JPH07209766A - Illuminating lamp holding device - Google Patents

Abstract

PURPOSE:To facilitate the detachment of an illuminating lamp by forming an upward projected part at an upper edge on the tip side from the base of a lamp terminal. CONSTITUTION:The illuminating lamp 3 constituting an exposure scanning system and consisting of a halogen lamp is interposed between lamp terminals 4 and 5 whose both ends are made of an elastic plate. The lamp terminals 4 and 5 are constituted of the base 4a screwed and fixed at one end of a 1st moving frame 2 and a supporting part 4b bent at a right angle from the base 4a. A projection (d) attachably/detachably fitted in a recessed connection part 3a at one end of the lamp 3 is formed to be bent toward the inside at the lower edge of the tip of the supporting part 4b, and the upward projected part (e) for detaching the lamp is formed to be projected at the upper edge in the center of the supporting part 4b. Therefore, the lamp 3 is detached with good workability by pressing and extending the upward projected part (e) of the lamp terminal 4 to the outside with the thumb.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holding device for detachably supporting an illumination lamp for exposure in an image forming apparatus.

[0002]

2. Description of the Related Art Below a contact glass of an image forming apparatus, an illumination lamp for moving and irradiating a document placed on the contact glass is provided.

The illumination lamp is removed at the time of cleaning or replacement. In the removal work, for example,
Remove the document retainer and contact glass, move the moving frame to which the illumination lamp is attached to the notch in the rear upper plate, and if the side reflector is provided on the front side of the machine, remove it, and then The illumination lamp can be removed by pushing the lamp terminal on the rear side of the machine backward.

[0004]

However, since the lamp terminal is made of a small plate member that elastically supports both ends of the illumination lamp and the work space is narrow, it is easy to push the lamp terminal backward. Was not.

The present invention has been made in view of such circumstances.
It is an object of the present invention to provide an illumination lamp holding device that enables easy removal of the illumination lamp.

[0006]

The present invention comprises means for solving the above-mentioned problems as follows. That is, the bases of a pair of lamp terminals that elastically sandwich both ends of the illumination lamp are fixed to a frame that moves below the contact glass in the image forming apparatus, and at least one of the bases of the lamp terminals is more than the base. It is characterized in that an upper convex portion is formed so as to project on the upper edge of the tip side.

[0007]

When the illumination lamp is removed, it is possible to easily push the upward convex portion formed on the upper edge of the lamp terminal with the thumb and spread it outward, so that the illumination lamp can be removed with good workability.

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a perspective view of a first moving frame (frame body) 2 provided with an illumination lamp holding device 1, and reference numeral 3 is an illumination lamp composed of a halogen lamp which constitutes an exposure scanning system,
Numerals 4 and 5 are lamp terminals made of elastic plate material for sandwiching both ends of the illumination lamp 3, and one of the lamp terminals 4 is a base portion 4a fixed to one end portion of the first moving frame 2 with a screw and a base portion thereof. 4a and a supporting portion 4b bent at a right angle, and a screw hole c is formed in the base portion 4a of the supporting portion 4b. A projection d for fitting in and out of the lamp is bent inwardly, and an upper convex portion e for removing the lamp is formed at a substantially central upper edge of the supporting portion 4b.

The other lamp terminal 5 is composed of a base portion 5a fixed to the other end of the first moving frame 2 with a screw and a support portion 5b bent at a right angle from the base portion 5a. While a screw hole c is opened, a projection f is formed at the tip of the support portion 5b so as to be fitted in the concave connection portion 3b on the other end side of the illumination lamp 3 so that the projection f is inwardly bent. ing.

In the illumination lamp holding device 1 including the lamp terminals 4 and 5 as described above, the upwardly convex portion e of one of the lamp terminals 4 is pushed outward by, for example, the thumb or the like to expand the illumination lamp 3 with excellent workability. Can be removed.
Further, even when it is mounted, the workability becomes extremely good by pushing and expanding the upper convex portion e.

The illumination lamp 3 sandwiched between the above-mentioned lamp terminals 4 and 5 is arranged in a reflection plate 6 (see FIG. 2) formed in a concave groove, and the original placed on the contact glass 7 is placed. 8 and the reflected light passes through an opening 9 formed in the side edge of the reflection plate 6 and is projected on the first mirror 10. Then, as will be described later, through another optical system 12. An image is formed by being focused on the photosensitive drum 11.

Explaining other parts (see FIG. 1), 15 is a rear upper plate, 16 is a front upper plate, 17 and 18 are notches for removing the illumination lamp, and 19 is a guide for the first moving frame 2. The other guide rail is provided inside the front upper plate 16. Reference numeral 20 is an exposure adjusting plate attached above the illumination lamp 3 by means of screws.

Although not shown in the drawings, driving optical wires horizontally wound inside the rear upper plate 15 and the front upper plate 16 are fixed to both ends of the above-mentioned first moving frame 2, 1 The illumination lamp 3 attached to the moving frame 2 is in the X direction (see FIG. 3)
The original placed on the contact glass 7 can be exposed and scanned by moving to.

Next, the main structure of the image forming apparatus 21 will be described. In FIG. 3, the optical system 12 is attached to the first mirror 10 mounted on the first moving frame 2 and the second moving frame 13. The second mirror 22, the third mirror 23, the fourth mirror 24, the fifth mirror 25, the sixth mirror 26, and the lens 27, which move the illumination lamp 3 and the first mirror 10 in the X direction at a predetermined speed. Then, the second and third mirrors 22 and 23 move in the same direction at a speed of 1/2 of that speed to irradiate the document on the contact glass 7 with irradiation, and the reflected light is reflected by the lens 27 and the fourth mirror.
24, the fifth mirror 25 and the sixth mirror 26 can be guided to the photosensitive drum 11.

A charging device is provided around the photosensitive drum 11.
31, developing device 32, transfer device 33, peeling device 34, cleaner 35
A static elimination image is formed by irradiating the surface of the photoconductor drum 11 that is uniformly charged by the charging device 31 with the reflected light from the document, and the electrostatic latent image is formed after that.
The toner image is visualized by 32, the above-mentioned toner image is transferred onto the paper fed from the registration roller by the transfer device 33 at a predetermined timing, and then the peeling device 34 peels the paper from the photosensitive drum 11, The cleaner 35 collects the residual toner, and the charge eliminating lamp 36 eliminates the residual charge.

In the image forming apparatus 21 configured as described above, when the illumination lamp 3 is removed, the document holder 14 and the contact glass 7 are removed, and then the first moving frame 2 is attached to the rear upper plate. Move to the notch 17 of 15. Then, the illumination lamp 3 can be easily removed by pressing the upward convex portion e of the lamp terminal 4 on the rear side of the machine backward with the thumb. When the illumination lamp 3 is a halogen lamp, it has a ceramic part and does not touch the lamp part. If a side reflector is provided on the machine front side of the first moving frame 2, the side reflector may be removed before the illumination lamp 3 is removed.

FIG. 4 shows a different embodiment, in which a lamp terminal 5 on the front side of the machine is formed with an upwardly convex portion e. In addition,
It goes without saying that the upward convex portion e may be formed on both the lamp terminals 4 and 5.

[0018]

As described above, according to the lighting lamp holding device of the present invention, since the upper convex portion is formed on the upper edge of the tip end side of the base portion of at least one lamp terminal, the upper convex portion is formed. By pushing, the lighting lamp can be removed outward with extremely good workability.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an illumination lamp holding device of the present invention.

FIG. 2 is a side view of the first moving frame.

FIG. 3 is a cross-sectional view showing the main configuration of the image forming apparatus.

FIG. 4 is a perspective view of an illumination lamp holding device showing another embodiment.

[Explanation of symbols]

2 ... Frame body, 3 ... Lighting lamp, 4, 5 ... Lamp terminal, 4a,
5a ... base, e ... upper convex portion.

Claims (1)

[Claims] 1. A base of a pair of lamp terminals that elastically clamps both ends of an illumination lamp is fixed to a frame that moves below a contact glass in an image forming apparatus, and at least one of the lamp terminals has the above-mentioned structure. An illumination lamp holding device characterized in that an upper convex portion is formed so as to project from an upper edge on the front end side with respect to the base portion.