FPC board for loudspeaker and loudspeaker

Abstract

The utility model discloses an FPC (Flexible Printed Circuit) board for a loudspeaker and the loudspeaker. Wherein the first connecting sheet is used for being connected with a basin stand, the second connecting sheet is used for being connected with a voice coil, and the first connecting sheet and the second connecting sheet are fixedly connected through two elastic sheets; a connecting bridge is also fixedly arranged between the two elastic sheets; the two ends of the second connecting piece extend towards the first connecting piece to be provided with arc-shaped connecting parts. The elastic piece is U-shaped, one end of the elastic piece is fixedly connected to the arc-shaped connecting part, and the other end of the elastic piece is fixedly connected to the first connecting piece; the connecting bridge is connected to the corner of the two elastic sheets; according to the scheme, the connecting bridge is fixedly arranged between the two elastic pieces, displacement of the free end of the joint between the two elastic pieces is limited, and therefore vibration of the FPC board is restrained; the noise can be effectively reduced by reducing the vibration of the FPC board, so that the sound quality of the loudspeaker is purer and clearer; moreover, by reducing the vibration of the FPC board, the mechanical stress can be reduced, so that the service life of the FPC board is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of loudspeakers, in particular to an FPC board used for loudspeakers and a loudspeaker. Background Art

[0002] A speaker is an electroacoustic transducer that converts electrical signals into acoustic signals and radiates them into the air. The FPC board (flexible printed circuit board) in the speaker is a key component used to connect different parts of the speaker to ensure accurate transmission of audio signals; the FPC board is usually used to connect the voice coil, diaphragm and other key components. Through the FPC board, audio signals can be transmitted from the motherboard or other signal sources to the speaker, thereby driving the speaker to make sound.

[0003] However, FPC boards are more likely to vibrate when subjected to external forces. Compared with rigid circuit boards, FPC boards are more sensitive to vibration. The speaker drives the diaphragm to vibrate through audio signals, thereby generating sound waves. As a key component connecting the diaphragm and other electronic components, the FPC board will also vibrate under the action of the audio signal due to the corresponding force. Large vibrations of the FPC board may cause distortion of the sound output by the speaker. When the FPC board vibrates under the action of the audio signal, this vibration may interfere with the normal operation of the speaker, causing the waveform of the sound to change, resulting in a decrease in sound quality. Continuous vibration will accelerate the mechanical fatigue of the FPC board, which may cause the circuit on the FPC board to break or the material to be damaged. This damage will not only affect the transmission of the audio signal, but may also cause the speaker to fail completely. Utility Model Content

[0004] In view of the problems existing in the above-mentioned prior art, the utility model provides an FPC board for a speaker and a speaker, which can effectively solve the problems existing in the above-mentioned prior art.

[0005] The technical solution of the utility model is:

[0006] According to one aspect of the utility model, it includes: a first connecting piece for connecting the basin frame and a second connecting piece for connecting the voice coil, the first connecting piece and the second connecting piece are fixedly connected by two elastic pieces; and a connecting bridge is fixedly arranged between the two elastic pieces.

[0007] Furthermore, both ends of the second connecting piece are provided with arc-shaped connecting parts extending toward the first connecting piece; the spring piece is U-shaped, one end of the spring piece is fixedly connected to the arc-shaped connecting part, and the other end is connected to the first connecting piece; the connecting bridge is connected at the corners of the two spring pieces.

[0008] Furthermore, a plurality of supporting portions are extended from one side of the second connecting sheet away from the first connecting sheet, and the plurality of supporting portions are used to abut against the voice coil.

[0009] Furthermore, the second connecting piece is provided with at least one notch.

[0010] Furthermore, the notch is arranged at the connection between the supporting portion and the second connecting piece.

[0011] Furthermore, the second connecting piece is extended toward the first connecting piece to form a plurality of pads.

[0012] Furthermore, the second connecting piece, the spring piece, the connecting bridge and the first connecting piece are integrally formed.

[0013] According to another aspect of the utility model, a speaker includes a basin frame and a voice coil, wherein an elastic support component is connected between the basin frame and the voice coil, and the elastic support component is composed of a plurality of FPC boards with structures as described in any one of the above.

[0014] Furthermore, the number of the FPC boards is two, and the two FPC boards are symmetrically arranged between the basin frame and the voice coil; and one of the FPC boards is provided with a notch.

[0015] By adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0016] This solution restricts the displacement of the free ends of the connection between the two spring sheets by fixing a connecting bridge between the two spring sheets, thereby suppressing the vibration of the FPC board; reducing the vibration of the FPC board can effectively reduce noise, making the sound quality of the speaker purer and clearer; and by reducing the vibration of the FPC board, this mechanical stress can be reduced, thereby extending the service life of the FPC board; reducing the vibration of the FPC board helps to enhance the stability of the speaker during operation, especially in the case of high volume or low-frequency vibration; stable performance is essential for the normal operation of the speaker in various environments and conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The three-dimensional structure of the speaker in the present invention is shown in FIG. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the exploded structure of the speaker in the utility model;

[0020] Figure 3 This is a schematic diagram of the planar structure of the elastic support assembly in the utility model;

[0021] Figure 4 The three-dimensional structure of the speaker in the present invention is shown in FIG. Figure 2 ;

[0022] In the figure: elastic PFB plate-1, first connecting piece-11, spring piece-12, second connecting piece-13, arc-shaped connecting part-131, supporting part-132, pad-133, notch-134, connecting bridge-14, basin frame-2, voice coil-3, ball top-4. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is particularly noted that the following embodiments are only used to illustrate the present invention, but do not limit the scope of the present invention. Similarly, the following embodiments are only partial embodiments of the present invention rather than all embodiments. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figures 1 to 4 As shown, the present solution provides an FPC board for a speaker and a speaker.

[0025] See also Figure 1 and Figure 2 A speaker includes a basin frame 2, a voice coil 3 and a dome 4, wherein an elastic support component is connected between the basin frame 2 and the voice coil 3. The elastic support component is an elastic PFB board 1. The elastic PFB board 1 includes two symmetrically arranged FPC boards, and the two FPC boards are symmetrically arranged between the basin frame 2 and the voice coil 3; one of the FPC boards is provided with a notch 134.

[0026] See also Figures 1 to 4 The FPC board includes a first connecting plate 11 for connecting the basin frame 2 and a second connecting plate 13 for connecting the voice coil 3. The first connecting plate 11 and the second connecting plate 13 are fixedly connected by two spring plates 12; a connecting bridge 14 is also fixedly provided between the two spring plates 12.

[0027] Specifically, both ends of the second connecting piece 13 are extended toward the first connecting piece 11 to form an arc-shaped connecting portion 131; the spring piece 12 is U-shaped, one end of the spring piece 12 is fixedly connected to the arc-shaped connecting portion 131, and the other end is fixedly connected to the first connecting piece 11; the connecting bridge 14 is connected to the corners of the two spring pieces 12.

[0028] See also Figure 4In this embodiment, a plurality of supporting portions 132 are extended from one side of the second connecting sheet 13 away from the first connecting sheet 11, and the plurality of supporting portions 132 are used to abut against the voice coil 3. Specifically, the supporting portions 132 are respectively disposed at both ends of the second connecting sheet 13; the supporting portions 132 are glued to the voice coil 3.

[0029] See also Figure 3 In this embodiment, the second connecting piece 13 is provided with at least one notch 134. Specifically, the notch 134 is provided at the connection between the supporting portion 132 and the second connecting piece 13. The notch 134 is used to avoid the wire extending from the voice coil 3.

[0030] See also Figure 3 In this embodiment, the second connecting piece 13 is extended toward the first connecting piece 11 and is provided with a plurality of pads 133 .

[0031] In this embodiment, the second connecting piece 13 , the spring piece 12 , the connecting bridge 14 and the first connecting piece 11 are integrally formed.

[0032] Working principle: When the spring piece 12 vibrates, the arc-shaped connecting parts 131 at both ends of the spring piece 12 vibrate in opposite directions (one end facing up and the other end facing down). If there is no connecting bridge 14, the connection between the two spring pieces 12 will be displaced in opposite directions; on the contrary, if a connecting bridge 14 is fixed between the two spring pieces 12, the displacement of the free ends of the connection between the two spring pieces 12 will be limited, thereby suppressing vibration.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An FPC board for a loudspeaker, comprising a first connecting piece (11) for connecting a basin frame (2) and a second connecting piece (13) for connecting a voice coil (3), characterized in that: The first connecting piece (11) and the second connecting piece (13) are fixedly connected via two spring sheets (12); a connecting bridge (14) is also fixedly arranged between the two spring sheets (12).

2. An FPC board for a speaker as claimed in claim 1, characterized in that: Both ends of the second connecting piece (13) are provided with arc-shaped connecting portions (131) extending toward the first connecting piece (11); the spring piece (12) is U-shaped, one end of the spring piece (12) is fixedly connected to the arc-shaped connecting portion (131), and the other end is connected to the first connecting piece (11); the connecting bridge (14) is connected to the corners of the two spring pieces (12).

3. The FPC board for a speaker as claimed in claim 1, characterized in that: A plurality of support portions (132) are provided on a side of the second connecting piece (13) away from the first connecting piece (11), and the plurality of support portions (132) are used to abut against the voice coil (3).

4. The FPC board for a speaker as claimed in claim 3, characterized in that: The second connecting piece (13) is provided with at least one notch (134).

5. The FPC board for a speaker as claimed in claim 4, characterized in that: The notch (134) is arranged at the connection between the support portion (132) and the second connecting piece (13).

6. The FPC board for a speaker as claimed in claim 1, characterized in that: The second connecting piece (13) is extended towards the first connecting piece (11) and is provided with a plurality of welding pads (133).

7. An FPC board for a speaker as described in any one of claims 1 to 6, characterized in that: The second connecting piece (13), the spring piece (12), the connecting bridge (14) and the first connecting piece (11) are integrally formed.

8. A loudspeaker, comprising a basin frame (2) and a voice coil (3), wherein an elastic support component is connected between the basin frame (2) and the voice coil (3), characterized in that: The elastic support assembly is composed of a plurality of FPC boards as described in any one of claims 1-7.

9. A loudspeaker as claimed in claim 8, characterized in that: There are two FPC boards, and the two FPC boards are symmetrically arranged between the basin frame (2) and the voice coil (3); one of the FPC boards is provided with a notch (134).

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