CN201168095Y - Dynamic fixator for bone joint - Google Patents

Abstract

A dynamic fixator of a bone joint, comprising: the first tight fit structure is provided with an eccentric cam; a pivoting structure, one end of which is provided with a spherical joint component, the spherical joint component is connected with one end of the first close fit structure, and the other end of which is provided with two pivoting arms; the rotating shaft structure is provided with a ball part and two shaft levers extending outwards along the axis of the ball part, and the two shaft levers are respectively connected with two pivoting arms of the pivoting structure; one end of the second close fit structure is provided with a first fixed arm and a second fixed arm which are pivoted with the ball part of the rotating shaft structure; wherein the eccentric cam abuts against the ball joint component to provide a two-stage fixed adjusting mechanism.

Description

Dynamic Fixator for Bone Joints

technical field

The utility model relates to a dynamic fixator for bone joints, in particular to an external fixator for bone joints with the function of arthrodiatasis.

Background technique

Bones are an important support for the human body, but in the event of an accident, the relative position between the bones and the normal state will be deviated, and even fractures may occur; or in daily life, joint diseases may also occur, The flexibility of the joints will be greatly reduced, and there will be discomfort and other phenomena, such as joint contractures of the fifty shoulders, elbows, knees, wrists, and fingers. These problems are clinical diseases that orthopedic surgeons often encounter. Almost any joint Injuries to or surrounding tissues may lead to the occurrence of the above-mentioned situations, and these situations will cause the loss of function in the patient's life and the defect of personal image.

Especially in the treatment of fractures, a set of external fixators can be added to the injured bone of the patient. However, the disadvantages of the external fixators in the prior art are as follows:

1. Most of the fixation devices must find the axis position of the joint in advance, such as the axis of the elbow joint or wrist joint, so if you need to use the elbow fixation device in the early stage and need to perform surgery, It is necessary to find the axis position of the user's elbow, and insert one end of a bone nail into the axis position, and the other end of the bone nail is combined with the fixing device of the elbow, but this operation has a big difficulty, because It is not easy to find the axis of the user's elbow during the operation, and the axis of the elbow is not perpendicular to the bones of the arm, and the bones of each injured person are slightly different. The axis positions of the joints are not the same, so it will increase the difficulty of the operation. However, even if the axis position of the joint has been found, there will be some deviations or even beyond the allowable range, which may cause the user After the operation, there will be discomfort and other phenomena during the movement. At this time, the user must spend extra money and time to make another adjustment.

2. The purpose of the designed mechanism of the fixation device currently used in medicine is to provide complete static fixation of the fractured bone, so as to increase the chance of bone healing at the fracture site. However, at the same time as the fracture heals, it is often because the middle joint is completely fixed for a long time, which instead leads to stiffness (Stiffness) or calcification of the joint after surgery, and postoperative rehabilitation must be performed to restore the range of motion of the joint; The rehabilitation process is long and painful, and the injured must endure this long rehabilitation process after the bone has recovered, which is really a great inconvenience to the patient. Therefore, it can be seen from the above that the above-mentioned known external fixators obviously have deficiencies in practical use, and further improvements can be made.

Therefore, the author of the present invention feels that the above-mentioned deficiencies can be improved, and Naite devoted himself to research and combined with the application of theories, and finally proposed a utility model with a reasonable design and effectively improved the above-mentioned deficiencies.

Utility model content

The main purpose of this utility model is to provide a dynamic fixator for bone joints, especially a joint external fixator with joint dynamic correction function, which can be applied to elbow joints, wrist joints or other joints, that is, it has the function of joint pulling The Arthroplasty-distracting function can reduce the contact force between joints to improve the circulation of synovial fluid and soft tissue and prevent joint adhesion (Adhesion) or calcification. In addition, it automatically finds the joint rotation axis (Self-centering ) function, which can reduce the difficulty of the operation, and at the same time make the motor function of the joint recover close to normal. In addition, through the rehabilitation training and joint calcification prevention (rehabilitation-training) function of the dynamic fixator, the soft tissue around the joint of the patient receiving treatment can be rehabilitated early, so that the joint and related soft tissue can Try to restore normal function.

Another purpose of the present utility model is to provide a dynamic fixator for bone joints, which makes it easier and more convenient for the user to use, because the volume of the device of the present utility model is much smaller than that of the conventional technology, and the weight It is also significantly lighter, but it does not affect the stability of its structure, so it can reduce the burden on the user and avoid causing other hand diseases, and because of its reduced size, the cost of the device is relatively reduced. Relatively speaking, the cost that the user needs to bear for using the device can also be reduced.

Another object of the present utility model is to provide a bone joint external fixator with joint dynamic correction function. This bone joint external fixator can be mainly used in the treatment of elbow and knee joints with relatively simple movements, but for For other joints, it can also produce dynamic correction effects.

Another purpose of this utility model is to provide a bone joint external fixator with joint dynamic correction function, which can make the fracture heal stably, and the external fixation equipment used can provide a moderate degree of freedom of joint movement, so that Avoid postoperative limitation of joint range of motion.

In order to achieve the above purpose, the utility model provides a dynamic fixator for bone joints, which includes: a first tight fit structure, the first tight fit structure is provided with an eccentric cam; a pivot joint structure, the pivot joint structure One end is provided with a ball joint assembly, and the ball joint assembly is connected to one end of the first tight fitting structure, and the other end of the pivot structure has two pivot arms; a rotating shaft structure, the rotating shaft structure has a ball portion and two shafts extending outward along the axis of the ball, and the two shafts are respectively connected to the two pivot arms of the pivot structure; and a second tight fit structure, the second tight fit structure One end has a first fixed arm and a second fixed arm, and the two fixed arms are pivotally connected to the ball portion of the rotating shaft structure; wherein the eccentric cam abuts against the ball joint assembly.

The utility model also provides a dynamic fixer for bone joints, which includes: a first tight fit structure, the first tight fit structure is provided with an eccentric cam, wherein the first tight fit structure includes: a first fixed body, One end of the first fixed body is provided with a through hole transversely penetrating through the first fixed body, the eccentric cam penetrates through the through hole, and the first fixed body extends longitudinally from the front end of the through hole to form a first fixed part with threads; And a first nut, the first nut is combined with the first fixing part; a pivot structure, one end of the pivot structure is provided with a ball joint assembly, and the ball joint assembly is connected to the first tight fit structure One end, and the other end of the pivot structure has two pivot arms; wherein the eccentric cam abuts against the ball joint assembly, and each pivot arm is provided with a shaft hole, and the circumference of the shaft hole is provided with a plurality of positioning hole; a rotating shaft structure, the rotating shaft structure has a ball portion and two shafts extending outward along the axis of the ball portion, and the two shafts are respectively connected to the two pivoting arms of the pivoting structure and a second tight fit structure, one end of the second tight fit structure has a first fixed arm and a second fixed arm, and the two fixed arms are pivotally connected to the ball portion of the rotating shaft structure.

The utility model further provides a dynamic fixer for bone joints, which includes: a first tight fit structure, the first tight fit structure is provided with an eccentric cam, wherein the first tight fit structure includes: a first fixed body, One end of the first fixed body is provided with a through hole transversely penetrating through the first fixed body, the eccentric cam penetrates through the through hole, and the first fixed body extends longitudinally from the front end of the through hole to form a first fixed part with threads; And a first nut, the first nut is combined with the first fixing part; a pivot structure, one end of the pivot structure is provided with a ball joint assembly, and the ball joint assembly is connected to the first tight fit structure One end, and the other end of the pivot structure has two pivot arms; wherein the eccentric cam abuts against the ball joint assembly, and each pivot arm includes a fixed part and a joint part, and the fixed part and The joint part is respectively provided with a plurality of tooth slots; a rotating shaft structure, the rotating shaft structure has a ball part and two shafts extending outward along the axis of the ball part, and the two shafts are respectively connected to the Two pivot arms of the pivot structure; and a second tight fit structure, one end of the second tight fit structure has a first fixed arm and a second fixed arm, and the two fixed arms are pivotally connected to the rotating shaft structure of the ball.

The utility model not only has a more convenient function of self-finding the axis, but also has the function of rehabilitation to avoid the symptoms of joint calcification; moreover, the volume of the utility model is smaller than that of the conventional technology, Relatively speaking, its weight can also be significantly reduced, which can reduce the burden on the arm, and the two-stage and multi-fine-tuning functions can effectively strengthen the fixing ability and can be adjusted according to different bone shapes.

In order to truly understand the patent features and technical content of the utility model, please refer to the following detailed description and drawings of the utility model. However, the attached embodiments and drawings are only for reference and illustration, and are not used to improve the utility model. limit.

Description of drawings

Fig. 1 is a three-dimensional exploded view of a dynamic fixator for a bone joint of the present invention.

Fig. 2 is a three-dimensional exploded view of the first tight fitting structure of the present invention.

Fig. 3 is a three-dimensional exploded view of the pivot joint structure of the present invention.

Fig. 4 is a three-dimensional schematic diagram of the first embodiment of the present invention.

Fig. 5 is a diagram of the use state of the dynamic fixator for bone joints of the present invention.

Fig. 6 is a partial cross-sectional view of the pivot joint structure, the first tight fitting structure and the rotating shaft structure of the present invention.

Fig. 7 is a schematic diagram of the second embodiment of the present invention.

Fig. 7A is a partially enlarged view of the second embodiment of the present invention.

Fig. 8 is a schematic diagram of a third embodiment of the present invention.

Fig. 9 is a schematic diagram of a fourth embodiment of the present invention.

Fig. 10 is a schematic diagram of a fifth embodiment of the present invention.

Main components represent symbols

1 first tight fit structure

10 eccentric cam

11 The first fixed body

111 perforations

112 first through hole

113 second through hole

114 The first fixed part

1141 combination groove

12 first screw

13 first nut

14 first fitting

141 inner side

2 articulated structure

20 housing components

201 The second fixed part

202 first groove

21 ball joint assembly

211 Body Department

2111 first screw hole

212 ball joint

22 pivot arm

221 Fixed part

222 junction

223 positioning hole

224 shaft holes

224A cogging

224B cogging

23 second nut

231 first piercing

24 first trimmer

25 second trimmer

3 rotation axis structure

31 balls

32 shaft

321 connection part

322 chute

323 socket

324 part one

3241 perforation

325 part two

3251 slideway

3252 snap slot

4 second tight fit structure

41 second fixed body

411 third through hole

412 fourth through hole

413 long opening

42 first fixed arm

421 fourth screw hole

422 fifth screw hole

42' second fixed arm

43 fourth trimmer

44 fifth trimmer

441 plug

442 wrench

45 second screw

5 third trimmer

50 third trimmer body part

501 card tooth

502 positioning block

503 blocks

51 third screw hole

52 elastic pieces

521 Insertion Department

53 Holder

531 screw lock department

532 snap block

533 jack

6 nails

Detailed ways

Please refer to FIG. 1 to FIG. 5 , which are three-dimensional exploded views, partial exploded views and three-dimensional combined views of the dynamic fixator for bone joints of the present invention. The dynamic fixator of the bone joint includes: a first tight fit structure 1; a pivot structure 2, one end of the pivot joint structure 2 is provided with a ball joint assembly 21, and the ball joint assembly 21 is connected to the first tight fit One end of the structure 1, and the other end of the pivot structure 2 has two pivot arms 22; a rotating shaft structure 3, which is connected to the two pivot arms 22 of the pivot structure 2; a second tight fit structure 4, One end of the second tight fitting structure 4 has a first fixed arm 42 and a second fixed arm 42 ′, and the two fixed arms 42 , 42 ′ are pivotally connected to the rotating shaft structure 3 . Wherein, the first tight fitting structure 1 can be provided with at least one bone nail 6, and in this embodiment, the first tight fitting structure 1 is provided with two bone nails 6; similarly, the second tight fitting structure 4 is provided with two Support bone nail 6, and the number and form of bone nail 6 are not limited to this. In addition, the first tight fitting structure 1 is provided with an eccentric cam 10 , and a side surface of the eccentric cam 10 abuts against the ball joint assembly 21 .

Please refer to FIG. 2 , which is an exploded perspective view of the first tight fit structure of the present invention. The first tight fit structure 1 has a first fixed body 11 , a first fit piece 14 and a first nut 13 , One end of the first fixed body 11 is provided with a through hole 111 that runs through the first fixed body 11 transversely, and the eccentric cam 10 is passed through the through hole 111; the first fixed body 11 is formed by extending longitudinally from the front side of the through hole 111 A threaded first fixing portion 114, and the first nut 13 is combined with the first fixing portion 114; in addition, the first fixing portion 114 has a coupling groove 1141; the first fitting 14 includes an inner surface 141 , the inner surface 141 is used for accommodating the ball joint assembly 21 . In addition, the surface of the first fixing body 11 is provided with at least one first through hole 112, and the first through holes 112 can allow the bone nails 6 to pass through, so that one end of the bone nail 6 can be embedded in the bone (please Refer to Fig. 5) to fix the position of the bone, and the surface of the first fixing body 11 is provided with at least one second through hole 113 perpendicular to the first through hole 112, and when one end of the bone nail 6 is embedded in the bone, At least one first screw 12 can be respectively inserted into the second through holes 113 , and the first screws 12 can fix the bone screw 6 in the first fixing body 11 .

The first nut 13 can be combined with the first fixing part 114, and the ball joint assembly 21 is passed through the first nut 13, and the ball joint part 212 at the front end of the ball joint assembly 21 is accommodated in the first fixing part. part 114 of the combination groove 1141, and then the first nut 13 and the first fixing part 114 are screwed together, the ball joint assembly 21 can be rotatably connected to the first tight fitting structure 1; The first nut 13 is tightened with the first fixing portion 114 to limit the movement of the first tight fitting structure 1 . In addition, the eccentric cam 10 is passed through the through hole 111, and the side of the eccentric cam 10 abuts against the ball joint part 212, and the function of limiting the position can be achieved by the rotation of the eccentric cam 10, that is, when the eccentric cam 10 When the thicker side abuts against the ball joint part 212, the movable space of the ball joint part 212 becomes relatively smaller; The joint part 212 has a large degree of freedom.

Please refer to FIG. 3 , which is an exploded perspective view of the pivot structure of the present invention. The pivot structure 2 includes: a cylindrical housing component 20 , wherein the two pivot arms 22 are connected to the housing component 20 One end, and the other end of the accommodating component 20 is provided with a second fixing part 201 and a second nut 23, and the second nut 23 is combined with the second fixing part 201 by the second trimmer 25; and the The front end of the second nut 23 is provided with threads.

Wherein, the ball joint assembly 21 includes a body portion 211 and a ball joint portion 212; the accommodating assembly 20 has an accommodating space, and the body portion 211 is movably accommodated in the accommodating space. Therefore, the body portion 211 of the ball joint assembly 21 is accommodated in the accommodation assembly 20 of the pivot structure 2, and on the other hand, the ball joint portion 212 of the ball joint assembly 21 is engaged with the inner surface 141, and the ball The joint part 212 and the first matching part 14 are accommodated in the coupling groove 1141 of the first fixing part 114, thereby achieving the connection relationship between the first tight fitting structure 1 and the pivoting structure 2, and further by The ball joint portion 212 enables the first tight fitting structure 1 to rotate relative to the pivot structure 2 .

In addition, the surface of the accommodating component 20 has a first groove 202 extending longitudinally and penetrating into the accommodating space, and the body portion 211 of the ball joint component 21 is provided with a first screw hole 2111; and the pivot structure 2 further includes a first fine-tuning piece 24, the first fine-tuning piece 24 passes through the first groove 202 and is screwed into the first screw hole 2111, whereby when the first fine-tuning piece 24 is unscrewed, By turning the second nut 23 , the ball joint component 21 can be pushed forward or retracted backward relative to the accommodating component 20 to adjust the lateral position of the bone screws 6 . In addition, the first trimming member 24 has an indication function, that is, the user can know the forward protruding length of the ball joint assembly 21 through the position of the first trimming member 24 .

Furthermore, the surface of the second nut 23 has a first through hole 231, and the second fixing portion 201 is provided with a track, and the pivot structure 2 is further provided with a second fine-tuning member 25, and the second fine-tuning The piece 25 passes through the first through hole 231 and engages with the track. The second fine-tuning member 25 also provides locking and fine-tuning functions.

Please refer to FIG. 4 and FIG. 6 , which are schematic perspective views and partial cross-sectional views of the present utility model, wherein the two pivot arms 22 are connected to one end of the accommodating component 20 away from the ball joint portion 212; and a rotating shaft structure 3 has A ball portion 31 and two shaft rods 32 extending outward along the axis of the ball portion 31, and the two shaft rods 32 are respectively engaged and connected to the two pivot arms 22 of the pivot structure 2; The shaft rod 32 protrudes from the interlocking pivot arm to form a threaded connecting portion 321; and the dynamic fixer may further include a third fine-tuning member 5, and the third fine-tuning member 5 is provided with a third screw hole 51 , and the third screw hole 51 is screwed with the connecting portion 321 . By adjusting the tightness of the third trimmer 5, the function of whether the fixer is movable or not can be adjusted.

In addition, the second tight fitting structure 4 includes a second fixing body 41, the second fixing body 41 is integrally formed with the first fixing arm 42, and the second fixing arm 42' is separated from the second fixing body 41. forming; the first fixed arm 42 and the second fixed arm 42' are respectively provided with a fourth screw hole 421 and a fifth screw hole 422, and the second tight fitting structure 4 is further provided with a screw threaded on the fourth The fourth trimmer 43 of the screw hole 421 is screwed into the fifth trimmer 44 of the fifth screw hole 422, so that the first fixed arm 42 and the second fixed arm 42' can be locked correspondingly. The ball part 31 of the rotating shaft structure 3 is fitted, and the two fixed arms are firmly engaged with the ball part 31 by the fourth fine-tuning part 43 and the fifth fine-tuning part 44 . The two fixed arms 42 ′ are formed separately from the second fixed body 41 so that the ball portion 31 can be more easily locked between the two fixed arms, and at the same time the fourth trimming member is screwed on both sides of the ball portion 31 43 and the fifth trimming member 44 can make the overall engaging strength stronger. Similarly, the surface of the second fixing body 41 is provided with at least one third through hole 411, and each third through hole 411 can allow at least one bone nail 6 to pass through it, so that one end of the bone nail 6 can be embedded in the bone ( Please refer to Fig. 5) to fix the position of the bone, and the surface of the second fixing body 41 is provided with at least one fourth through hole 412 perpendicular to the third through hole 411, and when one end of the bone nail 6 is embedded in the bone At least one second screw 45 can be inserted into the fourth through holes 412 respectively, and the second screws 45 can fix the bone screw 6 in the second fixing body 41 .

Please refer to FIG. 7 and FIG. 7A, which is the second embodiment of the present utility model. The two pivot arms 22 of the pivot structure 2 are the same as the first embodiment, respectively composed of a fixed part 221 and a joint part 222. The fixing portion 221 and the connecting portion 222 form a shaft hole 224 , and the shaft hole 224 is used for clamping the shaft 32 extending outward from the shaft center of the ball portion 31 . However, in this embodiment, the fixed part 221 and the joint part 222 are respectively provided with a plurality of positioning holes 223, and when the fixed part 221 and the joint part 222 are combined, the positioning holes 223 will arranged around the shaft hole 224 . A shaft 32 of the rotating shaft structure 3 is provided with a plurality of longitudinal slots 323 and a transverse sliding groove 322, and the shaft 32 is also provided with a threaded screw hole. In this embodiment, the shaft 32 is provided with three such embedding grooves 321, which are only for convenience of description, and are not intended to limit the utility model.

On the other hand, a side surface of the third fine-tuning body part 50 of the third fine-tuning member 5 is provided with a plurality of locking teeth 501, and the locking teeth 501 correspond to the positioning holes 223 arranged around the shaft hole 224; The third screw hole 51 of the third trimmer 5 is different from the first embodiment, the inner surface of the third screw hole 51 is provided with a plurality of positioning blocks 502 to replace the threads in the first embodiment, the positioning blocks 502 The number and shape of the three positioning blocks 502 correspond to the slots 323 provided on the shaft 32 , that is, three positioning blocks 502 are provided on the inner surface of the third screw hole 51 in this embodiment. Meanwhile, the third fine-tuning member 5 further includes an elastic member 52 and a holding member 53 , and the holding member 53 has a screw locking portion 531 corresponding to the screw hole inside the shaft 32 . Thereby, when the two shaft rods 32 are clamped in the shaft hole 224 formed by the fixed part 221 and the joint part 222 respectively, the third fine-tuning body part 50 can be positioned in the slots 323 by the positioning blocks 502 and move on the shaft 32 through the movement of the retainer 53 through the elastic member 52 and then screwed to the shaft 32 to achieve engagement between the latch 501 and the positioning hole 223 to maintain the second 3. The stability of the trimming body part 50; and when the user pulls down the third trimming body part 50, the positioning blocks 502 are moved to the position of the chute 322, the third trimming body part 50 can use the chute 322 is rotated left and right, so that the fixer is in a relaxed state to achieve the angular rotation of the external fixator. That is to say, through the setting of the slots 323, the sliding slots 322 and the positioning blocks 502, the third fine-tuning body part 50 can be vertically displaced or horizontally rotated on the shaft 32 to achieve the function of tightening or not Adjustment.

Please refer to FIG. 8 , which is the third embodiment of the present utility model. The difference of this embodiment is that the fifth fine-tuning member 44 that locks the first fixed arm 42 and the second fixed arm 42 ′ is replaced by a latch 441 It is achieved with a trigger member 442; however, the third trimming member 5 in this embodiment has the same structure as that in the second embodiment. In detail, the latch member 441 and the trigger member 442 can cooperate with each other to achieve the function of tightening or loosening the rotating shaft structure 3 . For example, the wrench 442 is pressed against the second fixed arm 42' to tighten the rotating shaft structure 3, and if the wrench 442 is pulled to a predetermined angle, the present embodiment can 442 is pulled by 100 degrees to 150 degrees (but not used to limit the utility model), then the rotating shaft structure 3 can be loosened and the angle can be adjusted. The use of the combination of the bolt 441 and the trigger 442 can prevent the doctor from worrying that the lock is too tight or too loose, and at the same time increase the convenience of using the external fixator. In addition, in this embodiment, the pulling member 442 is arranged on the second fixed arm 42 ′; on the contrary, the latch member 441 and the fourth trimming member 43 are moved from the first fixed arm 42 to the second The direction of the fixed arm 42 ′ is locked, so as to prevent the pulling part 442 from interfering with the protruding part of the fourth trimming part 43 . Furthermore, the difference from the first embodiment is that the fourth screw hole 421 corresponding to the fourth fine-tuning member 43 in the first embodiment has no thread; in contrast, in this embodiment, the fourth screw hole The holes 421 are provided with screw threads.

Please refer to FIG. 9 , which is a fourth embodiment of the present invention. The two pivot arms 22 of the pivot structure 2 are the same as the first embodiment and are respectively composed of a fixed part 221 and a joint part 222. The fixed part 221 and the joint part 222 form a shaft hole 224. The shaft hole 224 is used for clamping the shaft 32 extending outward from the center of the ball portion 31 . But in this embodiment, the fixing portion 221 and the engaging portion 222 are respectively provided with a plurality of tooth grooves 224A and 224B. In addition, one of the shafts 32 can be divided into a first part 324 and a second part 325 ; the size of the first part 324 corresponds to the shaft hole 224 , and the first part 324 is provided with a plurality of tooth holes 3241 . The tooth holes 3241 can cooperate with the tooth grooves 224A and 224B to form a plurality of receiving grooves. Furthermore, the end of the second portion 325 away from the ball portion 31 is provided with a sliding track 3251 and a plurality of engaging grooves 3252 .

In addition, one side of the third fine-tuning body part 50 is provided with a plurality of clamping blocks 503, and the number and size of the clamping blocks 503 correspond to the receiving slots. In this embodiment, for the convenience of description, these There are two locking blocks 503 and two accommodating slots, but this does not limit the present invention. And the other side of the third trimming body part 50 is provided with a fixing hole (not shown).

Furthermore, the holder 53 is different from the second embodiment. In this embodiment, the holding member 53 is provided with a perforation, and an engaging block 532 is provided on the inner surface of the perforating hole, and the appearance size of the engaging block 532 is corresponding to the slideway 3251 and the engaging grooves 3252; and the holder 53 is further provided with an insertion hole 533. Similarly. An elastic member 52 is provided between the third fine-tuning body part 50 and the holding member 53; however, in this embodiment, an insertion portion 521 is provided at both ends of the elastic member 52, and the two insertion portions 521 can be respectively inserted To the fixing hole (not shown) of the third fine-tuning body part 50 and the insertion hole 531 of the holder 53 . Thereby, when the shaft 32 passes through the third fine-tuning body part 50, the blocks 503 can be engaged in the accommodation groove formed by the tooth holes 3241 and the tooth grooves 224A and 224B; on the other hand , the engaging block 533 of the holding member 53 passes through the slideway 3251 , and rotates left and right so that the engaging block 532 engages in one of the engaging grooves 3252 . And through the elastic member 52 disposed between the third fine-adjustment body portion 50 and the holding member 53 , the third fine-adjustment body portion 50 is tightly pushed against the pivot arm 22 . The position of the elastic member 52 is stably fixed by inserting the insertion portion 521 into the insertion hole (not shown) of the third fine-tuning body portion 50 and the insertion hole 533 of the holding member 53 . In addition, in this embodiment, the locking direction of the fourth trimming member 43 and the fifth trimming member 44 is different from that of the above-mentioned other embodiments, so that the user can adjust the locking direction according to the different implementations (please refer to Fig. 10 screw lock direction).

Please refer to FIG. 10 , which is a fifth embodiment of the present invention. Same as the third embodiment, the fifth trimming member 44 is realized by using a latch 441 and a pulling member 442' instead. However, the difference from the third embodiment is that since the inserting direction of the fourth trimming member 43 and the plug member 441 is different from that of the third embodiment, the pulling member 442 ′ is located at the same position as the protruding part of the fourth trimming member 43 . side, so the pulling member 442 ′ is smaller than the pulling member 442 of the third embodiment to avoid interference between the two.

On the other hand, the second fixing body 41 defines an elongated opening 413 instead of the plurality of third through holes 411 in the previous embodiment, so that the position of the bone screw can be adjusted freely. However, the third fine-tuning member 5 in this embodiment is the same as that in the fourth embodiment, and will not be repeated here.

Hereby summarize the characteristics of the utility model as follows:

1. This utility model has a ball joint that can be adjusted in two stages and has multiple fine-tuning functions. Since the human body is very complex and has variable factors, that is, there may be very slight differences in the bones of each patient, but In the restoration process, these small differences must be considered in order to optimize the restoration results. Therefore, the ball joint of the utility model is specially designed to have a two-stage and multi-fine-tuning function in consideration of this requirement. The operation steps of the external fixator for adjusting the function are as follows. First, use the first trimmer 24 to roughly determine the extension length of the ball joint, and then use the ball joint to adjust the first tight fitting structure 1 to a position parallel to the patient's bone; A nut 13 performs the first-stage limiting action, and then uses the eccentric cam 10 to limit the ball joint portion 212 to achieve the second-stage fixation, and then tightens the second nut 23, the first trimmer 24 and the second Two fine-tuning parts 25 can reach firm effect. In addition to providing a two-stage adjustable function, the eccentric cam 10 further presses against the surface of the ball raft of the ball joint with the first nut 13 to achieve better fixation of the retainer.

2. The utility model utilizes the two pivoting arms 22 at one end of the pivoting structure 2 and the rotating shaft structure 3 to cooperate with the two fixed arms of the second tightly fitting structure 4 to achieve a universal joint with multi-angle rotation function. This universal joint can be Utilize the tightening degrees of the third trimmer 5 , the fourth trimmer 43 and the fifth trimmer 44 to adjust the mobility of the universal joint angle, so that the fixer can be smoothly adjusted to an angle parallel to the patient's bone. It is worth mentioning that one of the fixed arms of the second tight fit structure 4 is not integrally formed with the body of the second tight fit structure 4, but the fixed arms are formed separately. The ball part 31 of the shaft structure 3 is relatively easy to engage and can avoid damage to the structure of the fixture body due to improper force application; Fixing capacity using one screw.

3. The volume of the device of the present invention is much smaller than that of the prior art, and the weight is also reduced a lot. Therefore, the device of the present invention can reduce the burden on the user's arm when using it, and can avoid causing other different problems. symptom.

4. The utility model processes the third trimmer 5 into a screw hole, and cooperates with the threaded shaft rod 32 of the rotating shaft structure 3, so as to improve the conventionally known difficulty that the shaft rod 32 is thinner and difficult to process. Further solve the problem that the conventional shaft rod 32 is easy to be damaged due to excessive force.

5. The utility model has the function of rehabilitation, wherein the fourth trimmer 43 and the fifth trimmer 44 can adjust the degree of tightness between the two fixed arms 42, 42' and the ball portion 31 between the two fixed arms to achieve Controlling the resistance when rotating between the pivoting structure 2 and the second tight fitting structure 4, the fourth fine-tuning member 43 and the fifth fine-tuning member 44 can be properly adjusted according to different rehabilitation conditions of patients; that is, When the patient's bones are fused to a certain stage, the above fine-tuning parts can be slightly loosened, so that the patient's joints can swing in a simple, small angle, improve the circulation of joint synovial fluid and prevent joint adhesion or calcification. By adjusting the tightness of the fourth trimmer 43 and the fifth trimmer 44, the ball portion 31 located between the fourth trimmer 43 and the fifth trimmer 44 has different resistances, and the ball 31 It also provides multi-directional angles between the pivotal joint structure 2 and the second tight fitting structure 4, so that patients can turn their arms appropriately according to different recovery situations of each individual, which can not only be used to rehabilitate the patient's muscular endurance, In the non-action situation, it still provides appropriate resistance to maintain the correct posture of the arm. Through the rehabilitation training function of the fixer, the soft tissues around the patient's joints can receive rehabilitation as soon as possible, so that the joints and related The soft tissue can restore normal function as far as possible.

However, the above descriptions are only preferred embodiments of the present utility model, and therefore do not limit the patent scope of the present utility model. Therefore, all equivalent technical changes made by using the description and drawings of the utility model should be included in this document. Within the scope of utility models, it is agreed to Chen Ming.

Claims (35)

1, a kind of osteoarticular dynamic fixing device is characterized in that, comprising:

One first tight fit structure, this first tight fit structure is provided with an eccentric cam;

One pin-jointed structure, an end of this pin-jointed structure is provided with a ball joint assembly, and this ball joint assembly is linked to an end of this first tight fit structure, and the other end of this pin-jointed structure has two driving arms; Wherein, this eccentric cam is resisted against this ball joint assembly,

One revolute axes configuration, this revolute axes configuration have a bulb and two along the outward extending axostylus axostyle in the axle center in this bulb, and this two axostylus axostyle is connected to two driving arms of this pin-jointed structure; And

One second tight fit structure, an end of this second tight fit structure have one first fixed arm and one second fixed arm, and this two fixed arm is articulated in the bulb of this revolute axes configuration.

2, osteoarticular dynamic fixing device as claimed in claim 1, it is characterized in that: this first tight fit structure comprises: one first fixed body, one end of this first fixed body is provided with a perforation that laterally runs through this first fixed body, this eccentric cam is arranged in this perforation, and this first fixed body has first fixed part of screw thread from this perforation front end longitudinal extension formation one; And one first nut, this first nut combines with first fixed part.

3, osteoarticular dynamic fixing device as claimed in claim 2 is characterized in that: this first fixed body surface is provided with at least one first open-work; And at least one and orthogonal second open-work of these first open-works; And this first fixed part is provided with one in order to ccontaining this ball joint combination of components groove.

4, osteoarticular dynamic fixing device as claimed in claim 1, it is characterized in that: this pin-jointed structure comprises: a columniform ccontaining assembly, this ccontaining assembly has an accommodation space, and this two driving arm is connected in an end of this ccontaining assembly, and the other end of this ccontaining assembly is provided with one second fixed part; And one second nut, this second nut is incorporated into this second fixed part.

5, osteoarticular dynamic fixing device as claimed in claim 4 is characterized in that: this ball joint assembly comprises a body and a ball-joint portion, and this body is placed in this accommodation space movably.

6, osteoarticular dynamic fixing device as claimed in claim 5, it is characterized in that: this pin-jointed structure further comprises one first trimming piece, wherein this ccontaining assembly surface has a longitudinal extension and penetrates into first groove of this accommodation space, and the body of this ball joint assembly is provided with one first screw; And this first trimming piece is arranged in this first groove and be screwed with this first screw.

7, osteoarticular dynamic fixing device as claimed in claim 6, it is characterized in that: this pin-jointed structure further comprises one second trimming piece, wherein this second nut is provided with one first perforation, and this second fixed part is provided with a track, and this second trimming piece is arranged in this first perforation and fastens with this track.

8, osteoarticular dynamic fixing device as claimed in claim 1, it is characterized in that: further comprise one the 3rd trimming piece, the 3rd trimming piece is provided with one the 3rd screw, wherein an axostylus axostyle of this revolute axes configuration driving arm that protrudes this engaging forms a connecting portion with screw thread, and the 3rd screw and this connecting portion are screwed.

9, osteoarticular dynamic fixing device as claimed in claim 1, it is characterized in that: this second tight fit structure is provided with one second fixed body, this second fixed body and this first fixed arm are one-body molded, and this first fixed arm and this second fixed arm are respectively equipped with one the 4th screw and one the 5th screw.

10, osteoarticular dynamic fixing device as claimed in claim 9 is characterized in that: this second tight fit structure further is provided with the 5th trimming piece that the 4th trimming piece and that is arranged in these grade in an imperial examination four screws is arranged in these grade in an imperial examination five screws.

11, osteoarticular dynamic fixing device as claimed in claim 9 is characterized in that: this second fixed arm separates molding with this second fixed body.

12, osteoarticular dynamic fixing device as claimed in claim 9 is characterized in that: this second fixed body surface is provided with at least one the 3rd open-work; And at least one and orthogonal the 4th open-work of these first open-works.

13, a kind of osteoarticular dynamic fixing device is characterized in that, comprising:

One first tight fit structure, this first tight fit structure is provided with an eccentric cam, wherein this first tight fit structure comprises: one first fixed body, one end of this first fixed body is provided with a perforation that laterally runs through this first fixed body, this eccentric cam is arranged in this perforation, and this first fixed body has first fixed part of screw thread from this perforation front end longitudinal extension formation one; And one first nut, this first nut combines with first fixed part;

One pin-jointed structure, an end of this pin-jointed structure is provided with a ball joint assembly, and this ball joint assembly is linked to an end of this first tight fit structure, and the other end of this pin-jointed structure has two driving arms; Wherein this eccentric cam is resisted against this ball joint assembly, and each driving arm is provided with an axis hole, and the circumference of this axis hole is provided with a plurality of locating holes;

One revolute axes configuration, this revolute axes configuration have a bulb and two along the outward extending axostylus axostyle in the axle center in this bulb, and this two axostylus axostyle is connected to two driving arms of this pin-jointed structure; And

One second tight fit structure, an end of this second tight fit structure have one first fixed arm and one second fixed arm, and this two fixed arm is articulated in the bulb of this revolute axes configuration.

14, osteoarticular dynamic fixing device as claimed in claim 13 is characterized in that: an axostylus axostyle of this revolute axes configuration is provided with a plurality of caulking grooves and a chute.

15, osteoarticular dynamic fixing device as claimed in claim 14 is characterized in that: further comprise one the 3rd trimming piece, wherein the 3rd trimming piece comprises one the 3rd fine setting body, an elastic component and a retaining piece.

16, osteoarticular dynamic fixing device as claimed in claim 15, it is characterized in that: the 3rd fine setting body is provided with one the 3rd screw, the 3rd screw medial surface is provided with a plurality of locating pieces corresponding to these caulking grooves, and a side of the 3rd fine setting body is provided with a plurality of latches corresponding to these locating holes.

17, osteoarticular dynamic fixing device as claimed in claim 16 is characterized in that: this retaining piece screw lock is in this axostylus axostyle, and this elastic component is resisted against the 3rd fine setting body and this retaining piece respectively.

18, osteoarticular dynamic fixing device as claimed in claim 17, it is characterized in that: this second tight fit structure is provided with one second fixed body, this second fixed body and this first fixed arm are one-body molded, and this first fixed arm and this second fixed arm are respectively equipped with one the 4th screw and one the 5th screw.

19, osteoarticular dynamic fixing device as claimed in claim 18 is characterized in that: this second tight fit structure further is provided with a pin member and the pulling piece that cooperates with this pin member that the 4th trimming piece and that is arranged in these grade in an imperial examination four screws is arranged in these grade in an imperial examination five screws.

20, osteoarticular dynamic fixing device as claimed in claim 13 is characterized in that: this ball joint assembly comprises a body and a ball-joint portion, and this body is placed in this accommodation space movably.

21, osteoarticular dynamic fixing device as claimed in claim 20, it is characterized in that: this pin-jointed structure further comprises one first trimming piece, wherein this ccontaining assembly surface has a longitudinal extension and penetrates into first groove of this accommodation space, and the body of this ball joint assembly is provided with one first screw; And this first trimming piece is arranged in this first groove and be screwed with this first screw.

22, osteoarticular dynamic fixing device as claimed in claim 21, it is characterized in that: this pin-jointed structure further comprises one second trimming piece, wherein this second nut is provided with one first perforation, and this second fixed part is provided with a track, and this second trimming piece is arranged in this first perforation and fastens with this track.

23, a kind of osteoarticular dynamic fixing device is characterized in that, comprising:

One first tight fit structure, this first tight fit structure is provided with an eccentric cam, wherein this first tight fit structure comprises: one first fixed body, one end of this first fixed body is provided with a perforation that laterally runs through this first fixed body, this eccentric cam is arranged in this perforation, and this first fixed body has first fixed part of screw thread from this perforation front end longitudinal extension formation one; And one first nut, this first nut combines with first fixed part;

One pin-jointed structure, an end of this pin-jointed structure is provided with a ball joint assembly, and this ball joint assembly is linked to an end of this first tight fit structure, and the other end of this pin-jointed structure has two driving arms; Wherein this eccentric cam is resisted against this ball joint assembly, and each driving arm comprises a Fixed Division and a junction surface, and this Fixed Division and this junction surface are provided with a plurality of teeth groove respectively;

One revolute axes configuration, this revolute axes configuration have a bulb and two along the outward extending axostylus axostyle in the axle center in this bulb, and this two axostylus axostyle is connected to two driving arms of this pin-jointed structure; And

One second tight fit structure, an end of this second tight fit structure have one first fixed arm and one second fixed arm, and this two fixed arm is articulated in the bulb of this revolute axes configuration.

24, osteoarticular dynamic fixing device as claimed in claim 23, it is characterized in that: an axostylus axostyle of this revolute axes configuration comprises a first and a second portion, and this first is provided with a plurality of perforations corresponding to these teeth groove, and a perforation wherein cooperates formation one storage tank with a teeth groove wherein.

25, osteoarticular dynamic fixing device as claimed in claim 24, it is characterized in that: this second portion is provided with a slideway and a plurality of slot.

26, osteoarticular dynamic fixing device as claimed in claim 25 is characterized in that: further comprise one the 3rd trimming piece, wherein the 3rd trimming piece comprises one the 3rd fine setting body, an elastic component and a retaining piece.

27, osteoarticular dynamic fixing device as claimed in claim 26 is characterized in that: a side of the 3rd fine setting body is provided with a plurality of fixture blocks corresponding to these storage tanks, and the another side of the 3rd fine setting body is provided with a fixing hole.

28, osteoarticular dynamic fixing device as claimed in claim 27, it is characterized in that: this retaining piece is provided with a perforation, and the medial surface of this perforation is provided with a clamping block corresponding to this slideway, and a side of this retaining piece is provided with a jack.

29, osteoarticular dynamic fixing device as claimed in claim 28, it is characterized in that: these fixture blocks of the 3rd fine setting body are sticked in these storage tanks, this clamping block of this retaining piece is sticked in one of them of these slots of this second portion, and this elastic component is resisted against the 3rd fine setting body and this retaining piece respectively.

30, osteoarticular dynamic fixing device as claimed in claim 29, it is characterized in that: the two ends of this elastic component are respectively equipped with an inserting part, and this two inserting part is inserted in the jack of the 3rd fine setting body and the jack of this retaining piece respectively.

31, osteoarticular dynamic fixing device as claimed in claim 30, it is characterized in that: this second tight fit structure is provided with one second fixed body, this second fixed body and this first fixed arm are one-body molded, and this first fixed arm and this second fixed arm are respectively equipped with one the 4th screw and one the 5th screw.

32, osteoarticular dynamic fixing device as claimed in claim 31 is characterized in that: this second tight fit structure further is provided with a pin member and the pulling piece that cooperates with this pin member that the 4th trimming piece and that is arranged in these grade in an imperial examination four screws is arranged in these grade in an imperial examination five screws.

33, osteoarticular dynamic fixing device as claimed in claim 23 is characterized in that: this ball joint assembly comprises a body and a ball-joint portion, and this body is placed in this accommodation space movably.

34, osteoarticular dynamic fixing device as claimed in claim 33, it is characterized in that: this pin-jointed structure further comprises one first trimming piece, wherein this ccontaining assembly surface has a longitudinal extension and penetrates into first groove of this accommodation space, and the body of this ball joint assembly is provided with one first screw; And this first trimming piece is arranged in this first groove and be screwed with this first screw.

35, osteoarticular dynamic fixing device as claimed in claim 34, it is characterized in that: this pin-jointed structure further comprises one second trimming piece, wherein this second nut is provided with one first perforation, and this second fixed part is provided with a track, and this second trimming piece is arranged in this first perforation and fastens with this track.

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