Detecting electric pen with replaceable parts

Abstract

The utility model discloses a detection electric pen of spare part replaceable, including detection probe, transparent plastic shell no.

Description

Technical Field

[0001] This utility model relates to the field of testing pen technology, and in particular to a testing pen with replaceable parts. Background Technology

[0002] A test pen is a common safety tool for electricians, and it comes in two types: screwdriver-style and inductive. Its core function is to detect whether an object is live. Contact-type test pens require direct contact with the object being tested, and a neon tube illuminates to indicate this. Inductive test pens do not require contact; they trigger an alarm simply by being near a live object. They can distinguish between live and neutral wires and detect circuit continuity. When using them, it is essential to follow guidelines such as "one-handed operation." They are a fundamental tool for troubleshooting electrical circuits in both homes and industrial settings.

[0003] Traditional test pens are mostly one-piece structures, with core components such as the neon tube, current-limiting resistor, and metal probe fixedly connected to the pen body shell. They cannot be disassembled and replaced individually. Once a part fails due to wear, aging, or damage, the entire test pen becomes unusable and can only be discarded. This not only causes unnecessary waste of parts resources but also increases the cost of repeated procurement. Utility Model Content

[0004] This invention provides a test pen with replaceable parts to solve the above-mentioned problems.

[0005] This utility model provides a test pen with replaceable components, including a test probe, a transparent plastic shell movably sleeved on the outer wall of the test probe, a resistor attached to the side of the test probe, a neon tube movably sleeved inside the transparent plastic shell, a spring disposed on the side of the neon tube, and a metal touch block fixedly connected to the side of the spring. Its characteristic is that:

[0006] The locking device, located on the inner walls of transparent plastic shell 1 and transparent plastic shell 2, includes a fixing pin 2 fixedly connected to the inner wall of transparent plastic shell 1, a fixing pin 1 slidably sleeved on the inner wall of fixing pin 2, an arc-shaped locking block 1 fixedly connected to the inner walls of transparent plastic shell 1 and transparent plastic shell 2, an arc-shaped locking block 2 fitted to the inner wall of arc-shaped locking block 1, and a top cover plate fixedly connected to the side of arc-shaped locking block 2.

[0007] In a replacement component testing pen according to an embodiment of the present invention, a limiting ring is fixedly connected to the outer wall of the testing probe, and a fixing ring 1 and a fixing ring 2 are movably sleeved on the outer wall of the limiting ring. The outer side of the fixing ring 2 is open, the outer wall of the fixing ring 1 is fixedly connected to the transparent plastic shell 1, and the outer wall of the fixing ring 2 is fixedly connected to the transparent plastic shell 2.

[0008] In a test pen with replaceable components according to one embodiment of the present invention, the inner wall of the transparent plastic shell is provided with two sets of clamping blocks, and two sets of extension plates are fixedly connected to the outer side of the clamping blocks. One end of the extension plate is fixedly connected to the bottom end of the extension plate, and the other end of the spring is fixedly connected to the inner wall of the transparent plastic shell.

[0009] In a test pen with replaceable components according to one embodiment of the present invention, the outer wall of the first fixing pin is fixedly connected to the second transparent plastic shell, and the positions of the first fixing pin and the second fixing pin are aligned.

[0010] In a test pen with replaceable components according to one embodiment of the present invention, the two sets of clamping blocks are hinged to each other with an extension column, and the bottom end of the extension column is fixedly connected to a transparent plastic shell.

[0011] In a test pen with replaceable components according to one embodiment of the present invention, side baffles are fixedly connected to both ends of the clamping block, and the inner diameter of the side baffles is larger than the diameter of the test probe.

[0012] In a test pen with replaceable components according to one embodiment of the present invention, a set of side baffles are fixedly connected to the outer wall of the side baffles, and a connecting block is movably sleeved on the outer wall of the limiting wedges.

[0013] In a test pen with replaceable components according to one embodiment of the present invention, the side of the spring is fixedly connected to the expansion plate, and the side of the expansion plate is in contact with the side of one of the connecting blocks.

[0014] In a test pen with replaceable components according to one embodiment of the present invention, a guide column is fixedly connected to the side of the metal touch block, and a spring is movably sleeved on the outer wall of the guide column.

[0015] The technical solution provided in this application embodiment can include the following beneficial effects: This application designs a test pen with replaceable parts, which can be fastened by fixing pin one and fixing pin two, so that the shell can be detached and opened. When a part is damaged, it does not need to be discarded as a whole, but only the failed part can be replaced and reused, which greatly reduces resource waste and procurement costs. By regularly replacing vulnerable parts such as probes and neon tubes, the detection accuracy can be maintained for a long time and the overall service life can be extended. No professional tools are required for maintenance, and users can operate it themselves, which lowers the maintenance threshold. For different scenario needs, it can also flexibly replace the adaptable parts, improve the flexibility and economy of use, and take into account environmental protection and practical value.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a test pen with replaceable parts according to an embodiment of this application;

[0019] Figure 2 yes Figure 1 Internal structure diagram;

[0020] Figure 3 yes Figure 1 The internal structure diagram on the other side;

[0021] Figure 4 yes Figure 1 Tail end structure diagram;

[0022] Figure 5 yes Figure 1 A partial split diagram;

[0023] Figure 6 yes Figure 5 Another perspective on the local structure;

[0024] Figure 7 yes Figure 2 and Figure 3 A schematic diagram of the internal fixing pin structure.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Detection probe; 2. Transparent plastic shell one; 3. Connecting block; 4. Transparent plastic shell two; 5. Resistor; 6. Neon tube; 7. Expanding contact plate; 8. Spring one; 9. Guide column; 10. Metal touch block; 11. Limiting ring; 12. Fixing ring one; 13. Fixing pin one; 14. Fixing ring two; 15. Arc-shaped clamping block one; 16. Arc-shaped clamping block two; 17. Top cover plate; 18. Clamping block; 19. Extension plate; 20. Spring two; 21. Limiting wedge block; 22. Extension column; 23. Side baffle; 24. Fixing pin two. Detailed Implementation

[0027] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] 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," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] like Figures 1 to 7 As shown, this application provides a test pen with replaceable components, including: a test probe 1, a transparent plastic shell 2 movably sleeved on the outer wall of the test probe 1, a resistor 5 attached to the side of the test probe 1, a neon tube 6 movably sleeved inside the transparent plastic shell 2, a spring 8 disposed on the side of the neon tube 6, and a metal touch block 10 fixedly connected to the side of the spring 8, characterized in that:

[0031] The locking device, located on the inner walls of the transparent plastic shell 12 and the transparent plastic shell 24, includes a fixing pin 24 fixedly connected to the inner wall of the transparent plastic shell 12, a fixing pin 13 slidably sleeved on the inner wall of the fixing pin 24, an arc-shaped locking block 15 fixedly connected to the inner walls of the transparent plastic shell 12 and the transparent plastic shell 24, an arc-shaped locking block 26 fitting against the inner wall of the arc-shaped locking block 15, and a top cover plate 17 fixedly connected to the side of the arc-shaped locking block 26. The outer wall of the fixing pin 13 is fixedly connected to the transparent plastic shell 24, and the position of the fixing pin 13 is aligned with the position of the fixing pin 24.

[0032] After adopting the above technical solution, when disassembly is required, the tail end of the top cover 17 should be held by hand and pulled out smoothly laterally from the inside of the transparent plastic shell 1 2 and the transparent plastic shell 2 4. At this time, the arc-shaped locking blocks 2 16 on both sides of the top cover will be subjected to the pulling force and will be laterally squeezed by the protruding end of the arc-shaped locking block 1 15 on the inner wall of the transparent plastic shell. Because the arc-shaped locking block 2 has elastic properties, it will shrink and deform inward, thereby releasing the locking engagement with the arc-shaped locking block 1, allowing the top cover to be smoothly removed. Subsequently, pull the transparent plastic shell 2 4 towards the tail end, and the multiple sets of fixing pins 1 13 fixed on its inner wall will gradually disengage from the socket holes of the fixing pins 2 24 on the inner wall of the transparent plastic shell 1 2, so that the two sets of pins are alternately staggered, which not only ensures the stability when fastened, but also facilitates separation. After all the pins are completely released from the socket, the two plastic shells can be easily separated to expose the internal parts for inspection or replacement. After the replacement is completed, first align and fasten the transparent plastic shell 12 and the transparent plastic shell 24, so that the fixing pin 13 and the fixing pin 24 are accurately re-fitted. Then, insert the top cover plate 17 back into the side of the tail end of the two sets of pins along the original direction. Under the action of elastic restoring force, the arc-shaped locking block 26 is re-clamped with the outer wall of the arc-shaped locking block 15, thus completing the overall sealing and fixing.

[0033] The top of the second curved contact block 16 is specially designed with a rounded structure, and its rounded surface can fit tightly with the wavy toothed surface of the first curved contact block 15. The second curved contact block is made of engineering plastic with a certain degree of elasticity. This design not only facilitates deformation adaptation during installation and disassembly, but also allows it to continuously apply pressure to the first curved contact block using its own elastic potential energy, generating strong static friction at the contact surface of the two. This effectively prevents the top cover from loosening due to vibration or collision during the use of the test pen, ensuring structural stability.

[0034] In one optional embodiment, a limiting ring 11 is fixedly connected to the outer wall of the detection probe 1. A fixing ring 12 and a fixing ring 14 are movably sleeved on the outer wall of the limiting ring 11. The outer side of the fixing ring 14 is open. The outer wall of the fixing ring 12 is fixedly connected to the transparent plastic shell 2, and the outer wall of the fixing ring 14 is fixedly connected to the transparent plastic shell 4. By fixing the annular limiting ring 11 near the center of the outer wall of the detection probe 1, when the detection probe is assembled with the transparent plastic shell 2 and the transparent plastic shell 4, the outer wall of the limiting ring will precisely embed between the fixing ring 12 and the fixing ring 14 on the inner wall of the shell, forming an axial limit. This accurately fixes the installation length and extension position of the detection probe, preventing it from sliding back and forth during use. Simultaneously, a notch is intentionally provided on the outer side of the fixing ring 14. This design prevents the fixing ring 14 from obstructing or interfering with the disassembly of the transparent plastic shell 2, ensuring that the shell can be smoothly pulled to the side for separation.

[0035] In one optional embodiment, the inner wall of the transparent plastic shell 2 is provided with two sets of clamping blocks 18, and two sets of extension plates 19 are fixedly connected to the outer side of the clamping blocks 18. One end of the second spring 20 is fixedly connected to the bottom end of the extension plate 19, and the other end of the second spring 20 is fixedly connected to the inner wall of the transparent plastic shell 2. The two sets of symmetrically distributed clamping blocks 18 are used to wrap around and limit the clamping of the resistor 5 or the neon tube 6, so that the component is always kept on the central axis of the test pen, ensuring that it can accurately connect with the conductive end of the detection probe 1, and ensuring the stability of the circuit. The extension plate 19 is fixedly connected to the outer side of the clamping block 18 by screws. The end of the extension plate abuts against one end of the second spring 20, and the other end of the second spring is fixed to the inner wall of the shell. The elastic potential energy of the second spring is transferred to the clamping block through the extension plate, so that the two sets of clamping blocks can apply a continuous and uniform clamping force to the component. At the same time, this elastic connection structure can absorb most of the impact force when the test pen is accidentally dropped or bumped, reducing the damage to the resistor and neon tube caused by severe vibration, and significantly improving the product's service life.

[0036] In an optional embodiment, each of the two sets of clamping blocks 18 is hinged to an extension post 22 at both ends, and the bottom end of the extension post 22 is fixedly connected to the transparent plastic shell 2. By adding an extension post 22 corresponding to the position of the clamping block on the inner wall of the shell, and with the top end of the extension post abutting against the outer edge of the clamping block, the clamping block can be restricted from shifting under force, ensuring that the clamping center of the two sets of clamping blocks remains consistent, avoiding the impact of component offset on the connection stability with the detection probe and the connecting block, and ensuring reliable circuit conduction during detection.

[0037] In an optional embodiment, side baffles 23 are fixedly connected to both ends of the clamping block 18, and the inner diameter of the side baffles 23 is larger than the diameter of the detection probe 1. By adding side baffles 23 to the front and rear ends of the two sets of clamping blocks 18, and vertically connecting the side baffles to the clamping blocks, the resistor 5 or the neon tube 6 can be confined within the receiving space formed by the clamping blocks. This effectively prevents the components from sliding off at both ends during use or transportation of the test pen, further strengthening the fixing effect of the components and avoiding detection failure due to component displacement.

[0038] In one optional embodiment, a set of side baffles 23 are fixedly connected to the outer wall of a limiting wedge block 21, and a connecting block 3 is movably sleeved on the outer wall of the limiting wedge block 21. To solve the problem that the side baffles 23 may obstruct the conductive connection between the resistor 5 and the neon tube 6, a metal connecting block 3 with good conductivity is set between them. The two ends of the connecting block are in contact with the electrodes of the resistor and the neon tube, respectively, forming a conductive bridge to ensure smooth circuit. At the same time, limiting wedge blocks 21 are set on both sides of the connecting block. The wedge blocks are fixed on the inner wall of the outer shell, and their inclined surfaces are tightly fitted with the sides of the connecting block. This not only limits the lateral movement of the connecting block, but also ensures that the connecting block is aligned with the sides of the resistor and the neon tube through the wedge structure, preventing the connecting block from sliding and causing poor contact.

[0039] In one optional embodiment, the side of the spring 8 is fixedly connected to the expansion plate 7, and the side of the expansion plate 7 is in contact with the side of one of the connecting blocks 3. The side of the metal touch block 10 is fixedly connected to the guide column 9, and the outer wall of the guide column 9 is movably sleeved with the spring 8. When performing circuit testing, the metal touch block 10 is pressed into the inside of the transparent plastic shell 2 and the transparent plastic shell 4 with a finger. The metal guide column 9 fixedly connected to the inside of the metal touch block will move down accordingly, first tightly contacting the outer wall of the expansion plate 7. Then, continued pressing will push the expansion plate to move the two sets of connecting blocks 3 towards the resistor 5 and the neon tube 6 respectively, so that the connecting block is in full contact with the electrodes of the two. At the same time, it further pushes the resistor closer to the detection probe 1 until one end of the resistor is in contact with the conductive end of the detection probe. Finally, a complete detection path of "detection probe → resistor → connecting block → neon tube → connecting block → expansion plate → guide column → metal touch block → human body → ground" is formed, completing the circuit live detection.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. 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, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0041] 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.

[0042] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] 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 test pen with replaceable parts, comprising a test probe (1), a transparent plastic shell (2) movably sleeved on the outer wall of the test probe (1), a resistor (5) attached to the side of the test probe (1), a neon tube (6) movably sleeved inside the transparent plastic shell (2), a spring (8) disposed on the side of the neon tube (6), and a metal touch block (10) fixedly connected to the side of the spring (8), characterized in that: The locking device is located on the inner wall of the first transparent plastic shell (2) and the second transparent plastic shell (4), including a second fixed pin (24) fixedly connected to the inner wall of the first transparent plastic shell (2), a first fixed pin (13) slidably sleeved on the inner wall of the second fixed pin (24), a first arc-shaped locking block (15) fixedly connected to the inner wall of the first transparent plastic shell (2) and the second transparent plastic shell (4), a second arc-shaped locking block (16) fitted to the inner wall of the first arc-shaped locking block (15), and a top cover plate (17) fixedly connected to the side of the second arc-shaped locking block (16).

2. The test pen with replaceable parts according to claim 1, characterized in that, The outer wall of the detection probe (1) is fixedly connected to a limiting ring (11). The outer wall of the limiting ring (11) is movably sleeved with a first fixing ring (12) and a second fixing ring (14). The outer side of the second fixing ring (14) is open. The outer wall of the first fixing ring (12) is fixedly connected to a first transparent plastic shell (2), and the outer wall of the second fixing ring (14) is fixedly connected to a second transparent plastic shell (4).

3. A test pen with replaceable parts according to claim 1, characterized in that, The inner wall of the transparent plastic shell 1 (2) is provided with two sets of clamping blocks (18). Two sets of extension plates (19) are fixedly connected to the outer side of the clamping blocks (18). One end of the spring 2 (20) is fixedly connected to the bottom end of the extension plate (19). The other end of the spring 2 (20) is fixedly connected to the inner wall of the transparent plastic shell 1 (2).

4. A test pen with replaceable components according to claim 1, characterized in that, The outer wall of the first fixing pin (13) is fixedly connected to the second transparent plastic shell (4), and the position of the first fixing pin (13) is aligned with the position of the second fixing pin (24).

5. A test pen with replaceable parts according to claim 3, characterized in that, The two sets of clamping blocks (18) are hinged at both ends with extension columns (22), and the bottom end of the extension columns (22) is fixedly connected to the transparent plastic shell (2).

6. A test pen with replaceable components according to claim 3, characterized in that, Both ends of the clamping block (18) are fixedly connected to side baffles (23), and the inner diameter of the side baffles (23) is larger than the diameter of the detection probe (1).

7. A test pen with replaceable parts according to claim 6, characterized in that, One of the side baffles (23) has a limiting wedge block (21) fixedly connected to its outer wall, and a connecting block (3) is movably sleeved on the outer wall of the limiting wedge block (21).

8. A test pen with replaceable parts according to claim 1, characterized in that, The side of the spring (8) is fixedly connected to the expansion plate (7), and the side of the expansion plate (7) is in contact with the side of one of the connecting blocks (3).

9. A test pen with replaceable parts according to claim 1, characterized in that, A guide column (9) is fixedly connected to the side of the metal touch block (10), and a spring (8) is movably sleeved on the outer wall of the guide column (9).

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