TDS water quality detection pen

Abstract

The utility model relates to a TDS (Total Dissolved Solids) water quality detection pen which comprises a pen main body, a power supply, a display screen, keys, a circuit board, a metal terminal and a probe, the circuit board is fixed in the main body; the power supply is arranged at the pen tail of the main body and is electrically connected with the circuit board; a display opening is formed in a pen body of the main body; the display screen is electrically connected with the circuit board and is fixed at the display opening; the probe is fixedly arranged at the pen point of the main body, one end of the metal terminal is electrically connected with the circuit board, and the other end is electrically connected with the probe; the pen body of the main body is further provided with a key opening close to the display opening, and the key is electrically connected with the circuit board and fixed at the key opening. The surface of the main body pen body is further provided with a clamping groove comprising a display opening and a key opening, the surface of the main body pen body is further provided with a transparent cover plate which is clamped in the clamping groove, and the cover plate is provided with a through hole for the key to pass through.

Description

Technical Field

[0001] The utility model relates to a TDS water quality detection pen, belonging to the technical field of water quality detection. Background Art

[0002] TDS water quality tester is a simple portable water quality testing tool, which is used to test the TDS value or conductivity of water to determine the degree of water pollution. It also has the function of testing water temperature and ambient temperature. The product can be widely used in water treatment industry, drinking water industry, family, personal home travel, field work, etc. as a water quality inspection and judgment tool. At present, the existing water quality detectors generally do not prevent the reverse installation of the button battery. If the battery is reversely installed and not removed in time, it will short-circuit and burn the device. The metal probe and the circuit board are connected with shrapnel and spring, and the point contact is not reliable, there will be poor contact, the welding operation is cumbersome, and the replacement of the probe when damaged is cumbersome, which greatly affects the production efficiency. Utility Model Content

[0003] In order to solve the above problems existing in the prior art, the utility model provides a TDS water quality detection pen.

[0004] The technical solution of the utility model is as follows:

[0005] A TDS water quality detection pen, comprising a pen body, a power supply, a display screen, a button, a circuit board, a metal terminal and a probe;

[0006] The circuit board is fixed inside the main body, the power supply is arranged at the tail of the main body and is electrically connected to the circuit board; a display opening is provided on the body of the main body, the display screen is electrically connected to the circuit board and is fixed at the display opening; the probe is fixed at the tip of the main body, one end of the metal terminal is electrically connected to the circuit board, and the other end is electrically connected to the probe; a key opening is also provided on the body of the main body close to the display opening, the key is electrically connected to the circuit board and is fixed at the key opening;

[0007] The surface of the main pen body is also provided with a card slot including a display opening and a button opening, and a transparent cover plate is also provided to be fixed at the card slot, and a through hole for passing the button is provided on the cover plate.

[0008] Preferably, two avoidance grooves are provided at the front end of the circuit board, and soldering pads are welded on the circuit board outside the avoidance grooves; the metal terminals are placed in the avoidance grooves and welded on the soldering pads.

[0009] Preferably, the probe includes a metal probe, a limiting surface, a positioning groove and a sealing ring groove, and a sealing ring is installed in the sealing ring groove; an annular sealing ring groove is provided on the circumferential outer wall of the probe body, and a positioning groove is symmetrically provided on the other end of the probe away from the annular sealing ring groove, and a limiting surface is fixedly provided on the circumferential outer wall of the probe, and the limiting surface is located between the annular sealing ring groove and the positioning groove; through holes matching the size of the metal probe are symmetrically provided on the probe body, and the metal probe passes through the through holes on the probe body and is fixed; the metal probe is fixedly connected to the metal terminal, and the positioning groove is connected to the circuit board.

[0010] Preferably, a probe cap is further provided on the outer side of the metal probe, and the probe cap is connected to the main body head.

[0011] Preferably, the main body includes a spring baffle, a positioning oblique wall, a circuit board positioning groove and a main body card slot; the spring baffle is arranged on opposite sides of the tail of the main body; the positioning oblique wall is arranged on the edge of the same side inside the main body; the circuit board positioning groove is arranged on the opposite inner walls inside the main body, and the positions correspond; the main body card slot is arranged on the other two sides of the tail of the main body where the spring baffle is not installed; the circuit board positioning groove is fixedly connected to the circuit board.

[0012] Preferably, battery springs are fixedly connected to both sides of the rear end of the circuit board, and the battery springs are fixedly connected to the spring baffle.

[0013] Preferably, the power source includes a battery cover, a button battery and a battery rack; the battery cover includes a baffle groove, a limiting rib and a battery rib; the baffle groove is symmetrically arranged at the bottom of the inner wall of the battery cover, and its size is adapted to the spring baffle; the limiting rib is arranged at the upper end of the inner wall where the baffle groove is not installed; the battery rib is arc-shaped and installed on the top wall of the battery cover, and its arc size is adapted to the button battery; the battery rack includes a card point, a circuit board card slot, a battery spring avoidance groove and a battery positioning inclined wall; the circuit board card slot is arranged at the bottom of the battery rack, and the battery spring avoidance groove is arranged at the top of the battery The battery rack is provided with a battery spring evasion groove on the outer walls on opposite sides of the battery rack, the card point is arranged on the other two outer walls on the battery rack where the battery spring evasion groove is not installed, the battery positioning oblique wall is installed on the two edges and corners on the same side of the bottom of the battery rack, and the top of the battery rack is provided with a battery placement groove in a specified direction; the button battery is installed in the battery placement groove of the battery rack; the rear end of the circuit board is connected with the circuit board card slot, the spring baffle of the main body passes through the spring evasion groove and is connected with the baffle groove of the battery cover; the battery positioning oblique wall is connected with the positioning oblique wall of the main body; the card point of the battery rack is fixedly connected with the main body card slot of the main body.

[0014] Preferably, the inner wall of the metal terminal is provided with a plurality of concave clamping points.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the utility model, the metal probe is inserted into the metal terminal, and the metal probe and the metal terminal are fixedly connected together through the concave card point; at the same time, when the metal probe is damaged, the entire probe part can be pulled out from the metal terminal and the metal probe can be replaced, so that the contact is firm and the parts can be replaced.

[0017] 2. In the present invention, when the battery is installed in the correct direction, that is, the negative end of the button battery faces the battery spring on one side of the limiting inclined wall, the battery is clamped under the action of the springs on both sides, and the circuit is connected. On the contrary, when the button battery is installed in the wrong direction, that is, the positive end of the battery faces the battery spring on one side of the limiting inclined wall, the positive end is affected by the upper limiting inclined wall of the main body and cannot contact the battery spring on that side, the circuit is not connected, and no current is generated, thereby protecting the detection instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the structural explosion diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the circuit board;

[0020] Figure 3 is a schematic diagram of the structure of the probe;

[0021] Figure 4 The schematic diagram of the structure of the main body;

[0022] Figure 5 It is a structural schematic diagram of a battery rack;

[0023] Figure 6 It is a schematic diagram of the structure of the battery cover;

[0024] Figure 7 It is a top view of the main body without the button battery installed;

[0025] Figure 8 A top view of the main body for correctly installing a button battery;

[0026] Fig. 9 A top view of the main body with the button battery installed incorrectly;

[0027] Fig.10 This is a schematic diagram of the structure after the metal terminal is installed;

[0028] Fig.11 This is a partial enlarged view of the front end of the main body after the circuit board is inserted into the main body;

[0029] Fig.12 It is a structural schematic diagram after the battery rack is installed on the main body;

[0030] Fig.13This is a schematic diagram of the structure after the battery rack is installed on the main body.

[0031] The reference numerals in the figure represent:

[0032] 1. Battery cover; 2. Button battery; 3. Battery holder; 4. Battery spring; 5. Display screen; 6. Key cap; 7. Cover plate; 8. Circuit board; 9. Metal terminal; 10. Probe; 11. Sealing ring; 12. Main body; 13. Probe cover cap; 14. Baffle groove; 15. Limiting rib; 16. Battery rib; 31. Card point; 32. Circuit board card slot; 33. Battery spring avoidance groove; 34. Battery positioning inclined wall; 81. Solder pad; 82. Avoidance groove; 101. Metal probe; 102. Limiting surface; 103. Positioning groove; 104. Sealing ring groove; 121. Battery spring baffle; 122. Positioning inclined wall; 123. Circuit board positioning groove; 124. Main body card slot. DETAILED DESCRIPTION

[0033] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1 As shown, the TDS water quality detection pen of this embodiment includes a pen body 12, a power supply, a display screen 5, a button 6, a circuit board 8, a metal terminal 9 and a probe 10;

[0035] The circuit board 8 is fixed inside the main body 12, and the power supply is arranged at the tail of the main body 12 and is electrically connected to the circuit board 8; a display opening is provided on the body of the main body 12, and the display screen 5 is electrically connected to the circuit board 8 and fixed at the display opening; the probe 10 is fixed at the tip of the main body 12, and one end of the metal terminal 9 is electrically connected to the circuit board 8, and the other end is electrically connected to the probe 10; a key opening is also provided on the body of the main body 12 close to the display opening, and the key 6 is electrically connected to the circuit board 8 and fixed at the key opening;

[0036] The surface of the main body 12 is also provided with a slot including a display opening and a button opening, and a transparent cover plate 7 is also provided to be clamped in the slot, and a through hole is provided on the cover plate 7 to pass the button 6 .

[0037] In this embodiment, the structure explosion diagram of the TDS water quality detection pen is as follows: Figure 1 shown.

[0038] Furthermore, two avoidance grooves 82 are opened at the front end of the circuit board 8 , and soldering pads 81 are welded on the circuit board 8 outside the avoidance grooves 82 ; the metal terminals 9 are placed in the avoidance grooves 82 and welded on the soldering pads 81 .

[0039] In this embodiment, the structure of the circuit board is as follows Figure 2 shown.

[0040] Furthermore, the probe 10 includes a metal probe 101, a limiting surface 102, a positioning groove 103 and a sealing ring groove 104, in which a sealing ring 11 is installed; an annular sealing ring groove 104 is provided on the circumferential outer wall of the probe 10 body, and a positioning groove 103 is symmetrically provided at the other end of the probe 10 away from the annular sealing ring groove 104, and a limiting surface 102 is fixedly provided on the circumferential outer wall of the probe 10, and the limiting surface 102 is located between the annular sealing ring groove 104 and the positioning groove 103; through holes matching the size of the metal probe 101 are symmetrically provided on the probe 10 body, and the metal probe 101 passes through the through holes on the probe 10 body and is fixed; the metal probe 101 is fixedly connected to the metal terminal 9, and the positioning groove 103 is connected to the circuit board 8.

[0041] In this embodiment, the structure of the probe 10 is as follows: Figure 3 shown.

[0042] Furthermore, a probe cap 13 is provided on the outer side of the metal probe 101 , and the probe cap 13 is connected to the head of the main body 12 .

[0043] Furthermore, a sealing ring 11 is installed in the sealing ring groove 104 .

[0044] Furthermore, the main body 12 includes a spring baffle 121, a positioning inclined wall 122, a circuit board positioning groove 123 and a main body card slot 124; the spring baffle 121 is arranged on the opposite sides of the tail of the main body 12; the positioning inclined wall 122 is arranged on the edge of the same side inside the main body 12; the circuit board positioning groove 123 is arranged on the opposite inner wall inside the main body 12, and the positions correspond; the main body card slot 124 is arranged on the other two sides of the tail of the main body 12 where the spring baffle 121 is not installed; the circuit board positioning groove 123 is fixedly connected to the circuit board 8.

[0045] In this embodiment, the structure diagram of the main body 12 is as follows Figure 4 shown.

[0046] Furthermore, battery springs 4 are fixedly connected to both sides of the rear end of the circuit board 8 , and the battery springs 4 are fixedly connected to the spring baffle 121 .

[0047] In this embodiment, the spring, the baffle and the battery are interference-fitted, and the baffle is clamped by the deformation of the spring.

[0048] Furthermore, the power supply includes a battery cover 1, a button battery 2 and a battery rack 3; the battery cover 1 includes a baffle groove 14, a limiting rib 15 and a battery rib 16; the baffle groove 14 is symmetrically arranged at the bottom of the inner wall of the battery cover 1, and its size is adapted to the spring baffle 121; the limiting rib 15 is arranged at the upper end of the inner wall where the baffle groove 14 is not installed; the battery rib 16 is arc-shaped and is installed on the top wall of the battery cover 1, and its arc size is adapted to the button battery 2; the battery rack 3 includes a card point 31, a circuit board card slot 32, a battery spring avoidance groove 33 and a battery positioning inclined wall 34; the circuit board card slot 32 is arranged at the bottom of the battery rack 3, and the battery spring avoidance groove 33 is arranged at the top of the battery rack 3. On the outer walls on the opposite sides of the battery rack 3, the card points 31 are arranged on the other two outer walls of the battery rack 3 where the battery spring avoidance groove 33 is not installed, the battery positioning inclined wall 34 is installed on the two edges on the same side of the bottom of the battery rack 3, and the top of the battery rack is provided with a battery placement groove in a specified direction; the button battery is installed in the battery placement groove of the battery rack 3; the rear end of the circuit board 8 is connected to the circuit board card slot 32, and the spring baffle 121 of the main body 12 passes through the spring avoidance groove 33 and is connected to the baffle groove 14 of the battery cover 1; the battery positioning inclined wall 34 is connected to the positioning inclined wall 122 of the main body; the card point 31 of the battery rack 3 is fixedly connected to the main body card slot 124 of the main body 12.

[0049] In this embodiment, the structural diagrams of the battery rack and the battery cover are as follows: Figure 5 and Figure 6 As shown, the baffle groove 14 and the limiting rib 15 on the battery cover 1 both play a guiding role in the battery cover 1 being covered on the main body 12. The size of the baffle groove 14 is adapted to the size of the spring baffle 121. The limiting rib 15 is installed on the inner wall of the battery cover 1, and is located on the side where the baffle groove 14 is not installed. The length of the limiting rib 15 should be less than the distance from the top of the baffle groove 14 to the top of the battery cover 1. The battery rib 13 is installed on the top wall of the battery cover 1, and its shape corresponds to the button battery 2. It is responsible for pressing the button battery 2 to ensure stable contact.

[0050] The positioning inclined wall 122 not only plays a positioning role when the battery rack 3 is installed, but also plays a limiting role when the button battery 2 is installed in the wrong direction.

[0051] When no batteries are installed, the top view of the battery rack is as follows Figure 7 When the battery is installed in the correct direction, the positive and negative electrodes at both ends of the battery are fully in contact with the battery spring, the circuit is connected, and the top view of the battery rack is as shown in Figure 8 When the battery is inserted in the wrong direction, the upper and lower ends of the positive end of the battery on the right are blocked by the positioning inclined wall 122 of the main body 12, and are separated from the battery spring on the right side without contact, so that no loop is formed, thereby protecting the circuit. The top view of the battery rack is as shown in FIG. Fig. 9 shown.

[0052] Furthermore, the inner wall of the metal terminal 9 is provided with a plurality of concave clamping points.

[0053] In this embodiment, the concave clamping point on the inner wall of the metal terminal 9 is an elastic structure, which can fix the metal probe 101 when it is inserted, and can also be pulled out forcefully when the metal probe 101 needs to be replaced.

[0054] In this embodiment, the specific installation steps are as follows:

[0055] The metal terminal 9 is placed on the avoidance groove 82 of the circuit board 8 and fixed to the pad 81 by soldering.

[0056] The metal probe 101 is fixed on the probe 10 by injection molding or gluing, and the sealing ring 11 is installed in the sealing ring groove 104. Then the entire probe 10 is inserted into the metal terminal 9 with the metal probe 101, and the end of the circuit board 8 is inserted into the positioning groove 103 of the probe 10. Through the clamping point in the metal terminal 9 and the positioning groove 103 on the probe 10, the probe 10 and the circuit board 8 can be tightly assembled together. The effect after installation is as shown in the figure Fig.10 shown.

[0057] The battery springs 4 are fixed to the circuit board 8 by welding or locking, one on each side.

[0058] Then, the circuit board 8 with the probe 10 installed is installed into the main body along the circuit board positioning groove 123 on the main body 12, and the limiting surface 102 on the probe 10 is pressed against the limiting groove of the main body 12, wherein the sealing ring 11 on the probe 10 and the side wall of the main body 12 have an interference fit, which plays a role in waterproofing and positioning. The effect of the installation is as follows: Fig.11 As shown; the effect diagram after the circuit board 8 is installed into the main body 12 is as shown Fig.12 As shown, the battery springs 4 on both sides are connected to the battery spring baffles 121 of the main body 12 .

[0059] Insert the battery holder 3 into the battery spring 4 through the battery spring avoidance groove 33, and install it into the main body 12 with the positioning inclined wall 34 and the positioning inclined wall 122 on the main body 12 as the positioning position. At the same time, let the circuit board 8 extend into the card slot 32 on the battery holder 3, and the card point 31 on the battery holder 3 is buckled into the card slot 124 on the main body 12. The effect of the battery holder 3 after installation is as shown in the figure below. Fig.13 shown.

[0060] The button battery 2 is installed in the battery receiving slot of the battery holder 3 and the battery cover is closed. Finally, the probe cap 6 is installed on the head of the main body 12 to protect the metal probe 101 and the assembly is completed.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A TDS water quality detection pen, characterized in that: It comprises a pen body (12), a power source, a display screen (5), a button (6), a circuit board (8), a metal terminal (9) and a probe (10); The circuit board (8) is fixed inside the main body (12); the power supply is arranged at the tail of the main body (12) and is electrically connected to the circuit board (8); a display opening is provided on the body of the main body (12); the display screen (5) is electrically connected to the circuit board (8) and is fixed to the display opening; the probe (10) is fixedly arranged at the tip of the main body (12); one end of the metal terminal (9) is electrically connected to the circuit board (8) and the other end is electrically connected to the probe (10); a key opening is also provided on the body of the main body (12) close to the display opening; the key (6) is electrically connected to the circuit board (8) and is fixed to the key opening; The surface of the main body (12) is also provided with a slot including a display opening and a button opening, and a transparent cover plate (7) is provided to be locked in the slot, and a through hole is provided on the cover plate (7) to pass through the button (6).

2. A TDS water quality detection pen according to claim 1, characterized in that: The front end of the circuit board (8) is provided with two avoidance grooves (82), and soldering pads (81) are soldered on the circuit board (8) outside the avoidance grooves (82); the metal terminals (9) are placed in the avoidance grooves (82) and soldered on the soldering pads (81).

3. A TDS water quality detection pen according to claim 1, characterized in that: The probe (10) comprises a metal probe (101), a limiting surface (102), a positioning groove (103) and a sealing ring groove (104), wherein a sealing ring (11) is installed in the sealing ring groove (104); an annular sealing ring groove (104) is provided on the circumferential outer wall of the main body of the probe (10); the positioning groove (103) is symmetrically arranged at the other end of the probe (10) away from the annular sealing ring groove (104); and the circumferential outer wall of the probe (10) is fixed with a sealing ring (11). A limit surface (102) is arranged, and the limit surface (102) is located between the annular sealing ring groove (104) and the positioning groove (103); through holes matching the size of the metal probe (101) are symmetrically opened on the probe (10) body, and the metal probe (101) passes through the through hole on the probe (10) body and is fixed; the metal probe (101) is fixedly connected to the metal terminal (9), and the positioning groove (103) is connected to the circuit board (8).

4. A TDS water quality detection pen according to claim 3, characterized in that: A probe cap (13) is also provided on the outer side of the metal probe (101), and the probe cap (13) is connected to the head of the main body (12).

5. A TDS water quality detection pen according to claim 1, characterized in that: The main body (12) comprises a spring baffle (121), a positioning oblique wall (122), a circuit board positioning groove (123) and a main body clamping groove (124); the spring baffle (121) is arranged on two opposite sides of the rear of the main body (12); the positioning oblique wall (122) is arranged on the edge of the same side inside the main body (12); the circuit board positioning groove (123) is arranged on the opposite inner wall inside the main body (12) and the positions thereof correspond; the main body clamping groove (124) is arranged on the other two sides of the rear of the main body (12) where the spring baffle (121) is not installed; and the circuit board positioning groove (123) is fixedly connected to the circuit board (8).

6. A TDS water quality detection pen according to claim 5, characterized in that: Battery springs (4) are also fixedly connected to both sides of the rear end of the circuit board (8), and the battery springs (4) are fixedly connected to the spring baffle (121).

7. A TDS water quality detection pen according to claim 5, characterized in that: The power source comprises a battery cover (1), a button battery (2) and a battery rack (3); the battery cover (1) comprises a baffle groove (14), a limiting rib (15) and a battery rib (16); the baffle groove (14) is symmetrically arranged at the bottom of the inner wall of the battery cover (1), and its size is adapted to the spring baffle (121); the limiting rib (15) is arranged at the upper end of the inner wall where the baffle groove (14) is not installed; the battery rib (16) is arc-shaped and is installed on the top wall of the battery cover (1), and its arc size is adapted to the button battery (2); the battery rack (3) comprises a clamping point (31), a circuit board clamping groove (32), a battery spring avoidance groove (33) and a battery positioning inclined wall (34); the circuit board clamping groove (32) is arranged at the bottom of the battery rack (3), and the battery spring avoidance groove (33) is arranged at the top of the battery rack (3). On the outer walls of the battery rack (3) on opposite sides, the clamping point (31) is arranged on the outer walls of the other two sides of the battery rack (3) where the battery spring avoidance groove (33) is not installed, the battery positioning inclined wall (34) is installed on the two corners on the same side of the bottom of the battery rack (3), and the top of the battery rack is provided with a battery placement groove in a specified direction; the button battery is installed in the battery placement groove of the battery rack (3); the rear end of the circuit board (8) is connected to the circuit board clamping groove (32), the spring baffle (121) of the main body (12) passes through the spring avoidance groove (33) and is connected to the baffle groove (14) of the battery cover (1); the battery positioning inclined wall (34) is connected to the positioning inclined wall (122) of the main body; the clamping point (31) of the battery rack (3) is fixedly connected to the main body clamping groove (124) of the main body (12).

8. A TDS water quality detection pen according to claim 1, characterized in that: The inner wall of the metal terminal (9) is provided with a plurality of concave clamping points.

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