A medical dilator with locking function
By designing a medical expander with a locking function, employing a hinged expander rod and locking mechanism, combined with a silicone layer and a conical funnel design, the problems of burr damage and operational difficulty of existing expanders are solved, thereby improving patient comfort and surgical safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NORTH SICHUAN MEDICAL COLLEGE
- Filing Date
- 2025-01-21
- Publication Date
- 2026-05-26
AI Technical Summary
Existing medical expanders have problems such as burrs that can easily injure patients, high friction that increases patient pain, and non-disposable expanders that lack a locking structure, which increases the difficulty of operation for medical staff and the risk to surgical safety.
A medical expander with a locking function was designed. The first and second expansion rods are hinged to each other. The expansion part is controlled and fixed by a spring plate and a locking mechanism. The outer side of the expansion part is covered with a silicone layer to reduce hard contact friction. The shape of the expansion part is designed as a conical funnel to avoid accidental injury.
This technology enables convenient operation and fixation of the expander, reduces patient discomfort, lowers surgical risks, and improves the convenience and safety of the procedure.
Smart Images
Figure CN224269356U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically to a medical expander with a locking function. Background Technology
[0002] Currently, disposable medical expanders are made of transparent polystyrene (GPPS) material, injection molded into upper and lower blades, which are then assembled into a product. Due to the good flow properties, high surface hardness, and brittleness of GPPS material, burrs are present after injection molding, which can easily injure patients. The burrs on the surfaces of the upper and lower blades need to be repaired, and the high friction increases patient discomfort during use. For non-disposable expanders, such as the medical expander described in application number CN202120693962.5, the lack of a locking structure means that the size and maintenance of the expansion require constant hand-holding by medical personnel. This undoubtedly increases the difficulty of operation and thus the safety risks of surgery. Utility Model Content
[0003] In view of the above-mentioned shortcomings of the prior art, the present invention provides a medical dilator with locking function to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] A medical expander with a locking function is provided, comprising a first expander rod and a second expander rod, the middle parts of the first expander rod and the second expander rod are hinged to each other, one end of the first expander rod and the second expander rod are respectively provided with a first expander portion and a second expander portion, the other end of the first expander rod and the second expander rod are opened by a spring plate and the first expander portion and the second expander portion are brought closer to each other, and a locking mechanism is provided between the first expander rod and the second expander rod to drive the spring plate to bend and to move the first expander portion and the second expander portion away from each other.
[0006] Furthermore, the first expansion portion and the second expansion portion are symmetrical to each other and close to each other, forming a conical funnel with an elliptical cross section.
[0007] Furthermore, a pair of hinge ears are provided in the middle of both the first and second expansion rods, and the two pairs of hinge ears are rotatably connected by a connecting shaft.
[0008] Furthermore, the locking mechanism includes a sleeve and a threaded rod. One end of the sleeve is fixed to the connecting shaft, and one end of the threaded rod is inserted into the sleeve and threadedly engaged with the sleeve. The other end of the threaded rod passes through the middle of the spring plate, and the other end of the threaded rod is provided with a cylindrical bolt head for abutting against the spring plate.
[0009] Furthermore, the spring sheet is arc-shaped.
[0010] Furthermore, several longitudinal and transverse stripes are provided on the outer surface of the cylindrical bolt head.
[0011] Furthermore, the two pairs of hinged ears are located near the ends where the first expansion portion and the second expansion portion are located.
[0012] Furthermore, the first expansion rod and the second expansion rod are hollow structures, and the cross-sections of the first expansion rod and the second expansion rod are arc-shaped, with the outer arc surfaces of the first expansion rod and the second expansion rod located on opposite sides of each other.
[0013] Furthermore, the outer surfaces of the first expansion portion and the second expansion portion are covered with a silicone layer.
[0014] Furthermore, the medical expander is made of medical-grade stainless steel.
[0015] The beneficial effects of this utility model are as follows:
[0016] 1. This solution allows for manual pressing of the first and second expansion rods, causing the spring sheet to bend and the first and second expansion sections to move away from each other and expand, thereby opening the patient's wound. Simultaneously, once the required space is reached, rotating the cylindrical plug allows it to abut against and limit the bent spring sheet under the axial displacement of the threaded rod, thus fixing and limiting the expansion state of the first and second expansion sections. The operation is convenient, and the expansion state of the first and second expansion sections can be finely adjusted within a certain range using the cylindrical plug, improving its practicality and facilitating the smooth progress of subsequent surgeries.
[0017] 2. The first and second expansion sections of this design together form a conical funnel. The smaller diameter end of the conical funnel facilitates insertion into the patient's wound, while the larger diameter end facilitates the insertion of surgical instruments. Simultaneously, the outer surface and end face of the conical funnel are both smooth arc-shaped, without sharp edges or corners, greatly minimizing the risk of accidental injury when the first and second expansion sections come into contact with the tissue that needs to be expanded. Furthermore, the silicone layer covering the outer surfaces of the first and second expansion sections allows for flexible contact with the tissue being expanded, avoiding pain caused by hard contact or friction during expansion, thus ensuring a comfortable patient experience. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of a medical dilator with a locking function.
[0019] Among them, 1. First expansion rod, 2. Second expansion rod, 3. First expansion part, 4. Second expansion part, 5. Spring plate, 6. Hinge ear, 7. Connecting shaft, 8. Sleeve, 9. Threaded rod, 10. Cylindrical bolt head, 11. Longitudinal and transverse stripes, 12. Conical funnel. Detailed Implementation
[0020] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.
[0021] like Figure 1 As shown, the medical expander with locking function of this solution includes a first expander rod 1 and a second expander rod 2. A pair of hinge ears 6 are provided in the middle of both the first expander rod 1 and the second expander rod 2, and the two pairs of hinge ears 6 are rotatably connected by a connecting shaft 7. A first expander portion 3 and a second expander portion 4 are respectively provided at one end of the first expander rod 1 and the second expander rod 2, and the two pairs of hinge ears 6 are close to the ends where the first expander portion 3 and the second expander portion 4 are located. The other ends of the first expander rod 1 and the second expander rod 2 are opened by a spring plate 5, which brings the first expander portion 3 and the second expander portion 4 closer together. The spring plate 5 is arc-shaped, and both ends of the spring plate 5 are fixedly connected to the first expander rod 1 and the second expander rod 2, respectively. A locking mechanism is provided between the first expander rod 1 and the second expander rod 2 to drive the spring plate 5 to bend and to move the first expander portion 3 and the second expander portion 4 away from each other.
[0022] As an optional implementation, the locking mechanism includes a sleeve 8 and a threaded rod 9. One end of the sleeve 8 is fixed to the connecting shaft 7. One end of the threaded rod 9 is inserted into the sleeve 8 and threadedly engaged with the sleeve 8. The other end of the threaded rod 9 passes through the middle of the spring plate 5, and the other end of the threaded rod 9 is provided with a cylindrical bolt head 10 for abutting against the spring plate 5. The outer surface of the cylindrical bolt head 10 is provided with several longitudinal and transverse stripes 11 for easy turning.
[0023] This solution allows for manual pressing of the first expansion rod 1 and the second expansion rod 2, which causes the spring plate 5 to bend under pressure, and the first expansion section 3 and the second expansion section 4 to move away from each other and expand, thereby opening up the patient's wound. Simultaneously, once the required space is reached, the cylindrical plug 10 can be rotated, causing it to abut against and limit the bent spring plate 5 under the axial displacement of the threaded rod 9. This achieves the limitation and fixation of the expansion state of the first expansion section 3 and the second expansion section 4, and is easy to operate. Furthermore, the expansion state of the first expansion section 3 and the second expansion section 4 can be finely adjusted within a certain range using the cylindrical plug 10, improving its practicality and facilitating the smooth progress of subsequent surgeries.
[0024] As an optional implementation, the first expansion portion 3 and the second expansion portion 4 are symmetrical to each other and close to each other, forming a conical funnel 12 with an elliptical cross-section. The smaller diameter end of the conical funnel 12 facilitates its insertion into the patient's wound, while the larger diameter end facilitates the insertion of surgical instruments. At the same time, the outer surface and end face of the conical funnel 12 are both rounded arc-shaped, without sharp edges or corners, which greatly reduces the risk of accidental injury when the first expansion portion 3 and the second expansion portion 4 come into contact with the patient's tissue that needs to be stretched. In addition, the outer surfaces of the first expansion portion 3 and the second expansion portion 4 are covered with a silicone layer, which allows the first expansion portion 3 and the second expansion portion 4 to make flexible contact with the patient's tissue through the silicone layer, avoiding pain caused to the patient by hard contact and hard friction during expansion, thus providing a good patient experience.
[0025] As an optional implementation, the first expansion rod 1 and the second expansion rod 2 are hollow structures, and the cross-sections of the first expansion rod 1 and the second expansion rod 2 are arc-shaped. The outer arc surfaces of the first expansion rod 1 and the second expansion rod 2 are located on the sides of the first expansion rod 1 and the second expansion rod 2 that are far apart from each other. This arrangement not only ensures the grip of the first expansion rod 1 and the second expansion rod 2, but also saves materials, reduces the overall weight of the medical expander, and provides installation space for the sleeve 8, the threaded rod 9 and the spring plate 5.
[0026] As an optional implementation, the medical expander is made of medical-grade stainless steel except for the silicone layer, so that it can be sterilized and reused.
Claims
1. A medical dilator with a locking function, characterized in that, It includes a first expansion rod and a second expansion rod, the middle parts of the first expansion rod and the second expansion rod are hinged to each other, one end of the first expansion rod and the second expansion rod are respectively provided with a first expansion part and a second expansion part, the other end of the first expansion rod and the second expansion rod are opened by a spring plate and the first expansion part and the second expansion part are brought together, and a locking mechanism is provided between the first expansion rod and the second expansion rod to drive the spring plate to bend and to move the first expansion part and the second expansion part away from each other.
2. The medical dilator with locking function according to claim 1, characterized in that, The first expansion portion and the second expansion portion are symmetrical to each other and close to each other to form a conical funnel with an elliptical cross section.
3. The medical dilator with locking function according to claim 1, characterized in that, The first expansion rod and the second expansion rod each have a pair of hinge ears in the middle, and the two pairs of hinge ears are rotatably connected by a connecting shaft.
4. The medical dilator with locking function according to claim 3, characterized in that, The locking mechanism includes a sleeve and a threaded rod. One end of the sleeve is fixed to the connecting shaft. One end of the threaded rod is inserted into the sleeve and threadedly engaged with the sleeve. The other end of the threaded rod passes through the middle of the spring plate and is provided with a cylindrical bolt head for abutting against the spring plate.
5. The medical dilator with locking function according to claim 4, characterized in that, The spring sheet is arc-shaped.
6. The medical dilator with locking function according to claim 4, characterized in that, The outer surface of the cylindrical bolt head is provided with several longitudinal and transverse stripes.
7. The medical dilator with locking function according to claim 3, characterized in that, The two pairs of hinged ears are located near the ends where the first expansion portion and the second expansion portion are located.
8. The medical dilator with locking function according to claim 1, characterized in that, The first expansion rod and the second expansion rod are hollow structures, and the cross-sections of the first expansion rod and the second expansion rod are arc-shaped. The outer arc surfaces of the first expansion rod and the second expansion rod are located on the sides of the first expansion rod and the second expansion rod that are far apart from each other.
9. The medical dilator with locking function according to claim 2, characterized in that, The outer surfaces of the first expansion portion and the second expansion portion are covered with a silicone layer.
10. The medical dilator with locking function according to any one of claims 1-8, characterized in that, The medical expander is made of medical-grade stainless steel.