CN111228611A

CN111228611A - Auxiliary drug delivery device for oral local anesthesia with built-in needle

Info

Publication number: CN111228611A
Application number: CN201811435199.5A
Authority: CN
Inventors: 张春鑫; 孙国辉; 闫维罡
Original assignee: First Affiliated Hospital of Henan University of Science and Technology
Current assignee: First Affiliated Hospital of Henan University of Science and Technology
Priority date: 2018-11-28
Filing date: 2018-11-28
Publication date: 2020-06-05
Anticipated expiration: 2038-11-28
Also published as: CN111228611B

Abstract

The invention relates to an auxiliary administration device for oral local anesthesia with a built-in needle. Comprises a mouth gag, a needle, a control mechanism for controlling the needle to extend out of the mouth gag and an injection mechanism communicated with the needle through a catheter; the needle head is L-shaped and is accommodated in an accommodating cavity arranged in the mouth gag, the needle tip end of the needle head is slidably arranged on the mouth gag in a sliding hole arranged at the top of the accommodating cavity, the base part of the needle head is connected with the catheter, and the mouth gag is provided with a through hole for the catheter to penetrate out of the accommodating cavity to be connected with the injection mechanism. The invention reduces the fear of the needle puncture of the patient on one hand, and can keep the mouth opening state and improve the comfort of the patient in the operation process on the other hand.

Description

Auxiliary drug delivery device for oral local anesthesia with built-in needle

Technical Field

The invention relates to the field of auxiliary equipment for stomatological operations, in particular to an auxiliary administration device for oral local anesthesia with a built-in needle.

Background

Local anesthesia (oral anesthesia), local anesthesia for short, refers to the temporary blocking of sensory conduction of nerve endings and fibers in a certain area of the body by local anesthetic drugs, so that the pain in the area disappears. The special equipment and the participation of anesthesiologists are not needed, the operator can operate independently, special care is not needed after the operation, the safety is relatively high, and the proper amount of vasoconstrictor is added into the local anesthetic, so that the bleeding of the operation area can be reduced, and the operation is convenient. Thus being widely applied to dental and oral and maxillofacial surgery.

The existing oral local anesthesia mode is mostly that the muscle or tissue inside the oral cavity is directly punctured and injected by adopting a common needle tube injector, and the following problems exist:

on one hand, with the development of medical equipment technology, although the needle of the syringe is thinner and thinner, the minimum can reach 0.2mm, and the syringe does not have too strong pain feeling in the actual puncturing and injection process, the puncturing part is a very sensitive oral cavity instead of the hip or other muscle injection parts, so that great visual impact can still be caused to a patient, and fear is generated. Resulting in the reluctance of some patients to visit the clinic in time after the disease. The patient can be more tolerant and dragging more frequently, which can lead to more serious consequences due to missing the optimal treatment opportunity. The fear of needle sticks into the oral cavity is particularly evident for children without self-control. Doctors and guardians often spend a significant amount of time dissuading, educating, and even deceiving children before they are anesthetized. But the function of the injection is very little, and finally the injection is forcedly punctured by pressing the limbs, supporting the head stably, opening the mouth and the like. Not only brings great injury to young children, needs longer time for pacifying, but also hides the expansion of the puncture point caused by the deviation of the puncture point and the needle head or the scratch of other parts in the oral cavity caused by the violent twisting of the head of the children or the opening and closing of the upper jaw and the lower jaw in the injection process, is not beneficial to the operation and the recovery after the operation.

On the other hand, after anesthesia, the mouth of the patient cannot be kept in an open state for a long time, and medical care personnel is required to cooperate with the mouth of the patient to open the mouth of the patient so that medical equipment can act on the surgical site, which wastes a large amount of manpower. When the clamp-shaped mouth gag is used for opening, the position of the mouth gag is fixed after the mouth gag is opened, so that the comfort of a patient is low, and the fatigue damage of the facial musculoskeletal of the patient is easily caused.

Disclosure of Invention

The invention aims to provide an auxiliary drug delivery device for oral local anesthesia with a built-in needle, which can reduce or even eliminate the fear of needle puncture when a patient is anesthetized, and can keep the open state of the mouth and improve the comfort of the patient in the operation process.

In order to solve the technical problems, the invention adopts the technical scheme that: an auxiliary drug delivery device for local anesthesia in oral cavity with a built-in needle comprises an opener for opening the mouth of a patient, a needle arranged in the opener and corresponding to the position of the palate of the patient, a control mechanism for controlling the needle to extend out of the opener to penetrate into the palate of the patient and an injection mechanism communicated with the needle through a catheter; the needle head is L-shaped and is accommodated in an accommodating cavity arranged in the mouth gag, the needle tip end of the needle head is slidably arranged in a sliding hole arranged on the mouth gag and positioned at the top of the accommodating cavity, the base part of the needle head is connected with the catheter, and the mouth gag is provided with a through hole for the catheter to penetrate out of the accommodating cavity to be connected with the injection mechanism; control mechanism is including setting up the first connecting rod that holds the intracavity, second connecting rod and control rod, the one end of first connecting rod is articulated mutually with the inflection point of syringe needle, the other end is articulated mutually with the second connecting rod, the tip that first connecting rod was kept away from to the second connecting rod is articulated bottom the chamber with holding, the one end of control rod is worn to establish through the perforation and is holding the intracavity and articulated the hinge point position of connecting at first connecting rod and second connecting rod, the other end is located and holds the chamber outside, and accessible control rod push-and-pull is located and holds the chamber outside one end and stretch out or retract the slide opening with the needle point end of control syringe needle, still be equipped with the scale mark that supplies to read the needle point end of syringe needle and stretch out length in the slide opening along.

Preferably, a first rotating shaft and a second rotating shaft are respectively fixedly arranged at two ends of the first connecting rod, a first shaft sleeve for the first rotating shaft to be in rotating fit is arranged at the inflection point position of the needle head, and a second shaft sleeve and a third shaft sleeve for the second rotating shaft to be in rotating fit are respectively arranged on the second connecting rod and the operating lever.

Preferably, both ends of the second rotating shaft are arc-shaped, and the inner walls at both sides of the accommodating cavity are respectively provided with a stroke groove for the sliding fit of the end part of the second rotating shaft.

Preferably, the stroke groove is arc-shaped, and takes the hinge point of the second connecting rod and the bottom of the accommodating cavity as the center of a circle and the length of the second connecting rod as the radius.

Preferably, the mouth gag is detachable split type, and the split boundary of mouth gag runs through and holds chamber, slide opening and perforation distribution.

Preferably, the mouth gag comprises a tooth socket capable of being opened and closed, a compression spring for expanding the tooth socket through the elastic force generated by the reset extension, and an adjusting mechanism for adjusting the opening degree of the tooth socket by adjusting the extension amount of the compression spring; the tooth socket comprises an upper tooth hoop and a lower tooth hoop which are arc-shaped and are respectively hinged with the corresponding end parts, the accommodating cavity is formed in the upper tooth hoop, the sliding hole is formed in the upper edge of the upper tooth hoop, and the through hole is formed in the position, opposite to one side of the oral cavity of the patient, of the upper tooth hoop; adjustment mechanism includes that one end slides and sets up the bracing piece on edge under the braces along adjusting lever and the one end slip setting on the braces under of edge under last braces, compression spring sets up between adjusting lever and bracing piece and near the position of facing, the middle part of bracing piece and the one end fixed connection of connecting rod, the other end of connecting rod is connected with the middle part of adjusting lever is articulated, keep away from the position of facing one end at the adjusting lever and seted up threaded hole, adjusting screw is installed in the cooperation in the screw hole, adjusting screw's tip passes and can slide the setting on the bracing piece behind the screw hole.

Preferably, the adjusting rod and the supporting rod are respectively and fixedly provided with a sliding ball at the end part close to the tooth socket, the lower edge of the upper dental collar and the upper edge of the lower dental collar are respectively provided with a sliding groove for the corresponding sliding ball to be installed in a matched manner and to be in sliding fit, and the wrap angle of the sliding groove to the sliding ball is larger than 180 degrees.

Preferably, the adjusting rod and the supporting rod are foldable two segments, and the folding positions of the adjusting rod and the supporting rod are respectively positioned between the compression spring and the corresponding sliding ball.

Preferably, the tooth socket, the compression spring and the adjusting mechanism are all made of stainless steel materials, occlusion strips made of silica gel materials are respectively arranged on the upper edge of the upper dental hoop and the lower edge of the lower dental hoop, and occlusion grooves for occlusion of teeth are respectively formed in the occlusion strips; the occlusion strip corresponding to the upper dental band is provided with a communicating hole which is communicated with the sliding hole and used for the needle tip of the needle head to extend out of the occlusion strip.

Preferably, go up the dental articulator and be split type with lower dental articulator, and go up the dental articulator and can dismantle the connection through locating pin locating hole structure between the components of a whole that can function independently terminal surface of dental articulator down.

Advantageous effects

The mouth gag comprises the mouth gag and the hidden needle which is arranged in the mouth gag, so that a patient can wear the mouth gag and open the mouth of the patient through the mouth gag in the oral cavity examination process before operation, and then the needle can extend out of the mouth gag and puncture the oral cavity to complete anesthetic injection. Because the needle head can not be seen by the patient in the whole course, the psychological fear effect is greatly reduced, and the problem that the puncture point is enlarged or other oral tissues are scratched due to violent shaking of the head of the child in the injection process can be particularly avoided. Even if the patient shakes head due to pain in the injection process, the needle head is arranged on the mouth gag, and the opening stretches the oral cavity of the patient and fixes the relative position, so that the condition that the oral cavity of the patient is accidentally injured due to the relative movement between the needle head and the patient in the injection process of holding the injector by a medical worker in the prior art can be avoided.

In the application, the self-behavior adult patient can be informed to inject the anesthetic at any time in the examination process; for children or other patients without purple fog behavior ability, the guardian can be clearly informed that the needle is hidden in the mouth gag and the injection is completed in the process of oral examination. Can be operated after being confirmed by the patient or the guardian, thereby avoiding the suspicion that deception that the patient is deceived to have a social public place is generated.

The hole digger supports the tooth socket to open through the elastic force generated by the reset extension of the compression spring, then the tooth socket drives the oral cavity of a patient to open, and the opening of the oral cavity is in a dynamic balance state under the action of the elastic force of the spring. Under the state that the oral cavity is opened, the patient can still slightly close the mouth by overcoming the elasticity of the compression spring so as to obtain intermittent rest, so that the bone and the muscle of the jaw can be relaxed, and the comfort level of the patient is improved. The mouth gag is also provided with an adjusting mechanism for adjusting the extension amount of the compression spring, so that the balance between proper opening size and pain reduction of patients can be achieved according to the oral cavity conditions of different patients.

Drawings

FIG. 1 is a schematic view of the split end view of the present invention;

FIG. 2 is a partial schematic view of the containment chamber portion of the present invention with the needle extended from the mouth gag;

FIG. 3 is a partial schematic view of the containment chamber portion of the present invention with the needle retracted into the mouth gag;

FIG. 4 is a schematic line drawing of the mouth gag of the present invention in the folded state of the adjustment mechanism;

the labels in the figure are: 1. facing 101, meshing groove 102, meshing strip 103, upper facing band 104, sliding groove 105, lower facing band 2, compression spring 3, support bar 301, second support sub-bar 302, fourth rotating shaft 303, fourth sleeve 304, first support sub-bar 305, connecting bar 306, circular arc groove 4, adjusting screw 5, adjusting bar 501, threaded hole 502, first adjusting sub-bar 503, fifth sleeve 504, fifth rotating shaft 505, second adjusting sub-bar 6, sliding ball 7, conduit 8, accommodating cavity 9, control mechanism 901, sliding hole 902, first rotating shaft 903, first connecting bar 904, second rotating shaft 905, second connecting bar 906, stroke groove 907, operating lever 908, perforation 10, needle 11, communicating hole.

Detailed Description

As shown in figures 1 to 3, the oral local anesthesia auxiliary drug delivery device with built-in needle of the invention comprises an opener for opening the mouth of a patient, a needle 10 arranged in the opener and corresponding to the position of the palate of the patient, a control mechanism 9 for controlling the needle 10 to extend out of the opener to penetrate the palate of the patient and an injection mechanism communicated with the needle 10 through a catheter 7. Can put into patient's oral cavity inside with the mouth gag when carrying out oral cavity routine examination, strut patient's oral cavity through the cooperation with patient's upper and lower tooth to make mouth gag and patient's oral cavity relatively fixed, difficult production relative motion. After the mouth is opened, the control mechanism 9 controls the needle 10 to extend out of the mouth opener and penetrate into the mouth of a patient at any time, and injection is carried out through the injection mechanism and the catheter 7. The injection mechanism may be a concealed syringe or a precision injection pump syringe, but care should be taken to vent the air from the needle 10 and catheter 7 prior to injection.

As shown in fig. 2 and 3, the needle 10 of the present invention is L-shaped and is accommodated in the accommodating chamber 8 opened in the mouth gag. The needle 10 includes a vertically disposed needle tip and a horizontally disposed base, and the needle tip and the base are internally communicated with each other. The needle tip is slidably arranged in a sliding hole 901 which is arranged on the mouth gag and positioned at the top of the containing cavity 8, slides upwards to extend out of the mouth gag, and slides downwards to retract into the containing cavity 8 of the mouth gag. The base of the needle 10 is connected to the injection mechanism via a catheter 7, and the mouth gag is provided with perforations 908 for the catheter 7 to pass out of the receiving chamber 8 for connection to the injection mechanism, the perforations 908 being distributed on the mouth gag on the side facing away from the patient's mouth.

The control mechanism 9 includes a first link 903, a second link 905, and an operating lever 907 disposed in the accommodating chamber 8. The first connecting rod 903 is provided with a first rotating shaft 902 at the upper end and a second rotating shaft 904 at the lower end. First hub 902 is rotatably engaged with the first hub at the inflection point on needle 10. The second rotating shaft 904 is rotatably matched with a second shaft sleeve arranged at the upper end of the second connecting rod 905, and the end part of the second rotating shaft 904 far away from the second shaft sleeve is rotatably arranged at the bottom of the accommodating cavity 8. The right end of the control rod 907 penetrates through the accommodating cavity 8 through the through hole 908 and is provided with a third shaft sleeve matched with the second rotating shaft 904, and the left end is located outside the accommodating cavity 8. As shown in FIG. 3, the first link 903 and the second link 905 are in a folded state, and then the left end of the operating rod 907 is pushed to move to the right, so as to drive the first link 903 and the second link 905 to be opened to the state shown in FIG. 2, and further drive the needle tip to extend out of the mouth gag to penetrate into the oral cavity of the patient for drug injection. After the injection is finished, the left end of the operating rod 907 is pulled to move to the right to drive the first connecting rod 903 and the second connecting rod 905 to be folded to the state shown in fig. 3, and then the needle tip is driven to retract into the mouth gag. Aiming at the condition that the thickness of the muscle tissue in the oral cavity of patients of different ages is not easy, the operating rod 907 is further provided with scale marks along the length direction thereof for reading the length of the needle tip of the needle head 10 extending out of the sliding hole 901 so as to be referenced by medical staff in the injection process.

In this embodiment, both ends of the second rotating shaft 904 are arc-shaped, and the inner walls of both sides of the accommodating cavity 8 are respectively provided with a stroke slot 906 for the sliding fit of the end of the second rotating shaft 904. The stroke slot 906 is arc-shaped, and takes the hinge point of the second link 905 and the bottom of the accommodating chamber 8 as the center of circle and the length of the second link 905 as the radius. The structure can ensure that the second rotating shaft 904 accurately advances along the stroke slot 906 in the process of pushing and pulling the operating rod 907, avoids the phenomenon of dead locking of each hinged part, and also ensures that the vertical direction reflected by the scale mark is more accurate. Meanwhile, the two ends of the stroke slot 906 are closed, and the effect of limiting the movement limit position of the needle tip is achieved through limiting the displacement of the second rotating shaft 904, so that the situation that the needle head 10 completely slides out of the slide hole 901 due to the fact that the second rotating shaft 904 moves leftwards excessively is avoided, or the situation that the needle tip is partially pulled out under the condition that the needle tip penetrates into the oral cavity of a patient and injection is not started due to the fact that the second rotating shaft 904 moves rightwards excessively is avoided.

The mouth gag in this embodiment is detachable and split, and the split boundary of the mouth gag penetrates through the accommodating cavity 8, the sliding hole 901 and the through hole 908 to be distributed. The needle 10 and the first hub fixed to the inflection point of the needle 10 can be conveniently removed by detaching the mouth gag after one operation is completed. A new needle 10 is fitted onto first shaft 902 before the next operation, and the mouth gag is reassembled. Thereby achieving the purposes of reducing cost and recycling. In order to adapt to different anesthesia positions of the oral cavity of a patient, a plurality of the invention can be provided, and the positions of the accommodating cavities 8 of the invention are different. In a more preferred embodiment, a plurality of receiving chambers 8 are provided in the mouth gag, control means 9 are provided in each of the receiving chambers 8, and after confirming the injection position in the oral cavity of the patient, a needle 10 is fitted into the corresponding receiving chamber 8.

As shown in fig. 1, the mouth gag of the present invention mainly comprises a mouthpiece 1, a compression spring 2 and an adjustment mechanism. The mouthpiece 1 includes upper braces 103 and lower braces 105 which may be supported on the upper and lower rows of teeth, respectively. The accommodating cavity 8 is formed on the upper dental brace 103, the sliding hole 901 is formed on the upper edge of the upper dental brace 103, and the through hole 908 is formed on the upper dental brace 103 at the left side in fig. 1, i.e., the side opposite to the oral cavity of the patient. The adjusting mechanism is connected to the tooth socket 1, the compression spring 2 is arranged on the adjusting mechanism, the upper dental brace 103 and the lower dental brace 105 are stretched by elastic potential energy generated by the resetting and extending trend of the compression spring 2, so that the oral cavity of a patient is stretched, the relative position of the mouth gag and the oral cavity of the patient is fixed, and anesthesia injection and an operation after injection are performed. The adjusting mechanism is used for adjusting the maximum elongation of the compression spring 2, which is helpful for expanding the oral cavity of a patient to a proper size and enabling the patient to obtain rest by slightly closing the oral cavity and overcoming the elasticity of the compression spring 2.

The upper braces 103 and the lower braces 105 are both arc-shaped and are adapted to the arrangement rule of teeth, and the ends of the upper braces 103 and the lower braces 105 which are positioned in the same direction are hinged and connected through a rotatable hinge respectively, so that the upper braces 103 and the lower braces 105 can rotate relatively by taking the hinge as the center, and the purpose that the tooth socket 1 can be opened and closed is achieved. The tooth socket 1 is made of stainless steel or titanium alloy materials, so that the tooth socket is convenient to clean and disinfect. In order to improve the comfort of the teeth of the patient, occlusion strips 102 made of silica gel materials are respectively arranged on the upper edge of the upper braces 103 and the lower edge of the lower braces 105, and occlusion grooves 101 for occlusion of the teeth are respectively formed in the occlusion strips 102, so that hard damage to the teeth in the process of opening the dental brace 1 is avoided. Aiming at the puncture injection of the upper jaw part of a patient, a communicating hole 11 which is communicated with the sliding hole 901 and is used for leading the needle tip of the needle head 10 to extend out of the occlusal strip 102 is arranged on the occlusal strip 102 corresponding to the upper dental brace 103, and the communicating hole 11 is arranged on one side of the occlusal strip 102 which is positioned at the corresponding occlusal groove 101 and faces the oral cavity of the patient.

In order to meet the detachable and split requirements of the mouth gag in the embodiment, the upper dental hoop 103 and the lower dental hoop 105 are both split, and the split end faces of the upper dental hoop 103 and the lower dental hoop 105 are detachably connected through a positioning pin positioning hole structure. In fig. 1, the split end faces of the upper dental brace 103 and the lower dental brace 105 and the positioning holes distributed on the end faces are shown, and the positioning pins are correspondingly distributed on the end face of the other part of the mouth gag which is not shown in fig. 1. Because the two parts of the mouth gag are not stressed in the transverse direction in the using process, the positioning pin and the positioning hole are not excessively fixedly connected, and only the positioning hole is provided with the silica gel and is in slight interference fit with the positioning pin so as to avoid the loosening of the positioning pin.

The adjusting mechanism and the compression spring 2 are made of stainless steel materials. The adjusting mechanism comprises an adjusting rod 5 and a supporting rod 3 which are distributed in the same vertical plane, and the adjusting rod 5 and the supporting rod 3 are distributed at intervals up and down. As shown in fig. 1, a slide ball 6 is fixedly provided at the right end of the adjusting rod 5 and the right end of the support rod 3, respectively, and a slide groove 104 is provided at the lower edge of the upper dental brace 103 and the upper edge of the lower dental brace 105 along the arc length direction of the upper dental brace 103 or the lower dental brace 105, respectively. The two sliding balls 6 are slidably and rotatably disposed in the corresponding sliding grooves 104, so that the integral adjusting mechanism composed of the adjusting rod 5 and the supporting rod 3 can slide along the arc length direction of the mouthpiece 1 and can rotate relative to the mouthpiece 1. The initial position of the adjusting mechanism can be determined according to the oral cavity conditions of different patients, so that the interference between the medical equipment and the adjusting mechanism can be avoided to the maximum extent. The wrap angle of the sliding groove 104 to the sliding ball 6 is greater than 180 degrees, preferably 210 degrees and 260 degrees, which can not only prevent the adjusting mechanism from falling off from the tooth socket 1, but also ensure that the rotation of the adjusting mechanism is not hindered.

The compression spring 2 is arranged between the adjusting rod 5 and the supporting rod 3 and is close to the position of the tooth socket 1 (namely the position of the right end of the adjusting mechanism in figure 1), and the adjusting rod 5 and the right end of the supporting rod 3 are expanded through the compressed elastic potential energy to open the tooth socket 1. Spring seat rods are respectively and vertically fixedly arranged on the adjusting rod 5 and the supporting rod 3, and two ends of the compression spring 2 are respectively sleeved in the corresponding spring seat rods and are fixed with the corresponding spring seat rods, so that the compression spring 2 is prevented from collapsing out. The left position of the middle part of the support rod 3 is vertically and fixedly connected with the lower end of the connecting rod 305 in an integrated forming or welding mode. The upper end of the connecting rod 305 is hinged to the left of the middle of the adjusting rod 5, so that the adjusting rod 5 can rotate around the upper end of the connecting rod 305, and the extension of the compression spring 2 can be adjusted by changing the distance between the left ends of the adjusting rod 5 and the supporting rod 3. A threaded hole 501 is formed in the position, far away from one end of the tooth socket 1, of the adjusting rod 5, an adjusting screw 4 with an upward large end is installed in the threaded hole 501 in a matched mode, the small end of the adjusting screw 4 is in an arc shape, and the adjusting screw can be slidably arranged in an arc-shaped groove 306 distributed at the left end of the supporting rod 3 after penetrating through the threaded hole 501. Through the structure, the adjusting screw 4 is screwed upwards, the distance between the adjusting rod 5 and the left end of the supporting rod 3 is reduced, the ultimate elongation of the compression spring 2 is increased, and the opening degree of the tooth socket 1 is synchronously increased; the adjusting screw 4 is screwed downwards, the distance between the adjusting rod 5 and the left end of the supporting rod 3 is increased, the ultimate elongation of the compression spring 2 is reduced, and the opening degree of the tooth socket 1 is synchronously reduced. Thereby being convenient for medical personnel to adjust according to the specific conditions of different patients' oral cavity conditions.

Through the cooperation of the sliding ball 6 and the sliding groove 104, the rotation of the supporting rod 3 of the adjusting rod 5 relative to the tooth socket 1 can be realized, and the interference of an adjusting mechanism to medical equipment in the operation or correction process is reduced. In order to further reduce the possibility of interference of the adjusting mechanism on medical equipment, the adjusting mechanism in the invention is two-section and foldable, the left section of the adjusting mechanism positioned in the drawing 1 can be directly folded towards the opposite direction of an operation or correction part and is attached to the face of a patient, and the specific structure is as follows:

the supporting rod 3 comprises a first supporting sub-rod 304 provided with a connecting rod 305 and a second supporting sub-rod 301 connected with a sliding ball 6, the second supporting sub-rod 301 is in a hockey stick shape, the right end of the second supporting sub-rod slightly upwards tilts and is connected with the sliding ball 6, the left end of the second supporting sub-rod is vertically provided with a fourth rotating shaft 302, a fourth shaft sleeve 303 which is matched with the fourth rotating shaft 302 in a rotating mode is arranged on the first supporting sub-rod 304, and the first supporting sub-rod 304 can rotate horizontally by taking the fourth rotating shaft 302 as the center. The adjusting rod 5 comprises a first adjusting sub-rod 502 provided with a threaded hole 501 and a second adjusting sub-rod 505 connected with a sliding ball 6, the second adjusting sub-rod 505 is shaped like a hockey stick, the right end of the second adjusting sub-rod slightly tilts downwards and is connected with the sliding ball 6, the left end of the second adjusting sub-rod is vertically provided with a fifth rotating shaft 504, the first adjusting sub-rod 502 is provided with a fifth shaft sleeve 503 for the fifth rotating shaft 504 to rotatably fit, and the second adjusting sub-rod 505 can horizontally rotate by taking the fifth rotating shaft 504 as the center.

As shown in fig. 4, when the operation or correction site is located on the left side of the oral cavity, the adjustment mechanism is located entirely on the right side of the mouthpiece 1. After the compression spring 2 is adjusted to a suitable extension amount, the adjustment mechanism is pulled so that the entire adjustment mechanism including the first support sub-rod 304 and the second adjustment sub-rod 505 is rotated to the right side and is attached to the cheek region of the patient. When the operation or correction position is at the right side of the oral cavity, the avoidance measures are reversely taken. In this embodiment, the sliding groove 104 is provided with silica gel for increasing the sliding resistance of the sliding ball 6, the fourth shaft sleeve 303 is provided with silica gel for increasing the rotation resistance of the fourth rotating shaft 302, and the fifth shaft sleeve 503 is provided with silica gel for increasing the rotation resistance of the fifth rotating shaft 504. The silica gel on the first supporting sub-rod 304 and the second adjusting sub-rod 505 is thicker, so that the silica gel can deform under the action of external force to smoothly rotate, and meanwhile, the sliding ball 6 can be prevented from sliding and the adjusting mechanism can be prevented from rotating too flexibly, so that the whole structure is in a more stable state after the positioning.

Claims

1. The utility model provides a supplementary device of dosing of built-in oral cavity local anesthesia of syringe needle which characterized in that: comprises a mouth gag used for propping open the mouth of a patient, a needle (10) arranged in the mouth gag and corresponding to the position of the palate of the patient, a control mechanism (9) used for controlling the needle (10) to extend out of the mouth gag to penetrate into the palate of the patient and an injection mechanism communicated with the needle (10) through a catheter (7); the needle head (10) is L-shaped and is accommodated in an accommodating cavity (8) arranged in the mouth gag, the needle tip end of the needle head (10) is slidably arranged in a sliding hole (901) arranged on the mouth gag and positioned at the top of the accommodating cavity (8), the base part of the needle head (10) is connected with the catheter (7), and a perforation (908) for the catheter (7) to penetrate out of the accommodating cavity (8) and be connected with the injection mechanism is arranged on the mouth gag; the control mechanism (9) comprises a first connecting rod (903), a second connecting rod (905) and an operating rod (907) which are arranged in the accommodating cavity (8), one end of the first connecting rod (903) is hinged with the inflection point of the needle (10), the other end of the first connecting rod is hinged with the second connecting rod (905), the end part, far away from the first connecting rod (903), of the second connecting rod (905) is hinged with the bottom of the accommodating cavity (8), one end of the operating rod (907) penetrates through the accommodating cavity (8) through a through hole (908) and is hinged to the hinged point position of the first connecting rod (903) and the second connecting rod (905), and the other end of the operating rod is positioned outside the accommodating cavity (8), and can control the needle tip of the needle head (10) to extend out of or retract into the sliding hole (901) through one end of the push-pull operating rod (907) positioned outside the accommodating cavity (8), the operating rod (907) is also provided with scale marks along the length direction thereof for reading the length of the needle tip of the needle head (10) extending out of the slide hole (901).

2. The device for assisting in the local anesthesia of the oral cavity with the built-in needle as claimed in claim 1, wherein: two ends of the first connecting rod (903) are respectively fixedly provided with a first rotating shaft (902) and a second rotating shaft (904), a first shaft sleeve for the first rotating shaft (902) to be in running fit is arranged at the inflection point position of the needle head (10), and a second shaft sleeve and a third shaft sleeve for the second rotating shaft (904) to be in running fit are respectively arranged on the second connecting rod (905) and the operating lever (907).

3. The device for assisting in the local anesthesia of the oral cavity with the built-in needle as claimed in claim 2, wherein: both ends of the second rotating shaft (904) are arc-shaped, and the inner walls of both sides of the accommodating cavity (8) are respectively provided with a stroke groove (906) for the sliding fit of the end part of the second rotating shaft (904).

4. The device for assisting in the local anesthesia of the oral cavity and comprising a needle as claimed in claim 3, wherein: the stroke groove (906) is arc-shaped, and takes a hinge point of the second connecting rod (905) and the bottom of the accommodating cavity (8) as a circle center and the length of the second connecting rod (905) as a radius.

5. The device for assisting in the local anesthesia of the oral cavity with the built-in needle as claimed in claim 1, wherein: the mouth gag is detachable and split, and the split boundary of the mouth gag penetrates through the containing cavity (8), the sliding hole (901) and the through hole (908) to be distributed.

6. The device for assisting in the local anesthesia of the oral cavity and comprising a needle as claimed in claim 5, wherein: the mouth gag comprises a tooth socket (1) which can be opened and closed, a compression spring (2) which is used for expanding the tooth socket (1) through the elastic force generated by resetting and extending, and an adjusting mechanism which is used for adjusting the opening degree of the tooth socket (1) through adjusting the extending amount of the compression spring (2); the tooth socket (1) comprises an upper tooth hoop (103) and a lower tooth hoop (105) which are arc-shaped and are respectively hinged with corresponding end parts, an accommodating cavity (8) is formed in the upper tooth hoop (103), a sliding hole (901) is formed in the upper edge of the upper tooth hoop (103), and a through hole (908) is formed in the position, back to one side of the oral cavity of a patient, of the upper tooth hoop (103); adjustment mechanism includes that one end slides and sets up adjusting lever (5) and one end on edge under last braces (103) and slides and set up bracing piece (3) on edge under braces (105), compression spring (2) set up between adjusting lever (5) and bracing piece (3) and be close to the position of facing (1), the middle part of bracing piece (3) and the one end fixed connection of connecting rod (305), the other end of connecting rod (305) is connected with the middle part of adjusting lever (5) is articulated, facing (1) one end was kept away from in adjusting lever (5) position seted up screw hole (501), adjusting screw (4) are installed in the cooperation in screw hole (501), the tip of adjusting screw (4) passes behind screw hole (501) slidable and sets up on bracing piece (3).

7. The device for assisting in the local anesthesia of the oral cavity and comprising a needle as claimed in claim 6, wherein: the end parts of the adjusting rod (5) and the support rod (3) close to the tooth socket (1) are respectively and fixedly provided with a sliding ball (506), the lower edge of the upper dental brace (103) and the upper edge of the lower dental brace (105) are respectively provided with a sliding groove (104) which is matched, installed and matched with the corresponding sliding ball (506) in a sliding way, and the wrap angle of the sliding groove (104) to the sliding ball (506) is larger than 180 degrees.

8. The device for assisting in the local anesthesia of the oral cavity and comprising a needle as claimed in claim 7, wherein: the adjusting rod (5) and the supporting rod (3) are both foldable two segments, and the folding positions of the adjusting rod (5) and the supporting rod (3) are respectively positioned between the compression spring (2) and the corresponding sliding ball (506).

9. The device for assisting in the local anesthesia of the oral cavity and comprising a needle as claimed in claim 6, wherein: the tooth socket (1), the compression spring (2) and the adjusting mechanism are all made of stainless steel materials, occlusion strips (102) made of silica gel materials are respectively arranged on the upper edge of the upper dental hoop (103) and the lower edge of the lower dental hoop (105), and occlusion grooves (2) for occlusion of teeth are respectively formed in the occlusion strips (102); a communicating hole (11) which is communicated with the sliding hole (901) and is used for the needle tip of the needle head (10) to extend out of the bite strip (102) is arranged on the bite strip (102) corresponding to the upper tooth hoop (103).

10. The device for assisting in the local anesthesia of the oral cavity and comprising a needle as claimed in claim 6, wherein: go up dental floss (103) and dental floss (105) down and be split type, and go up the dental floss (103) and go up the detachable connection through locating pin locating hole structure between the components of a whole that can function independently terminal surface of dental floss (105) down.