Patent Application
20160054125
The invention relates to an optically magnifying apparatus, in particular a pair of monocular or binocular field glasses or a monocular or binocular telescopic sight, night vision device, rangefinder or the like, having a housing with at least one lens barrel for accommodating optical elements, a compass device which is arranged in the housing, at least one electronic device which is arranged in the housing, and at least one accommodation region for at least one power source in the form of a battery or the like.
Said invention therefore concerns the area of field glasses or telescopes which comprise any kind of electrical device and a compass device, wherein the compass device itself can also form the electrical device. However, optical apparatuses with electronic devices such as, for example, illuminated reticles, illuminated division scales, image amplifiers, electronic display elements and the like, are also intended to be covered by said term.
An accommodation region for a battery or the like is provided in order to be able to supply electrical power to such electronic devices or electronic compasses, illuminated reticles, illumination elements and the like.
Depending on their design, batteries can generate disturbing magnetic fields which can have a disadvantageous effect on the accuracy of the display of a mechanical or electronic compass in the optically magnifying apparatus.
The invention is based on the object of designing an apparatus having the features of the preamble of claim 1 in such a way that these kinds of negative influences of a power source on a compass are avoided. This object is achieved by the characterizing features of claim 1, and advantageous developments can be found in dependent claims 2-15.
The essence of the invention is considered to be that of providing a screening device which is concentrated on the accommodation region for the power source or the power source itself. As a result, the compass, which is usually arranged at a certain distance from the power source, in the apparatus remains uninfluenced by disturbing magnetic fields which can be generated by the magnetic fields of the battery or in conjunction with the screening device.
In each case, the screening device is designed such that the Earth's magnetic field is not influenced at the position of the magnetic sensor of the compass.
The screening device is advantageously designed such that the magnetic field lines of the power source are prevented from exiting from the accommodation region by the screening device, wherein the accommodation region is advantageously matched to the outer shape of the at least one power source, and the screening device is arranged between the inner wall of the accommodation region and the outer wall of the power source.
A particularly compact screening device is produced when the screening device is in the form of a housing element which accommodates the battery and is composed of a magnetically screening metal, in particular μ-metal. The screening device can be in the form of a screening sleeve, in particular μ-metal sleeve, which has an open end. This has the advantage that batteries with lengths which differ slightly from one another can then be inserted into the screening sleeve between its poles, without having a negative influence on the contact-connection or the screening. To this end, the closed end of the screening sleeve can be electrically conductively connected to a connection element in the accommodation region, wherein either a permanent connection to a cable or a contact-making connection which is closed when the screening sleeve is inserted into the battery compartment and is pressed against an end-side contact in the battery compartment by way of a contact-pressure spring is possible.
The accommodation region is advantageously cylindrical and provided for accommodating a cylindrical battery, and an open end of the accommodation region is designed such that it can be closed by a screw cap. The screening sleeve is mounted in an accommodation region of this kind in a longitudinally displaceable manner and prestressed in the direction of the screw cap by the connection element which is in the form of a spring.
In a development of the invention, it is possible to also provide the screw cap with a screening cap element which engages over the end of the screening sleeve.
A first pole of the battery which is inserted into the screening element makes electrical contact with the inner closed end of the accommodation cap, and a second, opposite pole of the battery makes contact with at least one contact projection of the screw cap or the screening cap element.
The screening cap element can engage over approximately 10-50% of the length of the screening sleeve, as a result of which particularly effective magnetic screening is ensured.
The invention is explained in greater detail with reference to advantageous exemplary embodiments in the drawing figures, in which:
Drawing
An electronic compass device, which therefore represents an electronic device, is arranged in the lens barrel 4a. An accommodation region 7, which can be closed, for a battery 8 for supplying power to the electronic device, specifically to the compass device 6, is provided in the lens barrel 4b.
As is particularly clear from
In the present case, the accommodation region 7 is matched to the outer shape of the power source, specifically the battery 8, and the screening device 10 is arranged between the inner wall of the accommodation region 7 and the outer wall of the power source 8. Overall, the screening device 10 is in the form of a housing element which accommodates the battery 8, specifically a screening sleeve which is composed of magnetically screening material, in particular μ-metal. The closed end 11 of the screening sleeve 12 is electrically conductively connected to a connection element 13 in the accommodation region 7. An open end 14 of the accommodation region 7 can be closed by a screw cap 15. The screening cap is prestressed against the force of a spring 16 in the bottom region 17 of the accommodation region 7 which also contains a diagnosis plate 18 of the electrical power supply, and is therefore mounted in the accommodation region 7 in a longitudinally displaceable manner. Said screening cap is spring-loaded in the direction of the screw cap 15 by the connection element 13 which is in the form of a spring.
The screw cap 15 has a cap-like element 19 which engages over the end of the screening sleeve 12 and can also serve as a screening cap element 19 if it is formed from an appropriate material.
A first pole 20 of the inserted battery 8 makes contact with the inner closed end 11 of the screening sleeve 12, and at least one contact projection 23 makes contact with a second opposite pole 22 of the battery 8 in the inner region of the screw cap 15.
The screw cap 15 is further provided with a sealing element, in particular with an O-ring seal 24. In the illustrated exemplary embodiment, the screw cap 15 engages over approximately 40% of the length of the inserted screening sleeve 12, the screening sleeve for its part being surrounded at a distance by a contact spring 25 which makes contact with the inner end of the screw cap 15 and therefore connects the pole 22 of the inserted battery 8 to the electronic elements of the diagnosis plate 18 and allows power to be supplied to the electronic components within the pair of field glasses 1.
| Number | Date | Country | Kind |
|---|---|---|---|
| 20 2013 003 631.1 | Apr 2013 | DE | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/DE2014/000196 | 4/16/2014 | WO | 00 |
