CN111888576B

CN111888576B - Medical syringe

Info

Publication number: CN111888576B
Application number: CN202010777620.1A
Authority: CN
Inventors: 王萍萍; 王小燕; 黄鹏; 翟万田
Original assignee: Individual
Current assignee: Wang Pingping
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2021-05-07
Anticipated expiration: 2040-08-05
Also published as: CN111888576A

Abstract

The invention provides a medical injector. The rubber plug comprises a sleeve, a push rod arranged in the sleeve and a rubber plug arranged at the end part of the push rod, wherein an injection head is arranged at the end part of the sleeve, a flanging extending outwards is arranged at the end part of the sleeve departing from the injection head, the rubber plug also comprises a touch piece, a threaded hole is arranged on the flanging, the touch piece comprises a touch head and a threaded rod connected to the touch head, the threaded rod is in threaded connection with the threaded hole, and the length direction of the touch piece is perpendicular to the length direction of the sleeve. Through above-mentioned technical scheme, when the push rod needs great thrust, the rotatory contact piece of accessible, threaded rod and screw hole on the contact piece are mutually supported, and the contact piece can stick out in the turn-ups lateral wall more, provides bigger area of contact for the user, and then reduces the whole degree of difficulty of push-and-pull propelling movement pole.

Description

Medical syringe

Technical Field

The present invention relates to medical injection devices, and in particular, to a medical injector.

Background

The structure of the existing injector is mainly provided with a sleeve, a pintle is arranged in the sleeve, the pintle comprises a push rod, a sealing ring and a handle, the sealing ring and the handle are respectively arranged at two ends of the push rod, and the sealing ring is arranged in the sleeve. Through application of force in the handle, the push rod can push the sealing ring to slide along the inside of the sleeve in a sealing manner.

The sleeve tip of above-mentioned syringe still is provided with the turn-ups of outside extension, and this turn-ups can offset with user's finger, and then helps promoting the push rod and remove, but the turn-ups length of traditional syringe tip is fixed, and when needs great thrust, the turn-ups of traditional fixed dimension can't provide enough big supporting area, and the push rod removes comparatively difficultly.

Disclosure of Invention

In view of this, the present invention provides a medical injector, which can adjust the distance between the contact element and the flange according to actual needs, so as to increase the original effective contact area of the flange, and further reduce the overall difficulty of pushing and pulling the push rod.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a medical injector comprises a sleeve, a push rod arranged in the sleeve and a rubber plug arranged at the end part of the push rod, wherein the end part of the sleeve is provided with an injection head, the end part of the sleeve, which is far away from the injection head, is provided with a flanging extending outwards,

still include the piece of conflicting, be equipped with the screw hole on the turn-ups, the piece of conflicting is including conflicting the contact and connecting the threaded rod on conflicting the head, threaded rod threaded connection is in the screw hole, the telescopic length direction of length direction perpendicular to of the piece of conflicting.

Through above-mentioned technical scheme, when the push rod needs great thrust, the rotatory contact piece of accessible, threaded rod and screw hole on the contact piece are mutually supported, and the contact piece can stick out in the turn-ups lateral wall more, provides bigger area of contact for the user, and then reduces the whole degree of difficulty of push-and-pull propelling movement pole.

Preferably, be equipped with annular holding tank on the turn-ups lateral wall, the holding tank is concentric in the screw hole and is located the outside of screw hole, the overhead rubber circle of installing of conflict, the rubber circle slides and connects in the holding tank.

Through the technical scheme, when the pushing rod is pushed out from the outer side wall of the flanging, the rubber ring can be pulled out along with the pushing rod, and the rubber ring is wrapped on the outer side wall of the threaded rod of the pushing rod, so that the use comfort of a user is improved; otherwise, when the propelling movement pole pushed in from the turn-ups lateral wall, the rubber circle can remove to the holding tank in, convenient whole accomodating.

Preferably, demountable installation has first barrel casing in the sleeve, first barrel casing with be equipped with first sealing washer between the sleeve, first barrel casing is close to the tip of injection head and is equipped with first chamfer, leave the clearance between plug lateral wall and the sleeve inner wall, an organic whole is equipped with the rubber bulge loop on the plug lateral wall, the rubber bulge loop offsets with telescopic inner wall.

Through the technical scheme, when smaller drawing force is needed, the first sleeve does not need to be installed in the sleeve, and the drawing of the injection can be realized only by virtue of the sealing extrusion force between the rubber convex ring and the inner wall of the sleeve;

when a large drawing force is needed, a first sleeve is required to be installed in the sleeve, when the rubber plug moves to the position of the first sleeve, a large extrusion force is generated between the rubber convex ring and the first sleeve to generate deformation, and at the moment, the outer side wall of the rubber plug is also abutted against the inner sleeve wall of the first sleeve, so that the effective contact area between the rubber plug and the rubber convex ring and the first sleeve is increased, and a stronger drawing force can be generated on the injection liquid;

the two using states can adjust the effective sealing contact area between the rubber plug and the first sleeve according to the actual drawing force required by the corresponding injection, thereby being beneficial to relieving the problem of hand ache of medical personnel after long-term operation and effectively reducing the operation difficulty;

in addition, be equipped with first sealing washer between first barrel casing and the sleeve, first sealing washer can increase the connection stability between first barrel casing and the sleeve, and first sealing washer also can restrict the injection in the sleeve and reveal from between first barrel casing and the sleeve.

Preferably, a gap is reserved between the end part of the first sleeve close to the injection head and the end part of the sleeve close to the injection head, and the rubber convex ring can be positioned in the gap and abut against the wall of the sleeve.

Through above-mentioned technical scheme, when first barrel casing was installed in the sleeve, toward the injection head direction promotion plug, the rubber bulge loop on the plug can be fully extruded the remaining injection in the interval.

Preferably, a cavity is arranged in the rubber convex ring.

Through above-mentioned technical scheme, when producing the extrusion force between rubber bulge loop and the first barrel casing, the relative deformation of the rubber bulge loop that is provided with the cavity is more smooth and easy, helps promoting the smooth and easy degree of rubber bulge loop when first chamfer.

Preferably, the first sleeve is internally sleeved with a second sleeve, and a second chamfer is arranged at the end part, close to the injection head, of the second sleeve.

Through the technical scheme, the first barrel sleeve and the second barrel sleeve are simultaneously positioned in the barrel sleeve, the wall thickness in the whole barrel sleeve is increased to be the thickest, at the moment, the extrusion force generated between the rubber plug and the inner barrel wall of the second barrel sleeve is the largest, the effective contact area between the rubber plug and the rubber convex ring and the second barrel sleeve is the largest, and at the moment, the push rod is pulled, so that the sealing performance generated between the rubber plug and the rubber convex ring and the second barrel sleeve is stronger, and the medical suction sleeve is suitable for a medical environment with higher suction force requirements;

in addition, the first chamfer and the second chamfer are mutually matched, and the rubber convex ring can smoothly move back and forth among the interval, the first chamfer and the second chamfer.

Preferably, be equipped with the passageway of sliding in the first sleeve, the passageway one end of sliding runs through in the tip that first sleeve is close to in the injection head, the passageway other end of sliding runs through in the tip that first sleeve deviates from the injection head, the sliding is provided with the self-destruction needle in the passageway of sliding, the syringe needle of self-destruction needle just is used for pricking in the plug towards injection head one side.

Through the technical scheme, after the injection syringe is used, the rubber plug is pushed to one side close to the injection head, then, a user pushes the self-destruction needle, the needle head of the self-destruction needle is pricked into the rubber plug, the structure of the rubber plug can be further damaged, the injection sealing performance of the whole injection syringe can be damaged, and the whole injection syringe can not be reused.

Preferably, the needle head of the self-destruction needle is aligned with the rubber bulge loop where the cavity is located and can be inserted into the cavity.

Through above-mentioned technical scheme, in the cavity can be pricked into to the syringe needle of self-destruction needle, not only the structural failure of rubber bulge loop is easier, and the structural failure degree of whole plug is bigger moreover.

Preferably, a second sealing ring is arranged between the self-destruction needle and the sliding channel.

Through above-mentioned technical scheme, the second sealing washer can not only promote the stability of being connected between self-destruction needle and the passageway that slides, can guarantee the leakproofness between self-destruction needle and the passageway that slides moreover.

Preferably, one end of the self-destruction needle, which is far away from the needle head, protrudes out of the channel opening of the sliding channel, and a protective groove for accommodating one end of the self-destruction needle, which is far away from the needle head, is arranged on the second barrel sleeve.

Through the technical scheme, when the first sleeve and the second sleeve are both positioned in the sleeve, the sheath can be covered at one end of the self-destruction needle, which is away from the needle head, so that the self-destruction needle is prevented from being pushed to move accidentally; when the self-destruction needle needs to be pushed to move, force can be applied to the end part of the self-destruction needle protruding out of the channel opening of the sliding channel, and the operation is convenient and fast.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

fig. 4 is an enlarged view of a portion C of fig. 3.

Reference numerals: 1. a sleeve; 2. a push rod; 3. a rubber plug; 4. an injection head; 5. a first sleeve; 6. a first seal ring; 7. a first chamfer; 8. a rubber convex ring; 9. a gap; 10. spacing; 11. a cavity; 12. a second sleeve; 13. a second chamfer; 14. a slipping channel; 15. a self-destruction needle; 16. a second seal ring; 17. flanging; 18. a threaded hole; 19. a contact member; 191. abutting against the contact; 192. a threaded rod; 20. accommodating grooves; 21. a rubber ring; 22. and (4) protecting the groove.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings 1-4 to make the technical solution of the present invention easier to understand and grasp.

A medical injector comprises a sleeve 1, a push rod 2 arranged in the sleeve 1 and a rubber plug 3 arranged at the end part of the push rod 2, wherein an injection head 4 is arranged at the end part of the sleeve 1. The push rod 2 can be pulled to drive the rubber plug 3 in the sleeve 1 to move, and the injection can be sucked or ejected from the injection head 4.

The end of the sleeve 1, which is away from the injection head 4, is provided with a flange 17 extending outwards, and further comprises a contact 19, the flange 17 is provided with a threaded hole 18, the contact 19 comprises a contact 191 and a threaded rod 192 connected to the contact 191, the threaded rod 192 is in threaded connection with the threaded hole 18, and the length direction of the contact 19 is perpendicular to the length direction of the sleeve 1. In that

Be equipped with annular holding tank 20 on the turn-ups 17 lateral wall, holding tank 20 is concentric in screw hole 18 and is located the outside of screw hole 18, installs rubber circle 21 on the conflict head 191, and rubber circle 21 slides and connects in holding tank 20.

A first sleeve 5 is installed in the sleeve 1, a first sealing ring 6 is arranged between the first sleeve 5 and the sleeve 1, and the first sealing ring 6 generates elastic extrusion force between the first sleeve 5 and the sleeve 1.

The end part of the first sleeve 5 close to the injection head 4 is provided with a first chamfer 7, and a gap 9 is reserved between the outer side wall of the rubber plug 3 and the inner wall of the sleeve 1. A rubber convex ring 8 is integrally arranged on the outer side wall of the rubber plug 3, and the rubber convex ring 8 is abutted to the inner cylinder wall of the sleeve 1.

A space 10 is left between the end of the first sleeve 5 close to the injection head 4 and the end of the sleeve 1 close to the injection head 4, and the rubber convex ring 8 can be positioned in the space 10 and abut against the wall of the sleeve 1.

In addition, a cavity 11 is provided in the rubber collar 8.

A second sleeve 12 is sleeved in the first sleeve 5, and a second chamfer 13 is arranged at the end part of the second sleeve 12 close to the injection head 4.

When both the first sleeve 5 and the second sleeve 12 are mounted inside the sleeve 1, see fig. 3, the interval 10 between the end of the first sleeve 5 close to the injection head 4 and the end of the sleeve 1 close to the injection head 4 is a, and the interval 10 between the end of the second sleeve 12 close to the injection head 4 and the end of the sleeve 1 close to the injection head 4 is b, where a is smaller than b.

In addition, be equipped with the passageway 14 that slides in first sleeve 1, the tip that is close to the injection head 4 in first sleeve 1 is run through to the passageway 14 one end that slides, and the passageway 14 other end that slides runs through in the tip that first sleeve 1 deviates from injection head 4, and the passageway 14 internal slipping that slides is provided with self-destruction needle 15, and the syringe needle of self-destruction needle 15 just is used for pricking in the plug 3 towards injection head 4 one side. A second sealing ring 16 is arranged between the self-destruction needle 15 and the sliding channel 14.

In addition, one end of the self-destruction needle 15, which faces away from the needle head, protrudes out of the channel opening of the sliding channel 14, and a protective groove 22 for accommodating one end of the self-destruction needle 15, which faces away from the needle head, is arranged on the second sleeve 12.

In the actual use process:

(1) according to the specific medical care environment, when the drawing force of the needle cylinder is relatively small, the first cylinder sleeve 5 and the second cylinder sleeve 12 are not installed, and the blood drawing or the injection liquid drawing is completed by the sealing extrusion force between the rubber convex ring 8 and the inner cylinder wall of the sleeve 1;

(2) according to the specific medical care environment, when the drawing force of the needle cylinder is relatively large, the needle cylinder can be installed into the first cylinder sleeve 5 and the second cylinder sleeve 12, the force is applied to the push rod 2, the rubber plug 3 at the end part of the push rod 2 can move back and forth along the length direction of the sleeve 1, at the moment, the rubber convex ring 8 provided with the cavity 11 can be abutted against the outer cylinder wall of the sleeve 1, the inner sleeve wall of the first cylinder sleeve 5 and the inner sleeve wall of the second cylinder sleeve 12 in sequence, the rubber convex ring 8 can deform, especially when the rubber plug 3 is positioned on the inner sleeve wall of the second cylinder sleeve 12 and is extruded, the effective contact area between the rubber plug 3 and the inner sleeve wall of the second cylinder sleeve 12 is maximum, and the drawing force is relatively;

(3) after finishing using, take out second barrel casing 12 earlier, then deviate from the one end of syringe needle through pressing self-destruction needle 15, in rubber bulge loop 8, cavity 11 can be pricked in proper order to the syringe needle of self-destruction needle 15, the leakproofness between plug 3 and the sleeve 1 obtains destroying.

The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.

Claims

1. The utility model provides a medical injector, includes sleeve (1), installs push rod (2) in sleeve (1), installs plug (3) in push rod (2) tip, sleeve (1) tip is equipped with injection head (4), the tip that sleeve (1) deviates from injection head (4) is equipped with outside turn-ups (17) that extend, characterized by:

the sleeve is characterized by further comprising a contact piece (19), a threaded hole (18) is formed in the flanging (17), the contact piece (19) comprises a contact piece (191) and a threaded rod (192) connected to the contact piece (191), the threaded rod (192) is in threaded connection with the threaded hole (18), and the length direction of the contact piece (19) is perpendicular to the length direction of the sleeve (1);

an annular accommodating groove (20) is formed in the side wall of the flanging (17), the accommodating groove (20) is concentric with the threaded hole (18) and located on the outer side of the threaded hole (18), a rubber ring (21) is mounted on the abutting contact (191), and the rubber ring (21) is connected into the accommodating groove (20) in a sliding mode;

demountable installation has first barrel casing (5) in sleeve (1), first barrel casing (5) with be equipped with first sealing washer (6) between sleeve (1), tip that first barrel casing (5) are close to in injection head (4) is equipped with first chamfer (7), leave clearance (9) between plug (3) lateral wall and sleeve (1) inner tube wall, an organic whole is equipped with rubber bulge loop (8) on plug (3) lateral wall, rubber bulge loop (8) offset with the inner tube wall of sleeve (1).

2. A medical injector as claimed in claim 1, wherein: a gap (10) is reserved between the end part of the first sleeve (5) close to the injection head (4) and the end part of the sleeve (1) close to the injection head (4), and the rubber convex ring (8) can be positioned in the gap (10) and is abutted against the wall of the sleeve (1).

3. A medical injector as claimed in claim 2, wherein: a cavity (11) is arranged in the rubber convex ring (8).

4. A medical injector as claimed in claim 3, wherein: the first sleeve (5) is internally sleeved with a second sleeve (12), and a second chamfer (13) is arranged at the end part of the second sleeve (12) close to the injection head (4).

5. A medical injector according to claim 4, characterized in that: be equipped with in first barrel casing (5) and slide passageway (14), slide passageway (14) one end is run through in first barrel casing (5) and is close to the tip in injection head (4), slide passageway (14) other end runs through the tip that deviates from injection head (4) in first barrel casing (5), it is provided with self-destruction needle (15) to slide in slide passageway (14), the syringe needle orientation injection head (4) one side of self-destruction needle (15) just is used for pricking in plug (3).

6. A medical injector according to claim 5, characterized in that: the needle head of the self-destruction needle (15) is aligned to the rubber convex ring (8) where the cavity (11) is located and can be inserted into the cavity (11).

7. A medical injector according to claim 5, characterized in that: a second sealing ring (16) is arranged between the self-destruction needle (15) and the sliding channel (14).

8. A medical injector according to claim 5, characterized in that: one end of the self-destruction needle (15) departing from the needle head protrudes out of the channel opening of the sliding channel (14), and a protective groove (22) used for accommodating one end of the self-destruction needle (15) departing from the needle head is arranged on the second cylinder sleeve (12).