JP2016051042A - Toner supply device and image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably supply toner.SOLUTION: A toner cartridge case 63 has a conveyance coil 70 for conveying toner therein, and the conveyance coil 70 has a driving shaft 71 for driving to rotate the coil connected thereto. The driving shaft 71 is connected to a coupling 66 to which a rotational driving force is transmitted from an image forming apparatus 10 side and has a sealing material (packing) 72 provided between the coupling and the driving shaft. The conveyance coil 70 has a coil spring 73, which rotates in the vicinity of a toner supply port 67 following the rotation of the conveyance coil 70, attached to a part thereof in a swingable manner. The coil spring 73 rotates in the vicinity of the toner supply port 67 in conjunction with the rotation of the conveyance coil 70 to break down a toner pressed and conveyed in the direction of the toner supply port 67.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a toner replenishing device and an image forming apparatus.

  Conventionally, there is an electrophotographic image forming apparatus. This image forming apparatus generally initializes a photosensitive drum of a developing device by uniformly charging it, forms a latent image by optical writing on the photosensitive drum, converts the latent image into a toner image (development), The toner image is directly or indirectly transferred to a printing medium and fixed by a fixing device.

  A developing device is used for toner image formation. Generally, toner is filled in a toner cartridge and is conveyed to a developing device by a predetermined amount. In order to prevent the toner from aggregating inside the cartridge, there is a toner breaking technique using Mylar (a hitting member made of thin plate resin elasticity).

  6A and 6B are a perspective view and a sectional view showing the structure of a toner cartridge according to the prior art. In the prior art, a mylar 3 is attached near the toner replenishing port 2 of the toner cartridge 1 and abutted against a part of the rotating transporting coil 4 or drive shaft 5 to cause the mylar 3 to bounce and agglomerate due to the impact / vibration. Break down the toner.

  However, since the above-described conventional toner cartridge uses Mylar's resin elasticity, there is a problem in that it tends to sag and deform and lacks durability. In addition, as a method of attaching the mylar, a double-sided tape is generally used, but there is a problem that there is a fear of peeling off. Further, since the mylar itself is fixed in the vicinity of the toner supply port, the range in which the toner is destroyed is limited. Moreover, since the place where the mylar is attached is a deep place in the case, it is difficult to put in a hand and sticking is difficult. Furthermore, there is a problem if a sound is generated each time the mylar is bounced by a transfer coil or a drive shaft.

Therefore, another technique for preventing toner aggregation has been proposed.
For example, in Patent Document 1, a spiral member such as a coil spring having an elastic force is provided in a toner supply path, and the collapsing member is expanded and contracted as the agitator rotates, so that the toner is removed. Techniques for preventing aggregation are proposed.

JP 2010-78797 A

  However, in the above-described Patent Document 1, since the breaking member is fixed to the wall forming the toner supply path, there is a problem in that the toner cannot be sufficiently stirred and breakage is likely to occur.

  Accordingly, an object of the present invention is to perform stable toner replenishment.

  A toner replenishing device according to the present invention is a toner replenishing device that is detachably provided in an image forming apparatus and contains toner to be supplied to a developing device disposed in the image forming apparatus, A toner cartridge main body provided with a discharge port for supplying toner to the developing unit; and the image forming apparatus disposed inside the toner cartridge main body when the toner cartridge main body is mounted on the image forming apparatus. A transfer coil that engages with a drive system provided in the toner cartridge and rotates inside the toner cartridge main body by a rotational driving force transmitted from the drive system, and is freely disposed in the transfer coil, and the transfer coil And a toner breaker spring that rotates so as to slide in the vicinity of the discharge port inside the toner cartridge body as the toner rotates. That.

  An image forming apparatus according to the present invention is an image forming apparatus that includes a toner cartridge that is detachably provided and contains toner to be supplied to a developing device, the toner cartridge including the toner on one end side. A toner cartridge main body provided with a discharge port for supplying to the developing device, and disposed inside the toner cartridge main body, and provided in the image forming apparatus when the toner cartridge main body is attached to the image forming apparatus. A transfer coil that engages with the drive system and is rotated inside the toner cartridge body by a rotational driving force transmitted from the drive system, and is swingably disposed on the transfer coil so that the transfer coil rotates. Accordingly, a toner breaker spring that rotates so as to slide in the vicinity of the discharge port inside the toner cartridge body is provided. The features.

  According to the present invention, stable toner supply can be performed.

1 is an overall conceptual diagram of an image forming apparatus 10 for printing continuous paper, for example, roll paper or flat paper (hereinafter referred to as flat paper) according to an embodiment of the present invention. FIG. 3 is a perspective view illustrating an appearance of a toner cartridge 33 of the image forming apparatus 10 according to the present embodiment. FIG. 3 is a perspective view showing an internal structure of a toner cartridge 33 of the image forming apparatus 10 according to the present embodiment. FIG. 4 is an enlarged view showing a partial internal structure of the toner cartridge 33 shown in FIG. 3. FIG. 6 is a cross-sectional view for explaining a toner stirring effect in the toner cartridge 33 of the image forming apparatus 10 according to the present embodiment. FIG. 6 is a perspective view and a cross-sectional view illustrating a structure of a toner cartridge according to a conventional technique.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

A. Configuration of Embodiment FIG. 1 is an overall conceptual diagram of an image forming apparatus 10 for printing roll-shaped paper (hereinafter referred to as roll paper) or flat paper according to an embodiment of the present invention. In FIG. 1, the image forming apparatus 10 includes a roll paper supply unit 20, a printer main body 30, and a roll paper winding unit 50. The roll paper supply unit 20 is installed in the lower part of the printer main body 30, and a paper feed roll 21 is installed. The print medium 21a, which is roll paper pulled out from the paper supply roll 21, is supplied from here to the printer main body 30 positioned at the top.

  The paper feed roller 22 fixes the end position of the print medium 21 a before the print medium 21 a enters the printer main body 30. The paper leading edge detection unit 23 detects the leading edge of the printing medium 21 a supplied to the printer main body 30. The paper edge detection unit 24 detects the edge of the printing medium 21 a supplied to the printer main body 30 (the edge in the lateral direction with respect to the paper conveyance direction).

  The printer main body 30 is an electrophotographic secondary transfer tandem color image forming apparatus, and includes a drum / developing device 31, a transfer belt device 32, a toner cartridge 33, an electrical unit 34, a paper feeding unit 35, and a fixing unit. It consists of the device 36 and the like.

  A toner cartridge 33 is disposed above the transfer belt device 32, and a drum / developing device 31 is disposed substantially immediately below the transfer belt device 32. The transfer belt device 32 includes an intermediate transfer belt 37, a driving roller 38, and a driven roller 39. The drum / developing device 31 is configured by contacting four lower developing devices 31k, 31c, 31m, and 31y in a multi-stage manner in contact with the lower running surface of the intermediate transfer belt 37 of the transfer belt device 32 from the right to the left in FIG. Is done.

  The developing devices 31k, 31c, 31m, and 31y include four toner cartridges 33, and black (K), cyan (C), magenta (M), and yellow (Y) indicated by K, C, M, and Y in FIG. ) Toner is supplied.

  The toner cartridge 33 is composed of four toner cartridges arranged above the upper running surface of the intermediate transfer belt 37. Each of the four toner cartridges contains black (K), cyan (C), magenta (M), and yellow (Y) supply toner. A toner vertical conveyance path 40 is disposed between the toner cartridge 33 and the drum / developing device 31, and a predetermined amount of toner is conveyed from the toner cartridge 33 into the drum / developing device 31.

  The developing device 31 includes four developing devices 31k, 31c, 31m, and 31y arranged in a multistage manner. Each of the developing devices 31k, 31c, 31m, and 31y has the same configuration except for the color of the toner that develops the image. Of the developing devices 31k, 31c, 31m, and 31y, the three developing devices 31c, 31m, and 31y on the downstream side (the left side in the figure) are cyan (C), magenta (M), and yellow (subtractive three primary colors, respectively). A mono-color image of the color toner of Y) is formed on the intermediate transfer belt 37, and the developing device 31k is formed on the intermediate transfer belt 37 mainly used for dark portions of characters and images.

  The transfer belt device 32 has an endless intermediate transfer belt 37 that extends in the shape of a flat loop in the left-right direction in the figure at the approximate center of the printer main body 30, and the intermediate transfer belt 37 is stretched over the intermediate transfer belt 37. A driving roller 38 and a driven roller 39 are provided to circulate and move the transfer belt 37 counterclockwise in the drawing.

  The transfer belt device 32 further includes a secondary transfer backup roller 41 over which an intermediate transfer belt 37 is stretched above the drive roller 38. A secondary transfer roller 42 is pressed against the secondary transfer backup roller 41 via an intermediate transfer belt 37.

  The print medium 21 a conveyed through the printer main body 30 is pressed against the intermediate transfer belt 37 when being conveyed between the secondary transfer backup roller 41 and the secondary transfer roller 42. As a result, a mono-color image and black (K) toner formed on the intermediate transfer belt 37 using cyan (C), magenta (M), and yellow (Y) color toners are formed on the roll paper that is the printing medium 21a. The monochrome images are sequentially transferred and supplied to the fixing device 36.

  The paper feed unit 35 includes a paper feed cassette on which flat paper is placed. In the following, roll paper and flat paper will be described as the print medium 21a. The flat paper in the paper feed cassette is conveyed to the upper secondary transfer backup roller 41 and the secondary transfer roller 42 via the feed roller 44 in the same manner as the roll paper. Thereafter, the monochromatic image and the black (K) toner formed on the intermediate transfer belt 37 using the cyan (C), magenta (M), and yellow (Y) color toners are formed on the flat sheet as the printing medium 21a. The monochrome images are sequentially transferred and supplied to the fixing device 36.

  The fixing device 36 is a belt-type heat fixing device, and fixes the toner image transferred to the printing medium 21a made of roll paper or flat paper. The roll paper carried out from the fixing device 36 is taken up by a take-up roll 51 installed in the roll paper take-up unit 50 via the face-up unit 45. On the other hand, the flat paper carried out of the fixing device 36 is discharged to a paper discharge tray 46 placed on the upper surface of the device.

  FIG. 2 is a perspective view illustrating an appearance of the toner cartridge 33 of the image forming apparatus 10 according to the present embodiment. The toner cartridge 33 includes a toner cartridge case 63 provided with a shutter cover 61 at one end and a grip 62 at the other end. The toner cartridge case 63 is filled with toner of any one of yellow (Y), magenta (M), cyan (C), and black (K).

  The shutter cover 61 includes a mechanical key chip 64, an IC substrate 65, a coupling 66, and a toner supply port 67. The mechanical key chip 64 is a mechanism for preventing the toner cartridge 33 from being erroneously attached. The IC substrate 65 is mounted with a plurality of IC chips, and whether the toner cartridge 33 is new, whether it is attached / detached in the middle, the color of the stored toner, the number of consumed dots, etc. Stores history information. These pieces of information are read and written by a control unit (not shown) of the image forming apparatus 10.

  When the toner cartridge 33 is mounted on the coupling 66, a shaft from an external drive system (not shown) is engaged. The coupling 66 transmits the rotational motion of the shaft that is rotationally driven by the external drive system to a built-in transfer coil (described later). The conveying coil conveys the toner filled in the toner cartridge case 63 to the toner supply port 67 while stirring. The toner supply port 67 is an opening with a shutter for supplying toner to the developing device of the developing device 31.

  3A and 3B are perspective views illustrating the internal structure of the toner cartridge 33 of the image forming apparatus 10 according to the present embodiment. 3A shows a state in which a coil spring 73 described later is removed for comparison, and FIG. 3B shows a state in which a coil spring 73 described later is attached. In FIG. 3B, inside the toner cartridge case 63, there is a carrying coil 70 for carrying the toner, and a drive shaft 71 for rotationally driving it is connected. The drive shaft 71 is connected to a coupling 66 to which a rotational driving force transmitted from the image forming apparatus 10 side is transmitted, and a seal material (packing) 72 is provided therebetween. The transfer coil 70 has one end fixed to the drive shaft 71, and is bent as appropriate, wound in a solenoid shape along the axial direction, and then extended to the gripping portion 62 side.

  Normally, the toner is transported from the front gripping portion 62 side toward the toner replenishing port 67 by the rotation of the transport coil 70. In particular, when a new toner cartridge 33 starts to be used, a large amount of toner is present in the toner cartridge case 63, so that it is conveyed while being pressed toward the toner replenishing port 67 by the conveying operation of the conveying coil 70. The pressed pressure causes the toner in the vicinity of the toner replenishing port 67 to be in an aggregated state to form a bridge, and a phenomenon that does not easily drop from the toner replenishing port 67 occurs.

  In order to solve this aggregation state, in this embodiment, as shown in FIG. 3B, a part of the transport coil 70 is rotated around the toner supply port 67 following the rotation of the transport coil 70. A coil spring 73 is attached to freely swing. The coil spring 73 rotates in the vicinity of the toner replenishing port 67 to break the toner conveyed while being pressed in the direction of the toner replenishing port 67 by the conveying operation of the conveying coil 70.

  4A and 4B are enlarged views showing a partial internal structure of the toner cartridge 33 shown in FIG. 4A shows a state in which the coil spring 73 is removed in order to explain the structure of the transfer coil 70, and FIG. 4B shows a state in which the coil spring 73 is attached. As shown in FIG. 4A, one end of the transfer coil 70 is fixed to a drive shaft 71 to which a rotational driving force from the drive system is transmitted. The conveyance coil 70 is bent toward the shutter cover 61 at one end near the inner wall surface of the toner cartridge case 63 from the first extending portion 701 extending from the fixed end toward the inner wall surface of the toner cartridge case 63. A second extending portion 702 extending in the direction of the rotation axis, and further extending while being wound like a solenoid in the direction of the rotation axis so as to pass through the vicinity of the inner wall surface of the toner cartridge case 63 from there. And a solenoid portion 703 following the other end portion.

  As shown in FIG. 4B, the coil spring 73 swings at least at a second extending portion 702 (see FIG. 4A) that is bent at one end toward the shutter cover 61 and extends in the rotation axis direction. It is attached freely. In other words, if the second extending portion 702 is covered, the coil spring 73 is bent so as to cover a part of the first extending portion 701 extending from the drive shaft 71 toward the inner wall surface of the toner cartridge case 63. You may make it provide.

  Accordingly, the coil spring 73 rotates so as to slide in the vicinity of the inner wall surface of the toner cartridge case 63 including the vicinity of the toner supply port 67 following the rotation of the conveying coil 70. As a result, the toner conveyed while being pressed in the direction of the toner supply port 67 can be effectively broken. The density of aluminum is 2.7 g / cm ^ 3, and the density of SUS304 is 7.9 g / cm ^ 3, but the material of the coil spring 73 is preferably a density higher than that of aluminum and preferably has an appropriate elasticity. .

  5A and 5B are cross-sectional views for explaining the toner stirring effect in the toner cartridge 33 of the image forming apparatus 10 according to the present embodiment. FIG. 5A shows a state where there is no coil spring 73, and FIG. 5B shows a state where there is a coil spring 73. When the toner is in an agglomerated state in the toner cartridge case 63, if there is no coil spring 73, the area where the toner is collapsed is only the rotation area of the conveying coil wire diameter. And only between.

  On the other hand, when the coil spring 73 according to the present embodiment is provided, the toner collapses between the rotation radius indicated by the line segment L2 and the inner surface of the toner cartridge case 63, so that the collapse region is wide. If the outer diameter of the coil spring 73 is further increased, the area to be broken is further enlarged, and the breaking effect is enhanced. Moreover, the location where the coil spring 73 is attached may be enlarged and extended in the lateral direction on the outer diameter of the transfer coil 70 or connected to the drive shaft.

  On the other hand, in the present embodiment, the coil spring 73 rotates in the vicinity of the toner supply port 67, so that the toner conveyed while being pressed toward the toner supply port 67 by the transfer operation of the transfer coil 70 is effectively broken. As a result, the toner does not easily aggregate and stable toner replenishment can be performed regardless of whether the amount of toner is large or small.

  According to the above-described embodiment, the coil spring 73 for breaking the agglomerated toner is attached on the conveying coil 70 that conveys the toner near the toner supply port 67 in the toner cartridge 33. Since the flexible coil spring 73 is rotated so as to slide in the vicinity of the toner supply port 67 in accordance with the rotation operation, it is possible to make it difficult for the toner to remain undisturbed as compared with a component configuration whose shape is fixed.

  Further, according to the above-described embodiment, the flexible coil spring 73 rotates so as to slide in the vicinity of the toner supply port 67 as the conveying coil 70 rotates, so that the amount of toner in the toner cartridge 33 is small. Regardless of this, stable toner supply can be realized.

  Further, according to the above-described embodiment, the coil spring 73 has flexibility, so that it is less affected by the accuracy of the components and can stabilize the operation.

  Moreover, according to embodiment mentioned above, since the structure of the coil spring 73 is simple, it is durable and can endure long-time operation | use without a maintenance.

  Further, according to the above-described embodiment, since the structure of the coil spring 73 is simple, it is possible to reduce the load torque during the rotation operation, and it can be used without modifying the existing drive system.

  Further, according to the above-described embodiment, the coil outer diameter, length, wire diameter, pitch, and the like of the coil spring 73 can be easily changed, so that the mechanical characteristics of the toner cartridge 33 itself and the physical properties of the toner can be obtained. The degree of toner breakage can be easily adjusted according to characteristics and the like.

  Further, according to the above-described embodiment, the coil spring 73 can be procured at a low cost in terms of parts, and can be easily incorporated into the transport coil 70.

As mentioned above, although several embodiment of this invention was described, this invention is not limited to these, The invention described in the claim, and its equal range are included.
Below, the invention described in the claims of the present application is appended.

(Appendix 1)
The invention according to appendix 1 is a toner replenishing device that is detachably provided in an image forming apparatus and contains toner to be supplied to a developing device disposed in the image forming apparatus, wherein the toner is provided on one end side. A toner cartridge main body provided with a discharge port for supplying the toner to the developing device, and disposed inside the toner cartridge main body, and when the toner cartridge main body is mounted on the image forming apparatus, the image forming apparatus A conveying coil that engages with the provided driving system and rotates inside the toner cartridge main body by a rotational driving force transmitted from the driving system, and is freely disposed on the conveying coil. And a toner breaker spring that rotates so as to slide in the vicinity of the discharge port inside the toner cartridge body as the toner rotates. A charging device.

(Appendix 2)
The invention according to appendix 2 is the toner replenishing device according to appendix 1, wherein the toner breaking spring is incorporated in the transport coil.

(Appendix 3)
According to the third aspect of the present invention, the conveying coil includes a first coil coil extending from one end fixed to a driving shaft to which the rotational driving force from the driving system is transmitted and extending toward the inner wall surface of the toner cartridge body. A first extending portion, a second extending portion bent from the first extending portion in the vicinity of the inner wall surface of the toner cartridge main body and extending in the rotation axis direction, and the toner cartridge from the second extending portion. A solenoid portion extending while being wound like a solenoid in the direction of the rotation axis so as to pass through the vicinity of the inner wall surface of the main body and continuing to the other end portion, and the toner breaker spring is provided with at least the second extension The toner replenishing device according to Supplementary Note 2, wherein the toner replenishing device is provided in a freely swingable manner at the portion.

(Appendix 4)
The toner supply according to any one of appendices 1 to 3, wherein the toner breaker spring is a coil spring made of a material heavier than a density of 2.5 grams / cubic centimeter. Device.

(Appendix 5)
The invention according to appendix 5 is an image forming apparatus including a toner cartridge that is detachably provided and contains toner to be supplied to the developing device, and the toner cartridge is configured to develop the toner on one end side. A toner cartridge main body provided with a discharge port for supplying to the container, and disposed inside the toner cartridge main body, and provided in the image forming apparatus when the toner cartridge main body is attached to the image forming apparatus. A conveying coil that engages with the driving system and is rotated inside the toner cartridge body by a rotational driving force transmitted from the driving system, and is swingably disposed on the conveying coil. And a toner breaker spring that rotates so as to slide in the vicinity of the discharge port inside the toner cartridge main body. An image forming apparatus.

(Appendix 6)
The invention according to appendix 6 is the image forming apparatus according to appendix 5, wherein the toner breaking spring is incorporated in the transport coil.

(Appendix 7)
According to the seventh aspect of the present invention, in the transfer coil, the transfer coil extends from one end fixed to a drive shaft to which the rotational drive force from the drive system is transmitted, toward the inner wall surface of the toner cartridge body. A first extending portion, a second extending portion bent from the first extending portion in the vicinity of the inner wall surface of the toner cartridge main body and extending in the rotation axis direction, and the toner cartridge from the second extending portion. A solenoid portion extending while being wound like a solenoid in the direction of the rotation axis so as to pass through the vicinity of the inner wall surface of the main body and continuing to the other end portion, and the toner breaker spring is provided with at least the second extension 7. The image forming apparatus according to appendix 6, wherein the image forming apparatus is disposed in a freely swingable manner.

(Appendix 8)
The image forming apparatus according to any one of appendices 5 to 7, wherein the toner breaker spring is a coil spring made of a material heavier than a density of 2.5 grams / cubic centimeter. Device.

DESCRIPTION OF SYMBOLS 10 Image forming apparatus 20 Roll paper supply part 21 Paper feed roll 21a Media to be printed 22 Paper feed roller 23 Paper leading edge part detection part 24 Paper edge part detection part 30 Printer main body 31, 31k, 31c, 31m, 31y Drum / development apparatus 32 Transfer belt device 33 Toner cartridge 34 Electrical unit 35 Paper feed unit 36 Fixing device 37 Intermediate transfer belt 38 Driving roller 39 Driven roller 40 Toner vertical conveyance path 41 Secondary transfer backup roller 42 Secondary transfer roller 44 Feeding roller 45 Face up unit 46 Paper discharge tray 50 Roll paper take-up part 51 Take-up roll 61 Shutter cover 62 Grip part 63 Toner cartridge case 64 Mechanical key chip 65 IC board 66 Coupling 67 Toner supply port 70 Conveying coil 701 First extending part 702 Second Portion 703 solenoid unit 71 the drive shaft 72 sealing material (packing)
73 Coil spring

Claims (8)

A toner replenishing device that is detachably provided in an image forming apparatus and contains toner for supplying to a developing device disposed in the image forming apparatus,
A toner cartridge body provided with a discharge port for supplying the toner to the developer on one end side;
A rotational driving force that is disposed inside the toner cartridge main body and is engaged with a driving system provided in the image forming apparatus and transmitted from the driving system when the toner cartridge main body is attached to the image forming apparatus. A transfer coil that rotates inside the toner cartridge body,
A toner breaker spring disposed in the transport coil so as to freely swing, and rotating so as to slide in the vicinity of the discharge port in the toner cartridge body as the transport coil rotates;
And a toner replenishing device. The toner breaker spring is incorporated in the transport coil,
The toner replenishing device according to claim 1. The transfer coil is
From one end fixed to the drive shaft to which the rotational driving force from the drive system is transmitted, a first extension extending from the first extension toward the inner wall surface of the toner cartridge main body, and the first extension A second extending portion that is bent in the vicinity of the inner wall surface of the toner cartridge body and extends in the direction of the rotation axis; and a rotation axis direction so as to pass through the vicinity of the inner wall surface of the toner cartridge body from the second extension portion. A solenoid portion extending while being wound in a solenoid shape and continuing to the other end portion,
The toner breaker spring is disposed at least freely on the second extending portion so as to freely swing.
The toner replenishing device according to claim 2. The toner breaking spring is a coil spring made of a material heavier than a density of 2.5 grams / cubic centimeter.
The toner replenishing device according to claim 1, wherein the toner replenishing device is a toner replenishing device. An image forming apparatus that includes a toner cartridge that detachably accommodates toner to be supplied to a developing device,
The toner cartridge is
A toner cartridge body provided with a discharge port for supplying the toner to the developer on one end side;
A rotational driving force that is disposed inside the toner cartridge main body and is engaged with a driving system provided in the image forming apparatus and transmitted from the driving system when the toner cartridge main body is attached to the image forming apparatus. A transfer coil that rotates inside the toner cartridge body,
A toner breaker spring disposed in the transport coil so as to freely swing, and rotating so as to slide in the vicinity of the discharge port in the toner cartridge body as the transport coil rotates;
An image forming apparatus comprising: The toner breaker spring is incorporated in the transport coil,
The image forming apparatus according to claim 5. The transfer coil is
From one end fixed to the drive shaft to which the rotational driving force from the drive system is transmitted, a first extension extending from the first extension toward the inner wall surface of the toner cartridge main body, and the first extension A second extending portion that is bent in the vicinity of the inner wall surface of the toner cartridge body and extends in the direction of the rotation axis; and a rotation axis direction so as to pass through the vicinity of the inner wall surface of the toner cartridge body from the second extension portion. A solenoid portion extending while being wound in a solenoid shape and continuing to the other end portion,
The toner breaker spring is disposed at least freely on the second extending portion so as to freely swing.
The image forming apparatus according to claim 6. The toner breaking spring is a coil spring made of a material heavier than a density of 2.5 grams / cubic centimeter.
The image forming apparatus according to claim 5, wherein the image forming apparatus is an image forming apparatus.

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