JP3361353B2 - Support structure for camera's panoramic light shield - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera in which a lens barrel is formed integrally with a camera body, and the upper and lower portions of an aperture are appropriately covered with light-shielding plates. The present invention relates to a support structure for the light-shielding plate suitable for a camera capable of performing panoramic photographing. 2. Description of the Related Art In order to make it easy for anyone to enjoy taking pictures, the focal length of a taking lens can be set to a long focal length (tele) or a short focal length (telephoto) without changing lenses. 2. Description of the Related Art Cameras equipped with a variable focus device such as a so-called focus switching device capable of switching to a wide-angle mode and a zoom device capable of continuously changing a focal length have become widespread. Some popular cameras of this type have a panoramic photographing function so as to be suitable for photographing a distant view such as a mountain photograph, or when a wide area is desired to be contained on one screen. [0003] As a structure for panoramic photography, a rotatable light-shielding plate is provided in front of the aperture, and at the time of panoramic photography, the light-shielding plate is rotated to enter the optical path so as to cover the upper and lower portions of the aperture. There is. When a conventional light-shielding plate of this type is mounted, the light-shielding plate is rotatably assembled from the front of the camera body to the front upper and lower portions of the aperture portion, and a lens barrel such as a fixed lens barrel is mounted from the front. [0004] In order to fully disseminate a camera incorporating the above-described various devices, it is necessary to provide the camera at a low cost. Therefore, a camera in which a lens barrel and a camera body are integrally formed of a synthetic resin or the like has been developed. However, if the lens barrel is formed integrally with the camera body, in order to incorporate the light-shielding plate from the front of the camera, a through-hole for inserting the light-shielding plate into the lens barrel may be formed, Since the through-hole must be closed after assembling the light-shielding plate for light-shielding in the cylinder, the structure becomes complicated, and cost reduction cannot be effectively achieved. In view of the above, the present invention provides a support structure for a panoramic photographing light shielding plate of a camera which can easily incorporate a panoramic photographing light shielding plate, even if the camera body and the lens barrel are integrally molded. It is intended to provide. As a technical means for achieving the above object, a support structure for a light shielding plate for panoramic photographing of a camera according to the present invention comprises a lens barrel and a camera body integrally formed. In the supporting structure of the light shielding plate rotatably incorporated in front of the aperture portion of the camera with the panoramic photographing function, the camera is attached to and detached from the rear surface of the camera body at the peripheral edge of the rear end of the lens barrel. The light shielding plate is freely and rotatably provided, and an aperture frame forming an aperture is detachably provided on a camera body from behind the camera, and the aperture frame supports the light shielding plate. When a light-shielding plate for panoramic photographing is incorporated in the camera, the operation is performed from behind the camera body. That is,
On the back of the camera body, a light-shielding plate is installed at the upper and lower portions of the rear end of the lens barrel, and an aperture frame is attached from the rear, so that the light-shielding plate and the aperture frame are attached to the rear of the camera body and the lens barrel. . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A support structure of a light-shielding plate for panoramic photographing of a camera according to the present invention will be specifically described below based on an embodiment shown in the drawings. FIG. 1 is a perspective view schematically showing the rear surface of the camera body 1. A fixed lens barrel 2 is provided at the center of the camera body 1 and is integrally molded with the camera body 1 using a synthetic resin or the like. . With the fixed lens barrel 2 interposed therebetween, a patrone chamber 3 in which a patrone containing a film is loaded and a spool chamber 4 in which a spool (not shown) for sequentially winding the film is supported are provided. A battery chamber 5 is provided on the side of 3. The interior of the fixed lens barrel 2 communicates with the rear of the camera body 1, and the rear part of the camera body 1 which communicates with the fixed lens barrel 2 is formed in a substantially rectangular frame shape to form an aperture portion. The inner peripheral surface of the fixed lens barrel 2 is
2a fits. A helicoid 2b is formed on an inner peripheral surface 2a extending from the front end of the fixed barrel 2 to an appropriate position at the rear, and an outer periphery of a movable barrel holding a photographic lens (not shown) housed in the fixed barrel 2. The helicoid formed on the surface meshes with the helicoid 2b, and the movable lens barrel is rotated so that the movable lens barrel advances and retreats in the optical axis direction. At the rear end of the inner peripheral surface 2a of the fixed lens barrel 2, flank surfaces 6 are formed at portions corresponding to the four rectangular corners of the aperture portion. The flank 6 is formed as a vertical surface parallel to the optical axis of the photographing lens (not shown), and is formed outside the inner peripheral surface 2a of the fixed lens barrel 2. A frame receiving surface 7 is formed in a plane in the optical axis direction at a position slightly in front of the rear end of the rear end of the fixed lens barrel 2 facing the camera. . As shown in FIGS. 1 and 2, a substantially trapezoidal through hole 7a is formed in the upper and lower portions of the frame receiving surface 7 formed on the spool chamber 4 side, and the camera body is inserted through the through hole 7a. The rear of 1 and the side of the fixed lens barrel 2 communicate with each other. Notches 7b are formed at the upper and lower ends of the frame receiving surface 7 on the spool chamber 4 side, and the through holes 7a and the inner rear portion of the fixed lens barrel 2 communicate with each other through the notches 7b. . Further, a cutout 7c for a bearing is formed on the side of the through hole 7a opposite to the cutout 7b. On the other hand, in the upper and lower portions of the frame receiving surface 7 on the patrone chamber 3 side, notches (not shown) are formed to have an appropriate length from the inner peripheral surface 2a of the fixed lens barrel 2. As shown in FIG. 1, light-shielding plates 10 and 11 for panoramic photography are provided at the upper and lower ends of the aperture portion. The light-shielding plates 10 and 11 appropriately cover the upper and lower portions of the aperture portion during panoramic photographing and prevent the upper and lower portions of the film from being exposed, and are retracted from the aperture portion during normal photographing. Bearing pins 10a and 11a project outward from one ends of the light shielding plates 10 and 11, respectively. At the other end, the input plate 10 is sandwiched between the cuts 10b and 11b.
c, 11c are formed, and bearing pins 10d, 11d project outward from the input plate portions 10c, 11c. Then, with the light shielding plates 10 and 11 inserted from behind the camera body 1,
The bearing pins 10a and 11a are accommodated in the notches (not shown) on the patrone chamber 3 side, and the bearing pins 10d and 11d are
The input plate portions 10c and 11c are accommodated in the through-hole 7a while being accommodated in the through-hole 7c. As shown in FIG. 1, aperture frames 20, 21 are placed behind the light-shielding plates 10, 11, respectively. These aperture frames 20, 21 are divided into right and left, and are formed of a substantially rectangular plate material. This aperture frame 2
Reference numerals 0 and 21 are placed on the frame receiving surface 7 so that the inner edges of the aperture frames 20 and 21 coincide with the flank 6, so that the inner edges of the aperture frames 20 and 21 are It is located inside the inner peripheral surface 2a of the fixed lens barrel 2. As shown in FIG. 3, bearing projections 22 and 23 are formed on the upper and lower portions of the front side surfaces of the aperture frames 20 and 21, respectively.
When the aperture frames 20 and 21 are put on, the notches 7c formed on the frame receiving surface 7 by the bearing projections 22 and 23 are formed.
The bearing projections 22 and 23 support the bearing pins 10a, 10d, 11a and 11d of the light shielding plates 10 and 11, respectively. A film rail 24 is provided on the upper and lower portions of the aperture portion so as to be stretched over the aperture frames 20, 21 as shown in FIG. 1 and adhered to the aperture portion. The film loaded in the patrone chamber 3 is drawn out of the patrone and guided to the spool chamber 4 along the film rail 24. As shown in FIG. 4, a front end of a driving rod 31 of a light-shielding plate driving mechanism is in contact with front side surfaces of the input plate portions 10c and 11c of the light-shielding plates 10 and 11. The schematic structure of the light shielding plate driving mechanism will be described with reference to FIG. FIG. 5 is a perspective view showing the driving mechanism from the front of the camera, and shows the driving rod.
Numerals 31 are formed on the upper and lower portions of the upper drive plate 32 and the lower drive plate 33, respectively, extending rearward. The upper drive plate 32 and the lower drive plate 33 are rotatably supported on the panoramic base plate 30 around an axis parallel to a direction orthogonal to the optical axis, and each has teeth 32a, 33a formed in the center. Formed into a sector gear. And each tooth 32
When one of the drive plates 32 and 33 rotates, the other rotates. An arm 32b extending forward of the camera is formed at a part of the upper driving plate 32, and an input provided on a switching plate 34 rotatably supported coaxially with a rotation axis of the upper driving plate 32. A pulling spring 35 composed of a tension coil spring is stretched over the arm 34a and the arm 32b,
The arm 32b and the input arm 34a are attracted to each other by receiving the restoring force of the pulling spring 35. As shown in FIGS. 1 and 5, a return spring 36 composed of a torsion coil spring is wound around the bearing pins 10a and 11a of the light shielding plates 10 and 11 on the patrone chamber 3 side. The light-shielding plates 10 and 11 return from the panoramic photographing position to the normal photographing position by the restoring force. On the other hand, as shown in FIG. 5, a switching knob 37 is provided at an appropriate position of the camera body 1 so as to be slidable in a direction parallel to the direction orthogonal to the optical axis. Is connected to the switching lever 38. A restoring force of a return spring 39 composed of a tension coil spring is applied to the switching lever 38, and the switching knob 37 slides toward the normal photographing mode side indicated by an arrow N in FIG. A switching arm 38a is formed at the lower end of the switching lever 38 so as to be directed forward. The tip of the switching arm 38a is connected to the input arm of the exchange lever 40.
It is linked to 40a in a detachable manner. The exchange lever 40 is rotatably supported around a direction parallel to the optical axis.
Output arm extended in the direction opposite to the input arm 40a
40 b and the input arm 34 a of the switching plate 34 are connected via a wire 41. Note that the switching knob 37 is set to the arrow mark P in FIG.
Slide in the direction to enter panorama shooting mode.
Slide in the direction to switch to the normal shooting mode. With respect to the embodiment of the support structure of the light shielding plate for panoramic photography of the camera according to the present invention constituted as described above,
The operation will be described below. A camera body 1 in which a fixed lens barrel 2 is integrally formed.
The light-shielding plates 10 and 11 for panoramic photography are incorporated in the aperture section. That is, the respective bearing pins 10 of the light shielding plates 10 and 11
A return spring 36 is wound around a and 11a, and the bearing pins 10a and 11a and the bearing pins 10d and 11d are positioned in the cutout 7c. In this state, the input plate portions 10c and 11c of the light shielding plates 10 and 11 are located in the through holes 7a of the frame receiving surface 7. Then, the film rails 24 are arranged on the upper and lower portions of the aperture portion and fastened by bonding or the like, and the left and right aperture frames 20 and 21 are put on the frame receiving surface 7 and set screws 20a
It is fixed to the frame receiving surface 7 by (as shown in FIG. 1). The aperture frames 20, 21 are formed in a substantially rectangular shape, and the inner edges thereof coincide with the flank 6, so that the aperture frames 20, 21 form a substantially rectangular aperture. When the aperture frames 20 and 21 are covered, the bearing projections 22 and 23 are inserted into the cutouts 7c formed in the frame receiving surface 7 as shown in FIG.
Then, the bearing pins 10a, 11a, 10d, 11d of the light shielding plates 10, 11 are supported. Next, the switching operation between the normal photographing mode and the panoramic photographing mode will be described. When the switching knob 37 is slid in the direction indicated by the arrow P in FIG. 5 from the normal shooting mode, the switching lever 38 also slides in the same direction, and the switching arm 38a pushes the input arm 40a of the exchange lever 40. Then, the exchange lever 40 rotates clockwise in FIG. 5, and the output arm 40b rotates in the same direction. The turning of the output arm 45b raises the input arm 34a of the switching plate 34, and the switching plate 34 rotates counterclockwise in FIG. When the input arm 34a is raised, the upper drive plate 32 connected to the input arm 34a via the pulling spring 35
The upper drive plate 32 is turned in the counterclockwise direction in FIG. For this reason, the upper drive plate 32
Of the light-shielding plate 10
10c, the light-shielding plate 10 turns clockwise in FIG. 5 against the restoring force of the return spring 36, and covers the upper part of the aperture as shown in FIG. Since the teeth 33a of the lower drive plate 33 mesh with the teeth 32a of the upper drive plate 32, the lower drive plate 32 is rotated by the above-described rotation of the upper drive plate 32.
33 rotates clockwise in FIG. Therefore, the drive rod 31 of the lower drive plate 33 turns in the same direction,
The light-shielding plate 11 is rotated counterclockwise in FIG.
11 will cover the lower part of the aperture.
Therefore, the upper and lower portions of the aperture are covered by the light shielding plates 10 and 11, and only the area corresponding to the panoramic shooting of the film is exposed. To switch from the panoramic photographing mode to the normal photographing mode, the switching knob 37 is slid in the direction of the arrow N in FIG. At this time, since the restoring force of the return spring 39 is received, the switching knob 37 slides smoothly. By the sliding of the switching knob 37, the switching lever 38 also slides in the same direction,
The switching arm 38a is separated from the input arm 40a of the exchange lever 40. Therefore, the exchange lever 40 is released from the restraint, and the wire rod 41 is attached to the output arm 40b of the exchange lever 40.
The switching plate 34 linked via the switch becomes free. Since this changeover plate 34 is biased drawn to the upper drive plate 32 by a spring 35 drawn, the switching plate 34 is free, and the upper switch plate 32, the teeth 32a and the upper switching plate 32 <br /> and the lower switch plate 33 which in tandem through the teeth 33a becomes free. Therefore, the light shielding plates 10 and 11 constrained by the upper switching plate 32 and the lower switching plate 33 become free, and receive the restoring force of the return spring 36 to switch from the position in the panoramic shooting state to the state of normal shooting. Rotate to a certain position. The upper and lower apertures are opened by the rotation of the light shielding plates 10 and 11, and the entire surface of the film is exposed. As described above, according to the support structure for the panoramic photographing light-shielding plate of the camera according to the present invention, the panoramic photographing light-shielding plate can be incorporated from the back side of the camera. The camera body and the lens barrel can be integrally molded of a synthetic resin or the like. Further, the structure can be made simpler than the structure in which the light shielding plate is incorporated from the front, and the assembling work can be easily performed. Therefore, it is possible to reduce the parts cost and the manufacturing cost of the camera, and to provide an inexpensive camera.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a support structure of a panoramic photographing light-shielding plate according to the present invention, and shows a state where a light-shielding plate for panoramic photographing and an aperture frame are attached to the back of the camera body. FIG. 3 is an exploded perspective view of the back surface of FIG. FIG. 2 is a rear view for explaining a portion that supports a light shielding plate and attaches an aperture frame. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, showing a state where an aperture frame is attached. FIG. 4 is a cross-sectional view taken along the line BB in FIG. 2, showing a state where an aperture frame is attached. FIG. 5 is a perspective view showing a schematic structure of a mechanism for driving a light shielding plate for panoramic photography. [Description of Signs] 1 Camera body 2 Fixed lens barrel 3 Patrone room 4 Spool room 5 Battery room 6 Flank surface 7 Frame receiving surface 7a Through hole 7b Notch portion 7c Cut portion 10, 11 Light shield plate 10a, 10d 11a, 11d Bearing pin 10b, 11b Cut 10c, 11c Input plate 20, 21 Aperture frame 22, 23 Bearing protrusion 24 Film rail 31 Drive rod 36 Return spring

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-61385 (JP, A) JP-A-3-84826 (JP, U) JP-A-4-1528 (JP, U) (58) Investigation Field (Int.Cl. ⁷ , DB name) G03B 17/02 G03B 17/28

Claims (1)

(1) In a supporting structure of a light shielding plate rotatably incorporated in front of an aperture part of a camera with a panoramic photographing function in which a lens barrel and a camera body are integrally molded, On the periphery of the rear end of the lens barrel and on the back of the camera body,
The light-shielding plate is detachably and rotatably provided on the back surface, and an aperture frame forming an aperture is detachably provided on the camera body from the rear of the camera, and the aperture frame supports the light-shielding plate. A support structure for a light shielding plate for panoramic photographing of a camera .