JP2001117142A - Finder device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a finder device capable of preventing dust or soldering flux from being scattered to the periphery of the ocular part of the finder device and from adhering to an ocular. SOLUTION: In this finder device, an LCD holding frame 5 provided with an aperture part 5a for a flare diaphragm is disposed on the rear surface side of the ocular 4, and an LCD display board 6 capable of controlling light shielding is held on the frame 5 in a state where it is pressed by an LCD pressing plate 7. Then, the device is provided with upper and lower canopy parts 5i and 5j projected in a fin state on the ocular part 4 side, and the dust or the soldering flux is prevented from adhering to the ocular part 4 by the parts 5i and 5j.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a structure around an eyepiece in a finder device.

[0002]

2. Description of the Related Art In a conventional finder structure, assembly, electrical wiring work, and adjustment work before an outer cover is attached around an eyepiece are performed in an open state where the eyepiece is exposed to the outside. Was.

[0003]

However, in the case of the above-described conventional finder structure, there is a high possibility that dust adheres to the surface of the eyepiece lens due to the above-mentioned assembling operation. When there is a flexible printed circuit board (hereinafter, referred to as FPC) arranged around the board, soldering work may be performed on the board. At that time, the solder flux might be scattered and attached to the surface of the eyepiece near the solder flux.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can prevent dust and solder flux from scattering around the eyepiece portion of the finder device and attaching to the eyepiece during assembly work. It is an object to provide a simple finder device.

[0005]

According to a first aspect of the present invention, there is provided a finder apparatus comprising: an eyepiece; a display member disposed behind the eyepiece and capable of changing transmittance; And a holding member that covers the upper part or the entire circumference of the eyepiece, and the eyepiece is covered with the holding member.

According to a second aspect of the present invention, in the finder device according to the first aspect, the holding member covers at least one of an upper portion and a lower portion of the eyepiece.

According to a third aspect of the present invention, in the finder device according to the first aspect, the holding member holds the display member relatively non-parallel to the eyepiece.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view around an eyepiece of a finder device showing one embodiment of the present invention. 2 and 3 are a vertical sectional view around the eyepiece section of the finder device as viewed from the left side and a transverse sectional view as viewed from above. In the following description, the object side (subject side) is defined as the front side, and the eyepiece side (eye point side) is defined as the rear side, and the left-right direction is the direction when the object side is viewed from the eyepiece side.

The finder device according to the present embodiment is a real image type finder device applied to a camera, and mainly includes an objective finder optical system (not shown), a finder main body 1 supporting a finder constituent member, a prism 3, and an objective. An eyepiece 4 for enlarging an image, an LCD holding frame 5 as a holding member, a finder lid 2 for covering an upper surface of the prism 3,
LCD display panel 6 of display member supported by LCD holding frame 5
And an LCD pressing plate 7 as a pressing member, and a guide shaft 8 for guiding and supporting the eyepiece 4 so as to be able to advance and retreat for adjusting diopter.
A focusing display attached to the LCD holding frame 5, an LED 10 for strobe charging completion display, a finder window 11,
A rear cover 12 for supporting a finder window or the like;
2 and a rubber cover 13 for protecting the observation eyes.

An eyepiece 4 is provided on the finder body 1.
Are provided with guide portions 1a and 1b sandwiching both sides of the eyepiece, a groove portion 1c through which the arm portion 4a of the eyepiece lens 4 is inserted, a slope 1d, and a positioning pin 1e on the slope.

The LCD holding frame 5 has a flare stop opening 5a provided on the rear side of the eyepiece 4,
Upper, lower, and left side frame portions 5b for positioning the display panel 6, notch portions 5c serving as escape portions of the LCD sealing portion provided on the left side of the frame portion, and locking projection portions 5d provided on both outer surfaces.
An inclined mounting portion 5e facing the main body slope 1d, a positioning hole 5f and an LED positioning pin 5g on the mounting portion 5e, an upper eaves portion 5i and a lower eaves 5j projecting in a fin shape toward the eyepiece lens, A side wall 5k and a recess 5h on the right side wall are provided.

In the LCD panel 6, the sealing liquid is sealed inside two glass plates by a sealing portion 6a.
The LCD panel 6 has a not-shown F at the right end.
PC (flexible printed circuit board) is connected,
The transmittance is controlled by the drive output based on the release signal, and the transmitted light is temporarily blocked from the normal transparent state.

The LCD pressing plate 7 is an elastically deformable thin plate member. An opening 7a larger than the aperture opening 5a is provided at the center, and a latching portion of the LCD holding frame is provided at a folded portion on both sides. Locking hole (engaging hole) 7c to be (engaging portion)
In addition, the upper and lower sides of the opening 7a form a curved surface portion 7b bulging toward the front LCD display panel 6 side.

The finder window 11 is attached to the opening of the rear cover 12 by ultrasonic welding, and
It is arranged behind the D display panel 6. The outside of the rear cover 12 is covered with a rubber cover 13 for eye protection.

The LCD holding frame 5 is provided with the finder body 1.
The positioning hole 5f is inserted into the positioning pin 1e to be positioned, and the concave portion 5h is fitted to the guide portion 1a and is attached in a state where it is prevented from rotating. In this state, an adhesive is applied to the gap S1 between the guide portion 1b and the left wall portion 5k to be fixed. Further, the positioning holes 9a of the LED mounting base 9 are fitted to the LED positioning pins 5g on the inclined mounting portion 5e.
The LED 10 is mounted in a state of being inclined with respect to the finder optical axis Of.

Further, the LCD display plate 6 is mounted on the LCD holding frame 5 by using the LCD pressing plate 7.
The display panel 6 is inserted into the frame portion 5b of the LCD holding frame 5, and LC
The LCD 7 is formed by elastically deforming the curved surface portion 7b of the D pressing plate 7.
The display panel 6 is pressed, and L is
The locking hole (fitting hole) 7c of the CD pressing plate is fitted and locked to bring it into the mounted state.

As shown in the vertical sectional view of FIG. 2, FPCs 21 and 23 for controlling the LCD panel 6 and other drive control units are provided on the upper surface of the finder cover 2. The FPC is connected to the upper part of the finder cover 2 by soldering.

The above-mentioned LCD of the finder device of the present embodiment
The display panel 6 and the finder window 11 are arranged along the eyepiece optical axis Of, but as shown in the longitudinal sectional view of FIG.
Surface 6b of D display panel 6 and surface 11a of finder window 11
Are tilted in different directions with respect to the finder optical axis Of. That is, the surface 6b of the LCD panel 6 is inclined at an angle θ1 smaller than 90 ° with respect to the optical axis Of on the vertical section, and the surface 1b of the finder window 11 is inclined.
1a is inclined at an angle .theta.2 greater than 90 DEG.

As described above, the surface 6b of the LCD panel 6 and the surface 11a of the finder window 11 are arranged to be inclined in different directions with respect to the finder optical axis Of.
For the following reasons.

If the LCD panel 6 and the finder window 11 are arranged on a plane orthogonal to the optical axis Of in terms of design dimensions, variation in the shape of each member causes
In an actual assembled state, there is a high possibility that each of them is inclined at a slight angle in a different direction with respect to the optical axis Of. The LCD panel 6 and the finder window 1 are inclined by the slight angle.
There was a possibility that a ghost was generated in the finder image due to the reflected light on each surface of No. 1 and the observation became difficult.

Therefore, in the camera of the present embodiment, as described above, the LCD panel 6 and the finder window 11 are provided.
Are arranged at an inclination (angles θ1 and θ2) to such an extent that the ghost does not occur.

When the LCD holding frame 5 is attached to the finder main body 1, the eyepiece lens 4 has its upper surface covered with the upper eaves 5i of the LCD holding frame as shown in FIGS. It is covered with the eaves portion 5j, the side surface is covered with the guide portions 1a and 1b of the finder main body 1, and the rear surface side is covered with the surface around the opening 5a of the LCD holding frame 5 and the LCD display panel 6.

Accordingly, the eyepiece lens 4 is held in a state where the periphery thereof is dustproof. The dust generated during the assembling work and the FPC 21 on the upper part of the finder lid 2 described above,
The flux or the like scattered during the soldering operation at 23 can be prevented from adhering to the surface of the eyepiece 4.

In the finder device of this embodiment, when external light L0 enters from the finder window 11 as shown in FIG. 2, the lower surface of the finder main body 1 and the tip of the lower eave 5j of the LCD holding frame 5 are moved. The gap is so narrow that only a small amount of leaking light can enter the camera.

On the other hand, at the lower part of the finder device, there is a joint gap S2 between the rear cover 12 and the camera body 14, and the film 18 is located on the pressure plate 16 on the front surface of the rear cover 15 beyond the gap. Note that a rubber packing 17 is provided at a joint between the rear cover 12 and the rear lid 15.

The slight leaked light beam is attenuated in the bonding gap and does not reach the film 18, so that the exposure of the film to external light can be reliably prevented.

In the finder device of the present embodiment configured as described above, in a normal state in which the release operation is not performed when the power supply of the camera is turned on, the LCD display plate 6 is in a state of transmitting incident light, and the finder window is opened. A subject image is observed by the eyepiece 4 through the LCD 11 and the LCD panel 6. At that time, unnecessary incident light from the objective side is
A good subject image which is regulated by the aperture opening 5a of the holding frame 5 and has no ghost is observed.

Further, when the focusing operation is completed or the strobe charging is completed, the LED 10 is turned on, and the finder window 11 is turned on.
Is recognized at the right end of the

Then, when the release operation on the camera side is executed, the LCD display panel 6 is instantaneously blocked, and it is recognized that the shutter has been released through the finder window 11.

As described above, according to the finder device of the present embodiment, since the periphery of the eyepiece lens 4, particularly the upper and lower portions, is covered with the eaves of the LCD holding frame 5, it occurs during assembly. Dust and flux during soldering are reliably prevented from adhering to the eyepiece 4.

Since the gap between the lower portion of the finder body 1 and the lower eaves 5i of the LCD holding frame 5 is extremely narrow, leakage of external light passing through that portion is limited.
The film 18 can be prevented from being exposed to the external light.

Further, the LCD panel 6 and the finder window 1 are provided.
1 is a tilt angle (angle θ1) at which the ghost does not occur.
And θ2), a ghost image without ghost can be observed.

In the finder device of the present embodiment, the periphery of the eyepiece is not sealed, but the shape of the LCD holding frame 5 is further considered in order to further enhance the dustproof effect. It is also possible to eliminate the gap between the finder cover 1 and the finder cover 2 and obtain a completely sealed structure.

Based on each of the above embodiments, (1) a real image type finder having an eyepiece for enlarging an objective image and a display member capable of changing the transmittance, the display member being replaced by the eyepiece And a holding member for holding the display member is provided, and the holding member covers a part or the entire circumference of the eyepiece lens. Can be.

[0035]

As described above, according to the finder device of the present invention, since the holding member covers the entire circumference or the upper part of the eyepiece, dust and solder flux scatter around the eyepiece and the eyepiece is scattered. Is prevented from adhering to.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a finder device according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view around an eyepiece of the finder device according to the embodiment.

FIG. 3 is a cross-sectional view around an eyepiece of the finder device according to the embodiment.

[Explanation of symbols]

 3 ... eyepiece 5 ... LCD holding frame (holding member) 6 ... LCD display panel (display member)

Claims (3)

[Claims] 1. An eyepiece, a display member disposed behind the eyepiece and capable of changing transmittance, and a holding member that holds the display member and covers an upper part or an entire circumference of the eyepiece. A finder device, comprising: 2. The finder device according to claim 1, wherein the holding member covers at least one of an upper side and a lower side of the eyepiece. 3. The finder device according to claim 1, wherein the holding member holds the display member relatively non-parallel to the eyepiece.