Oral cavity medical equipment

Abstract

The utility model belongs to the technical field of oral medical equipment, and relates to oral medical equipment which comprises a handle and a liquid supply device which are connected with each other, the liquid supply device comprises a waterway control structure and at least three liquid storage pieces; the liquid storage pieces are connected to the handle through the water path control structure, different liquids are stored in the liquid storage pieces, and the water path control structure can selectively output the different liquids to the handle. The liquid supply device of the oral cavity medical equipment comprises the at least three liquid storage pieces, each liquid storage piece is connected into the water path control structure, and due to the fact that each liquid storage piece provides different liquids, one of the liquids can be selected at will to be output to the handle through control of the water path control structure, and the liquid supply device is convenient to use. According to the technical scheme, rapid switching of multiple kinds of liquid can be achieved under the condition that the liquid in the liquid storage part is not replaced, operation is easy, switching efficiency is high, the working efficiency of doctors can be effectively improved, in addition, the situation that different kinds of liquid are stored in the same liquid storage part does not exist, and therefore liquid pollution can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of oral medical equipment, and more specifically, to an oral medical equipment. Background Art

[0002] Dental medical equipment used in oral treatment often uses a tooth cleaning machine, which usually includes a liquid reservoir, a connecting tube and a handle. The liquid reservoir is used to store liquid, and the liquid can flow into the handle through the connecting tube. The medical staff controls the handle to perform tooth cleaning and flushing. In the actual oral treatment process, a variety of different treatment liquids need to be used in succession according to the actual condition of the disease. According to the design of the liquid reservoir of the tooth cleaning machine in the prior art, when it is necessary to switch to different liquids, it is necessary to pause the treatment and pour out the liquid in the liquid reservoir, and then perform operations such as cleaning, drying and pouring new liquid. This greatly reduces the treatment efficiency and cannot meet the doctor's high-efficiency work requirements. In addition, the risk of liquid contamination is easily caused during the liquid replacement process. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the design of the liquid storage device cannot meet the high-efficiency work of doctors and there is a risk of contamination.

[0004] In order to solve the above technical problems, the utility model provides an oral medical device, including a handle and a liquid supply device connected to each other;

[0005] The liquid supply device includes a water channel control structure and at least three liquid storage parts;

[0006] The liquid storage parts are connected to the handle via the water channel control structure, each of the liquid storage parts stores different liquids, and the water channel control structure can selectively output different liquids to the handle.

[0007] Furthermore, the first liquid storage member has at least two grooves, each groove is provided with a pair of elastic arms, and the second liquid storage member is installed on the grooves through the elastic arms.

[0008] Further, the handle includes a tail wire connector and a handle body;

[0009] One end of the tail line connector is connected to the water channel control structure, and the other end is suitable for being connected to a handle body corresponding to different liquids when conveying different liquids.

[0010] The handle body comprises a first connecting piece, and the tail wire connector is sealedly connected to the first connecting piece;

[0011] Among them, one of the first connecting member and the tail wire connector is provided with a plurality of sockets, and the other is provided with a plurality of pins, a boss is provided between at least two of the pins, and an area between the plurality of sockets is provided with a gap matching the boss, and the sockets, the pins, the bosses and the gaps constitute an anti-foolproof structure.

[0012] Furthermore, the liquid storage member includes a first liquid storage member and at least two second liquid storage members, and the second liquid storage members are detachably installed at adjacent positions of the first liquid storage member.

[0013] Furthermore, the second liquid storage member includes a main body, a cover body and a transfer member;

[0014] The main body and the cover body are detachably and hermetically connected, and the cover body and the adapter are detachably and hermetically connected.

[0015] Furthermore, the cover body has an axial through hole, the outer wall of the adapter and / or the hole wall of the axial through hole are provided with at least one third annular groove, a third seal is provided in the third annular groove, and the adapter is interference fit with the third seal in the axial through hole.

[0016] Furthermore, the waterway control structure includes a liquid driving component, a control component and a plurality of liquid delivery pipelines;

[0017] The first liquid storage member and each of the second liquid storage members are independently connected to the liquid driving member through a liquid infusion pipeline, the liquid infusion pipeline is provided with the control member, and each of the control members independently controls the opening and closing of the corresponding liquid infusion pipeline;

[0018] The liquid driving member is detachably connected to the handle via a connecting tube.

[0019] Furthermore, the handle further comprises a first tube, a second tube and a second connecting member, wherein the first connecting member has a flow channel;

[0020] The first pipe is sleeved on the second pipe;

[0021] One end of the second pipe is sunk inside the first pipe to form a mounting cavity defined by the end surface of the second pipe and the inner wall of the first pipe; the first connector is partially disposed in the mounting cavity and sealedly connected to the second pipe; the flow channel is connected to the second pipe to form a liquid infusion channel;

[0022] The other end of the second pipe partially extends out of the first pipe to form a first installation gap defined by the outer wall of the first pipe and the inner wall of the first pipe. The second connecting member is partially arranged in the first installation gap and sealedly connected to the second pipe.

[0023] Further, the first connecting member has a first outer step, the inner wall of the second pipe member and / or the outer wall of the first connecting member has at least one first annular groove, and a first sealing member is arranged in the first annular groove;

[0024] The first connecting member is partially inserted into the second pipe member and is interference-fitted with the first sealing member, and the first outer step abuts against the end surface of the liquid inlet end of the second pipe member.

[0025] Furthermore, the inner diameter of the inner cavity of the second tube gradually decreases from its liquid inlet end to its liquid outlet end; and / or

[0026] The inner diameter of the flow channel of the first connecting member gradually decreases from the liquid inlet end to the liquid outlet end.

[0027] Further, the second connecting member has an axial channel, at least one second annular groove is provided in the axial channel or on the outer wall of the second pipe, a second sealing member is provided in the second annular groove, and the second pipe is interference-fitted with the second sealing member in the axial channel; wherein,

[0028] The axial channel has a first inner step, the second pipe has a second outer step, and the first inner step abuts against the second outer step; and / or

[0029] The second tube is disposed through the second connecting member, and a second installation gap is formed between the outer wall of the second tube and the inner wall of the second connecting member, and the second installation gap is used for installing a needle.

[0030] Compared with the prior art, the utility model has the following beneficial effects:

[0031] The liquid supply device of the oral medical equipment provided by the utility model includes at least three liquid storage parts, each of which is involved in a water circuit control structure. Since each liquid storage part provides different liquids, one of the various liquids can be arbitrarily selected to be output to the handle through the control of the water circuit control structure. Without replacing the liquid in the liquid storage part, rapid switching of multiple liquids can be achieved. The operation is simple and the switching efficiency is high, which can effectively improve the work efficiency of the doctor. In addition, there is no situation where different liquids are stored in the same liquid storage part, so the occurrence of liquid contamination can also be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments of the present invention or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 It is a structural schematic diagram of an oral medical device according to an embodiment of the utility model.

[0034] Figure 2 It is a structural schematic diagram of the second liquid storage member of an embodiment of the utility model;

[0035] Figure 3 yes Figure 2 A is an enlarged schematic diagram;

[0036] Figure 4 It is a schematic diagram of the internal structure of the oral medical device according to an embodiment of the utility model.

[0037] Figure 5 This is a schematic diagram of the three-dimensional structure of the handle of the embodiment of the utility model in a split state;

[0038] Figure 6 yes Figure 5 A schematic diagram of the cross-sectional structure of the handle along the axial direction;

[0039] Figure 7 yes Figure 5 Schematic diagram of the structure of the first connecting member.

[0040] Figure 8 yes Figure 5 A schematic diagram of the structure of the tail line connector;

[0041] Fig. 9 yes Figure 6 The enlarged schematic diagram of point B in FIG.

[0042] Fig.10 yes Figure 6 The enlarged schematic diagram of point C in FIG.

[0043] Reference numerals:

[0044] 100-handle; 110-first pipe; 111-installation cavity; 112-first installation gap; 120-second pipe; 121-first annular groove; 122-first sealing member; 123-end face; 124-second outer step; 125-annular avoidance groove; 130-first connecting member; 131-flow channel; 132-first outer step; 133-jack; 134-avoidance groove; 140-second connecting member; 141-axial channel; 142-second annular groove; 143-second sealing member; 144-first Inner step; 145-second installation gap; 150-tail wire connector; 151-pin; 152-boss; 200-liquid supply device; 210-first liquid storage member; 211-groove; 212-elastic arm; 220-second liquid storage member; 221-main body; 222-cover body; 222a-axial through hole; 222b-third annular groove; 222c-third sealing member; 223-adapter; 224-infusion pipeline; 230-connecting tube; 240-liquid drive member; 250-control member; 260-control panel. DETAILED DESCRIPTION

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the utility model; the terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model; the terms "including" and "having" and any variations thereof in the specification and claims of the utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the utility model or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order.

[0046] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0047] refer to Figure 1 An embodiment of the utility model provides an oral medical device, which includes a handle 100 and a liquid supply device 200. The liquid supply device 200 is connected to the handle 100 through a connecting tube 230 to infuse liquid into the handle 100.

[0048] Wherein, the liquid supply device 200 includes a water channel control structure and at least three liquid storage parts; the liquid storage parts are connected to the handle 100 through the water channel control structure, each of the liquid storage parts stores different liquids, and the water channel control structure can selectively output different liquids to the handle 100.

[0049] The liquid supply device of the oral medical equipment provided by the embodiment of the utility model includes at least three liquid storage parts, each of which is involved in the water circuit control structure. Since each liquid storage part provides different liquids, such as flushing liquid, chlorine-containing disinfectant, pure water, etc., through the control of the water circuit control structure, one of the various liquids can be arbitrarily selected and output independently to the handle 100. Due to the presence of multiple liquid storage parts, rapid switching of multiple liquids can be achieved during the work process without replacing the liquid in the liquid storage part. The operation is simple and the switching efficiency is high, which can effectively improve the work efficiency of the doctor. In addition, due to the presence of multiple liquid storage parts, there is no need to store different liquids in the same liquid storage part, so the occurrence of liquid contamination can also be avoided.

[0050] In one embodiment, the liquid storage component includes a first liquid storage component 210 and at least two second liquid storage components 220, and the second liquid storage components 220 are detachably installed at adjacent positions of the first liquid storage component 210; the design of the detachable installation of the second liquid storage component 220 allows for convenient and quick replacement when the liquid in the second liquid storage component 220 is used up or other second liquid storage components 220 need to be replaced.

[0051] For the convenience of explanation, the following text and the accompanying drawings mainly use the liquid supply device 200 including three liquid storage parts (a first liquid storage part 210 and two second liquid storage parts 220) as an example for explanation, which does not constitute an exclusive limitation on the technical solution of the present utility model.

[0052] In one embodiment, the first liquid storage member 210 and the second liquid storage member 220 have different volumes. Specifically, the volume of the first liquid storage member 210 is larger than that of the second liquid storage member 220 . The second liquid storage member 220 can be provided on one side of the first liquid storage member 210 as an accessory of the first liquid storage member 210 .

[0053] In one embodiment, the first liquid storage member 210 has at least two grooves 211 , each groove 211 is provided with a pair of elastic arms 212 , and the second liquid storage member 220 is installed on the groove 211 via the elastic arms 212 .

[0054] In one embodiment, Figure 2 and Figure 3As shown, the second liquid storage part 220 includes a main body 221, a cover 222 and a transfer part 223, wherein the main body 221 and the cover 222 are detachably sealed and connected, and the cover 222 and the transfer part 223 are detachably sealed and connected; the detachable and sealed connection structure of the three parts can facilitate the disassembly and cleaning of each component, and facilitate the rapid replacement of the second liquid storage bottle 220. In this embodiment, the size of the cover 222 meets the general standard and is suitable for the installation of general reagent bottles.

[0055] In one embodiment, the cover body 222 has an axial through hole 222a, the outer wall of the adapter 223 is provided with at least one third annular groove 222b, a third seal 222c is provided in the third annular groove 222b, and the adapter 223 is interference fit with the third seal 222c in the axial through hole 222a.

[0056] In other embodiments, the third annular groove 222b may also be provided on the hole wall of the axial through hole 222a, or the hole wall of the axial through hole 222a and the outer wall of the adapter 223 may both be provided with the third annular groove 222b, which may also achieve the effect of interference fit sealing.

[0057] In one embodiment, Figure 4 As shown, the water circuit control structure includes a liquid driving component 240, a control component 250 and a plurality of liquid infusion pipes 224; the first liquid storage component 210 and each of the second liquid storage components 220 are independently connected to the liquid driving component 240 through a liquid infusion pipe 224, the liquid infusion pipe 224 is provided with the control component 250, and each of the control components 250 works independently; the liquid driving component 240 is detachably connected to the handle 100 through a connecting tube 230.

[0058] In this embodiment, there are multiple control components 250, each of which controls the opening and closing of an infusion pipe 224, and only one control component 250 opens the infusion pipe 224 in each time period, while the rest are closed. For example, the first liquid storage component 210 is connected to the liquid driving component 240 through an infusion pipe 224, and the infusion pipe 224 is controlled to be in an open state by the corresponding control component 250, while the infusion pipe 224 connected to the second liquid storage component 220 is controlled to be in a closed state by the corresponding control component 250. At this time, the liquid in the first liquid storage component 210 will be transported to the handle 110 through the connecting tube 230, while the liquid in the second liquid storage component 220 cannot be output. In this way, the separate output of any liquid can be achieved, thereby realizing the switching of different liquid storage components to output different liquids to meet the doctor's usage needs.

[0059] In a specific example, the liquid driving component 240 is a water pump, and the control component 250 is a solenoid valve.

[0060] In one embodiment, Figure 1 As shown, the water channel control structure also includes a control panel 600, through which the liquid driving component 240 and the control component 250 can be controlled, which is convenient for doctors to operate and can effectively improve the doctors' work efficiency.

[0061] Please refer to Figure 5 and Figure 6 The handle 100 may be a flusher handle, which includes a handle body and a tail wire connector 150. One end of the tail wire connector 150 is connected to the waterway control structure, and the other end is suitable for connecting to the handle body corresponding to different liquids when conveying different liquids. Through the separate structure of the handle body and the tail wire connector 150, it can be applied in various scenarios, and the handle 100 for different liquids can be quickly replaced for different scenarios.

[0062] In this embodiment, the handle body includes a first tube member 110 , a second tube member 120 , a first connecting member 130 and a second connecting member 140 , and the first connecting member 130 has a flow channel 131 .

[0063] The tail wire connector 150 is sealedly connected to the first connector 130 , and an anti-foolproof structure is provided between the first connector 130 and the tail wire connector 150 , so that the handle 100 can be quickly replaced.

[0064] In other embodiments, the handle 100 may also be a dental scaler handle, which has the same connection structure as the irrigator handle, such as the first connecting member 130 and the second connecting member 140, and a foolproof structure, and can be easily and quickly disassembled to achieve a quick switch between the irrigator handle and the dental scaler handle. The structure of the irrigator handle is mainly described below.

[0065] In this embodiment, if Figure 7 and Figure 8As shown, a plurality of sockets 133 are provided at one end of the first connecting member 130 away from the second pipe member 120, and correspondingly, a plurality of plug posts 151 are provided at the liquid outlet end of the tail line connector 150, a boss 152 is provided between at least two of the plug posts 151, and an air avoidance groove 134 adapted to the boss 152 is provided in the area between the plurality of sockets 133, the sockets 133, the plug posts 151, the boss 152 and the air avoidance groove 134 constitute the fool-proof structure, when the first connecting member 130 is connected to the tail line connector 150, each of the plug posts 151 will be inserted into the corresponding socket 133, and only when the boss 152 is aligned with the air avoidance groove 134, can the first connecting member 130 and the tail line connector 150 be seamlessly connected, and the design of the boss 152 and the air avoidance groove 134 can avoid incorrect connection between the first connecting member 130 and the tail line connector 150, and can achieve quick plug-in or replacement.

[0066] In other embodiments, the boss 152 between two plug posts 151 may exist independently of the plug posts 151, or may be connected to the adjacent plug posts 151 as a whole; correspondingly, the avoidance groove 134 between two plug holes 133 may exist independently of the plug holes 133, or may be connected to the adjacent plug holes 133; Figure 7 and Figure 8 The diagrams respectively show that the boss 152 is connected to the plug post 151 as a whole, and the plug hole 133 is connected to the air avoidance groove 134 .

[0067] In other embodiments, the positions of the jack 133 and the pin 151 can be relatively replaced, that is, the jack 133 is provided on the tail wire connector 150, and the pin 151 is provided on the first connector 130, or the tail wire connector 150 and the first connector 130 are both provided with the jack 133 and the pin 151, which can also achieve an anti-mistake effect.

[0068] In one embodiment, the first tube fitting 110 is sleeved on the second tube fitting 120; one end of the second tube fitting 120 is sunk inside the first tube fitting 110 to form an installation cavity 111 defined by the end surface of the second tube fitting 120 and the inner wall of the first tube fitting 110; the first connecting member 130 is partially disposed in the installation cavity 111 and is sealedly connected to the second tube fitting 120; the flow channel 131 is connected to the second tube fitting 120 to form an infusion channel; the other end of the second tube fitting 120 partially extends out of the first tube fitting 110 to form a first installation gap 112 defined by the outer wall of the first tube fitting 110 and the inner wall of the first tube fitting 110; the second connecting member 140 is partially disposed in the first installation gap 112 and is sealedly connected to the second tube fitting 120.

[0069] In a specific embodiment, the second connecting member 140 is a locking ring, and the locking ring and the second pipe member 120 are connected by threads in the first installation gap to ensure the overall sealing performance of the handle 100.

[0070] In this embodiment, the handle 100 realizes infusion only through the second tube 120 and the first connecting member 130. The structure is simple and easy to assemble, and the second tube 120 and the first connecting member 130 and the second connecting member 140 are all sealed and connected. The handle 100 has good sealing performance and can avoid the risk of leakage.

[0071] In one embodiment, Figure 6 and Fig. 9 As shown, the first connecting member 130 has a first outer step 132, the inner wall of the second pipe 120 has at least one first annular groove 121, and the first annular groove 121 is provided with a first sealing member 122; the first connecting member 130 is partially inserted into the second pipe 120 and is interference-fitted with the first sealing member 122, and the first outer step 132 abuts against the end face 123 of the liquid inlet end of the second pipe 120. Through the interference fit between the second pipe 120 and the first sealing member 122, combined with the tight abutment between the first outer step and the end face 123 of the liquid inlet end of the second pipe 120, the sealing is high and the risk of liquid leakage is avoided.

[0072] In other embodiments, the first annular groove 121 may also be provided on the outer wall of the first connecting member 130 , or the first connecting member 130 and the inner wall of the second pipe member 120 may both be provided with the first annular groove 121 , which may play the same role.

[0073] In one embodiment, see Figure 6 , Figure 6 The dotted arrow in the figure indicates the flow direction of the liquid in the handle 100. The inner diameter of the inner cavity 124 of the second tube 120 gradually decreases from its liquid inlet end to the liquid outlet end. When the liquid enters the inner cavity 124 through the first connecting member 130, the hydraulic pressure increases due to the decrease in the inner diameter. When the sealing is guaranteed in the aforementioned embodiment, it helps to increase the flushing pressure and improve the flushing effect.

[0074] In a further embodiment, see Figure 6 The inner diameter of the flow channel 131 of the first connecting member 130 gradually decreases from its liquid inlet end to its liquid outlet end. This method can also further increase the flushing pressure.

[0075] In one embodiment, see Figure 6 The middle part of the second tube 120 has an annular avoidance groove 125, which can further reduce the weight of the second tube 120 and reduce the overall mass of the handle 100.

[0076] In one embodiment, see Figure 6 and Fig.10 The second connecting member 140 has an axial channel 141, and at least one second annular groove 142 is arranged in the axial channel 141. A second sealing member 143 is arranged in the second annular groove 142. The second pipe 120 is interference-fitted with the second sealing member 143 in the axial channel 141, wherein the axial channel 141 has a first inner step 144, and the second pipe 120 has a second outer step 124, and the first inner step 144 abuts against the second outer step 124; the interference fit of the second sealing member 143 combined with the tightness of the step surface can increase the sealing performance.

[0077] In other embodiments, the second annular groove 142 and the first inner step 144 are disposed adjacent to or communicated with each other, and the interference fit of the second sealing member 143 combined with the abutment of the step surface can increase the sealing performance.

[0078] In other embodiments, the second annular groove 142 may also be provided on the outer wall of the second pipe member 120 , or the second annular groove 142 may be provided on both the inner wall of the axial channel 141 and the outer wall of the second pipe member 120 , which may play the same role.

[0079] In one embodiment, the second tube fitting 120 is arranged through the second connecting member 140, and a second installation gap 145 is formed between the outer wall of the second tube fitting 120 and the inner wall of the second connecting member 140. The second installation gap 145 is used to install the needle. This embodiment can quickly realize the installation and replacement of the needle. The needle can be fixed to the second installation gap 145 by plugging or screwing.

[0080] The embodiments of the utility model are introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the structure and core idea of ​​the utility model. At the same time, for technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

[0081] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of protection of the utility model patent.

[0082] Although embodiments of the utility model have been shown and described, those skilled in the art will appreciate that various changes, modifications, combinations, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the utility model, and that the scope of the utility model is defined by the claims and their equivalents.

Claims

1. An oral medical device, characterized in that: including a handle and a liquid supply device connected to each other; The liquid supply device includes a water channel control structure and at least three liquid storage parts; The liquid storage parts are connected to the handle through the water channel control structure, each of the liquid storage parts stores different liquids, and the water channel control structure can selectively output different liquids to the handle; The liquid storage member includes a first liquid storage member and at least two second liquid storage members, and the second liquid storage members are detachably installed at adjacent positions of the first liquid storage member; The first liquid storage member has at least two grooves, each groove is provided with a pair of elastic arms, and the second liquid storage member is installed on the grooves through the elastic arms; The second liquid storage member comprises a main body, a cover body and a transfer member; the main body and the cover body are detachably and hermetically connected, and the cover body and the transfer member are detachably and hermetically connected; The waterway control structure includes a liquid driving component, a control component and a plurality of liquid delivery pipelines; The first liquid storage member and each of the second liquid storage members are independently connected to the liquid driving member through a liquid infusion pipeline, the liquid infusion pipeline is provided with the control member, and each of the control members independently controls the opening and closing of the corresponding liquid infusion pipeline; The liquid driving member is detachably connected to the handle via a connecting tube.

2. The oral medical device according to claim 1, characterized in that: The handle comprises a tail wire connector and a handle body; One end of the tail line connector is connected to the water channel control structure, and the other end is suitable for being connected to a handle body corresponding to different liquids when conveying different liquids.

3. The oral medical device according to claim 2, characterized in that: The handle body comprises a first connecting piece, and the tail wire connector is sealedly connected to the first connecting piece; Among them, one of the first connecting member and the tail wire connector is provided with a plurality of sockets, and the other is provided with a plurality of pins, a boss is provided between at least two of the pins, and an area between the plurality of sockets is provided with a gap matching the boss, and the sockets, the pins, the bosses and the gaps constitute an anti-foolproof structure.

4. The oral medical device according to any one of claims 1 to 3, characterized in that: The cover body has an axial through hole, the outer wall of the adapter and / or the hole wall of the axial through hole are provided with at least one third annular groove, a third sealing member is provided in the third annular groove, and the adapter is interference fit with the third sealing member in the axial through hole.

5. The oral medical device according to claim 3, characterized in that: The handle further comprises a first tube, a second tube and a second connecting member, wherein the first connecting member has a flow channel; The first pipe is sleeved on the second pipe; One end of the second pipe is sunk inside the first pipe to form a mounting cavity defined by the end surface of the second pipe and the inner wall of the first pipe; the first connector is partially disposed in the mounting cavity and sealedly connected to the second pipe; the flow channel is connected to the second pipe to form a liquid infusion channel; The other end of the second pipe partially extends out of the first pipe to form a first installation gap defined by the outer wall of the first pipe and the inner wall of the first pipe. The second connecting member is partially arranged in the first installation gap and sealedly connected to the second pipe.

6. The oral medical device according to claim 5, characterized in that: The first connecting member has a first outer step, the inner wall of the second pipe member and / or the outer wall of the first connecting member has at least one first annular groove, and a first sealing member is arranged in the first annular groove; the first connecting member is partially inserted into the second pipe member and has an interference fit with the first sealing member, and the first outer step abuts against the end face of the liquid inlet end of the second pipe member.

7. The oral medical device according to claim 5, characterized in that: The inner diameter of the inner cavity of the second tube gradually decreases from the liquid inlet end to the liquid outlet end; and / or The inner diameter of the flow channel of the first connecting member gradually decreases from the liquid inlet end to the liquid outlet end.

8. The oral medical device according to claim 5, characterized in that: The second connecting member has an axial channel, at least one second annular groove is provided in the axial channel or on the outer wall of the second pipe, a second sealing member is provided in the second annular groove, and the second pipe is interference-fitted with the second sealing member in the axial channel; wherein, The axial channel has a first inner step, the second pipe has a second outer step, and the first inner step abuts against the second outer step; and / or The second tube is disposed through the second connecting member, and a second installation gap is formed between the outer wall of the second tube and the inner wall of the second connecting member, and the second installation gap is used for installing a needle.

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