A timed quantitative injection device

Abstract

The present invention relates to a timed quantitative injection device, which has the following structure: the top surface and the upper side wall of the shell are both half-open, a semicircular hole is provided on the top surface, and a slot is provided on the side wall of the semicircular hole. The bottom cover is detachably connected to the lower port of the shell. The limit plate is horizontally fixed in the inner cavity of the shell, and the limit plate has a through hole. The airbag is a columnar structure, and the center thereof has a channel vertically penetrating the airbag. The airbag is arranged in the inner cavity of the shell, and the top of the airbag is connected to the lower surface of the limit plate. The lower end of the elastic component is fixed on the bottom surface of the bottom cover, and the upper end of the elastic component is connected to the horizontal top plate. The lower end of the ejector rod passes through the through hole and the channel and is supported on the top plate, and the ejector rod can move freely up and down in the through hole and the channel; the upper end of the ejector rod is connected to a height adjuster, and the height adjuster is located directly below the semicircular hole. The injection device of the present invention is a purely mechanical structure, can work without electricity, and is more reliable, simple and low-cost than the existing injection pump.

Description

Technical Field

[0001] The invention relates to the technical field of timed syringes, in particular to a timed quantitative injection device. Background Art

[0002] The information disclosed in the background of the invention is only intended to enhance the understanding of the overall background of the invention and should not be necessarily regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] The use of drugs in anesthesia surgery not only requires high dosage, but also has strict requirements on the injection speed. The dosage of drugs is relatively easy to master, and it can generally be calculated according to kilograms of body weight or body surface area. However, if the injection speed is to be strictly controlled, it is currently difficult to achieve the requirement by manual force alone. If the infused drug requires a slow infusion of half an hour, in this case, in addition to the use of a large electronic infusion pump, manual force alone is very laborious and will also take up a lot of time for anesthesiologists or nurses, which happens to be the most tense time for anesthesia induction and puncture.

[0004] There are not many electronic infusion pumps in each operating room, and most of them are used for anesthesia induction and other drugs that require strict control of dosage and infusion speed. At present, some drugs in clinical practice, such as antibiotics, dexmedetomidine and traditional Chinese medicine preparations, are disposable drugs and have certain infusion time restrictions. Antibiotics and traditional Chinese medicine preparations generally require more than half an hour to be infused; dexmedetomidine requires 10 to 15 minutes to be infused. If electronic pumps are used for these drugs, although they are very accurate, they occupy material resources, and debugging requires certain skills and time. Summary of the invention

[0005] In view of the above problems, the present invention provides a timed quantitative injection device, which is a purely mechanical structure and can work without electricity. Compared with the existing electronic pump, it is more reliable and simple, low-cost, easy to use, and more suitable for clinical use. To achieve the above purpose, the technical solution of the present invention is as follows.

[0006] A timed quantitative injection device comprises: a shell, a bottom cover, a limit plate, an airbag, an air pipe, a control valve, an elastic component, a top plate, a push rod and a height adjuster, wherein: the top surface and the upper side wall of the shell are both half-open, and a semicircular hole is provided on the top surface, and a slot is provided on the side wall of the semicircular hole to clamp the tail end wings of the syringe. The bottom cover is detachably connected to the lower port of the shell. The limit plate is horizontally fixed in the inner cavity of the shell, and the limit plate has a through hole. The airbag is a columnar structure, and the center has a channel vertically penetrating the airbag. The airbag is arranged in the inner cavity of the shell, and the top of the airbag is connected to the lower surface of the limit plate. One end of the air pipe is connected to the airbag, and the other end is connected to the control valve. The lower end of the elastic component is fixed to the bottom surface of the bottom cover, and the upper end of the elastic component is connected to the top plate arranged horizontally below the airbag. The lower end of the push rod passes through the through hole and the channel and is supported on the top plate, and the push rod can move freely up and down in the through hole and the channel; the upper end of the push rod is connected to the height adjuster, and the height adjuster is located directly below the semicircular hole.

[0007] Furthermore, the height adjuster comprises a sleeve and a fixing bolt, wherein: the sleeve is sleeved on the upper end of the mandrel, a threaded hole for matching with the bolt is provided on the side wall of the sleeve, and one end of the fixing bolt passes through the threaded hole and abuts against the side wall of the mandrel.

[0008] Furthermore, a groove is provided at the top end of the sleeve, and the size of the groove is larger than the size of the rear end of the push rod of the medical syringe, so that the rear end of the push rod can be engaged in the groove.

[0009] Furthermore, the side wall of the airbag is a wave-like structure, so that the airbag can be folded in an orderly manner when squeezed by the elastic component and the top plate.

[0010] Furthermore, the shape of the limiting plate is any one of a circular plate, a square plate, etc., and its main function is to limit the upward movement of the airbag.

[0011] Furthermore, the air pipe is a flexible plastic pipe, a pipe hole is opened on the side wall of the shell, and the diameter of the pipe hole is larger than the diameter of the air pipe. The air pipe is connected with the control valve after passing through the pipe hole.

[0012] Furthermore, the elastic component includes any one of a metal spring, a plastic spring, etc., and its main function is to cooperate with the airbag to achieve timed and quantitative injection.

[0013] Furthermore, the diameter of the top plate is larger than the diameter of the channel of the airbag to ensure that the top plate will not enter the channel when squeezing the airbag, causing the elastic component to be unable to control the pushing of medicine well.

[0014] Furthermore, the control valve is also connected to an interface that can be connected to an inflation device to facilitate re-inflation of the airbag.

[0015] Furthermore, it also includes a medical disposable syringe, the tail end of the syringe is clamped in the clamping groove, and the lower end of the push rod of the syringe is facing the upper end surface of the height adjuster.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The timed quantitative injection device of the present invention is a purely mechanical structure, which does not require electrical assistance during the drug delivery process. It is not only low-cost and easy to use, but also less affected by objective factors such as damage to the power device and insufficient power compared to devices that require electrical power to deliver drugs.

[0018] (2) The timed quantitative injection device of the present invention cleverly utilizes the mutual restraint and alternation of the airbag and the elastic component to achieve the timed quantitative injection of the liquid medicine in the syringe, and is reliable in operation and convenient for clinical use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] Figure 1 Schematic diagram of the structure of the timing and quantitative injection device in an embodiment of the present invention.

[0021] Figure 2 It is a cross-sectional view of the timed and quantitative injection device in an embodiment of the present invention.

[0022] Figure 3 Schematic diagram of the structure of the airbag in an embodiment of the present invention.

[0023] Figure 4 Schematic diagram of the structure of the limiting plate in the embodiment of the present invention.

[0024] Figure 5 Schematic diagram of the structure of the top plate in an embodiment of the present invention.

[0025] Figure 6 It is a cross-sectional view of the timing and quantitative injection device in the embodiment of the present invention in the use state.

[0026] The marks in the above figure represent respectively: 1-housing, 2-bottom cover, 3-limiting plate, 4-airbag, 5-trachea, 6-control valve, 7-elastic component, 8-top plate, 9-top rod, 10-height adjuster, 11-syringe, 12-push rod, 1.1-top surface, 1.2-semicircular hole, 1.3-card slot, 3.1-through hole, 4.1-channel, 10.1-sleeve, 10.2-fixing bolt, 10.3-groove. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0028] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or component needs to have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0029] As mentioned above, although the timed quantitative injection of drugs can be performed by electronic pumps, such devices are relatively complicated to operate, require certain skills and time for debugging, and are relatively expensive. To this end, the present invention proposes a purely mechanical timed quantitative injection device, which is now further described in conjunction with the accompanying drawings and specific embodiments of the specification.

[0030] refer to Figures 1 to 6 , an example of a timed quantitative injection device, including: a housing 1, a bottom cover 2, a limit plate 3, an air bag 4, an air pipe 5, a control valve 6, an elastic component 7, a top plate 8, a push rod 9 and a height adjuster 10, the injection device is made of plastic as a whole, wherein:

[0031] refer to Figure 1 , Figure 2 and Figure 6 The shell 1 is cylindrical and has a cylindrical inner cavity to accommodate various components. The top surface 1.1 and the upper side wall of the shell 1 are both half-open, that is, a semi-circular plate is connected to the circular upper port of the shell 1 as the top surface 1.1, and the top surface 1.1 blocks half of the circular upper port of the shell 1, while the other half of the upper port is open. Only half of the upper part of the shell 1 has a side wall, which is exactly opposite to the top surface 1.1, so that the upper part of the shell 1 is open.

[0032] The reason for this design is that before injection, the syringe 11 storing a fixed amount of liquid medicine needs to be detachably fixed on the top surface 1.1, and then the push rod 12 of the syringe 11 is pushed by the push rod 9 to achieve injection of the liquid medicine. At the same time, since the length of the push rod 12 extending out of the syringe varies with the amount of liquid medicine stored in the syringe 11, when installing the syringe 11, it may be necessary to adjust the height adjuster 10 so that the tail end of the push rod contacts the upper end of the height adjuster to push the push rod 12 for injection. In this case, when the upper part of the housing 1 is in an open state, the medical staff can conveniently manually adjust the height adjuster 10 to achieve the above purpose.

[0033] Furthermore, a semicircular hole 1.2 is provided at the center of the top surface 1.1, and a slot 1.3 is provided on the side wall of the semicircular hole 1.2. When injecting, the two wings of the tail end of the syringe 12 are engaged in the slot 1.3. The top surface 1.1 of this structure can conveniently detachably fix the syringe 11 after the liquid medicine is absorbed on the top surface 1.1, and is generally applicable to existing disposable medical syringes, so that the injection device of the present invention has good versatility.

[0034] The limiting plate 3 is a circular plate, which is horizontally fixed on the inner cavity side wall of the shell 1, and a through hole 3.1 for the push rod 9 to pass through is opened at the center of the limiting plate 3, and the through hole 3.1 is opposite to the semicircular hole 1.2 above. The main function of the limiting plate 3 is to constrain the airbag 4 to move upward and ensure that the airbag 4 and the elastic component 7 cooperate to achieve timed injection. Therefore, it should be understood that the limiting plate 3 can also be a rectangular or square plate, which is fixed on the side wall of the inner cavity of the shell 1 to constrain the airbag 4. At this time, the inner cavity of the shell 1 can be different from the shape of the limiting plate 3, and the edge of the limiting plate 3 may not be completely connected to the inner cavity side wall of the shell 1, as long as part of the edge of the limiting plate 3 is fixed on the inner cavity side wall of the shell 1.

[0035] The airbag 4 is a cylindrical structure made of flexible plastic, with a channel 4.1 vertically penetrating the airbag 4 at its center, and the side wall of the channel is sealed to the airbag, and the airbag 4 is arranged below the limit plate 3 in the inner cavity of the shell 1, and the top of the airbag 4 is connected to the lower surface of the limit plate 3. Furthermore, the side wall of the airbag 4 is a wave-like structure, so that the airbag can be folded in an orderly manner when squeezed by the elastic component 7 and the top plate 8, and can be stretched out in an orderly manner after being inflated.

[0036] The trachea 5 is a flexible plastic tube. A tube hole is opened on the side wall of the shell 1, and the diameter of the tube hole is larger than the diameter of the trachea 5. The trachea 5 is connected with the control valve 6 after passing through the tube hole, so that when the airbag 4 moves, the trachea 5 can also move with the airbag, avoiding the trachea 5 affecting the deployment of the airbag 6.

[0037] The elastic component 7 is a metal spring, the lower end of which is fixed to the bottom surface of the housing 1, and the upper end of the elastic component 7 is connected to the horizontally arranged top plate 8. The lower end of the top rod 9 passes through the through hole 3.1 and the channel 4.1 and extends to the upper surface of the top plate 8, and the top rod 9 can move freely up and down in the through hole 3.1 and the channel 4.1.

[0038] The diameter of the top plate 8 is larger than the diameter of the channel 4.1 to ensure that the top plate 8 will not enter the channel 4.1 when squeezing the airbag 4, resulting in the elastic component 7 being unable to control the drug push well. The control valve 6 is also connected to an interface that can be connected to an inflation device to facilitate re-inflation of the airbag 4.

[0039] When in use, the airbag 4 is inflated through the inflation device. At this time, the airbag can only stretch downward due to the constraint of the limit plate 3. After the airbag is inflated. The control valve 6 is adjusted to the set deflation rate. As the gas in the airbag 4 is gradually discharged, the top plate 8 and the elastic component 7 begin to move upward, thereby driving the top rod 9 and the piston to squeeze out the liquid in the syringe 1. By controlling the exhaust time, the injection time is controlled. It should be noted that the timing and quantitative control described in the present invention refers to controlling the injection to be completed within a certain time range (such as 10 to 15 minutes), and does not need to be accurate to a very specific time. Therefore, the purpose of the present invention can be achieved by adjusting the exhaust rate through the control valve 6.

[0040] Finally, it should be noted that any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. Although the above describes the specific implementation of the present invention in conjunction with the drawings, it is not a limitation of the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the present invention.

Claims

1. A timed and quantitative injection device, comprising: A shell, wherein the top surface and upper side walls of the shell are both half-open, and a semicircular hole is provided on the top surface, and a card slot is provided on the side wall of the semicircular hole; A bottom cover, the bottom cover being detachably connected to the lower port of the housing; A limit plate, the limit plate is horizontally fixed in the inner cavity of the shell, and has a through hole; The airbag is a columnar structure with a passage running vertically through the airbag at its center, the airbag is arranged in the inner cavity of the shell, and the top end of the airbag is connected to the lower surface of the limiting plate; An air pipe, one end of which is connected to the air bag, and the other end of which is connected to the control valve; An elastic component, wherein the lower end of the elastic component is fixed to the bottom surface of the bottom cover, and the upper end of the elastic component is connected to a top plate horizontally arranged below the airbag; A push rod, the lower end of which passes through the through hole or the channel and is supported on the top plate, and the push rod can freely move up and down in the through hole or the channel; and A height adjuster is connected to the upper end of the top rod and faces the semicircular hole.

2. The timed quantitative injection device according to claim 1, characterized in that: The height adjuster includes a sleeve and a fixing bolt, wherein: the sleeve is sleeved on the upper end of the push rod; a threaded hole matched with the bolt is opened on the side wall of the sleeve, and one end of the fixing bolt passes through the threaded hole and abuts against the side wall of the push rod.

3. The timed quantitative injection device according to claim 2, characterized in that: The top end of the sleeve is provided with a groove, and the size of the groove is larger than the size of the rear end of the push rod of the medical syringe.

4. The timed quantitative injection device according to claim 1, characterized in that: The side wall of the airbag is a wave-like structure.

5. The timed quantitative injection device according to claim 1, characterized in that: The shape of the limiting plate is any one of a circular plate and a square plate.

6. The timed quantitative injection device according to claim 1, characterized in that: The elastic component includes any one of a metal spring and a plastic spring.

7. The timed quantitative injection device according to claim 1, characterized in that: The air pipe is a flexible plastic pipe. A pipe hole is provided on the side wall of the shell, and the diameter of the pipe hole is larger than the diameter of the air pipe. The air pipe is connected with the control valve after passing through the pipe hole.

8. The timed quantitative injection device according to claim 1, characterized in that: The top plate has a diameter greater than a diameter of the passage of the airbag.

9. The timed quantitative injection device according to claim 1, characterized in that: The control valve is also connected with an interface that can be connected to an inflation device.

10. The timed quantitative injection device according to any one of claims 1 to 9, characterized in that: It also includes a disposable medical syringe, the tail end of which is clamped in the clamping groove, and the lower end of the push rod of the syringe is directly facing the upper end surface of the height adjuster.

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