Sound production monomer and electronic equipment

Abstract

The invention discloses a sound production monomer and electronic equipment. The sound production monomer comprises a piezoelectric structure layer, an amplitude amplification mechanism and a vibrating diaphragm; the amplitude amplification mechanism is connected to the piezoelectric structure layer, and the vibrating diaphragm is connected to the amplitude amplification mechanism; the piezoelectric structure layer can form transverse vibration under the condition of electrification, and the amplitude amplification mechanism can convert and amplify the transverse vibration into longitudinal vibration of the vibrating diaphragm. The sound production monomer provided by the invention has better high-frequency quality, can avoid external electromagnetic signal interference, and improves the sound production performance.

Description

Technical Field

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

[0002] The traditional magnetic power voice coil drives the speaker unit at high frequencies, due to the split vibration of the dome at the center, resulting in obvious high-frequency attenuation, and the magnetic field of the magnet will be disturbed by external electromagnetic signals, causing the sound of the speaker unit to be distorted. Summary of the invention

[0003] One purpose of the present application is to provide a new technical solution for a sound unit and an electronic device.

[0004] According to a first aspect of the present application, a sound-emitting unit is provided, comprising:

[0005] Piezoelectric structural layer, amplitude amplification mechanism and diaphragm;

[0006] The amplitude amplification mechanism is connected to the piezoelectric structure layer, and the diaphragm is connected to the amplitude amplification mechanism;

[0007] The piezoelectric structure layer can generate transverse vibration when powered, and the amplitude amplification mechanism can convert and amplify the transverse vibration into longitudinal vibration of the diaphragm.

[0008] Optionally, the amplitude amplification mechanism comprises: a first structural member, a second structural member and a tweeter driving structure, wherein the first structural member and the second structural member are both bowl-shaped structures and are respectively buckled on the upper and lower sides of the piezoelectric structural layer;

[0009] The edge of the first structural member is connected to the piezoelectric structural layer to form a first set angle, and the edge of the second structural member is connected to the piezoelectric structural layer to form a second set angle;

[0010] The diaphragm and the tweeter driving structure are both connected to the first structural member or the second structural member, and the tweeter driving structure can amplify the amplitude of the first structural member or the second structural member.

[0011] Optionally, the first set angle and the second set angle are respectively in the range of 5° to 25°.

[0012] Optionally, the diaphragm is connected to the first structural member, a sunken annular platform is formed at the center of the first structural member, and the tweeter drive structure is arranged on the annular platform to amplify the amplitude of the first structural member.

[0013] Optionally, the tweeter driving structure includes a tweeter vibration plate and a tweeter driving component, the periphery of the tweeter vibration plate is fixed on the annular platform, and the tweeter driving component is attached to a side surface of the tweeter vibration plate.

[0014] Optionally, the tweeter vibration plate is made of metal material, and a thickness ratio of the tweeter vibration plate to the tweeter driving component is 1:5 to 1:1.

[0015] Optionally, the tweeter driver is fixed to a side of the tweeter vibration plate close to the piezoelectric structure layer.

[0016] Optionally, a gap is provided between an edge of the tweeter driver and an edge of the annular platform.

[0017] Optionally, the first structural member and / or the second structural member are respectively configured as a plurality of split structures divided along the edge toward the center.

[0018] According to a second aspect of the present application, an electronic device is provided, comprising the sound-emitting unit described in the first aspect.

[0019] According to one embodiment of the present application, a piezoelectric structure layer and an amplitude amplification mechanism and a diaphragm connected to the piezoelectric structure layer are provided, so that the amplitude generated when the piezoelectric structure layer is energized is converted and amplified into a longitudinal vibration of the amplitude, thereby improving the high-frequency sound quality, being unaffected by external electromagnetic signals, and improving the sound performance of the sound unit.

[0020] 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

[0021] 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.

[0022] Figure 1 It is a structural schematic diagram of a sound-generating unit provided in this application.

[0023] Figure 2 yes Figure 1 AA section view.

[0024] Figure 3 yes Figure 1 Top view of the .

[0025] Figure 4 yes Figure 3 BB cross-sectional view.

[0026] Figure 5 yes Figure 1 Bottom view of .

[0027] Figure 6 yes Figure 1 Side view of.

[0028] Description of reference numerals:

[0029] 1. Piezoelectric structural layer; 2. Amplitude amplification mechanism; 21. First structural member; 22. Second structural member; 23. Treble vibration plate; 24. Treble driving member; 25. Ring platform; 3. Diaphragm;

[0030] a, gap; α, first set angle; β, second set angle. DETAILED DESCRIPTION

[0031] 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 arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0032] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0033] 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 as part of the specification.

[0034] 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.

[0035] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] like Figures 1 to 6 As shown, according to the first aspect of the present application, a sound-emitting unit is provided, comprising: a piezoelectric structure layer 1, an amplitude amplification mechanism 2 and a diaphragm 3; the amplitude amplification mechanism 2 is connected to the piezoelectric structure layer 1, and the diaphragm 3 is connected to the amplitude amplification mechanism 2; the piezoelectric structure layer 1 can form lateral vibration when energized, and the amplitude amplification mechanism 2 can convert and amplify the lateral vibration into longitudinal vibration of the diaphragm 3.

[0037] Specifically, in this embodiment, the sound-generating unit can be arranged in electronic devices such as mobile phones, computers, and tablets for use as a speaker, and its piezoelectric structure layer 1 can be connected to the mainboard of the electronic device through a flexible circuit board or a wire, etc., to form a transverse vibration of the piezoelectric structure layer 1. Furthermore, the amplitude amplification mechanism 2 is connected to the piezoelectric structure layer 1, and the diaphragm 3 is connected to the amplitude amplification mechanism 2, so that when the piezoelectric structure layer 1 vibrates transversely, the transverse vibration is converted and amplified into a longitudinal vibration and transmitted to the diaphragm 3, thereby causing the diaphragm 3 to achieve longitudinal vibration, so as to achieve the purpose of the sound-generating unit converting the current signal into a sound signal.

[0038] In the above structure, the piezoelectric structure layer 1 is usually made of piezoelectric materials, such as ceramics, etc., and the inverse piezoelectric effect is used to enable the piezoelectric structure layer 1 to undergo lateral deformation (expansion or contraction) when powered, thereby forming lateral vibration. The lateral direction refers to the direction parallel to the piezoelectric structure layer 1. Furthermore, this lateral vibration can be converted into the longitudinal vibration of the diaphragm 3 after conversion and amplification by the amplitude amplification mechanism 2, which means that the diaphragm 3 can vibrate in a direction perpendicular to the piezoelectric structure layer 1 under the longitudinal vibration of the amplitude amplification mechanism 2, so as to achieve the purpose of the diaphragm 3 driving the air to vibrate and produce sound.

[0039] After the amplitude amplification mechanism 2 amplifies the amplitude of the lateral vibration and converts it into longitudinal vibration, the driving effect of the treble compensation will become more and more obvious when the sound is in the high frequency band, compensating for the weak acoustic performance of the mid-bass at high frequencies, so that the sound-emitting unit of the present application can reduce its high-frequency sound pressure level and achieve the purpose of improving the high-frequency sound quality. Among them, the amplitude amplification mechanism 2 can be implemented by a structural member of a set shape, such as a bowl-shaped structure, etc., which can be specifically designed according to actual needs, and the present application does not limit this.

[0040] Compared with some high-frequency compensation methods using circuit amplification systems in the prior art, the mechanical compensation method provided by the present application is more reliable and can simplify the entire circuit structure, thereby achieving the effect of miniaturizing the sound-generating unit structure, making it applicable to a variety of electronic devices. In addition, in the above structure, compared with the traditional electromagnetic voice coil-driven speaker, the sound-generating unit provided by the present application does not involve magnetic components such as magnets, which can avoid interference from external electromagnetic signals, thereby avoiding distortion of the sound of the sound-generating unit, further improving the sound quality of the sound-generating unit, and improving its sound performance.

[0041] Alternatively, if Figures 2 to 6As shown, the amplitude amplification mechanism 2 includes: a first structural member 21, a second structural member 22 and a tweeter drive structure. The first structural member 21 and the second structural member 22 are both bowl-shaped structures and are respectively buckled on the upper and lower sides of the piezoelectric structure layer 1; the edge of the first structural member 21 is connected to the piezoelectric structure layer 1 to form a first set angle α, the edge of the second structural member 22 is connected to the piezoelectric structure layer 1 to form a second set angle β, the diaphragm 3 and the tweeter drive structure are both connected to the first structural member 21 or the second structural member 22, and the tweeter drive structure can amplify the amplitude of the first structural member 21 or the second structural member 22.

[0042] Specifically, in this embodiment, the first structural member 21 and the second structural member 22 are respectively designed to be buckled on the upper and lower sides of the piezoelectric structural layer 1 in a bowl-like manner, so that the first structural member 21 and the second structural member 22 respectively form a vibration cavity with the upper and lower sides of the piezoelectric structural layer 1 to accommodate the longitudinal vibration of the first structural member 21 and the second structural member 22, thereby achieving the purpose of converting the lateral vibration of the piezoelectric structural layer 1 into the longitudinal vibration, so as to drive the diaphragm 3 connected to the first structural member 21 or the second structural member 22 to form a longitudinal vibration perpendicular to the piezoelectric structural layer 1. Among them, the edge of the first structural member 21 and the edge of the piezoelectric structural layer 1, and the edge of the second structural member 22 and the edge of the piezoelectric structural layer 1 can be connected by glue. At this time, the edge of the first structural member 21 and the edge of the second structural member 22 can be designed with an annular connection plane to improve the reliability of the connection.

[0043] Furthermore, in this embodiment, a tweeter drive structure is fixed on the first structural member 21 connected to the diaphragm 3 or the second structural member 22 connected to the diaphragm 3 to amplify the amplitude on the corresponding first structural member 21 or the second structural member 22, so that the longitudinal vibration of the diaphragm 3 can be amplified by several orders of magnitude compared to the amplitude of the micron-level lateral vibration generated by the piezoelectric structural layer 1, so as to achieve compensation for the treble in the high frequency band and improve the high frequency quality. Among them, the first structural member 21 and the second structural member 22 can be made of metal or other low-damping materials to effectively reduce energy loss and maximize the energy of the tweeter drive structure, and the tweeter drive structure can be made of a heavier mass block or other structure or material with amplified amplitude, which is not limited in this application.

[0044] In the above structure, the first structural member 21 forms a first set angle α with the piezoelectric structural layer 1, and the second structural member 22 forms a second set angle β with the piezoelectric structural layer 1. The smaller the angle between each structural layer and the piezoelectric structural layer 1, the stronger the amplitude amplification effect. Therefore, the amplification effect of the amplitude amplification structure can be controlled by adjusting the size of the first set angle α and / or the second set angle β. However, the smaller the angle between each structural layer and the piezoelectric structural layer 1, the greater the difficulty of the connection process between the two. Therefore, it is necessary to control the size of the first set angle α and / or the second set angle β within an appropriate range.

[0045] Alternatively, if Figure 4 As shown, the first set angle α and the second set angle β are in the range of 5° to 25° respectively.

[0046] In practical applications, the range of the first set angle α and the second set angle β can be respectively 5° to 25°, so that the amplification effect of the amplitude amplification mechanism 2 is obvious, and the difficulty of bonding it to the piezoelectric structure layer 1 is not too great, so as to take into account the sound performance and manufacturing cost of the sound-emitting unit. Among them, the degrees of the first set angle and the second set angle can be the same or different, and can be adapted according to the specific structure of the sound-emitting unit or the structure of the electronic device used in it. Preferably, the first set angle α and the second set angle β are 10°, 15° or 20°. In addition, when the diaphragm 3 is connected to the first structural member 21 or the second structural member 22, the other one can be used for fixed connection with an external device to improve the reliability of the connection between the sound-emitting unit and the external device.

[0047] Alternatively, if Figure 2 and Figure 4 As shown, the diaphragm 3 is connected to the first structural member 21 ; a sunken annular platform 25 is formed at the center of the first structural member 21 , and a tweeter driving structure is arranged on the annular platform 25 for amplifying the amplitude of the first structural member 21 .

[0048] Specifically, in this embodiment, a sunken annular platform 25 is provided on the first structural member 21 connected to the diaphragm 3, that is, a certain range is hollowed out in the central area of ​​the first structural member 21, and its edge protrudes toward the direction of the piezoelectric structural layer 1 to form an annular platform 25 so as to facilitate the connection of the tweeter drive structure to the first structural member 21, while reducing the occupied space when the sound-emitting unit vibrates, and further realizing the miniaturization of the device. Among them, the tweeter drive structure is only provided on the first structural member 21 connected to the diaphragm 3, so that the second structural member 22 can not only help to amplify the amplitude, but also be fixedly connected to the external device through its bottom wall, thereby improving the connection reliability between the sound-emitting unit and other devices.

[0049] Alternatively, if Figure 2 and Figure 4As shown, the tweeter driving structure includes a tweeter vibration plate 23 and a tweeter driving member 24 ; the periphery of the tweeter vibration plate 23 is fixed on the annular platform 25 , and the tweeter driving member 24 is attached to one side surface of the tweeter vibration plate 23 .

[0050] Specifically, in this embodiment, the tweeter vibration plate 23 can be made of low-damping and low-cost metal materials or polymer materials such as steel sheets, and the tweeter driver 24 can be made of single crystal or double crystal ceramic materials. The periphery of the tweeter vibration plate 23 is fixed on the annular platform 25 to achieve connection with the first structural member 21, and the tweeter driver 24 can be fixed on a side surface of the center position of the tweeter vibration plate 23. When the first structural member 21 vibrates, the tweeter driver structure can form a bending vibration state to drive the air to vibrate, achieving an amplitude amplification effect of an order of magnitude.

[0051] Optionally, refer to Figure 4 The thickness ratio of the tweeter vibration plate 23 to the tweeter driving member 24 is 1:5 to 1:1.

[0052] Specifically, in the above embodiment, the tweeter driver 24 can be designed to have the same structural form as the tweeter vibration member, for example, both are designed to be circular, and the thickness ratio of the tweeter vibration plate 23 to the tweeter driver 24 is 1:5 to 1:1, so as to take into account the vibration amplification performance and structural reliability of the tweeter drive structure. Among them, the tweeter vibration plate 23 and the tweeter driver 24 can be connected to each other by soft glue to transfer the energy of the ceramic bending vibration to the tweeter vibration plate 23 to provide high-frequency sound compensation. Preferably, the thickness ratio of the tweeter vibration plate 23 to the tweeter driver 24 is 1:2.

[0053] Alternatively, if Figure 2 and Figure 4 As shown, the tweeter driver 24 is fixed on the tweeter vibration plate 23 at one side close to the piezoelectric structure layer 1, which can effectively prevent the intrusion of external water and dust and achieve a better waterproof effect.

[0054] Alternatively, if Figure 4 As shown, a gap a is provided between the edge of the tweeter driver 24 and the edge of the annular platform 25 .

[0055] Specifically, in the present embodiment, a gap a is provided between the edge of the tweeter driver 24 and the edge of the annular platform 25, that is, the size of the tweeter driver 24 is usually designed to be smaller than that of the tweeter vibration plate 23, so that when it is pasted on the tweeter vibration plate 23, there can be a certain gap a between it and the edge of the annular platform 25, so as to reserve space for vibration deformation of the tweeter driver 24 and improve the reliability of amplitude amplification.

[0056] Optionally, the first structural member 21 and / or the second structural member 22 are respectively configured as a plurality of split structures divided along the edge toward the center.

[0057] Specifically, in this embodiment, the first structural member 21 and / or the second structural member 22 are respectively designed as segmented parts, which can reduce the overall stiffness of the first structural member 21 and / or the second structural member 22 and effectively exert the driving performance of the tweeter driver 24.

[0058] According to a second aspect of the present application, an electronic device is provided, comprising the sound-emitting unit of the first aspect.

[0059] Specifically, in practical applications, most electronic devices need to have a sound-generating function. When the sound-generating unit provided in the first aspect of the present application is applied to an electronic device, the high-frequency quality of the sound generated by the sound is improved, and the sound distortion caused by the interference of electromagnetic signals is avoided, thereby improving the sound-generating performance of the entire electronic device. The electronic device may be a mobile phone, a computer, or a tablet, etc., and the present application does not limit this.

[0060] 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.

[0061] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting 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-emitting unit, characterized in that: include: Piezoelectric structural layer, amplitude amplification mechanism and diaphragm; The amplitude amplification mechanism is connected to the piezoelectric structure layer, and the diaphragm is connected to the amplitude amplification mechanism; The piezoelectric structure layer can generate transverse vibration when powered, and the amplitude amplification mechanism can convert and amplify the transverse vibration into longitudinal vibration of the diaphragm.

2. The sound-emitting unit according to claim 1, characterized in that: The amplitude amplification mechanism comprises: a first structural member, a second structural member and a tweeter driving structure, wherein the first structural member and the second structural member are both bowl-shaped structures and are respectively buckled on the upper and lower sides of the piezoelectric structural layer; The edge of the first structural member is connected to the piezoelectric structural layer to form a first set angle, and the edge of the second structural member is connected to the piezoelectric structural layer to form a second set angle; The diaphragm and the tweeter driving structure are both connected to the first structural member or the second structural member, and the tweeter driving structure can amplify the amplitude of the first structural member or the second structural member.

3. The sound-emitting unit according to claim 2, characterized in that: The first set angle and the second set angle are in the range of 5° to 25° respectively.

4. The sound-emitting unit according to claim 2, characterized in that: The diaphragm is connected to the first structural member, a sunken annular platform is formed at the center of the first structural member, and the tweeter driving structure is arranged on the annular platform to amplify the amplitude of the first structural member.

5. The sound-emitting unit according to claim 4, characterized in that: The tweeter driving structure comprises a tweeter vibration plate and a tweeter driving member. The periphery of the tweeter vibration plate is fixed on the annular platform, and the tweeter driving member is attached to a side surface of the tweeter vibration plate.

6. The sound-emitting unit according to claim 5, characterized in that: The thickness ratio of the tweeter vibration plate to the tweeter driving member is 1:5 to 1:

1.

7. The sound-emitting unit according to claim 5, characterized in that: The tweeter driving component is fixed on a side of the tweeter vibration plate close to the piezoelectric structure layer.

8. The sound-emitting unit according to claim 5, characterized in that: A gap is arranged between the edge of the tweeter driver and the edge of the annular platform.

9. The sound-emitting unit according to claim 2, characterized in that: The first structural member and / or the second structural member are respectively configured as a plurality of split structures divided along the edge toward the center.

10. An electronic device, characterized in that: It comprises the sound-emitting unit described in any one of claims 1 to 9.

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