Vehicle-mounted power amplifier of vehicle-mounted audio system

Abstract

The utility model discloses a vehicle-mounted power amplifier of a vehicle-mounted audio system, which comprises a cover plate, a circuit board and a radiator, the cover plate is fixedly connected with the radiator, an internal space is defined between the cover plate and the radiator, and the circuit board is arranged in the internal space; wherein a board end connector is arranged on the circuit board, the radiator comprises a substrate, a through hole for the board end connector to penetrate out is formed in the substrate, the radiator further comprises a baffle arranged around the board end connector, and the baffle and the substrate are fixedly connected or integrated. According to the vehicle-mounted power amplifier, the influence of external interference signals on the power amplifier is reduced, and meanwhile, the influence of the power amplifier on external electronic parts is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of loudspeakers, and particularly relates to a vehicle-mounted power amplifier for a vehicle audio system. Background Art

[0002] In the existing automotive aftermarket, the modification of automotive audio occupies a large share. A vehicle-mounted power amplifier must be used during the modification of a vehicle audio system. A vehicle-mounted power amplifier is an audio power amplifier in a vehicle audio and video system. Its function is to select and preprocess the input audio signal, perform power amplification, so that the electrical signal has the ability to drive the speaker.

[0003] The vehicle-mounted power amplifier includes a circuit board, and a board-end connector is provided on the circuit board. At present, the board-end connector is generally completely exposed on the circuit board, which makes the power amplifier vulnerable to external interference signals, and the internal radiation of the power amplifier is likely to interfere with other vehicle-mounted electronic components, resulting in an excessive EMC. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a vehicle-mounted power amplifier for a vehicle audio system, which reduces the influence of external interference signals on the power amplifier and reduces the influence of the power amplifier on external electronic components at the same time.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A vehicle-mounted power amplifier for a vehicle audio system includes a cover plate, a circuit board and a radiator. The cover plate and the radiator are fixedly connected, and an internal space is formed by enclosing between the cover plate and the radiator. The circuit board is arranged in the internal space. Wherein, a board-end connector is arranged on the circuit board. The radiator includes a substrate, and a through hole for the board-end connector to pass through is formed on the substrate. The radiator further includes a baffle arranged around the board-end connector, and the baffle is fixedly connected to or integral with the substrate.

[0007] In a preferred embodiment, the baffle encloses to form a channel, the main body part of the board-end connector is located in the channel, and the end of the board-end connector exposes from the channel. Most of the board-end connector is located in the channel, and only a small part of the board-end connector exposes from the channel, reducing the influence of external interference signals on the power amplifier and having a better EMC at the same time.

[0008] In a preferred embodiment, the baffle extends inwards from the substrate, and the through hole constitutes the outlet of the channel. The end of the board-end connector exposes from the outlet.

[0009] In a preferred embodiment, the baffle continuously surrounds the board-end connector for one week. It can greatly reduce the influence of external interference signals on the power amplifier.

[0010] In a preferred embodiment, the gap between the baffle and the board end connector is less than 0.5 mm. The small gap between the baffle and the board end connector can effectively reduce the influence of external interference signals on the power amplifier and reduce the influence of the power amplifier on external electronic components.

[0011] In a preferred embodiment, the board end connector is fixed on the circuit board for accessing the sound source signal of the vehicle audio system and electrically connecting to the vehicle speaker.

[0012] In a more preferred embodiment, at least one of the board end connectors is fixed on the circuit board, and at least one of the board end connectors is electrically connected to the vehicle speaker.

[0013] In a preferred embodiment, the radiator includes a plurality of heat dissipation fins extending outward from the substrate. The heat dissipation fins are used to dissipate heat from the components on the circuit board.

[0014] In a preferred embodiment, the length of the board end connector extending outside the substrate is less than the length of the heat dissipation fins.

[0015] In a preferred embodiment, the radiator has an inner cavity, and the radiator further includes a plurality of limiting columns disposed in the inner cavity. One end of the limiting column is connected to the substrate, and the other end of the limiting column extends inward and contacts or faces the circuit board.

[0016] In a preferred embodiment, the cover plate, the circuit board, and the substrate are fixed by screws, and the entire circuit board is enclosed in the internal space.

[0017] The present utility model adopts the above solutions and has the following advantages compared with the prior art:

[0018] For the vehicle power amplifier of the present utility model, the circuit board is arranged in the internal space surrounded by the cover plate and the radiator. The baffle on the circuit board surrounds the board end connector, and only a small part of the board end connector passes through the through hole. Compared with the case where the board end connector is entirely exposed on the circuit board, this can effectively reduce the influence of external interference signals on the power amplifier and also reduce the influence of the power amplifier on external electronic components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 Schematic diagram of a vehicle-mounted power amplifier according to an embodiment of the present utility model;

[0021] Figure 2 is Figure 1 Cross-sectional view along the A-A direction in

[0022] Figure 3 Exploded schematic diagram of the vehicle-mounted power amplifier;

[0023] Figure 4 Schematic diagram of the radiator.

[0024] Wherein,

[0025] 1. Cover plate;

[0026] 2. Circuit board; 21. Board-end connector;

[0027] 3. Radiator; 31. Substrate; 311. Through hole; 32. Baffle; 321. Channel; 33. Heat dissipation fin; 34. Inner cavity; 341. Limit post;

[0028] 4. Internal space; 5. Screw. Detailed implementation manners

[0029] The following elaborates on the preferred embodiments of the present utility model in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art. It should be noted here that the description of these embodiments is for helping to understand the present utility model, but does not constitute a limitation to the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0030] The vehicle-mounted power amplifier of the prior art includes a circuit board and a board-end connector provided on the circuit board. The board-end connector is completely exposed on the circuit board, which inevitably has some drawbacks. For example, the power amplifier is easily affected by external interference signals, the internal radiation of the power amplifier is likely to interfere with other vehicle-mounted electronic components, resulting in EMC exceeding the standard, and dust and other particles are easily introduced into the power amplifier, affecting the service life of components, etc.

[0031] Referring to Figures 1 to 4 as shown, the present embodiment provides a vehicle-mounted power amplifier for a vehicle audio system, including a cover plate 1, a circuit board 2 and a radiator 3. The circuit board 2 is located between the cover plate 1 and the radiator 3.

[0032] Further, the radiator 3 includes a base plate 31. The cover plate 1, the circuit board 2, and the base plate 31 are fixedly connected. Specifically, the cover plate 1, the circuit board 2, and the base plate 31 are fixedly connected by a plurality of screws 5. An internal space 4 is formed by enclosing between the cover plate 1 and the radiator 3. The circuit board 2 is disposed in the internal space 4. Further, the entire circuit board 2 is enclosed in the internal space 4, which can reduce the risk of small particulate debris entering the power amplifier, increase the contact area between the radiator 3 and the circuit board 2, improve the heat dissipation effect, and at the same time enhance the support of the radiator 3 for the circuit board 2, making the circuit board 2 not easily deformed.

[0033] A board-end connector 21 is provided on the circuit board 2. The function of providing a board-end connector on the circuit board is to connect the internal circuit and the external circuit on the circuit board, improve the connection efficiency, and reduce errors and damages caused by manual operations. Specifically in this embodiment, the board-end connector 21 is fixed to the circuit board 2 for accessing the sound source signal of the vehicle audio system and being electrically connected to the vehicle speaker.

[0034] The number of the board-end connectors 21 is multiple. At least one board-end connector 21 is connected to the sound source signal, and at least one board-end connector 21 is connected to the vehicle speaker. Specifically in this embodiment, referring to Figure 4 as shown, the number of the board-end connectors 21 is two. One of the board-end connectors accesses the sound source signal of the vehicle audio system, and the other board-end connector is connected to the vehicle speaker. After the sound source signal is amplified, it is transmitted to the vehicle speaker and the sound is emitted through the vehicle speaker.

[0035] Combined with Figure 3 and Figure 4 as shown, the radiator 3 includes a baffle 32 and a plurality of heat dissipation fins 33 extending outward from the base plate 31. A heat dissipation channel is formed between two adjacent heat dissipation fins 33. Further, through holes 311 for the board-end connectors 21 to pass through are formed on the base plate 31. The number of the through holes 311 corresponds to the number of the board-end connectors 21, that is, the number of the through holes 311 is two. The baffle 32 and the base plate 31 are fixedly connected or integrally formed. Specifically in this embodiment, the baffle 32 and the base plate 31 are integrally formed. In other embodiments, the baffle 32 and the base plate 31 may also be fixedly connected.

[0036] Further, the baffle 32 is disposed around the board-end connector 21. More specifically, the baffle 32 continuously surrounds the board-end connector 21 for one week. The baffle 32 encloses a channel 321. When the circuit board 2 is installed on the radiator 3, the main body part of the board-end connector 21 is located in the channel 321, and the end of the board-end connector 21 exposes from the channel 321, that is, most of the board-end connectors are located inside the channel, and only a small part of the board-end connectors expose from the channel 321, which can effectively reduce the influence of external interference signals on the power amplifier.

[0037] The length by which the board - end connector 21 extends outside the substrate 31 is less than the length of the heat - dissipation fins 33. The main body part of the board - end connector 21 is shielded by the baffle 32 and is not completely exposed on the circuit board 2. Compared with the prior art, it can reduce the influence of external interference signals on the power amplifier; the gap between the baffle 32 and the board - end connector 21 is less than 0.5 mm, and the connection between the baffle 32 and the board - end connector 21 is relatively tight, with strong anti - interference ability; the baffle 32 extends inwards from the substrate 31, and the through - hole 311 forms the outlet of the channel 321. The main body part of the board - end connector 21 is located in the channel, and only the end is exposed from the outlet of the channel, which can not only reduce the influence of external interference signals on the power amplifier, but also reduce the influence of the power amplifier on external electronic components.

[0038] The radiator 3 has an inner cavity 34. The radiator 3 further includes a plurality of limit posts 341 disposed in the inner cavity 34, and the number of the limit posts 341 is two. One end of each limit post 341 is connected to the substrate 31, and the other end of the limit post 341 extends inwards and contacts or faces the circuit board 2. When the circuit board 2 is installed in the inner cavity 34 of the radiator 3, the limit posts 341 can effectively play a role in limiting and positioning.

[0039] For the in - vehicle power amplifier of this embodiment, during assembly, first, the circuit board 2 is placed into the inner cavity 34 of the radiator 3 through the limit posts 341. The board - end connector 21 on the circuit board 2 enters the channel 321, and the end of the board - end connector 21 is exposed from the channel. Then, the cover plate 1 is covered on the circuit board 2, and the cover plate 1, the circuit board 2, and the substrate 31 are fixedly connected by a plurality of screws 5.

[0040] An internal space 4 is formed between the cover plate 1 and the radiator 3. The entire circuit board 2 is enclosed in the internal space 4. The main body part of the board - end connector 21 on the circuit board 2 is disposed in the channel 321 surrounded by the baffle 32, and the end is exposed from the through - hole 311. Compared with the prior art where the radiator is disposed on the circuit board and the entire board - end connector is directly exposed on the circuit board, it can greatly reduce the influence of external interference signals on the power amplifier.

[0041] The in - vehicle power amplifier of this embodiment has at least the following advantages:

[0042] (1) Reduce the influence of external interference signals on the power amplifier; (2) Reduce the influence of the power amplifier on external electronic components; (3) Reduce the risk of small particulate debris entering the power amplifier; (4) Increase the grounding area of the power amplifier; (5) Enhance the support of the radiator for the circuit board, making the circuit board not easily deformed; (6) Increase the contact area between the radiator and the circuit board, improving the heat - dissipation effect.

[0043] As shown in this specification and the claims, the terms "comprising" and "including" merely indicate the inclusion of the explicitly identified steps and elements, and these steps and elements do not constitute an exclusive listing. A method or device may also include other steps or elements. The term "and / or" as used herein includes any combination of one or more of the related listed items.

[0044] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the descriptions such as up, down, left, and right used in the present utility model are only relative to the mutual positional relationship of the components of the present utility model in the drawings.

[0045] The above embodiments are only for illustrating the technical concept and features of the present utility model and are a preferred embodiment. The purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly, and it should not be used to limit the protection scope of the present utility model. Any equivalent transformation or modification made according to the principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A vehicle-mounted power amplifier for a vehicle audio system, comprising a cover plate, a circuit board and a radiator, characterized in that, The cover plate and the radiator are fixedly connected, and an internal space is formed by enclosing between the cover plate and the radiator, and the circuit board is disposed in the internal space; wherein, a board-end connector is provided on the circuit board, the radiator includes a substrate, and a through hole for the board-end connector to pass through is formed on the substrate, and the radiator further includes a baffle disposed around the board-end connector, and the baffle is fixedly connected to or integral with the substrate.

2. The vehicle-mounted power amplifier according to claim 1, wherein The baffle encloses to form a channel, a main body portion of the board-end connector is located in the channel, and an end of the board-end connector is exposed from the channel.

3. The vehicle-mounted power amplifier according to claim 2, characterized in that The baffle extends inwards from the substrate, and the through hole constitutes an outlet of the channel.

4. The vehicle-mounted power amplifier according to claim 1, wherein The baffle continuously surrounds the board-end connector for one week.

5. The vehicle-mounted power amplifier according to claim 1, characterized in that, A gap between the baffle and the board-end connector is less than 0.5 mm.

6. The vehicle-mounted power amplifier according to claim 1, wherein The board-end connector is fixed on the circuit board for accessing a sound source signal of an in-vehicle audio system and electrically connecting to an in-vehicle speaker.

7. The vehicle-mounted power amplifier according to claim 1, characterized in that, The radiator includes a plurality of heat dissipation fins extending outwards from the substrate.

8. The vehicle-mounted power amplifier according to claim 7, wherein, A length of the board-end connector extending to the outside of the substrate is less than a length of the heat dissipation fins.

9. The vehicle-mounted power amplifier according to claim 1, characterized in that, The radiator has an inner cavity, and the radiator further includes a plurality of limiting posts disposed in the inner cavity, one end of the limiting post is connected to the substrate, and the other end of the limiting post extends inwards and contacts or faces the circuit board.

10. The vehicle-mounted power amplifier according to claim 1, wherein, The cover plate, the circuit board and the substrate are fixed by screws, and the circuit board is entirely enclosed in the internal space.

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