JPH07306587A - Developing device - Google Patents

Abstract

PURPOSE:To provide a developing device capable of preventing a deterioration in copied image quality. CONSTITUTION:The developing device is provided with a developing sleeve 205 supplying toner onto the surface of a photoreceptor drum 8, a bristle cutting member 206 provided 111 proximity to the surface of the developing sleeve 205, a regulating means 9 provided in a position nearer to the upstream side than the position of the bristle cutting member 206, based on the rotational direction of the developing sleeve 205 as a reference and adjacent to the bristle cutting member 206 and regulating the top end of the bristle of A developer so as to incline it to ward the upstream side and a guiding edge part 10c, etc., receiving all or a part, of the developer regulated by the regulating means 9 and separated from the bristle of the developer, to lead the received separated developer in a direction away from the developing sleeve 205, on almost the lower side of the regulating member 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device usable in an image forming apparatus.

[0002]

2. Description of the Related Art Conventionally, as an image forming apparatus, for example, a circulation type developing apparatus 200 by a two-component developing method such as a copying machine.
Then, as shown in FIG. 8, a conveying screw 201 for stirring and conveying the developer is provided so as to be rotatable two by sandwiching the partition wall 202.
No. 4 is disposed on the side wall portion 203 of the developing device 200 at a position close to the conveying screw 201. The toner concentration detection sensor 204 is configured to be able to detect the toner concentration of the developer carried by the carrying screw 201. Here, FIG. 8 is a partial schematic configuration diagram of the circulation type developing device 200 when viewed from the side.

In such a developing device 200, the developer carried by the carrying screw 201 or the like is successively supplied to the surface of the developing sleeve 205, and the developing sleeve 20.
By rotating 5 (rotating in the direction of the arrow shown in the figure),
The thickness and the like are adjusted through the bristle cutting plate 206 and come into contact with the surface of the photosensitive drum 207. Then, the photosensitive drum 207
A toner image is formed on the surface of the.

[0004]

However, in the above-described structure, when the developing device 200 is used for a long period of time, the same toner adheres to the surface of the developing sleeve 205 and is hard to separate, and the surface of the photosensitive drum 207 is difficult to separate. There is a problem in that the original function of the developing sleeve 205 of supplying toner to the toner deteriorates, and as a result, the image quality of the copying machine deteriorates.

An object of the present invention is to provide a developing device capable of preventing deterioration of image quality in consideration of the above problems of the conventional developing device.

[0006]

According to a first aspect of the present invention, there is provided a developing sleeve for supplying toner to the surface of a photosensitive member, a spike cutting member provided in the vicinity of the surface of the developing sleeve, and rotation of the developing sleeve. Development based on the direction, provided with an upstream side of the position of the ear cutting member and at a position adjacent to the ear cutting member, and regulating means for regulating the tip of the developer so as to incline to the upstream side. It is a device.

According to the second aspect of the present invention, a magnet roller is fixedly provided inside the developing sleeve, and the magnet roller is located upstream of the regulating means when the developing sleeve is in a stopped state. In the developing device, the magnetic poles are set so that the developer spikes are formed on the developing sleeve in the vicinity.

According to a third aspect of the present invention, there is provided a developing device in which the magnetic roller has a magnetic pole arranged at a position substantially facing the upstream side.

According to a fourth aspect of the present invention, all or a part of the separated developer separated from the spikes of the developer, which is regulated by the regulating means as the developing sleeve rotates, is received. In the developing device, a guide member for guiding the separated developer in a direction away from the developing sleeve is provided on the upstream side of the magnetic pole with the rotation direction as a reference and substantially below the regulating means.

According to a fifth aspect of the present invention, all or a part of the separated developer separated from the spikes of the developer, which is regulated by the regulating means as the developing sleeve rotates, is received. In the developing device, a guide member for guiding the separated developer in a direction away from the developing sleeve is provided substantially below the regulating means.

According to a sixth aspect of the present invention, the guide member is
One end of the guide member is located on the side where the developing sleeve exists, with reference to the position of a conveying screw that is arranged adjacent to the developing sleeve and that conveys the developer while stirring the developer in the axial direction of the developing sleeve. The developing device is formed so as to extend to the upper side on a side different from.

In the present invention of claim 7, the regulating means is AB.
The developing device is made of an S resin material, and the guide member is made of a stainless material.

According to the present invention of claim 8, the regulating means has a step formed on the side facing the developing sleeve, or an inclined surface inclined upward toward the upstream side with reference to a horizontal plane. In the developing device, the amount of the separated developer is larger than that in the case where the step or the inclined surface is not formed.

According to a ninth aspect of the present invention, the guide member comprises:
An upstream side of the regulating means has an attaching portion to which the regulating means is attached and a guide portion for guiding the separated developer in a direction away from the developing sleeve, and between the attaching portion and the guide portion. In the developing device, an opening is formed to allow formation of a spike of the developer.

The present invention of claim 10 is a phenomenon device in which the opening of the guide member is formed in a region substantially facing the magnetic pole of the magnet roller.

According to the present invention of claim 11, the guide member has an attaching portion to which the regulating means is attached, and a guide portion for guiding the separated developer in a direction away from the developing sleeve. In the developing device, an opening for allowing the formation of the spikes of the developer is formed between the portion and the guide portion on the upstream side of the regulation unit.

According to the twelfth aspect of the present invention, the major axis direction of the opening is substantially parallel to the rotation axis direction of the developing sleeve, and the length of the opening with respect to the major axis direction is a reference. The developing device is formed so as to have substantially the same length as the developing sleeve with respect to the rotation axis direction.

According to a thirteenth aspect of the present invention, the developing sleeve for supplying the toner to the surface of the photosensitive member, the spike cutting member provided in the vicinity of the surface of the developing sleeve, and the rotating direction of the developing sleeve are used as a reference. Upstream of the position of the ear cutting member, and at a position adjacent to the ear cutting member, and a regulating means for regulating the tip of the developer so as to incline to the upstream side, the magnetic force of the developing sleeve and the In the developing device, the regulating portion of the regulating means is arranged inside the area of the spike of the developer formed based on the rotation of the developing sleeve.

[0019]

According to the present invention of claim 1, the developing sleeve supplies toner to the surface of the photosensitive member, the spike cutting member is provided close to the surface of the developing sleeve, and the regulating means is based on the rotating direction of the developing sleeve. Provided upstream from the position of the ear cutting member and adjacent to the ear cutting member,
As a result of controlling the tip of the developer to fall to the upstream side, the tip of the developer fell to the upstream side is separated from the ear of the developer.

According to the thirteenth aspect of the present invention, the developing sleeve supplies toner to the surface of the photosensitive member, the spike-cutting member is provided in the vicinity of the surface of the developing sleeve, and the regulating means uses the rotational direction of the developing sleeve as a reference. And is provided upstream of the position of the ear cutting member and at a position adjacent to the ear cutting member, and regulates the tip of the developer so as to incline to the upstream side. Here, the regulating portion of the regulating means is arranged inside the area of the spike of the developer formed based on the magnetic force of the developing sleeve and the rotation of the developing sleeve.

[0021] As a result, the tip that has fallen to the upstream side is
Separated from the developer spikes.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an external perspective view of a copying machine body having a developing device according to an embodiment of the present invention. FIG. 2 is a partial schematic cross-sectional view of the copying machine main body centering on the developing device for explaining the configuration of the present embodiment. The configuration of the present embodiment will be described with reference to FIG. The same components as those in FIG. 8 are designated by the same reference numerals.

As shown in FIG. 1, the copying machine main body 1 has an operating section 2 and a display section 2a on the front side, the original placing table 3 on the upper side, and copying on the left side. Ejecting units 4 for ejecting sheets are provided respectively, and a toner hopper 5 and a developing device 6 described later and a toner cartridge 7 and the like of one embodiment according to the present invention are structurally substantially integrated (see FIG. In the figure, the portion A indicated by the dotted line) is provided in the central portion on the right side of the copying machine main body 1. Further, the front panel 15 is attached so that it can be opened and closed by an operator for replacement and maintenance of the toner cartridge 7 and the like.

In FIG. 2, a toner hopper 5 is provided adjacently above the developing device 6, and a toner cartridge 7 is slidably movable above the developing device 6 from the front side of the copying machine main body 1. It is installed in.

Toner storage chamber 1 inside the toner hopper 5.
A supply port 105 for supplying the toner 104 to the developing device 6 is provided on the bottom surface of 02a. This supply port 1
The place where 05 is provided is above a first conveying screw 41, which will be described later, provided in the developing device 6, and at a place corresponding to the front side of the copying machine body 1 (front side in FIG. 1). is there. A screw conveyor 106 is rotatably provided inside the toner storage chamber 102a above the supply port 105, and further, two elongated plate-shaped blades 10 are provided.
Two plate-shaped toner conveying members 107 having 7a are rotatably arranged in parallel with the screw conveyor 106 (see FIG. 2).

On the other hand, in the developing device 6, a new toner 104, which is supplied from the upper supply port 105, is carried with the developer circulating in the developing device 6 while being conveyed. Conveying screw 41, second conveying screw 42
Are provided so as to be rotatable in order from the right side in the drawing across the partition wall 202 (the rotation directions are respectively indicated by arrows D and E in FIG. 2), and the toner concentration detection sensor 204 is provided in the developing device 6. It is arranged on the side wall portion 203.

A developing sleeve 205 is rotatably provided (rotating in the direction of arrow F shown in FIG. 2) next to the second conveying screw 42, and the photosensitive drum 8 is further adjacent to the developing sleeve 205. It is arranged so that it can rotate (rotate in the direction of arrow G shown in the figure).

A spike-cutting plate 206 serving as a spike-cutting member of the present invention is provided above the developing sleeve 205, and a stepped portion 9a is provided adjacent to the spike-cutting plate 206 on the side facing the developing sleeve 205. The restricting means 9 is slightly longer than the developing sleeve 205 and is provided in parallel with the rotation axis of the developing sleeve 205. Further, the guide member 10 having a predetermined elongated hole 10a is shaped so as to surround the restricting means 9. It is molded and arranged. The guide member 10 is
It is attached to the developing device with the regulating means 9 attached. Here, the length of the developing sleeve 205 is a length based on the rotation axis direction.

Next, the restricting means 9 and the guide member 10 will be further described with reference to FIG. Here, FIG.
[FIG. 3] is a cross-sectional perspective view centered on the guide member 10.

As shown in the figure, the stepped portion 9 of the regulating means 9
“A” is provided for the purpose of effectively tipping the developer ears formed on the surface of the developing sleeve 205.

The guide member 10 includes a developing sleeve 20.
5, the length of the long hole 10a provided in the bent portion 10b is configured to be substantially the same as the length of the developing sleeve 205. A plurality of reinforcing plates 61 for preventing deformation
Are spot-welded so as to straddle the long hole 10a.

Here, the long axis direction of the long hole 10a coincides with the rotation axis direction of the developing sleeve 205. The length of the long hole 10a is a length based on the long axis direction.

The guide end 10c, which is a part of the guide member 10, has a slight downward slope from the bent portion 10b, extends in a direction away from the developing sleeve 205, and extends slightly above the second conveying screw 42 to form a partition wall. It has reached the position advanced to the 202 side (see FIG. 2). The guide portion of the present invention corresponds to the guide end portion 10c.

Both the regulating means 9 and the guide member 10 need to be made of materials that are not magnetized. An ABS resin material is used for the former and a stainless steel material is used for the latter.

The operation of the present embodiment having the above-mentioned structure will be described with reference to the drawings.

That is, as shown in FIG. 2, new toner 104 drops toward the toner storage chamber 102a from the opening of the toner cartridge 7 mounted adjacently above the toner hopper 5, and further, the screw conveyor. 106
And the like are supplied to the developing device 6 side through the supply port 105.

In this way, when the new toner 104 is supplied to the developing device 6, the first conveying screw 41 rotates in the direction of arrow D as shown in FIG. 3, and is replenished from the developer or the supply port 105. While stirring the new toner 104 and the developer that have been conveyed, the developer is conveyed in the direction of the thick arrow shown in FIG. Here, FIG. 3 shows the developing device 6 shown in FIG.
FIG. 7 is a lateral cross-sectional view taken along line Y ₁ -Y ₂ of FIG.

On the other hand, the second conveying screw 42 has an arrow E
, The developer conveyed from the first conveying screw 41 is further stirred, and a part of the new developer is supplied to the developing sleeve 205 rotating in the arrow F direction. The supplied new developer is subjected to predetermined adjustment by the regulating unit 9 and the ear cutting plate 206, which will be described later, and is rotatably conveyed to the photosensitive drum 8 (see FIG. 2) adjacent to the developing sleeve 205. The toner in the new developer conveyed to the photosensitive drum 8 develops the surface of the photosensitive drum 8. The developer after the development processing is further rotated and conveyed along with the developing sleeve 205 that rotates in the predetermined direction, and eventually leaves the developing sleeve 205 and is again conveyed by the second conveying screw 42.
And is returned to the first conveying screw 41 side.

By the way, as shown in FIG. 5A, the new developer supplied to the developing sleeve 205 is attracted by the magnetic force of a magnet roller (not shown) disposed inside the developing sleeve 205, and the developing sleeve is attracted. On the surface of 205, a magnetic brush 70 as a spike of the developer of the present invention
1 is formed.

However, the leading end portion 701a of the magnetic brush 701 conveyed along with the rotation of the developing sleeve 205 in the F direction is further blocked by the presence of the restricting means 9 (see FIG. 5A). ), Guide member 1
The tip portion 701a which is inclined to extend through the hole portion of the elongated hole 10a of 0 and is further pushed and extended to the point where the attraction force of the magnet roller is no longer exerted by further rotation of the developing sleeve 205 is shown in FIG. 5 (b)
As shown in FIG. 6, the magnetic brush 701 is separated from the main body portion and drops onto the guide end portion 10c extending downwardly toward the partition wall 202 side.

The dropped tip portion 701a of the spikes is returned to the side of the second conveying screw 42 and is agitated in the developer being conveyed. The step 9a formed on the regulating means 9 is for effectively pushing down the magnetic brush 701 so that a larger amount of the separable tip portion 701a can be captured. Here, FIG. 5A is an explanatory view showing a state in which the magnetic brush formed on the surface of the developing sleeve 205 is deformed by the presence of the regulating means 9, and FIG. 5B is a developing sleeve. FIG. 5 is an explanatory diagram showing a state where a part of the magnetic brush formed on the surface of 205 is separated and drops.

Next, the magnet roller arranged inside the developing sleeve 205 for forming the magnetic brush 701 will be described more specifically with reference to FIG.

FIG. 5A shows five magnets fixedly arranged inside the developing sleeve 205. The strength of the magnetic poles of these magnets is as shown below.

That is, N ₁ ; 850 ± 50 (Gauss),
N ₂ ; 500 ± 50 (Gauss), S ₁ ; 540 ± 50 (Gauss), S ₂ ; 530 ± 50 (Gauss), S ₃ ; 500 ±
It is 50 (Gauss). Here, N ₁ and N ₂ indicate north poles, and S _{1 to} S ₃ indicate south poles. On the other hand, if the regulating means 9 does not exist, the spikes of the developer are formed due to the rotation of the developing sleeve 205 and the magnetic force of the above-mentioned magnet. The fact that the regulation means 9 is provided is apparent from the above description.

For this reason, the spikes of the developer formed on the surface of the developing sleeve 205 having the magnet roller having the above-mentioned structure inside are restricted by a part of the original area for forming the spikes described above. As described above, due to the presence of No. 9, it is formed so as to be pushed down to the upstream side from the original spike-forming area (Fig. 5).
(See (a)).

In this case, when the developing sleeve 205 is formed so as to push down the spikes of the developer toward the upstream side at the position corresponding to the magnet N ₂ during the rotating operation, and when the developer is to be separated, The height of the spikes is determined as a result within the area on the outer peripheral surface of the developing sleeve 205 from the position where the magnet S ₃ is arranged as a position for scooping up the developer to the position of the spike cutting plate 206. The following are considered to be the highest.

That is, the magnetic force and the arrangement of the magnets as described above in the magnet roller, the shape and arrangement of the regulating means 9, and the shape and arrangement of the elongated hole 10a of the guide member 10 are comprehensively taken into consideration. The object mentioned above is achieved. Incidentally, since the developer layer formed on the surface of the developing sleeve 205 is generally affected by the magnetic lines of force by the magnetic poles inside the magnet roller, a bristle is formed at the position where the magnetic poles face each other on the surface of the developing sleeve 205. However, it is well known that the spikes are not formed at the position between the magnetic poles.

Here, the magnet N in the magnet roller
The arrangement of ₂ will be further described.

The relative arrangement position of the magnet N ₂ is shown in FIG.
As shown in (a), it is set so as to be slightly upstream of the restricting means 9 with respect to the rotation direction F and to face the position of the long hole 10a.

It has already been described that the area occupied by the spikes formed on the surface of the developing sleeve 205 normally exists at the position corresponding to the position of each magnetic pole.

Here, regarding the Elijah occupied by the spikes,
More specifically, there is a difference in the area depending on whether the developing sleeve 205 is rotating or not.

That is, as compared with the above-mentioned area when the rotation of the developing sleeve 205 is stopped, the developing sleeve 205 is
Area during rotation of the developing sleeve
5 is formed on the surface of the developing sleeve 205 along the rotation direction F of 5 at a position slightly deviated to the downstream side.

In the present embodiment, in consideration of this phenomenon, the developing sleeve 205 is configured to more effectively form the spikes of the developer while the developing sleeve 205 is rotating.

Therefore, as another embodiment, the spike of the developer formed while the rotation of the developing sleeve 205 is stopped is
Although not restricted by the restricting means 9, it is of course possible that the above-described effect is exerted by the restriction during rotation.

In this way, the tip of the developer formed to have the highest height during the rotation of the developing sleeve 205 has the elongated hole 10 provided on the upstream side of the regulating means 9.
It penetrates through a and its tip is separated.

Therefore, the amount of the developer at the tip portion is exerted so that a larger amount is forcibly separated.

In this way, the tip portion 701a having a relatively high mixing ratio is forcibly separated from the magnetic brush 701 containing old toner that tends to remain attached to the surface of the developing sleeve 205. By repeating the stirring with the other developer, the stirring of the developer is effectively performed, and it is possible to prevent the old toner from adhering to the surface of the developing sleeve 205 and becoming difficult to separate, and to reduce the copy image quality. It can be prevented.

In the above-described embodiment, the case where the developing device 6 is of the circulation type has been described, but any method may be used as the method of conveying the developer, and the content of the method is not limited.

Further, in the above embodiment, the step 9 is formed on the regulating means 9.
Although the case where a is formed has been described, the present invention is not limited to this, and of course, a predetermined inclined surface 9b may be formed instead of the step 9a. That is, FIG. 6 shows a configuration example in which the corner portion on the right side of the drawing in the lower surface of the regulating means 9 is chamfered to form an inclined surface 9b. The inclined surface 9b is inclined obliquely upward to the right in the figure with the horizontal portion, which is a part of the lower surface of the regulating means 9, as a reference surface.
Moreover, the inclined surface 9b is provided so as to obtain the same effect as that described in the case of the step 9a.

Further, in the above embodiment, the step 9 is formed on the regulating means 9.
Although the case where there is a and the guide end portion 10c exists has been described, the present invention is not limited to this, and the elongated hole 10a and the guide end portion 10c may be omitted as shown in FIG. 7A, for example.
Alternatively, as shown in FIG. 7B, it goes without saying that the step does not have to be formed on the developing sleeve side of the regulating means.
In any case, the tip portion 701a of the magnetic brush can be forcibly separated, so that it is stirred with other developer,
By repeating this, it is possible to prevent old toner from adhering to the surface of the developing sleeve 205 and becoming difficult to separate, and to prevent deterioration of copy image quality.
Here, FIG. 7A is a sectional view centering on the regulating means of the developing device when only the regulating means having no step is provided, and FIG. 7B is a regulating means and the guide member having no step. 1
FIG. 3 is a cross-sectional view centering on a restricting unit of the developing device in the case where 0 and 0 are provided.

In the above embodiment, the case where the guide end 10c is formed integrally with the guide member 10 has been described. However, the present invention is not limited to this, and the guide end 10c is separated to a predetermined location. May be fixed to the guide means, or only the guide end portion may be provided substantially below the regulating means.

The present invention is not limited to the copying machine, but can be applied to other image forming apparatuses having a developing device such as a printer and a facsimile.

[0064]

As is apparent from the above description, the present invention has an advantage that deterioration of image quality can be prevented more effectively than in the past.

[Brief description of drawings]

FIG. 1 is an external perspective view of a copying machine main body having a toner hopper and a developing device according to an embodiment of the present invention.

FIG. 2 is a partial schematic cross-sectional view of a copying machine main body centering on the developing device of the present embodiment.

FIG. 3A is a lateral cross-sectional view taken along the line Y ₁ -Y ₂ for showing the configuration of the developing device of the embodiment.

FIG. 4 is a sectional perspective view centered on a guide end portion of the embodiment.

5A is a cross-sectional view showing how the magnetic brush formed on the surface of the developing sleeve of the embodiment is deformed. FIG. 5B is formed on the surface of the developing sleeve of the embodiment. A cross-sectional view showing how a part of a magnetic brush separates and falls off

FIG. 6A is a cross-sectional view of a developing device in which a regulation unit having an inclined surface instead of a step is provided.

FIG. 7A is a cross-sectional view centering on the regulating means of the developing device in the case where only the regulating means having no step is provided. FIG. 7B is provided with the regulating means having no step and a guide member. Sectional view centering on the regulating means of the developing device in the case

FIG. 8 is a partially schematic configuration diagram of a conventional circulation type developing device when viewed from the side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Copier main body 5 Toner hopper 6 Developing device 7 Toner cartridge 9 Regulation means 9a Stepped portion 10 Guide member 10a Long hole 10c Guide end portion 41 First conveying screw 102a Toner storage chamber 104 Toner 105 Supply port 106 Screw conveyor 107 Plate-shaped toner Conveying member 206 Ear cutting plate 205 Developing sleeve

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[Procedure amendment]

[Submission date] May 19, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

FIG. 3 shows Y ₁ − for showing the configuration of the developing device of the embodiment.
Y ₂ arrow cross section

Claims (13)

[Claims] 1. A developing sleeve that supplies toner to the surface of the photosensitive member, a spike cutting member provided in the vicinity of the developing sleeve surface, and a position of the spike cutting member based on the rotation direction of the developing sleeve. A developing device, which is provided on an upstream side and adjacent to the bristle cutting member, and which regulates a tip of the developer so as to tilt it toward the upstream side. 2. A magnet roller is fixedly disposed inside the developing sleeve, and the magnet roller is provided on the developing sleeve in the vicinity of the upstream side of the regulating means when the rotation of the developing sleeve is stopped. 2. The developing device according to claim 1, wherein the magnetic pole is set so that the spikes of the developer are formed on the magnetic recording medium. 3. The developing device according to claim 2, wherein the magnet roller has a magnetic pole arranged at a position substantially facing the vicinity of the upstream side. 4. The separation developer, which is regulated by the regulation means in accordance with the rotation of the developing sleeve and is separated from the spikes of the developer, receives all or part of the separated developer, and receives the separated developer. 4. The developing device according to claim 2, wherein a guide member for guiding in a direction away from the developing sleeve is provided on the upstream side of the magnetic pole with respect to the rotation direction and substantially below the restricting means. apparatus. 5. Along with the rotation of the developing sleeve, the separating developer is regulated by the regulating means, and all or part of the separated developer separated from the spikes of the developer is received, and the received separated developer is received. 2. The developing device according to claim 1, wherein a guide member for guiding in a direction away from the developing sleeve is provided substantially below the regulating means. 6. The guide member is arranged at one end of the guide member with reference to a position of a conveying screw that is arranged adjacent to the developing sleeve and that conveys the developer while stirring the developer in an axial direction of the developing sleeve. 6. The developing device according to claim 4, wherein the portion is formed so as to extend above a side different from the side where the developing sleeve exists. 7. The developing device according to claim 4, wherein the regulating means is made of an ABS resin material, and the guide member is made of a stainless material. 8. The regulating means has a step formed on the side facing the developing sleeve, or an inclined surface inclined upward toward the upstream side with respect to a horizontal plane, and the step or inclined surface is 6. The developing device according to claim 4, wherein the amount of the separated developer is larger than that in the case where it is not formed. 9. The guide member includes a mounting portion to which the regulating means is mounted, and a guide portion for guiding the separated developer in a direction away from the developing sleeve. The mounting portion and the guide portion thereof. 5. An opening for allowing the formation of a spike of the developer is formed between the upstream side of the regulating means.
The developing device described. 10. The phenomenon device according to claim 9, wherein the opening of the guide member is formed in a region substantially facing the magnetic pole of the magnet roller. 11. The guide member has a mounting portion to which the regulating means is mounted, and a guide portion for guiding the separated developer in a direction away from the developing sleeve. The mounting portion and the guide portion thereof. 6. An opening for allowing the formation of a spike of the developer is formed on the upstream side of the regulating means.
The developing device described. 12. The major axis direction of the opening is substantially parallel to the rotational axis direction of the developing sleeve, and the length of the opening based on the major axis direction is the developing sleeve of the developing sleeve. The developing device according to claim 9 or 11, wherein the developing device is formed to have substantially the same length as the direction of the rotation axis. 13. A developing sleeve for supplying toner to the surface of a photoconductor, a spike-cutting member provided in the vicinity of the surface of the developing sleeve, and a position of the spike-cutting member based on the rotation direction of the developing sleeve. Upstream side and at a position adjacent to the bristle cutting member, and a regulating means for regulating the tip of the developer so as to incline to the upstream side, based on the magnetic force of the developing sleeve and the rotation of the developing sleeve. The developing device is characterized in that the regulating portion of the regulating means is arranged inside the area of the rising edge of the developer formed as described above.