JP2001290196A - Barrier device for optical equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a barrier device in which the lifting of the end part of a barrier is eliminated. SOLUTION: A gear part 1a, a guide rail part 1b, a screwing hole 1c and a lifting stop 1d are formed at the barrier 1. A screwing through-hole 2a and a lifting stop locking part 2c are formed at a guide plate 2. A holding plate spring actuates so as to press the barrier 1 to a camera side, and a machine screw 8 is screwed and fixed at the screwing hole 1c together with the guide plate 2 through the through-hole. A clamping member 4 has an oblong hole 4a, a clomp part 4b, a spherical protrusion 4c and an arm part 4d screwed and fixed on the camera side. A gear 6 engaged with the gear part 1a is fixed to both ends of a supporting bar 5 by penetrating through the oblong hole 4a. A gear pressing spring 7 has an action to press the supporting bar 5 and the gear 6 to the side of the barrier 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a barrier device that slides along an outer surface of an optical device such as a camera.

[0002]

2. Description of the Related Art In recent years, most cameras have been equipped with an optical device, for example, a barrier mechanism for protecting a taking lens and a lens barrel of a camera. Such barrier mechanisms are broadly classified into two types: an in-barrel barrier having barrier blades in the barrel, and an outer sliding barrier that slides open and close the front of the camera exterior. The in-barrel barrier type has the advantage of being relatively space-saving and close to the operation of the lens barrel, so that it is relatively easy to automate. The outer slide barrier has the advantage that the mechanism is relatively simple and a large area can be protected.

In recent years, not only are the camera functions automated and sophisticated, but also compact and beautiful-looking style cameras are gaining popularity on the market. In that respect, the outer slide barrier is ideal for producing a camera with a beautiful appearance, taking advantage of the ability to cover a large area when the barrier is closed. That is, the lens barrel, the finder window, the AF projection / reception window, the AE window, and the like, which are the functional units of the camera, are all covered with the barrier, so that an appearance that is invisible to the camera at first glance can be achieved. Many cameras use an outer slide barrier type barrier in order to achieve such advantages, but since the guide grooves etc. for supporting slides are provided on the outer surface of the camera, the appearance is often impaired. is there. In view of this point, Japanese Patent Application Laid-Open No. H8-6114 proposes a barrier mechanism in which a guide for a barrier slide does not appear in appearance.

[0004]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 8-611 is disclosed.
No. 4 is characterized in that a mechanism that slides and holds a portion covered by the barrier in both the open state and the closed state of the barrier is provided, and a configuration for achieving the mechanism is disclosed. The slide holding mechanism must be configured in a small space of a portion covered by both the barrier closed state and the barrier open state of the camera. For this reason, the end farther from the holding unit is in an unstable state due to the influence of product play and bending.

In other words, at the end of the sliding operation, that is, at the barrier open state and the closed state, if a lock mechanism for fixing the barrier is provided, the instability in the open / close state can be eliminated, but the end of the barrier floats during the operation. If this happens, there is a disadvantage that a phenomenon of not engaging with the lock mechanism occurs.

The present invention has been made to solve such a problem, and provides a barrier device in which a slide holding portion of a barrier is securely engaged with a lock mechanism and an end of the barrier is not lifted. The purpose is to:

[0007]

According to a first aspect of the present invention, there is provided a barrier apparatus for an optical device which slides a front exterior surface of an optical device substantially in parallel. A barrier device for an optical device, characterized in that the sliding movement trajectory has a curvature larger than the curvature of the front surface of the optical device, wherein the guide rail having a curvature larger than the curvature of the front exterior surface is provided on the back surface of the barrier. 2. The barrier device for an optical device according to claim 1, further comprising barrier holding means for holding the barrier slidably along the guide rail.

With these configurations, a force for urging the end far from the slide holding portion toward the optical device body such as a camera is generated, so that it is difficult to float and can be securely engaged with the lock mechanism.

According to a third aspect of the present invention, there is provided a barrier device for an optical device which slides in a direction substantially parallel to a front exterior surface of the optical device, wherein a guide rail forming a slide track on the back surface of the barrier and a curvature of the guide rail are set. A gear portion having substantially the same curvature, and two upper and lower gears meshing with the gear portion; a bar member for integrally rotatably connecting the gears; and a gear holding member for rotatably fixing and holding the gear to the camera. And a biasing member for biasing the barrier in the direction of the bar member, and a bar biasing member for biasing the bar member in the barrier direction, wherein the curvature of the guide rail is greater than the curvature of the front exterior surface. According to a fourth aspect of the present invention, there is provided a barrier device for an optical device according to the third aspect, wherein the barrier device is configured to prevent floating at the barrier open end and the barrier closed end. A barrier device of the optical apparatus characterized by having a locking mechanism.

With this configuration, a force for urging the end far from the slide holding portion toward the optical device body such as a camera is generated, so that it is difficult to float and can be securely engaged with the lock mechanism.

[0011]

FIG. 1 is an exploded perspective view of a barrier mechanism according to the present embodiment. Reference numeral 1 denotes a barrier, which is formed with a gear portion 1a, a guide rail portion 1b, a screw hole 1c, and a floating stopper 1d. I have. Reference numeral 2 denotes a guide plate, which is a through hole 2 for screwing.
a and a retaining lock 2c. Reference numeral 3 denotes a holding plate spring, which acts to urge the barrier 1 toward the camera as described later, and screws 8 together with the guide plate 2 fit into the screw stopper holes 1c through through holes (not shown). Fixed. Reference numeral 4 denotes a clamp member, which includes an elongated hole 4a, a clamp portion 4b, a spherical protrusion 4c, and an arm portion 4 which is screwed and fixed to the camera.
d. A support bar 5 penetrates the elongated hole 4a and has a gear 6 fixed to both ends thereof for engaging with the gear portion 1a. Reference numeral 7 denotes a gear urging spring, which has an operation of urging the support bar 5 and the gear 6 toward the barrier 1.

The operation of the above configuration will be described with reference to FIG. First, since the clamp member 4 is fixed to the camera by screws, the clamp member 4 will be considered as a reference. The holding plate spring 3 generates a spring force in a direction separating the clamp portion 4b and the guide plate 2 from each other, and urges the guide plate 2 to the clamp member 4 rightward in the drawing. Barrier 1
Is urged rightward in the figure. The barrier 1 urged rightward keeps the spherical projection 4c in contact with the barrier. Next, the gear urging spring 7 urges the support bar 5 together with the gear 6 to the left in the drawing with respect to the clamp member 4, so that the flange 6a of the gear 6 is connected to the guide rail 1b.
Gear 6 and the gear portion 1
The action of urging a to engage also occurs.

With the above arrangement, when the photographer operates the barrier 1 in the opening / closing direction, the barrier 1 slides along the curvature of the guide rail 1b. At this time, the gear 6 is in the gear portion 1a.
However, the upper and lower two gears 6 rotate integrally via the support bar 5, so that the meshing restricts the play in the rotation direction of the barrier and acts to smoothly slide. . Further, in order to make the operation smooth, the gear portion 1a is also formed of an internal gear so as to have the same curvature as the guide rail.

FIG. 3 is a cross-sectional view of a camera for explaining the principle of the slide trajectory of the barrier. In FIG. 3, 31 is a camera, 32 is a curvature of a guide rail, and 33 is a curvature of an exterior. In addition, 1 is a barrier. As shown in the figure,
Since the curvature 32 of the guide rail is larger than the curvature 33 of the exterior, the barrier 1 receives the force drawn toward the camera 31 at the open / close end, so that the end is securely locked without lifting.

FIG. 4 is a front view showing an operation range of a barrier according to an embodiment of the present invention. FIG. 5 is a cross-sectional view showing a locked state at the open / close end of the barrier. 4 and 5, reference numeral 101 denotes a camera, and 102 and 103 denote barriers. As shown in FIGS. 4 and 5, the barriers 102 and 103
The left and right sides of the central portion 104 of the camera 101 are slid.

[0016]

As described above, according to the first aspect of the present invention, in a barrier device of an optical device which slides on a front exterior surface of an optical device substantially in parallel, the curvature of the front exterior surface is larger than the curvature of the front exterior surface. A barrier device for an optical device, wherein the barrier device has a slide movement locus having a large curvature.

According to this configuration, a force for urging the optical device main body such as a camera is generated at an end far from the slide holding portion, so that it is difficult to float and can be securely engaged with the lock mechanism.

According to the second aspect of the present invention, a guide rail having a curvature larger than the curvature of the front exterior surface is provided on the back surface of the barrier, and barrier holding means for holding the barrier slidably along the guide rail is provided. The barrier device for an optical device according to claim 1, wherein

According to this configuration, a force for urging the optical device body such as a camera is generated at an end far from the slide holding portion, so that it is difficult to float and can be securely engaged with the lock mechanism.

According to the third aspect of the present invention, in a barrier device for an optical device that slides in a direction substantially parallel to a front exterior surface of the optical device, a guide rail that forms a slide track on the back surface of the barrier and the guide rail of the guide rail. A gear part having substantially the same curvature as the gear part, two upper and lower gears meshing with the gear part, a bar member for integrally rotatably connecting the gears, and a gear for fixing and holding the gears rotatably to the camera; It has a biasing member for biasing the holding member and the barrier in the direction of the bar member and a bar biasing member for biasing the bar member in the barrier direction, wherein the curvature of the guide rail is greater than the curvature of the front exterior surface. According to the fourth aspect of the present invention, there is provided a barrier device for an optical device according to the third aspect, wherein the barrier opening end and the barrier closing are provided. A barrier device of the optical apparatus characterized by having a locking mechanism of the document retaining at.

With these configurations, an urging force is applied to the optical device body such as a camera at an end far from the slide holding portion, so that the barrier is unlikely to float and can be securely engaged with the lock mechanism. it can.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a barrier device according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing a main part of a barrier according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a camera illustrating a principle of a slide trajectory of a barrier according to an embodiment of the present invention.

FIG. 4 is a front view showing an operation range of a barrier according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a locked state at an open / close end of a barrier according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Barrier 2 Guide plate 3 Holding plate spring 4 Clamp member 5 Support bar 6 Gear 7 Gear bias spring 8 Screw

Claims (4)

[Claims] 1. A barrier device for an optical device which slides a front exterior surface of an optical device in a substantially parallel manner, wherein a movement locus of the barrier device is a slide movement locus having a curvature larger than a curvature of the front exterior surface. Barrier device for optical equipment. 2. The device according to claim 1, wherein a guide rail having a curvature larger than the curvature of the front exterior surface is provided on the rear surface of the barrier, and barrier holding means for holding the barrier slidably along the guide rail is provided. A barrier device for the optical apparatus according to the above. 3. A barrier device for an optical device that slides in a direction substantially parallel to a front exterior surface of the optical device, wherein a guide rail that forms a slide track on the rear surface of the barrier and a gear portion having a curvature substantially equal to the curvature of the guide rail. The upper and lower two gears meshing with the gear portion, a bar member for integrally rotatably connecting the gear, a gear holding member for rotatably fixing and holding the gear to the camera, and a barrier are provided in the direction of the bar member. 2. The device according to claim 1, further comprising a biasing member for biasing the bar member in a barrier direction, wherein a curvature of the guide rail is greater than a curvature of the front exterior surface.
A barrier device for the optical apparatus according to the above. 4. The barrier device for an optical device according to claim 3, further comprising a lock mechanism for preventing floating at the barrier open end and the barrier closed end.