CN214970377U

CN214970377U - Syringe capable of injecting liquid in micro-control mode

Info

Publication number: CN214970377U
Application number: CN202120847781.3U
Authority: CN
Inventors: 陈强
Original assignee: Shanghai Yaojia Medical Technology Co ltd
Current assignee: Shanghai Yaojia Medical Technology Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-12-03
Anticipated expiration: 2031-04-23

Abstract

The utility model provides a syringe capable of injecting liquid in a micro-control mode, which belongs to the field of syringes and comprises a needle cylinder, a piston moving in the needle cylinder to absorb or extrude liquid and a piston rod connected with the piston and used for driving the piston to move in the needle cylinder, wherein two ends of the needle cylinder are respectively a handheld end and a liquid inlet and outlet end, one end of the piston rod extends into the needle cylinder from the handheld end and is connected with the piston, and a handheld part is arranged on the outer wall of a port of the handheld end; the piston rod is rotationally connected with the piston; the needle cylinder is provided with a conversion structure for controlling the piston rod to move linearly or rotationally. This syringe satisfies traditional straight push pull liquid or annotates liquid, and the while can convert the threaded connection mode into, combines the scale on the cylinder, can realize the micro-control of liquid measure effectively to satisfy special notes liquid environment and use.

Description

Syringe capable of injecting liquid in micro-control mode

Technical Field

The utility model belongs to the technical field of the syringe, especially, relate to a syringe of liquid is annotated in controllable.

Background

The syringe is a common medical appliance, and the appearance of the syringe is an epoch-making revolution in the field of medical appliances. The injector consists of a syringe with a small hole at the front end and a matched piston core rod, and is used for injecting a small amount of liquid or extracting the liquid or the liquid from the inaccessible area by other methods, wherein the liquid or gas is sucked from the small hole at the front end of the syringe when the core rod is pulled out, and the liquid or gas is extruded when the core rod is pushed in.

The traditional syringe generally draws the piston rod linearly to drive the piston to do linear motion in the syringe, thereby achieving the purpose of injection. But the manual drawing force is difficult to control, and the liquid amount is difficult to control accurately; in some special injections, the liquid amount control is particularly important, and the traditional injector is difficult to meet the requirements.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a syringe of liquid is annotated in controllable aiming at solving the problem that proposes in the background art.

The embodiment of the utility model provides a realize like this, a syringe of liquid is annotated in controllable, this syringe includes the cylinder, move in the cylinder and absorb or extrude the piston of liquid and with the piston links to each other, is used for driving the piston is in the piston rod that the cylinder removed, the both ends of cylinder are handheld end and liquid business turn over end respectively, one end of piston rod by handheld end stretch into in the cylinder with the piston links to each other, have handheld portion on the port outer wall of handheld end; the piston rod is rotationally connected with the piston;

the needle cylinder is provided with a conversion structure for controlling the piston rod to move linearly or rotationally.

Preferably, the outer wall of the piston rod is provided with threads;

the transition structure comprises a positioning tube at the handheld end;

the positioning tube comprises a fixed tube positioned on the handheld end and an elastic part positioned at one end of the positioning tube far away from the needle cylinder, and the inner side of one end of the elastic part far away from the positioning tube is provided with a tooth part capable of being meshed with the thread.

The conversion structure further comprises a lock sleeve which moves on the positioning rod to tighten or release the elastic part.

Preferably, the caliber of one end of the lock sleeve close to the needle cylinder is at least smaller than the caliber of one end of the lock sleeve far away from the needle cylinder.

Preferably, the outer wall of the positioning tube is symmetrically provided with moving grooves, and a protruding part clamped in the moving grooves is arranged in one end, close to the needle cylinder, of the lock sleeve.

Preferably, the moving groove extends spirally from one end of the positioning tube close to the needle cylinder to one end of the positioning tube far away from the needle cylinder.

Preferably, the outer wall of the syringe barrel is provided with a scale.

Preferably, the end of the piston rod remote from the piston is provided with a knob.

This syringe satisfies traditional straight push pull liquid or annotates liquid, and the while can convert the threaded connection mode into, combines the scale on the cylinder, can realize the micro-control of liquid measure effectively to satisfy special notes liquid environment and use.

Drawings

FIG. 1 is a schematic diagram of a syringe with micro-controlled injection;

FIG. 2 is a schematic view of the mounting structure of a positioning tube in a syringe for micro-controlled injection;

fig. 3 is a schematic cross-sectional view of a syringe for micro-controlled injection.

In the figure:

1. a needle cylinder;

2. a piston;

3. a piston rod;

4. a hand-held portion;

5. a positioning tube; 51. a fixed tube; 52. an elastic portion; 53. a moving groove; 54. a tooth portion;

6. a lock sleeve; 61. a protrusion;

7. calibration;

8. a knob.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The utility model provides a syringe of liquid is annotated in controllable declining, as shown in figure 1, figure 2 and figure 3, this syringe include cylinder 1 the cylinder 1 removes the piston 2 that absorbs or extrude liquid and with piston 2 links to each other, is used for driving piston 2 is in piston rod 3 that the cylinder 1 removed, the both ends of cylinder 1 are handheld end and liquid business turn over end respectively, the one end of piston rod 3 by handheld end stretches into in the cylinder 1 with piston 2 links to each other, handheld portion 4 has on the port outer wall of handheld end.

In contrast to the prior art, the piston rod 3 is connected to the piston 2 in a rotatable manner; the needle cylinder 1 is provided with a conversion structure for controlling the piston rod 3 to move linearly or rotationally. The connection mode of the piston rod 3 and the needle cylinder 1 is controlled by the conversion structure, when the piston rod 3 moves vertically, the piston rod 3 is directly pushed and pulled to drive the piston 2 to move to suck or extrude liquid, and the liquid amount control difficulty is high at the moment; when the conversion structure controls the piston rod 3 to rotate, the direct pushing type is converted into the rotating motion, so that the micro-control is facilitated.

Specifically, the outer wall of the piston rod 3 is provided with threads;

the conversion structure comprises a positioning tube 5 at the handheld end;

the positioning tube 5 comprises a fixed tube 51 positioned on the handheld end and an elastic part 52 positioned at one end of the positioning tube 51 far away from the needle cylinder 1, and the inner side of one end of the elastic part 52 far away from the positioning tube 51 is provided with a tooth part 54 capable of being engaged with the thread.

The switching arrangement further comprises a lock sleeve 6 which is movable on the positioning rod 5 to tighten or release the elastic portion 52.

It can be further understood that, when liquid is sucked or squeezed and rapid liquid taking or injection is required, the lock sleeve 6 is moved to enable the lock sleeve 6 to be close to the needle cylinder 1, the elastic part 52 is released, the tooth part 54 is disengaged from the thread of the piston rod 3, and the piston rod 3 is further enabled to move linearly on the needle cylinder 1 to drive the piston 2 to move in the needle cylinder 1 to suck or squeeze liquid; when micro-control is needed, the lock sleeve 6 is moved, so that the lock sleeve 6 moves to the elastic part 52, the tooth part 54 on the elastic part 52 is meshed in the thread of the piston rod 3, and the piston rod 3 rotates on the needle cylinder 1 by rotating the piston rod 3 under the matching of the tooth part 54 and the thread, so that the piston 2 is driven to move to suck or extrude liquid, and the micro-control is realized.

Further, the resilient portion 52 can be locked for the locking sleeve 6 such that the toothed portion 54 engages with the thread of the piston rod 3; the caliber of one end of the lock sleeve 6 close to the needle cylinder 1 is at least smaller than the caliber of one end of the lock sleeve 6 far away from the needle cylinder 1.

Further, in order to ensure the stability of the lock sleeve 6, the lock sleeve 6 is not affected by the elastic force of the elastic part 54 and moves under the condition of locking the elastic part 54; the outer wall of the positioning tube 51 is symmetrically provided with moving grooves 53, and one end of the lock sleeve 6 close to the needle cylinder 1 is internally provided with a protruding part 61 clamped in the moving grooves 53. Wherein, the moving groove 53 extends spirally from one end of the positioning tube 51 close to the syringe 1 to one end of the positioning tube 51 far from the syringe 1.

In one embodiment, the outer wall of the cylinder 1 is provided with a scale 7 in order to further achieve a micro-control of the liquid amount.

In this embodiment, when the liquid is taken or injected, the change of the liquid amount in the cylinder 1 can be observed through the cylinder 1, thereby facilitating the micro-control of the liquid amount.

In one embodiment, for ease of operation, the end of the piston rod 3 remote from the piston 2 has a knob 8.

In this embodiment, when getting liquid and annotating the liquid, can hand knob 8 and carry out the pull action, accessible knob 8 rotary piston rod 3 simultaneously promotes piston 2 and removes and get liquid or annotate the liquid, gives people through knob 8 and holds a portion of getting to make the operation of syringe more convenient.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A syringe capable of injecting liquid in a micro-control mode comprises a needle cylinder (1), a piston (2) moving in the needle cylinder (1) to suck or extrude liquid, and a piston rod (3) connected with the piston (2) and used for driving the piston (2) to move in the needle cylinder (1), wherein two ends of the needle cylinder (1) are respectively a handheld end and a liquid inlet and outlet end, one end of the piston rod (3) extends into the needle cylinder (1) from the handheld end and is connected with the piston (2), and a handheld part (4) is arranged on the outer wall of a port of the handheld end; the piston is characterized in that the piston rod (3) is rotationally connected with the piston (2);

the needle cylinder (1) is provided with a conversion structure for controlling the piston rod (3) to move linearly or rotationally.

2. The syringe with micro-controlled injection according to claim 1, characterized in that the outer wall of the piston rod (3) is provided with a thread;

the conversion structure comprises a positioning tube (5) at the hand-held end;

the positioning tube (5) comprises a fixed tube (51) positioned on the handheld end and an elastic part (52) positioned at one end of the positioning tube (5) far away from the needle cylinder (1), and the inner side of one end of the elastic part (52) far away from the positioning tube (5) is provided with a tooth part (54) capable of being engaged with the thread;

the switching arrangement further comprises a lock sleeve (6) which is movable on the positioning tube (5) to tighten or release the elastic portion (52).

3. The syringe with controllable injection according to claim 2, wherein the diameter of the end of the lock sleeve (6) close to the syringe (1) is at least smaller than the diameter of the end of the lock sleeve (6) far from the syringe (1).

4. The syringe capable of injecting liquid in a micro-controlled manner as claimed in claim 2, wherein the outer wall of the positioning tube (5) is symmetrically provided with moving grooves (53), and a protrusion (61) which is clamped in the moving grooves (53) is arranged inside one end of the lock sleeve (6) close to the syringe (1).

5. The syringe with controllable injection according to claim 4, characterized in that the moving groove (53) extends spirally from the end of the positioning tube (51) close to the syringe (1) to the end of the positioning tube (5) far from the syringe (1).

6. The syringe with controllable injection according to claim 1, characterized in that the outer wall of the syringe (1) has a scale (7).

7. The syringe with controllable injection according to claim 1, characterized in that the end of the piston rod (3) remote from the piston (2) is provided with a knob (8).