KR200145759Y1 - A driving device of lens and mirror in a copying machine - Google Patents

Abstract

The present invention relates to an apparatus for driving a lens and a mirror of a copier as one drive motor.

One drive motor 51, a drive pulley 53 mounted on the shaft of the drive motor 51, and a rope wire 79 wound on the drive pulley are cyclically mounted on the copier main body so that they can move indefinitely. The first pulley 55, the second pulley 57 and the third pulley 59, the lens 69 moved between the driving pulley 53 and the first pulley 55, and the lens 69 ) And a support bar 71 for connecting the rope wire 79, a drive shaft 73 for guiding the movement of the support bar 71, and a cam rotating on the same axis as the third pulley 59. 61 and a third mirror base unit 65 provided with a cam rod 63 to reciprocate by receiving a driving force from the cam 61.

This makes the lens and the third mirror base unit reciprocate as one drive motor, and the third mirror base unit can adjust its movement amount by the shape of the cam.

Description

Copier's lens and mirror drive

The present invention relates to a lens and a mirror driving device of a copier, and more particularly, to a device for driving a lens and a mirror of a copier as one drive motor.

A conventional case will be described with reference to FIGS. 1 to 4.

Referring to FIG. 1, a lens and mirror driving apparatus of a conventional copier includes a copy lamp unit 11 including a copy lamp 1, a reflector 2, and a first mirror 3; A second mirror base unit (10) composed of a second mirror (4) reflecting the image reflected by the first mirror (3) and a third mirror (5) reflecting the image reflected from the second mirror; A movable lens (6) for receiving and refracting an image reflected by the third mirror (5); A third mirror base unit (12) composed of a fourth mirror (7) reflecting the image refracted by the lens (6) and a fifth mirror (8) reflecting the image reflected from the fourth mirror; The sixth mirror 9 reflects the image reflected from the fifth mirror, and the photosensitive member 21 receives the image reflected from the sixth mirror.

The lens 6 is driven by the lens drive motor 13. The third mirror base unit 12 is driven by the third mirror drive base unit drive motor 14. The forward movement of the lens 6 is sensed by the lens home position sensor 17. The forward movement of the third mirror base unit 12 is sensed by the mirror base home position sensor 16.

FIG. 2 shows the positional relationship between the lens 6 and the fourth and fifth lenses 7 and 8 at equal magnification 1: 1, from the original 23 to the lens 6 set on the table grass. The distance and the distance from the lens 6 to the furnace surface of the photosensitive member 21 are the same.

Fig. 3 shows the positional relationship between the lens 6 and the fourth and fifth lenses 7 and 8 at the time of magnification, wherein the distance from the original 23 set on the table grass to the lens 6 is the lens 6 It becomes shorter than the distance from to the furnace light emitting surface of the photosensitive member 21. The lens 6 moves in the original direction as compared with the back view, and the distance from the original to the lens is shortened. The lens then moves away from the mirrors 7, 8.

Fig. 4 shows the positional relationship between the lens 6 and the fourth and fifth lenses 7 and 8 at the time of the encapsulation. It becomes longer than the distance from to the furnace light emitting surface of the photosensitive member 21. The lens 6 moves in the opposite direction to the original compared to the equal backing, and the distance from the original to the lens becomes longer. The lens then comes close to the mirrors 7, 8.

As described above, the structure of the general copier and the movement of the lens and the fourth and fifth mirrors have been examined. As a result, since the mirror and the lens are driven as the respective driving motors, the device is complicated, and the accuracy of the enlarged and reduced is reduced. there was.

Accordingly, the present invention is to overcome the above-mentioned conventional problems, and an object of the present invention is to drive the lens and the fourth and fifth mirrors as one driving motor so that they are moved relative to each other.

As one example of a lens and mirror driving device of a copier for achieving the object of the present invention, a drive motor, a drive pulley mounted on the shaft of the drive motor, and a rope wire wound on the drive pulley can be infinitely moved. A first pulley, a second pulley and a third pulley mounted on the copier body so as to be circularly circulated, a lens moved between the driving pulley and the first pulley, a support bar connecting the lens and the rope wire, and the support; And a drive shaft for guiding the movement of the bar, a cam rotating on the same axis as the third pulley, and a third mirror base unit provided with a cam rod to reciprocate with the driving force transmitted from the cam.

By this configuration, the lens and the third mirror base unit are simultaneously moved as one drive motor.

1 is a block diagram showing a lens and a mirror driving device of a conventional copier

2 is an explanatory diagram showing a principle of equal driving of a lens and a mirror of a conventional copier;

3 is an explanatory diagram showing an enlarged driving principle of a lens and a mirror of a conventional copier;

4 is an explanatory diagram showing a principle of reduction driving of a lens and a mirror of a conventional copier;

5 is a block diagram of a lens and a mirror driving device of the copier according to the present invention

<Explanation of symbols for main parts of drawing>

1: copy lamp 2: reflector

3: first mirror 4: second mirror

5: third mirror 6: lens

7: fourth mirror 8: fifth mirror

9: sixth mirror 10: second mirror base unit

11 copy lamp unit 12 third mirror base unit

13: Lens Drive Motor 14: Third Mirror Base Drive Motor

16: home position sensor 17: lens home position sensor

21: photosensitive member 51: drive motor

53: driving pulley 55: first pulley

57: second pulley 59: third pulley

61: cam 65: third mirror base unit

67: compression spring 69: lens

71: support bar 75: tension spring

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. 5.

Referring to Figure 5, the lens and the mirror driving apparatus of the copier according to the present invention

One drive motor 51, a drive pulley 53 mounted on the shaft of the drive motor 51, and a rope wire 79 wound on the drive pulley are cyclically mounted on the copier main body so that they can move indefinitely. The first pulley 55, the second pulley 57 and the third pulley 59, the lens 69 moved between the driving pulley 53 and the first pulley 55, and the lens 69 ) And a support bar 71 for connecting the rope wire 79, a drive shaft 73 for guiding the movement of the support bar 71, and a cam rotating on the same axis as the third pulley 59. 61 and a third mirror base unit 65 provided with a cam rod 63 to reciprocate by receiving a driving force from the cam 61.

The cam 61 is represented in the form of a circle in the drawing, but its shape is the distance between the original and the lens, the distance between the lens and the photoconductor, the distance between the original and the photoconductor, the lens shift amount, the lens shift pulse, and the third mirror base unit. It is determined by the movement amount and the movement pulse of the third mirror base unit.

At the point where the support bar 71 is fixed to the rope wire 79, a tension spring 75 is installed on the rope wire to correct the amount of movement of the lens.

In addition, the spring 67 is also installed in the third mirror base unit 65 to correct the movement amount of the third mirror base unit 65.

By the above configuration, the lens and the mirror driving device of the copier of the present invention operate as follows.

When the drive motor 51 rotates, the drive pulley 53 mounted on the shaft of the drive motor 51 is rotated, and then the first pulley on which the rope wire 79 wound on the drive pulley is mounted on the copier main body. 55, the second pulley 57 and the third pulley 59 are infinitely moved.

Between the drive pulley (53) and the first pulley (55) allows the support bar (71) fixed to the rope wire (79) to reciprocate. This causes the lens 69 to reciprocate.

The cam 61 rotates on the same axis as the third pulley 59 to receive the driving force from the cam 61 so that the third mirror base unit 65 with the cam rod 63 reciprocates. do.

As described above, the lens and the mirror driving device of the copier according to the present invention allow the lens and the third mirror base unit to reciprocate as one driving motor, and the third mirror base unit can adjust the movement amount by the shape of the cam. Will be.

What has been described above is only one embodiment for implementing the lens and the mirror driving apparatus of the copier according to the present invention, the present invention is not limited to the above-described embodiment, which is claimed in the following utility model registration claims Without departing from the gist of the present invention, any person having ordinary knowledge in the field to which the present invention pertains may make various changes.

Claims (4)

One drive motor 51, a drive pulley 53 mounted on the shaft of the drive motor 51, and a rope wire 79 wound on the drive pulley are cyclically mounted on the copier main body so that they can move indefinitely. The first pulley 55, the second pulley 57 and the third pulley 59, the lens 69 moved between the driving pulley 53 and the first pulley 55, and the lens 69 ) And a support bar 71 for connecting the rope wire 79, a drive shaft 73 for guiding the movement of the support bar 71, and a cam rotating on the same axis as the third pulley 59. And a third mirror base unit (65) provided with a cam rod (63) for reciprocating by receiving a driving force from the cam (61). The method of claim 1, The shape of the cam 61 depends on the distance between the document and the lens, the distance between the lens and the photoconductor, the distance between the document and the photoconductor, the lens shift amount, the lens shift pulse, the shift amount of the third mirror base unit, and the shift pulse of the third mirror base unit. Lens and mirror drive device of the copier, characterized in that determined by. The method of claim 1, At the point where the support bar (71) is fixed to the rope wire (79), the lens and mirror driving device of the copier, characterized in that the tension spring (75) is installed on the rope wire. The method of claim 1, Lens and mirror drive device of the copier, characterized in that the spring (67) is provided in the third mirror base unit (65).