Periscopic camera module structure

Abstract

The utility model relates to the technical field of cameras, and discloses a periscopic camera module structure, which comprises a motor assembly, a lens arranged on the motor assembly, a lens bracket arranged on the motor assembly along a light incoming direction and a light sensing assembly arranged on the lens bracket, the photosensitive assembly is located on a second light outlet side of the working cavity, one side, close to the motor assembly, of the working cavity is provided with a light inlet cavity section, a reflecting surface is arranged in the light inlet cavity section, and a plane mirror with a coating film on the surface is laid on the reflecting surface. A traditional prism is replaced by the plane mirror, so that the light and thin performance of equipment is guaranteed, the length of the module structure is shortened on the whole, the internal structure and the light path of the module are changed relative to the prism, stray light reflected by the light path for multiple times and the boundary dimension are reduced, the cost of the plane mirror is lower than that of the prism, and the overall cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to camera technical field, especially a periscopic camera module structure. BACKGROUND

[0002] Periscopic camera module is a kind of special camera module used on mobile phone or camera and other equipment, it realizes the function of high optical zoom ratio in smaller space by the design of folding light path.Periscopic camera module adopts the design of folding light path, light is refracted when entering lens group, 90 ° change of light path is realized by prism and other optical elements, so that the photograph of more far focal length is realized.This design makes that camera module can be placed parallel to the surface of equipment, is no longer limited to lens height, provides greater flexibility for the internal design of equipment.

[0003] Periscopic camera module is composed of prism, VCM motor (voice coil motor), lens assembly and photosensitive element (such as CMOS sensor).Among them, prism is responsible for changing the direction of light path, to realize high zoom ratio without increasing the thickness of equipment, meet the demand of modern equipment thinning.However, although prism can meet the requirement of equipment thinning in thickness, the length is longer, still needs to reserve more space in actual application, therefore the overall length of equipment is longer, and the use cost of prism is higher. UTILITY MODEL CONTENT

[0004] In view of the above technical problems of prior art, the utility model wants to solve the technical problem of providing a periscopic camera module structure to solve the problem that the use volume of prism in the existing periscopic camera module is still large and the cost is high.

[0005] To solve the above technical problems, one technical scheme of the utility model is provided: a periscopic camera module structure includes motor assembly, lens installed on motor assembly, lens holder installed on a first light outlet side of motor assembly along a light inlet direction and photosensitive assembly installed on lens holder, the lens holder has a working cavity for light to pass through lens and shoot in the light inlet direction, the photosensitive assembly is located on a second light outlet side of working cavity, the side of working cavity close to motor assembly has a light inlet cavity section, the light inlet cavity section has a reflective surface inclined relative to light inlet direction, and the reflective surface is paved with plane mirror with coating.

[0006] Further, the second light outlet side is located in the light outlet direction of light reflected by reflective surface after light inlet direction and is distributed on the side of light inlet cavity section.

[0007] Further, the light inlet cavity section has a light inlet coaxial with the reflecting surface and the first light outlet side, the light inlet cavity section has a first abutting surface on a side away from the second light outlet side, the light inlet cavity section has a second abutting surface on a side close to the second light outlet side relative to the reflecting surface, the flat mirror has a first abutting edge abutting the first abutting surface and a second abutting edge abutting the second abutting surface when the flat mirror abuts the reflecting surface, and the second abutting surface has a third abutting surface on a side away from the reflecting surface, the third abutting surface forms an angle with the second abutting surface, and the second abutting edge abuts the third abutting surface.

[0008] Further, the first abutting surface is parallel to the light inlet direction, and the first abutting edge is parallel to the first abutting surface.

[0009] Further, the second abutting surface is parallel to a horizontal direction perpendicular to the light inlet direction, and the second abutting edge is parallel to the second abutting surface.

[0010] Further, the working cavity further comprises a light outlet cavity section, the light sensing assembly is arranged on a side of the light outlet cavity section away from the light inlet cavity section, a frame-shaped light shield is arranged at a connection between the light outlet cavity section and the light inlet cavity section, and the light shield has a transmission hole on an inner side thereof for light to pass in a light outlet direction.

[0011] Further, the light inlet cavity section is narrower than the light outlet cavity section to form a stepped portion at the connection, an outer side of the light shield is connected to the stepped portion, and a side of the light shield away from the second abutting surface extends out of the working cavity towards a side of the motor assembly.

[0012] Further, one side of the mirror frame along the light inlet direction has a matching surface shaped to match the motor assembly, the matching surface has a protrusion protruding therefrom on a side close to the second light outlet side, and the motor assembly has a stepped groove corresponding to the protrusion.

[0013] Further, a side of the motor assembly facing the matching surface has a relief cavity communicating with the working cavity, and the part of the light shield extending out of the working cavity extends into the relief cavity.

[0014] Further, a side of the mirror frame away from the second light outlet side has an outer inclined wall shaped to match the reflecting surface and an extension surface connected to the outer inclined wall and parallel to the matching surface, and the extension surface forms an extension platform on the side of the mirror frame away from the second light outlet side.

[0015] The utility model discloses a periscope camera module structure has at least the following beneficial effects: replace the traditional prism with plane mirror to shorten the length of module structure from the whole while guaranteeing the thin of equipment, and change the module internal structure and optical path relative to prism, reduce the stray light and appearance size of optical path multiple reflection, and the use of plane mirror is lower than the cost relative to prism, thereby reducing the overall cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings described herein are intended to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their description serve to explain the present application. They do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 It is a structure schematic view of the periscope camera module structure of the utility model;

[0018] Figure 2 It is a front view of the periscope camera module structure of the utility model;

[0019] Figure 3 It is Figure 2 It is an enlarged view of part A shown in the figure;

[0020] Figure 4 It is an explosion view of the periscope camera module structure of the utility model;

[0021] Figure 5 It is Figure 4 It is an enlarged view of part B shown in the figure.

[0022] The meanings of the various reference numerals in the drawings are as follows:

[0023] Motor assembly 1, ladder groove 11, avoidance cavity 12, lens 2, lens holder 3, matching surface 31, boss 32, working cavity 33, light inlet cavity section 331, first bearing surface 3311, second bearing surface 3312, third bearing surface 3313, bevel 3314, light guide inclined surface 3315, side groove 3316, light outlet cavity section 332, step part 3321, light inlet 333, reflecting surface 334, second light outlet side 335, outer inclined wall 336, extension surface 337, photosensitive assembly 4, connecting holder 41, irradiation port 42, optical filter 43, chip 44, circuit board 45, electrical connector 46, plane mirror 5, first bearing edge 51, second bearing edge 52, light shield 6, transmission hole 61. DETAILED DESCRIPTION

[0024] The utility model will be further described below in connection with the drawings.

[0025] Please refer to Figures 1 to 5The utility model discloses a periscope camera module structure includes motor assembly 1, install lens 2 on motor assembly 1, install the frame 3 of a first light outlet side on motor assembly 1 along one light inlet direction and install photosensitive component 4 on frame 3, and motor assembly 1 is used for realizing lens 2 anti -shake and focusing focusing, and lens 2 is used for focusing light, and frame 3 is used for connecting and supporting motor assembly 1 and photosensitive component 4, and photosensitive component 4 is used for converting optical image into electric signal, to make it image.

[0026] In the embodiment, motor assembly 1 includes base, carrier movably installed in base, shell buckled on base and covered outside carrier and electromagnetic structure, base cooperates shell and is mutually buckled to play the role of fixing and supporting, electromagnetic structure includes magnet and coil to be used for generating magnetic field loop, electromagnetic structure is electrically connected with photosensitive component 4 to realize electric signal transmission, lens 2 is installed on carrier, and electromagnetic structure is used to drive carrier and lens 2 on carrier to move. First light outlet side is formed with base, and the first perforation that is communicated along the light inlet direction is formed on the base, and the first perforation is coaxial with lens 2 and is defined as the first light outlet side. The specific internal structure of motor assembly 1 is prior art, and any prior motor assembly 1 can be used in the embodiment, which will not be described in detail here. It should be noted that the periscope motor can be replaced by a general motor to reduce the cost.

[0027] In the embodiment, lens 2 includes outer support and a plurality of lenses arranged in lens 2, and an outer wall of lens 2 is usually provided with external threads, and an assembly hole is usually formed on the carrier of motor assembly 1, and the assembly hole has internal threads, so that lens 2 is screwed on the carrier to complete assembly. Among them, lens 2 and motor assembly 1 are coaxially arranged and the axial direction is the light inlet direction.

[0028] In the embodiment, the fitting surface 31 is formed on one side of the frame 3 along the light inlet direction, and the shape of the fitting surface 31 is adapted to the cross-sectional shape of the motor assembly 1, so that the motor assembly 1 can be aligned with the fitting surface 31 along the light inlet direction, thereby connecting the base of the motor assembly 1 to the fitting surface 31 during assembly. In order to increase the bonding force between the motor assembly 1 and the frame 3 and improve the stability, a boss 32 is protruded along the reverse direction of the light inlet direction on one side edge of the fitting surface 31 along a horizontal direction perpendicular to the light inlet direction, and a ladder groove 11 adapted to the shape of the boss 32 is recessed on the base of the motor assembly 1 corresponding to the position of the boss 32. The ladder groove 11 is open to the side away from the ladder groove 11 along the horizontal direction, so that the ladder groove 11 is L-shaped and the base is connected to the fitting surface 31, and the boss 32 extends into the ladder groove 11.

[0029] In the content defined by the embodiment, the inner part of the frame 3 is hollow and has a working cavity 33, the working cavity 33 has a light inlet cavity section 331 and a light outlet cavity section 332 connected with the light inlet cavity section 331 in sequence in the horizontal direction, wherein the light inlet cavity section 331 is located on the side close to and opposite to the motor assembly 1, and the light outlet cavity section 332 is located on the side away from the motor assembly 1. A light inlet opening 333 of the through matching surface 31 is arranged on the side opposite to the light inlet direction of the light inlet cavity section 331, the light inlet opening 333 is opposite to and coaxial with the first light outlet side (i.e. the central axes are collinear) to make the light passing through the lens 2 pass through the light inlet opening 333 in the light inlet direction to the light inlet cavity section 331. In the embodiment, the light inlet cavity section 331 is in the shape of a triangular prism as a whole, and the side of the light inlet cavity section 331 away from the matching surface 31 has a reflecting surface 334 inclined to the light inlet direction, one side of the reflecting surface 334 is close to the matching surface 31 and the opposite side is away from the matching surface 31. The reflecting surface 334 is through to the side of the motor assembly 1 in the reverse direction of the light inlet direction to form the light inlet opening 333. The reflecting surface 334 is square, and a square plane mirror 5 is arranged on the reflecting surface 334, the length and width of the plane mirror 5 are slightly smaller than those of the reflecting surface 334, so that the plane mirror 5 can be mounted on the reflecting surface 334. A coating is coated on the surface of the plane mirror 5 to improve the light transmittance of the plane mirror 5, reduce reflection, and improve imaging quality. The light inlet opening 333, the reflecting surface 334 and the first light outlet side are on the same straight line and coaxial. Side grooves 3316 connected with the matching surface 31 are recessed on the two side walls of the light inlet cavity section 331 to facilitate the use of tools to take and place the plane mirror 5 from the side grooves 3316. In order to reduce light leakage of the plane mirror 5 and reduce stray light, one side of the plane mirror 5 close to the matching surface 31 is defined as a first abutting edge 51, and the side of the plane mirror 5 opposite to the first abutting edge 51 and away from the first abutting edge 51 is defined as a second abutting edge 52. A first abutting surface 3311 is formed on the side of the light inlet cavity section 331 close to the matching surface 31, and the first abutting surface 3311 is used for the first abutting edge 51 of the plane mirror 5 to abut on it. The first abutting surface 3311 is parallel to the light inlet direction and perpendicular to the matching surface 31 to facilitate the plane mirror 5 to be mounted in the light inlet cavity section 331 in the light inlet direction during assembly. The first abutting edge 51 is preferably arranged parallel to the first abutting surface 3311 to make the first abutting edge 51 face the first abutting surface 3311 and block light to a certain extent. A second abutting surface 3312 connected with the reflecting surface 334 in sequence is formed on the inner wall of the light inlet cavity section 331 opposite to the first abutting surface 3311, the second abutting edge 52 corresponds to the second abutting surface 3312 and abuts on the second abutting surface 3312 when the plane mirror 5 is attached to the reflecting surface 334, and the second abutting surface 3312 is used to block the second abutting edge 52 to prevent light leakage.In order to make the shielding effect of the second abutting surface 3312 optimal, the second abutting surface 3312 is parallel to the horizontal direction, and the second abutting edge 52 is arranged parallel to the second abutting surface 3312. A third abutting surface 3313 is arranged on the side of the second abutting surface 3312 away from the reflecting surface 334, and the third abutting surface 3313 is arranged intersecting the second abutting surface 3312 to form a folding angle 3314 with the second abutting surface 3312, so that the second abutting edge 52 can be limited by the folding angle 3314 and abut against the third abutting surface 3313. The third abutting surface 3313 can be arranged parallel to the first abutting surface 3311, and the folding angle 3314 between the second abutting surface 3312 and the third abutting surface 3313 is 90°, or the folding angle 3314 can be other angles within 180°. A light guide inclined surface 3315 is further formed between the side of the third abutting surface 3313 away from the second abutting surface 3312 and close to the light emitting cavity section 332, so as to expand the exit range of the plane mirror 5.

[0030] In the embodiment, a second light emitting side 335 is formed on the side of the light emitting cavity section 332 away from the light receiving cavity section 331, and the second light emitting side 335 is located in the light emitting direction of the light emitting cavity section 332 after the light is reflected by the reflecting surface 334 in the light receiving direction, so that the second light emitting side 335 is distributed on the side of the light receiving cavity section 331, thereby making the thickness of the entire camera module keep a small value. The light is reflected by the plane mirror 5 to the second light emitting side 335 after being incident into the plane mirror 5 and being reflected by the side of the plane mirror 5 close to the reflecting surface 334, and the photosensitive assembly 4 is arranged on the second light emitting side 335 and located on the side of the working cavity 33 away from the light receiving cavity section 331 to receive the light. The first abutting surface 3311 is away from the second light emitting side 335 relative to the reflecting surface 334, and the second abutting surface 3312 is close to the second light emitting side 335 relative to the reflecting surface 334.

[0031] In the embodiment, in order to reduce stray light, a frame-shaped light shield 6 is arranged at the joint of the light-out cavity section 332 and the light-in cavity section 331, the light shield 6 is square, the inner side of the light shield 6 has a transmission hole 61 for light to pass in the light-out direction, the transmission hole 61 and the light-sensing assembly 4 are both located on the path of the light-out direction after the light is projected to the plane mirror 5, and each side of the light shield 6 is close to the inner wall of the light-out cavity section 332 to prevent light from being reflected in the gap to form stray light. In order to better avoid light leakage, the light-in cavity section 331 is narrower than the light-out cavity section 332 to form a stepped portion 3321 at the joint of the opposite two sides, the light guide slope 3315 is arranged to prevent light from being projected to the side of the light shield 6 close to the light guide slope 3315, and the outer side of the light shield 6 is connected to the stepped portion 3321, so that light cannot leak from the gap between the stepped portion 3321 and the light shield 6 to generate stray light. The side of the light shield 6 away from the second abutting surface 3312 extends out of the working cavity 33 to the side of the motor assembly 1. In order to avoid the light shield 6 affecting the arrangement of the motor assembly 1, a recessed avoiding cavity 12 is arranged on the side of the base of the motor assembly 1 facing the matching surface 31 and communicating with the working cavity 33, and the part of the light shield 6 extending out of the working cavity 33 extends into the avoiding cavity 12.

[0032] In the embodiment, the outer inclined wall 336 matched with the reflecting surface 334 and the extension surface 337 connected to the outer inclined wall 336 and parallel to the matching surface 31 are formed on the outer wall of the mirror frame 3 away from the second outlet side, and the extension surface 337 makes the side of the mirror frame 3 away from the second outlet side form an extension platform, thereby reducing the material use of the mirror frame 3 and reducing the cost.

[0033] In the embodiment, the light-sensing assembly 4 comprises a connecting frame 41 connected to the second outlet side of the mirror frame 3, an irradiation opening 42 formed on the connecting frame 41, a filter 43 and a chip 44 connected in sequence at the irradiation opening 42 in the light-out direction, and a circuit board 45 electrically connected to the chip 44, wherein the irradiation opening 42 is matched with the light-out cavity section 332, the filter 43 is used for receiving a required light source, the chip 44 converts light into an electric signal, and the circuit board 45 provides power for the chip 44 and is used for signal transmission, wherein the side of the circuit board 45 has a secondary board matched with the outer wall of the mirror frame 3, and an electrical connector 46 is connected to the side of the circuit board 45 away from the mirror frame 3.

[0034] The working mode of one of the embodiments of the periscopic camera module structure is as follows: the light in the utility model is natural light or an illumination light source, the light is projected to the lens 2 along the light-in direction, the lens 2 projects the light to the plane mirror 5 and reflects the light to the filter 43 along the light-out direction, the filter 43 captures the light and projects the corresponding light to the chip 44, and the chip 44 converts the light signal into an electric signal to complete image processing.

Claims

1.A periscope camera module structure, comprising a motor assembly, a lens mounted on the motor assembly, a lens holder mounted on a first light exit side of the motor assembly along a light entrance direction, and a photosensitive assembly mounted on the lens holder, wherein the lens holder has a working cavity for light to pass through the lens and enter the working cavity along the light entrance direction, and the photosensitive assembly is located on a second light exit side of the working cavity, characterized in that: The working cavity is provided with a light inlet cavity section near one side of the motor assembly, and a reflecting surface is arranged in the light inlet cavity section and is inclined relative to the light inlet direction, and a plane mirror is arranged on the reflecting surface and is provided with a coating on the surface; The light inlet cavity section is provided with a second abutting surface on the side near the second light outlet side relative to the reflecting surface; the working cavity further comprises a light outlet cavity section, and the photosensitive assembly is arranged on the side of the light outlet cavity section away from the light inlet cavity section, and a frame-shaped light shield is arranged at the joint between the light outlet cavity section and the light inlet cavity section, and the inner side of the light shield is provided with a transmission hole for light to pass in the light outlet direction; The light inlet cavity section is narrower than the light outlet cavity section to form a stepped portion at the joint, the outer side of the light shield is connected to the stepped portion, and the side of the light shield away from the second abutting surface extends out of the working cavity towards the side of the motor assembly. 2.The periscope camera module structure of claim 1, wherein: The second light outlet side is located in the light outlet direction of the light reflected by the reflecting surface and is distributed on the side of the light inlet cavity section. 3.The periscope camera module structure of claim 1 or 2, wherein: The light inlet cavity section is provided with a light inlet port coaxial with the reflecting surface and the first light outlet side, the side of the light inlet cavity section away from the second light outlet side is provided with a first abutting surface, the plane mirror is provided with a first abutting edge abutting against the first abutting surface and a second abutting edge abutting against the second abutting surface when the plane mirror is attached to the reflecting surface, and the side of the second abutting surface away from the reflecting surface is provided with a third abutting surface, the third abutting surface and the second abutting surface form an angle therebetween, and the second abutting edge abuts against the third abutting surface. 4.The periscope camera module structure of claim 3, wherein: The first abutting surface is parallel to the light inlet direction, and the first abutting edge is arranged parallel to the first abutting surface. 5.The periscope camera module structure of claim 3, wherein: The second abutting surface is parallel to a horizontal direction perpendicular to the light inlet direction, and the second abutting edge is arranged parallel to the second abutting surface. 6.The periscope camera module structure of claim 3, wherein: One side of the mirror frame in the light inlet direction is provided with a matching surface matching the shape of the motor assembly, the side of the matching surface near the second light outlet side is provided with a boss, and the motor assembly is recessed at a position corresponding to the boss to form a ladder groove for the boss to extend into. 7.The periscope camera module structure of claim 6, wherein: The side of the motor assembly facing the matching surface is recessed to form a avoiding cavity communicating with the working cavity, and the part of the light shield extending out of the working cavity extends into the avoiding cavity. 8.The periscope camera module structure of claim 6, wherein: The side of the mirror frame away from the second light outlet side is provided with an outer inclined wall matching the reflecting surface and an extension surface connected to the outer inclined wall and parallel to the matching surface, and the extension surface forms an extension platform on the side of the mirror frame away from the second light outlet side.

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