Developer Box

Abstract

The present invention provides a developing box, which includes a box body, a developing roller, a driving force receiving head, a detection mechanism, a transmission shaft and a sleeve. The box body has a carbon powder accommodating portion and a powder outlet, the developing roller is rotatably supported at the powder outlet, the driving force receiving head is arranged on the first end wall of the box body, and a tooth portion is arranged on the peripheral wall of the driving force receiving head. The detection mechanism is arranged on the second end wall of the box body. The transmission shaft is columnar and extends along the length direction of the box body. The transmission shaft is rotatably installed in the carbon powder accommodating portion. The first end of the transmission shaft is provided with a first driving wheel, the first driving wheel and the driving force receiving head are located on the same side of the box body, and the first driving wheel is connected to the driving force receiving head by transmission. The second end of the transmission shaft is provided with a second driving wheel, and the second driving wheel cooperates with a rotating member. An installation cavity isolated from the carbon powder accommodating portion is formed in the sleeve, the transmission shaft is located in the installation cavity, and the transmission shaft and the sleeve are in clearance. The developing box can reduce the torque generated by rotation.

Description

Technical Field

[0001] The invention relates to the field of electronic photographic imaging, in particular to a developing box. Background Art

[0002] Imaging devices usually use a detachable developer cartridge to provide toner to develop the electrostatic latent image on the photosensitive component and then transfer it to a medium such as paper to form a visible image.

[0003] An existing developing box includes a box body, wherein the two axial ends of the box body are respectively provided with a driving head and a detection wheel with missing teeth, the box body is provided with a developer containing chamber for containing developer and a powder outlet, the developer containing chamber is provided with a stirring frame for stirring the developer, the developing roller is arranged at the powder outlet, the gear system for driving the stirring frame and the developing roller to rotate is installed on the outer side of the box body, the first axial end of the stirring frame is provided with a first stirring gear, the driving head and the first stirring gear are both meshed with the intermediate transmission gear and transmit the rotational driving force to the stirring frame, the second axial end of the stirring frame is provided with a second stirring gear, the detection wheel can be meshed with the second stirring gear, and a contact protrusion for triggering the contacted member in the imaging device is provided on the detection wheel. When a new developing box is installed in the imaging device, the driving gear is driven to rotate, driving the detection gear meshed with it to rotate, the contact protrusion on the detection gear rotates and triggers the contacted member in the imaging device, and the imaging device detects that the developing box is new. When the detection gear rotates to the point where the missing tooth portion faces the driving gear, it is no longer meshed with the driving gear, and the detection gear no longer rotates with the rotation of the driving gear.

[0004] In order to solve the problem that when the driving head drives the developing roller, the powder feeding roller and the stirring frame to rotate, the driving force receiving head is subjected to large rotational twisting force and torque, which easily damages the transmission head in the imaging device, etc., the applicant disclosed a developing box in the patent document with publication number CN110727186A, which transmits the rotational driving force by setting a transmission shaft to reduce the rotational torque. However, in actual use, the toner containing portion of the developing box is filled with toner. Therefore, when the transmission shaft rotates to transmit the driving force, the outer peripheral wall of the transmission shaft will form friction with the ground and the toner. The friction needs to be overcome to generate torque during the rotation of the transmission shaft. Therefore, the transmission head of the imaging device will still be subjected to a large torque, which will shorten the service life of the imaging device. Summary of the invention

[0005] An object of the present invention is to provide a developing box capable of reducing torque generated by rotation.

[0006] To achieve the above-mentioned purpose, the developer box provided by the present invention includes a box body, a developing roller, a driving force receiving head, a detection mechanism, a transmission shaft and a sleeve, the box body has a carbon powder accommodating portion and a powder outlet, the developing roller is rotatably supported at the powder outlet, the driving force receiving head is arranged on the first end wall of the box body, and is used to receive the rotational driving force, and the peripheral wall of the driving force receiving head is provided with a tooth portion, the detection mechanism is arranged on the second end wall of the box body, the detection mechanism includes a rotating member, the transmission shaft extends along the length direction of the box body, the transmission shaft is rotatably installed in the carbon powder accommodating portion, the first end of the transmission shaft is provided with a first driving wheel, the first driving wheel and the driving force receiving head are located on the same side of the box body, and the first driving wheel is connected to the driving force receiving head in a transmission manner. The second end of the transmission shaft is provided with a second driving wheel, the second driving wheel cooperates with the rotating member and transmits the driving force to the rotating member. An installation cavity isolated from the carbon powder accommodating portion is formed in the sleeve, the transmission shaft is located in the installation cavity, and the transmission shaft and the sleeve are in clearance.

[0007] It can be seen from the above scheme that the rotational driving force is transmitted by setting a transmission shaft, and the rotational driving force is no longer transmitted through the stirring frame with stirring blades. At the same time, a sleeve is set outside the transmission shaft to separate the transmission shaft from the toner in the toner container. The transmission shaft does not contact the toner during the rotation process, thereby further reducing the rotation torque, protecting the transmission head of the printer, and effectively ensuring the rotational movement of the rotating part, so as to achieve accurate detection with the printer detection unit. In addition, the driving force receiving head and the detection mechanism are respectively arranged at both ends of the length direction of the box body, which can reduce the size of the developer box in the width direction, thereby realizing the miniaturization of the developer box. In addition, since the transmission shaft is located in the sleeve, the shape and structure of the transmission shaft are not required to be high, and the existing stirring frame can be reused, thereby saving costs.

[0008] A preferred solution is that the sleeve is detachably fixedly connected to the box body.

[0009] A further solution is that a support seat is provided in the box body, and the first end of the sleeve is supported on the support seat.

[0010] A preferred solution is that a positioning protrusion is provided on the inner wall of the second end wall, the first end of the sleeve is inserted into the positioning protrusion, and the second end of the sleeve abuts against the inner wall of the first end wall.

[0011] This shows that the installation and positioning of the sleeve is facilitated.

[0012] A further solution is that the first end wall is provided with a first through hole, the second end wall is provided with a second through hole arranged opposite to the first through hole in the length direction of the box body, the second through hole passes through the second end wall and the positioning protrusion. The first end of the transmission shaft passes through the first through hole, and the second end of the transmission shaft passes through the second through hole.

[0013] A preferred solution is that the transmission shaft is cylindrical and the sleeve is cylindrical.

[0014] A further solution is that the transmission shaft and the sleeve are coaxially arranged.

[0015] A preferred solution is that a tooth portion is provided on the peripheral wall of the driving force receiving head, and the first driving wheel meshes with the tooth portion.

[0016] A preferred solution is that a tooth portion is provided on the peripheral wall of the driving force receiving head, and the developing box further includes an intermediate transmission gear, and the tooth portion and the first driving wheel are both engaged with the intermediate transmission gear.

[0017] A preferred solution is that a developing bracket is provided on the inner side surface of the first end wall of the box body, the axial end of the developing roller is supported by the developing bracket, and the developing bracket is detachably connected to the box body.

[0018] It can be seen that the developing bracket is separately arranged on the inner side of the box body, which is convenient for the inspection and replacement of the developing roller when the powder box is recycled and reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural exploded view of an embodiment of a developer box of the present invention.

[0020] Figure 2 It is a cross-sectional view of the first position of the developer box embodiment of the present invention.

[0021] Figure 3 It is a cross-sectional view of the second position of the developer box embodiment of the present invention.

[0022] Figure 4 It is a structural diagram of the transmission shaft, gear train and detection mechanism in the developing box embodiment of the present invention.

[0023] Figure 5 1 is a structural diagram of the gear train in the developing box embodiment of the present invention.

[0024] Figure 6 It is a partial view behind the hidden parts of the developing box in the developing box embodiment of the present invention.

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0026] See also Figures 1 to 3 The developing box in this embodiment includes a box body 1, an end cover 15, an end cover 16, a developing roller 2, a powder feeding roller 6, a driving force receiving head 3, a detection mechanism 4, a transmission shaft 5, a sleeve 7 and a conductive component 8.

[0027] The box body 1 has a toner holding portion 11 and a powder outlet 12, the developing roller 2 is rotatably supported at the powder outlet 12, a developing roller gear 21 is provided at the axial end of the developing roller 2, a powder feeding roller 6 is rotatably supported in the toner holding portion 11 and is adjacent to the developing roller 2, the powder feeding roller 6 is used to transfer the toner in the toner holding portion 11 to the developing roller 2, and a powder feeding roller gear 61 is provided at the axial end of the powder feeding roller 6.

[0028] The end cover 16 is mounted on the first end wall 13, the driving force receiving head 3 is arranged on the first end wall 13 of the box body 1 and is located between the end cover 16 and the first end wall 13, and the driving force receiving head 3 is used to receive the rotational driving force transmitted by the transmission head of the imaging device. A developing bracket 130 is arranged on the inner side of the first end wall 13, and one axial end of the developing roller 2 is supported by the developing bracket 130. The developing bracket 130 is detachably connected to the box body 1, and the developing bracket 130 is separately arranged on the inner side of the box body 1, which is convenient for the inspection and replacement of the developing roller 2 when the powder box is recycled and reused.

[0029] The end cover 15 is mounted on the second end wall 14, the detection mechanism 4 and the conductive component 8 are located between the second end wall 14 and the end cover 15, the transmission shaft 5 is cylindrical and extends along the length direction of the box body 1, and the transmission shaft 5 is rotatably supported in the toner accommodating portion 11. The conductive component 8 is mounted on the second end wall 14 and a portion of the conductive component 8 is exposed from the end cover 15 for electrical connection with the printer. The developing roller 2 and the powder feeding roller 6 are both electrically connected to the conductive component 8.

[0030] See also Figures 3 to 6 , a first driving wheel 51 is provided at the first end of the transmission shaft 5, a tooth portion 31 is provided on the peripheral wall of the driving force receiving head 3, the developing roller gear 21, the powder feeding roller gear 61 and the intermediate transmission gear 53 are all meshed with the tooth portion 31, and the first driving wheel 51 is connected to the driving force receiving head 3 through the intermediate transmission gear 53. The driving force receiving head 3, the developing roller gear 21, the powder feeding roller gear 61, the intermediate transmission gear 53 and the first driving wheel 51 form a gear train for transmitting driving force, and the gear train is installed on the first end wall 13. Optionally, the shape of the cross section of the transmission shaft can also be a rectangular, triangular, pentagonal, elliptical or the like, or an irregular shape, or the transmission shaft can also be a screw, or a rod portion of a stirring frame in an existing powder box. In this embodiment, the transmission shaft is cylindrical.

[0031] The sleeve 7 is cylindrical, and a mounting cavity 71 is formed in the sleeve 7, which is isolated from the carbon powder containing portion 11. The transmission shaft 5 is located in the mounting cavity 71, so that the carbon powder in the carbon powder containing portion 11 cannot enter the mounting cavity 71, and the transmission shaft 5 will not contact the carbon powder during rotation. The transmission shaft 5 and the sleeve 7 are clearance-matched, and the transmission shaft 5 and the sleeve 7 are coaxially arranged, and the inner diameter of the sleeve 7 is larger than the outer diameter of the transmission shaft 5, so that the transmission shaft 5 will not contact the inner wall of the sleeve 7 during rotation.

[0032] The sleeve 7 is detachably fixedly connected to the box body 1. A support seat 17 is provided in the box body 1, and the first end 72 of the sleeve 7 is supported on the support seat 17. A positioning protrusion 141 is provided on the inner wall of the second end wall 14 of the box body 1. The first end 72 of the sleeve 7 is inserted into the positioning protrusion 141, and the second end 73 of the sleeve 7 abuts against the inner wall of the first end wall 13 of the box body 1. The first end wall 13 is provided with a first through hole 131, and the second end wall 14 is provided with a second through hole 142 which is arranged opposite to the first through hole 131 in the length direction of the box body 1, and the second through hole 142 passes through the second end wall 14 and the positioning protrusion 141. The first end of the transmission shaft 5 passes through the first through hole 131 and is connected to the first driving wheel 51. The second end of the transmission shaft 5 passes through the second through hole and is connected to the second driving wheel 52. The second driving wheel 52 cooperates with the rotating part 41 of the detection mechanism 4 and transmits driving force to the rotating part 41. The second driving wheel 52 has an interference fit with the large diameter portion 414 of the clutch wheel 411 on the rotating part 41 and can have a clearance fit with the small diameter portion (not shown) of the clutch wheel 411.

[0033] See also Figure 5 The detection mechanism 4 includes a rotating member 41, a contact member 42, an elastic member 43 and a forced pushing member 44. The specific structure of the detection mechanism 4 is the same as the detection mechanism of the powder box disclosed in the patent document CN110727186A, and will not be repeated here.

[0034] When the developing box is working, the driving force receiving head 3 receives the driving force and rotates, driving the first driving wheel 51 to rotate, thereby driving the transmission shaft 5 and the second driving wheel 52 to rotate, and the large diameter portion 414 of the clutch wheel 411 of the rotating member 41 is interference fit with the friction layer 522 of the second driving wheel 52, and the rotating member 41 is driven by the friction between the two, causing the rotating member 41 to rotate, thereby completing the triggering of the contacted component 100, and the developing box is new and the capacity information of the developing box is transmitted to the imaging device. Since the transmission shaft 5 is located in the installation cavity 71 of the sleeve 7, it will not contact the toner in the toner accommodating portion 11 during the rotation process, thereby further reducing the rotation torque.

[0035] As can be seen from the above, the rotational driving force is transmitted by setting a transmission shaft, and the rotational driving force is no longer transmitted through the stirring frame with stirring blades. At the same time, a sleeve is set outside the transmission shaft to separate the transmission shaft from the toner in the toner holding portion. The transmission shaft does not contact the toner during the rotation process, thereby further reducing the rotational torque, protecting the transmission head of the printer, and effectively ensuring the rotational movement of the rotating part, and realizing accurate detection with the printer detection unit. In addition, the driving force receiving head and the detection mechanism are respectively arranged at both ends of the length direction of the box body, which can reduce the size of the developer box in the width direction, thereby realizing the miniaturization of the developer box. In addition, since the transmission shaft is located in the sleeve, the requirements for the shape and structure of the transmission shaft are not high, and the existing stirring frame can be reused, thereby saving costs.

[0036] In addition, the first drive wheel can also directly mesh with the teeth on the peripheral wall of the driving force receiving head. The second drive wheel can also be connected to the rotating member through an intermediate transmission gear. The sleeve can also be integrally formed with the box body. The shape of the sleeve and the shape of the transmission shaft can be changed as needed. The second drive wheel can also be a gear. The friction layer arranged on the second drive wheel can also be made of a hard material, and the hard material can be plastic, etc., and the surface where the friction layer contacts the elastic friction layer has a pattern or friction protrusion that increases the friction force of the friction layer. An installation groove can also be provided on the peripheral wall of the second drive wheel, and the friction layer is installed in the installation groove with an interference fit, so as to achieve the positioning of the friction layer. The above changes can also achieve the purpose of the present invention.

[0037] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A developing box, comprising: A box body, wherein the box body has a carbon powder containing portion and a powder outlet; A developing roller, the developing roller being rotatably supported at the powder outlet; A driving force receiving head, the driving force receiving head is arranged on the first end wall of the box body, and is used to receive the rotational driving force, and a tooth portion is arranged on the peripheral wall of the driving force receiving head; A detection mechanism, the detection mechanism is arranged on the second end wall of the box body, and the detection mechanism includes a rotating member; A transmission shaft, the transmission shaft extends along the length direction of the box body, the transmission shaft is rotatably installed in the toner containing portion, a first driving wheel is provided at the first end of the transmission shaft, the first driving wheel and the driving force receiving head are located on the same side of the box body, the first driving wheel is drivingly connected with the driving force receiving head, and a second driving wheel is provided at the second end of the transmission shaft, the second driving wheel cooperates with the rotating member and transmits the driving force to the rotating member; Features: The developing box also includes a sleeve, in which a mounting cavity isolated from the toner containing portion is formed, the transmission shaft is located in the mounting cavity, the transmission shaft is loosely matched with the sleeve, and the transmission shaft will not contact the inner wall of the sleeve during rotation.

2. The developing cartridge according to claim 1, characterized in that: The sleeve is detachably fixedly connected to the box body.

3. The developing cartridge according to claim 2, characterized in that: A support seat is arranged in the box body, and the first end of the sleeve is supported on the support seat.

4. The developing cartridge according to claim 2, wherein: A positioning protrusion is arranged on the inner wall of the second end wall, the first end of the sleeve is inserted into the positioning protrusion, and the second end of the sleeve is in contact with the inner wall of the first end wall.

5. The developing cartridge according to claim 4, characterized in that: The first end wall is provided with a first through hole, the second end wall is provided with a second through hole which is arranged opposite to the first through hole in the length direction of the box body, and the second through hole passes through the second end wall and the positioning protrusion; The first end of the transmission shaft passes through the first through hole, and the second end of the transmission shaft passes through the second through hole.

6. The developing cartridge according to any one of claims 1 to 5, characterized in that: The transmission shaft is cylindrical, and the sleeve is cylindrical.

7. The developing cartridge according to claim 6, characterized in that: The transmission shaft is coaxially arranged with the sleeve.

8. The developer cartridge according to any one of claims 1 to 5, characterized in that: A tooth portion is provided on the peripheral wall of the driving force receiving head, and the first driving wheel is meshed with the tooth portion.

9. The developer cartridge according to any one of claims 1 to 5, characterized in that: A tooth portion is arranged on the peripheral wall of the driving force receiving head, and the developing box further comprises an intermediate transmission gear, and the tooth portion and the first driving wheel are both meshed with the intermediate transmission gear.

10. The developing cartridge according to any one of claims 1 to 5, characterized in that: A developing support is disposed on the inner side surface of the first end wall of the box body, the axial end of the developing roller is supported by the developing support, and the developing support is detachably connected to the box body.

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