Sample adding gun with equivalent output function

Abstract

According to the sampling gun with the equivalent output function, the driven rod and the driving rod are arranged, the driving rod is pushed, the driven rod on the other side of the lever is pushed, then the piston of the needle tube is pushed, the baffle limits the pushing distance of the driving rod to meet the quantitative requirement, the limiting plate is opened and closed through the embedded plate to adjust the position of the baffle, and the preset quantitative change is achieved; the pressing strip fixed on the fixing sleeve tightly presses the needle tube, and the multiple layers of telescopic plates fixedly connected with the pressing strip can play a role in fixing in the sliding direction of the needle tube; by the adoption of the technical scheme, quantitative sample adding and quantitative preset value changing are achieved through a simple structure, the cost is effectively reduced, meanwhile, the scene applicability of the device is effectively improved, needle tubes of different models are adapted, the cleaning process is replaced with consumables, and the use sanitation degree and operation convenience are effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of sample adding technology equipment, in particular to a sample adding gun with an equal amount output function. Background Art

[0002] Equal volume dosing guns are widely used in hospitals. They are often used in hospital laboratories and pharmacies for drug distribution, laboratory reagent distribution, and liquid sampling, making it easier for medical staff to grasp the accuracy of drug dosage.

[0003] Currently, the commonly used isobaric dosing guns can achieve the requirement of isobaric dosing relatively accurately. This is mainly achieved by using a gear or rack in conjunction with a pawl. Each time the gear or rack is pressed, it moves a certain distance to achieve isobaric dosing. However, unlike dosing tubes or syringes, isobaric dosing guns are consumables. Different dosages are required in different usage scenarios. The isobaric dosing gun delivers the same dosage each time it is pressed. In scenarios where a larger dosage is required, the dosing gun with a smaller output requires multiple presses, which is inefficient. In scenarios where a smaller dosage is required, the isobaric dosing gun may exceed the dosage requirement in a single press.

[0004] The invention patent with application number CN202210184866.7 discloses an injection device with flexible dose selection, including a dose selector, in which the limited set of predetermined fixed doses includes a minimum fixed dose and one or more higher fixed doses, and at least one of the one or more higher fixed doses is equal to the minimum fixed dose plus a fraction of the minimum fixed dose. To a certain extent, it solves the problem of selecting a fixed dose for each addition while adding equal amounts, but its structure is complex and costly, and its applicable scenario is only in scenarios where laboratory dose requirements are extremely precise. It is difficult to apply in scenarios such as pharmacy drug distribution. In addition, it cannot be adapted to disposable needles and syringes and needs to be cleaned before each use. Utility Model Content

[0005] The purpose of the present invention is to address the deficiencies in the above-mentioned technology and to propose a dosing gun with equal output function, aiming to solve the problems of the above-mentioned preset fixed-dose dosing structure being complex, costly and having a single applicable scenario.

[0006] The utility model provides a sample-adding gun with an equal output function, comprising a housing, a lever, and a support rod, wherein one end of the support rod is fixedly connected to the inner wall of the housing, one side of the support rod is hinged to the middle of the lever, one end of the lever is slidably connected to a driven rod, and the other end of the lever is hinged to a quantitative mechanism for pushing the driven rod so that the driven rod pushes a needle tube for quantitative sample addition, a limiting mechanism for changing a preset quantitative value is slidably connected to the outside of the housing, the limiting mechanism and the quantitative mechanism are movably connected, and a clamping mechanism for clamping the needle tube is provided at one end of the housing in the pushing direction of the driven rod to accommodate different types of needle tubes. By providing the quantitative mechanism, the driven rod on the other side of the lever is driven toward the needle tube, effectively achieving quantitative sample addition, and at the same time, by providing the limiting mechanism to change the preset quantitative value, the use scenarios of the sample-adding device are effectively diversified, and the clamping mechanism can clamp various types of sample-adding needle tubes.

[0007] Preferably, the quantitative mechanism includes an active rod, a rectangular hole, a sliding rod, a first spring, a first telescopic rod and a stopper. The rectangular holes are opened at both ends of the lever, the sliding rod is fixedly connected to one end of the active rod and the driven rod, and the sliding rod is slidably sleeved in the rectangular hole, the end of the active rod opposite to the pushing direction of the driven rod is fixedly connected to the first spring, the other end of the first spring is fixedly connected to the stopper, the first telescopic rod is sleeved in the first spring, and the two ends of the first telescopic rod are respectively fixedly connected to the active rod and the stopper.

[0008] Preferably, the limiting mechanism includes a limiting plate, a limiting groove, a slider, a slide, a second spring, and a second telescopic rod. The limiting groove is provided on one side of the limiting plate, and limiting plates are provided on both sides of the stopper, and the stopper is nested in the limiting grooves of the two limiting plates. The limiting plate is fixedly connected to the slider, and the slider is slidably connected in the slide. The two ends of the second telescopic rod are respectively fixed to the side of the limiting groove provided in the two limiting plates. The second spring is sleeved outside the second telescopic rod, and the two ends of the spring are respectively fixed to the two limiting plates. The outer wall of the housing is slidably and elastically connected with an inlay plate, which is movably embedded in the two corresponding limiting grooves to expand and contract the distance between the two limiting plates. By providing the limiting groove, the stopper is fixed by the limiting groove, and the distance from the active rod to the stopper is the set quantity. By separating and closing the fiberboard with the inlay plate, the position of the stopper can be adjusted to adjust the preset quantity, thereby effectively increasing the diversity of usage scenarios.

[0009] Preferably, the compression mechanism includes a side strip, a fixed sleeve, a pressure strip, a multi-layer telescopic plate, and a third spring. The side strip is fixedly connected to the inner wall of the housing, the two fixed sleeves are respectively fixedly connected to the ends of the pressure strip, the ends of the pressure strip are respectively fixedly connected to the sides of the two fixed sleeves away from the side strip, one end of the multi-layer telescopic plate is fixedly connected to the side strip, and the other end of the multi-layer telescopic plate is fixedly connected to the pressure strip. The third spring is sleeved within the multi-layer telescopic plate. The pressure strip is embedded with reinforcing ribs. By providing the fixed sleeve and the multi-layer telescopic plate, the sliding direction of the needle tube is fixed and needle tubes of different thicknesses can be compressed, effectively adapting to needle tubes of different specifications and reducing cleaning time.

[0010] Preferably, the active rod is fixedly connected to a pressure plate at one end away from the stopper, and the pressure plate is located outside the housing. Two limiting rings are fixedly connected to the inner wall of the housing, and the driven rod and the active rod are respectively slidably sleeved in one of the limiting rings.

[0011] Compared with the existing technology, it has the following beneficial effects:

[0012] The utility model provides a sample adding gun with equal output function. Through the follower rod and the active rod, the active rod is pushed, and the follower rod on the other side of the lever is pushed, thereby pushing the needle piston. The baffle limits the pushing distance of the active rod to achieve the quantitative requirement. The inlay plate opens and closes the limit plate to adjust the position of the baffle to achieve the change of the preset quantitative amount. The pressure strip fixed on the fixed sleeve presses the needle tube, and the multi-layer telescopic plate fixedly connected to the pressure strip can play a fixing role in the sliding direction of the needle tube. By adopting the above technical solution, a simple structure is used to achieve quantitative adding and change the quantitative preset value, which effectively reduces the cost while effectively improving the scene applicability of the device, adapting to different models of needle tubes, and using consumables to replace the cleaning process, effectively improving the hygiene level of use and the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 This is a schematic diagram of a sample adding gun with equal output function according to the present invention;

[0015] Figure 2 This is a side view of the internal structure of a sample adding gun with equal output function according to the present invention;

[0016] Figure 3 This is a partial enlarged schematic diagram of A of the present utility model;

[0017] Figure 4This is a schematic diagram of the limiting mechanism of the utility model;

[0018] Figure 5 This is an exploded view of the limiting mechanism of the utility model;

[0019] Figure 6 This is a schematic diagram of the compacting mechanism of the utility model;

[0020] Figure 7 This is a schematic diagram of the internal structure of the compacting mechanism of the utility model;

[0021] Figure 8 Schematic diagram of the gear of the present invention.

[0022] In the figure, the housing 1; the support rod 11; the lever 21; the driven rod 22; the metering mechanism 3; the active rod 31; the rectangular hole 32; the sliding rod 33; the first spring 34; the first telescopic rod 35; the block 36; the limiting mechanism 4; the limiting plate 41; the limiting groove 42; the slider 43; the slide groove 44; the second spring 45; the second telescopic rod 46; the panel 47; the clamping mechanism 5; the edge strip 51; the fixing sleeve 52; the pressure strip 53; the reinforcing rib 531; the multi-layer telescopic plate 54; the third spring 55; the pressure plate 6; and the limiting ring 7. DETAILED DESCRIPTION

[0023] In order to make it easier to understand the structure of the present invention and the functional features and advantages that can be achieved, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings:

[0024] Example:

[0025] like Figures 1 to 7 As shown, the utility model provides a sample adding gun with equal output function, including a shell 1, a lever 21 and a support rod 11, one end of the support rod 11 is fixedly connected to the inner wall of the shell 1, one side of the support rod 11 is hinged to the middle part of the lever 21, one end of the lever 21 is slidably connected to a driven rod 22, and the other end of the lever 21 is hinged to a quantitative mechanism 3 for pushing the driven rod 22 so that the driven rod 22 pushes the needle tube for quantitative addition. The quantitative mechanism 3 includes an active rod 31, a rectangular hole 32, a sliding rod 33, a first spring 34, a first telescopic rod 35 and a stopper 36. The rectangular hole 32 is opened at both ends of the lever 21, the sliding rod 33 is fixedly connected to the active rod 31 and one end of the driven rod 22, and the sliding rod 33 is slidably sleeved in the rectangular hole 32, the active rod 31 is fixedly connected to the first spring 34 at one end opposite to the pushing direction of the driven rod 22, and the other end of the first spring 34 is fixedly connected to the stopper 36, the first telescopic rod 35 is sleeved in the first spring 34, and the two ends of the first telescopic rod 35 are respectively fixedly connected to the active rod 31 and the stopper 36.

[0026] The muzzle of the housing 1 is provided with a needle. When the active rod 31 is pushed, the driven rod 22 moves toward the side of the needle piston, pushing the needle piston to add the sample. In order to reduce the torsion of the lever 21 when the active rod 31 is pushed and the deviation of the driven rod 22 caused by the insufficient length of the lever 21, a rectangular hole 32 is provided on the active rod 31 and the driven rod 22. The sliding rod 33 on the active rod 31 and the driven rod 22 slides in the rectangular hole 32. The sliding rod 33 is a nail-shaped round rod with an end diameter larger than the rod diameter. The rod slides in the rectangular hole 32, and the end restricts the rod from sliding out of the rectangular hole 32. When the active rod 31 is pushed, the active rod 31 compresses the first telescopic rod 35 and the first spring 34 until they abut against the baffle, completing a quantitative addition. When the active rod 31 is released, the active rod 31 is rebounded to its original position by the first spring 34. The baffle is fixed to the inner wall of the shell 1 , but since the present solution is provided with a limiting mechanism 4 for adjusting the quantitative preset value, the baffle passes through the shell 1 and is fixed by the limiting mechanism 4 .

[0027] The active rod 31 is fixedly connected to a pressure plate 6 at the end away from the stopper 36, and the pressure plate 6 is located outside the housing 1. The pressure plate 6 is more suitable for pressing the active rod 31 by hand. Two limiting rings 7 are fixedly connected to the inner wall of the housing 1, and the driven rod 22 and the active rod 31 are respectively slidably mounted in one of the limiting rings 7. The limiting ring 7 serves to stabilize the pushing process of the active rod 31 and the driven rod 22. In order to increase the contact area between the driven rod 22 and the needle piston part and make the pushing more stable, a circular plate with a diameter larger than that of the driven rod 22 can be fixed to the end of the driven rod 22.

[0028] As another example, Figure 4 and Figure 5 As shown, the housing 1 described in the present application is externally slidably connected to a limiting mechanism 4 for changing the preset quantitative amount. The limiting mechanism 4 includes a limiting plate 41, a limiting groove 42, a slider 43, a chute 44, a second spring 45, and a second telescopic rod 46. The limiting groove 42 is provided on one side of the limiting plate 41. The limiting plates 41 are provided on both sides of the stopper 36, and the stopper 36 is nested in the limiting grooves 42 of the two limiting plates 41. The stopper can be fixed by the limiting grooves 42. The farther the stopper is from the housing 1, the longer the displacement distance of the active rod 31, and the greater the amount of quantitative sample added each time. The limiting plate 41 is fixedly connected to the slider 43, and the slider 43 is slidably connected in the chute 44. The stopper 36 can be moved by expanding the limiting plate 41. The two ends of the second telescopic rod 46 are respectively fixed to one side of the two limit plates 41 where the limit slots 42 are provided. The second spring 45 is sleeved outside the second telescopic rod 46, and the two ends of the second spring 45 are respectively fixedly connected to the two limit plates 41. When the limit plates 41 are stretched, the position of the stopper 36 is moved. After the position of the stopper 36 is determined, the stopper is released, and the second spring 45 pulls the limit plate 41 to return to its original position.

[0029] A panel 47 is slidably and elastically connected to the outer wall of the housing 1. Panel 47 is movably embedded in two corresponding limit slots 42, used to expand and contract the distance between the two limit plates 41. Pressing down on panel 47 pushes the limit plates 41 apart. Panel 47 is curved on the side closest to the limit plates 41, and a protrusion is fixedly provided on the side away from the housing 1 to facilitate manual pressing. Panel 47 slides on the housing 1 via the slide slot. A further optimization is to install a spring within the slide slot of panel 47 to ensure that panel 47 is promptly reset after the stop block 36 has completed its movement.

[0030] As another example, Figure 2 、 Figure 6 and Figure 7 As shown, a clamping mechanism 5 for clamping the needle tube is provided at one end of the housing 1 in the pushing direction of the driven rod 22 in the present application to accommodate different types of needle tubes. The clamping mechanism 5 includes a side strip 51, a fixing sleeve 52, a pressure strip 53, a multi-layer telescopic plate 54, and a third spring 55. The side strip 51 is fixedly connected to the inner wall of the housing 1. The housing 1 located above is provided with an opening and closing plate, which is hinged to the housing 1. When the opening and closing plate is opened, the needle tube is placed in the housing 1. The needle tube is clamped by the upper and lower clamping mechanisms 5. The opening and closing plate and the housing 1 are interferingly fitted or a locking structure is provided on one side of the opening and closing plate to fix the opening and closing plate. The upper clamping mechanism 5 is fixed to the opening and closing plate.

[0031] The two fixing sleeves 52 are fixedly connected to the ends of the pressure strip 53, and the ends of the pressure strip 53 are fixedly connected to the sides of the two fixing sleeves 52 away from the edge strip 51. One end of the multi-layer telescopic plate 54 is fixedly connected to the edge strip 51, and the other end of the multi-layer telescopic plate 54 is fixedly connected to the pressure strip 53. The third spring 55 is sleeved within the multi-layer telescopic plate 54. The fixing sleeve 52 remains stable when the needle tube pushes against the pressure strip 53, always maintaining pressure on the needle tube. The multi-layer telescopic plate 54 and the third spring 55 contract when squeezed by the needle tube. The multi-layer telescopic plate 54 and the fixing sleeve 52 prevent the needle tube from sliding. In order to increase friction with the needle tube, the pressure strip 53 is made of rubber.

[0032] A reinforcing rib 531 is embedded in the pressure strip 53 . The reinforcing rib 531 is made of metal, so that the pressure strip 53 applies greater pressure to the needle tube, pressing the needle tube tightly, thereby reducing the probability of the needle tube sliding in the housing 1 .

[0033] As another example, Figure 8 As shown, the lever 21 of the present application can be replaced by a gear, and the active rod 31 and the driven rod 22 can be replaced by racks. When the active rod 31 is pushed, the gear rotates in the opposite direction, causing the driven rod 22 to move in the opposite direction of the active rod 31.

[0034] The working principle of the equal output function sample gun of the present application is as follows: when in use, the opening and closing plate on the shell 1 is opened to place the needle tube in the shell 1. The upper and lower pressure strips 53 are squeezed to press the needle tube tightly. The fixed sleeve 52 and the multi-layer telescopic plate 54 limit the sliding of the piston part of the needle tube when it is pushed. Push down the panel 47 to open the limit plate 41, pull the stopper 36, and place it in the appropriate limit groove 42. After releasing the panel 47, the panel 47 rebounds, the limit plate 41 resets, and the stopper 36 is fixed. Press the pressure plate 6 to push the active rod 31. The driven rod 22 moves in the opposite direction to the active rod 31. The driven rod 22 pushes the piston of the needle tube to squeeze out the liquid in the needle tube for sample addition. The distance from the active rod 31 to the stopper is the distance the needle tube piston moves forward when the pressure plate 6 is pressed once, which is the quantitative sample addition. When dispensing or adding more doses is needed, the panel 47 is pushed down, opening the limit plate 41, and the stopper 36 is pulled into the limit slot 42 further away from the housing 1. The panel 47 is then released to allow for further addition, thus changing the preset fixed dose value. Similarly, to decrease the preset value, the stopper 36 is moved closer to the housing 1. This design effectively adapts to different application scenarios.

[0035] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any person skilled in the art can utilize the above technical content to make many possible changes and modifications to the present invention without departing from the scope of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any changes, modifications, equivalent changes, and modifications made to the above embodiments based on the technology of the present invention that do not depart from the content of the present invention are within the scope of protection of the present invention.

Claims

1. A sample gun with equal output function, characterized in that , comprising a shell (1), a lever (21) and a support rod (11), one end of the support rod (11) is fixedly connected to the inner wall of the shell (1), one side of the support rod (11) is hinged to the middle part of the lever (21), one end of the lever (21) is slidably connected to a driven rod (22), the other end of the lever (21) is hinged to a quantitative mechanism (3) for pushing the driven rod (22) so that the driven rod (22) pushes the needle tube for quantitative addition, the shell (1) is slidably connected to a limit mechanism (4) for changing a preset quantitative amount, the limit mechanism (4) and the quantitative mechanism (3) are movably connected, and a clamping mechanism (5) for clamping the needle tube is provided at one end of the shell (1) in the pushing direction of the driven rod (22) to adapt to needle tubes of different models.

2. The equal output function sample adding gun according to claim 1, characterized in that: The quantitative mechanism (3) comprises an active rod (31), a rectangular hole (32), a sliding rod (33), a first spring (34), a first telescopic rod (35) and a stopper (36); the rectangular hole (32) is formed at both ends of the lever (21); the sliding rod (33) is fixedly connected to one end of the active rod (31) and the driven rod (22); and the sliding rod (33) is slidably sleeved in the rectangular hole (32); the active rod (31) is fixedly connected to the first spring (34) at one end opposite to the pushing direction of the driven rod (22); the other end of the first spring (34) is fixedly connected to the stopper (36); the first telescopic rod (35) is sleeved in the first spring (34); and the two ends of the first telescopic rod (35) are respectively fixedly connected to the active rod (31) and the stopper (36).

3. The equal output function sample adding gun according to claim 2, characterized in that: The limiting mechanism (4) comprises a limiting plate (41), a limiting groove (42), a slider (43), a sliding groove (44), a second spring (45) and a second telescopic rod (46); the limiting groove (42) is provided on one side of the limiting plate (41); limiting plates (41) are provided on both sides of the stopper (36); and the stopper (36) is nested in the limiting grooves (42) of the two limiting plates (41); the limiting plate (41) is fixedly connected to the slider (43); the slider (43) is slidably connected in the sliding groove (44); two ends of the second telescopic rod (46) are respectively fixed to one side of the two limiting plates (41) where the limiting grooves (42) are provided; the second spring (45) is sleeved outside the second telescopic rod (46); and two ends of the spring are respectively fixedly connected to the two limiting plates (41).

4. The equal output function sample adding gun according to claim 3, characterized in that: The outer wall of the housing (1) is slidably and elastically connected with an insert plate (47), and the insert plate (47) is movably embedded in two corresponding limiting grooves (42) to expand and reduce the distance between the two limiting plates (41).

5. The equal output function sample adding gun according to claim 4, characterized in that: The clamping mechanism (5) comprises a side strip (51), a fixing sleeve (52), a pressure strip (53), a multi-layer telescopic plate (54) and a third spring (55); the side strip (51) is fixedly connected to the inner wall of the shell (1); the two fixing sleeves (52) are respectively fixedly connected to the two ends of the pressure strip (53); the two ends of the pressure strip (53) are respectively fixedly connected to the side of the two fixing sleeves (52) away from the side strip (51); one end of the multi-layer telescopic plate (54) is fixedly connected to the side strip (51); the other end of the multi-layer telescopic plate (54) is fixedly connected to the pressure strip (53); and the third spring (55) is sleeved in the multi-layer telescopic plate (54).

6. The equal output function sample adding gun according to claim 5, characterized in that: The pressure strip (53) is embedded with a reinforcing rib (531).

7. The equal output function sample adding gun according to claim 2, characterized in that: The active rod (31) is fixedly connected to a pressure plate (6) at one end away from the stopper (36), and the pressure plate (6) is located outside the housing (1).

8. The equal output function sample adding gun according to claim 7, characterized in that: Two limiting rings (7) are fixedly connected to the inner wall of the housing (1), and the driven rod (22) and the active rod (31) are respectively slidably sleeved in one of the limiting rings (7).

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