JPH0333681A - Lighting device for hands - Google Patents

Abstract

PURPOSE:To prevent an effect on a rotational torque by making a hand of a material having a light-transmitting property and by providing a light- introducing part in the vicinity of the center of rotation. CONSTITUTION:Being driven by a clock machine body 1, an hour hand 10, a minute hand 20 and a second hand 30 rotate to indicate the time. When a power is supplied from a driving circuit, at the same time, it is supplied from lead wires 9a and 9b to ring-shaped fixed conductors 7 and 8 and further to contact pieces 12 and 13 by contacts 12a and 13a sliding on these conductors 7 and 8, and then it is supplied to an EL element 19 for the hour hand. Next, the power is supplied likewise from the contact pieces 12 and 13 to an EL element 29 for the minute hand through ring-shaped conductors 17 and 18 and contact pieces 22 and 23. On the occasion, the power is supplied also to an EL element 39 for lighting the second hand from the contact pieces 22 and 23. A light emitted from the element 39 with the power supplied is almost reflected by a reflecting surface 30b of a recessed part 30c and advance inside the second hand 30 having a light-transmitting property, while it is reflected by a light-reflecting film 34 and emitted outside on the lower side.

Description

[Detailed description of the invention] [Field of industrial use] The present invention relates to a light emitting device for a pointer.

[Prior Art and Problems to be Solved] The applicant Mizu has proposed a power supply device for a pointer with a load in Japanese Patent Application No. 63-233974. Its 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 bottom surface 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 this type of contact brush method, when the contact slides on the ring-shaped conductor, the rotation of the pointer creates a frictional load, and to reduce this, the contact pressure of the contact with the conductor is lowered.
There was a risk that the reliability of continuity would be impaired.

Therefore, as a solution to the drawbacks of the contact brush method,
Japanese Patent Application No. 63-331196 proposes a power supply device for a loaded pointer. This is because a first coil provided on the lower surface of the pointer and a 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 power is generated in the first coil and power is supplied from the first coil to a load provided on the pointer.

However, this rotary transformer system has the drawbacks of a complicated configuration and high cost.

[Object of the Invention] Therefore, an object of the present invention is to provide a pointer light emitting device that does not affect the rotational torque of the pointer, has a simple configuration, and can be manufactured at low cost.

[Means for achieving the object] The first pointer of the pointer light emitting device according to the present invention is made of a translucent material, and has a lead-in part on its lower surface near its center of rotation. It is.

The pointer light emitting device according to the present invention includes the first pointer and the first pointer.
A second pointer disposed below the pointer, and a light emitting element provided at the center of the upper surface of the second pointer and facing the lead-in part of the first pointer. It is.

Further, it is effective to provide a concave portion in the first introduction portion that has a funnel surface that reflects the light emitted from the light emitting element toward the first pointer.

[Operation] According to the present invention, the light emitted from the light emitting element enters the first pointer from the introduction part, travels inside the first pointer made of a translucent material, and is emitted to the outside.

Therefore, the first pointer of the user's hook appears to be emitting light.

Furthermore, if a concave portion having a reflective surface is provided in the pre-introducing portion, the light emitted from the light emitting element located within this concave portion is reflected on the reflective surface, travels to the first pointer, and is directed from the light emitting portion to the outside. radiated.

[Example code] An embodiment of the present invention will be described with reference to the drawings.

This embodiment is an example applied to a watch, in which power is supplied to the hour hand and minute hand using a contact brush method similar to the conventional one to cause the light emitting elements provided in the hour hand and minute hand to emit light, and the second hand is a pointer according to the present invention. It emits light using a light emitting device.

An hour hand shaft 3, a minute hand shaft 4, and a second hand shaft 5 pass through a bearing 2 fixed to a timepiece mechanical body 1. At the second end of bearing 2,
A fixed contact base 6 is press-fitted. This fixed contact block 6'
On the second side, there is a ring-shaped protrusion 6 concentric with the center of rotation of the pointer.
A is provided, and two ring-shaped fixed conductors 7.times.8 are arranged on the outside and inside of this protrusion 6a. L-shaped connection pieces 7a, 8a are layered on a part of each ring-shaped fixed conductor 7, 8, and these connection pieces 7a, 8a protrude from the lower surface of the fixed contact base 6, and the lead wires 9a, It is firmly connected to 9b with solder 14, and is led to a drive circuit (not shown).

Above the fixed contact base 6, there is an hour hand 1 fixed to the hour hand shaft 3.
0 is placed. A pair of contact pieces 12 and 13 are fixed to the lower surface of the hour hand 10 with an insulating plate 11 interposed therebetween.

The contact pieces 12 and 13 are hour hand electroluminescent elements (hereinafter referred to as EL elements) provided on the Il and +j hands 10.

) 19, and has contacts 12a and 13a, respectively. The contacts 12a and 13a are formed to slide on ring-shaped fixed conductors 7 and 8, respectively, with a concentric circle with respect to the center of rotation of the hour hand 10 as a locus of movement.

A contact base 16 having the same structure as the fixed contact base 6 is fixed to the upper surface of the hour hand 10. The upper surface of the contact base 16 has a protrusion 1
Ring-shaped conductors 17, 18 are provided on the outside and inside of 6a. Connection piece 17a.

18a penetrates through the contact base 16, protrudes from the lower surface of the hour hand 10, and is fixed and connected to the contact pieces 12 and 13 with solder 14, respectively.

Further, above the hour hand 10, a minute hand 20 fixed to the minute hand shaft 4 is disposed. A pair of contact pieces 22 and 23 having the same structure as the contact pieces 12 and 13 are fixed to the lower surface of the minute hand 20 via a barrel plate 21. The contact pieces 22 and 23 supply power to a minute hand EL element 29 provided on the minute hand 20 and a second hand light emitting EL element 39 provided at the center of the upper surface of the minute hand 20. The contacts 22a and 23a of the contact pieces 22 and 23 are connected to the ring-shaped conductor 17°18 of the hour hand 10.
It is possible to slide on the top.

A second hand 30 fixed to the second hand shaft 5 is disposed above the minute hand 20. The second hand 30 is made of a light-transmitting material, and a light-shielding film 31 made of a light-shielding paint or the like is provided in the center. On the underside of the second hand 30,
A pre-introduction part 30a is provided near the center of rotation. The leading introduction part 30a is provided with a recess 30c having a reflective surface 30b.
It is formed so as to almost cover the element 39.

Further, on the lower surface of the second hand 30, a light reflecting film 34 made of aluminum or the like is formed by vapor deposition or the like in order to cause the second hand 30 to emit light efficiently using the light taken in from the front introduction part 30a.

The hour hand 101, the minute hand 203, and the second hand 30 are connected to the cuff 10, respectively.
It is fixed to the hour hand shaft 32, the minute hand shaft 41, and the second hand shaft 5 via pipes 30d, 20a, and 30d, and is rotatable in the - direction of the dial 33 fixed to the dial holder 32.

With such a configuration, the hour hand 102, minute hand 202, and second hand 30 are rotated by the timepiece maple body 1 to display ■9 tick, and when power is supplied from the drive circuit, the lead wires 9a, 9b to the ring-shaped fixed conductor 7.8 and the contact 12 sliding on this ring-shaped fixed conductor 7.8.
a, 13a to the contact pieces 12, 13, and E for the hour hand.
Power is supplied to the L element 19.

Next, in the same manner, the ring-shaped conductor 1 is connected to the contact pieces 12 and 13.
7, 18, the minute hand EL element 2 via the contact pieces 22, 23
Power is supplied to 9.

At this time, power is also supplied from the contact pieces 22 and 23 to the second hand light emitting EL element 39. Most of the light emitted when power is supplied to the second hand light emitting EL element is reflected by the reflective surface 30b of the concave portion 30c as shown by the arrow 35, travels inside the second hand 30 having translucent properties, and then passes through the lower surface of the second hand 30. Then, the light is reflected by the light reflecting film 34 and radiated to the outside.

In this embodiment, the reflective surface 30b is made concave and the concave portion 30c is formed so that most of the light is reflected toward the pointer 30, but the reflective surface 30b and the concave portion 30c are not limited to this shape. do not have. Further, the continuous light converter 31 and the light reflecting film 34 may be provided as appropriate in a portion of the second hand 30 that does not emit light. The second hand 30 may be constructed from a plurality of members instead of integrally forming the leading introduction portion 30a and the pipe 30d as shown in this embodiment. The light emitting element 39 is E
It is not limited to L chords.

In this embodiment, power is supplied to the hour hand 10 and minute hand 20 by a conventional contact brush type power supply device to cause the light emitting elements to emit light, and only the second hand 30 is made to emit light by the pointer light emitting device according to the present invention. However, it is also possible to apply the pointer light emitting device according to the present invention to the hour hand 10 or the minute hand 20.

[Effects] As described above, the pointer light emitting device according to the present invention does not affect the rotational torque of the pointer, so it can also be used for a pointer driven with low torque, such as the second hand of a watch. Moreover, the structure is simple and can be manufactured at low cost.

[Brief explanation of drawings]

The drawing is a sectional view showing an embodiment of the present invention. 20...Second hand (minute hand), 30...first hand (second hand), 30a...Preliminary introduction, 30b...reflective surface, 30c... recess, 39... Light emitting element (electroluminescent device). that's all

Claims (3)

[Claims] (1) A first pointer made of a translucent material and having a lead-in part on its lower surface near its center of rotation, and a second pointer disposed below the first pointer. A pointer light emitting device comprising: a pointer; and a light emitting element provided at the center of the upper surface of the second pointer and facing the first introduction part. (2) The pointer light-emitting device according to claim 1, wherein the first introduction portion includes a recessed portion having a reflective surface that reflects light emitted from the light-emitting element toward the first pointer. . (3) The pointer light emitting device according to claim 1 or 2, wherein the first pointer is a second hand of a timepiece, and the second pointer is a minute hand.