阅读说明：本技术 一种具有防误触功能的节能型万用表 (Energy-saving universal meter with function of preventing false touch ) 是由 刘晓慧 于 2019-11-06 设计创作，主要内容包括：本发明涉及一种具有防误触功能的节能型万用表,包括主体、两个电缆、两个表笔和两个探头,还包括两个检测机构和两个发电机构,检测机构包括检测针、限位组件、弹簧、丝杆、滑槽、移动块、连接杆和定位组件,发电机构包括支撑杆、滚珠丝杠轴承、第二齿轮和两个发电组件,发电组件包括发电机、驱动轴、支撑杆、单向轴承和第一齿轮,限位组件包括限位槽和限位块,定位组件包括连接槽、连接块和弹性条,该具有防误触功能的节能型万用表中,通过检测机构实现了检测针的伸缩,使万用表可以精确测量较为密集的引脚,提高了万用表的实用性,通过发电机构可以将丝杆的动能转换成电能,之后将电能供给万用表使用,延长了万用表的续航时间。(The invention relates to an energy-saving multimeter with a false touch prevention function, which comprises a main body, two cables, two meter pens, two probes, two detection mechanisms and two power generation mechanisms, wherein each detection mechanism comprises a detection pin, a limiting component, a spring, a lead screw, a chute, a movable block, a connecting rod and a positioning component, each power generation mechanism comprises a supporting rod, a ball screw bearing, a second gear and two power generation components, each power generation component comprises a power generator, a driving shaft, a supporting rod, a one-way bearing and a first gear, each limiting component comprises a limiting groove and a limiting block, each positioning component comprises a connecting groove, a connecting block and an elastic strip, the detection mechanisms are used for realizing the extension and retraction of the detection pins, so that the multimeter can accurately measure dense pins, the practicability of the multimeter is improved, and the kinetic energy of the lead screw can be converted into electric energy through the power generation mechanisms, and then, the electric energy is supplied to the universal meter for use, so that the endurance time of the universal meter is prolonged.)

1. The energy-saving multimeter with the function of preventing false touch comprises a main body (1), two cables (4), two meter pens (2) and two probes (5), wherein the meter pens (2) and the probes (5) are cylindrical, one ends of the two meter pens (2) are connected with the main body (1) through the cables (4), the meter pens (2) and the probes (5) are coaxially arranged, the other ends of the meter pens (2) are fixedly connected with one ends of the probes (5), the energy-saving multimeter is characterized by further comprising two detection mechanisms and two power generation mechanisms, a cavity is arranged inside the meter pens (2), the two detection mechanisms are respectively arranged inside the two meter pens (2), the two power generation mechanisms are respectively arranged inside the two meter pens (2), and the detection mechanisms are connected with the power generation mechanisms;

the detection mechanism comprises a detection needle (6), a limiting component, a spring (9), a lead screw (3), a sliding groove (21), a moving block (22), a connecting rod (23) and a positioning component, wherein the probe (5) is internally provided with a through hole which is coaxial with the probe (5), the detection needle (6) and the lead screw (3) are both coaxially arranged with the stylus (2), one end of the detection needle (6) is arranged in the probe (5), one end of the detection needle (6) and one end of the probe (5) far away from the stylus (2) are positioned in the same plane, the length of the detection needle (6) is greater than that of the probe (5), the detection needle (6) is connected with the probe (5) in a sliding and sealing manner, the limiting component is arranged on the inner wall of one side of the through hole of the probe (5), and the detection needle (6) is connected with the probe (5) through the limiting component, the spring (9) is sleeved on the detection needle (6), the other end of the detection needle (6) is fixedly connected with the inner wall of one end, close to the probe (5), of the meter pen (2) through the spring (9), the spring (9) is in a compression state, the length of the lead screw (3) is smaller than that of the meter pen (2), one end of the lead screw (3) is fixedly connected with the other end of the detection needle (6), the sliding chute (21) is parallel to the lead screw (3), the sliding chute (21) is arranged on one side, away from one end of the probe (5), of the meter pen (2), the length of the sliding chute (21) is larger than the difference between the lengths of the detection needle (6) and the probe (5), the connecting rod (23) is arranged inside the sliding chute (21), the connecting rod (23) is slidably connected with the sliding chute (21), the connecting rod (23) is perpendicular to the lead screw (3), one end of the connecting rod (23) is fixedly connected with one end, away from the detection needle (6), of the lead screw (3), the other end of the connecting rod (23) is fixedly connected with the moving block (22), and the detection needle (6) and the probe (5) are electrically connected with the cable (4);

the power generation mechanism comprises a support rod (14), a ball screw bearing (12), a second gear (17) and two power generation assemblies, wherein the ball screw bearing (12) is installed on a screw rod (3), the outer ring of the ball screw bearing (12) is fixedly connected with the inner wall of a meter pen (2) through the support rod (14), the inner ring of the ball screw bearing (12) is matched with the screw rod (3), the second gear (17) is installed on the periphery of the inner ring of the ball screw bearing (12), the two power generation assemblies are both arranged on the support rod (14), and the two power generation assemblies are both connected with the second gear (17);

the power generation assembly comprises a power generator (13), a driving shaft (16), a supporting rod (15), one-way bearings (10) and a first gear (11), the power generator (13) is fixedly connected with the supporting rod (14), the driving shaft (16) is parallel to the screw rod (3), the driving shaft (16) is in transmission connection with the power generator (13), the first gear (11) is connected with the driving shaft (16) through the one-way bearings (10), the supporting rod (15) is installed on the driving shaft (16), the rotating directions of the two one-way bearings (10) are opposite, and the first gear (11) is meshed with the second gear (17).

2. The energy-saving multimeter with the function of preventing accidental touch according to claim 1, wherein a PLC is disposed inside the main body (1), a display screen and at least two control keys are disposed on the main body (1), and the display screen and each control key are electrically connected to the PLC.

3. The energy-saving multimeter having a false touch prevention function according to claim 1, wherein the number of teeth of the second gear (17) is greater than the number of teeth of the first gear (11).

4. The energy-saving multimeter with the function of preventing false touch according to claim 1, wherein the limiting component comprises a limiting groove (7) and a limiting block (8), the limiting groove (7) is parallel to the detection needle (6), the length of the limiting groove (7) is smaller than that of the probe (5), the limiting groove (7) is arranged on the inner wall of one side of the probe (5), the limiting block (8) is arranged on one side of the detection needle (6), the limiting block (8) is matched with the limiting groove (7), the limiting block (8) is arranged inside the limiting groove (7), and the limiting block (8) is connected with the limiting groove (7) in a sliding manner.

5. The energy-saving multimeter with the function of preventing false touches as claimed in claim 1, wherein the positioning component comprises a connecting groove (18), a connecting block (19) and an elastic strip (20), the length of the elastic strip (20) is greater than that of the sliding groove (21), the elastic strip (20) is parallel to the screw rod (3), the elastic strip (20) is arranged on one side of the moving block (22) close to the probe (5), one end of the elastic strip (20) is fixedly connected with the moving block (22), the connecting block (19) is arranged on one side of the other end of the elastic strip (20) close to the stylus (2), the connecting groove (18) is arranged on one side of the stylus (2) close to the elastic strip (20), the connecting groove (18) is matched with the connecting block (19), the connecting groove (18) is arranged on one side of the sliding groove (21) close to the probe (5), the shortest distance between the connecting groove (18) and the sliding groove (21) is smaller than the difference of the lengths of the detection needle (6) and the probe (5).

6. The energy-saving multimeter with the function of preventing false touches according to claim 1, wherein the lead screw (3) and the stylus (2) are made of insulating materials.

7. The energy-saving multimeter with false touch prevention capability of claim 1, wherein the probe (5) is coated with an anti-corrosion coating.

8. The energy-saving multimeter with false touch prevention function of claim 1, wherein sealing strips are disposed on the inner walls of both sides of the sliding slot (21), and the sides of the two sealing strips close to each other abut against each other.

9. The energy-saving multimeter having a false touch prevention function as claimed in claim 1, wherein the lead screw (3) is coated with grease.

10. The energy-saving multimeter having a false touch prevention function as claimed in claim 1, wherein the moving block (22) is provided with anti-skid stripes.

Technical Field

The invention relates to the field of integrated circuit measuring equipment, in particular to an energy-saving multimeter with a false touch prevention function.

Background

The universal meter is also called as multiplex meter, multi-purpose meter, triple meter, multi-purpose meter, etc. generally, it is mainly aimed at measuring voltage, current and resistance, and is divided into pointer universal meter and digital universal meter according to display mode, so that it is a multifunctional multi-range measuring meter, and can be used for measuring D.C. current, D.C. voltage, A.C. current, A.C. voltage, resistance and audio-frequency level, etc. and also can be used for measuring A.C. current, capacitance, inductance and some parameters of semiconductor, etc..

The universal meter is widely used in the detection of the integrated circuit, when an operator uses the universal meter to measure the integrated circuit board, if the distance between the pins of the components on the integrated circuit board is smaller, the operator cannot accurately contact the meter pen with a single pin, the probability of mistakenly touching the universal meter is increased, and moreover, in the using process of the universal meter, the universal meter needs to consume more electric energy, and for some universal meters powered by a storage battery, the endurance time of the universal meter is limited, and the practicability of the universal meter is further reduced.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the energy-saving multimeter with the function of preventing false touch is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: an energy-saving multimeter with a function of preventing false touch comprises a main body, two cables, two meter pens, two probes, two detection mechanisms and two power generation mechanisms, wherein the meter pens and the probes are cylindrical, one ends of the two meter pens are connected with the main body through the cables, the meter pens and the probes are coaxially arranged, the other ends of the meter pens are fixedly connected with one ends of the probes, the interior of the meter pens is provided with a cavity, the two detection mechanisms are respectively arranged inside the two meter pens, the two power generation mechanisms are respectively arranged inside the two meter pens, and the detection mechanisms are connected with the power generation mechanisms;

the detection mechanism comprises a detection needle, a limiting component, a spring, a lead screw, a sliding chute, a moving block, a connecting rod and a positioning component, wherein the detection needle, the limiting component, the spring, the lead screw, the sliding chute, the moving block, the connecting rod and the positioning component are coaxially arranged in the probe, the detection needle and the lead screw are coaxially arranged with the meter pen, one end of the detection needle is arranged in the probe, one end of the detection needle and one end of the probe, which is far away from the meter pen, are positioned in the same plane, the length of the detection needle is greater than that of the probe, the detection needle and the probe are in sliding and sealing connection, the limiting component is arranged on the inner wall of one side of the through hole of the probe, the detection needle is connected with the probe through the limiting component, the spring is sleeved on the detection needle, the other end of the detection needle is fixedly connected with the inner wall of one end, which is close to the, one end of the lead screw is fixedly connected with the other end of the detection needle, the chute is parallel to the lead screw, the chute is arranged on one side of the meter pen, which is far away from one end of the probe, the length of the chute is greater than the difference between the lengths of the detection needle and the probe, the connecting rod is arranged inside the chute, the connecting rod is in sliding connection with the chute, the connecting rod is perpendicular to the lead screw, one end of the connecting rod is fixedly connected with one end of the lead screw, which is far away from the detection needle, the other end of the connecting rod is fixedly connected with the moving block, and the detection needle and the probe are both electrically connected with a cable;

the power generation mechanism comprises a support rod, a ball screw bearing, a second gear and two power generation assemblies, wherein the ball screw bearing is arranged on a screw rod, the outer ring of the ball screw bearing is fixedly connected with the inner wall of the meter pen through the support rod, the inner ring of the ball screw bearing is matched with the screw rod, the second gear is arranged on the periphery of the inner ring of the ball screw bearing, the two power generation assemblies are arranged on the support rod, and the two power generation assemblies are connected with the second gear;

the power generation assembly comprises a power generator, a driving shaft, a supporting rod, a one-way bearing and a first gear, the power generator is fixedly connected with the supporting rod, the driving shaft is parallel to the screw rod, the driving shaft is in transmission connection with the power generator, the first gear is connected with the driving shaft through the one-way bearing, the supporting rod is installed on the driving shaft, the rotating directions of the two one-way bearings are opposite, and the first gear is meshed with the second gear.

Preferably, in order to improve the automation degree of the multimeter, the main body is internally provided with a PLC, the main body is provided with a display screen and at least two control keys, and the display screen and the control keys are electrically connected with the PLC.

Preferably, in order to increase the rotation speed of the first gear, the number of teeth of the second gear is larger than that of the first gear.

Preferably, in order to improve the stability of the connection between the detection needle and the probe, the limiting assembly comprises a limiting groove and a limiting block, the limiting groove is parallel to the detection needle, the length of the limiting groove is smaller than that of the probe, the limiting groove is formed in the inner wall of one side of the probe, the limiting block is arranged on one side of the detection needle and matched with the limiting groove, the limiting block is arranged in the limiting groove, and the limiting block is connected with the limiting groove in a sliding mode.

Preferably, in order to position the moving block, the positioning assembly includes a connection groove, a connection block and an elastic strip, the length of the elastic strip is greater than that of the sliding groove, the elastic strip is parallel to the lead screw, the elastic strip is disposed on one side of the moving block close to the probe, one end of the elastic strip is fixedly connected with the moving block, the connection block is disposed on one side of the other end of the elastic strip close to the meter pen, the connection groove is disposed on one side of the meter pen close to the elastic strip, the connection groove is matched with the connection block, the connection groove is disposed on one side of the sliding groove close to the probe, and the shortest distance between the connection groove and the sliding groove is smaller than the difference between the lengths of the detection needle and.

Preferably, in order to improve the safety of the multimeter, the lead screw and the meter pen are made of insulating materials.

Preferably, the probe is coated with a corrosion resistant coating to extend the useful life of the probe.

Preferably, in order to improve the dustproof performance of the sliding groove, sealing strips are arranged on the inner walls of the two sides of the sliding groove, and one sides, close to each other, of the two sealing strips are abutted against each other.

Preferably, the lead screw is coated with grease in order to reduce wear of the lead screw.

Preferably, in order to reduce the probability of the sliding of the moving block, the moving block is provided with anti-sliding grains.

The energy-saving universal meter with the function of preventing false touch has the advantages that the detection needles are stretched through the detection mechanism, so that the universal meter can accurately measure more dense pins, the practicability of the universal meter is improved, compared with the existing detection mechanism, the detection mechanism can clean the detection needles while winding and unwinding the detection needles, the service life of the detection needles is prolonged, in addition, the kinetic energy of the lead screw can be converted into electric energy through the power generation mechanism, then the electric energy is supplied to the universal meter for use, the endurance time of the universal meter is prolonged, compared with the existing power generation mechanism, the power generation mechanism can convert all the kinetic energy generated by the reciprocating movement of the lead screw through the two power generation assemblies in the reciprocating movement process of the lead screw, and the efficiency of energy conversion is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of an energy-saving multimeter having a false touch prevention function according to the present invention;

FIG. 2 is a schematic structural diagram of a detection mechanism of an energy-saving multimeter having a false touch prevention function according to the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 1;

FIG. 4 is a schematic structural diagram of a positioning assembly of an energy-saving multimeter having a false touch prevention function according to the present invention;

in the figure: 1. the measuring instrument comprises a main body, 2. a gauge pen, 3. a screw rod, 4. a cable, 5. a probe, 6. a detection needle, 7. a limit groove, 8. a limit block, 9. a spring, 10. a one-way bearing, 11. a first gear, 12. a ball screw bearing, 13. a generator, 14. a support rod, 15. a support rod, 16. a driving shaft, 17. a second gear, 18. a connecting groove, 19. a connecting block, 20. an elastic strip, 21. a sliding groove, 22. a moving block and 23. a connecting rod.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1, an energy-saving multimeter with a false touch prevention function comprises a main body 1, two cables 4, two styluses 2 and two probes 5, wherein the styluses 2 and the probes 5 are both cylindrical, one ends of the two styluses 2 are both connected with the main body 1 through the cables 4, the styluses 2 and the probes 5 are coaxially arranged, the other ends of the styluses 2 are fixedly connected with one ends of the probes 5, the multimeter further comprises two detection mechanisms and two power generation mechanisms, a cavity is arranged inside the styluses 2, the two detection mechanisms are respectively arranged inside the two styluses 2, the two power generation mechanisms are respectively arranged inside the two styluses 2, and the detection mechanisms are connected with the power generation mechanisms;

the extension and retraction of the detection needle 6 are realized through the detection mechanism, so that the universal meter can accurately measure more dense pins, the practicability of the universal meter is improved, the kinetic energy of the lead screw 3 can be converted into electric energy through the power generation mechanism, then the electric energy is supplied to the universal meter for use, and the endurance time of the universal meter is prolonged;

as shown in fig. 2, the detection mechanism includes a detection needle 6, a limiting component, a spring 9, a lead screw 3, a sliding groove 21, a moving block 22, a connecting rod 23 and a positioning component, the probe 5 is provided with a through hole coaxially arranged with the probe 5, the detection needle 6 and the lead screw 3 are both arranged coaxially with the stylus 2, one end of the detection needle 6 is arranged inside the probe 5, one end of the detection needle 6 and one end of the probe 5 far away from the stylus 2 are in the same plane, the length of the detection needle 6 is greater than that of the probe 5, the detection needle 6 and the probe 5 are connected in a sliding and sealing manner, the limiting component is arranged on the inner wall of one side of the through hole of the probe 5, the detection needle 6 is connected with the probe 5 through the limiting component, the spring 9 is sleeved on the detection needle 6, the other end of the detection needle 6 is fixedly connected with the inner wall of one end of the stylus 2 close to the probe 5 through the spring 9, the spring 9 is in a compressed state, the length of the lead screw 3 is smaller than that of the meter pen 2, one end of the lead screw 3 is fixedly connected with the other end of the detection needle 6, the chute 21 is parallel to the lead screw 3, the chute 21 is arranged on one side of one end, far away from the probe 5, of the meter pen 2, the length of the chute 21 is larger than the difference between the lengths of the detection needle 6 and the probe 5, the connecting rod 23 is arranged inside the chute 21, the connecting rod 23 is in sliding connection with the chute 21, the connecting rod 23 is perpendicular to the lead screw 3, one end of the connecting rod 23 is fixedly connected with one end, far away from the detection needle 6, of the lead screw 3, the other end of the connecting rod 23 is fixedly connected with the moving block 22, and the detection needle 6 and the probe 5 are both;

the firmness of the connection between the probe 5 and the detection needle 6 is improved through the limiting component, the stability of the lead screw 3 is improved through the connecting rod 23 by the limiting effect of the chute 21 on the connecting rod 23, when more dense pins need to be detected, an operator manually pushes the movable block 22 to move towards the direction close to the probe 5, the movable block 22 is fixed through the positioning component, under the transmission action of the connecting rod 23, the lead screw 3 is driven to move towards the direction close to the probe 5 through the movable block 22, the detection needle 6 is pushed to move to the outside of the probe 5 along the probe 5 through the lead screw 3, the detection needle 6 can accurately detect the more dense pins due to the small diameter of the detection needle 6, the probability of mistaken touch is reduced, after the use is finished, the operator triggers the positioning component to enable the movable block 22 to move, and then the detection needle 6 is driven to be taken into the probe 5 through the spring 9, the detection needle 6 is accommodated, the screw rod 3 box is driven by the detection needle 6 to move in the direction away from the probe 5, the detection needle 6 can be cleaned by the probe 5 while the detection needle 6 moves, and the service life of the detection needle 6 is prolonged;

as shown in fig. 3, the power generation mechanism includes a support rod 14, a ball screw bearing 12, a second gear 17 and two power generation assemblies, the ball screw bearing 12 is mounted on the screw rod 3, an outer ring of the ball screw bearing 12 is fixedly connected with an inner wall of the stylus 2 through the support rod 14, an inner ring of the ball screw bearing 12 is matched with the screw rod 3, the second gear 17 is mounted on an outer periphery of the inner ring of the ball screw bearing 12, the two power generation assemblies are both arranged on the support rod 14, and the two power generation assemblies are both connected with the second gear 17;

as shown in fig. 3, the power generation assembly comprises a power generator 13, a driving shaft 16, a supporting rod 15, one-way bearings 10 and a first gear 11, wherein the power generator 13 is fixedly connected with the supporting rod 14, the driving shaft 16 is parallel to the screw rod 3, the driving shaft 16 is in transmission connection with the power generator 13, the first gear 11 is connected with the driving shaft 16 through the one-way bearings 10, the supporting rod 15 is mounted on the driving shaft 16, the rotation directions of the two one-way bearings 10 are opposite, and the first gear 11 is meshed with a second gear 17;

the stability of the ball screw bearing 12 and the generator 13 is improved by the support rod 14, and when the screw 3 moves, the screw 3 drives the inner ring of the ball screw bearing 12 to rotate, so that the second gear 17 rotates, the first gear 11 is driven to rotate through the second gear 17, under the connecting action of the one-way bearing 10, the driving shaft 16 is driven to rotate through the first gear 11, the generator 13 is driven to operate by the driving shaft 16, and when the screw rod 3 moves reversely, the first gear 11 is disengaged from the driving shaft 16 by the one-way bearing 10, the driving shaft 16 can continuously rotate under the inertia action of the inertia wheel 15, the generating capacity of the generator 13 is improved, the endurance time of the multimeter is prolonged, the two generators 13 respectively convert the kinetic energy generated by the forward and reverse movement of the screw rod 3, so that the energy conversion efficiency is improved, and the generating capacity of the generators 13 is increased.

Preferably, in order to improve the automation degree of the multimeter, a PLC is arranged inside the main body 1, a display screen and at least two control keys are arranged on the main body 1, and the display screen and the control keys are electrically connected with the PLC;

the PLC is a programmable logic controller, which adopts a programmable memory for storing programs therein, executing instructions facing users such as logic operation, sequence control, timing, counting, arithmetic operation and the like, and controlling various types of machinery or production processes through digital or analog input/output, and is essentially a computer specially used for industrial control, the hardware structure of the PLC is basically the same as that of a microcomputer, the PLC is generally used for processing data and receiving and outputting instructions and is used for realizing central control, an operator sends a control signal to the PLC through a control key, the PLC controls the operation of a universal meter, and meanwhile, the working state of the universal meter can be displayed through a display screen, so that the automation degree of the universal meter is improved.

Preferably, the number of teeth of the second gear 17 is larger than that of the first gear 11 in order to increase the rotation speed of the first gear 11.

As shown in fig. 2, the limiting assembly includes a limiting groove 7 and a limiting block 8, the limiting groove 7 is parallel to the detection needle 6, the length of the limiting groove 7 is smaller than that of the probe 5, the limiting groove 7 is arranged on the inner wall of one side of the probe 5, the limiting block 8 is arranged on one side of the detection needle 6, the limiting block 8 is matched with the limiting groove 7, the limiting block 8 is arranged inside the limiting groove 7, and the limiting block 8 is slidably connected with the limiting groove 7;

through the limiting effect of limiting groove 7 on limiting block 8, the probability that detection needle 6 drops from probe 5 is reduced through limiting block 8, and the firmness of connection of detection needle 7 and probe 5 is improved.

As shown in fig. 4, the positioning assembly includes a connecting groove 18, a connecting block 19 and a resilient strip 20, the length of the resilient strip 20 is greater than that of the sliding groove 21, the resilient strip 20 is parallel to the screw rod 3, the resilient strip 20 is disposed on one side of the moving block 22 close to the probe 5, one end of the resilient strip 20 is fixedly connected to the moving block 22, the connecting block 19 is disposed on one side of the other end of the resilient strip 20 close to the stylus 2, the connecting groove 18 is disposed on one side of the stylus 2 close to the resilient strip 20, the connecting groove 18 is matched with the connecting block 19, the connecting groove 18 is disposed on one side of the sliding groove 21 close to the probe 5, and the shortest distance between the connecting groove 18 and the sliding groove 21 is smaller than the difference between the lengths of the detection needle 6 and the probe;

when an operator pushes the moving block 22 to move towards the direction close to the probe 5, the elastic strip 20 moves simultaneously, when the connecting block 19 moves to the position aligned with the connecting groove 18, under the action of the elastic force of the elastic strip 20, the connecting block 19 is clamped into the connecting groove 18, under the mutual limiting action of the connecting block 19 and the connecting groove 18, the fixing of the moving block 22 is realized through the elastic strip 20, and when the operator pulls down the connecting block 19 to the outside of the connecting groove 18, the moving block 22 can reset.

Preferably, in order to improve the safety of the multimeter, the lead screw 3 and the meter pen 2 are made of insulating materials;

through insulating material, the probability of the conduction of the detection needle 6 and the probe 5 with a human body is reduced, the probability of electric leakage of the universal meter is reduced, and the safety of the universal meter is improved.

Preferably, in order to prolong the service life of the probe 5, the probe 5 is coated with an anti-corrosion coating;

the corrosion speed of the probe 5 is slowed down through the anti-corrosion coating, and the service life of the probe 5 is prolonged.

Preferably, in order to improve the dustproof performance of the sliding groove 21, sealing strips are arranged on the inner walls of the two sides of the sliding groove 21, and the sides, close to each other, of the two sealing strips are abutted against each other;

the sliding groove 21 is sealed through the sealing strip, and the probability that dust enters the inside of the meter pen 2 through the sliding groove 21 is reduced.

Preferably, in order to reduce the wear of the screw rod 3, the screw rod 3 is coated with grease;

the friction force between the screw rod 3 and the ball screw bearing 12 is reduced by the lubricating grease, and the abrasion of the screw rod 3 is reduced.

Preferably, in order to reduce the probability of the sliding of the moving block 22, the moving block 22 is provided with anti-sliding stripes;

the friction force between the moving block 22 and the fingers of the operator is increased through the anti-slip threads, and the probability of slipping of the moving block 22 is reduced.

When dense pins need to be detected, an operator manually pushes the moving block 22 to move towards the direction close to the probe 5, the moving block 22 is fixed through the positioning assembly, the lead screw 3 is driven by the moving block 22 to move towards the direction close to the probe 5 under the transmission action of the connecting rod 23, the detection needle 6 is pushed by the lead screw 3 to move to the outside of the probe 5 along the probe 5, the detection needle 6 can accurately detect the dense pins due to the small diameter of the detection needle 6, the probability of false touch is reduced, when the lead screw 3 moves, the lead screw 3 drives the inner ring of the ball screw bearing 12 to rotate, the second gear 17 rotates, the first gear 11 is driven to rotate by the second gear 17, the driving shaft 16 is driven to rotate by the first gear 11 under the connection action of the one-way bearing 10, the generator 13 is driven to operate by the driving shaft 16, when the screw rod 3 moves reversely, the first gear 11 is separated from the driving shaft 16 through the one-way bearing 10, and the driving shaft 16 can continuously rotate through the inertia effect of the inertia wheel 15, so that the generating capacity of the generator 13 is improved, and the endurance time of the multimeter is prolonged.

Compared with the prior art, in this energy-saving universal meter with prevent mistake and touch function, realized the flexible of detection needle 6 through detection mechanism, make the universal meter can comparatively intensive pin of accurate measurement, the practicality of universal meter has been improved, compare with current detection mechanism, this detection mechanism is when realizing detecting that needle 6 receive and releases, can also clean detection needle 6, the life of detection needle 6 has been prolonged, moreover, can convert the kinetic energy of lead screw 3 into the electric energy through power generation mechanism, later use the universal meter with the electric energy supply, the time of endurance of universal meter has been prolonged, compare with current power generation mechanism, this power generation mechanism is at the in-process of lead screw 3 reciprocating motion, can be with the whole conversions of the kinetic energy that lead screw 3 reciprocating motion produced through two power generation subassemblies, the efficiency of energy conversion has been improved.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.