Image pickup lens unit manufacturing method and image pickup lens unit

Patent metadata

Field	Value
Publication number	US-9134499-B2
Application number	US-201113825288-A
Country	US
Kind code	B2
Filing date	Sep 9, 2011
Priority date	Sep 22, 2010
Publication date	Sep 15, 2015
Grant date	Sep 15, 2015

Abstract

An object is to provide a method for manufacturing an image pickup lens unit which can form a holder member with a small number of components, and can avoid generation or a ghost or flare caused by a positioning shape, an appearance problem, deterioration of dimension accuracy. In an installing step, since a lens 10 is positioned by one pressing member (protrusion) 61 d of protrusions 61 d and 62 d which are a pair of pressing members disposed in a position corresponding to a pair of openings OP 1 and OP 2 by molds 51 and 52 , it is possible to reliably fix the lens 10 in the molds 51 and 52 in a state of not affecting to a shape of a holder member 40 without interrupting the molding of the holder member 40 . Thus, it is possible to avoid deterioration of the dimension accuracy due to the remaining large positioning shape on the holder member 40 . In addition, since the holder member 40 is integrally molded, it is possible to avoid an increase of the number of components used for the assembling the holder or complicated component shapes of a connecting portion.

First claim

The invention claimed is:

1. A method for manufacturing an image pickup lens unit including a lens which has a first surface forming a first optical surface and a second surface forming a second optical surface on the opposite side to the first surface, and a holder member which is integrally molded for holding the lens in the inner portion in a state where the first and second optical surfaces are exposed, the method comprising:
disposing the lens in a mold having a molding space for molding the holder member;
performing positioning of the lens with respect to the mold in which a positioning member is provided so as to be in contact with the second surface of the lens by bringing the positioning member into contact with a bending part of the second surface of the lens;
fixing the lens with respect to the mold; and
molding the holder member which holds the lens in the inner portion by filling the molding space of the mold with a resin and solidifying, in a state where the lens is positioned and fixed with respect to the mold by contacting the positioning member of the mold to the second surface of the lens.

2. The method for manufacturing an image pickup lens unit according to claim 1 , wherein the second surface of the lens provides an inclined surface in the outer side with respect to the second optical surface, and the positioning member includes a contact surface facing the inclined surface provided on the second surface of the lens.

3. The method for manufacturing an image pickup lens unit according to claim 1 , wherein the positioning member has a circular shape.

4. The method for manufacturing an image pickup lens unit according to claim 1 , wherein the lens is fixed by pressing the first surface of the lens by a pressing member provided in the mold so as to be in contact with the first surface of the lens.

5. The method for manufacturing an image pickup lens unit according to claim 4 , wherein the positioning of the lens with respect to the mold is performed by bringing the pressing member into contact with the bending part of the first surface of the lens.

6. The method for manufacturing an image pickup lens unit according to claim 4 , wherein the pressing member has a circular shape.

7. The method for manufacturing an image pickup lens unit according to claim 4 , wherein one of the positioning member and the pressing member includes a contact surface which faces an inclined surface being formed into the peripheral part next to one of the first and second optical surfaces of the lens, and the other one of the positioning member and the pressing member includes a contact surface which faces the other one of the first and second optical surfaces of the lens and has substantially the same shape as the first or the second optical surface.

8. The method for manufacturing an image pickup lens unit according to claim 1 , wherein the lens and the mold are brought in contact by an elastic biasing force, when fixing the lens with respect to the mold.

9. The method for manufacturing an image pickup lens unit according to claim 8 , wherein a pressing member which presses the first surface of the lens is provided in the mold, and at least one of the positioning member and the pressing member is configured to be displace elastically with respect to a main body of the mold.

10. The method for manufacturing an image pickup lens unit according to claim 8 , wherein a pressing member which presses the first surface of the lens is provided in the mold, and at least one of the positioning member and the pressing member includes an elastic member configured to come into contact with at least a part of the first and second surfaces and undergo elastic deformation.

11. The method for manufacturing an image pickup lens unit according to claim 10 , wherein at least one of the positioning member and the pressing member includes the elastic member which come into contact with the first or second optical surface.

12. The method for manufacturing an image pickup lens unit according to claim 8 , wherein a pressing member which presses the first surface of the lens is provided in the mold, and at least one of the positioning member and the pressing member supports the first or second surface through a surface protection layer configured to coat (cover) at least a part of the first and second surfaces and undergo elastic deformation.

13. The method for manufacturing an image pickup lens unit according to claim 8 ,
wherein at least a part of the lens is formed by an elastic material configured to undergo elastic deformation, and
the positioning member supports at least one of the second optical surface and a remaining surface region except the second optical surface form the second surface.

14. The method for manufacturing an image pickup lens unit according to claim 8 ,
wherein at least a part of the lens is formed by an elastic material which is elastically deformable, and
a pressing member which presses the first surface of the lens is provided in the mold, and the pressing member supports at least one of the first optical surface and a remaining surface region except the first optical surface from the first surface.

15. The method for manufacturing an image pickup lens unit according to claim 13 , wherein the first or second surface is supported by a contact surface having substantially the same shape.

16. The method for manufacturing an image pickup lens unit according to claim 1 , wherein the positioning member includes a contact surface facing an inclined portion other than an effective region in the second optical surface of the lens.

17. The method for manufacturing an image pickup lens unit according to claim 1 , wherein the positioning member includes a contact surface which faces the second optical surface of the lens and has substantially the same shape as the second optical surface.

18. The method for manufacturing an image pickup lens unit according to claim 1 , wherein the lens is a single lens component, or a lens assembly which is an integrated combination of a plurality of lens elements.

19. The method for manufacturing an image pickup lens unit according to claim 1 ,
wherein the lens is a single lens component, or a lens assembly which is an integrated combination of a plurality of lens elements, and
the lens assembly is an integrated combination of a plurality lens elements and a stop interposed between the plurality of lens elements.

20. The method for manufacturing an image pickup lens unit according to claim 1 , wherein the lens has quadrilateral prism-like side surfaces.

21. The method for manufacturing an image pickup lens unit according to claim 1 , wherein a molding space for molding the lens is provided at a position different from the molding space for molding the holder member, in the mold.

22. The method for manufacturing an image pickup lens unit according to claim 1 , wherein the holder member and the lens are formed with a reflow heat-resistant material.

23. The method for manufacturing an image pickup lens unit according to claim 1 , wherein movement of the lens is prevented by sucking the lens from the mold side in a state of positioning the lens by the positioning member.

24. The method for manufacturing an image pickup lens unit according to claim 1 , wherein the lens is formed of a resin material.

25. The method for manufacturing an image pickup lens unit according to claim 4 , wherein the pressing of

Assignees

• Mori Hajime
• Fujii Takashi
• Miyazaki Takemi
• Konica Minolta Inc

Inventors

• Mori Hajime
• Fujii Takashi
• Miyazaki Takemi

Classifications

• G02B19/0076

  for use with a detector (G02B19/009, G02B19/0095 take precedence) · CPC title

• B29C2045/14122

  using fixed mould wall projections for centering the insert · CPC title

• B29C45/14065 Primary

  Positioning or centering articles in the mould · CPC title

• G02B7/02 Primary

  for lenses {(supports for magnifying lenses G02B25/002)} · CPC title