Portable telescopic TDS water quality detection pen

Abstract

The utility model relates to a portable telescopic TDS (total dissolved solids) water quality detection pen, which belongs to the technical field of water quality detection, and comprises a shell mechanism, a detection mechanism, a circuit board and a battery bin, and the shell mechanism consists of a pen body shell, a probe front cover and a battery rear cover; a telescopic mechanism is arranged on the detection mechanism and comprises a sliding button fixedly connected with the detection mechanism and a sliding rail fixed to the inner wall of the pen body shell, and a sliding block on the detection mechanism is matched with a sliding groove in the sliding rail to achieve probe stretching. The circuit board is mounted in the pen body shell through a fixing card; a second metal terminal at the front part of the circuit board is in contact with a first metal terminal at the rear part of the detection mechanism for conduction; a button battery is arranged in the battery compartment, and a connecting card is arranged outside; the probe front cover is fixed through a clamping point of the buckle; the display screen and the keys are connected with the circuit board.

Description

Technical Field

[0001] The utility model belongs to the technical field of water quality detection, and in particular relates to a portable and retractable TDS water quality detection pen. Background Art

[0002] Traditional portable, retractable TDS water quality test pens typically utilize a fixed probe design, making it susceptible to contamination and physical damage from prolonged exposure. Furthermore, the probe's large size makes it difficult to carry. Some products attempt to address this issue with detachable structures, but frequent disassembly and assembly can easily lead to poor connections or component loss. Furthermore, the circuit board mounting system of existing test pens is susceptible to vibration and displacement, affecting the stability of the electrode connection. Furthermore, the outer casing lacks effective dust protection, allowing dust to easily penetrate the internal circuitry through gaps in the buttons, reducing device reliability.

[0003] In the prior art, there is a TDS water quality test pen with announcement number CN222529271U. The circuit board is fixed inside the pen-shaped body of the test pen, and a power supply consisting of a battery cover, a battery holder and a button battery is installed at the tail. A probe with a metal probe is provided at the front end, and the probe is welded to the circuit board through the metal terminal; a display opening and a button opening are provided on the side wall of the body; a probe cap is provided on the outside of the probe, and a sealing ring is provided inside; the battery installation direction is prevented from reverse installation by the cooperation of a positioning inclined wall and a limiting rib; however, the probe is a fixed structure, without a telescopic protection mechanism, and the metal terminal and the probe are fixed by welding, and the overall structure lacks a telescopic guide mechanism, resulting in the probe being unable to be extended when in use or retracted when stored, resulting in insufficient portability and protection. Utility Model Content

[0004] The technical problem solved by the utility model is to overcome the defects in the prior art and provide a portable and retractable TDS water quality detection pen.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] The portable retractable TDS water quality testing pen of the utility model comprises a shell mechanism, which comprises a pen body shell, a probe front cover and a battery rear cover. A detection mechanism, a circuit board and a battery compartment are arranged inside the pen body shell. A retractable mechanism is arranged on the detection mechanism, which comprises a sliding button and a sliding rail. The sliding button is fixedly connected to one side of the detection mechanism, and a slider is provided on the other side of the detection mechanism. A sliding groove is provided in the middle of the sliding rail. The slider cooperates with the sliding groove, and the sliding rail is fixedly arranged on the inner wall of the pen body shell.

[0007] A through hole is provided on one side of the pen body shell, and the sliding button is fixedly connected to the detection mechanism through the through hole. A plurality of fixing cards are provided on the inner wall of the pen body shell, and the circuit board is fixed inside the pen body shell through the fixing cards.

[0008] A dustproof plate is provided between the through hole and the detection mechanism. The dustproof plate is fixedly connected to the sliding button and is closely attached to the inner wall of the pen body shell.

[0009] The front of the detection mechanism is provided with a probe, the rear is provided with a first metal terminal and a circuit board avoidance groove, the front of the circuit board is provided with a second metal terminal, and the first metal terminal matches the second metal terminal.

[0010] A connection card is provided on the outside of the battery compartment, electrodes are provided on both sides of the inside of the battery compartment, and a number of button batteries are provided between the electrodes. The battery back cover matches the battery compartment.

[0011] The front part of the pen body shell is provided with a buckle, the center of the buckle is provided with a through hole, both sides of the buckle are provided with card points, the card points match with the front cover of the probe, and the detection mechanism moves in the through hole.

[0012] It also includes a display screen and a plurality of buttons, and the display screen and the buttons are electrically connected to the circuit board.

[0013] The utility model has the following beneficial effects:

[0014] 1. The telescopic mechanism cooperates with the slide groove on the slide rail through the slider. Pushing the slide button can retract the probe into the pen body to avoid damage to the probe during transportation or idle. The probe can be extended and retracted with the slide button, extending during detection and retracting during storage, avoiding long-term exposure of the probe and improving measurement accuracy and service life.

[0015] 2. The sliding button directly drives the detection mechanism through the through hole, which is simple to assemble; the fixing card allows the circuit board to be installed without screws, reducing assembly time and cost.

[0016] 3. The dustproof plate covers the gap between the through hole and the detection mechanism, preventing dust from entering the detection mechanism and affecting the detection quality. The dustproof plate close to the inner wall moves synchronously with the button, effectively preventing dust and water vapor from entering the shell through the through hole, thereby improving electrical reliability.

[0017] 4. The first metal terminal and the second metal terminal are in elastic contact to ensure the conductive stability of the probe and the circuit board. The detection mechanism and the circuit board are connected with plug-in metal terminals, which are easy to disassemble and assemble, with stable signal transmission and easy maintenance.

[0018] 5. The buckle is detachably connected to the front cover through the card point. The front cover can be disassembled and assembled repeatedly, which is convenient for cleaning the probe and internal channels.

[0019] 6. The display screen and buttons intuitively display the TDS value and working status. The buttons can realize the detection and calibration functions, which improves the human-computer interaction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the utility model with the front cover of the probe removed;

[0022] Figure 3 This is a schematic diagram of the internal structure of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the testing mechanism from the first perspective;

[0024] Figure 5 This is a schematic diagram of the structure of the detection mechanism from the second perspective;

[0025] Figure 6 Schematic diagram of the circuit board structure;

[0026] Figure 7 This is a schematic diagram of the battery compartment structure;

[0027] Figure 8 Schematic diagram of the slide rail structure;

[0028] Figure 9 Schematic diagram of the buckle structure.

[0029] Among them: 1. Shell mechanism; 101. Pen body shell; 102. Probe front cover; 103. Battery back cover; 104. Through hole; 105. Fixing card; 2. Detection mechanism; 201. Probe; 202. First metal terminal; 203. Circuit board avoidance groove; 204. Slider; 3. Circuit board; 301. Second metal terminal; 4. Battery compartment; 401. Connection card; 402. Electrode; 403. Button battery; 501. Sliding button; 502. Slide rail; 503. Slide groove; 504. Dustproof plate; 6. Buckle; 601. Through hole; 602. Card point; 7. Display screen; 8. Button. DETAILED DESCRIPTION

[0030] like Figures 1 to 9 As shown, the portable retractable TDS water quality detection pen described in the utility model comprises a shell mechanism 1, which comprises a pen body shell 101, a probe front cover 102 and a battery back cover 103. The interior of the pen body shell 101 is provided with a detection mechanism 2, a circuit board 3 and a battery compartment 4. The detection mechanism 2 is provided with a retractable mechanism, which comprises a sliding button 501 and a slide rail 502. The sliding button 501 is fixedly connected to one side of the detection mechanism 2, and a slider 204 is provided on the other side of the detection mechanism 2. A slide groove 503 is provided in the middle of the slide rail 502. The slider 204 cooperates with the slide groove 503, and the slide rail 502 is fixedly set on the inner wall of the pen body shell 101.

[0031] A through hole 104 is provided on one side of the pen body shell 101 , and the sliding button 501 is fixedly connected to the detection mechanism 2 through the through hole 104 . A plurality of fixing cards 105 are provided on the inner wall of the pen body shell 101 , and the circuit board 3 is fixed inside the pen body shell 101 through the fixing cards 105 .

[0032] A dustproof plate 504 is provided between the through hole 104 and the detection mechanism 2 . The dustproof plate 504 is fixedly connected to the sliding button 501 and is in close contact with the inner wall of the pen body housing 101 .

[0033] The detection mechanism 2 is provided with a probe 201 at the front, a first metal terminal 202 and a circuit board avoidance groove 203 at the rear, and a second metal terminal 301 is provided at the front of the circuit board 3. The first metal terminal 202 cooperates with the second metal terminal 301.

[0034] A connection card 401 is provided on the outside of the battery compartment 4 , electrodes 402 are provided on both sides of the inside of the battery compartment 4 , and a plurality of button batteries 403 are provided between the electrodes 402 . The battery rear cover 103 cooperates with the battery compartment 4 .

[0035] A buckle 6 is provided at the front of the pen body shell 101 , a through hole 601 is provided at the center of the buckle 6 , and clamping points 602 are provided on both sides of the buckle 6 . The clamping points 602 cooperate with the probe front cover 102 , and the detection mechanism 2 moves in the through hole 601 .

[0036] It also includes a display screen 7 and a plurality of buttons 8 , and both the display screen 7 and the buttons 8 are electrically connected to the circuit board 3 .

[0037] The portable retractable TDS water quality testing pen of this embodiment is in the shape of a flat pen as a whole, and is composed of a shell mechanism 1, a testing mechanism 2, a circuit board 3, a battery compartment 4, a display screen 7 and a plurality of buttons 8.

[0038] Specifically, the pen body housing 101 in the housing mechanism 1 is injection-molded from chemically resistant ABS. The front clip 6 of the pen body housing 101 engages with the probe front cover 102 via two side snap points 602. A through-hole corresponding to the probe 201 is provided in the center of the probe front cover 102 to facilitate extension and retraction. The rear battery cover 103 also engages with the battery compartment 4 through a snap-fit ​​fit.

[0039] Specifically, the probes 201 in the detection mechanism 2 are two stainless steel probes fixed to an insulating base. The rear end of the base is equipped with a first metal terminal 202 and a circuit board avoidance groove 203. A slider 204 with a semicircular cross-section is injection-molded on the right side of the base. The left side is fixedly connected to a sliding button 501, with the button cap exposing a through-hole 104.

[0040] Specifically, the slide rail 502 in the retractable mechanism is a POM injection-molded part fixed to the inner wall of the pen housing 101. The slide groove 503 is loosely fitted with the slider 204. Limiting bumps are located at each end of the slide groove 503 to prevent the detection mechanism 2 from slipping out. The dust shield 504 is a thick silicone sheet, integrally molded with the slide button 501. As the button moves, it always covers the through-hole 104, achieving a dynamic seal.

[0041] Specifically, the circuit board 3 is a double-sided FR-4 board, with a second metal terminal 301 at the front end that slides and engages with the first metal terminal 202. The board is suspended within the pen housing 101 by four fixing clips 105, leaving a gap between it and the battery compartment 4 to prevent impact from drops.

[0042] Specifically, the battery compartment 4 is ABS injection molded, and nickel-plated stainless steel electrodes 402 are embedded on both sides of the compartment body. The electrode springs are in elastic contact with the button battery 403; the connection card 401 cooperates with the circuit board 3 and is electrically connected to realize power supply.

[0043] Specifically, the display screen 7 is embedded in the plane window of the pen body shell 101 and is electrically connected to the circuit board 3; the two touch buttons 8 are located on the lower side of the display screen, and the key caps are flush with the shell.

[0044] Specifically, the user removes the probe front cover 102 and presses the slide button 501 forward. The probe 201 extends out of the pen housing 101, and the first metal terminal 202 and second metal terminal 301 slide into contact, automatically powering on. The probe 201 is then inserted into the liquid being tested. The MCU samples the liquid, performs temperature compensation, and displays the TDS value in real time. When the test is complete, the button is pulled back, the probe retracts, and the system automatically shuts down. When the battery is low, the button cover 103 is opened to replace the button battery 403.

[0045] Through the above structure, this embodiment achieves probe telescopic protection, quick-release battery, dust and water resistance, and stable electrical connection while maintaining the pen shape and portability, significantly improving the reliability, lifespan, and detection measurement of the portable retractable TDS water quality detection pen.

Claims

1. A portable retractable TDS water quality detection pen, comprising a housing mechanism (1), wherein the housing mechanism (1) comprises a pen body housing (101), a probe front cover (102) and a battery rear cover (103), characterized in that: The pen body shell (101) is provided with a detection mechanism (2), a circuit board (3) and a battery compartment (4); the detection mechanism (2) is provided with a telescopic mechanism, the telescopic mechanism comprising a sliding button (501) and a slide rail (502); the sliding button (501) is fixedly connected to one side of the detection mechanism (2); the other side of the detection mechanism (2) is provided with a slider (204); a slide groove (503) is provided in the middle of the slide rail (502); the slider (204) cooperates with the slide groove (503); and the slide rail (502) is fixedly arranged on the inner wall of the pen body shell (101).

2. The portable retractable TDS water quality detection pen according to claim 1, characterized in that: A through hole (104) is provided on one side of the pen body shell (101), and the sliding button (501) is fixedly connected to the detection mechanism (2) through the through hole (104). A plurality of fixing cards (105) are provided on the inner wall of the pen body shell (101), and the circuit board (3) is fixed inside the pen body shell (101) through the fixing cards (105).

3. The portable retractable TDS water quality detection pen according to claim 2, characterized in that: A dustproof plate (504) is provided between the through hole (104) and the detection mechanism (2); the dustproof plate (504) is fixedly connected to the sliding button (501) and is in close contact with the inner wall of the pen body housing (101).

4. The portable retractable TDS water quality detection pen according to claim 1, characterized in that: The front portion of the detection mechanism (2) is provided with a probe (201), and the rear portion is provided with a first metal terminal (202) and a circuit board avoidance groove (203); the front portion of the circuit board (3) is provided with a second metal terminal (301), and the first metal terminal (202) cooperates with the second metal terminal (301).

5. The portable retractable TDS water quality detection pen according to claim 1, characterized in that: A connection card (401) is provided on the outside of the battery compartment (4), electrodes (402) are provided on both sides of the inside of the battery compartment (4), a plurality of button batteries (403) are provided between the electrodes (402), and the battery rear cover (103) cooperates with the battery compartment (4).

6. The portable retractable TDS water quality detection pen according to claim 1, characterized in that: The front portion of the pen body housing (101) is provided with a buckle (6), a through hole (601) is provided at the center of the buckle (6), and clamping points (602) are provided on both sides of the buckle (6). The clamping points (602) cooperate with the probe front cover (102), and the detection mechanism (2) moves in the through hole (601).

7. The portable retractable TDS water quality detection pen according to claim 1, characterized in that: It also includes a display screen (7) and a plurality of buttons (8), and the display screen (7) and buttons (8) are both electrically connected to the circuit board (3).

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