JPH0384534A - Optical system device - Google Patents

Abstract

PURPOSE:To facilitate reference positioning by providing a 1st and a 2nd abutting member. CONSTITUTION:When a 1st moving frame 4 moves in one direction in a scanning area, i.e. toward the 1st abutting member 21, the interval between the 1st moving frame 4 and a 2nd moving frame 5 increases gradually, so the 1st moving frame 4 and 2nd moving frame 5 never collide against each other. Then when the 1st abutting member 21 stops by abutting on the 1st moving frame 4, the 2nd moving frame 5 also stops. Further, when the 2nd moving frame 5 moves in the reverse direction in the scanning area, i.e. toward the 2nd abutting member 22, the interval between the 1st moving frame 4 and 2nd moving frame 5 decreases gradually, but when the 2nd moving frame 5 stops by abutting on the 2nd abutting member 22, the 1st moving frame 4 and 2nd moving frame 5 do not abut on each other. consequently, the reference positioning is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to optical system devices mainly used in copying machines and the like. The present invention relates to a wire-driven optical system device having a first moving frame and a second moving frame.

Indigo rice zapin distortion on the contact glass of conventional copiers! ! A device having a wire-driven optical system that scans an original with a moving mirror is widely known. As shown in FIG. 3, this wire-driven optical system device includes a light source (7a) that scans an original (not shown) on a contact glass (1).
and a first moving frame (4) provided with a mirror (7b);
A second movable frame (5) provided with a mirror (8) for adjusting the optical path length that guides the light from the lens (7b) to an imaging lens (not shown) is provided in the copying machine case (10). In addition,
Set the scanning start position to the home position (2) in the scanning area.
The scanning end position is the return position (3〉).As shown in Fig. 4, the first moving frame (4〉) is fixed to the wire (9) at both ends, and the second moving frame (5) is fixed to the wire (9) at both ends. A wire (9) is connected to a movable pulley (16) provided in the
〉 is wrapped. Therefore, depending on the movement of the wire (9), the first . The second moving frame (4) (5) moves, the wire (9)
When the moving frames (4) and (5) stop, the moving frames (4) and (5) also stop. In other words, if one of the moving frames (4) and (5) stops, the other also stops. A wire (
9) is wound up, the first moving frame (4) and the second moving frame (5) move to the home position (2) at a speed ratio of 2:1.
) side toward the return position (3) side (Figures 3 and 4), that is, the first moving frame (4
) and the second moving frame (5) scan and move while maintaining a positional relationship in which the optical path length from the mirror (7b) to the imaging lens is always constant.

However, when the wires (9) connecting the movable frames (4) (5) are stretched or when the wires are replaced, each movable frame (4) (5) must be kept constant in order to keep the optical path length constant.
) must be aligned.

This reference alignment requires a lot of time and effort.

Therefore, various types of wire-driven optical system devices have been proposed to facilitate reference alignment.

For example, as shown in FIG. 5, the inner surface of the copying machine case (10) on the home position side is a fixed fourth reference surface (14), and the second moving frame (5) is attached to this fourth reference surface (14). Third
The reference surface (13) is brought into contact with the second reference surface (12) of the second moving frame (5) and the first reference surface (11) of the first moving frame (4).
The reference positioning of each moving frame (4) and (5) is performed by bringing them into contact with each other (see Japanese Patent Laid-Open No. 62-99741).The dotted lines indicate the optical path of light from the original. .

Furthermore, in Japanese Patent Application Laid-Open No. 61-77834, a contact member is provided on the return position side of the copying machine main body to contact the first moving frame and the second moving frame, respectively, and each moving frame is brought into contact with this contact member. An apparatus has been proposed in which the reference positioning is performed by bringing the two parts into contact with each other.

However, according to the former device, if each moving frame exceeds the home position and runs out of control during return due to erroneous detection of the home position, etc., the fourth reference plane, the first moving frame, and the second moving frame There is a problem in that the movable frame collides with the movable frame at the same time, and both movable frames are damaged. Additionally, if each moving frame goes out of control beyond the return position during scanning, the first moving frame collides with optical system components such as a scan motor that are installed at a position beyond the return position.
There is a problem in that this component and the first moving frame are damaged.

In the latter device, as with the former, if the optical system goes out of control beyond the home position during return, the first
There is a problem in that the moving frame collides with components located beyond the home position, resulting in damage.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide an optical system device that can easily perform reference positioning and prevent damage to each moving frame and other optical system components.

In order to achieve the above-mentioned object of "i", in the present invention, a first moving frame and a second moving frame that scan a scanning area and a second moving frame that move in one direction of the scanning area are different from the preceding first moving frame. The distance between the preceding second moving frame and the following first moving frame gradually increases, and the distance between the preceding second moving frame and the following first moving frame gradually increases in the opposite direction of the scanning area. In the optical system device, the scanning area is moved in the one direction of the scanning area, and is configured such that when either one of the first moving frame and the second moving frame stops, the other also stops. A first abutting member is provided at a position beyond the end of the scanning area and beyond the scanning area to abut the first moving frame to stop the movement of the first moving frame, and the end of the scanning area in the opposite direction is provided. a second contact that stops the movement of the second moving frame by contacting the second moving frame in a state where the first moving frame does not contact the second moving frame at a position beyond the scanning area; Further, an elastic member may be provided on the first abutting member and the second abutting member.

According to this configuration, when the first moving frame moves in one direction of the scanning area, that is, toward the first abutting member, the interval between the first moving frame and the second moving frame gradually decreases. Since the first movable frame and the second movable frame do not collide with each other, when the first movable frame comes into contact with the first contact member and stops, the second movable frame also stops. Furthermore, when the second moving frame moves in the opposite direction of the scanning area, that is, toward the second abutting member, the distance between the first moving frame and the second moving frame gradually narrows; When the second moving frame comes into contact with the second contact member and stops, the first moving frame and the second moving frame are not in contact with each other, so the first moving frame and the second moving frame do not collide.

IT Team Hereinafter, embodiments of the present invention will be described based on the drawings. Incidentally, the same parts as in the conventional example shown in FIGS. 3 to 5 are given the same reference numerals, and the explanation thereof will be omitted.

1 and 2 show the second moving frame (5
) is in contact with the second contact member (22) and the first
The moving frame (4) is shown in a state in which it is in contact with the first contact member (21). A second abutting member (22) is provided at a position beyond the home position (2) and out of the scanning area, and a first abutting member (22) is provided at a position beyond the return position (3> and out of the scanning area). 21), the configuration is similar to the conventional example shown in FIGS. 3 and 4.

Hereinafter, a method for performing reference positioning of each moving frame (4) (5) using each contact member (21) (22) will be explained.

As shown in Figures 1 and 2, the copying machine case (10)
A first abutting member (21) and a second abutting member (
22) is provided integrally with the copying machine case (10). The second contact member (22) is at the home position (2)
As shown in FIG. 1, the second movable frame (5) is positioned outward (to the left in FIG. 1) of the Position (3
) (to the right in FIG. 2), and is located so that the first moving frame (4) can come into contact with it without any problem, as shown in FIG.

First, as shown in FIG. 1, the wire (9) is wound around the movable pulley (16), and the second moving frame (5
) are in contact with each other. Next, connect the first moving frame (4) to the wire (
9), but is brought into contact with the first contact member (21) as shown in FIG. While keeping the first movable frame (4) in contact with the first contact member (21), move only the first movable frame (5) to the right so that the optical system can be properly focused. The first moving frame (4) is moved to determine a predetermined positional relationship between the moving frames (4) and (5), and the first moving frame (4) is fixed to the wire (9). At this time, the second moving frame (5) moves to the second abutting member (
22) from the position in contact with the motor (6) (hereinafter referred to as "set movement amount") is determined from the rotation speed of the motor (6), etc.

Note that when the second movable frame (5) is brought into contact with the second abutment member (22), the space between the second movable frame (5) and the first movable frame (4) and the first movable frame (4) ) and the home position (2).

Even if the adjustment is made in this way, the first moving frame (4> and the second moving frame (5) Since the positional relationship between the wires and wires may be out of alignment, the reference positioning is performed as follows during the second and subsequent adjustments.First, the second moving frame (5) is brought into contact with the second abutting member (22).The wire (
9), the first moving frame (4) released from the i-th contact member (
21), the second moving frame (5) is moved in the direction of the first abutting member (21) by the set moving amount. By fixing the first movable frame (4) to the wire (9), a predetermined positional relationship between the movable frames (4) and (5) is reproduced.

As described above, the first contact member (21) and the second contact member (22) not only function as reference surfaces, but also move beyond the home position (2) and return position (3) to each moving frame ( 4) When (5) goes out of control, it stops the movement of each moving frame by coming into contact with the preceding moving frame.As a result, collision between moving frames (4) and (5), and damage to the scan motor (6), etc. It functions to prevent collision between the optical system components and the moving frame (4), thereby preventing damage to each part.

As mentioned above, when the first movable frame (4) abuts the first abutting member (21) or the second movable frame (5) abuts the second abutting member (22), the contact occurs. The contact parts and other parts may receive a large impact, which may cause the predetermined positional relationship to be distorted or other failures to occur.Therefore, the first contact member (21) and the second contact member (22) For example, by attaching a cap made of an elastic material such as rubber to a bottle made of a hard-to-deform metal, etc., it is preferable to provide an elastic member on the contact members (21) (22) and the moving member (4). (5) It is possible to alleviate the impact between

As explained above, according to the present invention, even if each moving frame goes out of control beyond its return position, the first moving frame is stopped by coming into contact with the first abutting member. Even if each moving frame goes out of control beyond its home position, the first moving frame comes into contact with the first abutting member and is stopped before the first moving frame and the second moving frame come into contact with each other. Therefore, damage to each moving frame and other optical system components can be prevented.

Further, the first abutting member and the second abutting member can be used as reference surfaces, and the reference positioning can be easily performed by bringing the first moving frame and the second moving frame into contact with these abutting members. be able to.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are both schematic plan views for explaining one embodiment of the present invention. FIG. 3 is a schematic sectional view for explaining the operation of the conventional example, and FIG. 4 is a schematic plan view thereof. FIG. 5 is a schematic sectional view showing the main parts of another conventional example. (4>--First moving frame, (5)--Second moving frame. (21>--First abutting member, (22)--Second abutting member.

Claims (2)

[Claims] (1) When the first moving frame and the second moving frame scan the scanning area, the interval between the preceding first moving frame and the following second moving frame gradually increases in one direction of the scanning area. The first moving frame moves so as to spread out, and moves so that the interval between the preceding second moving frame and the following first moving frame gradually narrows in the opposite direction of the scanning area. and an optical system device configured such that when either one of the second moving frames stops, the other also stops, beyond the end of the scanning area in the one direction and at a position outside the scanning area. A first abutting member that comes into contact with the first moving frame to stop the movement of the first moving frame is provided, and the first abutting member is provided at a position beyond the opposite end of the scanning area and outside the scanning area. An optical system device comprising: a second abutment member that abuts the second movable frame to stop movement of the second movable frame in a state where the movable frame does not abut the second movable frame. (2) The optical system device according to claim 1, wherein an elastic member is provided on the first abutting member and the second abutting member.