Camera module

Abstract

The present invention relates to a camera module, comprising: a housing, a lens barrel module, and an elastic component located between the lens barrel module and the housing; the elastic component undergoes elastic deformation to provide radial pressure, thereby reducing radial displacement or vibration of the lens barrel module when the lens barrel module is in a stationary state or when the lens barrel module slides axially along an optical axis.

Description

Technical Field

[0001] The present invention relates to the technical field of camera modules, and in particular to a voice coil motor structure of a camera module. Background Art

[0002] With the rapid development of the smartphone industry, people's requirements for mobile phone camera imaging effects are gradually increasing. Compared with traditional camera systems, cell phone camera modules (CCM) are widely used in various new generation portable camera devices due to their advantages such as miniaturization, low power consumption, low cost and high image quality.

[0003] At present, the structure of CCM includes lens unit, voice coil motor (VCM), infrared cut-off filter, sensor, flexible printed circuit board (FPC) or printed circuit board (PCB), and connector connected to the mobile phone motherboard. Among them, VCM is used to realize the autofocus function of the lens unit, and VCM is usually composed of magnets, coils, shrapnel and carriers. During the operation of VCM, the coil is first energized, and a magnetic field is generated after the coil is energized. The magnetic field generated in the coil acts on the magnet, and the coil moves under the action of electromagnetic force, thereby driving the lens unit connected to the VCM to move, adjusting the image distance and object distance, and presenting a clear image. Summary of the invention

[0004] The purpose of the present invention is to prevent the deviation or vibration of the lens barrel module of the camera module during axial movement, thereby improving the autofocus performance of the camera module.

[0005] In order to solve the above technical problems, the present invention provides a camera module, comprising: a housing, a lens barrel module, and an elastic component located between the lens barrel module and the housing;

[0006] The elastic component undergoes elastic deformation to provide radial pressure, thereby reducing radial deviation or vibration of the barrel module when the barrel module is in a stationary state or when the barrel module slides axially along the optical axis.

[0007] In one embodiment, the elastic components are respectively located on two adjacent sides of the shell, the elastic components are located on the inner side of the shell or on the connecting structure on the inner side of the shell or on the outer wall of the lens barrel module or on the connecting structure of the outer wall; the elastic components respectively provide radial pressure in the first direction and radial pressure in the second direction.

[0008] In one embodiment, the elastic component provides radial pressure in the first direction and radial pressure in the second direction on two corresponding sides, respectively, with sliding components, and the sliding components are located on the inner side of the housing or on the connecting structure on the inner side of the housing or on the outer wall of the lens barrel module or on the connecting structure of the outer wall;

[0009] The elastic modulus of the sliding component is greater than or equal to twice the elastic modulus of the elastic component.

[0010] In one embodiment, the elastic component is located between two adjacent sides of the shell, the elastic component is located on the inner side of the shell or on the connecting structure on the inner side of the shell or on the outer wall of the lens barrel module or on the connecting structure of the outer wall; the elastic component provides radial pressure in a third direction.

[0011] In one embodiment, a sliding component is provided on the side corresponding to the elastic component providing radial pressure in the third direction, and the sliding component is located on the inner side of the housing or on the connecting structure on the inner side of the housing or on the outer wall of the lens barrel module or on the connecting structure of the outer wall;

[0012] The elastic modulus of the sliding component is greater than or equal to twice the elastic modulus of the elastic component.

[0013] In one embodiment, the elastic component is an elastic beam structure.

[0014] In one embodiment, the sliding component is disposed on a lower side of the elastic component in a horizontal direction.

[0015] In one embodiment, a contact area is provided between the lens barrel module and the top of the housing, and the contact area is located on an upper side of the elastic component in a horizontal direction.

[0016] In one embodiment, the elastic component is provided with a mounting portion, and the elastic component is assembled to the lens barrel module through the mounting portion.

[0017] In one embodiment, the mounting portion is a buckle structure protruding from the inner side of the lens barrel module, and the buckle structure is folded to assemble the elastic component to the lens barrel module.

[0018] In one embodiment, the housing is provided with an opening, and a breathable membrane is disposed in the opening area.

[0019] In one embodiment, a dustproof film is provided on the upper portion of the lens barrel module to prevent external foreign matter from entering the interior of the camera module.

[0020] Compared with the prior art, the camera module in the present invention has the following beneficial effects:

[0021] In the present invention, an elastic component is arranged between the lens barrel module and the housing, and the elastic component is elastically deformed to provide radial pressure, thereby reducing radial displacement or vibration of the lens barrel module when the lens barrel module is stationary or when the lens barrel module slides axially along the optical axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic top view of a voice coil motor structure in one embodiment of the present invention;

[0023] Figure 2 A schematic diagram of a voice coil motor structure according to an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of an elastic component and a sliding component in one embodiment of the present invention;

[0025] Figure 4 FIG. 4 is a schematic diagram of a dustproof film according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited to the specific implementation disclosed below.

[0027] Secondly, the present invention is described in detail using schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the schematic diagrams are only examples and should not limit the scope of protection of the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the camera module of the present invention is described in detail below with reference to the accompanying drawings.

[0029] refer to Figure 1 , Figure 2 As shown, the camera module of the present invention includes: a housing 10, a lens barrel module 20 located inside the housing 10, and an elastic component 30 located between the lens barrel module 20 and the housing 10; the elastic component 30 undergoes elastic deformation to provide radial pressure, and when the lens barrel module 20 is in a stationary state or when the lens barrel module 20 slides axially along the optical axis direction (Z direction), the radial (XY plane) displacement or vibration of the lens barrel module 10 is reduced.

[0030] In one embodiment of the present invention, the housing 10 forms a cubic structure, the camera module includes two elastic components 30, and the elastic components 30 are respectively located on two adjacent sides of the housing 10, the elastic components 30 are located on the inner side of the housing 10 or on the connecting structure of the inner side of the housing 10 or on the outer wall of the lens barrel module 20 or on the connecting structure of the outer wall, the elastic components 30 respectively provide radial pressure in the first direction (X direction) and radial pressure in the second direction (Y direction), the first direction is perpendicular to the second direction, of course, in other embodiments of the present invention, there can also be an acute angle between the first direction and the second direction, and the present invention is not limited thereto. The corresponding two sides of the elastic component 30 providing radial pressure in the first direction and radial pressure in the second direction are respectively provided with sliding components 40, that is, the sliding components 40 are respectively located on the other two adjacent sides of the housing 10, and the sliding components 40 and the elastic component 30 are not on the same horizontal plane, the sliding components 40 are arranged on the lower side of the horizontal direction of 30, the sliding components 40 are located on the inner side of the housing 10 or on the connecting structure of the inner side of the housing 10 or on the outer wall of the lens barrel module 20 or on the connecting structure of the outer wall. The elastic modulus of the sliding component 40 is greater than or equal to 2 times the elastic modulus of the elastic component, for example, 3 times, 4 times, 5 times, 8 times, 10 times, and preferably 4 times.

[0031] Further, in this embodiment, elastic components are disposed on the four sides of the housing 10 of the camera module, and the elastic modulus of an adjacent pair of elastic components is the same and different from the elastic modulus of another adjacent pair of elastic components. The pair of elastic components with a small elastic modulus applies radial forces in the first direction and the second direction respectively, and the pair of elastic components with a large elastic modulus is connected to the sliding components respectively. In order to facilitate the sliding of the lens barrel module, the pair of elastic components with a small elastic modulus is also provided with a corresponding sliding component, and the elastic modulus of the sliding component is greater than or equal to twice the elastic modulus of the elastic component. Figure 3 As shown, the elastic component 30 is an elastic beam structure, the sliding component 40 has a protrusion, the elastic component 30 is pressed against the protrusion of the sliding component 40, and can slide along the protrusion. In addition, at least one sliding component is plated with a metal layer, the elastic component is in contact with the sliding component, and the sliding component provides current for powering the coil on the lens barrel module. Under the combined force of the radial force in the first direction and the radial force in the second direction of the elastic component, and the elastic modulus of the elastic component 30 is different, the lens barrel module is pressed against the sliding component, and the lens barrel module is fixed in the radial direction, thereby avoiding displacement or vibration during axial movement.

[0032] In another embodiment of the present invention, the elastic component 30 is located between two adjacent sides of the housing, that is, between the X direction and the Y direction, such as in the diagonal direction of the housing cube structure, the elastic component 30 is located on the inner side of the housing 10 or on the connecting structure of the inner side of the housing 10 or on the outer wall of the lens barrel module 20 or on the connecting structure of the outer wall, and the elastic component 30 provides radial pressure in the third direction. The corresponding side of the elastic component 30 that provides radial pressure in the third direction is provided with a sliding component 40, that is, the sliding component 40 is located on the other side opposite to the diagonal of the housing 10, and the sliding component 40 and the elastic component 30 are not on the same horizontal plane, the sliding component 40 is arranged on the lower side of 30 in the horizontal direction, the sliding component 40 is located on the inner side of the housing 10 or on the connecting structure of the inner side of the housing 10 or on the outer wall of the lens barrel module 20 or on the connecting structure of the outer wall, and the elastic modulus of the sliding component 40 is greater than or equal to 2 times the elastic modulus of the elastic component 30, for example, 3 times, 4 times, 5 times, 8 times, 10 times, and preferably 4 times.

[0033] In this embodiment, the other side opposite to the elastic component further has another elastic component, and the elastic modulus of the other elastic component is greater than that of the elastic component. Figure 3 As shown, the elastic component 30 is an elastic beam structure, the sliding component 40 has a protrusion, and the other elastic component is pressed against the protrusion of the sliding component 40 and can slide along the protrusion. Under the action of the radial force in the third direction, and the elastic modulus of the elastic components is different, the lens barrel module 20 is pressed against the sliding component, thereby avoiding displacement or vibration during axial movement.

[0034] Further, there is a contact area between the lens barrel module 20 and the top of the housing 10, and the contact area is located on the upper side of the elastic component 30 in the horizontal direction. Specifically, an elastic film (not shown in the figure) is attached to the inner wall of the top of the housing 10. During the axial movement of the lens barrel module 20, the lens barrel module 20 contacts part of the elastic film to form a contact area, and there is a gap between the other areas of the elastic film and the lens barrel module 20, so as to facilitate the sliding of the lens barrel module 20. The elastic component 30, the sliding component 40, and the contact area are not on the same horizontal plane, and form a triangular structure, so that the lens barrel module 20 is more evenly stressed and has better stability during the sliding process.

[0035] Continue to refer Figure 3 As shown, the elastic component 30 is provided with a mounting portion, and the elastic component 30 is assembled to the lens barrel module 20 by the mounting portion. Figure 2 As shown, the mounting portion is a buckle structure protruding from the inner side of the lens barrel module 30 , and the buckle structure is folded to assemble the elastic component 30 on the lens barrel module 20 .

[0036] In one embodiment of the present invention, the housing 10 is provided with an opening, and a breathable membrane is disposed in the opening area.

[0037] In one embodiment of the present invention, reference Figure 4 As shown, Figure 4 for Figure 1 In the cross-sectional view along the AA′ direction, a dustproof film 50 is provided on the upper portion of the lens barrel module 20 , and the dustproof film 50 is used to prevent external foreign matter from entering the interior of the camera module when the lens barrel module 20 slides up and down.

[0038] To sum up, in the camera module of the present invention, an elastic component is arranged between the lens barrel module and the housing, and the elastic component undergoes elastic deformation to provide radial pressure. When the lens barrel module is in a stationary state or when the lens barrel module slides axially along the optical axis, the radial displacement or vibration of the lens barrel module is reduced, thereby improving the imaging performance of the module.

[0039] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A camera module, characterized in that: include: A housing, a lens barrel module, and an elastic component located between the lens barrel module and the housing; The elastic component is elastically deformed to provide radial pressure, so as to reduce radial deviation or vibration of the lens barrel module when the lens barrel module is in a stationary state or when the lens barrel module slides axially along the optical axis. The elastic components are respectively located on two adjacent sides of the shell, the elastic components are located on the inner side of the shell or on the connecting structure of the inner side of the shell or on the outer wall of the lens barrel module or on the connecting structure of the outer wall; the elastic components respectively provide radial pressure in a first direction and radial pressure in a second direction; sliding components are respectively arranged on the opposite sides of the elastic components providing radial pressure in the first direction and radial pressure in the second direction, the sliding components are located on the inner side of the shell or on the connecting structure of the inner side of the shell or on the outer wall of the lens barrel module or on the connecting structure of the outer wall; the elastic modulus of the sliding component is greater than or equal to 2 times the elastic modulus of the elastic component; or, The elastic component is located between two adjacent sides of the housing, the elastic component is located on the inner side of the housing or on the connecting structure of the inner side of the housing, or on the outer wall of the lens barrel module or on the connecting structure of the outer wall; the elastic component provides radial pressure in a third direction; a sliding component is provided on the opposite side of the elastic component providing radial pressure in the third direction, the sliding component is located on the inner side of the housing or on the connecting structure of the inner side of the housing, or on the outer wall of the lens barrel module or on the connecting structure of the outer wall; the elastic modulus of the sliding component is greater than or equal to 2 times the elastic modulus of the elastic component; The sliding component is arranged on the lower side of the elastic component in the horizontal direction.

2. The camera module according to claim 1, characterized in that: The elastic component is an elastic beam structure.

3. The camera module according to claim 1, characterized in that: A contact area is provided between the lens barrel module and the top of the housing, and the contact area is located on the upper side of the elastic component in a horizontal direction.

4. The camera module according to claim 1, characterized in that: The elastic component is provided with a mounting portion, and the elastic component is assembled to the lens barrel module through the mounting portion.

5. The camera module according to claim 4, characterized in that: The mounting portion is a buckle structure protruding from the inner side of the lens barrel module, and the buckle structure is folded to assemble the elastic component to the lens barrel module.

6. The camera module according to claim 1, characterized in that: The shell is provided with an opening, and a breathable membrane is arranged in the opening area.

7. The camera module according to claim 1, characterized in that: A dustproof film is provided on the upper part of the lens barrel module to prevent external foreign matter from entering the interior of the camera module.

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