CN113559361A

CN113559361A - Insulin syringe capable of slowly pushing medicine

Info

Publication number: CN113559361A
Application number: CN202110993382.2A
Authority: CN
Inventors: 王欢欢; 李星辰
Original assignee: Tianjin University of Science and Technology
Current assignee: Tianjin University of Science and Technology
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2021-10-29

Abstract

The invention provides an insulin syringe capable of slowly pushing a medicine, which comprises a pushing cavity, a buffer cavity and a medicine cavity which are sequentially arranged along the axial direction of a holding tube; a propelling block is arranged in the propelling cavity and can move along the axial direction of the holding tube; damping media are filled in the buffer cavity, a first piston head is arranged in the buffer cavity and divides the buffer cavity into an upper layer and a lower layer, a control rod extends upwards from the top end of the first piston head, the top end of the control rod is arranged in the propelling cavity, and a spring is arranged between the top end of the control rod and the propelling block; the medicine cavity is internally provided with a second piston head which moves synchronously with the first piston head. When the medicine liquid pushing device is used, the spring is pressed downwards, so that the spring is stressed and compressed, the spring applies pressure to the control rod, the control rod moves towards the direction of the medicine cavity, the movement speed of the control rod is controlled by the damping medium and the first piston head, and the situation that the medicine liquid is pushed at an excessively high speed and discomfort is caused to a patient is prevented.

Description

Insulin syringe capable of slowly pushing medicine

Technical Field

The invention belongs to the field of medical supplies, and particularly relates to an insulin syringe capable of slowly pushing a medicine.

Background

Diabetes is a group of metabolic diseases characterized by hyperglycemia. Hyperglycemia is caused by insulin secretion defect or impaired biological effect, and most of diabetics adopt insulin injected at home to control self-blood sugar along with the improvement of treatment means;

however, during the insulin injection, since most patients are not trained to perform the injection, the conventional syringe is not suitable for controlling the advancing speed of the liquid medicine during the insulin injection.

Disclosure of Invention

In view of this, the present invention is directed to an insulin syringe capable of slowly pushing a drug, so as to reduce the difficulty of using the syringe and facilitate the patient to inject insulin by himself/herself.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

an insulin syringe capable of slowly pushing medicine comprises a holding tube, wherein a pushing cavity, a buffer cavity and a medicine cavity are sequentially arranged in the holding tube along the axial direction of the holding tube;

a propelling block is arranged in the propelling cavity and can move along the axial direction of the holding tube;

the damping medium is filled in the buffer cavity, a first piston head is arranged in the buffer cavity and divides the buffer cavity into an upper layer and a lower layer, the first piston head can move along the axial direction of the holding tube, a control rod extends upwards from the top end of the first piston head, the control rod penetrates through the buffer cavity and is arranged in the pushing cavity, a spring is arranged between the top end of the control rod and the pushing block, one end of the spring abuts against the pushing block, the other end of the spring abuts against the top end of the control rod, and a liquid passing hole is formed in the first piston head;

and a second piston head is arranged in the medicine cavity and moves synchronously with the first piston head.

Furthermore, the side wall of the holding tube is provided with a through hole, a pressure head is arranged in the through hole, the inner side of the pressure head is obliquely provided with a guide surface, the top end of the propelling block is provided with a contact surface corresponding to the guide surface, and when the pressure head moves into the holding tube, the propelling block moves towards the direction of the medicine cavity.

Furthermore, the bottom end of the propelling block extends downwards to form a guide post, the top end of the control rod extends upwards to form a guide pipe, the guide post is inserted into the guide pipe, and the spring is sleeved outside the guide pipe and the guide post.

Furthermore, a sliding hole is formed in the side wall of the holding tube, the length direction of the sliding hole is parallel to the axial direction of the holding tube, a sliding block extends outwards from the control rod, and the sliding block penetrates through the sliding hole and is arranged outside the holding tube.

Further, the length of the sliding hole is larger than the movement distance of the pushing block.

Furthermore, the first piston head extends downwards to form a linkage rod, and the linkage rod penetrates through the buffer cavity to enter the medicine cavity and is fixedly connected with the second piston head.

Furthermore, the side wall of the holding tube is provided with an air hole, the air hole is arranged at the top of the medicine cavity, and the second piston head is arranged below the air hole.

Furthermore, a connecting mouth used for being connected with the needle head is arranged at the end part of the medicine cavity.

Compared with the prior art, the insulin syringe capable of slowly pushing the medicine has the following advantages:

when the medicine liquid pushing device is used, the spring is pressed downwards, so that the spring is stressed and compressed, the spring applies pressure to the control rod, the control rod moves towards the direction of the medicine cavity, the movement speed of the control rod is controlled by the damping medium and the first piston head, and the situation that the medicine liquid is pushed at an excessively high speed and discomfort is caused to a patient is prevented.

The pressure head is arranged on the side of the holding tube, so that a patient can hold the injector with one hand and inject at the same time;

the first piston head and the second piston head are controlled to move in a sliding block mode so as to control the second piston head to move and draw liquid medicine.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of the syringe;

FIG. 2 is a schematic cross-sectional view of the internal structure of the syringe;

fig. 3 is a schematic view of the matching structure of the pressing head and the pushing block.

Description of reference numerals:

1-holding the tube; 11-a through hole; 12-a sliding hole; 13-air holes; 2-a propulsion chamber; 21-a propelling block; 211-contact surface; 23-pressure head; 231-a guide surface; 232-guide post; 24-a control lever; 241-a guide tube; 242-a slider; 25-a spring; 3-a buffer chamber; 31-linkage; 32-a first piston head; 321-liquid passing holes; 4-medicine cavity; 41-a second piston head; 42-connecting mouth.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The insulin syringe capable of slowly pushing the medicine comprises a holding tube 1, wherein a pushing cavity 2, a buffer cavity 3 and a medicine cavity 4 are sequentially arranged in the holding tube 1 along the axial direction of the holding tube 1, for the convenience of production, the holding tube 1 can be a complete pipe fitting, and the holding tube 1 is divided into the pushing cavity 2, the buffer cavity 3 and the medicine cavity 4 by corresponding partition plates in the middle of the pipe fitting; or the shells of the propelling cavity 2, the buffer cavity 3 and the medicine cavity 4 can be produced respectively, and then the three shells are combined to form the holding tube 1; the holding tube 1 can be a complete tube, and the propelling cavity 2, the buffering cavity 3 and the medicine cavity 4 are respectively independent cavities and are fixedly arranged at different positions in the holding tube 1.

Specifically, a pushing block 21 is arranged in the pushing cavity 2, the pushing block 21 can move along the axial direction of the holding tube 1, a through hole 11 is formed in the side wall of the position of the pushing cavity 2 of the holding tube 1, a pressure head 23 is arranged in the through hole 11, a guide surface 231 is obliquely formed on the inner side of the pressure head 23, a contact surface 211 corresponding to the guide surface 231 is arranged at the top end of the pushing block 21, when the pressure head 23 moves towards the holding tube 1, the guide surface 231 is in contact with the contact surface 211, and then the pushing block 21 is extruded to move towards the direction of the medicine cavity 4 along with the movement of the pressure head 23 towards the holding tube 1;

the buffering cavity 3 is internally provided with a first piston head 32, the first piston head 32 divides the buffering cavity 3 into an upper layer and a lower layer, damping media are filled in the upper layer and the lower layer, the first piston head 32 can move along the axial direction of the holding tube 1, a liquid passing hole 321 is formed in the peripheral side of the first piston head 32, the damping media can pass through the liquid passing hole 321 and flow from one side of the piston head to the other side, the liquid passing hole 321 is small, so that the damping media slowly flow from one side of the piston head to the other side of the piston head, a person skilled in the art knows that the damping media can be liquid such as silicone oil, castor oil and the like, the top end of the first piston head 32 extends upwards to form a control rod 24, the control rod 24 passes through the buffering cavity 3, a sliding seal is arranged between the top wall of the buffering cavity 3 and the side wall of the control rod 24 to prevent the damping media from flowing out, the control rod is arranged in the propelling cavity 2, and a spring 25 is arranged between the top end of the control rod 24 and the propelling block 21, one end of the spring 25 abuts against the pushing block 21, the other end abuts against the top end of the control rod 24, the bottom end of the pushing block 21 extends downwards to form the guide post 232, the top end of the control rod 24 extends upwards to form the guide tube 241, the guide post 232 is inserted into the guide tube 241, the spring 25 is sleeved outside the guide tube 241 and the guide post 232, when the pushing block 21 moves towards the direction of the medicine cavity 4 in work, the spring 25 is stressed to contract, and in the contraction process of the spring 25, pressure is continuously applied to the control rod 24, at the moment, the first piston head 32 moves towards the direction of the medicine cavity 4, but the movement speed of the first piston head 32 is slowed down due to slow flowing of a damping medium;

the second piston head 41 is arranged in the medicine cavity 4, the first piston head 32 extends out of the linkage rod 31 towards the medicine cavity 4, the end part of the linkage rod is fixedly connected with the second piston head 41, so that the second piston head 41 and the second piston head move synchronously, the linkage rod is connected with the bottom of the buffer cavity 3 in a sliding and sealing mode, damping media are prevented from flowing out of the buffer cavity 3, and when the first piston head 32 moves towards the medicine cavity 4, the second piston port moves downwards, and liquid medicine is pushed to be injected.

In order to control the movement of the two piston heads and facilitate the suction of liquid medicine into the medicine cavity 4, the holding tube 1 is provided with a sliding hole 12 on the side wall of the pushing cavity 2, the length direction of the sliding hole 12 is parallel to the axial direction of the holding tube 1, the control rod 24 extends outwards to form a sliding block 242, the sliding block 242 penetrates through the sliding hole 12 and is arranged outside the holding tube 1, an operator can control the movement of the first piston head 32 and the second piston head 41 by pushing the sliding block 242, and the length of the sliding hole 12 is greater than the movement distance of the pushing block 21.

The side wall of the holding tube 1 is provided with an air hole 13, the air hole 13 is arranged at the top of the medicine cavity 4, the second piston head 41 is arranged below the air hole 13, and when the second piston head 41 moves, air is filled above the second piston head 41 through the air hole 13, so that the air pressure above the second piston head 41 is balanced with the outside.

The end of the medicine cavity 4 is provided with a connecting mouth 42 used for connecting with a needle for connecting with the needle.

The inside of the pressure head outwards extends to form a flanging, so that the pressure head is prevented from outwards jumping out.

During the operation of the insulin syringe capable of slowly pushing the medicine, firstly, the needle is installed on the connecting nozzle 42, the pushing slide block 242 is arranged at the lowest position to drive the second piston head 41 to move and discharge the air in the medicine cavity 4, then, the needle is inserted into a medicine bottle (such as an ampoule bottle), the slide block 242 is pushed upwards to enable the second piston head 41 to move upwards so that the medicine liquid fills the medicine cavity 4, then, the medicine cavity 4 is lifted, the slide block 242 is pushed towards the medicine cavity 4, the air in the medicine cavity 4 is discharged by utilizing the second piston head 41, in order to ensure the pressing effect of the spring 25, the spring 25 is in a slight compression state at the moment, so that two ends of the spring 25 are tightly pressed against the end part of the control rod 24 and the end part of the pushing block 21, then, the needle is manually inserted into the part to be injected, the pressing head 23 is pressed so that the spring 25 contracts, and under the pressure action of the spring 25, the first piston head 32 and the second piston head 41 move, the liquid medicine is pushed into the body of the patient until the second piston head 41 is static, one injection is completed, and when the sliding block is pushed upwards, the control rod drives the spring and the pushing block to move upwards, so that the pushing block is reset.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An insulin syringe capable of slowly pushing medicine is characterized in that: comprises a holding tube (1), wherein a propelling cavity (2), a buffer cavity (3) and a medicine cavity (4) are sequentially arranged in the holding tube (1) along the axial direction;

a propelling block (21) is arranged in the propelling cavity (2), and the propelling block (21) can move along the axial direction of the holding tube (1);

the damping cavity (3) is filled with damping media, a first piston head (32) is arranged in the buffering cavity (3) and divides the buffering cavity (3) into an upper layer and a lower layer, the first piston head (32) can move along the axial direction of the holding tube (1), the top end of the first piston head (32) extends upwards to form a control rod (24), the control rod (24) penetrates through the buffering cavity (3) and is arranged in the propelling cavity (2), a spring (25) is arranged between the top end of the control rod (24) and the propelling block (21), one end of the spring (25) abuts against the propelling block (21) and the other end abuts against the top end of the control rod (24), and a liquid passing hole (321) is formed in the first piston head (32);

a second piston head (41) is arranged in the medicine cavity (4), and the second piston head (41) and the first piston head (32) move synchronously. .

2. An insulin syringe capable of slowly pushing a drug according to claim 1, wherein: hold and hold pipe (1) lateral wall and open and to have through-hole (11), a pressure head (23) are arranged in through-hole (11), the inboard slope of pressure head (23) is opened and is had guide surface (231), propelling block (21) top is equipped with the contact surface corresponding with guide surface (231), and when pressure head (23) when holding pipe (1) internal motion, propelling block (21) move to medicine chamber (4) direction. .

3. An insulin syringe capable of slowly pushing a drug according to claim 1, wherein: the bottom end of the pushing block (21) extends downwards to form a guide column (232), the top end of the control rod (24) extends upwards to form a guide pipe (241), the guide column (232) is inserted into the guide pipe (241), and the guide pipe (241) and the guide column (232) are sleeved with the spring (25).

4. An insulin syringe capable of slowly pushing a drug according to claim 1, wherein: the side wall of the holding tube (1) is provided with a sliding hole (12), the length direction of the sliding hole (12) is parallel to the axial direction of the holding tube (1), the control rod (24) extends outwards to form a sliding block (242), and the sliding block (242) penetrates through the sliding hole (12) and is arranged outside the holding tube (1).

5. An insulin syringe capable of slowly pushing a drug according to claim 4, wherein: the length of the sliding hole (12) is larger than the movement distance of the pushing block (21).

6. An insulin syringe capable of slowly pushing a drug according to claim 1, wherein: the first piston head (32) extends downwards to form a linkage rod (31), and the linkage rod (31) penetrates through the buffer cavity (3) to enter the medicine cavity (4) and is fixedly connected with the second piston head (41).

7. An insulin syringe capable of slowly pushing a drug according to claim 1, wherein: an air hole (13) is formed in the side wall of the holding tube (1), the air hole is formed in the top of the medicine cavity (4), and the second piston head (41) is arranged below the air hole (13).

8. An insulin syringe capable of slowly pushing a drug according to claim 1, wherein: the end part of the medicine cavity (4) is provided with a connecting mouth (42) used for being connected with a needle head.