the above defects, the Lofstrand Crutch disclosed in Patent Document 1 is provided with a band body between the ends of two holding members of the cuff portion. After passing the forearm through the cuff, the band body and the ends of the two holding members are connected, and the forearm is wound and joined by the two holding members and the band body, so that the holding stability of the cuff and the forearm is improved. improves.
However, when the above structure is used, the band body and the two holding members must be joined, which is inconvenient in terms of use.

U.S. Pat. No. US20110232709

An object of the present invention is to provide a structure having suitable holding stability and convenience of use between a cane and a forearm.

Another object of the present invention is to provide a structure with suitable support comfort.

A further aspect of the present invention is to provide a structure that improves applicability by adjusting the length.

The present invention is a Lofstrand Crutch including a strut, a grip, and a holding device.
The stanchions can be in contact with the ground and have a cuff above.
The grip is provided at a position corresponding to the lower part of the cuff portion in front of the support column.
The holding device has two holding members corresponding to both sides of the cuff portion, two elastic bodies corresponding to the two holding members, and two pivot posts corresponding to the two elastic bodies.
Two notches are provided on both sides of the cuff portion of the support column, and an upper pivot connection portion and a lower pivot connection portion protruding from the side surface of each of the notch portions are provided above and below each of the notch portions. Each of the upper pivots is provided with a pivot hole , an insertion groove is provided on the inner wall of each of the pivot holes so as to extend, and each of the lower pivots has a shaft post protruding upward. Provided.
Each of the holding members has a holding portion capable of holding the forearm of the user, a side pivot portion is provided at one end of each holding portion, and each side pivot portion is each of the corresponding cuff portions. It is housed in the position of the notch, and a slot is provided at a position corresponding to each of the pivot holes of each of the upper pivots, and corresponds to the shaft post of the lower pivot below the lateral pivot. A shaft hole into which the shaft post can be fitted is provided at the position where the shaft post is to be fitted.
Each of the pivotal posts is provided at the position of each of the pivotal holes in each of the superior pivotal portions, a joint having a concave groove is provided above the pivotal connection post, and the lateral pivotal connection is provided below. Each of the holding members has a first insertion portion through which each of the slots of the portion can be inserted, and each of the holding members can rotate each of the corresponding pivoting posts within the pivoting hole.
Each of the elastic bodies is a torsion spring having a coil, a first end above the coil and a second end below the coil, and the coil is fitted onto the joint of the pivot post. The first end and the second end are joined to the recess of the pivot post and the insertion groove of the upper pivot, respectively.
A gap is provided between each front end of each holding portion.
Each of the elastic bodies is sequentially connected to each of the corresponding pivot posts, each of the upper pivots of each of the columns, and each of the slots of each of the holding members, and is fitted on both sides of the cuff. An elastic holding force is provided in a direction in which the front ends of the holding members are brought close to each other.

Further, the lower pivotal connection portion of the support column is provided with a restraint portion having a diameter smaller than the lower portion above the shaft post, and the restraint body is projected from the outer edge of the restraint portion.
The contact body to limit the minimum holding angle of the restraining member and two holding members together in contact above the shaft hole is provided.

The strut of the present invention includes an upper strut, a lower strut, and a lock button. The upper and lower columns are assembled with a lock button, the cuff portion is provided on the upper column, and an elastic support portion is provided below the lower column. A joint groove is provided in the vertical direction below the upper strut, a second joint hole is provided on one side of the joint groove, and an insertion portion through which the joint groove can be inserted is provided above the lower strut and below. An elastic support is provided.
A plurality of third joint holes are provided at different heights of the insertion portion, and after inserting the insertion portion to an appropriate length of the joint groove, the lock button is inserted into the third joint hole of the lower column. The length of the assembly is fixed by inserting it through the third joint hole of the column.
The elastic support portion comprises a straight section connecting below the fitting portion and has an arc-shaped bend below the straight section. An upper contact piece and a lower contact piece are projected on the upper and lower inner surfaces facing each other having a bottom portion below the bent portion, and the bent portion is provided between the upper and lower contact pieces. Spacing and deforming intervals.

The two holding members of the holding device of the present invention can provide convenience, reliability and stability of holding the forearm by providing a suitable holding force through an elastic body. Further, the bent portion of the lower strut can provide suitable support comfort, and the amount of deformation of the bent portion can be limited by the contact of the lower abutting piece, so that the effect of suitable support safety is achieved. Play.

It is an exploded perspective view of this invention. It is a partial decomposition perspective view of this invention. It is a perspective view after assembly of this invention. FIG. 3 is a cross-sectional view taken along the line AA of FIG. 3 of the present invention. FIG. 3 is a sectional view taken along line BB of FIG. 3 of the present invention. It is a schematic diagram when the forearm is held by the holding member of this invention. It is a partial cross-sectional view when adjusting the length of the support column of this invention. It is a schematic diagram which shows the embodiment of this invention, and is the partially enlarged sectional view. It is a perspective view which shows the conventional Lofstrand Crutch.

Hereinafter, "two end portions 332 and 333" shall be read as "second end portion 332 and first end portion 333".
Refer to FIGS. 1 to 5. The present invention includes a support column 1, a grip 2, and a holding device 3, and the support column 1 can come into contact with the ground. Further, the upper support column 11, the lower support column 12, and the lock button 19 are provided. A cuff portion 13 is provided above the upper support column 11, and opposed notch portions 131 are provided on both sides of the cuff portion 13, and the two notch portions 131 project above and below from the side surface of the notch portion 131. Lower pivots 14, 15 are provided.
The upper pivotal connection portion 14 is provided with a pivotal connection hole 141, and an insertion groove 142 and a plurality of engaging protrusions 143 are extended and provided on the inner wall of the pivotal connection hole 141, and the lower pivotal connection portion 15 projects upward. A shaft post 151 is provided, and a restraint portion 152 having a diameter smaller than the lower side is provided above the shaft post 151.
Further, a restraint body 153 is projected from the outer edge of the restraint portion 152, a first joint hole 111 is provided behind the top of the upper support column 11, and a non-slip member 112 is installed, and the non-slip member 112 holds a cane. It acts as a non-slip when leaning against a wall (not shown).
A joint groove 113 is provided in the vertical direction below the upper support column 11, and a second joint hole 114 is provided on one side of the joint groove 113. Further, a plurality of contact convex portions 10 are provided behind the upper support column 11, and the contact convex portions 10 are contact-supported and fixed to the end of the table top plate (not shown), so that the cane falls. Can provide the convenience of preventing.

A second fitting portion 16 through which the joint groove 113 can be inserted is provided above the lower support column 12, and an elastic support portion 17 is provided below.
A plurality of third joint holes 161 are provided at different heights of the second insertion portion 16, and the second insertion portion 16 is inserted into an appropriate length of the joint groove 113, and then the lock button 19 is lowered. The length of the assembly is fixed by inserting it into the third joint hole 161 of the support column 12 and the second joint hole 114 of the upper support column 11.
The elastic support portion 17 includes a straight section 171 that connects to the lower part of the second fitting portion 16, has an arc-shaped bent portion 18 below the straight section 171 and has a bottom portion 181 below the bent portion 18. A non-slip pad 182 (FIGS. 7 and 8) is provided below the bottom 181.
Further, an upper abutting piece 183 and a lower abutting piece 184 are projected on the upper and lower inner surfaces facing each other corresponding to the bent portion 18, and the bent portion 18 is compressively deformed between the upper and lower abutting pieces 183 and 184. There is an interval of 185 (FIGS. 7 and 8).

The grip 2 is provided at a position corresponding to the front of the upper support column 11 of the support column 1 and the lower side of the cuff portion 13.

The two holding devices 3 include two corresponding holding members 31, two corresponding pivot posts 32, two corresponding elastic bodies 33, and two corresponding lids 34.
The two holding members 31 are provided on both sides of the cuff portion 13, and are provided with holding portions 311 capable of holding the forearm. A side pivot portion 312 is provided at one end of the holding portion 311, and the side pivot portion 312 can be accommodated at the notch 131 position of the cuff portion 13.
A non-circular slot 313 is provided at a position corresponding to the pivot hole 141 of the upper upper pivot portion 14, and a shaft is provided at a position corresponding to the shaft post 151 of the lower pivot portion 15 below the side pivot portion 312. A shaft hole 314 into which the post 151 can be fitted is provided, and a contact body 315 capable of contacting the restraint body 153 above the shaft hole 314 and limiting the minimum holding angle of the two holding members 31 is provided.

The two pivot posts 32 are each provided at the pivot hole 141 position of the two upper pivots 14, and the non-circular insertion portion 321 through which the slot 313 of the side pivot 312 of the holding member 31 can be inserted below. And the holding member 31 can rotate the pivot post 32 in the pivot hole 141.
Further, a columnar joint portion 322 is provided above the pivot post 32, and a concave groove 323 is provided in the joint portion 322.

The two elastic bodies 33 each provide the two holding members 31 with elastic holding forces corresponding to the cuff portion 13. The two elastic bodies 33 are metal torsion springs, comprising a coil 331 and two end portions 332, 333, the coil 331 fitting over the joint portion 322 of the pivot post 32, and two end portions 332, 333. Are joined to the concave groove 323 of the pivot post 32 and the insertion groove 142 of the upper pivot 14, respectively.
The two holding members 31 are held through the elastic force of the elastic body 33, and the abutting body 315 is brought into contact with the restraining body 153, and between the front ends of the holding portions 311 of the two holding members 31 from the diameter of the human forearm. Have a small interval 316.

The two lids 34 can cover the apex of the pivot hole 141 of the superior pivot 14. Further, the lid plate 341 and the side wall 342 extending downward from the peripheral edge of the lid plate 341 are provided, and the lid body 34 is joined to the engaging ridge 143 via the side wall 342 to stably cover the pivot hole 141. Can be done. Further, by shielding the elastic body 33 and the pivot post 32, the texture of the assembly can be improved.

The two holding members 31 of the holding device 3 of the present invention can provide a suitable holding force through the metal elastic body 33. The metal elastic body 33 can be used for a long time, is less likely to cause elastic fatigue, and has more suitable holding stability than the conventional one that holds the forearm by the bending of the holding member itself.

See FIG. The two holding members 31 of the present invention come into contact with the restraint body 153 through the abutting body 315 to provide an interval 316 between the two holding members 31. The two holding members 31 are opened and the user's forearm 4 is inserted between the two holding members 31 as shown in FIG. 6, which has the effect of suitable convenience in use.

See FIGS. 7 and 8. In the present invention, in order to fix the appropriate length of the support column 1, the appropriate third joint hole 161 of the lower support column 12 and the second joint hole 114 of the upper support column 11 are joined by the lock button 19 according to the needs of the user. Can be made to.
The two holding members 31 of the present invention hold the forearm with a suitable holding force and can prevent the cane and the forearm from coming off.
Further, when the support column 1 receives a pressing force, the bent portion 18 can provide elasticity in an appropriate compression deformation.
Further, when the rolling force is relatively large, the upper and lower contact pieces 183 and 184 come into contact with each other to prevent the length of the cane from being significantly changed due to excessive deformation of the bent portion 18, and the bent portion 18 By preventing breakage, it is possible to have both a comfortable support and a safety effect.

Therefore, as can be seen from the above, the present invention has the effects of stability qualitativeness, reliability, and convenience for holding the forearm, which are far more suitable than the conventional structure.

In addition, the specific examples disclosed as described above merely clarify the technical contents of the present invention, and are not intended to limit the interpretation of the present invention. Various modifications and modifications can be made without departing from the spirit of the invention, as long as they are made within the equal scope of the invention. It goes without saying that the results of those modifications and changes are also included within the scope of the present invention. The scope of the present invention is limited to the appended claims.

1 Strut 10 Contact convex part 11 Upper strut 111 1st joint hole 112 Non-slip pad 113 Joint groove 114 2nd joint hole 12 Lower strut 13 Cuff part 131 Notch part 14 Upper pivot part 141 Pivot connection hole 142 Insertion groove 143 Engagement ridge 15 Lower pivot connection 151 Axis post 152 Restraint part 153 Restraint body 16 Second insertion part 161 Third joint hole 17 Elastic support part 171 Straight section 18 Bend part 181 Bottom part 182 Non-slip pad 183 Top contact piece 184 Lower abutment piece 185 Interval 19 Lock button 2 Grip 3 Retaining device 31 Retaining member 311 Retaining part 312 Side pivot part 313 Slot 314 Shaft hole 315 Contact body 316 spacing 32 Pivot connection post 321 First insertion part 322 Joint part 323 Recessed groove 33 Elastic body 331 Coil 332 End part 333 End part 34 Lid body 341 Lid plate 342 Side wall 4 Forearm 1'Strut 2'Grip 3'Cuff part 31' Holding member 32' Holding member 33' Spacing 34' Fitting part

Claims (8)

With a support that can be in contact with the ground and has a cuff on the top,
A grip provided at a position corresponding to the lower part of the cuff portion in front of the support column,
A Lofstrand crutch comprising two holding members corresponding to both sides of the cuff portion, two elastic bodies corresponding to the two holding members, and a holding device having two pivot posts corresponding to the two elastic bodies. It ’s a clutch,
Two notches are provided on both sides of the cuff portion of the support column, and an upper pivot connection portion and a lower pivot connection portion protruding from the side surface of each of the notch portions are provided above and below each of the notch portions. Each of the upper pivots is provided with a pivot hole , an insertion groove is provided on the inner wall of each of the pivot holes so as to extend, and each of the lower pivots has a shaft post protruding upward. Provided,
Each of the holding members has a holding portion capable of holding the forearm of the user, a side pivot portion is provided at one end of each holding portion, and each side pivot portion is each of the corresponding cuff portions. It is housed in the position of the notch, and a slot is provided at a position corresponding to each of the pivot holes of each of the upper pivots, and corresponds to the shaft post of the lower pivot below the lateral pivot. A shaft hole is provided at the position where the shaft post can be fitted.
Each of the pivotal posts is provided at the position of each of the pivotal holes in each of the superior pivotal portions, a joint having a concave groove is provided above the pivotal connection post, and the lateral pivotal connection is provided below. Each of the holding members has a first insertion portion through which each of the slots of the portion can be inserted, and each of the holding members can rotate each of the corresponding pivotal posts within the pivotal hole.
Each of the elastic bodies is a torsion spring having a coil, a first end above the coil and a second end below the coil, and the coil is fitted onto the joint of the pivot post. The first end and the second end are joined to the concave groove of the pivot post and the insertion groove of the upper pivot, respectively.
A gap is provided between each front end of each of the holding portions.
Each of the elastic bodies is sequentially connected to each of the corresponding pivot posts, each of the upper pivots of each of the columns, and each of the slots of each of the holding members, and is fitted on both sides of the cuff. A Lofstrand Crutch, which provides an elastic holding force in a direction in which the front ends of the holding members are brought close to each other. The Lofstrand Crutch according to claim 1, wherein the two elastic bodies are made of a metal material. The lower pivotal connection portion of the support column is provided with a restraint portion having a diameter smaller than that below the shaft post above the shaft post, and a restraint body is projected from the outer edge of the restraint portion.
The Lofstrand Crutch according to claim 1, wherein a contact body that comes into contact with the restraint body and limits the minimum holding angle of the two holding members is provided above the shaft hole. The Lofstrand Crutch according to claim 1, wherein the holding device further includes two lids, and the two lids can cover the pivot hole of the upper pivot. An engaging ridge is provided on the inner wall of the pivot hole of the upper pivot.
The lid body includes a lid plate and a side wall extending downward from the peripheral edge of the lid plate, and the lid body is joined to the engaging ridge via the side wall to stabilize the pivot hole. The Lofstrand Crutch according to claim 4, characterized in that it can be covered. The strut includes an upper strut, a lower strut, and a lock button, the upper strut and the lower strut are assembled by the lock button, the cuff portion is provided on the upper strut, and a support portion is provided below the lower strut. The Lofstrand Crutch according to claim 1, wherein the Lofstrand Crutch is provided. A joint groove is provided in the vertical direction below the upper column, and a second joint hole is provided on one side of the joint groove.
Further, a second insertion portion through which the joint groove can be inserted is provided above the lower support column, and a plurality of third joint holes are provided at different positions of the height of the second insertion portion, and the second insertion portion is provided. After inserting the portion into an appropriate length of the joint groove, the lock button is inserted into the plurality of third joint holes of the lower strut corresponding to the appropriate length of the joint groove and the upper strut. The Lofstrand Crutch according to claim 6, wherein the length of the assembly is fixed by inserting it through the second joint hole. The support portion comprises a straight section connecting below the second fitting portion.
An arc-shaped bent portion is provided below the straight section, a bottom portion is provided below the bent portion, and an upper contact piece and a lower contact piece are provided on the upper inner surface and the lower inner surface facing each other corresponding to the bent portion, respectively. The Lofstrand Crutch according to claim 7, wherein the contact piece is projected so as to provide a space for compressive deformation of the bent portion between the upper contact piece and the lower contact piece.

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