CN216136492U

CN216136492U - Self-exhaust needle

Info

Publication number: CN216136492U
Application number: CN202121491203.7U
Authority: CN
Inventors: 詹琴林
Original assignee: Guangdong No 2 Peoples Hospital
Current assignee: Guangdong No 2 Peoples Hospital
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-03-29
Anticipated expiration: 2031-06-30

Abstract

The utility model relates to the technical field of medical supplies, in particular to a self-exhaust needle head which comprises a pintle and a needle stem, wherein the pintle and the needle stem are both of a hollow structure, one end of the needle stem is connected and communicated with the top end of the pintle, the other end of the needle stem is provided with a needle point, and the side wall of the pintle is provided with an exhaust structure for balancing air pressure in a medicine bottle. The pintle of the utility model is provided with the exhaust structure, does not need manual exhaust, can balance the air pressure in the medicine bottle in the medicine adding or medicine dispensing process, does not waste the medicine liquid, does not pollute the surrounding environment, and is safe and sanitary to use.

Description

Self-exhaust needle

Technical Field

The utility model relates to the technical field of medical supplies, in particular to a self-exhaust needle.

Background

Syringe needle that uses clinically at present is the singleness formula, and the nurse need extract the needle and inwards injects the air or part the junction of syringe nipple and needle under the most condition when adding medicine, and the exhaust gas just can be smoothly taken out the liquid medicine that dissolves well, and the mode of manual exhaust makes external dust, microorganism cause the pollution to the liquid medicine like this easily.

The pressure of most antibiotic medicine bottles is positive pressure, the traditional injector adds medicine, the pressure is increased by about 1.5 times after the solvent is added into the medicine bottle, the liquid medicine is easy to splash from nipples under strong pressure, especially in the process of preparing chemotherapy medicines, after a powder ampoule is opened to extract the bottled liquid medicine, the invisible liquid medicine escapes during operations such as needle pulling and the like, aerosol or aerial fog containing toxic particles can be formed, an operator is influenced by low-dose medicines through three ways of skin contact, respiratory tract inhalation and oral deglutition, the pollution is caused to the surrounding environment, and the injury is also caused to operators.

For example, chinese patent publication No. CN205145137U discloses a dispensing syringe, which comprises a needle, a needle cap, an injection nipple and an injection tube, wherein the injection nipple is provided with a plurality of air holes, and the injection nipple is externally sleeved with a buffer cap covering the air holes, when the pressure in the bottle is too high and the air and the liquid medicine are simultaneously injected out of the air holes, the buffer cap can play a role of storing the liquid medicine.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems that in the dispensing process, the medicine liquid is easily polluted by repeatedly puncturing the screen plug and manually exhausting, the medicine liquid easily overflows when the pressure in the bottle is overlarge, the medicine liquid is wasted and the surrounding environment is polluted, and provides the self-exhausting needle which does not need manual exhausting in the dispensing process, can effectively balance the pressure in the dispensing bottle and is safe and sanitary to use.

In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a from exhaust syringe needle, includes pintle and needle stalk, pintle and needle stalk are hollow structure, the one end of needle stalk with the top of pintle is connected and is communicate, the needle stalk other end is equipped with the needle point, the lateral wall of pintle is equipped with the exhaust structure who is used for balancing the inside atmospheric pressure of medicine bottle.

The side wall of the pintle is provided with the exhaust structure, so that manual exhaust is not needed, the air pressure in the medicine bottle can be balanced in the medicine adding or medicine dispensing process, the waste of medicine liquid is avoided, the pollution to the surrounding environment is avoided, and the use is safe and sanitary.

Preferably, the exhaust structure is an exhaust duct which is arranged on the side wall of the pintle and communicated with the hollow cavity of the pintle, and an exhaust membrane which is used for blocking liquid and allowing gas to pass through is arranged on the exhaust duct; when the needle point and part of the needle stalk are inserted into the medicine bottle, the interior of the medicine bottle is communicated with the outside atmosphere through the exhaust hole, and the air flow can freely pass through the exhaust membrane, so that the effect of balancing the air pressure in the medicine bottle can be realized.

Preferably, the side of the exhaust membrane is hermetically bonded on the hole wall of the exhaust hole channel.

Preferably, the side wall of the pintle is provided with a fixed seat; the exhaust duct is arranged on the fixed seat; the side wall of the pintle is provided with the fixed seat, and fingers can be supported on the fixed seat in the dosing or dispensing process, so that the comfort level of dosing or dispensing operation can be improved.

Preferably, the exhaust structure further comprises a plug head for plugging the exhaust duct; the plug head is detachably connected with the exhaust duct; the plug head can plug and block the exhaust duct when needed, and can protect an exhaust membrane in the exhaust duct.

Preferably, the exhaust structure further comprises a connecting member; the connecting piece comprises a bearing part and a bendable connecting part; the plug head is arranged on the bearing part, one end of the connecting part is connected with the bearing part, and the other end of the connecting part is connected with the fixed seat; the arrangement of the connecting piece can ensure that the plug head can not be completely separated from the fixed seat after being pulled out from the exhaust duct, on one hand, the plug head can be prevented from being thrown randomly, and on the other hand, the sanitation of the plug head can be still kept when the plug head needs to be plugged into the exhaust duct again.

Preferably, the length of the cross section of the bearing part is greater than that of the fixing seat; the arrangement is convenient for the connecting piece to drive the plug head to be pulled out from the exhaust duct, and is labor-saving and convenient.

Preferably, the material of the exhaust membrane is expanded polytetrafluoroethylene.

Preferably, the distance between the exhaust duct and the bottom end of the pintle is 0.5-0.8 cm.

Preferably, the length of the needle stalk is set to be 1.2-1.8 cm; the length of the needle stalk can suck the medicine completely without withdrawing the needle after the needle tip is inserted into the bottle plug, and the suction speed can be greatly improved.

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

1) the pintle of the utility model is provided with the exhaust structure, does not need manual exhaust, can balance the air pressure in the medicine bottle in the medicine adding or medicine dispensing process, does not waste the medicine liquid, does not pollute the surrounding environment, is safe and sanitary to use, and can also greatly improve the medicine adding or medicine dispensing speed;

2) the air exhaust structure is simple in arrangement, air in the medicine bottle can freely circulate with external air flow, and the air exhaust hole channel can be plugged when needed, so that an air exhaust film in the air exhaust hole channel can be well protected;

3) the length of the needle stalk is shorter than that of the traditional conventional needle stalk, so that the medicine can be completely sucked without withdrawing the needle after the needle tip is inserted into the bottle stopper, and the suction rate can be greatly improved;

4) the utility model has simple integral structure and low processing cost, can be matched with injectors of various specifications for use, has high practicability and strong applicability, and is worthy of large-scale popularization and application.

Drawings

FIG. 1 is a schematic structural view of a self-venting needle of embodiment 1 of the present invention;

FIG. 2 is a schematic view of the structure of the vent structure connected to the pintle in embodiment 1 of the present invention;

FIG. 3 is a schematic structural view of a self-venting needle of embodiment 2 of the present invention;

FIG. 4 is a schematic view of the structure of the vent structure connected to the pintle in example 2 of the present invention;

fig. 5 is a schematic structural view of the connection between the connecting member and the fixing base in embodiment 2 of the present invention.

In the drawings: 1-pintle, 2-needle stem, 3-needle point, 4-exhaust structure, 41-fixing seat, 42-exhaust channel, 43-plug, 44-exhaust membrane, 45-connecting piece, 451-bearing part and 452-connecting part.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for convenience of description and simplicity of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

The technical scheme of the utility model is further described in detail by the following specific embodiments in combination with the attached drawings:

example 1

Fig. 1-2 show an embodiment 1 of a self-venting needle, which includes a pintle 1, a needle stem 2, a needle tip 3 and a venting structure 4, wherein the pintle 1 is hollow, and the bottom of the pintle 1 is open and can be sleeved on a nipple of an injector to connect the needle tip and the injector; the needle stem 2 is of a hollow structure, one end of the needle stem 2 is fixedly bonded to the top of the pintle 1 through resin adhesive, the needle stem 2 is communicated with the pintle 1, the other end of the needle stem 2 is provided with a needle point 3, and the needle point 3 is formed by arranging the end part of the needle stem 2 into an inclined section.

The length of the pintle 1 is set to be the length of the pintle in the universal needle head, the length of the needle stem 2 is set to be 1.2-1.8cm, and the length of the needle stem 2 is set to be 1.5cm in the embodiment, so that medicine can be completely sucked without withdrawing the needle after the needle point 3 and part of the needle stem 2 are inserted into the bottle stopper, and the suction rate can be greatly improved.

Wherein exhaust structure 4 sets up the lateral wall at pintle 1, and this exhaust structure 4 set up can need not manual exhaust at the medicine or the in-process of dispensing, and atmospheric pressure in can the automatic balance medicine bottle can not lead to the fact the waste to the liquid medicine, dust, microorganism in the reducible external air when exhausting manually to the pollution of liquid medicine, also can reduce some chemotherapy class medicines and escape and the pollution that causes the surrounding environment, and is safe in utilization health.

Specifically, the exhaust structure 4 includes an exhaust duct 42 and an exhaust membrane 44, the exhaust duct 42 is communicated with the pintle 1, wherein the exhaust membrane 44 is connected in the exhaust duct 42, the material of the exhaust membrane 44 is expanded polytetrafluoroethylene, the exhaust membrane 44 can block liquid, but gas can freely pass through, the edge side of the exhaust membrane 44 is hermetically bonded to the hole wall of the exhaust duct 42, of course, the exhaust membrane 44 can also be fixed on the exhaust duct 42 by a structure such as clamping, and a sealing ring is arranged at a position where the exhaust membrane 44 contacts with the hole wall of the exhaust duct 42, so as to improve the sealing property of the connection between the exhaust membrane 44 and the exhaust duct 42.

In this embodiment, the air vent 42 is a channel disposed on the sidewall of the pintle 1, and since the pintle 1 is generally sleeved on the syringe nipple, the syringe nipple can be inserted into the pintle 1 by a distance of about 0.5cm, so that the distance H between the air vent 42 and the bottom of the pintle 1 is set to 0.5-0.8cm, so as to avoid the influence of the contact between the syringe nipple and the air exhaust structure 4 after being inserted into the pintle 1, which would affect the normal air exhaust of the air exhaust structure 4, in this embodiment, the distance H between the air vent 42 and the bottom of the pintle 1 is set to 0.6 cm.

The automatic air exhaust device can realize automatic air exhaust in the medicine adding or medicine dispensing process, has simple integral structure arrangement and low processing cost, can be matched with injectors of various specifications for use, has high practicability and strong applicability, and is worthy of large-scale popularization and application.

Example 2

Fig. 3-4 show an embodiment 2 of a self-venting needle, which is different from the above embodiment 1 in the arrangement of a venting structure 4; specifically, the exhaust structure 4 includes a fixing seat 41, an exhaust duct 42, a plug 43, an exhaust membrane 44 and a connecting piece 45, wherein the fixing seat 41 is arranged on the side wall of the pintle 1, the exhaust duct 42 is arranged on the fixing seat 41, the air vent passage 42 is communicated with the pintle 1, one end of the air vent passage 42 close to the pintle 1 is provided with the air vent film 44, the material of the air discharge membrane 44 is expanded polytetrafluoroethylene, the air discharge membrane 44 can block liquid, but gas can freely pass through, the side of the exhaust membrane 44 is sealed and adhered to the hole wall of the exhaust duct 42, and of course, the exhaust membrane 44 can also be fixed on the exhaust duct 42 by clamping or the like, and a sealing ring is arranged at the position where the exhaust membrane 44 contacts with the hole wall of the exhaust duct 42, in order to improve the sealing performance of the connection between the vent film 44 and the vent hole 42, the distance H between the vent hole 42 and the bottom of the pintle 1 is set to 0.7cm in this embodiment.

The plug 43 is made of rubber or silica gel and is used for plugging the exhaust duct 42 when needed, so that the exhaust membrane 42 can be protected in a sealing manner, and the exhaust duct 42 is prevented from being polluted and blocked to influence the normal exhaust function.

The connecting piece 45 comprises a bearing part 451 and a connecting part 452, wherein the plug 43 is connected to the bearing part 451, the connecting part 452 is provided with a bendable structure, one end of the connecting part 452 is connected with the fixed seat 41, the other end of the connecting part 452 is connected with the bearing part 451, the bearing part 451 can drive the plug 43 to be installed on the exhaust duct 42 or pulled out of the exhaust duct 42, when the bearing part 451 drives the plug 43 to be pulled out of the exhaust duct 42, the plug 43 and the bearing part 451 cannot be completely separated from the fixed seat 41, the throwing of the plug can be effectively avoided, and the sanitation of the plug 43 can be still maintained when the plug 43 needs to be plugged into the exhaust duct 42 again; in addition, the cross section length L1 of the bearing part 451 is larger than the cross section length L2 of the fixing seat 41, so that the bearing part 451 can be further pulled out from the fixing seat 41 by hands, the use is labor-saving and convenient, and the practicability is high.

In this embodiment, the fixing seat 41 and the pintle 1 are integrally formed, so that the sealing performance of the connection between the fixing seat 41 and the pintle 1 can be ensured to the greatest extent by adopting the preferred scheme, and of course, the fixing seat 41 can also be installed on the pintle 1 in a manner of insertion or clamping, etc. so as to reduce the difficulty in processing and reduce the production cost.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a from exhaust syringe needle, includes pintle (1) and needle stalk (2), pintle (1) and needle stalk (2) are hollow structure, the one end of needle stalk (2) with the top of pintle (1) is connected and is communicated with each other, needle stalk (2) other end is equipped with needle point (3), its characterized in that: the side wall of the pintle (1) is provided with an exhaust structure (4) for balancing the air pressure in the medicine bottle.

2. A self-venting needle as defined in claim 1, wherein: the exhaust structure (4) is an exhaust duct (42) which is arranged on the side wall of the pintle (1) and communicated with the hollow cavity of the pintle (1), and an exhaust membrane (44) which is used for blocking liquid and allowing gas to pass through is arranged on the exhaust duct (42).

3. A self-venting needle as defined in claim 2, wherein: the side of the exhaust membrane (44) is hermetically bonded on the hole wall of the exhaust hole channel (42).

4. A self-venting needle as defined in claim 2, wherein: the side wall of the pintle (1) is provided with a fixed seat (41); the exhaust duct (42) is arranged on the fixed seat (41).

5. A self-venting needle as defined in claim 4, wherein: the exhaust structure (4) further comprises a plug head (43) for plugging the exhaust duct (42); the plug head (43) is detachably connected with the vent hole (42).

6. A self-venting needle as defined in claim 5, wherein: the exhaust structure (4) further comprises a connecting piece (45); the connecting piece (45) comprises a bearing part (451) and a bendable connecting part (452); the plug head (43) is arranged on the bearing part (451), one end of the connecting part (452) is connected with the bearing part (451), and the other end of the connecting part is connected with the fixed seat (41).

7. A self-venting needle as defined in claim 6, wherein: the cross-sectional length of the bearing part (451) is larger than that of the fixed seat (41).

8. A self-venting needle as defined in claim 2, wherein: the material of the exhaust membrane (44) is expanded polytetrafluoroethylene.

9. A self-venting needle as defined in any one of claims 2 to 8, wherein: the distance between the exhaust duct (42) and the bottom end of the pintle (1) is 0.5-0.8 cm.

10. A self-venting needle as defined in any one of claims 1 to 8, wherein: the length of the needle stalk (2) is set to be 1.2-1.8 cm.