Four-wire blade probe mechanism of flying probe machine

Abstract

The utility model relates to the technical field of flying probe machines, and provides a four-wire blade probe mechanism of a flying probe machine, which comprises an upper tool apron connected with a probe swing arm, a connecting assembly connected with the upper tool apron, and a left blade needle assembly and a right blade needle assembly which are detachably arranged on the connecting assembly, the distance between the left blade needle assembly and the right blade needle assembly is adjustable; the four-wire blade probe mechanism is compact in overall structure, small in width and size and capable of meeting the measurement requirement of a small bonding pad, the left blade needle assembly and the right blade needle assembly are independently and detachably arranged, after the fatigue life expires or accidental collision needle damage occurs, the single blade needle assembly can be detached and replaced conveniently, the whole probe mechanism does not need to be replaced, and the working efficiency is improved. Therefore, the maintenance cost of the probe machine is saved, the distance between the left blade needle assembly and the right blade needle assembly is adjustable, the small distance of the needle tip is adjusted, and the technical requirement for testing the minimum bonding pad is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a flying probe machine technical field, concretely is a kind of four-wire blade probe mechanism of flying probe machine. BACKGROUND

[0002] In electronic manufacturing industry, flying probe machine is widely used in the production line of various electronic products as a kind of efficient, accurate circuit board testing equipment to ensure that the electrical connection performance of circuit board meets the design requirements, four-wire testing principle is tested by introducing two of the four pins, and the other two pins receive return signal, this testing method can test all electrical performance parameters of circuit board, including on, insulation, capacitance, inductance and other parameters, one group of two independent probes applies current, and the other group measures voltage, thereby eliminating the influence of test line and contact resistance, more accurate measurement can be realized. Four-wire testing is suitable for high requirement electronic product manufacturing, such as communication equipment, computer, medical equipment, especially in the production of high-frequency products.

[0003] Traditional four-wire probe has large volume and width, which cannot meet the testing requirements of smaller pads. In addition, after a certain fatigue, the probe spring will appear plastic deformation, needle tip wear and other situations, and the needle needs to be replaced. Since the traditional four-wire blade probe has poor replaceability, the whole tool holder needs to be replaced, which has high cost.

[0004] Therefore, the utility model provides a four-wire blade probe mechanism of flying probe machine to solve the above problems. UTILITY MODEL CONTENT

[0005] The embodiment of the utility model aims to provide a four-wire blade probe mechanism of flying probe machine to solve the above problems.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] A four-wire blade probe mechanism of flying probe machine, comprising an upper tool holder connected with a probe swing arm, a connecting assembly connected with the upper tool holder, and a left blade needle assembly and a right blade needle assembly detachably provided on the connecting assembly, the distance between the left blade needle assembly and the right blade needle assembly is adjustable.

[0008] In an alternative scheme, a clamping groove adapted to the connecting part of the probe swing arm is arranged on the upper tool holder, a copper-embedded nut in the form of a flange is arranged on one side of the clamping groove, a through hole is arranged on the other side, and the copper-embedded nut is opposite to the through hole.

[0009] In an alternative scheme, the connecting assembly is composed of a connecting seat and an adjusting seat, and the left blade needle assembly and the right blade needle assembly are arranged on the adjusting seat.

[0010] In an alternative, the left blade needle assembly comprises a left base, a left elastic seat arranged on the left base, and a left blade probe arranged on the left elastic seat; and the right blade needle assembly comprises a right base, a right elastic seat arranged on the right base, and a right blade probe arranged on the right elastic seat.

[0011] In an alternative, the left elastic seat and the right elastic seat are made of rubber spring material.

[0012] In an alternative, the four-wire blade probe mechanism further comprises a sensor assembly for detecting the contact pressure of the right blade probe, the sensor assembly comprising a sensor seat and a slot photoelectric sensor arranged on the sensor seat, the sensor seat being arranged on the adjusting seat, the right blade needle assembly being arranged on the sensor seat, the right elastic seat being clamped in the sensing slot of the slot photoelectric sensor, and the left blade probe and the right blade probe being of the same height.

[0013] In an alternative, the adjusting seat is provided with a plurality of adjusting holes, the sensor seat is provided with a plurality of waist-shaped holes corresponding to the adjusting holes one by one, and the sensor seat is installed on the adjusting seat by bolts.

[0014] In an alternative, the four-wire blade probe mechanism further comprises a circuit board for connecting with the left blade needle assembly, the right blade needle assembly, and the sensor assembly, and connecting with a back-end probe measuring system.

[0015] Compared with the prior art, the beneficial effects of the embodiments of the present application are as follows:

[0016] The four-wire blade probe mechanism has a compact overall structure, a small width and volume, and can meet the measurement requirements of small pads. The left blade needle assembly and the right blade needle assembly are independently and detachably arranged, so that the single blade needle assembly can be replaced when the fatigue life expires or the needle is damaged by accident, thereby saving the maintenance cost of the probe machine. The distance between the left blade needle assembly and the right blade needle assembly is adjustable, the small distance between the needle tips is adjusted, and the technical requirements for testing the smallest pads are met.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application. The drawings and description are not intended to limit the scope of the present application in any way.

[0019] Figure 1 It is a structure schematic view of the embodiment of the utility model.

[0020] Figure 2 It is a side view of the embodiment of the utility model.

[0021] Figure 3 It is a structure schematic view of the upper tool holder in the embodiment of the utility model.

[0022] Figure 4 It is a structure schematic view of the connecting assembly in the embodiment of the utility model.

[0023] Figure 5 It is a structure schematic view of the left blade needle assembly in the embodiment of the utility model.

[0024] Figure 6 It is a structure schematic view of the right blade needle assembly in the embodiment of the utility model.

[0025] Figure 7 It is a structure schematic view of the sensor assembly in the embodiment of the utility model.

[0026] Figure 8 It is a side view of the sensor assembly in the embodiment of the utility model.

[0027] Mark annotation: 1 - upper tool holder, 2 - connecting assembly, 201 - connecting seat, 202 - adjusting seat, 3 - left blade needle assembly, 301 - left base, 302 - left elastic seat, 303 - left blade probe, 4 - sensor assembly, 401 - sensor seat, 402 - slot photoelectric sensor, 5 - circuit board, 6 - clamping groove, 7 - copper embedded nut, 8 - through hole, 9 - right blade needle assembly, 901 - right base, 902 - right elastic seat, 903 - right blade probe. DETAILED DESCRIPTION

[0028] The following detailed description of the application in conjunction with the drawings, it is necessary to point out here that the following detailed description is only used to further illustrate the application, can not be understood as limiting the scope of the application, the skilled person can make some non-essential improvements and adjustments to the application according to the above application.

[0029] Please refer to Figure 1 And Figure 2 A four-wire blade probe mechanism of a flying probe machine, comprising an upper tool holder 1 for connecting with a probe swing arm, a connecting assembly 2 connected with the upper tool holder 1, and a left blade needle assembly 3 and a right blade needle assembly 9 (the left blade needle assembly 3 and the right blade needle assembly 9 can be detachably installed by bolts, bayonets and the like, which are not limited by the application) detachably provided on the connecting assembly 2, the distance between the left blade needle assembly 3 and the right blade needle assembly 9 is adjustable.

[0030] The four-line blade probe mechanism has compact overall structure, small width volume, can meet the measurement requirement of small pads, the left blade needle assembly 3 and the right blade needle assembly 9 are independently detachably arranged, after fatigue life expires or accidental needle damage, the single-group blade needle assembly can be conveniently replaced, the whole probe mechanism is not needed to be replaced, thereby the probe machine maintenance cost is saved, the distance between the left blade needle assembly 3 and the right blade needle assembly 9 is adjustable (it is needed to be explained that this refers to fine adjustment), the tiny distance of needle tips is realized, and the technical requirement of meeting the smallest pad test is met.

[0031] Please refer to Figure 3 In an embodiment of the utility model, the upper tool seat 1 is equipped with a clamping groove 6 matched with the probe swing arm connecting part, one side of the clamping groove 6 is equipped with a copper-embedded nut 7 in the form of a flange, the other side is equipped with a through hole 8, and the copper-embedded nut 7 is opposite to the through hole 8.

[0032] In the embodiment, the four-line blade probe mechanism is clamped to the probe swing arm connecting part through the clamping groove 6, and then fixed through a bolt (it is needed to be explained that the probe swing arm connecting part is equipped with a hole for the bolt to pass through), so that the four-line blade probe mechanism is fixed on the probe swing arm, and the four-line blade probe mechanism is driven to displace by the probe swing arm to perform detection.

[0033] Further, in the embodiment, the upper tool seat 1 is made of high-rigidity engineering plastic, which ensures the strength and reduces the load of the probe swing arm.

[0034] Please refer to Figure 1 、 Figure 2 、 Figures 4-8 In an embodiment of the utility model, the connecting assembly 2 is composed of a connecting seat 201 and an adjusting seat 202, the left blade needle assembly 3 and the right blade needle assembly 9 are arranged on the adjusting seat 202.

[0035] The left blade needle assembly 3 comprises a left base 301, a left elastic seat 302 arranged on the left base 301, and a left blade probe 303 arranged on the left elastic seat 302, and the right blade needle assembly 9 comprises a right base 901, a right elastic seat 902 arranged on the right base 901, and a right blade probe 903 arranged on the right elastic seat 902.

[0036] The four-wire blade probe mechanism further comprises a sensor assembly 4 for detecting the right blade probe 903 needle tip touch pressure degree, the sensor assembly 4 comprises a sensor seat 401 and a groove photoelectric sensor 402 arranged on the sensor seat 401, the sensor seat 401 is arranged on the adjusting seat 202, the right blade needle assembly 9 is arranged on the sensor seat 401, the right elastic seat 902 is clamped in the sensing groove of the groove photoelectric sensor 402, the left blade probe 303 and the right blade probe 903 are equal in height;

[0037] A plurality of adjusting holes 203 are arranged on the adjusting seat 202, and a waist-shaped hole corresponding to the adjusting hole 203 is arranged on the sensor seat 401, and the sensor seat 401 is installed on the adjusting seat 202 through bolts.

[0038] It should be noted that the left blade needle assembly 3 and the right blade needle assembly 9 further comprise a plurality of devices for realizing current application, voltage measurement and other detection functions, which are prior art and will not be described here; in addition, the left blade probe 303 and the right blade probe 903 are each provided with two pins.

[0039] In the embodiment, the plurality of adjusting holes 203 on the adjusting seat 202 correspond to the waist-shaped holes on the sensor seat 401, the arrangement of the waist-shaped holes enables the position of the sensor seat 401 to be adjusted to a certain extent, i.e. to drive the right blade needle assembly 9 to adjust, so as to realize the adjustment of the distance between the left blade needle assembly 3 and the right blade needle assembly 9, i.e. to realize the adjustment of the small distance between the needle tips of the left blade probe 303 and the right blade probe 903, to meet the technical requirements of testing the smallest pad; one side of the sensing groove of the groove photoelectric sensor 402 is a light-emitting diode, and the other side is a photosensitive element (such as a photoelectric transistor), different light intensity will generate different light current signals, and the right blade probe 903 is controlled to contact the circuit board test point through the acquisition and processing of the current signal, specifically, whether the right blade probe 903 needle tip contacts the circuit board test point is judged through the change of the electric signal, and the deformation amount of the right elastic seat 902 is judged through the current signal change amount, and then the contact pressure between the right blade probe 903 needle tip and the circuit board test point can be obtained according to the mechanical Hook's law, the circuit board test action is accurately controlled through the above closed-loop control, and the stability and accuracy of the measurement data are maintained; the purpose of setting the left blade probe 303 and the right blade probe 903 to be equal in height is that the working state of the left blade probe 303 and the right blade probe 903 can be synchronously controlled through a group of sensor assemblies 4, so as to simplify the structure and reduce the cost.

[0040] Further, in the embodiment, the left elastic seat 302 and the right elastic seat 902 are both made of rubber spring material and have a certain elastic buffering effect, so as to achieve the purpose of soft protection of the circuit board during testing, so as to avoid scratching and leaving needle marks on the circuit board.

[0041] Referring to Figure 1 In one embodiment of the utility model, four line blade probe mechanism still includes circuit board 5, be used for with left blade needle subassembly 3, right blade needle subassembly 9, sensor subassembly 4 passage connection and with rear end probe machine measurement system connection, be equipped with corresponding interface on circuit board 5.

[0042] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, the description of the specification is only for the sake of clarity, the skilled person should consider the specification as a whole, the technical solutions in each embodiment can also be combined appropriately to form other embodiments that the skilled person can understand.

Claims

1. A four-wire blade probe mechanism of a flying probe machine, characterized by, The utility model relates to a four-line blade probe mechanism, which comprises an upper tool rest (1) connected with a probe swing arm, a connecting assembly (2) connected with the upper tool rest (1), and a left blade needle assembly (3) and a right blade needle assembly (9) detachably arranged on the connecting assembly (2), wherein the distance between the left blade needle assembly (3) and the right blade needle assembly (9) is adjustable.

2. The four-wire blade probe mechanism of a flying probe machine according to claim 1, wherein, The upper tool rest (1) is provided with a clamping groove (6) matched with the connecting part of the probe swing arm, one side of the clamping groove (6) is provided with a copper-embedded nut (7) in the form of a flange, and the other side is provided with a through hole (8), and the copper-embedded nut (7) is opposite to the through hole (8).

3. The four-wire blade probe mechanism of a flying probe machine according to claim 1, wherein, The connecting assembly (2) is composed of a connecting seat (201) and an adjusting seat (202), and the left blade needle assembly (3) and the right blade needle assembly (9) are arranged on the adjusting seat (202).

4. The four-wire blade probe mechanism of a flying probe machine according to claim 3, wherein, The left blade needle assembly (3) comprises a left base (301), a left elastic seat (302) arranged on the left base (301), and a left blade probe (303) arranged on the left elastic seat (302), and the right blade needle assembly (9) comprises a right base (901), a right elastic seat (902) arranged on the right base (901), and a right blade probe (903) arranged on the right elastic seat (902).

5. The four-wire blade probe mechanism of a flying probe machine according to claim 4, wherein, The left elastic seat (302) and the right elastic seat (902) are both made of rubber spring material.

6. The four-wire blade probe mechanism of a flying probe machine according to claim 4, wherein, The four-line blade probe mechanism further comprises a sensor assembly (4) for detecting the pressure of the tip of the right blade probe (903), the sensor assembly (4) comprises a sensor seat (401) and a slot-shaped photoelectric sensor (402) arranged on the sensor seat (401), the sensor seat (401) is arranged on the adjusting seat (202), the right blade needle assembly (9) is arranged on the sensor seat (401), the right elastic seat (902) is clamped in the sensing slot of the slot-shaped photoelectric sensor (402), and the left blade probe (303) and the right blade probe (903) are of the same height.

7. The four-wire blade probe mechanism of a flying probe machine according to claim 6, wherein, The adjusting seat (202) is provided with a plurality of adjusting holes (203), the sensor seat (401) is provided with a waist-shaped hole corresponding to the adjusting holes (203) one by one, and the sensor seat (401) is installed on the adjusting seat (202) through bolts.

8. The four-wire blade probe mechanism of a flying probe machine according to claim 6, wherein, The four-line blade probe mechanism further comprises a circuit board (5) for connecting with the left blade needle assembly (3), the right blade needle assembly (9), the sensor assembly (4), and connecting with a rear-end probe machine measurement system.

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