JP3650442B2 - Clock lighting equipment - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a timepiece illumination device that can read time even in the dark.
[0002]
[Prior art]
The time of the clock is normally read by room lighting at night, but cannot be read after the light is turned off. Conventionally, a watch is provided with an illumination and a lighting button as means for enabling reading after the light is turned off.
[0003]
In addition, there are many table clocks and wall clocks that are configured to emit light during darkness or in the dark.
[0004]
[Problems to be solved by the invention]
However, the lighting button method requires hand movement for lighting, and it is inconvenient to find where the lighting button is attached in the dark, and the operation of the watch by accidentally pressing another button There was also a lot of confusion. Furthermore, during sleep, it was necessary to get up and operate from the bed, and it was very annoying. In addition, if the button for illumination is pressed for a long time, there is a problem that the power consumption of the battery is large.
[0005]
For this reason, the place where the luminous watch is placed is limited to the length of the cord from the outlet, and there is an inconvenience that the place cannot be freely selected. Moreover, it was not used at all for wristwatches attached to the body at all times.
On the other hand, the system that always emits light in the dark is very uneconomical if a battery is used, so a household power supply is used.
[0006]
The inventor has wondered how to illuminate the watch in the dark over a long period of time with a battery. Therefore, in order to reduce battery consumption as much as possible, we thought that it would be necessary to perform an operation of lighting when it was dark and to use intermittent lighting instead of continuous lighting during the dark.
[0007]
For example, if the continuous illumination for 1 minute is changed to the intermittent illumination for 10 seconds, the battery life is considered to be extended six times. In addition, as a device that performs intermittent illumination, the power consumption of the battery for illumination is consumed only during the operation of illumination, and the energization current that flows through the circuit of the device is minimized as long as there is no operation. It is thought that lighting in the dark for a long time is possible.
[0008]
In view of the above circumstances, the present invention automatically performs illumination in the dark, so that a troublesome manual operation such as pressing a button for reading the time is not required, and intermittent illumination is performed. Therefore, an object of the present invention is to provide a watch lighting device that consumes less battery power.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, in a battery built-in watch provided with a light emitter that illuminates a dial, at least one magnetic sensor for obtaining a flashing signal of the light emitter is provided in a rotation range of a second hand. The second hand is provided with a magnet for operating the magnetic sensor, and provided with a driving device having a circuit for driving the magnetic sensor and the light emitter, and the circuit for driving the magnetic sensor is a circuit that detects darkness. The circuit for driving the light emitter is provided with a capacitor, and when the second hand magnet reaches the position of the magnetic sensor, the magnetic sensor is activated to charge the capacitor while lighting the light emitter. The watch lighting device is configured to emit light until the charging current of the capacitor disappears when the second hand magnet is detached from the magnetic sensor .
[0010]
An LED lamp may be used as the light emitter, a reed switch as the magnetic sensor, and a CdS photoconductive cell as the optical sensor. In addition, a plurality of second hands may be provided at different angles.
[0011]
Next, in the second hand of the timepiece according to the present invention, a second hand having the same length may be provided on the opposite side with the second hand held as a center, and a magnet may be provided on each second hand.
Furthermore, the second hand of the timepiece according to the present invention may be provided in a cross shape with a portion holding the second hand as a center, and a magnet may be provided on each second hand.
In addition, the second hand of the timepiece according to the present invention is usually provided at the forefront among the hands, but the mounting position of the second hand, the shape of the second hand, the character of the timepiece of the magnet provided on the second hand The position of the magnetic sensor provided on the board and the method of attaching them are not particularly limited.
[0012]
In addition, each component used in the circuit of the device according to the present invention may be another component as long as the operation of the device is the same (for example, in the case of a relay, a photo coupler, etc.).
Furthermore, a circuit excluding the optical sensor, magnetic sensor, relay, light emitter, semi-fixed resistor, electrolytic capacitor, and battery of the device according to the present invention may be an integrated circuit.
[0013]
[Operation]
Since the lighting device of the watch is configured as described above, the circuit for driving the magnetic sensor and the light emitter is opened when the light sensor reaches darkness at dusk, so the second hand magnet is positioned at the magnetic sensor position. When the magnetic sensor is reached, the light emitter is turned on, and when the second hand magnet is removed from the magnetic sensor, the light emitter is turned off.
[0014]
The lighting time of the luminous body is only during the time when electricity charged in the electrolytic capacitor is energized to the base of the transistor through the constant current circuit. Further, the time interval at which the light emitter is turned on decreases with an increase in the number of magnetic sensors and the number of second hands. In any case, since the lighting of the light emitter is intermittent, battery consumption is low.
[0015]
【Example】
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view showing the structure of the timepiece 1 and its driving device 10. FIG. 2 is a cross-sectional view taken along line AA in which an internal mechanism of the timepiece of FIG. 1 is omitted. FIG. 3 is a circuit diagram of FIG.
First, in the embodiment of the present invention, a reed switch is among those that are relatively easy to use as a magnetic sensor. Therefore, the reed switches 8a, 8b, 8c, and 8d are used as the magnetic sensor. Since the reed switches 8a, 8b, 8c, and 8d used in this apparatus have a small energizing current to be supplied to the apparatus, the reed switches 8a, 8b, 8c, and 8d having the smallest moving value (AT) and the smallest maximum energizing current (A) were used. Therefore, the magnets 4a, 4b, 4c, and 4d that operate the reed switches 8a, 8b, 8c, and 8d can be particularly small and light even if the magnetic force is weak. In the embodiment of the present invention, an LED lamp was used as a light emitter, and a CdS photoconductive cell was used as a photosensor. First, in FIG. 1, an LED lamp 9a is provided at the lower end of the timepiece 1 (just below time 6), and a magnet 4a is fixed to the tip of the second hand 3a. The CdS photoconductive cell 7 (below time 12) is fixed to the dial 2, and the reed switch 8a is provided at the time 12 position. When the second hand 3a arrives, the second hand 3a is provided directly below the magnet 4a fixed to the second hand 3a.
[0016]
The reason why the LED lamp (light emitting diode) is used is that it is lit with less current than other various light sources that emit light from the battery, and generates very little heat. Therefore, battery consumption is very low. Also, depending on the color and size of the light emitted, if one LED lamp is operated at a current of 20 milliamperes, there is a light intensity of 7,000 to 8,000 millicandelas (corresponding to 7 to 8 candles, red). is there.
[0017]
Further, as shown in FIG. 2, when the magnet 4a is directly above the reed switch 8a, the distance between them is set to an appropriate distance at which the magnet 4a can act on the reed switch 8a. The weight of the magnet 4a is such that the second hand 3a does not hinder the rotation on the dial 2.
[0018]
The driving device 10 includes the entire circuit. The remaining circuit in which the CdS photoconductive cell 7, the reed switch 8a, and the LED lamp 9a are fixed to the timepiece 1 from the circuit shown in FIG. The circuit portion except for the battery is modularized, and the portion is connected to the CdS photoconductive cell 7, the reed switch 8 a, and the LED lamp 9 a fixed to the timepiece 1 by the flat cable 6.
In addition, the lighting interval of this Example 1 is 1 minute.
[0019]
The apparatus of the first embodiment operates as follows.
When the second hand 3a provided with the magnet 4a reaches the reed switch 8a, the magnet 4a acts on the reed switch 8a. At that time, if it is dark enough that the circuit is operated by the CdS photoconductive cell 7, the transistor T1 operates, and the reed switch 8a connected to the collector of the transistor T1 is energized from the battery E through the exciting coil of the relay L1. On the other hand, if it is bright, there is almost no resistance value of the CdS photoconductive cell 7, so that a short circuit occurs and the subsequent circuit does not work.
[0020]
However, when the light state gradually shifts to a dark state, or when the light state gradually shifts to a bright state, the resistance value of the CdS photoconductive cell 7 gradually changes, and the switching operation of the circuit within a certain range. Becomes unstable. In order to solve the state, a Schmitt trigger circuit is provided between resistors R1, R2, semi-fixed resistor V1 and resistor R5 using resistors R3, R4 and CMOS-ICI1, I2. is there. In addition, when the resistor R2 and the semi-fixed resistor V1 are not provided in the circuit, the CdS photoconductive cell 7 is not suitable for a dim day such as a cloudy day depending on the place where the watch is mounted or placed. Since the resistance value increased from the daytime and the circuit was in operation, a resistor R2 was provided in series with the CdS photoconductive cell 7 and a circuit was provided in parallel with the semi-fixed resistor V1. Then, the operation timing of the circuit can be adjusted by the semi-fixed resistor V1.
[0021]
Therefore, when the exciting coil of the relay L1 is energized, the contact of the relay L1 is turned on (contacted), and the electrolytic capacitor C1 connected to the contact is charged. Then, the base of the transistor T2 is energized through the field effect transistor F1. Thus, the amplified energizing current from the battery E to the emitter of the transistor T2 is energized to the LED lamp 9a connected to the collector to emit light.
[0022]
Since the electrolytic capacitor C1 is charged, even if the contact of the relay L1 is turned off, the electrolytic capacitor C1 continues to be discharged from the electrolytic capacitor C1 toward the field effect transistor F1 until there is no charging current. The discharge time varies depending on the capacitance of the electrolytic capacitor C1 and the resistance value of the semi-fixed resistor V2.
Further, since the field effect transistor F1 and the semi-fixed resistor V2 form a constant current circuit, the current discharged from the electrolytic capacitor C1 is kept constant, and the base of the transistor T2 is energized. Then, the amplified current flowing from the collector of the transistor T2 toward the emitter is constant, and the light emission state of the LED lamp 9a connected to the collector is constant. The light emission time can be adjusted by adjusting the constant current amount by adjusting the semi-fixed resistor V2.
[0023]
Therefore, when the magnet 4a of the second hand 3a that has reached the top of the reed switch 8a is separated, the contact of the reed switch 8a is turned off and is not energized.
The resistance value of the CdS photoconductive cell 7 increases due to the darkness, and the Schmitt trigger circuit detects a change in the resistance value, and the circuit is operable. However, the circuit does not operate because no current is supplied from the reed switch 8a. At this time, the current flowing through the circuit is such that while the electricity charged in the electrolytic capacitor C1 passes through the constant current circuit and is discharged toward the base of the transistor T2, the amplified current passes through the LED lamp 9a and the collector of the transistor T2. Only the energizing current that causes the LED lamp 9a to emit light through the emitter is obtained. After that, no current is supplied to the entire circuit until the next time the magnet 4a of the second hand 3a reaches the reed switch 8a.
[0024]
When the light is bright, the resistance value of the CdS photoconductive cell 7 is zero or close to zero, so that a current flows through the CdS photoconductive cell 7 to the negative side, and the Schmitt trigger circuit Since the change cannot be detected and the circuit does not operate, the consumed current is very little energized for 1 second when the magnet 4a of the second hand 3a reaches the reed switch 8a.
[0025]
Next, a second embodiment will be described with reference to FIGS. FIG. 4 is a front view of the timepiece 1. FIG. 5 is a partial circuit diagram of the timepiece 1 in which two LED lamps 9a and 9e are fixed (at times 9 and 3 respectively). That is, the LED lamp 9e circuit is added in parallel with the LED lamp 9a circuit. This Example 2 can be applied to Examples 3 to 10 later. In addition to the LED lamps 9a, 9e, one or more circuits may be added in parallel.
[0026]
FIG. 6 is a front view of the timepiece 1 showing the third embodiment. The CdS photoconductive cell 7 (below time 12) is fixed to the dial 2 of the timepiece 1, and the reed switches 8a and 8b (time 12 and 6). ) Are fixed, and a reed switch 8b in the circuit diagram of FIG. 3 is added in parallel or a reed switch 8c, 8d in the circuit diagram of FIG. 9 is omitted. In the circuit diagram of FIG. 3, the drive unit 10 according to the third embodiment is obtained by modularizing a circuit portion excluding other batteries. In this example 3, the lighting interval is 30 seconds.
[0027]
FIG. 7 is a front view of the timepiece 1 showing the fourth embodiment. The CdS photoconductive cell 7 (below time 12) is fixed to the dial 2 of the timepiece 1, and the reed switches 8a, 8b, 8c (time 12). 8 and 4) are fixed to each other, and the reed switches 8b and 8c are added in parallel to the reed switch 8a in the circuit diagram of FIG. 3, or the reed switch 8d is removed from the circuit diagram of FIG. FIG. 4 is a circuit diagram of the fourth embodiment, and the drive device 10 of the fourth embodiment is obtained by modularizing a circuit portion other than the battery. The lighting interval of this Example 4 is 20 seconds.
[0028]
FIG. 8 is a front view of the timepiece 1 showing the fifth embodiment. A CdS photoconductive cell 7 (below time 12) is fixed to the dial 2 of the timepiece 1, and the reed switches 8a, 8b, 8c, 8d ( The four times 12, 9, 6, and 3) are fixed, and FIG. 9 is a circuit diagram thereof. The drive unit 10 according to the fifth embodiment is obtained by modularizing the circuit portion excluding other batteries. In this example 5, the lighting interval is 15 seconds.
[0029]
A sixth embodiment will be described with reference to FIGS. 10 and 11. FIG. 10 shows a second hand 3b of the same length provided on the opposite side with the holding portion 5 of the second hand 3a shown in FIG. 1 as the center, and a magnet 4b fixed to the tip, and FIG. 10 is a rear view thereof. FIG. 11 is a front view of the timepiece 1 of the sixth embodiment, and the lighting interval is 30 seconds.
[0030]
A seventh embodiment will be described with reference to FIGS. In FIG. 12, second hands 3b and 3c having the same length are provided at angles of 120 degrees to the left and right with respect to the holding portion 5 of the second hand 3a shown in FIG. 1, and magnets 4b and 4c are fixed to the tips of the second hands, respectively. The second hands were 3b and 3c. FIG. 12 is a rear view thereof. FIG. 13 is a front view of the timepiece 1 showing the seventh embodiment, and the lighting interval is 20 seconds.
[0031]
An eighth embodiment will be described with reference to FIGS. 14 and 15. FIG. 14 shows the shape of the second hand 3a shown in FIG. 1 centered on the holding part 5 and the second hand of the same length on the opposite side to the left and right angles of 90 degrees and arranged in a cross shape around the holding part 5. Magnets 4b, 4c, 4d were fixed to the tip, and the second hands were 3b, 3c, 3d. FIG. 14 is a rear view. FIG. 15 is a front view of the timepiece 1 showing the eighth embodiment, and the lighting interval is 15 seconds.
[0032]
A ninth embodiment will be described with reference to FIGS. 16 and 17. FIG. 16 is a front view of the timepiece 1 showing the ninth embodiment. A CdS photoconductive cell 7 (below time 12) is fixed to the dial 2 of the timepiece 1, and two reed switches 8a and 8b (time 12 and 6) are fixed. Two LED lamps 9a and 9b are arranged side by side at the lower end of the timepiece 1 (below time 6). FIG. 17 is a circuit diagram thereof, but the circuits from the resistors R1 and R2 to the CMOS-ICI2 and the resistor R4 in the circuit diagram of FIG. The drive device 10 of the ninth embodiment is a circuit diagram of two circuits provided in parallel from the reed switch 8b as a transistor T3, and other circuit parts excluding batteries are modularized.
[0033]
The operation is such that when the entire circuit is operable, when the second hand 3a reaches the reed switch 8a, the magnet 4a of the second hand 3a acts on the reed switch 8a, and the circuit connected to the reed switch 8a operates. The LED lamp 9a emits light.
When the second hand 3a reaches the reed switch 8b, a circuit connected to the reed switch 8b is activated and the LED lamp 9b emits light.
In the ninth embodiment, it is preferable that the LED lamps 9a and 9b emit light with different emission colors (for example, the LED lamp 9a is red and the LED lamp 9b is green). The lighting interval is 30 seconds.
[0034]
A tenth embodiment will be described with reference to FIGS. FIG. 18 is a front view of the timepiece 1 showing the tenth embodiment. A CdS photoconductive cell 7 (below time 12) is fixed to the dial 2 of the timepiece 1, and the reed switches 8a, 8b, 8c, 8d ( At time 12, 3, 6, and 9), four LED lamps 9 a, 9 b, 9 c, and 9 d are attached to the periphery (under time 6, left at time 9, above time 12, and right at time 3). FIG. 19 is a circuit diagram thereof, and a circuit obtained by removing the resistor R5, the transistor T1, and the battery E from the circuit diagram of FIG. 17 is the same circuit in the upper part of FIG. 8d is provided as a transistor T5 and displayed as a circuit diagram of four circuits, and the other circuit parts excluding the battery are modularized in the driving device 10 of the tenth embodiment.
[0035]
When the second hand 3a reaches the reed switch 8a when the entire circuit is operable, the magnet 4a of the second hand 3a acts on the reed switch 8a to activate the circuit connected to the reed switch 8a. The lamp 9a emits light.
Next, when the second hand 3a reaches the reed switch 8b, the magnet 4a of the second hand 3a acts on the reed switch 8b, the circuit connected to the reed switch 8b is activated, and the LED lamp 9b emits light.
[0036]
Also in the case of the reed switches 8c and 8d, when the second hand 3a reaches the reed switches 8c and 8d, the magnet 4a of the second hand 3a acts on the reed switches 8c and 8d to connect to the reed switches 8c and 8d. The circuit is activated and the LED lamps 9c and 9d emit light. In addition, the lighting interval of this Example 10 is 15 seconds. In addition, it is desirable to use a light emitting color different from that in Example 10.
Example 11 will be described with reference to FIGS. 3, 9, 17, and 19. FIG. First, the resistors R1 to R7, transistors T1 and T2, field effect transistor F1, diode D1, CMOS-ICI1, I2, and FIG. 17 are omitted resistors R1 to R9, transistors T1 to T3, field effect transistors F1 and F2, diodes D1 and D2, omitted portions CMOS-ICI1 and I2, and omitted portions resistors R1 to R1 in FIG. Resistor R13, transistors T1 to T5, field effect transistors F1 to F4, diodes D1 to D4, and omitted portions of CMOS-ICI1 and I2 are 1 circuit, 1 circuit, 2 circuits, 4 circuits hybrid IC (hybrid integrated circuit), respectively As described above, one or more than one element is used.
[0037]
【The invention's effect】
As described above, according to the illumination device of the watch of the present invention, in the dark, the circuit is opened by the detection of the light sensor, and the automatic illumination state is obtained. For example, even if a clock is placed in a place that is out of reach during sleep, the time can be read, which is very convenient without having to wake up.
[0038]
Also, when the second hand magnet reaches the position of the magnetic sensor, the magnetic sensor is activated and the light emitter is turned on, and when the second hand magnet is removed from the magnetic sensor, the light emitter is turned off, resulting in intermittent illumination. Even so, battery consumption is relatively small, and the use of batteries becomes economical.
[0039]
Further, since an LED lamp having a high capability and a low calorific value is used as a light emitting source, this also reduces battery consumption, and is particularly suitable as a watch placed close to the user.
[0040]
Further, since the second hand is used for the intermittent operation of lighting, the circuit configuration is simplified, and in addition, the intermittent time can be freely set by the number of magnetic sensors and second hands, which is convenient in manufacturing.
[Brief description of the drawings]
FIG. 1 is a front view showing a first embodiment including a timepiece and a driving device according to the present invention.
2 is a cross-sectional view taken along the line AA in which an internal mechanism of the timepiece of FIG. 1 is omitted.
FIG. 3 is a circuit diagram according to the first embodiment.
4 is a front view showing a timepiece according to Embodiment 2. FIG.
FIG. 5 is a partial circuit diagram according to the second embodiment.
6 is a front view of a timepiece showing Example 3. FIG.
7 is a front view of a timepiece showing Example 4. FIG.
8 is a front view of a timepiece showing Example 5. FIG.
9 is a circuit diagram of Embodiment 5. FIG.
10 is a rear view showing the structure of a second hand used in Example 6. FIG.
11 is a front view of a timepiece showing Example 6. FIG.
12 is a rear view showing the structure of a second hand used in Example 7. FIG.
13 is a front view of a timepiece showing Example 7. FIG.
14 is a rear view showing the structure of a second hand used in Example 8. FIG.
15 is a front view of a timepiece showing Example 8. FIG.
16 is a front view of a timepiece showing Embodiment 9. FIG.
FIG. 17 is a main part circuit diagram of Embodiment 9.
18 is a front view of a timepiece showing Example 10. FIG.
19 is a principal part circuit diagram of Embodiment 10. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Clock 2 Dial 3a, 3b, 3c, 3d Second hand 4a, 4b, 4c, 4d Magnet 5 Holding part 6 Flat cable 7 CdS photoconductive cell 8a, 8b, 8c, 8d Reed switch 9a, 9b, 9c, 9d, 9e LED lamp 10 Driving device C1, C2, C3, C4 Electrolytic capacitors D1, D2, D3, D4 Diode E Batteries F1, F2, F3, F4 Field effect transistors I1, I2 CMOS-IC
L1, L2, L3, L4 Relays R1, R2, R3, R4, R5 Resistors R6, R7, R8, R9, R10 Resistors R11, R12, R13, R14 Resistors T1, T2, T3, T4, T5 Transistor V1 , V2, V3, V4, V5 Semi-fixed resistors

Claims (3)

In a battery built-in watch provided with a light-emitting body that illuminates the dial, at least one magnetic sensor for obtaining a flashing signal of the light-emitting body is arranged in the rotation range of the second hand, and a magnet for operating the magnetic sensor is disposed on the second hand Install,
A driving device having a circuit for driving the magnetic sensor and the light emitter;
The circuit for driving the magnetic sensor is equipped with a light sensor that detects darkness and opens the circuit,
A circuit for driving the light emitter is provided with a capacitor,
When the second hand magnet reaches the position of the magnetic sensor, the magnetic sensor is actuated to charge the capacitor while turning on the light emitter, and when the second hand magnet is removed from the magnetic sensor, light is emitted until the charging current of the capacitor disappears. A timepiece illumination device. At least one reed switch that obtains the flashing signal of the LED lamp is arranged in the rotation range of the second hand, and a magnet for operating the reed switch is attached to the second hand, and a circuit for driving the reed switch and the LED lamp is provided. 2. The timepiece illumination device according to claim 1, wherein the driving device includes a CdS photoconductive cell that senses darkness and opens a circuit. 3. The timepiece illumination device according to claim 1, wherein a plurality of second hands are provided at different angles.

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