JPH0328693B2 - - Google Patents

Description

[Detailed description of the invention]

(Technical Field of the Invention) The present invention relates to a speedlight film sensitivity information introduction device. (Background of the Invention) For example, a speedlight is equipped with a device that calculates and displays the combination of aperture and subject distance for the sensitivity of the film loaded in the camera.
As is well known, this calculation device uses the formula for calculating the guide number, i.e.

[Formula] (where, Sx: arbitrary film sensitivity, Sa: standard film sensitivity (ASA 100), A: aperture value, D: subject distance), calculates and displays the combination of the above aperture value and subject distance. It is something. Conventionally, this type of calculation device had the following drawbacks because the film sensitivity was set separately from the film sensitivity setting using the film sensitivity setting dial of a camera equipped with a photometric circuit. (a) The operation is complicated because the film sensitivity must be set separately on the computer and on the film sensitivity setting dial of the camera. (b) If the film sensitivity set on the computing device differs from that set on the camera's setting dial, an exposure error will occur if you set the aperture and subject distance according to the display on the computing device and take flash photography. (Object of the Invention) In view of the above drawbacks, an object of the present invention is to provide a speedlight film sensitivity information introduction device that introduces film sensitivity information set on the camera side in conjunction with the operation of attaching a speedlight to the camera. be. (Summary of the Invention) According to the present invention, an accessory shoe, a film sensitivity setting member, and a film sensitivity setting member disposed near the accessory shoe are disposed and are displaced according to the film sensitivity set by the film sensitivity setting member. A speedlight that can be used in a camera and has a signal member that is detachable from the accessory shoe; a holding position for holding the attachment member in a state where it is attached to the accessory shoe; a holding member that is movable between a holding release position and a holding release position that allows the member to be freely attached to and detached from the accessory shoe; a movable member for introducing film sensitivity information that is engageable with the signal member; a moving member that moves the holding member to the holding position; a biasing member that biases the movable member in a direction to engage the signal member in conjunction with the movement; and a biasing member that determines the position of the movable member when the mounting member is attached to the accessory shoe by setting the film sensitivity. a regulating member that regulates the movable member according to the movement of the holding member so as to separate the signal member in a direction opposite to the engagement direction from the position of the signal member when the limit film sensitivity is set by the member; A speedlight film sensitivity information introduction device is provided. The present invention having such a structure introduces the film sensitivity information into the speedlight side in conjunction with the operation of the holding member, and by providing the regulating member, the film sensitivity can be reliably maintained even when setting the film sensitivity at the limit. This is to be introduced. (Example) The present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram showing the arrangement of a film sensitivity information introduction device according to an embodiment of the present invention. A mounting member (mounting shoe) 1 is attached to the speedlight body 10 and an accessory shoe 14 provided around the rewind crank (not shown) of the camera 13.
A support 12 is provided between the support 1 and the support 1. Post 12
is normally rotatably supported by the speedlight (light emitting unit) main body 10. The introduction device 15 is arranged near the mounting member 11 of the support column 12. A film sensitivity setting dial 16 is provided so as to be rotatable around the accessory shoe 14. Next, an embodiment of the present invention will be described with reference to FIG. In the figure, the support column 12 is fixed to a fixing member 17. The distance scale cylinder 20 is a fixed member 17
The subject distance scale is engraved on its circumferential surface. The cylindrical selector cover 21 is fixed to the fixed member 17 and has a groove 21a corresponding to the movement area of the dimming selector 22. This dimming selector 22 is used to switch the sensitivity of the light intensity integrating circuit (not shown as it is a well-known circuit) of the automatic dimming speedlight. belongs to. This dimming selector 22 can be moved both clockwise and counterclockwise in the figure. A cylindrical aperture value/film sensitivity scale cylinder 23 is rotatably supported by a fixed member 17. This movable member barrel 2
An aperture value scale is provided on the upper part of the circumferential surface of the lens 3, and a film sensitivity scale is provided on the lower part. A cylindrical cover 25 covers the tube 23 and has a display window 25a for displaying the sensitivity of the film loaded in the camera and the usable aperture value, and is itself fixed to the column 12. As is well known, these scales are graduated based on the speedlight's unique guide number so as to satisfy the above guide number calculation formula. Note that each scale is a logarithmic scale, and the aperture value scale and subject distance scale may be replaced. The cylindrical rotating member 26 rotates together with a shaft 27 supported by the fixed member 17. The interlocking member 28 connects the scale cylinder 23 and the rotating member 26 so as to rotate together, and the tip 28a engages with the protrusion 16a of the film sensitivity setting dial. The mainspring spring 29 has a pin 30 fixed to the fixed member 17 and a pin 3 fixed to the rotating member 26.
1, and urges the rotating member 26 clockwise over its entire rotation range. (The pin 30 is not shown directly fixed to the fixed member 17 for convenience of illustration.) The cylindrical show cover 32 covers the rotating member 26 and is rotatably supported by the fixed member 17 (in this supported state (not shown). An engaging protrusion 32a on the inner periphery of the shoe cover 32 engages with the interlocking member 28 and is applied with a clockwise biasing force by the senmai spring 29.
is provided. Also, this show cover 3
The height of the notch 2 is determined so as to serve as a cover for the mounting member 11, and the notch 32b serves as a mounting opening for mounting the mounting member 11 on the accessory shoe 14. As is well known, the film sensitivity setting dial 16, which is semi-fixedly locked by a locking member 33, changes the resistance value of a variable resistor for introducing the film sensitivity of a photometric circuit (not shown) by its rotation. The locking member 33 prevents the dial 16 from rotating inadvertently. Of course, if the locking member 33 is released, the dial 16 will rotate. A signal protrusion 16a protruding from a predetermined position of the dial 16 is connected to the tip 2 of the interlocking member 28 when the mounting member 11 is attached to the accessory shoe 14.
It is located within the rotational orbit of 8a and does not interfere with the setting member 32. Even after the attachment member 11 is attached to the accessory shoe 14 and the shoe cover 32 is rotated to prevent them from coming off as described later, the connection between the signal protrusion 16a and the tip 28a is ensured. Note that the protruding position of the signal protrusion 16a is determined by the film sensitivity set by the film sensitivity setting dial 16 being linked with the tip 28a, so that the display window 2
It goes without saying that it is determined to appear in 5a. Note that the number 24 in the figure is omitted for convenience. Now, the operation will be explained with reference to FIGS. 3a and 3b, which are sectional views taken along the line A-A' in FIG. First, the film sensitivity setting dial 16 is rotated to match the scale corresponding to the sensitivity of the film loaded in the camera with the index 34. Next, show
The cover 32 is rotated counterclockwise to reach the set position so that the mounting opening 11a of the mounting member 11 and the notch 32b are opposed to each other. At this time, the engaging protrusion 3
2a and the interlocking member 28, the rotating member 2
6. The scale cylinder 23 is rotated counterclockwise, and the mainspring spring 29 is compressed. Also, the aperture value and film sensitivity scales are in the predetermined starting state (second
condition shown). In this state, the attachment member 11 is attached to the accessory shoe 14. At this time, the positional relationship among the tip 28a of the interlocking member 28, the shoe cover 32, and the protrusion 16a is shown in FIG. 3a. Here, when the shoot cover 32 is in the set position, the tip 28a of the interlocking member is connected to the film sensitivity setting dial 16.
The engaging protrusion 32a is positioned so as to be slightly further away in the clockwise direction from the position of the signal protrusion 16a when the film sensitivity is set to the lowest film sensitivity (for example, ASA12). This is to ensure interlocking of the tip 28a and the signal protrusion 16a when the film sensitivity is set to the lowest. Then, rotate the show cover 32 clockwise. As a result, the rotating member 26, the interlocking member 28, and the scale cylinder 23, which are biased clockwise by the spiral spring 29, rotate clockwise following the rotation of the engagement protrusion 32a. And interlocking member 2
When the tip 28a of 8 engages with the signal protrusion 16a,
Since the dial 16 is locked by the locking member 33, the interlocking member 28 stops rotating at the time of this engagement. Therefore, the rotating member 26 and the scale tube 2
3 also stops rotating, and the film sensitivity set by the dial appears on the display window 25a. Thereafter, even if the shoe cover 32 is rotated to the set end position, this condition does not change. The combination of aperture value and subject distance in this state is an appropriate combination for the film sensitivity. At this time, the tip 2 of the interlocking member
8a, shoe cover 32 and signal protrusion 16a
The positional relationship is shown in FIG. 3b. In this state, the notch 32b of the shoe cover 32 closes the mounting opening 11a of the mounting member, so the mounting member 11 will not come off from the accessory shoe 14. Here, show cover 32
At the set end position, the tip 28 of the interlocking member
In order to ensure that a is engaged with the signal protrusion 16a when the film sensitivity setting dial 16 is set to the highest film sensitivity (for example, ASA3200), the engagement protrusion 32a is moved slightly in the counter-time direction than the signal protrusion 16a. They are located far apart. Thus, depending on the desired film sensitivity, the computing device operates automatically. According to the present invention as described above, it is possible to obtain a film sensitivity information introducing device that operates in conjunction with the operation of attaching a speedlight to a camera, and since there is no need to separately set the film sensitivity on the speedlight side, a calculation device, etc. suitable for Therefore, the time and effort required to introduce film sensitivity information can be saved, and the operation can be simplified. In addition, the film sensitivity setting member (setting dial 16) can be used to set the film sensitivity at its limit (for example,
This means that film sensitivity can be reliably introduced when setting up the ASA12 or ASA3200.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram showing the arrangement of a computing device according to an embodiment of the present invention, FIG. 2 is a detailed explanatory diagram of the present invention, and FIG. 3 is a sectional view taken along the line A-A' in FIG. Explanation of symbols of main parts, 14...Accessory shoe, 16...Film sensitivity setting dial (film sensitivity setting member), 16a...Dial 16
Signal protrusion (signal member), 11...Mounting member, 3
2... Show cover (holding member), 28a... Tip of interlocking member 28 (movable member for introducing film sensitivity information), 29... Spring spring (biasing member), 3
2a...An engaging protrusion (regulating member) provided on the inner periphery of the show cover 32.

Claims (1)

[Claims] 1. An accessory shoe, a film sensitivity setting member disposed near the accessory shoe,
A speedlight that can be used in a camera and includes a signal member that is provided on the film sensitivity setting member and that is displaced in accordance with the film sensitivity set by the film sensitivity setting member, wherein the speedlight is detachably attached to the accessory shoe. member; a holding member that is movable between a holding position for holding the mounting member in a state where it is attached to the accessory shoe and a holding release position that allows the mounting member to be freely attached to and detached from the accessory shoe; a movable member for introducing film sensitivity information that is engageable with the signal member; the movable member is always biased in a direction to engage with the signal member, and the movable member is moved in conjunction with the movement of the holding member to the holding position; a biasing member for engaging the movable member with the signal member; and a biasing member that controls the position of the movable member when the mounting member is attached to the accessory shoe by the signal when the film sensitivity setting member sets the film sensitivity at the limit. a regulating member that regulates the movable member according to movement of the holding member so as to separate the movable member from the position of the member in a direction opposite to the engagement direction against the urging force of the urging member; A speedlight film sensitivity information introduction device characterized by the following. 2. The biasing member stores energy in conjunction with the movement of the holding member from the holding position to the holding release position, and the multiple force causes the movable member to engage the signal member when the holding member moves in the opposite direction. A film sensitivity information introduction device for a speedlight according to claim 1, characterized in that: 3. The speedlight film sensitivity information introducing device according to claim 2, wherein the limit film sensitivity is the lowest film sensitivity that can be set by the film sensitivity setting member. 4. The regulating member is provided integrally with the holding member, and has a first position spaced apart in a direction opposite to the engagement direction from the position of the signal member when the film sensitivity setting member sets the lowest film sensitivity, and a first position spaced apart from the position of the signal member when the film sensitivity setting member sets the lowest film sensitivity; Introducing film sensitivity information of a speedlight according to claim 3, wherein the signal member is movable between a position spaced apart in the engagement direction from a position of the signal member when setting the sensitivity. Device.