JPS60194387A - Electronic watch with recording and regeneration function - Google Patents

Abstract

PURPOSE:To reduce the number of connection terminals between circuit boards and enhance mounting yield, by mounting circuit groups comprising electronic elements to two or more of circuit boards in a dispersed state and mounting RAM and an RAM drive circuit on the same circuit board. CONSTITUTION:Function, such that a voice signal is converted to a digital code which is, in turn, stored in RAM and the digital code is again read to the converted to the voice signal, is assembled in a wristwatch. In this electronic watch with recording and regeneration function, circuit groups constituting the electronic watch and the recording and regeneration function are mounted to two circuit boards 48, 50 in a dispersed state. That is, circuit elements such as a central control IC chip, a voice amplifying IC or a quartz vibrator are mounted to one circuir board 48 while RAM storing digitalized sound and an RAM drive circuit IC chip for the analysis and synthesis of voice are mounted to the other circuit board 50 and both circuit boards are connected by a connector 59 formed by alternately laminating conductive rubber and insulating rubber.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mounting structure of an electronic timepiece with a recording and playback function using an IC memory.

[Background of the invention]

Traditionally, wristwatches have been equipped with a recording and playback function that converts audio signals into digital codes, stores them in writeable and readable RAM, and demodulates the digital codes back into audio signals, and has a memo function and a voice alarm function. However, it was not possible to make it into a wristwatch due to the memory capacity of the RAM and the current consumption.

However, in recent years, IC technology has improved dramatically, and statically driven RAM with 64 bits is now commercially available, making it possible to equip wristwatches with short-term recording and playback functions.

[Conventional technology and problems]

However, compared to conventional watches that only display the time, they have disadvantages such as an increase in the number of components and a larger circuit system, making the watch larger, making it less comfortable to use, and lacking in aesthetic design.

[Purpose of the invention]

The present invention aims to eliminate such drawbacks by implementing high-density packaging, and to provide a small-sized wristwatch that has a recording and playback function.

[Embodiments of the invention]

This will be explained below according to the drawings.

FIG. 1 is a plan view showing the external appearance of a timepiece according to an embodiment of the present invention, and FIG. 2 is a plan view of a digital display segment of the timepiece shown in FIG.

The body 1 of the watch case includes a pointer display section 2, a digital display section 3, a sound output hole 4 for a speaker that outputs sound, and an IJ, an earpiece 5, and a pushbutton 6 as external operating members.
7.8 is provided.

This section describes the watch functions and operating methods. The hand display section 2 displays the hours, minutes, and seconds using three hands: hour hand 9, minute hand 10, and second hand 11.Hand movement is stopped by pulling the crown 5 to the first position, and in this state, the crown 5 is rotated to set the time. When the crown 5 is pushed in, the hands start moving at the same time. The digital display section 2 has the segments shown in FIG. 2, and the push button as shown in the flow chart of FIG.
By operating the buttons 7C, 8W, ), each mode is selected and displayed in the following order: time display mode → calendar display mode → alarm time display mode → recording mode → time display mode.

The button 6 (SW2) has a correction digit selection function and a recording function, and the button 8 (SW3) has a correction function, a playback function, and an alarm sound monitoring function. The operating method will be explained according to FIG.

In time display mode, hour, minute, second, morning (A) or afternoon (P)
) is displayed. Press SW3 to play the previously recorded audio. The playback sound is generated by pressing SW3 and pressing SW
If you release the 3 button, it will pause, and if you press it again, it will continue playing from the point where it stopped, allowing you to play for a total of 6 seconds.

To adjust the time, press and hold SW2 for 2 seconds to enter the adjustment state and the seconds display will blink. If you press SW3 here, the seconds display will change to 2.
Before 9 seconds, the minute display will not be incremented and will be reset to 0 seconds.
After 30 seconds, the minute display is advanced by 1 minute and reset to 0 seconds. If you press SW2 further, the minute digit will blink, and if you do not press SW3, you will be able to add one minute at a time. Also, if the amount of correction is large,
If SW3 is held down for 2 seconds or more, the minutes will automatically advance continuously.

Next, press SW to adjust the hour digits, and then press SW.
When W2 is pressed, pressure can be inserted in the morning (A) and afternoon (P). Further pressing SW2 switches between the 12-hour system and the 24-hour system. When SW2 is further pressed, the normal time display mode is entered. Corrections can be made by operating SW2 at each correction digit. Also, the dotted line flowchart 1 is 2~
A 3-minute timer activates and automatically returns the device without any operation.

In the calendar display mode, the month, date, and day of the week are displayed, and corrections are made by selecting the correction digit with SW2 and making corrections with SW3. SW also in this mode.

It is possible to playback the audio by.

In the alarm time display mode, when an alarm is set, the hours and minutes of the alarm cent time are displayed, and the characters AL indicating that the alarm mode is in the time display mode are displayed. If no alarm is set, the characters 0FFAL will be displayed. In this state, pressing SW allows you to monitor the alarm sound.

The alarm sound can be selected to produce only the melody, or to play the melody 1 recorded audio and then produce the melody consecutively. When monitoring the alarm sound, the selected alarm sound will be played. pronounce. To correct the alarm set state, press and hold SW2 for 2 seconds to enter the correction state, where the hours and minutes or OFF flash and press SW3 to switch the alarm set ON or OFF.

Next, when you press SW2, the A or P and hour digits of the alarm time flash, and you can correct the hour digits using SW3.Next, when you press SW2, the minute digits flash and the minute digits can be corrected. It is. Next, when SW2 is pressed, the alarm sound is selected as described above, and the letters VOICE or ALM are blinking, and they can be selected alternately by pressing SW2. Next, press SW2 to return to the initial state of alarm time display mode.

In the recording mode, the characters RPC5 are initially displayed to indicate that recording is possible. The number 6 indicates the remaining recording time and decreases while blinking by pressing SW2. When the recording time reaches 0, it displays 0 and stops blinking.

That is, recording is possible only while SW2 is pressed, and has a pause function. SW in recording mode
When 3 is pressed, PLY6 is displayed and the game enters a playback state, with the numbers decreasing while blinking and playing for 6 seconds until 0 is displayed.

It also has a pause function. Furthermore, even if the recording time does not expire, it is possible to play from the beginning by releasing SW2 and pressing SW3, and even if the playback time does not expire (by releasing SW3 and pressing SW2, it is possible to record from the beginning).

FIG. 4 is a system block diagram for driving the pointer display unit 2 of the embodiment shown in FIG. A step motor 15 is driven by a drive circuit 14. The rotation of the step motor, which is driven one step per second, is transmitted to the second hand 11, minute hand 10, and hour hand 9 via a reduction gear train to display the time.

FIG. 5 is a block diagram of a system that operates the driving and recording functions of the digital display section 2 of FIG. 1.

16 is a time reference oscillation circuit, a frequency dividing circuit, and a liquid crystal display device 17
Decoder, driver, external operation member 18 that drives
This is a central control circuit that includes a control circuit that controls the system in response to switch operations.

19 is a speaker that also serves as a microphone.

Reference numeral 20 denotes an amplifier circuit which, under the control of the central control circuit 16, amplifies the voltage of the audio signal from the speaker 19 through a band-pass filter during recording, and amplifies the current to drive the speaker 19 during playback.

21 is an analysis/synthesis LAM drive circuit that digitally encodes the input signal from the amplifier circuit 20 and writes it into the ItAM 22 under the control of the central control circuit 16, and reads the digital code from the ItAM 22 and demodulates it into an audio signal. .

The operation of the system is such that the central control circuit 16 displays the status on the liquid crystal display 17 by operating the external operating member 18, and also issues a control signal to the amplifier circuit 20 and the analysis/synthesis 1 (AM drive circuit 21). hour speaker 19
The input signal from the
Written to M22. In the playback state, the analysis and synthesis RAM
The digital code is read out from the ItAM 22 by the drive circuit 21, demodulated (synthesized) into an audio signal, and then sent to the amplifier circuit 20.
Then, the current is amplified to drive the speaker 19.

FIG. 6 shows a circuit diagram of the amplifier circuit 200 of FIG.

The signal C1 is a control signal from the central control circuit 16, which opens the gate 26.24 during recording and opens the operational amplifier 25.26.
is activated, and the operational amplifiers 27 and 28 are placed in a high impedance state. The opposite is true when sealing.

Similarly, signals C2 and C6 are generated by opening and closing gates 29.30 using control signals from the central control circuit 16 to analyze and synthesize 1 (the reproduced audio signal APLAY from the AM drive circuit 21 and the melody signal BZ from the central control circuit 16). This is a signal for making a selection.

The input amplifier during recording is composed of a bipolar transistor 61, an operational amplifier 25, 26, a three-stage amplifier with an R8C amplifier, and a bandpass filter, and the output A R
EC is the analysis/synthesis 1 (outputted to the AM drive circuit 21).

The output side amplifier during playback is an operational amplifier 27.28 and RC.
A band-pass filter and a push-pull circuit are formed by the cables, and the speaker 19 is driven in a push-pull manner.

FIG. 7 is a detailed block diagram of the analysis/synthesis 1$AM drive circuit 21 of FIG.

In this embodiment, the ADM (adaptive differential modulation) method is used as the audio encoding method, and the ADM method is a method in which the audio signal is sampled at a high frequency and the positive and negative 1 bits are extracted by comparing adjacent sample values. Furthermore, the quantization width is made variable, increasing the quantization width for sudden changes in audio, and reducing the quantization width for signals that rarely change, thereby keeping the sampling frequency relatively low. This method improves the ability to follow audio signals and reduces noise.

The analysis/synthesis RAM drive circuit 21 shown in FIG.
7. It consists of an address counter 68, and during recording, the audio signal MAREC from the amplifier circuit 20 is compared with the value of the D-A converter 36 one sampling before by the comparator 62, and depending on the magnitude, the value is positive (1) or negative (0). The pit data is output and input to the shift register 37 and simultaneously input to the data holding circuit 66.

Quantization intermediate p: The quantization width is determined by the circuit 34VC, and the previous digital amount is determined by the arithmetic circuit 65. An analog output is obtained by adding (or subtracting) lj) to -A converter 66. Then, at the next sampling time, the input signal A R
It is compared with EC by a comparator 32 and the next bit data is output.

The shift register 67 is for converting 1-bit 7 real data into 8-bit parallel data and sending it to the RAM 22. The shift register 67 outputs it in parallel to the address indicated by the address counter 68 and writes it into the RAM 22.

Conversely, during playback, 8-bit data is read from the RAM 22 and transferred serially to the data holding circuit 66, and the audio signal APLAY is demodulated by the quantum dead calculation circuit 34, calculation circuit 65, and D-A converter 66 and output to the amplifier circuit 20. .

FIG. 19 is a circuit configuration diagram, including a central control circuit IC chip 75, an amplifier circuit IC chip 76, and a voice analysis/synthesis RA.
The M drive circuit is composed of four ICs: an IC chip 86, a RAM 22, a crystal oscillator 81, a trimmer capacitor 82.1, a transistor 83, a capacitor, and a resistor.

Next, the structure of this embodiment will be explained.

Figure 8 is a plan view of the first stage of the mozzie seen from the dial side, Figure 9
The figure is a plan view of the first stage of the mozzie seen from the camera back side.
Figure O and Figure 12 are cross-sectional views of the main parts of the module.

The basic structure will be explained in accordance with FIG. The cut cloth 40 is glued. Speaker 19 is held in the case by OIJ song 1.

The pointer display module 42 is an independent module as shown in plan views in FIGS. 17 and 18, and has a battery 46, a clock ICAA stem motor 15, a wheel train 101, etc. It has a function guide display function, and when assembled into a case, it is positioned and connected to a digital display audio module by its external shape and stepped portion 45.

A dial 46, an hour hand 9, a minute hand 10, and a second hand 11 are pushed into and fixed to the pointer display module 42.

The digital display audio module has a laminated structure consisting of a pseudocrystal cell support frame 47 molded from plastic, a first circuit board 48, a circuit support base 49 molded from planutinok, and a second circuit board 50, as shown in FIG. It is positioned by four pillars 51 pushed into the liquid crystal cell support frame 47 and fixed by screws 52 as shown in FIG.

As shown in FIG. 12, the batteries 56 and 54 are housed in the battery compartment of the circuit support stand 49, and the battery side pressure springs 55 connect VDIll (OV) to the first circuit board 48 and the second circuit board 50. , Vss+ by Kameike receiving spring 56
, (1,5V) are connected to the 11th gl circuit board 50, and VBgll (-3V) is connected to both circuit boards by a battery receiving spring 57.

Between the first circuit board 48 and the second circuit board 50, electrical signals other than the power supply are transmitted through a dedicated power supply housed in a connector housing 58 provided on the circuit support base 47, as shown in FIG. They are connected by a connector 59 made of alternate layers of rubber and insulating rubber.

Further, the terminal plate 60 of the speaker and the first circuit board 48 are electrically coupled by a coil spring 63 housed in a coil spring housing section 61 of the liquid crystal cell support frame 47.

FIG. 10 shows a sectional view of the digital display section and the operation switch section. A windshield glass 65 is bonded to the body 1 of the case. The liquid crystal cell 6 is placed in the liquid crystal cell storage portion of the liquid crystal cell support frame 47.
6. A reflector plate 67 and a liquid crystal cell spacer 68 are housed.
The first circuit board 48 and the liquid crystal cell 66 are electrically connected by a liquid crystal cell connector 69 .

The Punoshhotan 6 is waterproofed by an O-ring 70 and is prevented from being removed from the body 1 by an E-ring 71. First circuit board 48
A switch terminal is arranged at a position corresponding to the bush button, and an insulating sheet 72 and a switch spring 76 are laminated for positioning. A round hole 74 is provided in the insulating sheet 72. The switch spring 76 is attached to the first circuit board 48 . The spherical part of the switch spring is in contact with D, and has a shallow spherical shape, and when the button 6 is pressed, the spherical part of the switch spring is depressed with a proper lick feeling, and the switch of the first circuit board 48 is pressed. It makes contact with the terminal and turns on the switch. Then, when the pushbutton 6 is released, the switch spring 76 returns and the contact is released.

The ventilation hole 75 in Fig. 8 is a ventilation hole that acoustically connects the space from the back of the speaker 19 and the space on the back cover side, and is intended to maximize the use of the space inside the watch as the back pressure volume of the speaker. It is.

13 and 14 are plan views of the first circuit board 48, and thin wires are omitted from the drawings. Central control circuit IC
A chip 75 and an amplifier circuit IC chip 76 are mounted by wire bonding.

Terminal 77 is a switch terminal, terminal 78 is a connection terminal with speaker 19, and terminal group 79 is an output terminal to liquid crystal cell 66. The terminal group 80 is a group of terminals connected to the second circuit board 50. The first circuit board 48 also includes a crystal oscillator 81, a trimmer capacitor 82, a transistor 86,
A chip capacitor 84 is mounted. The sealing frame 85 serves to prevent the potting resin from flowing during IC mounting.

15 and 16 are plan views of the second circuit board 50, on which a voice analysis and synthesis RAM drive circuit IC chip 86 is mounted by wire bonding, and a flat package RAM 22 is mounted by soldering.

In addition, a chip resistor 874 and a tantalum capacitor 88 for power backup are mounted.

The terminal group 89 is a group of terminals connected to the first circuit board 48 .

Terminal 90 is a VDD terminal, and terminal 91 is a V5g+1 terminal.

Effect of the invention] The system and structure of this embodiment have been explained above, but
An electronic timepiece system with a recording/playback function requires mounting a large number of ICs, and by distributing and mounting them on a plurality of substrates, the mounting yield can be improved and flexibility can be obtained in the arrangement of the parts of the timepiece. Also, as is clear from the circuit configuration diagram in Figure 19, since the driver circuits for KI(, AM and 1(AM) require a large number of data bus and address wiring, they are placed on the same board and the wiring on the board is By connecting with a pattern, it is possible to reduce the number of connection terminals between boards.This improves the reliability of the electrical connection between boards, and at the same time reduces the space required for the connector section. This is advantageous in making watches smaller, and the effect of implementing the present invention is on dogs.

[Brief explanation of the drawing]

The drawings all show embodiments of the present invention, and the first
2 is a plan view of the digital display segment, 3 is an operation flowchart, 4 is a system block diagram for driving the pointer display, and 5 is a plan view showing the external appearance of the watch.
The figure is a system block diagram that operates the digital display drive and recording function, Figure 6 is a circuit diagram of the amplifier circuit, and Figure 7 is a system block diagram that operates the digital display unit drive and recording function.
Figure 8 is a detailed block diagram of the analysis and synthesis RAM drive circuit.
The figure is a plan view of the module viewed from the dial side, Figure 9 is a plan view of the module viewed from the back cover side, Figures 10, 11, and 12 are sectional views of the main parts of the module, and Figure 13 is a plan view of the module viewed from the dial side. figure,
FIG. 14 is a plan view of the first circuit board. 15 and 16 are plan views of the second circuit board, FIGS. 17 and 18 are plan views of the pointer display module, and FIG. 19 is a circuit diagram. 2... Pointer display section, 3... Digital display section, 16... Central control circuit, 19... Speaker, 20... - Amplifier circuit, 21...Analysis and synthesis RAM drive circuit. Shin? Figure 5' (Δ

Claims (1)

[Claims] Time display members such as liquid crystal display devices, external operation members such as pushbuttons, audio input members such as speakers, audio output members, and clock function circuits including crystal oscillation circuits, timekeeping circuits, time display member drive circuits, etc. A control circuit that controls the entire system by operating external operating members, an amplifier circuit that amplifies the audio signal from the audio input member and drives the audio output member to output audio, and converts the input audio signal into digital code. A speech analysis circuit, a speech synthesis circuit that converts digital codes into speech signals, and a RAM that stores digital codes.
, write a digital code to RAMK)tA
In an electronic watch with a recording and playback function, which is made up of a circuit group such as a RAM drive circuit that reads data from the The IC is a RAM, and the circuit group is distributed and mounted on two or more circuit boards, and the RAM
An electronic clock with a recording and playback function characterized in that the RAM drive circuit and the RAM drive circuit are mounted on the same circuit board.