JPS58176886A - Current collector structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a current collector structure used, for example, in an electrophotographic copying machine.

Conventionally, for example, in a movable stand of an electrophotographic copying machine, a current collector is used which supplies power to an illumination lamp or the like and which is slidably connected to an electrode plate of a fixed part of the device. In conventional current collectors, the electrical connection between the power supply sheet metal and the current collection brush is achieved through a coil spring interposed between the power supply sheet metal and the current collection brush.
The coil spring generates heat, causing problems such as premature fatigue, noise, and poor continuity.

In view of the above-mentioned conventional problems, the present invention has been developed by forming a keyhole-shaped groove in one of the power supply plates to which one end of the lead wire is connected, and in which a coil spring is fitted to the lead wire. A current collector structure is proposed, characterized in that a current collector brush is fixed to the other end, the coil spring is compressed, the 11#IK lead wire is passed through the key hole, and a power supply sheet metal is housed in an insulating block. It is.

The present invention will be explained in detail below with reference to an embodiment shown in one drawing.

1 and 2 show the overall structure of an electrophotographic copying machine incorporating a current collector II according to the present invention.

The body frame of an electrophotographic copying machine consists of a pair of opposing m [IA, IB, and their end plate IA.

It is constructed into a box shape with an open upper part from a pair of side plates 2A and 2B assembled to IB.

As shown in FIG. 2, in the center of the machine frame, a photosensitive drum 3 is installed, which is driven nine rotations in the direction of the arrow. a plurality of process devices, namely charging electrodes 4;
A magnetic brush display device 5, a transfer paper guide plate 6, a transfer/separation electrode 7, a static elimination electrode 8, and a cleaning device 9 are arranged and positioned, and these process devices can be pulled out from the machine frame as shown in the first figure. It is assembled to the frame 10. In FIG. 2, reference numerals 11, 12°13, 14, and 13 indicate a paper feed cassette, a paper feed roller, a conveyance roller, a fixing device, and a paper discharge roller device.

The side plates 2A and 2B have an upper flange 2m bent at right angles inward of the fuselage frame. These upper 7 lunges each have a b! Easy.

An exposure optical system housing B integrally molded into a deep dish shape from a resin having heat insulating properties is mounted on 2b.

Although not limited, 4. This exposure optical system housing B
The method involves first injecting a small amount of foamed resin into the mold cavity, then blowing high-pressure gas into the cavity to harden the surface resin of the mold cavity, and removing the high-pressure gas to harden the internal resin. By employing a foaming molding method, it is possible to obtain a housing with precise dimensions that is lightweight, highly insulating, and free from hot water sinks.

The exposure optical system housing B includes a substantially rectangular bottom wall l, and a pair of end walls 17A, 17 surrounding the bottom l1l16 on all sides.
B and @1118A, 18B, and these end walls 1
7 people, 17B and @918A, 18B have many ventilation holes 19, and the bottom! The normal phase screws 21 inserted into the mounting holes 20 formed at the four corners of the upper part 7
By screwing into the screw holes 22 of the lunges 2a and 2b,
Can the exposure optical system housing B be fixed to the aircraft frame AK? Therefore, when the exposure optical system housing B is assembled to the aircraft frame AK, the space OK ventilation hole 19 between the aircraft housing Y and the aircraft frame person is connected as shown in the second diagram. Convection or blow-by of the cabin air occurs inside B, and overheating of the fog light optical system is prevented.

A projection lens mounting seat 23 is integrally molded in the center of the bottom wall 16 of the exposure optical system housing B, and a projection lens 24 is attached to the projection lens mounting seat 23 with a U''-shaped band 5. In addition, a light-shielding box 26 rising upward is integrally molded in a portion near one end of the bottom wall 16, and a layer surface of this light-shielding box 26 on the side opposite to the projection lens 24 has a photosensitive layer. body drum 30 circumferential surface nine oriented mirror 2
7 is fixed. Further, the lower surface of the nine-ton light box 26, which is open at the bottom, is covered with a small light-shielding plate 28 having a length of 28 m and which can be freely removed and removed.

18 people on both side walls of the exposure optical system housing B.

The upper surface of 111B serves as guide rail surfaces 33A and 33B on which the illumination lamp 29, mirror 3o, and both ends of the first movable base 320 attached to the slit plate 31'ft:9 are placed.
On the guide rail surfaces 34 of the side walls tsA, uB located internally lower than these guide rail surfaces 33A, 33B, both ends of the second movable base 37 have two mirrors 35, 36 at right angles. part is guided and supported.

Of course, the floating pulley 38 at the end of the first movable base 32 and the end of the 1s2 movable base 37. A wire (not shown) is stretched between fixed pulleys 39' and 40 at both ends of the side walls 18A and 111B, and a relay pulley 41 in the middle of the 18 side walls, and this wire moves the first movable base 32 at a constant speed. in,
9, the second movable base 37 is 1/! of the first movable base 32! It will be moved at a speed of K.

The elucidation lamp 29 is provided at both ends of the first movable table SZ.
A pair of current collectors 4x as shown in the third figure are fixed in order to supply current to. That is, the current collector a42 has an insulating block 4B made of resin and has a housing hole 44 into which the bottom plate 43m of the power feeding sheet metal 43 bent into an L-shape is inserted, and this insulating block 41 has a bottom plate. Square hole 4 of part 431
A fixing screw 49 is screwed into the four screw holes on the side surface of the vertical block 45m through the circular hole 4s of the side plate portion 43b of the power supply sheet metal 43. This fixing screw 49 fixes the power supply plate 43 to the insulating block 46Kliil. Further, the illumination lamp 29 is provided on the side plate portion 41b of the power supply sheet metal 43.
A nine power cord 50 is led from and connected, and this power cord sO is collinear with the power supply plate 43 by a fixing screw 49.

A collector brush 51 is fixed to the head of the power feeding sheet metal 43, and the base of 92 lead wires 51 and 51BO are soldered. That is, these lead wires 11A and 51B are
As shown in the figure, with the FC coil spring 52 installed, the side plate 4
3bK, the base is soldered to both sides of the bottom plate 43m, and while compressing the coil spring 52, connect the lead wires slA and stB to the keyhole-shaped groove 53 on the opposite side of the bottom plate 43m.
It is assembled by inserting the middle part of the

Of course, in this assembled state, the current collecting brush 51 has a tendency to move upward due to the pressing force of the coil spring 52.

As shown in FIGS. 1 and 2, two sets of three bosses are provided at both ends and in the middle of both side walls 18A and 18B of the exposure optical system housing B, rising above both side walls 111A and 18B. 54A, 54B! ! 40 and 55A, 55B,
The sso is integrally molded. Bost +5 for each of these sets
4A, 58B, 880 and 55 people.

55B and 150 are provided at positions offset from each other in the width direction of the exposure optical system housing BC1 so as not to be lined up in a horizontal plane and aligned in a straight line, as shown in FIG. located on the same horizontal plane. And the boss l54A of each of these sets.

14B! 540 and 51A, 5! On IB, 350, there is a glass mounting plate s located above the current collector @42 mentioned above.
Seven people, 57B, are each fixed with Samurai screws 58.

These glass mounting plates 157A and 57B are made of electrically insulating resin in the shape of an elongated flat plate, and as shown in the broken view in FIG. Electrode plates 59 are dug, and these electrode plates 59
The lighting rung HIK power is supplied from the lighting rung. In addition, regarding the glass nitrogen attached plates 57A and 1S7B,
A document platen glass D is hung and fixed so as to cover the upper part of the exposure optical system housing B.

As is clear from the above description, in the current collector structure of the present invention, since the current collecting brush 51 and the power feeding sheet metal 43 are connected through the lead wires 51A and 518K, the coil spring 52 does not get fatigued due to heat generation. is dangerous, and the electrical connection is stable, so there is a lot of noise. Therefore, no discharge occurs between the coil spring st and the current collecting brush 51, and generation of an erroneous signal to the control device can be prevented. Further, in the current collector structure of the present invention, the current collecting brush 51 is connected to the power feeding sheet metal 43.
Another advantage is that it can be easily assembled by simply assembling #c and assembling it on the insulating block 45.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the body of an electrophotographic copying machine according to the present invention, Fig. 2 is a cross-sectional view of the copying machine, Fig. 3 is an exploded view of a current collector, and Fig. 4 is a current collector brush. Explanatory diagram of how to assemble the 5th
The figure is a nine exploded perspective view showing the relationship between the exposure optical system housing and the glass support plate. B...Exposure optical system housing. D...Original table glass, 29...Illumination lamp,
42... Current collector, 43... Power supply sheet metal, 4
m... Insulation block, 81... Current collector brush, 1
1A, 51B...Lead wire, 52...Coil spring. Patent applicant: Konishiroku Photo Industry Co., Ltd. 45a

Claims (1)

[Claims] 1) Form a keyhole-shaped groove in one of the power supply plates to which one end of the lead wire is connected, and with a coil spring fitted to the lead wire, fix a current collector brush to the other end, and press the coil spring. A current collector structure characterized in that the keyhole type #llK lead wire is passed through in a contracted state and a power supply plate is housed in an insulating block.