JPH0815833B2 - 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 when it moves, it is exposed and scanned to read the information on the writing surface with a reading means, and the read information is read. In an electronic blackboard for recording on recording paper by means of recording, an electronic blackboard provided with a pulse motor for moving the sheet and a pulse motor for feeding recording paper in the means for recording the read information on the recording paper. Is conventionally generally known.

C. Problems to be Solved by the Invention In the conventional electronic blackboard, since two pulse motors are used as described above, not only a large capacity power source is required, but also the sheet is installed between the two axes. Since the entire electronic blackboard is so large that it is suspended and is inconvenient to carry, there is a drawback that it is difficult to easily move it as needed and use it.

D. Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides writing,
A sheet as a writing medium with an erasable writing surface,
While fixing one end of the sheet and winding the sheet in the normal state, the sheet winding roller rotatably mounted on the machine base and the force with which the sheet is pulled out from the roller are wound. A spring for accumulating as a biasing force in the roll-in direction and biasing the roller, a stop means for stopping the sheet wound on the roller in a pulled-out state, and a roll-up movement of the sheet after releasing the stopped state of the sheet. It has a reading means for reading the information on the writing surface of the sheet, a recording means for recording the read information on a recording sheet, and a one-way clutch and a speed governor in the middle for transmitting the biasing force of the spring as the conveyance of the recording sheet. And a transmission gear group.

E. Action The sheet is stopped in the state of being pulled out from the roller against the bias of the spring, and after displaying information such as characters and figures on the writing surface of the sheet, the sheet is rolled into the roller, whereby the character, It is possible to obtain a recording paper on which information such as figures is recorded.

F. Embodiments The present invention will be described in detail with reference to embodiments shown in the drawings.
Reference numeral 2 is a sheet as a writing medium having a writable and erasable writing surface, 3 is a roller for winding the sheet 2, and one end 2'of the sheet 2 is fixed to the roller. As shown in FIGS. 3 and 4, the roller 3 is mainly mounted on a shaft 4 fixed to the roller 3 and the machine base 1 via a spring 5 stretched between the shaft 4 and the shaft 4. , Is biased in the direction in which the sheet 2 is rolled up,
The sheet 2 is wound around the roller 3 through the entrance / exit 6 of the sheet 1 formed in the machine base 1. Thus, the rolling movement of the seat 2 due to the bias of the spring 5 is prevented by the rod 7 provided at the other end of the seat 2 abutting against both side edges of the entrance / exit 6, and the seat 2 is machined. It is designed to be stored in the table 1. Further, when the seat 2 is rewound by the rod 7 against the urging force of the spring 5, the winding force of the spring 5 is accumulated. The roller 3 and the feed roller 10 for the recording paper 8 of the known recording means 9 for recording on the recording paper 8 incorporated in the machine base 1 are the gear 11 fixed to the shaft 10 'of the feed roller 10. Gear 12 mounted on machine base 1 and shaft 12 'of the gear
Is transmitted to a roller 3 by a biasing force of a spring 5 of the seat 2, which is conducted by a conduction gear group consisting of a gear 14 mounted on a roller via a one-way clutch 13 and a gear 15 fixed to the roller 3. Feed roller 10 at the time of loading
Not only is it possible to feed the recording paper 8 in synchronism with the sheet 2 by rotating the sheet 2, but also to prevent the sheet 2 from being urged by the spring 5 so that the machine 1
When pulled out, the one-way clutch 13 prevents the feed roller 10 from rotating in the opposite direction to the one in the previous period, so that the recording paper 8 cannot be fed backward. Reference numeral 16 designates a speed governor, which mainly comprises a ratchet gear 19 integral with a gear 18 meshing with the gear 12 through an intermediate gear 17 mounted on a machine base 1 as shown in FIG. A pendulum body (21) having a pair of pins (20, 20 ') to be engaged between teeth and movably mounted on the machine base (1) when the ratchet gear (19) is rotated by the rotation of the gear (14). The alternating engagement between the teeth and the pins 20, 20 'causes the pendulum body 21 to oscillate so that the rotation of the gear group due to the urging of the spring 5 can be adjusted at a constant speed. The winding speed of the sheet is controlled to be constant. twenty two
Is a stop pawl rod formed in a substantially L shape, and a pawl 23 that engages between the teeth of the chillet gear 19 is formed at one end thereof. The restraining pawl rod 22 is mainly mounted on the machine base 1 by a shaft 24 and a spring 25 so that the pawl 23 meshes with the teeth of the ratchet gear 19 as shown in the fifth drawing. 2 is allowed to move in the direction against the bias of the spring 5, and the seat 2 can be stopped at the moved position. By moving the claw 23 from the teeth of the ratchet gear 19 by moving it against the bias, the spring 5 of the seat 2 can be moved by the bias. Therefore, when drawing characters, figures, etc., the sheet can be stopped at the moved position. Reference numeral 26 is a known reading means consisting of an illuminating section 27 and a reading sensor section 28 which are built into the machine base, 29 is an electric path switch for the reading means 26 and the recording means 9, and this electric path switch 29 is The stop claw rod 22 is swung against the biasing force of the spring 25 so that the seat 2 can be moved in the biasing direction of the spring 5, and the closing means 22 is closed.
26 and the recording means 9 are respectively activated. Therefore, the sheet 2 is moved against the bias of the spring 5, and at the moved position, after the information such as characters and figures is displayed on the writing surface of the sheet 2 by writing or pasting, The stop claw rod 22 is moved against the urging force of the spring 25 so that the sheet 2 is rolled up and scanned by the roller 3, whereby the information on the writing surface of the sheet 2 is read by the reading means 26 and recorded. The recording paper 8 is recorded by the means 9 and is ejected to the outside of the machine base 1.

In the figure, 30 is a roll-shaped recording paper 8 mounted on the machine base 1.
The reference numeral 31 designates a mounting shaft and the reference numeral 31 designates a cutter for cutting the recording paper 8.

Further, in the above-mentioned embodiment, the case where the roll paper is used as the recording paper has been described, but the present invention is not limited to the roll paper, and the same can be carried out as described above even when the mono-leaf paper is used.

As described above, according to the present embodiment, since the roller 3 for winding the sheet 2 is driven by the tension of the spring 5 accumulated when the sheet 2 is pulled out, a motor for driving the roller is not used. Cost reduction,
The recording paper is also driven by the speed governor 20, the transmission gear groups 11, 12,
Since it can be performed in synchronization with the winding of the sheet by the 14, 15, 16, 17 and the one-way clutch 13, it is possible to further reduce the cost and obtain a sufficient copy.

G. EFFECTS OF THE INVENTION According to the present invention, since the sheet can be moved and scanned by the tension of the spring accumulated when the sheet wound on the roller is pulled out, it is possible to use a motor for moving the sheet, Since the sheet and the sheet are wound around one roller and pulled out, the apparatus can be downsized and the cost can be reduced. Further, when a character or a figure is drawn on the sheet, it can be stopped with the sheet pulled out, which is practical. In addition, the recording paper is conveyed by transmitting the biasing force of the spring through the transmission gear group.
Further, by having a speed governor and a one-way clutch, the winding speed of the sheet conveyance is regulated and the recording paper is conveyed in synchronization with the winding speed, so that a simple structure that does not require a drive source dedicated to the recording paper is provided. However, a high quality copy can be obtained, and the effect is great.

[Brief description of drawings]

1 is a perspective view, FIG. 2 is an explanatory view of essential parts, FIG. 3 is a partially enlarged perspective view, and FIG. 4 is a partial front sectional view. FIG. 5 is a partial explanatory view. 1 ... Machine stand, 2 ... Sheet, 3 ... Roller 4 ... Shaft, 5 ... Spring, 6 ... Doorway 7 ... Rod, 8 ... Recording paper, 9 ... Recording means 10 ... Feed roller, 11, 12 ... Gear 12 ... Shaft, 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 rod, 23 ... Claw 24 … Axis, 25… Spring 26… Reading means, 27… Illuminating section 28… Reading sensor section, 29… Electric circuit switch, 30… Mounting axis, 31… Cutter

Claims (1)

[Claims] 1. A sheet as a writing medium having a writable and erasable writing surface, and one end of the sheet is fixed and the sheet is wound in a normal state and is rotatably mounted on a machine base. A roller for winding the sheet, a spring for urging the roller by accumulating the force of pulling out the sheet from the roller as an urging force in the winding direction of the sheet, and a state in which the sheet wound on the roller is pulled out. Stop means for stopping the sheet, reading means for reading the information on the writing surface of the sheet when the sheet is rolled in after the sheet is released from the stopped state, recording means for recording the read information on a recording sheet, and the spring An electronic blackboard comprising: a transmission gear group having a one-way clutch and a speed governor in the middle for transmitting an urging force as the conveyance of the recording paper.