CN216217281U - Anti-torsion camera module and electronic equipment - Google Patents

Abstract

The utility model provides an anti-torsion camera module and electronic equipment, which comprise a camera module, a circuit board, a module fixing support and a shell, wherein the camera module is arranged on the circuit board; the shell is provided with a mounting cavity; the module fixing support is arranged in the installation cavity and is installed on the circuit board, and an air gap is formed between the inner wall surface of the installation cavity and the module fixing support or heat conduction filler is filled in the air gap; the camera module is arranged on the module fixing support and is electrically connected with the circuit board through a flat cable. According to the utility model, the camera module is arranged on the module fixing support, and the module fixing support is arranged on the circuit board, so that an air gap or a heat-conducting filler is filled between the inner wall surface of the mounting cavity and the module fixing support, therefore, when the camera module body is subjected to torsion, the shell can replace the camera module body to bear torsion and deformation, the influence of the torsion on the camera module is reduced, and the movement of the camera module at spatial positions such as a light projector, an RGB camera module, an imaging module and the like due to the torsion is avoided.

Description

Anti-torsion camera module and electronic equipment

Technical Field

The utility model relates to a depth camera, in particular to an anti-torsion camera module and electronic equipment.

Background

Mobile payment has become the mainstream payment method in China. The mobile payment is popularized along with the popularization of smart phones, and along with the 4G/5G, artificial intelligence, big data and biometric identification technology tend to be mature, the mobile payment can obtain more application scenes.

As the core device of the face-brushing payment terminal, the face recognition camera module plays a very key role. At present, a relatively mature face recognition camera module adopts a structured light scheme or a TOF scheme.

Structured light three-dimensional vision is based on the principle of optical triangulation. The optical projector projects the structured light with a certain mode on the surface of the object to form a light bar three-dimensional image modulated by the surface shape of the object to be measured on the surface. The three-dimensional image is detected by a camera at another location to obtain a two-dimensional distorted image of the light bar. The degree of distortion of the light bar depends on the relative position between the optical projector and the camera and the object surface profile height. Intuitively, the displacement or offset displayed along the bar is proportional to the height of the object surface, and the kink indicates a change in plane, and the discontinuity indicates a physical gap in the surface. When the relative position between the optical projector and the camera is fixed, the three-dimensional profile of the object surface can be reproduced by the distorted two-dimensional light bar image coordinates.

The tof (time of flight) technique is a 3D imaging technique that emits measurement light from a projector and reflects the measurement light back to a receiver through a target object, thereby obtaining a spatial distance from the object to a sensor from a propagation time of the measurement light in the propagation path. Common ToF techniques include single point scanning projection methods and area light projection methods.

Along with face identification camera is more and more tending to the miniaturization, the volume of module reduces, and the problem that from this brings is that face identification makes a video recording module overall structure intensity can reduce because of the structure attenuate, when making a video recording module the depth map to face identification, can make a video recording module's torsion because face identification often, produces face identification and makes a video recording module spatial position's removal, leads to the depth map to rebuild inefficacy.

SUMMERY OF THE UTILITY MODEL

In view of the defects in the prior art, an object of the present invention is to provide an anti-torsion camera module and an electronic device.

The anti-torsion camera module provided by the utility model comprises a camera module, a circuit board, a module fixing support and a shell;

the shell is provided with a mounting cavity;

the module fixing support is arranged in the installation cavity and is installed on the circuit board, and an air gap is formed between the inner wall surface of the installation cavity and the module fixing support or heat conduction filler is filled in the air gap;

the camera module is arranged on the module fixing support and is electrically connected with the circuit board through a flat cable.

Preferably, the camera module comprises a light projector, an RGB camera module and an imaging module;

the module fixing support is provided with a light projector mounting hole, an imaging module mounting hole and an RGB camera module mounting hole;

the light projector is arranged in the light projector mounting hole, the imaging module is arranged in the imaging module mounting hole, and the RGB camera module is arranged in the RGB camera module mounting hole.

Preferably, a rear cover is further included; the rear cover is oppositely connected with the shell to seal the mounting cavity;

a first threaded hole penetrating along the thickness direction is formed in the end portion of the circuit board, a second threaded hole penetrating along the thickness direction is formed in the rear cover, and a third threaded hole opposite to the second threaded hole is formed in the shell;

the rear cover, the circuit board and the shell are connected through screws in the first threaded hole, the second threaded hole and the third threaded hole.

Preferably, fixing pieces are provided at both end portions of the rear cover or the case.

Preferably, the module fixing bracket includes a main body portion and a fixing portion;

the fixed part is fixedly connected with the shell; an air gap is formed between the main body part and the inner wall surface of the mounting cavity or heat-conducting filler is filled in the air gap;

the main body part is provided with the camera module.

Preferably, the flat cables include a first flat cable, a second flat cable and a third flat cable;

the light projector is connected with the circuit board through a first flat cable, the RGB camera module is connected with the circuit board through a second flat cable, and the imaging module is connected with the circuit board through a third flat cable.

Preferably, the light projector is configured to project a light beam towards a target object;

the imaging module is used for receiving the light beam incident after the target object is reflected and obtaining the depth image of the target object according to the light spot pattern or the phase difference of the incident light beam.

Preferably, the light projector comprises an edge-emitting laser and a light splitting device arranged on a light path;

the edge-emitting laser is used for projecting laser to the light splitting device;

the light splitting device is used for projecting the incident laser light into a plurality of discrete collimated light beams.

Preferably, the light projector comprises a laser array, a collimating lens and a beam splitting device arranged on a light path;

the laser array is used for projecting laser of a first order of magnitude to the collimating lens;

the collimating lens is used for collimating the incident multiple laser beams and then emitting collimated light beams with a first order of magnitude;

the beam splitting device is used for splitting the incident collimated light beam with the first order of magnitude to emit a collimated light beam with a second order of magnitude;

the second order of magnitude is greater than the first order of magnitude.

The electronic equipment provided by the utility model comprises the torsion-resistant camera module.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, the camera module is arranged on the module fixing support, and the module fixing support is arranged on the circuit board, so that an air gap or a heat-conducting filler is formed between the inner wall surface of the installation cavity and the module fixing support, therefore, when the camera module body is subjected to torsion, the shell can replace the camera module body to bear torsion and deformation, the influence of the torsion on the camera module is reduced, and the problem of poor depth map reconstruction effect caused by the movement of spatial positions of a light projector, an RGB camera module, an imaging module and the like due to the torsion action of the camera module is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts. Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural diagram of an anti-torsion camera module according to an embodiment of the present invention;

FIG. 2 is an exploded view of the anti-torque camera module according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of an anti-torsion camera module according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a light projector according to an embodiment of the present invention;

FIG. 5 is a schematic view of another embodiment of a light projector;

fig. 6 is a schematic structural diagram of a depth camera module according to an embodiment of the present invention.

In the figure:

1 is a shell;

2 is a module fixing bracket;

3 is a light projector;

4 is RGB camera module;

5 is an imaging module;

6 is an air gap;

7 is a circuit board;

8 is a rear cover;

301 is an edge-emitting laser;

302 is a beam projector;

303 is a laser array;

304 is a collimating lens;

305 is a beam splitting device;

501 is a photodetector array;

502 is an optical imaging lens.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the utility model. All falling within the scope of the present invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. The connection may be for fixation or for circuit connection.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be in any way limiting of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The anti-torsion camera module provided by the utility model comprises a camera module, a circuit board, a module fixing support and a shell;

the shell is provided with a mounting cavity;

the module fixing support is arranged in the installation cavity and is installed on the circuit board, and an air gap is formed between the inner wall surface of the installation cavity and the module fixing support or heat conduction filler is filled in the air gap;

the camera module is arranged on the module fixing support and is electrically connected with the circuit board through a flat cable.

According to the utility model, the camera module is arranged on the module fixing support, and the module fixing support is arranged on the circuit board, so that an air gap or a heat-conducting filler is formed between the inner wall surface of the installation cavity and the module fixing support, therefore, when the camera module body is subjected to torsion, the shell can replace the camera module body to bear torsion and deformation, the influence of the torsion on the camera module is reduced, and the problem of poor depth map reconstruction effect caused by the movement of spatial positions of a light projector, an RGB camera module, an imaging module and the like due to the torsion action of the camera module is avoided.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, so that the above is the core idea of the present invention, and the above objects, features and advantages of the present invention can be more clearly understood. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic structural view of a torsion-resistant camera module according to an embodiment of the present invention, and fig. 2 is a schematic exploded view of the torsion-resistant camera module according to the embodiment of the present invention, as shown in fig. 1 and fig. 2, the torsion-resistant camera module according to the present invention includes a rear cover 8, a camera module, a circuit board 7, a module fixing bracket 2, and a housing 1;

the shell 1 is provided with a mounting cavity;

the module fixing support 2 is arranged in the installation cavity and is installed on the circuit board 7, and an air gap 6 is formed between the inner wall surface of the installation cavity and the module fixing support 2 or heat-conducting filler is filled in the air gap;

the camera module is arranged on the module fixing support 2 and is electrically connected with the circuit board 7 through a flat cable.

The rear cover 8 is oppositely connected with the shell 1 so as to seal the mounting cavity;

a first threaded hole penetrating along the thickness direction is formed in the end portion of the circuit board 7, a second threaded hole penetrating along the thickness direction is formed in the rear cover 8, and a third threaded hole opposite to the second threaded hole is formed in the shell 1;

the rear cover 8, the circuit board 7 and the housing 1 are connected by screws located in the first threaded hole, the second threaded hole and the third threaded hole.

In the embodiment of the present invention, the camera module includes a light projector 3, an RGB camera module 4, and an imaging module 5;

the module fixing support 2 is provided with a light projector mounting hole, an imaging module mounting hole and an RGB camera module mounting hole;

the light projector 3 sets up in the light projector mounting hole, the formation of image module 5 sets up in the formation of image module mounting hole, the RGB module 4 of making a video recording sets up in the RGB module mounting hole of making a video recording.

Wherein, the light projector mounting hole the formation of image module mounting hole and the RGB makes a video recording the module mounting hole and opens in order in the main part of module fixed bolster 2.

In the embodiment of the present invention, the housing 1 and the rear cover 8 may be made of a metal plate, such as a stainless steel plate, an aluminum plate, a steel plate, or the like.

Fig. 3 is a schematic cross-sectional view of an anti-torsion camera module according to an embodiment of the utility model, and as shown in fig. 3, the camera module body 2 includes a main body portion and a fixing portion;

the fixed part is fixedly connected with the shell 1; an air gap 6 is formed between the main body part and the inner wall surface of the mounting cavity or heat-conducting filler is filled in the air gap;

the main body part is provided with the camera module. The heat-conducting filler can adopt heat-conducting glue.

Fig. 4 is a schematic diagram of a structure of a light projector according to an embodiment of the present invention, and as shown in fig. 4, the light projector 3 includes an edge-emitting laser 301 and a beam projector 302 disposed on a light path;

the edge-emitting laser 301 is used for projecting laser to the beam projector 302;

the beam projector 302 is configured to project the incident laser light into a plurality of discrete collimated beams of light onto a target object.

In an embodiment of the utility model, the inner surface of the beam splitting projector is processed with a micro-nano structured optical chip and matched with an optical lens. The beam splitting projector can perform the function of splitting incident light from the edge-emitting laser 301 into any of a plurality of collimated beams. The emission direction of the edge-emitting laser 301 and the projection direction of the beam splitting projector may be the same, or may be at 90 degrees or any angle required for the optical system design.

In an embodiment of the present invention, the beam projector 302 may also employ a diffraction grating.

Fig. 5 is a schematic diagram of another structure of a light projector according to an embodiment of the present invention, and as shown in fig. 5, the light projector 3 includes a laser array 303, a collimator lens 304, and a beam splitting device 305 disposed on a light path;

the laser array 303 is configured to project laser light of a first order of magnitude to the collimating lens 304;

the collimating lens 304 is configured to collimate the incident multiple laser beams and emit collimated light beams of a first order of magnitude;

the beam splitting device 305 is configured to split the incident collimated light beam of the first order of magnitude and emit a collimated light beam of a second order of magnitude to the target object;

the second order of magnitude is greater than the first order of magnitude.

In an embodiment of the present invention, the Laser array 303 may be formed by a plurality of Vertical Cavity Surface Emitting Lasers (VCSELs) or a plurality of Edge Emitting Lasers (EELs). The multiple laser beams can be collimated into highly parallel beams after passing through the collimating lens 304. The beam splitting device 305 may be used to achieve more collimated beams depending on the number of discrete beams required in the application. The beam splitting device 305 may employ a diffraction grating (DOE), a Spatial Light Modulator (SLM), or the like.

In an embodiment of the present invention, the small TOF camera module further includes a diffuser; the diffuser is used for diffusing the collimated light beams and enabling the collimated light beams to be subjected to floodlight emergence.

Fig. 6 is a schematic structural diagram of a depth camera module in an embodiment of the present invention, and as shown in fig. 6, the depth camera module 1 includes an optical imaging lens 502, a photodetector array 501, and a driving circuit; the photodetector array 501 includes a plurality of photodetectors distributed in an array;

the optical imaging lens 502 is configured to enable a direction vector of the collimated light beam entering the light detector array 501 through the optical imaging lens 502 to have a one-to-one correspondence with the light detectors;

the light detector is used for receiving the collimated light beam reflected by the target object;

the driving circuit is used for measuring the propagation time of the plurality of collimated light beams and further generating depth data of the surface of the target object.

To filter background noise, the optical imaging lens 502 is typically further equipped with a narrow band filter, so that the photodetector array 501 can only pass incident collimated light beams of a predetermined wavelength. The preset wavelength can be the wavelength of the incident collimated light beam, and can also be between 50 nanometers smaller than the incident collimated light beam and 50 nanometers larger than the incident collimated light beam. The photodetector array 501 may be arranged periodically or aperiodically. Each photodetector, in cooperation with an auxiliary circuit, may enable measurement of the time of flight of the collimated beam. The photodetector array 501 may be a combination of multiple single-point photodetectors or a sensor chip integrating multiple photodetectors, as required by the number of discrete collimated beams. To further optimize the sensitivity of the light detectors, the illumination spot of one discrete collimated light beam on the target object 3 may correspond to one or more light detectors. When a plurality of light detectors correspond to the same irradiation light spot, signals of each detector can be communicated through a circuit, so that the light detectors with larger detection areas can be combined.

The electronic equipment provided by the embodiment of the utility model comprises the torsion-resistant camera module. The electronic device can be a mobile phone, a tablet computer, a digital camera, a payment platform and the like.

According to the utility model, the camera module is arranged on the module fixing support, and the module fixing support is arranged on the circuit board, so that an air gap or a heat-conducting filler is formed between the inner wall surface of the installation cavity and the module fixing support, therefore, when the camera module body is subjected to torsion, the shell can replace the camera module body to bear torsion and deformation, the influence of the torsion on the camera module is reduced, and the problem of poor depth map reconstruction effect caused by the movement of spatial positions of a light projector, an RGB camera module, an imaging module and the like due to the torsion action of the camera module is avoided.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the utility model.

Claims (10)

1. An anti-torsion camera module is characterized by comprising a camera module, a circuit board, a module fixing support and a shell;

the shell is provided with a mounting cavity;

the module fixing support is arranged in the installation cavity and is installed on the circuit board, and an air gap is formed between the inner wall surface of the installation cavity and the module fixing support or heat conduction filler is filled in the air gap;

the camera module is arranged on the module fixing support and is electrically connected with the circuit board through a flat cable.

2. The torsion resistant camera module of claim 1, wherein the camera module comprises a light projector, an RGB camera module, and an imaging module;

the module fixing support is provided with a light projector mounting hole, an imaging module mounting hole and an RGB camera module mounting hole;

the light projector is arranged in the light projector mounting hole, the imaging module is arranged in the imaging module mounting hole, and the RGB camera module is arranged in the RGB camera module mounting hole.

3. The torsion resistant camera module of claim 1, further comprising a back cover; the rear cover is oppositely connected with the shell to seal the mounting cavity;

a first threaded hole penetrating along the thickness direction is formed in the end portion of the circuit board, a second threaded hole penetrating along the thickness direction is formed in the rear cover, and a third threaded hole opposite to the second threaded hole is formed in the shell;

the rear cover, the circuit board and the shell are connected through screws in the first threaded hole, the second threaded hole and the third threaded hole.

4. The torsion-resistant camera module according to claim 3, wherein fixing pieces are provided at both end portions of the rear cover or the housing.

5. The torsion resistant camera module of claim 1, wherein the module fixing bracket comprises a main body portion and a fixing portion;

the fixed part is fixedly connected with the shell; an air gap is formed between the main body part and the inner wall surface of the mounting cavity or heat-conducting filler is filled in the air gap;

the main body part is provided with the camera module.

6. The anti-torsion camera module according to claim 2, wherein the flat cables include a first flat cable, a second flat cable and a third flat cable;

the light projector is connected with the circuit board through a first flat cable, the RGB camera module is connected with the circuit board through a second flat cable, and the imaging module is connected with the circuit board through a third flat cable.

7. The torsion-resistant camera module according to claim 6,

the light projector is used for projecting light beams to a target object;

the imaging module is used for receiving the light beam incident after the target object is reflected and obtaining the depth image of the target object according to the light spot pattern or the phase difference of the incident light beam.

8. The torsion-resistant camera module according to claim 7, wherein the light projector comprises an edge-emitting laser and a light splitting device arranged on an optical path;

the edge-emitting laser is used for projecting laser to the light splitting device;

the light splitting device is used for projecting the incident laser light into a plurality of discrete collimated light beams.

9. The torsion-resistant camera module according to claim 7, wherein the light projector comprises a laser array, a collimating lens and a beam splitting device arranged on an optical path;

the laser array is used for projecting laser of a first order of magnitude to the collimating lens;

the collimating lens is used for collimating the incident multiple laser beams and then emitting collimated light beams with a first order of magnitude;

the beam splitting device is used for splitting the incident collimated light beam with the first order of magnitude to emit a collimated light beam with a second order of magnitude;

the second order of magnitude is greater than the first order of magnitude.

10. An electronic device comprising the torsion-resistant camera module according to any one of claims 1 to 9.

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