JPH0342775Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to an image reading device that reads an image drawn on paper on a paper support member, and particularly relates to an image reading device equipped with a reading sensitivity level check mechanism. It is related to.

(Problems to be Solved by the Invention) In this invention, the sensitivity level check member is always placed in an inactive position where it is difficult to get dirty, and is placed in an active position facing the reading member only when in use. The reading sensitivity level can be checked accurately, and the reading member and the sensitivity level checking member can be linked and changed to two positions, operative and inactive, by a single drive device, and the structure is simple. An attempt is being made to provide an image reading device that can reduce costs and downsize the device.

Structure of the invention (means for solving the problem) This invention was made by paying attention to the above-mentioned problems, and includes a frame 1 with a paper support member 2 and a frame 1 with a paper support member 2 spaced apart from the paper support member 2. and a support means 4 extending in the longitudinal direction of the paper support member 2, and a reading member 11 is disposed on the support means 4 so as to face the paper support means 2,
The reading member 11 is positioned between two positions: a reading position where the reading member 11 is close to the paper support member 2 and reads the image drawn on the paper 3 on the paper support member 2, and a retracted position where it is separated from the paper support member 2. A sensitivity level check member 14 is provided in the vicinity of the paper support member 2, and is located between two positions: an active position facing the movement area of the reading member 11 at the reading position, and an inactive position where it retreats from there. In order to change the position of the reading member 11 and the sensitivity level check member 14 in conjunction with the two positions, the frame 1 is provided with one drive device 18. The reading member 11 and the sensitivity level checking member 14 are connected through the driving transmission mechanism 19, so that the reading sensitivity level of the reading member 11 can be checked while the reading member 11 is located close to the sensitivity level checking member 14. It consists of

(Function) Therefore, in the image reading device of this invention, the driving device 18 moves the reading member 11 and the sensitivity level check member 1 through the motion transmission mechanism 19.
4 is simultaneously changed between two positions, and the reading sensitivity level of the reading member 11 is checked with the reading member 11 positioned close to the sensitivity level checking member 14.

(Example) Hereinafter, this invention will be described in detail based on an example in which this invention is embodied in a printer with an image reading device.

Now, in the printer of this embodiment, the second
As shown in the figure, left and right side plates 1a, 1 of the frame 1
A platen 2 serving as a paper support member is rotatably supported between support shafts 2a at both ends, and a printing paper 3 is rotatably supported around the outer periphery of the platen 2. and,
This platen 2 is rotated by a predetermined amount by a motor or the like (not shown) to feed the printing paper 3. A guide rod 4 and a guide rail 5 as supporting means are provided between both side plates 1a and 1b of the frame 1 so as to extend in parallel along the longitudinal direction of the platen 2 in front of the platen 2.
is supported by the erection.

A carriage 6 is movably supported on the guide rod 4, and a protrusion 6a that slidably engages with the guide rail 5 is provided at the front portion of the carriage 6.
A printing head 7 is mounted on the carriage 6, and its printing portion 7a is arranged opposite to the platen 2, as shown in FIG. A ribbon cassette (not shown) is installed on the frame 1, and a part of the ink ribbon 8 housed inside the ribbon cassette is exposed to the outside and is connected to the printing section 7a of the printing head 7 and the platen 2.
is located between. Then, the carriage 6 is moved along the longitudinal direction of the platen 2 on the guide rod 4 via the timing belt 10 supported by the timing pulley 9 by a motor or the like (not shown), and along with this movement, the print head 7 Thus, printing is performed on the printing paper 3 on the platen 2 via the ink ribbon 8.

A reading member 11 is fitted and supported on the guide rod 4 adjacent to the carriage 6 by a pair of support portions 11a located at a predetermined interval, and is movable in the longitudinal direction of the guide rod 4 integrally with the carriage 6. , can rotate around the guide rod 4. A reading section 11b is provided at the upper end of one side of the reading member 11, and is adapted to face the front surface of the platen 2 above the ink ribbon 8, as shown in FIG. The reading member 11 contains a light emitting element, a light receiving element, and a large number of optical fibers that connect them to the reading part 11b. Since it is described in No. 151797, it will be omitted.

An operating member 12 is disposed below the guide rod 4 so as to extend along the length of the guide rod 4, and is rotatably supported at both ends of the guide rod 4 at support portions 12a at both ends thereof. A two-pronged engagement piece 13 is protruded from the lower surface of one support portion 11a of the reading member 11, and is slidably engaged with the operating member 12 from the front and back. When the actuating member 12 is rotated by a pin 12b protruding from the outer surface of one of the supporting parts 12a, the reading member 11 is rotated via the engagement piece 13, as shown by the solid line in FIG. There is a reading position where the reading section 11b is close to the platen 2 and reads the image drawn on the print paper 3 on the platen 2, as shown in FIG. The position can be changed between the retracted position and the retracted position.

A sensitivity level check member 14 is rotatably supported on a support shaft 2a at the right end of the platen 2, and a reflection surface 14a having a predetermined light reflectance is provided on the outer periphery of a projection protruding from a part of the sensitivity level check member 14. At the same time, a gear 14b is partially formed on the outer periphery of the base. A rotary body 15 is rotatably supported in the frame 1 behind the sensitivity level check member 14 via a support shaft 16, and a fan-shaped gear 15a that meshes with the gear 14b on the sensitivity level check member 14 is provided at one end of the rotary body 15. is formed, and a pin 15b is provided protruding from the other end. When the rotating body 15 is rotated by the pin 15b, the sensitivity level check member 14 is rotated via the gears 15a and 14b, and the reflecting surface 14a is aligned with the reading member 11 as shown by the solid line in FIG. The position is changed between two positions: an active position facing the moving area at the reading position, and a non-active position where the reflective surface 14a retreats rearward from the active position, as shown by the chain line in the figure. .

A mounting plate 17 is fixed to the right side plate 1b of the frame 1 on the right side of the platen 2, and a single motor 18 as a driving device capable of forward and reverse rotation is supported on the side surface of the mounting plate 17. And this motor 18
and the pin 12b on the operating member 12 and the rotating body 1
A motion transmission mechanism 19 is provided between the pin 15b on the motor 18 and the operating member 12 and the rotating body 1 through the motion transmission mechanism 19 as the motor 18 rotates forward or reverse.
5 is rotated, and the reading member 11 and the sensitivity level check member 1 are rotated as shown by solid lines and chain lines in FIG.
4 is adapted to be changed in position in conjunction with the two positions.

That is, a connecting rod 20 is provided between the actuating member 12 and the rotating body 15 by inserting pins 12b and 15 into the fitting holes 20a at both ends so that the actuating member 12 and the rotating body 15 can be connected together.
b are rotatably fitted to each other, and an engagement hole 20b and a latching hole 20 are provided in the center of each.
c is formed. A drive lever 21 is rotatably supported on the mounting plate 17 via a support shaft 22.
An engagement protrusion 21a that engages with an engagement hole 20b of the connecting rod 20 is formed at its tip. motor 18
A plurality of gears 23, 24, 25, 26, 27,
A reduction gear system consisting of 28 is provided, and the motor 18
With forward or reverse rotation, the drive lever 21 is rotated counterclockwise or clockwise in FIG. 1 via this reduction gear system, and the connecting rod 20 is moved forward or backward. .

A toggle spring 30 constituting a toggle mechanism is hung between the latching pin 29 provided on the mounting plate 17 and the latching hole 20c on the connecting rod 20.
When the connecting rod 20 is moved forward or backward beyond the dead point of the toggle spring 30 as the motor 18 rotates forward or backward, the connecting rod 20
The biasing direction of the toggle spring 30 is reversed, and the reading member 11 and the sensitivity level check member 14 are placed in the reading position and active position shown by the solid line in FIG. The facing part is biased to rotate.

A regulating member 31 is protruded from the right side surface of the carriage 6 in correspondence with the reading member 11 so as to be eccentrically adjustable, and the reading member 11 and the sensitivity level check member 14 can be moved to the retracted position and the non-retracted position shown by the chain line in FIG. When the toggle spring 3 is rotated from the operating position to the reading position and the operating position shown by solid lines in the figure
When the zero dead point is exceeded, the regulating member 31 comes into contact with the reading member 11 to position and hold the reading member 11 and the sensitivity level check member 14 at the reading position and the operating position. Further, a stopper 32 is provided in the frame 1 corresponding to the rotating body 15, and the reading member 11 and the sensitivity level check member 14 are rotated in conjunction with each other from the reading position and the active position to the retracted position and the non-active position. When the toggle spring 30 passes the dead point, the stopper 32 comes into contact with the rotating body 15 to position and hold the reading member 11 and the sensitivity level check member 14 at the retracted position and the non-operating position.

A pair of limit switches 33 and 34 are provided in the frame 1 corresponding to the front and rear ends of the connecting rod 20.
is provided, and when the connecting rod 20 is moved forward or backward with the forward or reverse rotation of the motor 18 and the reading member 11 and the sensitivity level check member 14 are changed between the two positions, the connecting rod 20 is moved forward or backward. When the limit switch 33, 3 is moved by a predetermined amount,
4 is actuated by contact with the connecting rod 20 to stop the motor 18.

A cover 35 is removably attached to the frame 1 above the platen 2, and is designed to cover the sensitivity level check member 14, which is disposed in an inactive position, from above, as shown by the chain line in FIG. A wiping member 36 made of a brush or the like is provided on the inner surface of the cover 35, and the sensitivity level check member 1
4 is rotated to or from the inactive position, this wiping member 36 comes into sliding contact with the reflective surface 14a of the sensitivity level check member 14,
The reflective surface 14a is wiped clean.

Next, the operation of the printer with an image reading device configured as described above will be explained.

When this printer reads an image drawn on the printing paper 3 on the platen 2, the reading sensitivity level of the reading member 11 is checked prior to the reading operation. That is, first, the carriage 6 and the reading member 11 are integrally moved to the right along the guide rod 4 by a motor (not shown) via the timing belt 10 etc., and the reading member 11 is brought to a position corresponding to the sensitivity level check member 14. Placed. When the motor 18 is rotated forward in this state, the drive lever 21 is rotated counterclockwise in FIG. It engages with the front edge of the matching hole 20b, and thereby the connecting rod 2
0 is moved forward, and along with the movement, the actuating member 1
2, the reading member 11 is rotated clockwise from the retracted position shown by the chain line in FIG. Rotated clockwise.

When the biasing direction of the spring 30 is reversed after the dead point of the toggle spring 30 is exceeded, the connecting rod 20 moves forward regardless of the drive lever 21 due to the biasing force, and the reading head 1
1 comes into contact with the regulating member 31, and the reading member 11 and the sensitivity level check member 14 are positioned and held at the reading position and the operating position, as shown by solid lines in FIG. On the other hand, the forward movement of the connecting rod 20 causes the forward limit switch 33 to be activated, thereby stopping the motor 18. In this state, the reading portion 11b of the reading member 11 reads the reflected light on the reflective surface 14a of the sensitivity level checking member 14, and the reading sensitivity level is checked. The details of this checking method are described in the above-mentioned Japanese Patent Application No. 151797/1982, and therefore will not be described here. Thereafter, the reading member 11 and the carriage 6 are moved to the guide rod 4 by a motor (not shown).
The image drawn on the printing paper 3 on the platen 2 is read by the reading section 11b of the reading member 11.

After this reading operation is completed, when the motor 18 is reversed, the drive lever 21 is moved through the gears 23 to 28.
moves clockwise in FIG. is rotated counterclockwise from the reading position shown by the solid line in FIG. 3, and the sensitivity level check member 14 is rotated clockwise via the rotating body 15 from the operating position shown by the solid line in the same figure. Then, when the biasing direction of the spring 30 is reversed after the dead point of the toggle spring 30 is exceeded, the connecting rod 20 moves backward regardless of the drive lever 21 due to the biasing force, and the rotating body 15 is moved to the stopper 32. When they come into contact with each other, the reading member 11 and the sensitivity level checking member 14 are positioned and held at the retracted position and the inactive position, as shown by the chain lines in FIG. Furthermore, the backward movement of the connecting rod 20 activates the rear limit switch 34 and stops the motor 18.

Therefore, in this state, the carriage 6 and the reading member 11 are moved along the guide rod 4 in the longitudinal direction of the platen 2, and the printing section 7a of the print head 7 on the carriage 6 prints the ink on the platen 2 via the ink ribbon 8. Even if printing is done on printing paper 3,
The reading section 11 of the reading member 11 is in a retracted position due to ribbon debris generated during the printing operation.
There is no risk that b will get dirty. Furthermore, since the sensitivity level check member 14 disposed at the inactive position is covered by the cover 35, it is difficult for dirt to adhere to the reflective surface 14a.
Even if dirt adheres to the surface, it is reliably wiped off by sliding contact with the wiping member 36 as the sensitivity level check member 14 rotates.

Note that this invention is not limited to the above embodiment, and for example, a solenoid or the like may be used instead of the motor 18 of the above embodiment as a drive device for changing the position of the reading member and the sensitivity level check member between two positions. It is also possible to change the structure of each part arbitrarily and embody it without departing from the spirit of the invention.

Effects of the device As detailed above, this device has the sensitivity level check member placed in a non-active position where it is difficult to get dirty at all times, and also placed in an active position facing the reading member only when in use to improve the reading sensitivity. The level can be checked accurately, and the reading member and the sensitivity level check member can be linked and changed to two positions, operative and inactive, by a single drive device, and the structure is simple and cost-effective. This has an excellent effect in that it is possible to reduce the amount of energy used and to downsize the device.

[Brief explanation of the drawing]

FIG. 1 is a partially exploded perspective view of a printer with an image reading device embodying this invention, FIG. 2 is a partially plan view of the same printer, and FIG. 3 is a partially enlarged vertical sectional view. DESCRIPTION OF SYMBOLS 1... Frame, 2... Platen as paper support member, 3... Print paper, 4... Guide rod as support means, 11... Reading member, 11b
...Reading unit, 14... Sensitivity level check member, 14a... Reflective surface, 18... Motor as a drive device, 19... Movement transmission mechanism.

Claims (1)

[Claims for Utility Model Registration] 1. A frame 1 is provided with a paper support member 2 and a support means 4 that is spaced apart from the paper support member 2 and extends in the longitudinal direction of the paper support member 2. A reading position where the reading member 11 is disposed to face the paper support member 2, and the reading member 11 is placed close to the paper support member 2 to read an image drawn on the paper 3 on the paper support member 2. and a retracted position spaced apart from the paper support member 2, and a sensitivity level check member 14 is provided in the vicinity of the paper support member 2, and a sensitivity level check member 14 is provided in a moving area of the reading member 11 at the reading position. In order to change the position of the reading member 11 and the sensitivity level check member 14 in conjunction with the two positions, the reading member 11 and the sensitivity level check member 14 are arranged so as to be changeable between two positions, an opposing working position and a non-working position retreating therefrom. The frame 1 includes one drive device 1
8, and the drive device 18 is connected to the reading member 11 and the sensitivity level check member 14 via the motion transmission mechanism 19, and when the reading member 11 is located close to the sensitivity level check member 14, the reading member 11 is connected. An image reading device characterized in that it is configured to be able to check the reading sensitivity level of the image reading device. 2. The image reading device according to claim 1, wherein the frame 1 is provided with a cover 35 for covering the sensitivity level check member 14 disposed in a non-active position. 3. The image reading device according to claim 2, wherein the cover 35 includes a wiping member 36 for wiping the reflective surface 14a of the sensitivity level check member 14 as the sensitivity level check member 14 moves.