EP2341403A1 - Watch - Google Patents

Abstract

The clock has a view aperture in a clock cabinet (2) that is directed towards observer. The clock components with light-receiving regions are provided in the clock cabinet. The light receiving surface area in the clock cabinet is covered by a transparent cover portion to transmit UV light and to block visible light. The light-receiving regions are made of phosphor. The transparent carrier of dial (6) is made of sapphire glass. The observer side surface area of the dial is coated with titanium oxide or silver.

Description

The invention relates to a watch, in particular a wristwatch, with a watch case, which has a viewing aperture directed to an observer, with a movement and with one or more components with light-receiving areas on its surface, wherein the movement and the components with light-receiving areas Surface are arranged in the watch case and covered by a translucent cover to the observer side.

In such a solar battery powered watch, it is known to form the cover member from a ceramic which transmits light incident thereto, so that a solar battery disposed behind the cover member can be charged without any problem. The cover is also permeable to the visible to the human light.

As a result, the light which has passed through the cover part on its side facing away from an observer can be reflected on components located behind the cover plate and the cover part illuminates again through the cover part to the observer side.

The object of the invention is therefore to provide a clock of the type mentioned, in which the components with light-receiving areas from the outside through the cover at least largely avoiding visible to a human lightening of the cover light is well supplied.

This object is achieved in that the cover for ultraviolet light permeable and visible to light spectrum is at least largely impermeable.

As a result of this design, ultraviolet light reaches the light-receiving regions behind the cover part without substantial attenuation and thus with high intensity of its light radiation through the cover part.

Since the light having a human-visible spectrum is already prevented from passing through the cover member into the inside of the watch case, the cover member can not be brightened by light reflected in the inside of the watch case with human-visible spectrum.

The areas of light-receiving surface can be designed differently depending on the purpose.

So it is possible that the surfaces are parts of solar batteries.

If the regions of the light-receiving surface consist of a long-lasting phosphor, in particular of phosphorescent pigments, the phosphor is activated by the ultraviolet light components of the daylight or artificial light passing through the cover from the outside and leads to afterglow with high luminance.

This afterglow can then be used in the dark and no longer existing Lichtbeaufschlagung from the outside for certain lighting purposes.

Simple and inexpensive to produce, it is when the cover consists of a plate-like support member of a translucent material on which one or more coatings are applied, which are transparent to ultraviolet light and visible to light spectrum at least largely impermeable.

In this case, the coatings applied to the carrier part, preferably on the observer side, can be applied to the carrier part in many different ways be applied from translucent material. Advantageous possibilities for this are, for example, vapor deposition, sputtering or printing.

The carrier part can consist of any suitable material.

The carrier part of the cover part preferably consists of glass, in particular of sapphire glass.

If at least one of the coatings consists of silver or contains a silver content, the result is a high-contrast cover part of dark color.

If at least one of the coatings consists of titanium oxide or contains a proportion of titanium oxide, the cover part not only has a high-contrast dark coloration, but additionally has an anti-reflective effect.

In order to achieve sufficient opacity for light of the human visible spectrum, the titanium oxide coating has a thickness of between 65 nm and 100 nm.

The coating of titanium oxide preferably has a thickness of between 75 nm and 90 nm, in particular of 80 nm.

The cover member may be transmissive for each wavelength region of the ultraviolet light spectrum.

It is advantageous if the Absoptionskurve the phosphorescent pigments have an absorption peak, which is in, in particular approximately in the middle of the wavelength range for which the cover part for the light ultraviolet spectrum is permeable.

Preferably, the ultraviolet light cover member having a wavelength between 250 nm and 430 nm is translucent. This is particularly advantageous if the absorption curve of the phosphorescent pigments have an absorption peak at a wavelength in the vicinity of 370 nm.

In addition, this wavelength range is sufficiently spaced from the human visible spectrum of light to avoid passage of that light.

If the cover part has one or more continuous windows, and the components with the light-receiving areas of the movement are driveably drivable carrier elements and the light-receiving areas display elements in one by the drive of the movement In this way, the display elements are exposed to ultraviolet light not only during their positioning in the region of the windows but also when they are covered by the covering part, so that they can reach the area of the windows and be visible to the observer Daylight or artificial light is always a sufficiently strong excitation of the long-lasting phosphor, which consists in particular of inorganic phosphorescent pigments occurs.

In the dark, it comes to a long afterglow of the display elements with high luminous intensity.

The cover can form a dial of the clock.

The display elements may be number and / or number and / or letter and / or symbol discs and / or rings, through which a digital display of the time and / or the date and / or the day of the week and / or the month can be made ,

Figur 1

eine Draufsicht auf eine Uhr

Figur 2

eine Draufsicht auf die Uhr nach Figur 1 mit entferntem Zifferblatt

Figur 3

einen Schnitt entlang der Linie I - I in Figur 1 des Bereichs von Anzeigescheiben und Zeitbrücke der Uhr nach Figur 1.

An embodiment of the invention is illustrated in the drawing and will be described in more detail below. Show it

FIG. 1

a top view of a clock

FIG. 2

a top view of the clock behind FIG. 1 with removed dial

FIG. 3

a section along the line I - I in FIG. 1 the range of display slices and time bridge of the clock FIG. 1 ,

The watch is a wristwatch with several dials 1, 3, 5 for the digital display of the time.

In this case, a ten-digit dial 1 is arranged in parallel in front of a single-digit dial 3 in a pot-like watch case 2.

The coaxially arranged ten-digit dial 1 and one-dial disc 3 are disposed within the outer contour 4 of a ring-shaped hour dial 5, which are in a plane parallel to the ten-digit dial 1 and the Einzelziffernscheibe 3 level.

Evenly distributed on the circumference are the ten-digit 10, 0 to 5, on the single-digit dial 3 the single digits 11, 0 to 9 and on the hour dial 5 the hour digits 12, 1 to 12 are arranged on the ten-digit dial 1.

These numbers 10, 11, 12 form light-receiving and light-emitting areas of a long, luminescent phosphor. This phosphor preferably consists of phosphorescent inorganic pigments.

The dial 6 itself consists of a transparent support member made of sapphire crystal, the observer-side surface is provided by vapor deposition with a coating of titanium oxide in a thickness of 80 nm.

As a result, the dial 6 is transparent to ultraviolet light of a wavelength between 250 nm and 430 nm, but impermeable to light of the human-visible spectrum.

Thus, the dial 6 is opaque to a human. Thus, an observer from the observer side can not see the behind the dial 6 components of the clock, especially the dials 1, 3 and 5.

Diametrically opposite each other, two windows 8 and 9 are formed in the time bridge 7.

Through the first window 8, the respective lower hour 12 of the hour dial 5 and through the second window 9, the respective underlying ten digits 10 and one digits 11 of the ten-digit dial 1 and the Einzelziffernscheibe 3 can be seen.

These digits indicate the display of the time. In the present case, the time is 3:21 minutes.

Since the dial 6 is transparent to ultraviolet light, the tens 10, 11 and 12 are not only exposed to ultraviolet light when they are in the area of one of the windows 8 or 9, but also when they are in one are covered by the dial 6 area.

Thus, even in these covered by the dial 6 positions a charge of the long-lasting phosphor whose absorption curve preferably has an absorption peak at a wavelength in the vicinity of 370 nm, so that it is very luminescent in the dark for a long time.

In the time bridge 7, a circular recess is further formed, in which a dial 13 of a circular seconds display is inserted, which is swept by a rotatably driven second hand 14.

Above the time bridge 7, an axis of a rotatably drivable power reserve indicator 15 of a power reserve indicator projects through an opening of the dial 7.

LIST OF REFERENCE NUMBERS

1

Ten digits disk

2

watchcase

3

A number plate

4

contour

5

Hours number plate

6

dial

7

time bridge

8th

first window

9

second window

10

Ten digits

11

a digit

12

hour numerals

13

dial

14

second hand

15

Power reserve indicator

Claims (10)

Clock, in particular wristwatch, comprising a watch case having an observer facing viewing aperture, with a movement and with one or more components having light-receiving areas on its surface, wherein the movement and the components arranged with areas of light-receiving surface in the watch case and of a translucent cover to the observer side are covered, characterized in that the cover for ultraviolet light permeable and visible to light spectrum is at least substantially impermeable. Clock according to claim 1, characterized in that areas of light-receiving surface consist of a long-lasting phosphor. Watch according to one of the preceding claims, characterized in that the cover part consists of a plate-like support part made of a transparent material on which one or more coatings are applied which are suitable for ultraviolet Light transmissive and light-visible spectrum are at least largely impermeable. Clock according to claim 3, characterized in that the carrier part of the cover part consists of glass. Clock according to one of claims 3 and 4, characterized in that at least one of the coatings consists of silver or contains a silver content. Watch according to one of Claims 3 to 5, characterized in that at least one of the coatings consists of titanium oxide or contains a proportion of titanium oxide. Clock according to claim 6, characterized in that the coating of titanium oxide has a thickness between 65 nm and 100 nm. Watch according to any one of the preceding claims, characterized in that the ultraviolet light covering member having a wavelength of between 250 nm and 430 nm is translucent. Clock according to one of Claims 2 to 8, characterized in that the cover part has one or more continuous windows (8, 9) and the components with the light-receiving areas of the movement are driveably drivable support elements and the light-receiving areas are display elements in a through the drive of the movement certain rhythm in the area of the windows (8, 9) reach and are visible through this for the observer. Clock according to Claim 9, characterized in that the display elements are number and / or number and / or letter and / or symbol discs (10, 11, 12) and / or rings.

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