WO2021127921A1

WO2021127921A1 - Camera device and electrode apparatus

Info

Publication number: WO2021127921A1
Application number: PCT/CN2019/127630
Authority: WO
Inventors: 吴龙兴; 马杰; 刘柯佳; 周帅宇; 李子昂; 王尧
Original assignee: 诚瑞光学(常州)股份有限公司
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2021-07-01

Abstract

A camera device and an electronic apparatus. The electronic apparatus comprises the camera device. The camera device comprises a lens module, a screw rod, a push block, a driving mechanism connected to the screw rod, a transmission assembly, and a detection assembly; the push block is sleeved on the screw rod, can move along the axial direction of the screw rod, and is in threaded fit with the screw rod; the transmission assembly is connected to the push block and the lens module so as to drive the lens module to make linear movement; the detection assembly is configured to detect the position of the lens module, and comprises a magnetic circuit system and a Hall element arranged at a fixed position; the magnetic circuit system comprises magnetic steel and a magnetic conductive plate having a magnetic conductive body and several protrusions protruding from the magnetic conductive plate body; the magnetic steel rotates along with the lead screw; when the magnetic conductive body is sleeved on the magnetic steel and rotates along with the magnetic steel and the screw rod drives the protrusions to rotate, the intensity of the magnetic field at the Hall element changes along with the rotation angle; the position state of the lens module can be determined by means of the change in the intensity of the magnetic field; real-time position feedback is carried out when the lens module encounters an obstacle or an external force changes the state of the lens module.

Description

Camera and electronic equipment

Technical field

The present invention relates to the field of imaging technology, and in particular to an imaging device and electronic equipment.

Background technique

With the development of the Internet era, the application of smart electronic products has been greatly expanded. Intelligent electronic products have rich and diverse functions and are deeply loved by users. Among the many practical functions of smart electronic products, the shooting function has been greatly applied and penetrated into all aspects of life, such as taking pictures, scanning payments, and videos. Therefore, the camera is an indispensable part of any smart electronic product. However, setting a camera on a smart electronic product requires a camera hole on the body. This setting has a certain impact on the current smart electronic product's pursuit of a full-screen design.

In order to better realize the pursuit of comprehensive screen design for smart electronic products, the applicant provides a liftable camera module, which can be hidden in the fuselage when the camera is not needed, and can be extended out of the fuselage when it is needed. And can be rotated to adjust the shooting angle. This solution can avoid opening a camera hole on the fuselage, truly realize a full screen, and meet customer needs.

However, when the applicant uses the above-mentioned liftable camera module, it is found that the lens of the camera device encounters foreign object obstacles, artificial external force tension and compression, and twisting during the lifting or rotating process, which will cause the lens to extend and rotate the position cannot be accurate. Positioning further affects the normal lifting, rotation, and recovery and resetting of the camera device, and in severe cases can cause damage to the camera device, shorten the working life, and affect its reliability.

Therefore, it is necessary to provide an imaging device that can overcome the above-mentioned problems.

technical problem

The first object of the present invention is to provide a camera device which can feed back the position state of the lens module in real time.

Technical solutions

The technical scheme of the present invention is as follows:

A camera device includes:

Lens module

Screw

A push block is sleeved on the screw rod and can move along the axial direction of the screw rod, and the push block is provided with a threaded hole that is threadedly matched with the screw rod;

A driving mechanism connected to one end of the screw to drive the screw to rotate;

A transmission component connected to the push block and the lens module to drive the lens module to move linearly;

The detection component is used to detect the position of the lens module, the detection component includes a magnetic circuit system and a Hall element, the magnetic circuit system includes a magnetic steel and a magnetic conductive plate, and the magnetic steel is connected to the screw rod , And rotate with the screw, the magnetic conductive plate includes a magnetic conductive body sleeved on the magnetic steel and a plurality of protrusions protruding from the magnetic conductive plate body, the magnetic conductive plate follows the position When the magnetic steel rotates, the Hall element is set in a fixed position, and the fixed position satisfies that the magnetic steel can detect the magnetic circuit system within the range where the magnetic steel rotates with the screw rod. Magnetic field.

As an improvement, the plurality of protrusions are evenly spaced and distributed in the circumferential direction of the magnetic conductive plate body.

As an improvement, the camera device further includes a fixing seat provided on a side of the lens module close to the driving mechanism, the fixing seat including a bottom plate, a first side plate protruding from the bottom plate, and A second side plate protruding from the bottom plate and spaced apart from the first side plate, one end of the screw rod connected to the drive mechanism is rotatably connected to the second side plate, and the other end is connected to the first side plate. The side plate is rotatably connected, and the push block is located between the first side plate and the second side plate.

As an improvement, the Hall element is arranged on the side of the first side plate away from the second side plate, and the magnetic steel is sleeved on the screw rod and the first side plate rotates. The connected end is located on the side of the first side plate away from the second side plate.

As an improvement, the camera device further includes a guide rod, the guide rod is located on one side of the screw rod, one end of the guide rod is connected to the first side plate, and the other end is connected to the second side plate. The side plates are connected, the push block is penetrated with a guide hole, and the guide rod passes through the guide hole.

As an improvement, the camera device further includes a support, the support is connected to the lens module, and is provided with a stopper for limiting the displacement of the support, and the transmission assembly includes a support connected to the lens module. The supporting member and the pushing block are used as a connecting member for driving the supporting member and the lens module to move toward or away from the driving mechanism in a linear motion.

As an improved manner, the connecting member is a rack, the transmission assembly also drives the lens module to rotate, and the transmission assembly further includes a shaft, an elastic member, a first gear, a second gear, and a second gear. Three gears, one end of the shaft is rotatably connected to the support, and the other end is connected to the lens module, the elastic member is elastically compressed between the support and the push block, the first gear is connected to the The end of the rack that is away from the push block meshes, the third gear is coaxially arranged with the first gear, and the second gear is sleeved on the shaft and meshes with the third gear, The rack drives the first gear to rotate, the first gear drives the third gear to rotate, and the second gear meshes with the third gear to drive the lens module to rotate relative to the support Predetermined angle.

As an improvement, the elastic member is sleeved on the rack.

As an improvement, the end of the rack far away from the first gear is provided with a first boss and a second boss spaced apart from the first boss, and the side wall of the push block is provided with a recess. Groove, the part of the rack located between the first boss and the second boss is clamped in the groove.

As an improvement, the support is provided with mounting grooves for mounting the first gear, the second gear, and the third gear, and a through hole communicating with the mounting groove, and the rack One end away from the first boss is provided with a third boss, the third boss is disposed in the mounting groove, and the end of the rack away from the third boss passes through the perforation It is clamped in the groove.

As an improved manner, the support includes a support body and a fourth boss provided on a side of the support body facing the lens module, and the support body is oriented in comparison with the lens module. Both sides protrude to form the stop part, and the projection contour of the fourth boss on the support body is located within the projection contour of the lens module on the support body.

The second object of the present invention is to provide an electronic device, including a back shell with a receiving cavity and the above-mentioned camera device, the back shell includes a back plate and a wall surrounding the edge of the back plate, so The back plate and the surrounding wall enclose to form the receiving cavity, the camera device is installed in the receiving cavity, and the surrounding wall is provided with the surrounding wall communicating with the receiving cavity for the lens module Through the port.

Beneficial effect

Compared with the prior art, the present invention has the beneficial effect that when the screw drives the magnetic steel and the magnetic plate to rotate, the magnetic field intensity at the Hall element changes with the rotation angle of the protrusion, and the magnetic field intensity can be changed by changing the magnetic field intensity. Determine the rising and falling position of the lens module and/or the size of the rotation angle during rotation to determine the position of the lens module. When the lens module encounters obstacles or external forces change the state of the lens module, real-time position feedback is performed. The lens module Furthermore, self-protection actions such as recovery and reset are made to achieve the purpose of anti-pressure and anti-twist and reduce reliability risks.

Description of the drawings

FIG. 1 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention, and the camera mechanism is in an initial state at this time;

Figure 2 is an exploded view of a camera device provided by an embodiment of the present invention;

Figure 3 is an enlarged view of A in Figure 2;

Figure 4 is a schematic structural diagram of a support provided by an embodiment of the present invention;

Figure 5 is a schematic structural diagram of a push block provided by an embodiment of the present invention;

Figure 6 is an assembly diagram of a transmission assembly provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention, and the camera mechanism is in a raised state at this time;

FIG. 8 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention, and the camera mechanism is in a rotating state at this time;

FIG. 9 is a top view of an electronic device provided by an embodiment of the present invention, and the camera mechanism is in a rotating state at this time;

FIG. 10 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. At this time, the camera mechanism is in a proactive state;

FIG. 11 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. At this time, the camera mechanism is rotated 360 degrees;

FIG. 12 is a schematic diagram of the magnetic field line distribution in the assembled state of the magnetic steel and the magnetic conductive plate provided by the embodiment of the present invention.

Attached icon number:

1. Electronic equipment;

100. Back shell; 11. Back plate; 12. Enclosure; 13. Containment cavity; 14. Port.

200. Camera device; 21. Lens module; 211. Housing; 212. Camera; 22. Support; 221. Support body; 222. Fourth boss; 223. Mounting groove; 224. Perforation; 225. Stop Block; 23, fixed seat; 231, bottom plate; 232, first side plate; 233, second side plate; 24, push block; 241, main body part; 242, drive part; 243, threaded hole; 244, groove 245, guide hole; 25, screw rod; 26, drive mechanism; 261, power supply component; 262, motor; 263, reduction gear box; 27, transmission component; 271, rack; 272, shaft; 273, elastic part; 274. The first gear; 275, the second gear; 276, the third gear; 277, the first boss; 278, the second boss; 279, the third boss; 280, the through hole; 28, the detection component; 281 , Magnetic steel; 282, magnetic plate; 283, Hall element; 284, magnetic plate body; 285, protrusions; 286, magnetic circuit system; 30, guide rod.

Embodiments of the present invention

The present invention will be further described below in conjunction with the drawings and embodiments.

It should be noted that all directional indicators (such as up, down, left, right, front, back, inside, outside, top, bottom...) in the embodiments of the present invention are only used to explain that they are in a specific posture (as attached As shown in the figure below), the relative positional relationship between the components, etc., if the specific posture changes, the directional indication will also change accordingly.

It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, the element may be directly on the other element or a centering element may exist at the same time. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or an intermediate element may be present at the same time.

As shown in Figs. 1-11, an embodiment of the present invention provides an electronic device 1. The electronic device 1 can be any of a mobile phone, a tablet, a computer, a TV, and a Bluetooth speaker. This embodiment uses a mobile phone as an example for description. The electronic device 1 includes a back case 100 and a camera device 200.

The back shell 100 includes a back plate 11 and a surrounding wall 12 surrounding the edge of the back plate 11. The back plate 11 and the surrounding wall 12 enclose a receiving cavity 13, and the surrounding wall 12 is provided with a through opening 14 communicating with the receiving cavity 13.

The camera device 200 is installed in the accommodating cavity 13, and the camera device 200 includes a lens module 21, a support 22, a fixing seat 23, a push block 24, a screw 25, a driving mechanism 26, a transmission assembly 27 and a detection assembly 28.

The lens module 21 includes a housing 211 and a camera 212 installed in the housing 211. In this embodiment, the number of cameras 212 is preferably two, and they are arranged symmetrically on both sides inside the housing 211. The housing 211 and the transmission assembly 27 is connected, so that it can be expanded and rotated by the drive assembly 27, the lens module 21 can pass through the opening 14, the camera lens module 21 extends out of the receiving cavity 13 from the opening 14, and the camera 212 can be used as a rear When the lens module 21 is rotated by a predetermined angle (for example, 180°), the camera 212 can be used as the front camera 212. Therefore, there is no need to install the front camera 212, which reduces the production cost. It also enriches the functions of the lens module 21, which can enhance the user's experience. In this embodiment, the direction in which the length of the back plate 11 extends is defined as the first direction Y, and the direction in which the width of the back plate 11 is defined is defined as In the second direction X, the rotation of the lens module 21 described in this embodiment refers to the rotation of the lens module 21 around an axis parallel to the first direction Y.

As shown in FIGS. 1, 2 and 4, the support 22 is rotatably connected with the lens module 21 to support the lens module 21. The support 22 includes a support body 221 and a support body 221 that faces the lens module. On the fourth boss 222 on the side 21, the support body 221 is provided with a mounting groove 223 for installing the first gear 274, the second gear 275 and the third gear 276, and a through hole 224 communicating with the mounting groove 223. The support body 221 Compared with the lens module 21 protruding to form stop portions 225 on both sides, the projection contour of the fourth boss 222 on the support body 221 is located within the projection contour of the lens module 21 on the support body 221, and the fourth The height of the boss 222 is slightly lower than the depth of the opening 14. When the stopper 225 moves to contact the surrounding wall 12, the stopper 225 will be blocked by the surrounding wall 12 and can no longer move linearly. At this time, the lens module 21 Just pushed out of the accommodating cavity 13, the fourth boss 222 is located in the opening 14. At this time, the support 22 not only supports the lens module 21, but also prevents dust from entering the electronic device 1 and avoids the electronic device 1 The components are interfered by dust and reduce their service life.

As shown in FIG. 2, the fixing seat 23 is connected to the back plate 11 for installing the camera device 200 in the back shell 100. The fixing seat 23 is provided on the side of the support 22 away from the lens module 21, and the fixing seat 23 includes a bottom plate. 231, a first side plate 232 protruding from the bottom plate 231, and a second side plate 233 protruding from the bottom plate 231 and spaced apart from the first side plate 232.

As shown in Figures 1, 2 and 5, the pushing block 24 is located between the first side plate 232 and the second side plate 233, and the pushing block 24 moves between the first side plate 232 and the second side plate 233 to push The block 24 includes a main body portion 241 and a driving portion 242 located on one side of the main body portion 241. The main body portion 241 is provided with a threaded hole 243 that is threadedly fitted with the screw rod 25. The main body portion 241 is sleeved on the screw rod 25 and is connected to the screw rod 25 through the threaded hole 243. The screw 25 is threadedly connected, and the side wall of the driving portion 242 facing the back plate 11 away from the back plate 11 is recessed with a groove 244. Understandably, the threaded connection does not necessarily require a threaded hole 243 on the push block 24. For example, a nut is installed on the main body portion 241, and the threaded connection with the screw 25 is made through the nut.

As shown in Figures 1 and 2, one end of the screw rod 25 is rotatably connected with the first side plate 232, and the other end is rotatably connected with the second side plate 233. The push block 24 cooperates with the screw rod 25 to transform the rotational motion into linear motion.

As shown in Figures 1, 2 and 6, the driving mechanism 26 includes a power supply assembly 261, a motor 262, and a reduction box 263. One end of the screw rod 25 is connected to the motor 262 through the reduction box 263, and the motor 262 is electrically connected to the power supply assembly 261 When the motor 262 drives the screw 25 to rotate, the push block 24 will move linearly along its axial direction under the drive of the screw 25, and drive the transmission assembly 27, the support 22 and the lens module 21 to move linearly together. The reduction box 263 will reduce the speed and increase the torque of the rotation output of the motor 262, so that the screw 25 can obtain a larger torque.

The transmission assembly 27 of this embodiment is used to drive the lens module 21 up and down and is used to drive the lens module 21 to rotate relative to the support 22. In other embodiments, the transmission assembly 27 may only be used to drive the lens module 21 up and down, or The lens module 21 is driven up and down and used to drive the lens module 21 to flip relative to the support 22 to realize the tilting shooting function. The described flip of the lens module 21 relative to the support 22 means that the lens module 21 rotates parallel to the second direction X The axis is flipped. The transmission assembly 27 of this embodiment will be described in detail below. The transmission assembly 27 includes a rack 271, a shaft 272, an elastic member 273, a first gear 274, a second gear 275, and a third gear 276. The rack 271 is away from the support 22. One end of the rack 271 is provided with a first boss 277 and a second boss 278 spaced apart from the first boss 277, and the other end is provided with a third boss 279. One end of the rack 271 with the third boss 279 is set in the mounting groove 223 and meshing with the first gear 274, the other end passes through the through hole 224, and the part of the rack 271 between the first boss 277 and the second boss 278 is clamped in the groove 244 of the push block 24, The distance between the first boss 277 and the second boss 278 is slightly larger than the height of the driving portion 242. The arrangement of the third boss 279 enables the rack 271 to be restricted by the support 22 and will not fall off toward the push block 24. The elastic member 273 is a spring. The spring is sleeved outside the rack 271 and elastically compressed between the support member 22 and the push block 24, and is subjected to a pre-compression force when the spring is installed. One end of the shaft 272 is rotatably connected with the support 22, and the other end is connected with the lens module 21. The third gear 276 is arranged coaxially with the first gear 274. The second gear 275 is sleeved on the shaft 272 and is connected to the third gear 276. Engaged, the lens module 21 and the supporting member 22 are rotatably connected by a shaft 272. The shaft 272 is provided with a through hole 280 for wiring. The wiring of the lens module 21 is introduced into the electronic device 1 through the through hole 280, and the rack When the 271 and the first gear 274 move relative to each other, the first gear 274 rotates, driving the coaxially arranged third gear 276 to rotate, and the third gear 276 meshes with the second gear 275 to drive the shaft 272 to rotate, thereby driving the lens mold The group 21 rotates, so the transmission assembly 27 rotates under the drive of the push block 24 to drive the lens module 21 to rotate. Through this design method, only one motor 262 can control the two stages of expansion and rotation of the lens module 21, and there is no need to use two or more motors 262 to separately control the different stages of the lens module 21, which further reduces Cost of production.

It should be noted that the elastic member 273 does not have to be sleeved on the rack 271, it only needs to be supported between the support member 22 and the push block 24 to provide restoring force, and the elastic member 273 is sleeved on the rack 271. In order to better fix the elastic member 273 and avoid the force deviation of the elastic member 273, of course, there are many ways to fix the elastic member 273. For example, a fixed shaft can be added to fix the elastic member 273, or the elastic member 273 can be fixed on the push block 24. A spring seat is added to the support member 22 to fix the elastic member 273 respectively.

As shown in Figure 1, Figure 2 and Figure 3, the detection component 28 is used to detect the position of the lens module 21. The detection component 28 includes a magnetic circuit system 286 and a Hall element 283. The magnetic circuit system 286 includes a magnetic steel 281 and a magnetic Plate 282, the magnet 281 is connected to the screw 25 and rotates with the screw 25, the magnetic plate 282 is sleeved on the magnet 281 and rotates with the magnet 281, the Hall element 283 is set at a fixed position, and the fixed position meets Within the range where the magnet 281 rotates with the screw 25, the Hall element 283 can detect the magnetic field of the magnetic circuit system 286. In this embodiment, the Hall element 283 is arranged on the first side plate 232 away from the second side plate. On one side of 233, the magnetic steel 281 is sleeved on the end of the screw 25 and the first side plate 232 that is rotatably connected, and is located on the side of the first side plate 232 away from the second side plate 233. In other embodiments, Huo The Er element 283 can also be provided on the second side plate 233. At the same time, the magnetic steel 281 is provided on the side of the screw 25 away from the first side plate 232. The magnetic steel 281 can be provided with one or more than one. Set reasonably according to the requirements of Hall element 283.

The carriers in the Hall element 283 will move under the action of an external magnetic field, and the positive and negative charges move in opposite directions, so that the positive and negative potential difference is accumulated inside the Hall element 283 to form a voltage. Under the same working current, different magnetic induction strengths will form different The voltage, the greater the magnetic induction, the greater the voltage, and the information of the magnetic induction change can be obtained through the voltage change information of the Hall element 283.

The arrangement of the magnetic conductive plate 282 can enhance the magnetic field strength of the magnetic steel 281, reduce the accuracy requirements of the Hall element 283, thereby improving the detection accuracy. The magnetic conductive plate 282 is in a circular shape, and the magnetic conductive plate 282 includes a magnetic steel 281 sheathed The magnetic plate body 284 and several protrusions 285 protruding from the magnetic plate body 284, the magnetic field strength of the protrusions 285 is stronger than the magnetic field strength of other parts, and the magnetic field strength of the area near the protrusions 285 is constant Periodic distribution. In this way, it is more convenient for the Hall element 283 to detect. The number of protrusions 285 may be one, or there may be two or more. The magnetic conductive plate 282 of this embodiment is provided with 12 protrusions 285 and 12 protrusions. The raised portions 285 are evenly spaced in the circumferential direction of the magnetic conductive plate body 284. When the screw 25 drives the protrusion 285 to rotate, the magnetic field strength at the Hall element 283 also changes with the rotation angle of the screw 25. The change can determine the rotation angle, thereby determining the position state of the lens module 21 and real-time feedback. When the lens module 21 encounters obstacles or external forces change the lens state, it can perform self-protection actions such as recovery and reset according to the feedback information to achieve prevention The purpose of pressing and anti-twisting reduces the reliability risk.

Particularly, the shape of the magnetic conductive plate 282 may also be a strip shape. For example, when the lens module 21 only moves in a straight line up and down, the magnetic conductive plate 282 may be designed to be a strip shape.

The distribution of magnetic field lines at the magnetic conductive plate 282 and the magnetic steel 281 is shown in Figure 12. The lines in the figure are the contours of the magnetic field strength. The magnetic field lines at the magnetic conductive plate 282 and the magnetic steel 281 are represented by arrows. The denser the magnetic field lines, the greater the magnetic field strength. Strong.

As shown in FIGS. 2 and 3, the camera device 200 further includes a guide rod 30, which is located on the side of the screw 25 away from the rack 271. One end of the guide rod 30 is connected to the first side plate 232, and the other end is connected to the first side plate 232. The two side plates 233 are connected. The main body 241 is provided with a guide hole 245, the guide rod 30 passes through the guide hole 245, and the push block 24 moves linearly under the guidance of the guide rod 30, so that the camera device 200 is pushed out, retracted and rotated. More stable.

The camera device 200 of this embodiment only needs one motor 262 to provide driving force, and the cooperation of the push block 24 to compress the elastic member 273 and the transmission assembly 27 realizes the lens module 21 up and down, rotating to any position, rear camera and front camera, 360 degrees Ring shooting and other functions.

The process of pushing out, rotating and retracting the lens module 21 will be described in detail below in conjunction with the detection component 28:

Initialization calibration: before the formal feedback, the lens module 21 is raised and lowered and rotated to a specific position, and the corresponding position information calibration is completed.

Push-out process: After the motor 262 starts to work, the gearbox 263 decelerates and increases the torque and transmits it to the screw 25, so that the screw 25 rotates in one direction. The push block 24 is driven by the screw 25 to move linearly toward the port 14 to push The block 24 pushes the pre-compressed elastic member 273 toward the port 14, and the lift is transferred to the support member 22. The support member 22 drives the lens module 21 and the rack 271 to move toward the port 14. When the lens module 21 moves for a certain distance , The stop portion 225 of the support 22 is restricted and can no longer move toward the opening 14. At this time, the lens module 21 is just pushed out of the accommodating cavity 13 (as shown in FIG. 7). In this process, the rack 271 and the first A gear 274 has no relative movement, and the lens module 21 only performs linear movement without rotating movement. There is a one-to-one correspondence between the height of the lens module 21 and the rotation angle of the screw 25. Since the magnetic steel 281 and the magnetic plate 282 move with the screw 25, the rotation angle of the screw 25 is also related to the magnetic induction intensity at the Hall element 283. There is a one-to-one correspondence. The Hall element 283 can determine the rotation angle of the feedback screw 25 through the detected magnetic induction intensity change, so that the height of the lens module 21 can be determined again. In the event of an obstacle or artificial pressing, the Hall element 283 The current height is fed back in real time, and the excitation signal is suspended until the obstacle is lifted and then continues to rise, or a recovery reset signal is given to reset the lens module 21 to protect itself.

Rotation process: After the lens module 21 is pushed out of the accommodating cavity 13, the motor 262 continues to work, and the push block 24 continues to move toward the lens module 21, but because the support 22 is limited, the elastic member 273 is compressed by the push block 24, The pushing block 24 pushes the rack 271 to move toward the lens module 21. The rack 271 and the first gear 274 move relative to each other, driving the third gear 276 and the second gear 275 to rotate. The third gear 276 and the second gear 275 rotate in a horizontal direction. The rotation (that is, the direction parallel to the second direction X) is converted to the rotation about the vertical direction (that is, the direction parallel to the first direction Y), and is transmitted to the shaft 272 through the second gear 275, thereby driving the lens module 21 is rotated. The camera device 200 in the rotating state is shown in Figures 8 and 9. When the push block 24 is continuously moved to the corresponding position, the lens module 21 will rotate to the proactive state (as shown in Figure 10). 360° state (as shown in Figure 11). By controlling the driving signal of the motor 262, the lens module 21 can achieve two special functions: 1. Rotate 180°, the rear camera changes to the front shot; 2. Slow motion, rotate 360 degrees at most under normal circumstances. There is a one-to-one correspondence between the rotation angles of the lens module 21 and the screw 25. Since the magnetic steel 281 and the magnetic plate 282 also move with the screw 25, the rotation angle of the screw 25 and the magnetic induction intensity at the Hall element 283 exist There is a one-to-one correspondence. The Hall element 283 can determine the rotation angle of the screw 25 through the detected magnetic induction intensity change, thereby determining the rotation angle of the lens module 21. In case of obstacles or artificial rotation, the Hall element 283 feedbacks in real time The current rotation angle, and pause the excitation signal until the obstacle is removed, then continue to rotate or give a recovery reset signal to reset the lens module 21 for self-protection.

Hovering process after pushing out: After the lens module 21 is extended, it needs to hover to take pictures and other actions. At this time, the motor 262 is temporarily energized, and the Hall element 283 records the hovering position. When the lens module 21 is twisted by an external force, the twisting amplitude is fed back. When the twisting amplitude is greater than a predetermined value, the motor 262 is given a reset signal to perform self-protection.

Retraction process: When the motor 262 drives the screw 25 to rotate in the opposite direction, the push block 24 will move away from the opening 14 under the action of the screw 25, that is, move toward the inside of the electronic device 1. One end of the elastic member 273 and the push block 24 Perform a straight movement together, the other end still presses the support 22 against the surrounding wall 12, the push block 24 then drives the rack 271 to move away from the opening 14, and the rack 271 drives the first gear 274 to rotate in the opposite direction, driving the first gear 274 to rotate in the opposite direction. The three gears 276 and the second gear 275 rotate and are transmitted to the shaft 272 through the second gear 275, thereby driving the lens module 21 to rotate and reset. After the lens module 21 rotates and resets, the screw 25 continues to drive the push block 24 to move and push The block 24 drives the rack 271 to drive the support 22 and the lens module 21 to move away from the opening 14 and retract into the electronic device 1. During the rotation reset process and the lowering process, the working principle of the Hall element 283 is similar to the working principle of the pushing process and the rotating process, that is, recording its rotation and lowering position, and self-protection in case of obstacles or external force compression and torsion.

The electronic device 1 of the embodiment of the present invention sets a magnet 281 rotating with the screw 25 on the screw 25, and uses the Hall element 283 to sense the magnetic field strength of the magnet 281 to determine the rising and falling positions of the lens module 21 and During the rotation, the rotation angle determines the position state of the lens module 21. When the lens module 21 encounters obstacles or external forces change the state of the lens module 21, real-time position feedback is performed, and the lens module 21 then performs self-protection actions such as recycling and resetting. , To achieve the purpose of anti-pressure and anti-twist and reduce reliability risks.

The above are only the embodiments of the present invention. It should be pointed out here 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 all belong to the present invention. The scope of protection.

Claims

A camera device, characterized in that it comprises:

Lens module

Screw

A push block is sleeved on the screw rod and can move along the axial direction of the screw rod, and the push block is provided with a threaded hole that is threadedly matched with the screw rod;

A driving mechanism connected to one end of the screw to drive the screw to rotate;

A transmission component connected to the push block and the lens module to drive the lens module to move linearly;

The detection component is used to detect the position of the lens module, the detection component includes a magnetic circuit system and a Hall element, the magnetic circuit system includes a magnetic steel and a magnetic conductive plate, and the magnetic steel is connected to the screw rod , And rotate with the screw, the magnetic conductive plate includes a magnetic conductive body sleeved on the magnetic steel and a plurality of protrusions protruding from the magnetic conductive plate body, the magnetic conductive plate follows the position When the magnetic steel rotates, the Hall element is set in a fixed position, and the fixed position satisfies that the magnetic steel can detect the magnetic circuit system within the range where the magnetic steel rotates with the screw rod. Magnetic field.
The imaging device according to claim 1, wherein the plurality of protrusions are evenly spaced and distributed in the circumferential direction of the magnetic conductive plate body.
The camera device according to claim 1, wherein the camera device further comprises a fixing seat provided on a side of the lens module close to the driving mechanism, and the fixing seat comprises a bottom plate and is protruding from the The first side plate of the bottom plate and the second side plate protruding from the bottom plate and spaced apart from the first side plate, the end of the screw rod connected with the driving mechanism rotates with the second side plate The other end is connected to the first side plate in rotation, and the push block is located between the first side plate and the second side plate.
The imaging device of claim 3, wherein the Hall element is provided on a side of the first side plate away from the second side plate, and the magnetic steel is sleeved on the screw rod One end rotatably connected with the first side plate is located on the side of the first side plate away from the second side plate.
The camera device according to claim 3, wherein the camera device further comprises a guide rod, the guide rod is located on one side of the screw rod, and one end of the guide rod is connected to the first side plate The other end is connected with the second side plate, the push block is penetrated with a guide hole, and the guide rod passes through the guide hole.
The camera device according to claim 1, wherein the camera device further comprises a support member, the support member is connected to the lens module, and is provided with a stopper for limiting the displacement of the support member, The transmission assembly includes a connecting member connected to the support member and the push block to drive the support member and the lens module to move toward or away from the driving mechanism in a linear motion.
The camera device according to claim 6, wherein the connecting member is a rack, the transmission assembly also drives the lens module to rotate, and the transmission assembly further includes a shaft, an elastic member, and a second A gear, a second gear and a third gear, one end of the shaft is rotatably connected with the support, and the other end is connected with the lens module, the elastic member is elastically compressed between the support and the push block , The first gear meshes with the end of the rack far away from the push block, the third gear is arranged coaxially with the first gear, and the second gear is sleeved on the shaft, and Engaged with the third gear, the rack drives the first gear to rotate, the first gear drives the third gear to rotate, and the second gear meshes with the third gear to drive the lens The module rotates a predetermined angle relative to the support.
8. The imaging device according to claim 7, wherein the elastic member is sleeved on the rack.
8. The imaging device according to claim 7, wherein the end of the rack far away from the first gear is provided with a first boss and a second boss spaced apart from the first boss, the The side wall of the push block is provided with a groove, and the part of the rack between the first boss and the second boss is clamped in the groove.
The camera device according to claim 9, wherein the supporting member is provided with a mounting groove for mounting the first gear, the second gear, and the third gear, and the mounting groove Connected through holes, one end of the rack away from the first boss is provided with a third boss, the third boss is provided in the mounting groove, and the rack is away from the third boss One end of the table passes through the perforated card and is set in the groove.
The camera device according to claim 6, wherein the support includes a support body and a fourth boss provided on a side of the support body facing the lens module, and the support body corresponds to Compared with the projection of the lens module on both sides to form the stopper, the projection contour of the fourth boss on the support body is located in the projection of the lens module on the support body Within the outline.
An electronic device, characterized by comprising a back shell with a receiving cavity and the camera device according to any one of claims 1-11, the back shell comprising a back plate and an enclosure surrounding the edge of the back plate The back plate and the surrounding wall enclose the receiving cavity, the camera device is installed in the receiving cavity, and the surrounding wall is provided with the surrounding wall communicating with the receiving cavity for the The port through which the lens module passes.