Centering disk and loudspeaker

Abstract

The utility model relates to a centring disk and loudspeaker belongs to loudspeaker technical field, the centring disk includes one or more centring disk, the centring disk is equipped with the pad, the pad from top to bottom includes tinned pad layer, right side copper foil layer, centring disk base material layer, back side copper foil layer, cover film, the tin-plated pad layer, the right side copper foil layer, the centring disk base material layer, the back side copper foil layer, cover film, the tin-plated pad layer, the right side copper foil layer and the back side copper foil layer. Through holes are formed in the front copper foil layer and the centering disk base material layer, the through holes penetrate through the front copper foil layer and the centering disk base material layer, and tinning is arranged in the through holes so that the front copper foil layer can be communicated with the back copper foil layer. The bonding force is increased between the front copper foil layer and the back copper foil layer, so that the stripping force between the front copper foil layer and the centering disk base material layer is increased, and the risk of wire breakage caused by separation of the whole bonding pad copper foil and the centering disk base material layer after the front copper foil layer is heated and stressed during spot welding can be obviously reduced.

Description

Technical Field

[0001] The utility model relates to a centering support piece and a loudspeaker, belonging to the technical field of loudspeakers. Background Art

[0002] With the gradual development of products such as mobile phones, tablets, and TWS earphones, people's requirements for the performance indicators of horn loudspeakers are getting higher and higher. Limited by the height and position of the voice coil, the performance of the loudspeaker cannot reach the optimum. In order to improve the performance of the loudspeaker, a centering support piece is generally used to make the voice coil in the position where the magnetic induction lines are the most concentrated, increase the amplitude, and suppress roll vibration, thereby improving the performance of the loudspeaker. The current loudspeaker includes a chassis, a centering support piece is arranged on the chassis, a voice coil is arranged on the centering support piece, and the voice coil lead of the voice coil is welded on a pad. The pad and the voice coil lead are spot welded. During spot welding, due to the trigger of the pressure of the spot welding head, the pad is prone to deformation after being heated and stressed, resulting in the problem that the copper foil on the pad breaks away and breaks. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies of the above-mentioned traditional technologies, and provide a centering support piece and a loudspeaker. By setting tin plating in the through hole to connect the front copper foil layer and the back copper foil layer, the risk of disconnection caused by the separation of the entire pad copper foil from the centering support piece substrate layer after the front copper foil layer is heated and stressed during spot welding can be significantly reduced.

[0004] The purpose of the utility model is achieved by the following technical measures: A centering support piece is provided with a pad on it. The pad includes a tin-plated pad layer, a front copper foil layer, a centering support piece substrate layer, a back copper foil layer, and a cover film from top to bottom. Through holes are arranged in the front copper foil layer and the centering support piece substrate layer, and the through holes penetrate through the front copper foil layer and the centering support piece substrate layer. Tin plating is arranged in the through holes to connect the front copper foil layer and the back copper foil layer.

[0005] As a further improvement of the above technical solution:

[0006] The centering support piece is a double-sided board structure, and the double-sided board structure includes a double-sided board with adhesive substrate and a double-sided board without adhesive substrate.

[0007] The through hole is one or more.

[0008] The total area of the through holes is less than 1 / 3 of the area of the pad.

[0009] The position of the through hole is close to the circumference of the pad.

[0010] The shape of the through hole is circular or semi-circular or other irregular shapes.

[0011] The material of the centering support piece substrate layer is polyimide or polyester, and the thickness is 12.5 µm - 125 µm.

[0012] The front copper foil layer and the back copper foil layer are electrolytic copper foil (ED) or rolled copper foil (RA), and the thickness is 1 / 3 OZ or 1 / 2 OZ or 1 OZ or 2 OZ.

[0013] The cover film is polyimide or polyester, and the thickness is 12.5 µm - 125 µm.

[0014] A loudspeaker includes a speaker frame, on which the above-mentioned centering washer is provided. The number of centering washers is one or more. A voice coil is provided on the centering washer, and the voice coil lead of the voice coil is welded to the pad.

[0015] Due to the adoption of the above technical solution, compared with the prior art, the advantages of the present utility model are as follows: By setting tin plating in the through hole to connect the front copper foil layer and the back copper foil layer, the binding force between the front copper foil layer and the back copper foil layer is increased, and further the peeling force between the front copper foil layer and the centering washer substrate layer is increased, which can significantly reduce the risk of disconnection caused by the separation of the entire pad copper foil from the centering washer substrate layer when the front copper foil layer is heated and stressed during spot welding.

[0016] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of a centering washer in an embodiment of the present utility model;

[0018] Figure 2 For Figure 2 the bottom view;

[0019] Figure 3 For Figure 3 the partial enlarged view of part A in

[0020] Figure 4 It is a schematic structural diagram of a loudspeaker in an embodiment of the present utility model.

[0021] In the figure, 1 - centering washer, 2 - speaker frame, 3 - voice coil, 4 - pad, 5 - voice coil lead, 6 - tin-plated pad layer, 7 - front copper foil layer, 8 - centering washer substrate layer, 9 - back copper foil layer, 10 - cover film, 11 - through hole. Specific Embodiments

[0022] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined. Embodiment

[0025] As Figures 1-3 shown, a centering support piece, a solder pad 4 is provided on the centering support piece 1. The solder pad 4 sequentially includes a tin-plated solder pad layer 6, a front copper foil layer 7, a centering support piece base material layer 8, a back copper foil layer 9, and a cover film 10 from top to bottom. Through holes 11 are provided in the front copper foil layer 7 and the centering support piece base material layer 8, and the through holes 11 penetrate through the front copper foil layer 7 and the centering support piece base material layer 8.

[0026] The centering support piece 1 has a double-sided board structure, that is, the front copper foil layer 7 and the back copper foil layer 9 are respectively arranged on both sides of the centering support piece base material layer 8. The double-sided board structure includes a double-sided board with adhesive base material and a double-sided board without adhesive base material, that is, there is adhesive or no adhesive between the centering support piece base material layer 8 and the front copper foil layer 7 and the back copper foil layer 9.

[0027] The material of the centering support piece base material layer 8 is polyimide or polyester, and the thickness is 12.5 µm - 125 µm, which is 25 µm in this embodiment; the front copper foil layer 7 and the back copper foil layer 9 are electrolytic copper foil (ED) or rolled copper foil (RA), and the thickness is 1 / 3 OZ or 1 / 2 OZ or 1 OZ or 2 OZ, etc.; the cover film 10 is polyimide or polyester, and the thickness is 12.5 µm - 125 µm, which is 25 µm in this embodiment.

[0028] There is one through hole 11, and its shape is circular. There can also be multiple through holes 11, and the shape of the through holes 11 can also be semi-circular or other irregular shapes. The total area of the through holes 11 is less than 1 / 3 of the area of the pad 4 to ensure the overall support strength of the pad 4 and the width of the copper foil trace. The position of the through holes 11 is close to the circumference of the pad 4 to avoid the spot welding position under the voice coil lead 5, preventing the tin plating from melting completely due to heat during spot welding and losing the bonding strength of the original cured state. Tin plating is provided inside the through holes 11 to connect the front copper foil layer 7 and the back copper foil layer 9, increasing the binding force between the front copper foil layer 7 and the back copper foil layer 9, and further increasing the peeling force between the front copper foil layer 7 and the centering support substrate layer 8. The risk of disconnection caused by the separation of the entire pad copper foil from the centering support substrate layer 8 when the front copper foil layer 7 is heated and stressed during spot welding can be significantly reduced.

[0029] As Figure 4 shown, a loudspeaker using the above centering support includes a chassis 2, two centering supports 1 are provided on the chassis 2, and a voice coil 3 is provided on the two centering supports 1. The voice coil lead 5 of the voice coil 3 is welded to the pad 4.

[0030] The number of centering supports 1 can also be one, and it is provided below the voice coil 3.

[0031] The number of centering supports 1 can also be multiple, and they are provided below the voice coil and arranged symmetrically about the center of the voice coil 3.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A centering support, characterized in that: A soldering pad (4) is provided on the centering support sheet (1), and the soldering pad (4) comprises, from top to bottom, a tinned soldering pad layer (6), a front copper foil layer (7), a centering support sheet substrate layer (8), a back copper foil layer (9), and a covering film (10). A through hole (11) is provided in the front copper foil layer (7) and the centering support sheet substrate layer (8), and the through hole (11) penetrates the front copper foil layer (7) and the centering support sheet substrate layer (8). Tin is provided in the through hole (11) so as to connect the front copper foil layer (7) and the back copper foil layer (9).

2. A centering support according to claim 1, characterized in that: The centering support sheet (1) is a double-sided board structure, and the double-sided board structure includes a double-sided board with a glue substrate and a double-sided board without a glue substrate.

3. A centering support according to claim 1, characterized in that: There are one or more through holes (11).

4. A centering support according to claim 3, characterized in that: The total area of ​​the through holes (11) is less than 1 / 3 of the area of ​​the pad (4).

5. A centering support according to claim 4, characterized in that: The through hole (11) is located close to the periphery of the solder pad (4).

6. The centering support according to claim 1, characterized in that: The through hole (11) is circular or semicircular in shape.

7. The centering support according to claim 1, characterized in that: The centering support sheet substrate layer (8) is made of polyimide or polyester and has a thickness of 12.5 µm-125 µm.

8. The centering support sheet according to claim 1, characterized in that: The front copper foil layer (7) and the back copper foil layer (9) are electrolytic copper foil (ED) or rolled copper foil (RA), and have a thickness of 1 / 3OZ, 1 / 2OZ, 1OZ or 2OZ.

9. The centering support according to claim 1, characterized in that: The covering film (10) is made of polyimide or polyester and has a thickness of 12.5 µm-125 µm.

10. A speaker, characterized in that: The invention comprises a basin frame (2), on which a centering support plate (1) as claimed in any one of claims 1 to 9 is arranged, the number of the centering support plates (1) being one or more, a voice coil (3) being arranged on the centering support plate (1), and a voice coil lead (5) of the voice coil (3) being welded to a pad (4).

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