CN1302296C

CN1302296C - Lenses for aligning onto image acquisition lens accurately

Info

Publication number: CN1302296C
Application number: CNB2005100535924A
Authority: CN
Inventors: 陈文钦
Original assignee: JINZHAN OPTICS SCIENCE TECHNOLOGY Co Ltd
Current assignee: JINZHAN OPTICS SCIENCE TECHNOLOGY Co Ltd; Exquisite Optical Tech Co Ltd
Priority date: 2005-03-10
Filing date: 2005-03-10
Publication date: 2007-02-28
Anticipated expiration: 2025-03-10
Also published as: CN1664625A

Abstract

The present invention relates to a lens which can accurately aim at an image acquisition lens and is manufactured in an injection molding way. The present invention has a body, the periphery of which presents a pyramidal shape so as to form pattern draft. The periphery of the body is convexly provided with more than three positioning blocks. The outer edges of the positioning blocks extend in parallel along the axial direction of the body. The outer edges of the positioning blocks, which are furthest away from the axle center of the body are positioned on the same circumference which takes the axle center of the body as a center of a circle so that the outer edges of the positioning blocks, which are parallel to the axial direction of the body are abutted with the inner edge of a lens barrel. Thus, the body and the lens barrel are coaxially arranged so that the lens can accurately aim at an image acquisition lens.

Description

Can be precisely to being positioned at the eyeglass of image acquisition lens

Technical field

The present invention relates to a kind of most locating pieces of evagination that utilize and be resisted against the lens barrel inner edge, thereby can belong to injection moulding eyeglass technical field accurately to being positioned at the eyeglass of image acquisition lens.

Background technology

Fig. 7 with Figure 8 shows that existing lens structure, it is to make a rounded eyeglass 8 in the mode of injection mo(u)lding, the periphery 81 of this eyeglass 8 is designed to taper, to form pattern draft θ, periphery 81 at this eyeglass 8 is provided with a rescinded angle 82, these rescinded angle 82 places are provided with a feeding part 83, so that supply the usefulness of material injection when injection mo(u)lding.

It is a kind of design of necessity to form pattern draft θ that the periphery 81 of this eyeglass 8 is designed to taper, otherwise after eyeglass is injection molding moulding, will have to be difficult to move back mould or because to force the problem of moving back mould and damaging eyeglass.But because periphery 81 is designed to taper, therefore when eyeglass 8 was assembled into lens barrel 9, periphery 81 only had contacting of wire with lens barrel 9 inner edges 91, causes the phenomenon of eyeglass 8 deflections easily, as shown in Figure 9.Thus, the axis A of eyeglass 8 just can deflection and can't aim at the sensing region center line A of image sensing component 92, and this will cause image to lose problems such as Jiao.

At eyeglass 8 peripheries 81 rescinded angle 82 being set is to protrude from outside the periphery 81 formed circumference after feeding part 83 (being commonly called as base of a fruit head) is sheared, thereby influences the assembly working of eyeglass.In other words, rescinded angle 82 is yielding designs of a kind of necessity.But the die cavity 71 (as shown in figure 10) that the design of rescinded angle 82 can cause the injection moulding eyeglass to be used becomes non-circular form, thereby need be gone out the shape of die cavity 71 by computer program emulation, drives cutter 6 again and processes in mould 7 and finish die cavity 71.But via the circular arc machining path of computer program emulation, its out of roundness is difficult for guaranteeing, may cause produced eyeglass 8 accurate problem of contraposition when assembling.

Therefore, above-mentioned lens structure truly has improved necessity in addition.

Summary of the invention

Fundamental purpose of the present invention be for solve the above problems provide a kind of can be precisely to being positioned at the eyeglass of image acquisition lens.

For realizing above-mentioned goal of the invention, the present invention adopts following technical scheme:

A kind of can it is characterized in that precisely to being positioned at the eyeglass of image acquisition lens:

Described eyeglass is made in the mould molding mode, it has a body, this body has an end face and a bottom surface, it between this top, the bottom surface periphery, this periphery is the form of taper, and this periphery convexes with the locating piece more than three, and the outer rim of each locating piece and the axially parallel of this body extend, and the outer rim of each locating piece is on the same circumference in the center of circle apart from the axle center that the farthest, axle center of this body is positioned at this body.

The invention has the advantages that: can allow eyeglass realize contraposition with image acquisition lens accurately.

Description of drawings

Fig. 1 is the side view of eyeglass of the present invention;

Fig. 2 is the vertical view of eyeglass of the present invention;

Fig. 3 is the processing synoptic diagram that is used for making the mould of eyeglass of the present invention;

One of synoptic diagram when Fig. 4 is eyeglass of the present invention assembling;

Two of synoptic diagram when Fig. 5 is eyeglass of the present invention assembling;

Fig. 6 is the structural representation of second embodiment of the invention;

Fig. 7 is the side view of existing eyeglass;

Fig. 8 is the vertical view of existing eyeglass;

Synoptic diagram when Fig. 9 is the assembling of existing eyeglass;

Figure 10 is the processing synoptic diagram of the mould of existing eyeglass.

Embodiment

See also Fig. 1 and Fig. 2, present embodiment is can be precisely to being positioned at the eyeglass of image acquisition lens, this eyeglass is injection mo(u)lding, it has a body 1, this body 1 has an end face 11 and a bottom surface 12, and should push up, bottom surface 11, be defined as a periphery 13 between 12, this periphery 13 is taper to form pattern draft θ, and the periphery 13 of this body 1 convexes with the locating piece 14 more than three, be that example describes so that the locating piece that four transversal section are circular arc to be set in the present embodiment, the outer rim 141 of each locating piece 14 is parallel with the axial A of this body 1, and the outer rim 141 of each locating piece 14 is on the same circumference in the center of circle apart from the axle center that the farthest, axle center of this body 1 is positioned at this body 1, the periphery 13 of this body 1 has a rescinded angle 15 in addition, and is provided with a feeding part 151 at these rescinded angle 15 places, so that supply the usefulness of plastics injection when injection mo(u)lding.

See also Fig. 3, because each locating piece 14 of the present invention protrudes from the periphery 13 of body 1, therefore mould 2 can calculate the machining path of straight line by computer program accurately and drives cutter 22 and process locating piece 14 pairing die cavitys 21 accurately adding man-hour, and the outer rim 141 that makes each locating piece 14 after the injection mo(u)lding is parallel to the axial of body 1, thus, the part of the die cavity 21 corresponding body 1 peripheries 13 out of roundness problem after the processing that just do not need to worry, thus manufacturing cost can be reduced.

Because the outer rim 141 of each locating piece 14 is parallel to the axial A of body 1, and the outer rim 141 of each locating piece 14 is on the same circumference in the center of circle apart from the axle center that a bit is positioned at this body 1 of the farthest, axle center of this body 1, therefore when being assembled in eyeglass body 1 in the lens barrel 3, just can be resisted against the inner edge 31 of lens barrel 3 with the outer rim 141 of each locating piece 14, as Fig. 4 and shown in Figure 5, thereby can guarantee this body 1 and lens barrel 3 coaxial settings, make the sensing region center of the axes alignment of body 1, reach and make eyeglass precisely to being positioned at the effect of image acquisition lens in image sensing component 4.

Certainly, still there are many examples in the utility model, therebetween the only variation on the details.See also Fig. 6, it is second embodiment of the present utility model, is at the periphery 13A of body 1A three locating piece 14A to be set, and the transversal section of the outer rim of each locating piece 14A is polygon, so also can reach the identical effect with aforementioned first embodiment.

The mould of this eyeglass is except aforesaid injection forming mold, can further use perfusion mould, pressurizing mould according to lens structure characteristic of the present invention makes, therefore, the selection of lens materials can be more extensive, can comprise materials such as plastics, high molecular polymer or glass.

Claims

One kind can be precisely to being positioned at the eyeglass of image acquisition lens, described eyeglass is made in the mould molding mode, it has a body, this body has an end face and a bottom surface, is a periphery between this top, the bottom surface, this periphery is the form of taper, it is characterized in that:

Described periphery convexes with the locating piece more than three, and the outer rim of each locating piece and the axially parallel of this body extend, and the outer rim of each locating piece is on the same circumference in the center of circle apart from the axle center that the farthest, axle center of this body is positioned at this body.
2. as claimed in claim 1 can it is characterized in that precisely to being positioned at the eyeglass of image acquisition lens:

The outer rim transversal section of each locating piece is circular-arc.
3. as claimed in claim 1 can it is characterized in that precisely to being positioned at the eyeglass of image acquisition lens:

The outer rim transversal section of each locating piece is polygon.
4. as claimed in claim 1 can it is characterized in that precisely to being positioned at the eyeglass of image acquisition lens:

This formed in mould eyeglass is formed by perfusion mould, injection forming mold, pressurizing mould manufacturing.
5. as claimed in claim 1 can it is characterized in that precisely to being positioned at the eyeglass of image acquisition lens:

The periphery of this body has a rescinded angle, is provided with a feeding part that supplies plastics to inject when being used in injection mo(u)lding at this rescinded angle place.
6. as claimed in claim 1 can it is characterized in that precisely to being positioned at the eyeglass of image acquisition lens:

The material of this eyeglass is plastics, high molecular polymer or glass.