A power amplifier test device

Abstract

The present invention provides a power amplifier test device, which includes a frame-shaped body. A drawing device is provided on the frame-shaped body. A locking device is provided at one end of the drawing device that advances into the frame-shaped body. After the drawing device advances into the frame-shaped body, the locking device locks and fixes the drawing device. A floating lower mold is provided on the drawing device, and the floating lower mold is used to carry the board to be tested. This device positions the PCB board in the form of upper and lower templates to prevent the movement of the PCB board. By setting a floating lower mold, it ensures accurate positioning when the upper and lower molds are inserted, eliminates the inaccuracy of the position caused by the error between the upper and lower molds, which may lead to inaccurate alignment of the plug connectors. At the same time, a fine-tuning floating structure is also provided inside the plug connectors, which can avoid the error of each plug connector while ensuring accurate position in the general direction, eliminating the inaccuracy caused by the assembly error of the tooling, greatly improving the stability when inserting the plug connectors and increasing the service life of the pins.

Description

Technical Field

[0001] The present invention relates to the field of test tooling, and particularly to a power amplifier test device. Background Art

[0002] The power amplifier is one of the very important components in the radio frequency communication system. Similar to other amplifiers, the radio frequency power amplifier (RF power amplifier) amplifies the signal input to its input terminal. The RF power amplifier is a key component in the communication base station, and its performance needs to be evaluated from multiple different dimensions such as gain, efficiency, and linearity. Its detection is carried out by positioning the PCB board and then connecting different testers to test the radio frequency indicators. Usually, a specific tooling is required for connection testing. The characteristics that the tooling should have are high precision requirements. Since there are many connection ports on the PCB board, it is necessary to test after docking one by one through multiple connectors. However, the existing tooling generally has low precision, and it is easy to have inaccurate alignment during the interface docking, resulting in the breakage of the insertion pins. However, due to the large number of parts, it is difficult to determine which specific part has an error in the problem of inaccurate alignment, resulting in difficulty in determining the position of the repair parts. Therefore, the damage rate of the test insertion pins is relatively high, the replacement is frequent, and there will also be problems of damaging the board under test. Summary of the Invention

[0003] To solve the above technical problems, the present invention proposes a power amplifier test device, including a frame-shaped body. A drawing device is provided on the frame-shaped body. A locking device is provided at one end of the frame-shaped body where the drawing device is pushed. After the drawing device is pushed into the frame-shaped body, the locking device locks and fixes the drawing device.

[0004] A floating lower mold is provided on the drawing device, and the floating lower mold is used to carry the board under test.

[0005] A pressing module is provided at the top of the frame-shaped body. The lower part of the pressing module is connected with an upper template. At least one pressing cylinder is arranged in an array on the upper template. The output end of the pressing cylinder is connected with a lifting plate. A plurality of insertion connectors are arranged in an array on the lifting plate. The end of the insertion connector passes through the upper template and presses on the board under test.

[0006] The insertion connector includes a cylindrical shell passing through and fixed on the lifting plate. A polygonal block is provided at the end of the cylindrical shell. The polygonal block passes through the upper template. A cavity is provided in the polygonal block. A plurality of first elastic pieces are arranged in a circular array in the cavity. A hollow cylindrical part is provided at the center of the cavity. A plurality of second elastic pieces are arranged in a circular array in the hollow cylindrical part. The first elastic pieces are used to center the cylindrical shell and have a floating effect.

[0007] A pin assembly is engaged between the first elastic pieces arranged in a circumferential manner. The pin assembly includes a cylinder body, and a first ring sleeve structure and a second ring sleeve structure are respectively provided at the end portions of the cylinder body. A pin is disposed through the centers of the first ring sleeve structure and the second ring sleeve structure, and an elastic ring is provided between the pin and the cylinder body;

[0008] The first ring sleeve structure is clamped within the first elastic piece. Meanwhile, the pin within the first ring sleeve structure is inserted between the second elastic pieces. The ring sleeve structure on the other side is used to dock with the board to be tested, and the second elastic piece is used to center the pin and has a floating function.

[0009] Preferably, the first elastic piece includes an arc segment and a bent segment. The bending direction of the bent segment points to the second ring sleeve structure. The mouth of the cavity bends inward, and the end portion of the bent segment presses against the mouth of the cavity.

[0010] Preferably, a side push cylinder is provided at the edge of the upper template. The output end of the side push cylinder is connected to a side push plate. A floating plug is provided on the side push plate, and the floating plug points between the upper template and the floating lower die.

[0011] Preferably, the floating plug includes at least one positioning and guiding plate passing through the side push plate. A first gap is provided between the positioning and guiding plate and the side push plate. A number of locking pins pass through the positioning and guiding plate, and the ends of the locking pins are fixed on the side push plate. A second gap is provided between the locking pins and the positioning and guiding plate, and an elastic member is provided between the ends of the locking pins and the positioning and guiding plate; A detection pin group is fixed at the center of the positioning and guiding plate.

[0012] Preferably, a guiding wedge block is provided at one end of the positioning and guiding plate pointing to the floating lower die.

[0013] Preferably, a positioning and guiding pin is provided between the upper template and the floating lower die.

[0014] Preferably, a number of module partitions are provided on the opposite surfaces of the upper template and the floating lower die. Convex ribs are provided around the module partitions, and a soft glue layer is provided on the convex ribs.

[0015] Preferably, a fixing plate is provided on the pulling device. At least two groups of positioning pins are provided on the fixing plate. The positioning pins pass through the floating lower die, and a plain bearing is provided on the positioning pins between the floating lower die and the fixing plate.

[0016] Preferably, a number of empty slots are provided on the floating lower die, and a heat dissipation plate is elastically locked at the empty slots.

[0017] Preferably, the drawing device includes a sliding plate and side plates symmetrically arranged on both sides inside the frame-shaped body. The side plates are provided with chute components, the sliding plate is connected to the chute components, and sensors are provided at the ends of the chute components. The locking device includes a rotary cylinder fixed at the end of the track. When the rotary cylinder is activated, the pressing block hooks on the end of the fixing plate.

[0018] The beneficial effects of the power amplifier test equipment proposed in this solution are as follows: The device positions the PCB board in the form of an upper floating lower mold to prevent the movement of the PCB board. Then, by setting a floating lower mold, it ensures accurate positioning when the upper and lower molds are inserted, eliminating the inaccuracy in position caused by the error between the upper and lower molds, which may lead to inaccurate alignment of the plug connectors. At the same time, a fine-tuning floating structure is also set inside the plug connectors to ensure that even when the position is accurate in the general direction, the error of each plug connector can be avoided, eliminating the inaccuracy caused by the assembly error of the tooling, greatly improving the stability when inserting the plug connectors, and extending the service life of the pins. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments.

[0020] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the frame-shaped body of the present invention;

[0022] Figure 3 It is a schematic diagram of the internal structure of the frame-shaped body of the present invention;

[0023] Figure 4 It is a schematic diagram of the drawing device of the present invention;

[0024] Figure 5 It is an installation schematic diagram of the floating lower mold of the present invention;

[0025] Figure 6 It is a schematic diagram of the upper template of the present invention;

[0026] Figure 7 It is a schematic diagram of the floating lower mold of the present invention;

[0027] Figure 8 It is a schematic diagram of the plug connector of the present invention;

[0028] Figure 9 It is a cross-sectional view of the plug connector of the present invention;

[0029] Figure 10 It is a schematic diagram of the internal structure of the cylindrical housing of the present invention;

[0030] Figure 11 For the present inventionFigure 9 Enlarged view at position A in the middle;

[0031] Figure 12 Stereoscopic schematic diagram of the pin assembly of the present invention;

[0032] Figure 13 Cross-sectional view of the pin assembly of the present invention;

[0033] Figure 14 Side schematic diagram of the floating plug connection of the present invention;

[0034] Figure 15 Side cross-sectional view of the floating plug connection of the present invention;

[0035] Wherein, 1. Frame-shaped body; 2. Pulling device; 3. Locking device; 4. Floating lower die; 5. Lower pressing module; 6. Upper template; 7. Lower pressing cylinder; 8. Lifting plate; 9. Connector; 10. Cylindrical shell; 11. Polygonal block; 12. Cavity; 13. First elastic sheet; 14. Hollow cylindrical part; 15. Second elastic sheet; 16. Pin assembly; 161. Column; 162. First ring sleeve structure; 163. Second ring sleeve structure; 17. Arc section; 18. Bent section; 19. Pin; 20. Elastic ring; 21. Cavity opening; 22. Side pushing cylinder; 23. Side pushing plate; 24. Positioning and guiding plate; 25. First gap; 26. Locking nail; 27. Elastic member; 28. Detection pin group; 29. Positioning and guiding pin; 30. Module partition; 31. Convex rib; 32. Soft glue layer; 33. Fixed plate; 34. Plain bearing; 35. Heat dissipation plate; 36. Empty groove; 37. Inductor; 38. Rotary cylinder; 39. Sliding plate; 40. Pressing block; 41. Metal shielding cover; 42. Guide wedge block. Detailed implementation manner

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0037] As Figure 1 , Figure 2 shown, the present invention provides a power amplifier test device, including a frame-shaped body 1, a pulling device 2 is provided on the frame-shaped body 1. In this embodiment, the frame-shaped body 1 is a cuboid. Of course, the shape of the frame-shaped body 1 is not limited. A metal shielding cover 41 is also provided outside the frame-shaped body 1 to prevent signal interference. A locking device 3 is provided at one end of the pulling device 2 that pushes into the frame-shaped body 1. After the pulling device 2 is pushed into the frame-shaped body 1, the locking device 3 locks and fixes the pulling device 2; As Figure 4As shown, the drawing device 2 includes a sliding plate 39 and side plates symmetrically arranged on both sides inside the frame body 1. A chute assembly is provided on the side plates, and the sliding plate 39 is connected to the chute assembly. The chute assembly can be a structure of a slide rail and a slider, and the sliding plate 39 can move on the slide rail. The floating lower die 4 is fixed on the sliding plate 39, enabling it to be drawn on the frame body 1, similar to the structure of a drawer. An inductor 37 is provided at the end of the chute assembly. The locking device 3 includes a rotary cylinder 38 fixed at the end of the track. When the rotary cylinder 38 is activated, the pressing block 40 hooks on the end of the fixing plate 33. After the drawing device 2 moves inside the frame body 1, when the inductor 37 senses it, the rotary cylinder 38 is activated, and the clamping block at the end of the rotary cylinder 38 presses on the protruding part at the end of the sliding plate 39, used to position the drawing mechanism and the template.

[0038] As Figure 3 、 Figure 5 As shown, a floating lower die 4 is provided on the drawing device 2, and the floating lower die 4 is used to carry the plate to be tested. During use, after the drawing device 2 pulls out with the floating lower die 4, a PCB board is placed on the floating lower die 4. A number of module partitions 30 are provided on the opposite surfaces of the upper template 6 and the floating lower die 4. As Figure 6 、 Figure 7 As shown, convex ribs 31 are provided around the module partition 30, and a soft glue layer 32 is provided on the convex ribs 31. The module partition 30 is set according to the structure of the PCB board. The components on the PCB board will be within the module partition 30, and the convex ribs 31 at the edge of the module partition 30 press on the empty positions of the PCB board. The soft glue layer 32 provided on the convex ribs 31 ensures that the PCB board is not damaged and can position the PCB board. A downward pressing module 5 is provided at the top of the frame body 1, and an upper template 6 is connected to the lower part of the downward pressing module 5. The downward pressing module 5 can be a downward pressing cylinder 7 or an oil cylinder or a module, etc., which presses the upper template 6 downward and presses it on the floating lower die 4.

[0039] As Figure 3 、 Figure 5As shown, at least one pressing cylinder 7 is arranged on the upper template 6. Of course, the number of pressing cylinders 7 is set according to the test joints required for the actual test board. In this embodiment, 4 groups are set. The output end of the pressing cylinder 7 is connected to a lifting plate 8. The output end of the pressing cylinder 7 is arranged upward. The lifting plate 8 is L-shaped. A number of plug connectors 9 are arranged on the lifting plate 8. The end of the plug connector 9 passes through the upper template 6 and presses on the test board. Since after the upper template 6 is pressed down, the plug connector 9 is also pressed down through the upper template 6 by the pressing cylinder 7 and presses on the test PCB board, errors in the insertion between the upper template 6 and the floating lower die 4 need to be avoided, and errors in the insertion of the plug connector 9 into the interface also need to be avoided. Therefore, a positioning guide pin 29 is provided between the upper template 6 and the floating lower die 4. The floating lower die 4 is provided with at least two groups of positioning pins (inside the plain bearing 34, not shown) on the fixed plate 33. The positioning pins pass through the floating lower die 4. A plain bearing 34 is provided on the positioning pins between the floating lower die 4 and the fixed plate 33. There is a gap between the positioning pins and the floating lower die 4. When the upper die is pressed down, it is positioned by the positioning guide pin 29. Even if there is an error, it will drag the floating lower die to displace horizontally. This is the preliminary floating positioning. Secondly, it is the floating of the plug connector 9.

[0040] Specifically:

[0041] As Figure 8 , Figure 9 , Figure 10 , Figure 11 shown, the plug connector 9 includes a cylindrical shell 10 passing through and fixed on the lifting plate 8. A polygonal block 11 is provided at the end of the cylindrical shell 10. The polygonal block 11 passes through the upper template 6. The polygonal block 11 is equivalent to the shape of a bolt and is sleeved with an annular sleeve. There are holes on the upper template 6 to facilitate the passage of the cylindrical shell. There is a gap between the hole on the upper template 6 and the outside of the annular sleeve, so that the cylindrical shell 10 cannot pass through the upper template 6 when there is an assembly error. Leaving a gap helps to offset the installation error. And a pin is also provided on the upper template 6. When the lifting plate 8 is pressed down, the pin plays a guiding role.

[0042] In addition, a cavity 12 is provided in the polygonal block 11 of the aforementioned connector. A number of first elastic pieces 13 are arranged in a circular arrangement inside the cavity 12; a hollow cylindrical part 14 is provided at the center of the cavity 12. A number of second elastic pieces 15 are arranged in a circular arrangement inside the hollow cylindrical part 14. The first elastic pieces 13 are arranged in a circular arrangement and can be set to 5 groups. The first elastic piece 13 includes an arc section 17 and a bent section 18. The bending direction of the bent section 18 points to the second ring sleeve structure 163. The mouth of the cavity 12 bends inward. The end of the bent section 18 presses on the mouth of the cavity 12. The mouth of the cavity 12 is inclined and guided towards the inside of the cavity 12 for the insertion of the lower pin assembly 16. AsFigure 12 , Figure 13 As shown, the pin assembly 16 includes a cylinder 161. At the end parts of the cylinder 161, a first ring sleeve structure 162 and a second ring sleeve structure 163 are respectively provided. A pin 19 is arranged through the centers of the first ring sleeve structure 162 and the second ring sleeve structure 163. An elastic ring 20 is arranged between the pin 19 and the cylinder 161. The bent section 18 is stuck under the first ring sleeve structure 162, and a circularly designed elastic sheet structure is provided. When the end of the bent section 18 of the elastic sheet is squeezed by the first ring sleeve joint, the elastic sheet folds towards the inner wall of the cavity and finally presses the first ring sleeve tightly. When the first ring sleeve structure 162 is completely stuck, due to the elasticity of the elastic sheet, the second ring sleeve structure 162 is used for the interface on the lower plate body. When there is a deviation during insertion and mating, the cylinder 161 together with the first ring sleeve can squeeze the elastic sheet, causing it to deform slightly, thereby realizing a slight offset of the cylinder 161, which can offset the assembly error for the insertion and mating interface. Similarly, for the pin 19 in the middle, there will also be errors, resulting in an offset of the pin holes on the to-be-tested board. Therefore, a soft rubber ring is arranged between the pin 19 and the cylinder 161. At the same time, when the pin 19 is assembled in the hollow cylindrical part 14, the pin 19 is positioned and centered by the second elastic sheet 15 to ensure the stability of the lower part. When there is an inaccurate docking, the pin 19 may be inserted at the edge of the jack and will continue to move downward along the groove of the pin 19, slightly squeezing the rubber ring, and there is a second elastic positioning at the end. After the detection, it will still reset when lifted, and it can be inserted and mated with detection holes with different errors. Since the pin 19 does not have a rigid insertion and mating, it will not break. Considering the floating of multiple groups of positions as described above, the error is greatly reduced, and the damage rate of the pin 19 is greatly reduced during actual application. During use, the plug connector 9 is externally connected to a test device (not shown in the figure) and the connection wire extends out of the top shell.

[0043] In addition, it should be noted that: Since there are also connectors on the side of the to-be-tested board that need to be tested, such as Figure 14 , Figure 15As shown in the figure, a side push cylinder 22 is provided at the edge of the upper template 6. The output end of the side push cylinder 22 is connected to a side push plate 23. A floating plug is provided on the side push plate 23. The floating plug includes at least one positioning and guiding plate 24 passing through the side push plate 23. At one end of the positioning and guiding plate 24 pointing to the floating lower die 4, there is a guiding wedge block 42. Three groups of guiding wedge blocks 42 are provided, arranged in a rectangular pattern respectively, without being provided at the top. When mating with the PCB board, the alignment is more accurate. There is a first gap 25 between the positioning and guiding plate 24 and the side push plate 23. A number of locking pins 26 pass through the positioning and guiding plate 24, and the ends of the locking pins 26 are fixed on the side push plate 23. There is a second gap between the locking pins 26 and the positioning and guiding plate 24. An elastic member 27 is provided between the end of the locking pin 26 and the positioning and guiding plate 24. A detection pin group 28 is fixed at the center of the positioning and guiding plate 24. When mating, when the mating position is not completely aligned, the positioning and guiding plate 24 can move slightly within the side push plate 23. And the elastic member 27 is selected as a spring. When the insertion pins 19 are not aligned and are stressed, it will push the positioning and guiding plate 24 to slightly retract, and it will not cause the insertion pins 19 to break. If the offset is not large, the positioning and guiding plate 24 will float, and then the insertion pins 19 can still be inserted, improving the accuracy.

[0044] And when mating, since a large amount of heat will be generated during the measurement of the power amplifier, a number of empty slots 36 are provided on the floating lower die. A heat dissipation plate 35 is elastically locked at the empty slots 36, and efficient heat dissipation is carried out by the heat dissipation plate 35 attaching to the controller of the PCB.

[0045] Through the floating base of this device and the plug-in floating of the first elastic piece 13 and the second elastic piece 15 cooperating with the plug connector 9, with the cooperation of multiple floating structures, during the plug-in test, the combined floating structure can improve the accuracy during plug-in and increase the service life of the test tooling.

Claims

1. A power amplifier test device, characterized in that It includes a frame-shaped body, on which a drawing device is provided. At one end of the frame-shaped body advanced by the drawing device, a locking device is provided. After the drawing device is advanced into the frame-shaped body, the locking device locks and fixes the drawing device. A floating lower die is provided on the drawing device, and the floating lower die is used to carry the plate to be tested. A downward pressing module is provided at the top of the frame-shaped body. A upper template is connected to the lower part of the downward pressing module. At least one downward pressing cylinder is arranged in an array on the upper template. The output end of the downward pressing cylinder is connected to a lifting plate. A number of plug connectors are arranged in an array on the lifting plate. The end of the plug connector passes through the upper template and presses on the plate to be tested. The plug connector includes a cylindrical shell passing through and fixed on the lifting plate. A polygonal block is provided at the end of the cylindrical shell. The polygonal block passes through the upper template. A cavity is provided in the polygonal block. A number of first elastic pieces are arranged in a circumferential array in the cavity. A hollow cylindrical part is provided at the center of the cavity. A number of second elastic pieces are arranged in a circumferential array in the hollow cylindrical part. The first elastic pieces are used to center the plug connector and have a floating effect. A pin assembly is clamped between the circumferentially arranged first elastic pieces. The pin assembly includes a cylinder. A first ring sleeve structure and a second ring sleeve structure are respectively provided at the end of the cylinder. A pin passes through the centers of the first ring sleeve structure and the second ring sleeve structure. An elastic ring is provided between the pin and the cylinder. The first ring sleeve structure is clamped in the first elastic piece. At the same time, the pin in the first ring sleeve structure is inserted between the second elastic pieces. The other ring sleeve structure is used to dock with the plate to be tested. The second elastic pieces are used to center the pin and have a floating effect.

2. The power amplifier test equipment according to claim 1, wherein The first elastic piece includes an arc segment and a bent segment. The bending direction of the bent segment points to the second ring sleeve structure. The mouth of the cavity bends inward. The end of the bent segment presses on the mouth of the cavity.

3. The power amplifier test equipment according to claim 1, wherein A side pushing cylinder is provided at the edge of the upper template. The output end of the side pushing cylinder is connected to a side pushing plate. A floating plug is provided on the side pushing plate, and the floating plug points to the space between the upper template and the floating lower die.

4. The power amplifier test device according to claim 3, wherein, The floating plug includes at least one positioning and guiding plate passing through the side pushing plate. A first gap is provided between the positioning and guiding plate and the side pushing plate. A number of locking nails pass through the positioning and guiding plate. The end of the locking nail is fixed on the side pushing plate. A second gap is provided between the locking nail and the positioning and guiding plate. An elastic member is provided between the end of the locking nail and the positioning and guiding plate. A detection pin group is fixed at the center of the positioning and guiding plate.

5. The power amplifier test equipment according to claim 4, wherein, A guiding wedge block is provided at one end of the positioning and guiding plate pointing to the floating lower die.

6. The power amplifier test device according to claim 1, wherein, A positioning and guiding pin is provided between the upper template and the floating lower die.

7. The power amplifier testing device according to claim 1, wherein A number of module partitions are provided on the opposite surfaces of the upper template and the floating lower die. Convex edges are provided around the module partitions, and a soft glue layer is provided on the convex edges.

8. The power amplifier test device according to claim 1, wherein A fixing plate is provided on the drawing device. At least two groups of positioning nails are provided on the fixing plate. The positioning nails pass through the floating lower die. A plain bearing is provided on the positioning nail between the floating lower die and the fixing plate.

9. The power amplifier testing device according to claim 1, wherein A number of empty slots are provided on the floating lower die, and a heat dissipation plate is elastically locked at the empty slots.

10. The power amplifier test equipment according to claim 8, characterized in that, The drawing device includes a sliding plate and side plates symmetrically arranged on both sides inside the frame. A chute assembly is provided on the side plates, and the sliding plate is connected to the chute assembly. The chute assembly includes a slide rail, and the sliding plate can move on the slide rail. An inductor is provided at the end of the chute assembly. The locking device includes a rotary cylinder fixed at the end of the slide rail. The output end of the rotary cylinder is connected with a pressing block. When the rotary cylinder is activated, the pressing block hooks on the end of the fixing plate.

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