CN212433480U

CN212433480U - Zoom lens's equipment tool

Info

Publication number: CN212433480U
Application number: CN202021271591.3U
Authority: CN
Inventors: 林贤城; 李坤泓; 邵文霞
Original assignee: Xiamen Leading Optics Co Ltd
Current assignee: Xiamen Leading Optics Co Ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2021-01-29
Anticipated expiration: 2030-07-03

Abstract

The utility model discloses an equipment tool of zoom, including the tool body, the tool body has connecting portion and is used for locking the picture frame, and the tool body has first spacing face and picture frame step face cooperation and guarantees the tool body and radially parallel with the picture frame, and the tool body has spacing face of second and main section of thick bamboo step face cooperation and guarantees main section of thick bamboo and tool body radially parallel, and the tool body has first external diameter fitting surface and picture frame internal diameter cooperation and guarantees the axiality, and the tool body has second external diameter fitting surface and guarantees the axiality with main section of thick bamboo internal diameter cooperation. The utility model discloses a picture frame is ZOOM group or FOCUS group, and radial skew and axial tilt when eliminating ZOOM ZOOM group or FOCUS group equipment through the equipment tool to promote the assembly yield of camera lens.

Description

Zoom lens's equipment tool

Technical Field

The utility model discloses a zoom's equipment tool belongs to the supplementary tool of camera lens equipment and makes technical field according to international patent classification table (IPC) division.

Background

As shown in fig. 1, the conventional ZOOM lens includes a main barrel a1, a ZOOM (ZOOM) group and a FOCUS (FOCUS) group, and further cooperates with a ZOOM group adjusting ring a4 and a ZOOM group guide pin a5, the ZOOM group a2 and the FOCUS group A3 are movable groups, and when the movable group, i.e. the structure of the lens frame, is designed, there is a gap between the main barrel and the lens frame, as illustrated in fig. 1, the single-side gap between the main barrel and the corresponding lens frame is 0.05 mm.

Manually assembling the picture frame, enabling the lantern ring to be normally connected through a screw, rotating the adjusting ring to enable the ZOOM group to move to the bottom (TELE end), measuring the height of four points uniformly distributed on the bottom step of the picture frame of the ZOOM group by using a height meter, recording the numerical values of the other three points by taking the first point as a zero point, and taking the absolute value of the height difference as a parallelism numerical value; the excessive group parallelism results from the common effects of radial offset and axial skew, and the excessive group parallelism may cause the assembled two components (including the two lenses, the frame, the guide pin and the adjusting ring) to tilt relative to the optical axis of the lens, resulting in poor imaging.

The reason for the parallelism deviation of the group frame is analyzed as follows:

this schematic example is illustrated with the single-side gap between the main barrel a1 and the frame a6 being 0.05mm, as shown in fig. 2; the gap between the two sides is kept unchanged, so that the mirror frame can smoothly move in the main cylinder, the radial deviation and the axial skew can be kept stable, and after the guide nails are uniformly locked, the guide nails can drive the mirror frame to smoothly and stably move;

as shown in fig. 3, the assembling method is that the mirror frame is firstly assembled into the main cylinder to a certain position, the main cylinder is horizontally placed on the platform, the guide nails are uniformly locked, because the main cylinder and the mirror frame have a gap, when the main cylinder is horizontally placed on the platform, the mirror frame in the main cylinder is radially deflected under the action of gravity before the guide nails are locked, and the gap between the upper edges of the main cylinder A1 and the mirror frame A6 in fig. 3 is deflected to 0.1mm from 0.05 mm;

as shown in fig. 4, the outer diameters of the front and rear ends of the main cylinder are not consistent, so that the main cylinder cannot be kept completely horizontal, and the lens frame is already axially skewed in the main cylinder by an inclination angle of 0.6 ° under the influence of factors such as form and position tolerance (roundness and coaxiality) existing in the machining of the inner diameter of the main cylinder and the outer diameter of the lens frame.

When the lens frame is in a radial deviation position and an axial deflection position relative to the main barrel, the guide nail is locked, so that the parallelism of the group is overlarge, the parallelism of the group can cause the inclination of the components (including lenses in the group) compared with the optimal optical axis of the lens, the imaging is poor, the parallelism of the group cannot be accurately adjusted, the calibration can be carried out only by the assembly experience of operators, and the calibration process is standard-free, tedious and time-consuming.

Disclosure of Invention

The not enough to prior art, the utility model provides an equipment tool of camera lens eliminates radial skew and the axial tilt when ZOOM ZOOM group or FOCUS group equipment through the equipment tool to promote the assembly yield of camera lens.

In order to achieve the purpose, the utility model is realized by the following technical proposal:

the utility model provides an equipment tool of camera lens, includes the tool body, and the tool body has connecting portion and is used for locking the picture frame, and the tool body has the cooperation of first spacing face and picture frame step face and guarantees that the tool body is radially parallel with the picture frame, and the tool body has the cooperation of the spacing face of second and main section of thick bamboo step face and guarantees that main section of thick bamboo is radially parallel with the tool body, and the first spacing face and the spacing face of second of tool body are parallel.

Further, the tool body has first external diameter fitting surface and picture frame internal diameter cooperation and guarantees the axiality, and the tool body has second external diameter fitting surface and main section of thick bamboo internal diameter cooperation and guarantees the axiality, and the first external diameter fitting surface and the second external diameter fitting surface of tool body are coaxial setting.

Further, the connecting part of the jig body is a threaded part.

Furthermore, the frame is a movable group.

Further, the lens frame is a ZOOM group or FOCUS group.

Further, when the picture frame is ZOOM group, the screw thread portion of the matched jig body is located between the first limiting surface and the second limiting surface.

Furthermore, the first limiting surface of the jig body is arranged on the end surface of the jig body, and the first outer diameter matching surface is arranged on the circumferential side surface of the end part of the jig body.

The utility model discloses radial skew and axial slope when ZOOM ZOOM group, FOCUS group equipment have been eliminated to ZOOM's equipment tool, and axiality and depth of parallelism after more effectual assurance equipment prevent the group slope, and then have promoted the assembly yield of camera lens.

Drawings

Fig. 1 is a schematic diagram of a zoom lens according to the related art.

Fig. 2 is a schematic view of the assembly of the main barrel and the frame in the conventional assembly.

Fig. 3 is a schematic view of the theoretical radial offset of the prior art primary barrel and rim.

Fig. 4 is a schematic view of the theoretical radial offset of the prior art primary barrel and rim.

Fig. 5 is an assembly diagram of the jig of the present invention.

Fig. 6 is an assembly diagram of the embodiment of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

example (b): referring to fig. 5 and 6, an assembly jig for a lens includes a jig body 1, the jig body 1 has a connecting portion 11 for locking a lens frame 2, the jig body 1 has a first limiting surface 12 cooperating with a step surface of the lens frame to ensure that the jig body 1 is radially parallel to the lens frame, the jig body 1 has a second limiting surface 13 cooperating with a step surface of a main barrel to ensure that the main barrel 3 is radially parallel to the jig body 1, and the first limiting surface and the second limiting surface of the jig body 1 are parallel. The jig body 1 is provided with a first outer diameter matching surface 14 which is matched with the inner diameter of the mirror frame to ensure coaxiality, the jig body 1 is provided with a second outer diameter matching surface 15 which is matched with the inner diameter of the main barrel to ensure coaxiality, and the first outer diameter matching surface and the second outer diameter matching surface of the jig body 1 are coaxially arranged. The connecting portion of tool body 1 is screw thread portion, and the screw thread portion of tool body is located between first spacing face and the second spacing face. The first limiting surface of the jig body 1 is arranged on the end surface of the jig body, and the first outer diameter matching surface is arranged on the circumferential side surface of the end part of the jig body.

As shown in fig. 5, an assembly jig is added to an original manual assembly scheme to assist assembly, and the assembly jig ensures the coaxiality of the lens frame 2 and the main barrel 3 and the parallelism of the lens frame in the main barrel during assembly, so that the problem of group skew caused by clearance fit, machining tolerance of mechanical parts and assembly methods during original assembly is solved, and the unilateral clearance between the main barrel and the lens frame is 0.05mm in the embodiment. Under the condition that the size processing of each structural part meets the specification, the newly-added assembly jig can effectively restrain the inclination of each direction of the group by ensuring the coaxiality and the parallelism of the group mirror frames during assembly.

As shown in fig. 6, taking the ZOOM group assembling jig 101 as an example, the ZOOM group 121 is locked on the assembling jig through threads, the step surface of the lens frame is matched with the plane of the jig to ensure that the jig is radially parallel to the lens frame, and the inner diameter of the lens frame is matched with the outer diameter of the jig to ensure coaxiality; then the jig is assembled into the main barrel 3, the inner diameter of the main barrel and the outer diameter of the jig ensure coaxiality, the step surface of the main barrel is matched with the plane of the jig to ensure that the main barrel is radially parallel to the jig, and further the coaxiality of the main barrel 3 and the picture frame and the parallelism of the assembled picture frame are indirectly ensured, and the ZOOM lens in fig. 6 further comprises ZOOM group guide nails 4, ZOOM group adjusting rings 5, lens groups 6 and FOCUS group guide nails 7.

As shown in fig. 6, the FOCUS group assembling jig 102 has the same principle, and the design is performed by searching the screw joint, the plane matching surface, and the inner and outer diameter matching surfaces of the FOCUS group 122 and the assembling jig; the assembly jig 102 is designed and adjusted to have a U-shaped structure with one side higher than the other side, in which the functional bearing surface is required to be ensured by the assembly jig and the inner and outer diameter fitting surface of the main cylinder, the plane fitting surface, and the like.

Following with manual equipment ZOOM ZOOM group and pass through the utility model discloses the equipment is assisted to the tool, and the depth of parallelism numerical test of sample is compared:

table one is the parallelism value measured for the manual assembly of 5 samples of the ZOOM group frame:

protocol \ sample number	1	2	3	4	5
						Scheme one	0.014	0.026	0.048	0.084	0.046

Table two is for using the utility model discloses the depth of parallelism numerical value that 5 samples of ZOOM crowd picture frame were measured in the equipment of assemblage tool:

protocol \ sample number	1	2	3	4	5
						Scheme one	0.006	0.008	0.009	0.014	0.015

In the first and second tables, after the ZOOM group is assembled with the main cylinder, the ZOOM group is driven to the bottom (TELE end) by rotating the adjusting ring, the height of four points uniformly distributed on the bottom step of the picture frame of the ZOOM group is measured by using the height meter, the numerical value of the other three points is recorded by taking the first point as a zero point, and the absolute value of the height difference is taken as the parallelism numerical value.

The first table and the second table are compared, ZOOM group lens frame sample data assembled by the assembling jig are obviously smaller than manual assembling lens frame sample data, parallelism is obviously improved, and the assembling jig is used for assembling the lens frame to obviously control the anti-deflection effect of the movable group of the ZOOM lens during assembling.

The above description is only an embodiment utilizing the technical content of the present disclosure, and any modification and variation made by those skilled in the art can be covered by the claims of the present disclosure, and not limited to the embodiments disclosed.

Claims

1. The utility model provides an equipment tool of camera lens which characterized in that: including the tool body, the tool body has connecting portion and is used for locking the picture frame, and the tool body has first spacing face and picture frame step face cooperation and guarantees that the tool body is radially parallel with the picture frame, and the tool body has the spacing face of second and main section of thick bamboo step face cooperation and guarantees that main section of thick bamboo is radially parallel with the tool body, and the first spacing face and the spacing face of second of tool body are parallel.

2. The lens assembly jig of claim 1, wherein: the jig body has first external diameter fitting surface and picture frame internal diameter cooperation and guarantees the axiality, and the jig body has second external diameter fitting surface and main section of thick bamboo internal diameter cooperation and guarantees the axiality, and the first external diameter fitting surface and the second external diameter fitting surface of jig body are coaxial setting.

3. The lens assembly jig according to claim 1 or 2, wherein: the connecting part of the jig body is a threaded part.

4. The lens assembly jig according to claim 1 or 2, wherein: the frame is a movable group.

5. The lens assembly jig of claim 4, wherein: the frame is a ZOOM group or a FOCUS group.

6. The lens assembly jig of claim 5, wherein: when the picture frame is ZOOM group, the screw thread portion of the matched jig body is located between the first limiting surface and the second limiting surface.

7. The lens assembly jig of claim 6, wherein: the first limiting surface of the jig body is arranged on the end surface of the jig body, and the first outer diameter matching surface is arranged on the circumferential side surface of the end part of the jig body.