阅读说明：本技术 一种口腔检查用口腔湿润器 (Oral cavity moistener for oral cavity examination ) 是由 蔡研 鄂长勇 韩光红 于 2021-09-02 设计创作，主要内容包括：本发明公开了一种口腔检查用口腔湿润器,包括安装架,所述安装架靠近顶部的侧壁固定连接有两个安装条,两个所述安装条之间通过滑动组件安装有两个压唇板,两个所述安装条的中部固定连接有顶板,所述顶板的下表面固定连接有储水囊,所述储水囊的底部固定连接有活动板,两个所述压唇板的相对面均滑动安装有安装块,所述安装块的侧壁上转动两个铰接杆,所述安装架的底部连接有使活动板上下运动的驱动机构。本发明通过调整两个压唇板之间的距离,便于适应不同患者的口型,在调节过程的同时,可将储水囊内部的水挤压至湿润头内部,从而极大的提高了口腔湿润效率和质量。(The invention discloses an oral cavity moistener for oral cavity examination, which comprises a mounting frame, wherein two mounting strips are fixedly connected to the side wall of the mounting frame close to the top, two lip pressing plates are mounted between the two mounting strips through a sliding assembly, a top plate is fixedly connected to the middle parts of the two mounting strips, a water storage bag is fixedly connected to the lower surface of the top plate, a movable plate is fixedly connected to the bottom of the water storage bag, mounting blocks are slidably mounted on the opposite surfaces of the two lip pressing plates, two hinge rods are rotated on the side wall of each mounting block, and a driving mechanism for enabling the movable plate to move up and down is connected to the bottom of the mounting frame. The invention is convenient to adapt to the mouth shapes of different patients by adjusting the distance between the two lip pressing plates, and can extrude the water in the water storage bag into the wetting head during the adjustment process, thereby greatly improving the wetting efficiency and quality of the oral cavity.)

1. An oral cavity moistener for oral cavity examination, includes mounting bracket (5), its characterized in that: the side wall of the mounting rack (5) close to the top is fixedly connected with two mounting strips (18), two lip pressing plates (1) are arranged between the two mounting strips (18) through a sliding assembly, the middle parts of the two mounting strips (18) are fixedly connected with a top plate (19), the lower surface of the top plate (19) is fixedly connected with a water storage bag (17), the bottom of the water storage bag (17) is fixedly connected with a movable plate (6), the opposite surfaces of the two lip pressing plates (1) are both provided with a mounting block (4) in a sliding way, two hinged rods (15) are rotated on the side wall of the mounting block (4), one ends of the two hinged rods (15) far away from the mounting block (4) are respectively and rotatably connected with the side walls of the movable plate (6) and the top plate (19) which are arranged on the same side of the hinged rods, the bottom of the mounting rack (5) is connected with a driving mechanism which enables the movable plate (6) to move up and down;

one of them the upper surface of mounting bar (18) is connected with through two sets of link mechanism and is used for the moist head (21) of oral cavity, communicate through the pipe between water storage bag (17) and moist head (21), pipe internally mounted has and is used for flowing to the inside one-way liquid valve of moist head (21).

2. The oral cavity moistener for oral examination according to claim 1, wherein: the driving mechanism comprises a screw rod (10), the screw rod (10) is connected to the bottom of the mounting frame (5) through a through hole in a threaded mode, a handle (11) is fixed to the bottom end of the screw rod (10), and a supporting plate (13) is fixedly connected to the top end of the screw rod (10).

3. The oral cavity moistener for oral examination according to claim 1, wherein: every group link mechanism includes fixed plate (22) and slide bar (32), fixed plate (22) pass through bracing piece (20) fixed connection at the upper surface of mounting bar (18), the one end of fixed plate (22) is rotated and is installed axis of rotation (31), fixedly connected with swinging arms (25) on axis of rotation (31), the other end of fixed plate (22) is rotated through the round pin axle and is installed four-bar linkage (27), a corner and swinging arms (25) lateral wall that four-bar linkage (27) round pin axle is located relatively rotates and is connected, slide bar (32) rotate through the round pin axle and connect in a corner that is close to axis of rotation (31) of four-bar linkage (27), second movable block (23) are installed to another corner of four-bar linkage (27) that slide bar (32) correspond, the one end that axis of rotation (31) was kept away from in slide bar (32) passes second movable block (23) and with second movable block (23) slidable mounting, the middle part cover of slide bar (32) is equipped with first rod cover (24), the cover is equipped with second rod cover (26) on swinging arms (25), rotate the installation through the round pin axle between second rod cover (26) and swinging arms (25), be connected with on fly leaf (6) and make axis of rotation (31) pivoted drive mechanism.

4. The oral cavity moistener for oral examination according to claim 3, wherein: the transmission mechanism comprises a vertical bar (16), the vertical bar (16) is fixedly connected to the upper surface of the movable plate (6), the top of the vertical bar (16) penetrates through the upper surface of the top plate (19) through a through hole and is fixedly connected with a rack (29), and one end, away from the swing rod (25), of the rotating shaft (31) is fixed with a gear (30) meshed with the rack (29).

5. The oral cavity moistener for oral examination according to claim 1, wherein: the bottom end of the movable plate (6) is fixedly connected with an elastic telescopic column (14).

6. The oral cavity moistener for oral examination according to claim 1, wherein: the sliding assembly comprises two groups of grooves (3), each group of grooves (3) are respectively arranged on the side walls of two mounting bars (18) and are arranged oppositely, each group of grooves (3) are internally and slidably provided with first movable blocks (2), and the first movable blocks (2) are rotatably arranged on the side walls of the lip pressing plates (1) through pin shafts.

7. The oral cavity moistener for oral examination according to claim 1, wherein: two spouts (9) have been seted up to the bottom of mounting bracket (5), two equal slidable mounting slider (8) in spout (9), two through-hole through connection has two connecting rods (7) respectively on slider (8), two one end that connecting rod (7) are close to installation piece (4) contacts with the outer wall of two pressure lip boards (1) respectively, two one end fixedly connected with shifting block (12) that connecting rod (7) are close to installation piece (4).

8. The oral cavity moistener for oral examination according to claim 1, wherein: the inside cotton that absorbs water that is provided with of wetting head (21), the outer wall of wetting head (21) is attached to there is the gauze.

9. The oral cavity moistener for oral examination according to claim 1, wherein: one end of the water storage bag (17) close to the top plate (19) is communicated with an air inlet (33), and a one-way air valve used for one-way air inlet is arranged inside the air inlet (33).

10. The oral moistener for oral examination according to claim 9, wherein: one end of the water storage bag (17) where the air inlet (33) is located is provided with a liquid inlet (34) for supplementing liquid.

Technical Field

The invention relates to the technical field of medical instruments, in particular to an oral cavity moistener for oral examination.

Background

Xerostomia refers to the condition that the patient feels dry in the mouth and insufficient secretion of body fluid, and the patient may be thirsty or does not want to drink water. Therefore, the cavity needs to be humidified, and in clinical practice, for a surgical patient, conventional fasting and water deprivation are performed before an operation so as to prevent the patient from suffering from cough and causing aspiration, liquid loss usually occurs during the operation, water-electrolyte alkali imbalance is caused, and food and water supply are stopped for a period of time after the operation. Therefore, some patients can inevitably take place the dry mouth, and current moistener for oral examination is in the use, when aiming at different crowds ' use, most lips prop open the mechanism, can't adjust, and the different patients ' mouth type of being not convenient for adapt to has brought the difficulty for moist process, influences work efficiency and quality.

Disclosure of Invention

The invention aims to provide an oral cavity moistener for oral cavity examination, which is convenient to adapt to the mouth shapes of different patients by adjusting the distance between two lip pressing plates, and can extrude water in a water storage bag into a moistening head during the adjustment process, thereby greatly improving the oral cavity moistening efficiency and quality and solving the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an oral cavity moistener for oral cavity examination comprises a mounting frame, wherein two mounting strips are fixedly connected to the side wall of the mounting frame close to the top, two lip pressing plates are mounted between the two mounting strips through a sliding assembly, a top plate is fixedly connected to the middle parts of the two mounting strips, a water storage bag is fixedly connected to the lower surface of the top plate, a movable plate is fixedly connected to the bottom of the water storage bag, mounting blocks are slidably mounted on the opposite surfaces of the two lip pressing plates, two hinge rods are rotated on the side wall of the mounting block, one ends of the two hinge rods, far away from the mounting block, are respectively and rotatably connected with the movable plate and the side wall of the top plate which are arranged at the same side of the hinge rods, and a driving mechanism for enabling the movable plate to move up and down is connected to the bottom of the mounting frame;

one of them the upper surface of mounting bar is connected with through two sets of link mechanism and is used for the moist head of oral cavity moist, through the pipe intercommunication between water storage bag and the moist head, pipe internally mounted has and is used for flowing to the inside one-way liquid valve of moist head.

Preferably, actuating mechanism includes the screw rod, the screw rod passes through-hole threaded connection in the bottom of mounting bracket, the bottom mounting of screw rod has the handle, the top fixedly connected with of screw rod supports the board.

Preferably, each group of link mechanisms comprises a fixed plate and a slide rod, the fixed plate is fixedly connected to the upper surface of the mounting bar through a support rod, one end of the fixed plate is rotatably provided with a rotating shaft, a swing rod is fixedly connected to the rotating shaft, the other end of the fixed plate is rotatably provided with a four-link rod through a pin shaft, one corner of the four-link rod, where the pin shaft is located, is rotatably connected with the side wall of the swing rod, the slide rod is rotatably connected to one corner of the four-link rod, which is close to the rotating shaft, through the pin shaft, a second movable block is arranged at the other corner of the four-link rod, which corresponds to the slide rod, one end of the slide rod, which is far away from the rotating shaft, penetrates through the second movable block and is slidably mounted with the second movable block, a first rod sleeve is sleeved at the middle part of the slide rod, a second rod sleeve is sleeved on the swing rod, and is rotatably mounted between the second rod sleeve and the swing rod through the pin shaft, the movable plate is connected with a transmission mechanism which enables the rotating shaft to rotate.

Preferably, drive mechanism includes the vertical retort, vertical retort fixed connection is at the upper surface of fly leaf, the top of vertical retort passes the upper surface of roof and fixedly connected with rack through the through-hole, the one end that the swinging arms was kept away from to the axis of rotation be fixed with rack toothing's gear.

Preferably, the bottom end of the movable plate is fixedly connected with an elastic telescopic column.

Preferably, the sliding assembly comprises two groups of grooves, each group of grooves is formed in the side walls of the two mounting bars respectively and is arranged oppositely, each group of grooves is internally provided with a first movable block in a sliding mode, and the first movable blocks are rotatably mounted on the side walls of the lip pressing plates through pin shafts.

Preferably, two chutes are formed in the bottom of the mounting frame, two sliding blocks are slidably mounted inside the chutes, two connecting rods are respectively connected to the two sliding blocks in a penetrating manner through holes, two connecting rods are respectively in contact with the outer walls of the two lip pressing plates at the ends, close to the mounting block, and two connecting rods are fixedly connected with shifting blocks at the ends, close to the mounting block, of the connecting rods.

Preferably, the wetting head is internally provided with absorbent cotton, and the outer wall of the wetting head is attached with gauze.

Preferably, one end of the water storage bag close to the top plate is communicated with an air inlet, and a one-way air valve for one-way air inlet is installed inside the air inlet.

Preferably, one end of the water storage bag where the air inlet is located is provided with a liquid inlet for supplementing liquid.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the movable plate moves upwards through the arranged driving mechanism, so that the water storage bag can be extruded, the water in the water storage bag can be extruded into the wetting head due to the guide pipe and the one-way liquid valve arranged in the guide pipe, and meanwhile, when the movable plate ascends, the lip pressing plates on two sides can move away from each other under the action of the hinge rods hinged on two sides and the mounting block, so that the oral cavity of a patient can be opened, meanwhile, the distance between the two lip pressing plates can be adjusted according to the ascending height of the movable plate, the mouth wetting device is convenient to adapt to the mouth shapes of different patients, and the oral cavity wetting efficiency and quality are greatly improved.

2. According to the invention, through the arrangement of the sliding assembly and the elastic telescopic action of the elastic telescopic column, when the oral cavity of a patient is expanded through the two lip pressing plates, the two lip pressing plates can be subjected to micro-adjustment of relative or back-to-back movement, the micro-movement of the lips of the patient can be realized, and the adverse effect caused by long-time fixed support is avoided.

3. The invention can further realize the up-and-down movement of the movable plate by fixing the top plate, matching with the contraction action of the elastic telescopic column and the connection relation of the hinged rod, thereby driving the vertical bar and the rack arranged at the top of the vertical bar to move up and down, further realizing the back-and-forth swing of the swing rod due to the meshing action of the rack and the gear, and continuously extruding the absorbent cotton in the wetting head through the contraction or expansion movement of the wetting head as the upper end point of the four-connecting rod is in limit rotation with the fixed plate and the lower end point of the four-connecting rod is in rotation connection with the side wall of the swing rod and is matched with the second movable block to be slidably arranged on the slide rod, when the swing rod deflects, the four-connecting rod can be further driven to perform the contraction or expansion movement, and the extruded water enters the gauze attached to the outer wall of the wetting head, thereby timely replenishing water to the gauze, and simultaneously a patient can realize the dry and wet conditions in the oral cavity, the opening and closing degree of the lips can be controlled, and the lips can also be adjusted by stirring the shifting block, so that the degree of relative or back-to-back movement of the two lip pressing plates is changed, the degree of gauze water replenishing can be adjusted, and the dry and wet degree of the oral cavity is convenient to improve.

4. According to the invention, through further arrangement of the structure, the four-bar linkage type oral cavity moistening device is matched with the first bar sleeve and can slide on the sliding bar, the second bar sleeve can slide on the swinging bar, and the second bar sleeve is rotatably connected with the first bar sleeve, so that the four-bar linkage type oral cavity moistening device can further drive the four-bar linkage to integrally do arc-shaped swinging around the end point of the fixing plate, and simultaneously, the action areas of the moistening head on different parts are changed when the moistening head is matched to contract or expand, thereby greatly improving the moistening range of the oral cavity and avoiding adverse effects caused by local incapability of moistening.

Drawings

FIG. 1 is a schematic front perspective view of the present invention;

FIG. 2 is a schematic side-view perspective of the present invention;

FIG. 3 is a schematic view of a partial enlarged perspective structure of the present invention;

FIG. 4 is a schematic cross-sectional perspective view of the present invention;

fig. 5 is a schematic front view of the present invention.

In the figure: 1. a lip pressing plate; 2. a first movable block; 3. a groove; 4. mounting blocks; 5. a mounting frame; 6. a movable plate; 7. a connecting rod; 8. a slider; 9. a chute; 10. a screw; 11. a handle; 12. shifting blocks; 13. a resisting plate; 14. an elastic telescopic column; 15. a hinged lever; 16. vertical bars; 17. a water storage bag; 18. mounting a bar; 19. a top plate; 20. a support bar; 21. wetting the head; 22. a fixing plate; 23. a second movable block; 24. a first rod sleeve; 25. a swing lever; 26. a second rod sleeve; 27. a four-bar linkage; 29. a rack; 30. a gear; 31. a rotating shaft; 32. a slide bar; 33. an air inlet; 34. and (4) a liquid inlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 5, the present invention provides a technical solution: an oral cavity moistener for oral cavity examination comprises a mounting frame 5, wherein two mounting strips 18 are fixedly connected to the side wall, close to the top, of the mounting frame 5, two lip pressing plates 1 are mounted between the two mounting strips 18 through a sliding assembly, a top plate 19 is fixedly connected to the middle parts of the two mounting strips 18, a water storage bag 17 is fixedly connected to the lower surface of the top plate 19, a movable plate 6 is fixedly connected to the bottom of the water storage bag 17, mounting blocks 4 are slidably mounted on the opposite surfaces of the two lip pressing plates 1, two hinge rods 15 are rotated on the side wall of each mounting block 4, one ends, far away from the mounting blocks 4, of the two hinge rods 15 are respectively and rotatably connected with the movable plate 6 and the side wall of the top plate 19 which are arranged at the same side of the two hinge rods, and a driving mechanism for enabling the movable plate 6 to move up and down is connected to the bottom of the mounting frame 5;

the upper surface of one of the mounting bars 18 is connected with a wetting head 21 for wetting the oral cavity through two groups of link mechanisms, the water storage bag 17 is communicated with the wetting head 21 through a conduit, and a one-way liquid valve for flowing to the inside of the wetting head 21 is arranged in the conduit.

Through the actuating mechanism who sets up, further make 6 upward movements of fly leaf, the ascending motion through fly leaf 6, can extrude water storage bag 17, because the one-way liquid valve of pipe and inside setting, can extrude the inside water of water storage bag 17 to moist head 21 inside, when ascending through fly leaf 6 simultaneously, the effect of cooperation both sides articulated hinge bar 15 and installation piece 4, can realize the pressure lip board 1 of both sides and move apart from each other, thereby alright strut the patient oral cavity, and simultaneously, according to the rise height of fly leaf 6, adjust two distances between the pressure lip board 1, be convenient for adapt to different patients' mouth type, thereby the very big moist efficiency in oral cavity and the quality of having improved.

Further, actuating mechanism includes screw rod 10, and screw rod 10 passes through-hole threaded connection in the bottom of mounting bracket 5, and the bottom mounting of screw rod 10 has handle 11, and the top fixedly connected with of screw rod 10 supports board 13.

By manually rotating the screw 10, the screw 10 is screwed up and drives the abutting plate 13 to move upwards.

Further, each group of link mechanisms comprises a fixed plate 22 and a sliding rod 32, the fixed plate 22 is fixedly connected to the upper surface of the mounting bar 18 through a support rod 20, one end of the fixed plate 22 is rotatably provided with a rotating shaft 31, a swinging rod 25 is fixedly connected to the rotating shaft 31, the other end of the fixed plate 22 is rotatably provided with a four-link 27 through a pin shaft, one corner of the four-link 27 corresponding to the pin shaft is rotatably connected with the side wall of the swinging rod 25, the sliding rod 32 is rotatably connected to one corner of the four-link 27 close to the rotating shaft 31 through the pin shaft, the other corner of the four-link 27 corresponding to the sliding rod 32 is provided with a second movable block 23, one end of the sliding rod 32 far away from the rotating shaft 31 penetrates through the second movable block 23 and is slidably mounted with the second movable block 23, the middle part of the sliding rod 32 is sleeved with a first rod sleeve 24, the swinging rod 25 is sleeved with a second rod sleeve 26, and the second rod sleeve 26 is rotatably mounted with the swinging rod 25 through the pin shaft, the movable plate 6 is connected to a transmission mechanism for rotating the rotating shaft 31.

Because the upper end point of the four-bar linkage 27 is limited to rotate with the fixed plate 22, the lower end point of the four-bar linkage 27 is rotatably connected with the side wall of the swing rod 25, the second movable block 23 is matched to be slidably mounted on the slide rod 32, when the swing rod 25 deflects, the four-bar linkage 27 can be further driven to contract or expand, the four-bar linkage 27 can be further driven to do arc-shaped swinging around the end point of the fixed plate 22 through the contraction or expansion movement of the wetting head 21 and the cooperation of the first rod sleeve 24 and the second rod sleeve 26 which can slide on the swing rod 25 as well as the rotation connection between the second rod sleeve 26 and the first rod sleeve 24, and the wetting head 21 is matched to change the action areas of different parts when contracting or expanding, so that the wetting range of the oral cavity is greatly improved, and the adverse effect caused by the fact that the parts cannot be wetted locally is avoided.

Further, the transmission mechanism comprises a vertical bar 16, the vertical bar 16 is fixedly connected to the upper surface of the movable plate 6, the top of the vertical bar 16 passes through the upper surface of the top plate 19 through a through hole and is fixedly connected with a rack 29, and a gear 30 meshed with the rack 29 is fixed to one end of the rotating shaft 31 far away from the swinging rod 25.

Through the transmission mechanism, when the movable plate 6 moves up and down, the vertical bar 16 and the rack 29 arranged on the top of the vertical bar can be driven to move up and down, and the swinging of the swinging rod 25 can be further realized due to the meshing action of the rack 29 and the gear 30.

Further, the bottom end of the movable plate 6 is fixedly connected with an elastic telescopic column 14.

When the two lip pressing plates 1 are subjected to fine adjustment of relative or back-to-back movement, the movable plate 6 can further move up and down by fixing the top plate 19 and matching with the contraction action of the elastic telescopic column 14 and the connection relation of the hinge rod 15.

Further, the sliding assembly comprises two groups of grooves 3, each group of grooves 3 is respectively arranged on the side walls of the two mounting bars 18 and is arranged oppositely, a first movable block 2 is slidably mounted inside each group of grooves 3, and the first movable blocks 2 are rotatably mounted on the side walls of the lip pressing plates 1 through pin shafts.

Because sliding assembly's setting, first movable block 2 can slide in recess 3 is inside, and the flexible effect of elasticity of cooperation elastic expansion post 14 can carry out the fine-tuning of relative or back of the body motion to two pressure lip boards 1, can realize the fine motion of patient's lip, avoids the adverse effect that long-time support brought.

Example two

Compare with embodiment one, furthermore, two spouts 9 have been seted up to the bottom of mounting bracket 5, and two equal slidable mounting sliders 8 in spout 9 are gone up through the through-hole and are had two connecting rods 7 respectively, and two connecting rods 7 are close to the one end of installation piece 4 and are contacted with the outer wall of two pressure lip boards 1 respectively, and two connecting rods 7 are close to the one end fixedly connected with shifting block 12 of installation piece 4.

To the relative or back-to-back movement's of two pressure lip boards 1 fine adjustment, can also drive two connecting rods 7 and be close to each other through manual pushing shifting block 12 to extrude two pressure lip boards 1, the flexible post 14 that the cooperation set up realizes two and presses the reseing of lip board 1 after the motion.

Furthermore, the wetting head 21 is provided with absorbent cotton inside, and gauze is attached to the outer wall of the wetting head 21.

Through the cotton that absorbs water that sets up, when the shrink of moist head 21 or the expansion motion, can constantly extrude moist head 21 inside cotton that absorbs water, on the water entering moist head 21 outer wall adnexed gauze after the extrusion, alright carry out timely moisturizing to the gauze, through the degree of extrusion, be convenient for adjust the wet degree of gauze simultaneously.

Furthermore, one end of the water storage bag 17 close to the top plate 19 is communicated with an air inlet 33, and a one-way air valve for one-way air inlet is installed inside the air inlet 33.

Through the one-way air valve that sets up in the air inlet 33, when carrying out relative or back of the body motion's fine setting festival to two pressure lip boards 1, can further realize the up-and-down motion of fly leaf 6 to can be to the continuous extrusion of water storage bag 17, constantly admit air through air inlet 33, be convenient for further extrude the water of water storage bag 17 to moist head 21 inside, thereby guarantee that the cotton moisture that absorbs water is sufficient.

Further, one end of the water storage bag 17 where the air inlet 33 is located is provided with a liquid inlet 34 for supplementing liquid.

Through the liquid inlet 34, the water storage bag 17 can be supplemented with enough water source.

The working principle is as follows: the oral cavity moistener for oral cavity examination, when in use, can supplement enough water source to the inside of the water storage bag 17 through the arranged liquid inlet 34, firstly put the body of the oral cavity moistener into the oral cavity of a patient, then adjust the distance between two lip pressing plates 1 according to the mouth shape of the patient, manually rotate the screw rod 10 to lead the screw rod 10 to spirally rise and drive the abutting plate 13 to move upwards, further lead the movable plate 6 to move upwards due to the connection effect of the elastic telescopic column 14, extrude the water storage bag 17 through the rising motion of the movable plate 6, can extrude the water in the water storage bag 17 to the inside of the wetting head 21 due to the conduit and the one-way liquid valve arranged in the conduit, and can realize the separated motion of the lip pressing plates 1 at both sides by matching with the hinged rod 15 and the mounting block 4 at both sides when the movable plate 6 rises, thereby being capable of opening the oral cavity of a patient, and greatly improving the oral cavity moistening efficiency and quality;

when the two lip pressing plates 1 are used for propping open the oral cavity of a patient, due to the arrangement of the sliding assembly and the elastic telescopic action of the elastic telescopic column 14, the two lip pressing plates 1 can be subjected to micro-adjustment of relative or back-to-back movement, the micro-movement of the lips of the patient can be realized, and the adverse effect caused by long-time fixed support is avoided;

when the two lip pressing plates 1 are subjected to fine adjustment of relative or opposite movement, the movable plate 6 can further move up and down by fixing the top plate 19 and matching with the contraction action of the elastic telescopic column 14 and the connection relation of the hinge rod 15, so that the vertical bar 16 and the rack 29 arranged at the top of the vertical bar are driven to move up and down, the oscillating rod 25 can further swing back and forth due to the meshing action of the rack 29 and the gear 30, the four-bar 27 can further drive the four-bar 27 to contract or expand when the oscillating rod 25 deflects due to the limit rotation of the upper end point of the four-bar 27 and the fixed plate 22 and the lower end point of the four-bar 27 and the side wall of the oscillating rod 25 are rotatably connected and matched with the second movable block 23 to be slidably installed on the sliding rod 32, the absorbent cotton in the wetting head 21 can be continuously extruded by the contraction or expansion movement of the wetting head 21, and the extruded water enters the gauze attached to the outer wall of the wetting head 21, the gauze can be supplemented with water in time, and simultaneously, the opening and closing degree of the lips can be controlled by a patient according to the dry and wet condition in the oral cavity, so that the degree of relative or back-to-back movement of the two lip pressing plates 1 is changed, and the gauze water supplementing degree can be adjusted;

through further arrangement of the structure, the first rod sleeve 24 can slide on the sliding rod 32 in a matching mode, the second rod sleeve 26 can slide on the swinging rod 25, and the second rod sleeve 26 is connected with the first rod sleeve 24 in a rotating mode, so that the four-link 27 can be further driven to integrally swing in an arc mode around the end point of the fixing plate 22, and meanwhile, the action area of the wetting head 21 on different positions can be changed when the wetting head 21 contracts or expands.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.