CN215351254U

CN215351254U - Puncture-proof needleless cap injector

Info

Publication number: CN215351254U
Application number: CN202120204428.3U
Authority: CN
Inventors: 陈兆阅; 王鹏
Original assignee: Xiamen Hospital Zhongshan Hospital Fudan University
Current assignee: Xiamen Hospital Zhongshan Hospital Fudan University; Zhongshan Hospital Fudan University Xiamen Branch
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-12-31
Anticipated expiration: 2031-01-25

Abstract

The utility model provides a puncture-proof needle-cap-free injector capable of controlling injection depth, which comprises an injector and a transparent sleeve. The syringe is used for drawing the liquid medicine and injects the liquid medicine to the patient in vivo, and transparent sleeve cover is established outside the syringe, can follow the syringe axial slip to reach the effect of sheltering from the syringe needle. Be provided with the slider on the syringe, be provided with the spout on the transparent sleeve, through the slip of slider in the spout, realize the relative slip or fixed between syringe and the transparent sleeve, and then make the syringe needle indentation or stretch out the transparent sleeve, reach under the condition that does not need the needle cap and prevent thorn effect.

Description

Puncture-proof needleless cap injector

Technical Field

The utility model relates to the field of medical instruments, in particular to a puncture-proof needle-cap-free injector capable of controlling injection depth.

Background

A syringe is a common medical device, and existing syringes are equipped with a cap to prevent contamination of the syringe by the needle piercing through a sterile package during storage and transportation. When in use, medical care personnel need to pull out the needle cap firstly and insert the needle head into the ampoule bottle to extract the liquid medicine. After the liquid medicine is extracted, the injector is transferred to a patient body for injection, and in the transfer process, a needle head of the injector is exposed, so that the hidden danger of stabbing other people or medical care personnel exists, the hidden danger is easily polluted by bacteria, and the risk of infection of the patient is caused. After the injection, the needle head is pulled out, and the needle cap needs to be sleeved again, so that accidental puncture is easy to happen, and at the moment, if the patient suffers from infectious diseases such as AIDS, syphilis, hepatitis B and the like, the harm to medical staff is very serious.

In view of this, how to make the syringe effectively puncture-proof is a technical problem to be solved in the field.

SUMMERY OF THE UTILITY MODEL

The utility model provides a puncture-proof needle-cap-free injector capable of controlling injection depth, which aims to solve the problems that the existing injector is easy to puncture and the injection depth is uncontrollable.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a puncture resistant needleless cap injector comprising: the syringe comprises a syringe barrel, a needle head arranged at one end of the syringe barrel and a piston inner core capable of sliding in the syringe barrel; the transparent sleeve is sleeved outside the injector in a sliding manner, a sliding groove is formed in the transparent sleeve, and a sliding block which is matched with the sliding groove to slide is arranged on the needle cylinder;

the spout is for leading to the groove, the spout includes along the degree of depth groove that transparent sleeve axial set up and follows the spacing groove that transparent sleeve circumference set up, the spacing groove be located the degree of depth groove keep away from the one end of syringe needle and with degree of depth groove intercommunication, the syringe needle stretches out or retracts along with the relative slip of transparent sleeve and cylinder transparent sleeve.

Furthermore, the sliding block passes through the sliding groove and is partially exposed out of the transparent sleeve.

Further, the transparent sleeve is provided with length scales.

Further, the length scale is arranged at the side of the depth groove along the axial direction of the transparent sleeve, wherein the scale number of the length scale is gradually increased from zero scale along the direction close to the needle head.

Further, when the sliding block is positioned at the zero scale, the end part of the needle head is flush with the end part of the transparent sleeve.

Furthermore, the groove wall of the limiting groove is provided with an elastic strip, the groove width of the limiting groove is smaller than the outer diameter of the sliding block, and the groove width of the depth groove is larger than the outer diameter of the sliding block.

Furthermore, the end part of the sliding block, which is exposed out of the transparent sleeve, is sleeved with a colored rubber sleeve.

Further, the end of the transparent sleeve near the skin of the patient is ported in a circular or elliptical shape.

Further, the slide block is positioned at one end of the needle cylinder close to the needle head.

Further, the end part of the transparent sleeve close to the needle head is provided with a reversible barrel cap.

Compared with the prior art, the utility model has the following beneficial effects:

(1) the injector comprises the injector and the transparent sleeve, the sliding block is arranged on the injector, the sliding groove is arranged on the transparent sleeve, relative sliding or fixing between the injector and the transparent sleeve is realized through sliding of the sliding block in the sliding groove, so that the needle head retracts into or extends out of the transparent sleeve, and the puncture-proof effect is achieved under the condition that a needle cap is not needed.

(2) According to the utility model, the sliding block penetrates through the sliding groove, part of the sliding block is exposed out of the transparent sleeve, the outer wall of the transparent sleeve positioned in the depth groove is pinched by fingers, and when the needle head downwards punctures skin, the needle cylinder slides to the finger along with the sliding block and is blocked to stop, so that the depth of puncturing the skin is controllable through the matching of the fingers and the sliding block.

(3) The transparent sleeve is provided with the length scales, so that the extending length of the needle head can be known more accurately when the sliding block slides in the depth groove. The length scale sets up the avris at the degree of depth groove, and the number of graduations of length scale increases from zero scale along medicine injection advancing direction gradually, and the tip of syringe needle is level at ordinary times with transparent telescopic tip, and the slider is located zero scale department. The position of the sliding block is the length of the needle head extending out of the transparent sleeve, and the needle head is very visual and is easy to operate.

(4) The groove wall of the limiting groove is provided with the elastic strip, the groove width of the limiting groove is smaller than the outer diameter of the sliding block, and the groove width of the depth groove is larger than the outer diameter of the sliding block, so that the sliding block can be fixed in the limiting groove, the transparent sleeve and the injector are fixed, the sliding block can slide in the depth groove without obstruction, the obstruction to the needle inserting process of medical personnel is avoided, and the sliding block can slide in the limiting groove by extruding the elastic strip. Deformation that the elastic strip produced produces certain resistance to the slider, and this resistance can prevent effectively that the relative cylinder of transparent sleeve from random rotating, and under the condition that does not have external force to rotate the cylinder, the slider can be effectual spacing in spacingly, realizes the locking of transparent sleeve and syringe.

(5) The sliding block is positioned at one end of the needle cylinder close to the needle head, so that the length of the transparent sleeve is as short as possible, and the transparent sleeve is prevented from blocking the operation of the injector.

(6) The port of one end of the transparent sleeve close to the skin of the patient is vertical or inclined to the axial direction, namely when the port of the transparent sleeve is propped against the skin of the patient, the needle head and the skin can be vertical or inclined, and different requirements of vertical penetration or inclined penetration are met.

Drawings

Fig. 1 is a view showing a state of use of a conventional syringe.

Fig. 2 is a structural diagram of a puncture-proof needle-free cap injector capable of controlling an injection depth according to an embodiment of the present invention.

Fig. 3 is an assembly view of a puncture-proof needleless cap injector with controllable injection depth according to an embodiment of the present invention.

Fig. 4 is an assembly view of a puncture-proof needleless cap injector capable of controlling an injection depth according to still another embodiment of the present invention.

Fig. 5 is an assembly view of a slider and a chute according to another embodiment of the present invention.

Fig. 6 is a diagram illustrating the operation of the needle-free syringe with a puncture-proof function for controlling the injection depth according to the embodiment of the present invention.

Illustration of the drawings:

1-ampoule bottle;

10-a syringe; 11-a syringe; 12-a needle head; 13-a piston inner core; 14-slide block, 15-rubber sleeve;

20-a transparent sleeve; 21-a chute; 211-deep trenches; 212-a limiting groove; 213-an elastic strip; 22-graduation; 23-cartridge cap.

Detailed Description

The present invention is further illustrated by the following figures and examples, which include, but are not limited to, the following examples.

Referring to fig. 1, a conventional syringe 10 includes a barrel 11, a needle 12 and a plunger 13, and an outer packing bag of the syringe 10 is opened, a needle cap (not shown) is removed, and the needle 12 is inserted into an ampoule bottle 1 to draw a liquid medicine. In the process of pulling out the needle cap and inserting the needle cap into the ampoule bottle 1, the user or other people are easy to be stabbed, the liquid medicine is taken out, the injector is transferred to the body of a patient, the stabbed risk is easy to occur again, the exposed needle head has the risk of infecting bacteria, and meanwhile, when the injection is carried out, the patient, particularly an infant patient, avoids shaking behaviors, and causes the deviation of the injection position and the injection depth.

Therefore, the utility model provides a new scheme to solve the problems that the existing injector has puncture risks and the deviation of the injection position and the injection depth.

For a more clear presentation, the utility model is described in detail below with reference to the accompanying drawings.

Example one

Referring to fig. 2 and 3, a puncture-proof needleless cap injector capable of controlling an injection depth comprises an injector 10 and a transparent sleeve 20. The syringe 10 is identical to the existing syringe in structure and usage, and comprises a syringe 11, a needle 12 and a piston inner core 13, and is used for drawing liquid medicine and injecting the liquid medicine into a patient. The transparent sleeve 20 is sleeved outside the injector 10 and can axially slide along the needle cylinder 11, so as to achieve the effect of shielding the needle head 12.

In order to facilitate the assembly of the transparent sleeve 20 and the injector 10, a sliding block 14 is disposed on the outer wall of the needle cylinder 11, a sliding slot 21 is correspondingly disposed on the transparent sleeve 20, and the sliding block 14 slides in the sliding slot 21, so as to drive the injector 10 to slide in and out relative to the transparent sleeve 20, thereby enabling the needle 12 to retract into or extend out of the transparent sleeve 20.

The sliding groove 21 is a through groove formed in the side wall of the transparent sleeve 20, and includes a depth groove 211 axially arranged along the transparent sleeve, and a limit groove 212 arranged along the circumferential direction of the needle cylinder 11 and communicating with one end of the depth groove 211 far away from the needle head 12. The sliding of the slider 14 within the depth slot 211 causes the syringe 10 to slide axially, thereby changing the length of the needle 12 extending out of the transparent sleeve 20. The syringe 10 is rotated so that the slider 14 slides within the retaining groove 212, thereby locking the syringe 10 with the transparent sleeve 20. It will be appreciated that the length of the depth groove 211 is greater than the length of the needle 12, such that when the slider 14 is slid to the end of the depth groove 211 near the retaining groove 212, the needle 12 may be fully concealed within the transparent sleeve 20, and when the slider 14 is slid to the end of the depth groove 211 away from the retaining groove 212, the needle 12 may be fully extended out of the transparent sleeve 20.

The sliding block 14 passes through the sliding groove 21, and part of the sliding block 14 is exposed out of the transparent sleeve 20, when in use, the finger is placed at a certain position of the depth groove, and the sliding block 14 stops at the position blocked by the finger in the sliding process, so that the sliding distance of the injector 10 can be controlled, and the injection depth can be controlled.

The transparent sleeve is provided with a length scale 22 to allow the length of the extended needle 12 to be known more accurately as the slider 14 slides within the depth slot 211. The length scale 22 is provided at the side of the depth groove 211, wherein the scale number of the length scale 22 is gradually increased from zero scale along the advancing direction of the medicine injection, and the slider 14 is located at the zero scale when the end of the needle 12 is flush with the end of the transparent sleeve 20. The position of the sliding block 14 is the length of the needle 12 extending out of the transparent sleeve 20, which is very intuitive and easy to operate.

The tip cover that slider 14 exposes transparent sleeve 20 is equipped with rubber sleeve 15, strengthens the stopping of finger to slider 14, reduces the impact to the finger when slider 14 collides with the finger simultaneously, and rubber sleeve 15 sets up to the colour for the length that syringe needle 12 pierces the skin is more striking.

The slider 14 is located at the end of the barrel 11 adjacent the needle 12 so that the length of the transparent sleeve 20 is as short as possible to avoid the transparent sleeve 20 obstructing the operation of the syringe 10.

The end of the transparent sleeve 20 adjacent the needle 12 may also be provided with a reversible cap 23 to further reduce contact of the needle with the environment and reduce the risk of infection.

Example two

Referring to fig. 4, the difference between the injector of this embodiment and the injector of the first embodiment is that in this embodiment, the port at the end of the transparent sleeve close to the skin of the patient is elliptical, i.e. the port is not perpendicular to the axial direction of the transparent sleeve, and when the port is pressed against the skin of the patient, the included angle between the whole injector and the skin of the patient is less than 90 degrees, i.e. the injector is inclined, so that the needle 12 can penetrate into the skin obliquely.

EXAMPLE III

The difference between the syringe of this embodiment and the syringes of the first and second embodiments is that in this embodiment, the groove wall of the limiting groove 212 is provided with the elastic strip 213, the groove width of the limiting groove 212 is smaller than the diameter of the slider 14, and the groove width of the depth groove 211 is larger than the diameter of the slider 14. The sliding block 14 can slide in the depth groove 211 without obstruction, so that the obstruction to the needle inserting process of the medical staff is avoided. The sliding block 14 is arranged in the limiting groove 212, the elastic strip 213 can slide by being extruded, the deformation generated by the elastic strip 213 generates certain resistance to the sliding block 14, the resistance can effectively prevent the transparent sleeve 20 from rotating randomly relative to the needle cylinder 11, and under the condition that the needle cylinder 11 is rotated without external force, the sliding block 14 can be effectively limited in the limiting groove 212, so that the transparent sleeve 20 and the injector 10 are locked.

Referring to fig. 5, the initial position of the slider 14 is located in the limit groove 212 and the needle is fully retracted into the transparent sleeve 20 when the pack is used with the puncture-resistant capless syringe having controlled injection depth. The staff takes out the syringe, rotatory syringe 10, and slider 14 roll-off spacing groove 212 gets into degree of depth groove 211 to slide to the one end of keeping away from spacing groove 212 in degree of depth groove 211, after the extraction liquid medicine, slider 14 returns initial position, and syringe needle 12 is whole to be retracted in transparent sleeve 20, prevents to stab and bacterial infection, and the syringe shifts to patient department.

The injector is adjusted to a state, the sliding block 14 is fixed in the limiting groove 212, the needle head 12 is completely retracted into the transparent sleeve 20, the end part of the transparent sleeve 20 is propped against the position to be injected, and the transparent sleeve 20 is positioned at the injection position. The syringe is then adjusted to position b, the transparent sleeve 20 is secured in one hand, the syringe 10 is rotated in the other hand, and the slider 14 is adjusted to the end of the depth groove 211, at which time the finger (e.g., thumb) of the hand securing the transparent sleeve 20 is placed on the desired scale. Then the injector is adjusted to the state c, the syringe 11 is held to slide in the depth groove 211 until the sliding block is blocked by fingers, and the syringe stays at the finger placing position, and the scale value of the finger pressing position is the depth of the needle head 12 penetrating into the skin, so that the controllable injection depth is realized. Finally, the piston inner core is pushed to inject the medicine into the body of the patient. After the injection, the needle 12 is retracted into the transparent sleeve 20 and is fixed by sliding the sliding block 14 into the limiting groove 212, so that the risk of puncture injury on the needle cap on the sleeve is avoided.

According to the syringe, the transparent sleeve covers the needle head of the syringe, so that the phenomenon that the medicine is transferred to a patient after being extracted and accidentally stabs the patient or other people is effectively avoided, and the risks of infection of the patient and infection of the patient are prevented. Meanwhile, the injection position is positioned through the transparent sleeve 20, and the injection depth is controllable through the cooperation of the fingers, the sliding block 14 and the length scales 22. The injector of the utility model has the advantages of simple structure, convenient use, low cost and higher practicability.

The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, but all changes that can be made by applying the principles of the present invention and performing non-inventive work on the basis of the principles shall fall within the scope of the present invention.

Claims

1. A puncture-resistant, needleless cap injector, comprising: the syringe comprises a syringe barrel, a needle head arranged at one end of the syringe barrel and a piston inner core capable of sliding in the syringe barrel; the transparent sleeve is sleeved outside the injector in a sliding manner, a sliding groove is formed in the transparent sleeve, and a sliding block which is matched with the sliding groove to slide is arranged on the needle cylinder;

2. A puncture-resistant and needleless cap injector as in claim 1, wherein the slide passes through the slide slot and is partially exposed from the transparent sleeve.

3. A puncture and needlefree injector as claimed in claim 2, in which the transparent sleeve is provided with length scales.

4. A puncture-resistant and needleless cap injector as claimed in claim 3, wherein the length scale is disposed at the side of the depth groove in the axial direction of the transparent sleeve, and wherein the scale number of the length scale is gradually increased from zero scale in the direction approaching the needle.

5. A puncture and needlefree syringe as claimed in claim 4, in which the end of the needle is flush with the end of the transparent sleeve when the slider is at zero scale.

6. The puncture-proof needleless cap injector of claim 1, wherein the groove wall of the limit groove is provided with an elastic strip, the groove width of the limit groove is smaller than the outer diameter of the slide block, and the groove width of the depth groove is larger than the outer diameter of the slide block.

7. A puncture-proof and needleless cap injector as claimed in claim 2, wherein the end of the slider exposed out of the transparent sleeve is sleeved with a colored rubber sleeve.

8. A puncture-resistant and needle-free syringe as claimed in any one of claims 1 to 7, wherein the slider is located at the end of the barrel adjacent to the needle.

9. A puncture and needle-free cap injector as claimed in claim 8, wherein the port at the end of the transparent sleeve near the skin of the patient is perpendicular or inclined to the axial direction.

10. A puncture and needlefree injector as claimed in claim 9, in which the end of the transparent sleeve adjacent the needle is provided with a reversible cap.