JPH0590471U - Camera screen size changing device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To obtain a shooting screen regulation adapter fixture that has a significantly smaller number of components than the conventional adapter fixture and is also cheap to manufacture. [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 the aperture, and the engagement / disengagement portion as an aperture. Urging means 32 for urging in the engaging direction of and the force operation parts 27b and 29 provided on a part of the engagement / disengagement part, respectively.
b, the adapter attachment is provided with a pair of slide operating bodies that are slidable in the same direction as the pair of engaging and disengaging portions of the photographing screen regulation adapter 22, and the above-mentioned photographing provided on the pair of slide operating bodies. An attachment / detachment portion 46 that can be engaged / disengaged with the force operation portion of the pair of engagement / disengagement portions of the screen regulation adapter, and a regulation member that regulates the slide range of the slide operation body are provided.

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 mount that has the same function as the above, but the number of components is extremely small compared to the conventional adapter mount, and therefore the manufacturing cost is lower than the conventional one. ..

[0006]

[Outline of the device]

 To achieve the above object, the photographing screen size changing device for a camera of the present invention can be attached to and detached from an aperture of the camera, and a 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 mount for attachment / detachment to / from the camera, the shooting screen restriction adapter allows the main body for controlling the shooting screen size and the edge of the aperture to come into contact with and separate from the main body. A pair of engagement / disengagement portions supported by the main body, an urging means for urging the pair of engagement / disengagement portions in the engagement direction with the aperture, and a force applied to each of the pair of engagement / disengagement portions. The adapter attachment includes a pair of slide operation bodies slidable in the same direction as the pair of engaging / disengaging portions of the photographing screen regulation adapter, and the pair of slides. An attachable / detachable portion that is provided on each of the construction bodies and that can be attached / detached to / from the force operation portion of the pair of engagement / disengagement portions of the photographing screen regulation adapter, and a regulation member that regulates the slide range of the pair of slide operation bodies. It is characterized by having.

[0007]

【Example】

 The present invention will be described below with reference to illustrated embodiments. As shown in FIG. 9, a taking lens 13 and a back cover 15 that 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, a cartridge chamber 17 and a spool chamber 19 for winding the film F sent from the cartridge chamber 17 on a spool are formed. An aperture 20 composed of upper and lower aperture frames 18 and left and right aperture frames 21 is provided between the cartridge chamber 17 and the spool chamber 19.

10 to 12 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. 11 and 12, two light shielding plates 23 are 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 (force applying operation section) and the opening 29b (force applying operation section) are provided.

1 to 4 show an embodiment of an adapter fitting 40 according to the present invention. The adapter fittings 40 are a pair of operating members 41 (slide operating bodies) having the same shape, and a pair of engaging members 46 provided on each of the operating members 41 and engageable with the openings 27b and 29b of the adapter 22. It is composed of a (attachment / detachment portion), a compression spring 48 for urging the pair of operation members 41 in directions away from each other, and a mounting screw 49 (regulating member), and has a point-symmetrical shape.

The operation member 41 has an operation button portion 42, an outer rail portion 43, an inner rail portion 44, and a pair of engagement pins 46. The outer rail portion 43 and the inner rail portion 44 are provided in parallel with each other with a predetermined distance therebetween. 1 shows the distance between the outer rail portion 43 and the inner rail portion 44, and b shows the width of the inner rail portion 44. The lengths of a and b are almost the same, and a is slightly longer than b.

The sliding surface 43a of the outer rail portion 43, which faces the inner rail portion 44, is formed in a concave shape in cross section. On the other hand, the sliding surface 44b of the inner rail portion 44, which is the surface opposite to the sliding surface 44a facing the outer rail portion 43, has a convex cross section. The sliding surface 43a and the sliding surface 44b are configured such that their shapes correspond to each other and are capable of sliding contact.

The outer rail portion 43 has a hole 43c penetrating from the outer surface 43b to the sliding surface 43a. The inner rail portion 44 is provided with a sliding groove 44c passing through the axis of the hole 43c. Further, the inner rail portion 44 has a compression spring storage groove 44d formed in a U-shaped cross section on the sliding surface 44a side. A spring support protrusion 47 is provided in the compression spring storage groove 44d. The spring support protrusion 47 projects from the side surface 41 a of the root portion of the inner rail portion 44.

Therefore, the pair of operation members 41 are inserted into the insertion sliding portion 45 formed by the space between the outer rail portion 43 and the inner rail portion 44 of the one operation member 41, and the inside of the other operation member 41. The rail portions 44 can be inserted and slid on each other. At that time, the sliding surface 43a of one operating member 41 slides in contact with the sliding surface 44b of the other operating member 41, and the sliding surface 44a of one operating member 41 slides on the other operating member 41. It slides in contact with the moving surface 44a.

Therefore, the adapter mounting member 40 having the above-described configuration fits the pair of operating members 41 to each other while inserting both ends of the compression spring 48 into the spring supporting protrusions 47 of the pair of operating members 41, and then the hole A mounting screw 49 is screwed and assembled to 43c. As shown in FIG. 1, this mounting screw 49 has a threaded screw portion 49a and an unthreaded pin portion 49b. The screw portion 49a is screwed into the inner surface of the hole 43c of the one operating member 41, and the pin portion 49b is fitted into the sliding groove 44c provided in the other operating member 41 after the assembling, and the sliding groove 44c. The sliding range of the pair of operating members 41 is regulated within the range of the length.

The engagement pin 46 provided on each of the pair of operation members 41 is an adapter which 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 configurations can be used as follows. First, the adapter fixture 40 is lightly gripped and the engagement pins 46 are inserted into the openings 27b and 29b, respectively (FIG. 5).

From this state, the pair of operation button portions 42 are sandwiched from both sides with fingers, and the pair of operation button portions 42 are pushed against the compression spring 48 (FIG. 6).

In this state, the back cover 15 of the camera 11 is left open, and the adapter attachment 40 is appropriately moved to engage the gaps 33 formed on the left and right of the adapter 22 with the aperture frame 21 (FIG. 7). ). Then, when the force pushing the pair of operation button portions 42 is released, the adapter 22 is fixed to the aperture frame 21 as shown in FIG. After confirming this fixing, the engagement pin 46 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 image capturing 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 place of the mounting screw 49 used as the restricting member in this embodiment, a locking means such as a click or a claw for preventing return is provided on the operating member 41, and the inner rail portion 44 of one operating member 41 is The number of components is further reduced by making the pair of operating members 41 so as not to come off from each other by the locking means working at a position where the other operating member 41 is inserted into the insertion sliding portion 45 by a predetermined amount. You can

[0023]

[Effect of the device]

 As described above, according to the photographing screen size changing device for a camera of the present invention, the photographing screen regulation adapter which is attachable to and detachable from the camera aperture and which shields a part of the aperture at the time of mounting, and the photographing screen regulation adapter are provided. In a camera screen size changing device equipped with an adapter attachment / detachment for attaching / detaching to / from the aperture, the number of components of this adapter attachment is smaller than that of the conventional adapter attachment, so the production cost and assembly time Can be reduced.

[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 an external view of an operation member viewed from a direction of an arrow A shown in FIG.

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.

FIGS. 5, 6, 7, and 8 are diagrams 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. 9 is a perspective external view showing a state in which a shooting screen regulation adapter is attached to an aperture frame of a camera.

FIG. 10 is a perspective external view of a photographing screen regulation adapter according to the present invention.

FIG. 11 is a perspective external view of the same photographing screen regulation adapter as seen from an angle different from that in FIG.

FIG. 12 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 (force operation part) ) 40 Adapter attachment tool 41 Operation member (slide operation body) 42 Operation button part 43 Outer rail part 44 Inner rail part 45 Insertion sliding part 46 Engagement pin (detachable part) 47 Spring support protrusion 48 Compression spring (biasing means) 49 Mounting screw (restriction member)

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 a camera and shields a part of the aperture when the camera is attached, and an adapter attachment 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 body that regulates the photographing screen size, a pair of engagement / disengagement portions that are supported by the body so that they can be brought into contact with and separated from the edge of the aperture, The adapter attachment includes an urging means for urging the engagement / disengagement portion in the engagement direction with the aperture, and a force-applying operation portion provided on a part of the pair of engagement / disengagement portions. A pair of slide operating bodies capable of sliding in the same direction as the pair of engaging / disengaging portions of the adapter, and the above-mentioned photographing screen regulation adapter provided on the pair of slide operating bodies, respectively. A pair of engagement with the adhesive strength operating part disengageably a detachable portion of the disengaging portion, a camera picture-format changing device being characterized in that a regulating member for regulating a sliding range of the pair of sliding operating body. 2. The camera according to claim 1, wherein the adapter attachment further comprises a biasing means for biasing the pair of slide operating bodies in the same direction as the biasing direction of the shooting screen regulating adapter by the biasing means. Shooting screen size changing device. 3. The photographing screen size changing device for a camera according to claim 1, wherein the pair of slide operating bodies have the same shape.