JPH0590473U - Camera screen size changing device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To obtain a photography screen regulation adapter fixture that has extremely few components and therefore is less expensive to manufacture than conventional ones. [Structure] A main body for controlling a photographing screen size, a pair of engagement / disengagement portions 25, 26, 27, 29 supported by the main body so as to be capable of contacting / separating with respect to an edge portion of an aperture, and the pair of engagement / disengagement portions. A biasing means 32 for biasing in the engagement direction with the aperture.
And a pair of attachment / detachment operating portions 27b and 29b respectively provided on a part of the pair of engagement / disengagement portions, and the adapter attachment slides in the same direction as the pair of engagement / disengagement portions of the photographing screen regulation adapter 22. A pair of possible slide operation bodies, a casing for accommodating the pair of slide operation bodies and restricting the slide operation range thereof, and a projection hole provided in each of the pair of slide bodies and provided outside the projection hole provided in the casing. And a detachable attachment / detachment portion 42 for attaching / detaching to / from the attachment / detachment operation portion of the pair of engagement / disengagement portions of the photographing screen regulation adapter.

Description

[Detailed description of the device]

[0001]

【Technical field】

 The present invention relates to a photographing screen size changing device for a camera, which includes a photographing screen regulation adapter for changing a photographing screen size and an adapter mounting tool for attaching and detaching the adapter.

[0002]

[Prior art and its problems]

 For panoramic shooting with a still camera, a certain width above and below the film surface is shielded by a certain amount of light, and shooting is performed on a screen that is horizontally longer than the normal shooting screen size (24 mm x 36 mm). It is printed on landscape paper. There is a camera dedicated to panorama shooting, but this is used only for panoramic shooting, and if you want to shoot with a normal shooting screen size, you have to carry it with a normal camera and it is inconvenient. Met.

Therefore, in recent years, a photographing screen regulation adapter (hereinafter referred to as an adapter) has been devised that can be fixed to an aperture of a normal camera and shields the upper and lower sides of the aperture with a constant width for panoramic photography. ing. This adapter is usually attached to and detached from the camera using an adapter mount.

By the way, the conventional adapter fixture is made up of a large number of components even though it is only a tool for attaching / detaching the adapter to / from the camera, and therefore a large production cost is spent. ..

[0005]

[The purpose of the device]

 The present invention has been made in view of the above-mentioned conventional problems, and is a photographing screen regulation adapter for changing a photographing screen size and a conventional adapter mounting tool used in the photographing screen regulation adapter and set. The objective is to obtain a shooting screen regulation adapter fixture that has the same functions as the above, but has a smaller number of components than conventional adapter fixtures, and thus is less expensive to manufacture than conventional ones.

[0006]

[Outline of the device]

 The photographing screen size changing device of the camera of the present invention which achieves the above object is attachable to and detachable from the aperture of the camera, and the photographing screen regulation adapter that shields a part of the aperture at the time of mounting and this photographing screen regulation adapter. In the device for changing the shooting screen size of a camera equipped with an adapter fitting for attaching and detaching to and from the camera, the shooting screen restriction adapter can be brought into contact with and separated from the body that restricts the shooting screen size and the edge of the aperture. And a pair of engagement / disengagement portions supported by the main body, biasing means for biasing the pair of engagement / disengagement portions in the engagement direction with the aperture, and a part of the pair of engagement / disengagement portions. The adapter attachment includes a pair of slide operation bodies that can slide in the same direction as the pair of engagement / disengagement portions of the photographing screen regulation adapter, and the pair of slide operation bodies. In addition, the casing that regulates the sliding operation range and the attachment / detachment of the pair of engagement / disengagement portions of the photographing screen regulation adapter, which are provided in the pair of slide bodies and project to the outside through the projection holes provided in the casing, respectively. It is characterized in that the operation part is provided with a detachable detachable part.

[0007]

【Example】

 The present invention will be described below with reference to illustrated embodiments. As shown in FIG. 10, a taking lens 13 and a back cover 15 which can be opened and closed are provided in front of and behind the camera body 12 of the camera 11. On the left and right sides of the camera body 12, there are formed a cartridge chamber 17 and a spool chamber 19 for winding the film F sent from the cartridge chamber 17 on a spool. An aperture 20 composed of upper and lower aperture frames 18 and left and right aperture frames 21 is provided in the middle of the cartridge chamber 17 and the spool chamber 19.

FIGS. 11 to 13 show an adapter 22 (photographing screen restriction adapter) according to the present invention. This adapter 22 has two shading plates 23 which should be located above and below the aperture 20, and these shading plates 23 are mutually connected by a frame member 25 (engaging part) and a frame member 26 (engaging part). It is positioned so that it has a constant width interval.

Sliding support members 31 each having a U-shaped cross section are attached to the upper surfaces of the two light-shielding plates 23, and the sliding portions 27 that are a part of the frame member 25 and the frame member 26. The sliding portions 29, which are a part, are inserted into the sliding support members 31 and are supported so as to be slidable in the left and right directions. The sliding portions 27, 29 are respectively engaged at their both ends with a tip end portion 27a, 29a of the compression spring 32 (biasing means) located in the opening of the sliding support member 31. As a result, it is normally spread to the left and right as shown in FIGS.

The frame members 25 and 26 are bent so as to be offset by a predetermined amount with respect to the sliding portions 27 and 29, so that a gap 33 is formed between the frame members 25 and 26 and the light shielding plate 23. As shown in FIGS. 12 and 13, each of the two light shielding plates 23 is provided with two horizontally long openings 23a, and the horizontally long openings 23a are provided in the sliding portions 27 and 29. The opening 27b (attachment / detachment operation portion) and the opening 29b (attachment / detachment operation portion) correspond to each other.

1 to 4 show an embodiment of an adapter fitting 40 according to the present invention. The adapter attachments 40 are a pair of operation members 41 (slide operation bodies) having the same shape, and a pair of engagement pins 42 provided on each of the operation members 41 and engageable with the openings 27b and 29b of the adapter 22. (Attachment / detachment part), a compression spring 43 for urging the pair of operating members 41 in directions away from each other, an upper casing member 45 (casing), and a lower casing member 46 (casing), forming a point-symbol shape. is doing.

The operation member 41 has an operation button portion 41a, a guide arm portion 41b, a spring support protrusion 41c, and a pair of engagement pins 42. As shown in FIG. 1, the pair of operation members 41 are arranged such that the operation button portions 41a thereof face outward and the respective engagement pins 42 extend downward from the corresponding elongated holes 46a formed in the lower casing member 46 in the figure. It is made to protrude (see Fig. 4). Further, the pair of operating members 41 are provided with spring supporting protrusions 41c respectively provided at both ends of the compression spring 43, and are biased by the compression springs 43 in directions away from each other.

The lower casing member 46 has one locking claw 46b at each of the four corners. These locking claws 46b are for connecting the lower casing member 46 and the upper casing member 45, and are engaged with the corresponding locking grooves 45a provided in the upper casing member 45, respectively.

The upper casing member 45 is provided with a pair of openings 45b for protruding the pair of operation button portions 41a from the casing when connected to the lower casing member 46. Further, the upper casing member 45 is provided with a guide portion 45c. When the upper casing member 45 and the lower casing member 46 are connected to each other, the guide portion 45c has a pair of operation members 41 provided inside the casing in the direction of arrow A shown in FIG. The guide arm portion 41b of the operation member 41 is guided so as to slide in the same direction as the frame members 25 and 26 of FIG.

The engagement pin 42 provided on each of the pair of operating members 41 is an adapter that is in a free state in a free state after the adapter attachment 40 shown in FIGS. 3 and 4 is assembled. It has a space | interval which can be inserted in each of the openings 27b and 29b of 22.

The adapter 22 and the adapter mounting tool 40 having the above-described configurations can be used as follows. First, the adapter fixture 40 is lightly gripped and the engagement pins 42 are inserted into the openings 27b and 29b, respectively (FIG. 6).

From this state, the pair of operation button portions 41a are sandwiched by the fingers from both sides, and the pair of operation button portions 41a are pushed toward the inside of the casing against the compression spring 43 (FIG. 7).

In this state, the back cover 15 of the camera 11 is left open, and the adapter mounting tool 40 is appropriately moved to engage the gaps 33 formed on the left and right sides of the adapter 22 with the aperture frame 21 (FIG. 8). ). When the force pushing the pair of operation button portions 41a is released, the adapter 22 is fixed to the aperture frame 21 as shown in FIG. After confirming this fixing, the engaging pin 42 of the adapter mounting tool 40 may be removed from the openings 27b and 29b of the adapter 22.

When the adapter 22 is detached from the aperture frame 21 after the panoramic photography is completed, the adapter attachment 40 can be easily detached from the aperture frame 21 by performing an operation opposite to that at the time of attachment.

In the above-mentioned embodiment, the upper casing member 45 and the lower casing member 46 are composed of separate members, but for example, as shown in FIG. The integrated casing member 47 may be applied as the casing of the above embodiment.

The casing member 47 is made of a synthetic resin material or the like, and a connecting portion 48 connecting the lower casing portion 46 'and the upper casing portion 45' is provided so as to be bendable. Therefore, the lower casing portion 46 'is movable with respect to the upper casing portion 45' about the connecting portion 48 as an axis in the direction of arrow B shown in the drawing. Further, the lower casing portion 46 'is provided with a pair of locking claws 46b (only one of which is shown in the drawing) on the side opposite to the connecting portion 48, and the upper casing portion 45' has these engagement pawls 46b. A locking groove 45a corresponding to the stop claw 46b is provided. Therefore, when connecting the upper casing part 45 'and the lower casing part 46', the lower casing part 46 'is moved in the direction of arrow B shown in FIG. The engaging groove 45a may be engaged.

[0022]

[Effect of the device]

 As described above, according to the photographing screen size changing device for a camera of the present invention, it is possible to reduce the number of component parts of the adapter mounting tool as compared with the conventional adapter mounting tool, such as eliminating the screw for assembling the casing. This can reduce production costs and assembly time.

[Brief description of drawings]

FIG. 1 is an exploded perspective external view of an adapter attachment according to an embodiment of the present invention.

FIG. 2 is a perspective external view of an upper casing member in the embodiment.

FIG. 3 is a perspective external view of an adapter mounting tool in the embodiment.

FIG. 4 is a perspective external view of the adapter fixture viewed from an angle different from FIG.

FIG. 5 is a perspective external view of the casing showing another embodiment of the casing in the same embodiment.

FIG. 6, FIG. 7, FIG. 8, and FIG. 9 are views showing a situation in which the photographing screen regulation adapter is attached to and detached from the aperture frame of the camera by using the adapter attachment of the embodiment.

FIG. 10 is a perspective external view showing a state in which the photographing screen regulation adapter is attached to the aperture frame of the camera.

FIG. 11 is a perspective external view of a photographing screen regulation adapter according to the present invention.

FIG. 12 is a perspective external view of the same photographing screen regulation adapter as seen from an angle different from that in FIG.

FIG. 13 is a cross-sectional view showing a state in which the photographing screen regulation adapter is attached to the aperture frame.

[Explanation of symbols]

22 Photographic screen regulation adapter 23 Light-shielding plate 25, 26 Frame member (engagement part) 27, 29 Sliding part (engagement part) 31 Sliding support member 32 Compression spring (biasing means) 27b, 29b Opening (attachment / detachment operation part) ) 40 Adapter mounting tool 41 Operation member (slide operation body) 41a Operation button part 41b Guide arm part 41c Spring support protrusion 42 Engagement pin (detachable part) 43 Compression spring 45 Upper casing member (casing, upper casing part) 45 'Upper part Casing part (casing) 45a Locking groove (locking part) 45b Opening 45c Guide part 46 Lower casing member (casing, lower casing part) 46a Long hole 46b Engaging claw 46 'Lower casing part (casing) 47 Casing member (casing) ) 48 connection

Claims (3)

[Scope of utility model registration request] 1. A camera provided with a photographing screen regulation adapter which is attachable to and detachable from an aperture of the camera and shields a part of the aperture when the camera is attached, and an adapter mounting tool for attaching and detaching the photographing screen regulation adapter to the aperture. In the photographing screen size changing device, the photographing screen regulation adapter includes a main body that regulates the photographing screen size; a pair of engagement / disengagement portions supported by the main body so that they can be brought into contact with / separated from an edge portion of an aperture; The adapter mounting tool includes the urging means for urging the engagement / disengagement portion in the engagement direction with the aperture; and the attachment / detachment operation portion provided on a part of the pair of engagement / disengagement portions. A pair of slide operating bodies that can slide in the same direction as the pair of engaging / disengaging portions of the regulation adapter; the pair of slide operating bodies are housed, and the slide operating range is regulated. And a detachable portion that is provided on each of the pair of slide bodies and that protrudes outward from a projecting hole provided in the casing and that can be attached / detached to / from the attachment / detachment operation portion of the pair of engagement / disengagement portions of the photographing screen regulation adapter. And a shooting screen size changing device for a camera. 2. The casing according to claim 1, wherein the casing has an upper casing portion and a lower casing portion, and a plurality of locking claws are provided on one of the upper casing portion and the lower casing portion, and the other is provided on the other. Locking portions corresponding to the plurality of locking claws are provided, and both of the upper casing part and the lower casing part are joined by the engagement of the locking claws and the locking parts, and a photographing screen of a camera Resize device. 3. The photographing screen size changing device for a camera according to claim 2, wherein the upper casing part and the lower casing part are integrally formed.