CN218974421U

CN218974421U - Portable test fixture capable of measuring resistivity of bars and wires

Info

Publication number: CN218974421U
Application number: CN202223315762.XU
Authority: CN
Inventors: 王心阳; 陈余宏
Original assignee: Changzhou Xinyang Electronic Technology Co ltd
Current assignee: Changzhou Xinyang Electronic Technology Co ltd
Priority date: 2022-12-10
Filing date: 2022-12-10
Publication date: 2023-05-05
Anticipated expiration: 2032-12-10

Abstract

The utility model belongs to the technical field of resistance test fixtures, in particular to a portable test fixture capable of measuring the resistivity of bars and wires, which comprises a storage box body, a storage box cover, a handle and a rotating seat; the top of the storage box body is provided with a storage box cover; the top of the storage box cover is fixedly connected with a rotating seat; the middle part of the rotating seat is rotationally connected with a handle; this step is through being equipped with sliding block, second spring and slip fixed block, can be through the mode of pressing, fix rod and wire rod that needs to be measured inside the fixing base, reduce rod and wire rod that needs to be measured in carrying out four probe sheet resistance resistivity test, the circumstances that roll and slip cause the test accuracy not enough appear, and in four probe sheet resistance resistivity test, reducible staff need pass through the manual fixed mode of screwing of screw thread, reduce staff's work load, promote work efficiency, through being equipped with the case body of depositing, deposit the case lid, handle and rotating the seat, can make this device more portable.

Description

Portable test fixture capable of measuring resistivity of bars and wires

Technical Field

The utility model belongs to the technical field of resistance test fixtures, and particularly relates to a portable test fixture capable of measuring the resistivity of bars and wires.

Background

In the development and production process of semiconductor devices, the original resistivity of semiconductor monocrystalline materials and sheet resistance after being subjected to diffusion, epitaxy and other processes are often required to be measured, and a plurality of methods for measuring the resistivity are available, such as a two-probe method, a four-probe method, a single-probe extended resistance method, a Van der Waals method and the like, and the four-probe method is convenient and feasible, is suitable for batch production and is widely applied at present.

One Chinese patent with publication number CN206848321U discloses a bar resistance test fixture, which comprises a base, wherein a rectangular through hole is processed in the center of the base, and a semicircular through hole is processed at the head of the rectangular through hole; the bases positioned on two sides of the rectangular through hole are provided with sliding grooves, and semicircular chucks are arranged on the sliding grooves in a sliding fit manner; the top of the semicircular chuck is fixedly provided with a guide device and an automatic clamping mechanism; binding posts are arranged on two side surfaces of the base, and threaded fixing holes are machined in the bottoms of the binding posts.

In the prior art, for the measurement of the resistivity of general bars and wires, direct-current double-arm bridges are mostly utilized in experiments, the resistance of the direct-current double-arm bridges is measured by adopting a four-probe method, and in long-time use observation, the existing direct-current double-arm bridge clamps are mostly clamped by adopting a screw thread screwing mode, so that the operation is complex, the time and the labor are wasted, and the direct-current double-arm bridge clamps are inconvenient to carry.

Therefore, the utility model provides the portable testing fixture capable of measuring the resistivity of the bars and the wires.

Disclosure of Invention

In order to overcome the deficiencies of the prior art, at least one technical problem presented in the background art is solved.

The technical scheme adopted for solving the technical problems is as follows: the utility model relates to a portable test fixture capable of measuring the resistivity of bars and wires, which comprises a storage box body, a storage box cover, a handle and a rotating seat; the top of the storage box body is provided with a storage box cover; the top of the storage box cover is fixedly connected with a rotating seat; the middle part of the rotating seat is rotationally connected with a handle; a fixed seat is connected in the storage box body in a sliding manner; a first spring is connected between the fixed seat and the storage box body; one end of the first spring is fixedly connected with the bottom of the fixed seat, and the other end of the first spring is fixedly connected with the bottom of the inner side wall of the storage box body; the top of the fixed seat is fixedly connected with a sliding seat; the sliding seats are symmetrically arranged on two sides of the fixed seat; a sliding block is connected inside the sliding seat in a sliding way; the bottom of the sliding block and the inside of the storage box body are connected with a second spring; the side wall of the sliding block is fixedly connected with a sliding fixed block; this step is through being equipped with sliding block, second spring and slip fixed block, can be through the mode of pressing, fix rod and wire rod that needs to be measured inside the fixing base, reduce rod and wire rod that needs to be measured in carrying out four probe sheet resistance resistivity test, the circumstances that roll and slip cause the test accuracy not enough appear, and in four probe sheet resistance resistivity test, reducible staff need pass through the manual fixed mode of screwing of screw thread, reduce staff's work load, promote work efficiency, through being equipped with the case body of depositing, deposit the case lid, handle and rotating the seat, can make this device more portable.

Preferably, the side wall of the sliding fixed block is fixedly connected with a torsion spring; the torsion springs are in a plurality of groups and are evenly distributed on two sides of the sliding fixed block; the middle part of the torsion spring is rotationally connected with a fixed plate; according to the method, the contact area between the bottom of the sliding fixed block and the surface of a product can be increased through the torsion spring and the fixed plate, the product is further fixed, and the conditions of insufficient testing precision caused by rolling and sliding in the four-probe sheet resistance resistivity test of bars and wires to be measured are further reduced.

Preferably, the middle part of the fixing seat is connected with a sliding rod in a sliding way; the sliding rods are in a plurality of groups and are distributed in parallel; the sliding rod penetrates through the fixing seat; one end of the sliding rod, which is positioned in the fixed seat, is fixedly connected with a supporting seat; a third spring is connected between the supporting seat and the fixed seat; the other end of the sliding rod is fixedly connected with a rotating shaft; the middle part of the rotating shaft is rotationally connected with a supporting plate; the step is provided with the sliding rod, the supporting seat, the rotating shaft and the supporting plate, so that the device can be self-adaptively attached to products, bars and wires with more specifications and thickness can be adapted to the device, and the application range of the device is improved.

Preferably, an elastic supporting belt is arranged in the middle of the fixing seat; the elastic supporting belt is fixedly connected with the fixing seat; through being equipped with the elastic support area, can be further self-adaptation with the laminating of product, make this device adaptable more specification and thick rod and wire rod, further promote this device's application scope.

Preferably, a connecting rope is connected between the pair of sliding fixed blocks; a pull ring is fixedly connected with the middle part of the connecting rope; the step is provided with the connecting rope and the pull ring, so that when a worker does not need to press and fix the product by the sliding fixing blocks, the worker can simultaneously pull up the pair of sliding fixing blocks by one-hand operation, and the working efficiency of the worker is further improved.

Preferably, the bottom of the sliding fixed block is fixedly connected with a sucker; through being equipped with the sucking disc, can make the laminating that slides the fixed block more inseparabler on the product surface, further reduce rod and wire rod that need measure in carrying out four probe sheet resistance resistivity test, appear rolling and slide and cause the not enough condition of test accuracy.

The beneficial effects of the utility model are as follows:

1. according to the portable test fixture capable of measuring the resistivity of the bars and the wires, the sliding block, the second spring and the sliding fixing block are arranged, the bars and the wires to be measured can be fixed in the fixing seat in a pressing mode, the condition that the test precision is insufficient due to rolling and sliding in the process of testing the four-probe sheet resistivity is reduced, in the process of testing the four-probe sheet resistivity, the fixing mode that workers need to manually screw through threads is reduced, the workload of the workers is reduced, the working efficiency is improved, and the device is more convenient to carry through the storage box body, the storage box cover, the handle and the rotating seat.

2. According to the portable test fixture capable of measuring the resistivity of the bars and the wires, the torsion springs and the fixing plates are arranged, so that the contact area between the bottoms of the sliding fixing blocks and the surfaces of products can be increased, the products are further fixed, and the conditions of insufficient test precision caused by rolling and sliding in the process of testing the resistivity of the bars and the wires with four probes to be measured are further reduced.

Drawings

The utility model is further described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a schematic diagram of the structure of the present utility model;

FIG. 3 is a cross-sectional view of the present utility model;

FIG. 4 is a side cross-sectional view of the present utility model;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

FIG. 6 is a schematic view of a sliding seat according to the present utility model;

FIG. 7 is a schematic view of the structure of the second embodiment;

in the figure: 1. a storage box; 11. a storage box cover; 12. a handle; 13. a rotating seat; 14. a first spring; 15. a fixing seat; 16. a sliding seat; 17. a sliding block; 18. a second spring; 19. a sliding fixed block; 2. a torsion spring; 21. a fixing plate; 3. a slide bar; 31. a support base; 32. a third spring; 33. a rotating shaft; 34. a support plate; 4. an elastic support belt; 5. a connecting rope; 51. a pull ring; 6. a suction cup; 7. anti-skid lines.

Detailed Description

The utility model is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

Example 1

As shown in fig. 1 to 6, a portable testing fixture for measuring resistivity of bars and wires according to an embodiment of the present utility model includes a storage box 1, a storage box cover 11, a handle 12, and a rotating base 13; the top of the storage box body 1 is provided with a storage box cover 11; the top of the storage box cover 11 is fixedly connected with a rotating seat 13; the middle part of the rotating seat 13 is rotatably connected with a handle 12; a fixed seat 15 is connected inside the storage box body 1 in a sliding manner; a first spring 14 is connected between the fixed seat 15 and the storage box body 1; one end of the first spring 14 is fixedly connected with the bottom of the fixed seat 15, and the other end of the first spring is fixedly connected with the bottom of the inner side wall of the storage box body 1; the top of the fixed seat 15 is fixedly connected with a sliding seat 16; the sliding seats 16 are symmetrically arranged on two sides of the fixed seat 15; a sliding block 17 is connected inside the sliding seat 16 in a sliding manner; the bottom of the sliding block 17 and the inside of the storage box body 1 are connected with a second spring 18; the side wall of the sliding block 17 is fixedly connected with a sliding fixed block 19; when working, when the staff will deposit case lid 11 and open, first spring 14 can promote fixing base 15 and upwards remove, and then outside depositing box 1 with fixing base 15, when the staff need carry out the resistivity measurement to rod and wire rod, through putting into fixing base 15 inside with rod and wire rod that need measure, at this moment second spring 18 can drag sliding block 17, and then make sliding block 17 drive sliding fixed block 19 and move down together, and then press down rod and wire rod that need measure, make it fixed, this step is through being equipped with sliding block 17, second spring 18 and sliding fixed block 19, can be through the mode of pressing, rod and wire rod that need measure are fixed in fixing base 15 inside, reduce rod and wire rod that need measure in carrying out the test of four probe sheet resistivity, the condition that the roll and slip caused the test accuracy not enough appears, and in the test of four probe sheet resistivity, can reduce the staff and need pass through the fixed mode of screw manual screwing, reduce staff's work load, promote work efficiency, through being equipped with and depositing box 1, deposit case lid 11, handle 12 and rotating seat 13, can make this device more portable.

The side wall of the sliding fixed block 19 is fixedly connected with a torsion spring 2; the torsion springs 2 are multiple groups and are evenly distributed on two sides of the sliding fixed block 19; the middle part of the torsion spring 2 is rotatably connected with a fixed plate 21; during operation, when the laminating of slip fixed block 19 is on the rod that needs to measure and wire rod surface, torsional spring 2 can drive fixed plate 21 and rotate, makes fixed plate 21 laminating at the product surface, and this step can increase the area of contact of slip fixed block 19 bottom and product surface through being equipped with torsional spring 2 and fixed plate 21, further fixes the product, further reduces rod that needs to measure and wire rod in carrying out four probe sheet resistivity test, appears rolling and slip and causes the condition that test accuracy is not enough.

The middle part of the fixed seat 15 is connected with a sliding rod 3 in a sliding way; the sliding rods 3 are in a plurality of groups and are distributed in parallel; the sliding rod 3 penetrates through the fixed seat 15; one end of the sliding rod 3, which is positioned in the fixed seat 15, is fixedly connected with a supporting seat 31; a third spring 32 is connected between the supporting seat 31 and the fixed seat 15; the other end of the sliding rod 3 is fixedly connected with a rotating shaft 33; the middle part of the rotating shaft 33 is rotatably connected with a supporting plate 34; during operation, after the staff put into fixing base 15 inside with the product, backup pad 34 can rotate along pivot 33, and then laminate with the product surface, and third spring 32 can pull supporting seat 31, and then adjust the length of slide bar 3 outside fixing base 15, this step is through being equipped with slide bar 3, supporting seat 31, pivot 33 and backup pad 34, can be self-adaptation laminate with the product, make the applicable more specifications of this device and thick rod and wire rod, promote the application scope of this device.

An elastic supporting belt 4 is arranged in the middle of the fixed seat 15; the elastic supporting belt 4 is fixedly connected with the fixed seat 15; during operation, through being equipped with elastic support area 4, can be further self-adaptation with the laminating of product, make the applicable more specifications of this device and thick rod and wire rod, further promote the application scope of this device.

A connecting rope 5 is connected between the pair of sliding fixed blocks 19; a pull ring 51 is fixedly connected with the middle part of the connecting rope 5; during operation, when the staff needs to take out the product from fixing base 15 inside, through upwards pulling pull ring 51, pull ring 51 can drive connecting rope 5 this moment, pull simultaneously a pair of slip fixed block 19, make slip fixed block 19 upwards remove, leave the product surface, and then the staff can take out the product from fixing base 15 inside, this step is through being equipped with connecting rope 5 and pull ring 51, can make the staff need not slip fixed block 19 press the fixed time to the product, can make the staff one-hand operation just can pull up a pair of slip fixed block 19 simultaneously, and then promote staff's work efficiency.

The bottom of the sliding fixed block 19 is fixedly connected with a sucker 6; during operation, through being equipped with sucking disc 6, can make the laminating of slip fixed block 19 more inseparabler on the product surface, further reduce rod and wire rod that need measure in carrying out four probe sheet resistance resistivity test, appear rolling and slip and cause the condition that the test accuracy is not enough.

Example two

As shown in fig. 7, in comparative example one, another embodiment of the present utility model is: the middle part of the handle 12 is fixedly connected with an anti-skid pattern 7; the skid resistant patterns 7 are multiple groups and are uniformly distributed; during operation, through being equipped with anti-skidding line 7 at handle 12 middle part, can increase frictional force when the user grips handle 12, frictional force when this step can promote handle 12 and staff's hand contact reduces the possibility that the staff skidded when using this device.

During operation, when the staff will deposit case lid 11 and open, first spring 14 can promote fixing base 15 and upwards remove, and then outside depositing box 1 with fixing base 15, when the staff need carry out resistivity measurement to rod and wire rod, through putting into fixing base 15 inside with rod and wire rod that need measure, this moment second spring 18 can drag sliding block 17, and then make sliding block 17 drive sliding fixed block 19 and move down together, and then press down to rod and wire rod that need measure, make it fixed, after sliding fixed block 19 laminating is at rod and wire rod surface that need measure, torsional spring 2 can drive fixed plate 21 and rotate, make fixed plate 21 laminating at the product surface, after the staff put into fixing base 15 with the product, backup pad 34 can rotate along pivot 33, and then laminate with the product surface, and third spring 32 can drag supporting seat 31, and then adjust the length of sliding rod 3 outside fixing base 15, when the staff need take out the product from fixing base 15 inside, through upwards pulling 51, this moment 51 can drive connecting rope 5, pull ring 19 simultaneously to a pair of sliding fixed block 19 makes sliding block 19 laminate at the product surface, and then take out the product from the fixing base 15, can be followed by the staff and take out the product from the fixing base.

The front, rear, left, right, up and down are all based on fig. 1 in the drawings of the specification, the face of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on, according to the viewing angle of the person.

In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present utility model.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A portable test fixture capable of measuring the resistivity of bars and wires comprises a storage box body (1), a storage box cover (11), a handle (12) and a rotating seat (13); a storage box cover (11) is arranged at the top of the storage box body (1); a rotating seat (13) is fixedly connected to the top of the storage box cover (11); the middle part of the rotating seat (13) is rotationally connected with a handle (12); the method is characterized in that: a fixed seat (15) is connected in the storage box body (1) in a sliding manner; a first spring (14) is connected between the fixed seat (15) and the storage box body (1); one end of the first spring (14) is fixedly connected with the bottom of the fixed seat (15), and the other end of the first spring is fixedly connected with the bottom of the inner side wall of the storage box body (1); a sliding seat (16) is fixedly connected at the top of the fixed seat (15); the sliding seats (16) are symmetrically arranged at two sides of the fixed seat (15); a sliding block (17) is connected inside the sliding seat (16) in a sliding way; the bottom of the sliding block (17) and the inside of the storage box body (1) are connected with a second spring (18); the side wall of the sliding block (17) is fixedly connected with a sliding fixed block (19).

2. The portable, measurable rod and wire resistivity test fixture of claim 1, wherein: the side wall of the sliding fixed block (19) is fixedly connected with a torsion spring (2); the torsion springs (2) are multiple groups and are evenly distributed on two sides of the sliding fixed block (19); the middle part of the torsion spring (2) is rotationally connected with a fixed plate (21).

3. The portable, measurable rod and wire resistivity test fixture of claim 2, wherein: the middle part of the fixed seat (15) is connected with a sliding rod (3) in a sliding way; the sliding rods (3) are in a plurality of groups and are distributed in parallel; the sliding rod (3) penetrates through the fixed seat (15); one end of the sliding rod (3) positioned in the fixed seat (15) is fixedly connected with a supporting seat (31); a third spring (32) is connected between the supporting seat (31) and the fixed seat (15); the other end of the sliding rod (3) is fixedly connected with a rotating shaft (33); the middle part of the rotating shaft (33) is rotatably connected with a supporting plate (34).

4. A portable, measurable rod and wire resistivity test fixture according to claim 3, wherein: an elastic supporting belt (4) is arranged in the middle of the fixed seat (15); the elastic supporting belt (4) is fixedly connected with the fixing seat (15).

5. The portable, measurable rod and wire resistivity test fixture of claim 4, wherein: a connecting rope (5) is connected between the pair of sliding fixed blocks (19); a pull ring (51) is fixedly connected to the middle of the connecting rope (5).

6. The portable, measurable rod and wire resistivity test fixture of claim 5, wherein: the bottom of the sliding fixed block (19) is fixedly connected with a sucker (6).