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WO2022062123A1 - Mobile terminal - Google Patents

Mobile terminal Download PDF

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Publication number
WO2022062123A1
WO2022062123A1 PCT/CN2020/128779 CN2020128779W WO2022062123A1 WO 2022062123 A1 WO2022062123 A1 WO 2022062123A1 CN 2020128779 W CN2020128779 W CN 2020128779W WO 2022062123 A1 WO2022062123 A1 WO 2022062123A1
Authority
WO
WIPO (PCT)
Prior art keywords
piezoelectric sheet
vibration
exciter
mobile terminal
screen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/128779
Other languages
French (fr)
Chinese (zh)
Inventor
王尧
刘柯佳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AAC Technologies Holdings Shenzhen Co Ltd
AAC Microtech Changzhou Co Ltd
Original Assignee
AAC Acoustic Technologies Shenzhen Co Ltd
AAC Microtech Changzhou Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AAC Acoustic Technologies Shenzhen Co Ltd, AAC Microtech Changzhou Co Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2022062123A1 publication Critical patent/WO2022062123A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0279—Improving the user comfort or ergonomics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
    • H04M1/035—Improving the acoustic characteristics by means of constructional features of the housing, e.g. ribs, walls, resonating chambers or cavities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Definitions

  • the invention relates to the field of electro-acoustic conversion, in particular to a mobile terminal.
  • a related art mobile terminal includes a casing, a screen covered on the casing and enclosing an accommodation space, and an exciter installed in the accommodation space and abutting against the screen, and the screen is driven by the exciter vibrating. Vibrate sound.
  • the mobile terminal in the related art drives the screen to vibrate and emit sound by vibrating an exciter, and the screen vibration causes the casing connected to the screen to follow the vibration. Vibration will be felt, which will make the user experience bad.
  • the purpose of the present invention is to provide a mobile terminal with small casing vibration and good user experience.
  • the present invention provides a mobile terminal, which includes a middle frame, a screen and a back cover that are respectively covered on opposite sides of the middle frame and jointly enclose a receiving space, and a back cover is directed from the middle frame to the receiving space.
  • the exciter drives the screen to vibrate and sound
  • the first piezoelectric sheet senses the vibration of the back cover and generates a voltage signal
  • the second piezoelectric sheet generates reverse vibration according to the voltage signal, so
  • the vibration direction in which the reverse vibration drives the rear cover to vibrate is opposite and equal in magnitude to the vibration direction in which the exciter drives the rear cover to vibrate, so as to offset the conduction of the exciter to the rear cover through the fixed wall. vibration to make the back cover still.
  • the exciter is in contact with the screen.
  • the orthographic projection of the exciter to the back cover along the vibration direction of the screen, the first piezoelectric sheet and the second piezoelectric sheet are arranged at a distance from each other.
  • the orthographic projection of the fixed wall to the screen along the vibration direction of the screen, the orthographic projection of the first piezoelectric sheet to the screen along the vibration direction, and the orthographic projection of the second piezoelectric sheet to the screen Orthographic projections of the vibration directions to the screen are spaced apart from each other.
  • the second piezoelectric sheet is located at the center of the back cover.
  • the area of the second piezoelectric sheet is larger than that of the first piezoelectric sheet.
  • the mobile terminal further includes a processor installed in the receiving space, the processor is electrically connected to the first piezoelectric sheet and the second piezoelectric sheet, respectively, to receive and analyze the The voltage signal generates a driving signal for driving the second piezoelectric sheet to vibrate according to the voltage signal, and the second piezoelectric sheet receives the driving signal to generate the reverse vibration.
  • the processor is electrically connected to the first piezoelectric sheet and the second piezoelectric sheet, respectively, to receive and analyze the The voltage signal generates a driving signal for driving the second piezoelectric sheet to vibrate according to the voltage signal, and the second piezoelectric sheet receives the driving signal to generate the reverse vibration.
  • the processor is electrically connected to the exciter, and the processor drives the exciter to generate vibration.
  • the middle frame, the fixed wall and the rear cover are integrally formed.
  • a fixed wall is formed by extending the middle frame, and the fixed wall is accommodated in the accommodating space, and then the exciter is arranged on the fixed wall, and the first piezoelectric sheet and the second pressure
  • the electric sheets are arranged on the back cover at intervals.
  • the reverse vibration drives the rear cover to vibrate in the opposite direction and equal in magnitude to the vibration direction of the exciter to drive the rear cover to vibrate.
  • the vibration of the cover makes the back cover still, thereby greatly reducing the casing vibration of the mobile terminal, so that the user will feel less vibration when holding the mobile terminal, so that the user experience is good.
  • FIG. 1 is a schematic three-dimensional structure diagram of a mobile terminal of the present invention.
  • FIG. 2 is an exploded view of a part of the three-dimensional structure of the mobile terminal of the present invention
  • Fig. 3 is a sectional view along line A-A in Fig. 1;
  • FIG. 4 is a partial enlarged schematic view of the part shown in B in FIG. 3 .
  • the present invention provides a mobile terminal 100, the mobile terminal 100 includes a middle frame 1, a fixed wall 2, a back cover 3, a screen 4, a first exciter 5, and a first piezoelectric sheet 6 and the second piezoelectric sheet 7 .
  • the mobile terminal 100 may be a mobile phone, a tablet computer, a phone watch, or the like.
  • the middle frame 1 has an annular hollow structure.
  • the screen 4 and the back cover 3 are respectively covered on opposite sides of the middle frame 1 .
  • the middle frame 1 , the screen 4 and the back cover 3 together form an accommodation space 10 .
  • the fixed wall 2 is formed by extending from the middle frame 1 into the receiving space 10 .
  • the fixed wall 2 is spaced apart from the rear cover 3 .
  • the fixed wall 2 is used for mounting the exciter 5 .
  • the screen 4 is covered on the middle frame 1 .
  • the screen 4 can be different types of screens, such as OLED hard screen, soft screen and LCD.
  • the middle frame 1 , the fixed wall 2 and the back cover 3 are integrally formed. This structure facilitates easy assembly of the mobile terminal 100 , and makes the mobile terminal 100 sturdy and conducive to excitation. Adjustment of the shell vibration of the mobile terminal 100 by the device 5 and the second piezoelectric sheet 7 .
  • the exciter 5 is used to generate vibration to drive the screen 4 to sound.
  • the exciter 5 is installed in the receiving space 10 . Specifically, the exciter 5 is fixed on the side of the fixed wall 2 close to the screen 4 .
  • the first exciter 5 is in contact with the screen 4 . That is, the exciter 5 is sandwiched between the fixed wall 2 and the screen 4 .
  • the exciter 5 is in contact with the screen 4 and drives the screen 4 to emit sound through vibration.
  • the exciter 5 can also be an integrated device disposed on the fixed wall 2 and spaced from the screen 4. This structure drives the fixed wall 2 to vibrate through the exciter 5, It is also possible to drive the screen 4 to emit sound through the vibration of the fixed wall 2 being transmitted to the middle frame 1 and the screen 4 in turn.
  • the first piezoelectric sheet 6 is installed in the receiving space 10 . Specifically, the first piezoelectric sheet 6 is fixed to the rear cover 3 .
  • the first piezoelectric sheet 6 senses the vibration of the back cover 3 and generates a voltage signal.
  • the exciter 5 drives the screen 4 to emit sound, it is inevitable that the vibration of the exciter 5 is transmitted to the middle frame 1 and the back cover 3 in turn, thereby causing the casing of the mobile terminal 100 to vibrate. .
  • the user will feel the vibration when holding the mobile terminal 100 .
  • the back cover 3 drives the first piezoelectric sheet 6 to deform. Due to the device properties of the first piezoelectric sheet 6, its deformation causes a certain voltage to be generated at both ends of the first piezoelectric sheet 6. The greater the deformation of the first piezoelectric sheet 6, the greater the The greater the voltage generated across the piezoelectric sheet 6 is, the voltage signal is formed.
  • the second piezoelectric sheet 7 is installed in the receiving space 10 . Specifically, the second piezoelectric sheet 7 is fixed to the rear cover 3 . Wherein, the second piezoelectric sheet 7 and the first piezoelectric sheet 6 are arranged at intervals.
  • the second piezoelectric sheet 7 generates reverse vibration according to the voltage signal.
  • the vibration direction in which the reverse vibration drives the rear cover 3 to vibrate is opposite and equal in magnitude to the vibration direction in which the exciter 5 drives the rear cover 3 to vibrate, which is used to offset the passage of the exciter 5 through the fixed wall 2 .
  • the vibrations are transmitted to the rear cover 3 to make the rear cover 3 stationary. That is to say, the vibration generated by the second piezoelectric sheet 7 and the vibration generated by the exciter 5 are opposite to each other in the back cover 3 , that is, they can cancel each other out.
  • This structure enables the second piezoelectric sheet 7 to generate damping vibration corresponding to the vibration generated by the exciter 5 , thereby greatly reducing the casing vibration of the mobile terminal 100 . Therefore, the vibration that the user feels when holding the mobile terminal 100 is small, so that the user's use experience is good.
  • the orthographic projection of the exciter 5 to the back cover 3 along the vibration direction of the screen 4 and the first piezoelectric sheet 6 and the second piezoelectric sheet 7 are spaced apart from each other.
  • the exciter 5 , the first piezoelectric sheet 6 and the second piezoelectric sheet 7 are respectively arranged in different positions of the housing 1 and are not easy to cause resonance.
  • the vibration of the exciter 5 will not directly affect the first piezoelectric sheet 6 through the air in the accommodation space 10 , and the vibration of the back cover 3 triggers the vibration of the first piezoelectric sheet 6 .
  • this structure is advantageous in that when the second piezoelectric sheet 7 and the exciter 5 vibrate at the same time, the effect of mutually canceling the shell vibration of the mobile terminal 100 is good.
  • the air in the receiving space 10 of the fixed wall 2 directly affects the first piezoelectric sheet 6 .
  • the orthographic projection of the fixed wall 2 to the screen 4 along the vibration direction of the screen 4 the orthographic projection of the first piezoelectric sheet 6 to the screen 4 along the vibration direction, and the The orthographic projections of the second piezoelectric sheets 7 to the screen 4 along the vibration direction are spaced apart from each other.
  • the second piezoelectric sheet 7 is located at the center of the rear cover 3 . This position enables the second piezoelectric sheet 7 to drive the rear cover 3 with the largest vibration amplitude, so as to have a good effect on the casing 1 , so that the second piezoelectric sheet 7 cancels the exciter 5 The effect on the casing vibration of the mobile terminal 100 is good.
  • the area of the second piezoelectric sheet 7 is larger than that of the first piezoelectric sheet 6 . This arrangement ensures that the first piezoelectric sheet 6 senses the shell vibration state of the mobile terminal 100 , and at the same time enables the second piezoelectric sheet 7 to cancel the shell vibration of the mobile terminal 100 caused by the exciter 5 more efficient.
  • the mobile terminal 100 further includes the processor 8 installed in the receiving space 10 .
  • the processor 8 is respectively electrically connected with the first piezoelectric sheet 6 and the second piezoelectric sheet 7 to receive and analyze the voltage signal and generate and drive the second piezoelectric sheet 7 according to the voltage signal Vibration drive signal.
  • the second piezoelectric sheet 7 receives the driving signal to generate the reverse vibration.
  • the processor 8 is electrically connected to the exciter 5 .
  • the processor 8 drives the exciter 5 to vibrate.
  • the processor 8 can also optimize the vibration for driving the exciter 5 after analyzing the voltage signal. That is, the processor 8 drives the exciter 5 and the second piezoelectric sheet 7 at the same time, so that the shell vibration of the mobile terminal 100 can be controlled to a very small level, so that the user experience is good.
  • the processor 8 can also adjust the casing vibration of the mobile terminal 100 according to user requirements, and can dynamically adjust the vibration in some scenarios requiring vibration, such as vibrating with the rhythm of music and giving an alarm.
  • the exciter 5, the first piezoelectric sheet 6, the second piezoelectric sheet 7 and the processor 8 are all components or modules commonly used by those skilled in the art, and are used in the design and use of The specific models used in the above are selected according to actual needs, and will not be described in detail here.
  • a fixed wall is formed by extending the middle frame, and the fixed wall is accommodated in the accommodating space, and then the exciter is arranged on the fixed wall, and the first piezoelectric sheet and the second pressure
  • the electric sheets are arranged on the back cover at intervals.
  • the reverse vibration drives the rear cover to vibrate in the opposite direction and equal in magnitude to the vibration direction of the exciter to drive the rear cover to vibrate.
  • the vibration of the cover makes the back cover still, thereby greatly reducing the casing vibration of the mobile terminal, so that the user will feel less vibration when holding the mobile terminal, so that the user experience is good.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Telephone Set Structure (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

The present invention provides a mobile terminal, comprising a middle frame; a screen and a rear cover that respectively cover the two opposite sides of the middle frame and together define an accommodating space; a fixed wall extending into the accommodating space from the middle frame; an exciter fixed to the side of the fixed wall close to the screen; and a first piezoelectric sheet and a second piezoelectric sheet that are accommodated in the accommodating space and mounted on the rear cover spaced apart from each other. The exciter drives the screen to vibrate and produce sound. The first piezoelectric sheet senses the vibration of the rear cover and generates a voltage signal. The second piezoelectric sheet generates reverse vibration according to the voltage signal. The reverse vibration driving the rear cover to vibrate and the vibration of the rear cover driven by the exciter have opposite directions and identical magnitude, and are used for counteracting the vibration that is transmitted by the exciter to the rear cover by means of the fixed wall, so as to make the rear cover stationary. Compared with the related art, the mobile terminal in the present invention has small shell vibration and good user experience.

Description

移动终端mobile terminal 技术领域technical field

本发明涉及电声转换领域，尤其涉及一种移动终端。 The invention relates to the field of electro-acoustic conversion, in particular to a mobile terminal.

背景技术Background technique

随着移动互联网时代的到来，智能移动设备的数量不断上升。而在众多移动设备之中，手机无疑是最常见、最便携的移动终端设备。目前，手机的功能极其多样，其中之一便是高品质的音乐功能，因此，用于播放声音的发声器件被大量应用到现在的智能移动设备之中。随着功能的升级，移动终端的体积有限，则硬件需要断的优化体积，于是出现在通过激励器驱动屏幕发声以替代发声器件发声的结构。With the advent of the mobile Internet era, the number of smart mobile devices continues to rise. Among many mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. At present, the functions of mobile phones are extremely diverse, one of which is the high-quality music function. Therefore, sound-generating devices for playing sound are widely used in smart mobile devices. With the upgrade of functions, the volume of the mobile terminal is limited, and the hardware needs to be optimized. Therefore, the structure of driving the screen to sound through the exciter instead of the sound-emitting device appears.

相关技术的移动终端包括壳体、盖设于所述壳体并围成收容空间的屏幕以及安装于所述收容空间内并抵接所述屏幕的激励器，通过激励器振动以驱动所述屏幕振动发声。A related art mobile terminal includes a casing, a screen covered on the casing and enclosing an accommodation space, and an exciter installed in the accommodation space and abutting against the screen, and the screen is driven by the exciter vibrating. Vibrate sound.

然而，相关技术中的移动终端通过激励器振动以驱动所述屏幕振动发声, 所述屏幕振动造成与所述屏幕相连接的所述壳体跟随振动，使用者拿者所述移动终端的设备时会感受到振动，从而使得用户的使用体验不好。However, the mobile terminal in the related art drives the screen to vibrate and emit sound by vibrating an exciter, and the screen vibration causes the casing connected to the screen to follow the vibration. Vibration will be felt, which will make the user experience bad.

因此，实有必要提供一种新的移动终端解决上述技术问题。Therefore, it is necessary to provide a new mobile terminal to solve the above technical problems.

技术问题technical problem

本发明的目的在于提供一种壳振小且用户体验好的移动终端。The purpose of the present invention is to provide a mobile terminal with small casing vibration and good user experience.

技术解决方案technical solutions

为达到上述目的，本发明提供一种移动终端，其包括中框、分别盖设于所述中框相对两侧并共同围成收容空间的屏幕和后盖、由所述中框向所述收容空间内延伸的固定壁、固定于所述固定壁靠近所述屏幕一侧的激励器以及收容于所述收容空间内且相互间隔安装于所述后盖的第一压电片和第二压电片，所述激励器驱动所述屏幕振动发声，所述第一压电片感应所述后盖的振动并产生电压信号，所述第二压电片根据所述电压信号产生反向振动，所述反向振动驱动所述后盖振动的振动方向与所述激励器带动所述后盖振动的振动方向相反且大小相等，用于抵消所述激励器通过所述固定壁传导到所述后盖的振动以使所述后盖静止。In order to achieve the above purpose, the present invention provides a mobile terminal, which includes a middle frame, a screen and a back cover that are respectively covered on opposite sides of the middle frame and jointly enclose a receiving space, and a back cover is directed from the middle frame to the receiving space. a fixed wall extending in the space, an exciter fixed on the side of the fixed wall close to the screen, and a first piezoelectric sheet and a second piezoelectric sheet that are accommodated in the accommodation space and installed on the back cover at intervals The exciter drives the screen to vibrate and sound, the first piezoelectric sheet senses the vibration of the back cover and generates a voltage signal, and the second piezoelectric sheet generates reverse vibration according to the voltage signal, so The vibration direction in which the reverse vibration drives the rear cover to vibrate is opposite and equal in magnitude to the vibration direction in which the exciter drives the rear cover to vibrate, so as to offset the conduction of the exciter to the rear cover through the fixed wall. vibration to make the back cover still.

优选的，所述激励器抵接于所述屏幕。Preferably, the exciter is in contact with the screen.

优选的，所述激励器沿所述屏幕的振动方向向所述后盖的正投影与所述第一压电片以及所述第二压电片均相互间隔设置。Preferably, the orthographic projection of the exciter to the back cover along the vibration direction of the screen, the first piezoelectric sheet and the second piezoelectric sheet are arranged at a distance from each other.

优选的，所述固定壁沿所述屏幕的振动方向向所述屏幕的正投影、所述第一压电片沿所述振动方向向所述屏幕的正投影以及所述第二压电片沿所述振动方向向所述屏幕的正投影相互间隔设置。Preferably, the orthographic projection of the fixed wall to the screen along the vibration direction of the screen, the orthographic projection of the first piezoelectric sheet to the screen along the vibration direction, and the orthographic projection of the second piezoelectric sheet to the screen Orthographic projections of the vibration directions to the screen are spaced apart from each other.

优选的，所述第二压电片位于所述后盖的中心位置。Preferably, the second piezoelectric sheet is located at the center of the back cover.

优选的，所述第二压电片的面积大于所述第一压电片的面积。Preferably, the area of the second piezoelectric sheet is larger than that of the first piezoelectric sheet.

优选的，所述移动终端还包括安装于所述收容空间内的处理器，所述处理器分别与所述第一压电片和所述第二压电片电连接，以接收和分析所述电压信号并根据该电压信号产生驱动所述第二压电片振动的驱动信号，所述第二压电片接收所述驱动信号产生所述反向振动。Preferably, the mobile terminal further includes a processor installed in the receiving space, the processor is electrically connected to the first piezoelectric sheet and the second piezoelectric sheet, respectively, to receive and analyze the The voltage signal generates a driving signal for driving the second piezoelectric sheet to vibrate according to the voltage signal, and the second piezoelectric sheet receives the driving signal to generate the reverse vibration.

优选的，所述处理器与所述激励器电连接，所述处理器驱动所述激励器产生振动。Preferably, the processor is electrically connected to the exciter, and the processor drives the exciter to generate vibration.

优选的，所述中框、所述固定壁以及所述后盖一体成型。Preferably, the middle frame, the fixed wall and the rear cover are integrally formed.

有益效果beneficial effect

与相关技术相比，本发明的移动终端通过在中框延伸形成固定壁，并将固定壁收容于收容空间内，再将激励器设置于固定壁，并将第一压电片和第二压电片间隔设置于后盖上。该结构使得激励器驱动屏幕振动时，该振动通过中框传导到后盖的第一压电片，第一压电片感应所述后盖的振动产生电压信号，设置于后盖上的第二压电片根据电压信号产生反向振动，该反向振动驱动后盖振动的振动方向与激励器带动后盖振动的振动方向相反且大小相等，用于抵消激励器通过所述固定壁传导到后盖的振动以使后盖静止，从而大幅度减弱移动终端的壳振，从而使用者拿者所述移动终端时会感受到的振动小，从而使得用户的使用体验好。Compared with the related art, in the mobile terminal of the present invention, a fixed wall is formed by extending the middle frame, and the fixed wall is accommodated in the accommodating space, and then the exciter is arranged on the fixed wall, and the first piezoelectric sheet and the second pressure The electric sheets are arranged on the back cover at intervals. This structure enables the exciter to drive the screen to vibrate, the vibration is transmitted to the first piezoelectric sheet of the back cover through the middle frame, the first piezoelectric sheet induces the vibration of the back cover to generate a voltage signal, and the second piezoelectric sheet arranged on the back cover The piezoelectric sheet generates reverse vibration according to the voltage signal. The reverse vibration drives the rear cover to vibrate in the opposite direction and equal in magnitude to the vibration direction of the exciter to drive the rear cover to vibrate. The vibration of the cover makes the back cover still, thereby greatly reducing the casing vibration of the mobile terminal, so that the user will feel less vibration when holding the mobile terminal, so that the user experience is good.

附图说明Description of drawings

为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

图1为本发明移动终端的立体结构示意图；1 is a schematic three-dimensional structure diagram of a mobile terminal of the present invention;

图2为本发明的移动终端的部分立体结构分解图；2 is an exploded view of a part of the three-dimensional structure of the mobile terminal of the present invention;

图3为沿图1中A-A线剖视图；Fig. 3 is a sectional view along line A-A in Fig. 1;

图4为图3中B所示部分的局部放大示意图。FIG. 4 is a partial enlarged schematic view of the part shown in B in FIG. 3 .

本发明的实施方式Embodiments of the present invention

下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

请同时参阅图1-4，本发明提供一种移动终端100，所述移动终端100包括中框1、固定壁2、后盖3、屏幕4、第一激励器5、第一压电片6以及第二压电片7。所述移动终端100可为手机、平板电脑、电话手表等。1-4, the present invention provides a mobile terminal 100, the mobile terminal 100 includes a middle frame 1, a fixed wall 2, a back cover 3, a screen 4, a first exciter 5, and a first piezoelectric sheet 6 and the second piezoelectric sheet 7 . The mobile terminal 100 may be a mobile phone, a tablet computer, a phone watch, or the like.

所述中框1呈环状中空结构。所述屏幕4和所述后盖3分别盖设于所述中框1相对两侧。所述中框1、所述屏幕4以及所述后盖3共同围成收容空间10。The middle frame 1 has an annular hollow structure. The screen 4 and the back cover 3 are respectively covered on opposite sides of the middle frame 1 . The middle frame 1 , the screen 4 and the back cover 3 together form an accommodation space 10 .

所述固定壁2由所述中框1向所述收容空间10内延伸形成。所述固定壁2与所述后盖3间隔设置。所述固定壁2用于安装所述激励器5。The fixed wall 2 is formed by extending from the middle frame 1 into the receiving space 10 . The fixed wall 2 is spaced apart from the rear cover 3 . The fixed wall 2 is used for mounting the exciter 5 .

所述屏幕4盖设于所述中框1。所述屏幕4可以为不同种类屏幕，如OLED硬屏、软屏及LCD等。The screen 4 is covered on the middle frame 1 . The screen 4 can be different types of screens, such as OLED hard screen, soft screen and LCD.

本实施方式中，所述中框1、所述固定壁2以及所述后盖3一体成型，该结构有利于所述移动终端100易于装配，并使得所述移动终端100结构坚固并有利于激励器5和所述第二压电片7对移动终端100的壳振的调节。In this embodiment, the middle frame 1 , the fixed wall 2 and the back cover 3 are integrally formed. This structure facilitates easy assembly of the mobile terminal 100 , and makes the mobile terminal 100 sturdy and conducive to excitation. Adjustment of the shell vibration of the mobile terminal 100 by the device 5 and the second piezoelectric sheet 7 .

所述激励器5用于产生振动驱动所述屏幕4发声。所述激励器5安装于所述收容空间10内。具体的，所述激励器5固定于所述固定壁2靠近所述屏幕4的一侧。The exciter 5 is used to generate vibration to drive the screen 4 to sound. The exciter 5 is installed in the receiving space 10 . Specifically, the exciter 5 is fixed on the side of the fixed wall 2 close to the screen 4 .

本实施方式中，所述第一激励器5抵接于所述屏幕4。也就是说，所述激励器5夹设于所述固定壁2和所述屏幕4之间。所述激励器5抵接于所述屏幕4并通过振动驱动所述屏幕4发声。当然，不限于此，所述激励器5还可以为一体式器件设置于所述固定壁2，并与所述屏幕4间隔设置，该结构通过所述激励器5驱动所述固定壁2振动，通过所述固定壁2振动依次传导至所述中框1和所述屏幕4，从而实现驱动所述屏幕4发声也是可以的。In this embodiment, the first exciter 5 is in contact with the screen 4 . That is, the exciter 5 is sandwiched between the fixed wall 2 and the screen 4 . The exciter 5 is in contact with the screen 4 and drives the screen 4 to emit sound through vibration. Of course, it is not limited to this, and the exciter 5 can also be an integrated device disposed on the fixed wall 2 and spaced from the screen 4. This structure drives the fixed wall 2 to vibrate through the exciter 5, It is also possible to drive the screen 4 to emit sound through the vibration of the fixed wall 2 being transmitted to the middle frame 1 and the screen 4 in turn.

所述第一压电片6安装于所述收容空间10内。具体的，所述第一压电片6固定于所述后盖3。The first piezoelectric sheet 6 is installed in the receiving space 10 . Specifically, the first piezoelectric sheet 6 is fixed to the rear cover 3 .

所述第一压电片6感应所述后盖3的振动并产生电压信号。在所述激励器5驱动所述屏幕4发声时，不可以避免的情况是：激励器5振动依次传导至所述中框1和所述后盖3，从而引起所述移动终端100的壳振。这时用户拿者所述移动终端100时会感受到的振动。所述移动终端100振动时，具体的，所述后盖3振动时，所述后盖3带动所述第一压电片6变形。由于所述第一压电片6的器件性质，其变形导致在所述第一压电片6的两端产生一定的电压，所述第一压电片6的变形越大，所述第一压电片6两端产生的电压越大，即形成所述电压信号。The first piezoelectric sheet 6 senses the vibration of the back cover 3 and generates a voltage signal. When the exciter 5 drives the screen 4 to emit sound, it is inevitable that the vibration of the exciter 5 is transmitted to the middle frame 1 and the back cover 3 in turn, thereby causing the casing of the mobile terminal 100 to vibrate. . At this time, the user will feel the vibration when holding the mobile terminal 100 . When the mobile terminal 100 vibrates, specifically, when the back cover 3 vibrates, the back cover 3 drives the first piezoelectric sheet 6 to deform. Due to the device properties of the first piezoelectric sheet 6, its deformation causes a certain voltage to be generated at both ends of the first piezoelectric sheet 6. The greater the deformation of the first piezoelectric sheet 6, the greater the The greater the voltage generated across the piezoelectric sheet 6 is, the voltage signal is formed.

所述第二压电片7安装于所述收容空间10内。具体的，所述第二压电片7固定于所述后盖3。其中，所述第二压电片7与所述第一压电片6间隔设置。The second piezoelectric sheet 7 is installed in the receiving space 10 . Specifically, the second piezoelectric sheet 7 is fixed to the rear cover 3 . Wherein, the second piezoelectric sheet 7 and the first piezoelectric sheet 6 are arranged at intervals.

所述第二压电片7根据所述电压信号产生反向振动。所述反向振动驱动所述后盖3振动的振动方向与所述激励器5带动所述后盖3振动的振动方向相反且大小相等，用于抵消所述激励器5通过所述固定壁2传导到所述后盖3的振动以使所述后盖3静止。也就是说所述第二压电片7产生的振动与所述激励器5产生的振动在所述后盖3是相反的，即可以相互抵消的。该结构使得所述第二压电片7产生与所述激励器5产生的振动对应的抑制振动，从而大幅度减弱所述移动终端100的壳振。从而使用者拿者所述移动终端100时会感受到的振动小，从而使得用户的使用体验好。The second piezoelectric sheet 7 generates reverse vibration according to the voltage signal. The vibration direction in which the reverse vibration drives the rear cover 3 to vibrate is opposite and equal in magnitude to the vibration direction in which the exciter 5 drives the rear cover 3 to vibrate, which is used to offset the passage of the exciter 5 through the fixed wall 2 . The vibrations are transmitted to the rear cover 3 to make the rear cover 3 stationary. That is to say, the vibration generated by the second piezoelectric sheet 7 and the vibration generated by the exciter 5 are opposite to each other in the back cover 3 , that is, they can cancel each other out. This structure enables the second piezoelectric sheet 7 to generate damping vibration corresponding to the vibration generated by the exciter 5 , thereby greatly reducing the casing vibration of the mobile terminal 100 . Therefore, the vibration that the user feels when holding the mobile terminal 100 is small, so that the user's use experience is good.

为了更好的应用所述第二压电片7抵消所述激励器5产生对所述移动终端100的壳振。本实施方式中，所述激励器5沿所述屏幕4的振动方向向所述后盖3的正投影与所述第一压电片6以及所述第二压电片7均相互间隔设置，所述激励器5、所述第一压电片6以及所述第二压电片7分别设置于所述壳体1不同位置，不容易引起共振，其中，所述激励器5与所述第一压电片6的非正对设置，所述激励器5的振动不会通过所述收容空间10内的空气直接影响所述第一压电片6，而且通过所述后盖3振动触发所述第一压电片6，从而使得所述第一压电片6感应所述后盖3的振动产生所述电压信号可以准确反馈所述移动终端100的壳振状态，即所述电压信号与所述移动终端100的壳振的相关度较高。同时该结构有利所述第二压电片7与所述激励器5同时振动时，相互抵消对所述移动终端100的壳振的效果好。In order to better apply the second piezoelectric sheet 7 to cancel the shell vibration of the mobile terminal 100 generated by the exciter 5 . In this embodiment, the orthographic projection of the exciter 5 to the back cover 3 along the vibration direction of the screen 4 and the first piezoelectric sheet 6 and the second piezoelectric sheet 7 are spaced apart from each other. The exciter 5 , the first piezoelectric sheet 6 and the second piezoelectric sheet 7 are respectively arranged in different positions of the housing 1 and are not easy to cause resonance. If the piezoelectric sheet 6 is not arranged opposite to each other, the vibration of the exciter 5 will not directly affect the first piezoelectric sheet 6 through the air in the accommodation space 10 , and the vibration of the back cover 3 triggers the vibration of the first piezoelectric sheet 6 . the first piezoelectric sheet 6, so that the first piezoelectric sheet 6 senses the vibration of the back cover 3 to generate the voltage signal, which can accurately feedback the shell vibration state of the mobile terminal 100, that is, the voltage signal and the The correlation degree of the shell vibration of the mobile terminal 100 is relatively high. At the same time, this structure is advantageous in that when the second piezoelectric sheet 7 and the exciter 5 vibrate at the same time, the effect of mutually canceling the shell vibration of the mobile terminal 100 is good.

为了避免所述激励器5的振动，使得所述固定壁2在所述收容空间10内的空气直接影响所述第一压电片6。更优的，所述固定壁2沿所述屏幕4的振动方向向所述屏幕4的正投影、所述第一压电片6沿所述振动方向向所述屏幕4的正投影以及所述第二压电片7沿所述振动方向向所述屏幕4的正投影相互间隔设置。In order to avoid the vibration of the exciter 5 , the air in the receiving space 10 of the fixed wall 2 directly affects the first piezoelectric sheet 6 . More preferably, the orthographic projection of the fixed wall 2 to the screen 4 along the vibration direction of the screen 4, the orthographic projection of the first piezoelectric sheet 6 to the screen 4 along the vibration direction, and the The orthographic projections of the second piezoelectric sheets 7 to the screen 4 along the vibration direction are spaced apart from each other.

本实施方式中，所述第二压电片7位于所述后盖3的中心位置。该位置使得所述第二压电片7驱动所述后盖3的振动的幅度最大，从而作用与所述壳体1效果好，从而使得所述第二压电片7抵消所述激励器5对所述移动终端100的壳振的效果好。In this embodiment, the second piezoelectric sheet 7 is located at the center of the rear cover 3 . This position enables the second piezoelectric sheet 7 to drive the rear cover 3 with the largest vibration amplitude, so as to have a good effect on the casing 1 , so that the second piezoelectric sheet 7 cancels the exciter 5 The effect on the casing vibration of the mobile terminal 100 is good.

本实施方式中，所述第二压电片7的面积大于所述第一压电片6的面积。该设置在保证所述第一压电片6感应所述移动终端100的壳振状态的同时，可以使得所述第二压电片7抵消所述激励器5对所述移动终端100的壳振的效率更高。In this embodiment, the area of the second piezoelectric sheet 7 is larger than that of the first piezoelectric sheet 6 . This arrangement ensures that the first piezoelectric sheet 6 senses the shell vibration state of the mobile terminal 100 , and at the same time enables the second piezoelectric sheet 7 to cancel the shell vibration of the mobile terminal 100 caused by the exciter 5 more efficient.

为了更好的分析所述移动终端100的壳振状态，需要对所述电压信号进行检测和处理。因此，所述移动终端100还包括安装于所述收容空间10内的处理器8。所述处理器8分别与所述第一压电片6和所述第二压电片7电连接，以接收和分析所述电压信号并根据该电压信号产生驱动所述第二压电片7振动的驱动信号。所述第二压电片7接收所述驱动信号产生所述反向振动。In order to better analyze the shell vibration state of the mobile terminal 100, the voltage signal needs to be detected and processed. Therefore, the mobile terminal 100 further includes the processor 8 installed in the receiving space 10 . The processor 8 is respectively electrically connected with the first piezoelectric sheet 6 and the second piezoelectric sheet 7 to receive and analyze the voltage signal and generate and drive the second piezoelectric sheet 7 according to the voltage signal Vibration drive signal. The second piezoelectric sheet 7 receives the driving signal to generate the reverse vibration.

本实施方式中，所述处理器8与所述激励器5电连接。所述处理器8驱动所述激励器5产生振动。所述处理器8还可以对所述电压信号分析后，优化驱动所述激励器5的振动。即所述处理器8同时驱动所述激励器5和所述第二压电片7，从而使得所述移动终端100的壳振可以控制到一个非常小的水平，从而使得用户使用体验好。更优的是，所述处理器8还可以根据用户需求调整所述移动终端100的壳振，在一些需要振动的场景可以动态调整振动，比如跟随音乐节奏振动、告警。In this embodiment, the processor 8 is electrically connected to the exciter 5 . The processor 8 drives the exciter 5 to vibrate. The processor 8 can also optimize the vibration for driving the exciter 5 after analyzing the voltage signal. That is, the processor 8 drives the exciter 5 and the second piezoelectric sheet 7 at the same time, so that the shell vibration of the mobile terminal 100 can be controlled to a very small level, so that the user experience is good. More preferably, the processor 8 can also adjust the casing vibration of the mobile terminal 100 according to user requirements, and can dynamically adjust the vibration in some scenarios requiring vibration, such as vibrating with the rhythm of music and giving an alarm.

需要指出的是：所述激励器5、所述第一压电片6、所述第二压电片7以及所述处理器8均为本领域技术人员常用的元器件或模块，在设计使用中具体采用的型号根据实际需要进行选择，在此不做具体描述。It should be pointed out that the exciter 5, the first piezoelectric sheet 6, the second piezoelectric sheet 7 and the processor 8 are all components or modules commonly used by those skilled in the art, and are used in the design and use of The specific models used in the above are selected according to actual needs, and will not be described in detail here.

与相关技术相比，本发明的移动终端通过在中框延伸形成固定壁，并将固定壁收容于收容空间内，再将激励器设置于固定壁，并将第一压电片和第二压电片间隔设置于后盖上。该结构使得激励器驱动屏幕振动时，该振动通过中框传导到后盖的第一压电片，第一压电片感应所述后盖的振动产生电压信号，设置于后盖上的第二压电片根据电压信号产生反向振动，该反向振动驱动后盖振动的振动方向与激励器带动后盖振动的振动方向相反且大小相等，用于抵消激励器通过所述固定壁传导到后盖的振动以使后盖静止，从而大幅度减弱移动终端的壳振，从而使用者拿者所述移动终端时会感受到的振动小，从而使得用户的使用体验好。Compared with the related art, in the mobile terminal of the present invention, a fixed wall is formed by extending the middle frame, and the fixed wall is accommodated in the accommodating space, and then the exciter is arranged on the fixed wall, and the first piezoelectric sheet and the second pressure The electric sheets are arranged on the back cover at intervals. This structure enables the exciter to drive the screen to vibrate, the vibration is transmitted to the first piezoelectric sheet of the back cover through the middle frame, the first piezoelectric sheet induces the vibration of the back cover to generate a voltage signal, and the second piezoelectric sheet arranged on the back cover The piezoelectric sheet generates reverse vibration according to the voltage signal. The reverse vibration drives the rear cover to vibrate in the opposite direction and equal in magnitude to the vibration direction of the exciter to drive the rear cover to vibrate. The vibration of the cover makes the back cover still, thereby greatly reducing the casing vibration of the mobile terminal, so that the user will feel less vibration when holding the mobile terminal, so that the user experience is good.

以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。The above are only the embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these belong to the present invention. scope of protection.

Claims (9)

一种移动终端，其包括中框、分别盖设于所述中框相对两侧并共同围成收容空间的屏幕和后盖、由所述中框向所述收容空间内延伸的固定壁以及固定于所述固定壁靠近所述屏幕一侧的激励器，所述激励器驱动所述屏幕振动发声，其特征在于，所述移动终端还包括收容于所述收容空间内且相互间隔安装于所述后盖的第一压电片和第二压电片，所述第一压电片感应所述后盖的振动并产生电压信号，所述第二压电片根据所述电压信号产生反向振动，所述反向振动驱动所述后盖振动的振动方向与所述激励器带动所述后盖振动的振动方向相反且大小相等，用于抵消所述激励器通过所述固定壁传导到所述后盖的振动以使所述后盖静止。A mobile terminal includes a middle frame, a screen and a back cover that are respectively covered on opposite sides of the middle frame and together form a receiving space, a fixed wall extending from the middle frame into the receiving space, and a fixed wall. An exciter on the side of the fixed wall close to the screen, the exciter drives the screen to vibrate and sound, and it is characterized in that, the mobile terminal further comprises an exciter accommodated in the accommodation space and installed on the The first piezoelectric sheet and the second piezoelectric sheet of the back cover, the first piezoelectric sheet senses the vibration of the back cover and generates a voltage signal, and the second piezoelectric sheet generates reverse vibration according to the voltage signal , the vibration direction of the reverse vibration driving the back cover to vibrate is opposite and equal in magnitude to the vibration direction of the exciter driving the back cover to vibrate, so as to offset the transmission of the exciter to the back cover through the fixed wall. Vibration of the back cover to make the back cover stationary. 根据权利要求1所述的移动终端，其特征在于，所述激励器抵接于所述屏幕。The mobile terminal according to claim 1, wherein the exciter is abutted against the screen. 根据权利要求1所述的移动终端，其特征在于，所述激励器沿所述屏幕的振动方向向所述后盖的正投影与所述第一压电片以及所述第二压电片均相互间隔设置。The mobile terminal according to claim 1, wherein the orthographic projection of the exciter to the back cover along the vibration direction of the screen is the same as that of the first piezoelectric sheet and the second piezoelectric sheet spaced from each other. 根据权利要求1所述的移动终端，其特征在于，所述固定壁沿所述屏幕的振动方向向所述屏幕的正投影、所述第一压电片沿所述振动方向向所述屏幕的正投影以及所述第二压电片沿所述振动方向向所述屏幕的正投影相互间隔设置。The mobile terminal according to claim 1, wherein the fixed wall is an orthographic projection of the fixed wall to the screen along a vibration direction of the screen, and the first piezoelectric sheet is projected to the screen along the vibration direction. The orthographic projection and the orthographic projection of the second piezoelectric sheet along the vibration direction to the screen are spaced apart from each other. 根据权利要求1所述的移动终端，其特征在于，所述第二压电片位于所述后盖的中心位置。The mobile terminal according to claim 1, wherein the second piezoelectric sheet is located at a central position of the back cover. 根据权利要求1所述的移动终端，其特征在于，所述第二压电片的面积大于所述第一压电片的面积。The mobile terminal according to claim 1, wherein the area of the second piezoelectric sheet is larger than that of the first piezoelectric sheet. 根据权利要求1所述的移动终端，其特征在于，所述移动终端还包括安装于所述收容空间内的处理器，所述处理器分别与所述第一压电片和所述第二压电片电连接，以接收和分析所述电压信号并根据该电压信号产生驱动所述第二压电片振动的驱动信号，所述第二压电片接收所述驱动信号产生所述反向振动。The mobile terminal according to claim 1, wherein the mobile terminal further comprises a processor installed in the accommodation space, the processor is respectively connected with the first piezoelectric sheet and the second piezoelectric sheet. The electric sheet is electrically connected to receive and analyze the voltage signal and generate a driving signal for driving the second piezoelectric sheet to vibrate according to the voltage signal, and the second piezoelectric sheet receives the driving signal to generate the opposite vibration . 根据权利要求7所述的移动终端，其特征在于，所述处理器与所述激励器电连接，所述处理器驱动所述激励器产生振动。The mobile terminal according to claim 7, wherein the processor is electrically connected to the exciter, and the processor drives the exciter to generate vibration. 根据权利要求1所述的移动终端，其特征在于，所述中框、所述固定壁以及所述后盖一体成型。The mobile terminal according to claim 1, wherein the middle frame, the fixed wall and the back cover are integrally formed.
PCT/CN2020/128779 2020-09-25 2020-11-13 Mobile terminal Ceased WO2022062123A1 (en)

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