CN211512950U

CN211512950U - Syringe for local anesthesia

Info

Publication number: CN211512950U
Application number: CN202020159252.XU
Authority: CN
Inventors: 王振国
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-10
Filing date: 2020-02-10
Publication date: 2020-09-18
Anticipated expiration: 2030-02-10

Abstract

The utility model relates to the field of medical equipment, in particular to an injector for local anesthesia, which is characterized in that a guide hole is arranged at the rear end of a medicine tube, and a push rod passes through the guide hole; a pressing handle is arranged on the outer side of the medicine tube, the middle rear part of the pressing handle is rotationally connected with the hinged support, the rear end of the pressing handle is connected with a stop ring, and the stop ring is sleeved outside the push rod; the middle front part of the pressing handle is pressed towards the direction of the medicine tube, and the inner side of the stop ring is tightly attached to the push rod to prevent the push rod from moving forwards; an elastic sleeve is fixed outside the medicine tube, and a hanging part is arranged on the push handle; after the elastic sleeve is connected with the hanging part, the elastic sleeve can drive the push rod to move forwards through retraction to realize medicine injection. The injector for local anesthesia has scientific and reasonable structure, is convenient and quick to use, can easily control the medicament injection state by only using fingers, saves time and labor, and is extremely suitable for single-hand operation; the handheld syringe is stable, the swing or the displacement of the puncture needle can be reduced or even avoided, and the injection effect and the operation efficiency of local anesthetics are ensured.

Description

Syringe for local anesthesia

Technical Field

The utility model relates to a medical appliance, in particular to an injector used in clinical local anesthesia operation.

Background

Local anesthesia is to apply local anesthetic with strong penetrating power to the mucosal surface through an injection device, so that a drug penetrates through the mucosa to block the superficial nerve endings to generate mucosal anesthesia, which is one of the more common clinical surgical anesthesia methods. At present, when local anesthesia operation is clinically performed, the most commonly used injection device is a common disposable injector, and certain defects exist in use and operation, specifically, when an anesthetist performs local anesthetic injection operation, in order to avoid displacement of a punctured part, the body surface around the punctured part is usually pressed by one hand, so that the injector can be punctured and injected by only one hand of the other hand, and the operation mode has certain operation difficulty and higher requirement on hand strength of the anesthetist; the injection can be carried out only by adjusting the grasping mode of the injector after the expected puncture is finished, and in addition, the hand is easy to fatigue and shake in the injection process, so that the puncture needle is easy to swing or shift based on the factors, the anesthesia efficiency and effect can be influenced, and serious adverse effects can be caused if the puncture needle is carelessly punctured into a blood vessel; particularly, in the local infiltration anesthesia operation, multiple times of puncture and bolus injection are needed, and the total injection dosage is larger, and a common large-size injector is needed for local anesthetic injection, so that the defects are more obvious. In addition, in the other step, even when a general syringe is used for local anesthesia operation, an anesthesiologist has a condition that two hands operate the syringe, but the conventional general syringe is limited by structural characteristics and is not beneficial to holding operation by two hands.

SUMMERY OF THE UTILITY MODEL

A technical object of the utility model is to provide a rational in infrastructure, convenient to use is swift, and the anaesthesia doctor one hand of being convenient for especially accomplishes the puncture and injects, can guarantee the local anesthetic injection effect and show the syringe for local anesthesia that improves local anesthesia operating efficiency.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

an injector for local anesthesia comprises a medicine tube, a piston in sealing sliding fit with the medicine tube, and a push rod fixedly connected with the piston, wherein the front end of the medicine tube is provided with a joint for connecting a puncture needle, and the rear end of the push rod is provided with a push handle; the method is characterized in that: the rear end of the medicine tube is provided with a guide hole, and the push rod penetrates through the guide hole and is in sliding fit with the guide hole; the outer side of the medicine tube is provided with a pressing handle which is separated from the medicine tube and extends forwards and backwards, the middle rear part of the pressing handle is rotatably connected with a hinged support, the hinged support is fixed on the outer side of the rear end of the medicine tube, the rear end of the pressing handle is connected with a stop ring, and the stop ring is positioned on the rear side of the guide hole and sleeved outside the push rod; the middle front part of the pressing handle is pressed towards the direction of the medicine tube, and the inner side of the stop ring is tightly attached to the push rod to prevent the push rod from moving forwards; an elastic sleeve is fixed outside the medicine tube, and a hanging part matched with the elastic sleeve is arranged on the push handle; the elastic sleeve is in a stretching state after being connected with the hanging part, and the elastic sleeve can drive the push rod to move forwards through retraction, so that the medicine injection is realized.

The using method and the working principle of the injector for local anesthesia are as follows:

in clinical use, under the condition that the pressing handle is not pressed, the local anesthetic is configured and sucked according to the traditional operation mode, and air in the medicine tube is discharged; then, the medicine tube is held by one hand and the pressing handle (the middle front part) is pressed by fingers, the push rod cannot move forwards due to the fact that the inner side of the stop ring is tightly propped against the push rod, the elastic sleeve is held by the other hand to stretch backwards, the rear end of the elastic sleeve is hung on the hanging part of the pushing handle, and therefore the preparation work of local anesthetic injection is completed; can carry out puncture and medicine injection afterwards, puncture at every turn and accomplish the back, when the finger loosens and presses the handle, the push rod will be at elastic sleeve's the driving down and the antedisplacement, realize injecting promptly, press the handle with the finger, the stop ring will prevent the push rod to move forward, stops injecting promptly, utilizes the one hand to puncture from injecting, laborsaving swift completion local anesthetic's injection.

Compared with the prior art, the utility model, have following technological effect:

the injector for local anesthesia has a scientific and reasonable structure, is convenient and quick to use, realizes energy accumulation by stretching the elastic sleeve before puncture, can easily control the medicine injection state by only adjusting the pressing state of the pressing handle by fingers in the medicine injection process, saves time and labor, and is extremely suitable for single-hand operation; in the whole medicine injection process, the force application of the hand is small, the hand-held injector is more stable, the swinging or the displacement of the puncture needle can be reduced or even avoided, and the injection effect and the operation efficiency of the local anesthetic are ensured; particularly, in the local infiltration anesthesia operation, multiple times of puncture and bolus injection are needed, and the local anesthetic injection by adopting the injector for local anesthesia has more remarkable advantages.

Drawings

Fig. 1 is a schematic view showing a structure of a syringe for local anesthesia before use.

Fig. 2 is an exploded view of the syringe for local anesthesia.

Fig. 3 is a schematic view showing a state in which the syringe for local anesthesia is used.

Fig. 4 is a second schematic view showing the state of use of the syringe for local anesthesia.

FIG. 5 is a schematic view of the stop ring blocking forward movement of the thrust rod when the handle is depressed.

In the figure, 1, a connector, 2, a pressing handle, 3, an elastic sleeve, 4, a placing groove, 5, a pushing handle, 6, a hanging part, 61, a groove, 7, a pushing rod, 8, a stop ring, 9, a fixing ring, 10, a hinge seat, 11, a medicine tube, 12, a guide hole, 13 and a piston.

Detailed Description

The utility model discloses an injector for local anesthesia, which comprises a drug tube 11, a piston 13 which is in sealing sliding fit with the drug tube 11, and a push rod 7 which is fixedly connected with the piston 13, wherein the front end of the drug tube 11 is provided with a joint 1 for connecting a puncture needle, and the rear end of the push rod 7 is provided with a push handle 5; a guide hole 12 is arranged at the rear end of the medicine tube 11, and the push rod 7 passes through the guide hole 12 and extends to the rear of the medicine tube 11; the guide hole 12 is in sliding fit with the push rod 7, so that the guide hole 12 can provide guiding and limiting effects for the push rod 7; the outer side of the medicine tube 11 is provided with a pressing handle 2 which is separated from the medicine tube and extends forwards and backwards, the pressing handle 2 is in a long and thin slab shape, the middle rear part of the pressing handle 2 is rotationally connected with a hinged support 10, the hinged support 10 is fixed on the outer side of the rear end of the medicine tube 11, the rear end of the pressing handle 2 is connected with a stop ring 8, and the stop ring 8 is positioned on the rear side of the guide hole 12 and is sleeved outside the push rod 7; the middle front part of the pressing handle 2 is pressed towards the direction of the medicine tube 11 by fingers, the tail end of the pressing handle 2 drives the stop ring 8 to move outwards, so that the inner side of the stop ring 8 is tightly attached to the push rod 7, and the push rod 7 can be stopped from moving forwards; an elastic sleeve 3 is fixed outside the medicine tube 11, and a hanging part 6 matched with the elastic sleeve 3 is arranged on the push handle 5; after the elastic sleeve 3 is manually connected with the hanging part 6, the elastic sleeve 3 is in a stretching state, at the moment, the elastic sleeve 3 can drive the push rod 7 to move forwards through retraction, and the push rod 7 drives the piston 13 to move forwards, so that medicine injection is realized.

in clinical use, firstly, under the condition that the pressing handle 2 is not pressed, the local anesthetic is configured and sucked according to the traditional operation mode, and air in the medicine tube 11 is discharged; then, holding the medicine tube 11 with one hand and pressing the pressing handle 2 (the middle front part) with fingers, making the push rod 7 unable to move forward due to the inner side of the stop ring 8 tightly abutting against the push rod 7, grasping the elastic sleeve 3 with the other hand and stretching backwards, hanging the rear end of the elastic sleeve 3 on the hanging part 6 of the pushing handle 5, thus completing the preparation work of local anesthetic injection; subsequently, puncture and medicine injection can be carried out, after each puncture is finished, no external force is used for driving the stop ring 8 to be tightly attached to the push rod 7 when the finger loosens the pressing handle 2, so that the push rod 7 can move forwards under the driving of the elastic sleeve 3, namely, pushing injection is realized, the pressing handle 2 is pressed down by the finger, the stop ring 8 is tightly attached to the push rod 7 to prevent the push rod 7 from moving forwards, namely, stopping the pushing injection, and therefore, the puncture and the pushing injection are carried out by using one hand, and the injection of local anesthetic is rapidly and laborsavingly completed.

The injector for local anesthesia has a scientific and reasonable structure, is convenient and quick to use, realizes energy accumulation by stretching the elastic sleeve 3 before puncture, can easily control the medicine injection state by only adjusting the pressing state of the pressing handle 2 by fingers in the medicine injection process, saves time and labor, and is extremely suitable for single-hand operation; in the whole medicine injection process, the force application of the hand is small, the hand-held injector is more stable, the swinging or the displacement of the puncture needle can be reduced or even avoided, and the injection effect and the operation efficiency of the local anesthetic are ensured; particularly, in the local infiltration anesthesia operation, multiple times of puncture and bolus injection are needed, and the local anesthetic injection by adopting the injector for local anesthesia has more remarkable advantages.

In addition, if the general anesthesia syringe is used to inject local anesthesia, the local anesthesia syringe can be used by the general anesthesia syringe as long as the pressing handle 2 is not pressed when the drug tube 11 is held.

In the injector for local anesthesia, the pressing handle 2 is arranged outside the medicine tube 11 and is used for driving the stop ring 8 to move, and the pressing handle 2 extends along the front and back direction of the medicine tube 11 and can adopt a slender slab-shaped design, so that the existence of the pressing handle 2 can not cause obvious adverse effect on the holding feeling of the injector for local anesthesia; meanwhile, based on the relative position relationship between the pressing handle 2 and the medicine tube 11, the pressing state of the pressing handle 2 can be conveniently and quickly adjusted by fingers while the injector for local anesthesia is held, namely, the medicine injection state is adjusted; in addition, the pressing handle 2 and the hinge seat 10 actually form a labor-saving lever mechanism, and a small pressing force is applied to the middle front part of the pressing handle 2 by fingers, so that a large acting force can be applied to the push rod 7 by the stop ring 8, and the push rod 7 can be prevented from moving forwards in a labor-saving mode; in conclusion, the matching structure of the pressing handle 2 and the medicine tube 11 accords with human engineering, and the mechanical principle is scientific and reasonable, so that the injector for local anesthesia is more convenient and handy to use.

Further, in the injector for local anesthesia, a mounting groove 4 is formed at the rear end of the drug tube 11, and the stop ring 8 is limited in the mounting groove 4 and can move along with the rear end of the pressing handle 2; due to the arrangement of the arrangement groove 4, on one hand, the arrangement groove 4 can provide a certain limiting and guiding effect for the stop ring 8, the abutting effect between the stop ring 8 and the push rod 7 when the pressing handle 2 is pressed is improved, and the deformation degree of the stop ring 8 under stress is reduced; on the other hand, the stop ring 8 is accommodated in the accommodating groove 4, so that the local anesthetic syringe has a simpler and more compact appearance.

Further, in the above syringe for local anesthesia, the elastic sheath 3 is made of a rubber tube or a rubber band.

Further, in the above-mentioned syringe for local anesthesia, two side of the rear end of the drug tube 11 are connected with an ear-ring-shaped fixing ring 9; the elastic sleeve 3 is in a closed ring shape, surrounds the medicine tube 11 and the pressing handle 2 and penetrates through the two fixing rings 9; the hanging part 6 is a groove 61 arranged on two opposite side surfaces and the rear end surface of the push handle 5; the elastic sleeve 3 is made by fixedly connecting two ends by a rubber tube or a rubber band.

After the injector for local anesthesia adopts the design, the elastic sleeve 3 is sleeved outside the medicine tube 11 in the initial state, and the prior operations of medicine allocation, medicine extraction, air exhaust and the like cannot be hindered; when the elastic sleeve 3 is connected with the hanging part 6, the elastic sleeve 3 at one side of the pressing handle 2 is grabbed, the elastic sleeve 3 is stretched and is sleeved in the groove 61 of the pushing handle 5, and the operation is convenient and rapid; after the elastic sleeve 3 is arranged in the groove 61, the stretched elastic sleeve 3 is distributed on two sides of the push rod 7, so that the acting force applied by the elastic sleeve 3 to the push rod 7 can be ensured to be concentrated on the axial direction of the push rod 7; the elastic sleeve 3 is in a closed ring shape and penetrates through the two fixing rings 9, so that the elastic sleeve 3 has a longer length, and the elastic deformation of the elastic sleeve 3 tends to be integrally involved, thereby ensuring that the elastic sleeve 3 has a sufficient expansion range as a whole; on one hand, after the injector for local anesthesia finishes medicine suction, the artificial stretching elastic sleeve 3 can be sleeved on the hanging part 6, and on the other hand, the elastic sleeve 3 can be retracted to drive the push rod 7 to move forwards to the medicine to be exhausted.

Further, in the local anesthetic syringe, the plunger 7 is cylindrical, and the inner hole of the stopper ring 8 is circular; therefore, after the stop ring 8 is tightly attached to the push rod 7, the stop ring 8 and the push rod 7 have larger contact areas, so that the stop ring 8 can prevent the push rod 7 from moving forwards; in addition, the effect of the stop ring 8 on preventing the push rod 7 from moving forward can be further improved by increasing the friction coefficient of the contact surfaces of the stop ring 8 and the push rod 7.

Further, the push rod 7 and the push handle 5 are integrally formed; the hinged support 10 and the medicine tube 11 are integrally formed; the two fixing rings 9 and the medicine tube 11 are integrally formed.

Claims

1. An injector for local anesthesia comprises a medicine tube, a piston in sealing sliding fit with the medicine tube, and a push rod fixedly connected with the piston, wherein the front end of the medicine tube is provided with a joint for connecting a puncture needle, and the rear end of the push rod is provided with a push handle; the method is characterized in that: the rear end of the medicine tube is provided with a guide hole, and the push rod penetrates through the guide hole and is in sliding fit with the guide hole; the outer side of the medicine tube is provided with a pressing handle which is separated from the medicine tube and extends forwards and backwards, the middle rear part of the pressing handle is rotatably connected with a hinged support, the hinged support is fixed on the outer side of the rear end of the medicine tube, the rear end of the pressing handle is connected with a stop ring, and the stop ring is positioned on the rear side of the guide hole and sleeved outside the push rod; the middle front part of the pressing handle is pressed towards the direction of the medicine tube, and the inner side of the stop ring is tightly attached to the push rod to prevent the push rod from moving forwards; an elastic sleeve is fixed outside the medicine tube, and a hanging part matched with the elastic sleeve is arranged on the push handle; the elastic sleeve is in a stretching state after being connected with the hanging part, and the elastic sleeve can drive the push rod to move forwards through retraction, so that the medicine injection is realized.

2. The syringe for local anesthesia according to claim 1, wherein: the rear end of the medicine tube is provided with a placement groove, and the stop ring is limited in the placement groove and can move along with the rear end of the pressing handle.

3. The syringe for local anesthesia according to claim 1, wherein: the elastic sleeve is made of a rubber tube or a rubber band.

4. The syringe for local anesthesia according to claim 1, wherein: two sides of the rear end of the medicine tube are respectively connected with an ear-ring-shaped fixing ring; the elastic sleeve is in a closed ring shape, surrounds the outside of the medicine tube and the pressing handle and penetrates through the two fixing rings; the hanging part is a groove arranged on two opposite side surfaces and the rear end surface of the push handle.

5. The syringe for local anesthesia according to claim 4, wherein: the elastic sleeve is made by fixedly connecting two ends of a rubber tube or a rubber band.

6. The syringe for local anesthesia according to claim 4, wherein: the two fixing rings and the medicine tube are integrally formed.

7. The syringe for local anesthesia according to claim 1, wherein: the push rod is cylindrical, and the inner hole of the stop ring is circular.

8. The syringe for local anesthesia according to claim 1, wherein: the push rod and the push handle are integrally formed.

9. The syringe for local anesthesia according to claim 1, wherein: the hinged support and the medicine tube are integrally formed.