Power amplifier with good protection effect

Abstract

The utility model provides a power amplifier with a good protection effect, which relates to the field of power amplifiers, and comprises a power amplifier main body, a plurality of interfaces are arranged on the back of the power amplifier main body, and a plurality of rows of heat dissipation holes are arranged on the back of the power amplifier main body. A mounting frame is fixedly mounted at the edge of the area, located at the multiple rows of heat dissipation holes, of the back of the power amplifier body, a driving device and a baffle are mounted in the mounting frame, a plurality of through holes corresponding to the multiple rows of heat dissipation holes are formed in the baffle, and movable plates used for shielding the through holes are movably connected to the upper portions of the multiple through holes of the baffle; according to the power amplifier main body with the good protection effect, when the power amplifier main body is used, the movable plates rotate through the driving device, the movable plates are moved away from the through holes of the baffles, the through holes of the baffles are exposed to the outer side, and therefore the power amplifier main body is protected. And when the power amplifier main body is in a shutdown state, the movable plate blocks the through hole of the baffle plate.

Description

Technical Field

[0001] The utility model relates to the field of power amplifiers, in particular to a power amplifier with good protection effect. Background Art

[0002] Amplifier generally refers to a power amplifier, which is generally the most basic device in the audio system, commonly known as a "loudspeaker". Its task is to amplify the weak electrical signal from the signal source (from the mixer in professional audio systems) to drive the speaker to produce sound. It can also refer to other devices that perform power amplification.

[0003] The principle of the power amplifier is to use the current control of the transistor or the voltage control of the field effect tube to convert the power of the power supply into a current that changes according to the input signal. Sound, as a wave of different amplitudes and frequencies, that is, AC signal current, is amplified by the transistor to achieve power amplification. In the operation of radio and television integrated media, power amplifiers play a vital role. In the integrated media environment, whether it is the transmission and playback of radio or television signals, power amplifiers are required to provide sufficient power to ensure the quality and stability of the signal.

[0004] The front of an existing power amplifier is generally provided with a display screen and a knob, and the back of the power amplifier is provided with multiple interfaces and multiple rows of heat dissipation holes for internal heat dissipation of the power amplifier. When the power amplifier is used for a long time, the temperature inside the power amplifier will gradually increase. When the temperature of the power amplifier increases, the fan provided inside the power amplifier will discharge the high-temperature gas inside the power amplifier from the heat dissipation holes to speed up the air flow inside the power amplifier and achieve the purpose of cooling. The heat dissipation holes speed up the heat dissipation to a certain extent. However, when the power amplifier is in the shutdown state, dust on the outside is also easy to enter the inside of the power amplifier through the heat dissipation holes. When there is a lot of dust attached to the components inside the power amplifier, the heat dissipation on the surface of the components is affected to a certain extent.

[0005] Therefore, it is necessary to provide a new power amplifier with good protection effect to solve the above technical problems. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a power amplifier with good protection effect.

[0007] The power amplifier with good protection effect provided by the utility model comprises a power amplifier body, a plurality of interfaces are arranged on the back of the power amplifier body, and a plurality of rows of heat dissipation holes are provided on the back of the power amplifier body, a mounting frame is fixedly installed at the edge of the area of ​​the plurality of rows of heat dissipation holes on the back of the power amplifier body, a driving device and a baffle are installed in the mounting frame, a plurality of through holes corresponding to the plurality of rows of heat dissipation holes are provided on the baffle, and movable plates for shielding the through holes are movably connected above the plurality of through holes of the baffle, and the plurality of movable plates can rotate synchronously under the action of the driving device.

[0008] Preferably, a dust screen is fixedly connected to one end of the inner wall of the installation frame adjacent to the heat dissipation hole, a fixing frame is provided on the side of the dust screen away from the heat dissipation hole, and an outer surface of the fixing frame is fixedly connected to the inner wall of the installation frame.

[0009] Preferably, the driving device includes a driving member and multiple pairs of extrusion members installed on a fixed frame, the driving member is installed on the inner wall of the installation frame, and the driving member is movably connected to the baffle, the multiple pairs of extrusion members are respectively arranged corresponding to multiple movable plates, and the two extrusion members in each pair of extrusion members are respectively movably inserted into the sockets opened at both ends of the baffle.

[0010] Preferably, the driving member includes a first side plate and a second side plate, and the first side plate and the second side plate are respectively fixedly connected to two opposite inner walls of the mounting frame, wherein the first side plate is movably connected with a threaded frame, the threaded frame is threadedly connected to the baffle, and the second side plate is fixedly connected with an insertion rod, which is movably inserted into a through hole opened in the baffle.

[0011] Preferably, the extrusion member comprises a support frame and an extrusion roller, one end of the support frame is fixedly connected to the side wall of the fixed frame, and one end of the support frame away from the fixed frame is movably connected to the extrusion roller.

[0012] Preferably, two ends of the movable plate are fixedly connected to two vertical plates, a rotating roller is movably connected between the two vertical plates, and the rotating roller is correspondingly arranged to the squeezing roller.

[0013] Preferably, one end of the movable plate is fixedly connected to a rotating plate, the rotating plate is movably connected to the fixed plate, and the fixed plate is fixedly connected to the baffle.

[0014] Preferably, the edges of the baffle are respectively in contact with the inner walls of the installation frame.

[0015] Compared with the related art, the power amplifier body with good protection effect provided by the utility model has the following features:

[0016] Beneficial effects:

[0017] By providing a driving device, a baffle and a movable plate, when the amplifier body is in use, the driving device is used to rotate the movable plate, and the movable plate is moved away from the through hole of the baffle, thereby exposing the through hole on the baffle to the outside; when the fan inside the amplifier body is operating, the gas can be discharged to the outside of the amplifier body through the heat dissipation holes and the through holes of the baffle; when the amplifier body is in a shutdown state, the driving device can be used to make the movable plate block the through holes of the baffle, thereby making it difficult for dust to enter the heat dissipation holes through the through holes of the baffle; this device can make it difficult for dust on the outside to enter the inside of the amplifier body through the heat dissipation holes, and to a certain extent, it plays a certain protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a power amplifier with good protection effect provided by the utility model;

[0019] Figure 2 for Figure 1 A schematic structural diagram of the structure shown from another angle;

[0020] Figure 3 for Figure 1 The schematic diagram of the exploded structure of the installation frame and the power amplifier body shown;

[0021] Figure 4 for Figure 3 A schematic diagram of a partial decomposed structure of the structure shown;

[0022] Figure 5 for Figure 4 The structural schematic diagram of A shown;

[0023] Figure 6 for Figure 4 A schematic structural diagram of a partial cross-section of the structure shown.

[0024] Numbers in the figure: 1. Amplifier body; 2. Interface; 3. Heat dissipation hole; 4. Baffle; 5. Movable plate; 6. Dust screen; 7. Fixed frame; 8. Support frame; 9. Squeeze roller; 10. Vertical plate; 11. Rotating roller; 12. Socket; 13. First side panel; 14. Second side panel; 15. Threaded rack; 16. Insert rod; 17. Installation frame; 18. Fixed plate; 19. Rotating plate. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0026] Please refer to Figure 1-Figure 6 ,in, Figure 1 A schematic diagram of the structure of a power amplifier with good protection effect provided by the utility model; Figure 2 for Figure 1 A schematic structural diagram of another angle of the structure shown; Figure 3 for Figure 1 The schematic diagram of the exploded structure of the installation frame and the power amplifier body shown; Figure 4 for Figure 3 A schematic diagram of a partial decomposed structure of the structure shown; Figure 5 for Figure 4 The structural schematic diagram of A shown; Figure 6 for Figure 4 A schematic structural diagram of a partial cross-section of the structure shown.

[0027] In the specific implementation process, Figure 1-Figure 6As shown, it includes a power amplifier body 1, a plurality of interfaces 2 are arranged on the back of the power amplifier body 1, and a plurality of rows of heat dissipation holes 3 are opened on the back of the power amplifier body 1, a mounting frame 17 is fixedly installed at the edge of the area of ​​the plurality of rows of heat dissipation holes 3 on the back of the power amplifier body 1, a driving device and a baffle 4 are installed in the mounting frame 17, the edges of the baffle 4 are respectively fitted with the inner wall of the mounting frame 17, a plurality of through holes corresponding to the plurality of rows of heat dissipation holes 3 are opened on the baffle 4, and a movable plate 5 for shielding the through holes is movably connected above the plurality of through holes of the baffle 4, a rotating plate 19 is fixedly connected at one end of the movable plate 5, the rotating plate 19 is movably connected to the fixed plate 18, the fixed plate 18 is fixedly connected to the baffle 4, and a plurality of movable The plate 5 can be synchronously rotated under the action of the driving device. Through the driving device, the baffle 4 and the movable plate 5, when the power amplifier body 1 is in use, the movable plate 5 is rotated by the driving device, and the movable plate 5 is moved away from the through hole of the baffle 4, so that the through hole opened on the baffle 4 is exposed to the outside. When the fan inside the power amplifier body 1 is running, the gas can be discharged to the outside of the power amplifier body 1 through the heat dissipation hole 3 and the through hole of the baffle 4. When the power amplifier body 1 is in a shutdown state, the movable plate 5 can be blocked by the driving device to block the through hole of the baffle 4, so that dust is not easy to enter the heat dissipation hole 3 through the through hole of the baffle 4. This device can prevent the dust on the outside from entering the inside of the power amplifier body 1 through the heat dissipation hole 3.

[0028] A dustproof net 6 is fixedly connected to one end of the inner wall of the installation frame 17 near the heat dissipation hole 3, and a fixing frame 7 is arranged on the side of the dustproof net 6 away from the heat dissipation hole 3. The outer surface of the fixing frame 7 is fixedly connected to the inner wall of the installation frame 17, and the dustproof net 6 is arranged to play a good dustproof role;

[0029] The driving device includes a driving member and a plurality of pairs of extrusion members mounted on the fixed frame 7, the driving member is mounted on the inner wall of the mounting frame 17, and the driving member is movably connected to the baffle 4, and the plurality of pairs of extrusion members are respectively arranged corresponding to the plurality of movable plates 5, and the two extrusion members in each pair of extrusion members are respectively movably inserted into the insertion holes 12 opened at both ends of the baffle 4, and the driving member includes a first side plate 13 and a second side plate 14, and the first side plate 13 and the second side plate 14 are respectively fixedly connected to the two opposite inner walls of the mounting frame 17, wherein the first side plate 13 is movably connected with a threaded frame 15, and the threaded frame 15 is threadedly connected to the baffle 4, and the second side plate 14 is fixedly connected with a plug rod 16, and the plug rod 16 is movably inserted into the through hole opened in the baffle plate 4, and the extrusion member includes a support frame 8 and an extrusion roller 9. One end of the support frame 8 is fixedly connected to the side wall of the fixed frame 7, and the end of the support frame 8 away from the fixed frame 7 is movably connected to the extrusion roller 9. Two vertical plates 10 are fixedly connected to both ends of the movable plate 5. A rotating roller 11 is movably connected between the two vertical plates 10. The rotating roller 11 is correspondingly arranged with the extrusion roller 9. The threaded frame 15 is rotated, and the threaded frame 15 drives the baffle plate 4 to move. When the extrusion roller 9 contacts the rotating roller 11, the baffle plate 4 drives the movable plate 5 to continue to move, so that the extrusion roller 9 pushes the rotating roller 11, and the movable plate 5 rotates under the extrusion of the extrusion roller 9;

[0030] It should be noted that the power amplifier body 1 mentioned above is a portion of an existing power amplifier without multiple interfaces 2 and multiple rows of heat dissipation holes 3 .

[0031] The working principle provided by the utility model is as follows: when the device is used, when the power amplifier body 1 is used, the threaded frame 15 is rotated, and the threaded frame 15 drives the baffle 4 to move. When the squeezing roller 9 contacts the rotating roller 11, as the baffle 4 drives the movable plate 5 to continue to move, the squeezing roller 9 pushes the rotating roller 11, and the movable plate 5 rotates under the squeezing of the squeezing roller 9, thereby exposing the through hole opened on the baffle 4 to the outside. When the fan inside the power amplifier body 1 is operating, the gas can be discharged from the outside of the power amplifier body 1 through the heat dissipation holes 3 and the through holes of the baffle 4. When the power amplifier body 1 is in a shutdown state, the threaded frame 15 can be rotated in the opposite direction, so that the baffle 4 drives the movable plate 5 to move. As the support frame 8 and the squeezing roller 9 are gradually moved out of the jack 12 of the baffle 4, the movable plate 5 rotates under the action of gravity, and the movable plate 5 blocks the through hole of the baffle 4, so that dust is not easy to enter the heat dissipation hole 3 through the through hole of the baffle 4.

[0032] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A power amplifier with good protection effect, characterized in that: The invention comprises a power amplifier body (1), a plurality of interfaces (2) being arranged on the back of the power amplifier body (1), and a plurality of rows of heat dissipation holes (3) being provided on the back of the power amplifier body (1), a mounting frame (17) being fixedly mounted at the edge of the region of the plurality of rows of heat dissipation holes (3) on the back of the power amplifier body (1), a driving device and a baffle (4) being mounted in the mounting frame (17), a plurality of through holes respectively corresponding to the plurality of rows of heat dissipation holes (3) being provided on the baffle (4), and movable plates (5) for shielding the through holes being movably connected above the plurality of through holes of the baffle (4), and the plurality of movable plates (5) being capable of synchronously rotating under the action of the driving device.

2. The power amplifier with good protection effect according to claim 1, characterized in that: A dust screen (6) is fixedly connected to one end of the inner wall of the installation frame (17) adjacent to the heat dissipation hole (3), and a fixing frame (7) is provided on the side of the dust screen (6) away from the heat dissipation hole (3), and the outer surface of the fixing frame (7) is fixedly connected to the inner wall of the installation frame (17).

3. The power amplifier with good protection effect according to claim 2, characterized in that: The driving device comprises a driving member and a plurality of pairs of extrusion members mounted on a fixed frame (7); the driving member is mounted on the inner wall of the mounting frame (17), and the driving member is movably connected to the baffle (4); the plurality of pairs of extrusion members are respectively arranged corresponding to a plurality of movable plates (5); and the two extrusion members in each pair of extrusion members are respectively movably inserted into the insertion holes (12) opened at both ends of the baffle (4).

4. The power amplifier with good protection effect according to claim 3, characterized in that: The driving member comprises a first side plate (13) and a second side plate (14), wherein the first side plate (13) and the second side plate (14) are respectively fixedly connected to two opposite inner walls of the mounting frame (17), wherein a threaded frame (15) is movably connected to the first side plate (13), the threaded frame (15) is threadedly connected to the baffle (4), and an insertion rod (16) is fixedly connected to the second side plate (14), and the insertion rod (16) is movably inserted into a through hole provided in the baffle (4).

5. The power amplifier with good protection effect according to claim 4, characterized in that: The extrusion component comprises a support frame (8) and an extrusion roller (9); one end of the support frame (8) is fixedly connected to the side wall of the fixed frame (7), and one end of the support frame (8) away from the fixed frame (7) is movably connected to the extrusion roller (9).

6. The power amplifier with good protection effect according to claim 5, characterized in that: Two ends of the movable plate (5) are fixedly connected to two vertical plates (10), a rotating roller (11) is movably connected between the two vertical plates (10), and the rotating roller (11) is arranged correspondingly to the squeezing roller (9).

7. The power amplifier with good protection effect according to claim 6, characterized in that: One end of the movable plate (5) is fixedly connected to a rotating plate (19), the rotating plate (19) is movably connected to a fixed plate (18), and the fixed plate (18) is fixedly connected to the baffle (4).

8. The power amplifier with good protection effect according to claim 7, characterized in that: The edges of the baffle (4) are respectively in contact with the inner walls of the installation frame (17).

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