FPC (Flexible Printed Circuit) plane diaphragm loudspeaker

Abstract

The utility model discloses a flexible printed circuit (FPC) plane diaphragm loudspeaker, which relates to the technical field of plane diaphragms and comprises an upper cover combination. The upper cover combination comprises a top cover, and a clamping groove is formed in the bottom of the top cover. Rectangular grooves are formed in the two ends of the top cover; a diaphragm is arranged in the top cover; the diaphragm comprises an FPC (Flexible Printed Circuit) board, one end of the FPC board is integrally provided with a bonding pad; the bonding pad penetrates through a rectangular groove formed in one end of the top cover and extends to the outer side of the top cover; the bottom of the top cover is combined, clamped and matched with the lower cover; when in use, the FPC board is installed inside the flat washer, the pin at one end of the FPC board passes through the opening and closing notch on the flat washer and penetrates through the rectangular groove arranged at the end part of the top cover to extend to the outer side of the top cover, and the runway is arranged between the diaphragm and the flat washer, so that uniform vibration of the diaphragm during conversion is effectively ensured.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of planar diaphragms, in particular to an FPC planar diaphragm speaker. Background Art

[0002] Speakers are a commonly used electroacoustic transducer, which is widely used in electronic and electrical equipment that produces sound. Electrodynamic speakers are also called dynamic speakers, which are electroacoustic transducers that use electric force. Electrodynamic speakers are widely favored by users due to their simple structure, easy production, and excellent performance. They are currently the most widely used speakers.

[0003] There are usually two types of conventional planar diaphragms. One is to plate a diaphragm with a metal layer, and then carve out corresponding circuits on the metal layer. This method is very costly. The other is to use a diaphragm frame, a folded ring, a ball top, etc., and then bond the coil to the ball top. This method has many process steps, and the coil wire is easier to break during the process, so the reliability is poor, and the error is relatively large.

[0004] After searching, Chinese patent publication number CN202111209409.0 discloses a planar diaphragm speaker; including a housing, a vibration diaphragm group, and two magnet groups; the two magnet groups are fixed in the housing, the vibration diaphragm group is located between the two magnet groups and is spaced apart from the two magnet groups; the magnet group includes an annular outer magnet and an inner magnet, and a magnetic gap is formed between the outer wall surface of the inner magnet and the inner wall surface of the outer magnet; the vibration diaphragm group includes a diaphragm and a voice coil, and a groove is provided on the diaphragm; the effective width portion of the voice coil spans the magnetic gap, and the width of the effective width portion is greater than or equal to the width of the magnetic gap;

[0005] When the device in the above patent is performing conversion, it is necessary to provide gaskets on both sides of the vibrating diaphragm group. This will cause the distance between the diaphragm and the magnet to increase during the conversion. This cannot effectively ensure the effective vibration of the diaphragm during the conversion. In addition, the structure in the above patent achieves control between high and low frequencies by increasing the thickness of the voice coil. This can easily cause the sounds to cross each other and produce impurities during use.

[0006] In view of the above situation, we provide an FPC planar diaphragm speaker. In this device, the diaphragm is installed inside the top cover, and a flat washer and a runway are provided on the edge. The bottom of the flat washer and the runway fit with the top of the external magnet and the internal magnet inside the mounting shell. In this way, the overall vibration of the diaphragm is effectively guaranteed during energy conversion. The top cover and the mounting shell are effectively installed through the cooperation between the slot and the Y-shaped clip, so that nail-free installation can be achieved. The slot and the Y-shaped clip can effectively realize the assembly and disassembly between the top cover and the mounting shell. Utility Model Content

[0007] The purpose of the utility model is to provide an FPC planar diaphragm speaker. In this device, the diaphragm is installed inside the top cover, and the top cover and the mounting shell are matched by the slot and the Y-shaped clip to effectively achieve the installation effect. In use, the vibration of the diaphragm is effectively achieved through the fit of the external magnet and the internal magnet inside the mounting shell with the flat gasket and the FPC board. In this way, the sound quality is effectively guaranteed during the conversion. In addition, in this device, the slot and the Y-shaped clip can effectively achieve rapid assembly and disassembly, so as to solve the problems of the above-mentioned background technology.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] An FPC planar diaphragm speaker comprises an upper cover assembly; the upper cover assembly comprises a top cover, a slot is provided at the bottom of the top cover; rectangular slots are provided at both ends of the top cover;

[0010] A diaphragm is arranged inside the top cover; the diaphragm includes an FPC board; a solder pad is integrally arranged at one end of the FPC board; the solder pad passes through a rectangular groove opened at one end of the top cover and extends to the outside of the top cover;

[0011] The bottom of the top cover is assembled and snap-fitted with the lower cover.

[0012] As a further technical solution of the utility model, the lower cover assembly includes a mounting shell, a Y-shaped buckle is provided on the top of the mounting shell, and the Y-shaped buckle is fixed with the slot; the mounting shell is embedded with an external magnet and an internal magnet; the height of the external magnet and the internal magnet is higher than the height of the mounting shell; in this device, the top cover and the mounting shell are effectively installed quickly through the cooperation between the slot and the Y-shaped buckle system, and the internal structure is effectively sealed to prevent dust from entering;

[0013] As a further technical solution of the utility model, a flat washer is provided at the edge of the FPC board; there is a 0.1mm-0.5mm gap between the bottom of the flat washer and the external magnet and the internal magnet; the vibration of the FPC board and the runway is ensured; a notch is provided at one end of the flat washer; a notch is provided at one end of the flat washer.

[0014] As a further technical solution of the utility model, a runway is provided between the flat washer and the FPC board, and the runway is provided in an open shape, wherein both ends of the opening of the runway are fitted with the pads, so as to ensure that the FPC board effectively drives the pads when vibrating;

[0015] As a further technical solution of the utility model, the FPC board is engraved with circuits twice; wherein there is a 0.1mm-0.5mm gap between the FPC board and the bottom of the external magnet and the internal magnet, which can effectively reduce the gap between the magnetic group and the FPC board, ensuring uniform vibration of the FPC board;

[0016] As a further technical solution of the utility model, the diaphragm extends the welding pad to the outside of the top cover through one end of the flat gasket with a notch.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. In the utility model, when in use, the FPC board is installed inside the flat washer, and the pad at one end of the FPC board is extended to the outside of the top cover through the notch opened and closed on the flat washer and through the rectangular groove opened at the end of the top cover. A runway is provided between the diaphragm and the flat washer, which effectively ensures uniform vibration of the diaphragm during conversion;

[0019] 2. In the present invention, the card slot provided at the bottom of the top cover is effectively connected with the Y-shaped card buckle provided at the top of the mounting shell, so that the upper cover assembly and the lower cover assembly can be quickly assembled;

[0020] 3. In the utility model, the tops of the external magnet and the internal magnet installed inside the mounting shell fit with the bottoms of the diaphragm and the flat washer, so that during conversion, the vibration of the diaphragm by the external magnet and the internal magnet is effectively realized, ensuring uniform vibration of the diaphragm, so that the sound quality of the planar diaphragm speaker can be effectively guaranteed during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0022] Figure 2 This utility model Figure 1 Schematic diagram of the splitting.

[0023] Figure 3 This utility model Figure 2 Bottom view of the bottom structure.

[0024] Figure 4 This utility model Figure 2 Schematic diagram of further decomposition.

[0025] Figure 5 This utility model Figure 4 Schematic diagram of the internal structure of the top cover.

[0026] Figure 6 This utility model Figure 1 A magnified view of the local structure at A.

[0027] In the figure: 1-upper cover assembly, 10-top cover, 11-card slot, 12-rectangular slot, 2-lower cover assembly 20-mounting shell, 21-Y-type buckle, 22-external magnet, 23-internal magnet, 3-diaphragm, 30-soldering pad, 31-FPC board, 4-flat washer, 5-runway. DETAILED DESCRIPTION

[0028] 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.

[0029] See also Figure 1-6 In the embodiment of the utility model, an FPC planar diaphragm speaker includes an upper cover assembly 1; the upper cover assembly 1 includes a top cover 10, and a card slot 11 is opened at the bottom of the top cover 10; both ends of the top cover 10 are opened with rectangular slots 12;

[0030] The top cover 10 is provided with a diaphragm 3 inside; the diaphragm 3 includes an FPC board 31; a solder pad 30 is integrally provided at one end of the FPC board 31; the solder pad 30 passes through a rectangular groove 12 opened at one end of the top cover 10 and extends to the outside of the top cover 10;

[0031] The bottom of the top cover 10 is snap-fitted with the lower cover assembly 2 .

[0032] To be more specific, the lower cover assembly 2 includes a mounting shell 20, a Y-shaped buckle 21 is provided on the top of the mounting shell 20, and the Y-shaped buckle 21 is fixed to the slot 11; the mounting shell 20 is embedded with an external magnet 22 and an internal magnet 23; the height of the external magnet 22 and the internal magnet 23 is higher than the height of the mounting shell 20.

[0033] By adopting the above technical solution, when in use, the FPC board 31 is installed inside the flat washer 4, and the pin 30 at one end of the FPC board 31 is extended to the outside of the top cover 10 through the notch opened and closed on the flat washer 4 and through the rectangular groove 12 opened at the end of the top cover 10, and a runway 5 is provided between the diaphragm 3 and the flat washer 4, which effectively ensures the uniform vibration of the diaphragm 3 during the conversion;

[0034] A flat washer 4 is provided at the edge of the FPC board 31; there is a gap of 0.1mm-0.5mm between the bottom of the flat washer 4 and the external magnet 22 and the internal magnet 23 to ensure vibration of the FPC board and the runway; a notch is provided at one end of the flat washer 4.

[0035] In this embodiment, a track 5 is provided between the flat washer 4 and the FPC board 31 . The track 5 is provided in an open shape, wherein both ends of the opening of the track 5 are in contact with the pads 30 .

[0036] By adopting the above technical solution, the card slot 11 provided at the bottom of the top cover 10 is effectively connected with the Y-shaped card buckle 21 provided at the top of the mounting shell 20, so that the upper cover assembly 1 and the lower cover assembly 2 can be quickly assembled.

[0037] In this embodiment, the FPC board 31 is engraved with circuits twice; wherein there is a gap of 0.1mm-0.5mm between the FPC board 31 and the bottom of the external magnet 22 and the internal magnet 23;

[0038] The diaphragm 3 extends the pad 30 to the outside of the top cover 10 through the end of the flat gasket 4 with a notch.

[0039] By adopting the above technical solution, the tops of the external magnet 22 and the internal magnet 23 installed inside the mounting shell 20 fit with the bottoms of the diaphragm 3 and the flat washer 4, so that during conversion, the external magnet 22 and the internal magnet 23 can effectively vibrate the diaphragm 3, ensuring uniform vibration of the diaphragm 3. In this way, the sound quality of the planar diaphragm speaker can be effectively guaranteed during use.

[0040] The working principle of the utility model is: when in use, the FPC board 31 is installed inside the flat washer 4, the pin 30 at one end of the FPC board 31 is extended to the outside of the top cover 10 through the notch opened and closed on the flat washer 4 and through the rectangular groove 12 opened at the end of the top cover 10, and a runway 5 is provided between the diaphragm 3 and the flat washer 4, which effectively ensures the uniform vibration of the diaphragm 3 during the conversion;

[0041] The card slot 11 arranged at the bottom of the top cover 10 is effectively connected with the Y-shaped card buckle 21 arranged at the top of the mounting shell 20, so as to realize the rapid assembly between the upper cover assembly 1 and the lower cover assembly 2, and at the same time ensure the sealing between the upper cover assembly 1 and the lower cover assembly 2, so as to prevent the dust from entering the interior and affecting the vibration efficiency of the diaphragm;

[0042] The tops of the external magnet 22 and the internal magnet 23 installed inside the mounting shell 20 fit with the bottoms of the diaphragm 3 and the flat washer 4, so that during conversion, the external magnet 22 and the internal magnet 23 can effectively vibrate the diaphragm 3, ensuring uniform vibration of the diaphragm 3. This can effectively ensure the sound quality of the planar diaphragm speaker when in use.

[0043] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An FPC planar diaphragm speaker, characterized in that: The upper cover assembly (1) comprises a top cover (10), the bottom of the top cover (10) is provided with a slot (11); both ends of the top cover (10) are provided with rectangular slots (12); A diaphragm (3) is arranged inside the top cover (10); the diaphragm (3) comprises an FPC board (31); a soldering pad (30) is integrally arranged at one end of the FPC board (31); the soldering pad (30) passes through a rectangular groove (12) provided at one end of the top cover (10) and extends to the outside of the top cover (10); The bottom of the top cover (10) is snap-fitted with the lower cover assembly (2).

2. The FPC planar diaphragm speaker according to claim 1, characterized in that: The lower cover assembly (2) comprises a mounting shell (20), the top of which is provided with a Y-shaped buckle (21), and the Y-shaped buckle (21) is fixedly connected to the slot (11); the mounting shell (20) is embedded with an external magnet (22) and an internal magnet (23); the heights of the external magnet (22) and the internal magnet (23) are higher than the height of the mounting shell (20).

3. The FPC planar diaphragm speaker according to claim 1, characterized in that: A flat washer (4) is arranged at the edge of the FPC board (31); a gap of 0.1 mm to 0.5 mm is provided between the bottom of the flat washer (4) and the external magnet (22) and the internal magnet (23); and a notch is provided at one end of the flat washer (4).

4. The FPC planar diaphragm speaker according to claim 3, characterized in that: A runway (5) is arranged between the flat washer (4) and the FPC board (31), and the runway (5) is arranged in an open shape, wherein both ends of the opening of the runway (5) are in contact with the pad (30).

5. The FPC planar diaphragm speaker according to claim 4, characterized in that: The FPC board (31) is engraved with circuits twice; wherein a gap of 0.1 mm to 0.5 mm is provided between the FPC board (31) and the bottoms of the external magnet (22) and the internal magnet (23).

6. The FPC planar diaphragm speaker according to claim 1, characterized in that: The diaphragm (3) extends the welding pad (30) to the outside of the top cover (10) through one end of the flat gasket (4) with a notch.

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