JPS636647Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention has a casing and a lid which is rotatably disposed in the casing and allows access to each recording member, and through a window provided on the front side of the lid at least speed A measuring display mechanism is readable and a distance meter is arranged independently of the lid and includes a cover removably coupled to the casing, the front surface of the cover being in contact with the front surface of the lid. Located almost on the same plane, it forms the front surface of the tachograph together with the front surface of the lid, and has an opening for passing through an adjustment mechanism that allows the driver to manually select recording modes corresponding to various tasks. The present invention relates to a tachograph of the type provided on the cover.

The above-mentioned type of tachograph structure, in connection with the manufacture of the instrument panel, minimizes assembly costs, makes the mounting opening geometrically simple, adjusts the height of the tachograph relative to the instrument panel, and allows the tachograph to be mounted on the instrument panel. This is necessary when attempting to meet the increasing demand for configurations that can be mounted flush or flush with the front surface of an adjacent instrument.

Therefore, in such a configuration where the cross-sectional area of the lid is smaller than the cross-sectional area of the casing of the tachograph, the front surface of the tachograph is divided by the pivoting gap necessary for pivoting the lid, and this pivoting gap impairs the aesthetic appearance. Even if one ignores the fact that the lid is smaller, the display angle will be reduced when speed measurements are displayed using a pointer or the like.

On the other hand, if the tachograph is placed in a way that is easy for the driver to see, i.e. within the range of the steering wheel, the turning radius of the lid is reduced, and the distance meter of the tachograph is placed independently of the lid.
The structure of the drive device of the distance meter is simplified, and the working time adjustment mechanism is housed within the cross-sectional area of the casing, as has already been realized in known tachographs, and, like the distance meter, it is independent of the lid and does not impair aesthetics. It is advantageous to be arranged like this.

Therefore, although it is desirable to make the display angle as large as possible, it is clear that the size of the display angle is limited by the space required for the distance meter. In any case, it is desirable to configure the width of the casing addition part or the cover forming the casing addition part to be as small as possible. This means that, especially if the casing is cylindrical, there is less room for choice in the position of the adjustment knob of the adjustment mechanism in addition to the relatively narrow arcuate cover fixed to the casing. . Of course, this also applies to the fixing mechanism of the cover to the casing. Therefore, the cover can be attached from the front side using a technically simpler method than the previously mentioned known tachograph, and since the cover forms a part of the casing, unauthorized operation can be prevented. Sufficiently secure fixing to the casing is important not only for reasons of space and aesthetics, but even if the front screw connection has been made unobtrusive in a suitable manner, it is necessary to remove the screw connection at a distance. To date, this has not been implemented because it would create a temptation for drivers to move the meter.

The object of the present invention is therefore to ensure that the distance meter is arranged in such a way that it can be adjusted later without special labor costs, and even eventually be replaced, so that manipulation is prevented and aesthetics are maintained. The coupling mechanism for fixing the cover to the casing in an undamaged manner is to be easily operated and to be constructed from simple components.

The problem with the present invention is that in the tachograph of the type mentioned at the beginning, the cover is connected to the casing by a screw connection mechanism that can be operated from the front side.
A hollow screw is used as this screw connection mechanism, and an adjustment shaft that transmits the adjustment movement of the adjustment mechanism is passed through the hollow screw, and an adjustment knob provided on the adjustment shaft allows the adjustment shaft to be visible through the hollow screw. The solution was to cover it up enough to prevent it from happening.

According to an advantageous embodiment of the invention, the hollow screw is designed as a bearing for the adjusting shaft. The adjustment shaft and the adjustment knob are connected inseparably, and a slit is provided in a plate which is fixed in an unremovable manner without leaving any trace inside the tachograph, and the adjustment shaft is provided with a turned groove assigned to the slit. By configuring this, you can obtain an unobtrusive means of detecting fraud.

The problems of the present invention have been sufficiently and effectively solved by the tachograph of the present invention. In particular, the tachograph of the present invention takes into consideration the design configuration that is prioritized on the front side of the tachograph, and has the advantage that it can be used with any casing shape. The design of the invention is advantageous when applied to tachographs, in which at least one support member of the hinge part of the lid is constructed on the cover, and where higher requirements are placed on the fixing of the cover. It is also particularly advantageous for tachographs with a cylindrical housing that the support of the adjusting shaft is constructed in accordance with the inclined position of the adjusting shaft with respect to the longitudinal central axis of the tachograph. This configuration, in contrast to commonly known tachographs, makes it possible to pass a linear adjustment shaft inside the tachograph casing. In this case, the arrangement of the adjusting shaft and the degree of taper of the bearing are determined by a very narrow gap left between the chart paper used as the record carrier and the casing wall.

The invention will now be explained with reference to the drawings: A tachograph 2 integrated into the instrument panel 1, for example in a manner that coincides with the front surface of the instrument panel 1, is arranged lockably and pivotably in the tachograph casing 5 with a lock 4. The casing 5 includes a lid 3 and a cover 6 that can be detachably connected to the casing 5. In this case, the front surfaces 7 and 8 of the cover 6 and the lid 3, which form the front surface of the tachograph 2, are located on substantially the same plane. Display elements 10, 11 for speed measurements and indicators 12, 13, 14 for time can be read through a window 9 provided in the cover 3, whereas a window 15 arranged in the cover 6 makes it possible to read a distance meter arranged independently of the lid 3. Reference numerals 16 and 17 designate control knobs used to select recording modes corresponding to different tasks of the driver. Reference numeral 18 designates the front pivot gap between the lid 3 and the cover 6.

As shown in the partial sectional view in FIG. 2, with two screws configured as hollow screws (one hollow screw is designated in the drawing by reference numeral 19), the cover 6 is attached to the casing. Fixed to 5. In this case, the fixing can be performed on the front side of the tachograph 2 via the seal member 20. Furthermore, as can be seen in FIG. 2, the adjusting shaft 21 is inserted into the interior of the tachograph 2 through a hollow screw 19, and the adjusting knobs 16 and 17 cover the hollow screw 19 invisibly. Of course, it is also conceivable to embed the hollow screws in the cover 6 and to prevent unauthorized manipulation of one of the two hollow screws with a ring-shaped sealing member, for example. In addition, hollow screws 19 are attached to the adjustment knobs 16 and 17 to prevent unauthorized operation of the hollow screws.
It is also possible to configure an edge surrounding the area. However, it is particularly advantageous as a means to prevent unauthorized manipulation if the adjusting shaft 21 and the adjusting knobs 16, 17 are manufactured as one component, and the adjusting shaft 21 is provided with a turned groove.
2 is provided so that a slit 24 provided in a plate permanently fixed without leaving any traces in the tachograph 2 can cooperate with the turned groove 22. With such a design, the fixing of the cover 6 is ensured in a particularly simple manner and in any case in a way that makes it possible to detect tampering with the necessary components. By means of a connecting member indicated schematically by arrow 25, the adjusting shaft 21 can be operatively connected, for example, to a potentiometer, which is not shown since it is not essential to the invention, or a working time register which can be pivoted to different recording tracks. Operationally coupled with a mechanism. At 26 a chart is shown as a record carrier to indicate its position in the tachograph. In addition, in order to be able to provide the adjusting shaft 21 with a position oblique to the longitudinal central axis of the tachograph, the bore 27 in the hollow screw 19 is designed conically.
A particularly simple construction with a linear adjustment shaft is obtained in this way.

Since the hollow screw 19 must have a relatively large diameter, a strong screw connection is possible for connecting the cover to the casing, and the arrangement according to the invention also makes it possible to secure the cover. The mechanism becomes almost fully hidden despite the large screw diameter.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
FIG. 1 is a front view of a tachograph incorporated in an automobile instrument panel, and FIG. 2 is a partial sectional view taken along section line A in FIG. 1. 1... Instrument panel, 2... Tachograph, 3... Lid, 4...
Lock, 5...Casing, 6...Cover, 7, 8...Front surface, 9, 15...Window, 10, 11, 12, 1
3, 14... Display member, 16, 17... Adjustment knob,
18... Swivel gear, 19... Hollow screw, 20...
Seal member, 21...adjustment shaft, 22...turning groove, 23
...Plate, 24...Slit, 25...Arrow, 26
...Chart paper, 27...holes.

Claims (1)

[Claims for Utility Model Registration] 1. Comprising a casing and a lid that is rotatably disposed in the casing and allows access to each recording member, at least velocity measurement can be performed through a window provided on the front side of the lid. a readable display mechanism and a distance meter disposed independently of the lid, comprising a cover removably coupled to the casing, the front surface of the cover being approximately the front surface of the lid; The opening is located on the same plane and forms the front surface of the tachograph together with the front surface of the lid. In the type of tachograph provided on the cover,
The cover 6 is connected to the casing 5 by a screw connection mechanism that can be operated from the front side, a hollow screw 19 is used as the screw connection mechanism, and an adjustment shaft 21 that transmits the adjustment movement of the adjustment mechanism is attached to the hollow screw. 19, and the adjustment knob 1 provided on this adjustment shaft 21
6 and 17 sufficiently cover the hollow screw 19 so that it cannot be seen. 2. The tachograph according to claim 1, wherein the hollow screw 19 is configured as a bearing for the adjustment shaft 21. 3. The tachograph according to claim 1, wherein the hole 27 of the hollow screw 19 is configured in a conical shape corresponding to the state of the adjustment shaft 21 inclined with respect to the longitudinal central axis of the tachograph. .