JPH0830741B2 - Luminescent needle power supply device - Google Patents

Description

The present invention relates to a power supply device for a light emitting needle.

[Prior Art and Problems to be Solved] The applicant of the present invention has proposed a power supply device for a pointer with a load in Japanese Patent Laid-Open No. 2-80995. The structure is as follows.

Below the pointer, two ring-shaped conductors are installed concentrically with the center of rotation of the pointer, and on the lower surface of the pointer, there are a pair of contact pieces each having a contact capable of sliding the ring-shaped conductor. It is provided. The ring-shaped conductor is electrically connected to an external circuit, and the contact piece is electrically connected to a load provided on the pointer.

According to this, when electric power is supplied from the external circuit to the two ring-shaped conductors, the contact pieces sliding on the ring-shaped conductors conduct electricity to the pair of contact pieces, and the power is further supplied to the load. What is supplied.

In such a contact brush method, when the contact slides on the ring-shaped conductor, it becomes a friction load due to the rotation of the pointer, and if the contact pressure of the contact with the conductor is reduced to reduce it, the reliability of conduction is impaired. I was afraid.

Therefore, as a solution to the drawbacks of the contact brush system, Japanese Patent Application No. 63-331196 proposes a power supply device for a pointer with a load. This is because the first coil provided on the lower surface of the pointer and the second coil provided below the pointer are closely opposed to each other, and when power is supplied to the second coil from an external power source, This is a rotary transformer system in which induced electric power is generated in the first coil and electric power is supplied from the first coil to the load provided on the pointer.

An example of use in a timepiece is shown as this embodiment, in which electric power is supplied from an external power source to the hour and minute hands by a contact brush system, and to the second hand by a rotary transformer system. Then, the electroluminescent elements provided on the hour hand, the minute hand and the second hand are caused to emit light.

However, the electroluminescence element must be driven by a low frequency signal due to the problem of life, and on the other hand, if the high frequency signal is not supplied to the rotary transformer, the transmission efficiency deteriorates. Therefore, in the above-mentioned structure, the life of the electroluminescent element which supplies a high frequency signal from the external power source is shortened. Further, when a low frequency signal is supplied, the transmission efficiency of the rotary transformer is poor and the reliability of the power supply to the second hand is low.

[Object of the Invention] Therefore, an object of the present invention is to provide a power supply device for a light emitting needle that can stably emit light from any of the hour hand, minute hand, and second hand, and that does not shorten the life of electroluminescence. Especially.

[Means for Solving the Problems] The present invention provides a drive signal generating means for generating a high frequency signal and a fixing member in a timepiece with a light emitting hand in which an electroluminescent element is provided in the hour and minute hands and a light emitting diode is provided in the second hand. And a hour hand brush device which is provided between the hour hand and a high frequency signal and which converts the high frequency signal supplied to the hour hand brush device into a low frequency signal and supplies the hour hand electroluminescent element with the hour hand. Converter, a minute hand brush device provided between the hour hand and minute hand and provided with a high frequency signal via the hour hand brush device, and converts the high frequency signal supplied to the minute hand brush device to a low frequency signal. , A minute hand converter that supplies the electroluminescent element for the minute hand, and a high-frequency signal that passes through the minute hand brush device that is provided between the minute and second hands. And a rotary transformer for transmitting it to the light emitting diode for the second hand.

Further, the second hand is provided with an electroluminescence element instead of the light emitting diode, and a second hand converter is provided which converts a high frequency signal passing through a rotary transformer into a low frequency signal and supplies the low frequency signal to the second hand electroluminescence element. You can also do it.

[Operation] In the present invention, a high frequency signal is transmitted to the hour hand and the minute hand by the contact brush method. And the electroluminescent elements provided on the hour and minute hands,
Each high-frequency signal is converted into a low-frequency signal by the converter and then supplied, and the electroluminescent element emits light. Since it is driven by a low frequency signal, the electroluminescence element has a long life. Then, the high frequency signal passing through the contact brush system of the hour and minute hands is transmitted to the rotary transformer, and the rotary transformer is driven with high efficiency. Then, the high frequency signal output from the rotary transformer is supplied to the light emitting diode, and the light emitting diode emits light.

When the second hand is also provided with an electroluminescent element, the high frequency signal output from the rotary transformer is converted into a low frequency signal by the second hand converter and then supplied to the second hand electroluminescent element. Since the electroluminescent element is driven by a low frequency signal, it has a long life.

Embodiments Embodiments of the present invention will be described with reference to the drawings.

 A first embodiment will be described with reference to FIGS.

As shown in FIG. 1, the bearing 2 fixed to the timepiece mechanical body 1 has an hour hand shaft 3, a minute hand shaft 4, and a second hand shaft 5 penetrating therethrough.
A fixed contact base 6 is press-fitted into the upper end of the bearing 2.
A ring-shaped protrusion 6a is provided on the upper surface of the fixed contact base 6 concentrically with the center of rotation of the pointer, and two ring-shaped fixed conductors 7 and 8 are arranged on the outside and inside of the protrusion 6a. Has been done. Part of each ring-shaped fixed conductor 7, 8 has an L-shaped connecting piece 7
a and 8a are bent, and the connecting pieces 7a and 8a are fixed contact blocks 6
Projecting from the lower surface of the lead wire and fixed to the lead wires 9a and 9b with solder 19 and connected. A high frequency signal is supplied to the lead wires 9a and 9b from the drive signal generating means S (second shown).

Above the fixed contact base 6, there is an hour hand fixed to the hour hand shaft 3.
10 are arranged. As shown in FIG. 3, a pair of contact pieces 12, 13 are fixed to the lower surface of the hour hand 10 via an insulating plate 11. The contact pieces 12 and 13 have contacts 12a and 13a, respectively. The contacts 12a and 13a are formed so as to slide on the ring-shaped fixed conductors 7 and 8, respectively, with concentric circles with respect to the rotation center of the hour hand 10 as loci of movement.

The hour hand brush device 14 is configured as described above. Then, electric power is supplied from the contact pieces 12 and 13 to the hour-hour electroluminescent element EL1 through the hour-hour converter 15. The hour hand converter 15 converts a high frequency signal into a low frequency signal.

On the upper surface of the hour hand 10, a contact block with the same structure as the fixed contact block 6.
16 is stuck. On the upper surface of the contact base 16, ring-shaped conductors 17 and 18 are provided on the outside and inside of the protrusion 16a. Connection piece 17
The a and 18a penetrate the contact point base 16 and project to the lower surface of the hour hand 10, and are fixedly connected to the contact pieces 12 and 13 with solder 19 respectively. Further, a minute hand 20 fixed to the minute hand shaft 4 is arranged above the hour hand 10. On the lower surface of this minute hand 20, the contact piece 1
A pair of contact pieces 22, 23 having the same structure as 2, 13 are fixed via an insulating plate 21. Contact points 22a, 2 provided on the contact pieces 22, 23
3a is formed so as to slide on the ring-shaped conductors 17 and 18 of the contact base 16.

The minute hand brush device 24 is configured as described above. Then, the electric power is supplied from the contact pieces 22 and 23 to the electroluminescent element EL2 through the minute hand converter 25. Like the hour hand converter 15, the minute hand converter 25 also converts a high frequency signal into a low frequency signal.

A minute hand side coil bobbin 26 made of a magnetic material is fixed to the upper surface of the minute hand 20 concentrically with the rotation center of the minute hand 20. A conducting wire is wound around the minute hand coil bobbin 26 to form a minute hand coil 27. Minute hand coil
27 is connected to the contact pieces 22 and 23. Above the minute hand 20,
A second hand 30 fixed to the second hand shaft 5 is provided. Second hand 30
A second hand side coil bobbin 36 formed of a magnetic material is fixed to the lower surface of the second hand 30 concentrically with the rotation center of the second hand 30 and closely faces the minute hand side coil bobbin 26. A conducting wire is wound around the second hand side coil bobbin 36 to form a second hand side coil 37.

The rotary transformer 34 is configured as described above. Then, a contact piece 3 is attached to the lower surface of the second hand 30 via an insulating plate 31.
2, 33 are fixed and the second hand side coil 37 to the contact piece 32, 33
Power is supplied to the light emitting diode L1 via the.

The hour hand 10, the minute hand 20, and the second hand 30 are fixed to the hour hand shaft 3, the minute hand shaft 4, and the second hand shaft 5 via the hooks 10a, 20a, and the pipe 30a, respectively, and are fixed to the dial plate receiver 35a. It is rotatable above 35.

With such a configuration, when the timepiece mechanical body 1 is driven to rotate the hour hand 10, the minute hand 20, and the second hand 30 to display the time, and when a high frequency signal is supplied from the drive signal generating means S, the lead wire Contacts 12a, 13a sliding from 9a, 9b to the ring-shaped fixed conductors 7, 8 and on the ring-shaped fixed conductors 7, 8
Is supplied to the contact pieces 12 and 13, and converted to a low frequency signal by the hour hand converter 15 and supplied to the hour hand electroluminescent element EL1. Since the electroluminescence element EL1 for hour hand is driven by a low frequency signal, the life can be extended.

Next, in the same manner, from the contact pieces 12 and 13 to the ring-shaped conductors 17 and 1.
8, via the contact pieces 22, 23, the high frequency signal is converted to the minute hand converter 2
Reached to 5. Then, the minute hand converter 25 converts it into a low-frequency signal, and the minute hand electroluminescence element.
Supplied to EL2. Electroluminescent element E for minute hand
L2 can have a long life.

Further, the contact pieces 22 and 23 are electrically connected to the minute hand side coil 27. When an alternating current flows through the minute hand side coil 27, an induced power is generated in the second hand side coil 37 due to the electromagnetic induction operation. The rotary transformer 34 efficiently transmits high frequency signals. Then, this high frequency signal is supplied to the light emitting diode L1 through the contact pieces 32 and 33.

Next, another embodiment will be described with reference to FIGS. The description of the same configuration as that of the first embodiment is omitted and the same reference numerals are used.

In the second embodiment, the second hand 30 is provided with a second hand electroluminescent element EL3 and a second hand converter 38. Then, from the second hand side coil 37 of the rotary transformer 31 to the converter 38 via the contact pieces 32, 33,
Furthermore, it is connected to the electroluminescent element EL3 for the second hand. Therefore, the second hand 30
The high frequency signal transmitted to the second hand is converted into a low frequency by the second hand converter 38, and then supplied to the second hand electroluminescent element EL3. Since the electroluminescent element EL3 for the second hand emits light by driving at a low frequency, it can have a long life.

[Effect] As described above, according to the present invention, the electroluminescent elements provided on the hour hand and the minute hand, or on the hour hand, the minute hand, and the second hand are driven by the low-frequency signal, and the light emission life is extended. Further, by supplying the high frequency signal, the transmission efficiency of the rotary transformer is increased and the reliability of the light emission of the second hand is increased. Since the power can be supplied to the second hand in a non-contact state, the second hand can be driven with low torque without affecting the rotation torque.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a block diagram showing its signal supply path, FIG. 3 is a rear view of an hour hand, FIG. 4 is a sectional view of another embodiment, and FIG. The figure is a block diagram showing a signal supply path of the above embodiment. 10 …… hour hand, 14 …… hour hand brush device, 15 …… hour hand converter, 20 …… minute hand, 24 …… minute hand brush device, 25 …… minute hand converter, 30 …… second hand, 34 …… rotary transformer , 38 ... Second hand converter, S ... Drive signal generating means, EL1, EL2, EL3 ... Electroluminescence element, L1 ... Light emitting diode.

Claims (2)

[Claims] 1. A timepiece with a light emitting hand in which an electroluminescent element is provided in the hour and minute hands and a light emitting diode is provided in the second hand, and a drive signal generating means for generating a high frequency signal is provided between the fixing member and the hour hand. An hour hand brush device provided with the high frequency signal and the high frequency signal supplied to the hour hand brush device are converted to a low frequency signal and supplied to the electroluminescent element for the hour hand. An hour hand converter, a minute hand brush device provided between the hour hand and the minute hand, and supplied with the high frequency signal via the hour hand brush device, and the high frequency wave supplied to the minute hand brush device. A minute hand converter that converts a signal to a low frequency signal and supplies it to the electroluminescent element for the minute hand, the minute hand and the second hand And a rotary transformer for supplying the high-frequency signal via the brush device for the minute hand and transmitting the high-frequency signal to the light-emitting diode for the second hand, the power supply device for the light-emitting needle. . 2. A timepiece with a light-emitting hand, in which electroluminescent elements are respectively provided on the hour and minute hands and the second hand, drive signal generating means for generating a high frequency signal, and between the fixing member and the hour hand, and the high frequency wave. A brush device for an hour hand to which a signal is supplied, the high frequency signal supplied to the brush device for an hour hand is converted into a low frequency signal, and a converter for an hour hand is supplied to the electroluminescent element for the hour hand, and A minute hand brush device provided between the hour hand and the minute hand and supplied with the high frequency signal via the hour hand brush device, and the high frequency signal supplied to the minute hand brush device into a low frequency signal. A converter for a minute hand that converts and supplies the electroluminescent element for the minute hand, and is provided between the minute hand and the second hand, A rotary transformer to which the high-frequency signal is supplied via the minute hand brush device, and a second hand that converts the high-frequency signal via the rotary transformer into a low-frequency signal and supplies it to the electroluminescent element for the second hand. Power supply device for a light emitting needle, comprising: