A test fixture for a circulator

Abstract

The present invention relates to the technical field of test fixtures, and in particular to a test fixture for a circulator, comprising a grounding conductor, a PCB test board, and a clamping assembly, wherein the grounding conductor is provided with a positioning hole, wherein a spring ejector is provided in the positioning hole, wherein the spring ejector is aligned with a PIN pin of the circulator to be tested, and one end of the spring ejector is connected to the inner wall of the positioning hole, and the other end can extend out of the positioning hole or retract into the positioning hole; the PCB test board is placed above and supported by the grounding conductor, and the circulator to be tested is placed on the PCB test board, wherein the PCB test board is provided with a non-enclosed hollow structure, wherein the hollow structure is provided with PIN pin pads aligned with the PIN pins, and the hollow structure is capable of elastic deformation; and the clamping assembly applies a force directed toward the PCB test board to the circulator to be tested. The present invention causes the hollow structure on the PCB test board, which contacts the PIN pin, to elastically deform by providing the spring ejector, thereby ensuring that the PIN pins are in contact with the PIN pin pads on the hollow structure.

Description

Technical Field

[0001] The present invention relates to the technical field of test fixtures, and in particular to a test fixture for a circulator. Background Art

[0002] Flatness refers to the deviation of the macroscopic height of bumps and depressions on a workpiece substrate from an ideal flat surface. Since a circulator is applied with a layer of solder paste on the PCB test board during use, the structural design allows for a flatness of 0.1mm between the bottom of the circulator's pins and the lower end face of the circulator's housing. However, conventional test fixtures can only test circulators where the bottom of the pins is lower than the lower end face of the housing. If the bottom of the pins is higher than the lower end face of the housing, the bottom of the pins cannot contact the pin pads on the PCB test board, making it impossible to complete the circulator function test. Summary of the Invention

[0003] The object of the present invention is to provide a test fixture for a circulator, which ensures that no matter the bottom of the PIN pin is higher than or lower than the lower end surface of the shell, the PIN pin can be in contact with the PIN pin pad.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A test fixture for a circulator, comprising:

[0006] A grounding conductor, wherein the grounding conductor is provided with a positioning hole, wherein a spring-loaded ejector pin is provided in the positioning hole, wherein the spring-loaded ejector pin is aligned one-to-one with the PIN pin of the circulator to be tested, wherein one end of the spring-loaded ejector pin is connected to the inner wall of the positioning hole, and the other end of the spring-loaded ejector pin can extend out of the positioning hole or be completely retracted into the positioning hole;

[0007] a PCB test board, the PCB test board being placed above and supported by the ground conductor, the circulator to be tested being placed on the PCB test board, the PCB test board being provided with a non-enclosed hollow portion to form a hollow structure at least partially connected to the PCB test board, the hollow structure being provided with PIN pin pads that are aligned one-to-one with the PIN pins, and the hollow structure being capable of elastic deformation to warp upward or sag downward;

[0008] A pressing assembly is used to apply a force directed toward the PCB test board to the circulator to be tested.

[0009] Preferably, the circulator test fixture further comprises a positioning block, wherein the positioning block is provided with an annular groove, and the annular groove fits with the outer surface of the circulator to be tested and is used for positioning the circulator to be tested.

[0010] Preferably, a positioning groove is provided on the positioning block, and a positioning protrusion is provided on the circulator to be tested, and the positioning protrusion is plugged into the positioning groove so that the PIN pins and the PIN pin pads are aligned one by one.

[0011] Preferably, the positioning block is detachably connected to the PCB test board.

[0012] Preferably, the PCB test board is detachably connected to the ground conductor.

[0013] Preferably, the pressing assembly comprises:

[0014] Mounting rack;

[0015] a pressing handle, the pressing handle having a first end and a second end disposed opposite to each other, the first end being hinged to the mounting bracket;

[0016] a connecting rod, one end of which is hinged to the pressing handle, and a hinge point between the connecting rod and the pressing handle is located between the first end and the second end;

[0017] A transmission rod group slides vertically through the mounting frame, the upper end of the transmission rod group is hinged to the other end of the connecting rod, and the lower end of the transmission rod group is connected to a clamping plate, which faces the circulator to be tested.

[0018] Preferably, a mounting groove is provided at the lower end of the transmission rod group, and the upper end of the pressing plate is inserted into the mounting groove and slidably connected to the mounting groove;

[0019] The transmission rod group is provided with a waist-shaped hole that penetrates along its radial direction and extends in the vertical direction, and the clamping plate is provided with a through hole. The waist-shaped hole and the through hole are connected by a pin shaft so that the transmission rod group can be lifted and lowered relative to the clamping plate.

[0020] Preferably, a pressing groove is provided at the lower end of the pressing plate to match the upper end of the circulator to be tested.

[0021] Preferably, the bottom surface area of ​​the pressing plate is larger than the top surface area of ​​the annular device to be tested.

[0022] Preferably, the grounding conductor is a copper block.

[0023] Beneficial effects of the present invention: The present invention provides positioning holes on a ground conductor, spring pins are provided in the positioning holes, and spring pins are provided in the positioning holes. A non-enclosed hollow is provided on a PCB test board to form a hollow structure at least partially connected to the PCB test board. PIN pin pads are provided on the hollow structure, and the PIN pins are provided in a one-to-one relationship with the PIN pins. The hollow structure can undergo elastic deformation to ensure that each PIN pin is in good contact with the PIN pin pad on the hollow structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is an exploded view of a test fixture for a circulator provided by the present invention;

[0025] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 is a top view of the PCB test board provided by the present invention;

[0027] Figure 4 It is a cross-sectional view of the test fixture of the circulator provided by the present invention.

[0028] In the picture:

[0029] 1. Ground conductor; 11. Positioning hole; 12. Spring thimble;

[0030] 2. PCB test board; 21. Hollow structure;

[0031] 3. Clamping assembly; 31. Pressing handle; 32. Connecting rod; 33. Transmission rod assembly; 34. Clamping plate; 35. Mounting bracket;

[0032] 4. Positioning block;

[0033] 5. Circulator to be tested. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only show portions relevant to the present invention, not all of them.

[0035] like Figures 1 to 4As shown, this embodiment provides a circulator test fixture, comprising a grounding conductor 1, a PCB test board 2, and a clamping assembly 3. The grounding conductor 1 is provided with a positioning hole 11, within which a spring-loaded pin 12 is disposed. The spring-loaded pin 12 aligns directly with the pins of the circulator 5 under test, and one end of the spring-loaded pin 12 is connected to the inner wall of the positioning hole 11. The PCB test board 2 is placed above and supported by the grounding conductor 1. The circulator 5 under test is placed on the PCB test board 2. The PCB test board 2 is provided with a non-enclosed hollow structure 21, which is at least partially connected to the PCB test board 2. The hollow structure 21 is provided with pin pads that align directly with the pins. The hollow structure 21 is elastically deformable to tilt upward or dent downward. The clamping assembly 3 is used to apply a force directed toward the PCB test board 2 to the circulator 5 under test. In this embodiment, the circulator 5 under test has three pins, and the grounding conductor 1 is a copper block.

[0036] When the bottom of the PIN pins of the circulator 5 to be tested is higher than the lower end surface of the housing, the other end of the spring pin 12 can extend out of the positioning hole 11 and abut against the hollow structure 21, causing the hollow structure 21 to bulge upward, so that each PIN pin contacts the PIN pin pad on the hollow structure 21. When the bottom of the PIN pins of the circulator 5 to be tested is lower than the lower end surface of the housing, under the action of the clamping assembly 3, the spring pin 12 is completely retracted into the positioning hole 11, becoming concave or level with the hollow structure 21, so that each PIN pin contacts the PIN pin pad on the hollow structure 21. Specifically, the elastic force of the spring pin 12 is determined by the force required to deform the hollow structure 21.

[0037] In this embodiment, a positioning hole 11 is provided on the ground conductor 1. A spring-loaded ejector pin 12 is disposed in the positioning hole 11, aligned one-to-one with the PIN pins. A non-enclosed hollow portion is provided on the PCB test board 2 to form a hollow structure 21 at least partially connected to the PCB test board 2. PIN pin pads are disposed on the hollow structure 21, aligned one-to-one with the PIN pins. The hollow structure 21 is elastically deformable to ensure that each PIN pin is in good contact with the PIN pin pad on the hollow structure 21.

[0038] Furthermore, the circulator test fixture includes a positioning block 4, which is provided with an annular groove that engages with the outer surface of the circulator under test 5 to prevent the center of the circulator under test 5 from moving on the PCB test board 2. Furthermore, the positioning block 4 is also provided with a positioning groove. Accordingly, the circulator under test 5 is provided with a positioning protrusion that engages with the positioning groove to prevent the circulator under test 5 from moving circumferentially on the PCB test board 2, thereby ensuring that the PIN pins and PIN pin pads are aligned one by one.

[0039] Furthermore, the positioning block 4 is detachably connected to the PCB test board 2, which is convenient for disassembly. When the size of the circulator 5 to be tested is different, the positioning block 4 matching the size of the circulator 5 to be tested can be replaced to facilitate accurate positioning.

[0040] Furthermore, the PCB test board 2 is detachably connected to the grounding conductor 1, which is convenient for disassembly. When the size of the circulator 5 to be tested is different, the PCB test board 2 that matches the PIN pin position of the circulator 5 to be tested can be replaced, so that the PIN pin pads on the hollow structure 21 are aligned one by one with the PIN pin position of the circulator 5 to be tested.

[0041] Furthermore, the pressing assembly 3 includes a mounting bracket 35, a pressing handle 31, a connecting rod 32, and a transmission rod group 33. The pressing handle 31 has a first end and a second end that are arranged opposite each other, and the first end is hinged to the mounting bracket 35. One end of the connecting rod 32 is hinged to the pressing handle 31, and the hinge point between the connecting rod 32 and the pressing handle 31 is located between the first end and the second end. The transmission rod group 33 slides vertically through the mounting bracket 35. The upper end of the transmission rod group 33 is hinged to the other end of the connecting rod 32, and the lower end of the transmission rod group 33 is connected to a pressing plate 34, which is opposite to the annular device 5 to be tested. Pressing the pressing handle 31 drives the transmission rod group 33 to move via the connecting rod 32. The mounting bracket 35 not only fixes the transmission rod group 33 but also guides the transmission rod group 33, allowing it to move vertically.

[0042] Furthermore, a mounting slot is provided at the lower end of the transmission rod assembly 33, into which the upper end of the pressure plate 34 is inserted and slidably connected. A compression spring is sandwiched between the upper end of the pressure plate 34 and the lower surface of the top end of the mounting slot. The transmission rod assembly 33 is provided with a waist-shaped hole extending radially through it and vertically, and the pressure plate 34 is provided with a through hole. The waist-shaped hole and the through hole are connected by a pin shaft, allowing the transmission rod assembly 33 to be raised and lowered relative to the pressure plate 34. When the transmission rod assembly 33 moves downward, the pressure plate 34 also moves downward. When the pressure plate 34 contacts the annular device 5 to be tested, the transmission rod assembly 33 can still move downward relative to the pressure plate 34. After contacting the pressure plate 34, downward pressure is applied to the pressure plate 34, so that the force on the pressure plate 34 is more uniform.

[0043] Furthermore, a clamping groove is provided at the lower end of the clamping plate 34 to match the upper end of the circulator 5 to be tested. Specifically, the bottom surface area of ​​the clamping plate 34 is larger than the top surface area of ​​the circulator 5 to be tested, preventing the circulator 5 to be tested from being damaged when the pressure is too high.

[0044] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0045] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0046] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A test fixture for a circulator, characterized in that: include: A grounding conductor (1), wherein a positioning hole (11) is provided on the grounding conductor (1), a spring thimble (12) is provided in the positioning hole (11), the spring thimble (12) is aligned one-to-one with the PIN pin of the circulator (5) to be tested, one end of the spring thimble (12) is connected to the inner wall of the positioning hole (11), and the other end can extend out of the positioning hole (11) or be completely retracted into the positioning hole (11); A PCB test board (2), the PCB test board (2) being placed above the ground conductor (1) and supported by the ground conductor (1), the circulator to be tested (5) being placed on the PCB test board (2), the PCB test board (2) being provided with a non-enclosed hollowing to form a hollow structure (21) at least partially connected to the PCB test board (2), the hollow structure (21) being provided with PIN pin pads facing each other one by one with the PIN pins, the hollow structure (21) being capable of elastic deformation to warp upward or sag downward; A pressing assembly (3), the pressing assembly (3) being used to apply a force directed toward the PCB test board (2) to the circulator to be tested (5); and A positioning block (4) is provided with an annular groove, the annular groove is fitted with the outer surface of the circulator to be tested (5) and is used to position the circulator to be tested (5), the positioning block (4) is provided with a positioning groove, the circulator to be tested (5) is provided with a positioning protrusion, the positioning protrusion is plugged into the positioning groove so that the PIN pins and the PIN pin pads are aligned one by one, and the positioning block (4) is detachably connected to the PCB test board (2).

2. The test fixture for a circulator according to claim 1, wherein: The PCB test board (2) is detachably connected to the grounding conductor (1).

3. The test fixture for a circulator according to claim 1, wherein: The pressing assembly (3) comprises: Mounting frame (35); A pressing handle (31), the pressing handle (31) having a first end and a second end arranged opposite to each other, the first end being hinged to the mounting frame (35); a connecting rod (32), one end of the connecting rod (32) being hinged to the pressing handle (31), and a hinge point between the connecting rod (32) and the pressing handle (31) being located between the first end and the second end; A transmission rod group (33) is provided, wherein the transmission rod group (33) slides in a vertical direction and passes through the mounting frame (35), the upper end of the transmission rod group (33) is hinged to the other end of the connecting rod (32), and the lower end of the transmission rod group (33) is connected to a pressing plate (34), and the pressing plate (34) faces the annular device (5) to be tested.

4. The test fixture for a circulator according to claim 3, wherein: The lower end of the transmission rod group (33) is provided with a mounting groove, and the upper end of the pressing plate (34) is inserted into the mounting groove and is slidably connected to the mounting groove; The transmission rod group (33) is provided with a waist-shaped hole penetrating in its radial direction and extending in the vertical direction, and the pressing plate (34) is provided with a through hole. The waist-shaped hole and the through hole are connected by a pin shaft so that the transmission rod group (33) can be raised and lowered relative to the pressing plate (34).

5. The test fixture for a circulator according to claim 3, wherein: The lower end of the pressing plate (34) is provided with a pressing groove, which matches the upper end of the annular device (5) to be tested.

6. The test fixture for a circulator according to claim 3, wherein: The bottom surface area of ​​the pressing plate (34) is larger than the top surface area of ​​the annular device (5) to be tested.

7. The test fixture for a circulator according to any one of claims 1 to 6, characterized in that: The grounding conductor (1) is a copper block.

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