JPH04156484A - Developer device - Google Patents

Abstract

PURPOSE:To reduce the number of parts to be assembled and to enable their assembling operation to be easily carried out by a method wherein a separator can be installed to a developer case without using any fastening parts in a developer device provided with the separator installed to cause a remained developer agent to be returned to a developer agent storing part. CONSTITUTION:A front plate, a rear plate and a lower case are integrally assembled to form a developer case 110. A separator 109 is fixed to the developer case 110 without using any fastening parts. The separator 109 and a transporting screw 107 are fixed in such a way as a deep end 109a of the separator 109 is held at two deep ribs 110a of the developer case 110 and then a deep projection 109b is inserted into a groove 110b of the developer case 110. Then, an operator's side end 109c of the separator 109 is similarly held between the two operator's side ribs 110c of the developer case 110 and finally the operator's side projection 109d is dropped into the groove 110d and fixed there. With such an arrangement, it is possible to reduce the number of component parts for assembly and to facilitate an assembling work.

Description

[Detailed description of the invention]

[00011

[Industrial application field]

The present invention relates to a developing device using dry toner in a copying machine or the like, and more particularly to a two-component developing device. [0002]

[Conventional technology]

Generally, a developing device includes a developing section and a toner replenishing section, as shown in FIG. The toner supply section supplies toner (not shown) to the developing section.
The agitator 202 has a sheet 202a attached to its tip for wiping the inner wall of the toner cartridge 201. On the other hand, the developing section includes a mixing roller 2 for mixing the toner discharged from the toner cartridge 201 with the carrier.
03, and a developing roller 2 that conveys toner to the photoreceptor 211.
04, a paddle 205 that stirs the developer (toner and carrier) to charge the toner and supplies the developer to the developing roller 204, a conveying screw 206 that equalizes the toner concentration in the developer, and a developing roller. A developing doctor 207 for regulating the developer on the developing doctor 204 and a developing doctor 2
07 and a separator 208 that returns the excess developer regulated by 07 to the accumulation section near the paddle 205. Reference numerals 209 and 210 indicate a developing case and a developing cover that constitute the housing of the developing unit [0003] Next, with reference to FIGS. The assembly of the developing section will be explained. First, as shown in FIG. 13, the developing roller 302. Paddle 303. Place the mixing roller 304, and then as shown in FIG.
05 with the mounting screws 307, hook the separator mounting hole 306a onto the pin 308a protruding from the rear side plate 308, and insert the separator 306 into the groove 30 on the rear side plate 308.
8b, the discharge part 306b of the separator 306 is fitted, the developing doctor 309 is sandwiched between the front side plate 305 and the rear side plate 308, and is attached with four mounting screws 310 to assemble the upper case part. Thereafter, the upper case portion is attached to the lower case 301 using three attachment screws 311. Here, the conveyance screw 312 disposed inside the separator 306 is connected to the rear side plate 3
・Insert the bearing 31 from the outside into the mounting hole 308b provided in 08.
3 and insert it into the bearing hole 30 of the front plate 305.
5a with an E ring 314, and the rear plate side (drive side) is equipped with bearings 3] and 5 and gear 316. E-ring 3] 7
It can be attached by stopping at 7.

【○004】

[Problem to be solved by the invention]

However, according to the conventional developing device, the separator is attached to the front plate (or rear plate) using mounting screws, which has the problem of requiring a large number of assembly parts such as mounting screws, resulting in high costs. Ta. In particular, with the type that attaches to both side plates using mounting screws, it is necessary to insert a separator between the front side plate and the rear side plate and attach with the mounting screws, which increases the number of parts to be assembled.
Another problem was that the assembly process was complicated. [0005] Furthermore, according to the conventional developing device, the developing case is formed by assembling the upper case portion, which includes the front side plate, the rear side plate, the separator, the developing doctor, etc., and the lower case.
When replacing the developing roller due to defective parts or the like, it is necessary to remove the upper case portion and disassemble the developing case, which also poses a problem in that replacing the developing roller is troublesome. [0006] Furthermore, according to the conventional developing device, the center of the developing roller is formed on the dividing surface of the front side plate 2, the rear side plate, etc., and the developing doctor is screwed to the front side plate and the rear side plate, respectively. There was also a problem in that it was difficult to set the gap between the developing roller and the developing doctor, and the gap varied. [0007] Furthermore, if it is necessary to open the developing case due to defective parts of the developing roller, etc., it is necessary to remove the upper case part to which the developing doctor is attached and disassemble the developing case. There was also the problem that it was necessary to adjust the gap between the developing doctors. [0008]Furthermore, according to the conventional developing device, the toner tank is made into a cartridge in order to facilitate maintenance. Since it is necessary to provide a member such as a sponge or a slitter, there are problems in that the number of parts increases, and the device becomes complicated, large-sized, and costly. [0009] The present invention has been made in view of the above, and a first object thereof is to be able to reduce the number of parts for assembly and to facilitate assembly. Further, the present invention has been made in view of the above, and a second object of the present invention is to facilitate the attachment and detachment of the developing roller. [0010] Further, the present invention has been made in view of the above, and a third aspect of the present invention is that the developing roller can be easily attached and detached, and the gap between the developing roller and the developing doctor can be easily set.
The purpose of [00111] Furthermore, the present invention has been made in view of the above, and it is possible to easily set the gap between the developing roller and the developing doctor, and also eliminates the need to readjust the gap even when the developing roller is attached or detached. The fourth purpose is to avoid [001,2] Furthermore, the present invention has been made in view of the above, and a fifth object of the present invention is to simplify, downsize, and reduce the cost of the device.
The purpose of [0013]

[Means to solve the problem]

In order to achieve the above-mentioned first object, the present invention provides a developing device equipped with a separator that is provided so as to return surplus developer regulated by a developing doctor to a developer accumulation section. It is an object of the present invention to provide a developing device having a structure that can be attached to a developing case without using a developing device. [0014] Furthermore, in the above-described configuration, it is desirable that the span of the part where the separator is attached to the developing case be longer than the span between the side plates of the developing case. Further, in the above-described configuration, it is desirable that the developing case is formed by integrating the lower case and both side plates. [0015] In a developing device equipped with a roller and a developing doctor that regulates the developer to a certain layer thickness, the lower case and both side plates are integrated to constitute a developing case, and the developing roller is attached to the developing case. To provide a developing device in which the shape of the developing case in which both ends of the developing roller are placed is such that the developing roller can be removed even when a developing doctor is attached to the developing case. . [0016] In the above-described configuration, when the developing roller is installed, the developing roller is placed opposite to the developing roller end surface of the developing case so that one end surface of the developing roller shaft and the developing roller end surface are accommodated in the developing roller side opening of the developing case. It is desirable to provide a developing roller shaft accommodating portion with a recessed shape on the side plate side. [0017] In order to achieve the above-mentioned third object, the present invention provides a developing roller with a built-in magnet, a line connecting the center of the photoreceptor and the center of the developing roller, and a line connecting the developing pole and the center of the developing roller. In a developing device equipped with a developing case equipped with an angle (main pole angle) setting section, when installing the developing roller, one end surface of the developing roller shaft and the end surface of the developing roller fit into the opening on the developing roller side of the developing case. As shown in the figure, there is a developing roller shaft accommodating part in the shape of a single step provided on the side plate side facing the end surface of the developing roller of the developing case, and a main pole angle setting which is arranged in a shape that is even more concise than the developing roller shaft accommodating part. The present invention provides a developing device equipped with a. [0018] Further, in the above-described configuration, the distance between the developing roller end surface of the side plate opposite to the main pole angle setting section and the opposite side plate is made larger than the distance between the main pole angle setting section side plate and the developing roller end surface, and When the holder member equipped with the developing roller bearing is attached, it is desirable that the distance from the end face of the developing roller be approximately equal. [0019] In order to achieve the above-mentioned fourth object, the present invention includes a developing roller with a built-in magnet and a developing doctor that regulates the developer to a certain layer thickness, and integrates the lower case and both side plates. In the developing case configured as above, the developing doctor mounting surface is provided within an angle of 50° or more and 80° or less from the horizontal, and the angle between the mounting surface of the developing doctor to the developing case and the line connecting the developing port and the tip on the rear side. The present invention provides a developing device in which the angle of the developing doctor mounting surface is approximately equal to the angle of the developing doctor mounting surface. Further, in the above-described configuration, it is desirable that the developing doctor mounting surface be configured downstream from the extension line of the mounting surface angle from the center of the developing roller. [00201] In order to achieve the above-mentioned fifth object, the present invention provides a developing device equipped with a developing section consisting of a developing roller etc. and a toner replenishing section having a rotatable agitator. The present invention provides a developing device in which a toner discharge port for replenishing toner to a portion thereof is a microhole. [00211] Furthermore, in the above-described configuration, it is desirable to arrange a plurality of rows each having a plurality of microholes. Further, in the above-described configuration, it is desirable to provide a step between the microhole and the inner wall of the toner supply section. Furthermore, in the above-described configuration, it is desirable that micro holes be provided in the sheet member and attached to the outer wall of the toner supply section. [0022]

[Effect]

In the developing device of the present invention, a front side plate, a rear side plate, and a lower case are integrated to form a developing case, and a separator is attached to the developing case without using fastening parts. Further, in the developing device of the present invention, the front side plate, the rear side plate, and the lower case are integrated to form the developing case, and the shape of the developing case in the portion where the developing roller is placed is changed by attaching the developing doctor. The developing roller is shaped so that it can be removed even when the developing roller is in a closed state, making it easy to attach and detach the developing roller. Further, in the developing device of the present invention, the toner discharge port for replenishing toner from the toner replenishing section to the developing section is a microhole, and the toner is directly supplied from the microscopic hole to the developing section [002
3]

【Example】

Hereinafter, one embodiment of the developing device of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a schematic cross-sectional view of the developing device of this embodiment. The developing device is roughly divided into a toner supply section and a developing section. The toner supply section supplies toner (not shown) to the developing section.
Toner hopper 101 filled with
an agitator 102 with a sheath 102a attached to its tip for wiping the inner wall of the agitator 102, and a gage 1.1.03 with a fine hole 103a (see FIG. 2) for discharging toner from the I/ner hopper 101; It consists of [0024] On the other hand, the developing section includes a mixing roller 104 for mixing the toner discharged from the toner hopper 101 with carrier, a developing roller 105 for conveying the toner to the photoreceptor 112, and stirring the developer (toner and carrier). A paddle 106 that charges the toner and supplies developer to the developing roller 105, a conveying screw 107 that equalizes the toner concentration in the developer, and a developing doctor that regulates the developer on the developing roller 105. 108, and a separator 109 that returns surplus developer regulated by the development doctor 108 to an accumulation section near the paddle 106. Furthermore, 1
Reference numerals 10 and 111 indicate a developing case and a developing cover that constitute the housing of the developing section. [0025] Here, with reference to FIG. 2, the minute hole 103a provided in the gate 103 will be described. In this embodiment, a plurality of microholes 103a are arranged in three rows on the gate 103 as shown in the figure. Note that the size, number, etc. of the microholes 103a are set depending on the situation depending on the toner to be used. [0026] Next, with reference to the exploded views of the developing section shown in FIGS. 3 to 6,
The shape and assembly of the developing section will be explained in detail. As shown in FIG. 3, the developing case 110 of this embodiment is constructed by integrating a lower case and both side plates. To assemble the developing section, first, the bearing 113, which is formed by attaching the seal member 11-3b to the sliding bearing 113a, is press-fitted into the case bearing sections 1l-4a, 114b, and 114-c. Next, a seal member I T is attached to the front side 106a of the shaft of the paddle 106.
A bearing 116 is attached to sandwich the developing case 10, and the bearing 116 is set in the recess 117a provided on the front side plate of the developing case 10. Similarly, the narrow front side 104a of the mixing roller 104
Attach the bearing 116 so that the seal 115 is sandwiched between the
This is set in the depressed portion 117b. At this time, paddle 106. For both the mixing roller 104, the bearing 116 side is inserted into the recessed part 118 of the developing case 110, the shaft on the opposite side is inserted into the bearing 113, and finally the bearing 116 is inserted into the recessed part 1 of the developing case 110.
17a and 117b. Therefore, the depressed portion 118 is the depressed portion 117a, 117b.
It has fallen even further. In addition, the bearing 116 has a milled surface shape, and the corresponding shape is 117.
a and 117b, the bearing 116 can be positioned and fixed with respect to the developing case 110. [0027] As shown in FIG. 4, the separator 109 and the conveyance screw 107 are attached to
a between the two rear ribs 110a of the developing case 110, and inserting the rear convex portion 109b into the groove 110b of the developing case 110. Next, the front end 109C of the separator 109 is similarly inserted between the two front ribs 110c (see FIG. 5) of the developing case 1100, and finally the front protrusion 109d is inserted into the groove 110d (see FIG. 5). It is installed so that it can be dropped into.

At this time, the distance L1 between both side plates of the developing case 110 and the distance L2 between the protrusions at both ends of the separator 109 (between 109b and 109d) are LL<L2 (in this embodiment, L 1 = 3 L Omm, L 2 = 313 mm
). [0029] The separator 109 has a bearing 1 for the conveying screw 107.
19 is provided, and to attach the conveyance screw 107, first set the seal member 120 on the front end 107a of the conveyance screw 107, insert it from the rear opening of the separator 109, and make sure that the tip of the end 107a is Set it so that it comes out from the bearing 119. [00301] Next, a method for attaching the developing roller 105 will be explained with reference to FIG. The milled surface 105b of the front shaft 105a of the developing roller 105 is connected to the depressed portion 12 of the developing case 110.
1, and then push it into the main pole positioning part 122 that is lower than the depressed part 121. Next, attach the developing roller bearing 123 to the rear shaft 105C.
The bearing case 1-24 into which is press-fitted is attached from the rear opening 125 side of the developing case 110. Here, the distance between the end surface of the developing roller 105 on the side of the rear shaft 105C and the side plate of the developing case 110 is the main pole positioning section] -22
The distance between the side plate and the end face of the developing roller 105 is larger than that, and when the bearing case 124 into which the developing roller bearing 1-23 is press-fitted is installed, the distance from the end face of the developing roller is approximately equal. It is. [00311] To attach the developing doctor 108, as shown in FIG. 127a and 127b are screwed with mounting screws 128. [0032]Finally, the attachment of each rotating member and each gear will be described with reference to FIGS. 6 and 5. A fish 130 is attached to the mixing roller gear 129. Also, the mixing roller gear 129. Paddle gear 131. Conveyance screw gear 13
2 has a mixing roller 104. Paddle], 06
, each rear shaft portion 104b of the conveyance screw 107
, ], 06b, ], 07b (see FIGS. 3 and 4) are provided with fitting portions 129a, 131a, and 132a. [0033] On the other hand, the developing case 110 includes the bearing 11 as described above.
3 is attached, and furthermore, a mixing roller 104. paddle 106
．． Since the conveyance screw ] 07 is attached, Figure 5
At positions 133, 134, and 135 shown in , there are rear shaft portions 104b, 106b, and 107b of each rotating member, into which the respective gear (7) fitting portions 129a, 131a, and 132a are fitted. Thereafter, the gear cover 136 is attached by fitting the protrusions 136a, 36b, and 136c into holes located at the center of each gear. [0034] FIG. 7 shows a detailed view of the paddle 106 and FIG. 8 shows a detailed view of the mixing roller 104. FIG. 9 shows the mixing roller 10 of FIG.
A diagram of the shaft element front side 104a of No. 4 viewed from the F direction (view F) and a diagram of the back side shaft portion 104b viewed from the direction G (view G) are shown. Note that the thin front side 10 of the force plate paddle 106, which is not shown,
6 a, back side shaft portion 106 b, and conveyance screw 10
The narrow front side 107a and the back side shaft portion 107b of No. 7 have similar configurations. [0035] FIG. 10 is a cross-sectional view showing the relationship between the rotating member, the rear shaft portion, and the gear. Here, paddle 106. Back shaft part 1
06b, the paddle gear 131 is shown as an example, but the mixing roller 104. The relationship between the conveying screw 107, each rear shaft portion, and each gear is also the same. [0036] FIG. 11 shows the developing doctor attachment portion 127b (or 12
7a) shows the angle of the mounting surface to which the developing doctor 108 is attached, and the developing doctor mounting surface is horizontal as shown in the figure,
The angle is set within an angle of 0° or more and 80° or less (65° in this embodiment). Further, the angle formed by the line connecting the mounting surface of the developing doctor 108 to the developing case 110 and the tip on the side of the developing roller 105 is approximately equal to the developing doctor mounting surface angle (65°). By setting within the above angle, the developing doctor 108
In other words, the gap between the developing roller and the developing doctor can be easily set. [0037] Furthermore, in this embodiment, the developing doctor mounting surface of the developing doctor mounting portion 127b (and 127a) is configured to be 1 mm downstream of the extension line of the mounting surface angle from the center of the developing roller. This makes it easy to attach and detach the developing roller 105. The details are omitted, but in order to facilitate the attachment and detachment of the developing roller 105, the angles of each part are set as shown in the figure. [0038] The operation of the toner replenishing section in the developing device of this embodiment will be described with reference to FIGS. 1 and 2. When the toner concentration in the developer becomes low, a predetermined sensor detects this and issues a supply signal, and the agitator 102 is agitated by a drive device (not shown). Agitator 1
02 is agitated and reaches the opening of the toner hopper 101 (the part indicated by W in FIG. 1), the fine hole 10 of the gate 103 is opened.
The toner is discharged from 3a into the developing case 110. Here, in the gate 103, a plurality of microholes 103a are arranged as shown in FIG. 2, and the toner is not discharged in large quantities to one place.
It is uniformly discharged into the developing case 110. [00391] Furthermore, since the sheet 102a has elasticity, the sheet 102a hits the gate 103 by being repelled by the difference in level d (d=1.8 mm in this embodiment) between the inner wall of the toner hopper 101 and the gate 103. Therefore, the toner is discharged by both the pressure when the sheet 1-102a collides with the sheet 1-102a and the pushing force when the sheet 102a wipes the microholes 103a. These forces are applied to the microhole 10 of the gate 103.
It also serves to prevent clogging of 3a. Furthermore, since a plurality of fine 1Jz holes 103a are arranged in the gate 103 and the discharge port has a width, toner is discharged over a wide range as shown by the broken line in FIG. 1, and the discharged toner is used for development. easily mixed into formulations. [0040] For example, fine 1J depending on the situation depending on the toner used.
Connect game 1-103 with X hole 103a to toner hopper 1.
By pasting it on 01, it is possible to provide versatility. [00411] By performing the above-described configuration and assembly, it is possible to easily attach and detach the developing roller 105 even when the developing doctor 108 is installed in the developing case 110, for example. [0042] Furthermore, since the developing case 110 has the above-described shape and the developing roller 105 is mounted using the bearing case 124 into which the developing roller bearing 123 is press-fitted, the developing roller 105 can be easily attached and detached. In addition, the developing roller 105 can be positioned reliably. Furthermore, by making the developing case 110 and the developing doctor 108 into the above-described shapes, the gap between the developing roller 105 and the developing doctor 108 can be easily adjusted, and even when the developing roller 105 is detached, the gap between the developing roller 105 and the developing doctor 108 can be easily adjusted. , it is possible to avoid readjusting the gap. [0043]

【Effect of the invention】

As explained above, the developing device of the present invention is a developing device equipped with a separator that is provided to return surplus developer regulated by a developing doctor to a developer accumulation portion, and the developing device does not use fastening parts to connect the separator. Since it is configured so that it can be attached to the developing case, the number of parts for assembly can be reduced and assembly can be facilitated. [0044] Furthermore, in the above-described configuration, assembly can be further facilitated by making the span of the part where the separator is attached to the developing case longer than the span between the side plates of the developing case. Further, in the above-described configuration, by integrating the lower case and both side plates to form the developing case, assembly can be further facilitated and the number of parts can be reduced. [0045] Further, the developing device of the present invention is a developing device equipped with a developing roller having a built-in magnet and a developing doctor that regulates the developer to a certain constant layer thickness, and in which the lower case and both side plates are integrated. When configuring the case and attaching the developing roller to the developing case, the shape of the developing case where both ends of the developing roller are placed is such that the developing roller does not fit even when the developing doctor is attached to the developing case. Since it has a removable shape, the developing roller can be easily attached and detached. [0046] In the above-described configuration, when the developing roller is installed, the developing roller is placed opposite the developing roller end surface of the developing case so that one end surface of the developing roller shaft and the developing roller end surface are accommodated in the developing roller side opening of the developing case. By providing a developing roller shaft accommodating portion with a recessed shape on the side plate side, it is possible to further facilitate attachment and detachment of the developing roller. [0047] Further, the developing device of the present invention has an angle formed by a developing roller having a built-in magnet, a line connecting the center of the photoreceptor and the center of the developing roller, and a line connecting the developing pole and the center of the developing roller (main pole angle). In a developing device equipped with a developing case equipped with a setting section, when installing the developing roller, make sure that the developing roller shaft is fitted into the developing roller side opening of the developing case so that one end surface of the developing roller shaft and the developing roller end surface fit into the developing roller side opening of the developing case. The developing roller shaft storage part is provided on the side plate side facing the end surface of the developing roller and has a shape that is one step deep, and the main pole angle setting part is arranged in a shape that is one step deeper than the developing roller shaft storage part. The developing roller can be easily attached and detached, and the gap between the developing roller and the developing doctor can be easily set. [0048] Further, in the above-described configuration, the distance between the developing roller end surface of the side plate opposite to the main pole angle setting section and the opposite side plate is made larger than the distance between the main pole angle setting section side plate and the developing roller end surface, and By configuring the holder member provided with the developing roller bearing so that the distance from the end face of the developing roller is approximately equal when the holder member is attached, it is possible to further facilitate attachment and detachment of the developing roller. [0049] Further, the developing device of the present invention includes a developing roller with a built-in magnet and a developing doctor that regulates the developer to a certain constant layer thickness, and a developing case configured by integrating a lower case and both side plates. , the developing doctor mounting surface is set within an angle of 50° or more and 80° or less from the horizontal, and the angle between the developing doctor mounting surface to the developing case and the line connecting the developing roller side tip is abbreviated as the developing doctor mounting surface angle. Since the angles are equal, the gap between the developing roller and the developing doctor can be easily set, and there is no need to readjust the gap even when the developing roller is attached or detached. [00501] Furthermore, in the above-described configuration, by configuring the developing doctor mounting surface on the downstream side of the extension line of the mounting surface angle from the center of the developing roller, the developing roller can be easily attached and detached. [00511] Further, the developing device of the present invention includes a developing section including a developing roller or the like and a toner replenishing section having a rotatable agitator. Since the toner discharge port is formed into a microhole, it is possible to simplify the device into a yJX type device and to reduce costs.

[Brief explanation of the drawing]

[Figure 1] Schematic diagram of the developing device of the present invention

[Figure 2] An explanatory diagram showing the arrangement of microholes provided in the gate.

[Figure 3] FIG. 3 is an explanatory diagram showing the assembly of a paddle and a mixing roller.

[Figure 4] FIG. 3 is an explanatory diagram showing the assembly of a separator and a conveying screw.

[Figure 5] FIG. 3 is an explanatory diagram showing the assembly of the developing roller.

[Figure 6] FIG. 3 is an explanatory diagram showing the assembly of a developing doctor and each rotating member.

[Figure 7] Detailed view of the paddle.

[Figure 8] Detailed view of the mixing roller.

[Figure 9] FIG. 9 is a view of the near side of the axis of the mixing roller of FIG. 8 viewed from the F direction.

FIG. 10 is an explanatory diagram showing the angle of the mounting surface to which the developing doctor of the developing doctor mounting section is attached.

[Figure 11] FIG. 9 is a view of the shaft near side of the mixing roller of FIG. 8 viewed from the G direction.

[Figure 121 FIG. 1 is an explanatory diagram showing the configuration of a conventional developing device. [Figure 13] FIG. 3 is an explanatory diagram showing the assembly of a conventional developing section.

[Figure 14] FIG. 2 is an explanatory diagram showing the assembly of a conventional developing section.

[Explanation of symbols]

101 1-ner hopper 102102a
Sheet 103103a Microhole 104105 Developing roller
106107 Conveyance screw
108109 Separator 1101
11 Developing cover 112113a
Sliding bearing 113b113 bearing
115114a, 114b, 114c
Bearing part 116 Bearing 1
17a. 118 Drop portion 119 Bearing 120121
Recessed part 122123 Developing roller bearing 124125 Back side opening
126127a, 127b Developing tractor attachment part 128 Removal size screw 129130
Fisi 131132
Conveyance screw gear 136136a, 136b,
136c Convex part Agitator Gate Mixing roller Paddle Developing doctor Developing case Photoreceptor seal member Seal member 117b Recessed part Seal member Main pole positioning part Bearing case Seal member Mixing roller gear paddle gear gear cover

[Document color]

drawing

[Figure 1]

[Figure 2]

[Figure 7]

[Figure 8] ■ [Figure 91 [Figure 10] F vision G congratulations stomach

Claims (13)

[Claims] Claim 1: In a developing device equipped with a separator provided to return surplus developer regulated by a developing doctor to a developer accumulation section, the separator can be attached to a developing case without using fastening parts. A developing device characterized by having a configuration. 2. The developing device according to claim 1, wherein a span of a portion of the separator attached to the developing case is longer than a span between both side plates of the developing case. 3. The developing device according to claim 2, wherein the developing case is formed by integrating a lower case and both side plates. 4. A developing device including a developing roller with a built-in magnet and a developing doctor that regulates the developer to a certain constant layer thickness, in which a lower case and both side plates are integrated to constitute a developing case, and When the developing roller is attached to the developing case, the shape of the developing case in which both ends of the developing roller are placed is adjusted such that the developing roller is A developing device characterized by having a removable shape. 5. When installing the developing roller, the side plate side of the developing case opposite to the developing roller end surface is arranged such that one end surface of the developing roller shaft and the developing roller end surface fit into the developing roller side opening of the developing case. 5. The developing device according to claim 4, further comprising a developing roller shaft storage portion having a shape of one step. 6. A developing roller having a built-in magnet, and a developing device provided with a setting section for setting the angle (main pole angle) formed by a line connecting the center of the photoreceptor and the center of the developing roller, and a line connecting the developing pole and the center of the developing roller. In a developing device equipped with a case, when the developing roller is installed, the developing roller is placed opposite to the developing roller end surface of the developing case so that one end surface of the developing roller shaft and the developing roller end surface are accommodated in the developing roller side opening of the developing case. A developing roller shaft housing section provided on a side plate side of the developing roller shaft and having a shape that is one step deep, and a main pole angle setting section that is arranged in a shape that is one step deeper than the developing roller shaft storage section. Developing device. 7. The distance between the developing roller end surface of the side plate opposite to the main pole angle setting section and the opposite side plate is made larger than the distance between the main pole angle setting section side plate and the developing roller end surface, and the developing roller 7. The developing device according to claim 6, wherein when the holder member provided with the bearing is attached, the distance from the end face of the developing roller is approximately equal. 8. A developing case comprising a developing roller with a built-in magnet and a developing doctor regulating the developer to a certain constant layer thickness, and configured by integrating a lower case and both side plates, wherein the developing doctor mounting surface is It is provided within an angle of 50° or more and 80° or less from the horizontal, and is characterized in that the angle formed between the mounting surface of the developing doctor to the developing case and a line connecting the developing roller side tip is approximately equal to the developing doctor mounting surface angle. Developing device. 9. The developing device according to claim 8, wherein the developing doctor mounting surface is configured downstream from an extension line of the mounting surface angle from the center of the developing roller. 10. A developing device comprising a developing section including a developing roller or the like and a toner replenishing section having a rotatable agitator, further comprising a toner discharge port for replenishing toner from the toner replenishing section to the developing section. A developing device characterized by having minute holes. 11. The developing device according to claim 10, wherein a plurality of rows each having a plurality of said microholes are arranged. 12. Claims 10 and 1, characterized in that a step is provided between the microhole and the inner wall of the toner supply section.
1 developing device. 13. Claim 1, wherein the microholes are provided in a sheet member and attached to an outer wall of the toner supply section.
0, the developing device according to claim 11, and claim 12.