JP3488883B2 - Fixing device for attachment to camera body - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for fixing an attachment to a camera body for fixing an attachment such as a battery case to the bottom surface of a video camera body.

[0002]

2. Description of the Related Art Conventionally, a video camera has been developed which can be connected to a trapezoidal connection adapter which is pre-connected to a device such as a television set or a video deck. Is provided with a terminal for connecting to a connection adapter. And when carrying it, connect the terminal from the battery to this terminal,
The case containing the battery is fixed to the bottom of the camera body.

To fix the battery case to the bottom surface of the camera body, as shown in FIG. 4, the fixing male screw 1 provided on the battery case B is fitted into the tripod fixing female screw hole 2 provided on the bottom surface of the camera body A. A fixing device adapted to be screwed is used.

In this conventional fixing device, a male screw 1 is formed on an upper end of a shaft 3 which penetrates a battery case B, and a rotary operation knob 4 is integrally provided on a lower end thereof. The male screw 1 is attached to a battery by a spring 5. It is known that the case B is biased to the side where the knob 4 is pulled in to a height that does not protrude from the camera body mounting surface or the side where the knob 4 contacts the bottom surface side of the case.

[0005]

In the conventional fixing device as described above, since the male screw and the knob are integrally provided at the upper and lower ends of the shaft which penetrates the battery case, the knob is pushed when the male screw side is pushed. If you push the knob on the bottom of the case and push the knob backward, the male screw will protrude.For example, if you try to mount the camera body with the battery case placed on a table, the knob will be pushed and the male screw will be mounted. There was a problem that it would not be able to be mounted smoothly because it would protrude to the surface.

Further, when the battery case and the camera body are joined and the male and female screws are not screwed together, the knob projects to the bottom side, and there is a problem that the operability of the knob is not so good.

The present invention has been made in view of such conventional problems.
The purpose is to provide a device for fixing the object to be attached to the camera body that allows the camera body to be smoothly joined even when the object to be attached such as a battery case is placed on a table or the like, and the picking operation is stable and smooth. It is a thing.

[0008]

The features of the present invention for solving the above-mentioned conventional problems and achieving the intended object are that a female screw hole for fixing a tripod on a bottom surface of a camera body, a battery case, and the like. A male body that can be freely put in and taken out from the joint surface of the camera body of the mounted object and is biased in the protruding direction by a spring.
The screw can be screwed freely, and the male screw
Direction is immovable and rotatable,
And fitted so that they cannot rotate and can move relative to each other in the axial direction.
In a mounting object fixing device for a camera body for fixing the mounting object to the bottom surface of the camera body by rotating the mounting operation knob , a lower end is provided in the mounting object case body portion.
An open cylindrical case is integrally formed on the bottom surface of the case body.
The upper end of the tubular case has an opening smaller than the body.
The opening is communicated with the upper surface of the case body,
A knob member is provided at the lower end opening of the tubular case,
Mounted so that it is rotatable with respect to the
The knob member has the rotary operation knob at the lower end of the shaft portion.
The male screw is formed in a body and is formed in the cylindrical case.
Member having a tip at the tip and urging the screw member upward
Housing the spring, and insert the male screw through the opening.
The lower end portion of the screw member is fitted to the shaft portion of the knob member so as to be non-rotatable and movable in the axial direction.

The knob for rotating operation is on the bottom of the case body.
It is preferably housed in the formed recess .

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS.
3 will be described.

In the figure, A is a camera body, and B is a battery case which is an object to be attached to the camera body A.

On the bottom surface of the camera body A, a jack C for power supply, input / output and other signals is provided, and a female screw hole 2 for fixing a tripod is provided.

The battery case B has a plate-shaped upper lid portion 10.
a and a case body 10b having a battery housing (not shown) inside and the like, formed into a box shape so that a battery (not shown) can be housed inside and out and an upper lid The upper surface of the portion 10a serves as a camera body joint surface 11, and a plug 12 to be inserted into the jack C of the camera body A is projected on the joint surface 11.

The battery case B is provided with a fixing device 20 for the female screw hole 2 of the camera body A. In this fixing device 20, the male screw 30 projecting from the camera body joint surface 11 is rotated by the rotary operation knob 34 from the bottom surface side of the case body portion 10b to be screwed into the female screw hole 2 of the camera body A. It has become.

Each component of the fixing device 20 is housed and assembled in a cylindrical case 21 integrally formed with the case body 10b. The lower end of the cylindrical case 21 is open to the bottom surface of the case body 10b, and the upper end has an opening 22 having an inner diameter smaller than that of the body.
Is communicated with the male screw insertion hole 13 formed in the upper lid portion 10a.

A screw member 23, a coil spring 24, and a knob member 25 are inserted into and mounted on the cylindrical case 21 from the lower opening, and are prevented from coming off by a stopper plate 26. The screw member 23 is integrally formed with a male screw 30 at the upper end, a flange 31 at the center, and a square shaft 32 at the lower end in a coaxial arrangement. The male screw 30 is projected upward by the upper end opening 22 of the tubular case 21. The coil spring 2 in the direction in which the upper surface of the flange 31 is joined to the inside of the top surface of the cylindrical case 21.
4 is biased upward.

The knob member 25 has a shaft portion 33 and a rotary operation knob 34 composed of a ridge formed integrally with the lower end of the shaft portion 33. The shaft portion 33 is formed with a concave groove on which the side surface of the cylindrical case 21 is formed. The stopper plate 26 is inserted and is attached to the tubular case 21 so as to be rotatable and immovable in the axial direction.

The knob 34 is housed in the recess 35 in the bottom surface of the case body 10b so as not to project from the bottom surface of the case body.

A square hole 36 is formed in the center of the shaft portion 33, and the square shaft 32 at the lower end of the screw member 23 is fitted in the square hole 36 so as to be movable in the axial direction. Cage,
As a result, by rotating the knob 34, the screw member 23 is rotated, and when a force in the pushing direction is applied to the male screw 30 from above, the male screw member 23 moves against the coil spring 24. With this, the male screw 30 can be pushed to the same height as the camera body joint surface 11.

In the fixing by the fixing device constructed as described above, the camera body A is joined to the camera body joint surface 11 of the battery case B in a predetermined direction while inserting the plug 12 into the jack C. At this time, as shown in FIG. 3, the male screw 30 is pushed at its upper end in a state of being coaxially aligned with the female screw hole 2, and is pushed into the male screw receiving / inserting hole 13 against the coil spring 24. Then, when the knob 34 is rotated in the screw advancing direction of the male screw 30 in this state, the screw member 23 is rotated via the angular shaft 32, and the male screw 30 is inserted into the female screw hole 2 by the coil spring 24. Since it is pressed, it is screwed into the female screw hole 2.

On the other hand, at the time of removal, by rotating the knob 34 in the backward direction of the male screw, the male screw 30 is rotated in the releasing direction, is retracted against the coil spring 24, and is removed from the female screw hole 2. .

Although the above-described embodiment shows fixing of the battery case, the present invention is not limited to this, and can also be applied to fixing other attachments such as a television set connecting adapter.

[0023]

As described above, in the present invention, the male screw to be screwed into the female screw hole of the camera body is separate from the knob for rotating the same, and the knob is axially attached to the mounting object. Is rotatably supported in immovable, and axially movable with respect to this, and a male screw is installed so as to rotate together, and by urging the male screw in the protruding direction by a spring, When joining the camera body to the joint surface of the attachment, the knob for rotation operation does not project to the bottom side, and the attachment work of the camera body can be done with the attachment placed on the table etc. Since the screwing and removing operations can be performed by a knob operation that does not move in the axial direction, the operability is good.

Further, by assembling the male screw, the spring and the knob in the cylindrical case provided integrally with the outer wall of the bottom surface of the mounting object, the assembly of the fixing device is completed separately from the assembly of the upper lid of the mounting object. It is possible to confirm the suitability of the operation before the assembly of the entire mounted article is completed, and the defective product generation rate after the completion of the entire assembly is reduced.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view of an example of a wearing object fixing device of the present invention.

FIG. 2 is an enlarged cross-sectional view of a fixing device portion of the above.

FIG. 3 is a partially enlarged cross-sectional side view showing a state when the camera body of the above is joined.

FIG. 4 is a partial vertical side view of an example of a conventional device.

[Explanation of symbols]

A camera body B battery case C Jack 2 Female screw hole 10a Top lid 10b Case body 11 Camera body joint surface 12 plugs 13 Male screw hole 20 Fixing device 21 tubular case 22 opening 23 Screw member 24 coil spring 25 Picking member 26 Stopper 30 male screw 31 flange 32 square axis 33 Shaft 34 Rotating knob 35 recess 36 Square Hole

Claims (2)

(57) [Claims] 1. A tripod fixing female screw hole on the bottom of the camera body,
It can be freely moved in and out from the camera body joint surface of the attached object such as battery case, and it is urged by the spring in the protruding direction.
The attached male screw can be screwed freely, and the male screw can be attached to the attachment.
On the other hand, it is immovable in the axial direction and rotatable, and
Fits so that it cannot rotate relative to the shaft and can move relative to the axial direction.
In a device for fixing an attachment to a camera body for fixing the attachment to the bottom surface of the camera body by rotating the attachment operation knob , the lower end of the attachment body case main body has a lower end of the case body portion.
It is equipped with an open cylindrical case on the bottom,
The upper end of the space has an opening smaller than the trunk, and the opening is
A communication opening is formed on the upper surface of the case body,
A knob member is attached to the opening on the lower end side to rotate with respect to the cylindrical case.
Present and axially immovably mounted, the knob member is
The rotary operation knob is integrally formed on the lower end of the shaft.
Screw having the male screw at the tip inside the tubular case.
Accommodating a spring that biases the member and the screw member upward
Then, project the male screw through the opening onto the upper surface of the case body.
An apparatus for fixing an object to be mounted to a camera body, characterized in that the lower end side end portion of the screw member is fitted to the shaft portion of the knob member so as not to rotate and movable in the axial direction. 2. The knob for rotating operation is formed on the bottom surface of the case body.
2. The attachment fixing device to the camera body according to claim 1, wherein the attachment fixing device is housed in the recessed portion .