Concealed camera based on capacitive sensing and electronic equipment
By using a capacitive sensing-based hidden camera, and utilizing parallel plate capacitance and slider control chip to detect the camera position in real time, the problems of Hall sensors and limit switches are solved, and real-time control of camera lifting and lowering is achieved, improving reliability.
Patent Information
- Application Number
- CN202520312914.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-02-25
AI Technical Summary
When existing camera lifting mechanisms use Hall sensors or limit switches, the cost is high or they cannot detect anomalies in real time, leading to damage to the lifting module.
A hidden camera based on capacitive sensing is used. The camera position is detected in real time through parallel plate capacitor and slider control chip, and the lifting and lowering control of the camera is realized by limit switch.
It enables real-time detection of camera position, avoids abnormalities during the lifting process, reduces material costs, and improves reliability in complex environments.
Smart Images
Figure CN223912523U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to camera technical field especially, it relates to a hidden camera based on electric capacity response and electronic equipment. BACKGROUND
[0002] The embedded lifting camera on market mainly judges the camera to reach top or bottom through the mode of hall sensor or limit switch, microcontroller unit (MCU) receives the camera position information, and controls the camera to stop lifting action, thereby completing the function of camera lifting. Among them, when adopting the hall sensor, a magnet is often fixed on the camera, the magnet is moved when the camera lifts, the change of surrounding magnetic field is inducted through the hall sensor, the position of the camera is calculated, the camera reaches the top or bottom position judgment, and the camera is in the abnormal judgment in the lifting way, thereby realizing the lifting function. When adopting the limit switch, a limit switch is installed at the top and bottom of the movement structure of the camera, the limit switch is connected to the MCU pin, the limit switch is triggered when the camera rises to the top or falls to the bottom, thereby judging that the camera reaches the target position, and the MCU stops the lifting function.
[0003] However, the overall implementation mode cost is higher by adopting the mode of hall sensor plus magnet. When detecting the weak magnetic field change, the detection and judgment time is relatively long, and the whole mechanism is sensitive to the magnetic field change, needs to be far away from the strong magnetic environment. Although the limit switch can realize the function of camera lifting, the position of the camera cannot be detected in real time, so that the abnormality encountered by the camera in the lifting process, such as blocked rotation, cannot be judged, which may cause the damage of the lifting module. UTILITY MODEL CONTENTS
[0004] Therefore, it is necessary to provide a hidden camera based on electric capacity response and electronic equipment.
[0005] In the first aspect, the utility model provides a hidden camera based on electric capacity response, the hidden camera based on electric capacity response includes lifting camera assembly, limit switch and parallel plate capacitor, lifting camera assembly includes fixed frame, slidingly installed in the fixed frame sliding block and camera module, the camera module is fixed on the sliding block and rises to the first position or falls to the second position along with the sliding block, when the sliding block falls to the second position, the sliding block triggers the limit switch, the parallel plate capacitor includes fixed electrode and moving electrode, the moving electrode is arranged on the sliding block, the fixed electrode and moving electrode are oppositely arranged and keep the interval between the moving electrode unchanged, when the sliding block moves to different positions, the capacitance between the fixed electrode and the moving electrode is different.
[0006] Further, the camera module comprises a mainboard, and the limit switch is arranged on the mainboard.
[0007] Further, the slider corresponds to a position of the limit switch and is provided with a protrusion, and the limit switch is flush with the mainboard, or the limit switch protrudes from the mainboard, and one side of the slider facing the limit switch is a plane.
[0008] Further, the fixed electrode is arranged on a flexible flat cable, and a part of the flexible flat cable provided with the fixed electrode is arranged along a movement direction of the camera module.
[0009] Further, the fixed electrode comprises a plurality of key electrodes, and the plurality of key electrodes are arranged on the flexible flat cable in a straight line.
[0010] Further, the fixed electrode comprises at least three pads, a first pad and a last pad are connected to form a key electrode, and a pad between the first pad and the last pad corresponds to a key electrode.
[0011] Further, the hidden camera based on capacitive sensing further comprises a slider control chip, the slider control chip is electrically connected with the plurality of key electrodes, is used for detecting a capacitance between the moving electrode and the fixed electrode and sending the capacitance to the mainboard, and the mainboard determines a position of the camera according to the capacitance.
[0012] Further, the hidden camera based on capacitive sensing further comprises a motor, the motor is in communication connection with the mainboard, is used for controlling the motor according to the capacitance detected by the slider control chip, so as to control lifting of the camera module.
[0013] Further, one end of the flexible flat cable is attached to the mainboard, is bent on the mainboard, is arranged perpendicularly to the mainboard and is arranged in parallel to the slider.
[0014] In the second aspect, the utility model embodiment provides an electronic equipment, the electronic equipment includes a host computer and the above-mentioned hidden camera based on capacitive sensing arranged on the host computer.
[0015] The above-mentioned hidden camera based on capacitive sensing and electronic equipment can detect the position of the camera in real time through the change of the capacitance, can find the abnormality in the lifting process in time, such as locked-rotor and the like, and avoid damaging the lifting module. Meanwhile, the hidden camera based on capacitive sensing is not sensitive to the change of the magnetic field, does not need to be far away from the strong magnetic environment, and does not need to use the Hall sensor and the magnet which are easily affected by the change of the magnetic field, improves the reliability of the camera in the complex environment, and reduces the material cost. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.
[0017] Figure 1 The first perspective view of the hidden camera based on the capacitive sensing provided for the first embodiment of the present application.
[0018] Figure 2 The second perspective view of the hidden camera based on the capacitive sensing provided for the first embodiment of the present application.
[0019] Figure 3 The perspective view of the hidden camera based on the capacitive sensing provided for the second embodiment of the present application.
[0020] Figure 4 The structural schematic diagram of the slider control chip provided for the embodiment of the present application.
[0021] Figure 5 The logic block diagram of the hidden camera based on the capacitive sensing provided for the embodiment of the present application.
[0022] Figure 6 The structural schematic diagram of the electronic device applying the hidden camera based on the capacitive sensing provided for the embodiment of the present application.
[0023] Element number
[0024] Electronic device-1000 Parallel plate capacitor-3
[0025] Hidden camera based on capacitive sensing-100 Fixed electrode-31
[0026] Host-200 Key electrode-310
[0027] Lifting camera assembly-1 First solder pad-311
[0028] Fixed frame-11 Solder pad-312
[0029] Slider-12 Tail solder pad-313
[0030] Projection-121 Moving electrode-32
[0031] Camera module-13 Flexible flat cable-4
[0032] Mainboard-14 Slider control chip-5
[0033] Limit switch-2 motor-6
[0034] The purposes, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION
[0035] In the description of the present application, it is to be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the drawings described, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0036] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.
[0037] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0038] In order to make the content of the present application more clearly and more accurately understood, the present application will be described in detail with reference to the accompanying drawings. The drawings show examples of embodiments of the present application, wherein the same reference numerals represent the same elements. It can be understood that the proportions shown in the drawings of the present application are not the proportions actually implemented by the present application, but are only for the purpose of illustration, and are not drawn according to the original size.
[0039] The application provides a hidden camera 100 based on capacitive sensing. The hidden camera 100 based on capacitive sensing comprises a lifting camera assembly 1, a limit switch 2 and a parallel plate capacitor 3. The lifting camera assembly 1 comprises a fixed frame 11, a sliding block 12 and a camera module 13. The sliding block 12 is slidingly installed on the fixed frame 11. The camera module 13 is fixed on the sliding block 12 and rises to a first position or falls to a second position with the sliding block 12. In the application, the first position and the second position can be used to define the lifting path of the camera module 13. The camera module 13 comprises a mainboard 14. The limit switch 2 is arranged on the mainboard 14.
[0040] The parallel plate capacitor 3 comprises a fixed electrode 31 and a moving electrode 32. The moving electrode 32 is arranged on the sliding block 12, and the fixed electrode 31 is arranged on the fixed frame 11. Specifically, the fixed electrode 31 is arranged on a flexible flat cable 4. One end of the flexible flat cable 4 is attached to the mainboard 14 through a flat cable connector, and is arranged perpendicularly to the mainboard 14 after being bent on the mainboard 14, and is arranged in parallel with the sliding block 12. The part of the flexible flat cable 4 where the fixed electrode 31 is arranged is placed along the moving direction of the camera module 13. The fixed electrode 31 comprises a plurality of key electrodes 310. The plurality of key electrodes 310 are arranged in a straight line on the flexible flat cable 4, and the plurality of key electrodes 310 are pre-grounded. The fixed electrode 31 further comprises at least three pads, namely at least a first pad 311, a tail pad 313 and at least one pad 312. The first pad 311 and the tail pad 313 are connected to form a key electrode 310, and the pad 312 between the first pad 311 and the tail pad 313 corresponds to a key electrode 310.
[0041] The fixed electrode 31 and the moving electrode 32 are oppositely arranged and keep the same interval between the fixed electrode 31 and the moving electrode 32. It can be understood that, since the interval between the fixed electrode 31 and the moving electrode 32 is constant, the capacitance between the fixed electrode 31 and the moving electrode 32 is affected by the opposite area of the fixed electrode 31 and the moving electrode 32. When the sliding block 12 drives the camera module 13 to different positions, the opposite area of the fixed electrode 31 and the moving electrode 32 will also change. Therefore, when the sliding block 12 moves to different positions, the capacitance between the fixed electrode 31 and the moving electrode 32 is different. Further, the application can determine the position of the camera module 13 on the moving path according to the capacitance between the fixed electrode 31 and the moving electrode 32.
[0042] Further, the hidden camera 100 based on the capacitive sensing further comprises a slider control chip 5 and a motor 6. The slider control chip 5 is electrically connected with the plurality of key electrodes 310 by connecting the plurality of key electrodes 310 with corresponding pins of the slider control chip 5, for detecting the capacitance between the moving electrode 32 and the fixed electrode 31 and sending the capacitance to the mainboard 14. The mainboard 14 determines the position of the camera according to the capacitance. The motor 6 is in communication connection with the mainboard 14. The mainboard 14 controls the motor 6 according to the capacitance detected by the slider control chip 5, so as to control the lifting of the camera module 13.
[0043] When the slider 12 is lowered to the second position, the slider 12 triggers the limit switch 2 to limit the camera module 13. The triggering mode between the slider 12 and the limit switch 2 will be described in detail in different embodiments.
[0044] Please refer to Figure 1 and Figure 2 , Figure 1 and Figure 2 which illustrate the first embodiment of the hidden camera 100 based on the capacitive sensing in different views. In the first embodiment, the slider 12 is provided with a protrusion 121 corresponding to the position of the limit switch 2. The limit switch 2 is flush with the mainboard 14, and the limit switch 2 is pre-connected with the detection foot provided on the mainboard 14. When the slider 12 is lowered to the second position, the protrusion 121 contacts the limit switch 2 to generate a signal triggering the limit switch 2, and the mainboard 14 receives the signal to obtain the information that the camera module 13 has reached the second position.
[0045] Please refer to Figure 3 which is a perspective view of the hidden camera based on the capacitive sensing provided by the second embodiment of the utility model. In order to facilitate the understanding of the differences between the technical solutions of different embodiments, Figure 3 The fixed frame 11 and the solder pad on the fixed electrode 31 are omitted.
[0046] The difference between the second embodiment and the first embodiment is the arrangement mode between the limit switch 2 and the slider 12. Specifically, in the second embodiment, the limit switch 2 protrudes from the mainboard 14, and the side of the slider 12 facing the limit switch 2 is a plane. When the slider 12 is lowered to the second position, the part of the limit switch 2 protruding from the mainboard 14 contacts the slider 12 to generate a signal triggering the limit switch 2, and the mainboard 14 receives the signal to obtain the information that the camera module 13 has reached the second position.
[0047] Please refer to Figure 6The application provides a structure schematic diagram of an electronic device using a hidden camera based on capacitive sensing. The application also provides an electronic device 1000. The electronic device 1000 comprises a host 200 and a hidden camera based on capacitive sensing 100 arranged on the host 200. The specific features of the hidden camera based on capacitive sensing 100 have been described in the foregoing, and are not described herein. In the application, the second position is the initial position of the camera module 13 in the hidden camera based on capacitive sensing 100, and the second position is below the first position. The host 200 can selectively control the lifting camera 100 to enter an opening process or a closing process. The working process of the hidden camera based on capacitive sensing 100 in the electronic device 1000 will be described in detail below.
[0048] When the host 200 controls the lifting camera 100 to enter the opening process, first, the host 200 detects whether the camera module 13 is located at the initial position through the limit switch 2. When the camera module 13 is not at the initial position, the host 200 controls the camera module 13 to reach the initial position through the motor 6. After controlling the camera module 13 to enter the working mode, the host 200 acquires the working signal of the camera module and sends it to the mainboard 14. After receiving the working signal, the mainboard 14 controls the motor 6 to drive the camera module 13 to start moving upward to the first position. At this time, the moving electrode 32 also rises, the facing area between the moving electrode 32 and the fixed electrode 31 changes, causing the parallel plate capacitor 3 to change. The slider control chip 5 detects the continuously changing capacitor between the moving electrode 32 and the fixed electrode 31 and sends it to the mainboard 14. The mainboard 14 converts the changing capacitor into the position information of the camera module 13. When the host 200 detects that the camera module 13 reaches the first position on the moving path, the mainboard 14 controls the motor 6 to stop driving the camera module 13 to move, and sends the position information to the host 200. At this time, the host 200 opens other modules of the camera module 13 to perform corresponding operations, and thus the opening process of the lifting camera 100 is completed.
[0049] When the host 200 controls the lifting camera 100 to enter the closing process, the host 200 generates a closing instruction by closing the camera module 13 through the bus and sends it to the mainboard 14. The mainboard 14 controls the motor 6 to retract the camera module 13 from the first position to the second position. The mainboard 14 monitors the position of the camera module 13 on the moving path in real time through the slider control chip 5. When the camera is retracted to the second position, the mainboard 14 controls the motor 6 to stop driving the camera module 13 to move, and thus the closing process of the lifting camera 100 is completed.
[0050] In the above embodiment, the camera position is detected in real time through the capacitance change, the abnormality in the lifting process, such as the locked-rotor problem, can be found in time, and the lifting module is prevented from being damaged. Meanwhile, the hidden camera based on the capacitance induction is not sensitive to the magnetic field change, does not need to be far away from the strong magnetic environment, and does not need to use the Hall sensor and the magnet which are easily affected by the magnetic field change, the reliability of the camera in the complex environment is improved, and the material cost is reduced.
[0051] Obviously, those skilled in the art can make various modifications and changes to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and changes of the present application belong to the scope of the claims of the present application and the equivalent technology, the present application also intends to include these modifications and changes.
[0052] The above-mentioned is only the preferred embodiment of the present application, and of course cannot limit the scope of the present application, therefore, the equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.
Claims
1. A hidden camera based on capacitive sensing, characterized in that, The hidden camera based on capacitive sensing comprises: a lifting camera assembly comprising a fixed frame, a sliding block slidingly mounted on the fixed frame, and a camera module fixed to the sliding block and rising to a first position or descending to a second position with the sliding block; a limit switch triggered by the sliding block when the sliding block descends to the second position; and a parallel plate capacitor comprising a fixed electrode and a moving electrode, the moving electrode being arranged on the sliding block, the fixed electrode and the moving electrode being oppositely arranged and keeping the interval between the fixed electrode and the moving electrode unchanged, the capacitance between the fixed electrode and the moving electrode being different when the sliding block moves to different positions.
2. The capacitive sensing based hidden camera of claim 1, wherein, The camera module comprises a mainboard, and the limit switch is arranged on the mainboard.
3. The capacitive sensing based hidden camera of claim 2, wherein, The sliding block is provided with a protrusion corresponding to the position of the limit switch, and the limit switch is flush with the mainboard, or the limit switch protrudes from the mainboard, and the side of the sliding block facing the limit switch is a plane.
4. The capacitive sensing based hidden camera of claim 2, wherein, The fixed electrode is arranged on a flexible flat cable, and the part of the flexible flat cable provided with the fixed electrode is placed along the movement direction of the camera module.
5. The capacitive sensing based hidden camera of claim 4, wherein, The fixed electrode comprises a plurality of key electrodes, and the plurality of key electrodes are arranged on the flexible flat cable in a straight line.
6. The capacitive sensing based hidden camera of claim 5, wherein, The fixed electrode comprises at least three pads, the first and last pads are connected to form a key electrode, and the pads between the first and last pads correspond to a key electrode.
7. The capacitive sensing based hidden camera of claim 5, wherein, The hidden camera based on capacitive sensing further comprises a sliding block control chip, the sliding block control chip is electrically connected with the plurality of key electrodes, and is used for detecting the capacitance between the moving electrode and the fixed electrode and sending the capacitance to the mainboard, and the mainboard determines the position of the camera according to the capacitance.
8. The capacitive sensing based hidden camera of claim 7, wherein, The hidden camera based on capacitive sensing further comprises a motor, the motor is in communication connection with the mainboard, and is used for controlling the motor according to the capacitance detected by the sliding block control chip to control the lifting of the camera module.
9. The capacitive sensing based hidden camera as claimed in claim 4, wherein, One end of the flexible flat cable is attached to the mainboard, and is arranged perpendicularly to the mainboard after being bent on the mainboard and parallel to the sliding block.
10. An electronic device, comprising: The electronic device comprises a host and the hidden camera based on capacitive sensing as claimed in any one of claims 1-9 arranged on the host.