CN114879012B - Plane type flying probe testing device - Google Patents
Plane type flying probe testing device Download PDFInfo
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- CN114879012B CN114879012B CN202210517201.3A CN202210517201A CN114879012B CN 114879012 B CN114879012 B CN 114879012B CN 202210517201 A CN202210517201 A CN 202210517201A CN 114879012 B CN114879012 B CN 114879012B
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- 239000000523 sample Substances 0.000 title claims abstract description 43
- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- RVCKCEDKBVEEHL-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobenzyl alcohol Chemical compound OCC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RVCKCEDKBVEEHL-UHFFFAOYSA-N 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
- G01R31/2808—Holding, conveying or contacting devices, e.g. test adapters, edge connectors, extender boards
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Leads Or Probes (AREA)
Abstract
The invention relates to the field of circuit measurement, in particular to a plane flying probe testing device. The movable part can freely move along the horizontal direction, a plurality of clamping plates are circumferentially and uniformly distributed below the fixed disc, and a first chute and a second chute are arranged on the clamping plates. Each first sliding block is slidably arranged in one first sliding groove, each second sliding block is slidably arranged in the second sliding groove, and a second spring is arranged between the second sliding block and the second sliding groove. Each clamping table is fixedly arranged at the lower end of one clamping block, and the upper end face of the clamping table extends towards the axial direction of the fixing plate relative to the clamping block. The clamping table is configured to receive a thrust force in a direction away from the axis of the fixed disk at the same time when the lower end face receives an upward thrust force. The initial state of the clamping column is contacted with the inclined surfaces of the clamping blocks at the same time, and the radius of the clamping column is smaller than the distance between the clamping blocks and the axis of the fixed disc; the upper end of the needle head is fixedly connected with the clamping block, and the clamping columns are clamped by the clamping tables so as to achieve the effect of conveniently installing the probe.
Description
Technical Field
The invention relates to the field of circuit measurement, in particular to a plane flying probe testing device.
Background
The flying probe tester is used for testing the circuit board, and is divided into two main types, namely testing the PCB and testing the PCBA. A flying probe tester for testing a PCB (printed circuit board) is an instrument for testing a PCB with high-density component arrangement, multiple layers, large wiring density and small measuring point distance, mainly tests insulation and conduction values of a circuit board, and can monitor a testing process and fault points in real time by adopting a true value comparison positioning method, so that the testing accuracy is ensured. The flying probe tester for testing PCBA mainly performs electrical tests on the values, electrical characteristics and the like of electronic components.
The flying needle of flying needle test machine is fixed through flying needle seat installation, is fixed the flying needle seat through the bolt on the current flying needle test machine, and current structure operation of installing fixed to the flying needle seat is comparatively laborious, is inconvenient for installing the flying needle seat, and the bolt exists the risk of slide fastener easily for the flying needle seat appears becoming flexible easily, influences positioning accuracy, leads to its use convenience relatively poor, and the reliability is relatively poor.
Disclosure of Invention
The invention provides a plane flying probe testing device, which aims to solve the problem of complex probe installation of the existing device.
The invention relates to a plane flying probe testing device, which adopts the following technical scheme:
a plane flying probe testing device comprises a moving part, a fixed disc, a clamping set price and a probe; the movable part can freely move along the horizontal direction; the fixed disc is horizontally arranged and connected with the moving part; the clamping assembly comprises a plurality of clamping plates, a plurality of first sliding blocks, a plurality of second sliding blocks, a plurality of clamping blocks and a plurality of clamping tables; the clamping plates are circumferentially and uniformly arranged below the fixed disc, and a first chute and a second chute are arranged on the clamping plates; the first sliding groove is vertically arranged, the second sliding groove is horizontally arranged, and the upper end of the first sliding groove is communicated with one end, close to the axis of the fixed disc, of the second sliding groove; each first sliding block is slidably arranged in one first sliding groove; each second sliding block is slidably arranged in the second sliding groove, and a second spring is arranged between the second sliding block and the second sliding groove; each clamping block is fixedly connected with one first sliding block; each clamping table is fixedly arranged at the lower end of one clamping block, and the upper end surface of the clamping table extends towards the axial direction of the fixing plate relative to the clamping block; the lower end surface of the clamping table is an inclined surface and is configured to receive a split thrust in the direction away from the axis of the fixed disc when the lower end surface receives an upward thrust; the probe comprises a needle head and a clamping column; the initial state of the clamping column is contacted with the inclined surfaces of the clamping blocks at the same time, and the radius of the clamping column is smaller than the distance between the clamping blocks and the axis of the fixed disc; the needle is vertically arranged, and the upper end of the needle is fixedly connected with the clamping block.
Further, the lower end of the clamping column is provided with a cone with a large diameter at the upper part and a small diameter at the lower part; the transverse edge of the upper end of the clamping table, which is close to one side of the axis of the fixed disc, is provided with a conical surface which can be matched with the cone of the clamping column, so that when the clamping column slides to the upper part of the clamping table, the cone of the clamping column is clamped by the opposite surfaces of the clamping tables.
Further, a pressing component is arranged between each clamping block and the rotating disc; the pressing component is used for pressing the clamping block downwards when the clamping column moves upwards for a preset distance; a first spring is arranged in the first chute; the lower end of the first spring is connected with the bottom of the first chute, and the upper end of the first spring is fixedly connected with the first sliding block; a notch is arranged on the side wall of the lower end of the first chute; the first sliding block is positioned at the notch position of the first sliding groove and can rotate; the initial position of the first sliding block is positioned above the notch so as to drive the first sliding block to slide downwards to the notch when the clamping block is subjected to downward pressure.
Further, the pressing component comprises a sliding plate, a pressing spring and a pushing block; the sliding plate is arranged on the lower surface of the fixed disc in a sliding way along the radial direction; the upper end of the downward pressing spring is connected with the sliding plate, and the lower end of the downward pressing spring is fixedly connected with the clamping block; the initial state of the pressing spring is in an inclined state, so that the pressing spring tends to be inclined in a vertical state when the sliding plate slides to one side far away from the axis of the fixed disc; the pushing block is arranged at the axle center of the lower end of the fixed disc in a vertically sliding way, and is contacted with the sliding plate so as to push the sliding plate to slide to one side far away from the axle center when the pushing block slides upwards; the pushing block is connected with the clamping column.
Further, the pushing block is connected with the clamping column through an elastic component; the elastic component comprises a main spring and a connecting block; the connecting block can be connected with the axle center of the fixed disc in an up-and-down sliding way; the pushing block is fixedly connected with the connecting block; the upper end of the main spring is fixedly connected with the connecting block, and the lower end is fixedly connected with the clamping column.
Further, the first sliding block comprises a first plane, a second plane and an arc surface; the upper end of the first spring is fixedly provided with a flat plate; the first plane initial state is positioned on the flat plate; the second plane in the initial state is contacted with the side wall of the first chute; the two ends of the arc surface are respectively and smoothly connected with the first plane and the second plane, so that when the first sliding block is positioned at the notch, the first sliding block can rotate by taking the joint of the first plane and the arc surface as the axis.
Further, the arc surface is a tooth surface structure; one side of the second sliding block, which is close to the first sliding groove, is provided with a tooth surface structure; the initial state of the second sliding block is positioned at the joint of the first sliding groove and the second sliding groove, so that when the first sliding block slides to the joint of the first sliding groove and the second sliding groove, the arc surface is meshed with the second sliding block.
Further, each clamping plate includes a first plate and a second plate; the first plate and the second plate are symmetrically arranged; the clamping block is located between the first plate and the second plate.
The beneficial effects of the invention are as follows: according to the planar flying probe testing device, the moving part, the fixed disc, the clamping set price and the probe are arranged, the lower surface of the clamping table is an inclined plane, when the probe is required to be installed, the clamping column of the probe is pushed upwards from the bottom of the clamping assembly, and then the clamping block drives the first sliding block to move upwards along the first sliding groove under the action of the pushing of the clamping column and the first sliding groove. When the first slider slides to the top of first spout, simultaneously because the ascending thrust of clamping column of effect messenger of clamping bench inclined plane has one and keeps away from the thrust of fixed disk direction, and then makes first slider slide in the second spout to make a plurality of clamping tables open, the clamping column passes the clamping bench, a plurality of clamping blocks reset, thereby make a plurality of clamping tables carry out the centre gripping to the clamping column, in order to reach the effect of easy to assemble probe.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of a planar flying probe testing device according to an embodiment of the present invention;
FIG. 2 is a schematic view of a clamping assembly of an embodiment of a planar flying probe testing device according to the present invention;
FIG. 3 is a front view of a clamping assembly of an embodiment of a planar flying probe testing device according to the present invention;
FIG. 4 is a schematic diagram showing the structural relationship between a clamping block and a clamping table of an embodiment of a planar flying probe testing device according to the present invention;
FIG. 5 is a schematic diagram showing the structural relationship between a clamping plate and a fixed disk of an embodiment of a planar flying probe testing device according to the present invention;
FIG. 6 is a front view of a clamping assembly of an embodiment of a planar flying probe testing device according to the present invention;
FIG. 7 is a cross-sectional view of a clamping assembly of an embodiment of a planar flying probe testing device according to the present invention;
FIG. 8 is a diagram illustrating another operational state of the clamping assembly of an embodiment of a planar flying probe testing device according to the present invention;
in the figure: 210. a frame; 220. a moving part; 240. a lifting part; 260. a mounting frame; 100. a clamping assembly; 111. a fixed plate; 121. a clamping table; 122. a clamping block; 123. a second slider; 124. a first slider; 131. pressing down the spring; 132. a main spring; 133. a first spring; 134. a second spring; 1211. a conical surface; 1212. an arc surface; 1213. a first plane; 1214. a second plane; 141. a first chute; 142. a second chute; 143. a notch; 144. a flat plate; 151. a connecting block; 152. a pushing block; 153. a sliding plate; 310. a needle; 320. and (5) clamping the column.
Detailed Description
The following description of the embodiments of the present invention 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 invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An embodiment of a planar flying probe testing device according to the present invention, as shown in fig. 1 to 8, includes a moving part 220, a fixed plate 111, a clamping set price, and a probe. The moving part 220 is provided to be freely movable in the horizontal direction. Specifically, the device further includes a frame 210, the moving part 220 is disposed on the frame 210, and a mounting rack 260 is disposed on the frame 210 for mounting the PCB. The moving part 220 is provided with a lifting part 240. The fixed disc 111 is horizontally arranged and connected with the moving part 220, and the fixed disc 111 is disc-shaped and fixedly connected with the lifting part 240 so as to be capable of moving up and down under the drive of the lifting part 240 and simultaneously freely moving in the horizontal direction under the drive of the moving part 220.
The clamping assembly 100 includes a plurality of clamping plates, a plurality of first sliders 124, a plurality of second sliders 123, a plurality of clamping blocks 122, and a plurality of clamping tables 121. The clamping plates are circumferentially and uniformly distributed below the fixed disc 111, and the clamping plates are mutually perpendicular to the fixed disc 111. The clamping plate is provided with a first chute 141 and a second chute 142, the first chute 141 is vertically arranged, the second chute 142 is horizontally arranged, and the first chute 141 and the second chute 142 are mutually vertical. The upper end of the first sliding groove 141 is mutually communicated with one end of the second sliding groove 142, which is close to the axis of the fixed disc 111, each first sliding block 124 is slidably arranged in one first sliding groove 141, each second sliding block 123 is slidably arranged in the second sliding groove 142, a second spring 134 is arranged between the second sliding block 123 and the second sliding groove 142, when the second sliding block 123 slides to one side far away from the axis of the fixed disc 111, the second spring 134 contracts and holds the force, the initial state of the second sliding block 123 is positioned at the communicating position of the first sliding block 124 and the second sliding groove 142, and when the first sliding block 124 and the second sliding block 123 are contacted and receive the pushing force far away from the axis of the fixed disc 111, the first sliding block 124 and the second sliding block 123 synchronously slide along the second sliding groove 142. In particular, each clamping plate comprises a first plate and a second plate, which are symmetrically arranged; the clamping block 122 is located between the first plate and the second plate. Each clamping block 122 is fixedly connected with one first sliding block 124, so that when the clamping blocks 122 move, the first sliding blocks 124 are driven to move.
Each clamping table 121 is fixedly arranged at the lower end of one clamping block 122, the upper end surface of the clamping table 121 extends towards the axial direction of the fixed plate relative to the clamping block 122, and specifically, the distance between the clamping table 121 and the axial line of the fixed plate 111 is smaller than the distance between the clamping block 122 and the axial line of the fixed plate 111. The lower end surface of the clamping table 121 is an inclined surface, and is configured to receive a thrust force in a direction away from the axis of the fixed disk 111 when the lower end surface receives an upward thrust force, and when the first slider 124 is positioned in the first sliding groove 141 and the clamping table 121 receives an upward thrust force, the clamping table 121 vertically moves upward along the first sliding groove 141, and when the first slider 124 rises to the top, the inclined surface of the clamping table 121 receives a component force away from the axis of the fixed disk 111, so that the clamping first slider 124 slides into the second sliding groove 142. The probe includes a tip 310 and a post 320; the initial state of the clamping column 320 is contacted with the inclined surfaces of the clamping blocks 122 at the same time, the radius of the clamping column 320 is smaller than the distance between the side wall of the clamping block 122, which is close to the axis of the fixed disc 111, and the clamping column 320 is columnar, and a frustum is arranged above the clamping column 320, so that the clamping tables 121 can be pushed away stably with the home when the clamping column 320 moves upwards. The needle 310 is vertically arranged, and the upper end is fixedly connected with the clamping block 122. Specifically, the moving part 220, the fixed disk 111, the clamping unit price, the lifting part 240 and the probe are two, and are symmetrically disposed on the upper and lower sides of the mounting frame 260.
In this embodiment, as shown in fig. 4 to 8, the lower end of the clamping post 320 is provided with a taper with a large diameter and a small diameter, the transverse edge of the upper end of the clamping table 121 near the axis of the fixed disc 111 is provided with a taper 1211, and the taper 1211 can be matched with the taper of the clamping post 320, so that when the clamping post 320 slides above the clamping table 121, the opposite surfaces of the clamping tables 121 clamp the taper of the clamping post 320. The cone at the lower end of the clamping post 320 and the cone 1211 of the clamping table 121 are matched with each other, so that the reliability of clamping the clamping post 320 by the clamping tables 121 can be improved.
In this embodiment, as shown in fig. 6 to 8, a pressing component is disposed between each clamping block 122 and the rotating disc, where the pressing component is configured to have downward pressure on the clamping block 122 when the clamping column 320 moves upward by a predetermined distance, so that the downward pressure of the pressing component on the clamping block 122 still exists when the clamping block 122 returns to the initial state, and the specific predetermined distance is when the clamping column 320 slides above the clamping table 121. The first sliding groove 141 is internally provided with a first spring 133, the lower end of the first spring 133 is connected with the bottom of the first sliding groove 141, the upper end of the first spring 133 is fixedly connected with the first sliding block 124, and when the initial position of the clamping block 122 is subjected to downward pressure, the first sliding block 124 compresses the first spring 133 downward, so that the first sliding block 124 moves downward. The lower side wall of the first sliding groove 141 is provided with a notch 143, and the notch 143 enlarges the moving space of the first sliding block 124, so that the first sliding block 124 is located at the position of the notch 143 of the first sliding groove 141 and can rotate, and the clamping block 122 can rotate around the first sliding block 124 as an axis. The initial position of the first slider 124 is located above the notch 143, so that when the clamping block 122 is pressed downward, the first slider 124 is driven to slide downward to the notch 143.
The pressing assembly includes a slide plate 153, a pressing spring 131, and a push block 152. The slide plate 153 is slidably provided on the lower surface of the fixed disk 111 in the radial direction. The upper end of the pressing spring 131 is connected with the sliding plate 153, and the lower end is fixedly connected with the clamping block 122. The initial state of the pressing spring 131 is in an inclined state so that the pressing spring 131 tends to be inclined in a vertical state when the sliding plate 153 slides to a side away from the axis of the fixed plate 111, and the pressing spring 131 is contracted by a distance left between both ends in a process of changing the inclination of the pressing spring 131 into a vertical state. The push block 152 is slidably disposed at the axis of the lower end of the fixed disc 111, and the push block 152 contacts with the sliding plate 153, so as to push the sliding plate 153 to slide to a side far away from the axis when the push block 152 slides upwards, and further drive the downward-pressing spring 131 to change the inclination angle; the push block 152 is connected to the catch 320. The push block 152 and the clamping post 320 are connected through an elastic component, and the elastic component comprises a main spring 132 and a connecting block 151. The connection block 151 is connected to the axial center of the fixed disk 111 in a vertically slidable manner, and the push block 152 is fixedly connected to the connection block 151. The upper end of the main spring 132 is fixedly connected with the connecting block 151, and the lower end is fixedly connected with the clamping column 320.
In this embodiment, as shown in fig. 3 and 4, the first slider 124 includes a first plane 1213, a second plane 1214, and an arc surface 1212. The upper end of the first spring 133 is fixedly provided with a flat plate 144, and the initial state of the first flat surface 1213 is located on the flat plate 144. The second plane 1214 contacts with the side wall of the first chute 141 in the initial state, two ends of the arc surface 1212 are respectively and smoothly connected with the first plane 1213 and the second plane 1214, so that when the first slider 124 is located at the notch 143, the first slider 124 can rotate around the joint of the first plane 1213 and the arc surface 1212, and when the arc surface contacts with the second slide, the second slider 123 can limit the rotation of the first slider 124. The arc surface 1212 is a tooth surface structure; the side of the second slider 123 near the first sliding groove 141 is a tooth surface structure, and the surface of the second slider 123 near the first sliding groove 141 is an inclined surface, when the first slider 124 and the second slider 123 are engaged, the second slider 123 prohibits the first slider 124 from rotating, so that when the first slider 124 is located at the communicating position between the first sliding groove 141 and the first sliding groove 141, the first slider 124 does not rotate. The initial state of the second slider 123 is located at the connection between the first sliding groove 141 and the second sliding groove 142, so that when the first slider 124 slides to the connection between the first sliding groove 141 and the second sliding groove 142, the circular arc surface 1212 is engaged with the second slider 123.
When in operation, the pressing spring 131 is in an initial inclined angle in an initial state and in an original long state, and the pressing spring 131 does not press the clamping block 122. The clamping post 320 is directly pushed from the lower direction of the clamping assembly 100 (as shown in fig. 6), because the first slider 124 is located above the notch 143 of the first sliding groove 141, the second plane 1214 is attached to the side wall of the first sliding groove 141, so that the first slider 124 cannot rotate. When the clamping post 320 continues to push upwards, the clamping table 121 and the clamping block 122 drive the first slider 124 to slide upwards along the first sliding groove 141 until the first slider 124 slides upwards until the top end of the first sliding groove 141, and at this time, the first slider 124 and the second slider 123 are engaged, and due to the upward pushing force of the clamping post 320 on the inclined surface of the clamping table 121, the clamping table 121 slides to a side far away from the axis of the fixed disk 111, and the first slider 124 pushes the second slider 123 to slide in the second sliding groove 142, so that the second spring 134 is compressed.
The clamping post 320 continues to push upwards to the lowest end and also passes over the clamping table 121, the clamping block 122 is not pushed any more, and the second spring 134 is released, so that the first slider 124 returns to the first sliding groove 141 again, and then the first slider 124 slides downwards when the pressing spring 131 is released. At this time, the cone of the clamping post 320 is attached to the conical surfaces 1211 of the four clamping tables 121, so that the clamping assembly 100 clamps the clamping post 320 to complete the installation and positioning of the clamping post 320. When the clamping post 320 slides to above the clamping table 121, the main spring 132 contacts with the clamping post 320 and receives the upward thrust of the clamping post 320, so that the main spring 132 is compressed, and the main spring 132 passes through the connecting block 151 and the plurality of pushing blocks 152, so that the plurality of sliding plates 153 slide to a side far from the axis of the fixed disc 111, and the pressing spring 131 moves towards a vertical state. When the pressing spring 131 becomes nearly vertical, there is downward pressure on the clamping block 122, and the first slider 124 further makes the first spring 133 contract downward, and the first slider 124 is located at the notch 143 of the first chute 141, so that the clamping block 122 has a rotation tendency, and the probe installation is completed.
When the flying probe tester is operating normally, the clamping assembly 100 is driven by the moving part 220 and the lifting part 240 to move up and down continuously to contact different positions of the PCB. The mating of the tapered surfaces 1211 ensures high precision before the tip 310 of the probe contacts the PCB, and the main spring 132 cushions the tip 310 from the impact after the tip 310 contacts the PCB. When the protrusion at a certain position of the PCB is higher, the distance of upward movement of the needle 310 increases, so as to drive the card post 320 to move upward synchronously, and the power of the main spring 132 increases, so that the clamping block 122 rotates around the tangential position between the first slider 124 and the flat plate 144 (as shown in fig. 8) due to the first slider 124 being located at the notch 143. The plurality of clamping blocks 122 can clamp the clamping columns 320 of the probes, and simultaneously, the resistance applied to the clamping columns 320 when the main springs 132 rebound is increased, so that the collision between the probes and the clamping assembly 100 is reduced, the friction is reduced, and the test precision of the verification probes is improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (2)
1. A plane type flying probe testing device is characterized in that: comprising the following steps:
a moving part which can be freely moved along the horizontal direction;
the fixed disc is horizontally arranged and connected with the moving part;
the clamping assembly comprises a plurality of clamping plates, a plurality of first sliding blocks, a plurality of second sliding blocks, a plurality of clamping blocks and a plurality of clamping tables; the clamping plates are circumferentially arranged below the fixed disc, and a first chute and a second chute are arranged on the clamping plates; the first sliding groove is vertically arranged, the second sliding groove is horizontally arranged, and the upper end of the first sliding groove is communicated with one end, close to the axis of the fixed disc, of the second sliding groove; each first sliding block is slidably arranged in one first sliding groove; each second sliding block is slidably arranged in the second sliding groove, and a second spring is arranged between the second sliding block and the second sliding groove; each clamping block is fixedly connected with two first sliding blocks; each clamping table is fixedly arranged at the lower end of one clamping block, and the upper end face of the clamping table extends towards the axial direction of the fixing plate relative to the clamping block; the lower end surface of the clamping table is an inclined surface and is configured to receive a split thrust in the direction away from the axis of the fixed disc when the lower end surface receives an upward thrust;
the probe comprises a needle head and a clamping column; the initial state of the clamping column is contacted with the inclined surfaces of the clamping blocks at the same time, and the radius of the clamping column is smaller than the distance between the clamping blocks and the axis of the fixed disc; the needle is vertically arranged, the upper end of the needle is fixedly connected with the clamping column, and the lower end of the clamping column is provided with a cone with a large diameter at the upper part and a small diameter at the lower part; the upper end of the clamping table is provided with a conical surface close to the transverse edge of one side of the axis of the fixed disc, the conical surface can be matched with the conical surface of the clamping column, so that when the clamping column slides to the upper part of the clamping table, the conical surfaces of the clamping tables clamp the conical surface of the clamping column, and a pressing component is arranged between each clamping block and the rotating disc; the pressing component is used for pressing the clamping block downwards when the clamping column moves upwards for a preset distance; a first spring is arranged in the first chute; the lower end of the first spring is connected with the bottom of the first chute; a notch is arranged on the side wall of the lower end of the first chute; the first sliding block can rotate when being positioned at the notch position of the first sliding groove; the initial position of the first sliding block is positioned above the notch, so that the first sliding block is driven to slide downwards to the notch when the clamping block is subjected to downward pressure;
the pressing component comprises a sliding plate, a pressing spring and a pushing block; the sliding plate is arranged on the lower surface of the fixed disc in a sliding way along the radial direction; the upper end of the downward pressing spring is connected with the sliding plate, and the lower end of the downward pressing spring is fixedly connected with the clamping block; the initial state of the pressing spring is in an inclined state, so that the pressing spring tends to move in a vertical state when the sliding plate slides to one side far away from the axis of the fixed disc; when the downward spring is nearly vertical, downward pressure is applied to the clamping block; the pushing block is arranged at the axle center of the lower end of the fixed disc in a vertically sliding way, and is contacted with the sliding plate so as to push the sliding plate to slide to one side far away from the axle center when the pushing block slides upwards; the pushing block is connected with the clamping column,
the pushing block is connected with the clamping column through an elastic component; the elastic component comprises a main spring and a connecting block; the connecting block can be connected with the axle center of the fixed disc in an up-and-down sliding way; the pushing block is fixedly connected with the connecting block; the upper end of the main spring is fixedly connected with the connecting block, the lower end is contacted with the clamping column,
the first sliding block comprises a first plane, a second plane and an arc surface; the upper end of the first spring is fixedly provided with a flat plate; the first plane initial state is positioned on the flat plate; the second plane in the initial state is contacted with the side wall of the first chute; two ends of the arc surface are respectively and smoothly connected with the first plane and the second plane, when the first sliding block is positioned at the notch, the first sliding block can rotate by taking the joint of the first plane and the arc surface as the axis,
the arc surface is a tooth surface structure; one side of the second sliding block, which is close to the first sliding groove, is provided with a tooth surface structure; the initial state of the second sliding block is positioned at the joint of the first sliding groove and the second sliding groove, so that when the first sliding block slides to the joint of the first sliding groove and the second sliding groove, the arc surface is meshed with the second sliding block; when the bulge at a certain position of the PCB is higher, the upward moving distance of the needle head is increased, so that the clamping column is driven to synchronously move upwards, the power storage of the main spring is increased, and the clamping block rotates by taking the tangential position between the first sliding block and the flat plate as the axis because the first sliding block is positioned at the notch; when the clamping blocks clamp the clamping columns of the probes, the resistance applied to the clamping columns when the main springs rebound is increased, so that the collision between the probes and the clamping assemblies is reduced, friction is reduced, and the testing precision of the probes is ensured.
2. A planar flying probe testing device according to claim 1, wherein:
each clamping plate comprises a first plate and a second plate; the first plate and the second plate are symmetrically arranged; the clamping block is located between the first plate and the second plate.
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