Supportless inner welded loudspeaker

Abstract

The utility model discloses a kind of inner welding type loudspeakers without support, including vibration system and magnetic circuit system, magnetic circuit system includes side magnetic steel, the upper of side magnetic steel is equipped with a annular magnetic conducting sheet, annular magnetic conducting sheet is equipped with FPC board, FPC board includes annular main part and backing plate part, and the vibration system is located at the backing plate part;The backing plate part is open-loop structure, and the front sound outlet is formed between the two ends of backing plate part, and the inner pad of annular main part is exposed in the front sound outlet.By using flexible circuit board replaces traditional hard circuit board, the annular main part of FPC board is positioned on annular magnetic conducting sheet, and vibration system is located on the backing plate part of FPC board, so as to cancel support, reduce the weight of product and the volume of the product, more suitable for electronic product with limited space, and the inner pad position is ingeniously arranged at the front sound outlet position, without occupying other positions of product, can further reduce the volume of product.

Description

Technical Field

[0001] This utility model relates to the field of loudspeakers, and in particular to a bracketless, internally welded loudspeaker. Background Technology

[0002] A loudspeaker is an important acoustic component in electronic devices. It converts electrical signals into sound and is a transducer.

[0003] Traditional loudspeakers typically have a plastic bracket, which serves as a support and is used to mount circuit boards and vibration systems. Due to the presence of the plastic bracket, the loudspeaker is designed to be relatively large, making it unsuitable for some electronic products with limited installation space. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a bracketless, internally welded loudspeaker, which solves the problem that large loudspeakers are not suitable for installation in limited installation space.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a bracketless internally welded loudspeaker, comprising a vibration system and a magnetic circuit system. The magnetic circuit system includes a side magnet, an annular magnetic guide sheet is disposed above the side magnet, and an FPC board is disposed on the annular magnetic guide sheet. The FPC board includes an annular main body portion disposed on the top surface of the annular magnetic guide sheet and a pad portion integrally formed and connected to the top surface of the annular main body portion. The vibration system is disposed on the pad portion. The pad portion has an open-loop structure, and a front sound outlet is formed between the two ends of the pad portion. The inner welding pad on the annular main body portion is exposed outside the front sound outlet.

[0006] In one embodiment, the inner periphery of the top surface of the annular magnetic sheet is provided with an inner ring flange protruding upward, and the inner ring flange is an open ring structure adapted to the pad portion; the inner side of the annular main body portion is positioned against the inner ring flange.

[0007] In one embodiment, the magnetic circuit system further includes an intermediate magnet, the side magnets are located on the outer periphery of the intermediate magnet, and a magnetic gap is formed between the side magnets and the intermediate magnet; the top surface of the intermediate magnet is provided with a central magnetic guide sheet.

[0008] In one embodiment, the intermediate magnet is cylindrical, the side magnet is annular, and the side magnet is fitted onto the intermediate magnet.

[0009] In one embodiment, the bottom surface of the middle magnet and the side magnet is provided with a bottom magnetic guide plate, the bottom magnetic guide plate is provided with a rear sound outlet that connects to the magnetic gap, and the rear sound outlet is provided with a sound outlet mesh.

[0010] In one embodiment, slots are provided on both sides of the bottom magnetic sheet.

[0011] In one embodiment, the FPC board further includes a bent extension and an outer welding portion. The bent extension extends downward from the annular main body at the front sound outlet position. The outer welding portion extends downward from the end of the bent extension and is attached to the bottom surface of the bottom magnetic sheet. The bottom surface of the outer welding portion has an outer welding pad.

[0012] In one embodiment, the outer surface of the edge magnet has a plane, and the bent extension is arranged in contact with the plane.

[0013] In one embodiment, the vibration system includes a washer ring disposed on the top surface of the pad portion, a diaphragm whose outer edge is bonded and fixed to the top surface of the washer ring, and a voice coil welded to the inner side of the diaphragm, the voice coil moving within the magnetic gap.

[0014] In one embodiment, a front cover is provided on the upper end of the outer surface of the edge magnet, the front cover covers the vibration system, and through holes are provided on the top surface of the front cover and at the position of the front sound outlet.

[0015] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0016] By using a flexible printed circuit board (FPC) instead of a traditional rigid circuit board, the annular main body of the FPC board is positioned on an annular magnetic sheet, and the vibration system is located on the pad of the FPC board, thereby eliminating the bracket, reducing the product weight and size, making it more suitable for electronic products with limited space. Furthermore, the internal solder pads are cleverly positioned at the front sound outlet, without occupying other space on the product, which further reduces the product size.

[0017] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a perspective view of the loudspeaker according to an embodiment of the present invention;

[0019] Figure 2 This is a perspective view of the speaker concealed front cover according to an embodiment of this utility model;

[0020] Figure 3 This is a cross-sectional view of a loudspeaker according to an embodiment of the present invention;

[0021] Figure 4 This is an exploded view of a loudspeaker according to an embodiment of this utility model;

[0022] Figure 5This is a perspective view of the FPC board according to an embodiment of the present invention.

[0023] Figure label:

[0024] 10. Vibration system 11. Washer ring

[0025] 12. Diaphragm 13. Voice coil

[0026] 20. Magnetic circuit system 21. Side magnet

[0027] 22. Circular magnetic sheet; 23. Intermediate magnet.

[0028] 24. Central magnetic plate; 25. Bottom magnetic plate

[0029] 211, Plane 201, Magnetic Gap

[0030] 221, Inner ring flange; 251, Locking groove

[0031] 30. FPC board; 31. Circular main body.

[0032] 32. Pad section; 33. Bending extension section

[0033] 34. External welding part 301, internal welding pad

[0034] 302, External solder pads; 40, Sound mesh.

[0035] 50. Front cover 51. Through hole. Detailed Implementation

[0036] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0037] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0038] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] Please see Figures 1 to 5 As shown, this application provides a bracketless, internally welded loudspeaker, which eliminates the plastic bracket, reduces the space occupied by the bracket, and also reduces weight. The maximum height of this loudspeaker is 3.48mm and the maximum width is 4.2mm, which greatly reduces its volume compared to traditional loudspeakers with plastic brackets.

[0041] The loudspeaker includes a vibration system 10 and a magnetic circuit system 20. The magnetic circuit system 20 includes a side magnet 21, and an annular magnetic guide plate 22 is disposed above the side magnet 21. An FPC board 30 is disposed on the annular magnetic guide plate 22. The FPC board 30 (flexible circuit board) includes an annular main body 31 disposed on the top surface of the annular magnetic guide plate 22 and a pad portion 32 integrally formed and connected to the top surface of the annular main body 31. The vibration system 10 is disposed on the pad portion 32. The pad portion 32 increases the height of the vibration system 10, thereby having a larger vibration deformation space. The pad portion 32 has an open-loop structure, and a front sound outlet 101 is formed between the two ends of the pad portion 32. The inner solder pad 301 on the annular main body 31 is exposed in the front sound outlet 101, and the leads of the vibration system 10 are soldered to the inner solder pad 301. By using a flexible printed circuit board (FPC) instead of a traditional rigid circuit board, the annular main body of the FPC board is positioned on an annular magnetic sheet, and the vibration system is located on the pad of the FPC board, thereby eliminating the bracket, reducing the product weight and size, making it more suitable for electronic products with limited space. Furthermore, the internal solder pads are cleverly positioned at the front sound outlet, without occupying other space on the product, which further reduces the product size.

[0042] For example, the annular main body 31 can be attached to the annular magnetic sheet by adhesive or welding.

[0043] For example, the front sound outlet 101 is elongated to ensure its output volume.

[0044] The inner periphery of the top surface of the annular magnetic sheet 22 has an inner ring flange 221 protruding upward. The inner ring flange 221 is an open ring structure that is adapted to the pad portion 32. The inner side of the annular main body portion 31 is positioned against the inner ring flange 221, so that the FPC is more securely installed on the annular magnetic sheet 22.

[0045] The magnetic circuit system 20 also includes a central magnet 23, with the edge magnet 21 located around the central magnet 23, and a magnetic gap 201 formed between the edge magnet 21 and the central magnet 23. The top surface of the central magnet 23 is provided with a central magnetic guide plate 24, employing a double-magnet structure, which effectively improves product performance. In a specific embodiment, the central magnet 23 is cylindrical, and the edge magnet 21 is annular, with the edge magnet 21 fitted onto the central magnet 23. This double-magnet structure with a circular cross-section further reduces the product's size compared to traditional square loudspeakers.

[0046] The bottom surfaces of the intermediate magnet 23 and the side magnet 21 are provided with a bottom magnetic guide plate 25. A rear sound outlet 102 with a connecting magnetic gap 201 is provided on the bottom magnetic guide plate 25. Exemplarily, the rear sound outlet 102 is a circular hole. A sound outlet mesh 40 is provided on the rear sound outlet 102 for dust prevention and other functions. Positioning grooves 251 are provided on both sides of the bottom magnetic guide plate 25 for positioning and installing the speaker on electronic products.

[0047] The FPC board 30 also includes a bent extension portion 33 and an outer welding portion 34. The bent extension portion 33 extends downward from the annular main body 31 at the front sound outlet 101. The outer welding portion 34 extends downward from the end of the bent extension portion 33 and is attached to the bottom surface of the bottom magnetic sheet 25. The bottom surface of the outer welding portion 34 has an outer welding pad 302 for connecting other wires. Since the FPC board is a flexible material, bending the bent extension portion 33 and the outer welding portion 34 is more convenient. Furthermore, the fact that the bent extension portion 33 is attached to the outer surface of the edge magnet 21 and the outer welding portion 34 is attached to the bottom surface of the bottom magnetic sheet 25 effectively reduces the occupied area. Specifically, the outer surface of the edge magnet 21 has a plane 211, and the bent extension portion 33 is arranged on the plane 211.

[0048] The vibration system 10 includes a washer ring 11 disposed on the top surface of the pad portion 32, a diaphragm 12 whose outer edge is bonded and fixed to the top surface of the washer ring 11, and a voice coil 13 welded to the inner side of the diaphragm 12. Exemplarily, the bottom surface of the washer ring 11 is bonded to the top surface of the pad portion 32 with adhesive. The outer edge of the diaphragm 12 is bonded and fixed to the washer ring 11, thereby increasing the bonding area of ​​the diaphragm 12 and increasing the radiation area of ​​the speaker, maximizing the radiation area of ​​the speaker, thus improving the acoustic performance of the speaker. The voice coil is welded inside the product, effectively protecting the voice coil leads from external damage. The voice coil 13 moves within the magnetic gap 201, with its lower end inserted into the magnetic gap. When an alternating acoustic wave electrical signal is transmitted through the voice coil 13, the voice coil 13 moves up and down within the magnetic gap, cutting magnetic lines of force.

[0049] A front cover 50 is provided on the upper end of the outer surface of the edge magnet 21. The front cover 50 covers the vibration system 10, and through holes 51 are provided on the top surface of the front cover 50 and at the position of the front sound outlet 101. The front cover 50 serves to protect the vibration system 10.

[0050] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A bracketless, internally welded loudspeaker, comprising a vibration system and a magnetic circuit system, the magnetic circuit system comprising a side magnet, and an annular magnetic guide plate disposed above the side magnet, characterized in that, The annular magnetic sheet is provided with an FPC board. The FPC board includes an annular main body part disposed on the top surface of the annular magnetic sheet and a pad part integrally formed and connected to the top surface of the annular main body part. The vibration system is disposed on the pad part. The pad part has an open-loop structure, and a front sound outlet is formed between the two ends of the pad part. The inner solder pad on the annular main body part is exposed to the front sound outlet.

2. The bracketless, internally welded loudspeaker according to claim 1, characterized in that: The inner periphery of the top surface of the annular magnetic conductive sheet is provided with an inner ring flange that protrudes upward. The inner ring flange is an open ring structure that is adapted to the pad portion. The inner side of the annular main body portion is positioned against the inner ring flange.

3. The bracketless, internally welded loudspeaker according to claim 1, characterized in that: The magnetic circuit system further includes an intermediate magnet, and the side magnets are located on the outer periphery of the intermediate magnet, with a magnetic gap formed between the side magnets and the intermediate magnet; the top surface of the intermediate magnet is provided with a central magnetic guide plate.

4. The bracketless, internally welded loudspeaker according to claim 3, characterized in that: The middle magnet is cylindrical, and the side magnet is annular, with the side magnet fitted over the middle magnet.

5. The bracketless, internally welded loudspeaker according to claim 3, characterized in that: The bottom surface of the middle magnet and the side magnet is provided with a bottom magnetic guide plate, and the bottom magnetic guide plate is provided with a rear sound outlet that connects the magnetic gap. The rear sound outlet is provided with a sound outlet mesh.

6. The bracketless, internally welded loudspeaker according to claim 5, characterized in that: The bottom magnetic conductive sheet has slots on both sides.

7. The bracketless, internally welded loudspeaker according to claim 5, characterized in that: The FPC board also includes a bent extension and an outer welding part. The bent extension extends downward from the annular main body at the front sound outlet position. The outer welding part extends downward from the end of the bent extension and is attached to the bottom surface of the bottom magnetic sheet. The bottom surface of the outer welding part has an outer welding disk.

8. The bracketless, internally welded loudspeaker according to claim 7, characterized in that: The outer surface of the edge magnet has a plane, and the bent extension is arranged in contact with the plane.

9. The bracketless, internally welded loudspeaker according to claim 3, characterized in that: The vibration system includes a washer ring disposed on the top surface of the pad plate, a diaphragm whose outer edge is bonded and fixed to the top surface of the washer ring, and a voice coil welded to the inner side of the diaphragm. The voice coil moves within the magnetic gap.

10. The bracketless, internally welded loudspeaker according to claim 1, characterized in that: The outer surface of the edge magnet is covered with a front cover, which covers the vibration system. The top surface of the front cover and the position of the front sound outlet are both provided with through holes.

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