JP3161574B2 - Lamp support structure for copier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lamp supporting structure for a copying machine, and more particularly to a lamp supporting structure for a copying machine in which the type of a lamp can be easily changed by changing the position of a lamp supporting bracket.

[0002]

2. Description of the Related Art Generally, a copying machine changes the configuration of a light source used in a copying machine according to the size of a document to be read. For example, a copier for A4 originals uses a light source composed of one halogen lamp and one reflector placed facing the same, while a copier for B4 originals uses an A4
A light source composed of two halogen lamps longer than that used in a document copying machine is used.

[0003] These halogen lamps and reflectors are individually attached to a lamp holding member (bracket) using dedicated fixing members and fixed to the main body, or are directly mounted to the main body using fixing members. ing.
In addition, these fixing members are fastened with screws, and further,
A projection for the rotation stop and a hole into which the projection is fitted are provided on the fixing member or the main body.

Therefore, depending on the type of lamp, the presence or absence of a reflector, or the type of light source formed by a combination of these, a fixing member and a bracket having a special shape corresponding to each case are prepared. I have.

[0005]

By the way, the above-mentioned conventional lamp supporting structure of the copying machine has a case where a light source is formed by two halogen lamps and a case where a light source is formed by one halogen lamp and one reflector. The lamp support members are different,
In addition, the body case also needs to correspond to the configuration of the light source. For this reason, there is a problem that there are many types of parts and the parts cost is high. On the other hand, halogen lamps,
Each requires a fixing member to attach the reflector,
Furthermore, since screws and the like for fixing these fixing members are required, there is a problem that the number of parts is large and assembly is complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and has as its object to provide a lamp supporting structure of a copying machine in which a lamp can be easily mounted even when a different type of lamp is used as a light source. And

[0007]

In order to achieve the above object, the present invention provides a lamp support structure for mounting a long lamp to a main body of an image reading unit, wherein the main body has different types of lamps having different lengths. A plurality of positioning grooves corresponding to the lamps are formed, and the lamp is supported from both ends by a pair of lamp brackets having a support piece for supporting an end of the elongated lamp and a protruding portion that can be inserted into the positioning groove. In addition, the projection is fitted into the positioning groove corresponding to the length of the lamp.

[0008]

According to the present invention, since the lamp is supported by the support pieces of the bracket from both ends, even if the type of the lamp is different, the lamp can be supported by the same bracket by changing the position of the bracket. Further, the bracket can be attached to a predetermined position of the main body according to the type of the lamp supported. On the other hand, the lamp bracket can form a light source unit with one type of bracket in both cases of supporting two lamps and supporting one lamp and a reflector. Further, since the reflector can be supported by inserting both ends into the groove formed in the bracket, the reflector can be easily fixed. In this manner, simplification of assembly and common use of parts are achieved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a lamp bracket for a copying machine according to the present invention will be described below in detail with reference to the accompanying drawings.
FIG. 1 is a schematic sectional view showing the internal structure of an image reading unit of a copying machine, and FIG. 2 is a plan view of FIG. The image reading unit shown in FIG. 1 has a configuration in which a light source unit 20, a lens unit 30, and a light transmission optical system 40 are housed inside a main body 10. In FIG. 1, the right side of the main body 10 is partitioned by a light shielding cover 102, The light source unit 20 is disposed above, and the light transmission optical system 40 is disposed below. On the other hand, a lens unit 30 is disposed on the left side of the main body 10, and a lens cover 308 is provided on an upper surface thereof. The light shielding cover 102
Is formed with a rectangular slit 104 that is long and parallel to the halogen lamp 206, and prevents unnecessary light from entering the optical system inside the main body.

The light source section 20 is composed of a lamp bracket 204 provided on the light-shielding cover 102, halogen lamps 206, 206 held by the lamp bracket 204, and a platen glass 208 covering an upper portion thereof. In addition,
As shown in FIG. 2, the halogen lamp 206 has a long shape, and two lamps of the same shape are provided in parallel at a predetermined distance.

FIG. 3 is an enlarged view of the right end portion of FIG. 2, and FIG. 4 is a sectional view taken along the line 4-4 in FIG. The end of the halogen lamp 206 is connected to the electrode portion 20 indicated by a dotted line in FIG.
7 are provided, and this electrode portion is formed with grooves 207b and 207b 'as shown in FIG. FIG. 5 is a perspective view showing a state in which two halogen lamps 206 are supported by the lamp bracket 204, and FIG. 6 is a front view of the lamp bracket 204. Lamp bracket 2
04 has a symmetrical shape, and the protrusion 212,
And lamp support pieces (guides) 214, 214 'and a mirror insertion groove 216 are formed on the left and right, respectively. The two halogen lamps 206 are provided with grooves 207b and 207 in the electrode section.
The brackets 214 are supported by the brackets 204 by fitting the guides 214, 214 ′ of the brackets into b ′.

Returning to FIGS. 3 and 4, the vertical wall surfaces 10b and 10c of the main body 10 have straight grooves 12 perpendicular to the wall surface.
A, 12A ', 12B, 12B' are formed, and the projections 212, 212 of the bracket are inserted along the grooves 12A, 12A 'or 12B, 12B'. The bracket 204 supporting the two halogen lamps 206 has the projections 212, 212 fitted in the linear grooves 12A, 12A 'of the main body 10, and is fixed to the main body 10 with bolts 94. At this time, the light shielding cover 102 is located below the lamp bracket 204, and the lamp bracket 2
04 is fixed with bolts 94, so that the light shielding cover 1
02 can also be fixed at the same time. The platen glass 208 is provided on the upper surface of the bracket 204, and is fixed between the bracket and a fixed spring (not shown) that urges toward the upper surface of the bracket.

When two halogen lamps are used as the light source as described above, the light source unit supporting the two lamps on the bracket is inserted in accordance with the grooves 12A and 12A 'of the main body, as will be described later. When the halogen lamp 206 'shorter than the halogen lamp and the reflector 252 are used as a light source unit (FIGS. 7 to 9).
Inserts the bracket projections 212 in alignment with the grooves 12B, 12B '. In the above description, only the right portion of FIG. 2 has been described. However, the configuration of the left portion is the same, and a description thereof will be omitted.

Next, a case where the light source unit is formed by combining one lamp and a reflector will be described. FIG. 7 shows a case where the configuration of the light source in FIG. 3 is replaced by a halogen lamp 206 'and a reflector 252, and FIG.
It is sectional drawing in alignment with line 8. FIG. 9 is a perspective view showing a state where the halogen lamp 206 ′ and the reflector 252 are supported by the lamp bracket 204. Note that the same or similar members in the description of FIGS. 1 to 6 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 7, a halogen lamp 206 'shorter than the halogen lamp 206 of FIG.
It is supported by the bracket 204 and attached to the main body 10. Guides 214 and 21 provided on the bracket 204
4 ′ is fitted into the grooves 207, 207 ′ of the lamp to support the halogen lamp 206, and both ends of the reflection plate 252 are inserted into the grooves 216 formed in the bracket 204 while being sandwiched between the brackets from both sides. Reflector 252
I support.

The bracket 204 includes projections 212 and 21.
2 into the straight grooves 12B, 12B 'of the main body 10,
It is fixed to the main body with bolts 94. The grooves 12A, 12A 'and 12B, 12B' formed in the main body 10 are provided on the assumption that the mounting positions of the brackets are changed in advance. The mounting position of 204 is determined. For this reason, even if the mounting position of the bracket changes according to the configuration of the light source unit, it can be easily mounted on the main body.

In the above embodiment, the lamp bracket is formed in a symmetrical shape, and the left and right brackets can be shared by one kind of bracket when a pair of brackets is used. It is also conceivable to provide two types of brackets separately for the left bracket and the right bracket. In FIG. 1, below the gap between the two halogen lamps 206, 206, an elongated first mirror M1 held by a mirror holding member (bracket) 42 and a fixed spring 44 is provided with the halogen lamp 206. They are arranged in parallel. Fixed spring 44
Is attached to the main body 10 with screws 48a.
A rotation stopper 50a is provided so that the fixed spring 44 does not rotate due to the rotation torque of the screw during mounting. Mirror M1
The back surface is pressed against the inclined portion 42b of the bracket 42 by the urging force of the fixed spring 44, and is held at a predetermined angle.

The second mirror M2 is held at a predetermined angle near the center of the main body 10 in FIG. 1 by a mirror holding member (bracket) 52 and a fixed spring 54, and is attached to the main body 10 by screws 48b and rotation stoppers 50b. Have been. The third mirror M3 has a lower edge near the vertical wall surface 10b at the right end of the main body 10 in FIG.
d and the surface of the mirror (reflective mirror surface)
The bracket 62 abuts against the inclined surface 62b, and is pressed down and fixed by a U-shaped spring 64 from the back.

A female screw (not shown) for attaching the light-shielding cover 102 is formed on the main body 10, and the light-shielding cover 102 is formed by a to-be-clamped portion 64 b formed on the U-shaped spring 64.
Is fixed to the female screw portion with bolts while being sandwiched between the bracket and the upper portion 62c of the bracket. In addition, the mounting by the bolts is performed by two bolts 94 at both right and left ends in FIG. The mirror M3 has a long shape, and brackets 62, 62 and U-shaped springs 64, 64 are provided at two positions near both ends in the longitudinal direction of the mirror in order to hold the mirror M3.

Returning to FIG. 1, the lens unit 30 includes a lens bracket 302, a lens 304, a CCD line sensor 306, and a lens cover 308. A lens blocker 318 is formed as an integral part of the lens cover 308. I have. The lens blocker 318 is provided so as to be bent vertically downward at the distal end of the lens cover 308, and blocks the light path near the center line in the upper portion of the horizontally long light beam before entering the lens 304. Plays a role. In particular,
The lens blocker 318 and the lens cover 308 are integrally formed of plastic, and the blocker 318 is particularly treated to prevent light transmission.

A lens bracket 302 is disposed on the bottom surface of the lens unit 30. A lens 304 is held on the lens bracket 302, and a CCD line sensor 306 is fixed to a bracket vertical surface 302b behind the lens 304. ing. The CCD line sensor 306 is connected to a laser printer (not shown).
The content of the read image is printed.

The lens cover 308 is attached to the upper surface of the bracket 302 so as to cover the upper side of the lens 304, and the right side of the lens cover 308 in FIG.
4 is a light shielding cover 102).
It is built on top of. Further, the lens unit 30 is integrally attached to the main body 10 so as to be movable back and forth along the optical axis.

In the image reading unit of the copying machine constructed as described above, in FIG. 1, when the original 70 to be read is set on the original platen 72 with the reading surface down, the original 70 And placed on the platen glass 208. The original 70 on the platen glass 208 is scanned by the original feeding means (not shown) in the direction of arrow A while being irradiated with the light from the halogen lamp 206, so that the entire original surface is scanned.

The light illuminated on the original 70 is reflected on the original surface, and the slit 104
And reaches the long first mirror M1 provided vertically below the slit. The slit passes a part of the reflected light and blocks other light.
The light that has passed through becomes a luminous flux that is long in the same direction as the lengthwise direction of the halogen lamp 206.

The first mirror M1 is attached to the bottom surface of the main body 10 at an angle of 45 degrees, and the light beam is reflected by the mirror M1.
And the optical path is bent in the horizontal direction. Further, the light beam is reflected by a second mirror M2 disposed at a slight inclination from 90 degrees, irradiates a third mirror M3 on the right side in FIG. 1, and the light path is bent in a horizontal direction by the mirror M3. After that, the lens 30 is
The light amount distribution of the light beam incident on 4 is made uniform, and an image is formed on the light receiving surface of the CCD line sensor 306 via the lens 304.

[0026]

As described above, according to the lamp supporting structure of the copying machine according to the present invention, even if the type of lamp is different, the lamp is supported by the same pair of brackets by changing the position of the bracket. be able to. Thereby, even in the case of different light source configurations, the main body and the bracket can be used in common, so that parts can be shared.

On the other hand, in both cases of supporting two lamps when forming the light source unit and supporting one lamp and the reflecting plate, the light source unit can be formed by one kind of bracket. This eliminates the need for a fixing member or a screw for supporting the lamp or the reflector, but also simplifies the assembling operation, thereby reducing the number of parts and the number of parts and greatly reducing costs.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an internal structure of an image reading unit of a copying machine;

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged view of a right end portion of FIG. 2;

FIG. 4 is a sectional view taken along line 4 線 4 of FIG. 3;

FIG. 5 is a perspective view showing a state in which two halogen lamps 206 are supported by a lamp bracket 204.

FIG. 6 is a front view of a lamp bracket 204;

FIG. 7 is a diagram when a lamp 206 'and a reflector 252 are used as the light source in FIG.

FIG. 8 is a sectional view taken along line 8-8 in FIG. 6;

FIG. 9 is a perspective view showing a state in which a halogen lamp 206 ′ and a reflecting mirror 252 are supported by a lamp bracket 204.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Body 12A, 12A'12B, 12B '... Positioning groove 204 ... Lamp bracket 206 ... Halogen lamp 207 ... Lamp electrode part 214, 214' ... Lamp support piece (guide) 216 ... Reflection plate support groove 252 ... Reflection plate

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G03B 27/54 H04N 1/04 101 F21V 19/00

Claims (2)

(57) [Claims] 1. An image reading unit using a long lamp.
In the lamp support structure attached to the main body, a plurality of types corresponding to the types of lamps having different lengths are provided on the main body.
A positioning groove is formed, and a support piece that supports an end of the elongated lamp and a protrusion that can be inserted into the positioning groove.
The lamp by a pair of lamp brackets having
While supporting from both ends, the protrusion is
Lula pump support structure to <br/> characterized thereby fitted into the positioning groove corresponding to the length. 2. The method according to claim 1, wherein the pair of lamp brackets includes:
To be able to support two lamps side by side and in parallel,
Each lamp bracket as viewed from the longitudinal direction of the lamp
While the support pieces are formed on both left and right sides ,
By changing one of the two lamps to a reflector
On each of the left and right sides of each lamp bracket
Each end portion of the reflector are made form a groove which is supported by being inserted, before Kisayu both sides of the support piece Therefore two lamps is supported, or on one of the left and right supporting pieces single lamp is supported, run-<br/> flop support structure of claim 1, reflector on the opposite side of the groove and the support piece to which the lamp is supported is characterized in that it is inserted into and supported.