JP5348593B2 - Mounting structure of liner attached to stump to prosthetic socket - Google Patents

Description

  In the present invention, when the liner attached to the stump is attached to the prosthetic socket, it is easy to attach the liner to the prosthetic socket, and even if a slight deviation occurs between the liner and the stump at the time of wearing, the liner The present invention relates to a structure for attaching a liner attached to a stump capable of completing the connection between the prosthetic socket and the prosthetic socket to the prosthetic socket.

  Conventionally used prosthetic limbs can be walked by attaching a user's amputated limb to a liner, inserting the liner into a socket and fixing it with a traction belt or the like. By the way, there is an invention disclosed in Japanese Patent Application Laid-Open No. 2002-217881 as one that maintains a good coupling state in a state where a cut limb is inserted and mounted in a socket.

  In the present invention, in a state where the cut limb is mounted on the socket, the air in the socket is discharged to bring the socket into a negative pressure state, so that the cut limb does not come out of the socket. However, in the present invention, when the outer diameter of the stump is reduced during use, the negative pressure state may change, and play may occur in the stump within the socket, which may cause discomfort during mounting. is there.

  In addition, there is an invention disclosed in Japanese Patent Laid-Open No. 9-164158 as a method for maintaining a good coupling state with a socket through a liner at a stump. According to the present invention, an insertion lock pin having an annular groove is integrally attached to a bottom surface portion of a liner covering a stump, and an accommodation portion having an insertion hole into which the insertion lock pin is inserted is attached to a socket. A rubber ring that enters the annular groove is provided in the hole. A long-axis insertion bolt protruding from the liner is inserted into the insertion hole in the socket housing portion to prevent the liner from coming out of the socket due to frictional resistance between the rubber ring and the annular groove.

JP 2002-291781 A JP-A-9-164158

  By the way, when the user attaches the liner disclosed in Patent Document 1, if the insertion lock pin is not straight from the stump in the attachment state, the insertion lock pin is not attached when the liner is attached to the socket. Since it becomes difficult to insert the tip into the insertion hole of the housing portion, there is a problem that it is very troublesome and time consuming for the user to install the liner.

  Also, if the lock pin is not straight from the stump and the liner is attached to the stump and the liner bolt is loaded into the insertion hole, the insertion lock pin becomes slanted and the stump and socket If you walk for a long time, the load on the stump may increase, causing pain and peripheral circulatory disturbance.Therefore, pay careful attention when attaching the cut end to the socket. There was a problem that it was necessary.

  The present invention is intended to solve the above-described problems, and an object of the present invention is to provide a lock pin locking means on the socket side and to be integrated with a suction plate fitted and fixed to the lock pin locking means. By attaching a desorption means such as a magnet that can be desorbed to the adsorption plate to the lock pin and the bottom of the liner, the adsorption means provided at the tip of the liner is completely disconnected when the user installs the liner. It is not necessary to be located in the center, and even if there is a slight deviation, the deviation is eliminated by the suction means, so it is easy to install, and a long axis lock pin for integrating the liner and socket is a liner Because it is not formed integrally with the sleeve, it can be easily installed without taking an unreasonable posture when attaching the stump to the socket. It is to provide cents structure for mounting and.

The attachment structure of the liner attached to the stump of the present invention to the prosthetic socket is intended to achieve the above-mentioned purpose, and the means of claim 1 is a lock pin locking means attached to the lower part of the prosthetic socket 3. 4, a lock pin 6 having a groove 61 inserted into the lock pin engaging means in a lockable manner and having an adsorption plate 62 formed at the upper end, and the liner attached to the lower portion of the liner 1 is connected to the prosthetic limb socket. In the middle of the insertion into 3 , the lock pin attracting plate and the magnet 24 attracted by magnetic force are attached, and the prosthetic socket is tilted by attaching the magnet to the fixed body 12 of the liner 1 via the elastic member 23. Further, the magnet and the suction plate of the lock pin are attracted in a parallel state .

According to the second aspect of the present invention, the lock pin engaging means 4 attached to the lower portion of the prosthetic limb socket 3, the groove 51 to be inserted into the lock pin engaging means in a lockable manner are formed, and the suction plate 62 is provided at the upper end. The lock pin 6 is formed, an engagement member 26 having a ring-like groove attached to the lower portion of the liner 1, and an attachment member 62a having an O-ring 62b attached to the suction plate of the lock pin. The engagement member and the suction plate are engaged with each other by friction force by engaging the O-ring and the groove, and the engagement member is attached to the liner fixing body 12 via the elastic member 23. Thereby, even if the prosthetic limb socket is tilted, the engagement member and the attachment member maintain engagement in a parallel state .

  As described above, the present invention is provided with the lock pin locking means on the socket side, the lock pin integrated with the suction plate fitted and fixed to the lock pin locking means, and the suction plate on the bottom surface of the liner. By installing removable means, the long shaft lock pin for integrating the liner and socket is not formed integrally with the liner when the user installs the liner. It is possible to easily put on the end without taking an unreasonable posture.

  In addition, since the lock pin engaging means is a ratchet unit, when the liner is attached to the prosthetic socket, the lock pin is smoothly moved when moving downward, and conversely the upward movement is locked. It is possible to walk safely without separating the liner and prosthetic socket during walking, and the liner can be easily removed from the prosthetic socket by operating the unlocking pin when removing the liner from the prosthetic socket. Is possible.

  Further, since the member for combining the attraction plate of the lock pin and the attaching / detaching means is constructed by engaging the magnet, the suction cup or the O-ring with the groove, the structure is simple and the cost can be reduced and there is a risk of failure. There are few things.

  In addition, the magnet and the mounting member are attached to the prosthetic socket with the liner tilted by attaching the mounting member that engages with the magnet or O-ring as the detaching means, so that the magnet and the mounting member attract the lock pin. Since the parallel state with respect to the plate is maintained, the desorption means and the suction plate are firmly integrated, and the liner can be safely walked without coming out of the prosthetic socket during walking. It is what you have.

It is a partial cross section figure of the state where the liner in the attachment structure to the prosthetic socket of the liner attached to the stump according to the present invention is attached to the socket. (A) is a partial cross-sectional view showing the relationship between the magnet-type attaching / detaching means attached to the lower part of the liner and the ratchet bolt on the prosthetic socket side, and (b) is the ratchet bolt of the attaching / detaching means with the liner tilted. It is a partial cross section figure which shows the state which is in a parallel state with no head flat surface. It is a partial cross section figure of the state where the liner was inserted in the artificial limb socket in the perpendicular state. It is a partial sectional view of the state where the liner was inclined and fitted into the prosthetic socket. (A) is a partial cross-sectional view of the state where the mounting means is a suction cup, and (b) is a partial cross-sectional view of the state where the mounting means utilizes frictional resistance.

Hereinafter, an attachment structure of a liner attached to a stump according to the present invention to a prosthetic limb socket will be described with reference to the drawings.
Reference numeral 1 denotes a liner formed of a relatively soft material that is inserted by the user from the stump A1 side of the prosthesis A, and receives a stump A1 formed of synthetic resin at the lower end as shown in FIG. A receiving body 11 is formed, and a fixed body 12 having a screw hole 12a for attaching the attaching / detaching means 2 made of synthetic resin is integrally formed on the back surface side of the receiving body 11.

  Note that screw holes 12 a are formed in the fixed body 12 in the vertical direction. Further, it is formed on the upper surface side of the receiving body 11 so as to coincide with the shape of the user's stump A1, and the user's stump A1 is painful with the user wearing the artificial limb A on the liner 1. It is filled with an elastic member 13 such as silicon rubber so as not to exist.

  The detaching means 2 includes a screw fixture 21 in which a male screw 21a is formed which is screwed into the screw hole 12a of the fixing body 12 of the liner 1 and a female screw 21b is formed in the center in the axial direction. A bolt 22 to be screwed into the female screw 21b of the fixing tool 21, a ring-shaped elastic tool 23 formed of an elastic member such as sponge, and a hole 24b in which a recess 24a is formed on the lower surface and the bolt 22 is inserted. The detachable means 2 is assembled by inserting the bolt 22 from the concave portion 24a side of the magnet 24 and screwing and fixing the bolt 22 to the female screw 21b of the fixing tool 21 via the elastic tool 21. ing. Reference numeral 24 c denotes an elastic member interposed between the head of the bolt 22 and the recess 24 a of the magnet 24.

  Next, the structure of the prosthetic socket 3 will be described. The prosthetic socket 3 is formed of a relatively hard resin into which the liner 1 is inserted, and a lower opening outer peripheral surface is formed of a flange 31a of a metal receiving member 31. The liner is embedded and integrated by molding. A hole 31 b is formed on the bottom surface of the receiving member 31.

  Lock pin locking means, for example, a known ratchet unit is integrally attached to the back side of the receiving member 31. Hereinafter, the bolt locking means will be described as the ratchet unit 4. A known artificial limb function body 5 is attached to the ratchet unit 4. Reference numeral 6 denotes a lock pin in which a large number of ring-shaped grooves 61 are formed along the longitudinal direction, and a disk-shaped suction plate 62 is formed at the upper end. The lock pin 6 is made of a magnetic material.

  The ratchet unit 4 is, for example, a shuttle lock pyramid 6A20 = 10 manufactured by Otto Bock Japan Co., Ltd. When the lock pin 6 is inserted, the ratchet unit 4 can be moved downward by the ratchet unit. The movement to the position is engaged and locked in the groove 61 of the lock pin 6, and the lock is released by operating the lock release pin 41.

Next, the operation | movement with which the user mounts | wears with the prosthetic socket 3 after mounting the liner 1 to a stump about an above described structure is demonstrated.
First, the user inserts the lower limb stump from the opening of the liner 1 toward the stump A1 and fixes the stump to the liner 1. Next, the liner 1 is inserted from the opening of the prosthetic socket 3. At this time, the tip end portion of the lock pin 6 is inserted into the ratchet unit 4 in advance, and the downward movement is free, but the upward movement is locked.

  When the liner 1 is inserted into the prosthetic limb socket 3, the magnet 24 in the detaching means 2 is magnetically attracted to the attracting plate 62 of the lock pin 6, and the lock pin 6 is further lowered in the integrated state. Is in a fixed state at a position where it is in close contact with the prosthetic socket 3 (see FIG. 3).

In this contact state has become the liner 1 and integral with the suction plate 62 by a strong magnetic force of the magnet 24 even if pull out from the artificial limb socket 3, and the locking pin 6 is moved upward to the ratchet unit 4 is locked and it is, can not be pulled out, therefore, the liner 1 is prevented from coming off from the artificial limb socket 3 when walking, it is possible to walk in a safe state. A neodymium magnet is effective as a magnet having a strong magnetic force.

  Next, in order to extract the liner 1 from the prosthetic limb socket 3, when the lock release pin 41 of the ratchet unit 4 is operated, the lock piece of the ratchet unit 4 becomes free, so that the engagement with the groove 61 of the lock pin 6 is performed. Since the lock pin 6 is released and is attracted to the magnet 24, the liner 1 can be pulled out from the prosthetic socket 3, and therefore the liner 1 can be pulled out together with the lock pin 6.

  It is possible to prevent the lock pin 6 from being lost by pulling the liner 1 out of the prosthetic socket 3 and then removing the lock pin 6 from the magnet 24 and inserting the lock pin 6 into the ratchet unit 4.

Incidentally, when the liner 1 is mounted inclined as shown in FIG. 2 (b) in the state mounted on the artificial limb socket 3, the magnet 24 is also in a state inclined with respect to the suction plate 62 of the lock pin 6, When the magnet 24 is attracted to the attracting plate 62 by the magnetic force, the elastic member 23 and the elastic member 24c are elastically deformed so that the magnet 24 and the attracting plate 62 are brought into a complete contact state, and the magnet 24 and the attracting plate 62 are attracted to each other. Since the force is maintained in a strong state and no load is applied to the stump, the liner 1 does not come out of the prosthetic socket 3 during walking, and no pain or peripheral circulatory disturbance occurs (FIG. 4). reference).

  In the above description, the magnet 24 is used to attract the lock pin 6 of the detaching means 2 to the suction plate 62. However, as another embodiment, a suction cup 25 is attached to the fixed body 12 as shown in FIG. The suction cup 25 and the suction plate 62 may be integrated at a vacuum level.

The attachment via an O-ring 62 b of the mounting member 62 a on the upper surface of the suction plate 62 of the locking pin 6, as shown in FIG. 5 (b), whereas the O-ring 62 b is engaged with the fixed member 12 by inserting the attachment member 62 a having a ring-shaped groove that is, mounting the engaging member 26 engages in close contact with said O-ring 62 b, may be integrated by frictional resistance.

In the above-described embodiment, the case where the ratchet unit is used as the lock pin locking means has been described. However, the lock pin 6 in the state of being attracted by the detaching means 2 provided at the lower portion of the liner 1 is the lock pin locking means. And at the position where the liner 1 is completely inserted into the prosthetic socket 3, the tip of the bolt that can be inserted into the inside from the side of the prosthetic socket 3 is engaged with the groove 61 of the lock pin 6. Various means such as a lock pin locking means for fixing the liner 1 and the prosthetic socket 3 are included.

DESCRIPTION OF SYMBOLS 1 Liner 2 Step attachment means 23 Elastic tool 24 Magnet 25 Suction cup 26 Engagement member 3 Prosthetic socket 4 Lock pin latching means (Ratchet unit)
5 Prosthetic function body

Claims (2)

A lock pin engaging means 4 attached to the lower part of the prosthetic socket 3 ; a lock pin 6 having a groove 61 inserted into the lock pin engaging means in a lockable manner and having an adsorption plate 62 formed at the upper end; ,
It is composed of a magnet 24 that is attached to the lower part of the liner 1 and that is attracted by a magnetic force while the liner is inserted into the prosthetic limb socket 3 .
The magnet is attached to the fixed body 12 of the liner 1 via the elastic member 23 so that the magnet and the suction pin of the lock pin are attracted in a parallel state even when the prosthetic socket is tilted. Mounting structure of the liner attached to the stump to the prosthetic socket. A lock pin engaging means 4 attached to the lower portion of the prosthetic socket 3; a lock pin 6 having a groove 51 inserted into the lock pin engaging means in a lockable manner and having an adsorption plate 62 formed at the upper end; ,
An engagement member 26 having a ring-shaped groove attached to the lower portion of the liner 1;
An attachment member 62a having an O-ring 62b attached to the suction plate of the lock pin,
By engaging the O-ring and the groove, the engaging member and the suction plate are engaged with each other by a frictional force, and the engaging member is attached to the liner fixing body 12 via the elastic member 23. By
A structure for attaching a liner attached to a stump to a prosthetic limb socket, wherein the engagement member and the attachment member maintain engagement in a parallel state even when the prosthetic limb socket is inclined .

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