DE102007004343A1 - Eye-cup for eye-piece case, has internal thread mounted in axial direction, where eye-cup is implemented one-piece, adjustable in axial direction relative to eye-piece case and formed to be removable from eye-piece case - Google Patents

Abstract

The eye-cup (50) has an internal thread (51) mounted in an axial direction, where the eye-cup is implemented one-piece, adjustable in the direction relative to a eye-piece case (10) and formed to be removable from the case. An elastic inner flange (53) runs in a circumference direction and provided at an end (52) of the eye-cup. The flange completely extends over the circumference of the eye-cup, which is made of elastomer or rubber. The inclination of the thread is selected such that a preset axial adjusting area is passed by rotation of the eye-cup around an angle between 90 and 180 degrees. An independent claim is also included for an eyepiece with an eyepiece case.

Description

The The invention relates to an eyecup for an eyepiece housing, in the axial direction relative to the eyepiece adjustable and is designed detachable from the eyepiece housing. The invention further relates to an eyepiece housing, in particular with a Diopter adjusting ring, with such an eyecup. Farther the invention relates to an eyepiece with a device for diopter adjustment, a Dioptrieeinstellring, the rotatable about the eyepiece housing of the eyepiece is mounted, for the axial movement of a lens group in the eyepiece. Finally, the invention relates a combination of such an eyepiece with said eyecup and a microscope with such an eyepiece.

Eyepiece housing with eyecups, which are arranged displaceably along the longitudinal axis of the eyepiece to be able to set an optimal position of the eye to the exit pupil of the eyepiece for both eyeglass wearer and normal eyesight, are known. For example, in the US-5,784,207A allows such a longitudinal adjustment by means of a groove-screw connection, being produced by leaf spring elements detents. A similar groove-pin guide for an eyepiece housing with adjustable eyecup is from the DE 299 04 366 U1 known. The detent is generated here by an angular change in direction of the guide. A disadvantage of both arrangements, the risk of wear during prolonged use and the lack of possibility of disassembly of the eyecup for the purpose of replacement or cleaning.

From the DE 101 39 173 C1 An arrangement for rotatably adjusting a cap on an eyepiece housing is known. The eyepiece has for this purpose three pins which are arranged in the circumferential direction and pointing radially outwards, while the cap has correspondingly three grooves which are arranged on the inside of the cap, in the axial direction and rise over a part of the circumference of the cap extend. The cap is placed with the groove edges on the corresponding pin on the eyepiece housing and can be brought by turning counterclockwise in a first detent position. The detent is made by recessing the groove. By further turning the cap in a clockwise direction, it can be pushed onto the eyepiece housing, wherein different detent positions can be taken by local recesses. The change of direction of rotation here represents a safeguard against unintentional lifting of the cap. Both the cap and a rubber-elastic coating surrounding the cap can be removed in the arrangement proposed here for the purpose of replacement or cleaning. In the solution proposed here, the heads of the pins slide under a bias generated by the elastically deformable plastic-made cap by deformation on the running surfaces of the grooves. This results in a difficult adjustment, which is also vulnerable to abrasion. This explains that emphasis is placed here on abrasion-resistant material with a low coefficient of thermal expansion for the cap and on polished surfaces of the heads of the pins in order to promote lubricity and service life. The removability of the cap is cumbersome as well as the rubber-elastic coating. Another disadvantage is the bipartite of the eyecup.

The Optics of the eyepieces is designed so that the exit pupils in ergonomically correct distance to the front lens of the eyepiece lie. It should be noted that the distance of the eye to the front lens of spectacle wearers larger is as normal sighted. These are eyepieces with larger Distance between the front lens created to the exit pupil, the additional Consider the distance between the eye and the lens. Are such eyepieces used by non-eyeglass wearers, an eyecup must be placed on the eyepiece to the make extra distance and make a light contact to allow eyebrows with the eyepiece or eyecup edge. It should be noted that the normal user as the Eyeglass wearer contact with the eyepiece or eyecup edge examined.

eyecups are often part of eyepieces with facilities for diopter adjustment. The latter usually have a Dioptrieeinstellring rotatably around the eyepiece housing of the eyepiece is supported by rotation of the Dioptrieeinstellrings to move a lens group in the eyepiece axially. The term lens group should hereby comprise any arrangement of lenses (even a single lens), which is necessary for dioptre adjustment.

at Eyepieces with a device for diopter adjustment should the Diopter adjustment for the individual user easy possible and easily reproducible. Once set Diopter adjustment is intended when using the eyepiece in the position remain. Especially with a manipulation of the eyecup the Dioptrieeinstellposition should not be moved unintentionally can.

Farther it is desirable, especially if hygienic Because the eyecups are easily replaceable, so that every user can put on his own eyecup.

Object of the present invention is first to provide an eyecup for an eyepiece, which is adjustable in a user-friendly way and at the same time interchangeable. Continue to a suitable for such an eyecup eyepiece housing can be specified. In a further aspect of the invention, the object is to provide an eyepiece with a device for diopter adjustment, wherein an unwanted adjustment of a once set diopter adjustment is possible excluded. Finally, the present invention has for its object to provide an eyepiece that optimally combines a device for diopter adjustment with an eyecup. Here is a set Dioptrieeinstellung when using the eyepiece (contact) does not move unintentionally, especially not with an adjustment of the eyecup.

These Task is initially according to the invention through an eyecup for an eyepiece housing, in the axial direction relative to the eyepiece adjustable and detachable from the eyepiece housing, solved, the eyecup is made in one piece and with a rising in the axial direction, molded into the eyecup Internal thread is provided. The associated eyepiece housing characterized by the fact that it has an external thread, to engage the female thread of the eyecup is. Advantageous embodiments emerge from the respective subclaims as well as the following description.

The one-piece eyecup is as a whole from the eyepiece housing removable. The eyecup can as a whole, for example, by compression molding or injection molding. The eyecup is either screwed onto the eyepiece housing and wegschraubbar of this and thus made removable or at least partially so elastic formed by deformation of the corresponding sections of the Eyecup to remove them from the eyepiece housing or on the eyepiece housing is applied. That on the inside surface The eyecup molded internal thread is with an external thread on the outer surface of the eyepiece housing to engage. The movement is designed via a thread very low friction and thus easier to handle than the movement over known groove-pin connections. The one-piece shape of the eyecup Finally avoids that for hygienic reasons elastic covers must be removed from a cap and in particular allows easy production of the Eyecup. Each user can thus create his own eyecup use.

It is advantageous if the substantially cylindrical Eyecup at its one end extending in a circumferential direction having elastic inner collar. The collar is again beneficial formed in one piece with the eyecup and runs at least partially directed radially inward. Such a collar is beneficial to stops during the adjustment of the eyecup define. For this purpose, the eyepiece housing with advantage a circumferentially formed undercut, in the axial Direction on one side of the external thread of the eyepiece housing, on the other side of an axial stop on the eyepiece housing is limited. Appropriately, then - at Use - the collar of the eyecup in the backstitch of the eyepiece housing. By pushing the collar either to the axial stop on the eyepiece or to the external thread of the eyepiece is a possible adjustment range defined, ie two limit positions the eyecup relative to the eyepiece housing. This adjustment range is then done by turning the eyecup around the eyepiece housing run through.

In In this context, it is advantageous if on the undercut Height markings are applied in the axial direction. When twisting the eyecup around the eyepiece housing, causing the eyecup is in the axial direction relative to the eyepiece housing moved, then height marks are visible, based derer the relative position of the eyecup to Okulargehäuse read by the user.

It is advantageous if the collar of the eyecup is sufficient Has elasticity to the removability of the eyecup to ensure the eyepiece housing. Especially should be ensured easy removability. At the Removing the eyecup from the eyepiece housing will thus the collar is bent elastically. The same applies in the opposite direction for putting the eyecup on the eyepiece housing. It can be particularly beneficial if the entire eyecup corresponding elasticity to a complete Pull down the eyecup from the external thread of the eyepiece housing to enable. The same applies to the reverse Direction. When pulled down deforms in this case consequently the eyecup so that the peaks and valleys overcome the external thread of the eyepiece housing become.

It is advantageous if the eyecup made of an elastomer or Rubber is made. This is silicone or rubber with a hardness of 70 ± 5 shore A.

It is also advantageous if the pitch of the internal thread of the eyecup is selected such that the predetermined axial adjustment range can be traversed by rotation of the eyecup by less than 180 °. In this way, the entire adjustment can be traversed with a maximum of half a turn of the eyecup. Even cheaper are smaller turning ranges, preferably between 90 ° and 180 °. It has proved particularly advantageous if the rotation is 120 ° in order to pass through the adjustment range. This can be conveniently done with one hand.

In an advantageous embodiment comprises the eyepiece housing a Dioptrieeinstellring as part of a device for Diopter. The statements made about the Eyepiece housing can then be directly on the Diopter adjustment ring are transmitted when the eyecup at Diopter adjusting ring is attached.

One Another main aspect of the invention relates to an eyepiece with a Diopter adjustment device. As already mentioned The connecting idea of this aspect is that of the eyecup in that the diopter adjustment device in use The eyecup is not unintentionally adjusted. One use The eyecup is initially present when a User through the eyecup into the eyepiece looks, with the Users usually eyebrows or the lenses brings in contact with the eyecup. Further use of the Eyecup takes place when the user (as a spectacle wearer) screw the eyecup onto the eyepiece housing, with in other words, reduce the height, or (as a normal person) the eyecup screws in the opposite direction to the To increase height (with height Here is the distance of the front lens from the top of the eyecup meant).

The eyepiece according to the invention, which has a diopter adjusting ring, which is rotatably mounted about the axis of the eyepiece, to a Moving lens group in the eyepiece in the axial direction is characterized characterized in that the Dioptrieeinstellring an internal toothing along its circumference, and that an elastic element attached to the outside of the eyepiece housing is, wherein a free end of the elastic element in the internal toothing engages the Dioptrieeinstellrings. In this construction will the fineness of the diopter adjustment by the density of the teeth certainly. The elastic element, which is for example can be a resilient metal wire (spring steel wire), is used to adjust the diopter when turning the Dioptrieeinstellrings a groove of the internal toothing pushed and snapped into one of the adjacent Grooves. Due to the elasticity is the release and re-engagement of the element in a groove of the internal toothing possible. At the same time thereby the ease of movement the adjustability of the diopter adjustment are designed, wherein this essentially corresponding to the elasticity of the element is to be measured. The stronger, for example, the springy Steel wire is biased towards the internal gear groove, the heavier the adjustability of the Dioptrieeinstellrings be.

It is advantageous when the engagement of the elastic element in a groove of the internal teeth when turning the Dioptrieeinstellrings acoustically is perceptible. Also this purpose is fulfilled by a springy Metal wire, especially if he also trained in a metal Internal toothing snaps into place.

Around keep the radial dimension of the eyepiece as low as possible, It is particularly advantageous if the internal teeth on a Ring, in particular metal ring, is formed in the Dioptrieeinstellring is admitted. When using a linear elastic element, like a spring steel wire, this can be aligned in the axial direction are aligned with one side or one end attached to the eyepiece, so a fixed eyepiece be. The other, free end then engages in the internal toothing of the diopter adjustment ring. Here it makes sense when on the outside of the Dioptrieeinstellrings a Dioptrieskala is applied, the zero position in the axial extension of the linear elastic element (steel wire) is located. The diopter scale can then on both sides of the zero position in the circumferential direction be applied to the Dioptrieeinstellring, wherein after turning of the Dioptrieeinstellrings the set diopter over the index line given by the steel wire on the diopter scale read.

The inventive possibilities of adjustment the difficulty or ease of diopter adjustment over the elastic element, in particular together with the possibility the audible warning of a change in the diopter setting, can effectively prevent an unwanted adjustment of the Prevent diopter when using the eyecup. At least, though may be an accidental adjustment due to the audible Warning signal ("click") noticed and undone again be made. Does the corresponding eyepiece have an eyepiece housing? with a diopter adjusting ring and an eyecup after the first Aspect of the invention is thus a respect to the adjustment eyecup and diopter number are easily manageable and reliable Instrument given to the user.

Eye cup, Eyepiece housing and eyepiece with Dioptrieeinstelleinrichtung are particularly suitable for use in microscopes. But also for use in binoculars, spotting scopes and telescopes be explicitly noted.

In the following, an embodiment of the invention with reference to the accompanying drawings and explain their benefits in more detail.

The individual features of the above and explained below Invention are not only in the particular combination specified, but also usable in other combinations or in isolation, without departing from the scope of the invention.

1 shows an eyecup according to the invention with a suitable eyepiece housing in the cutout as a longitudinal section,

2 shows a section of an eyepiece according to the invention with a device for diopter adjustment also in longitudinal section,

3 shows a perspective view of a section of an eyepiece with a device for diopter adjustment according to the invention,

4 shows an inventive eyepiece in a two-part view in plan view or as a longitudinal section and

5 shows the perspective view of an eyepiece eyecup according to the invention.

1 shows an eyecup according to the invention in longitudinal section, the sake of clarity, only the upper part is shown (see 4 ). The eyecup 50 is substantially cylindrical and has an upper edge 54 to which a user usually leans the eyebrows or the spectacle lens into the eyepiece 70 (see. 4 ) to look. Accordingly, the upper edge should 54 be soft so that the lenses do not scratch. Furthermore, the eyecup has 50 a rear end 52 on top of a collar 53 is completed. In the inner surface of the cylindrical portion of the eyecup 50 is a multi-start internal thread 51 molded (for example, thread M42 × 2 6H, 12 starts). The eyecup 50 is molded in one piece from elastomeric material (here silicon rubber, hardness 70 ± 5 shore A) and can be prepared in a known manner by compression molding or injection molding.

It It should be noted that here and below with the directions above / front and below / behind respectively is meant in the axial direction in the direction of the user or in the opposite direction by the user path.

1 shows the eyecup 50 in cooperation with a Dioptrieeinstellring 10 , It should be mentioned at this point again that instead of the Dioptrieeinstellrings 10 may also be an eyepiece housing, if the corresponding eyepiece has no Dioptrieeinstellring. The eyecup according to the invention is in principle also for eyepieces without Dioptrieeinstellring 10 suitable. The diopter adjustment ring 10 has an external thread 12 in which the internal thread 51 the eyecup 50 can intervene. Furthermore, the Dioptrieeinstellring has 10 a circumferentially extending undercut 13 whose axial extent on the front side of the external thread 12 , on the rear side of the axial stop 14 is limited.

In the axial direction are on the undercut 13 height markings 15 applied in 1 are shown only by way of example.

How out 1 apparent, the inner collar emerges 53 in the backstitch 13 of the diopter adjustment ring 10 one, leaving the collar 53 with the axial stop 14 defines a rear endpoint and the collar 53 with the rear portion of the external thread 12 defines a front end point, wherein between the two end points the eyecup is adjustable. The degree of (height) adjustment can be adjusted to the height markings 15 read off.

To put on the elastic eyecup 50 simply over the external thread 12 of the diopter adjustment ring 10 in principle, it is sufficient if the collar 53 this the external thread 12 overcomes. More suitable, however, is the placement of the eyecup 50 by pressing the same on the Dioptrieeinstellring 10 until the collar 53 on the circumferential axial stop 14 of the diopter adjustment ring 10 is pressed. This causes the eyecup 50 not tilted and properly in the thread 12 locks. By turning the eyecup 50 can now any meaningful distance from the front lens 60 (see. 4 ) to the edge 54 the eyecup 50 be set. The greatest possible distance is given by the fact that the collar 53 at the thread 12 noticeably strikes. To remove or replace the eyecup, this can be due to the soft and thus stretchable material on the external thread 12 to be pulled.

2 shows a section of an eyepiece in longitudinal section (see. 4 ) to illustrate the device for diopter adjustment. The Dioptrieeinstellring is again with 10 designated. At the far end 11 of the diopter adjustment ring 10 is a steel ring connected to it 20 with an internal toothing 21 admitted. At the outer diameter 31 of the fixed eyepiece part 30 there is an axially parallel groove 32 into which a springy steel wire 40 is embedded. The steel wire 40 is with its rear end 41 with the fixed eyepiece part 30 (see. 3 ) firmly connected. The other (front) The End 42 here is slightly bent outward, leaving it in a groove of toothing 21 of the steel ring 20 locks. (See also the perspective view of the 3 .) The paraxial steel wire 40 also serves as an index line for the zero diopter adjustment.

3 shows the elements 2 again in a perspective view. Regarding the explanations on the individual elements, let me be 2 directed. On the diopter adjustment ring 10 there is a diopter scale 16 , by means of which the adjusted diopter number on the basis of the index line, given by the steel wire 40 (Extension of the direction of the steel wire 40 in the axial direction), can be read. Well visible in 3 the internal toothing 21 and the engagement of the steel wire 40 in the internal toothing 21 or in the individual grooves of this internal toothing 21 , By the detent is the set position of Dioptrieeinstellrings 10 held. The position does not need to be actively secured, which minimizes the risk of accidental adjustment. To adjust the diopter, only the resistance of the detent must be overcome. If this is (accidentally) the case, a (warning) click sound is audible. This sound is created by the re-engagement of the steel wire 40 in the internal toothing 21 , The resistance of the detent against misalignment can be designed in particular such that the diopter in a normal use of the eyecup 50 Be it through contact with the user or by adjusting the height of the eyecup 50 , remains unchanged or is difficult to adjust. As a result, the operating safety and ease of use compared to known such eyepieces can be significantly increased.

4 shows a two-part view of an eyepiece 70 , wherein in the lower half of a plan view, in the upper half of the corresponding section is shown in the longitudinal direction. The lower part of 4 shows from left to right (or from top to bottom for the user): the eyecup 50 , the altitude marks 15 on the diopter adjustment ring 10 , the diopter adjustment ring 10 and the fixed eyepiece part 30 with a clamping screw 71 for the tube on which the eyepiece 70 to attach. In the sectional view of the upper part of 4 is the eyecup 50 with its upper edge 54 as well as the internal thread 51 shown. 10 again designates the Dioptrieeinstellring, with respect to the details of Dioptrieeinstellrings 10 and the eyecup 50 to the explanations related to 1 is referenced. Supported in the axial direction is the eyepiece lens group 61 , which consists of two lens groups, the front lens with 60 is designated. The distance from the front of the front lens to the (radially extended) edge 54 the eyecup 50 gives the "height" of the eyecup 50 on, as indicated by the altitude markings 15 is reflected. By turning the diopter adjustment ring 10 around the axis of the eyepiece 70 becomes the thread 17 moved in the axial direction, that with the lens group 61 is firmly connected.

Regarding the relationship of the fixed eyepiece part 30 with the diopter adjustment ring 10 , in particular the locking mechanism of the steel wire 40 , to the explanations to 2 directed.

Further illustrated in 4 is a reticule 62 in a corresponding thread 63 is held. Such reticles 62 are structurally conditioned in the intermediate image plane of a microscope. Intermediate image and reticule 62 be with the eyepiece 70 considered. If both images are to be viewed simultaneously, users with diopter errors of the eye must be able to refocus the eyepiece lenses. This is done via the already explained Dioptrieeinstelleinrichtung. With 64 a roughness is suggested, which serves to avoid reflections in the intermediate image plane.

5 finally shows a perspective view of the eyepiece 70 with an eyecup 50 in the upper part, followed by a Dioptrieeinstellring 10 and the fixed eyepiece part 30 , On the fixed eyepiece part 30 is the axially aligned steel wire 40 to recognize, which can serve as an index line for the diopter adjustment.

The aspects of the eyecup and the Dioptrieeinstelleinrichtung invention complement each other, as shown by the 1 to 5 represented, ideally to an eyepiece according to the invention, which can be used not only in microscopes, but also binoculars, spotting scopes or telescopes and other similar optical instruments with advantage.

10

Dioptrieeinstellring; eyepiece

11

rear End of the diopter adjustment ring

12

external thread

13

undercut

14

axial attack

15

height marker

16

dioptric

17

thread

18

Facility for diopter adjustment

20

Steel ring, metal ring

21

internal gearing

30

solid eyepiece

31

outer diameter

32

groove

40

Steel wire, Metal wire, elastic element

41

rear The End

42

front End, free end

50

Augenmuschel

51

inner thread

52

rear The End

53

internal collar

54

edge (Upper)

60

front lens

61

eyepiece

62

reticle

63

thread for reticule

64

roughening

70

eyepiece

71

clamping screw

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• US 5784207 A [0002]
• DE 29904366 U1 [0002]
• - DE 10139173 C1 [0003]

Claims (19)

Eyecup ( 50 ) for an eyepiece housing ( 10 . 30 ) in the axial direction relative to the eyepiece housing ( 10 . 30 ) adjustable and from eyepiece housing ( 10 . 30 ) is detachable, characterized in that the eyecup ( 50 ) in one piece and with a rising in the axial direction, in the eyecup ( 50 ) formed internal thread ( 51 ) is provided. Eyecup according to claim 1, characterized in that the eyecup ( 50 ) at one end ( 52 ) a circumferentially extending elastic inner collar ( 53 ) having. Eyecup according to claim 2, characterized in that the collar ( 53 ) completely over the circumference of the eyecup ( 50 ). Eyecup according to claim 2 or 3, characterized in that the collar ( 53 ), in particular the entire eyecup ( 50 ), has sufficient elasticity to increase the removability of the eyecup ( 50 ) from the eyepiece housing ( 10 . 30 ) to ensure. Eyecup according to one of claims 1 to 4, characterized in that the eyecup ( 50 ) is made of an elastomer or rubber. Eyecup according to one of claims 1 to 5, characterized in that the pitch of the internal thread ( 51 ) is selected such that a predetermined axial adjustment range by rotation of the eyecup ( 50 ) is traversable by less than 180 °, preferably by an angle between 90 ° and 180 °, more preferably by 120 °. Eyepiece housing with an eyecup according to one of claims 1 to 6, wherein the eyepiece housing ( 10 . 30 ) an external thread ( 12 ), which with the internal thread ( 51 ) of the eyecup ( 50 ) is to be engaged. Eyepiece housing according to claim 7, characterized in that the eyepiece housing ( 10 . 30 ) a circumferentially formed undercut ( 13 ), which in the axial direction on one side of the external thread ( 12 ) of the eyepiece housing ( 10 . 30 ), on the other side of an axial stop ( 14 ) on the eyepiece housing ( 10 . 30 ) is limited. Eyepiece housing according to claim 8 with an eyecup according to one of claims 2 to 4, characterized in that the inner collar ( 53 ) of the eyecup ( 50 ) is designed in such a way that he in the undercut ( 13 ) of the eyepiece housing ( 10 . 30 immersed). Eyepiece housing according to claim 8 or 9, characterized in that on the undercut ( 13 ) in the axial direction height markings ( 15 ) are applied. Eyepiece housing according to one of claims 7 to 10, comprising a Dioptrieeinstellring ( 10 ). Eyepiece with a device ( 18 ) for diopter adjustment, which includes a diopter adjustment ring ( 10 ) rotatable about the axis of the eyepiece ( 70 ) is mounted for axial movement of a lens group ( 61 ) in the eyepiece ( 70 ), characterized in that the Dioptrieeinstellring ( 10 ) an internal toothing ( 21 ) along its circumference, and in that an elastic element ( 40 ) is mounted on the outside of the eyepiece housing, with a free end ( 42 ) of the elastic element ( 40 ) in the internal toothing ( 21 ) of the diopter adjustment ring ( 10 ) intervenes. Eyepiece according to claim 12, characterized in that the internal toothing ( 21 ) on a metal ring ( 20 ) formed in the Dioptrieeinstellring ( 10 ) is admitted. Eyepiece according to claim 12 or 13, characterized in that the elastic element ( 40 ) as a springy metal wire ( 40 ) formed with one end ( 41 ) on a fixed eyepiece part ( 30 ) is attached. Eyepiece according to claim 14, characterized in that on the Dioptrieeinstellring ( 10 ) a diopter scale ( 16 ) whose zero position in axial extension of the axially oriented metal wire ( 40 ) lies. Eyepiece according to one of claims 12 to 15, characterized in that the engagement of the elastic element ( 40 ) in a groove of the internal toothing ( 21 ) when turning the Dioptrieeinstellrings ( 10 ) is acoustically perceptible. Eyepiece according to one of claims 12 to 16 with an eyepiece housing according to claim 11. Microscope with an eyepiece ( 70 ) according to any one of claims 12 to 17. Microscope with an eyecup ( 50 ) or an eyepiece housing ( 10 . 30 ) according to one of claims 1 to 6 or 7 to 11.