CN113509623B - Synchronous propelling device for local anesthesia - Google Patents
Synchronous propelling device for local anesthesia Download PDFInfo
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- CN113509623B CN113509623B CN202110782515.1A CN202110782515A CN113509623B CN 113509623 B CN113509623 B CN 113509623B CN 202110782515 A CN202110782515 A CN 202110782515A CN 113509623 B CN113509623 B CN 113509623B
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- guide rail
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- brake
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M19/00—Local anaesthesia; Hypothermia
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M5/2066—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically comprising means for injection of two or more media, e.g. by mixing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M2005/2026—Semi-automatic, e.g. user activated piston is assisted by additional source of energy
Abstract
The invention discloses a synchronous propelling device for local anesthesia, which belongs to the field of medical instruments and is characterized in that: comprises a guide rail and a propeller; the guide rail is of a hollow structure, a needle head is arranged in the guide rail, and the needle head is connected with a first syringe through a hose; the guide rail is provided with a structure fixed on the human body; the guide rail is connected with the propeller through two brake lines; the propeller comprises a shell, wherein the shell internally comprises a first brake cable pushing assembly and a second brake cable pushing assembly. Compared with the prior art, the artificial hand feeling error during local anesthesia injection is avoided, the uniform distance propulsion and the dislocation chance are less, the infiltration anesthesia is propelled, and the whole injection is painless.
Description
Technical Field
The invention relates to an anesthesia apparatus, in particular to a synchronous propelling device for local anesthesia.
Background
Local anesthesia, broadly, means that local anesthetic is applied to a body part to temporarily block the sensory nerve conduction function of a certain part of the body, and the motor nerve conduction is kept intact or simultaneously blocked to varying degrees. The narrow meaning specifically refers to local infiltration anesthesia, and the specific operation is that an intradermal injection needle is taken, the inclined surface of the needle head is tightly attached to the skin, local anesthetic liquid medicine is injected after the intradermal needle enters the skin to form a white orange peel-like skin mound, and then the skin mound is penetrated into the skin to inject medicine in layers. The local anesthetic liquid medicine has certain irritation, and when the local anesthetic liquid medicine is injected, pressurization is carried out to enhance the anesthetic effect, so that tension infiltration is formed in tissues and the local anesthetic liquid medicine is in wide contact with nerve endings, and therefore, the injection part can be obviously painful. Therefore, in the clinical use process, if a distant tissue needs to be infiltrated, the puncture needle is punctured from the infiltrated part last time, so that the puncture pain is reduced. The operation is that the needle is inserted a little bit, then the micro-dose is given, the effect is achieved after a few seconds, the surrounding tissues are infiltrated and anesthetized after the effect is achieved, the pain is eliminated, the needle head is continuously pushed at the moment, the micro-dose is given again, the infiltration is carried out again, and after a few seconds, the operation has the advantage that the patient is painful once when the needle is inserted for the first time.
However, the local anesthesia method has the following operation difficulties: (1) the successive micro-dose and needle insertion amplitude are all dependent on hand feeling, which easily causes uneven distance, uneven pressure and uneven dose of each injection point, when the distance between the injection points is too large or the pressure is too small, the dose is less, the injection pain can occur, and the dose is large, the subsequent anesthetic of the wound or the incision is not enough. (2) The propelling speed is also totally empirical, the local dosage and the propelling speed cannot be matched, and the local anesthetic infiltration amount is insufficient due to the fact that the propelling speed is too fast in emergency, so that the anesthetic effect is influenced.
Therefore, for a long incision or a long wound, the dosage of anesthesia is not estimated well due to human error caused by the above defects, and local anesthesia with less trauma has to be abandoned and another anesthesia method has to be selected.
The existing anesthetic booster is basically only limited to the administration of the anesthesia in the department of stomatology, is used for nerve root block anesthesia and non-step administration, is matched with an administration pump and electronic equipment, has a very short price of 8 to 9 thousands, is not suitable for the existing emergency operation, and lacks popularization.
Disclosure of Invention
The technical task of the invention is to provide a synchronous propelling device for local anesthesia aiming at the defects of the prior art.
The technical scheme for solving the technical problem is as follows: the utility model provides a synchronous advancing device is used to local anesthesia which characterized in that: comprises a guide rail and a propeller; the guide rail is of a hollow structure, a needle head is arranged in the guide rail, and the needle head is connected with a first syringe through a hose; the guide rail is provided with a structure fixed on the human body; the guide rail is provided with a sliding block matched with the guide rail, and the sliding block can slide along the guide rail; the sliding block is propped against the rear end of the needle head; the guide rail is connected with the propeller through two brake lines, namely a first brake line and a second brake line, the two brake lines respectively comprise a line pipe and a line core, and the line core penetrates through the line pipe; one end of a spool of the first brake cable is positioned at the front end of the guide rail, one end of a spool of the second brake cable is positioned at the rear end of the guide rail, and the wire cores of the two brake cables are respectively fixed on the sliding block; the thruster comprises a shell, wherein the shell internally comprises a first brake cable pushing assembly and a second brake cable pushing assembly; the first brake cable pushing assembly comprises a vertical screw driven by a motor, and a speed reducing device is arranged between the motor and the vertical screw; a rack is arranged at the vertical screw rod and is tightly attached to the vertical screw rod, teeth matched with the vertical screw rod are arranged on one side, attached to the vertical screw rod, of the rack, and the teeth of the rack are meshed with threads of the vertical screw rod; a push plate is arranged at the rack; a rack spring is arranged on the rack; the push plate is provided with a push plate spring; the push plate is provided with a push plate handle which penetrates through the shell; an upper switch and a lower switch are respectively arranged above and below the rack, the upper switch and the lower switch are connected to a control circuit of the motor, the motor can be started after the upper switch is triggered, and the motor can be closed after the lower switch is triggered; vertical strip-shaped holes are respectively formed in the shell at positions close to the upper switch and the lower switch; the upper switch and the lower switch are respectively provided with a U-shaped handheld part, and the handheld parts penetrate through corresponding strip-shaped holes of the shell and are exposed outside the shell; a series of horizontal anti-skid grains are arranged on the outer side surface of the handheld part and the side wall of the vertical strip-shaped hole; the second brake cable pushing assembly and the first brake cable pushing assembly are symmetrically distributed and have the same structure; one ends of the line pipes of the first brake line and the second brake line are fixed on the shell, the wire core ends of the first brake line and the second brake line are positioned on the line roller in the shell, and the winding directions of the two wire cores are opposite; and a gear is fixedly arranged on one side of the wire roller and is matched with the two racks.
The needle head is connected with the first syringe and the second syringe through hoses; the propeller shell also comprises an injector pushing assembly; the syringe pushing assembly comprises a syringe placing frame, a power spring, a limiting frame, an adjusting block and a pushing handle; the syringe placing rack is used for placing a barrel part of a first syringe; the power spring is positioned above the piston of the first syringe and provides downward thrust for the piston; the lower end of the limiting frame is of a U-shaped horizontal structure, and the U-shaped horizontal structure is positioned below the upper end cap of the piston rod and used for limiting the motion range of the piston; the piston rod is positioned in the U-shaped opening of the U-shaped horizontal structure; a vertical slide rail matched with the limiting frame is arranged in the shell, and the limiting frame can only move along the vertical direction under the action of the vertical slide rail; a vertical elastic rod is fixedly arranged on the U-shaped horizontal structure, the upper end of the vertical elastic rod is propped against the vertical side wall of the shell, a series of positioning teeth are arranged on the vertical side wall, and the upper end of the vertical elastic rod is clamped in tooth grooves of the positioning teeth, so that the position of the limiting frame is fixed; a vertical strip-shaped hole is formed in the position, close to the pushing handle, of the shell, the pushing handle penetrates through the vertical strip-shaped hole, a handle spring is arranged on the pushing handle, and upward elastic force is provided for the pushing handle through the handle spring; the push handle is provided with an inclined elastic rod which inclines downwards, the lower end of the inclined elastic rod is propped against the vertical elastic rod, the vertical elastic rod is provided with a series of ratchets, the lower end of the inclined elastic rod is propped against the ratchets, and the inclined elastic rod forms a pawl structure; the adjusting block is of a U-shaped structure and is located in a strip-shaped hole where the pushing handle is located, and a series of horizontal anti-skid grains are arranged on the outer side surface of the adjusting block and the side wall of the vertical strip-shaped hole where the adjusting block is located.
Compared with the prior art, the invention has the following outstanding beneficial effects:
1. the push type drug delivery of the invention can relieve puncture pain and injection pain to the maximum extent, has small probability of anxiety and phobia of patients and little dispute between doctors and patients
2. For long incision or long wound, the boosting mode is improved, manual hand feeling errors are avoided, the uniform distance propulsion is realized, the probability of dislocation is less, infiltration anesthesia is promoted, and the whole injection is painless;
3. the injection pressure and the injection dosage are kept stable, so that the anesthetic can be rapidly diffused, and the onset time is accelerated.
4. When the operation time is too long and the anesthetic needs to be supplemented, the needle can be reversely withdrawn for the second time to repeatedly carry out the point-type administration.
5. The device does not need to be developed excessively, and is low in cost and convenient to popularize.
Drawings
Fig. 1 is a schematic view of the structure of the guide rail of the present invention.
Fig. 2 is a schematic view of the slider and needle configuration of the present invention.
Figure 3 is a schematic view of the syringe, hose and needle arrangement of the present invention.
FIG. 4 is a schematic view of the first brake cable advancing assembly and the second brake cable advancing assembly of the present invention.
FIG. 5 is a schematic diagram of the syringe drive assembly of the present invention.
Fig. 6 is a schematic top view of the upper switch of the present invention.
Fig. 7 is a schematic view of the wire roller, gear, rack and vertical screw configuration of the present invention.
Detailed Description
The invention is further described with reference to the drawings and the detailed description.
As shown in fig. 1 to 7, the present invention includes a guide rail 2 and a pusher.
As shown in figure 1, the guide rail 2 is a hollow structure, and a needle 1 is arranged inside the guide rail 2. As shown in fig. 3, the needle 1 is connected with two syringes, i.e. a first syringe 9 and a second syringe 10, through a hose 4, the first syringe 9 is used for injecting the anesthetic, and the second syringe 10 is used for withdrawing, i.e. firstly withdrawing before injection to confirm whether the needle 1 is punctured into a blood vessel. The guide rail 2 is provided with a structure for fixing on the human body, such as a suction cup 6, an adhesive tape, etc., so that the guide rail 2 is fixed on the skin of the human body. The guide rail 2 is provided with a slide block 3 matched with the guide rail 2, and the slide block 3 can slide along the guide rail 2. The sliding block 3 is propped against the rear end of the needle head 1, and when the sliding block 3 moves forwards, the needle head 1 can be pushed forwards synchronously. The front end of the needle 1 extends from the track 2 and in use the front end of the needle 1 penetrates into the subcutaneous tissue.
The propeller comprises a shell 11, and a first brake cable pushing assembly, a second brake cable pushing assembly and an injector pushing assembly are arranged in the shell 11.
As shown in fig. 4, the first brake cable pushing assembly includes a vertical screw 18 driven by a motor 13, and a speed reducing device, such as a worm gear 12 or other structures, is arranged between the motor 13 and the vertical screw 18. The vertical screw 18 is provided with a rack 17, the rack 17 is tightly attached to the vertical screw 18, one side of the rack 17, which is attached to the vertical screw 18, is provided with teeth matched with the vertical screw 18, and the teeth of the rack 17 are meshed with threads of the vertical screw 18, so that the rack 17 can be driven to move when the vertical screw 18 rotates. A push plate 16 is arranged at the rack 17, and the push plate 16 provides horizontal thrust for the rack 17, so that the rack 17 is tightly attached to the vertical screw 18 through the thrust. The rack 17 is provided with a rack spring 14, and the rack 17 is provided with upward elastic force by the rack spring 14. The push plate 16 is provided with a push plate spring 20, the push plate 16 is provided with horizontal elastic force under the action of the push plate spring 20, and the push plate 16 is provided with thrust to the rack 17 through the elastic force. The push plate 16 is provided with a push plate handle 19, the push plate handle 19 penetrates through the shell 11, and one end of the push plate handle is exposed out of the shell 11. After the push plate handle 19 is pulled, the push plate 16 can be separated from the rack 17, and then the rack 17 and the vertical screw 18 can be separated from each other, and at the moment, the rack 17 can be pulled upwards under the action of the rack spring 14. An upper switch 15 and a lower switch 22 are respectively arranged above and below the rack 17, the upper switch 15 and the lower switch 22 are connected to a control circuit of the motor 13, the motor 13 can be started after the upper switch 15 is triggered, and the motor 13 can be closed after the lower switch 22 is triggered. And vertical strip-shaped holes are respectively formed in the shell 11 at positions close to the upper switch 15 and the lower switch 22. The upper switch 15 and the lower switch 22 are respectively provided with a U-shaped handheld portion, and the handheld portions penetrate through corresponding strip-shaped holes of the shell 11 and are exposed outside the shell 11. The lateral surface of handheld portion and the lateral wall in vertical bar hole on all be equipped with a series of horizontally anti-skidding line, during natural state, through the mutual interlock of the anti-skidding line of the two, can prevent its vertical slip. As shown in fig. 6, the U-shaped handle is pinched to separate the handle from the texture of the strip-shaped hole, so that the height of the upper switch 15 or the lower switch 22 can be freely adjusted.
The second brake cable pushing assembly and the first brake cable pushing assembly are symmetrically distributed and have the same structure.
Spool one end of a brake cable 8 and a brake cable 5 is fixed on casing 11, the sinle silk 7 tip of a brake cable 8 and a brake cable 5 is located the line roller 21 in casing 11, wherein the winding direction of two sinle silks 7 is opposite, when line roller 21 is rotatory, a sinle silk 7 upwards moves, another sinle silk 7 downwards moves. As shown in fig. 7, a gear 33 is fixedly arranged on one side of the thread roller 21, the gear 33 is matched with the two racks 17, when one of the racks 17 moves downwards to a certain position, teeth on the rack 17 can be meshed with the gear 33 and drive the gear 33 to rotate, the gear 33 drives the thread roller 21 to rotate, and then one of the thread cores 7 is pulled.
The injector pushing assembly comprises an injector placing frame 25, a power spring 23, a limiting frame 32, an adjusting block 29 and a pushing handle 27. The syringe placing rack 25 is used for placing the barrel part of the first syringe 9. The power spring 23 is positioned above the piston of the first syringe 9 and provides downward thrust to the piston. The lower end of the limiting frame 32 is provided with a U-shaped horizontal structure 31, and the U-shaped horizontal structure 31 is positioned below the upper end cap of the piston rod 24 and used for limiting the motion range of the piston. The piston rod 24 is located in the U-shaped opening of the U-shaped horizontal structure 31. A vertical slide rail adapted to the limiting frame 32 is arranged in the housing 11, and the limiting frame 32 can only move in the vertical direction through the action of the vertical slide rail. A vertical elastic rod 30 is fixedly arranged on the U-shaped horizontal structure 31, the upper end of the vertical elastic rod 30 is propped against the vertical side wall of the shell 11, a series of positioning teeth are arranged on the vertical side wall, and the upper end of the vertical elastic rod 30 is clamped in tooth grooves of the positioning teeth, so that the position of the limiting frame 32 is fixed. The position that is close to push handle 27 on casing 11 is equipped with vertical bar hole, push handle 27 pass vertical bar downthehole, be equipped with handle spring 26 on the push handle 27, provide ascending elasticity for push handle 27 through handle spring 26. The push handle 27 is provided with an inclined elastic rod 28 which inclines downwards, the lower end of the inclined elastic rod 28 is propped against the vertical elastic rod 30, the vertical elastic rod 30 is provided with a series of ratchets, the lower end of the inclined elastic rod 28 is propped against the ratchets, the inclined elastic rod 28 forms a pawl structure, and the direction of the ratchets enables the inclined elastic rod 28 to push the vertical elastic rod 30 to move downwards in a single direction. The regulating block 29 be the U-shaped structure, be located the bar hole that promotes handle 27 place, the lateral surface of regulating block 29 and the lateral wall in the vertical bar hole at its place on all be equipped with a series of horizontally anti-skidding lines, during the natural state, through the mutual interlock of the anti-skidding line of the two, can prevent that regulating block 29 from vertically sliding. The U-shaped structure of the adjusting block 29 is pinched, so that the handheld part of the adjusting block 29 is separated from the grains of the strip-shaped hole, and the height of the adjusting block 29 can be freely adjusted. The adjustment block 29 serves to limit the stroke of pushing the push handle 27.
When injection is needed, the pushing handle 27 is pressed downwards, the vertical elastic rod 30 is pushed downwards obliquely through the action of the inclined elastic rod 28, the vertical elastic rod 30 deflects backwards, the upper end of the vertical elastic rod is separated from the tooth groove of the positioning tooth, and then the limiting frame 32 is pushed downwards for a distance through the action of the inclined elastic rod 28. When the hand is released, the push handle 27 is pulled upward by the handle spring 26. The piston moves downwards by a distance equal to the distance of the pushing handle 27 under the driving of the power spring 23, so that the injection process is completed, and the injection amount in each injection can be adjusted through the adjusting block 29.
The operation flow is as follows: before use, the needle 1 and syringe are first mounted in the manner shown in the drawings, the positions of the upper switch 15, the lower switch 22 and the adjustment block 29 are adjusted, and then the needle 1 is inserted into the skin of a patient. Before injection, the second syringe 10 is pulled to be drawn back, if blood returns, the needle 1 is inserted into a blood vessel, the position of the needle needs to be continuously adjusted, and if blood does not return, the push handle 27 is pressed to inject the anesthetic. At the moment, the push plate handle 19 is pulled, the rack 17 is separated from the vertical screw 18 under the action of the rack spring 14 and is pulled upwards to the position of the upper switch 15, the rack 17 is prevented from moving upwards under the action of the upper switch 15, the upper switch 15 is triggered through the rack 17, the motor 13 of the brake cable 8 assembly I is started through the upper switch 15, the vertical screw 18 is driven to rotate slowly through the motor 13, the rack 17 is driven to move downwards slowly through the vertical screw 18, the rack 17 is meshed with the gear 33 after a period of time, the gear 33 is driven to rotate through the rack 17, the gear 33 drives the wire roller 21 to rotate, the wire core 7 of the brake cable 8I is pulled through the wire roller 21, the needle 1 is pulled to move forwards, and the needle 1 is advanced for a certain distance; when the rack 17 moves downwards to the lower switch 22, the lower switch 22 is triggered, the motor 13 is switched off through the lower switch 22, and the needle 1 stops advancing. When the needle 1 stops moving, the operation of withdrawing and injecting is carried out. The movement stroke of the rack 17 can be adjusted by adjusting the upper switch 15 and the lower switch 22, so that the interval time of anesthetic injection can be adjusted; by adjusting the position of the lower switch 22, the rotating angle of the thread roller 21 can be adjusted, and the moving distance of the needle head 1 is further adjusted, namely the needle inserting amplitude is adjustable.
When the operation time is too long and the anesthetic needs to be supplemented, the needle 1 can be repeatedly administered in a point mode in the process of being reversely withdrawn. The operation process is the same as the above, only the first brake cable pushing assembly is changed into the second brake cable pushing assembly.
It should be noted that while the invention has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various obvious changes can be made therein without departing from the spirit and scope of the invention.
Claims (1)
1. The utility model provides a synchronous advancing device is used to local anesthesia which characterized in that: comprises a guide rail and a propeller; the guide rail is of a hollow structure, a needle head is arranged in the guide rail, and the needle head is connected with the first syringe through a hose; the guide rail is provided with a structure fixed on the human body; the guide rail is provided with a sliding block matched with the guide rail, and the sliding block can slide along the guide rail; the sliding block is propped against the rear end of the needle head; the guide rail is connected with the propeller through two brake lines, namely a brake line I and a brake line II, the two brake lines respectively comprise a line pipe and a line core, and the line core penetrates through the line pipe; one end of a spool of the first brake cable is positioned at the front end of the guide rail, one end of a spool of the second brake cable is positioned at the rear end of the guide rail, and the wire cores of the two brake cables are respectively fixed on the sliding block; the thruster comprises a shell, wherein the shell internally comprises a first brake cable pushing assembly and a second brake cable pushing assembly; the first brake cable pushing assembly comprises a vertical screw driven by a motor, and a speed reducing device is arranged between the motor and the vertical screw; a rack is arranged at the vertical screw rod and is tightly attached to the vertical screw rod, teeth matched with the vertical screw rod are arranged on one side, attached to the vertical screw rod, of the rack, and the teeth of the rack are meshed with threads of the vertical screw rod; a push plate is arranged at the rack; a rack spring is arranged on the rack; the push plate is provided with a push plate spring; the push plate is provided with a push plate handle which penetrates through the shell; an upper switch and a lower switch are respectively arranged above and below the rack, the upper switch and the lower switch are connected to a control circuit of the motor, the motor can be started after the upper switch is triggered, and the motor can be closed after the lower switch is triggered; vertical strip-shaped holes are respectively formed in the positions, close to the upper switch and the lower switch, of the shell; the upper switch and the lower switch are respectively provided with a U-shaped handheld part, and the handheld parts pass through corresponding strip-shaped holes of the shell and are exposed outside the shell; a series of horizontal anti-skid grains are arranged on the outer side surface of the handheld part and the side wall of the vertical strip-shaped hole; the second brake cable pushing assembly and the first brake cable pushing assembly are symmetrically distributed and have the same structure; one ends of the line pipes of the first brake line and the second brake line are fixed on the shell, the wire core ends of the first brake line and the second brake line are positioned on the line roller in the shell, and the winding directions of the two wire cores are opposite; a gear is fixedly arranged on one side of the wire roller and is matched with the two racks; the needle head is connected with the first syringe and the second syringe through hoses; the propeller shell also comprises an injector pushing assembly; the syringe pushing assembly comprises a syringe placing frame, a power spring, a limiting frame, an adjusting block and a pushing handle; the syringe rack is used for placing the barrel part of the first syringe; the power spring is positioned above the piston of the first syringe and provides downward thrust for the piston; the lower end of the limiting frame is of a U-shaped horizontal structure, and the U-shaped horizontal structure is positioned below the upper end cap of the piston rod and used for limiting the motion range of the piston; the piston rod is positioned in the U-shaped opening of the U-shaped horizontal structure; a vertical slide rail matched with the limiting frame is arranged in the shell, and the limiting frame can only move along the vertical direction under the action of the vertical slide rail; a vertical elastic rod is fixedly arranged on the U-shaped horizontal structure, the upper end of the vertical elastic rod is propped against the vertical side wall of the shell, a series of positioning teeth are arranged on the vertical side wall, and the upper end of the vertical elastic rod is clamped in tooth grooves of the positioning teeth, so that the position of the limiting frame is fixed; a vertical strip-shaped hole is formed in the position, close to the pushing handle, of the shell, the pushing handle penetrates through the vertical strip-shaped hole, a handle spring is arranged on the pushing handle, and upward elastic force is provided for the pushing handle through the handle spring; the push handle is provided with an inclined elastic rod which inclines downwards, the lower end of the inclined elastic rod is propped against the vertical elastic rod, the vertical elastic rod is provided with a series of ratchets, the lower end of the inclined elastic rod is propped against the ratchets, and the inclined elastic rod forms a pawl structure; the adjusting block is of a U-shaped structure and is located in a strip-shaped hole where the pushing handle is located, and a series of horizontal anti-skid grains are arranged on the outer side surface of the adjusting block and the side wall of the vertical strip-shaped hole where the adjusting block is located.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110782515.1A CN113509623B (en) | 2021-07-12 | 2021-07-12 | Synchronous propelling device for local anesthesia |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110782515.1A CN113509623B (en) | 2021-07-12 | 2021-07-12 | Synchronous propelling device for local anesthesia |
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| CN113509623A CN113509623A (en) | 2021-10-19 |
| CN113509623B true CN113509623B (en) | 2022-10-04 |
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