A syringe assist device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEALINNO (BEIJING) MEDICAL TECH CO LTD
- Filing Date
- 2025-08-01
- Publication Date
- 2026-07-21
AI Technical Summary
Existing syringes suffer from air bubbles remaining in the liquid during injection, affecting accuracy, leading to complex and costly operations, and conventional three-way valve-assisted infusion operations are difficult to effectively remove gas.
Design a syringe auxiliary device comprising a first channel, a second channel, a third channel, and a fourth channel. Switching between venting, filling, and injection modes is achieved by moving the first sealing plug. Gas is expelled by squeezing the filling liquid, simplifying operation.
It simplifies the gas removal process, reduces suction operations, lowers costs, and improves injection accuracy and ease of operation.
Smart Images
Figure CN224523733U_ABST
Abstract
Description
Technical Field
[0001] This application relates to a syringe auxiliary device that can conveniently expel gas from the syringe. Background Technology
[0002] In fields such as medical care, health, and food, there are many micro-injection operations that require precise flow control. However, during injection, residual air bubbles in the liquid can deform due to pressure changes, thus affecting injection accuracy. Therefore, it is essential to strictly control the residual gas in the syringe during injection operations.
[0003] Therefore, the capacity of syringes used in operations is generally larger than the required liquid volume. The extra liquid is used to remove air bubbles and fill the tubing. Because syringes have high precision requirements, their cost is also relatively high, and the cost is positively correlated with the capacity. In some application scenarios, syringes are cost-sensitive consumables, and there is a great need to reduce costs.
[0004] If a conventional three-way valve is used to assist in infusion, aspiration is usually required to expel the air from the syringe when infusing liquid into it. This process is complex and sometimes it is difficult to ensure that all air bubbles are removed.
[0005] Therefore, in the existing technology, how to conveniently expel the gas from the syringe has become a technical challenge. Utility Model Content
[0006] The purpose of this application is to provide a syringe auxiliary device that can conveniently expel gas from the syringe. To achieve the above objectives, one solution of this application is a syringe auxiliary device comprising a first sealing plug and a first channel, a second channel, a third channel, and a fourth channel; one end of the second channel is connected to an external liquid reservoir, and the other end is connected to the first channel and the third channel respectively; one end of the third channel is connected to the liquid reservoir, and the other end is connected to the first channel and the second channel respectively; the first channel, the second channel, and the third channel converge at a junction T to form a three-way structure; the fourth channel is connected to the third channel at a junction M in the middle of the third channel; wherein, the first channel functions as an inlet channel and the fourth channel functions as an outlet channel; the first sealing plug is configured to be movable within the first channel or across the junction T and within the third channel; by moving the first sealing plug, the syringe auxiliary device can switch between an venting mode and an injection mode; in the venting mode, liquid in the first channel can enter the liquid reservoir and expel gas from the liquid reservoir; in the injection mode, liquid in the liquid reservoir can be discharged through the fourth channel.
[0007] In a preferred embodiment, when the first sealing plug is in a predetermined first position, the corresponding venting mode is as follows: in this venting mode, the first channel and the second channel are connected; the fourth channel and the third channel are connected, and the third channel and the second channel are separated by the first sealing plug; wherein, the second channel functions as an injection channel, and the third channel functions as an venting channel; the liquid in the first channel enters the storage tank through the second channel, thereby compressing the gas in the storage tank and causing it to be discharged through the third channel and the fourth channel.
[0008] In a preferred embodiment, when the first sealing plug is in a predetermined second position, the injection mode is as follows: in this injection mode, the first channel and the second channel are separated by the first sealing plug, and the fourth channel is connected to the third channel and / or the second channel; wherein, the second channel and the third channel function as drainage channels; the liquid in the storage tank can enter the fourth channel through the third channel and / or the second channel and be discharged.
[0009] In a preferred embodiment, when the first sealing plug is in a predetermined third position, the filling mode is corresponding to the filling mode; the filling mode is entered when all the gas in the liquid storage tank and the third channel is discharged, in which the fourth channel and the third channel are separated, and the liquid in the first channel enters the liquid storage tank via the second channel.
[0010] In a preferred embodiment, the first position refers to the position where the first sealing plug crosses the junction T and enters the third channel from the first channel, but has not yet reached the junction M.
[0011] In a preferred embodiment, the second position refers to the first sealing plug being completely within the first channel or at the junction T.
[0012] In a preferred embodiment, the third position refers to the position where the first sealing plug is located at the junction M.
[0013] In a preferred embodiment, the first channel is also connected to an expandable gas-liquid separator.
[0014] The syringe auxiliary device of the above embodiments of this application can switch between venting, filling and injection modes by moving the first sealing plug. It uses the squeezing of the filling liquid to expel the gas in the syringe reservoir, reducing the suction operation, simplifying the device structure, and making it easy to remove the gas in the syringe. Attached Figure Description
[0015] To more clearly illustrate this application, the accompanying drawings will be described and explained below. Obviously, the drawings described below only illustrate certain aspects of some exemplary embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.
[0016] Figure 1 This is a schematic diagram of the connection between the syringe auxiliary device and the syringe.
[0017] Figure 2 This is a schematic diagram of the syringe auxiliary device in the venting mode.
[0018] Figure 3 This is a schematic diagram of the syringe auxiliary device in the infusion mode.
[0019] Figure 4 This is a schematic diagram of the syringe auxiliary device in injection mode.
[0020] Attached image caption:
[0021] 1 First Channel
[0022] 2 Second Channel
[0023] 3 Third Channel
[0024] 4. Fourth Channel
[0025] 51 First sealing plug
[0026] 52 Second sealing plug
[0027] 53-link
[0028] 54 controller
[0029] 6. Syringe for operation
[0030] 61 Liquid Storage Tank
[0031] 62 piston
[0032] 7 Gas-Liquid Separation Section Detailed Implementation
[0033] Various exemplary embodiments of this application are described in detail below with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the application or its application or use. This application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise stated, the relative arrangement of components and steps, numerical expressions, and values set forth in these embodiments should be interpreted as merely exemplary and not as limiting.
[0034] As used in this application, the words “including” or “comprising” or similar terms mean that the element preceding the word covers the element listed after the word, and do not exclude the possibility that it may also cover other elements.
[0035] All terms used in this application (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as being interpreted with idealized or highly formalized meanings, unless explicitly defined herein.
[0036] For components, specific model numbers and other parameters of components not described in detail in this section, the interrelationships between components and control circuits, these may be considered as techniques, methods and devices known to those skilled in the art, but where appropriate, such techniques, methods and devices should be considered part of the specification.
[0037] Syringe auxiliary device
[0038] The following is for reference Figure 1-4 The syringe auxiliary device of this application will be described in detail. Figure 1 This is a connection diagram of the syringe auxiliary device and the syringe. Figure 2 This is a schematic diagram of the syringe auxiliary device in venting mode. Figure 3 This is a schematic diagram of the syringe auxiliary device in infusion mode. Figure 4 This is a schematic diagram of the syringe auxiliary device in injection mode.
[0039] See Figure 1The syringe auxiliary device of this application includes a first channel 1, a second channel 2, a third channel 3, and a fourth channel 4. In practical applications, this syringe auxiliary device is typically connected to the reservoir 61 of the working syringe 6. One end of the second channel 2 is connected to the reservoir 61, and the other end is connected to both the first channel 1 and the third channel 3. One end of the third channel 3 is connected to the reservoir 61, and the other end is connected to both the first channel 1 and the second channel 2. That is, both the second channel 2 and the third channel 3 are connected to the reservoir 61, and the first channel 1, the second channel 2, and the third channel 3 converge at one point to form a three-way structure. For ease of explanation, the convergence point of the first channel 1, the second channel 2, and the third channel 3 will be referred to as the convergence point T. Although details will be provided later, the first channel 1 and the third channel 3 should be directly connected at the convergence point T so that the first sealing plug 51, described later, can pass through the convergence point T and enter the third channel 3 from the first channel 1.
[0040] Furthermore, the fourth channel 4 is connected to the third channel 3 at a midway point. Here, the first channel 1 functions as the inlet channel of the syringe auxiliary device, and the fourth channel 4 functions as the outlet channel of the syringe auxiliary device. For ease of explanation, the intersection of the fourth channel 4 and the third channel 3 will be referred to as the intersection point M. In addition, the distance between the intersection point M and the intersection point T should satisfy the stroke of the first sealing plug 51, which will be described later.
[0041] It should be noted that the working syringe 6 and the infusion syringe described later are both external devices and are not part of the syringe auxiliary device of this application. They only connect with the syringe auxiliary device of this application during operation and work together.
[0042] For ease of explanation, such as Figure 1 As shown, in this application, the syringe 6 is positioned above the fourth channel 4, and vice versa. In the horizontal direction perpendicular to the vertical direction, the first channel 1 is located to the right of the third channel 3, and vice versa. Unless otherwise specified, the descriptions of orientation will follow the same pattern. However, the orientations shown in the illustrations are not intended to limit the actual orientation of the components during use. Here, the first channel 1 is a horizontally oriented conduit, the second channel 2 and the fourth channel 4 are vertically oriented conduits, and the third channel 3 can be a bent conduit as shown, or an arc-shaped conduit or other irregularly shaped conduit. The shapes and orientations of the channels in the illustrations are merely examples; as long as the aforementioned connection relationships of the channels are satisfied, they are included within the scope of protection of this invention. As shown, the intersection point M is located to the left of the intersection point T.
[0043] As a preferred method, such as Figure 1The upper end of the second channel 2 passes through the third channel 3 and enters the liquid storage tank 61, that is, the second channel 2 is partially covered by the third channel 3. In fact, it is not limited to this. It is also possible that the upper end of the third channel 3 passes through the second channel 2 and enters the liquid storage tank 61, that is, the third channel 3 is partially covered by the second channel 2. It is also possible that both enter the liquid storage tank 61 in parallel. Here, no specific limitation is made.
[0044] Preferably, the syringe auxiliary device further includes a first sealing plug 51 and a second sealing plug 52, wherein the first sealing plug 51 is controlled to move left and right via a connecting rod 53, and the second sealing plug 52 is located within the first channel 1, further to the right of the first sealing plug 51. The position of the second sealing plug 52 can be fixed within the first channel 1, or it can move within the first channel 1 in the same manner as the first sealing plug 51. The connecting rod 53 is arranged to pass through the second sealing plug 52.
[0045] As an example, the connecting rod 53 has a hollow structure, with a small hole on the left side of the portion located on the second sealing plug 52. The right end of the connecting rod 53 is located inside the controller 54 and connects to an external liquid channel, allowing external liquid to enter the connecting rod 53 and then enter the first channel 1 through the small hole on its left side. The second sealing plug 52 prevents the liquid in the first channel 1 from flowing back to the right. The stroke of the second sealing plug 52 should be set so that it always remains within the first channel 1 and does not cross the junction point T to enter the second channel 2 or the third channel 3. Alternatively, the second sealing plug 52 can be omitted, and the liquid inlet end of the first channel 1 can be blocked, which can also achieve the function of the second sealing plug 52.
[0046] As a preferred method, when the first sealing plug 51 is in Figure 2 The first position shown corresponds to the exhaust mode. For example, the first position here means that the first sealing plug 51 moves to the left of the junction point T and enters the third channel 3, but has not yet reached the junction point M; that is, the first sealing plug 51 is located between the junction point T and the junction point M. At this time, the first channel 1 is connected to the second channel 2; the fourth channel 4 is connected to the third channel 3; and the third channel 3 is separated from the second channel 2 by the first sealing plug 51.
[0047] In this system, the second channel 2 functions as an injection channel, and the third channel 3 functions as an exhaust channel. Liquid from the first channel 1 is injected into the storage tank 61 via the second channel 2. Simultaneously, the liquid compresses the gas within the storage tank 61, forcing it through the third channel 3 into the fourth channel 4, and ultimately exiting through the fourth channel 4. This eliminates the need for suction of the gas within the storage tank 61; the gas is emptied solely by the compression of the injected liquid. Simultaneously, the gas within the third channel 3 is also forced into the fourth channel 4 for exhaust; that is, the liquid injected into the storage tank 61 also enters the third channel 3, displacing the gas within it. It is worth noting that, because the interior of the storage tank 61 is connected to the outside via the third channel 3 and the fourth channel 4 in exhaust mode, the volume of the storage tank 61 remains unchanged, serving only an exhaust function.
[0048] As a preferred method, when the first sealing plug 51 is in Figure 3 The third position shown corresponds to the infusion mode. For example, the third position here means that the first sealing plug 51 extends further into the third channel 3 from the aforementioned first position, reaching the junction point M and severing the connection between the fourth channel 4 and the third channel 3. At this time, the fourth channel 4 and the third channel 3 are separated by the first sealing plug 51, while the first channel 1 is connected to the second channel 2.
[0049] It should be noted that in the aforementioned venting mode, the gas in the liquid storage tank 61 and the third channel 3 is forced into the fourth channel 4. Only when all the gas in the liquid storage tank 61 and the third channel 3 is vented can the infusion mode be entered. At this time, the liquid storage tank 61 and the third channel 3 are already filled with liquid. The liquid in the first channel 1 continues to be injected into the liquid storage tank 61 through the second channel 2, causing the piston 62 of the working syringe 6 to rise, increasing the volume of the liquid storage tank 61, that is, increasing the liquid storage capacity of the working syringe 6, for subsequent injection.
[0050] As a preferred method, when the first sealing plug 51 is in Figure 4 The second position shown corresponds to the injection mode. For example, the second position here means that the first sealing plug 51 is completely within the first channel 1, or at the junction T, such as the position shown in the figure where the first sealing plug 51 is at or to the right of the junction T. In this case, the first channel 1 and the second channel 2 are separated by the first sealing plug 51, and the fourth channel 4 is connected to the third channel 3 and / or the second channel 2. The second channel 2 and the third channel 3 function as drainage channels.
[0051] In injection mode, pressing the piston 62 of the syringe 6 allows the liquid in the reservoir 61 to enter the fourth channel 4 through the third channel 3 and / or the second channel 2 and be discharged to the outside, facilitating subsequent operations.
[0052] As a preferred embodiment, an expandable gas-liquid separator 7 is also connected to the right side of the first channel 1. A syringe (not shown in the figure) is connected to the right side of the gas-liquid separator 7. In both venting and filling modes, the syringe injects liquid into the first channel 1 via the connecting rod 53. When switching from filling to injection mode, the first sealing plug 51, during its continued rightward movement after passing the intersection point T, pushes a small amount of liquid back into the first channel 1, thereby compressing a small amount of residual gas in the gas-liquid separator 7. After removing the syringe, the gas and liquid in the gas-liquid separator 7 are discharged.
[0053] During the injection process, once a certain amount of liquid has been discharged from the syringe 6, if it is necessary to replenish the liquid, the right side of the gas-liquid separator 7 can be reconnected to the infusion syringe for further infusion. Because the gas-liquid separator 7 is an expandable structure, any air bubbles introduced during the connection of the infusion syringe will undergo gas-liquid separation within the separator 7 and will not enter the first channel 1, thus preventing excess gas from entering the syringe 6.
[0054] In summary, this application allows switching between venting mode, filling mode, and injection mode by moving the first sealing plug 51. The gas in the liquid storage chamber 61 is expelled by the squeezing of the filling liquid, reducing the need for suction operations, simplifying the device structure, and allowing for multiple fillings during operation. It is simple to operate and low in cost, thereby facilitating the expulsion of gas from the working syringe 6 and the syringe auxiliary device of this application, and improving injection accuracy.
[0055] It should be understood that the specific embodiments described above are only used to explain this application, and the scope of protection of this application is not limited thereto. Any changes, substitutions, or combinations made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be covered within the scope of protection of this application.
Claims
1. A syringe auxiliary device, characterized in that: It includes a first sealing plug and a first channel, a second channel, a third channel, and a fourth channel; One end of the second channel is connected to the external liquid storage tank, and the other end is connected to the first channel and the third channel respectively. One end of the third channel is connected to the liquid storage tank, and the other end is connected to the first channel and the second channel respectively. The first channel, the second channel, and the third channel converge at the intersection point T to form a three-way structure. The fourth channel is connected to the third channel at the intersection point M in the middle of the third channel. The first channel functions as an inlet channel, and the fourth channel functions as an outlet channel. The first sealing plug is configured to be movable within the first channel or to move beyond the junction T within the third channel. By moving the first sealing plug, the syringe auxiliary device can be switched between an exhaust mode and an injection mode. In the exhaust mode, the liquid in the first channel can enter the storage tank and expel the gas in the storage tank; In the injection mode, the liquid in the reservoir can be discharged through the fourth channel.
2. The syringe auxiliary device according to claim 1, characterized in that: When the first sealing plug is in the specified first position, the corresponding exhaust mode is as follows: in this exhaust mode, the first channel and the second channel are connected; the fourth channel and the third channel are connected, and the third channel and the second channel are separated by the first sealing plug; The second channel functions as an injection channel, and the third channel functions as an exhaust channel. The liquid in the first channel enters the storage tank through the second channel, thereby compressing the gas in the storage tank and causing it to be discharged through the third and fourth channels.
3. The syringe auxiliary device according to claim 2, characterized in that: When the first sealing plug is in the designated second position, the corresponding injection pattern is as follows: In this injection mode, the first channel and the second channel are separated by the first sealing plug, and the fourth channel is connected to the third channel and / or the second channel; The second channel and the third channel function as drainage channels. The liquid in the storage tank can enter the fourth channel through the third channel and / or the second channel and then be discharged.
4. The syringe auxiliary device according to any one of claims 1-3, characterized in that: When the first sealing plug is in the specified third position, the corresponding filling mode is activated; With all the gas in the storage tank and the third channel completely vented, the filling mode is entered. In the infusion mode, the fourth channel is separated from the third channel, and the liquid in the first channel enters the storage tank via the second channel.
5. The syringe auxiliary device according to claim 2, characterized in that, The first position refers to the position where the first sealing plug crosses the junction point T and enters the third channel from the first channel, but has not yet reached the junction point M.
6. The syringe auxiliary device according to claim 3, characterized in that, The second position refers to the first sealing plug being completely within the first channel or at the intersection point T.
7. The syringe auxiliary device according to claim 4, characterized in that, The third position refers to the position where the first sealing plug is located at the intersection point M.
8. The syringe auxiliary device according to claim 1, characterized in that: The first channel is also connected to an expandable gas-liquid separator.