CN206081232U - High accuracy anesthetic syringe - Google Patents

Abstract

The utility model discloses a high-precision anesthesia syringe, which comprises a syringe made of transparent material. The syringe is provided with a capacity scale, and a needle is arranged on the front end of the syringe. A first piston and a second piston are provided, the second piston is arranged in front of the first piston, the first piston rod is fixed on the first piston, the second piston rod is fixed on the second piston, and the center of the first piston is set There is a through hole, a driving nut is embedded in the first piston rod, the second piston rod passes through the through hole, the driving nut and the first piston rod in turn and protrudes from the other end of the first piston rod, and the second piston rod An external thread is provided, the second piston rod and the drive nut are threaded, and a locking mechanism is provided between the first piston rod and the injection barrel. The beneficial effects obtained by the utility model are: (1) the structure is simple; (2) the injection volume of the anesthetic can be precisely controlled, thereby meeting the injection requirements of the anesthetic.

Description

A high-precision anesthesia syringe

technical field

The utility model relates to a medical device for anesthesia, in particular to a high-precision anesthesia syringe.

Background technique

In medical practice, for patients who need surgery, anesthesia is usually injected into the surgical site before the operation to reduce the pain of the patient during the operation. At present, the anesthetic is generally injected with a common syringe, but the existing syringe During the injection, it is difficult to accurately control the injection amount of the anesthetic, so it is difficult to meet the injection requirements of the anesthetic.

Contents of the invention

The problem to be solved by the utility model is to provide a high-precision anesthesia injector with simple structure and capable of precisely controlling the injection amount of anesthetic.

In order to solve the above problems, the high-precision anesthesia syringe of the present utility model includes a syringe made of transparent material, the syringe is provided with a capacity scale, and a needle is arranged on the front end of the syringe, and the needle is connected to the The injection cylinders are connected, and the injection cylinder is provided with a first piston and a second piston, the second piston is arranged in front of the first piston, the first piston rod is fixed on the first piston, and the second piston rod is fixed on the first piston. A second piston rod is fixed on the piston, a through hole is arranged at the center of the first piston, a driving nut is embedded in the first piston rod, and the second piston rod passes through the through hole, the driving nut in sequence and the first piston rod and stretch out from the other end of the first piston rod, the second piston rod is provided with external threads, the second piston rod and the drive nut are threaded, the first piston rod There is a locking mechanism between the syringe and the syringe.

In order to facilitate the locking of the position of the first piston rod, in the high-precision anesthesia syringe of the present invention, the locking mechanism includes a limit rack arranged on the outer surface of the first piston rod and two limit racks inserted into the injection barrel. Block, two limit blocks are set opposite to each other, the bottom surface of the limit block is provided with locking teeth, the lock teeth match the limit rack, the top of the limit block is provided with a tension block, the A tension spring is arranged between the tension block and the injection barrel.

In order to facilitate upward movement of the pulling block, in the high-precision anesthesia syringe of the present invention, a pull ring is provided on the top surface of the tensioning block.

In order to facilitate the rotation of the second piston rod, in the high-precision anesthesia syringe of the present invention, several rotating rods are evenly distributed at the end of the second piston rod.

In the high-precision anesthesia syringe of the utility model, the injection barrel is made of glass or transparent plastic.

The beneficial effects obtained by the utility model are: (1) the structure is simple; (2) before injecting the anesthesia, the anesthesia is sucked into the injection cylinder first, and then the needle is pierced into the part of the patient's body that needs anesthesia, and then the patient can be injected Anesthesia, when it is not necessary to precisely control the injection volume of anesthetics, the medical staff first inserts the index finger and thumb of one hand into the two pull rings, pulls the rings respectively and pulls the limit block outward against the rubbish of the tension spring , as the limit block moves outward, the locking tooth on the limit block will be separated from the limit rack on the first piston rod, so that the locking of the first piston rod is released, and then push The first piston rod continuously moves into the injection barrel. During the movement, because the first piston rod continuously squeezes the first piston and the second piston, the second piston squeezes the anesthetic agent, thereby pushing the injection barrel The anesthetic agent in the needle is continuously injected into the patient's body through the needle. When it is necessary to precisely control the injection volume of the anesthetic agent, loosen the pull ring, and under the tension of the tension spring, the limit block is reset, and the locking teeth on the limit block will be Re-insert it into the limit rack to lock the position of the limit rack and the first piston rod, and then grasp and rotate the rotating rod continuously. Driven by the rotating rod, the second piston rod will continuously drive along the When the nut rotates, the second piston rod will continuously drive the second piston to move into the injection barrel while the second piston rod is rotating, so as to continuously inject the anesthetic into the patient's body. Since the pitch of the external thread is ≤1mm, the second piston rod The moving distance of the second piston is less than 1mm per rotation, so the injection speed of the anesthetic agent is very slow under the push of the second piston rod and the second piston. At this time, the anesthetic agent can be precisely controlled by referring to the volume scale on the syringe (3) There is a pull ring on the top surface of the tension block, which is convenient for pulling the limit block to move; (4) There are several rotating rods evenly distributed at the end of the second piston rod , it is convenient to drive the second piston rod to rotate; (5) the injection cylinder is made of glass or transparent plastic, which is convenient for checking the injection status of the anesthetic in real time.

Description of drawings

Fig. 1 is a sectional view of the utility model.

Fig. 2 is the front view of the utility model.

In the figure: 1. Needle, 2. Injection barrel, 3. Second piston, 4. First piston, 5. First piston rod,

6. Limit rack, 7. Drive nut, 8. Pull ring, 9. Limit block, 10. Tension spring, 11. Lock tooth,

12, the second piston rod, 13, the rotating rod, 14, the through hole, 15, the tension block, 16, the capacity scale.

detailed description

As shown in Figures 1 and 2, the high-precision anesthesia syringe of the present utility model includes a syringe 2 made of a transparent material, the syringe 2 is provided with a capacity scale 16, and the front end of the syringe 2 A needle 1 is provided, and the needle 1 communicates with the syringe 2, and the syringe 2 is provided with a first piston 4 and a second piston 3, and the second piston 3 is arranged in front of the first piston 4, so that The first piston 4 is fixed with a first piston rod 5, the second piston 3 is fixed with a second piston rod 12, and the center of the first piston 4 is provided with a through hole 14. A driving nut 7 is embedded in the rod 5, and the second piston rod 12 passes through the through hole 14, the driving nut 7 and the first piston rod 5 successively and stretches out from the other end of the first piston rod 5, and the second piston rod 12 The piston rod 12 is provided with an external thread, the pitch of the external thread is ≤ 1mm, the second piston rod 12 is threadedly connected to the drive nut 7, and the first piston rod 5 and the injection barrel 2 are provided with Locking mechanism; the locking mechanism includes a limit rack 6 arranged on the outer surface of the first piston rod 5 and two limit blocks 9 inserted in the injection barrel 2, and the two limit blocks 9 are arranged oppositely, so The bottom surface of the limiting block 9 is provided with locking teeth 11, the locking teeth 11 are matched with the limiting rack 6, and the top of the limiting block 9 is provided with a tightening block 15, and the tightening block 15 is connected to the A tension spring 10 is arranged between the injection cylinders 2; a pull ring 8 is arranged on the top surface of the tension block 15; several rotating rods 13 are evenly distributed on the end of the second piston rod 12; the injection The cartridge 2 is made of glass or transparent plastic.

The high-precision anesthesia syringe of the utility model has a simple structure. Before injecting the anesthetic agent, the anesthetic agent is sucked into the injection cylinder 2 first, and then the needle 1 is inserted into the part of the patient's body that needs anesthesia, and then the patient can be injected with the anesthetic agent. When there is no need to accurately control the injection volume of anesthetic, the medical personnel first insert the index finger and thumb of one hand into the two pull rings 8, respectively pull the pull rings 8 and overcome the rubbish of the tension spring 10 to pull the limit block outward 9. As the limit block 9 moves outward, the locking tooth 11 on the limit block 9 will be separated from the limit rack 6 on the first piston rod 5, so that the first piston is released. Lock the rod 5, and then push the first piston rod 5 to move continuously into the syringe 2. During the movement, because the first piston rod 5 constantly squeezes the first piston 4 and the second piston 3, the second The piston 3 squeezes the anesthetic, so that the anesthetic in the syringe 2 is continuously injected into the patient's body through the needle 1. When it is necessary to precisely control the injection amount of the anesthetic, the ring 8 is loosened, and the tension of the spring 10 is tightened. Under the action, the limit block 9 resets, and the locking teeth 11 on the limit block 9 will be reinserted in the limit rack 6, thereby locking the positions of the limit rack 6 and the first piston rod 5, and then grasping and Continuously rotate the rotating rod 13, driven by the rotating rod 13, the second piston rod 12 will continuously rotate along the drive nut 7, and the second piston rod 12 will continuously drive the second piston 3 directions while rotating. The injection cylinder 2 is constantly moving, so that the anesthetic agent is continuously injected into the patient's body. Since the pitch of the external thread is less than or equal to 1mm, the second piston rod 12 rotates once, and the moving distance of the second piston 3 is less than 1mm. Pushed by the rod 12 and the second piston 3, the injection speed of the anesthetic is very slow. At this time, referring to the capacity scale 16 on the syringe 2, the injection volume of the anesthetic can be precisely controlled, thereby meeting the injection requirements of the anesthetic.

In the high-precision anesthesia syringe of the present utility model, a pull ring 8 is arranged on the top surface of the tightening block 15, which is convenient for pulling the stop block 9 to move.

In the high-precision anesthesia syringe of the present utility model, several rotating rods 13 are evenly distributed at the end of the second piston rod 12, which is convenient to drive the second piston rod 12 to rotate, and the injection cylinder 2 is made of glass or transparent plastic, which is convenient for real-time viewing of anesthetics injection status.

Claims (5)

1. a kind of high accuracy anesthetic syringe, it is characterised in that：Including the injection tube (2) being made of clear material, the injection Cylinder (2) is provided with containing mark (16), and the front end face of the injection tube (2) is provided with syringe needle (1), the syringe needle (1) and injection Cylinder (2) is connected, and is provided with first piston (4) and second piston (3) in the injection tube (2), and the second piston (3) is located at the The front of one piston (4), is fixed with First piston bar (5), is fixed with the second piston (3) on the first piston (4) Second piston bar (12), the center of the first piston (4) are provided with a through hole (14), and the First piston bar (5) embeds Enter to have a drive nut (7), the second piston bar (12) to sequentially pass through through hole (14), drive nut (7) and first piston Bar (5) the other end from First piston bar (5) is stretched out, the second piston bar (12) is provided with external screw thread, the outer spiral shell Pitch≤the 1mm of stricture of vagina, to be threadedly coupled between the second piston bar (12) and drive nut (7), the First piston bar (5) Locking mechanism is provided between injection tube (2).

2. high accuracy anesthetic syringe according to claim 1, it is characterised in that：The locking mechanism includes being arranged on Spacing tooth bar (6) and two limited blocks (9) being inserted in injection tube (2) on the outer surface of one piston rod (5), two spacing Block (9) is oppositely arranged, and the bottom surface of the limited block (9) is provided with locking teeth (11), the locking teeth (11) and spacing tooth bar (6) Match, tension block (15) is provided with the top of the limited block (9), between tension block (15) and injection tube (2), drawing is provided with Tight spring (10).

3. high accuracy anesthetic syringe according to claim 2, it is characterised in that：Set on the top surface for tensing block (15) There is draw ring (8).

4. high accuracy anesthetic syringe according to claim 1, it is characterised in that：The end of the second piston bar (12) Be evenly equipped with several bull sticks (13).

5. high accuracy anesthetic syringe according to claim 1, it is characterised in that：The injection tube (2) is by glass or thoroughly Bright plastics are made.