JPH03144397A - Electric power supply device for pointer with load - Google Patents

Abstract

PURPOSE:To supply electric power without influence to the rotating torque of a second hand by generating a magnetic flux in a circumference by allowing alternating current to flow in a fixed coil so as to allow current to flow in the fixed coil and a second hand coil under the influence of the magnetic flux. CONSTITUTION:A fixed coil 37 is connected to an intermediate plate 4 closely facing to a second hand coil 36. And an hour hand 13, a minute hand 14 and a second hand 15 are rotated being driven by a clock mechanical body 1 to display time while, when electric power is supplied to the fixed coil 37 with the use of an electric power supply means, induced electromotive force is induced in the second hand coil 36 by electromagnetic induction. And it is transmitted to a first armature 34 and a second armature 35 through conductive plates 32, 33 provided on a second hand shaft 29 and furthermore the electric power is supplied to an EL element 16 through connection plates 21, 22. By such an electric power supply device, the electric power is supplied without giving influence to the rotation torque of the second hand.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply device for a loaded pointer.

[Prior art and its problem to be solved 8] The present applicant has proposed a power supply device for a power pointer with a power supply in Japanese Patent Application No. 63-233974. Its structure is as follows.

At the rear of the pointer, two ring-shaped conductors are installed concentrically with the center of rotation of the pointer, and on the back of the pointer, there is a pair of contact pieces each having a contact point that can slide on the ring-shaped conductor. It is a provision. 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 power is supplied from an external circuit to two ring-shaped conductors, the contact sliding on the ring-shaped conductors conducts electricity to a pair of contact pieces, and then power is supplied to the load. It is something that will be done.

In such a contact brush type, when the contact slides on the ring-shaped conductor, the rotation of the pointer causes a frictional load, and reducing the contact pressure of the contact with the conductor to reduce this load improves the reliability of continuity. There was a risk of damaging the

Therefore, as a solution to the drawbacks of the contact brush method,
In Japanese Patent Application No. 63-331196, a power supply device for a power pointer with a power supply is proposed. This is because a first coil provided on the back of the pointer and a second coil provided at the rear of 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 power is generated in the first coil and power is supplied from the first coil to a load provided on the pointer.

As an example of this, an example is shown in which it is used in a payment meter, in which power is supplied from an external power source to the hour and minute hands using a contact brush system, and to the second hand using a rotary transformer system. There is.

However, since the two coils are provided in the gap between the minute hand and the second hand, the gap becomes large, and the two coils are exposed, which detracts from the aesthetics. If the coil is made too small, the transmission efficiency of the rotary transformer will deteriorate.
Continuity reliability has decreased.

[Object of the Invention] Therefore, an object of the present invention is to provide a power supply device for a pointer with a negative Gj using a rotary transformer method, which has high reliability of conduction without impairing the aesthetic appearance.

[Means for achieving the object] The power supply device for a loaded pointer according to the present invention has a conductive coating formed on the outer periphery of the intermediate portion via an insulating coating, and the rear end protrudes from the watch mechanical body. a second hand shaft, a second hand fixed to the tip of the second hand shaft, a first contact piece fixed to the back of the second hand and in elastic contact with the tip of the second hand shaft, and a second hand fixed to the back of the second hand. and a second contact piece that comes into elastic contact with the conductive wave membrane, a load provided on the second hand and connected to the first and M2 contact pieces, and an rMH at the rear end of the second hand shaft.
The second hand coil has both ends connected to the second hand shaft and a conductive coating, and a fixed coil that is fixed to the watch mechanical body, faces closely to the second hand coil, and is supplied with power from the outside. It is characterized by the fact that

In addition, the second hand shaft is made of an insulating material and has two grooves in the axial direction, two conductive plates are attached to the two grooves, the second hand is fixed to the tip of the second hand shaft, and the second hand shaft is made of an insulating material and has two grooves in the axial direction. a first contact piece fixed to the back surface and in elastic contact with one of the conductive plates; a second contact piece fixed on the back surface of the second hand and in elastic contact with the other conductive plate; A second hand coil is fixed to the rear of the second hand shaft and has both ends connected to the two conductive plates, and a second hand coil is fixed to the watch mechanical body. It may also be configured to include a fixed coil that faces the second hand coil in close proximity and is supplied with power from the outside.

[Function] In the present invention, the fixed coil is electrically connected to an external circuit, and an alternating current is flowing through the fixed coil. When an alternating current flows through the fixed coil, a magnetic flux is generated around it, which constantly changes. Under the influence of this change in magnetic flux, a voltage is generated in the second hand coil, which is closely opposed to the fixed coil, and a current flows.

Due to the action of such electromagnetic induction, power is supplied from the fixed coil connected to the external circuit to the second hand coil at the rear of the second hand shaft. In the first configuration according to the present invention, the second hand shaft and the conductive coating are electrically connected, and power is further supplied to the load on the second hand via the first and second contact pieces. Further, in the second configuration according to the present invention, electric power is supplied to the load on the second hand through the two conductive plates and the first and second contact pieces.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

First, a first embodiment will be described based on FIGS. 1 to 4.

In the timepiece mechanical body 1, a drive wheel 2 that is rotationally driven by a rotor (not shown) is held by an upper case 3 and a middle plate 4. The intermediate wheel 5 is held by the upper case 3 and the middle plate 4, and the day wheel 6 is held by the middle plate 4 and the lower case 7. The second hand shaft 81, the minute hand shaft 9, and the hour hand shaft 10 held in the upper case 3 are coaxially fitted and attached to the lower case 7.
It penetrates the bearing part 7a and protrudes forward.

At the same time as the second hand shaft 8 is rotated by the drive wheel 2, the minute hand shaft 9 is rotated from the second hand shaft 8 via the intermediate wheel 5. Further, the minute hand shaft 9 passes through the hour hand shaft 10 via the minute wheel 6.
is configured to be rotated.

The bearing part 7a of the watch mechanical body 1 is connected to the dial holder 11 and the dial 1.
It passes through 2. The hour hand shaft 101, the minute hand shaft 92, and the second hand shaft 8, which protrude through the bearing portion 7a, have a hook 13a.
, 14a, and an hour hand 131, a minute hand 149, and a second hand 15 are fixed through pipes 15a, respectively. The second hand 15 is provided with a load 16 such as an electroluminescent element (hereinafter referred to as an "rEL element").

The second hand shaft 8 is made of a conductive material such as metal, and a conductive coating 18 is formed on the outer periphery of the intermediate portion via an insulating wave 1!17.
is formed. Further, a second hand gear 19 is fixed.

As shown in Figure 2.3, there is an insulating plate 2 on the back of the second hand 15.
Connecting plates 21, 22 are fixed via 0. The connecting plates 21, 22 are connected to the EL element 16 (first shown), and the first contact pieces 23, 22 are connected to the EL element 16 (first shown). The second joints 24 are each fixed with solder 25. And the first
The contact piece 23° and the second contact piece 24 extend along the pipe 15a, and the first contact piece 23 is attached to the tip of the second hand shaft 8, and the second contact piece 24 is attached to the conductive coating 17, respectively. are in contact with each other.

As shown in FIG. 4, the rear end portion of the second hand shaft 8 protrudes through the upper case 3 and is rotatably supported by a fixing member 26 fixed to the upper case 3.

A second hand coil 27 is fixed to the second hand shaft 8, one end of the second hand coil 27 is attached to the second hand shaft 8, and the other end is a conductive wave If! 1
17, respectively. And the fixing member 26
A fixed coil 28 is fixed to the second hand coil 27.
are closely facing each other. The second hand shaft 8 passes through the center hole 28a of the fixed coil 28 at intervals.
Reference numeral 8 is a device to which power is supplied from a power supply means (not shown).

With such a configuration, the hour hand 131, minute hand 141, and second hand 15 are driven by the watch mechanical body 1 to rotate to display the time, and when power is supplied to the fixed coil 28 from the power supply means, electromagnetic induction is generated. Due to this action, induced power is generated in the second hand coil 27.

The power is then transmitted to the first contact piece 23 and the second contact piece 24 through the second hand shaft 8 and the conductive coating 17, and is further supplied to the EL@116 via the connection plates 21 and 22.

Next, a second embodiment will be described based on FIGS. 5 to 7.

The watch mechanical body 1 is almost the same as the first embodiment, and includes an upper case 3. Middle plate 4. The lower case 7 allows the drive vehicle 2. An intermediate wheel 51, a back wheel 69, a second hand shaft 291, a minute hand pongee, a 91 hour hand shaft 10 are held. The hour hand shaft 102, the minute hand shaft 91, and the second hand shaft 29, which protrude through the dial support 112, the dial plate 12, and the bearing part 7a, have hooks 13a, 14a, and a pipe 1.
An hour hand 131, a minute hand 141, and a second hand 15 are fixed to each other via 5a. The second hand 15 has a load 16 such as an EL element.
is provided.

The second hand shaft 29 shown in FIG. 7 is made of an insulating material, and is provided with two grooves 30 and 31 in the axial direction.

Conductive plates 32.33 are attached to the grooves 30.31, respectively.

At this time, the depth of the conductive plate 32.3 is greater than the depth of the groove 30.31.
Since the thickness of the second hand shaft 29 is smaller, the conductive plates 32 and 33 do not protrude beyond the outer periphery of the second hand shaft 29 and do not interfere with the rotation of the second hand shaft 29.

As shown in FIG. 6, an insulating plate 20 is provided on the back of the second hand 15.
Connecting plates 21,22 are fixed via the connecting plates 21,22. The connecting plates 21 and 22 are connected to the EL cable 16 (shown in the fifth figure), and a first contact piece 34 and a second contact piece 35 are respectively fixed thereto.

and the first contact piece 34. The second contact piece 35 is the vibrator 15a
The first contact piece 34 extends along the conductive plate 32 and the second contact piece 34 extends along the conductive plate 32 .
The contact pieces 35 are pressed into contact with the conductive plate 33, respectively.

A second hand gear 29a is integrally formed on the second hand shaft 29.
A second hand coil 36 is fixed on the second hand gear 29a, and the second hand coil 36 is connected to conductive plates 32 and 33. Further, a fixed coil 37 is connected to the middle plate 4 and is closely opposed to the second hand coil 36. The second hand shaft 29 passes through the center hole 37a of the fixed coil 37 at intervals, and is rotatable relative to the fixed coil 37. The fixed coil 37 is supplied with power from a power supply means (not shown).

With such a configuration, the hour hand 131, minute hand 149, and second hand 15 are driven by the mechanical body 1 to display the time, and the fixed coil 37 is driven by the power supply means.
When power is supplied to the second hand coil 36, induced power is generated in the second hand coil 36 due to the action of electromagnetic induction.

Then, it is transmitted to the first contact piece 34 and the second contact piece 35 through the conductive plates 32 and 33 provided on the second hand shaft 29,
Furthermore, power is supplied to the EL element 16 via the connection plates 21,22.

In the second embodiment, the fixed positions of the second hand coil 36 and the fixed coil 37 are not limited to the second hand gear 29a and the middle plate 4.

Further, the load provided on the pointer is not limited to the EL element.

[Effects] As described above, according to the power supply device according to the present invention, power can be supplied without affecting the rotation torque of the second hand.

Further, since the rotary transformer is located below or inside the watch mechanical body and is not exposed to the outside, there is no risk of spoiling the aesthetic appearance of the watch, and there is no need to make the coil smaller, which prevents deterioration of transmission efficiency.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention, Fig. 2 is an enlarged view of the tip of the second hand shaft, Fig. 3 is an enlarged sectional view taken along line A-A in Fig. 2, and Fig. 4 is the rear end of the second hand shaft. 5 is a sectional view showing another embodiment, FIG. 6 is an enlarged view of the tip of the second hand shaft, and FIG. 7 is an enlarged sectional view taken along the line B--B in FIG. 6. DESCRIPTION OF SYMBOLS 1... Watch mechanical body, 8... Second hand shaft, 15... Second hand, 17... Insulating coating, 23... First contact piece, 27... Second hand coil, 29... Second hand shaft, 32.33 ...Conductive plate, 35..Second contact piece, 37..Fixed coil. 16...Load, 18...Conductive coating, 24...Second contact piece, 28...Fixed coil, 30.31...Groove portion, 34...First contact piece, 36...Second hand coil, etc. Up

Claims (2)

[Claims] (1) A conductive coating is formed on the outer periphery of the intermediate portion via an insulating coating, and a conductive second hand shaft whose rear end protrudes rearward from the watch mechanism body is fixed to the tip of the second hand shaft. a second hand that is fixed to the back surface of the second hand and comes into elastic contact with the tip of the second hand shaft; and a second contact piece that is fixed to the back surface of the second hand and comes into elastic contact with the conductive coating. a load provided on the second hand and connected to the first and second contact pieces, and a load fixed to the rear end of the second hand shaft and connected to the second hand shaft and the conductive a second hand coil having both ends fixed to the sexual coating; and a fixed coil fixed to the watch mechanical body, closely facing the second hand coil, and supplied with power from the outside. A power supply device for a pointer with a load, which is characterized by: (2) A second hand shaft made of an insulating material and provided with two grooves in the axial direction; two conductive plates respectively attached to the two grooves; and a second hand fixed to the tip of the second hand shaft. a first contact piece that is fixed to the back surface of the second hand and comes into elastic contact with one of the conductive plates; and a second contact piece that is fixed to the back surface of the second hand and comes into elastic contact with the other conductive plate. a load provided on the second hand and connected to the two conductive plates; and a second hand fixed to the rear of the second hand shaft and connected at both ends to the two conductive plates. a coil, which is fixed to the watch mechanical body and closely faces the second hand coil;
A power supply device for a loaded pointer, characterized by comprising a fixed coil to which power is supplied from the outside.