Power amplifier test equipment

Abstract

The invention provides power amplifier test equipment which comprises a frame-shaped frame body, a drawing device is arranged on the frame-shaped frame body, a locking device is arranged at one end, pushed into the frame-shaped frame body, of the drawing device, and after the drawing device is pushed into the frame-shaped frame body, the locking device locks and fixes the drawing device; the drawing device is provided with a floating lower die which is used for bearing a to-be-tested plate. According to the device, the PCB is positioned through the upper die plate and the lower die plate, movement of the PCB is prevented, the floating lower die is arranged, it is guaranteed that when the upper die and the lower die are inserted, positioning is accurate, position inaccuracy caused by errors of the upper die and the lower die is eliminated, and consequently the connecting plug alignment inaccuracy is caused, and meanwhile the fine adjustment floating structure on the inner side of the connecting plug is further arranged. And under the condition that the position is accurate in the large direction, the error of each connecting plug is also avoided, the inaccuracy caused by the assembly error of the tool is eliminated, the stability of connecting plugs is greatly improved, and the service life of the contact pin is prolonged.

Description

Technical Field

[0001] The invention relates to the field of design and testing tooling, and in particular to a power amplifier testing device. Background Art

[0002] The power amplifier is one of the most important devices in the RF communication system. Similar to other amplifiers, the RF power amplifier (RF PA) amplifies the signal input to its input end. The RF PA 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 to position the PCB board, connect it through different testers, and then test the RF indicators. Usually, it is necessary to use a special tooling for connection testing. The characteristics of the tooling are that it has high accuracy requirements. Since there are many connection ports on the PCB board, it is necessary to connect multiple connectors one by one for testing. However, the existing tooling generally has low accuracy. When the interface is connected, it is easy to cause inaccurate alignment and breakage of the pin. However, due to the problem of inaccurate alignment, it is difficult to determine which specific part has an error due to the large number of parts, which makes it difficult to determine the location of the repair parts. Therefore, the test pin damage rate is high, and replacement is frequent, and there will also be problems with damage to the board to be tested. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes a power amplifier testing device, comprising a frame-shaped frame, on which a pulling device is provided, and one end of the pulling device that pushes the frame-shaped frame is provided with a locking device, and after the pulling device is pushed into the frame-shaped frame, the locking device locks and fixes the pulling device;

[0004] The pulling device is provided with a floating lower die, and the floating lower die is used to carry the plate to be tested;

[0005] The top of the frame body is provided with a pressing die set, the lower part of the pressing die set is connected to an upper die set, at least one pressing cylinder is arranged on the upper die set, the output end of the pressing cylinder is connected to a lifting plate, a plurality of plug connectors are arranged on the lifting plate, and the ends of the plug connectors pass through the upper die set and are pressed on the board to be tested;

[0006] 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, and a plurality of first elastic pieces are arranged circumferentially in the cavity; a hollow cylindrical portion is provided at the center of the cavity, and second elastic pieces are arranged circumferentially in the hollow cylindrical portion, and 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 spring sheets arranged in a circle, and the pin assembly includes a column, and the ends of the column are respectively provided with a first ring sleeve structure and a second ring sleeve structure, and a pin is provided through the center of the first ring sleeve structure and the second ring sleeve structure, and an elastic ring is provided between the pin and the column;

[0008] The first ring structure is stuck in the first spring piece, and the pin in the first ring structure is inserted between the second spring pieces. The ring structure on the other side is used to match the test board, and the second spring piece is used to center the pin and has a floating effect.

[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 structure, the cavity mouth is bent inward, and the end of the bent segment is pressed against the cavity mouth.

[0010] Preferably, a side push cylinder is provided on the edge of the upper mold plate, an 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 to between the upper mold plate and the floating lower mold.

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

[0012] Preferably, a guide wedge is provided at one end of the positioning guide plate pointing toward the lower template.

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

[0014] Preferably, a plurality of module partitions are provided on the surfaces opposite to each other of the upper template and the lower template, convex ridges are provided around the module partitions, and a soft adhesive layer is provided on the convex ridges.

[0015] Preferably, a fixing plate is provided on the pulling device, and at least two groups of positioning pins are provided on the fixing plate. The positioning pins pass through the lower template, and plane bearings are provided on the positioning pins between the lower template and the fixing plate.

[0016] Preferably, the lower template is provided with a plurality of empty slots, and heat dissipation plates are elastically locked in the empty slots.

[0017] Preferably, the pulling and pulling device includes a sliding plate and side plates symmetrically arranged on both sides of the frame body, the side plates are provided with a slide slot assembly, the sliding plate is connected to the slide slot assembly, a sensor is provided at the end of the slide slot assembly, and the locking device includes a rotating cylinder fixed to the end of the track, the rotating cylinder is started, and the pressure block is hooked on the end of the fixed plate.

[0018] The beneficial effects of the power amplifier testing equipment proposed in this scheme are as follows: the device positions the PCB board in the form of upper and lower templates to prevent the movement of the PCB board, and then sets a floating lower mold to ensure accurate positioning when the upper and lower molds are plugged in, thereby eliminating the inaccurate position caused by the errors of the upper and lower molds, which leads to inaccurate alignment of the plug connector. At the same time, a fine-tuning floating structure is set on the inner side of the plug connector to ensure that the error of each plug connector is avoided while ensuring the accurate position in the general direction, thereby eliminating the inaccuracy caused by the error of the tooling assembly, greatly improving the stability of the plug connector, and increasing the service life of the pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

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

[0021] Figure 2 A schematic diagram of a frame body of the present invention;

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

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

[0024] Figure 5 It is a schematic diagram of the installation 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 is a schematic diagram of a plug connector of the present invention;

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

[0029] Fig.10 This is a schematic diagram of the interior of the cylindrical housing of the present invention;

[0030] Fig.11 For the present invention Fig. 9 Enlarged view of point A in the middle;

[0031] Fig.12 is a three-dimensional schematic diagram of the pin assembly of the present invention;

[0032] Fig.13 is a cross-sectional view of the pin assembly of the present invention;

[0033] Fig.14 A side view schematic diagram of the floating plug connection of the present invention;

[0034] Fig.15 A side cross-sectional view of a floating plug connection of the present invention;

[0035] Among them, 1. frame; 2. pulling device; 3. locking device; 4. floating lower mold; 5. pressing mold group; 6. upper mold plate; 7. pressing cylinder; 8. lifting plate; 9. plug connector; 10. cylindrical shell; 11. polygonal block; 12. cavity; 13. first spring sheet; 14. hollow cylindrical part; 15. second spring sheet; 16. pin assembly; 161. column; 162. first ring structure; 163. second ring structure; 17. arc segment; 18. bending segment; 19. pin; 20. Elastic ring; 21, cavity mouth; 22, side thrust cylinder; 23, side thrust plate; 24, positioning guide plate; 25, first gap; 26, locking nail; 27, elastic member; 28, detection pin group; 29, positioning guide pin; 30, module partition; 31, convex ridge; 32, soft rubber layer; 33, fixing plate; 34, plane bearing; 35, heat sink; 36, empty slot; 37, sensor; 38, rotating cylinder; 39, sliding plate; 40, pressure block; 41, metal shielding cover; 42, guide wedge. DETAILED DESCRIPTION

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

[0037] like Figure 1 , Figure 2 As shown, the present invention proposes a power amplifier test device, including a frame body 1, on which a pull-out device 2 is provided. In this embodiment, the frame body 1 is a rectangular parallelepiped, but the shape of the frame body 1 is not limited. A metal shielding cover 41 is also provided on the outside of the frame body 1 to prevent signal interference. A locking device 3 is provided at one end of the pull-out device 2 that pushes the frame body 1. After the pull-out device 2 is pushed into the frame body 1, the locking device 3 locks and fixes the pull-out device 2; as shown in FIG. Figure 4As shown, the pulling and drawing device 2 includes a sliding plate 39 and side plates symmetrically arranged on both sides of the frame body 1, and a slide groove assembly is arranged on the side plate, and the sliding plate 39 is connected to the slide groove assembly. The slide groove assembly can be a structure of a slide rail and a slider, and the sliding plate 39 can move on the slide rail, and the lower template is fixed on the sliding plate 39, so that pulling and drawing can be realized on the frame body 1, similar to the structure of a drawer, and a sensor 37 is provided at the end of the slide groove assembly, and the locking device 3 includes a rotating cylinder 38 fixed to the end of the track. When the rotating cylinder 38 is started, the pressure block 40 is hooked on the end of the fixed plate 33. When the pulling and drawing device 2 moves inside the frame body 1, the sensor 37 senses and starts the rotating cylinder 38. The block at the end of the rotating cylinder 38 is pressed on the protruding part of the end of the sliding plate 39, which is used to position the extraction mechanism and the template.

[0038] like Figure 3 , Figure 5 As shown, the pull-out device 2 is provided with a floating lower mold 4, and the floating lower mold 4 is used to carry the board to be tested; when in use, after the pull-out device 2 is pulled out with the floating lower mold 4, a PCB board is placed on the floating lower mold 4, and a plurality of module partitions 30 are provided on the surfaces opposite to the upper mold 6 and the lower mold, such as Figure 6 , Figure 7 As shown, the module partition 30 is provided with ridges 31 around it, and the ridges 31 are provided with a soft adhesive layer 32. The module partition 30 is provided according to the structure of the PCB board. The devices on the PCB board will be in the module partition 30. The ridges 31 at the edge of the module partition 30 are pressed on the empty space of the PCB board. The soft adhesive layer 32 provided on the ridges 31 can prevent the PCB board from being crushed and can position the PCB board. The top of the frame body 1 is provided with a pressing module 5, and the lower part of the pressing module 5 is connected to an upper template 6. The pressing module 5 can be a pressing cylinder 7 or an oil cylinder or a module, etc., which presses the upper template 6 downward and presses it on the lower template.

[0039] like Figure 3 , Figure 5As shown, at least one pressing cylinder 7 is arranged on the upper template 6. Of course, the number of the pressing cylinders 7 is set according to the joints to be tested required by the actual board to be tested. 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 set upward. The lifting plate 8 is L-shaped. A plurality of plug connectors 9 are arranged on the lifting plate 8. The ends of the plug connectors 9 pass through the upper template 6 and are pressed on the board to be tested. After the upper template 6 is pressed down, the plug connectors 9 are also pressed down by the pressing cylinder 7 through the upper template 6 and pressed on the PCB board to be tested. Therefore, the plugging between the upper template 6 and the floating lower mold 4 needs to avoid Errors and errors of the plug connector 9 being inserted into the interface also need to be avoided, so a positioning guide pin 29 is provided between the upper template 6 and the lower template, and the floating lower mold 4 is achieved by providing at least two groups of positioning pins on the fixed plate 33 (in the plane bearing 34, not drawn), the positioning pins pass through the lower template, and the positioning pins between the lower template and the fixed plate 33 are provided with plane bearings 34, and a gap is provided between the positioning pins and the lower template. When the upper mold is pressed down, the positioning guide pin 29 is used for positioning. Even if there is an error, the floating lower mold will be dragged to move in the horizontal direction. This is the initial floating positioning, and then the floating of the plug connector 9.

[0040] Specifically:

[0041] like Figure 8 , Fig. 9 , Fig.10 , Fig.11 As shown, the plug connector 9 includes a cylindrical shell 10 that passes through and is 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. An annular sleeve is provided on the outer sleeve, and a hole is provided on the upper template 6 to facilitate the passage of the cylindrical shell. A gap is provided between the hole of 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, and a plurality of first spring pieces 13 are arranged circumferentially in the cavity 12; a hollow cylindrical portion 14 is provided at the center of the cavity 12, and second spring pieces 15 are arranged circumferentially in the hollow cylindrical portion 14. The first spring pieces 13 are arranged circumferentially and can be arranged in 5 groups. The first spring pieces 13 include an arc segment 17 and a bending segment 18, and the bending direction of the bending segment 18 points to the second annular structure 163. The mouth of the cavity 12 is bent inwardly, and the end of the bending segment 18 is pressed against the mouth of the cavity 12. The mouth of the cavity 12 is inclined and guided toward the interior of the cavity 12, and the lower pin assembly 16 is inserted, such as Fig.12 , Fig.13 As shown, the pin assembly 16 includes a column 161, and the ends of the column 161 are respectively provided with a first ring structure 162 and a second ring structure 163. The centers of the first ring structure 162 and the second ring structure 163 pass through a pin 19, and an elastic ring 20 is provided between the pin 19 and the column 161. The bending section 18 is clamped at the lower part of the first ring structure 162, and the circumferentially designed spring sheet structure, when the first ring joint squeezes the end of the bending section 18 of the spring sheet, the spring sheet folds toward the inner wall of the cavity and finally presses the first ring. When the first ring structure 162 is completely clamped, due to the elasticity of the spring, the second ring structure 162 is used to plug into the interface on the lower plate. When the insertion encounters deviation, the column 161 together with the first ring can squeeze the spring sheet to cause it to deform a little, thereby realizing the column. The slight offset of 161 can offset the assembly error. The same error will occur in the plug interface and the middle plug pin 19, which will cause the pin hole of the board to be tested to be offset. Therefore, a soft rubber ring is set between the plug pin 19 and the column 161. At the same time, when the plug pin 19 is assembled in the hollow cylindrical part 14, the plug pin 19 is positioned and centered by the second spring sheet 15 to ensure the stability of the lower part. When there is inaccurate docking, the plug pin 19 may be inserted at the edge of the plug hole and continue to move down along the plug pin 19 groove, slightly squeezing the rubber ring, and the end has a second elastic positioning. After the test is completed, it will still reset when lifted. It can be inserted for test holes with different errors. Since there is no rigid insertion, the plug pin 19 will not break. The floating of the above-mentioned multiple groups of positions greatly reduces the error. In actual application, the damage rate of the plug pin 19 is greatly reduced. When in use, the plug connector 9 external test equipment (not shown in the figure) connecting line extends out of the top shell.

[0043] In addition, it should be noted that: Since there are also joints on the side of the board to be tested that need to be tested, such as Fig.14 , Fig.15As shown, a side push cylinder 22 is provided at the edge of the upper template 6, and a side push plate 23 is connected to the output end of the side push cylinder 22. A floating plug is provided on the side push plate 23, and the floating plug includes at least one positioning guide plate 24 passing through the side push plate 23. A guide wedge 42 is provided at one end of the positioning guide plate 24 pointing to the lower template. The guide wedges 42 are arranged in three groups, which are arranged in a rectangular arrangement respectively, and the top is not provided. When the PCB board is plugged in, the alignment is more accurate. A first gap 25 is provided between the positioning guide plate 24 and the side push plate 23, and a plurality of locking nails 26 are passed through the positioning guide plate 24. The ends of the locking nails 26 are fixed On the side push plate 23, a second gap is provided between the locking pin 26 and the positioning guide plate 24, and an elastic member 27 is provided between the end of the locking pin 26 and the positioning guide plate 24; a detection pin group 28 is fixed at the center of the positioning guide plate 24, and during insertion, when the insertion positions are not completely aligned, the positioning guide plate 24 can move slightly inside the side push plate 23, and the elastic member 27 is a spring, and when the pin 19 is not aligned and subjected to force, it will push the positioning guide plate 24 to slightly retreat, and will not cause the pin 19 to break. If the offset is not large, the positioning guide plate 24 will float, and the pin 19 can still be inserted, thereby improving accuracy.

[0044] Furthermore, when plugged in, since a large amount of heat is generated when measuring the power amplifier, a plurality of empty slots 36 are provided on the floating lower mold, and heat sinks 35 are elastically locked at the empty slots 36, so that the heat sinks 35 are attached to the controller of the PCB for efficient heat dissipation.

[0045] The device floats by means of a floating base and the first and second spring pieces 13 and 15 of the plug connector 9, and multiple groups of floating structures cooperate. During the plug-in test, the combined floating structure can improve the accuracy of the plug-in and increase the life of the test tooling.

Claims

1. A power amplifier test device, It is characterized in that It comprises a frame-shaped frame, on which a pulling device is provided, and one end of the pulling device that pushes the frame-shaped frame is provided with a locking device, and after the pulling device is pushed into the frame, the locking device locks and fixes the pulling device; The pulling device is provided with a floating lower die, and the floating lower die is used to carry the plate to be tested; The top of the frame body is provided with a pressing die set, the lower part of the pressing die set is connected to an upper die set, at least one pressing cylinder is arranged on the upper die set, the output end of the pressing cylinder is connected to a lifting plate, a plurality of plug connectors are arranged on the lifting plate, and the ends of the plug connectors pass through the upper die set and are pressed on the board to be tested; The plug connector comprises 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, and a plurality of first elastic sheets are arranged circumferentially in the cavity; a hollow cylindrical portion is provided at the center of the cavity, and second elastic sheets are arranged circumferentially in the hollow cylindrical portion, and the first elastic sheets are used to center the plug connector and have a floating effect; A pin assembly is engaged between the first spring sheets arranged in a circle, and the pin assembly includes a column, and the ends of the column are respectively provided with a first ring sleeve structure and a second ring sleeve structure, and a pin is provided through the center of the first ring sleeve structure and the second ring sleeve structure, and an elastic ring is provided between the pin and the column; The first ring structure is stuck in the first spring piece, and the pin in the first ring structure is inserted between the second spring pieces. The ring structure on the other side is used to match the test board, and the second spring piece is used to center the pin and has a floating effect.

2. The power amplifier test equipment according to claim 1, It is characterized in that The first elastic piece includes an arc section and a bent section, the bending direction of the bent section points to the second ring structure, the cavity opening is bent inward, and the end of the bent section is pressed against the cavity opening.

3. The power amplifier testing device according to claim 1, It is characterized in that A side push cylinder is provided at the edge of the upper mold plate, an 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 to between the upper mold plate and the floating lower mold.

4. The power amplifier testing device according to claim 3, It is characterized in that The floating plug includes at least one positioning guide plate passing through the side push plate, a first gap is provided between the positioning guide plate and the side push plate, a plurality of locking pins pass through the positioning guide plate, the ends of the locking pins are fixed to the side push plate, a second gap is provided between the locking pin and the positioning guide plate, an elastic member is provided between the ends of the locking pins and the positioning guide plate; a detection pin group is fixed at the center of the positioning guide plate.

5. The power amplifier testing device according to claim 4, It is characterized in that A guide wedge is provided at one end of the positioning guide plate pointing to the lower template.

6. The power amplifier testing device according to claim 1, It is characterized in that Positioning guide pins are arranged between the upper template and the lower template.

7. The power amplifier testing device according to claim 1, It is characterized in that A plurality of module partitions are arranged on the surfaces opposite to the upper template and the lower template, convex ridges are arranged around the module partitions, and a soft adhesive layer is arranged on the convex ridges.

8. The power amplifier testing device according to claim 1, It is characterized in that The pulling device is provided with a fixing plate, and the fixing plate is provided with at least two groups of positioning pins, and the positioning pins pass through the lower template, and plane bearings are provided on the positioning pins between the lower template and the fixing plate.

9. The power amplifier testing device according to claim 1, It is characterized in that The lower template is provided with a plurality of empty slots, and heat dissipation plates are elastically locked at the empty slots.

10. The power amplifier testing device according to claim 1, It is characterized in that The pulling and pulling device includes a sliding plate and side plates symmetrically arranged on both sides of the frame body, a slide slot assembly is arranged on the side plates, the sliding plate is connected to the slide slot assembly, a sensor is arranged at the end of the slide slot assembly, and the locking device includes a rotating cylinder fixed to the end of the track, a pressure block is connected to the output end of the rotating cylinder, and the rotating cylinder is started, and the pressure block is hooked on the end of the fixed plate.

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