High-precision adjustable pressing type batcher
By designing a high-precision adjustable press-type metering device, the problems of accuracy, sealing and operation complexity of traditional metering devices are solved, realizing high-precision and well-sealed quantitative operation, and improving experimental efficiency and result accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-04-03
AI Technical Summary
Existing glass dispensing instruments are inadequate in terms of accuracy, sealing, and durability, which makes them prone to errors and leaks during the dispensing process, and they are complex and inefficient to operate.
A high-precision adjustable press-type metering device was designed, which includes a liquid inlet/outlet mechanism, a counting mechanism, and a metering mechanism. It adopts a press-type liquid dispensing method and realizes visual volume adjustment through an observation window and a mechanical counting component. It has a simple structure and is easy to carry and move.
It improves the accuracy and sealing of quantitative measurements, simplifies the operation process, increases efficiency, and ensures the accuracy of experimental results.
Smart Images
Figure CN121783299A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of laboratory instrument and reagent production technology, and in particular to a high-precision adjustable press-type metering device. Background Technology
[0002] In the production of diagnostic reagents, the experimental stage requires the precise transfer and distribution of liquids in small volumes using a metering device. For example, adding very expensive or critical biological or chemical components that affect the reaction performance to the reaction system. These components are usually small in volume, but have a huge impact on the sensitivity and specificity of the final product, and must be extremely precise.
[0003] However, existing glass dispensing instruments have shortcomings in terms of accuracy, sealing, and durability, leading to errors and leaks during the dispensing process and affecting the accuracy of experimental results. Furthermore, traditional dispensing instruments require manual lifting and pressing of the plunger, a complex and inefficient process. Therefore, there is a need to develop a dispensing instrument that is highly accurate, has good sealing, and is easy to operate. Summary of the Invention
[0004] The purpose of this application is to provide a high-precision adjustable press-type metering device to solve the problems of poor metering accuracy, complicated and cumbersome operation, and low efficiency of traditional metering devices or dispensers.
[0005] To address the aforementioned technical problems, this application provides a high-precision adjustable push-button type dispensing device, comprising: Liquid inlet / outlet mechanism, counting mechanism, and metering mechanism; The liquid inlet / outlet mechanism includes a three-way assembly screwed onto a bottle cap. A liquid inlet connector is threaded to the lower end of the three-way assembly. The bottle cap is screwed onto the bottle. A limiting rib is provided on the inner side of the handle. A liquid inlet straw located inside the bottle is connected to the lower end of the liquid inlet connector. From bottom to top, a liquid inlet sealing ring, a liquid inlet check ball, and a liquid inlet spring are sequentially installed inside the liquid inlet connector. The three-way assembly is installed at the upper end of the liquid inlet connector. A handle is fixed to the outer periphery of the three-way assembly. A connection to the three-way assembly is screwed onto one side of the handle. An extended connector is provided, the outer end of which is connected to a liquid outlet connector via a right-angle connector. Inside the liquid outlet connector, from bottom to top, are sequentially installed a liquid outlet sealing ring, a liquid outlet check ball, and a liquid outlet spring. An arc-shaped liquid outlet tube is provided on the liquid outlet connector. A right-angle outer shell cover and a right-angle outer shell cover are also snapped onto the outer side of the handle. A retaining ring is snapped onto the upper end of the right-angle outer shell cover. The right-angle connector and the liquid outlet connector are located within the space formed by the right-angle outer shell cover, the retaining ring, and the right-angle outer shell cover. The counting mechanism includes a central ring and an upper outer shell assembled to the upper end of the handle via a lower locking nut. A counter adjustment shaft is rotatably mounted on the top of the upper outer shell. A fine-tuning knob located on the top of the upper outer shell is fixed to the upper end of the counter adjustment shaft. A fine-tuning spring is sleeved on the upper part of the counter adjustment shaft. The fine-tuning spring is located between the upper boss of the counter adjustment shaft and the top side of the upper outer shell. A counter assembly is fixed to the outer periphery of the counter adjustment shaft. An observation window communicating with the upper outer shell is provided on the counter assembly. A pressing connecting rod extending through the counter adjustment shaft to the upper side of the fine-tuning knob and the quantitative mechanism is passed through the counter adjustment shaft. A pressing button is fixed to the upper end of the pressing connecting rod. The quantitative mechanism includes a positioning adjusting screw connected to the lower end of the counter adjusting shaft and a piston cylinder connected to the upper end of the three-way assembly. A piston rod is installed inside the piston cylinder. A positioning adjusting nut is threadedly connected to the upper part of the positioning adjusting screw. Limiting grooves are provided at both ends of the positioning adjusting nut. The limiting rib is located in the limiting groove. A piston spring is fitted on both the positioning adjusting screw and the piston cylinder, located between the positioning adjusting nut and the upper end of the three-way assembly. The radius of the upper end face of the piston rod is larger than the radius of the piston spring. The lower end of the pressing connecting rod is threaded and threadedly connected to the lower part of the piston rod.
[0006] In a preferred embodiment, a high-precision adjustable press-type metering device is provided, wherein the three-way assembly includes a three-way fixing head threadedly connected to the upper end of the liquid inlet connector and a three-way threadedly connected to the three-way fixing head, the three-way fixing head is threadedly connected to the bottle cap, a three-way liner is provided inside the three-way, the lower end of the piston cylinder is engaged between the three-way liner and the three-way, and the handle is engaged at the three-way fixing head.
[0007] As a preferred embodiment, a high-precision adjustable push-button type meter, wherein the counter assembly includes, from top to bottom, a counter cover, a transparent counter shell, an upper baffle, and a lower fixing cover, wherein the lower fixing cover is fitted onto the middle ring; Multiple digital discs are provided on the outer periphery of the counter adjustment shaft, and the inner side of the uppermost digital disc is provided with double protrusions that cooperate with the double groove sleeves on the counter adjustment shaft for installation. A counter mounting rod is fixed between the bottom of the counter cover and the counter housing, and a tooth matching the digital disc is fixed on the counter mounting rod.
[0008] The solution requires further detailed explanation of a high-precision adjustable push-button metering device, wherein a connector connecting lock nut is provided between the extended connector and the right-angle connector, and an outlet fixing lock nut is provided on the connector connecting lock nut. The connector connecting lock nut and the outlet fixing lock nut are located in the space formed by the right-angle shell, the fixing ring and the right-angle shell cover.
[0009] Compared with existing technologies, the high-precision adjustable push-button dispensing meter provided by this invention includes a liquid inlet / outlet mechanism, a counting mechanism, and a dispensing mechanism. The counting mechanism and the dispensing mechanism are connected vertically. The liquid outlet and liquid inlet of the liquid inlet / outlet mechanism are located on the side and below the dispensing mechanism, respectively. Visualization is achieved through an observation window and mechanical counting components, displaying the set capacity and adjustment target. This meter uses a push-button dispensing method, resulting in high dispensing accuracy. It has a simple structure and is easy to carry, disassemble, and move. The right-angle outer cover and right-angle outer shell protect the right-angle connector and the liquid outlet. Attached Figure Description
[0010] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.
[0011] Figure 1 A schematic diagram of a planar structure of a high-precision adjustable press-type metering device provided by the present invention; Figure 2 A schematic diagram of another high-precision adjustable press-type metering device provided by the present invention; Figure 3 This is a cross-sectional view of a high-precision adjustable press-type metering device provided by the present invention; Figure 4 This is a schematic diagram of the connection structure between a counter assembly, a counter adjustment shaft, and a position adjustment screw provided by the present invention; Figure 5 A schematic diagram of the connection structure of a counter adjustment shaft, a position adjustment screw, and a position adjustment nut provided by the present invention; Figure 6 This is a schematic diagram of the connection structure between the counter adjustment shaft and the position adjustment screw provided by the present invention; Figure 7 This is a schematic diagram of a counter adjustment shaft structure provided by the present invention; Figure 8 This is a schematic diagram of a handle structure provided by the present invention; In the diagram: 1. Bottle; 2. Bottle cap; 3. Piston spring; 4. Discharge check ball; 5. Discharge spring; 6. Discharge port sealing ring; 7. Press connecting rod; 8. Position adjusting screw; 90. Counter cover; 91. Counter housing; 92. Digital dial; 93. Counter mounting rod; 94. Pulley; 10. Inlet straw; 11. Position adjusting nut; 12. Handle; 120. Square hole; 13. T-joint; 14. Upper housing; 15. Lower locking nut; 16. Upper baffle; 17. Lower fixing cover; 18. Middle ring; 19. Inlet check ball; 20. Inlet spring; 21. Inlet connector; 22. Inlet sealing ring; 23. Press button; 24. Counter adjusting shaft; 25. Fine-tuning knob; 26. Fine-tuning spring; 27. Piston rod; 28. Outlet connector; 29. Outlet fixing nut; 30. T-joint fixing head; 31. T-joint liner; 32. Extension connector; 33. Connector locking nut; 34. Right-angle connector; 35. Arc-shaped outlet pipe; 36. Fixing ring; 37. Right-angle outer shell; 38. Right-angle outer shell cover; 39. Piston cylinder; 40. Limiting rib; 41. Observation window; 42. Limiting groove. Detailed Implementation
[0012] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.
[0013] The core of this application is to provide a high-precision adjustable press-type metering device, which solves the problems of poor metering accuracy, complicated and cumbersome operation, and low efficiency of traditional metering devices or dispensing devices.
[0014] Figure 1 This is a schematic diagram of the planar structure of a high-precision adjustable press-type metering device provided by the present invention. Figure 2 This is a schematic diagram of another high-precision adjustable press-type metering device provided by the present invention. Figure 3 This is a cross-sectional view of a high-precision adjustable press-type metering device provided by the present invention. Figure 4 This is a schematic diagram of the connection structure between a counter assembly, a counter adjustment shaft, and a position adjustment screw provided by the present invention. Figure 5 This is a schematic diagram of the connection structure of a counter adjusting shaft, a position adjusting screw, and a position adjusting nut provided by the present invention. Figure 6 This is a schematic diagram of the connection structure between the counter adjustment shaft and the position adjustment screw provided by the present invention. Figure 7 This is a schematic diagram of a counter adjustment shaft structure provided by the present invention. Figure 8 See the schematic diagram of a handle structure provided by the present invention. Figures 1 to 8 As shown.
[0015] Example 1 A high-precision adjustable push-button metering device includes a liquid inlet / outlet mechanism, a counting mechanism, and a metering mechanism; The liquid inlet / outlet mechanism includes a three-way assembly screwed onto the bottle cap 2. The lower end of the three-way assembly is threadedly connected to a liquid inlet connector 21. The bottle cap 2 is screwed onto the bottle 1, and the lower end of the bottle cap 2 is threadedly connected to the external thread of the three-way assembly. The bottle cap 2 can be connected to different bottles 1 according to its own size. The bottle cap 2 has an air hole to balance atmospheric pressure. A limiting rib 40 is provided on the inner side of the handle 12. The lower end of the liquid inlet connector 21 is connected to a liquid inlet straw 10 located inside the bottle 1. The liquid inlet connector 21 is equipped with a liquid inlet sealing ring 22, a liquid inlet check ball 19, and a liquid inlet spring 20 from bottom to top. That is, the liquid inlet connector 21 is pagoda-shaped and has an internal hole to accommodate the liquid inlet sealing ring 22, the liquid inlet spring 20, and the liquid inlet check ball 19. The liquid inlet sealing ring 22 is pressed into the bottom of the liquid inlet connector 21, and the liquid inlet check ball 19 and the liquid inlet sealing ring 22 cooperate to fit the inner ring of the liquid inlet sealing ring 22. A three-way assembly is installed at the upper end of the inlet connector 21. The upper end of the inlet spring 20 is inserted into the small hole at the bottom of the three-way assembly, and the lower end of the inlet spring 20 contacts the inlet check ball 19. The pagoda connector of the inlet connector 21 and the inlet suction tube 10 are press-fitted to form a sealed pipe. A handle 12 is fixed to the outer periphery of the three-way assembly. An extension connector 32 connected to the three-way assembly is screwed onto one side of the handle 12. The outer end of the extension connector 32 is connected to the outlet connector 28 through a right-angle connector 34. The outlet connector 28 is installed from bottom to top with an outlet sealing ring 6, an outlet check ball 4, and an outlet spring 5. That is, the outlet connector 28 is pagoda-shaped and has an internal hole to accommodate the outlet sealing ring 6, the outlet check ball 4, and the outlet spring 5. An arc-shaped outlet tube 35 is provided on the outlet connector 28. Specifically, the upper end of the dispensing spring 5 is inserted into the small hole on the dispensing connector 28, and the lower end of the dispensing spring 5 contacts the dispensing check ball 4. The dispensing port sealing ring 6 is inserted into the groove at the port of the dispensing connector 28, so that the dispensing spring 5 is in a compressed state. The end face of the dispensing port sealing ring 6 is flush with the end face of the dispensing connector 28. The external thread of the dispensing connector 28 is threadedly connected to the threaded hole of the right-angle connector 34. The pagoda connector of the dispensing connector 28 and the arc-shaped dispensing pipe 35 are interference-fitted to form a sealed pipe. In order to improve the aesthetics and protect the right-angle connector 34 and the dispensing connector, a right-angle outer shell cover 38 and a right-angle outer shell 37 are also attached to the outside of the handle 12. A retaining ring 36 is attached to the upper end of the right-angle outer shell 37. The right-angle connector 34 and the dispensing connector 28 are located in the space formed by the right-angle outer shell 37, the retaining ring 36 and the right-angle outer shell cover 38.
[0016] The counting mechanism includes a central ring 18 and an upper housing 14, which are mounted on the upper end of the handle 12 via a lower locking nut 15. The handle 12 and the upper housing 14 are fixed by the lower locking nut 15. A counter adjustment shaft 24 is rotatably mounted on the top of the upper housing 14. A fine adjustment knob 25 is fixed to the upper end of the counter adjustment shaft 24. A fine adjustment spring 26 is fitted on the upper part of the counter adjustment shaft 24. The fine adjustment spring 26 is located between the upper boss of the counter adjustment shaft 24 and the top side of the upper housing 14. The counter adjustment shaft 24 serves as the lower limit of the fine adjustment spring 26, and the upper housing 14 serves as the upper limit of the fine adjustment spring 26. When the counter adjustment shaft 24 is pulled up, the fine adjustment spring 26 is compressed. After the counter adjustment shaft 24 is released, the fine adjustment spring 26 rebounds, causing the counter adjustment shaft 24 to reset. A counter assembly is fixed to the outer periphery of the counter adjustment shaft 24. The counter assembly has an observation window 41 that communicates with the upper housing 14. A pressing connecting rod 7 extends through the counter adjustment shaft 24, reaching the upper side of the fine-tuning knob 25 and the metering mechanism. A pressing button 23 is fixed to the upper end of the pressing connecting rod 7. The small teeth on the outer ring of the fine-tuning knob 25 are designed to prevent slippage during adjustment. The four bosses at the lower end of the counter adjustment shaft 24 serve to connect with the metering structure components.
[0017] The metering mechanism includes a position adjusting screw 8 connected to the lower end of the counter adjusting shaft 24 and a piston cylinder 39 connected to the upper end of the three-way assembly. The piston cylinder 39 and the three-way assembly are pressed and sealed. The position adjusting screw 8 passes through the middle ring 18 and engages with the bottom of its countersunk hole. A piston rod 27 is installed inside the piston cylinder 39. The upper part of the position adjusting screw 8 is threadedly connected to a position adjusting nut 11. Limiting grooves 42 are provided at both ends of the position adjusting nut 11, and limiting ribs 40 are located in the limiting grooves 42 to limit the rotation direction of the position adjusting nut 11, allowing it to move only in the up and down direction. A piston spring 3 is fitted onto both the positioning adjusting screw 8 and the piston cylinder 39, located between the positioning adjusting nut 11 and the upper end of the three-way assembly. The radius of the upper end face of the piston rod 27 is larger than the radius of the piston spring 3. The upper end of the three-way assembly is the lower limit of the piston spring 3. As the piston rod 27 enters the piston cylinder 39, the lower part of the piston spring 3 is in a compressed state. If the assembly is complete, the force generated by the rebound of the piston spring 3 acts on the lower side of the upper end of the piston rod 27, keeping it in contact with the positioning adjusting nut 11. When the positioning adjusting screw 8 rotates, causing the positioning adjusting nut 11 to move upward, because the upper part of the piston spring 3 is always in a compressed state, the piston rod 27 will also move upward with the positioning adjusting nut 11 under the action of the rebound force.
[0018] The center through hole of the positioning adjusting screw 8 allows the pressing connecting rod 7 to pass through. The lower end of the pressing connecting rod 7 is threaded and connected to the lower thread of the piston rod 27. The 10 holes on the end face of the positioning adjusting screw 8 mate with the 4 bosses at the lower end of the counter adjusting shaft 24. No matter how the counter adjusting shaft 24 rotates, the 4 bosses can always mate with 4 of the 10 holes on the end face of the positioning adjusting screw 8. The threaded hole of the positioning adjusting nut 11 mates with the left-hand thread of the external thread of the positioning adjusting screw 8.
[0019] Example 2 Based on Embodiment 1, a high-precision adjustable press-type metering device includes a three-way assembly comprising a three-way fixing head 30 threadedly connected to the upper end of the liquid inlet connector 21 and a three-way 13 threadedly connected to the three-way fixing head 30. A three-way liner 31 is provided inside the three-way 13. The lower end of the piston cylinder 39 is engaged between the three-way liner 31 and the three-way 13. The handle 12 is engaged at the three-way fixing head 30. The three-way 13 has grooves on both sides that cooperate with the limiting ribs 40 on the inner wall of the handle 12. The three-way 13 slides into the bottom of the handle 12 along the two limiting ribs 40 on the inner wall of the handle 12.
[0020] Based on Embodiment 1, a high-precision adjustable push-button type meter is provided. The counter assembly includes, from top to bottom, a counter cover 90, a transparent counter shell 91, an upper baffle 16, and a lower fixing cover 17. The lower fixing cover 17 is fitted onto the middle ring 18. Specifically, the protrusion on the middle ring 18 passes through two symmetrical holes on the side of the lower fixing cover 17 to clamp and limit the position adjustment screw 8. Multiple digital discs 92 are arranged on the outer periphery of the counter adjustment shaft 24. A counter mounting rod 93 is fixed between the bottom of the counter cover 90 and the counter housing 91. A toothed mechanism 94 matching each digital disc 92 is fixed on the counter mounting rod 93. Specifically, the inner side of the uppermost digital disc 92 has double protrusions that cooperate with the double-groove sleeve on the counter adjustment shaft 24 for installation. The protrusions and grooves are not shown in the figure. The other layers of digital discs 92 are fitted onto the counter adjustment shaft 24 but are not directly connected to it. The layers of digital discs 92 are connected by the toothed mechanism 94. The sides of the digital discs 92 have small teeth that drive the toothed mechanism 94 when rotated, causing the next layer of digital discs 92 to rotate. An observation window 41 is provided on the counter housing 91, through which the numbers displayed on the digital discs 92 can be observed. The upper outer shell 14 has protrusions inside the upper outer shell 14 and the upper baffle 16 protruding to position and limit the counter outer shell 91. When the counter adjustment shaft 24 rotates, it drives each digital disk 92 to rotate synchronously. The double groove of the protrusion of the counter adjustment shaft 24 cooperates with the protrusion of the inner hole of the fine adjustment knob 25. When the fine adjustment knob 25 is rotated, the counter adjustment shaft 24 and the digital disk 92 can be rotated synchronously. Both the fine adjustment knob 25 and the counter adjustment shaft 24 have through holes for the pressing connecting rod 7 to pass through. After the lower fixed cover 17 is locked with the middle ring 18, the retaining springs on both sides of the middle ring 18 hook into the square hole 120 on the inner wall of the handle 12, so that the metering mechanism has no extra degrees of freedom.
[0021] In this embodiment, a high-precision adjustable press-type metering device is provided with a connector connecting lock nut 33 between the extended connector 32 and the right-angle connector 34 to ensure that the right-angle connector 34 is in a vertically upward state after installation and tightening. The connector connecting lock nut 33 is also provided with an outlet fixing lock nut 29. The connector connecting lock nut 33 and the outlet fixing lock nut 29 are located in the space formed by the right-angle outer shell 37, the fixing ring 36 and the right-angle outer shell cover 38. Every 36-degree rotation of the fine-tuning knob 25 changes the value of the digital disc 92 by 0.005 microliters. When the four bosses below the counter adjustment shaft 24 engage with the position adjustment screw 8, rotating the counter adjustment shaft 24 causes the position adjustment nut 11 on the position adjustment screw 8 to rotate. When rotating the fine-tuning knob 25 increases the value of the digital disc 92, the position adjustment nut 11 moves upward. The piston rod 27, under the action of the rebound force of the piston spring 3, also moves upward and presses against the position adjustment nut 11. The cavity inside the piston cylinder 39 increases synchronously. When the pressing button 23 is pressed, it drives the pressing connecting rod 7 to apply force to the piston rod 27. The pressing force is greater than the rebound force of the piston spring 3, causing the piston rod 27 to be compressed into the cavity of the piston cylinder 39, thus discharging the liquid or reagent according to the prescribed amount. Conversely, when the fine-tuning knob 25 is turned to decrease the value of the digital dial 92, the positioning adjustment nut 11 moves downward. This downward movement compresses the piston spring 3, and the end face of the piston rod 27, which is in close contact with the lower end face of the positioning adjustment nut 11, also moves downward. The cavity inside the piston cylinder 39 decreases synchronously. When the pressing button 23 is pressed, it drives the pressing connecting rod 7 to apply force to the piston rod 27. The pressing force is greater than the force of the piston spring 3, causing the piston rod 27 to be compressed into the cavity of the piston cylinder 39, thus discharging a smaller volume of liquid or reagent. When the fine-tuning knob 25 is pulled upwards vertically, the four protrusions below the counter adjustment shaft 24 disengage from the end holes of the positioning adjustment screw 8. At this time, rotating the fine-tuning knob 25 changes the value of the digital dial 92, while the positioning adjustment nut 11 on the positioning adjustment screw 8 remains stationary. Therefore, the volume of the piston cylinder 39 will not change, and the dispensing volume will not change. This state can be used to calibrate the dispensing accuracy of the metering device. Adjust the value of the digital dial 92 to the actual value, release the fine-tuning knob 25, and under the action of the fine-tuning spring, the counter adjustment shaft 24 returns to its original position. The four protrusions re-insert into four of the ten holes, completing the fine-tuning of the device. When adjusting the fine-tuning knob 25 to the values on the digital dial 92, if the resistance is high, press the pressing button 23 to bring the piston rod 27 to the bottom of the piston cylinder 39. Do not release the pressing button 23, keeping the piston spring 3 in a compressed state. Adjusting the fine-tuning knob 25 will then reduce the resistance.Implementation of the liquid inlet / outlet mechanism: When the button 23 is pressed, atmospheric pressure is released outwards, and pressure is applied outwards. Due to the different positions of the check balls at the inlet connector 21 and the outlet connector 28, the inlet check ball 19 at the inlet connector 21 is forced to press tightly against the inlet sealing ring 22, preventing liquid from exiting the inlet connector 21. The outlet check ball 4 at the outlet connector 28 compresses the outlet spring 5, disengaging from the outlet sealing ring 6, thus opening the outlet connector 28 and allowing all liquid to flow out from the arc-shaped outlet pipe 3. 5. When the button 23 is released, atmospheric pressure draws inward and applies pressure inward. Since the check ball positions of the inlet connector 21 and the outlet connector 28 are different, the inlet check ball 19 at the inlet connector 21 is forced to detach from the inlet sealing ring 22, and the inlet connector 21 is opened to start liquid inlet. The outlet check ball 4 at the outlet connector 28 is pressed against the outlet sealing ring 6, so that the outlet connector 28 is in a closed state, allowing all the liquid to enter the cavity of the piston cylinder 39 from the inlet suction tube 10.
[0022] This invention provides a high-precision adjustable push-button dispensing meter, comprising an inlet / outlet mechanism, a counting mechanism, and a dispensing mechanism. The counting mechanism and the dispensing mechanism are connected vertically. The outlet and inlet connectors of the inlet / outlet mechanism are located on the side and bottom of the dispensing mechanism, respectively. Visualization is achieved through an observation window and mechanical counting components, displaying the set capacity and adjustment target. This meter uses a push-button dispensing method, offering high dispensing accuracy, a simple structure, and ease of carrying, disassembly, and relocation. A right-angle outer cover and a right-angle housing protect the right-angle connector and the outlet connector.
[0023] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and incorporate common knowledge or customary techniques in the art disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of this application is indicated by the claims.
[0024] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this application described above do not constitute a limitation on the scope of protection of this application.
Claims
1. A high-precision adjustable push-button type metering device, characterized in that, include: Liquid inlet / outlet mechanism, counting mechanism, and metering mechanism; The liquid inlet / outlet mechanism includes a three-way assembly screwed onto the bottle cap (2), with a liquid inlet connector (21) threaded onto the lower end of the three-way assembly. The bottle cap (2) is screwed onto the bottle (1). A limiting rib (40) is provided on the inner side of the handle (12). A liquid inlet straw (10) located inside the bottle (1) is connected to the lower end of the liquid inlet connector (21). A liquid inlet sealing ring (22), a liquid inlet check ball (19), and a liquid inlet spring (20) are installed sequentially from bottom to top inside the liquid inlet connector (21). A three-way assembly is installed at the upper end of the liquid inlet connector (21). A handle (12) is fixed to the outer periphery of the three-way assembly. An extension connector (32) connected to the three-way assembly is screwed onto one side of the handle (12). The extended connector (32) is connected to a liquid outlet connector (28) via a right-angle connector (34) at its outer end. The liquid outlet connector (28) is equipped with a liquid outlet sealing ring (6), a liquid outlet check ball (4), and a liquid outlet spring (5) from bottom to top. An arc-shaped liquid outlet pipe (35) is provided on the liquid outlet connector (28). A right-angle outer shell cover (38) and a right-angle outer shell (37) are also snapped onto the outside of the handle (12). A fixing ring (36) is snapped onto the upper end of the right-angle outer shell (37). The right-angle connector (34) and the liquid outlet connector (28) are located in the space formed by the right-angle outer shell (37), the fixing ring (36), and the right-angle outer shell cover (38). The counting mechanism includes a middle ring (18) and an upper housing (14) mounted on the upper end of the handle (12) by a lower locking nut (15). A counter adjustment shaft (24) is rotatably mounted on the top of the upper housing (14). A fine adjustment knob (25) located on the top of the upper housing (14) is fixed at the upper end of the counter adjustment shaft (24). A fine adjustment spring (26) is sleeved on the upper part of the counter adjustment shaft (24). The fine adjustment spring (26) is located between the upper boss of the counter adjustment shaft (24) and the top side of the upper housing (14). A counter assembly is fixed on the outer periphery of the counter adjustment shaft (24). An observation window (41) communicating with the upper housing (14) is provided on the counter assembly. A pressing connecting rod (7) extending through the counter adjustment shaft (24) and reaching the upper side of the fine adjustment knob (25) and the quantitative mechanism is passed through the counter adjustment shaft (24). A pressing button (23) is fixed at the upper end of the pressing connecting rod (7). The quantitative mechanism includes a positioning adjustment screw (8) connected to the lower end of the counter adjustment shaft (24) and a piston cylinder (39) connected to the upper end of the three-way assembly. A piston rod (27) is installed inside the piston cylinder (39). A positioning adjustment nut (11) is threadedly connected to the upper part of the positioning adjustment screw (8). Limiting grooves (42) are provided at both ends of the positioning adjustment nut (11). The limiting rib (40) is located in the limiting groove (42). A piston spring (3) is sleeved on both the positioning adjustment screw (8) and the piston cylinder (39) between the positioning adjustment nut (11) and the upper end of the three-way assembly. The upper end radius of the piston rod (27) is larger than the radius of the piston spring (3). The lower end of the pressing connecting rod (7) is threaded and threadedly connected to the lower part of the piston rod (27).
2. The high-precision adjustable press-type metering device according to claim 1, characterized in that, The three-way assembly includes a three-way fixing head (30) threaded to the upper end of the liquid inlet connector (21) and a three-way (13) threaded to the three-way fixing head (30). The three-way fixing head (30) is threaded to the bottle cap (2). A three-way liner (31) is provided inside the three-way (13). The lower end of the piston cylinder (39) is engaged between the three-way liner (31) and the three-way (13). The handle (12) is engaged at the three-way fixing head (30).
3. The high-precision adjustable press-type metering device according to claim 1, characterized in that, The counter assembly includes, from top to bottom, a counter cover (90), a transparent counter shell (91), an upper baffle (16), and a lower fixing cover (17). The lower fixing cover (17) is fitted onto the middle ring (18), and an observation window (41) is provided on the counter shell (91). Multiple digital discs (92) are provided on the outer periphery of the counter adjustment shaft (24), and the inner side of the uppermost digital disc (92) is provided with double protrusions that cooperate with the double groove sleeves on the counter adjustment shaft (24). A counter mounting rod (93) is fixed between the bottom of the counter cover (90) and the counter housing (91), and a tooth (94) matching the digital disc (92) is fixed on the counter mounting rod (93).
4. The high-precision adjustable press-type metering device according to claim 1, characterized in that, A connector connecting nut (33) is also provided between the extended connector (32) and the right-angle connector (34). An outlet fixing nut (29) is also provided on the connector connecting nut (33). The connector connecting nut (33) and the outlet fixing nut (29) are located in the space formed by the right-angle shell (37), the fixing ring (36) and the right-angle shell cover (38).