Miniature loudspeaker adopting composite cone paper

Abstract

The utility model discloses a small-sized loudspeaker adopting composite cone paper. The small-sized loudspeaker comprises a basin stand which has a square outline and is provided with a sinking cavity in the middle, a voice coil is assembled in the sinking cavity, and a gasket is assembled on the top of the voice coil; assembling composite drum paper on the surface of the basin stand; the composite drum paper comprises a vibrating diaphragm and a skirt edge, wherein the vibrating diaphragm is made of a core material and fabrics attached to the two sides of the core material; the rigidity of the fabric is larger than that of the core material, and the density of the fabric is smaller than that of the core material. Therefore, rigid fabrics are adhered to the two sides of the low-density core material to prepare the diaphragm with high bandwidth and high sensitivity, and measures such as flexible assembly of the skirt edge and forming of the wave-transparent hole in the basin frame are matched, so that the negative influence of a segmentation vibration phenomenon on the diaphragm is greatly reduced, the tone quality is excellent, the diaphragm is simple and convenient to process, and the cost is effectively controlled.

Description

Technical Field

[0001] The invention relates to the technical field of loudspeaker structures, and in particular to a small loudspeaker using composite drum paper. Background Art

[0002] Due to the lack of sufficient space for the vibration chamber, the external sound quality of small speaker products is lower than that of traditional large-volume speakers. In addition, due to the compact structural design, in addition to the vibration of the diaphragm, structural parts such as the basin frame and voice coil will also vibrate during operation, causing split vibration, which divides the diaphragm into several areas, each of which vibrates independently, affecting the external sound quality. In order to minimize the impact of the split vibration phenomenon on the sound quality, traditional speakers often change the smooth inner surface of the diaphragm by setting reinforcing ribs and performing non-uniform painting, thereby reducing the occurrence of split vibration. The diaphragm size of small speakers is relatively small, and non-uniform processing is difficult and costly in terms of technology; and structural changes such as setting reinforcing ribs will have a greater impact on the small area of ​​the diaphragm of small speakers, causing the sound quality to deteriorate further. Summary of the invention

[0003] The invention discloses a small loudspeaker using composite drum paper, which specifically includes the following contents.

[0004] A basin frame 1 with a square outline and a centrally located sinking cavity 11;

[0005] The voice coil 2 is installed in the sinking cavity 11, and the gasket 3 is installed on the top of the voice coil 2;

[0006] The composite drum paper 4 is mounted on the surface of the basin frame 1;

[0007] The composite drum paper 4 includes a diaphragm 5 and a skirt 6, wherein the diaphragm 5 is made of a core material 52 and a fabric 51 attached to both sides of the core material 52;

[0008] The rigidity of the outer material 51 is greater than that of the core material 52 , and the density of the outer material 51 is less than that of the core material 52 .

[0009] Preferably, the fabric 51 is a long, thin plate made of carbon fiber material that is cut and shaped, and both ends of the diaphragm 5 are cut into arc edges.

[0010] Preferably, the core material 52 is made of polymethacrylimide foam plastic, and its specifications and contours are the same as those of the fabric 51 , and two sides thereof are tightly fitted to the fabric 51 by adhesive.

[0011] Preferably, the cross section of the skirt 6 is U-shaped, and an inner veneer 61 extending inwards is provided on the inner side of the skirt 6 , and an outer veneer 62 extending outwards is provided on the outer side of the skirt 6 .

[0012] Preferably, the skirt 6 is made of a flexible material.

[0013] Preferably, the inner facing surface 61 of the skirt 6 is bonded to the inner edge of the diaphragm 5;

[0014] The outer facing surface 62 of the skirt 6 is adhesively fitted into the groove on the surface of the chassis 1.

[0015] Preferably, the bottom of the chassis 1 is provided with an assembly hole 12 for fitting the voice coil 2.

[0016] Preferably, the edge of the enclosure of the voice coil 2 is fitted and installed at the step of the assembly hole 12.

[0017] Preferably, the bottom surface edge of the chassis 1 is provided with a wave - transmitting hole 13;

[0018] The main body edge of the chassis 1 is provided with a mounting hole 14.

[0019] Preferably, a terminal 15 electrically connected to the voice coil 2 is provided in the middle of the bottom surface of the chassis 1 for transmitting an electrical signal corresponding to the audio to the voice coil 2.

[0020] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0021] By bonding a rigid fabric on both sides of a low - density core material, a diaphragm with high frequency bandwidth and high sensitivity is produced. Combining measures such as flexible assembly of the skirt and opening wave - transmitting holes in the chassis, the negative impact of the splitting vibration phenomenon on the diaphragm is greatly reduced, the sound quality is excellent, and the diaphragm processing is simple, and the cost is effectively controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a three - dimensional structure schematic diagram of a small - sized loudspeaker using a composite drum paper disclosed in the embodiments of the present invention;

[0024] Figure 2 It is another three - dimensional structure schematic diagram of a small - sized loudspeaker using a composite drum paper disclosed in the embodiments of the present invention;

[0025] Figure 3 It is a side - view structure schematic diagram of a small - sized loudspeaker using a composite drum paper disclosed in the embodiments of the present invention;

[0026] Figure 4It is a schematic cross-sectional structure diagram of a small speaker using a composite drum paper disclosed in an embodiment of the present invention;

[0027] Figure 5 It is a schematic partial structure diagram of the middle diaphragm of a small speaker using a composite drum paper disclosed in an embodiment of the present invention.

[0028] The main structure symbols are explained as follows in the table:

[0029] Bracket 1 Sunken cavity 11 Voice coil 2 Assembly hole 12 Gasket 3 Wave-transmitting hole 13 Composite drum paper 4 Mounting hole 14 Terminal 15 Diaphragm 5 Fabric 51 Core material 52 Skirt 6 Inner facing 61 Outer facing 62 Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1 to 5 , the small speaker using a composite drum paper may include the following.

[0032] A chassis 1 with a square contour and a centrally sunken cavity 11;

[0033] A voice coil 2 is assembled in the sunken cavity 11, and a gasket 3 is assembled on the top of the voice coil 2;

[0034] A composite drum paper 4 is assembled on the surface of the chassis 1;

[0035] The composite drum paper 4 includes a diaphragm 5 and a skirt 6. The diaphragm 5 is made of a core material 52 and a fabric 51 attached to both sides of the core material 52;

[0036] Among them, the rigidity of the fabric 51 is greater than that of the core material 52, and the density of the fabric 51 is less than that of the core material 52.

[0037] Specifically, the rigid fabric ensures that the diaphragm has good bandwidth performance, and the low-density core material provides excellent sensitivity, ensuring that the small speaker can still obtain excellent sound quality even in the absence of a large diaphragm and sufficient space for the resonance cavity.

[0038] In this embodiment, the fabric 51 is a cut-to-size long strip thin plate made of carbon fiber material, and both ends of the diaphragm 5 are cut into arc edges.

[0039] In this embodiment, the material of the core material 52 is polymethacrylimide foam plastic, and its specification contour is the same as that of the fabric 51, and both sides are closely attached to the fabric 51 through an adhesive.

[0040] Here, the carbon fiber material has strong rigidity, is not easy to deform, and has fast vibration reset, which can provide good bandwidth performance. The core material of polymethacrylimide foam plastic has low density, light weight, and can respond sensitively to sound waves of all frequencies.

[0041] The combination of the two can produce a composite drum paper, which can effectively avoid the problems of limited bandwidth and incomplete sound range response existing in drum papers made of single materials.

[0042] In addition, carbon fiber is a dense tow-like material, and its structural characteristics mean that it does not require additional uneven processing, and the low-density core material of the interlayer also has an uneven effect in the diaphragm, effectively reducing the impact of the split vibration phenomenon on the composite drum paper.

[0043] In this embodiment, the cross section of the skirt 6 is U-shaped, and an inner veneer 61 extending inwards is provided on the inner side of the skirt 6 , and an outer veneer 62 extending outwards is provided on the outer side of the skirt 6 .

[0044] In this embodiment, the skirt 6 is made of flexible material.

[0045] In this embodiment, the inner surface 61 of the skirt 6 is bonded to the inner edge of the diaphragm 5;

[0046] The outer surface 62 of the skirt 6 is adapted to be bonded in the groove on the surface of the basin frame 1 .

[0047] Here, the skirt presents a U-shaped cross-section, with the diaphragm and the basin frame bonded to the inner and outer sides of the U-shaped cross-section respectively, to achieve a flexible connection between the two, thereby further reducing the negative impact of the split vibration phenomenon on the composite drum paper and ensuring stable sound quality.

[0048] In this embodiment, a mounting hole 12 is provided at the bottom of the basin frame 1 for fitting and mounting the voice coil 2 .

[0049] In this embodiment, the edge of the shell of the voice coil 2 is adapted to be installed at the step of the assembly hole 12 .

[0050] Here, the voice coil is limitedly assembled in the basin frame assembly hole, and the rear end of the voice coil is exposed outside the basin frame, so that the unplanned vibration generated does not affect the gasket and diaphragm at the front end.

[0051] In this embodiment, a wave-transmitting hole 13 is provided at the bottom edge of the basin frame 1;

[0052] A mounting hole 14 is provided on the edge of the main body of the basin frame 1 .

[0053] Here, the cavity formed between the basin frame, voice coil and diaphragm is eliminated, and a wave-transmitting hole is opened to destroy the reflective wall of the cavity, ensuring that the external sound quality is stable and clear.

[0054] In this embodiment, a terminal 15 electrically connected to the voice coil 2 is provided in the middle of the bottom surface of the basin frame 1 for transmitting an electrical signal corresponding to the audio to the voice coil 2.

[0055] Compared with the prior art, the embodiment of the present invention has the following beneficial effects:

[0056] A rigid fabric is adhered to both sides of a low-density core material to produce a diaphragm with a high frequency bandwidth and high sensitivity. By cooperating with measures such as flexible assembly of the skirt and opening wave-transmitting holes in the basin frame, the negative impact of the splitting vibration phenomenon on the diaphragm is greatly reduced, the sound quality is excellent, and the diaphragm is easy to process and the cost is effectively controlled.

Claims

1. A small speaker using composite drum paper, characterized in that: include: A basin stand (1) with a square outline and a centrally located sinking cavity (11); A voice coil (2) is mounted on the sinking cavity (11), and a gasket (3) is mounted on the top of the voice coil (2); The composite drum paper (4) is mounted on the surface of the basin frame (1); The composite drum paper (4) comprises a diaphragm (5) and a skirt (6), wherein the diaphragm (5) is made of a core material (52) and a fabric (51) attached to both sides of the core material (52); The rigidity of the fabric (51) is greater than that of the core material (52), and the density of the fabric (51) is less than that of the core material (52).

2. A small speaker using composite drum paper according to claim 1, characterized in that: include: The fabric (51) is a long, thin plate made of carbon fiber material that is cut and shaped, and both ends of the diaphragm (5) are cut into arc edges.

3. A small speaker using composite drum paper according to claim 2, characterized in that: include: The core material (52) is made of polymethacrylimide foam plastic, and its specifications and profile are the same as those of the fabric (51), and two sides are tightly fitted to the fabric (51) by adhesive.

4. A small speaker using composite drum paper according to claim 1, characterized in that: include: The cross section of the skirt (6) is U-shaped, and an inner veneer (61) extending inwards is arranged on the inner side of the skirt (6), and an outer veneer (62) extending outwards is arranged on the outer side of the skirt (6).

5. A small speaker using composite drum paper according to claim 4, characterized in that: include: The skirt (6) is made of flexible material.

6. A small speaker using composite drum paper according to claim 4, characterized in that: include: The inner surface (61) of the skirt (6) is bonded to the inner edge of the diaphragm (5); The outer surface (62) of the skirt (6) is adapted to be bonded in a groove on the surface of the basin frame (1).

7. The small speaker using composite drum paper according to claim 1, characterized in that: include: The bottom of the basin frame (1) is provided with an assembly hole (12) for fitting and installing the voice coil (2).

8. The small speaker using composite drum paper according to claim 7, characterized in that: include: The edge of the shell of the voice coil (2) is adapted to be installed at the step of the assembly hole (12).

9. The small speaker using composite drum paper according to claim 1, characterized in that: include: The bottom edge of the basin frame (1) is provided with a wave-transmitting hole (13); The main body edge of the basin frame (1) is provided with a mounting hole (14).

10. A small speaker using composite drum paper according to claim 9, characterized in that: include: A terminal (15) electrically connected to the voice coil (2) is provided in the middle of the bottom surface of the basin frame (1) for transmitting an electrical signal corresponding to the audio to the voice coil (2).

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