Double-layer multi-angle retraction fixing device for breast surgery

Abstract

The invention discloses a double-layer multi-angle retracting and fixing device for breast surgery. The double-layer multi-angle retracting and fixing device comprises a support, a height adjusting mechanism, a distraction mechanism and a retractor. The upper end of the support is slidably connected with a height adjusting mechanism. The opening mechanism is arranged at the upper end of the height adjusting mechanism; the distraction mechanism is connected with the retractor in a sliding manner; the opening mechanism comprises an opening knob, an opening gear, a rack groove, an opening rack, an opening box, a controller, a control groove and a control rod; the opening box is fixedly connected with a height adjusting mechanism, a rectangular through hole is formed in the opening box, cylindrical control grooves are symmetrically formed in the two ends of the middle of the opening box and communicate with each other, and rack grooves are formed in the opening box in an up-down staggered mode and slidably connected with opening racks. The top of the control groove is provided with a controller. The middle of the control groove is slidably connected with an expanding gear. A control rod is arranged at the front end of the opening gear and extends out of the control groove; opening knobs are arranged at the front ends of the control rods; the opening gear is controlled to slide in the control groove, so that the opening racks at the two ends are controlled to slide.

Description

Technical Field

[0001] The invention belongs to the technical field of medical surgical instruments, and in particular relates to a multi-angle retraction and fixing device for double-layer breast surgery. Background Art

[0002] At present, breast cancer surgery requires the retraction of the pectoralis major and pectoralis minor muscles. There are two levels that need to be retracted: one is the gap between the pectoralis major and pectoralis minor muscles, and the other is the gap between the pectoralis minor and the armpit. Currently, retractors are used, which require the assistance of multiple assistants. However, because the assistants' pulling force is uneven, sometimes the retraction is too tight and sometimes too loose. At the same time, the sizes of the upper and lower gaps are different, so it is particularly difficult to retract them manually, which often leads to unsatisfactory surgical results.

[0003] In the prior art, the existing retraction and fixation devices require multi-directional retraction during retraction and fixation, which makes it troublesome to adjust the retraction width and requires separate adjustments, which delays the operation time. At the same time, the existing devices cannot be adjusted according to the required retraction width between two levels and the time interval between the two levels, which increases the difficulty and efficiency of the operation.

[0004] In view of the above-mentioned existing technical problems, the present invention proposes a multi-angle retraction and fixation device for double-layer breast surgery. Summary of the invention

[0005] In order to solve the above technical problems, the present invention designs a multi-angle retraction and fixing device for double-layer breast surgery, by arranging a retraction box above the bracket and arranging a retraction gear in the middle of the retraction box, by arranging retraction racks at the rear ends of the support rods on both sides and staggered meshing the retraction gears, by rotating the retraction gears, the retraction racks at both ends slide relative to each other, and at the same time, control grooves are arranged at the front and rear ends of the retraction gears, and the meshing of the retraction gears and the retraction racks is controlled by controlling the retraction gears to slide in the control grooves, so as to achieve the control of sliding of the retraction racks at both ends; at the same time, by slidingly connecting the retraction layer 2 under the retractor, a telescopic plate is arranged to connect the retraction layer 1, and they are connected by a telescopic screw, and the retraction width of the retraction layer 2 is adjusted by controlling the rotation of the telescopic screw;

[0006] In order to achieve the above technical effects, the present invention is implemented through the following technical solutions: a multi-angle retraction and fixation device for double-layer breast surgery, comprising: a bracket, a height adjustment mechanism, a spreading mechanism, and a retractor;

[0007] The upper end of the bracket is slidably connected to the height adjustment mechanism; the upper end of the height adjustment mechanism is provided with a spreading mechanism; the spreading mechanism is slidably connected to the retractor;

[0008] The expansion mechanism includes an expansion knob, an expansion gear, a rack groove, an expansion rack, an expansion box, a controller, a control groove, and a control rod; the expansion box is fixedly connected to the height adjustment mechanism, a rectangular through hole is arranged inside the expansion box, cylindrical control grooves are symmetrically arranged at both ends of the middle position and are connected, and rack grooves are staggered up and down in the expansion box and are slidably connected to the expansion rack; a controller is arranged on the top of the control groove, and the middle of the control groove is slidably connected to the expansion gear; a control rod is arranged at the front end of the expansion gear and extends out of the control groove; an expansion knob is arranged at the front end of the control rod;

[0009] Furthermore, the other end of the spreading rack is vertically connected to the support rod; the front end of the support rod is vertically connected to the annular spreading rod; a spreading slot is provided in the spreading rod to be slidably connected to the retractor;

[0010] Furthermore, the total length of the control slot is equal to the length of the open gear and is also equal to the length of the control rod;

[0011] Furthermore, the controller includes a control box, a control button, a control block, a control spring, a control connecting rod, a limit block, a control slide, and a control slide rod; a through hole is arranged at the bottom of the control box near one end of the opening box to connect to the opening box, and a control spring is arranged at the bottom of the other end; a control block is arranged at the upper end of the control spring; a control button is arranged at the top of the control block and extends out of the control box, a control slide is arranged at the side of the control block away from the opening box to slide and connect the control slide rod, and a limit block is arranged at the bottom of the control block near the side of the opening box; the front end of the control slide rod is movably connected to the control connecting rod; the other end of the control connecting rod is rotatably connected to the control box;

[0012] Furthermore, a fixing groove is provided at the bottom of the bracket; a hole is provided at the bottom of the fixing groove to be threadedly connected to a fixing screw; a fixing plate is provided at the upper end of the fixing screw, and a fixing knob is provided at the lower end;

[0013] Furthermore, the height adjustment mechanism includes a worm wheel, a rocker, a positioning block, a worm, a height adjustment rack, and a height adjustment rod; a rectangular groove is provided at the upper end of the bracket, and a worm wheel is arranged in the rectangle, and a worm is arranged at the upper end of the worm wheel to engage with the worm wheel; the front end of the worm extends out of the bracket and positioning blocks are symmetrically arranged on both sides of the bracket; a rocker is arranged at the front end of the positioning block; a height adjustment rack is arranged at the bottom of the height adjustment rod and extends into the bracket to engage with the worm wheel;

[0014] Furthermore, the height adjustment rack is a helical gear;

[0015] Furthermore, the retractor includes a telescopic knob, a telescopic screw, a slider, a retracting layer 1, a retracting layer 2, a telescopic plate, a limiting column, a telescopic spring, and a limiting slot; the slider is slidably connected to the open slide slot, and the retracting layer 1 is arranged at the front end of the slider; the top of the retracting layer 1 is provided with a hole threadedly connected to the telescopic screw, and the middle is slidably connected to the telescopic plate; the front end of the telescopic screw is provided with a telescopic knob, and the rear end is movably connected to the telescopic plate; a rectangular slot is provided at the lower end of the telescopic plate, and a plurality of limiting slots are provided at both ends; circular holes are symmetrically provided on both sides of the upper end of the retracting layer 2, and a telescopic spring is provided at the bottom of the circular hole; a limiting column is provided at the front end of the telescopic spring to be movably connected to the limiting slot;

[0016] Furthermore, a plurality of retractors are slidably connected to the support slide grooves at both ends.

[0017] The beneficial effects of the present invention are:

[0018] The present invention arranges a spreading box above the bracket, arranges a spreading gear in the middle of the spreading box, arranges spreading racks at the rear ends of the support rods on both sides and staggers the spreading gears to mesh with the spreading racks, and rotates the spreading gears to make the spreading racks at both ends slide relative to each other. Meanwhile, control grooves are arranged at the front and rear ends of the spreading gears, and the spreading gears are controlled to slide in the control grooves to control the meshing of the spreading gears and the spreading racks, so as to respectively control the sliding of the spreading racks at both ends; thereby, the purpose of quickly adjusting the pulling width is achieved.

[0019] At the same time, by slidingly connecting the retracting layer two under the retractor, a telescopic plate is set to connect the retracting layer one, and connected through a telescopic screw, and the retraction width of the retracting layer two is adjusted by controlling the rotation of the telescopic screw; and by setting a rectangular groove at the lower end of the telescopic plate, and setting a plurality of limit grooves at both ends; circular holes are symmetrically set on both sides of the upper end of the retracting layer two, and a telescopic spring is set at the bottom of the circular hole; a limit column is set at the front end of the telescopic spring and movably connected to the limit groove, and the distance between the retracting layer one and the retracting layer two can be adjusted by pulling the retracting layer two to make the limit column slide downward along the limit groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0021] Figure 1 It is a schematic diagram of the overall structure of a multi-angle retraction and fixation device for double-layer breast surgery;

[0022] Figure 2 It is a side cross-sectional view of a multi-angle retraction and fixation device for double-layer breast surgery;

[0023] Figure 3 It is a front cross-sectional view of a multi-angle retractor and fixator for double breast surgery;

[0024] Figure 4 It is a schematic diagram of the retractor structure of a multi-angle retractor fixation device for double-layer breast surgery;

[0025] Figure 5 It is a schematic diagram of the connection structure of the retractor layer 1 and the telescopic plate of the multi-angle retractor fixation device for double-layer breast surgery;

[0026] Figure 6 A is a partial view of a multi-angle retractor and fixator for double breast surgery;

[0027] Figure 7 It is a partial view of the multi-angle retractor fixation device used in double-layer breast surgery B;

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1- bracket, 101- fixed knob, 102- fixed screw, 103- fixed plate, 104- fixed slot, 2- height adjustment mechanism, 201- worm gear, 202- rocker, 203- positioning block, 204- worm, 205- height adjustment rack, 206- height adjustment rod, 3- opening mechanism, 301- opening knob, 302- opening gear, 303- rack slot, 304- opening rack, 305- opening box, 306- controller, 3061- control button, 3062- control block, 3063- control Control spring, 3064-control connecting rod, 3065-limiting block, 3066-control slide, 3067-control slide, 3068-control box, 307-support rod, 308-opening rod, 309-opening slide, 310-control slot, 311-control rod; 4-retractor, 401-telescopic knob, 402-telescopic screw, 403-sliding block, 404-retracting layer one, 405-retracting layer two, 4051-limiting column, 4052-telescopic spring, 4053-limiting slot, 406-retracting plate. DETAILED DESCRIPTION

[0030] The present invention discloses a multi-angle retraction and fixing device for double-layer breast surgery, comprising: a support 1, a height adjustment mechanism 2, a spreading mechanism 3, and a retractor 4; the upper end of the support 1 is slidably connected to the height adjustment mechanism 2; the spreading mechanism 3 is arranged on the upper end of the height adjustment mechanism 2; the spreading mechanism 3 is slidably connected to the retractor 4; the spreading mechanism 3 comprises a spreading knob 301, a spreading gear 302, a rack groove 303, a spreading rack 304, a spreading box 305, a controller 306, a control groove 310, and a control rod 311; the spreading box 305 is fixedly connected to the height adjustment mechanism 2, and a rectangular through hole is arranged inside the spreading box 305, Cylindrical control grooves 310 are symmetrically arranged at both ends of the middle position and are connected. Rack grooves 303 are staggered up and down in the opening box 305 and are slidably connected to the opening rack 304. A controller 306 is arranged at the top of the control groove 310, and the middle of the control groove 310 is slidably connected to the opening gear 302. A control rod 311 is arranged at the front end of the opening gear 302 and extends out of the control groove 310. An opening knob 301 is arranged at the front end of the control rod 311. By controlling the opening gear 302 to slide in the control groove 310, the meshing of the opening gear 302 and the opening rack 304 is controlled, so as to achieve the purpose of controlling the sliding of the opening racks 304 at both ends respectively.

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] Example 1

[0033] like Figure 1 , 3As shown in , 6 and 7, the upper end of the bracket 1 is slidably connected to the height adjustment mechanism 2; the upper end of the height adjustment mechanism 2 is provided with a spreading mechanism 3; the spreading mechanism 3 is slidably connected to the retractor 4; the spreading mechanism 3 includes a spreading knob 301, a spreading gear 302, a rack groove 303, a spreading rack 304, a spreading box 305, a controller 306, a control groove 310, and a control rod 311; the spreading box 305 is fixedly connected to the height adjustment mechanism 2, a rectangular through hole is provided inside the spreading box 305, cylindrical control grooves 310 are symmetrically provided at both ends of the middle position and are connected, and rack grooves 303 are staggered up and down in the spreading box 305 to slide and connect The control slot 310 is connected to the rack 304; the controller 306 is arranged at the top of the control slot 310, and the middle of the control slot 310 is slidably connected to the gear 302; the front end of the gear 302 is provided with a control rod 311 and extends out of the control slot 310; the front end of the control rod 311 is provided with a knob 301; the other end of the rack 304 is vertically connected to the support rod 307; the front end of the support rod 307 is vertically connected to the annular rack 308; the rack 308 is provided with a slot 309 for sliding connection with the retractor 4; the total length of the control slot 310 is equal to the length of the gear 302, and is also equal to the length of the control rod 311;

[0034] The controller 306 includes a control box 3068, a control button 3061, a control block 3062, a control spring 3063, a control connecting rod 3064, a limit block 3065, a control slide 3066, and a control slide rod 3067; a through hole is provided at one end of the bottom of the control box 3068 near the opening box 305 to connect to the opening box 305, and a control spring 3063 is provided at the bottom of the other end; a control block 3062 is provided at the upper end of the control spring 3063; a control button 3061 is provided at the top of the control block 3062 and extends out of the control box 3068, and the control block 3062 is provided with a control button 3061. A control slide groove 3066 is provided on the side of the control block 3062 away from the opening box 305 to be slidably connected to the control slide rod 3067, and a limit block 3065 is provided on the bottom of the control block 3062 close to the opening box 305; the front end of the control slide rod 3067 is movably connected to the control link 3064; the other end of the control link 3064 is rotatably connected to the control box 3068; a fixing groove 104 is provided at the bottom of the bracket 1; a hole is provided at the bottom of the fixing groove 104 to be threadedly connected to the fixing screw 102; a fixing plate 103 is provided at the upper end of the fixing screw 102, and a fixing knob 101 is provided at the lower end;

[0035] In this embodiment, the working principle of the spreading mechanism 3 is as follows: by rotating the spreading knob 301, the control rod 311 is driven to rotate, thereby driving the spreading gear 302 to rotate, so that the spreading gear 302 is meshed with the spreading rack 304, thereby pushing the spreading rack 304 relatively apart or close, thereby adjusting the distance between the spreading rods 308 at both ends, and achieving the purpose of quickly adjusting the spreading distance;

[0036] When the right-end opening rod 308 needs to be adjusted separately, the opening knob 301 is pulled to make one end of the opening gear 302 extend into the front control slot 310. When the front end of the opening gear 302 fits the front end of the control slot 310, the control gear is disengaged from the meshing of the bottom control rack, so as to achieve the purpose of separately adjusting the opening distance of the right-end opening rod 308.

[0037] When the left end expansion rod 308 needs to be adjusted, the control button 3061 is pressed, so that the control block 3062 compresses the control spring 3063, so that the control slide bar 3067 is disengaged from the top groove of the control slide groove 3066. After releasing the control button 3061, the control slide bar 3067 slides to the bottom of the control slide groove 3066 through the elastic return effect of the control spring 3063, so that the limit block 3065 at the bottom of the control block 3062 retracts into the expansion groove, thereby pushing the expansion gear 302 into the rear end control groove 310, so that the top of the control gear is disengaged from the meshing of the control gear, so as to achieve the purpose of adjusting the expansion distance of the right end expansion rod 308 alone.

[0038] When the spreading distance at both ends needs to be adjusted simultaneously, the control button 3061 is pressed to make the limit block 3065 at the bottom of the control block 3062 extend into the spreading box 305, and the spreading gear 302 is pushed to the limit block 3065, so that the limit block 3065 forms a limit on the rear end of the spreading gear 302, so that the spreading gear 302 is meshed with the spreading racks 304 at both ends at the same time;

[0039] In this embodiment, by setting the staggered meshing of the distraction gear 302 and the distraction rack 304, distraction can be performed in multiple directions to meet different surgical needs. By rotating the distraction knob 301, the control rod 311 and the distraction gear 302 are driven to rotate, and the distraction rack 304 can slide relative to each other, so as to quickly adjust the distraction width and save surgical time. The device is designed with a control slot 310 and a controller 306, which can respectively control the sliding of the distraction racks 304 at both ends to achieve an independent adjustment effect and meet different levels of distraction needs. This solves the problem in the prior art that the distraction width adjustment is troublesome and needs to be adjusted separately, which delays the surgical time.

[0040] Example 2

[0041] like Figure 1 , 2As shown, the height adjustment mechanism 2 includes a worm wheel 201, a rocker 202, a positioning block 203, a worm 204, a height adjustment rack 205, and a height adjustment rod 206; a rectangular groove is provided at the upper end of the bracket 1, and a worm wheel 201 is arranged in the rectangle, and a worm 204 is arranged at the upper end of the worm wheel 201 to mesh with the worm wheel 201; the front end of the worm 204 extends out of the bracket 1 and a positioning block 203 is symmetrically arranged on both sides of the inner and outer sides of the bracket 1; a rocker 202 is arranged at the front end of the positioning block 203; a height adjustment rack 205 is arranged at the bottom of the height adjustment rod 206 and extends into the bracket 1 to mesh with the worm wheel 201; the height adjustment rack 205 is a helical tooth;

[0042] In this embodiment, the height adjustment mechanism 2 can be used to adjust the device according to the height of the patient's wound surface when it is used, so as to achieve accurate fit between the two layers and thus perform retraction.

[0043] Example 3

[0044] like Figure 1 , 4 As shown in Figure 5, the retractor 4 includes a telescopic knob 401, a telescopic screw 402, a slider 403, a retracting layer 1 404, a retracting layer 2 405, a telescopic plate 406, a limiting column 4051, a telescopic spring 4052, and a limiting groove 4053; the slider 403 is slidably connected to the open slide groove 309, and the retracting layer 1 404 is arranged at the front end of the slider 403; the retracting layer 1 404 is provided with a hole threadedly connected to the telescopic screw 402 at the top, and the telescopic plate 406 is slidably connected in the middle ; A telescopic knob 401 is provided at the front end of the telescopic screw 402, and the rear end is movably connected to the telescopic plate 406; a rectangular groove is provided at the lower end of the telescopic plate 406, and a plurality of limit grooves 4053 are provided at both ends; round holes are symmetrically provided on both sides of the upper end of the second retracting layer 405, and a telescopic spring 4052 is provided at the bottom of the round hole; a limit column 4051 is provided at the front end of the telescopic spring 4052 and movably connected to the limit groove 4053; a plurality of retractors 4 are slidably connected to the slide grooves 309 at both ends;

[0045] In this embodiment, when the device is in use, the slider 403 is pulled to slide along the spreading slide groove 309 to adjust the spreading angle of the spreader when in use, and the height of the device is adjusted by using the height adjustment mechanism 2, so that the spreading layer 1 404 is aligned with the gap between the pectoralis major and pectoralis minor of the patient, and the spreading layer 2 405 is pulled at the same time, and the limit column 4051 is retracted by the elastic action of the telescopic spring 4052, so that the position of the spreading layer 2 405 can be pulled in the telescopic plate 406. After the spreading layer 2 405 is aligned with the gap between the pectoralis minor and the axilla, The second retraction layer 405 is released, and the retraction spring 4052 pushes the limiting column 4051 into the limiting groove 4053 through the elastic reset effect, so as to limit the second retraction layer 405 in the vertical direction; at the same time, according to the required retraction width of the second retraction layer 405, the retraction knob 401 is rotated to drive the retraction screw 402 to rotate on the first retraction layer 404, and the retraction screw 402 is connected through the thread, so as to adjust the horizontal distance between the first retraction layer 404 and the second retraction layer 405; so as to achieve the purpose of adjusting the retraction width of the second retraction layer 405;

[0046] In this embodiment, the retractor 4 can accurately adjust the retraction width of the retraction layer 2 405 through the connection between the telescopic screw 402 and the telescopic plate 406 to adapt to different surgical needs. By pulling the retraction layer 2 405, the limiting column 4051 can slide downward along the limiting groove 4053, so as to quickly adjust the distance between the retraction layer 1 404 and the retraction layer 2 405. The retractor 4 can adapt to different tissue layers between the pectoralis major and the pectoralis minor and between the pectoralis minor and the axilla, and provide appropriate retraction.

[0047] In summary, the present invention provides a spreading box 305 above the bracket 1, and a spreading gear 302 in the middle of the spreading box 305, and respectively provides spreading racks 304 at the rear ends of the support rods 307 on both sides and staggeredly meshes with the spreading gears 302, and allows the spreading gears 302 to rotate, so that the spreading racks 304 at both ends slide relative to each other, and at the same time, control grooves 310 are provided at the front and rear ends of the spreading gears 302, and the spreading gears 302 are controlled to slide in the control grooves 310, so as to control the meshing of the spreading gears 302 and the spreading racks 304, so as to respectively control the sliding of the spreading racks 304 at both ends; thereby, the purpose of quickly adjusting the pulling width is achieved;

[0048] At the same time, by slidingly connecting the retracting layer 2 405 under the retractor 4, a telescopic plate 406 is set to connect the retracting layer 1 404, and connected through the telescopic screw 402, the retraction width of the retracting layer 2 is adjusted by controlling the rotation of the telescopic screw 402; and by setting a rectangular groove at the lower end of the telescopic plate 406, and setting a plurality of limit grooves 4053 at both ends; circular holes are symmetrically set on both sides of the upper end of the retracting layer 2 405, and a telescopic spring 4052 is set at the bottom of the circular hole; a limit column 4051 is set at the front end of the telescopic spring 4052 and movably connected to the limit groove 4053, and the distance between the retracting layer 1 404 and the retracting layer 2 405 can be adjusted by pulling the retracting layer 405 to make the limit column 4051 slide downward along the limit groove 4053.

[0049] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described.

Claims

1. A multi-angle retraction and fixation device for double-layer breast surgery, characterized in that: include: Bracket, height adjustment mechanism, opening mechanism, retractor; The upper end of the bracket is slidably connected to the height adjustment mechanism; the upper end of the height adjustment mechanism is provided with a spreading mechanism; the spreading mechanism is slidably connected to the retractor; The expansion mechanism includes an expansion knob, an expansion gear, a rack groove, an expansion rack, an expansion box, a controller, a control groove, and a control rod; the expansion box is fixedly connected to the height adjustment mechanism, a rectangular through hole is arranged inside the expansion box, cylindrical control grooves are symmetrically arranged at both ends of the middle position and are connected, and rack grooves are staggered up and down in the expansion box and are slidably connected to the expansion rack; a controller is arranged on the top of the control groove, and the middle of the control groove is slidably connected to the expansion gear; a control rod is arranged at the front end of the expansion gear and extends out of the control groove; an expansion knob is arranged at the front end of the control rod.

2. The multi-angle retraction and fixation device for double-layer breast surgery according to claim 1, characterized in that: The other end of the spreading rack is vertically connected to the support rod; the front end of the support rod is vertically connected to the annular spreading rod; a spreading slot is arranged in the spreading rod to be slidably connected to the retractor.

3. The multi-angle retraction and fixation device for double-layer breast surgery according to claim 1, characterized in that: The total length of the control groove is equal to the length of the spread gear and is also equal to the length of the control rod.

4. The multi-angle retraction and fixation device for double-layer breast surgery according to claim 1, characterized in that: The controller includes a control box, a control button, a control block, a control spring, a control connecting rod, a limit block, a control slot, and a control slide rod; a through hole is arranged at the bottom of the control box near one end of the opening box to connect to the opening box, and a control spring is arranged at the bottom of the other end; a control block is arranged at the upper end of the control spring; a control button is arranged at the top of the control block and extends out of the control box, a control slot is arranged on the side of the control block away from the opening box to slide and connect the control slide rod, and a limit block is arranged at the bottom of the control block near the side of the opening box; the front end of the control slide rod is movably connected to the control connecting rod; the other end of the control connecting rod is rotatably connected to the control box.

5. The multi-angle retraction and fixation device for double-layer breast surgery according to claim 4, characterized in that: A fixing groove is arranged at the bottom of the bracket; a hole is arranged at the bottom of the fixing groove to be threadedly connected to a fixing screw; a fixing plate is arranged at the upper end of the fixing screw, and a fixing knob is arranged at the lower end.

6. The multi-angle retraction and fixation device for double-layer breast surgery according to claim 1, characterized in that: The height adjustment mechanism includes a worm wheel, a rocker, a positioning block, a worm, a height adjustment rack, and a height adjustment rod; a rectangular groove is provided at the upper end of the bracket, and a worm wheel is arranged in the rectangle, and a worm is arranged at the upper end of the worm wheel to engage with the worm wheel; the front end of the worm extends out of the bracket and positioning blocks are symmetrically arranged on both sides of the inner and outer sides of the bracket; a rocker is arranged at the front end of the positioning block; a height adjustment rack is arranged at the bottom of the height adjustment rod and extends into the bracket to engage with the worm wheel.

7. The multi-angle retraction and fixation device for double-layer breast surgery according to claim 6, characterized in that: The height-adjusting rack is a helical gear.

8. The multi-angle retraction and fixation device for double-layer breast surgery according to claim 1, characterized in that: The retractor includes a telescopic knob, a telescopic screw, a slider, a retracting layer one, a retracting layer two, a telescopic plate, a limit column, a telescopic spring, and a limit slot; the slider is slidably connected to the open slide slot, and the retracting layer one is arranged at the front end of the slider; the top of the retracting layer one is provided with a hole threadedly connected to the telescopic screw, and the middle is slidably connected to the telescopic plate; the front end of the telescopic screw is provided with a telescopic knob, and the rear end is movably connected to the telescopic plate; a rectangular slot is provided at the lower end of the telescopic plate, and a plurality of limit slots are provided at both ends; circular holes are symmetrically provided on both sides of the upper end of the retracting layer two, and a telescopic spring is provided at the bottom of the circular holes; a limit column is provided at the front end of the telescopic spring and movably connected to the limit slot.

9. The multi-angle retraction and fixation device for double-layer breast surgery according to claim 8, characterized in that: A plurality of retractors are slidably connected to the supporting slide grooves at both ends.

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