Water quality monitoring test pen with telescopic probe

By designing a retractable probe structure on the water quality monitoring test pen, the problems of probe leakage leading to damage and impurity adhesion are solved, thus achieving probe protection and accuracy of measurement results.

CN224203118UActive Publication Date: 2026-05-05KERUN (WUHAN) INTELLIGENT TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
KERUN (WUHAN) INTELLIGENT TECHNOLOGY CO LTD
Filing Date
2025-06-18
Publication Date
2026-05-05

AI Technical Summary

Technical Problem

When the probe of a water quality monitoring test pen is in use or not in use, it is exposed and easily damaged by impact and can attract impurities, affecting the accuracy of the measurement results.

Method used

A retractable probe water quality monitoring test pen was designed. By setting guide grooves, a first positioning groove and a second positioning groove on the protective cover, and using retractable positioning protrusions, the probe can be extended when in use and retracted into the protective cover when not in use, thus avoiding collisions and the adhesion of impurities.

Benefits of technology

It effectively protects the probe from external impact damage, keeps the probe clean, and ensures the accuracy of measurement results.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model particularly relates to a water quality monitoring test pen with a telescopic probe. A guide part is arranged on the inner wall of the circumferential face of a protective cover of the test pen and comprises a guide groove, a first positioning groove and a second positioning groove, the depth of the first positioning groove and the depth of the second positioning groove are larger than that of the guide groove, one axial end of the protective cover is open, and an elastic hole is formed in the other axial end of the protective cover. A probe is arranged at the monitoring end of the monitoring main body, the monitoring end of the monitoring main body is inserted into the protective cover from one axial end of the protective cover, a telescopic positioning bulge is arranged on the circumferential surface of the main body, and the positioning bulge is arranged in the first positioning groove and the second positioning groove in a switchable manner. The technical problem that the probe is damaged due to the fact that the probe collides with external components can be solved through the protective cover, impurities can be prevented from being attached to the surface of the probe, and the accuracy of a probe measurement result is prevented from being affected.
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Description

Technical Field

[0001] This application belongs to the field of environmental monitoring technology, specifically relating to a retractable probe water quality monitoring test pen. Background Technology

[0002] In related technologies, water quality monitoring test pens have probes, but the probes are always exposed whether in use or not. When carried, the probes may collide with external components, which may damage the probes and affect the measurement results. Summary of the Invention

[0003] This application provides a water quality monitoring device that aims to at least partially prevent the probe from colliding with external components, causing damage to the probe and affecting the measurement results.

[0004] The technical solution of this application is: a retractable probe water quality monitoring test pen, the test pen comprising: a protective cover, a guide portion formed on the inner wall of the protective cover, the guide portion including a guide groove, a first positioning groove and a second positioning groove, the guide groove being formed along the axial direction of the protective cover, the first positioning groove and the second positioning groove being respectively disposed at both ends of the guide groove and communicating with the guide groove, the depth of the first positioning groove and the second positioning groove being greater than the depth of the guide groove, one axial end of the protective cover being open, and an elastic hole formed at the other axial end of the protective cover; a monitoring body, provided with a monitoring end, ... The monitoring end is equipped with a probe. The monitoring end of the monitoring body is inserted into the protective cover from one axial end. The peripheral surface of the body is provided with a retractable positioning protrusion, which can be switched between being located in the first positioning groove and the second positioning groove. When the positioning protrusion is located in the first positioning groove, the probe on the monitoring end is located inside the protective cover, and the elastic hole is in a closed state. When the positioning protrusion is located in the second positioning groove, at least a portion of the probe on the monitoring end passes through the elastic hole at the other axial end of the protective cover and is located outside the protective cover.

[0005] The retractable probe water quality monitoring pen provided in this application, when in use, operates the monitoring body, with the positioning protrusion on the monitoring body positioned in the second positioning groove. At least a portion of the probe on the monitoring end passes through the elastic hole at the other end of the protective cover along the axial direction and is located outside the protective cover, allowing the user to monitor water data. When not in use, operates the monitoring body, with the positioning protrusion on the monitoring body positioned in the first positioning groove. The probe on the monitoring end is located inside the protective cover, and the elastic hole is in a closed state, placing the probe in a sealed environment. This design not only avoids the technical problem of probe damage caused by collisions with external components through the protective cover, but also prevents impurities from adhering to the probe surface, thus avoiding affecting the accuracy of the probe measurement results.

[0006] In some implementations, the first positioning groove and the second positioning groove are transitioned by a slope at one end facing the guide groove.

[0007] In some implementations, multiple guide portions are provided circumferentially around the protective cover, and the positioning protrusions are provided one-to-one with the guide portions, with the positioning protrusions slidably disposed within the corresponding guide portions.

[0008] In some implementations, the monitoring body has an assembly groove on its circumference, and the assembly groove and the positioning protrusion are arranged in a one-to-one correspondence. The positioning protrusion is movably disposed in the assembly groove, and a first elastic element is provided between the inner end of the positioning protrusion and the bottom of the assembly groove. The outer end of the positioning protrusion can extend out of the circumference of the monitoring body.

[0009] In some embodiments, the test pen further includes a second elastic element, fitted onto the monitoring body and located between the positioning protrusion and the other axial end of the protective cover.

[0010] In some implementations, multiple probes are provided, and the elastic holes and probes are provided in a one-to-one correspondence, with the probes able to pass through the corresponding elastic holes.

[0011] In some embodiments, at least a portion of the other axial end of the protective cover is resilient, and the resilient hole is formed in the resilient portion at the other axial end of the protective cover.

[0012] In some implementations, the test pen further includes a cap that is threadedly connected to the other axial end of the protective cover.

[0013] In some embodiments, the test pen further includes at least one of a display, a speaker, and an indicator light, all of which are integrated on the monitoring body and located outside the protective cover. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the structure of a retractable probe water quality monitoring test pen according to one or more embodiments of this application is shown;

[0016] Figure 2 It shows Figure 1 A diagram showing the view from below;

[0017] Figure 3 It shows Figure 2 A schematic diagram of the AA cross-section;

[0018] Figure 4 A front view schematic diagram of the retractable probe water quality monitoring test pen is shown;

[0019] Figure 5 A schematic diagram of the monitoring body 100 is shown;

[0020] Figure 6 It shows Figure 5 Another structural diagram from another perspective;

[0021] Figure 7 It shows Figure 5 A cross-sectional schematic diagram;

[0022] Figure 8 A cross-sectional view of the protective cover 200 is shown.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100. Monitoring body; 110. Monitoring end; 120. Probe; 130. Positioning protrusion; 140. Handheld end; 150. Assembly slot; 160. First elastic element; 170. Second elastic element;

[0025] 200. Protective cover; 210. Guide section; 211. First positioning groove; 212. Second positioning groove; 213. Guide groove; 214. Inclined surface; 220. Elastic hole;

[0026] 300. Monitor;

[0027] 400. Speaker;

[0028] 500, Indicator. Detailed Implementation

[0029] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] Water resources play an indispensable role in daily life and industrial production. Among these efforts, monitoring water resources is an essential part of water pollution prevention and control.

[0031] In related technologies, operators use water quality monitoring test pens to monitor water bodies in real time. However, the probe is always exposed, whether in use or idle. When carrying the probe, it may collide with external components, which may damage the probe. In addition, impurities may be adsorbed on the surface of the exposed probe, which will affect the measurement results of the probe.

[0032] Based on the above-mentioned technical problems, this application provides a water quality monitoring device, which aims to at least to some extent avoid the probe from colliding with external components, causing damage to the probe and affecting the measurement results of the probe.

[0033] Figure 1 A schematic diagram of the retractable probe water quality monitoring test pen according to one or more embodiments of this application is shown. Figure 2 It shows Figure 1 A diagram showing the view from below. Figure 3 It shows Figure 2 A schematic diagram of the AA cross-section. Combined with... Figures 1-3 The retractable probe water quality monitoring test pen provided in this application includes a protective cover 200 and a monitoring body 100. A guide portion 210 is provided on the inner wall of the circumferential surface of the protective cover 200. The guide portion 210 includes a guide groove 213, a first positioning groove 211, and a second positioning groove 212. The guide groove 213 is opened along the axial direction of the protective cover 200. The first positioning groove 211 and the second positioning groove 212 are respectively located at both ends of the guide groove 213 and communicate with it. The depth of the first positioning groove 211 and the second positioning groove 212 is greater than the depth of the guide groove 213. One axial end of the protective cover 200 is open, and the other axial end of the protective cover 200 has an elastic hole 220. The monitoring body 100 is provided with a monitoring end 110. A probe 120 is provided on the monitoring end 110. The monitoring end 110 of the monitoring body 100 is inserted into the protective cover 200 from one axial end. A retractable positioning protrusion 130 is provided on the circumferential surface of the body. The positioning protrusion 130 can be switched between being located in the first positioning groove 211 and the second positioning groove 212. When the positioning protrusion 130 is located in the first positioning groove 211, the probe 120 on the monitoring end 110 is located inside the protective cover 200, and the elastic hole 220 is in a closed state. When the positioning protrusion 130 is located in the second positioning groove 212, at least a portion of the probe 120 on the monitoring end 110 passes through the elastic hole 220 at the other axial end of the protective cover 200 and is located outside the protective cover 200.

[0034] The retractable probe water quality monitoring pen provided in this application, when in use, operates the monitoring body 100, with the positioning protrusion 130 on the monitoring body 100 positioned in the second positioning groove 212. At least a portion of the probe 120 on the monitoring end 110 passes through the elastic hole 220 at the other axial end of the protective cover 200 and is located outside the protective cover 200, allowing the user to monitor water data. When not in use, operates the monitoring body 100, with the positioning protrusion 130 on the monitoring body 100 positioned in the first positioning groove 211. The probe 120 on the monitoring end 110 is located inside the protective cover 200, and the elastic hole 220 is closed, placing the probe 120 in a sealed environment. This configuration not only avoids the technical problem of probe 120 being damaged by collisions with external components through the protective cover 200, but also prevents impurities from adhering to the probe 120 surface, thus avoiding affecting the accuracy of the probe 120 measurement results.

[0035] Figure 4 This shows a front view schematic diagram of the retractable probe water quality monitoring test pen, combined with... Figure 4 For ease of description, we define the retractable probe water quality monitoring test pen as having a height direction, which is defined as follows: Figure 3 As shown in the vertical direction, that is, the guide groove 213 is set vertically, the first positioning groove 211 is located above the guide groove 213, and the second positioning groove 212 is located below the guide groove 213. By operating the monitoring body 100, the monitoring body 100 can be raised and lowered vertically within the protective cover 200. The specific details of the retractable probe water quality monitoring test pen are further described below with reference to the accompanying drawings.

[0036] Figure 5 A schematic diagram of the monitoring body 100 is shown. Figure 6 It shows Figure 5 A structural diagram from another perspective. Combined with... Figure 5 as well as Figure 6The monitoring body 100 of this application is generally a hollow cylindrical structure. The monitoring body 100 includes a handheld end 140 and a monitoring end 110, with the handheld end 140 located above and the monitoring end 110 below. The handheld end 140 is positioned outside the protective cover 200 for easy gripping by the user. The monitoring body 100 contains a power supply, circuit board, and other components for monitoring by the probe 120. One side of the handheld end 140 is flat, and a display 300 is integrated on this flat surface to display the water data monitored by the probe 120. Additionally, a speaker 400 can be installed on the top of the handheld end 140 to broadcast the water data monitored by the probe 120. Furthermore, an indicator 500, which can be a signal light, can be installed on the other side of the handheld end 140 to display the pH value information of the water monitored by the probe 120. The arrangement of the display 300, speaker 400 and indicator 500 makes reasonable use of the space of the monitoring body 100 and minimizes the size of the product.

[0037] It should be noted that the display 300, speaker 400, and indicator 500 in this application may only have one of them. The display 300, speaker 400, and indicator are all integrated on the monitoring body 100 and located on the outside of the protective cover 200. The specific configuration can be adjusted according to actual needs, and will not be elaborated here.

[0038] Combination Figure 5 as well as Figure 6 In some embodiments, multiple probes 120 can be provided, integrated into the detection end of the monitoring body 100. Each probe 120 includes a pressure sensor, a temperature sensor, a pH electrode, and a residual chlorine electrode to monitor corresponding water quality parameters. Specifically, the pressure sensor monitors the real-time pressure of the water, the temperature sensor monitors the real-time temperature, the pH electrode monitors the real-time pH, and the residual chlorine electrode monitors the real-time residual chlorine content. In a specific implementation, the monitoring end 110 of the monitoring body 100 is equipped with a carbon substrate, which can be 30mm × 30mm in size. Multiple sensor arrays are arranged on the carbon substrate using MEMS technology.

[0039] It should be noted that in some embodiments, the monitoring end 110 of the monitoring subject 100 may integrate the above four types of probes 120, or may only integrate at least one type of probe 120. The specific design can be customized according to the requirements, which will not be elaborated here.

[0040] In some embodiments, Figure 7 It shows Figure 5 A cross-sectional schematic diagram. Combined with... Figure 7In some embodiments, the monitoring body 100 has an assembly groove 150 on its circumferential surface. The assembly groove 150 and the positioning protrusion 130 are arranged in a one-to-one correspondence. The positioning protrusion 130 is movably disposed in the assembly groove 150. A first elastic member 160 is provided between the inner end of the positioning protrusion 130 and the bottom of the assembly groove 150. The outer end of the positioning protrusion 130 can extend out of the circumferential surface of the monitoring body 100. Without external force, the positioning protrusion 130 protrudes from the circumferential surface of the monitoring body 100 under the support of the first elastic member 160 and is located in the first positioning groove 211 or the second positioning groove 212, thereby keeping the monitoring body 100 and the protective cover 200 relatively fixed. When the monitoring body 100 is operated, during the process of the monitoring body 100 moving from the first positioning groove 211 to the guide groove 213, or during the process of moving from the second positioning groove 212 to the guide groove 213, the positioning protrusion 130 moves into the assembly groove 150 under the action of the inner wall of the protective cover 200, and compresses the first elastic member 160, thereby allowing the positioning protrusion 130 to move into the guide groove 213 and move along the guide groove 213 to the first positioning groove 211 or the second positioning groove 212.

[0041] In specific implementation, the positioning protrusion 130 is a rod structure that is adapted to the assembly groove 150. The outer end of the positioning protrusion 130 is spherical so that the positioning protrusion 130 can move smoothly from the first positioning groove 211 or the second positioning groove 212 to the guide groove 213. The first elastic element 160 is a spring, which is disposed between the inner end of the positioning protrusion 130 and the bottom of the assembly groove 150.

[0042] In another embodiment, the positioning protrusion 130 may also be elastic, for example, it may be made of an elastic material and vulcanized on the peripheral surface of the monitoring body 100.

[0043] Figure 8 A cross-sectional view of the protective shield 200 is shown. (Combined with...) Figure 8 In some embodiments, the depths of the first positioning groove 211 and the second positioning groove 212 are both greater than the depth of the guide groove 213, so that when the positioning protrusion 130 moves from the guide groove 213 to the first positioning groove 211 or the second positioning groove 212, the first elastic member 160 is in a state of restoring deformation, so that the positioning protrusion 130 abuts against the bottom of the first positioning groove 211 or the second positioning groove 212, thereby fixing the monitoring body 100 and the protective cover 200 together, so that the probe 120 is kept inside the protective cover 200, or at least a portion of the probe 120 extends out of the protective cover 200.

[0044] Combination Figure 8Furthermore, the ends of the first positioning groove 211 and the second positioning groove 212 facing the guide groove 213 are transitioned by an inclined surface 214. This arrangement allows the positioning protrusion 130 to move smoothly from the first positioning groove 211 or the second positioning groove 212 into the guide groove 213. As for the slope of the inclined surface 214, it can be set according to the actual situation, and this application does not impose any restrictions on it.

[0045] In one embodiment, the length of the guide groove 213 is slightly less than the length of the probe 120. When the positioning protrusion 130 is in the first positioning groove 211, the probe 120 is inside the protective cover 200. When the positioning protrusion 130 moves along the guide groove 213 to the second positioning groove 212, the monitoring end 110 of the monitoring body 100 can have a certain gap with the other axial end of the protective cover 200, providing assembly space for the setting of the second elastic element described below. In another embodiment, the length of the guide groove 213 can also be equal to the length of the probe 120. When the positioning protrusion 130 is in the first positioning groove 211, the probe 120 is inside the protective cover 200. When the positioning protrusion 130 moves along the guide groove 213 to the second positioning groove 212, the monitoring end 110 of the monitoring body 100 abuts against the other axial end of the protective cover 200.

[0046] It should be noted that the guide portion 210 of this application is provided with multiple circumferentially spaced portions around the protective cover 200, and the positioning protrusions 130 are provided one-to-one with the guide portion 210, with the positioning protrusions 130 slidably disposed within the corresponding guide portion 210. This arrangement can ensure that the force on the monitoring body 100 is balanced, avoiding excessive friction between the monitoring body 100 and the protective cover 200, which would affect the movement of the monitoring body 100 relative to the protective cover 200.

[0047] Combination Figure 3 In some embodiments, the test pen further includes a second elastic element 170, which is sleeved on the monitoring body 100 and located between the positioning protrusion 130 and the other axial end of the protective cover 200. When the positioning protrusion 130 is in the first positioning groove 211, the probe 120 is inside the protective cover 200, and the second elastic element 170 is in a naturally extended state. When the positioning protrusion 130 moves along the guide groove 213 to the second positioning groove 212, the second elastic element 170 is in and remains in a compressed state. When the positioning protrusion 130 moves from the second positioning groove 212 to the guide groove 213, the second elastic element 170 recovers its deformation, driving the monitoring body 100 to move upward until the positioning protrusion 130 moves into the first positioning groove 211. This configuration improves the user's feel when operating the monitoring body 100, making the test pen a flexible pen. In specific implementation, the second elastic element 170 is a spring, the top end of which is connected to the circumferential surface of the monitoring body 100 and close to the positioning protrusion 130, and the lower end of which is connected to the inner side of one axial end of the protective cover 200.

[0048] Combination Figure 2 In some embodiments, since multiple probes 120 are provided, the elastic holes 220 and probes 120 are respectively provided in a one-to-one correspondence, and the probes 120 can pass through the corresponding elastic holes 220.

[0049] In some implementations, at least a portion of the other axial end of the protective cover 200 is elastic, and an elastic hole 220 is formed on the elastic portion of the other axial end of the protective cover 200. When the positioning protrusion 130 is in the first positioning groove 211, the probe 120 is inside the protective cover 200, and the elastic hole 220 is in a closed state. When the positioning protrusion 130 moves along the guide groove 213 to the second positioning groove 212, the probe 120 opens the corresponding elastic hole 220 so that at least a portion of the probe 120 extends out of the other axial end of the protective cover 200 for testing water.

[0050] It should be noted that the statement that at least part of the other axial end of the protective cover 200 is elastic in this application means that the other axial end of the protective cover 200 is elastic, or that the other axial end of the protective cover 200 is elastic only at the location where the elastic hole 220 is provided. This application does not impose any restrictions on this.

[0051] In some embodiments, the test pen further includes a cap (not shown), which is threaded to the other axial end of the protective cover 200. The cap can seal the elastic hole 220 to prevent impurities from adhering to the surface of the probe 120 through the elastic hole 220, thereby improving the accuracy of the test data of the probe 120.

[0052] When using the retractable probe water quality monitoring pen provided in this application, first remove the nut, then press the monitoring body 100 until the monitoring end 110 of the monitoring body 100 extends out of the protective cover 200. The user can then release the monitoring body 100 to monitor and obtain water data through the probe 120. After monitoring is complete, the user holds the protective cover 200 with one hand and pulls the monitoring body 100 upwards with the other hand. The probe 120 of the monitoring end 110 of the monitoring body 100 will then retract into the protective cover 200, preventing the probe 120 from colliding with external components and causing damage.

[0053] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0054] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0055] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable 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 communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0056] Furthermore, the use of terms such as "first" and "second" in this application is 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 one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0057] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A retractable probe water quality monitoring test pen, characterized in that, The test pen includes: A protective cover has a guide portion on its inner circumferential wall. The guide portion includes a guide groove, a first positioning groove, and a second positioning groove. The guide groove is opened along the axial direction of the protective cover. The first positioning groove and the second positioning groove are respectively located at both ends of the guide groove and communicate with the guide groove. The depth of the first positioning groove and the second positioning groove is greater than the depth of the guide groove. One axial end of the protective cover is open, and the other axial end of the protective cover has an elastic hole. The monitoring body is equipped with a monitoring end, on which a probe is mounted. The monitoring end of the monitoring body is inserted into the protective cover from one axial end. The peripheral surface of the monitoring body is provided with a retractable positioning protrusion, which can be switched between being positioned in a first positioning groove and a second positioning groove. When the positioning protrusion is located in the first positioning groove, the probe on the monitoring end is located inside the protective cover, and the elastic hole is in a closed state; When the positioning protrusion is located in the second positioning groove, at least a portion of the probe on the monitoring end passes through the elastic hole at the other axial end of the protective cover and is located outside the protective cover.

2. The retractable probe water quality monitoring test pen according to claim 1, characterized in that, The first positioning groove and the second positioning groove are transitioned by an inclined surface at one end facing the guide groove.

3. The retractable probe water quality monitoring test pen according to claim 1, characterized in that, The guide portion is provided in multiple circumferentially around the protective cover, and the positioning protrusion is provided in a one-to-one correspondence with the guide portion. The positioning protrusion is slidably disposed in the corresponding guide portion.

4. The retractable probe water quality monitoring test pen according to any one of claims 1-3, characterized in that, The monitoring body has an assembly groove on its circumference. The assembly groove and the positioning protrusion are arranged in a one-to-one correspondence. The positioning protrusion is movably disposed in the assembly groove. A first elastic element is provided between the inner end of the positioning protrusion and the bottom of the assembly groove. The outer end of the positioning protrusion can extend out of the circumference of the monitoring body.

5. The retractable probe water quality monitoring test pen according to any one of claims 1-3, characterized in that, The test pen also includes: The second elastic element is sleeved on the monitoring body and located between the positioning protrusion and the other end of the protective cover along the axial direction.

6. The retractable probe water quality monitoring test pen according to any one of claims 1-3, characterized in that, The probe is provided in multiple ways, and the elastic hole and the probe are respectively provided one-to-one, and the probe can pass through the corresponding elastic hole.

7. The retractable probe water quality monitoring test pen according to any one of claims 1-3, characterized in that, At least a portion of the other axial end of the protective cover is elastic, and the elastic hole is formed in the elastic portion of the other axial end of the protective cover.

8. The retractable probe water quality monitoring test pen according to any one of claims 1-3, characterized in that, The test pen also includes: The cap body is threadedly connected to the other axial end of the protective cover.

9. The retractable probe water quality monitoring test pen according to any one of claims 1-3, characterized in that, The test pen also includes at least one of a display, a speaker, and an indicator light, all of which are integrated on the monitoring body and located outside the protective cover.