JPH05150149A - Optical equipment device - Google Patents

Abstract

PURPOSE:To obtain constitution which is simple and damages none of peripheral components, etc., by unitizing a light quantity adjustment device incorporated in a lens barrel. CONSTITUTION:The optical equipment device is constituted by fitting a stop unit 1 which is unitized in a plate shape from a slit opening formed in the peripheral surface of the lens barrel 10; and the lens barrel 10 is provided with guide grooves 11 and 12 on the outer and inner sides in the fitting direction and the substrate 2 of this stop unit is provided with guide pins 4 and 5 which engages the guide grooves. Those pins engages the grooves to guide the fitted stop unit, a click type engagement fixing means which is clicked at the final stage of the fitting is provided, and the pins engage the grooves before the click fixing means is clicked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens barrel in which, for example, a focusing optical system, a variable power optical system, etc. are installed, and in particular, an optical device apparatus having a structure in which a united diaphragm mechanism is fitted inside the lens barrel. It is about.

[0002]

2. Description of the Related Art In recent years, for example, in steel cameras, video cameras, etc., there is a tendency to adopt a two-blade or three-blade diaphragm device (light quantity adjusting device) which operates with a small driving force due to automation and computerization. In addition, many program shutters have been used by combining the shutter blades of the lens shutter with the diaphragm blades.
These diaphragm devices are generally provided as a single unit of the diaphragm device for the purpose of unitizing parts and simplifying the assembly process, and are fixed to the lens barrel by screwing or the like during assembly. It is normal to be present.

[0003]

However, as described above, in the optical device having the structure in which the diaphragm device is screw-fastened to the lens barrel, it is necessary to screw-fasten the screw at a plurality of points. There are many problems that the cost of the product is increased.

Further, in this screw tightening method, it is usual that no special means for temporarily fixing the diaphragm unit to a predetermined built-in position in the lens barrel is provided before screw tightening. In addition, the unit may be displaced from the correct mounting position, and it may interfere with other components built in the lens barrel to damage these components and the diaphragm unit itself.

The object of the present invention is to solve the above-mentioned problems of the conventional optical apparatus, to eliminate the need for screw tightening work when the diaphragm unit is assembled, and to easily fit the diaphragm unit in a correct position. An object of the present invention is to provide an optical device having a structure that can be mounted and that does not cause interference or damage to peripheral members and the like.

[0006]

The features of the optical apparatus according to the present invention for achieving the above-mentioned object are that a unitized diaphragm unit and this diaphragm unit are inserted from the opening of the peripheral surface toward the inside of the lens barrel. An optical device having a lens barrel to be assembled together, wherein a groove provided corresponding to the sliding contact portion between the diaphragm unit and the lens barrel into which the aperture unit is fitted and corresponding to each other; A diaphragm unit fitting guide having a combination of engaging projections, and a hooking means provided corresponding to the lens barrel and the diaphragm unit so as to prevent the diaphragm unit from being pulled out and fixed at the final stage of the operation of fitting the diaphragm unit. The engaging means includes a claw provided on either one of the lens barrel or the diaphragm unit, a claw climbing surface on the other of these claws, and a rear surface of the claw. And a recessed portion for wearing a claw bullet, which is provided subsequent to the engagement unit, and in particular, a fitting amount required for the groove and the projection of the aperture unit fitting guide means to start engaging is determined by the engaging means. It is preferable to set the claw and the slope for climbing over the claw to be smaller than the amount of fitting required until the engagement starts.

[0007]

According to the present invention having the above-mentioned structure, the fitting guide means of the diaphragm unit is positioned so that the lens barrel and the diaphragm unit are not displaced from each other during the fitting operation when the diaphragm unit is fitted. At the end of the fitting operation, the click type engaging means engage with each other to fix the diaphragm unit, so that stable and simple fitting work can be performed without the need for screw tightening work.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings.

Embodiment 1 FIG. 1 is a view of a diaphragm unit formed in a substantially rectangular plate shape as seen from the optical axis direction (direction perpendicular to the paper surface), and FIG. 2 shows the lens barrel at the diaphragm unit insertion position. Cross-sectional view, FIG.
4 and FIG. 4 are views showing a stage during the fitting and a final stage when the diaphragm unit is mounted on the lens barrel.

The diaphragm unit 1 shown in FIG. 1 is inserted in a posture perpendicular to the optical axis through an opening 20 provided in a slit shape on the peripheral surface of the lens barrel 10 shown in FIG. Thus, the insertion guide means provides a stable posture.

As shown in FIG. 1, the diaphragm unit 1 of this embodiment is composed of a horizontally symmetrical plate-shaped substrate 2 which is vertically long and has an arc-shaped upper side along the inner surface of the lens barrel.

On the other hand, as shown in FIG. 2, the lens barrel 20 has a slit-like hole provided perpendicularly to the optical axis from the outer wall to the inner wall of the lens barrel. The lateral dimension (the dimension in the left-right direction in the drawing) is set to be slightly larger than the lateral width of the substrate 2 of the diaphragm unit 1 so that the fitting is not hindered. That is, the lens barrel 10 at the position of the opening 20 is sandwiched between the hollow portions 21 of the lens barrel 10 and the lens barrel 10 shown in FIG.
The slit-shaped first concave portions 22 are formed in the upper and lower portions of the
Further, the second concave portion 23 is provided to form a slit-shaped space as a whole, and the diaphragm unit 1 is fitted along the fitting hole portion 20.

The diaphragm unit 1 and the lens barrel 10 are provided with the following relational structure. Four
Reference numerals 5 and 5 are guide pins (projections) for guiding the fitting of the aperture unit 1 together with guide grooves 11 and 12 on the lens barrel side which will be described later. That is, 4 is a first guide pin provided in the upper part of the drawing, which is provided in the vicinity of the center of the upper side of the substrate 2 so as to project to the back surface side of the drawing as shown by the dotted line, and the diaphragm unit 1 is attached to the lens. When it is fitted in the lens barrel 10, it engages with the first guide groove 11 provided in the first recess 22 shown in FIG. 2 so as to define the assembling position / posture of the diaphragm unit 1. ing. 5 is the lower second guide pin,
The board 2 is provided near the center of the board 2 so as to project to the back side of the drawing as shown by the dotted line, and is fitted into the second guide groove 12 provided in the second recess 23 to be installed at the mounting position. Are specified.

Reference numerals 6 and 6 denote claw portions provided on both side edges of the substrate 2 of the diaphragm unit 1 constituting a click-type engaging portion, which are provided so as to project outside the substrate 2 and are shown in FIG. Thus, it has an inclined surface 6a facing upward in the drawing, and subsequently, an engaging surface 6b which is perpendicular to the side edge of the substrate. 1
Reference numerals 3 and 13 are claws on the lens barrel side, and as shown in FIGS. 2 to 4, when the aperture unit 1 is fitted, the slanted surface 13a comes into contact with the slanted surface 6a of the claw 6 from above and the claws when the fitting is completed. It has an engaging surface 13b for engaging with the engaging surface 6b of 6 and for stopping the stop of the diaphragm unit 1.

With such a structure, when the diaphragm unit 1 is pushed up from below along the fitting hole 20 of the lens barrel 10, the claws 6 and 6 ascend along the slope 13a, and the horizontal portion 6a is lifted. When you get over the slope 13a, the slope 13
The claw portion 6 is elastically attached to the recess 14 formed in the rear part of the a to fix the diaphragm unit 1.

In order to give the above-mentioned elasticity of the claw portions 6 and 6, narrow slits 8 and 8 are provided in the vicinity of the claw portions 6 and 6 of the substrate 2.
Is provided.

Next, the diaphragm unit 1 is attached to the lens barrel 1.
The operation for fitting the inside of 0 will be described.

First, the diaphragm unit 1 is inserted into the opening 20 from below in FIG. 2 along a plane perpendicular to the optical axis, and the first guide pin 4 is aligned with the first guide groove 11 as shown in FIG. To set.

Then, when the aperture unit 1 is pushed into the lens barrel 10, as described above, the claws 6 are easily deformed by the slits 8 as the claws 6 rise along the slope 13a. 6 is retracted in the slits 8 and 8 direction. And when the engaging surface 6a gets over the slope 13a,
The claws 6 and 6 elastically land on the recess 14 to fix the diaphragm unit 1.

The lengths and widths of the slits 8 and 8 may be determined according to the material of the substrate 2 and the like so that the claw portion 6 is appropriately deformed.

Further, in this embodiment, when the diaphragm unit 1 is pushed into the lens barrel 10, the claw portions 6 and 6 and the claw portion 1 are pushed.
3 and 13 are engaged with each other in the same plane as the substrate 2, but the structure of the engaging portion is changed and the claw portions 6 and 6 and the claw portion 1 are changed.
It is also possible to adopt a structure in which the substrates 3 and 13 are engaged with each other on the front surface or the back surface of the substrate 2.

In the present embodiment, the guide groove is provided on the lens barrel 10 side and the guide pin is provided on the diaphragm unit 1 side. However, this combination is reversed, and the guide pin is provided on the lens barrel 10 side. A guide groove may be provided on the diaphragm unit 1 side.

Further, for example, the claw portions 6, 6 or the claw portion 1
It is possible to select an arbitrary combination such as fixing one of the members 3 and 13 and elastically deforming the other member.

In this example, the dimensional relationship is set so that the claws of the engaging portion are not yet engaged when the first guide pin 4 is engaged with the first guide groove 11. When the claw portion 6 of the diaphragm unit is elastically deformed, the first and second guide pins are engaged with the groove, and the posture of the diaphragm unit can be stably maintained.

According to the present embodiment, the diaphragm unit 1 can be securely fitted only by pushing it into the lens barrel 10. Therefore, unlike the conventional case, the screw tightening work is not required, and the diaphragm unit 1 is Since the diaphragm unit is guided to the assembly position during insertion, the diaphragm unit may interfere with other interior parts in the lens barrel due to misalignment of the diaphragm unit during assembly work, etc. It does not damage the aperture unit itself.

[0026]

As described above, according to the present invention,
When fitting the diaphragm unit into the lens barrel, it is possible to fit by simply pushing in the diaphragm unit.
This eliminates the need for screwing the aperture unit into the lens barrel, simplifies the assembling work, and reduces the cost of the optical system.

Further, since the diaphragm unit is guided to the assembling position during the fitting of the diaphragm unit, the diaphragm unit can be replaced with other interior parts in the lens barrel due to the displacement of the diaphragm unit during the assembling work. There is an effect that they do not interfere with each other and damage the interior parts and the diaphragm unit.

[Brief description of drawings]

FIG. 1 is a view of an aperture unit as seen from an optical axis direction perpendicular to the paper surface,

FIG. 2 is a sectional view of the lens barrel at the position of the aperture unit fitting hole,

FIG. 3 is a view for explaining a state immediately before the first pin of the insertion guide means engages with the first guide groove while the diaphragm unit is being inserted into the lens barrel;

FIG. 4 is a diagram illustrating a state in which the first pin of the insertion guide means is engaged with the first guide groove while the diaphragm unit is being inserted into the lens barrel.

[Explanation of symbols]

1: Diaphragm unit, 2: Substrate, 4: First guide pin (upper part), 5: Second guide pin (lower part), 6: Diaphragm unit side claw part, 8: Slit, 10: Lens barrel, 11 : First guide groove (upper part), 12: Second guide groove (lower part), 13: Lens barrel side claw part, 14: Recess, 20: Fitting hole part, 21: Lens barrel hollow part, 22 : 1st
23: Second recess.

Claims (3)

[Claims] 1. An optical device apparatus having a unitized diaphragm unit and a lens barrel in which the diaphragm unit is fitted and assembled from an opening on a peripheral surface toward the inside of the lens barrel, the diaphragm unit. A diaphragm unit fitting guide having a combination of a groove and an engaging projection provided so as to be engaged with each other, and the diaphragm unit are fitted into a sliding contact portion of the lens barrel with which the lens barrel is fitted. The lens barrel and the engaging means provided corresponding to the diaphragm unit so as to prevent the diaphragm unit from coming off and being fixed in the final stage of the operation, and this engaging means is provided on either the lens barrel or the diaphragm unit. An optical machine comprising: a claw provided, a claw climbing slope provided on either of the other claws, and a claw bullet wearing recess provided subsequent to the rear part of the claw. Equipment. 2. The insertion amount required until the groove and the projection of the aperture unit insertion guide means start to engage with each other until the claw of the engaging means and the slope for climbing over the claw start to engage with each other. An optical instrument device characterized in that it is set smaller than the amount of insertion required for the. 3. The engagement means according to claim 1 or 2, wherein the engaging means is provided in a pair on both side edges in the width direction of the diaphragm unit, and the diaphragm unit fitting guide means is provided at a substantially central position in the width direction of the diaphragm unit. An optical instrument device characterized by the above.