JPH0536401U - Roof mirror - Google Patents

Abstract

(57) [Summary] [Object] To provide a roof mirror that is easy to assemble and is less likely to cause deviations in the corners of plane mirrors over time. [Structure] A pair of plane mirrors M1 and M2 and these plane mirrors M
A pair of supporting members 10 and 20 for supporting M1 and M2 at both ends.
And a fixing means for fixing each plane mirror to each support member by adhesion or the like, and each of the pair of support members 10 and 20 has a support surface 10A, 1 with which the mirror surface portions of both ends of each plane mirror come into surface contact.
0B and the like are formed with a predetermined angle.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a roof mirror.

[0002]

[Prior Art]

 Roof mirrors are often used in exposure devices of copying machines and document scanning devices of facsimiles. This roof mirror is constructed by combining a pair of flat mirrors so that the mirror surfaces form a predetermined angle, and bends the optical path from the document to the photoconductive photoconductor or the image sensor. Used to.

A roof mirror that is particularly often used is for scanning an original, and a light beam from a scanning mirror that scans the surface of the original with a lamp is folded back toward an imaging lens system to reflect the light. It moves in the same direction at half the speed of the scanning mirror to keep the optical path length from the document surface to the imaging lens system unchanged.

Such a roof mirror is generally configured by supporting a pair of flat mirrors at both ends thereof with a pair of supports. Conventionally, the support of each flat mirror end is performed as shown in FIG. In FIG. 3, reference numeral 1 indicates a support member that supports one end of each of the two-faced plane mirrors M1 and M2. The support member 1 is provided with support holes 1A and 1B for supporting a plane mirror and an adjustment hole 1C.

A pair of adjusting screws 3A is screwed into the supporting hole 1A from the adjusting hole 1C side, and the tip end thereof projects into the supporting hole 1A. Further, a leaf spring 4A is provided in the support hole 1A so as to face the adjusting screw 3A. The support hole 1B is provided with a pair of adjusting screws 3B and a leaf spring 4B in the same manner as in the support hole 1A.

The flat mirror M1 has its end portion inserted into the support hole 1A and is pressed against the tip end portion of the adjusting screw 3A by the leaf spring 4A from the back side with the mirror surface side facing the adjusting screw 3A. Thus, the plane mirror M1 is supported by the support member 1 by the adjusting screw 3A and the plate spring 4A. The plane mirror M2 is supported by the support member 1 by the adjusting screws 3B and 4B in exactly the same manner. The other ends of the plane mirrors M1 and M2 are similarly supported. The adjustment screws 3A and 3B are used to adjust the angles formed by the plane mirrors M1 and M2 so that the angles become a predetermined angle. In addition, a method is also used in which the support member itself can be swung around a predetermined axis, and the position of the support member with respect to the axis is adjusted to adjust the angle between the plane mirrors.

As described above, in the conventional flat mirror support, firstly, the structure of the support member is complicated, and secondly, the flat mirror support work includes "the work of adjusting the angle formed by the flat mirrors", and therefore, When the assembling efficiency is low, and further, when the original is used for scanning and scanning the original to be moved, the supporting state of each plane mirror has a problem that it is distorted with time due to vibration or the like.

[0008]

[Problems to be solved by the device]

 The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a novel roof mirror which has a simple structure, is easy to assemble, and is less likely to cause an error in the support position of the assembled flat mirror.

[0009]

[Means for Solving the Problems]

 The roof mirror of the present invention is a roof mirror formed by "combining a pair of plane mirrors so that the mirror surfaces form a predetermined angle and integrating them", and a pair of plane mirrors, a pair of support members, and a fixed member. And means.

The “pair of plane mirrors” are combined in a roof shape with a predetermined angle. As each plane mirror, a metal plate having a mirror surface or a plate made of metal, glass, plastic, or the like having a reflection film formed thereon can be used. In the case of a surface mirror, a protective film may be formed on the mirror surface. The thickness of the plane mirror is arbitrary. The "pair of support members" support the pair of flat mirrors at both ends. The "fixing means" fixes each flat mirror end portion to each support member.

Each of the pair of support members has a support surface with which “the mirror surface portions at both ends of each flat mirror (in the case of a front surface mirror, the same surface as the mirror surface, and in the case of a back surface mirror, the surface of the flat mirror) are in surface contact. It is formed with a predetermined angle (corner where the mirror surfaces should be mutually).

The fixing means may be “adhesion” (Claim 2), or a “leaf spring” which is provided on the support member and presses the flat mirror from the rear side of the flat mirror toward the support surface of the support member. (Claim 3)

[0013]

[Action]

 In this invention, the flat mirror ends are fixed to the support member in a state where the mirror surface portions at both ends are in surface contact with the support surfaces, but the support surfaces are formed at predetermined angles (angles between the mirror surfaces). Therefore, when the flat mirror pair is fixed to the pair of supporting members, the flat mirror pair automatically completes as a roof mirror having a predetermined angle.

[0014]

【Example】

 Specific examples will be described below.

In FIG. 1A, reference numerals M1 and M2 indicate plane mirrors as in FIG. These plane mirrors M1 and M2 have a rectangular shape and have their longitudinal directions parallel to each other and are integrated by a pair of supporting members 10 and 20 at a predetermined angle. The support members 10 and 20 are plate-shaped and have “exactly the same shape”. As in the supporting member 10 illustrated in FIG. Supporting surfaces 10A and 10B, which are supported in surface contact at both ends in the direction, are formed in "thickness portions". The angle θ formed by these supporting surfaces 10A and 10B is accurately finished to the angle formed by the plane mirrors M1 and M2. Therefore, the ends of the plane mirrors M1 and M2 are supported as shown in FIG. 1 (b). The plane mirrors M1 and M2 automatically form the angle θ to be formed by merely making surface contact with the surfaces 10A and 10B.

In this embodiment, the fixing means for fixing the plane mirrors M1 and M2 to the pair of supporting members is “adhesion”. That is, the plane mirrors M1 and M2 are adhered to a predetermined supporting surface in surface contact with each other. In this way, the plane mirrors M1 and M2 and the pair of support members 10 and 20 are integrated, and a roof mirror as shown in FIG. 1A is obtained.

FIG. 2 shows a modified embodiment. The pair of support members have exactly the same shape, and one support member 12 is illustrated in FIG. The plane mirrors M1 and M2 have their mirror surfaces at both ends in the longitudinal direction brought into surface contact with the support surfaces 12A and 12B of the support member 12, and are fixed by being pressed against the support surfaces 12A and 12B from the back side by the leaf springs 13A and 13B. .. The leaf springs 13A and 13B are fixed to the support member 12 with “screws”. The supporting surfaces 12A and 12B are of course formed with the corners that the plane mirrors M1 and M2 should form.

[0018]

[Effect of the device]

 As described above, according to this invention, a new roof mirror can be provided. This roof mirror is easy to assemble because the angle between the plane mirrors can be realized only by fixing the plane mirror to the support surface while the plane mirror is in surface contact with the support surface of the support member. Since the relation of is a surface contact state, the angle formed by the plane mirrors is unlikely to be deviated due to vibration or the like.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram for explaining another embodiment.

FIG. 3 is a diagram for explaining a conventional technique and its problems.

[Explanation of symbols]

 10, 20 Support member 10A, 10B Support surface M1, M2 Plane mirror

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yukio Yamamoto 2-8 Omorinishi, Ota-ku, Tokyo ・ Tokyo Special Glass Co., Ltd.

Claims (3)

[Scope of utility model registration request] 1. A roof mirror formed by combining a pair of plane mirrors so that the mirror surfaces form a predetermined angle, and integrating the pair of plane mirrors, and a pair of supports for supporting the plane mirrors at both ends. And a fixing means for fixing each flat mirror to each support member. Each of the pair of support members is formed with a support surface with which the mirror surface portions of both end portions of each flat mirror are in surface contact with each other. A roof mirror that is characterized by: 2. The roof mirror according to claim 1, wherein the fixing means is an adhesive. 3. The roof mirror according to claim 1, wherein the fixing means is a leaf spring that is provided on the support member and presses the flat mirror from the back side of the flat mirror toward the support surface of the support member.