JPS58195811A - Lens barrel - Google Patents

Abstract

PURPOSE:To enable the adhering of a lens to a lens barrel without generation of distortion by providing a stepped part or a relief part for an adhesive agent on the outside circumferential surface of an optical element such as a photographic lens held in the lens barrel or the inside circumferential surface of the lens barrel. CONSTITUTION:A stepped part 2a is provided in a part on the inside circumferential surface of a lens barrel 2 which holds a work 1 to be held such as a photographic lens or a stepped part 1a is provided on the outside circumferential surface of the work 1. An adhesive 3 is coated on the stepped outside of the work 1 or the stepped core of the barrel 2 and the work 1 is inserted into the barrel 2 or the barrel 2 into the work 1; thereafter, the adhesive 3 is allowed to set. Then, the adhesive 3 oozes only into the stepped gap or slightly into the stepped part but does not ooze on the beveled part or the surface of the work 1 and the shrinkage of the lens surface occuring in the setting of the adhesive is obviated; therefore, the lens is held without any distortion.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an optical element such as an optical glass or a lens. This relates to a lens x*m that can be easily bonded and held without distortion.

Kenmei, the lens identification method in the lens m cylinder is m1FI.
A (&) ~ (as shown in the phrase, screw retainer, spring/V
-416
This method requires more than a certain amount of force to firmly attach the lens to the lens barrel so that it does not move, and this inevitably causes distortion in the lens and the appearance of quirks (asperity, cod). The 0-gluing method, which is worse than the lens alone N&, also causes problems with the axis method and There was a drawback.

Furthermore, lens barrels using conventional adhesive methods have the disadvantage that adhesive protruding from the adhesive portion cannot be wiped away.

The present invention eliminates the drawbacks of the above-mentioned conventional examples, and at the same time, since it does not generate any metal, a stronger adhesive can be used, and long-term stability is achieved by holding the glass or lens. To provide a lens barrel which makes wiping difficult and shortens working time because adhesive does not protrude.

m2 diagram (a), (cut is one embodiment of the present invention, code 1
is the work to be held (optical element) such as a photographic lens, 2 is a part of the lens barrel, and 6 is the adhesive that holds and fixes 1 and 2.
In Figure (1), a stepped 2at is provided on a part of the lens barrel 2,
In (b), the held sorter 1 is provided with a step 1a. FIG. 3 shows an example of the state when bonding is performed, and the holder that receives the sorter 1 and part 2 of the lens barrel is a member.

In the above configuration, the stepped outer diameter of the sorter 1 or the stepped inner diameter of the part 2 of the lens barrel Kl1 is applied with adhesive 3, and the sorter 1 is inserted into the lens barrel 2 or the lens barrel 2 is inserted into the workpiece 1. .

Or, insert the sorter 1 or the lens barrel 2, inject the edge adhesive 3 into the gap between the stepped parts of the sorter 1 and the lens barrel 2, and harden the adhesive together. Although it does not protrude or stick to the chamfered part or surface of the workpiece, it does not protrude or stick to the chamfered part or surface of the workpiece, and the lens surface can be held without distortion without shrinking due to hardening of the adhesive. .

In the above embodiment, the embossed shape is shown as a straight P4 step, but as shown in FIG. 4, it may be an angular shape 2b or a Fi111 ratio shape 2C. It is necessary to be (
As shown in Figure 5, there may be multiple stages 2...2f, and instead of just one side of the sorter or #i lens barrel, there may be steps on the inside. Furthermore, #! 6 Work or #i- as shown in Figure 6.
The shape may include a groove 5 inside a part of the end surface of the strip.

Up until now, we have explained 1iS2 using the lens shape as an example of the workpiece, but it is also similar when holding flat surfaces such as filter mirrors and prisms.

As explained above, the lens can be made without distortion while maintaining the accuracy of the lens itself, using a simple structure of providing a stepped part or a stub of Fi adhesive on the lens to be glued or the frame to be glued. It can be held adhesively.

A stronger adhesive can be used, resulting in better retention and stability. Since there is no need to wipe off the protruding wrinkled copper, the work time becomes longer.

[Brief explanation of the drawing]

Figure jl41 is a cutaway view of a conventional lens fixing method. 4 to 6 are cross-sectional views of the lens fixing and holding method of the present invention, and FIG. 3 is a cross-sectional view of an example of a state in which the lens is bonded. 1●●●●●Work, 2●●●●●Part of lens barrel, 3
●-・Fist・Adhesive, 4●・aha receiving S#, 5・・●
●＠Hole for injecting adhesive. Taganito Canon Inc. 15 (IQ) (b) (C)
(d) (α) (b
) Figure 5. α, (b)

Claims (3)

[Claims] (1) In a lens barrel that holds an optical element such as a photographic lens, the outer circumferential direction of the optical element or the inner JI of the lens barrel
A lens barrel characterized by having a stepped portion on the l11 surface. (2) The m-4th aspect of patent claim 4, characterized in that the connecting direction Fi #4 of the nine-stepped portion formed on the inner circumferential surface of the lens barrel and the inner circumferential surface of the lens barrel is a horizontal plane or a negative direction. The lens barrel according to item 9. (3) Claim No. 9 to Q. ) Lens barrel made of dust.