JPH07333687A - Camera with barrier - Google Patents

Abstract

PURPOSE:To provide a camera with slide barrier capable of smooth moving at the time of sliding. CONSTITUTION:The camera provided with the barrier 2 capable of being moved to a fully closing position for covering the front surface of a photographic lens 6 and a fully opening position for opening the front surface of the photographic lens has a click ball 5b having energizing force in a direction where the ball 5b comes into elastically contact with the barrier 2, barrier recessed parts 2f and 3d provided on the barrier 2 so as to be engaged with the ball 5b in the fully closing and opening positions and a recessed face 2g provided on the barrier 2 between both barrier recessed parts 2f and 2d to eliminate the energizing force in the moving range between the fully closing and opening positions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide type camera with a barrier.

[0002]

2. Description of the Related Art Conventionally, as a barrier positioning means for a camera having a sliding barrier, Japanese Patent Laid-Open Publication No. Hei 6-102570.
A barrier positioning means such as that used in the invention disclosed in Japanese Patent Publication has been proposed.

The above-mentioned barrier positioning means is shown in FIGS. 13, 14 and 15.

In FIGS. 13, 14, and 15, the front cover 3 is provided with a cylindrical boss portion 3b in the vicinity of the lens barrel 1 and on the left side toward the camera. A click spring 4b and a click ball 5b are built in the boss portion 3b, and the click spring 5b biases the click ball 5b forward.

FIG. 13 shows the state in which the barrier 2 is in the fully closed position 2 (A). In this state, the click ball 5b is pressed by the click spring 4b against the barrier recess 2f for effecting the click at the fully closed position 2 (A). FIG. 14 shows the state in which the barrier 2 is in the fully open position 2 (B). In this state, the click ball 5b is placed in the barrier recess 2d for enabling the click at the fully open position 2 (B).
Is pressed by the click spring 4b. Figure 15
Shows the state in which the barrier 2 is in the position (moving position 2 (C)) between the fully closed position 2 (A) and the fully opened position 2 (B). In this state, the click ball 5 is placed on the flat surface 2e of the barrier 2.
b is pressed by the click spring 4b.

[0006]

However, the technical means proposed in the above-mentioned Japanese Patent Application Laid-Open No. 6-102570 is to move the click ball 5b from the fully closed position 2 (A) (or the fully opened position 2 (B)). When the barrier 2 is opened (closed) with a sufficient force for pushing, the click ball 5b comes out of the barrier recess 2f (2d) and abuts on the flat surface 2e to slide. At this time, since the click spring 4b is deformed in the contracting direction, the amount of force pressed against the surface 2e of the click ball 5b becomes large, and the movement of the barrier 2 during the barrier slide becomes heavy.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a slide-type camera with a barrier in which the movement of the barrier is small when the barrier slides. And

[0008]

A slide-type camera with a barrier according to the present invention has a taking lens and slides in a direction intersecting the optical axis of the taking lens to cover the front side of the taking lens. In a camera with a slide-type barrier having a barrier that is slidable to a fully open position that does not cover the front of the taking lens, a force for sliding the barrier between the fully closed position and the fully open position, It is characterized in that the contact between the positioning means at the fully closed position and the position at the fully opened position is made concave so as to reduce it.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a slide type camera with a barrier according to the first embodiment of the present invention, showing a state in which the barrier 2 is fully opened. The position of the barrier 2 in this state is the fully open position 2.
(B). FIG. 2 is a perspective view showing a state where the barrier 2 is completely closed, and the position of the barrier 2 in this state is a fully closed position 2 (A). FIG. 3 is a perspective view of the state of FIG. 2 with the barrier 2 removed. It should be noted that the barrier 2 is arranged along the barrier rail groove 3a of the front cover 3 of the camera body and a similar groove (not shown) on the lower side, and the fully closed position 2 (A) of FIG. 2 and the fully opened position 2 (of FIG. 1). It can slide between B).

As shown in FIG. 3, the front cover 3 is provided with a cylindrical convex boss portion 3b on the left side of the front lens in the vicinity of the photographing lens 6. The boss portion 3b has a built-in click spring 4b and click ball 5b, which are biasing means, and the click ball 5b is biased forward by the click spring 4b.

FIG. 4 shows the boss portion 3 when the barrier 2 is fully closed.
It is a cross-sectional view in the surface which passes along b. In this state, the barrier recess 2 for enabling the click at the fully closed position 2 (A)
The click ball 5b is pressed against f by the click spring 4b. FIG. 5 is a cross-sectional view taken along a plane passing through the boss portion 3b when the barrier 2 is fully opened. In this state,
The click ball 5b is pressed by the click spring 4b into the barrier recess 2d for effecting the click at the fully open position 2 (B). FIG. 6 is a transverse cross-sectional view taken along a plane passing through the boss portion 3b in the moving state of the barrier 2. In addition,
The moving state of the barrier 2 means a state in which the barrier 2 is moving between the fully closed state and the fully opened state of the barrier 2. Further, the position of the barrier 2 is referred to as a moving position 2 (C). At this time, the click ball 5b contacts the concave surface 2g. The broken line display surface 2e is the concave portions 2d and 2f on the barrier.
Is a virtual surface that connects the upper ends of the.

Now, the barrier 2 is moved to the fully closed position 2 (A) in FIG.
Move position 2 (C) (or fully open position 2 (B) in FIG. 5)
From the moving position 2 (C), the click ball 5b comes into contact with the concave surface 2g at the moving position 2 (C). Compared with the case where the contact surface is a flat virtual surface 2e,
By making the abutting surface a concave surface 2g, the amount of contraction of the click spring 4b is reduced and the amount of force of the click ball 5b abutting on the barrier 2 is reduced. Therefore, the force required to slide the barrier 2 in the state where the barrier 2 is located at the moving position 2 (C) can be small. That is, the barrier can be slid with a light motion. The concave surface 2
The bottom of g has a depth such that the click ball 5b does not fall out of the boss portion 3b and the click spring 4b always urges the click ball 5b to the barrier 2, so rattling of the barrier 2 is also suppressed.

Next, a second embodiment of the present invention will be described with reference to the drawings.

In the first embodiment, the click ball 5b is installed on the front cover 3 so as to urge the click ball 5b in the forward direction, but in the present embodiment, the click ball 5c is urged in the upward direction. It is installed on the front cover 3.

FIG. 7 is a perspective view of the sliding camera with a barrier according to the present embodiment, showing a state in which the barrier is removed.
A convex portion 3c is provided on the front cover 3 in the vicinity of the taking lens 6 and on the left side of the camera. A click spring 4c and a click ball 5c are built in the convex portion 3c, and bias the click ball 5c upward.
Further, a click rail 2k with which the click ball 5c abuts is provided on the back surface of the barrier 2, and the click rail 2k has a concave portion 2j for performing positioning when the barrier 2 is in a fully closed state, and the barrier 2 Is provided with a concave portion 2i and a concave surface 2h for positioning when is fully opened (FIG. 8).
reference).

FIG. 8 is a perspective view of the barrier section as seen from the front of the camera when the barrier 2 is fully opened. In this state, the click ball 5c is pressed by the click spring 4c into the barrier recess 2i for effecting the click at the fully open position 2 (B). FIG. 9 is a perspective view of the barrier section as seen from the front of the camera when the barrier 2 is fully closed. In this state, the click ball 5c fits into the click spring 4 in the barrier recess 2j for effecting the click at the fully closed position 2 (A).
It is pressed by c. FIG. 10 is a perspective view of the barrier section as seen from the front of the camera in the moving state of the barrier 2.
The moving state of the barrier 2 means a state in which the barrier 2 is positioned between the fully closed state and the fully opened state of the barrier 2.
Further, the position of the barrier is set to the moving position 2 (C). In this state, the click ball 5c is formed on the concave surface 2h of the barrier.
Is pressed by the click spring 4c.

Now, the barrier 2 is moved to the fully closed position 2 (A) in FIG.
From the moving position 2 (C) (or the fully open position 2 (B) in FIG. 8)
From the moving position 2 (C), the click ball 5b contacts the concave surface 2h at the moving position 2 (C). As in the first embodiment, the amount of contraction of the click spring 4c is reduced by making the contacting surface concave 2h, and the amount of force of the click ball 5c contacting the click rail 2k is reduced. Therefore, the force required to slide the barrier 2 in the state where the barrier 2 is located at the moving position 2 (C) can be small. That is, the barrier can be slid with a light motion. The bottom of the concave surface 2h is
Since the click ball 5c does not fall out from the convex portion 3c and the click spring 4c is set to a depth such that the click ball 5c can be always urged to the barrier 2, the rattling of the barrier 2 can be suppressed. Next, a third embodiment of the present invention will be described with reference to the drawings.

In this embodiment, the urging means in the camera of the first embodiment has a click ball 5b and a click spring 4b.
Instead of the above, it is configured by only the spring 4d.

FIG. 11 is a perspective view of a slide type camera with a barrier according to the third embodiment, showing a state in which the barrier is removed. An iter spring 4d is provided on the front cover 3 by a screw 7 on the left side of the front cover 3 in the vicinity of the taking lens 6. The iter spring 4d is provided with a notch 9 so that when the iter spring 4d is pushed rearward, the iter spring 4d escapes along the cylindrical protrusion 3d. The operation of the third embodiment is similar to that of the first embodiment.

Next, a fourth embodiment of the present invention will be described with reference to the drawings.

In this embodiment, the urging means in the camera of the second embodiment has a click ball 5c and a click spring 4c.
Instead of the above, it is composed of only the spring 4e.

FIG. 12 is a perspective view of a slide type camera with a barrier according to the fourth embodiment, showing a state in which the barrier is removed. A convex portion 3e is provided on the front cover 3 in the vicinity of the taking lens 6 and on the left side toward the camera. An iter spring 4e is installed on the convex portion 3e with a screw 7. The notch 9 is provided in the iter spring 4e, and when the iter spring 4e is pushed downward, the columnar pin 8
The leaf spring 4e is designed to escape along this.

The operation of the fourth embodiment is similar to that of the second embodiment.

[Additional Notes] According to the embodiment of the present invention as described in detail above, the following configurations can be obtained. That is, (1) In a camera provided with a barrier that is movable in a direction intersecting the optical axis of the taking lens at a fully closed position that covers the front of the taking lens and a fully open position that does not cover the front of the taking lens. An urging means for constantly urging the barrier, an engaging portion provided on the barrier so as to engage the urging means at the fully closed position and the fully opened position, the fully closed position and the fully opened position. A camera with a barrier, comprising: a reducing means for reducing the amount of the barrier sliding resistance force generated by the urging means during the movement between the camera and the.

(2) In a camera having a movable barrier at a fully closed position for covering the front surface of the taking lens and a fully open position for opening the front surface of the taking lens, to engage with the barrier and to give a click. An elastic member for urging, an urging means composed of a click ball urged by the elastic member, and an engagement in which a click concave groove portion for positioning the barrier at the fully closed position and the fully opened position is formed. Part, and further, when moving between the fully closed position and the fully open position, the click ball after passing over the click groove so that the click ball has less biasing force than the time when the click ball goes over. A camera with a barrier, comprising: a relief means provided on the barrier, wherein a sliding surface with respect to the biasing means has a relief shape.

(3) The camera with a barrier described in (1) above, wherein the urging means is composed only of an elastic member.

[0028]

As described above, the slide-type camera with a barrier of the present invention is provided with the concave portion for reducing the amount of force applied to the abutting surface of the positioning means for positioning the barrier when sliding the barrier. It has the effect of lightening the action of sliding the barrier.

[Brief description of drawings]

FIG. 1 is a perspective view of a slide type camera with a barrier according to a first embodiment of the present invention in a fully opened state of the barrier.

FIG. 2 is a perspective view of the camera of FIG. 1 in a fully closed state of the barrier.

FIG. 3 is a perspective view of the camera of FIG. 1 with a barrier removed.

FIG. 4 is a transverse cross-sectional view taken along a plane passing through the boss portion 3b in the barrier fully closed state of the slide-type camera with a barrier according to the first embodiment of the present invention.

5 is a cross-sectional view taken along a plane passing through a boss portion 3b when the barrier of the camera of FIG. 4 is fully opened.

6 is a transverse cross-sectional view taken along a plane passing through a boss portion 3b in the barrier moving state of the camera of FIG.

FIG. 7 is a perspective view showing a second embodiment of the present invention with a barrier of a slide-type camera with a barrier removed.

8 is a perspective view of the barrier section in a fully opened state of the barrier when the camera of FIG. 7 is viewed from the front.

9 is a perspective view of the barrier section in a fully closed state of the barrier when the camera of FIG. 7 is viewed from the front.

10 is a perspective view of the barrier section in a barrier moving state when the camera of FIG. 7 is viewed from the front.

FIG. 11 is a perspective view of a slide type camera with a barrier according to a third embodiment of the present invention with the barrier removed.

FIG. 12 is a perspective view of a slide type camera with a barrier according to a fourth embodiment of the present invention with the barrier removed.

FIG. 13 is a transverse cross-sectional view taken along a plane passing through the boss portion 3b in a fully open state of the barrier-type camera with a slide according to the related art.

FIG. 14 is a cross-sectional view taken along a plane passing through the boss portion 3b in a state where the barrier of the camera of FIG. 13 is fully opened.

FIG. 15 is a transverse cross-sectional view taken along a plane passing through the boss portion 3b in the barrier moving state of the camera of FIG.

[Explanation of symbols]

 1 ・ ・ ・ ・ ・ Lens barrel 1 (A) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Lens barrel retracted position 1 (B) ・ ・ ・ ・ ・ Lens mirror Cylinder protruding position 2 ・ ・ ・ Barrier 2 (A) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Barrier closed position 2 (B) ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Barrier open position 2 (C) ・ ・ ・ ・ ・ ・ ・ ・ Barrier moving position 2d, 2f, 2i, 2j ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Barrier recess 2e ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Surface 2g, 2h ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Concave surface 2k ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Click rail 3 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Front cover 3a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Barrier Rail groove 3b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Boss portion 3c, 3e ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Convex portion 3d ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Cylinder convex portion 4b, 4c ・ ・ ・..... Click springs 4d and 4e・ ・ ・ ・ ・ ・ ・ ・ Itabane 5b, 5c ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Click ball 6 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Shooting lens 7 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・Screw 8 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Pin 9 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Notch O ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Photographic lens optical axis

Claims (3)

[Claims] 1. A camera having a movable barrier at a fully closed position for covering the front surface of the taking lens and a fully open position for opening the front surface of the taking lens, wherein a biasing force for elastically contacting the barrier is applied. Locking means provided on the barrier so as to engage with the locking means at the fully closed position and the fully open position, and a movement range between the fully closed position and the fully open position. In the camera with the barrier, the deactivating portion provided on the barrier between the engaging portions so as to deactivate the urging force. 2. The camera with a barrier according to claim 1, wherein the locking means includes a spherical member and an elastic member that presses the spherical member toward the barrier. 3. A camera having a barrier that is movable in a direction intersecting the optical axis of the taking lens at a fully closed position that covers the front of the taking lens and a fully open position that does not cover the front of the taking lens. , A click means for positioning the barrier at the fully closed position and the fully open position, and a pressure provided in a moving range between the fully closed position and the fully open position so as to reduce the pressure by the click means. A camera with a barrier, comprising: a reducing means.