Patent Application
20220404605
The invention relates to a flexible stop as claimed in claim 1 and to an optical apparatus having same as claimed in claim 15.
Various optical stops with which the incidence of light into optical apparatuses can be reduced or stopped or, the other way round, which prevent light from leaving, are known from the prior art. Attachment devices that either digitize or condition the optical radiation or inject information, data or graphics into the beam path are increasingly being used in particular in telescopic sights. In this way it is possible for a second person, for example, to follow along on a screen with respect to what the shooter perceives through the telescopic sight, to make optical radiation visible in the first place using night vision technology or to display target marks and shooting information, such as wind, shooting distance and projectile data and the setting of the adjustment wheels and turrets of the telescopic sight.
A problem here is that the telescopic sight and the attachment device have no standardized interface. For example, there are huge bandwidths of diameters of telescopic sight housings, in particular in the area of its objective and eyepiece. On the other hand, the attachment devices are often produced by other suppliers than the telescopic sights, meaning that coordination becomes difficult. Due to the lack of an interface, light can penetrate the intermediate space between the telescopic sight and the attachment device, resulting in a loss of image quality all the way to a complete inability to recognize anything. On the other hand, light, in particular of the attachment device, can also emerge from the interface. This scares up sensitive animals, and the shooter may be spotted.
For this reason, stops are used that are made from rubber using expensive molded parts which form a sealing ring between the telescopic sight and the attachment device. Due to the small quantities for the respective telescopic sight-attachment device interfaces, the costs of the molded parts are high because of the expensive toolmaking and expensive set-up times.
It is therefore an object of the invention to provide a stop that is suitable for a large number of different interfaces between the telescopic sight and the attachment device and is cost-effective to produce.
The main features of the invention are specified in claims 1 and 15. Configurations form the subject matter of claims 2 to 14 and 16 to 18.
The invention relates to a flexible stop for optical apparatuses, having a flexible surface element which, in a first state, has a flat and planar shape and, in a second state, is rolled or wound into a hollow roll, having at least two tensioning cords which, in the second state, are guided around the hollow roll and hold the hollow roll in the rolled or wound shape.
Using the flexible surface element, the stop can be adapted for example to different objective diameters of telescopic sights and diameters of the connecting piece of an attachment device. The roll can be rolled or wound cylindrically or in the shape of a cone frustum. The ends of the roll thus readily adapt to the diameter of the telescopic sight and the attachment device. Using the tensioning cords, the stop can then be mounted on the telescopic sight and attachment device. This prevents the situation in which disturbing light reaches the area between the telescopic sight and the attachment device. Likewise, for example, no light from the display of the attachment device can emerge from between the latter and the telescopic sight either. The stop preferably consists of a material which is not detectable thermally, in particular in the infrared range from 780 nm to 1 mm. For this purpose, said stop should have a low heat storage capacity. Also suitable herefor are for example particular types of fabric mixtures.
According to an optional configuration, the tensioning cords in the second state are in each case guided through at least two cord tunnels which are arranged or formed on the surface element. In this way, the tensioning cords cannot slide out of place and correspondingly reliably hold the tension and hold the roll in shape.
Advantageously, the cord tunnels can be formed by sewn-on tabs or straps. This is easy to produce, robust, and allows simple threading of the tensioning cords. In addition, the tensioning cords are effectively prevented from sliding out of place on the surface element.
In one preferred configuration, the tensioning cords are secured in the second state with in each case one tensioning element or a clamp. This allows simple tensioning and also re-tensioning, if needed. Ends of the tensioning cords can optionally be knotted together to ensure that they do not unintentionally slide through the tensioning element or the clamp. Optional end sleeves on the tensioning cords, e.g. made from tube material, allow simple threading and prevent fraying.
In a special variant, tension elements or the clamps are fixed in each case at the flexible surface element, preferably at its periphery. In this way, the tensioning cords have at least one defined position, the tension elements or the clamps will not be lost, and handling is easier.
In one advantageous configuration, provision is made for at least one of the tensioning cords to be guided around the hollow roll in the region of a first end of the hollow roll and for a further one of the tensioning cords to be guided around the hollow roll in the region of a second end of the hollow roll. In this way, the respective tensioning cord can be tensioned fixedly on the roll because the roll is then supported in the mounting state from the inside by a tubular body or an attachment device. The latter are thus tightly enclosed, and light can no longer reach the intermediate space between, for example, the telescopic sight and the attachment device.
It is preferably proposed that the tensioning cords are rubber cords. The latter exert a continuous tensioning force and reliably hold the stop in the desired position.
Specifically, the flexible surface element can have at least one first layer made of a textile fabric. Fabric is robust, can be configured to be non-glossy and is difficult to detect thermally,
Optionally, the flexible surface element can have at least one second layer made of a textile fabric. A second layer reduces the transmittance and it is easier to functionally design the upper and lower sides of the stop, for example with different camouflage patterns and surface structures.
Further optionally, the flexible surface element can have at least one stabilization layer made of a bendable plate material or film material. This gives the stop a greater stiffness and prevents, for example, other parts of the stop from projecting into the interspace between a tubular body and an attachment device, for example textile fabric that sags or has been “lashed together.” The stabilization layer can be a flexible plastics element.
Optionally, the stabilization layer is arranged between the first and the second layer. In this way, the stabilization layer can be designed in view of its stiffness and opacity, without taking into account color and gloss, for example. The stabilization layer is preferably sewn in between the first and the second layer. With further preference, there is also a connection between the stabilization layer and the first and/or the second layer by way of the surface. In this way, especially the inner layer cannot sag away from the stabilization layer. Sewing, lamination or adhesive bonding are suitable to form the connection. This also prevents the first and the second layer from migrating around the stabilization layer.
Provision is furthermore made advantageously for an upper side and a lower side of the flexible surface element to be configured in the same way so that it is possible to use the upper side or the lower side as the outer side of the hollow roll. It is hereby possible by turning over, for example, to perform a color change of the stop. Preferably, cord tunnels, which can be formed in particular by sewn-on tabs or straps, are then provided on the upper side and lower side.
Specifically, the upper side and the lower side have different camouflage patterns and/or surface structures. The stop can thus be used on both sides, for example during the day and at night, or during the summer and in winter. By way of example, a green-brown camouflage pattern can be on one side, and a white/gray/black snow camouflage pattern can be on the other side.
The flexible surface element is preferably opaque. In this way, entry and exit of light are effectively prevented.
The invention additionally relates to an optical apparatus having a tubular body containing an optical unit and having a first open tube end, an attachment device with a device housing, wherein an optical through passage of the device housing is arranged in front of the open tube, and a flexible stop in the second state, as has been and will be described. The flexible stop is here rolled or wound around the open tube end of the tubular body and the optical through passage of the device housing, held in the shape of a tube with the tensioning cords, and thus forms an optical tunnel between the open tube end of the tubular body and the optical through passage of the device housing. The stop according to the invention is thus used to reliably shield the intermediate space between the tube end and the optical three passage from light. Dirt is also prevented from entering. To some extent, it is also possible by using the stop to bridge differently sized distances between the open tube end of the tubular body and the optical through passage of the device housing by them being arranged at different depths in the hollow roll. In a particular embodiment, the surface element is rectangular. Optionally, it can then have outside edges of different lengths. By turning it through 90 degrees, the stop can then roll in two directions, resulting in two different lengths of the hollow roll for different distances between the open tube end of the tubular body and the optical through passage of the attachment device.
Provision is optionally made for the tubular body to be part of an aiming apparatus housing, in particular of a telescopic sight housing or a reflector sight housing. The stop can thus be used to effectively use telescopic sights that must be handled with great sensitivity. without the need for expensive molded parts made from rubber. According to a more detailed configuration, the first open tube end forms an eyepiece housing or an objective housing.
Provision is furthermore made in a specific embodiment for the attachment device to contain an optoelectronic unit, with which optical rays from the optical unit are visualized or digitally processed or data, information or graphics are optically injected into the beam path. Such devices can then be temporarily or optionally combined with the telescopic sight, and the optoelectronic unit supports or monitors for example the shooter. In this way, the optoelectronic unit can have, for example, a display, optical fibres, light-emitting means, residual light amplifiers or an overlay apparatus.
Further features, details and advantages of the invention emerge from the wording of the claims and from the following description of exemplary embodiments on the basis of the drawings. In the drawings:
According to
The surface element 2 is opaque and has, as is clear from
As can furthermore be seen in
Such a flexible stop 1 according to
For this purpose, the tensioning cords 10, 11, 12 are guided in each case through at least two of the cord tunnels 20, 21, 22, 23, 24, 25, 26, 27, 28 and around the roll 3. The tensioning cords 10, 11, 12 are fixed by the first ends in each case in the region of the clamps 13, 14, 15, and they are secured and kept tensioned by the second ends with the clamps 13, 14, 15. As is evident from the positioning of the cord tunnels 20, 21, 22, 23, 24, 25, 26, 27, 28 in
According to
With the optoelectronic unit 63, optical rays from the optical unit 52 can be visualized or digitally processed, by way of example. data, information or graphics can be injected optically into the beam path, or night vision technology can be used.
The optical apparatus 50 according to
The invention is not restricted to one of the embodiments described above, but rather may be modified in a variety of ways.
All the features and advantages that emerge from the claims, from the description and from the drawing, including structural details, spatial arrangements and method steps, may be essential to the invention both individually and in a wide variety of combinations.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2021 115 995.4 | Jun 2021 | DE | national |
