JP4143159B2 - Manual lens barrier for cameras - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a manual lens barrier mechanism for a still camera and a video camera.
[0002]
[Prior art]
FIG. 4A is an external view of an example of a lens barrier mechanism unit of a video camera according to a conventional example, and FIG. 4B is an explanatory view of opening and closing operations of the lens barrier mechanism.
[0003]
4A and 4B, reference numeral 1001 denotes a lens cover that covers the vicinity of the lens, reference numeral 1002 denotes a sliding portion of an open / close switch that opens and closes the lens barrier 1004, and reference numeral 1003 denotes an opening for allowing light to enter the lens. , 1004 is a lens barrier member, 1005 is an open / close switch for opening and closing the lens barrier, 1006 is a switch guide for transmitting the movement of the open / close switch 1005 to the lens barrier, and the open / close switch 1005 is fitted. And are connected by screws or the like (not shown).
[0004]
Reference numeral 1007 denotes a guide pin press-fitted into the lens barrier member 1004, 1008 denotes a rotation center shaft integrally arranged from the lens cover 1001, and 1009 denotes a spring fixing pin similarly arranged integrally from the lens cover 1001. Is the torsion spring that operates the lens barrier, 1011 is the movement locus of the right end of the lens barrier member 1004, 1012 is a spring fixing hole installed in the lens barrier member 1004, and the tip of the torsion spring bent to the front side of the paper is hooked I'm crazy.
Next, the operation of opening and closing the lens barrier will be described with reference to FIG.
In FIG. 6B, the solid line indicates the lens barrier closed state, and the double-dot chain line indicates the open state. First, in the closed state, the torsion spring 1010 exerts torque in the direction of closing the lens barrier member 1004 via the spring fixing hole 1012.
[0005]
When the open / close switch 1005 is pushed up from this state, the switch guide 1006 moves upward and rotates the lens barrier member 1004 through the guide pin 1007 in the opening direction. At this time, the torque direction of the torsion spring 1010 is switched to the direction of opening the lens barrier member 1004 as shown in FIG.
[0006]
By operating the opening / closing switch 1005 by the above operation, the spring force is reversed and applied in the opening or closing direction at a certain point, and the lens barrier member 1004 can be fixed to either the opening / closing state. It was configured as follows.
[0007]
[Problems to be solved by the invention]
However, the above conventional example has the following problems:
(1) The torsion spring 1010 requires a space in the thickness direction for the number of turns, and also requires a space for an area for moving the coil portion by the reversing operation.
[0008]
(2) Since the lens barrier mechanism is opened and closed by the rotation mechanism of the lens barrier member 1004, a dead space is generated in the width direction of the lens cover 1001 by the lens barrier operation locus 1011 shown in FIG. End up.
[0009]
The present invention has been made in view of the above circumstances, and provides a manual lens barrier for a camera according to this type of opening / closing mechanism for opening and closing a lens barrier member with a small operation dead space in both the vertical direction and the width direction. It is an object.
[0010]
[Means for Solving the Problems]
Therefore, the present invention seeks to achieve the above object by providing a manual lens barrier mechanism shown in either of the following items (1) or ( 2 ):
(1) A lens barrier that can cover an opening for allowing light to enter the lens in the first direction, and a second that is orthogonal to the first direction when the open / close switch is operated . An elastic member that can rotate around the lever pin in the second direction so as to open and close in the direction, and an elastic member that urges the hydraulic member with the first direction as a longitudinal direction. The member fixes the lens barrier to either open or close by biasing the actuating member that rotates about the lever pin in the second direction in a direction orthogonal to the first and second directions. A manual lens barrier for cameras.
(2) The manual lens barrier for a camera according to (1), wherein the operation of the lens barrier is a linear operation via a guide rail.
[0014]
[Action]
With the above-described configuration of the present invention, the following operational effects can be obtained.
(1) A lens barrier operation leaf spring member is arranged in a direction substantially perpendicular to the lens barrier opening and closing operation surface, and a spring force is applied to the lens barrier operation lever in a direction substantially parallel to the lens barrier operation plane. In addition, by reversing the lens barrier, the vertical dead space can be reduced and the camera can be made thinner.
[0015]
(2) Further, by making the lens barrier operation linearly through the guide rail, the dead space in the width direction can be reduced, and the camera can be miniaturized.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings based on a preferred embodiment.
[0017]
【Example】
1, 2 and 3 are explanatory views of an embodiment according to the present invention. 1 is an exploded perspective view of the lens barrier mechanism according to the present embodiment, FIG. 2 is an operation explanatory view of the lens barrier mechanism of FIG. 1, and FIG. 3 is a cross-sectional view taken along line AA of FIG.
[0018]
(Constitution)
1-3, 101 is a lens cover that covers the vicinity of the lens, 102 is a sliding portion of an open / close switch that opens and closes the lens barrier member 104, 103 is an opening for allowing light to enter the lens, and 104 is As shown in FIG. 1, two guide pins 109 for guiding are press-fitted to the back side of the lens barrier member made of a metal plate. Furthermore, the front side of FIG. 1 is embossed for sliding (five pieces).
[0019]
Reference numeral 105 denotes an open / close switch for opening and closing the lens barrier 104, and 106 denotes a switch guide for transmitting the movement of the open / close switch 105 to the lens barrier. As shown in FIG. It is connected. Reference numeral 107 denotes a base member on which the lens barrier member slides, which is a metal plate.
[0020]
Reference numeral 108 denotes a detection switch, which is configured to be turned on when the barrier is closed, and is used to turn on / off video power, pause, standby, and the like by opening and closing the barrier. This switch is fixed to the lens cover 101 so as to be sandwiched between a holder 119 and a rail 110 described later.
[0021]
Reference numeral 110 denotes a rail for guiding the lens barrier member 104, and is guided so as to slide up and down while restricting the lens barrier member 104 in the thickness direction and the left-right direction as shown in the right end portion of FIG. As for the left and right guides, as shown in FIG. 1, the right guide of the rail 110 is short, so the rail groove 122 is provided on the left side, and the guide pins 109 (two pieces) are fitted into the groove 122. Thus, the left / right regulation of the lens barrier member 104 is ensured.
[0022]
Reference numeral 111 denotes a lever as an operating member made of a metal plate. As shown in FIG. 1, lever pins 112, 113, and 114 each having a shape as shown in the figure are press-fitted at three places on the left and right centers. Further, a lever ring 115 is fitted and attached to the inside of the lever pin 114, and a cut washer 116 is attached to prevent it from coming off (see FIG. 3 for the detailed configuration). Further, as shown in FIG. 1, the lever pin 113 has a stepped flange. The lever pin 113 is fitted in and slides in the lower left elongated hole portion of the lens barrier member 104, whereby the rotation operation of the lever 111 is controlled. 104 is converted into a straight-ahead operation.
[0023]
Reference numeral 119 denotes a holder for fixing the lever 111, and the lever pin 112 is passed through a central hole and fixed by a cutting washer 116 so as to be rotatable. Reference numeral 118 denotes a leaf spring as a U-shaped elastic member, which is fixed to the holder 119 by fitting a claw and a hole as shown in FIG. The spring force is always applied in the horizontal direction.
[0024]
The above parts are sandwiched between the holder 119 and the rail 110 with the configuration as shown in FIG. 1 and fixed with five screws 117. The holder 119 and the rail 110 are temporarily fixed with one screw 117 (a screw inserted from the near side) in advance in consideration of assembly workability.
[0025]
Reference numeral 120 denotes a lens unit having a lens group for imaging, and the optical axis is in the direction perpendicular to the paper surface. Reference numeral 121 denotes a prism for bending the light beam path by 90 degrees, and the lens unit 120 can be arranged vertically by being installed in the orientation shown in the figure.
[0026]
(Operation)
Next, the opening / closing operation of the lens barrier will be described with reference to FIGS.
In FIG. 2, a solid line indicates a lens barrier closed state, and a two-dot chain line indicates an open state. First, in the closed state, the leaf spring 118 always applies a force to the lever 111 in the right direction of the drawing, so that the lens barrier 104 is applied in the closing direction. When the open / close switch 105 is pushed up from this state, the switch guide 106 operates upward, and the lens barrier 104 slides in the opening direction via the lever 111. At this time, in the vicinity of the center of the slide stroke, the force of the leaf spring 118 is switched in the direction of closing the lens barrier 104 as illustrated.
[0027]
With the above operation, the lens barrier member 104 can be fixed to either open or closed by operating the open / close switch 105 with the spring force reversed and applied in the opening or closing direction at a certain point.
[0028]
【The invention's effect】
As described above, according to the present invention, the following effects can be obtained:
(1) A lens barrier operation plate elastic member is disposed in a substantially vertical direction with respect to the lens barrier opening / closing operation surface, and an elastic force is applied to the lens barrier operation lever in a substantially operation plane direction of the lens barrier. Thus, the lens barrier was reversed. As a result, an L-shaped unit configuration is obtained, and the lens barrier mechanism can be installed in a dead space that is less perpendicular to the lens barrier surface. Therefore, thinner still cameras, video cameras, and the like can be realized.
[0029]
(2) Since the lens barrier operation is a linear operation through the guide rail, there is no dead space in the width direction compared to the rotation operation, and a smaller still camera, video camera, or the like can be realized.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a lens barrier mechanism according to an embodiment. FIG. 2 is an operation explanatory diagram of the lens barrier mechanism according to the embodiment. FIG. 3 is a cross-sectional view taken along line AA in FIG. ) External view of lens barrier mechanism unit of conventional video camera, (b) Explanatory drawing of opening / closing operation [Explanation of symbols]
101 Lens cover 102 Open / close switch sliding portion 103 Lens opening 104 Lens barrier member 105 Open / close switch 106 Switch guide 107 Base member 108 Detection switch 109 Barrier guide pin 110 Rail 111 Lever 112 Lever pin (center)
113 Lever pin (barrier side)
114 Lever pin (leaf spring side)
115 Lever ring 116 Notch washer 117 Screw 118 Leaf spring 119 Holder 120 Lens unit 121 Prism 122 Rail groove 1001 Lens cover 1002 Open / close switch sliding portion 1003 Lens opening 1004 Lens barrier member 1005 Open / close switch 1006 Switch guide 1007 Guide pin 1008 Center of rotation Shaft 1009 Spring fixing pin 1010 Torsion spring 1011 Lens barrier operation locus 1012 Spring fixing hole

Claims (2)

A lens barrier capable of covering an opening for allowing light to enter the lens in a first direction ;
An operation member capable of rotating around the lever pin in the second direction so as to open and close the lens barrier in a second direction orthogonal to the first direction in accordance with an operation of the open / close switch ;
Wherein the first direction is the longitudinal direction, made of an elastic member which biases the operation member,
The elastic member fixes the lens barrier to either open or close by urging the actuating member rotating around the lever pin in the second direction in a direction orthogonal to the first and second directions. A manual lens barrier for a camera.   2. The camera manual lens barrier according to claim 1, wherein the operation of the lens barrier is a linear operation via a guide rail.

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