Camera unit and camera module

Abstract

The utility model provides a camera shooting unit and a camera shooting module, and the camera shooting unit comprises a lens which comprises an outer wall, and the outer wall is provided with an external thread; the lens base comprises an inner wall, the inner wall is provided with an internal thread and a contact surface, and the contact surface protrudes out of the inner wall and is close to the optical axis of the lens; wherein the lens and the lens base are fixedly connected through the external threads and the internal threads, and the outer walls of the lens and the lens base abut against the contact surface. The internal thread connected with the lens and the contact surface abutting against the lens are arranged on the inner wall of the lens base, the contact surface protrudes out of the inner wall and is close to the optical axis of the lens, and the contact surface is used for limiting the installation position of the lens and the lens base, so that inclination and assembly eccentricity of the lens are prevented, and the assembly precision and the product yield are improved.

Description

Technical Field

[0001] This utility model relates to the field of optical imaging technology, and in particular to a camera unit and a camera module. Background Technology

[0002] With the popularization of mobile electronic devices, the technology of camera modules used in mobile electronic devices to help users acquire images (such as videos or pictures) has developed and progressed rapidly. In recent years, camera modules have been widely used in many fields such as medical care, security, and industrial production.

[0003] A camera module consists of a lens and an image sensor. However, during the process of packaging the lens and image sensor to form a camera module, it is difficult to ensure that the imaging surface of the lens coincides with the image sensor, and it is also difficult to ensure that the optical axis of the lens is consistent with the central axis of the image sensor. Once there is a deviation in the assembly process of the lens and image sensor, resulting in eccentricity or tilting, the imaging quality of the camera module will inevitably be greatly affected, leading to substandard resolution. Consequently, it is difficult to control and guarantee the product yield of the camera module. Utility Model Content

[0004] To address the aforementioned problems, the present invention aims to provide a camera unit comprising: a lens, the lens including an outer wall having an external thread; and a lens mount including an inner wall having an internal thread and a contact surface, the contact surface protruding from the inner wall and close to the optical axis of the lens; wherein the lens and the lens mount are fixedly connected by the external thread and the internal thread, and the outer wall abuts against the contact surface.

[0005] More preferably, the mirror base further includes a bottom surface, and the contact surface is disposed at one end of the mirror base near the bottom surface; a first gap is formed between the inner wall and the outer wall, and the first gap is located above the contact surface.

[0006] More preferably, the camera unit further includes a first elastic element, which is clamped between the lens and the lens mount, and the force of the first elastic element returning to its original shape is used to keep the external thread and the internal thread in contact.

[0007] More preferably, the camera unit further includes a fixing adhesive, which is disposed above the connection between the external thread and the internal thread, for bonding and fixing the lens and the lens mount.

[0008] More preferably, the camera unit further includes a first lens and an adjustment bracket, the first lens and the adjustment bracket being connected by a first adhesive, and the first lens being fixedly mounted on the top of the lens by the adjustment bracket.

[0009] More preferably, the adjustment bracket is connected to the lens via a thread.

[0010] More preferably, it further includes a second elastic element, which is clamped between the adjustment bracket and the lens, and the force of the second elastic element returning to its original shape is used to keep the adjustment bracket and the lens in contact.

[0011] More preferably, the camera unit further includes a first lens and a screw cap, the screw cap being used to press the first lens onto the top of the lens.

[0012] More preferably, the camera unit further includes a second adhesive for bonding the first lens to the top of the lens.

[0013] On the other hand, this utility model provides a camera module, including a photosensitive chip, a circuit board and a camera unit. The photosensitive chip and the camera unit are both disposed on the circuit board, and the photosensitive chip is located directly below the lens along the optical axis.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] (1) An internal thread for connecting to the lens and a contact surface for abutting the lens are provided on the inner wall of the lens mount. The contact surface protrudes from the inner wall and is close to the optical axis of the lens. The contact surface is used to limit the installation position of the lens and the lens mount, prevent the lens from tilting and misaligning during assembly, and improve assembly accuracy and product yield. (2) There is a first gap between the inner wall and the outer wall, and the first gap is located above the contact surface to prevent the lens from tilting or misaligning due to interference from the rest of the inner wall when it is assembled into the lens mount, thereby improving assembly efficiency. (3) The optical system of the camera unit is divided into a first lens and a lens. During the assembly process, the position of the imaging surface of the camera unit is adjusted by controlling the assembly position of the first lens and the lens, thereby achieving the overlap between the imaging surface and the photosensitive chip. The first lens solves the problem of the bias or tilt of the imaging surface and improves the imaging quality. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 A schematic diagram of the camera unit structure of the first embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the camera unit structure according to the second embodiment of the present invention;

[0019] Figure 3A schematic diagram of the camera unit structure provided in the third embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the camera module structure provided by this utility model. Detailed Implementation

[0021] To better understand this invention, various aspects of the invention will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of embodiments of the invention and are not intended to limit the scope of the invention in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0022] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, the above terms should not be construed as limitations on this utility model.

[0023] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of the present invention, the word "may" is used to indicate "one or more embodiments of the present invention." And the term "exemplary" is intended to refer to an example or illustration.

[0024] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0025] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] See also Figure 1 The first embodiment of this application provides a camera unit, including: a lens 10, the lens 10 including an outer wall 11, the outer wall 11 being provided with an external thread 111; a lens mount 20, the lens mount 20 including an inner wall 21, the inner wall 21 being provided with an internal thread 211 and a contact surface 212, the contact surface 212 protruding from the inner wall 21 and close to the optical axis o of the lens 10; wherein, the lens 10 and the lens mount 20 are fixedly connected by the external thread 111 and the internal thread 211, and the outer wall 11 abuts against the contact surface 212. It is understood that the contact surface 212 is a protrusion of the inner wall 21 of the lens mount 20, and can be a sloped surface or an arc surface. As long as it is a surface that protrudes from the inner wall 21 and abuts against the outer wall 11, serving to limit the position of the lens 10 within the lens mount 20, it falls within the protection scope of this application. By providing an internal thread 211 for connecting to the lens 10 and a contact surface 212 that abuts against the lens 10 on the inner wall 21 of the lens mount 20, the contact surface 212 protrudes from the inner wall 21 and is close to the optical axis o of the lens 10. The contact surface 212 is used to limit the installation position of the lens 10 and the lens mount 20, prevent the lens 10 from tilting and assembly from being misaligned, and improve assembly accuracy and product yield.

[0027] Considering that the lens 10 and the lens mount 20 achieve the movement of the lens 10 in the optical axis o direction through the external thread 111 and the internal thread 211, so that the imaging surface of the lens 10 is proportionally offset along the optical axis o direction, the cooperation of the internal thread 211 and the external thread 111 also helps to precisely control the position of the imaging surface of the lens 10 relative to the lens mount 20, that is, the position of the imaging surface of the lens 10 relative to the bottom of the lens mount 20 can be precisely adjusted. For example, the pitch of the external thread 111 is 0.35mm, that is, when the lens 10 rotates 1°, the corresponding height of movement in the optical axis o direction is 0.35mm / 360°=0.97um / °. The external thread 111 can be any one of the following: triangular thread, rectangular thread, or trapezoidal thread.

[0028] More preferably, the mirror mount 20 further includes a bottom surface 22, and a contact surface 212 is disposed at one end of the mirror mount 20 near the bottom surface 22; a first gap 23 is formed between the inner wall 21 and the outer wall 11, and the first gap 23 is located above the contact surface 212. Please refer to... Figure 1 In the illustrated embodiment, considering that the lens 10 is assembled into the lens mount 20 from above along the optical axis o, the contact surface 212 is set at the end of the lens mount 20 near the bottom surface 22, and the lens mount 20 as a whole has a larger opening at the top and a smaller opening at the bottom. This is beneficial for the lens 10 to be assembled into the lens mount 20. This ensures that there is a first gap 23 between the inner wall 21 and the outer wall 11, and the first gap 23 is located above the contact surface 212. This prevents the lens 10 from being tilted or eccentric due to interference from the rest of the inner wall 21 when it is assembled into the lens mount 20, thereby improving assembly efficiency.

[0029] More preferably, the camera unit further includes a first elastic element 30, which is sandwiched between the lens 10 and the lens mount 20. The force of the first elastic element 30 in restoring its original shape is used to keep the external thread 111 and the internal thread 211 in contact. Considering that there is a gap between the external thread 111 and the internal thread 211, by placing the first elastic element 30 between the lens 10 and the lens mount 20, when tightening the external thread 111, the force of the first elastic element 30 in restoring its original shape can keep the external thread 111 and the internal thread 211 in contact at all times, reducing the error caused by the thread gap, and thus ensuring the positional accuracy of the lens 10. The first elastic element 30 can be a spring, a sealing ring, or other elastic structure.

[0030] More preferably, the camera unit further includes a fixing adhesive 100, which is disposed above the connection between the external thread 111 and the internal thread 211, for bonding and fixing the lens 10 and the lens mount 20. It should be noted that after the lens 10 and lens mount 20 have been focused, i.e., after their positions are determined, the fixing adhesive 100 is used to further bond and fix the lens 10 and lens mount 20 to prevent subsequent positional shifts, which could affect product yield.

[0031] Please refer to Figure 2 The camera unit provided in the second embodiment of this application further includes a first lens 40 and an adjustment bracket 50. The first lens 40 and the adjustment bracket 50 are connected by a first adhesive 200, and the first lens 40 is fixedly mounted on the top of the lens 10 via the adjustment bracket 50. The optical system of the camera unit is divided into two parts: the first lens 40 and the lens 10. During assembly, the position of the imaging surface of the camera unit is adjusted by controlling the assembly position of the first lens 40 and the lens 10, thereby achieving the overlap between the imaging surface and the photosensitive chip 80. The first lens 40 is used to solve the problem of the imaging surface being biased or tilted, thus improving the image quality.

[0032] It should be noted that the camera unit is an imaging system that requires the first lens 40 to work in conjunction with the lens 10 to achieve imaging. The imaging surface of the camera unit is determined by both the first lens 40 and the lens 10. When the positions of the first lens 40 and the lens 10 in the optical axis o are adjusted, the imaging surface of the camera unit will also change, that is, the positional relationship of the imaging surface on the lens mount 20 can be adjusted. For example, if the distance between the first lens 40 and the lens 10 increases by 0.01mm, the position of the imaging surface of the camera unit will change by 0.05mm.

[0033] More preferably, the adjustment bracket 50 and the lens 10 are connected by a thread. Similarly, the threaded connection can precisely control the position of the adjustment bracket 50 and the lens 10, that is, realize the position of the first lens 40 and the lens 10, and thus realize the control of the imaging surface of the camera unit.

[0034] More preferably, it also includes a second elastic element 60, which is sandwiched between the adjusting bracket 50 and the lens 10. The force of the second elastic element 60 returning to its original shape is used to keep the adjusting bracket 50 and the lens 10 in contact. By placing the second elastic element 60 between the adjusting bracket 50 and the lens mount 20, when the adjusting bracket 50 is tightened, the force of the second elastic element 60 returning to its original shape can keep the adjusting bracket 50 and the lens mount 20 in contact at all times, reducing the error caused by the thread clearance, thereby ensuring the positional accuracy of the lens 10. The second elastic element 60 can be a spring, a sealing ring, or other elastic structure.

[0035] Please refer to Figure 3 The imaging unit provided in the third embodiment of this application further includes a first lens 40 and a screw cap 70, the screw cap 70 being used to press the first lens 40 onto the top of the lens 10. The difference from the second embodiment is that in the third embodiment, the first lens 40 is disposed on the top of the lens 10 by the screw cap 70, and the screw cap 70 is used to limit and fix the first lens 40.

[0036] More preferably, the camera unit further includes a second adhesive 300, which is used to bond the first lens 40 to the top of the lens 10. The second adhesive 300 is disposed between the first lens 40 and the top of the lens 10, so that the second adhesive 300 can limit the distance between the first lens 40 and the lens 10, thereby limiting the position of the imaging surface of the camera unit. For the convenience of the third embodiment, the assembly method of the camera unit of the third embodiment is described here. First, a flexible pad is provided and disposed on the top of the lens 10. The first lens 40 is disposed above the flexible pad and pressed by the screw cap 70 to adjust the positional relationship between the first lens 40 and the lens 10, preventing the first lens 40 from tilting or becoming eccentric. After determining the positional relationship between the first lens 40 and the lens 10, the screw cap 70 is loosened and the flexible gasket is removed. The first lens 40 and the lens 10 are then readjusted to their corresponding positions using the second adhesive 300, and the first lens 40 is fixed in place using the second adhesive 300, thus completing the assembly of the first lens 40. Finally, the screw cap 70 is reattached to the lens 10 to define the first lens 40. By controlling the second adhesive 300 to readjust the distance between the first lens 40 and the lens 10, the imaging surface of the camera unit is positioned optimally, thus determining that the distance from the bottom of the lens mount 20 to the imaging surface is optimal.

[0037] On the other hand, please refer to Figure 4This utility model provides a camera module, including a photosensitive chip 80, a circuit board 90, and the aforementioned camera unit. Both the photosensitive chip 80 and the camera unit are disposed on the circuit board 90. The photosensitive chip 80 is located directly below the lens 10 along the optical axis o. The photosensitive chip 80 is used to receive light passing through the camera unit, thereby completing the image formation.

[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A camera unit, characterized in that, include: A lens, the lens including an outer wall, the outer wall being provided with external threads; A lens mount, the lens mount including an inner wall, the inner wall being provided with an internal thread and a contact surface, the contact surface protruding from the inner wall and close to the optical axis of the lens; The lens and the lens mount are fixedly connected by the external thread and the internal thread, and the outer wall abuts against the contact surface.

2. The camera unit according to claim 1, characterized in that, The mirror base also includes a bottom surface, and the contact surface is disposed at one end of the mirror base near the bottom surface; there is a first gap between the inner wall and the outer wall, and the first gap is located above the contact surface.

3. The camera unit according to claim 1, characterized in that, The camera unit also includes a first elastic element, which is clamped between the lens and the lens mount. The force of the first elastic element returning to its original shape is used to keep the external thread and the internal thread in contact.

4. The camera unit according to claim 1, characterized in that, The camera unit also includes a fixing adhesive, which is disposed above the connection between the external thread and the internal thread, for bonding and fixing the lens and the lens mount.

5. The camera unit according to claim 1, characterized in that, The camera unit also includes a first lens and an adjustment bracket. The first lens is connected to the adjustment bracket by a first adhesive, and the first lens is fixedly mounted on the top of the lens by the adjustment bracket.

6. The camera unit according to claim 5, characterized in that, The adjustment bracket is connected to the lens via a thread.

7. The camera unit according to claim 6, characterized in that, It also includes a second elastic element, which is clamped between the adjustment bracket and the lens. The force of the second elastic element returning to its original shape is used to keep the adjustment bracket and the lens in contact.

8. The camera unit according to claim 1, characterized in that, The camera unit also includes a first lens and a screw cap, the screw cap being used to press the first lens onto the top of the lens.

9. The camera unit according to claim 8, characterized in that, The camera unit also includes a second adhesive for bonding the first lens to the top of the lens.

10. A camera module, characterized in that, The device includes a photosensitive chip, a circuit board, and a camera unit as described in any one of claims 1-9, wherein the photosensitive chip and the camera unit are both disposed on the circuit board, and the photosensitive chip is located directly below the lens along the optical axis.

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