Salinity meter

Abstract

The utility model relates to the technical field of measuring instruments, in particular to a salinity meter which comprises a pen point part and a pen holder part, and the pen point part comprises a pen point shell and an inner container; the inner container comprises a detection section, a reinforcing section and a connecting section which are connected in sequence; the diameter of the reinforcing section is gradually increased from the detection section to the axial direction of the connecting section, the diameter of the connecting section is gradually reduced in the axial direction away from the reinforcing section, and the diameter of the end face, away from the reinforcing section, of the connecting section is larger than that of the detection section. The pen point shell fixedly covers the outer surfaces of the detection section and the reinforcing section; the penholder part comprises a penholder shell; the connecting section is inserted into the penholder shell from the mounting opening; the peripheral wall face of the connecting section is connected with the inner wall face of the pen holder shell in an adhesive mode. According to the salinometer, the radial strength of the joint of the pen head part and the pen holder part is enhanced, the risk of breakage of the pen head part and the pen holder part is reduced, the service life is prolonged, and the problem that the joint of the pen head part and the pen holder part of an existing pen type salinometer is insufficient in structural strength and prone to breakage is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of measuring instruments, and in particular to a salinity meter. Background Technology

[0002] A salinity meter is an instrument used to quickly determine the weight percentage concentration or refractive index of a salt solution (mainly sodium chloride). There are various types of salinity meters, such as pen salinity meters, laboratory precision salinity meters, and online salinity meters. Among them, pen salinity meters are widely used due to their small size, portability, and ease of operation.

[0003] The structure of a pen-type salinity meter mainly consists of a pen head and a pen barrel. The pen barrel houses the circuit board and electronic components such as the battery, while the pen head is used to mount detection components (such as temperature probes and conductive electrodes). During use, the pen head of a pen-type salinity meter needs to be frequently inserted into the solution being tested and stirred. However, current pen-type salinity meters often use a spring clip connection between the pen head and the pen barrel, resulting in insufficient structural strength at the connection point and a tendency to break. Utility Model Content

[0004] The main purpose of this invention is to provide a salinity meter that enhances the radial strength at the connection between the pen tip and the pen barrel, reduces the risk of breakage between the pen tip and the pen barrel, extends the service life, and solves the problem of insufficient structural strength at the connection between the pen tip and the pen barrel in existing pen-type salinity meters, which easily leads to breakage.

[0005] To achieve the above objectives, the present invention proposes a salinity meter comprising: a pen head, the pen head including a pen head shell and an inner liner; the inner liner including a detection section, a reinforcing section, and a connecting section connected in sequence; the diameter of the reinforcing section gradually increases axially from the detection section towards the connecting section, and the diameter of the connecting section gradually decreases axially away from the reinforcing section, and the diameter of the end face of the connecting section away from the reinforcing section is larger than the diameter of the detection section; the detection section, the reinforcing section, and the connecting section are integrally formed; the pen head shell is fixedly covered on the outer surface of the detection section and the reinforcing section; a pen barrel, the pen barrel including a pen barrel shell, one end of the pen barrel shell having an installation port, the connecting section being inserted into the interior of the pen barrel shell through the installation port; the outer peripheral wall of the connecting section being adhesively bonded to the inner wall of the pen barrel shell; the end face of the pen barrel shell facing the pen head shell abutting against the pen head shell.

[0006] Optionally, the pen tip further includes a temperature probe and a conductive electrode, and the pen barrel further includes a circuit board disposed within the pen barrel housing; one end of the temperature probe is fixedly embedded in the end of the detection segment away from the connecting segment, and the other end of the temperature probe protrudes from the pen tip housing along the axial direction of the detection segment; the inner circumferential side of the conductive electrode is fixedly embedded in the outer circumferential wall of the detection segment, and the outer circumferential wall surface of the conductive electrode is exposed on the outer circumferential wall surface of the pen tip housing; the temperature probe and the conductive electrode are electrically connected to the circuit board respectively; there are two conductive electrodes, and the two conductive electrodes are arranged sequentially along the axial direction of the detection segment.

[0007] Optionally, the outer peripheral wall of the pen tip housing is provided with a first opening corresponding to each of the conductive electrodes, and the outer peripheral side of the conductive electrode extends into the first opening so that the outer peripheral wall surface of the conductive electrode is exposed in the pen tip housing; the outer peripheral wall surface of the conductive electrode is adapted to the outer peripheral wall surface of the pen tip housing; the end of the pen tip housing away from the pen barrel housing is provided with a second opening that matches the temperature probe, and the end of the temperature probe away from the detection section passes through the second opening and protrudes out of the pen tip housing.

[0008] Optionally, the conductive electrode includes an arc-shaped ring and an arc-shaped protrusion. The inner circumferential side of the arc-shaped protrusion is fixedly connected to the outer circumferential side of the arc-shaped ring, and the outer circumferential side of the arc-shaped protrusion protrudes along the radial direction of the arc-shaped ring. The outer circumferential wall of the detection section is provided with an arc-shaped groove corresponding to the arc-shaped ring. The inner circumferential side of the arc-shaped ring is embedded in the arc-shaped groove, and the outer circumferential side of the arc-shaped ring is embedded in the interior of the pen tip housing. The arc-shaped protrusion extends into the first opening, and the outer circumferential wall surface of the arc-shaped protrusion is flush with the outer circumferential wall surface of the pen tip housing. The shape of the first opening is adapted to the shape of the arc-shaped protrusion, and the number of the first openings is equal to the number of the arc-shaped protrusions.

[0009] Optionally, two arc-shaped protrusions are fixedly connected to the outer periphery of the arc-shaped ring, and the two arc-shaped protrusions are arranged symmetrically with respect to the arc-shaped ring axis.

[0010] Optionally, the pen head further includes a lead wire tube, a probe lead wire, and an electrode lead wire; the detection section, the reinforcing section, and the connecting section have interconnected lead wire grooves along the axial direction inside, and the end of the lead wire groove away from the temperature probe is connected to the inside of the pen barrel shell; one end of the probe lead wire is connected to the temperature probe, and the other end of the probe lead wire passes through the lead wire groove into the pen barrel shell and connects to the circuit board; one end of the electrode lead wire is connected to the conductive electrode, and the other end of the electrode lead wire passes through the lead wire groove into the pen barrel shell and connects to the circuit board; the lead wire tube is sleeved around the probe lead wire and the electrode lead wire, and the outer peripheral wall of the lead wire tube abuts against the inner peripheral wall of the lead wire groove.

[0011] Optionally, the outer peripheral wall of the connecting segment has two dispensing grooves, which are symmetrically arranged with respect to the plane containing the axis of the connecting segment.

[0012] Optionally, the pen barrel housing has a first cavity and a second cavity that communicate with each other. The first cavity and the second cavity are arranged sequentially along the axial direction of the pen barrel housing, and the second cavity is located at the end of the first cavity away from the mounting port. The shape of the first cavity matches the shape of the connecting section.

[0013] Optionally, the pen barrel also includes a bottom shell and a battery disposed in the second cavity. The battery is provided with a charging interface and is electrically connected to the circuit board. The pen barrel shell has a first opening at the end away from the mounting port. The battery is disposed at the end of the second cavity near the first opening. The bottom shell is detachably covered by the first opening. The end face of the bottom shell facing the first opening has a charging opening. The end of the charging interface away from the battery extends into the charging opening.

[0014] Optionally, the pen barrel also includes a dust cover, which is movably connected to the bottom shell and is used to completely cover the charging opening or expose the charging opening.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting the diameter of the connection between the reinforcing section and the connecting section to be the largest, and by having the pen tip shell cover the outer periphery of the detection section and the reinforcing section, the connecting section can protrude from the pen tip shell. When the connecting section is fully inserted into the mounting opening of the pen barrel shell, the end face of the pen barrel shell facing the pen tip shell can abut against the pen tip shell. The protruding connecting section can enhance the radial strength of the connection between the pen tip and the pen barrel. Since the diameter of the connection between the reinforcing section and the connecting section is the largest, it can further enhance the radial strength of the connection between the pen tip and the pen barrel. The outer peripheral wall of the connecting section is fixed to the inner wall of the pen barrel shell with adhesive, which prevents the connecting section from falling off from the pen barrel shell. This solves the problem of insufficient structural strength at the connection between the pen tip and the pen barrel of existing pen-type salinity meters, which is prone to breakage.

[0017] 2. The pen tip shell is integrally formed with the detection section, reinforcing section, temperature probe, and conductive electrode through injection molding. This results in no detachable (excluding violent disassembly) connection points on the pen tip shell, leading to a more uniform stress distribution. The pen tip shell fits tightly with the detection section and reinforcing section, as well as with the temperature probe and conductive electrode. This effectively improves the overall structural strength of the pen tip and reduces the risk of cracks in the pen tip shell. As a result, the salinity meter of this invention can be used to measure the salinity of brine solutions at higher temperatures.

[0018] 3. By setting up dispensing grooves, adhesives (glue, sealant, etc.) can be accurately injected, and the amount of adhesive injected is easier to control. At the same time, the two mutually symmetrical dispensing grooves can also serve as fixed fulcrums. Specifically, when performing secondary injection molding on the pen tip to form the pen tip shell, the inner liner with the embedded temperature probe and conductive electrode needs to be fixed in the mold of the pen tip shell. At this time, the temperature probe can be used as a fixed fulcrum at one end, and the two dispensing grooves as fixed fulcrums at the other end. This can ensure that the inner liner, temperature probe, and conductive electrode are accurately positioned in the mold during injection molding, resulting in a uniform thickness of the pen tip shell after injection molding, which helps to improve product quality. Attached Figure Description

[0019] Figure 1 This is an explosion diagram of a salinity meter according to an embodiment of the present invention;

[0020] Figure 2 This is an exploded schematic diagram of the pen tip of a salinity meter according to an embodiment of the present invention.

[0021] Figure 3 This is a front view of the pen head of a salinity meter according to an embodiment of the present invention;

[0022] Figure 4 for Figure 3 Sectional view at point AA;

[0023] Figure 5 This is a front view of a salinity meter according to an embodiment of the present invention;

[0024] Figure 6 for Figure 5 Sectional view at point BB;

[0025] Figure 7 for Figure 5 A partial sectional view at point BB (with the pen tip hidden);

[0026] Figure 8 This is an explosion diagram of a salinity meter according to another embodiment of the present invention.

[0027] In the attached diagram: 1. Pen head; 11. Pen head shell; 111. First opening; 112. Second opening; 12. Inner liner; 121. Detection section; 1211. Arc groove; 122. Reinforcing section; 123. Connecting section; 1231. Glue groove; 124. Wire groove; 13. Temperature probe; 14. Conducting electrode; 141. Arc ring; 142. Arc protrusion; 2. Pen barrel; 21. Pen barrel shell; 211. Mounting port; 212. First cavity; 213. Second cavity; 214. First opening; 22. Circuit board; 23. Battery; 231. Charging interface; 24. Bottom shell; 241. Charging opening; 25. Dust cover. Detailed Implementation

[0028] 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.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a fixed connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal connection of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] Please see Figures 1 to 4 To solve the above-mentioned technical problems, this utility model proposes a salinity meter, comprising:

[0033] The pen head 1 includes a pen head shell 11 and an inner liner 12. The inner liner 12 includes a detection section 121, a reinforcing section 122, and a connecting section 123 connected in sequence. The diameter of the reinforcing section 122 gradually increases from the detection section 121 towards the connecting section 123 in the axial direction, and the diameter of the connecting section 123 gradually decreases in the axial direction away from the reinforcing section 122. The diameter of the end face of the connecting section 123 away from the reinforcing section 122 is larger than the diameter of the detection section 121. The detection section 121, the reinforcing section 122, and the connecting section 123 are integrally formed.

[0034] Please see Figures 2 to 4 The pen tip shell 11 is fixedly covered on the outer surface of the detection section 121 and the reinforcing section 122;

[0035] Please see Figures 5 to 7The pen barrel 2 includes a pen barrel shell 21. One end of the pen barrel shell 21 along its length is provided with a mounting port 211. The connecting segment 123 is inserted into the interior of the pen barrel shell 21 through the mounting port 211. The outer peripheral wall of the connecting segment 123 is glued to the inner wall of the pen barrel shell 21. The end face of the pen barrel shell 21 facing the pen tip shell 11 abuts against the pen tip shell 11.

[0036] This invention configures the inner liner 12 as an integrally formed detection section 121, reinforcement section 122, and connecting section 123, which can effectively reduce the connection gaps between the detection section 121, reinforcement section 122, and connecting section 123, thereby enhancing the overall support strength of the inner liner 12.

[0037] By setting the diameter of the reinforcing section 122 to gradually increase axially from the detection section 121 towards the connecting section 123, and the diameter of the connecting section 123 to gradually decrease axially away from the reinforcing section 122, and by setting the end face diameter of the connecting section 123 away from the reinforcing section 122 to be larger than the end face diameter of the reinforcing section 122 connected to the detection section 121, the diameter at the connection point of the reinforcing section 122 and the connecting section 123 is maximized; the pen tip housing 11 covers the outer periphery of the detection section 121 and the reinforcing section 122, allowing the connecting section 123 to protrude from the pen tip housing 11. When the connecting section 123 is fully inserted into the mounting port 211 of the pen barrel housing 21, the diameter of the connecting section 123 is maximized. When in use, the end face of the pen barrel shell 21 facing the pen tip shell 11 can abut against the pen tip shell 11. The protruding connecting section 123 can enhance the radial strength of the connection between the pen tip 1 and the pen barrel 2. Since the diameter of the connection between the reinforcing section 122 and the connecting section 123 is large, the radial strength of the connection between the pen tip 1 and the pen barrel 2 can be further enhanced. The outer peripheral wall of the connecting section 123 and the inner wall of the pen barrel shell 21 are fixedly connected by adhesive, which prevents the connecting section 123 from falling off from the pen barrel shell 21. This solves the problem of insufficient structural strength at the connection between the pen tip 1 and the pen barrel 2 in existing pen salinity meters, which makes them prone to breakage.

[0038] Furthermore, the structure in which the diameter of the connecting segment 123 gradually decreases in the axial direction away from the reinforcing segment 122 also allows the connecting segment 123 to be easily inserted into the mounting port 211.

[0039] Please see Figures 2 to 4 Furthermore, the pen head 1 also includes a temperature probe 13 and a conductive electrode 14, and the pen barrel 2 also includes a circuit board 22 disposed inside the pen barrel housing 21;

[0040] One end of the temperature probe 13 is fixedly embedded in the end of the detection section 121 away from the connecting section 123, and the other end of the temperature probe 13 protrudes from the pen tip housing 11 along the axial direction of the detection section 121; the inner circumferential side of the conductive electrode 14 is fixedly embedded in the outer circumferential wall of the detection section 121, and the outer circumferential wall surface of the conductive electrode 14 is exposed on the outer circumferential wall surface of the pen tip housing 11.

[0041] The temperature probe 13 and the conductive electrode 14 are respectively electrically connected to the circuit board 22;

[0042] The number of conductive electrodes 14 is two, and the two conductive electrodes 14 are arranged sequentially along the axial direction of the detection section 121.

[0043] By fixing the inner circumferential side of the conductive electrode 14 into the outer circumferential wall of the detection section 121, and fixing one end of the temperature probe 13 into the end of the detection section 121 away from the connecting section 123, it can be ensured that both the conductive electrode 14 and the temperature probe 13 are securely installed.

[0044] Please see Figures 2 to 4 Furthermore, the outer peripheral wall of the pen tip housing 11 is provided with a first opening 111 corresponding to the conductive electrode 14. The outer peripheral side of the conductive electrode 14 extends into the first opening 111 so that the outer peripheral wall surface of the conductive electrode 14 is exposed on the pen tip housing 11. The outer peripheral wall surface of the conductive electrode 14 is adapted to the outer peripheral wall surface of the pen tip housing 11.

[0045] The end of the pen tip housing 11 away from the pen barrel housing 21 is provided with a second opening 112 that matches the temperature probe 13. The end of the temperature probe 13 away from the detection section 121 passes through the second opening 112 and protrudes from the pen tip housing 11.

[0046] By fixing the inner circumferential side of the conductive electrode 14 into the outer circumferential wall of the detection section 121, and forming the first opening 111 in the pen tip housing 11 that matches the conductive electrode 14, the entire conductive electrode 14 is embedded in the pen tip housing 11. This ensures that the conductive electrode 14 is securely installed and avoids poor contact caused by vibration or movement, which could affect the detection accuracy. The outer circumferential wall surface of the conductive electrode 14 is adapted to the outer circumferential wall surface of the pen tip housing 11, which facilitates the contact between the conductive electrode 14 and the solution to be tested to achieve salinity detection. After the test is completed, the surface of the conductive electrode 14 can be easily cleaned.

[0047] Please see Figures 2 to 4Furthermore, the conductive electrode 14 includes an arc-shaped ring 141 and an arc-shaped protrusion 142. The inner circumferential side of the arc-shaped protrusion 142 is fixedly connected to the outer circumferential side of the arc-shaped ring 141, and the outer circumferential side of the arc-shaped protrusion 142 protrudes along the radial direction of the arc-shaped ring 141.

[0048] The outer peripheral wall of the detection section 121 is provided with an arc groove 1211 corresponding to the arc ring 141. The inner peripheral side of the arc ring 141 is embedded in the arc groove 1211, and the outer peripheral side of the arc ring 141 is embedded in the interior of the pen tip shell 11. The arc protrusion 142 extends into the first opening 111, and the outer peripheral wall surface of the arc protrusion 142 is flush with the outer peripheral wall surface of the pen tip shell 11.

[0049] The shape of the first opening 111 is adapted to the shape of the arc-shaped protrusion 142, and the number of the first opening 111 is equal to the number of the arc-shaped protrusion 142.

[0050] By setting the arc-shaped groove 1211, the conductive electrode 14 can be easily embedded in the arc-shaped groove 1211, which can fix the conductive electrode 14 and prevent the conductive electrode 14 from shifting in the axial direction. This will prevent the detection accuracy from being affected by the displacement of the conductive electrode 14 when the pen head 1 is inserted into the solution to be tested or when the solution to be tested is stirred.

[0051] To further clarify, the arc-shaped ring 141 and the arc-shaped protrusion 142 are integrally formed structures.

[0052] Specifically, the number of arc-shaped grooves 1211 corresponds one-to-one with the number of arc-shaped rings 141, that is, the number of arc-shaped grooves 1211 is equal to the number of conductive electrodes 14.

[0053] Please see Figure 2 Furthermore, the outer periphery of the arc-shaped ring 141 is fixedly connected to two arc-shaped protrusions 142, which are arranged symmetrically with respect to the arc-shaped ring 141.

[0054] Specifically, since each of the conductive electrodes 14 includes two arc-shaped protrusions 142, that is, the two conductive electrodes 14 include a total of four arc-shaped protrusions 142, the number of the first openings 111 is four, and the four first openings 111 are respectively arranged in a one-to-one correspondence with the four arc-shaped protrusions 142.

[0055] By setting two axisymmetric arc-shaped protrusions 142, when the pen tip 1 is inserted into the solution to be tested for measurement, the arc-shaped protrusion 142 on one side approaching or contacting the inner wall of the container will not affect the measurement of the solution to be tested by the arc-shaped protrusion 142 on the other side.

[0056] To further explain, the conductive electrode 14 is made of a precious metal that is resistant to salt and alkali. For example, the conductive electrode 14 can be a platinum electrode.

[0057] Furthermore, the pen head 1 also includes a lead wire tube, a probe lead wire, and an electrode lead wire;

[0058] Please see Figure 4 The detection section 121, the reinforcing section 122 and the connecting section 123 are provided with interconnected wire grooves 124 along the axial direction, and the end of the wire groove 124 away from the temperature probe 13 is connected to the interior of the pen barrel shell 21.

[0059] One end of the probe wire is connected to the temperature probe 13, and the other end of the probe wire passes through the wire groove 124 and enters the pen barrel housing 21 to connect with the circuit board 22. One end of the electrode wire is connected to the conductive electrode 14, and the other end of the electrode wire passes through the wire groove 124 and enters the pen barrel housing 21 to connect with the circuit board 22. The probe wire and the electrode wire are fitted with the wire tube, and the outer peripheral wall of the wire tube abuts against the inner peripheral wall of the wire groove 124.

[0060] It should be noted that the conduit, probe wire, and electrode wire are not shown in the figure. The conduit is used to protect the probe wire and the electrode wire; specifically, the conduit is a high-temperature resistant silicone sleeve.

[0061] Furthermore, the inner liner 12 (including the detection section 121, the reinforcing section 122, and the connecting section 123) of this invention is an integral structure formed with the temperature probe 13, the conductive electrode 14, the probe wire, the electrode wire, and the wire tube through an insert injection molding process. This ensures a stable connection between the temperature probe 13 and the inner liner 12, as well as a stable connection between the conductive electrode 14 and the inner liner 12. It prevents the temperature probe 13 or the conductive electrode 14 from shifting and affecting the detection accuracy when the pen tip 1 is inserted into the solution to be tested or when the solution to be tested is stirred.

[0062] Furthermore, the inner diameter of the conduit can be set as small as possible, as long as it is large enough to cover the probe wire and the electrode wire. The wire groove 124 is a structure that is naturally formed after injection molding and matches the shape of the conduit. This allows the inner liner 12 to have a larger radial thickness, thereby enhancing the radial strength of the inner liner 12. This helps to enhance the structural strength at the connection between the pen head 1 and the pen barrel 2, solving the problem that the connection between the pen head 1 and the pen barrel 2 is prone to breakage due to insufficient structural strength.

[0063] To further explain, the pen tip shell 11 is formed by injection molding. Specifically, the inner liner 12, the temperature probe 13, the conductive electrode 14, the probe wire, the electrode wire, and the wire tube are first integrated into a single structure through insert injection molding. Then, the pen tip shell 11 is formed by injection molding again, covering the outer surfaces of the detection section 121 and the reinforcing section 122. During the secondary injection molding process, the pen tip shell 11 naturally forms the first opening 111 and the second opening 112, so that a portion of the temperature probe 13 and the conductive electrode 14 are embedded in the pen tip shell 11. This improves the coverage between the pen tip shell 11 and the detection section 121, the reinforcing section 122, the temperature probe 13, and the conductive electrode 14, further preventing displacement of the temperature probe 13 or the conductive electrode 14 that could affect detection accuracy.

[0064] Furthermore, compared with existing detachable split-structure shells, the pen tip shell 11 of this utility model can reduce the risk of cracking: since the detachable split-structure shell uses multiple connection points (such as screws or buckles) to wrap and fix components such as the inner liner 12, temperature probe 13 and conductive electrode 14, gaps inevitably appear between the detachable split-structure shell and each component, and due to the large number of connection points, they are more likely to become stress concentration points, making them more prone to cracking when subjected to external forces or temperature changes (especially when measuring the salinity of brine solutions at high temperatures).

[0065] In the salinity meter of this invention, the pen tip housing 11 is integrally formed with the detection section 121, the reinforcing section 122, the temperature probe 13, and the conductive electrode 14 through injection molding. This results in no detachable (excluding violent disassembly) connection points on the pen tip housing 11, leading to a more uniform stress distribution. The pen tip housing 11 is also tightly fitted with the detection section 121 and the reinforcing section 122, as well as with the temperature probe 13 and the conductive electrode 14. This effectively improves the overall structural strength of the pen tip 1, reduces the risk of cracks in the pen tip housing 11, and makes the salinity meter of this invention suitable for measuring the salinity of brine solutions at higher temperatures.

[0066] To further clarify, the materials of the detection section 121, the reinforcing section 122, and the connecting section 123 are all POM (polyoxymethylene, also known as acetal resin, polyoxymethylene, polyacetal, a thermoplastic crystalline polymer, known as "super steel" or "acetal") material. POM material has relatively high strength, rigidity, and hardness, which can further enhance the structural strength and support strength of the inner liner 12 and avoid the problem of the pen tip 1 breaking.

[0067] Specifically, the temperature probe 13 and the conductive electrode 14 are first fixed onto the mold, and the probe wire and the electrode wire are wrapped with the high-temperature resistant conduit. Then, POM material is used for a first injection molding to form the inner liner 12 with the temperature probe 13 and the conductive electrode 14 embedded in it, ensuring the positional consistency of the temperature probe 13 and the conductive electrode 14. After standing for 48 hours, a second injection molding is performed to form the pen tip shell 11. The pen tip shell 11 is made of ABS resin (acrylonitrile-styrene-butadiene copolymer), for example, ABS777D material can be used to prepare the pen tip shell 11.

[0068] Please see Figure 2 and Figure 3 Furthermore, the outer peripheral wall of the connecting segment 123 has two dispensing grooves 1231, which are symmetrically arranged with respect to the plane containing the axis of the connecting segment 123.

[0069] By setting the dispensing grooves 1231, adhesives (glue, sealant, etc.) can be accurately injected into the dispensing grooves 1231, and the amount of adhesive injected is more easily controlled. Specifically, before the connecting segment 123 is inserted into the pen barrel shell 21 through the mounting port 211, adhesive can be dispensed into the two dispensing grooves 1231. When the connecting segment 123 is inserted into the mounting port 211, the adhesive fills the dispensing grooves 1231 and overflows, forming a continuous sealant layer between the outer peripheral wall of the connecting segment 123 and the inner wall of the pen barrel shell 21. This enhances the connection strength between the connecting segment 123 and the pen barrel shell 21, and also enhances the sealing performance between the connecting segment 123 and the pen barrel shell 21.

[0070] Furthermore, the two symmetrical dispensing grooves 1231 can also serve as fixing points. Specifically, when the pen head 1 is subjected to secondary injection molding to form the pen head shell 11, the inner liner 12, which has the temperature probe 13 and the conductive electrode 14 embedded in it, needs to be fixed in the mold of the pen head shell 11. At this time, the temperature probe 13 can be used as a fixing point at one end, and the two dispensing grooves 1231 can be used as fixing points at the other end. This ensures that the inner liner 12, the temperature probe 13, and the conductive electrode 14 are accurately positioned in the mold during injection molding, resulting in a uniform thickness of the pen head shell 11 after injection molding, which helps to improve the quality of the product.

[0071] Please see Figure 7 Furthermore, the pen barrel housing 21 is provided with a first cavity 212 and a second cavity 213 that are interconnected. The first cavity 212 and the second cavity 213 are arranged sequentially along the axial direction of the pen barrel housing 21, and the second cavity 213 is located at the end of the first cavity 212 away from the mounting port 211. The shape of the first cavity 212 matches the shape of the connecting section 123.

[0072] By setting the first cavity 212 and the second cavity 213, the shape of the first cavity 212 matches the shape of the connecting section 123. That is, the inner diameter of the first cavity 212 gradually decreases from the mounting port 211 to the second cavity 213 in the axial direction. In other words, the inner diameter of the first cavity 212 at the end near the mounting port 211 is greater than the end face diameter of the connecting section 123 away from the reinforcing section 122, so that the connecting section 123 can be easily inserted into the first cavity 212 from the mounting port 211.

[0073] Please see Figure 7 Furthermore, the pen barrel 2 also includes a bottom shell 24 and a battery 23 disposed in the second cavity 213. The battery 23 is provided with a charging interface 231 and is electrically connected to the circuit board 22.

[0074] Please see Figure 8 The pen barrel shell 21 has a first opening 214 at the end away from the mounting port 211. The battery 23 is disposed at the end of the second cavity 213 near the first opening 214. The bottom shell 24 is detachably covered by the first opening 214. The end face of the bottom shell 24 facing the first opening 214 has a charging opening 241. The end of the charging interface 231 away from the battery 23 extends into the charging opening 241.

[0075] The battery 23 can be a rechargeable battery, such as a lithium-ion battery. The charging interface 231 is a waterproof USB interface to prevent short circuits caused by water during use. By providing the first port 214 and the bottom shell 24, the bottom shell 24 is detachably covered by the first port 214, which facilitates charging and replacing the battery 23; specifically, the bottom shell 24 can be detachably connected to the pen barrel shell 21 through a snap-fit ​​structure.

[0076] Please see Figure 7 and Figure 8 Furthermore, the pen barrel 2 also includes a dust cover 25, which is movably connected to the bottom shell 24. The dust cover 25 is used to completely cover the charging opening 241 or expose the charging opening 241.

[0077] By providing the dust cover 25, the interior of the charging interface 231 and the pen barrel shell 21 can be protected, preventing dust or other impurities from entering the charging interface 231 and affecting the charging performance or the performance of the battery 23, and preventing dust or other impurities from entering the second cavity 213 through the charging opening 241 and affecting the battery 23 or the circuit board 22 and other components.

[0078] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A salinity meter, characterized in that, include: The pen head includes a pen head shell and an inner liner; the inner liner includes a detection section, a reinforcing section, and a connecting section connected in sequence; the diameter of the reinforcing section gradually increases from the detection section towards the connecting section in the axial direction, and the diameter of the connecting section gradually decreases in the axial direction away from the reinforcing section, and the diameter of the end face of the connecting section away from the reinforcing section is larger than the diameter of the detection section; the detection section, the reinforcing section, and the connecting section are integrally formed. The pen tip shell is fixedly covered on the outer surfaces of the detection section and the reinforcing section; The pen barrel includes a pen barrel shell, one end of which has a mounting opening. A connecting section is inserted into the pen barrel shell through the mounting opening. The outer peripheral wall of the connecting section is glued to the inner wall of the pen barrel shell. The end face of the pen barrel shell facing the pen tip shell abuts against the pen tip shell.

2. The salinity meter according to claim 1, characterized in that, The pen head also includes a temperature probe and conductive electrodes, and the pen barrel also includes a circuit board disposed inside the pen barrel housing; One end of the temperature probe is fixedly embedded in the end of the detection segment away from the connecting segment, and the other end of the temperature probe protrudes from the pen tip housing along the axial direction of the detection segment; the inner circumferential side of the conductive electrode is fixedly embedded in the outer circumferential wall of the detection segment, and the outer circumferential wall surface of the conductive electrode is exposed on the outer circumferential wall surface of the pen tip housing. The temperature probe and the conductive electrode are electrically connected to the main circuit board, respectively. The number of conductive electrodes is two, and the two conductive electrodes are arranged sequentially along the axial direction of the detection section.

3. The salinity meter according to claim 2, characterized in that, The outer peripheral wall of the pen tip housing is provided with a first opening corresponding to each of the conductive electrodes. The outer peripheral side of the conductive electrode extends into the first opening so that the outer peripheral wall surface of the conductive electrode is exposed outside the pen tip housing. The outer peripheral wall surface of the conductive electrode is adapted to the outer peripheral wall surface of the pen tip housing. The end of the pen tip housing away from the pen barrel housing is provided with a second opening that matches the temperature probe. The end of the temperature probe away from the detection section passes through the second opening and protrudes from the pen tip housing.

4. The salinity meter according to claim 3, characterized in that, The conductive electrode includes an arc-shaped ring and an arc-shaped protrusion. The inner circumferential side of the arc-shaped protrusion is fixedly connected to the outer circumferential side of the arc-shaped ring, and the outer circumferential side of the arc-shaped protrusion protrudes along the radial direction of the arc-shaped ring. The outer peripheral wall of the detection section is provided with an arc groove corresponding to the arc ring. The inner peripheral side of the arc ring is embedded in the arc groove, and the outer peripheral side of the arc ring is embedded in the interior of the pen tip shell. The arc protrusion extends into the first opening, and the outer peripheral wall surface of the arc protrusion is flush with the outer peripheral wall surface of the pen tip shell. The shape of the first opening matches the shape of the arc-shaped protrusion, and the number of the first openings is equal to the number of the arc-shaped protrusions.

5. The salinity meter according to claim 4, characterized in that, Two arc-shaped protrusions are fixedly connected to the outer periphery of the arc-shaped ring, and the two arc-shaped protrusions are arranged symmetrically with respect to the arc-shaped ring axis.

6. The salinity meter according to claim 3, characterized in that, The pen head also includes a lead tube, a probe lead wire, and an electrode lead wire; The detection section, the reinforcing section, and the connecting section are provided with interconnected wire grooves along the axial direction, and the end of the wire groove away from the temperature probe is connected to the inside of the pen barrel shell. One end of the probe wire is connected to the temperature probe, and the other end of the probe wire passes through the wire groove and enters the pen barrel housing to connect with the circuit board. One end of the electrode wire is connected to the conductive electrode, and the other end of the electrode wire passes through the wire groove and enters the pen barrel housing to connect with the circuit board. The probe wire and the electrode wire are fitted with the wire tube, and the outer peripheral wall of the wire tube abuts against the inner peripheral wall of the wire groove.

7. The salinity meter according to claim 3, characterized in that, Two adhesive grooves are formed on the outer peripheral wall of the connecting segment, and the two adhesive grooves are symmetrically arranged with respect to the plane containing the axis of the connecting segment.

8. The salinity meter according to claim 2, characterized in that, The pen barrel shell has a first cavity and a second cavity that are interconnected inside. The first cavity and the second cavity are arranged sequentially along the axial direction of the pen barrel shell, and the second cavity is located at the end of the first cavity away from the mounting port. The shape of the first cavity matches the shape of the connecting section.

9. The salinity meter according to claim 8, characterized in that, The pen barrel also includes a bottom shell and a battery disposed in the second cavity. The battery is provided with a charging interface and is electrically connected to the circuit board. The pen barrel shell has a first opening at the end away from the mounting port. The battery is disposed at the end of the second cavity near the first opening. The bottom shell is detachably covered by the first opening. The end face of the bottom shell facing the first opening has a charging opening. The end of the charging interface away from the battery extends into the charging opening.

10. The salinity meter according to claim 9, characterized in that, The pen barrel also includes a dust cover, which is movably connected to the bottom shell. The dust cover is used to completely cover the charging opening or expose the charging opening.

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