JPS6244381Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a pointer device for a clock mechanism that can be illuminated by transmitted light, which comprises at least two centrally located points of different lengths and one dial plate. Relating to a type of device that has the following.

For example, in the case of automobile instruments, based on the requirement that the displayed value can be read equally well within a relatively large solid angle, the analog display type of the instrument in question must not only be glare-free and halation-free, but also have a high contrast ratio. strong lighting is desired. In order to meet this requirement, by using light-conducting and light-diffusing means it is possible, for example, to illuminate a dial printed directly on a corresponding light-diffusing disk in a so-called transmitted light method. A particularly difficult construction problem remains in this case is that if the transmitted light for the dial and the vertical light for the hands (in this case the hands usually have a roof shape and the dial holder If there is no mixed illumination (which can be illuminated by overflowing light), for example in the illumination of the centrally arranged pointer or hands.

In order to solve this problem, German Utility Model No. 7901406 proposes that the meter pointer be
The location of the pointer may be formed by a slit in a non-light-transmitting disc that is moved in front of a light-diffusing disc driven by an instrument mechanism, or by using a disc made of a transparent material. It has been proposed to cover the disc with a cover cut out from the disc.

In the solution described in German Patent No. 1 145 808, the light of a shielded light source is applied via a light guide to the dial holder on the one hand and to the translucent hands on the other hand. The light is reflected via a correspondingly designed boss on the pointer for light reception.

In a pointer device for a clock mechanism with two centrally arranged hands, which is known from German Utility Model No. 1944977, the hour and minute hands are made of a translucent material; The light serving to illuminate the two hands is likewise received by the translucent point hub and is deflected by a corresponding reflective surface into the point body.

Furthermore, German Patent No. 2848001 describes a different constructional form of an illuminable pointer which is further improved with respect to uniform illumination; Even ignoring the cost, it is necessary to have a relatively bulky pointer boss and significant construction, which in turn requires a relatively large pointer end ring to cover the pointer boss.

It is easy to see that this last-mentioned solution is completely unsuitable for the formation of guidelines for horological devices, in which, as is well known, design considerations play a decisive role.

One design aspect, for example, is to avoid bulky guidelines. Naturally, in order to eliminate parallax, it is desirable to have a pointer with the smallest possible structural height and a thin pointer body with the smallest possible pointer boss. Furthermore, it is desirable for the pointer body to be formed as far as possible in the length relationships customary for timepieces, that is to say that pointer members or locally illuminated pointers are avoided.

Therefore, the problem of this invention is to improve the pointer device of the type mentioned at the beginning so that it is not only illuminated evenly and with strong contrast, but also satisfies the design conditions mentioned above and does not produce diffused light or halation. The object of the present invention is to provide a pointer device.

In order to solve this problem, the configuration of the present invention is as follows.
Two discs of different diameters made of translucent material are provided, the smaller diameter disc of both watches is assigned to the hour hand shaft, and the larger diameter disc is assigned to the minute hand shaft. , the hour hand is cut out from a non-transparent mask provided on a small-diameter disc and shields the disc from light; the minute hand, which is longer than the hour hand, is made of a translucent material; It is combined with a large diameter disc so as to cover the small diameter disc in the direction.

The arrangement according to the invention, which is well adapted to the design requirements, is designed in such a way that the optical distance between the light guide and the pointer mechanism is as short as possible and the light is deflected very little, and in addition, compared to This is particularly advantageous in terms of lighting technology, since a large receiving surface is provided.

Furthermore, it is advantageous if, for example, the light for illuminating the minute hand is introduced close to the pointer tip. This provides a simpler means of evenly illuminating the minute hand than if the light were to be deflected onto the pointer body via a bulky pointer boss requiring a correspondingly large pointer end ring. be able to.

Next, embodiments of the present invention will be described with reference to the drawings.

As can be seen from FIG. 1, two coaxially supported hollow shafts 1 and 2 have disks 3 of different diameters,
4 are fixed respectively. In this case, the disk 4 surrounds the other smaller diameter disk 3 with a ring-shaped additional portion 5 formed on the disk 4, and the smaller diameter disk 3
, the side facing the observer 6 and the large diameter disk 4
The ring-shaped surfaces 7 of are located on the same plane. Also located in this plane is the upper side 8 of the sheet 9, which is made of a translucent, in particular light-diffusing material and serves as a dial holder. The indicator lines 10 of the dial 11 are formed by corresponding cutouts from a non-transparent, for example black, sheet 9 which serves as a cover. In this case, the color tone of the display bar 10 is further improved by the interposition of a colored layer and the contrast by a white layer. sheet 9
A plate-shaped light guide 12 is assigned as a base body. For optimum light transmission in the light guide 12, the light guide 12 is as shown in FIG.
to further guide the light introduced by the light source or sources (bulb 13) surrounded by the light source and to diffuse this light as much as possible in the area of the dial and hands (in this case the light conductor 12
The surface facing the sheet 9 has been roughened by sandblasting).The light guide 12 has an opening 14 approximately corresponding to the diameter of the large-diameter disk 4. has been done.

The structure and arrangement of both discs 3 and 4 are similar to that of the light guide 1.
The outer peripheral surface 15 of the large-diameter disk 4 is selected according to the opening 14 of the disk 2, and the light that passes through both the disks 3 and 4 is selected according to the aperture 14 of the disk 4.
It is now being accepted in the In this case it is possible to further improve the light distribution by forming the discs 3, 4 with conical and/or curved surfaces; however, this does not mean that the bulb 13 and the disc 3, Due to the selected light guide which is hardly deflected between the two directions, this is not necessary.

The smaller hand of a clock mechanism is usually the hour hand.
This hour hand, designated 16, can therefore be constructed, for example, by covering the front face 6 of the small-diameter disc 3 with a correspondingly cut-out non-transparent colored layer. It is formed. On the other hand, minute hand 1
7 is three-dimensional and made of a translucent material. A slit (not shown) is provided in the large-diameter disk 4, and the minute hand 17 is inserted into the slit.
Engaged is a prismatic foot 18 integrally molded into the body, which foot 18 serves to receive light. A pin 19 integrally molded into the foot 18 serves to secure the minute hand 17 to the disc 4. Large diameter disc 4
Like the surface 6, the outwardly facing ring-shaped surface 7 is covered to prevent light from passing through. As shown in FIG. 1, the minute hand 17, which is located outside the small-diameter disc 3 and whose pointer tip 21 covers the dial 11, has an inner end that covers the end surface of the hollow shaft 1. It is shaped to form a central portion 20. The shade of the pointer rotation center 20 preferably corresponds to the shade of the surfaces 6, 7. In order to improve the reflection characteristics inside the minute hand 17, the minute hand 1
The lower surfaces 22 and 23 of 7 may be painted in a bright color. In order to improve the tint of the hour hand 16 and the minute hand 17, it is also possible to use a corresponding light filter, which is inserted, for example, between the light guide 12 and the disc 4.

For completeness, in front of the disc 4 holding the minute hand 17 (as seen from the observer)
The solution described above with the hour hand disc 3 arranged at This is only possible if the two hollow shafts 1, 2 are arranged oppositely to each other.

In the embodiment shown in FIG. 2, the disks 3, 4 are each molded as a flange directly on the hollow shaft 1, 2 or on the corresponding shaft remainder. Compared to the embodiment of FIG. 1, the embodiment of FIG.
is designed thin and is arranged in a recess 24 provided in the light guide 12. As a result, the three surfaces 6, 7, 8 are located in the same plane as in the embodiment of FIG. In the embodiment shown in FIG. 2, light reception and transmission of light by the two discs 3, 4 and the minute hand 17 takes place mainly at the flange surface 25 of the disc 4. By the edge 26 formed on the disc 4 and located below the dial holder (seat 9),
Light is prevented from leaking through the gap 27 between the ring-shaped additional portion 5 of the disc 4 and the dial holder.
In the embodiment of FIG. 1, it is not possible to avoid a corresponding halo of light. This embodiment, which provides better illumination of the pointer due to the larger light-receiving surface compared to the embodiment of FIG. 1, however also requires higher production costs and a more complex assembly process.
A second hand 30, which does not necessarily need to be illuminated or illuminated, is fixed to the shaft 28.
This second hand 30 has a pointer rotation center 3 in a general-purpose format.
0 is integrally molded. The pointer end located inside the minute hand 17 is located below the pointer rotation center 30, so the pointer end of the minute hand 17 is covered by the pointer rotation center 30, and the minute hand 17 is connected to the clock mechanism. It appears to extend from the center.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first embodiment of a pointer device according to the present invention, FIG. 2 is a sectional view showing a second embodiment,
FIG. 3 is a top plan view of the pointer device shown in FIG. 2; 1, 2...Hollow shaft, 3, 4...Disc, 5...Additional part, 6, 7, 8...Face, 9...Seat, 10...
...Display bar, 11...Dial board, 12...Light guide,
13...Light bulb, 14...Aperture, 15...Outer peripheral surface,
16... Hour hand, 17... Minute hand, 18... Foot, 1
9... Pin, 20, 30... Pointer rotation center, 2
1... pointer tip, 22, 23... bottom surface, 24...
... recessed part, 25 ... flange surface, 26 ... edge,
27...Gap, 28...Shaft, 29...Second hand.

Claims (1)

[Claims for Utility Model Registration] 1. A pointer device for a timepiece mechanism that can be illuminated by transmitted light, which has at least two centrally located points of different lengths and a dial. In this type of clockwork, two discs 3 and 4 of different diameters made of transparent material are provided, and the smaller diameter disc 3 of both discs is attached to the hour hand shaft 1 of the clockwork. , a large-diameter disk 4 is attached to the minute hand shaft 2, and an hour hand 16 is cut out from a non-transparent mask that is provided on a small-diameter disk 3 and blocks light from the same disk. It is characterized in that the minute hand 17, which is relatively long, is made of a translucent material, and is connected to the large-diameter disk 4 so as to cover the small-diameter disk 3 in the radial direction. A pointer device for a clock mechanism that can be illuminated by transmitted light. 2 Front side 6 of the small diameter disc 3 facing the observer
and the ring-shaped front surface 7 of the large-diameter disc 4 and the dial 1
1. The pointer device according to claim 1, wherein the pointer device and the pointer device are located on the same plane. 3. Utility model registration claim 1, in which the minute hand 17 is engaged with a slit provided in the large-diameter disc 4 via a prismatic leg portion 18 formed on the minute hand.
Pointer device as described in section. 4. The pointer according to claim 1 of the utility model registration claim, in which the inner end of the minute hand 17 is covered so as not to be visible from the outside by the pointer rotation center portion 30 that belongs to the second hand 29 and covers the hour hand shaft through hole. Device. 5. The pointer device according to claim 1, wherein the pointer rotation center portion 20 is integrally molded with the minute hand 17 and is coated to prevent light from passing through. 6. The two disks 3, 4 are arranged plane-parallel to the opening 14 in the plate-shaped light guide 12, the two disks 3, 4 being located approximately between the limiting surfaces of the light guide 12. Scope of claim for utility model registration No. 1
Pointer device as described in section. 7. The pointer device according to claim 1, wherein a ring-shaped optical filter is inserted between both discs 3, 4 and the light guide 12.