JPH08201896A - External battery mounting structure for camera - Google Patents

Abstract

(57) [Abstract] [Purpose] Attach an external battery to the camera easily and with good operability. [Structure] External batteries 38a, 38b are provided in the grip portion 26 of the grip device 22, and camera mounting holes 30a, 30b of the grip device 22 are inserted into the grip engaging / disengaging pins 18a, 18b of the camera body 4 to attach accessories. The clamp portion 32 is clamped on the pin 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an external battery mounting structure for a camera.

[0002]

2. Description of the Related Art In a medium format camera such as a 6 × 7 format camera using a 120 type or 220 type so-called Brownie film, the film winding is generally performed manually by a photographer, but the shutter control is performed electrically. Some models do so, and in this case a battery dedicated for shutter control is required. Also, when the exposure meter is provided, the power source of the exposure meter is shared by this shutter control dedicated battery. Since the shutter control consumes relatively little power, the shutter control battery has a relatively small capacity (for example, 4LR4).
4 type alkaline manganese battery and 4SR44 type silver oxide battery)
1 is used. The shutter control dedicated battery is detachably housed in the battery chamber inside the camera.

[0003]

By the way, when the battery for shutter control of a medium format camera such as a 6 × 7 format is a thin type battery called 4LR44 type or 4SR44 type as mentioned above, this battery is relatively small. Since the capacity is small, there is a problem that the life of the battery is shortened, for example, when a long exposure is frequently performed with a valve shutter. Also, since this battery has poor temperature characteristics at low temperatures, when using it in cold regions, take out the battery from the camera, put the battery case containing the battery in the photographer's pocket, etc. Was there. However, since the battery case accommodating the battery in this way is connected to the battery compartment on the camera side via a long cord, the handling of the cord becomes complicated, which may be an obstacle to photographing. The present invention has been devised in view of the above circumstances, and an object of the present invention is not to cause deterioration in battery performance when long-time exposure is frequently performed, and even when used in cold regions or the like. Another object of the present invention is to provide an external battery mounting structure for a camera that can eliminate the complexity of handling the cord member.

[0004]

To achieve the above object, the present invention comprises a grip mounting member for removably mounting a grip device for holding a camera body, and a battery chamber for accommodating a battery dedicated to shutter control. An external battery mounting structure for supplying electric energy of an external battery different from the battery to the camera, the structure being formed in a grip portion for holding the camera body of a grip device mounted on the grip mounting member. And an external battery chamber for storing an external battery having a larger capacity than the shutter control dedicated battery, a cord member electrically connected to the external battery stored in the external battery chamber, and an end of the cord member. And is detachably connected to the camera body side to supply electric energy of the external battery to the camera body side. It is characterized in that a connector portion.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view showing an external battery mounting structure of a camera according to the present invention, FIG. 2 is a perspective view showing a camera to which an external battery is mounted, and FIG. 3 is a grip device mounted on the camera shown in FIG. It is a perspective view. As shown in FIGS. 1 and 2, 2 is a 6 × 7 format camera using 120 type or 220 type Brownie film (hereinafter,
A camera body, 4 is a camera body, 6 is a lens mount, 8 is a lens barrel, and 10 is a viewfinder. Film winding of the camera 2 is performed manually, and shutter control is electrically performed by a shutter control dedicated battery. Further, at the bottom of the lens mount 6 in which the lens barrel 8 is mounted, a battery chamber 12 for accommodating a shutter control dedicated battery (4LR44 type alkaline manganese battery or 4SR44 type silver oxide battery) is provided, and the battery chamber 12 has a battery cover. It is opened and closed by 14. On the side surface of the lens mount 6 near the battery chamber 12,
An external power supply socket 16 that is electrically connected to the inside of the battery chamber 12 is formed. When the finder 10 of the camera 2 has a built-in exposure meter, this exposure meter is also shared by the shutter control dedicated battery. Grip engaging / disengaging pins 18a and 18b are attached to the upper and lower sides of the front surface 4a of the camera body 4 on both sides of the lens barrel 8. The grip engaging / disengaging pins 18a and 18b are provided on the shaft portion 18.
c, 18d and heads 18e, 18f formed to have a diameter larger than that of the shafts 18c, 18d.

Also, the grip engaging / disengaging pins 18a, 1
On the side surface of the lens mount 6 where the 8b is located, an accessory mounting pin 20 is provided so as to project outward at a position between the grip engaging / disengaging pins 18a and 18b. Also, 2
Reference numeral 2 denotes a grip device for enhancing the holdability of the camera 2, and includes a bracket 24 for detachably attaching to the camera body 4 side, a grip portion 26 for a photographer to hold the camera body 4, and a bracket 24. It is composed of grip belts 28a and 28b for fixing the grip portion 26. Camera mounting holes 30a and 30b to be inserted into the grip engaging / disengaging pins 18a and 18b are formed in the upper and lower portions of the bracket 24, respectively.
A clamp portion 32 and a clamp knob 34, which are clamped to the accessory mounting pin 20, are mounted between 0a and 30b. The camera mounting holes 30a and 30b are formed in the shape of an elongated hole in the vertical direction, and the camera mounting holes 30a and 30b
Guide holes 36a and 36b corresponding to the sizes of the camera mounting holes 30a and 30b and groove portions 36c and 36d are formed in communication with each other through a spacer member (not shown) on the back side of b. The groove portions 36c and 36d are the camera mounting holes 3
The width is slightly smaller than 0a and 30b.
The camera mounting holes 30a and 30b are formed in such a size that the heads 18e and 18f of the grip engaging / disengaging pins 18a and 18b can be inserted, and the groove portions 36c and 36d are the shafts of the grip engaging / disengaging pins 18a and 18b. The portions 18c and 18d are formed to have a movable width. Camera mounting holes 30a, 30
The positions of b and the clamp part 32 are different from those of the camera body 4 respectively.
It is formed so as to correspond to the positions of the grip engaging / disengaging pins 18a, 18b and the accessory mounting pin 20 provided on the.

An external battery chamber 40 for accommodating two lithium batteries (CR123A) 38a, 38b is formed in the grip portion 26, and a lithium battery 38a, 38b is accommodated by opening and closing a battery lid 42 at the bottom. , Is taken out. Lithium batteries (CR123A) 38a, 38b
Is, for example, 4LR44 type alkaline manganese battery or 4SR
It has a large capacity and is excellent in low temperature characteristics as compared with a shutter control dedicated battery housed in the battery chamber 12 such as a 44 type silver oxide battery. A cord member 44 electrically connected to the stored lithium batteries 38a and 38b is attached to the external battery chamber 40.
A connector portion 46 connected to the external power supply socket 16 on the camera 2 side is attached to the front end portion of the.

Next, the operation will be described. The grip device 22 in which the lithium batteries (CR123A) 38a and 38b are housed in the external battery chamber 40 in the grip portion 26 during long-time exposure with a valve shutter or when photographing in a cold region or the like.
Is mounted on the camera 2 side as shown in FIG.

That is, the camera mounting holes 28a, 28b and the guide holes 36a, 36b of the bracket 24 are inserted into the heads 18e, 18f of the grip engaging / disengaging pins 18a, 18b provided on the camera body 4 side, respectively, and the grip device 22 is inserted. And lift the groove portions 36c and 36d into the grip engaging / disengaging pin 18
It is moved to the lower ends of the shaft portions 18c and 18d of a and 18b.
Then, the grip device 22 is mounted on the camera 2 by bringing the crank portion 32 into contact with the accessory mounting pin 20 and rotating and tightening the clamp knob 34. Then, connect the connector portion 46 of the cord member 44 to the camera body 4
Mounted on the external power source socket 16 on the side of the camera body 4 and the external battery chamber 40 is connected via the cord member 44 to the battery chamber 12 on the camera body 4 side
And the lithium batteries 38a and 38b in the external battery chamber 40 are used as shutter control batteries.
By mounting the connector portion 46 on the external power socket 16 on the camera body 4 side, the battery (4SR44 type silver oxide battery or the like) in the battery chamber 12 of the camera 2 can be removed from the external battery chamber 40.
The power supply line is switched to the lithium batteries 38a and 38b therein. Further, when the grip device 22 is detached from the camera body 4, it can be detached by turning the clamp knob in the opposite direction to loosen the clamp portion 32.

In this way, the battery chamber 12 of the camera body 4
A lithium battery 38a, 38b (CR123A) with a large capacity and good low-temperature characteristics, which is stored in the external battery chamber 40 in the grip portion 26, is used instead of the shutter control dedicated battery (4SR44 type silver oxide battery or the like) stored in the camera. By using the shutter speed control of No. 2 and the power source of the exposure meter, it is possible to take a picture for a long time without replacing the battery even when taking a long exposure with a valve shutter or taking a picture in a cold region. Further, since the lithium batteries 38a and 38b have good low-temperature characteristics, it is possible to take pictures even at low temperatures without heat retention processing. Furthermore, the lithium batteries 38a, 38
Since b (CR123A) is cheaper than the silver battery (4SR44) housed in the battery chamber 12 of the camera body 4, the cost for battery replacement can be reduced.

[0011]

As is apparent from the above description, according to the present invention, a large capacity external battery is housed in the grip portion for holding the camera body of the grip device detachably attached to the camera body. Since the electric energy of the external battery can be supplied to the camera body side, deterioration of the battery performance can be reduced and long-time shooting can be performed even when used for long-time exposure or in cold regions. Further, by storing and attaching the external battery in the grip portion of the grip device, the cord member connected to the camera side can be shortened, so that the handling of the cord member is eliminated and the operability of the camera is improved. be able to.

[Brief description of drawings]

FIG. 1 is a front view showing an external battery mounting structure of a camera according to the present invention.

FIG. 2 is a perspective view showing a camera to which an external battery is attached.

FIG. 3 is a perspective view showing a grip device accommodating an external battery attached to the camera shown in FIG.

[Description of sign]

 2 camera 4 camera body 18a, 18b grip engaging / disengaging pin 20 accessory mounting pin 22 grip device 24 bracket 26 grip part 30a, 30b camera mounting hole 32 clamp part 38a, 38b lithium battery 40 external battery chamber 44 cord member 46 connector part

Claims (3)

[Claims] 1. A camera provided with a grip mounting member for removably mounting a grip device for holding a camera body, and a battery chamber for accommodating a battery exclusively used for shutter control, wherein an external battery different from the battery is used. An external battery mounting structure for supplying energy, which is formed in a grip part for holding the camera body of a grip device mounted on the grip mounting member and has a larger capacity than a battery dedicated to the shutter control. An external battery chamber for accommodating an external battery, a cord member electrically connected to the external battery accommodated in the external battery chamber, provided at an end of the cord member, and detachable on the camera body side. And a connector section for supplying electric energy of the external battery to the camera body side by being connected to the camera body. Part battery mounting structure. 2. The camera is a 6 × 4.5 format, 6 × 6
The external battery mounting structure for a camera according to claim 1, which is a medium format camera of 6 format, 6 format, or 6 format. 3. The external battery mounting structure for a camera according to claim 1, wherein the external battery housed in the external battery chamber is a lithium battery.