KR19990041085A - Toner Supply Control Device of Developer - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic processor, and more particularly, to a toner supply control apparatus in a developing device using a two-component developing method.

I. The technical problem that the invention is trying to solve.

SUMMARY OF THE INVENTION An object of the present invention is to provide a toner supply control device for adjusting a toner supply timing so that toner can be supplied to a developing roller after a developer is applied to a developing roller surface in a two-component developing system.

All. Summary of the Solution of the Invention.

The present invention is formed by extending the gear projection on the outer surface of the feed roller gear, the hole formed in the center of the feed roller gear is formed with a half-moon-shaped groove in the inner side and the collar formed by projecting the protrusion on the outer peripheral surface is inserted, the caller The groove is characterized in that the end of the feed roller gear shaft is inserted and coupled.

la. Important use of the invention.

The present invention is used in an electrophotographic processor.

Description

Toner Supply Control Device of Developer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic processor, and more particularly, to a toner supply control apparatus in a developing device using a two-component developing method.

1 is a schematic diagram showing an internal structure of a developing device according to a two-component developing method.

The developing device according to the two-component developing method, as shown in FIG. 1, has a toner 65 loaded with a toner supply port on one side thereof, and a film is attached to both ends inside the toner loading part. A hopper 50, a toner film 18 attached to block the toner supply port of the toner loading portion, a supply roller 40 provided outside the toner supply port, and a developing chamber formed on the other side of the supply roller ( 35), a developing roller 30 provided inside the developing chamber, a developer loading part 20 formed on the other side of the developing roller, having a developer 60 loaded therein, and having a developer supply port; It consists of a developer film 28 installed to block the supply port.

Referring to the operation of the developing device configured as described above are as follows.

The developer 100 is mounted on the main body of the electrophotographic processor, and the developer film 28 and the toner film 18 are removed. Then, the developer 60 is applied to the surface of the developing roller 30 by the rotation of the developing roller 30, and the toner 65 is applied to the surface of the feed roller 40 by the rotation of the hopper 50. Then, the toner on the surface of the feed roller is supplied to the developing chamber 35 in which the developing roller is located by the rotation of the feed roller. Then, the toner supplied to the developing chamber is mixed with the developer applied to the surface of the developing roller 30 and coated on the surface of the developing roller.

On the other hand, the driving of the roller and the hopper as described above is possible by the drive gear installed on the outside of the developer, as shown in FIG. 2 is a side view showing a developer driving gear part according to a conventional embodiment.

The driving gear of the developing machine is a developing roller gear 71 coupled with a developing roller shaft, a connecting gear 72 meshed with the developing roller gear, and an outer gear having a small diameter on the outside thereof in engagement with a large inner diameter of the connecting gear. Is provided with a first reduction gear 73, a feed roller gear 74 engaged with an outer gear of the first reduction gear, the center of which is combined with a feed roller shaft 81, and the inside of the feed roller gear having a large diameter. And a second reduction gear 75 having an outer gear having a small diameter on the outside thereof, and a hopper gear 76 engaged with the outer gear of the second reduction gear and having a center thereof coupled with the hopper shaft 82. .

3 is a cross-sectional view showing a state in which a feed roller gear is mounted on a feed roller gear shaft according to a conventional embodiment. As shown in FIG. 3, the feed roller gear 74 is engaged with the feed roller gear shaft 81 by inserting the end of the feed roller gear shaft into a half-moon-shaped hole formed in the center of the feed roller gear. Like the feed roller gear, the hopper gear 76 also engages with the hopper gear shaft 82 by inserting the end of the hopper gear shaft into a half-moon-shaped hole formed in the center of the hopper gear.

However, when the developing roller gear rotates when the above method is used, the feed roller gear and the hopper gear rotate continuously. That is, since there is no interruption in the driving gear part of the developing machine, the toner in the toner loading part is introduced into the developing chamber and is buried in the developing roller before the developer is completely applied on the surface of the developing roller. There was a problem that the image quality is reduced.

In order to solve the above problems, an object of the present invention is a toner supply control device for adjusting a toner supply time so that toner can be supplied to a developing roller after a developer is coated on a developing roller surface in a two-component developing method. To provide.

In order to achieve the above object, the present invention provides a developing device using a two-component developing method, wherein a developing roller gear coupled to a developing roller shaft, a connecting gear engaged with the developing roller gear, and the connection are formed on an outer surface of the developing device. A first reduction gear having an inner gear having a larger diameter and having an outer gear having a smaller outer diameter thereof, a feed roller gear having an outer gear of the first reduction gear and having a center thereof coupled with a supply roller shaft; The feed roller gear is composed of a second reduction gear having an inner gear having a large diameter and an outer gear having a small diameter at the outside thereof, and a hopper gear having a center coupled with a hopper shaft with an outer gear of the second reduction gear. , The feed roller gear is formed to extend the gear projection on the outer surface, the hole formed in the center of the feed roller gear to form a half-moon-shaped groove on the inside and the outer circumference To be inserted into the projecting projection forming a caller caller, the caller of the groove characterized in that the coupling insert feed roller gear shaft end.

1 is a schematic diagram showing an internal structure of a developing device according to a two-component developing method;

2 is a side view showing a developer driving gear part according to a conventional embodiment;

3 is a cross-sectional view showing a state in which a feed roller gear is mounted on a feed roller gear shaft according to a conventional embodiment;

Figure 4 is a side view showing the drive gear of the developing device according to a preferred embodiment of the present invention,

Figure 5 is a cross-sectional view showing a state in which the supply roller gear having a feed roller mounted on the supply roller gear shaft according to a preferred embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

30: developing roller 40: feeding roller

60: developer 65: toner

71: developing roller gear 74: feeding roller gear

76: hopper gear 90: caller

92: curler projection 94: gear projection

100: developer

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that detailed descriptions of related known functions or configurations may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic processor, and more particularly, to a toner supply control apparatus in a developing device using a two-component developing method.

Figure 4 is a side view showing the drive gear of the developing device according to a preferred embodiment of the present invention, Figure 5 is a feed roller gear and a hopper gear having a feeder according to a preferred embodiment of the present invention respectively feed roller gear shaft and hopper gear This is a cross-sectional view showing the mounting on the shaft.

4 and 5, the toner supply control apparatus of the present invention includes a developing roller gear 71 coupled with a developing roller shaft at a developing side, a connecting gear 72 engaged with the developing roller gear, The first gear reduction gear 73 is formed in the coupling gear and meshes with the inner gear having a large diameter, and the outer gear having a small diameter is formed outside.

In addition, a feed roller gear 74 meshed with the outer gear of the first reduction gear and the center thereof is combined with the feed roller shaft, and the feed roller gear meshes with the inner gear having a large diameter and the outer gear with a small diameter outside. The second reduction gear 75 is formed, and a hopper gear 76 engaged with an outer gear of the second reduction gear and having a center thereof coupled with a hopper shaft.

In particular, the feed roller gear 74 extends to form a gear projection 94 on the outer surface as shown in Figs. In addition, the hole formed in the center of the feed roller gear is formed with a half-column-shaped groove on the inner side and a collar 90 which protrudes the collar protrusion 92 on the outer circumferential surface thereof, and the feed roller gear shaft ( The end of 81 is inserted and engaged.

Like the feed roller gear, the hopper gear 76 also has a hole 90 formed in the center of the hopper gear in which a half moon-shaped groove is formed on the inside and a protrusion 90 is formed on the outer circumferential surface thereof. The end of the hopper gear shaft 82 is inserted into the groove.

When the developing roller gear 71 rotates in the direction of the arrow, the feed roller gear 74 rotates via the connecting gear 72 and the first reduction gear 73. At this time, the gear protrusion 94 formed on the surface of the feed roller gear is in contact with the roller protrusion 92 after the feed roller gear rotates once, and then the feed roller shaft 81 coupled with the caller while the roller 90 rotates. ) Rotates.

On the other hand, the second reduction gear 75 engaged with the feed roller gear 74 rotates, and the hopper gear 76 engaged with the outer gear of the second reduction gear rotates. At this time, the gear protrusion 94 formed on the surface of the hopper gear is in contact with the colloid projection 92 after the hopper gear rotates once, and then the hopper shaft 82 coupled with the collimator rotates while the collar 90 is rotated. do.

That is, even if the developing roller gear rotates, the feed roller gear does not rotate immediately but rotates after a certain time has passed after the development roller gear rotates. Due to such drive interruption or drive delay between the gears, the toner is supplied to the developing chamber only after a certain time after the developer is applied to the developing roller.

As described above, the toner supply control apparatus of the developer according to the embodiment of the present invention delays the toner supply time until the developer is applied to the developing roller so that the concentration of the developer and toner on the surface of the developing roller is suitable for image formation. It is effective to maintain.

Claims (2)

In the developing device using the two-component developing method, A first roller having a developing roller gear coupled to a developing roller shaft, a connecting gear meshed with the developing roller gear, and a connecting gear meshed with the developing roller gear, and an outer gear having a small diameter on the outer side of the developing machine; A reduction gear, a supply roller gear meshed with an outer gear of the first reduction gear, and a center thereof combined with a supply roller shaft, and the supply roller gear meshes with a large inner gear and an outer gear with a small diameter A second reduction gear and a hopper gear meshed with an outer gear of the second reduction gear and coupled to a hopper shaft at the center thereof; The feed roller gear extends a gear protrusion on the outer surface, and a hole formed in the center of the feed roller gear is formed with a half-moon-shaped groove on the inside and a caller formed with a protrusion on the outer circumferential surface of the feed roller. And a feed roller gear shaft end portion is inserted into and coupled to the groove. The method of claim 1, The hopper gear is formed to extend the gear protrusion on the outer surface, the hole formed in the center of the hopper gear is formed with a half-moon-shaped groove on the inside and the collar is formed to protrude the collar protrusion on the outer peripheral surface, the groove of the collar A toner supply control device for a developing device, characterized in that the end of the hopper gear shaft is inserted and coupled.