Speaker

Abstract

The present invention provides a speaker, which includes a housing, a main speaker and an auxiliary speaker. An installation cavity is formed in the housing, at least part of the cavity wall of the installation cavity is a concave arc surface, and sound holes communicating with the outside and the installation cavity are formed on the concave arc surface; the main speaker is arranged in the installation cavity, the main speaker covers the concave arc surface, and the front cavity of the main speaker is formed by enclosing with the concave arc surface; the auxiliary speaker is arranged in the front cavity and is spaced from the first diaphragm of the main speaker, and the auxiliary speaker is used for emitting medium and high audio frequencies. The technical solution of this application can improve the richness and analytical restoration degree of the sound quality of the speaker, and enhance the user's auditory experience.

Description

Technical Field

[0001] The present invention relates to the technical field of audio devices, and particularly to a speaker. Background Art

[0002] With the development of smart speakers, more and more speaker structures in the shape of a sphere or a hemisphere have emerged on the market. For speakers of this shape, the space between the speaker and the inner wall of the sphere is relatively large, resulting in the fact that audio in the medium and high frequency bands is prone to generating standing waves between the speaker diaphragm and the inner wall of the sphere, causing the medium and high frequency sensitivity of the speaker to rapidly decay, resulting in partial medium and high frequency loss in the played sound, poor richness and resolution of the speaker's sound quality, and poor sound quality, which affects the user experience. Summary of the Invention

[0003] The main object of the present invention is to provide a speaker, aiming to improve the richness and resolution of the speaker's sound quality and enhance the user's sound quality experience.

[0004] To achieve the above object, a speaker proposed by the present invention includes:

[0005] A housing, an installation cavity is formed inside the housing, at least part of the cavity wall of the installation cavity is a concave arc surface, and sound holes communicating the outside with the installation cavity are opened on the concave arc surface;

[0006] A main speaker, the main speaker is arranged in the installation cavity, the main speaker covers the concave arc surface, and forms a front cavity of the main speaker with the concave arc surface; and

[0007] An auxiliary speaker, the auxiliary speaker is arranged in the front cavity and is spaced apart from the first diaphragm of the main speaker, and the auxiliary speaker is used for emitting medium and high frequency audio.

[0008] In an embodiment of the speaker of the present invention, the auxiliary speaker is a piezoelectric speaker.

[0009] In an embodiment of the speaker of the present invention, through holes are opened on the second diaphragm of the piezoelectric speaker, and the through holes are arranged corresponding to the first diaphragm of the main speaker.

[0010] In an embodiment of the speaker of the present invention, the piezoelectric speaker further includes a mounting frame, the mounting frame is provided with a hollow hole, and the second diaphragm is embedded in the hollow hole and is arranged opposite to the first diaphragm.

[0011] In an embodiment of the speaker of the present invention, the second diaphragm covers the surface of the mounting frame facing the main speaker, and the cross-sectional area of the hollow hole gradually expands in a direction away from the main speaker.

[0012] In an embodiment of the speaker of the present invention, the second diaphragm includes a vibrating piece and a piezoelectric piece. The vibrating piece covers one side surface of the mounting frame, and the piezoelectric pieces are stacked on one side surface of the vibrating piece. The piezoelectric speaker further includes a conductive member, and the piezoelectric piece is electrically connected to the main board of the speaker through the conductive member.

[0013] In an embodiment of the speaker of the present invention, the mounting frame is provided with a limiting groove, and one end of the conductive member is arranged in the limiting groove and electrically connected to the piezoelectric piece;

[0014] And / or, a plurality of piezoelectric pieces are provided, and the plurality of piezoelectric pieces are stacked on the surface of the vibrating piece.

[0015] In an embodiment of the speaker of the present invention, the main board of the speaker is located below the main speaker, and a wiring terminal is provided at the bottom of the main speaker, and the wiring terminal is in contact with the output terminal on the main board.

[0016] In an embodiment of the speaker of the present invention, the auxiliary speaker has a conductive member, and the conductive member extends along the outer wall of the main speaker to the main board and is electrically connected to the main board;

[0017] And / or, the input end of the auxiliary speaker is electrically connected to the wiring terminal of the main speaker.

[0018] In an embodiment of the speaker of the present invention, a shock isolation pad is provided between the main speaker and the cavity wall of the installation cavity, and the shock isolation pad is arranged to surround the circumference of the front cavity;

[0019] And / or, the auxiliary speaker is fixedly connected to the housing;

[0020] And / or, the speaker further includes a mesh cloth, and the mesh cloth covers the outside of the housing.

[0021] The technical solution of the present invention is to provide a main speaker and an auxiliary speaker in the speaker. The main speaker can emit sounds of the full audio range, and the auxiliary speaker can emit medium and high-frequency sounds. At the same time, the auxiliary speaker is located in the front cavity formed by the enclosure of the arc-shaped cavity wall of the main speaker and the installation cavity, and is spaced from the first diaphragm of the main speaker. In this way, the setting of the auxiliary speaker will not affect the vibration and sound emission of the first diaphragm, and thus will not affect the outward radiation of the low-frequency sound with weak directivity; it can also reduce the size of the front cavity of the main speaker, effectively alleviating the sound cancellation phenomenon caused by the multiple reflections of the medium and high-frequency sound waves with shorter wavelengths emitted by the main speaker in the front cavity; at the same time, the medium and high-frequency sounds emitted by the auxiliary speaker can make up for the medium and high-frequency sounds lost by the main speaker due to the front cavity effect, playing a role of superposition and compensation of medium and high-frequency sounds, so that the sound played by the speaker includes all frequency bands of medium, high and low, ensuring the sound analysis and restoration degree and the richness of the sound quality of the speaker.

[0022] Meanwhile, since the mid-high frequency sounds can be superimposed and compensated by the auxiliary speaker to ensure the playback effect of mid-high frequency sounds, the main speaker can then be more inclined to play low-frequency sounds at this time, further improving the low-frequency effect of the speaker, better restoring the sound, and improving the sound quality of the speaker. That is to say, the technical solution of the present invention can better improve the playback effect of the speaker in the mid-high frequency band, enhance the richness of the mid-high frequency, make the sound field of the speaker wider, and at the same time improve the clarity of the sound quality, thereby improving the richness and analytical restoration degree of the sound quality of the speaker and enhancing the user's auditory experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0024] Figure 1 Structural diagram of an embodiment of the speaker of the present invention;

[0025] Figure 2 is Figure 1 Cross-sectional view of the speaker in

[0026] Figure 3 is Figure 1 Exploded view of the speaker in

[0027] Figure 4 Structural diagram of another embodiment of the speaker of the present invention;

[0028] Figure 5 Structural diagram of the speaker of the present invention with the housing removed;

[0029] Figure 6 is Figure 5 Structural diagram of the main speaker in the speaker;

[0030] Figure 7 is Figure 6 Exploded view of the main speaker of

[0031] Figure 8 is Figure 5 Structural diagram of the auxiliary speaker in the speaker;

[0032] Figure 9 is Figure 8 Exploded view of the auxiliary speaker of

[0033] Figure 10 is Figure 8 Exploded view of the auxiliary speaker with the conductive parts removed of

[0034] Figure 11 This is the audio simulation diagram of the speaker of the present invention.

[0035] Explanation of the reference numerals in the attached drawings:

[0036] Label Name Label Name 100 Speaker 25 Front cavity 10 Housing 27 Terminal 11 Front shell 29 Vibration isolation pad 111 Sound hole 30 Auxiliary speaker 13 Rear shell 31 Mounting frame 15 Mounting cavity 311 Hollow hole 17 Charging interface 313 Limit groove 19 Button 315 Glue groove 20 Main speaker 33 Second diaphragm 21 Inner housing 331 Vibrating piece 211 Sound cavity 333 Piezoelectric element 23 Speaker unit 335 Through hole 231 First diaphragm 35 Conductive part 233 Basket 40 Main board 235 Pressure relief hole 41 Output terminal 237 Connection terminal 50 Mesh cloth

[0037] The realization of the object of the present invention, its functional features and advantages will be further described in conjunction with the embodiments and with reference to the attached drawings. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0039] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0040] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] In view of the problems raised in the background art, a speaker 100 proposed by the present invention can improve the richness of sound quality and the degree of resolution and restoration of the speaker 100, thereby enhancing the user's auditory experience.

[0043] The structure of the speaker 100 of the present application will be described in detail in the following specific embodiments.

[0044] Please refer to Figures 1 to 3 , in an embodiment of the speaker 100 of the present invention, the speaker 100 includes:

[0045] A housing 10, an installation cavity 15 is formed inside the housing 10, at least part of the cavity wall of the installation cavity 15 is a concave arc surface, and a sound hole 111 communicating with the outside and the installation cavity 15 is provided on the concave arc surface;

[0046] A main speaker 20, the main speaker 20 is disposed in the installation cavity 15, the main speaker 20 covers the concave arc surface, and forms a front cavity 25 of the main speaker 20 with the concave arc surface; and

[0047] An auxiliary speaker 30, the auxiliary speaker 30 is disposed in the front cavity 25 and is spaced from the first diaphragm 23 of the main speaker 20, and the auxiliary speaker 30 is used to emit medium and high audio frequencies.

[0048] Specifically, the speaker 100 proposed in the present application includes a housing 10 as an installation base. An installation cavity 15 is formed inside the housing 10 to accommodate components such as a main speaker 20, a main board 40, and a secondary speaker 30. Taking the main speaker 20 as a reference system, a partial cavity wall of the installation cavity 15 covered by the main speaker 20 is a concave arc surface, and a sound hole 111 communicating with the installation cavity 15 is formed on the concave arc surface. The main speaker 20 is mostly a full-range speaker, which can be a dynamic speaker, an electro-acoustic transducer applying the electric principle. The main speaker 20 is covered on the concave arc surface to enclose a front cavity 25 of the main speaker 20 with the concave arc surface. When the main speaker 20 receives an electrical signal from the main board 40 and makes the first diaphragm 231 vibrate to generate sound, the sound emitted can be radiated outward through the sound hole 111. The secondary speaker 30 can emit medium and high-frequency tones. It can be a thermoacoustic speaker, that is, it uses a thermoacoustic membrane to generate sound. Specifically, when the thermoacoustic membrane heats up, it can heat the air around the thermoacoustic membrane, causing the air to vibrate and generate sound, and the sound frequency band it emits can reach the medium and high-frequency bands; alternatively, the secondary speaker 30 can also be a piezoelectric speaker as described in the following embodiments, where the vibration piece 331 is driven to vibrate by the deformation of the piezoelectric material in the change of the electric field, causing the air to vibrate and generate sound, and the sound frequency band it emits can reach the medium and high-frequency bands. The secondary speaker 30 is located in the front cavity 25 of the main speaker 20 and is spaced from the first diaphragm 23 of the main speaker 20. Since the directivity of the low-frequency sound emitted by the main speaker 20 is relatively low, the low-frequency sound can be transmitted from the gap between the secondary speaker 30 and the first diaphragm 231 to the gap between the secondary speaker 30 and the concave arc surface, and then radiated outward through the sound hole 111, so as to avoid the influence of the setting of the secondary speaker 30 on the propagation of low-frequency sound waves and ensure the low-frequency effect of the speaker 100; at the same time, the setting of the secondary speaker 30 reduces the size of the front cavity 25, thereby reducing the number of reflections of the medium and high-frequency sound emitted by the main speaker 20 in the front cavity 25, and thus reducing the cancellation loss of the sound emitted by the main speaker 20 in the front cavity 25; at the same time, the medium and high-frequency sound emitted by the secondary speaker 30 can be superimposed on the sound emitted by the main speaker 20 to compensate for the medium and high-frequency loss caused by the front cavity 25 effect of the main speaker 20, so that the sound played by the speaker 100 includes all frequency bands of low, medium, and high, ensuring the sound analysis and restoration degree and sound quality richness of the speaker 100. On the other hand, since the speaker 100 mainly emits medium and high-frequency sounds from the secondary speaker 30 at this time, the main speaker 20 can be mainly used for low-frequency sounds, so as to improve the low-frequency sound effect of the speaker 100, thereby optimizing the low-frequency sound effect while improving the playback effect and richness of the medium and high-frequency bands of the speaker 100, further improving the sound quality richness and analysis and restoration degree of the speaker 100, and enhancing the user's auditory experience.

[0049] In addition, in some embodiments, a thermoacoustic device or a piezoelectric speaker is used as the auxiliary speaker 30, and its sound frequency range can extend from 400 Hz to 40 kHz. Although the sound frequencies that the human body can perceive are only in the range of 20 Hz to 20 kHz, the sounds in daily life are all composed of a fundamental frequency and overtones, that is, the sound itself includes sounds that people can hear and sounds that people cannot hear. If only the auxiliary speaker 30 emits sounds within the audible audio range of the human body and does not include sounds of other frequencies, the waveform of the sound will change, resulting in audio distortion and poor audio restoration. In this application, the combination of the main speaker 20 and the auxiliary speaker 30 is adopted, so that the sound range emitted by the speaker 100 is between 0 and 40 kHz, which can make the speaker 100 have a high audio restoration degree, make the sound it emits closer to the original sound, and enable users to have a better auditory experience.

[0050] It should be noted that the technical solution proposed in this application can be used to improve the problem of mid-high frequency attenuation caused by the front cavity effect due to the over-large front cavity of the speaker caused by the structural characteristics of the concave arc surface. At this time, the problem mentioned above will occur as long as the cavity wall covered by the main speaker 20 is a concave arc surface. The structure of the cavity wall outside the main speaker 20 is not limited. It can all be a concave arc surface, or it can be set accordingly according to the internal component structure layout. At the same time, the external shape of the housing 10 can be spherical, square, cylindrical, hemispherical or other shape structures, which are not limited here.

[0051] Therefore, it can be understood that in the technical solution of the present invention, by arranging the main speaker 20 and the auxiliary speaker 30 in the speaker 100, the main speaker 20 can emit sounds of the full audio range, and the auxiliary speaker 30 can emit mid-high frequency sounds. At the same time, the auxiliary speaker 30 is located in the front cavity 25 formed by the enclosure of the main speaker 20 and the arc-shaped cavity wall of the installation cavity 15, and is spaced from the first diaphragm 23 of the main speaker 20. Such an arrangement enables the setting of the auxiliary speaker 30 not to affect the vibration and sound emission of the first diaphragm 23, and thus does not affect the outward radiation of the low-frequency sound with weak directivity; it can also reduce the size of the front cavity 25 of the main speaker 20, effectively alleviating the sound cancellation phenomenon caused by the multiple reflections of the mid-high frequency sound waves with shorter wavelengths emitted by the main speaker 20 in the front cavity 25; at the same time, the mid-high frequency sounds emitted by the auxiliary speaker 30 can make up for the mid-high frequency sounds lost by the main speaker 20 due to the front cavity 25 effect, playing a role of superposition and compensation of mid-high frequency sounds, so that the sound played by the speaker 100 includes all frequency bands of mid, low and high, ensuring the sound analysis and restoration degree and the richness of the sound quality of the speaker 100.

[0052] Figure 11This is an audio comparison diagram of the speaker 100 of the present application and a conventional speaker without a secondary speaker 30. It can be seen that the speaker without the secondary speaker 30 has an obvious lack of audio in the mid-high frequency band, while the speaker of the present application is provided with the secondary speaker 30, which better solves this problem, enabling the sound played by the speaker 100 to include all frequency bands of low, mid and high, and ensuring the sound analysis and restoration degree and sound quality richness of the speaker 100.

[0053] At the same time, since the mid-high frequency sound can be superimposed and compensated by the secondary speaker 30 to ensure the playback effect of the mid-high frequency sound, the main speaker 20 can then be more biased towards playing low-frequency sounds, further enhancing the low-frequency effect of the speaker 100, better restoring the sound, and improving the sound quality of the speaker 100. That is to say, the technical solution of the present invention, by arranging the secondary speaker 30 in the front cavity 25 of the main speaker 20, can better improve the playback effect of the speaker 100 in the mid-high frequency band, enhance the mid-high frequency richness, make the sound field of the speaker 100 more open, and at the same time enhance the clarity of the sound quality, thereby improving the sound quality richness and analysis and restoration degree of the speaker 100 and enhancing the user's auditory experience.

[0054] Please refer to Figure 3 , in some embodiments of the speaker 100 of the present invention, the housing 10 of the speaker 100 includes a front shell 11 and a rear shell 13. The front shell 11 and the rear shell 13 are covered with each other to form the aforementioned installation cavity 15. The front shell 11 and the rear shell 13 are detachably connected, facilitating the disassembly and assembly of the internal components of the speaker 100.

[0055] Please refer to Figure 3 , in some embodiments of the speaker 100 of the present invention, the secondary speaker 30 is a piezoelectric speaker.

[0056] In this embodiment, the auxiliary speaker 30 is a piezoelectric speaker. The second diaphragm 33 of the piezoelectric speaker includes a vibrating piece 331 and a piezoelectric piece 333. The vibrating piece 331 can be, but is not limited to, a metal sheet, a piezoelectric ceramic sheet, a film material, etc., which is not limited herein. When it vibrates, it will drive the air to vibrate and generate sound. The piezoelectric piece 333 is a sheet-like structure made of a piezoelectric material, which can be materials such as piezoelectric ceramics and polyvinylidene fluoride. It is attached to one side surface of the vibrating piece 331 and electrically connected to the main board 40 of the speaker 100 to receive the electrical signal output by the main board 40, so that the electric field around the piezoelectric piece 333 changes to drive the piezoelectric piece 333 to deform. At this time, the piezoelectric piece 333 will expand or contract under the action of the electric field, thereby driving the vibrating piece 331 to vibrate and generate sound. For example, when the piezoelectric piece 333 is stacked on the side surface of the vibrating piece 331 facing away from the main speaker 20, if the piezoelectric piece 333 expands, the vibrating piece 331 bends away from the main speaker 20, and if the piezoelectric piece 333 contracts, the vibrating piece 331 will bend towards the main speaker 20. Thus, by simply changing the electric field of the piezoelectric piece 333 frequently, the piezoelectric piece 333 can drive the vibrating piece 331 to vibrate reciprocally to generate sound.

[0057] It should be noted that in this embodiment, the edge of the second diaphragm 33 of the piezoelectric speaker can be directly connected to the inner wall of the housing 10 or the chassis 233 of the main speaker 20, or the second diaphragm 33 can be installed on the mounting frame 31 and then fixedly connected to the housing 10 or the main speaker 20 as in the following embodiment.

[0058] With reference to Figure 5 and Figure 8 , in some embodiments of the speaker 100 of the present invention, the second diaphragm 33 of the piezoelectric speaker is provided with a through hole 335, and the through hole 335 is arranged corresponding to the first diaphragm 231 of the main speaker 20.

[0059] In this embodiment, the first diaphragm 231 of the main speaker 20 is generally in an inverted conical structure, including a central part disposed opposite to the second diaphragm 33 of the piezoelectric speaker and an edge part disposed around the central part in a conical surface. It can be understood that in the main speaker 20, the voice coil is connected to the edge of the central part, and the central part is closer to the voice coil. Due to the partition vibration effect, at this time, the central part tends to emit medium and high audio frequencies when vibrating, while the edge part tends to emit low-frequency sound waves when vibrating. The medium and high audio frequency sounds emitted by the central part will converge in the middle of the front of the main speaker 20. At this time, by opening a through hole 335 in the second diaphragm 33 of the piezoelectric speaker, the medium and high audio frequency sounds of the main speaker 20 can pass through the through hole 335 and radiate outwards from the sound emitting hole 111, avoiding the medium and high audio frequency sounds of the main speaker 20 being blocked by the second diaphragm 33 and reflected and cancelled each other, and at the same time making the medium and high audio frequencies of the main speaker 20 more concentrated and emitted outwards; at this time, the medium and high frequency sounds emitted by the piezoelectric speaker can coincide with the medium and high frequency sounds emitted by the main speaker 20, further enhancing the medium and high frequency sound quality of the speaker 100. The low-frequency sounds emitted by the edge part have low directivity, so they can be transmitted from the gap between the edge part and the piezoelectric speaker to the outside through the sound emitting hole 111 between the piezoelectric speaker and the concave arc surface, ensuring that the propagation of the low-frequency sound waves of the main speaker 20 is not interfered by the piezoelectric speaker, so that the full-frequency sound waves emitted by the main speaker 20 can be better radiated outwards, ensuring the sound analysis and restoration degree and sound quality richness of the speaker 100.

[0060] With reference to Figure 5 、 Figure 8 and Figure 9 In some embodiments of the speaker 100 of the present invention, the piezoelectric speaker further includes a mounting frame 31, the mounting frame 31 is provided with a hollow hole 311, and the second diaphragm 33 is embedded in the hollow hole 311 and disposed opposite to the first diaphragm 231.

[0061] In this embodiment, the piezoelectric speaker further includes a mounting frame 31. The mounting frame 31 provides a mounting basis for the mounting of the second diaphragm 33. The second diaphragm 33 is embedded in the hollow hole 311 of the mounting frame 31. The hollow hole 311 is used to avoid interfering with the second diaphragm 33 when the second diaphragm 33 vibrates. With such a setting, the piezoelectric speaker can be assembled first and then the mounting frame 31 can be fixedly connected to the housing 10 or the main speaker 20, improving the installation convenience of the internal structure of the speaker 100.

[0062] Please refer to Figure 5 In some embodiments of the speaker 100 of the present invention, the second diaphragm 33 covers the surface of the mounting frame 31 facing the main speaker 20, and the cross-sectional area of the hollow hole 311 gradually expands in a direction away from the main speaker 20.

[0063] In this embodiment, the second diaphragm 33 covers the surface of the mounting frame 31 facing the main speaker 20. With this arrangement, in some embodiments, when the mounting frame 31 is fixed to the cavity wall of the mounting cavity 15, it is avoided that the second diaphragm 33 is clamped between the cavity wall of the mounting cavity 15 and the mounting frame 31, which may affect the vibration of the second diaphragm 33. At the same time, in this embodiment, the cross-sectional area of the hollow holes 311 on the mounting frame 31 gradually expands in the direction away from the main speaker 20, that is, the mounting frame 31 is similar to a horn or trumpet-shaped structure. The mounting frame 31 can play the role of a loudspeaker to a certain extent. The second diaphragm 31 vibrates and emits sound on the side of the mounting frame 31 close to the main speaker 20. The sound pressure of the sound emitted by the second diaphragm 33 is increased through the hollow holes 311, and the clarity of the sound is improved. In some embodiments, through holes 335 for the mid-high frequency sound of the speaker to pass through are formed on the second diaphragm 33. At this time, the horn-shaped structure of the mounting frame 31 can also play a role in amplifying the mid-high frequency sound of the main speaker 20.

[0064] Please refer to Figure 9 and Figure 10 , in some embodiments of the speaker 100 of the present invention, the first diaphragm 231 includes a vibrating piece 331 and a piezoelectric piece 333. The vibrating piece 331 covers one side surface of the mounting frame 31, and the piezoelectric piece 333 is stacked on one side surface of the vibrating piece 331. The piezoelectric speaker further includes a conductive member 35, and the piezoelectric piece 333 is electrically connected to the main board 40 of the speaker 100 through the conductive member 35.

[0065] In this embodiment, the second diaphragm 33 of the piezoelectric speaker includes a vibrating piece 331 and a piezoelectric piece 333. The vibrating piece 331 can be, but is not limited to, a metal sheet, a piezoelectric ceramic sheet, a film material, etc., which is not limited herein. When it vibrates, it will drive the air to vibrate and emit sound. The piezoelectric piece 333 is a sheet-like structure made of a piezoelectric material, which can be a piezoelectric ceramic, a polyvinylidene fluoride, etc. It is attached to one side surface of the vibrating piece 331 and is electrically connected to the main board 40 of the speaker 100 to receive the electrical signal output by the main board 40, so that the electric field around the piezoelectric piece 333 changes, driving the piezoelectric piece 333 to deform. At this time, the piezoelectric piece 333 will expand or contract under the action of the electric field, thereby driving the vibrating piece 331 to vibrate and emit sound. For example, when the piezoelectric piece 333 is stacked on the side surface of the vibrating piece 331 facing away from the main speaker 20, if the piezoelectric piece 333 expands, the vibrating piece 331 bends away from the speaker, and if the piezoelectric piece 333 contracts, the vibrating piece 331 will bend towards the speaker side. In this way, only by frequently changing the electric field of the piezoelectric piece 333, the piezoelectric piece 333 can drive the vibrating piece 331 to vibrate back and forth to emit sound.

[0066] In some embodiments of the speaker 100 of the present invention, the diaphragm 331 is connected to the mounting frame 31 by an adhesive.

[0067] In this embodiment, when the diaphragm 331 covers the hollow hole 311 of the mounting frame 31, it is bonded to the mounting frame 31 by an adhesive. The connection structure is simple and convenient for assembly.

[0068] Please refer to Figure 10 , in some embodiments of the speaker 100 of the present invention, a glue groove 315 is formed on the surface of the mounting frame 31 facing the diaphragm 331. The glue groove 315 extends along the circumference of the hollow hole 311, and the adhesive is disposed in the glue groove 315.

[0069] In this embodiment, a glue groove 315 for filling the adhesive is formed on the surface of the mounting frame 31 facing the diaphragm 331. With such a setting, when bonding the diaphragm 331 to the mounting frame 31, the adhesive can be first injected into the glue groove 315. The setting of the glue groove 315 can prevent the adhesive from flowing to other positions and affecting the bonding of the diaphragm 331. If the adhesive flows to the middle of the diaphragm 331, it will also affect the vibration ability of the diaphragm 331 and the electro-acoustic conversion characteristics.

[0070] Further refer to Figure 8 and Figure 9 , in some embodiments of the speaker 100 of the present invention, the mounting frame 31 is provided with a limiting groove 313, and one end of the conductive member 35 is disposed in the limiting groove 313 and electrically connected to the piezoelectric sheet 333.

[0071] In this embodiment, the piezoelectric sheet 333 of the second diaphragm 33 is attached to the surface of the diaphragm 331 facing the hollow hole 311 and is located within the hollow hole 311. At the same time, a limiting groove 313 is formed on the mounting frame 31. The limiting groove 313 communicates with the hollow hole 311, so that one end of the conductive member 35 is limited in the limiting groove 313 and electrically connected to the piezoelectric sheet 333. The setting of the limiting groove 313 can limit the conductive member 35 and improve the position stability of the conductive member 35 and the connection stability between the conductive member 35 and the piezoelectric sheet 333.

[0072] In some embodiments of the speaker 100 of the present invention, a plurality of piezoelectric sheets 333 are provided, and the plurality of piezoelectric sheets 333 are stacked on the surface of the diaphragm 331.

[0073] In this embodiment, the second diaphragm 33 includes a plurality of piezoelectric sheets 333. The plurality of piezoelectric sheets 333 are stacked on the surface of the vibrating sheet 331. The arrangement of the plurality of piezoelectric sheets 333 can improve the rigidity of the vibrating sheet 331, improve the low-frequency performance of the piezoelectric speaker, reduce distortion, and make the sound quality effect of the piezoelectric speaker better. It should be noted that in this embodiment, the plurality of piezoelectric sheets 333 can be arranged on the same side surface of the vibrating sheet 331, or can be separately arranged on different surfaces of the vibrating sheet 331. When the plurality of piezoelectric sheets 333 are separately arranged on different surfaces of the vibrating sheet 331, it is only necessary to make the electric fields of the piezoelectric sheets 333 on both surfaces opposite, and no limitation is made here.

[0074] Please refer to Figure 6 and Figure 7 , in some embodiments of the speaker 100 of the present invention, the main speaker 20 includes:

[0075] An inner shell 21, a sound cavity 211 is formed inside the inner shell 21, and the inner shell 21 is provided with an installation opening communicating with the sound cavity 211; and

[0076] A speaker unit 23, the speaker unit 23 is installed in the installation opening to close the sound cavity 211. The speaker unit 23 covers the concave arc surface and encloses a front cavity 25 of the main speaker 20 with the concave arc surface. The chassis 233 of the speaker unit 23 is located inside the sound cavity 211 and is provided with a pressure relief hole 235 communicating with the sound cavity 211.

[0077] In this embodiment, the main speaker 20 includes an inner shell 21 and a speaker unit 23. The inner shell 21 is fixed in the installation cavity 15 and fixedly connected to the housing 10. A sound cavity 211 is formed inside the inner shell 21. The inner shell 21 is provided with an installation opening communicating with the sound cavity 211. The installation opening is used to install and fix the speaker unit 23. The speaker unit 23 generally includes components such as a chassis 233, a first diaphragm 231, a voice coil, a magnet, a surround, and a dust cap, and is generally a moving coil speaker. The speaker unit 23 is installed on the installation opening of the inner shell 21, and the chassis 233 of the speaker unit 23 is located inside the sound cavity 211 and is provided with a pressure relief hole 235 communicating with the sound cavity 211. With such an arrangement, the rear sound cavity 211 of the speaker unit 23 can be increased through the sound cavity 211 of the inner shell 21, the low-frequency sound effect of the speaker unit 23 can be improved, the low-frequency sound effect can be made more mellow and full, the reduction degree of the low-frequency sound effect can be improved, and thus the sound quality of the speaker 100 can be improved.

[0078] Furthermore, when the sound cavity 211 is completely enclosed, the main speaker 20 forms a structure similar to that of the closed speaker box 100. When the speaker body is powered on to vibrate the first diaphragm 231 to generate sound, the pressure change in the sound cavity 211 can drive the first diaphragm 231 to quickly reset to respond to the continuously changing electrical signal. For example, when the first diaphragm 231 moves towards the sound cavity 211 side, the pressure in the sound cavity 211 increases, thereby generating a repulsive force on the first diaphragm 231, driving the first diaphragm 231 to quickly move outwards and reset. When the first diaphragm 231 moves towards the outside of the sound cavity 211, the pressure in the sound cavity 211 decreases, thereby generating an attractive force on the first diaphragm 231, driving the first diaphragm 231 to quickly move inwards and reset. At this time, the first diaphragm 231 can quickly respond to subsequent electrical signals to vibrate according to the subsequent electrical signals, improving the instantaneous characteristics of the main speaker 20.

[0079] Please refer to Figure 2 and Figure 5 , in some embodiments of the speaker box 100 of the present invention, the main board 40 of the speaker box 100 is located below the main speaker 20, and a wiring terminal 27 is provided at the bottom of the main speaker 20, and the wiring terminal 27 is in contact with the output terminal 41 on the main board 40.

[0080] In this embodiment, when the speaker box 100 is in the upright state, the main board 40 is located below the main speaker 20, and an output terminal 41 is provided on one side plate of the main board 40 facing the main speaker 20. At this time, the wiring terminal 27 of the main speaker 20 is located at the bottom of the main speaker 20 and abuts against the output terminal 41 to form an electrical connection. In this way, it is convenient for the assembly of the speaker box 100, and no other wires are required to connect the main speaker 20 and the main board 40.

[0081] In some embodiments, the main speaker 20 includes an inner shell 21 and a speaker unit 23. At this time, the speaker unit 23 has a connection terminal 237, the connection terminal 237 is located in the sound cavity 211, a wiring terminal 27 is provided at the bottom of the inner shell 21, the wiring terminal 27 penetrates through the bottom wall of the inner shell 21, and the connection terminal 237 is electrically connected to one end of the wiring terminal 27 located in the sound cavity 211. At this time, one end of the wiring terminal 27 located outside the inner shell 21 abuts against the output terminal 41 to form an electrical connection.

[0082] In some embodiments, the output terminal 41 on the main board 40 is an elastic terminal. When the main speaker 20 is pressed down, the output terminal 41 generates elastic deformation, thereby having an elastic force opposite to the applied pressure to ensure a stable electrical connection relationship between the output terminal 41 and the wiring terminal 27.

[0083] Please refer to Figure 5, in some embodiments of the speaker 100 of the present invention, the auxiliary speaker 30 has a conductive member 35, and the conductive member 35 extends along the outer wall of the main speaker 20 to the main board 40 and is electrically connected to the main board 40.

[0084] It can be understood that the auxiliary speaker 30 is located at the sound emitting end of the main speaker 20, and the auxiliary speaker 30 also needs to be electrically connected to the main board 40 to receive the electrical signal of the main board 40 for electro-acoustic conversion and sound emission. In some embodiments, the main speaker 20 includes an inner shell 21 and a speaker unit 23. At this time, the conductive member 35 on the auxiliary speaker 30 extends along the outer wall of the inner shell 21 to the main board 40 and is electrically connected to the main board 40. Compared with the conductive member 35 passing through the sound cavity 211 of the inner shell 21 and then connecting to the main board 40, the conductive member 35 located outside the sound cavity 211 can avoid damaging the sealing performance of the sound cavity 211, thereby ensuring that the main speaker 20 has better low-frequency sound effects, and there is no need to set an additional sealing structure to block the gap between the conductive member 35 and the inner shell 21, improving the design and installation convenience. In this embodiment, the conductive member 35 can be a wire or a flexible circuit board, which is not limited herein.

[0085] Please refer to Figure 5 , in some embodiments of the speaker 100 of the present invention, the input end of the auxiliary speaker 30 is electrically connected to the wiring terminal 27 of the main speaker 20.

[0086] In this embodiment, the input end of the auxiliary speaker 30 is connected to the wiring terminal 27 of the main speaker 20 through the conductive member 35 and then electrically connected to the main board 40; specifically, in order to form a complete circuit, the positive and negative poles for electrical connection are provided on the auxiliary speaker 30 to form the input end, and the wiring terminal 27 on the main speaker 20 also includes positive and negative terminals. The positive and negative poles of the auxiliary speaker 30 are electrically connected to the positive and negative terminals on the main speaker 20 through the conductive member 35 respectively, and then electrically connected to the main board 40 at the same time, so that the main board 40 sends the same electrical signal to the main speaker 20 and the auxiliary speaker 30 at the same time, ensuring that the mid-high frequencies reproduced by the auxiliary speaker 30 are in the same phase as the mid-high frequencies reproduced by the main speaker 20, effectively improving the mid-high frequency stacking effect of the auxiliary speaker 30 and the main speaker 20, and improving the sound quality of the speaker 100.

[0087] In some embodiments, a button 19 is provided on the housing 10 of the speaker 100, and the button 19 is electrically connected to the main board 40 of the speaker 100. At this time, the user can input a control instruction by operating the button 19 to control the speaker 100 to perform corresponding actions according to the instruction, including adjusting the volume or switching audio, etc.

[0088] Please refer to Figure 5, in some embodiments of the speaker 100 of the present invention, a shock isolation pad 29 is provided between the main speaker 20 and the cavity wall of the installation cavity 15, and the shock isolation pad 29 is arranged to surround the circumference of the front cavity 25.

[0089] In the technical solution of the foregoing embodiment, the main speaker 20 is disposed on the concave arc surface of the installation cavity 15 to enclose the front cavity 25 of the main speaker 20. In this embodiment, a shock isolation pad 29 arranged to surround the circumference of the front cavity 25 is provided between the main speaker 20 and the cavity wall of the installation cavity 15. The setting of the shock isolation pad 29 can play a role in buffering vibration, avoiding the vibration energy generated when the main speaker 20 makes the first diaphragm 231 vibrate and sound being transmitted to the housing 10 to drive the housing 10 to resonate and generate noise, which affects the sound quality of the speaker 100 and increases the risk of damage to internal components. Among them, the shock isolation pad 29 can be made of elastic materials such as sponge or rubber, which can effectively absorb vibration and reduce the transmission of vibration energy. At the same time, in some embodiments, the conductive member 35 of the auxiliary speaker 30 extends along the outer wall of the inner housing 21 of the main speaker 20 toward the main board 40. At this time, the conductive member 35 can pass through between the shock isolation pad 29 and the chassis 233 of the speaker unit 23. On the one hand, the shock isolation pad 29 can generate elastic deformation to fit the shape of the conductive member 35 to ensure the sealing of the front cavity 25. On the other hand, the shock isolation pad 29 can prevent the vibration energy generated when the second diaphragm 33 of the auxiliary speaker 30 vibrates from being transmitted to the housing 10 through the conductive member 35 to cause the housing 10 to resonate, thereby ensuring that the speaker 100 has a better sound effect.

[0090] Please refer to Figure 2 , in some embodiments of the speaker 100 of the present invention, the auxiliary speaker 30 is fixedly connected to the housing 10.

[0091] In this embodiment, the auxiliary speaker 30 is fixedly connected to the housing 10. Commonly, the housing 10 of the speaker 100 includes a front shell 11 and a rear shell 13. The front shell 11 and the rear shell 13 are covered with each other to form the aforementioned installation cavity 15. The speaker is fixed to the rear shell 13. At this time, after the auxiliary speaker 30 is fixedly installed on the front shell 11, the front shell 11 and the rear shell 13 are fixedly connected, which improves the disassembly and assembly convenience of the speaker 100. In some embodiments, the auxiliary speaker 30 is a piezoelectric speaker and includes an installation frame 31 and a second diaphragm 33. At this time, the installation frame 31 can be fixedly connected to the housing 10 to facilitate the disassembly and assembly of the auxiliary speaker 30.

[0092] Please refer to Figure 1 and Figure 3 , in some embodiments of the speaker 100 of the present invention, the speaker 100 further includes a mesh cloth 50, and the mesh cloth 50 is disposed on the outer side wall of the housing 10.

[0093] In this embodiment, a mesh cloth 50 is wrapped around the outer wall of the housing 10 of the speaker 100. The mesh cloth 50 can block dust in the space, preventing the dust from entering the interior of the speaker 100, preventing the aging of the internal components of the speaker 100, and ensuring the service life of the speaker 100. At the same time, numerous dense small holes are formed in the mesh cloth 50 to avoid the influence of the mesh cloth 50 on the sound output and heat dissipation of the speaker 100.

[0094] Please refer to Figure 1 , in some embodiments of the speaker 100 of the present invention, a battery is further provided in the accommodation cavity, and both the auxiliary speaker 30 and the main speaker 20 are electrically connected to the battery assembly. Here, the battery assembly mainly functions as a power source, so that the mobile and portable function of the speaker 100 can be realized. Further, the housing 10 is also provided with a charging interface 17. The charging interface 17 penetrates through the housing 10 and is electrically connected to the battery assembly. In this way, when the power of the battery assembly is exhausted, the battery assembly can be charged by connecting a power source through the charging interface 17, so as to ensure the service life of the speaker 100 without repeatedly replacing the battery.

[0095] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the description and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A speaker, characterized in that, Comprising: A housing, an installation cavity is formed inside the housing, at least part of the cavity wall of the installation cavity is a concave arc surface, and sound holes communicating the outside with the installation cavity are formed on the concave arc surface; A main speaker, the main speaker is arranged in the installation cavity, the main speaker covers the concave arc surface, and a front cavity of the main speaker is formed by enclosing with the concave arc surface, and the main speaker is a full-frequency speaker; And An auxiliary speaker, the auxiliary speaker is arranged in the front cavity and is spaced from the first diaphragm of the main speaker, and the auxiliary speaker is used for emitting medium and high audio frequencies.

2. The speaker according to claim 1, wherein The auxiliary speaker is a piezoelectric speaker.

3. The speaker according to claim 2, characterized in that, A through hole is formed in the second diaphragm of the piezoelectric speaker, and the through hole is arranged corresponding to the first diaphragm of the main speaker.

4. The speaker according to claim 2, wherein The piezoelectric speaker further includes an installation frame, the installation frame is provided with a hollow hole, and the second diaphragm of the piezoelectric speaker is embedded in the hollow hole and arranged opposite to the first diaphragm.

5. The speaker according to claim 4, characterized in that, The second diaphragm covers the surface of the installation frame facing the main speaker, and the cross-sectional area of the hollow hole gradually expands in a direction away from the main speaker.

6. The speaker according to claim 4, characterized in that The second diaphragm includes a vibrating piece and a piezoelectric piece, the vibrating piece covers one side surface of the installation frame, the piezoelectric piece is stacked on one side surface of the vibrating piece, the piezoelectric speaker further includes a conductive member, and the piezoelectric piece is electrically connected to the main board of the speaker through the conductive member.

7. The speaker according to claim 6, characterized in that, The installation frame is provided with a limiting groove, and one end of the conductive member is arranged in the limiting groove and is electrically connected to the piezoelectric piece; And / or, a plurality of the piezoelectric pieces are provided, and the plurality of piezoelectric pieces are stacked on the surface of the vibrating piece.

8. The speaker according to claim 1, characterized in that, The main board of the speaker is located below the main speaker, and a wiring terminal is arranged at the bottom of the main speaker, and the wiring terminal is in contact with the output terminal on the main board.

9. The speaker according to claim 8, characterized in that, The auxiliary speaker has a conductive member, and the conductive member extends along the outer wall of the main speaker to the main board and is electrically connected to the main board; And / or, the input end of the auxiliary speaker is electrically connected to the wiring terminal of the main speaker.

10. The speaker according to any one of claims 1 to 9, characterized in that A shock isolation pad is arranged between the main speaker and the cavity wall of the installation cavity, and the shock isolation pad is arranged in a circumferential direction around the front cavity; And / or, the auxiliary speaker is fixedly connected to the housing; And / or, the speaker further includes a mesh cloth, and the mesh cloth covers the outside of the housing.

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