JPH08122938A - Lamp supporting structure of copying machine - Google Patents

Abstract

PURPOSE: To provide a lamp supporting structure of copying machine capable of easily attaching a lamp, even if a different kind of lamp is used as the light source. CONSTITUTION: The lamps 206 are supported by the supporting pieces (not shown by the figure) of brackets 204 from both ends, so that even if the kind of lamp 206 is different, the lamps 206 are supported by a pair of the brackets 204 by changing the positions of the brackets 204. On the other hand, the projecting parts of the brackets 204 supporting the lamps 206 are fitted into positioning grooves l2A and l2A' or l2B and l2B' provided on the side of a main body 10, to be attached, so that even if a different kind of lamp 206 is attached, the same main body 10 can be used and moreover, the attachment is made easy. Further, when a reflection plate not shown by the figure is used together with the lamp 206 for the light source, the reflection plate is supported in such a manner that both end edge parts are inserted into a groove (not shown by the figure) formed on the bracket 204, to make the fixing of the reflection plate easy as well.

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 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 structure of a light source used in the copying machine according to the size of a document to be read. For example, an A4 original copying machine uses a light source composed of one halogen lamp and one reflecting plate arranged facing the halogen lamp, while a B4 original copying machine uses an A4 original light source.
It uses a light source consisting of two halogen lamps, which are longer than those used in document copiers.

Each of these halogen lamps and reflectors is individually attached to a lamp holding member (bracket) using a dedicated fixing member and fixed to the main body, or is directly attached to the main body using a fixing member. ing.
Also, these fixing members are fastened with screws,
A rotation stopper protrusion and a hole into which the rotation stopper is fitted are provided in the fixing member or the main body.

Therefore, depending on the type of lamp, the presence / absence of a reflection plate, or the type of light source formed by a combination thereof, the fixing member and the bracket are also prepared in a special shape corresponding to each case. There is.

[0005]

By the way, in the above-mentioned conventional lamp supporting structure of the copying machine, there are a case where the light source is formed by two halogen lamps and a case where the light source is formed by one halogen lamp and one reflecting plate. So, the lamp support member is different,
Also, the main body case is required to be suitable for each light source configuration. Therefore, there is a problem that there are many kinds of parts and the parts cost is high. On the other hand, halogen lamps,
Each requires a fixing member to attach the reflector,
Further, 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.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a lamp supporting structure of a copying machine in which the lamp can be easily attached even when the type of the lamp used for the light source is different. And

[0007]

In order to achieve the above object, the present invention provides a lamp support structure of a copying machine which supports a long lamp from both ends, and a support for supporting the end of the lamp on a lamp bracket. A pair of the brackets can support both ends of the lamp, and the bracket can be fitted into a positioning groove on the main body side according to the type of the lamp.

[0008]

According to the present invention, since the lamp is supported by the support pieces of the bracket from both ends, it is possible to support the same bracket by changing the position of the bracket even if the kind of the lamp is different. Further, the bracket can be attached to a predetermined position of the main body depending on the type of the lamp supported. On the other hand, the lamp bracket can form a light source unit with one type of bracket, regardless of whether it supports two lamps or 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 fixed easily. In this way, simplification of assembly and commonization of parts are achieved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a lamp bracket for a copying machine according to the present invention will be described in detail below with reference to the accompanying drawings.
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 arranged above, and the optical transmission optical system 40 is arranged below. On the other hand, the lens unit 30 is arranged on the left side of the main body 10, and the lens cover 308 is provided on the upper surface thereof. The light shielding cover 102
A rectangular slit 104, which is long in parallel with the halogen lamp 206, is formed on the inner surface of the main body to prevent extra light from entering the optical system inside the main body.

The light source section 20 comprises a lamp bracket 204 provided on the light-shielding cover 102, halogen lamps 206 and 206 held by the lamp bracket 204, and a platen glass 208 covering the upper portions of these. In addition,
As shown in FIG. 2, the halogen lamps 206 have an elongated shape, and two halogen lamps 206 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 line 4-4 of FIG. The end portion of the halogen lamp 206 has an electrode portion 20 shown by a dotted line in FIG.
7 are provided, and the electrodes are provided with grooves 207b and 207b 'as shown in FIG. FIG. 5 is a perspective view showing a state where 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 bilaterally symmetrical shape, and has a protrusion 212,
And lamp support pieces (guides) 214, 214 'and mirror insertion grooves 216 are formed on the left and right sides, respectively. The two halogen lamps 206 are provided with grooves 207b, 207 in the electrode portion.
It is supported by the bracket 204 by fitting the guides 214, 214 'of the bracket into b'.

Returning to FIG. 3 and FIG. 4, the vertical wall surfaces 10b and 10c of the main body 10 have straight grooves 12 which are vertical along the wall surface.
A, 12A ', 12B, 12B' are formed, and the protrusions 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 protrusions 212, 212 fitted into the linear grooves 12A, 12A 'of the main body 10 and fixed to the main body 10 with the bolts 94. At this time, there is the light-shielding cover 102 below the lamp bracket 204, and the lamp bracket 2
By fixing 04 with bolts 94, 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 by being sandwiched between the platen glass 208 and the bracket by a fixing spring (not shown) that urges the bracket 204 toward the upper surface of the bracket.

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

Next, a case where the light source unit is formed by combining one lamp and a reflecting plate will be described. FIG. 7 is a diagram in the case where the configuration of the light source is replaced with the halogen lamp 206 ′ and the reflection plate 252 in FIG. 3, and FIG.
It is sectional drawing which follows the 8 line. Further, FIG. 9 is a perspective view showing a state where the halogen lamp 206 ′ and the reflection plate 252 are supported by the lamp bracket 204. The same or similar members in the description of FIGS. 1 to 6 are designated by the same reference numerals, and the 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 in 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 and sandwiched by the brackets from both sides. Reflector 252
I support.

The bracket 204 includes the protrusions 212 and 21.
2 into the straight grooves 12B, 12B 'of the main body 10,
It is fixed to the body with bolts 94. The grooves 12A, 12A 'and 12B, 12B' formed in the main body 10 are provided in advance on the assumption that the mounting position of the bracket will be changed. By inserting the protrusion 212 provided in the bracket into this groove, the bracket The mounting position of 204 is fixed. Therefore, even if the mounting position of the bracket is changed according to the configuration of the light source unit, the bracket can be easily mounted on the main body.

In the above embodiment, the lamp bracket is formed in a bilaterally symmetrical shape, and when the brackets are used in a pair, the left and right brackets can be shared by one type of bracket. It is also possible to provide two types of brackets separately for the left side bracket and the right side bracket. Now, in FIG. 1, below the gap between the two halogen lamps 206, 206, the elongated first mirror M1 held by the mirror holding member (bracket) 42 and the fixing spring 44 is the halogen lamp 206. They are arranged in parallel. Fixed spring 44
Is attached to the main body 10 with a screw 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 of the bracket is pressed against the inclined portion 42b of the bracket 42 by the biasing force of the fixed spring 44, and is held at a predetermined angle.

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

An unillustrated female screw portion for attaching the light shielding cover 102 is formed on the main body 10, and the light shielding cover 102 is provided with a U-shaped spring 64 to be clamped portion 64b.
Is clamped between the upper part 62c of the bracket and the female screw part with a bolt. The bolts are attached by two bolts 94, 94 at the left and right ends in FIG. The mirror M3 has a long shape, and in order to hold it, brackets 62, 62 and U-shaped springs 64, 64 are provided at two locations near both ends in the mirror longitudinal direction.

Returning to FIG. 1 again, the lens unit 30 is composed of a lens bracket 302, a lens 304, a CCD line sensor 306, and a lens cover 308, and a lens blocker 318 is formed integrally with the lens cover 308. There is. The lens blocker 318 is provided so as to be bent vertically downward at the tip of the lens cover 308, and blocks the path of light in the upper part of the horizontally elongated light flux and near the center line before entering the lens 304. Playing a role. In particular,
The lens blocker 318 and the lens cover 308 are integrally molded of plastic, and the blocker 318 portion is subjected to a treatment to prevent light transmission.

The lens bracket 302 is arranged on the bottom surface of the lens unit 30, the lens 304 is held on the lens bracket 302, and the CCD line sensor 306 is fixed to the 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 in the right part of the lens cover 308 in FIG. 1 (from the tip portion where the lens blocker 318 is formed to the lens 30).
4 is a light-shielding cover 102.
It is built in under the overlap. 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 table 72 with the reading surface facing down, the original 70 is indicated by the arrow A by the rotation of the roller 74. And is placed on the platen glass 208. The document 70 on the platen glass 208 is scanned by being fed with light from the halogen lamp 206 and further fed in the direction of arrow A by a document feeding means (not shown) so as to scan the entire document surface.

The light applied to the original 70 is reflected by the surface of the original, and the slit 104 formed on the light-shielding cover 102.
To reach the elongated first mirror M1 provided vertically below the slit. The slit allows a part of the reflected light to pass through and blocks the other light.
The light passing through becomes a long zonal luminous flux 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.
It is reflected by and the optical path is bent in the horizontal direction. Further, the luminous flux is reflected by the second mirror M2 which is arranged at a slight inclination from 90 degrees, is irradiated on the third mirror M3 on the right side of FIG. 1, and is further bent in the horizontal optical path by the mirror M3. After that, the lens 30 is removed by the lens blocker 318.
The light amount distribution of the light beam incident on the light source 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, the lamps are supported by the same pair of brackets by changing the positions of the brackets even when the kinds of the lamps are different. be able to. With this, 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 and supporting one lamp and a reflecting plate when forming the light source unit, one type of bracket can be used. This eliminates the need for a fixing member, screws or the like to support the lamp or the reflecting plate, and facilitates the assembling work, thus reducing the types of parts and the number of parts, which greatly contributes to cost reduction.

[Brief description of 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.

4 is a sectional view taken along line 4-4 of FIG.

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 a light source in FIG.

FIG. 8 is a sectional view taken along line 8-8 of FIG.

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]

 10 ... Main body 12A, 12A '12B, 12B' ... Positioning groove 204 ... Lamp bracket 206 ... Halogen lamp 207 ... Lamp electrode part 214, 214 '... Lamp support piece (guide) 216 ... Reflector support groove 252 ... Reflector

Claims (2)

[Claims] 1. In a lamp supporting structure of a copying machine, which supports a long lamp from both ends, a lamp bracket is provided with a supporting piece for supporting an end portion of the lamp, and the bracket can support both ends of the lamp in a pair. The lamp support structure of the copying machine, wherein the bracket can be fitted into the positioning groove on the main body side according to the type of the lamp. 2. Each of the brackets has a support piece for supporting an end portion of the lamp and a groove for supporting the end portion of the reflection plate inserted therein, the groove being formed on the left and right sides. Two lamps are supported by the left and right support pieces, or one lamp is supported by either of the left and right support pieces, and the reflector is inserted and supported in the groove on the side opposite to the support piece on which the lamp is supported. The lamp support structure for a copying machine according to claim 1, wherein: