Magnetic fixing type electric tester

Abstract

The utility model relates to a test pen technical field especially a kind of test pen of magnetism suction fixed, including pen body main part, the pen body main part includes holding part and is located at the detection probe of holding part one end, further include protection fixed component and rotation locking assembly, the protection fixed component coaxial sleeve is located at the outside of detection probe, the protection fixed component includes first sleeve tube, the second sleeve tube of first sleeve tube sliding connection and the third sleeve tube of the rotation connection of second sleeve tube remote from the one end of first sleeve tube, the utility model is temporarily fixed by first magnetic attraction piece when using with outside metal carrier contact, can reduce the risk of falling when pen body main part operation, and no matter when using or idle, protection fixed component can reduce the risk of detection probe exposure, reduce the possibility of contact with other articles, while rotation locking assembly locks the position of third sleeve tube, improve the effect of detection probe protection.

Description

Technical Field

[0001] This utility model relates to the field of test pen technology, and in particular to a test pen that can be magnetically fixed. Background Technology

[0002] A test pen can be used in electrical installation, equipment maintenance, and household circuit repair. The test pen includes a test probe, an insulated handle, and an internal detection circuit. During operation, the operator holds the insulated handle and makes the test probe contact the point to be tested. Through the signal feedback from the internal detection circuit, the power on / off status of the test point is determined, thereby avoiding the risk of electric shock and ensuring the personal safety of maintenance personnel.

[0003] However, most existing voltage testers have exposed metal probes without any shielding or protective components. The probes are constantly exposed to the external environment and are prone to collisions or squeezing with other tools in the tool bag, which may cause scratches or oxidation on the probe tip, posing a safety hazard. Furthermore, in electrical work, working at height and in confined spaces accounts for a very high proportion. Current voltage testers rely solely on hand grip for fixation without any additional auxiliary fixing structure, making them prone to falling due to unstable hand position or limited space, thus affecting the smooth progress of the work.

[0004] Therefore, based on the above situation, it is necessary to design a test pen that can be magnetically fixed to solve the above problems. Utility Model Content

[0005] This invention provides a magnetically fixed test pen to solve the problems in the prior art.

[0006] The technical problem solved by this utility model is achieved by the following technical solution:

[0007] A magnetically fixed test pen includes a pen body, which includes a grip and a detection probe at one end of the grip. It also includes a protective fixing component and a rotation locking component. The protective fixing component is coaxially sleeved around the detection probe. The protective fixing component includes a first outer sleeve, a second outer sleeve slidably connected to the first outer sleeve, and a third outer sleeve rotatably connected to the end of the second outer sleeve away from the first outer sleeve. A spring connects the second outer sleeve and the first outer sleeve. A first magnetic element is connected to the end of the third outer sleeve away from the second outer sleeve. The first magnetic element is used to temporarily fix the pen body to an external metal carrier. The rotation locking component is used to lock the detection probe inside the third outer sleeve.

[0008] Preferably, the rotary locking assembly includes an arc-shaped groove extending circumferentially along the outer housing of the detection probe, a vertical groove connected to one end of the arc-shaped groove, and a locking protrusion on the inner wall of the third outer sleeve. When the locking protrusion slides into the arc-shaped groove, the detection probe is located inside the third outer sleeve and its relative position with the third outer sleeve is locked.

[0009] Preferably, the first outer sleeve includes a threaded tube that is threadedly connected to the outer housing of the detection probe and a guide tube that is rotatably connected to one end of the threaded tube, and the second outer sleeve is slidably connected to the inside of the guide tube.

[0010] Preferably, the second outer tube is provided with a fixing protrusion, and the third outer tube is provided with a fixing groove that matches the fixing protrusion.

[0011] Preferably, the third outer sleeve has a counterweight at one end near the first magnetic element.

[0012] Preferably, the gripping part has a multi-faceted prism structure, and each facet of its outer peripheral wall is provided with a second magnetic attraction element.

[0013] The beneficial effects of this utility model are as follows: by temporarily fixing the pen body to the external metal carrier through the contact of the first magnetic component during use, the risk of the pen body falling during operation can be reduced. Moreover, whether in use or idle, the protective fixing component can reduce the risk of the detection probe being exposed and the possibility of contact with other objects. At the same time, the rotation locking component locks the position of the third outer sleeve, improving the protection effect of the detection probe. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 A three-dimensional structural diagram of the prior art provided for this utility model;

[0016] Figure 2 A three-dimensional structural diagram of the pen body when not in use, provided by this utility model;

[0017] Figure 3 A three-dimensional structural diagram of the pen body in use provided by this utility model;

[0018] Figure 4 A three-dimensional structural diagram of the detection probe provided by this utility model during continuous detection;

[0019] Figure 5 This is a partial cross-sectional structural schematic diagram provided for this utility model;

[0020] Figure 6 A cross-sectional structural diagram of the first outer sleeve and the second outer sleeve provided by this utility model.

[0021] In the diagram, 1. Pen body; 11. Grip; 12. Detection probe; 2. Protective fixing assembly; 21. First outer sleeve; 211. Threaded tube; 212. Guide tube; 22. Second outer sleeve; 23. Third outer sleeve; 3. Spring; 4. First magnetic suction component; 5. Rotary locking assembly; 51. Arc-shaped slot; 52. Vertical slot; 53. Locking protrusion; 6. Fixing protrusion; 7. Fixing slot; 8. Counterweight; 9. Second magnetic suction component. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0023] Reference Figure 1 The diagram shown is a schematic of the prior art structure of this utility model. A magnetically fixed test pen includes a pen body 1, which includes a grip part 11 and a detection probe 12 disposed at one end of the grip part 11. In actual use, a test circuit electrically connected to the detection probe 12 is set inside the grip part 11. This circuit may include a carbon film resistor, a neon tube indicating the indicator, a conductive connector, and a battery. The hand holds the grip part 11, and then the detection probe 12 contacts the point to be tested → forming a "live wire → detection probe 12 → current limiting resistor → neon tube → metal electrode → human body → ground" loop → the current limiting resistor reduces the current to a safe range → the current excites the neon tube to light up, indicating that it is charged. When it contacts the neutral wire, there is no potential difference, no current, and no light, indicating that it is not charged. This is prior art and will not be described in detail here.

[0024] like Figures 2-6As shown, to reduce the exposure of the detection probe 12, a protective fixing component 2 is coaxially sleeved on the outside of the detection probe 12. The protective fixing component 2 includes a first outer sleeve 21, a second outer sleeve 22 slidably connected to the first outer sleeve 21, and a third outer sleeve 23 rotatably connected to the end of the second outer sleeve 22 away from the first outer sleeve 21. A spring 3 is connected between the second outer sleeve 22 and the first outer sleeve 21. When using the pen body 1, the third outer sleeve 23 contacts the electrical measurement position. Then, the grip part 11 is held and pressed towards the detection probe 12. At this time, the third outer sleeve 23 drives the second outer sleeve 22 to compress the spring 3, causing deformation. The detection probe 12 is exposed to detect the point to be detected. After the detection is completed, the detection probe 12 is removed from the pen body. When the detection point is removed, the spring 3 returns to its original deformation, and the detection probe 12 enters the third outer sleeve 23 for protection. To prevent the third outer sleeve 23 from moving freely, a rotating locking component 5 is also provided to lock the detection probe 12 inside the third outer sleeve 23. This component can lock the detection probe 12 when it is not in use, reducing damage to the detection probe 12. At the same time, a first magnetic suction component 4 is connected to the end of the third outer sleeve 23 away from the second outer sleeve 22. The first magnetic suction component 4 can be a strong magnet such as a neodymium iron boron magnet or a ferrite magnet, which can be used to attach the pen body 1 to an external metal carrier such as a power distribution box or a metal conduit to temporarily fix the pen body 1 and reduce the risk of the pen body 1 falling off during use.

[0025] Reference Figure 5 As shown, the rotating locking assembly 5 further includes an arc-shaped groove 51 extending circumferentially along the outer housing of the detection probe 12, a vertical groove 52 connected to one end of the arc-shaped groove 51, and a locking protrusion 53 provided on the inner wall of the third outer sleeve 23. In use, rotating the third outer sleeve 23 causes the locking protrusion 53 to move within and along the arc-shaped groove 51. For example, rotating the third outer sleeve 23 counterclockwise. When the third outer sleeve 23 cannot rotate, the locking protrusion 53 is located at one end of the arc-shaped groove 51. When the detection probe 12 moves from the outer housing of the third outer sleeve 23... When the third outer tube 23 is exposed for testing, the second outer tube 22 slides inside the first outer tube 21, while the locking protrusion 53 slides in the vertical slot 52. After use, the third outer tube 23 is rotated clockwise. When the third outer tube 23 cannot be rotated, the locking protrusion 53 is located at the end of the arc-shaped slot 51 away from the vertical slot 52, which limits the vertical movement of the locking protrusion 53, thereby restricting the sliding of the second outer tube 22 in the first outer tube 21. At this time, the detection probe 12 is located inside the third outer tube 23 and its relative position with the third outer tube 23 is locked.

[0026] The second outer tube 22 is provided with a fixing protrusion 6, and the third outer tube 23 is provided with a fixing groove 7 that matches the fixing protrusion 6. When the third outer tube 23 is rotated, the third outer tube 23 drives the locking protrusion 53 to move to both ends of the arc-shaped groove 51. The fixing protrusion 6 will be engaged in the fixing groove 7, thereby limiting the rotation of the third outer tube 23 and reducing the possibility of the third outer tube 23 rotating arbitrarily. The fixing protrusion 6 can be made of rubber, silicone or other materials.

[0027] Reference Figure 2 , Figure 3 , Figure 4 as well as Figure 6 As shown, the first outer sleeve 21 further includes a threaded tube 211 threadedly connected to the outer housing of the detection probe 12 and a guide tube 212 rotatably connected to one end of the threaded tube 211. The second outer sleeve 22 is slidably connected to the inside of the guide tube 212. Due to the diverse requirements of detection, it may be necessary to continuously detect multiple detection points. At this time, the detection probe 12 needs to be exposed to facilitate continuous detection. The threaded tube 211 can be rotated, and the threaded tube 211 moves towards the gripping part 11, driving the second outer sleeve 22, the third outer sleeve 23, etc. to move. Since the locking protrusion 53 cannot follow the third outer sleeve 23 to rotate 360 ​​degrees around the center of the third outer sleeve 23, when the threaded tube 211 rotates, the threaded tube 211 can rotate relative to the guide tube 212 rotatably connected to it, further improving the flexibility of use.

[0028] Reference Figures 2-5 As shown, further, a counterweight 8 is provided at one end of the third outer sleeve 23 near the first magnetic suction member 4. The counterweight 8 can make the front end of the detection probe 12 heavier. Since the grip part 11 is far away from the first magnetic suction member 4 and the grip part 11 needs to have a certain weight, in order to reduce the center of gravity shift of the pen body 1, the counterweight 8 increases the weight of the front end of the detection probe 12, thereby improving the stability of the pen body 1 temporarily fixed on the external metal part.

[0029] Reference Figures 2-4 As shown, the grip part 11 is a multi-faceted prism structure. When the pen body 1 is placed on a flat surface, it can reduce the rolling and falling of the pen body 1. At the same time, each edge of its outer peripheral wall is provided with a second magnetic attractor 9. The second magnetic attractor 9 can be a strong magnet such as neodymium iron boron magnet or ferrite magnet, just like the first magnetic attractor 4. When working, the pen body 1 needs to be placed in a certain position. The second magnetic attractor 9 cooperates with each edge to reduce the rolling of the pen body 1 and increase the stability of the pen body 1.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A magnetically fixed voltage tester, comprising a pen body (1), wherein the pen body (1) includes a grip (11) and a detection probe (12) disposed at one end of the grip (11), characterized in that, Also includes; A protective fixing component (2) is coaxially sleeved on the outside of the detection probe (12). The protective fixing component (2) includes a first outer sleeve (21), a second outer sleeve (22) slidably connected to the first outer sleeve (21), and a third outer sleeve (23) rotatably connected to the end of the second outer sleeve (22) away from the first outer sleeve (21). A spring (3) is connected between the second outer sleeve (22) and the first outer sleeve (21). A first magnetic suction component (4) is connected to the end of the third outer sleeve (23) away from the second outer sleeve (22). The first magnetic suction component (4) is used to make the pen body (1) adsorb onto the external metal carrier to achieve temporary fixation. Rotary locking assembly (5) is used to lock the detection probe (12) inside the third outer sleeve (23).

2. The magnetically fixed test pen according to claim 1, characterized in that, The rotating locking assembly (5) includes an arc-shaped slot (51) extending circumferentially along the outer shell of the detection probe (12), a vertical slot (52) connected to one end of the arc-shaped slot (51), and a locking protrusion (53) provided on the inner wall of the third outer sleeve (23). When the locking protrusion (53) slides into the arc-shaped slot (51), the detection probe (12) is located inside the third outer sleeve (23) and its relative position with the third outer sleeve (23) is locked.

3. A magnetically fixed test pen according to claim 1, characterized in that, The first outer sleeve (21) includes a threaded tube (211) that is threaded to the outer housing of the detection probe (12) and a guide tube (212) that is rotatably connected to one end of the threaded tube (211). The second outer sleeve (22) is slidably connected to the inside of the guide tube (212).

4. A magnetically fixed test pen according to claim 1, characterized in that, The second outer tube (22) is provided with a fixing protrusion (6), and the third outer tube (23) is provided with a fixing groove (7) that matches the fixing protrusion (6).

5. A magnetically fixed test pen according to claim 1, characterized in that, The third outer sleeve (23) has a counterweight (8) at one end near the first magnetic attractor (4).

6. A magnetically fixed test pen according to claim 1, characterized in that, The gripping part (11) is a multi-faceted prism structure, and each facet of its outer peripheral wall is provided with a second magnetic attractor (9).

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