A nasal cavity expander

Abstract

This invention provides a nasal cavity expander, comprising a main support body and an expander fixedly connected to its rear side. The expander has a gradually decreasing front-to-rear structure with an arc-shaped depression in the middle along the axial direction to conform to the internal shape of the nasal cavity and provide support. An elastic airbag is provided on the outer side of the expander, fitting against the inner wall of the nasal cavity to achieve flexible cushioning support. The inner wall of the front side of the main support body is provided with an arc-shaped support plate and an adjustment chamber. The adjustment chamber is equipped with a top plate, a slider, a lifting rod, and a worm gear transmission structure to achieve fine pushing adjustment of the local position of the main support body and the expander. The force on the top plate is transmitted to the expander through the strip-shaped force transmission component inside the main support body, causing it to bulge locally to adapt to the shape of the nasal cavity. The main support body and the expander can be made of deformable materials or rigid frame composite flexible materials to ensure local displacement or shape adjustment. Through this structure, the expander inside the nasal cavity achieves flexible fit, multi-point support, and local adjustment, enhancing wearing comfort, support stability, and reliability.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a nasal cavity expander. Background Technology

[0002] Nasal retractors are commonly used auxiliary devices in otolaryngology and related surgeries. Their main function is to expand the nasal cavity to provide operating space and support the nasal cavity structure. However, most existing devices are rigid integral structures, which make it difficult to achieve uniform fit under different nasal cavity shapes, and can easily cause local pressure, patient discomfort, or mucosal damage.

[0003] Existing devices typically rely on overall sliding or simple spiral adjustment, failing to provide precise, zoned or localized adjustments for different areas of the nasal cavity. This makes it difficult for the device to provide effective multi-point support when dealing with patients with significant differences in nasal cavity structure, affecting the surgical field of view and support stability.

[0004] Furthermore, existing devices have limited support for the bottom and curved areas of the nasal cavity, and most cannot form a flexible, conforming interface, lacking adaptive support for the nasal cavity wall. This not only reduces wearing comfort but also increases the risk of displacement during use, potentially affecting clinical efficacy and safety.

[0005] Therefore, there is an urgent need for a nasal retractor capable of precise local adjustment of the nasal cavity, with flexible fit and multi-point support. This device should be able to adapt to different nasal anatomical shapes, improving wearing comfort, support stability, and operational safety, thereby meeting the practical needs of nasal retractors during clinical surgery or postoperative recovery. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a nasal cavity expander.

[0007] The objective of this invention is achieved as follows: A nasal cavity expander includes a main support body, an expander body fixedly connected to the rear side of the main support body, the front cross-sectional dimension of the expander body being larger than the rear cross-sectional dimension, the middle of the expander body being concave inward in an arc shape, and an elastic airbag being provided at the arc-shaped concave part of the outer side of the expander body; a strip groove is formed in the lower part of the expander body and the main support body, and an elastic connecting band is provided between the strip groove between the lower part of the expander body and the main support body, the elastic connecting band connecting the left and right sides of the lower part of the expander body and the main support body, the rear end of the expander body being an arc-shaped surface structure; an arc-shaped support plate is provided on the inner side of the front side of the main support body, an elastic connecting plate is provided between the rear side of the arc-shaped support plate and the main support body, a cover plate is provided on the front side between the arc-shaped support plate and the main support body, and an adjustment chamber is formed between the arc-shaped support plate, the main support body, the elastic connecting plate and the cover plate, and an adjustment mechanism is provided in the adjustment chamber.

[0008] Furthermore, an arc-shaped guide rail is provided in the middle of the outer side of the arc-shaped support plate, and multiple adjustment mechanisms are slidably arranged on the arc-shaped guide rail.

[0009] Beneficial effects: The present invention has the following technical effects when used:

[0010] 1. The nasal cavity expander described in this application is designed with the main support body and the expander body as one unit, and an arc-shaped concave structure is set in the middle of the expander body, so that the device can conform to the internal shape of the nasal cavity after being inserted into the nasal cavity, providing a flexible support space; combined with the fit of the elastic airbag to the inner wall of the nasal cavity, it can achieve buffer support without generating obvious local pressure, thereby improving wearing comfort and operation safety.

[0011] 2. By setting strip grooves and elastic connecting strips at the bottom of the main support and expansion body, a multi-point support structure with flexible deformation capability is formed, so that the bottom and side walls of the nasal cavity can be evenly contacted and supported, achieving overall stable fixation and allowing local fine adjustment, thereby enhancing the stability and adaptability of the equipment during use.

[0012] 3. This application employs a zoned adjustment mechanism, including a slider, a top plate, a lifting rod, and a worm gear transmission structure. Through precise pushing of the top plate against specific locations of the main support body, localized protrusion or support displacement of the expander in specific areas can be achieved. Furthermore, by combining a strip-shaped force transmission component and a rotating force transmission structure, the pushing force is efficiently transmitted to the rear end of the expander, improving adjustment accuracy and support efficiency, and meeting the personalized adjustment needs of different nasal cavity shapes.

[0013] 4. The overall design of this application realizes the zoned and controllable adjustment of the nasal cavity, so that the support and expansion effects can be flexibly adjusted according to actual needs, improving the convenience of surgical or examination operations, patient comfort and equipment safety, while reducing the risk of irritation to the nasal mucosa. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the invention.

[0015] Figure 2 This is a schematic diagram of the rear structure of the invention.

[0016] Figure 3 This is a schematic diagram of the inner structure of the cover plate of the invention.

[0017] Figure 4 This is a schematic diagram of the expanded body structure of the invention.

[0018] Figure 5 This is a schematic diagram of the supporting plate and elastic connecting plate structure of the invention.

[0019] Figure 6 This is a schematic diagram of the elastic connecting plate structure of the invention.

[0020] Figure 7 This is a schematic diagram of the adjustment mechanism of the invention.

[0021] Figure 8 This is a schematic diagram of the sliding mechanism of the invention.

[0022] Figure 9 This is a partial structural diagram of the sliding mechanism of the invention.

[0023] Figure 10 This is a schematic diagram of the structure of the second rotating shaft and the second lifting rod of the invention.

[0024] Figure 11 This is a partial structural diagram of the adjustment mechanism of the invention.

[0025] Figure 12 This is a schematic diagram of the lifting rod and rotating shaft of the invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Main support body; 2. Elastic airbag; 3. Elastic connecting belt; 4. Cover plate; 5. Expansion body; 6. Arc-shaped support plate; 7. Arc-shaped groove; 8. Elastic connecting plate; 9. Arc-shaped guide rail; 10. Slider 1; 11. Slider 2; 12. Lifting rod 2; 13. Worm gear 2; 14. Slide groove; 15. Spring; 16. Limiting plate; 17. Rotating rod 2; 18. Grip rod 2; 19. Grip rod 1; 20. Rotating rod 1; 21. Worm gear 1; 22. Worm wheel 1; 23. Lifting rod 1; 24. Rotating shaft 1; 25. Rotating shaft 2; 26. Pressure plate; 27. Worm wheel 2. Detailed Implementation

[0028] Example 1, such as Figure 1-12 As shown, the objective of this invention is achieved as follows: a nasal cavity expander includes a main support body 1, with an expander body 5 fixedly connected to the rear side of the main support body 1. The expander body 5 has a gradually decreasing structure, with the front cross-sectional dimension being larger than the rear cross-sectional dimension, to adapt to the anatomical morphological characteristics of the nasal cavity gradually expanding from the inside to the outside. The middle part of the expander body 5 forms an inwardly concave arc-shaped structure along the axial direction, which is used to provide compliant support space for the inside of the nasal cavity after insertion into the nasal cavity.

[0029] An elastic airbag 2 is provided on the outer surface of the expander 5 in a corresponding arc-shaped recessed area. The elastic airbag 2 is provided on the outer surface of the expander 5 by means of bonding, embedding, covering, or integral molding, and its material can be silicone, medical rubber, elastic polymer material, or composite material with elastic deformation capability. The elastic airbag 2 can generate elastic deformation in a natural state or under pressure to form a flexible fit interface when in contact with the inner wall of the nasal cavity, thereby achieving a buffering and support function without creating obvious local pressure.

[0030] It should be noted that the specific structural form, inflation method, or whether the elastic airbag 2 is a solid elastomer is not the only limitation of this application; it is only used to achieve the technical effects of flexible adaptation, buffering contact, or dispersing force.

[0031] Both the expander 5 and the main support 1 have strip-shaped grooves extending in the front-to-back direction at their lower parts, and the strip-shaped grooves at the lower part of the expander 5 and the main support 1 correspond to each other in spatial position. An elastic connecting band 3 is provided between the two strip-shaped grooves, and the two ends of the elastic connecting band 3 are respectively connected to the left and right sides of the lower part of the expander 5 and the main support 1, thereby forming a connection structure with a certain degree of flexible deformation capability between the expander 5 and the main support 1. Through this structure, the device can form multi-point contact support at the bottom of the nasal cavity when worn, enhancing overall stability, while allowing for local fine-tuning deformation to improve wearing comfort.

[0032] The rear end of the expander 5 is formed into an arc-shaped surface structure to reduce the foreign body sensation when inserted into the nasal cavity and reduce the risk of irritation to the nasal mucosa.

[0033] An arc-shaped support plate 6 is provided on the front inner wall of the main support body 1. The rear side of the arc-shaped support plate 6 is connected to the inner wall of the main support body 1 through an elastic connecting plate 8, so that the arc-shaped support plate 6 has a certain elastic displacement space relative to the main support body 1. A cover plate 4 is provided between the arc-shaped support plate 6 and the front side of the main support body 1. The arc-shaped support plate 6, the main support body 1, the elastic connecting plate 8 and the cover plate 4 enclose an adjustment chamber, which is used to accommodate the adjustment mechanism and protect and limit it. The elastic connecting strip 3, together with the lower part of the expansion body 5 and the strip groove of the lower part of the main support body 1, forms a flexible load-bearing structure, so that the expansion body can produce a small displacement during local adjustment, thereby ensuring both local support and overall stability. The elastic connecting plate 8 has a certain thickness and elastic modulus, which can provide a micro-elastic displacement space when the top plate is adjusted and pushed, thereby avoiding the direct rigid force on the support plate causing nasal discomfort, while ensuring synchronous response between the arc-shaped support plate and the main support body.

[0034] An arc-shaped guide rail 9 is provided on the middle of the outer side of the arc-shaped support plate 6 along its arc-shaped direction. Multiple adjustment mechanisms are slidably provided on the arc-shaped guide rail 9 for zoned and controllable adjustment of different positions of the main support body 1 and the expansion body 5.

[0035] The adjustment mechanism includes two sliders 10 mounted on the arc-shaped guide rail 9, each slider 10 being able to slide along the direction of the arc-shaped guide rail 9; a top plate that can move up and down is provided above the sliders 10, the top plate being used to push against the inside of the main support body 1 during the adjustment process.

[0036] The slider 10 has a lifting rod 23 that can move up and down inside, and the upper end of the lifting rod 23 is connected to the top plate. The slider 10 has a functional slot, and a rotating shaft 24 is rotatably installed in the functional slot. The lower end of the lifting rod 23 is connected to the rotating shaft 24 by a threaded connection, so that the rotating shaft 24 can convert the rotational motion into the axial linear motion of the lifting rod 23 when it rotates.

[0037] A worm gear 22 is rotatably disposed within the functional slot, and the rotating shaft 24 is fixedly connected to the central axis of the worm gear 22; a rotating rod 20 is disposed on one side of the worm gear 22, and a worm 21 is fixedly disposed on the rotating rod 20, forming a meshing transmission structure between the worm 21 and the worm gear 22.

[0038] The front end of the rotating rod 20 passes through the arc-shaped groove 7 provided on the cover plate 4, and a handle 19 is fixedly provided at its front end to facilitate the operator to rotate and adjust it.

[0039] The above structure allows for fine adjustment of the height difference between the left and right sides of the top plate or the overall curvature of the top plate, thereby enabling the main support 1 and the expansion body 5 to form different degrees of lifting or support effects in local positions, so as to better adapt to different nasal cavity shapes.

[0040] A sliding mechanism is provided at the lower center of the top plate. The sliding mechanism includes a slider 11 that can slide along the arc-shaped guide rail 9. A lifting rod 12 is provided inside the slider 11 that can move up and down. The upper end of the lifting rod 12 is connected to the top plate.

[0041] The slider 21 also has a functional slot, within which a rotating shaft 25 is rotatably mounted. The lower end of the lifting rod 22 is threadedly connected to the rotating shaft 25. The rotating shaft 25 is fixedly connected to the central shaft of the worm gear 27, which is driven to rotate by meshing with the worm 23. The worm gear structure efficiently transmits the rotational motion of the lever to the worm wheel, further driving the rotating shaft to rotate. The threaded connection converts the rotational motion into the linear lifting motion of the lifting rod, thus achieving precise, efficient, and controllable adjustment of the top plate. Simultaneously, this worm gear meshing transmission provides a self-locking function, preventing the top plate from sliding due to gravity or reverse force after release, ensuring stability after adjustment.

[0042] The worm gear 2 13 is mounted on the rotating rod 2 17. The front end of the rotating rod 2 17 passes through the arc-shaped groove 7 on the cover plate 4 and is provided with a handle 2 18 for pushing or rotating operation.

[0043] The rear end of the rotating rod 17 is rotatably provided with a pressure plate 26, and the rear part of the slider 11 is provided with a pressure plate 26 groove for accommodating the pressure plate 26. The pressure plate 26 can move in the front-back direction within the pressure plate 26 groove. The front side of the pressure plate 26 forms a friction contact structure with the rear side of the arc-shaped guide rail 9.

[0044] The outer side of the rotating rod 17 is provided with a plurality of sliding grooves 14, and the inner end face of the worm gear 13 is provided with a moving block corresponding to the number of sliding grooves 14. The moving block can move back and forth in the sliding grooves 14, thereby causing the worm gear 13 to form an axial displacement relative to the rotating rod 17.

[0045] The slider 2 11 has a spring 15 groove, and the rotating rod 2 17 is fitted with a spring 15 on the outside. The spring 15 is located in the spring 15 groove, and a limit plate 16 is provided on the rotating rod 2 17. The two ends of the spring 15 abut against the limit plate 16 and the end wall of the spring 15 groove, respectively, so as to realize the automatic reset of the axial position of the rotating rod 2 17.

[0046] With the above structure, the frictional locking relationship between the pressure plate 26 and the guide rail can be released when the grip lever 2 18 is pushed, thereby realizing the rapid position adjustment of the slider 2 11 and the top plate; after being released, the pressure plate 26 presses the guide rail again under the action of the spring 15, forming a position limiting effect and improving the stability after adjustment.

[0047] In use, the rear side of this device is inserted into the nasal cavity, so that the outer surface of the expander 5 fits against the inner wall of the nasal cavity, while the elastic airbag 2 forms a flexible contact with the inner wall of the nasal cavity, thus providing support for the nasal cavity. At this time, the lower end of the expander 5 and the elastic connecting band 3 contact and fit against the bottom of the nasal cavity, thereby providing stable support and fixation for the entire device.

[0048] When fine adjustments are needed to the local positions of the main support 1 and the expansion body 5, this can be achieved by adjusting the position of the top plate on the adjustment mechanism below the main support 1. Specifically, use a handheld device or auxiliary tool to push the second lever 18 backward, compressing the spring 15. This causes the pressure plate 26 to move backward, disengaging from the rear side of the arc-shaped guide rail 9, thus releasing the friction restriction between the pressure plate 26 and the guide rail, allowing the top plate to move horizontally along the guide rail. By moving the second lever 18 along the arc-shaped groove 7 of the cover plate 4, the second worm gear 13 can be positioned below the main support 1 to be adjusted, ensuring the top plate is accurately positioned at the target adjustment location. After releasing the second lever 18, under the elastic force of the spring 15, the pressure plate 26 re-engages with the arc-shaped guide rail 9, achieving friction locking and thus stabilizing and limiting the position of the top plate, preventing left and right movement.

[0049] Subsequently, by rotating the grip lever 18, the worm gear 13 drives the worm wheel 27 and the rotating shaft 25 to rotate. Due to the threaded connection between the rotating shaft 25 and the lifting rod 12, the lifting rod 12 moves up and down axially, causing the top plate to move upward at the corresponding position. The upward force of the top plate is transmitted to the main support 1 through the contact surface between the top plate and the main support 1, resulting in a local upward protrusion of the main support 1. Since the main support 1 and the expander 5 are an integral structure, this local lifting also causes the corresponding position of the expander 5 to protrude outward, thereby achieving local expansion of the expander 5 inside the nasal cavity, allowing it to better contact or slightly compress the inner wall of the nasal cavity, enhancing the fit and support effect.

[0050] In addition, the height difference and lifting distance on the left and right sides of the top plate can be adjusted according to specific needs. By rotating the grip rod 19, the worm gear 21, worm wheel 22 and rotating shaft 24 are driven to rotate, so that the lifting rod 23 moves axially, thereby adjusting the height or curvature of the left and right ends of the top plate. This achieves precise control over the lifting curvature of the main support body 1 and the expansion body 5 at local positions, further optimizing the fit and comfort of the expansion body 5 with the nasal cavity wall.

[0051] Furthermore, in an optional embodiment, the main support 1 and the expansion body 5 are made of structural materials with a certain deformability, or are composed of a rigid frame and a flexible material, so that they can produce local displacement or shape adjustment within a limited range under the action of external force.

[0052] The main support body 1 and the expansion body 5 are provided with multiple strip-shaped force transmission components or strip-shaped pressure plates and pressure rods along their axial direction. The strip-shaped force transmission components are distributed along the length direction of the main support body 1 and the expansion body 5. Their front ends correspond to the area inside the main support body 1 that can be acted upon by the top plate, and their rear ends extend to or correspond to the corresponding position of the expansion body 5.

[0053] When the adjusting mechanism drives the top plate to move upward and exerts a pushing force on a certain position inside the main support 1, the strip-shaped force transmission component corresponding to that position will generate a displacement or attitude change in the longitudinal direction inside the main support 1. This displacement or change is transmitted to the interior of the expansion body 5 through the strip-shaped force transmission component, causing the expansion body 5 to form an outward protrusion or support displacement in the area corresponding to the strip-shaped force transmission component.

[0054] By setting up the above-mentioned strip-shaped force transmission components, the local jacking action inside the main support 1 can be transmitted to the corresponding position of the expansion body 5 in a structured and controllable manner, avoiding large elastic deformation of the main support 1 or the expansion body 5 as a whole, thereby improving the adjustment accuracy, structural stability and reliability of use.

[0055] Based on the above-mentioned strip-shaped force transmission component, in an exemplary embodiment, the front end of the main support 1 is configured as a fixed rigid structure, which is used to provide stable support and rotation reference for the internal force transmission component.

[0056] The front end of the strip-shaped force transmission component is connected to the fixed rigid structure at the front end of the main support body 1 through a rotating shaft, hinge, or other rotatable connection method, so that the strip-shaped force transmission component can rotate in a restricted manner relative to the front end of the main support body 1; the rear end of the strip-shaped force transmission component extends into the interior of the expansion body 5 or forms a force transmission cooperation relationship with the corresponding area of ​​the expansion body 5.

[0057] When the adjusting mechanism drives the top plate to move upward and exerts a pushing effect on the middle or front of the strip force transmission component, the strip force transmission component rotates with the front fixed rigid structure as the rotation fulcrum. During the rotation, its rear end is displaced outward or upward, thereby causing the expansion body 5 to produce an outward protrusion or support unfolding effect at the corresponding position.

[0058] By setting up the above-mentioned rotating force transmission structure, the jacking force applied by the top plate is transmitted to the rear end of the expansion body 5 after being amplified or reversed by the rotation of the strip force transmission component. Compared with the linear jacking method, a more obvious expansion effect of the expansion body 5 can be achieved with a smaller adjustment stroke, thereby improving the adjustment sensitivity and support efficiency.

[0059] It should be noted that the fixed rigid structure, the rotational connection method of the strip force transmission component, and its specific structural form are not the only limitations of this application. They are only used to illustrate a feasible structural method for effectively transmitting the internal jacking force of the main support 1 to the rear end of the expansion body 5.

[0060] In the description of this invention, it should be noted that the main support, expansion body, adjustment mechanism, and their connection relationships, force transmission methods, and driving forms described in this application are merely one of the preferred embodiments for achieving the technical effects of this application, and are not intended to limit the scope of protection of this application. Without departing from the overall technical concept of this application, those skilled in the art can make various equivalent substitutions or modifications to the above structure.

[0061] For example, the main support and expansion body can be made entirely of materials with elasticity or deformability, or they can be formed by combining a rigid frame with flexible materials. The strip-shaped force transmission components, pressure plates, or pressure rod structures inside can be continuous, segmented, or irregularly distributed, and their number, shape, cross-sectional form, and arrangement can be adjusted as needed. The strip-shaped force transmission components can transmit the jacking force through linear displacement, or they can achieve force transmission and direction conversion through rotation, swinging, bending, or multi-degree-of-freedom composite motion.

[0062] Furthermore, the jacking force of the top plate on the main support body can be achieved through direct contact or indirectly through intermediate force transmission components, flexible pads, elastic layers or other buffer structures; the transmission of jacking force between the main support body and the expansion body can rely on the synchronous deformation of the integrated structure or be achieved through internal force transmission components, hinged structures, elastic connection structures or other mechanical transmission forms.

[0063] Furthermore, the worm gear, threaded lifting, spring reset, and friction limiting structure used in the adjustment mechanism are merely illustrative examples. The driving method can be replaced by gear transmission, cam mechanism, wedge structure, eccentric structure, electric drive, pneumatic drive, or other structural forms that can achieve displacement adjustment and position locking. The corresponding control method can be manual control, semi-automatic control, or automatic control. The setting position, number, and connection method of the control elements do not constitute a limitation on this application.

[0064] Therefore, any equivalent substitutions, combinations, or modifications made to the above-mentioned structure, materials, connection methods, or force transmission paths under the guidance of the technical concept of this application should fall within the protection scope of this application. The above descriptions are merely preferred embodiments of the present invention and are not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A nasal cavity expander, comprising a main support body, characterized in that: An expander is fixedly connected to the rear side of the main support body. The front cross-sectional dimension of the expander is larger than that of the rear cross-section. The middle of the expander is concave inward, and an elastic airbag is provided at the concave part of the outer side of the expander. A strip groove is opened at the lower part of the expander and the main support body. An elastic connecting band is provided between the strip grooves between the expander and the lower part of the main support body. The elastic connecting band connects the left and right sides of the lower part of the expander and the main support body. The rear end of the expander is a curved surface structure. An arc-shaped support plate is provided on the inner side of the front side of the main support body. An elastic connecting plate is provided between the rear side of the arc-shaped support plate and the main support body. A cover plate is provided on the front side between the arc-shaped support plate and the main support body. An adjustment chamber is formed between the arc-shaped support plate, the main support body, the elastic connecting plate and the cover plate. An adjustment mechanism is provided in the adjustment chamber. An arc-shaped guide rail is provided in the middle of the outer side of the arc-shaped support plate, and multiple adjustment mechanisms are slidably arranged on the arc-shaped guide rail; the adjustment mechanism includes two sliders, each slider being slidably located on the arc-shaped guide rail; a top plate that can move up and down is provided above the sliders. A sliding mechanism is provided at the lower center of the top plate. The sliding mechanism includes a second slider, which is slidably located on an arc-shaped guide rail. A second lifting rod is provided inside the second slider, which can move up and down. The second lifting rod drives the top plate to move up and down. A functional slot is provided inside the second slider, and a second rotating shaft is rotatably provided inside the functional slot. The lower end of the second lifting rod is threadedly connected to the second rotating shaft. When the second rotating shaft rotates, it drives the second lifting rod to move up and down through the threaded connection structure. A second worm gear is rotatably installed inside the functional slot, and a second rotating shaft is fixedly connected to the central shaft of the second worm gear. A second rotating rod is rotatably installed on the side of the second worm gear, and a second worm is installed on the second rotating rod. The second rotating rod drives the second worm to rotate, and the second worm and the second worm gear mesh with each other for transmission. The second worm drives the second worm gear to rotate, and the front end of the second rotating rod passes through the arc-shaped groove on the cover plate. A second grip is fixedly installed at the front end of the second rotating rod. The rear end of the rotating rod 2 is rotatably equipped with a pressure plate, and the rear part of the slider 2 is provided with a pressure plate groove, in which the pressure plate can move back and forth.

2. The nasal cavity expander according to claim 1, characterized in that: The slider is equipped with a lifting rod that can move up and down, and the lifting rod drives the top plate to move up and down.

3. The nasal cavity expander according to claim 2, characterized in that: The slider has a functional slot, and a rotating shaft is rotatably installed in the functional slot. The lower end of the lifting rod is threadedly connected to the rotating shaft. When the rotating shaft rotates, it drives the lifting rod to move up and down through the threaded connection structure.

4. The nasal cavity expander according to claim 3, characterized in that: A worm gear is rotatably mounted inside the functional slot, and a rotating shaft is fixedly connected to the central shaft of the worm gear. A rotating rod is rotatably mounted on the side of the worm gear, and a worm is mounted on the rotating rod. The rotating rod drives the worm to rotate, and the worm and the worm gear mesh with each other for transmission. The worm drives the worm wheel to rotate.

5. The nasal cavity expander according to claim 4, characterized in that: An arc-shaped groove is provided on the cover plate, and the front end of the rotating rod passes through the arc-shaped groove on the cover plate. A handle is fixedly provided at the front end of the rotating rod.

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