JPS6230100Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Technical field of the invention The present invention is a roll-type multi-item key input device used as an input device for an electronic computing device or its terminal, and is designed to detect whether a page sheet has been set normally or not. This relates to a detection mechanism for detection.

(2) Background of the Technology FIG. 1 is a diagram showing the structure of a conventional roll-type multi-item key input device. In the figure, 1 is an outer casing of the device, 2 is a keyboard, 3 is a winding shaft, 4 is a page sheet member wound around the winding shaft, 5 is a page selection roller, and 6 is a guide plate.

FIG. 2 is a diagram showing a page sheet member used in a conventional multi-item key input device. In the figure, 7 indicates a base sheet having pins 8, and 9 indicates a page sheet in which a plurality of items 9a are displayed on transparent paper or resin film. Note that a plurality of page sheets 9 are attached to the base sheet 7 with their positions shifted.

When using this device, as shown in FIG. , and then reverse the winding shaft 3 to load the desired page 4a.
is displayed on the keyboard 2, and a predetermined item is displayed for each key.

(3) Prior art and problems Conventionally, when setting a page sheet member on the winding shaft in this device, the page sheet member is inserted through the exchange port 10 shown in Fig. 1, and the pin 8 attached to the tip is wound. He is trying to engage with a groove 3a formed in the shaft 3. However, in this operation, the engagement between the pin 8 and the groove 3a of the winding shaft is performed at a location far away from the exchange port 10, so that the winding shaft may not be set properly. Conventionally, in such cases, winding abnormalities have not been directly detected, but have been indirectly detected by determining whether or not the selected page sheet has been properly set on the keyboard.

For this reason, with conventional devices, even if there is an abnormality in the winding state, the entire page sheet is wound up, and the page set operation must be performed at least once, resulting in damage to the page sheet. It was hot.

(4) Purpose of the invention In view of the above-mentioned conventional drawbacks, the object of the present invention is to provide a roll-type sheet setting detection mechanism capable of detecting an abnormality in setting a page sheet onto a roll shaft.

(5) Structure of the invention According to the invention, the purpose of this invention is to use a page sheet member, in which a plurality of page sheets are attached to a base sheet, which display functions on input keys of a keyboard, and is attached to a winding shaft. In a roll-type multi-item key input device, a small window is provided at a predetermined position in the base sheet light shielding part, and it is detected whether the optical sensor output through this small window can be synchronized with the reference pulse from another optical sensor. This is achieved by providing a roll-type sheet setting detection mechanism characterized in that it is configured to detect the setting state of a page sheet member on a winding shaft.

(6) Example of implementation of the idea Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 3 is a diagram showing a page sheet member according to the present invention. In the figure, 11 is a base sheet;
Reference numeral 12 indicates page sheets attached to the base sheet 11, respectively.

The key point of the present invention is that a small window 14 is provided in the opaque portion 13 (shown with hatching) of the base sheet 11. The small window 14 is provided at a position where it can be synchronized with a reference pulse caused by the rotation of the winding shaft, which will be described later, only when the base sheet member is properly set on the winding shaft.

FIG. 4 shows the main parts of the winding shaft 16 on which the page sheet member 15 is set. In the same figure, 1
7 is a ring portion of the winding shaft 16; 18 is a slit provided at equal intervals in the ring portion 17 to indicate which page of the page sheet; 19 is a slit for outputting a signal to reset the pulse generated by the slit 18; Reference numeral 20 indicates a slit for detecting the type of page sheet member, and reference numerals 21, 22, and 23 indicate photo sensors provided corresponding to each slit.

FIG. 5 is a cross-sectional view taken along the - line in FIG. 4. In the figure, 17 is a ring part of the winding shaft, 20 is a slit, 23 is a photo sensor, 24 is a light source, 13 is a light shielding part of the base sheet of the page sheet member, and 14 is a small window provided in the light shielding part. ing.

The roll-type sheet setting detection mechanism of the present invention configured as described above is such that when the page sheet member is properly set on the roll shaft, the small window 14 provided in the base sheet and the slit 20 coincide with each other. Therefore, the signal output from the photosensor 23 and the reference pulse (reset signal) output from the photosensor 22 are synchronized by the slit 19. If synchronization is not possible, use small window 14 on the base sheet.
This is because the page sheet member and the slit 20 do not match and the signal from the photosensor 23 is shifted or not output, so it is determined that the page sheet member is not properly set on the winding shaft.

Note that the light-shielding part of the base sheet of the page sheet member provided with the small window 14 stores a mark indicating the type of page sheet member, but the part provided with the small window 14 is removed from the part provided with the mark. Therefore, detection of the type of page sheet member is not affected.

(7) Effects of the invention As explained in detail above, the roll-type sheet setting detection mechanism of the present invention is capable of detecting the setting state of the page sheet member on the winding shaft with a simple configuration. This has a great effect in that it is possible to prevent damage to the page sheets caused by setting abnormalities as in the prior art.

[Brief explanation of the drawing]

Figure 1 is a diagram for explaining the structure of a conventional roll-type multi-item key input device, Figure 2 is a diagram for explaining a conventional page sheet member, and Figure 3 is a diagram for explaining a roll-type sheet set according to the present invention. FIG. 4 is a view showing the page sheet member of the detection mechanism, FIG. 4 is a view showing the main part of the winding shaft on which the page sheet member is set, and FIG. 5 is a sectional view taken along the line -- in FIG. 4. In the drawings, 11 is a base sheet of the page sheet member, 12 is the page sheet, 13 is a light shielding part of the base sheet, 14 is a small window, 15 is a page sheet member, 16 is a winding shaft, 17 is a ring part of the winding shaft,
18, 19, 20 are slits, 21, 22, 23
24 represents a photo sensor, and 24 represents a light source.

Claims (1)

[Scope of utility model registration request] In a roll-type multi-item key input device that uses a roll-type multi-item key input device in which a page sheet member is attached to a base sheet and a plurality of page sheets for displaying functions on a group of input keys of a keyboard are attached to a winding shaft, a predetermined number of page sheets in a light-shielding part of the base sheet is used. A small window is provided at the position, and the set state of the page sheet member on the winding shaft is detected by detecting whether or not the optical sensor output through this small window can be synchronized with the reference pulse from another optical sensor. A roll-type sheet setting detection mechanism characterized by having a configuration in which: