CN219590462U

CN219590462U - Four-wire tester

Info

Publication number: CN219590462U
Application number: CN202320339340.1U
Authority: CN
Inventors: 林咏华; 沈炳元
Original assignee: Shenzhen Kaima Times Technology Co ltd
Current assignee: Shenzhen Kaima Times Technology Co ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-08-25
Anticipated expiration: 2033-02-16

Abstract

The utility model relates to a four-wire testing machine which comprises a frame, a lifting mechanism, an electronic mechanism, a fine adjustment mechanism, a jig mounting mechanism and a testing jig. The elevating system sets up in the frame, and the output shaft that rises a plurality of lift lead screws all is connected with the lower surface of backup pad. The electronic mechanism is arranged on the supporting plate, and a plurality of mounting grooves are formed above the electronic mechanism. The fine adjustment mechanism is used for adjusting the position of the electronic mechanism. The support frame of the jig mounting mechanism is erected above the electronic mechanism. The dial sets up on the support frame, is provided with a ox horn dish in every mounting groove, and the ox horn dish all is located the dial under. The multiple connecting wires are used for connecting the dial and the multiple ox horn plates, so that the length of the connecting wires can be effectively reduced, and meanwhile, the size of the jig is reduced. Because the length of the connecting wire is reduced, the interference to signals in the test is correspondingly reduced, the internal resistance in the test system is correspondingly reduced, and the test precision is obviously improved.

Description

Four-wire tester

Technical Field

The utility model relates to the field of testing equipment of circuit boards, in particular to a four-wire testing machine.

Background

The general four-wire test fixture consists of a needle disc, connecting wires and a fixture ox horn disc, wherein test probes in the needle disc are connected with the fixture ox horn disc through the connecting wires, so that needles on the fixture ox horn disc are conducted with needles on the needle disc in a one-to-one correspondence manner, and meanwhile, the fixture ox horn disc is installed at the rear part of the needle disc. Because the fixture ox horn disc is installed at the rear part of the fixture, the volume of the fixture is increased, meanwhile, the connecting wire of the fixture ox horn disc is correspondingly lengthened, the signal is interfered to be increased in the testing process due to the lengthening of the connecting wire, meanwhile, the internal resistance of the testing system is also increased, and the testing precision is lower.

It is desirable to provide a four-wire tester to solve the above-mentioned problems.

Disclosure of Invention

The utility model relates to a four-wire testing machine, which is characterized in that a plurality of lifting screw rods are used for lifting operation, a testing jig is arranged above an electronic mechanism, and a ox horn disc is arranged right below the needle disc, so that the length of a connecting wire can be effectively reduced, and the size of the jig is reduced. Because the length of connecting wire reduces, the interference that the signal received in the test also reduces correspondingly, and the inside internal resistance of test system also reduces correspondingly, is showing and is improving the test accuracy, thereby has solved the problem that the fixture ox horn dish installs in the tool rear portion and thereby has increased the volume of tool and the length of connecting wire leads to the test accuracy lower among the prior art.

In order to solve the problems, the utility model comprises the following steps: a four-wire tester, comprising:

a frame;

the lifting mechanism is arranged on the frame and comprises a plurality of lifting screw rods and a supporting plate, and output shafts of the lifting screw rods are connected with the lower surface of the supporting plate;

the electronic mechanism is arranged on the supporting plate, and a plurality of mounting grooves are formed above the electronic mechanism;

the fine tuning mechanism is connected with the electronic mechanism and used for adjusting the position of the electronic mechanism;

the jig mounting mechanism is arranged above the fine adjustment mechanism and the electronic mechanism and comprises a support frame which is erected above the electronic mechanism; the method comprises the steps of,

the test jig comprises a needle disc, a plurality of connecting lines and a plurality of ox horn discs, wherein the needle disc is arranged on the support frame, one ox horn disc is arranged in each mounting groove, and the ox horn discs are all positioned under the needle disc; the plurality of connecting lines are used for connecting the dial and the plurality of ox horn discs.

Furthermore, the lifting screw rods are provided with four groups, the four groups of lifting screw rods are uniformly distributed below the supporting plate at intervals, and the running stability of the lifting mechanism is improved.

Further, the backup pad sets up to square structure, every angle of backup pad all corresponds and is provided with a set of lift lead screw, and is distributed evenly, and the motion is stable.

Further, the four groups of lifting screw rods enclose the synthesized area, the electronic mechanism, the fine adjustment mechanism and the center of the jig installation mechanism are positioned on the same vertical line, so that the center of the lifting mechanism is overlapped with the center of gravity of the whole load, the movement is stable, and the position accuracy of the movement is high.

Further, the electronic mechanism further comprises two isolation boxes and six test bodies, and the two isolation boxes are arranged side by side in parallel. The upper end and the lower extreme of insulation box all open the setting, be provided with three holding tank in the insulation box, every place in the holding tank one the test body, every the top of test body has placed one ox horn dish. External interference can be reduced during testing, and detection accuracy is improved.

Further, the periphery annular of the upper end of isolation case is provided with the connecting plate, the connecting plate corresponds two the isolation case is provided with two spread grooves that link up, the isolation case passes corresponding the spread groove, the connecting plate with the periphery welded connection of isolation case improves two the stability of the connection of isolation case to improve the precision of test.

Further, two the lower extreme of insulation can is connected through U type connecting seat, U type connecting seat is two just welded connection between the insulation can, simple structure practices thrift the cost.

Further, a plurality of screw holes are formed in two side edges of the connecting plate. The electronic mechanism further comprises a cover plate, and the cover plate is provided with a through mounting groove corresponding to the test body. The thickness of apron is greater than the thickness of connecting plate, the apron pass through the screw with screw hole threaded connection on the connecting plate, it is convenient to install and remove, improves the efficiency of equipment.

Further, through grooves are formed in the supporting plate, the two isolation boxes penetrate through the through grooves and are arranged on the frame, occupied space is reduced, and cost is lowered.

Further, two positioning columns are arranged on the test body, and the two positioning columns are diagonally arranged at the upper end of the test body. The ox horn disc is correspondingly provided with two positioning holes, and the positioning columns penetrate through the positioning holes, so that the assembly efficiency is improved, and the test precision is improved.

Compared with the prior art, the four-wire tester has the beneficial effects that: the utility model relates to a four-wire testing machine which comprises a frame, a lifting mechanism, an electronic mechanism, a fine adjustment mechanism, a jig mounting mechanism and a testing jig. The lifting mechanism is arranged on the frame and comprises a plurality of lifting screw rods and a supporting plate, and output shafts of the lifting screw rods are connected with the lower surface of the supporting plate. The electronic mechanism is arranged on the supporting plate, and a plurality of mounting grooves are formed above the electronic mechanism. The fine adjustment mechanism is connected with the electronic mechanism and used for adjusting the position of the electronic mechanism. The jig mounting mechanism is arranged above the fine adjustment mechanism and the electronic mechanism and comprises a supporting frame, and the supporting frame is erected above the electronic mechanism. The test fixture comprises a dial, a plurality of connecting wires and a plurality of ox horn discs. The dial sets up on the support frame, is provided with a ox horn dish in every mounting groove, and the ox horn dish all is located the dial under. The plurality of connecting wires are used for connecting the dial and the plurality of ox horn discs. This four-wire testing machine goes up and down the operation through using a plurality of lift lead screws, and test fixture sets up in electronic mechanism's top, ox horn disc all is located under the dial, can effectually reduce the length of connecting wire, reduce the volume of tool simultaneously. Because the length of connecting wire reduces, the interference that the signal received in the test also reduces correspondingly, and the inside internal resistance of test system also reduces correspondingly, is showing and is improving the test accuracy, thereby has solved the problem that the fixture ox horn dish installs in the tool rear portion and thereby has increased the volume of tool and the length of connecting wire leads to the test accuracy lower among the prior art.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments are briefly described below, and the drawings in the following description are only drawings corresponding to some embodiments of the present utility model.

Fig. 1 is a front view of an embodiment of a four-wire tester of the present utility model.

FIG. 2 is a side view of one embodiment of a four-wire tester of the present utility model.

FIG. 3 is a top view of an embodiment of the lift mechanism of the four-wire tester of the present utility model.

FIG. 4 is a top view of an embodiment of the electronic mechanism of the four-wire tester of the present utility model.

Fig. 5 is a schematic structural view of an embodiment of an electronic mechanism of a four-wire tester according to the present utility model.

FIG. 6 is a schematic diagram of an embodiment of an isolation box of a four-wire tester according to the present utility model.

Fig. 7 is a schematic structural diagram of an embodiment of a test body of the four-wire tester according to the present utility model.

FIG. 8 is a top view of an embodiment of the isolation box of the four-wire tester of the present utility model.

Fig. 9 is a front view of an embodiment of a testing jig of a four-wire tester according to the present utility model.

In the figure: 10. four-wire tester, 20, frame, 30, lifting mechanism, 31, lifting screw, 32, support plate, 40, electronics, 41, isolation box, 411, receiving slot, 42, connecting plate, 43, cover plate, 44, test body, 45, U-shaped connecting seat, 46, positioning post, 50, fine adjustment mechanism, 60, jig mounting mechanism, 61, support frame, 70, test jig, 71, needle dial, 72, probe, 73, connecting wire, 74, ox horn disc.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms of directions used in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are used for explaining and understanding the present utility model only with reference to the orientation of the drawings, and are not intended to limit the present utility model.

In the drawings, like structural elements are denoted by like reference numerals.

Referring to fig. 1, 2 and 3, in the present embodiment, the four-wire tester 10 includes a frame 20, a lifting mechanism 30, an electronic mechanism 40, a fine adjustment mechanism 50, a jig mounting mechanism 60 and a testing jig 70. The lifting mechanism 30 is arranged on the frame 20, the centers of the electronic mechanism 40, the fine adjustment mechanism 50, the jig mounting mechanism 60 and the test jig 70 are mounted on the center of the lifting mechanism 30, so that the center of the lifting mechanism 30 coincides with the center of gravity of the whole load, the movement is stable, and the position accuracy of the movement is high.

In the present embodiment, referring to fig. 1 and 3, the lifting mechanism 30 includes a plurality of lifting screws 31 and a supporting plate 32. The output shafts of the plurality of elevating screw rods 31 are connected to the lower surface of the support plate 32. Wherein, the lifting screw rods 31 are provided with four groups, and the four groups of lifting screw rods 31 are uniformly distributed below the supporting plate 32 at intervals, so that the running stability of the lifting mechanism 30 is improved. The backup pad 32 sets up to square structure, and every angle of backup pad 32 all corresponds to be provided with a set of lift lead screw 31, and the distribution is even, and the motion is stable.

The centers of the four groups of lifting screw rods 31, the electronic mechanism 40, the fine adjustment mechanism 50 and the jig mounting mechanism 60 are positioned on the same vertical line, so that the center of the lifting mechanism 30 is overlapped with the center of gravity of the whole load, the movement is stable, and the position accuracy of the movement is high.

The lifting mechanism 30 is simultaneously pushed by four lifting screw rods 31, the four lifting screw rods 31 are arranged in a rectangular shape, and the fine adjustment mechanism 50, the jig mounting mechanism 60, the test jig 70 and the electronic module are driven to realize lifting movement. The electronic test module is installed at the center of the fine adjustment mechanism 50, the jig installation mechanism 60 is installed at both sides of the fine adjustment mechanism 50, and the test jig 70 is installed right above the fine adjustment mechanism 50 and the electronic module. The centers of the electronic mechanism 40, the fine adjustment mechanism 50, the jig mounting mechanism 60 and the test jig 70 are overlapped with the centers of the four lifting screw rods 31, the center of the lifting mechanism 30 is overlapped with the center of gravity of the whole load, the movement is stable, and the position accuracy of the movement is high.

In the present embodiment, referring to fig. 4 and 5, the electronic mechanism 40 is disposed on the supporting plate 32, and the electronic mechanism 40 further includes two isolation boxes 41, a connecting plate 42, a cover plate 43 and six test bodies 44. Referring to fig. 6 and 7, the supporting plate 32 is provided with a through slot, and two isolation boxes 41 are disposed on the frame 20 through the through slot, so that the occupied space is reduced and the cost is reduced. The two isolation boxes 41 are arranged side by side in parallel. The upper end and the lower end of the isolation box 41 are all open, three accommodating grooves 411 are arranged in the isolation box 41, a test body 44 is arranged in each accommodating groove 411, and a ox horn disc 74 is arranged above each test body 44. External interference can be reduced during testing, and detection accuracy is improved.

Referring to fig. 6 and 8, a connecting plate 42 is annularly disposed on the outer periphery of the upper end of the isolation box 41, two through connecting grooves are disposed on the connecting plate 42 corresponding to the two isolation boxes 41, the isolation boxes 41 pass through the corresponding connecting grooves, and the connecting plate 42 is welded to the outer periphery of the isolation boxes 41, so that the stability of connection of the two isolation boxes 41 is improved, and the testing precision is improved. The welding mode can adopt double-sided electric welding, and the connection is firmer. The lower ends of the two isolation boxes 41 are connected through the U-shaped connecting seat 45, the U-shaped connecting seat 45 is positioned between the two isolation boxes 41 and is welded and connected, the structure is simple, and the cost is saved.

A plurality of screw holes are formed on both sides of the connection plate 42. The cover plate 43 is provided with a through mounting groove corresponding to the test body 44. The thickness of the cover plate 43 is greater than that of the connecting plate 42, the cover plate 43 is in threaded connection with screw holes in the connecting plate 42 through screws, the assembly and disassembly are convenient, and the assembly efficiency is improved.

Referring to fig. 7, two positioning posts 46 are disposed on the test body 44, and the two positioning posts 46 are diagonally disposed on the upper end of the test body 44. The ox horn disc 74 is correspondingly provided with two positioning holes, and the positioning columns 46 penetrate through the positioning holes, so that the assembly efficiency is improved, and the testing precision is improved.

The fine adjustment mechanism 50 is disposed on the support plate 32 and connected to the electronic mechanism 40 for adjusting the position of the electronic mechanism 40. The jig mounting mechanism 60 is disposed above the fine adjustment mechanism 50 and the electronic mechanism 40. The jig mounting mechanism 60 includes a support frame 61, and the support frame 61 is mounted above the electronic mechanism 40.

Referring to fig. 9, the test fixture 70 includes a dial 71, a plurality of connecting wires 73 and a plurality of ox horn plates 74. The dial 71 is arranged on the support frame 61, and the probes 72 on the dial 71 are vertically arranged. One ox horn disc 74 is provided in each mounting slot, and the ox horn disc 74 is located directly below the needle disc 71. The plurality of connection lines 73 are used to connect the probes 72 on the dial 71 with the plurality of ox horn discs 74. The ox horn disc 74 is mounted directly below the needle disc 71, reducing the connection 73 between the probes 72 in the needle disc 71 and the jig ox horn disc 74.

The ox horn disc 74 is mounted directly under the needle disc 71, so that the length of the connecting wire 73 can be reduced, and the size of the jig can be reduced. Because the length of the connecting wire 73 is reduced, the interference to signals in the test is reduced correspondingly, and the internal resistance in the test system is reduced correspondingly, so that the tested resistance is closer to the actual resistance of the circuit board, the test precision is improved, and the test precision is improved.

In summary, although the present utility model has been described in terms of the preferred embodiments, the above-mentioned embodiments are not intended to limit the utility model, and those skilled in the art can make various modifications and alterations without departing from the spirit and scope of the utility model, so that the scope of the utility model is defined by the appended claims.

Claims

1. A four-wire tester, comprising:

a frame;

2. The four-wire tester according to claim 1, wherein the elevating screw is provided with four groups, and four groups of the elevating screw are uniformly arranged below the supporting plate at intervals.

3. The four-wire tester according to claim 2, wherein the support plate is provided in a square structure, and each corner of the support plate is provided with a set of the lifting screw.

4. A four-wire tester according to claim 3, wherein the centers of the four groups of the region surrounded by the elevating screw, the electronic mechanism, the fine adjustment mechanism, and the jig mounting mechanism are located on the same vertical line.

5. The four-wire tester according to claim 1, wherein the electronic mechanism further comprises two isolation boxes and six test bodies, the two isolation boxes being arranged side by side in parallel; the upper end and the lower extreme of insulation box all open the setting, be provided with three holding tank in the insulation box, every place in the holding tank one the test body, every the top of test body has placed one ox horn dish.

6. The four-wire tester according to claim 5, wherein a connecting plate is provided on an outer periphery of an upper end of the isolation box in a ring shape, two through connecting grooves are provided in correspondence with two of the isolation boxes, the isolation boxes pass through the corresponding connecting grooves, and the connecting plate is welded to an outer periphery of the isolation box.

7. The four-wire tester according to claim 6, wherein lower ends of the two isolation boxes are connected by a U-shaped connection seat, which is located between the two isolation boxes and is welded.

8. The four-wire tester according to claim 6, wherein a plurality of screw holes are formed in both side edges of the connecting plate, and the electronic mechanism further comprises a cover plate, and the cover plate is provided with a through mounting groove corresponding to the test body; the thickness of the cover plate is larger than that of the connecting plate, and the cover plate is in threaded connection with the screw hole on the connecting plate through a screw.

9. The four-wire tester according to claim 5, wherein the support plate is provided with a through slot, and both of the isolation boxes are disposed on the frame through the through slot.

10. The four-wire tester according to claim 5, wherein two positioning columns are provided on the test body, and two positioning columns are diagonally provided at the upper end of the test body; the ox horn disc is correspondingly provided with two positioning holes, and the positioning columns penetrate through the positioning holes.