JP5555513B2 - Convergence correction mechanism for close-up scene observation with binoculars - Google Patents

Description

  The present invention relates to binoculars, and more particularly to a convergence correction mechanism for observing a close-up scene.

  In recent years, there has been a demand for observing details of various exhibits in exhibitions and details such as flower florets of plants, but it has been difficult to meet this demand with ordinary binoculars. In other words, since ordinary binoculars are used for observing distant scenes, it is basically based on observing scenes that are several tens of meters away from infinity. Although they match and are visually recognized as one image, when observing a close object within 1 or 2 meters, the observation object is visually recognized as a double image that does not match with the left and right eyes separated from each other. Because.

  This phenomenon occurs because the optical axes of the left and right objective lenses of the binoculars are always fixed in parallel to accommodate distant scenes, and when observing near scenes, the distance to the observation object Therefore, the amount of extension of the objective lens that is extended forward (in the direction of the observation object) needs to be several times that in the case of a distant object, and therefore the adjustment value (distance to the in-focus object) for the observation object and This is because the convergence value (the distance at which the left and right lines of sight intersect) is significantly different. This difference becomes more prominent with high-magnification binoculars. For example, in binoculars with a magnification of 10 times, the difference reaches 10 times that of the naked eye, and an object to be observed 1 meter ahead is the same as viewing an object 10 centimeters ahead with the naked eye. Such observation is practically impossible.

  In order to improve this, it is sufficient to correct the convergence value so as to match the adjustment value. Conventionally, in order to perform this convergence correction, a mechanism for moving the left and right objective lenses so as to approach each other in a direction orthogonal to the optical axis when observing a close object scene has been proposed. And there are roughly two types of mechanisms conventionally proposed.

  The first method is guided by a guide shaft extending parallel to the optical axis linked to the upper side of the objective lens frame and a guide groove inclined at a predetermined angle with respect to the optical axis linked to the lower side of the objective lens frame, A system in which the objective lens frame moves in the direction of the optical axis, and the objective lens frame rotates while being guided by the guide grooves in the contact and separation directions of each other while rotating about the guide shaft. (Patent Documents 1 and 2).

  In the second method, the objective lens frame is connected to a guide bar inclined at a predetermined angle with respect to the upper optical axis and an auxiliary bar inclined at a predetermined angle with respect to the lower optical axis. The objective lens frame is linked to the focus shaft so as to be interlocked only in the optical axis direction, and the objective lens frame is guided by the guide rod and the auxiliary rod according to the operation of the focus axis, and the optical axis direction and the mutual contact are established. A structure that moves in a separating direction (Patent Document 3), an objective lens frame that is disposed in an objective lens cylinder housed in a lens barrel, a guide hole that is provided in the objective lens cylinder and extends in a direction perpendicular to the optical axis direction, and a mirror The pins of the objective lens frame are inserted into guide holes that are inclined at a predetermined angle with respect to the optical axis provided in the cylinder, while the objective lens frame is connected to the focus axis so as to be linked only in the optical axis direction. Depending on the operation, the objective lens frame can be And de, configured to move in the optical axis direction and mutual contact and separation direction (Patent Document 3).

Japanese Patent No. 4206046 Japanese Patent No. 4157480 Japanese Patent No. 3196613

  However, according to the first method, when the objective lens frame moves in the direction of contact and separation, the optical difficulty is that the optical axis is shifted up and down by rotating around the upper guide shaft. There is. In addition, since guide members are disposed above and below the objective lens frame, the structure becomes complicated, which is disadvantageous in terms of volume in downsizing the product.

  Further, according to the second method, the configuration using the guide rod and the auxiliary rod increases the number of components arranged in the lens barrel and the structure is complicated, whereas the configuration using the guide hole has an objective lens frame and an objective lens. There is an inconvenience that the triple structure of the tube and the lens barrel is complicated and large. Further, in the second method, the structure of the guide mechanism and the drive mechanism for moving the objective lens frame are separately configured independently of each other, and the focus axis and the objective lens frame as the drive mechanism are linked only in the optical axis direction. However, since the objective lens frame is in a free state in the rotation direction, there is a disadvantage that the rotation accompanying the movement of the objective lens frame cannot be completely prevented.

  The present invention improves the configuration using the guide holes of the second method described above, eliminates the above-mentioned inconveniences, enables reliable convergence correction with a simple configuration, and realizes the observation of close-up scenes of binoculars An object of the present invention is to provide a congestion correction mechanism.

In order to achieve the above object, the binoculars of the present invention includes a near-field observation convergence correction mechanism including a planar substrate provided with a pair of guide holes, and a pair of left and right objective lenses guided and moved by the pair of guide holes. A congestion correction mechanism for close-up scene observation in binoculars comprising a frame, a drive body that moves each objective lens frame in the optical axis direction, and an operation member provided on the same surface side of the drive body and the flat substrate The pair of guide holes have inclined portions whose intervals gradually narrow toward one end side so that the objective lens frames are guided toward each other as the objective lens frames are moved to the close object scene side. and, wherein each objective lens frame, the displaceably interlocking the optical axis direction perpendicular to the drive member, in which the driver has no to advance and retreat in by Ri the optical axis direction to said operating member .

  Similarly, in order to achieve the above object, as a more specific second configuration of the present invention, in the first configuration, a connection member is provided for each objective lens frame, and this is provided on the planar substrate from above and below. The drive body is supported by a coupling member engaged with the guide hole so as to be sandwiched, and the drive body is a plate-like shape that extends in parallel with the planar substrate, and a pair of left and right arm portions formed at one end thereof. The projecting shaft provided at the substantially central portion engages with the cam groove provided on the lower surface of the rotating body as the operating member, and is connected to the connecting member of each objective lens frame according to the rotation direction of the rotating body. It moves forward and backward in the optical axis direction.

  According to the first configuration of the present invention, since the objective lens frame moves while being guided by the guide hole formed in the flat substrate, the optical axis shifts by rotating as a horizontal movement along the same plane. In addition, since the configuration is simple and the driving body and the operation member are arranged on the same surface side of the flat substrate, there is an effect that downsizing is possible.

  According to the second configuration of the present invention, in addition to the above-described effects, there is an effect that the assembly is simple and the operation is more reliable because the plate-like driving body is used.

The perspective view which shows the whole structure in one Embodiment of this invention. The perspective view which shows the connection state of a plane board | substrate, a drive body, and an objective lens frame. The front view of an objective-lens frame. The perspective view which shows the back surface side of a rotary dial.

  First, a preferred embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the flat substrate 1 fixed to the binocular casing (not shown) has a pair of guide holes 4 and 5 for guiding the movement of the pair of right and left objective lens frames 2 and 3, respectively. Are provided symmetrically with respect to the center line in the left-right direction.

  The guide holes 4 and 5 are formed in rectangular insertion portions 4d and 5d for inserting connecting members 6 and 7 provided on the upper side of the objective lens frames 2 and 3 from below, and straight from the insertion portions 4d and 5d. And straight ends 4a and 5a extending in parallel to each other, inclined portions 4b and 5b extending so as to incline toward each other, and terminations extending straight and parallel to each other following these inclined portions 4b and 5b It consists of straight parts 4c and 5c. The starting straight portions 4a and 5a are portions where the objective lens frames 2 and 3 are positioned when observing a distant scene, and the inclined portions 4b and 5b are each objective lens frames 2 and 3 when observing a close-up scene. The end straight portions 4c and 5c are portions where the objective lens frames 2 and 3 are positioned when observing the closest object scene. That is, the guide holes 4 and 5 are formed so that the distance between the objective lens frames 2 and 3 is gradually narrowed toward the one end side so that the objective lens frames 2 and 3 are guided toward each other as they move toward the close object scene side. Has been.

  Next, the pair of left and right objective lens frames 2 and 3 will be described. Since these are the same size, the same shape, and symmetrically provided, only the objective lens frame 2 will be described in detail, and the objective lens frame 3 will be described. Will be used to explain the reference numerals attached to the members. As can be understood from FIG. 3, the connecting member 6 provided on the upper side of the objective lens frame 2 includes a base portion 6 a that is integrally fixed to the objective lens frame 2 and a support shaft 6 b that is fitted and engaged with the guide hole 4. And a connecting plate 6d having a connecting recess 6c. The connecting member 6 is inserted from below the insertion portion 4d of the guide hole 4 and moved in the direction of the starting end straight portion 4a so that the flat substrate 1 is sandwiched from above and below by the base portion 6a and the connecting plate 6d. Therefore, it is positioned corresponding to the guide hole 4. As a result, the objective lens frame 2 is supported by the planar substrate 1 via the connecting member 6 engaged with the guide hole 4.

  1 and 2, reference numeral 7 denotes a connecting member for the objective lens frame 3, 7 c denotes a connecting recess, and 7 d denotes a connecting plate. The objective lens frame 3 is also guided to the flat substrate 1 in the same manner as the objective lens frame 2. It is in a state of being supported through the connecting member 7 engaged with the hole 5.

  As shown in FIG. 2, on the surface of the flat substrate 1 on the side of the connecting plates 6d and 7d, a receiving shaft 9 having a steady pin 8 and a pedestal 9a is provided on the center line in the left-right direction. The drive body guide pieces 10 and 11 are erected at symmetrical positions. The upper surface of the pedestal 9a is at the same height as the surfaces of the connecting recesses 6c and 7c of the connecting plates 6d and 7d. Further, on the same surface side of the flat substrate 1, rotary dial support pieces 12, 13, 14, and 15 are erected.

  Similarly, as shown in FIG. 2, the flat and substantially T-shaped driving body 16 includes a first guide hole 16a, a second guide hole 16b, a driving pin 16c, and a pair of left and right driving arms 16d and 16e. ing. In the driving body 16, the first guide hole 16 a is engaged with the steady pin 8, the second guide hole 16 b is engaged with the receiving shaft 9, and both side edges of the rear part are the driving body guide pieces 10. , 11 and is placed on the pedestal 9a. For this reason, the driving body 16 can move linearly without shaking from side to side.

  The drive arms 16d and 16e of the drive body 16 are slidably fitted in the connection recesses 6c of the connection plates 6d and 7d, respectively. The connection plates 6d and 7d are connected to the drive plates 16d and 7d. Guided by the arms 16d and 16e, they can move in the direction of mutual contact. Since the upper surface of the pedestal 9a and the connecting recesses 6c and 7c of the connecting plates 6d and 7d are at the same height, the driving body 16 is positioned parallel to the flat substrate 1 and always on the same plane. Will move.

  As shown in FIG. 1, a rotating dial 17, which is a disc-shaped focus adjusting dial as an operation member, is rotatably supported by the receiving shaft 9 of the flat substrate 1 through a central shaft hole 17 a (see FIG. 4). The periphery of the lower surface of the rotary dial 17 is supported by rotary dial support pieces 12, 13, 14, and 15. On the surface of the rotary dial 17, a knurled finger hook 17b is formed along the circumference. On the other hand, as shown in FIG. 4, a cam groove 17c is formed on the back surface of the rotary dial 17, and the drive pin 16c of the drive body 16 is engaged with the cam groove 17c.

  Subsequently, the congestion correction operation of the above-described embodiment will be described. When the rotary dial 17 shown in FIG. 1 is rotated in a predetermined direction, the drive body 16 linearly advances and retreats in the optical axis direction according to the displacement of the drive pin 16c fitted in the cam groove 17c. As a result, the objective lens frames 2 and 3 connected to the drive arms 16d and 16e of the drive body 16 are also moved in the same direction while being guided by the guide holes 4 and 5, and the focus adjustment operation is performed. In this focus adjustment operation, when the objective lens frames 2 and 3 are moved forward along with the driving body 16 so as to focus on the close object scene, the respective support shafts 6b are inclined portions 4b and 5b of the guide holes 4 and 5, respectively. Since the connecting members 6 and 7 are displaced in parallel with each other in the direction of approach to each other corresponding to the straight end portions 4c and 5c, the objective lens frames 2 and 3 are also displaced in the same direction and the optical axis is deviated. There is no congestion correction.

  Note that the present invention is not limited to the above-described embodiments, and for example, the arrangement surface of each component with respect to the flat substrate 1 may be on the side opposite to the above.

DESCRIPTION OF SYMBOLS 1 Planar substrate 2, 3 Objective lens frame 4, 5 Guide hole 4a, 5a Start end straight part 4b, 5b Inclined part 4c, 5c End straight part 6, 7 Connection member 6a Base part 6b Support shaft 6c, 7c Connection recessed part 6d, 7d Connecting plate 8 Stabilizing pin 9 Bearing shaft 9a Pedestal 10, 11 Driver guide pieces 12, 13, 14, 15 Rotating dial support piece 16 Driver 16a First guide hole 16b Second guide hole 16c Drive pins 16d, 16e Drive Arm 17 Rotating dial 17a Shaft hole 17b Finger hook 17c Cam groove

Claims (2)

A planar substrate provided with a pair of guide holes; a pair of left and right objective lens frames that move while being guided by the pair of guide holes ; a driver that moves each objective lens frame in the optical axis direction; and the driver; A convergence correction mechanism for observing a close-up scene in binoculars provided with an operation member provided on the same surface side of the flat substrate , wherein the pair of guide holes are moved to the close-up scene side. Accordingly, the objective lens frame has an inclined portion that gradually narrows toward each other toward the one end side so as to guide in the approaching direction of each other, and each objective lens frame can be displaced in a direction perpendicular to the optical axis in the driving body. A congestion correction mechanism for observing a close-up scene in binoculars , wherein the driving body is connected and moved forward and backward in the optical axis direction by the operation member .   Each objective lens frame is provided with a connecting member, and each objective lens frame is supported via the connecting member engaged with a guide hole so as to sandwich the objective lens frame, and the driving body is The whole is a plate extending in parallel with the flat substrate, and is connected to the connecting member of each objective lens frame by a pair of left and right arm portions formed at one end thereof, and the protruding shaft provided at the substantially central portion is operated. The congestion for near-field scene observation in the binoculars according to claim 1, characterized in that it engages with a cam groove provided on the lower surface of the rotating body as a member, and advances and retreats in the optical axis direction according to the rotating direction of the rotating body. Correction mechanism.

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