CN217787235U - True four-wire test needle die - Google Patents

Abstract

The utility model provides a real four-wire test needle mould, which comprises a needle mould module for bearing a product to be tested and a plurality of groups of probe modules which are arranged in the needle mould module and can be contacted with the product to be tested, wherein the probe modules are arranged in a one-to-one correspondence with test contacts; the probe module comprises two long probes and two needle sleeve lines; the needle die set comprises a first needle die, a second needle die, a needle die interlayer, a third needle die, a fourth needle die and a fifth needle die which are sequentially overlapped from top to bottom. The utility model provides a pair of real four-wire test needle mould's beneficial effect lies in: the flexible circuit board testing device has the advantages that the needle die modules and the probe modules are arranged, two long probes are arranged in each probe module, the two long probes can be pricked on the testing contact with the width of 240um, true four-line testing of the flexible circuit board is completed, the flexible circuit board testing device is particularly suitable for being used in resistance testing of the flexible circuit board with small resistance value, testing accuracy is improved, contact pressure can be controlled, and indentation cannot be generated on the testing contact.

Description

True four-wire test needle die

Technical Field

The utility model belongs to the technical field of flexible circuit board processing test technique and specifically relates to a real four-wire test needle mould is related to.

Background

With the continuous development of technology, more and more intelligent electronic products are produced. Intelligent electronic products are also increasingly adopting flexible circuit boards as core components inside the intelligent electronic products. In the test of the flexible circuit board, the resistance value of the resistor in the flexible circuit board or the resistance value of the circuit of the flexible circuit board needs to be tested. At present, resistance values are generally tested on a gold-plated surface of a B2B connector with a tiny width by binding a probe to perform a two-wire test or a pseudo four-wire test. However, when the flexible circuit board is designed, the resistance of the resistor is smaller and smaller, the accuracy of the resistance of the existing two-wire test or the pseudo four-wire test cannot meet the test requirement of the existing flexible circuit board, and the true four-wire test is required to be adopted so as to reduce the influence of the probe and the test circuit on the resistance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the resistance value when current flexible circuit board design and be more and more littleer, traditional two line tests or the shortcoming that the false four-wire test can't satisfy its required precision of testing the resistance value provides a true four-wire test needle mould.

The utility model provides a technical scheme that its technical problem adopted is: a real four-wire test needle die comprises a needle die module for bearing a product to be tested and a plurality of groups of probe modules which are arranged in the needle die module and can be contacted with the product to be tested, wherein a connector is arranged on the product to be tested, a plurality of test contacts are arranged on the connector, and the probe modules and the test contacts are arranged in a one-to-one correspondence manner; the probe module comprises two long probes capable of simultaneously contacting the same test contact and two needle sleeve lines respectively electrically connected with the long probes; the needle die module comprises a first needle die, a second needle die, a needle die interlayer, a third needle die, a fourth needle die and a fifth needle die which are sequentially overlapped from top to bottom, a product to be detected is placed on the top surface of the first needle die, and a first mounting hole for the long probe to extend out is formed in the first needle die.

Furthermore, the needle mold interlayer is fixed at the top of the third needle mold, an installation bulge is arranged on the side surface of one side, close to the third needle mold, of the needle mold interlayer, and a plurality of second installation holes for the long probes to penetrate through are formed in the installation bulge.

Specifically, the third needle die is provided with a mounting groove into which the mounting protrusion of the needle die interlayer can be inserted on a side surface of the third needle die close to the needle die interlayer, and a third mounting hole through which the long probe can penetrate is formed in the mounting groove.

Specifically, a plurality of supporting columns are arranged between the third needle mold and the second needle mold, the tops of the supporting columns are fixedly connected with the second needle mold, the bottoms of the supporting columns are fixedly connected with the third needle mold, and the needle mold interlayer is sleeved on the supporting columns.

Specifically, fourth mounting holes for the needle sleeve threads to penetrate through are formed in the fourth needle die and the fifth needle die, and the needle sleeve threads penetrate through the fourth needle die from bottom to top and then abut against the long probes.

Further, long probe is including the head end, middle section and the tail end that from top to bottom connect gradually, the head end have with the product that awaits measuring the most advanced of test contact, the surface of middle section is provided with the insulating layer, the tail end have with middle section fixed connection's straightway and be located the straightway end can with the bulb of needle sleeve line butt.

Specifically, the head end of the long probe penetrates between the first needle die and the second needle die, and the tip end of the head end can extend out of the first mounting hole of the first needle die.

Specifically, the diameter of the head end is 0.07mm.

Specifically, a straight line segment of the tail end of the long probe penetrates through the third needle die, and a ball head of the tail end is located on the side face of the third needle die, which is close to one side of the fourth needle die.

Specifically, the diameter of a straight line section of the tail end is 0.07mm, and the diameter of the ball head is 0.13mm.

The utility model provides a beneficial effect of real four-wire test needle mould lies in: the flexible circuit board testing device has the advantages that the needle die modules and the probe modules are arranged, two long probes are arranged in each probe module, the two long probes can be pricked on the testing contact with the width of 240um, true four-line testing of the flexible circuit board is completed, the flexible circuit board testing device is particularly suitable for being used in resistance testing of the flexible circuit board with small resistance value, testing accuracy is improved, contact pressure can be controlled, and indentation cannot be generated on the testing contact.

Drawings

Fig. 1 is a schematic perspective view of a true four-wire test needle mold provided by the present invention;

fig. 2 is a schematic diagram of a three-dimensional structure of a product to be tested, which is tested by the true four-wire test needle mold provided by the present invention;

fig. 3 is a full sectional view of a true four-wire test pin die provided by the present invention;

fig. 4 is a front view of a middle long probe of a true four-wire test needle model provided by the present invention.

In the figure: the method comprises the following steps of 100-real four-line testing needle die, 10-needle die assembly, 11-first needle die, 111-first mounting hole, 12-second needle die, 13-needle die interlayer, 131-mounting protrusion, 132-second mounting hole, 14-third needle die, 141-mounting groove, 142-third mounting hole, 15-fourth needle die, 16-fifth needle die, 17-supporting column and 18-fourth mounting hole; 20-probe assembly, 21-long probe, 211-head end, 2111-tip end, 212-middle section, 213-tail end, 2131-straight section and 2132-ball end; 30-product under test, 31-connector, 32-test contact.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1-4, a true four-wire test pin mold 100 is provided in accordance with the present invention. This real four-wire test needle mould 100 can be arranged in the resistance test of flexible circuit board to use, is particularly useful for the little novel flexible circuit board of resistance value to can prick two probes simultaneously on the same gilding face on the connector of flexible circuit board, in order to reduce probe and test line to the resistance value influence of connector, improve the accuracy nature and the stability of test, also can not produce the indentation to the gilding face of connector simultaneously.

Further, as shown in fig. 1, it is a schematic perspective view of a real four-wire test pin mold 100 provided by the present invention. The utility model provides a real four-wire test needle mould 100, including the needle mould module 10 that bears the product 30 that awaits measuring and set up a plurality of groups in needle mould module 10 can with the probe module 20 of the product 30 contact that awaits measuring. The pin die module 10 is arranged in a test device of a flexible circuit board, and can test the resistance value of a product to be tested placed on the pin die module. The pin die set 10 is used for carrying and positioning the product 30 to be tested, and the probe die set 20 is contacted with the product 30 to be tested in the testing process, so that the testing process is completed. The probe module 20 is located inside the probe module 10 in a non-testing state, and can extend from bottom to top only in a testing state, and is in contact with the product 30 to be tested to realize electrical connection, so as to complete the testing of the resistance value of the product 30 to be tested.

As shown in fig. 2, it is a schematic diagram of a three-dimensional structure of a product 30 to be tested, which is tested by the real four-wire testing needle module 100 according to the present invention. The utility model provides an among the real four-wire test needle mould 100 test to the flexible circuit board, especially test to the connector on the flexible circuit board. As shown in fig. 2, the product to be tested 30 is provided with a connector 31, and the connector 31 is provided with a plurality of test contacts 32. As shown in fig. 2, the connector 31 has two rows of test contacts 32, and each test contact 32 is arranged in a row, and each row has 16 test contacts 32. Each test contact 32 is a gold-plated surface, and the probe module 20 needs to contact the gold-plated surface to complete the test. The utility model provides a quantity that lies in probe module 20 in needle module 10 in the true four-wire test needle module 100 is relevant with the product 30 that awaits measuring, and the quantity of the test contact 32 that has on the connector 31 of the product 30 that awaits measuring promptly is unanimous with the quantity of probe module 20 in the needle module 10 to this probe module 20 sets up with test contact 32 one-to-one, makes the position of every probe module 20 align from top to bottom rather than the test contact 32's that corresponds position. As shown in fig. 3, the present invention provides a full-section view of a true four-wire test pin die 100. In order to show the internal structure, only one group of probe modules 20 in the true four-wire test pin die 100 is shown, and under the actual test condition, the number of the probe modules 20 is consistent with that of the test contacts 32 on the product 30 to be tested, and the positions of the probe modules 20 are up-down corresponding.

Further, as shown in fig. 3, the probe module 20 of the true four-wire test probe mold 100 provided by the present invention includes two long probes 21 capable of contacting the same test contact 32 at the same time and two needle wires 22 electrically connected to the long probes 21 respectively. Each set of probe modules 20 includes two long probes 21 and a needle hub 22 electrically connected thereto. And each group of probe modules 20 simultaneously contact the same test contact 32 in the product 30 to be tested, thereby realizing true four-wire test with two probes at the same point.

Further, as shown in fig. 1, the needle mold set 10 of the real four-wire testing needle mold 100 provided by the present invention includes a first needle mold 11, a second needle mold 12, a needle mold interlayer 13, a third needle mold 14, a fourth needle mold 15 and a fifth needle mold 16, which are sequentially stacked from top to bottom. First needle mould 11 and second needle mould 12 in this needle mould module 10 realize relative swing joint through elasticity guide pillar, copper sheathing and linear bearing float to realize the elastic connection between first needle mould 11 and the second needle mould 12, make under test status, can stretch out probe module 20 by the top of first needle mould 11. And the third needle die 14, the fourth needle die 15 and the fifth needle die 16 are relatively and fixedly connected through connecting pieces. The second needle die 12 and the third needle die 14 are fixedly connected through a support column 17, and a needle die interlayer 13 is arranged in the second needle die and the third needle die. And the utility model provides a needle mould intermediate layer 13 among the needle mould module 10 is fixed in the upper surface of third needle mould 14 to through connecting piece such as screw, pin and third needle mould 14 fixed connection. The pin mold sandwich 13 can realize position adjustment relative to the second pin mold 12 according to the cooperation of the connecting piece and the gasket, so that the bending deformation amount of the long probe 21 in the probe module 20 is controlled through the pin mold sandwich 13. The needle mold interlayer 13 in the needle mold module 10 is used to control the bending deformation of the long probes 21, so that the problem of short circuit caused by contact between two long probes 21 in the probe module 20 can be effectively prevented, and the test stability of the true four-wire test needle mold 100 is improved.

As shown in fig. 1, a groove for placing a product 30 to be tested is provided on the top surface of the first pin mold 11, the product 30 to be tested is placed in the groove on the top surface of the first pin mold 11, and as shown in fig. 3, a first mounting hole 111 for extending the long probe 21 is provided on the first pin mold 11. In the testing state, the allopatric needle model 11 and the second needle model 12 are close to each other, so that the long probe 21 positioned in the first mounting hole 111 extends out of the top surface of the first needle model 11 and contacts the product 30 to be tested positioned on the top surface of the first needle model 11 for testing.

Further, as shown in fig. 3, in the needle mold module 10 provided by the present invention, the needle mold interlayer 13 is fixed on the top of the third needle mold 14, the needle mold interlayer 13 is provided with an installation protrusion 131 on the side surface close to the third needle mold 14, and the installation protrusion 131 is provided with a plurality of second installation holes 132 for the long probes 21 to penetrate. The needle mold sandwich layer 13 is provided with the installation protrusion 131 in the region where the long probe 21 is penetrated, thereby increasing the penetrating length of the long probe 21 and controlling more bending deformation amount of the long probe 21. The second mounting holes 132 disposed on the mounting protrusions 131 penetrate the needle mold sandwich 13 from top to bottom, and the number of the second mounting holes 132 disposed on the needle mold sandwich 13 is the same as the sum of all the probe modules 20 in the testing needle mold 100.

Specifically, as shown in fig. 3, the third needle mold 14 in the needle mold module 10 is provided with an installation groove 141 on a side surface close to the needle mold interlayer 13, into which the installation protrusion 131 of the needle mold interlayer 13 can be inserted, and a third installation hole 142 is provided in the installation groove 141, through which the long probe 21 can be inserted. The installation groove 141 in the pin mold unit 10 is just for accommodating the installation protrusion 131 in the pin mold sandwich 13, and as shown in fig. 3, the depth of the installation groove 141 is greater than the height of the installation protrusion 131, so that when the pin mold sandwich 13 is fixedly connected with the third pin mold 14, there is a certain adjustment space, which provides a certain adjustment amount for the long probe 21 of the pin mold sandwich 13.

Specifically, as shown in fig. 3, a plurality of support columns 17 are disposed between the third pin mold 14 and the second pin mold 12 in the pin mold module 10, the top of each support column 17 is fixedly connected to the second pin mold 12, the bottom of each support column 17 is fixedly connected to the third pin mold 14, and the pin mold interlayer 13 is sleeved on each support column 17. The needle mold sandwich 13 can adjust the relative position between the needle mold sandwich and the second needle mold 12 in the vertical space where the supporting column 17 is located. When the needle mold sandwich 13 is fixed to the top of the third needle mold 14, a spacer or the like may be provided between the third needle mold 14 and the needle mold sandwich 13 to adjust the distance between the needle mold sandwich 13 and the second needle mold 12, thereby adjusting the position of the long probe 21 in the needle mold set 10, and further controlling the bending amount of the long probe 21 in the needle mold set 10 by the needle mold sandwich 13.

Further, as shown in fig. 3, the fourth needle mold 15 and the fifth needle mold 16 in the needle mold module 10 are both provided with a fourth mounting hole 18 through which the needle covering wire 22 can pass, and the needle covering wire 22 passes through the fourth needle mold 15 from bottom to top and then abuts against the long probe 21. The top surface of the fourth needle mold 15 is provided with a groove, and when the fourth needle mold 15 is fixedly connected to the third needle mold 14, the groove is an installation space for electrically connecting the long probe 21 in the probe module 20 and the needle threading 22, wherein the needle threading 22 passes through the fourth installation hole 18 of the fourth needle mold 15 from bottom to top and extends into the groove. And the long probe 21 passes through the third mounting hole 142 of the third pin mold 14 from top to bottom to extend into the groove. The long probe 21 and the needle hub 22 are in contact in the groove to achieve electrical connection.

Further, as shown in fig. 4, it is a schematic perspective view of the long probe 21 in the probe module 20 according to the present invention. The utility model provides a long probe 21 is including head end 211, middle section 212 and tail end 213 that from top to bottom connects gradually. As shown in fig. 4, the distance of the middle section 212 is long, and thus the identification is omitted. In this embodiment, the overall length of the long probe 21 is 30mm, wherein the total length of the head end 211 is 3mm, the length of the tail end 213 is 0.2mm, and the length of the middle portion 212 is the largest.

Specifically, as shown in fig. 4, the head end 211 of the long probe 21 has a tip 2111 contacting the test contact 32 of the product 30 to be tested, and the tip 2111 may completely protrude out of the first mounting hole 111 of the first pin die 11 and contact the product 30 to be tested at the time of testing. The outer surface of the middle section 212 of the long probe 21 is provided with an insulating layer, so that when the long probe 21 moves relatively or contacts the product 30 to be measured, the long probe 21 and the product 30 are bent and touch each other, short circuit does not occur. The tail end 213 of the long probe 21 has a straight section 2131 fixedly connected to the middle section 212 and a ball 2132 located at the end of the straight section 2131 and capable of abutting against the needle sheath 22. Since there is no insulating layer outside the straight line segment 2131 on the tail end 213, when the bending amount of the long probe 21 is too large during testing, the straight line segments 2131 of two adjacent long probes 21 are likely to touch and cause short circuit, and therefore, the problem of touch and short circuit on the tail end 213 can be effectively avoided by controlling the bending amount of the long probe 21 through the needle mold layer 13. The ball 2132 of the tail end 213 increases the contact area between the long probe 21 and the needle sheath wire 22, thereby ensuring the electrical connection between the long probe 21 and the needle sheath wire 22.

Specifically, as shown in fig. 3, the head end 211 of the long probe 21 in the probe module 20 is inserted between the first needle mold 11 and the second needle mold 12, and the tip 2111 of the head end 211 can protrude from the first mounting hole 111 of the first needle mold 11. The diameter of the head end 211 is 0.07mm, so that two long probes 21 in the same probe module 20 can be bound on the test contacts 32 of the connector 31 with the width of 240 um.

Specifically, as shown in fig. 3, a straight segment 2131 of the tail end 213 of the long probe 21 is inserted into the third needle mold 14, and a ball head 2132 of the tail end 213 is located on a side surface of the third needle mold 14 close to the fourth needle mold 15. The tail end 213 of the long probe 21 is located on the bottom surface of the third pin mold 14, and the ball 2132 of the third pin mold 14 is clamped at the bottom of the third mounting hole 142 of the third pin mold 14, so that the long probe 21 is prevented from being loosened from the pin mold module 10. The straight segment 2131 of the tail end 213 of the long probe 21 has a diameter of 0.07mm, and the ball 2132 has a diameter of 0.13mm. The ball 2132 of the tail end 213 contacts the needle cannula 22 at the bottom of the third needle module 14 for electrical connection.

The utility model provides a real four-wire test needle mould 100 has needle mould module 10 and probe module 20, all has two long probes 21 in every probe module 20, and two long probes 21 can prick on the width is 240 um's test contact 32, accomplish the real four-wire test to flexible circuit board, use in the resistance test of the flexible circuit board that is particularly useful for resistance value little, improve the accuracy nature of test, but the pressure of control contact can not produce the indentation on test contact 32.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. A real four-wire test needle die is characterized by comprising a needle die module for bearing a product to be tested and a plurality of groups of probe modules which are arranged in the needle die module and can be contacted with the product to be tested, wherein a connector is arranged on the product to be tested, a plurality of test contacts are arranged on the connector, and the probe modules and the test contacts are arranged in a one-to-one correspondence manner;

the probe module comprises two long probes which can be simultaneously contacted with the same test contact and two needle sleeve lines which are respectively and electrically connected with the long probes;

the needle die module comprises a first needle die, a second needle die, a needle die interlayer, a third needle die, a fourth needle die and a fifth needle die which are sequentially overlapped from top to bottom, a product to be detected is placed on the top surface of the first needle die, and a first mounting hole for the long probe to extend out is formed in the first needle die.

2. The real four-wire test needle mold as claimed in claim 1, wherein the needle mold sandwich is fixed to the top of the third needle mold, the needle mold sandwich is provided with a mounting protrusion on a side surface thereof adjacent to the third needle mold, and the mounting protrusion is provided with a plurality of second mounting holes for the long probes to pass through.

3. The real four-wire test needle die as claimed in claim 2, wherein the third needle die is provided at a side surface thereof adjacent to the needle die sandwich layer with a mounting groove into which the mounting protrusion of the needle die sandwich layer is inserted, and a third mounting hole through which the long probe is inserted is provided in the mounting groove.

4. The real four-wire test needle mold as claimed in claim 2, wherein a plurality of supporting columns are provided between the third needle mold and the second needle mold, the top of each supporting column is fixedly connected to the second needle mold, the bottom of each supporting column is fixedly connected to the third needle mold, and the needle mold interlayer is sleeved on the supporting columns.

5. The true four-wire test needle die as claimed in claim 1, wherein each of the fourth needle die and the fifth needle die is provided with a fourth mounting hole for the needle cover thread to pass through, and the needle cover thread passes through the fourth needle die from bottom to top and abuts against the long probe.

6. The real four-wire test needle mold as claimed in claim 1, wherein the long probe comprises a head end, a middle section and a tail end sequentially connected from top to bottom, the head end has a tip end contacting the test contact of the product to be tested, an insulating layer is disposed on an outer surface of the middle section, and the tail end has a straight section fixedly connected with the middle section and a ball head at an end of the straight section and capable of abutting against the needle wiring.

7. The real four wire test pin die as claimed in claim 6, wherein the head end of the long probe is inserted between the first pin die and the second pin die, and the tip end of the head end is protruded from the first mounting hole of the first pin die.

8. The true four wire test pin die of claim 7, wherein the head end has a diameter of 0.07mm.

9. The real four wire test pin mold as claimed in claim 6, wherein the straight line segment of the tail end of the long probe is inserted into the third pin mold, and the ball end of the tail end is located on the side of the third pin mold close to the fourth pin mold.

10. The true four-wire test pin die as claimed in claim 9, wherein the diameter of the straight section of the tail end is 0.07mm, and the diameter of the ball head is 0.13mm.

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