JPS6027389B2 - Clock display lighting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display illumination device for a watch, and the object thereof is to use the hour and minute hands as a light source to facilitate time reading in an office. To provide an illumination device for a display part of a timepiece, which can supply power to an illumination lamp embedded therein without increasing the thickness of the hour and minute hand shafts in all directions.

Those with illumination lamps attached to indicator hands such as the hour and minute hands are published in Tokukan Raku 49-1-Ro 752 Publication and Tsubaki Kanryaku 52-8086.
This is shown in Publication No. 3, etc.

However, in the method shown in these, a pair of conductive plates are provided on the indicator wheel provided on the indicator shaft to which the indicator needle is attached, and a contact spring is connected to both conductive plates connected to the illumination lamp. This is to supply electric wires to the lighting lamps.If lighting lamps are installed on both indicator hands and power is supplied to each lighting lamp, the indicator needle shaft to which each indicator needle is attached At the same time, it is necessary to provide two sets of hair point springs at the same time as providing conductive plates on the two indicator wheels provided respectively in the two indicator wheels.
Since a set of bush point springs is required, the thickness in the direction of the ball inevitably increases. The present invention has been provided in view of the above points, and includes two coaxially arranged
Of the two indicator shafts, the anode side acid point plate and the cathode side contact plate arranged on the outer periphery of the outer indicator needle shaft are each provided with contact spring pieces that protrude inside, and the outer periphery of the inner indicator needle shaft is An anode ring, a cathode ring, and an anode-side contact plate and a cathode-side dovetail plate are provided on the surface, and the contact plate on the anode side and the dovetail plate on the cathode side are respectively connected to both rings. A pair of conductive plates connected to the point plate and connected to a pair of contact springs and supplied with power are installed on the indicator wheel provided on the shaft, and a pair of conductive plates are provided in the indicator needle attached to the spinal cord of each indicator needle. It is characterized in that the lead part of the buried illumination lamp is fixed in contact with the anode side contact plate and the cathode side contact plate of each indicator needle shaft, and is provided on each of the two indicator needles. Even though power is supplied to both illumination lamps, it is equipped with a turtle path from one indicator shaft to the other, so it seems that only one set of contact springs is required. This is what I did. A detailed explanation will be given below based on the illustrated embodiment. Conductive plates 3 and 4 are fixed to the front and back surfaces of an hour hand wheel 2 made of insulating synthetic resin, which is integrally formed with an hour hand wheel 1 at the lower end of a pipe-shaped hour hand shaft 1. Reference numerals 7 and 8 denote springs 5 that connect the conductive plates 3 and 4 to the power source V by connecting them to the conductive plates 3 and 4, respectively.
, 6, and in the illustrated example, the rear point spring 6 is on the anode side and the contact spring 5 is on the cathode side. An anode-side contact plate 9 and a cathode-side contact plate 10 are coated and fixed on the outer circumferential surface of the hour hand shaft 1 so as to surround half the circumference, respectively, and the cathode-side contact plate 10 is joined to the cathode-side contact plate 4, and the anode Side contact plate 9
passes through the notch 11 penetrating the hour hand wheel 2 to the anode side conductive plate 3.
and are joined together. Hour hand 1 press-fitted into hour hand shaft 1
2 is made of transparent synthetic resin, and a lighting lamp 13 like a light emitting diode or miniature light bulb is embedded therein, and the hour hand 1
Both lead parts 14, 1 of the illumination lamp 13 are attached to the inner circumferential surface of the hole of 2.
5 are exposed facing each other, and when the tip of the hour hand shaft 1 is press-fitted into the shaft hole, both lead parts 14 and 15 are fixed in contact with the anode side contact plate 9 and the cathode side contact plate 11, respectively. be.
The pipe-shaped minute hand shaft 16 is made of insulating synthetic resin and the minute hand wheel 17 is made of insulating synthetic resin.
It is formed integrally with the hour hand shaft 1 and is located coaxially within the hour hand shaft 1.
An anode ring 18 and a cathode ring 19 are fixed to the lower outer peripheral surface of the minute hand shaft 16, and these are anode contacts that penetrate windows 20 and 21 provided in the hour hand shaft 1 and protrude to the inner peripheral surface thereof. The contact spring piece 22 of the plate 9 and the contact spring piece 23 of the cathode side contact plate 10 are in contact with each other. Similar to the hour hand shaft 1, an anode-side contact plate 24 and a cathode-side dot plate 25 are fixed to the upper outer peripheral surface of the minute hand shaft 16 approximately halfway around each other, and the cathode ring 1
9 is connected to the cathode side contact plate 25, and the anode side contact plate 2
4 is connected to the anode ring 18 by a lead plate 26. The lead plate 26 has an insulating coating such as enamel and is disposed in a groove 27 cut on the outer circumferential surface of the minute hand shaft 16 to pass inside the cathode ring 19, and is brought into contact with the cathode ring 19 through the insulating coating. It is designed to prevent short-circuiting even if the The minute hand 28 attached to the minute hand shaft 16 is the hour hand 1.
Like 2, an illumination lamp 29 made of transparent synthetic resin is embedded, its lead parts 30 and 31 are exposed facing the inner peripheral surface of the borehole, and contact plates 24 and 25 for anode and cathode are connected to the lead part. Power is applied to the illumination lamp 29 through 30 and 31. The second hand axis, which has approximately the same configuration as the minute hand axis, is the minute hand axis 1.
6 and supply power from the minute hand shaft 16, all three hands can be illuminated as indicator hands. Between, contact spring 5
, 6 may be the minute hand wheel 17 instead of the hour hand wheel 2 mentioned in the embodiment. In this case, power is supplied from the minute hand shaft 16 to the hour hand shaft among the indicator hand shafts of the hour hand shaft 1 and the minute hand shaft 16. In the figure, 33 is a support shaft, 34 is a glass,
35 is a glass presser odor, and 36 is a housing. As described above, in the present invention, when power is supplied to the illumination lamps provided on the two indicator hands, the hour hand and the minute hand, through each indicator hand shaft, the indicator provided in one indicator hand track is By simply bringing the pointer into contact with a pair of conductive plates arranged on the needle wheel, power is supplied to the contact plate of the other indicator needle shaft via the contact spring piece ring. , it is not necessary to provide a conductive plate on the indicator wheel provided on each indicator needle shaft and to provide two sets of contact springs, and therefore the thickness in all directions of the shaft can be reduced. .

[Brief explanation of the drawing]

FIG. 1 is a cutaway perspective view of one embodiment of the present invention, FIG. 2 is a sectional view of the same as above, FIG. 3 is a perspective view of the hour hand shaft, and FIG. 4 is a perspective view of the minute hand shaft, where 1 is the hour hand shaft. , 2 is an hour hand wheel, 3 and 4 are conductive plates, 5 and 6 are bush point springs, 9 and 24 are anode side contact plates, 10
, 25 is a cathode side contact plate, 12 is an hour hand, 13 and 29 are illumination lamps, 16 is a minute hand shaft, 18 is an anode ring, 19 is a cathode ring, and 22 and 23 are contact spring pieces. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1 Of the two indicator shafts arranged coaxially, the anode side contact plate and the cathode side contact plate arranged on the outer periphery of the indicator needle shaft on the outer peripheral side are each provided with a contact spring piece protruding inside, and the inner peripheral side An anode ring and a cathode ring, and an anode side contact plate and a cathode side contact plate respectively connected to both rings are provided on the outer peripheral surface of the indicator needle shaft, and the contact spring pieces are brought into contact with both the rings, respectively; An indicator wheel provided on one indicator needle shaft is provided with a pair of conductive plates connected to a contact plate and supplied with power by sliding contact with a pair of contact springs, respectively, and an indicator needle attached to each indicator needle shaft. A display illumination device for a watch, in which a lead part of an illumination lamp embedded within the watch is fixed in contact with an anode-side contact plate and a cathode-side contact plate of each indicator shaft.