Speaker, speaker module and electronic device

Abstract

The present invention belongs to the technical field of loudspeakers, and discloses a loudspeaker, a loudspeaker module and an electronic device, wherein the loudspeaker comprises a support frame, a diaphragm assembly, a first piezoelectric cantilever, a connector and a support member. The first piezoelectric cantilever comprises a first fixed end and a first free end, wherein the first fixed end is connected to the support frame, and the first free end is suspended on the inner side of the support frame; the first end of the connector is connected to the first free end, and the other end of the connector extends in a direction away from the first free end, and the stiffness of the connector is less than the stiffness of the first piezoelectric cantilever; the support member is connected to the connector and is used to connect to the diaphragm assembly of the loudspeaker, and the connection position between the support member and the connector is spaced apart from the connection position between the connector and the first free end. The loudspeaker, loudspeaker module and electronic device provided by the present invention have high reliability and long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of loudspeakers, and in particular to a loudspeaker, a loudspeaker module and an electronic device. Background Art

[0002] As an important electroacoustic device, speakers are widely used in electronic devices. Speakers can be divided into dynamic speakers, moving iron speakers and piezoelectric speakers according to their technical types. Compared with dynamic speakers, piezoelectric speakers have the advantages of being small, thin, light and free of magnetic field interference.

[0003] In the prior art, a piezoelectric speaker includes a piezoelectric sheet and a diaphragm stacked with the piezoelectric sheet. The piezoelectric sheet vibrates under the drive of a driving voltage, driving the diaphragm to vibrate, so as to realize the sound of the speaker. A support block is usually arranged between the piezoelectric sheet and the diaphragm. The piezoelectric sheet is a cantilever beam structure, and the support block is directly arranged at the free end of the piezoelectric sheet. Since the piezoelectric sheet usually includes a substrate and a piezoelectric driver arranged on the substrate, the stiffness of the piezoelectric sheet is relatively large. The piezoelectric sheet directly drives the diaphragm to vibrate through the support block, which is more likely to cause damage to the diaphragm, has low reliability, and has a short service life of the piezoelectric speaker.

[0004] Therefore, there is an urgent need for a speaker, a speaker module and an electronic device with high reliability. Summary of the invention

[0005] The object of the present invention is to provide a speaker, a speaker module and an electronic device with high reliability and long service life.

[0006] As conceived above, the technical solution adopted by the present invention is:

[0007] Speakers, including:

[0008] Support frame;

[0009] A diaphragm assembly, the periphery of which is fixedly connected to the support frame;

[0010] A first piezoelectric cantilever, wherein the first piezoelectric cantilever comprises a first fixed end and a first free end, wherein the first fixed end is connected to the support frame, and the first free end is suspended inside the support frame;

[0011] A connecting member, wherein a first end of the connecting member is connected to the first free end, the other end of the connecting member extends in a direction away from the first free end, and the stiffness of the connecting member is smaller than the stiffness of the first piezoelectric cantilever;

[0012] A support member is connected to the connecting member and is used to connect to the diaphragm assembly of the speaker. The connection position between the support member and the connecting member is spaced apart from the connection position between the connecting member and the first free end.

[0013] Optionally, the speaker further includes a second piezoelectric cantilever, which is disposed in the same layer as the first piezoelectric cantilever and includes a second fixed end and a second free end, the second fixed end is connected to the support frame, and the second free end is suspended inside the support frame and is spaced apart from the first free end;

[0014] The second end of the connecting member, which is arranged opposite to the first end, is connected to the second free end, and the connection position between the connecting member and the second piezoelectric cantilever is spaced from the connection position between the supporting member and the connecting member;

[0015] The stiffness of the connecting member is smaller than the stiffness of the second piezoelectric cantilever.

[0016] Optionally, the first piezoelectric cantilever and the second piezoelectric cantilever are spaced apart in a first direction, and the support member is located between the first piezoelectric cantilever and the second piezoelectric cantilever in the first direction.

[0017] Optionally, the support member is provided with a minimum distance between the support member and the first piezoelectric cantilever in the first direction being equal to the minimum distance between the support member and the second piezoelectric cantilever.

[0018] Optionally, a plurality of the support members are provided, and the plurality of the support members are spaced apart in the first direction.

[0019] Optionally, the thickness direction of the connecting member is the same as the thickness direction of the first piezoelectric cantilever, one side of the connecting member in the thickness direction is connected to the first free end, and the thickness of the connecting member is smaller than the thickness of the first piezoelectric cantilever.

[0020] Optionally, a length of the connecting member in the second direction is equal to or smaller than a length of the first piezoelectric cantilever in the second direction.

[0021] Optionally, the connecting member is connected to a surface of the first piezoelectric cantilever facing the diaphragm assembly.

[0022] Optionally, a protrusion is provided on a surface of the diaphragm assembly facing the first piezoelectric cantilever, and a avoidance structure matching the protrusion is provided on a surface of the support member facing the diaphragm assembly, and the avoidance structure is used to avoid the protrusion.

[0023] A speaker module comprises a shell and the above-mentioned speaker, wherein the shell is provided with a sound outlet hole, the sound outlet hole connects the inner space of the shell with the outer space of the shell, and the speaker is installed in the inner space of the shell.

[0024] An electronic device comprises the speaker as described above or the speaker module as described above.

[0025] Beneficial effects of the present invention:

[0026] The speaker, speaker module and electronic device provided by the present invention, the first free end of the first piezoelectric cantilever is connected to a connecting member, the stiffness of the connecting member is less than the stiffness of the first piezoelectric cantilever, the support member is connected to the connecting member, the support member is used to connect the connecting member and the diaphragm assembly of the speaker to transmit power, the connection position between the support member and the connecting member is spaced apart from the connection position between the connecting member and the first free end, so that the first free end of the first piezoelectric cantilever is not directly connected to the supporting member, but is connected to the supporting member through the connecting member, and the stiffness of the connecting member is less than the stiffness of the first piezoelectric cantilever, so that the connecting member has a certain elasticity compared with the first piezoelectric cantilever, the existence of the connecting member prevents the amplitude of the diaphragm assembly from changing drastically in a short time, and further makes it difficult for the connecting member to cause damage to the diaphragm assembly when driving the diaphragm assembly to vibrate through the support member, thereby improving the reliability of the speaker and extending the service life of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0028] Figure 1 is a schematic structural diagram of a speaker provided by an embodiment of the present invention;

[0029] Figure 2 is an exploded schematic diagram of a speaker provided by an embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of the structure of some speakers provided by an embodiment of the present invention;

[0031] Figure 4 is an exploded schematic diagram of some speakers provided by an embodiment of the present invention;

[0032] Figure 5 is an exploded schematic diagram of a first piezoelectric cantilever provided in an embodiment of the present invention;

[0033] Figure 6 is a front view of a loudspeaker provided by an embodiment of the present invention;

[0034] Figure 7 The present invention Figure 6 AA section view shown;

[0035] Figure 8 The present invention Figure 6 BB cross-sectional view shown.

[0036] In the figure:

[0037] 100, support frame; 110, frame; 120, circuit board; 200, first piezoelectric cantilever; 210, first fixed end; 220, first free end; 230, cantilever beam; 240, driver; 300, connector; 400, support member; 410, avoidance structure; 500, second piezoelectric cantilever; 510, second fixed end; 520, second free end; 600, diaphragm assembly; 610, protrusion; 620, first diaphragm assembly; 630, second diaphragm assembly;

[0038] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0039] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly stipulated and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0043] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0044] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or there may be a central element. Embodiment 1

[0045] This embodiment provides a loudspeaker that can reduce the probability of damage to the diaphragm assembly and has high reliability and long service life.

[0046] The speaker in this embodiment may be a MEMS (micro-electro-mechanical system) speaker. MEMS speakers can be widely used in current mobile electronic devices, such as mobile phones, smart wearable devices, etc., due to their advantages such as low power consumption and light weight.

[0047] In some embodiments, Figures 1 to 8 As shown, the speaker includes a supporting frame 100 , a first piezoelectric cantilever 200 , a connecting member 300 and a supporting member 400 .

[0048] Exemplarily, the support frame 100 is made of hard material, such as metal, plastic, etc.

[0049] Exemplarily, the support frame 100 is a frame structure, and the support frame 100 has a cavity (not shown in the figure) that runs through two surfaces in the thickness direction thereof. The support frame 100 can be an independent part, or the support frame 100 can also be a combined part. For example, Figure 2As shown, the support frame 100 includes a frame 110 and a circuit board 120 disposed on the frame 110. The cavity is disposed through the frame 110 and the circuit board 120. The circuit board 120 is used to be electrically connected to the first piezoelectric cantilever 200 to provide the first piezoelectric cantilever 200 with an acoustic and electrical signal.

[0050] Exemplarily, a welding pad may be provided on the circuit board 120 , and the first piezoelectric cantilever 200 is welded on the welding pad to achieve electrical connection between the two.

[0051] In some optional embodiments, one end of the first piezoelectric cantilever 200 is clamped between the circuit board 120 and the frame 110 to improve the fixing effect of the first piezoelectric cantilever 200 on the support frame 100 .

[0052] like Figure 4 As shown, the first piezoelectric cantilever 200 includes a first fixed end 210 and a first free end 220. The first fixed end 210 is connected to the support frame 100, for example, the first fixed end 210 is sandwiched between the circuit board 120 and the frame 110. The first free end 220 is suspended on the inner side of the support frame 100, for example, the first free end 220 is suspended on one side of the cavity of the support frame 100, so that the first free end 220 can vibrate in the cavity. Exemplarily, the first fixed end 210 and the first free end 220 are two opposite ends of the first piezoelectric cantilever 200.

[0053] For example, Figure 2 As shown, the first end (not shown) of the connecting member 300 is connected to the first free end 220 of the first piezoelectric cantilever 200, and the connection method between the connecting member 300 and the first free end 220 includes but is not limited to bonding, welding, etc. In addition, the stiffness of the connecting member 300 is less than the stiffness of the first piezoelectric cantilever 200.

[0054] It should be noted that stiffness refers to the ability of a material or structure to resist elastic deformation when subjected to force. The greater the stiffness of a structure, the higher the ability of the structure to resist elastic deformation when subjected to force, and the smaller the elasticity of the structure itself. In this embodiment, the stiffness of the first piezoelectric cantilever 200 is greater than the stiffness of the connecting member 300, that is, the stiffness of the first piezoelectric cantilever 200 is greater than the stiffness of the connecting member 300, so that the elasticity of the connecting member 300 is greater than the elasticity of the first piezoelectric cantilever 200.

[0055] It should also be noted that the stiffness of the connecting member 300 in the vibration direction of the first piezoelectric cantilever 200 is smaller than the stiffness of the first piezoelectric cantilever 200 in its own vibration direction. For example, the vibration direction of the first piezoelectric cantilever 200 may be the thickness direction of the first piezoelectric cantilever 200 .

[0056] Exemplarily, the material of the connector 300 includes, but is not limited to, metal materials, polymer materials, etc., as long as the best performance can be achieved. For example, the material of the connector 300 is polyimide (PI).

[0057] For example, Figure 3 As shown, the support member 400 is connected to the connecting member 300, that is, the support member 400 is not directly connected to the first piezoelectric cantilever 200, but is connected to the connecting member 300. The support member 400 is used to connect to the diaphragm assembly 600 of the speaker to transmit vibration to the diaphragm assembly 600, and can also support the connecting member 300, thereby supporting the first piezoelectric cantilever 200.

[0058] For example, the support member 400 is made of hard materials, such as metal, plastic, etc., so that the transmission of power and motion is efficient and accurate. The support member 400 can be made of light materials, such as light metal, etc., to reduce transmission resistance and improve the sensitivity of power and motion transmission.

[0059] In this embodiment, the connection position between the support member 400 and the connecting member 300 is spaced from the connection position between the connecting member 300 and the first free end 220, that is, the connection position between the connecting member 300 and the first piezoelectric cantilever 200 is different from the connection position between the connecting member 300 and the support member 400. The connection position between the support member 400 and the connecting member 300 is named as the first connection position, and the connection position between the connecting member 300 and the first free end 220 is named as the second connection position. There is a certain distance between the first connection position and the second connection position, for example, there is a section of the connecting member 300 between the first connection position and the second connection position.

[0060] In the speaker provided in the present embodiment, the first free end 220 of the first piezoelectric cantilever 200 is connected to a connecting member 300, the stiffness of the connecting member 300 is smaller than the stiffness of the first piezoelectric cantilever 200, the supporting member 400 is connected to the connecting member 300, the supporting member 400 is used to connect the connecting member 300 and the diaphragm assembly 600 of the speaker to transmit power, and the connecting position of the supporting member 400 and the connecting member 300 is spaced from the connecting position of the connecting member 300 and the first free end 220, so that the first free end 220 of the first piezoelectric cantilever 200 does not directly contact the supporting member 400. The first piezoelectric cantilever 200 is not connected to the support member 400, but is connected to the support member 400 through the connecting member 300, and the stiffness of the connecting member 300 is less than the stiffness of the first piezoelectric cantilever 200, so that the connecting member 300 has a certain elasticity compared with the first piezoelectric cantilever 200. The existence of the connecting member 300 prevents the amplitude of the diaphragm assembly 600 from changing drastically in a short time, and further makes it difficult for the diaphragm assembly 600 to be damaged when the connecting member 300 drives the diaphragm assembly 600 to vibrate through the support member 400, thereby improving the reliability of the speaker and extending the service life of the speaker.

[0061] In some optional embodiments, the other end of the connecting member 300 extends in a direction away from the first free end 220, that is, the connecting member 300 has a portion located outside the first piezoelectric cantilever 200. The supporting member 400 can be connected to the portion of the connecting member 300 located outside the first piezoelectric cantilever 200, so that the distance between the supporting member 400 and the first free end 220 can be large, thereby making full use of the elasticity of the connecting member 300.

[0062] In other optional embodiments, the connecting member 300 includes a portion located above or below the first free end 220 and arranged opposite to the first free end 220. For example, the connecting member 300 is L-shaped, and the supporting member 400 can be connected to the portion of the connecting member 300 arranged opposite to the first free end 220. When the first free end 220 vibrates, the driving force can be transmitted to the connecting member 300 and the supporting member 400 in sequence.

[0063] Alternatively, if Figure 2 As shown, the speaker further includes a second piezoelectric cantilever 500. The second piezoelectric cantilever 500 is arranged in the same layer as the first piezoelectric cantilever 200. For example, the minimum distance between the second piezoelectric cantilever 500 and the diaphragm assembly 600 is equal to the minimum distance between the first piezoelectric cantilever 200 and the diaphragm assembly 600. By providing the second piezoelectric cantilever 500, the driving area of ​​the diaphragm assembly 600 is increased, thereby improving the sensitivity of the speaker and enhancing the acoustic performance of the speaker.

[0064] For example, the second piezoelectric cantilever 500 is identical or similar to the first piezoelectric cantilever 200 so as to balance the weight of each area of ​​the speaker.

[0065] In some optional embodiments, the first piezoelectric cantilever 200 and the second piezoelectric cantilever 500 are symmetrically arranged, thereby reducing the overall vibration amplitude of the speaker and improving the vibration stability of the speaker.

[0066] For example, Figure 4 As shown, the second piezoelectric cantilever 500 includes a second fixed end 510 and a second free end 520. Exemplarily, the second fixed end 510 and the second free end 520 are two opposite ends of the second piezoelectric cantilever 500. The second fixed end 510 is connected to the support frame 100, and the second free end 520 is suspended on the inner side of the support frame 100. Exemplarily, the second free end 520 is suspended on one side of the cavity of the support frame 100, so that the second free end 520 can have enough vibration space.

[0067] In this embodiment, the second free end 520 is spaced apart from the first free end 220 to prevent the first free end 220 and the second free end 520 from interfering with each other during vibration, thereby improving feasibility.

[0068] It should be noted that the vibration direction of the first free end 220 and the second free end 520 is the same, that is, the first free end 220 and the second free end 520 move synchronously and in the same direction, so that the first free end 220 and the second free end 520 can drive the connecting member 300 to move closer to or away from the diaphragm assembly 600, and then drive the diaphragm assembly 600 to move through the supporting member 400.

[0069] For example, Figure 3 As shown, the second end (not shown in the figure) of the connecting member 300, which is arranged opposite to the first end, is connected to the second free end 520. By connecting the first end and the second end of the connecting member 300 to the first free end 220 and the second free end 520 respectively, the length of the connecting member 300 can be shorter, and thus the weight of the speaker can be smaller.

[0070] Optionally, the connection position between the connecting member 300 and the second piezoelectric cantilever 500 is spaced apart from the connection position between the supporting member 400 and the connecting member 300, so that there is a section of connecting member 300 between the connection position between the connecting member 300 and the second piezoelectric cantilever 500 and the connection position between the supporting member 400 and the connecting member 300. The second piezoelectric cantilever 500 is not directly connected to the supporting member 400, but is connected to the supporting member 400 through the connecting member 300, and the force of the second free end 520 is transmitted to the diaphragm assembly 600 through the connecting member 300 and the supporting member 400.

[0071] Optionally, the stiffness of the connecting member 300 is less than the stiffness of the second piezoelectric cantilever 500. When the second free end 520 drives the connecting member 300 to vibrate, the connecting member 300 drives the diaphragm assembly 600 to vibrate through the supporting member 400, thereby reducing the probability of damage to the diaphragm assembly 600 due to drastic changes and further improving reliability.

[0072] Alternatively, if Figure 2 or Figure 8 As shown, the first piezoelectric cantilever 200 and the second piezoelectric cantilever 500 are spaced apart in the first direction X, and the support member 400 is located between the first piezoelectric cantilever 200 and the second piezoelectric cantilever 500 in the first direction X, so that the support member 400 can be far away from the connection position between the connecting member 300 and the first free end 220 and the connection position between the connecting member 300 and the second free end 520, thereby making full use of the elasticity of the connecting member 300.

[0073] Of course, it is understandable that the first piezoelectric cantilever 200 and the second piezoelectric cantilever 500 may not be arranged at intervals in the first direction X, but may have staggered portions in the second direction Y. For example, the first free end 220 and the second free end 520 are arranged at intervals in the second direction Y, so that the first piezoelectric cantilever 200 and the second piezoelectric cantilever 500 can be both longer, which can improve the low-frequency sensitivity of the speaker and further enhance the acoustic performance of the speaker.

[0074] The second direction Y is perpendicular to the first direction X. Exemplarily, the first direction X is the length direction of the speaker, and the second direction Y is the width direction of the speaker.

[0075] In some optional embodiments, such as Figure 4 As shown, the support member 400 is provided with one. In the first direction X, the minimum distance between the support member 400 and the first piezoelectric cantilever 200 is equal to the minimum distance between the support member 400 and the second piezoelectric cantilever 500, that is, the support member 400 is located between the first piezoelectric cantilever 200 and the second piezoelectric cantilever 500, so that the driving force of the first free end 220 and the second free end 520 is transmitted to the support member 400 at the same time, thereby improving the effect of driving the diaphragm assembly 600 to vibrate.

[0076] In some other optional embodiments, a plurality of support members 400 may be provided, and the plurality of support members 400 are spaced apart in the first direction X. By providing a plurality of support members 400 , the diaphragm assembly 600 may have a plurality of driving points, further ensuring the driving effect of the diaphragm assembly 600 .

[0077] Exemplarily, in the first direction X, multiple support members 400 can be located between the first piezoelectric cantilever 200 and the second piezoelectric cantilever 500, that is, the orthographic projection of the support member 400 on the plane where the first piezoelectric cantilever 200 and the second piezoelectric cantilever 500 are located does not overlap with the first piezoelectric cantilever 200 and the second piezoelectric cantilever 500, so as to fully utilize the elasticity of the connecting member 300.

[0078] As another example, in the first direction X, the plurality of support members 400 may also include a support member 400 located above or below the first piezoelectric cantilever 200 and / or the second piezoelectric cantilever 500, and the support member 400 is separated from the first piezoelectric cantilever 200 and the second piezoelectric cantilever 500 by the connecting member 300 so as to be able to fully utilize the elasticity of the connecting member 300.

[0079] In some optional embodiments, two support members 400 are provided, one support member 400 is arranged near the first free end 220 in the first direction X, and the other support member 400 is arranged near the second free end 520 in the first direction X. The distance between one support member 400 and the edge of the first free end 220 facing the second free end 520 is equal to the distance between the other support member 400 and the edge of the second free end 520 facing the first free end 220, so that the two support members 400 can vibrate synchronously and in the same direction, thereby ensuring the reliability of driving the diaphragm assembly 600.

[0080] For example, Figure 3As shown, the thickness direction of the connecting member 300 is the same as the thickness direction of the first piezoelectric cantilever 200 . For example, the connecting member 300 and the first piezoelectric cantilever 200 are both plate-shaped, and the connecting member 300 is arranged parallel to the first piezoelectric cantilever 200 .

[0081] In this embodiment, one side of the connecting member 300 in the thickness direction is connected to the first free end 220 , so that the connecting member 300 and the first free end 220 have a larger connection area to improve the connection reliability between the two.

[0082] Furthermore, the thickness of the connecting member 300 is less than that of the first piezoelectric cantilever 200, which can improve the elasticity of the connecting member 300 on the one hand, and is conducive to the lightweight and miniaturization of the speaker on the other hand. It should be noted that the thickness of the first piezoelectric cantilever 200 is equal to the thickness of the second piezoelectric cantilever 500. It should also be noted that the first piezoelectric cantilever 200 and the second piezoelectric cantilever 500 are both equal thickness structures to facilitate vibration control.

[0083] For example, Figure 2 As shown, the length of the connecting member 300 in the second direction Y (i.e., the width of the connecting member 300) is less than or equal to the length of the first piezoelectric cantilever 200 in the second direction Y (i.e., the width of the first piezoelectric cantilever 200), so that the connecting member 300 does not have a portion extending out of the first piezoelectric cantilever 200 in the second direction Y, thereby reducing energy loss. It should be noted that the connecting member 300 and the first piezoelectric cantilever 200 are both equal-width structures with relatively regular shapes, which facilitates vibration control.

[0084] Similarly, the length of the connecting member 300 in the second direction Y is less than or equal to the length of the second piezoelectric cantilever 500 in the second direction Y.

[0085] Exemplarily, the length of the support member 400 in the second direction Y is less than or equal to the length of the connecting member 300 in the second direction Y, which is not limited in this embodiment. Figure 2 As shown, the length of the support member 400 in the second direction Y is less than the length of the connecting member 300 in the second direction Y. However, the length of the support member 400 should not be too small, as this will affect the effect and accuracy of driving force transmission.

[0086] Alternatively, if Figure 2As shown, when the speaker also includes a diaphragm assembly 600, the diaphragm assembly 600 is arranged on one side of the first piezoelectric cantilever 200 in the thickness direction, specifically on the side of the first piezoelectric cantilever 200 facing away from the cavity, and the connecting member 300 is connected to the surface of the first piezoelectric cantilever 200 facing the diaphragm assembly 600. Since the connecting member 300 has a large amplitude when moving toward the diaphragm assembly 600, the connecting member 300 is arranged to be connected to the surface of the first piezoelectric cantilever 200 facing the diaphragm assembly 600. This can reduce the probability of failure of the connection between the connecting member 300 and the first piezoelectric cantilever 200 and improve the connection stability.

[0087] Similarly, the connecting member 300 is connected to the surface of the second piezoelectric cantilever 500 facing the diaphragm assembly 600 to reduce the probability of failure in the connection between the connecting member 300 and the second piezoelectric cantilever 500 .

[0088] For example, Figure 7 As shown, a protrusion 610 is provided on the surface of the diaphragm assembly 600 facing the first piezoelectric cantilever 200, and an avoidance structure 410 matching the protrusion 610 is provided on the surface of the support member 400 facing the diaphragm assembly 600. The avoidance structure 410 is used to avoid the protrusion 610 to prevent the support member 400 from colliding with the diaphragm assembly 600 when moving, thereby further improving the reliability of the speaker.

[0089] For example, the diaphragm assembly 600 includes a diaphragm (not shown in the figure), and the protrusion 610 is an annular protruding structure on the diaphragm.

[0090] As another example, the avoidance structure 410 may be an avoidance groove, an avoidance opening, an avoidance slope, etc., which is not limited in this embodiment. Figure 4 As shown, the avoidance structure 410 in this embodiment is a avoidance slope, and the space above the avoidance slope can be used to accommodate the protrusion 610.

[0091] It should be noted that when the protrusion 610 is an annular protruding structure, two avoidance structures 410 are correspondingly provided.

[0092] Alternatively, if Figure 5As shown, the first piezoelectric cantilever 200 (or the second piezoelectric cantilever 500) may include a driver 240 and a cantilever beam 230, one end of the cantilever beam 230 is connected to the support frame 100, the other end of the cantilever beam 230 is suspended inside the support frame 100, and the other end of the cantilever beam 230 is a free end. The driver 240 is connected to the cantilever beam 230. The driver 240 may be formed above and / or below the cantilever beam 230. In addition, the area of ​​the driver 240 may be equal to the area of ​​the cantilever beam 230, or may be smaller than the area of ​​the cantilever beam 230. The driver 240 may drive the cantilever beam 230 to vibrate along the thickness direction of the first piezoelectric cantilever 200. By way of example, the driver 240 may be any one of a piezoelectric driver, an electrostatic driver, an electromagnetic driver, and a thermoelectric driver.

[0093] In some other optional embodiments, such as Figure 7 and Figure 8 As shown, two diaphragm assemblies 600 are provided, that is, the speaker in this embodiment is a dual-diaphragm speaker. The two diaphragm assemblies 600 are relatively arranged on the opposite side surfaces of the support frame 100. Correspondingly, two first piezoelectric cantilevers 200, connectors 300 and supports 400 are provided in a one-to-one correspondence with the two diaphragm assemblies 600, that is, the two first piezoelectric cantilevers 200 are connected to the two connectors 300 in a one-to-one correspondence, the two connectors 300 are connected to the two supports 400 in a one-to-one correspondence, and the two supports 400 are connected to the two diaphragm assemblies 600 in a one-to-one correspondence, thereby realizing the driving of the two diaphragm assemblies 600, and also improving the reliability of the dual-diaphragm speaker and extending the service life.

[0094] Exemplarily, the two diaphragm assemblies 600 are respectively a first diaphragm assembly 620 and a second diaphragm assembly 630. One support member 400 is connected to the first diaphragm assembly 620, and the other support member 400 is connected to the second diaphragm assembly 630.

[0095] For example, Figure 8 As shown, the dual-diaphragm loudspeaker in this embodiment is a symmetrical structure. Figure 8 As shown, the upper and lower directions are symmetrically arranged, and the vibration directions of the first diaphragm assembly 620 and the second diaphragm assembly 630 are opposite. When vibrating in opposite directions, the vibrations will cancel each other out, achieving a better shock-absorbing effect and providing a better user experience.

[0096] In this embodiment, two second piezoelectric cantilevers 500 are also provided, and the two second piezoelectric cantilevers 500 are connected to the two connecting members 300 in a one-to-one correspondence, so as to increase the driving area of ​​the two diaphragm assemblies 600, improve the sensitivity of the speaker, and enhance the acoustic performance of the speaker.

[0097] In this embodiment, two first piezoelectric cantilevers 200 are arranged in upper and lower layers, two second piezoelectric cantilevers 500 are arranged in upper and lower layers, and the first piezoelectric cantilever 200 and the second piezoelectric cantilever 500 corresponding to one diaphragm assembly 600 are arranged in the same layer.

[0098] This embodiment further provides a speaker module, comprising a housing (not shown in the figure) and the speaker as described above. The speaker module provided by this embodiment has high reliability.

[0099] The shell is provided with a sound outlet hole (not shown in the figure), the sound outlet hole connects the internal space of the shell with the external space of the shell, and the speaker is installed in the internal space of the shell.

[0100] This embodiment further provides an electronic device, comprising the above-mentioned speaker or the above-mentioned speaker module. The electronic device provided by this embodiment has high reliability.

[0101] The electronic device may include a mobile phone, a tablet personal computer, a laptop, a personal digital assistant (PDA), a camera, a personal computer, a laptop, a vehicle-mounted device, a wearable device, augmented reality (AR) glasses, AR helmets, virtual reality (VR) glasses, VR helmets, fixed-line handsets (pickups), medical auxiliary equipment (such as hearing aids), various headphones (such as wireless headphones or wired headphones), and other devices with speakers. The embodiments of the present application do not impose any special restrictions on the specific forms of the above-mentioned electronic devices.

[0102] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. Speaker, It is characterized in that include: Support frame (100); A diaphragm assembly (600), the periphery of which is fixedly connected to the support frame (100); A first piezoelectric cantilever (200), the first piezoelectric cantilever (200) comprising a first fixed end (210) and a first free end (220), the first fixed end (210) being connected to the support frame (100), and the first free end (220) being suspended on the inner side of the support frame (100); A connecting member (300), wherein a first end of the connecting member (300) is connected to the first free end (220), the other end of the connecting member (300) extends in a direction away from the first free end (220), the rigidity of the connecting member (300) is smaller than the rigidity of the first piezoelectric cantilever (200), and one side of the connecting member (300) in a thickness direction is connected to the first free end (220); a supporting member (400) connected to the connecting member (300) and connected to the diaphragm assembly (600), wherein a connection position between the supporting member (400) and the connecting member (300) is spaced from a connection position between the connecting member (300) and the first free end (220); The loudspeaker further comprises a second piezoelectric cantilever (500), the second piezoelectric cantilever (500) being arranged in the same layer as the first piezoelectric cantilever (200), and comprising a second fixed end (510) and a second free end (520), the second fixed end (510) being connected to the support frame (100), and the second free end (520) being suspended on the inner side of the support frame (100) and spaced apart from the first free end (220); The second end of the connecting member (300) disposed opposite to the first end is connected to the second free end (520), and the connection position between the connecting member (300) and the second piezoelectric cantilever (500) is spaced from the connection position between the supporting member (400) and the connecting member (300); The stiffness of the connecting member (300) is smaller than the stiffness of the second piezoelectric cantilever (500); The first free end (220) and the second free end (520) have the same vibration direction.

2. The loudspeaker according to claim 1, It is characterized in that The first piezoelectric cantilever (200) and the second piezoelectric cantilever (500) are arranged at intervals in a first direction (X), and the support member (400) is located between the first piezoelectric cantilever (200) and the second piezoelectric cantilever (500) in the first direction (X).

3. The loudspeaker according to claim 2, It is characterized in that The support member (400) is provided with a minimum distance between the support member (400) and the first piezoelectric cantilever (200) in the first direction (X) equal to the minimum distance between the support member (400) and the second piezoelectric cantilever (500).

4. The loudspeaker according to claim 2, It is characterized in that A plurality of the support members (400) are provided, and the plurality of the support members (400) are arranged at intervals in the first direction (X).

5. The loudspeaker according to any one of claims 1 to 4, It is characterized in that The thickness direction of the connecting member (300) is the same as the thickness direction of the first piezoelectric cantilever (200), and the thickness of the connecting member (300) is smaller than the thickness of the first piezoelectric cantilever (200).

6. The loudspeaker according to any one of claims 1 to 4, It is characterized in that The length of the connecting member (300) in the second direction (Y) is equal to or less than the length of the first piezoelectric cantilever (200) in the second direction (Y).

7. The loudspeaker according to any one of claims 1 to 4, It is characterized in that A protrusion (610) is provided on the surface of the diaphragm assembly (600) facing the first piezoelectric cantilever (200), and a avoidance structure (410) matching the protrusion (610) is provided on the surface of the support member (400) facing the diaphragm assembly (600), and the avoidance structure (410) is used to avoid the protrusion (610).

8. Speaker module, It is characterized in that It comprises a shell and a speaker as described in any one of claims 1 to 7, wherein the shell is provided with a sound outlet hole, the sound outlet hole connects the internal space of the shell with the external space of the shell, and the speaker is installed in the internal space of the shell.

9. Electronic equipment, It is characterized in that It comprises the speaker as described in any one of claims 1 to 7 or the speaker module as described in claim 8.

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