Accurate metering injector with needleless suction function
By introducing threaded rods and limiting parts into the syringe, the problem of inaccurate fluid metering caused by pushing and pulling of the piston push rod is solved, and the accuracy of fluid metering is achieved.
Patent Information
- Application Number
- CN202422115882.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-30
AI Technical Summary
Existing syringes are relatively smooth during the piston push rod pushing process, resulting in inaccurate fluid metering.
An accurate metering syringe with needle-free suction function is designed. By setting a threaded rod and a limiting member on the syringe body, the position adjustment of the limiting member is used to prevent excessive pushing or pulling out of the push plate and piston push rod, thereby achieving the accuracy of fluid metering.
By adjusting the limiting parts, the accuracy of fluid metering is ensured, the push plate and piston push rod are prevented from excessive movement, and the accuracy of fluid metering is ensured.
Smart Images
Figure CN223068880U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of syringes, in particular to a precise metering syringe with a needleless aspiration function. Background Art
[0002] A syringe is a common medical tool, mainly used for aspirating or injecting gases, liquids, etc. The definition of a syringe is a medical tool mainly composed of a syringe barrel with a small hole at the front end and a piston core rod that matches it. Its main use is to change the volume inside the syringe barrel by moving the piston, so as to aspirate or inject gases, liquids, etc. Syringes have a wide range of applications in the medical field, such as administering drugs, taking samples, etc.
[0003] In order to achieve precise metering of the liquid or gas aspirated by the syringe, at present, a scale table is often set on the outside of the syringe on the market for the user to observe. However, since the piston push rod of the syringe is relatively smooth and silky during the pushing and pulling process, this will cause the user to accidentally push the push rod too much during the aspiration process of the syringe, thus affecting the accuracy of fluid metering. Content of the Utility Model
[0004] The purpose of the utility model is to solve the defects existing in the prior art, and to propose a precise metering syringe with a needleless aspiration function.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0006] A precise metering syringe with a needleless aspiration function includes a syringe barrel body and a piston push rod. The piston push rod is movably arranged inside the syringe barrel body. One end of the piston push rod extends out of the inside of the syringe barrel body, and a push plate is fixedly arranged at the part of the piston push rod that extends out. An outer barrel edge is fixedly arranged at one end of the syringe barrel body close to the push plate. Through holes are opened at both ends of the outer barrel edge. Connecting rods are fixedly and vertically arranged on both sides of the piston push rod on the push plate, and the connecting rods all pass through the through holes.
[0007] In addition, the preferred structure is that fixing pieces are fixedly arranged at the ends of the connecting rods far from the push plate, and auxiliary holes are correspondingly and adaptively opened on the outer barrel edge on one side of the through holes for the fixing pieces.
[0008] In addition, the preferred structure is that support pieces are fixedly arranged on both sides of one end of the syringe barrel body far from the outer barrel edge, and threaded rods are fixedly and vertically arranged on the sides of the support pieces facing the outer barrel edge.
[0009] In addition, the preferred structure is that the other ends of the threaded rods are fixedly connected to the outer barrel edge. Limiting pieces are movably sleeved on the threaded rods, and threaded cavities are correspondingly and adaptively opened in the middle of the limiting pieces for the threaded rods.
[0010] In addition, a preferred structure is that a through cavity is formed in the limiting member, and the through cavity is adapted to the fixing member.
[0011] In addition, a preferred structure is that the syringe body is made of a transparent material, and a scale is provided on the outer side of the syringe body.
[0012] The beneficial effects of the present utility model are as follows: the suction of the fluid can be realized by the arrangement of the syringe body and the piston push rod. By adjusting the position of the limiting member on the threaded rod, the fixing member can be clamped at a preset position, thereby preventing the push plate and the piston push rod from being pushed in or pulled out too much, and ensuring the accuracy of fluid metering. Description of the Drawings
[0013] Figure 1 FIG. is a schematic structural diagram of a precise metering syringe with a needleless suction function proposed by the present utility model;
[0014] Figure 2 is Figure 1 a schematic structural diagram when adjusting the position of the limiting member in
[0015] Figure 3 FIG. is a schematic structural diagram of the syringe body and the threaded rod of a precise metering syringe with a needleless suction function proposed by the present utility model;
[0016] Figure 4 FIG. is a schematic structural diagram of the push plate and the connecting rod of a precise metering syringe with a needleless suction function proposed by the present utility model;
[0017] Figure 5 FIG. is a schematic structural diagram of the limiting member of a precise metering syringe with a needleless suction function proposed by the present utility model.
[0018] In the figure: 1 syringe body, 11 outer cylinder edge, 12 through hole, 13 secondary hole, 2 push plate, 21 piston push rod, 3 support member, 31 threaded rod, 32 limiting member, 33 through cavity, 34 threaded cavity, 4 connecting rod, 41 fixing member. Detailed Embodiment
[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.
[0020] Refer to Figures 1-5, A precise metering syringe with a needleless aspiration function, comprising a syringe body 1 and a piston push rod 21. The piston push rod 21 is movably arranged inside the syringe body 1. One end of the piston push rod 21 extends out from the inside of the syringe body 1, and a push plate 2 is fixedly arranged at the extended part of the piston push rod 21. An outer cylinder edge 11 is fixedly arranged at one end of the syringe body 1 close to the push plate 2. Through holes 12 are opened at both ends of the outer cylinder edge 11. Connecting rods 4 are fixedly and vertically arranged on both sides of the piston push rod 21 on the push plate 2, and the connecting rods 4 all pass through the through holes 12.
[0021] Wherein, fixing members 41 are fixedly arranged at the ends of the connecting rods 4 far from the push plate 2, and auxiliary holes 13 are correspondingly and adaptively opened on the outer cylinder edge 11 on one side of the through holes 12 corresponding to the fixing members 41. The through holes 12 are all communicated with the auxiliary holes 13, so that it not only does not affect the limit of the connecting rods 4 by the through holes 12, but also enables the connecting rods 4 and the fixing members 41 to be taken out through the through holes 12 and the auxiliary holes 13.
[0022] Wherein, support members 3 are fixedly arranged on both sides of one end of the syringe body 1 far from the outer cylinder edge 11, and threaded rods 31 are fixedly and vertically arranged on the sides of the support members 3 facing the outer cylinder edge 11. The other ends of the threaded rods 31 are fixedly connected to the outer cylinder edge 11. Limiting members 32 are movably sleeved on the threaded rods 31, and threaded cavities 34 are correspondingly and adaptively opened in the middle of the limiting members 32 for the threaded rods 31. Through the adaptive setting of the threaded cavities 34 and the threaded rods 31, the limiting members 32 can be rotated on the threaded rods 31, so as to realize the adjustment of the positions of the limiting members 32. And because there is a large damping force between the threaded rods 31 and the threaded cavities 34, it can ensure that the limiting members 32 are not easily rotated after the adjustment is completed, and a relatively large force is required to rotate them. This is prior art, so it will not be elaborated here.
[0023] Wherein, a through cavity 33 is opened on the limiting member 32, and the through cavity 33 is adapted to the fixing member 41. When the fixing member 41 passes through the through cavity 33, the limiting member 32 cannot clamp the fixing member 41.
[0024] Wherein, the syringe body 1 is made of a transparent material, and a scale table is arranged on the outer side of the syringe body 1. The specific material of the syringe body 1 and the scale table are both prior art, so it will not be elaborated here.
[0025] In this embodiment, when the user needs to push out the fluid in the syringe body 1, the limiting members 32 on the two threaded rods 31 can be rotated first. When the user rotates the limiting members 32, they can be compared with the scale table, so as to rotate the limiting members 32 to a suitable position. And it should be noted that after the rotation of the limiting members 32 is completed, the through cavities 33 on the limiting members 32 should not be aligned with the fixing members 41.
[0026] Subsequently, the user can push the piston push rod 21 inward through the push plate 2, thereby pushing the fluid out of the syringe body 1. And at this time, the connecting rod 4 moves synchronously with the push plate 2. When the fixing member 41 on the connecting rod 4 contacts the limiting member 32, the push plate 2 will be blocked and unable to be pushed at this time, thereby ensuring that the user will not push the push plate 2 too much, and thus ensuring the accuracy when the fluid is pushed out.
[0027] Furthermore, when the user needs to suck the external fluid into the syringe body 1, the through cavity 33 on the two limiting members 32 can be aligned with the fixing member 41 first, so that the fixing member 41 can be pushed behind the limiting member 32. Subsequently, the user can adjust the position of the limiting member 32. In this way, when the user pulls the push plate 2 outward to a certain distance, due to the clamping of the fixing member 41 by the limiting member 32, the push plate 2 will not be able to be pulled outward continuously, thereby ensuring the accuracy when sucking the fluid.
[0028] Furthermore, the specific structures and working methods of the syringe body 1 and the piston push rod 21 are all prior arts already disclosed in the current market, and they do not belong to the main technical problems solved in this technical solution. Therefore, they will not be elaborated in this utility model. And the limiting member 32 cannot clamp the connecting rod 4, and it can only clamp the fixing member 41 on the connecting rod 4.
[0029] In this utility model, the suction of the fluid can be realized through the setting of the syringe body 1 and the piston push rod 21. By adjusting the position of the limiting member 32 on the threaded rod 31, the fixing member 41 can be clamped at a preset position, thereby preventing the push plate 2 and the piston push rod 21 from being pushed in or pulled out too much, and ensuring the accuracy of the fluid measurement.
[0030] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent replacements or changes, and all should be covered within the protection scope of the present utility model.
Claims
1. A precise metering syringe with needleless aspiration function, comprising a syringe barrel body (1) and a piston push rod (21), characterized in that, A piston push rod (21) is movably arranged inside the syringe body (1). One end of the piston push rod (21) extends out from the inside of the syringe body (1), and a push plate (2) is fixedly arranged at the extended part of the piston push rod (21). An outer cylinder edge (11) is fixedly arranged at one end of the syringe body (1) close to the push plate (2). Through holes (12) are formed at both ends of the outer cylinder edge (11). Connecting rods (4) are fixedly and vertically arranged on both sides of the piston push rod (21) on the push plate (2), and the connecting rods (4) pass through the through holes (12). Fixing members (41) are fixedly arranged at the ends of the connecting rods (4) far from the push plate (2), and auxiliary holes (13) are correspondingly formed on the outer cylinder edge (11) on one side of the through holes (12) to be adapted to the fixing members (41). Support members (3) are fixedly arranged on both sides of the end of the syringe body (1) far from the outer cylinder edge (11), and threaded rods (31) are fixedly and vertically arranged on the sides of the support members (3) facing the outer cylinder edge (11). The other ends of the threaded rods (31) are fixedly connected to the outer cylinder edge (11). Limiting members (32) are movably sleeved on the threaded rods (31), and threaded cavities (34) are correspondingly formed in the middles of the limiting members (32) to be adapted to the threaded rods (31).
2. The precision metering syringe with needleless aspiration function according to claim 1, characterized in that, A through cavity (33) is formed in the limiting member (32), and the through cavity (33) is adapted to the fixing member (41).
3. The precise metering syringe with needleless aspiration function according to claim 1, characterized in that, The syringe body (1) is made of a transparent material, and a scale table is arranged on the outer side of the syringe body (1).