Electric power testing device

Abstract

The invention discloses an electric power testing device, which relates to the technical field of electroprobes and comprises an electroprobe shell and a screw cap screwed on the electroprobe shell, a movable metal contact cover is movably arranged in the screw cap, a lower sealing part is screwed at the lower end of the electroprobe shell, and a metal rod is screwed at the lower end of the lower sealing part. The two limiting rings are installed in the electroprobe shell, a conversion type testing part is arranged between the two limiting rings, the conductive spring is installed in the electroprobe shell and located at the upper end of the conversion type testing part, and the upper end of the conductive spring is connected with a conductive disc. The resistor is installed in the electroprobe shell and located at the bottom end of the limiting ring on the lowermost side, the resistor is in circuit communication with the metal rod through the U-shaped supporting metal sheet, the multifunctional screwdriver bit is movably inserted into the lower end of the metal rod, and the multifunctional screwdriver bit can achieve free conversion between a straight screwdriver and a cross screwdriver. And the angle can be freely adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of electric pens, and particularly to an electric power testing device. Background Art

[0002] In the fields of electric power detection and electrical maintenance, practitioners often face various complex and challenging scenarios in their daily work, which pose extremely high requirements for the electric power testing devices used.

[0003] Traditional electric pens have relatively single functions and can only simply determine whether a component is energized. In actual work, in addition to voltage testing, operations such as screwing and tightening the screws on components are frequently required. However, in many narrow spaces, ordinary electric pens are difficult to reach, resulting in the inability to smoothly carry out the screw screwing work, greatly affecting work efficiency and convenience.

[0004] The testing functions of existing electric pens have limitations. For example, if the neon tube used for indication inside is damaged, the entire electric pen cannot work properly, and there is a lack of effective backup or conversion mechanisms, which may delay the detection work in case of emergency and bring inconvenience to electric power maintenance.

[0005] In a working environment with poor lighting, traditional electric pens do not have a lighting function. Maintenance personnel often need to carry additional lighting equipment, increasing the work burden and operation complexity. At the same time, the electric pen itself lacks a self-check function and is difficult to detect potential damage to key components such as neon tubes in advance, easily resulting in inaccurate detection results due to device failures, and thus may lead to potential safety hazards or incorrect judgments.

[0006] To solve the above-mentioned problems, this patent proposes an innovative electric power testing device, aiming to significantly improve the efficiency, accuracy, and safety of electric power testing, and provide a more reliable, convenient, and multifunctional tool for electric power detection and maintenance work. Summary of the Invention

[0007] The main objective of the present invention is to propose an electric power testing device, aiming to solve the technical problem that traditional electric pens have relatively single functions and cannot be adjusted according to actual application requirements.

[0008] To solve the above problems, the present invention proposes an electric power testing device, comprising

[0009] an electric pen housing and a rotating cap screwed onto the electric pen housing, with a through hole opened at the upper end of the rotating cap;

[0010] a movable metal contact cover, which is movably arranged inside the rotating cap and blocks the through hole on the rotating cap;

[0011] a lower sealing part, which is screwed onto the lower end position of the electric pen housing;

[0012] A metal rod is screwed and installed at the lower end position of the lower sealing part;

[0013] A limit ring, two limit rings are installed at the internal position of the electric pen housing, and a conversion type test part is arranged between the two limit rings;

[0014] A conductive spring is installed inside the electric pen housing and is located at the upper end position of the conversion type test part, and the upper end of the conductive spring is connected with a conductive disc;

[0015] A resistor is installed inside the electric pen housing and is located at the bottom end position of the lowermost limit ring. The resistor is electrically connected to the metal rod through a U-shaped support metal sheet;

[0016] A multi-functional screwdriver bit is movably inserted at the lower end position of the metal rod; wherein, the multi-functional screwdriver bit can freely convert between a flat head and a Phillips head, and can freely adjust the angle.

[0017] In one embodiment, the multi-functional screwdriver bit includes a metal disc;

[0018] A cylindrical plug connector, the cylindrical plug connector is fixedly installed at the upper end position of the metal disc, and inverted triangular blocks are movably inserted on both sides of the cylindrical plug connector. Shrinkage grooves are provided corresponding to the inverted triangular blocks on the left and right sides of the cylindrical plug connector;

[0019] A spring receiving groove is formed inside the inverted triangular block, and the spring receiving groove and the shrinkage groove together form a cavity for accommodating a clamping spring. Both ends of the clamping spring are fixedly connected to the inner walls of the spring receiving groove and the shrinkage groove respectively;

[0020] Limit protrusions are fixedly installed at the front and rear end positions of the metal disc, and a plurality of conical slots are formed around the limit protrusions;

[0021] A rotating shaft, a shaft hole is formed at the central position of the metal disc, and the rotating shaft is rotatably inserted into the shaft hole of the metal disc;

[0022] A rotating connection frame is fixedly installed at the front and rear end positions on the lower side of the rotating shaft, and a fixed flat head is fixedly connected to the lower end of the rotating connection frame;

[0023] A plurality of jacks are formed at the lower end position of the metal disc around its circumference;

[0024] Sliding grooves are respectively formed on the front and rear sides of the fixed flat head;

[0025] A movable flat head is inserted into the sliding groove of the fixed flat head and can slide upward under the action of an upward extrusion force.

[0026] In one embodiment, a cross-shaped plug-in hole is provided at the bottom of the metal rod. The plug-in hole has square holes above and below, and the lower end is open. There are cylindrical through holes on both sides of the plug-in hole. The cylindrical plug-in connector can be plugged into the upper and lower square holes of the plug-in hole, and the inverted triangle block can be snapped into the cylindrical through holes on both sides of the plug-in hole.

[0027] In one embodiment, the movable straight-line lift includes a limit support plate;

[0028] A conical plug-in portion, which is fixedly mounted at the upper end of the limit support plate, and a pull rod is fixedly connected to the outer side of the conical plug-in portion;

[0029] A fixed plug-in column, which is fixedly installed at the center position of the upper end of the limiting support plate, and the fixed plug-in column can be correspondingly plugged into the inside of the plug hole;

[0030] A conversion spring is fixedly mounted at the lower end of the limit support plate, and a connecting column is connected to the lower end of the conversion spring;

[0031] A straight-line main body, which is fixedly mounted at the lower end of the connecting column, and a downwardly opening docking groove is provided inside the straight-line main body;

[0032] The movable adjustment part of the straight-line lift is movably installed at both sides of the lower end of the straight-line lift main body, and the upper end of the movable adjustment part of the straight-line lift is connected with a movable plug-in board;

[0033] The lower end of the main body of the straight-line screwdriver is provided with a movable plug-in slot corresponding to the movable plug-in plate, and an adjusting spring is arranged inside the movable plug-in slot;

[0034] The upper and lower ends of the adjusting spring are respectively fixedly connected to the bottom wall of the movable plug slot and the top wall of the movable plug plate, so that the movable adjusting part of the straight-acting screwdriver can be elastically moved up and down through the adjusting spring, thereby changing the bottom end size of the straight-acting screwdriver main body.

[0035] In one embodiment, the movable straight-line lift further comprises a column rod that slides up and down;

[0036] The up and down sliding column rod is fixedly installed at the inner side of the movable adjustment part of the straight-beam lift;

[0037] An upper and lower sliding column groove is provided on the outer side of the main body of the straight-line screwdriver corresponding to the upper and lower sliding column rod, wherein the movable adjusting part of the straight-line screwdriver can slide up and down in the upper and lower sliding column groove of the main body of the straight-line screwdriver through the upper and lower sliding column rod.

[0038] In one embodiment, the conversion test section includes an upper conductive disk;

[0039] Neon tubes, multiple neon tubes are installed at the lower end of the upper conductive disk, and the top ends of the neon tubes are electrically connected to the upper conductive disk;

[0040] A lower insulating disc, which is installed at the lower end position of the neon tube, and an insulating gear is provided at the lower end of the lower insulating disc;

[0041] A cable through hole is provided at the centers of the upper conductive disc, the lower insulating disc and the insulating gear;

[0042] Metal blocks, a plurality of metal blocks are installed at the bottom end position of the insulating gear, and the plurality of metal blocks pass through the insulating gear and the lower insulating disc and are electrically connected to the corresponding neon tubes;

[0043] Wherein, a hemispherical groove is provided at the bottom of the metal block, and the periphery of the metal block is provided with a slope shape.

[0044] In one embodiment, a support frame is fixedly provided inside the lowermost limiting ring, a support spring is provided at one side position of the upper end of the support frame, and a conductive ball head is connected to the upper end position of the support spring. The conductive ball head can be elastically clamped inside the hemispherical groove provided at the lower side of the metal block.

[0045] In one embodiment, a cylindrical groove is provided on the side of the electric pen housing. An adjusting gear is rotatably provided inside the cylindrical groove. The adjusting gear freely rotates inside the cylindrical groove provided in the electric pen housing through a rotating shaft. The inner side of the adjusting gear meshes with the insulating gear on the conversion type testing part, and the outer side of the adjusting gear protrudes to the outside of the electric pen housing.

[0046] In one embodiment, a battery compartment is provided inside the electric pen housing and on the inner side of the U-shaped support metal sheet. A plurality of lighting parts are provided at the bottom end of the lower sealing part on the lower side of the electric pen housing. The plurality of lighting parts are electrically connected to the battery compartment through a power cord. A switch groove is provided on the other side of the electric pen housing. A switch pressing plate is provided inside the switch groove. The switch pressing plate is rotatably connected to the front and rear walls of the switch groove through a rotating shaft. A convex pressing part is provided at the upper end position on the outer side of the switch pressing plate. A lighting contact switch is provided at the upper end position on the inner side of the switch pressing plate. A self-test contact switch is provided at the lower end position on the inner side of the switch pressing plate;

[0047] The lighting contact switch and the self-test contact switch include a conductive metal sheet, and the conductive metal sheet is fixed on the inner wall of the electric pen housing;

[0048] A conductive metal column, which is fixed inside the groove provided on the inner side of the switch pressing plate and passes through the other end of the electric pen housing and is inserted inside the electric pen housing;

[0049] A return spring is sleeved on the conductive metal column, and both ends are respectively fixed to the outer wall of the electric pen housing and the inner wall of the switch pressing plate.

[0050] In one embodiment, a plurality of pressing springs are connected inside the rotary cap and around the bottom end of the movable metal contact cap. The bottom of the pressing spring is connected to a support ring. When the rotary cap is screwed to the upper end of the electric pen housing, the support ring will be in supporting contact with the top end of the electric pen housing, and at this time, the movable metal contact cap and the conductive disc at the upper end of the conductive spring are in a separated state;

[0051] A pen hook socket frame is sleeved at a position slightly above the outer side of the electric pen housing. The pen hook socket frame can slide on the electric pen housing under the action of an external force. When the pen hook socket frame slides to the position of the convex extrusion part, it will continuously squeeze the convex extrusion part inward.

[0052] Beneficial effects:

[0053] 1. Through structures such as a pulling rod, a conversion spring, a conical insertion part, and a limit projection, the technical solution of the present invention can change the inclination angles of the fixed flat screwdriver bit and the movable flat screwdriver bit, enabling the multi-functional screwdriver bit to be inserted into a narrow space for easy screwing of screws. And double-angle locking is achieved through the fixed insertion column and the insertion hole, which is stable and reliable.

[0054] When encountering a cross-shaped screw, the fixed flat screwdriver bit and the movable flat screwdriver bit can form a cross-shaped screwdriver bit; when encountering a flat screw, the movable flat screwdriver bit will shrink upward under extrusion, allowing the fixed flat screwdriver bit to be inserted, and it can adapt to different screw models.

[0055] 2. Through the cooperation of the inverted triangular blocks on both sides of the columnar plug joint, the clamping spring and the insertion hole at the bottom of the metal rod, when the multi-functional screwdriver bit is worn or damaged, it can be pulled out and replaced by squeezing the inverted triangular blocks with a tool.

[0056] 3. The main body part and the movable adjustment part of the flat screwdriver bit of the technical solution of the present invention are connected by an adjustment spring and can move up and down elastically. It can be automatically adjusted according to the size of the screw. When screwing a larger screw, the movable adjustment part is flush with the bottom of the main body part. When screwing a smaller screw, the movable adjustment part is squeezed and shrinks upward, and the upper and lower sliding column rods and the column grooves make the two form a unified plane, and the force-bearing effect is good.

[0057] 4. By setting a plurality of neon tubes, when a certain neon tube is damaged, rotating the adjustment gear drives the insulating gear to rotate, so that the conductive ball head contacts the metal block at the bottom of different neon tubes, realizing the conversion of neon tubes and avoiding the inability to use the electric pen due to the damage of a single neon tube.

[0058] 5. By arranging a battery compartment inside the electric pen housing and having a lighting part at the lower side, controlling the lighting contact switch through a switch pressing plate, pressing the upper end can turn on the lighting, and when the pen hook socket frame slides to the position of the convex extrusion part, the lighting contact switch can be kept on, which is convenient for detecting the circuit in poor light conditions

[0059] Press the lower end of the pressing switch, and the battery compartment supplies power to the neon tube of the conversion type test unit to realize the self-check of the neon tube, avoiding incorrect tests caused by the damage of the neon tube.

[0060] 6. In the technical solution of the present invention, the movable metal contact cover in the screw cap is connected to the support ring through a pressing spring. In the normal state, it is separated from the conductive disc at the upper end of the conductive spring. When in use, it is necessary to press it with a finger to make it contact to realize the circuit connection. If an electric shock occurs and the finger loses the pressing force, the movable metal contact cover is separated from the conductive disc under the action of the pressing spring, realizing the circuit disconnection and playing a protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0062] Figure 1 is a three-dimensional structural schematic diagram of the power test device of the present invention;

[0063] Figure 2 is a sectional structural schematic diagram of the power test device of the present invention;

[0064] Figure 3 is a partially enlarged structural schematic diagram of the conversion and adjustment of the conversion type test unit of the present invention;

[0065] Figure 4 is a partially enlarged structural schematic diagram of the movable metal contact cover of the present invention;

[0066] Figure 5 is a three-dimensional structural schematic diagram of the multi-functional screwdriver bit of the present invention;

[0067] Figure 6 is a front sectional structural schematic diagram of the multi-functional screwdriver bit of the present invention;

[0068] Figure 7 is a three-dimensional structural schematic diagram of the movable flat head screwdriver of the present invention;

[0069] Figure 8 is a sectional structural schematic diagram of the movable flat head screwdriver of the present invention;

[0070] Figure 9 is a partially enlarged structural schematic diagram of the movable flat head screwdriver of the present invention;

[0071] Figure 10 is a partially enlarged structural schematic diagram of the connection between the multi-functional screwdriver bit and the metal rod of the present invention.

[0072] Figure 11 It is a three-dimensional structure schematic diagram of the conversion test part of the present invention.

[0073] Figure 12 It is a partial enlarged structure schematic diagram of the lighting contact switch and the self-test contact switch of the present invention.

[0074] Figure 13 It is a circuit connection structure schematic diagram of the lighting contact switch, the self-test contact switch and the battery compartment of the present invention.

[0075] The description of the reference numerals in the drawings is as follows:

[0076] 1. Movable metal contact cover; 2. Screw cap; 3. Pen hook socket frame; 4. Protruding extrusion part; 5. Switch pressing plate; 6. Electric pen housing; 7. Lower sealing part; 8. Lighting part;

[0077] 9. Multifunctional screwdriver bit; 901. Cylindrical socket; 902. Inverted triangular block; 903. Metal disc; 904. Limit protrusion; 905. Jack; 906. Rotating shaft; 907. Sliding groove; 908. Rotating connecting frame; 909. Fixed flat head; 910. Movable flat head; 911. Spring storage groove; 912. Clamping spring; 913. Shrinkage groove;

[0078] 9101. Pulling rod; 9102. Tapered socket part; 9103. Limit support disc; 9104. Conversion spring; 9105. Connecting column body; 9106. Flat head main body part; 9107. Flat head movable adjustment part; 9108. Movable socket plate; 9109. Adjusting spring; 9110. Movable socket groove; 9111. Fixed socket column; 9112. Docking groove; 9113. Up and down sliding column groove; 9114. Up and down sliding column rod;

[0079] 10. Socket hole; 11. Metal rod; 12. Conductive spring; 13. Switch groove; 14. Adjusting gear;

[0080] 15. Conversion test part; 151. Upper conductive disc; 152. Cable through hole; 153. Neon tube; 154. Lower insulating disc; 155. Insulating gear; 156. Metal block;

[0081] 16. Resistor; 17. U-shaped support metal sheet; 18. Conductive ball head; 19. Support frame; 20. Limit ring;

[0082] 21. Lighting contact switch; 23. Self-test contact switch; 211. Conductive metal column; 212. Conductive metal sheet; 213. Rebound spring;

[0083] 22. Support spring; 24. Conductive disc; 25. Pressing spring; 26. Battery compartment. Detailed implementation manners

[0084] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0085] To achieve the above-mentioned invention object, as Figures 1-13 shown, the present invention provides a power test device, including an electric pen housing 6 and a rotary cover 2 screwed on the electric pen housing 6. A through hole is opened at the upper end of the rotary cover 2. An active metal contact cover 1 is movably arranged inside the rotary cover 2 and blocks the through hole on the rotary cover 2. A lower sealing part 7 is screwed at the lower end position of the electric pen housing 6. A metal rod 11 is screwed and arranged at the lower end position of the lower sealing part 7. Two limiting rings 20 are arranged inside the electric pen housing 6. A conversion type test part 15 is arranged between the two limiting rings 20. A conductive spring 12 is arranged inside the electric pen housing 6 and at the upper end position of the conversion type test part 15. The upper end of the conductive spring 12 is connected to a conductive disc 24. A resistor 16 is arranged inside the electric pen housing 6 and at the bottom end position of the lowermost limiting ring 20. Among them, the resistor 16 is electrically connected to the metal rod 11 through a U-shaped support metal sheet 17. A multi-functional screwdriver bit 9 is movably inserted at the lower end position of the metal rod 11;

[0086] In this embodiment, when a live test is required, the user only needs to hold the electric pen housing 6 and then press the active metal contact cover 1 with the thumb. At this time, only the multi-functional screwdriver bit 9 needs to be made to contact the component to be tested for live testing. When the component is live, the conversion type test part 15 inside the electric pen housing 6 will light up. When the component is not live, the conversion type test part 15 inside the electric pen housing 6 will not light up, thus realizing the test work of whether the component is live.

[0087] Preferably, through the arrangement of the two limiting rings 20, the conversion type test part 15 inside them can be limited up and down, thereby avoiding the up and down sliding of the conversion type test part 15.

[0088] Preferably, the electric pen housing 6 is made of ABS (acrylonitrile-butadiene-styrene copolymer), which has good insulation and transparency. While playing a protective role, it can timely observe the light emitted by the conversion type test part 15, thereby realizing the test observation of the electric pen.

[0089] Embodiment 1

[0090] As Figure 5 、 6As shown in the figure, the multi-functional screwdriver bit 9 includes a metal disc 903 and a cylindrical socket 901. The cylindrical socket 901 is fixedly installed at the upper end position of the metal disc 903. The limit protrusions 904 are fixedly installed at the front and rear end positions of the metal disc 903. A plurality of tapered slots are formed around the limit protrusions 904. A shaft hole is opened at the center position of the metal disc 903. The rotating shaft 906 is rotatably inserted into the shaft hole of the metal disc 903. The rotating connecting frame 908 is fixedly installed at the front and rear end positions on the lower side of the rotating shaft 906. A fixed flat screwdriver bit 909 is fixedly connected to the lower end of the rotating connecting frame 908. Sliding grooves 907 are respectively opened on the front and rear sides of the fixed flat screwdriver bit 909. The movable flat screwdriver bit 910 is inserted into the sliding grooves 907 of the fixed flat screwdriver bit 909 and can slide upward under the action of an upward extrusion force;

[0091] As Figure 7 , 10 shown in the figure, the movable flat screwdriver bit 910 includes a limit support disc 9103 and a tapered socket 9102. The tapered socket 9102 is fixedly installed at the upper end position of the limit support disc 9103. A pull rod 9101 is fixedly connected to the outside of the tapered socket 9102. The conversion spring 9104 is fixedly installed at the lower end position of the limit support disc 9103. The lower end of the conversion spring 9104 is connected to a connecting cylinder 9105. The flat screwdriver bit main body 9106 is fixedly installed at the lower end position of the connecting cylinder 9105. A docking groove 9112 with an opening downward is opened inside the flat screwdriver bit main body 9106;

[0092] In this embodiment, during the use of a daily electric pen, it is not only necessary to test whether the component is charged, but also necessary to screw and fasten the screws on the component. However, in some narrow spaces, it is very difficult for the electric pen to be inserted into the narrow space, so it is very difficult to screw the screws. Through the setting of the multi-functional screwdriver bit 9, this problem can be solved. When the electric pen is difficult to be inserted into the narrow space, the tapered socket 9102 can be pulled downward by the pull rod 9101. The tapered socket 9102 will compress the conversion spring 9104, and then the tapered socket 9102 will shrink into the fixed flat screwdriver bit 909. At this time, the tapered socket 9102 will be disengaged from the tapered slots on the limit protrusions 904. Then, the fixed flat screwdriver bit 909 and the movable flat screwdriver bit 910 can be rotated through the rotating shaft 906. When the fixed flat screwdriver bit 909 and the movable flat screwdriver bit 910 are rotated to a suitable angle, the pull rod 9101 can be released. At this time, the tapered socket 9102 will bounce upward under the action of the conversion spring 9104, and then be inserted into the tapered slots on the limit protrusions 904 again, thereby realizing the locking of the angle. Through this setting, the inclination angle of the multi-functional screwdriver bit 9 of the entire electric pen can be changed, so that the multi-functional screwdriver bit 9 can be inserted into a narrow space to realize the screwing of the screws on the component;

[0093] Preferably, a plurality of jacks 905 are provided at a position slightly lower than the periphery of the metal disc 903. A fixed insertion column 9111 is installed at the center of the upper end of the limit support disc 9103, and the fixed insertion column 9111 can be correspondingly inserted into the jacks 905. In this way, when the angle is adjusted, the fixed insertion column 9111 can contract together with the conical insertion part 9102. When the angle needs to be fixed, the fixed insertion column 9111 can also be inserted into the jacks 905. Through this double angle locking, the angle locking of the multi-functional screwdriver bit 9 is made more stable;

[0094] Moreover, the screws on daily components are generally slotted screws or cross-head screws. The multi-functional screwdriver bit 9 in this technical solution can also adaptively change according to the actual screw model. When screwing a cross-head screw, the fixed flat bit 909 and the movable flat bit 910 can form a cross-head bit and then be inserted into the cross-head screw for screwing. When screwing a slotted screw, the movable flat bit 910 will be compressed by the top of the slotted screw, thereby compressing the internal conversion spring 9104, and then the movable flat bit 910 will contract and move upward, so that the fixed flat bit 909 can be inserted into the slotted screw for screwing. Through this setting, whether it is a cross-head screw or a slotted screw encountered in daily life, the multi-functional screwdriver bit 9 can adaptively change and thus adapt to the screwing of different screws.

[0095] Preferably, inverted triangular blocks 902 are movably inserted on both sides of the cylindrical plug connector 901. Shrinkage grooves 913 are provided on the left and right sides of the cylindrical plug connector 901 corresponding to the inverted triangular blocks 902. A spring storage groove 911 is provided inside the inverted triangular block 902. The spring storage groove 911 and the shrinkage groove 913 together form a cavity for accommodating the clamping spring 912. Both ends of the clamping spring 912 are fixedly connected to the inner walls of the spring storage groove 911 and the shrinkage groove 913 respectively. A cross-shaped insertion hole 10 is provided at the bottom of the metal rod 11. The upper and lower parts of the insertion hole 10 are square holes, and the lower end is open. The two sides of the insertion hole 10 are cylindrical through holes. The cylindrical plug connector 901 can be inserted into the upper and lower square holes of the insertion hole 10, and the inverted triangular block 902 can be clamped into the cylindrical through holes on both sides of the insertion hole 10. When the cylindrical plug connector 901 is inserted into the insertion hole 10 of the metal rod 11, the inverted triangular block 902 will shrink into the shrinkage groove 913 under the action of extrusion force. When the cylindrical plug connector 901 is completely inserted into the insertion hole 10, the inverted triangular block 902 will protrude under the action of the clamping spring 912 and then be clamped inside the insertion hole 10. Through this kind of setting, when the multi-functional screwdriver bit 9 is worn or damaged, the inverted triangular block 902 can be inwardly squeezed by a tool (such as a flat screwdriver, etc.), so that the inverted triangular block 902 is completely retracted into the shrinkage groove 913. At this time, the multi-functional screwdriver bit 9 can be directly pulled out from the metal rod 11, thereby realizing the replacement of the multi-functional screwdriver bit 9.

[0096] Embodiment 2

[0097] As Figure 7 、 8 As shown in Fig. 9, the movable flat screwdriver 910 further includes a flat screwdriver movable adjustment part 9107. The flat screwdriver movable adjustment part 9107 is movably installed at both lower sides of the flat screwdriver main body part 9106, and a movable insertion plate 9108 is connected to the upper end of the flat screwdriver movable adjustment part 9107. A movable insertion groove 9110 is provided at the lower end of the flat screwdriver main body part 9106 corresponding to the movable insertion plate 9108. An adjustment spring 9109 is provided inside the movable insertion groove 9110. The upper and lower ends of the adjustment spring 9109 are fixedly connected to the bottom wall of the movable insertion groove 9110 and the top wall of the movable insertion plate 9108 respectively. The flat screwdriver movable adjustment part 9107 can elastically move up and down through the adjustment spring 9109;

[0098] In this embodiment, the fixed flat screwdriver 909 also includes the above structure;

[0099] In this embodiment, when screwing screws of different sizes, if the screw to be screwed is relatively large, the movable adjustment parts 9107 on the fixed flat screwdriver 909 and the movable flat screwdriver 910 will be flush with the bottom of the flat screwdriver main body part 9106 under the action of the adjustment spring 9109, so as to realize the screwing of the larger screw. When the screw to be screwed is relatively small, the movable adjustment part 9107 will contract upward under the extrusion of the screw tip, so that the flat screwdriver main body part 9106 can be directly inserted into the screw, and then realize the screwing of the smaller screw;

[0100] Preferably, the movable flat screwdriver 910 further includes an up-and-down sliding column rod 9114, which is fixedly installed at the inner side position of the flat screwdriver movable adjustment part 9107. The up-and-down sliding column groove 9113 is correspondingly opened on the outer side of the flat screwdriver main body part 9106. The flat screwdriver movable adjustment part 9107 can slide up and down inside the up-and-down sliding column groove 9113 of the flat screwdriver main body part 9106 through the up-and-down sliding column rod 9114. In this embodiment, the fixed flat screwdriver 909 also includes the above structure. In this way, through the setting of the up-and-down sliding column rod 9114 and the up-and-down sliding column groove 9113, the flat screwdriver main body part 9106 and the flat screwdriver movable adjustment part 9107 can form a unified plane, and thus the force-bearing effect is better.

[0101] In the above embodiment, each component of the multi-functional screwdriver bit 9 is made of high-strength steel (such as carbon manganese steel, bake hardening steel, high-strength interstitial free steel, high-strength low alloy steel, etc.), which can meet the temporary screwing and fastening of screws on daily components, and will not cause situations such as fracture directly due to screwing the screw.

[0102] Embodiment Three

[0103] Such as Figure 3 、 11As shown in the figure, the conversion test unit 15 includes an upper conductive disc 151. A plurality of neon tubes 153 are installed at the lower end position of the upper conductive disc 151, and the top ends of the neon tubes 153 are electrically connected to the upper conductive disc 151. Its lower insulating disc 154 is installed at the lower end position of the neon tubes 153, and an insulating gear 155 is provided at the lower end of the lower insulating disc 154. A cable through hole 152 is provided at the centers of the upper conductive disc 151, the lower insulating disc 154, and the insulating gear 155. A plurality of metal blocks 156 are installed at the bottom end position of the insulating gear 155, and the plurality of metal blocks 156 pass through the insulating gear 155 and the lower insulating disc 154 and are electrically connected to the corresponding neon tubes 153. A hemispherical groove is provided at the bottom of the metal block 156. A support frame 19 is fixedly provided inside the lowermost limit ring 20. A support spring 22 is provided at one side position of the upper end of the support frame 19. A conductive ball head 18 is connected to the upper end position of the support spring 22. The conductive ball head 18 can be elastically clamped inside the hemispherical groove provided on the lower side of the metal block 156. A cylindrical groove is provided on the side of the electric pen housing 6. An adjusting gear 14 is rotatably provided inside the cylindrical groove. The adjusting gear 14 freely rotates inside the cylindrical groove provided in the electric pen housing 6 through a rotating shaft. The inner side of the adjusting gear 14 meshes with the insulating gear 155 on the conversion test unit 15, and the outer side of the adjusting gear 14 protrudes outside the electric pen housing 6;

[0104] In this embodiment, by providing a plurality of neon tubes 153 in the conversion test unit 15, when a neon tube 153 is damaged, the conversion replacement of the neon tube 153 can be carried out in time, thereby avoiding the situation that the electric pen cannot be used temporarily. When conversion is required, the adjusting gear 14 can be rotated with a finger. The rotation of the adjusting gear 14 will drive the insulating gear 155 to rotate, so that the conductive ball head 18 at the bottom of the insulating gear 155 contacts the metal blocks 156 at the bottoms of different neon tubes 153, thereby realizing the connection of different neon tubes 153. Moreover, when the conductive ball head 18 is inserted into the hemispherical grooves of the metal blocks 156 at the bottoms of different neon tubes 153, the turning force of the adjusting gear 14 will increase, so that the adjustment situation of the adjusting gear 14 can be known, and the situation of failure to connect due to improper adjustment will not occur.

[0105] Preferably, the four sides of the metal block 156 are all sloped, so that the conductive ball head 18 can rotate better and be inserted into the hemispherical groove of the metal block 156.

[0106] Optionally, different color stickers can be attached to the plurality of neon tubes 153. In this way, when the neon tubes 153 are converted, the plurality of neon tubes 153 can emit different colors of light, so that it can be used by a single color-blind operator (for example, for a red-green color-blind operator, the neon tube 153 can be converted to other colors, such as purple).

[0107] Example 4

[0108] As Figure 2 、 13 shown, inside the pen housing 6 and on the inner side of the U-shaped support metal sheet 17, there is a battery compartment 26. At the lower side of the pen housing 6 and at the bottom end of the lower sealing part 7, there are multiple lighting parts 8, and the multiple lighting parts 8 are electrically connected to the battery compartment 26 through a power cord. On the other side of the pen housing 6, there is a switch groove 13, and inside the switch groove 13, there is a switch pressing plate 5. The switch pressing plate 5 is rotatably connected to the front and rear walls of the switch groove 13 through a rotating shaft. At the outer side and upper end position of the switch pressing plate 5, there is a convex pressing part 4. At the inner side and upper end position of the switch pressing plate 5, there is a lighting contact switch 21. At the inner side and lower end position of the switch pressing plate 5, there is a self-test contact switch 23;

[0109] In this embodiment, when pressing the upper end of the switch pressing plate 5, the lighting contact switch 21 will make contact and open, so that the battery compartment 26 can supply power to the multiple lighting parts 8, enabling the pen to have a lighting function and thus being able to detect the circuit in a situation with poor light;

[0110] Preferably, a pen hanging socket frame 3 is sleeved on the outer side and upper end position of the pen housing 6, and the pen hanging socket frame 3 can slide on the pen housing 6 under the action of an external force. When the pen hanging socket frame 3 slides to the position of the convex pressing part 4, it will continuously press the convex pressing part 4 inward. In this way, the lighting contact switch 21 can continuously make contact and open, so that the battery compartment 26 can continuously supply power to the lighting part, thus avoiding the need to keep pressing the lighting contact switch 21 and making the lighting more convenient.

[0111] When pressing the lower end of the switch pressing plate 5, the battery compartment 26 can supply power to the neon tube 153 on the conversion type testing part 15. At this time, through the power supply of the battery compartment 26, the self-test of the neon tube 153 can be realized, avoiding the occurrence of incorrect testing caused by the damage of the neon tube 153.

[0112] Preferably, a button battery is arranged inside the battery compartment 26 to realize power supply.

[0113] Preferably, in this embodiment, each circuit component is electrically connected through a power cable, and the outside of the power cable is wrapped with an insulating rubber sleeve, which will not cause interference to other components.

[0114] Optionally, the lighting part 8 is a lighting lamp bead, and the lamp bead can be realized by using existing technology lamp beads.

[0115] As Figure 12As shown in the figure, the lighting contact switch 21 and the self-test contact switch 23 include a conductive metal sheet 212. The conductive metal sheet 212 is fixed on the inner wall of the electric pen housing 6, and its conductive metal column 211 is fixed inside the groove formed on the inner side of the switch pressing plate 5 and passes through the other end of the electric pen housing 6 and is inserted into the interior of the electric pen housing 6. The return spring 213 is sleeved on the conductive metal column 211, and both ends are fixedly connected to the outer wall of the electric pen housing 6 and the inner wall of the switch pressing plate 5 respectively. When the lighting contact switch 21 and the self-test contact switch 23 are pressed respectively, the conductive metal column 211 will overcome the elastic force of the spring, so that the conductive metal column 211 contacts the conductive metal sheet 212, thus realizing the connection of the corresponding circuit.

[0116] Embodiment 5

[0117] As Figure 4 shown in the figure, a plurality of pressing springs 25 are connected around the bottom end of the movable metal contact cover 1 inside the screw cap 2. The bottom of the pressing spring 25 is connected with a support ring. When the screw cap 2 is screwed to the upper end position of the electric pen housing 6, the support ring will be in supporting contact with the top end of the electric pen housing 6, and at this time, the movable metal contact cover 1 and the conductive disc 24 at the upper end of the conductive spring 12 are in a separated state;

[0118] In this embodiment, when it is necessary to use the electric pen for detection, it is necessary to use a finger to press the movable metal contact cover 1, so that the movable metal contact cover 1 contacts the conductive disc 24 at the upper end of the conductive spring 12, thus realizing the connection of the circuit. Through this design, in case of electric shock, the finger will lose the continuous pressing force. At this time, the movable metal contact cover 1 will be separated from the conductive disc 24 under the action of the pressing spring 25, thus realizing the disconnection of the circuit, and further being able to achieve a certain protection effect.

[0119] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electric power testing device, characterized in that: include An electric pen housing (6) and a rotary cover (2) screwed onto the electric pen housing (6), wherein the upper end of the rotary cover (2) is provided with a through hole; A movable metal touch cover (1), the movable metal touch cover (1) is movably arranged inside the rotary cover (2) and blocks the through hole on the rotary cover (2); A lower sealing portion (7), the lower sealing portion (7) being screwed on the lower end of the electric pen housing (6); A metal rod (11), the metal rod (11) is screwed and installed at the lower end of the lower sealing part (7); Limiting rings (20), two limiting rings (20) are installed at internal positions of the electric pen housing (6), and a conversion test part (15) is arranged between the two limiting rings (20); A conductive spring (12), the conductive spring (12) is installed inside the electric pen housing (6) and is located at the upper end of the conversion test part (15), and the upper end of the conductive spring (12) is connected to a conductive disc (24); A resistor (16), the resistor (16) is installed inside the electric pen housing (6) and is located at the bottom end of the lowermost limiting ring (20), wherein the resistor (16) is connected to the metal rod (11) through a U-shaped supporting metal sheet (17); A multifunctional screwdriver head (9), the multifunctional screwdriver head (9) being movably plugged into the lower end of the metal rod (11); The multifunctional screwdriver head (9) can realize free conversion between a slotted screwdriver and a cross screwdriver, and can realize free adjustment of the angle.

2. An electric power testing device as claimed in claim 1, characterized in that: The multifunctional screwdriver head (9) comprises a metal disk (903); A cylindrical plug connector (901) is fixedly mounted at the upper end of a metal plate (903), inverted triangular blocks (902) are movably plugged into two sides of the cylindrical plug connector (901), and contraction grooves (913) are provided on the left and right sides of the cylindrical plug connector (901) corresponding to the inverted triangular blocks (902); A spring receiving groove (911) is provided inside the inverted triangle block (902), and the spring receiving groove (911) and the shrinking groove (913) together form a receiving chamber for accommodating the clamping spring (912), and the two ends of the clamping spring (912) are respectively fixedly connected to the inner walls of the spring receiving groove (911) and the shrinking groove (913); A limiting protrusion (904), the limiting protrusion (904) is fixedly installed at the front and rear ends of the metal plate (903), and a plurality of conical slots are formed around the limiting protrusion (904); A rotating shaft (906) is provided with an axial hole at the center of the metal disk (903), and the rotating shaft (906) is rotatably inserted into the axial hole of the metal disk (903); A rotating connecting frame (908) is fixedly mounted at the front and rear ends of the lower side of the rotating shaft (906), and a fixed straight-edge screw (909) is fixedly connected to the lower end of the rotating connecting frame (908); A plurality of insertion holes (905) are provided at the lower end of the metal plate (903); The front and rear sides of the fixed straight-line screwdriver (909) are respectively provided with sliding grooves (907); The movable straight-line lift (910) is inserted into the sliding groove (907) of the fixed straight-line lift (909) and can slide upward under the action of an upward extrusion force.

3. An electric power testing device as claimed in claim 2, characterized in that: A cross-shaped plug-in hole (10) is provided at the bottom of the metal rod (11). The plug-in hole (10) is square holes at the top and bottom, and the lower end is open. Both sides of the plug-in hole (10) are columnar through holes. The columnar plug connector (901) can be plugged into the upper and lower square holes of the plug-in hole (10), and the inverted triangle block (902) can be snapped into the columnar through holes on both sides of the plug-in hole (10).

4. An electric power testing device as claimed in claim 2, characterized in that: The movable straight lift (910) comprises a limiting support plate (9103); A conical plug-in portion (9102), the conical plug-in portion (9102) is fixedly mounted at the upper end of the limiting support plate (9103), and a pulling rod (9101) is fixedly connected to the outer side of the conical plug-in portion (9102); A fixed plug-in column (9111), which is fixedly installed at the center of the upper end of the limiting support plate (9103), and the fixed plug-in column (9111) can be correspondingly plugged into the inside of the plug hole (905); A conversion spring (9104), the conversion spring (9104) is fixedly mounted at the lower end of the limiting support plate (9103), and the lower end of the conversion spring (9104) is connected to a connecting column (9105); A straight-beam main body (9106), which is fixedly mounted at the lower end of the connecting column (9105), and a downwardly opening docking groove (9112) is provided inside the straight-beam main body (9106); A movable adjusting part (9107) of the straight-line lift, wherein the movable adjusting part (9107) of the straight-line lift is movably mounted at both sides of the lower end of the straight-line lift main body (9106), and the upper end of the movable adjusting part (9107) of the straight-line lift is connected to a movable plug-in board (9108); A movable plug-in slot (9110) is provided at the lower end of the main body (9106) of the straight-line screwdriver, corresponding to the movable plug-in plate (9108), and an adjusting spring (9109) is provided inside the movable plug-in slot (9110); The upper and lower ends of the adjusting spring (9109) are fixedly connected to the bottom wall of the movable plug-in slot (9110) and the top wall of the movable plug-in plate (9108) respectively, so that the movable adjusting part (9107) of the straight-acting crane can be elastically moved up and down through the adjusting spring (9109), thereby changing the bottom end size of the straight-acting crane main body (9106).

5. An electric power testing device as claimed in claim 4, characterized in that: The movable straight lift (910) further comprises an up-and-down sliding column rod (9114); The up-and-down sliding column rod (9114) is fixedly installed at the inner side of the movable adjustment part (9107) of the straight-acting lift; The outer side of the main body (9106) of the straight-line machine is provided with an up-and-down sliding column groove (9113) corresponding to the up-and-down sliding column rod (9114). The movable adjusting part (9107) of the straight-acting screwdriver can slide up and down inside the up and down sliding column groove (9113) of the straight-acting screwdriver main body (9106) through the up and down sliding column rod (9114).

6. The power testing device according to claim 1, characterized in that: The conversion test section (15) comprises an upper conductive disk (151); Neon tubes (153), wherein a plurality of neon tubes (153) are installed at the lower end of the upper conductive disk (151), and the top ends of the neon tubes (153) are electrically connected to the upper conductive disk (151); A lower insulating disk (154), wherein the lower insulating disk (154) is installed at the lower end of the neon tube (153), and an insulating gear (155) is provided at the lower end of the lower insulating disk (154); A cable passing hole (152) is provided at the center of the upper conductive disk (151), the lower insulating disk (154) and the insulating gear (155); Metal blocks (156), multiple metal blocks (156) are installed at the bottom end of the insulating gear (155), and the multiple metal blocks (156) pass through the insulating gear (155), the lower insulating disk (154) and are electrically connected to the corresponding neon tubes (153); A hemispherical groove is provided at the bottom of the metal block (156), and the four sides of the metal block (156) are all arranged in a slope shape.

7. An electric power testing device as claimed in claim 6, characterized in that: A support frame (19) is fixedly arranged inside the limiting ring (20) at the bottom, and a support spring (22) is arranged at one side of the upper end of the support frame (19). A conductive ball head (18) is connected to the upper end of the support spring (22), and the conductive ball head (18) can be elastically clamped in the interior of a hemispherical groove opened on the lower side of the metal block (156).

8. An electric power testing device as claimed in claim 7, characterized in that: A cylindrical groove is provided on the side of the electric pen housing (6), and an adjusting gear (14) is rotatably provided inside the cylindrical groove. The adjusting gear (14) freely rotates inside the cylindrical groove provided in the electric pen housing (6) via a rotating shaft. The inner side of the adjusting gear (14) is meshed with an insulating gear (155) on the conversion test part (15), and the outer side of the adjusting gear (14) protrudes outside the electric pen housing (6).

9. The power testing device according to claim 1, characterized in that: A battery compartment (26) is provided inside the electric pen housing (6) and on the inner side of the U-shaped supporting metal sheet (17); a plurality of lighting units (8) are provided on the lower side of the electric pen housing (6) and on the bottom end of the lower sealing unit (7); the plurality of lighting units (8) are electrically connected to the battery compartment (26) via power lines; a switch groove (13) is provided on the other side of the electric pen housing (6); a switch pressing plate (5) is provided inside the switch groove (13); the switch pressing plate (5) is rotatably connected to the front and rear walls of the switch groove (13) via a rotating shaft; a protruding pressing portion (4) is provided at the upper end of the outer side of the switch pressing plate (5); a lighting contact switch (21) is provided at the upper end of the inner side of the switch pressing plate (5); and a self-test contact switch (23) is provided at the lower end of the inner side of the switch pressing plate (5); The lighting contact switch (21) and the self-test contact switch (23) include a conductive metal sheet (212), and the conductive metal sheet (212) is fixed on the inner wall of the electric pen housing (6); A conductive metal column (211), wherein the conductive metal column (211) is fixed inside a groove formed on the inner side of the switch pressing plate (5), and the other end of the conductive metal column (211) passes through the electric pen housing (6) and is inserted into the interior of the electric pen housing (6); The rebound spring (213) is sleeved on the conductive metal column (211), and the two ends of the rebound spring (213) are respectively fixedly connected to the outer wall of the electric pen housing (6) and the inner wall of the switch pressing plate (5).

10. The power testing device according to claim 1, characterized in that: A plurality of pressing springs (25) are connected inside the rotary cover (2) and at positions around the bottom of the movable metal touch cover (1). The bottom of the pressing spring (25) is connected to a supporting ring. When the rotary cover (2) is screwed to the upper end of the electric pen housing (6), the supporting ring will contact the top support of the electric pen housing (6), and at this time, the movable metal touch cover (1) and the conductive disc (24) at the upper end of the conductive spring (12) are in a separated state. A pen hanging sleeve frame (3) is sleeved at the upper end of the outer side of the electric pen housing (6). The pen hanging sleeve frame (3) can slide on the electric pen housing (6) under the action of external force. When the pen hanging sleeve frame (3) slides to the position of the protruding pressing part (4), it will continuously press the protruding pressing part (4) inwards.

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