JP4741635B2 - Artificial leg - Google Patents

Description

  The present invention relates to a prosthetic leg.

  Conventionally, for example, as a prosthetic leg that replaces a foot lost in an accident or the like, an upper structure part (socket part) attached to the body (thigh cut end part of the amputated leg) and the upper structure part are connected to the lower end part. A prosthetic leg (femoral prosthesis) including a lower structure part (lower leg prosthesis) having a grounding part (foot part) has been proposed. The lower structure portion is provided with a flexion / extension portion that functions as a knee joint that enables flexion / extension motion.

  As shown in FIG. 5, the upper structure portion and the lower structure portion are screwed into an annular recess 31a provided at the lower end portion of the upper structure portion 31 and a connecting protrusion 32a provided at the upper end portion of the lower structure portion 32. It is a structure to wear.

  By the way, the upper structural part 31 does not fit the user's body shape (skeleton) or is worn on the body, and then the body is deformed due to growth, etc. When it becomes a wearing state that is not a street angle), there arises a problem that walking cannot be performed satisfactorily. On the other hand, it is sufficient to design the upper structure 31 in advance so as to suit the user, but the cost is increased. Even if the upper structure 31 is designed exclusively, the body is deformed by growth thereafter. In such a case, the upper structure 31 is not optimally worn with respect to the body, which causes a problem that good walking cannot be performed.

  In order to solve this problem, a prosthetic leg (hereinafter referred to as a conventional example) in which an angle adjusting function is provided in the connecting portion between the upper structure portion 51 and the lower structure portion 52 has been proposed.

  In this conventional example, as shown in FIG. 6, the upper structure 51 and the lower structure 52 are connected via a ring member 55. Specifically, a protruding portion 53 provided at the upper end portion of the lower structure portion 52 is disposed in a ring hole 55a of a ring member 55 provided in the upper structure portion 51, and the ring member 55 is disposed in the ring hole 55a. The projecting portion 53 is configured to be sandwiched by a sandwiching member 54 (screw member) projecting to the front.

  On the other hand, the connection of the ring member 55 to the upper structure portion 51 is performed by screwing the fitting connection portion 56 provided at the lower end portion of the upper structure portion 51 to the connection protrusion 55b provided at the upper portion of the ring member 55. .

  That is, in the conventional example, the upper structure portion 51 is placed in a horizontal state with respect to the lower structure portion 52 by changing the protruding amount of each of the holding members 54 protruding in the ring hole 55a and holding the protruding portion 53. It can be connected in an appropriate inclined state.

  Therefore, in the conventional example, the upper structure portion is formed by sandwiching the projecting portions 53 by projecting each sandwiching member 54 by an appropriate amount so that the ring member 55 is disposed at an optimum angle with respect to the projecting portions 53. The lower structure portion 52 can be coupled to the body 51 in an optimal state suitable for the body. Even if the body grows and deforms after being attached to the body, the angle of the ring member 55 may be adjusted with respect to the protruding portion 53 accordingly.

  However, the conventional example has a problem that the entire length (the combined length of the upper structure portion 51 and the lower structure portion 52) is increased by the thickness of the ring member 55, and the balance with the leg that is not a prosthetic foot is deteriorated. (Because of the strength, the length of the connecting protrusion 55b is required to some extent). Considering the thickness of the ring member 55 from the beginning, the length of the upper structure portion 51 or the lower structure portion 52 may be shortened. For example, a user wearing the existing upper structure portion 31 of FIG. When the lower structure 52 (having the ring member 55) having the angle adjusting function shown in FIG. 6 is to be replaced, the above-described problem occurs.

  Further, in the conventional example, since the clamping member 54 is exposed, there is also a problem that when the use is repeated, the clamping member 54 is screwed and loosened in the opposite direction, and the adjusted angle is changed.

  The present invention focuses on the above-described problems and provides an epoch-making prosthetic limb that exhibits unprecedented effects.

  The gist of the present invention will be described with reference to the accompanying drawings.

A prosthetic leg comprising an upper structure portion 1 attached to a body and a lower structure portion 2 connected to the upper structure portion 1 and having a grounding portion 2a at a lower end thereof, wherein the lower structure portion 2 or the upper structure One of the parts 1 is provided with a projecting part 3, and the other is provided with a fitting connection part 6, and a ring member 5 is fitted into this fitting connection part 6, and the upper structure part 1 and the lower side The thickness of the connection structure with the structure portion 2 is configured to be equal to the thickness of the fitted connection portion 6, and the protruding portion 3 is configured to be disposed in the ring hole 5 a of the ring member 5. The ring member 5 is provided with a sandwiching member 4 protruding into the ring hole 5a, and the projecting portion 3 in the ring hole 5a is sandwiched by the sandwiching member 4, and the fitting connection The base end 4b of the clamping member 4 is supported by the portion 6 so that the clamping member 4 is Those of the prosthesis, characterized by being configured to hold a location.

  The prosthetic foot according to claim 1, wherein the ring member 5 is provided with a plurality of through holes 5 b, and the sandwiching member 4 is inserted into each of the through holes 5 b. It is concerned.

  The prosthetic foot according to any one of claims 1 and 2, wherein the protruding amount of the clamping member 4 in the ring hole 5a is variable. .

  The prosthetic foot according to any one of claims 1 to 3, wherein a screw groove 5c into which the fitting connecting portion 6 is screwed is formed on the outer peripheral surface of the ring member 5, and the screw groove 5c is formed. The prosthetic leg is characterized in that the through hole 5b into which the clamping member 4 is inserted is opened on the outer peripheral surface to be formed.

  Since the present invention is configured as described above, an optimal wearing state in which walking can be performed satisfactorily is obtained, and, unlike the above-described conventional example, the overall length becomes longer and the balance between the left and right feet becomes worse. This is an epoch-making prosthetic leg that exhibits unprecedented effects such as the ability to always walk well without changing the adjusted angle by repeated use.

  Embodiments of the present invention considered to be suitable will be briefly described with reference to the drawings.

  When the upper structure portion 1 and the lower structure portion 2 are connected, the projecting portion 3 provided on either the lower structure portion 2 or the upper structure portion 1 and the fitted connection portion 6 provided on the other are connected to the ring. It connects via the member 5.

  The projecting portion 3 and the ring member 5 are connected by arranging the projecting portion 3 in the ring member 5 and sandwiching the projecting portion 3 by the clamping member 4 projecting in the ring hole 5a in this state. Done.

  Further, the ring member 5 and the fitted connection portion 6 are connected by fitting the ring member 5 to the fitted connection portion 6.

  When the two are connected, each holding member 4 protrudes by an appropriate amount so that the body is optimally worn (the upper structure 1 and the lower structure 2 are connected at an optimal angle). Thus, the protruding portion 3 is sandwiched. Therefore, the lower structure part 2 can be connected to the upper structure part 1 in a state suitable for the body, and an optimal wearing state in which walking can be performed satisfactorily is obtained.

  By the way, in the present invention, when the fitting connection portion 6 provided in the upper structure portion 1 or the lower structure portion 2 is fitted and connected to the ring member 5, the base end portion 4 b of the holding member 4 is connected by the fitting connection portion 6. And the holding member 4 is held in a predetermined position.

  That is, unlike the conventional example, the ring member 55 having a thickness provided with the connection protrusion 55b on the outer periphery of the upper portion is not adopted, and the ring member 5 having a thickness to be fitted to the fit connection portion 6 is fitted and connected. Since the clamping member 4 is provided within the range fitted to the portion 6 (because the thickness of the ring member 5 is the same as the thickness of the fitted connecting portion 6), the overall length is different from the conventional example described above. It does not cause the problem that the balance between the left and right feet becomes worse as the length increases.

  Further, as described above, the present invention is configured to hold the clamping member 4 in a predetermined position by supporting the proximal end portion 4b of the clamping member 4 by the fitting connection portion 6, and therefore, different from the above-described conventional example. The holding member 4 moves in a direction away from the projecting portion 3 by being overlapped with each other, but is surely prevented, so that there is no problem that the adjusted angle changes, and a good walking can always be performed. Become.

  A specific embodiment of the present invention will be described with reference to the drawings.

  In this embodiment, an upper structure portion 1 (socket portion) to be attached to a body (thigh cut end portion of a cut leg) and a lower portion connected to the upper structure portion 1 and having a grounding portion 2a (foot portion) at a lower end portion. This is a prosthetic leg (femoral prosthesis) composed of the side structure part 2 (lower leg prosthesis). A bending / extending portion 7 having a well-known structure that functions as a knee joint that enables bending / extension movement is provided on the upper portion of the lower structure portion 2. Reference numeral 8 denotes a cylinder device.

  In the present embodiment, the upper structure portion 1 and the lower structure portion 2 are connected through a connection structure with an angle adjustment function.

  Specifically, this connection structure includes a protrusion 3 provided on the upper portion of the lower structure 2, a ring member 5 connected to the protrusion 3, and a ring member provided on the lower portion of the upper structure 1. It is comprised by the fitting connection part 6 fitted and connected to 5. FIG. Alternatively, the upper structure portion 1 may be provided with the protruding portion 3, while the lower structure portion 2 may be provided with the fitting connection portion 6.

  As shown in FIG. 2, the projecting portion 3 is an appropriate metal quadrangular prism-shaped body projecting on the upper surface of the bending portion 7 provided in the lower structure portion 2.

  The protruding portion 3 is formed to have a larger diameter on the upper end side so that each of the four peripheral surfaces becomes a tapered surface 3a.

  By providing the taper surface 3a, the tip surface of the clamping member 4 is as much as possible when the peripheral surface of the projecting portion 3 is a simple vertical surface when clamped by the clamping member 4 described later. Since the contact can be achieved, stable and good angle adjustment can be performed at all times, and the protrusion 3 can be prevented from coming off.

  The ring member 5 is formed of an appropriate metal member as shown in FIG. 2, and is configured so that the above-described protruding portion 3 can be arranged and surrounded in the ring hole 5a.

  Further, a screw groove 5c into which the fitting coupling portion 6 is screwed is formed on the outer peripheral surface of the ring member 5, and a through hole 5b described later is opened on the outer peripheral surface where the screw groove 5c is formed. Has been.

  The ring member 5 is formed with four through holes 5 b formed at equal intervals. The through holes 5 b are provided so as to open to the inner surface of the ring hole 5 a and the outer peripheral surface of the ring member 5. It has been.

  As shown in FIG. 3, each through hole 5 b is provided in an inclined state so that the inner opening is positioned higher than the outer opening. The inclination angle of each through-hole 5 b is set to an angle at which a tip portion 4 a of a clamping member 4 described later comes into surface contact with the tapered surface 3 a of the projecting portion 3.

  Moreover, the clamping member 4 is screwed by each through-hole 5b.

  The clamping member 4 is a screw rod body formed of an appropriate metal member as shown in FIG. 2, and the projecting portion 3 is attached to the ring member 5 in a state where the clamping member 4 is screwed to the ring member 5. In this state, the ring member 5 can be connected to the projecting portion 3 by sandwiching the projecting portion 3 in the ring hole 5a between the tip portions 4a of the holding members 4.

  The structure in which the ring member 5 is connected to the projecting portion 3 via the pinching member 4 exhibits an angle adjusting function, so that the upper structure portion 1 and the lower structure portion 2 are connected at an optimum angle. The projecting portion 3 is arranged at an optimum angle with respect to the ring member 5, and in this state, each clamping member 4 is projected by an appropriate amount to sandwich the projecting portion 3, thereby lowering the upper structure portion 1. The side structure 2 can be connected at a desired angle (see FIGS. 3 and 4). At this time, the base end portion of the clamping member 4 protruding from the outer opening of the through hole 5 b is cut out, and the cut surface is cut off so as to be flush with the outer peripheral surface of the ring member 5.

  Therefore, when the below-described fitting connecting portion 6 is fitted and connected to the ring member 5 in this state, the base end portion 4b of each clamping member 4 is supported by the fitting connecting portion 6 in a retaining state. 4 is held at a predetermined position.

  The clamping member 4 is not limited to a structure that is screwed into the through hole 5b, but may be a structure that is press-fitted and locked, but any structure that can be detached is desirable.

  The fitting connection portion 6 is an annular body formed of an appropriate metal member as illustrated in FIG. 2, and is provided at the lower portion of the upper structure portion 1.

  Further, a screw groove 6a is formed in the inner hole of the fitting connection portion 6, and is configured to be screwed and connected to the ring member 5 described above.

  Further, the fitted connecting portion 6 has a slit portion 6b formed at a predetermined location so that the diameter can be reduced, and a fastening member 9 for fastening the slit portion 6b is provided between the opposing ends of the slit portion 6b. It has been.

  Therefore, after the fitting connection portion 6 is screwed to the ring member 5 to be fitted and connected, the fastening member 9 is tightened to narrow the interval between the slit portions 6b, thereby fitting the fitting connection portion 6 to the ring member 5. Thus, a solid connection state can be obtained.

  Since the present embodiment is configured as described above, when the upper structure portion 1 and the lower structure portion 2 are connected, the ring member 5 is connected to the protruding portion 3 provided in the lower structure portion 2, and this The fitting connection portion 6 provided in the upper structure portion 1 is fitted on the ring member 5 and screwed and connected.

  The ring member 5 is connected to the projecting portion 3 by arranging the projecting portion 3 in the ring member 5 and, in this state, the projecting portion 3 in the ring hole 5a by the clamping member 4 projecting in the ring hole 5a. It is done by pinching.

  At this time, the projection 3 is placed in the ring member 5 at an optimum angle so that the body is optimally worn (the upper structure 1 and the lower structure 2 are connected at an optimum angle). In this state, each holding member 4 is screwed to protrude by an appropriate amount to hold the projecting portion 3 so that the lower structure portion 2 fits the body with respect to the upper structure portion 1. Can be connected in a state. The base end portion 4b of the clamping member 4 protruding from the through hole 5b of the ring member 5 is cut out so as to be flush with the outer peripheral surface 5b of the ring member 5.

  Therefore, the optimal wearing state which can walk favorably is obtained.

  After that, when adjustment becomes necessary again, the connection between the upper structure portion 1 and the lower structure portion 2 is released (the connection of the fitting connection portion 6 to the ring member 5 is released, and The connection of the upper structure part 1 and the lower structure part 2 is performed while the adjustment described above is performed again by changing the clamping member 4 to a new one (with an adjustable length). I do.

  Therefore, according to the present embodiment, when the fitted connection portion 6 provided in the upper structure portion 1 is fitted and connected to the ring member 5, the fitted end portion 4 b of the holding member 4 is supported by the fitted connection portion 6. Since the holding member 4 is configured to be held at a predetermined position, a portion for fitting and connecting the fitting connection portion 6 is not provided separately from the portion of the ring member 5 where the holding member 4 is provided. The thickness of the connection structure between the upper structure portion 1 and the lower structure portion 2 is only the thickness of the ring member 5 (fitted connection portion 6). There is no problem that the balance of the legs becomes worse.

  Further, since the present embodiment is configured to support the proximal end portion 4b of the clamping member 4 by the fitted coupling portion 6 as described above and hold the clamping member 4 in a predetermined position, unlike the above-described conventional example, By repeated use, the clamping member 4 is reliably prevented from moving in the sinking direction, so that the problem that the adjusted angle changes does not occur, and good walking can always be performed.

  Further, in this embodiment, a screw groove 5c into which the fitting connecting portion 6 is screwed is formed on the outer peripheral surface of the ring member 5, and the clamping member 4 is inserted into the outer peripheral surface on which the screw groove 5c is formed. Since the through-hole 5b that opens is configured to open, a configuration in which the base end portion 4b of the clamping member 4 is supported by the fitted connecting portion 6 and the clamping member 4 is held in a predetermined position can be obtained simply and reliably. It will be.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

It is use condition explanatory drawing of a present Example. It is a disassembled perspective view which shows a present Example. It is sectional drawing of the principal part which concerns on a present Example. It is sectional drawing of the principal part which concerns on a present Example. It is sectional drawing of the principal part which concerns on a prior art example. It is sectional drawing of the principal part which concerns on a prior art example.

DESCRIPTION OF SYMBOLS 1 Upper structure part 2 Lower structure part 2a Grounding part 3 Protruding part 4 Clamping member 4b Base end part 5 Ring member 5a Ring hole 5b Through-hole 5c Screw groove 6 Fit connection part

Claims (4)

A prosthetic leg comprising an upper structure part to be attached to the body and a lower structure part connected to the upper structure part and having a grounding part at a lower end, and either the lower structure part or the upper structure part And a fitting connection portion is provided on the other side. A ring member is fitted into the fitting connection portion, and the thickness of the connection structure between the upper structure portion and the lower structure portion is determined by the thickness of the covered structure. It is comprised so that it may become the thickness of a fitting connection part, The said protrusion part is comprised so that it may be distribute | arranged in the ring hole of the said ring member, The clamping member which protrudes in the said ring hole in the said ring member The projecting portion in the ring hole is sandwiched by the sandwiching member, and the proximal end portion of the sandwiching member is supported by the fitting connection portion to hold the sandwiching member in a predetermined position. Prosthetic leg characterized by having been configured as follows.   The artificial leg according to claim 1, wherein the ring member is provided with a plurality of through holes, and the sandwiching member is inserted into each of the through holes.   The prosthetic foot according to any one of claims 1 and 2, wherein a protruding amount of the clamping member within the ring hole is variable.   The prosthetic foot according to any one of claims 1 to 3, wherein a screw groove into which the fitting coupling portion is screwed is formed on an outer peripheral surface of the ring member, and an outer peripheral surface on which the screw groove is formed. A prosthetic foot characterized in that the through-hole into which the clamping member is inserted is configured to open.

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