A local anesthetic injection device for oral treatment

Abstract

The utility model discloses a local anesthetic injection device for oral cavity treatment belongs to medical instrument technical field, include: syringe, storage department and assembly structure. Syringe includes injection cylinder, the outer thread pipe fixed in the right -hand end of injection cylinder, detachably installed in the injection needle of outer thread pipe and detachably installed in the push rod department of injection cylinder left end. The utility model discloses a local anesthetic injection device for oral cavity treatment has the following advantages: this local anesthetic injection device for oral cavity treatment, after putting storage tube into storage cavity, utilize the internal thread in the assembly cylinder and the outer thread thread connection of injection cylinder outer surface, thereby can fix storage tube in storage cavity, avoid its left and right movement, then utilize the nut and screw rod through thread cooperation linkage storage department and push rod department, make it form stable connection, thereby can push or pull injection rod and carry out the operation of liquid injection and back suction.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a local anesthetic injection device for oral treatment. Background Technology

[0002] In dental treatment, local anesthesia injection is a common and crucial procedure, and its precision and ease of operation directly affect the treatment outcome and patient experience.

[0003] Chinese patent announcement number CN208176608U discloses an oral syringe for anesthesiology, comprising a connecting column, symmetrically distributed fixing rings fixedly connected to the side end face of the connecting column, anti-slip rubber pads fixedly connected to the inner side of the fixing rings, a push rod inserted inside the connecting column, a push ring fixedly connected to one end of the push rod, a push plate fixedly connected to the end of the push rod opposite to the push ring, a retaining tube fixedly connected to the end of the connecting column opposite to the push ring, a drug capsule movably installed inside the retaining tube, the drug capsule comprising a drug capsule body, a rubber push column, and a spiral tube, the rubber push column being inserted into the inner side of the drug capsule body, the spiral tube being fixedly connected to one end of the drug capsule body, and a lighting device installed at the end of the retaining tube opposite to the connecting column. This utility model, through its convenient drug installation design, the addition of fixing and lighting devices, provides good fixation, ease of operation, and illumination of the oral cavity.

[0004] However, this device has the following drawbacks in use: it achieves drug delivery through a rigid linkage between a push rod and a push plate, and the rubber push column forms a one-way seal with the drug capsule body, lacking a reverse suction structure, making it impossible to perform the clinically necessary back-suction verification operation. To address these shortcomings, we propose a local anesthesia injection device for oral treatment. Utility Model Content

[0005] The purpose of this invention is to provide a local anesthesia injection device for oral treatment, so as to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the specific technical solution of this utility model is as follows: A local anesthetic injection device for oral treatment, comprising: The syringe includes a syringe barrel, an externally threaded tube fixed to the right end of the syringe barrel, an injection needle detachably mounted to the externally threaded tube, and a plunger detachably mounted to the left end of the syringe barrel. The drug storage unit includes a drug storage tube, a front sealing rubber plug fixed to the right end of the drug storage tube, and a rubber pusher that slides on the inner wall of the drug storage tube. The inner wall of the syringe is provided with a drug storage cavity that is compatible with the drug storage tube. The injection needle includes a threaded cylinder and an injection needle fixed to the right end of the threaded cylinder, and the right end of the external threaded tube has a through hole for the injection needle to pass through. The push rod part includes an assembly cylinder, an internal thread formed on the inner wall of the assembly cylinder, a clearance groove coaxially arranged with the internal thread, a through hole formed on the left end of the assembly cylinder, and an injection rod that slides through the inner wall of the through hole, wherein the outer surface of the injection cylinder is provided with an external thread adapted to the internal thread. The assembly structure includes a nut fixed to the right end of the injection rod and a screw fixed to the left end of the rubber pusher, wherein the screw and the nut are threadedly engaged.

[0007] Preferably, finger stops are symmetrically fixed on the outer surface of the assembly cylinder, and the extending direction of the finger stops is perpendicular to the axis of the injection cylinder.

[0008] Preferably, a finger ring is fixedly provided at the left end of the injection rod.

[0009] Preferably, the left end of the injection needle passes through the threaded cylinder and extends into the through hole of the external threaded tube, and the injection needle is clearance-fitted with the through hole.

[0010] Preferably, the surface of the syringe is provided with an observation port, and the surface of the drug storage tube is provided with graduation markings.

[0011] The local anesthesia injection device for oral treatment of this utility model has the following advantages: This local anesthesia injection device for oral treatment involves placing a drug reservoir tube into the drug reservoir cavity. The internal thread inside the assembly cylinder is then connected to the external thread on the outer surface of the injection cylinder, thus fixing the drug reservoir tube within the drug reservoir cavity and preventing it from moving left or right. A nut and a screw are then used to connect the drug reservoir part and the push rod part through a threaded engagement, forming a stable connection. This allows for injection and aspiration operations when the injection rod is pushed or pulled. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the orthographic section of the present invention; Figure 3 This is a schematic diagram of the front section structure of the injection needle of this utility model; Figure 4 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 5 for Figure 2 Enlarged structural diagram at point B.

[0014] The markings in the diagram are as follows: 10 Injection cylinder, 11 External threaded tube, 20 Drug reservoir tube, 21 Front sealing rubber plug, 22 Rubber push block, 30 Threaded cylinder, 31 Injection needle, 32 Through hole, 40 Assembly cylinder, 41 Injection rod, 42 Finger stop, 43 Finger ring, 50 Nut, 51 Screw. Detailed Implementation

[0015] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0016] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0018] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0019] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0020] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a local anesthesia injection device for oral treatment.

[0021] like Figure 1-4 As shown, this utility model discloses a local anesthesia injection device for oral treatment, comprising: a syringe, a drug reservoir, and an assembly structure.

[0022] The syringe includes a syringe barrel 10, an externally threaded tube 11 fixed to the right end of the syringe barrel 10, an injection needle detachably mounted on the externally threaded tube 11, and a push rod detachably mounted to the left end of the syringe barrel 10.

[0023] The drug storage unit includes a drug storage tube 20, a front sealing rubber plug 21 fixed to the right end of the drug storage tube 20, and a rubber pusher 22 slidably disposed on the inner wall of the drug storage tube 20. The inner wall of the syringe 10 is provided with a drug storage cavity adapted to the drug storage tube 20. An observation port is opened on the surface of the syringe 10. The surface of the drug storage tube 20 is provided with scale markings. The inside of the drug storage tube 20 is filled with anesthetic liquid. The anesthetic liquid inside can be sealed by the rubber pusher 22 and the front sealing rubber plug 21.

[0024] The push rod part includes an assembly cylinder 40, an internal thread on the inner wall of the assembly cylinder 40, a clearance groove coaxial with the internal thread, a through hole on the left end of the assembly cylinder 40, and an injection rod 41 that slides through the inner wall of the through hole. The outer surface of the injection cylinder 10 is provided with an external thread that matches the internal thread. The drug storage tube 20 is placed into the drug storage cavity, and then the internal thread in the assembly cylinder 40 is threadedly connected to the external thread on the outer surface of the injection cylinder 10. At this time, the inner wall of the assembly cylinder 40 will abut against the drug storage tube 20, thereby fixing the drug storage tube 20 in the drug storage cavity and preventing it from moving left and right.

[0025] The assembly structure includes a nut 50 fixed to the right end of the injection rod 41 and a screw 51 fixed to the left end of the rubber push block 22. The screw 51 and the nut 50 are threaded together. The right end of the nut 50 is provided with a threaded guide groove. After the drug storage tube 20 is fixed, the injection rod 41 is rotated. The nut 50 and the screw 51 are linked by the threaded engagement to form a stable connection between the drug storage part and the push rod part.

[0026] The injection needle includes a threaded cylinder 30 and an injection needle 31 fixed to the right end of the threaded cylinder 30. The right end of the external threaded tube 11 has a through hole 32 for the injection needle 31 to pass through. The right opening of the drug storage chamber is connected to the through hole 32. The left end of the injection needle 31 passes through the threaded cylinder 30 and extends into the through hole 32 of the external threaded tube 11. The injection needle 31 and the through hole 32 are in clearance fit. After the drug storage tube 20 is fixed, the threaded cylinder 30 is then threadedly connected to the external threaded tube 11. At this time, one end of the injection needle 31 will be inserted into the front sealing rubber plug 21 along the through hole 32 and enter the drug storage tube 20 to realize the flow of the drug.

[0027] The outer surface of the assembly cylinder 40 is symmetrically fixed with finger stops 42. The extension direction of the finger stops 42 is perpendicular to the axis of the syringe 10. The left end of the injection rod 41 is fixed with a finger ring 43. The user's index and middle fingers hook the finger stops 42 respectively, and the thumb enters the finger ring 43. The user can use the thumb to control the pushing and drawing operation of the injection rod 41.

[0028] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A local anesthetic injection device for oral treatment, characterized in that, include: The syringe includes a syringe barrel (10), an externally threaded tube (11) fixed to the right end of the syringe barrel (10), an injection needle detachably mounted on the externally threaded tube (11), and a push rod detachably mounted on the left end of the syringe barrel (10). The drug storage section includes a drug storage tube (20), a front sealing rubber plug (21) fixed to the right end of the drug storage tube (20), and a rubber pusher (22) slidably disposed on the inner wall of the drug storage tube (20). The inner wall of the syringe (10) is provided with a drug storage cavity that is compatible with the drug storage tube (20). The injection needle includes a threaded cylinder (30) and an injection needle (31) fixed to the right end of the threaded cylinder (30), and the right end of the external threaded tube (11) is provided with a through hole (32) for the injection needle (31) to pass through. The push rod part includes an assembly cylinder (40), an internal thread opened on the inner wall of the assembly cylinder (40), a relief groove coaxially arranged with the internal thread, a through hole opened on the left end of the assembly cylinder (40), and an injection rod (41) slidably passing through the inner wall of the through hole, wherein the outer surface of the injection cylinder (10) is provided with an external thread adapted to the internal thread. The assembly structure includes a nut (50) fixed to the right end of the injection rod (41) and a screw (51) fixed to the left end of the rubber pusher (22), wherein the screw (51) and the nut (50) are threadedly engaged.

2. The local anesthesia injection device for oral treatment according to claim 1, characterized in that: The outer surface of the assembly cylinder (40) is symmetrically provided with finger stops (42), and the extension direction of the finger stops (42) is perpendicular to the axis of the injection cylinder (10).

3. The local anesthesia injection device for oral treatment according to claim 1, characterized in that: A finger ring (43) is fixedly provided on the left end of the injection rod (41).

4. A local anesthesia injection device for oral treatment according to claim 1, characterized in that: The left end of the injection needle (31) passes through the threaded cylinder (30) and extends into the through hole (32) of the external threaded tube (11), and the injection needle (31) and the through hole (32) are in clearance fit.

5. A local anesthesia injection device for oral treatment according to claim 1, characterized in that: The surface of the syringe (10) is provided with an observation port, and the surface of the drug storage tube (20) is provided with scale markings.

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