TWM474480U - Bone lengthening external fixator structure - Google Patents

Description

Bone extension external fixator structure

The present invention relates to a structure of a bone extension external fixator, in particular to a slide fixing member provided on a fixed plate, which can push the slider when the handle is rotated by the screw structure of the slide rail. The structure of a bone extension external fixator that moves.

The so-called bone extension is to cut the bone into two broken bones, but retain the soft tissue and blood vessels, and then use the special external fixation traction device to fix the two ends, and then gradually apply the pulling force to slowly pull the broken bone, continuously stimulate the body tissue, so that The truncated gap between the broken bones forms a new bone, which achieves the purpose of bone regeneration, and the length of the new bone is also increased.

The application of this kind of bone extension can improve the gait of the leg unequal, or the patient who shortens the finger can improve the appearance and function of the finger, for the work, shoes, clothes and other activities. Helped. In addition, if the forearm or lower limb is unequal and unbalanced due to tumor and congenital causes, and the adjacent joint is deformed or insufficiency, bone extension can be used to correct the deformity or insufficiency.

The other case is dwarfism. These patients are stunted to use some public facilities, or often feel that their daily lives are not free, and their legs are too short. When sitting in a chair, their feet cannot touch the ground. Stable and prone to danger. If bone extension can be used for improvement, it will be helpful for improving the quality of daily life.

At present, the fixator used for the treatment of bone elongation is Ilizarov, which is composed of a curved plate, a complete ring and a six-sided column, and is usually used 1 to 4 times a day after the operation. The translation is performed every time 0.25 mm, that is, 1 mm per day; however, the length control of the bone extension of different ages, different conditions or different parts will still be different. However, the existing bone extension external fixator is quite large in structure, and the patient feels a strong pain and a heavy burden during use, and there is room for improvement.

This creation is to consider the convenience and flexibility of the physician in use, in order to maintain the bone extension effect while reducing the burden on the patient, so the novel bone extension external fixator is proposed to be on the structure. Under the characteristics, the patient feels better quality of treatment.

The main purpose of the present invention is to provide a structure for a bone extension external fixator having a movable slider which is coupled with the rotation of the handle to generate a displacement to push the broken bone, so that there is a gap between the broken bones. Let the bone grow and then achieve the effect of bone lengthening.

The secondary purpose of the present invention is to provide a structure for a bone extension external fixator, which can be used to move the slider through the pupil of the end of the knob to facilitate the movement of the slider, and can be accurately matched under the scale. The ground pushes the broken bones day by day.

Another object of the present invention is to provide a structure of a bone extension external fixer, which is provided with slide rails on the left and right sides of the slider, so that the slider of the slider can be embedded in the sliding groove of the slide rail along the The path of the sliding groove moves without deviating or falling off, so this creation has considerable stability in use.

In order to achieve the above object, the present invention discloses a structure of a bone extension external fixer, comprising: a fixing plate having a hollow groove at the center thereof, and having a plurality of first fixing holes; and a sliding fixing member, The slat is disposed on the fixing plate, and the slat is disposed under the sliding fixing member. The sliding fixing member comprises: a first sliding rail disposed on the fixing plate and located in the vacant groove One side has a first sliding groove and a female threaded structure on the side; a second sliding rail is disposed on the fixing plate and located on the other side of the empty groove, and has a second sliding side on the side a groove and a corresponding internal thread structure of the first slide rail; at least one slider disposed between the first slide rail and the second slide rail, and received by the first sliding groove and the second sliding groove Restricted to slide over the recess, and having at least one second fixing hole penetrating therethrough; and at least one knob coupled to the slider, the surface having an external thread structure and The internal thread structure is compatible. According to the structural design, the creation can rotate the knob under the first fixing hole of the fixed portion and the second fixing hole on one of the sliders, and let the slider travel along the sliding rail to make the attached broken The bone has a gap to allow the bone to grow, so that the total length of the bone can be increased.

1‧‧‧ fixed plate
11‧‧‧ empty slot
2‧‧‧Sliding fixtures
21‧‧‧First slide rail
210‧‧‧The first sliding ditch
22‧‧‧Second rail
220‧‧‧The first sliding ditch
23‧‧‧ Slider
230‧‧‧Carmen
24‧‧‧ handle
240‧‧‧Hexagon bolt hole
31‧‧‧First fixing hole
32‧‧‧Second fixing hole
41‧‧‧ internal thread structure
42‧‧‧External thread structure
5‧‧‧ bone screw
61‧‧‧The first broken bone area
62‧‧‧Second Broken Zone
63‧‧‧Truncation zone
7‧‧‧ scale
D _L ‧‧‧Locking direction
D _R ‧‧‧Rotation direction
D _S ‧‧‧Swing direction
AB‧‧‧ section line

The first figure is a schematic structural view of a preferred embodiment of the present invention;
The second picture is a schematic cross-sectional view of the structure at the section line AB in the present creation;
The third picture: the structure diagram of the first slide rail in the creation;
The fourth picture: the system is the schematic diagram of the side structure of the handle;
Figure 5: It is a schematic diagram of the locking of the bone screw and the sliding direction of the slider during the creation of the creation; and the sixth A~D diagram: it is a schematic diagram of the effect of the creation operation.

For a better understanding and understanding of the features of the creation and the efficacies achieved, please refer to the preferred examples and detailed explanations as follows:

First, please refer to the first figure, which reveals the structural appearance of the creation, which mainly includes: a fixing plate 1, a sliding fixing member 2, a first sliding rail 21, and a second sliding rail. 22. At least one slider 23 and a knob 24. The sliding fixing member 2 is disposed on the fixing plate 1; the first sliding rail 21, the second sliding rail 22, the sliding block 23 and the knob 24 are constituent elements of the sliding fixing member 2. As shown, the first slide rail 21 and the second slide rail 22 are disposed on the fixed plate 1 and are parallel to each other; the slider 23 is disposed between the first slide rail 21 and the second slide rail 22; 24 is connected to one end of the slider 23.

In order to better present the structure of the present invention, the cross-sectional structure taken by the section line AB in the first figure refers to the second figure, which clearly shows the fixing plate 1, the sliding fixing member 2, the first sliding rail 21, and the first The relative positions of the two slide rails 22, the slider 23 and the knob 24.

When the present application is applied, the fixing plate 1 is attached to the surface of the user's body, and this portion is the portion for performing the bone extension treatment, and the physician can use the bone through the plurality of first fixing holes 31 provided in the fixing plate 1. The screws are fixed. The first fixing holes 31 are distributed on the two ends of the fixing plate 1. When used, the first fixing holes 31 on both sides are not locked at the same time, but only the locking side is locked. The first fixing hole 31. The fixing plate 1 further comprises an empty slot 11 (shown in the second figure), and a portion located at the center thereof is used to open enough space for the sliding fixture 2 located thereon to operate, that is, to allow The bone screw can penetrate.

The sliding fixing member 2 is a main body member that functions as a creative function, and is mainly constructed by symmetrical first sliding rails 21 and second sliding rails 22, both of which are disposed on the fixed plate 1 and are respectively located in the empty slot 11 One side. Please refer to the third figure, which discloses the structural feature of the first slide rail 21, which has a first sliding groove 210 and an internal thread structure 41 on the side, and the second slide rail 22 having the same outer shape has The same second sliding groove 220 (shown in the second figure) and the internal thread structure 41 are respectively disposed on opposite sides of the empty groove 11 respectively, thereby providing sufficient space for the slider 23 to be in the two Move between people.

Referring to the second figure, the two sides of the slider 23 respectively have the latches 230, and the latches 230 are respectively matched with the first sliding groove 210 and the second sliding groove 220, thereby limiting the slider 23 only It can advance or retreat on the predetermined sliding path of the combination of the first sliding groove 210 and the second sliding groove 220.

The mechanism for advancing or retracting the slider 23 comes from the knob 24 connected thereto. Please refer to the fourth figure, which is a schematic view of the side structure of the knob 24, the surface of which has an external thread structure 42 and the first rail. 21 and the internal thread structure 41 of the second slide rail 22 are matched. When the surface of the handle 24 that is in contact with the first slide rail 21 and the second slide rail 22 is threaded, the knob 24 is rotated between the slide rails. Therefore, if the user rotates the knob 24, The slide rails 23 connected thereto can be simultaneously displaced.

As shown in the foregoing disclosure, the slider 23 has at least one second fixing hole 32 penetrating up and down. Referring to the operation direction diagram of the fifth figure and the effect diagram of the sixth A to D diagram, the present invention is When applied, the bone system to which it is attached has been cut into two parts, namely the first broken bone 61 and the second broken bone 62, and the middle of the two broken bones is a sectional section 63. The present invention utilizes the principle that the epiphysis grows out of the bone, and the purpose of extending the bone under the distance between the first broken bone 61 and the second broken bone 62 can be achieved in the cross section 63 where the growth space is obtained.

The present invention first rotates the knob 24 to adjust the slider 23 to an appropriate position, and then is locked to the first broken bone 61 on one side by the bone screw 5 through the second fixing hole 32 of the slider 23, and then At the other end of the second broken bone 63, the bone screw 5 is inserted through the first fixing hole 31 on the fixing plate 1. The locking direction D _{L of the} bone screw 5 is referred to the drawing.

Through the above locking method, the creation is respectively locked on the two broken bones by two points, and the slider 23 is moved along the sliding rail structure to move relative to the fixed plate 1. That is to say, if the knob 24 is rotated in the rotation direction D _R as shown, the rotating force can be applied to the slider 23 that has been locked to the bone, and pushes it to move in the sliding direction D _S , that is, to drive The first broken bone 61 locked by the slider 23 is away from the second broken bone 62 locked by the fixed plate 1.

Referring to the first figure, in order to improve the convenience, the knob 24 has a hexagonal bolt hole 240 at the end portion, so that the physician can insert the hexagonal bolt hole 240 after using the hexagonal wrench, and simply apply the force to rotate the knob 24 . . In addition, the surface of the first slide rail 21 and the second slide rail 22 has a scale 7 which allows the physician to accurately adjust the distance of the bone extension according to the scale 7 while rotating the knob 24, in principle, once a day. 1mm is the main.

In summary, the present invention discloses in detail a structure of a bone extension external fixator, which is convenient for a physician to accurately control the progress of the bone extension program using a simple tool, and has no structural instability while pushing the slider. Concerns; in terms of both development and improvement of medical quality, in summary, this creation undoubtedly provides a structure that fully demonstrates the practical use of bone extension external fixators.

However, the above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and the variations, modifications, and modifications of the shapes, structures, features, and spirits described in the scope of the patent application. , should be included in the scope of the patent application of this creation.

1‧‧‧ fixed plate

2‧‧‧Sliding fixtures

21‧‧‧First slide rail

22‧‧‧Second rail

23‧‧‧ Slider

24‧‧‧ handle

240‧‧‧Hexagon bolt hole

31‧‧‧First fixing hole

32‧‧‧Second fixing hole

7‧‧‧ scale

AB‧‧‧ section line

Claims (7)

A structure for a bone extension external fixator comprising:
a fixing plate having a slot in the center thereof and having a plurality of first fixing holes; and a sliding fixing member disposed on the fixing plate, wherein the slot is located below the sliding fixing member The sliding fixture comprises:
a first sliding rail is disposed on the fixing plate and located on one side of the hollow groove, and has a first sliding groove and an internal thread structure on a side thereof;
a second sliding rail is disposed on the fixing plate and located on the other side of the empty slot, and has a second sliding groove on a side thereof and the internal thread structure corresponding to the first sliding rail;
At least one slider disposed between the first sliding rail and the second sliding rail, and being slidable along the empty slot by the first sliding groove and the second sliding groove, and The utility model has at least one second fixing hole penetrating up and down; and at least one knob coupled to the slider, the surface of which has an external thread structure to be engaged with the internal thread structure. The structure of the bone extension external fixator according to claim 1, wherein the handle has a hexagonal bolt hole. The structure of the bone extension external fixator according to claim 1, wherein the second fixing holes are exposed outside the first slide rail and the second slide rail. The structure of the bone extension external fixator according to claim 1, wherein the two sides of the slider respectively have a latch, and the latches are respectively associated with the first sliding groove and the second sliding The ditch fits together. The structure of the bone extension external fixator according to claim 1, wherein the first fixing holes are distributed at two ends of the fixing plate. The structure of the bone extension external fixator according to claim 1, wherein the rotation of the handle drives the slider to move along the first sliding groove and the second sliding groove. The structure of the bone extension external fixator according to claim 1, wherein the first slide rail and the surface of the second slide rail have a scale.