CN111830397A - PCB board signal loss test fixture - Google Patents
PCB board signal loss test fixture Download PDFInfo
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- CN111830397A CN111830397A CN202010694440.7A CN202010694440A CN111830397A CN 111830397 A CN111830397 A CN 111830397A CN 202010694440 A CN202010694440 A CN 202010694440A CN 111830397 A CN111830397 A CN 111830397A
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- 238000012360 testing method Methods 0.000 title claims abstract description 67
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- 238000009434 installation Methods 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 239000011135 tin Substances 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 229910001285 shape-memory alloy Inorganic materials 0.000 abstract description 37
- 238000010586 diagram Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- -1 i.e. Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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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]
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
- Tests Of Electronic Circuits (AREA)
Abstract
The invention provides a PCB (printed circuit board) signal loss test fixture, which comprises an SMA (shape memory alloy) joint, an upper pressing plate, a lower pressing plate and a pressing and fastening mechanism, wherein the SMA joint is provided with an SMA connector; the upper pressing plate is provided with a mounting through hole, and the SMA joint is vertically mounted on the upper pressing plate through the mounting through hole; the SMA connector is provided with a mounting flange, at least two flange mounting holes are arranged on the mounting flange, limiting columns are arranged on at least two flange mounting holes, and each limiting column is coaxially distributed with the flange mounting hole on which the limiting column is arranged; the parts of the limiting columns, which are positioned below the mounting flange, are positioned below the upper pressure plate; the lower pressing plate is provided with a limiting hole matched with each limiting column; when the PCB test board is pressed between the upper pressing plate and the lower pressing plate, each limiting column respectively penetrates through the corresponding limiting hole; after the pressing state of the pressing and fastening mechanism is released, the pressing and fastening mechanism can be taken down from the upper pressing plate and the lower pressing plate. The invention is used for improving the efficiency of testing the signal loss of the board card.
Description
Technical Field
The invention relates to the field of board card signal loss testing tools, in particular to a PCB board card signal loss testing jig.
Background
In the research and development process of high-end high-performance servers, storage devices, switches and the like, the signal loss of the PCB is often tested.
In the existing test of the signal loss of the PCB board card, the SMA head is fixed on the PCB test board by using a screw, and the installation mainly depends on the fixation of the screw. However, the screw fixing needs to be performed by fastening the screw with a corresponding auxiliary tool, and thus, a relatively large amount of time is required, thereby reducing the testing efficiency. In addition, when different test points on the same PCB board are tested, the screws need to be detached by using corresponding auxiliary tools, and then the screws need to be mounted on other test points by using the corresponding auxiliary tools, which is relatively inefficient.
Therefore, the invention provides a PCB card signal loss test fixture for solving the problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a PCB (printed circuit board) card signal loss test fixture which is used for realizing tool-free installation of an SMA (shape memory alloy) head in a PCB board signal loss test and realizing quick replacement of different test points of a PCB test board.
The invention provides a PCB card signal loss test fixture, which comprises an SMA connector, an upper pressing plate and a lower pressing plate, wherein the upper pressing plate and the lower pressing plate are used for clamping a PCB test board;
the upper pressing plate is provided with a mounting through hole, and the SMA joint is vertically mounted on the upper pressing plate through the mounting through hole; the SMA connector is provided with a mounting flange, at least two flange mounting holes are arranged on the mounting flange, limiting columns are arranged on at least two flange mounting holes, and each limiting column is coaxially distributed with the flange mounting hole on which the limiting column is arranged; the parts of the limiting columns, which are positioned below the mounting flange, are positioned below the upper pressure plate;
the lower pressing plate is provided with limiting holes matched with the limiting columns for use, and the limiting holes are equal in number and correspond to the limiting columns one by one;
when the PCB test board is pressed between the upper pressing plate and the lower pressing plate, each limiting column respectively penetrates through the corresponding limiting hole; after the pressing state of the pressing and fastening mechanism is released, the pressing and fastening mechanism can be taken down from the upper pressing plate and the lower pressing plate.
Furthermore, the pressing and fastening mechanism comprises a limiting nut, a connecting rod with a handle connecting part and a handle with an eccentric wheel connecting part, and the eccentric wheel connecting part and the handle connecting part are rotatably connected through a rotating shaft;
one end of the connecting rod, which is far away from the handle connecting part, is provided with an external thread, and the limiting nut is in threaded connection with the external thread of the connecting rod;
two opposite ends of the upper pressure plate are provided with first U-shaped grooves, two opposite ends of the lower pressure plate are provided with second U-shaped grooves, and the first U-shaped grooves on the upper pressure plate are opposite to the second U-shaped grooves on the lower pressure plate; the first U-shaped groove, the second U-shaped groove and the space enclosed between the first U-shaped groove and the second U-shaped groove are opposite in position and used for placing a connecting rod of the pressing and fastening mechanism, a limiting nut of the pressing and fastening mechanism is located below the lower pressing plate, a handle of the pressing and fastening mechanism is located above the upper pressing plate, and the edge of an eccentric wheel connecting portion on the handle of the pressing and fastening mechanism is matched with the upper end face of the upper pressing plate for use.
Further, the eccentric wheel connecting part comprises two eccentric wheels which are matched with each other, the two eccentric wheels are opposite in position, and the handle connecting part is rotatably arranged between the two eccentric wheels through a rotating shaft.
Furthermore, the pressing and fastening mechanism is made of any one of five metal materials of gold, silver, copper, iron and tin.
Further, the number of SMA joints is two, the number of mounting through holes is two, and the number of limiting holes is two.
Furthermore, the upper pressing plate is of a double-layer structure and comprises an upper pressing plate and a lower pressing plate, a flange embedding hole for embedding an installation flange of the SMA connector is formed in the lower pressing plate, a connector through hole which is matched with the flange embedding hole for use and penetrates out of the SMA connector is formed in the upper pressing plate, the number of the connector through holes is equal to that of the flange embedding holes, and the connector through holes are opposite in position;
when the upper laminated plate is stacked above the lower laminated plate, the joint through holes and the corresponding flange embedding holes are communicated to form the mounting through holes, and the tops of the limiting columns are propped against the upper laminated plate.
Furthermore, one end of the limiting column is provided with a threaded connecting column, and the limiting column is in threaded connection with the corresponding flange mounting hole through the threaded connecting column respectively.
The beneficial effect of the invention is that,
the PCB board signal loss test fixture provided by the invention avoids the use of an external mounting tool, is convenient to mount and dismount, and is beneficial to improving the PCB board signal loss test efficiency to a certain extent.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic usage state structure diagram of a PCB board signal loss test fixture according to an embodiment of the present invention.
Fig. 2 is a schematic configuration diagram of the press fastening mechanism shown in fig. 1.
Fig. 3 is a schematic structural view of the upper platen shown in fig. 1.
Fig. 4 is a schematic block diagram of the SMA joint, spacing post, and upper platen shown in fig. 1.
Fig. 5 is a schematic exploded view of the SMA joint, retaining posts, and upper platen shown in fig. 1.
Fig. 6 is a schematic block diagram of the upper and lower platens shown in fig. 1.
Fig. 7 is a schematic structural diagram of a stitching adjustment state of the PCB board signal loss test fixture shown in fig. 1.
Fig. 8 is a schematic exploded view of fig. 1 with the PCB test board and the press fit mechanism removed.
Wherein: 1. the SMA connector comprises 1.1 parts of an SMA connector, 1.1 parts of mounting flanges, 1.1.1 parts of flange mounting holes, 2 parts of a pressing and fastening mechanism, 2.1 parts of handles, 2.1.1 parts of eccentric wheel connecting parts, 2.1.1 parts of first eccentric wheels, 2.1.1.2 parts of second eccentric wheels, 2.2 parts of connecting rods, 2.2.1 parts of handle connecting parts, 2.3 parts of limiting nuts, 2.4 parts of rotating shafts; 3. the device comprises an upper pressing plate, 3.1 installation through holes, 3.2 first U-shaped grooves, 3.3 upper pressing plates, 3.3.1 connector through holes, 3.4 lower pressing plates, 3.4.1 flange embedding holes, 4 lower pressing plates, 4.1 limiting holes, 4.2 second U-shaped grooves; 5. a limiting column, 5.1, a threaded connecting column; 6. PCB test board, 7, contact pin.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1-8 are diagrams illustrating an embodiment of the PCB board signal loss testing jig of the present invention, wherein the PCB test board 6 is removed in fig. 1, which is a schematic structural diagram of the PCB board signal loss testing jig.
Referring to fig. 1, the PCB board signal loss test fixture of the present invention includes an SMA connector 1, an upper pressing plate 3 and a lower pressing plate 4 for clamping a PCB test board 6, and two pressing and fastening mechanisms 2 for pressing the upper pressing plate 3 and the lower pressing plate 4. The upper pressure plate 3 is provided with a mounting through hole 3.1. The SMA connector 1 is vertically installed on the upper pressure plate 3 through the installation through hole 3.1. The SMA joint 1 is provided with a mounting flange. And two flange mounting holes are formed in the mounting flange. And the two flange mounting holes are provided with limiting columns 5. Each limiting column 5 is coaxially distributed with the flange mounting hole in which the limiting column is installed. The parts of the limiting columns 5, which are positioned below the mounting flanges, are positioned below the upper pressure plate 3. The lower pressing plate 4 is provided with a limit hole 4.1 matched with each limit column 5 for use. The limiting holes 4.1 are equal in number and correspond to the limiting columns 5 one by one. When the PCB test board 6 is pressed between the upper pressing plate 3 and the lower pressing plate 4, each limiting column 5 respectively penetrates through the corresponding limiting hole 4.1. After the press-fit state of the press-fit mechanism 2 is released, the press-fit mechanism 2 can be removed from the upper platen 3 and the lower platen 4.
In this embodiment, the number of the SMA joints 1 is two, and the two SMA joints 1 are used in cooperation, and when in use, one of the SMA joints is used for inputting a test signal, and the other SMA joint is used for outputting the test signal. Corresponding to the number of the SMA joints 1, the number of the mounting through holes 3.1 is two, and the number of the limiting holes 4.1 is two, as shown in FIG. 1.
When the test device is used, the PCB test board 6 is placed between the upper press plate 3 and the lower press plate 4, each limit column 5 firstly penetrates through a corresponding locating hole 6.1 (which can be preset) on the PCB test board 6 and then is inserted into a corresponding limit hole 4.1 on the lower press plate 4, the PCB test board cannot slide out from the upper press plate 3 and the lower press plate 4 at the moment, then the pressing and fastening mechanism 2 is adjusted, the upper press plate 3 and the lower press plate 4 are pressed together, the PCB test board is positioned between the upper press plate 3 and the lower press plate 4 at the moment, a contact pin 7 of the two SMA joints 1, which is used for transmitting a test signal, is matched with two points to be tested on the PCB test board, one of the two points is used for inputting the test signal, the other one is used for outputting the test signal, and then the two points to be used. When needs are dismantled, the adjustment is pressed and is pressed straining mechanism 2 and loosen the pressfitting between top board 3 and the lower pressure plate 4, can will press and strain mechanism 2 and take off from top board 3 and lower pressure plate 4, can deposit this moment also can change the test point and continue to test the test point on the PCB survey test board. Therefore, the use of external auxiliary tools and mounting screws is avoided, the mounting and dismounting are convenient, and the test efficiency is improved to a certain extent.
It should be noted that, if only one SMA connector 1 is disposed on the PCB card signal loss test fixture, two PCB card signal loss test fixtures may be used in cooperation, one for inputting test signals to the PCB test board, and the other for outputting test signals to the PCB test board.
Optionally, as an embodiment of the present invention, the pressing and fastening mechanism 2 includes a limit nut 2.3, a connecting rod 2.2 with a handle connecting portion 2.2.1, and a handle 2.1 with an eccentric connecting portion 2.1.1, and the eccentric connecting portion 2.1.1 and the handle connecting portion 2.2.1 are rotatably connected through a rotating shaft 2.4. Keep away from on connecting rod 2.2 the one end of handle connecting portion 2.2.1 has the external screw thread, and stop nut 2.3 threaded connection is on the external screw thread of connecting rod 2.2. The two opposite ends of the upper pressing plate 3 are provided with first U-shaped grooves 3.2, the two opposite ends of the lower pressing plate 4 are provided with second U-shaped grooves 4.2, and the first U-shaped grooves 3.2 of the upper pressing plate 3 are opposite to the second U-shaped grooves 4.2 of the lower pressing plate 4. The first U-shaped groove 3.2, the second U-shaped groove 4.2 and the space enclosed by the two grooves are opposite to each other and used for placing the connecting rod 2.2 of the pressing and fastening mechanism 2; the limiting nut 2.3 of the pressing and fastening mechanism 2 is positioned below the lower pressing plate 4, and the handle 2.1 of the pressing and fastening mechanism 2 is positioned above the upper pressing plate 3. The edge of an eccentric wheel connecting part 2.1.1 on a handle 2.1 of the pressing and fastening mechanism 2 is matched with the upper end surface of the upper pressing plate 3 for use, so that the pressing and loosening between the upper pressing plate 3 and the lower pressing plate 4 can be adjusted.
Specifically, eccentric wheel connecting portion 2.1.1 has the spacing face of pressfitting and loosens the spacing face of pressfitting, wherein: when the upper pressing plate 3 and the lower pressing plate 4 are pressed, the limiting nut 2.3 can be screwed into a proper position along the direction towards the lower pressing plate 4 manually, and then the two handles 2.1 are shifted according to the pressing directions indicated by arrows a and B in fig. 7 until the pressing limiting surfaces of the eccentric wheel connecting parts 2.1.1 of the two handles 2.1 are attached to the upper end surface of the upper pressing plate 3 (at this time, the handles are shifted to the maximum stroke position according to the pressing directions indicated by the arrows a and B in fig. 7); when the pressing between the upper pressing plate 3 and the lower pressing plate 4 needs to be loosened, the two handles 2.1 can be reversely stirred to enable the loosening pressing limiting surfaces of the eccentric wheel connecting parts 2.1.1 of the two handles 2.1 to be attached to the upper end surface of the upper pressing plate 3 (at the moment, the handles 2.1 are reversely stirred to be located in the vertical direction of the upper pressing plate 3, as shown in fig. 7), then the limiting nuts 2.3 are manually rotated away from the lower pressing plate 4 slightly, and the pressing fastening mechanism 2 can be taken down from the upper pressing plate 3 and the lower pressing plate 4. The whole process avoids the use of external auxiliary tools and mounting screws, the mounting and dismounting are convenient, the cost is reduced to a certain degree, and the testing efficiency is improved.
Optionally, as an embodiment of the invention, the eccentric connection 2.1.1 comprises two eccentrics: a first eccentric 2.1.1.1 and a second eccentric 2.1.1.2, which are used in conjunction and are located opposite one another, between which the handle connecting part 2.2.1 is rotatably mounted via a rotary shaft 2.4. Each eccentric wheel is provided with a pressing limiting surface and a loosening pressing limiting surface, the pressing limiting surface of the eccentric wheel connecting part 2.1.1 is formed by the pressing limiting surfaces of the two eccentric wheels, and the loosening pressing limiting surface of the eccentric wheel connecting part 2.1.1 is formed by the loosening pressing limiting surfaces of the two eccentric wheels.
Alternatively, as an embodiment of the present invention, the pressing and fastening mechanism 2 may be made of any one of five metal materials, i.e., gold, silver, copper, iron, and tin, and in this embodiment, iron is selected for use, so as to reduce the cost.
Optionally, as an embodiment of the present invention, the upper pressure plate 3 adopts a double-layer structure, and includes an upper pressure plate 3.3 and a lower pressure plate 3.4, the lower pressure plate 3.4 is provided with a flange embedding hole for embedding the mounting flange of the SMA joint 1, the upper pressure plate 3.3 is provided with joint via holes used in cooperation with the flange embedding hole and used for penetrating through the SMA joint 1, and the number of the joint via holes is equal to the number of the flange embedding holes, and the joint via holes are opposite to the positions of the flange embedding holes. When the upper laminated plate 3.3 is laminated above the lower laminated plate 3.4, the joint through holes and the corresponding flange embedding holes are communicated to form the mounting through holes 3.1, and the top of each limiting column 5 is propped against the upper laminated plate 3.3. It can be seen that in this embodiment, when the SMA connector 1 is assembled, the mounting flange of the SMA connector 1 can be held by hand, and the SMA connector 1 sequentially passes through the flange embedding hole and the connector via hole on the upper pressure plate 3 until abutting against the upper pressure plate 3 of the upper pressure plate 3. The installation is convenient, and an external installation auxiliary tool is not needed in the whole installation process. The number of the flange embedding holes is equal to that of the SMA joints 1, each SMA joint 1 is provided with one mounting flange, and the flange embedding holes are equal to the mounting flanges in number and opposite in position. Each flange embedding hole is used for embedding a corresponding mounting flange. In this embodiment, the number of the flange fitting holes is two.
Optionally, as an embodiment of the present invention, one end of the limiting column 5 is provided with a threaded connecting column 5.1, and the limiting column 5 is respectively in threaded connection with the corresponding flange mounting hole through the threaded connecting column 5.1. The limiting column 5 is installed on the installation flange in a threaded connection mode, and the limiting column 5 is convenient to replace regularly to increase the use reliability.
It should be noted that the dimensions of the upper platen 3 and the lower platen 4 can be adjusted according to actual needs; when the thickness of the board card to be tested is changed, the position of the connecting rod 2.2 can be adjusted by replacing the connecting rod 2.2 with different lengths or adjusting the position of the limiting nut 2.3 on the connecting rod 2.2; when the size of the PCB test board or the position of the test point is changed, the size of the upper pressing plate 3 and the lower pressing plate 4 can be adjusted, the position of each SMA connector 1 can be adjusted, and even the stability can be ensured by increasing or reducing the pressing fastening mechanism 2. The invention has simple structure and convenient and quick operation, and is beneficial to accelerating the multi-point test of the signal loss of the PCB.
It should be noted that, in the present specification, similar or corresponding portions may be referred to each other. The directional terms in this specification are based on fig. 1.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A PCB card signal loss test fixture comprises an SMA connector (1), and is characterized by also comprising an upper pressing plate (3) and a lower pressing plate (4) which are used for clamping a PCB test board (6), and two pressing and fastening mechanisms (2) which are used for pressing the upper pressing plate (3) and the lower pressing plate (4);
the upper pressing plate (3) is provided with an installation through hole (3.1), and the SMA joint (1) is vertically installed on the upper pressing plate (3) through the installation through hole (3.1); the SMA connector (1) is provided with a mounting flange, at least two flange mounting holes are formed in the mounting flange, limiting columns (5) are arranged on at least two flange mounting holes, and each limiting column (5) is coaxially distributed with the flange mounting hole on which the limiting column is mounted; the parts of the limiting columns (5) which are positioned below the mounting flanges are all positioned below the upper pressure plate (3);
the lower pressing plate (4) is provided with limiting holes (4.1) matched with the limiting columns (5) for use, and the limiting holes (4.1) are equal in number and correspond to the limiting columns (5) one by one;
when the PCB test board (6) is pressed between the upper pressing plate (3) and the lower pressing plate (4), each limiting column (5) respectively penetrates through the corresponding limiting hole (4.1); after the pressing state of the pressing and fastening mechanism (2) is released, the pressing and fastening mechanism (2) can be taken down from the upper pressing plate (3) and the lower pressing plate (4).
2. The PCB board signal loss test fixture according to claim 1, wherein the pressing and fastening mechanism (2) comprises a limit nut (2.3), a connecting rod (2.2) with a handle connecting part (2.2.1) and a handle (2.1) with an eccentric wheel connecting part (2.1.1), and the eccentric wheel connecting part (2.1.1) and the handle connecting part (2.2.1) are rotatably connected through a rotating shaft (2.4);
one end of the connecting rod (2.2) far away from the handle connecting part (2.2.1) is provided with an external thread, and the limiting nut (2.3) is in threaded connection with the external thread of the connecting rod (2.2);
two opposite ends of the upper pressing plate (3) are provided with first U-shaped grooves (3.2), two opposite ends of the lower pressing plate (4) are provided with second U-shaped grooves (4.2), and the first U-shaped grooves (3.2) on the upper pressing plate (3) are opposite to the second U-shaped grooves (4.2) on the lower pressing plate (4); the first U-shaped groove (3.2), the second U-shaped groove (4.2) that the position is relative and the space that encloses between the two is used for placing connecting rod (2.2) of pressing the straining device (2), press stop nut (2.3) of straining device (2) and be located the below of holding down plate (4), press handle (2.1) of straining device (2) and be located the top of holding down plate (3), press the edge of eccentric wheel connecting portion (2.1.1) on handle (2.1) of straining device (2) and the up end cooperation of holding down plate (3) and use.
3. The PCB board signal loss test fixture of claim 2, wherein the eccentric wheel connecting part (2.1.1) comprises two eccentric wheels which are used in cooperation, the two eccentric wheels are opposite in position, and the handle connecting part (2.2.1) is rotatably mounted between the two eccentric wheels through a rotating shaft (2.4).
4. The PCB board signal loss test fixture according to claim 1, 2 or 3, wherein the pressing and fastening mechanism (2) is made of any one of five metal materials, i.e. gold, silver, copper, iron and tin.
5. The PCB board card signal loss test fixture according to claim 1, 2 or 3, wherein the number of the SMA joints (1) is two, the number of the mounting through holes (3.1) is two, and the number of the limiting holes (4.1) is two.
6. The PCB board signal loss test fixture according to claim 1, 2 or 3, characterized in that the upper press plate (3) adopts a double-layer structure and comprises an upper press plate (3.3) and a lower press plate (3.4), the lower press plate (3.4) is provided with a flange embedding hole for embedding the mounting flange of the SMA connector (1), the upper press plate (3.3) is provided with connector through holes which are matched with the flange embedding hole for use and are used for penetrating out of the SMA connector (1), and the connector through holes are equal in number and opposite in position to the flange embedding holes;
when the upper laminated plate (3.3) is stacked above the lower laminated plate (3.4), the joint through holes and the corresponding flange embedding holes are communicated to form the mounting through holes (3.1), and the top of each limiting column (5) is propped against the upper laminated plate (3.3).
7. The PCB board signal loss test fixture according to claim 6, wherein one end of the limiting column (5) is provided with a threaded connecting column, and the limiting column (5) is in threaded connection with the corresponding flange mounting hole through the threaded connecting column respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010694440.7A CN111830397A (en) | 2020-07-17 | 2020-07-17 | PCB board signal loss test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010694440.7A CN111830397A (en) | 2020-07-17 | 2020-07-17 | PCB board signal loss test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111830397A true CN111830397A (en) | 2020-10-27 |
Family
ID=72923618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010694440.7A Withdrawn CN111830397A (en) | 2020-07-17 | 2020-07-17 | PCB board signal loss test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111830397A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986867A (en) * | 2021-02-25 | 2021-06-18 | 保定腾远电力科技有限公司 | Transformer winding deformation tester |
| CN113625157A (en) * | 2021-08-30 | 2021-11-09 | 浪潮商用机器有限公司 | Circuit board detection device |
-
2020
- 2020-07-17 CN CN202010694440.7A patent/CN111830397A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986867A (en) * | 2021-02-25 | 2021-06-18 | 保定腾远电力科技有限公司 | Transformer winding deformation tester |
| CN112986867B (en) * | 2021-02-25 | 2022-05-03 | 保定腾远电力科技有限公司 | Transformer winding deformation tester |
| CN113625157A (en) * | 2021-08-30 | 2021-11-09 | 浪潮商用机器有限公司 | Circuit board detection device |
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Application publication date: 20201027 |
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| WW01 | Invention patent application withdrawn after publication |