CN215386565U

CN215386565U - Improved structure of safety syringe

Info

Publication number: CN215386565U
Application number: CN202022602126.XU
Authority: CN
Inventors: 颜鸿洲
Original assignee: Individual
Current assignee: Yan Daxiu
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2022-01-04
Anticipated expiration: 2030-11-11

Abstract

The utility model provides an improved structure of a safe injection syringe, a protective sleeve is sleeved on the peripheral side of the syringe with a needle head, a medicine pushing component is combined at the tail part of the syringe, a convex block is arranged at the outer side of one end of the syringe close to the needle head, a guide chute which can be embedded with the convex block in a sliding way is axially arranged on the protective sleeve, a first positioning part which can slightly position the convex block in a spanning way is arranged at one end part of the guide chute close to the needle head, a second positioning part which can irreversibly position the convex block to prevent the convex block from moving back into the guide chute is arranged at one end part of the guide chute far away from the needle head, a side clamping part is transversely arranged at the side of the guide chute close to the second positioning part, a stopping convex part is arranged at the position of the side clamping part close to the guide chute, the protective sleeve can be slightly positioned by the side clamping part before use, so that the needle head can be retracted into the protective sleeve, and the first positioning part can temporarily position during injection, the second positioning part can prevent the needle from accidentally extending out of the protective sleeve to cause danger in the recovery process.

Description

Improved structure of safety syringe

Technical Field

The present invention relates to an improved structure of safety syringe, in particular, it relates to a structure of syringe which is suitable for being integrated with syringe needle (can not be disassembled), and can effectively isolate syringe needle before and after injection.

Background

In the prior common injection needles, in order to be transported or stored, a needle head and a needle cylinder are mostly separated to be transported or stored, and the needle head and the needle cylinder are combined when in use; however, since the strength of the general needle is poor and the needle is easily bent and damaged by external force, in practical application, a protective cap is mostly sleeved on the periphery of the needle, and the protective cap can protect the needle before injection and can also isolate the needle after injection so as to avoid infection caused by the fact that a medical worker is stabbed by the needle after use.

After the injection is finished, the used needle is still fixed at the front end of the needle cylinder, so that the puncture infection is easily caused by the fact that the needle cannot be aligned due to negligence in the process that a medical worker holds the needle cylinder and wants to cover the protective sleeve cap on the needle cylinder; therefore, various mechanisms for accommodating or isolating the used needle are directly arranged on the injection needle, a separate protective cap is not needed to be aligned and sleeved on the needle after injection, and the defect of infection caused by puncture can be effectively prevented.

In taiwan patent publication No. M289067, an improvement of a disposable safety injection syringe for anesthetic is disclosed, wherein a projection is disposed beside one end of a syringe, a safety protection sleeve is sleeved on the outer periphery of the syringe, a guiding groove is longitudinally disposed on the safety protection sleeve, and a rectangular slot defined by an isolation portion and a positioning slot extending transversely are sequentially disposed towards the center at one end of the guiding groove away from the projection.

When the syringe is stored, the convex block is positioned in the positioning groove, so that the safety protection sleeve keeps protruding outwards to isolate the end part of the syringe; when the safety syringe is used, the safety protective sleeve can be rotated to be separated from the positioning groove, so that the safety protective sleeve can be folded and slide towards the syringe, the needle head protrudes outwards, and then the needle head is combined with the end part of the syringe, so that the subsequent injection procedure can be conveniently carried out; after the injection is finished, the safety protection sleeve can be pulled out to enable the convex block to be embedded into the square clamping groove to form positioning, so that the safety protection sleeve keeps being sleeved on the outer periphery of the needle head to form isolation.

However, since the above-mentioned structure is designed for the needle structure which can be separated from the syringe, the needle must be assembled on the syringe before injection, which is inconvenient to use; moreover, an effective blocking mechanism is lacked between the positioning slot and the guiding slot, so that the bump is easy to slide into the guiding slot from the positioning slot, the safety protection sleeve is easy to slide outside the syringe, and the needle fixed on the syringe is likely to be exposed to the outside, thereby forming serious application defects.

In view of the above-mentioned disadvantages of the prior art safety syringe, the present invention is developed by the designers of the utility model aiming at the disadvantages.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an improved structure of a safe injection syringe, which is characterized in that a protective sleeve is sleeved outside the syringe with a needle head, a medicine pushing component is combined at the tail part of the syringe, a convex block is arranged at the outer side of one end of the syringe close to the needle head, a guide chute which can be embedded with the convex block in a sliding way is axially arranged in the protective sleeve, a first positioning part which can slightly position the convex block in a spanning way is arranged at one end part of the guide chute close to the needle head, a second positioning part which can irreversibly position strongly and prevent the convex block from moving back into the guide chute is arranged at one end part of the guide chute far away from the needle head, a side clamping part is transversely arranged at the side of the guide chute close to the second positioning part, a stopping convex part is arranged at the position of the side clamping part close to the guide chute, the stopping convex part can slightly and can prevent the convex block from entering the side clamping part in a spanning way or slide into the guide chute from the side clamping part, so that the protective sleeve can be slightly positioned by the side clamping part before use, the needle can be retracted into the protective sleeve, the first positioning part can provide temporary positioning for contracting the protective sleeve during injection, and the second positioning part can provide powerful positioning for recovering the needle cylinder and the needle in the protective sleeve after injection, so that the convenience in use can be improved, and the danger caused by the fact that the needle accidentally extends out of the protective sleeve in the recovery process can be avoided.

Another objective of the present invention is to provide an improved structure of a safety syringe, wherein the side of the guiding chute near the first positioning portion is provided with a side protrusion protruding inward to form a bidirectional local block for the protrusion to enter or exit the first positioning portion, and the side of the guiding chute near the second positioning portion is provided with an elastic oblique blocking portion protruding obliquely toward the second positioning portion to form a unidirectional strong block for the protrusion to easily enter the second positioning portion without being loosened outward, so as to prevent the protective sleeve from being loosened around the periphery of the needle after injection, thereby ensuring safety in use.

In order to achieve the above objects and effects, the technical means adopted by the present invention comprises: a needle head is arranged at one end of the needle cylinder, and a convex block is arranged on the outer side of one end of the needle cylinder close to the needle head; a protective sleeve slidably fitted around the outer periphery of the syringe, a guide slot axially extending and engaging with the protrusion is disposed on the protective sleeve, a first positioning portion capable of positioning the protrusion in a crossing manner is disposed at one end of the guide slot close to the needle, a second positioning portion irreversibly positioning the protrusion and preventing the protrusion from moving back into the guide slot is disposed at one end of the guide slot away from the needle, a lateral locking portion transversely extends laterally at a portion of the guide slot close to the second positioning portion, and the needle retracts into the protective sleeve when the protrusion is located at one of the second positioning portion and the lateral locking portion.

According to the above structure, the side locking portion is provided with a stopping protrusion capable of positioning the bump in a spanning manner at a position close to the guiding slot, so that the bump is limited when entering the side locking portion, and the bump is stopped from sliding into the guiding slot.

According to the above structure, a side of the guiding chute near the second positioning portion is provided with an elastic inclined blocking portion protruding obliquely toward the second positioning portion.

According to the above structure, at least one side of the guiding chute near the first positioning portion is provided with a convex side protrusion.

According to the structure, one end of the syringe far away from the needle head is combined with a medicine pushing assembly, the medicine pushing assembly is provided with a push rod which partially protrudes into the syringe, and the push rod can drive a connecting part to reciprocate in the syringe.

According to the above structure, the middle section of the push rod is sleeved with a push rod seat, the push rod seat is fixed at the end of the syringe by screwing, and the push rod seat is provided with a handle which is easy to hold by hand.

According to the structure, the needle head consists of an injection needle arranged outside the needle cylinder and a puncture needle which is convexly arranged towards the inside of the needle cylinder.

In summary, the improved structure of the safety syringe of the present invention can ensure that the injection needle is exposed when in use, and the outer peripheral side of the injection needle is sleeved with a protective sleeve before and after use to protect the injection needle and prevent the injection needle from being punctured and infected.

In order to make the aforementioned objects, functions and features of the present invention more comprehensible, several embodiments accompanied with figures are described below.

Drawings

Fig. 1 is an exploded perspective view of the present invention.

Fig. 2 is a perspective view of the present invention.

Fig. 3 is a schematic view showing the state of the present invention in which the outer periphery of the needle is blocked by the protective sleeve when stored.

Fig. 4 is a schematic view showing a state where the protection sleeve is rotated to separate the protrusion from the side catching portion before use of the present invention.

Fig. 5 is a schematic view of the injection state of the present invention.

Fig. 6 is a schematic view showing the state of the present invention in which the protection sleeve is blocked at the outer circumferential side of the needle by the protrusion blocked by the inclined blocking portion after the injection is completed.

Description of reference numerals: 1-a needle cylinder; 11-a needle head; 111-injection needle; 112-a needle; 12-a binding moiety; 13-a bump; 14-a window; 2-a drug pushing component; 20 a push rod; 21-a push rod seat; 22-a joint; 221-coupled portion; 23-a grip; 3-protecting the sleeve; 31-a guide chute; 311-a first positioning portion; 3111-a side protrusion; 312-a second location section; 3121-a slope stop; 32-side clamping part; 321-stop protrusions; 4-a medicament tube; 41-end plugs; 42-piston.

Detailed Description

Referring to fig. 1 and 2, it can be seen that the main structure of the present invention includes: a needle cylinder 1, a medicine pushing component 2 and a protective sleeve 3; wherein, two ends of the syringe 1 are respectively provided with a needle 11 and a combining part 12 (which can be an external thread), the needle 11 is provided with an injection needle 111 protruding outwards and a puncture needle 112 protruding towards the inside of the syringe 1, and the outside of the syringe 1 is provided with a convex block 13.

In a preferred embodiment, the protrusion 13 may be disposed at an end of the barrel 1 near the needle 11; and a window 14 is formed on the surface of the syringe 1 to allow the inside of the syringe to be seen.

The medicine pushing component 2 has a pushing rod seat 21 and a pushing rod 20 penetrating the pushing rod seat 21, the pushing rod seat 21 is provided with a handle 23 easy to hold by hand and a combined part 221 (which can be an internal thread), the combined part 221 (the internal thread) can be combined with the combining part 12 (the external thread) to form (screw) fixation, so that one end of the pushing rod 20 can protrude into the syringe 1 and is combined with a connecting part 22.

The protective sleeve 3 is slidably fitted around the outer periphery of the barrel 1, a guiding slot 31 extending axially and engaged with the protrusion 13 is disposed on the protective sleeve 3, a first positioning portion 311 capable of slightly limiting the protrusion 13 in a spanning manner is disposed at one end of the guiding slot 31 close to the needle 11, a second positioning portion 312 capable of irreversibly positioning the protrusion 13 in a strong manner is disposed at one end of the guiding slot 31 away from the needle 11, a lateral locking portion 32 is transversely disposed at one side of the guiding slot 31 close to the second positioning portion 312, and a stopping protrusion 321 is disposed at least one side of the lateral locking portion 32 close to the guiding slot 31, so as to slightly and crossly prevent the protrusion 13 from entering the lateral locking portion 32 or from sliding into the guiding slot 31 by the lateral locking portion 32.

In a practical embodiment, the guiding slot 31 is provided with protruding side protrusions 3111 at two sides near the first positioning portion 311, the protrusion 13 can pass through the side protrusions 3111 by appropriate force application, so that the protrusion 13 can form a slightly positioning effect in the first positioning portion 311 in a spanning manner; the guiding slot 31 is provided with an inclined stop portion 3121 protruding obliquely toward the second positioning portion 312 and having elasticity, and the inclined stop portion 3121 allows the protrusion 13 to enter the second positioning portion 312 in one direction, and forms an irreversible strong positioning that cannot be released outwards.

In practical application, a medicine tube 4 containing medicine therein can be accommodated in the syringe 1, and an end plug 41 is disposed at one end of the medicine tube 4 facing the injection needle 111 and can be pierced by the piercing needle 112, so that the medicine tube 4 is communicated with the injection needle 111; the end of the medicine tube 4 facing the medicine pushing component 2 is provided with a piston 42, and the piston 42 can be pushed by the connecting part 22 to press the medicine in the medicine tube 4, so that the medicine can be injected into the human body through the injection needle 111.

Referring to fig. 4 to 6, it can be seen that, when the syringe is stored, the protection sleeve 3 is pulled out toward the syringe 1, the protrusion 13 is embedded into the side locking portion 32, the protrusion 13 is slightly blocked by the stopping protrusion 321, so that the protrusion 13 cannot enter the guiding slot 31 through the stopping protrusion 321 without external force, and the protection sleeve 3 can protect the outer periphery of the injection needle 111 (as shown in fig. 3) to prevent the injection needle 111 from being damaged by external force or stabbing a carrier before storage or injection.

In use, the protection sleeve 3 can be rotated laterally to make the protrusion 13 enter the guiding slot 31 through the stopping protrusion 321, and then the protection sleeve 3 (as shown in fig. 4) is pushed to slide towards the drug pushing assembly 2 to be able to be accommodated on the outer periphery of the needle cylinder 1.

When the protective sleeve 3 is completely received on the outer periphery of the syringe 1, the protrusion 13 can slide along the guiding groove 31 and is inserted into the first positioning portion 311 through the side protrusion 3111, so as to form a position (as shown in fig. 5) for slightly positioning the injection needle 111 to protrude outwards, thereby facilitating the subsequent injection.

After the injection is completed, a force can be applied to pull out the protection sleeve 3 in a direction away from the medicine pushing assembly 2, and the protrusion 13 slides along the guiding chute 31, and is embedded into the second positioning portion 312 through the inclined blocking portion 3121, the protrusion 13 is irreversibly and strongly blocked by the inclined blocking portion 3121, so that the protrusion 13 cannot reversely enter the guiding chute 31, and the protection sleeve 3 can be fixed on the outer peripheral side of the injection needle 111 to form a barrier (as shown in fig. 6), thereby avoiding the occurrence of infection caused by the injection needle 111 accidentally stabbing a medical worker during the recovery process of the syringe 1 after use.

In summary, the improved structure of the safety syringe of the present invention can ensure that the injection needle is exposed when in use, and the outer peripheral side of the injection needle is sleeved with a protective sleeve before and after use to protect the injection needle and prevent the injection needle from being punctured and infected. The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. An improved structure of a safety syringe is characterized by at least comprising:

a needle head is arranged at one end of the needle cylinder, and a convex block is arranged on the outer side of one end of the needle cylinder close to the needle head;

a protective sleeve slidably fitted around the outer periphery of the syringe, a guide chute axially extending and capable of being fitted with the bump is provided on the protective sleeve, a first positioning portion capable of stridingly limiting the bump is provided at one end of the guide chute close to the needle, a second positioning portion irreversibly positioning the bump and preventing the bump from moving back into the guide chute is provided at one end of the guide chute away from the needle, a lateral clamping portion transversely extends laterally at a portion of the guide chute close to the second positioning portion, and the needle retracts into the protective sleeve when the bump is located at one of the second positioning portion and the lateral clamping portion.

2. The improved structure of a safety syringe as claimed in claim 1, wherein: the side clamping part is provided with a stopping convex part which can limit the lug in a spanning way at the position close to the guide sliding groove, so that the lug forms a limit when entering the side clamping part, and the lug is stopped from sliding into the guide sliding groove.

3. The improved structure of a safety syringe according to claim 1 or 2, wherein: one side of the guide chute close to the second positioning part is provided with an inclined blocking part which obliquely protrudes towards the second positioning part and has elasticity.

4. The improved structure of a safety syringe according to claim 1 or 2, wherein: at least one side of the guiding chute close to the first positioning part is provided with a convex side protrusion.

5. The improved structure of a safety syringe as claimed in claim 3, wherein: at least one side of the guiding chute close to the first positioning part is provided with a convex side protrusion.

6. The improved structure of a safety syringe according to claim 1 or 2, wherein: one end of the syringe far away from the needle head is combined with a medicine pushing component, the medicine pushing component is provided with a push rod which partially protrudes into the syringe, and the push rod can drive a connecting part to reciprocate in the syringe.

7. The improved structure of a safety syringe as claimed in claim 3, wherein: one end of the syringe far away from the needle head is combined with a medicine pushing component, the medicine pushing component is provided with a push rod which partially protrudes into the syringe, and the push rod can drive a connecting part to reciprocate in the syringe.

8. The improved structure of a safety syringe as claimed in claim 4, wherein: one end of the syringe far away from the needle head is combined with a medicine pushing component, the medicine pushing component is provided with a push rod which partially protrudes into the syringe, and the push rod can drive a connecting part to reciprocate in the syringe.

9. The improved structure of a safety syringe cylinder as claimed in claim 5, wherein: one end of the syringe far away from the needle head is combined with a medicine pushing component, the medicine pushing component is provided with a push rod which partially protrudes into the syringe, and the push rod can drive a connecting part to reciprocate in the syringe.

10. The improved structure of a safety syringe as claimed in claim 6, wherein: the middle section of the push rod is sleeved with a push rod seat, the push rod seat is fixed at the end part of the needle cylinder in a screwing mode, and a handle which is easy to hold by hand is arranged on the push rod seat.

11. The improved structure of a safety syringe as claimed in claim 7, wherein: the middle section of the push rod is sleeved with a push rod seat, the push rod seat is fixed at the end part of the needle cylinder in a screwing mode, and a handle which is easy to hold by hand is arranged on the push rod seat.

12. The improved structure of a safety syringe according to claim 8, wherein: the middle section of the push rod is sleeved with a push rod seat, the push rod seat is fixed at the end part of the needle cylinder in a screwing mode, and a handle which is easy to hold by hand is arranged on the push rod seat.

13. The improved structure of a safety syringe as claimed in claim 9, wherein: the middle section of the push rod is sleeved with a push rod seat, the push rod seat is fixed at the end part of the needle cylinder in a screwing mode, and a handle which is easy to hold by hand is arranged on the push rod seat.

14. The improved structure of a safety syringe according to claim 1 or 2, wherein: the needle head consists of an injection needle arranged outside the syringe and a puncture needle arranged towards the inside of the syringe in a protruding way.