Power amplifier for classroom

Abstract

The utility model discloses a classroom power amplifier which comprises a shell, the bottom of the shell is fixedly connected with a supporting seat, the left end and the right end of the shell are both provided with a plurality of heat dissipation grooves which are evenly distributed, and the bottom of the shell is fixedly connected with two fixing seats which are symmetrically distributed. And a connecting plate is slidably connected into the fixing base, the connecting plate is slidably connected with the shell, a dustproof net is arranged in the connecting plate, a protection mechanism is arranged on the heat dissipation groove, and a connecting mechanism is arranged on the connecting plate. According to the utility model, the insertion block is inserted into the heat dissipation groove, so that the heat dissipation groove can be sealed and shielded, the heat dissipation groove can be protected when the power amplifier does not work, external dust can be prevented from entering the power amplifier, and the insertion block and the heat dissipation groove can be separated through the effect of the rotatable hinge seat and the rotatable hinge seat can be opened in a rotatable manner, thereby facilitating heat dissipation.

Description

Technical Field

[0001] The utility model relates to the technical field of power amplifiers, in particular to a power amplifier for classrooms. Background Art

[0002] A classroom amplifier is a device used to amplify audio signals, commonly used in classrooms, conference rooms and other places. It can be connected to an audio source device (such as a microphone, CD player, computer, etc.), amplify the audio signal and output it to the speaker to increase the volume and clarity of the sound.

[0003] The utility model patent with the patent authorization announcement number CN217935855U discloses a power amplifier, including a power amplifier body, the lower surface of the power amplifier body is fixedly connected with a support leg, the lower surface of the power amplifier body is provided with a connecting ring, and a dustproof mechanism, and the dustproof mechanism is provided on the lower surface of the power amplifier body. The beneficial effect of the utility model is that the power amplifier, by providing a dustproof net, when it is necessary to prevent dust from entering the interior of the power amplifier body, firstly, a threaded hole is opened at the bottom of the power amplifier body, and a threaded rod passes through the fixing ring and fixes the fixing ring to the bottom of the power amplifier body, so that the dustproof net covers the bottom of the arc groove, thereby preventing dust from entering the interior of the power amplifier body from the arc groove. The device is convenient for preventing dust from entering the interior of the power amplifier body.

[0004] In the above-mentioned prior art, during the use of the power amplifier, since the heat sink is in an open state, it is not convenient to protect the heat sink when the power amplifier is stopped, and external dust can easily enter the inside of the power amplifier through the heat sink. In addition, the dustproof net at the bottom of the power amplifier is connected and fixed with multiple sets of bolts. After the dustproof net is covered with dust, it is troublesome to disassemble it, which makes it inconvenient to clean the dustproof net. Utility Model Content

[0005] The utility model aims to provide a classroom power amplifier, which solves the problem that it is inconvenient to protect the heat dissipation slot and the problem that the dustproof net is inconvenient to disassemble.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a power amplifier for classroom use, comprising a shell, a support seat is fixedly connected to the bottom of the shell, a plurality of evenly distributed heat dissipation grooves are provided at both ends of the left and right sides of the shell, two symmetrically distributed fixed seats are fixedly connected to the bottom of the shell, a connecting plate is slidably connected to the inside of the fixed seat, the connecting plate is slidably connected to the shell, a dust net is arranged inside the connecting plate, a protective mechanism is arranged on the heat dissipation groove, and a connecting mechanism is arranged on the connecting plate.

[0007] Preferably, the number of the support bases is four, and the four support bases are evenly distributed at the bottom of the housing. By designing the support bases, the power amplifier can be supported.

[0008] Preferably, the protection mechanism includes an insert block, each heat dissipation slot is slidably sleeved with an insert block, the outer side of the insert block is fixedly connected with a hinge seat, the hinge seat is hinged with the housing, the hinge seat is hinged with a hinge rod, the hinge rod is in contact with the housing, a first spring is provided inside the hinge rod, a guide block is slidably sleeved inside the hinge rod, the end of the guide block away from the first spring is fixedly connected with a guide rod, the guide rod is slidably connected with the hinge rod, the outer side of the guide rod is fixedly connected with a support block, the support block is in contact with the hinge seat. By designing a protection mechanism, the heat dissipation slot can be protected.

[0009] Preferably, one end of the first spring is fixedly connected to the guide block, and the other end of the first spring is fixedly connected to the hinge rod. By designing the first spring, the force of the first spring can act on the guide block.

[0010] Preferably, the connection mechanism includes a dovetail block, the fixed seat is slidably connected to the dovetail block, the top of the dovetail block is fixedly connected to a connection plate, the fixed seat is slidably sleeved with a slide bar, the outside of the slide bar is provided with a second spring, the outside of the slide bar is fixedly connected to a connection block, the connection block is slidably connected to the fixed seat, the connection block is movably sleeved with a ball, the ball is movably connected to the fixed seat, and the ball is slidably connected to the connection plate. By designing the connection mechanism, it is convenient to disassemble the connection plate.

[0011] Preferably, one end of the second spring is fixedly connected to the fixing seat, and the other end of the second spring is fixedly connected to the connecting block. By designing the second spring, the force of the second spring can act on the connecting block.

[0012] Preferably, a groove is provided inside the connecting plate, and a ball is slidably connected inside the groove. The groove is designed so that the ball can slide in the groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model can seal and shield the heat sink by designing the connection between the plug block and the heat sink, and can protect the heat sink when the power amplifier is not working to prevent the entry of external dust. Through the function of the rotatable hinge seat, the hinge seat can be rotated to open so that the plug block is separated from the heat sink, which is convenient for heat dissipation.

[0015] 2. The utility model can prevent dust from entering the power amplifier by designing a dustproof net. The vertical direction of the connecting plate can be limited by plugging the dovetail block with the fixing seat. The horizontal direction of the connecting plate can be limited by plugging the ball with the groove. The connecting plate and the ball can be separated by pushing the connecting plate with force, which facilitates the removal of the dustproof net and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The overall structure of the utility model is three-dimensional Figure 1 ;

[0017] Figure 2 The overall structure of the utility model is three-dimensional Figure 2 ;

[0018] Figure 3 For this utility model Figure 1 A front sectional view of a local structure of an articulated seat;

[0019] Figure 4 For this utility model Figure 2 Front view of the cross-sectional view of the local structure of the connecting plate.

[0020] In the figure: 1. shell; 2. support seat; 3. heat dissipation groove; 4. fixing seat; 5. connecting plate; 6. dust screen; 7. protection mechanism; 8. connecting mechanism; 81. plug block; 82. hinge seat; 83. hinge rod; 84. first spring; 85. guide block; 86. guide rod; 87. support block; 91. dovetail block; 92. slide rod; 93. second spring; 94. connecting block; 95. ball; 96. groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1 , Figure 2A power amplifier for classroom use comprises a shell 1, a support base 2 is fixedly connected to the bottom of the shell 1, the number of the support bases 2 is four, and the four support bases 2 are evenly distributed at the bottom of the shell 1. By designing the support bases 2, the power amplifier can be supported, a plurality of evenly distributed heat dissipation grooves 3 are provided at both ends of the left and right sides of the shell 1, two symmetrically distributed fixing bases 4 are fixedly connected to the bottom of the shell 1, a connecting plate 5 is slidably connected inside the fixing base 4, the connecting plate 5 is slidably connected to the shell 1, a dustproof net 6 is arranged inside the connecting plate 5, a protective mechanism 8 is arranged on the heat dissipation groove 3, and a connecting mechanism 9 is arranged on the connecting plate 5.

[0023] See also Figure 1 , Figure 3 The protective mechanism 8 includes an insert block 81, and each heat dissipation slot 3 is slidably sleeved with an insert block 81 inside. The outer side of the insert block 81 is fixedly connected with a hinge seat 82, which is hinged to the shell 1. The interior of the hinge seat 82 is hinged with a hinge rod 83, which contacts the shell 1. A first spring 84 is arranged inside the hinge rod 83, and one end of the first spring 84 is fixedly connected to a guide block 85, and the other end of the first spring 84 is fixedly connected to the hinge rod 83. By designing the first spring 84, the force of the first spring 84 can act on the guide block 85. The interior of the hinge rod 83 is slidably sleeved with a guide block 85, and one end of the guide block 85 away from the first spring 84 is fixedly connected with a guide rod 86, which is slidably connected to the hinge rod 83, and the outer side of the guide rod 86 is fixedly connected with a support block 87, which contacts the hinge seat 82. By designing the protective mechanism 8, the heat dissipation slot 3 can be protected.

[0024] See also Figure 1 , Figure 2 , Figure 4 The connecting mechanism 9 includes a dovetail block 91, a dovetail block 91 is slidably connected to the interior of the fixed seat 4, and a connecting plate 5 is fixedly connected to the top of the dovetail block 91. A sliding rod 92 is slidably sleeved inside the fixed seat 4. A second spring 93 is arranged on the outer side of the sliding rod 92. One end of the second spring 93 is fixedly connected to the fixed seat 4, and the other end of the second spring 93 is fixedly connected to the connecting block 94. By designing the second spring 93, the force of the second spring 93 can act on the connecting block 94. The outer side of the sliding rod 92 is fixedly connected to the connecting block 94. The connecting block 94 is slidably connected to the fixed seat 4. The internal movably sleeved of the connecting block 94 is connected to the fixed seat 4. The ball 95 is movably connected to the fixed seat 4. The ball 95 is slidably connected to the connecting plate 5. A groove 96 is provided inside the connecting plate 5. The ball 95 is slidably connected inside the groove 96. By designing the groove 96, the ball 95 can slide in the groove 96. By designing the connecting mechanism 9, it is convenient to disassemble the connecting plate 5.

[0025] The specific implementation process of the utility model is as follows: when in use, the heat sink 3 can be closed and shielded by plugging the plug block 81 into the heat sink 3, and the heat sink 3 can be protected when the power amplifier is not working to prevent the entry of external dust. When the heat sink 3 needs to be opened, the hinge seat 82 is rotated, and the hinge seat 82 drives the plug block 81 to move, so that the plug block 81 is separated from the heat sink 3, and then the hinge rod 83 is rotated and pulled out from the inside of the hinge seat 82, so that the support block 87 contacts the outer wall of the housing 1, and the support block 87 can be supported under the elastic action of the first spring 84, so as to facilitate heat dissipation.

[0026] When the connecting plate 5 needs to be disassembled, the connecting plate 5 is directly pushed, and the connecting plate 5 drives the dovetail block 91 to slide along the fixing seat 4. At the same time, the connecting plate 5 and the ball 95 slide relative to each other, and the groove 96 in the connecting plate 5 squeezes and pushes the ball 95 to move horizontally, and the ball 95 drives the connecting block 94 to move horizontally, and the connecting block 94 drives the slide bar 92 to move, and the connecting block 94 squeezes the second spring 93, so that the ball 95 can be separated from the groove 96, and the connecting plate 5 can be removed from the fixing seat 4, which is convenient for the disassembly of the dustproof net 6 and is more convenient to use.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A classroom power amplifier, comprising a housing (1), characterized in that: The bottom of the shell (1) is fixedly connected to a support seat (2), the left and right ends of the shell (1) are each provided with a plurality of evenly distributed heat dissipation slots (3), the bottom of the shell (1) is fixedly connected to two symmetrically distributed fixed seats (4), the interior of the fixed seats (4) is slidably connected to a connecting plate (5), the connecting plate (5) is slidably connected to the shell (1), a dustproof net (6) is arranged inside the connecting plate (5), a protective mechanism (8) is arranged on the heat dissipation slot (3), and a connecting mechanism (9) is arranged on the connecting plate (5).

2. A classroom power amplifier according to claim 1, characterized in that: The number of the support seats (2) is four, and the four support seats (2) are evenly distributed at the bottom of the housing (1).

3. The classroom power amplifier according to claim 1, characterized in that: The protection mechanism (8) comprises an insert block (81), each heat dissipation slot (3) is slidably sleeved with an insert block (81), the outer side of the insert block (81) is fixedly connected with a hinge seat (82), the hinge seat (82) is hinged with the housing (1), the interior of the hinge seat (82) is hinged with a hinge rod (83), the hinge rod (83) is in contact with the housing (1), a first spring (84) is arranged inside the hinge rod (83), the interior of the hinge rod (83) is slidably sleeved with a guide block (85), one end of the guide block (85) away from the first spring (84) is fixedly connected with a guide rod (86), the guide rod (86) is slidably connected with the hinge rod (83), the outer side of the guide rod (86) is fixedly connected with a support block (87), the support block (87) is in contact with the hinge seat (82).

4. A classroom power amplifier according to claim 3, characterized in that: One end of the first spring (84) is fixedly connected to the guide block (85), and the other end of the first spring (84) is fixedly connected to the hinge rod (83).

5. The classroom power amplifier according to claim 1, characterized in that: The connecting mechanism (9) comprises a dovetail block (91), the fixed seat (4) is slidably connected to the dovetail block (91), the top of the dovetail block (91) is fixedly connected to a connecting plate (5), the fixed seat (4) is slidably sleeved with a slide rod (92), the outer side of the slide rod (92) is provided with a second spring (93), the outer side of the slide rod (92) is fixedly connected to a connecting block (94), the connecting block (94) is slidably connected to the fixed seat (4), the connecting block (94) is movably sleeved with a ball (95), the ball (95) is movably connected to the fixed seat (4), and the ball (95) is slidably connected to the connecting plate (5).

6. The classroom power amplifier according to claim 5, characterized in that: One end of the second spring (93) is fixedly connected to the fixing seat (4), and the other end of the second spring (93) is fixedly connected to the connecting block (94).

7. The classroom power amplifier according to claim 1, characterized in that: A groove (96) is provided inside the connecting plate (5), and a ball (95) is slidably connected inside the groove (96).

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