WO2021203244A1

WO2021203244A1 - Lens holder, optical filter assembly, camera module and mobile terminal having same

Info

Publication number: WO2021203244A1
Application number: PCT/CN2020/083566
Authority: WO
Inventors: 陈振中
Original assignee: 南昌欧菲光电技术有限公司
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2021-10-14

Abstract

A lens holder (10). The lens holder (10) is of a hollow structure. One end of the lens holder (10) is provided with a mounting slot (12) used for mounting an optical filter (20). The surface of the slot bottom wall of the mounting slot (12) forms a mounting surface (121). The slot bottom wall of the mounting slot (12) is provided with glue avoiding recesses (13) that are recessed downward with respect to the mounting surface (121) and used for avoiding glue. Also provided are an optical filter assembly comprising the lens holder (10), a camera module, and a mobile terminal.

Description

Lens holder, filter assembly, camera module and mobile terminal with the same

Technical field

The present disclosure relates to the field of optical lenses, and in particular, to a lens holder, a filter assembly, a lens module, and a mobile terminal having the same.

Background technique

The lens modules on mobile terminals (such as mobile phones) tend to be miniaturized and ultra-thin. In this way, when the lens module uses ultra-thin filters, such as phosphate filters, the filters can be glued Adhesive to the lens holder, there will be a high temperature and high humidity environment during the assembly process or use of the lens module. Since the thermal expansion coefficient of the filter is lower than that of glue, it is easy to cause the above high temperature and high humidity environment. The filter is cracked.

Summary of the invention

The present disclosure aims to solve at least one of the technical problems existing in the prior art. To this end, an objective of the present disclosure is to provide a lens holder, a filter assembly, a camera module, and a mobile terminal having the same.

According to the lens holder of the filter assembly of the embodiment of the first aspect of the present disclosure, the lens holder has a hollow structure, one end of the lens holder has an installation groove for installing the filter, and the groove bottom wall of the installation groove The surface of the mounting groove is formed as a mounting surface, and the bottom wall of the mounting groove is provided with a glue avoiding groove recessed downward relative to the mounting surface for avoiding glue.

According to the lens holder of the lens module of the embodiment of the present disclosure, a glue avoiding groove is provided on the bottom wall of the mounting groove, so that when the filter is adhered to the mounting surface of the bottom wall of the mounting groove, the filter and the avoiding The area corresponding to the glue groove can avoid the glue, so as to reduce the stress or strain concentration of the filter and reduce the risk of cracks in the filter.

In some embodiments, the glue avoiding groove is opened at at least one corner of the mounting surface. Since cracks and stress concentration are more likely to occur at the corners, the glue avoiding grooves are arranged at the corners of the installation groove to improve the effect of cracks.

In some embodiments, the outer contour of the mounting surface is rectangular. Therefore, the rectangular mounting surface can provide circumferential positioning for the mounting of the filter, which improves the assembly efficiency.

In some embodiments, the outer contour of the mounting surface is square, and the glue avoiding grooves are provided at four corners. As a result, the four-corner sinking reduces the number of cracks by 29% compared to the one-corner sinking, which further reduces the risk of cracks.

In some embodiments, the sinking depth of the glue avoidance groove is 0.05mm-2mm. Therefore, the use of the above-mentioned depth of the glue avoidance groove avoids weakening the strength of the lens holder.

In some embodiments, the opening shape of the glue avoiding groove on the mounting surface is any one of a triangle, a square, a semicircle, an ellipse, and a circle. Therefore, the glue avoiding groove with the above-mentioned shape is more convenient for processing and production.

In some embodiments, the shape of the opening of the glue avoidance groove on the mounting surface is an isosceles right triangle, and the junction of the side walls of the glue avoidance groove transitions through rounded corners. Therefore, the use of the glue avoidance groove of the above-mentioned shape and the rounded corner design avoids the local accumulation of too much glue at the junction of the glue avoidance groove and the surface.

A filter assembly according to an embodiment of the second aspect of the present disclosure includes: the lens holder and a filter, the filter and the surface of the bottom wall of the mounting groove are bonded by glue, and the filter At least one corner of the light sheet is suspended above the glue avoiding groove. As a result, the filter extends into the lens holder and is glued to the mounting surface of the installation groove. At least one corner of the filter is suspended above the glue avoiding groove, which can avoid the glue and reduce the corners of the filter. The stress or strain concentration at the location reduces the risk of cracks in the filter and improves the product yield.

In some embodiments, the filter is blue glass made of phosphate. Since the expansion coefficient of phosphate blue glass is quite different from that of glue, the design of the glue avoidance tank is especially suitable for phosphate blue glass, which can effectively alleviate cracks in blue glass.

The camera module according to an embodiment of the third aspect of the present disclosure includes the aforementioned filter assembly. In this way, the camera module can balance the color of the picture taken and restore the true color.

A mobile terminal according to an embodiment of the fourth aspect of the present disclosure includes the aforementioned camera module. In the mobile terminal adopting the above-mentioned camera module, the filter of the camera module is less prone to cracks, the quality is more reliable, and the lighter and thinner.

The additional aspects and advantages of the present disclosure will be partially given in the following description, and some will become obvious from the following description, or be understood through the practice of the present disclosure.

Description of the drawings

The above and/or additional aspects and advantages of the present disclosure will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

Fig. 1 is a schematic diagram of a lens holder according to an embodiment of the present disclosure.

Fig. 2 is a schematic cross-sectional view of a lens holder according to an embodiment of the present disclosure.

Fig. 3 is a schematic diagram of a filter assembly according to an embodiment of the present disclosure.

Fig. 4 is another schematic diagram of a filter assembly according to an embodiment of the present disclosure.

Fig. 5 is a schematic diagram of a lens holder according to another embodiment of the present disclosure.

Fig. 6 is a schematic cross-sectional view of a lens holder according to another embodiment of the present disclosure.

Fig. 7 is a schematic diagram of a filter assembly according to another embodiment of the present disclosure.

FIG. 8 is a schematic cross-sectional view of a filter assembly according to another embodiment of the present disclosure.

Reference signs:

Lens holder 10, lens mounting hole 11, mounting groove 12, mounting surface 121, glue avoiding groove 13,

The filter 20, the corner 21 of the filter.

Detailed ways

The embodiments of the present disclosure are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary, and the embodiments of the present disclosure are described in detail below.

The camera module and lens holder 10 according to an embodiment of the present disclosure will be described below with reference to FIGS. 1 to 8.

As shown in FIGS. 1 and 5, according to the lens holder 10 of the camera module of the embodiment of the present disclosure, the lens holder 10 has a hollow structure, and one end of the lens holder 10 has a mounting groove 12 for installing the filter 20, and the mounting groove The surface of the bottom wall of the groove 12 is formed as a mounting surface 121, and the bottom wall of the mounting groove 12 is provided with a glue avoiding groove 13 recessed downward relative to the mounting surface 121 for avoiding glue.

Specifically, the IR surface of the filter 20 can be attached to the mounting surface 121 of the bottom wall of the groove by glue mounting. The glue avoidance groove 13 is formed by a partial depression of the bottom wall of the installation groove 12. In other words, the glue avoidance groove 13 can be a groove formed on the bottom wall of the installation groove 12, and the glue is only applied to the bottom wall of the groove during bonding. The mounting surface 121 avoids the glue avoiding groove 13, that is, no glue is set in the glue avoiding groove 13.

According to the lens holder 10 of the lens module of the embodiment of the present disclosure, the glue avoiding groove 13 is provided on the bottom wall of the mounting groove 12, so that when the filter 20 is adhered to the mounting surface 121 of the bottom wall of the mounting groove 12 The area of the filter 20 corresponding to the glue avoiding groove 13 can avoid the glue, so as to reduce the stress or strain concentration of the filter 20 and reduce the risk of cracks in the filter 20.

The glue avoiding groove 13 is opened at at least one corner of the mounting surface 121. Among them, the shape of the filter 20 is substantially the same as the shape of the mounting groove 12, and the corner 21 of the filter 20 is opposite to the corner of the mounting groove 12 during assembly. Since cracks and stress concentration are more likely to occur at the corners, the glue avoiding groove 13 is arranged at the corners of the installation groove 13 to improve the effect of cracks.

The glue avoidance groove 13 can be directly formed by a part of the corners recessed downward, or it can be recessed to form the glue avoidance groove 13 at a certain distance near each corner. The above embodiments all fall into the glue avoidance groove 13 located on the side of the installation groove 12 The category at the corner.

In the specific embodiment shown in FIG. 1, the glue avoidance groove 13 is formed by sinking the corners of the groove bottom wall of the installation groove 12. This not only facilitates the processing, but also enables the corners of the filter 20 to be completely suspended after installation, reducing the stress on the corners.

In some embodiments, the outer contour of the mounting surface 121 is rectangular, which can provide circumferential positioning for the installation of the filter 20 and improve the assembly efficiency.

In some embodiments, the mounting groove 12 is square, and four corners are provided with glue avoiding grooves 13. FIGS. 1-2 show the lens holder 10 according to an embodiment of the disclosure, and FIGS. 3-4 show the assembly structure of the lens holder 10 and the filter 20 of this embodiment. In the above embodiment, the glue avoiding groove 13 is located at one corner of the installation groove 12.

FIGS. 5-6 show the lens holder 10 according to an embodiment of the disclosure, and FIGS. 7-8 show the assembly structure of the lens holder 10 and the filter 20 according to this embodiment. In the above embodiment, the four corners of the installation groove 12 are provided with glue avoidance grooves 13. As shown in Figs. 5-6, the four corners of the installation groove 12 are sunk to form a glue avoiding groove 13, and the four glue avoiding grooves 13 can be distributed symmetrically in the center. As a result, the four-corner sinking reduces the number of cracks by 29% compared to the one-corner sinking, further reducing the risk of cracks.

In some embodiments, the glue avoiding groove 13 is located in a corner area, and the corner area is defined as: the area outside the ring that is concentric with the lens mounting hole 11 and tangent to at least one outer edge of the groove bottom wall . In this way, the glue avoiding groove 13 is arranged in the above-mentioned corner area, so that the contact area between the filter 20 and the mounting surface 121 can be more evenly distributed in the circumferential direction, and the effect of improving stress concentration is better.

Specifically, the mounting groove 12 is a square, a circular ring is inscribed on the outer edge of the mounting groove 12 and four corner areas are defined between the two, and at least one of the four corner areas is provided with a glue avoiding groove 13. In other words, only one of the four corner areas may be provided with the glue avoiding groove 13 or the four corner areas may be recessed and formed with the glue avoiding groove 13.

Further, the glue avoiding groove 13 is spaced apart from the ring, and the distance between the glue avoiding groove 13 and the ring in the radial direction is 0.5-1.5 times the maximum size of the glue avoiding groove 13 in the radial direction. In this way, a sufficient bonding surface can be ensured, and the corners 21 of the filter 20 can be suspended, so that the stability and reliability of the connection between the filter 20 and the lens holder 10 are taken into account while avoiding cracks.

In some embodiments, the sinking depth of the glue avoiding groove 13 is 0.05 mm-2 mm. Therefore, the use of the glue avoiding groove 13 with the above-mentioned depth avoids weakening the strength of the lens holder 10.

In some embodiments, the opening shape of the glue avoiding groove 13 on the mounting surface 121 is any one of a triangle, a square, a semicircle, an ellipse, and a circle. Therefore, the glue avoiding groove 13 with the above-mentioned shape is more convenient for processing and production.

Specifically, the glue avoiding groove 13 may be a counterbore with a constant cross section or gradually expanding from bottom to top. The size of the counterbore can be designed according to the actual allowable space from 0.5mm-3mm.

In some embodiments, the opening shape of the glue avoiding groove 13 on the mounting surface 121 is an isosceles right triangle, and the sidewalls of the glue avoiding groove 13 transition through rounded corners. Therefore, the use of the glue avoidance groove 13 of the above-mentioned shape and the rounded corner design avoids the local accumulation of too much glue at the junction between the glue avoidance groove 13 and the surface.

The filter assembly according to the embodiment of the second aspect of the present disclosure includes: the lens holder 10 and the filter 20 of the above embodiment, the filter 20 and the surface of the bottom wall of the mounting groove 12 are bonded by glue, and the filter At least one corner of the sheet 20 is suspended above the glue avoiding groove 13. As a result, the filter 20 extends into the lens holder 10 and is glued to the mounting surface 121 of the mounting groove. At least one corner of the filter 20 is suspended above the glue avoiding groove 13, so that the glue can be avoided and the glue is reduced. The stress or strain concentration at the corners of the filter 20 reduces the risk of cracks in the filter 20 and improves the product yield.

In some embodiments, the filter 20 is blue glass made of phosphate. The filter can filter infrared and ultraviolet light invisible to the human eye. Since the expansion coefficient of blue glass made of phosphate is quite different from that of glue, the design of the glue avoidance tank 13 is especially suitable for blue glass made of phosphate, which can effectively alleviate cracks in blue glass.

In some embodiments, the thickness of the filter 20 is 0.2 mm-0.3 mm. Therefore, the thinner filter 20 is used to make the camera module more compact, and the design of the glue avoiding groove 13 is particularly suitable for crack prevention of the filter 20 with the above thickness.

The mobile terminal according to the embodiment of the fourth aspect of the present disclosure includes the camera module of the above-mentioned embodiment. In the mobile terminal using the above-mentioned camera module, the filter 20 of the camera module is less prone to cracks, the quality is more reliable, and the lighter and thinner.

In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Axial", "Radial", "Circumferential" The orientation or positional relationship of other indications is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation or a specific orientation. The azimuth structure and operation cannot be understood as a limitation of the present disclosure.

In the description of the present disclosure, “first feature” and “second feature” may include one or more of these features. In the description of the present disclosure, "plurality" means two or more. In the description of the present disclosure, the "above" or "below" of the first feature of the second feature may include the first and second features in direct contact, or may include the first and second features not in direct contact but through them Another feature contact between. In the description of the present disclosure, “above”, “above” and “above” the second feature of the first feature includes the first feature directly above and diagonally above the second feature, or only means that the first feature is higher than The second feature.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples" etc. means to incorporate the implementation The specific features, structures, materials or characteristics described by the examples or examples are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example.

Although the embodiments of the present disclosure have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and modifications can be made to these embodiments without departing from the principle and purpose of the present disclosure. The scope of the present disclosure is defined by the claims and their equivalents.

Claims

A lens holder for a filter assembly, characterized in that the lens holder has a hollow structure, one end of the lens holder has an installation groove for installing the filter, and the surface of the groove bottom wall of the installation groove is formed As the mounting surface, the bottom wall of the mounting groove is provided with a glue avoiding groove recessed downward relative to the mounting surface for avoiding glue.
The mirror holder according to claim 1, wherein the glue avoiding groove is opened in at least one corner of the mounting surface.
The mirror holder according to claim 2, wherein the outer contour of the mounting surface is rectangular.
The mirror holder according to claim 3, wherein the outer contour of the mounting surface is square, and the glue avoiding grooves are provided at four corners.
The lens holder according to any one of claims 1 to 4, wherein the depth of the glue avoiding groove is 0.05mm-2mm.
The lens holder according to any one of claims 1-4, wherein the shape of the opening of the glue avoiding groove on the mounting surface is any of a triangle, a square, a semicircle, an ellipse, and a circle. A sort of.
The lens holder according to claim 6, wherein the shape of the opening of the glue avoiding groove on the mounting surface is an isosceles right triangle, and the side wall connection of the sinking portion transitions through rounded corners.
A filter assembly, characterized in that it comprises:

The lens holder according to any one of claims 1-7; and

The optical filter, the surface of the optical filter and the bottom wall of the mounting groove are bonded by glue, and at least one corner of the optical filter is suspended above the sinking portion.
8. The filter assembly of claim 8, wherein the filter is blue glass made of phosphate.
A camera module, characterized by comprising the filter assembly according to any one of claims 8-9.
A mobile terminal, characterized by comprising the camera module according to any one of claims 10.