JP5595566B2 - Toner cartridge and image forming apparatus incorporating the toner cartridge - Google Patents

Description

  The present invention relates to a toner cartridge that is formed so as to be able to store toner and is detachably attached to an image forming apparatus by a sliding method, and an image forming apparatus incorporating the toner cartridge.

  In an image forming apparatus represented by a copying machine or a printer, a toner cartridge for replenishing toner to a developing device is detachably attached. For example, the toner cartridge is slidably attached to a predetermined portion of the casing of the image forming apparatus. The slidable toner cartridge is pulled out in the horizontal direction with respect to the housing of the image forming apparatus and pushed in. Generally, a grip portion is provided on the end wall of the slidable toner cartridge, and the user can easily pull out the toner cartridge from the casing by grasping the grip portion.

  The toner cartridge may include a shutter mechanism. The shutter mechanism prevents unwanted toner from leaking out before the toner cartridge is attached to the image forming apparatus, after the toner cartridge is removed from the image forming apparatus, or during replacement of the toner cartridge.

  The toner cartridge may include a housing having a toner discharge port, a shutter formed to be able to open and close the toner discharge port, a lever formed to be able to operate the shutter, and a lock member that locks the lever. The lever in the closed position elastically deforms the elastic portion of the lock member and biases the lock member to the closed position. After the housing of the toner cartridge is attached to the housing of the image forming apparatus, the lock by the lock member is released, and the lever can be rotated from the closed position to the open position (see Patent Document 1).

JP 2004-2055887 A

  The lever described above may be exposed from the end wall of the toner cartridge and may be easily contacted by the user. Such a lever has a structure for rotating, and is relatively vulnerable to external force. The toner cartridge is transported alone for replacement. During transport, the levers exposed from the end walls can potentially collide with the building floor, side walls or other equipment. As a result, the function of the lever itself or the rotating mechanism (for example, shutter) connected to the lever is impaired.

  The present invention has been made to solve the above problem, and provides a toner cartridge capable of protecting a lever for operating the toner cartridge from an external force and an image forming apparatus incorporating the toner cartridge. For the purpose.

  A toner cartridge according to an aspect of the present invention is a toner cartridge that stores toner, a housing formed to be able to store the toner, a lever for operating the toner cartridge, the lever, and the housing. A substrate that is disposed between the substrate and that supports the lever; a grip plate disposed opposite the substrate; and a side edge of the substrate and a side edge of the grip plate. A cover including a side plate, and the lever includes a cylindrical portion and a lever plate extending in a predetermined direction from an outer peripheral surface of the cylindrical portion, and the substrate, the gripping plate, and the side plate are used. It surrounds at least the cylindrical part so that a person can contact the lever plate.

  According to the above configuration, since the cylindrical portion of the lever for operating the toner cartridge is surrounded by at least the substrate, the gripping plate, and the side plate so that the user can contact the lever plate, the lever is protected from external force. The user who contacts the lever is protected by the cover.

  In the above-described configuration, a stopper connected to the lever and for locking the toner cartridge is further provided, and the lever includes a first position where the toner cartridge is not locked and a second position where the toner cartridge is locked. It is preferable to be formed so as to be rotatable between them.

  According to the above configuration, the lock and unlock are performed by operating the lever between the first position and the second position.

  In the above configuration, the toner cartridge further includes a toner replenishing port and a shutter that opens and closes the toner replenishing port and is connected to the lever. The lever closes the toner replenishing port, the first position; and the toner It is preferable to be formed so as to be rotatable between the second position where the supply port is opened.

  According to the above configuration, the shutter is connected to the lever. When the lever is in the first position, the toner supply port is closed. When the lever is in the second position, the toner supply opening is opened. Therefore, the toner supply port for supplying toner can be opened and closed in accordance with the operation of the lever.

  The said structure WHEREIN: It is preferable that the said lever plate is orient | assigned to the perpendicular direction in the said 1st position.

  According to the above configuration, for example, when the side plate is provided along the lever plate in the first position, the lever plate is prevented from rotating beyond the side plate.

  The said structure WHEREIN: It is preferable that the said lever plate is orient | assigned to a horizontal direction in the said 2nd position.

  According to the above configuration, for example, when the bottom plate is provided along the lever plate in the second position, the lever plate is prevented from rotating beyond the bottom plate.

  The said structure WHEREIN: It is preferable that the said side plate follows the said lever plate in the said 1st position.

  According to the above configuration, since the side plate is along the lever plate in the first position, the lever plate is prevented from rotating beyond the first position from the second position. Therefore, the side plate can function not only as a cover for protecting the user but also as a regulating member for regulating the operation of the lever.

  The said structure WHEREIN: It is preferable that the said cover contains the baseplate in alignment with the said lever plate in the said 2nd position.

  According to the above configuration, since the bottom plate follows the lever plate in the second position, the lever plate is prevented from rotating beyond the second position from the first position. Therefore, the bottom plate can function not only as a cover for protecting the user but also as a regulating member for regulating the operation of the lever plate.

  In the above configuration, the apparatus further includes a rotation mechanism that is disposed between the substrate and the housing and connects the lever and the shutter, and the substrate partitions the rotation mechanism and the lever. Is preferred.

  According to the above configuration, the shutter is connected to the lever via the rotation mechanism. Since the board partitions the gear mechanism and the lever, the user is prevented from coming into contact with the rotating mechanism.

  The said structure WHEREIN: The said side plate is a pair of member extended between the both-sides edge of the said board | substrate, and the both-sides edge of the said holding plate, The said cover is the area | region enclosed by the said board | substrate, the said holding plate, and the above-mentioned pair of side plate It is preferable that the baseplate further includes

  According to the above configuration, since the lever is surrounded by the cover except in one direction, the user who operates the lever is preferably protected by the cover.

  The said structure WHEREIN: It is preferable that the notch part which expands the said non-covering area | region is formed in the said cover.

  According to the above configuration, the notched portion expands the uncovered region, so that the contact with the lever is facilitated, and the operability of the lever can be improved.

  An image forming apparatus according to another aspect of the present invention includes: an image forming unit that forms a toner image on a sheet; and a toner cartridge for supplying toner to the image forming unit, the toner cartridge including the toner A housing that can accommodate the toner cartridge, a lever for operating the toner cartridge, a substrate that is disposed between the lever and the housing and supports the lever, and that faces the substrate. And a cover including a side plate formed between a side edge of the substrate and a side edge of the gripping plate, and the lever includes a cylindrical portion and the cylindrical portion A lever plate extending in a predetermined direction from the outer peripheral surface of the substrate, wherein the substrate, the holding plate, and the side plate surround at least the cylindrical portion so that a user can contact the lever plate. .

  According to the above configuration, since the cylindrical portion of the lever for operating the toner cartridge is surrounded by at least the substrate, the gripping plate, and the side plate so that the user can contact the lever plate, the lever is protected from external force. The user who contacts the lever is protected by the cover. Therefore, it is possible to safely attach a toner cartridge for replenishing toner to an image forming unit that forms a toner image on a sheet.

  In the above configuration, it is preferable that the toner cartridge is slidably attached to and detached from the image forming apparatus, and the substrate and the grip plate are disposed so as to cross the sliding direction of the toner cartridge. .

  According to the above configuration, the user can first attach the housing containing the toner to the image forming apparatus and push the toner cartridge into the image forming apparatus while holding the grip plate. Therefore, it is relatively easy to attach the toner cartridge to the image forming apparatus.

  As described above, it is possible to provide a toner cartridge capable of protecting a lever for operating the toner cartridge from an external force and an image forming apparatus incorporating the toner cartridge.

1 is a perspective view of an image forming apparatus according to an embodiment of the present invention. 2 shows an internal structure of the image forming apparatus shown in FIG. 2 shows a toner cartridge attached to a relay device of the image forming apparatus shown in FIG. FIG. 4 is an exploded perspective view of the toner cartridge shown in FIG. 3. FIG. 5 is an assembled perspective view of the toner cartridge shown in FIG. 4. FIG. 5 is a cross-sectional view of the toner cartridge shown in FIG. 4. FIG. 5 is a perspective view of the toner cartridge shown in FIG. 4. FIG. 4 is a cross-sectional view of a support member of the toner cartridge and the relay device shown in FIG. 3. FIG. 4 is a cross-sectional view of a support member of the toner cartridge and the relay device shown in FIG. 3. FIG. 4 is a cross-sectional view of a support member of the toner cartridge and the relay device shown in FIG. 3. It is a perspective view which shows operation of a lever.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the terms used in the following description, such as “front”, “back”, “up”, “down”, “left” and “right”, are merely for the purpose of clarifying the description. There is no limitation to the present invention. The term “front” or a similar term means a surface on which the user operates unless otherwise specified. The terms “back”, “left”, “right”, or the like mean directions defined with respect to “front”. The “leading edge of the sheet” or a similar term means an edge located at the beginning of the sheet in the conveyance direction.

  FIG. 1 is a perspective view of an image forming apparatus according to an embodiment of the present invention. FIG. 2 schematically shows the internal structure of the image forming apparatus shown in FIG. The image forming apparatus shown in FIGS. 1 and 2 is a so-called in-body discharge type copying machine, but the present invention is not limited to this, and a printer, a facsimile machine, and a multifunction machine having these functions. Or another apparatus for forming a toner image on a sheet.

  The image forming apparatus 10 includes a substantially rectangular parallelepiped housing 11, an image forming unit 12 and a fixing unit 13 built in the housing 11, a storage unit 14 for storing sheets in the housing 11, and a housing 11. A discharge unit 15 formed in the middle stage, and an image reading unit 16 and an operation unit 17 provided on the top of the housing 11 are provided. The casing 11 is a substantially rectangular parallelepiped lower casing 111 containing the image forming unit 12, the fixing unit 13, and the storage unit 14, and a flat, substantially rectangular parallelepiped upper casing provided with the image reading unit 16 and the operation unit 17. 112, and a connection housing 113 having a substantially L shape in plan view for connecting the lower housing 111 and the upper housing 112 to each other. The connection housing 113 extends along the left edge and the back edge of the housing 11. The upper surface of the lower housing 111, the lower surface of the upper housing 112, and the right surface of the connection housing 113 form a discharge portion 15 that is recessed inward.

  The operation unit 17 constitutes a front portion of the upper housing 112. The operation unit 17 includes a numeric key 171, an LCD touch panel 172, and other operation keys. The operation unit 17 is formed so that information relating to the image forming process can be input. For example, the user can input the number of sheets to be printed through the numeric keypad 171 or can input the print density through the LCD touch panel 172.

  FIG. 2 schematically shows the internal structure of the image forming apparatus 10 shown in FIG. The image forming apparatus 10 will be further described with reference to FIG. 1 in conjunction with FIG.

  The user can cause the image forming apparatus 10 to read a desired document image through the image reading unit 16. The image reading unit 16 includes a contact glass 161 attached to the upper surface of the upper housing 112 and a pressing cover 162 that rotates on the contact glass 161. The user can turn the pressing cover 162 upward, place a desired document on the contact glass 161, rotate the pressing cover 162 downward, and press the document on the contact glass 161. A scanning mechanism 163 is disposed in the upper housing 111. When the user activates the image forming apparatus 10 through the operation unit 17, for example, the scanning mechanism 163 scans and reads an image of the document on the contact glass 161. Analog information of the image read by the scanning mechanism 163 is converted into a digital signal. The image forming apparatus 10 forms an image on the sheet P based on the digital signal.

  The sheet P is supplied from the storage unit 14. The storage unit 14 includes a paper feed cassette 142 that is detachably inserted into the lower housing 111 and a manual feed tray 141 that is rotatably attached to the right surface of the lower housing 111. The paper feed cassette 142 is a substantially rectangular parallelepiped box, and the upper portion of the paper feed cassette 142 is open. In the sheet feed cassette 142, a sheet bundle P1 formed by stacking a plurality of sheets P is stored. A pickup roller 143 is disposed above the left edge of the sheet cassette 142. In the sheet cassette 142, the left edge (leading edge) of the sheet bundle P1 is pushed up, and the left edge of the sheet bundle P1 is brought into contact with the pickup roller 143. . The pickup roller 143 sends out the sheets P one by one from the sheet bundle P1 to the conveyance path 110. A pair of conveyance rollers provided in the middle of the conveyance path 110 sends the sheet P to a secondary transfer nip formed by a second transfer roller 113 described later and an intermediate transfer belt 125 described later. In this embodiment, one paper feed cassette 142 is used. However, the present invention is not limited to this, and two or more stacked paper feed cassettes 142 are used for the storage unit 14. Also good.

  A support shaft 141 a is formed at the lower edge of the manual feed tray 141. The manual feed tray 141 is attached to the right surface of the lower housing 111 so as to be rotatable around the support shaft 141a. The manual feed tray 141 is rotatable along a right surface of the lower casing 111 between a closed position for closing the paper feed port and an open position protruding to the right. The manual feed tray 141 in the open position can support the sheet P. The sheet P on the manual feed tray 141 is sent to a secondary transfer nip formed by a later-described second transfer roller 113 built in the lower housing 111 and an later-described intermediate transfer belt 125 by a sheet feeding roller 144 and the like.

  A maintenance door 19 is attached to the front wall of the lower housing 111 so as to be rotatable up and down. The user can remove the sheet P jammed in the lower casing 111 after opening the maintenance door and being sent from the storage unit 14.

  The image forming unit 12 forms a toner image on the sheet P sent from the storage unit 14. Above the paper feed cassette 142 in the lower housing 111, a magenta unit 12M that forms a toner image with magenta toner, a cyan unit 12C that forms a toner image with cyan toner, and a yellow toner. A yellow unit 12Y for forming a toner image and a black unit 12K for forming a toner image with black toner are disposed. The magenta unit 12M, the cyan unit 12C, the yellow unit 12Y, and the black unit 12K are sequentially arranged from the right side to the left side.

  Each of the units 12M, 12C, 12Y, and 12K includes a photosensitive drum 121 and a developing device 122 that supplies toner to the photosensitive drum 121. After an electrostatic latent image is formed on the peripheral surface of the photosensitive drum 121, toner is supplied from the developing device 122, and a toner image (visible image) corresponding to the electrostatic latent image is formed.

  The photosensitive drum 121 in FIG. 2 rotates counterclockwise. The toner image formed on the photosensitive drum 121 is transferred to an intermediate transfer belt 125 that moves above the photosensitive drum 121.

  Four toner cartridges 20 that respectively store magenta toner, cyan toner, yellow toner, and black toner are detachably attached to the lower casing 111. These toner cartridges 20 are located between the intermediate transfer belt 125 and the discharge unit 15. A toner supply duct (not shown) extends from each toner cartridge 20 toward each unit 12M, 12C, 12Y, 12K, and toner is supplied to each unit 12M, 12C, 12Y, 12K.

  The image forming unit 12 further includes a charging device 123 provided below the photosensitive drum 121 of each unit 12M, 12C, 12Y, and 12K, and an exposure device 124 provided below the charging device 123. The charging device 123 uniformly charges the peripheral surface of the photosensitive drum 121. The exposure device 124 irradiates the peripheral surface of the charged photosensitive drum 121 with laser light based on a digital signal corresponding to the read original. As a result, an electrostatic latent image corresponding to each color component of the document is formed on the peripheral surface of the photosensitive drum 121 of each unit 12M, 12C, 12Y, 12K. Thereafter, the developing device 122 supplies toner to the peripheral surface of the photosensitive drum 121, and the toner electrostatically adheres to the electrostatic latent image, thereby forming a toner image.

  The intermediate transfer belt 125 above each photosensitive drum 121 extends between a left driving roller 125a and a right driven roller 125b. The lower surface of the intermediate transfer belt 125 (moving toward the left) located on the lower side is in contact with the peripheral surface of each photosensitive drum 121. The outer peripheral surface of the intermediate transfer belt 125 is used as a surface for carrying toner. A transfer roller 126 is disposed above each photosensitive drum 121. The intermediate transfer belt 125 circulates between the driving roller 125 a and the driven roller 125 b while being pressed against the peripheral surface of the photosensitive drum 121 by the transfer roller 126. A tension roller 125c is disposed between the driving roller 125a and the driven roller 125b. The tension roller 125c is biased upward by, for example, a biasing member (not shown). The tension roller 125c pushed upward by the urging member creates an outline of the mountain-shaped intermediate transfer belt 125 protruding upward near the driven roller 125b, and generates tension on the intermediate transfer belt 125.

  During the rotation of the intermediate transfer belt 125, the photosensitive drum 121 of the magenta unit 12 </ b> M transfers the magenta toner image to the intermediate transfer belt 125. Thereafter, the cyan unit 12C transfers the cyan toner image onto the magenta toner image. Thereafter, the yellow unit 12Y transfers the toner image of the yellow toner onto the toner image formed by superimposing the magenta toner and the cyan toner. Finally, the black unit 12K transfers the black toner image onto the toner image formed by superimposing the magenta toner, the cyan toner, and the yellow toner, thereby completing a full-color toner image. The full-color toner image completed on the intermediate transfer belt 125 is transferred to the sheet P conveyed from the storage unit 14.

  On the left side of the image forming unit, the conveyance path 110 extends in the vertical direction. The conveyance path 110 includes a conveyance roller pair 112. The sheet P conveyed from the storage unit 14 is conveyed by the conveyance roller pair 112 and guided by the conveyance path 110 to a secondary transfer nip formed by a second transfer roller 113 described later and an intermediate transfer belt 125 described later. Head. The conveyance path 110 includes a second transfer roller 113. The second transfer roller 113 is opposed to the drive roller 125a around which the intermediate transfer belt 125 is wound, and abuts on the outer peripheral surface of the intermediate transfer belt 125 to form a secondary transfer nip portion. The sheet P guided to the conveyance path 110 and sent to the secondary transfer nip portion between the intermediate transfer belt 125 and the second transfer roller 113 is pressed and nipped by the intermediate transfer belt 125 and the second transfer roller 113, The full color toner image completed on the transfer belt 125 is transferred onto the sheet P.

  The image forming apparatus 10 further includes a cleaning device 128. The cleaning device 128 removes the toner remaining on the intermediate transfer belt 125 after the transfer of the toner image onto the sheet P (generally referred to as secondary transfer), and cleans the intermediate transfer belt 125. The cleaning device 128 is disposed to face the driven roller 125b.

  The fixing unit 13 performs a fixing process on the toner image transferred onto the sheet P by the image forming unit. The fixing unit 13 includes a heating roller 131, a fixing roller 132 disposed to face the heating roller 131, a fixing belt 133 extending between the heating roller 131 and the fixing roller 132, and the fixing roller 132. And a pressure roller 134 disposed (in pressure contact). The heating roller 131 incorporates an energization heating element used as a heating source.

  The sheet P carrying the toner image is conveyed to the fixing unit 13. While the sheet P passes between the pressure roller 134 and the high-temperature fixing belt 133, the toner image receives heat from the fixing belt 133 and is fixed to the sheet P.

  Fixing processing by the fixing unit 13 is completed, and color printing ends. The sheet P on which color printing has been applied is guided to a conveyance path 114 extending upward from the fixing unit 13, and is discharged from the right surface of the connection housing 113 to the discharge unit 15. The upper surface of the lower housing 111 is used as a paper discharge tray 151 that supports the sheet P on which color printing has been applied.

  FIG. 3 is a perspective view showing the relay device 60 indicated by a two-dot chain line in FIG. 2. The arrangement of the relay device 60 will be described with reference to FIG. 2 in conjunction with FIG.

  The relay device 60 is disposed along the front wall of the lower casing 111 in the lower casing 111. The upper surface of the relay device 60 is formed to be able to support the front end of each toner cartridge 20. Components of the image forming apparatus (photosensitive drum 121, intermediate transfer belt 125, developing device 122, charging device 123) are disposed on the back side of the relay device 60. The relay device 60 guides the toner supplied from the toner cartridge 20 toward each developing device 122 disposed below the intermediate transfer belt 125.

  The relay device 60 further serves to store waste toner generated after the transfer process. A cleaning device 127 is disposed on the left side of each photosensitive drum 121. The cleaning device 127 removes the toner remaining on the peripheral surface of the photosensitive drum 121 after the transfer of the toner image to the intermediate transfer belt 125 (referred to as primary transfer), and the removed toner is used as waste toner. It is accommodated in the relay device 60. The peripheral surface of the photosensitive drum 121 cleaned by the cleaning device 127 is directed to the charging device 123 and newly charged. A cleaning device 128 is disposed on the right side of the intermediate transfer belt 125 so as to face the driven roller 125b. The cleaning device 128 removes the toner remaining on the outer peripheral surface of the intermediate transfer belt 125 that has finished transferring the toner image to the sheet P (referred to as secondary transfer), and the removed toner is relayed as waste toner. Housed in device 60. Thereafter, the outer peripheral surface of the intermediate transfer belt 125 cleaned by the cleaning device 128 receives a new toner image transferred from each photosensitive drum 121.

  4 is a perspective view of the toner cartridge 20 shown in FIG. 3, and FIG. 5 is an assembly view of the toner cartridge 20 shown in FIG. The toner cartridge will be described with reference to FIGS. 1 and 3 in conjunction with FIGS.

  The toner cartridge 20 includes a housing 30 that is formed so as to be able to store toner and that opens upward, a lid 40 that closes the opening of the housing 30, and an attachment 50 that is attached to the front end of the housing 30. . The casing 30 and the lid 40 extend from the front end supported by the relay device 60 toward the back surface of the image forming apparatus 10 (with the toner cartridge 20 mounted on the relay device 60). The toner cartridge 20 is slidably inserted and pulled out from the front surface of the lower housing 111.

  The housing 30 includes a front plate 31 that extends in a direction orthogonal to the direction in which the toner cartridge 20 is slid, a rear plate 32 that is disposed to face the front plate 31, and a lower edge and a rear edge of the front plate 31. A bottom plate 33 extending between the lower edge of the plate 32, a left plate 34 extending upward from the left edge of the bottom plate 33, and a right plate 35 extending upward from the right edge of the bottom plate 33 are included.

  The bottom plate 33 includes a right bottom plate 33a and a left bottom plate 33b. The right bottom plate 33a and the left bottom plate 33b have an arc cross section. The radius of the arc cross section of the right bottom plate 33a is larger than the radius of the arc cross section of the left bottom plate 33b. A partition plate 331 extending along the boundary between the right bottom plate 33 a and the left bottom plate 33 b is disposed in the housing 30, and the partition plate 331 partially divides the internal space of the housing 30 left and right.

  The front plate 31 is formed with a filling port. Toner is introduced into the housing 30 through the filling port. After the toner is filled in the housing 30, the filling port is closed by the cap 313.

  The lid 40 includes a flat top plate 41, a front plate 42 inclined downward from the front edge of the top plate 41 toward the front, a left plate 43 extending downward from the left edge of the top plate 41, and the top plate 41. A right plate 44 extending downward from the right edge of the top plate 41 and a rear plate 45 extending downward from the rear edge of the top plate 41. The top plate 41, the front plate 42, the left plate 43, the right plate 44 and the rear plate 45 are integrally formed of resin.

  A concave portion 411 having a substantially C shape in plan view is formed on the upper surface of the lid 40. A handle 412 having a shape complementary to the recess 411 is disposed in the recess 411. The handle 412 is attached to the lid 40 so as to be rotatable up and down. An upper flange 46 extending outward from the entire lower edge of the lid 40 is formed. A lower flange 39 extending outward from the entire upper edge of the housing 30 is formed. The upper flange 46 and the lower flange 39 have substantially the same shape and are overlapped with each other. After the upper flange 46 is laminated on the lower flange 39, a welding process (for example, using high frequency) is performed between them, and the housing 30 is closed by the lid body 40.

  An agitator 36 is disposed in the housing 30. The agitator 36 is formed so that the toner in the housing 30 can be stirred. The agitator 36 includes a stirring shaft 361 extending from the rear plate 32 toward the front plate 31, and a plurality of stirring fins 362 made of a film extending in the radial direction of the stirring shaft 361 from the peripheral surface of the stirring shaft 361. The agitator 36 shown in FIG. 4 includes four stirring fins 362 arranged at a pitch of 90 °, but the present invention is not limited to this, and a single stirring fin 362, two stirring fins 362, 3 One stirring fin 362 or five or more stirring fins may be included.

  The stirring shaft 361 extends along the center of curvature of the right bottom plate 33a. The distance from the rotation center of the stirring shaft 361 to the tip edge of the stirring fin 362 is longer than the radius of curvature of the right bottom plate 33a. When the agitation shaft 361 rotates, the leading edge of the agitation fin 362 slides on the upper surface of the right bottom plate 33a, and the entire toner is agitated.

  A screw feeder 37 extending from the rear plate 32 toward the front plate 31 and a cylindrical shutter 38 surrounding the front end of the screw feeder are disposed inside the housing 30.

  FIG. 4 further shows a cylindrical shutter 38 partially cut away. 6 is a cross-sectional view taken along line VV in FIG. The toner cartridge 20 will be further described with reference to FIG. 5 in conjunction with FIG. 4 and FIG.

  The screw feeder 37 is provided on the left bottom plate 33b, and includes a feeder shaft 371 extending from the rear plate 32 toward the front plate 31 and a spiral fin 372 concentrically surrounding the feeder shaft 371. The rotation axis of the feeder shaft 371 coincides with the center of curvature of the left bottom plate 33b. The outer radius of the spiral fin 372 is slightly smaller than the curvature radius of the left bottom plate 33b. A toner supply port 332 is formed in the vicinity of the front end of the left bottom plate 33b. The spiral fin 372 rotates with the feeder shaft 371 and is formed so as to convey the toner to the toner supply port 332.

  A gear mechanism (not shown) that connects the agitation shaft 361 and the feeder shaft 371 is formed on the outer surface of the rear plate 32. The gear mechanism rotates the stirring shaft 361 and the feeder shaft 371 in conjunction with each other. A drive motor (not shown) is connected to the gear mechanism. Due to the transmission of the driving force of the driving motor, the stirring shaft 361 and the feeder shaft 371 simultaneously rotate around their respective axes.

  The cylindrical shutter 38 includes a cylinder 381 and a shaft 382 that protrudes forward from the front end surface of the cylinder 381. The outer radius of the cylinder 381 is slightly smaller than the radius of curvature of the left bottom plate 33 b and slightly larger than the outer radius of the spiral fin 372. The shaft 382 is concentric with the cylinder 381. An opening 381 a is formed in the peripheral wall of the cylinder 381. The opening 381a is formed to be able to communicate with the toner supply port 332.

  When the screw feeder 37 rotates, toner enters the cylindrical shutter 38 from the opening at the rear end of the cylindrical shutter 38. The front wall 381 b that closes the front portion of the cylinder 381 prevents the toner from moving forward beyond the cylindrical shutter 38. A shaft 382 protrudes forward from the center of the front wall 381b. A keyway 382 a is formed at the tip of the shaft 382. The shaft 382 meshes with the second sect gear 533 via the key groove 382a. A support hole 382 b is formed on the inner surface of the front wall 381 b of the cylinder 381. The front end of the feeder shaft 371 is inserted into the support hole 382b and supported rotatably. Accordingly, the rotation of the feeder shaft 371 is not transmitted to the cylindrical shutter 38. The cylindrical shutter 38 rotates in conjunction with the second sect gear 533.

  An annular positioning portion 314 protruding forward is formed on the outer surface of the front plate 31. The positioning part 314 is formed coaxially with the feeder shaft 371. A through hole 314 a is formed along the axis of the positioning portion 314. A key projection 533d of a second sect gear 533, which will be described later, is inserted into the through hole 314a and supported rotatably.

  FIG. 7 is a perspective view of the attachment 50. FIG. 7A is a developed perspective view of the attachment 50. FIG. 7B is an assembly diagram showing the external structure of the attachment 50. FIG. 7C is an assembly view showing the internal structure of the attachment 50. The attachment 50 will be described with reference to FIGS. 4 and 6 in conjunction with FIG.

  The attachment 50 is attached to the front end of the housing 30. The attachment 50 is used for attaching the toner cartridge 20 to the casing 11 of the image forming apparatus 10 and for opening and closing the cylindrical shutter 38.

  The attachment 50 includes a cover 51 that covers the front end of the housing 30. The cover 51 is used as a handle when the toner cartridge 20 is attached to the casing 11 of the image forming apparatus 10 and pulled out from the casing 11. The attachment 50 further includes a lever 52 that is used for opening and closing the cylindrical shutter 38 and an operation for fixing the toner cartridge 20 to the relay device 60, and a rotation mechanism 53 that transmits the rotation of the lever 52 to the shutter member 38. Including.

  The cover 51 that partially surrounds the lever 52 is disposed between the lever 52 and the housing 30 and supports the lever 52 so as to be rotatable, and is disposed in front of the substrate 514 and is disposed on the substrate 514. And a bottom plate 511 extending between the lower edge of the substrate 514 and the lower edge of the gripping plate 512. The cover 51 further includes a pair of side plates 513 that extend between the left and right edges of the substrate 514 and the left and right edges of the gripping plate 512. The area surrounded by the upper edge of the substrate 514, the upper edge of the grip plate 512, and the upper edge of the side plate 513 is an uncovered area that does not cover the lever 52, and the user can contact the lever 52 through the uncovered area. . A user can insert a finger into a holding space V0 formed between the substrate 514, the bottom plate 511, the holding plate 512, and the side plate 513 to hold the toner cartridge 20 or operate the lever 52. The substrate 514, the bottom plate 511, the gripping plate 512, and the side plate 513 prevent the user's finger inserted into the gripping space V 0 from coming into contact with other devices disposed around the toner cartridge 20. It plays a role to protect the fingers. The bottom plate 511 closes a region surrounded by the lower edge of the substrate 514, the lower edge of the holding plate 512, and the lower edge of the side plate 513. Therefore, since the lever 52 is surrounded except for one direction, the lever 52 is suitably protected from external force.

  The cover 51 further includes a pair of clamping plates 510 extending rearward from the left and right edges of the substrate 514. The sandwiching plate 510 is used for attaching the attachment 50 to the housing 30. The sandwiching plate 510 sandwiches the front end of the housing 30. Thereby, the cover 51 is attached to the housing 30. Each clamping plate 510 includes a square hole 510a. A protrusion 351 protruding outward is formed at the front end of the left plate 34 and the front end of the right plate 35 of the housing 30. When the attachment 50 is attached to the housing 30, the pair of clamping plates 510 are elastically deformed outward by the protrusions 351, and then the protrusions 351 are fitted into the square holes 510 a, so that the attachment 50 is attached to the housing 30. Attached to the front end.

  A trapezoidal notch 512 a is formed on the upper edge of the gripping plate 512. The notch 512a occupies a substantially right half section of the upper edge of the gripping plate 512, and widens an uncovered region surrounded by the upper edge of the substrate 514, the upper edge of the gripping plate 512, and the upper edge of the side plate 513. The user can operate the lever 52 by inserting a finger of the right hand into the grasping space V0 through the notch 512a. Therefore, the notch 512a can improve the operability of the lever 52. For left-handed users, the notch 512a may be formed so as to occupy a substantially left half section of the upper edge of the gripping plate 512.

  An attachment hole 514a is formed in the center of the substrate 514. The rotation shaft 531 is inserted into the attachment hole 514a. A lever 52 is attached to the front end of the rotating shaft 531. A columnar protrusion 514 b that protrudes rearward is formed on the left side region of the inner surface of the substrate 514. A second sect gear 533 is attached to the protrusion 514b.

  The lever 52 attached to the substrate 514 via the rotating shaft 531 is disposed in the gripping space V0. The lever 52 includes a cylindrical portion 521 and a lever plate 522 extending in a tangential direction from the outer peripheral surface of the cylindrical portion 521. In the illustrated example, the lever plate 522 extends upward from the left end of the cylindrical portion 521 so that the lever 52 can be easily rotated clockwise, but the lever 52 is operated counterclockwise. In this case, the cylindrical portion 521 may extend upward from the right end. A D-cut portion 531 b is provided at the front end of the rotating shaft 531. A D hole 521 a having a shape complementary to the front end of the rotating shaft 531 is formed on the back surface of the cylindrical portion 521. The D hole 521a is formed concentrically with the cylindrical portion 521. The cylindrical portion 521 includes a through hole 521b having a diameter smaller than that of the D hole 521a. The through hole 521b is formed concentrically with the cylindrical portion 521. A screw hole 531 a is formed in the front end surface of the rotating shaft 531. By inserting the D cut portion 531b of the rotating shaft 531 into the D hole 521a of the cylindrical portion 521 and screwing the screw S through the through hole 521b into the screw hole 531a of the rotating shaft 531 inserted into the D hole 521a. The lever 52 can be connected to the rotating shaft 531.

  The lever 52 is rotatable between a first position where the lever plate 522 is vertically oriented and a second position where the lever plate 522 is lying horizontally. The bottom plate 511 is along the lever plate 522 in the second position and prevents the lever plate 522 from rotating beyond the bottom plate 511. The left side plate 513 is along the lever plate 522 in the first position and prevents the lever plate 522 from rotating beyond the side plate 513. While the lever 52 is in the second position, the opening 381a of the cylindrical shutter 38 communicates with the toner supply port 332 and the toner cartridge 20 is locked to the housing 11 of the image forming apparatus 10. On the other hand, when the lever 52 is in the first position, the opening 381a of the cylindrical shutter 38 does not communicate with the toner supply port 332, and the lock between the toner cartridge 20 and the casing 11 of the image forming apparatus 10 is present. Will be released.

  The rotation mechanism 53 formed between the substrate 514 and the housing 30 includes a rotation shaft 531 including a front end portion that is fitted to the cylindrical portion 521 of the lever 52 and a rear end portion of the rotation shaft 531 that is externally fitted. It includes a first sect gear 532 and a second sect gear 533 that meshes with the first sect gear 532. The rotating shaft 531 is rotatably fitted in the mounting hole 514a of the substrate 514. The second sect gear 533 is rotatably attached to the protrusion 514b of the substrate 514. The substrate 514 partitions the lever 52 and the rotation mechanism 53.

  The rotating shaft 531 is formed slightly longer than the thickness of the substrate 514, and the front end and the rear end of the rotating shaft 531 slightly protrude from the outer surface and the inner surface of the substrate 514, respectively.

  As described above, the screw S connects the cylindrical portion 521 of the lever 52 and the rotary shaft 531. Therefore, when the lever 52 is rotated, the rotary shaft 531 rotates integrally with the lever 52. A key piece 531c protrudes outward from the peripheral surface of the rear end of the rotary shaft 531. When the rotation shaft 531 is inserted into the mounting hole 514a of the substrate 514, the key piece 531c is caught on the inner surface of the substrate 514, stops the forward movement of the rotation shaft 531, and positions the rotation shaft 531 with respect to the substrate 541.

  Gear teeth 532 a are formed over the semicircular circumference of the outer peripheral surface of the substantially annular first sect gear 532. A prismatic stopper 532 b is formed on the other semicircular circumference of the outer peripheral surface of the first sect gear 532. While the lever 52 is in the first position, the gear teeth 532 a are located on the left side of the outer peripheral surface of the first sect gear 532, and the stopper 532 b projects rightward from the outer peripheral surface of the first sect gear 532. The diameter of the center hole 532 c formed at the center of the first sect gear 532 is slightly larger than the outer diameter of the rotary shaft 531. A key groove 532 d extending in the radial direction is formed on the inner peripheral surface of the first sect gear 532. The key groove 532d is complementary to the key piece 531c of the rotary shaft 531. The rotary shaft 531 is inserted into the center hole 532c of the first sect gear 532 so that the key groove 532d and the key piece 531c are engaged with each other. The first sect gear 532 can rotate integrally and concentrically with the rotating shaft 531.

  Gear teeth 533 a are formed on the half peripheral surface of the outer peripheral surface of the second sect gear 533. While the lever 52 is in the first position, the gear teeth 533 a are located on the right side of the outer peripheral surface of the second sect gear 533 and mesh with the gear teeth 532 a of the first sect gear 532. On the front end surface of the second sect gear 533, a recess 533b complementary to the protrusion 514b of the substrate 514 is formed. The protrusion 514b is inserted into the recess 533b of the second sect gear 533, and the second sect gear 533 is rotatably supported.

  The connecting cylinder 533c protrudes rearward from the rear end surface of the second sect gear 533. The inner diameter of the connecting cylinder 533c is slightly larger than the outer diameter of the positioning portion 314 of the front plate 31. When the cover 51 is attached to the front end of the housing 30, the positioning portion 314 is inserted into the connecting cylinder 533c, and the second sect gear 533 is positioned.

  A key protrusion 533d protrudes rearward from the rear end surface of the second sect gear 533. The key protrusion 533d meshes with a key groove 382a formed at the tip of the shaft 382 of the cylindrical shutter 38 inserted into the connecting cylinder 533c. Thereby, the rotation of the second sect gear 533 is transmitted to the cylinder 381 of the cylindrical shutter 38 through the meshing between the key protrusion 533d and the key groove 382a. As a result, the cylinder 381 can rotate between an open position where the opening 381a and the toner supply port 332 communicate with each other and a closed position where the opening 381a and the toner supply port 332 do not communicate.

  With reference to FIG. 3 again, the structure of the relay device 60 will be described.

  The relay device 60 includes a substantially rectangular parallelepiped housing 61 and a support member 62 disposed on the upper surface of the housing 61. The support member 62 is formed to support the front end of each toner cartridge 20.

  The relay device 60 includes a plurality of relay ducts (not shown) that relay toner from each toner cartridge 20 to each developing device 122, each cleaning device 127 that cleans each photosensitive drum 121, and the intermediate transfer belt 125. A collection duct (not shown) for guiding the waste toner removed by the cleaning device 128 to be cleaned and a collection container (not shown) for storing the waste toner conveyed through the collection duct are incorporated.

  The support member 62 includes a support plate 621 having a width substantially equal to the width dimension of each toner cartridge 20, and partition walls 622 erected upward from the left and right edges of the support plate 621 (in FIG. 3, five partition walls 622 are shown. And a shutter mechanism 623 disposed on the upper surface of each support plate 621. A support space V1 is formed between a pair of adjacent partition walls 622, and the front end of the toner cartridge 20 is inserted into the support space V1.

  The toner cartridge 20 is slid into the support space V1 horizontally and rearwardly. During this time, a shutter plate (not shown) of the shutter mechanism 623 is opened by the toner cartridge 20. When the toner cartridge 20 is pulled forward, the shutter plate is returned to the closed position by an urging member (not shown) connected to the shutter plate. Since the substrate 514 and the gripping plate 512 extend in a direction perpendicular to the sliding direction of the toner cartridge 20, the user can easily slide the toner cartridge 20 by gripping the gripping plate 512.

  FIG. 8 is a cross-sectional view of the toner cartridge 20 including the support member 62 and the lever 52 in the second position. The attachment of the toner cartridge 20 to the support member 62 will be described with reference to FIGS. 3 and 7C in conjunction with FIG.

  The support plate 621 includes a lock hole 621a. When the lever 52 is rotated 90 ° clockwise from the first position shown in FIG. 7C (when the lever 52 is rotated to the second position), the lever 52 protrudes in the horizontal direction when the lever 52 is in the first position. The stopper 532b protrudes downward. The tip of the stopper 532b protruding downward enters the lock hole 621a. As a result, the toner cartridge 20 is locked with respect to the support plate 621 and cannot be pulled out from the housing 11 of the image forming apparatus 10. Thereafter, when the lever 52 is moved to the first position so that the lever plate 522 is directed vertically, the stopper 532b is returned to the position shown in FIG. 7C, and the lock of the toner cartridge 20 is released. At this time, the stopper 532b does not engage with the lock hole 621a, and the toner cartridge 20 can be pulled forward from the support space V1.

  FIG. 9 is a cross-sectional view of the toner cartridge 20 and the support member 62. 9A is a cross-sectional view of the toner cartridge 20 including the lever 52 in the first position and the support member 62, and FIG. 9B is a cylindrical shutter 38 when the lever 52 is in the first position. 6 is a cross-sectional view of the toner cartridge 20 and the support member 62 showing the position of the opening 381a formed in the cylinder 381. FIG. FIG. 10 is a cross-sectional view of the toner cartridge 20 and the support member 62. 10A is a cross-sectional view of the toner cartridge 20 including the lever 52 in the second position and the support member 62. FIG. 10B is a cylindrical shutter 38 when the lever 52 is in the second position. 6 is a cross-sectional view of the toner cartridge 20 and the support member 62 showing the position of the opening 381a formed in the cylinder 381. FIG.

  When the lever 52 is in the first position, the lever plate 522 faces in the vertical direction. At this time, the stopper 532 b of the first sect gear 532 is disengaged from the lock hole 621 a of the support plate 621 and extends rightward from the peripheral surface of the first sect gear 532. At this time, the opening 381 a formed in the cylinder 381 of the cylindrical shutter 38 faces leftward and does not communicate with the toner supply port 332. Therefore, the toner in the toner cartridge 20 does not leak out of the toner cartridge 20.

  When the lever 52 is in the second position, the lever plate 522 is lying horizontally. At this time, the stopper 532b of the first sect gear 532 extends downward from the peripheral surface of the first sect gear 532 so as to fit into the lock hole 621a of the support plate 621. When the lever 52 is rotated so that the lever plate 522 lies horizontally, the second sect gear 533 that meshes with the first sect gear 532 rotates 90 ° around the shaft 382 of the cylindrical shutter 38 counterclockwise. As a result, the opening 381a formed in the cylinder 381 of the cylindrical shutter 38 that rotates integrally with the second sect gear 533 faces downward and communicates with the toner supply port 332. Further, the screw feeder 37 conveys toner toward the toner supply port 332. Therefore, the toner in the toner cartridge 20 is supplied to the developing device 122 through the opening 381 a of the cylindrical shutter 38 and the toner supply port 332 of the housing 30 as the screw feeder 37 rotates. At this time, since the stopper 532 b is fitted into the lock hole 621 a of the support plate 621, the toner cartridge 20 cannot be pulled out from the housing 11 of the image forming apparatus 10.

  FIG. 11 shows the operation of the lever 52.

  As described above, when the cover 50 is attached to the front end of the housing 30, the bottom plate 511 of the cover, the grip plate 512 extending upward from the front edge of the bottom plate 511, the pair of side plates 513 extending upward from the left and right edges of the bottom plate 511, A gripping space V0 is formed between the substrate 514 extending so as to face the gripping plate 512. The user can insert a hand or a finger into the grasping space V0, touch the lever 52, and operate the lever 52. The bottom plate 511, the holding plate 512, the pair of side plates 513, and the substrate 514 serve to protect the user's hand and / or finger, and the user's hand and / or finger are in contact with devices around the toner cartridge 20. To prevent. A cutout portion 512 a is formed on the substantially right half of the upper edge of the gripping plate 512. The notch 512 a that is recessed downward facilitates contact of the right hand of the user with the lever 52. As a result, the operability of the lever 52 is improved.

  In the present embodiment, a copying machine is shown as the image forming apparatus 10 in which the toner cartridge 20 is incorporated. However, the present invention is not limited to this, and a printer, a facsimile machine, or any other device capable of forming an image on a sheet. The apparatus may be used as an image forming apparatus.

  The above-described image forming apparatus 10 uses the photosensitive drum 121 and the intermediate transfer belt 125 as the image carrier, but does not include the intermediate transfer belt but includes a structure that directly transfers an image from the photosensitive drum 121 to the sheet. An image forming apparatus may be used.

  The image forming apparatus 10 described above has the ability to perform color printing, but the present invention is not limited to this, and an image forming apparatus that performs only monochrome printing may be used.

  Although the above-described relay device 60 is used as a support portion that supports the toner cartridge 20, the present invention is not limited to this, and the toner cartridge 20 is attached by an arbitrary frame formed in the housing 11. It may be supported.

  In the toner cartridge 20, the bottom plate 511, the substrate 514, the holding plate 512, and the pair of side plates 513 form the holding space V0. However, the present invention is not limited to this, and some of these plates are held. The space V0 may be formed. For example, the pair of side plates 513 may be omitted.

  The lever 52 of the toner cartridge 20 is formed to lie on the right side, but may be formed to lie on the left side. In this case, the notch 512a is preferably formed by the substantially left half of the upper edge of the gripping plate 512.

  The lever 52 of the toner cartridge 20 is used to operate the cylinder 381 of the cylindrical shutter 38 and the stopper 532b of the first sect gear 532, but the present invention is not limited to this, and the lever 52 The cylinder 381 and the stopper 532b may be used to operate any one of them.

  The present invention can be suitably applied to various image forming apparatuses such as a color printer, a printer, a copier, a facsimile machine, and a multifunction machine having these functions.

DESCRIPTION OF SYMBOLS 10 ... Image forming apparatus 12 ... Image forming part 20 ... Toner cartridge 332 ... Toner supply port 38 ... Cylindrical shutter (shutter)
51... Cover 511... Bottom plate 512 .. Grasping plate 512 a .. Notch 513... Side plate 514.

Claims (12)

A toner cartridge containing toner,
A housing formed to accommodate the toner;
A lever for operating the toner cartridge;
A substrate disposed between the lever and the housing and supporting the lever; a gripping plate disposed opposite the substrate; a side edge of the substrate and a side edge of the gripping plate; And a cover including a side plate formed between,
The lever has a cylindrical portion and a lever plate extending in a predetermined direction from the outer peripheral surface of the cylindrical portion,
The toner cartridge, wherein the substrate, the holding plate, and the side plate surround at least the cylindrical portion so that a user can contact the lever plate. A stopper connected to the lever and for locking the toner cartridge;
The toner cartridge according to claim 1, wherein the lever is formed to be rotatable between a first position where the toner cartridge is not locked and a second position where the toner cartridge is locked. The toner cartridge further includes a toner supply port, and a shutter that opens and closes the toner supply port and is connected to the lever.
3. The toner cartridge according to claim 1, wherein the lever is formed to be rotatable between a first position for closing the toner supply port and a second position for opening the toner supply port.   The toner cartridge according to claim 2, wherein the lever plate is oriented in a vertical direction at the first position.   The toner cartridge according to claim 2, wherein the lever plate is oriented in the horizontal direction at the second position.   The toner cartridge according to claim 4, wherein the side plate is along the lever plate at the first position.   The toner cartridge according to claim 5, wherein the cover includes a bottom plate along the lever plate in the second position. A rotation mechanism that is disposed between the substrate and the housing and connects the lever and the shutter;
The toner cartridge according to claim 3, wherein the substrate partitions the rotation mechanism and the lever. The side plates are a pair of members extending between both side edges of the substrate and both side edges of the gripping plate;
The toner cartridge according to claim 1, wherein the cover further includes a bottom plate that closes a region surrounded by the substrate, the gripping plate, and the pair of side plates. 10. The toner cartridge according to claim 1, wherein the cover is formed with a notch that expands an uncovered region that does not cover the lever . 11. An image forming unit for forming a toner image on a sheet;
A toner cartridge for supplying toner to the image forming unit,
The toner cartridge includes a housing formed to be able to store the toner, a lever for operating the toner cartridge, and a substrate disposed between the lever and the housing and supporting the lever. And a cover including a gripping plate disposed to face the substrate, and a side plate formed between a side edge of the substrate and a side edge of the gripping plate,
The lever has a cylindrical portion and a lever plate extending in a predetermined direction from the outer peripheral surface of the cylindrical portion,
The image forming apparatus, wherein the substrate, the gripping plate, and the side plate surround at least the cylindrical portion so that a user can contact the lever plate. The toner cartridge is slidably attached to the image forming apparatus,
The image forming apparatus according to claim 11, wherein the substrate and the grip plate are disposed so as to cross a sliding direction of the toner cartridge when attached and detached.