Test tool for surface acoustic wave filter

Abstract

The utility model relates to a test tool for a surface acoustic wave filter, and solves the problem that the conventional surface acoustic wave filter is inaccurate and inconvenient to test. Comprising a base, a supporting device, a positioning device, a testing EVB plate and a testing cover plate, the supporting device comprises an insulating base and a supporting frame, the testing EVB plate is arranged on the supporting frame, the testing cover plate is arranged on the testing EVB plate, the testing cover plate and the testing EVB plate are electrically conducted through a conductive piece, the positioning device comprises a pressing rod, a spring and a sleeve, and the pressing rod is arranged on the supporting frame. And a sleeve driving mechanism for driving the sleeve to move up and down is also arranged on the base. During testing, the extension of the spring is adjusted through the pressure adjusting mechanism so as to adjust the pressure of the pressing rod, the sleeve driving mechanism drives the sleeve to move upwards to drive the pressing rod to be lifted, then a device to be tested is placed in the device positioning groove, the sleeve driving mechanism drives the sleeve to move downwards, and the pressing rod presses and positions the device to be tested. Therefore, the conduction between the test device and the test EVB circuit board is tested, and the test is accurate and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of radio frequency passive device testing, and particularly relates to a SAW filter testing tooling. Background Art

[0002] A surface acoustic wave filter is a microwave frequency selection device used in the fields of signal processing and communication. It has the advantages of small size, high operating frequency, low insertion loss, excellent frequency selection characteristics, and low production cost, and is widely used in various electronic devices represented by mobile phones. At present, surface acoustic wave filters generally adopt a surface mount packaging method, and the connection with the external path is realized through the housing pins of the ceramic substrate. Since the pin size is small, it is more sensitive to the contact position and pressure during electrical performance testing. Especially during manual testing, the testing speed and the accuracy of the testing results are greatly affected, and the testing difficulty is relatively high. Content of the Utility Model

[0003] The purpose of the utility model is to solve the problems of inaccurate and inconvenient testing of existing surface acoustic wave filters.

[0004] The technical solution adopted to solve the technical problems proposed by the utility model is as follows: The SAW filter testing tooling of the utility model includes a base, a support device, a positioning device, a test EVB board, and a test cover plate. The support device includes an insulating seat and a support frame. The insulating seat is arranged on the base, and the support frame is arranged on the insulating base. The test EVB board is arranged on the support frame, and the test cover plate is arranged on the test EVB board. The test cover plate and the test EVB board are electrically connected through a conductive part. The positioning device includes a pressure rod, a spring, and a sleeve. The sleeve is slidably connected to the base up and down. The pressure rod is slidably arranged at the bottom of the sleeve. One end of the spring is connected to the sleeve, and the other end of the spring is connected to the pressure rod through a pressure adjustment mechanism for adjusting the pressure of the pressure rod. A sleeve driving mechanism for driving the sleeve to move up and down is also arranged on the base. A device positioning groove for testing device positioning is arranged on the test cover plate corresponding to the pressure rod.

[0005] The technical solutions for further limiting the utility model include:

[0006] A 7-shaped cavity bracket is fixedly arranged on the base. The positioning device is arranged in the cavity of the 7-shaped cavity bracket. The pressure rod passes through the 7-shaped bracket, and the sleeve driving mechanism is arranged at the top of the 7-shaped cavity bracket.

[0007] The sleeve driving mechanism includes a V-shaped pressing plate. The middle part of the V-shaped pressing plate is rotationally connected to the base through a rotating shaft. One side of the V-shaped pressing plate is fixedly connected to the sleeve. When the V-shaped pressing plate is not subjected to external force, the side of the V-shaped pressing plate where the sleeve is fixed is horizontally attached to the top surface of the base.

[0008] The described V-shaped pressing plate is provided with an oblong hole for cooperating with the sleeve.

[0009] The described pressure regulating mechanism includes an adjusting nut. The spring is connected to the pressure rod through the adjusting nut. An external threaded column cooperating with the adjusting nut is provided on the pressure rod. The adjusting nut is arranged on the external threaded column, and the bottom end of the spring is fixedly connected to the nut.

[0010] The described device positioning groove includes a misaligned hole provided on the test cover plate and a positioning cavity provided at the center of the misaligned hole. The size of the misaligned hole is larger than the outer peripheral size of the pressure rod.

[0011] The described base is provided with a lead screw driving mechanism for driving the insulating seat to move forward, backward, left, and right. The lead screw driving mechanism includes a first lead screw, a first slide bar, a slider bracket, a second lead screw, and a second slide bar. The first lead screw and the first slide bar are both arranged on the base. The first lead screw and the first slide bar are arranged in parallel. The slider bracket is slidably arranged on the first slide bar. A first threaded hole cooperating with the first lead screw is provided on the sliding bracket. The second lead screw and the second slide bar are arranged in parallel. The second lead screw and the first lead screw are arranged perpendicular to each other. The insulating seat is slidably arranged on the second slide bar. A second threaded hole cooperating with the second lead screw is provided on the insulating seat.

[0012] One end of the described first lead screw is provided with a first knob, and one end of the described second lead screw is provided with a second knob.

[0013] The described conductive part is vertical conductive adhesive.

[0014] The described insulating seat is a bakelite insulating seat.

[0015] Through the above technical solutions, the beneficial effects of the present utility model are as follows: When the surface acoustic wave filter test tooling of the present utility model is tested, the elongation of the spring is adjusted through the pressure regulating mechanism to adjust the pressure of the pressure rod. The sleeve driving mechanism drives the sleeve to move upward to drive the pressure rod to lift. Then, the device to be tested is placed in the device positioning groove. The sleeve driving mechanism drives the sleeve to move downward, and the pressure rod presses and positions the device to be tested, so as to conduct electricity between the test device and the test EVB circuit board for testing, and the testing is accurate and convenient. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a surface acoustic wave filter test tooling of the present utility model.

[0017] Figure 2 It is a schematic structural diagram of the test cover plate of a surface acoustic wave filter test tooling of the present utility model. Detailed Embodiments

[0018] The following further describes the structure of the present utility model with reference to the drawings.

[0019] Reference Figure 1 and Figure 2 , a surface acoustic wave filter test fixture includes a base 1, a support device 2, a positioning device 3, a test EVB board 4, and a test cover plate 5. The support device 2 includes an insulating base 21 and a support frame 22. The insulating base is provided on the base, and the support frame is provided on the insulating base. The test EVB board 4 is provided on the support frame 22, and the test cover plate is provided on the test EVB board. The test cover plate and the test EVB board are electrically connected through a conductive member. The positioning device 3 includes a pressure rod 31, a spring 32, and a sleeve 33. The sleeve is slidably connected to the base up and down. The pressure rod is slidably provided at the bottom of the sleeve. One end of the spring is connected to the sleeve, and the other end of the spring is connected to the pressure rod through a pressure adjustment mechanism 6 for adjusting the pressure of the pressure rod. A sleeve drive mechanism 7 for driving the sleeve to move up and down is also provided on the base. A device positioning groove 51 for positioning the test device is provided on the test cover plate 5 corresponding to the pressure rod. In this embodiment, the test EVB board and the test cover plate are connected to the base by screws, so that they can be easily replaced as needed. The conductive member is a vertical conductive adhesive. The insulating base is a bakelite insulating base. The device positioning groove 51 includes a misalignment hole 511 provided on the test cover plate and a positioning cavity 512 provided at the center of the misalignment hole. The size of the misalignment hole is larger than the outer peripheral size of the pressure rod to cooperate with the downward pressing action of the pressure rod. The positioning cavity is used for positioning the test device. During the test, the elongation of the spring is adjusted through the pressure adjustment mechanism to adjust the pressure of the pressure rod. The sleeve drive mechanism drives the sleeve to move upward to drive the pressure rod to lift, and then the device to be tested is placed in the device positioning groove. The sleeve drive mechanism drives the sleeve to move downward, and the pressure rod presses and positions the device to be tested, so as to conduct the test by connecting the test device and the test EVB circuit board. The test is accurate and convenient.

[0020] In this embodiment, the pressure adjustment mechanism 6 includes an adjustment nut. The spring is connected to the pressure rod through the adjustment nut. An external threaded column cooperating with the adjustment nut is provided on the pressure rod 31, and the adjustment nut is provided on the external threaded column. The bottom end of the spring is fixedly connected to the nut. When the adjustment nut is adjusted upward, the spring is compressed and the pressure of the spring becomes larger, so that the pressure of the pressure rod becomes larger. When the adjustment nut is adjusted downward, the spring elongates and the pressure of the spring becomes smaller. Thus, different pressures can be adjusted according to different devices. Make the pressure of the device appropriate and the test accurate.

[0021] In this embodiment, the sleeve driving mechanism 7 includes a V-shaped pressing plate. The middle of the V-shaped pressing plate is rotatably connected to the base through a rotating shaft 71. One side of the V-shaped pressing plate is fixedly connected to the sleeve. When the V-shaped pressing plate is not subjected to external force, the side of the V-shaped pressing plate where the sleeve is fixed is horizontally attached to the top surface of the base. When pressing the side of the V-shaped pressing plate away from the sleeve, the V-shaped pressing plate rotates around the rotating shaft to drive the sleeve to move upward. The sleeve drives the pressing rod to move upward, and the pressing rod disengages from the device. At this time, the device can be unloaded. When testing is required, the device is placed in the device positioning groove, and the V-shaped pressing plate is released. Under the action of gravity, the V-shaped pressing plate resets, and the pressing rod presses and positions the device to be tested.

[0022] In this embodiment, a long circular hole 72 matching the sleeve is provided on the V-shaped pressing plate 7, and the sleeve is fixedly connected to the V-shaped pressing plate through a nut. Thus, the installation position of the sleeve can be adjusted through the long circular hole to meet the test requirements of different devices.

[0023] In this embodiment, a 7-shaped cavity bracket 11 is fixedly provided on the base 1. The positioning device is arranged in the cavity of the 7-shaped cavity bracket. The pressing rod passes through the 7-shaped bracket. The sleeve driving mechanism is arranged on the top of the 7-shaped cavity bracket. The sleeve is slidably arranged on the top of the 7-shaped cavity bracket. One side of the V-shaped pressing plate is located on the top of the 7-shaped cavity bracket. The rotating shaft 71 is located on the 7-shaped cavity bracket. The top of the sleeve is fixedly connected to the V-shaped pressing plate. The sleeve is inserted into the 7-shaped cavity bracket, and the spring is located in the 7-shaped cavity bracket. Thus, the overall structure is compact and occupies a small space.

[0024] In this embodiment, a lead screw driving mechanism 8 for driving the insulating seat to move forward, backward, left and right is provided on the base 1. The lead screw driving mechanism 8 includes a first lead screw 81, a first slide bar 82, a slider bracket 83, a second lead screw 84 and a second slide bar 85. A U-shaped bracket is fixedly provided on the base. The first lead screw 81 and the first slide bar 82 are both arranged on the U-shaped bracket. The first lead screw and the first slide bar are arranged in parallel. The slider bracket is slidably arranged on the first slide bar. A first threaded hole matching the first lead screw is provided on the sliding bracket. The second lead screw and the second slide bar are arranged in parallel. The second lead screw and the first lead screw are arranged perpendicular to each other. The insulating seat 21 is slidably arranged on the second slide bar. A second threaded hole matching the second lead screw is provided on the insulating seat. A first knob 811 is provided at one end of the first lead screw 81, and a second knob 841 is provided at one end of the second lead screw 84. By rotating the first knob, the first lead screw drives the sliding bracket to move along the first lead screw, and the sliding bracket drives the insulating block to move along the first lead screw. By rotating the second knob, the second lead screw drives the insulating block to move along the second lead screw. Thus, the position of the device to be tested relative to the pressing rod can be adjusted, so that the testing of different specifications of devices can be applied, and the testing is convenient.

[0025] Although the specific embodiments of the present utility model have been described in detail with reference to the accompanying drawings, it should not be construed as a limitation on the protection scope of the present utility model. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative efforts still fall within the protection scope of the present utility model.

Claims

1. A SAW filter test tool, characterized in that: The test tooling includes a base, a supporting device, a positioning device, a test EVB board and a test cover plate. The supporting device includes an insulating seat and a supporting frame. The insulating seat is arranged on the base, and the supporting frame is arranged on the insulating base. The test EVB board is arranged on the supporting frame, and the test cover plate is arranged on the test EVB board. The test cover plate and the test EVB board are electrically conductive through a conductive member. The positioning device includes a pressure rod, a spring and a sleeve. The sleeve is slidably connected to the base up and down, and the pressure rod is slidably arranged at the bottom of the sleeve. One end of the spring is connected to the sleeve, and the other end of the spring is connected to the pressure rod through a pressure regulating mechanism for adjusting the pressure of the pressure rod. The base is also provided with a sleeve driving mechanism for driving the sleeve to move up and down, and a device positioning groove for positioning the test device is provided on the test cover corresponding to the pressure rod.

2. A SAW filter testing tool as claimed in claim 1, characterized in that: A 7-shaped cavity bracket is fixedly arranged on the base, the positioning device is arranged in the cavity of the 7-shaped cavity bracket, the pressure rod passes through the 7-shaped bracket, and the sleeve driving mechanism is arranged on the top of the 7-shaped cavity bracket.

3. A SAW filter testing tool as claimed in claim 1, characterized in that: The sleeve driving mechanism includes a V-shaped pressure plate, the middle part of which is rotatably connected to the base through a rotating shaft, and one side of the V-shaped pressure plate is fixedly connected to the sleeve. When the V-shaped pressure plate is not subjected to external force, one side of the V-shaped pressure plate that fixes the sleeve is horizontally fitted with the top surface of the base.

4. A SAW filter testing tool as claimed in claim 3, characterized in that: The V-shaped pressing plate is provided with an oblong hole which matches with the sleeve.

5. The SAW filter test tool as claimed in claim 1, characterized in that: The pressure regulating mechanism includes an adjusting nut, the spring is connected to the pressure rod through the adjusting nut, the pressure rod is provided with an external thread column matching the adjusting nut, the adjusting nut is arranged on the external thread column, and the bottom end of the spring is fixedly connected to the nut.

6. A SAW filter testing tool as claimed in claim 1, characterized in that: The device positioning groove comprises a dislocation hole arranged on the test cover plate and a positioning cavity arranged at the center of the dislocation hole. The size of the dislocation hole is larger than the outer circumference size of the pressure rod.

7. A SAW filter testing tool as claimed in claim 1, characterized in that: The base is provided with a screw drive mechanism for driving the insulating seat to move forward, backward, left and right. The screw drive mechanism includes a first screw, a first slide rod, a slider bracket, a second screw and a second slide rod. The first screw and the first slide rod are both arranged on the base, the first screw and the first slide rod are arranged in parallel, the slider bracket is slidably arranged on the first slide rod, and a first threaded hole matching the first screw rod is provided on the sliding bracket. The second screw and the second slide rod are arranged in parallel, and the second screw and the first screw rod are arranged vertically. The insulating seat is slidably arranged on the second slide rod, and the insulating seat is provided with a second threaded hole matching the second screw.

8. A SAW filter testing tool as claimed in claim 7, characterized in that: A first knob is disposed at one end of the first screw rod, and a second knob is disposed at one end of the second screw rod.

9. A SAW filter testing tool as claimed in claim 1, characterized in that: The conductive element is a vertical conductive adhesive.

10. The SAW filter testing tool as claimed in claim 1, characterized in that: The insulating seat is a bakelite insulating seat.

Images