CD player forming acoustic cavity through middle shell

Abstract

The utility model discloses a CD player forming an acoustic cavity through a middle shell, comprising a shell, a PCB and a loudspeaker, the shell comprises a bottom cover, the middle shell and a surface cover, one surface of the middle shell facing the bottom cover is provided with ribs, the acoustic cavity is enclosed by the ribs, and the PCB is arranged below the middle shell and is in butt joint with the ribs to seal the acoustic cavity; the loudspeaker is installed in the acoustic cavity, a loudspeaker hole is formed in the position, corresponding to the loudspeaker, of the PCB, the head of the loudspeaker is embedded into the loudspeaker hole, the loudspeaker is fixed into the acoustic cavity from the lower portion through the PCB, and the PCB is covered with the bottom cover. In this way, the acoustic cavity is self-contained, the structure is more complete, the loudspeaker is installed in the acoustic cavity and is not prone to being affected by vibration or noise of the outside or other components, and the acoustic effect can be improved. And the loudspeaker support is arranged in the acoustic cavity, and the loudspeaker is mounted in the loudspeaker support in an insertion matching manner and is matched and fixed by the PCB, so that screws are not needed for mounting, and the assembly is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic products, in particular to a CD player. Background Art

[0002] CD players are popular among many users because of their portability and good acoustic effects. Traditional CD players generally only cover the speakers with a main shell or a bottom cover to form an acoustic cavity, and the acoustic cavity is not specially designed. For example, a fashionable portable CD player disclosed in the patent document with announcement number CN221378954U has a speaker installed in the front inner cavity of the shell. Another example is a portable CD player disclosed in the patent document with announcement number CN221225845U, in which the speakers are fixedly installed on both sides of the outer wall of the body near the back. The speaker cavity of this type of CD player is basically open, or is composed of a bottom cover and a main shell to form a semi-open structure, which makes it easy to be invaded by external noise and vibration, thereby affecting its acoustic effect. In addition, the speakers of existing CD players of this type generally need to be installed and fixed with screws, which makes the assembly operation more cumbersome. Utility Model Content

[0003] The utility model aims at the defects of the prior art and provides a CD player which has a simpler structure, a more reasonable design and is conducive to improving the acoustic effect and forms an acoustic cavity through a middle shell.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme: a CD player that forms an acoustic cavity through a middle shell, comprising a shell, a PCB board and a speaker, the shell comprising a bottom cover, a middle shell and a surface cover, the surface cover and the bottom cover are respectively assembled and fixed to the upper and lower surfaces of the middle shell, and is characterized in that: ribs are arranged on a side of the middle shell facing the bottom cover, and an acoustic cavity is formed by the ribs, and a PCB board is arranged below the middle shell and connected with the ribs to close the acoustic cavity; the speaker is installed in the acoustic cavity, a speaker hole is arranged on the PCB board at a position corresponding to the speaker, the head of the speaker is embedded in the speaker hole, the speaker is fixed in the acoustic cavity from below by the PCB board, and the bottom cover covers the PCB board.

[0005] Furthermore, a speaker support is provided in the acoustic cavity, and the tail of the speaker is embedded in the speaker support.

[0006] Furthermore, a fixing slot is arranged on the side wall of the speaker support, and a plug-in portion matching the fixing slot is arranged on the side wall of the speaker, and a positioning structure for the speaker is formed by inserting the plug-in portion into the fixing slot.

[0007] Furthermore, the diameter of the speaker hole on the PCB board is smaller than the diameter of the largest part of the speaker, so that the PCB board supports the edge of the speaker, and the PCB board is fastened to the middle shell by screws.

[0008] Furthermore, the ribs and the speaker support are an integrated structure with the middle shell and are made of plastic material by integral injection molding.

[0009] Furthermore, a sound grille covered with fine holes is arranged at the position of the bottom cover aligned with the speaker to cover the speaker, and the sound grille is a concave structure.

[0010] Preferably, there are two speakers, which are respectively installed near two ends of the acoustic cavity, and there is a cavity between the two speakers.

[0011] The utility model arranges ribs in the middle shell, and the ribs cooperate with the PCB board to form an acoustic cavity. The acoustic cavity is self-contained and has a more complete structure. The speaker installed in the acoustic cavity is not easily affected by vibration or noise from the outside or other components, which is conducive to improving the acoustic effect. In addition, by arranging a speaker support in the acoustic cavity, the speaker is installed in the speaker support in a plug-in manner and fixed by the PCB board, without the need for screws, and the assembly operation is more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0014] Figure 3 This is a schematic diagram of the utility model after the bottom cover is removed;

[0015] Figure 4 This is a schematic diagram of the utility model after removing the bottom cover and PCB board;

[0016] Figure 5 This is a schematic diagram of the utility model after removing the bottom cover, PCB board and speaker.

[0017] In the figure, 1 is the bottom cover, 11 is the sound grille, 2 is the middle shell, 21 is the ribs, 22 is the speaker support, 23 is the fixing slot, 3 is the surface cover, 4 is the PCB board, 5 is the speaker, 51 is the plug-in part, and 6 is the acoustic cavity. DETAILED DESCRIPTION

[0018] In this embodiment, refer to Figures 1 - 5, the CD player that forms an acoustic cavity through the middle shell includes a housing, a PCB board 4, and a speaker 5. The housing includes a bottom cover 1, a middle shell 2, and a face cover 3. The face cover 3 and the bottom cover 1 are respectively assembled and fixed to the upper and lower surfaces of the middle shell 2. On one side of the middle shell 2 facing the bottom cover 1, there are ribs 21, and an acoustic cavity 6 is formed by surrounding with the ribs 21. The PCB board 4 is arranged below the middle shell 2 and butted against the ribs 21 to enclose the acoustic cavity 6. The speaker 5 is installed in the acoustic cavity 6. At the position on the PCB board 4 corresponding to the speaker 5, there is a speaker hole. The head of the speaker 5 is embedded in the speaker hole, and the speaker 5 is fixed in the acoustic cavity 6 from below through the PCB board 4, and the bottom cover 1 covers the PCB board 4.

[0019] There is a speaker support 22 arranged in the acoustic cavity 6, and the tail of the speaker 5 is embedded in the speaker support 22.

[0020] On the side wall of the speaker support 22, there is a fixing slot 23, and on the side wall of the speaker 5, there is a plug-in part 51 that matches the fixing slot 23. By inserting the plug-in part 51 into the fixing slot 23, a positioning structure for the speaker 5 is formed, making the assembly of the speaker 5 convenient and fast.

[0021] The diameter of the speaker hole on the PCB board 4 is smaller than the diameter of the largest part of the speaker 5, so that the PCB board 4 supports the edge of the speaker 5. In this way, the speaker 5 can be installed and fixed without using screws, and the PCB board 4 is locked and fixed to the middle shell 2 through screws.

[0022] The ribs 21 and the speaker support 22 are an integral structure with the middle shell 2 and are made by integrally injection molding with plastic materials.

[0023] At the position on the bottom cover 1 aligned with the speaker 5, there is a sound output grille 11 with fine holes to cover the speaker 5. The sound output grille 11 is in an inward concave structure, and the sound is transmitted through the design of the inward concave structure at the bottom, realizing a high-decibel and high-quality sound effect.

[0024] There are two speakers 5, for example, two 8-ohm 2W 25*9MM high-quality speakers. The two speakers 5 are respectively installed at positions near both ends in the acoustic cavity 6, and there is a cavity between the two speakers 5.

[0025] The above has made a detailed description of the present invention. The above is only the preferred embodiment of the present invention, and it cannot limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the scope of this application should still fall within the scope covered by the present invention.

Claims

1. A CD player with an acoustic cavity formed by a middle shell, comprising a shell, a PCB board and a speaker, wherein the shell comprises a bottom cover, a middle shell and a top cover, wherein the top cover and the bottom cover are respectively assembled and fixed to the upper and lower surfaces of the middle shell, and characterized in that: Ribs are provided on one side of the middle shell facing the bottom cover, and an acoustic cavity is formed by the ribs. The PCB board is provided below the middle shell and connected with the ribs to close the acoustic cavity. The speaker is installed in the acoustic cavity, and a speaker hole is provided at a position corresponding to the speaker on the PCB board. The head of the speaker is embedded in the speaker hole. The speaker is fixed in the acoustic cavity from below by the PCB board, and the bottom cover covers the PCB board.

2. The CD player with an acoustic cavity formed by a middle shell according to claim 1, characterized in that: A speaker support is arranged in the acoustic cavity, and the tail of the speaker is embedded in the speaker support.

3. The CD player with an acoustic cavity formed by a middle shell according to claim 2, characterized in that: A fixing slot is arranged on the side wall of the speaker support, and a plug-in part matching the fixing slot is arranged on the side wall of the speaker. The plug-in part is inserted into the fixing slot to form a positioning structure for the speaker.

4. The CD player with an acoustic cavity formed by a middle shell according to claim 1, characterized in that: The diameter of the speaker hole on the PCB board is smaller than the diameter of the largest part of the speaker, so that the PCB board can support the edge of the speaker, and the PCB board is fastened to the middle shell by screws.

5. The CD player with an acoustic cavity formed by a middle shell according to claim 2, characterized in that: The ribs and the speaker support are an integrated structure with the middle shell and are made of plastic material by integral injection molding.

6. The CD player with an acoustic cavity formed by a middle shell according to claim 1, characterized in that: A sound outlet grille covered with fine holes is arranged at the position of the bottom cover aligned with the speaker to cover the speaker, and the sound outlet grille is a concave structure.

7. The CD player with an acoustic cavity formed by a middle shell according to any one of claims 1 to 6, characterized in that: The speakers include two speakers, which are respectively installed at positions close to two ends of the acoustic cavity, and a cavity is formed between the two speakers.

Images