JP2006031188A - Opening/closing time recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small opening/closing time recorder which is attached to an opening/closing structure such as a door or a drawer and can store and display the time and count of opening or closing thereof. <P>SOLUTION: The opening/closing time recorder comprises permanent magnets attached adjacently to a movable part and a fixed part of the opening/closing structure and a device body. The device body is constituted by integrally including a liquid crystal display part, an operation part, a control processor, a magnetic sensor, a time counting circuit, a memory for time recording, and a battery. The recorder controls such that when the opening/closing structure is opened/closed, the magnetic sensor detects the strength of magnetic force of the permanent magnet as switch operation, which triggers the control processor to write time indicated by the time counting circuit into the memory for time recording and displays the time on the liquid crystal display part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an opening / closing time recording apparatus that senses that a door or desk drawer has been opened and closed, stores the opening and closing times and the number of times in a nonvolatile memory, and can display them.

A seal seal is affixed to the lid portion of the food that is packed in a bottle or the like. This seal seal does not prevent the lid from being opened and closed, and once the lid is opened, the seal is broken.
With the same idea, it is convenient to know that it can be easily opened and sealed on doors and desk drawers.
As an example of a crime prevention device, there is known a device in which an opening / closing detection sensor for detecting opening / closing is provided at an entrance / exit of a door, a window, or the like, and an alarm buzzer at a remote location sounds when the door is opened. (See Patent Document 1)
However, there is no need to put an alarm buzzer on the child room door or desk drawer. However, even in such a case, an apparatus that can know the history of the time of opening and closing is desired.
JP-A-9-185774

  The present invention was created to satisfy the above-mentioned demands, and the object of the present invention is a small-sized display that accumulates and displays the time and number of times of opening and closing by being attached to an opening and closing structure such as a door or desk drawer. An object is to provide an opening / closing time recording apparatus.

  An opening / closing time recording apparatus according to the present invention includes a permanent magnet and an apparatus main body that are attached in close proximity to a movable part and a fixed part of an opening / closing structure, respectively, and the apparatus main body includes a liquid crystal display unit, an operation unit, and a control processor. A magnetic sensor, a time counting circuit, a time recording memory, and a battery, and when the opening and closing structure is opened and closed, the magnetic sensor The control processor senses the strength of the time as a switch operation, and the control processor writes the time indicated by the time counting circuit to the time recording memory and displays it on the liquid crystal display unit. Features.

  When the control processor writes the open / close time in the time recording memory, it is preferable that the control processor updates and writes the open / close count in addition to the open / close time.

  The opening / closing time set by the switch operation of the operation unit and normally displayed on the liquid crystal display unit is the last opened / closed time, the last opened / closed time from the last opened / closed time, and finally opened / closed It is preferable to be able to be one of the opening and closing times two times before the time.

  (1) The time when the doors and drawers are opened and closed can be known. For example, it is possible to confirm an agreement between family members that a child room cannot be used without permission. (2) Attached to a storage box equipped with a plurality of drawers, can be used to measure the number of times each drawer is opened and closed, and to replace the items stored in the lower drawer, which is frequently removed, with an upper one that is easy to take out. . (3) The opening / closing time normally displayed on the display unit is the previous time, that is, the last opened / closed time, the oldest opened / closed time before the last opened / closed time, or the last opened / closed time Since it can be set to the oldest opening / closing time two times before or from the operation unit, it is possible to confirm at a glance the time when the door / drawer was last opened / closed according to the place where the present time opening / closing recording device is attached.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an external view of an opening / closing time recording apparatus according to an embodiment of the present invention. As shown in FIG. 1, the opening / closing time recording device 1 includes a device main body 2 and a permanent magnet 3.
The apparatus main body 2 is provided with a liquid crystal display unit 4, and the operation unit is provided with operation buttons 5, 6, and 7. The liquid crystal display unit 4 displays the time when the opening / closing structure is opened. Its shape is thin and long. Adhesive tape is provided on the bottom so that it can be installed anywhere. The permanent magnet 3 is plate-shaped and turns on or off an internal switch of a magnetic sensor described later built in the apparatus main body 2. The permanent magnet 3 has a predetermined magnetic force, is installed in parallel with the apparatus main body 2 and can turn on an internal switch of the magnetic sensor. A mounting screw hole 11 is provided in the permanent magnet 3.

FIG. 2 shows an example in which the opening / closing time recording device 1 is attached to a desk drawer. The apparatus main body 2 is attached to the front surface of the desk drawer 30 and the permanent magnet is attached to the back side of the table so as to be close to each other. When the drawer 30 is pulled out, the permanent magnet 3 and the apparatus main body 2 are brought into a separated state from the adjacent state, so that the internal switch of the magnetic sensor built in the apparatus main body 2 changes from on to off. To do.
Since the apparatus main body 2 and the permanent magnet 3 need only be attached to the movable part and the fixed part of the opening / closing structure in this way, the place is not limited to the example shown in FIG. It may be attached to. The opening / closing time recording device can also be attached to a glass door or door of a bookshelf.

  FIG. 3 is a configuration diagram of an electronic circuit mounted on the apparatus main body 2 of the opening / closing time recording apparatus. As shown in FIG. 3, the apparatus main body 2 includes a control processor 20, an operation unit 24, a magnetic sensor 23, a liquid crystal display unit 4, a battery 27, and the like. The time counting circuit is not provided with a dedicated circuit. Instead, the time counting circuit is realized by a program of the control processor 20 and hardware in the control processor.

  The control processor 20 is a one-chip microcomputer for control and has a flash memory 21 for storing programs. The built-in programs include a time counting program, a liquid crystal display control program, a button control program for an operation unit, and an operation monitoring program for an internal switch of a magnetic sensor. The time is the year, month, day, hour and minute, and is counted by the program of the control processor 20. Usually, the time is realized by using a real-time clock (RTC) chip, issuing a periodic interrupt to the control processor 20, and reading the year, month, day and time counted by the RTC. Here, since the load of the control processor 20 is small and no special accuracy is required at the time of opening and closing, the time is counted by the control processor 20 itself. The operation buttons 5, 6 and 7 of the operation unit are provided with a time adjustment function for adjusting the time delay advancement.

  The frequency of the oscillator 22 is set to 32.768 kHz because the processing performance is not required for the control processor 20. In order to count 0.0625 seconds (1/16 second) with this pulse, an 11-bit counter was provided. An interrupt is generated every time 2048 is counted by this counter. Then, during this time, the control processor 20 can perform other processing, and the control processor updates the year / month / date / time to be managed in response to the interruption. That is, control is performed so that the time of 0.0625 seconds is advanced by interruption. If a 1-chip microcomputer is provided with an 11-bit interrupt counter, this is used, and if not, a dedicated counter is prepared.

Specifically, the magnetic sensor 23 uses a reed switch 40. When the door or drawer is closed, the switch is turned on, and when the door or drawer is opened, the switch is turned off. Note that a Hall element may be used as the magnetic sensor. When the magnet approaches the Hall element, a voltage of about 0.1 to 0.2 V can be output, so that the circuit becomes slightly larger, but a switch that can be amplified and turned on or off can be formed.
Since the gap between the door and the drawer is generally narrow, it is somewhat difficult to install a contact-type mechanical switch. Similarly, photo-interrupter type optical sensor switches that block or pass light, for example, and photo-reflector type that utilizes light reflection, always emit light, so the life of the battery To shorten.

  1 is mounted on the operation unit 24, and the control processor 20 can know whether these operation buttons 5, 6, 7 are on or off. Although the button type switch is used in the embodiment, a touch panel type switch may be provided. The touch panel detects, for example, that the switch has been pressed as a change in resistance embedded in the sheet. The height of the apparatus can be suppressed, and since there is a transparent one, it can be overlaid on the display portion.

  The time recording memory 26 may be an EEPROM (rewritable nonvolatile memory). If the control processor 20 has such a memory inside, this is used. The capacity is about 16 bytes in total including the time and number of years, dates, times, and others, so long as it can store a plurality of these. If there is no such memory inside the control processor 20, it may be provided externally. The interface between the external nonvolatile memory and the control processor 20 employs a two-wire 12C interface or the like so that the number of pins is not increased. When a nonvolatile memory is employed, data can be read again even if the battery is removed or the power is turned off.

Here, the liquid crystal controller 25 and the liquid crystal display unit 4 are composed of 6 digits for miniaturization, and the numbers are scrolled and displayed. For example, if a liquid crystal of 7 segments is used and the time data is 12:30 on November 20, 2003, and the number of times is 12, as shown in the drawing circle, “03.11.20 16.30 12 "12-digit number" is always displayed while scrolling from right to left.
The battery 27 is a lithium battery and can output 3.6V.

  FIG. 4 is an operation explanatory diagram when the magnetic sensor 23 is a reed switch. As shown in FIG. 4, the reed switch 40 is configured such that two reed pieces 41 and 42 are provided on a glass tube 43 filled with an inert gas to perform a switching operation. (A) shows a case where the permanent magnet 3 is not nearby, and the lead pieces 41 and 42 are off (in a separated state). When the permanent magnet 3 is brought close to the reed switch 40, the lead pieces 41 and 42 are turned on (in a contact state) as shown in FIG. N indicates the N pole of the magnet, and S indicates the S pole of the magnet.

  The lead piece 42 is connected to GRD (ground), and the lead piece 41 is connected to 3.6 V via a resistor and connected to an input pin of the control processor 20. If the control processor 20 sees a high level of 3.6V on this input pin, the reed switch 40 is turned off, there is no permanent magnet 3 near the reed switch 40, and the door or drawer is opened. Know that you are in a state. If a low level of 0V is seen at this input pin, it is understood that the reed switch 40 is on, the permanent magnet 3 is near the reed switch 40, and the door or drawer is closed.

  The control processor 20 constantly monitors this input pin at a predetermined time interval that the reed switch 40 is turned from on to off and / or from off to on, and the value at two consecutive time intervals does not change. It can be detected by examining. If the reed switch is on at the first checked time and the reed switch is off at the next checked time, this is the time when the door or drawer is opened. Write to. When recording, the count is incremented by one. A plurality of storage areas are provided and used from the beginning, and when the end is reached, the beginning is returned and used again.

Now, it is assumed that the data of the time and the number of times of the last opening / closing operation are stored at address A, and the address to be stored next points to A + 1. Usually, the display on the display unit can be set by operating the switch of the operation unit from among those of address A, address A-1, and address A-2.
A plurality of storage areas of the time recording memory 26 are necessary. When the opening / closing time recording device is installed on the indoor side of the door, the display section of the opening / closing time recording device is viewed after entering the room. This is because the opening time is displayed and the previous opening time is erased by overwriting.

  As shown in FIG. 2, when the opening / closing time recording device 1 is attached to the front surface of the drawer, it is not necessary to open / close the drawer, and the time and number of times of opening / closing last may be displayed on the display unit. When the opening / closing time recording device 1 is installed in the desk, the opening and closing time and the number of times of opening and closing are not displayed, but the drawer is always opened and the opening / closing time recording device 1 is viewed. It is preferable to set to display the previous opening / closing time and the number of times. When it is installed inside the door of the room, the door is opened to enter the room, and when the room is entered, the door is closed, so the display content is checked after two operations of opening and closing. It is preferable to set the display of the section so that the data two previous to the data stored last in the time recording memory is displayed.

Several instructions can be issued by the operation buttons on the operation unit. Such an operation button operation is performed by first pressing two operation buttons simultaneously to change the mode.
When the mode is set to “time adjustment mode”, each time the operation button 5 is pressed, “year”, “month”, “day”, “hour”, and “minute” are selected, and the operation button 6 increases the selected value. As the button, the operation button 7 becomes an operation button for reducing the selected numerical value.
When the mode is set to “initial setting mode”, the operation button 5 resets the “number of times”. When the operation button 6 is pressed, the address of the time recording memory 26 is decremented by one and the content is displayed. By repeating this, all the contents of the time recording memory can be viewed. When the operation button 7 is pressed, the address of the time recording memory 26 is incremented by one and the contents are displayed.
In addition, it can be used as a clock by specifying to display the time on the display unit. It is possible to set to record only one of the doors and drawers without recording the time of opening and closing, and if it is always a pair. It can also be set to record the number of hours from opening to closing doors and drawers.

  In order to reduce the thickness of the opening / closing time recording apparatus, it is desirable that the control processor 20 uses a bare chip. In addition, although the opening / closing time recording apparatus is of a long type so that the magnetic sensor operates regardless of whether the permanent magnet is installed on the upper or lower side, it may be a rectangular type or a square type. In this case, it is necessary to select a slightly strong permanent magnet, but there is an advantage that the mounting area of the control circuit can be increased and the number of display digits can be increased.

  Since the present invention can be easily attached to a drawer or a door of a desk driven by a battery and takes a history of the time and number of times of opening and closing, it can be applied as a daily tool or a measurement tool.

In the Example by this invention, it is an external view of the opening / closing time recording device. This is an example in which the opening / closing time recording device is attached to a desk drawer. It is a block diagram of the electronic circuit mounted in the switching time recording apparatus by this invention. It is operation | movement explanatory drawing of a reed switch. (A) shows an OFF state. (B) shows an ON state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Opening / closing time recording apparatus 2 Apparatus main body 3 Permanent magnet 4 Liquid crystal display part 5, 6, 7 Operation button 11 Screw hole for attachment 20 Control processor 21 Flash memory 22 Oscillator 23 Magnetic sensor 24 Operation part 25 Liquid crystal controller 26 Time recording memory 27 Battery 30 Drawer 40 Reed switch 41, 42 Lead piece 43 Glass tube

Claims (3)

The movable body and the fixed part of the opening / closing structure are composed of a permanent magnet and an apparatus main body, which are attached in close proximity to each other. The apparatus main body includes a liquid crystal display unit, an operation unit, a control processor, a magnetic sensor, and a time counting circuit. And a time recording memory and a battery including an integrated structure,
When the opening / closing structure is opened / closed, the magnetic sensor senses the strength of the magnetic force of the permanent magnet as a switch operation, and the control processor uses this as a trigger to record the time indicated by the time counting circuit. An opening / closing time recording apparatus controlled to be written to a memory and displayed on the liquid crystal display unit.   2. The opening / closing time recording apparatus according to claim 1, wherein when the control processor writes the opening / closing time in the time recording memory, the opening / closing time is updated and written in addition to the opening / closing time.   The opening / closing time set by the switch operation of the operation unit and normally displayed on the liquid crystal display unit is the last opened / closed time, the last opened / closed time from the last opened / closed time, and finally opened / closed 2. The opening / closing time recording apparatus according to claim 1, wherein the opening / closing time recording apparatus can be set to any one of two opening / closing times before the time.

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