Oral cavity dilator

Abstract

The utility model relates to the technical field of ophthalmology and otorhinolaryngology nursing, in particular to an oral cavity dilator which comprises a supporting frame, a force applying part and a dilating part, and the force applying part comprises an upper sliding rod, a lower sliding rod, an operating body and a matching body; one-way self-locking assemblies which are matched with each other are arranged on the operation body and the matching body; the force transmission end of the operation body is hinged to the upper sliding rod. The force transmission end of the matching body is hinged to the lower sliding rod. An upper guide rod is slidably arranged on the upper sliding rod; the lower sliding rod is slidably provided with a lower guide rod. The expansion part comprises an upper tension rod and a lower tension rod; one end of the upper tensioning rod is slidably connected to the upper sliding rod, and the other end is provided with an upper expanding piece; one end of the lower tension rod is slidably connected to the lower slide rod, and the other end is provided with a lower expansion piece; the middle of the upper tensioning rod and the middle of the lower tensioning rod are hinged to the supporting frame. The upper expanding piece and the lower expanding piece are both located in the supporting frame. By the adoption of the technical scheme, after pressing expansion reaches the needed position, it can be guaranteed that the expansion size is not changed even if pressing is stopped, and the effects of being high in adjusting efficiency and convenient to operate are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of otolaryngology nursing, and in particular to an oral expander. Background Art

[0002] When medical staff examine the patient's oral cavity, they need to use medical instruments to open the oral cavity.

[0003] The existing patent document with publication number CN 218106080 U provides an expansion support device for the stomatology department. The device is provided with a plurality of limit holes on the support frame to limit the movement of the limit rod, so that the plurality of limit rods can expand the patient's lips in different directions by driving the plurality of expansion plates, so that it can meet more working environments and working requirements; the adjusting rod is driven by the threaded rod, so that the device can use the self-locking characteristics of the threaded connection to arbitrarily adjust the spacing between the adjusting rods, so that the spacing between the expansion plates can be adjusted, which can not only facilitate the user to put the expansion plate into the patient's mouth, but also adjust the expansion size according to the size of the patient's mouth. Although the device has many beneficial effects, the following problems still exist: when using the device, one hand needs to hold the handle and the other hand needs to adjust the rotating handle to drive the adjusting rod, which is slow, the adjustment efficiency is not high, the operation is inconvenient, and it is not convenient for medical work.

[0004] In view of this, the applicant conducted an in-depth study on the above-mentioned issues, which led to the present case. Utility Model Content

[0005] The utility model aims to provide an oral dilator with high adjustment efficiency and convenient operation.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An oral dilator comprises a support frame, a force-applying part and an expansion part, wherein the force-applying part comprises an upper slide bar, a lower slide bar, an operating body and a matching body rotatably connected to the middle part of the operating body; the operating body and the matching body are provided with mutually cooperating one-way self-locking components; the operating body and the matching body both have a gripping end and a force-transmitting end; the force-transmitting end of the operating body is hinged to the upper slide bar; the force-transmitting end of the matching body is hinged to the lower slide bar; the upper slide bar and the lower slide bar are arranged side by side; the support frame is located between the upper slide bar and the lower slide bar; the upper slide bar is slidably provided with an upper guide fixed to the support frame Rod, the upper guide rod is perpendicular to the upper sliding rod; the lower sliding rod is slidably provided with a lower guide rod fixed to the support frame, and the lower guide rod is perpendicular to the lower sliding rod; the expansion part includes one or two upper tension rods and lower tension rods arranged one by one corresponding to each of the upper tension rods; one end of the upper tension rod is slidably connected to the upper sliding rod, and the other end is provided with an upper expansion piece; one end of the lower tension rod is slidably connected to the lower sliding rod, and the other end is provided with a lower expansion piece; the middle part of the upper tension rod and the middle part of the lower tension rod are both hinged to the support frame; the support frame encloses an area, and the upper expansion piece and the lower expansion piece are both located in the area.

[0008] Preferably, the gripping end of the operating body is provided with a first gripping ring; the gripping end of the matching body is provided with a second gripping ring.

[0009] Preferably, the inner wall of the first gripping ring and / or the inner wall of the second gripping ring are provided with anti-slip patterns.

[0010] Preferably, the upper expansion member is hinged to the upper tension rod; and the lower expansion member is hinged to the lower tension rod.

[0011] Preferably, a connecting column is provided in the middle of the operating body, and the matching body is indirectly rotatably connected to the operating body through the connecting column.

[0012] Preferably, the one-way self-locking component includes an arc-shaped clip and a self-locking part, the self-locking part is provided with a groove for the arc-shaped clip to pass through, and the self-locking part is also provided with a limiter for limiting the movement of the arc-shaped clip, and the arc-shaped clip is inserted in the groove; the arc-shaped clip is connected to the operating body and the self-locking part is connected to the matching body, or the arc-shaped clip is connected to the matching body and the self-locking part is connected to the operating body.

[0013] Preferably, the support frame is provided with upper rotating columns and lower rotating columns arranged one-to-one corresponding to each of the upper rotating columns;

[0014] The number of the upper rotating column is one, the number of the upper tension rod is one, the middle part of the upper tension rod is connected to the upper rotating column by rotation and is hinged to the support frame, and the middle part of the lower tension rod arranged corresponding to the upper tension rod is connected to the lower rotating column by rotation and is hinged to the support frame; or,

[0015] The number of the upper rotating column is one, the number of the upper tensioning rods is two, the middle parts of the two upper tensioning rods are connected to the upper rotating column by rotation and are hinged to the support frame, and the middle parts of the lower tensioning rods arranged corresponding to the upper tensioning rods are connected to the lower rotating column by rotation and are hinged to the support frame; or,

[0016] There are two upper rotating columns and two upper tension rods. The middle parts of the two upper tension rods are hinged to the support frame by being rotationally connected to the two upper rotating columns in a one-to-one manner. The middle parts of the lower tension rods corresponding to the upper tension rods are hinged to the support frame by being rotationally connected to the lower rotating columns. The lower rotating column to which any lower tension rod is rotationally connected corresponds to the upper rotating column to which the upper tension rod corresponding to the lower tension rod is rotationally connected.

[0017] Preferably, the upper sliding rod is provided with an upper sliding groove arranged along the length direction of the upper sliding rod; the lower sliding rod is provided with a lower sliding groove arranged along the length direction of the lower sliding rod; the end of the upper tension rod away from the upper expansion piece is hinged with an upper sliding piece, and the end of the lower tension rod away from the lower expansion piece is hinged with a lower sliding piece; the upper tension rod is slidably connected to the upper sliding groove through the upper sliding piece, and the lower tension rod is slidably connected to the lower sliding groove through the lower sliding piece.

[0018] Preferably, the end of the upper tension rod away from the upper expander is hinged with an upper sliding ring, and the end of the lower tension rod away from the lower expander is hinged with a lower sliding ring; the upper sliding ring is sleeved on the upper sliding rod, and the upper tension rod is slidably connected to the upper sliding rod through the upper sliding ring; the lower sliding ring is sleeved on the lower slide rod, and the lower tension rod is slidably connected to the lower slide rod through the lower sliding ring.

[0019] Preferably, a first protrusion is provided on one end of the upper tension rod away from the upper expansion piece, and a second protrusion is provided on one end of the lower tension rod away from the lower expansion piece.

[0020] By adopting the above technical solution, the beneficial effects of the utility model are:

[0021] 1. By setting a support frame, a force-applying part and an expansion part, the relative pressing force between the gripping end of the operating body and the gripping end of the matching body is converted into a relative expansion force between the upper expansion piece and the lower expansion piece. At the same time, a one-way self-locking component is provided between the operating body and the matching body. During use, the effect of high adjustment efficiency and convenient operation is achieved. After the expansion reaches the desired position by pressing, the expansion size can be guaranteed to remain unchanged even if the pressing and force application is stopped.

[0022] 2. By providing a first gripping ring and a second gripping ring, it is convenient for medical staff to hold and use the device; by providing anti-slip patterns on the inner wall of the first gripping ring and / or the inner wall of the second gripping ring, it is effectively prevented that the fingers of medical staff slip out of the first gripping ring and / or the second gripping ring during use.

[0023] 3. By hingedly connecting the upper expander to the upper rod and the lower expander to the lower rod, it is ensured that during the oral expansion process, the upper expander and the lower expander can automatically adjust to fit the oral cavity as the mouth shape changes, avoiding excessive local force due to a small force area, and avoiding damage to oral tissue.

[0024] 4. A first protrusion is provided at one end of the upper tension rod away from the upper expansion piece to prevent the upper tension rod from being perpendicular to the upper sliding rod; if the upper tension rod is perpendicular to the upper sliding rod, rotating the operating body and the matching body will cause the upper tension rod and the upper sliding rod to be stuck and unable to slide flexibly, resulting in the operating body and the matching body being unable to rotate, and providing the first protrusion can avoid this situation; similarly, a second protrusion is provided at one end of the lower tension rod away from the lower expansion piece to prevent the lower tension rod from being perpendicular to the lower sliding rod, which can prevent the lower tension rod and the lower sliding rod from being stuck and unable to slide flexibly; by providing the first protrusion and the second protrusion, the relative sliding between the upper tension rod and the upper sliding rod and the relative sliding between the lower tension rod and the lower sliding rod are more flexible, thereby ensuring the flexible use of the oral dilator. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of an oral dilator according to Embodiment 1 of the present utility model;

[0026] Figure 2 For this utility model Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 3 It is a schematic cross-sectional structure diagram of the connection position between the one-way self-locking component and the matching body in the first embodiment of the utility model;

[0028] Figure 4 It is a schematic diagram of the cross-sectional structure at the connection position of the upper sliding rod and the upper tension rod in the first embodiment of the utility model;

[0029] Figure 5It is a schematic cross-sectional structure diagram of the connection position between the lower sliding rod and the lower tension rod in the first embodiment of the utility model;

[0030] Figure 6 This is a schematic structural diagram of the oral dilator according to the second embodiment of the present utility model.

[0031] In the figure:

[0032] 100-support frame; 110-upper rotating column;

[0033] 120-lower rotating column; 200-force applying part;

[0034] 210-upper slide bar; 211-upper guide bar;

[0035] 212-upper sliding groove; 220-lower sliding rod;

[0036] 221-lower guide rod; 222-lower sliding groove;

[0037] 230-operating body; 231-first grip ring;

[0038] 232-connecting column; 240-matching body;

[0039] 241-second grip ring; 250-one-way self-locking component;

[0040] 251-arc-shaped clamping strip; 252-self-locking piece;

[0041] 253-through slot; 254-limiting member;

[0042] 255-limit bolt rod; 256-limit nut;

[0043] 257-limit spring; 258-limit sliding groove;

[0044] 259-inner convex ring; 260-anti-slip pattern;

[0045] 300- expansion part; 310- upper tension rod;

[0046] 311-upper expansion member; 312-upper sliding member;

[0047] 313-upper sliding ring; 314-first protrusion;

[0048] 320-lower tension rod; 321-lower expansion piece;

[0049] 322-lower sliding member; 323-lower sliding ring;

[0050] 324-Second protrusion. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0052] Embodiment 1

[0053] like Figures 1 to 5 As shown, this embodiment provides an oral dilator, including a support frame 100 , a force applying portion 200 and an expansion portion 300 .

[0054] It should be noted that the support frame 100 can be a frame structure with a regular shape, such as a triangular frame, an isosceles trapezoidal frame, a quadrilateral frame, an elliptical frame, a U-shaped frame, or a dog-bone frame, etc., or it can be a frame structure with an irregular shape.

[0055] For the convenience of explanation, this embodiment is described by taking the support frame 100 as a square frame as an example. The support frame 100 has an upper frame, a lower frame, a left frame and a right frame. The upper frame and the lower frame are parallel and arranged opposite to each other, the left frame and the right frame are parallel and arranged opposite to each other, and the upper frame, the lower frame, the left frame and the right frame enclose an area.

[0056] The force-applying part 200 includes an upper sliding rod 210, a lower sliding rod 220, an operating body 230 and a matching body 240; a connecting column 232 is provided in the middle of the operating body 230, and the matching body 240 is indirectly rotatably connected to the operating body 230 through the connecting column 232. The operating body 230 and the matching body 240 both have a holding end and a force transmission end. Specifically, the operating body 230 is a rod-shaped structure, one end of the operating body 230 is the holding end, and the other end is the force transmission end; the matching body 240 is a rod-shaped structure, one end of the matching body 240 is the holding end, and the other end is the force transmission end. The force transmission end of the operating body 230 is hinged to the middle part of the upper slide bar 210; the force transmission end of the matching body 240 is hinged to the middle part of the lower slide bar 220; the upper slide bar 210 and the lower slide bar 220 are arranged side by side; the support frame 100 is located between the upper slide bar 210 and the lower slide bar 220; the upper slide bar 210 is slidably provided with an upper guide rod 211, and the lower slide bar 220 is slidably provided with a lower guide rod 221, the upper guide rod 211 is perpendicular to the upper slide bar 210, and the upper guide rod 221 is perpendicular to the lower slide bar 220; the upper guide rod 211 is fixed to the upper frame of the support frame 100, and the lower guide rod 221 is fixed to the lower frame of the support frame 100.

[0057] The expansion part 300 includes one or two upper tension rods 310 and lower tension rods 320 arranged one-to-one corresponding to each upper tension rod 310. As a preferred embodiment of the present invention, the expansion part 300 includes two upper tension rods 310 and two lower tension rods. One end of the upper tension rod 310 is slidably connected to the upper slide bar 210, and the other end is provided with an upper expansion piece 311. Specifically, the upper slide bar 210 is provided with an upper sliding groove 212 arranged along the length direction of the upper slide bar 210, the notch width of the upper sliding groove 212 is smaller than the notch bottom width, and the cross-section of the upper sliding groove 212 is an isosceles trapezoidal shape. The upper end of the upper tension rod 310 away from the upper expansion piece 311 is hinged with an upper sliding piece 312, and the upper sliding piece 312 is a quadrangular prism matching the upper sliding groove 212, and the cross-section of the quadrangular prism is an isosceles trapezoidal shape. The notch of the upper sliding groove 212 faces the upper frame of the support frame 100, and the upper sliding piece 312 is slidably connected to the upper sliding groove 212, and the upper tension rod 310 is slidably connected to the upper slide bar 210 through the upper sliding piece 312.

[0058] The cam 322 is provided with a lower sliding groove 212, and the lower sliding groove 212 is provided with a lower sliding groove 212. The lower sliding groove 212 has a groove width less than the groove bottom width. The cross section of the lower sliding groove 212 is an isosceles trapezoid. The groove of the lower sliding groove 212 faces the lower frame of the support frame 100. The lower sliding member 322 is hingedly connected to the end of the lower tension rod 320 away from the lower expansion member 321. The lower sliding member 322 is a quadrangular prism matching the lower sliding groove 212. The cross section of the quadrangular prism is an isosceles trapezoid. The lower sliding member 322 is slidably connected to the upper sliding groove 212. The lower tension rod 320 is slidably connected to the lower rod 220 through the lower sliding member 322.

[0059] The upper expansion piece 311 and the lower expansion piece 321 are both located within the region of the support frame 100 , and both the upper expansion piece 311 and the lower expansion piece 321 have extension sections that can be extended into the oral cavity when in use.

[0060] As a preferred embodiment of the utility model, the upper expander 311 is hinged to the upper tension rod 310, and the lower expander 321 is hinged to the lower tension rod 320. This technical solution ensures that during the oral expansion process, the upper expander 311 and the lower expander 321 can automatically adjust to fit the oral cavity as the mouth shape changes, avoiding excessive local force due to a small force area, and avoiding damage to oral tissue.

[0061] As a preferred embodiment of the utility model, a first protrusion 314 is further provided at one end of the upper tension rod 310 away from the upper expansion piece 311, and a second protrusion 324 is further provided at one end of the lower tension rod 320 away from the lower expansion piece 321; the first protrusion 314 is provided to prevent the upper tension rod 310 from being perpendicular to the upper sliding rod 210 when the operating body 230 and the matching body 240 rotate, and the second protrusion 324 is provided to prevent the lower tension rod 320 from being perpendicular to the lower sliding rod 220 when the operating body 230 and the matching body 240 rotate. The first protrusion 314 is provided at one end of the upper tension rod 310 away from the upper expansion piece 311 to prevent the upper tension rod 310 from being perpendicular to the upper slide rod 210; if the upper tension rod 310 is perpendicular to the upper slide rod 210, then rotating the operating body 230 and the matching body 240 will cause the upper tension rod 310 and the upper slide rod 210 to be stuck and unable to slide flexibly, thereby causing the operating body 230 and the matching body 240 to be unable to rotate, and the first protrusion 314 can avoid this situation; similarly, the second protrusion 324 is provided at one end of the lower tension rod 320 away from the lower expansion piece 321 to prevent the lower tension rod 320 from being perpendicular to the lower slide rod 220, and the lower tension rod 320 and the lower slide rod 220 can be avoided from being stuck; by providing the first protrusion 314 and the second protrusion 324, the relative sliding between the upper tension rod 310 and the upper slide rod 210 and the relative sliding between the lower tension rod 320 and the lower slide rod 220 are more flexible, thereby ensuring the flexible use of the oral dilator.

[0062] The middle part of the upper tension rod 310 and the middle part of the lower tension rod 320 are both hinged to the support frame 100. Specifically, one or two upper rotating columns 110 are fixed to the upper frame of the support frame 100. In this embodiment, an upper rotating column 110 is fixed to the upper frame of the support frame 100; a lower rotating column 120 arranged corresponding to the upper rotating column 110 is fixed to the lower frame of the support frame 100; the middle part of the upper tension rod 310 is rotatably connected to the upper rotating column 110, and the middle part of the lower tension rod 320 is rotatably connected to the lower rotating column 120; an upper fixing cap for preventing the upper tension rod 310 from slipping is provided on the upper rotating column 110, and a lower fixing cap for preventing the lower tension rod 320 from slipping is provided on the lower rotating column 120.

[0063] It should be noted that when the upper frame of the support frame 100 is provided with an upper rotating column 110 and the number of the upper tension rod 310 is one, the following technical solution can also be adopted: the middle part of the upper tension rod 310 is hinged to the support frame 100 by being connected to the upper rotating column 110 through rotation, and the lower frame of the support frame 100 is provided with a lower rotating column 120 arranged corresponding to the upper rotating column 110, and the number of the lower tension rod 320 arranged corresponding to the upper tension rod 310 is also one, and the middle part of the lower tension rod 320 is hinged to the support frame 100 by being connected to the lower rotating column 120 through rotation. When the upper frame of the support frame 100 is provided with two upper rotating columns 110 and the number of the upper tension rods 310 is two, the following technical scheme can also be adopted: the middle parts of the two upper tension rods 310 are connected to the two upper rotating columns 110 by a one-to-one corresponding rotation and are hinged to the support frame 100, and two lower rotating columns 120 are provided on the lower frame of the support frame 100. The lower rotating columns 120 are arranged in a one-to-one correspondence with the upper rotating columns 110, and the number of the lower tension rods 320 is also two. The lower tension rods 320 are arranged in a one-to-one correspondence with the upper tension rods 310. The middle part of the lower tension rods 320 arranged corresponding to the upper tension rods 310 is hinged to the support frame 100 by being connected to the lower rotating column 120 through rotation, and any lower rotating column 120 to which the lower tension rod 320 is rotatably connected corresponds to the upper rotating column 110 to which the upper tension rod 310 arranged corresponding to the lower tension rod 320 is rotatably connected.

[0064] As a preferred embodiment of the present invention, the gripping end of the operating body 230 is provided with a first gripping ring 231, and the gripping end of the matching body 240 is provided with a second gripping ring 241; by providing the first gripping ring 231 and the second gripping ring 241, it is convenient for medical staff to hold and use.

[0065] As a preferred embodiment of the present invention, the inner wall of the first gripping ring 231 and / or the inner wall of the second gripping ring 241 are provided with anti-slip grooves 260 to prevent the fingers of medical staff from slipping out of the first gripping ring 231 and / or the second gripping ring 241 during use.

[0066] The operating body 230 and the matching body 240 are provided with a one-way self-locking component 250 that cooperates with each other; the one-way self-locking component 250 is used to ensure that it can only be expanded by pressing during use to avoid expansion and retraction, and the expansion size can be fixed even without applying pressure; the one-way self-locking component 250 is a conventional structure, and the utility model adopts an unconventional structure. Specifically, the one-way self-locking component 250 includes an arc-shaped clamping strip 251 and a self-locking member 252. The arc-shaped clamping strip 251 is fixed to the operating body 230, and the center of the circle corresponding to the arc edge of the arc-shaped clamping strip 251 is located on the connecting column 232, and the clamping groove of the arc-shaped clamping strip 251 is composed of an inclined surface and a right-angled surface; in order to facilitate the explanation of the specific structure of the clamping groove of the arc-shaped clamping strip 251, the clamping groove of the arc-shaped clamping strip 251 located between the operating body 230 and the matching body 240 is taken as an example for explanation, the right-angled surface of the clamping groove is close to the matching body 240, and the inclined surface of the clamping groove is close to the operating body 230. The self-locking member 252 is fixed to the matching body 240, and the self-locking member 252 is provided with a slot 253 for the arc-shaped clamping strip 251 to pass through, and the arc-shaped clamping strip 251 is inserted in the slot 253; when the operating body 230 and the matching body 240 rotate relative to each other, the arc-shaped clamping strip 251 moves along the slot 253; a limiting member 254 is provided in the slot 253 to limit the movement of the arc-shaped clamping strip 251, and the limiting member 254 includes a limiting bolt rod 255, a limiting nut 256 and a limiting spring 257; one end of the limiting bolt rod 255 is a head, and the other end is a limiting part, and the limiting part is sloped; a limiting part is provided on the inner wall of the slot 253 for limiting The limiting sliding groove 258 in which the component 254 slides, the notch of the limiting sliding groove 258 on the side away from the arc-shaped clamping strip 251 is also provided with an inner convex ring 259, the limiting bolt rod 255 is inserted into the inner convex ring 259, and the limiting nut 256 is threadedly connected to the limiting bolt rod 255; one end of the limiting spring 257 abuts against the side of the inner convex ring 259 facing the arc-shaped clamping strip 251, and the other end abuts against the limiting nut 256; the bolt rod of the limiting bolt rod 255 is slidably connected to the inner convex ring 259, and the limiting nut 256 is slidably connected to the limiting sliding groove 258; the slope surface of the limiting part of the limiting bolt rod 255 faces the slope surface of the clamping groove.

[0067] When pressing and expanding, the operating body 230 and the matching body 240 rotate relative to each other. When the arc-shaped clamping strip 251 moves in the groove 253, it will drive the slope surface of the limiting part of the limiting bolt rod 255 to slide on the slope surface of the clamping slot, and drive the limiting bolt rod 255 to slide in the direction away from the clamping slot until the limiting part completely slides out of the clamping slot, thereby avoiding the limiting bolt rod 255 from interfering with the movement of the arc-shaped clamping strip 251 when pressing and expanding; when pressing to the desired position, stop pressing, the limiting part of the limiting bolt rod 255 contacts the right-angled surface of the clamping slot, which can limit the relative rotation of the operating body 230 and the matching body 240 in the opposite direction of pressing and expanding; after use, only the head of the limiting bolt rod 255 needs to be pulled away from the arc-shaped clamping strip 251 to release the self-locking limit.

[0068] It should be noted that the one-way self-locking component 250 can also adopt other existing conventional structures, for example: the self-locking structure 3 disclosed in the Chinese patent document with publication number CN219289731U; for another example, the locking structure 6 disclosed in the Chinese patent document with publication number CN219516403U.

[0069] When using it, the steps are as follows:

[0070] The first step is expansion and reset. The head of the limit bolt rod 255 is pulled away from the arc-shaped clamping strip 251 to release the self-locking limit, and then the first grip ring 231 and the second grip ring 241 are expanded to positions away from each other until the upper slide bar 210 and the lower slide bar 220 can no longer slide to a position separated from each other.

[0071] In the second step, the extension section of the upper extension piece 311 and the extension section of the lower extension piece 321 are placed inside the patient's lips.

[0072] The third step is to press the first holding ring 231 and the second holding ring 241 towards each other to drive the upper expansion piece 311 and the lower expansion piece 321 to expand in all directions, thereby driving the patient's lips to expand in all directions to achieve the purpose of opening the patient's mouth. When the patient's mouth expands to an appropriate size, stop applying force.

[0073] Step 4: After use, the oral expander can be removed by simply pulling the head of the limiting bolt rod 255 away from the arc-shaped clamping strip 251.

[0074] Embodiment 2

[0075] like Figure 6 As shown, the difference between this embodiment and embodiment one is that the sliding connection method between the upper tension rod 310 and the upper slide rod 210 is different, the sliding connection method between the lower tension rod 320 and the lower slide rod 220 is different, and the connection relationship between the one-way self-locking component 250 and the operating body 230 and the matching body 240 is different.

[0076] In this embodiment, one end of the upper tension rod 310 is slidably connected to the upper slide bar 210, and the other end is provided with an upper expander 311. Specifically, an upper sliding ring 313 is hingedly connected to the end of the upper tension rod 310 away from the upper expander 311. The upper sliding ring 313 is sleeved on the upper slide bar 210, and the upper sliding ring 313 is slidably connected to the upper slide bar 210. The upper tension rod 310 is slidably connected to the upper slide bar 210 through the upper sliding ring 313.

[0077] In this embodiment, one end of the lower tension rod 320 is slidably connected to the lower slide rod 220, and the other end is provided with a lower expansion piece 321. Specifically, the end of the lower tension rod 320 away from the lower expansion piece 321 is hinged with a lower sliding ring 323, and the lower sliding ring 323 is sleeved on the lower slide rod 220. The lower sliding ring 323 is slidably connected to the lower slide rod 220. The lower tension rod 320 is slidably connected to the lower slide rod 220 through the lower sliding ring 323.

[0078] In this embodiment, the arc-shaped clamping strip 251 is hinged to the matching body 240 , the self-locking member 252 is hinged to the operating body 230 , and the arc-shaped clamping strip 251 is inserted into the through groove 253 .

[0079] The present invention is described in detail above with reference to the accompanying drawings, but the embodiments of the present invention are not limited to the above embodiments. Those skilled in the art can make various modifications to the present invention based on the prior art, all of which belong to the protection scope of the present invention.

Claims

1. An oral dilator, comprising a support frame, a force-applying portion and an expansion portion, characterized in that: The force-applying part comprises an upper slide bar, a lower slide bar, an operating body and a matching body rotatably connected to the middle part of the operating body; the operating body and the matching body are provided with mutually cooperating one-way self-locking components; the operating body and the matching body both have a gripping end and a force-transmitting end; the force-transmitting end of the operating body is hinged to the upper slide bar; the force-transmitting end of the matching body is hinged to the lower slide bar; the upper slide bar and the lower slide bar are arranged side by side; the support frame is located between the upper slide bar and the lower slide bar; the upper slide bar is slidably provided with an upper guide rod fixed to the support frame, and the upper guide rod is perpendicular to the The upper slide bar; the lower slide bar is slidably provided with a lower guide bar fixed to the support frame, and the lower guide bar is perpendicular to the lower slide bar; the expansion part includes one or two upper tension rods and lower tension rods arranged in a one-to-one correspondence with each of the upper tension rods; one end of the upper tension rod is slidably connected to the upper slide bar, and the other end is provided with an upper expansion piece; one end of the lower tension rod is slidably connected to the lower slide bar, and the other end is provided with a lower expansion piece; the middle part of the upper tension rod and the middle part of the lower tension rod are both hinged to the support frame; the support frame encloses an area, and the upper expansion piece and the lower expansion piece are both located in the area.

2. An oral dilator according to claim 1, characterized in that: The gripping end of the operating body is provided with a first gripping ring; the gripping end of the matching body is provided with a second gripping ring.

3. An oral dilator according to claim 2, characterized in that: The inner wall of the first grip ring and / or the inner wall of the second grip ring are provided with anti-slip patterns.

4. An oral dilator according to claim 1, characterized in that: The upper expansion piece is hinged to the upper tension rod; the lower expansion piece is hinged to the lower tension rod.

5. An oral dilator according to claim 1, characterized in that: A connecting column is arranged in the middle of the operating body, and the matching body is indirectly rotatably connected to the operating body through the connecting column.

6. An oral dilator according to claim 1, characterized in that: The one-way self-locking component includes an arc-shaped clip and a self-locking part. The self-locking part is provided with a groove for the arc-shaped clip to pass through. The self-locking part is also provided with a limiter for limiting the movement of the arc-shaped clip. The arc-shaped clip is inserted into the groove. The arc-shaped clip is connected to the operating body and the self-locking part is connected to the matching body, or the arc-shaped clip is connected to the matching body and the self-locking part is connected to the operating body.

7. An oral dilator according to claim 1, characterized in that: The support frame is provided with upper rotating columns and lower rotating columns arranged one-to-one corresponding to each of the upper rotating columns; The number of the upper rotating column is one, the number of the upper tension rod is one, the middle part of the upper tension rod is connected to the upper rotating column by rotation and is hinged to the support frame, and the middle part of the lower tension rod arranged corresponding to the upper tension rod is connected to the lower rotating column by rotation and is hinged to the support frame; or, The number of the upper rotating column is one, the number of the upper tensioning rods is two, the middle parts of the two upper tensioning rods are connected to the upper rotating column by rotation and are hinged to the support frame, and the middle parts of the lower tensioning rods arranged corresponding to the upper tensioning rods are connected to the lower rotating column by rotation and are hinged to the support frame; or, There are two upper rotating columns and two upper tension rods. The middle parts of the two upper tension rods are hinged to the support frame by being rotationally connected to the two upper rotating columns in a one-to-one manner. The middle parts of the lower tension rods corresponding to the upper tension rods are hinged to the support frame by being rotationally connected to the lower rotating columns. The lower rotating column to which any lower tension rod is rotationally connected corresponds to the upper rotating column to which the upper tension rod corresponding to the lower tension rod is rotationally connected.

8. An oral dilator according to claim 1, characterized in that: The upper sliding rod is provided with an upper sliding groove arranged along the length direction of the upper sliding rod; the lower sliding rod is provided with a lower sliding groove arranged along the length direction of the lower sliding rod; the end of the upper tension rod away from the upper expansion piece is hinged with an upper sliding piece, and the end of the lower tension rod away from the lower expansion piece is hinged with a lower sliding piece; the upper tension rod is slidably connected to the upper sliding groove through the upper sliding piece, and the lower tension rod is slidably connected to the lower sliding groove through the lower sliding piece.

9. An oral dilator according to claim 1, characterized in that: The end of the upper tension rod away from the upper expansion piece is hinged with an upper sliding ring, and the end of the lower tension rod away from the lower expansion piece is hinged with a lower sliding ring; the upper sliding ring is sleeved on the upper sliding rod, and the upper tension rod is slidably connected to the upper sliding rod through the upper sliding ring; the lower sliding ring is sleeved on the lower sliding rod, and the lower tension rod is slidably connected to the lower sliding rod through the lower sliding ring.

10. An oral dilator according to claim 8 or 9, characterized in that: A first protrusion is arranged at one end of the upper tension rod away from the upper expansion piece, and a second protrusion is arranged at one end of the lower tension rod away from the lower expansion piece.

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