CN115078835A

CN115078835A - Measuring device for measuring minimum resistance

Info

Publication number: CN115078835A
Application number: CN202210658520.6A
Authority: CN
Inventors: 王同宝; 王一众
Original assignee: Changzhou Zhixin Precision Electronics Co ltd
Current assignee: Changzhou Zhixin Precision Electronics Co ltd
Priority date: 2022-06-11
Filing date: 2022-06-11
Publication date: 2022-09-20

Abstract

The invention relates to a resistance measuring device, in particular to a measuring device for measuring an extremely small resistance. The utility model provides a measuring device for measure minimum resistance, includes adapter and measuring pen, has cable one to connect between adapter and the measuring pen, and the adapter docks with measuring equipment, and the measuring pen includes a shell, and the tip of a shell is laid the head for the thimble, and the thimble is laid the overhead thimble of two activities of inserting, and the spring is installed to the tip inboard and the thimble of thimble between laying the head, has the clearance between two thimbles. The measuring device for measuring the minimum resistance has the advantages that the structural size of the end part of the measuring pen for measuring can meet the requirement of positioning and measuring the chip resistor or other small-sized devices, and the measuring accuracy is ensured by determining the measuring data through four measuring lines.

Description

Measuring device for measuring minimum resistance

Technical Field

The invention relates to a resistance measuring device, in particular to a measuring device for measuring an extremely small resistance.

Background

Common electrical elements in electronic equipment need to measure resistance, some chip resistors are small in size and extremely small in resistance, precision of a conventional universal meter cannot be guaranteed during measurement, a pen point of the universal meter is large, accurate positioning cannot be achieved for measurement of the chip resistors, and measurement precision is low.

In view of the above-mentioned drawbacks, the present inventors have made active research and innovation to create a measuring device for measuring an extremely small resistance, which is more industrially valuable.

Disclosure of Invention

To solve the above technical problems, it is an object of the present invention to provide a measuring device for measuring an extremely small resistance.

The invention discloses a measuring device for measuring an extremely-small resistance, which comprises an adapter and a measuring pen, wherein a first cable is connected between the adapter and the measuring pen, the adapter is in butt joint with measuring equipment, the measuring pen comprises a pen shell, the end part of the pen shell is a thimble placing head, two movable thimbles are inserted into the thimble placing head, a spring is arranged between the inner side of the end part of each thimble and the thimble placing head, and a gap is formed between the two thimbles.

The measuring pen is in contact with two ends of a resistor to be measured through a thin thimble structure, two thimbles are arranged on the two measuring pens respectively to form a measuring loop with four needles, and the end parts of the measuring pens are in contact with the resistor, so that the requirement of accurate measurement is met.

Furthermore, a thimble sliding seat with two parallel holes is arranged in the middle of the thimble placing head, a thimble is inserted into the thimble sliding seat, the end part of the thimble is a contact head, the end part of the contact head is in a triangular shape, and the gap between the contact heads is 0.2 mm.

The thimble placing head is internally provided with a support which can slide by the thimble, when the contact head is contacted with a device to be measured, the thimble slides on the support in a pressing mode, and then the spring provides reverse elastic force, so that good contact effect between contacted electronic devices is ensured, and the measurement precision is ensured.

Furthermore, a contact sleeve is sleeved on the contact head, two through grooves are formed in the middle of the contact sleeve, and the contact sleeve is fixed on the contact head outside the contact sleeve in a locking screw and screw hole mode.

Separate two contact heads through the contact cover, the contact cover is insulating material, guarantees the clearance between the two when playing spacing effect for satisfy the demand of measuring.

Furthermore, a thimble sleeve is installed on the inner side of the pen shell, the tail end of the thimble extends into the thimble sleeve, a second cable is arranged at the tail end of the thimble sleeve and is connected with a plug installed at the tail end of the pen shell, and the second cable is connected with the first cable.

The pen shell is internally provided with an ejector pin sleeve used for sliding the ejector pin, the end part of the ejector pin slides in the ejector pin sleeve, a position convenient for the ejector pin to shrink is arranged, and the contact head at the end part of the ejector pin is ensured to be stably contacted with the resistor by matching with the spring.

Furthermore, the tail end of the adapter is provided with four connectors, each connector penetrates through the adapter through a cable III to be connected with a cable I, and each cable III is connected with two cables respectively.

All there are two thimbles in each measuring pen, and each thimble communicates through cable two and the cable one of being connected the adapter, just can draw forth four cables that link together with cable three on two measuring pens like this to finally be connected with the joint on four cables, four joints are respectively:

hcur current drives the high side;

lcur current drives the low side;

hpot voltage sampling high end;

the Lpot voltage sampling low end;

the four joints are butted by interfaces of measuring equipment, the resistance value of the resistor is finally measured through current-voltage conversion, and the measuring precision is high.

Furthermore, two grounding connectors are installed inside the adapter, and each grounding connector is connected with the corresponding measuring pen through a cable IV.

In order to ensure the measuring precision, the adapter is also provided with a grounding connector which is connected with a corresponding measuring pen by matching with the cable IV.

By the scheme, the invention at least has the following advantages: the measuring device for measuring the minimum resistance has the advantages that the structural size of the end part of the measuring pen for measuring can meet the requirement of positioning and measuring the chip resistor or other small-sized devices, and the measuring accuracy is ensured by determining the measuring data through four measuring lines.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate a certain embodiment of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the measuring pen of the present invention;

FIG. 3 is a schematic structural view of a thimble mounting head according to the present invention;

FIG. 4 is a front view of FIG. 3 of the present invention;

FIG. 5 is a cross-sectional view of FIG. 4 of the present invention;

FIG. 6 is a schematic view of the present invention with the outer housing removed from FIG. 3;

FIG. 7 is a structural schematic of the contact sleeve of the present invention;

FIG. 8 is a schematic view of the stylus of the present invention with the outer case removed;

figure 9 is a schematic view of the internal structure of the adapter of the present invention;

in the figure, the connector 1, the adapter 2, the measuring pen 3, the cable I, the cable 4, the pen shell 5, the thimble placing head 6, the thimble 7, the spring 8, the thimble sliding seat 9, the contact head 10, the contact sleeve 11, the cable II, the cable 12, the plug 13, the connector 14, the cable III, the cable 15, the grounding connector 16, the cable IV, the cable 17 and the thimble sleeve.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Referring to fig. 1-3, the measuring device comprises two identical measuring pens 2, a first cable 3 is connected between the measuring pens 2 and the adapter 1, three wire harnesses are arranged in the first cable 3, two wire harnesses are connected with two thimbles 6 of the same structure in the measuring pens 2, the thimbles 6 slide back and forth in a right thimble placing head 5, and the assembled springs 7 provide reverse elasticity for the thimbles 6, so that the ends of the thimbles 6 are tightly attached to measuring resistors by the elasticity of the springs 7 during measurement, a small gap is formed between the two thimbles 6, the two thimbles 6 cannot be attached to each other, and the resistors are calculated and measured by inputting and outputting two paths of current and voltage during measurement, so that the measurement precision is ensured.

Referring to fig. 3-6, a thimble sliding seat 8 for sliding of the thimble 6 is arranged in the thimble placing head 5, the thimble 6 slides in a groove in the thimble sliding seat 8, when the contact 9 at the end of the thimble 6 contacts with the resistor to be tested, the contact 9 contacts with the resistor to be tested in a manner of pressing by hand, the spring 7 provides elasticity to ensure good contact between the contact 9 and the resistor to be tested, the end of the contact 9 is tapered, and the long ends between the two contacts 9 are parallel to each other, and a gap of 0.2mm is formed between the two contacts, so that the two contacts 9 do not contact with each other, and the condition of conduction between the two contacts is avoided.

Referring to fig. 7 and 8, in order to ensure that the contacts 9 are always in a separated state, the contacts 10 are sleeved on the contacts 9, the contact sleeve 10 is in a rectangular parallelepiped structure, a partition is arranged in the middle of the contact sleeve and used for separating the two contacts 9, and two grooves matched with the contacts 10 in size are formed for limiting the contacts 10.

Referring to fig. 8, the end of the thimble sleeve 17 is in a state of being matched with the tail of the thimble 6, so that the thimble 6 can move in the thimble sleeve 17, a certain moving distance of the thimble 6 is ensured, and the tail end of the thimble sleeve 17 is connected with a third cable 14 installed on the inner side of the adapter 1 through a second cable 11, so as to realize the communication between the detection device and the measuring pen 2.

Referring to fig. 9, four contacts 9 in two measuring pens 2 are connected with corresponding connectors 13 through cables three 14 in half, so that four groups of signals are communicated, wherein the four groups of signals are respectively an Hcur current driving high end, an Lcur current driving low end, an Hpot voltage sampling high end and an Lpot voltage sampling low end; and obtaining the resistance value of the resistor after calculation through the data of the current and the voltage.

Referring to fig. 9, in order to ensure the accuracy of the measurement, two sets of grounding connectors 15 are installed in the adapter 1, and the grounding operation can be completed after the cable four 16 is butted with the measuring pen 2.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a measuring device for measuring minimum resistance, includes adapter (1) and measuring pen (2), has cable one (3) to connect between adapter (1) and measuring pen (2), and adapter (1) docks its characterized in that with measuring equipment: the measuring pen (2) comprises a pen shell (4), the end part of the pen shell (4) is a thimble placing head (5), two movable thimbles (6) are inserted into the thimble placing head (5), a spring (7) is installed between the inner side of the end part of the thimble (6) and the thimble placing head (5), and a gap is reserved between the two thimbles (6).

2. A measuring apparatus for measuring a very small resistance as set forth in claim 1, wherein: the middle of the thimble placing head (5) is provided with a thimble sliding seat (8) with two parallel holes, a thimble (6) is inserted into the thimble sliding seat (8), the end part of the thimble (6) is a contact head (9), the end part of the contact head (9) is in a triangular shape, and the gap between the contact heads (9) is 0.2 mm.

3. A measuring apparatus for measuring an extremely small resistance according to claim 2, characterized in that: the contact head (9) is sleeved with a contact head sleeve (10), the middle part of the contact head sleeve (10) is provided with two through grooves, and the contact head sleeve (10) is fixed on the contact head (9) at the outer side of the contact head sleeve (10) in a locking screw and screw hole mode.

4. A measuring apparatus for measuring an extremely small resistance according to claim 3, characterized in that: an ejector pin sleeve (17) is installed on the inner side of the pen shell (1), the tail end of the ejector pin (6) extends into the ejector pin sleeve (17), a second cable (11) is arranged at the tail end of the ejector pin sleeve (17), the second cable (11) is connected with a plug (12) installed at the tail end of the pen shell (1), and the second cable (11) is connected with the first cable (3).

5. A measuring apparatus for measuring an extremely small resistance according to claim 4, characterized in that: the tail end of the adapter (1) is provided with four connectors (13), each connector (13) penetrates through the adapter through a cable III (14) to be connected with a cable I (3), and each cable I (3) is connected with two cables III (14) respectively.

6. A measuring apparatus for measuring an extremely small resistance according to claim 5, characterized in that: two grounding connectors (15) are installed inside the adapter (1), and each grounding connector (15) is connected with the corresponding measuring pen (2) through a cable four (16).