Special retractor for thyroid surgery incision

Abstract

The utility model belongs to the technical field of thyroid surgery, and provides a special retractor for a thyroid surgery incision, which comprises an equipment box body, a rotating shaft is vertically and rotatably arranged in the equipment box body, a ratchet and pawl structure is arranged between the peripheral side of the rotating shaft and the equipment box body, and a pawl control structure is arranged at the top of the ratchet and pawl structure. A reverse displacement structure is further arranged between the peripheral side of the rotating shaft and the equipment box body, and two drag hook plates are arranged at the bottom end of the reverse displacement structure; the ratchet wheel and pawl structure comprises a pawl rotationally arranged on one side in the equipment box body; the pawl control structure comprises a clamping spring arranged on one side of the pawl. The problems that according to existing equipment, a first fixing plate and a second fixing plate need to be oppositely pulled, the distance between a first drag hook and a second drag hook is adjusted, and then a threaded rod and a nut are matched to fix the first drag hook and the second drag hook, but locking or loosening behaviors are inconvenient to conduct by hands through threaded fit of the threaded rod and the nut; and the use convenience of the equipment is reduced.

Description

Technical Field

[0001] This utility model relates to the field of thyroid surgery, and in particular to a special retractor for thyroid surgical incisions. Background Technology

[0002] Thyroid surgery is a procedure performed on the throat and neck. During thyroid surgery, a thyroid retractor is used to widen the incision and expose the surgical field in order to have more operating space for better operation.

[0003] A search revealed that patent CN221865812U discloses a special retractor for thyroid surgical incisions, comprising a first retractor and a second retractor. A first fixing plate and a second fixing plate are symmetrically and alternately installed on opposite sides of the first and second retractors. A sliding groove is formed through the second fixing plate. Through the combined use of the sliding groove, threaded rod, and nut, the distance between the first and second retractors can be easily adjusted, increasing the stability when the first and second retractors are connected. Even if the threaded rod and nut are accidentally touched, the distance between the first and second retractors will not be adjusted, thus avoiding interference with medical personnel's operation and preventing harm to the patient. Furthermore, by sliding the threaded rod on the sliding groove, the distance between the first and second retractors can be adjusted arbitrarily.

[0004] The existing equipment requires pulling the first and second fixing plates together, adjusting the distance between the first and second hooks, and then fixing the first and second hooks by engaging the threaded rod and nut. However, the threaded engagement of the threaded rod and nut makes it inconvenient to lock or loosen the equipment by hand, thus reducing the ease of use of the equipment.

[0005] Therefore, it is necessary to provide a special retractor for thyroid surgical incisions to solve the above-mentioned technical problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a special retractor for thyroid surgical incisions.

[0007] This utility model provides a special retractor for thyroid surgery incisions, including a device housing. A rotating shaft is vertically rotatable inside the device housing. A ratchet and pawl structure is provided between the circumference of the rotating shaft and the device housing. A pawl control structure is provided at the top of the ratchet and pawl structure. A reverse displacement structure is also provided between the circumference of the rotating shaft and the device housing. Two hook plates are provided at the bottom end of the reverse displacement structure.

[0008] The ratchet and pawl structure includes a pawl that is rotatably disposed on one side inside the device housing;

[0009] The pawl control structure includes a clamping spring disposed on one side of the pawl, the other end of the clamping spring being fixedly disposed on the device housing, a driven push block being fixedly disposed on the top of the pawl, a downward sliding rod being slidably inserted through the top of the device housing, the bottom end of the downward sliding rod extending to the driven push block, a return spring being sleeved on the outside of the downward sliding rod, a spring piece being disposed on one bottom side of the downward sliding rod, and a locking block being fixedly disposed on the top of the inside of the device housing, the bottom end of the locking block being correspondingly disposed on the top of the spring piece.

[0010] To avoid excessive repositioning of the downward sliding rod, this utility model provides a special pull hook for thyroid surgical incisions. Preferably, the top of the repositioning spring is fixedly connected to the downward sliding rod, and the bottom of the repositioning spring is fixedly connected to the device housing.

[0011] In order to achieve the effect of unidirectional limiting, this utility model provides a special retractor for thyroid surgery incisions. Preferably, the ratchet and pawl structure further includes a ratchet fixedly sleeved on the middle of the circumference of the rotating shaft, and the pawl is connected to the circumference of the ratchet.

[0012] To achieve synchronous expansion, this utility model provides a special retractor for thyroid surgical incisions. Preferably, the reverse displacement structure includes a gear fixedly sleeved on the bottom of the circumferential side of the rotating shaft. Gear racks are meshed on both sides of the gear. A connecting block is provided at the middle of the two gear racks at their opposite ends. Slide grooves are provided through both sides of the device housing. The two slide grooves correspond to the two connecting blocks. The bottom ends of the two connecting blocks extend through the corresponding slide grooves. The bottom ends of the two connecting blocks are fixedly disposed on the top side of the corresponding retractor plate.

[0013] In order to achieve the effect of stabilizing and guiding the displacement of the gear rack, this utility model provides a special pull hook for thyroid surgery incision. Preferably, both ends of the two gear racks are clamped with guide plates, and the ends of the four guide plates that are far apart from each other are respectively fixed to the device box.

[0014] In order to achieve the effect of external control, this utility model provides a special retractor for thyroid surgery incisions. Preferably, the top of the rotating shaft extends through the device housing, a control knob is coaxially fixedly installed on the top of the rotating shaft, and a control handle is fixedly installed on one side of the top of the device housing.

[0015] In order to avoid the retractor plate scratching the wound, this utility model provides a special retractor for thyroid surgery incision. Preferably, the ends of the two retractor plates that are far apart from each other are provided with rounded chamfers, and the ends of the two retractor plates that are far apart from each other are provided with silicone pads.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This new type of retractor for thyroid surgery incisions utilizes a ratchet and pawl structure with a pawl control mechanism. On one hand, a downward-moving slide bar presses against the driven push block at the top of the pawl, disengaging the pawl from the ratchet. A spring and a locking block then hold the slide bar in place, releasing the pawl from restricting ratchet rotation. On the other hand, a clamping spring elastically controls the pawl to engage with the ratchet, limiting unidirectional rotation. This design solves the problem of existing equipment requiring the adjustment of the distance between the first and second fixing plates and the first and second retractors, followed by fixing them using a threaded rod and nut. However, the threaded engagement of the threaded rod and nut makes manual locking or loosening inconvenient, reducing the ease of use of the equipment.

[0018] This new type of hook for thyroid surgery incisions features a reverse displacement hook structure that allows the gear to mesh synchronously with two gear racks, enabling the two gear racks to slide synchronously in opposite directions. This solves the problem of existing equipment requiring two people to pull the first and second fixing plates and adjust the distance between the first and second hooks to widen the incision, making the adjustment of the distance extremely cumbersome. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a preferred embodiment of a thyroid surgery incision retractor provided by this utility model;

[0020] Figure 2 for Figure 1 The diagram shows a cross-sectional view (AA).

[0021] Figure 3 for Figure 1 The diagram shows the internal top view of the structure.

[0022] Figure 4 for Figure 2 A schematic diagram of structure B is shown below;

[0023] Figure 5 for Figure 3 The diagram shows the structure of the ratchet and pawl mechanism.

[0024] The following are the labeling elements in the diagram: 1. Equipment housing; 2. Rotating shaft; 3. Ratchet and pawl structure; 301. Ratchet; 302. Pawl; 4. Pawl control structure; 401. Clamping spring; 402. Driven push block; 403. Lowering slide bar; 404. Return spring; 405. Spring piece; 406. Locking block; 5. Reverse displacement structure; 501. Gear; 502. Gear rack; 503. Connecting block; 504. Slide groove; 505. Guide clamp; 6. Hook plate; 7. Control knob; 8. Operating handle. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A special retractor for thyroid surgery incisions is provided, comprising a device housing 1, a vertically rotating shaft 2 inside the device housing 1, a ratchet and pawl structure 3 between the circumference of the rotating shaft 2 and the device housing 1, a pawl control structure 4 at the top of the ratchet and pawl structure 3, a reverse displacement structure 5 between the circumference of the rotating shaft 2 and the device housing 1, two hook plates 6 at the bottom of the reverse displacement structure 5, each hook plate 6 having a rounded chamfer at its far end, and a silicone pad at each far end of the hook plate 6, the top of the rotating shaft 2 extending through the device housing 1, a control knob 7 coaxially fixed at the top of the rotating shaft 2, and a control handle 8 fixedly fixed on one side of the top of the device housing 1.

[0027] It should be noted that the ends of the two hook plates 6 that are far apart from each other are rounded and chamfered to prevent the edges of the two hook plates 6 from being too sharp and causing scratches to the patient's wound. The ends of the two hook plates 6 that are far apart from each other are also equipped with silicone pads to reduce the impact on the patient's wound and reduce the possibility of damage. The manual rotation control knob 7 controls the synchronous rotation of the rotating shaft 2, and the placement angle of the two hook plates 6 can also be adjusted by manually holding the control handle 8.

[0028] In the specific implementation process, refer to Figure 3 and Figure 5 As shown, the ratchet and pawl structure 3 includes a pawl 302 rotatably disposed on one side inside the device housing 1. The ratchet and pawl structure 3 also includes a ratchet 301 fixedly sleeved on the middle of the circumference of the rotating shaft 2, and the pawl 302 is connected to the circumference of the ratchet 301.

[0029] It should be noted that when the rotating shaft 2 rotates counterclockwise with the ratchet 301, one end of the pawl 302 engages with the evenly spaced grooves around the ratchet 301, which can restrict the ratchet 301 from rotating clockwise.

[0030] In the specific implementation process, refer to Figure 2 and Figure 4As shown, the pawl control structure 4 includes a clamping spring 401 disposed on one side of the pawl 302, the other end of the clamping spring 401 being fixedly disposed on the device housing 1, a driven push block 402 being fixedly disposed on the top of the pawl 302, a downward sliding rod 403 being slidably inserted through the top of the device housing 1, the bottom end of the downward sliding rod 403 extending to the driven push block 402, a return spring 404 being sleeved on the outside of the downward sliding rod 403, the top of the return spring 404 being fixedly connected to the downward sliding rod 403, the bottom end of the return spring 404 being fixedly connected to the device housing 1, a spring piece 405 being disposed on one side of the bottom end of the downward sliding rod 403, and a locking block 406 being fixedly disposed inside the top of the device housing 1, the bottom end of the locking block 406 being correspondingly disposed on the top of the spring piece 405.

[0031] It should be noted that the clamping spring 401 controls the pawl 302 to swing due to its elasticity, so that one end of the pawl 302 engages with the evenly spaced slots around the ratchet 301. This restricts the ratchet 301 from rotating clockwise, allowing for unidirectional control of the two hook plates 6 to move away from each other and support the wound. When the two hook plates 6 need to release their support from the wound, the downward sliding rod 403 presses down to squeeze the driven push block 402 fixed at the top of the pawl 302, controlling the pawl 302 to swing away from the slots around the ratchet 301. At the same time, the downward sliding rod 403 squeezes the return spring 404, causing the spring piece 405 to elastically engage with the bottom of the locking block 406, thus restricting the pawl 302 from returning to its original position. The two hook plates 6 lose power and are squeezed together by the wound.

[0032] In the specific implementation process, refer to Figure 2 and Figure 3 As shown, the reverse displacement structure 5 includes a gear 501 fixedly sleeved on the bottom of the circumference of the rotating shaft 2. Gear racks 502 mesh with each other on both sides of the gear 501. A connecting block 503 is provided in the middle of the two gear racks 502 at their far ends. Slide grooves 504 are provided through both sides of the equipment box 1. Each slide groove 504 corresponds to a connecting block 503. The bottom ends of the two connecting blocks 503 extend through the corresponding slide grooves 504. The bottom ends of the two connecting blocks 503 are fixedly set on the top side of the corresponding hook plate 6. Guide clamps 505 are held at both ends of the two gear racks 502. The far ends of the four guide clamps 505 are fixedly set on the equipment box 1.

[0033] It should be noted that: rotating the rotating shaft 2 controls the rotation of the gear 501 to engage with the two gear racks 502 in a bidirectional manner, controlling the two gear racks 502 to move closer or further away synchronously. The two gear racks 502 then transmit the sliding motion directly to the two hook plates 6 through the two connecting blocks 503, so as to achieve the purpose of synchronously approaching and detaching from the wound or synchronously moving away from and expanding the wound.

[0034] The working principle of the thyroid surgery incision retractor provided by this utility model is as follows:

[0035] In use, the two hook plates 6 are placed on the wound by controlling the handle 8. Rotating the control knob 7 counterclockwise controls the rotating shaft 2 to rotate synchronously. The clamping spring 401 controls the pawl 302 to swing and finally engage in the slot on the side of the ratchet 301, preventing clockwise rotation of the rotating shaft 2. The rotating shaft 2 controls the gear 501 to rotate, and then the gear 501 engages bidirectionally with the two gear racks 502, causing the two gear racks 502 to slide away from each other. The two connecting blocks 503 directly transmit the sliding motion to the two hook plates 6, allowing the two hook plates 6 to expand the wound. After the examination is complete, pressing down the sliding rod 403 compresses the top of the pawl 302 to secure it. The driven push block 402 controls the pawl 302 to swing and disengage from the slot on the side of the ratchet 301. At the same time, the downward sliding rod 403 presses the return spring 404, causing the spring piece 405 to elastically engage with the bottom of the locking block 406, thus limiting the pawl 302 to return to its original position. The two hook plates 6 lose power and are squeezed together by the wound. After the downward sliding rod 403 is pressed down again to the elastic limit of the return spring 404, the return spring 404 controls the downward sliding rod 403 to move upward, and the spring piece 405 disengages from the locking block 406, releasing the limitation on the pawl 302. The clamping spring 401 controls the pawl 302 to swing and finally engage with the slot on the side of the ratchet 301.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A retractor for thyroid surgical incisions, characterized in that, The device includes a housing (1), and a rotating shaft (2) is vertically rotatable inside the housing (1). A ratchet and pawl structure (3) is provided between the circumference of the rotating shaft (2) and the housing (1). A pawl control structure (4) is provided at the top of the ratchet and pawl structure (3). A reverse displacement structure (5) is also provided between the circumference of the rotating shaft (2) and the housing (1). Two hook plates (6) are provided at the bottom of the reverse displacement structure (5). The ratchet and pawl structure (3) includes a pawl (302) that is rotatably disposed on one side inside the device housing (1); The pawl control structure (4) includes a clamping spring (401) disposed on one side of the pawl (302), the other end of the clamping spring (401) being fixedly disposed on the device housing (1), a driven push block (402) being fixedly disposed on the top of the pawl (302), a downward sliding rod (403) being slidably inserted through the top of the device housing (1), the bottom end of the downward sliding rod (403) extending to the driven push block (402), a return spring (404) being sleeved on the outside of the downward sliding rod (403), a spring piece (405) being disposed on one side of the bottom end of the downward sliding rod (403), and a locking block (406) being fixedly disposed on the top of the inside of the device housing (1), the bottom end of the locking block (406) being correspondingly disposed on the top of the spring piece (405).

2. The thyroid surgical incision retractor according to claim 1, characterized in that, The top of the return spring (404) is fixedly connected to the downward sliding rod (403), and the bottom of the return spring (404) is fixedly connected to the device housing (1).

3. The thyroid surgical incision retractor according to claim 1, characterized in that, The ratchet and pawl structure (3) further includes a ratchet (301) fixedly sleeved on the middle of the circumference of the rotating shaft (2), and the pawl (302) is connected to the circumference of the ratchet (301).

4. The thyroid surgical incision retractor according to claim 1, characterized in that, The reverse displacement structure (5) includes a gear (501) fixedly sleeved on the bottom of the circumference of the rotating shaft (2). Gear racks (502) are respectively meshed on both sides of the gear (501). A connecting block (503) is provided at the middle of the two gear racks (502) that are far apart from each other. Slide grooves (504) are provided through both sides of the equipment box (1). The two slide grooves (504) correspond to the two connecting blocks (503). The bottom ends of the two connecting blocks (503) extend through the corresponding slide grooves (504). The bottom ends of the two connecting blocks (503) are fixedly set on the top side of the corresponding hook plate (6).

5. A retractor for thyroid surgical incisions according to claim 4, characterized in that, Both ends of the two gear racks (502) are clamped with guide plates (505), and the four guide plates (505) are respectively fixed to the equipment housing (1) at their ends that are far apart from each other.

6. A retractor for thyroid surgical incisions according to claim 1, characterized in that, The top of the rotating shaft (2) extends through the device housing (1), and a control knob (7) is coaxially fixedly provided on the top of the rotating shaft (2). A control handle (8) is fixedly provided on one side of the top of the device housing (1).

7. A retractor for thyroid surgical incisions according to claim 1, characterized in that, Both of the two hook plates (6) have rounded chamfers at their far ends, and both of the two hook plates (6) have silicone pads at their far ends.

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