Oral local anesthesia injection device

Abstract

The invention provides an oral local anesthesia injection device, and belongs to the field of injection. Comprising an upper tooth socket and a lower tooth socket, auxiliary injection devices are installed on the upper tooth socket and the lower tooth socket, and the auxiliary injection devices are used for assisting medical staff to inject oral local anesthesia; the auxiliary injection device comprises fixing blocks, the fixing blocks are fixedly arranged on the outer side walls of the upper tooth socket and the lower tooth socket, sliding grooves are formed in the inner walls of the fixing blocks, a sliding block is slidably arranged on the inner wall of one sliding groove, a supporting frame is fixedly arranged on the side, away from the fixing blocks, of the sliding block, and a rotating shaft is rotationally arranged on the inner wall of the supporting frame. A fixed ring is fixedly arranged on the inner wall of the support frame; a rotating ring is fixedly arranged on the outer side wall of the rotating shaft; through the arrangement of the auxiliary injection device and the cooperation of a clamping piece and a second spring, after an injector is clamped in, an anti-skid piece is tightly attached to the outer wall of the injector, the clamping piece made of an elastic material can wrap the injector in a self-adaptive mode, the stability during holding is enhanced, and injection deviation caused by hand shaking of medical staff is reduced.

Description

Technical Field

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

[0002] The internal structure of the oral cavity is complex, and precise positioning of different anesthetic sites is required to ensure the anesthetic effect. Traditional injection devices lack effective positioning assistance tools, and doctors mainly rely on experience and feel to operate. In the narrow oral cavity space, it is very difficult to accurately find the best injection position. Secondly, the tension and struggle of patients, as well as the complex anatomical structure in the oral cavity, will increase the difficulty of doctors' operations and affect the stability of injection. Doctors need to constantly pay attention to the reactions of patients during operation, and at the same time keep their hands stable and precisely control the injection depth and angle, which pose huge challenges to doctors' technical level and psychological quality. If mistakes occur during the operation, such as too deep or too shallow injection, angle deviation, etc. Therefore, this application provides an oral local anesthesia injection device to meet the needs. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an oral local anesthesia injection device to solve the problems of complex oral structure, lack of positioning assistance tools, increased positioning difficulty and affected injection stability when doctors operate based on experience in a narrow space due to patient tension, struggle and anatomical structure.

[0004] To solve the above technical problems, the present invention provides the following technical solutions:

[0005] An oral local anesthesia injection device, comprising an upper dental brace and a lower dental brace, wherein an auxiliary injection device is installed on the upper dental brace and the lower dental brace, and the auxiliary injection device is used to assist medical staff in performing oral local anesthesia injection;

[0006] The auxiliary injection device includes a fixed block, the fixed block is fixedly arranged on the outer side walls of the upper dental brace and the lower dental brace, a sliding groove is formed in the inner wall of the fixed block, a slider is slidably arranged in the inner wall of one of the sliding grooves, a support frame is fixedly arranged on the side of the slider away from the fixed block, a rotating shaft is rotatably arranged in the inner wall of the support frame, a fixed ring is fixedly arranged in the inner wall of the support frame, a rotating ring is fixedly arranged on the outer side wall of the rotating shaft, a plurality of limiting grooves are formed in the side of the fixed ring close to the rotating ring, a plurality of first sliding grooves are formed in the side of the rotating ring close to the fixed ring, a first spring is fixedly arranged in the inner wall of the first sliding groove, a limiting block is fixedly arranged at one end of the first spring, the limiting block slides with the inner wall of the first sliding groove, and the limiting block is clamped with the limiting groove;

[0007] A rotating part is also fixedly arranged on the rotating shaft. A clamping part is slidably arranged on the inner wall of the rotating part. A second sliding groove is formed in the inner wall of the rotating part. A second spring is fixedly arranged on the inner wall of the second sliding groove. The second spring is fixed to the clamping part. A syringe is slidably arranged on the inner wall of the clamping part. The syringe is used for injecting anesthesia into the oral cavity.

[0008] Preferably, an adaptation structure is installed on the inner walls of the upper dental appliance and the lower dental appliance. The adaptation structure is used for adapting and fixing according to the sizes of teeth of different people. The adaptation structure includes a third sliding groove which is formed in the inner walls of the upper dental appliance and the lower dental appliance. A third spring is fixedly arranged on the inner wall of the third sliding groove. One end of the third spring is fixedly provided with a convex block which slides on the inner wall of the third sliding groove. An elastic sheet is fixedly arranged on the outer side wall of the convex block.

[0009] Preferably, an adjusting structure is installed between the upper dental appliance and the lower dental appliance. The adjusting structure includes a fixed cylinder which is fixedly arranged on one side where the upper dental appliance and the lower dental appliance are close to each other. A spherical ball is inserted into the fixed cylinder. A pin is rotatably arranged on the outer side wall of the spherical ball through a bearing. A sleeve is rotatably arranged on the pin. A sliding rod is slidably sleeved on the inner wall of the sleeve. External threads are formed on both sliding rods. A hollow rod is slidably arranged on the outer side wall of the sliding rod. Internal threads are formed on the inner walls at both ends of the hollow rod. The outer side wall of the sliding rod slides with the inner wall of the hollow rod. The external threads on the sliding rod are threadedly connected with the internal threads on the inner wall of the hollow rod.

[0010] Preferably, a cleaning structure is installed on the inner walls of the upper dental appliance and the lower dental appliance. The cleaning structure facilitates the cleaning of the inner walls of the upper dental appliance and the lower dental appliance. The cleaning structure includes a cavity which is formed in the inner walls of the upper dental appliance and the lower dental appliance. An inlet is formed on one side where the upper dental appliance and the lower dental appliance are close to each other. The inlet is communicated with the cavity. A plurality of first through holes are formed in the inner walls of the upper dental appliance and the lower dental appliance. The first through holes are communicated with the third sliding groove and the cavity. A plurality of second through holes are formed in the inner walls of the upper dental appliance and the lower dental appliance. The second through holes are communicated with the cavity.

[0011] Preferably, a plurality of grooves are formed in the inner wall of the fixed block. A protrusion is fixedly arranged at the bottom of the slider. The protrusion is inserted into the groove.

[0012] Preferably, a plurality of anti-slip sheets are fixedly arranged on one side of the clamping part close to the syringe. The anti-slip sheets are attached to the outer side wall of the syringe.

[0013] Preferably, the directions of the internal threads are opposite. The internal thread at one end of the hollow rod close to the lower dental appliance is right-handed, and the internal thread at one end of the hollow rod close to the upper dental appliance is left-handed.

[0014] Preferably, the second through holes are gradually inclined from the side close to the cavity towards the side of the inner walls of the upper dental appliance and the lower dental appliance.

[0015] Preferably, a plurality of anti-slip grooves are equidistantly formed on the outer side wall of the hollow rod.

[0016] Preferably, an angle scale mark is provided at one end of the rotating member away from the rotating shaft, and the angle scale mark corresponds to the axis of the rotating shaft.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] In the above solution, through the setting of the auxiliary injection device, through the cooperation of the clamping member and the second spring, when the syringe is inserted, the anti-slip piece closely fits its outer wall, and the elastic clamping member can adaptively wrap the syringe, enhancing the stability during holding and reducing the injection deviation caused by the shaking of the medical staff's hand.

[0019] After the rotating member adjusts the injection angle, the interaction between the limiting block and the limiting groove can form a reliable limit on the rotating member. When the rotating shaft rotates, the limiting block compresses the first spring and disengages from the original limiting groove, and enters the adjacent limiting groove after rotation, and the first spring resets and clamps tightly, effectively preventing the adjusted angle from shifting due to hand shaking.

[0020] During the sliding process of the slider, the protrusion can be inserted and matched with the groove. When the slider slides to a suitable position, the elastic protrusion snaps into the groove, forming an effective limit on the slider, effectively resisting the external force interference generated by the patient's upper and lower jaw movements, preventing the slider from accidentally sliding, and further improving the stability of the syringe.

[0021] Through the setting of the adaptation structure, the fitting state can be automatically adjusted according to the size and shape of the patient's teeth. Whether the patient's teeth are arranged neatly or not, and regardless of the size of the tooth body, it can closely fit the tooth surface, avoiding displacement or shaking caused by the gap between the dental appliance and the teeth.

[0022] The elastic sheet can buffer under slight external force. When the tooth presses the convex block, the compression and recovery deformation process of the third spring can relieve the direct pressure, avoiding hard extrusion or abrasion of the teeth and gums, and reducing the discomfort and potential injury risk of the patient during the operation.

[0023] There is no need to manually adjust the size of the dental appliance. The medical staff only needs to place the upper and lower dental appliances in place, and the automatic adaptation mechanism of the convex block and the spring can quickly complete the fitting, saving operation time.

[0024] Through the setting of the adjustment structure, by rotating the hollow rod clockwise and counterclockwise, the telescopic distance of the sliding rod can be controlled, thereby linearly adjusting the opening degree of the patient's oral cavity to meet the space requirements for different injection operations.

[0025] Without relying solely on the patient's independent opening and closing of the mouth, the doctor can actively open or close the mouth through a mechanical structure, reducing the dependence on the patient's cooperation, especially suitable for patients with weak cooperation ability (such as children, unconscious patients);

[0026] Avoid the patient's oral muscles from being over-fatigued due to long-term independent mouth opening, reduce the muscle soreness, and improve the comfort during the operation;

[0027] The locking mechanism of the screw drive can maintain a fixed state after opening the mouth, preventing the patient's mouth from suddenly closing due to muscle fatigue or unconscious reaction, and avoiding the injection instrument from accidentally injuring the oral mucosa or teeth;

[0028] Through the setting of the cleaning structure, the disinfectant flows precisely into the third sliding groove through the first through-hole, solving the problem of incomplete disinfection that may exist due to structural problems in this part. After the disinfectant flows out from the second through-hole along the cavity, it can evenly cover the inner walls of the upper and lower dental braces, realizing the comprehensive disinfection of the inner surface of the dental braces. Description of the Drawings

[0029] Figure 1 It is a three-dimensional structure schematic diagram of an oral local anesthetic injection device;

[0030] Figure 2 It is a schematic diagram of the convex block and the second through-hole of the oral local anesthetic injection device;

[0031] Figure 3 It is a schematic diagram of the lower pressing sleeve, fixed block and sliding groove of the oral local anesthetic injection device;

[0032] Figure 4 It is a schematic diagram of the syringe, rotating part and clamping part of the oral local anesthetic injection device;

[0033] Figure 5 It is a schematic diagram of the clamping part, anti-slip sheet and second spring of the oral local anesthetic injection device;

[0034] Figure 6 It is a schematic diagram of the rotating part, rotating shaft and slider of the oral local anesthetic injection device;

[0035] Figure 7 For the oral local anesthetic injection device Figure 6 Enlarged view at A in;

[0036] Figure 8 It is an exploded view of the adjustment structure of the oral local anesthetic injection device;

[0037] Figure 9 It is a schematic diagram of the cleaning structure of the oral local anesthetic injection device.

[0038] In the figure: 1. Upper dental appliance; 2. Lower dental appliance; 3. Auxiliary injection device; 301. Fixed block; 302. Sliding groove; 303. Slide block; 304. Support frame; 305. Rotating shaft; 306. Fixed ring; 307. Rotating ring; 308. Limiting groove; 309. First chute; 310. First spring; 311. Limiting block; 312. Rotating member; 313. Clamping member; 314. Second chute; 315. Second spring; 316. Syringe; 4. Adaptation structure; 401. Third chute; 402. Third spring; 403. Protrusion; 404. Elastic sheet; 5. Adjustment structure; 501. Fixed cylinder; 502. Sphere; 503. Axle pin; 504. Sleeve; 505. Slide bar; 506. External thread; 507. Hollow rod; 508. Internal thread; 6. Cleaning structure; 601. Cavity; 602. Inlet; 603. First through hole; 604. Second through hole; 701. Groove; 702. Protrusion; 8. Anti-slip sheet.

[0039] 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. However, this is only for illustrative 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, and such adjustments or modifications are still included within the scope of the appended claims. Detailed implementation mode

[0040] The following describes in detail an oral local anesthetic injection device 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.

[0041] As Figures 1-9 shown, an embodiment of the present invention provides an oral local anesthetic injection device, including an upper dental appliance 1 and a lower dental appliance 2. An auxiliary injection device 3 is installed on the upper dental appliance 1 and the lower dental appliance 2. The auxiliary injection device 3 is used to assist medical staff in injecting local anesthetic in the oral cavity.

[0042] Specifically, the auxiliary injection device 3 includes a fixed block 301. The fixed block 301 is fixedly arranged on the outer side walls of the upper dental appliance 1 and the lower dental appliance 2. A sliding groove 302 is formed in its inner wall. A slide block 303 is slidably arranged on the inner wall of one of the sliding grooves 302. A support frame 304 is fixedly connected to the side of the slide block 303 away from the fixed block 301. By sliding the slide block 303 in the sliding groove 302, the position of the support frame 304 can be adjusted to meet different injection requirements.

[0043] A rotating shaft 305 is rotatably arranged on the inner wall of the support frame 304, and at the same time, a fixing ring 306 is fixedly arranged. A rotating ring 307 is fixedly connected to the outer side wall of the rotating shaft 305. A plurality of limiting grooves 308 are formed on one side of the fixing ring 306 close to the rotating ring 307. A plurality of first sliding grooves 309 are formed on one side of the rotating ring 307 close to the fixing ring 306. A first spring 310 is fixedly connected to the inner wall of the first sliding groove 309. One end of the first spring 310 is fixedly connected to a limiting block 311. The limiting block 311 is slidably connected to the inner wall of the first sliding groove 309 and can be clamped with the limiting groove 308. When it is necessary to adjust the injection angle of the syringe 316, the rotating ring 307 is rotated, and the limiting block 311 pops out of the original limiting groove 308 under the action of the first spring 310. After rotating to a suitable angle, the limiting block 311 is pushed by the first spring 310 and clamped into a new limiting groove 308, realizing precise fixation of the angle.

[0044] A rotating member 312 is also fixedly connected to the rotating shaft 305. A clamping member 313 is slidably arranged on the inner wall of the rotating member 312. A second sliding groove 314 is formed on the inner wall of the rotating member 312. A second spring 315 is fixedly connected to the inner wall of the second sliding groove 314. The second spring 315 is fixedly connected to the clamping member 313. A syringe 316 is slidably arranged on the inner wall of the clamping member 313 for anesthetic injection into the oral cavity. Under the action of the second spring 315, the clamping member 313 can stably clamp syringes 316 of different specifications, ensuring that the syringe 316 does not shake during the injection process. In addition, a plurality of anti-slip sheets 8 are fixedly arranged on one side of the clamping member 313 close to the syringe 316. The anti-slip sheets 8 are attached to the outer side wall of the syringe 316, further enhancing the fixing effect on the syringe 316.

[0045] Furthermore, an adaptation structure 4 is installed on the inner walls of the upper dental appliance 1 and the lower dental appliance 2. The adaptation structure 4 is used for adaptive fixation according to the sizes of teeth of different people. The adaptation structure 4 includes a third sliding groove 401, which is formed on the inner walls of the upper dental appliance 1 and the lower dental appliance 2. A third spring 402 is fixedly connected to the inner wall of the third sliding groove 401. One end of the third spring 402 is fixedly connected to a convex block 403. The convex block 403 is slidably connected to the inner wall of the third sliding groove 401. An elastic sheet 404 is fixedly connected to the outer side wall of the convex block 403. When the device is worn in the patient's oral cavity, the teeth will squeeze the elastic sheet 404, causing the convex block 403 to slide in the third sliding groove 401 and compress the third spring 402. The elastic sheet 404 can closely fit the tooth surface, thereby realizing adaptive fixation of teeth of different sizes and improving the comfort and stability of wearing.

[0046] Furthermore, an adjustment structure 5 is installed between the upper dental appliance 1 and the lower dental appliance 2. The adjustment structure 5 includes a fixed cylinder 501 which is fixedly arranged on the side of the upper dental appliance 1 and the lower dental appliance 2 close to each other. A spherical ball 502 is inserted into the fixed cylinder 501. A pin 503 is rotatably arranged on the outer side wall of the spherical ball 502 through a bearing. A sleeve 504 is rotatably arranged on the pin 503. A slide bar 505 is slidably sleeved on the inner wall of the sleeve 504. External threads 506 are provided on both slide bars 505. A hollow rod 507 is slidably arranged on the outer side wall of the slide bar 505. Internal threads 508 are provided on the inner walls at both ends of the hollow rod 507, and the helix directions of the internal threads 508 are opposite (the internal thread 508 at the end of the hollow rod 507 close to the lower dental appliance 2 is right-handed, and the internal thread 508 at the end of the hollow rod 507 close to the upper dental appliance 1 is left-handed). The outer side wall of the slide bar 505 is slidably connected to the inner wall of the hollow rod 507, and the external thread 506 on the slide bar 505 is threadedly connected to the internal thread 508 on the inner wall of the hollow rod 507. By rotating the hollow rod 507, since the helix directions of the internal threads 508 are opposite, the two slide bars 505 will move inwards or outwards simultaneously, thereby realizing flexible adjustment of the distance between the upper and lower dental appliances 2 to adapt to the oral opening degree of different patients. In addition, a number of anti-slip grooves 701 are equidistantly arranged on the outer side wall of the hollow rod 507, which is convenient for medical staff to apply force to rotate.

[0047] Next, a cleaning structure 6 is installed on the inner walls of the upper dental appliance 1 and the lower dental appliance 2. The cleaning structure facilitates the cleaning of the inner walls of the upper dental appliance 1 and the lower dental appliance 2. The cleaning structure includes a cavity 601 which is opened on the inner walls of the upper dental appliance 1 and the lower dental appliance 2. An inlet 602 is opened on the side of the upper dental appliance 1 and the lower dental appliance 2 close to each other, and the inlet 602 is communicated with the cavity 601. A number of first through holes 603 are opened on the inner walls of the upper dental appliance 1 and the lower dental appliance 2, and the first through holes 603 are communicated with the third chute 401 and the cavity 601; a number of second through holes 604 are opened, and the second through holes 604 are communicated with the cavity 601, and the second through holes 604 are gradually inclined from the side close to the cavity towards the side of the inner walls of the upper dental appliance 1 and the lower dental appliance 2. During cleaning, the cleaning liquid is injected into the cavity 601 from the inlet 602. The third chute 401 and the adapter structure 4 can be cleaned through the first through holes 603. Through the inclined second through holes 604, the cleaning liquid can be sprayed onto the inner wall surface of the dental appliance at a certain angle, improving the cleaning effect, ensuring the cleanliness of the inner wall of the dental appliance, and reducing the growth of bacteria.

[0048] The inner wall of the fixed block 301 is provided with a plurality of grooves 701, and a protrusion 702 is fixedly arranged at the bottom of the slider 303. The protrusion 702 is inserted into the groove 701. The protrusion 702 is made of a medical-grade silicone elastic material. During the sliding process of the slider 303, the protrusion 702 can be inserted into the groove 701 to achieve an insertion fit. When the slider 303 slides to a proper position, the elastic protrusion 702 is snapped into the groove 701 to effectively limit the slider 303, effectively resisting the external force interference generated by the patient's upper and lower jaw movements, preventing the slider 303 from accidentally sliding, ensuring the stable position of the auxiliary injection device 3, and providing a reliable support for the anesthesia injection operation.

[0049] The operation steps of the present invention are specifically as follows:

[0050] When medical staff need to perform an injection operation through the oral cavity, first put the upper dental appliance 1 and the lower dental appliance 2 on the patient. After the dental appliances are in place, the convex blocks 403 inside them come into contact with the patient's teeth. The teeth squeeze the convex blocks 403 so that they retract into the inner wall of the third chute 401, and at the same time compress the third spring 402. After the teeth squeeze the convex blocks 403 until they are completely retracted into the inner wall, the third spring 402 resumes its deformation and pushes the convex blocks 403 to fit the tooth surface again. Since the elastic pieces 404 on the surface of the convex blocks 403 are made of a medical-grade polycarbonate elastic material, they have a certain deformation ability, combining rigidity and a certain toughness. They can not only support the elastic pieces 404 but also buffer under slight external forces, reducing the hard extrusion on the teeth. They can not only closely fit the tooth shapes of different patients but also reduce the extrusion force on the teeth, enabling the upper and lower dental appliances 2 to automatically adapt to the patient's tooth sizes, effectively improving the fit between the dental appliances and the teeth.

[0051] When it is necessary to make the patient's oral cavity open wide and prevent the patient's oral cavity from suddenly shrinking during continuous opening, first thread the two sliding rods 505 onto the inner wall of the hollow rod 507 through the external threads 506 and the internal threads 508. Then, ask the patient to cooperate with the opening and closing of the oral cavity. First, insert one of the sliding rods 505 into the sleeve 504 on the upper dental appliance 1, and then insert the other sliding rod 505 into the sleeve 504 on the lower dental appliance 2. After the insertion is completed, insert the two sleeves 504 into the inner wall of the fixed cylinder 501 in sequence. When it is necessary to open the patient's oral cavity wide to prevent sudden shrinking, the hollow rod 507 can be rotated. When the hollow rod 507 is rotated clockwise, the left-end external thread 506 (right-handed) moves to the right along the internal thread 508, and the right-end external thread 506 (left-handed) moves to the left along the internal thread 508. The two sliding rods at both ends extend outward simultaneously and squeeze the upper dental appliance 1 and the lower dental appliance 2, so as to expand the patient's upper and lower teeth, thereby realizing the expansion of the patient's oral cavity and facilitating injection. When rotated counterclockwise, the two sliding rods retract into the hollow rod 507, thereby realizing the shrinking of the patient's oral cavity, so that it does not completely rely on the patient's own opening and closing of the oral cavity, and because the external thread 506 and the internal thread 508 are locked and clamped during expansion or contraction, the situation of muscle soreness in the oral cavity caused by the patient's own opening and resulting in shrinking will not occur.

[0052] When it is necessary to keep the patient's oral cavity open and prevent involuntary closure, the operation steps are as follows: First, symmetrically install the two sliding rods 505 on the inner wall of the hollow rod 507 through the cooperation of the external thread 506 and the internal thread 508. Then, guide the patient to cooperate with the opening and closing of the oral cavity. Insert one of the sliding rods 505 into the sleeve 504 of the upper dental appliance 1, and the other into the sleeve 504 of the lower dental appliance 2. After completion, insert the two sleeves 504 into the inner wall of the fixed cylinder 501 in sequence. When it is necessary to open the oral cavity, rotate the hollow rod 507 clockwise. At this time, the left-end right-handed external thread 506 moves to the right along the internal thread 508, and the right-end left-handed external thread 506 moves to the left along the internal thread 508, driving the two sliding rods 505 at both ends to extend outward synchronously. By squeezing the upper and lower dental appliances 2, the patient's upper and lower jaws are opened, providing sufficient space for injection operations; when rotated counterclockwise, the sliding rods 505 contract into the hollow rod 507, realizing the closure of the oral cavity. Through the threaded transmission locking mechanism, the involuntary closure of the oral cavity caused by muscle fatigue when simply relying on the patient's independent opening and closing is avoided, effectively maintaining the open and closed state of the oral cavity required for the operation.

[0053] When medical staff need to inject the upper or lower gums of a patient, the operation process is as follows: If an injection into the upper gum is required, first slide the slider 303 along the sliding groove 302 of the lower dental appliance 2 and adjust it to the appropriate position according to the actual injection site. Then, place the syringe 316 between the two clamping members 313. When the syringe 316 presses the clamping members 313, the clamping members 313 slide to both sides under the pressure, compressing the second spring 315. After the syringe 316 is completely clamped, the second spring 315 resets and pushes the clamping members 313, making the anti-slip piece 8 closely fit the outer wall of the syringe 316. Since the clamping members 313 are made of elastic material, they can adaptively wrap the syringe 316, and cooperate with the anti-slip piece 8 to enhance the holding stability, effectively avoiding injection deviation caused by hand shaking. If an injection into the lower gum is required, just switch the operating component to the upper dental appliance 1, and its working principle is the same as above.

[0054] When medical staff need to adjust the injection angle, it can be achieved by rotating the rotating member 312. The rotating member 312 drives the rotating shaft 305 to rotate synchronously, and then drives the rotating ring 307 to rotate. During the rotation, the limiting block 311 on the rotating ring 307 interacts with the limiting groove 308 on the inner wall of the fixed ring 306: Since the limiting groove 308 is designed with an open mouth, when the rotating shaft 305 rotates, the limiting block 311 disengages from the limiting groove 308 and retracts into the first sliding groove 309 under the extrusion of the inner wall of the fixed ring 306, compressing the first spring 310. As the rotating ring 307 continues to rotate, the limiting block 311 slides out of the current limiting groove 308 and enters the adjacent limiting groove 308. At this time, the first spring 310 resets and pushes the limiting block 311 to snap into the new groove to complete the positioning, which can form a reliable limit on the rotating member 312 after each rotation, effectively preventing the angle deviation caused by hand shaking of medical staff after adjusting the injection angle and ensuring the accuracy of the injection operation.

[0055] When cleaning and disinfecting the upper dental appliance 1 and the lower dental appliance 2, first disassemble the adjusting structure 5, and then use the syringe 316 to inject the disinfectant into the inlet 602. Since the cavity 601 is inclined, the injected disinfectant can flow naturally under the action of gravity and precisely flow into the third sliding groove 401 through the first through hole 603, eliminating the disinfection dead angle at this part. Then, the disinfectant continues to flow out of the cavity 601 through the second through hole 604, evenly covering the inner walls of the upper and lower dental appliances 2 to achieve comprehensive disinfection. When used in conjunction with an ultrasonic cleaning machine, the cleaning structure 6 and the high-frequency vibration act synergistically, which can further deeply clean the inside of the dental appliance and make the disinfection effect more thorough.

[0056] This invention covers any substitutions, modifications, equivalent methods and solutions made on the essence and scope of this invention. In order to enable the public to have a thorough understanding of this invention, specific details are described in detail in the above preferred embodiments of this invention, and those skilled in the art can fully understand this invention without the description of these details.

[0057] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An oral local anesthetic injection device, characterized in that It includes an upper dental appliance (1) and a lower dental appliance (2), and an auxiliary injection device (3) is installed on the upper dental appliance (1) and the lower dental appliance (2). The auxiliary injection device (3) is used to assist medical staff in injecting local anesthesia into the oral cavity; The auxiliary injection device (3) includes a fixed block (301). The fixed block (301) is fixedly arranged on the outer side walls of the upper dental appliance (1) and the lower dental appliance (2). A sliding groove (302) is formed in the inner wall of the fixed block (301). A slider (303) is slidably arranged in the inner wall of one of the sliding grooves (302). A support frame (304) is fixedly arranged on the side of the slider (303) away from the fixed block (301). A rotating shaft (305) is rotatably arranged in the inner wall of the support frame (304). A fixed ring (306) is fixedly arranged in the inner wall of the support frame (304). A rotating ring (307) is fixedly arranged on the outer side wall of the rotating shaft (305). A plurality of limiting grooves (308) are formed in the side of the fixed ring (306) close to the rotating ring (307). A plurality of first sliding grooves (309) are formed in the side of the rotating ring (307) close to the fixed ring (306). A first spring (310) is fixedly arranged in the inner wall of the first sliding groove (309). One end of the first spring (310) is fixedly arranged with a limiting block (311). The limiting block (311) slides with the inner wall of the first sliding groove (309), and the limiting block (311) is clamped with the limiting groove (308); A rotating member (312) is also fixedly arranged on the rotating shaft (305). A clamping member (313) is slidably arranged in the inner wall of the rotating member (312). A second sliding groove (314) is formed in the inner wall of the rotating member (312). A second spring (315) is fixedly arranged in the inner wall of the second sliding groove (314). The second spring (315) is fixed to the clamping member (313). A syringe (316) is slidably arranged in the inner wall of the clamping member (313). The syringe (316) is used to inject anesthesia into the oral cavity.

2. The oral local anesthetic injection device according to claim 1, wherein An adaptation structure (4) is installed on the inner walls of the upper dental appliance (1) and the lower dental appliance (2). The adaptation structure (4) is used to adapt and fix according to the tooth sizes of different people. The adaptation structure (4) includes a third sliding groove (401). The third sliding groove (401) is formed in the inner walls of the upper dental appliance (1) and the lower dental appliance (2). A third spring (402) is fixedly arranged in the inner wall of the third sliding groove (401). One end of the third spring (402) is fixedly arranged with a convex block (403). The convex block (403) slides with the inner wall of the third sliding groove (401). An elastic sheet (404) is fixedly arranged on the outer side wall of the convex block (403).

3. The oral local anesthetic injection device according to claim 1, characterized in that, An adjustment structure (5) is installed between the upper dental appliance (1) and the lower dental appliance (2). The adjustment structure (5) includes a fixed cylinder (501). The fixed cylinder (501) is fixedly arranged on the side where the upper dental appliance (1) and the lower dental appliance (2) are close to each other. A spherical ball (502) is inserted into the fixed cylinder (501). A shaft pin (503) is rotatably arranged on the outer side wall of the spherical ball (502) through a bearing. A sleeve (504) is rotatably arranged on the shaft pin (503). A slide rod (505) is slidably sleeved on the inner wall of the sleeve (504). External threads (506) are provided on both slide rods (505). A hollow rod (507) is slidably arranged on the outer side wall of the slide rod (505). Internal threads (508) are provided on the inner walls at both ends of the hollow rod (507). The outer side wall of the slide rod (505) slides with the inner wall of the hollow rod (507). The external threads (506) on the slide rod (505) are threadedly connected to the internal threads (508) on the inner wall of the hollow rod (507).

4. The oral local anesthetic injection device according to claim 2, characterized in that, A cleaning structure (6) is installed on the inner walls of the upper dental appliance (1) and the lower dental appliance (2). The cleaning structure facilitates the cleaning of the inner walls of the upper dental appliance (1) and the lower dental appliance (2). The cleaning structure includes a cavity (601). The cavity (601) is opened on the inner walls of the upper dental appliance (1) and the lower dental appliance (2). An inlet (602) is opened on the side where the upper dental appliance (1) and the lower dental appliance (2) are close to each other. The inlet (602) is communicated with the cavity (601). A plurality of first through holes (603) are opened on the inner walls of the upper dental appliance (1) and the lower dental appliance (2). The first through holes (603) are communicated with the third chute (401) and the cavity (601). A plurality of second through holes (604) are opened on the inner walls of the upper dental appliance (1) and the lower dental appliance (2). The second through holes (604) are communicated with the cavity (601).

5. The oral local anesthetic injection device according to claim 1, characterized in that, A plurality of grooves (701) are opened on the inner wall of the fixed block (301). A protrusion (702) is fixedly arranged at the bottom of the slider (303). The protrusion (702) is inserted into the groove (701).

6. The oral local anesthetic injection device according to claim 1, wherein A plurality of anti-slip sheets (8) are fixedly arranged on the side of the clamping member (313) close to the syringe (316). The anti-slip sheets (8) are attached to the outer side wall of the syringe (316).

7. The oral local anesthetic injection device according to claim 3, characterized in that The internal threads (508) have opposite helix directions. The internal thread (508) at the end of the hollow rod (507) close to the lower dental appliance (2) is right-handed, and the internal thread (508) at the end of the hollow rod (507) close to the upper dental appliance (1) is left-handed.

8. The oral local anesthetic injection device according to claim 4, characterized in that, The second through holes (604) are gradually inclined from the side close to the cavity towards the side of the inner walls of the upper dental appliance (1) and the lower dental appliance (2).

9. The oral local anesthesia injection device according to claim 3, characterized in that, A plurality of anti-slip grooves (701) are equidistantly opened on the outer side wall of the hollow rod (507).

10. The oral local anesthetic injection device according to claim 1, characterized in that, An angle scale mark is provided at the end of the rotating member (312) away from the rotating shaft (305). The angle scale mark corresponds to the axis of the rotating shaft (305).

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