Signal leakage prevention clamp for testing surface-mounted filter

Abstract

The invention provides a signal leakage prevention clamp for testing a surface-mounted filter. The signal leakage prevention clamp comprises a first metal block, a second metal block, a flexible conductive adhesive tape, a first test board, a second test board, a probe and a signal leakage prevention assembly, a first test board and a plurality of probes arranged along a Y axis are sequentially arranged on the first metal block along the X axis, a flexible conductive adhesive tape, a plurality of probes arranged along the Y axis and a second test board are sequentially arranged on the second metal block along the X axis, and all the probes comprise input probes and output probes. The non-abutting sides of the input probe and the output probe are respectively provided with a signal leakage prevention assembly, and the non-abutting sides of the other probes are communicated with the test board at the corresponding positions. Through the arrangement of the structure, the signal leakage prevention assembly carries out signal shielding on the connecting positions of the input probe and the output probe and the corresponding cables, signal leakage of the high-frequency contact connecting part is reduced, and the flexible conductive adhesive tape ensures sufficient and good grounding performance of the grounding bonding pad of the surface-mounted filter.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and particularly to a signal leakage prevention fixture for testing surface-mounted filters. Background Art

[0002] For the debugging and testing of surface-mounted frequency hopping filters, traditional testing methods such as direct soldering involve directly soldering the cables or wires of the testing instrument onto the product pin pads, and then removing them after debugging. Although the contact is good, the continuous testing efficiency is low, it is extremely inconvenient to use, and it is easy to leave solder dross. For example, the comparative document with the publication number CN220381227 U discloses a testing tooling for an electrically tunable filter, which includes a PCB board. Fourteen welding pads are arranged on the PCB board, and the fourteen welding pads correspond to a total of fourteen terminals on the left and right sides of the electrically tunable filter. Among them, the welding pads for docking and grounding among the fourteen terminals are connected to the grounding copper foil on the back of the PCB board. Fixed-pin testing is carried out by welding, and then the welding points are loosened by means of a soldering gun or the like after testing; there is also a pressing type, which presses the two-side pads through a pressing strip or the like to achieve conduction with the contacts of the test board. The disadvantage is that it is easy to have poor contact in the contact conduction because it is a hard contact between two rigid planes and it is impossible to make all contacts closely connected; there is also a thimble type, where the needle outlet of the cable connecting the testing instrument is welded to the probe, but the function is not perfect enough, and there is still a large room for improvement in terms of durability, convenience, and signal common grounding; moreover, during testing, the transmission signal frequency is too high (especially at the output and input), resulting in signal leakage in the connection parts exposed to the air, thus leading to inaccurate test indicators or even completely unable to achieve the required test indicators. Summary of the Invention

[0003] The technical problem to be solved by the present invention lies in how to test the surface-mounted filter with high quality and no signal leakage through a fixture.

[0004] The present invention solves the above technical problem by the following technical means:

[0005] A signal leakage prevention fixture for testing surface-mounted filters, including a first metal block (3), a second metal block (4), a flexible conductive adhesive tape (7), a first test board (8), a second test board (9), a probe (12), and a signal leakage prevention component (13); a first test board (8) is sequentially arranged along the X-axis on the first metal block (3), and a plurality of probes (12) are arranged along the Y-axis. A flexible conductive adhesive tape (7), a plurality of probes (12) arranged along the Y-axis, and a second test board (9) are sequentially arranged along the X-axis on the second metal block (4). Among all the probes (12), there are input probes (12') and output probes. Signal leakage prevention components (13) are arranged on the non-contact sides of the input probes (12') and the output probes, and the non-contact sides of the remaining probes (12) are communicated with the test boards at corresponding positions.

[0006] Beneficial effects: Through the settings of the first metal block, the second metal block, the flexible conductive adhesive tape, the first test board, the second test board, the probes, and the anti-signal leakage components; each probe can tightly press against all the pins of the surface-mounted filter, enabling the two rows of pins on both sides of the surface-mounted filter to be in close contact and signal conduction with the probes at the corresponding positions. The non-contact sides of the input probe and the output probe are respectively fixed to the two cables of the peripheral test equipment through the anti-signal leakage components. The non-contact sides of the input probe and the output probe are respectively connected to the needle outlets of the two cables, and the non-contact sides of the remaining probes are connected to the test boards at the corresponding positions. The anti-signal leakage components can respectively shield the signals at the connections between the input probe, the output probe and the corresponding cables, reducing the signal leakage at the high-frequency contact connection part, thereby ensuring the maximum effectiveness and correctness of the product test indicators; the flexible conductive adhesive tape is different from the rigid metal surface, ensuring the full and good grounding of the grounding pads of the surface-mounted filter.

[0007] Further, each anti-signal leakage component (13) includes a connecting cylinder (131) and a metal cylinder (132). Each connecting cylinder (131) is hollow. Each connecting cylinder (131) is respectively sleeved on the rod bodies of the input probe (12’) and the output probe. One end of each connecting cylinder (131) close to the non-contact sides of the input probe (12’) and the output probe is fixed with a metal cylinder (132). The sizes of each metal cylinder (132) are larger than the sizes of the non-contact sides of the input probe (12’) and the output probe.

[0008] Beneficial effects: Through the settings of the connecting cylinder and the metal cylinder, the connecting cylinder is sleeved on the input probe and the output probe, and the metal cylinder is fixed on the connecting cylinder. The metal cylinder respectively wraps the connections between the input probe, the output probe and the corresponding cables, shielding the signals at the high-frequency contact connection part and reducing the signal leakage at the high-frequency contact connection part; the sizes of the metal cylinders are larger than the sizes of the non-contact sides of the input probe and the output probe, which can ensure that there is no contact between the metal cylinder and the connections between the input probe, the output probe and the corresponding cables, preventing short circuits.

[0009] Further, the inner layer of the connecting cylinder (131) is made of insulating material, and the outer layer of the connecting cylinder (131) is made of metal material.

[0010] Beneficial effects: Through the setting of the material of the connecting cylinder, the insulating material prevents the metal material from contacting the input probe and the output probe, resulting in short circuits, and the metal material can shield the signals and reduce signal leakage.

[0011] Further, the metal cylinder (132) is made of copper.

[0012] Beneficial effects: By making the metal cylinder of copper, the signal shielding effect of copper is better.

[0013] Further, a first mounting plate (10) is fixed to one end of the top wall of the first metal block (3) close to the second metal block (4). The first mounting plate (10) is made of insulating material. A plurality of probes (12) are sequentially arranged through the first mounting plate (10) along the Y-axis. The connecting cylinders (131) around the input probe (12') and / or the output probe are fixedly penetrated through the first mounting plate (10).

[0014] Further, a second mounting plate (11) is fixed to the middle of the top wall of the second metal block (4). The second mounting plate (11) is made of insulating material. A plurality of probes (12) are sequentially arranged through the second mounting plate (11) along the Y-axis. The connecting cylinders (131) around the input probe (12') and / or the output probe are fixedly penetrated through the second mounting plate (11).

[0015] Beneficial effects: Through the arrangement of the first mounting plate and the second mounting plate, two mounting plates with a row of holes drilled respectively are used to accurately position the positions of two rows of probes, making the probes receive uniform force and extending the service life of the probes.

[0016] Further, a push-pull mechanism (2) is further included. The output end of the push-pull mechanism (2) is fixed to the first metal block (3). The first metal block (3) is slidably connected to the second metal block (4) through a directional slide bar (5).

[0017] Beneficial effects: Through the arrangement of the push-pull mechanism and the directional slide bar, the push-pull mechanism can drive the first metal block to move away from or close to the second metal block smoothly.

[0018] Further, the push-pull mechanism (2) includes a mounting base (21), a push-pull rod (22), a linkage rod (23), and a handle (24). First mounting plates and second mounting plates are respectively fixed to both sides of the top wall of the mounting base (21). A handle (24) is hinged to the first mounting plate. A push-pull rod (22) is arranged through the second mounting plate along the X-axis. The end of the push-pull rod (22) far from the mounting base (21) is fixed to the first metal block (3). The free end of the push-pull rod (22) is hinged to a linkage rod (23). The free end of the linkage rod (23) is hinged to the handle (24).

[0019] Further, at least one directional slide bar (5) is fixed to the side wall of the first metal block (3) close to the second metal block (4). Chutes are opened on the side walls of the second metal block (4) close to the respective directional slide bars (5). The respective directional slide bars (5) are respectively slidably connected in the respective chutes.

[0020] Further, a flexible metal strip (6) is arranged between the first metal block (3) and the second metal block (4).

[0021] Beneficial effects: A flexible metal strip is provided between the first metal block and the second metal block, so that the separated first metal block and the second metal block have good ground signal common grounding property.

[0022] Furthermore, each probe (12) is a retractable probe, and the abutting side of each retractable probe is a telescopic part.

[0023] Furthermore, it further includes a mounting plate (1), and a pushing and pulling mechanism (2), a first metal block (3), and a second metal block (4) are sequentially arranged on the top wall of the mounting plate (1) along the X-axis.

[0024] Furthermore, the first test board (8) and the second test board (9) are both circuit boards. Description of the Drawings

[0025] Figure 1 It is a perspective view of the anti-signal leakage fixture (without the anti-signal leakage component) in the away state for testing the surface-mounted filter in the first embodiment of the present invention;

[0026] Figure 2 It is a perspective view of the anti-signal leakage fixture (without the anti-signal leakage component) in the close state for testing the surface-mounted filter in the first embodiment of the present invention;

[0027] Figure 3 It is an assembled perspective view of the second metal block and the flexible conductive adhesive tape in the anti-signal leakage fixture for testing the surface-mounted filter in the first embodiment of the present invention;

[0028] Figure 4 It is an assembled drawing of the input probe and the anti-signal leakage component in the anti-signal leakage fixture for testing the surface-mounted filter in the first embodiment of the present invention;

[0029] Figure 5 It is a process diagram of the assembly of the input probe and the anti-signal leakage component in the anti-signal leakage fixture for testing the surface-mounted filter in the first embodiment of the present invention. Detailed Embodiments

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment 1

[0032] As Figure 1 、 Figure 2 、 Figure 3As shown in the figure, this embodiment provides a fixture for preventing signal leakage in testing a surface-mounted filter, which includes a mounting plate 1, a push-pull mechanism 2, a first metal block 3, a second metal block 4, a directional sliding rod 5, a flexible metal strip 6, a flexible conductive adhesive tape 7, a first test board 8, a second test board 9, a first mounting plate 10, a second mounting plate 11, a probe 12, and a signal leakage prevention component 13.

[0033] As Figure 1 , Figure 2 shown in the figure, a push-pull mechanism 2, a first metal block 3, and a second metal block 4 are sequentially arranged along the X-axis on the top wall of the mounting plate 1. In this embodiment, the push-pull mechanism 2 is fixed on the top wall of the mounting plate 1, the first metal block 3 is slidably connected to the top wall of the mounting plate 1, and the second metal block 4 is fixed on the top wall of the mounting plate 1; the output end of the push-pull mechanism 2 is fixed on the first metal block 3, and the first metal block 3 is slidably connected to the second metal block 4 through the directional sliding rod 5. The push-pull mechanism 2 can drive the first metal block 3 to move away from or close to the second metal block 4, realizing the quick and convenient continuous clamping.

[0034] As Figure 1 , Figure 2 shown in the figure, a flexible metal strip 6 is fixed between the first metal block 3 and the second metal block 4, so that the separated first metal block 3 and second metal block 4 have good grounding signal common grounding property. In this embodiment, the flexible metal strip 6 is a copper braid with high copper purity and high conductivity.

[0035] As Figure 1 , Figure 2 shown in the figure, a first test board 8 is fixed on the top wall of the first metal block 3. In this embodiment, the first test board 8 is fixed on the top wall of the first metal block 3 by bolts, and a second test board 9 is fixed on the top wall on the side of the second metal block 4 away from the first metal block 3. In this embodiment, the second test board 9 is fixed on the second metal block 4 by bolts. Both the first test board 8 and the second test board 9 are circuit boards.

[0036] As Figure 1 , Figure 3 shown in the figure, a flexible conductive adhesive tape 7 is fixed in the middle of the top wall on the side of the second metal block 4 close to the first metal block 3. Different from the rigid metal surface, it ensures the full and good grounding of the grounding pad of the surface-mounted filter.

[0037] As Figure 1 , Figure 2 , Figure 4As shown in the figure, a first mounting plate 10 is fixed at one end of the top wall of the first metal block 3 close to the second metal block 4. A plurality of probes 12 are sequentially and fixedly penetrated along the Y-axis on the first mounting plate 10; a second mounting plate 11 is fixed in the middle of the top wall of the second metal block 4. A plurality of probes 12 are sequentially and fixedly penetrated along the Y-axis on the second mounting plate 11. Two mounting plates with a row of holes drilled respectively are used to accurately position the two rows of probes 12, so that the probes 12 are evenly stressed, extending the service life of the probes 12; among all the probes 12, there is an input probe 12' and an output probe. The input probe 12' and the output probe can be arranged on the same side or on both sides respectively. The non-contact sides of the input probe 12' and the output probe are both fixed to the two cables of the peripheral test equipment through the anti-signal leakage component 13. The non-contact sides of the remaining probes 12 are welded to the test board at the corresponding positions. Each probe 12 can tightly press all the pins of the surface-mounted filter, so that the two rows of pins on both sides of the surface-mounted filter are in close contact with the probes 12 at the corresponding positions and the signals are conducted; the first mounting plate 10 and the second mounting plate 11 are both made of insulating materials. In this embodiment, the first mounting plate 10 and the second mounting plate 11 are both acrylic plates; in this embodiment, the probe 12 is a telescopic probe, and the end of the telescopic probe close to the flexible conductive tape 7 is the telescopic part.

[0038] As Figure 4 , Figure 5 shown, the anti-signal leakage component 13 includes a connecting cylinder 131 and a metal cylinder 132. The connecting cylinder 131 is hollow. The inner layer of the connecting cylinder 131 is made of insulating material, and the outer layer of the connecting cylinder 131 is made of metal material. The connecting cylinder 131 is sleeved on the rod body of the input probe 12'. The connecting cylinder 131 penetrates through the mounting plate and is fixedly welded to the mounting plate on the outer layer; the non-contact side of the input probe 12' is connected to the cable needle outlet. The connection between the input probe 12' and the cable is fixedly wrapped by the metal cylinder 132, reducing the signal leakage of the high-frequency contact connection part, thereby ensuring the maximum effectiveness and correctness of the product test index. One end of the metal cylinder 132 is fixedly welded to the cable outer skin, and the other end of the metal cylinder 132 is fixedly welded to the outer layer of the connecting cylinder 131. The outer surface gap is completely sealed with solder, completely solving the problem of signal leakage; the metal cylinder 132 does not contact the non-contact side of the input probe 12' and the needle outlet of the cable, preventing short circuit. In this embodiment, the metal cylinder 132 is made of copper, preferably purple copper; the connection method between the output probe and the anti-signal leakage component 13 is the same as the connection method between the input probe 12' and the anti-signal leakage component 13.

[0039] As Figure 1 , Figure 2As shown, the push-pull mechanism 2 includes a mounting base 21, a push-pull rod 22, a linkage rod 23, and a handle 24. The mounting base 21 is fixed to the top wall of the mounting plate 1 by bolts. On both sides of the top wall of the mounting base 21, a first mounting plate and a second mounting plate are respectively fixed. The handle 24 is hinged on the first mounting plate. The push-pull rod 22 is disposed through the second mounting plate along the X-axis. The push-pull rod 22 can slide along the X-axis within the second mounting plate. One end of the push-pull rod 22 away from the mounting base 21 is fixed to the first metal block 3. The free end of the push-pull rod 22 is hinged to the linkage rod 23. The free end of the linkage rod 23 is hinged to the handle 24. By rotating the handle 24, the push-pull rod 22 can be driven to move along the X-axis through the linkage rod 23, thereby driving the first metal block 3 to move along the X-axis;

[0040] As Figure 1 , Figure 2 shown, at least one guiding slide bar 5 is fixed to the side wall of the first metal block 3 close to the second metal block 4. A chute is provided on the side wall of the second metal block 4 close to each guiding slide bar 5. Each guiding slide bar 5 is respectively slidably connected in each chute. In this embodiment, two guiding slide bars 5 are provided and fixed to the front and rear sides of the side wall of the first metal block 3. Both ends of the flexible metal strip 6 are respectively welded and fixed to the middle parts of the bottom walls of the first metal block 3 and the second metal block 4.

[0041] During use, the product to be tested is placed on the top wall of the second metal block 4 on the side close to the first metal block 3. The bottom ground pad of the product to be tested is mutually attached to the flexible conductive adhesive tape 7 on the top wall of the second metal block 4. A row of probes 12 on the second mounting plate 11 are mutually abutted and connected to a row of pins on one side of the product to be tested. The push-pull mechanism 2 drives the first metal block 3 to move towards the second metal block 4. When the first metal block 3 is pushed tightly against the second metal block 4, a row of probes 12 on the first mounting plate 10 are mutually abutted and connected to a row of pins on the other side of the product to be tested. Two cables of the external testing device are respectively connected to the input probe 12’ and the output probe through the anti-signal leakage component 13. The remaining probes 12 are all connected to the test board at the corresponding positions through the pads for testing.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A signal leakage prevention fixture for testing surface-mount filters, characterized in that: It comprises a first metal block (3), a second metal block (4), a flexible conductive adhesive tape (7), a first test board (8), a second test board (9), a probe (12), and a signal leakage prevention component (13); A first test board (8) and a plurality of probes (12) arranged along the Y axis are sequentially arranged on the first metal block (3) along the X axis, a flexible conductive adhesive tape (7), a plurality of probes (12) arranged along the Y axis, and a second test board (9) are sequentially arranged on the second metal block (4) along the X axis, all the probes (12) include input probes (12') and output probes, non-contacting sides of the input probes (12') and the output probes are both provided with signal leakage prevention components (13), and the non-contacting sides of the remaining probes (12) are connected to the test boards at corresponding positions.

2. The anti-signal leakage fixture for testing surface-mount filters according to claim 1, characterized in that: Each anti-signal leakage component (13) comprises a connecting tube (131) and a metal tube (132); each connecting tube (131) is hollow and is respectively sleeved on the rod of the input probe (12') and the output probe; a metal tube (132) is fixed to one end of each connecting tube (131) close to the non-contacting side of the input probe (12') and the output probe; and the size of each metal tube (132) is larger than the size of the non-contacting side of the input probe (12') and the output probe.

3. The anti-signal leakage fixture for testing surface-mount filters according to claim 2, characterized in that: The inner layer of the connecting tube (131) is made of insulating material, and the outer layer of the connecting tube (131) is made of metal material.

4. The anti-signal leakage fixture for testing surface-mount filters according to claim 2, characterized in that: The metal cylinder (132) is made of copper.

5. The anti-signal leakage fixture for testing surface-mount filters according to claim 2, characterized in that: A first mounting plate (10) is fixed on one end of the top wall of the first metal block (3) close to the second metal block (4); the first mounting plate (10) is made of insulating material; a plurality of probes (12) are sequentially arranged on the first mounting plate (10) along the Y axis; and a connecting tube (131) around the input probe (12') and / or the output probe is fixedly mounted on the first mounting plate (10).

6. The anti-signal leakage fixture for testing surface-mount filters according to claim 2, characterized in that: A second mounting plate (11) is fixed in the middle of the top wall of the second metal block (4); the second mounting plate (11) is made of insulating material; a plurality of probes (12) are sequentially arranged on the second mounting plate (11) along the Y axis; and a connecting tube (131) around the input probe (12') and / or the output probe is fixedly mounted on the second mounting plate (11).

7. The anti-signal leakage fixture for testing surface-mount filters according to claim 1, characterized in that: It also comprises a push-pull mechanism (2), the output end of which is fixed on a first metal block (3), and the first metal block (3) is slidably connected to a second metal block (4) via a directional sliding rod (5).

8. The anti-signal leakage fixture for testing a surface-mount filter according to claim 1, characterized in that: A flexible metal belt (6) is arranged between the first metal block (3) and the second metal block (4).

9. The anti-signal leakage fixture for testing surface-mount filters according to claim 1, characterized in that: Each probe (12) is a retractable probe, and the abutting side of each retractable probe is a retractable portion.

10. The anti-signal leakage fixture for testing surface-mount filters according to claim 1, characterized in that: The first test board (8) and the second test board (9) are both circuit boards.

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