TW201350315A - Method and device for the production of a double eyepiece for safety glasses - Google Patents

Abstract

The method is used for the production of a double eyepiece (2) for safety glasses. The double eyepiece (2) comprising two joined-together single eyepieces (13, 14) is injection molded from a plastics material in one piece and in a form immediately ready for use or immediately ready for an optional additional surface coating step. During injection molding, a first eyepiece partial zone (15) having a first optical function, a second eyepiece partial zone (16) having a second optical function which is different from the first optical function, as well as an eyepiece transition zone (17) between the first and second eyepiece partial zones (15, 16) having a continuous transition from the first optical function to the second optical function is introduced into each of the single eyepieces (13, 14), each of which is associated with a respective eye of a person wearing the glasses. During the injection molding procedure, in accordance with standard DIN EN 166, the double eyepiece (2) is provided with a bombardment strength of at least 45 m/s if the double eyepiece (2) is intended for temple safety glasses or with a bombardment strength of at least 120 m/s if the double eyepiece (2) is intended for full vision safety glasses with a headband.

Description

Method and apparatus for manufacturing binoculars for safety glasses

The content of the German patent application DE 10 2012 207 384.1 is hereby attached.

Field of invention

The present invention relates to a method for manufacturing a binocular for safety glasses. The invention also relates to an apparatus for making such a binocular for safety glasses.

Background of the invention

It is well known that safe eye lenses are made of plastic materials, especially for injection molding, which have a localized area of optically corrected eyepieces with separate deviations. It is also known to have a zoom lens having a continuous transition region between partial regions of the binoculars with a different optical correction function. However, on the one hand, such eyepieces are generally intended to be used only for specified refractive lenses, i.e. not specifically for safety glasses. Such singular lenses are also typically identified by "RX". In another aspect, different regions of the zoom lens, particularly the transition region, are made in an expensive (RX) manufacturing process. This is particularly applicable to lenses of such plastic materials, for which the lens blanks are subjected to injection molding and they undergo a complex forming process. The program includes milling, turning and optical polishing steps.

DE 198 58 849 A1 describes a method and a device for the manufacture of a lens of plastic material. One of the two mold halves used in the associated injection mold comprises a deformable diaphragm. However, the eyepiece thus produced is not intended for use in safety glasses, but is intended for use in normal optical glasses.

US 2003/0030771 A1 describes safety glasses comprising an eyepiece that is injection molded in accordance with the above description and having a respective partial region of the eyepiece that performs an amplification function.

Summary of invention

It is an object of the present invention to provide such a method as initially described which allows for a simple manufacture of one of the binoculars for safety glasses.

A method for manufacturing a binocular for safety glasses, wherein a) the binocular includes two monocular mirrors joined together by a plastic material to be formed into a piece, and is immediately available or ready for use. In the form of a surface coating step selected for addition, b) during the injection molding process, a first eyepiece local region has a first optical function, and a second eyepiece local region has a second optical function, which is different The first optical function, and an eyepiece transition region between the first and second eyepiece local regions, and having a continuity transition from the first optical function to the second optical function are included in each In the monocular, each of the lines is associated with a separate person wearing the glasses, and c) in the injection molding process, according to DIN EN 166, if If the binoculars are to be used for stent safety glasses, the binoculars will have a bombardment intensity of at least 45 m/s, or if the binocular system is intended for a full-field safety eyepiece with a headband, there is a bombardment strength of at least 120 m/s. .

A binocular made by the method according to the invention and advantageously having an optical correction and zooming function is immediately available after the injection molding process. Therefore, in particular, the eyepiece does not require final processing work and can be used immediately in the final combination of safety glasses, for example by simply attaching a bracket arm, a nose pad, a spectacle frame and/or a headband, without A final processing step is performed on the injection molded eyepiece stock. The injection molded plastic material binoculars do not require subsequent complex material processing methods and/or forming methods such as milling, turning and/or optical polishing. The binocular localized region having a different optical function or effect and the continuous transition region have been made in the injection molding process so that any subsequent material processing or forming procedures used to form the different optical eyepiece regions can It is advantageously omitted.

Thus, the method according to the invention is particularly suitable for cost-effective mass production of a pair of eyepieces and safety glasses made therefrom.

If desired, the injection molded binoculars can also be provided with at least one coating, such as a scratch resistant coating and/or an anti-fog coating, before being assembled into finished safety glasses. However, this added surface coating is not mandatory. Moreover, such a coating does not fall into the category of material processing or forming methods described above for forming the different optical eyepiece regions.

Moreover, at the end of the injection molding process, in the preparation of the selected surface coating step, in particular no material processing or forming steps are required Want. Therefore, the binocular can preferably perform the coating procedure immediately if it is removed by the injection molding apparatus.

The injection molding process is also preferably carried out such that after the injection molding process, the binocular has a bombardment strength of 45 m/s (F) or 120 m/s (B) according to DIN EN 166, preferably including a secondary specification standard. . This means that the binocular must be resistant to impact, in particular by a steel ball having a 6 mm nominal diameter and a minimum mass of 0.86 g. The energy of the steel ball at impact is constructed at its speed, ie 45 m/s (F) or 120 m/s (B). One such binocular will be particularly suitable for safety glasses.

The two monoculars of the binocular may be specific monocular or eyepiece components that are clearly separated from each other or that are mutually offset but still joined together in a single piece, as in the case of, for example, monocular support safety glasses. However, this statement also includes certain embodiments in which the monoculars are formed by localized regions that are slightly or completely non-separated from each other or are offset from each other, and are somewhat identical across the wearer. The complete eyepiece of the entire field of view is as in the case of, for example, a full field of view safety glasses with a headband. In any event, in all of the included embodiments, each of the two monoculars is associated with a respective eye of one of the persons wearing the eye.

According to an advantageous embodiment, in the case of the injection molding process, the binoculars are in each case provided with an integrally formed side protective cover or the like on both side edge regions. The two-sided protective cover is a special integral member of the binocular. Since the actual binocular can be manufactured at the same time, which has an optical correction and zoom function and the side protective covers, the manufacturing cost is further reduced. also, The attachment of the side protective covers increases the protective effect of the safety glasses made using the binoculars.

According to another advantageous configuration, the second eyepiece local area is configured such that the wearer's vision is improved over a distance of between 30 cm and 400 cm. This will correct the so-called age-related hyperopia (farsightedness), which will occur with increasing age. The ability to adjust the eye will begin to diminish from about forty years of age, even if there is no person with poor vision. Hyperopia is actually not a non-corrected eye, but a physiological development. In this case, safety glasses with such binoculars are more comfortable and can be viewed effortlessly in many production operations, such as sawing, screwing or welding. Therefore, it is not necessary to convert safety glasses that are safe but not optically corrected into reading glasses, which are not safe from an occupational safety point of view but must be used to provide a better vision for the wearer.

According to another advantageous configuration, the optical correcting effect of the partial area of the second eyepiece is set at a defined correction value during the injection molding process, the correction being preceded by the finite number of reservations prior to the injection molding process. Selected from the correction values. In particular, the second eyepiece local area will have a preferably defined optical correction function during the injection molding process. Limiting to a few predetermined typical corrections would make it possible to manufacture the binoculars in a cost-effective manner, particularly without having to make an expensive deployment for the individual vision of the wearer. With safety glasses having different corrective effects, the wearer will be able to select the pair of glasses whose correction value of the second eyepiece area best meets their needs. According to an advantageous configuration, three different correction values are preferably provided in the range from +0.75 dpt to +3 dpt. The corrections required for age-related hyperopia are typically within this range. The "dpt" is a unit symbol for diopter, the reciprocal of the measured meter unit (1dpt = 1m ^-1 ). This represents the index of refraction of the local area of the eyepiece. The above dpt values can accept tolerances in accordance with DIN EN 166 or DIN EN ISO 8980.

According to another advantageous configuration, an optical neutral effect having a correction value of 0 dpt and an optical quality of 1 or an optical correction effect having a correction value of less than 1 dpt is set in the injection molding process. The first eyepiece is in a partial area. The optical grade 1 is particularly suitable for use at one of the reference points of the monocular of the binocular and/or in one of the regions around the reference point. This reference point is positioned for a typical wearer to be located adjacent the respective pupil of the wearer. Moreover, the aforementioned dpt value for the local area of the first eyepiece can accept a tolerance according to the EN 166 standard. Therefore, the first eyepiece local area may be optically neutral or may have a low optical correction function. The first eyepiece local area is specifically intended for remote viewing, which is generally not impaired by age-related hyperopia. The optical correction function is also selectively provided in a partial region of the first eyepiece to primarily correct another non-emphasic eye of the wearer. The above-mentioned correction with optical neutrality of grade 1 or in a partial region of the first eyepiece is preferably also made at the time of injection molding. A forming final machining operation is not required.

According to a further advantageous embodiment, at least one radius of curvature is provided for the individual eyepieces during injection molding, which in particular changes continuously as a result of the transition from the partial area of the first eyepiece to the partial area of the second eyepiece. As a result, the eyepiece transition region can be made simply and efficiently. The radius of curvature can be variably changed in different directions, such as parallel or perpendicular to the wearer's body The direction of the vertical axis. Here, the radius change is calculated based on the radius of curvature of the first and second eyepiece local regions.

According to another advantageous configuration, the variable radius of curvature is provided on the inner surface of one of the monocular lenses that is particularly concave. The inner surface or the inner side of the eyepiece herein particularly refers to the surface or side of the eye of the wearer facing the wearer. The manufacturing will be simplified since the radius of curvature will only change on one side of the eyepiece, i.e. especially on the inside. Therefore, only the insert for the injection mold to be manufactured, that is, the configuration to be used for the inner surface of the eyepiece, has a more complicated corresponding surface, and in particular, a variable radius of curvature.

Another object of the present invention is to provide such an apparatus as initially described which allows a binocular for safety glasses to be made in a simple manner.

To achieve this another object, a device for manufacturing a binocular for safety glasses comprises: a) a combinable injection mold having an eyepiece inner mold portion and an eyepiece outer mold portion which, when combined, form an empty space a hole in which the liquefied plastic material can be injected to form the binocular, comprising two monocular lenses joined together into one piece, which is ready for use or immediately available for a selective surface coating step, b) The ejection die cavity is configured to form a first eyepiece local region having a first optical function when the respective eyepieces associated with the respective eyes of the wearer are injection molded, and a second eyepiece local region has a second optical function different from the first optical function, and an eyepiece transition region is interposed between the first and second eyepiece local regions and has a a continuous transition from the first optical function to the second optical function; and c) when combined, the inner mold portion of the eyepiece and the outer mold portion of the eyepiece will have a main surface having a continuous surface path as a whole to be made The cavity is defined in the region of the monocular.

The inner surface of the eyepiece and the major surface of the outer mold portion of the eyepiece are specifically corresponding to the inner surface of one of the monoculars to be made and the outer surface of the outer surface, and are opposite to the inner surfaces of the monoculars. The surface and outer surface have an inverted surface profile. At least in the region of the actual field of view of the monocular to be made, such major surfaces are particularly free of discontinuous points and preferably have a continuous thickness, the transition between the (local) regions being continuous And preferably not contoured or visible. The extent of this continuous transition is determined by the geometry of the zoom design corresponding to one of the ophthalmology.

The inner mold portion of the eyepiece and the outer mold portion of the eyepiece can also be understood, in particular, as a mirror image insert of the injection mold.

The injection mold having the preferred mold portions described in the two can be used to project the binoculars from a plastic material in a simple and very efficient manner, and the eyepieces are immediately available for use or at the end of the injection molding process. Immediately available for a surface coating step for selective addition. These binoculars have two monoculars, and in each case the local area of the dimocular has a different optical function or function, and has a respective eyepiece transition region between the local regions of the dimocular, and There is no need to process or shape the final processing steps after the injection molding process. In this regard, the device according to the invention essentially has comparable characteristics, advantages and preferred construction as the manufacturing method according to the invention described above.

An advantageous configuration causes the cavity of the injection mold to be configured. After injection molding, according to DIN EN 166, if the binocular lens is to be used for stent safety glasses, the injection molded binocular lens will have at least one A bombardment strength of 45 m/s, or if the binocular system is intended for full-field safety glasses with a headband, will have a booming strength of at least 120 m/s. In particular, the cavity has an average range of from about 1 mm to about 3 mm in the thickness direction of the binocular to be made. This thickness value is particularly suitable for this normal viewing or see-through area. The viewing or see-through area is an area of the binocular to be made, and the wearer's line of sight will normally fall through it. This provides the high mechanical eyepiece strength required for safety glasses to ensure that the eye has a satisfactory protection against the penetration of foreign objects.

According to another advantageous configuration, the inner mold portion of the eyepiece or the outer mold portion of the eyepiece has a first partial region of the mold corresponding to the first eyepiece local region of the injection molded binocular, and the second partial region of the second mold corresponds to And a partial region of the second eyepiece of the injection molded binocular, and having a partial transition region of the mold, etc., in each case, extending between one of the first mode partial regions and one of the second mode partial regions and corresponding thereto The geometric parameters of the first mode partial region, the second mode partial region, and the mode partial transition region are different from each other in the eyepiece transition regions of the injection molded binoculars. The configuration of the manufacturing apparatus can be simplified because the optically different regions are provided on the binocular to be made, that is, the two-mode partial region and the mold partial transition region are especially provided only in one mold portion. Preferably, it is on the inner mold portion of the eyepiece. The other mold portion, preferably the outer mold portion of the eyepiece, is preferably configured to be used as a simple safety eyeglass lens without a special The optical correction function is fixed, and in particular, there is no zooming effect. However, in theory it is also possible to provide these different regions on the inner mould part of the eyepiece or on the outer mould part of the eyepiece.

According to a further advantageous embodiment, the first partial region of the mold is in each case arranged above the partial region of the second mold. Here, the direction "above" should be understood to be based on or along the longitudinal axis of the wearer's body. The first mode partial region, which may cause a first eyepiece local region in the binocular to be manufactured, preferably without an optical correction function or only a low optical correction function, is positioned in the second mode local region Above, it would cause a second eyepiece local area to have a stronger optical correction function in the binocular to be manufactured. This corresponds to a specific specification of anatomy. A weakly corrected partial area of the eyepiece is placed on top for viewing. On the other hand, a locally corrected area of the more well-corrected eyepiece is provided for the near look, for example for reading or the like.

According to a further advantageous configuration, at least one radius of curvature is provided, which varies continuously, in particular when transitioning from the first partial region of the first mould to the partial region of the second mould. Therefore, it is possible to make the transition between the partial regions of the two eyepieces of the binoculars in a particularly smooth and user friendly manner. This transition is almost invisible to the wearer.

According to another advantageous configuration, the main surfaces of the inner mold portion of the eyepiece and the outer mold portion of the eyepiece have an overall thickness of less than 10 nm in at least a partial region, which is intended for use in the binocular to be manufactured. One of the fields of view or the formation of a perspective area. Therefore, it is possible to produce a binocular with a particularly high optical quality, especially for optical grades one.

1‧‧‧ manufacturing equipment

2,24‧‧‧Double eyepieces

3‧‧‧Inside mould

4‧‧‧Outer mold

5,6,7,8‧‧‧Main surface

9‧‧‧First mode local area

10‧‧‧Second mode local area

11‧‧‧Mold local transition zone

12‧‧‧Connecting webs

13,14,25,26‧‧‧Monoscopic

15‧‧‧Local area of the first eyepiece

16‧‧‧Second eyepiece local area

17‧‧‧ eyepiece transition zone

18‧‧‧Vertical direction

19‧‧‧ horizontal direction

20, 21‧‧ ‧ local area

22,23‧‧‧Local area of eyepiece

27‧‧‧ inner surface

28‧‧‧Central plane

29,30‧‧‧ eyes

D‧‧‧ eyepiece thickness

PD‧‧‧ pupil distance

R1, R2‧‧‧ radius of curvature

Other features, advantages, details, and the like of the present invention are provided in the following description of the embodiments in accordance with the drawings. In the drawings: Figures 1 and 2 are part of a device for injection molding a binocular having a zoom function, and two perspective views of one embodiment of such a binocular 3 is a front plan view of another embodiment of a binocular formed by injection molding of safety glasses having a zoom function; and FIG. 4 is a cross-sectional view of the binoculars taken along line IV-IV of FIG.

The components corresponding to each other have been provided with the same reference numerals in FIGS. 1 to 4. In particular, the details of the embodiments described in more detail below may constitute an invention or may be part of the subject matter of the invention.

Detailed description of the preferred embodiment

1 and 2 are perspective views of an embodiment of a device 1 for producing a safety glass binocular 2 by injection molding. The device 1 is a combinable injection mold or a combinable injection mold tool having only two inserts, an eyepiece inner mold portion 3 and an eyepiece outer mold portion 4, shown in Figs. 1 and 2. In the combined state of the injection molds, the mold portions 3 and 4, which are each divided into two in the illustrated embodiment, will provide their major surfaces 5, 6, 7, 8 to define a cavity, which is illustrated in FIG. And can not be seen in the exploded view of Figure 2. The liquefied plastic material is injected into the cavity to make the binocular lens 2 therefrom. The plastic material can be, for example, a polycarbonate, although in principle other light transmissive, especially high refractive plastic materials can be used. The binoculars 2 that have been made can be selected The ground has a color and/or a light color effect.

The major surfaces 5 and 6 of the inner mold portion 3 of the eyepiece are convexly curved. In the illustrated embodiment, without limitation, in general, the eyepiece inner mold portion 3 is attached to one of the ejector sides of the device 1, i.e., on the side of an ejector, which is not shown in Figure 1 and Figure 2. The major surfaces 7 and 8 of the outer mold portion 4 of the eyepiece are concavely curved. In the illustrated embodiment, and without limitation, in general, the eyepiece outer mold portion 4 is disposed on one of the nozzle sides of the device 1, that is, on the side of a nozzle, which is also not shown in FIGS. 1 and 2. Medium for injecting the liquefied plastic material.

The major surfaces 5 and 6 of the inner mold portion 3 of the eyepiece are free-form surfaces. In mathematical terms, a free-form surface is a surface that is shaped differently than a spherical shape. The major surfaces 5 and 6 each comprise a plurality of partial regions, which will be described in more detail below by way of example with respect to the major surface 5 with reference to FIG. The major surface 6 is similarly constructed. The main surface 5 has at least a first mold partial region 9, a second mold partial region 10, and a partial partial transition region 11 disposed between the first and second mold partial regions 10. The regions 9 to 11 differ from each other at least in one of their geometrical parameters, such as their curvature. Also, for example, a radius of curvature R1 will continuously change within the local transition region 11 of the mold. The regions 9 to 11 create corresponding partial regions in the binoculars 2 that have been produced, each having a different optical effect.

Therefore, after injection molding, the binoculars 2 have two monocular mirrors 13 and 14, which are joined together by a central connecting web 12 into a piece, and each having a first eyepiece partial region 15 has a first Optically functioning or functioning, a second eyepiece local region 16 has a second optical effect or function different from the first one, and an eyepiece transition region 17 is attached to the first Between the first and second eyepiece local regions 15, 16 and having a continuous transition from the first action or function to the second action or function. When the injection molding process is performed, the first eyepiece partial region 15 is substantially formed by the first mode partial region 9, and the second eyepiece partial region 16 is substantially formed by the second mode partial region 10, and the eyepiece The transition region 17 is substantially formed by the mold partial transition region 11. Here, the first eyepiece partial region 15 can be configured to be optically neutral, i.e., without a corrective function, or can be corrective with a low correction value of, for example, up to +1 dpt. In contrast, the second eyepiece local region 16 has a relatively high correction effect, and has a correction value between, for example, +0.75 dpt and +3 dpt. In the intermediate eyepiece transition region 17, the optical effect is continuously changed by the correction value of the first eyepiece local region 15 to the correction value of the second eyepiece local region 16. Therefore, the monoculars 13, 14 each have a zooming function.

Visible in the vertical direction 18, the first mode partial region 9 is located above the second mode partial region 10. The same applies to the first and second eyepiece partial regions 15, 16 of the binoculars 2 made by the device 1. In the horizontal direction 19 perpendicular thereto, the second mold partial region 10 immediately below and the both sides of the mold partial transition region 11 are additional mold partial regions 20 and 21, which correspond to the already made The additional eyepiece partial regions 22 and 23 of the monocular mirrors 13, 14 of the binoculars 2 have an undefined optical characteristic. The "vertical" and "horizontal" directions are here in relation to a standard position of use in which the safety glasses fitted with the binoculars 2 are worn by a standing person. The respective shapes of the mold partial regions 9, 10, 11, 20, 21 and the eyepiece partial regions 15, 16, 17, 22, 23, etc., which are included in the embodiment of Figs. 1 and 2, are one. For example. Other configurations of these partial regions are also possible.

With respect to the inner mold portion 3 of the eyepiece, the major surfaces 7 and 8 of the outer mold portion 4 of the eyepiece do not have a comparable partial region of the mold that is specifically incorporated to form a partial region of the eyepiece having a different optical effect. Alternatively, the major surfaces 7, 8 are configured to form an overall uniform optical effect, such as an optical neutrality, i.e., no corrective action in the binocular. In the illustrated embodiment, the two major surfaces 7 and 8 are each configured as a spherical surface. In each case, the optical effects of the individual eyepieces in the individual eyepieces of the binoculars 2 made by the device 1 are different, in that they are configured to provide a spherical outer surface of the outer mold portion 4 having a spherical surface. This is caused by cooperation with the inner mold portion 3 of the eyepiece that is configured to have a free-form surface for a zooming action. Therefore, the binoculars 2 made of the device 2 will have the desired zoom function. They can also be called a glance eyepiece.

The major surfaces 5 to 8 of the two mold portions 3, 4, like the monocular mirrors 13, 14 of the binoculars 2 that have been produced, have a continuous surface path without any discontinuities at least in the actual field of view. And/or abrupt transition areas, etc., which are particularly visible to the naked eye. The imaginary line shown in all four figures is only used to indicate the shape and position of each partial area. However, they are not intended to be used to represent any detectable individual transition regions, lines or edges. Further, the major surfaces 5 to 8 and the like of the two mold portions 3, 4 have a thickness value in each case, which is less than 10 nm as a whole.

The manufacture of the second insert part of the eyepiece inner mould part 3, which is used in particular for the zooming action of the binocular 2, comprises the following substeps: a) providing the insert material, for example a steel material, b) pre-milling, c) finishing of the main surfaces 5, 6, d) extreme precision machining of the main surfaces 5, 6 (eg turning, milling, polishing, etc.).

The mould parts 3, 4 are in particular replaceable parts of the device 1. This is preferably applied to the inner mold portion 3 of the eyepiece, which determines the optical correcting action of the binocular 2. A plurality of a plurality of eyepiece inner mouldings 3 can be provided, each of which is configured to have a corrective action which in each case will be different in particular in the second eyepiece partial region 16 for the manufacture of the binoculars 2. To this end, the corrective action in the second eyepiece local region 16 is particularly used to compensate for the age-related hyperopia of the wearer. It will improve the visual acuity of a wearer who is far-sighted by age at a distance of between 30 cm and especially 100 cm, preferably even 400 cm. For example, a set comprising three eyepiece inner molds 3 would be provided for making a binocular 2 having a correction value of +1 dpt, +2 dpt and +3 dpt in the second eyepiece local area 16. Other predetermined curvature values and/or a different number of reserves and interchangeable eyepiece inner mould parts 3 are also possible. Likewise, the different eyepiece inner mould parts 3 can also be at least partially configured to produce a binocular 2 having a different corrective action in the first eyepiece partial region 15. All of the different eyepiece inner mold portions 3 that are constructed differently for the achievable corrective action preferably have a uniform shape so that they can be embedded in a tight fit and misaligned manner. In a device 1 that is shot out of the mold.

The binoculars 2 made by the device 1 are intended to be used for occupational safety purposes. The safety glasses made by the binoculars 2 have not only been previously A favorable zoom function is mentioned. They also effectively protect the wearer's eyes against the penetration of foreign objects. Therefore, the binoculars 2 which are formed by the device 1 will also meet the requirements described in the DIN EN 166 standard for personal eye protection. In particular, if the binoculars 2 are to be used for stent safety glasses, they will withstand a standard conformal bombardment of a steel ball having a diameter of 6 mm, a minimum mass of 0.86 g, and a speed of 45 m/s (F), or The double mirror 2 is intended to be used for a full field of view safety glasses with a headband of 120 m/s (B).

3 and 4 illustrate another embodiment of a binocular 24 for safety glasses that is injection molded from a plastic material. The binoculars 24 also have two monocular mirrors 25 and 26 that are joined together into a single piece and are made in an injection mold similar to the apparatus 1 of Figures 1 and 2.

The configuration of the binoculars 24 substantially corresponds to the configuration of the binoculars 2 of FIGS. 1 and 2. The binoculars 24 also have a zooming function, which is produced exclusively by injection molding, and in particular has substantially the same eyepiece partial regions 15, 16, 17, 22 and 23, etc., such as the binoculars 2 For example, at least one geometric parameter is different. For this, please also refer to the description of the embodiment of FIGS. 1 and 2.

The inner surface 27 of the eyepieces of the monocular mirrors 25, 26 has a gradual curvature, in particular a different radius of curvature. In Fig. 4, a radius of curvature R2 of one of the eyepiece transition regions 17 is also shown. As with the radius of curvature R1 of the inner mold portion 3 of the eyepiece described in relation to the device 1, the radius of curvature R2 is continuously changed within the eyepiece transition region 17.

Again, like the binoculars 2, the binoculars 24 having the two monoculars 25, 26 are also mirror symmetrical with respect to a central plane 28. When wearing When the user wears the safety glasses, the longitudinal axis of the wearer's body is most preferably located within the central plane 28 or it may extend parallel to the central plane 28. Figure 4 also shows schematically a wearer's eyes 29, 30 which are separated by a pupil distance PD. Each of the two monocular lenses 25, 26 is associated with one eye 29, 30, respectively. The first eyepiece partial regions 15 are located within the binoculars 24 such that when the wearer looks straight ahead, i.e., looks far away, it will look through the first eyepiece local regions 15. However, if it gaze at some close object and look down, the wearer will see through the second eyepiece local area 16. Thus, along the longitudinal axis of the wearer's body, the first eyepiece partial regions 15 are positioned atop and the second eyepiece local regions 16 are positioned underneath.

The cross-sectional view shown in Figure 4 also shows an eyepiece thickness d of a binocular eye 24. The average eyepiece thickness d of the entire monocular 25, 26 is large enough to ensure the mechanical strength required for the safety glasses, for example according to the DIN EN 166 standard. In the illustrated embodiment, the monocular mirrors 25, 26, in particular including the eyepiece local regions 15, are spaced apart from one another by an average eyepiece thickness d in the field of view of the pupil distance PD of from about 1 mm to about 3 mm.

In summary, the apparatus 1 for manufacturing the binoculars 2 or 24 for safety glasses and the method of using the apparatus are characterized in that the zoom function has been immediately incorporated at the time of injection molding, instead of borrowing an injection molded eyepiece. The final processing steps of mechanical forming and/or material processing of the material. This will significantly simplify and shorten the process.

1‧‧‧ manufacturing equipment

2‧‧‧ binoculars

3‧‧‧Inside mould

4‧‧‧Outer mold

5,6,7,8‧‧‧Main surface

9‧‧‧First mode local area

10‧‧‧Second mode local area

11‧‧‧Mold local transition zone

12‧‧‧Connecting webs

13,14‧‧‧Monoscopic

15‧‧‧Local area of the first eyepiece

16‧‧‧Second eyepiece local area

17‧‧‧ eyepiece transition zone

18‧‧‧Vertical direction

19‧‧‧ horizontal direction

20, 21‧‧ ‧ local area

22,23‧‧‧Local area of eyepiece

R1‧‧‧ radius of curvature

Claims (14)

A method for manufacturing a binocular for safety glasses, wherein: a) the binocular comprises two monocular lenses joined together, which are formed from a plastic material and formed into a piece, and are immediately available for use and immediately a form available for one of the optional surface coating steps; b) a first eyepiece local region having a first optical function and a second eyepiece local region having a second optical portion during the injection molding process The function is different from the first optical function, and an eyepiece transition region is interposed between the first and second eyepiece local regions and has a continuity transition from the first optical function to the second optical function. Included in each of the monoculars, each of which is associated with a respective eye of one of the persons wearing the lens; and c) in the injection molding process, according to DIN EN 166, if the binocular system is intended For stent safety glasses, the binoculars will have a bombardment intensity of at least 45 m/s, or if the binoculars are intended for full-field safety glasses with a headband, there is a bombardment strength of at least 120 m/s. The method of claim 1 is characterized in that, in the case of the injection molding process, the binoculars in each case are provided with an integrally formed side protective cover in the side edge regions. The method of claim 1, wherein the second eyepiece local area is configured to improve the visual acuity of the wearer over a distance of between 30 cm and 400 cm. The method of claim 1, wherein the method is: when the shot is In the type of procedure, one of the optical corrections of the local area of the second eyepiece is set to a defined correction value which is selected from a limited number of predetermined correction values prior to the injection molding procedure. The method of claim 4, characterized in that three different correction values are provided in the range of +0.75 dpt to +3 dpt. The method of claim 1, characterized in that, when the injection molding process is performed, an optical neutral effect having a correction value of 0 dpt and an optical having an optical quality of 1 and a correction value of less than 1 dpt One of the corrective actions will be placed in the local area of the first eyepiece. The method of claim 1, characterized in that, when the injection molding process is performed, the monocular mirrors are provided with at least one radius of curvature that will transition from a local region of the first eyepiece to a local region of the second eyepiece. Time changes continuously. The method of claim 7, characterized in that the variable radius of curvature is provided on one of the inner surfaces of the monoculars. An apparatus for manufacturing a binocular for safety glasses, comprising: a) a combinable injection mold having an inner mold portion of the eyepiece and an outer mold portion of an eyepiece, which when combined, form a cavity, and the liquefied plastic material can Injecting therein to form the binocular, comprising two monocular lenses joined together into one piece, which becomes one of the surface coating steps available immediately or immediately available for an optional addition; wherein b) the injection mold The hole system is configured to form a first eyepiece local region in the monocular associated with each of the wearer's respective eyes when injection molding has a first optical function, and a second eyepiece The partial region has a second optical function different from the first optical function, and an eyepiece transition region is interposed between the first and second eyepiece local regions, having a first optical function to the second optical function Continuity transition; and c) when combined, the inner mold portion of the eyepiece and the outer mold portion of the eyepiece are defined in the region of the monocular to be made, with a major surface having a continuous surface path as a whole The cavity. The device of claim 9, characterized in that the hole of the injection mold is constructed, and at the end of the injection molding process, the injection molded binocular is intended for use in a bracket according to DIN EN 166. The safety glasses have a bombardment strength of at least 45 m/s, or a bombardment strength of at least 120 m/s if the binoculars are intended for full-field safety glasses with a headband. The device of claim 9 is characterized in that: the inner mold portion of the eyepiece and one of the outer mold portions of the eyepiece have a first partial region of the first mold corresponding to a partial area of the first eyepiece of the injection molded binocular, and a partial area of the second mold corresponding to the second area of the second eyepiece of the injection molded binocular, and having a partial transition region of the mold extending in each case between a partial area of the first mold and a partial area of the second mold, And corresponding to the eyepiece transition region of the injection molded binocular, wherein geometric parameters of the first mode partial region, the second mode partial region, and the mode partial transition region are different from each other. The device of claim 11, characterized in that the first partial region of the mould is in each case situated above the partial region of the second mould. A device according to claim 11, characterized in that at least one radius of curvature is provided which continuously changes when transitioning from the first partial region to the second partial region. The device of claim 9, characterized in that the inner surface of the eyepiece and the outer surface of the outer mold portion of the eyepiece have at least one local area to be used for forming a field of view in the binocular to be made. A thickness value of less than 10 nm overall.