CN201156162Y - developer cartridge - Google Patents

Abstract

The utility model provides a developer box, which comprises a box body containing developer, and a rotatable spiral powder-conveying stand is longitudinally arranged inside the box body; a transmission component, which is arranged on the front end of the box body, comprises a transmission gear and a gear shaft thereof, and the rear end of the gear shaft is firmly connected with the front end of the powder-conveying stand; a powder outlet is arranged on the circumferential wall of the box body, which is close to the transmission component; wherein, the rear end of the gear shaft is extended to the transverse inner side of the powder outlet or near the powder outlet, the gear shaft is provided with a helical blade spiraling in a direction reverse to the powder-conveying stand. While operating, the transmission component of the developer box with the structure not only can drive the powder-conveying stand to rotate to feed powder but also can utilize the helical blade on the gear shaft to discharge the developer left on the front end of the box body out of the powder outlet, so, not only can the developer be prevented from piling up and being agglomerated to affect printing quality, but also the developer in the box body can be sufficiently used, consequently, environment is protected, and cost is saved.

Description

developer cartridge

technical field

The utility model relates to a developer box used in developing devices of imaging equipment such as laser printers and duplicators, in particular to a developer box with a cylindrical structure.

Background technique

In imaging equipment such as laser printers and copiers, the developer cartridge is detachably installed in its developing device, and the developer is supplied to the developing chamber of the developing device through the powder outlet, and then passed through the developing roller in the developing chamber To the photosensitive drum of the developing device for developing work, and then complete the electronic imaging work.

There is a developer cartridge, as shown in Figure 1 and Figure 2, which includes an inner chamber 1' with an inner opening and an outer chamber 2' with an outer opening, the inner chamber 1' is rotatably assembled in the outer chamber 2' and make sliding contact with it. When the inner chamber 1' rotates to an appropriate phase relative to the outer chamber 2', the inner opening is aligned with the outer opening to form a powder outlet 3' for discharging developer outward; when the inner opening and the outer opening are staggered, the powder outlet 3' is closed to stop the discharge of the developer. The inner chamber 1' is basically in the shape of a cylinder, in which developer is contained, and a rotatable helical powder feeding frame 4' is distributed along the longitudinal direction. The front end of the inner compartment 1' is fixedly connected to the front end cover 5' with a handle. The front end cover 5' is provided with a transmission assembly consisting of a transmission gear 6' and a gear shaft 7'. The rear end of the gear shaft 7' is connected to the The front end of the powder feeding rack 4' is affixed. At the position corresponding to the transmission gear 6' on the peripheral wall of the front end cover 5', a long and narrow cut is provided, whereby the transmission gear 6' can be driven by the driving device on the imaging device, and then drive the powder feeding frame 4' to rotate together, The developer in the inner chamber 1' is conveyed to the powder outlet 3', so as to achieve the purpose of powder feeding, and at the same time, the developer in the inner chamber 1' is stirred.

In the developer cartridge with the above structure, since the powder outlet 3' is not located at the front end of the inner and outer chambers, but is about 20 mm away from the front end; the above-mentioned spiral powder feeding frame 4' only has a one-way powder feeding function , the transmission assembly at the end of the inner chamber only has the function of driving the powder feeding frame 4' to rotate, and does not have the function of powder feeding, and the gear shaft 7' of the transmission assembly and the front end of the powder feeding frame 4' are just located at the powder outlet 3 ' and the front end of the inner chamber 1', even if the transmission assembly and the powder feeding frame 4' are continuously rotated and stirred, a certain amount of developer will still accumulate in this space, resulting in waste and not conducive to environmental protection; and In the initial use state of the developer cartridge, that is, when there is a lot of developer, the fluidity of the developer near the powder outlet is greatly reduced, which leads to the agglomeration of the developer and affects the printing quality.

Contents of the invention

The purpose of the utility model is to provide a developer box which can prevent the developer from gathering at the front end of the box body and can fully utilize the developer.

In order to achieve the above object, the utility model provides a developer box, which includes a box body containing the developer, inside the box body there is a rotatable spiral powder feeding frame distributed along the longitudinal direction; the front end of the box body is provided with a transmission assembly, The transmission assembly includes a transmission gear and its gear shaft, the rear end of the gear shaft is fixedly connected to the front end of the powder feeding rack; a powder outlet is provided on the box body wall close to the transmission assembly; wherein, the gear The rear end of the shaft extends to the lateral inner side of the powder outlet, or extends to the vicinity of the lateral inner side of the powder outlet; the gear shaft is provided with a helical blade opposite to the helical direction of the powder feeding frame.

A further solution is that a spiral groove is provided on the outer peripheral surface of the gear shaft, and a positioning post is provided on the side of the spiral groove; the spiral blade is positioned and fixed in the spiral groove by welding through the positioning post. In this way, the shaping of the transmission assembly is relatively simple, and the firmness of the connection between the helical blade and the gear shaft can be ensured.

Preferably, there are two helical grooves and two helical blades; the free ends of the helical blades are close to the inner wall of the box to ensure the powder feeding effect.

A further solution is that the box body is composed of an inner compartment with an inner opening and an outer compartment with an outer opening, the inner compartment is rotatably assembled in the outer compartment, and the inner opening is aligned or staggered with the outer opening; The powder outlet is composed of an inner opening and an outer opening when aligned.

A sealing cover is also provided between the helical blade and the transmission gear, and the gear shaft passes through the center of the sealing cover to prevent the developer from leaking at the front end of the box body.

When the transmission assembly of the developer cartridge with the above structure is working, in addition to driving the powder feed frame to rotate and feed powder, it also uses the helical blade on the gear shaft to send the developer staying at the front end of the box body to the powder outlet for discharge. , not only can prevent the accumulation and agglomeration of the developer from affecting the printing quality, but also can make full use of the developer in the box, which is conducive to environmental protection and cost saving.

Description of drawings

Below in conjunction with accompanying drawing, the specific embodiment of the utility model is described in further detail.

Figure 1 is a schematic structural view of a conventional developer cartridge;

Fig. 2 is an exploded view of parts of the developer cartridge shown in Fig. 1;

Fig. 3 is an exploded view of parts of a preferred embodiment of the present invention;

Fig. 4 is a schematic view of the powder outlet of the embodiment shown in Fig. 3 in working state;

Fig. 5 is a schematic structural diagram of the transmission assembly of the embodiment shown in Fig. 3 .

Detailed ways

Referring to Fig. 3, the preferred embodiment of the utility model comprises a box body composed of an inner warehouse 1 and an outer warehouse 2, the box body has a front end and a rear end, the front end is provided with a front end cover 3 with a handle 31, and the rear end is provided with a handle 31. A rear end cover 4 with a handle 41 is provided at the end, and a transmission assembly 7 is arranged inside the front end cover 3 .

The inner case 1 is rotatably fitted in and in sliding contact with the outer case 2 . The inner chamber 1 is basically cylindrical, and there are rotatable helical powder feeding racks 5 longitudinally distributed inside it. The powder feeding frame 5 in the present embodiment is a helical coil type, made of stainless steel or iron wire with a specified outer diameter and a specified pitch. But it can also be other forms of powder feeding frame disclosed in the prior art, such as helical blade type and the like. A developer storage chamber 21 is formed near the rear end of the outer compartment 2 , and the developer storage chamber 21 has an openable cover 22 , which is convenient for filling the developer storage chamber 21 with developer. The part of the outer chamber except the developer storage chamber is also basically cylindrical so as to match the shape of the inner chamber.

The inner chamber 1 has a communication port (not shown) at a position corresponding to the developer storage chamber 21. When the inner chamber 1 is rotated to a proper position relative to the outer chamber 2, the communication port connects the developer storage chamber 21 with the inner chamber 1. The inner cavities of the two are connected to each other, so that the developer in the developer storage chamber 21 falls into the inner chamber, and is transported by the powder feeding rack 5 .

The front end cover 3 is fastened to the front end of the inner compartment 1 , and the inner compartment 1 and the outer compartment 2 are respectively provided with an inner opening 11 and an outer opening 23 on the peripheral walls close to the front end cover 3 . The operator can rotate the front cover 3 by holding the handle 31, thereby driving the inner compartment 1 to rotate relative to the outer compartment 2, so that the inner opening 11 of the inner compartment 1 and the outer opening 23 of the outer compartment 2 are aligned or staggered. Referring to Fig. 4, when they are aligned with each other, the inner opening 11 and the outer opening 23 jointly constitute the powder outlet 6 of the box body, and the developer in the inner chamber 1 can be discharged from the powder outlet 6; when they are staggered from each other, the The powder outlet is closed and the developer cannot be discharged.

4 and 5, the transmission assembly 7 includes a transmission gear 71, a gear shaft 72 and a sealing cover 73, and the rear end 76 of the gear shaft 72 extends to the lateral inner side of the powder outlet 6 or its vicinity, that is, the rear end 76 is exactly It is located in the lateral projection area of the powder outlet 6 or close to this area, and is fixedly connected to the front end of the powder feeding frame 5 . As shown in Figure 5, the outer peripheral surface of the gear shaft 72 is provided with two helical grooves 74 opposite to the helical direction of the powder feeding frame 5, and the sides of each helical groove 74 are respectively positioned by two positioning columns for a helical blade 75, And the helical blade 75 is welded and fixed in the helical groove 74 . The helical direction of the spiral blade 74 is opposite to that of the powder feeding frame 5 , and its free end is close to the inner wall of the inner chamber 1 . The front end of the gear shaft 72 is supported on the bearing inside the end face of the front end cover 3 . The sealing cover 73 is located between the helical blade 75 and the transmission gear 71 , and the gear shaft 72 passes through its center. As shown in Figure 4, on the circumferential wall of the front end cover 3 corresponding to the position of the transmission gear 71, there is a long and narrow cutout 32, whereby the transmission gear 71 can be driven by the driving device on the imaging device, and then drive the powder feeding frame 5 to rotate together , to stir the developer in the inner bin 1, and transport the developer in the inner bin 1 to the powder outlet 6 for discharge; at the same time, when the transmission assembly 7 is rotating, the helical blade on the gear shaft 72 can also be used 74 Send the developer staying at the front end of the inner chamber 1 to the powder outlet 6 to be discharged, so that the developer in the box can be fully utilized, which is beneficial to environmental protection and cost saving, and can also prevent the accumulation and agglomeration of the developer from affecting the printing quality .

Claims (6)

1. Developer cartridge, including a box for accommodating developer; There are rotatable spiral powder feeding racks distributed longitudinally inside the box; The front end of the box body is provided with a transmission assembly, the transmission assembly includes a transmission gear and its gear shaft, and the rear end of the gear shaft is fixedly connected to the front end of the powder feeding frame; A powder outlet is provided on the surrounding wall of the box close to the transmission assembly; It is characterized by: The rear end of the gear shaft extends to the lateral inner side of the powder outlet or its vicinity; The gear shaft is provided with a helical blade opposite to the helical direction of the powder feeding frame. 2. The developer cartridge according to claim 1, wherein: The outer peripheral surface of the gear shaft is provided with a helical groove, and the side of the helical groove has a positioning column; the helical blade is positioned and welded in the helical groove through the positioning column. 3. The developer cartridge according to claim 2, wherein: There are two spiral grooves, and two spiral blades. 4. The developer cartridge according to claim 3, wherein: The free end of the helical blade is close to the inner wall of the box body. 5. The developer cartridge according to any one of claims 1 to 4, characterized in that: The box body is composed of an inner compartment with an inner opening and an outer compartment with an outer opening, the inner compartment is rotatably assembled in the outer compartment, and the inner opening is aligned or staggered with the outer opening; The powder outlet is composed of an inner opening and an outer opening when aligned. 6. The developer cartridge according to any one of claims 1 to 4, characterized in that: A seal cover is also provided between the helical blade and the transmission gear, and the gear shaft passes through the center of the seal cover.

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