CN112401952B

CN112401952B - Medical spreader

Info

Publication number: CN112401952B
Application number: CN202011082711.XA
Authority: CN
Inventors: 黄孝敏
Original assignee: SHANGHAI REACH MEDICAL INSTRUMENT CO Ltd
Current assignee: SHANGHAI REACH MEDICAL INSTRUMENT CO Ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-09-28
Anticipated expiration: 2040-10-12
Also published as: CN112401952A

Abstract

The invention discloses a medical distractor, comprising: the device comprises a moving rod, a first fixed cylinder integrally connected to one end of the moving rod, a second fixed cylinder movably sleeved on the other end of the moving rod, and a first extension rod assembly and a second extension rod assembly which are respectively in threaded connection with the first fixed cylinder and the second fixed cylinder, wherein the first extension rod assembly and the second extension rod assembly are identical in structure; first extension pole subassembly include extending structure and swing joint in the fixed knot of extending structure one end constructs, extending structure include the swiveling wheel, with the fixed threaded rod of swiveling wheel, with threaded rod threaded connection's thread bush and integral type connect in keep away from the connecting seat of swiveling wheel one end on the thread bush, swing joint has fixed knot to construct on the connecting seat. According to the invention, the two rods for fixing the guide pin can extend, and the guide pin can also rotate in multiple directions, thereby being greatly convenient for distraction of bones at different angles and facilitating the operation of doctors.

Description

Medical spreader

Technical Field

The invention relates to the technical field of medical instruments, in particular to a medical distractor.

Background

At present, often use among the clinical bone surgery to strut the ware and come to bone and surrounding tissue state, increase the field of vision of operation, make things convenient for the doctor to perform the operation, also made things convenient for the doctor to perform the operation greatly, avoid using the artifical mode that struts of operation drag hook, but the ware that struts that has now generally struts the distance between two poles and can suitable adjustment, fixed motionless during the position of other directions, especially fixed guide pin position, strut in the place to different bones like this and have inconvenient place, and can not prolong at length direction, make the operation inconvenient, especially when bone slope or angle are not good, need certain space to make things convenient for the doctor to perform the operation when this.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the medical distractor, two rods for fixing the guide pin can be extended, and the guide pin can also rotate in multiple directions, so that distraction of bones at different angles is greatly facilitated, and a doctor can conveniently perform an operation. To achieve the above objects and other advantages in accordance with the present invention, there is provided a medical distractor, comprising:

the device comprises a moving rod, a first fixed cylinder integrally connected to one end of the moving rod, a second fixed cylinder movably sleeved on the other end of the moving rod, and a first extension rod assembly and a second extension rod assembly which are respectively in threaded connection with the first fixed cylinder and the second fixed cylinder, wherein the first extension rod assembly and the second extension rod assembly are identical in structure;

first extension pole subassembly include extending structure and swing joint in the fixed knot of extending structure one end constructs, extending structure include the swiveling wheel, with the fixed threaded rod of swiveling wheel, with threaded rod threaded connection's thread bush and integral type connect in the connecting seat of keeping away from swiveling wheel one end is put in the thread bush, swing joint has fixed knot to construct on the connecting seat, just the thread bush is fixed with first locating piece on being close to a port inner wall of swiveling wheel, interval phase-match between per two threads on first locating piece and the threaded rod.

Preferably, the fixed knot constructs including the fixing base, the integral type is connected with the connector on a fixing base terminal surface, has seted up a threaded connection hole on the fixing base and on the terminal surface adjacent with the connector, there is the location runner through positioning threaded rod threaded connection in the threaded connection hole, connector swing joint is on the connecting seat.

Preferably, a ball-shaped groove is formed in one end face of the fixing seat, a universal rotating ball is movably arranged in the ball-shaped groove, a connecting rod is fixedly connected to the universal rotating ball, a threaded block is fixedly connected to the connecting rod, three elastic pieces are fixedly connected to one end face of the threaded block, each elastic piece is conical along the vertical direction, a clamping rotating wheel is sleeved on each elastic piece, and the clamping rotating wheel is in threaded connection with the threaded block.

Preferably, a moving groove is formed in the middle of the moving rod, a plurality of arc-shaped clamping grooves are formed in one end face of the moving rod along the length direction, a moving hole is formed in the second fixing cylinder, the moving rod penetrates through the moving hole, and a moving rotating wheel and a limiting handle are movably connected to the second fixing cylinder.

Preferably, the movable rotating wheel comprises a rotating handle, an arc-shaped gear shaft fixed on the rotating handle and a rotating shaft fixed on the arc-shaped gear shaft, and the arc-shaped gear shaft is matched with the arc-shaped clamping groove.

Preferably, the limiting handle comprises a pulling handle, an arc-shaped groove is formed in one end face, close to the moving rod, of the pulling handle, positioning grooves are formed in two opposite inner walls of the arc-shaped groove and are matched with the arc-shaped tooth shafts, a spring is fixedly connected to the pulling handle, and one end of the spring is fixed to the moving rod.

Compared with the prior art, the invention has the beneficial effects that: the rotating wheel is rotated to drive the threaded rod to rotate, the threaded rod is fixed in the second fixing cylinder in a limiting manner, the threaded sleeve is enabled to extend out along the threaded rod in a rotating manner, so that the fixing structure can move simultaneously, the length of the threaded sleeve can be adjusted, when the guide pin is inserted into the clamping rotating wheel, the clamping rotating wheel is rotated to enable three elastic sheet openings uniformly and fixedly connected to the threaded block to gradually contract, the guide pin is clamped and fixed, after the guide pin rotates to a proper position, the positioning threaded rod is enabled to be abutted to the performance of the universal rotating ball through the rotation of the positioning rotating wheel, the universal rotating ball is fixed, the guide pin can rotate to any direction, the fixing groove can be fixed after the position is adjusted, when the pulling handle is in a normal state, the positioning groove has a pulling force effect on the pulling handle through the spring, the positioning groove is enabled to be clamped with the arc-shaped toothed shaft, and the arc-shaped toothed shaft cannot move easily, when the arc-shaped gear shaft needs to be moved, the wrench handle is moved at the moment, so that the positioning groove and the arc-shaped gear shaft are separated, and the arc-shaped gear shaft can be moved to normally rotate.

Drawings

Fig. 1 is a three-dimensional structure diagram of a medical distractor according to the present invention;

fig. 2 is a three-dimensional exploded view of an extended structure of the medical distractor according to the present invention;

FIG. 3 is a schematic three-dimensional exploded view of the fixation structure of the medical distractor according to the present invention;

fig. 4 is a three-dimensional exploded view of a second fixing cylinder of the light dispersion assembly of the medical distractor according to the present invention.

In the figure: 10. a travel bar; 20. a first fixed cylinder; 30. a second fixed cylinder; 40. a first extension bar assembly; 50. a second extension bar assembly; 60. moving the rotating wheel; 70. a limiting handle; 80. a spring; 11. a moving groove; 12. an arc-shaped clamping groove; 31. moving the hole; 41. an extension structure; 42. a fixed structure; 411. the rotating wheel; 412. a threaded rod; 413. a first positioning block; 414. a connecting seat; 415. a threaded sleeve; 421. clamping the rotating wheel; 422. a fixed seat; 423. positioning the rotating wheel; 424. positioning a threaded rod; 425. connecting a threaded hole; 426. a connector; 427. a connecting rod; 428. a universal rotary ball; 429. a thread block; 61. rotating the handle; 62. an arc-shaped gear shaft; 63. a rotating shaft; 71. positioning a groove; 72. the handle is pulled.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a medical distractor includes: the guide pin adjusting device comprises a moving rod 10, a first fixed cylinder 20 integrally connected to one end of the moving rod 10, a second fixed cylinder 30 movably sleeved on the other end of the moving rod 10, and a first extension rod assembly 40 and a second extension rod assembly 50 respectively connected to the first fixed cylinder 20 and the second fixed cylinder 30 in a threaded manner, wherein the first extension rod assembly 40 and the second extension rod assembly 50 have the same structure, after a guide pin is respectively fixed on the first extension rod assembly 40 and the second extension rod assembly 50, the distance between the first extension rod assembly 40 and the second extension rod assembly 50 is adjusted by manually moving the second fixed cylinder 30, so that the guide pin can be adjusted to the optimal distance, and the lengths of the first extension rod assembly 40 and the second extension rod assembly 50 can be adjusted according to needs; the first extension bar assembly 40 includes an extension structure 41 and a fixed structure 42 movably connected to one end of the extension structure 41, the extension structure 41 comprises a rotating wheel 411, a threaded rod 412 fixed with the rotating wheel 411, a threaded sleeve 415 in threaded connection with the threaded rod 412, and a connecting seat 414 integrally connected to one end of the threaded sleeve 415 far away from the rotating wheel 411, the connecting seat 414 is movably connected with a fixing structure 42, and a first positioning block 413 is fixed on the inner wall of one port of the threaded sleeve 415 close to the rotating wheel 411, the first positioning block 413 matches the spacing between every two threads on the threaded rod 412, when the length of the first extension rod assembly 40 needs to be adjusted, the rotating wheel 411 is rotated to rotate the threaded rod 412, and threaded rod 412 is held in place within second stationary barrel 30 with a stop so that threaded sleeve 415 extends rotationally along threaded rod 412.

Further, the fixing structure 42 includes a fixing base 422, a connecting head 426 is integrally connected to an end surface of the fixing base 422, a threaded connecting hole 425 is formed in an end surface of the fixing base 422 adjacent to the connecting head 426, a positioning rotating wheel 423 is connected to the threaded connecting hole 425 through a positioning threaded rod 424, the connecting head 426 is movably connected to the connecting base 414, a spherical groove is formed in an end surface of the fixing base 422, a universal rotating ball 428 is movably disposed in the spherical groove, a connecting rod 427 is fixedly connected to the universal rotating ball 428, a threaded block 429 is fixedly connected to the connecting rod 427, three elastic pieces 430 are uniformly and fixedly connected to an end surface of the threaded block 429, the elastic pieces 430 are tapered in a vertical direction, a clamping rotating wheel 421 is sleeved on the elastic pieces 430, the clamping rotating wheel 421 is in threaded connection with the threaded block 429, and the fixing structure 42 can rotate according to the direction requirement of the guide pin, through universal ball 428 swing joint in the ball-type groove of fixing base 422, and press from both sides tight runner 421 and be fixed in universal ball 428, insert the guide pin in pressing from both sides tight runner 42, rotate to press from both sides tight runner 42 and make three shell fragment 430 openings of even rigid coupling on the screw block 429 shrink gradually, centre gripping fixed guide pin from this, after the guide pin rotated suitable position, make positioning threaded rod 424 inconsistent with the performance of universal ball 428 through rotatory location runner 423, fix universal ball 428 from this.

Further, a shifting chute 11 has been seted up to the intermediate part of carriage release lever 10, and has seted up a plurality of arc draw-in groove 12 along length direction on the terminal surface of carriage release lever 10, a removal hole 31 has been seted up on the fixed section of thick bamboo 30 of second, it has the carriage release lever 10 to run through in the removal hole 31, and swing joint has removal swiveling wheel 60 and spacing handle 70 on the fixed section of thick bamboo 30 of second, remove swiveling wheel 60 including rotatory handle 61, be fixed in arc tooth axle 62 on the rotatory handle 61 and be fixed in the epaxial axis of rotation 63 of arc tooth, arc tooth axle 62 and arc draw-in groove 12 phase-match.

Further, the limiting handle 70 includes a pulling handle 72, an arc-shaped groove is formed on an end surface of the pulling handle 72 close to the moving rod 10, positioning grooves 71 are formed on two opposite inner walls of the arc-shaped groove, the positioning grooves 71 are matched with the arc-shaped toothed shaft 62, a spring 80 is fixedly connected to the pulling handle 72, one end of the spring 80 is fixed to the moving rod 10, when the pulling handle 72 is in a normal state, the spring 80 exerts a pulling force on the pulling handle 72, so that the positioning grooves 71 are clamped with the arc-shaped toothed shaft 62, the arc-shaped toothed shaft 62 cannot be easily moved, and when the arc-shaped toothed shaft 62 needs to be moved, the pulling handle 72 is moved at this time, so that the positioning grooves 71 are separated from the arc-shaped toothed shaft 62, and the moving arc-shaped toothed shaft 62 can be normally rotated.

The working principle is as follows: firstly, a guide pin is placed on a clamping rotating wheel 421, then the clamping rotating wheel 42 is rotated to make three elastic sheets 430 uniformly and fixedly connected on a thread block 429 gradually contract in opening, thereby clamping and fixing the guide pin, the pulling handle 72 is pulled open and moved, so that the positioning groove 71 is separated from the arc-shaped toothed shaft 62, at the moment, the movable rotating wheel 60 is rotated to drive the movable arc-shaped toothed shaft 62 to rotate, further, the second fixing cylinder 30 moves along the length direction of the moving rod 10, when the second fixing cylinder 30 moves to a proper position, the pulling handle 72 is released, under the action force of the spring 80, the positioning groove 71 is clamped with the arc-shaped toothed shaft 62, so that the arc-shaped toothed shaft 62 cannot move easily, at the moment, when the fixing structure 42 is adjusted in the length direction, the rotating wheel 411 is rotated to drive the threaded rod 412 to rotate, and the threaded rod 412 is fixed in the second fixing cylinder 30 at a limited position, so that the threaded sleeve 415 is rotated and extended along the threaded rod 412, the fixing structure 42 is driven to move, and finally the universal rotating ball 428 can be movably connected to the spherical groove of the fixing seat 422, the universal rotating ball 428 is rotated to enable the guide pin to rotate to a proper position, the positioning threaded rod 424 is enabled to be in contact with the universal rotating ball 428 through the rotating positioning rotating wheel 423, and therefore the universal rotating ball 428 is fixed.

The number of devices and the scale of the processes described herein are intended to simplify the description of the invention, and applications, modifications and variations of the invention will be apparent to those skilled in the art.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims

1. A medical distractor, comprising:

the device comprises a moving rod (10), a first fixed cylinder (20) integrally connected to one end of the moving rod (10), a second fixed cylinder (30) movably sleeved on the other end of the moving rod (10), and a first extension rod assembly (40) and a second extension rod assembly (50) which are respectively in threaded connection with the first fixed cylinder (20) and the second fixed cylinder (30), wherein the first extension rod assembly (40) and the second extension rod assembly (50) have the same structure;

the first extension rod assembly (40) comprises an extension structure (41) and a fixed structure (42) movably connected to one end of the extension structure (41), the extension structure (41) comprises a rotating wheel (411), a threaded rod (412) fixed by the rotating wheel (411), a threaded sleeve (415) in threaded connection with the threaded rod (412) and a connecting seat (414) which is arranged on the threaded sleeve (415) and far away from one end of the rotating wheel (411) in an integrated mode, the connecting seat (414) is movably connected with the fixed structure (42), a first positioning block (413) is fixed on the inner wall of one port of the threaded sleeve (415) close to the rotating wheel (411), and the distance between every two threads on the first positioning block (413) and the threaded rod (412) is matched;

the fixing structure (42) comprises a fixing seat (422), one end face of the fixing seat (422) is integrally connected with a connector (426), one end face of the fixing seat (422), which is adjacent to the connector (426), is provided with a threaded connecting hole (425), a positioning rotating wheel (423) is in threaded connection with the threaded connecting hole (425) through a positioning threaded rod (424), and the connector (426) is movably connected to the connecting seat (414);

the ball-shaped groove is formed in one end face of the fixed seat (422), a universal rotating ball (428) is movably arranged in the ball-shaped groove, a connecting rod (427) is fixedly connected onto the universal rotating ball (428), a threaded block (429) is fixedly connected onto the connecting rod (427), three elastic pieces (430) are uniformly and fixedly connected onto one end face of the threaded block (429), each elastic piece (430) is conical along the vertical direction, a clamping rotating wheel (421) is sleeved on each elastic piece (430), and the clamping rotating wheel (421) is in threaded connection with the threaded block (429).

2. The medical distractor according to claim 1, wherein a moving slot (11) is formed in the middle of the moving rod (10), a plurality of arc-shaped slots (12) are formed in one end surface of the moving rod (10) along the length direction, a moving hole (31) is formed in the second fixed cylinder (30), the moving rod (10) penetrates through the moving hole (31), and a moving rotation wheel (60) and a limit handle (70) are movably connected to the second fixed cylinder (30).

3. The medical distractor of claim 2 wherein the movable rotating wheel (60) comprises a rotating handle (61), an arc-shaped toothed shaft (62) fixed to the rotating handle (61), and a rotating shaft (63) fixed to the arc-shaped toothed shaft (62), the arc-shaped toothed shaft (62) matching with the arc-shaped slot (12).

4. The medical distractor of claim 2, wherein the limiting handle (70) comprises a pulling handle (72), an arc-shaped groove is formed in one end face of the pulling handle (72) close to the moving rod (10), positioning grooves (71) are formed in two opposite inner walls of the arc-shaped groove, the positioning grooves (71) are matched with the arc-shaped toothed shaft (62), a spring (80) is fixedly connected to the pulling handle (72), and one end of the spring (80) is fixed to the moving rod (10).