A multimeter testing equipment for electronic information engineering

Abstract

The present invention relates to the field of multimeter detection technology, and specifically to a multimeter detection device for electronic information engineering; it comprises a detection seat and a plug pin above the detection seat; a detection slot is arranged on the upper surface of the detection seat; the width of the detection slot is adapted to the width of the multimeter; the length of the detection slot is not less than the length of the multimeter; the detection slot is connected to the front outer wall of the detection seat; a square rod is vertically fixedly connected to the rear position of the upper surface of the detection seat; the outer wall of the square rod is slidably connected to a detection plate; the lower surface of the detection plate is connected to the upper surface of the detection seat by a first spring; the present invention places the multimeter to be tested into the positioned detection slot, so that the inverted U-shaped plug pin can directly connect the two corresponding sockets of the multimeter after moving downward, which greatly improves the detection efficiency of the multimeter compared with the original method of inserting and contacting two test leads in sequence, and meets the needs of batch detection.

Description

Technical Field

[0001] The invention relates to the technical field of multimeter detection, in particular to a multimeter detection device for electronic information engineering. Background Art

[0002] Multimeters are widely used in the field of electronic information engineering. After the multimeter is produced and assembled, and before it is put on the market, it is necessary to perform a functional test on the multimeter. Specifically, the tester picks up the multimeter to be tested and turns the knob on the multimeter so that the knob points to the buzzer gear after turning. Then, insert one end of the black test pen into the COM jack of the multimeter, that is, the first jack, and insert one end of the red test pen of the multimeter into the hole position of the voltage resistor capacitor and the diode of the multimeter, that is, the second jack. Finally, control the tip of the black test pen to contact the tip of the red test pen. If the multimeter emits a buzzing sound, it means that the multimeter function is intact. Otherwise, it means that the multimeter is damaged and is a faulty part. The existing multimeters rely on manual testing to complete the above-mentioned function testing. Manual testing requires turning the knob of the multimeter, inserting and contacting the test pen. The entire testing process is relatively backward, which affects the testing efficiency of mass-produced multimeters.

[0003] In view of this, in order to overcome the above technical problems, the present invention proposes a multimeter detection device for electronic information engineering, which solves the above technical problems. Summary of the invention

[0004] In order to make up for the shortcomings of the prior art, the present invention proposes a multimeter testing device for electronic information engineering. The present invention places the multimeter to be tested into a positioned testing slot so that the two corresponding sockets of the multimeter can be directly connected after the inverted U-shaped pin is moved downward. Compared with the original method of inserting and contacting two test leads in sequence, the detection efficiency of the multimeter is greatly improved to meet the needs of batch detection.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a multimeter detection device for electronic information engineering described in the present invention comprises a detection seat and a pin above the detection seat; a detection groove is arranged on the upper surface of the detection seat; the width of the detection groove is adapted to the width of the multimeter; the length of the detection groove is not less than the length of the multimeter; the detection groove is connected to the front outer wall of the detection seat; a square rod is vertically fixedly connected to the rear position of the upper surface of the detection seat; the outer wall of the square rod is slidably connected to the detection plate; the lower surface of the detection plate is connected to the upper surface of the detection seat by a first spring; the pin is made of an inverted U-shaped conductive material; the pin is fixedly connected to the lower surface of the detection board by an insulating block; after the multimeter is against the rear wall of the detection slot, the two lower needles of the pin are aligned with the two corresponding sockets of the multimeter in the detection slot.

[0006] Preferably, a avoidance groove adapted to the cross-section of the multimeter is arranged at the rear position of the bottom of the detection groove; the avoidance groove is slidingly sealed and connected to a avoidance plate; a one-way air outlet is arranged through the bottom of the avoidance groove; one-way air inlet is arranged through the upper and lower parts of the avoidance plate; the aperture of the one-way air outlet is larger than the aperture of the one-way air inlet; the lower surface of the avoidance plate is connected to the bottom of the avoidance groove by a second spring; the multimeter can overcome the elastic force of the second spring under the avoidance plate and move downward during the pin insertion process.

[0007] Preferably, the bottom of the detection groove from the avoidance groove to the front side of the detection seat is called a guide surface; the guide surface is arranged at an angle; the end of the guide surface close to the avoidance groove is lower than the end away from the avoidance groove; the end of the guide surface close to the avoidance groove is at the same height as the upper surface of the avoidance plate in the vertical direction; the lower surface of the avoidance plate and the bottom of the avoidance groove are connected by a limiting rope.

[0008] Preferably, a driven groove is provided on the rear groove wall of the detection groove; the driven groove is connected to the driven bar with a sliding seal; an active groove is provided on the front inner wall of the detection seat; the active groove is connected to the active bar with a sliding seal; one end of the active bar is connected to the bottom of the active groove by a third spring; the other end of the active bar extends to the front side of the detection seat; the bottom of the active groove and the bottom of the driven groove are connected by a first air hole.

[0009] Preferably, the lower surface of the detection plate is rotatably connected to a rotary seat at a position corresponding to the multimeter knob in the detection slot; the rotary seat is rotatably connected to the detection plate through a rotating column; the downward movement of the rotary seat can clamp the knob on the multimeter; the rotating column passes through the upper surface of the detection plate; the upper end of the rotating column is fixedly connected to a screw rod; the upper end of the square rod is fixedly connected to a cross plate; the cross plate is provided with threaded holes from top to bottom; the screw rod passes through the inner side of the threaded hole and cooperates with the threaded hole for threaded transmission.

[0010] Preferably, a card slot is provided on the lower surface of the rotary seat; a plurality of the card slots are arranged close to each other and cover the entire lower surface of the rotary seat; a card rod is slidably connected in the card slot; and the upper end of the card rod is connected to the bottom of the corresponding card slot through a fourth spring.

[0011] Preferably, adjacent bottoms of the card slots are connected via second air holes; the card rod is slidably and sealedly connected to the card slot; the second air holes are filled with a medium; a portion of the card rod squeezes the medium in the card slot and can be pushed into another portion of the bottom of the card slot along the second air holes.

[0012] Preferably, the threads of the screw are arranged on the upper outer wall of the screw; the lower outer wall of the screw is smooth and has a diameter smaller than the threaded hole; the rotary seat can drive multiple clamping rods to clamp the knob on the multimeter and then rotate it.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. The present invention places the multimeter to be tested into the positioned detection slot, so that the inverted U-shaped pin can directly connect the two corresponding jacks of the multimeter after moving downward. Compared with the original method of inserting and contacting two test leads in sequence, the detection efficiency of the multimeter is greatly improved to meet the needs of batch detection.

[0015] The present invention provides a downwardly movable avoidance plate at the bottom of the detection slot, so that when the pin is inserted into the corresponding socket on the multimeter, the avoidance plate can move downward to buffer and avoid the pressure on the multimeter, thereby reducing damage to the multimeter during the detection process.

[0016] The present invention drives the avoidance plate to move up by the second spring to form a negative pressure in the avoidance groove, so that the lower surface of the multimeter is adsorbed on the upper surface of the avoidance plate under the action of the negative pressure of the one-way air inlet hole on the avoidance plate, so that the pin can be smoothly pulled out of the socket on the multimeter, avoiding the situation where the multimeter moves up when the pin is pulled out of the socket, thereby improving the detection stability of the multimeter.

[0017] The present invention uses a clamping rod under the rotary seat to clamp the knob at any angle and realize rotation as the multimeter moves downward, so that there is no need to manually rotate the knob for detection during the detection process of the multimeter, thereby greatly improving the detection efficiency of the multimeter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0019] Figure 1 is a stereogram of the present invention;

[0020] Figure 2 yes Figure 1 A cross-sectional view of

[0021] Figure 3 is a cross-sectional view of the rotary seat and the clamping rod in the present invention;

[0022] Figure 4 is a cross-sectional view of a driven groove and an active groove in the present invention;

[0023] Figure 5 It is a three-dimensional diagram of the detection plate and the horizontal plate in the present invention.

[0024] In the figure: detection seat 1, detection groove 11, driven groove 111, driven bar 112, active groove 113, active bar 114, third spring 115, first air hole 116, avoidance groove 12, avoidance plate 13, one-way air outlet 14, one-way air inlet 15, second spring 16, guide surface 17, limit rope 18, pin 2, insulating block 21, square rod 3, detection plate 31, first spring 32, rotating seat 4, rotating column 41, screw 42, clamping groove 43, clamping rod 44, fourth spring 45, second air hole 46, cross plate 5, threaded hole 51. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0026] like Figures 1 to 5 As shown, the present invention includes the following embodiments:

[0027] Embodiment 1:

[0028] A multimeter detection device for electronic information engineering, comprising a detection seat 1 and a pin 2 above the detection seat 1; a detection slot 11 is arranged on the upper surface of the detection seat 1; the width of the detection slot 11 is adapted to the width of the multimeter; the length of the detection slot 11 is not less than the length of the multimeter; the detection slot 11 is connected to the front outer wall of the detection seat 1; a square rod 3 is vertically fixedly connected to the rear position of the upper surface of the detection seat 1; the outer wall of the square rod 3 is slidably connected to a detection plate 31; the lower surface of the detection plate 31 is connected to the upper surface of the detection seat 1 through a first spring 32; the pin 2 is made of an inverted U-shaped conductive material; the pin 2 is fixedly connected to the lower surface of the detection plate 31 through an insulating block 21; after the multimeter is against the rear wall of the detection slot 11, the two lower needles of the pin 2 are aligned with the two corresponding sockets of the multimeter in the detection slot 11.

[0029] In this embodiment, a avoidance groove 12 adapted to the cross-section of the multimeter is arranged at the rear position of the bottom of the detection groove 11; the avoidance groove 12 is slidingly sealed and connected to a avoidance plate 13; a one-way air outlet 14 is arranged through the bottom of the avoidance groove 12; one-way air inlet holes 15 are arranged through the upper and lower parts of the avoidance plate 13; the aperture of the one-way air outlet hole 14 is larger than that of the one-way air inlet hole 15; the lower surface of the avoidance plate 13 is connected to the bottom of the avoidance groove 12 by a second spring 16; the multimeter can overcome the elastic force of the second spring 16 under the avoidance plate 13 and move downward during the plugging process of the pin 2.

[0030] In this embodiment, the bottom of the detection groove 11 from the avoidance groove 12 to the front side of the detection seat 1 is called the guide surface 17; the guide surface 17 is arranged at an angle; the end of the guide surface 17 close to the avoidance groove 12 is lower than the end away from the avoidance groove 12; the end of the guide surface 17 close to the avoidance groove 12 is at the same height as the upper surface of the avoidance plate 13 in the vertical direction; the lower surface of the avoidance plate 13 and the bottom of the avoidance groove 12 are connected by a limiting rope 18.

[0031] In this embodiment, a driven groove 111 is provided on the rear groove wall of the detection groove 11; the driven groove 111 is connected to a driven strip 112 by a sliding seal; an active groove 113 is provided on the front inner wall of the detection seat 1; the active groove 113 is connected to an active strip 114 by a sliding seal; one end of the active strip 114 is connected to the bottom of the active groove 113 by a third spring 115; the other end of the active strip 114 extends to the front side of the detection seat 1; the bottom of the active groove 113 and the bottom of the driven groove 111 are connected by a first air hole 116.

[0032] During operation, after completing the assembly process of the multimeter, it is necessary to install the battery into the multimeter to prepare for the subsequent performance test. After moving multiple multimeters to be tested around the multimeter testing equipment, take the multimeter to be tested, turn the knob of the multimeter to the buzzer position, turn on the switch, and move the head of the multimeter along the detection slot 11 close to the front outer wall of the detection seat 1, so that the head of the multimeter is close to the rear position of the detection slot 11 along the detection slot 11, and the guide surface 17 guides the movement of the multimeter, so that the guide surface 17 can fall to the top of the avoidance plate 13 after moving toward the rear of the detection slot 11. In this state, the head of the multimeter will be against the rear wall of the detection slot 11 after moving, and the two needles of the pin 2 will be in contact with the inside of the detection slot 11. The jack of the multimeter is aligned, and then the detection plate 31 is controlled or pressed away from the upper surface of one end of the square rod 3. The detection plate 31 is pressed to overcome the elastic force of the first spring 32 and move downward. During the downward movement of the detection plate 31, the insulating block 21 on the lower surface is driven to move downward. During the downward movement of the insulating block 21, the inverted U-shaped pin 2 is driven to move downward. Since the two corresponding jacks on the multimeter are aligned with the two needles of the pin 2, the needle of the pin 2 can be smoothly inserted into the jack of the multimeter. In the process of inserting the pin 2 into the jack of the multimeter, there will be a certain resistance and impact force. The avoidance plate 13 will be pressed and moved downward during the process of inserting the pin 2 into the jack on the multimeter, thereby achieving avoidance and buffering of the multimeter and reducing the damage of the pin 2 inserted into the jack of the multimeter. The avoidance plate 13 moves downward During the process, the elastic force of the second spring 16 needs to be overcome, and the avoidance plate 13 will squeeze the gas in the avoidance groove 12 to be discharged along the one-way air outlet 14. The lower surface of the detection seat 1 is fixedly connected to the support leg, so that a gap is left between the lower surface of the detection seat 1 and the desktop for the one-way air outlet 14 to discharge gas. After the pin 2 overcomes the resistance and is inserted into the multimeter jack, the two corresponding jacks on the multimeter will be connected by the inverted U-shaped pin 2. In this way, listen to whether the multimeter will make a buzzing sound. If a buzzing sound is emitted, it means that the multimeter has no faults and can be put into use on the market. Otherwise, it means that there is a fault and rework and repair are required. After the pin 2 is inserted into the jack on the multimeter for a period of time, release the detection plate 31. The detection plate 31 will move upward under the elastic force of the first spring 32. The detection plate 31 During the upward movement, the insulating block 21 and the pin 2 will be driven upward, and the avoidance plate 13 will move upward under the elastic force of the second spring 16, so that negative pressure will be formed in the avoidance groove 12, and the external gas will enter the avoidance groove 12 along the gap between the lower surface of the multimeter and the upper surface of the avoidance plate 13 and along the one-way air inlet 15. Since the aperture of the one-way air inlet 15 is smaller than the one-way air outlet 14, the upward movement speed of the avoidance plate 13 is lower than the downward movement speed of the avoidance plate 13. On the one hand, it meets the need for buffering the multimeter when the avoidance plate 13 moves downward, and on the other hand, it prevents the avoidance plate 13 from moving upward too fast and pushing the multimeter out of the detection groove 11. Since the speed at which the external gas enters the avoidance groove 12 along the one-way air inlet 15 is limited, a negative pressure will still be formed at the opening of the one-way air inlet 15.The lower surface of the multimeter is not in close contact with the upper surface of the avoidance plate 13, but when the gap is limited, the lower surface of the multimeter will be subjected to the negative pressure adsorption force formed by the orifice of the one-way air inlet 15, so as to temporarily fix the multimeter upward, so that the multimeter will not lose contact with the avoidance plate 13, and when the upward movement speed of the avoidance plate 13 is lower than the upward movement speed of the detection plate 31, the distance between the detection plate 31 and the avoidance plate 13 will be increased, so that the detection plate 31 can drive the pin 2 to be smoothly pulled out of the socket on the multimeter. Since the multimeter is generally light, it will move upward during the process of the pin 2 being pulled out of the socket, and this situation can be effectively avoided by the adsorption of the one-way air inlet 15; the avoidance plate 13 will move upward to the elastic force of the second spring 16 to After the slot 12 is in the position of the slot, it cannot move up further due to the pull of the limit rope 18. Finally, the inspector directly presses the active bar 114, so that the active bar 114 moves toward the bottom of the active slot 113 and overcomes the movement of the third spring 115. The medium in the active slot 113 is pressurized to enter the driven slot 111 along the first air hole 116, so that the driven bar 112 extends along the slot of the driven slot 111. The driven bar 112 squeezes the multimeter in the detection slot 11, so that the multimeter moves toward the front side of the detection slot 11, and the tail of the multimeter is tilted under the action of the guide surface 17. The tail of the multimeter extends from the front position of the detection slot 11, which is convenient for the inspector to take it. Then a new multimeter to be tested is placed in the detection slot 11, and the above detection action is repeated;

[0033] The present invention places the multimeter to be tested into the positioned detection slot 11, so that the inverted U-shaped pin 2 can directly connect the two corresponding sockets of the multimeter after moving downward. Compared with the original method of inserting and contacting two test leads in sequence, the detection efficiency of the multimeter is greatly improved, and the batch detection requirements are met;

[0034] The present invention provides a downwardly movable avoidance plate 13 at the bottom of the detection slot 11, so that when the pin 2 is inserted into the corresponding socket on the multimeter, the avoidance plate 13 can move downward to buffer and avoid the pressure on the multimeter, thereby reducing the damage caused to the multimeter during the detection process;

[0035] The present invention drives the avoidance plate 13 to move upward through the second spring 16 to form a negative pressure in the avoidance groove 12, so that the lower surface of the multimeter is adsorbed on the upper surface of the avoidance plate 13 under the action of the orifice-shaped negative pressure of the one-way air inlet hole 15 on the avoidance plate 13, so that the pin 2 can be smoothly pulled out of the socket on the multimeter, avoiding the situation where the multimeter moves up when the pin 2 is pulled out of the socket, thereby improving the detection stability of the multimeter.

[0036] Embodiment 2:

[0037] The lower surface of the detection plate 31 is rotatably connected to the rotary seat 4 at a position corresponding to the multimeter knob in the detection slot 11; the rotary seat 4 is rotatably connected to the detection plate 31 through a rotating column 41; the rotary seat 4 moves downward to clamp the knob on the multimeter; the rotating column 41 passes through the upper surface of the detection plate 31; the upper end of the rotating column 41 is fixedly connected to the screw rod 42; the upper end of the square rod 3 is fixedly connected to the cross plate 5; the cross plate 5 is penetrated by threaded holes 51 from top to bottom; the screw rod 42 passes through the inner side of the threaded hole 51 and is threadedly matched with the threaded hole 51.

[0038] In this embodiment, a card slot 43 is provided on the lower surface of the rotating seat 4; multiple card slots 43 are arranged close to each other and cover the entire lower surface of the rotating seat 4; a card rod 44 is slidably connected in the card slot 43; the upper end of the card rod 44 is connected to the bottom of the corresponding card slot 43 through a fourth spring 45.

[0039] In this embodiment, the bottoms of adjacent card slots 43 are connected via second air holes 46; the card rod 44 is slidably and sealedly connected to the card slot 43; the second air holes 46 are filled with a medium; a portion of the card rod 44 squeezes the medium in the card slot 43 and can be pushed along the second air holes 46 to the bottom of another portion of the card slot 43.

[0040] In this embodiment, the thread of the screw rod 42 is arranged on the upper outer wall of the screw rod 42; the lower outer wall of the screw rod 42 is smooth and has a diameter smaller than the threaded hole 51; the rotary seat 4 can drive multiple clamping rods 44 to clamp the knob on the multimeter and then rotate it.

[0041] During operation, after the staff member moves the head of the multimeter with the battery installed toward the inside of the detection slot 11 and into the detection slot 11, the head of the multimeter will rest against the rear wall of the detection slot 11, and the multimeter will be directly above the avoidance plate 13. The detection plate 31 is then controlled to move downward, and the detection plate 31 will drive the rotating column 41 and the insulating block 21 to move downward. The rotating column 41 will drive the rotating seat 4 to move downward during the downward movement, and the rotating seat 4 will drive the clamping rod 44 to move downward during the downward movement. The rotating column 41 will drive the unthreaded outer wall of the screw 42 to move in the threaded hole 51 during the downward movement, so that the rotating seat 4 will drive the clamping rod 44 to move downward while keeping it from rotating. Some of the clamping rods 44 will not be able to continue to move downward due to the obstruction of the multimeter knob, while the other parts of the clamping rods 44 will not be able to continue to move downward. The knob continues to move downward, and the rotary seat 4 continues to move downward, which will cause the locking rod 44 blocked by the knob to retract into the corresponding slot 43. During the process of retracting the locking rod 44 into the corresponding slot 43, the elastic force of the corresponding fourth spring 45 is squeezed. The bottoms of all the slots 43 are connected through the second air holes 46, and a medium is provided in the second air holes 46, so that the locking rod 44 squeezed by the knob and retracted into the slot 43 can transmit force to the locking rod 44 not squeezed by the knob through the medium, so that the locking rod 44 not blocked by the knob is difficult to retract into the corresponding slot 43 when further locked, thereby achieving further locking of the locking rod 44 under the rotary seat 4, and when some of the locking rods 44 are squeezed by the knob, Under the squeezing of the button, the pin 2 will also be inserted into the corresponding jack of the multimeter. As the detection plate 31 continues to move downward, the detection plate 31 will drive the rotating column 41 and the screw 42 above the rotating column 41 to continue to move downward, so that the movement of the screw 42 in the threaded hole 51 is transitioned from the outer wall without threads to the outer wall with the threaded hole 51, thereby realizing the threaded transmission of the screw 42 and the threaded hole 51. In the process of the rotating seat moving downward, all the card rods 44 will be driven to squeeze the multimeter, and the avoidance plate 13 under the multimeter will avoid and buffer the downward movement of the multimeter. The screw 42 will drive the rotating column 41 to rotate during the threaded transmission process, and the rotating column 41 will drive the rotating seat 4 below to rotate during the rotation process, and all the card rods below will be driven during the rotation process. The rod 44 rotates, and because part of the clamping rod 44 is retracted, the clamping rod 44 below the rotary seat 4 can clamp the knob on the multimeter. The rotary seat 4 rotates and drives the clamping rod 44 below to rotate, which will drive the knob to rotate. The knob on the multimeter can be rotated at will after the two jacks are connected, until the knob rotates to the buzzer position at the clamping rod 44 below the rotary seat 4, and a buzzer sound is emitted, thereby judging whether the multimeter is good or bad. The depth of the avoidance groove 12 is sufficient to allow the clamping rod 44 to drive the knob to rotate one circle. After completing the detection of the multimeter, the detection plate 31 is released, and the detection plate 31 will move upward under the action of the first spring 32, so that the detection plate 31 drives the clamping rod 44 below the rotary seat 4 to disengage from the knob, and the pin 2 will also disengage from the jack;

[0042] In this embodiment, the clamping rod 44 below the rotary seat 4 can clamp the knob at any angle and rotate as the multimeter moves downward. This eliminates the need to manually turn the knob during the detection of the multimeter, greatly improving the detection efficiency of the multimeter.

[0043] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multimeter detection device for electronic information engineering, characterized in that: The invention comprises a detection seat (1) and a plug pin (2) above the detection seat (1); a detection slot (11) is arranged on the upper surface of the detection seat (1); the width of the detection slot (11) is adapted to the width of a multimeter; the length of the detection slot (11) is not less than the length of the multimeter; the detection slot (11) is communicated with the front outer wall of the detection seat (1); a square rod (3) is vertically fixedly connected to the rear position of the upper surface of the detection seat (1); the outer wall of the square rod (3) is slidably connected to a detection plate (31); the lower surface of the detection plate (31) is connected to the upper surface of the detection seat (1) via a first spring (32); the plug pin (2) is made of an inverted U-shaped conductive material; the plug pin (2) is fixedly connected to the lower surface of the detection plate (31) via an insulating block (21); after the multimeter is against the rear wall of the detection slot (11), the two lower needles of the plug pin (2) are aligned with two corresponding sockets of the multimeter in the detection slot (11); The bottom of the detection slot (11) is provided with an avoidance slot (12) adapted to the cross-section of the multimeter at the rear position; the avoidance slot (12) is slidably sealed and connected to the avoidance plate (13); the bottom of the avoidance slot (12) is provided with a one-way air outlet (14); the avoidance plate (13) is provided with one-way air inlet (15) at the top and bottom; the one-way air outlet (14) has a larger aperture than the one-way air inlet (15); the lower surface of the avoidance plate (13) is connected to the bottom of the avoidance slot (12) via a second spring (16); and the multimeter can overcome the elastic force of the second spring (16) below the avoidance plate (13) and move downward during the insertion of the pin (2).

2. The multimeter detection device for electronic information engineering according to claim 1, characterized in that: The bottom of the detection groove (11) from the avoidance groove (12) to the front side of the detection seat (1) is called a guide surface (17); the guide surface (17) is arranged obliquely; the end of the guide surface (17) close to the avoidance groove (12) is lower than the end away from the avoidance groove (12); the end of the guide surface (17) close to the avoidance groove (12) is at the same height as the upper surface of the avoidance plate (13) in the vertical direction; the lower surface of the avoidance plate (13) and the bottom of the avoidance groove (12) are connected by a limiting rope (18).

3. The multimeter detection device for electronic information engineering according to claim 1, characterized in that: The detection slot (11) is provided with a driven slot (111) on the rear slot wall; the driven slot (111) is slidably sealed and connected to a driven strip (112); the detection seat (1) is provided with an active slot (113) on the front inner wall; the active slot (113) is slidably sealed and connected to an active strip (114); one end of the active strip (114) is connected to the bottom of the active slot (113) via a third spring (115); the other end of the active strip (114) extends to the front side of the detection seat (1); the bottom of the active slot (113) and the bottom of the driven slot (111) are connected via a first air hole (116).

4. The multimeter detection device for electronic information engineering according to claim 1, characterized in that: The lower surface of the detection plate (31) is rotatably connected to a rotary seat (4) at a position corresponding to the multimeter knob in the detection slot (11); the rotary seat (4) is rotatably connected to the detection plate (31) via a rotating column (41); the rotary seat (4) can be moved downward to clamp the knob on the multimeter; the rotating column (41) passes through the upper surface of the detection plate (31); the upper end of the rotating column (41) is fixedly connected to a screw rod (42); the upper end of the square rod (3) is fixedly connected to a cross plate (5); the cross plate (5) is penetrated by threaded holes (51) at the top and bottom; the screw rod (42) passes through the inner side of the threaded hole (51) and is threadedly matched with the threaded hole (51).

5. The multimeter detection device for electronic information engineering according to claim 4, characterized in that: The lower surface of the rotating seat (4) is provided with a clamping groove (43); a plurality of the clamping grooves (43) are arranged close to each other and cover the entire lower surface of the rotating seat (4); a clamping rod (44) is slidably connected in the clamping groove (43); the upper end of the clamping rod (44) is connected to the bottom of the corresponding clamping groove (43) via a fourth spring (45).

6. The multimeter detection device for electronic information engineering according to claim 5, characterized in that: The bottoms of adjacent card slots (43) are connected via second air holes (46); the card rod (44) is slidably sealed with the card slot (43); the second air holes (46) are filled with a medium; a portion of the card rod (44) squeezes the medium in the card slot (43) so that the medium can be pushed along the second air holes (46) to the bottom of another portion of the card slot (43).

7. The multimeter detection device for electronic information engineering according to claim 5, characterized in that: The threads of the screw rod (42) are arranged on the upper outer wall of the screw rod (42); the lower outer wall of the screw rod (42) is smooth and has a diameter smaller than the threaded hole (51); the rotary seat (4) can drive a plurality of clamping rods (44) to clamp the knob on the multimeter and then rotate it.

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