CN1695747A - Injection needle protection structure - Google Patents

Abstract

The present invention is a needle protection structure, including: a sleeve barrel, which is a hollow barrel body, the front end of the sleeve barrel is provided with a barrel opening, the interior of the sleeve barrel is a sleeve chamber, the opening part near the rear part of the sleeve barrel is inwards provided with two front blocking parts and two rear blocking parts in a protruding way, and a blocking groove is formed between the front blocking part and the rear blocking part; a relay seat which is a hollow cylinder and is sleeved in the sleeve chamber, a seat projection extends out of the front of the relay seat, an embedding hole communicated with the seat projection is arranged at the rear of the relay seat, and at least two elastic fins are arranged on the periphery of the bottom of the base in a projecting manner; so that the liquid medicine cylinder can be embedded with the cylinder cone of the liquid medicine cylinder through the embedding hole and pushed forwards, the liquid medicine cylinder, the push rod and the relay seat are moved forwards to the front of the sleeve, the seat protrudes out of the cylinder opening, the needle head sucks liquid medicine, and after injection, the sleeve is pushed forwards, and the fins are clamped in the blocking groove for positioning.

Description

Injection needle protection structure

technical field

The invention relates to a protective structure for injection needles, in particular to a protective structure for injection needles which can prevent the needles from being reused after injection and protect medical staff from being stabbed.

Background technique

Injection is a common thing in people's medical behavior. Usually, the injection syringe is used to absorb the liquid medicine, and then the needle is used to inject the liquid medicine into the human body. Therefore, for medical treatment, the injection syringe is a must. prepared items.

With the improvement of medical risks and the consideration of personal safety and hygiene, disposable or one-time injection devices have become mainstream, especially in recent years, cases of infection caused by needle stick injuries, such as AIDS or hepatitis, sometimes occur. heard. Therefore, medical practitioners, such as doctors or nurses, pay attention to the injection behavior and dare not take it lightly, and the selection of injection syringes and the prevention of secondary use are naturally the primary tasks.

Generally speaking, the existing injection device can include a liquid medicine cartridge, a needle seat connected to the front end of the liquid medicine cylinder, and a push rod that can slide in the liquid medicine cylinder, and in order to prevent the injection needle from being exposed, Most of them are covered with a needle cover outside the needle base. Therefore, in order to prevent the needle from being used after injection, many different protective structures have been developed for the industry, and there is no lack of patented prior art.

Such as the "injection needle protection structure" of the No. 092221768 patent application filed by the applicant of the present invention on December 11, 1992, which discloses a needle holder that can prevent secondary use of the injection needle and avoid misuse. Injection needle protection structure for medical personnel, the structure is composed of a sleeve and a needle seat, wherein, the sleeve has a mouth at the front end, and the inside is a hollow chamber, and a pair of plugs are arranged on the inner wall facing each other. groove, and can accommodate a plug, and the outer side of the plug groove is farther away from the mouth of the cylinder, and at least one pair of buckle grooves are oppositely arranged, and a stop groove is opened on the outside, and the inner wall between the stop groove and the mouth of the barrel is respectively provided A section of channel; and the needle seat is composed of a needle and a seat body fixed and connected to the needle head, the seat body can be combined with the liquid medicine cartridge, a seat groove is provided corresponding to the plug groove, and has at least one elastic buckle tenon, Its cross-section corresponds to the buckle groove and the stop groove; so that when the needle holder is placed in the sleeve, the plug block presses against the plug groove and the seat groove, and the buckle tenon falls into the buckle groove to fix it; only the seat body can be rotated after being connected to the liquid cartridge Make the tenon fall into the groove, put the sleeve back and expose the needle from the mouth of the cylinder to absorb the liquid medicine, and when moving forward after injection, the tenon can be buckled in the stop groove for positioning.

Therefore, the implementation of this case can indeed achieve the expected purpose of injection needle protection, that is, to avoid the occurrence of secondary use and accidental injury.

In view of this, the applicant of the present invention, in the spirit of follow-up research and development, hopes to further improve the existing products, so that the medical staff can avoid the fear of accidentally stabbing injuries, and the injected patients can avoid the secondary use of needles. Doubts, painstaking research, repeated experiments and tests, and then create the "injection needle protection structure of the present invention."

Contents of the invention

The main purpose of the present invention is to provide a protective structure for injection needles, which includes: a sleeve, which is a hollow cylinder, with a mouth at the front end, a set of chambers inside, and two openings protruding inward from the opening near the rear. The front and rear baffles form a baffle groove between them; a relay seat is a hollow cylinder and is inserted into the chamber, with a protruding seat protruding from the front and an embedding hole communicating with the seat protruding from the rear. At least two elastic fins protrude from the periphery of the bottom of the seat body; so that they can be fitted with the cone of the liquid medicine cartridge through the embedded hole, and pushed forward, so that the liquid medicine cartridge together with the push rod and the relay seat move forward to the front of the sleeve. The seat protrudes out of the mouth of the tube to allow the needle to absorb the liquid medicine, and after injection, the sleeve is pushed forward so that the wings are locked in the retaining groove for positioning.

Description of drawings

In order to further disclose the specific technical content of the present invention, first please refer to the drawings, wherein:

Fig. 1 is the three-dimensional exploded view of the injection needle protection structure of the present invention;

Fig. 2 is the sectional view after the present invention is assembled;

Figure 3 is a sectional view of the present invention combined with an injection needle;

Figure 4A and Figure 4B are cross-sectional views of the present invention after absorbing and injecting the medicinal solution;

Figure 5 is a sectional view of the present invention when the needle is withdrawn;

Fig. 6 is a cross-sectional view of the liquid medicine cylinder and push rod separated from the protective structure after the needle is withdrawn according to the present invention.

Detailed ways

As shown in FIG. 1 to FIG. 2 , basically, the injection needle protection structure of the present invention is composed of a sleeve 1 and a relay seat 2 that can be connected with a liquid medicine cartridge A.

Wherein, the sleeve 1 is a cylindrical object with a mouth 11 at its front end for the extension or retraction of the seat protrusion 21 at the front end of the relay seat 2 , and a set of chambers 12 is formed inside. In order to make the present invention have a protective mechanism, a pair of annular front stoppers 13 and rear stoppers 14 protrude inwardly from the adjacent opening in the chamber 12, and a stopper groove 15 is formed therebetween. In order to make the relay base 2 smoothly enter the retaining groove 15 when it retreats, a beveled surface 131 is formed forward so as to guide the relay base 2 to engage in the retaining groove 15 . In addition, in order to facilitate the injection molding of the mold, the height of the front stop portion 13 is slightly higher than that of the rear stop portion 14 .

The relay seat 2 is a hollow cylinder, and a protrusion 21 protrudes from its front, so that the existing needle seat B can be socketed, but it is not limited to this, and it can also be directly combined with a needle on the seat protrusion 21, which belongs to the present invention. The category to be protected by the invention. The rear center of the relay seat 2 is provided with an embedding hole 22 communicating with the seat protrusion 21, which is socketed and fitted with the barrel taper at the front end of the liquid medicine cartridge A. In addition, at least two elastic fins 23 protrude laterally from the periphery of the bottom of the relay seat 2. As shown in the figure, three fins 23 protrude equiangularly, and pass through the grooves 231 respectively opened on the upper and lower sides. , and make these fins 23 flexible.

Please refer to Fig. 2 again. When the present invention is to be assembled, it is only necessary to use jigs to retract the wings 23 into the relay seat 2, so that the front and rear stoppers 13 and 14 can be easily crossed and positioned at the front. Before the blocking part 13.

Please refer to Fig. 3, when the present invention is combined with the injection needle, the liquid medicine cylinder A is penetrated through the opening at the bottom of the sleeve 1, so that the front cylinder taper is inserted into the embedding hole 22, and the medicine liquid cylinder A is pushed forward as a relay The fins 23 of the seat 2 move forward synchronously along the barrel wall until they touch the front wall of the sleeve 1, so that the seat protrusion 21 protrudes from the barrel mouth 11. At this time, the medical staff can fit the needle seat B with the seat protrusion 21, so that the needle at the end can be inserted into the liquid medicine bottle, and then pull the push rod C backward to make the medicine liquid pass through the needle seat B and the relay. Seat 2, and stored in the liquid medicine cartridge A (as shown in Figure 4A). At this point, the medical staff can perform the injection (as shown in FIG. 4B ).

When the injection is completed, pull the liquid medicine cartridge A together with the push rod C, the relay seat 2 and the needle seat B backwards, so that the wings 23 are displaced along the inner wall of the sleeve 1, and when they cross the beveled surface of the front stop 13 131, that is, fall into the retaining groove 15, and reach the limit of the rear retaining portion 14, that is, form the locking state as shown in FIG. 5 . In this way, the relay seat 2 and the needle seat B cannot escape from the sleeve 1, and the liquid medicine cartridge A and the push rod C can be separated from the relay seat 2 (as shown in FIG. 6 ), and can be recycled. In this way, the sleeve 1 and the relay base 2 including the needle are in a protective state that cannot be used anymore.

In particular, in order to increase the degree of integration between the seat protrusion 21 and the needle base B, a section of snap ring 24 is horizontally extended from the outer periphery of the seat protrusion 21, and ribs 241 are provided in the ring to facilitate the connection with the needle base B. Connected by screwing.

Therefore, through the implementation of the present invention, it not only greatly reduces the complexity of the components, but also simplifies the structure, which can greatly reduce the manufacturing cost. In addition, the relay seat and the sleeve of the present invention are in a non-detachable state after assembly, which can ensure safety during transportation and storage. Furthermore, the seat protrusion of the relay seat of the present invention can be directly provided with needles, or it can be used flexibly in response to various existing needle seats. In particular, the pull-back mechanism of the relay seat after the injection of the present invention is reliable, and unless it is damaged by external force, it will be positioned in the sleeve together with the needle seat, reaching a completely safe state where the needle is not exposed. Especially advanced, the present invention can upgrade the existing injection syringes to safe injection syringes, which can be regarded as a masterpiece of similar items.

What the present invention discloses is one of the preferred embodiments. For example, all partial changes or modifications derived from the technical idea of the present invention and easily deduced by those skilled in the art will not break the patent right of the present invention. category.

Claims (9)

1. syringe needle protecting structure is characterized in that comprising:

One sleeve is hollow cylinder, and its front end is provided with a nozzle, and inside is a cover chamber, and the peristome at its nearly rear inwardly is equipped with the forward and backward stopper of twice, and therebetween forms a retaining groove;

One relay seat is hollow cylinder, and is inserted in indoorly, and one of its place ahead projection is prominent, the rear then have one with the prominent embedding hole that communicates of seat, this pedestal bottom peripheral edge is dashed forward and is established at least two elastic fins;

So that can be chimeric, and promote forward, make cartridge move forward to sleeve the place ahead together with push rod and relay seat by the tube awl of embedding hole and cartridge, and the order seat stretches out nozzle, makes its syringe needle draw medicinal liquid, and after the injection, push away before the sleeve, this fin clip is located in retaining groove.

2. syringe needle protecting structure as claimed in claim 1 is characterized in that: in this front block unit the place ahead have a bevel.

3. a kind of syringe needle protecting structure as claimed in claim 1 is characterized in that: this forward and backward stopper all is annular.

4. a kind of syringe needle protecting structure as claimed in claim 1 is characterized in that: this fin is to be three.

5. a kind of syringe needle protecting structure as claimed in claim 1 is characterized in that: the upper and lower edge of this fin is opened lateral trench.

6. a kind of syringe needle protecting structure as claimed in claim 1 is characterized in that: be provided with syringe needle in this seat is prominent.

7. a kind of syringe needle protecting structure as claimed in claim 1 is characterized in that: in this seat prominent be the needle stand of chimeric tool syringe needle.

8. a kind of syringe needle protecting structure as claimed in claim 7 is characterized in that: the peripheral level of this prominent latter end is to extending one section snap ring, and the setting of tool rib stricture of vagina in its ring is so that link with screw-in version with needle stand.

9. a kind of syringe needle protecting structure as claimed in claim 1 is characterized in that: the height of this front block unit is a little more than the back stopper.

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