JPS5928108A - Lens holding device - Google Patents

Abstract

PURPOSE:To hold the capacity of a lens and to form a lens system having a high temperature resistance, by providing a lens deformation absorbing part in a lens fitting part of a lens housing in a lens holding device where the lens stored in the lens housing is fixed by a pressing ring and providing an elastic part between the lens deformation absorbing part and the pressing ring to fix the plastic lens into the lens housing so that the shape of the lens is not changed by the variation of temperature. CONSTITUTION:A self-deformation absorbing lens 40 is formed with a synthetic resin, and a thin deformation absorbing part 42 whose section is V-shaped is provided along the outside circumferential edge of a plastic lens body 41, and the lens 40 is dropped to a lens setting part 31 while fitting it to a lens housing fitting part 43, and a pressing ring 34 is threadably attached to a screw part 33 through an elastic material 35 to fix the lens 40. When the temperature of the plastic lens body 41 is varied, the thermal stress in the radial direction due to the thermal expansion of the body 41 is absorbed by the elastic deformation of the deformation absorbing part 42. The elastic material 35 absorbs the thermal stress generated in the thrust direction, and thus, the change of the radius of curvature of the plastic lens is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lens holding device for holding a lens within a lens frame, and in particular, for fixing a plastic lens with weak temperature resistance within the lens frame so that its shape does not change even when the temperature changes. The purpose of this invention is to provide a lens system that maintains its lens performance and has strong temperature resistance, and to expand the operating temperature range of plastic lenses and other lenses that do not have temperature resistance.

Now, FIG. 1a describes the prior art.

When fixing the plastic lens 7 into the frame 2 using the conventional technique, the lens 7 is first placed against the lens frame body attachment part 4 through the lens frame fitting part 5. Next, it is realized that it is fixed to the screw portion 3 of the lens frame.

Now, when the lens 7 and the lens frame 2 assembled at room temperature are brought to a high temperature state, as shown in FIG. The part where the coefficient of linear expansion is affected is the lens holding ring contact part 8 shown in Figure 1. This part already has zero clearance when assembled at room temperature, so the lens will not hold at high temperatures. The difference in the coefficient of linear expansion between the holding ring 7 and the holding ring 1 directly affects the surface shape. (The surface of the lens 7 is depressed by the lens holding ring 1 at the lens holding ring contact portion 8, and the lens is regulated to a state of clearance zep by the inner diameter of the holding ring 1.) In other words, as the temperature increases, , the lens begins to expand in the radial direction.

However, for the reasons mentioned above, this radial deformation is restricted and thermal stress is generated inside the lens. Therefore,
In the next step, the lens begins to deform in an unregulated direction along the optical axis in an attempt to relieve this thermal stress. Therefore, when considering the cross section in the axial direction including the optical axis of the lens 7 (see the 1100th explanatory diagram), since the length of the string AB is regulated by the presser ring 1, the arc becomes narrower.

Letting the rate be α, ■1. C A B=A B・(1+αt) It can be approximated by

Next, when the lens 7 and the lens frame 2 assembled at room temperature are brought to a low temperature as shown in FIG. Since the coefficient of linear expansion is larger than that of the material from which the ring 1 is made, the lens 7 tends to contract more than the lens frame 2 and the presser ring 1 as the temperature decreases.

However, as mentioned above in the high-temperature state, the outer periphery of the lens 7 is held at the lens presser ring contact portion 8 by the presser yJl.
Therefore, the lens 7 cannot be contracted more than the contraction of the presser ring 1. Therefore, thermal stress will occur inside the lens 7.

In the next step, the lens 7 begins to deform in the direction of the optical axis, which is not subject to any restrictions, in order to eliminate this thermal stress. Therefore, considering the cross section in the axial direction including the optical axis of the lens 7 (see the explanatory diagram in Figure 1 d), if the length of the chord AB is the holding ring 1 and the coefficient of linear expansion is α, then the awn approximation can be made. .

For the above reasons, when a plastic lens is fixed in the lens frame 2 using the conventional technology, the radius of curvature changes due to temperature changes (it becomes smaller at high temperatures and becomes larger at low temperatures).
At room temperature, the focus position shifted significantly and various aberrations worsened.

Moreover, as shown in FIG. 1e, J1! There is also a method of arranging 4 frictional resistances to obtain a composite lens that does not cause the centers of the lenses 21 and 22 to shift (for example, the idea disclosed in Japanese Utility Model Application Publication No. 55-138606). .22, it does not prevent the outer diameter of the lens from being restricted by the presser ring 25 or the inner diameter of the lens holding member, and after all, this method does not prevent the plastic lens from being placed inside the lens holding member 23. Even if it is fixed to , it is not possible to prevent the radius of curvature of the plastic lens from changing due to temperature changes, which may lead to the shift in focus position or worsening of aberrations due to temperature as described above.

There is also a "lens barrel" described in Utility Model Application Publication No. 49-11740, which has a lens surface made of an elastic material.
It consists of a structure in which it is pressed through a ring, and is a device based on a technical concept different from the purpose of the present application.

On the other hand, the following is a consideration of the conventional technology regarding the optical element fixing member.

1 "Lens holding device" disclosed in Japanese Utility Model Publication No. 53-40254 (1) The engaging protrusion of the pressure contact member must have contradictory properties of elasticity and rigidity to satisfy the lens performance. It is difficult to select the material and set the strength in order to assemble the lens smoothly with the pressing force required.

(2) Due to the nature (described above) of the engaging protrusions of the press-contact portion, it is difficult to provide a large number of protrusions. Therefore, since the lens must be constructed with a small number of protrusions, the force that presses the lens becomes partially non-uniform, and sufficient guarantees cannot be made for the surface shape of the lens and the eccentricity and inclination of the optical axis of the lens.

(3) When the press-contact member is made of plastic, even if the function can be satisfied at room temperature, there is a high risk that it will loosen due to stress relaxation due to temperature changes.

(4) When the number of engaging protrusions on the pressure contact member is increased, the number of grooves that fit into each protrusion increases.

(5) When an elastic body is used, a difference is likely to occur in the pressing force of the lens between the part with the engaging protrusion and the part without it, making it difficult to set the pressing force.

(6) Assuming that a plastic lens is used for the lens, due to the low mechanical strength of the lens material, it will be easily affected by the pressing force of the pressing member, and this, combined with the uneven pressing force, will cause the plastic lens to be fixed. It is not suitable for

(7) From the above, it cannot be used as an appropriate lens holding device for lens systems that require high performance, including plastic lenses, and/or when the environment in which they are used changes significantly.

2. Other conventional techniques (1) Crimping method The claw 2 provided on the lens frame 26 is
By tilting the lens 28, the lens 28 is fixed to the lens frame 26 by V・1, but if the lens 28 is a plastic lens, the lens 28 will be deformed by the heat generated by caulking and the caulking mechanism 9, and its surface shape cannot be maintained. There may also be cases where the parts are damaged.

Therefore, the present invention proposes a lens holding device that can solve the above-mentioned drawbacks of the conventional lens holding device and meet the above-mentioned needs. Examples will be specifically described.

FIG. 2 shows a first embodiment of the present invention, in which 30 is a delivery frame, 31 is a lens barrel attachment part provided inside the lens frame 3o, 32 is a lens fitting part, and the lens barrel attachment part 31 and lens fitting part 3
In addition to the embodiment in which the lens barrel 2 is provided annularly in the inner circumferential direction of the inner wall of the lens frame 30, it is also possible to implement it by constructing a plurality of partially annular lens barrel attachment pieces and lens fitting pieces (not shown). be.

33 is a threaded portion of a retaining ring 34 provided on the inner wall of the lens frame 30.

Further, an elastic body 35 constituting an elastic portion is fixed to the holding ring 34 on the side of the contact surface with a self-deforming absorbing lens 40, which will be described later.

In the illustrated embodiment, the structure is constructed by lining an elastic member such as rubber.

Further, the material of the retaining ring 34 is not limited to metal material like the lens frame 30, but if the lens frame 30 is made of synthetic resin, it may be made of synthetic resin as well; a specific example thereof is as follows. In this case, the presser foot 34 is formed of a synthetic resin material containing carbon fiber or the like having a high elastic modulus, and the elastic body 35 is formed of an ABS resin or the like having a low elastic modulus, and both are double molded or inserted. It is constructed by integrating it using a molding method.

Next, the self-deforming absorption lens 40 is formed of synthetic resin, and a cross section with a thickness thinner than the minimum thickness of the lens body 41 along the outer periphery of the plastic lens body 41 has a V shape.
A letter-shaped deformation absorbing portion 42 is provided, and a lens frame fitting portion 43 having an inverted trapezoidal cross section is provided on the outer periphery of the deformation absorbing portion 42.

Now, the self-deforming absorption lens 40 is assembled into the lens frame 30.
After fitting the lens frame fitting part 43 on the outer periphery of the plastic lens into the lens fitting part 32 and dropping it down to the lens body part 31, the plastic lens is screwed onto the screw part 33 with the presser foot 34. A deformation absorbing part 42 provided in the self-deformation absorbing lens 40 itself is interposed between the main body 41 and the lens fitting part 32, and an elastic body 35 is interposed between the plastic lens main body 41 and the holding ring 34, and the self-deformation absorption is lens 4
0 can be fixed within the lens frame 30.

Plastic lens body 4 held in such a configuration
When a temperature change is applied to 1, the plastic lens body 41
expands and contracts with repeated changes in cold and heat, and thermal stress generated in the radial direction at high temperatures can be absorbed by elastic deformation of the deformation absorbing portion 42, and the lens body portion 31 of the lens frame 30 Thermal stress in the thrust direction can be absorbed by the elastic deformation of the elastic body 35 of the presser ring 34, and the elastic deformation action of the elastic body 35 promotes the elastic deformation effect of the deformation absorbing portion 42.

Therefore, in the lens holding device according to the first embodiment of the lens holding device of the present invention, when storing the plastic lens body 41 in the lens frame 30, the plastic lens body 41 has a A deformation absorbing portion 42 formed with a thickness thinner than the minimum wall thickness is provided, and a self-deforming absorbing lens 40 is attached to a presser ring 34 that presses and fixes the self-deforming absorbing lens 40 into the lens fitting portion 32 of the lens frame 30. Since the structure is constructed by providing the elastic body 35 at the contact portion, the following effects can be obtained.

First, when a cold-heat change occurs in the plastic lens body 41, thermal stress is generated in the radial direction due to thermal expansion of the plastic lens body 41, but the thermal stress is absorbed by the elastic deformation of the deformation absorbing section 42 provided in the plastic lens body 41. , it is possible to prevent changes in the radius of curvature of the lens. Therefore, there is no need to particularly increase the fitting clearance between the plastic lens body 41 and the lens frame 30, and the conventional settings can be made, so that the lens performance can be maintained at the same level as before.

Furthermore, since the presser ring 34 has an elastic body 35 disposed in the lens pressing portion, it can also follow expansion and contraction in the thrust direction due to temperature changes in the presser contact portion of the plastic lens body 41. In the case of expansion, it can absorb the thermal stress generated in the thrust direction and help prevent changes in the curvature of the plastic lens. In addition, since the elastic body 35 acts in a direction that offsets the stress relaxation caused by the clamping of the plastic lens body 41 by the presser ring 34, the presser ring 34
The loosening phenomenon described in No. 4 can be prevented, and the lens can be held for a long time without wobbling. It is possible to expand the range of environments in which plastic lenses can be used.

Next, in the second embodiment shown in the third figure, the lens frame 30, the presser ring 34
The structure of the elastic body 35 is the same as that in the first embodiment, but the structure of the self-deforming absorption lens 40 housed therein is different.

That is, the self-deforming absorption lens 40 has an annular foamed portion 44 made of a foamed layer on the outer periphery of a plastic lens body 41.
By providing the deformation absorbing portion 42 in the first embodiment,
It is composed of

As will be described later, the function and effect of the deformation absorbing part 42 can be achieved only by providing the foamed part 44, but in the case of the illustrated embodiment, an annular lens frame fitting part is provided on the outer periphery of the foamed part 44. 45 is provided.

Furthermore, the plastic lens body 41 and the foamed part 44, and the foamed part 44 and the lens frame fitting part 45, are respectively provided at the lens anchor 46 provided on the outer periphery of the plastic lens body 41 and the inner periphery of the lens frame fitting part 45. Fitting part anchor 47
The foamed portion 44 is connected to the plastic lens body 4.
1 and the lens frame fitting part 45 by foam molding.

Furthermore, a skin layer 4B is provided on the outer skin of the foamed part 44, but this is not necessarily formed during the molding process of the foamed part 44, but it may also be actively formed or, conversely, it may be formed. Kotona〈Implement 2. Note that the foamed portion 44 of the illustrated self-deforming absorption lens 40 is shown only in the case where it is provided in an annular shape along the outer periphery of the lens body.
It is also possible to implement this using Wi (a plurality of foamed pieces in the shape of a division (not shown)), and the elastic deformation effect of the foamed portion 44 can be further improved.

The self-deforming absorption lens 40 having the above configuration is housed in the lens frame 30 as in the first embodiment! ! (2) By holding, the lens holding device of the present invention can be constructed. In particular, according to this embodiment, a self-deformation absorbing lens 40 is provided with a deformation absorbing portion consisting of a foamed portion 44 provided on the outer periphery of a plastic lens body 41. is press-fixed into the lens frame 30 by a retaining ring 34 provided with an elastic body 35, and exhibits the following effects.

First, when a cold-heat change occurs in the plastic lens body 41, the thermal stress in the radial direction caused by the thermal expansion is absorbed by the elastic deformation of the foamed part 440, and the thermal stress in the thrust direction of the lens fixing part is absorbed by the presser ring 34°. This can be absorbed by the disposed elastic body 35, and even if temperature changes are applied to the plastic lens, changes in the curvature of the lens can be prevented.

In addition, the fitting clearance between the plastic lens body 41 and the a-frame 30 can be set to zero or a value close to it due to the elasticity of the foamed part 44 arranged on the outer periphery of the plastic lens body 41, so that the clearance between the plastic lens body 41 and the a-frame 30 can be set to zero or a value close to it. Misalignment and shift can be reduced, and lens performance can therefore be improved.

Furthermore, even when used for a long time, the elasticity of the foamed part 44 arranged around the outer periphery of the plastic lens body 41 and the elasticity of the elastic body 35 arranged in the presser ring 34 cause stress relaxation of the Plus Deck lens fixing part. Since these are canceled out, it is possible to prevent the loosening of the presser ring 34 and also to prevent the occurrence of play in the lens.

The third embodiment shown in FIG.
The structure of the lens deformation absorbing section provided in the plastic lens 40allJj is different from that of the above embodiment.

That is, in the case of Embodiment 1.2, the accommodating part 42 was provided in the lens deformation u' on the plastic lens itself to be stored, but in this embodiment, the accommodating part 42 was provided in the inner periphery of the lens fitting part 32 of the lens frame 30. It is something that

As shown in FIG. 4, a deformation absorbing portion 50 is constructed by protruding three thin plate-shaped enlarged pieces 50& on the inner periphery of the lens fitting portion 32.

Note that this deformation absorbing portion 50 can also be implemented by providing a protruding annular piece instead of the partial annular piece 50a.

Further, the lens fitting portion 3 is formed by the inner circumference of each partial annular piece 50a.
2, and a plastic lens 40 to be stored.
The inner diameter corresponds to the outer diameter of a.

The case where the lens body member 31 is also constructed by protruding three partial annular pieces 31 & from the inner periphery of the lens frame 30 is shown.

Therefore, the plastic lens 40a is inserted into the lens fitting portion 32.
After fitting between each partial annular piece 50a inside and dropping it down to the lens body part 31, it is pressed and fixed with a presser ring 34 with an elastic body 35 interposed therebetween, and the plastic lens 40& is placed inside the lens frame 30. By fixing it, a lens holding device can be constructed, and with the deformation absorbing portion 50 and the elastic body 35 of the presser ring 34, the same effects as in the first embodiment can be obtained.

In the fourth embodiment shown in FIG. 5, the lens deformation absorbing portion in each of the above embodiments is constituted by an annular deformation absorbing sleeve 51 formed separately from the lens frame 30 and the plastic lens 40 & that is housed therein. Lens fitting part 32 of lens frame 30
The plastic lens 40a is interposed between the plastic lens 40a and the outer periphery of the plastic lens 40a, and is fixed by a presser ring 34.

That is, as shown in FIG. 5a, the plastic lens 4
After fitting the deformation absorbing sleeve 51 around the outer periphery of the lens frame 30, it is stored in the sleeve fitting part 32& provided in place of the lens fitting part of the lens frame 30, and after being dropped to the lens body part 31, By the presser ring 34 with the elastic body 35 interposed,
A lens holding device is constructed by fixing the plastic lens 40a within the lens frame 30.

The deformation absorbing sleeve 51 is made of a synthetic resin with a low modulus of elasticity, such as ABS resin, and has a thin wall, and has a lens fitting part 51a on the inner periphery and a sleeve fitting part 32 on the outer periphery.
a and a lens frame fitting part 51b, and are integrally molded, and the outer and inner diameters of each part s1a and s1b are formed to correspond to the inner diameter of the sleeve fitting part 321L and the outer diameter of the plastic lens 40&. be.

According to the lens holding device of this embodiment, the deformation absorbing sleeve 51 interposed between the lens frame 30 and the plastic lens 401 provides the same effect as the deformation absorbing section 42 of the other embodiments. In particular, the wrinkled absorbing sleeve 51 is attached to the lens frame 30 and the plastic lens 40a.
It has the advantage that the elastic modulus of the material can be selected without being restricted by the materials of the two, making it easy to design to prevent changes in lens curvature due to temperature changes.

In the fifth embodiment shown in FIG. 6, a plurality of deformation absorbing parts 52 are provided inside the lens frame 30 in parallel with the optical axis of the lens and intermittently protrude in the inner circumferential direction of the lens frame 30. The difference is that the lens deformation absorbing section is configured by using the lens deformation absorption section (see Figure O).

The end portion 52a of each hairstyle absorption beam 52 is provided with a lens l11-material portion 53 and a lens fitting portion 54, and the outer peripheral edge of the plastic lens 40& held therein is provided with a lens light at a position corresponding to each deformation absorption portion 52. A fitting groove 60 is provided in a direction parallel to the axis.

Although not shown, an annular deformation absorbing portion is provided and the outer peripheral edge of the plastic lens 40& is
It is also possible to implement this by providing a matching groove.

Therefore, each deformation absorbing portion 5 of the lens frame 30 having the above structure
2 into each fitting groove 60 of the plastic lens 40a, the plastic lens 40a is housed in the lens frame 30, and the presser ring 34 is screwed onto the threaded portion 33, with the elastic body 35 provided therebetween. By suppressing and fixing the plastic lens 40&, a lens holding device can be constructed.

Therefore, under such a configuration, the plastic lens 4
When a temperature change is applied to the beam 9a, a thermal stress is generated in the radial direction due to the change in temperature, but this is caused by each deformation absorbing beam 5.
In particular, the operating direction due to the bending action of each deformation absorbing beam 52 is only the radial direction, and the direction is always constant.
A more stable desired effect can be achieved.

Other functions and effects are the same as in the first embodiment described above.

Now, in the case of the sixth to eighth embodiments shown in the seventh to ninth figures, the structure of the lens deformation 1 collecting part in each of the above-mentioned embodiments is changed between the plastic lens 40 & and the lens body part 31 of the lens frame 30. By reducing the coefficient of friction on the contact structure, the plastic lens 40 is configured to freely expand and contract in the radial direction due to temperature changes, thereby preventing changes in the radius of curvature of the lens while preventing thermal stress. Further, the structure of the presser ring 34 is the same, and the effect of absorbing thermal stress in the thrust direction is the same as in each of the embodiments described above.

The sixth embodiment shown in FIG. 7 is a lens fitting part 32 of a lens frame 30
When storing the plastic lens 40a inside, an annular friction damping member 55 is interposed between the plastic lens 40a and the lens body portion 31, and the elastic body 35 is used to suppress the plastic lens 40a by a presser ring 34 screwed onto the threaded portion 33. It is constructed by being fixed.

The friction damping member 55 is made of, for example, Teflon-based synthetic resin, and has a holding piece 61.561b protruding from the lens barrel portion 31 of the lens frame 30 on the annular inner periphery in a direction parallel to the lens optical axis. Seven flange 55a for engagement is provided protrudingly. 62 is a space between both holding pieces 61a%6Ib.

In the seventh embodiment shown in FIG. 8, when a plurality of body material protrusions 63 are protruded from the lens HLul material portion 31 of the lens frame 30 as shown in FIG. 8, the eighth embodiment shown in FIG. Curling protrusion 63
Instead, on the back of the outer peripheral edge of the plastic lens 40&,
As shown in FIG. 9, it is constructed by protruding a plurality of lens protrusions 64.

After storing the plastic lens 4Oa in the lens fitting part 32 of the lens frame 30 and dropping it down to the lens body part 31, the plastic lens 4Oa is screwed onto the threaded part 33 by screwing the presser ring 34 into the threaded part 33. 40. and lens body part 31
A body material protrusion 63 or a lens protrusion 64 is interposed between the plastic lens 40tL and the presser ring 34.
plastic lens 4 with an elastic body 35 interposed therebetween.
0a can be fixed within the lens frame 30.

According to the lens holding devices of both embodiments, the plastic lens 40 expands and contracts in the radial direction due to temperature changes.
Since the coefficient of friction in the lens barrel can be reduced by the barrel protrusions 63 or the lens protrusions 64, the lens can expand and contract freely, so no thermal stress is generated and changes in the radius of curvature are prevented.

In particular, in the case of both embodiments, since they are constituted by a frictional resistance reducing means interposed between the plastic lens, which is the lens deformation absorbing section in the other embodiments described above, and the lens film attached section, the space taken up in the construction is avoided. As a lens frame, it has the advantage of being compact in both radial and thrust directions. Other effects are the same as in the other examples of buckets.

[Brief explanation of the drawing]

Figures 1a to 1e are for explaining a conventional lens holding device, in which handle 1a is a sectional view, Figure 1 is an enlarged view of the same part,
Fig. 1 cXd is an explanatory diagram showing thermal stress of the lens due to temperature change, Fig. 1 e is a sectional view showing a lens holding device different from Fig. 11\la, and Figs. 2 to 9 are lenses of the present invention. Embodiments of the holding device are shown. FIG. 2 is a side sectional view showing the first embodiment, FIG. 3 a is a side sectional view showing the second embodiment, and FIG. Partial front view of self-deforming series lens,
Figures 4a and 4b are a 1 m cutaway view and a front view showing the third embodiment,
Fig. 5a is a side sectional view showing the fourth embodiment, Fig. 5 is a front view of the deformation absorbing sleeve, Fig. 6a is a side sectional view showing the fifth embodiment, and Fig. 6 is a main part. The enlarged view, FIG. 6O is a partial front view of the deformation absorbing part, and FIG. 7a is a side sectional view showing the sixth embodiment. Cross-sectional diagram, 8 diagrams &
8 is a partial front view of the lens seat part; FIG. 9a is a side sectional view showing the eighth embodiment;
FIG. 9 is a rear view of the plastic lens. 30... Lens frame 31.53... Lens waist part 32.54... Lens lower joint part 33... Threaded part 34... Holding ring 35... Elastic body 40... Φ self-deformation Absorption lens 40IL...Plastic lens 41...Plastic lens body 42.50...Deformation absorption part 43.45...Mirror frame fitting part 44...Foaming part 46...Lens anchor 47 Fist・Fitting part anchor 48...Skin layer 50s1...Partial annular piece 51...Deformation absorbing sleeve 52・Φ・Deformation absorbing portion 55...Friction damping member 60...Fitting groove 61a% 61b・・・Holding piece 62 ・・Spacing part 63 ・Subphase projection 64 ・・Lens projection Patent applicant Olympus Optical Industry Co., Ltd. Fig. 1 (G) (b) Fig. 1 (C) M (C) Figure 1 (e) 6 (1) 6 Figure 3 (G) Figure 4 (b) Figure 7 (b) Figure 8 (b) Procedural amendment (method) December 29, 1982 Patent Application No. 136196 Name of the invention 2゜Lens holding device 3 Relationship with the case of the person making the amendment Patent applicant h”i 2-43-2 Hatagaya, Shibuya-ku, Tokyo ゎ, 8ゎ (037) Olympus Shigeo Kitamura, President and Director of Kogaku Kogyo Co., Ltd. 4, Agent 6, Number of inventions increased by amendment (1) Amend the application as shown in the attached document. (2) 'lJJmW No. 3 O shell, line 14 Figure 11e
'' is corrected to ``Figure 1 e, fj. (3) Among the figures attached to this application, extract Figures 1 a to f as shown in the attached sheet. 9. Catalog of interlocking figures (1) Application Cao 1 (2) Corrected drawings 1 copy Fig. 1 (Q) (b) 1N Kaisho 5!l-28108 (13) Fig. 1 (C) (d) No. (1〕tsubo 6 (f) 6 7:・Near procedural amendment (voluntary) March 23, 1980 Commissioner of the Japan Patent Office Kazu Sugi Public ■ Indication of the case 1982, t7 粁 Application No. 13ti9S1, Title of invention 2, Lens holding device 3, Make amendments Relationship with the case of Takehan, Lee ut2M; East"J""lj:'1."!, Tani IK't'Jtani2-J'l)143 'in2'
Mr. J Name (Name) (037); J-Lympnu Optical Industry 1' (, Formula ≦, 11 Managing Director Shigeru Kitamura Male 4, Agent 8 Contents of Amendment The description in line 1 is amended as follows. [30... Lens frame 31.53... Lens barrel material 31a@... Partial annular piece 32.54... Lens fitting part 32a... Sleeve fitting part 33... Threaded part 34... ... Holding ring 35 ... Elastic body 40 ... Self-deformation absorbing lens 40a @ ... Plastic lens 41 ... Plastic lens body 42.50. 44... Foamed part 460, Lens anchor 47... Fitting part anchor 48... Skin 50a, fist, partial annular piece 51 fight... Deformation absorbing sleeve 51a@Ki, Lens fitting part 51b... Lens frame fitting part 52...Rhombic absorption button 52a, fist...End part 55...e Friction damping member 55a...Flange 600, Fitting grooves 61a, 61bO, Holding piece 62...Skewer spacing part 63... - Body protrusion 64... Lens protrusion (2) Figure 4 in the figure is corrected as shown in the attached sheet. 9. Attached list of roses (1) Correction drawing 1 copy No. 4
Figure (b)

Claims (1)

[Scope of Claims] (11) In a lens holding device for fixing a lens housed in a lens frame with a holding ring, a lens deformation absorbing portion is provided between a lens fitting portion of the lens frame and the lens, and a lens deformation absorbing portion is provided between the lens fitting portion of the lens frame and the lens. A lens holding device characterized in that it is constructed by providing an elastic portion in the holding portion. (2) In the lens holding device for fixing a lens housed in a lens frame by a holding portion, the lens is attached to the outer periphery of the lens body of the lens. A lens holding device characterized by having several deformation absorbing parts integrated therein and providing an elastic M on the lens and the presser fRr#JJ. (3) The lens housed in the lens frame is held by the presser ring. A lens holding device for fixing, characterized in that a lens deformation absorbing portion is integrally provided in the lens fitting portion of the lens frame, and an elastic portion is provided in the lens and the holding portion. (4) ) A lens holding device in which a lens housed in a lens frame is fixed by a holding ring, wherein a deformation absorbing sleeve is interposed between a lens fitting part of the lens frame and the lens fitted therein, and a deformation absorbing sleeve is interposed between the lens and the holding ring. A lens holding device characterized in that it is constructed by providing an elastic part on the inside of the lens holding device. (5) In a lens holding device for fixing a lens housed in a lens frame by pressing, the lens holding device has an elastic part on the inside of the lens frame. A lens holding device characterized in that it is configured by providing an absorbing beam, holding the lens by the deformation absorbing beam, and providing an elastic portion between the lens and the holding portion. In the lens holding device fixed by a holding ring, a deformation absorbing beam is provided on the lens frame, and a friction damping member is interposed between the deformation absorbing beam and the lens to fit the lens into the lens frame and to connect the lens with the lens. A lens holding device characterized in that it is constructed by providing an elastic part in the weight of the presser. A lens holding device characterized in that it is constructed by providing a plurality of deformation absorbing protrusions between the lenses that fit into the lens, and providing an elastic portion on the lens and the presser weight. (8) At the outer peripheral portion of the lens body. The lens holding device according to item 2, wherein the integrally provided lens deformation absorbing portion is provided offshore from the minimum thickness portion of the lens body. (9) The lens deformation absorbing portion is a mirror. The lens holding device according to claim 2, comprising an engaging portion for engaging the lens fitting portion of the frame. α [The lens deformation absorbing part provided integrally on the outer periphery of the lens body connects a foam layer with a skin layer to the outer periphery of the lens body, and also connects the engagement part with the lens fitting part of the lens frame to this foam layer. A lens holding device according to claim 2, comprising: 01) A patent claim in which the lens deformation absorbing portion integrally provided in the lens fitting portion of the lens frame consists of a plurality of thin-walled irregularly carved IIJs and recess portions that are intermittently protruded in the circumferential direction of the lens fitting portion. The lens holding device according to item 3. (121 Claim 3, wherein the lens fitting portion integrally provided with the lens deformation absorbing portion is provided with a lens barrel attachment portion that protrudes intermittently along the circumferential direction of the lens fitting portion. The lens holding device according to claim 4.a9) The lens holding device according to claim 4, wherein the deformation absorbing sleeve is a ring formed of a material such as ABS resin having a low modulus of elasticity.04) The deformation absorbing sleeve comprises: Claim 5, comprising a deformation absorbing beam or a plurality of deformation absorbing beams protruding intermittently along the circumferential direction of the lens barrel mounting portion of the lens frame.
Lens holding device as described in section. 09 The lens held by the deformation absorbing beam has a special feature in which the outer peripheral edge thereof is provided with an annular fitting groove into which the deformation absorbing beam is fitted, and a plurality of fitting grooves corresponding to the deformation absorbing beam provided intermittently. The lens holding device according to item 5, in which the range of 1'Fil is determined. (161) The lens holding device according to claim 6, wherein the deformation ψ and the convergence beam are comprised of a plurality of deformation absorbing millets in an arc shape along the circumferential direction of the lens fitting portion of the bell frame.07) The lens holding device according to claim 6. 7. The lens holding device according to claim 6, wherein the friction damping member is an annular body made of a Teflon-based synthetic resin material. 8. The lens holding device according to claim 7, wherein the deformation absorbing protrusion comprises a plurality of protrusions having a hemispherical cross section and integrally protruding from the stylish lens barrel mounting portion. [alpha]9 The lens holding device according to item 7, wherein the deformation absorbing protrusion comprises a plurality of protrusions having a hemispherical cross section integrally protruding from the outer peripheral edge of the lens. (2) The elastic portion provided on the lens and the presser weight consists of an elastic layer in which an elastic member such as rubber or synthetic rubber is integrally adhered to the presser ring by lining or the like. 2nd term, 3rd term, 4th term! 'ri% phase 5,
The lens holding device jK4゜ (21) according to item 6 or 7, the presser stone is formed of a synthetic resin containing a carbon material with a high elastic modulus, 3 fibers, etc., and the ntl elastic part is made of ABS with a low elastic modulus. Claims 1, 2, and 3, which are made of resin or the like and are integrally formed by double molding or C31 insert molding.
The lens holding device according to item 4, 5, 6, or 7.