Eyepiece unit for endoscopes
The invention relates to an eyepiece unit with an eyepiece mounted in an eyepiece frame and with a coupling element for inserting the eyepiece frame. According to a first embodiment, the eyepiece is mounted so that it can slide axially in the eyepiece frame and can be fixed so that it is individually adjustable in the eyepiece frame. To ensure an easy and rapid adjustment in an eyepiece unit, it is proposed with the invention that the eyepiece can be fixed in the eyepiece frame without screws. According to a second embodiment, the eyepiece frame is mounted in the coupling element so that it slides perpendicularly to the longitudinal axis for adjustment. It is fixed in this adjustment position, according to the invention, because the eyepiece frame can be fixed in the coupling element without screws.
1. An eyepiece unit for endoscopes, with an eyepiece that has at least one lens system and is mounted in an eyepiece frame so that it can slide axially and can be fixed in the eyepiece frame in an individually adjustable adjustment position, and with a coupling element, which can be connected with an endoscope housing, for inserting the eyepiece frame, wherein the eyepiece frame is mounted in the coupling element so that it can slide perpendicularly to the longitudinal axis of the eyepiece unit and can be fixed in an individually adjustable adjustment position in the coupling element, characterized in that the eyepiece can be fixed in the eyepiece frame without screws by means of clamping and/or friction lock for adjustment in the longitudinal direction of the optical system and in that the eyepiece frame can be fixed in the coupling element without screws by means of clamping and/or friction lock for adjustment in the image plane.
2. An eyepiece unit according to claim 1 , characterized in that inside the eyepiece frame, which is configured as an essentially cylindrical sleeve, at least one clamping element is configured which reduces the inner diameter of the eyepiece frame and when installed interacts with the eyepiece inserted into the eyepiece frame.
3. An eyepiece unit according to claim 2 , characterized in that the at least one clamping element takes the form of an O-ring.
4. An eyepiece unit according to claim 1 , characterized in that the eyepiece frame, in order to configure the clamping sleeve, has at least one and preferably three expansion slits running in the axial direction of the eyepiece frame.
5. An eyepiece unit according to claim 1 , characterized in that the eyepiece can be fixed in the eyepiece frame by means of magnetic force.
6. An eyepiece unit according to claim 1 , characterized in that the eyepiece frame can be secured on the coupling element by means of a stopping mechanism.
7. An eyepiece unit according to claim 6 , characterized in that the stopping mechanism takes the form of a bayonet connection.
8. An eyepiece unit according to claim 6 , characterized in that the stopping mechanism takes the form of a catching or screwing sleeve that is mounted on one of the components that are to be connected to one another and can be secured on the respective other component.
9. An eyepiece unit according to claim 6 , characterized in that, to configure the clamping and/or friction lock, at least one pressure element is positioned in the coupling element, so that by means of this pressure element the end surfaces of the eyepiece frame and of the coupling element, which are coupled to one another by the stopping mechanism, can be pressed against one another.
10. An eyepiece unit according to claim 9 , characterized in that the at least one pressure element can be configured as an O-ring mounted in the coupling element.
11. An eyepiece unit according to claim 9 , characterized in that the at least one pressure element can be configured as a spring element mounted in the coupling element.
12. An eyepiece unit according to claim 11 , characterized in that the spring element additionally serves to compensate for thermal and mechanical changes in length.
13. An eyepiece unit according to claim 1 , characterized in that the components—the eyepiece and eyepiece frame on the one hand and/or the eyepiece frame and coupling element on the other hand—can additionally be fixed in the particular adjustment position by means of a cementing material.
14. An eyepiece unit according to claim 1 , characterized in that the eyepiece frame takes the form of an essentially cylindrical clamping sleeve, which when installed surrounds and clamps the inserted eyepiece so that the outer diameter of the eyepiece is slightly greater than the inner diameter of the clamping sleeve.