JP5955078B2 - Developer storage unit and process cartridge - Google Patents

Description

  The present invention relates to a developer storage unit that is used in an image forming apparatus such as a printer, a copy, and a fax machine, and has a seal configuration for preventing toner leakage, and a process cartridge including the developer storage unit.

  A plurality of seal members are affixed to a process cartridge having a photosensitive drum used in the image forming apparatus and a process unit acting on the photosensitive drum, mainly for the purpose of preventing toner leakage.

  Conventionally, a sponge-like sealing member such as foamed urethane foam is used as a toner leakage prevention seal. One surface of the seal member is provided with a double-sided tape as an adhesive, and the seal member is affixed to a component of the casing of the process cartridge by the double-sided tape.

  These sealing members have various shapes according to the use of the process cartridge and the state of the internal space of the image forming apparatus. The seal member is attached to a gap between at least one seal end face and a wall of a component part inside the housing installed at a position facing the seal end face with a predetermined width (about 0.3 to 0.5 mm) or less. Attached. After being affixed, the seal member compresses the seal member with another component from the direction in which the seal member or the predetermined gap is pushed in, thereby deforming the entire seal member and reducing the gap, thereby preventing toner leakage. The structure to be taken is taken.

JP 08-030167

  With the recent high quality cartridges and finer images, the toner particle size used has become smaller than before.

  Therefore, it has been required to further reduce the gap S between the end face of the toner leakage prevention seal and the wall of the component part inside the housing. This is because the conventional gap of about 0.3 to 0.5 mm cannot prevent toner leakage and causes toner leakage from the container.

  On the other hand, if the gap S between the end face of the toner leakage prevention seal and the wall of the component part inside the housing is affixed in a negative direction, the double-sided tape runs on the wall, wrinkles, or a new gap below the double-sided tape. May occur. (The direction in which a gap is generated between the seal end face and the wall of the component inside the housing is positive.) If a new gap is generated, toner leakage occurs from the gap.

  Thus, although it is desirable that the gap S between the seal member and the housing is as small as possible or not, in the case of a seal with a double-sided tape as an adhesive on the lower surface of the seal member as in the past, It was difficult to stick the gap S constantly and stably.

  The present invention is a countermeasure against these problems, and an object thereof is to provide a toner sealing seal configuration having high sealing performance.

In order to achieve the above object, a typical configuration of a developer storage unit according to the present invention includes a housing configured to be detachable from an image forming apparatus, and a developer storing the developer inside the housing. agent and containing portion, have a seal member for sealing the pre-Symbol developer accommodating portion includes an elastic member extending longitudinally sealing a gap between said developer accommodating portion, said housing said elastic member An adhesive layer that adheres to a mounting seating surface of the body, and a non-adhesive region in which the adhesive layer is not disposed is formed at an end in the longitudinal direction of the elastic body, and the end of the elastic body In the developer containing unit attached in a compressed state with respect to the vertical surface rising from the seating surface in the vertical direction, a mark is provided in the longitudinal direction of the elastic body, a reference line is provided on the mounting seating surface, The distance from the longitudinal end to the mark is The elastic body is configured to be longer than the distance from the rising surface to the reference line on the seating surface, and the mark and the reference line coincide with each other when the seal member is attached to the mounting seat surface. Is compressed .

  With the above-described configuration, it is possible to provide a toner sealing seal configuration with high sealing performance.

1 is a cross-sectional view illustrating a schematic configuration of an image forming apparatus. Sectional drawing which shows the cross section of a drum unit. The perspective view which shows the external appearance of a drum unit. The side view which shows the external appearance of a drum unit. The bottom view which shows the external appearance of a drum unit. FIG. 6 is a cross-sectional view illustrating a state where a toner sealing seal is attached to a casing frame. The perspective view which shows the state which affixed the toner sealing seal of 1st Embodiment on the casing frame. The side view which shows the state which compressed and stuck the toner sealing seal on the wall surface of the casing frame. The perspective view which shows the state which affixed the toner sealing seal of 2nd Embodiment on the casing frame. FIG. 10 is a perspective view illustrating a modified example of the toner sealing seal according to the second embodiment. FIG. 6 is an enlarged perspective view of a recess provided in a part of a toner seal seal according to a second embodiment.

[First Embodiment]
Embodiments of the present invention will be described with reference to the drawings.

(Image forming device)
FIG. 1 is a cross-sectional view showing a schematic configuration of the image forming apparatus. As shown in FIG. 1, in the present embodiment, a copying machine will be exemplified and described as the image forming apparatus 1.

  The image forming apparatus 1 includes a plurality of process cartridges 11 (image forming units). Each process cartridge 11 forms, for example, a toner image of each color of yellow (Y), magenta (M), cyan (C), and black (Bk). In FIG. 1, since the four process cartridges 11 have the same configuration, only the yellow (Y) process cartridge 11 is denoted by a reference numeral. Further, in the following description, the symbols (Y, M, C, K) indicating colors are omitted unless particularly necessary.

  The process cartridge 11 is unitized and configured to be detachable from the main body of the image forming apparatus 1. The process cartridge 11 has a photosensitive drum 12 (image carrier) of an electrophotographic photosensitive member. A primary charger 13, a developing unit 14, and a drum cleaner 40 are disposed around the photosensitive drum 12. An exposure apparatus 10 that has a polygon mirror or the like and irradiates laser light is disposed below all the photosensitive drums 12.

  Further, an intermediate transfer belt 16 (intermediate transfer member) is disposed above all the process cartridges 11 so as to contact all the photosensitive drums 12. The intermediate transfer belt 16 is stretched around a plurality of rollers to constitute an intermediate transfer belt unit 18.

  With the above schematic configuration, image formation is performed as follows.

  A yellow image signal is sent from the outside to the image forming apparatus 1. Then, an electrostatic latent image corresponding to the image signal is formed on the photosensitive drum 12 uniformly charged by the primary charger 13. The electrostatic latent image is formed by laser light irradiated through a polygon mirror or the like in the exposure apparatus 10. Next, yellow toner is supplied from the developing unit 14 to the electrostatic latent image. As a result, a yellow toner image is developed and visualized on the photosensitive drum 12 corresponding to yellow.

  As the photosensitive drum 12 rotates, the yellow toner image reaches a primary transfer portion where the photosensitive drum 12 and the intermediate transfer belt 16 come into contact with each other. Here, when a primary transfer bias is applied to the primary transfer member 19, the yellow toner image on the photosensitive drum 12 is transferred (primary transfer) to the intermediate transfer belt 16.

  The portion of the intermediate transfer belt 16 carrying the yellow toner image moves onto the photosensitive drum 12 of the adjacent image forming unit (in this embodiment, a magenta process cartridge). By then, a magenta toner image has been formed on the photosensitive drum 12 corresponding to magenta by the same process as the development of the yellow toner image described above. Therefore, the magenta toner image is superimposed and transferred onto the yellow toner image.

  Similarly, as the intermediate transfer belt 16 moves, a cyan toner image and a black toner image are sequentially superimposed and transferred onto the yellow toner image and the magenta toner image at the primary transfer portion of each image forming unit.

  On the other hand, the recording material P is stored in the cassette 30. The recording material P is fed one by one from the cassette 30 by the pickup roller 31. The fed recording material P is matched with the timing of image formation in the registration roller 28. Thereafter, the recording material P reaches the secondary transfer portion sandwiched between the intermediate transfer belt 16 and the secondary transfer roller 17. Here, the four-color toner images on the intermediate transfer belt 16 are collectively transferred onto the recording material P by the secondary transfer bias applied to the secondary transfer roller 17 (secondary transfer portion) (secondary transfer). Is done.

  The recording material P to which the four color toner images have been transferred is guided by a conveyance guide and conveyed to a fixing device 20 (fixing unit) disposed above the secondary transfer roller 17, and heat and Under pressure. As a result, the toner of each color is melted and mixed, whereby a full-color toner image is fixed on the recording material P.

  Thereafter, the recording material P on which the toner image is fixed is guided by a conveyance guide and is discharged onto the discharge tray 23 by discharge rollers 25 (discharge members) provided at a plurality of locations downstream of the fixing device 20 in the recording material conveyance direction. Discharged.

  In the single-side mode in which image formation is performed on one surface of the recording material P, the recording material P on which an image is formed on one surface is discharged onto the discharge tray 23 by the discharge roller 25 as described above. .

  On the other hand, in the double-sided mode in which image formation is performed on both sides of the recording material P, the recording material P on which the image is formed on one side as described above is reversed through the double-sided path, It is conveyed to the registration roller 22. Thereafter, the recording on the back side is completed by the same image forming process as the front side recording, and the recording material P on which the images are formed on the front and back sides is discharged onto the discharge tray 23 by the discharge roller 25.

  Since the process cartridge 11 and the intermediate transfer belt unit 18 have a shorter life than the image forming apparatus 1 due to their properties, the process cartridge 11 and the intermediate transfer belt unit 18 need to be replaced in order to achieve the main body life. Therefore, both the process cartridge 11 and the intermediate transfer belt unit 18 can be freely attached and detached to improve maintenance.

  The transfer residual toner on the photosensitive drum 12 is collected by the drum cleaner 40, and the transfer residual toner on the intermediate transfer belt 16 is collected by the belt cleaner 21.

(Process cartridge)
Next, the process cartridge 11 of this embodiment will be described. The process cartridge 11 of the present embodiment is a so-called separate type. That is, as shown in the black Bk process cartridge 11 in FIG. 1, the process cartridge 11 is configured by combining two separate units (developer containing units), a drum unit 11A and a developing unit 11B. Here, the drum unit 11 </ b> A includes the photosensitive drum 12, the primary charger 13, and the drum cleaner 40, and the developing unit 11 </ b> B includes only the developing unit 14.

  The process cartridge is not limited to a separate type. For example, a process cartridge in which the developing unit 14 (developer), the photosensitive drum 12, the primary charger 13, the drum cleaner 40, a transfer residual toner container, and the like are integrated may be used.

  Next, each unit configuration will be described. First, the outline of the developing unit used in the developing unit 11B will be described, and then the detailed configuration of the drum unit 11A having the characteristic part of the present invention will be described.

  With the development of color, developing devices have a one-component and two-component development system, and for color toners, two-component developers in which the toner and the carrier are separated are widely used from the viewpoint of color development. On the other hand, in the black developing device, a one-component developer is used in order to meet the demand for miniaturization and space saving, and a two-component developer is used in a high-speed machine. Furthermore, the ratio of monochrome images to color images in the market is predominantly monochrome images. Therefore, it is desirable that the durability of the black developer is longer than that of the color developer.

  On the other hand, more faithful drawing performance is required for color images, and image forming apparatuses having a photographic quality level are being developed. Therefore, it is desirable that the toner used has as small a particle size as possible, the shape thereof is a sphere, and the diameter of the toner particles is uniform. Further, in the market, there is a demand for reducing maintenance costs by extending the life of regular replacement parts for reducing running costs.

  In recent years, the development device has adopted ACR (auto carrier refresh) means and the diameter of the developing sleeve to suppress the deterioration of the developer and to extend the life, and approximately 500,000 A4-size originals can be printed. Color developing devices are provided. Therefore, such a developing device can be used as the developing unit 11B.

  Next, the drum unit 11A of the process cartridge 11 according to the present embodiment will be described with reference to FIGS. FIG. 2 is a sectional view showing a section of the drum unit. 3A and 3B are perspective views showing the external appearance of the drum unit, where FIG. 3A is a view seen from the upper left side, and FIG. 3B is a view seen from the upper right side. FIG. 4 is a side view showing the appearance of the drum unit. FIG. 5 is a bottom view showing the appearance of the drum unit. 2 to 5, the developing unit 11B having the developing unit 14 is omitted. The developing unit 14 stores the developer in a developer storage unit inside the developing unit 11 </ b> B, and supplies the developer to the photosensitive drum 12.

  As shown in FIGS. 2 to 5, the drum unit 11 </ b> A is configured by integrally assembling the photosensitive drum 12, the primary charger 13, and the drum cleaner 40 to the casing frame 50 (housing).

  As the photosensitive drum 12, a drum having a diameter of about 30 mm is generally used. The drum cleaner 40 has a cleaning blade 41 made of a plate-like urethane rubber material. The cleaning blade 41 urges the surface of the photosensitive drum 12 to scrape residual toner on the surface of the photosensitive drum 12. The transfer residual toner scraped off by the cleaning blade 41 falls by its own weight into a developer accommodating portion where the toner conveying screw 42 is provided, and is conveyed to the developer collecting portion 47 by the toner conveying screw 42.

  In the conventional monochrome image forming apparatus, the cleaning blade 41 is generally screw-fixed to a metal stay (not shown) provided in a housing or a casing. However, if the PV value is lowered by lowering the pressure applied to the cleaning blade 41 as a measure for increasing durability, the wear rate is reduced by that amount and the life is extended. By adopting this measure, the life of the cleaning blade 41 is about 50,000 sheets for A4 original passing. For this reason, as the cleaning blade 41 of the present embodiment, a swing type cleaning blade having a stable cleaning performance is adopted.

  The casing frame 50 of the process cartridge 11 is a resin molded product using a material in which about 20 to 30% of mica compound is used for polycarbonate and polystyrene. The casing frame 50 is provided with a through hole at a position coinciding with the center of the photosensitive drum 12, and a shaft support member such as a bearing (not shown) or a sintered bearing is provided here. A drum shaft 44 is inserted into the through hole, and the photosensitive drum 12 is pivotally supported with high accuracy so as to be rotatable. Further, the drum shaft 44 is brought into contact with the inner surface of the drum by a contact provided inside the photosensitive drum 12, is electrically connected, and is connected to the ground.

  As shown in FIG. 2, the cleaning blade 41 is bonded to and integrated with the cleaning blade holding plate 43. The cleaning blade holding plate 43 is formed by pressing a steel plate (for example, a gin-coated steel plate).

  The cleaning blade holding plate 43 has a reinforcing plate 45. The reinforcing plate 45 is fastened to the casing frame 50 by screws from the inside of the casing frame 50. The reinforcing plate 45 prevents the cleaning blade 41 from being bent due to pressurization. Both ends in the longitudinal direction of the cleaning blade holding plate 43 are bent so as to be assembled to the casing frame 50. A swing center hole is provided on the surface of the casing frame 50 facing the bent portion. Thereby, the cleaning blade holding plate 43 is configured to be swingable, and the cleaning blade 41 assembled to the cleaning blade holding plate 43 is also configured to be swingable.

  As described above, the cleaning blade 41 configured to be swingable with respect to the casing frame 50 is moved against the photosensitive drum 12 by the urging member 46 disposed on the casing frame 50 on the side facing the photosensitive drum 12. And urged at a desired pressure.

  Further, the cleaning blade holding plate 43 and the casing frame 50 are sealed with a toner sealing seal 60 (seal member). As a result, the transfer residual toner scraped off by the cleaning blade 41 and collected in the developer collecting unit 47 is configured not to leak into a portion where the other unit of the drum unit 11A such as the primary charger 13 is provided. The Next, the toner sealing seal 60 will be specifically described.

(Toner sealing seal)
The toner sealing seal 60 of the first embodiment will be described. FIG. 6 is a cross-sectional view showing a state in which the toner sealing seal is attached to the casing frame. FIG. 6 is an enlarged view of the periphery of the toner sealing seal 60 of FIG.

  As shown in FIG. 6, the toner sealing seal 60 of the present embodiment has an adhesive layer having a multilayer structure under an elastic body 61 extending in the longitudinal direction. The adhesive layer includes a double-sided tape 62 (first double-sided adhesive layer), a base material 63 (base material layer), and a double-sided tape 64 (second double-sided adhesive layer).

  The elastic body 61 is composed of a member such as malt plain. The double-sided tape 62 is adjacent to the elastic body 61 and the base material 63 and has the same width as the elastic body 61 so that the elastic body 61 and the base material 63 are bonded and fixed. The base 63 is made of a resin material such as a PET seal. The double-sided tape 64 is an adhesive that is adjacent to the base 63 and has the same width as the base 63, and adheres and fixes the base 63 to the mounting seat surface 54 of the casing frame 50.

  The toner sealing seal 60 is compressed and affixed between the cleaning blade holding plate 43 and the casing frame 50 that are integrally formed with the swing type cleaning blade 41 by the above-described configuration. As a result, the transfer residual toner scraped off by the cleaning blade 41 is sealed inside the developer recovery unit 47 between the cleaning blade holding plate 43 and the casing frame 50.

  FIG. 7 is a perspective view showing a state in which the toner sealing seal of the first embodiment is attached to the casing frame.

  In the first embodiment, as shown in FIG. 7, the end portion in the longitudinal direction of the toner sealing seal 60 is in close contact with the abutting surface 51 (rising surface) rising in the vertical direction with respect to the attaching seating surface of the casing frame 50. It will be abutted. As a result, the space between the abutting surface 51 of the casing frame 50 and the end surface of the toner sealing seal 60 is sealed.

  FIG. 8 is a side view showing a state in which the toner sealing seal is compressed and attached to the wall surface of the casing frame. (A) is a figure before compression, (b) is a state diagram at the time of compression, (c) is a figure before compression of the modification of the present case, and (d) is a state diagram at the time of compression of the modification of the present case.

  As shown in FIG. 8A, the toner sealing seal 60 is intentionally provided with a non-adhesive area A to which the double-sided tape 62 and the double-sided tape 64 are not attached at one end thereof. Then, the end portion of the toner sealing seal 60 is easily compressed against the abutting surface 51. When the toner sealing seal 60 is compressed in this state, the elastic body 61 of the toner sealing seal 60 is elastically deformed (see the elastic deformation portion 61A) as shown in FIG. Fill the gap.

  In this way, smooth compression at the end of the toner sealing seal 60 does not run over the abutting surface 51, cause wrinkles, or generate a gap under the toner sealing seal 60. Therefore, the toner sealing seal 60 reliably seals the gap between the cleaning blade holding plate 43 and the casing frame 50 and prevents toner leakage. Further, the sealing performance between the abutting surface 51 of the casing frame 50 and the toner sealing seal 60 can be improved.

  In the present embodiment, nothing is disposed in the non-adhesion area A. However, as shown in FIG. 8C, the non-adhesion area A has no adhesion to the mounting seat surface 54 and is elastic. It is good also as a structure which has the inclusion 70 which deform | transforms integrally with the toner sealing seal | sticker 60. FIG. In this case, when the toner sealing seal 60 is compressed, the elastic body 61 and inclusions 70 of the toner sealing seal 60 are elastically deformed as shown in FIG. 8D (elastic deformation portion 61A and inclusion 70). See), and fill the gap in the non-adhesive region A.

  Further, when considering assembly mass productivity, it is necessary to stably and constantly affix the toner sealing seal 60 to the abutting surface 51 of the casing frame 50 by a certain amount or more. For this reason, it has the following structure.

  That is, as shown in FIG. 7, the mounting seat surface 54 of the casing frame 50 is formed with a marking line 55 (reference line) that serves as a guide for the amount of compression of the toner sealing seal 60, while the elastic body 61 has A recess E is formed.

  Here, the distance from the end in the longitudinal direction of the elastic body 61 to the recess E serving as a mark is configured to be longer than the distance from the abutment surface 51 to the marking line 55 in the mounting seat surface 54 of the casing frame 50. .

  For this reason, the elastic body 61 is compressed by a desired compression amount by matching the positions of the recess E of the elastic body 61 and the marking line 55 of the casing frame 50. As a result, it is possible to always compress and affix a certain amount or more, suppress affixing variation, and effectively seal the gap between the developer accommodating portion and other portions.

  In addition, although the example which provides the recessed part E as a mark in a part of the toner sealing seal | sticker 60 was shown, if it becomes a mark, shapes other than the recessed part E may be sufficient and any other method may be used.

[Second Embodiment]
A second embodiment will be described with reference to the drawings. The same components as those described above are denoted by the same reference numerals and description thereof is omitted. FIG. 9 is a perspective view showing a state in which the toner seal seal of the second embodiment is attached to the casing frame. An overall view is shown in (a), and an enlarged view of the seal joint D is shown in (b).

As shown in FIG. 9A, the toner sealing seal 65 according to the second embodiment is divided into two parts with a seal joint D at a substantially center in the thrust direction (longitudinal direction) as a boundary. The toner sealing seal portion 66 and the toner sealing seal portion 67 which are divided into two are respectively provided to the abutting surface 51 and the abutting surface 52 (rising upper surface) that rise perpendicularly to the mounting seat surface 54 of the casing frame 50. It is abutted so that it adheres closely. As a result, the abutting surface 51 and the abutting surface 52 of the casing frame 50 are sealed between the toner sealing seal 65 and both ends of the toner sealing seal 65 are sealed.

Similarly to the above-described embodiment, a non-adhesive region A where the double-sided tape 62 and the double-sided tape 64 are not attached is intentionally provided at one end of each of the toner sealing seal portion 66 and the toner sealing seal portion 67 . Then, the end portion of the toner sealing seal 65 is easily compressed with respect to the abutting surface 51 and the abutting surface 52. Accordingly, the end portions of the toner sealing seal portion 66 and the toner sealing seal portion 67 on the non-adhesion region A side can be compressed and brought into close contact with the abutting surface 51 and the abutting surface 52. Thereby, the sealing performance between the abutting surface 51 and the abutting surface 52 of the casing frame 50 and the toner sealing seal 65 can be improved.

  Moreover, as shown to Fig.9 (a), the seal | sticker junction part D divided | segmented into 2 is formed in the L shape so that each may be mutually combined. The toner sealing seal 65 is attached by being compressed between the cleaning blade 41 and the casing frame 50 as in the above-described embodiment. Therefore, the L-shaped seal joints D of the toner sealing seal part 66 and the toner sealing seal part 67 are also compressed as shown in FIG. 9B. Thus, the sealing property of the seal | sticker junction part D is maintained because two L-shaped surfaces which oppose in the seal | sticker junction part D are compressed and closely_contact | adhered.

  Further, the toner sealing seal 65 has a two-divided configuration and is configured such that both end surfaces are compressed and attached, so that a dimensional error in the longitudinal direction of the toner sealing seal 65 can be absorbed. In addition, by forming an L shape, the toner sealing seal 65 can be securely adhered in both the longitudinal direction and the short direction of the toner sealing seal 65.

  In the present embodiment, the divided seal joint portion D is an L-shaped example. However, the present invention is not limited to this, and the relative surfaces of the two divided toner sealing seal portions 66 and 67 are compressed. In this case, any shape may be used as long as the configurations are sufficiently compressed. FIG. 10 is a perspective view showing a modified example of the toner sealing seal of the second embodiment. (A) shows the state before compression, and (b) shows the state during compression. For example, as shown in FIG. 10, it is good also as the seal | sticker junction part D1 of the shape notched diagonally so that it might mutually combine. At the time of compression, there is no gap in the seal joint D1 as shown in FIG.

  As described above, the toner sealing seal 65 is sealed to ensure sealing performance. For this reason, the material of the toner sealing seal 65 needs to be an elastic body such as malt plain.

  As in the above-described embodiment, the toner sealing seal 65 is compressed and attached to the abutting surfaces 51 and 52. In this way, the end portion of the toner sealing seal 65 is compressed and attached, so that it does not ride on the abutting surface 51 and the abutting surface 52, wrinkles, or generate a gap under the toner sealing seal 65. . Therefore, the toner sealing seal 65 reliably seals the gap between the cleaning blade holding plate 43 and the casing frame 50 and prevents toner leakage.

  Also in the present embodiment, it is necessary to stably and constantly affix the toner sealing seal 65 to the abutting surface 51 and the abutting surface 52 of the casing frame 50 by a certain amount or more. FIG. 11 is an enlarged perspective view of a recess provided in a part of the toner seal seal of the second embodiment.

  As shown in FIG. 11, a marking line 55 is formed on the mounting seat surface 54 of the casing frame 50, and a recess E is formed in each of the toner sealing seal portion 66 and the toner sealing seal portion 67.

  With such a configuration, using the marking line 55 of the casing frame 50 shown in FIG. 9 as a mark, the toner sealing seal portion 66 reaches a position where the recess E of the toner sealing seal portions 66 and 67 matches the marking line 55. To compress. After confirming that the toner sealing seals 66 and 67 are adhered to the mounting seat surface 54, it is ensured that the toner sealing seal 65 is compressed by a certain amount or more.

[Other Embodiments]
In the above-described embodiment, the seal configuration that seals between the drum cleaner 40 having toner and the primary charger 13 not having toner has been described, but the present invention is not limited thereto, and a portion having toner, Any portion that seals a portion having no toner may be used. For example, it is good also as a seal structure of the image development part 14 and its adjacent part.

  In the above-described embodiment, the developer accommodating portion sealed by the toner sealing seal is the developer collecting portion 47 in the drum unit 11A. However, the present invention is not limited to this. The developing container in the developing unit 11B may be a developer container, and the developing container may be sealed with a toner sealing seal.

A ... Non-adhesion area E ... Recess 1 ... Image forming apparatus 11 ... Process cartridge 11A ... Drum unit 11B ... Developing unit 14 ... Developing unit 47 ... Developer collecting unit 50 ... Casing frame 51 ... Abutting surface 52 ... Abutting surface 54 ... Mounting seat Surface 55 ... marking line 60 ... toner sealing seal 61 ... elastic body 62 ... double-sided tape 63 ... substrate 64 ... double-sided tape 65 ... toner sealing seal 66 ... toner sealing seal part 67 ... toner sealing seal part

Claims (4)

A housing configured to be detachable from the image forming apparatus;
A developer accommodating portion for accommodating the developer inside the housing;
I have a,
The sealing member for sealing the developer accommodating portion is
An elastic body that extends in the longitudinal direction and seals the gap between the developer accommodating portions;
An adhesive layer that bonds the elastic body to the mounting seating surface of the housing;
Have
A non-adhesive region where the adhesive layer is not disposed is formed at an end portion in the longitudinal direction of the elastic body,
In the developer containing unit attached to the end of the elastic body in a compressed state with respect to the rising surface rising in the vertical direction from the mounting seat surface,
A mark is provided in the longitudinal direction of the elastic body ,
A reference line is provided on the mounting seat surface ,
The distance from the end in the longitudinal direction of the elastic body to the mark is configured to be longer than the distance from the rising surface to the reference line on the mounting seat surface ,
The developer accommodating unit , wherein when the seal member is attached to the attachment seat surface, the elastic body is compressed so that the mark coincides with the reference line . The adhesive layer of the seal member has a multilayer structure,
A first double-sided adhesive layer adjacent to the elastic body;
A base material layer formed of a resin material adjacent to the first double-sided adhesive layer;
A second double-sided adhesive layer adjacent to the base material layer and adhered to the mounting seat surface;
The developer accommodating unit according to claim 1, comprising:   2. The developer accommodating unit according to claim 1, wherein the non-adhesive region is configured by disposing an inclusion between the adhesive layer and the rising surface. An image carrier;
A developer accommodating portion for accommodating the developer;
Have
A process cartridge having a developing unit for supplying a developer to the image carrier or a developer collecting unit for collecting the developer from the image carrier;
The developer accommodating unit, a process cartridge, which is a developer container according to any one of claims 1 to 3.

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