JPS6223854B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an illumination device used in a document scanning device, particularly a document scanning device such as a facsimile machine having a scanning head that reciprocates at high speed. The present invention relates to a lighting device that has sufficient mechanical durability when moving in parallel with the high-speed reciprocating motion of the lighting device, is lightweight and compact, and can be easily replaced.

As is well known, the above-mentioned facsimile device is
The calligraphic information read on the transmitting side is exchanged into electrical signals, which are sent to a remote location via a telephone line, etc., and the receiving side faithfully reproduces the transmitted calligraphic information. It is widely used as a device.

Conventionally, the following illumination devices have been employed in the document scanning device of this facsimile machine.

First, before explaining the above device, a lamp used in the above lighting device will be explained with reference to FIG.

In FIG. 1, a lamp 1 consists of a main body 1a made of a transparent material such as glass, a filament 2 inserted into the main body, and an insulator 3 with terminals attached to both ends of the lamp. This glass body 1a is filled with an active gas such as halogen gas and is called a halogen lamp. In this lamp 1, the light emitting part 2a of the filament 2 inserted into the lamp body 1a and the convex part formed by welding after filling halogen gas in the main body 1a, in other words, the chip 1b, are located at the center in the longitudinal direction of the lamp. They are located in each.

A conventional example of a document illuminating device equipped with such a lamp 1 is shown in FIGS. 2 to 4. In each of the above figures, members that are the same as each other and members that are the same as those in FIG.

In FIG. 2, the lamp 1 is arranged so that the tip 1b is on the opposite side to the target glass 4 provided facing the document transport path, and is spaced apart from the reflecting mirror. This is to prevent the chip 1b of the lamp 1 from being destroyed by contact with the reflecting mirror 5 for reflecting the irradiated light from the lamp 1 toward the target glass. The lamp 1 is ready to be supplied with power by being attached to a terminal having its terminal on the socket side (not shown). Note that the terminals on the lamp side and the terminals on the socket side each have a self-returning property that allows good contact to be made at all times through a focusing force in a certain direction by an elastic body or the like.

FIGS. 3 and 4 show how the lamp is installed in the document illumination device. That is,
In FIG. 3, the lamp 1 has a terminal on an insulator 3 that is fitted into a terminal 6a of a socket 6 fixed to a document scanning device (not shown), and the insulator 3 is attached to a flexible retainer. A band 7 is fitted. This presser band 7 is fixed to the socket 6 through screws 8, thereby fixing the lamp 1. The lamp 1 is prevented from rotating and is firmly fixed by the degree of tightening of the screw 8 to the presser band 7.

Further, in FIG. 4, the lamp 1 has a planar cutout 3a provided in an insulator 3 attached to both ends thereof. The lamp 1 is integrally attached to the socket 6 by fitting the terminals of the insulator 3 into the terminals of the socket 6. Lamp 1 attached to socket 6
A notch 3a provided in the insulator 3 is pressed by a pressing portion 9a of a flexible pressing plate 9 fixed to the socket 6 via screws 8.

The lamp 1 is prevented from rotating unnecessarily by the press plate 9 pressing the notch 3a of the insulator 3.

The above-mentioned document illumination devices have been used in the past, but in these conventional document illumination devices, the chip of the lamp body and the light emitting part of the filament are in the same position with respect to the longitudinal direction of the lamp. Therefore, the effective use of the light emitted from the light emitting part of the filament is hindered (the lamp shown in FIG. 1). A distance must be provided between the reflecting mirror and the light emitting section, which deteriorates the illumination efficiency of the reflecting plate (conventional example shown in FIG. 2).

In addition, the self-resetting action of the terminals on the insulator of the lamp and the terminals on the socket, that is, the action of orienting the terminals on the insulator side and the socket side to the best position for contacting each other, is caused by the fixing member (the first Since this is suppressed by a presser band in FIG. 3 and a pressing plate in FIG. 4, a slight positional deviation between the two terminals will cause a contact failure between the two terminals. or,
If the terminals are misaligned, the terminals will not be able to absorb the inertial force that occurs when switching the lamp's reciprocating motion, and as a result,
There is a risk of damage to the insulator and lamp body. Furthermore, since there are many parts to be installed when replacing the lamp, it becomes cumbersome to replace the lamp. Moreover, the shape of the insulator for mounting the lamp must be set very precisely, which has various disadvantages such as high processing costs.

Therefore, the present invention uses a lamp having a chip, and provides a notch whose longitudinal direction is the moving direction of the lamp in a reflecting mirror for directing the irradiated light from the lamp toward the contact glass. A document illumination device in which the tip of the lamp is supported by protruding from the lamp body, and the tip and the light emitting portion of the filament in the lamp body are placed at different positions in the longitudinal direction of the lamp, thereby eliminating the drawbacks of conventional devices of this type. The purpose is to provide equipment. The present invention will be explained below with reference to embodiments shown in the drawings.

FIG. 5 shows the main parts of the document illuminating device of the present invention.

Reference numeral 10 in the figure indicates an illumination lamp holder attached to a document reading head of a document scanning device to be described later. Lamp sockets 11 and 12 are attached to both sides of this holder 10 in upper and lower stages, respectively. This socket is made of a flexible member and is adapted to elastically hold the lamp, which will be described later.

In the sockets 11 and 12, halogen lamps 13 and 14 have insulators 13a and 14 at both ends.
4a terminal can be attached.

These lamps 13 and 14 are made of chips 13b and 14.
b, and the light emitting parts 15a of the filaments 15 and 16,
16a, and the chips 13b and 14b face a reflecting mirror, which will be described later.

On the lamp mounting side 10a of the holder 10,
A reflecting plate 17 having a mirror surface is fixed.
This reflector 17 is connected to the two lamps 13 and 14.
It has a substantially C-shape that can cover the vertical direction and the back side of the holder, and a scanning light passing section 17 is located in the center thereof, that is, between the lamps.
A is provided.

Now, the upper and lower wings 17b and 17c of the reflecting mirror 17
In the lamps 13 and 14, cutouts 18 and 19 whose longitudinal sides extend in the longitudinal direction of the lamps are provided at positions facing the chips 13b and 14b of the lamps 13 and 14, respectively. It stands out.

The notches 18 and 19 are long in the longitudinal direction of the lamp, that is, in the direction of movement of the lamp, and are long enough to allow the tip of the lamp to move, at least depending on the flexibility of the socket. It is set longer than the length.

The document illuminating device having the main parts configured as described above is used by being attached to a reading head of a document scanning device.

Now, referring to FIG. 6, a document scanning device equipped with the document illuminating device will be briefly described.

A reading head 2 is mounted on a carrier 22 that is slidably supported by immovable guide shafts 20 and 21 that are arranged parallel to each other within the machine housing of the facsimile machine.
3. Recording heads (not shown) are each fixed.

The reading head 23 has, at its front end,
Holder 10 Reflector 17 and Lamps 13, 14
A document illumination device I consisting of
6 are provided respectively.

In front of the reading head (to the left in the figure) is a document transport path formed by a pair of document rollers 27. At a position facing the reading head in this document conveyance path, a contact glass 28 and its support plate 29 are located near the reading head, and are opposed to the contact glass 28 with a sufficient gap for the document O to pass through. Document holding plates 30 are arranged at the respective positions.

In the document scanning device of the facsimile apparatus configured as described above, the document O is fed to a position where the contact glass 28 is disposed and then stopped, and is placed in a position where it can be read and scanned by the reading head 23. When the document O is placed in a position where it can be scanned, the lamp 13, which is provided on the carrier 22,
14 lights up, and at the same time the carrier 22 starts reciprocating, and the solid state sensor 26 is illuminated by the light from both lamps through the imaging lenses 24 and 25.
Original reading is performed using the self-scanning function of the scanner. The original is fed intermittently until all reading of the original is completed.

According to the present invention described above, since the chip included in the lamp does not have to face the light emitting part of the filament inserted into the lamp, it is possible to effectively utilize the light irradiated from the light emitting part of the lamp. Since the lamp can be placed without moving the lamp chip away from the reflector, the reflection efficiency of the reflector can be improved, in other words,
The advantage is that there is no need to vary the optical path length.

Furthermore, by fitting and protruding the chip included in the lamp into the notch provided in the reflector plate, it is possible not only to prevent the lamp from rotating, but also to prevent the lamp from rotating. Since the inertial force applied to the lamp can be absorbed by the self-returning property of the socket, the above inertial force is not applied to the lamp insulator or the lamp body, thereby preventing damage to the lamp. Effects can be obtained. Furthermore, when replacing the lamp, the lamp can be replaced very easily by simply engaging and disengaging the lamp from the socket. It should be noted that, of course, the cutout of the reflector is provided at a position where the reflector does not participate in illumination.

In addition, this notch is not limited to the type, as long as the lamp chip can protrude and the same effect as the above-mentioned embodiment can be expected.
Of course, as shown in FIG. 7, it may be in the form of a long hole.

Furthermore, the reflector used in the lighting device of the present invention can be applied not only to lamps with one light emitting part in the filament of the lamp, but also to lamps with multiple light emitting parts. This can be applied by changing the type of notch. (Refer to Figure 8) The lighting device of the present invention not only arranges the illumination lamps so that the moving direction of the carrier is longitudinal as shown in the above embodiment, but also arranges the lighting lamps so that the moving direction of the carrier is longitudinal. Of course, they may be arranged at right angles.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of an illumination lamp conventionally used in a document illumination device, FIGS. 2 to 4 are schematic diagrams showing conventional examples of the document illumination device, and FIG. 5 is an embodiment of the present invention. 6 is a side sectional view showing an example of a document scanning device to which one embodiment of the present invention is applied, and FIGS. 7 and 8 are schematic diagrams showing other embodiments of the present invention. be. 1, 13, 14... lamp, 1b, 13b, 1
4b... Chip, 17... Reflector, 18, 19...
...Notch, 1, 15, 16...Filament, 1
a, 15a, 16a... Light emitting part.

Claims (1)

[Scope of Claims] 1. A document illumination device installed in a reciprocating document scanning device, wherein both ends are attached to a holder fixed to the scanning device and a socket attached to the holder, and the surface is filled with gas. What is claimed is: 1. A document illumination device comprising: an illumination lamp having an illumination tip; and a reflecting mirror fixed to the holder at the back of the lamp, the reflecting mirror being provided with a notch through which the tip of the lamp protrudes. 2. The document illumination device according to claim 1, wherein the direction of the cutout of the reflection plate is aligned with the moving direction of the scanning device. 3. The original illumination device according to claim 1, wherein the chip included in the lamp and the light emitting portion of the filament inserted into the lamp are located at different positions.