JP2007199218A - Mirror holding structure and read-out device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a mirror holding structure capable of reducing size and cost. <P>SOLUTION: A leaf spring 1 is engaged with a holding plate 20 by inserting a bent part 2 in the hole 21 of the holding plate 20 in a hooked manner, with a reflection mirror 10 pressurized fixedly in the holding plate direction through the reflection mirror pressurizing part 3 of an arm 4. Also, a part between the bent part 2 of the leaf spring 1 and the arm 4 is arranged close to the longitudinal side face of the reflection mirror 10. As a result, movement of the reflection mirror 10 in the longitudinal direction is restricted, which prevents the reflection mirror 10 from falling from the holding plate 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mirror holding structure and a reading apparatus using the same, and more particularly to a holding structure of an optical mirror constituting an optical system structure in an original reading apparatus such as a facsimile machine, a copying machine, a scanner, or the like.

  FIG. 5 is a diagram showing a conventional mirror holding structure disclosed in Patent Document 1. In FIG. In FIG. 5, in the conventional mirror holding structure, a leaf spring 105 for pressing and fixing the reflecting mirror 103 inserted into the hole-shaped portion (mirror mounting portion) 102 of the supporting plate 104 to the supporting plate 104 is reflected by the reflecting mirror 103. The surface 103b is mounted on the back surface 103a side. Reference numeral 106 denotes a plate-shaped deviation prevention means made of a member having a large surface frictional resistance.

Japanese Patent Laid-Open No. 11-052494 JP 2002-148547 A

  In Patent Document 1, a leaf spring 105 that presses and fixes the reflecting mirror 103 to the support plate 104 is disposed on the back surface 103 a side of the reflecting mirror 103, and the structural portion 101 for supporting the leaf spring 105 is also the back surface 103 a of the reflecting mirror 103. Arranged on the side. Therefore, a space for disposing the leaf spring 105 and the portion 101 that supports the leaf spring 105 is required on the back surface 103a side of the reflection mirror 103, which hinders downsizing of the apparatus.

  Further, in Patent Document 1, a support plate 104 that supports the reflection mirror 103 and the leaf spring 105 is also required on the back surface 103a side of the reflection mirror 103 for supporting the leaf spring 105 (the portion 101 that supports the leaf spring 105 is provided). Further, an additional member is required to suppress the movement of the reflecting mirror 103 in the surface direction, and the number of parts to be assembled increases, resulting in an increase in apparatus cost.

  Patent Document 2 discloses a mirror holding structure including a spring member that partially engages a support member that supports a mirror and presses and fixes the mirror in the direction of the support member. It is not necessary to provide a portion for supporting the spring member on the rear side of the mirror. However, the spring member described in Patent Document 2 does not have a function of preventing the mirror from dropping from the support member when the mirror moves in the mirror longitudinal direction due to vibration or the like.

  An object of the present invention is to provide a mirror holding structure that can be reduced in size and cost, and a reading apparatus using the same.

  A mirror holding structure according to the present invention is a mirror holding structure for holding both longitudinal end portions of a mirror in a reading device, and a support member for supporting one end of the mirror in the longitudinal direction, and a part of the support member are engaged with the support member. The surface of the mirror opposite to the surface in contact with the support member is pressed in the direction of the support member, and the portion between the portion locked by the support member and the portion pressed in the direction of the support member is the mirror. And a spring member disposed in proximity to the longitudinal side surface of the.

  In the mirror holding structure, the portion locked by the support member has a bent shape that is inserted into an opening provided in the support member and is hung on the support member, and the spring member Has a substantially U-shape.

  The reader according to the present invention uses the mirror holding structure.

  Thus, in the present invention, in the spring member for pressing and fixing the mirror to the support member, the generation direction of the force for pressing and fixing the mirror is set to the direction in which the spring member extends and contracts to the original shape, And the fulcrum of a spring member is provided in the support member of the mirror. Further, in the spring member, the portion between the fulcrum portion of the spring member and the portion that presses and fixes the mirror to the support member is the longitudinal direction of the mirror so that the movement in the surface direction (longitudinal direction) of the mirror can be restricted. The shape is arranged close to the side surface.

  According to the present invention, in the spring member, by setting the generation direction of the force for pressing and fixing the mirror as described above, the mirror is pressed and fixed to the support member without arranging the spring member on the back surface side of the mirror reflecting surface. As a result, there is no need for a space for arranging components on the back surface side of the mirror reflection surface. In addition, since the portion between the fulcrum portion of the spring member and the portion that presses and fixes the mirror to the support member is disposed close to the side surface in the longitudinal direction of the mirror, when the mirror moves in the mirror longitudinal direction by an external force, When the spring member and the mirror come into contact with each other, the longitudinal movement of the mirror is suppressed, and the mirror can be prevented from falling off.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 is a cross-sectional view of a mirror holding structure according to an embodiment of the present invention, FIG. 2 is a front view of a reader using the mirror holding structure of FIG. 1, and FIG. 3 is a perspective view of a leaf spring 1 of FIG. FIG. 4 is an exploded perspective view of the mirror holding structure of FIG. In each of these drawings, equivalent parts are indicated by the same reference numerals.

  In FIG. 1, reference numeral 10 denotes a reflection mirror for forming an optical path. Reference numeral 1 denotes a metal leaf spring, 2 denotes a bent shape portion, 3 denotes a reflection mirror pressing portion, and 4 denotes an arm portion. Reference numeral 20 denotes a support plate for mounting the reflection mirror 10 and the leaf spring 1, and is fixed in a housing 100 (see FIG. 2) of a reading device such as a facsimile machine, a copying machine, or a scanner. 21 is a hole for inserting and fixing the bent portion 2 of the leaf spring 1, and 22 is a protrusion for supporting the reflection mirror 10. In FIG. 2, reference numerals 11 to 13 denote reflection mirrors for forming an optical path, which correspond to the reflection mirror 10 in FIG.

  1, FIG. 2 and FIG. 4 only show a configuration in which one end in the longitudinal direction of the reflection mirror is held by the support plate 20 and the leaf spring 1, but the support plate and the leaf spring are similarly applied to the other end of the reflection mirror. Of course, it is held by.

  Next, a mirror holding structure according to an embodiment of the present invention will be described in detail with reference to FIGS.

  The support plate 20 is provided with a protrusion 22 for holding the reflection mirror 10 and a hole 21 at a position on the reflection surface side of the reflection mirror 10 for holding the leaf spring 1. The leaf spring 1 is inserted into the hole 21 of the support plate 20 so that the bent shape portion 2 of the leaf spring 1 is hooked on the support plate 20, thereby locking the plate spring 1 to the support plate 20. Hold. In order to hold and fix the reflection mirror 10 to the support plate 20, the reflection surface of the reflection mirror 10 is brought into contact with the protrusion 22 of the support plate 20, and the reflection spring 10 is pressed from the back of the reflection mirror 10 by the reflection mirror pressing portion 3 of the leaf spring 1. The reflecting mirror 10 is fixed by pressing the reflecting mirror 10 against the protrusion 22 of the support plate 20 with the spring force of.

  Thus, by providing the holding point of the leaf spring 1 on the reflection surface side of the reflection mirror 10, only the arm portion 4 having the reflection mirror pressing portion 3 of the leaf spring 1 is disposed on the back surface side of the reflection mirror 10. become. Therefore, a necessary space for mounting components required for fixing the reflection mirror around the reflection mirror 10 can be minimized, and the apparatus can be miniaturized.

  The leaf spring 1 has a substantially U-shape that wraps the reflection mirror 10 from the longitudinal side surface of the reflection mirror 10 (one end surface of the reflection mirror 10). The part between the arm parts 4 is disposed close to the side surface in the longitudinal direction of the reflection mirror 10. That is, the spatial distance between the inner surface of the leaf spring 1 and the side surface in the longitudinal direction of the reflection mirror 10 is set to the minimum necessary size in consideration of the attachment operation of the leaf spring 1 and the dimensional variation of each component. .

  Therefore, even when vibration / impact occurs during the conveyance of the apparatus and the reflection mirror 10 moves in the longitudinal direction of the mirror, the reflection mirror 10 is brought into contact with the inner surface of the leaf spring 1 by the longitudinal side surface of the reflection mirror 10 contacting. The leaf spring 1 itself is also locked to the support plate 20 and does not fall off from the support plate 20, so that it is possible to prevent the reflection mirror 10 from falling off the support plate 20. it can.

  As described above, in the mirror holding structure according to the embodiment of the present invention, only the arm portion 4 of the leaf spring 1 is disposed on the back side of the reflection mirror 10, and the back side of the reflection mirror 10 is supported for supporting the leaf spring 1. Therefore, the space required for fixing the reflecting mirror 10 can be minimized and the apparatus can be downsized.

  Further, in the mirror holding structure according to the embodiment of the present invention, the leaf spring 1 not only presses and fixes the reflecting mirror 10 but also has a function of preventing the reflecting mirror 10 from falling off, thereby reducing the number of parts and reducing the cost. Can be achieved.

  Although the leaf spring 1 is used in the above embodiment, the spring may be formed using a wire material instead of forming the spring using a plate material. Also in this case, as in the case of the plate material, the bent shape part for hooking and fixing the spring to the support plate 20 and the shape of the arm part and the reflection mirror pressing part for pressing and fixing the reflection mirror are formed. The same effect as the embodiment can be obtained.

It is sectional drawing of the mirror holding structure by the Example of this invention. It is a front view of the reading apparatus using the mirror holding structure of FIG. It is a perspective view of the leaf | plate spring of FIG. It is a disassembled perspective view of the mirror holding structure of FIG. It is a figure which shows the conventional mirror holding structure.

Explanation of symbols

1 leaf spring
2 Bending shape
3 Reflecting mirror pressing part
4 Arms 10, 11-13 Reflection mirror
20 Support plate
21 holes
22 Protrusions
100 housing

Claims (4)

A mirror holding structure for holding both longitudinal ends of the mirror in the reading device,
A support member for supporting one end in the longitudinal direction of the mirror;
Part of the support member is locked, and the surface of the mirror opposite to the surface in contact with the support member is pressed toward the support member, and the portion locked by the support member is pressed toward the support member. And a spring member disposed in the vicinity of the side surface in the longitudinal direction of the mirror.   The mirror holding structure according to claim 1, wherein the portion locked by the support member has a bent shape that is inserted into an opening provided in the support member and is hung on the support member.   The mirror holding structure according to claim 1, wherein the spring member has a substantially U-shape.   A reading apparatus using the mirror holding structure according to claim 1.

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