CN210742476U - Electrical system fault diagnosis instrument - Google Patents

Abstract

The utility model relates to an electrical system fault diagnosis instrument, which comprises a universal meter and a detection line provided with a probe pen, wherein the other end of the detection line is connected with a connector, the universal meter is connected with a shell in a sliding way, a channel is communicated with the shell, and the universal meter is positioned in the channel; the shell is provided with a through groove opposite to the connecting port, the through groove is communicated with the channel, and the shell is provided with a containing device; the shell is provided with a storage box, a screwdriver is placed in the storage box, and the storage box is provided with a sealing plate; the multimeter is provided with a clamp; the multimeter is provided with a display unit. By adopting the technical scheme, the universal meter can be conveniently accommodated in the shell by the shell, the detection line and the probe pen can be conveniently accommodated by the accommodating device, and the screwdriver is placed in the accommodating box, so that the screwdriver is prevented from falling out; the clamp is arranged on the side surface of the multimeter, so that the clamp is convenient to carry; the clamp, the screwdriver, the probe pen, the universal meter and the shell are integrated, so that the clamp is convenient to store and carry integrally.

Description

Electrical system fault diagnosis instrument

Technical Field

The utility model belongs to the technical field of the electrical system detection technique and specifically relates to an electrical system fault diagnosis appearance is related to.

Background

Electrical equipment is widely used in production, and electrical failures are inevitable. The electrical system automation technology is an automated management of an electrical system, and includes monitoring of electrical equipment, checking of system faults, protection of the electrical system, and the like.

In actual work, different electrical faults are encountered, the generation of the electrical faults is strange, and the fault removing method and the fault removing mode can only be determined according to the specific situation of the faults. According to the structural characteristics of electrical devices, from the viewpoint of finding electrical faults, common electrical faults can be classified into three categories: power failures, circuit failures, and equipment and component failures.

Among them, the circuit failure is often: disconnection, short circuit, grounding, wiring error and the like, so that the universal meter is frequently required to be checked and detected. Meanwhile, for power failure and equipment and element failure, detection lines for detection, display lamps, screwdrivers and clamps are generally required to be matched with a multimeter for troubleshooting and detection. Therefore, more objects need to be carried by the fault diagnosis of the electrical system, the carrying is inconvenient, the conditions such as omission are easy to generate, and meanwhile, the detection wire is wound into a group and is inconvenient to take out. Therefore, there is room for improvement.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide an electric system fault diagnosis appearance has the advantage of being convenient for accomodate and carry.

In order to achieve the above purpose, the utility model provides a following technical scheme:

an electrical system fault diagnosis instrument comprises a universal meter and a detection line provided with a probe pen, wherein one end, far away from the probe pen, of the detection line is connected with a connector spliced with a connector of the universal meter, the universal meter is connected with a shell in a sliding mode, a channel for the universal meter to penetrate through is arranged on the side face of the shell, and the universal meter is located in the channel; a through groove is formed in the end face, close to the front face of the multimeter, of the shell, the through groove is communicated with the channel, the through groove is arranged opposite to a connecting port of the multimeter, and a plurality of accommodating devices for accommodating the probe pen and the detection line are mounted on the side face of the shell; a storage box is arranged on the side face of the shell, a screwdriver is placed in the storage box, and a sealing plate for sealing the storage box is arranged at an opening of the storage box; a clamp for clamping the wire is arranged on the side surface of the multimeter; and a display unit for judging the circuit fault condition is arranged on the end face of the multimeter.

By adopting the technical scheme, the cross section of the channel is larger than that of the multimeter, so that the multimeter can be conveniently inserted into the channel of the shell, the multimeter can be accommodated in the channel of the shell, the through groove is arranged opposite to the connector of the multimeter, so that the connector can be conveniently inserted into the connector of the multimeter, the detection line can be fixed, meanwhile, a probe pen of the detection line far away from the connector can be accommodated in the accommodating device, the detection line can be conveniently accommodated in the accommodating device, the condition that the detection line is wound into a group by irregular ground wires can be reduced, the detection line can be conveniently taken out and used, and the effect of saving the use space can be further achieved; meanwhile, the screwdriver is accommodated in the accommodating box, and the opening of the accommodating box is sealed by the sealing plate so as to reduce the situation that the screwdriver falls out; the clamp is arranged on the side face of the multimeter, so that the clamp and the multimeter form an integrated structure, the clamp is convenient to carry, and meanwhile, the clamp is convenient to clamp the plastic rubber of the wire skin. Therefore, the universal meter is conveniently accommodated in the shell by arranging the shell, the detection line and the probe pen are accommodated in the accommodating device, the detection line and the probe pen are conveniently accommodated, and the screwdriver is placed in the accommodating box to reduce the situation that the screwdriver falls out; the clamp is arranged on the side surface of the multimeter, so that the clamp is convenient to carry; the clamp, the screwdriver, the probe pen, the universal meter and the shell form an integrated structure, so that the clamp is convenient to store and carry integrally.

The utility model discloses further set up to: the accommodating device comprises an accommodating barrel hinged to the shell, a torsional spring is inserted into an articulated shaft between the accommodating barrel and the shell, one end of the torsional spring is fixedly connected with the shell, the other end of the torsional spring is fixedly connected with the accommodating barrel, a pen container is placed in an inner cavity of the accommodating barrel, the pen container is rotatably connected with the bottom end of the inner cavity of the accommodating barrel, the pen container winds the axis of the pen container to rotate, probe pens are inserted into the pen container, the inner cavity of the pen container is opposite to the probe pens to be circumferentially limited, and one end of the bottom end of the inner cavity of the accommodating barrel, which is far away from the pen container, is provided with a rope winding piece for winding the detection line.

By adopting the technical scheme, the hinge shaft between the containing barrel and the shell is sleeved with the torsion spring, and the containing barrel is attached to the upper surface of the shell in a natural state by utilizing the reset action of the torsion spring, so that the moving space of the containing barrel is saved, and meanwhile, the whole volume formed by the containing barrel and the shell is small, so that the carrying is convenient; a section of thick bamboo is held in the upset for the opening of pen container sets up, and convenient to use person inserts the probe pen in the pen container, in order to accomodate the probe pen, simultaneously, at the coaxial receipts rope spare that sets up of the open end of pen container, so that the rolling detection line, thereby reduce the detection line and be difficult to take out the condition of probe pen because of irregular winding.

The utility model discloses further set up to: the rope collecting piece is a reel, the reel and the pen container rotate coaxially, a circular groove for the probe pen to penetrate through penetrates through the end face of the reel, and the detection line is wound on the outer peripheral face of the reel; the outer peripheral surface of the probe pen protrudes outwards to form a limiting block, the inner peripheral surface of the pen container is provided with a limiting groove, the length direction of the limiting groove is consistent with the axial direction of the pen container, the limiting block is clamped with the limiting groove to slide, and the limiting groove is used for limiting the limiting block in the circumferential direction; the pen container and the accommodating barrel are fixedly inserted through a plug pin.

By adopting the technical scheme, the probe pen can penetrate through the circular groove to be inserted into the pen container so as to receive the probe pen, the reel and the pen container are coaxially and rotatably arranged, and meanwhile, the limiting block is clamped and limited with the limiting groove; meanwhile, the pin holes are communicated on the outer peripheral surfaces of the accommodating barrel and the pen barrel, and when the pin holes of the pen barrel are aligned with the pin holes of the accommodating barrel, the pin holes on the outer peripheral surfaces of the accommodating barrel and the pen barrel are communicated through the pins to fix the pen barrel, so that the situation that the detection line is separated from the reel due to the rotation of the reel is reduced.

The utility model discloses further set up to: one side of the peripheral surface of the reel, which is far away from the pen container, is provided with a notch for the detection line to pass through, and the notch is communicated with the circular groove.

Through adopting above-mentioned technical scheme, the probe pen makes reel and probe pen rotate simultaneously through rotating the pen container under the prerequisite of inserting the pen container, and through setting up the breach, the size of breach can supply the detection line to pass, restricts the detection line simultaneously when reel and probe pen rotate, and the condition of skew appears for the convenient operation of detection line rolling in the reel.

The utility model discloses further set up to: and the inner side wall opposite to the through groove is provided with a movable opening, and the movable opening faces to the connecting port of the multimeter.

Through adopting above-mentioned technical scheme, set up the expansion mouth at the relative inside wall that leads to the groove for during the use, be convenient for pass the expansion mouth and extract the connector, make the extraction of the connector of detection line easy and simple to handle.

The utility model discloses further set up to: the outer peripheral surface of the pen container is provided with anti-skid grains.

Through adopting above-mentioned technical scheme, the frictional force of pen container outer peripheral face is favorable to strengthening to the antiskid line, and then makes the easy and simple to handle of rotating pen container outer peripheral face.

The utility model discloses further set up to: the groove orientation the inside wall arch of multimeter has the sand grip, the length direction of sand grip with the slip direction of casing is unanimous, the side of multimeter is opened there is the spout, the length direction of spout with the length direction of sand grip is unanimous, the sand grip with the spout joint slides, the spout is right the sand grip carries out circumference spacing.

Through adopting above-mentioned technical scheme, slide through setting up sand grip and spout joint to reduce the condition of casing and multimeter separation, be favorable to improving casing sliding motion's guidance quality simultaneously, and then make the sliding motion of casing more smooth and easy.

The utility model discloses further set up to: and a rubber pad for enhancing friction force is arranged in the groove of the sliding groove.

Through adopting above-mentioned technical scheme, set up the rubber pad in the spout, when sand grip and spout joint slip, be favorable to strengthening the sliding friction power of the tank bottom surface of sand grip and spout to make casing and multimeter reach the relatively fixed state, and then make the fixed easy and simple to handle of casing.

The utility model discloses further set up to: and a baffle for abutting against the multimeter is inwards protruded from the side surface of the shell along the length direction of the channel, and the baffle is positioned below the clamp.

Through adopting above-mentioned technical scheme, through setting up the baffle, when casing and multimeter sliding connection, the condition of baffle and multimeter butt in order to reduce multimeter from the passageway of casing roll-off, and then make the accomodate of multimeter easy and simple to handle, the baffle is located the below of clamp simultaneously for form the space that supplies to clamp to pass through between baffle and the passageway, produce the condition that the collision was interfered with the baffle in order to reduce clamp.

The utility model discloses further set up to: and a display unit for judging the circuit fault condition is arranged on the end face of the multimeter.

By adopting the technical scheme, the display unit is convenient for judging the fault condition of the detection circuit.

To sum up, the utility model discloses following beneficial effect has:

1. the probe pen is convenient to store in the pen container by arranging the storage device, and the detection line is wound by the winding wheel, so that the condition that the detection line is disordered is reduced, the effect of convenient storage and taking out is achieved, and the whole probe pen is convenient to carry;

2. the storage box is arranged to conveniently store the screwdriver, so that the situation that a user forgets to take the screwdriver is reduced, and the whole screwdriver is convenient to carry;

3. the clamp and the multimeter form an integrated structure by arranging the clamp, so that the clamp is convenient and fast to carry integrally;

4. the gap is arranged, so that the winding operation of the winding wheel is simple and convenient; through setting up the movable opening for the grafting of connector and universal meter's connector is easy and simple to handle.

Drawings

FIG. 1 is a schematic diagram of a multimeter of the present embodiment;

FIG. 2 is a schematic view of the overall structure of the present embodiment;

FIG. 3 is a sectional view of the present embodiment;

FIG. 4 is an enlarged view of a portion of FIG. 2 at A;

FIG. 5 is a partial enlarged view at B in FIG. 3;

FIG. 6 is an enlarged view of a portion of FIG. 3 at C;

fig. 7 is a circuit diagram of the display unit of the present embodiment.

Reference numerals: 1. a housing; 11. a channel; 12. a convex strip; 13. a through groove; 14. a movable opening; 15. a baffle plate; 16. a movable groove; 2. a multimeter; 21. a chute; 3. clamping; 4. detecting lines; 41. a stylus pen; 411. a limiting block; 42. a connector; 5. a storage device; 51. a receiving cylinder; 52. a pen container; 521. rotating the block; 522. a limiting groove; 523. anti-skid lines; 53. a rope retracting member; 531. a reel; 532. a notch; 533. a circular groove; 54. a pin hole; 55. a bolt; 6. a hinge; 61. a torsion spring; 7. a storage box; 71. a sealing plate; 8. a screwdriver; 9 a display unit; 91. a first test light; 92. a second test lamp; 93. an illuminating lamp.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1 to 2, an electrical system fault diagnosis instrument comprises a multimeter 2 and a housing 1, wherein a sliding groove 21 is formed in the side surface of the multimeter 2, a rubber pad (not shown in the figure) for enhancing friction is fixedly connected to the inner side wall of the sliding groove 21, the sliding groove 21 is communicated with two side surfaces of the multimeter 2 along the length direction of the multimeter, and a clamp 3 for clamping a plastic skin of a wire is arranged on the side surface of the multimeter 2 along the length direction and close to a display screen of the multimeter 2.

As shown in fig. 2 to 3, casing 1 is the cuboid, and there is passageway 11 casing 1's side through, and the length direction of 1 passageway 11 of casing is unanimous with the length direction of multimeter 2, and the cross section size of passageway 11 is greater than the cross section of multimeter 2 along length direction, and the protruding sand grip 12 that has of the inside wall of passageway 11, and the length direction of sand grip 12 is unanimous with the length direction of spout 21, and sand grip 12 slides with spout 21 joint, and spout 21 carries out circumference spacing to sand grip 12.

A baffle plate 15 protrudes from the side surface of the shell 1 close to the clamp 3, and a space for the clamp 3 to pass through is formed between the top surface of the baffle plate 15 and the inner top surface of the channel 11. The shell 1 and the multimeter 2 are clamped and slide, so that the multimeter 2 can be conveniently accommodated in the channel 11 of the shell 1, and meanwhile, the friction force between the convex strip 12 and the sliding groove 21 is enhanced by using a rubber gasket (shown in the figure), so that the situation that the multimeter 2 and the shell 1 are separated from each other is reduced; the side of the multimeter 2 adjacent the clamp 3 abuts the baffle 15 to reduce the multimeter 2 from slipping out of the channel 11.

As shown in fig. 2 to 3, the electrical system fault diagnosis instrument further includes a detection line 4, one end of the detection line 4 is connected with a probe pen 41, and the other end of the detection line 4, which is far away from the probe pen 41, is connected with a connector 42 inserted into a connector of the multimeter 2. Two storage devices 5 for storing the detection line 4 and the probe pen 41 are mounted on the upper end face of the housing 1, the two storage devices 5 are respectively arranged on two sides of the housing 1 along the width direction, each storage device 5 comprises a containing cylinder 51, each containing cylinder 51 is a cylinder with an annular-like cross section, an inner ring of the cross section of each containing cylinder 51 is circular, and an outer ring of the cross section of each containing cylinder 51 is square.

As shown in fig. 3 to 4, the accommodating cylinder 51 is hinged to the housing 1 through the hinge 6, the torsion spring 61 is inserted into the hinge shaft of the accommodating cylinder 51 and the housing 1, one end of the torsion spring 61 is fixedly connected to the housing 1, and the other end of the torsion spring 61 is fixedly connected to the accommodating cylinder 51, so that in a natural state, the lower end surface of the accommodating cylinder 51 is attached to the upper end surface of the housing 1, the length direction of the accommodating cylinder 51 is consistent with the length direction of the multimeter 2, and the opening of the accommodating cylinder 51 faces to the side away from the clamp 3.

As shown in fig. 3 and 5, the inner cavity of the accommodating tube 51 is rotatably connected with a pen container 52, the pen container 52 is a cylindrical body with a circular cross section, and the diameter of the outer peripheral surface of the pen container 52 is smaller than that of the inner cavity of the accommodating tube 51. The end surface of the pen container 52 far away from the opening end thereof is fixedly connected with a rotating block 521, and the pen container 52 is rotatably connected with the middle part of the bottom surface of the inner cavity of the accommodating container 51 through the rotating block 521. The open end of the pen barrel 52 protrudes out of the open end of the accommodating barrel 51, the part of the pen barrel 52 protruding out of the open end of the accommodating barrel 51 is provided with anti-slip lines 523 for enhancing friction force, the inner circumferential surface of the inner cavity of the pen barrel 52 is provided with two limiting grooves 522, the two limiting grooves 522 are respectively arranged at two sides of the axis of the pen barrel 52, the length direction of the limiting grooves 522 is consistent with the axis direction of the pen barrel 52, and the limiting grooves 522 are communicated with the open end of the pen barrel 52. The outer peripheral face of probe pen 41 is protruding to have two stopper 411, and two stopper 411 lists in the both sides of the axis of probe pen 41, and stopper 411 slides with spacing groove 522 joint, and spacing groove 522 carries out circumference spacing to stopper 411.

As shown in fig. 5 to 6, pin holes 54 are formed through the outer peripheral surface of the accommodating cylinder 51 and the outer peripheral surface of the barrel 52, and when the barrel 52 is rotated until the pin holes 54 of the barrel 52 are opposite to the pin holes 54 of the accommodating cylinder 51, the barrel 52 and the accommodating cylinder 51 are inserted and fixed by a bolt 55 to limit the rotation of the barrel 52. The rope winding piece 53 is installed at the opening end of the pen barrel 52, the rope winding piece 53 is a winding wheel 531, the winding wheel 531 is fixedly connected with the opening end of the pen barrel 52, the axis of the winding wheel 531 rotates coaxially with the pen barrel 52, the axis of the winding wheel 531 is arranged coaxially with the axis of the pen barrel 52, a circular groove 533 for the probe pen 41 to penetrate through penetrates through the end face of the winding wheel 531, and the axis of the circular groove 533 is arranged coaxially with the axis of the pen barrel 52. The peripheral surface of one end of the reel 531, which is far away from the pen container 52, is provided with a notch 532, the notch 532 is communicated with the circular groove 533, and the size of the notch 532 is larger than the size of the section of the detection line 4.

As shown in fig. 3 and 6, the upper end face of the casing 1 is provided with a through groove 13, the through groove 13 is arranged opposite to the connection port of the multimeter, the inner side wall opposite to the through groove 13 is provided with a movable port 14, the section of the movable port 14 is semicircular, and the movable port 14 is arranged towards the connection port of the multimeter 2. So that use will insert the connector 42 through the expansion opening 14 in the connector department of multimeter 2, simultaneously, slide through stopper 411 and spacing groove 522 joint, conveniently insert probe pen 41 in pen container 52, make probe pen 41 and pen container 52 coaxial rotation simultaneously, utilize anti-skidding line 523 to rotate the outer peripheral face of pen container 52, will be close to the detection line 4 and the breach 532 joint of probe pen 41 simultaneously, and then make the detection line 4 winding at the outer peripheral face of reel 531, with rolling detection line 4. When the pin holes 54 of the pen container 52 are opposite to the pin holes 54 of the accommodating cylinder 51, the pen container 52 and the accommodating cylinder 51 are inserted and fixed through the bolts 55 to fix the rotation of the reel 531, and then the probe pen 41, the detection line 4 and the connector 42 are accommodated in the accommodating device 5, so that the carrying is convenient.

As shown in fig. 2 to 3, a storage box 7 is integrally connected to a side surface of the housing 1 adjacent to the passage 11, and a longitudinal direction of the storage box 7 coincides with a longitudinal direction of the multimeter 2. A screwdriver 8 is placed in the storage case 7. The opening of receiver 7 sets up, closing plate 71 is installed to the opening of receiver 7, closing plate 71 passes through hinge 6 and is articulated with receiver 7, torsion spring 61 has been cup jointed with the articulated shaft of receiver 7 to closing plate 71, torsion spring 61's one end and receiver 7 fixed connection, torsion spring 61's the other end and closing plate 71 fixed connection, make under natural state, closing plate 71 seals the opening of receiver 7, and closing plate 71 is close to the direction upset of multimeter 2 around articulated axial. The upper end surface of the shell 1 near the containing box 7 is provided with a movable groove 16 (as shown in fig. 4) for the rotary motion of the sealing plate 71. The screwdriver 8 is stored in the storage box 7, so that the situation that a user forgets to take the screwdriver 8 is reduced, and the carrying is convenient.

As shown in fig. 1 and 7, a display unit 9 for determining a circuit failure condition is mounted on an upper end surface of the multimeter 2, the display unit 9 including: the battery pack comprises a first battery E1, a second battery E2 and a self-locking switch S2, wherein the negative electrode of the first battery E1 is connected with the positive electrode of the second battery E2, and the negative electrode of the first battery E1 is also connected with a first test lamp 91 through a normally open contact of the self-locking switch S2; the negative pole of the second battery E2 is connected with the second test lamp 92 through the normally closed contact of the self-locking switch S2; the other ends of the first test lamp 91 and the second test lamp 92 are connected and then led out through a lead and connected with the probe pen 41; the positive electrode of the first battery E1 is led out by another lead and then is connected with another probe pen 41; and the first battery E1 and the second battery E2 are connected in series and then are connected into a power supply circuit of an illuminating lamp 93.

The first battery E1 and the second battery E2 are both 12V storage batteries; the test voltage (12V or 24V) of the whole electrical appliance component can be selected through the normally open contact and the normally closed contact of the self-locking switch S2, and the testable whole electrical appliance component mainly comprises the following components: diodes, wires, fuses, relays, bulbs, etc. For example, when testing a diode, the positive wire of the probe pen 41 is connected to one end of the diode, the negative wire of the other probe pen 41 is connected to the other end of the diode, and if the test light is on, the positive wire is connected to the positive electrode of the diode, and the other end is the negative electrode of the diode. If the test lamp is not bright, the polarity and the quality of the diode can be further tested through the resistance grade of the measuring unit, the forward resistance test of the diode is generally 8-10 omega, and the reverse resistance test of the diode is generally infinite. If the resistance test at both ends of the diode is 0 or infinite, the diode is damaged.

The working conditions and principles of the embodiment are as follows:

when the multimeter 2, the screwdriver 8, the probe pen 41 and the detection line 4 need to be accommodated in the casing 1, firstly, the multimeter 2 is accommodated in the channel 11 of the casing 1, so that the raised line 12 is clamped with the sliding groove 21 to slide until the multimeter 2 is abutted against the baffle 15, and a rubber pad (shown in the figure) is utilized to enhance the friction force between the sliding groove 21 and the raised line 12, so that the multimeter 2 and the casing 1 keep a relatively fixed state.

Then, the connector 42 of the detection line 4 is inserted into the connecting port of the multimeter 2, then the accommodating barrel 51 is turned over to enable the opening of the accommodating barrel 51 to face in the oblique upward direction, the probe pen 41 is inserted into the pen barrel 52, the limiting block 411 and the limiting groove 522 are clamped and slide, then the detection line 4 close to the probe pen 41 is clamped in the notch 532, the anti-skidding grains 523 of the pen barrel 52 are shifted, the pen barrel 52, the probe pen 41 and the reel 531 rotate synchronously, the detection line 4 is wound on the outer peripheral surface of the reel 531, when the pin hole 54 of the pen barrel 52 is opposite to the pin hole 54 of the accommodating barrel 51, the pen barrel 52 is fixedly connected with the accommodating barrel 51 through the bolt 55 in an inserting mode, the rotation of the pen barrel 52 is limited, and the probe pen 41 and the detection.

Next, the sealing plate 71 is turned upside down, the driver 8 is placed in the housing case 7, and then the sealing plate 71 is closed so that the sealing plate 71 seals the opening of the housing case 7, thereby reducing the possibility that the driver 8 falls out. Therefore, the containing operation of the universal meter 2, the screwdriver 8, the probe pen 41 and the detection line 4 of the electrical system fault diagnosis instrument is completed, and the carrying is convenient.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (10)

1. An electric system fault diagnosis instrument is characterized in that: the detection line (4) is provided with a probe pen (41), one end, far away from the probe pen (41), of the detection line (4) is connected with a connector (42) which is connected with a connector of the multimeter (2) in an inserting mode, the multimeter (2) is connected with a shell (1) in a sliding mode, a channel (11) for the multimeter (2) to penetrate through is communicated with the side face of the shell (1), and the multimeter (2) is located in the channel (11); a through groove (13) is formed in the end face, facing the front face of the multimeter (2), of the shell (1), the through groove (13) is communicated with the channel (11), the through groove (13) is arranged opposite to a connecting port of the multimeter (2), and a plurality of accommodating devices (5) for accommodating the probe pens (41) and the detection lines (4) are mounted on the side face of the shell (1); a storage box (7) is mounted on the side face of the shell (1), a screwdriver (8) is placed in the storage box (7), and a sealing plate (71) for sealing the storage box (7) is mounted at an opening of the storage box (7); and a clamp (3) for clamping the wire is arranged on the side surface of the multimeter (2).

2. An electrical system fault diagnostic apparatus as claimed in claim 1, wherein: the receiving device (5) comprises a receiving cylinder (51) hinged with the shell (1), a torsional spring (61) is inserted into a hinged shaft between the accommodating cylinder (51) and the shell (1), one end of the torsion spring (61) is fixedly connected with the shell (1), the other end of the torsion spring (61) is fixedly connected with the containing cylinder (51), a pen container (52) is placed in the inner cavity of the accommodating cylinder (51), the pen container (52) is rotatably connected with the bottom end of the inner cavity of the accommodating cylinder (51), the pen container (52) rotates around the axis of the pen container (52), the probe pen (41) is inserted into the pen container (52), the inner cavity of the pen container (52) limits the probe pen (41) in the circumferential direction, one end, away from the bottom end of the inner cavity of the accommodating barrel (51), of the pen barrel (52) is provided with a rope collecting piece (53) for collecting the detection line (4).

3. An electrical system fault diagnostic apparatus as claimed in claim 2, wherein: the rope collecting piece (53) is a winding wheel (531), the winding wheel (531) and the pen container (52) rotate coaxially, a circular groove (533) for the probe pen (41) to penetrate through penetrates through the end face of the winding wheel (531), and the detecting line (4) is wound on the outer peripheral face of the winding wheel (531); the outer peripheral surface of the probe pen (41) protrudes outwards to form a limiting block (411), the inner peripheral surface of the pen barrel (52) is provided with a limiting groove (522), the length direction of the limiting groove (522) is consistent with the axial direction of the pen barrel (52), the limiting block (411) is clamped with the limiting groove (522) to slide, and the limiting groove (522) is used for circumferentially limiting the limiting block (411); the pen container (52) and the containing container (51) are fixedly inserted through a bolt (55).

4. An electrical system fault diagnostic apparatus as claimed in claim 3, wherein: one side, far away from the pen container (52), of the peripheral surface of the reel (531) is provided with a notch (532) for the detection line (4) to penetrate through, and the notch (532) is communicated with the circular groove (533).

5. An electrical system fault diagnostic apparatus as claimed in claim 1, wherein: the inside wall that leads to groove (13) relative is opened has activity mouth (14), activity mouth (14) orientation the connector setting of multimeter (2).

6. An electrical system fault diagnostic apparatus as claimed in claim 2, wherein: the outer peripheral surface of the pen container (52) is provided with anti-skid lines (523).

7. An electrical system fault diagnostic apparatus as claimed in claim 1, wherein: lead to groove (13) orientation the protruding sand grip (12) that have of inside wall of multimeter (2), the length direction of sand grip (12) with the slip direction of casing (1) is unanimous, open the side of multimeter (2) has spout (21), the length direction of spout (21) with the length direction of sand grip (12) is unanimous, sand grip (12) with spout (21) joint slides, spout (21) are right sand grip (12) carry out circumference spacing.

8. An electrical system fault diagnostic apparatus as claimed in claim 7, wherein: and a rubber pad for enhancing friction force is arranged in the groove of the sliding groove (21).

9. An electrical system fault diagnostic apparatus as claimed in claim 1, wherein: the side surface of the shell (1) along the length direction of the channel (11) is inwards protruded with a baffle (15) for the multimeter (2) to abut against, and a space for the clamp (3) to pass through is formed between the baffle (15) and the channel (11).

10. An electrical system fault diagnostic apparatus as claimed in claim 1, wherein: the multimeter (2) is provided with a display unit (9) for judging the circuit fault condition.

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