JPH0786587B2 - Element position adjustment mechanism for range finder - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a viewfinder of a camera provided with a distance measuring device.

[Conventional technology]

Conventionally, a finder having a distance measuring device including a light emitting element and a light receiving element is known. In order to perform accurate distance measurement, the light emitting element and the light receiving element must be arranged in a predetermined positional relationship with the taking lens provided in the camera body on the baseline connecting the light emitting element and the light receiving element. Therefore, first, the position between the light emitting element and the light receiving element is adjusted in the finder block adjusting step, and the final inspection is performed with the finder attached to the camera body. Here, if the positional relationship between the light emitting element and the light receiving element and the taking lens is not within the predetermined allowable range, the viewfinder is disassembled from the camera body and the position of the element is adjusted again. The position of the light emitting element and the light receiving element cannot be adjusted with the finder incorporated in the camera body because the driver used for position adjustment interferes with the circuit board or the like provided in the camera body.

[Problems to be Solved by the Invention]

However, as a result of the final inspection with the finder assembled in the camera body in this way, the structure is such that the finder is removed from the camera body again and the position adjustment between each element is performed again. Therefore, there is a problem that the efficiency of the adjustment work is low and the adjustment work is complicated.

The present invention has been made for the purpose of solving such a problem, so that the position adjustment of the light emitting element and the light receiving element with respect to the taking lens can be performed with the finder incorporated in the camera body. The position adjusting mechanism is provided.

[Means for solving problems]

In the element position adjusting mechanism according to the present invention, a supporting member, to which a movable element of a light emitting element and a light receiving element is attached, is provided with a flange substantially parallel to the outer surface of the camera body in the vicinity of the supporting member, and the flange is provided. It is characterized in that an engaging portion capable of engaging with the adjusting instrument is formed on.

[Action]

The adjusting device is erected substantially perpendicular to the outer surface of the camera body and engaged with the engaging portion of the flange. When the adjusting instrument is rotated in this state, the support member and the element move along the base line.

〔Example〕

 The present invention will be described below with reference to illustrated embodiments.

1 to 3 show a first embodiment of the present invention. This embodiment is an example in which the present invention is applied to a finder in which a light emitting element and a light receiving element are provided side by side in the vertical direction of a camera body.

The finder 10 is provided in a camera having a zoom mechanism. First, the schematic configuration of the finder 10 will be described. A variable magnification lens group (not shown) provided in the viewfinder 10 moves in accordance with the zooming operation of the taking lens of the camera, whereby the photographed image of the subject obtained by this taking lens and the subject obtained through the viewfinder 10 The observed image matches. Further, at this time, the macro prism 11 is moved to the front of the variable power lens group as needed, whereby parallax and the like are corrected.

An eyepiece lens group frame 12 and a Porro prism 13 are provided at one end of the finder 10, and a macro prism 11, a light emitting lens 14 and a light receiving lens 15 are provided at the other end of the finder 10. The light emitting lens 14 and the light receiving lens 15 are arranged along the vertical direction of the camera, and the macro prism 11 is provided between them.
Lower slide frame 16 and upper slide frame 17 that slidably support the
Is provided. The macro prism 11 is connected to a macro switch 24 via a drive mechanism including a drive pin 21, a support shaft 22, and a drive lever 23.
By operating 24, it moves along the slide lower frame 16 and the slide upper frame 17.

The first lens group 31 is connected to a first lens frame 32, and the first lens frame 32 is slidably supported by a slide shaft 33. The second lens group (not shown) is connected to the second lens frame 34, and the second lens frame 34 is slidably supported by the slide shaft 35.
Engaging pins 36 and 37 provided on the first lens frame 32 and the second lens frame 34, respectively, are connected to a lens driving mechanism (not shown). The lens driving mechanism operates according to the focal length of the taking lens, and thereby the lens group of the finder is driven according to the zooming operation of the taking lens.

A light emitting element 41 is provided on the back side of the light emitting lens 14, and the light emitting element 41 is integrally attached to a light emitting element substrate 42. Similarly, a light receiving element 43 is provided on the back side of the light receiving lens 15,
The light receiving element 43 is integrally attached to the light receiving element substrate 44.
The light emitting lens 14, the light emitting element 41, the light emitting element substrate 42, the light receiving lens 15, the light receiving element 43, and the light receiving element substrate 44 constitute a distance measuring device.

The light emitting element substrate 42 is fixed to the support frame 46 with screws 45,
The light-receiving element substrate 44 is fixed to the support frame 48 with screws 47. The light receiving element substrate 44 can be displaced with respect to the support frame 48 by loosening the screw 47. That is, by loosening the screw 47, the light receiving element 43 becomes movable along the base line connecting the light emitting element 41 and the light receiving element 43, and the distance between the light emitting element 41 and the light receiving element 43 is adjusted.

A boss 52 is formed on the upper surface of the finder frame 51, and a circuit board 53 is attached to the boss 52. Circuit board 53
Is provided parallel to the upper surface of the frame body of the camera.

FIG. 3 shows a light receiving element substrate 44 and a supporting member 61 for supporting it.
Shows the structure of. The upper end and the lower end of the support member 61 are bent in the horizontal direction, and the light receiving element substrate 44 is arranged between the upper end and the lower end. At the upper end of the light receiving element substrate 44,
A flange 62 that is substantially parallel to the outer surface of the camera body near the light receiving element substrate 44 is provided. In other words, the flange 62 is substantially parallel to the circuit board 53. This flange
An engaging portion, that is, a notch 63 is formed in 62, while a guide hole 64 is formed in a position corresponding to the notch 63 in the finder frame 51, and is provided at a position separated from the circuit board 53 as shown in FIG. To be done. Therefore, the notch 63 also has the shape shown in FIG.
It is located outside the circuit board 53.

The operation of the position adjusting mechanism having the above configuration will be described.

In the present embodiment, an adjusting instrument 65 having a screw 66 and a grip 67 is used. As shown in FIGS. 1 and 2, the adjusting tool 65 is erected substantially perpendicular to the circuit board 53, the tip end thereof is engaged with the guide hole 64, and the screw 66 is provided with a notch in the flange 62. Engaged with 63. In this state, when the adjusting device 65 is rotated around its axis, the light receiving element 43, the light receiving element substrate 44, and the supporting member
61 moves in the vertical direction in the figure, that is, along a base line connecting the light emitting element 41 and the light receiving element 43. As a result, the positional relationship between the light emitting element 41 and the light receiving element 43 is finely adjusted.

As described above, the present embodiment is configured to adjust the position of the light receiving element 43 with respect to the photographing lens in a state where the adjusting tool 65 is erected in the vertical direction with respect to the circuit board 53, and the notch 63 is , Located outside the circuit board 53. Therefore, the adjusting tool 65 does not interfere with the circuit board 53, and the position of the light receiving element 43 can be easily adjusted even when the finder 10 is incorporated in the camera body.

FIG. 4 shows a second embodiment. This embodiment is adopted when the light emitting element and the light receiving element are arranged in the horizontal direction. The structure of the support member 61 is the same as that of the first embodiment,
The configuration of the adjusting device 71 is different from that of the first embodiment. That is, the main body 72 of the adjusting instrument 71 has no screw but has a cylindrical surface. An adjusting pin 73 is provided on the lower end surface of the main body 72 at a position eccentric from the center thereof. Body 72 is notched
The adjustment pin 73 is engaged with the finder frame 51 (first
(See FIG. And FIG. 2).

In this configuration, when the adjusting device 71 is rotated about the adjusting pin 73, the main body 72 of the adjusting device 71 is moved to the adjusting pin 73.
Since it rotates around, the support member 61 moves along the arrow A through the notch 63. Therefore, the light receiving element substrate 44 and the light receiving element move in the horizontal direction, and the position of the light emitting element is adjusted.

In this embodiment as well, the adjusting device 71 is erected vertically to the circuit board, so that it does not interfere with this circuit board and the position of the light receiving element can be easily adjusted even when the finder is incorporated in the camera body. Can be carried out.

FIG. 5 shows a third embodiment, which is also adopted when the light emitting element and the light receiving element are arranged in the horizontal direction. The structure of the support member 61 is the same as in the first and second embodiments,
The configuration of the adjusting device 71 is different. The main body 82 of the adjusting instrument 81 has a cylindrical surface and engages with the notch 63 of the support member 61. The base portion 83 of the adjusting device 81 is supported by an external jig (not shown). The main body 82 is provided on the lower surface of the base portion 83 so as to be eccentric from the center thereof. Therefore, the base of this adjusting device 81
When 83 is rotated, the main body 82 rotates around the center line of the base portion 83, so that the support member 61 moves along the arrow A. Then, the position adjustment of the light receiving element with respect to the light emitting element is performed.

Also in this embodiment, the adjusting tool 81 is erected in the vertical direction with respect to the circuit board, and the position of the light receiving element can be easily adjusted without interfering with the circuit board.

In each of the above embodiments, the light receiving element was configured to be moved for position adjustment, but conversely, the light emitting element 41 and the light emitting element substrate 42 may be configured to be moved, Similar effects are obtained.

〔The invention's effect〕

As described above, according to the present invention, since the adjusting tool does not interfere with the circuit board, the position adjustment of the light emitting element and the light receiving element with respect to the photographing lens can be easily performed even in a state in which the viewfinder is incorporated in the camera body. The effect of greatly improving the work efficiency of this position adjustment can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a perspective view showing the viewfinder of FIG. 1 seen from the opposite direction, and FIG. 3 is a perspective view showing a support member. FIG. 5 is a perspective view showing an essential part of the second embodiment, and FIG. 5 is a perspective view showing an essential part of the third embodiment. 10 …… Finder 41 …… Light emitting element 43 …… Light receiving element 61 …… Supporting member 63 …… Notches 65, 71, 81 …… Adjustment equipment

Claims (1)

[Claims] 1. A distance measuring device provided in a viewfinder of a camera and having a light emitting element and a light receiving element, wherein at least one of the light emitting element and the light receiving element is provided along a base line connecting the light emitting element and the light receiving element. In the element position adjusting mechanism for moving and adjusting the distance between the light emitting element and the light receiving element, the element is arranged substantially parallel to the upper surface of the camera body on the support member to which the element of the light emitting element and the light receiving element to be moved is attached. An element of a distance measuring device characterized in that a flange substantially parallel to the circuit board is provided, and an engaging portion that is located outside the circuit board and is engageable with an adjusting tool is formed on the flange. Position adjustment mechanism.