JPS5810756A - Driving controlling mechanism for optical member of copying machine - Google Patents

Abstract

PURPOSE:To use only one kind of stop controlling system independently of the number of changed copy magnifications to facilitate the assembling and the adjustment, by detecting the slide of a pulley due to the contact of an optical member to a stopper member by a slide detecting part to cut off the driving force of the driving pulley. CONSTITUTION:A carriage 2 is moved by the normal rotation of a driving motor 21; and when the end part of the carriage 2 is brought into contact with a stopper member 10a and a lens unit 1 is stopped in an unmagnification position, a part 16a of a wire 16 is wound around a driving pulley 20, and a lever 24a is slided clockwise with a supporting shaft 23a as the fulcrum, and thus, a microswitch SW3 is turned on to cut off the power supply to the driving motor 21. Meanwhile, when the carriage 2 is brought into contact with a stopper member 10b by the reverse rotation of the driving motor 21 and the unit 1 is stopped in the reduction position, a lever 24b is slided counterclockwise, and a microswtich SW4 is turned on to cut off the power supply to the driving motor 21.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a drive control mechanism for driving optical members such as lens units and mirrors that are supported so as to be linearly movable back and forth to a plurality of positions, and then stopping them at the positions in a copying machine. It is.

BACKGROUND OF THE INVENTION In general, in copying machines capable of changing copying magnification, magnification changing methods can be divided into the following three types.

(1) Method of changing the conjugate distance by changing the lens unit position and the mirror position (11)
A method of changing the lens unit position and adding an auxiliary lens for changing the magnification to this lens unit (the conjugate distance does not change) (Ill1 Method of using a zoom lens or converting the lens unit itself) , (In the method of Ill, it is necessary to move the lens unit and the mirror or only the lens unit to a plurality of positions depending on the magnification.

Conventionally, as a drive control mechanism for optical members such as lens units and mirrors, the optical member is moved by a motor, and when the optical member comes into contact with a stopper member provided at a desired position corresponding to the magnification, the optical member is activated. It was common to use a switch member to cut off the power to the motor (
(Refer to Utility Model Application Publication No. 153231/1983).

However, in such a drive control mechanism, a stopper member and a switch member must be provided for each stop position of the optical member, and both members stop the optical member at an accurate position, and when the optical member stops (the stopper member It was necessary to adjust the two members in a correlated manner so that the switch member would work and cut off the current when the switch member came into contact with the main body.

Further, the copying magnification must be changed in various ways depending on the country of destination and the user's requests, even if the copying machine is of the same model.

For example, in the United States, reduction is common (Xo, 64), while in Japan and European countries (Xo, 7)
or (Xo, 8) is common.

Even for such a change in magnification, it is necessary to adjust and adjust all the switch members in a correlated manner as described above.

That is, the conventional drive control mechanism has the disadvantage that it must be provided with stopper members and switch members as many as the number of copying magnifications, and that assembly and adjustment are extremely complicated.

The present invention has been made in view of the above-mentioned drawbacks, and its purpose is to provide only one type of stop control system regardless of the number of changes in copy magnification, and to provide two stop position detection members. An object of the present invention is to provide a drive control mechanism for optical members in a copying machine, which requires only one piece, is easy to assemble and adjust, and can reduce costs.

! 1. In order to achieve the above objects, the drive control mechanism according to the present invention includes an optical member supported so as to be linearly movable back and forth;
A pair of pulleys are provided at both ends of the reciprocating direction of the optical member so as to be able to swing on a plane parallel to the movement path, and a drive pulley that can be driven in forward and reverse rotation is provided between the two pulleys. ,
A wire wound around both pulleys and a drive pulley and fixed to the optical member; an urging member for urging both pulleys in a direction to tension the wire; and a biasing member for stopping the optical member at a desired position. is provided with a plurality of stopper members provided on the movement path of the optical member, and a swing detection member that detects the swing of both pulleys, and detects the swing of the pulley due to the contact of the optical member with the stopper member. The detection member detects this and cuts off the driving force of the drive pulley.

Therefore, by simply providing the stopper member at a desired position corresponding to the copying magnification, it is possible to accommodate various changes in copying magnification without changing the swing detection member or the stop control system.

Embodiment FIGS. 1 to 6 show the first embodiment of the drive control mechanism according to the present invention.
An example is shown. This first embodiment has two copying magnification functions: equal magnification and reduction.

The lens unit (1) is attached to the carriage (2) with the band (4
), and the guide shaft (
6) is supported so as to be linearly reciprocatable, and the other side is supported by a guide roller (7) provided movably on a guide rail (8). Stopper member (10a
) and (10b) are for stopping the lens unit (1) at the same-magnification copying position and the reduced-size copying position, and the equal-strength stopper member (10a) is located on the movement path of the lens unit (1), respectively, and the carriage (2). The reduction stopper member (10b) is fixed to a frame (not shown) so that the rear end of the carriage (2) comes into contact with the front end of the carriage (2) in FIG.

The drive boo IJ (20+) is fixed to the output shaft of a drive motor (21) which is installed on a mounting plate (151) and is rotatable in forward and reverse directions.

A pair of nohuri (22a) and (22b) are attached to the mounting plate (1
It is rotatably attached to levers (24a) and (24b) that are swingably provided on support shafts (23a) and (23b) on the lens unit 9, and is located at both ends of the reciprocating direction of the lens unit (1). . This pair of pulleys (22a), (22b
) and the drive pulley ■ are wound with a wire (16),
A protrusion (3) of the carriage (2) of the lens unit (1) is fixed to a part of the wire (16). In other words, when the drive motor (211) is rotated forward, the drive pulley
rotates in the counterclockwise direction in FIG.
16) moves counterclockwise, and in synchronization with this movement, the lens unit (1) moves toward the front (to the left in FIG. 2) on the guide shaft (6) and guide rail (8). on the other hand,
When the drive motor (21) is reversed, the lens unit (1) moves backward (to the right in FIG. 2), contrary to the above.

Further, the levers (24a) and (24b) are connected to the support shaft (23).
Tension spring (2) wound around a) and (23b)
counterclockwise direction [lever (24a)] 9clockwise direction [lever (24b)) at sa) and (25b) respectively.
The wire flB is elastically biased to prevent the wire flB from loosening. □ The micro switches (SW3) and (SW4) are for detecting the swinging of the levers (24a) and (24b), respectively. ) protrusion (25a), (
25b). That is, the drive motor (2D
When the end of the carriage (2) comes into contact with the stopper member (10a) and the lens unit (1) stops at the same magnification position, part of the wire (16) (16a) rotates in the normal direction.
) is wound around the drive pulley ■, the lever (24a) swings together with the pulley (22a) in the clockwise direction in FIG. The spring (27a) is connected to the micro switch (SW
3) Turn on. This signal causes the drive motor (21) to be de-energized. On the contrary, the drive motor c!
By reversing D, the other end of the carriage (2) comes into contact with the stopper member (10b) and the lens unit (
1) stops at the reduced position (see Figure 4), the wire O
Part of e (16b) 7! l (caught up in the drive pulley ■,
The lever (24b) is attached to the support shaft (2) together with the pulley (22b).
3b) as a fulcrum and swings counterclockwise in Fig. 4,
The leaf spring (27b) pressed by the protrusion (25b) turns on the microswitch (SW). This signal causes the power supply to the drive motor (211 to be cut off).

In addition, at both the same magnification and reduction position, the levers (24a) + (24b) are connected to the pulleys (22a), (2
2b) together with tension springs (26a), (2
6b) and leaf springs (27a), (27b), biasing forces in the counterclockwise and clockwise directions are applied, resulting in displacement of the lens unit (1), in other words, stopper members (10a), (10b). ).

Furthermore, an auxiliary lens (to) is attached to the lens unit (1) (see FIG. 5). This auxiliary lens
is designed to retreat from the optical path when the magnification is the same, and to enter the optical path when the magnification is reduced.

The frame l31) holds the auxiliary lens ■, and is rotatable via an axis (to) on the auxiliary lens carriage (to) attached to the side of the lens unit (1), that is, the auxiliary lens ■ is in the optical path. It is installed so that it can move forward and backward, and a pulley (to) is fixed to the shaft (to). Then, the pulley (to) connects one end of the spring +41 inserted into the annular recess (9) to the hole (
By locking the other end to the hole (end) of the frame body (311), it is biased counterclockwise in FIG.
The shaft (41) has one end fixedly wound around a pulley in a counterclockwise direction in FIG. 1', and the other end fixedly fixed to a frame or the like.

The frame body (9) is biased by a spring wound around the shaft in the clockwise direction in FIG. 5, that is, in the direction in which the auxiliary lens ■ enters the optical path. It is regulated by the pin ■ (to) coming into contact with the protrusion (to) of the pulley (to).

In the above configuration, when the lens unit (1) moves to the same magnification position as shown in FIG. The auxiliary lens (2) rotates counterclockwise in FIG. 1, and the protrusion urges the pin, causing the auxiliary lens (2) to rotate counterclockwise and retreat from the optical path.
- On the other hand, when the lens unit (1) moves to the reduced position as shown in FIG. 4, the IJ (35) is biased by the spring (40) to the extent that the wire (41) is loosened.

The auxiliary lens (A) rotates clockwise in Fig. 4 to wind up the wire (41), and the protrusion □□□ releases its engagement with the pin ■. The beam rotates clockwise and enters the optical path.

Next, a control circuit of this drive control mechanism is shown in FIG.

Switch (SW□) is for equal size selection, switch (SW2)
are for reduction selection and are connected to the input ports (2) and (4) of the microcomputer, respectively, and their on signals are input from the output ports (2) and (2) to one terminals of the AND circuits (43a) and (43b). The above micro switch (sw)
, (sw4) is the input port ■.

(4) and the other terminals of the AND circuits (43a) and (43b) via contacts (44a) and (44b). And an AND circuit (431).

The output of (43b) is input to the motor drive circuit (451).

In addition, an inverter (46a) is installed at the output ports ■ and ■.

(46b), the same magnification display lamp (Ll) and reduction display lamp (L2) are connected, and each lens unit (
1) lights up to indicate that it is at the same magnification position or reduced position.

In other words, the equal magnification selection switch (SW, ) is normally turned on, and when the main switch is turned on, the output port ■
An equal magnification selection signal is input from the AND circuit (43a). At this time, if the lens unit (1) has moved to the same magnification position as shown in FIG.
Since the microswitch (SW3) is on, no signal is input to the other terminal of the AND circuit (438), and the drive motor (el) remains stopped.

Also, when the main switch is turned on, the lens unit (1
) is stopped at a position other than the same magnification position, the micro switch (SW3) is turned off and the AND circuit (+3a
) is activated and its output signal is input to the motor drive circuit (49), causing the drive motor (21) to rotate in the normal direction. With this normal rotation, the lens unit (1) moves to the same magnification position and stops, and the above-mentioned The micro switch (
SW3) is turned on, the output of the AND circuit (43a) is stopped, and the power to the drive motor Cυ is cut off. Then, the state becomes ready for copying operation.

On the other hand, when the reduction selection switch (SW2) is turned on, the reduction selection signal is inputted from the output port ■ to the AND circuit (43b), and the microswitch (SW4) is turned off.
The AND circuit (43b) is activated, and its output signal is input to the motor drive circuit (451) to reverse the drive motor C+t+.This reversal moves the lens unit (1) to the reduced position and stops [stopper member (10b)], the microswitch (5w4) is turned on by the swing of the lever (24b), the output of the AND circuit (43b) is stopped, and the power to the drive motor (2υ is cut off). In this state, reduction copying is possible.

In addition, in order to change the reduction magnification in the present invention, it is sufficient to simply move the stopper member (10b) to a desired position, for example, to the position shown by the dotted chain line in FIG. In this case, there is no need to change the drive pulley (2), pulleys (22a), (22b), etc., or the control circuit.

7 to 10 show a second embodiment. In this embodiment, the copying magnification is equal to, reduced [1], and reduced [2], and the pulleys, wires, etc. that are the drive control means for the lens unit (1) are the same as those in the first embodiment. Yes, the explanation will be omitted.

The stopper member for reduction [2] of the borrowed stopper member (5
1) is a carriage (2) on the moving path of the lens unit (1).
) are installed so that their ends (2a) and (2b) are in contact with each other. The stopper means ω for reduction [1] is installed between the stopper members ωi, (51+), and the bearings tn,
(A stopper member (57a) is attached to the support shaft (to) which is rotatably provided at 531.

(57b) is rotatably mounted. The stopper members (s7a) and (57b) are springs respectively)
is biased in the counterclockwise direction and clockwise direction in FIG.
9b).

In addition, the pin (56) provided at the end of the support shaft (to) is
It is rotatable within the groove (541), and the support shaft (551) is biased in the clockwise direction in FIGS. Groove (541
The stopper members (57a) and (57b) are regulated by contacting one end thereof, and at this time, the tips of the stopper members (57a) and (57b) are
) ends (2a) and (2b) enter into the reciprocating path.

In addition, the plunger of the solenoid (61) is connected to the support shaft (to), and by turning on the solenoid (61),
The support shaft rotates counterclockwise in FIG. 8 against the spring force of the spring, and the stopper members (57a), (5
7b) The acid end is the end of the carriage (2) (2a), (2b)
)7) Evacuate from the reciprocating route. However, in any rotation position, the stopper members (s7a), (57b)
The rear end remains in contact with the positioning parts (sc+a) and (59b).

On the other hand, the control circuit of this drive control mechanism is as shown in FIG. 10, and is basically the same as that shown in FIG.
Reduction (1) and (2) selection switch (SW2a)
, (5W2b) are installed in parallel with the equal-magnification selection switch (SWl), and display lamps (L2a) and (L2b) for reduction (1') and (2) are added, and an inverter is connected to the output port (6). (Solenoid (61) via 4η
connected. In addition, the output of the selection switch (SW□) is input from the output port (4) to one terminal of the AND circuit (43a), and the output of the selection switch (SW2a) is input from the output port (4), +5) to one terminal of the AND circuit (43a). Circuit (43a
), (43b) and (7) are input to one terminal, and the selection switch (SW2b) D output is input from the output port (5) to one terminal of the AND circuit (43b). Furthermore, the first
The microswitches (SW3) and (SW4) shown in the example
) are connected to the other terminals of the theand circuits (43a) and (43b) via contacts (44a)' and (44b).

In the above configuration, when the lens unit (fl)c is at the same magnification, it moves to the left in FIG.
SW3) is turned on. When it is reduced (2a), it moves to the right and is positioned by the stopper member 61), and the microswitch (SW4) is turned on in the same way. When the lens unit (1) moves from the same magnification position to the reduction [2a position] or vice versa, the selection switch (SW2b) or (SW, ) is turned on and the solenoid (6
1) is turned off, and the stopper members (s7a) and (57b
) will be evacuated from the movement path of the carriage (2).

On the other hand, to stop the lens unit (1) at the reduced position (1a), turn off the solenoid (61), rotate the support shaft (to) clockwise in FIG.
a) and (57b) enter the moving path of the carriage (2). When the lens unit (1) is moved from the reduced [2a position], first move it from the end w of the carriage (2)
a) abutting against the cast collar member (57b) and retracting the stopper member (57b) in the counterclockwise direction in FIG. 7;
When moving further to the left, the end (2a) comes into contact with another stopper member (57a) and is positioned, turning on the microswitch (SW3). Opposition I
When moving from the same magnification position, move the carriage (2)
The end (2b) of the stop lever member (57a) comes into contact with the stopper member (57a), and when the stop lever member (57a) is retracted clockwise in FIG. It is positioned by coming into contact with the stopper member (57b), and the microswitch (SW, i) is turned on.

In addition, to move from the reduction [1a position] to the same magnification position or the reduction [2a position], use the selection switch (SWl) or (SW2
b) is turned on, the solenoid (61) is turned on, the stopper members (57a) and (57b) are retracted from the movement path of the carriage (2), and the drive motor (21) is rotated forward or reverse. However, at this time, the stopper member (
The spring force of the leaf spring (27a) or (27b) shown in the first embodiment acts on 57a) or (57b), so that the end (2a) or (2b) of the carriage (2) is pressed against it. Therefore, the electromagnetic force of the solenoid (61) causes the stopper member (57
It is not easy to rotate and retreat a) and (57b).

Therefore, for example, if you want to move to the same magnification position, the drive motor (2
1) is reversed, and then the solenoid +61) is turned on to retract the stopper members (s7a) and (57b)-, and the drive motor (21) is rotated in the normal direction.

Incidentally, in each of the above embodiments, the magnification is changed in the case of reduction, but the same structure can be applied even if the magnification is changed in enlargement. Further, the object of drive control may be not only the lens unit but also a mirror in the case of a model that changes the optical path length according to the change in magnification.

Effects As is clear from the above explanation, the present invention allows the optical member to be stopped at a desired position using a plurality of stopper members provided on the reciprocating path of the optical member, and in conjunction with this stopping, the reciprocating movement of the optical member is stopped. Since either one of the pulleys provided at both ends of the direction is made to swing, this swing is detected, and the driving force of the drive pulley is cut off, making it possible to use one type of stop control system regardless of the number of changes in the copying magnification. All that is needed is to prepare the stop position, and the stop position detecting means only needs to be two devices that detect the swinging of a pair of pulleys.Moreover, the stop position can be adjusted independently of the stopper member and the swing detecting member. This is extremely easy. That is, according to the present invention, the number of parts can be reduced, assembly and adjustment can be facilitated, and costs can be reduced.

[Brief explanation of the drawing]

1 to 6 show a first diagram of a drive control mechanism according to the present invention.
1 is a perspective view, FIG. 2 is a plan view showing the same magnification stop position, FIG. 3 is a right side view thereof, FIG. 4 is a plan view showing the reduction stop position, and FIG. 5 C 6 is an exploded perspective view of the auxiliary lens attachment mechanism, and FIG. 6 is a control circuit diagram. 7 to 10 show a second embodiment, in which FIG. 7 is a front view, FIG. 8 is a side view, FIG. 9 is a perspective view of essential parts, and FIG. 10 is a control circuit diagram. (1)...Lens unit, (6)...Guide shaft,
(ioa). (10b)... Stopper member, (161... Wire, ■... Drive pulley, (21)... Drive motor, (
22a), (22b)-7' stopper means, (57a)
, (57b)...Stopper member, in...Solenoid, (SWl), (SW2), (SW2a). (SW2b) ...Magnification selection switch, (5w3)
, (sVv4)...Micro switch (swing detection member). Patent applicant Minolta Camera Co., Ltd. Agent
Patent attorney Hao Aoyama and 2 others

Claims (1)

[Claims] 1. An optical member supported so as to be linearly reciprocated, and a pair of pulleys provided at both ends of the optical member in a reciprocating direction so as to be swingable on a plane parallel to the movement path. , a drive pulley arranged between both pulleys that can be driven in forward and reverse rotation; a wire wound around both pulleys and the drive pulley and fixed to the optical member; a biasing member that biases the pulley; a plurality of stopper members provided on a movement path of the optical member to stop the optical member at a desired position; and a swing detection member that detects swing of both the pulleys. 1. A drive control mechanism for an optical member in a copying machine, characterized in that a swing detection member detects swinging of a pulley due to contact of an optical member with a stopper member, and cuts off the driving force of the drive pulley. 2. A drive control mechanism for an optical member in a copying machine according to claim 1, wherein the optical member is a lens unit.