CN215231154U - Self-destruction syringe - Google Patents

Abstract

A self-destruction syringe comprises a cylinder body, a sealing plug, a core rod and a stop type self-destruction part, wherein the sealing plug is movably arranged in the cylinder body, and the core rod and the sealing plug are fixedly connected in the axial direction of the cylinder body; the stop type self-destruction part is used for fixedly connecting the core rod and the cylinder in the axial direction of the cylinder, or is used for fixedly connecting the sealing plug and the cylinder in the axial direction of the cylinder. The characteristics of the injector before use and the characteristics of the injector after use can be obviously distinguished, and the purpose of self-destruction of the injector after one-time use is further realized.

Description

Self-destruction syringe

Technical Field

The utility model relates to a disposable injection instrument technical field, concretely relates to self-destruction formula syringe.

Background

The quantitative injection tool can reduce the risk of over-injection, and the requirement on operators is low. Patent document CN112169079A describes a medical injection device with a dosing function, which comprises an injection needle, a dosing block and an inner clamping wheel, wherein a pressurizing skin plug is arranged at the right side inside the injection needle, a push rod is arranged on the left side of the pressurizing leather plug, a pressurizing plate is arranged on the right side of the push rod, a quantifying block is arranged on the left side of the pressurizing plate, an auxiliary extrusion plate is arranged on the left side of the quantifying block, the right side of the auxiliary extrusion plate is provided with an outer latch, the left side of the injection needle is provided with a needle head mounting tube, the lower side of the inner part of the quantitative block is provided with an adjusting port, an adjusting column is arranged in the adjusting opening, an auxiliary adjusting ball is fixed at the rear side of the inner part of the right end of the adjusting column, and the rear side of the auxiliary adjusting ball is provided with a bearing, the outer side of the bearing is provided with an inner clamping wheel, the left side of the inner clamping wheel is provided with a fixed rod, the top of the adjusting column is provided with a connecting hinge, and a clamping block is arranged below the connecting hinge. In the technical scheme, the quantitative injection operation is realized by limiting the relative positions of the push rod and the injection needle through the quantitative block. However, it is also a problem to be solved how to avoid the syringe from being reused after use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a self-destruction syringe to solve the problem that the distinguishing characteristics are not obvious before and after the syringe is used.

The technical scheme of the utility model is that:

a self-destruction syringe comprises a cylinder body, a sealing plug, a core rod and a stop type self-destruction part, wherein the sealing plug is movably arranged in the cylinder body, and the core rod and the sealing plug are fixedly connected in the axial direction of the cylinder body; the stop type self-destruction part is used for fixedly connecting the core rod and the cylinder in the axial direction of the cylinder, or is used for fixedly connecting the sealing plug and the cylinder in the axial direction of the cylinder.

Preferably, the stop type self-destruction part is a sealing plug degenerative damage part arranged on the side surface of the inner cavity of the cylinder body, and the sealing plug degenerative damage part is used for fixedly connecting the sealing plug and the cylinder body in a non-detachable mode. The degenerative damage part of the sealing plug is preferably arranged on the side surface of the inner cavity of the cylinder body and is adjacent to the head end of the inner cavity of the cylinder body. And after the core rod drives the sealing plug to withdraw from the sealing plug degenerative damage part, the sealing plug degenerative damage part damages the sealing effect of the sealing plug.

Preferably, the core rod is provided with a limiting convex shoulder, the stopping type self-destruction part comprises a clamping part, the clamping part is provided with an elastic stopping stop card matched with the limiting convex shoulder, a clamping part stopping embedded groove is formed in the barrel, the clamping part is arranged in the clamping part stopping embedded groove, one point on the inner wall surface of the end head of the barrel is taken as a first reference point, one point of the sealing plug used for being attached to the first reference point is taken as a second reference point, and the distance between the elastic stopping stop card and the first reference point is larger than or equal to the distance between the limiting convex shoulder and the second reference point.

Preferably, the needle comprises a needle point and the accommodating cavity occupying block is arranged in a connecting pipeline of the needle point and the cylinder body, so that the volume of a cavity between the needle point, the cylinder body and the sealing plug when the sealing plug is pushed to the front end point of the cylinder body is reduced.

Further preferably, the barrel comprises a barrel insertion tube, the accommodation cavity occupying block is a needle seat insertion tube which is used for being inserted into the barrel insertion tube, the needle seat insertion tube is used for communicating the barrel with the needle point through a pipeline, and the needle seat insertion tube is a part of the needle head.

Preferably, still include syringe needle and needle point and prevent stinging the device, the barrel has the barrel intubate, the syringe needle is including being used for the needle file with barrel intubate plug-in connection, the needle file is equipped with the elasticity portion, the needle point prevents that the thorn device has the needle file connecting piece, the needle file connecting piece be used for with the elasticity portion joint is connected.

Further preferably, the needle seat connecting piece is used for enabling the distance between the elastic parts to be less than the outer diameter of the barrel cannula.

Further preferably, the needle file with the barrel intubate is connected at joint position joint, the elastic component sets up joint position with between the seat bottom of needle file, the elastic component with barrel intubate gap junction.

Further preferably, the needle file with the barrel intubate is connected at joint position joint, the elastic component sets up the joint position with between the seat bottom of needle file, the outer wall of barrel intubate is equipped with the anticreep arch, the card of needle file connecting piece is apart from being less than the minimum interval of the joint position department of barrel intubate.

The utility model has the advantages that:

1. after the self-destruction syringe is used, the stop type self-destruction part is clamped and connected with the sealing plug and the cylinder body, or the core rod and the cylinder body, so that the characteristics of the syringe before use and the characteristics of the syringe after use can be obviously distinguished, and the purpose of self-destruction of the syringe after one-time use is further realized.

2. When the stop type self-destruction part is the sealing plug degeneration damage part arranged on the side surface of the inner cavity of the cylinder body, the sealing plug degeneration damage part destroys the sealing effect between the sealing plug and the cylinder body when the core rod drives the sealing plug to regress, and the purpose of self-destruction of the syringe after one-time use can be realized.

3. The clamping and stopping piece is used for clamping and connecting the barrel and the sealing plug in the axial direction of the barrel, when the clamping and stopping piece works, the resistance for pushing the sealing plug to the head end of the barrel can be increased, and the resistance for pulling the sealing plug to the tail end of the barrel can be increased, so that the characteristics before and after the use of the syringe can be obviously distinguished, and the purpose of self-destruction of the self-destruction syringe after one-time use is convenient to realize.

3. The cylinder body is provided with an injection cavity volume scale which is a convex part or a concave part, and the injection cavity volume scale corresponds to the injection cavity volume, so that the purpose of quantitative injection can be realized.

4. The holding cavity occupying block can reduce the residual liquid medicine of the self-destruction syringe, thereby improving the utilization rate of the liquid medicine and reducing the waste.

5. When the needle stand cannula forms the containing cavity occupying block, the length of the needle head can be shortened, the occupied space of the self-destruction injector is reduced, and the storage and the transportation are convenient.

6. The needle point puncture-proof device can isolate the needle point from other objects when needed (the characteristics of the syringe before and after use can be obviously distinguished), the elastic part is deformed by the clamping elastic part of the needle seat connecting piece, the axial connection strength of the needle head and the barrel can be enhanced, the needle head can be prevented from being sleeved on the cannula of the barrel, and the purpose of self-destruction of the self-destruction syringe after one-time use is facilitated.

Drawings

FIG. 1 is a cross-sectional view of a self-destructive injector, wherein the core pin is not sectioned.

Fig. 2 is an enlarged view of a portion a of fig. 1.

Fig. 3 is an enlarged view of a portion B of fig. 1.

FIG. 4 is a cross-sectional view showing a state of use of the cylinder and the core bar, in which the core bar is not cut.

Fig. 5 is a cross-sectional view of a needle.

Fig. 6 is a cross-sectional view of a needle and needle tip puncture prevention device in use.

Reference numerals indicate, 11-barrel, 111-barrel cannula, 112-anti-slip protrusion, 113-quantitative necking, 114-retainer stop caulking groove, 116-retainer guide transition surface, 12-core bar, 121-stop shoulder, 13-sealing plug, 14-retainer, 141-elastic anti-slip clip, 150-injectate chamber, 151-connecting tube, 2-needle, 20-needle seat, 202-anti-slip neck, 203-needle seat cannula, 204-elastic part, 21-needle point, 3-needle point protective sleeve, 4-needle point anti-stab device, 41-needle seat connecting piece, 42-first bendable connecting piece, 43-second bendable connecting piece, 44-safety shield.

Detailed Description

The present invention is described below in terms of embodiments with reference to the accompanying drawings to assist those skilled in the art in understanding and realizing the invention. Unless otherwise indicated, the following embodiments and technical terms therein should not be understood to depart from the background of the technical knowledge in the technical field.

Example 1: a self-destruction syringe, as shown in figures 1-6, comprises a barrel 11, a sealing plug 13, a core rod 12 and a stop type self-destruction part.

The sealing plug 13 is movably arranged in the cylinder body 11. Typically, the sealing plug 13 moves in the axial direction of the cylinder, but may also rotate in the circumferential direction of the cylinder. The core rod 12 and the sealing plug 13 are fixedly connected in the axial direction of the cylinder 11, so that the sealing plug 13 can be driven by the core rod 12 to move in the axial direction of the cylinder 11.

In this embodiment, the self-destruction stop part is used to fixedly connect the core rod 12 and the cylinder 11 in the axial direction of the cylinder 11, and in other embodiments, the self-destruction stop part may also be used to fixedly connect the sealing plug 13 and the cylinder 11 in the axial direction of the cylinder 11.

In this embodiment, the self-destruction syringe is self-destroyed in this way. The limiting shoulder 121 is arranged on the circumferential surface of the core rod 12 and is fixedly connected with the core rod 12. The stop type self-destruction part comprises a clamping stop piece 14, and the clamping stop piece 14 is arranged in the barrel body 11 and is fixedly connected with the barrel body 11. Specifically, a clamping part stopping embedded groove 114 is arranged in the cylinder body 11, the clamping part 14 is arranged in the clamping part stopping embedded groove 114, the clamping part 14 is a ring-shaped part, an elastic stopping card 141 is integrally formed at an inner hole of the clamping part 14, a point on the inner wall surface of the end head of the cylinder body 11 is taken as a first reference point, a point of the sealing plug 13 for jointing the first reference point is taken as a second reference point, and the distance between the elastic stopping card 141 and the first reference point is larger than or equal to the distance between the limiting convex shoulder 121 and the second reference point. When the auto-disable syringe is not in use, the limiting shoulder 121 is arranged outside the elastic retaining clip 141, and when the core rod 12 is operated, the limiting shoulder 121 is driven to penetrate through the inner hole of the clamping part 14 and cross the elastic retaining clip 141, so that the elastic retaining clip 141 can prevent the core rod 12 from withdrawing, and the purpose of auto-disable after one-time use of the auto-disable syringe is realized.

In this embodiment, a quantitative neck 113 for limiting the moving range of the sealing plug 13 is further provided in the cylinder 11 between the head end of the cylinder 11 and the retainer stopper receiving groove 114. The quantitative necking 113 and the inner wall of the head end of the cylinder 11 jointly limit the moving interval of the sealing closure 13 in the axial direction of the cylinder 11, and the purpose of quantitative injection can be realized by setting the volume of the injection liquid cavity in the moving interval of the sealing closure 13.

Referring to fig. 4, grip stop insert 114 may be configured such that: a first stopping part for stopping the advance of the clamping part 14 is arranged at one side of the clamping part stopping embedded groove 114, which is adjacent to the head end of the barrel body 11, a second stopping part for stopping the retreat of the clamping part 14 is arranged at one side of the clamping part stopping embedded groove 114, which is adjacent to the tail end of the barrel body, and a clamping part guiding transition surface 116 is arranged on the inner wall between the tail end of the barrel body 11 and the clamping part stopping embedded groove 114.

Example 2: a self-destruction syringe comprises a barrel, a sealing plug, a core rod and a stop type self-destruction part, wherein the sealing plug is movably arranged in the barrel, and the core rod is fixedly connected with the sealing plug in the axial direction of the barrel. In this embodiment, the stop type self-destruction part is used for fixedly connecting the sealing plug and the cylinder in the axial direction of the cylinder.

Specifically, the stop type self-destruction part is a sealing plug degenerative damage part arranged on the side face of the inner cavity of the barrel body, and the sealing plug degenerative damage part is used for fixedly connecting the sealing plug and the barrel body in a non-detachable mode. The sealing plug is typically an elastomer. The triangular pyramid can be selected to the damaged portion that the sealing plug regresses, and the awl point of triangular pyramid is towards the tail end of barrel, and the awl end of triangular pyramid is on a parallel with the front end wall of barrel inner chamber, and like this, when the sealing plug was located through locking formula self-destruction portion, the sealing plug was extruded by the triangular pyramid, and after the sealing plug crossed locking formula self-destruction portion, the sealing plug recovered. However, when the sealing plug retreats, the cone bottom of the triangular pyramid can obstruct the retreating of the sealing plug, and the convex cone tip of the triangular pyramid can scratch the peripheral surface of the sealing plug due to the absence of the transition surface, so that the sealing effect of the sealing plug is damaged. Typically, the plug recession is preferably located on the side of the barrel cavity adjacent to the barrel cavity head.

Example 3: a self-destroying syringe, see fig. 1-6, includes a barrel 11, a sealing plug 13, a stem 12 and a catch 14. In this embodiment, the barrel 11 includes a barrel cannula 111. This embodiment is added with the following features as compared with embodiment 1.

The self-destruction syringe further comprises a needle 2 and a cavity occupying block, wherein the needle 2 comprises a needle seat 20 and a needle point 21, and the cavity occupying block is arranged in a connecting pipeline 151 of the needle point 21 and the barrel body 11 so as to reduce the volume of a cavity among the needle point 21, the barrel body 11 and the sealing plug 13 when the sealing plug 13 is pushed to the front end point of the barrel body 11.

In this embodiment, the holding cavity occupying block is a hub cannula 203 for being inserted into the barrel cannula 111, and the hub cannula 203 is used for communicating the barrel 11 and the needle tip 21 through a pipeline. Typically, the hub cannula 203 is integrally formed with the hub 20 and forms a part of the needle 2.

The needle base cannula 203 not only has the function of a containing cavity occupying block, but also can increase the connecting surface of the needle base 20 and the needle point 21 and shorten the length of the needle.

Example 4: a self-destruction syringe, as shown in Figs. 1-6, comprises a barrel 11, a sealing plug 13, a core rod 12 and a clamping stop 14, wherein in the embodiment, the barrel 11 comprises a barrel cannula 111, and a needle 2 comprises a needle point 21 and a needle seat 20 for plugging connection with the barrel cannula 111. This embodiment is added with the following features as compared with embodiment 1.

The self-destruction syringe further comprises a needle 2 and a needle point puncture-proof device 4, the needle base 20 is provided with an elastic part 204, the needle point puncture-proof device 4 comprises a needle base connecting piece 41, a connecting component and a safety sheath 43, and the needle base connecting piece 41 is used for being connected with the elastic part 204 in a clamping mode. In the initial position, the safety shield 44 is spaced from the needle tip 21, and in the shielded position, the needle tip is disposed within the safety shield, and the needle tip guard prevents the needle tip from penetrating into an object or animal or plant due to the obstruction of the safety shield. Typically, in the shielding position, the needle tip 21 is snap-fit connected to the safety shield 44 such that, because the needle tip is a rigid body, resistance can be applied to the needle tip when the safety shield 44 is rotated to separate the needle tip 21 from the safety shield 44. When the resistance is strong, the needle tip 21 will be bent.

The connecting assembly comprises a first bendable connecting piece 42 and a second bendable connecting piece 43, two ends of the first bendable connecting piece 42 are respectively fixedly connected with the needle base connecting piece 41 and the safety sheath 44, two ends of the second bendable connecting piece 43 are respectively fixedly connected with the needle base connecting piece 41 and the safety sheath 44, the rotation plane of the safety sheath 44 relative to the needle base 20 connecting piece is taken as a reference plane, projections of the first bendable connecting piece 42 and the second bendable connecting piece 43 on the reference plane are polygons, and the number of the sides of the polygons is more than or equal to 4. The polygon (except the triangle) has instability, and the connecting component can form at least two forms by virtue of the instability of the polygon, wherein one form is used for enabling the safety sheath to be arranged at an initial position, the needle point is separated from the safety sheath at the initial position, the other form is used for enabling the safety sheath to be arranged at a protection form, and the needle point is arranged in the safety sheath at the initial position, so that the effect of preventing the needle prick is realized.

In this embodiment, the first bendable connector 42 includes a 1A connection portion and a 1B connection portion, and the second bendable connector 43 includes a 2A connection portion and a 2B connection portion, as shown in FIG. 4, and the polygon is a convex quadrangle when the safety sheath 44 is in the initial position, as shown in FIG. 5, and the polygon is a concave quadrangle when the safety sheath 44 is in the protection position. When the safety sheath 44 is rotated, the second bendable connecting element 43 is largely deformed during the process of switching from the convex quadrangle to the concave quadrangle, so as to form another resistance, and also improve the difficulty of separating the needle point 21 from the safety sheath 44.

In order to make the hub 20 fit on the barrel insertion tube 111, the inner diameter of the hub 20 is equal to the outer diameter of the barrel insertion tube 111. In this embodiment, the hub connector 41 is preferably such that the spacing of the resilient portions 204 is less than the outer diameter of the barrel cannula 111. Thus, after the hub 20 is fitted over the barrel insertion tube 111, the hub connector 41 is engaged with the elastic portion, so that the elastic portion 204 can be pressed against the barrel insertion tube 111 by the hub connector 41. If the hub 201 is sleeved in front of the barrel insertion tube 111, so that the hub connection member 41 is connected with the elastic portion in a snap-fit manner, the distance between the elastic portions 204 is smaller than the outer diameter of the barrel insertion tube 111, that is, the hub 20 cannot be sleeved on the barrel insertion tube 111 before the hub connection member 41 is removed.

In order to improve the axial connection strength between the hub 20 and the barrel insertion tube 111, an anti-separation clamping groove 202 may be formed on the inner wall of the hub 20, and an anti-separation protrusion 112 may be formed on the barrel insertion tube 111. The anti-slip protrusion 112 may be annular or block-shaped. The anti-falling clamping groove 202 is matched with the anti-falling protrusion 112 to realize the clamping connection of the needle holder 20 and the barrel insertion tube 111, and the clamping positions of the needle holder 20 and the barrel insertion tube 111 are formed by the positions of the anti-falling clamping groove 202 and the anti-falling protrusion 112. Elastic part 204 is arranged between anti-slip clamping groove 202 and the bottom end of the seat of needle seat 20, and elastic part 204 is in clearance connection with barrel cannula 111. Thus, when the elastic part 204 is clamped on the barrel insertion tube 111 by the needle holder connecting piece 41, a deformation space exists at the elastic part 204, and the anti-falling bulge 112 can be prevented from passing through after the elastic part 204 is deformed, so that the axial connection strength of the needle holder 20 and the barrel insertion tube 111 can be improved. When the pitch of the hub connector 41 is smaller than the minimum pitch of the anti-slip projections of the barrel cannula 111, the needle 2 cannot be removed from the barrel 11 without removing the needle-tip anti-prick device 4.

In other embodiments, retaining groove 202 may be provided on the outer wall of barrel cannula 111 and retaining protrusion 112 may be provided on the inner wall of hub 20.

The present invention has been described in detail with reference to the accompanying drawings and examples. It should be understood that in practice the description of all possible embodiments is not exhaustive and that the inventive concepts are presented herein by way of illustration as much as possible. Without departing from the inventive concept of the present invention and without paying creative labor, technical personnel in the technical field can make or delete combinations, specific parameters to perform experimental changes to the technical features in the above embodiments, or use the prior art in the technical field to perform the specific embodiments of conventional replacement and formation by the disclosed technical means, which all belong to the content hidden in the present invention.

Claims (9)

1. A self-destruction syringe comprises a cylinder body, a sealing plug and a core rod, wherein the sealing plug is movably arranged in the cylinder body, and the core rod is fixedly connected with the sealing plug in the axial direction of the cylinder body; the self-destruction type sealing plug is characterized by further comprising a stopping type self-destruction part, wherein the stopping type self-destruction part is used for fixedly connecting the core rod and the barrel in the axial direction of the barrel, or is used for fixedly connecting the sealing plug and the barrel in the axial direction of the barrel.

2. The self-destructing syringe as recited in claim 1, wherein the stop-type self-destructing part is a sealing plug degenerative damage part disposed on the side of the barrel inner cavity, and the sealing plug degenerative damage part is used for non-detachably fixedly connecting the sealing plug and the barrel.

3. The self-destruction syringe as claimed in claim 1, wherein the core rod is provided with a limiting shoulder, the stopping self-destruction part comprises a clamping part, the clamping part is provided with an elastic stopping block card matched with the limiting shoulder, the barrel is provided with a clamping part stopping caulking groove, the clamping part is arranged in the clamping part stopping caulking groove, one point on the inner wall surface of the head end of the barrel is taken as a first reference point, one point of the sealing plug for jointing the first reference point is taken as a second reference point, and the distance between the elastic stopping block card and the first reference point is greater than or equal to the distance between the limiting shoulder and the second reference point.

4. The self-destructing syringe according to claim 1 further comprising a needle tip and a cavity occupying block for placement in a connecting conduit between the needle tip and the barrel to reduce the volume of the cavity between the needle tip, the barrel and the sealing plug when the sealing plug is pushed to the barrel front end point.

5. The self-destructing syringe of claim 4 wherein the barrel includes a barrel cannula, the receptacle expression block being a hub cannula for insertion into the barrel cannula, the hub cannula for tubing communication between the barrel and the needle tip, the hub cannula being part of the needle.

6. The self-destructive syringe according to claim 1, further comprising a needle and a needle tip puncture prevention device, wherein said barrel has a barrel insertion tube, said needle comprises a needle holder for plug-in connection with said barrel insertion tube, said needle holder is provided with an elastic portion, said needle tip puncture prevention device has a needle holder connector for snap-in connection with said elastic portion.

7. A self-destructing syringe as claimed in claim 6, wherein said hub connector is adapted to provide spacing of said resilient portions < said barrel cannula outer diameter.

8. The self-destructive syringe according to claim 6, wherein said hub is snap-fit connected to said barrel cannula at a snap-fit location, said resilient portion is disposed between said snap-fit location and a base end of said hub, said resilient portion being in clearance connection with said barrel cannula.

9. The self-destruction syringe of claim 6, wherein the needle holder is connected with the barrel insertion tube in a clamping manner at a clamping position, the elastic part is arranged between the clamping position and the bottom end of the needle holder, the outer wall of the barrel insertion tube is provided with an anti-dropping bulge, and the clamping distance of the needle holder connecting piece is smaller than the minimum distance at the clamping position of the barrel insertion tube.

Images