A syringe

Abstract

The invention discloses a syringe, including: a syringe, the lower end of which is provided with an injection port; a piston rod, which is movably arranged in the syringe, the piston rod can rotate in the syringe, the piston rod is provided with at least two sliding rack parts, and the tooth pitches of different sliding rack parts are all different; a step injection module, which includes a shell and a spring, the shell is installed at the upper end of the syringe, the piston rod passes through the shell up and down, the spring is installed in the shell, the rotation path of any sliding rack part intersects with the spring, and all teeth of each sliding rack part are provided with a lower avoidance surface inclined from bottom to top and outward, so that each sliding rack part moving from top to bottom can drive the spring to perform elastic avoidance. Compared with the prior art, the invention can quantify different injection speeds through the use of springs and sliding rack parts with different tooth pitches to adapt to the injection of different liquid medicines.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a syringe. Background Art

[0002] In the medical industry, injection is one of the conventional treatment methods, which uses a needle to inject liquid medicine under the skin to achieve the corresponding treatment effect. Since some liquid medicines produce obvious pain during injection, they need to be injected slowly, but currently the injection speed is mainly controlled by the subjective experience of the therapist, lacking quantifiable objective conditions. Summary of the invention

[0003] The invention aims to provide a syringe to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] A syringe according to a first aspect of the present invention comprises:

[0005] A syringe having an injection port at its lower end;

[0006] A piston rod, which is movably arranged in the syringe, the piston rod can rotate in the syringe, and the piston rod is provided with at least two sliding rack parts, and the tooth pitches of different sliding rack parts are different;

[0007] The step-by-step injection module includes a shell and a spring. The shell is installed at the upper end of the syringe. The piston rod passes through the shell up and down. The spring is installed in the shell. The rotation path of any sliding rack part intersects with the spring. All teeth of each sliding rack part are provided with a lower avoidance surface that tilts outward from bottom to top, so that each sliding rack part moving from top to bottom can drive the spring to elastically avoid. The action of the piston rod moving downward in the syringe filled with liquid medicine is called injection. During the injection process, since the lower avoidance surface can drive the spring to elastically avoid, under the elastic force of the spring, the spring will generate a certain feedback after avoiding a tooth of the sliding rack part, so as to achieve the purpose of step-by-step injection.

[0008] According to the invention, a syringe has at least the following beneficial effects: the invention performs step-by-step injections in cooperation with the sliding rack and the spring, and the injection volume of each step-by-step injection is determined according to the current pitch of the sliding rack. When a painful liquid needs to be injected, the sliding rack with a shorter pitch can be rotated to cooperate with the spring to reduce the injection volume of each step-by-step injection, thereby slowing down the injection speed. Compared with the prior art, the invention can quantify different injection speeds by using springs in cooperation with sliding racks with different pitches to adapt to the injection of different liquid medicines.

[0009] According to some embodiments of the present invention, in order to achieve the purpose of quantitative injection, the piston rod is provided with at least two sliding scales, the number of the sliding scales is consistent with the number of the sliding rack parts, the sliding scales and the sliding rack parts are arranged in a one-to-one correspondence, and the graduation value of each sliding scale corresponds to the tooth pitch of the corresponding sliding rack part.

[0010] According to some embodiments of the present invention, the relative positional relationship between each sliding scale and the corresponding sliding rack portion is consistent, so that the positional relationship between the sliding rack portion and the sliding scale is properly allocated to facilitate centralized observation of all sliding scales.

[0011] According to some embodiments of the present invention, for ease of use, all the sliding rack parts are evenly distributed circumferentially around the rotation axis of the piston rod, and a sliding scale is provided between every two adjacent sliding rack parts.

[0012] According to some embodiments of the present invention, the number of the sliding rack parts is three, that is, the present invention has three different injection speed gears.

[0013] According to some embodiments of the present invention, the housing is provided with an observation hole for observing the sliding scale, and the housing is provided with a pointer mark beside the observation hole. There is only one observation hole, and in order to enable the observation hole to observe all the sliding scales, the relative position relationship between the observation hole and the spring piece is consistent with the relative position relationship between any sliding scale and the corresponding sliding rack portion.

[0014] According to some embodiments of the invention, a clutch is movably connected in the housing, and the clutch is used to adjust the position of the spring. The spring has an injection position and a liquid collection position driven by the clutch. When the spring is in the injection position, the spring is clamped to any one of the sliding rack parts moving from bottom to top, and the spring avoids any one of the sliding rack parts moving from top to bottom. When the spring is in the liquid collection position, the spring is separated from all the sliding rack parts.

[0015] According to some embodiments of the present invention, in order to facilitate the control of the clutch, the clutch is provided with a handle, and the handle extends outside the housing.

[0016] According to some embodiments of the present invention, in order to facilitate installation and connection between the stepped injection module and the syringe, the housing is divided into a first shell and a second shell, and the first shell and the second shell are detachably connected.

[0017] According to some embodiments of the present invention, a piston handle is provided at the upper end of the piston rod, and the piston handle is located above the outer shell. The size of the piston handle is larger than the size of the piston rod, and the therapist can control the position of the piston rod through the piston handle; the lower end of the piston rod is rotatably connected to a rubber stopper, and the rubber stopper is used to seal and propel the liquid medicine in the syringe.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of a syringe according to an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 An exploded view of the syringe shown;

[0022] Figure 3 yes Figure 1 The three-dimensional structure schematic diagram of the syringe when the second shell is removed;

[0023] Figure 4 yes Figure 3 The three-dimensional structural schematic diagram of the shrapnel of the syringe shown is in the liquid collection station;

[0024] Figure 5 yes Figure 4 A front view of the syringe is shown;

[0025] Figure 6 yes Figure 3 The three-dimensional structure diagram of the shrapnel of the syringe shown is at the injection station;

[0026] Figure 7 yes Figure 6 A front view of the syringe is shown;

[0027] Figure 8 yes Figure 6The syringe is shown in a front view after switching to another injection speed gear. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the descriptions involving orientation, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0032] like Figures 1 to 3 As shown, a syringe according to an embodiment of the first aspect created by the present invention comprises a syringe 100, a piston rod 200 and a stepped injection module 300, wherein the syringe 100 is made of a transparent material, such as polypropylene, and is provided with a barrel ear 110 and an injection port 120 at its upper and lower ends respectively, wherein the injection port 120 is used to connect a needle, and a capacity scale is provided on the outer circumferential surface of the syringe 100 so as to know the capacity of the liquid medicine in the syringe 100; the piston rod 200 is movably arranged in the syringe 100, and the lower end of the piston rod 200 is rotatably connected to a rubber stopper 210 for sealing and advancing the liquid medicine in the syringe 100, and the upper end of the piston rod 200 is provided with a piston handle 220, and the size of the piston handle 220 is larger than the size of the piston rod 200, and the piston rod 200 can not only drive the rubber stopper 210 to move up and down in the syringe 100, but also rotate in the syringe 100, and the rotation axis of the piston rod 200 is located on the central axis of the syringe 100.

[0033] like Figure 2 As shown, the piston rod 200 is provided with three sliding rack parts 230, all the sliding rack parts 230 are circumferentially uniformly distributed around the rotation axis of the piston rod 200, the lower bottom surface of all teeth on each sliding rack part 230 is inclined outward from bottom to top and forms a lower avoidance surface 231, the upper top surface of all teeth on each sliding rack part 230 is horizontally arranged and forms an upper clamping surface 232, each sliding rack part 230 has a uniform tooth pitch, but the tooth pitches of different sliding rack parts 230 are different, and the three sliding rack parts 230 are arranged in sequence from short to long according to the length of their tooth pitches, and different tooth pitches correspond to different injection speed gears. It can be understood that the number of the sliding rack parts 230 can also be two, four, etc., as long as the number is greater than or equal to two, it is within the protection scope of the invention. In other embodiments, the sliding rack portion 230 may be extended in the circumferential direction to form a snap-fit ​​groove group, and the technical effect of the snap-fit ​​groove group is similar to that of the sliding rack portion 230 .

[0034] like Figure 2 and Figure 3As shown, the step-by-step injection module 300 includes a shell 310 and a spring 320. The shell 310 is divided into a first shell 301 and a second shell 302. The first shell 301 and the second shell 302 are both provided with a receiving groove 303 for accommodating the tube ear 110. At this time, the shell 310 can replace the tube ear 110, so that the step-by-step injection module 300 can be installed at the tube ear 110 of the syringe 100. In order to facilitate the installation and connection of the step-by-step injection module 300 with the syringe 100, the first shell 301 and the second shell 302 are detachably connected. The shell 310 is provided with a through hole for the piston rod 200 to pass through, so that the piston rod 200 can pass through the shell 310 up and down, and the piston handle 220 of the piston rod 200 is located above the shell 310. The spring piece 320 is arranged close to the piston rod 200, and the spring piece 320 is located above the syringe 100, one end of the spring piece 320 is fixedly connected to the shell 310, and the other end of the spring piece 320 is an overhead end 321, and the overhead end 321 can abut against any sliding rack portion 230, that is, the rotation path of any sliding rack portion 230 intersects with the overhead end 321, and the overhead end 321 is located on the up and down moving path of the corresponding sliding rack portion 230, under the action of the lower avoidance surface 231, each sliding rack portion 230 moving from top to bottom can drive the overhead end 321 to elastically avoid, and under the elastic force of the spring piece 320, the spring piece 320 will generate a certain feedback after avoiding a tooth of the sliding rack portion 230, so as to achieve the purpose of stepped injection. The invention creates a step-by-step injection by using the sliding rack part 230 in conjunction with the spring piece 320, and the injection amount of each step-by-step injection is determined according to the current tooth pitch of the sliding rack part 230. When a painful liquid needs to be injected, the step-by-step injection can be performed. Figure 7 The setting changes to Figure 8 The setting is that the sliding rack part 230 with a shorter pitch is rotated to cooperate with the spring piece 320. At this time, the syringe is in a low-speed injection gear to reduce the injection amount of each stepped injection, thereby slowing down the injection speed.

[0035] like Figure 2 and Figure 3As shown, in order to enable the invention to smoothly extract the liquid medicine without jamming, a clutch 330 is provided in the housing 310, and the clutch 330 is eccentrically connected to the housing 310, and the clutch 330 abuts against the overhead end 321 of the spring 320. When the clutch 330 is eccentrically rotated, the position of the overhead end 321 also changes accordingly, so that the spring 320 has an injection station and a liquid collection station. When the spring 320 is in the liquid collection station, the spring 320 is separated from all the sliding rack parts 230, so that the invention can smoothly extract the liquid medicine. In other embodiments, the clutch 330 can also be slidably connected to the housing 310, and at this time, the clutch 330 changes the position of the overhead end 321 of the spring 320 by sliding.

[0036] In order to conveniently control the position of the clutch 330, the clutch 330 is provided with a handle 331, and the handle 331 extends outside the housing 310. The therapist can control the position of the clutch 330 through the handle 331, so as to switch the two positions of the spring 320. In addition, when the clutch 330 is adjusting the relative position between it and the spring 320, in order to avoid the spring 320, the handle 331 is provided with a clearance groove 332 for the spring 320 to pass through, so as to prevent the clutch 330 from interfering with the spring 320.

[0037] like Figure 4 and Figure 5 As shown, when the handle 331 of the clutch 330 is rotated upward, the overhead end 321 of the spring 320 is placed outside the moving path of the sliding rack portion 230. At this time, the spring 320 is in the liquid collection position, and the upward or downward movement of the piston rod 200 in the syringe 100 is not restricted, so that the syringe can be filled with liquid; Figure 6 and Figure 7As shown in FIG. 1 , when the handle 331 of the clutch member 330 is rotated downward, the overhead end 321 of the spring piece 320 is placed on the moving path of the sliding rack portion 230. At this time, the spring piece 320 is in the injection station. Since all teeth of each sliding rack portion 230 are provided with the lower avoidance surface 231, and all teeth of each sliding rack portion 230 are provided with the upper clamping surface 232, when the piston rod 200 moves upward, the upper clamping surface 232 Under the action of the lower avoidance surface 231, the spring piece 320 can be engaged with the sliding rack part 230 moving from bottom to top, so that the upward movement of the piston rod 200 in the syringe 100 is blocked, and when the piston rod 200 moves downward, under the action of the lower avoidance surface 231, the spring piece 320 can avoid the sliding rack part 230 moving from top to bottom, so that the downward movement of the piston rod 200 in the syringe 100 is not restricted, and the injection of the syringe can be achieved. In addition, when it is necessary to rotate the piston rod 200, since the rotation of other sliding rack parts 230 may interfere with the spring piece 320, the spring piece 320 can be adjusted to the liquid collection position first, and then the other sliding rack parts 230 can be rotated to the spring piece 320.

[0038] like Figure 1 and Figure 2As shown, in some embodiments of the present invention, in order to achieve the purpose of quantitative injection, a sliding scale 240 is provided between each two adjacent sliding rack parts 230, and the number of the sliding scales 240 is consistent with the number of the sliding rack parts 230, and the sliding scales 240 and the sliding rack parts 230 are arranged one-to-one, and the graduation value of each sliding scale 240 corresponds to the tooth pitch of the corresponding sliding rack part 230, and the relative position relationship between each sliding scale 240 and the corresponding sliding rack part 230 is consistent, that is, the position angle between each sliding scale 240 and the corresponding sliding rack part 230 is consistent, so as to allocate the position relationship between the sliding rack part 230 and the sliding scales 240, so as to facilitate centralized observation of all the sliding scales 240. At the same time, the shell 310 is provided with an observation hole 311 for observing the sliding scale 240. The shell 310 is provided with a pointer mark 312 next to the observation hole 311. There is only one observation hole 311. In order to enable the observation hole 311 to observe all the sliding scales 240, the relative position relationship between the observation hole 311 and the spring piece 320 is consistent with the relative position relationship between any sliding scale 240 and the corresponding sliding rack part 230, so that when any sliding rack part 230 is rotated to cooperate with the spring piece 320, the sliding scale 240 corresponding to the sliding rack part 230 can be observed from the observation hole 311 at this time, so as to perform quantitative injection. It should be noted that the sliding scale 240 is not based on capacity, but is set according to the number of teeth in the sliding rack portion 230. For example, the number of teeth in a sliding rack portion 230 is sixty, and the number of graduation values ​​of the sliding scale 240 corresponding to the sliding rack portion 230 is also sixty. If the graduation value of the medicinal liquid in the syringe 100 is sixty, and one injection of medicinal liquid needs to be divided into three times for injection, then the injection volume each time is twenty graduation values.

[0039] It should be further explained that, for the sake of hygiene and safety, the syringe created by the present invention is a disposable syringe and reuse is strictly prohibited.

[0040] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A syringe, characterized in that: include: A syringe having an injection port at its lower end; A piston rod, which is movably arranged in the syringe, the piston rod can rotate in the syringe, and the piston rod is provided with at least two sliding rack parts, and the tooth pitches of different sliding rack parts are different; A stepped injection module comprises a shell and a spring, wherein the shell is mounted on the upper end of a syringe, the piston rod passes through the shell up and down, the spring is mounted in the shell, the rotation path of any sliding rack portion intersects with the spring, and all teeth of each sliding rack portion are provided with a lower avoidance surface inclined from bottom to top and outward, so that each sliding rack portion moving from top to bottom can drive the spring to perform elastic avoidance.

2. A syringe according to claim 1, characterized in that: The piston rod is provided with at least two sliding scales, the number of the sliding scales is consistent with the number of the sliding rack parts, the sliding scales and the sliding rack parts are arranged in a one-to-one correspondence, and the graduation value of each sliding scale corresponds to the tooth pitch of the corresponding sliding rack part.

3. A syringe according to claim 2, characterized in that: The relative position relationship between each sliding scale and the corresponding sliding rack portion is consistent.

4. A syringe according to claim 3, characterized in that: All the sliding rack parts are evenly distributed circumferentially around the rotation axis of the piston rod, and a sliding scale is provided between every two adjacent sliding rack parts.

5. A syringe according to claim 4, characterized in that: The number of the sliding rack parts is three.

6. A syringe according to claim 3, characterized in that: The shell is provided with an observation hole for observing the sliding scale, and the shell is provided with a pointer mark beside the observation hole.

7. A syringe according to claim 1, characterized in that: A clutch is movably connected inside the shell, and the clutch is used to adjust the position of the spring.

8. A syringe according to claim 7, characterized in that: The clutch member is provided with a handle, and the handle extends out of the housing.

9. A syringe according to claim 1, characterized in that: The housing is divided into a first shell and a second shell, and the first shell is detachably connected to the second shell.

10. A syringe according to claim 1, characterized in that: The upper end of the piston rod is provided with a piston handle, and the piston handle is located above the shell; the lower end of the piston rod is rotatably connected with a rubber plug.

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