CN219349106U - Switching device for circuit test - Google Patents

Abstract

The utility model discloses a switching device for circuit testing, which relates to the technical field of circuit plug testing and comprises a bottom plate, a jack adjusting and switching unit and a plug compressing unit; the bottom plate is rectangular; the jack adjusting and switching unit comprises a first screw rod, a first rectangular supporting plate, a limiting block, a first sliding column, a motor supporting plate, a motor, a second rectangular supporting plate, a second sliding column, a sliding block, a movable supporting plate, a second screw rod, a first bearing, a first rotating shaft, a movable jack, a contact conductive torch, a fixed block, a fixed jack, a grounding conductive torch and a second bearing. The jack can be conveniently adjusted and switched to a proper position according to the positions of the pins on the plugs with different specifications, so that the jack is conveniently used for testing circuits of different plugs, and the plugs can be conveniently fastened after the pins on the plugs are inserted into the jacks, so that the plugs are prevented from loosening during testing the circuits of the plugs.

Description

Switching device for circuit test

Technical Field

The utility model relates to the technical field of circuit plug testing, in particular to a switching device for circuit testing.

Background

The different standards executed during the production of plugs in different countries can cause that plugs in other countries cannot be inserted into the jacks, and a switching device for testing the circuit plug is needed for testing the circuit of different plugs.

The prior art is inconvenient to adjust and switch the jack to a proper position according to the positions of the pins on plugs with different specifications, so that circuit tests are inconvenient to be carried out on different plugs, the plugs are also inconvenient to be fastened after the pins on the plugs are inserted into the jacks, and the plugs are easy to loosen when the circuit tests are carried out on the plugs, therefore, the switching device for the circuit tests is provided.

Disclosure of Invention

The utility model aims to overcome the existing defects, and provides the switching device for circuit test, which can conveniently adjust and switch the jack to a proper position according to the positions of the pins on plugs with different specifications, so that the switching device is convenient to use when different plugs are subjected to circuit test, can conveniently fasten the plug after the pins on the plug are inserted into the jack, can avoid loosening of the plug when the plugs are subjected to circuit test, and can effectively solve the problems in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a switching device for circuit test comprises a bottom plate, a jack adjusting and switching unit and a plug compressing unit;

a bottom plate: is rectangular;

jack adjustment switching unit: the screw rod comprises a screw rod I, a rectangular support plate I, a limiting block, a slide column I, a motor support plate, a motor, a rectangular support plate II, a slide column II, a slide block, a movable support plate, a screw rod II, a bearing I, a rotating shaft I, a movable jack, a contact guide torch, a fixed block, a fixed jack, a ground guide torch and a bearing II, wherein the upper surface of one end of the bottom plate is fixedly connected with the lower end of the rectangular support plate I, the side surfaces of the two ends of the rectangular support plate I are respectively and slidably connected with the middle side surfaces of the two corresponding matched slide columns I, one end side surfaces of the two slide columns I are respectively and fixedly connected with the center positions of the side surfaces of the two limiting blocks, the other end side surfaces of the two slide columns I are respectively and fixedly connected with the two ends of one end side surfaces of the movable support plate I, the upper surface of the movable support plate is respectively and fixedly connected with the lower ends of the two corresponding matched rectangular support plates II, the two ends of the side surfaces of the two rectangular support plates II are respectively and fixedly connected with the two ends of the two corresponding matched slide column II, the two side surfaces of the two slide column II are respectively and slidably connected with the two corresponding slide column II, the two side surfaces of the two slide column II are respectively and fixedly connected with the two screw rod II, the two screw rod II are respectively and fixedly connected with the two screw rod II, the upper ends of the first rotating shafts are fixedly connected with the middle parts of the lower surfaces of the two corresponding matched movable jacks, the inner side surfaces of the two movable jacks are fixedly connected with the outer side surfaces of the two contact conductive lamps respectively, the middle parts of the upper surfaces of the other ends of the bottom plates are fixedly connected with the lower ends of the fixed blocks, the upper ends of the fixed blocks are fixedly connected with the lower surfaces of the fixed jacks, the inner side surfaces of the fixed jacks are fixedly connected with the outer side surfaces of the grounding conductive lamps, the middle parts of the side surfaces of the first rectangular supporting plates are in threaded connection with the middle side surfaces of the first screw rods, one end side surfaces of the first screw rods are in rotary connection with the middle parts of one end side surfaces of the movable supporting plates through the second bearings, the grounding conductive lamps are connected with grounding wires in an external circuit, the two contact conductive lamps are connected with zero wires and fire wires in the external circuit respectively, and the input ends of the motor are electrically connected with the output ends of an external control switch group;

plug compresses tightly unit: is arranged in the middle of the side surface of the other end of the bottom plate.

The bottom plate plays the fixed effect of support, when needing to carry out the circuit test to different plugs, make screw rod one rotate round bearing two, screw rod one remove and drive bearing two and remove, bearing two drive movable support board removes, movable support board drives the traveller one and slides along rectangle backup pad one, movable support board drives rectangle backup pad two and removes, rectangle backup pad two drives the traveller two and remove, the traveller two drives the sliding block and remove, the sliding block drives bearing one and removes, bearing one drives the pivot one and removes, pivot one drives movable jack and removes, movable jack drives the contact conductive cylinder and removes, thereby make the contact conductive cylinder remove suitable position, open the external control switch group of control motor, the motor work, the output shaft of motor drives screw rod two and rotates, screw rod two drive two sliding blocks and remove along the traveller two, the sliding block drives bearing one and removes, pivot one drives movable jack and removes, thereby make the distance between two movable jacks be adjusted to suitable distance, make pivot one rotate round bearing one, a movable jack drives the conductive cylinder and removes, thereby make the contact conductive cylinder rotate to wait to remove to take a position with the movable plug, the contact conductive cylinder and remove to test, when the plug is used for holding down the test with the plug, the plug is connected to the test unit, can be used for holding down the plug in order to insert the test with the plug in the test to the test, can be fixed in order to prevent to make contact plug, and plug wire two is convenient to insert the test, and contact plug is connected with the test plug.

Further, the jack adjusting and switching unit further comprises a rotary table, and the side surface of the other end of the first screw is fixedly connected with the center of the side surface of the rotary table. The rotating turntable drives the first screw rod to rotate, and the rotating radius of the first screw rod is increased by the turntable, so that the first screw rod can be rotated more easily and more easily.

Further, the jack adjusting and switching unit further comprises anti-skid grooves, and five anti-skid grooves are uniformly formed in the side face of the periphery of the rotary disc at equal angles. The anti-slip groove can prevent the hand from slipping when rotating the turntable.

Further, the plug compresses tightly the unit and contains rectangle backup pad three, traveller three, connecting plate, spring, pressure strip, pivot two, bearing three, rectangle backup pad four and slide plate, the other end side middle part and the one end side fixed connection of rectangle backup pad three of bottom plate, the other end upper surface both ends of rectangle backup pad three respectively with two corresponding complex traveller three's lower extreme fixed connection, two traveller three's upper ends respectively with the lower surface both ends fixed connection of connecting plate, two traveller three's side middle part respectively with slide plate's upper surface both ends sliding connection, the one end side middle part and the one end side fixed connection of rectangle backup pad four of slide plate, the other end upper surface of rectangle backup pad four is through bearing three and pivot two's lower extreme side pivoted connection, the upper end of pivot two and the one end lower surface fixed connection of pressure strip, the part that two traveller three are located between connecting plate and the slide plate has movably sleeved the spring respectively. The sliding plate vertically slides upwards along the sliding column three-way, the sliding plate compresses the spring, the sliding plate drives the rectangular supporting plate to move upwards, the rectangular supporting plate drives the bearing to move upwards, the bearing III drives the rotating shaft II to move upwards, the rotating shaft II drives the pressing plate to move upwards, the pressing plate stops moving after moving to a proper position, the rotating shaft II is driven to rotate around the bearing III, the pressing plate is driven to rotate to the upper position of the plug, the sliding plate is loosened, the sliding plate moves downwards under the acting force of the spring, the sliding plate drives the rectangular supporting plate to move downwards, the rectangular supporting plate drives the bearing to move downwards, the bearing III drives the rotating shaft II to move downwards, the rotating shaft II drives the pressing plate to move downwards, the pressing plate compresses the plug, and the rectangular supporting plate is used for supporting the sliding column III in a three-way mode, and the connecting plate can prevent the spring from falling.

Further, the plug compressing unit further comprises a supporting rod and a holding ball, the middle part of the side surface of the other end of the sliding plate is fixedly connected with the side surface of one end of the supporting rod, and the side surface of the other end of the supporting rod is fixedly connected with the middle part of the side surface of the holding ball. The holding ball is held to move upwards, the holding ball drives the support rod to move upwards, the support rod drives the sliding plate to move upwards, and the support rod and the holding ball enable the sliding plate to move more conveniently.

Further, the plug compressing unit further comprises a soft base plate, and the lower surface of the other end of the compressing plate is fixedly connected with the upper surface of the soft base plate. The soft backing plate can reduce the damage of the compacting plate to the plug.

Compared with the prior art, the utility model has the beneficial effects that: the switching device for circuit test has the following advantages:

1. the jack adjusting and switching unit arranged by the switching device for circuit testing enables the positions of the grounding conductive torch and the contact conductive torch to be conveniently adjusted and switched according to the positions of pins on different plugs, so that the switching device is convenient to use when circuit testing is conducted on the plugs.

2. The plug compressing unit arranged by the switching device for circuit testing can compress and fix the inserted plug, so that the plug is prevented from loosening when the circuit testing is performed, and the supporting rod and the holding ball can move the sliding plate more conveniently.

3. The switching device for circuit testing can conveniently adjust and switch the jack to a proper position according to the positions of the pins on plugs with different specifications, so that the switching device is convenient to use when circuit testing is carried out on different plugs, and can conveniently fasten the plugs after the pins on the plugs are inserted into the jacks, thereby avoiding looseness of the plugs when circuit testing is carried out on the plugs.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model.

FIG. 2 is a schematic view of the lower end structure of the present utility model.

FIG. 3 is a schematic view of the upper end structure of the present utility model.

In the figure: 1 bottom plate, 2 jack adjustment switching unit, 21 carousel, 22 antiskid groove, 23 screw rod one, 24 rectangle backup pad one, 25 stopper, 26 strut one, 27 motor backup pad, 28 motor, 29 rectangle backup pad two, 210 strut two, 211 sliding block, 212 movable backup pad, 213 screw rod two, 214 bearing one, 215 pivot one, 216 movable jack, 217 contact conductive torch, 218 fixed block, 219 fixed jack, 220 ground conductive torch, 221 bearing two, 3 plug compressing unit, 31 rectangle backup pad three, 32 strut three, 33 connecting plate, 34 spring, 35 compressing plate, 36 pivot two, 37 bearing three, 38 rectangle backup pad four, 39 sliding plate, 310 bracing piece, 311 holding ball, 312 soft backing plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, the present embodiment provides a technical solution: a switching device for circuit test comprises a bottom plate 1, a jack adjusting and switching unit 2 and a plug compressing unit 3;

the base plate 1: is rectangular;

jack adjustment switching unit 2: the screw rod comprises a screw rod I23, a rectangular support plate I24, a limiting block 25, a slide column I26, a motor support plate 27, a motor 28, a rectangular support plate II 29, a slide column II 210, a sliding block 211, a movable support plate 212, a screw rod II 213, a bearing I214, a rotating shaft I215, a movable jack 216, a contact conductive torch 217, a fixed block 218, a fixed jack 219, a grounded conductive cylinder 220 and a bearing II 221, wherein one end upper surface of the bottom plate 1 is fixedly connected with the lower end of the rectangular support plate I24, two end side surfaces of the rectangular support plate I24 are respectively and fixedly connected with the middle side surfaces of two corresponding matched slide columns I26, one end side surfaces of the two slide column I26 are respectively and fixedly connected with the center positions of the side surfaces of the two limiting blocks 25, the other end side surfaces of the two slide column I26 are respectively and fixedly connected with the two ends of one end side surfaces of the movable support plate 212, the upper surface of the movable support plate 212 is respectively and fixedly connected with the lower ends of the two corresponding matched rectangular support plates II 29, the two side surfaces of the two rectangular support plate II 29 are respectively and fixedly connected with the two end sides of the two corresponding matched slide column II 210, the two end sides of the two rectangular support plate II 210 are respectively and the two end sides of the two end surfaces of the two rectangular support plate 213 are respectively and fixedly connected with the two end sides of the screw rod 213, the two end sides of the screw rod 213 are respectively and fixedly connected with the middle side surfaces of the two end sides of the two corresponding slide blocks 213 respectively and the screw rod 213 are respectively and fixedly connected with the middle side surfaces of the two end sides of the two corresponding screw rod support plates 213 respectively, the middle parts of the upper surfaces of the two sliding blocks 211 are respectively and rotatably connected with the side surfaces of the lower ends of the first rotating shafts 215 through the first bearings 214, the upper ends of the first rotating shafts 215 are respectively and fixedly connected with the middle parts of the lower surfaces of the two corresponding matched movable jacks 216, the inner side surfaces of the two movable jacks 216 are respectively and fixedly connected with the outer side surfaces of the two contact electric guide torches 217, the middle parts of the upper surfaces of the other ends of the bottom plates 1 are fixedly connected with the lower ends of the fixed blocks 218, the upper ends of the fixed blocks 218 are fixedly connected with the lower surfaces of the fixed jacks 219, the inner side surfaces of the fixed jacks 219 are fixedly connected with the outer side surfaces of the grounding electric guide rolls 220, the side surfaces of the first rectangular supporting plates 24 are in threaded connection with the middle side surfaces of the first screws 23, one end side surfaces of the first screws 23 are respectively and rotatably connected with the middle parts of one end side surfaces of the movable supporting plates 212 through the second bearings 221, the grounding electric guide torches 220 are respectively connected with the zero lines and the live lines in the outer circuits, and the input ends of the motor 28 are electrically connected with the output ends of an outer control switch group;

the jack adjusting and switching unit 2 further comprises a rotary table 21, and the side surface of the other end of the first screw 23 is fixedly connected with the center of the side surface of the rotary table 21. The rotating disc 21 drives the first screw rod 23 to rotate, and the rotating radius of the first screw rod 23 is increased by the rotating disc 21, so that the rotation is easier and more labor-saving.

The jack adjusting and switching unit 2 further comprises anti-skid grooves 22, and five anti-skid grooves 22 are uniformly formed in the circumferential side surface of the turntable 21 at equal angles. The anti-slip groove 22 prevents the hand from slipping when the turntable 21 is rotated.

Plug compressing unit 3: is arranged in the middle of the side surface of the other end of the bottom plate 1.

The plug compressing unit 3 comprises a rectangular supporting plate III 31, sliding columns III 32, a connecting plate 33, springs 34, a compressing plate 35, a rotating shaft II 36, a bearing III 37, a rectangular supporting plate IV 38 and a sliding plate 39, the middle part of the other end side surface of the bottom plate 1 is fixedly connected with one end side surface of the rectangular supporting plate III 31, the two ends of the upper surface of the other end of the rectangular supporting plate III 31 are respectively fixedly connected with the lower ends of the two corresponding matched sliding columns III 32, the upper ends of the two sliding columns III 32 are respectively fixedly connected with the two ends of the lower surface of the connecting plate 33, the middle parts of the side surfaces of the two sliding columns III 32 are respectively and slidably connected with the two ends of the upper surface of the sliding plate 39, the middle part of one end side surface of the sliding plate 39 is fixedly connected with one end side surface of the rectangular supporting plate IV 38, the other end surface of the rectangular supporting plate IV 38 is rotatably connected with the lower end side surface of the rotating shaft II 36 through the bearing III 37, the upper end of the rotating shaft II 36 is fixedly connected with the lower end surface of the compressing plate 35, and the parts of the two sliding columns III 32 between the connecting plate 33 and the sliding plate 39 are respectively movably sleeved with the springs 34. The sliding plate 39 vertically slides upwards along the sliding column III 32, the sliding plate 39 compresses the spring 34, the sliding plate 39 drives the rectangular supporting plate IV 38 to move upwards, the rectangular supporting plate IV 38 drives the bearing III 37 to move upwards, the bearing III 37 drives the rotating shaft II 36 to move upwards, the rotating shaft II 36 drives the pressing plate 35 to move upwards, after moving to a proper position, the pressing plate 35 is rotated, the rotating shaft II 36 is driven to rotate around the bearing III 37, the pressing plate 35 is rotated to the upper position of the plug, the sliding plate 39 is loosened, the sliding plate 39 moves downwards under the acting force of the spring 34, the sliding plate 39 drives the rectangular supporting plate IV 38 to move downwards, the rectangular supporting plate IV 38 drives the bearing III 37 to move downwards, the bearing III 37 drives the rotating shaft II 36 to move downwards, the rotating shaft II 36 drives the pressing plate 35 to move downwards, the pressing plate 35 is pressed by the plug, and the rectangular supporting plate III 31 is used for supporting the sliding column III 32, and the connecting plate 33 can prevent the spring 34 from falling.

The plug compressing unit 3 further comprises a supporting rod 310 and a holding ball 311, wherein the middle part of the side surface of the other end of the sliding plate 39 is fixedly connected with the side surface of one end of the supporting rod 310, and the side surface of the other end of the supporting rod 310 is fixedly connected with the middle part of the side surface of the holding ball 311. The holding ball 311 is held to move upward, the holding ball 311 drives the support rod 310 to move upward, the support rod 310 drives the sliding plate 39 to move upward, and the support rod 310 and the holding ball 311 enable the sliding plate 39 to move more conveniently.

The plug compressing unit 3 further comprises a soft pad 312, and the lower surface of the other end of the compressing plate 35 is fixedly connected with the upper surface of the soft pad 312. The soft pad 312 may reduce damage to the plug from the compression plate 35.

The bottom plate 1 plays a role in supporting and fixing, when different plugs are required to be tested, the screw rod I23 rotates around the bearing II 221, the screw rod I23 moves to drive the bearing II 221 to move, the bearing II 221 drives the movable supporting plate 212 to move, the movable supporting plate 212 drives the sliding column I26 to slide along the rectangular supporting plate I24, the movable supporting plate 212 drives the rectangular supporting plate II 29 to move, the rectangular supporting plate II 29 drives the sliding column II 210 to move, the sliding column II 210 drives the sliding block 211 to move, the sliding block 211 drives the bearing I214 to move, the bearing I214 drives the rotating shaft I215 to move, the rotating shaft I215 drives the movable jack 216 to move, the movable jack 216 drives the contact conductive torch 217 to move, so that the contact conductive torch 217 moves to a proper position, an external control switch group of the control motor 28 is opened, the motor 28 works, an output shaft of the motor 28 drives the screw rod II 213 to rotate, the screw rod II 213 drives the two sliding blocks 211 to slide along the slide column II 210, the sliding blocks 211 drive the bearing I214 to move, the bearing I214 drives the rotating shaft I215 to move, the rotating shaft I215 drives the movable jack 216 to move, thereby the distance between the two movable jacks 216 is adjusted to a proper distance, the rotating shaft I215 rotates around the bearing I214, the rotating shaft I215 drives the movable jack 216 to rotate, the movable jack 216 drives the contact conductive torch 217 to rotate, thereby the contact conductive torch 217 rotates to a position suitable for a plug to be tested, pins on the plug to be tested are inserted into the grounding conductive torch 220 and the two contact conductive torches 217, thereby the plug is communicated with a circuit, the limiting block 25 can prevent the slide column I26 from falling off when the plug is conveniently used for circuit testing, the motor support plate 27 is used for supporting the motor 28, the rectangular support plate II 29 is used for supporting the slide column II 210, the plug compressing unit 3 makes it possible to compress and fix the inserted plug, thereby avoiding loosening of the plug when performing the circuit test.

The working principle of the switching device for circuit test provided by the utility model is as follows:

when different plugs are required to be tested, the rotating turntable 21 drives the first screw rod 23 to rotate, so that the first screw rod 23 rotates around the second bearing 221, the first screw rod 23 moves to drive the second bearing 221 to move, the second bearing 221 drives the movable supporting plate 212 to move, the movable supporting plate 212 drives the first slide column 26 to slide along the first rectangular supporting plate 24, the movable supporting plate 212 drives the second rectangular supporting plate 29 to move, the second rectangular supporting plate 29 drives the second slide column 210 to move, the second slide column 210 drives the sliding block 211 to move, the first sliding block 211 drives the first bearing 214 to move, the first bearing 214 drives the first rotating shaft 215 to move, the first rotating shaft 215 drives the movable jack 216 to move, the movable jack 216 drives the contact conductive torch 217 to move, so that the contact conductive torch 217 moves to a proper position, an external control switch group of the control motor 28 is opened, the motor 28 works, an output shaft of the motor 28 drives the second screw rod 213 to rotate, the screw rod II 213 drives the two sliding blocks 211 to slide along the slide column II 210, the sliding blocks 211 drive the bearing I214 to move, the bearing I214 drives the rotating shaft I215 to move, the rotating shaft I215 drives the movable jack 216 to move, thereby the distance between the two movable jacks 216 is adjusted to a proper distance, the rotating shaft I215 rotates around the bearing I214, the rotating shaft I215 drives the movable jack 216 to rotate, the movable jack 216 drives the contact conductive torch 217 to rotate, thereby the contact conductive torch 217 rotates to a position suitable for a plug to be tested, pins on the plug to be tested are inserted into the grounding conductive torch 220 and the two contact conductive torches 217, thereby the plug is communicated with a circuit, so that the plug is convenient to use in circuit test, the holding ball 311 moves upwards, the holding ball 311 drives the support rod 310 to move upwards, the support rod 310 drives the sliding plate 39 to move upwards, the sliding plate 39 vertically slides upwards along the sliding column III 32, the sliding plate 39 compresses the spring 34, the sliding plate 39 drives the rectangular supporting plate IV 38 to move upwards, the rectangular supporting plate IV 38 drives the bearing III 37 to move upwards, the bearing III 37 drives the rotating shaft II 36 to move upwards, the rotating shaft II 36 drives the pressing plate 35 to move upwards, after moving to a proper position, the pressing plate 35 is rotated, the rotating shaft II 36 is driven to rotate around the bearing III 37, the pressing plate 35 is rotated to the upper position of the plug, the holding ball 311 is loosened, the sliding plate 39 moves downwards under the acting force of the spring 34, the sliding plate 39 drives the rectangular supporting plate IV 38 to move downwards, the rectangular supporting plate IV 38 drives the bearing III 37 to move downwards, the bearing III 37 drives the rotating shaft II 36 to move downwards, and the rotating shaft II 36 drives the pressing plate 35 to move downwards, so that the pressing plate 35 presses the plug.

It should be noted that, in the above embodiment, the core chip of the external control switch set is selected from a PLC single chip, and the motor 28 can be freely configured according to the actual application scenario, and it is recommended that the motor 28 is a stepper motor. The external control switch set controls operation of the motor 28 using methods commonly used in the art.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims (6)

1. The utility model provides a switching device for circuit test which characterized in that: comprises a bottom plate (1), a jack adjusting and switching unit (2) and a plug compressing unit (3);

bottom plate (1): is rectangular;

jack adjustment switching unit (2): the device comprises a screw rod I (23), a rectangular supporting plate I (24), a limiting block (25), a slide column I (26), a motor supporting plate (27), a motor (28), a rectangular supporting plate II (29), a slide column II (210), a sliding block (211), a movable supporting plate (212), a screw rod II (213), a bearing I (214), a rotating shaft I (215), a movable jack (216), a contact conductive tube (217), a fixed block (218), a fixed jack (219), a grounding conductive tube (220) and a bearing II (221), wherein one end upper surface of the bottom plate (1) is fixedly connected with the lower end of the rectangular supporting plate I (24), two end side surfaces of the rectangular supporting plate I (24) are respectively and slidably connected with the middle side surfaces of the two corresponding matched slide columns I (26), one end side surfaces of the two slide columns I (26) are respectively and fixedly connected with two ends of the side surfaces of the two limiting blocks (25), the other end side surfaces of the two slide columns I (26) are respectively and fixedly connected with two ends of one end side surfaces of the movable supporting plate (212), two upper surface ends of the movable supporting plate (212) are respectively and fixedly connected with two corresponding lower ends of the two corresponding matched rectangular supporting plates II (29 respectively, the two end side surfaces of the two sliding columns II (210) are respectively connected with two corresponding matched sliding blocks (211) in a sliding way, the middle part of the side surface of the two rectangular supporting plates II (29) is respectively connected with the two end side surfaces of the screw rod II (213) in a rotating way, the two end side surfaces of the screw rod II (213) are respectively connected with the middle part of the side surfaces of the two sliding blocks (211) in a threaded way, the middle part of the side surface of one rectangular supporting plate II (29) is fixedly connected with one end side surface of the motor supporting plate (27), the side surface of the motor supporting plate (27) is fixedly connected with the side surface of the motor (28), the output shaft of the motor (28) is fixedly connected with one end side surface of the screw rod II (213), the upper surface middle parts of the two sliding blocks (211) are respectively connected with the lower end side surfaces of the two rotating shafts II (215) in a rotating way through two first bearings (214), the upper ends of the two rotating shafts II (215) are respectively connected with the lower surface middle parts of two corresponding matched movable inserting holes (216), the inner side surfaces of the two movable inserting holes (216) are respectively connected with the upper end surfaces of the two movable inserting holes (218) of the two movable inserting holes (217) are respectively connected with the upper end surfaces of the two electric torch blocks (218) fixedly connected with the lower end surfaces of the upper end surfaces of the lower electric torch (218) fixedly connected with the lower end surfaces of the upper end surfaces of the electric lamp, the inner side surface of the fixed jack (219) is fixedly connected with the outer side surface of the grounding conductive barrel (220), the middle side surface of the rectangular support plate I (24) is in threaded connection with the middle side surface of the screw rod I (23), one end side surface of the screw rod I (23) is rotationally connected with the middle side surface of one end of the movable support plate (212) through a bearing II (221), the grounding conductive barrel (220) is connected with a grounding wire in an external circuit, two contact conductive barrels (217) are respectively connected with a zero wire and a fire wire in the external circuit, and the input end of the motor (28) is electrically connected with the output end of the external control switch group;

plug compressing unit (3): is arranged in the middle of the side surface of the other end of the bottom plate (1).

2. The switching device for circuit testing according to claim 1, wherein: the jack adjusting and switching unit (2) further comprises a rotary table (21), and the side surface of the other end of the first screw rod (23) is fixedly connected with the center of the side surface of the rotary table (21).

3. The switching device for circuit testing according to claim 2, wherein: the jack adjusting and switching unit (2) further comprises anti-skid grooves (22), and five anti-skid grooves (22) are uniformly formed in the circumferential side surface of the rotary disc (21) at equal angles.

4. The switching device for circuit testing according to claim 1, wherein: the plug compressing unit (3) comprises a rectangular supporting plate III (31), a sliding column III (32), a connecting plate (33), springs (34), a compressing plate (35), a rotating shaft II (36), a bearing III (37), a rectangular supporting plate IV (38) and a sliding plate (39), the middle part of the side surface of the other end of the bottom plate (1) is fixedly connected with the side surface of one end of the rectangular supporting plate III (31), the two ends of the upper surface of the other end of the rectangular supporting plate III (31) are respectively fixedly connected with the lower ends of the sliding columns III (32) which are correspondingly matched, the upper ends of the sliding columns III (32) are respectively fixedly connected with the two ends of the lower surface of the connecting plate (33), the middle part of the side surface of the two sliding columns III (32) is respectively connected with the two ends of the upper surface of the sliding plate (39), the middle part of the side surface of one end of the sliding plate IV (38) is fixedly connected with the side surface of one end of the rectangular supporting plate IV (38), the upper surface of the other end of the rectangular supporting plate IV (38) is rotatably connected with the lower end of the rotating shaft II (36) through the bearing III (37), and the upper end of the rotating plate II (36) is fixedly connected with the two ends of the compressing plate (35) respectively, and the two ends of the sliding columns III (33) are respectively movably connected with the sliding plate III.

5. The switching device for circuit testing according to claim 4, wherein: the plug compressing unit (3) further comprises a supporting rod (310) and a holding ball (311), the middle part of the side surface of the other end of the sliding plate (39) is fixedly connected with the side surface of one end of the supporting rod (310), and the side surface of the other end of the supporting rod (310) is fixedly connected with the middle part of the side surface of the holding ball (311).

6. The switching device for circuit testing according to claim 5, wherein: the plug compressing unit (3) further comprises a soft base plate (312), and the lower surface of the other end of the compressing plate (35) is fixedly connected with the upper surface of the soft base plate (312).

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