Injection device for anesthesia

Abstract

The invention provides an injection device for anesthesia, and belongs to the technical field of anesthesia injection. Comprising an upper positioning plate and an injector, a lower positioning plate is clamped to the bottom of the upper positioning plate, and the outer wall of the injector is sleeved with a positioning cylinder; the supporting assembly is used for opening the teeth of a patient and the skin in the oral cavity, and the supporting assembly is connected with the upper positioning plate and the lower positioning plate; and the positioning assembly is used for supporting and positioning the injector and is connected with the positioning cylinder. By arranging the supporting assembly and the positioning assembly, the convenience of anesthesia operation can be effectively improved, the difficulty of mandible block anesthesia operation is reduced, the supporting assembly can assist a patient in fully opening the oral cavity, the view operation space of an operator is enlarged, and the comfort level of the patient is improved; and the positioning assembly can assist an operator in arranging the position and angle of the injector and the convenience of holding the injector by the operator in the injection process, so that the operation pressure of the operator is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of anesthesia injection, and particularly relates to an injection device for anesthesia. Background Art

[0002] Mandibular block anesthesia, also known as inferior alveolar nerve block anesthesia, is a commonly used local anesthesia method, mainly used for anesthetizing the same-side mandibular teeth, periodontal membrane, bone of the body and lower part of the ascending ramus of the mandible, buccal gingiva, mucoperiosteum of the premolars and incisors, lower lip and other regions. The injection point of mandibular block anesthesia is usually located 3-4 mm slightly outside the midpoint of the pterygomandibular fold. When the patient opens the mouth wide, the pterygomandibular fold is located behind the molar and in front of the glossopalatine arch.

[0003] When a doctor performs mandibular block anesthesia, first place the syringe at the contralateral corner of the patient's mouth, that is, between the first and second premolars, at an angle of 45° to the midline, then adjust the height of the injection needle so that the syringe is 1 cm higher than the occlusal plane of the mandible and parallel to it. Finally, push the syringe to insert the needle about 2.5 cm until the needle touches the inferior alveolar nerve groove on the bone surface of the mandible. After slowly aspirating the syringe without blood, slowly inject the anesthetic drug.

[0004] The above injection operation requires the operator to accurately control the angle and position of the syringe. And during the injection process, the operator must always maintain the stability of the syringe to avoid causing discomfort to the patient due to the shaking of the syringe. These rigid requirements increase the difficulty of mandibular block anesthesia operation, making it necessary for the operator to be skilled. Therefore, in order to reduce the difficulty of mandibular block anesthesia injection, improve the comfort of the patient during the injection process and the convenience of the operator, the present invention provides an injection device for anesthesia to meet the needs. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an injection device for anesthesia. By setting a support component and a positioning component, the convenience of anesthesia operation can be effectively improved, and the difficulty of mandibular block anesthesia operation can be reduced. The setting of the support component can assist the patient to fully open the mouth, improve the operator's visual field and operation space, and improve the comfort of the patient. The positioning component can assist the operator to arrange the position and angle of the syringe, as well as the convenience of the operator holding the syringe during the injection process, effectively reducing the operator's operation pressure, improving the efficiency and success rate of mandibular block anesthesia. Through the above settings, the problems of large injection difficulty and low syringe arrangement efficiency during the current mandibular block anesthesia injection can be solved.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: An anesthesia injection device comprises an upper positioning plate and a syringe, wherein a lower positioning plate is clamped on the bottom of the upper positioning plate, and a positioning cylinder is sleeved on the outer wall of the syringe; a support component, which is used to prop open the patient's teeth and the skin in the oral cavity, and is respectively connected to the upper positioning plate and the lower positioning plate; and a positioning component, which is used to support and position the syringe, and is connected to the positioning cylinder.

[0007] Optionally, the support assembly includes an upper side plate fixedly connected to both sides of the bottom of the upper positioning plate, lower side plates are symmetrically installed on both sides of the lower positioning plate, and a support frame is fixedly connected to the outer wall of the lower positioning plate.

[0008] Optionally, the upper positioning plate and the lower positioning plate are both rectangular structures, the upper side plate and the lower side plate are respectively mounted on the two shorter rectangular sides of the upper positioning plate and the lower positioning plate, a plurality of baffles distributed in a linear array are fixedly connected to the inner wall of the upper side plate, a plug plate matching the contour of the baffle is fixedly connected to the top of the lower side plate, a recessed portion is installed at the connecting position of the plug plate and the lower side plate, and the recessed portion has an inwardly recessed arc-shaped contour.

[0009] Optionally, covering plates are fixedly connected to the two longer rectangular sides of the upper positioning plate and the lower positioning plate, the support frame is fixed to the lower positioning plate through the covering plates, and the covering plates are perpendicular to the upper positioning plate and the lower positioning plate.

[0010] Optionally, a first arc-shaped plate is fixedly connected to the top and bottom of the support frame, a second arc-shaped plate is fixedly connected to the middle of the support frame, and a hook plate is fixedly connected to one end of the second arc-shaped plate away from the support frame.

[0011] Optionally, the first arc-shaped plate has an outwardly inclined arc, the second arc-shaped plate has an outwardly protruding arc-shaped profile, and the hook plate is a "U"-shaped profile.

[0012] Optionally, the positioning assembly includes a sleeve fixedly connected to the top and bottom outer walls of the positioning cylinder, a positioning rod inserted in the sleeve, an end of the positioning rod away from the sleeve is fixedly connected to a top plate, the bottom of the top plate is slidably connected to a bottom plate, the contours of the top plate and the bottom plate match, and the size of the bottom plate is smaller than that of the top plate.

[0013] Optionally, a reset rod is symmetrically installed on the top of the bottom plate, a spring is sleeved on the outer wall of the reset rod, one end of the spring is fixedly connected to the top of the bottom plate and the other end abuts against the bottom of the top plate, and a through hole is opened on the top plate that matches the position and size of the reset rod.

[0014] Optionally, a straight plate is fixedly connected to an outer wall on one side of the top plate. The straight plate is perpendicular to the top plate. An inclined plate is fixedly connected to an outer wall on the other side of the top plate. The inclined plate has an outward inclination angle. A limiting plate is fixedly connected to one side of the bottom plate. A limiting groove adapted to the contour of the limiting plate is formed in the inclined plate.

[0015] Optionally, a top rod is fixedly connected to the middle position at the top of the bottom plate. The top of the top rod is a conical structure inclined towards the middle. The top rod passes through the top plate and is inserted into the positioning rod. The size of the top of the positioning rod is smaller than that of the bottom. The size of the bottom of the positioning rod matches the size of the top rod. Segmented grooves are formed at the top and the middle position of the positioning rod.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: In the above solution, by setting the support assembly and the positioning assembly, the convenience of anesthesia operation can be effectively improved, and the difficulty of mandibular block anesthesia operation can be reduced. The setting of the support assembly can assist the patient to fully open the mouth, improve the operation space of the operator's vision, and improve the comfort of the patient. The positioning assembly can assist the operator to arrange the position and angle of the syringe, and the convenience of the operator holding the syringe during the injection process, effectively reducing the operation pressure of the operator and improving the efficiency and success rate of mandibular block anesthesia.

[0017] By arranging a covering plate in the support assembly, the covering plate is perpendicular to the upper positioning plate and the lower positioning plate. When the operator places the upper positioning plate and the lower positioning plate on the tooth surface of the patient, the covering plate will abut against the side of the patient's tooth and block and limit the patient's tooth, thereby improving the structural stability of the upper positioning plate and the lower positioning plate and preventing the two from being displaced and sliding during the support process.

[0018] By arranging an insertion plate and a baffle in the support assembly, since a plurality of baffles are installed on the inner wall of the upper side plate in a linear array distribution, the operator can insert the insertion plate into the baffles at different positions to achieve the effect of adjusting the distance between the upper positioning plate and the lower positioning plate. Such a setting can selectively adjust the distance between the upper positioning plate and the lower positioning plate according to the different oral sizes of different patients, adapt to more patients, and improve the application range of the device.

[0019] By arranging a support frame inside the support component, the first arc-shaped plate can bend the patient's skin outwards, thus ensuring that when the operator performs mandibular block anesthesia injection, the skin at the pterygomandibular fold of the patient will not block the view near the injection point, reducing the time for arranging the position of the syringe, improving the efficiency of the operator's anesthesia injection. The second arc-shaped plate can support the skin inside the patient's oral cavity. Such an arrangement can fully stretch the skin inside the patient's oral cavity, facilitating the operator to observe the position of the pterygomandibular fold from the contralateral corner of the patient's mouth. Thus, on the basis of increasing the operating space, it is more convenient for the operator to arrange the injection position of the syringe, improving the efficiency and convenience of anesthesia injection.

[0020] By arranging a support frame, the first arc-shaped plate can bend the patient's skin outwards, thus ensuring that when the operator performs mandibular block anesthesia injection, the skin at the pterygomandibular fold of the patient will not block the view near the injection point, reducing the time for arranging the position of the syringe, improving the efficiency of the operator's anesthesia injection. The second arc-shaped plate can support the skin inside the patient's oral cavity. Such an arrangement can fully stretch the skin inside the patient's oral cavity, facilitating the operator to observe the position of the pterygomandibular fold from the contralateral corner of the patient's mouth. Thus, on the basis of increasing the operating space, it is more convenient for the operator to arrange the injection position of the syringe, improving the efficiency and convenience of anesthesia injection.

[0021] By arranging a positioning component, the sleeve is sleeved on the outer wall of the positioning rod and can slide and rotate to adjust the height and angle on the outer wall of the positioning rod. Therefore, before anesthesia injection, the operator can adjust the position and angle of the positioning cylinder with the help of the positioning rod, thereby ensuring that the syringe can accurately reach the pterygomandibular fold position of the patient. After arranging the positioning component on the patient's teeth, the fixing effect of the positioning cylinder is achieved by means of the biting force of the patient's teeth. After the positioning cylinder is fixed, it cannot slide or rotate on the positioning rod under the action of friction. At this time, the operator can arrange the syringe with the help of the positioning cylinder, and during the injection process, the operator can hold the syringe with the help of the positioning cylinder, reducing the operator's operating burden and improving the accuracy of the operator's anesthesia injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0023] Figure 1 It is a first perspective three-dimensional structural schematic diagram of the cooperation between an injection device for anesthesia and a dental model; Figure 2 It is a second perspective three-dimensional structural schematic diagram of the cooperation between an injection device for anesthesia and a dental model; Figure 3 Schematic three-dimensional structure diagram of the support component and the dental mold Figure 4 Schematic first-view three-dimensional structure diagram of the support component Figure 5 Schematic second-view three-dimensional structure diagram of the support component Figure 6 Schematic third-view three-dimensional structure diagram of the support component Figure 7 Schematic enlarged three-dimensional structure diagram of the positioning component and the syringe Figure 8 Schematic first-view sectional three-dimensional structure diagram of the positioning component Figure 9 Schematic second-view sectional three-dimensional structure diagram of the positioning component Figure 10 For Figure 9 Enlarged three-dimensional structure diagram of part A in Figure 11 Schematic enlarged three-dimensional structure diagram of the top plate and the bottom plate Figure 12 Schematic enlarged three-dimensional structure diagram of the bottom plate

[0024] Reference numerals: 1. Upper positioning plate; 101. Wrapping plate; 102. Upper side plate; 103. Baffle; 2. Lower positioning plate; 201. Lower side plate; 202. Recessed part; 203. Insertion plate; 3. Support frame; 301. First arc plate; 302. Second arc plate; 303. Hook plate; 4. Top plate; 401. Inclined plate; 402. Straight plate; 403. Limiting groove; 404. Positioning rod; 5. Bottom plate; 501. Reset rod; 502. Jacking rod; 503. Limiting plate; 6. Positioning cylinder; 601. Sleeve; 7. Syringe

[0025] As shown in the figure, in order to clearly show the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic purposes and is not intended to limit the present invention to this specific structure, device and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs Detailed implementation manners

[0026] The following describes in detail an injection device for anesthesia provided by the present invention with reference to the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present invention

[0027] It should be noted that in the specification, references to "one embodiment", "an embodiment", "exemplary embodiments", "some embodiments", etc. indicate that the described embodiments may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Additionally, when a particular feature, structure, or characteristic is described in connection with an embodiment, implementing such feature, structure, or characteristic in connection with other embodiments (whether or not explicitly described) should be within the knowledge of those skilled in the relevant art.

[0028] Generally, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood to not necessarily be intended to convey a set of exclusive factors, but rather, at least in part depending on the context, to allow for the presence of other factors that may not necessarily be explicitly described.

[0029] It can be understood that the meanings of "on", "above", and "over" in the present invention should be construed in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but also can include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0030] Furthermore, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. are used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as shown in the figures. Spatial relative terms are intended to encompass different orientations in the use or operation of the device in addition to the orientation depicted in the figures. The device may be oriented in other ways, and the spatial relative descriptors used herein may be interpreted accordingly.

[0031] Such as Figure 1 and Figure 2As shown, an embodiment of the present invention provides an injection device for anesthesia, including an upper positioning plate 1 and a syringe 7, wherein the bottom of the upper positioning plate 1 is clamped with a lower positioning plate 2, and a positioning cylinder 6 is sleeved on the outer wall of the syringe 7; a support component, the support component is used to prop open the patient's teeth and the skin in the oral cavity, and the support component is respectively connected to the upper positioning plate 1 and the lower positioning plate 2; a positioning component, the positioning component is used to support and position the syringe 7, and the positioning component is connected to the positioning cylinder 6. The injection device provided in the present application is mainly used for mandibular block anesthesia. According to the specific operation process of mandibular block anesthesia, the present application can effectively improve the convenience of anesthesia operation and reduce the difficulty of mandibular block anesthesia operation by setting a support component and a positioning component. The setting of the support component can assist the patient to fully open the oral cavity, increase the operating space of the operator's field of vision, and improve the patient's comfort. The positioning component can assist the operator in arranging the position and angle of the syringe 7, as well as the convenience of the operator holding the syringe 7 during the injection process, effectively reducing the operating pressure of the operator and improving the efficiency and success rate of mandibular block anesthesia.

[0032] As an implementation method in this embodiment, Figures 1 to 6 As shown, the support assembly includes an upper side plate 102 fixedly connected to both sides of the bottom of the upper positioning plate 1, and lower side plates 201 are symmetrically installed on both sides of the lower positioning plate 2. The upper positioning plate 1 and the lower positioning plate 2 are both rectangular structures. The upper side plate 102 and the lower side plate 201 are respectively installed on the two shorter rectangular sides of the upper positioning plate 1 and the lower positioning plate 2. A plurality of baffles 103 distributed in a linear array are fixedly connected to the inner wall of the upper side plate 102, and a baffle 103 that matches the contour of the baffle 103 is fixedly connected to the top of the lower side plate 201. The plug plate 203 is provided with a recessed portion 202 at the connection position between the plug plate 203 and the lower side plate 201. The recessed portion 202 has an arc-shaped profile that is recessed inward. The two longer rectangular sides of the upper positioning plate 1 and the lower positioning plate 2 are fixedly connected with the covering plate 101. The covering plate 101 is perpendicular to the upper positioning plate 1 and the lower positioning plate 2. The support component mainly supports the teeth behind the patient's molars and in front of the lingual palate arch. Therefore, in the actual operation process, the support component needs to be placed behind the patient's molars (such as Figure 1 and Figure 2 as shown).

[0033] The support assembly is mainly composed of an upper positioning plate 1 and a lower positioning plate 2. Both the upper positioning plate 1 and the lower positioning plate 2 are rectangular structures. Among them, the upper positioning plate 1 is used to support the upper teeth of the patient, and the lower positioning plate 2 is used to support the lower teeth of the patient. Since the covering plates 101 are installed on the two longer rectangular sides of the upper positioning plate 1 and the lower positioning plate 2, and the covering plates 101 are perpendicular to them, when the operator places the upper positioning plate 1 and the lower positioning plate 2 on the tooth surface of the patient, the covering plates 101 will abut against the sides of the patient's teeth and block and limit the patient's teeth, thereby improving the structural stability of the upper positioning plate 1 and the lower positioning plate 2 and preventing the two from being misaligned and sliding during the support process.

[0034] Furthermore, since the contour of the insertion plate 203 matches the contour of the baffle plate 103, the user can insert the insertion plate 203 into the baffle plate 103 to achieve the splicing effect of the upper positioning plate 1 and the lower positioning plate 2. After the upper positioning plate 1 and the lower positioning plate 2 are spliced, the two will be limited and fixed to each other. At this time, relying on the support effect of the upper positioning plate 1 and the lower positioning plate 2 on the patient's teeth, it can ensure that the patient's oral cavity is fully opened, and the patient can easily open the mouth with the help of the upper positioning plate 1 and the lower positioning plate 2 without constantly applying force to open the mouth, thereby improving the comfort of the patient's oral cavity and avoiding muscle soreness caused by long-term forced mouth opening; since a plurality of baffle plates 103 are installed on the inner wall of the upper side plate 102 in a linear array, the operator can insert the insertion plate 203 into the baffle plates 103 at different positions to achieve the effect of adjusting the distance between the upper positioning plate 1 and the lower positioning plate 2. Such a setting can selectively adjust the distance between the upper positioning plate 1 and the lower positioning plate 2 according to the different oral cavity sizes of different patients, adapt to more patients, and improve the applicable range of the device.

[0035] Even further, since a recess 202 is installed at the connection position between the insertion plate 203 and the lower side plate 201, and the recess 202 has an inwardly concave arc-shaped contour, the insertion plate 203 and the lower side plate 201 have elasticity under the action of the recess 202. Under the elastic action, the operator can deform the insertion plate 203 by bending it inward to make it concave in the middle position of the lower positioning plate 2. The deformed insertion plate 203 is more likely to be telescoped into the upper side plate 102. Such a setting is to facilitate the operator to insert the insertion plate 203 into the baffle plates 103 at different positions and improve the efficiency of the operator in splicing the upper positioning plate 1 and the lower positioning plate 2. In addition, the baffle plate 103 is fixed above the inner wall of the upper side plate 102. Such a hidden structure setting makes it so that after the upper positioning plate 1 and the lower positioning plate 2 are spliced together, the insertion plate 203 and the baffle plate 103 will not scratch the oral skin of the patient and avoid causing discomfort to the patient.

[0036] In this embodiment, as Figures 1 to 6As shown, a support frame 3 is fixedly connected to the outer wall of the lower positioning plate 2. The support frame 3 is fixed to the lower positioning plate 2 through a covering plate 101. First arc-shaped plates 301 are fixedly connected to both the top and bottom of the support frame 3. A second arc-shaped plate 302 is fixedly connected to the middle position of the support frame 3. One end of the second arc-shaped plate 302 away from the support frame 3 is fixedly connected to a hook plate 303. The first arc-shaped plate 301 has a radially outwardly inclined curvature. The second arc-shaped plate 302 has a radially outwardly convex arc-shaped profile. The hook plate 303 has a "U" - shaped profile. The support frame 3 is a frame structure extending from the covering plate 101 at the bottom of the lower positioning plate 2. When the user places the lower positioning plate 2 at the position of the patient's posterior molar, the support frame 3 is located at the position of the patient's pterygomandibular fold. The reason for installing the support frame 3 at this position is that the injection point of the mandibular block anesthesia is usually located at the pterygomandibular fold. First arc-shaped plates 301 are installed at both ends of the support frame 3. Since the first arc-shaped plate 301 has a radially outwardly inclined curvature, the first arc-shaped plate 301 can pull the patient's skin outward, thus ensuring that when the operator performs mandibular block anesthesia injection, the skin at the position of the patient's pterygomandibular fold does not block the view near the injection point, reducing the time for arranging the position of the syringe 7 and improving the efficiency of the operator's anesthesia injection. In addition, a second arc-shaped plate 302 is installed at the middle position of the support frame 3. One end of the second arc-shaped plate 302 is fixed to the support frame 3, and the other end directly extends out of the outer wall of the patient's lip and is hooked on the patient's lip to form a fixation by means of the "U" - shaped profile of the hook plate 303. Since the second arc-shaped plate 302 has a radially outwardly convex arc-shaped profile, the second arc-shaped plate 302 can support the skin inside the patient's oral cavity. Such a setting can fully stretch the skin inside the patient's oral cavity, facilitating the operator to observe the position of the pterygomandibular fold from the contralateral angle of the patient's mouth. Thus, on the basis of increasing the operating space, it is more convenient for the operator to arrange the injection position of the syringe 7, improving the efficiency and convenience of anesthesia injection.

[0037] As an implementation mode in this embodiment, as Figure 1 、 Figure 2 and Figures 7 to 12As shown, the positioning component includes sleeves 601 fixedly connected to the outer walls of the top and bottom of the positioning cylinder 6. A positioning rod 404 is inserted into the sleeve 601. One end of the positioning rod 404 away from the sleeve 601 is fixedly connected to a top plate 4. A bottom plate 5 is slidably connected to the bottom of the top plate 4. The contours of the top plate 4 and the bottom plate 5 coincide. The size of the bottom plate 5 is smaller than that of the top plate 4. Reset rods 501 are symmetrically installed on the top of the bottom plate 5. Springs are sleeved on the outer walls of the reset rods 501. One end of the spring is fixedly connected to the top of the bottom plate 5 and the other end abuts against the bottom of the top plate 4. Through holes that coincide with the positions and sizes of the reset rods 501 are formed in the top plate 4. A straight plate 402 is fixedly connected to one outer wall of the top plate 4. The straight plate 402 is perpendicular to the top plate 4. An inclined plate 401 is fixedly connected to the other outer wall of the top plate 4. The inclined plate 401 has an outward inclination angle. A limiting plate 503 is fixedly connected to one side of the bottom plate 5. A limiting groove 403 adapted to the contour of the limiting plate 503 is formed in the inclined plate 401. A top rod 502 is fixedly connected to the middle position of the top of the bottom plate 5. The top of the top rod 502 is a tapered structure inclined towards the middle. The top rod 502 passes through the top plate 4 and is inserted into the positioning rod 404. The size of the top of the positioning rod 404 is smaller than that of the bottom. The size of the bottom of the positioning rod 404 coincides with the size of the top rod 502. Segmentation grooves are formed at the top and middle positions of the positioning rod 404. The positioning component is mainly used for positioning and limiting the syringe 7. Therefore, during actual operation, the positioning component needs to be arranged between the patient's first and second premolars (such as Figure 1 and Figure 2 shown).

[0038] The positioning component is mainly composed of three parts: the positioning cylinder 6, the top plate 4, and the bottom plate 5. Among them, the number of the top plate 4 and the bottom plate 5 is two. The two bottom plates 5 and the top plate 4 are respectively located at the top and bottom of the positioning cylinder 6. After the user arranges the positioning component on the patient's teeth, the two bottom plates 5 respectively abut against the top and bottom teeth of the patient. Since the contours of the bottom plate 5 and the top plate 4 are adapted, and a straight plate 402 is fixedly connected to one outer wall of the top plate 4. The straight plate 402 is perpendicular to the top plate 4. An inclined plate 401 is fixedly connected to the other outer wall of the top plate 4. Therefore, plate structures consistent with the contours of the straight plate 402 and the inclined plate 401 are also correspondingly installed on both sides of the bottom plate 5. These two plate structures can perform wrap-around limiting on the patient's first and second premolars, thereby improving the adaptability between the bottom plate 5 and the patient's teeth and preventing the positioning component from sliding and shifting.

[0039] The sleeve 601 is sleeved on the outer wall of the positioning rod 404 and can slide and adjust the height and rotate and adjust the angle on the outer wall of the positioning rod 404. Therefore, before anesthesia injection, the operator can first adjust the position and angle of the positioning cylinder 6 by means of the positioning rod 404, so as to ensure that the syringe 7 can accurately reach the position of the pterygomandibular fold of the patient.

[0040] Furthermore, since two reset rods 501 are symmetrically installed on the top of the bottom plate 5, springs are sleeved on the outer walls of the reset rods 501, and one end of each spring is fixedly connected to the top of the bottom plate 5 while the other end abuts against the bottom of the top plate 4. Through holes that match the positions and sizes of the reset rods 501 are formed in the top plate 4. Such a setting enables the bottom plate 5 to slide on the top plate 4 under the pressing action of an external force, and during the sliding process, the springs are deformed by the force and squeezed together. When the pressing on the bottom plate 5 stops, the bottom plate 5 will automatically reset under the elastic force of the springs; the ejector rod 502 on the bottom plate 5 passes through the top plate 4 and is inserted into the positioning rod 404. Since the size of the bottom of the positioning rod 404 matches the size of the ejector rod 502, and the size of the top of the positioning rod 404 is smaller than that of the bottom, when the bottom plate 5 slides towards the top plate 4, the ejector rod 502 will slide from the bottom of the positioning rod 404 to the bottom of the positioning rod 404. During the sliding process, the conical structure with the top of the ejector rod 502 inclined towards the middle will squeeze the inner wall of the positioning rod 404. Since segmented grooves are formed at the top and the middle position of the positioning rod 404, the top of the positioning rod 404 will be driven to expand outwards under the squeezing action of the ejector rod 502. When the top of the positioning rod 404 expands outwards, it will squeeze the sleeve 601, thereby increasing the frictional force between the positioning rod 404 and the sleeve 601, and further achieving the fixing effect on the sleeve 601 by means of the frictional force. Through the setting of the above structure, the operator can first adjust the height and angle of the positioning cylinder 6, then arrange the positioning assembly on the patient's teeth, and make the bottom plate 5 slide towards the position of the top plate 4 by means of the biting force of the patient's teeth. During the sliding process, the fixing of the positioning cylinder 6 is achieved by means of the cooperation effect of the ejector rod 502 and the positioning rod 404. After the positioning cylinder 6 is fixed, it cannot slide or rotate on the positioning rod 404 under the action of the frictional force. At this time, the operator can arrange the syringe 7 by means of the positioning cylinder 6, and during the injection process, the operator can hold the syringe 7 by means of the positioning cylinder 6, reducing the operation burden of the operator and improving the accuracy of the anesthetic injection by the operator.

[0041] The working principle of the technical solution provided by the present invention is as follows: When in use, first arrange the upper positioning plate 1 and the lower positioning plate 2 at the rear position of the patient's molar teeth. The upper positioning plate 1 is used to support the patient's upper teeth, and the lower positioning plate 2 is used to support the patient's lower teeth. Since the covering plates 101 are installed on the two longer rectangular sides of the upper positioning plate 1 and the lower positioning plate 2, and the covering plates 101 are perpendicular to them, when the operator places the upper positioning plate 1 and the lower positioning plate 2 on the patient's tooth surface, the covering plates 101 will abut against the sides of the patient's teeth and block and limit the patient's teeth, thereby improving the structural stability of the upper positioning plate 1 and the lower positioning plate 2 and preventing the phenomenon of dislocation and sliding during the support process. The user can insert the insertion plate 203 into the baffle 103 to achieve the splicing effect of the upper positioning plate 1 and the lower positioning plate 2. After the upper positioning plate 1 and the lower positioning plate 2 are spliced, they will be limited and fixed to each other. At this time, relying on the supporting effect of the upper positioning plate 1 and the lower positioning plate 2 on the patient's teeth, it can ensure that the patient's oral cavity is fully opened, and the patient can easily open the mouth with the help of the upper positioning plate 1 and the lower positioning plate 2 without constantly applying force to open the mouth, thereby improving the comfort of the patient's oral cavity and avoiding muscle soreness caused by long-term forced mouth opening. Since a plurality of baffles 103 arranged in a linear array are installed on the inner wall of the upper side plate 102, the operator can insert the insertion plate 203 into the baffles 103 at different positions to achieve the effect of adjusting the distance between the upper positioning plate 1 and the lower positioning plate 2. Such a setting can selectively adjust the distance between the upper positioning plate 1 and the lower positioning plate 2 according to the different oral cavity sizes of different patients, adapt to more patients, and improve the applicable range of the device.

[0042] After the upper positioning plate 1 and the lower positioning plate 2 are arranged, the support frame 3 is located at the position of the patient's pterygomandibular fold. Since the first arc plate 301 has an outwardly inclined arc, the first arc plate 301 can pull the patient's skin outward, thus ensuring that when the operator performs an inferior alveolar nerve block anesthesia injection, the skin at the position of the patient's pterygomandibular fold will not block the view near the injection point, reducing the time for arranging the position of the syringe 7 and improving the efficiency of the operator's anesthesia injection. Since the second arc plate 302 has a circular arc contour that protrudes outward, the second arc plate 302 can support the skin inside the patient's oral cavity. Such a setting can fully stretch the skin inside the patient's oral cavity, facilitating the operator to observe the position of the pterygomandibular fold from the opposite corner of the patient's mouth. Thus, on the basis of increasing the operating space, it is more convenient for the operator to arrange the injection position of the syringe 7, improving the efficiency and convenience of the anesthesia injection.

[0043] Before anesthesia injection, the operator first adjusts the position and angle of the positioning cylinder 6 with the help of the positioning rod 404, so as to ensure that the syringe 7 can accurately reach the position of the pterygomandibular fold of the patient. Then, the positioning component is arranged between the first and second premolars of the patient. After the arrangement, the patient's teeth will squeeze the bottom plate 5. During the squeezing process of the bottom plate 5, it will slide towards the top plate 4. During the sliding process, the conical structure with the top of the ejector rod 502 inclined towards the middle will squeeze the inner wall of the positioning rod 404. Since the size of the bottom of the positioning rod 404 matches the size of the ejector rod 502, and the size of the top of the positioning rod 404 is smaller than that of the bottom, and segmented grooves are provided at the top and middle positions of the positioning rod 404, the top of the positioning rod 404 will be driven to expand outwards under the squeezing action of the ejector rod 502. When the top of the positioning rod 404 expands outwards, it will squeeze the sleeve 601, thereby increasing the friction between the positioning rod 404 and the sleeve 601, and then achieving the fixing effect of the sleeve 601 by means of friction. After the positioning cylinder 6 is fixed, it cannot slide or rotate on the positioning rod 404 under the action of friction. At this time, the operator can arrange the syringe 7 with the help of the positioning cylinder 6, and during the injection process, the operator can hold the syringe 7 with the help of the positioning cylinder 6, reducing the operation burden of the operator and improving the accuracy of the operator's anesthesia injection.

[0044] This invention covers any substitutions, modifications, equivalent methods and solutions made on the essence and scope of this invention. For the public to have a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments of this invention. However, those skilled in the art can fully understand this invention without the description of these details. In addition, in order to avoid unnecessary confusion to the essence of this invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0045] The above are only the preferred embodiments of this invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of this invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of this invention.

Claims

1. An anesthesia injection device, comprising an upper positioning plate and a syringe, characterized in that: The bottom of the upper positioning plate is clamped with a lower positioning plate, and the outer wall of the syringe is sleeved with a positioning cylinder; A support assembly, the support assembly is used to prop open the patient's teeth and the skin in the oral cavity, and the support assembly is connected to the upper positioning plate and the lower positioning plate respectively; A positioning assembly is used to support and position the syringe, and the positioning assembly is connected to the positioning cylinder.

2. The anesthesia injection device according to claim 1, characterized in that: The support assembly includes an upper side plate fixedly connected to both sides of the bottom of the upper positioning plate, lower side plates are symmetrically installed on both sides of the lower positioning plate, and a support frame is fixedly connected to the outer wall of the lower positioning plate.

3. The anesthesia injection device according to claim 2, characterized in that: The upper positioning plate and the lower positioning plate are both rectangular structures, the upper side plate and the lower side plate are respectively mounted on the two shorter rectangular sides of the upper positioning plate and the lower positioning plate, a plurality of baffles distributed in a linear array are fixedly connected to the inner wall of the upper side plate, a plug plate matching the contour of the baffle is fixedly connected to the top of the lower side plate, a recessed portion is installed at the connecting position of the plug plate and the lower side plate, and the recessed portion has an inwardly recessed arc-shaped contour.

4. The anesthesia injection device according to claim 2, characterized in that: The two longer rectangular sides of the upper positioning plate and the lower positioning plate are fixedly connected with covering plates, the support frame is fixed to the lower positioning plate through the covering plates, and the covering plates are perpendicular to the upper positioning plate and the lower positioning plate.

5. The anesthesia injection device according to claim 2, characterized in that: The top and bottom of the support frame are both fixedly connected with a first arc plate, the middle position of the support frame is fixedly connected with a second arc plate, and one end of the second arc plate away from the support frame is fixedly connected with a hook plate.

6. The anesthesia injection device according to claim 5, characterized in that: The first arc plate has an outwardly inclined arc, the second arc plate has an outwardly protruding arc profile, and the hook plate has a "U"-shaped profile.

7. The anesthesia injection device according to claim 1, characterized in that: The positioning assembly includes a sleeve fixedly connected to the top and bottom outer walls of the positioning tube, a positioning rod inserted in the sleeve, an end of the positioning rod away from the sleeve is fixedly connected to a top plate, the bottom of the top plate is slidably connected to a bottom plate, the contours of the top plate and the bottom plate match, and the size of the bottom plate is smaller than that of the top plate.

8. The anesthesia injection device according to claim 7, characterized in that: A reset rod is symmetrically installed on the top of the bottom plate, a spring is sleeved on the outer wall of the reset rod, one end of the spring is fixedly connected to the top of the bottom plate and the other end abuts against the bottom of the top plate, and a through hole is opened on the top plate that matches the position and size of the reset rod.

9. The anesthesia injection device according to claim 7, characterized in that: A straight plate is fixedly connected to the outer wall on one side of the top plate, and the straight plate is perpendicular to the top plate. An inclined plate is fixedly connected to the outer wall on the other side of the top plate, and the inclined plate has an outwardly inclined angle. A limiting plate is fixedly connected to one side of the bottom plate, and a limiting groove is provided on the inclined plate that matches the contour of the limiting plate.

10. The anesthesia injection device according to claim 7, characterized in that: A push rod is fixedly connected at the middle position of the top of the base plate. The top of the push rod is a conical structure inclined toward the middle. The push rod passes through the top plate and is inserted into the positioning rod. The size of the top of the positioning rod is smaller than the size of the bottom. The size of the bottom of the positioning rod matches the size of the push rod. Segmented grooves are provided at the top and middle positions of the positioning rod.

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