A test pen

Abstract

The utility model relates to a test pen technical field, concretely is a kind of installation test pen, its solution existing test pen to the technical problem of poor screw fixing stability before installation, including handle and cutter bar, the telescopic connecting rod is installed on the handle, the end of the connecting rod is provided with the holding piece, the installation slot is opened in the holding piece, the slot size of the installation slot can be passed through the stud axial of screw, and the nut of screw cannot be passed through, the side portion of the installation slot is provided with the opening for the transverse crossing of screw;When screw is installed in the end of cutter bar, the position of the connecting rod is adjusted by telescopic, make the holding piece and the end of cutter bar cooperate, the nut of screw is clamped, handle is installed with pivot, the connecting rod is rotatably connected with pivot;By rotating the connecting rod, drive the holding piece away from the end of cutter bar, rotatable block is rotatably installed on handle, and the pivot is installed on rotatable block.

Description

Technical Field

[0001] This utility model relates to the field of test pen technology, specifically to a test pen installation method. Background Technology

[0002] In electrical equipment installation and maintenance, workers often need to install screws that are live or potentially live, while simultaneously verifying the conductivity of the screws after installation to ensure that the circuit connection is compliant and free of safety hazards. Currently, most voltage testers in the industry have a screwdriver-like handle. By using the voltage tester to install screws, the liveness of the screw can be detected in real time via the tester's display, eliminating the need for additional tool changes and thus fulfilling both installation and testing requirements.

[0003] However, existing test pens with installation functions have significant shortcomings in practical use: to temporarily fix the screw and the blade, the test pen handle usually relies solely on its own weak magnetism to attract the screw, but this fixing method has extremely poor stability, and the screw is prone to falling off during installation, affecting work efficiency; if the worker holds the screw directly with their hand to avoid it falling off, when the screw or its connected circuit is not de-energized, the direct contact between the hand and the screw will form a conductive path, which can easily cause electric shock accidents and seriously threaten the personal safety of the workers. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an installation test pen that solves the technical problem of poor stability of screw fixing before installation in existing test pens.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a test pen for installation, comprising a handle and a lever, wherein a retractable connecting rod is mounted on the handle, and a retaining member is provided at the end of the connecting rod. The retaining member has an installation groove, the groove being sized to allow the stud of a screw to pass through axially but not the nut of a screw. An opening is provided on the side of the installation groove for the screw to pass through laterally. When a screw is installed at the end of the lever, the position of the connecting rod is adjusted by telescoping, causing the retaining member to engage with the end of the lever, thereby clamping the nut of the screw.

[0006] Furthermore, the connecting rod includes an inner rod and an outer rod, with the inner rod nested inside the outer rod. There is a damping force between the inner rod and the outer rod to constrain the telescopic movement of the inner rod relative to the outer rod, so as to maintain the relative position of the inner rod and the outer rod after telescopic adjustment.

[0007] Furthermore, the outer rod has a through groove of a certain length on its wall, and the inner rod has an outwardly protruding paddle fixedly installed on its wall. The paddle passes through the through groove and can slide along the length of the through groove.

[0008] Furthermore, a pivot is mounted on the handle, and the connecting rod is rotatably connected to the pivot; by rotating the connecting rod, the retaining member is moved away from the end of the tool holder.

[0009] Furthermore, a rotating block is rotatably mounted on the handle, the rotating block being rotatable relative to the handle, and the pivot is mounted on the rotating block.

[0010] Furthermore, the outer wall of the rotating block is provided with anti-slip texture.

[0011] Furthermore, the handle is internally provided with a circuit module, a display component, and a conductive component electrically connected to the circuit module, and the conductive component is connected to the tool holder; the circuit module, the display component, and the conductive component constitute a test circuit.

[0012] Furthermore, the end of the cutter bar has a cutter head, which is configured to be either straight or cross-shaped.

[0013] Furthermore, the outer wall of the inner rod is provided with a scale to indicate the extension length of the inner rod relative to the outer rod, so as to achieve precise adjustment of the extension length of the connecting rod.

[0014] Compared with the prior art, this utility model provides a method for installing a test pen, which has the following advantages:

[0015] This new type of test pen features a retractable connecting rod and a retaining element with a mounting groove on the handle. The mounting groove axially limits the screw stud (allowing only the stud to pass through and blocking the nut). Adjusting the extension and retraction of the connecting rod allows the retaining element and the end of the handle to clamp the screw nut. Compared to the magnetic fixing method relied upon by traditional test pens, this significantly improves the stability of screw fixing before installation and effectively prevents screws from falling off during installation. Furthermore, it eliminates the need for workers to directly handle the screws, completely cutting off the risk of conductive contact between hands and screws. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention, in which the clamping member cooperates with the end of the tool bar to clamp the screw;

[0017] Figure 2 This is a top view of the present invention, showing the end of the retaining member away from the tool holder.

[0018] Figure 3 This is a schematic diagram of the left side of the present invention, in which the end of the retaining member away from the tool bar is in a clamping state on the screw;

[0019] Figure 4This is a schematic diagram of the left-side structure of the present invention, wherein the pivot is mounted on the rotating block;

[0020] Figure 5 This utility model Figure 1 A partially enlarged structural diagram of point A shown in the image;

[0021] Figure 6 This utility model Figure 1 The diagram shows a partially enlarged structural schematic at point B.

[0022] In the diagram: 1. Handle; 2. Tool holder; 3. Connecting rod; 4. Clamping element; 5. Mounting slot; 6. Screw; 7. Pivot; 8. Through slot; 9. Toggle block; 10. Rotating block; 301. Inner rod; 302. Outer rod. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1This utility model discloses a test pen, comprising a handle 1 and a blade 2 fixedly connected to each other. The handle 1 is made of insulating material, which can effectively block current conduction to the worker's hand and reduce the risk of electric shock. The handle 1 integrates a complete set of electrical components required for the test, specifically including a circuit module, a display component, and a conductive component. One end of the conductive component is fixedly connected to the blade 2 and maintains electrical conductivity, while the other end forms a stable electrical connection with the circuit module. A resistor is installed on the conductive component. The circuit module, as the control core of the test function, has built-in voltage divider and rectifier circuit units to process the detection signal. The display component (such as a neon tube or LED light) is electrically connected to the circuit module and serves as a visual indicator of the energized state. If the display component is located inside the handle 1, the handle 1 can also be made of transparent material so that the worker can clearly observe the working status of the display component. The circuit module, display component, and conductive component together constitute a complete test circuit. When rod 2 contacts the circuit to be tested, if the object to be tested is energized, the current will be conducted to the conductive component through rod 2. After being processed by the circuit module, the display component will be triggered to work (such as the neon tube emitting light or the LED light illuminating). The operator can directly judge whether the current detection position is energized by the status of the display component. One end of rod 2 is fixedly connected to handle 1, and the other end extends to the outside and forms a cutting head for fitting screw 6. The cutting head is the direct working end for installing screw 6. Its type configuration is a variety of shapes commonly used in the industry, such as slotted or cross-shaped. This design allows the test pen to be adapted to screws with corresponding slot types. When slotted screw 6 needs to be installed, rod 2 with slotted cutting head is selected. When cross-shaped screw 6 needs to be installed, rod 2 with cross-shaped cutting head is selected.

[0025] like Figure 2-3 As shown, to achieve stable clamping of the screw 6, a telescopic connecting rod 3 is also installed on the handle 1. The end of the connecting rod 3 is provided with a retaining member 4, and the retaining member 4 has a mounting groove 5 for cooperating and fixing the screw 6. The size of the mounting groove 5 is only large enough for the stud portion of the screw 6 to pass through axially, while the nut portion of the screw 6 cannot pass through because its size is larger than the groove opening, thus effectively blocking the nut; at the same time, the side of the mounting groove 5 has an opening, allowing the screw 6 to pass through the opening laterally, which facilitates the lateral installation of the screw 6 in the mounting groove 5 and also facilitates the lateral removal of the screw 6 from the mounting groove 5. When screw 6 needs to be installed, first place screw 6 at the end of the cutter bar 2 so that the cutter head matches the groove of screw 6. Then, by adjusting the position of the telescopic connecting rod 3, the clamping member 4 is brought closer to screw 6, so that the stud of screw 6 passes through the installation groove 5. At this time, the clamping member 4 and the end of the cutter bar 2 cooperate with each other to form a stable clamp on the nut of screw 6, which not only prevents screw 6 from falling off during installation, but also eliminates the need for workers to directly touch screw 6 for installation.

[0026] The connecting rod 3 can be made of insulating material, or the critical parts of the connecting rod 3 that come into contact with the hand and may come into contact with conductive parts can be made of insulating material. This effectively blocks the conductive path formed by current passing through the connecting rod 3, providing reliable insulation protection when the operator drives the connecting rod 3 to perform extension, rotation, or other adjustment movements, and avoiding the risk of current conduction during hand contact with the connecting rod 3.

[0027] like Figure 2 As shown, the connecting rod 3 adopts an inner and outer rod nesting structure to realize the telescopic function. Specifically, it includes an inner rod 301 and an outer rod 302. The inner rod 301 is nested inside the outer rod 302, and a damping force is provided between the inner rod 301 and the outer rod 302. This damping force is used to constrain the telescopic movement of the inner rod 301 relative to the outer rod 302, and maintain the relative position of the inner rod 301 and the outer rod 302 after adjustment. When the clamping member 4 cooperates with the end of the tool bar 2 to clamp the screw 6 nut, the connecting rod 3 can be stably positioned at the required length, avoiding the screw 6 from falling off due to the accidental telescopic movement of the connecting rod 3.

[0028] Regarding the implementation of damping force, several design schemes can be adopted: First, a contraction setting can be made at the port of the outer rod 302, using the port of the outer rod 302 to form a squeezing force on the nested inner rod 301, thereby producing a damping effect; Second, an anti-slip pad can be installed inside the outer rod 302 near the port, using the friction between the anti-slip pad and the outer wall of the inner rod to form a damping constraint; Third, a metal spring or a small ball bearing with a spring can be set inside the inner rod 301. When the inner rod 301 moves to any position inside the outer rod 302, the metal spring will press against the inner wall of the outer rod with its own elasticity, and the small ball bearing will press against the inner wall of the outer rod 302 under the action of the spring. The length positioning of the inner rod 301 and the outer rod 302 is achieved through the friction between the two and the inner wall of the outer rod 302.

[0029] like Figure 1 and Figure 5 As shown, the outer rod 302 has a through groove 8 of a certain length on its wall, while the inner rod 301 has a protruding lever 9 fixedly installed on its wall. The lever 9 extends through the through groove 8 of the outer rod. In use, the operator can directly move the lever 9 by hand, causing it to slide along the length of the through groove 8, thereby driving the inner rod 301 to extend and retract synchronously inside the outer rod 302, thus adjusting the extension and retraction length of the connecting rod 3. At the same time, the through groove 8 can limit the sliding stroke of the lever 9. When the lever 9 slides to both ends of the through groove 8, the inner wall of the through groove 8 will block the lever 9 from moving further, thereby limiting the maximum extension and maximum retraction of the inner rod 301 inside the outer rod 302, effectively preventing the inner rod 301 from detaching from the outer rod 302.

[0030] The inner rod 301 has a scale on its outer wall, which can intuitively indicate the extension or retraction length of the inner rod 301 relative to the outer rod 302. By observing the scale, the staff can accurately adjust the overall extension and retraction length of the connecting rod 3 to meet the precise control requirements of the position of the clamping part 4 under different installation scenarios.

[0031] As shown in Figures 3 and 6, to prevent the retaining member 4 from obstructing operation after the screw 6 is installed, a pivot 7 is installed on the handle 1. In this embodiment, the pivot 7 is directly installed on the handle 1, and the connecting rod 3 is rotatably connected to the pivot 7, allowing it to rotate or flip around the pivot 7. When actually installing the screw 6, after the screw 6 is initially screwed into the corresponding screw hole, the screw 6 and the screw hole have formed a preliminary stable fit. At this time, it is not necessary for the retaining member 4 to continue to cooperate with the tool holder 2 to hold the screw 6. The operator can rotate the connecting rod 3 to move the retaining member 4 away from the end of the tool holder 2 around the pivot 7, so that the retaining member 4 is no longer located in the mating area between the screw 6 and the tool holder 2. Subsequently, the operator can continue to tighten the screw 6 by turning the handle 1 to prevent the retaining part 4 from obstructing the screw 6 during installation. If the retaining part 4 is not turned away, the end face of the nut and the installation position will clamp the retaining part 4 after the nut is fully installed, making it impossible to remove the test pen smoothly from the screw 6. However, by rotating the connecting rod 3 to move the retaining part 4 away, the screw 6 can be tightened properly, ensuring that the test pen can be easily removed later.

[0032] like Figure 4 As shown, based on the above embodiment, in order to prevent the retaining member 4 and the connecting rod 3 from rotating synchronously with the handle 1 when tightening the screw 6, specifically, a rotating block 10 is rotatably installed on the handle 1. The rotating block 10 can rotate freely relative to the handle 1. The aforementioned pivot 7 for connecting the connecting rod 3 is installed on the rotating block 10. At the same time, anti-slip texture is provided on the outer wall of the rotating block 10 to increase the friction when the hand holds it.

[0033] In actual operation scenarios of tightening screw 6, when it is necessary to keep the position of the retaining member 4 and the connecting rod 3 fixed (so as not to interfere with the clamping of screw 6), the operator can hold the handle 1 with one hand and rotate it to drive the tool bar 2 to tighten screw 6; the other hand can hold the rotating block 10 (the anti-slip texture can prevent the hand from slipping) and keep the rotating block 10 from rotating with the handle 1. Since the pivot 7 is connected to the rotating block 10, and the connecting rod 3 is connected to the rotating block 10 through the pivot 7, the fixed state of the rotating block 10 can keep the pivot 7, the connecting rod 3 and the retaining member 4 stationary, preventing them from rotating synchronously with the rotation of the handle 1.

[0034] To further explain, the method of driving the retaining member 4 away from the end of the tool holder 2 does not solely rely on the pivot 7 connection. The connecting rod 3 can also be made of an elastic material, such as plastic, hard rubber, or an internally elastic material with an outer insulating sheet. When it is necessary to disengage the retaining member 4 from the clamping area of ​​the screw 6, the operator can use external force to cause the elastic connecting rod 3 to tilt or deform, thereby driving the retaining member 4 away from the end of the tool holder 2. This method is simple in structure and can still achieve the positional avoidance of the retaining member 4. Furthermore, when no external force is applied, the connecting rod 3 can return to its original position through its own elasticity, so that it can subsequently cooperate with the end of the tool holder 2 to clamp the screw 6 again.

[0035] In summary, the operation steps for installing the test pen when installing screw 6 are as follows: First, place the screw 6 to be installed into the mounting groove 5 of the retainer 4 (or place it directly at the end of the tool bar 2). Adjust the length of the connecting rod 3 by telescopic adjustment to bring the retainer 4 close to the screw 6 until the retainer 4 is engaged at the nut of the screw 6 and the stud of the screw 6 passes through the mounting groove 5. At this time, the retainer 4 cooperates with the end of the tool bar 2 to form a stable clamp on the nut of the screw 6, which can prevent the screw 6 from falling off. Then, the operator holds the handle 1, aligns the screw 6 with the screw hole to be installed, and screws it in, so that the screw 6 is gradually screwed into the screw hole.

[0036] After screw 6 is screwed into the screw hole a certain distance, the screw 6 and the screw hole have formed a relatively stable connection due to the meshing characteristics of the thread, and there is no need for the retainer 4 to continue clamping. At this time, the operator drives the connecting rod 3 (such as rotating around the pivot 7) to move the retainer 4 away from the end of the tool bar 2, so as to avoid the retainer 4 from obstructing subsequent operations. Finally, the operator continues to manually rotate the handle 1 to drive the tool bar 2 to rotate synchronously, thereby driving the screw 6 to continue to be screwed until the screw 6 is fully installed.

[0037] 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 comprising a handle (1) and a blade (2), characterized in that: A telescopic connecting rod (3) is installed on the handle (1). A retaining member (4) is provided at the end of the connecting rod (3). An installation groove (5) is provided on the retaining member (4). The groove opening of the installation groove (5) is large enough for the stud of the screw (6) to pass through axially, but not for the nut of the screw (6) to pass through. An opening is provided on the side of the installation groove (5) for the screw (6) to pass through laterally. When the screw (6) is installed at the end of the tool bar (2), the position of the connecting rod (3) is adjusted by telescopic adjustment so that the retaining member (4) cooperates with the end of the tool bar (2) to clamp the nut of the screw (6).

2. The installation electrical tester according to claim 1, wherein: The connecting rod (3) includes an inner rod (301) and an outer rod (302). The inner rod (301) is nested inside the outer rod (302). There is a damping force between the inner rod (301) and the outer rod (302) to constrain the telescopic movement of the inner rod (301) relative to the outer rod (302) so as to maintain the relative position of the inner rod (301) and the outer rod (302) after telescopic adjustment.

3. The installation electrical tester according to claim 2, wherein: The outer rod (302) has a through groove (8) of a certain length on its rod wall, and the inner rod (301) has a protruding paddle (9) fixedly installed on its rod wall. The paddle (9) passes through the through groove (8) and can slide along the length of the through groove (8).

4. The installation of the electric pen according to claim 1 or 2, characterized in that: A pivot (7) is mounted on the handle (1), and the connecting rod (3) is rotatably connected to the pivot (7); by rotating the connecting rod (3), the clamping member (4) is driven away from the end of the tool bar (2).

5. The installation electrical tester of claim 4, wherein: A rotating block (10) is rotatably mounted on the handle (1), the rotating block (10) is rotatable relative to the handle (1), and the pivot (7) is mounted on the rotating block (10).

6. The installation electrical tester of claim 5, wherein: The outer wall of the rotating block (10) is provided with anti-slip texture.

7. The installation electrical tester of claim 1, wherein: The handle (1) is provided with a circuit module, a display component and a conductive component electrically connected to the circuit module. The conductive component is connected to the knife bar (2). The circuit module, the display component and the conductive component constitute a test circuit.

8. The installation electrical tester of claim 1, wherein: The end of the cutter bar (2) has a cutter head, which is configured as either a straight line or a cross shape.

9. The installation electrical tester of claim 2, wherein: The inner rod (301) has a scale on its outer wall to indicate the extension length of the inner rod (301) relative to the outer rod (302), so as to achieve precise adjustment of the extension length of the connecting rod (3).

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