JPS6221131A - Positioning device for information retrieving device - Google Patents

Abstract

PURPOSE:To adjust the positioning speed of an information retrieving device freely with the pushing force of an operator by varying the driving state of a driving means according to the pushing force to a switch which is is turned on and off by depression. CONSTITUTION:A film F is clamped and necessary key pads 21-24 on the keyboard of a controller are pressed so that a desired frame is projected on a screen 11. Variation in the resistance value of a pressure sensor 27 for them is detected as a voltage value, which is amplified by amplifiers 431-434 to a necessary voltage level. This voltage value is converted by an A/D converter 45 into a digital value, which is read in a CPU41. The CPU41 supplies a motor driving circuit 46 with a short-period pulse when outputs from the respective pressure sensors 271-274 are large or a long-period pulse output when small according to a program written previously in a ROM42 to drive corresponding pulse motors MX, MY, thereby moving the film F to a desired position at a specific speed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an information retrieval device, and particularly to an information retrieval device equipped with a driving means for positioning an information recording medium.

[Prior art] Conventional microfilm and microfiche reading devices require fine adjustment to set the desired image at the reading position! As one mechanism, for example, a positioning pulse motor was rotated at a low speed by pressing a fine adjustment switch on the keyboard L, so it took a long time to stabilize the projected image at the desired position. Or, conversely, the speed is too fast, making accurate positioning difficult.

In order to compensate for the above-mentioned drawbacks, an example has been proposed in which the fine adjustment speed is automatically increased when the pressing time of the fine adjustment switch exceeds a predetermined time. If the m-regular interval spans a long distance,
Close to the target position, cancel the high-speed feed mode and move the low-speed machine gJ.
′! ! ! This required an operation to restore the data, which was cumbersome.

〔the purpose〕

The present invention has been made in view of one or more problems of the conventional example, and at the same time eliminates the drawbacks of the above-mentioned conventional example,
The purpose of the present invention is to provide a fine adjustment means with excellent operability and good correspondence between operator's sense and adjustment speed.

〔Example〕

The present invention will be explained below based on examples. In Figure 1,
A perspective view of a microfilm league to which unreleased Ill can be applied is shown. Figure 2 is an explanatory diagram of the league's reading optical system, and Figure 3 is an enlarged perspective view of an X-Y positioner for positioning microfilm, which is an information recording medium. It is a diagram.

In FIG. 1, reference numeral 1 denotes a pedestal, in which a light rA4, a reflector 5, an illumination lens 7, etc. shown in FIG. 2 are housed. 2 is a housing equipped with a screen 11;
Mirror 9 inside. 1O is housed, and a projection lens 8 is disposed at the bottom. 3 is a positioner for positioning the microfilm F, and the film F is placed between the upper and lower glass plates g1. g2, holding members 35, 3
It is installed on 8. The holding member 35 is inserted into and slides on a guide rod 37 fixed to the frame body 39. On the other hand, the holding member 38 is provided with a female thread and is axially attached to the frame body 39 symmetrically with the guide rod 37. It is supported and threadedly engaged with the single-head screw 36. The lead screw 36 is driven by a pulse motor MY disposed at one end thereof, and is driven by a holding member 38.35.
That is, the film F can be moved in the Y direction.

The frame body 39 has one end connected to a pair of side frames 3 extending in the Y direction.
A guide rod 34 fixedly attached to 1 and 32 and extending in the X direction can be inserted therethrough and moved along it. The other end is provided with a female thread, which extends in the X direction and is pivotally supported by the side frames 31 and 32.
The frame body 39 on which the film F is mounted can be moved in the X direction as a whole by a pulse motor Mx disposed at one end of the screw 33.

With the above configuration, an image can be projected onto the screen 11 by moving the microfilm F in the X-Y directions.

Figures 4 to 8 are explanatory diagrams showing one embodiment of the present invention, which is applied to the microfilm league shown in Figures 1 to 3, and will be explained in comparison with each of the above figures. . FIG. 4 is a plan view of the arrangement of key pads for fine positioning disposed on a controller (not shown), FIG. 5 is a sectional view of the internal structure of each key pad, and FIG. 6 is a block diagram of the control circuit. FIG. 7 is an enlarged sectional view of the pressure sensor inside each key, and FIG. 8 shows a pressure resistance value characteristic curve of the pressure sensor.

First, the configuration will be explained. In Figure 4, 21°22.2
Reference numeral 3.24 denotes four keypads for inputting fine adjustment movements in the arrow directions, and are arranged on the keyboard of the controller (not shown). As shown in FIG. 5, the internal configuration of each keypad 21 to 24 is such that a pressure sensor 27 whose resistance value changes upon detecting the pressing force of the operator is connected to a washer 30. It is supported by a compression coil spring 28 and held between a pressing sheet 26 and a base 29. Each pressure sensor 27 is made by sandwiching a synthetic rubber 51 kneaded with carbon particles 50 between electrodes 52 and 53 on both upper and lower surfaces, as shown in an enlarged cross section of an example in FIG. The structure is such that the resistance value characteristics shown in FIG. 8 can be obtained.

Next, in FIG. 6, 271 to 274 are respectively i
5 shows the pressure sensor 27 in FIG. The multiplexer 45 is an A/D converter that inputs a digital amount corresponding to the pressing force of the pressure sensors 271 to 274 of each keypad to the CPU 41, which is mainly composed of a microcomputer. The microcomputer of the CPU 41 is operated by software in the ROM 42, and is configured to control a motor drive circuit 46 for driving each of the pulse motors Mx and My of the x-y positioner.

Next, the operation when the above configuration is applied to the microfilm league shown in FIGS. 1 to 3 will be explained. Between both glass plates g1 and 52 in Figures 1 to 3,
The required keypads 21 to 24 on the keyboard of the controller (not shown) are used to hold the microfilm F, which is an information recording medium, and project the desired pieces onto the screen ll.
(Figure 4). When any of the keypads is pressed, the resistance value of its pressure sensor 27 (FIG. 5.6) changes according to the characteristics shown in FIG. 8. This change in resistance value is detected as a voltage value in FIG.
34 to the required voltage level. This voltage value is converted into a digital value by the A/D converter 45 and then read into the CPU 41.

The voltages corresponding to the four sensors 271 to 274 are switched by the multiplexer 44, and then the A/D
The signal is input to a converter 45 and converted into digital 4i data.

On the other hand, the CPU 41 controls each pressure sensor 271 to 274 according to a program stored in the ROM 42 in advance.
If the output from Move F to the desired position at a corresponding predetermined speed. Namely.

If you strongly press the keypads 21 to 24, the pressure sensor 2
7 resistance (/j decreases, the output voltage value increases, sends a short-period pulse to the motor drive circuit 46, and the corresponding motor rotates faster; on the other hand, if you press it weakly, the motor rotation slows down. .

Therefore, when the distance to move to the desired fill projection position is long, the operator presses the keypads 21 to 24 strongly to approach the target position at high speed, and when the operator approaches the target position, the pressing force on the keypad is weakened to make fine adjustments at low speed for more accurate accuracy. Users can perform accurate positioning according to their own senses.

Although the above embodiment describes the positioning of the microfilm league in the X-Y directions when the information recording medium is microfilm, the present invention is not limited to this only, and may be performed only in the X direction or X, Y, Z3
Similar effects can be obtained by applying this type of general information retrieval device having a positioning device in the direction or rotation direction.

Further, the pressure sensor 27 employed in the embodiment may be, for example, a strain gauge, a semiconductor pressure sensor, a displacement sensor such as a differential transformer, or a sensor utilizing a piezoelectric effect.

Furthermore, the pulse motor MX of the above embodiment.

MY is not limited to this, and it goes without saying that a DC or AC variable speed motor can be used.

〔effect〕

As explained above, according to the present invention, the positioning speed of the information retrieval device is configured to be freely adjustable depending on the pressing force of the operator, thereby realizing slow operability that corresponds to the operator's senses. We were able to.

[Brief explanation of drawings]

1 is a perspective view of an example of a microfilm league to which the present invention can be applied, FIG. 2 is an explanatory diagram of its reading optical system, FIG. 3 is an enlarged perspective view of an X-Y positioner for microfilm positioning, and FIG. 5 is a sectional view of the internal structure of the keypad, FIG. 6 is a block diagram of the control circuit, FIG. 7 is an enlarged sectional view of the pressure sensor, and FIG. 8 is a sectional view of the keypad. It is a pressure-resistance value characteristic curve diagram. 3... Positioners 21 to 24 for positioning
...Key pad 27...Pressure sensor 33.36...Lead screw 41...CPU 46...Motor drive circuit F... ...Microfilm (information recording medium) Mx, My...Pulse motor (driver) Fig. 3 Fig. 4 Fig. 8J5

Claims (2)

[Claims] (1) A device for moving and positioning an information recording medium by a drive means, including a switch that is turned on and off by pressure to operate the drive means, and a drive state of the drive means depending on the pressing force of the switch. A positioning device for an information retrieval device, comprising: a control device for controlling the drive device to change the positioning device. (2) The positioning device for an information retrieval device according to claim 1, wherein the information recording medium is a microfilm.