CN209827825U

CN209827825U - Safety self-destruction syringe

Info

Publication number: CN209827825U
Application number: CN201920445402.0U
Authority: CN
Inventors: 杨超
Original assignee: Chengdu Xinjin Shifeng Medical Instrument Co Ltd
Current assignee: Chengdu Xinjin Shifeng Medical Instrument Co Ltd
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2019-12-24
Anticipated expiration: 2029-04-03

Abstract

The utility model discloses a safe self-destruction syringe, including the barrel, install the push rod in the barrel, the plug has been cup jointed to the tip of push rod, and the interior intracavity of barrel tip installs interior needle file, and detachable installs the syringe needle on the interior needle file, and the end connection of barrel has the cover, the plug be provided with back-pull head chamber with the adjacent one end of interior needle file, interior needle file bottom shaping have asymmetric elasticity locking back-pull piece, asymmetric elasticity locking back-pull piece include the back-pull post, the bottom shaping of back-pull post has the back-pull head that can insert back-pull head chamber and realize the block locking. The syringe sets up asymmetric elasticity locking pull-back spare, sets up pull-back post and pull-back head in the bottom of needle file for the syringe is in the pull-back head intracavity of pull-back head insertion plug when using, realizes the block locking, draws back the syringe needle to the syringe barrel intracavity when the push rod is pulled back, and needle file bottom including the pull-back head sets up can not influence the setting of plug on the push rod, and production is convenient.

Description

Safety self-destruction syringe

Technical Field

The utility model belongs to the technical field of medical appliances, specifically speaking relates to a safe self-destruction syringe.

Background

A syringe is a device for injecting a liquid medicine or withdrawing a liquid, and is a device commonly used in hospitals or clinics. With the development of medical technology and the discovery of various infectious diseases, syringes have been defined as disposable medical supplies, i.e., syringes are discarded after a single use to reduce cross-contamination caused by the use of common syringes. The used syringe may also be reused by some lawless persons, causing disease transmission. Therefore, the self-destruction syringe can be produced at the same time.

The existing self-destruction syringe structure has the function of realizing needle retraction by using the barb, realizes that the barb for safe injection is mostly integrally formed with the push rod, and is not beneficial to the arrangement of a syringe rubber plug.

SUMMERY OF THE UTILITY MODEL

To foretell not enough among the prior art, the utility model provides a safe self-destruction syringe, syringe set up asymmetric elasticity locking pull back spare, set up pull back post and pull back head in the bottom of needle file including for the syringe is pull back head when using and inserts the pull back head intracavity of plug, realizes the block locking, draws back the syringe needle to the interior intracavity of needle cylinder when the push rod is drawn back, and needle file bottom including the pull back head sets up can not influence the setting of plug on the push rod, and production is convenient.

In order to achieve the above object, the utility model discloses a solution is: safe self-destruction syringe, including the barrel, install the push rod in the barrel, the tip of push rod has cup jointed the plug, and the needle file is installed to the inner chamber of barrel tip, and detachable installs the syringe needle on the needle file, and the end connection of barrel has the cover, the plug be provided with the pull-back head chamber with the adjacent one end of inner needle file, the shaping of inner needle base bottom have asymmetric elasticity locking pull-back spare, asymmetric elasticity locking pull-back spare include the pull-back post, the bottom shaping of pull-back post has the pull-back head that can insert pull-back head chamber and realize the block locking.

Furthermore, the rubber plug is provided with a rod head cavity with one end sleeved with the push rod, the rubber plug is sleeved on the rod head of the push rod, and the rod head is arranged in the rod head cavity.

Further, the inner needle base comprises an integrally formed conical head, an internal thread assembling portion, a base station, a connecting sheet and a pull-back column base, the internal thread assembling portion is formed at the top of the base station, the conical head is formed in a cavity of the internal thread assembling portion, the connecting sheet is formed at the bottom of the base station, the connecting sheet is connected with the base station and the pull-back column base, and a pull-back column is integrally formed at the bottom of the pull-back column base.

Furthermore, one side of the pull-back head is a locking part, the other side of the pull-back head is provided with a locking assisting sheet, and the top end of the locking assisting sheet is connected with the base station.

Furthermore, the middle part of the base station is sleeved with a sealing ring.

Furthermore, the needle head comprises an external thread assembling part, and a conical head cavity matched with the conical head is formed in the external thread assembling part.

Furthermore, the inner cavity of the cylinder cover is integrally formed with a clamping groove matched with the clamping convex edge at the end part of the cylinder body.

The utility model has the advantages that:

(1) the syringe sets up asymmetric elasticity locking pull-back spare, sets up pull-back post and pull-back head in the bottom of needle file for the syringe is in the pull-back head intracavity of pull-back head insertion plug when using, realizes the block locking, draws back the syringe needle to the syringe barrel intracavity when the push rod is pulled back, and needle file bottom including the pull-back head sets up can not influence the setting of plug on the push rod, and production is convenient.

Drawings

FIG. 1 is a schematic view of the structure of the syringe barrel of the present invention;

FIG. 2 is a schematic view of the structure of the syringe needle of the present invention;

FIG. 3 is an enlarged schematic cross-sectional view of the needle of the present invention;

FIG. 4 is a schematic view of the structure of the push rod of the syringe of the present invention;

FIG. 5 is a schematic view of the structure of the syringe piston of the present invention;

FIG. 6 is a sectional view of the piston A-A of the present invention;

FIG. 7 is a schematic view of the structure of the syringe of the present invention;

FIG. 8 is a schematic sectional view of the syringe of the present invention;

FIG. 9 is a schematic view of the structure of the cover of the present invention;

FIG. 10 is a cross-sectional view of the cover B-B of the present invention;

fig. 11 is a schematic structural view of the inner needle base of the present invention;

fig. 12 is a schematic side view of the inner needle holder of the present invention;

FIG. 13 is a schematic cross-sectional view of the inner needle holder of the present invention;

FIG. 14 is a schematic view of the present invention in use;

in the figure, 1-barrel, 2-push rod, 3-rubber plug, 4-inner needle base, 5-barrel cover, 6-external thread assembly part, 7-needle head, 8-pull-back head cavity, 9-rod head cavity, 10-clamping groove, 11-needle stem, 12-conical head, 13-sealing ring, 14-pull-back column, 15-pull-back head, 16-locking assisting sheet, 17-internal thread assembly part, 18-connecting sheet, 19-pull-back column platform, 20-rod head, 21-conical head cavity.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

as shown in fig. 1, fig. 2, fig. 9 and fig. 14, the safe self-destruction syringe comprises a barrel 1, a push rod 2 is installed in the barrel 1, a rubber plug 3 is sleeved on the end part of the push rod 2, an inner needle seat 4 is installed in an inner cavity of the end part of the barrel 1, a needle head 7 is detachably installed on the inner needle seat 4, a barrel cover 5 is connected to the end part of the barrel 1, a pull-back head cavity 8 is arranged at one end of the rubber plug 3 adjacent to the inner needle seat 4, an asymmetric elastic locking pull-back piece is formed at the bottom of the inner needle seat 4 and comprises a pull-back column 14, and a pull-back head 15 capable of being inserted into the pull-back head cavity 8 to realize clamping locking is formed at the bottom end of the pull-. After the injection is finished, the pull-back head 15 on the inner needle seat 4 is inserted into the pull-back head cavity 8 of the rubber plug 3, and when the push rod 2 is pulled back, the pull-back head 15 drives the inner needle seat 4 to move towards the syringe barrel 1.

As shown in fig. 4 to 6, a rod cavity 9 is arranged at one end of the rubber plug 3 sleeved with the push rod 2, the rubber plug 3 is sleeved on a rod head 20 of the push rod 2, and the rod head 20 is arranged in the rod cavity 9.

As shown in fig. 11 to 13, the inner needle base 4 includes an integrally formed conical head 12, an internal thread fitting portion 17, a base, a connecting piece 18 and a pull-back post 19, the internal thread fitting portion 17 is formed at the top of the base, the conical head 12 is formed in a cavity of the internal thread fitting portion 17, the connecting piece 18 is formed at the bottom of the base, the connecting piece 18 connects the base and the pull-back post 19, the pull-back post 14 is integrally formed at the bottom of the pull-back post 19, and the pull-back head 15 is formed at the bottom end of the pull-back post 14. One side of the pull-back head 15 is a locking part, the other side is formed with a locking aid piece 16, and the top end of the locking aid piece 16 is connected with the base station. When the syringe is used, the push rod 2 is pushed to realize injection, when the push rod 2 is pushed to abut against the inner needle seat 4, the locking part of the pull-back head 15 on the inner needle seat 4 is inserted into the pull-back head cavity 8 of the rubber plug 3 firstly, the locking assisting plate 16 is beneficial to the insertion of the whole pull-back head 15 into the pull-back head cavity 8, when the push rod 2 is pulled back, the pull-back head 15 drives the inner needle seat 4 to move towards the inside of the syringe barrel 1, the locking part is used as a main stress part in the pull-back process, so that the stress of the inner needle seat 7 is asymmetric, the needle 7 inclines towards one side of the locking part in the pull-back process, and the needle stem 11 is in contact with.

Furthermore, the middle part cover of base station be equipped with sealing ring 13, with inner needle seat 4 and cylinder sealed, avoid the injection seepage.

As shown in fig. 2 and fig. 3, the needle 7 includes an external thread assembling portion 6, the external thread assembling portion 6 is provided with a conical cavity 21 matched with the conical head 12, when the needle 7 is installed, the conical cavity 21 is butted with the conical head 12, and then the needle 7 is rotated, so that the external thread assembling portion 6 of the needle 7 is fixed to the internal thread assembling portion 17 on the inner needle 7 seat in a threaded connection manner.

As shown in fig. 7 to 10, the inner cavity of the cover 5 is integrally formed with a locking groove 10 matching with the locking ridge at the end of the cylinder 1, so as to fix and lock the cover 5 on the cylinder 1.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. Safe self-destruction syringe, including barrel (1), install push rod (2) in barrel (1), plug (3) have been cup jointed to the tip of push rod (2), and interior needle file (4) are installed to the intracavity of barrel (1) tip, and detachable installs syringe needle (7) on interior needle file (4), and the end connection of barrel (1) has cover (5), its characterized in that: the one end that plug (3) and inner needle seat (4) are adjacent be provided with pull-back head chamber (8), inner needle seat (4) bottom shaping have asymmetric elasticity locking pull-back spare, asymmetric elasticity locking pull-back spare include pull-back post (14), the bottom shaping of pull-back post (14) has pull-back head (15) that can insert pull-back head chamber (8) and realize the block locking.

2. The safety self-destructive syringe according to claim 1, wherein: one end of the rubber plug (3) which is sleeved with the push rod (2) is provided with a rod head cavity (9), the rubber plug (3) is sleeved on a rod head (20) of the push rod (2), and the rod head (20) is arranged in the rod head cavity (9).

3. The safety self-destructive syringe according to claim 2, wherein: interior needle file (4) including integrated into one piece's conical head (12), internal thread assembly portion (17), base station, connection piece (18) and pull-back stylesheet (19), internal thread assembly portion (17) shaping at the top of base station, the intracavity of internal thread assembly portion (17) including conical head (12) shaping, connection piece (18) shaping is in the bottom of base station, connection piece (18) realize the connection of base station and pull-back stylesheet (19), the bottom integrated into one piece of pull-back stylesheet (19) have pull-back post (14).

4. A safety self-destructive syringe according to claim 3, characterized in that: one side of the pull-back head (15) is a locking part, the other side of the pull-back head is provided with a locking assisting sheet (16), and the top end of the locking assisting sheet (16) is connected with the base station.

5. A safety self-destructive syringe according to claim 3, characterized in that: the middle part of the base station is sleeved with a sealing ring (13).

6. A safety self-destructive syringe according to claim 3, characterized in that: the needle head (7) comprises an external thread assembling part (6), and a conical head cavity (21) matched with the conical head (12) is formed in the external thread assembling part (6).

7. The safety self-destructive syringe according to claim 5, wherein: the inner cavity of the cylinder cover (5) is integrally formed with a clamping groove (10) matched with the clamping convex edge at the end part of the cylinder body (1).