CN218045215U - Minimally invasive small incision retractor - Google Patents

Abstract

The utility model relates to a minimally invasive small incision retractor, belonging to the technical field of medical instruments. Comprises a fixed arm and a movable arm, wherein the fixed arm is provided with a rack, the movable arm is arranged on the rack and can slide along the rack, the fixed arm and the movable arm respectively comprise a base, a connecting arm and a retracting draw hook arm; one end of each connecting arm is rotatably connected with the corresponding base, and the other end of each connecting arm is rotatably connected with the corresponding retracting hook arm; the retracting retractor arm is provided with a detachable retracting retractor; the rack is arranged on the fixed arm base, and the movable arm is arranged on the rack through the movable arm base. The utility model provides a minimally invasive small incision retractor, which avoids causing secondary injury and ensures the safety of patients.

Description

Minimally invasive small incision retractor

Technical Field

The utility model relates to a minimally invasive small incision retractor, belonging to the technical field of medical instruments.

Background

In the traditional cardiovascular surgery, a sternum middle incision is mostly adopted, a left chest back outer incision is partially adopted, along with the continuous improvement of the safety of the cardiovascular surgery, the problems of beauty of wound incisions in the surgery and the like are increasingly emphasized by people, and in recent years, minimally invasive small incision surgery is gradually favored by patients who love beauty. The minimally invasive small incision means that the length of an operation approach incision is 6-10 cm, and the incision is positioned at a relatively hidden part of the chest. The retractor is one of essential important instruments in minimally invasive small incision surgery, and is used for stretching sternum and ribs and exposing trachea and tissues in the chest.

The prior art has the following technical defects: the traditional minimally invasive small incision retractor cannot be completely attached to a retracted part during traction, is easy to slide in the operation process, and has secondary injury risk.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: overcomes the defects of the prior art, provides a minimally invasive small incision retractor, avoids secondary injury and ensures the safety of patients.

The minimally invasive small incision retractor comprises a fixed arm and a movable arm, wherein a rack is arranged on the fixed arm, the movable arm is arranged on the rack and can slide along the rack and is locked with the rack through a rack locking device, and the fixed arm and the movable arm respectively comprise a base, a connecting arm and a retracting hook arm; one end of each connecting arm is rotatably connected with the corresponding base, and the other end of each connecting arm is rotatably connected with the corresponding retracting hook arm; the retracting retractor arm is provided with a detachable retracting retractor; the rack is arranged on the fixed arm base, and the movable arm is arranged on the rack through the movable arm base.

Further, the connecting arm is arc-shaped.

Furthermore, the rack locking device is arranged on the movable arm base and comprises a self-locking claw and a return spring, the self-locking claw is hinged to the movable arm base through the middle of the self-locking claw, a through hole is formed in the movable arm base corresponding to the self-locking claw, the claw part at the front end of the self-locking claw penetrates through the through hole and is clamped on the teeth of the rack, the return spring is arranged at the rear end of the self-locking claw, and the return spring is matched with the self-locking claw to achieve locking.

Furthermore, a rotating handle assembly is arranged on the movable arm base, and comprises a rotating handle and a gear; a gear groove is formed in the movable arm base, and a gear is arranged in the gear groove, rotates along the axial direction and is meshed with the rack; the rotating handle is positioned outside the movable arm base and is connected with the gear; the gear is driven to axially rotate by the rotating handle, and then the movable arm base is driven to slide.

Furthermore, a set screw is fixed at one end corresponding to the gear, a shaft head is fixed at the other end, the shaft head and the gear are positioned through a pin shaft I, and the gear is limited from two ends through the set screw and the shaft head; the rotating handle is hinged with the shaft head through a pin shaft II.

Furthermore, the rotating handle adopts a butterfly handle; the butterfly handle is internally provided with a positioning groove, a positioning spring and a positioning steel ball are installed in the positioning groove, a circular groove is formed in the top of the shaft head corresponding to the positioning steel ball, and the positioning steel ball is pushed into the circular groove of the shaft head under the action of the positioning spring, so that the butterfly handle is kept in a vertical state.

Furthermore, a gear is provided with a pressing device on the movable arm base;

furthermore, a draw hook plug is arranged on the back of the draw hook body of the draw hook, and an annular positioning groove is arranged on the draw hook plug; a mounting hole and a drag hook positioning groove communicated with the mounting hole are formed on the retracting drag hook arm corresponding to the drag hook plug, and a drag hook positioning spring and a drag hook positioning steel ball are arranged in the drag hook positioning groove; and a draw hook plug is inserted into the mounting hole, and a draw hook positioning spring pushes the draw hook positioning steel balls into the annular positioning groove to realize the assembly of the draw hook and the draw hook arm.

Furthermore, the drawing surface of the drawing hook body of the drawing hook is provided with anti-skid teeth.

Compared with the prior art, the beneficial effects of the utility model are that:

little incision retractor of wicresoft, rational in infrastructure, design benefit, the closure is stable, fixed arm, linking arm and the retractor arm, digging arm, linking arm and retractor arm can pass through set screw to be connected, can be according to operation mode or position bending at will, and be equipped with the antiskid tooth on retracting the retractor, will be pulled out the position and fix on retracting the retractor, it is nimble convenient to use, pulls out stably.

Drawings

FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is a schematic view of the structure of the movable arm of the present invention;

FIG. 3 is a cross-sectional view of the base of the moveable arm;

FIG. 4 isbase:Sub>A cross-sectional view taken at A-A of FIG. 1;

FIG. 5 is an enlarged view of a portion of FIG. 1 at A;

FIG. 6 is a schematic view of the retractor hook;

fig. 7 is a schematic view of the structure of the detachment forceps;

in the figure: 1. a fixed arm; 2. a movable arm; 3. retracting the drag hook; 4. disassembling the forceps;

11. retracting the hook arm; 12. a connecting arm; 13. a fixed arm base; 14. a rack; 21. pressing the steel balls; 22. a compression spring; 23. a movable arm base; 31. a hook plug; 32. an annular positioning groove; 33. Anti-slip teeth; 41. ejecting a pin; 42. a forked head; 111. the draw hook positions the steel ball; 112. a hook positioning spring; 113. a hook positioning groove; 231. a self-locking claw; 232. a return spring; 233. a gear; 234. rotating the handle; 235. tightening the screw; 236. a shaft head; 237. a pin shaft I; 238. a pin shaft II; 2331. a compressing device; 2341. positioning a groove; 2342. a positioning spring; 2343. and positioning the steel ball.

Detailed Description

Example 1

As shown in fig. 1 to 6, the minimally invasive small incision retractor of the present invention comprises a fixed arm 1 and a movable arm 2, wherein the fixed arm 1 is provided with a rack 14, the movable arm 2 is mounted on the rack 14, can slide along the rack 14, and is locked with the rack 14 through a rack locking device, and both the fixed arm 1 and the movable arm 2 comprise a base, a connecting arm 12 and a retracting hook arm 11; one end of the connecting arm 12 is rotatably connected with the corresponding base, and the other end is rotatably connected with the corresponding retracting hook arm 11; the retracting draw hook arm 11 is provided with a detachable retracting draw hook 3; the rack 14 is arranged on the fixed arm base 13, and the movable arm 2 is arranged on the rack 14 through the movable arm base 23; the connecting arm 12 is arc-shaped.

The rack locking device is arranged on the movable arm base 23 and comprises a self-locking claw 231 and a return spring 232, the self-locking claw 231 is hinged to the movable arm base 23 through the middle of the self-locking claw 231, a through hole is formed in the movable arm base 23 corresponding to the self-locking claw 231, the claw part at the front end of the self-locking claw 231 penetrates through the through hole to be clamped on the teeth of the rack 14, the return spring 232 is arranged at the rear end of the self-locking claw, and the return spring 232 is matched with the self-locking claw 231 to achieve locking.

The movable arm base 23 is provided with a rotating handle 234 assembly, and the rotating handle 234 assembly comprises a rotating handle 234 and a gear 233; a gear groove is formed in the movable arm base 23, and a gear 233 is mounted in the gear groove, rotates in the axial direction and is meshed with the rack 14; a rotation handle 234 is provided outside the movable arm base 23, and is connected to the gear 233; the gear 233 is axially rotated by the rotation handle 234, and the movable arm base 23 is slid.

One end of the gear 233 is fixed with a set screw 235, the other end is fixed with a shaft head 236, the shaft head 236 and the gear 233 are positioned through a pin shaft I237, and the connection between the gear and the shaft head is prevented from being loosened; the gear 233 is limited from two ends through a set screw 235 and a shaft head 236; the turning handle 234 is hinged with a shaft head 236 through a pin shaft II 238.

The rotating handle 234 adopts a butterfly handle; inside constant head tank 2341 that sets up of butterfly handle, installation positioning spring 2342 and location steel ball 2343 in the constant head tank 2341, on corresponding location steel ball 2343 was equipped with circular recess at spindle nose 236 top, location steel ball 2343 pushed up in the circular recess of spindle nose 236 under positioning spring 2342's effect, made the butterfly handle keep vertical state.

A pressing device 2331 is arranged on the movable arm base 23 corresponding to the gear 233; the pressing device 2331 is used for pressing the gear 233, so that the gear 233 has certain pressure, the gear 233 is prevented from rotating too flexibly and affecting positioning, the pressing device 2331 is arranged in a pressing groove communicated with a gear groove, the pressing groove is communicated with the outside all the way, a thread is arranged in the pressing groove, the pressing device 2331 comprises a pressing steel ball 21, a pressing spring 22 and a pressing block, the pressing block is provided with a thread matched with the pressing groove, and the pressing spring 22 pushes the pressing steel ball 21 to be pressed against the gear 233;

a retractor plug 31 is arranged on the back of the retractor body of the retractor 3, and an annular positioning groove is arranged on the retractor plug 31; a mounting hole and a retractor positioning groove 113 communicated with the mounting hole are formed in the retracting retractor arm 11 corresponding to the retractor plug 31, the retractor plug 31 is inserted into the mounting hole of the retracting retractor arm 11 and is attached to the plane of the mounting hole to prevent the retracting retractor 3 from rotating, and a retractor positioning spring 112 and a retractor positioning steel ball 111 are arranged in the retractor positioning groove 113; the drag hook plug 31 is inserted into the mounting hole, the drag hook positioning spring 112 pushes the drag hook positioning steel ball 111 into the annular positioning groove 32, and the assembly of the retracting drag hook 3 and the retracting drag hook arm 11 is realized.

The anti-slip teeth 33 are arranged on the retracting surface of the retractor body of the retracting retractor 3, so that the retracted part can be fixed on the retracting retractor 3 to prevent the retracting retractor from sliding in the operation.

Working process or working principle:

as shown in fig. 7, when the retractor 3 is replaced, the forceps 4 is removed, the forked head 42 of the forceps is inserted into the gap between the retractor 3 and the retractor arm 11, the forceps 4 is pressed, the ejector pin 41 ejects the retractor plug 31 from the mounting hole, and then the other types of retractor 3 are mounted.

The utility model discloses in to the description of the direction and the relative position relation of structure, about all around description about, do not constitute right the utility model discloses a restriction only is the description convenient.

Claims (9)

1. A minimally invasive small incision retractor comprises a fixed arm (1) and a movable arm (2), wherein a rack (14) is arranged on the fixed arm (1), the movable arm (2) is installed on the rack (14), can slide along the rack (14) and is locked with the rack (14) through a rack locking device, and the minimally invasive small incision retractor is characterized in that the fixed arm (1) and the movable arm (2) respectively comprise a base, a connecting arm (12) and a retracting hook arm (11); one end of each connecting arm (12) is rotatably connected with the corresponding base, and the other end of each connecting arm is rotatably connected with the corresponding retracting hook arm (11); a detachable retractor hook (3) is arranged on the retractor hook arm (11); the rack (14) is arranged on the fixed arm base (13), and the movable arm (2) is arranged on the rack (14) through the movable arm base (23).

2. Minimally invasive mini-incision retractor according to claim 1, wherein the connecting arm (12) is arc-shaped.

3. The minimally invasive small incision retractor according to claim 1, wherein a rack locking device is arranged on the movable arm base (23), the rack locking device comprises a self-locking claw (231) and a return spring (232), the self-locking claw (231) is hinged on the movable arm base (23) through the middle part of the self-locking claw, a through hole is formed in the movable arm base (23) corresponding to the self-locking claw (231), the claw part at the front end of the self-locking claw (231) penetrates through the through hole to be clamped on the teeth of the rack (14), the return spring (232) is arranged at the rear end of the self-locking claw, and the return spring (232) is matched with the self-locking claw (231) to realize locking.

4. The minimally invasive mini-incision retractor according to claim 1, 2 or 3, wherein the movable arm base (23) is provided with a rotation handle (234) assembly, and the rotation handle (234) assembly comprises a rotation handle (234) and a gear (233); a gear groove is formed in the movable arm base (23), and a gear (233) is installed in the gear groove, rotates along the axial direction and is meshed with the rack (14); the rotating handle (234) is positioned outside the movable arm base (23) and is connected with the gear (233); the gear (233) is driven to axially rotate by the rotating handle (234), and the movable arm base (23) is driven to slide.

5. The minimally invasive mini-incision retractor according to claim 4, wherein one end of the gear (233) is fixed with a set screw (235), the other end is fixed with a shaft head (236), the shaft head (236) and the gear (233) are positioned through a pin shaft I (237), and the gear (233) is limited from two ends through the set screw (235) and the shaft head (236); the rotating handle (234) is hinged with a shaft head (236) through a pin shaft II (238).

6. The minimally invasive mini-incision retractor according to claim 5, wherein the rotation handle (234) is a butterfly handle; the inside constant head tank (2341) that sets up of butterfly handle, installation positioning spring (2342) and location steel ball (2343) in constant head tank (2341), correspond location steel ball (2343) on spindle nose (236) top is equipped with circular recess, in the circular recess of jacking spindle nose (236) under positioning spring's (2342) effect location steel ball (2343), make the butterfly handle keep vertical state.

7. Minimally invasive mini-incision retractor according to claim 4, wherein the corresponding gear (233) is provided with a hold-down device (2331) on the movable arm base (23).

8. The minimally invasive small incision retractor according to claim 1, wherein a retractor plug (31) is arranged on the back of the retractor body of the retractor (3), and an annular positioning groove is arranged on the retractor plug (31); a mounting hole and a drag hook positioning groove (113) communicated with the mounting hole are formed in the retracting drag hook arm (11) corresponding to the drag hook plug (31), and a drag hook positioning spring (112) and drag hook positioning steel balls (111) are arranged in the drag hook positioning groove (113); the retractor plug (31) is inserted into the mounting hole, the retractor positioning steel balls (111) are jacked into the annular positioning groove (32) by the retractor positioning spring (112), and the assembly of the retractor (3) and the retractor arm (11) is achieved.

9. The minimally invasive mini-incision retractor according to claim 1 or 8, wherein the retractor body of the retractor (3) is provided with anti-skid teeth (33) on the retraction surface.

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