JP2002258148A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera where a range finding unit is pressed so that the range finding precision is not deteriorated by not having a first box body of the range finding unit deformed when the range finding unit is contained in a second box body and positioned by being pressed in the perpendicular direction. SOLUTION: In the device, at least a pair of optical systems and a pair of light elements are both installed in the first box body and the range finding unit with a partition part that is in parallel to the optical axes of the optical systems between optical paths of the pair of optical systems, and the second box body storing the range finding unit and an elastic member pressing the partition part after the range finding unit is contained in the second box body are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera provided with a distance measuring unit.

[0002]

2. Description of the Related Art A passive type distance measuring unit in which a pair of condenser lenses and a pair of light receiving elements are provided in a first housing is known. When this distance measuring unit is used, the distance measuring unit is housed in a second housing equipped with a finder or the like. At this time, since positioning pins protrude from the bottom surface of the first housing, the positioning pins are fitted in positioning holes provided in the second housing to perform horizontal positioning. Also,
The bottom surface of the first housing, excluding the positioning pins, is brought into close contact with a predetermined surface of the second housing to perform vertical positioning and fix.

[0003]

When the ranging unit is housed in the second housing and the positioning is performed in the vertical direction, the ranging unit is pressed against the second housing. When the upper part of the condenser lens or the light receiving element or the vicinity thereof is partially pressed, the first housing is slightly distorted, and as a result, the distance measurement accuracy is reduced. Even if the upper part of the pair of condensing lenses and the light receiving element and the vicinity thereof are not pressed, if the whole is not pressed uniformly, the distance measurement accuracy similarly decreases.

The present invention has been made in view of such a problem. When the distance measuring unit is housed in a second housing and is positioned by being pressed in the vertical direction, the first housing of the distance measuring unit is moved. An object of the present invention is to propose a camera in which a distance measuring unit is pressed so that the distance measurement accuracy is not deteriorated due to distortion.

[0005]

The above object is achieved by any of the following means.

[0006] At least a pair of optical systems and a pair of optical elements are provided in a first housing, and a partition parallel to the optical axis of the optical system is provided between the optical paths of the pair of optical systems. A distance measuring unit provided in the housing, a second housing accommodating the distance measuring unit, and the distance measuring unit
And a resilient member that presses the partition after being housed in the housing.

[0007] At least a pair of optical systems and a pair of optical elements are provided in the first housing, and a partition parallel to the optical axis of the optical system is provided between the optical paths of the pair of optical systems. A distance measuring unit provided in the housing, a second housing accommodating the distance measuring unit, and the distance measuring unit
And a resilient member that presses the pair of optical systems and the pair of optical elements symmetrically and evenly after being housed in the housing.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a camera according to the present invention will be described with reference to FIGS.

FIG. 1 is an exploded perspective view of a distance measuring unit and a second housing and the like, FIG. 2 is a top view when the distance measuring unit is housed in the second housing, and FIG. 3 is AA in FIG. It is sectional drawing.

In each of the drawings, reference numeral 1 denotes a passive type distance measuring unit, which includes a pair of condenser lenses 11 for condensing subject light, and a pair of light receiving elements (not shown) for receiving condensed subject light. , A transparent light-receiving element protection plate 13, a flexible printed circuit board 14 for guiding the output of the light-receiving element to an external circuit, a first housing 15 for holding these, and a condenser lens 11. Light receiving element 1
And a roof shingle 16 covering the optical path to 2 from above.

An optical path from the pair of condenser lenses 11 to the light receiving element 12 is shielded from each other by a partition 15a provided in the center of the first housing 15 in parallel with the optical axes of these optical systems. ing.

Reference numeral 2 denotes a second housing, which has a housing portion 2a for housing the distance measuring unit 1 and a pair of through holes 2b for guiding subject light to a pair of condenser lenses 11 in front thereof. I have. The finder optical system (not shown) is held on the right side in FIG. Two protrusions 2c and 2d are provided at the center of the bottom surface of the storage portion 2a, a positioning hole 2e is provided in the protrusion 2c, and a positioning hole 2f is provided in the protrusion 2d. Two projections 2g, 2h are provided on the bottom of the housing 2a below the pair of optical axes from the condenser lens 11 to the light receiving element 12.
Are provided respectively. And two projections 2
The heights of c and 2d and the two protruding portions 2g and 2h are the same, and their tip surfaces are formed on the same plane.

On the other hand, positioning pins 15c fitted in positioning holes 2e and positioning pins fitted in positioning holes 2f are formed on the back surface 15b of the partition 15a in the first housing 15 of the distance measuring unit 1. 15d are provided.

Therefore, when the distance measuring unit 1 is stored in the storage portion 2a of the second housing 2, the rear surface 15b of the first housing 15
Abuts on the tip surfaces of the two protrusions 2c and 2d and the two protrusions 2g and 2h, and positioning in the vertical direction is performed.
Further, the positioning pin 15c is inserted into the positioning hole 2e and fitted, and the positioning pin 15d is
Since it is inserted and fitted in f, positioning in the horizontal direction is also performed.

Subsequently, the strip-shaped malt plane 3 is prepared, and the malt plane 3 is bonded to the roof plate 4 so as to be located above the partition part 15a. Then, the roof plate 4 is fixed to the second housing 2 with the small screws 5 so that the malt plane 3 presses the partition portion 15a via the roof plate 16, so that the distance measuring unit 1 is moved in the vertical and horizontal directions. Fixed to

As described above, the partitioning portion 15a of the first housing 15 is pressed when the distance measuring unit 1 is fixed.
The case 15 does not become distorted, and as a result, the problem that the distance measurement accuracy is lowered does not occur.

Further, the malt plane may be formed wide in the direction orthogonal to the optical axis of the condenser lens 11 so that the optical path from the pair of condenser lenses 11 to the light receiving element 12 is symmetrically and uniformly pressed. Even in this case, there is no problem that the first housing 15 is distorted and the distance measurement accuracy is reduced.

Note that an elastic member such as rubber or a leaf spring may be used instead of the malt plane.

[0019]

According to the camera described in claims 1 to 5,
When the distance measuring unit is housed in the second housing and is positioned by being pressed in the vertical direction, the first housing of the distance measuring unit is not distorted and the accuracy of distance measurement does not decrease.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a distance measuring unit, a second housing, and the like.

FIG. 2 is a top view when the distance measurement unit is stored in a second housing.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Distance measuring unit 2 Second housing 3 Malt plane 4 Roof plate 11 Condensing lens 12 Light receiving element 15 First housing 15a Partitioning unit

Claims (5)

[The claims] At least one pair of optical systems and a pair of optical elements are provided in a first housing, and a partition parallel to an optical axis of the optical system is provided between optical paths of the pair of optical systems. A distance measuring unit provided in a first housing; a second housing for housing the distance measuring unit;
And a resilient member that presses the partition after being housed in the housing. 2. A method according to claim 1, wherein at least a pair of optical systems and a pair of optical elements are provided in the first housing, and a partition parallel to an optical axis of the optical system is provided between optical paths of the pair of optical systems. A distance measuring unit provided in a first housing; a second housing for housing the distance measuring unit;
And a resilient member that presses the pair of optical systems and the pair of optical elements symmetrically and evenly after being housed in the housing. 3. The pair of optical systems is a condenser lens,
The camera according to claim 1, wherein the pair of optical elements are light receiving elements. 4. The camera according to claim 1, wherein the elastic member is a malt plane. 5. The camera according to claim 1, wherein the second housing includes a finder optical system.