davidson retractor

Abstract

The utility model relates to the technical field of openers, disclose Davy's openers, main frame mechanism and support board mechanism, main frame mechanism includes main board, the outside wall bottom fixed connection of main board has U type frame, the outer wall of U type frame forms the recess of arc shape, and the inside of main board is slidably sleeved in support board mechanism, and the upper top of support board mechanism is provided with the limiting mechanism of stable main frame mechanism work, through being provided with the recess, can avoid the block of cutter head due to U type frame, thereby leading to the situation that the tissue of rear nare top cannot be completely removed, set up the limiting mechanism simultaneously, can avoid the drop of limiting plate in the use process, thereby influenced operation, wherein the limiting mechanism adopts two bend rings, and the bend ring is limited through the horizontal plate, ensures that the bend ring does not produce the movement, ensures that as long as the suspension is completed, no matter what position also cannot drop, improves the security in the use process, guarantees the suspension effect simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of mouth opener technology, specifically to the Davydau mouth opener. Background Technology

[0002] The Devin mouth opener, also known as the David's mouth opener, is an important instrument commonly used in the medical field, especially in oral and otolaryngological surgeries. It was originally designed to address the need to open the patient's mouth during surgery, allowing surgeons to clearly observe the surgical site and perform precise procedures. Adenoidectomy is a common procedure in otolaryngology-head and neck surgery, and low-temperature plasma adenoidectomy is a popular surgical approach with several advantages over traditional surgery. The Devin's mouth opener is a routinely used exposure aid in adenoidectomy.

[0003] In adenoidectomy, a plasma scalpel is inserted into the nasopharynx through the mouth to remove the hypertrophic adenoids. Since adenoid tissue is widely distributed, the position of the plasma scalpel tip needs to be adjusted during the procedure. Especially when excessively hypertrophic adenoids protrude into the posterior nasal cavity, the plasma scalpel tip and mouth gag can obstruct the removal of this tissue. Particularly when removing adenoid tissue from the top of the right posterior nasal cavity, the plasma scalpel needs to be deflected towards the left corner of the mouth. The rounded connecting part of the Davydauni mouth gag prevents further deflection of the plasma scalpel tip, preventing complete removal of the tissue at the top of the posterior nasal cavity. Furthermore, existing mouth gags have shortcomings in fixation and positioning. Some mouth gags lack reliable positioning mechanisms, causing the positioning plate to easily detach or shift during use. This not only interferes with the smooth progress of the surgery but may also cause additional harm to the patient. Utility Model Content

[0004] The purpose of this invention is to provide a Davydauni mouth opener that solves the problem that the arc-shaped connecting part of the Davydauni mouth opener will block the further deflection of the plasma blade, making it impossible for the blade to completely remove the tissue at the top of the posterior nasal cavity.

[0005] This utility model provides the following technical solution: a Davydau opening device, a main frame mechanism and a support plate mechanism. The main frame mechanism includes a main board, and a U-shaped frame is fixedly connected to the bottom of the outer side wall of the main board. The outer wall of the U-shaped frame forms an arc-shaped groove. The support plate mechanism is slidably sleeved inside the main board. A limiting mechanism for stabilizing the operation of the main frame mechanism is provided at the top of the support plate mechanism.

[0006] Preferably, the support plate mechanism includes a tongue depressor that is slidably sleeved inside the main plate, and a limiting plate is fixedly connected to the lower bottom end of the tongue depressor. The limiting plate has a plurality of slots evenly provided on the side away from the tongue depressor.

[0007] Preferably, the limiting mechanism includes an auxiliary frame fixedly connected to the top of the limiting plate. An outer support is symmetrically fixedly connected to the top of the auxiliary frame. A bent ring is rotatably sleeved inside the outer support. Several limiting springs are fixedly connected inside the auxiliary frame. A horizontal plate is slidably connected inside the auxiliary frame at one side of the limiting springs, and the horizontal plate is fixedly connected to the end of the limiting spring. A push rod is slidably sleeved inside the auxiliary frame at the outer side wall of the horizontal plate, and the push rod extends to the outer side wall of the auxiliary frame.

[0008] Preferably, the end of the bent ring is provided with a limiting groove that cooperates with the end of the horizontal plate, and the end of the bent ring extends into the interior of the auxiliary frame.

[0009] Preferably, the outer side wall of the motherboard has a through groove, and the outer surface of the motherboard is symmetrically and fixedly connected to a side bracket below the through groove. The outer side wall of the motherboard is fixedly connected to a fixed bracket below the side bracket.

[0010] Preferably, the side frame is provided with a pressure plate inside, and a movable bracket is fixedly connected to the side of the pressure plate near the main board. The movable bracket is rotatably connected to the inside of the fixed bracket. A tension spring is fixedly connected to the side of the pressure plate near the main board, and the end of the tension spring is fixedly connected to the outer wall of the main board.

[0011] Preferably, the end of the pressure plate is located in the through groove and is engaged inside the groove, and the end of the U-shaped frame is fixedly connected to a tooth-hanging ring for limiting the position of human teeth.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] In this invention, the groove prevents the scalpel from being blocked by the U-shaped frame, thus avoiding the inability to completely remove the tissue at the top of the posterior nasal cavity. A limiting mechanism is also included to prevent the limiting plate from detaching during use, which would affect the surgery. This limiting mechanism uses two bent rings, which are limited by a horizontal plate to ensure they do not move. This ensures that once suspended, they will not detach regardless of their position, improving safety during use and ensuring effective suspension. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of the Davyd's mouth opener;

[0015] Figure 2 This is a schematic diagram of the main frame mechanism in a Davydau opening device;

[0016] Figure 3 A schematic diagram of the support plate mechanism in a Davydau opening device;

[0017] Figure 4 This is a schematic diagram of the overall disassembled structure of the Davyd's mouth opener;

[0018] Figure 5 This is a schematic diagram of the auxiliary frame structure in a Davydau opening device.

[0019] In the diagram: 1. Main frame mechanism; 11. Main board; 12. U-shaped frame; 13. Groove; 14. Hanging tooth ring; 15. Pressure plate; 151. Movable bracket; 16. Through slot; 17. Side frame; 18. Tension spring; 19. Fixed bracket; 2. Support plate mechanism; 21. Tongue plate; 22. Limiting plate; 23. Slot; 3. Limiting mechanism; 31. Auxiliary frame; 32. Outer bracket; 33. Bend ring; 34. Limiting slot; 35. Limiting spring; 36. Horizontal plate; 37. Push rod. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a technical solution: a Davyd's mouth opener, a main frame mechanism 1 and a support plate mechanism 2. The main frame mechanism 1 includes a main board 11, and a U-shaped frame 12 is fixedly connected to the bottom of the outer side wall of the main board 11. The outer wall of the U-shaped frame 12 forms an arc-shaped groove 13. The support plate mechanism 2 is slidably sleeved inside the main board 11. A limiting mechanism 3 for stabilizing the operation of the main frame mechanism 1 is provided at the top of the support plate mechanism 2. The support plate mechanism 2 includes a tongue depressor 21 slidably sleeved inside the main board 11. A limiting plate 22 is fixedly connected to the bottom of the tongue depressor 21. A plurality of slots 23 are evenly opened on the side of the limiting plate 22 away from the tongue depressor 21.

[0022] It should be noted that the sliding sleeve design of the main board 11 and the support plate mechanism 2 allows the tongue depressor 21 to be flexibly adjusted according to the patient's oral structure, ensuring that the mouth opener can closely fit the oral shape of different patients, improving the comfort and stability of use. At the same time, this sliding design also makes it easy for medical staff to quickly adjust the size of the mouth opener as needed during the operation to adapt to different surgical needs. The arc-shaped groove 13 formed on the outer wall of the U-shaped frame 12 not only optimizes the operating space of surgical instruments and reduces obstacles during the operation, but more importantly, this design also takes into account the diversity and complexity of surgical instruments. The arc-shaped groove 13 can adapt to surgical instruments of different shapes and sizes, ensuring that they can be smoothly and unobstructedly entered and operated during the operation, thereby improving the accuracy and efficiency of the operation.

[0023] like Figure 4 and Figure 5As shown, the limiting mechanism 3 includes an auxiliary frame 31 fixedly connected to the top of the limiting plate 22. An outer support 32 is symmetrically fixedly connected to the top of the auxiliary frame 31. A bent ring 33 is rotatably sleeved inside the outer support 32. Several limiting springs 35 are fixedly connected inside the auxiliary frame 31. A horizontal plate 36 is slidably connected inside the auxiliary frame 31 at one side of the limiting springs 35, and the horizontal plate 36 is fixedly connected to the end of the limiting springs 35. A push rod 37 is slidably sleeved inside the auxiliary frame 31 at the outer side wall of the horizontal plate 36, and the push rod 37 extends to the outer side wall of the auxiliary frame 31. A limiting groove 34 that cooperates with the end of the horizontal plate 36 is opened at the end of the bent ring 33, and the end of the bent ring 33 extends into the interior of the auxiliary frame 31.

[0024] It should be noted that the limiting mechanism 3, through the coordinated action of the auxiliary frame 31, the outer support 32, the bent ring 33, the limiting spring 35, the horizontal plate 36, and the push rod 37, achieves stable limiting of the support plate mechanism 2, effectively preventing the mouth opening device from accidentally falling off or shifting during surgery. The design of the bent ring 33 rotating and sleeved inside the outer support 32 allows the bent ring 33 to flexibly adjust its angle according to actual needs, ensuring a tight fit with the operating table or other fixed structures, providing a stable support point for the mouth opening device. Under the elastic force of the limiting spring 35, the horizontal plate 36 always maintains a pressing state on the end of the bent ring 33, ensuring the limiting of the bent ring 33. The groove 34 fits tightly with the end of the horizontal plate 36, preventing loosening or detachment. This not only improves the stability of the mouth opener but also effectively reduces the operational risks caused by displacement of the mouth opener during surgery. In addition, the push rod 37 allows medical staff to easily adjust the position of the horizontal plate 36 as needed, thereby controlling the limiting state of the curved ring 33. When it is necessary to fix the mouth opener, simply push the push rod 37 inward to press the horizontal plate 36 against the limiting groove 34 of the curved ring 33. When it is necessary to adjust the position of the mouth opener, simply pull the push rod 37 gently to release the limiting effect of the horizontal plate 36 on the curved ring 33, allowing for flexible movement of the mouth opener.

[0025] like Figure 1 , Figure 2 and Figure 4 As shown, a through groove 16 is provided on the outer side wall of the main board 11. A side frame 17 is symmetrically fixedly connected to the outer surface of the main board 11 below the through groove 16. A fixed bracket 19 is fixedly connected to the outer side wall of the main board 11 below the side frame 17. A pressure plate 15 is provided inside the side frame 17. A movable bracket 151 is fixedly connected to the side of the pressure plate 15 near the main board 11, and the movable bracket 151 is rotatably sleeved with the inside of the fixed bracket 19. A tension spring 18 is fixedly connected to the side of the pressure plate 15 near the main board 11, and the end of the tension spring 18 is fixedly connected to the outer side wall of the main board 11. The end of the pressure plate 15 is located in the through groove 16 and is snapped into the inside of the slot 23. A tooth-hanging ring 14 for limiting the human teeth is fixedly connected to the end of the U-shaped frame 12.

[0026] It should be noted that when the pressure plate 15 is pressed against the main plate 11 under the action of the tension spring 18 and passes through the through slot 16 and is locked into the slot 23 on the limiting plate 22, this structure ensures that the support plate mechanism 2 is stably locked in the main frame mechanism 1, effectively preventing operational errors or patient discomfort caused by accidental slippage of the support plate mechanism during the operation. The synergistic effect of the side frame 17 and the fixed bracket 19 not only provides a stable support structure for the pressure plate 15, but also realizes the flexible movement of the pressure plate 15 in the vertical direction through the rotating sleeve design of the movable bracket 151. The introduction of the tension spring 18 not only provides a stable reset force for the pressure plate 15, but also ensures that the pressure plate 15 can quickly return to the initial position after release, preparing for the next locking operation. The toothed ring 14 can fit tightly against the patient's teeth, effectively preventing the mouth opener from accidentally falling off or shifting during the operation, thereby ensuring the smooth progress of the operation.

[0027] Working Principle: The arc-shaped groove 13 formed by the outer wall of the U-shaped frame 12 effectively solves the problem that may be encountered when using traditional mouth openers—that is, the blade cannot fully reach the tissue at the top of the posterior nasal cavity due to the obstruction of the U-shaped frame. This ensures the thoroughness and precision of the surgical procedure. The presence of the groove 13 provides unobstructed operating space for surgical instruments, optimizes the surgical field of vision, and reduces the difficulty and potential risks of the surgery. This device is equipped with a limiting mechanism 3, which greatly enhances the stability and safety of the surgery by eliminating the risk of detachment during use. The core of the limiting mechanism 3 is the use of two bent rings 33, which are rotatably sleeved on the auxiliary frame 31 through the outer bracket 32. The ends of the bent rings 33 are specially provided with limiting grooves 34, which cooperate with the ends of the horizontal plate 36. The limiting spring 35 keeps the bent ring 33 stably positioned, ensuring that the bent ring 33 remains fixed even if it is disturbed by external forces during operation and will not fall off accidentally. The design of the push rod 37 allows medical staff to adjust the position of the horizontal plate 36 as needed, thereby flexibly controlling the locking and releasing of the bent ring 33, providing additional flexibility and controllability for the operation. In addition, the use of the slot 23 on the limiting plate 22 and the pressure plate 15 further consolidates the stability of the support plate mechanism 2. The pressure plate 15 can be tightly locked into the slot 23 when needed through the rotational connection between the movable bracket 151 and the fixed bracket 19, as well as the tension of the tension spring 18, effectively preventing the support plate mechanism 2 from sliding accidentally in the main frame mechanism 1, thereby maintaining the stability of the entire opening device structure.

[0028] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A Davydau mouth opener, characterized in that: include: The main frame mechanism (1) and the support plate mechanism (2) are provided. The main frame mechanism (1) includes a main board (11). A U-shaped frame (12) is fixedly connected to the bottom of the outer side wall of the main board (11). An arc-shaped groove (13) is formed on the outer wall of the U-shaped frame (12). The support plate mechanism (2) is slidably sleeved inside the main board (11). A limiting mechanism (3) for stabilizing the operation of the main frame mechanism (1) is provided at the top of the support plate mechanism (2).

2. The Davydauni mouth opener according to claim 1, characterized in that: The support plate mechanism (2) includes a tongue depressor (21) that is slidably sleeved inside the main plate (11). The lower bottom end of the tongue depressor (21) is fixedly connected to a limiting plate (22). The limiting plate (22) has a plurality of slots (23) evenly distributed on the side away from the tongue depressor (21).

3. The Davydauth mouth opener according to claim 1, characterized in that: The limiting mechanism (3) includes an auxiliary frame (31) fixedly connected to the top of the limiting plate (22). An outer support (32) is symmetrically fixedly connected to the top of the auxiliary frame (31). A bent ring (33) is rotatably sleeved inside the outer support (32). Several limiting springs (35) are fixedly connected inside the auxiliary frame (31). A horizontal plate (36) is slidably connected inside the auxiliary frame (31) at one side of the limiting springs (35). The horizontal plate (36) is fixedly connected to the end of the limiting springs (35). A push rod (37) is slidably sleeved inside the auxiliary frame (31) at the outer side wall of the horizontal plate (36). The push rod (37) extends to the outer side wall of the auxiliary frame (31).

4. The Davydauni mouth opener according to claim 3, characterized in that: The end of the bend (33) is provided with a limiting groove (34) that cooperates with the end of the cross plate (36), and the end of the bend (33) extends into the interior of the auxiliary frame (31).

5. The Davydauth mouth opener according to claim 1, characterized in that: The outer side wall of the main board (11) is provided with a through groove (16), and the outer surface of the main board (11) is symmetrically fixedly connected to a side frame (17) below the through groove (16). The outer side wall of the main board (11) is fixedly connected to a fixed bracket (19) below the side frame (17).

6. The Davydauth mouth opener according to claim 5, characterized in that: The side frame (17) is provided with a pressure plate (15) inside. A movable bracket (151) is fixedly connected to the side of the pressure plate (15) near the main board (11), and the movable bracket (151) is rotatably sleeved with the inside of the fixed bracket (19). A tension spring (18) is fixedly connected to the side of the pressure plate (15) near the main board (11), and the end of the tension spring (18) is fixedly connected to the outer wall of the main board (11).

7. The Davydauth mouth opener according to claim 6, characterized in that: The end of the pressure plate (15) is located in the through groove (16) and is engaged inside the slot (23). The end of the U-shaped frame (12) is fixedly connected to a tooth-hanging ring (14) for limiting the position of human teeth.

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