CN114025279B - Flat plate sounding device and terminal equipment - Google Patents
Flat plate sounding device and terminal equipment Download PDFInfo
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- CN114025279B CN114025279B CN202111413844.5A CN202111413844A CN114025279B CN 114025279 B CN114025279 B CN 114025279B CN 202111413844 A CN202111413844 A CN 202111413844A CN 114025279 B CN114025279 B CN 114025279B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/15—Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
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- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
本申请公开了一种平板发声装置，所述平板发声装置包括：发声平板；声学组件，扣设在所述发声平板的第一侧以与所述发声平板之间形成容纳空间；激励组件，设置在所述发声平板的第一侧并位于所述容纳空间内；以及，支撑组件，与所述声学组件上的接触点接触以支撑所述声学组件；其中，所述接触点的振动位移小于等于所述声学组件的最大振动位移的三分之一，也就是说使声学组件与支撑组件的接触位置的振动位移较小甚至为零，从而减小或避免声学组件的振动向支撑组件传递进而向外传递振动，最终达到避免由此产生异常音和声音失真而影响声音重放的清晰度的问题。
The application discloses a flat-panel sound-generating device. The flat-panel sound-generating device includes: a sound-generating flat panel; an acoustic component buckled on the first side of the sound-generating flat panel to form an accommodation space with the sound-generating flat panel; and an excitation component disposed on the first side of the sound-emitting plate and located in the accommodation space; and, a support component, in contact with a contact point on the acoustic component to support the acoustic component; wherein the vibration displacement of the contact point is less than or equal to One-third of the maximum vibration displacement of the acoustic component, that is to say, the vibration displacement of the contact position between the acoustic component and the support component is small or even zero, thereby reducing or preventing the vibration of the acoustic component from being transmitted to the support component and then to the support component. The vibration is transmitted externally, and ultimately the problem of abnormal sound and sound distortion that affects the clarity of sound reproduction is avoided.
Description
Technical Field
The application belongs to the technical field of screen sounding, and particularly relates to a flat panel sounding device and terminal equipment.
Background
The flat sound device such as flat sound equipment, sound production screen can realize sound and follow panel, the screen output of flat panel, have that the directionality is good, the decay is less, appearance is ultra-thin not take up advantages such as space, sound production screen can also realize sound and follow the coincidence of making sound image and image in the display screen moreover, the enhancement people's sense of hearing experience. However, the flat panel sound generating device generates sound by bending vibration through the whole thin plate, and has the problems that the vibration is transmitted to the supporting frame, the abnormal sound distortion is generated by the vibration of the supporting frame, and the sound reproduction definition is affected.
Disclosure of Invention
The technical problems that the flat panel sound generating device transmits vibration to the supporting frame, causes abnormal vibration of the supporting frame and sound distortion to influence the definition of sound reproduction can be solved to a certain extent. Therefore, the application provides a flat panel sound generating device and terminal equipment.
The embodiment of the application provides a dull and stereotyped sound generating apparatus, dull and stereotyped sound generating apparatus includes:
a sounding panel;
the acoustic assembly is buckled on the first side of the sounding panel to form an accommodating space with the sounding panel;
an excitation assembly disposed on a first side of the sound emitting panel and positioned within the receiving space; the method comprises the steps of,
a support assembly in contact with a contact point on the acoustic assembly to support the acoustic assembly;
wherein the vibrational displacement of the contact point is less than or equal to one third of the maximum vibrational displacement of the acoustic assembly.
In some embodiments the flat panel sound emitting device further comprises:
the splicing assembly is arranged on one side, far away from the acoustic assembly, of the supporting assembly, and the splicing assembly is buckled on the supporting assembly.
In some embodiments the support assembly comprises:
a contact portion protruding toward the contact point to be in contact with the contact point; and, a step of, in the first embodiment,
and the supporting part is connected with the contact part and is used for supporting on the splicing assembly.
In some embodiments the support is a frame structure disposed on the splice assembly.
In some embodiments the support portion of the support assembly is in contact with a support point of the splice assembly to support the acoustic assembly by the splice assembly;
and the vibration displacement of the supporting point is less than or equal to one third of the maximum vibration displacement of the splicing assembly.
In some embodiments the vibration displacement of the contact point over all operating frequency ranges of the flat panel sound device is less than or equal to one third of the maximum vibration displacement of the acoustic assembly; and/or the vibration displacement of the supporting point in all working frequency ranges of the flat panel sound generating device is less than or equal to one third of the maximum vibration displacement of the splicing assembly.
In some embodiments the contact point has a vibration displacement at the natural frequency of the acoustic assembly of less than or equal to one third of the maximum vibration displacement of the acoustic assembly; and/or the vibration displacement of the supporting point under the natural frequency of the flat splicing component is less than or equal to one third of the maximum vibration displacement of the splicing component.
In some embodiments the contact point is located at a modal node of a modal analysis of the acoustic assembly and/or the support point is located at a modal node of a modal analysis of the splice assembly.
In some embodiments the contact points comprise at least three points that are not collinear; and/or the support point comprises at least three places which are not collinear.
In some embodiments the support portion protrudes toward the support point to be in corresponding contact with the support point.
In some embodiments the sound emitting panel has a display function.
In some embodiments, a connection frame is arranged between the acoustic assembly and the sounding panel, and the connection frame is fixed on the sounding panel through an adhesive.
The application also provides terminal equipment, which comprises a terminal equipment body and the flat panel sound generating device.
The embodiment of the application has at least the following beneficial effects:
according to the flat plate sounding device, the excitation component is arranged on the first side of the sounding flat plate and can excite the sounding flat plate so that the sounding flat plate can generate vibration sounding; the acoustic assembly surrounds the excitation assembly and is arranged on the first side of the sounding panel, so that on one hand, low-frequency response can be improved, low-frequency acoustic short circuit of the panel sounding device is avoided, on the other hand, resonance can be generated with the sounding panel to absorb part of low-frequency noise, and the problem of low-frequency distortion of the panel sounding device is avoided. The contact point between the supporting component and the acoustic component is further arranged to be in contact with the supporting component so as to further fix and support the acoustic component, so that the acoustic component is prevented from falling off from the sounding panel and losing the acoustic function of the acoustic component, meanwhile, in order to prevent the acoustic component from outwards transmitting vibration to generate abnormal sound distortion and influence the definition of sound reproduction, the vibration displacement of the contact point is smaller than or equal to one third of the maximum vibration displacement of the acoustic component, namely, the vibration displacement of the contact position of the acoustic component and the supporting component is smaller or even zero, and therefore the problem that the vibration of the acoustic component is transmitted to the supporting component and further outwards transmitted to finally avoid the influence on the definition of sound reproduction due to the abnormal sound distortion is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of a flat panel sound emitting device;
FIG. 2 illustrates a front view of the flat panel sound emitting device of FIG. 1;
FIG. 3 illustrates a longitudinal cross-sectional view of the flat panel sound emitting device of FIG. 2;
FIG. 4 illustrates a vibration transfer schematic of the flat panel sound emitting device of FIG. 1;
FIG. 5 illustrates a schematic diagram of the vibration displacement of the acoustic assembly in the flat panel sound device of FIG. 4;
fig. 6 is a schematic perspective view of a flat panel sound generating device according to a first embodiment of the present disclosure;
FIG. 7 illustrates a perspective view of the flat panel sound emitting device of FIG. 6;
FIG. 8 illustrates a front view of the flat panel sound emitting device of FIG. 6;
FIG. 9 illustrates a longitudinal cross-sectional view of the flat panel sound emitting device of FIG. 8;
FIG. 10 illustrates a longitudinal cross-sectional view of a flat panel sound emitting device according to a second embodiment of the present application;
FIG. 11 is a schematic view of the support assembly of the flat panel sound emitting device of FIG. 10;
FIG. 12 illustrates a longitudinal cross-sectional view of a flat panel sound emitting device according to a third embodiment of the present application;
FIG. 13 illustrates a schematic view of the support assembly structure of the flat panel sound emitting device of FIG. 12;
FIG. 14 illustrates a longitudinal cross-sectional view of a flat panel sound emitting device according to a fourth embodiment of the present application;
FIG. 15 is a schematic view of the support assembly of the flat panel sound emitting device of FIG. 14;
FIG. 16 illustrates a longitudinal cross-sectional view of a flat panel sound emitting device according to a fifth embodiment of the present application;
fig. 17 shows a modal analysis diagram of an acoustic assembly of a flat panel sound emitting device of the present application at different operating frequencies.
Reference numerals:
100. a sounding panel; 110. an adhesive; 120. a connection frame; 130. a flexible connection circuit; 140. a flat circuit; 200. an excitation assembly; 300. an acoustic assembly; 310. an acoustic tank floor; 311. a first contact point; 312. a second contact point; 313. a third contact point; 400. a support assembly; 411. a first support contact portion; 412. a second support contact portion; 413. a third support contact portion; 414. a fourth support contact portion; 420. a support frame; 500. a splice assembly; 510. splicing a bottom plate of the box body; 511. a first support point; 512. a second support point; 513. and a third supporting point.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
The present application is described below with reference to specific embodiments in conjunction with the accompanying drawings:
referring to fig. 1 to 17, a flat panel sound generating device according to the present application includes:
a sound emitting panel 100;
the acoustic assembly 300 is fastened to the first side of the sound emitting panel 100 to form an accommodating space with the sound emitting panel 100;
an excitation assembly 200 disposed at a first side of the sound emitting panel 100 and located in the receiving space; the method comprises the steps of,
a support assembly 400 in contact with a contact point on the acoustic assembly 300 to support the acoustic assembly 300;
wherein the vibrational displacement of the contact point is less than or equal to one third of the maximum vibrational displacement of the acoustic assembly 300.
In the flat panel sound generating device provided by the application, the excitation assembly 200 is arranged on the first side of the sound generating flat panel 100, and can excite the sound generating flat panel 100 to generate vibration sound; the acoustic assembly 300 is disposed on the first side of the sound emitting panel 100 around the outside of the excitation assembly 200, so that on one hand, the low frequency response can be improved, and the panel sound emitting device is prevented from being short-circuited in low frequency sound, and on the other hand, the panel sound emitting device can also resonate with the sound emitting panel 100 to absorb part of low frequency noise, and thus, the problem of low frequency distortion of the panel sound emitting device is avoided. Further, the contact point between the support assembly 400 and the acoustic assembly 300 is set to further fix and support the acoustic assembly 300 from falling off from the sound producing flat plate 100 to lose the acoustic function, and meanwhile, in order to avoid abnormal sound distortion caused by outward transmission of vibration of the acoustic assembly 300 and influence the sound reproduction definition, the vibration displacement of the contact point is smaller than or equal to one third of the maximum vibration displacement of the acoustic assembly 300, that is, the vibration displacement of the contact position between the acoustic assembly 300 and the support assembly 400 is smaller or even zero, so that the vibration of the acoustic assembly 300 is transmitted to the support assembly 400 to further transmit the vibration outwards, and finally, the problem of avoiding the influence on the sound reproduction definition caused by abnormal sound distortion caused by the abnormal sound distortion is solved.
In a conventional speaker, a diaphragm for sounding is connected to a frame of the speaker through a flexible folder, so that the flexible folder can partially absorb vibration of the diaphragm, and abnormal sound and distortion generated by the frame vibration due to the transmission of the vibration of the diaphragm to the frame are prevented. However, in the flat-plate sound production technology, the flat-plate diaphragm is used for replacing the traditional cone-shaped diaphragm, the whole flat-plate diaphragm is excited to perform bending vibration, and soft folding rings cannot be arranged around the flat-plate diaphragm to buffer vibration, so that serious flat-plate diaphragm transmits vibration to a frame in flat-plate sound production, abnormal sound and distortion are caused by the vibration of the frame, and the definition of sound reproduction is affected.
As shown in fig. 6 to 16, the flat panel sound generating apparatus provided in the present application includes a generating flat panel, an acoustic assembly 300 fastened to a first side of the sound generating flat panel 100 to form a receiving space with the sound generating flat panel 100, an excitation assembly 200 disposed at the first side of the sound generating flat panel 100 and located in the receiving space, and a support assembly 400 contacting with a contact point on the acoustic assembly 300 to support the acoustic assembly 300.
In order to improve the low-frequency response and avoid the low-frequency acoustic short circuit, an acoustic assembly 300 is disposed on the sounding panel 100 and on the same side of the sounding panel 100 as the excitation assembly 200, and the acoustic assembly 300 is fastened on the sounding panel 100 and surrounds the excitation assembly 200 to form a space for accommodating the excitation assembly 200. The acoustic assembly 300 can form a closed space together with the sound emitting panel 100, so as to avoid an acoustic short circuit caused by mutual cancellation when the sound wave moving toward the first side of the sound emitting panel 100 by the sound emitting panel 100 and the sound wave moving toward the opposite side of the sound emitting panel 100 opposite to the first side are opposite, and also to block noise sound in the direction of the first side of the sound emitting panel 100. Preferably, the acoustic assembly 300 includes an acoustic box with an opening at one end, and the opening end of the acoustic box is fastened to the sounding panel 100, so as to form a sealing structure with the sounding panel to improve the low-frequency response of the panel sounding device. The acoustic assembly 300 may be made of materials with suitable properties such as acrylonitrile-butadiene-styrene plastic (Acrylonitrile Butadiene Styrene plastic, ABC plastic) or plexiglass sound;
wherein, as an optional implementation manner, the flat panel sound generating device is further provided with a splicing component 500 to support the acoustic component 300, accommodate the flat panel circuit 140, and realize the splicing with other components, and in the embodiment of the present application, the splicing component 500 is disposed on the side of the supporting component 400 away from the acoustic component 300, for splicing the flat panel sound generating device with other devices; further preferably, the splice assembly 500 includes a splice box having an open end, the open end of the splice box being fastened to the acoustic assembly 300 and not in direct contact with the acoustic assembly 300 through the support assembly 400. Splice assembly 500 is typically manufactured from cast aluminum.
Wherein, optionally, a connection frame 120 is further provided between the sound emitting panel 100 and the acoustic assembly 300. Further alternatively, the connection frame 120 and the sound emitting panel 100 are connected together by an adhesive 110 such as a double sided tape.
The panel circuit 140 is disposed on a side of the acoustic assembly 300 adjacent to the splice assembly 500 or in the splice assembly 500, the panel circuit 140 is connected to the sound emitting panel 100 through a flexible connection circuit (FPC) 130, and in order to make the FPC pass through the acoustic assembly 300 and the splice assembly 500 to connect with the sound emitting panel 100, corresponding structures such as a wire hole or a slit may be reserved at corresponding positions of the acoustic assembly 300 and the splice assembly 500 for the FPC to pass through.
As shown in fig. 1 to 5, if the support member 400 is brought into direct contact with the sound emitting member, the acoustic member 300 is caused to vibrate when the plate vibration radiation sound occurs. As shown in fig. 4 and 5, the sound emitting panel 100 is excited by the excitation assembly 200 provided at one side thereof to generate bending vibration sound, and transmits the vibration to the acoustic box fastened thereto. The dashed line in the figure is an example of displacement transfer at a certain frequency, which tends to transfer vibrations to the splice case due to the direct contact of the acoustic assembly 300 with the splice assembly 500. As can be seen from the figure, the vibration of the sound emitting panel 100 is transmitted to the acoustic box through the side wall of the acoustic box, so that the vibration of the bottom of the acoustic box generates a vibration displacement. Since the splice assembly 500 is typically fabricated from cast aluminum, the damping is relatively small and once the vibrations of the acoustic assembly 300 are transmitted into the splice assembly 500, the vibrations of the splice assembly 500 are difficult to quickly attenuate resulting in severe tailsounds that affect the sound reproduction clarity.
In order to solve the above problems, the present application has found through researches that, as shown in fig. 5, the bottom of the acoustic box body will generate different vibration displacements in vibration, and some places have larger vibration displacements, such as the peaks and troughs of the dashed line in fig. 5; there are places where the vibration displacement is small or even zero, such as the intersection of the dashed line in the diagram of fig. 5 with the bottom of the acoustic tank. Based on the above findings and the inventive concept of reducing or avoiding transmission of vibrations to the outside, in the present application, an inventive concept different from providing a flexible gimbal to buffer vibrations is proposed: the contact point between the component that transmits the vibration outward and the component that receives the vibration is set at a position where the vibration displacement of the component that transmits the vibration outward is small or even zero, so that the vibration displacement of the contact point is equal to or less than one third of the maximum vibration displacement of the acoustic component 300. In this way, even if the vibration is transmitted outward, the transmitted vibration is small, thereby avoiding the problem that the abnormal sound distortion caused by the transmitted vibration affects the sound reproduction clarity.
In the present application, the vibration displacement of the contact point is equal to or less than one third of the maximum vibration displacement of the acoustic assembly 300, which means that the vibration displacement of the acoustic enclosure at any frequency is equal to or less than one third of the maximum vibration displacement of the acoustic enclosure, and further preferably, all the vibration displacements of the acoustic enclosure at the operating frequency of the flat panel acoustic device are equal to or less than one third of the maximum vibration displacement of the acoustic enclosure.
In the above embodiment, the support assembly 400 is independently disposed between the acoustic assembly 300 and the splice assembly 500, and the support assembly 400 is fixedly connected with the acoustic assembly 300 and the splice assembly 500 by magnetic attraction, or by an adhesive 110 such as double-sided tape. In other embodiments, the support assembly 400 may be integrally formed with the acoustic assembly 300, such as a portion protruding toward the splice case is provided as the support assembly 400 at a position where the vibration displacement of the acoustic assembly 300 is less than or equal to one third of the maximum vibration displacement of the acoustic assembly 300. In another embodiment, the support assembly 400 may be integrally formed with the splice assembly 500, and a portion protruding toward the acoustic assembly 300 is disposed on the splice assembly 500 as the support assembly 400, and the support assembly 400 corresponds to a position where the vibration displacement of the acoustic assembly 300 is less than or equal to one third of the maximum vibration displacement of the acoustic assembly 300. In the present application, whether the support assembly 400 is provided independently or integrally with the acoustic assembly 300 or the splice assembly 500, vibration can be transmitted between the acoustic assembly 300 and the splice assembly 500 without direct contact.
In the above embodiment, the working frequency of the flat panel sound generating device is preferably 20Hz to 20kHz, that is, the audio frequency of the flat panel sound generating device is a broadband signal, and the vibration displacement of the contact point in any of the working frequency ranges is less than one third of the maximum vibration displacement of the acoustic assembly 300; the contact point is preferably a coincident position where the vibration displacement is less than or equal to one third of the maximum vibration displacement of the acoustic assembly 300 at as many frequencies as possible; more preferably, the contact points are coincident with minimal vibrational displacement at as many frequencies as possible.
As an alternative embodiment, as shown in fig. 10 to 15, the support assembly 400 includes: a contact portion protruding toward the contact point to be in contact with the contact point; and a supporting part connected with the contact part for supporting on the splice assembly 500. Alternatively, as shown in fig. 10, 12, and 14, the supporting portion is a frame structure and is disposed on the splice assembly 500, for example, the supporting portion of the frame structure may be disposed at an open end of the splice case. In other embodiments, the support portion of the frame structure may also be disposed at the bottom of the splice case.
As a further alternative embodiment, the support portion of the support assembly 400 is in contact with the support point of the splice assembly 500 to support the acoustic assembly 300 through the splice assembly 500;
wherein the vibration displacement of the support point is less than or equal to one third of the maximum vibration displacement of the splice assembly 500.
In the foregoing, the modal analysis of the acoustic enclosure is described in detail, and it is known that a point with small or even zero vibration displacement exists at the bottom of the acoustic enclosure as a contact point. Similarly, in the spliced box, there is also a point where the vibration displacement is small or even zero. The supporting points where the splicing assembly 500 and the supporting assembly 400 are in contact are arranged at the positions, so that when vibration is transmitted to the supporting points, the vibration transmitted from the positions of the supporting points to other positions of the splicing box body is small or zero.
As an alternative embodiment, the vibration displacement of the contact point is less than or equal to one third of the maximum vibration displacement of the acoustic assembly 300 over all operating frequency ranges of the flat panel sound device; and/or, the vibration displacement of the supporting point in all working frequency ranges of the panel sound generating device is less than or equal to one third of the maximum vibration displacement of the splicing assembly 500.
Because the vibration displacements of the object at different excitation frequencies are different, in the above embodiment, it is preferable to perform modal analysis on the acoustic assembly 300 in the operating frequency range of the flat panel sound generating apparatus, obtain the maximum vibration displacement of the acoustic assembly 300 in the operating frequency range, and obtain, by comparison and analysis, the position where the vibration displacement of the acoustic assembly 300 at any operating frequency is one third or less of the maximum vibration displacement thereof as the contact point; it is further preferable that a position where the vibration displacement of the acoustic assembly 300 at the operating frequency is one third or less of the maximum vibration displacement thereof is obtained as much as possible as a contact point; still further preferably, a position at which the vibration displacement of the acoustic assembly 300 is one third or less of its maximum vibration displacement at all operating frequencies is obtained as a contact point, and a position at which the vibration displacement is one third or less of the maximum vibration displacement at all operating frequencies is obtained as a contact point with the support assembly 400, even though the acoustic assembly 300 transmits vibration to the support assembly 400, the transmitted vibration is relatively small.
As an alternative embodiment, the vibration displacement of the contact point at the natural frequency of the acoustic assembly 300 is less than or equal to one third of the maximum vibration displacement of the acoustic assembly 300; and/or, the vibration displacement of the supporting point at the natural frequency of the flat splice assembly 500 is less than or equal to one third of the maximum vibration displacement of the splice assembly 500.
In general, when the excitation frequency is the same as the natural frequency of the excited object itself, the vibration displacement of the excited object that generates resonance is maximized, and in this embodiment, by taking a position where the vibration displacement of the acoustic assembly 300 at its natural frequency is less than or equal to one third of the maximum vibration displacement of the acoustic assembly 300 as a contact point with the support assembly 400, it is possible to ensure that the vibration displacement of the contact point is less than one third of the maximum vibration displacement in all operating frequency ranges, avoiding transmission of large vibrations to the support assembly 400. Similarly, by using the position of the splice assembly 500 having a vibration displacement at its natural frequency less than or equal to one third of the maximum vibration displacement of the splice assembly 500 as the supporting point in contact with the supporting assembly 400, it is possible to ensure that the vibration displacement of the supporting point in all operating frequency ranges is less than or equal to one third of the maximum vibration displacement, and to avoid large vibrations transmitted from the supporting assembly 400.
As a further preferred embodiment, the contact point is located at a modal node of the modal analysis of the acoustic assembly 300 and/or the support point is located at a modal node of the modal analysis of the splice assembly 500. It is further preferred that the contact point is located at a modal node of the modal analysis of the acoustic assembly 300 at the natural frequency of the acoustic assembly 300 and/or that the support point is located at a modal node of the modal analysis of the splice assembly 500 at the natural frequency of the splice assembly 500. As shown in fig. 17, the acoustic assembly 300 has different modes at different operating frequencies, wherein the mode node is a point where the mode shape is zero in each mode, that is, the position does not vibrate and generate vibration displacement, that is, vibration is not transmitted outwards. The position is used as a contact point contacted with the support assembly 400, and the support assembly 400 contacted with the position can not vibrate to generate displacement because the position can not vibrate, so that the problem that the sound reproduction definition is affected due to the fact that the acoustic assembly 300 transmits vibration to the support assembly 400, namely, abnormal sound distortion caused by the fact that the acoustic assembly 300 transmits the vibration outwards is avoided. Similarly, similar modal analysis and vibration transfer modes exist for the splice assembly 500 and are not described in detail herein.
In the above embodiment, by defining the positions of the supporting points of the splice assembly 500 and the supporting assembly 400, even if weak vibration is transmitted to the splice assembly 500, since the contact point is located at the position of the vibration displacement of the splice assembly 500 or the mode node, the vibration of the contact point cannot be transmitted to other positions of the splice assembly 500, that is, the mode of the splice assembly 500 at the frequency point is not excited, so that the distortion caused by the vibration of the splice assembly can be further weakened, and the voice definition is improved.
As an alternative embodiment, the contact point comprises at least three points that are not collinear; and/or the support point comprises at least three places which are not collinear. The contact points at which the acoustic assembly 300 contacts the support assembly 400 include three points that are not collinear, and a plane can be defined by the three points of contact, making the support of the acoustic assembly 300 by the support assembly 400 more balanced and stable. Similarly, the support points at which the splice assembly 500 contacts the support assembly 400 include three points that are not collinear, and a plane can be defined by the three points of support, so that the support of the splice assembly 500 to the support is more balanced and stable. With continued reference to fig. 5, when the acoustic enclosure bottom plate 310 vibrates, there is a mode node position with zero vibration displacement or a position with vibration displacement less than or equal to one third of the maximum vibration displacement of the acoustic assembly 300, such as a position where a dashed line intersects with the acoustic enclosure bottom surface, and three non-collinear points are selected as the first contact point 311, the second contact point 312, and the third contact point 313 for contacting the support assembly 400. Referring to fig. 16, when the splice case bottom panel 510 vibrates, there is a mode node position with zero vibration displacement or a position with vibration displacement less than or equal to one third of the maximum vibration displacement of the splice assembly 500, and three non-collinear points are selected as the first supporting point 511, the second supporting point 512 and the third supporting point 513, respectively, for contacting the supporting assembly 400 to support the acoustic assembly 300 through the supporting assembly 400.
It should be noted that reference to "contact point" and "support point" in this application are not meant to refer to virtual "points" in the sense of reality, but to a plane having a certain area size. For example, when the contact point of the acoustic assembly 300 with the support assembly 400 is sufficiently large, the support assembly 400 can balance and stably support the acoustic assembly 300 through the one contact point, and the contact point of the acoustic assembly 300 with the support assembly 400 can be included only at this point.
In the above embodiment, the structure of the support assembly 400 may be adjusted according to the positions and the number of the contact points where the acoustic assembly 300 contacts the support assembly 400, so that the structure of the support assembly 400 that can support the acoustic assembly 300 through the contact points is all within the scope of protection of the present application.
Preferably, in the above-described embodiment, the supporting portion of the supporting assembly 400 protrudes toward the supporting point to be in corresponding contact with the supporting point. As shown in fig. 16, the contact portion of the support assembly 400 protrudes toward the contact point of the acoustic assembly 300 to be in contact with the contact point, and the support portion of the support assembly 400 protrudes toward the support point of the splice assembly 500 to be in contact with the support point, so that the contact point of the acoustic assembly 300 is indirectly connected with the support point of the splice assembly 500 through the support assembly 400, and during the vibration transmission, firstly, the vibration transmission at the contact point is weak and is set to zero, and secondly, the vibration transmission at the support point is weak and even zero, and finally, the vibration transmitted to the splice assembly 500 is reduced or even eliminated through the vibration transmission at the contact point and the support point, thereby avoiding the problem that the sound reproduction clarity is affected by the abnormal sound distortion generated thereby.
As shown in fig. 6 to 9, the flat panel sound generating apparatus according to the first embodiment of the present application includes a sound generating flat panel 100, an excitation assembly 200, an acoustic assembly 300, a splice case, and a support assembly 400. In this embodiment, the support assembly 400 includes three relatively independent rectangular parallelepiped-shaped first, second and third support contacts 411, 412 and 413. As shown in fig. 17, as can be seen from the modal analysis of the acoustic assembly 300, the positions with smaller vibration displacement, that is, the positions satisfying less than one third of the maximum vibration displacement generated by the acoustic assembly 300 in the operating frequency range, are distributed on both sides of a diagonal line at the bottom of the acoustic box, in this embodiment, the first support contact 411 and the third support contact 413 are respectively disposed at both ends of the diagonal line, the second support contact 412 is disposed at one side of the diagonal line and adjacent to one end thereof, and the first support contact 411 and the third support contact 413 correspond to three support points of different lines together, so that the first support contact 411, the second support contact 412 and the third support contact 413 are clamped between the bottom of the acoustic box and the open end face of the splice box.
As shown in fig. 10 and 11, the flat panel sound generating device of the second embodiment of the present application includes a sound generating flat panel 100, an excitation assembly 200, an acoustic assembly 300, a splice case, and a support assembly 400. In this embodiment, the support assembly 400 includes a support frame 420, and first, second and third support contacts 411, 412 and 413 convexly provided on the support frame 420. With continued reference to fig. 17, in this embodiment, the first support contact 411, the second support contact 412 and the third support contact 413 are respectively disposed at the positions with smaller vibration displacements at two sides corresponding to the diagonal line, the support frame 420 is divided into two parts, the first support contact 411, the second support contact 412 and the third support contact 413 are respectively disposed on the two parts of the support frame 420, and the first support contact 411, the second support contact 412 and the third support contact 413 are clamped on the bottom of the acoustic box and the opening end face of the splice box by the support frame 420.
As shown in fig. 12 and 13, the flat panel sound generating apparatus according to the third embodiment of the present application includes a sound generating flat panel 100, an excitation assembly 200, an acoustic assembly 300, a splice case, and a support assembly 400. In this embodiment, the support assembly 400 includes a support frame 420 and first, second, third and fourth support contacts 411, 412, 413 and 414 convexly disposed on four rims of the support frame 420. With continued reference to fig. 17, the first support contact 411, the second support contact 412, the third support contact 413, and the fourth support contact 414 of this embodiment are respectively disposed on two sides corresponding to the diagonal line and have a distance from the end point of the diagonal line smaller than 1/2 of the bottom edge length of the acoustic box.
As shown in fig. 14 and 15, the flat panel sound generating apparatus according to the fourth embodiment of the present application includes a sound generating flat panel 100, an excitation assembly 200, an acoustic assembly 300, a splice case, and a support assembly 400. In this embodiment, the support assembly 400 includes a support frame 420 and first, second, third and fourth support contacts 411, 412, 413 and 414 convexly disposed on a rim of the support frame 420. With continued reference to fig. 17, the first support contact 411, the second support contact 412, the third support contact 413, and the fourth support contact 414 of the present embodiment are disposed at both ends and both sides of the diagonal line, respectively.
In other embodiments, the support assembly 400 may further include a support frame 420 and first, second, third and fourth support contacts 411, 412, 413 and 414 convexly disposed on a rim of the support frame 420, wherein the first and second support contacts 411 and 412 may be disposed at both ends corresponding to the diagonal lines, and the third and fourth support contacts 413 and 414 are disposed adjacent to the first and second support contacts 411 and 412.
In other embodiments, the support assembly 400 may further include a support frame 420, a corbel disposed on the support frame 420 and extending toward the inside of the support frame 420, and first, second, and third support contacts 411, 412, 413 disposed on the corbel. With reference to fig. 17, the position of the strut beam is adjusted such that the first, second and third support contact portions 411, 412, 413 are adjacent to the two sides of the diagonal line, that is, the positions where the vibration displacement is small.
In the above embodiment, the vibration received from the acoustic box by the support assembly 400 is weak, and thus the vibration transmitted to the splice box is also weak, thereby achieving the purpose of reducing distortion and improving the clarity of sound reproduction.
As shown in fig. 16, the flat panel sound generating apparatus of the fifth embodiment of the present application includes a sound generating flat panel 100, an excitation assembly 200, an acoustic assembly 300, a splice case, and a support assembly 400. In this embodiment, the support assembly 400 includes: a support frame 420; a first support contact 411, a second support contact 412, and a third support contact 413 provided at one side of the support frame 420; and a first support part, a second support part, and a third support part disposed at the other side corresponding to the support frame 420. The support assembly 400 is in contact with the first contact point 311, the second contact point 312, and the third contact point 313 of the acoustic box through the first, second, and third support contact portions 411, 412, and 413, respectively; the first support part, the second support part and the third support part are respectively contacted with the first support point 511, the second support point 512 and the third support point 513 of the splicing box body. In this embodiment, the vibration received by the support assembly 400 from the acoustic box is small or even zero, so that the vibration transmitted to the splice box is small or even zero, the vibration received by the support points of the splice box is small or even zero, and the vibration is not transmitted to other positions of the splice box or transmitted to other positions of the splice box, so that the vibration is weakened or even eliminated by the transmission process, and finally the whole vibration of the splice box can be weakened, so that the technical problem that the clarity of sound reproduction is affected due to the abnormal and sound distortion generated by the transmission of the vibration of the acoustic assembly 300 is solved.
As an alternative embodiment, the sound emitting panel 100 has a display function. That is, the flat panel sound production device can be used in flat panel sound equipment, can be applied to the field of sound production screens, and can output sound from the display screen so as to enable sound images and images to coincide, and the viewing experience of people is enhanced.
The second broad aspect of the present application further provides a terminal device, which includes a terminal device body and the flat panel sound generating device described above.
Because the terminal equipment provided by the invention comprises the flat panel sound generating device in the technical scheme, the terminal equipment provided by the application has all the beneficial effects of the flat panel sound generating device, and the detailed description is omitted.
In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise" indicate or positional relationships are based on the positional relationships shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
It should be noted that all the directional indicators in the embodiments of the present application are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.
In the present application, unless explicitly specified and limited otherwise, the terms "coupled," "secured," and the like are to be construed broadly, and for example, "secured" may be either permanently attached or removably attached, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be. In addition, descriptions such as those related to "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated in this application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (13)
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| CN114025279A (en) | 2022-02-08 |
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