Radio frequency power amplifier board test fixture

Abstract

The invention relates to the technical field of test fixtures, in particular to a radio frequency power amplifier board test fixture which comprises a fixed seat, telescopic guide rods which are symmetrical to each other are fixedly connected to one side of the top of the fixed seat, a pressing plate is fixedly connected to the top ends of the telescopic guide rods, and an electric push rod is fixedly connected between the fixed seat and the pressing plate. A placing groove is formed in the top of the fixing base, a plurality of elastic probe pieces are installed on the pressing plate, the pressing plate which is pressed downwards can drive the elastic probe pieces to move and move towards a radio frequency power amplifier board placed in the placing groove, the elastic probe pieces are made to make contact with the radio frequency power amplifier board, and the radio frequency power amplifier board is placed in the placing groove through elastic components in the elastic probe pieces. The elastic probe piece can be in contact with each element on the radio frequency power amplifier board, so that the phenomenon that the elastic probe piece is not in contact with the element in place is reduced, the test error caused by the fact that the elastic probe piece is not in contact with the element is eliminated to the maximum extent, and the test accuracy of the radio frequency power amplifier board is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of test fixtures, and particularly to a test fixture for a radio frequency power amplifier board. Background Art

[0002] The radio frequency power amplifier board is one of the core components of a wireless communication system. Its technological development closely follows the evolution of modern communication requirements. It is a circuit board designed specifically for amplifying the power of radio frequency signals and is widely used in fields such as wireless communication, radar, and broadcasting. When producing a radio frequency power amplifier board, it is necessary to conduct performance tests on the radio frequency power amplifier boards produced at the factory to ensure the factory quality of the radio frequency power amplifier boards. When conducting performance tests on them, it is often necessary to fix the radio frequency power amplifier board through a test fixture and cooperate with test equipment to conduct a series of tests on the radio frequency power amplifier board.

[0003] Currently, the test fixtures on the market are internally provided with a probe group or a contact plate. When the test fixture fixes the radio frequency power amplifier board, the probe group or the contact plate contacts the components on the radio frequency power amplifier board, and then cooperates with external test equipment to transmit test signals to the components, thereby testing the radio frequency power amplifier board.

[0004] However, most of the existing probe groups or contact plates are fixed inside the fixture. Since the sizes of the components on the radio frequency power amplifier board are different, it is easy for the probe group or the contact plate to deviate when contacting the radio frequency power amplifier board, and some contact points on the probe group or the contact plate cannot form contact with the components, resulting in the test signals not being stably transmitted to each component, and then the phenomenon of test data errors occurs, resulting in inaccurate test data, which is not conducive to people carrying out performance test work on the radio frequency power amplifier board. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a test fixture for a radio frequency power amplifier board. Through the elastic components inside the elastic probe member, the elastic probe member can contact each component on the radio frequency power amplifier board, reducing the phenomenon that the elastic probe member fails to contact the component properly, and eliminating the test errors caused by the non-contact between the elastic probe member and the component to the greatest extent, thereby improving the accuracy of the test on the radio frequency power amplifier board.

[0006] To achieve the above object, the present invention provides the following technical solution: A test fixture for a radio frequency power amplifier board, including a fixed base, on one side of the top of the fixed base, symmetrically arranged telescopic guide rods are fixedly connected, the top ends of the telescopic guide rods are fixedly connected with a pressing plate, an electric push rod is fixedly connected between the fixed base and the pressing plate, a placement groove is opened on the top of the fixed base, a plurality of elastic probe members are installed on the pressing plate, and an external connection box is fixedly connected to the top of the pressing plate. One end of the elastic probe member is connected to the external connection box. On both sides of the bottom of the pressing plate, driving rods are fixedly connected. An inner cavity is opened inside the fixed base, a transmission assembly is fixedly connected in the inner cavity, insertion holes are opened on both sides of the fixed base, and the insertion holes communicate with the inner cavity. Elastic fixing members are installed on the four sides inside the placement groove, and the transmission assembly is in transmission connection with the elastic fixing members. Linkage members are installed on both sides inside the inner cavity, and the linkage members are in transmission connection with the transmission assembly. A storage cavity is opened on the fixed base, a shielding cover is slidably connected inside the storage cavity, and the linkage member is in transmission connection with the shielding cover; Driven by the electric push rod, the pressing plate presses downward towards the fixed base. The pressing plate drives the driving rod to drive the transmission assembly, and then drives the elastic fixing member to abut and fix the radio frequency power amplifier board. At this time, the transmission assembly synchronously drives the linkage member to lift the shielding cover, so that it contacts the pressing plate pressing downward, forming a closure for the placement groove. At the same time, the moving pressing plate drives the elastic probe member to contact the radio frequency power amplifier board, completing the fixation of the radio frequency power amplifier board.

[0007] Preferably, a control box is fixedly connected to one side of the telescopic guide rod, and fan groups are installed on both sides of the pressing plate. The control box is electrically connected to the fan groups.

[0008] Preferably, a cavity is opened inside the pressing plate. The elastic probe member includes a probe body slidably connected inside the pressing plate. A limiting plate is fixedly connected to the probe body, and a first spring is sleeved on the probe body. One end of the probe body away from the limiting plate is fixedly connected with a connecting wire, and the end of the connecting wire away from the probe body is connected to the external connection box.

[0009] Preferably, air guiding cavities are opened on both sides inside the pressing plate. The air guiding cavities communicate with the cavity. The fan groups are installed inside the air guiding cavities. A plurality of air guiding openings are opened at the bottom of the pressing plate, and the air guiding openings communicate with the cavity. A dust-proof net plate is fixedly connected to one end of the air guiding cavity away from the cavity.

[0010] Preferably, the transmission assembly includes a vertical rod fixedly connected inside the inner cavity. A driving member is slidably installed on the vertical rod, and a second spring is sleeved on the vertical rod. The second spring is located below the driving member.

[0011] Preferably, the driving member includes a driving block penetrating and connected to the vertical rod. Push-pull rods are rotatably connected to the four sides of the driving block. One end of the push-pull rod away from the driving block is rotatably connected to the elastic fixing member. Pressure members are installed at the bottom ends of the four sides of the driving block, and the pressure members are in transmission connection with the linkage member.

[0012] Preferably, the elastic fixing member includes a thrust block slidably installed on one side inside the fixed seat. Symmetric elastic members are fixedly connected to one side of the thrust block. One end of the elastic member away from the thrust block is fixedly connected to a clamping plate. The clamping plate is located inside the placement groove. The bottom of the thrust block is rotatably connected to the push-pull rod.

[0013] Preferably, the elastic member includes a telescopic rod fixedly connected between the thrust block and the clamping plate, and a third spring is sleeved on the telescopic rod.

[0014] Preferably, the linkage member includes columns symmetrically connected in the inner cavity. The top ends of the columns are rotatably connected to a linkage rod. One side of the linkage rod is rotatably connected to the shielding cover. A chute is opened at one end of the linkage rod away from the shielding cover.

[0015] Preferably, the pressure member includes a stress plate fixedly connected to the bottom end of one side of the driving block. A slider is fixedly connected to one end of the stress plate away from the driving block, and the slider is slidably installed inside the chute.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, the pressing plate can drive a plurality of elastic probe members to move downward and move towards the radio frequency power amplifier board placed in the placement groove, so that the plurality of elastic probe members are in contact with the radio frequency power amplifier board. Through the elastic components inside the elastic probe members, each component on the radio frequency power amplifier board can be contacted by the elastic probe members, reducing the phenomenon that the elastic probe members and the components are not in place in contact, and minimizing the test error caused by the non-contact between the elastic probe members and the components, improving the accuracy of the test of the radio frequency power amplifier board. At the same time, due to the elastic contact of the elastic probe members with the radio frequency power amplifier board, the possibility of wear and deformation of the elastic probe members during long-term use or in the use process is reduced, and the components on the radio frequency power amplifier board will not be damaged during contact, improving the stability and accuracy of the test results; 2. During the process of pressing down the pressure plate, the driving rod can be driven to be inserted into the jack, and the transmission assembly can be driven to resist, so that the internal components of the transmission assembly can be operated, and then the multiple elastic fixing parts can be driven to move toward the position of the RF power amplifier board inside the placement slot, and then the multiple elastic fixing parts can be pushed to the middle of the placement slot, and fixed by resistance, so as to achieve rapid fixation of the RF power amplifier board and improve the fixing speed of the RF power amplifier board. At the same time, after fixation, the elastic probe part can be prevented from being displaced during the resistance test of the RF power amplifier board, thereby improving the stability of the contact point of the elastic probe part during the test and the accuracy of the test results; 3. When the driving rod drives the transmission assembly downward, the internal components of the transmission assembly can synchronously drive the linkage parts, so that the internal components of the linkage parts operate, and then drive the shielding cover, so that the shielding cover rises from the inside of the storage cavity, and then moves toward the direction of the pressure plate. When the pressure plate is pressed down to drive the elastic probe part to contact the RF power amplifier board, the shielding cover contacts the bottom of the pressure plate, so that a closed space is formed at the placement slot, and the external electromagnetic waves are blocked by the shielding cover, and the external electromagnetic waves are blocked in cooperation with the fixing seat and the pressure plate, thereby reducing the possibility of electromagnetic waves being transmitted into the placement slot, thereby reducing the interference of electromagnetic waves on the RF power amplifier board during testing, reducing the error of test data, and improving test accuracy.

[0017] 4. When the fixing seat, the pressure plate and the shielding cover form a seal, the position of the pressure plate can be detected through the control box, and the fan group can be turned on so that the fan group draws external air into the placement slot to form wind, and cools the elastic probe member and the RF power amplifier board to reduce the possibility of the RF power amplifier board's component temperature rising too fast during testing and affecting performance or damage, thereby increasing the accuracy of the test. At the same time, the elastic probe member is cooled to prevent it from being slightly deformed due to sudden high temperature conduction during the contact test with the RF power amplifier board, thereby avoiding affecting the transmission of signals during the test and improving the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the present invention.

[0019] Figure 2 It is a schematic diagram of the closed structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the local structure of the fixing seat in the present invention.

[0021] Figure 4 It is a cross-sectional view of the fixing seat in the present invention.

[0022] Figure 5 It is a schematic diagram of the structure of the fixing seat in the present invention.

[0023] Figure 6This is a schematic diagram of the partial structure of the pressing plate in the present invention.

[0024] Figure 7 This is a schematic diagram of the structure of the elastic probe member in the present invention.

[0025] Figure 8 This is a schematic diagram of the structure of the transmission component in the present invention.

[0026] Figure 9 This is a schematic diagram of the structure of the elastic fixing member in the present invention.

[0027] Figure 10 This is a schematic diagram of the connection structure of the linkage member and the shielding cover in the present invention.

[0028] Figure 11 In the present invention Figure 10 The partial enlarged schematic diagram at position A.

[0029] In the figure: 1, fixed seat; 2, pressing plate; 3, elastic probe member; 4, transmission component; 5, elastic fixing member; 6, control box; 7, linkage member; 8, shielding cover; 9, drive rod; 11, placement groove; 12, jack; 13, storage cavity; 14, telescopic guide rod; 15, electric push rod; 21, fan group; 22, air guide cavity; 23, air outlet; 24, dust-proof net plate; 25, external box; 31, probe body; 32, limiting plate; 33, connecting wire; 34, spring one; 41, vertical rod; 42, spring two; 43, drive block; 44, push-pull rod; 45, force-bearing plate; 46, slider; 51, thrust block; 52, telescopic rod; 53, spring three; 54, clamping plate; 71, column; 72, linkage rod; 73, sliding groove. Specific embodiments

[0030] 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0031] Please refer to Figures 1 to 7, which is the first embodiment of the present invention, provides a technical solution: a test fixture for a radio frequency power amplifier board, including a fixed seat 1. On one side of the top of the fixed seat 1, symmetrically arranged telescopic guide rods 14 are fixedly connected. The top ends of the telescopic guide rods 14 are fixedly connected with a pressing plate 2. An electric push rod 15 is fixedly connected between the fixed seat 1 and the pressing plate 2. Metal coatings, such as silver plating, nickel plating and other metal materials, are added to the outsides of the fixed seat 1 and the pressing plate 2, which can form a shielding layer on the fixed seat 1 and the pressing plate 2, thereby blocking electromagnetic waves in the environment. A placement groove 11 is opened at the top of the fixed seat 1. A plurality of elastic probe members 3 are installed on the pressing plate 2, and an external connection box 25 is fixedly connected to the top of the pressing plate 2. One end of the elastic probe member 3 is connected to the external connection box 25. Here, by connecting to an external detection device through the external connection box 25, the signal of the external device is transmitted from the external connection box 25 to the elastic probe member 3, and the signal is transmitted to the radio frequency power amplifier board through the elastic probe member 3, so as to test the fixed radio frequency power amplifier board. Driving rods 9 are fixedly connected to both sides of the bottom of the pressing plate 2. An inner cavity is opened inside the fixed seat 1, and a transmission assembly 4 is fixedly connected in the inner cavity. Insertion holes 12 are opened on both sides of the fixed seat 1. The insertion holes 12 communicate with the inner cavity. The insertion holes 12 and the driving rods 9 are on the same axis, and the diameter of the insertion holes 12 is larger than the size of the driving rods 9, so that when the driving rods 9 are inserted into the insertion holes 12, there will be no jamming or blocking phenomenon. Elastic fixing members 5 are installed on the four sides inside the placement groove 11. The transmission assembly 4 is in transmission connection with the elastic fixing members 5. Linkage members 7 are installed on both sides inside the inner cavity. The linkage members 7 are in transmission connection with the transmission assembly 4. A storage cavity 13 is opened on the fixed seat 1. A shielding cover 8 is slidably connected inside the storage cavity 13. Here, the inner surface of the storage cavity 13 is treated smoothly, which can reduce the friction between the shielding cover 8 and the storage cavity 13, improve the smoothness of the movement of the shielding cover 8, and at the same time reduce the wear of the inner wall of the storage cavity 13 on the shielding cover 8 during the movement of the shielding cover 8. And the shielding cover 8 is made of metallic glass, which has high magnetic permeability and magnetic hysteresis loss, and can block surrounding electromagnetic waves. The linkage member 7 is in transmission connection with the shielding cover 8; Driven by the electric push rod 15, the pressing plate 2 is pressed downward toward the fixed seat 1. The pressing plate 2 drives the driving rod 9 to drive the transmission assembly 4, and then drives the elastic fixing member 5 to abut and fix the radio frequency power amplifier board. At this time, the transmission assembly 4 synchronously drives the linkage member 7 to lift the shielding cover 8 so that it contacts the pressing plate 2 pressing downward, forming a closure for the placement groove 11. At the same time, the moving pressing plate 2 drives the elastic probe member 3 to contact the radio frequency power amplifier board, completing the fixation of the radio frequency power amplifier board.

[0032] A cavity is opened inside the pressure plate 2, and the elastic probe member 3 includes a probe body 31 slidably connected to the inside of the pressure plate 2, and a limiting plate 32 is fixedly connected to the probe body 31, and a spring 34 is sleeved on the probe body 31, here, the spring 34 is located between the top wall in the cavity and the limiting plate 32, and the end of the spring 34 away from the pressure plate 2 is in contact with the top wall in the cavity, and then cooperates with the limiting plate 32 to achieve the elastic expansion and contraction effect of the probe body 31, and the end of the probe body 31 away from the limiting plate 32 is fixedly connected to the end of the probe body 31 away from the limiting plate 32. The end of the connecting line 33 away from the probe body 31 is connected to the external box 25, and a plurality of sliding holes are provided inside the external box 25 for cooperating with the sliding of the probe body 31 to realize the elastic expansion and contraction function of the probe body 31, and the connecting line 33 is rolled up inside the external box 25, and the rolled-up connecting line 33 will not interfere with the movement of the probe body 31.

[0033] When testing the RF power amplifier board, the RF power amplifier board can be placed inside the placement slot 11 first, and then, under the operation of the electric push rod 15, the pressure plate 2 can be driven to press down toward the fixing seat 1, thereby driving multiple probe bodies 31 to move toward the RF power amplifier board. As the pressure plate 2 is pressed down, the probe bodies 31 come into contact with the components on the RF power amplifier board, and then the external test equipment is connected to the external box 25, and the test signal is transmitted to the external box 25 through the external test equipment, and the signal is transmitted to the probe body 31 through the connecting line 33, and the signal is transmitted to the component through the probe body 31, and the RF power amplifier board can be tested. After the test, the pressure plate 2 is driven to lift upward through the operation of the electric push rod 15, so that the pressure plate 2 drives multiple probe bodies 31 to break away from the contact with the RF power amplifier board, and the RF power amplifier board inside the placement slot 11 can be manually taken out.

[0034] Before testing the RF power amplifier board, the limit plate 32 can be elastically squeezed by the elastic action of the spring 1 34, and then the probe body 31 can be placed on top, so that the probe body 31 is always in contact with the component. If it contacts a large-sized component, the probe body 31 is subjected to a reaction when contacting it, so that the probe body 31 shrinks inside the cavity, which can adapt to the large-sized component and will not affect the contact of other elastic probe parts 3 with the remaining components. In this way, it is ensured that each probe body 31 contacts each component on the RF power amplifier board, and the phenomenon of the probe body 31 not being in contact with the component is reduced, the output of the test signal is ensured, the test data error caused by the contact point deviation is eliminated to the maximum extent, and the accuracy of the test of the RF power amplifier board is improved. At the same time, because the spring 1 34 and the limit plate 32 are matched to make the probe body 31 form an elastic contact with the RF power amplifier board, the possibility of wear and deformation of the probe body 31 during long-term use or use is reduced, and the components on the RF power amplifier board will not be damaged due to excessive resistance during contact, thereby improving the stability and accuracy of the test results. Example 2

[0035] Please refer to Figure 8 and Figure 9 , which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the transmission assembly 4 includes a vertical rod 41 fixedly connected to the inner cavity. A driving member is slidably mounted on the vertical rod 41, and a second spring 42 is sleeved on the vertical rod 41. The second spring 42 is located below the driving member. Here, under the elastic action of the second spring 42, the reset of the driving member can be realized.

[0036] The driving member includes a driving block 43 penetrating and connected to the vertical rod 41. Push rods 44 are rotatably connected to the four sides of the driving block 43. One end of the push rod 44 away from the driving block 43 is rotatably connected to the elastic fixing member 5. Pressure members are installed at the bottom ends of the four sides of the driving block 43, and the pressure members are in transmission connection with the linkage member 7.

[0037] The elastic fixing member 5 includes a thrust block 51 slidably mounted on one side inside the fixed seat 1. A pair of symmetric elastic members are fixedly connected to one side of the thrust block 51. One end of the elastic member away from the thrust block 51 is fixedly connected to a clamping plate 54. The clamping plate 54 is located inside the placement groove 11. The bottom of the thrust block 51 is rotatably connected to the push rod 44. Here, a moving space for adapting to the movement of the thrust block 51 is provided inside the fixed seat 1, which facilitates the movement of the elastic fixing member 5. At the same time, the thrust block 51 is smooth-treated to reduce the friction with the moving space and improve the smoothness of the movement. And the outer surface of the clamping plate 54 is wrapped with a rubber layer, which has a certain elasticity and will not damage the edge of the RF power amplifier board when the clamping plate 54 abuts and fixes the RF power amplifier board.

[0038] The elastic member includes a telescopic rod 52 fixedly connected between the thrust block 51 and the clamping plate 54, and a third spring 53 is sleeved on the telescopic rod 52.

[0039] When the pressing plate 2 presses downwards, it can drive the driving rod 9 to move downwards and insert into the inside of the jack 12. Through the downward-moving driving rod 9, the pressing member can be extruded and driven, so that the pressing member drives the driving block 43 to move downwards on the vertical rod 41. The moving driving block 43 pulls a plurality of push-pull rods 44, so that the push-pull rods 44 rotate around the hinge point and pull the thrust block 51, so that the thrust block 51 drives the telescopic rod 52 and the clamping plate 54 to move towards the radio frequency power amplifier board, thereby driving the clamping plate 54 to abut and push the radio frequency power amplifier board. The radio frequency power amplifier board is pushed to the center position of the placement groove 11 by a plurality of clamping plates 54. At this time, the radio frequency power amplifier board is directly below a plurality of probe bodies 31, saving the time for people to manually adjust the position of the radio frequency power amplifier board. When the radio frequency power amplifier board is centered, the clamping plate 54 can continuously abut and squeeze the radio frequency power amplifier board, and then abut and fix it, thereby realizing the rapid fixation of the radio frequency power amplifier board, improving the fixation speed of the radio frequency power amplifier board. At the same time, after fixation, it can prevent the elastic probe member 3 from displacing when abutting and testing the radio frequency power amplifier board, thereby improving the stability of the contact point of the elastic probe member 3 during testing and the accuracy of the test results. Here, with the continuous push of the thrust block 51, since the clamping plate 54 abuts against the radio frequency power amplifier board, at this time, the distance between the thrust block 51 and the clamping plate 54 is shortened. At this time, under the elastic action of the third spring 53, the driving force applied to the thrust block 51 is buffered, thereby preventing the thrust block 51 from driving the clamping plate 54 to over-extrude the radio frequency power amplifier board and causing it to be damaged.

[0040] When the test of the radio frequency power amplifier board is completed, the upward movement of the pressing plate 2 can drive the driving rod 9 to move upwards. At this time, the pressing member loses the downward pressure of the driving rod 9. Under the elastic action of the second spring 42, the driving block 43 can be pushed upwards, so that the driving block 43 moves upwards, and then a plurality of push-pull rods 44 are pushed, so that the push-pull rods 44 push the thrust block 51, and then push it back into the moving space, completing the reset of the elastic fixing member 5, so that the radio frequency power amplifier board is released from the abutting and fixing state, facilitating people to take it out.

[0041] The rest of the structure is the same as that of Embodiment 1. Embodiment 3

[0042] Please refer to Figure 10 and Figure 11 As shown in [drawings], this is the third embodiment of the present invention. The difference between this embodiment and the first and second embodiments is that the linkage member 7 includes columns 71 symmetrically connected in the inner cavity. The top end of the column 71 is rotatably connected to a linkage rod 72. One side of the linkage rod 72 is rotatably connected to the shielding cover 8, and a chute 73 is provided at the end of the linkage rod 72 away from the shielding cover 8.

[0043] The pressure piece includes a force-bearing plate 45 fixedly connected to the bottom end of one side of the driving block 43. The end of the force-bearing plate 45 away from the driving block 43 is fixedly connected to a slider 46. The slider 46 is slidably installed inside the slide groove 73. Here, one end of the force-bearing plate 45 is on the same axis as the socket 12 and the driving rod 9, and the force-bearing plate 45 can be driven by the driving rod 9.

[0044] When the pressure plate 2 drives the driving rod 9 to press down, the driving rod 9 drives the force-bearing plate 45, so that the force-bearing plate 45 moves downward, thereby driving the driving block 43 to move downward, driving the push-pull rod 44 and the elastic fixing member 5. At the same time, when the force-bearing plate 45 moves, it will drive the slider 46 to move, so that the slider 46 slides inside the slide groove 73 and presses down one end of the linkage rod 72, so that the linkage rod 72 rotates on the column 71. At this time, the other end of the linkage rod 72 drives the shielding cover 8 to slide up and down inside the storage chamber 13. Start, move toward the direction of the pressure plate 2, when the pressure plate 2 drives the elastic probe member 3 to contact the RF power amplifier board, at this time, the shielding cover 8 is in contact with the pressure plate 2, and a closure is formed by the fixing seat 1, the pressure plate 2 and the shielding cover 8, so that a closed space is formed at the placement slot 11, and the shielding cover 8 blocks the external electromagnetic waves, and cooperates with the fixing seat 1 and the pressure plate 2 to block the external electromagnetic waves, reducing the possibility of electromagnetic waves being transmitted into the placement slot 11, thereby reducing the interference of electromagnetic waves on the RF power amplifier board during testing, reducing the error of test data, and improving test accuracy.

[0045] When the RF power amplifier board test is completed, the pressure plate 2 moves upward to drive the driving rod 9 to move upward. At this time, the spring 2 42 pushes the driving block 43 and drives the force plate 45 to move upward, thereby driving the slider 46 to lift one end of the linkage rod 72, so that the other end of the linkage rod 72 pulls down the shielding cover 8, and the shielding cover 8 can be retracted into the receiving cavity 13 to complete the reset.

[0046] The remaining structures are the same as those of embodiments 1 and 2. Example 4

[0047] See also Figure 2 and Figure 6, which is the third embodiment of the present invention. This embodiment is different from the first, second and third embodiments in that: a control box 6 is fixedly connected to one side of the telescopic guide rod 14, and fan groups 21 are installed on both sides of the pressure plate 2. The control box 6 is electrically connected to the fan group 21. Here, an infrared sensor and a controller are arranged inside the control box 6. The movement of the pressure plate 2 can be detected and sensed by the infrared sensor, and the opening and closing of the fan group 21 can be controlled by the controller. In addition, the position range of the control box 6 detection sensing can be set in advance, and the position reached by pressing the pressure plate 2 downward to form contact and closure with the shielding cover 8 is set as the sensing position. When the pressure plate 2 reaches the set sensing range, it can be detected by the infrared sensor, and the fan group 21 can be turned on by the controller. When the pressure plate 2 leaves the sensing range, the controller can control the fan group 21 to close.

[0048] Air guide cavities 22 are provided on both sides of the interior of the pressure plate 2, and the air guide cavity 22 is connected to the cavity. The fan group 21 is installed inside the air guide cavity 22. A plurality of air guide ports 23 are provided at the bottom of the pressure plate 2, and the air guide ports 23 are connected to the cavity. An air inlet is formed by the air guide cavity 22, the cavity and the air guide ports 23, so that the fan group 21 blows air into the placement slot 11 to cool down the contact part of the probe body 31 and the RF power amplifier board. Here, the air guide ports 23 are inclined, and the wind flow can be blown to the contact part of the probe body 31 through the inclined air guide ports 23, and then blown to the RF power amplifier board, so as to cool down the probe body 31 first to prevent its temperature from rising too fast and affecting signal transmission. A dustproof mesh plate 24 is fixedly connected to the end of the air guide cavity 22 away from the cavity. Here, the dustproof mesh plate 24 is woven with metal wire, which can block external dust and external electromagnetic waves at the same time, thereby reducing the entry of electromagnetic waves.

[0049] The position of the pressing plate 2 can be sensed through the control box 6. When the fixed seat 1, the pressing plate 2 and the shielding cover 8 form a closed state and the pressing plate 2 reaches the sensing position, at this time, the control box 6 can turn on the fan group 21, so that the fan group 21 sucks external air into the air guiding cavity 22 to form wind force, and blows it into the cavity interior, and enters the placement groove 11 through the air guiding port 23. When passing through the air guiding port 23 again, the inclined structure of the air guiding port 23 can first guide the wind to the probe body 31 to cool it, and then the wind naturally blows into the placement groove 11 to cool the radio frequency power amplifier board, thereby reducing the possibility that the temperature of the components of the radio frequency power amplifier board rises too fast during testing, which may affect the performance or cause damage, and increasing the test accuracy. At the same time, the probe body 31 is cooled and protected to prevent the probe body 31 from being slightly deformed due to sudden high-temperature conduction when it contacts and tests with the radio frequency power amplifier board, avoiding affecting the signal transmission during testing and improving the test accuracy. When the fan group 21 extracts external air, the air can pass through the dust-proof net plate 24, and the dust-proof net plate 24 can filter the dust in the air to prevent the dust from entering the placement groove 11, reducing the possibility that the dust falls on the radio frequency power amplifier board and affects the test accuracy.

[0050] When the test of the radio frequency power amplifier board is completed and the pressing plate 2 rises and gets out of the sensing range of the control box 6, at this time, the control box 6 can operate the fan group 21 to close, and then stop the delivery of the wind force.

[0051] The remaining structures are the same as those of Embodiments 1, 2, and 3.

[0052] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test fixture for a radio frequency power amplifier board, comprising a fixed seat (1), characterized in that: On one side of the top of the fixed seat (1), symmetric telescopic guide rods (14) are fixedly connected. The top ends of the telescopic guide rods (14) are fixedly connected with a pressing plate (2). An electric push rod (15) is fixedly connected between the fixed seat (1) and the pressing plate (2). A placement groove (11) is formed in the top of the fixed seat (1). A plurality of elastic probe members (3) are installed on the pressing plate (2), and an external connection box (25) is fixedly connected to the top of the pressing plate (2). One end of the elastic probe member (3) is connected to the external connection box (25). On both sides of the bottom of the pressing plate (2), driving rods (9) are fixedly connected. An inner cavity is formed in the fixed seat (1), and a transmission component (4) is fixedly connected in the inner cavity. Jacks (12) are formed on both sides of the fixed seat (1), and the jacks (12) communicate with the inner cavity. Elastic fixing members (5) are installed on the four sides inside the placement groove (11). The transmission component (4) is in transmission connection with the elastic fixing members (5). Linkage members (7) are installed on both sides inside the inner cavity. The linkage members (7) are in transmission connection with the transmission component (4). A storage cavity (13) is formed in the fixed seat (1), and a shielding cover (8) is slidably connected inside the storage cavity (13). The linkage members (7) are in transmission connection with the shielding cover (8); Driven by the electric push rod (15), the pressing plate (2) presses downward toward the fixed seat (1). The pressing plate (2) drives the driving rod (9) to drive the transmission component (4), and then drives the elastic fixing members (5) to abut and fix the RF power amplifier board. At this time, the transmission component (4) synchronously drives the linkage members (7) to lift the shielding cover (8) so that it contacts the pressing plate (2) that is pressed downward, forming a closure for the placement groove (11). At the same time, the moving pressing plate (2) drives the elastic probe members (3) to contact the RF power amplifier board, completing the fixation of the RF power amplifier board.

2. The test fixture for a radio frequency power amplifier board according to claim 1, wherein: A control box (6) is fixedly connected to one side of the telescopic guide rod (14). Fan groups (21) are installed on both sides of the pressing plate (2). The control box (6) is electrically connected to the fan groups (21).

3. The test fixture for a radio frequency power amplifier board according to claim 1, characterized in that: A cavity is formed inside the pressing plate (2). The elastic probe member (3) includes a probe body (31) slidably connected inside the pressing plate (2). A limiting plate (32) is fixedly connected to the probe body (31), and a first spring (34) is sleeved on the probe body (31). One end of the probe body (31) away from the limiting plate (32) is fixedly connected with a connecting wire (33). One end of the connecting wire (33) away from the probe body (31) is connected to the external connection box (25).

4. The RF power amplifier board test fixture according to claim 2, characterized in that: Air guide cavities (22) are formed on both sides inside the pressing plate (2). The air guide cavities (22) communicate with the cavity. The fan groups (21) are installed inside the air guide cavities (22). A plurality of air guide openings (23) are formed in the bottom of the pressing plate (2). The air guide openings (23) communicate with the cavity. A dust-proof net plate (24) is fixedly connected to one end of the air guide cavity (22) away from the cavity.

5. The RF power amplifier board test fixture according to claim 1, wherein: The transmission component (4) includes a vertical rod (41) fixedly connected to the inner cavity. A driving member is slidably mounted on the vertical rod (41), and a second spring (42) is sleeved on the vertical rod (41). The second spring (42) is located below the driving member.

6. The RF power amplifier board test fixture according to claim 5, wherein: The driving member includes a driving block (43) penetrating and connected to the vertical rod (41). Push-pull rods (44) are rotatably connected to the four sides of the driving block (43). One end of the push-pull rod (44) away from the driving block (43) is rotatably connected to the elastic fixing member (5). Pressure members are installed at the bottom ends of the four sides of the driving block (43), and the pressure members are in transmission connection with the linkage member (7).

7. The test fixture for a radio frequency power amplifier board according to claim 6, characterized in that: The elastic fixing member (5) includes a thrust block (51) slidably mounted on one side inside the fixed seat (1). A pair of symmetric elastic members are fixedly connected to one side of the thrust block (51). One end of the elastic member away from the thrust block (51) is fixedly connected to a clamping plate (54). The clamping plate (54) is located inside the placement groove (11). The bottom of the thrust block (51) is rotatably connected to the push-pull rod (44).

8. The test fixture for a radio frequency power amplifier board according to claim 7, wherein: The elastic member includes a telescopic rod (52) fixedly connected between the thrust block (51) and the clamping plate (54). A third spring (53) is sleeved on the telescopic rod (52).

9. The test fixture for a radio frequency power amplifier board according to claim 8, characterized in that: The linkage member (7) includes columns (71) symmetrically connected to the inner cavity. The top end of the column (71) is rotatably connected to a linkage rod (72). One side of the linkage rod (72) is rotatably connected to the shielding cover (8). A sliding groove (73) is formed at one end of the linkage rod (72) away from the shielding cover (8).

10. The test fixture for a radio frequency power amplifier board according to claim 9, characterized in that: The pressure member includes a force-bearing plate (45) fixedly connected to the bottom end of one side of the driving block (43). One end of the force-bearing plate (45) away from the driving block (43) is fixedly connected to a slider (46). The slider (46) is slidably mounted inside the sliding groove (73).

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