JP7199721B2 - External fixator with rehabilitation function - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement of an external fixator, and more particularly, to an external fixator with a rehabilitation function that can safely perform rehabilitation by assisting bending and stretching motions of fingers with a simple operation.

In general, when a finger is fractured, fixation pins are inserted in front of and behind the fracture site to stabilize the fracture site in the normal position, and these pins are externally fixed in the form of rods or plates. A method of treating by fixing to a vessel is known. Moreover, when the fracture site is in the vicinity of a joint (such as a PIP joint), an external fixator is attached across the joint.

Conventionally, as an external fixation device that can be worn across the joint, a device in which a plurality of splint members are connected by a hinge portion (see, for example, Patent Document 1) is known, and this type of angle adjustment is known. Since the external fixator of this type can adjust the angle between the splint members according to the angle of the joint of the fractured finger, the external fixator can be worn along the finger.

On the other hand, after the fracture of the finger has healed, rehabilitation of the finger joint is required. Conventionally, as a method of such rehabilitation, the external fixator is once removed, and then an assistant is placed on the patient's finger. Because the bending and stretching movements of the wound were performed with the aid of the hand, not only was it necessary to remove the external fixator, but it was also necessary to reapply the external fixator if the wound was not completely healed.

On the other hand, when the external skeletal fixator having a hinge portion as described in Patent Document 1 is used for finger rehabilitation in a state of being attached to the finger, the assistant is required to properly adjust the external skeletal fixator. Since it was difficult to adjust the angle by applying an appropriate force in the direction, it was easy for the patient's fingers to be overloaded, and it was difficult to use it as a rehabilitation device in terms of safety.

Utility Model Registration No. 3204228

The present invention has been made in view of the above-mentioned problems, and its object is to enable rehabilitation by assisting finger bending and stretching exercises while wearing an external fixation device. To provide an external wound fixator with a rehabilitation function, which can reduce the burden on a patient during rehabilitation work and is excellent in safety.

The means employed by the inventors to solve the above problems will be described below with reference to the accompanying drawings.

That is, the present invention is an external fixation device with a rehabilitation function for assisting bending and stretching motions of finger joints, and is a first splint having a pin mounting portion 11a for mounting a pin fixed to the bone of the finger. An external fixator comprising a member 11 and a second splint member 12 also provided with a pin mounting portion 12a, wherein the first splint member 11 and the second splint member 12 are hingedly connected. a main body 1; a bearing portion 21 fixed to the side of the first splint member 11; a nut portion 22 fixed to the side of the second splint member 12; a feed screw mechanism 2 composed of a screw member 23 having the nut portion 22 mounted in the intermediate portion; It is characterized in that the angle between the first splint member 11 and the second splint member 12 around the hinge portion 13 can be adjusted by adjusting the interval between 21 and the nut portion 22 .

Further, the first splint member 11 and the bearing portion 21 are detachably fixed by fitting means or locking means of the fixing concave portion H and the fixing convex portion C, respectively, so that the external fixator body 1 alone can be fixed. can also be used.

Further, in the feed screw mechanism 2, a bifurcated pivot portion 24 is provided outside the bearing portion 21, and the fixing convex portion C is provided on the pivot portion 24 so as to be rotatable in a direction perpendicular to the axial direction of the screw member 23. By mounting, the feed screw mechanism 2 can be easily attached and detached.

Further, with respect to the external fixator main body 1, the second splint member (12) and the nut portion (22) are further connected by fitting means or locking means of the fixing concave portion (H) and the fixing convex portion (C). The pin mounting portion 11a of the first splint member 11 and the pin mounting portion (12a) of the second splint member (12) are slidably provided in their respective longitudinal directions, and the bearing portion 21 The fixing recess H is formed in a portion that follows the sliding of the pin mounting portion 11a, and the fixing recess (H) of the nut portion (22) is formed in a portion that follows the sliding of the pin mounting portion (12a). Therefore, the feed screw mechanism 2 can be attached between the fingers of the patient without any problem even if the fingers of the patient have different lengths.

With respect to the feed screw mechanism 2, a handle 23a is provided at the end of the screw member 23 opposite to the bearing portion 21 side, so that the feed screw mechanism 2 can be easily rehabilitated by manual operation. .

In the present invention, the main body of the external fixation device is composed of two splint members and a hinge portion connecting them, and a feed screw mechanism is provided for them, and the angle between the splint members is adjusted by rotating the feed screw. By enabling the adjustment, it becomes possible to assist the bending and stretching motion of the patient's finger while the external fixator is attached to the patient's finger.

As a result, there is no need to remove or reattach the external fixator, which reduces the burden on the patient and reduces the time and effort required for preparation for rehabilitation. Moreover, according to the present invention, the load applied to the fingers can be adjusted according to the amount of force applied to rotate the feed screw mechanism and the amount of rotation.

Therefore, according to the present invention, it is possible to provide an external fixator with a rehabilitation function that enables safe and rapid rehabilitation after treatment for a patient who wears the external fixator on a fractured finger. utility value is extremely high.

1 is an exploded perspective view showing an exploded state of an external fixator with a rehabilitation function according to a first embodiment of the present invention; FIG. 1 is an exploded perspective view showing an exploded state of an external fixator with a rehabilitation function according to a first embodiment of the present invention; FIG. FIG. 4 is a state explanatory diagram showing a usage state of the external fixation device with a rehabilitation function according to the first embodiment of the present invention; FIG. 2 is an overall side view and an overall top view showing the main body of the external fixator according to the first embodiment of the present invention; It is explanatory drawing showing the sliding function of the pin mounting part in 1st embodiment of this invention. 1 is an overall side view showing a feed screw mechanism according to a first embodiment of the present invention; FIG. FIG. 4 is an explanatory diagram showing functions of a feed screw mechanism in the first embodiment of the present invention; Fig. 10 is an exploded perspective view showing an exploded state of the external fixation device with a rehabilitation function according to the second embodiment of the present invention; Fig. 10 is an exploded perspective view showing an exploded state of the external fixation device with a rehabilitation function according to the second embodiment of the present invention;

"First Embodiment"
A first embodiment of the present invention will be described with reference to FIGS. 1 to 7. FIG. In the figure, reference numeral 1 designates the main body of the external fixator, and reference numeral 2 designates the feed screw mechanism. Also, what is indicated by symbol A is an external fixation device with a rehabilitation function.

"Configuration of external fixator with rehabilitation function"
[1] Basic Configuration of External Fixation Device with Rehabilitation Function In this embodiment, as shown in FIGS. A feed screw mechanism 2 is attached to an external fixator main body 1 movably connected to constitute an external fixator A with a rehabilitation function. The first splint member 11 and the second splint member 12 of the external fixator main body 1 are provided with pin mounting portions 11a and 12a, respectively, for mounting pins fixed to finger bones.

On the other hand, regarding the feed screw mechanism 2, as shown in FIG. In this state, the nut portion 22 attached to the intermediate portion of the screw member 23 can be adjusted in the axial direction of the screw member 23 by forward and reverse rotation of the screw member 23 whose end is fixed to the bearing portion 21. (details will be described later).

As a result, the first splint member 11 of the external fixator A is fixed to the proximal phalanx of the finger, and the second splint member 12 is fixed to the middle phalanx of the finger with pins, respectively, and the nut of the feed screw mechanism 2 is tightened. By adjusting the distance between the portion 22 and the bearing portion 21, as shown in FIG. By adjusting the 12 angles and having the fingers follow it, it is possible to assist the flexion and extension of the finger joints.

[2] External fixator body
[2-1] First splint member and second splint member Next, each component of the above external fixation device A with rehabilitation function will be described. First, as to the first splint member 11 and the second splint member 12 of the external fixator A with rehabilitation function, as shown in FIGS. The first splint member 11 and the second splint member 12 are shaped as rods with a plurality of holes formed at predetermined intervals to serve as the pin mounting portions 11a and 12a. It can also be configured as

[2-2] Pin Mounting Portion As for the pin mounting portion 11a of the first splint member 11, in this embodiment, as shown in FIG. 11c, and _a fastening screw S1 and _a fastening nut N1 for tightening the holding members 11b and 11c inward. _The pin P can be firmly fixed by tightening 11c with the fastening screw S1.

On the other hand, as for the pin mounting portion 12a of the second splint member 12, as shown in FIG. The clamping members 12b and 12c _are clamped with the pin P inserted inside the clamping members 12b and 12c, similar to the _first splint member 11. Pin P can be fixed by _tightening with screw S1.

In this embodiment, as shown in FIG. 4(a), the inner surfaces of the holding members 11b and 11c of the first splint member 11 and the inner surfaces of the holding members 12b and 12c of the second splint member 12 are The ridges and troughs form a continuous zigzag concave and convex portion. A pin P is arranged between the troughs of 12b and 12c) and can be fixed so as not to shift laterally.

In this embodiment, as shown in FIG. 4( _a ), spaces for inserting the pins P are formed on both sides of the fastening screw S1 between the holding members 11b and 11c (and 12b and 12c). The pin P can be inserted into either the left or right space. Further, in this embodiment, the holding members 11b and 11c (and 12b and 12c) are made of metal parts having excellent durability, but highly elastic plastic parts can also be used.

[2-3] Slide Mechanism of Pin Mounting Portion Further, in this embodiment , as shown in FIGS. The pin mounting portion 12a of the second splint member 12 is configured to be slidable in the longitudinal direction. Specifically, for the first splint member 11, as shown in FIGS. 4(a) and 4(b), a guide hole 11d is formed through the first splint member 11 in the vertical direction. By inserting the fastening screw S1, the fastening screw S1 can be laterally moved along the guide hole 11d as shown in FIG. 5, and the position of the pin mounting portion 11a can be slid.

In this embodiment, the lower surface of the main body of the first splint member 11 and the upper surface of the pin mounting portion 11a are respectively formed with uneven portions 11e and 11f in which peaks and valleys are continuous in a zigzag shape. By tightening the fastening screw S1 while the uneven portions 11e and 11f are engaged with _each other, the position of the pin mounting portion 11a can be firmly fixed.

On the other hand, for the second splint member 12, as shown in FIGS. 4(a) and 4(b), a feed screw S2 is attached along the length direction of the _second splint member 12, and the feed screw S2 is attached to the _second splint member 12. By screwing the _upper portion of the fastening nut _N2 to the bolt portion of the pin mounting portion 12a, the fastening screw S1 is moved laterally as shown in _FIG . It is possible to slide the position of

In this embodiment, the fastening screw S1 of the _second splint member 12 is screwed to the _bottom of the fastening nut _N2 , and the fastening screw S1 pushes the fastening nut _{N2 (} or the feed screw S2) upward. The position of the pin mounting portion 12a can be firmly fixed by configuring it so that it can be tightly tightened. By adopting the slide mechanism for the pin mounting portion, the mounting position of the pin P can be adjusted according to the length of the patient's fingers.

[2-4] Hinge Part As for the hinge part 13 of the external fixator main body 1, in this embodiment, as shown in FIGS. Agaki (frictional resistance) can be adjusted. As a result, when used as the external wound fixator A with a rehabilitation function, the screw member of the hinge part 13 is loosened so that the first splint member 11 and the second splint member 12 are rotatable. When using the fixator main body 1 alone, the angle between the first splint member 11 and the second splint member 12 can be kept constant by tightening the screw member.

[2-5] Attachment and Detachment Mechanism of Feed Screw Mechanism In this embodiment, as shown in FIG. is detachably configured. Specifically, as shown in FIG. They are fixed detachably by fitting means of the fixing protrusions C. As shown in FIG.

In this embodiment, as shown in FIG. 4, the fixation recesses H of the external fixator main body 1 are provided below the pin mounting portions 11a and 12a integrally with the pin mounting portions 11a and 12a. By providing the fixing recesses H so as to follow the sliding of the pin mounting portions 11a and 12a in this way, the distance between the pin mounting portions 11a and 12a and the fitting recesses H can be kept constant, and the bending and stretching angles of the fingers during rehabilitation can be improved. can be adjusted more precisely.

As for the attachment and detachment mechanism of the external fixator main body 1 and the feed screw mechanism 2, in this embodiment, fitting means using protrusions and recesses is employed. , fastening means using a screw member and a nut member, or the like can also be employed. In addition, it is desirable that the recesses (or female threads) in the attachment/detachment mechanism (fitting means, locking means, fastening means) be formed on the side of the external fixator main body 1 so that the external fixator main body 1 can be used alone. .

[3] Feed screw mechanism
[3-1] Handle On the other hand, as shown in FIGS. A handle 23a is provided at the end of 23 opposite to the end on the bearing portion 21 side. As a result, since the position of the nut portion 22 can be moved by manually operating the handle 23a of the feed screw mechanism 2, rehabilitation can be easily performed, and excessive pain is not caused to the patient by the degree of exertion of force. You can perform finger flexion and extension exercises.

[3-2] Fixing convex portion In this embodiment, as shown in FIG. is mounted so as to be rotatable in the direction perpendicular to the axial direction of the screw member 23 . As a result, as shown in FIG. 7, the fixing convex portion C of the bearing portion 21 and the fixing convex portion C of the nut portion 22 can be aligned in the same direction.

Moreover, by adopting the above-described configuration, when the feed screw mechanism 2 is attached, the nut portion can be mounted while the fixing convex portion C of the bearing portion 21 is first attached to the fixing concave portion H of the first splint member 11. Since the fixing projection C of the nut portion 22 can be fitted to the position of the fixing recess H of the second splint member 12 while adjusting the position of 22, the feed screw mechanism for the external fixator main body 1 can be installed. The mounting work of 2 is also facilitated.

[3-3] Screw member As for the screw member 23 of the feed screw mechanism 2, the movement distance of the nut portion 22 when the screw member 23 is rotated once by the pitch of the screw thread and the force applied to the screw member 23 are as follows. You can adjust the size. Specifically, the greater the pitch of the thread, the greater the movement distance of the nut portion 22 per rotation, but the greater the force required to rotate the screw member 23 . On the other hand, the smaller the thread pitch, the smaller the moving distance of the nut portion 22 in one rotation, but the smaller the force required to rotate the screw member 23 .

"Second Embodiment"
"Detachment Mechanism of Feed Screw Mechanism"
A second embodiment of the present invention will be described with reference to FIGS. 8 and 9. FIG. In this embodiment, as shown in FIG. 8, as a mechanism for attaching and detaching the second splint member 12 and the feed screw mechanism 2, the second splint member 12 is provided with a C-shaped retaining ring portion R for fixing, and the feed screw mechanism 2, a fixing groove portion D is provided in the outer peripheral surface of the nut portion 22 in the circumferential direction.

As a result, as shown in FIG. 9, the fixing ring portion R of the second splint member 12 is fitted into the fixing groove portion D of the nut portion 22 of the feed screw mechanism 2 to mount the second splint member. The member 12 and the nut portion 22 can be detachably attached. It should be noted that locking means using this type of retaining ring can also be applied to a mechanism for attaching and detaching the first splint member 11 and the bearing portion 21 of the feed screw mechanism 2 .

Although the present invention is generally configured as described above, the present invention is not limited to the illustrated embodiments, and various modifications are possible within the scope of the claims. Materials for the external fixator main body 1 and the feed screw mechanism 2 can be appropriately selected from metal materials and plastic materials. The external fixator body 1 can also be used for the middle phalanx and the distal phalanx instead of the proximal phalanx and the middle phalanx, and both are within the technical scope of the present invention.

1 External fixator main body
11 First splint member
11a Pin mounting part
11b・11c Clamping member
11d guide hole
11e・11f Uneven part
12 Second splint member
12a Pin mounting part
12b・12c Clamping member
13 Hinge part 2 Feed screw mechanism
21 Bearing
22 Nut part
23 Screw member
23a handle
24 Pivot part P Pin C Fixing convex part H Fixing concave part S1_・S2 Fastening screw _{N1 ・ N2} Fastening nut R Retaining ring part for fixing D Groove part for fixing A External fixator with rehabilitation function

Claims (5)

An external fixator with a rehabilitation function for assisting bending and stretching of finger joints,
A first splint member (11) having a pin mounting portion (11a) for mounting a pin fixed to the finger bone, and a second splint member (12) similarly having a pin mounting portion (12a). ), and the external fixator main body (1) constructed by hinge-connecting the first splint member (11) and the second splint member (12);
A bearing portion (21) fixed to the side of the first splint member (11), a nut portion (22) fixed to the side of the second splint member (12), and the bearing portion ( a feed screw mechanism (2) composed of a screw member (23) having an end portion attached to 21) and a nut portion (22) attached to an intermediate portion;
The distance between the bearing portion (21) and the nut portion (22) is adjusted by forward and reverse rotation of the screw member (23) of the feed screw mechanism (2), thereby providing a first splint around the hinge portion (13). An external fixator with a rehabilitation function, characterized in that the angles of a member (11) and a second splint member (12) can be adjusted. The first splint member (11) and the bearing (21) are detachably fixed to each other by fitting means or locking means of the fixing concave portion (H) and the fixing convex portion (C). The external fixator with a rehabilitation function according to claim 1. In the feed screw mechanism (2), a bifurcated pivot portion (24) is provided outside the bearing portion (21), and the pivot portion (24) has a fixing convex portion (C) attached to the screw member (23). 3. The external wound fixator with rehabilitation function according to claim 2, wherein the external wound fixation device is mounted so as to be rotatable in the axial direction and the vertical direction. In the external fixator main body (1), the second splint member (12) and the nut portion (22) are further attached and detached by fitting means or locking means of the fixing concave portion (H) and the fixing convex portion (C). The pin mounting portion (11a) of the first splint member (11) and the pin mounting portion (12a) of the second splint member (12) are freely fixed and slidable in their respective longitudinal directions, and The fixing concave portion (H) of the bearing portion (21) is formed in a portion where the pin mounting portion (11a) slides, and the fixing concave portion (H) of the nut portion (22) is formed in the pin mounting portion (12a). 4. The external fixation device with a rehabilitation function according to claim 2 or 3, wherein the external fixation device with a rehabilitation function is formed at a portion that follows the slide of the . In the feed screw mechanism (2), a handle (23a) is provided at the end of the screw member (23) opposite to the end on the bearing portion (21) side. An external fixation device with a rehabilitation function according to any one of the above.

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