JPH0772362A - Shape of lens for camera - Google Patents

Abstract

PURPOSE:To hold plural lenses at specified intervals without spacing rings by forming plural columnar pins at the corner parts of a rectangular lens in the optical axis direction of the lens and making the pin abut on a flat part formed at the corner part of the adjacent lens. CONSTITUTION:First, the lens 226 is inserted and fixed in a 2nd moving frame. Next, the lens 228 is inserted into the 2nd moving frame and fixed at a position where the columnar spacing pins 232 formed at the four corner parts of the lens 228 abut on receiving parts 226A formed at the corner parts of the lens 226. Then, the lens 230 is inserted into the 2nd moving frame and fixed at a position where the receiving parts 230A formed on the lens 230 abut on the spacing pins 232 on the lens 228. Thus, the interval between the lenses 226, 228 and 230 is kept specified one by the pins 232.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens shape of a camera, and more particularly to a compact camera or a simplified camera-integrated type V.
It relates to a lens shape of a camera applied to TR.

[0002]

2. Description of the Related Art Conventionally, a plurality of lenses used in a photographic optical system or a viewfinder optical system of a camera are held in a lens frame via a ring ring-shaped spacing ring so that the lens spacing is predetermined. It is supposed to be held in.

[0003]

However, in the conventional lens, since the lens interval is maintained by alternately inserting the lens and the interval ring into the lens frame, the number of parts is increased and the assembly is troublesome. There is a drawback that it costs. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a lens shape of a camera that allows lenses to be easily assembled in a lens frame while maintaining a predetermined gap therebetween.

[0004]

In order to achieve the above object, the present invention forms a plurality of columnar pins at the corners of a rectangular lens in the optical axis direction of the lens and adjoins the lens. Form a receiving part consisting of a flat part in the corner of the rectangular lens,
It is characterized in that the pin is brought into contact with a receiving portion of an adjacent lens to hold the lens interval at a predetermined interval.

[0005]

According to the present invention, the cylindrical pin formed at the corner of the lens is brought into contact with the receiving portion composed of the flat portion formed at the corner of the rectangular lens adjacent to the lens. The lens interval can be maintained at a predetermined value. As described above, in the present invention, the lens interval can be maintained without using the interval ring, so that the number of parts can be reduced and the lens frame can be easily assembled.

[0006]

The preferred embodiments of the lens shape of the camera according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a perspective view showing the external appearance of a camera-integrated VTR 10 to which the lens shape of a camera according to the present invention is applied. The camera-integrated VTR 10 is composed of a camera section 12 and a VTR deck section 14, and the camera section 12 is composed of a zoom lens device 16 and a finder section 200. A loading device and the like are provided.

FIG. 2 is a perspective view showing the outline of the camera unit 12 excluding the outer case, and FIG. 3 is a front view of the zoom lens device 16 and the finder unit 200 taken along line 3-3 in FIG. 4 is a sectional view taken along line 4-4 in FIG. 5 and 6 are exploded perspective views of the front half and the rear half of the zoom lens device 16. The zoom lens device 16 and the finder unit 200 are arranged in parallel in the case 18 shown in FIGS. 2 and 3, and the zoom lens device 16 includes the front frame 20, the fixed frame 22, and the first frame as shown in FIGS. The movable frame 24, the iris unit 26, and the second movable frame 28 are main components. Case 1 compatible with the zoom lens device 16
A CCD unit 30 is attached to the rear of the unit 8. A side cam barrel 32, which will be described later, is arranged in parallel with the photographing optical axis 34 on the side of the zoom lens optical system of the case 18.

As shown in FIG. 5, a protective glass 36 is attached to the opening 20A of the front frame 20, and the front frame 20 has a claw portion 38 formed on the upper portion thereof for the first moving frame 24. By being locked in the hole 40 of the first moving frame 24
Fixed to. The fixed frame 22 is a front edge 1 of the case 18.
9 is fixed by screws 42, 42. On the other hand, three taking lenses 44, 46, and 48 are fixed to the first moving frame 24 via a lens frame 50. The iris unit 26 is fixed to the front side of the second moving frame 28 with screws 52, 52, and the iris meter 27 of the iris unit 26 is inserted into the opening 27A of the second moving frame 28.

Further, three lenses 54, 56 and 58 are attached to the second moving frame 28 via a spacing ring 60 and a stopper ring 62. In the case 18, five guide rods 64, 66, 68, 7 are arranged in parallel with the photographing optical axis 34.
0 and 72 are arranged, and the front ends of the guide rods 64 to 72 are
The rear end is press-fitted and fixed in the holes formed in the fixed frame 22, and the rear end is press-fitted and fixed in holes (not shown) formed in the rear wall of the case 18.

In the first moving frame 24, the guide rod 66 is inserted through the guide holes 74, 74 formed in the upper portion of the first moving frame 24, and the guide rod 72 is positioned in the steady rest groove 76. , 72, and can be moved back and forth. Further, the guide rod 68 is inserted into the guide hole 82 of the connecting piece 80, which will be described later, and the guide rod 64 is positioned in the steady rest groove 84 of the connecting piece 80.

In the second moving frame 28, the guide rod 64 is inserted into the pair of guide holes 88, 88, and the guide rod 72 is positioned in the steady rest groove 90.
It can be moved back and forth by being guided by the guide rods 64 and 72. On the other hand, the side cam barrel 32 shown in FIG. 6 is arranged laterally of the first moving frame 24 and the second moving frame 28.
A shaft 92 is inserted and fixed in the side cam barrel 32. The front end 94 of the shaft 92 is pivotally supported in the hole 96 of the fixed frame 22 as shown in FIG.
The shaft 8 is pivotally supported by the hole 100 of the case 18 as shown in FIG.

A gear 110 is formed integrally with the shaft 92, and the gear 110 is meshed with a gear 114 of a motor 112 which will be described later. Therefore, the side cam barrel 32 is rotated by transmitting the driving force from the motor 112 via the gears 114 and 110. As shown in FIG. 6, four cam grooves 116, 118, 12 are provided on the outer peripheral surface of the side cam barrel 32.
0, 122 are formed. A cam 124 is formed at the rear edge of the side cam barrel 32, and the cam 124 is engaged with an end 128 of a display plate 126 (see FIG. 3) described later.

The cam 116 has a connecting piece 80 shown in FIG.
Driven pin 130 is inserted. The connection piece 80 is
The upper end 80 </ b> A of the connecting piece 80 is connected to the projecting piece 25 fixed to the first moving frame 24 via the extension spring 86, and the upper end 80 </ b> A of the connecting piece 80 is moved by the urging force of the extension spring 86.
Is pressed against the front side portion 78 of the. As a result, the first moving frame 24 moves the optical axis 34 by the urging force of the tension spring 86.
Is urged toward the front of. In addition, the tension spring 8
No. 6 has a spring force that allows the first moving frame 24 to escape to the camera rear side with respect to the connecting piece 80 when an external force is applied to the first moving frame 24.

A driven pin 132 of the second moving frame 28 shown in FIG. 6 is fitted into the cam 118. Therefore, when the side cam barrel 32 is rotated, the first moving frame 24 and the second moving frame 28 move toward each other along the cams 116 and 118 on the photographing optical axis 34 (tele side direction) and away from each other (telephoto side direction). It is possible to move back and forth in the wide side direction). As a result, the photographing magnification of the subject image can be changed.

As shown in FIGS. 2 and 7, the finder section 20 is used.
The finder body 202 of No. 0 is fixed to the side opening 206 (see FIG. 6) of the case 18 by screws 204, 204. The finder body 202 includes a fixed frame 2
08, front moving frame 210, rear moving frame 212, display plate 12
6 and a plurality of prisms described later are held. A guide plate 214 is formed on the finder body 202 so as to project forward, and the front moving frame 2 is attached to the guide plate 214.
10 and the rear moving frame 212 are arranged on the finder optical axis 216. Further, the front moving frame 210 and the rear moving frame 212 are
The guide pins 218 and 220 fixed to the side surface of the guide plate 214 are fitted in the straight grooves 222 formed in the side surfaces of the guide plate 214, so that the guide pins 218 and 220 can be moved back and forth along the straight grooves 222.

The front moving frame 210 has a variable power lens 224.
Further, three correction lenses 226, 228 and 230 are attached to the rear moving frame 212. As shown in FIG. 8, the lens 228 is made of plastic and has a rectangular shape. At four corners of the lens 228, as shown in FIGS. 9 and 10, two columnar spacing pins 232 and 2 are provided.
32 ... Are integrally formed so as to project toward the lenses 226 and 230 in the direction of the finder optical axis 216.

As shown in FIG. 11, the lenses 226 and 230 are formed in a rectangular shape, and flat receiving portions 226A and 230A are formed at their four corners. The lenses 226, 228, 2 are attached to the receiving portions 226A, 230A.
When the lens 30 is attached to the rear moving frame 212, the lens 2
28 spacing pins 232, 232, ... Are brought into contact with each other. Therefore, the spacing pins 232, 232 ... Serve as spacing rings.

The lens 224 held by the first moving frame 210 is also formed in a rectangular shape like the lenses 226 and 230. The driven pins 234 and 236 of the front moving frame 210 and the rear moving frame 212 are, as shown in FIG.
The cam groove 120 formed in the side cam barrel 32,
122 is fitted. As a result, the front moving frame 210 and the rear moving frame 212 move back and forth along the cam grooves 120 and 122 on the finder optical axis 216 by rotating the side cam barrel 32, and the first moving frame 24 and the second moving frame. A subject image scaled by 28 and a subject image of approximately the same magnification are formed on the eyepiece.

On the other hand, the display plate 126 is fixed to the guide rod 238 and arranged behind the rear moving frame 212. The guide rod 238 is pivotally supported on the finder body 202. As a result, the display plate 126 is rotatable together with the guide rod 238. In addition, the fixed frame 208 includes the screw 2
It is fixed to the front surface of the guide plate 214 by 40 and 240.

On the other hand, a first prism 242 is provided behind the rear moving frame 212, and the first prism 242 is provided.
Are stored in the prism frame 243. As a result, the light incident from the front surface of the first prism 242 is refracted by 90 ° by the first prism 242 and is emitted upward. A field frame 24 is provided at a position where the emitted light is focused.
4 are provided.

A second prism 246 is provided above the field frame 244, and the second prism 246 is housed in the prism frame 248. As a result, the light incident from the bottom surface of the second prism 246 is not reflected by the second prism 4
The light is refracted by 90 ° by 62 and emitted toward the rear eyepiece. Behind the second prism 246, the spacer 2
50 is provided, and the light refracted by the second prism 250 is transmitted through the spacer 250 to the eyepiece 25 shown in FIG.
It is emitted toward 2.

Next, the operation of the zoom lens device and the finder section configured as described above will be described. First, the motor 112 is driven in the normal direction to drive the side cam cylinder 3 shown in FIG.
When 2 is rotated in the clockwise direction (wide side direction), the first
The movable frame 24 is pulled by the tension spring 86 and moves toward the front of the photographing optical axis 34 together with the connecting piece 80, and the second movable frame 28 moves toward the rear of the photographing optical axis 34 along the cam 118. Thereby, the photographing magnification can be changed to the wide side. The front moving frame 2 is linked with the movement of the first moving frame 24 and the second moving frame 28 of the finder 200.
10 and the rear moving frame 212 are the cam grooves 1 of the side cam barrel 32.
It moves back and forth along the finder optical axis 216 along 20, 122, and forms a subject image at a magnification approximately equal to the magnification scaled by the zoom lens optical system on the eyepiece 252 of the finder.

Next, the motor 112 is reversely driven, and the motor shown in FIG.
When the side cam barrel 32 shown in FIG. 6 is rotated counterclockwise (tele side direction), the first moving frame 24 is pushed by the connecting piece 80 and moves toward the rear of the photographing optical axis 34, and the second moving frame 28. Moves along the cam 118 toward the front of the photographing optical axis 34. Thereby, the photographing magnification can be changed to the tele side. In addition, the first moving frame 2 of the finder unit 200
4 and the second moving frame 28, the front moving frame 210
And the rear moving frame 212 move back and forth along the cams 120 and 122 on the finder optical axis 216, and a subject image of a magnification substantially equal to that of the zoom lens optical system is displayed on the eyepiece 252 of the finder. Form.

By the way, the second part of the finder section 200
Lenses 226, 228, 23 held by the moving frame 212
For 0, first, the lens 226 is inserted and fixed in the second moving frame 212. Next, the lens 228 is inserted into the second moving frame 212, and the spacing pin 232 formed on the lens 228,
The receiving portions 226 in which the lenses 232 are formed at the corners of the lens 226.
A, 226A ... Fix at the position where it abuts. Next, the lens 230 is inserted into the second moving frame 212, and the lens 23
The receiving portions 230A, 230A ...
28 is fixed at the position where it abuts on the spacing pins 232, 232.

As a result, the lenses 226, 228, 23
The interval of 0 is held at a predetermined interval by the interval pins 232, 232. Therefore, according to the lens shape of the present embodiment, since the lens interval can be formed without using the interval ring, the number of parts is reduced and the second moving frame 212 is also provided.
The lenses 226, 228, and 230 can be easily attached to the.

Further, in this embodiment, since the spacing pin 232 is formed at the corner of the rectangular lens 228, the lens 22 is formed.
8 does not adversely affect the performance. In this embodiment, four spacing pins 232 are formed at the four corners of the lens 228, but the number of spacing pins 232 can be three.
Further, in this embodiment, the spacing pin 2 is provided on both surfaces of the lens 228.
Although 32 is formed, when two lenses are held, they may be formed on one side.

Further, in this embodiment, the shape of the lens used in the finder section has been described, but the taking lens used in the zoom lens apparatus may be formed in the same shape as the lens in the finder section. good.

[0028]

As described above, according to the lens shape of the camera of the present invention, the cylindrical pin formed at the corner of the lens is formed at the corner of the rectangular lens adjacent to this lens. Since the lens interval can be maintained at a predetermined interval by abutting against the receiving part formed of the flat part, the number of parts can be reduced and the lens frame can be easily assembled.

[Brief description of drawings]

FIG. 1 is a perspective view of a camera-integrated VTR to which a lens shape of a camera according to the present invention is applied.

FIG. 2 is a perspective view of a camera unit to which a lens shape of a camera according to the present invention is applied.

FIG. 3 is a front view of the zoom lens device and the viewfinder section taken along line 3-3 in FIG.

4 is a cross-sectional view of a zoom lens device and a finder portion taken along line 4-4 in FIG.

FIG. 5 is an assembled perspective view of the zoom lens device including a first moving frame.

FIG. 6 is an assembled perspective view including a second moving frame of the zoom lens device.

FIG. 7 is an assembly perspective view of a finder section to which the lens shape of the camera according to the present invention is applied.

FIG. 8 is a front view of a concave lens to which the lens shape of the camera according to the present invention is applied.

9 is a sectional view taken along line 9-9 in FIG.

10 is a sectional view taken along line 10-10 in FIG.

FIG. 11 is a front view of a convex lens to which the lens shape of the camera according to the present invention is applied.

12 is a sectional view taken along line 12-12 in FIG.

13 is a sectional view taken along line 13-13 in FIG.

[Explanation of symbols]

 10 ... Camera integrated VTR 16 ... Zoom lens device 24 ... First moving frame 28 ... Second moving frame 32 ... Side cam barrel 200 ... Finder section 202 ... Finder body 210 ... Front moving frame 212 ... Rear moving frame 224, 226, 228 , 230 ... Lens 232 ... Spacing pin 228A, 230A ... Receiving part

Claims (1)

[Claims] 1. A plurality of columnar pins are formed in a corner of a rectangular lens in the optical axis direction of the lens, and a receiving portion composed of a flat portion is formed in a corner of the rectangular lens adjacent to the lens. Then
A lens shape of a camera, characterized in that the pin is brought into contact with a receiving portion of an adjacent lens to hold a lens interval at a predetermined interval.