JP2903643B2 - Video camera converter lens - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a converter lens of a video camera, and more particularly to a converter lens with a built-in camera.

[Conventional technology]

In general, a video camera is provided with a converter lens such as a teleconverter lens or a wide converter lens as an accessory.The teleconverter lens is attached to the front of the taking lens for telephoto shooting, and the wide converter lens is attached to the taking lens for wide-angle shooting. By mounting the camera on the front, telephoto shooting or wide-angle shooting can be realized as compared with the case of using a shooting lens alone.

[Problems to be solved by the invention]

However, conventionally, this type of converter lens is screw-mounted or bayonet-type mounted on the mounting portion of the photographing lens, so that it cannot be detachably attached to the front of the photographing lens with one touch, and when detached, it is connected to the video camera. Apart from that, there is a problem that the converter lens must be carried separately, and the handling is troublesome.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a converter lens of a video camera which can be detachably attached to the front surface of a photographing lens with one touch and is easy to handle.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a video camera in which a zoom lens is arranged on the side of the largest area of a substantially rectangular parallelepiped video camera body so as to be substantially flush with the front surface of the video camera body. A converter lens, a lens support frame for supporting the converter lens,
An optical axis adjustment member that guides the lens support frame so as to be movable by a predetermined amount only in the X direction orthogonal to the optical axis of the converter lens, and that can fix the lens support frame within a predetermined amount of movement in the X direction; The optical axis adjustment member is guided so as to be movable by a predetermined amount only in a Y direction orthogonal to the optical axis of the converter lens and orthogonal to the X direction, and the optical axis adjustment member is moved within a predetermined amount of movement range in the Y direction. A fixable slide member, the slide member being disposed on a front surface of the video camera body and the zoom lens, wherein the converter lens moves between a front position of the zoom lens and a retracted position retracted from the zoom lens. Converter lens guide means for movably guiding a member, wherein the converter lens guide means itself and a lens support frame are provided in front of the video camera body and the zoom lens. Converter lens guide means formed so as not to protrude from the outer shape range, a slide knob for moving the converter lens, and click means for performing a click operation of the slide member at a front position and a retracted position of the zoom lens. It is characterized by having.

[Action]

According to the present invention, a video camera in which a shooting lens is arranged on the side of the video camera main body so as to be substantially flush with the front of the video camera main body, that is, a camera built-in type converter lens is provided on the front of the camera. The converter lens is a slide type that can move forward and backward in front of the taking lens in the minimum space.

Then, when the converter lens is moved to a front position or a retracted position in the photographing lens, a click operation is performed by a click unit.

〔Example〕

Hereinafter, preferred embodiments of a converter lens of a video camera according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a camera-integrated VTR provided with a converter lens of a video camera according to the present invention.

In this camera-integrated VTR, a zoom lens (photographing lens) 12 is arranged on a side of a video camera body 10 having a VTR section and the like. Front of video camera body 10 and shooting lens 12
The front surface of the lens is flat, and a sliding lens cover 20 and an outer cover 22 containing a converter lens (not shown) are attached to the front surface.

The lens cover 20 is spring-biased in the opening direction, and is released in a full-ople state when the lock release button 24 is pressed to release the lock. The opened lens cover 20 is locked again by being pulled out to a predetermined position using the knob 20A.

On the other hand, the converter lens is retracted from the front position (position where the optical axis coincides) of the photographing lens 12 and the photographing lens 12 by a slide knob (not shown) connected to the converter lens provided below the outer cover 22. It can be moved between the evacuation position. In FIG. 1, reference numeral 14 denotes an electronic viewfinder, and 16 denotes a microphone.

FIG. 2 is an exploded perspective view showing a structure of a lens cover, a converter lens, and the like housed in the outer cover.

In the figure, 20 is a lens cover, 30 is a converter lens unit including a converter lens (wide converter lens) 31, 40 and 50 are guide members, 42 is a lock lever, and 44 is a lock release lever.

The lens cover 20 has two guide pins (not shown) formed below the guide portion 20B.
Are formed in parallel with the guide pieces. Guide section 20B
The lens cover 20 is attached to the guide member 40 in a cantilever manner by sandwiching the upper portion of the guide member 40 with the guide piece and guiding the two guide pins into the guide groove 40A at the upper portion of the guide member 40. And are slidably guided.

The other guide member 50 is attached to the rear portion of the guide member 40 by three screws. The converter lens unit 30 is slidably disposed between the guide members 40 and 50, as described later.

A backing plate 52 is attached to the rear of the guide member 50 by screws.A lever 53, a bush 54, a torsion spring 55, and a slider 56 are disposed between the guide member 50 and the backing plate 52. ing.

That is, a pin 50A is implanted on the back surface (not shown) of the guide member 50, and the lever 53 and the bush 5 are attached to the pin 50A.
4 is inserted. The torsion spring 5 is located at the tip of the lever 53.
Five coil portions are attached, and the tip of the torsion spring 55 can be engaged with the slider 56.

The slider 56 has a guide portion 56A, and the guide portion 56A is slidably disposed with respect to the guide member 50 by sandwiching the ridge 50E of the guide member 50. Spring biased.

A pin 56B is implanted on the upper surface of the slider 56. The pin 56B is a U-shaped projecting piece 2 of the lens cover 20.
It can be engaged with 0C. As a result, the lens cover 20 is constantly biased in the direction of arrow A, that is, in the opening direction.

The lock lever 42 holds the lens cover 20 to the torsion 55
The guide member 40 is rotatably disposed so as to be immovable against the urging force. That is, the guide member 40
A pin 40B serving as a support shaft is implanted in the
Through the support shaft 42A of the lock lever 42, and then
1 is inserted through the support shaft portion 42B of the lock lever 42 through the lower surface of the guide member 40, so that the guide member 40 is rotatably disposed.

A leaf spring 43 is provided on the lower surface of the lock lever 42, and the distal end of the leaf spring 43 can contact the guide member 40. Therefore, the lock lever 42 is spring-biased by the leaf spring 43 in the direction in which the lever tip 42C projects. Note that the lever tip 42C is attached to the lens cover 20 when projected.
The rear end 20D can be abutted.

The lock release lever 44 is rotatably disposed on the guide member 40 by a pin 45 and an E-ring 46. A coil spring is provided between the guide member 40 and the lock release lever 44.
A lock release lever 44 is biased in the direction of arrow B via a coil spring 47 and a slide member 48.

One end 44A of the lock release lever 44 can abut on the rear end 42D of the lock lever 42. As a result, the other end 44B of the lock release lever 44 is pressed against the urging force of the coil spring 47, thereby pushing up the rear end 42D of the lock lever 42, and as a result, pushing down the lever tip 42C, The lock of the lens cover 20 by 42 can be released. The lock release button 24 shown in FIG.
44B can be pressed.

According to the above configuration, the lens cover 20 can be opened with one touch by pressing the lock release button 24, and the opened lens cover 20 can be pulled out using the knob 20, thereby covering the photographing lens 12 again. Can be. The amount of movement of the lock lever 42 at the time of locking / unlocking of the lever tip portion 42C is substantially the same as the plate thickness of the lens cover 20, so that a reduction in thickness can be realized.

On the other hand, the converter lens unit 30 mainly includes a wide converter lens (concave lens) 31, a lens support frame 32,
It comprises a lens pressing plate 33, an optical axis adjusting member 34 and a slide member 35.

The wide converter lens 31 is fitted into the lens support frame 32 and fixed by the lens pressing plate 33. The lens support frame 32 and the like are fixed to the optical axis adjustment member 34 by screws that are screwed to the optical axis adjustment member 34 through the long holes 33A and 32A.

Here, two long holes 34A are formed in the optical axis adjusting member 34, and two holes 34A are formed on the surface of the lens support frame 32 facing the long holes 34A.
Pins (not shown) are implanted in the book,
The lens support frame 32 and the like can be moved by a predetermined amount with respect to the optical axis adjusting member 34 in the longitudinal direction (X direction) of the long hole 34A.

Further, the optical axis adjustment member 34 is fixed to the slide member 35 by a screw that is screwed to the slide member 35 via the elongated hole 34B. Here, two pins 35A are implanted in the slide member 35, and two long holes (not shown) are formed in a surface of the optical axis adjustment member 34 facing the pins 35A. The optical axis adjustment member 34 has an elongated hole 34B with respect to the slide member 35.
In the longitudinal direction (Y direction).

The slide member 35 has a protrusion 35B at its lower end guided by the guide groove 50B of the guide member 50. The upper end and the lower end are slidably guided between the guide members 40 and 50. I have. The slide knob provided on the outer cover 22 is connected to the protruding piece 35D of the slide member 35.

On the other hand, the slide member 35 has a hole in which the ball 36 can roll.
35C is formed, and a leaf spring 37 for pressing the ball 36 toward the guide member 50 by the pressing portion 37A is provided. The guide member 50 has V grooves 50C and 50D into which the balls 36 fall.

Therefore, the ball 36 becomes V
By falling into the groove 50C or 50D, the slide member 35 performs a click operation. The ball 36 falls into the V groove 50C when the wide converter lens 31 moves to the front position of the photographing lens, and falls into the V groove 50D when it moves to the retracted position.

In addition, the plate spring 37 includes a slide member
A pressing portion 37B for pressing is formed on the 35 side. That is,
Adjusting the optical axis of the wide converter lens 31
After the lens cover 20 and the wide converter lens 31 are provided on the front of the camera by the like and the guide members 40 and 50 are attached, the operation is performed by using a driver or the like from the opening on the front of the lens. The pressing portion 37B prevents rattling of the optical axis adjusting member 34 (movement of the wide converter lens 31) during adjustment in the Y direction.

In the present embodiment, the video camera body and the photographing lens are externally mounted on the front surface. However, the present invention is not limited to this.

Further, in this type of camera-integrated VTR, the angle of view on the wide side is insufficient. Therefore, in the present embodiment, a macro-wide wide converter lens is provided. However, the present invention is not limited to this. It may be.
It should be noted that the wide converter lens can be constituted by one concave lens as shown in this embodiment, and the aperture can be made smaller than that of the teleconverter lens.

[Effects of the Invention] As described above, according to the present invention, since a slidable converter lens is provided integrally with a video camera, the converter lens can be detachably attached to the front surface of the photographing lens with one touch. Handling becomes easy.

[Brief description of the drawings]

FIG. 1 is a perspective view of a camera-integrated VTR provided with a converter lens of a video camera according to the present invention, and FIG.
FIG. 3 is an exploded perspective view showing a detailed structure inside the outer cover shown in FIG. 10 video camera body, 12 shooting lens, 20 lens cover, 22 exterior cover, 31 wide converter lens, 35 slide member, 36 ball, 37, 43
... leaf spring, 40, 50 ... guide member, 42 ... lock lever, 44 ... lock release lever, 50C, 50D ... V-groove, 55 ...
... torsion spring.

Claims (1)

(57) [Claims] 1. A video camera in which a zoom lens is disposed on a side of a substantially rectangular parallelepiped video camera main body having the largest area so as to be substantially flush with a front surface of the video camera main body. A lens support frame for supporting the converter lens, and the lens support frame is guided so as to be movable by a predetermined amount only in the X direction orthogonal to the optical axis of the converter lens, and the lens support frame is moved within a predetermined amount of movement in the X direction. An optical axis adjusting member that can be fixed at, and the optical axis adjusting member is guided so as to be movable by a predetermined amount only in a Y direction orthogonal to the optical axis of the converter lens and orthogonal to the X direction. A slide member that can be fixed within a predetermined range of movement in the Y direction; a video camera body and a front side of a zoom lens, wherein the converter lens is in front of the zoom lens. Converter lens guide means for movably guiding the slide member so as to move between a position and a retracted position retracted from the zoom lens, wherein the converter lens guide means itself and a lens support frame are provided with the video camera. A converter lens guide means formed so as not to protrude from the front surface and outer shape range of the main body and the zoom lens; a slide knob for moving the converter lens; and a click of the slide member at a front position and a retracted position of the zoom lens. A converter lens for a video camera, comprising: a click means for operating.