Sound production device and electronic equipment

Abstract

The invention discloses a sound production device and electronic equipment. The sounding device comprises a vibrating reed, a piezoelectric patch, a first support and a second support, wherein the vibrating reed is provided with a first surface and a second surface which are arranged back to back; the piezoelectric plate is connected with the first surface of the vibrating plate in a bonding manner, the sectional area of the piezoelectric plate is smaller than that of the vibrating plate, and the piezoelectric plate is located in the middle area of the first surface of the vibrating plate; the first support is annular, the first support is adhered to the edge area of the first surface of the vibration sheet, and the first support is arranged around the piezoelectric sheet; the second support is annular, and the second support is adhered to the edge area of the second surface of the vibrating reed.

Description

Technical Field

[0001] The present application relates to the technical field of electronic products, and more specifically, to a sound-generating device and an electronic device. Background Art

[0002] With the development of science and technology and the improvement of living standards, various electronic products have gradually entered thousands of households and become necessities of life; sound devices are installed in many electronic products, such as smart phones, laptops, tablets, etc.

[0003] In recent years, many electronic products have become increasingly thinner and smaller. This is especially true for smartphones, as their functionality increases and the number of components increases. Traditional electromagnetic voice coil-driven speakers are typically unable to simultaneously address all three frequency bands: low, mid, and high. Typically, consumer electronics incorporate a tweeter alongside a woofer, achieving full-band audio through a frequency divider. However, this structure is only suitable for products with ample space, such as tablets and laptops. Smaller products like smartphones lack the space to accommodate both a tweeter and a woofer, and this increases production costs.

[0004] In view of this, it is necessary to propose a new technical solution to solve the above technical problems. Summary of the Invention

[0005] One purpose of this application is to provide a new technical solution for a sound-generating device and an electronic device.

[0006] According to a first aspect of the present application, a sound-generating device is provided, comprising:

[0007] a vibration plate having a first surface and a second surface disposed opposite to each other;

[0008] a piezoelectric sheet, the piezoelectric sheet being adhesively connected to the first surface of the vibrating sheet, the cross-sectional area of the piezoelectric sheet being smaller than the cross-sectional area of the vibrating sheet, and the piezoelectric sheet being located in a central region of the first surface of the vibrating sheet;

[0009] a first bracket, the first bracket being annular and bonded to an edge area of the first surface of the vibrating plate, and the first bracket being disposed around the piezoelectric plate;

[0010] The second bracket is annular and adhered to the edge area of the second surface of the vibration plate.

[0011] Optionally, the piezoelectric piece is made of multi-layer bi-crystal ceramic.

[0012] Optionally, the piezoelectric plate is connected to the first surface of the vibration plate by bonding with a flexible adhesive.

[0013] Optionally, the cross-sectional area of the piezoelectric piece is 1 / 2 to 4 / 5 of the cross-sectional area of the vibration piece.

[0014] Optionally, the thickness of the vibration plate is 0.03-0.2 mm.

[0015] Optionally, the piezoelectric sheet has a thickness of 0.05 to 0.2 mm.

[0016] Optionally, the vibration plate is in the shape of a flat plate, and the width of the first bracket and the width of the second bracket are both 1 / 10 to 1 / 6 of the width of the vibration plate.

[0017] Optionally, the vibration plate includes a central portion, a folding ring portion and a fixing portion, the folding ring portion is connected to the central portion and is arranged around the central portion, and the fixing portion is connected to the folding ring portion and is arranged around the folding ring portion.

[0018] Optionally, the piezoelectric sheet is arranged corresponding to the central portion; and the first bracket and the second bracket are arranged corresponding to the fixed portion.

[0019] According to a second aspect of the present application, an electronic device is provided, comprising the sound-generating device as described in the first aspect.

[0020] In the sound-generating device provided in the embodiments of the present application, the vibration sound-generating assembly composed of a piezoelectric plate and a vibrating plate can effectively vibrate in both high-frequency and medium-low frequency ranges, thereby ensuring that the sound-generating device can produce sound in both low-, medium-, and high-frequency ranges, achieving relatively good sound effects across the entire audio frequency range. When the sound-generating device is applied to electronic products, there is no need to separately provide a tweeter and a mid-bass unit in the electronic product, thereby helping to reduce the size and cost of the electronic product.

[0021] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0023] Figure 1 This is a schematic diagram of the decomposition structure of a sound-generating device according to an embodiment of the present application. Figure 1 ;

[0024] Figure 2This is a schematic diagram of the decomposition structure of a sound-generating device according to an embodiment of the present application. Figure 2 ;

[0025] Figure 3 yes Figure 2 Schematic diagram of the structure of the vibration plate in the sound-generating device shown.

[0026] Description of reference numerals:

[0027] 1. Sound-generating device; 10. Vibrating plate; 101. Central portion; 102. Folding ring portion; 103. Fixing portion; 11. Piezoelectric plate; 12. First bracket; 13. Second bracket; 14. Flexible adhesive; 15. First adhesive layer; 16. Second adhesive layer. DETAILED DESCRIPTION

[0028] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application.

[0029] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0030] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0031] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0032] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0033] Reference Figures 1 to 3 As shown, according to one embodiment of the present application, a sound-generating device 1 is provided. The sound-generating device 1 includes a vibrating plate 10, a piezoelectric plate 11, a first bracket 12, and a second bracket 13. The vibrating plate 10 has a first surface and a second surface disposed opposite to each other. The piezoelectric plate 11 is adhesively connected to the first surface of the vibrating plate 10. The cross-sectional area of the piezoelectric plate 11 is smaller than the cross-sectional area of the vibrating plate 10, and the piezoelectric plate 11 is located in the middle area of the first surface of the vibrating plate 10.

[0034] The first bracket 12 is annular and is bonded to the edge area of the first surface of the vibration plate 10. The first bracket 12 is arranged around the piezoelectric plate 11; the second bracket 13 is annular and is bonded to the edge area of the second surface of the vibration plate 10.

[0035] In the sound-generating device 1 provided in the embodiments of the present application, the piezoelectric sheet 11 is one of its core components. The piezoelectric sheet 11 has two opposing surfaces. When a voltage is applied to the piezoelectric sheet 11, the piezoelectric sheet 11 expands and contracts between the two surfaces, thereby generating a vibration driving force. For example, the cross-section of the piezoelectric sheet 11 is rectangular; specifically, the piezoelectric sheet 11 is a thin rectangular parallelepiped.

[0036] The vibrating plate 10 has a first surface and a second surface disposed opposite each other. The piezoelectric plate 11 is bonded to the first surface of the vibrating plate 10. When the piezoelectric plate 11 vibrates under the action of a voltage, it drives the vibrating plate 10 to vibrate synchronously, thereby producing sound. For example, the vibrating plate 10 has a rectangular cross-section; specifically, the vibrating plate 10 is a thin rectangular parallelepiped.

[0037] The first and second brackets 12, 13 are both annular and adhered to the edge regions of the first and second surfaces of the vibrating plate 10 via a first adhesive layer 15 and a second adhesive layer 16, respectively. The first and second brackets 12, 13 support and secure the vibrating plate 10 at its edges without affecting the vibration of the central region of the vibrating plate 10, which follows the piezoelectric plate 11. The arrangement of the first and second brackets 12, 13 ensures the stability and reliability of the sound-generating device, particularly during low-frequency vibrations, by effectively preventing excessive deformation of the vibrating plate 10.

[0038] In the sound-generating device 1 provided in the embodiment of the present application, the piezoelectric piece 11 has good high-frequency response performance, and the vibration piece 10 has good medium and low-frequency response performance. When the piezoelectric piece 11 receives a high-frequency signal, it will quickly contract and expand, thereby driving the vibration piece 10 to synchronously perform high-frequency vibrations; because the piezoelectric piece 11 is located in the central area of the vibration piece 10 and has a relatively small cross-sectional area, it can efficiently generate high-frequency vibrations. When the piezoelectric piece 11 receives a medium and low-frequency signal, it will contract and expand at a slower speed, thereby driving the vibration piece 10 to perform medium and low-frequency vibrations; at the same time, since the edge portion of the vibration piece 10 is not directly driven by the piezoelectric piece 11, it can vibrate freely, further enhancing the output effect of the medium and low frequencies.

[0039] Therefore, the vibration sound-generating assembly composed of the piezoelectric plate 11 and the vibrating plate 10 can effectively vibrate in both the high-frequency and medium-low frequency ranges, thereby ensuring that the sound-generating device 1 can take into account the low, medium and high frequency sound generation, and achieve a relatively good effect in the full frequency band of audio. When the sound-generating device 1 is applied to an electronic product, there is no need to set up a tweeter unit and a mid-bass unit separately in the electronic product, which helps to reduce the size of the electronic product and reduce the cost of the electronic product.

[0040] In one embodiment, the piezoelectric piece 11 is made of multi-layer bi-crystal ceramic.

[0041] In this specific example, piezoelectric disc 11 is made of a multilayer bimorph ceramic, which exhibits high sensitivity and excellent frequency response characteristics. Due to its greater number of interfaces and more complex structure, multilayer bimorph piezoelectric ceramics are able to respond more quickly to changes in the electric field, resulting in better performance in the high-frequency range of the sound-generating device 1 and more accurate reproduction of the high-frequency components of the audio signal. Furthermore, the multilayer structure enables the piezoelectric ceramic to produce a greater displacement when subjected to an electric field, which helps the sound-generating device 1 produce a larger amplitude and clearer sound quality in the high-frequency range.

[0042] Reference Figures 1 and 2 As shown, in one embodiment, the piezoelectric piece 11 is bonded to the first surface of the vibration piece 10 by a flexible adhesive 14 .

[0043] In this specific example, flexible glue 14 is used to bond the piezoelectric piece 11 and the first surface of the vibration piece 10. The flexible glue has good adhesion and elasticity, which can ensure a tight connection between the piezoelectric piece 11 and the vibration piece 10, while reducing energy loss during vibration and improving the vibration effect.

[0044] Optionally, the flexible glue may be polyurethane glue, acrylic glue or silicone glue.

[0045] Reference Figures 1 and 2 As shown, in one embodiment, the cross-sectional area of the piezoelectric piece 11 is 1 / 2 to 4 / 5 of the cross-sectional area of the vibration piece 10 .

[0046] If the cross-sectional area of the piezoelectric piece 11 is too small relative to the cross-sectional area of the vibration piece 10, the piezoelectric piece 11 cannot provide sufficient vibration driving force for the vibration piece 10, and the piezoelectric piece 11 cannot effectively drive the vibration piece 10 to vibrate synchronously; if the cross-sectional area of the piezoelectric piece 11 is too large relative to the cross-sectional area of the vibration piece 10, it will affect the low-frequency vibration effect of the vibration piece 10. Therefore, in this specific example, the cross-sectional area of the piezoelectric piece 11 is set to 1 / 2 to 4 / 5 of the cross-sectional area of the vibration piece 10, thereby ensuring that the piezoelectric piece 11 can fully excite the vibration piece 10 during the vibration process, while avoiding the problem that the piezoelectric piece 11 is too large and causes the low-frequency sound effect of the sound-generating device 1 to be poor.

[0047] Reference Figures 1 and 2 As shown, in one embodiment, the thickness of the vibration plate 10 is 0.03-0.2 mm.

[0048] If the vibrating plate 10 is too thick, the low-frequency vibration effect of the vibrating plate 10 will be poor. If the vibrating plate 10 is too thin, the manufacturing process of the vibrating plate 10 will be difficult and the strength of the vibrating plate 10 will be poor. Therefore, in this specific example, the thickness of the vibrating plate 10 is set to 0.03-0.2 mm, thereby achieving both the low-frequency vibration effect of the vibrating plate 10 and the stability and durability of the structure.

[0049] Reference Figures 1 and 2 As shown, in one embodiment, the thickness of the piezoelectric sheet 11 is 0.05-0.2 mm.

[0050] If the piezoelectric sheet 11 is too thin, it will be difficult for it to effectively drive the vibration sheet 10 to vibrate synchronously. If the piezoelectric sheet 11 is too thick, its high-frequency vibration effect will be affected. Therefore, in this specific example, the thickness of the piezoelectric sheet 11 is set to 0.05-0.2 mm. This ensures that the piezoelectric sheet 11 produces sufficient deformation under the stimulation of the electrical signal to effectively drive the vibration sheet 10 to vibrate, while also ensuring the high-frequency vibration effect of the piezoelectric sheet 11.

[0051] Reference Figures 1 and 2 As shown, in one embodiment, the vibration plate 10 is in the shape of a flat plate, and the width of the first bracket 12 and the width of the second bracket 13 are both 1 / 10 to 1 / 6 of the width of the vibration plate 10 .

[0052] In this specific example, the flat-plate diaphragm 10 has a simple structure and is easy to process and manufacture. Setting the width of the first bracket 12 and the width of the second bracket 13 to 1 / 10 to 1 / 6 of the width of the diaphragm 10 ensures that the first bracket 12 and the second bracket 13 provide sufficient support without significantly affecting the vibration amplitude of the diaphragm 10, thereby ensuring the sound performance and structural stability of the sound-generating device 1.

[0053] Reference Figure 3 As shown, in one embodiment, the vibration plate 10 includes a central portion 101, a folding ring portion 102 and a fixed portion 103, the folding ring portion 102 is connected to the central portion 101 and the folding ring portion 102 is arranged around the central portion 101, and the fixed portion 103 is connected to the folding ring portion 102 and the fixed portion 103 is arranged around the folding ring portion 102.

[0054] In this specific example, the vibration plate 10 including the central portion 101 , the folded ring portion 102 and the fixed portion 103 has better low-frequency vibration characteristics, thereby improving the low-frequency sound effect and sound quality of the sound-generating device 1 .

[0055] Reference Figures 2 and 3 As shown, in one embodiment, the piezoelectric sheet 11 is disposed corresponding to the central portion 101 ; the first bracket 12 and the second bracket 13 are disposed corresponding to the fixing portion 103 .

[0056] In this specific example, piezoelectric plate 11 is positioned relative to central portion 101 of vibrating plate 10, ensuring that piezoelectric plate 11 effectively excites the central region (central portion 101) of vibrating plate 10, producing high-quality vibration and sound. Furthermore, first bracket 12 and second bracket 13 are positioned relative to fixed portion 103 of vibrating plate 10, ensuring the structural stability and durability of the sound-generating device. Furthermore, first bracket 12 and second bracket 13 do not affect the vibration amplitude of vibrating plate 10.

[0057] According to another embodiment of the present application, an electronic device is provided, comprising the sound-generating device 1 as described above.

[0058] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0059] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A sound-generating device, characterized in that: The sound-generating device comprises: A vibration plate (10), the vibration plate (10) having a first surface and a second surface disposed opposite to each other; a piezoelectric sheet (11), the piezoelectric sheet (11) being adhesively connected to the first surface of the vibrating sheet (10), the cross-sectional area of the piezoelectric sheet (11) being smaller than the cross-sectional area of the vibrating sheet (10), and the piezoelectric sheet (11) being located in a central area of the first surface of the vibrating sheet (10); A first bracket (12), the first bracket (12) is annular, the first bracket (12) is bonded to an edge area of a first surface of the vibration plate (10), and the first bracket (12) is arranged around the piezoelectric plate (11); The second bracket (13) is annular and is bonded to an edge region of the second surface of the vibration plate (10).

2. The sound-generating device according to claim 1, wherein: The material of the piezoelectric piece (11) is multi-layer twin-crystal ceramic.

3. The sound-generating device according to claim 1 or 2, characterized in that: The piezoelectric plate (11) is bonded to the first surface of the vibration plate (10) via a flexible adhesive (14).

4. The sound-generating device according to claim 1 or 2, characterized in that: The cross-sectional area of the piezoelectric piece (11) is 1 / 2 to 4 / 5 of the cross-sectional area of the vibration piece (10).

5. The sound-generating device according to claim 4, characterized in that: The thickness of the vibration plate (10) is 0.03-0.2 mm.

6. The sound-generating device according to claim 4, characterized in that: The thickness of the piezoelectric sheet (11) is 0.05-0.2 mm.

7. The sound-generating device according to claim 1, characterized in that: The vibration plate (10) is in the shape of a flat plate, and the width of the first bracket (12) and the width of the second bracket (13) are both 1 / 10 to 1 / 6 of the width of the vibration plate (10).

8. The sound-generating device according to claim 1, wherein: The vibration plate (10) includes a central portion (101), a folding ring portion (102) and a fixed portion (103), wherein the folding ring portion (102) is connected to the central portion (101) and the folding ring portion (102) is arranged around the central portion (101), and the fixed portion (103) is connected to the folding ring portion (102) and the fixed portion (103) is arranged around the folding ring portion (102).

9. The sound-generating device according to claim 8, characterized in that: The piezoelectric sheet (11) is arranged corresponding to the central portion (101); and the first bracket (12) and the second bracket (13) are arranged corresponding to the fixing portion (103).

10. An electronic device, characterized in that: The electronic device comprises the sound emitting device (1) according to any one of claims 1 to 9.

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