Binocular and focusing device

A binocular comprising:

• a first tube and a second tube, connected to one another by means of a hinged bridge pivotable about a hinge axis for adjusting an interpupillary distance and for parallel arrangement of the first and second tubes, wherein the first tube and the second tube each include:
• an objective lens;
• an eyepiece;
• a prism erecting system;
• and
• a focusing lens, wherein the focusing lens is axially displaceable,
• wherein the focusing lens of the first tube is positioned between the objective lens of the first tube and the prism erecting system of the first tube;
• wherein the focusing lens of the second tube is positioned between the objective lens of the second tube and the prism erecting system of the second tube;
• a focusing knob rotatable about a rotational axis;
• and
• a first push rod and a second push rod, each of the first and the second push rods having a longitudinal axis along which the respective push rod can travel, wherein the focusing knob is coupled to each of the first and second push rods, the first push rod is coupled to the focusing lens within the first tube, and the second push rod is coupled to the focusing lens within the second tube,
• wherein a direction of a back-and-forth displacement in the longitudinal axis of the first push rod or along the longitudinal axis of the second push rod and a direction of the hinge axis are aligned obliquely with respect to each other,
• wherein an objective-side end of the first push rod and of the second push rod is formed having a joint head arrangement, the joint head arrangement being engaged with a joint socket of a lens mount of the corresponding focusing lens,
• wherein an outer side of each tube comprises a waist formed with a circumferential shape deviating from a circular shape in a region of the prism erecting system, wherein a section extending on an upper side of the tube is formed as a retaining recess following the waist for a section of a finger and a section extending on a bottom side of the tube is formed as a retaining recess following the waist for a section of a thumb of a user,
• wherein each tube in the region of its waist has two retaining recesses which are opposing each other,
• wherein in the two tubes, in each case, a beam path is formed with a first optical axis of the objective lens, with a second optical axis of the eyepiece and with a prism erecting system, the first optical axis of the objective lens and the second optical axis of the eyepiece being offset parallel to each other by a distance so that these axes do not coincide,
• wherein the hinge axis of the hinged bridge, the first optical axis of the objective lens and the second optical axis of the eyepiece lie in a common, first plane, and
• wherein an outline of each tube defined by a cross-section normal to the first plane and to the direction of the optical axis through each of the tubes in the region of the waist has its narrowest part in an intersection area of the respective tube with a plane containing the second optical axis of the eyepiece and being perpendicular to the first plane, wherein a ratio of a diameter of the narrowest part of the tube normal to the first plane to a diameter of the housing in the area of the objective lens has a value of below 80%.

A binocular comprising:

• a first tube and a second tube, connected to one another by means of a hinged bridge pivotable about a hinge axis for adjusting an interpupillary distance and for parallel arrangement of the first and second tubes, wherein the first tube and the second tube each include:
• an objective lens;
• an eyepiece;
• a prism erecting system;
• and
• a focusing lens, wherein the focusing lens is axially displaceable,
• wherein the focusing lens of the first tube is positioned between the objective lens of the first tube and the prism erecting system of the first tube;
• wherein the focusing lens of the second tube is positioned between the objective lens of the second tube and the prism erecting system of the second tube;
• a focusing knob rotatable about a rotational axis;
• and
• a first push rod and a second push rod, each of the first and the second push rods having a longitudinal axis along which the respective push rod can travel, wherein the focusing knob is coupled to each of the first and second push rods, the first push rod is coupled to the focusing lens within the first tube, and the second push rod is coupled to the focusing lens within the second tube,
• wherein a direction of a back-and-forth displacement in the longitudinal axis of the first push rod or along the longitudinal axis of the second push rod and a direction of the hinge axis are aligned obliquely with respect to each other,
• wherein an objective-side end of the first push rod and of the second push rod is formed having a joint head arrangement, the joint head arrangement being is engaged with a joint socket of a lens mount of the corresponding focusing lens, and
• wherein the push rod is held in a guide tunnel of a tube housing so as to be displaceable in the direction of its longitudinal axis.

A binocular comprising:

• a first tube and a second tube, connected to one another by means of a hinged bridge pivotable about a hinge axis for adjusting an interpupillary distance and for parallel arrangement of the first and second tubes, wherein the first tube and the second tube each include:
• an objective lens;
• an eyepiece;
• a prism erecting system;
• and
• a focusing lens, wherein the focusing lens is axially displaceable,
• wherein the focusing lens of the first tube is positioned between the objective lens of the first tube and the prism erecting system of the first tube;
• wherein the focusing lens of the second tube is positioned between the objective lens of the second tube and the prism erecting system of the second tube;
• a focusing knob rotatable about a rotational axis;
• and
• a first push rod and a second push rod, each of the first and the second push rods having a longitudinal axis along which the respective push rod can travel,
• wherein the focusing knob is coupled to each of the first and second push rods, the first push rod is coupled to the focusing lens within the first tube, and the second push rod is coupled to the focusing lens within the second tube,
• wherein a direction of a back-and-forth displacement in the longitudinal axis of the first push rod or along the longitudinal axis of the second push rod and a direction of the hinge axis are aligned obliquely with respect to each other,
• wherein an objective-side end of the first push rod and of the second push rod is formed having a joint head arrangement, the joint head arrangement being engaged with a joint socket of a lens mount of the corresponding focusing lens, and
• wherein the push rods are designed so as to be adjustable in their length in a telescope-like manner.