JPH0453617Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a display window provided in a camera or a lens barrel.

``Prior art'' Conventionally, for example, a technique for displaying a distance scale on a lens barrel is to provide a distance scale by engraving or printing on a part of a distance ring exposed to the outside and display it externally. However, due to the structure of the lens barrel, only the operation part of the distance ring is exposed to the outside, and the distance scale part of the distance ring is placed inside the fixed barrel, and the distance scale is attached to the fixed barrel. There is something that can be read through a window that has been opened.

Such a conventional technique is shown in FIG.
The lens barrel 1 shown in FIG. 4 has a lens barrel main body 2.
The distance ring 3 is rotatably fitted into the holder, and only the operation part 3a of the distance ring 3 is exposed to the outside, and a distance scale 3b is engraved or printed on the outer circumferential surface of the distance ring 3. A display window 4 for externally displaying a distance scale 3b is provided on the lens barrel body 2.

The display window 4 includes a window frame 5 that is recessed in the outer surface of the lens barrel body 2 and has an opening 5a in the center, and is attached to the window frame 5 with an adhesive or double-sided tape. A plastic molded window member 6 having a transparent portion 6a at a position corresponding to the opening 5a.
The distance scale 3b can be displayed externally through the opening 5a and the transparent part 6a.

``Problems that the invention attempts to solve'' However, with such conventional display windows,
In order to plastic mold the window member 6, a gate portion 7 and an overflow portion 8 are required, and after molding, the gate portion 7 and overflow portion 8 are cut at portions A and B to complete the window member 6. However, if this cutting is insufficient, the window member 6
Protrusions remain on both ends of the part, resulting in an unsightly appearance.This cutting operation must be done with great care, which increases manual work in post-processing, increases the number of man-hours, and reduces the quality of the parts. There is a problem that processing costs increase, and since the window member 6 is attached to the window frame 5 using adhesive or double-sided tape, a complicated adhesive work is required. There were problems in that the number of assembly steps increased and the cost increased due to the use of double-sided tape.

This invention was created by focusing on these conventional problems, and can reduce the cost of parts man-hours.
The purpose is to provide a display window that is easy to assemble and has a good appearance.

``Means for solving problems'' The gist of this invention to achieve this purpose is:
A window frame 5 having an opening 5a formed in the camera body or the lens barrel body so that the displayed content of the information display section of the camera body or the lens barrel body can be visually recognized from the outside, and the displayed content can be visually recognized. In the display window 4, the display window 4 is made of a transparent plastic molded member, and the display window member 6 is attached to the window frame of the information display section of the camera body or the lens barrel body. The display window member has the opening 5a formed on a curved surface of the main body or the lens barrel main body, and notches 5b and 5c are formed at both ends of the opening in the circumferential direction. It is formed into a plate shape that is wider than the opening of the window frame, and protrusions 6b' and 6c' are provided at both ends of the plate for inserting into the notch and locking the display window member. The portion is formed by leaving a part of the plastic at the gate portion of the mold during the plastic molding, and the display window member has a curvature larger than the curvature of the window frame.

"Function" In the display window 4, when the window member 6 is disposed within the window frame 5 with both protrusions 6b and 6c of the window member 6 being engaged with the notches 5b and 5c of the window frame 5, Both protrusions (protrusions 6b, 6c) are not visible from the outside, and therefore, a part of the gate part 7 for plastic molding is left behind and the protrusions (protrusions 6b, 6c) are ), and when the window member 6 is placed inside the window frame 5, the lower center part 6e of the window member 6 and both of the protrusions (protrusions 6b, 6c) )
The window member 6 is resiliently supported within the window frame 5 at three points, ie, the upper surfaces 6b' and 6c' of the window frame 5. The window member 6 is supported within the window frame 5 so as not to wobble even when the window member 6 is moved.

"Embodiment" Hereinafter, an embodiment of the present invention will be described based on the drawings. Note that the same parts as in the conventional example described above are given the same reference numerals and redundant explanations will be omitted.

1 to 3 show an embodiment of the present invention.

As shown in FIG. 1, the display window 4 is recessed in the outer periphery of the lens barrel body 2 and has a window frame 5 having an opening 5a in the center. The window member 6 is made of plastic and has a transparent portion 6a at a corresponding position.

Notches 5 are provided at both ends of the window frame 5 as locking parts.
b, 5c are formed.

Projections 6b and 6c are formed at both ends of the window member 6 to engage with the notches 5b and 5c. These projections 6b and 6c form a gate portion 7 that is formed integrally with the window member 6 when the window member 6 is molded with plastic.
It is formed by cutting the gate portion 7 and the overflow portion 8 at portions C and D, respectively, leaving a portion of the overflow portion 8.

On the outer peripheral surface of the window member 6, an index 6d for the distance scale 3b of the distance ring 3 is provided.

Moreover, the window member 6 is molded so that the curvature of the inner circumferential surface of the window member 6 is greater than the curvature of the outer circumferential surface of the window frame 5. As a result, when the window member 6 is assembled to the window frame 5 by engaging the protrusions 6b and 6c of the window member 6 with the notches 5b and 5c of the window frame 5, the lower surface of the window member 6 Central portion 6e and protrusions 6b, 6
The window member 6 is resiliently assembled to the window frame 5 at three points, namely, the upper surfaces 6b' and 6c' of the window c.

The action will be explained below.

First, in order to assemble the window member 6 into the window frame 5,
The window member 6 is elastically deformed as shown by the chain line in FIG. 2, and in this state, each projection 6b, 6c is inserted into each notch 5b, 5c of the window frame 5, and the window member 6 is released. As a result, the window member 6 is stretched against the window frame 5 at three points: the central portion 6e of the lower surface of the window member 6 and the upper surfaces 6b' and 6c' of the protruding members 6b and 6c.
The window member 6 is elastically assembled to the window frame 5 (this assembled state is shown in FIG. 3). Therefore, even if the upper surface of the window member 6 is pressed with a finger, there is no feeling of rattling, and the entire window member 6 does not rattle within the window frame 5.

With the window member 6 assembled to the window frame 5 in this manner, the distance scale 3b is displayed externally through the opening 5a of the window frame 5 and the transparent portion 6a of the window member 6.

It should be noted that the present invention is not limited to the display window of the lens barrel as shown in the above embodiments, but it goes without saying that the present invention can also be applied to the display window provided on the outer surface of the camera body.

"Effect of the invention" According to the display window according to the invention, the window member is assembled into the window frame by locking both protrusions of the window member with both notches of the window frame, and this assembled state In this case, both protrusions are not visible from the outside, so you can leave a part of the gate part for plastic molding and do not have to worry too much about the cutting work to provide both protrusions.
The external appearance can be improved, and therefore the manual work in post-processing is reduced, the number of processing steps is reduced, and the cost of parts processing can be reduced.

In addition, when the window member is assembled within the window frame,
The window member is resiliently supported within the window frame at three points: the center of the lower surface of the window member and the upper surfaces of both of the protrusions. Since the window member is supported by the window frame so that it does not wobble even when not in use, there is no need for adhesives, double-sided tape, etc., and costs can be reduced.

Furthermore, the window member can be assembled into the window frame by simply locking both protrusions of the window member into both notches of the window frame, eliminating the need for complicated gluing work and reducing assembly man-hours. Cost can be reduced.

[Brief explanation of the drawing]

1 to 3 show one embodiment of the present invention, in which FIG. 1 is an exploded perspective view showing a display window provided in a lens barrel, FIG. 2 is a sectional view of the window member, and FIG.
The figure is a cross-sectional view of the display window showing an assembled state, and FIG. 4 is a diagram showing a conventional example, and is an exploded perspective view showing the display window provided in the lens barrel. 2...Lens barrel body, 4...Display window, 5...
Window frame, 5a...Opening, 5b, 5c...Notch (locking part), 6...Window member, 6a...Protrusion, 6
b, 6c...Protrusion, 6e...Bottom center part, 6
b', 6c'...Each upper surface of the protrusion, 7...Gate part,
8... Overflow part.

Claims (1)

[Scope of Claim for Utility Model Registration] A window frame having an opening in the camera body or lens barrel body so that the displayed contents of the information display section of the camera body or lens barrel body can be viewed from the outside; , a display window comprising a transparent plastic molded member through which the displayed content can be visually recognized, and a display window member attached to the window frame of the information display section of the camera body or the lens barrel body, wherein the window frame is , the display window member has the opening formed on a curved surface of the camera body or the lens barrel body, and notches are formed at both ends of the opening in the circumferential direction; It is formed into a plate shape wider than the opening of the window frame, and has protrusions at both ends thereof for inserting into the notch and locking the display window member. A display window of a camera body or a lens barrel body, characterized in that the display window is formed by leaving a part of the plastic of the gate part of the mold, and the curvature of the display window member is larger than the curvature of the window frame.