Circuit on-off detection tool

Abstract

The invention discloses a circuit on-off detection tool, and particularly relates to the technical field of detection tools, the circuit on-off detection tool comprises a base, the top end of the base is provided with a mounting rack, the top of the base is provided with a moving cylinder, the moving cylinder is arranged on the mounting rack, and a piston rod of the moving cylinder faces downwards in the use process. A detachable pressing plate is arranged at the bottom end of a piston rod of the moving air cylinder, a lifting assembly and a conversion plate are arranged at the top end of the base, the conversion plate is located below the lifting assembly, the lifting assembly and the conversion plate are both located on the front side of the mounting frame, and the lifting assembly comprises a positioning plate. According to the invention, the moving cylinder pushes the product to move, so that the contact of the product is in contact with the contact probe, and the position of the contact probe is fixed, thereby reducing the probability of puncture caused by the contact probe, improving the safety in the detection process, ensuring that the detection speed does not affect the safety, and ensuring the detection efficiency. And the detection efficiency and the detection safety are both considered.

Description

Technical Field

[0001] The present invention relates to the technical field of detection tooling, and specifically relates to a circuit continuity detection tooling. Background Art

[0002] For the normal operation and use of electrical products, their internal circuits are crucial. Therefore, during the production of electrical products and subsequent maintenance and repair processes, it is necessary to conduct standardized detection of circuit continuity.

[0003] Traditional circuit detection generally requires manual operation, where the electric pen of an ammeter is contacted with the corresponding positions on the product, and the continuity of the circuit is reflected by the readings of the ammeter. However, manual inspection is slow and inefficient. Nowadays, circuit detection can already be completed through professional detection equipment, such as a circuit board continuity detection tooling with the publication number CN218512601U in the prior art.

[0004] In the prior art, generally, a telescopic structure is used to push the probe to move. The probe functions the same as the electric pen in the traditional method. When the probe contacts the corresponding position of the electrical appliance, the detection result can be obtained, such as a circuit board continuity detection tooling with the publication number CN222087802U.

[0005] As the name implies, the probe is similar in shape to a needle. Because of this, the probe has a certain degree of danger. Especially during the detection process, the probe is in a moving state and its position changes at all times. Therefore, during manual operation, it is not easy for the operator to avoid, and it is more likely to cause stabbing injuries. If the movement speed of the probe is reduced for this reason, although the safety can be improved, the detection efficiency will be reduced. Therefore, it is difficult to balance safety and efficiency. Summary of the Invention

[0006] The purpose of the present invention is to provide a circuit continuity detection tooling. By using a moving cylinder to push the product to move while the position of the contact probe remains unchanged, the probability of being stabbed by the contact probe is reduced, the safety during the detection process is improved, and the detection efficiency is ensured. The detection efficiency and safety are balanced.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A circuit continuity detection tooling, including a base, an installation frame is provided at the top of the base, a moving cylinder is provided on the top of the base, the moving cylinder is arranged on the installation frame, the piston rod of the moving cylinder faces downward during use, a detachable pressing plate is provided at the bottom end of the piston rod of the moving cylinder, and a plurality of pressing columns are fixedly provided at the bottom end of the pressing plate;

[0008] A lifting component and a conversion board are provided at the top of the base. The conversion board is located below the lifting component. Both the lifting component and the conversion board are located on the front side of the mounting frame. The lifting component includes a positioning plate. A plurality of through holes penetrating the positioning plate are provided on the positioning plate. The positioning plate is located directly below the pressing plate. Rebound components for rebounding the lifting component are provided at the four corners of the lifting component.

[0009] A plurality of groups of contact probes are provided at the top of the conversion board. The contact probes can be detachably separated from the conversion board. Each group of contact probes corresponds to a through hole. The contact probes are located directly below the corresponding through holes. A display screen for displaying parameters is provided on the mounting frame.

[0010] Furthermore, a plurality of wires are fixedly provided at the bottom end of the conversion board. The wires are electrically connected to the contact probes. Guide rods penetrating the conversion board are provided at the four corners of the conversion board. The bottom ends of the guide rods are fixedly connected to the top end of the base.

[0011] Buffer springs are provided at the outer ends of the guide rods. The two ends of the buffer springs are respectively fixedly connected to the bottom end of the conversion board and the top end of the base. A corrugated pipe with a protective function is sleeved on the outer end of the contact probe. Only a small part of the top end of the contact probe is exposed outside the corrugated pipe.

[0012] Furthermore, a support frame is provided at the bottom end of the positioning plate through a hinge. The positioning plate can be rotated backward and lifted. A protrusion is fixedly provided on the front side of the support frame. A fixing piece is rotatably connected to the top end of the protrusion. When the positioning plate and the support frame are combined, the fixing piece extends to the top end of the positioning plate. A plurality of threaded insertion rods are fixedly provided at the bottom end of the support frame. A limiting sleeve for support is sleeved on the bottom end of the threaded insertion rod through a thread.

[0013] Furthermore, the rebound component includes two mounting heads. The two mounting heads are symmetrically arranged up and down. A telescopic reset rod and a reset spring are provided between the two mounting heads. The two mounting heads are connected to each other through the telescopic reset rod and the reset spring. The reset spring is provided at the outer end of the telescopic reset rod. Mounting sleeves are sleeved on the outer ends of the two mounting heads. The two mounting sleeves are respectively fixed to the bottom end of the support frame and the top end of the base. A positioning pin penetrating the mounting head and the mounting sleeve is provided on the mounting sleeve. Inner insertion holes penetrating the mounting head are provided on the mounting head. Two outer insertion holes are provided on the mounting sleeve. When the two outer insertion holes are respectively aligned with the two ends of the inner insertion hole, the positioning pin is inserted into them.

[0014] Furthermore, two protective covers are provided at the top end of the base. The two protective covers are symmetrically arranged left and right. The conversion board is located between the two protective covers. After the two protective covers are combined, the conversion board is covered therein. Sealing strips are fixedly provided on the sides of the two protective covers facing the conversion board. The bottom end of the protective cover is in contact with the top end of the base. A detachable storage cover is provided at the top end of the conversion board. Activated carbon is placed inside the storage cover. A ventilation net is inlaid at the top end of the storage cover.

[0015] Two inclined blocks are fixedly provided at the top of the protective cover, and guide rollers are provided at both sides of the support frame. The inclined blocks can contact the guide rollers on the corresponding side.

[0016] Furthermore, each protective cover is provided with a slider on both sides, the slider is slidably connected to the top of the base, a connecting plate is provided between the slider and the protective cover, both ends of the connecting plate are respectively connected to the protective cover and the slider by bolts, a driving arm is hinged on the top of the protective cover, two side plates are fixed on the top of the pressure plate, and the tops of the two driving arms are respectively hinged to the two side plates.

[0017] Further, the mounting frame includes a U-shaped frame, the bottom end of the U-shaped frame is fixed with two columns connected to the top of the base, the display screen is installed on one side of one of the columns, a fixed seat is rotatably connected to the inner wall of the U-shaped frame, and a hand wheel capable of driving the fixed seat to rotate is provided on one side of the U-shaped frame;

[0018] An extension arm is fixedly provided at the outer end of the fixing seat, the motion cylinder is detachably provided at one end of the extension arm away from the fixing seat, and a fastening bolt for fixing the fixing seat is threadedly provided at the bottom end of the U-shaped frame.

[0019] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0020] 1. The product is pushed to move by the motion cylinder, so that the contact of the product contacts the contact probe, while the contact probe remains in place, thus reducing the probability of puncture caused by the contact probe and improving the safety during the detection process. The detection speed does not affect the safety, thus ensuring the detection efficiency, and taking both the efficiency and safety of the detection into account;

[0021] 2. Two protective covers are set under the lifting assembly, which can be automatically opened and closed during the detection process by raising and lowering the pressure plate. The contact probes are sealed and protected before use or when idle in daily life to prevent operators from accidentally touching the contact probes and causing injuries, further improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is the overall structure diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of the separated state of the motion cylinder of the present invention;

[0025] Figure 3 For the present invention Figure 2 Enlarged view of part A in

[0026] Figure 4 Cross-sectional view of the lifting component, protective cover and conversion board of the present invention

[0027] Figure 5 Structural diagram of the pressing plate and protective cover of the present invention

[0028] Figure 6 Bottom view structural diagram of the lifting component of the present invention

[0029] Figure 7 Schematic diagram of the positioning plate in the lifted state of the present invention

[0030] Figure 8 Exploded view of the elastic return component of the present invention

[0031] Figure 9 Top view structural diagram of the conversion board of the present invention

[0032] Figure 10 Bottom view structural diagram of the conversion board of the present invention

[0033] Figure 11 For the present invention Figure 9 Enlarged view of part B in

[0034] Figure 12 Bottom view structural diagram of the mounting bracket of the present invention

[0035] Explanation of reference numerals in the drawings:

[0036] 1. Base; 2. Lifting component; 201. Positioning plate; 202. Support frame; 203. Guide roller; 204. Limiting sleeve; 205. Through hole; 206. Fixed piece; 3. Mounting bracket; 301. Column; 302. U-shaped frame; 303. Fixed seat; 304. Extension arm; 4. Display screen;

[0037] 5. Moving cylinder; 6. Pressing plate; 7. Protective cover; 701. Connecting plate; 702. Slide block; 703. Sealing strip; 704. Inclined block; 8. Driving arm; 9. Conversion board; 901. Contact probe; 902. Guide rod; 903. Storage cover; 904. Bellows; 905. Buffer spring; 10. Side plate; 11. Elastic return component; 1101. Telescopic reset rod; 1102. Reset spring; 1103. Mounting head; 1104. Mounting sleeve; 1105. Positioning pin. Detailed implementation manners

[0038] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] The present invention provides a circuit on-off detection tooling as follows Figures 1 - 12 shown, including a base 1, on the top of the base 1 is provided with a mounting frame 3, on the top of the base 1 is provided with a moving air cylinder 5, the moving air cylinder 5 is arranged on the mounting frame 3, the piston rod of the moving air cylinder 5 faces downward during use, and at the bottom end of the piston rod of the moving air cylinder 5 is provided with a detachable pressing plate 6, and a plurality of pressing columns are fixedly arranged at the bottom end of the pressing plate 6;

[0040] On the top of the base 1 are provided with a lifting assembly 2 and a conversion plate 9, the conversion plate 9 is located below the lifting assembly 2, and both the lifting assembly 2 and the conversion plate 9 are located on the front side of the mounting frame 3. The lifting assembly 2 includes a positioning plate 201, and a plurality of through holes 205 penetrating through the positioning plate 201 are opened on the positioning plate 201. The positioning plate 201 is located directly below the pressing plate 6, and at the four corners of the lifting assembly 2 are provided with spring-back assemblies 11 for making the lifting assembly 2 spring back;

[0041] On the top of the conversion plate 9 are provided with multiple groups of contact probes 901, the contact probes 901 can be detachably separated from the conversion plate 9, each group of contact probes 901 corresponds to a through hole 205, the contact probes 901 are located directly below the corresponding through holes 205, and on the mounting frame 3 is provided with a display screen 4 for displaying parameters.

[0042] During detection, the product to be detected is placed on the top of the positioning plate 201. The positioning plate 201 can standardize the position of the product, so that the contacts of the circuit on the product are aligned with each group of contact probes 901 downward through the through holes 205. Subsequently, the moving air cylinder 5 is turned on, and the piston rod of the moving air cylinder 5 extends downward and pushes the pressing plate 6 to move downward. The pressing plate 6 moves downward and contacts the product, and pushes the product to move downward. The moving product pushes the lifting assembly 2 to move downward. With the movement of the lifting assembly 2, the spring-back assembly 11 is compressed. The lifting assembly 2 moves downward, so that the product gradually approaches the conversion plate 9 and the contact probes 901 on the conversion plate 9. Finally, the top ends of the contact probes 901 pass through the through holes 205 and contact the contacts of the circuit on the product. After contact, the product to be detected is connected to the detection circuit, and relevant parameters such as current and voltage in the circuit are displayed on the display screen 4. Based on this, it is judged whether there is a short circuit in the product circuit and whether it is qualified. The built-in controller and detection unit of this detection tooling can receive the electrical signals in the detection circuit and process the electrical signals and display them in digital form on the display screen 4;

[0043] After detection, the moving cylinder 5 drives the pressure plate 6 to move upward. The spring-back component 11 also pushes the lifting component 2 to spring back to its original position under the action of elastic force. Finally, the product at the top of the positioning plate 201 is taken off to complete the detection. This detection method moves the product while the position of the contact probe 901 remains unchanged. Therefore, the probability of the contact probe 901 causing stabbing is reduced, the safety during the detection process is improved, there is no need to reduce the downward pressure speed to balance safety, the detection efficiency is not affected, and the contact probe 901 can be disassembled and separated from the conversion board 9, and it can be conveniently disassembled and replaced after the contact probe 901 is damaged.

[0044] During the use of the contact probe 901, buffering is required to avoid damage to the contact probe 901. For example Figures 9 - 11 As shown, a plurality of wires are fixedly provided at the bottom end of the conversion board 9. The wires are electrically connected to the contact probe 901. Guide rods 902 penetrating through the conversion board 9 are provided at the four corners of the conversion board 9. The bottom ends of the guide rods 902 are fixedly connected to the top end of the base 1;

[0045] Buffer springs 905 are provided at the outer ends of the guide rods 902. The two ends of the buffer springs 905 are respectively fixedly connected to the bottom end of the conversion board 9 and the top end of the base 1. A bellows 904 with a protective function is sleeved on the outer end of the contact probe 901, and a small part of the top end of the contact probe 901 is exposed outside the bellows 904.

[0046] During the detection process, when the product moves downward and contacts the contact probe 901, the downward pressure of the product will be applied downward on the contact probe 901, and then the conversion board 9 will be pushed downward, causing the conversion board 9 to slide downward along the guide rod 902, and the buffer spring 905 will also be compressed accordingly. This makes the contact probe 901 in close contact with the corresponding position of the product to ensure the success of the detection. At the same time, the elastic force of the buffer spring 905 also plays a buffering role to avoid damage to the contact probe 901 due to excessive pressure;

[0047] By wrapping the bellows 904 around the outer end of the contact probe 901, and only the top end of the contact probe 901 extends outside the bellows 904, and the rest is wrapped in the bellows 904, the contact probe 901 can be protected, the oxidation of the contact probe 901 is delayed, the service life is improved, and the bellows 904 can also be telescopically adjusted to control the length of the contact probe 901 extending outside.

[0048] For the convenience of overhauling the components on the conversion board 9, such as Figures 6 - 7As shown, a support frame 202 is provided at the bottom end of the positioning plate 201 through a hinge. The positioning plate 201 can be rotated backward and lifted up. A protrusion is fixedly provided on the front side of the support frame 202. The top end of the protrusion is rotatably connected to a fixing piece 206. When the positioning plate 201 and the support frame 202 are combined, the fixing piece 206 extends to the top end of the positioning plate 201. A plurality of threaded insertion rods are fixedly provided at the bottom end of the support frame 202. A limiting sleeve 204 for supporting is sleeved on the bottom end of the threaded insertion rod through a thread.

[0049] During the detection process, the product is pushed downward by the pressing plate 6, thereby driving the entire lifting assembly 2 to move downward. However, if the lifting assembly 2 moves downward excessively, it will squeeze the conversion plate 9 and easily cause damage to the components on the conversion plate 9. Therefore, the limiting sleeve 204 is provided. By rotating the limiting sleeve 204, the extension length of the limiting sleeve 204 below the support frame 202 is adjusted. After the lifting assembly 2 moves downward to a certain extent, the limiting sleeve 204 can support on the top end of the base 1, preventing the lifting assembly 2 from moving downward further, thereby preventing the lifting assembly 2 from moving downward excessively.

[0050] In the use state, the positioning plate 201 is combined on the top end of the support frame 202, and the fixing piece 206 is rotated to lock the two. Since the conversion plate 9 is hidden below the lifting assembly 2 and is inconvenient for maintenance, at this time, the fixing piece 206 can be rotated to release its locking of the positioning plate 201, and then the positioning plate 201 is rotated backward and lifted upward, so as to expose the conversion plate 9 below the lifting assembly 2, which is convenient for maintaining the conversion plate 9 and the components on the conversion plate 9.

[0051] During the working process, it is necessary to control the rebound of the lifting assembly 2. As Figures 6 - 8 shown, the rebound assembly 11 includes two mounting heads 1103, which are symmetrically arranged up and down. An expansion and reset rod 1101 and a reset spring 1102 are provided between the two mounting heads 1103. The two mounting heads 1103 are connected to each other through the expansion and reset rod 1101 and the reset spring 1102. The reset spring 1102 is provided at the outer end of the expansion and reset rod 1101. Mounting sleeves 1104 are sleeved on the outer ends of the two mounting heads 1103 respectively. The two mounting sleeves 1104 are respectively fixed at the bottom end of the support frame 202 and the top end of the base 1. A positioning pin 1105 passing through the mounting head 1103 and the mounting sleeve 1104 is provided on the mounting sleeve 1104. Inner insertion holes passing through the mounting head 1103 are opened on the mounting head 1103. Two outer insertion holes are opened on the mounting sleeve 1104. When the two outer insertion holes are respectively aligned with the two ends of the inner insertion hole, the positioning pin 1105 is inserted therein.

[0052] Four resilient components 11 are respectively installed and fixed at the four corners of the lifting component 2. The main body of the resilient component 11 is a telescopic reset rod 1101 and a reset spring 1102. The telescopic movement of the telescopic reset rod 1101 can control the vertical up-and-down movement of the lifting component 2, and the reset spring 1102 provides elastic force for the reset of the lifting component 2. The mounting head 1103, the mounting sleeve 1104 and the positioning pin 1105 play a connecting role, installing and fixing the resilient component 11 between the lifting component 2 and the base 1, and being able to adjust and replace the specification of the reset spring 1102 according to the detected product weight, ensuring that the elastic force of the resilient component 11 is sufficient to push the lifting component 2 and the product to rebound after detection.

[0053] When not in use, the contact probe 901 needs to be protected, such as Figure 1 、 Figures 3 - 6 、 Figure 9 shown. Two protective covers 7 are provided at the top of the base 1. The two protective covers 7 are symmetrically arranged left and right. The conversion board 9 is located between the two protective covers 7. After the two protective covers 7 are combined, the conversion board 9 is covered therein. Sealing strips 703 are fixedly provided on one side of the two protective covers 7 facing the conversion board 9. The bottom end of the protective cover 7 is in contact with the top end of the base 1. A detachable storage cover 903 is provided at the top of the conversion board 9. Activated carbon is placed inside the storage cover 903, and a breathable net is inlaid at the top of the storage cover 903;

[0054] Two inclined blocks 704 are fixedly provided at the top of the protective cover 7. Guide rollers 203 are provided on both sides of the support frame 202. The inclined blocks 704 can contact the corresponding guide rollers 203.

[0055] Sliding blocks 702 are provided on both sides of each protective cover 7. The sliding blocks 702 are slidably connected to the top end of the base 1. A connecting plate 701 is provided between the sliding blocks 702 and the protective cover 7. Both ends of the connecting plate 701 are bolted to the protective cover 7 and the sliding blocks 702 respectively. A driving arm 8 is hinged at the top of the protective cover 7. Two side plates 10 are fixedly provided at the top of the pressing plate 6. The top ends of the two driving arms 8 are respectively hinged to the two side plates 10.

[0056] Before the pressing plate 6 presses down, it is in the initial position. At this time, the two protective covers 7 are also in the combined state. After combination, the protective cover 7 is located below the lifting component 2. The protective cover 7 and the lifting component 2 at its bottom jointly enclose a closed space, enclosing the conversion plate 9 and the components on the conversion plate 9 in this space, thereby protecting the contact probe 901 by enclosing it before use or during daily idle time. First, it prevents operators from accidentally touching the contact probe 901 and causing stabbing. Second, it isolates the external environment, delays the oxidation and corrosion of the contact probe 901, prevents the contact probe 901 from being worn, and improves the service life of the contact probe 901. When the conversion plate 9 is enclosed inside the protective cover 7, the activated carbon inside the storage cover 903 will absorb the moisture in this closed space through the breathable net, keeping the inside of this space dry and preventing the moisture from eroding the contact probe 901;

[0057] At the same time, when the protective cover 7 is in the combined state, the inclined block 704 contacts the corresponding guiding roller 203 and generates a lifting force on the guiding roller 203, causing the elastic return component 11 to be stretched and the lifting component 2 to be slightly lifted, thereby playing a supporting role for the lifting component 2, making the lifting component 2 unable to be pressed down before use or during daily idle time, and further preventing injury caused by accidentally touching the lifting component 2 and triggering the contact probe 901, further improving safety. At the same time, since the lifting component 2 cannot move downward before use, when the product is placed on the top of the lifting component 2, the lifting component 2 will not vibrate due to the elastic return component 11, improving the stability after the product is placed;

[0058] After the moving cylinder 5 pushes the pressing plate 6 to press down, the pressing plate 6 moves downward and pushes the driving arm 8. Under the thrust of the driving arm 8, the two protective covers 7 move away from each other. The sliding block 702 slides under the drive of the protective cover 7. After the two protective covers 7 are separated, the conversion plate 9 is exposed, and at the same time, the support for the lifting component 2 is automatically released, enabling the lifting component 2 and the conversion plate 9 to automatically perform the detection work. During this process, in order to reduce the friction between the protective cover 7 and the base 1, lubricating oil can be applied to the bottom of the protective cover 7 or the top of the lifting component 2. After the detection is completed, the pressing plate 6 moves upward, pulling the driving arm 8 upward, and can automatically pull the protective cover 7 to return to the combined state again. During the combination process, the ramp-shaped inclined block 704 moves below the lifting component 2, lifting the lifting component 2 upward again and supporting the lifting component 2 again, and so on in a cycle, automatically adjusting and controlling the state of the protective cover 7 along with the detection process.

[0059] In order to support and fix the moving cylinder 5 and facilitate its maintenance, such as Figure 1 、 2, as shown in Fig. 12, the mounting bracket 3 includes a U-shaped bracket 302. Two columns 301 connected to the top end of the base 1 are fixedly provided at the bottom end of the U-shaped bracket 302. The display screen 4 is installed on one side of one of the columns 301. A fixed seat 303 is rotatably connected to the inner wall of the U-shaped bracket 302. A handwheel capable of driving the fixed seat 303 to rotate is provided on one side of the U-shaped bracket 302;

[0060] An extension arm 304 is fixedly provided at the outer end of the fixed seat 303. The moving cylinder 5 is detachably arranged at one end of the extension arm 304 away from the fixed seat 303. A fastening bolt for fixing the fixed seat 303 is provided at the bottom end of the U-shaped bracket 302 through threads. Tightening the fastening bolt can fix the fixed seat 303 and make it unable to rotate.

[0061] When the moving cylinder 5 needs to be overhauled, or when the tooling is idle for a long time, the moving cylinder 5 and the pressing plate 6 can be disassembled and separated, and the fixed seat 303 can be rotated, thereby driving the moving cylinder 5 to adjust the moving cylinder 5 to a separated state. At this time, the piston rod of the moving cylinder 5 faces forward, and the moving cylinder 5 is separated from the pressing plate 6 at this time. Controlling the telescopic movement of the moving cylinder 5 during the overhaul process will not trigger the pressing plate 6, making the overhaul and maintenance more convenient.

[0062] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A circuit on / off detection tooling, including a base (1), wherein an installation frame (3) is provided at the top of the base (1), and it is characterized in that: A moving cylinder (5) is provided at the top of the base (1), and a detachable pressing plate (6) is provided at the bottom end of the piston rod of the moving cylinder (5); A lifting assembly (2) and a conversion plate (9) are provided at the top end of the base (1). The conversion plate (9) is located below the lifting assembly (2). The lifting assembly (2) includes a positioning plate (201). A plurality of through holes (205) penetrating the positioning plate (201) are formed in the positioning plate (201). The positioning plate (201) is located directly below the pressing plate (6). Rebound assemblies (11) for rebounding the lifting assembly (2) are provided at the four corners of the lifting assembly (2); A plurality of groups of contact probes (901) are provided at the top end of the conversion plate (9). Each group of contact probes (901) corresponds to a through hole (205). The contact probes (901) are located directly below the corresponding through holes (205). A display screen (4) for displaying parameters is provided on the mounting bracket (3).

2. The circuit on / off detection tooling according to claim 1, wherein: A plurality of wires are fixedly provided at the bottom end of the conversion plate (9). Guide rods (902) penetrating the conversion plate (9) are provided at the four corners of the conversion plate (9). The bottom ends of the guide rods (902) are fixedly connected to the top end of the base (1); A buffer spring (905) is provided at the outer end of the guide rod (902). The two ends of the buffer spring (905) are respectively fixedly connected to the bottom end of the conversion plate (9) and the top end of the base (1). A corrugated pipe (904) with a protective effect is sleeved on the outer end of the contact probe (901).

3. The circuit on-off detection tooling according to claim 1, wherein: A support frame (202) is provided at the bottom end of the positioning plate (201) through a hinge. A protrusion is fixedly provided on the front side of the support frame (202). A fixing piece (206) is rotatably connected to the top end of the protrusion. The fixing piece (206) extends to the top end of the positioning plate (201). A plurality of threaded insertion rods are fixedly provided at the bottom end of the support frame (202). A limiting sleeve (204) for supporting is sleeved on the bottom end of the threaded insertion rod through a thread.

4. The circuit on / off detection tooling according to claim 3, characterized in that: The rebound assembly (11) includes two mounting heads (1103). A telescopic reset rod (1101) and a reset spring (1102) are provided between the two mounting heads (1103). Mounting sleeves (1104) are sleeved on the outer ends of the two mounting heads (1103). The two mounting sleeves (1104) are respectively fixed to the bottom end of the support frame (202) and the top end of the base (1). A positioning pin (1105) penetrating the mounting head (1103) and the mounting sleeve (1104) is provided on the mounting sleeve (1104).

5. The circuit on / off detection tooling according to claim 3, wherein: Two protective covers (7) are provided at the top end of the base (1). The conversion plate (9) is located between the two protective covers (7). Sealing strips (703) are fixedly provided on the sides of the two protective covers (7) facing the conversion plate (9). The bottom end of the protective cover (7) is in contact with the top end of the base (1). A detachable storage cover (903) is provided at the top end of the conversion plate (9); Two inclined blocks (704) are fixedly provided at the top end of the protective cover (7). Guide rollers (203) are provided on both sides of the support frame (202).

6. The circuit on-off detection tooling according to claim 5, wherein: Sliders (702) are provided on both sides of each protective cover (7). The sliders (702) are slidably connected to the top end of the base (1). A connecting plate (701) is provided between the sliders (702) and the protective cover (7). The top end of the protective cover (7) is hinged with a driving arm (8). Two side plates (10) are fixedly provided at the top end of the pressing plate (6). The top ends of the two driving arms (8) are respectively hinged with the two side plates (10).

7. The circuit on-off detection tooling according to claim 1, wherein: The mounting bracket (3) includes a U-shaped frame (302). Two columns (301) connected to the top end of the base (1) are fixedly provided at the bottom end of the U-shaped frame (302). A fixed seat (303) is rotatably connected to the inner wall of the U-shaped frame (302). An extension arm (304) is fixedly provided at the outer end of the fixed seat (303). The moving cylinder (5) is detachably provided at one end of the extension arm (304) away from the fixed seat (303). A fastening bolt for fixing the fixed seat (303) is provided at the bottom end of the U-shaped frame (302).

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