JP2003233104A - Diopter adjusting device for camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diopter adjusting device which can be assembled easily because of its simple arrangement and also achieves reduction of the number of parts. <P>SOLUTION: The diopter adjusting device of a camera in which the diopter of a finder is adjusted by moving a diopter adjusting lens in an optical axis direction possesses an operation means (diopter adjusting konb 71) in which an operation part operated by a photographer and a driving part (cam groove 71a) to move the diopter adjusting lens in the optical axis direction are integrally formed. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diopter adjusting device provided in a viewfinder of a camera.

[0002]

2. Description of the Related Art A conventional camera is equipped with a diopter adjusting device which allows a photographer to adjust the diopter of a finder for observing a photographed subject. This device changes the diopter by moving a part of the lens constituting the finder in the optical axis direction. 10 and 11 are perspective views of a camera provided with a conventional general diopter adjustment device. The viewfinder eyepiece window is located on the back of the camera and the diopter adjustment knob is located near it.The photographer can operate the diopter adjustment knob to operate the lens that constitutes the viewfinder inside the camera to obtain the appropriate diopter. it can.

Details showing an example of a conventional diopter adjusting device are shown in FIGS. 12 and 13. FIG. As shown in FIG. 12, the diopter adjustment knob 91 and the cam 92 are the base plate 12 for holding the finder lens.
, And is fixed so as to be sandwiched from the front and rear by screws 94. The eyepiece lens 27 is an integrally formed shaft 27b.
The eyepiece lens 27 can be guided and moved in the optical axis direction by inserting the lens into the guide portion 12b of the main plate 12. The contact portion 27 a of the eyepiece lens 27 is the cam surface 92 of the cam 92.
The coil spring 93 is arranged so as to come into contact with b, and gives a biasing force. In addition, the unevenness 12 that generates a click feeling
The arm 92a of the cam 92 is in contact with a. When the diopter adjustment knob 91 is rotated, the cam 92 moves the eyepiece lens 27 in the optical axis direction with a click feeling, and the diopter changes. Here, FIG. 13 is a view after assembly of the conventional diopter adjustment device.

The diopter adjusting device as described above is disclosed in, for example, Japanese Patent Laid-Open Nos. 2001-174877 and 2001-2155.
66, Japanese Patent Laid-Open No. 11-202384, and the like. In either device, an operation knob operated by a photographer and a drive unit for operating a diopter adjustment lens in the finder are configured as separate parts, and are assembled by sandwiching them from the front-back direction of the camera.

[0005]

However, in the diopter adjusting apparatus as described above, the operation knob operated by the photographer and the driving section for operating the diopter adjusting lens in the viewfinder are formed as separate parts, and the camera is used. Since it is assembled so that it is sandwiched from the front-back direction, it is necessary to fix it with screws after assembling it while aligning the phase of each part from the front-back direction of the camera, which reduces workability and reduces the number of parts. Was also an obstacle.

An object of the present invention is to provide a diopter adjusting device having a simple structure, excellent assembling workability, and effective in reducing the number of parts.

[0007]

In a diopter adjusting device for a camera according to the present invention, a diopter adjusting device for a camera for moving a diopter adjusting lens in an optical axis direction to adjust the diopter of a finder is used. It is characterized in that it has an operating means integrally formed with an operating section operated by the above and a driving section for moving the diopter adjustment lens in the optical axis direction.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A first embodiment of the present invention will be described below.

FIG. 1 is a perspective view of a viewfinder device of a camera to which the first embodiment of the present invention is applied. As shown in FIG. 1, in the finder device of the present embodiment, the finder base plate 1
Reference numerals 1 and 12 denote objective lenses 21 to 24 and prisms 25 and 26.
And holds the eyepiece lens 27. Further, the lens holding member 31 holds the objective lens 22, the objective lenses 22 to 24 are guided in the optical axis direction by the guide bar 32, and the objective lenses 22 to 24 interlock with the operation of the lens barrel. This allows the lens barrel to move in the optical axis direction in conjunction with zooming. 33 is a spring that biases the objective lenses 22 and 23, and 41 is an AF unit.

2 and 3 show details of the diopter adjustment device to which the first embodiment of the present invention is applied. The diopter adjustment knob 71 has a cam groove 71a and a protrusion 71b for preventing slippage, and
A leaf spring 72 is inserted between the two. In the cam groove 71a of the diopter adjustment knob 71, the contact portion 27a of the eyepiece lens 27 is provided.
Fit together. Therefore, when the cam groove 71a is operated by the rotation of the diopter adjustment knob 71, the diopter is changed by operating the eyepiece lens 27 in the optical axis direction in conjunction with it.

The projection 71b of the diopter adjustment knob 71 is provided so as to coincide with the notch 12c of the main plate 12. Therefore, at the time of assembly, the projection 71b of the diopter adjustment knob 71 and the notch 12c of the main plate 12 can be assembled in a phase that matches, and when the diopter adjustment knob 71 is rotated to the adjustment use phase after assembly, Protrusion 71b
Comes into contact with the irregularities 12a of the base plate 12. Diopter adjustment knob 7
The protrusion 71b is pressed against the unevenness 12a of the base plate 12 by the biasing force of the leaf spring 72 provided between the base plate 12 and the base plate 12. Therefore, by rotating the diopter adjustment knob 71 when using the diopter adjustment, the projection 71b is prevented from coming off, and
A proper click feeling will be obtained. FIG. 3 is a detailed view of the diopter adjustment device after assembly.

4 and 5 are detailed perspective views of the diopter adjustment knob 71. Reference numeral 71c is a rotation restricting stopper that restricts rotation so that the diopter adjustment knob 71 does not rotate more than the adjustment use phase after assembly. The rotation amount of the stopper 71c that regulates the rotation of the diopter adjustment knob 71 is regulated by, for example, providing a regulation projection on another component such as an exterior, and the diopter adjustment knob 71 after assembly is adjusted by the adjustment use phase. It is possible to rotate only during.

FIG. 6 is a rear view of the diopter adjustment knob 71. FIG. 7 is a development view of the cam portion of the diopter adjustment knob 71. As shown, in this embodiment, the diopter adjustment knob 71 is used.
Two protrusions 71b are provided on the. The cam groove 7
1a has a groove 71f for assembling and a diopter adjustment knob 71f.
The adjustment adjustment use phases 71d to 71e are provided outside the section. During the assembling, the contact portion 27a of the eyepiece lens 27 passes through the assembling groove 71f and the adjustment use phase 71d-
Installed up to 71e.

(Second Embodiment) The second embodiment of the present invention will be described below.

FIG. 8 and FIG. 9 show details of the diopter adjusting device to which the second embodiment of the present invention is applied. The diopter adjustment knob 81 has a cam surface 81a and a protrusion 81b for preventing it from coming off.
The cam surface 81a is always in contact with the contact portion 27a of the eyepiece lens 27 by the biasing force of the coil spring 93. Therefore, when the cam 81a is operated by the rotation of the diopter adjustment knob 81, the diopter is changed by operating the eyepiece lens 27 in the optical axis direction in conjunction therewith.

The projection 81b of the diopter adjustment knob 81 is provided so as to match the notch 12c of the main plate 12. Therefore, at the time of assembly, the projection 81b of the diopter adjustment knob 81 and the notch 12c of the base plate 12 can be assembled in a phase that matches, and when the diopter adjustment knob 81 is rotated to the adjustment use phase after assembly, Protrusion 81b
Comes into contact with the irregularities 12a of the base plate 12. In addition, the protrusion 81 b is caused by the urging force of the coil spring 93, and
Being pressed against. Therefore, by rotating the diopter adjustment knob 81 when using the diopter adjustment, the projection 81b can be prevented from coming off and an appropriate click feeling can be obtained. FIG. 9 is a detailed view of the diopter adjustment device after assembly.

Further, similarly to the first embodiment, a stopper is provided for restricting rotation after the diopter adjustment knob 81 is assembled so that it does not rotate more than the adjustment use phase. The rotation amount of the diopter adjustment knob 81 is regulated by providing a regulation projection, and the assembled diopter adjustment knob 81 can be rotated only during the adjustment use phase.

[0018]

As described above, the first to third aspects of the present invention are described.
2. In the diopter adjusting device for a camera to which claim 7 is applied, an operation performed by a photographer in the diopter adjusting device for the camera that moves the diopter adjusting lens in the optical axis direction to adjust the diopter of the finder. Since the unit and the driving unit for moving the diopter adjusting lens in the optical axis direction are integrally formed, the number of components can be effectively reduced.

In the diopter adjusting device for a camera to which the third and eighth aspects are applied, a holding member for holding the diopter adjusting lens is provided, and the holding member has a concavo-convex shape coaxial with the rotation center of the operating means. Since the protrusion provided in the circular shape on at least one of the operating means contacts the unevenness in the diopter adjustment range, it is possible to provide a mechanism for reducing the number of parts and providing a click feeling. .

According to the diopter adjusting device for a camera to which the fourth and ninth aspects are applied, since the projection has a biasing means for pressing the projection of the operating means against the unevenness of the holding member, when the operating means is rotated, an appropriate click is made. You can get a feeling.

In the diopter adjusting device for a camera to which the present invention is applied, the cam groove of the operating means is provided substantially parallel to the rotation axis direction outside the diopter adjusting range of the operating means. Therefore, the assembling is completed by assembling the holding member (base plate) from one direction at the time of assembling, and the assembling efficiency is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing components of a finder of a camera to which a first embodiment of the present invention has been applied.

FIG. 2 is a perspective view showing components of a diopter adjustment device for a camera to which the first embodiment of the present invention has been applied.

FIG. 3 is a perspective view showing components of a diopter adjustment device for a camera to which the first embodiment of the present invention has been applied.

FIG. 4 is a perspective view showing a diopter adjustment knob of a camera to which the first embodiment of the invention is applied.

FIG. 5 is a perspective view showing a diopter adjustment knob of a camera to which the first embodiment of the invention is applied.

FIG. 6 is a rear view showing the diopter adjustment knob of the camera to which the first embodiment of the invention is applied.

FIG. 7 is a diagram showing a cam shape of a diopter adjustment knob of a camera to which the first embodiment of the invention is applied.

FIG. 8 is a perspective view showing components of a diopter adjustment device for a camera to which a second embodiment of the present invention has been applied.

FIG. 9 is a perspective view showing components of a diopter adjustment device for a camera to which a second embodiment of the present invention has been applied.

FIG. 10 is a perspective view of a camera including a general diopter adjustment device.

FIG. 11 is a perspective view of a camera including a general diopter adjustment device.

FIG. 12 is a perspective view showing components of a conventional diopter adjustment device for a camera.

FIG. 13 is a perspective view showing components of a conventional diopter adjustment device for a camera.

[Explanation of symbols]

11, 12 Finder main plate 21-24 Finder Objective Lens 25, 26 Finder prism 27 viewfinder eyepieces 31 Lens holding member 32 Guide bar 33 spring 41 AF unit 51 camera body 61 lens barrel 62 Finder objective window 63 Strobe window 64 viewfinder eyepiece window 71 Diopter adjustment knob (operating means) 72 Leaf spring (biasing means) 81, 91 Diopter adjustment knob (operating means) 92 cam 93 Coil spring (biasing means) 94 screws

Claims (10)

[Claims] 1. A diopter adjusting device for a camera, which adjusts the diopter of a finder by moving the diopter adjusting lens in the optical axis direction, wherein an operating section operated by a photographer and the diopter adjusting lens are arranged in the optical axis direction. A diopter adjustment device for a camera, which has an operating means integrally formed with a driving unit for moving the camera to the front. 2. The diopter adjustment device for a camera according to claim 1, wherein the drive unit is formed of a cam groove, and the cam groove operates by contacting the drive unit of the diopter adjustment lens. . 3. A holding member for holding the diopter adjustment lens, wherein the holding member is provided with concavities and convexities in a circular shape coaxial with the rotation center of the operation means, and the operation is performed in the diopter adjustment range. The diopter adjusting device for a camera according to claim 2, wherein at least one protrusion provided on the means abuts on the unevenness. 4. The diopter adjustment device for a camera according to claim 3, further comprising a biasing unit that presses the projection of the operation unit against the unevenness of the holding member. 5. The camera according to claim 2, wherein the cam groove of the operating means is provided substantially parallel to the rotation axis direction outside the range of diopter adjustment by the operating means. Diopter adjustment device. 6. The camera according to claim 2, wherein the unevenness of the holding member is provided with a groove substantially parallel to the rotation axis direction outside the range of diopter adjustment by the operating means. Diopter adjustment device. 7. The diopter adjustment device for a camera according to claim 1, wherein the drive unit is formed of a cam, and the cam operates by contacting a drive shaft of the diopter adjustment lens. 8. A holding member for holding the diopter adjustment lens, wherein the holding member is provided with concavities and convexities in a circular shape coaxial with a rotation center of the operation means, and the operation is performed in the diopter adjustment range. 8. The diopter adjustment device for a camera according to claim 7, wherein at least one protrusion provided on the means abuts on the unevenness. 9. The diopter adjustment device for a camera according to claim 8, further comprising a biasing unit that presses the projection of the operation unit against the unevenness of the holding member. 10. The camera according to claim 7, wherein the unevenness of the holding member is provided with a groove substantially parallel to the rotation axis direction outside the range of diopter adjustment by the operating means. Diopter adjustment device.