A test pen with a display screen

Abstract

This utility model discloses a test pen with a display screen, including a shell, a display screen mounted on the shell, a button on the side of the shell, a circuit board installed inside the shell, and a battery installed inside the shell. A pen tip is detachably mounted on one end of the shell, and a slot is provided on the outer side of the pen tip. A base is provided inside the shell, and a retaining spring for fixing the pen tip is installed on one side of the base. An unlocking sleeve is slidably mounted on one end of the shell and is slidably installed inside the unlocking sleeve. A conductive component is fixedly connected inside the shell, and a connecting hole is provided through the center of the conductive component. This utility model, through the design of the retaining spring, unlocking sleeve, and slot, makes it easy to install the pen tip by simply inserting it into the unlocking sleeve, and to remove it by simply pressing the unlocking sleeve inward. This makes the pen tip installation and removal steps very simple and greatly improves the efficiency of pen tip installation and removal.

Description

Technical Field

[0001] This utility model relates to the field of voltage testing pen technology, specifically a voltage testing pen with a display screen. Background Technology

[0002] A voltage tester is a portable electrical tool used to detect whether an object is electrified. It is widely used in electrical safety testing, circuit fault diagnosis, and other scenarios. Based on different structures and functions, voltage testers are mainly divided into the following categories: neon tube voltage testers, inductive voltage testers, and digital voltage testers. Digital voltage testers have a display screen that can display information such as voltage values.

[0003] To allow for replacement after damage, the tips of existing test pens are designed to be detachable. Most test pens are fixed with threaded connections. However, the small size of the test pens often causes slippage when rotating, making disassembly and assembly inconvenient and inefficient. Utility Model Content

[0004] The purpose of this invention is to provide a test pen with a display screen to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a test pen with a display screen, comprising a shell, a display screen mounted on the shell, a button disposed on the side of the shell, a circuit board disposed inside the shell, and a battery disposed inside the shell. A pen tip is detachably mounted on one end of the shell, and a slot is provided on the outer side of the pen tip. A base is provided inside the shell, and a retaining spring for fixing the pen tip is mounted on one side of the base. An unlocking sleeve is slidably mounted on one end of the shell, and the unlocking sleeve is slidably mounted inside the unlocking sleeve. A conductive component is fixedly connected inside the shell, and a docking hole is provided through the center of the conductive component. A docking post is provided at one end of the pen tip to be inserted into the docking hole.

[0006] As a preferred embodiment of this utility model, the inner wall of the docking hole is provided with a plurality of protrusions distributed in an annular pattern at equal intervals, and the outer side of the docking post is provided with a groove corresponding to the protrusions.

[0007] As a preferred embodiment of this utility model, the inner wall of the outer shell is provided with a limiting part, the end of the unlocking sleeve near the retaining spring is provided with an inclined surface, and the other end of the unlocking sleeve is provided with a protruding ring.

[0008] In a preferred embodiment of this utility model, a connector is installed at the end of the conductive component away from the pen tip. The connector is connected to the circuit board. A screw is threaded to one end of the conductive component, and the screw passes through the connector and connects to the conductive component.

[0009] Compared with the prior art, the beneficial effects of this utility model are: the utility model, through the setting of the snap ring, unlocking sleeve and slot, makes it possible to simply insert the pen tip into the unlocking sleeve when installing the pen tip, and to simply press the unlocking sleeve inward to remove the pen tip when disassembling, making the pen tip disassembly and assembly steps very simple and greatly improving the efficiency of pen tip disassembly and assembly. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0011] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0012] Figure 3 This is a cross-sectional view of the present invention;

[0013] Figure 4 This utility model Figure 3 Enlarged view of point B in the middle;

[0014] Figure 5 This is a schematic diagram of the structure of the connector, conductive component, snap ring, unlocking sleeve, and pen tip of this utility model.

[0015] Figure 6 This utility model Figure 5 Exploded view.

[0016] In the diagram: 1. Outer shell; 2. Display screen; 3. Button; 4. Pen tip; 5. Unlock sleeve; 6. Raised ring; 7. Circuit board; 8. Battery; 9. Screw; 10. Connector; 11. Conductive component; 12. Base; 13. Snap ring; 14. Bevel; 15. Limiting part; 16. Connecting post; 17. Connecting hole; 18. Protrusion; 19. Groove; 20. Slot. Detailed Implementation

[0017] 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.

[0018] Please see Figures 1 to 6This utility model provides a technical solution: a test pen with a display screen, including a shell 1, a display screen 2 mounted on the shell 1 for displaying the test results, a button 3 on the side of the shell 1, a circuit board 7 installed inside the shell 1, and components such as a detection module and a control module mounted on the circuit board 7 for detecting current. The detection module and control module are existing technologies and will not be described in detail. A battery 8 is installed inside the shell 1 for power supply. A pen tip 4 is detachably mounted on one end of the shell 1. To install the pen tip 4, simply insert the pen tip 4 into the unlocking sleeve 5. One end of the unlocking sleeve 5 will compress the retaining spring 13, causing it to expand outwards and deform. When one end of the pen tip 4 is pressed against the conductive component 11 and cannot move, the retaining groove 20 aligns with the retaining spring 13, and the retaining spring 13 resets and locks into the retaining groove 20, clamping the pen tip 4, thus completing the installation of the pen tip 4. To remove the pen tip 4, simply push the unlocking sleeve 5 inwards to release the retaining spring 13. The pen tip 4 can then be disassembled, making the disassembly and assembly of the pen tip 4 very simple and greatly improving the efficiency of disassembly and assembly. The outer side of the pen tip 4 has a slot 20, and the inside of the outer shell 1 has a base 12. The base 12 is used to limit the snap ring 13 and prevent the snap ring 13 from shifting. A snap ring 13 for fixing the pen tip 4 is installed on one side of the base 12. An unlocking sleeve 5 is slidably installed on one end of the outer shell 1. The unlocking sleeve 5 is used to squeeze the snap ring 13 to deform the snap ring 13, so that the snap ring 13 no longer clamps the pen tip 4, thereby releasing the fixing effect on the pen tip 4, and the pen tip 4 can be disassembled. The unlocking sleeve 5 is slidably installed inside the unlocking sleeve 5. A conductive component 11 is fixedly connected inside the outer shell 1. A docking hole 17 is provided through the center of the conductive component 11. One end of the pen tip 4 has a docking post 16 that is inserted into the docking hole 17. The docking post 16 can be inserted into the docking hole 17, thereby directly conducting electricity between the conductive component 11 and the pen tip 4, and also ensuring that the pen tip 4 is installed firmly.

[0019] The inner wall of the docking hole 17 is provided with a plurality of annularly distributed protrusions 18, and the outer side of the docking post 16 is provided with a groove 19 corresponding to the protrusions 18. The protrusions 18 and the grooves 19 can increase the contact area between the pen tip 4 and the conductive component 11, ensuring good conductivity, and can also prevent the pen tip 4 from rotating, making the pen tip 4 more securely installed.

[0020] The inner wall of the outer shell 1 is provided with a limiting part 15, which is used to limit the unlocking sleeve 5 and prevent the unlocking sleeve 5 from completely separating from the outer shell 1. The end of the unlocking sleeve 5 near the retaining spring 13 is provided with a bevel 14, which allows the unlocking sleeve 5 to squeeze the retaining spring 13 and deform it. The other end of the unlocking sleeve 5 is provided with a protruding ring 6, which allows the user to push the unlocking sleeve 5.

[0021] The conductive component 11 is connected to a connector 10 at the end away from the pen tip 4. The connector 10 is connected to the circuit board 7. The pen tip 4 is electrically connected to the circuit board 7 through the mating post 16, the conductive component 11 and the connector 10. One end of the conductive component 11 is threaded with a screw 9. The screw 9 is used to fix the connector 10 and the conductive component 11. The screw 9 passes through the connector 10 and connects to the conductive component 11.

[0022] Specifically, when the pen tip 4 is damaged and needs to be disassembled, push the protruding ring 6 inward. The inclined surface 14 on the protruding ring 6 will compress the retaining spring 13, causing the retaining spring 13 to deform outward. The retaining spring 13 will no longer clamp the pen tip 4 and will separate from the retaining groove 20. Then, the pen tip 4 can be directly pulled out for disassembly. When installing the pen tip 4, align the groove 19 with the protrusion 18 and insert the pen tip 4 into the unlocking sleeve 5. The pen tip 4 moves along the unlocking sleeve 5, and the docking post 16 is inserted into the docking hole 17. As the unlocking sleeve 5 moves, it will contact and compress the retaining spring 13. When the retaining spring 13 deforms outward, and one end of the pen tip 4 is pressed against the conductive component 11 and cannot move, the retaining groove 20 aligns with the retaining spring 13. The retaining spring 13 resets and snaps into the retaining groove 20, clamping the pen tip 4. If the pen tip 4 tends to move outward at this time, the pen tip 4 will drive the retaining spring 13 to deform inward, making the retaining spring 13 clamp the pen tip 4 even tighter, so that the pen tip 4 cannot move. Furthermore, the inner side of the retaining spring 13 is stuck in the retaining groove 20, which can also prevent the pen tip 4 from detaching from the outer shell 1, thus fixing the pen tip 4 and completing the installation of the pen tip 4.

[0023] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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 utility model.

[0024] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to 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.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test pen with a display screen, comprising a housing (1), a display screen (2) mounted on the housing (1), a button (3) disposed on the side of the housing (1), a circuit board (7) mounted inside the housing (1), and a battery (8) disposed inside the housing (1), characterized in that: A pen tip (4) is detachably mounted on one end of the outer shell (1). A slot (20) is provided on the outer side of the pen tip (4). A base (12) is provided inside the outer shell (1). A retaining spring (13) for fixing the pen tip (4) is installed on one side of the base (12). An unlocking sleeve (5) is slidably mounted on one end of the outer shell (1). The unlocking sleeve (5) is slidably mounted inside the unlocking sleeve (5). A conductive component (11) is fixedly connected inside the outer shell (1). A docking hole (17) is provided through the center of the conductive component (11). A docking post (16) is provided at one end of the pen tip (4) to be inserted into the docking hole (17).

2. A test pen with a display screen according to claim 1, characterized in that: The inner wall of the docking hole (17) is provided with a plurality of protrusions (18) distributed in an annular pattern at equal intervals, and the outer side of the docking post (16) is provided with a groove (19) corresponding to the protrusions (18).

3. A test pen with a display screen according to claim 1, characterized in that: The inner wall of the outer shell (1) is provided with a limiting part (15), the end of the unlocking sleeve (5) near the snap ring (13) is provided with a bevel (14), and the other end of the unlocking sleeve (5) is provided with a protruding ring (6).

4. A test pen with a display screen according to claim 1, characterized in that: A connector (10) is installed at the end of the conductive element (11) away from the pen tip (4). The connector (10) is connected to the circuit board (7). A screw (9) is threaded onto one end of the conductive element (11). The screw (9) passes through the connector (10) and connects to the conductive element (11).

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