Four-head thyroid retractor device

Abstract

The invention relates to the technical field of medical apparatus and instruments, in particular to a four-head thyroid retractor device which comprises two opening arms, two connecting rods, two connecting rods, two connecting rods and two connecting rods, and the two ends of each opening arm are respectively provided with a mounting seat and a handle; a first drag hook and a second drag hook are rotationally connected to each mounting seat; the first drag hooks are detachably connected with the second drag hooks corresponding to the first drag hooks; and the two handles are rotationally connected. The first drag hook comprises a shaft ring rotationally arranged outside the mounting seat in a sleeving manner; the shaft ring is connected with a first drag hook arm; a locking assembly for fixing the first drag hook and a tooth groove block for locking the second drag hook are arranged on the side edge of the shaft ring; the locking assembly is connected with the annular face of the tooth groove block. The locking assembly comprises a C-shaped supporting assembly connected with the tooth groove block. The inner side of the supporting assembly is movably connected with two clamping blocks used for clamping the mounting base, and the outer side of the supporting assembly is movably connected with an adjusting assembly used for controlling the distance between the two clamping blocks. The angle of each drag hook can be independently adjusted, and different operation requirements are met.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a four-headed thyroid retractor device. Background Technology

[0002] The thyroid gland is a very important gland in vertebrates, belonging to the endocrine system. In mammals, it is located below the thyroid cartilage in the neck, on either side of the trachea. The human thyroid gland is shaped like a butterfly, resembling a shield, hence its name. The thyroid gland controls the rate at which energy is used, produces proteins, and regulates the body's sensitivity to other hormones.

[0003] Thyroid retractors are essential instruments for exposing the surgical field during thyroid surgery. Currently, the thyroid retractors used in surgery are usually single-headed, meaning they have only one retractor head. During surgery, medical staff use the retractor to hold the human tissue and fix the surgical field. However, in a single surgery, multiple retractor heads are needed to fix the field of view. This sometimes requires one person to hold the retractor with both hands, or multiple people to operate simultaneously, which takes up space and hinders the progress of the surgery.

[0004] A patent with authorization announcement number CN107334498U discloses a multi-headed retractor thyroid retractor, comprising: two opening arms, each opening arm being arc-shaped and equipped with a hook; each opening arm including an arm body connected to the hook and a connecting rod hinged to an adjusting rod; the hooks comprising a first hook rod and a second hook rod; the first hook rod having a hook at its end and an axially distributed recess at its connecting end to the second hook rod; the second hook rod having a protrusion that mates with the recess, and a spring a on the protrusion, which is connected to both the protrusion and the bottom of the recess; when the protrusion is engaged in the recess, the spring a has a preload tension; the second hook rod passes through the opening arm; both sides of the second hook rod opening arm have springs b and nuts fitted on the second hook rod; the springs b are engaged by a locking block on the second hook rod, and are located between the locking block and the opening arm; the nuts and the second hook rod are threadedly connected.

[0005] However, the above-mentioned multi-headed retractor thyroid retractor still has the following problems when used: (1) The multi-headed retractor thyroid retractor adjusts the traction direction of the retractor by moving the adjusting rod back and forth, but the adjustment of the opening angle and the traction direction are carried out at the same time, which cannot achieve fine adjustment; (2) The multi-headed retractor thyroid retractor lacks a disinfection device for the endoscope tube and can only adjust two retractors, resulting in a limited surgical field of view. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention provides a four-head thyroid retractor device. On the one hand, through the design of two open arms, a mounting base, a first retractor, and a second retractor, each retractor can be independently adjusted in angle to adapt to different surgical needs. On the other hand, the locking component ensures a stable connection between the first retractor and the mounting base, while allowing for quick unlocking and repositioning when needed.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: This application provides a design for a four-headed thyroid retractor device, comprising: two open arms, each open arm having a mounting base and a handle at both ends; each mounting base having a first hook and a second hook rotatably connected to it; the first hook and the corresponding second hook being detachably connected; and the two handles being rotatably connected to each other.

[0008] Furthermore, the first hook includes a collar rotatably sleeved outside the mounting base; a first hook arm is connected to the collar; a locking component for fixing the first hook and a toothed block for locking the second hook are provided on the side of the collar; the locking component is connected to the annular surface of the toothed block.

[0009] Furthermore, the locking assembly includes a C-shaped support assembly connected to the toothed block; the inner side of the support assembly is movably connected to two clamping blocks for clamping the mounting base, and the outer side is movably connected to an adjustment assembly for controlling the distance between the two clamping blocks.

[0010] Furthermore, the support assembly includes two fixing blocks, a connecting rod disposed between the two fixing blocks, and a connecting seat sleeved on the connecting rod; the two fixing blocks are located on both sides of the mounting seat; a connecting column rotatably passes through each fixing block; each connecting column has multiple protrusions at one end and a rocker arm for controlling the rotation of the connecting column at the other end; each clamping block has a corresponding spiral plate that cooperates with the protrusions; the two ends of the adjustment assembly are connected to the two rocker arms respectively.

[0011] Furthermore, the adjustment assembly includes a trapezoidal button slidably connected to the connecting seat, and hydraulic push rods respectively disposed on both sides of the button; the two inclined surfaces of the button are provided with slide rails for controlling the extension and retraction of the hydraulic push rods; one end of each of the two hydraulic push rods is slidably connected to the corresponding slide rail, and the other end is connected to the corresponding rocker arm.

[0012] Furthermore, a plurality of telescopic rods are connected between the clamping block and the fixing block, and a first spring is sleeved on the outside of each of the plurality of telescopic rods.

[0013] Furthermore, the second hook includes a shaft ring rotatably mounted on the mounting base; a limiting component for locking the toothed block is provided on the side end of the shaft ring; and a second hook arm is connected to the shaft ring.

[0014] Furthermore, the limiting component includes a connecting block and a locking block that slides through the connecting block and matches the toothed block; a second spring is provided between the locking block and the connecting block.

[0015] Furthermore, a lever is connected to one side of the card block, and a limiting member is connected to the other side; the lever slides through the connecting block; the limiting member is slidably connected to the connecting block.

[0016] Furthermore, the two opening arms are hinged together, and one of the opening arms is provided with a limiting hole, while the other opening arm is provided with a limiting block.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. The design of two opening arms, a mounting base, a first hook, and a second hook allows each hook to be independently adjusted to adapt to different surgical needs. This flexibility helps to better expose the surgical field and improve surgical efficiency. The locking components (including support components, clamping blocks, and adjustment components) ensure a stable connection between the first hook and the mounting base, while allowing for quick unlocking and repositioning when needed. This design not only improves operational safety but also simplifies adjustment steps during surgery. The entire device adopts a modular design, with each component maintaining a certain degree of independence while working closely together. In particular, the design of the second hook's shaft and limiting components ensures sufficient range of motion without taking up too much space, making it ideal for use in confined surgical areas.

[0018] 2. The locking component is designed to be controlled with a single button during surgery, simplifying the complex fixation process and saving time. The adjustment component uses a hydraulic push rod in conjunction with a button to achieve precise control of the clamping block distance, thereby ensuring the stability of the connection between the collar and the mounting base. This helps reduce the risk of accidental movement during surgery and ensures a smoother surgical operation.

[0019] 3. The clamping block and the fixing block are connected by a telescopic rod and a first spring, which can provide appropriate clamping force on tissues or instruments of different thicknesses, avoiding damage to tissues or instruments due to excessive tightness, or slippage due to excessive looseness.

[0020] 4. The combination of the joystick and the protrusion with the spiral plate, as well as the combination of the lever and the limiting component, allows users to complete complex mechanical adjustments through simple rotation or sliding movements, greatly simplifying the operation process and reducing the learning curve for doctors.

[0021] 5. The hinge design between the opening arms and the setting of limiting holes and limiting blocks effectively limit the maximum opening angle of the opening arms, preventing excessive opening from causing equipment failure or damage to patient tissues. This design increases the safety of the operation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the front structure of the present invention; Figure 3 This is a partial structural diagram of the present invention; Figure 4 This is a side view of the present invention; Figure 5 This is a schematic diagram of the open arm structure in this invention; Figure 6 This is a schematic diagram of the structure of the first hook in this invention; Figure 7 This is a schematic diagram of the structure of the second hook in this invention; Figure 8 This is a side view of the locking component in this invention. Figure 9 This is a schematic diagram of the locking component in this invention; Figure 10 This is a schematic diagram of the structure of the connecting column, protrusion, and spiral plate in this invention; Figure 11 This is a schematic diagram of the limiting component in this invention.

[0024] In the diagram: 1-Opening arm; 11-Mounting base; 12-Handle; 13-Mounting rod; 14-Hinge seat; 2-First hook; 21-Shaft collar; 22-First hook arm; 23-Groove block; 3-Locking assembly; 31-Support assembly; 311-Fixing block; 312-Connecting rod; 313-Connecting base; 314-Connecting column; 315-Protrusion; 316-Rock arm; 32-Clamping block; 321-Spiral blade; 322-Telescopic rod; 323-First spring; 33-Adjusting assembly; 331-Button; 332-Hydraulic push rod; 333-Slide rail; 4-Second hook; 41-Shaft collar; 42-Second hook arm; 43-Limiting assembly; 431-Connecting block; 432-Clocking block; 433-Second spring; 434-Toggle lever; 435-Limiting component; 5-Limiting hole; 6-Limiting block. Detailed Implementation

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, and not all embodiments.

[0026] In the description of this invention, it should be understood that the terms "front", "rear", "left", "right", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Example 1

[0028] Combination Figure 1-11 As shown, the present invention provides a four-head thyroid retractor device, comprising: two opening arms 1, each opening arm 1 having a mounting base 11 and a handle 12 at both ends; each mounting base 11 having a first retractor 2 and a second retractor 4 rotatably connected thereto; the first retractor 2 and the corresponding second retractor 4 being detachably connected; and the two handles 12 being rotatably connected.

[0029] In this embodiment, the two opening arms 1 are arc-shaped structures, the mounting base 11 and the opening arms 1 are designed as a whole, and the mounting base 11 is fitted with a mounting rod 13. The mounting rod 13 and the mounting base 11 are detachably connected and remain fixed when connected; the first hook 2 and the second hook 4 are both rotatably fitted on the mounting rod 13.

[0030] Furthermore, the first hook 2 includes a collar 21 rotatably sleeved outside the mounting base 11; a first hook arm 22 is connected to the collar 21; a locking component 3 for fixing the first hook 2 and a toothed block 23 for locking the second hook 4 are provided on the side of the collar 21; the locking component 3 is connected to the toothed block 23 on the circumferential surface.

[0031] Specifically, the collar 21 is rotatably sleeved on the mounting rod 13; the toothed block 23 has a fan-shaped structure with multiple toothed grooves distributed on it; the locking component 3 is fixedly connected to the toothed block 23 at one end near the toothed block 23, and the locking component 3 is used to clamp the two sides of the mounting base 11.

[0032] Furthermore, the second hook 4 includes a shaft ring 41 rotatably mounted on the mounting base 11; the side end of the shaft ring 41 is provided with a limiting component 43 for locking the toothed block 23; a second hook arm 42 is connected to the shaft ring 41. The opening arm 1, handle 12, mounting base 11, hook arm, shaft ring 21, shaft ring 41, and other structures are usually made of stainless steel or titanium alloy because these materials have good biocompatibility, corrosion resistance, and sufficient mechanical strength.

[0033] Furthermore, the limiting component 43 includes a connecting block 431 and a locking block 432 that slides through the connecting block 431 and matches the toothed block 23; a second spring 433 is provided between the locking block 432 and the connecting block 431.

[0034] In this embodiment, the shaft ring 41 is rotatably sleeved on the mounting rod 13, the limiting component 43 is correspondingly disposed above the toothed block 23, the end of the locking block 432 near the locking block 23 matches the locking groove, and the other end is slidably connected to the connecting block 431 through the second spring 433.

[0035] Furthermore, a lever 434 is connected to one side of the locking block 432, and a limiting member 435 is connected to the other side; the lever 434 slides through the connecting block 431; the limiting member 435 is slidably connected to the connecting block 431.

[0036] Furthermore, the two opening arms 1 are hinged, with one opening arm 1 having a limiting hole 5 and the other opening arm 1 having a limiting block 6. The hinge between the two opening arms 1 allows the angle of the entire device to be adjusted to accommodate different surgical needs; at the same time, the design of the limiting hole 5 and the limiting block 6 prevents over-expansion.

[0037] When using, first manually press the lever 434 upward to lift the locking block 432, then manually adjust the angle of the second hook 4. Once it is appropriate, release the lever 434, and the locking block 432 will automatically lock into the slot.

[0038] Furthermore, the two opening arms 1 are hinged together, and one opening arm 1 is provided with a limiting hole 5, while the other opening arm 1 is provided with a limiting block. The two opening arms 1 are hinged together by a hinge seat 14, and the limiting block and the limiting hole 5 are interference-fitted, which facilitates the adjustment of the angle between the two opening arms 1. In use, the limiting block and the limiting hole 5 are separated, the opening arm 1 is adjusted to a suitable angle, and then the limiting block is inserted into the limiting hole 5. Example 2

[0039] Based on Example 1, referring to Figure 2-11 As shown, in order to further improve the ease of operation of this device, the side of the collar 21 is provided with a locking component 3 for fixing the first hook 2. The locking component 3 includes a C-shaped support component 31 connected to the toothed block 23. The inner side of the support component 31 is movably connected to two clamping blocks 32 for clamping the mounting base 11, and the outer side is movably connected to an adjustment component 33 for controlling the distance between the two clamping blocks 32.

[0040] Furthermore, the support assembly 31 includes two fixing blocks 311, a connecting rod 312 disposed between the two fixing blocks 311, and a connecting seat 313 sleeved on the connecting rod 312; the two fixing blocks 311 are located on both sides of the mounting base 11; a connecting post 314 rotatably passes through each fixing block 311; each connecting post 314 has multiple protrusions 315 at one end and a rocker arm 316 for controlling the rotation of the connecting post 314 at the other end; each clamping block 32 is correspondingly provided with a spiral plate 321 that cooperates with the protrusion 315; the two ends of the adjusting assembly 33 are correspondingly connected to the two rocker arms 316.

[0041] Specifically, two clamping blocks 32 are movably connected to the two ends of the mounting base 11 with corresponding fixing blocks 311, and each connecting post 314 is sleeved in the middle of the corresponding fixing block 311; multiple protrusions 315 are fixedly connected to the corresponding connecting posts 314; the spiral blades 321 are made of a material with high wear resistance and low friction coefficient, and multiple spiral blades 321 are provided at the end of the clamping block 32 near the protrusions 315, and the multiple spiral blades 321 are arranged in a circle, cooperating with the protrusions 315 on the connecting posts 314 to convert the rotational motion into linear motion, thereby controlling the position of the clamping block 32. When the rocker arm 316 drives the connecting post 314 to rotate clockwise, the protrusions 315 advance along the inclined surface of the spiral blades 321, forcing the clamping block 32 to expand outward and clamp the mounting base 11; conversely, counterclockwise rotation will cause the clamping block 32 to retract and release the mounting base 11.

[0042] Furthermore, the adjustment assembly 33 includes a trapezoidal button 331 slidably connected to the connecting seat 313, and hydraulic push rods 332 respectively disposed on both sides of the button 331; the two inclined surfaces of the button 331 are provided with slide rails 333 for controlling the extension and retraction of the hydraulic push rods 332; one end of the two hydraulic push rods 332 is slidably connected to the corresponding slide rails 333, and the other end is connected to the corresponding rocker arm 316.

[0043] The first hook 2 is fixed and released through the engagement of the clamping block 32 and the protrusion with the spiral plate 321 within the C-shaped support assembly 31, and the rotation of the connecting column 314 controlled by the rocker arm 316. The toothed block 23 and the limiting assembly 43 ensure the positional stability of the second hook 4. The button 331 has a trapezoidal structure and is slidably connected to the connecting seat 313 via a telescopic column. The hydraulic push rods 332 on both sides of the trapezoidal button 331 extend and retract via the slide rail 333, thereby adjusting the distance between the two clamping blocks 32 and tightening or loosening the mounting seat 11. Two hydraulic push rods 332 are symmetrically arranged on both sides of the button 331. Each hydraulic push rod 332 has piston rods at both ends, and the piston rods at both ends are connected to the corresponding slide rail 333 and rocker arm 316, respectively. The outer shell of the hydraulic push rod 332 is made of high-strength steel and is detachably connected to the connecting rod 312 via a connector. The hydraulic push rod 332 has an L-shaped structure with an arc-shaped corner. Hydraulic oil is contained within this arc-shaped structure, and piston structures are located at both ends. Pressure applied to one piston structure is evenly transmitted to every point in the fluid, thus transferring pressure to the other piston structure, forcing the piston rod to move. A self-locking mechanism is provided at the connection between the piston rod and the slide rail 333. Once adjusted to the appropriate position, the stop button 331 is activated, and the hydraulic push rod 332 remains in its current position, ensuring hook stability. This self-locking mechanism is prior art and will not be described in detail here. Non-load-bearing components such as the support component 31, button 331, slide rail 333, and connecting block 431 in the locking assembly 3 can be made of high-strength engineering plastics or composite materials to reduce weight and maintain durability.

[0044] Furthermore, a plurality of telescopic rods 322 are connected between the clamping block 32 and the fixing block 311, and a first spring 323 is sleeved on the outside of each of the plurality of telescopic rods 322.

[0045] In use, first manually adjust the angle of the first hook 2, then press button 331 and push the rocker arm 316 to move. At this time, the connecting column 314 rotates, which makes the two clamping blocks 32 close to the mounting base 11 to fix the angle of the first hook 2.

[0046] Working principle: When button 331 is pressed, the inclined structure of slide rail 333 drives the piston rods of two hydraulic push rods 332 to move towards each other, while the outer casing remains stationary. The hydraulic oil transmits pressure to the piston rod connected to rocker arm 316. This piston rod pushes rocker arm 316 to move, causing connecting column 314 to rotate, while fixed block 311 remains stationary. Protrusion 315 advances along the inclined surface of spiral blade 321 as connecting column 314 rotates, thereby pushing spiral blade 321 to move clamping block 32 axially, thus clamping mounting base 11. Conversely, counterclockwise rotation will cause clamping block 32 to retract, releasing mounting base 11.

[0047] Specific application examples

[0048] A four-headed thyroid retractor device, a medical device for thyroid surgery, is designed to help surgeons gain a clearer surgical field of vision, improving the safety and efficiency of the procedure. The four-headed thyroid retractor device successfully pulls away surrounding soft tissues, muscles, and other anatomical structures, providing surgeons with a clear and wide surgical field of vision, reducing the impact on surrounding organs during surgery. This improved field of vision helps surgeons more accurately identify and manage the thyroid gland and its nearby blood vessels, nerves, and other important structures, reducing surgical risks.

[0049] This application provides a four-head thyroid retractor device, the specific operation process of which is as follows: Install the first hook 2 and the second hook 4 onto the mounting base 11 of the opening arm 1; adjust the opening angle of the two opening arms 1, and then use the limiting hole 5 and the limiting block to fix the angle; adjust the first hook 2 to a suitable angle; manually press the button 331 so that the clamping block 32 clamps the corresponding mounting base 11 respectively; that is, when the button 331 is pressed, the inclined structure of the slide rail 333 drives the piston rods of the two hydraulic push rods 332 to move towards each other, while the outer shell remains stationary. The hydraulic oil transmits pressure to the piston rod connected to the rocker arm 316. This piston rod pushes the rocker arm 316 to move, causing the connecting column 314 to rotate, while the fixing block 311 remains stationary. The protrusion 315 moves along the inclined surface of the spiral plate 321 as the connecting column 314 rotates, thereby pushing the spiral plate 321 to make the clamping block 32 move axially, and thus clamp the mounting base 11. Conversely, rotating counterclockwise will cause the clamping block 32 to retract and release the mounting base 11; manually control the lever 434 and adjust the angle of the second hook 4 to a suitable position, then release the lever 434 to lock the angle; that is, first manually press the lever 434 upward to lift the locking block 432, then manually adjust the angle of the second hook 4, and release the lever 434 after it is suitable, and the locking block 432 will automatically lock into the slot.

[0050] In summary, although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A four-headed thyroid retractor device, comprising: Two opening arms (1), each opening arm (1) having a mounting base (11) and a handle (12) at both ends; characterized in that, Each of the mounting bases (11) is rotatably connected to a first hook (2) and a second hook (4); The first hook (2) and the corresponding second hook (4) are detachably connected; The two handles (12) are rotatably connected.

2. The four-headed thyroid retractor device according to claim 1, characterized in that, The first hook (2) includes a collar (21) rotatably sleeved outside the mounting base (11); a first hook arm (22) is connected to the collar (21); The collar (21) is provided with a locking component (3) for fixing the first hook (2) and a toothed block (23) for locking the second hook (4) on its side; the locking component (3) is connected to the annular surface of the toothed block (23).

3. The four-headed thyroid retractor device according to claim 2, characterized in that, The locking component (3) includes a C-shaped support component (31) connected to the toothed block (23). The inner side of the support assembly (31) is movably connected to two clamping blocks (32) for clamping the mounting base (11), and the outer side is movably connected to an adjustment assembly (33) for controlling the distance between the two clamping blocks (32).

4. The four-headed thyroid retractor device according to claim 3, characterized in that, The support assembly (31) includes two fixing blocks (311), a connecting rod (312) disposed between the two fixing blocks (311), and a connecting seat (313) sleeved on the connecting rod (312). Two fixing blocks (311) are located on both sides of the mounting base (11); a connecting column (314) is rotatably passed through each fixing block (311); each connecting column (314) has multiple protrusions (315) at one end and a rocker arm (316) at the other end for controlling the rotation of the connecting column (314). Each of the clamping blocks (32) is provided with a spiral plate (321) that cooperates with the protrusion (315); the two ends of the adjustment component (33) are connected to the two rockers (316).

5. The four-headed thyroid retractor device according to claim 4, characterized in that, The adjustment component (33) includes a trapezoidal button (331) that is slidably connected to the connecting seat (313), and hydraulic push rods (332) respectively disposed on both sides of the button (331). The button (331) has two inclined surfaces with slide rails (333) for controlling the extension and retraction of the hydraulic push rods (332); one end of each hydraulic push rod (332) is slidably connected to the corresponding slide rail (333), and the other end is connected to the corresponding rocker arm (316).

6. The four-headed thyroid retractor device according to claim 5, characterized in that, Multiple telescopic rods (322) are connected between the clamping block (32) and the fixing block (311), and a first spring (323) is sleeved on the outside of each of the multiple telescopic rods (322).

7. The four-headed thyroid retractor device according to claim 6, characterized in that, The second hook (4) includes a shaft ring (41) rotatably mounted on the mounting base (11); the side end of the shaft ring (41) is provided with a limiting component (43) for locking the toothed block (23); a second hook arm (42) is connected to the shaft ring (41).

8. The four-headed thyroid retractor device according to claim 7, characterized in that, The limiting component (43) includes a connecting block (431) and a locking block (432) that slides through the connecting block (431) and matches the toothed block (23); a second spring (433) is provided between the locking block (432) and the connecting block (431).

9. The four-headed thyroid retractor device according to claim 8, characterized in that, The card block (432) is connected to a lever (434) on one side and a limiting member (435) on the other side; the lever (434) slides through the connecting block (431); the limiting member (435) is slidably connected to the connecting block (431).

10. The four-headed thyroid retractor device according to claim 1, characterized in that, The two opening arms (1) are hinged together, and one of the opening arms (1) is provided with a limiting hole (5) and the other opening arm (1) is provided with a limiting block (6).

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