A lens module and an imaging device

Abstract

Embodiments of the present disclosure provide a lens module and an imaging device. The lens module comprises a lens barrel, a lens group accommodated in the lens barrel, a driving motor arranged on the outer periphery of the lens barrel and connected with the lens barrel, and a first lens arranged on the image side of the lens group. The first lens comprises an optical part for imaging and a bearing part arranged around the optical part. The bearing part comprises an object side bearing surface close to the object side and an image side bearing surface close to the image side. The lens module further comprises a light shield arranged on the image side bearing surface of the first lens, wherein the light shield is pasted on the image side bearing surface of the first lens. The image side bearing surface of the first lens close to the image side is provided with a groove, and the groove is filled with a glue structure for pasting and fixing the light shield on the image side bearing surface of the first lens. In the present disclosure, the light shield arranged on the image side bearing surface of the optical lens can intercept the light entering the bearing part, avoid the stray light from entering the driving motor, avoid the stray light pollution, and ensure the imaging effect.

Description

Technical Field

[0001] The embodiments disclosed herein belong to the field of optical imaging technology, specifically relating to a lens module and imaging device. Background Technology

[0002] With the continuous development of technology, electronic devices are becoming increasingly intelligent. In addition to digital cameras, portable electronic devices such as tablets and mobile phones are also equipped with lens modules that can take photos and videos to meet users' needs for taking photos anytime.

[0003] The lens module mainly includes a lens barrel, a lens assembly disposed within the lens barrel, and a motor disposed around the lens barrel. During assembly using the AA process, the lens closest to the image side is directly bonded to the lens barrel opening platform for fixation. Due to the lack of a light-blocking component to intercept stray light at the rear and the reduced size of the motor, light from the rear is more likely to directly hit the motor, causing primary reflection stray light and affecting image formation.

[0004] Therefore, how to solve the above problems has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The embodiments disclosed herein are intended to at least solve one of the technical problems existing in the prior art, and to provide a lens module and imaging device.

[0006] A first aspect of the embodiments of this disclosure provides a lens module, the lens module including a lens barrel, a lens group housed within the lens barrel, a drive motor disposed on the outer periphery of the lens barrel and connected to the lens barrel, and a first lens disposed on the image side of the lens group, the first lens including an optical part for imaging and a support part disposed around the optical part, the support part including an object-side support surface near the object side and an image-side support surface near the image side;

[0007] The lens module further includes a light-shielding sheet disposed on the image-side bearing surface of the first lens, wherein the light-shielding sheet is attached to the image-side bearing surface of the first lens;

[0008] The image-side bearing surface of the first lens near the image side is provided with a groove, and the groove is filled with an adhesive structure for attaching and fixing the light-shielding sheet to the image-side bearing surface of the first lens.

[0009] Optionally, the projection of the light-shielding sheet completely covers the groove along a direction perpendicular to the image-side bearing surface.

[0010] Optionally, the light-shielding sheet is a metal light-shielding sheet.

[0011] Optionally, the groove is formed as an annular groove connected end to end on the image-side bearing surface along the circumference of the bearing portion.

[0012] Optionally, a plurality of grooves are arranged at intervals in the radial direction on the image-side bearing surface of the first lens near the image side.

[0013] Optionally, the lens module further includes an adhesive layer disposed on the object-side bearing surface of the first lens near the image side, wherein the object-side bearing surface of the first lens is bonded and fixed to the lens barrel by the adhesive layer.

[0014] Optionally, the lens barrel includes an inner wall surface facing the optical axis, and a bottom bearing surface formed at the image end of the lens barrel and connected to the inner wall surface;

[0015] The object-side bearing surface of the first lens, which is closer to the image side, is bonded and fixed to the bottom bearing surface of the lens barrel through the adhesive layer.

[0016] A second aspect of the embodiments of this disclosure provides an imaging device, including an imaging device comprising the lens module described above.

[0017] The beneficial effects of the embodiments of this disclosure include:

[0018] In this disclosure, the light-shielding plate disposed on the image-side bearing surface of the first lens can block the light rays entering the bearing portion, prevent stray light from hitting the drive motor, avoid stray light pollution, and ensure imaging effect.

[0019] In this disclosure, the light-shielding plate disposed on the image-side bearing surface of the first lens can intercept light rays entering the bearing portion, preventing stray light from reaching the drive motor, thus avoiding stray light pollution and ensuring imaging effect. Furthermore, in the method of forming a groove by slotting the image-side bearing surface of the first lens and bonding the light-shielding plate to the image-side bearing surface of the first lens using a filling adhesive structure, on the one hand, the inner wall of the groove can increase the bonding area with the adhesive structure, ensuring bonding strength; on the other hand, the slotted design can ensure the flatness of the fit between the image-side bearing surface and the light-shielding plate during bonding, which is also beneficial for the miniaturization design of the lens module. Additionally, the groove can effectively block the reflection path of stray light inside the lens barrel. Attached Figure Description

[0020] Figure 1 This is a structural cross-sectional view of a lens module according to an embodiment of the present disclosure;

[0021] Figure 2 for Figure 1 Enlarged schematic diagram of part of the structure;

[0022] Figure 3 This is an exploded view of the structure of the first lens and the light-shielding sheet along section AA of an embodiment of the present disclosure;

[0023] Figure 4This is a schematic diagram of the groove on the image-side bearing surface of the first lens according to an embodiment of the present disclosure;

[0024] Figure 5 This is a schematic diagram of the groove on the image-side bearing surface of the first lens according to another embodiment of the present disclosure;

[0025] Figure 6 This is a schematic diagram of the groove on the image-side bearing surface of the first lens in another embodiment of the present disclosure.

[0026] In the diagram, 10 is the lens module; 20 is the image plane; 30 is the optical axis; 11 is the lens barrel; 12 is the lens group; 13 is the drive motor; 14 is the light shield; 15 is the groove; 16 is the adhesive structure; 17 is the adhesive layer; 111 is the inner wall surface; 112 is the bottom support surface; 121 is the first lens; 1211 is the optical part; 1212 is the support part; 12121 is the object-side support surface; and 12122 is the image-side support surface. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions of this disclosure, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] The embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The detailed descriptions and accompanying drawings of the following embodiments are used to exemplarily illustrate the principles of this application, but should not be used to limit the scope of this application; that is, this application is not limited to the described embodiments. In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0029] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0030] like Figure 1-3As shown, a lens module 10 includes a lens barrel 11, a lens group 12 housed within the lens barrel 11, a drive motor 13 disposed on the outer periphery of the lens barrel 11 and connected to the lens barrel 11, and a first lens 121 disposed on the image side of the lens group 12. The first lens 121 includes an optical part 1211 for imaging and a support part 1212 disposed around the optical part 1211. The support part 1212 includes an object-side support surface 12121 near the object side and an image-side support surface 12122 near the image side.

[0031] The lens module 10 further includes a light-shielding sheet 14 disposed on the image-side bearing surface 12122 of the first lens 121, wherein the light-shielding sheet 14 is adhered to the image-side bearing surface 12122 of the first lens 121. A groove 15 is provided on the image-side bearing surface 12122 of the first lens 121 near the image side, and the groove 15 is filled with an adhesive structure 16 for adhering and fixing the light-shielding sheet 14 to the image-side bearing surface 12122 of the first lens 121.

[0032] Specifically, Figure 1 The image plane 20 located on the image side of the lens barrel 10 is shown, wherein the image-side bearing surface 12122 is the surface of the bearing part 1212 facing the mirror surface 20, and the object-side bearing surface 12121 is the surface of the bearing part 1212 away from the image plane 20.

[0033] In this disclosure, the light-shielding plate 14 disposed on the image-side bearing surface 12122 of the first lens 121 can intercept the light entering the bearing portion 1212, preventing stray light from being reflected to the image surface 20 after reaching the drive motor 13, thus avoiding stray light pollution and ensuring imaging effect. In addition, by slotting the image-side bearing surface 12122 of the first lens 121 to form a groove 15, and by using a filling adhesive structure 16 to bond and fix the light-shielding plate 14 to the image-side bearing surface 12122 of the first lens, on the one hand, the inner wall of the groove 15 can increase the bonding area with the adhesive structure 16, ensuring the bonding strength; on the other hand, the slotted design can ensure the flatness of the fit between the image-side bearing surface 12122 and the light-shielding plate 14 when bonded, which is also conducive to the miniaturization design of the lens module, and the groove can also effectively block the reflection path of stray light inside the lens barrel.

[0034] In some embodiments, the drive motor 13 is glued to the lens barrel 11. In other embodiments, the drive motor 13 is threadedly connected to the lens barrel 11 via a threaded connector. It is understood that the methods of fixing the drive motor 13 to the lens barrel 11 include, but are not limited to, gluing and threaded connection, and may also include other methods of fixing.

[0035] In some embodiments, the projection of the light-shielding plate 14 completely covers the image-side bearing surface 12122 along a direction perpendicular to the image-side bearing surface 12122. This arrangement allows the light-shielding plate 14 to completely block light rays entering the image-side bearing surface 12122, preventing stray light from passing through the image-side bearing surface 12122 and reaching the drive motor 13, thus ensuring image quality.

[0036] In another embodiment, the light-shielding sheet 14 is attached to the image-side bearing surface 12122 and extends beyond the inner peripheral edge of the image-side bearing surface 12122 near the optical axis 30, and also extends beyond the outer peripheral edge of the image-side bearing surface 12122. The light-shielding sheet 14 extends beyond the inner peripheral edge of the image-side bearing surface 12122 in the direction of the optical axis 30, effectively covering the inner peripheral edge of the image-side bearing surface 12122 and blocking the possibility of stray light diffracted from the inner peripheral edge of the image-side bearing surface 12122. Furthermore, the light-shielding sheet 14 extends beyond the outer peripheral edge of the image-side bearing surface 12122, effectively covering the outer peripheral edge of the image-side bearing surface 12122 and blocking the possibility of stray light diffracted from the outer peripheral edge of the image-side bearing surface 12122. Therefore, by adopting the above-described arrangement, the light-shielding effect can be further guaranteed.

[0037] refer to Figure 2-3 In some embodiments, the light-shielding sheet 14 is bonded to the image-side bearing surface 12122 of the first lens 121 by filling the groove 15 with adhesive and by the adhesive curing effect of the adhesive.

[0038] In other embodiments, the surface of the adhesive structure 16 away from the bottom of the groove 15 is formed flush with the image-side bearing surface 12122 of the first lens 121. This arrangement effectively ensures a tight fit between the light-shielding sheet 14 and the image-side bearing surface 12122. Furthermore, the groove and adhesive fixing method also contribute to the compact design of the lens module 10.

[0039] In some embodiments, the projection of the light-shielding sheet 14 completely covers the groove 15 along a direction perpendicular to the image-side bearing surface 12122.

[0040] In some embodiments, the light-shielding sheet 14 is a metal light-shielding sheet. Metal light-shielding sheets possess excellent optical properties, mechanical stability, and environmental resistance, as well as excellent stray light suppression capabilities. It is understood that the light-shielding sheet 14 includes, but is not limited to, metal light-shielding sheets, and can also be made of other materials with light-shielding properties.

[0041] Specifically, the light-shielding sheet 14 is a light-shielding sheet made of ferrous metal material.

[0042] refer to Figure 4In some embodiments, the groove 15 is formed as an annular groove 15 connected end to end on the image-side bearing surface 12122 along the circumference of the bearing portion 1212. In this disclosure, by forming an annular groove 15 in the circumference of the image-side bearing surface 12122, the annular groove 15 can block the reflection path of stray light inside the lens barrel 11. Furthermore, the light-shielding plate 14, which is circumferentially fitted to the groove 15, can effectively cover the circumference of the bearing portion 1212 of the first lens 121, further ensuring the imaging effect.

[0043] In some embodiments, the light-shielding sheet 14 is formed as a closed annular light-shielding sheet around the groove 15.

[0044] refer to Figure 5 In some embodiments, a plurality of grooves 15 are arranged at intervals in the radial direction of the image-side bearing surface 12122 of the first lens 121 near the image side. In this disclosure, by opening a plurality of grooves in the radial direction of the image-side bearing surface 12122, the reflection path of stray light inside the lens barrel can be blocked in multiple layers by the multiple grooves, thereby further ensuring the imaging quality.

[0045] Specifically, along the radial direction of the first lens 121, a plurality of grooves 15 are arranged in a ring at equal intervals on the image-side bearing surface 12122 of the first lens 121 near the image side.

[0046] refer to Figure 6 In some embodiments, a plurality of grooves 15 are spaced apart in the circumferential direction on the image-side bearing surface 12122 of the first lens 121 near the image side. In this disclosure, by creating a plurality of grooves in the circumferential direction on the image-side bearing surface 12122, the amount of adhesive used can be reduced, thus saving costs.

[0047] For details, please refer to the following: Figure 1-2 In some embodiments, the lens module 10 further includes an adhesive layer 17 disposed on the object-side bearing surface 12121 of the first lens 121 near the image side, wherein the object-side bearing surface 12121 of the first lens 121 is bonded and fixed to the lens barrel 11 by the adhesive layer 17. In this disclosure, the adhesive layer 17 can uniformly transmit the assembly stress between the lens barrel 11 and the lens 121, avoiding local stress concentration caused by rigid fixing and damage to the first lens 121, thereby improving the reliability of the lens module.

[0048] In some embodiments, the lens barrel 11 includes an inner wall surface 111 facing the optical axis 30, and a bottom bearing surface 112 formed at the image end of the lens barrel 11 and connected to the inner wall surface 111, wherein the object-side bearing surface 12121 of the first lens 121 near the image side is bonded and fixed to the bottom bearing surface 112 of the lens barrel 11 by the adhesive layer 17.

[0049] In this disclosure, the bottom bearing surface 112 of the lens barrel 11 and the object-side bearing surface 12121 of the first lens 121 are both formed as horizontal planes, and the bottom bearing surface 112 and the object-side bearing surface 12121 are bonded together by the adhesive layer 17 to achieve coplanar bonding. This setting can effectively control the degree of deviation between the optical axis 30 and the mechanical axis of the lens barrel, and ensure the assembly yield of the lens module.

[0050] A second aspect of the embodiments of this disclosure is to provide an imaging device, the imaging device including the lens module described above.

[0051] In some embodiments, the lens group 12 of the lens module 10 includes six lenses from the object side to the image side, wherein the lens module 10 is a first lens 121 near the image side, and a light-shielding plate 14 is provided on the image side bearing surface 12122 of the first lens 121.

[0052] A third aspect of the embodiments of this disclosure is to provide an electronic device, the electronic device including the imaging device described above.

[0053] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A lens module, characterized in that, The lens module includes a lens barrel, a lens group housed within the lens barrel, a drive motor disposed on the outer periphery of the lens barrel and connected to the lens barrel, and a first lens disposed on the image side of the lens group. The first lens includes an optical part for imaging and a support part disposed around the optical part. The support part includes an object-side support surface near the object side and an image-side support surface near the image side. The lens module further includes a light-shielding sheet disposed on the image-side bearing surface of the first lens, wherein the light-shielding sheet is attached to the image-side bearing surface of the first lens; The image-side bearing surface of the first lens near the image side is provided with a groove, and the groove is filled with an adhesive structure for attaching and fixing the light-shielding sheet to the image-side bearing surface of the first lens.

2. The lens module according to claim 1, characterized in that, Along a direction perpendicular to the image-side bearing surface, the projection of the light-shielding sheet completely covers the groove.

3. The lens module according to claim 1, characterized in that, The light-shielding sheet is a metal light-shielding sheet.

4. The lens module according to claim 1, characterized in that, The groove is formed as an annular groove connected end to end on the image-side bearing surface along the circumference of the bearing portion.

5. The lens module according to claim 1, characterized in that, The first lens near the image side has a plurality of grooves arranged at intervals in the radial direction on the image-side bearing surface.

6. The lens module according to claim 1, characterized in that, The lens module further includes an adhesive layer disposed on the object-side bearing surface of the first lens near the image side, wherein the object-side bearing surface of the first lens is bonded and fixed to the lens barrel by the adhesive layer.

7. The lens module according to claim 6, characterized in that, The lens barrel includes an inner wall surface facing the optical axis, and a bottom bearing surface formed at the image end of the lens barrel and connected to the inner wall surface; The object-side bearing surface of the first lens, which is closer to the image side, is bonded and fixed to the bottom bearing surface of the lens barrel through the adhesive layer.

8. An imaging device, characterized in that, The imaging device includes the lens module as described in any one of claims 1-7.

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