WO2022067992A1

WO2022067992A1 - Lens transmission device and mobile terminal

Info

Publication number: WO2022067992A1
Application number: PCT/CN2020/128378
Authority: WO
Inventors: 周帅宇; 刘柯佳; 吴龙兴; 王尧
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声光电科技(常州)有限公司
Priority date: 2020-09-30
Filing date: 2020-11-12
Publication date: 2022-04-07
Also published as: CN112230363B; CN112230363A

Abstract

Provided is a lens transmission device, comprising a supporting assembly, a drive assembly, a lens module, and a piezoelectric sheet. The supporting assembly comprises a support, a lifting rotary shaft, a first guide rod, and a spring; the drive assembly is provided at an interval on the peripheral side of the supporting assembly; the drive assembly comprises a drive device, a screw, and a slider; the lens module is fixed to one end of the lifting rotary shaft; the piezoelectric sheet is clampingly fixed between the support and the first guide rod, so as to measure a pressure value of the support; if the pressure value changes, the drive device drives the screw to rotate to thereby drive the slider to move in a first direction, and the slider drives the supporting assembly and the piezoelectric sheet to move in the first direction, thereby enabling the lens module to retract in the first direction to the interior of a terminal. Compared with related technology, the lens transmission device and mobile terminal of the present invention can effectively protect a lens module, and has high reliability and good stability.

Description

Lens transmission device and mobile terminal

technical field

The present invention relates to the field of electronic equipment, in particular to a lens transmission device and a mobile terminal.

Background technique

With the development of the mobile Internet era, the number of intelligent mobile terminals continues to increase, and among many mobile terminals, mobile phones are undoubtedly the most common and portable mobile terminals. At present, the functions of mobile terminals mainly based on mobile phones are extremely diverse, one of which is the camera function. Therefore, lens modules for taking pictures and videos are widely used in existing smart mobile terminals.

As consumers' requirements for screen ratio are getting higher and higher, in order to meet the needs of consumers, a pop-up lens solution is used in the related art, and the lens module is extended or retracted from the interior of the mobile terminal by designing a transmission device. Going back to the interior of the mobile terminal, this solution enables the mobile terminal to achieve a true full screen, and has an aesthetic sense of structure.

technical problem

However, the pop-up lens solution is used in the related art. When the lens module protrudes from the inside of the mobile terminal and is squeezed by the outside, it cannot be retracted in time, which may easily cause damage to the lens module.

Therefore, it is necessary to provide a new lens transmission device and a mobile terminal to solve the above technical problems.

technical solutions

The purpose of the present invention is to provide a lens transmission device and a mobile terminal with high reliability, good stability and simple structure.

In order to achieve the above object, the present invention provides a lens transmission device, which is installed inside the mobile terminal, and the lens transmission device includes:

A support assembly, the support assembly includes a bracket, a lifting and rotating shaft, a first guide rod and a spring; the lifting and rotating shaft is fixed to the bracket and is rotatably connected with the bracket, and the axis of the lifting and rotating shaft is along the first Set in one direction; the first guide rod includes a support table located outside the bracket and a fixing rod extending from the support table toward the lens module and fixed to the bracket; the spring is sleeved on the support the first guide rod, and the top end of the spring is connected to the bracket;

a drive assembly, the drive assembly is arranged on the peripheral side of the support assembly at intervals, and the drive assembly includes a drive device, a screw rod and a slider;

The driving device is used to provide driving force;

The screw rod is extended along the first direction and is connected with the driving device, and the driving device drives the screw rod to rotate;

the sliding block is sleeved on the screw rod and forms a threaded drive connection with the screw rod, the sliding block extends to the spring in a direction perpendicular to the first direction, and is connected with the bottom end of the spring;

a lens module, the lens module is fixed on one end of the lifting and rotating shaft;

Piezoelectric sheet, the piezoelectric sheet is clamped and fixed between the bracket and the first guide rod to detect the pressure value received by the bracket; if the pressure value changes, the driving device drives The screw rotates to drive the slider to move along the first direction, and the slider drives the support assembly and the piezoelectric sheet to move along the first direction, so that the lens module moves along the first direction retracted inside the mobile terminal.

Preferably, the bracket includes a first side plate and a second side plate that are arranged at opposite intervals along the first direction, and an upper connection that is fixedly connected to the first side plate and the second side plate at the same time a board, a lower connecting board that is spaced apart from the upper connecting board and connects the first side board and the second side board, a first through hole penetrating the upper connecting board, and a hole penetrating the lower connecting board a second through hole; the upper connecting plate and the second side plate are jointly enclosed to form a receiving portion; the lifting and rotating shaft includes a lifting rod and a rotating shaft, and one end of the lifting rod extends through the first through hole to The outer side of the bracket is connected with the lens module, and the other end is abutted on the side of the lower connecting plate close to the lens module. The first direction extends and passes through the second through hole; the support table is located outside the receiving portion and is spaced apart from the second side plate, and the fixing rod is close to the first side plate by the support table. One side of the two side plates extends toward the lens module to be in contact with the upper connecting plate and fixed; the piezoelectric sheet is sleeved on the fixing rod and clamped and fixed between the support table and the first connecting plate. between the two side plates; the spring is accommodated in the accommodating portion, and is sandwiched and fixed between the upper connecting plate and the slider.

Preferably, the second side plate includes a main body portion fixedly connected with the upper connecting plate, a mounting plate bent and extended toward the driving assembly from a side of the main body portion away from the upper connecting plate, and a mounting plate extending through the the third through hole of the mounting plate; the support platform and the mounting plate are arranged at a distance from each other, the fixing rod extends through the third through hole to abut with the upper connecting plate, and the piezoelectric sheet clamps It is fixed between the support table and the mounting plate.

Preferably, the piezoelectric sheet is made of any one of piezoelectric single crystal, piezoelectric polycrystalline and organic piezoelectric material.

Preferably, the driving assembly further includes a fixing bracket, the fixing bracket includes a first plate and a second plate respectively fixed on opposite ends of the screw rod, and the first plate and the second plate are connected and connected with the Fixing plates with screws spaced apart.

Preferably, the driving assembly further comprises a second guide rod spaced apart from the screw rod and arranged in parallel, two ends of the second guide rod are respectively fixed to the first plate and the second plate, the sliding The block is sleeved on the second guide rod and forms a sliding connection.

Preferably, the driving device includes a first motor and a first reducer connected to the output end of the first motor and arranged coaxially, and the screw rod is connected to the output end of the first reducer and is coaxially arranged. axis settings.

Preferably, the driving device further includes a second motor, and the rotating shaft is connected to the output end of the second motor and is arranged coaxially.

Preferably, the driving device further includes a second reducer connected to the output end of the second motor and arranged coaxially, and the rotating shaft is connected to the output end of the second reducer and arranged coaxially .

The present invention also provides a mobile terminal, which includes a casing with a receiving space and the lens transmission device according to any one of the above-mentioned installations in the receiving space, the casing is provided with a through hole passing through the casing, and the The lens module is disposed facing the through hole, and the drive assembly pushes the lens module out of the receiving space through the through hole or retracts into the receiving space through the support assembly.

beneficial effect

Compared with the related art, in the lens transmission device and the mobile terminal of the present invention, the lens transmission device further comprises a piezoelectric sheet clamped and fixed between the bracket and the first guide rod. When the outside of the mobile terminal is subjected to a pressing force, the setting of the piezoelectric sheet can detect the pressure value generated by the lens module on the bracket in real time, and if the pressure value changes, the driving device will be triggered immediately The screw is driven to rotate to drive the slider to move in the first direction, and the slider drives the support assembly and the piezoelectric sheet to move in the first direction, so that the lens module moves along the first direction. The direction is retracted to the inside of the mobile terminal. The arrangement of this structure judges whether the lens module receives the external pressing force by detecting the change of the pressure value received by the bracket. The lens module is retracted into the interior of the mobile terminal, so as to provide timely and effective protection to the lens module, thereby improving the reliability of the lens transmission device.

Description of drawings

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:

1 is a schematic three-dimensional structure diagram of the lens transmission device of the present invention in an initial state;

FIG. 2 is a schematic three-dimensional structure diagram of the lens transmission device of the present invention in a moving state

FIG. 3 is a partial three-dimensional structural schematic diagram of the lens transmission device of the present invention in an initial state;

Fig. 4 is an enlarged view of the part shown in B in Fig. 3;

Fig. 5 is the three-dimensional structure schematic diagram of the stent of the present invention;

FIG. 6 is a schematic three-dimensional structural diagram of another embodiment of the lens transmission device of the present invention.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, 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.

Referring to FIGS. 1-5 , the present invention provides a lens transmission device 100 installed inside a mobile terminal. The lens transmission device 100 includes a support assembly 1 , a lens module 2 and a drive assembly 3 . In this embodiment, for the convenience of description, the first direction is defined as the X-axis direction in the figure.

The support assembly 1 includes a bracket 11, a lifting and rotating shaft 12, a first guide rod 13 and a spring 14;

The lifting and rotating shaft 12 is fixed to the bracket 11 and forms a rotational connection with the bracket 11, and the axis of the lifting and rotating shaft 12 is arranged along the first direction (X-axis);

The first guide rod 13 includes a support table 131 located outside the bracket 11 and a fixing rod 132 extending from the support table 131 toward the lens module 2 and fixed to the bracket 11 ;

The spring 14 is sleeved on the first guide rod 13 , and the top end of the spring 14 is connected to the bracket 11 .

The lens module 2 is fixed to one end of the lifting and rotating shaft 12 .

The drive assemblies 3 are arranged at intervals on the peripheral side of the support assembly 1 , and the drive assemblies 3 include a drive device 31 , a screw 32 and a slider 33 ;

The driving device 31 is used to provide driving force;

The screw rod 32 is extended along the first direction (X-axis) and is connected with the driving device 31, and the driving device 31 drives the screw rod 32 to rotate;

The sliding block 33 is sleeved on the screw rod 32 and forms a threaded drive connection with the screw rod 32 . The sliding block 33 extends to the spring 14 perpendicular to the first direction (X-axis), and is connected with the The bottom end of the spring 14 is connected.

It should be noted that the above-mentioned lens transmission device 100 adopts a detachable design, and the lens transmission device 100 is composed of a support component 1, a lens module 2 and a driving component 3, and the driving component 3 is perpendicular to the first direction. (X-axis) are arranged at intervals on one side of the support assembly 1, the lens module 2 is fixed to one end of the lift rod rotating shaft 12, and the slider 33 is perpendicular to the first direction ( X axis) extends to the spring 14 and is connected with the bottom end of the spring 14 . That is to say, the driving assembly 3 and the lens module 2 and the supporting assembly 1 have overlapping sections in the length direction, which makes the design of the overall length of the lens transmission device 100 more flexible and simplifies the assembly process. Interchangeability between components is strong.

When the lens transmission device 100 works, the driving device 31 drives the screw rod 32 to rotate, thereby driving the slider 33 to move along the first direction (X-axis), and the slider 33 drives the support The assembly 1 and the piezoelectric sheet 4 move along the first direction (X-axis), so that the lens module 2 extends out of the mobile terminal or retracts to the outside of the mobile terminal along the first direction (X-axis). inside the mobile terminal.

In this embodiment, the lens transmission device 100 further includes a piezoelectric sheet 4 sandwiched and fixed between the bracket 11 and the first guide rod 13 . When the lens module 2 is received outside the mobile terminal When the pressing force is applied, the setting of the piezoelectric sheet 4 can detect the pressure value of the lens module 2 on the bracket 11 in real time. If the pressure value changes, the driving device 31 is immediately triggered to drive. The screw 32 rotates to drive the slider 33 to move in the first direction, and the slider 33 drives the support assembly 1 and the piezoelectric sheet 4 to move in the first direction, thereby making the lens module 2 retracted into the mobile terminal along the first direction. The arrangement of this structure determines whether the lens module 2 receives an external pressing force by detecting the change of the pressure value received by the bracket 11 . If the pressure value changes, it means that the lens module 2 is subjected to the external pressing force. , the lens module 2 can be immediately retracted into the interior of the mobile terminal, which can effectively protect the lens module 2 in a timely manner, thereby improving the reliability of the lens transmission device 100 .

In this embodiment, the first guide rod 13 is spaced apart from the lifting and rotating shaft 12 along the first direction (X-axis) perpendicular to the first direction. The spring 14 is sleeved on the first guide rod 13 at intervals, and is sandwiched and fixed between the slider 33 and the bracket 11 . The arrangement of the first guide rod 13 effectively avoids the deflection of the spring 14 during the movement.

Specifically, the bracket 11 includes a first side plate 111 and a second side plate 112 that are arranged at opposite intervals along the first direction (X-axis) perpendicular to the first direction (X-axis), and are simultaneously connected to the first side plate 111 and the second side plate 112 . The upper connecting plate 113 to which the second side plate 112 is fixedly connected, the lower connecting plate 114 which is arranged opposite to the upper connecting plate 113 and is connected to the first side plate 111 and the second side plate 112 and penetrates through the upper connecting plate 114 . The first through hole 115 of the connecting plate 113 and the second through hole 116 passing through the lower connecting plate 114; the upper connecting plate 113 and the second side plate 112 are jointly formed to form a receiving portion 110;

The lifting and rotating shaft 12 includes a lifting rod 121 and a rotating shaft 122. One end of the lifting rod 121 extends to the outside of the bracket 11 through the first through hole 115 and is connected to the lens module 2, and the other end abuts against the lens module 2. The lower connecting plate 114 is close to the side of the lens module 2 , and the rotating shaft 122 extends and passes through the end of the lift rod 121 away from the lens module 2 along the first direction (X-axis). in the second through hole 116;

The support table 131 is located outside the receiving portion 110 and is spaced apart from the second side plate 112 . The fixing rod 132 faces the support table 131 from the side of the support table 131 close to the second side plate 112 . The lens module 2 extends in the direction to abut and fix with the upper connecting plate 113;

The piezoelectric sheet 4 is sleeved on the fixing rod 132 and sandwiched and fixed between the support table 131 and the second side plate 112 ; the spring 14 is accommodated in the accommodating portion 110 and sandwiched It is fixed between the upper connecting plate 113 and the sliding block 33 .

Further, the second side plate 112 includes a main body portion 1121 that is fixedly connected to the upper connecting plate 113 , and is bent and extended toward the driving assembly 3 from the side of the main body portion 1121 away from the upper connecting plate 113 . The mounting plate 1122 and the third through hole 1123 passing through the mounting plate 1122; the support table 131 and the mounting plate 1122 are relatively spaced apart, and the fixing rod 132 extends through the third through hole 1123 to connect with the mounting plate 1122. The upper connecting plate 113 is in contact with each other, and the piezoelectric sheet 4 is sandwiched and fixed between the support table 131 and the mounting plate 1122 .

In this embodiment, the piezoelectric sheet 4 is made of any one of piezoelectric single crystal, piezoelectric polycrystalline and organic piezoelectric material, of course, it is not limited to this.

In this embodiment, the driving assembly 3 further includes a fixing bracket 34 , and the fixing bracket 34 includes a first plate 341 and a second plate 342 respectively fixed to opposite ends of the screw rod 32 and connecting the first plate 341 and the second plate 342 and a fixing plate 343 which is spaced from the screw 32 .

The driving assembly 3 further includes a second guide rod 35 spaced apart from the screw rod 32 and arranged in parallel with the two ends of the second guide rod 35 respectively fixed to the first plate 341 and the second plate 342 , The slider 33 is sleeved on the second guide rod 35 to form a sliding connection.

The driving device 31 includes a first motor 311 and a first reducer 312 connected to the output end of the first motor 311 and arranged coaxially, and the screw 32 is connected to the output end of the first reducer 312 and arranged coaxially. The axial directions of the first motor 311 , the first reducer 312 and the screw 32 are all arranged along the first direction (X-axis).

Here, it should be noted that the purpose of setting the first reducer 312 is to convert part of the rotational speed of the first motor 311 into torsion force. As the rotational speed decreases and the torsion force increases, the rotational performance of the screw 32 is more reliable; of course, , if the torque performance of the first motor 311 can provide sufficient torque, then in other embodiments, it is also feasible not to provide the first reducer 312. When the first reducer 312 is not provided, the first motor 311 is directly fixed to the The bracket 34 is fixed, and the screw rod 32 is directly connected to the output end of the first motor 311 .

Please refer to FIG. 6 , which is a schematic three-dimensional structure diagram of another embodiment of the lens transmission device. The driving device 31 further includes a second motor 313 and a second speed reducer connected to the output end of the second motor 313 and arranged coaxially. The rotating shaft 132 is connected to the output end of the second reducer 314 and arranged coaxially. When the lens module 2 is located outside the mobile terminal, the configuration of this structure is used to drive the rotation shaft 132 to rotate and drive the lens module 2 to rotate horizontally at any position of 360°.

Here, it should be noted that the purpose of setting the second reducer 314 is to convert part of the rotational speed of the second motor 313 into torsion force. As the rotational speed decreases and the torsion force increases, the rotational performance of the elevating rotating shaft 12 is improved. Reliable; of course, if the torque performance of the second motor 313 can provide sufficient torque, in other embodiments, it is also feasible not to provide the second reducer 314. When the second reducer 314 is not provided, the second motor 313 The output end is directly connected with the rotating shaft 132 .

The present invention also provides a mobile terminal 200 (not shown in the figure), which includes a housing 201 (not shown in the figure) having a accommodating space 10 and the above-mentioned device provided in the present invention installed in the accommodating space 10 (not shown in the figure). In the lens transmission device 100 , the casing 201 is provided with a through hole 202 (not shown) passing through it, the lens module 2 is disposed facing the through hole 202 , and the drive assembly 3 passes through the support assembly 1 The lens module 2 is pushed out of the accommodating space 10 or retracted into the accommodating space 10 through the through hole 202 .

Compared with the related art, in the lens transmission device and the mobile terminal of the present invention, the lens transmission device further comprises a piezoelectric sheet clamped and fixed between the bracket and the first guide rod. When the outside of the mobile terminal is subjected to a pressing force, the setting of the piezoelectric sheet can detect the pressure value generated by the lens module on the bracket in real time, and if the pressure value changes, the driving device will be triggered immediately The screw is driven to rotate to drive the slider to move in the first direction, and the slider drives the support assembly and the piezoelectric sheet to move in the first direction, so that the lens module moves along the first direction. The direction is retracted to the inside of the mobile terminal. The arrangement of this structure judges whether the lens module receives the external pressing force by detecting the change of the pressure value received by the bracket. The lens module is retracted into the interior of the mobile terminal, so as to timely and effectively protect the lens module, thereby improving the reliability of the lens transmission device.

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

A lens transmission device, which is installed inside a mobile terminal, characterized in that the lens transmission device comprises:

A support assembly, the support assembly includes a bracket, a lifting and rotating shaft, a first guide rod and a spring; the lifting and rotating shaft is fixed to the bracket and forms a rotatable connection with the bracket, and the axis of the lifting and rotating shaft is along the first Set in one direction; the first guide rod includes a support table located outside the bracket and a fixing rod extending from the support table toward the lens module and fixed to the bracket; the spring is sleeved on the support the first guide rod, and the top end of the spring is connected to the bracket;

a drive assembly, the drive assembly is arranged on the peripheral side of the support assembly at intervals, and the drive assembly includes a drive device, a screw rod and a slider;

The driving device is used to provide driving force;

The screw rod is extended along the first direction and is connected with the driving device, and the driving device drives the screw rod to rotate;

the sliding block is sleeved on the screw rod and forms a threaded drive connection with the screw rod, the sliding block extends to the spring in a direction perpendicular to the first direction, and is connected with the bottom end of the spring;

a lens module, the lens module is fixed on one end of the lifting and rotating shaft;

Piezoelectric sheet, the piezoelectric sheet is clamped and fixed between the bracket and the first guide rod to detect the pressure value received by the bracket; if the pressure value changes, the driving device drives The screw rotates to drive the slider to move along the first direction, and the slider drives the support assembly and the piezoelectric sheet to move along the first direction, so that the lens module moves along the first direction retracted inside the mobile terminal.
The lens transmission device according to claim 1, wherein the bracket comprises a first side plate and a second side plate which are arranged at a relative interval perpendicular to the first direction, and are simultaneously connected with the first side plate. An upper connecting plate fixedly connected with the second side plate, a lower connecting plate which is arranged opposite to the upper connecting plate and connects the first side plate and the second side plate, and a lower connecting plate which penetrates through the upper connecting plate. a first through hole and a second through hole penetrating the lower connecting plate; the upper connecting plate and the second side plate are jointly surrounded to form a receiving part; the lifting and rotating shaft includes a lifting rod and a rotating shaft, the One end of the lift rod extends to the outside of the bracket through the first through hole and is connected to the lens module, and the other end abuts against the lower connecting plate on the side of the lens module, and the rotating shaft is connected by the One end of the lift rod away from the lens module extends along the first direction and passes through the second through hole; the support platform is located outside the receiving portion and is relatively spaced from the second side plate, so The fixing rod extends from the side of the support platform close to the second side plate toward the lens module to abut with the upper connecting plate and is fixed; the piezoelectric sheet is sleeved on the fixing rod and The spring is clamped and fixed between the support platform and the second side plate; the spring is accommodated in the receiving portion, and clamped and fixed between the upper connecting plate and the sliding block.
The lens transmission device according to claim 2, wherein the second side plate comprises a main body portion fixedly connected with the upper connecting plate, and is located by a side of the main body portion away from the upper connecting plate. a bending and extending mounting plate of the drive assembly and a third through hole penetrating the mounting plate; the support platform and the mounting plate are relatively spaced apart, and the fixing rod extends through the third through hole to connect with the mounting plate The upper connecting plate is in contact, and the piezoelectric sheet is sandwiched and fixed between the support table and the mounting plate.
The lens transmission device according to claim 2 or 3, wherein the piezoelectric sheet is made of any one of piezoelectric single crystal, piezoelectric polycrystalline and organic piezoelectric material.
The lens transmission device according to claim 1, wherein the driving assembly further comprises a fixing bracket, and the fixing bracket comprises a first plate and a second plate respectively fixed at opposite ends of the screw rod and connecting the first plate and the second plate respectively. A plate and the second plate are spaced apart from the screw and are provided with a fixed plate.
The lens transmission device according to claim 5, wherein the driving assembly further comprises a second guide rod spaced apart from and parallel to the screw rod, and both ends of the second guide rod are respectively fixed to the first guide rod. A plate and the second plate, the slider is sleeved on the second guide rod and forms a sliding connection.
The lens transmission device according to claim 2, wherein the driving device comprises a first motor and a first reducer connected to the output end of the first motor and arranged coaxially, and the screw rod is connected to the The output ends of the first reducer are connected and arranged coaxially.
The lens transmission device according to claim 7, wherein the driving device further comprises a second motor, and the rotating shaft is connected to the output end of the second motor and is arranged coaxially.
The lens transmission device according to claim 8, wherein the driving device further comprises a second reducer connected to the output end of the second motor and arranged coaxially, and the rotating shaft is connected to the first speed reducer. The output ends of the two reducers are connected and arranged coaxially.
A mobile terminal, characterized in that it comprises a casing with an accommodating space and the lens transmission device according to any one of claims 1-9 installed in the accommodating space; A through hole, the lens module is disposed facing the through hole, and the driving component pushes the lens module out of the receiving space through the through hole through the support component or retracts it into the receiving space .