Automatic infusion device

Abstract

The present invention belongs to the technical field of medical devices, and specifically discloses an automatic infusion device, including a tube body, a liquid storage cavity arranged in the tube body, a liquid outlet exposed at one end of the tube body and connected to the liquid storage cavity, and a piston drive assembly driving the liquid in the liquid storage cavity to feed outward, wherein the piston drive assembly is threadedly connected to the tube body and reciprocates along the length direction of the tube body. The automatic infusion device designed with this structure, through the threaded connection between the piston drive assembly and the tube body, enables the piston drive assembly to move along the length direction of the tube body, and then pushes the liquid medicine in the liquid storage cavity out of the liquid outlet, thereby completing the injection of the liquid medicine. The present invention has a compact structure and a small size, and can automatically complete the injection of the liquid medicine through the movement of the piston drive assembly, which is convenient and practical.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an automatic infusion device. Background Art

[0002] In the prior art, the driving assembly of the infusion device for pushing the medicine liquid to be fed is mostly arranged separately from the medicine tube, so that the assembled infusion device is large in size, not compact in structure, and occupies a large space. Summary of the invention

[0003] The object of the present invention is to provide an automatic infusion device, which has a compact structure, a small volume and is relatively space-saving.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An automatic infusion device comprises a tube body, a liquid storage cavity arranged in the tube body, a liquid outlet exposed at one end of the tube body and connected to the liquid storage cavity, and a piston drive assembly for driving the liquid in the liquid storage cavity to feed outward, wherein the piston drive assembly is threadedly connected to the tube body and moves back and forth along the length direction of the tube body.

[0006] Wherein, the inner wall of the tube body is provided with an internal thread which is threadedly connected to the piston drive assembly.

[0007] Wherein, a liquid storage tube for forming the liquid storage cavity is arranged in the tube body, and the liquid storage cavity is isolated from the internal thread by the tube wall of the liquid storage tube.

[0008] Wherein, the wall thickness of the liquid storage tube is greater than 0.02 mm and less than 0.2 mm.

[0009] Among them, the piston drive assembly includes a bracket, a motor fastened to the bracket, a piston rotatably connected to the driving end of the motor, and an external threaded sleeve arranged on the outer circumferential surface of the motor for cooperating with the internal thread, and the external threaded sleeve is coaxially fastened to the driving end of the motor.

[0010] Wherein, the external thread of the external threaded sleeve is embedded with a cutting piece for cutting the tube wall of the liquid storage cavity.

[0011] Wherein, the cutting element is configured as a heating wire or a metal sheet with a cutting edge.

[0012] Wherein, the bracket includes a crossbeam and a base fastened to the motor, and the crossbeam is fastened to the base.

[0013] Wherein, two opposite inner side walls of the tube body are provided with sliding grooves along the length direction, two ends of the cross beam are slidably matched with the sliding grooves, and the lower bottom surfaces of the two ends of the cross beam are provided with cutting blades.

[0014] The liquid storage cavity is cylindrically arranged, and the lower port of the liquid storage cavity is sealed and fastened to a step surface arranged on the inner bottom surface of the tube body.

[0015] The beneficial effects of the present invention are as follows: the present invention discloses an automatic infusion device, including a tube body, a liquid storage cavity arranged in the tube body, a liquid outlet exposed at one end of the tube body and connected with the liquid storage cavity, and a piston driving assembly driving the liquid in the liquid storage cavity to feed outward, the piston driving assembly being threadedly connected to the tube body and reciprocating along the length direction of the tube body. The automatic infusion device designed with this structure, through the threaded connection between the piston driving assembly and the tube body, enables the piston driving assembly to move along the length direction of the tube body, and then pushes the liquid medicine in the liquid storage cavity out of the liquid outlet, thereby completing the injection of the liquid medicine. The present invention has a compact structure and a small size, can automatically complete the injection of the liquid medicine through the movement of the piston driving assembly, and is convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an exploded view of an automatic infusion device in this embodiment;

[0017] Figure 2 yes Figure 1 Assembly drawing of

[0018] Figure 3 yes Figure 1 Exploded view of the piston drive assembly.

[0019] In the figure:

[0020] 1. Tube body; 11. Internal thread; 12. Liquid storage tube; 13. Slide groove; 2. Liquid outlet; 3. Piston drive assembly; 31. Bracket; 311. Crossbeam; 3111. Cutting blade; 312. Base; 32. Motor; 33. Piston; 34. External thread sleeve. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0022] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0024] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0025] Figure 1 is an exploded view of an automatic infusion device in this embodiment, Figure 2 yes Figure 1 Assembly drawing of Figure 3 yes Figure 1 Exploded view of the piston drive assembly. Figures 1 to 3 As shown, the automatic infusion device in this embodiment includes a tube body 1, a liquid storage cavity arranged in the tube body 1, a liquid outlet 2 exposed at one end of the tube body 1 and connected with the liquid storage cavity, and a piston driving assembly 3 for driving the liquid in the liquid storage cavity to feed outward. After the piston driving assembly 3 is threadedly connected to the tube body 1, it can move back and forth along the length direction of the tube body 1, so as to push the liquid medicine in the liquid storage cavity to flow out from the liquid outlet 2. The automatic infusion device designed with this structure is not only compact in structure and small in size, but also can automatically complete the injection of liquid medicine.

[0026] Specifically, in order to facilitate the threaded connection with the piston drive assembly 3 in this embodiment, as a preference, an internal thread 11 threadedly connected to the piston drive assembly 3 is provided on the inner wall of the tube body 1 in this embodiment.

[0027] Furthermore, in order to prevent the medical solution loaded into the liquid storage chamber from seeping into the internal thread 11, the present embodiment also provides a liquid storage tube 12 for forming the liquid storage chamber in the tube body 1, so that the liquid storage chamber and the internal thread 11 are isolated from each other through the tube wall of the liquid storage tube 12, and then the piston 33 of the piston drive assembly 3 slides along the tube wall of the liquid storage tube 12.

[0028] As a further preference, in order to facilitate the movement of the piston drive assembly 3 in this embodiment, the wall thickness of the liquid storage tube 12 is greater than 0.02 mm and less than 0.2 mm, preferably 0.1 mm.

[0029] To be more specific, the piston drive assembly 3 in this embodiment includes a bracket 31, a motor 32 fastened to the bracket 31, a piston 33 rotatably connected to the driving end of the motor 32, and an external threaded sleeve 34 arranged on the outer peripheral surface of the motor 32 for cooperating with the internal thread 11. The external threaded sleeve 34 is coaxially fastened to the driving end of the motor 32, so that the motor 32 drives the external threaded sleeve 34 to engage with the internal thread 11, thereby causing the piston 33 to push the liquid in the liquid storage chamber forward.

[0030] Furthermore, in order to facilitate the piston drive assembly 3 to move smoothly along the tube body 1 after cooperating with the internal thread 11 on the inner wall of the tube body 1, the present embodiment further embeds a cutting piece for cutting the tube wall of the liquid storage tube 12 on the external thread of the external threaded sleeve 34, thereby cutting open the tube wall of the liquid storage tube 12 in the hole between the internal thread 11 and the external thread, so that the piston drive assembly 3 can be smoothly fed along the tube body 1. In the present embodiment, since the tube wall thickness of the liquid storage tube 12 is relatively thin, the waste liquid storage tube 12 after cutting can be accommodated by utilizing the matching gap between the internal thread 11 and the external thread, and will not affect the normal engagement of the internal thread 11 and the external thread.

[0031] Furthermore, the cutting member in this embodiment can be set as a heating wire or a metal sheet with a cutting edge, that is, the heat of the heating wire is used to melt the tube wall of the empty tube of the liquid storage tube 12, or the sharp cutting edge of the metal sheet embedded in the external thread is used to cut the tube wall of the empty tube of the liquid storage tube 12, thereby meeting the advancement of the piston drive assembly 3.

[0032] Furthermore, the bracket 31 in this embodiment includes a crossbeam 311 and a base 312 fastened to the motor 32, and the crossbeam 311 is fastened to the base 312. Furthermore, the lower bottom surfaces at both ends of the crossbeam 311 are respectively provided with cutting blades 3111. In addition, two opposite inner walls of the tube body 1 are provided with slide grooves 13 along the length direction, and the two ends of the crossbeam 311 are slidably matched with the slide grooves 13, so that the tube wall of the empty liquid storage tube 12 is cut open by the cutting blades 3111 arranged at both ends of the crossbeam 311, thereby ensuring that the piston drive assembly 3 is not blocked by the tube wall of the liquid storage tube 12 while moving stably.

[0033] As a further preference, the liquid storage tube 12 in this embodiment is cylindrical, and the lower end of the liquid storage tube 12 is sealed and fastened with the step surface arranged on the inner bottom surface of the tube body 1 by glue or a sealing structure, so as to meet the storage of the liquid medicine; this embodiment can also adopt the method of directly placing the liquid storage tube 12 with the inner bottom surface into the cavity of the tube body 1, and connecting the inner bottom surface of the liquid storage tube 12 with the liquid outlet 2. The specific structural setting of this part is relatively common in the relevant technology, and will not be described in detail here.

[0034] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An automatic infusion device, characterized in that: It comprises a tube body, a liquid storage cavity arranged in the tube body, a liquid outlet exposed at one end of the tube body and connected with the liquid storage cavity, and a piston driving assembly driving the liquid in the liquid storage cavity to feed outward, wherein the piston driving assembly is threadedly connected to the tube body and reciprocates along the length direction of the tube body; The inner wall of the tube body is provided with an internal thread which is threadably connected to the piston drive assembly; The piston drive assembly includes a bracket, a motor fastened to the bracket, a piston rotatably connected to the driving end of the motor, and an external thread sleeve arranged on the outer peripheral surface of the motor for matching with the internal thread, and the external thread sleeve is coaxially fastened with the driving end of the motor; a liquid storage tube for forming the liquid storage cavity is arranged in the tube body, and the liquid storage cavity is isolated from the internal thread by the tube wall of the liquid storage tube; The external thread of the external threaded sleeve is embedded with a cutting piece for cutting the tube wall of the liquid storage tube, so as to cut the tube wall of the liquid storage tube between the internal thread and the external thread, and the cut liquid storage tube is accommodated by utilizing the matching gap between the internal thread and the external thread.

2. An automatic infusion device according to claim 1, characterized in that: The wall thickness of the liquid storage tube is greater than 0.02 mm and less than 0.2 mm.

3. The automatic infusion device according to claim 1, characterized in that: The cutting element is configured as a heating wire or a metal sheet with a cutting edge.

4. The automatic infusion device according to claim 1, characterized in that: The bracket includes a crossbeam and a base fastened to the motor, and the crossbeam is fastened to the base.

5. An automatic infusion device according to claim 4, characterized in that: Two opposite inner side walls of the tube body are provided with sliding grooves along the length direction, two ends of the cross beam are slidably matched with the sliding grooves, and the lower bottom surfaces of the two ends of the cross beam are provided with cutting blades.

6. The automatic infusion device according to claim 1, characterized in that: The liquid storage cavity is arranged in a cylindrical shape, and the lower end of the liquid storage cavity is sealed and fastened to a step surface arranged on the inner bottom surface of the tube body.

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