JP2003114289A - Radio wave correctable clock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a severe problem that, in selecting time information of different signal forms transmitted from a plurality of stations using a switch, storing station selection information in an electronic clock for receiving, and editing time information into time using the stored station selection information, information of another station is edited and an erroneous time is calculated if the selected information changes due to noises or the like. SOLUTION: In this electronic clock which has an oscillator 1 which outputs a reference signal, a time circuit which outputs a time signal based on the reference signal, a display means 11 which displays the time content of the time circuit, a receiving circuit 12 which selects and receives time information of different signal forms transmitted from the plurality of stations using external operating members, and a control means 3a which corrects the time circuit based on the received time information, the control means 3a reads the conditions of the external operating members just before the time information from the receiving circuit 12 is processed.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic timepiece. 2. Description of the Related Art Conventionally, radio timepieces capable of receiving time information of different formats transmitted from a plurality of stations have been commercialized, and a method of calculating time from the time information is to select a station by operating a switch. When the receiving circuit receives the time information, it calls the stored selected station information, performs reception processing according to the selected station, and calculates the time. However, in the above-described configuration, when a switch malfunctions due to noise or the like, it is determined that the switch has been operated, the information is stored as receiving station information, and time information is arithmetically processed. In this case, the received time information may cause a reception process of another station to calculate an incorrect time, which is a serious problem.
An object of the present invention is to solve the above-described problem and perform accurate reception of time information by performing reception processing of a selected station. [0004] To achieve the above object, the present invention has the following configuration. An oscillator that outputs a reference signal, a clock circuit that outputs a clock signal based on the reference signal, and a display unit that displays the clock content of the clock circuit.
In an electronic timepiece having a receiving circuit for selecting time information having different signal formats transmitted from a plurality of stations by an external operation member and receiving the received time information, and a control unit for correcting the time counting circuit based on the received time information, The control means reads the state of the external operating member immediately before processing the time information from the receiving circuit. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit block diagram of an electronic timepiece according to the present invention. An oscillator 1 uses a crystal oscillator as a reference signal, and outputs an oscillation signal. Reference numeral 2 denotes a frequency dividing circuit that receives an oscillation signal from the oscillator 1 and outputs a frequency divided signal S2. Reference numeral 3 denotes a well-known microcomputer (hereinafter referred to as a microcomputer).
b, RAM 3c. C is stored in the ROM 3b.
A program for controlling the PU 3a is written,
The U3a performs a timekeeping operation using the frequency-divided signal S2 as a reference clock while exchanging data with the RAM 3c according to this program, and sequentially writes the timekeeping result to a timekeeping circuit configured in the RAM 3c. Further, the CPU 3a reads the contents of the clock circuit and reads the second hand 11a and the hour / minute hand 11 described later.
The hand positions of c, 11b and the date plate 11d are calculated, and each hand is controlled. It also controls the operation and output signal according to the input signal. The result of calculating the hand position is stored as hand position data in a hand position storage unit 3d in the RAM 3c. or,
The CPU 3a processes the time information received by the receiving circuit 12, which will be described later, and transfers the processed time information to a clock circuit in the RAM 3c. Reference numeral 4 denotes a drive pulse S4 having alternately different polarities.
A converter driving circuit that outputs 0, S41, S42,
A drive pulse selected by the selection signal S30 from the microcomputer 3 is output, and the step motors 5, 6, and 7 are driven.
Reference numerals 8, 9, 10 denote reduction gear trains meshed with the stepping motors 5, 6, 7, and a second hand 11a supported by a second wheel which constitutes a part of the reduction gear train 8, and the second reduction gear wheel. A minute hand 11b and an hour hand 11c supported by a minute wheel and an hour wheel that constitute a part of the train wheel train 9, and the date and time are displayed by a date plate 11d supported by a date wheel that constitutes a part of the speed reduction train wheel train 10. Is displayed. Reference numeral 12 denotes a receiving circuit provided with a tuning coil, a capacitor, and the like for receiving radio waves transmitted from a plurality of stations. The receiving circuit 12 is operated at a regular time (eg, 2:00:00 am) or by operating a receiving switch SWf described later. It operates with a control signal S31 output from the microcomputer 3. The receiving circuit 12 selects one station from a plurality of stations by switching a tuning coil and a capacitor by a tuning switch SWe described later. Further, the receiving circuit 12 outputs the received data S12. The microcomputer 3 fetches the reception data S12, performs a reception process of channel selection according to a channel selection switch SWe described later from a program written in the ROM 3b, calculates a reception time, and moves the hands to the reception time. Reference numeral 15 denotes a switch group which operates in conjunction with the external operation member, and is a crown (not shown) of the external operation member.
A switch SWa that operates in conjunction with the one-stage drawer position,
A switch SWb that operates in conjunction with the crown two-stage pull-out position, a switch SWc that operates when the crown performs a forward rotation operation, a switch SWd that operates when the crown performs a reverse rotation operation, and selection of one station from a plurality of stations. S
It is composed of a tuning switch SWe that outputs 15e, and a receiving switch SWf that forcibly receives the signal. The operation signal of each switch is input to the microcomputer 3. The microcomputer 3 performs a correction operation and the like according to a program written in the ROM 3b in response to a switch input operation signal. Next, the operation of the electronic timepiece having the above configuration will be described with reference to FIG. The whole body is initialized by turning on the battery (not shown). Immediately after the so-called system reset, the wearer can rotate the second hand 1 by turning the crown one step and two steps.
The reference position is set by setting 1a to the 12 o'clock position, setting the hour and minute hands 11b and 11c to the 12 o'clock position, and setting the date plate 11d to one day. When the reference position is set and the crown is pushed down to the 0th step (normal position), the microcomputer 3 stores that the reference position setting is completed, and sets the time content to 12: 00: 00: 00 am on January 1, 0 Then, the hand position data of the second hand 11a, the hour / minute hands 11c, 11b, and the date plate 11d in the hand position storage unit 3d are set to the initial values, the timing operation is started, and the second hand is moved by one second. At the same time, the second hand position data in the hand position storage unit 3d is also added. Next, the operation of adjusting the time and calendar will be described. When the crown two-stage pulling position signal SWb after the reference position setting is completed is input, the microcomputer 3 sets the time correction state, clears the second of the clock content, and stops the clock operation. At the same time, the number of drive pulses from the current hand position data of the second hand 11a to the 0 second position (12 o'clock position) is calculated, and a selection signal S30 corresponding to the number of pulses is output. The second hand 11a is moved to the 0 second position (12 o'clock position) by the drive pulse S40 of the converter drive circuit 4 and stops. Further, the second hand position data in the hand position storage unit 3d is initialized. The rotation of the crown in this state (the crown is pulled out at the second stage) corrects the hour and minute times. When the crown rotation operation is input, the microcomputer 3 discriminates between the forward rotation operation and the reverse rotation operation and outputs a selection signal S30. The converter drive circuit 4 outputs a drive pulse S41 for normal rotation in the case of a forward rotation operation and a drive pulse S41 for a reverse rotation in the case of a reverse rotation operation according to the selection signal S30. At the same time, the hand position data in the hand position storage unit 3d is updated. The minute hand 11b and the hour hand 11c are operated by the drive pulse S41 via the stepping motor 6 and the reduction wheel train system 9. The hour and minute of the timekeeping content, the hour and minute, and the hand position data of the day in the hand position storage unit 3d are also updated at the time corresponding to the current time. When the crown is released from the double-step position at the exact minute of the time signal, the timer starts. When the two-step pulling position is released and the one-step pulling position is input, a calendar correction state is set. When a crown rotation operation is input, forward rotation operation and reverse rotation operation are discriminated, and a selection signal S30 is issued. Is output. The converter drive circuit 4 uses the selection signal S30 for forward rotation when the forward rotation operation is performed,
At the time of the reverse rotation operation, a drive pulse S42 for reverse rotation is output.
At the same time, the date of the time is updated, and the hand position data of the date plate in the hand position storage unit 3d is updated. The date plate 11d has a drive pulse S42.
Thus, the motor operates via the step motor 7 and the speed reduction train train 9. Crown 1-step pulling position is released and normal position (0 step)
When it becomes, the hand movement starts for 1 second, and it becomes the normal use state. In the normal use state, the microcomputer 3 performs a timekeeping operation using the frequency-divided signal S2 as a reference clock, calculates the hand positions of the second hand 11a, the hour / minute hands 11c, 11b, and the date plate 11d according to the timekeeping content, and controls each hand. Do. The result of calculating the hand position updates the hand position data in the hand position storage unit 3d in the RAM 3c. Next, a receiving system which is a feature of the present invention will be described with reference to the flowchart of FIG. The receiving circuit 12 selects tuning information S output by operating the tuning switch SWe.
At 15e, a receiving station is selected. Microcomputer 3 keeps time at 2 am
When the time reaches 0:00:00 (scheduled reception step) or when the reception switch SWf is operated (forced reception step), the control signal S31 is output (step), and the reception circuit 12 is operated to enter the reception state. . The receiving circuit 12 starts receiving and outputs received data S12. The microcomputer 3 inputs the received data S12, reads the tuning information S15e of the tuning switch SWe (step), determines the selected station (step), and selects a station according to the tuning information S15e from the program written in the ROM 3b. The reception process (step, step) is performed, and the reception time is calculated (step). After calculating the reception time, the reception circuit 12
Is output, and the power consumption in the receiving circuit 12 is saved. Further, the microcomputer 3 stores the calculated time in the clock circuit, and stores the second hand 11a and the hour / minute hand 1
The hand positions of 1c, 11b and date plate 11d are calculated, and a selection signal S30 is output. The converter driving circuit 4 generates a driving pulse S4
0, S41, S42, and outputs step motors 5, 6,
7. The time received via the speed reduction train trains 8, 9, 10 is indicated by the second hand 11a, the minute hand 11b, the hour hand 11c, and the date plate 11d. As described above, according to the present invention, the receiving circuit reads the switch information for selecting the receiving station after receiving the time information, performs the receiving process according to the receiving station, and calculates the time. In this case, the time is displayed, so that a switch is operated due to noise or the like, wrong station information is stored, and an electronic timepiece stable in quality without performing wrong reception processing can be supplied.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit block diagram of an electronic timepiece according to one embodiment of the present invention. FIG. 2 is a flowchart illustrating a reception processing method according to an embodiment of the present invention. [Description of Signs] 1 oscillator 2 frequency dividing circuit 3a CPU 3b ROM 3c RAM 3d needle position storing unit 12 receiving circuit 15 switch group

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Masaaki Gyokawa             6-11-12 Tanashi-cho, Nishi-Tokyo, Tokyo             Inside Tizun Clock Co., Ltd. F-term (reference) 2F002 AA05 AA12 BA06 BA08 BD03                       FA16                 2F083 AA01 CC02 JJ11

Claims (1)

Claims: 1. An oscillator for outputting a reference signal, a clock circuit for outputting a clock signal based on the reference signal, a display means for displaying the clock content of the clock circuit, In a radio-controlled timepiece having a receiving circuit for selecting time information having a different signal format transmitted from a station by an external operating member and receiving the received time information, and a control means for correcting the time counting circuit based on the received time information, A radio-controlled timepiece wherein the control means reads the state of the external operation member immediately before processing the time information from the receiving circuit.