TWI586398B - Safety needle and safety syringe - Google Patents

Description

Safety needle and safety syringe

The invention relates to a syringe; in particular to a safety needle and a safety syringe which can prevent a person from being injured by an injection needle.

A syringe is a common medical device used to inject drugs, blood, etc. into humans or animals. Once the syringe has been used, it becomes a medical waste and must be properly recycled to avoid the risk of contracting the person with the injection needle of the syringe.

After the conventional syringe is used, the personnel cover the needle with a needle cover to shield the needle. However, when the person puts the needle cover on the needle, if the alignment is not allowed, the needle will be pulled to the person's finger, causing injury. In order to avoid the above situation, there are currently safety syringes. Currently, there are two types of safety syringes known. One is to retract the needle into the syringe, and the other is to add an outer sleeve to the syringe. After use, push the outer sleeve forward to shield the needle. Regardless of the type of safety syringe described above, the manufacturing cost is still high and, therefore, is not commonly used.

In view of the above, an object of the present invention is to provide a safety needle and a safety syringe, which can effectively prevent a person from being injured by an injection needle.

Another object of the present invention is to provide a safety needle and a safety syringe that have a lower manufacturing cost.

In order to achieve the above object, the present invention provides a safety needle comprising a needle seat, an injection needle, a needle sleeve and an elastic member, wherein the needle holder is coupled to a syringe; the injection needle is coupled to the needle a needle holder having a needle tip; the needle sleeve is detachably coupled to the needle holder and sleeved on the needle; the elastic member is disposed between the needle holder and the needle sleeve, and one end of the elastic member is connected The needle holder has the other end connected to the needle sleeve; wherein, when the needle sleeve is combined with the needle holder, the elastic member is compressed, and when the needle holder is separated from the needle sleeve, the elastic member elastically recovers, and the needle sleeve is set to The needle tip of the needle is pushed in such a direction that the needle sleeve shields the needle tip.

The invention provides a safety syringe comprising a syringe, a needle holder, an injection needle, a needle sleeve and an elastic member, wherein the needle holder is coupled to a syringe; the injection needle is coupled to the needle holder And having a needle tip; the needle sleeve is detachably coupled to the needle holder and sleeved on the injection needle; the elastic member is disposed between the needle holder and the needle sleeve, and one end of the elastic member is connected to the needle The other end is connected to the needle sleeve; wherein, when the needle sleeve is combined with the needle holder, the elastic member is compressed, and when the needle holder is separated from the needle sleeve, the elastic member elastically recovers, and the needle sleeve is applied to the injection The direction of the needle tip of the needle is pushed so that the needle sleeve shields the needle tip.

The invention has the effect that the elastic member can be matched by the design of the separable needle seat and the needle sleeve, so that the person can be effectively prevented from being injured by the injection needle. The safety needle component is small, the assembly is convenient, and it can be installed on various syringes, thereby effectively reducing the manufacturing cost.

In order to explain the present invention more clearly, a preferred embodiment will be described in detail with reference to the drawings. Referring to FIG. 1 to FIG. 3, a safety syringe according to a preferred embodiment of the present invention includes a syringe 10 and a safety needle 20. The syringe 10 has a front end 102. The safety needle 20 is detachably sleeved on the front end 102 of the syringe 10. In the embodiment, the syringe 10 and the safety needle 20 are luer tapers. Combine with each other. The safety needle 20 includes a needle hub 22, an injection needle 28, a needle sleeve 30 and an elastic member.

4, the needle hub 22 includes a sleeve 24 and a column tube 26. The sleeve 24 is sleeved on the front end 102 of the syringe 10, and the sleeve 24 is rotated by a user. Combined with the syringe 10. The tube 26 has a smaller diameter than the sleeve 24, and the tube 26 has a first joint portion adjacent to the sleeve. In this embodiment, the first joint portion includes a latch 262. The 262 is formed to extend outward from the outer ring surface of the column tube 26. The needle holder 22 further has a plurality of spacers 264 spaced apart along the circumferential direction of the cassette 262 to divide the cassette 262 into a plurality of portions, and the cassettes 262 are spaced apart from each other. There is a stop surface 262a between the sheets 264. Thereby, two pairs of blocking surfaces 262a are formed on the cassette 262, and each pair of blocking surfaces 262a are respectively located at opposite positions on the needle holder 22. The outer annular surface of the column tube 26 extends further outward to form a plurality of bumps 266. In addition, the spacers 264 serve as a point of application of the fingers when the user tightens or loosens the hub 22.

The injection needle 28 has a needle tip 282 and a body portion 284. A portion of the body portion 284 is passed through the sleeve 24 and the column tube 26 of the needle hub 22.

5 to 7 , the needle sleeve 30 is movably sleeved on the column tube 26 of the needle holder 22 , and includes a set body 32 , a second joint portion and at least one pressure receiving portion 36 . One end of the sleeve 32 has a through hole 322 and the other end is open, and the through hole 322 is passed through the injection needle 28. The inner wall of the sleeve body 32 extends to form at least one hook portion 324. In the embodiment, the hook portion 324 has two numbers and is located on both sides of the axis of the through hole 322. The second joint is detachably coupled to the first joint of the hub 22 such that the sleeve 30 is coupled to the hub 22. In this embodiment, the second joint portion includes at least one hook 34 extending from the end edge of the sleeve body 32 toward the syringe barrel 10, and the number of the hooks 34 is two, and the two hooks 34 are Two opposite positions on the edge of the sleeve 32, respectively. The two hooks 34 are detachably fastened to the two opposite surfaces 262a of the latch 262, and the spacers 264 on both sides of the blocking surface 262a can block the two hooks 34 to prevent the sleeve 30 from rotating. . The at least one pressure receiving portion 36 is two in the embodiment, and the two pressure receiving portions 36 are respectively located on two sides of the axis of the needle sleeve 30 and respectively have a connecting rib 362, and the two connecting ribs 362 are away from the The two sides of the connecting rib 362 are respectively connected to the side edges of the hooks 34, and the other ends of the connecting ribs 362 are respectively connected to the hooks 34. The other side. Therefore, the two pressure receiving portions 36 constitute a separating means, and when the two pressure receiving portions 36 are deformed by an external force, the two ends of the connecting ribs 362 are pushed outward to push the two hooks. 34, the two hooks 34 are driven to expand outward.

In the present embodiment, the elastic member includes a spring 38 disposed between the needle hub 22 and the needle sleeve 30. More specifically, the spring 38 is sleeved on the column tube 26, and the spring 38 One end of the spring 38 is engaged with the protrusion on the column tube 26, and the other end of the spring 38 is engaged with the two hook portions 324 in the sleeve body 32. The axis of the spring 38 is not slightly offset from the axis of the needle 28 and is slightly offset.

Referring to FIG. 8, when the needle sleeve 30 is coupled with the needle hub 22, the needle sleeve 30 is sleeved on the column tube 26 and the spring 38 is pushed and compressed. Referring to FIG. 7 and FIG. 9 , when the user presses the two pressure receiving portions 36 of the needle sleeve 30 , the two hooks 34 are expanded outward to disengage the two hooks 34 from the blocking surface 262 a of the latch 262 .

Then, please cooperate with FIG. 10, the user slightly shifts the needle sleeve 30 toward the needle tip 282, and after releasing the needle sleeve 30, the spring 38 elastically recovers, and the needle sleeve 30 is directed to the needle tip of the injection needle 28. The direction of the 282 is pushed so that the sleeve 32 of the needle sleeve 30 shields the needle tip 282 to prevent the needle tip 282 from being exposed and injured. Since the axis of the spring 38 is slightly offset with respect to the axis of the injection needle 28, when the needle sleeve 30 shields the needle tip 282, the needle tip 282 is directed toward the periphery of the perforation 322, so that the injection needle 28 is long. An extension line i of the axial axis does not pass through the perforation 322. Thereby, if the user accidentally touches the needle sleeve 30, the needle tip 282 can be prevented from passing through the through hole 322 again. The user can rest assured that a finger grip portion of the needle hub spacer on the 22264, the hub 22 of the syringe 10 from the rotation, and thus the hub 22 and the syringe 10 of the sorting process.

In the foregoing embodiment, the separating means is located on the needle sleeve 30. In another embodiment, a separating means may be disposed on the needle seat 22 to separate the first joint portion from the second joint portion, for example The two hooks 34 are pushed outward by the separating means to separate the two hooks 34 from the two blocking faces 262a of the latch 262.

According to the above, the safety needle and the safety syringe of the present invention can effectively prevent the person from being injured by the injection needle by the elastic member of the separable needle seat and the needle sleeve. It is worth mentioning that the safety needle of the invention has fewer components, is convenient to assemble, and can be installed on various syringes, thereby effectively reducing the manufacturing cost.

The above is only a preferred embodiment of the present invention, and equivalent changes to the scope of the present invention and the scope of the patent application are intended to be included in the scope of the present invention.

[this invention]

10‧‧‧ syringe

102‧‧‧ front end

20‧‧‧Safety needle

22‧‧‧ needle seat

24‧‧‧ casing

26‧‧‧column tube

262‧‧‧Carmen

262a‧‧ ‧ facing

264‧‧‧ spacer

266‧‧‧Bumps

28‧‧‧Injection needle

282‧‧‧needle

284‧‧‧ Body

30‧‧‧ needle sets

32‧‧‧ Socket

322‧‧‧Perforation

324‧‧‧Hook

34‧‧‧ card hook

36‧‧‧ Pressure Department

362‧‧‧ Connecting ribs

38‧‧‧ Spring

i‧‧‧Extension line

1 is a perspective view of a safety syringe in accordance with a preferred embodiment of the present invention. Figure 2 is a partial enlarged view of Figure 1. Figure 3 is an exploded view of the safety syringe of the above preferred embodiment. Figure 4 is a perspective view of the hub of the preferred embodiment. Figure 5 is a perspective view of the needle cover of the above preferred embodiment. Figure 6 is a rear elevational view of the needle cover of the above preferred embodiment. Fig. 7 is a schematic view showing that the pressure receiving portion of the needle sleeve is pressed to push the hook. Figure 8 is a cross-sectional view showing the combination of the needle guard and the needle hub. Figure 9 is a cross-sectional view showing the latch of the needle sleeve removed from the needle hub. Figure 10 is a cross-sectional view showing the needle cover shielding the needle tip.

10‧‧‧ syringe

20‧‧‧Safety needle

22‧‧‧ needle seat

28‧‧‧Injection needle

282‧‧‧needle

30‧‧‧ needle sets

38‧‧‧ Spring

Claims (12)

A safety needle comprising: a needle holder for coupling to a syringe; an injection needle coupled to the needle holder and having a needle tip; and a needle sleeve detachably coupled to the needle holder and sleeve On the injection needle; and an elastic member disposed between the needle holder and the needle sleeve, one end of the elastic member is connected to the needle holder, and the other end is connected to the needle sleeve; wherein the needle sleeve is combined with the needle holder The elastic member is compressed, and when the needle holder is separated from the needle sleeve, the elastic member elastically recovers, and the needle sleeve is pushed toward the needle tip of the injection needle, so that the needle sleeve shields the needle tip; wherein the needle needle The seat has a first joint portion, the needle sleeve has a second joint portion, and the first joint portion is detachably coupled to the second joint portion; wherein the first joint portion includes a cassette; The second joint portion includes at least one hook detachably fastened to the cassette; the needle sleeve has at least one pressure receiving portion connected to the hook, and the pressure receiving portion is driven by an external force to drive the hook to be separated from the cassette; Wherein the latch has a second stop surface, and the second stop surface is respectively located at the needle Two opposite positions; the number of the at least one hook is two, and the two hooks are respectively located at two opposite positions on the needle sleeve, and the two hooks are detachably fastened to the second blocking surface; The number of the pressure receiving portions is two, and the two pressure receiving portions are respectively located on two sides of the axis of the needle sleeve and respectively have a connecting rib connecting the two hooks; when the two pressure receiving portions are deformed by external force, the driving The two-card hook expands outward and leaves the second stop. The safety needle according to claim 1, wherein the connecting ribs of the two pressure receiving portions are arched away from the axis of the needle sleeve. The safety needle according to claim 1, wherein the needle holder has a column tube, and the body of the injection needle passes through the column tube; the elastic member includes a spring, and the spring sleeve is sleeved on the column tube; When the sleeve is combined with the hub, the needle sleeve is sleeved on the column tube. The safety needle according to claim 3, wherein the needle sleeve comprises a set body, the inner wall of the sleeve body extends to form at least one hook portion, and the other end of the spring is connected to the hook portion. The safety needle according to claim 1, wherein the needle sleeve has a perforation for the injection needle to pass through; and when the needle sleeve shields the needle tip, the needle tip corresponds to a portion of the peripheral edge of the perforation. The safety needle according to claim 1, wherein the needle sleeve has a perforation for the injection needle to pass through; and when the needle sleeve shields the needle tip, an extension line of the long axial direction of the injection needle does not pass through the perforation. A safety syringe comprising: a syringe: a needle holder coupled to the syringe; an injection needle coupled to the needle holder and having a needle tip; and a needle sleeve detachably coupled to the needle holder And being disposed on the injection needle; and an elastic member disposed between the needle holder and the needle sleeve, one end of the elastic member is connected to the needle holder, and the other end is connected to the needle sleeve; wherein the needle sleeve and the needle sleeve are When the seat is coupled, the elastic member is compressed, and when the needle seat is separated from the needle sleeve, the elastic member elastically recovers, and the needle sleeve is pushed toward the needle tip of the injection needle, so that the needle sleeve shields the needle tip; The needle holder has a first joint portion, the needle sleeve has a second joint portion, and the first joint portion and the second joint portion are detachably coupled; The first joint portion includes a cassette; the second joint portion includes at least one hook detachably fastened to the cassette; the needle sleeve has at least one pressure receiving portion connected to the hook, the pressure receiving portion The hook is separated from the latch by an external force; wherein the latch has a second stop surface, and the second stop faces are respectively located at opposite positions on the needle seat; the number of the at least one hook is two And the two hooks are respectively located at two opposite positions on the needle sleeve, and the two hooks are detachably fastened to the second blocking surface; the number of the at least one pressure receiving portion is two, and the two pressure receiving portions are respectively located The two sides of the axis of the needle sleeve respectively have a connecting rib connecting the two hooks; when the two pressure receiving portions are deformed by external force, the two hooks are expanded outward to be separated from the second blocking surface. The safety syringe of claim 7, wherein the connecting ribs of the two pressure receiving portions are arched away from the axis of the needle sleeve. The safety syringe of claim 7, wherein the needle hub has a column tube, and the body of the injection needle is attached to the column tube; the elastic member includes a spring, the spring sleeve is sleeved on the column tube; When the sleeve is combined with the hub, the needle sleeve is sleeved on the column tube. The safety syringe of claim 9, wherein the needle sleeve comprises a set body, the inner wall of the sleeve body extending to form at least one hook portion, and the other end of the spring is connected to the hook portion. The safety syringe of claim 7, wherein the needle sleeve has a perforation for the injection needle to pass through; and when the needle sleeve shields the needle tip, the needle tip corresponds to a portion of the peripheral edge of the perforation. The safety syringe of claim 10, wherein the needle sleeve has a perforation for the injection needle to pass through; and when the needle sleeve shields the needle tip, an extension line of the long axial direction of the injection needle does not pass through the perforation.