TWI573605B - Safety needle - Google Patents

Description

Safety needle

This creation relates to a needle, especially a safety needle for connecting a syringe for injection purposes.

In order to reduce the risk of infection of medical personnel being pinned, it depends on the use of a safe needle. The composition of the existing needle mainly comprises a lancet and a lancet outer sheath, and the lancet outer sheath is sleeved on the outer side of the lancet. When the safety needle is used, the connecting portion of one end of the lance is sleeved at the front end of the needle barrel. When the needle is not injected, the outer sheath of the lance is sleeved outside the needle to prevent the needle from being inserted.

However, the aforementioned needle provides safety by using a lancet outer sheath that is sleeved on the outside of the lancet. However, it is difficult for the lancet outer sheath to prevent the insertion of the lancet during the needle transport or operation. Moreover, before and after the use of the needle, the appearance is difficult to distinguish whether it has been used, causing the medical staff to misuse the possibility of using the needle.

The main purpose of this creation is to provide a safety needle that solves the problem that it is difficult to completely prevent the insertion of the lancet during the transportation or operation of the existing safety needle, and it is difficult to distinguish whether the safety needle has been used or the like.

In order to achieve the foregoing, the safety needle proposed by the present invention comprises: a needle holder comprising a lancet joint, a syringe assembly and a casing portion, wherein the lancet joint has a lancet insertion hole therein. The syringe assembly portion is formed at a rear end of the lancet joint portion. The syringe assembly portion defines a syringe coupling hole that communicates with the lancet insertion hole. The outer casing portion is formed outside the lancet joint portion. Between the lancet joint portion and the lancet portion, an opening is formed at the front end of the outer casing portion, and an abutting portion is formed at the rear end of the outer casing portion and connects to the rear end of the lancet joint portion. Forming at least one locking guide groove, the locking guide groove includes a straight slot section, a guiding slot section and a locking slot section, the straight slot section extending axially along the outer casing portion, the locking slot section and the guiding slot The segments are respectively disposed at two sides of the front end of the outer casing portion, the rear end of the locking groove segment is at the front, the rear end of the guiding groove segment is rearward, and is respectively connected to the front end of the straight groove segment, and the locking groove segment is away from the straight groove segment. A locking recess is formed at the end, and the front end slot wall of the locking slot segment is an oblique slot wall inclined from a side of the middle portion of the guiding slot toward the locking recess, and the front portion of the guiding slot has an oblique slot wall. The oblique groove wall of the front section of the groove section is connected with the oblique groove wall of the locking groove section and opposite to each other; a needle is inserted into the needle insertion hole of the needle joint, and the needle is extended Out of the front end of the outer casing portion of the needle holder, the needle has a pinhole therein and communicates with the syringe coupling hole of the syringe assembly; and a safety cover is assembled to the front end of the needle holder, the safety cover The utility model comprises a lancet sheath, an elastic body and an outer sheath, wherein the lancet sheath forms a a through hole, a peripheral end surface of the lancet sheath forming at least one guide block, the front end of the elastic body being connected to the rear end of the lancet sheath, the outer sheath being integrally formed on the outer side of the lancet sheath, and the outer sheath The shell can be detached from the lancet sheath, the front end of the lancet sheath is located inside the outer sheath, the lancet sheath has a rear end of the guide block extending outside the rear end of the outer sheath, and the outer sheath The rear end has a spacing between the guide blocks of the lancet sheath, the elastic body of the safety cover extends into the movable space of the needle seat and is sleeved outside the lancet joint, and the rear end of the elastic body is connected to the outer shell The abutting portion of the portion is sleeved on the outer side of the lancet joint, the lancet sheath having the rear end of the guide block is located in the outer casing portion, and the guide block is located in the locking guide groove, the outer portion The rear end of the sheath can contact the front end of the outer casing of the needle holder, and the needle disposed at the front end of the needle holder is covered by the outer casing and the inner portion of the needle sheath.

The main features of the safety needle creation are as follows:

1. The guide block at the rear end of the lancet sheath of the safety needle is located at the beginning of the front end of the guiding groove section of the locking guide groove of the outer casing portion, and the rear end of the outer casing is positioned against the front end of the outer casing portion of the needle seat, so that the lancet protector Set of The limit is fixed in the outer casing, and the needle is covered in the needle sheath. Thereby, during the operation before the transport and the injection, the possibility of preventing the insertion of the lancet of the safety needle is made, and accordingly the safety needle is not used.

2. Before the injection, the user must first tear off the outer casing located outside the lancet sheath and detach it, and then the user will extend the front end of the lancet sheath of the safety needle connecting the syringe to the intended injection of the injected person. The part, on the way, the lancet sheath still covers the lancet, providing an excellent safety protection mechanism.

3. After the injection drug in the syringe is injected into the body of the injecting body, the needle barrel is pulled back, and the needle needle is pulled away from the body of the injecting body together with the needle, the needle sheath is ejected from the front end of the outer casing by the elasticity of the elastic body. So that the lancet is covered inside the lancet sheath, and when the lancet sheath is pushed forward by the elastic body elastic force, the guide block at the rear end of the lancet sheath moves forward from the straight groove section along the locking guide groove of the outer casing part and is subjected to The oblique groove wall at the front end of the locking groove is guided to enter the locking concave portion, and the locked needle sheath can no longer be retracted into the outer casing portion of the needle holder, ensuring that the needle is covered inside the needle sheath, and the safety needle can no longer be Used, and according to the distinction, the safety needle has been used.

The creation safety needle can further form a plurality of connecting portions at the rear end of the outer casing, the plurality of connecting portions are integrally formed on the outer circumferential surface of the lancet sheath, and the thickness of the connecting portion decreases toward the lancet sheath . Thereby, the outer casing can be detached from the needle sheath in a rotational tearing manner.

The creation safety needle can further have a sleeve portion of the needle holder having a sleeve portion, and a second screw projection formed at a rear end of the sleeve portion to form a radial direction, thereby combining the screw collar lock Fastened to the syringe.

The creation safety needle can further integrally form the elastic body of the safety cover on the rear end of the needle sheath, and the elastic body can be composed of one or a plurality of spiral elastic strips, so that the safety cover can be combined high. It is achieved by the application of drug resistance, high biocompatibility, high rigidity and high flexibility materials, and the assembly of the safety needle is simple.

The creation safety needle can further have two peripherally-shaped locking guide grooves on the peripheral wall of the outer casing portion, and the outer peripheral surface of the rear end of the lancet sheath forms two radial corresponding guide blocks, and the two guide blocks respectively extend into The two locks in the guide groove. In this way, the needle cover has better stability when moving in the needle holder.

10‧‧‧Safety needle

20‧‧‧Syringe

21‧‧‧Cylinder

22‧‧‧Putting

23‧‧‧ screw collar

30‧‧‧Needle seat

300‧‧‧Event space

31‧‧‧ Needle joint

311‧‧‧Spindle hole

32‧‧‧Syringe assembly

321‧‧‧Syringe coupling hole

322‧‧‧ casing department

323‧‧‧Screwed bumps

33‧‧‧ Shell Department

331‧‧‧ openings

332‧‧‧Apartment

333‧‧‧Locking guide

334‧‧‧ Straight slot

335‧‧‧ guiding slot

336‧‧‧Lock slot

337‧‧‧Lock recess

338‧‧‧ diagonal wall

40‧‧‧ Needle

50‧‧‧Safety cover

51‧‧‧ Needle sheath

512‧‧‧guide block

52‧‧‧ Elastomers

521‧‧‧ spiral elastic strip

53‧‧‧ outer casing

531‧‧‧Connecting Department

D‧‧‧ spacing

1 is a perspective view of a preferred embodiment of a preferred embodiment of the present safety needle.

Figure 2 is a cross-sectional view showing a preferred embodiment of the safety needle shown in Figure 1.

3 is a perspective exploded view of the preferred embodiment of the safety needle shown in FIG. 1.

4 is a perspective exploded view showing another viewing angle of the preferred embodiment of the safety needle shown in FIG. 1.

FIG. 5 is a perspective view of the preferred embodiment of the safety needle shown in FIG. 1 in combination with a screw collar on the syringe.

Figure 6 is a side cross-sectional view showing the preferred embodiment of the safety needle of Figure 1 in combination with a threaded collar locked to the barrel.

Figure 7 is a plan view showing the safety needle of the set of needle barrels shown in Figure 6 rotated and broken from the outer sheath and separated from the needle guard.

Figure 8 is a perspective view showing the safety needle of the set of needle barrels shown in Figure 7 after the outer sheath is removed.

Fig. 9 is a schematic cross-sectional view showing the needle of the safety needle shown in Fig. 8 piercing into the body of the injecting body, and pressing the syringe plunger to inject the medicament.

Fig. 10 is a side plan view showing the needle of the safety needle shown in Fig. 8 piercing into the body of the injecting body, and pressing the syringe plunger to inject the medicament.

Fig. 11 is a plan view showing the lancet sheath ejected from the front end of the outer casing portion by the elastic body after the lancet of the safety needle shown in Fig. 9 and Fig. 10 is withdrawn from the body of the injecting body.

Figure 12 is a front plan view of Figure 11.

Figure 13 is a schematic cross-sectional view showing the position of the face line A-A shown in Figure 12.

As shown in Figures 1 and 2, a preferred embodiment of the present safety needle 10 is disclosed for attachment to the front end of a syringe. The safety needle 10 includes a needle holder 30, a needle 40, and a safety cover 50.

As shown in FIG. 1 to FIG. 4, the needle holder 30 includes a lancet joint portion 31, a syringe assembly portion 32, and an outer casing portion 33. The lancet joint portion 31 has a lancet insertion hole 311 therein. The assembly portion 32 is formed at the rear end of the lancet joint portion 31. A syringe coupling hole 321 is formed in the syringe assembly portion 32. The syringe coupling hole 321 communicates with the rear end of the lancet insertion hole 311 of the lancet joint portion 31. The diameter of the syringe coupling hole 321 is larger than the diameter of the lancet insertion hole 311. The outer casing portion 33 is formed outside the lancet joint portion 31, and an active space 300 is formed between the outer casing portion 33 and the lancet joint portion 31, and the front end of the outer casing portion 33 is formed. An opening 331 defines an abutting portion 332 at the rear end of the outer casing portion 33. The abutting portion 332 connects the rear end of the lancet joint portion 31.

As shown in FIG. 1 to FIG. 4, the peripheral wall of the outer casing portion 33 further defines one or a plurality of locking guide grooves 333. In the preferred embodiment, the outer casing portion 33 has two locking guide grooves 333. The groove 333 is located in the radial direction of the peripheral wall of the outer casing portion 33. The locking channel 333 includes a straight slot section 334 , a guiding slot section 335 , and a locking slot section 336 . The straight slot section 334 extends substantially along the axial direction of the outer casing portion 33. The locking slot section 336 and the guiding slot section 335 are disposed on opposite sides of the front end of the outer casing portion 33, and the rear end of the locking slot section 336 is in front. The rear end of the guiding groove segment 335 is respectively connected to the front end of the straight groove segment 334, and the locking groove segment 336 is formed away from the end of the straight groove segment 334 to form a locking concave portion 337. The front end groove wall of the locking groove segment 336 is a self-guide groove segment. An oblique groove wall 338 whose one side of the middle portion of the 335 is inclined toward the locking concave portion 337, the front portion of the guiding groove portion 335 has an oblique groove wall, and the oblique groove wall of the front portion of the guiding groove portion 335 and the oblique direction of the locking groove portion 336 The groove walls 338 are connected and opposite to each other.

As shown in FIGS. 1 to 4, in the preferred embodiment, the syringe assembly portion 32 connected to the rear end of the lancet joint portion 31 is located outside the rear end of the abutment portion 332 of the outer casing portion 33. The syringe assembly 32 has a sleeve portion 322 and one of the rear ends of the sleeve portion 322 or a plurality of screw projections 323 for locking to the front end of a syringe in combination with a screw collar. . The number of the screwing projections 323 is set according to whether the screw holes in the threaded collar are single thread or double thread. In the preferred embodiment, the syringe assembly 32 has two radially corresponding screw projections 323 for mating the threaded collar 23 having a double thread.

As shown in FIG. 2 to FIG. 4, the lancet 40 has an axially extending pinhole. The rear end of the lancet 40 is inserted and fixed in the lancet insertion hole 311 of the lancet joint 31. Out of the front end of the outer casing portion 33 of the needle hub 30, the pinhole in the lancet 40 communicates with the syringe coupling hole 321 of the syringe assembly portion 32 through the lancet insertion hole 311.

As shown in FIG. 1 to FIG. 4, the safety cover 50 includes a lancet sheath 51, an elastic body 52 and an outer sheath 53. The lancet sheath 51 defines an axial through hole. The outer peripheral surface of the rear end of the sheath 51 is formed with one or a plurality of guiding blocks 512. In the preferred embodiment, the outer peripheral surface of the rear end of the lancet sheath 51 forms two radially corresponding guiding blocks 512, and the front end of the elastic body 52 is connected. The rear end of the lancet sheath 51. The outer casing 53 is disposed outside the lancet sheath 51, and the outer casing 53 is integrally formed with the lancet sheath 51. The front end of the lancet sheath 51 is located inside the outer casing 53, and the lancet sheath 51 has a guide block. The rear end of the 512 extends beyond the rear end of the outer casing 53, and the rear end of the outer casing 53 has a spacing D between the guide blocks 512 of the lancet sheath 51.

As shown in FIG. 1 to FIG. 4, the safety cover 50 is assembled to the front end of the needle holder 30. The elastic body 52 of the safety cover 50 extends into the movable space 300 of the needle holder 30. The elastic body 52 is sleeved. The shank portion 51 of the safety cover 50 is sleeved on the outer side of the lancet joint portion 31, and the lancet sheath 51 has a guide block. The rear end of the 512 is located in the outer casing portion 33, the guide block 512 is located in the locking guide groove 333, the rear end of the outer casing 53 approaches or contacts the front end of the outer casing portion 33 of the needle holder 30, and the lancet 40 provided at the front end of the needle holder 30 is covered by Outer casing 53 and lancet sheath 51 internal. The outer casing 53 can also be rotatably twisted on the lancet sheath 51 and detached from the lancet sheath 51, so that the lancet sheath 51 can be retracted into the outer casing portion 33 of the needle hub 30 at one time, compressing the elastic body 52 and The lancet 40 is extended, and the lancet sheath 51 can be ejected from the outer casing portion 33 by the elastic body 52, and the locking recess 337 on the side of the locking guide groove 333 of the outer casing portion 33 is locked, so that the lancet 40 is covered by the lancet protection In the sleeve 51, the locked needle guard 51 cannot be retracted into the outer casing portion 33 of the needle holder 30.

As shown in Figures 1 to 4, the elastomer 52 and the lancet sheath 51 can be integrally formed or each can be a separate component. In the preferred embodiment, the elastic body 52 is integrally formed at the rear end of the lancet sheath 51. The elastic body 52 includes one or a plurality of spiral elastic strips 521. In the preferred embodiment, the elastic body 52 includes a plurality of spiral elastic strips 521 connected to the rear end of the needle sheath 51. It has the flexibility of compression and recovery.

As shown in FIG. 1 to FIG. 4, in the preferred embodiment, the rear end of the outer casing 53 is formed with a plurality of connecting portions 531, and the connecting portion 531 is integrally formed on the outer circumferential surface of the lancet sheath 51, and The thickness of the connecting portion 531 is decreased toward the lancet sheath 51. As shown in FIG. 2 and FIG. 7, the outer casing 53 can be rotated on the lancet sheath 51 to be broken at a portion where the thickness of the lancet sheath 51 is thinned from the connecting portion 531, so that the outer casing 53 can be lanced. The sheath 51 is separated.

With regard to the use of the present safety needle 10, as shown in FIG. 5 and FIG. 6, the safety needle 10 is locked with a screw sleeve 23 at the rear end of the needle holder 30 in combination with a screw collar 23. The front end of the barrel 21 of the syringe 20 for injecting the drug. The guide block 512 at the rear end of the lancet sheath 51 of the safety needle 10 is located at the starting position of the front end of the guiding groove section 335 of the locking guide groove 333 of the outer casing portion 33, and the rear end of the outer casing 53 abuts against the needle holder 30. The front end of the outer casing portion 33 is positioned such that the lancet sheath 51 is restrained and fixed in the outer casing 53, and the lancet 40 is covered in the lancet sheath 51. Thus, during the operation prior to shipping and injection, the possibility of preventing the insertion of the lancet 40 of the safety needle 10, and thereby distinguishing the safety needle 10 from being used.

As shown in FIGS. 7 and 8, before the injection, the user first rotates and tears off the outer casing 53 located outside the lancet sheath 51, and detaches the outer casing 53 from the lancet sheath 51. Thereafter, the user extends the front end of the lancet sheath 51 of the safety needle 10 that connects the syringe 20 toward the predetermined injection site of the injected person, and the lancet sheath 51 still covers the lancet 40 in the middle to ensure safety.

As shown in FIGS. 9 and 10, until the distal end of the lancet sheath 51 contacts the skin of the injected person, and is pressed against the syringe 20, the lancet sheath 51 is pressed by the pressing force and retracted into the outer casing portion 33 of the needle hub 30. And compressing the elastic body 52, the lancet 40 extends out of the lancet sheath 51 and penetrates into the body of the subject. During this process, the lancet sheath 51 is moved rearwardly from the guiding groove section 335 to the straight groove section 334 along the locking guide groove 333 of the outer casing portion 33 by the guide block 512 at the rear end thereof, so that the lancet sheath 51 compresses the elastic body 52. . The pusher 22 of the syringe 20 is continuously pressed, and the injected drug in the syringe 20 is injected into the body of the subject through the needle joint portion 31 of the needle hub 30 and the needle 40.

As shown in FIG. 11 to FIG. 13, after the injection of the medicament to be injected is injected into the body of the injecting body, the syringe 20 is pulled back and pulled away from the body of the injected person together with the needle 40. At this time, the needle sheath 51 is made of the elastic body 52. Ejected from the front end of the outer casing portion 33, the lancet 40 is covered inside the lancet sheath 51, wherein the lancet sheath 51 is urged toward the front by the elastic body 52, and is guided along the guide block 512 at the rear end of the lancet sheath 51. The locking guide groove 333 of the outer casing portion 33 moves forward from the straight groove portion 334 and is guided by the oblique groove wall 338 at the front end of the locking groove portion 336 to enter the locking concave portion 337, and the locked needle sheath 51 can no longer be retracted to In the outer casing portion 33 of the needle hub 30, it is ensured that the lancet 40 is covered inside the lancet sheath 51, the safety needle 10 can no longer be used, and it is accordingly distinguished that the safety needle has been used.

10‧‧‧Safety needle

30‧‧‧Needle seat

300‧‧‧Event space

31‧‧‧ Needle joint

311‧‧‧Spindle hole

32‧‧‧Syringe assembly

321‧‧‧Syringe coupling hole

322‧‧‧ casing department

33‧‧‧ Shell Department

331‧‧‧ openings

332‧‧‧Apartment

335‧‧‧ guiding slot

40‧‧‧ Needle

50‧‧‧Safety cover

51‧‧‧ Needle sheath

512‧‧‧guide block

52‧‧‧ Elastomers

53‧‧‧ outer casing

531‧‧‧Connecting Department

D‧‧‧ spacing

Claims (8)

A safety needle comprises: a needle holder comprising a lancet joint, a syringe assembly and a casing portion, wherein the lancet joint has a lancet insertion hole formed therein a rear end of the lancet joint portion, the syringe assembly portion is formed with a syringe coupling hole that communicates with the lancet insertion hole, the outer casing portion is formed outside the lancet joint portion, and the outer casing portion and the lancet joint portion have a An opening is formed in the front end of the outer casing portion, an abutting portion is formed at the rear end of the outer casing portion and a rear end of the lancet joint portion is connected, and a peripheral wall of the outer casing portion forms at least one locking guide groove, and the locking guide groove comprises a straight groove a segment, a guiding groove segment and a locking groove segment extending axially along the outer casing portion, the locking groove segment and the guiding groove segment are respectively disposed on two sides of the front end of the outer casing portion, the locking groove The rear end of the segment is at the front, the rear end of the guiding groove segment is rearward and is respectively connected to the front end of the straight groove segment, and the locking groove segment forms a locking concave portion away from the end of the straight groove segment, and the front groove wall of the locking groove segment is One side of the self-guide groove section toward the lock An oblique groove wall inclined in the direction of the concave portion, the front portion of the guiding groove segment has an oblique groove wall, and the oblique groove wall of the front portion of the guiding groove segment is connected with the oblique groove wall of the locking groove segment and opposite to each other a lancet inserted into the lancet insertion hole of the lancet joint, and the lancet protrudes outside the front end of the outer casing of the needle seat, the needle has a pinhole and communicates with the needle of the syringe assembly a barrel engaging hole; and a safety cover that is coupled to the front end of the needle holder, the safety cover comprising a lancet sheath, an elastic body and an outer sheath, wherein the lancet sheath forms an axial through a hole, the outer peripheral surface of the rear end of the lancet sheath is formed with at least one guide block, the front end of the elastic body is connected to the rear end of the lancet sheath, and the outer sheath is integrally formed on the outer side of the lancet sheath, and the outer sheath can be self-retained The lancet sheath is detached and detached, and the front end of the lancet sheath is located inside the outer sheath, the lancet sheath has a rear end of the guide block extending outside the rear end of the outer sheath, and the rear end of the outer sheath is to the a spacing between the guide blocks of the lancet sheath, the elastic body of the safety cover extending into the needle The space holder and sleeved on the outer portion of the lancet in conjunction with, the elastomer connected to the rear end of the housing The abutting portion of the portion is sleeved on the outer side of the lancet joint, the lancet sheath having the rear end of the guide block is located in the outer casing portion, and the guide block is located in the locking guide groove, the outer portion The rear end of the sheath can contact the front end of the outer casing of the needle holder, and the needle disposed at the front end of the needle holder is covered by the outer casing and the inner portion of the needle sheath. The safety needle according to claim 1, wherein the peripheral wall of the outer casing portion has two locking guide grooves forming a radial direction, and the outer peripheral surface of the rear end of the lancet sheath forms two radially corresponding guide blocks, the two guides. The blocks extend into the two locking guides respectively. The safety needle according to claim 1, wherein the syringe assembly of the needle holder has a sleeve portion, and a second screw projection formed at a rear end of the sleeve portion to form a radial direction. The safety needle according to claim 2, wherein the syringe assembly of the needle holder has a sleeve portion, and a second correspondingly formed two screw projections are formed at the rear end of the sleeve portion. The safety needle according to any one of claims 1 to 4, wherein the rear end of the outer casing forms a plurality of connecting portions, the plurality of connecting portions are integrally formed on an outer circumferential surface of the lancet sheath, and the connection The thickness of the portion decreases toward the sheath of the needle. The safety needle according to any one of claims 1 to 4, wherein the elastic body is integrally formed at a rear end of the lancet sheath, and the elastic body comprises a spiral elastic strip. The safety needle according to any one of claims 1 to 4, wherein the elastic body is integrally formed at a rear end of the lancet sheath, and the elastic body comprises a plurality of spiral elastic strips. The safety needle according to claim 5, wherein the elastic body is integrally formed at a rear end of the lancet sheath, and the elastic body comprises a plurality of spiral elastic strips.