JP2000075195A - Reflection mirror holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent the opening of the spacing of holding pieces for holding both ends of a reflection mirror and to prevent the dislodgment of this reflection mirror by providing the reflection mirror holder with a reinforcing member which is spanned between these holding pieces and has strength in a tension direction. SOLUTION: The ends of the reflection mirror 7 are inserted into the mirror holding holes of mirror brackets 9 acting as the holding pieces and the end faces thereof are held down by left springs 18 mounted at the outer flanks of the mirror brackets 9. Two notches 19, 20 are formed at the outer edges of the mirror brackets 9 and projections 21 projecting outward are formed in the intermediate positions thereof. The reinforcing member 25 formed by bending a wire at a first curving point 22, a second curving point 23 and a third curving point 24 is disposed. This reinforcing member 25 is spanned between the mirror brackets 9. Since the reinforcing member 25 is formed of the wire, the strength in the tension direction is extremely high and the member reinforces the mirror brackets 9 on both sides so as to prevent their spacing from being opened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflection mirror holding device in an image reading apparatus having a reflection mirror, such as a copying machine, a facsimile, and an image scanner.

[0002]

2. Description of the Related Art An example of a conventional image reading apparatus using a reflection mirror will be described with reference to FIGS. First, a transparent flat original glass 2 is provided on the upper surface of the housing 1. Below the original glass 2, a first scanning body 3 and a second scanning body 4 that reciprocate along the original glass 2 are provided.

The first scanning body 3 is provided with a lamp 6 for illuminating the original 5 placed on the original glass 2 from below and a first reflection for reflecting vertically reflected light from the original 5 horizontally. And a mirror 7. The reflection mirror 7 has a reflection surface length equal to or larger than the maximum width of the document 5. The first reflecting mirror 7 is fixed to the scanning body base 8 and is a mirror bracket 9 which is erected and opposed to each other.
Are held at both ends. That is, a mirror holding hole 10 is formed in the mirror bracket 9, and the outer end thereof is pressed by a mirror pressing spring (not shown) to prevent the mirror bracket 9 from being pulled out.

[0004] The second scanning member 4 vertically reflects the light reflected from the first reflecting mirror 7 and further horizontally reflects the light reflected from the second reflecting mirror 11. And a third reflecting mirror 12 that reflects light in the direction. These second and third reflection mirrors 11, 12
Also the mirror bracket 1 formed on the scanning body base 13
The respective ends are held at 4, 15 respectively. These reflecting mirrors 11 and 12 also have a reflecting surface length equal to or larger than the maximum width of the document 5.

[0005] An image forming lens 16 and an image forming element 17 such as a CCD are arranged on the optical axis of the light reflected by the third reflecting mirror 12.

In such a configuration, the original is read by reciprocating the first scanning body 3 and the second scanning body 4 along the original glass 2 on which the original 5 is placed. That is, the reflected light from the surface of the original 5 is reflected in the order of the first reflecting mirror 7, the second reflecting mirror 11, and the third reflecting mirror 12, and is read by the imaging element 17 via the imaging lens 16.
At this time, the first scanning body 3 moves in principle over the entire length of the original glass 2, but the movement of the second scanning body 4 is controlled so that the optical path length to the imaging element 17 does not change. The range is set to be 1/2 of the first scanning body 3.

[0007]

The state shown in FIG. 8 is a state in which the first reflection mirror 7 is omitted in which the illustration of the mirror pressing spring is omitted. When an impact force S along the longitudinal direction of the scanning body base 8 holding the first reflecting mirror 7 acts on the scanning body base 8 due to transportation of the apparatus, a reaction force F is applied to the first reflecting mirror 7 by its mass. appear. Thereby, the right end of the first reflection mirror 7 is held by the mirror pressing spring so as not to protrude rightward from the mirror bracket 9, and is pressed by the first reflection mirror 7 as shown in FIG. 9. As a result, the mirror bracket 9 may be bent, and the left end of the first reflection mirror 7 may come off the mirror bracket 9 and come off.

[0008]

According to the first aspect of the present invention,
A reflecting mirror having a predetermined length for reflecting an original image, a pair of holding pieces provided at predetermined intervals so as to hold both ends of the reflecting mirror, and a plate for pressing and fixing the reflecting mirror to these holding pieces; It comprises a spring and a reinforcing member having a strength in the tensile direction which is stretched between the holding pieces on both sides.

According to a second aspect of the present invention, there is provided a reflecting mirror having a predetermined length for reflecting an original image, a pair of holding pieces provided at predetermined intervals so as to hold both ends of the reflecting mirror, and It comprises a leaf spring that presses and fixes the reflection mirror to the holding piece, and a reinforcing member that is stretched between the leaf springs on both sides and has strength in the tensile direction.

According to a third aspect of the present invention, in the first or second aspect, the reinforcing member is a wire.

According to a fourth aspect of the present invention, there is provided a reflecting mirror having a predetermined length for reflecting a document image, a pair of holding pieces provided at predetermined intervals so as to hold both ends of the reflecting mirror, It comprises a leaf spring that presses and fixes the reflection mirror to the holding piece, and a reinforcing member that is stretched between the holding pieces on both sides and has strength in the tensile direction and the bending direction.

According to a fifth aspect of the present invention, there is provided a reflecting mirror having a predetermined length for reflecting a document image, a pair of holding pieces provided at predetermined intervals so as to hold both ends of the reflecting mirror, A leaf spring that presses and fixes the reflection mirror to a holding piece, a reinforcing member that is stretched between the holding pieces on both sides and has strength in a tensile direction and a bending direction, and abuts on the reflection mirror to reinforce the reflection mirror. And a vibration suppression member provided between the members.

According to a sixth aspect of the present invention, the reinforcing member according to the fourth or fifth aspect of the invention is characterized in that the plate-like member is cut and bent along the longitudinal direction.

[0014]

FIG. 1 shows a first embodiment of the present invention.
A description will be given based on FIG. Since the basic structure of the image reading apparatus according to the present embodiment is the same as that shown in FIG. 7, the reference numerals used in FIG. 7 are used, and the description of those parts is omitted. That is, the portion shown in FIGS. 1 and 2 is a holding structure of the first reflecting mirror 7 (hereinafter, simply referred to as the reflecting mirror 7), and a mirror bracket in which an end of the reflecting mirror 7 acts as a holding piece. 9 is inserted into the mirror holding hole 10 and the end face is held down by a leaf spring 18 attached to the outer surface of the mirror bracket 9 as in the related art.

Therefore, in the present embodiment, two notches 19, 20 are formed on the outer edge of the mirror bracket 9, and a projection 21 projecting outward at an intermediate position between these notches 19, 20 is formed. Is what is being done. Then, a reinforcing member 25 formed by bending the wire at the first bending point 22, the second bending point 23, and the third bending point 24 is provided, and the reinforcing member 25 is wrapped around the mirror bracket 9. Have been. That is, the vicinity of the first bending point 22 of the reinforcing member 25 is fitted in the notch 19, and the second bending point 23 and the third bending point 24 are The space is fitted into the notch 20, and the reinforcing member 25 is attached to the mirror bracket 9 so as not to fall off. Since the reinforcing member 25 is formed of a wire, the strength in the pulling direction is extremely high, and the reinforcing member 25 is reinforced so that the gap between the mirror brackets 9 on both sides is not widened.

In such a configuration, as shown in FIG. 8, when the impact force S acts and the reaction force F of the reflecting mirror 7 acts on the mirror bracket 9 during transportation or the like, as shown in FIG. Tries to deform outward,
Since the other mirror bracket 9 is also connected by the reinforcing member 25, only one side does not open. When the impact force S is extremely large and a large reaction force F is applied, both of the mirror brackets 9 may be deformed. In this case, the mirror bracket 9 is deformed in the same direction. Therefore, the interval between the two mirror brackets 9 does not increase, and the reflection mirror 7 does not come off.

Since it is only necessary to add the reinforcing member 25 made of a single wire as described above, it is possible to effectively prevent the reflection mirror 7 from falling off the mirror bracket 9 with a lightweight component.

Next, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those described in the conventional example and the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. The leaf spring 26 in the present embodiment has a bent portion 27 that is bent in a U-shape at an intermediate portion, and a locking piece 28 that is in contact with the outer surface of the mirror bracket 9 is bent at one end, and is formed at the other end. Is formed by bending a locking piece 29 that contacts the end face of the reflection mirror 7. The reinforcing member 25 is formed shorter than that used in the above-described first embodiment, is fitted into the bent portion 27 of the leaf spring 26, and extends between the leaf springs 26 on both sides. Have been.

In such a configuration, when a reaction force F is generated in the reflecting mirror 7 due to an external force such as an impact, the reaction force F
Acts on one leaf spring 26. However, since the leaf springs 26 on both sides are held by the reinforcing member 25,
Only one of the mirror brackets 9 does not bend and the amount of bending is extremely small or the mirror brackets 9 on both sides are not bent.
Bend simultaneously. Therefore, the gap between the mirror brackets 9 on both sides does not increase, and the falling off of the reflection mirror 7 is effectively prevented.

Next, a third embodiment of the present invention will be described with reference to FIGS. The same parts as those described in the conventional example and the first and second embodiments are denoted by the same reference numerals, and description thereof will be omitted. The reinforcing member 30 in the present embodiment is obtained by cutting and bending a plate-shaped member along the longitudinal direction, and has edges 31 bent at right angles on both side edges. At both ends, a pressing piece 33 having a screw cut 32 is bent downward. The pressing piece 33 is large enough to press the locking piece 28 of the leaf spring 26 from outside. The mirror bracket 9 has a screw hole 35 into which the fixing screw 34 is screwed.

Further, between the reflection mirror 7 and the reinforcing member 30, a vibration suppressing member 36 which comes into contact with the reflection mirror 7 and suppresses the generation of the vibration is mounted.

In such a configuration, when the reflecting mirror 7 is attached to the mirror bracket 9 using the leaf spring 26, the reinforcing member 30 is positioned from above so that the pressing piece 33 of the reinforcing member 30 extends along the outside of the mirror bracket 9. Attach. Then, the screw notch 32 of the holding piece 33 is inserted into the screw hole 35.
The holding piece 33 is fixed to the mirror bracket 9 by a fixing screw 34 in accordance with the condition. At this time, the outside of the locking piece 28 of the leaf spring 26 is also pressed by the pressing piece 33, and the leaf spring 26 is also substantially fixed to the mirror bracket 9.

In this state, an impact or the like acts on the reflection mirror 7.
Even if the longitudinal reaction force F is generated, the mirror brackets 9 on both sides are connected via the leaf spring 26 and the reinforcing member 30, so that the mirror brackets 9 on both sides are
Does not increase, thereby effectively preventing the reflection mirror 7 from falling off. The fixing of the reinforcing member 30 is not limited to the fixing screw 34, but may be a method such as fitting of a groove or caulking.

Further, since the vibration of the reflection mirror 7 is suppressed by the vibration suppressing member 36, it is possible to prevent the image from deteriorating due to external vibration during use. In practice, a part of the edge 31 of the reinforcing member 30 may be bent in the opposite direction so that the tip of the edge 31 contacts the reflection mirror 7.

In each of the above-described embodiments, only the reflection mirror 7 of the first scanning body 3 in the image reading apparatus shown in FIG. 7 has been described. The same applies to the respective mounting portions of the third and third reflection mirrors 12.

[0026]

According to the first aspect of the present invention, there is provided a reflecting mirror having a predetermined length for reflecting an original image, a pair of holding pieces provided at predetermined intervals to hold both ends of the reflecting mirror, A leaf spring that presses and fixes the reflection mirror to these holding pieces, and a reinforcing member that is stretched between the holding pieces on both sides and has strength in the tensile direction are provided. It is possible to reliably prevent the reflection mirror from being opened and prevent the reflecting mirror from falling off, and to use a lightweight wire or plate-like member as the reinforcing member.

According to a second aspect of the present invention, there is provided a reflecting mirror having a predetermined length for reflecting an original image, a pair of holding pieces provided at predetermined intervals so as to hold both ends of the reflecting mirror, and The holding piece includes a leaf spring that presses and fixes the reflection mirror to the holding piece, and a reinforcing member that has strength in the tensile direction and is stretched between the two leaf springs. Can be reliably prevented from opening, and the reflection mirror can be effectively prevented from falling off, and the reinforcing member has the effect that a lightweight wire or plate-like member can be used.

The third aspect of the present invention is characterized in that the reinforcing member according to the first or second aspect of the present invention is a wire, so that it has an effect that it can be manufactured lightweight.

According to a fourth aspect of the present invention, there is provided a reflecting mirror having a predetermined length for reflecting an original image, a pair of holding pieces provided at predetermined intervals so as to hold both ends of the reflecting mirror, and It is composed of a leaf spring that presses and fixes the reflection mirror to the holding piece, and a reinforcing member that is stretched between the holding pieces on both sides and has strength in the tensile direction and the bending direction. Can be reliably prevented from being opened, and the reflection mirror can be effectively prevented from falling off, and the reinforcing member can be made of a lightweight plate-like member.

According to a fifth aspect of the present invention, there is provided a reflecting mirror having a predetermined length for reflecting an original image, a pair of holding pieces provided at predetermined intervals so as to hold both ends of the reflecting mirror, and A leaf spring that presses and fixes the reflection mirror to a holding piece, a reinforcing member that is stretched between the holding pieces on both sides and has strength in a tensile direction and a bending direction, and abuts on the reflection mirror to reinforce the reflection mirror. Since the vibration suppression member is provided between the member and the member, the reinforcement member reliably prevents the gap between the holding pieces on both sides from opening, thereby effectively preventing the reflection mirror from falling off. It is possible to use a lightweight plate-shaped member, and it is possible to effectively prevent the vibration generated in the reflection mirror by the vibration suppressing member.

According to a sixth aspect of the present invention, since the reinforcing member according to the fourth or fifth aspect of the present invention is obtained by cutting and bending a plate-like member along a longitudinal direction, the reinforcing member is made lightweight. It has the effect of being able to.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a state where a reinforcing member is assembled.

FIG. 3 is an exploded perspective view showing a second embodiment of the present invention.

FIG. 4 is a perspective view of a state where a reinforcing member is assembled.

FIG. 5 is an exploded perspective view showing a third embodiment of the present invention.

FIG. 6 is a cross-sectional front view of a state where a reinforcing member and a vibration suppressing member are assembled.

FIG. 7 is a vertical sectional side view showing a general structure of a conventional image reading apparatus.

FIG. 8 is a front view showing a state where a reflection mirror is held.

FIG. 9 is a front view showing a state in which a reflecting mirror is dropped by an impact.

[Explanation of Signs] 7 leaf spring 9 holding piece 18 leaf spring 25 reinforcing member

Claims (6)

[Claims] 1. A reflecting mirror having a predetermined length for reflecting a document image, a pair of holding pieces provided at predetermined intervals so as to hold both ends of the reflecting mirror, and the reflecting mirror provided on these holding pieces. And a reinforcing member having a strength in a tensile direction which is stretched between the holding pieces on both sides. 2. A reflecting mirror having a predetermined length for reflecting an original image, a pair of holding pieces provided at predetermined intervals so as to hold both ends of the reflecting mirror, and the reflecting mirror being provided on these holding pieces. And a reinforcing member having a strength in a tensile direction which is stretched between the leaf springs on both sides. 3. The reflection mirror holding device according to claim 1, wherein the reinforcing member is a wire. 4. A reflecting mirror having a predetermined length for reflecting an original image, a pair of holding pieces provided at predetermined intervals so as to hold both ends of the reflecting mirror, and the reflecting mirror being provided on these holding pieces. And a reinforcing member having a strength in a tensile direction and a bending direction which is stretched between the holding pieces on both sides. 5. A reflecting mirror having a predetermined length for reflecting a document image, a pair of holding pieces provided at predetermined intervals so as to hold both ends of the reflecting mirror, and the reflecting mirror being provided on these holding pieces. A leaf spring for pressing and fixing, a reinforcing member that is stretched between the holding pieces on both sides and has strength in a tensile direction and a bending direction, and is provided between the reflecting mirror and the reinforcing member in contact with the reflecting mirror. A reflection mirror holding device comprising: a vibration suppressing member provided. 6. The reflection mirror holding device according to claim 4, wherein the reinforcing member is formed by cutting and bending a plate-like member along a longitudinal direction.