CN211327470U

CN211327470U - Injector for intramuscular injection

Info

Publication number: CN211327470U
Application number: CN201922489447.0U
Authority: CN
Inventors: 刘伟; 王若宁
Original assignee: China Japan Friendship Hospital
Current assignee: China Japan Friendship Hospital
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-08-25
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to the technical field of injectors, in particular to an injector for intramuscular injection, which comprises a needle cylinder, a needle head, a piston rod and a sleeve, wherein the piston is fixed at the end part of the piston rod, the piston and the piston rod are arranged inside the needle cylinder, the needle head is arranged at the end part of the needle cylinder, one end of the sleeve is provided with an opening, the other end of the sleeve is provided with a small hole, the needle cylinder is arranged in the sleeve in a sliding way so that the needle head can extend out of the small hole, a locking device is arranged between the needle cylinder and the sleeve, the injector can be used, the condition that the needle head is inserted too deeply or the needle head is inserted too shallowly into a patient can be reduced by adjusting the length of the needle head extending out of the sleeve, the discomfort of the patient caused by the too deep or too, the health of the patient is guaranteed.

Description

Injector for intramuscular injection

Technical Field

The utility model relates to the technical field of injectors, in particular to an injector for intramuscular injection.

Background

Injection, which means that a medical device such as an injector is used to inject liquid into a human body so as to achieve the purposes of diagnosing, treating and preventing diseases. The injection site, angle and depth are required to be different according to different injection purposes and types.

Because the length of the needle head of the injector cannot be changed, the medical staff cannot control the injection depth accurately when the injection operation is performed. Generally, the injection depth is judged according to the experience of medical staff, so that irregular injection is easy to occur; in addition, due to the gradual increase of chronic diseases in recent years, more and more patients adopt the situation that self or family members inject medicines to themselves, and in addition, the accuracy of injection is difficult to ensure; meanwhile, because the obesity degrees of the patients are different, the length of the needle inserted into the human body is also different, the phenomenon that the liquid medicine is not injected into the muscle of the fat patient can occur, or the phenomenon that the needle is inserted into the muscle of the thin patient to cause the discomfort of the thin patient can occur. These injection irregularities can affect the therapeutic efficacy of the drug and increase the incidence of disease and infection at the injection site.

The syringe hand is straight in operation at present syringe, and is shorter, can't realize one-hand operation basically in the injection operation in-process, when the syringe needle pricks into the human body, need withdraw the liquid medicine earlier, see whether there is blood return, there is blood return to prove that the syringe needle has pierced through the blood vessel, the medicine of injection is because concentration is great, can cause harmful effects in directly getting into the blood vessel, however in the actual operation in-process, because we often need one hand to hand the syringe, the piston rod is hand-held to the other hand and is withdrawn, whether there is blood return, this makes the injection process complicated and troublesome, nurse's intensity of labour has been improved.

Disclosure of Invention

The invention of the utility model aims to: the length of the needle head of the injector cannot be changed in the prior art, when medical staff injects medicine to a patient, the length of the needle head inserted into the patient body is mainly judged according to the level of the medical staff, so that the situation that the needle head is inserted too deeply or the needle head is inserted too shallowly possibly exists in part of the patients, and the injector for intramuscular injection is provided.

In order to realize the purpose, the utility model discloses a technical scheme be:

the utility model provides an injector for intramuscular injection, includes cylinder, syringe needle, piston rod and sleeve, the piston with the end fixing of piston rod, piston and piston rod set up inside the cylinder, the syringe needle sets up the tip of cylinder, sleeve one end is provided with the opening, the sleeve other end is provided with the aperture, the cylinder slides and sets up make in the sleeve the syringe needle can stretch out the aperture, the cylinder with be provided with locking device between the sleeve.

As the utility model discloses an optimal scheme, the outer wall of cylinder is provided with a plurality of draw-in grooves in the axial, telescopic inner wall be provided with the buckle that the draw-in groove matches, the draw-in groove with the buckle cooperation is constituteed locking means, medical personnel are through rotating the cylinder inside the sleeve for the buckle leaves mutually with the draw-in groove, through the axial displacement cylinder, treats that the syringe needle stretches out telescopic length when suitable, through rotating the cylinder, through the cooperation of buckle with the draw-in groove, makes cylinder and sleeve locking, the relative sleeve axial displacement's of cylinder phenomenon can not appear.

As the utility model discloses an optimized scheme, the draw-in groove is the U-shaped groove, the buckle be with the inserted bar that the U-shaped groove matches for the cylinder can realize the locking through U-shaped groove and inserted bar cooperation with the sleeve, and make inserted bar and U-shaped groove separation through rotating the cylinder, cylinder axial displacement can make inserted bar and other U-shaped groove cooperations, thereby realizes adjusting the syringe needle and stretch out telescopic length.

As the utility model discloses an optimal scheme, the draw-in groove is the bell jar, the buckle with the toper pole that the bell jar matches for the cylinder can realize the locking through the cooperation of bell jar with the toper pole with the sleeve, and make toper pole and bell jar separation through rotating the cylinder, cylinder axial displacement can make toper pole and other toper groove cooperations, thereby realizes adjusting the syringe needle and stretches out telescopic length.

As the utility model discloses an optimal scheme, telescopic inner wall is provided with a plurality of draw-in grooves in the axial, be provided with on the outer wall of cylinder with the buckle that the draw-in groove matches, the draw-in groove with the buckle is constituteed locking means, medical personnel are through rotating the cylinder inside the sleeve for the buckle leaves with the draw-in groove mutually, through the axial displacement cylinder, treats that the syringe needle stretches out telescopic length when suitable, through rotating the cylinder, through the cooperation of buckle with the draw-in groove, makes cylinder and sleeve locking, the relative sleeve axial displacement's of cylinder phenomenon can not appear.

As the utility model discloses an optimal scheme, the cylinder outer wall is provided with the external screw thread, the sleeve inner wall be provided with the internal thread that the external screw thread matches, the external screw thread with interior screw-thread fit constitutes locking means, cylinder and sleeve pass through threaded connection for the cylinder can relative sleeve axial displacement, and cylinder and telescopic locking can be realized in the cooperation of screw thread, and thread structure has realized two functions for syringe simple structure.

As the utility model discloses a preferred scheme, telescopic outside is provided with two handles, two the handle is relative telescopic axis symmetry, medical personnel are when carrying out the injection, and the tip of piston rod is held to the thumb pressure, and forefinger and middle finger are put and are borrowed the power on two handles for can accomplish the injection fast.

As the utility model discloses a preferred scheme, be provided with the lantern ring on the handle, keeping away from of piston rod piston one end is provided with the lantern ring, and thumb, forefinger and middle finger all place in the lantern ring, and after the syringe needle inserted the injection position, whether blood return was observed to the mode that singlehanded accessible thumb was retrieved for the operation of blood return just can be accomplished to the singlehanded, has reduced medical personnel's intensity of labour.

As the utility model discloses an optimal scheme, being close to of handle syringe needle one side is provided with the arc recess, forefinger and middle finger and arc recess contact, and the structure of arc recess is similar with finger structure, has improved doctor-patient personnel's travelling comfort.

As the preferred proposal of the utility model, the sleeve and the needle cylinder are made of medical transparent materials, the needle cylinder is provided with volume scales, and the medical transparent materials are PVC.

As the utility model discloses a preferred scheme, telescopic keeping away from opening one end sets up to the toper, the aperture sets up the telescopic middle part of toper.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the sleeve is arranged outside the needle cylinder of the traditional injector, the needle cylinder is arranged in the sleeve in a sliding mode, medical staff can adjust the length of the needle head extending out of the sleeve according to the specific situation of a patient, then the needle cylinder is fixed with the sleeve through the locking device, the injector can be used, the length of the sleeve can be extended out through the adjustable needle head, the situation that the needle head is too deep or the needle head is too shallow to be inserted into a patient can be reduced, discomfort caused by too deep or too shallow insertion of the needle head into the patient is avoided, the probability of illness and infection of the injection part of the patient is avoided, and the physical health of the patient is guaranteed.

2. Because present syringe all need abandon after using up through returning the cap again, medical personnel are fixing the helmet in syringe needle department, because the syringe needle is too little and individual negligence etc, easily cause back the cap failure, medical personnel are by the condition of acupuncture, cause medical personnel's infection, through this scheme, after the injection finishes, the cylinder slides in the sleeve makes the syringe needle all get into the sleeve, rethread locking device locking, make can avoid medical personnel by the condition of acupuncture, the phenomenon that medical personnel were infected has been avoided.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a perspective view taken along the line A in FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 4 is an enlarged view at C of FIG. 3;

FIG. 5 is a cross-sectional view of an alternative structure B-B of FIG. 2;

FIG. 6 is an enlarged view taken at D in FIG. 5;

the labels in the figure are: 1-syringe, 2-needle, 3-piston, 4-piston rod, 5-sleeve, 6-opening, 7-small hole, 8-locking device, 9-clamping groove, 10-buckle, 13-handle, 14-lantern ring, 15-arc groove and 16-volume scale.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1

As shown in fig. 1-6, an injector for intramuscular injection comprises a needle cylinder 1, a needle 2, a piston 3, a piston rod 4 and a sleeve 5, wherein the piston 3 is fixed to the end of the piston rod 4, the piston 3 and the piston rod 4 are arranged inside the needle cylinder 1, the needle 2 is arranged at the end of the needle cylinder 1, one end of the sleeve 5 is provided with an opening 6, the other end of the sleeve 5 is provided with a small hole 7, the needle cylinder 1 is slidably arranged in the sleeve 5 so that the needle 2 can extend out of the small hole 7, and a locking device 8 is arranged between the needle cylinder 1 and the sleeve 5.

As shown in fig. 3 and 4, the outer wall of the needle cylinder 1 is provided with a plurality of clamping grooves 9 in the axial direction, the inner wall of the sleeve 5 is provided with a buckle 10 matched with the clamping groove 9, the clamping groove 9 is matched with the buckle 10 to form the locking device 8, the clamping groove 9 is a U-shaped groove, the buckle 10 is an inserted link matched with the U-shaped groove, so that the needle cylinder and the sleeve can be locked through the matching of the U-shaped groove and the inserted link, the inserted link is separated from the U-shaped groove by rotating the needle cylinder, and the inserted link can be matched with other U-shaped grooves by the axial movement of the needle cylinder, thereby realizing the adjustment of the length of the needle extending out.

In addition to the above-described structure in which the locking groove is a U-shaped groove, as shown in fig. 5 and 6, the locking groove 9 is a tapered groove, and the latch 10 is a tapered rod that mates with the tapered groove.

As shown in fig. 1, the outside of sleeve 5 is provided with two handles 13, two handles 13 are relative the axis symmetry of sleeve 5, be provided with lantern ring 14 on handle 13, keeping away from of piston rod 4 piston 3 one end is provided with lantern ring 14, being close to of handle 13 syringe 2 one side is provided with the arc recess, sleeve 5 with syringe 1 is medical transparent material, be provided with volume scale 16 on syringe 1, medical transparent material is PVC, sleeve 5 keep away from opening 6 one end sets up to the toper, aperture 7 sets up the middle part of toper sleeve 5.

Example 2

In this embodiment, the inner wall of the sleeve 5 is provided with a plurality of slots 9 in the axial direction, the outer wall of the needle cylinder 1 is provided with a buckle 10 matched with the slots 9, the slots 9 and the buckle 10 form the locking device 8, and the rest of the structure is the same as that of embodiment 1.

Example 3

In this embodiment, the outer wall of the needle cylinder 1 is provided with an external thread, the inner wall of the sleeve 5 is provided with an internal thread matched with the external thread, the external thread and the internal thread are matched to form the locking device 8, and the rest structures are the same as those of embodiment 1.

The specific working process of the application is as follows: medical personnel is when injecing the patient, through sliding needle cylinder 1 on sleeve 5 for can adjust the length that syringe needle 2 stretches out sleeve 5's aperture 7, make the length of syringe needle 2 can adapt to the patient of different physiques (fat or thin), after the injection finishes, continue to slide syringe 1 on sleeve 5, make syringe needle 2 all retrieve to sleeve 5 in, avoid medical personnel by the condition of needle prick, avoid medical personnel by the phenomenon of infection.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an injector for intramuscular injection, characterized in that, includes cylinder (1), syringe needle (2), piston (3), piston rod (4) and sleeve (5), piston (3) with the end fixing of piston rod (4), piston (3) and piston rod (4) set up inside cylinder (1), syringe needle (2) set up the tip of cylinder (1), sleeve (5) one end is provided with opening (6), the sleeve (5) other end is provided with aperture (7), cylinder (1) slide to set up make in sleeve (5) syringe needle (2) can stretch out aperture (7), cylinder (1) with be provided with locking device (8) between sleeve (5).

2. Syringe for intramuscular injection according to claim 1 wherein the outer wall of the barrel (1) is provided with a plurality of slots (9) in the axial direction and the inner wall of the sleeve (5) is provided with catches (10) matching the slots (9), the slots (9) cooperating with the catches (10) to constitute the locking means (8).

3. Syringe for intramuscular injection according to claim 2 wherein the notch (9) is a U-shaped slot and the catch (10) is a bayonet mating with the U-shaped slot.

4. Syringe for intramuscular injection according to claim 2 wherein the notch (9) is a conical groove and the catch (10) is a conical rod matching the conical groove.

5. Syringe for intramuscular injection according to claim 1 wherein the inner wall of the sleeve (5) is provided with a plurality of slots (9) in the axial direction and the outer wall of the needle cylinder (1) is provided with a catch (10) matching the slots (9), the slots (9) and the catch (10) constituting the locking means (8).

6. Syringe for intramuscular injection according to claim 1 characterized in that the outer wall of the barrel (1) is provided with an external thread and the inner wall of the sleeve (5) is provided with an internal thread matching the external thread, the external thread cooperating with the internal thread to constitute the locking means (8).

7. Syringe for intramuscular injection according to claim 1 characterized in that the outside of the sleeve (5) is provided with two handles (13), the two handles (13) being symmetrical with respect to the axis of the sleeve (5).

8. Syringe for intramuscular injection according to claim 7 wherein a collar (14) is provided on the handle (13) and a collar (14) is provided on the end of the piston rod (4) remote from the piston (3).

9. Syringe for intramuscular injection according to claim 7 wherein the handle (13) is provided with an arc-shaped groove on the side close to the needle (2).

10. Injector for intramuscular injection according to claim 1 wherein the sleeve (5) and the barrel (1) are both of transparent medical material, the barrel (1) being provided with volume scales (16).