CN219208475U

CN219208475U - Closed syringe

Info

Publication number: CN219208475U
Application number: CN202223471719.2U
Authority: CN
Inventors: 陈海英
Original assignee: Shanghai Kaile Infusion Set Factory Co ltd
Current assignee: Shanghai Kaile Infusion Set Factory Co ltd
Priority date: 2022-12-24
Filing date: 2022-12-24
Publication date: 2023-06-20
Anticipated expiration: 2032-12-24

Abstract

The application relates to a closed injector, which belongs to the field of medical appliances and comprises a needle cylinder, a push rod, a needle head and a protective cylinder, wherein the push rod is arranged in the needle cylinder in a sliding way, a piston head is arranged at one end of the push rod, which is close to the needle cylinder, a push plate is arranged at one end of the push rod, which is far away from the needle cylinder, the protective cylinder is arranged on the needle cylinder in a sliding way, and one end, which is far away from the needle cylinder, of the protective cylinder is connected with the push plate; the needle is communicated with the needle cylinder. When medical staff draws the liquid medicine, the push plate is moved to one end far away from the needle cylinder, and the push plate drives the push rod and the protective cylinder to synchronously move; when medical personnel pours into the liquid medicine, to being close to the one end of cylinder pushing push pedal, push pedal drive push rod and protection section of thick bamboo synchronous movement, whole injection process, protection section of thick bamboo is including the push rod protection all the time, prevents medical personnel's hand and push rod contact, and prevents outside bacterium adhesion to the push rod on, effectively improves medical personnel and uses the easy contaminated problem of liquid medicine of leading to of syringe injection's process.

Description

Closed syringe

Technical Field

The present application relates to the field of medical devices, and in particular to a closed syringe.

Background

A syringe is a common medical device, and is mainly used for extracting or injecting gas or liquid by a needle, wherein the process of extracting and injecting gas or liquid by the needle is called injection, and the syringe consists of a needle cylinder with a small hole at the front end and a matched piston core rod, so as to inject a small amount of liquid or the liquid into areas inaccessible to other methods or extract the liquid or the liquid from places, wherein the liquid or the gas is sucked from the small hole at the front end of the needle cylinder when the core rod is pulled out, and the liquid or the gas is extruded when the core rod is pushed in.

With respect to the above-described related art, the inventors found that there are the following drawbacks: when medical staff extracts liquid medicine by using the injector, the piston core rod is required to be extracted from the needle cylinder, but when the piston core rod is extracted, hands of staff easily touch the piston core rod, bacteria are easily adhered to the piston core rod when the piston core rod is exposed to air after the piston core rod is extracted, and after the medical staff extracts the liquid medicine, the bacteria enter the needle cylinder along with the piston core rod when the piston core rod is pushed into the needle cylinder for injection, so that the liquid medicine in the needle cylinder is easily polluted.

Disclosure of Invention

In order to solve the problem that medical staff is easy to cause pollution to liquid medicine in the injection process of the syringe, the application provides a closed syringe.

The application provides a closed syringe adopts following technical scheme:

the closed injector comprises a needle cylinder, a push rod, a needle head and a protective cylinder, wherein the needle cylinder is hollow and is provided with an opening at one end, the push rod is arranged in the needle cylinder in a sliding manner, a piston head for increasing the tightness between the push rod and the inner side wall of the needle cylinder is arranged at one end, close to the needle cylinder, of the push rod, a push plate is arranged at one end, far away from the needle cylinder, of the push rod, the protective cylinder is arranged on the outer side wall of the needle cylinder in a sliding manner, and one end, far away from the needle cylinder, of the protective cylinder is connected with the push plate; the needle head is communicated with one end of the needle cylinder far away from the push rod.

By adopting the technical scheme, when medical staff extracts the liquid medicine, the needle head is inserted into the liquid medicine, then the push plate is moved to one end far away from the needle cylinder, and the push plate drives the push rod and the protective cylinder to synchronously move to one end far away from the needle cylinder, so that the liquid medicine is extracted into the needle cylinder; when medical personnel pours into the liquid medicine, to being close to the one end of cylinder and promote the push pedal, the push pedal drives push rod and protection section of thick bamboo and removes to being close to the one end of cylinder in step to pour into the liquid medicine in the cylinder into the receptor through the syringe needle, whole injection process, protection section of thick bamboo is including the push rod protection all the time, prevents medical personnel's hand and push rod contact, and prevents outside bacterium adhesion to on the push rod, effectively improves medical personnel and uses the easy contaminated problem of liquid medicine of leading to of syringe injection's process.

Optionally, a clamping ring is arranged on the outer side wall of the needle cylinder.

Through adopting above-mentioned technical scheme, medical personnel with hand centre gripping on the grip ring, the medical personnel of being convenient for is fixed with the cylinder centre gripping at injection in-process hand.

Optionally, a bellows is disposed between the protective cylinder and the push plate.

Through adopting above-mentioned technical scheme, medical personnel promotes the push pedal to the direction of keeping away from the cylinder, and the push pedal drives the bellows extension, and the rethread bellows drives the protection section of thick bamboo and removes to the direction of keeping away from the cylinder to increase the removal distance of protection section of thick bamboo to the direction of keeping away from the cylinder, effectively improve medical personnel can be to the liquid medicine dosage of the interior extraction of cylinder.

Optionally, the diameter of the push plate is larger than the diameter of the corrugated pipe.

Through adopting above-mentioned technical scheme, when medical personnel extract the liquid medicine, with hand joint between bellows and push pedal to drive the push rod through the push pedal and take out to the one end of keeping away from the cylinder, effectively improve medical personnel and take out the convenience of push rod.

Optionally, the needle cylinder is provided with the anticreep ring away from the one end of syringe needle, just the opening diameter of the one end that the protection section of thick bamboo was kept away from the push pedal is less than the external diameter of anticreep ring.

By adopting the technical scheme, the anti-drop ring effectively prevents the protective cylinder from being separated from the needle cylinder, thereby effectively preventing medical staff from withdrawing the push rod from the needle cylinder.

Optionally, a plurality of guide bars are arranged at intervals in the circumferential direction between the anti-drop ring and the clamping ring, and one end of the protective cylinder, which is far away from the push plate, is arranged on the guide bars in a sliding way.

Through adopting above-mentioned technical scheme, when medical personnel inject the liquid medicine, the guide bar increases the stability that the protective cylinder removed, and then effectively increases medical personnel and order about the stability that the push rod removed.

Optionally, scale marks are arranged on the outer side wall of the needle cylinder.

By adopting the technical scheme, medical staff directly check the dosage of the liquid medicine pumped into the needle cylinder through the scale marks or the dosage of the liquid medicine injected into the receptor from the needle cylinder, and the medical staff is convenient to check the dosage of the liquid medicine in the needle cylinder.

Optionally, one end of the needle close to the needle cylinder is in threaded arrangement, and a protective sleeve is sleeved on the thread of the needle.

By adopting the technical scheme, the protective sleeve protects the needle head inside, so that the needle head is effectively prevented from being damaged or polluted by bacteria; and when medical personnel need take off the protective sheath, directly rotate the protective sheath just with the protective sheath and take off, medical personnel takes off the protective sheath conveniently.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when medical staff draws the liquid medicine, the needle is inserted into the liquid medicine, then the push plate is moved to one end far away from the needle cylinder, and the push plate drives the push rod and the protective cylinder to synchronously move to one end far away from the needle cylinder, so that the liquid medicine is drawn into the needle cylinder; when medical staff injects medicine liquid, the push plate is pushed to one end close to the needle cylinder, the push plate drives the push rod and the protective cylinder to synchronously move to one end close to the needle cylinder, so that the medicine liquid in the needle cylinder is injected into a receptor through a needle head, the protective cylinder always protects the push rod in the whole injection process, the hands of the medical staff are prevented from contacting with the push rod, external bacteria are prevented from adhering to the push rod, and the problem that the medicine liquid is polluted easily in the injection process of the medical staff by using the injector is effectively solved;

2. the medical staff pushes the push plate in the direction away from the needle cylinder, the push plate drives the corrugated pipe to extend, and then the corrugated pipe drives the protective cylinder to move in the direction away from the needle cylinder, so that the moving distance of the protective cylinder in the direction away from the needle cylinder is increased, and the dosage of liquid medicine which can be extracted into the needle cylinder by the medical staff is effectively improved;

3. the protective sleeve protects the needle head inside, so that the needle head is effectively prevented from being damaged or polluted by bacteria; and when medical personnel need take off the protective sheath, directly rotate the protective sheath just with the protective sheath and take off, medical personnel takes off the protective sheath conveniently.

Drawings

Fig. 1 is a schematic structural view of a closed syringe according to an embodiment of the present application.

Fig. 2 is a partial cross-sectional view of an embodiment of the present application (the protective sheath, syringe, shield cartridge, and bellows are shown in partial cross-section).

Fig. 3 is a partially enlarged schematic a of the portion a in fig. 2.

Reference numerals: 1. a needle cylinder; 2. a push rod; 3. a needle; 4. a protective cylinder; 5. a piston head; 6. a push plate; 7. a clamping ring; 8. a bellows; 9. anti-slip ring; 10. a guide rod; 11. scale marks; 12. a protective sleeve; 13. and a support plate.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-3.

The embodiment of the application discloses a closed syringe.

Referring to fig. 1 and 2, the closed injector comprises a needle cylinder 1, a push rod 2, a needle head 3 and a protective cylinder 4, wherein the needle cylinder 1 is hollow and is provided with an opening at one end, the push rod 2 is slidably arranged in the needle cylinder 1, one end, close to the needle cylinder 1, of the push rod 2 is provided with a piston head 5 for increasing the tightness between the push rod 2 and the inner side wall of the needle cylinder 1, one end, far away from the needle cylinder 1, of the push rod 2 is provided with a push plate 6, the protective cylinder 4 is slidably arranged on the outer side wall of the needle cylinder 1, and one end, far away from the needle cylinder 1, of the protective cylinder 4 is connected with the push plate 6; the needle 3 is installed at one end of the syringe 1 far from the push rod 2 in a communicating way.

The syringe 1 may be made of polypropylene, glass, stainless steel, etc., and in this embodiment, the syringe 1 is made of polypropylene, and has the characteristics of excellent mechanical properties, good chemical stability, transparent appearance, etc.; the push rod 2 is a plastic round rod, and the outer side wall of the push rod 2 is circumferentially provided with a plurality of support plates 13, so that the strength of the push rod 2 is increased and the push rod 2 is more stable when a medical staff moves; the piston head 5 is made of rubber and is a rubber block with the size matched with the size of the inner opening of the needle cylinder 1, and has the characteristics of aging resistance, high elasticity, low temperature resistance and the like; the protective cylinder 4 is also made of polypropylene.

When medical staff draws the liquid medicine, the needle head 3 is inserted into the liquid medicine, then the push plate 6 is moved to one end far away from the needle cylinder 1, and the push plate 6 drives the push rod 2 and the protective cylinder 4 to synchronously move to one end far away from the needle cylinder 1, so that the liquid medicine is drawn into the needle cylinder 1; when medical personnel pours into the liquid medicine, to being close to the one end of cylinder 1 and promote push pedal 6, push pedal 6 drives push rod 2 and protection section of thick bamboo 4 and removes to being close to the one end of cylinder 1 in step to pour into the liquid medicine in the cylinder 1 into the receptor through syringe needle 3, whole injection process, protection section of thick bamboo 4 is including protecting push rod 2 all the time, prevents medical personnel's hand and push rod 2 contact, and prevents outside bacterium adhesion to on push rod 2, effectively improves medical personnel and uses the easy contaminated problem of liquid medicine of leading to of syringe injection's process.

Referring to fig. 1, graduation marks 11 are installed on the outer sidewall of the cylinder 1. The medical staff can directly check the dosage of the liquid medicine pumped into the needle cylinder 1 through the scale marks 11 or the dosage of the liquid medicine injected into the receptor from the needle cylinder 1, and the medical staff can check the dosage of the liquid medicine in the needle cylinder 1 conveniently.

Referring to fig. 1 and 2, one end of the needle 3, which is close to the syringe 1, is provided with threads, and the needle 3 is provided with a protective sleeve 12 in a threaded manner. The protecting sleeve 12 can be made of silica gel, polypropylene, polyvinyl chloride and other materials, in the embodiment, the needle head 3 is made of stainless steel, a sealing ring is arranged at one end of the needle head 3 close to the needle cylinder 1, the sealing ring increases the tightness of the connection between the needle head 3 and the needle cylinder 1, the end part of the needle head 3 is protected, the end part of the needle head 3 is prevented from being broken, and the outer side wall of the sealing ring is in a threaded arrangement; the protective sleeve 12 is made of polypropylene.

The protective sleeve 12 protects the needle head 3 inside, so that the needle head 3 is effectively prevented from being damaged or polluted by bacteria; and when the medical staff needs to take off the protective sleeve 12, the protective sleeve 12 is taken off by directly rotating the protective sleeve 12, and the medical staff takes off the protective sleeve 12 conveniently.

Referring to fig. 1 and 2, a clamping ring 7 is mounted on the outer side wall of the needle cylinder 1, a corrugated pipe 8 is mounted between the protective cylinder 4 and the push plate 6, one end of the corrugated pipe 8 is connected with the push plate 6, and the other end is connected with the protective cylinder 4. In this embodiment, the clamping ring 7 is made of polypropylene as well, and is integrally formed with the needle 3; the bellows 8 may be EVA, PE, POE, and in this embodiment, the bellows 8 is made of EVA, and has characteristics of good elasticity, good flexibility, and strong compression resistance.

The medical staff clamps the hands on the clamping ring 7, so that the medical staff can clamp and fix the needle cylinder 1 conveniently in the injection process, the clamping ring 7 limits the moving distance of the protective cylinder 4 in the direction close to the needle cylinder 1, and the protective cylinder 4 drives the corrugated tube 8 to move in the direction close to the needle cylinder 1, so that the medical staff is influenced to hold the needle cylinder 1; the medical personnel move the push plate 6 to the direction of keeping away from the cylinder 1, and the push plate 6 drives the bellows 8 to extend earlier, and the rethread bellows 8 drives the protection section of thick bamboo 4 to the direction of keeping away from the cylinder 1 and remove to increase the removal distance of protection section of thick bamboo 4 to the direction of keeping away from the cylinder 1, effectively improve medical personnel can be to the liquid medicine dosage of cylinder 1 internal extraction.

Referring to fig. 1 and 2, the diameter of the push plate 6 is larger than the diameter of the bellows 8. The push plate 6 can be made of plastics, rubber, glass and the like, in the embodiment, the push plate 6 is made of plastics, and anti-slip protrusions are arranged on the push plate 6, so that the friction force between hands and the push plate 6 when medical staff pushes the push plate 6 towards the direction close to the needle cylinder 1 is increased.

When medical personnel draw the liquid medicine, with the hand joint on push pedal 6 and bellows 8 to drive push rod 2 to the one end that keeps away from cylinder 1 through push pedal 6 and take out, effectively improve medical personnel and take out the convenience of push rod 2.

Referring to fig. 2 and 3, the end of the cylinder 1 away from the needle 3 is provided with an anti-slip ring 9, and the opening diameter of the end of the shield cylinder 4 away from the push plate 6 is smaller than the outer diameter of the anti-slip ring 9. In this embodiment, the anti-slip ring 9 is also made of polypropylene and is integrally formed with the cylinder 1.

The anti-drop ring 9 effectively prevents the protective cylinder 4 from being removed from the syringe 1, thereby effectively preventing the healthcare worker from withdrawing the push rod 2 from the syringe 1.

Referring to fig. 2 and 3, a plurality of guide rods 10 are installed between the anti-falling ring 9 and the clamping ring 7 at circumferential intervals, and one end of the protective cylinder 4, which is far away from the push plate 6, is slidably installed on the guide rods 10. In this embodiment, the guide rods 10 are round rods made of aluminum alloy, and are installed at intervals along the circumferential direction of the push plate 6, and have the characteristics of light weight, high strength, and the like.

When medical staff injects the liquid medicine, guide bar 10 increases the stability that protective cylinder 4 removed, and then effectively increases the stability that medical staff drove push rod 2 to remove.

The implementation principle of the closed injector in the embodiment of the application is as follows: when medical staff draws the liquid medicine, the protective sleeve 12 is twisted off, the needle head 3 is inserted into the liquid medicine, then the push plate 6 is pushed in the direction away from the needle cylinder 1, so that the push plate 6 drives the push rod 2 and the corrugated pipe 8 to move, the corrugated pipe 8 stretches at the moment, and then the corrugated pipe 8 drives the protective cylinder 4 in the direction away from the needle cylinder 1, so that the liquid medicine is drawn into the needle cylinder 1; when the liquid medicine is injected, the hand of medical staff clamps the needle cylinder 1 through the clamping ring 7, then the push plate 6 is pressed in the direction close to the needle cylinder 1 through the other hand, the push plate 6 drives the push rod 2 to synchronously move, the liquid medicine in the needle cylinder 1 is injected into a receptor from the needle head 3 through the piston head 5, the whole injection process is carried out, the protective cylinder 4 always protects the push rod 2, the hand of medical staff is prevented from being contacted with the push rod 2, external bacteria are prevented from being adhered to the push rod 2, and the problem that the liquid medicine is polluted easily caused in the injection process of the medical staff by using the injector is effectively solved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A closed syringe, characterized in that: the needle comprises a needle cylinder (1), a push rod (2), a needle head (3) and a protective cylinder (4), wherein the needle cylinder (1) is hollow and is provided with an opening at one end, the push rod (2) is slidably arranged in the needle cylinder (1), one end, close to the needle cylinder (1), of the push rod (2) is provided with a piston head (5) for increasing the tightness between the push rod (2) and the inner side wall of the needle cylinder (1), one end, far away from the needle cylinder (1), of the push rod (2) is provided with a push plate (6), the protective cylinder (4) is slidably arranged on the outer side wall of the needle cylinder (1), and one end, far away from the needle cylinder (1), of the protective cylinder (4) is connected with the push plate (6); the needle head (3) is communicated with one end of the needle cylinder (1) far away from the push rod (2).

2. A closed syringe according to claim 1, wherein: the outer side wall of the needle cylinder (1) is provided with a clamping ring (7).

3. A closed syringe according to claim 1, wherein: a corrugated pipe (8) is arranged between the protective cylinder (4) and the push plate (6).

4. A closed syringe according to claim 3, wherein: the diameter of the push plate (6) is larger than that of the corrugated pipe (8).

5. A closed syringe according to claim 2, wherein: one end of the needle cylinder (1) far away from the needle head (3) is provided with an anti-drop ring (9), and the opening diameter of one end of the protective cylinder (4) far away from the push plate (6) is smaller than the outer diameter of the anti-drop ring (9).

6. The closed syringe of claim 5, wherein: a plurality of guide rods (10) are circumferentially arranged between the anti-falling ring (9) and the clamping ring (7) at intervals, and one end, far away from the push plate (6), of the protection cylinder (4) is arranged on the guide rods (10) in a sliding mode.

7. A closed syringe according to claim 1, wherein: scale marks (11) are arranged on the outer side wall of the needle cylinder (1).

8. A closed syringe according to claim 1, wherein: one end of the needle head (3) close to the needle cylinder (1) is in threaded arrangement, and a protective sleeve (12) is sleeved on the thread of the needle head (3).