JPH0815835B2 - Electronic blackboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF THE INVENTION The present invention relates to an electronic blackboard used for meetings and the like.

B. 2. Description of the Related Art A sheet as a writing medium having a writable and erasable writing surface is stretched between two axes and is exposed and scanned when moving.
In the electronic blackboard in which the information on the writing surface is read by the reading means and the read information is recorded on the recording paper by the recording means,
It is generally known that two pulse motors, one for moving the sheet and one for feeding the recording paper, are provided.

C. Problems to be Solved by the Invention As described above, in the conventional electronic blackboard, since two pulse motors can be used, a large capacity power source is required, so that it is better than a power line or the like. Since there is no choice but to rely on an external power source, there is a major drawback that the location of the external power source limits the place of use and the user cannot immediately use it in any case.

D. Means for Solving the Problems In order to solve the above-mentioned problems, the present invention is
A writing sheet as a writing medium with an erasable writing surface, and one end of this writing sheet was fixed and the writing sheet was rolled up in a normal state, and was rotatably mounted on a machine base. A sheet winding roller, and a spring for urging the roller by accumulating a force with which the writing sheet is pulled out from the roller as an urging force in the winding direction of the writing sheet.
Stopping means for stopping the writing sheet wound on the roller in the pulled-out state, and reading for reading the information on the writing surface of the writing sheet during the rolling movement of the writing sheet after the stopped state of the writing sheet is released. Means, a recording means for recording the read information on a recording paper, a transmission gear group and a one-way clutch for transmitting the biasing force of the rolling movement of the writing sheet by the spring as the feeding movement of the recording paper feed roller, It is characterized by comprising a reading means and an internal power supply for operating the recording means.

E. Action The writing sheet is parked in a state of being pulled out from the winding roller against the bias of the spring, and after the information such as characters and figures is displayed on the writing surface of the writing sheet, the writing sheet is rolled up. The writing sheet is rolled into the roller, and the reading means and the recording means are operated by the internal power source.
A recording paper on which information such as the characters and figures is recorded can be obtained.

F. Embodiments The present invention will be described in detail with reference to embodiments shown in the drawings.
2 is a writing sheet as a writing medium having a writable and erasable writing surface, 3 is a roller for winding the writing sheet 2, and one end 2'of the writing sheet 2 is fixed to this roller. Has been done. As shown in FIGS. 3 and 4, the roller 3 is mainly provided with a spring 5 stretched between the roller 4 and a shaft 4 fixed to the machine base 1.
The writing sheet 2 is energized in the direction in which the writing sheet 2 is rolled up, and the writing sheet 2 is rolled up in the roller 3 through the doorway 6 formed in the machine base 1. . Thus, the rolling movement of the writing sheet 2 due to the biasing of the spring 5 is prevented by the rod 7 provided at the other end of the writing sheet 2 abutting against both side edges of the entrance / exit 6. The writing sheet 2 is stored in the machine base 1. Further, when the writing sheet 2 is pulled out by the rod 7 against the bias of the spring 5, the winding force of the spring 5 is accumulated. The roller 3 and the feed roller 10 of the recording paper 8 of the known recording means 9 for recording on the recording paper 8 incorporated in the machine base 1 are a gear 11 fixed to a shaft 10 ′ of the feed roller 10. And a gear 12 mounted on the machine base 1 and a one-way clutch on a shaft 12 'of the gear 12.
A roller gear 3 which is conducted by a conduction gear group consisting of a gear wheel 14 mounted via 13 and a gear wheel 15 fixed to the roller 3, and which is energized by a spring 5 of the writing sheet 2.
Not only can the feeding roller 10 be turned in synchronization with the writing sheet 2 by the rotation of the feeding roller 10 at the time of being rolled up, the writing sheet 2 can be springed. When pulled out of the machine base 1 against the urging force of 5, the action of the one-way clutch 13 causes
The feed roller 10 is prevented from rotating in the opposite direction to the above-mentioned direction to reversely feed the recording paper 8. Reference numeral 16 is a speed governor, and the speed governor 16 mainly uses the intermediate gear 17 mounted on the machine base 1 as shown in the second drawing to form the gear 12
A pendulum body (21) having a pair of pins (20, 20 ') engaged between the teeth of a ratchet gear (19) integral with a gear (18) meshing with the gear (18) and swingably mounted on the machine base (1), The gear
When the ratchet gear 19 is rotated by the rotation of 14, the pendulum body 21 is rocked by the interengagement between its teeth and the pins 20, 20 ', and the gear group is rotated by the biasing of the spring 5. Is controlled to be constant. Reference numeral 22 denotes a stop pawl rod formed in a substantially L shape, and a pawl 23 that engages between the teeth of the ratchet gear 19 is formed at one end thereof. As shown in the second drawing, the stop claw rod 22 is mounted on the machine base 1 so that the claw 23 is engaged with the teeth of the ratchet gear 19 by the shaft 24 and the spring 25. The seat 2 is allowed to move in a direction against the biasing force of the spring 5, so that the writing seat 2 can be stopped at the moved position. By swinging against the bias of the spring 25 and disengaging the claw 23 from the teeth of the ratchet gear 19, the writing sheet 2 is allowed to move by the bias of the spring 5. Reference numeral 26 is a known reading means including an illuminating section 27 and a reading sensor section 28 incorporated in the machine base 1, 29 is an electric path switch for starting the reading means 26 and the recording means 9, and this electric path switch 29 is used. Is provided on the machine base 1 in a state in which the stop pawl rod 22 is swung against the biasing force of the spring 25 to allow the writing sheet 2 to move in the biasing direction of the spring 25. Internal power supply consisting of batteries
The electric circuit from 30 to the reading means 26 and the recording means 9 is closed so that the reading means 26 and the recording means 9 are operated respectively. Therefore, the writing sheet 2 is moved against the urging force of the spring 5, and at the moved position, information such as characters and figures is displayed on the writing surface of the writing sheet 2 by writing or pasting. After squeezing, stop rod 22
The writing sheet 2 is swung against the bias of the spring 25 so that the writing sheet 2 is rolled into the roller 3 and scanned, thereby reading the information on the writing surface of the writing sheet 2.
Is read, recorded on the recording paper 8 by the recording means 9, and ejected to the outside of the machine base 1.

In the figure, 31 is a roll of recording paper 8 mounted on the machine base 1.
2 and 32 are cutters for cutting the recording paper 8.

Further, in the above-mentioned embodiment, the roll paper is used as the recording paper, but the invention is not limited to the roll paper.
The same applies to the case of using a single sheet as described above.

G. EFFECTS OF THE INVENTION According to the present invention, electric power is not required at all for the rolling movement of the writing sheet to the rolling roller and the feeding movement of the recording paper via the transmission gear group including the one-way clutch. While being driven by the tension of one spring, for example, by the internal power supply provided in the machine base consisting of batteries, etc.
Since the reading means and the recording means are activated respectively, the location of the external power source does not limit the location of use, and the location can be used immediately in any place, such as outdoors. Thus, the effect of completely eliminating the defects in the conventional one is extremely large.

[Brief description of drawings]

1 is a perspective view, FIG. 2 is an explanatory view of a main part, FIG. 3 is a partially enlarged perspective view, and FIG. 4 is a partially enlarged front sectional view. , FIG. 5 is a partial circuit diagram. DESCRIPTION OF SYMBOLS 1 ... Machine stand, 2 ... Writing sheet, 2 '... One end of writing sheet, 3 ... Rolling roller 4 ... Shaft, 5 ... Spring, 6 ... Doorway 7 ... Rod, 8 ... Recording paper, 9 ... Recording Means 10 ... Feed roller, 10 '... Shaft of feed roller 10 11 ... Gear, 12 ... Gear, 12' ... Shaft of gear 12, 13 ... One-way clutch, 14 ... Gear 15 ... Gear, 16 ... Governor, 17 ... Intermediate gear 18 ... Gear, 19 ... Ratchet gear 20, 20 '... Pin, 21 ... Pendulum body, 22 ... Stopper claw rod, 23 ... Claw,
24 ... axis, 25 ... spring, 26 ... reading means, 27 ... illumination section 28 ... reading sensor section, 29 ... electric circuit switch 30, internal power supply, 31 ... mounting axis, 32 ... cutter

Claims (1)

[Claims] 1. A writing sheet as a writing medium having a writable and erasable writing surface, and one end of the writing sheet is fixed and the writing sheet is rolled up in a normal state and is rotated with respect to a machine base. A roller for wrapping a sheet movably mounted, a spring for urging the roller for accumulating a force with which the writing sheet is pulled out from the roller as an urging force in the winding direction of the writing sheet, and a roller. Stopping means for stopping the writing sheet wound in the drawing sheet in a pulled-out state, and reading means for reading information on the writing surface of the writing sheet when the writing sheet is rolled up after the writing sheet is stopped. A recording means for recording the read information on a recording sheet, and a transmission gear group and a one-way gear for transmitting the biasing force of the rolling movement of the writing sheet by the spring as the feeding movement of the recording sheet feed roller. Electronic blackboard, characterized in that comprises a clutch and an internal power supply for recording means actuated when said reading means.