A paper pH detection pen

Abstract

The utility model relates to paper pH value detection technical field discloses a paper pH value detection pen, including the pen cover, be provided with the pen core in the pen cover, the bottom fixedly connected with the pen head of pen core, the side of pen cover is provided with the limit mouth, the fixedly connected with pressure pipe in the pen cover, the bottom of pressure pipe and the top end of pen core intercommunication, the transmission link of limit mouth is slidably connected, the one end bottom fixedly connected with the push rod of transmission link close to the pen cover, the bottom fixedly connected with the piston of push rod, both sides of pen core are fixedly connected with the sealed box, the sealed box is slidably connected with the limit board in, the limit board is provided with the liquid discharge opening, and the sealed board is fixedly connected with the communication opening between two limit boards, this paper pH value detection pen, can avoid the traditional device in the use process, the acid alkali indicator solvent in the pen core consumes too fast, leads to the problem that the pen core needs to be frequently replaced, effectively improved the efficiency of the device for the large quantities of paper pH value detection work.

Description

Technical Field

[0001] This utility model relates to the field of paper pH testing technology, specifically a paper pH testing pen. Background Technology

[0002] Paper is a thin sheet made of plant fibers. In modern society, paper is an important tool for recording. In order to ensure its quality, stability and durability, especially in printing, storage and archival work, it is generally necessary to test the acidity and alkalinity of paper. By testing the acidity and alkalinity of paper, the acidity and alkalinity of paper can be detected and adjusted in time to meet the needs of different application scenarios.

[0003] When testing the pH of paper, a pH test pen is usually used. A pH test pen is a tool specifically designed to test the pH of paper. It looks similar to a regular ballpoint pen, but the principle is different. The pen tip of the pH test pen contains an acid-base indicator solution. When the pen tip is used to stroke the paper, the solution inside the pen comes into contact with the paper, and the writing on the paper will change color according to the pH of the paper. Users can then observe the color change and compare it with the color chart attached to the pen to determine the pH value of the paper.

[0004] Traditional paper pH testing pens consume a significant amount of the pH indicator solvent during use. Therefore, when testing the pH of multiple batches of paper, the pen refills need to be replaced frequently. However, the process of replacing the refills is too cumbersome and can affect the efficiency of the paper pH testing. To address this, we propose a new paper pH testing pen. Utility Model Content

[0005] The purpose of this invention is to provide a paper pH testing pen to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pen sleeve, a pen refill inside the pen sleeve, a pen tip fixedly connected to the bottom end of the pen refill, a limiting port on one side of the pen sleeve, a pressure tube fixedly connected inside the pen sleeve, the bottom end of the pressure tube communicating with the top end of the pen refill, a transmission rod slidably connected inside the limiting port, a push rod fixedly connected to the bottom end of the transmission rod near the pen sleeve, a piston fixedly connected to the bottom end of the push rod, and the piston located inside the pressure tube;

[0007] Both sides of the pen refill are fixedly connected to a sealing box, and a communication port is provided between the sealing box and the pen refill. A limit plate is slidably connected inside the sealing box, and a drain port is provided on the limit plate. A sealing plate is fixedly connected between the two limit plates through the communication port, and the sealing plate is located inside the pen refill.

[0008] Preferably, mounting bases are fixedly connected to both sides of the bottom wall of the sealed box, and a slidably connected sealing cover is fitted on each mounting base. The top of each sealing cover is fixedly connected to the bottom of the limiting plate on the same side. Several springs are fixedly connected between the top of the mounting base and the bottom of the limiting plate on the same side, and the springs are all located inside the sealing cover on the same side.

[0009] Preferably, the inner walls on both sides of the limiting port are provided with limiting grooves, and a number of evenly distributed limiting blocks are fixedly connected in the limiting grooves. The limiting blocks are all hollow structures, the top of the limiting blocks is an inclined surface structure, and the bottom of the limiting blocks is a planar structure.

[0010] Preferably, a push plate is fixedly connected to the end of the transmission rod away from the pen sleeve, and a storage groove is provided on both sides of the transmission rod. The storage groove is aligned with the limiting groove on the same side, and an installation groove is provided on both sides of each storage groove.

[0011] Preferably, a retaining plate is rotatably connected in the limiting groove, and the rotating shaft of the retaining plate is located in the mounting groove on the same side thereon. A torsion spring is fixedly connected between the rotating shaft of the retaining plate and the inner wall of the mounting groove on the same side thereon.

[0012] Preferably, the pen cap is provided with a plurality of scale grooves, the scale grooves are located on one side of the limiting port, and each scale groove is aligned with the position of each limiting block.

[0013] Preferably, a colorimetric card is fixedly connected to the pen cap, and a pen cap is fitted onto the bottom of the pen cap.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this invention, after the acid-base indicator solvent in the pen refill is consumed, a pusher plate can be used to push the push rod down, and a piston can be used to pressurize the acid-base indicator solvent in the pressure tube. At this time, the acid-base indicator solvent in the pressure tube will press the sealing plate downward. When the sealing plate moves downward under pressure, the acid-base indicator solvent in the pressure tube will first enter the upper part of the sealing box, then enter the lower part of the sealing box through the drain port on the limiting plate, and finally enter the pen refill, thus completing the replenishment of the acid-base indicator solvent in the pen refill. This avoids the problem of the acid-base indicator solvent in the pen refill being consumed too quickly during the use of traditional devices, which requires frequent pen refill replacement. This effectively improves the efficiency of the device when performing acid-base detection on large quantities of paper.

[0016] 2. When the push plate descends, the inclined surface of the top of the limiting block presses against the card plate, causing it to rotate into the storage slot. When the top of the card plate passes the limiting block, the torsion spring rebounds, causing the card plate to rotate out of the storage slot and lock onto the bottom plane of the limiting block. This limits the push plate and prevents it from moving upward, which could cause the piston to suck up the acid-base indicator solvent in the pressure tube. Furthermore, because the limiting block has a hollow structure, the card plate makes a relatively loud sound when it contacts the limiting block due to the force of the torsion spring. The operator can use this sound in conjunction with the scale groove to control the amount of acid-base indicator solvent added to the pen refill, further improving the device's auxiliary function for the operator. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the pen cap structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the pen cap of this utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the pen refill of this utility model;

[0021] Figure 5 This is a schematic diagram of the sealing plate and its connecting components of the present invention;

[0022] Figure 6 This is a schematic diagram of the cross-sectional structure of the pressure tube of this utility model;

[0023] Figure 7 This is a schematic diagram of the cross-sectional structure of the transmission rod of this utility model;

[0024] Figure 8 This utility model Figure 6 The diagram shows an enlarged view of area A.

[0025] In the diagram: 1. Pen cap; 11. Limiting port; 12. Scale groove; 13. Colorimeter card; 14. Pen cap; 2. Pen refill; 21. Pen tip; 22. Sealing box; 23. Connecting port; 24. Limiting plate; 25. Drain port; 26. Sealing plate; 3. Mounting base; 31. Sealing cover; 32. Spring; 4. Pressure tube; 41. Transmission rod; 42. Push rod; 43. Piston; 44. Push plate; 45. Storage slot; 46. Mounting slot; 5. Clamping plate; 51. Torsion spring; 6. Limiting groove; 61. Limiting block. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-8 This utility model provides a technical solution: a paper pH test pen, including a pen sleeve 1, a colorimetric card 13 fixedly connected to the pen sleeve 1, a pen cap 14 fitted at the bottom of the pen sleeve 1, a pen refill 2 inside the pen sleeve 1, a pen tip 21 fixedly connected to the bottom end of the pen refill 2, a limiting port 11 on one side of the pen sleeve 1, a pressure tube 4 fixedly connected inside the pen sleeve 1, the bottom end of the pressure tube 4 communicating with the top end of the pen refill 2, a transmission rod 41 slidably connected inside the limiting port 11, a push rod 42 fixedly connected to the bottom end of the transmission rod 41 near the pen sleeve 1, a piston 43 fixedly connected to the bottom end of the push rod 42, and the piston 43 located inside the pressure tube 4. The pH indicator solvent composition of the pen refill 2 and the pressure tube 4 is as follows: bromocresol purple: 0.05%-2%, anhydrous ethanol: 5%-20%, polyvinyl alcohol: 0.5%-1%, deionized water: 77%-93%.

[0028] Furthermore, by placing the pen cap 14 on the pen sleeve 1, the pen tip 21 can be protected, preventing the pen tip 21 from being exposed to the air for a long time, which would cause the acid-base indicator solvent on the pen tip 21 to dry out. At the same time, it can also prevent the pen tip 21 from being deformed or damaged due to impact. Both the pen refill 2 and the pressure tube 4 contain acid-base indicator solvent. When the acid-base level of the paper is tested, the pen tip 21 is used to pass through the paper surface. At this time, the acid-base indicator solvent in the pen refill 2 will adhere to the paper through the pen tip 21. The acid-base indicator solvent left on the paper will change color according to the acid-base level of the paper. By setting the color chart 13, the color of the pen marks on the paper can be compared with the color indicated on the color chart 13. The pH value is determined according to the color range of the color chart 13. The yellow to green gradient range corresponds to pH < 7, and the green to blue gradient range corresponds to pH ≥ 7 (pH 4 corresponds to Pantone standard color PANTON 3965, pH 5 corresponds to Pantone standard color PANTON 381, pH 6 corresponds to Pantone standard color PANTON 117, pH 7 corresponds to Pantone standard color PANTON 2407, and pH 8 corresponds to Pantone standard color PANTON 7474). When the acid-base indicator solvent in the pen refill 2 is used up, the transmission rod 41 is pushed down along the limit port 11. The transmission rod 41 will drive the push rod 42 and the piston 43 to descend together. During the descent, the piston 43 will pressurize the acid-base indicator solvent in the pressure tube 4 and deliver it to the pen refill 2, thus replenishing the acid-base indicator solvent in the pen refill 2. This makes the paper acid-base test pen have a longer service life and is more suitable for acid-base test of large batches of paper.

[0029] Combined with appendix Figure 4 and Figure 5 As shown, a sealing box 22 is fixedly connected to both sides of the pen refill 2. A communication port 23 is provided between the sealing box 22 and the pen refill 2. A limiting plate 24 is slidably connected inside the sealing box 22. A drain port 25 is provided on the limiting plate 24. A sealing plate 26 is fixedly connected between the two limiting plates 24 through the communication port 23. The sealing plate 26 is located inside the pen refill 2. A mounting base 3 is fixedly connected to both sides of the bottom wall of the sealing box 22. A slidably connected sealing cover 31 is fitted on the mounting base 3. The top of the sealing cover 31 is fixedly connected to the bottom of the limiting plate 24 on the same side. Several springs 32 are fixedly connected between the top of the mounting base 3 and the bottom of the limiting plate 24 on the same side. The springs 32 are all located inside the sealing cover 31 on the same side.

[0030] Furthermore, when piston 43 pressurizes the acid-base indicator solvent in pressure tube 4, the solvent pressurizes sealing plate 26, causing it to descend. During this descent, sealing plate 26 compresses spring 32, causing it to contract. After descending a certain distance, sealing plate 26 engages with limiting plates 24 on both sides, separating sealing box 22 and connecting port 23 into upper and lower parts. The acid-base indicator solvent in pressure tube 4 then enters sealing box 22 through connecting port 23 in the upper part. The solvent then flows through drain port 25 on limiting plate 24 into the lower part of sealing box 22, and finally through connecting port 23 into pen refill 2, replenishing the solvent in pen refill 2. After replenishing the solvent, piston 43 stops descending, and the solvent in pressure tube 4... When the pressure on the sealing plate 26 disappears, the spring 32 begins to rebound, causing the limiting plate 24 and the sealing plate 26 to rise until the limiting plate 24 and the inner top wall of the sealing box 22 are in contact. At this time, the top of the pen refill 2 is sealed by the sealing plate 26, which prevents the acid-base indicator solvent in the pressure tube 4 from continuing to enter the pen refill 2. At this time, the top of the pressure tube 4 is sealed by the piston 43, and its bottom is sealed by the sealing plate 26, which can better preserve the acid-base indicator solvent in the pressure tube 4 and prevent the acid-base indicator solvent in the pressure tube 4 from evaporating or drying out. The mounting base 3 can limit the maximum distance of the descent of the limiting plate 24, preventing the limiting plate 24 from directly contacting the inner bottom wall of the sealing box 22, which would block the pen refill 2 and prevent the acid-base indicator solvent in the pressure tube 4 from entering the pen refill 2. The sealing cover 31 can protect the spring 32 without affecting the descent of the limiting plate 24.

[0031] Combined with appendix Figure 1 , Figure 2 , Figure 6 , Figure 7 and Figure 8As shown, limit grooves 6 are formed on both inner walls of the limiting port 11. Several evenly distributed limit blocks 61 are fixedly connected in the limit grooves 6. The limit blocks 61 are all hollow structures. The top of the limit block 61 is an inclined surface structure, and the bottom of the limit block 61 is a flat structure. A push plate 44 is fixedly connected to the end of the transmission rod 41 away from the pen sleeve 1. Storage grooves 45 are formed on both sides of the transmission rod 41. The storage grooves 45 are aligned with the limit grooves 6 on the same side. Each storage groove 45 has an installation groove 46 on both sides. A retaining plate 5 is rotatably connected inside the slot 6. The retaining plate 5 is made of metal. The pivot of the retaining plate 5 is located in the mounting slot 46 on the same side. The pivot of the retaining plate 5 and the mounting slot 46 are close to the inner bottom wall of the storage slot 45. A torsion spring 51 is fixedly connected between the pivot of the retaining plate 5 and the inner wall of the mounting slot 46 on the same side. Several scale slots 12 are provided on the pen cap 1. The scale slots 12 are located on one side of the limiting port 11. Each scale slot 12 is aligned with the position of each limiting block 61. The limiting block 61 is made of metal.

[0032] Furthermore, the push plate 44 can better push the transmission rod 41 to descend. When replenishing the acid-base indicator solvent in the pen refill 2, the clamping plates 5 on both sides of the transmission rod 41 will descend along with it. When the clamping plates 5 descend, they come into contact with the edge of the limiting block 61 in the limiting groove 6. As the clamping plates 5 descend, the limiting block 61 will squeeze the clamping plates 5, causing them to rotate into the receiving groove 45. During the rotation, the torsion spring 51 will tighten. When the clamping plates 5 pass the limiting block 61 that is squeezing them, the clamping plates 5 will be limited by the limiting block 61. As the compression of block 61 disappears, torsion spring 51 begins to rebound, causing the card plate 5 to rotate out of the storage slot 45 and the top of the card plate 5 to abut against the bottom plane of the limiting block 61, thereby limiting the transmission rod 41 and other components to prevent them from moving upward. Since the limiting block 61 is a metal hollow structure, when the card plate 5, which is also made of metal, is driven by torsion spring 51 and hits the limiting block 61, a relatively crisp sound will be produced. At this time, by the number of this sound and the scale groove 12 flush with each limiting block 61, the operator can better control the dosage of acid-base indicator solvent added to the pen refill 2.

[0033] Working principle: When testing the acidity and alkalinity of paper, first remove the pen cap 14, then use the pen tip 21 to stroke across the paper surface. At this time, the acid and alkalinity indicator solvent in the pen core 2 will adhere to the paper through the pen tip 21. The acid and alkalinity indicator solvent left on the paper will change color according to the acidity and alkalinity of the paper. By observing the color change of the pen stroke, the acidity and alkalinity of the paper being tested can be determined.

[0034] When testing the pH of a large quantity of paper, after the pH indicator solvent in the pen refill 2 is used up, the push plate 44 drives the transmission rod 41 to descend along the limiting port 11. The transmission rod 41 drives the push rod 42 and piston 43 to descend together. During the descent, the piston 43 applies pressure to the pH indicator solvent in the pressure tube 4. At this time, the pH indicator solvent in the pressure tube 4 applies pressure to the sealing plate 26, causing the sealing plate 26 to descend. During the descent, the sealing plate 26 compresses the spring 32, causing it to contract. After the sealing plate 26 descends to a certain extent, it cooperates with the limiting plates 24 on both sides to separate the sealing box 22 and the connecting port 23 into upper and lower parts. At this time, the pH indicator solvent in the pressure tube 4 enters the sealing box 22 through the connecting port 23 in the upper part, and then enters the pH indicator solvent in the sealing box 22. The solution enters the lower sealed box 22 through the drain port 25 on the limiting plate 24, and finally enters the pen refill 2 through the connecting port 23 in the lower part, completing the replenishment of the acid-base indicator solvent in the pen refill 2. After the replenishment of the acid-base indicator solvent in the pen refill 2 is completed, the piston 43 stops descending. At this time, the pressure of the acid-base indicator solvent in the pressure tube 4 on the sealing plate 26 disappears. At this time, the spring 32 begins to rebound, driving the limiting plate 24 and the sealing plate 26 to rise until the limiting plate 24 and the inner top wall of the sealed box 22 are in contact with each other. At this time, the top of the pen refill 2 is sealed by the sealing plate 26, which can prevent the acid-base indicator solvent in the pressure tube 4 from continuing to enter the pen refill 2. At this time, the top of the pressure tube 4 is sealed by the piston 43, and its bottom is sealed by the sealing plate 26, which can better preserve the acid-base indicator solvent in the pressure tube 4.

[0035] As the transmission rod 41 descends, the clamping plates 5 on both sides descend along with it. During descent, the clamping plates 5 come into contact with the edge of the limiting block 61 within the limiting groove 6. The limiting block 61 then presses against the clamping plates 5, causing them to rotate into the receiving groove 45. During this rotation, the torsion spring 51 tightens. When the clamping plates 5 pass the limiting block 61 that was pressing against them, the pressure from the limiting block 61 disappears, and the torsion spring 51 begins to rebound, causing the clamping plates 5 to rotate. The storage slot 45 is opened, and the top of the card plate 5 is placed against the bottom plane of the limiting block 61 to limit the transmission rod 41 and other components, preventing them from moving upward. Since the limiting block 61 is a metal hollow structure, when the card plate 5, which is also made of metal, is driven by the torsion spring 51 and hits the limiting block 61, a relatively crisp sound will be produced. At this time, by the number of this sound and the scale groove 12 that is flush with each limiting block 61, the operator can better control the dosage of acid-base indicator solvent added to the pen refill 2.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A paper pH testing pen, comprising a pen sleeve (1), wherein a pen core (2) is disposed inside the pen sleeve (1), and a pen tip (21) is fixedly connected to the bottom end of the pen core (2), characterized in that: A limiting port (11) is provided on one side of the pen sleeve (1). A pressure tube (4) is fixedly connected inside the pen sleeve (1). The bottom end of the pressure tube (4) is connected to the top end of the pen refill (2). A transmission rod (41) is slidably connected inside the limiting port (11). A push rod (42) is fixedly connected to the bottom end of the transmission rod (41) near the pen sleeve (1). A piston (43) is fixedly connected to the bottom end of the push rod (42). The piston (43) is located inside the pressure tube (4). Both sides of the pen refill (2) are fixedly connected to a sealing box (22). A communication port (23) is provided between the sealing box (22) and the pen refill (2). A limiting plate (24) is slidably connected inside the sealing box (22). A drain port (25) is provided on the limiting plate (24). A sealing plate (26) is fixedly connected between the two limiting plates (24) through the communication port (23). The sealing plate (26) is located inside the pen refill (2).

2. The paper pH testing pen according to claim 1, characterized in that: The sealing box (22) has mounting bases (3) fixedly connected to both sides of the bottom wall. Each mounting base (3) is fitted with a sliding sealing cover (31). The top of each sealing cover (31) is fixedly connected to the bottom of the limiting plate (24) on the same side. Several springs (32) are fixedly connected between the top of the mounting base (3) and the bottom of the limiting plate (24) on the same side. Each spring (32) is located inside the sealing cover (31) on the same side.

3. The paper pH testing pen according to claim 1, characterized in that: The inner walls on both sides of the limiting port (11) are provided with limiting grooves (6). Several evenly distributed limiting blocks (61) are fixedly connected in the limiting grooves (6). The limiting blocks (61) are all hollow structures. The top of the limiting block (61) is an inclined surface structure, and the bottom of the limiting block (61) is a planar structure.

4. The paper pH testing pen according to claim 1, characterized in that: The transmission rod (41) is fixedly connected to a push plate (44) at the end away from the pen cap (1). A storage groove (45) is provided on both sides of the transmission rod (41). The storage groove (45) is aligned with the limiting groove (6) on the same side. An installation groove (46) is provided on both sides of each storage groove (45).

5. The paper pH testing pen according to claim 4, characterized in that: A retaining plate (5) is rotatably connected inside the limiting groove (6). The rotating shaft of the retaining plate (5) is located in the mounting groove (46) on the same side. A torsion spring (51) is fixedly connected between the rotating shaft of the retaining plate (5) and the inner wall of the mounting groove (46) on the same side.

6. The paper pH testing pen according to claim 3, characterized in that: The pen cap (1) is provided with a number of scale grooves (12), which are located on one side of the limiting port (11), and each scale groove (12) is aligned with the position of each limiting block (61).

7. The paper pH testing pen according to claim 1, characterized in that: A colorimetric card (13) is fixedly connected to the pen sleeve (1), and a pen cap (14) is fitted onto the bottom of the pen sleeve (1).

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