CN115113357A

CN115113357A - Embedded lens structure, embedded lens mold and injection molding method

Info

Publication number: CN115113357A
Application number: CN202211036487.XA
Authority: CN
Inventors: 杨宇航; 李旦; 郭崇波; 李仕豪; 李亮
Original assignee: Jiangxi Lianyi Optics Co Ltd
Current assignee: Jiangxi Lianyi Optics Co Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-09-27
Anticipated expiration: 2042-08-29
Also published as: CN115113357B

Abstract

The invention relates to the technical field of lenses, in particular to a fitting type lens structure, a fitting lens mold and an injection molding method. This kind of coincide formula camera lens structure is at least including two pieces of coincide lens of the formula combination of meshing, the meshing lens is including not participating in optical imaging's equipment district, and is adjacent be provided with the meshing structure on two pieces of meshing lens, the meshing structure is including sunken in the concave structure in the equipment district of one of them meshing lens and protruding in the protruding structure in the equipment district of another meshing lens, concave structure and protruding structure cooperate, the edge of meshing lens is provided with the section difference structure that is used for the drawing of patterns. The embedded lens structure is provided with the step difference structure for demolding at the edge of the embedded lens, so that the three-stage step-shaped structure is formed at the edge, the embedded lens structure is suitable for a mold stripping mode of mold core ejection, and compared with the traditional integrated mold stripping mode, the mode can ensure that the stress in the mold stripping process is more uniform, and the eccentric influence on a product is smaller.

Description

Embedded lens structure, embedded lens mold and injection molding method

Technical Field

The invention relates to the technical field of lenses, in particular to a fitting type lens structure, a fitting lens mold and an injection molding method.

Background

With the continuous iterative development of the mobile phone market, the high performance of various aspects becomes a field in which manufacturers compete, and among them, a mobile phone lens with higher pixels and high quality is one of the hottest fields. The method lays the foundation for the development of the mobile phone lens in more directions, and in order to achieve the purpose, the development of a lens structure which is more suitable for more lens combinations is also important besides improving the level of the optical design.

In a traditional mobile phone lens structure, lenses are often combined together in a simple stacking manner, that is, only a bearing surface in the horizontal direction exists between the lenses. The structure enables the lenses to be restricted in the horizontal direction only through the inner diameter of the lens barrel. That is, the coaxiality between the lenses is completely limited by the coaxiality of the inner diameters of the lens barrels. Such a configuration may also be applicable to low-end lenses with a small number of lenses and less stringent imaging quality of the lenses. As the number of lenses increases, the requirements on the imaging quality become more stringent, and the effect of decentering the elements between the lenses on the final imaging result is quite large. In addition, the lens structure after optical design is different in shape actually, so that the structural design space of the lens is narrow by adopting a simple stacking mode. In addition, the traditional lens demoulding mode is often an integrated demoulding mode, namely the lens and the flow channel are taken out as a whole at one time, and the demoulding mode can not keep balance in the demoulding process of the lens, so that some micro deformation problems are easily caused, further the eccentricity is poor, and certain influence is also caused on the surface type of the lens.

Disclosure of Invention

The present invention is directed to at least one of the technical problems in the prior art, and provides a snap-fit lens structure, a snap-fit lens mold, and an injection molding method.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a matched lens structure at least comprises two matched lenses which are combined in a matched mode, wherein each matched lens comprises an assembling area which does not participate in optical imaging, matched structures are arranged on the two adjacent matched lenses, and the two adjacent matched lenses are connected together in an abutted mode through the matched structures; the matched structure comprises a concave structure sunken in an assembly area of one matched lens and a convex structure protruded in an assembly area of the other matched lens, the concave structure is matched with the convex structure, the matched structure comprises inclined contact surfaces abutted by the two matched lenses, the inclination angle alpha of the inclined contact surfaces is more than or equal to 20 degrees and less than or equal to 30 degrees, and the assembly area is provided with a groove corresponding to the convex structure; the edge of the fitting lens is provided with a step structure for demolding, and three-stage stepped structures are respectively formed on the upper edge and the lower edge of the fitting lens by the step structure.

Furthermore, the upper end and the lower end of the inclined contact surface are respectively connected with a horizontal plane.

Further, the length of the inclined contact surface is at least 0.05 mm.

Furthermore, the assembly area comprises an upper contact surface and a lower contact surface, and if the convex structure is arranged on the upper contact surface, the groove is arranged on the lower contact surface corresponding to the convex structure; if the convex structure is arranged on the lower contact surface, the groove is arranged on the upper contact surface corresponding to the convex structure.

Further, the recess is V style of calligraphy structure, V style of calligraphy structure includes outer recess face and interior recess face, the contained angle of outer recess face and interior recess face is 70 at least.

Furthermore, the convex structure comprises an outer inclined plane, a plane and an inner inclined plane which are sequentially connected from outside to inside, wherein the outer inclined plane is parallel to the outer groove surface, and the inner inclined plane is parallel to the inner groove surface.

Furthermore, the section difference structure is a right-angle structure.

The invention also provides a die for manufacturing the fitting lens, which is used for forming the fitting lens and comprises an upper die core, an inner lower die core and an outer lower die core, wherein the upper die core is used for forming the upper surface of the fitting lens, the inner lower die core is used for forming the lower surface of the fitting lens, the outer lower die core is used for forming the side surface of the fitting lens, and the section difference structure is used as a bearing structure matched with the inner lower die core.

Furthermore, the upper mold core forms a concave structure or a convex structure on the upper surface of the fitting lens, and the inner lower mold core forms a convex structure or a concave structure on the lower surface of the fitting lens.

Furthermore, the upper mold core or the inner lower mold core is formed with a groove corresponding to the convex structure.

The invention also provides an injection molding method of the fitting lens, which uses the mold for injection molding and comprises the following steps:

injecting the plastic into the mold to form the fitting lens in the mold;

separating the upper mold core to demould the matched lens and the upper mold core;

then the outer lower mold core is ejected upwards, so that the matched lens and the inner lower mold core are demoulded;

and finally, ejecting the matched lens upwards to enable the matched lens and the outer lower die core to be demoulded.

As can be seen from the above description of the present invention, compared with the prior art, the present invention includes at least one of the following advantages:

1. the embedded lens structure adopts an embedded structure and a structure to ensure that two embedded lenses are matched together; the traditional lens is difficult to achieve better coaxiality, and the performance of the lens is influenced greatly; the convex structures and the concave structures are respectively arranged on the two fitting lenses to be matched, and the ridge and the step are integrally processed with the aspheric surfaces of the lenses, so that the processing precision of the aspheric surfaces of the ridge and the step can be achieved, the coaxiality between the lenses can be greatly improved, and the control on the precision of the lens cone can be correspondingly relaxed; and the bank and the structure can also better improve the space utilization rate and the design freedom degree of the inner part of the lens cone.

2. The fitting structure comprises inclined contact surfaces, the contact area of the fitting structure is increased, the bearing stability between the two fitting lenses is improved, in order to ensure the stress consistency of different assembled threshold and contact positions of the threshold and the structure, the angles of a plurality of groups of thresholds and the structure are kept consistent, the inclination angle alpha range of the thresholds and the angles, namely the inclined contact surfaces, is more than or equal to 20 degrees and less than or equal to 30 degrees, the angle range can better meet the stress requirement between the two lenses through verification, and the whole structure is more stable; the assembly area is additionally provided with a groove, and the groove reduces the thickening effect of the convex structure on the fitting lens.

3. The embedded lens structure is provided with the step difference structure for demolding at the edge of the embedded lens, so that the three-stage stepped structure is formed at the edge, and the embedded lens structure is suitable for a mold stripping mode in which a mold core is ejected. The invention can greatly improve the manufacturing precision of the lens and greatly reduce the influence of the manufacturing error on the design performance of the lens.

4. The mold for manufacturing the embedded lens comprises an upper mold core, an inner lower mold core and an outer lower mold core, wherein the side surface and the lower surface of the embedded lens are respectively molded by the outer lower mold core and the inner lower mold core, so that a sectional demolding mode can be realized, the stress in the demolding process is more uniform, and the quality of the embedded lens is improved; the structure within the poor structure of section belongs to the mechanism that needs the strict control precision, be convenient for control precision by last benevolence and interior lower mould benevolence shaping, the assembly position that the lens was closed in the bank is controlled the assembly by the bank structure, need not cooperate with lens-barrel or spacer ring, consequently the side reason of the bank lens is the structure beyond the poor structure of section, do not need too high required precision, adopt the manufacturing cost of the reducible mould in side of outer lower mould benevolence independent shaping bank lens, the mould segmentation drawing of patterns of different required precision can improve the quality that the lens was closed in the bank.

5. The injection molding method of the fitting lens adopts a mold stripping mode of ejecting the sectional mold core to demold, thereby improving the manufacturing precision of the fitting lens.

Drawings

Fig. 1 is a schematic structural diagram of a collapsible lens structure according to a preferred embodiment of the present invention;

FIG. 2 is a partial schematic view of a fitting lens according to a preferred embodiment of the present invention;

FIG. 3 is a schematic view of a mold for manufacturing a fitting lens according to a preferred embodiment of the present invention;

FIG. 4 is an enlarged view of FIG. 3 at A;

reference numerals: 1. fitting the lens; 2. fitting structure; 3. an upper die core; 4. an inner lower mold core; 5. an outer lower mold core; 11. an assembly area; 12. a segment difference structure; 13. a groove; 21. a convex structure; 22. a concave structure; 23. an inclined contact surface; 111. an upper contact surface; 112. a lower contact surface; 131. an outer groove surface; 132. an inner groove surface; 221. an outer bevel; 222. an inner bevel.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-2, in a preferred embodiment of the present invention, an embedded lens structure at least includes two embedded lenses 1 that are embedded and combined, where the embedded lenses 1 include an assembly area 11 that does not participate in optical imaging, and two adjacent embedded lenses 1 are provided with embedded structures 2, and the two adjacent embedded lenses 1 are abutted together through the embedded structures 2; the fitting structure 2 comprises a concave structure 22 recessed in the assembling area 11 of one fitting lens 1 and a convex structure 21 protruding from the assembling area 11 of the other fitting lens 1, the concave structure 22 is matched with the convex structure 21, the fitting structure 2 comprises inclined contact surfaces 23 abutted by the two fitting lenses 1, the inclination angle alpha of each inclined contact surface 23 is more than or equal to 20 degrees and less than or equal to 30 degrees, and the assembling area 11 is provided with a groove 13 corresponding to the convex structure 21; the edge of the fitting lens 1 is provided with a step structure 12 for demolding, and the step structure 12 is formed with three-stage stepped structures at the upper and lower edges of the fitting lens 1.

The embedded lens structure of the invention adopts an embedded and matched structure to ensure that two embedded lenses 1 are matched together; the traditional lens is difficult to achieve better coaxiality, and the performance of the lens is influenced greatly; the convex structure 21 and the concave structure 22 are respectively arranged on the two fitting lenses 1 to be matched by adopting the ridges and the structures, and the ridges and the steps can achieve the processing precision of the aspheric surfaces because the ridges and the steps are integrally processed with the aspheric surfaces of the lenses, so that the coaxiality between the lenses can be greatly improved, and the precision control of the lens cone can be correspondingly relaxed; and the bank and the structure can also better improve the space utilization rate and the design freedom degree of the inner part of the lens cone.

The fitting structure 2 comprises the inclined contact surface 23, the contact area of the fitting structure 2 is increased, the bearing stability between the two fitting lenses 1 is improved, in order to ensure the stress consistency of different assembled fitting and contact positions of the fitting and the structure, the angles of a plurality of groups of fitting and the structure are kept consistent, the angle range of the fitting and the angle, namely the inclination angle alpha of the inclined contact surface 23, is more than or equal to 20 degrees and less than or equal to 30 degrees, the angle range can better meet the stress requirement between the two lenses through verification, and the whole structure is more stable; the assembly zone 11 adds a groove 13, the groove 13 reducing the thickening effect of the raised structure 21 on the snap lens 1.

The embedded lens structure is provided with the step difference structure 12 for demoulding at the edge of the embedded lens 1 so as to form a three-stage step-shaped structure at the edge, so that the embedded lens structure is suitable for a mould stripping mode of ejecting a mould core. The invention can greatly improve the manufacturing precision of the lens and greatly reduce the influence of the manufacturing error on the design performance of the lens.

As a preferred embodiment of the present invention, it may also have the following additional technical features:

in this embodiment, the upper and lower ends of the inclined contact surface 23 are connected to horizontal surfaces, respectively. The upper and lower ends of the inclined contact surface 23 are respectively connected with a horizontal plane, which is convenient for manufacturing and assembling.

In this embodiment, the length of the inclined contact surface 23 is at least 0.05 mm. In order to ensure that the inclined contact surface 23 has a sufficient contact position and that the subsequent measurement can be performed smoothly, the inclined contact distance, i.e. the length of the inclined contact surface 23, should be at least 0.05 mm.

In the present embodiment, the assembly region 11 includes an upper contact surface 111 and a lower contact surface 112, and if the convex structure 21 is disposed on the upper contact surface 111, the groove 13 is disposed on the lower contact surface 112 corresponding to the position of the convex structure 21; if the male formation 21 is provided on the lower contact surface 112, the recess 13 is provided on the upper contact surface 111 corresponding to the position of the male formation 21. The groove 13 reduces the thickening effect of the convex structure 21 on the fitting lens 1, so that the thickness of the assembling area 11 of the fitting lens 1 is kept consistent as much as possible, and the flow resistance of the inner ring and the outer ring can be close to consistency as much as possible when the melt flows to the position of the convex structure 21 in the injection molding process, so that the molding quality is more uniform, and more molding defects are avoided.

In this embodiment, the groove 13 is a V-shaped structure, the V-shaped structure includes an outer groove surface 131 and an inner groove surface 132, an included angle between the outer groove surface 131 and the inner groove surface 132 is at least 70 °, the protruding structure 21 includes an outer inclined surface 221, a plane, and an inner inclined surface 222, which are sequentially connected from outside to inside, the outer inclined surface 221 is parallel to the outer groove surface 131, and the inner inclined surface 222 is parallel to the inner groove surface 132. The outer groove surface 131 and the inner groove surface 132 of the groove 13 are parallel to the outer inclined surface 221 and the inner inclined surface 222 of the male structure 21, respectively, so that the flow resistance of the inner ring and the outer ring can be as close to the same as possible when the melt flows to the positions of the ridge and the male closure structure in the injection molding process, and the molding quality is more uniform. The angle between the outer groove surface 131 and the inner groove surface 132 must not be too small, typically at least 70 °, in order to ensure the feasibility of the tooling.

In the present embodiment, the level difference structure 12 is a right-angle structure. The segment difference structure 12 is a right-angle structure, which is convenient for design and processing, and the upper and lower edges of the fitting lens 1 are formed with a three-stage stair-shaped structure by the right-angle structure.

Referring to fig. 3 to 4, the present invention further provides a mold for manufacturing a fitting lens, which is used for molding the fitting lens 1, and includes an upper mold core 3, an inner lower mold core 4, and an outer lower mold core 5, where the upper mold core 3 is used for molding an upper surface of the fitting lens 1, the inner lower mold core 4 is used for molding a lower surface of the fitting lens 1, the outer lower mold core 5 is used for molding a side surface of the fitting lens 1, and the step structure 12 is used as a bearing structure matched with the inner lower mold core 4.

The mold for manufacturing the fitting lens comprises an upper mold core 3, an inner lower mold core 4 and an outer lower mold core 5, wherein the side surface and the lower surface of the fitting lens 1 are respectively formed by the outer lower mold core 5 and the inner lower mold core 4, and the section difference structure 12 is used as a bearing structure matched with the inner lower mold core 4, so that a sectional type demolding mode can be realized, the stress in the demolding process is more uniform, and the quality of the fitting lens 1 is improved. The structure within the poor structure 12 of section belongs to the mechanism that needs strict control precision, be convenient for control precision by the shaping of upper die benevolence 3 and interior lower mould benevolence 4, the assembly position of the lens 1 that closes of threshold is controlled the assembly by the threshold structure 2, do not need to cooperate with lens cone or space ring, consequently the marginal structure outside the poor structure 12 of section promptly of the lens 1 of threshold, do not need too high required precision, adopt the manufacturing cost of the reducible mould in the side of the lens 1 of outer lower mould benevolence 5 independent shaping threshold, the mould segmentation drawing of patterns of different required precision can improve the quality of the lens 1 that closes of threshold.

In this embodiment, the upper mold core 3 forms the concave structure 22 or the convex structure 21 on the upper surface of the snap lens 1, and the inner lower mold core 4 forms the convex structure 21 or the concave structure 22 on the lower surface of the snap lens 1. The concave structure 22 and the convex structure 21 of the fitting structure 2 are respectively formed on the two fitting lenses 1, for the convenience of assembly, the concave structure 22 is generally arranged on the upper surface of the fitting lens 1 and is formed by the upper mold core 3, and the convex structure 21 is arranged on the lower surface of the fitting lens 1 and is formed by the inner lower mold core 4.

In this embodiment, the upper mold core 3 or the inner lower mold core 4 is formed with a groove 13 corresponding to the convex structure 21. Through the upper die core 3 or the inner lower die core 4 forming groove 13, the flow resistance of the inner ring and the outer ring can be as close as possible to be consistent when the melt flows to the positions of the ridges and the convex hulls in the injection molding process, and the forming quality is more uniform.

injecting the plastic into the mold to form the fitting lens 1 in the mold;

separating the upper mold core 3 to demould the embedded lens 1 and the upper mold core 3;

then the outer lower mold core 5 is ejected upwards, so that the matched lens 1 and the inner lower mold core 4 are demoulded;

and finally, ejecting the fitting lens 1 upwards to enable the fitting lens 1 and the outer lower die core 5 to be demoulded.

The injection molding method of the fitting lens adopts a mold stripping mode of ejecting the sectional mold core to demold, thereby improving the manufacturing precision of the fitting lens 1.

The above additional technical features can be freely combined and used in superposition by those skilled in the art without conflict.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The embedded lens structure is characterized by at least comprising two embedded lenses (1) which are embedded and combined, wherein each embedded lens (1) comprises an assembling area (11) which does not participate in optical imaging, the two adjacent embedded lenses (1) are provided with embedded structures (2), and the two adjacent embedded lenses (1) are connected together in an abutted mode through the embedded structures (2); the lens assembling structure comprises a matched structure (2) and a matched structure, wherein the matched structure (2) comprises a concave structure (22) sunken in an assembling area (11) of one matched lens (1) and a convex structure (21) protruded out of the assembling area (11) of the other matched lens (1), the concave structure (22) is matched with the convex structure (21), the matched structure (2) comprises inclined contact surfaces (23) which are abutted and connected with the two matched lenses (1), the range of the inclination angle alpha of each inclined contact surface (23) is more than or equal to 20 degrees and less than or equal to 30 degrees, and the assembling area (11) is provided with a groove (13) corresponding to the convex structure (21); the edge of the fitting lens (1) is provided with a step structure (12) for demolding, and the step structure (12) is respectively provided with a three-stage step structure at the upper edge and the lower edge of the fitting lens (1).

2. The lens structure of claim 1, wherein the upper and lower ends of the slanted contact surface (23) are connected to horizontal surfaces, respectively.

3. The lens structure of claim 1, wherein the length of the slanted contact surface (23) is at least 0.05 mm.

4. The lens structure of claim 1, wherein the assembly region (11) comprises an upper contact surface (111) and a lower contact surface (112), and if the convex structure (21) is disposed on the upper contact surface (111), the groove (13) is disposed on the lower contact surface (112) corresponding to the position of the convex structure (21); if the convex structure (21) is arranged on the lower contact surface (112), the groove (13) is arranged on the upper contact surface (111) corresponding to the position of the convex structure (21).

5. The lens structure of claim 1, wherein the groove (13) is a V-shaped structure, the V-shaped structure comprises an outer groove surface (131) and an inner groove surface (132), and the angle between the outer groove surface (131) and the inner groove surface (132) is at least 70 °.

6. The Kammable lens structure of claim 5, wherein the convex structure (21) comprises an outer inclined surface (221), a flat surface and an inner inclined surface (222) which are connected in sequence from outside to inside, the outer inclined surface (221) is parallel to the outer groove surface (131), and the inner inclined surface (222) is parallel to the inner groove surface (132).

7. The fitted lens structure according to claim 1, wherein the step structure (12) is a right-angled structure.

8. A mold for manufacturing a fitting lens, for molding a fitting lens (1) including any one of claims 1 to 7, comprising an upper mold core (3), an inner lower mold core (4), and an outer lower mold core (5), wherein the upper mold core (3) is used for molding an upper surface of the fitting lens (1), the inner lower mold core (4) is used for molding a lower surface of the fitting lens (1), the outer lower mold core (5) is used for molding a side surface of the fitting lens (1), and the step structure (12) is used as a bearing structure cooperating with the inner lower mold core (4).

9. The mold for manufacturing a snap-in lens according to claim 8, wherein the upper mold core (3) forms the concave structure (22) or the convex structure (21) on the upper surface of the snap-in lens (1), and the inner lower mold core (4) forms the convex structure (21) or the concave structure (22) on the lower surface of the snap-in lens (1).

10. The mold for manufacturing a snap-in lens according to claim 8, wherein the upper mold core (3) or the inner lower mold core (4) is formed with the concave groove (13) corresponding to the convex structure (21).

11. A method of injection molding a fitting lens using a mold comprising any one of claims 8-10, comprising the steps of:

injecting the plastic into the mold to form the fitting lens (1) in the mold;

separating the upper mold core (3) to demould the fitting lens (1) and the upper mold core (3);

then the outer lower die core (5) is pushed out upwards, so that the fitting lens (1) and the inner lower die core (4) are demoulded;

and finally, ejecting the fitting lens (1) upwards to demould the fitting lens (1) and the outer lower die core (5).