DE2102883B1

DE2102883B1 - Reading glass

Info

Publication number: DE2102883B1
Application number: DE2102883A
Authority: DE
Inventors: Auf Nichtnennung Antrag
Original assignee: C PROEBSTER JUN NACHF
Current assignee: C PROEBSTER JUN NACHF
Priority date: 1971-01-22
Filing date: 1971-01-22
Publication date: 1972-08-31

Description

Es entsteht damit die Aufgabe, die freien Bandenden 3 und 4 zur Bildung eines geschlossenen Ringes zusammenzufügen. Diesem Zweck dient bei dem Ausführungsbeispiel der F i g. 1 ein Brückenstück 5, das mit den Bandenden 3 und 4 durch Punktschweißung 6 verbunden ist. Der über die Linse überstehende Rand des Bandes 2 ist beiderseits der Linse breit genug, um die Punktschweißungen vornehmen zu können. Es hat sich gezeigt, daß das ohne Schädigung des Linsenglases möglich ist. An Stelle der Punktschweißung könnte verständlicherweise auch Löten oder Kleben treten. Zur Befestigung des Handgriffes mit seiner Schraube ist in das Brückenstück 5 eine Bohrung 7 mit Innengewinde eingearbeitet.This creates the task of forming the free ends of the tape 3 and 4 to put together a closed ring. This purpose is used in the embodiment the F i g. 1 a bridge piece 5, which with the tape ends 3 and 4 by spot welding 6 is connected. The edge of the band 2 protruding beyond the lens is on both sides the lens wide enough to be able to make the spot welds. It has themselves has shown that this can be done without damaging the lens glass. Instead of spot welding could understandably also soldering or gluing. For fastening the handle with its screw, a bore 7 with an internal thread is worked into the bridge piece 5.

Bei dem Ausführungsbeispiel nach F i g. 2 überlappt das Bandende 9 das Bandende 8. Die Oberlappung ist durch Stoffschluß (Löten, Schweißen. Kleben) geschlossen. Aus dem Bandende 9 ist ein Nippel 10 mit Innengewinde herausgedrückt, um eine größere Einschraublänge für die Schraube des Handgriffes zu schaffen. Ein solcher Nippel könnte auch aus dem Brückenstück 5 heraus gedrückt sein. In the embodiment according to FIG. 2 overlaps the end of the tape 9 the end of the tape 8. The overlap is made by material connection (soldering, welding, gluing) closed. A nipple 10 with an internal thread is pressed out of the tape end 9, to create a larger screw-in length for the screw of the handle. A Such a nipple could also be pressed out of the bridge piece 5.

Die freiliegende Stoffschlußverbindung wird zweckmäßigerweise durch ein Abblendstück über- deckt. Eine besondere Ausführungsmöglichkeit hierfür ist in F i g. 3 dargestellt. die auf das Ausführungsbeispiel nach Fig. I zurückgreift. In das Brückenstück 5 wird die Schraube il des Handgriffes 12 eingeschraubt, jedoch ist das Verschlußstück 5 durch ein Zwischenstück 13 überdeckt, und zwar in der besonderen Ausführung eines Brückenstückes. Wird die Schraube 11 in die Gewindebohrung 7 eingeschraubt und legt sich dabei die Fläche 14 des Handgriffes 12 gegen die Fläche 15 des Zwischenstückes 13, so werden dessen Kanten 16 gegen das Band 2 gedrückt. Es entsteht eine auf die Verschraubung 7, 11 wirkende Kraft, welche die Schraube 11 in der Gewindebohrung 7 verspannt Das Zwischenstück 13 ist also nicht nur Blendkappe, sondern gleichzeitig spannendes Widerlager. The exposed material connection is expediently through cover a dimming piece covers. A special implementation option for this is in F i g. 3 shown. which falls back on the embodiment of FIG. The screw il of the handle 12 is screwed into the bridge piece 5, however the closure piece 5 is covered by an intermediate piece 13, specifically in the particular Execution of a bridge piece. If the screw 11 is screwed into the threaded hole 7 and the surface 14 of the handle 12 lies against the surface 15 of the intermediate piece 13, its edges 16 are pressed against the belt 2. It creates one on the Screw connection 7, 11 acting force which the screw 11 in the threaded hole 7 braced The intermediate piece 13 is not only a cover cap, but at the same time exciting abutment.

Claims

Claims: 1.. Reading glass with one in a slit ribbon clamped lens, characterized in that the slot between the tape ends (3, 4 or 8, 9) is closed by material connection (welding, soldering, gluing).

2. Reading glass according to claim 1, characterized in that the slot is closed by a bridge piece (5) applied with a material connection (6).

3. Reading glass according to claim 1, characterized in that the slot ends (8,9) merged with overlap and bonded in the overlap are.

4. Reading glass according to one or more of the preceding claims with a screwable Handle, characterized in that the screw nut thread (7) directly cut into the strap (2).

5. reading glass according to claim 4, characterized in that from the Tension band (2) or the bridge piece (5) a threaded nipple (10) is pushed out.

6. reading glass according to one or more of the preceding claims, characterized by one of the screw (11) of the handle, which covers the positive connection (12) penetrated faceplate (13).

7. reading glass according to claim 6, characterized in that the visor cap bridge-like as the screwed handle (11, 7) bracing abutment (15, 16) is trained.

The invention relates to a novel embodiment of a reading glass with a lens clamped in a slotted, grooved band.

The band encompassing the lens must be slit because it is closed Ring whose inside diameter is smaller than the outside diameter of the lens edge receiving groove, the lens could not be inserted. So it has to be There is a possibility of putting the initially open tape around the lens and the Then fix the ends of the tape with the lens clamped. A special one.

expedient execution of such a tape fastener is in the German Patent 939 171 described. Common to all known reading glasses is that Use of a part that can be described as a turnbuckle with clamp connection. The turnbuckle requires positive locking parts and clamping means to be processed, that is loose parts that are put together after the tape is wrapped around the lens.

The object of the invention is the formation of the closure of the free Ends of the tensioning band in such a way that a special tensioning part for manufacture the clamp connection is not required.

This object is achieved according to the invention in that the slot is closed between the ends of the tape by material connection, this material connection can consist of welding, soldering or gluing, depending on the circumstances. The tape will with the required Tension is placed around the lens engaging the band groove, and the material connection is then established. The necessary Operations are simple, so that the manufacture of the reading glasses according to the invention is significantly cheaper.

A further development of the production of the material connection free tape ends consists in the fact that the slot is applied with a material connection Bridge piece is closed, the material connection expediently by spot welding is made.

Another development is that the tape ends with an overlap are joined together and connected in the overlap with a material bond. Suitable for this soldering is particularly good.

The welded or soldered connection can also go through in both cases an adhesive bond to be replaced after the modern technology adhesive higher Has also developed adhesive strength for metal.

Attempts with straps made of a plastic have so far can not achieve a satisfactory result because of the synthetic resins in question flow cold, so the tension disappears over time. Should be in further development Resins would be found that can be used as straps for lenses, so would The material connection of the strap ends is probably even easier than with metal straps can be produced.

The clamping elements of the known reading glasses were molded bodies in which the thread for the screws of the handle was cut. That means too an increase in the price of the reading glass. A substantial simplification can be made according to achieve a development of the invention in that the thread for screwing of the handle is cut directly into the strap. It should be show that the number of threads is too small due to the small thickness of the tape, this can be remedied in a simple manner by removing the tension band a threaded nipple is pushed out. Such a nipple can also be used with the bridge-like End piece to be expressed forth.

The invention is based on the exemplary embodiments shown in the drawing explained. It shows F i g. 1 a first embodiment in a plan view and a view of the invention, FIG. 2 in the same illustration a second embodiment, 3 shows a particularly useful connection of the handle with a band setting.

The lens is only indicated in the figures. In the embodiment according to FIG. 1, a slotted tensioning strap 2 is placed around the lens 1.

Its free ends 3 and 4 are spaced apart from the lens diameter results. This distance is not always the same, but changes with the tolerance of the lens diameter. The lens diameter, which changes with the tolerance, is at all the reason that versions of this type were developed.