Power amplifier mainboard test fixture

Abstract

The utility model relates to a power amplifier mainboard test fixture, which comprises a test machine base, a test platform, a test gland, a bayonet socket, a standard bayonet socket and a jacking and pressing assembly, the test gland comprises an outer gland and an inner pressing frame, the inner pressing frame is movably connected with a hinge seat arranged on the rear side of the test machine base, and the inner pressing frame is arranged inside the outer gland. A pressing plate is arranged on the lower end face of the outer gland, a plurality of probes are arranged at the power connection end, directly facing components of the power amplifier circuit board to be tested, of the pressing plate, electrical conduction is achieved through contact, the test platform is provided with a positioning base of the power amplifier circuit board, and the jacking pressing assembly comprises a jacking air cylinder, a jacking plate and a guide rod and guide sleeve assembly. According to the test fixture, the replaceable positioning base is matched with a power amplifier circuit board of a to-be-tested model to carry out a closed simulation car audio system test, power connection simulation use test is carried out on batch power amplifier circuit boards one by one, the performance of each power amplifier circuit board is ensured to reach the standard, the reliability, the safety and the stability of products are ensured, and the test efficiency is improved. And the qualified rate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic detection equipment, in particular to a test fixture for a power amplifier main board. Background Art

[0002] The market share of automobiles has been increasing year by year, and the growth rate of the number of private cars has increased. Higher technical requirements are put forward for the automobile industrial production, and the production capacity needs to be further improved. Similarly, higher technical requirements are also imposed on the safety, stability and intelligence of the vehicle's electrical control system. At present, the progress of in-vehicle electrical control intelligence is rapid, and the electronic intelligence levels of in-vehicle audio, central control screens, atmosphere lights, etc. are getting higher and higher. Especially in the audio system, the audio power is getting higher and higher, and the power requirement for the power amplifier is even higher. Therefore, the performance stability of the power amplifier circuit board needs to be tested. For this reason, we need to specially design a device for automatically detecting the in-vehicle power amplifier circuit board to ensure that each power amplifier circuit board in batch production is subjected to performance detection one by one. Content of the Utility Model

[0003] The purpose of the utility model is as follows: In view of the need for necessary performance detection of each power amplifier circuit board applied to the in-vehicle audio system before production and shipment, we design a test fixture for the power amplifier main board to ensure that the performance of each power amplifier circuit board meets the standard, guarantee the safety, stability and intelligence of the product, improve the passing rate of the product at the factory, and prevent the defective power amplifier circuit board from being put into the automobile market.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A test fixture for a power amplifier main board includes a test machine base, a test platform, a test pressure cover, a plug-in seat, a standard plug-in seat, and a top pressure boosting and closing component.

[0006] A test platform is arranged in the middle of the upper end surface of the test machine base, and a hinge seat is arranged at the rear end. The hinge seat movably hinges the test pressure cover to the test machine base to assist the test pressure cover to be tightly closed on the test platform after flipping.

[0007] The test pressure cover includes an outer pressure cover and an inner pressure frame. The inner pressure frame is movably hinged to the hinge seat arranged at the rear side of the test machine base. The inner pressure frame is arranged inside the outer pressure cover. A pressure plate is arranged on the lower end surface of the outer pressure cover. A plurality of probes are arranged on the pressure plate facing the power connection ends of the components of the power amplifier circuit board to be tested, and electrical conduction is realized by the probes contacting the power connection ends.

[0008] The test platform is provided with a positioning base for the power amplifier circuit board. The positioning base is provided with a positioning groove and a positioning pin. The positioning groove is provided with a sinking contour around the outer periphery of the power amplifier circuit board to ensure the preliminary positioning of the power amplifier circuit board. Then, the positioning pin is used to position the positioning hole of the power amplifier circuit board. On the rear side of the test platform, there is a socket that cooperates with various power connection sockets provided on the power amplifier circuit board to be tested. The socket is provided with a docking plug facing each power connection socket. The docking plug is connected to a standard socket through a wire, and the standard socket is plugged and matched with a standard plug equipped with a test instrument to achieve electrical conduction.

[0009] The top pressing and closing assembly is arranged below the positioning base and includes a lifting cylinder, a top pushing plate, and a guide rod and guide sleeve assembly. The lifting rod of the lifting cylinder drives the top pushing plate. Guide rod and guide sleeve assemblies are arranged at the four corners of the top pushing plate to limit and maintain the lifting and sliding movement, and lift the positioning base upward, closely attach the power amplifier circuit board upward to the pressing plate, and cause several probes to be electrically connected to the component power connection ends of the power amplifier circuit board to be tested.

[0010] Further, a spring is arranged between the pressing plate and the probe.

[0011] Further, the outer pressure cover fits the upper end surface of the test machine base and applies a downward pressing force.

[0012] Further, an air pressure valve is arranged on the rear side of the test machine base.

[0013] Further, the four corners of the positioning base are sleeved on the guide rods of the guide rod and guide sleeve assembly.

[0014] Compared with the prior art, the present utility model adopts the above technical solutions and has the following technical effects:

[0015] The power amplifier main board test fixture can perform a closed-loop simulation of the car audio system test on the power amplifier circuit board to be tested by matching the replaceable positioning base with the power amplifier circuit board of the model to be tested, and conduct power connection simulation use tests one by one on the batch of power amplifier circuit boards leaving the factory to ensure that the performance of each power amplifier circuit board meets the standards, as well as the reliability, safety, and stability of the product, and improve the qualified rate of the product leaving the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a right-side top view of the power amplifier main board test fixture of this embodiment;

[0017] Figure 2 It is a side top view of the partially disassembled power amplifier main board test fixture of this embodiment;

[0018] Figure 3 It is a side top view of the pressing plate of this embodiment;

[0019] Figure 4The right top view of the power amplifier main board test fixture of this embodiment;

[0020] Figure 5 is Figure 3 the partial enlarged view of the place A in

[0021] Wherein: 1 - test pressing cover, 2 - test base, 3 - inner pressing frame, 4 - spring, 5 - hinge seat, 6 - pushing plate, 7 - lifting cylinder, 8 - guide rod and guide sleeve assembly, 9 - positioning base, 10 - pneumatic valve, 11 - first standard socket, 12 - second standard socket, 13 - third standard socket, 14 - power amplifier circuit board, 15 - positioning groove, 16 - docking plug. Specific implementation manner

[0022] Next, in combination with the description of the drawings, the technical solutions of the present invention will be clearly and completely described in the form of embodiments.

[0023] Please refer to Figures 1 to 5 , this embodiment provides a power amplifier main board test fixture, including a test base 2, a test platform, a test pressing cover 1, a socket, a standard socket, and a lifting and pressing assembly. The lifting and pressing assembly is arranged below the positioning base 9 and includes a lifting cylinder 7, a pushing plate 6, and a guide rod and guide sleeve assembly 8. The lifting rod of the lifting cylinder 7 drives the pushing plate 6. Guide rod and guide sleeve assemblies 8 are arranged at the four corners of the pushing plate 6 to define and maintain the lifting and sliding movement, lift the positioning base 9 upward, press the power amplifier circuit board 14 upward to closely fit with the pressing plate, and cause several probes to be electrically conducted with the component power connection terminals of the power amplifier circuit board 14 to be tested.

[0024] Refer to Figure 2 and Figure 3 , after opening the outer pressing cover and observing the internal structure of the inner pressing frame level, a test platform is arranged in the middle of the upper end surface of the test base 2, and a hinge seat 5 is arranged at the rear end. The hinge seat 5 movably hinges the test pressing cover 1 and the test base 2 to assist the test pressing cover 1 to be tightly closed on the test platform after flipping.

[0025] Refer to Figure 2 and Figure 3 , in order to simulate the actual use situation of the power amplifier circuit board, the test pressing cover 1 includes an outer pressing cover and an inner pressing frame 3. The outer pressing cover fits the upper end surface of the test base 2 and applies a downward pressing force to ensure that the power amplifier circuit board 14 to be tested is sealed in the test platform, so as to simulate the sealed environment where the actual power amplifier circuit board 14 is installed in the vehicle head unit console. The inner pressing frame 3 is movably connected to the hinge seat 5 arranged at the rear side of the test base 2. The inner pressing frame 3 is arranged inside the outer pressing cover. A pressing plate is arranged on the lower end surface of the outer pressing cover. Several probes are arranged on the pressing plate facing the power connection terminals of the components of the power amplifier circuit board 14 to be tested, and are used to detect voltage, current, and power-on and power-off signals after being electrically conducted in cooperation with the test instrument.

[0026] Refer to Figure 3 and Figure 5 In order to quickly detect each power amplifier circuit board and accurately position the adapted power amplifier circuit board, the test platform is provided with a positioning base 9 for the power amplifier circuit board 14. The positioning base 9 is provided with a positioning groove 15 and positioning pins. The positioning groove 15 is provided with a sinking contour around the outer periphery of the power amplifier circuit board 14 to ensure the preliminary positioning of the power amplifier circuit board 14. Further, the positioning pins are positioned opposite the positioning holes of the power amplifier circuit board 14. At the rear side of the test platform, there is a socket adapted to cooperate with various power connection sockets provided on the power amplifier circuit board 14 to be tested. The socket is provided with a docking plug 16 opposite each power connection socket. The docking plug 16 is connected to a standard socket through a wire, and the standard socket is plugged and mated with a standard plug equipped with a test instrument to achieve electrical conduction.

[0027] Refer to Figure 5 In order to ensure that each probe can elastically contact the power connection end of the component on the power amplifier circuit board, a spring 4 is provided between the pressing plate and the probe to achieve soft contact and not damage the component.

[0028] Refer to Figure 4 In order to provide stable air pressure for the lifting cylinder, a pneumatic valve 10 is provided at the rear side of the test machine base 2 to control the pushing air pressure of the lifting cylinder 7.

[0029] Refer to Figure 5 In order to replace the adapted positioning base 9 according to the different model sizes of different in-vehicle power amplifier circuit boards 14, the four corners of the positioning base 9 are sleeved on the guide rods of the guide rod and guide sleeve assembly 8.

[0030] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes, modifications, substitutions, and variations can be made without departing from the spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power amplifier motherboard test fixture, comprising a test base (2), a test platform, a test gland (1), a socket, a standard socket, and a lifting and pressing assembly, characterized in that: The test pressure cover (1) comprises an outer pressure cover and an inner pressure frame (3), wherein the inner pressure frame (3) is movably connected to a hinged seat (5) arranged at the rear side of the test machine base (2), and the inner pressure frame (3) is arranged inside the outer pressure cover, and a pressing plate is arranged on the lower end surface of the outer pressure cover, and a plurality of probes are arranged on the pressing plate at the power connection end of the components of the power amplifier circuit board (14) to be tested, and the probes contact the power connection end to achieve electrical conduction. The test platform is provided with a positioning base (9) for the power amplifier circuit board (14), and a socket matched with various power sockets provided on the power amplifier circuit board (14) to be tested is provided at the rear side of the test platform, and a docking plug (16) is provided on the socket directly opposite to each power socket, and the docking plug (16) is connected to the standard socket through a wire, and the standard socket is plugged with a standard plug equipped with a test instrument to achieve electrical conduction, The lifting and pressing assembly is arranged below the positioning base (9), and comprises a lifting cylinder (7), a pushing plate (6) and a guide rod and guide sleeve assembly (8). The lifting rod of the lifting cylinder (7) drives the pushing plate (6), and the guide rod and guide sleeve assemblies (8) are arranged at the four corners of the pushing plate (6). The positioning base (9) is lifted upward, the power amplifier circuit board (14) is tightly fitted upward with the pressing plate, and a plurality of probes are electrically connected with the electrical terminals of the components of the power amplifier circuit board (14) to be tested.

2. The power amplifier motherboard test fixture according to claim 1, characterized in that: A test platform is provided in the middle of the upper end surface of the test machine base (2), and a hinge seat (5) is provided at the rear end. The hinge seat (5) movably hinges the test pressure cover (1) and the test machine base (2).

3. The power amplifier motherboard test fixture according to claim 1, characterized in that: A spring (4) is arranged between the pressing plate and the probe.

4. The power amplifier motherboard test fixture according to claim 1, characterized in that: The outer pressure cover is fitted to the upper end surface of the test machine base (2) and is pressed downward.

5. The power amplifier motherboard test fixture according to claim 1, characterized in that: The positioning base (9) is provided with a positioning groove (15) and a positioning pin. The positioning groove (15) is provided with a sunken profile around the periphery of the power amplifier circuit board (14). The positioning pin is positioned directly against the positioning hole of the power amplifier circuit board (14) for positioning.

6. The power amplifier motherboard test fixture according to claim 1, characterized in that: An air pressure valve (10) is arranged on the rear side of the test machine base (2).

7. The power amplifier motherboard test fixture according to claim 1, characterized in that: The four corners of the positioning base (9) are sleeved on the guide rods of the guide rod and guide sleeve assembly (8).

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