CN215194571U

CN215194571U - Syringe with retractable needle assembly

Info

Publication number: CN215194571U
Application number: CN202121324763.3U
Authority: CN
Inventors: 严彩君; 彭爱霞
Original assignee: Dongguan Polytechnic
Current assignee: Dongguan Polytechnic
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2021-12-17
Anticipated expiration: 2031-06-15

Abstract

The utility model discloses an injector with scalable syringe needle subassembly, including the cylinder, the inside of cylinder is provided with the piston rod, the bottom of cylinder is provided with the needle file, the bottom of needle file is connected with the syringe needle, the inside of piston rod is the cavity setting, the bottom of piston rod is provided with the fixed block, the last fixed surface of fixed block is connected with the compression pole, the surface cover of compression pole is equipped with the second spring, the top of second spring and the top fixedly connected with bullet piece of compression pole. The utility model discloses can make syringe needle automatic withdrawal press the depression bar inside through pressing the press head after syringe injection is accomplished to operating personnel plays the possibility of avoiding appearing the syringe by the secondary use simultaneously by stabbing, and through the regulation section of thick bamboo that sets up, only needs to rotate the regulation section of thick bamboo, can adjust the length that the syringe needle stretches out, so that according to the degree of depth of piercing of actual demand control syringe needle, has certain practicality.

Description

Syringe with retractable needle assembly

Technical Field

The utility model relates to the technical field of medical tools, in particular to an injector with a retractable needle assembly.

Background

Syringes play a wide and important role in clinical treatment as one of the most commonly used medical tools in the medical field. The needle head of the existing syringe does not have scalability, so the needle head is easy to accidentally prick an operator after the syringe is used, and the operator is infected, and the existing injection needle generally adopts the needle head with fixed length, in some surgical operations or bone marrow puncture, because the depths of target injection or liquid extraction parts are different, the needle heads with different lengths need to be selected, and different individuals have differences, but the existing injection needle can not be suitable for different individuals and different operation means, and if the length of the needle head is not enough in the operation process, the longer syringe needs to be replaced, and the process causes repeated puncture, and causes discomfort to patients.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects in the prior art and providing a syringe with a retractable needle component.

In order to achieve the above purpose, the utility model adopts the following technical scheme: syringe with scalable syringe needle subassembly, including the cylinder, the inside of cylinder is provided with the piston rod, the bottom of cylinder is provided with the needle file, the bottom of needle file is connected with the syringe needle, the inside of piston rod is the cavity setting, the bottom of piston rod is provided with the fixed block, the last fixed surface of fixed block is connected with the compression pole, the surface cover of compression pole is equipped with the second spring, the top of second spring and the top fixedly connected with bullet piece of compression pole, the outside cover of bullet piece is equipped with solid fixed ring, be connected with the link plate between solid fixed ring and the bullet piece, the inside of piston rod is provided with presses the depression bar, the fluting has been seted up to the inside of pressing the depression bar, the bottom of pressing the depression bar is provided with the cutting knife tip, the outside fixedly connected with press the press head that the one end that the cutting knife tip was kept away from to the piston rod to the depression bar.

Furthermore, an annular internal thread groove is formed in the outer wall of one end, close to the needle head, of the needle cylinder, an adjusting cylinder in threaded connection with the internal thread groove is arranged in the internal thread groove, and one end of the adjusting cylinder extends to the outside of the internal thread groove.

Further, the lower surface of the fixed block is fixedly connected with a clamping point, two side walls of the clamping point are provided with convex blocks, and two inner side walls of the needle seat are provided with grooves matched with the convex blocks.

Furthermore, the outer surface of one end of the pressing rod, which is far away from the piston rod, is sleeved with a first spring, and two ends of the first spring are fixedly connected with the lower surface of the pressing head and the top end of the piston rod respectively.

Furthermore, a pressing plate is fixedly connected to the side wall of one end, far away from the needle cylinder, of the piston rod.

Furthermore, one end of the adjusting cylinder, which is positioned outside the internal thread groove, is fixedly connected with a poking block.

Further, one end of the second spring, which is far away from the elastic block, is in contact with the inner bottom wall of the piston rod.

The utility model has the advantages that:

the utility model discloses can make syringe needle automatic withdrawal press the depression bar inside through pressing the press head after syringe injection is accomplished to operating personnel plays the possibility of avoiding appearing the syringe by the secondary use simultaneously by stabbing, and through the regulation section of thick bamboo that sets up, only needs to rotate the regulation section of thick bamboo, can adjust the length that the syringe needle stretches out, so that according to the degree of depth of piercing of actual demand control syringe needle, has certain practicality.

Drawings

FIG. 1 is a general schematic view of a syringe with a retractable needle assembly according to the present invention;

fig. 2 is a front cross-sectional view of a syringe with a retractable needle assembly of the present invention.

Fig. 3 is an internal structural view of a piston rod with a retractable needle assembly according to the present invention;

FIG. 4 is an enlarged view of A of the syringe with retractable needle assembly of the present invention;

fig. 5 is an enlarged view of B of the syringe with a retractable needle assembly of the present invention.

Illustration of the drawings:

1. a needle cylinder; 2. a piston rod; 3. an adjusting cylinder; 4. a needle head; 5. a pressing lever; 6. a first spring; 7. a pressing head; 8. pressing a plate; 9. a compression rod; 10. a second spring; 11. a fixed block; 12. cutting the tool tip; 13. a spring block; 14. a fixing ring; 15. connecting plates; 16. a needle seat; 17. clipping the tip; 18. a bump; 19. a groove; 20. a shifting block; 21. grooving; 22. an internal thread groove.

Detailed Description

Fig. 1 to 5 show, relate to syringe with scalable syringe needle subassembly, including cylinder 1, the inside of cylinder 1 is provided with piston rod 2, the bottom of cylinder 1 is provided with needle file 16, the bottom of needle file 16 is connected with syringe needle 4, the inside of piston rod 2 is the cavity setting, the bottom of piston rod 2 is provided with fixed block 11, the last fixed surface of fixed block 11 is connected with compression rod 9, the surface cover of compression rod 9 is equipped with second spring 10, the top of second spring 10 and the top fixedly connected with bullet piece 13 of compression rod 9, the outside cover of bullet piece 13 is equipped with solid fixed ring 14, be connected with link plate 15 between solid fixed ring 14 and the bullet piece 13, the inside of piston rod 2 is provided with pressing bar 5, fluting 21 has been seted up to pressing bar 5's inside, the bottom of pressing bar 5 is provided with cutting knife tip 12, the one end that pressing bar 5 kept away from cutting knife tip 12 extends to the outside fixedly connected with pressing head 7 of piston rod 2.

During the use, when the depth of penetration of syringe needle 4 is adjusted to needs, rotate and dial piece 20 and make an adjusting cylinder 3 rotate, adjust a cylinder 3 and rotate and remove downwards, cover partly syringe needle 4's length, make syringe needle 4 shorten when syringe needle 4 pierces, it pushes away the medicine to go on pushing down through clamp plate 8 after stabbing, card point 17 card goes into the inside of needle file 16 after the liquid medicine has pushed away, and firmly fix through lug 18, later the operator only needs to press pressing head 7 and makes first spring 6 compress, cutting knife point 12 cuts off connecting plate 15, bounce fast under the effect of the restoring force of second spring 10 compression, drive syringe needle 4, needle file 16, card point 17, fixed block 11, bullet piece 13, the inside of compressing rod 9 and second spring 10 itself bullet income fluting 21 realizes retracting.

In a further scheme, an annular internal thread groove 22 is formed in the outer wall of one end, close to the needle 4, of the needle cylinder 1, an adjusting cylinder 3 in threaded connection with the internal thread groove 22 is arranged inside the internal thread groove 22, and one end of the adjusting cylinder 3 extends to the outside of the internal thread groove 22.

In a further scheme, a clamping point 17 is fixedly connected to the lower surface of the fixing block 11, two side walls of the clamping point 17 are provided with convex blocks 18, and two inner side walls of the needle seat 16 are provided with grooves 19 matched with the convex blocks 18 so as to be clamped into the needle seat 16 and drive the needle head 4 to retract into the open groove 21.

In the further scheme, the outer surface of one end of the pressing rod 5, which is far away from the piston rod 2, is sleeved with a first spring 6, and the two ends of the first spring 6 are respectively fixedly connected with the lower surface of the pressing head 7 and the top end of the piston rod 2, so that the connecting plate 15 is conveniently pressed downwards and cut off.

In a further scheme, a pressing plate 8 is fixedly connected to the side wall of one end, far away from the needle cylinder 1, of the piston rod 2, so that medicine pushing is facilitated.

In a further scheme, one end of the adjusting cylinder 3, which is located outside the internal thread groove 22, is fixedly connected with a toggle block 20, which is convenient for driving the adjusting cylinder 3 to rotate.

In a further embodiment, an end of the second spring 10 remote from the elastic block 13 is in contact with an inner bottom wall of the piston rod 2, so as to provide a recoil force to the compressed second spring 10.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. Syringe with scalable syringe needle subassembly, including cylinder (1), its characterized in that: the needle cylinder is characterized in that a piston rod (2) is arranged inside the needle cylinder (1), a needle seat (16) is arranged at the bottom end of the needle cylinder (1), a needle head (4) is connected to the bottom end of the needle seat (16), the piston rod (2) is arranged in a hollow mode, a fixing block (11) is arranged at the bottom end of the piston rod (2), a compression rod (9) is fixedly connected to the upper surface of the fixing block (11), a second spring (10) is sleeved on the outer surface of the compression rod (9), an elastic block (13) is fixedly connected to the top end of the second spring (10) and the top end of the compression rod (9), a fixing ring (14) is sleeved outside the elastic block (13), a connecting plate (15) is connected between the fixing ring (14) and the elastic block (13), a pressing rod (5) is arranged inside the piston rod (2), and a slot (21) is formed inside the pressing rod (5), the bottom of the pressing rod (5) is provided with a cutting knife tip (12), and one end of the pressing rod (5) far away from the cutting knife tip (12) extends to the outside of the piston rod (2) and is fixedly connected with a pressing head (7).

2. The syringe with retractable needle assembly of claim 1, wherein: the needle cylinder is characterized in that an annular inner thread groove (22) is formed in the outer wall of one end, close to the needle head (4), of the needle cylinder (1), an adjusting cylinder (3) in threaded connection with the inner thread groove (22) is arranged in the inner thread groove, and one end of the adjusting cylinder (3) extends to the outside of the inner thread groove (22).

3. The syringe with retractable needle assembly of claim 1, wherein: the lower surface fixedly connected with card point (17) of fixed block (11), the both sides wall of card point (17) all is provided with lug (18), recess (19) that agree with mutually with lug (18) are seted up to two inside walls of needle file (16).

4. The syringe with retractable needle assembly of claim 1, wherein: the outer surface of one end, far away from the piston rod (2), of the pressing rod (5) is sleeved with a first spring (6), and two ends of the first spring (6) are fixedly connected with the lower surface of the pressing head (7) and the top end of the piston rod (2) respectively.

5. The syringe with retractable needle assembly of claim 1, wherein: and a pressing plate (8) is fixedly connected to the side wall of one end, far away from the needle cylinder (1), of the piston rod (2).

6. The syringe with retractable needle assembly of claim 2, wherein: one end of the adjusting cylinder (3) positioned outside the internal thread groove (22) is fixedly connected with a poking block (20).

7. The syringe with retractable needle assembly of claim 1, wherein: one end of the second spring (10) far away from the elastic block (13) is contacted with the inner bottom wall of the piston rod (2).