CN215181418U

CN215181418U - Conductive holder and developing cartridge

Info

Publication number: CN215181418U
Application number: CN202121509075.4U
Authority: CN
Inventors: 刘录军; 万成昌
Original assignee: Zhongshan Sanrun Printing Supplies Co ltd; Ninestar Corp
Current assignee: Zhongshan Sanrun Printing Supplies Co ltd; Ninestar Corp
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2021-12-14
Anticipated expiration: 2031-07-02

Abstract

The utility model relates to a conductive support and developing box, conductive support is used for installing on developing box to receive electric power supply to developing box from the outside, conductive support includes the support and the electrically conductive piece of inter combination, the support is fixed mounting on developing box, and electrically conductive piece is connected with external contact electricity, support and electrically conductive piece are moulded plastics through the secondary and are formed an organic whole, and this scheme is favorable to reducing the spare part quantity of developing box, reduces developing box's equipment step.

Description

Conductive holder and developing cartridge

Technical Field

The utility model relates to an electronic photograph imaging field especially relates to a detachably installs the development box in electronic photograph imaging equipment and installs the electrically conductive support on the development box.

Background

There is a developing cartridge detachably mountable in office equipment such as a laser printer, in which toner required for development is accommodated, and which supplies the toner to the outside when the laser printer is operated.

When the developing box works, the developing box needs to receive power from the laser printer so as to form an electric field between each part and promote the dotted carbon powder particles to reach the position required by developing. Generally, a developing roller for supplying toner to the outside and a toner feeding roller in contact with the developing roller are rotatably disposed in the developing cartridge, and the toner feeding roller is used for supplying toner to the developing roller, so that a conductive member electrically connected to the developing roller and the toner feeding roller, respectively, and an insulating member disposed between the conductive members are further disposed on the developing cartridge, which makes the assembly process of the conventional developing cartridge complicated, and is not favorable for reducing the material cost and the assembly cost of the developing cartridge.

SUMMERY OF THE UTILITY MODEL

The utility model provides a conductive support to the spare part quantity and the equipment step of developing the box are reduced in phase, and concrete scheme is as follows:

and a conductive bracket for being mounted on the developing cartridge and receiving power supply from the outside to the developing cartridge, the conductive bracket including a bracket and a conductive member combined with each other, the bracket being fixedly mounted on the developing cartridge, the conductive member being electrically connected with the external contact, the bracket and the conductive member being integrally formed by secondary injection molding.

The electrically conductive support includes the supporting part that corresponds with the part in the developing cartridge, the supporting part includes first holding tank, second holding tank and spread groove, and first holding tank of spread groove intercommunication and second holding tank are formed along first holding tank, second holding tank and spread groove to electrically conductive piece.

The bracket has an inner side facing the inside of the developing cartridge and an outer side away from the inside of the developing cartridge, and the first accommodation groove is recessed from the inner side of the bracket toward the outer side.

The holder has an inner side facing the inside of the developing cartridge and an outer side remote from the inside of the developing cartridge, and the first accommodation groove protrudes outward from the outer side of the holder when viewed from the outside of the developing cartridge.

The conductive member includes a first contact electrically connected with a component in the developing cartridge, a second contact electrically connected with an outside, and a connecting member connecting the first contact and the second contact, the first contact being accommodated by the first accommodating groove, the second contact being accommodated by the second accommodating groove, the connecting member being accommodated by the connecting groove.

The utility model also provides a developing box, including the casing that holds the carbon powder, rotatably install the developer roll in the casing and send the powder roller and install the electrically conductive support on the terminal face of casing, electrically conductive support includes by the support of fixed mounting on the casing and with the electrically conductive piece that the support combines, electrically conductive piece is used for receiving electric power in order to supply to developer roll and send the powder roller from the outside, support and electrically conductive piece are moulded plastics integratively through the secondary and are formed.

Drawings

Fig. 1 is a partially exploded view of a driving end of a developing cartridge according to the present invention.

Fig. 2 is a perspective view of the inside of the driving end cap in the developing cartridge according to the present invention.

Fig. 3 is a perspective view of the driving end of the developing cartridge according to the present invention after the driving end cover is hidden.

Fig. 4 is a perspective view of the developing cartridge according to the present invention when viewed from the conductive end.

Fig. 5 is an exploded view of the conductive holder in the developing cartridge according to the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The developing cartridge 10 is detachably mountable to an electrophotographic image forming apparatus, and has a driving end F for receiving a driving force from the electrophotographic image forming apparatus and a conductive end E for receiving power from the electrophotographic image forming apparatus. The developing cartridge 10 includes a housing 1 containing toner, a developing roller and a powder feeding roller rotatably mounted in the housing 1, a driving end cap 2 at a driving end of the housing 1, and a conductive end cap 5 at a conductive end of the housing 1.

As shown in fig. 1, the developing cartridge 10 further includes a driving force receiving member 4 at a driving end and a gear assembly 3 coupled to the driving force receiving member 4, the driving force receiving member 4 receiving a driving force from the electrophotographic image forming apparatus when the developing cartridge 10 is operated, and the developing roller and the powder feeding roller are driven to rotate by the gear assembly 3. Further, the driving end cap 2 covers at least a part of the driving force receiving member 4 and at least a part of the gear assembly 3, the gear assembly 3 includes a driving force receiving gear 31, a powder feed roller gear 32, a developing roller gear 33 (shown in fig. 3), an intermediate gear 34, and a counter gear 36, the powder feed roller gear 32 and the developing roller gear 33 are respectively located at the ends of the powder feed roller and the developing roller and are engaged with the driving force receiving gear 31, the intermediate gear 34 is also engaged with the driving force receiving gear 31, and the counter gear 36 is engaged with the intermediate gear 34, so that, when the driving force receiving member 4 receives the driving force, the developing roller, the powder feed roller, and the counter gear are all driven to rotate by the above-mentioned gear assembly 3. Generally, to prevent the carbon powder from caking in the casing 1, the developing cartridge 10 further comprises an agitating frame (not shown) rotatably mounted in the casing 1, and the gear assembly 3 further comprises an agitating frame gear 35 at one end of the agitating frame, the agitating frame gear 35 also meshing with the intermediate gear 34, thereby ensuring that the agitating frame is driven to rotate while the developing roller and the powder feeding roller rotate.

To improve the assembly efficiency of the developing cartridge assembly factory, it has been done to previously mount part of the components of the gear assembly 3 to the drive end cap 2 by the supplier of the casing 1, for example, the intermediate gear 34 and the counter gear 36 are previously mounted to the drive end cap 2. To two kinds of model development box that size and position that only count gear 36 are different, development box manufacture needs prepare the drive end cover 2 and the casing 1 of these two kinds of models simultaneously, the utility model provides a development box 10 then only need provide a casing 1 can.

As shown in fig. 1, the casing 1 has a first end surface 1a at the driving end F and a second end surface 1b at the conductive end E, the first end surface 1a and the second end surface 1b both face outward, the developing cartridge 10 further includes a plurality of positioning portions provided at the first end surface 1a, and when the driving end cap 2 mounted with the counting gear 36 is combined with the casing 1, the positioning portions are combined with the driving end cap 2, thereby positioning the counting gear 36; preferably, the first end 1a of the casing 1 is provided with two positioning portions 11/12, the two positioning portions 11/12 being respectively used for coupling with the driving end caps 2 of different models of developing cartridges.

The driving end cap 2 includes a main body 21, a through hole 22 provided on the main body 21, and a support rod 23, the driving force receiving member 4 is exposed through the through hole 22, and the counter gear 36 is supported by the support rod 23. The support rod 23 protrudes toward the housing 1, and includes a base 230 connected to the main body 21, a first deformation piece 231 and a second deformation piece 232 at a distal end of the base 230, and a stopper 234 provided at least one of the first deformation piece 231 and the second deformation piece 232, as shown in the drawing, a separation space 233 is formed between the first deformation piece 231 and the second deformation piece 232, and the stopper 234 is provided on the second deformation piece 232, so that the first deformation piece 231 and the second deformation piece 232 can be formed by cutting the separation space 233 at the distal end of the base 230 in an axial direction of the support rod 23. When the counter gear 36 is attached to the support rod 23, the first deforming piece 231 and the second deforming piece 232 deform toward the partition space 233 until the counter gear 36 passes through the stopper 234, and at this time, the first deforming piece 231 and the second deforming piece 232 are reset, and thus the counter gear 36 is restricted between the stopper 234 and the main body 21 by the stopper 234.

Further, the first deformation piece 231 and the second deformation piece 232 have different sizes along the axial direction of the support rod 23, and when viewed along the direction perpendicular to the axial direction of the support rod 23, the heights of the first deformation piece 231 and the second deformation piece 232 are different, for example, the first deformation piece 231 may be higher than the second deformation piece 232, or the second deformation piece 232 may be higher than the first deformation piece 231, so that the effect of increasing the installation speed of the counting gear 36 may be achieved, and when installing the counting gear 36, it is not necessary to ensure that the installation hole of the counting gear 36 is aligned with the first deformation piece 231 and the second deformation piece 232 at the same time, but it is only necessary to ensure that the higher deformation piece enters the installation hole of the counting gear 36.

Furthermore, the present embodiment adopts a higher mode of disposing the deformation sheet without the position-limiting portion 234, as shown in fig. 2, the position-limiting portion 234 is located at the end of the second deformation sheet 232, the first deformation sheet 231 is higher than the second deformation sheet 232, when the counting gear 36 is mounted, the higher first deformation sheet 231 enters the mounting hole of the counting gear 36 first, then, the counting gear 36 can be inclined relative to the axis of the support rod 23, so that the second deformation sheet 232 with the position-limiting portion 234 is more easily extruded by the counting gear 36 to deform, and finally, the counting gear 36 can be smoothly mounted; if the deformation sheet provided with the limiting portion 234 is set higher, the counting gear 36 will be combined with the limiting portion 234 first, and when the counting gear 36 needs to be combined with a lower deformation sheet, the counting gear 36 cannot be inclined relative to the axis of the support rod 23 due to the limitation of the limiting portion 234, so that the installation difficulty of the counting gear 36 is increased, and in contrast, in the higher mode in which the deformation sheet without the limiting portion 234 is set, the counting gear 36 has a greater degree of freedom in installation.

As further shown in fig. 2, facing the second deforming piece 232, the first deforming piece 231 has a holding surface 235, and when the drive cap 2 is mounted, the holding surface 235 is engaged with the positioning portion 11/12.

As shown in the drawings, the two positioning portions 11/12 may be referred to as a first positioning portion 11 and a second positioning portion 12, respectively, wherein the first positioning portion 11 is used for combining with the driving end cap/counter gear 36 of the first model developing cartridge, the second positioning portion 12 is used for combining with the driving end cap/counter gear 36 of the second model developing cartridge, the structures of the first positioning portion 11 and the second positioning portion 12 may be adjusted according to the structure of the driving end cap, preferably, the structures of the first positioning portion 11 and the second positioning portion 12 may be set to be the same, and the structure of the first positioning portion 11 will be described as an example hereinafter.

The first positioning portion 11 is provided as a cylindrical body extending outward from the first end face 1a, the cylindrical body having an opening for allowing the support rod 23 to enter the interior thereof, and includes a first stopper 11a and a second stopper 11b provided inside the cylindrical body, the first stopper 11a and the second stopper 11b occupying only a part of the space inside the cylindrical body, at least one of the first deforming piece 231 and the second deforming piece 232 enters the space inside the cylindrical body when the drive end cap 2 is mounted, and the holding surface 235 abuts against the first stopper 11a and the second stopper 11b in opposition. More preferably, a gap 11c is provided between the first stopper 11a and the second stopper 11b, and when the driving cap 2 is mounted, the stopper 234 enters the gap 11c, so that the support rod 23 can be stably supported at the first stopper 11.

As a simplified structure, the first stopper 11a and the second stopper 11b may be integrated, i.e., the gap 11c is eliminated, the first relatively higher deforming piece 231 faces the stopper, and the end of the second relatively lower deforming piece 232 abuts against the stopper 11a/11b, and also the stable support of the support bar 23 is ensured.

As described above with the embodiment in which the counter gear 36 is mounted on the driving cap 2, it is possible that the counter gear 36 may also be directly supported on the housing 1, at this time, the positioning portion 11/12 directly supports the counter gear 36 on the housing 1, and the shape of the positioning portion 11/12 may also be adaptively modified, for example, the positioning portion 11/12 is provided in the shape of a support shaft or a protrusion; unlike the above-described embodiment, the counter gear 36 is indirectly supported on the housing 1 through the driving end cap 2, but generally, by providing at least the first positioning portion 11 and the second positioning portion 12 on the distal end surface 1a of the housing 1, different types of developing cartridges can be assembled by combining the housing 1 with different driving end caps 2, and a developer manufacturer only needs to prepare one type of housing 1, which is beneficial to reducing the stock and improving the production efficiency.

Fig. 4 is a perspective view of the developing cartridge according to the present invention as viewed from the conductive end; fig. 5 is an exploded view of the conductive holder in the developing cartridge according to the present invention.

At the conductive end E, the developing cartridge 10 is further provided with a holder 5 and a conductive member 6 joined to the holder 5, wherein the holder 5 is nonconductive, and the conductive member 6 is conductive for contacting a power output member in the electrophotographic image forming apparatus to receive electric power and supply it to the developing roller and the powder feed roller, and in this embodiment, the holder 5 and the conductive member 6 are integrally formed and referred to as a conductive holder fixedly mounted on the second end face 1b of the casing.

As shown in fig. 4, the conductive bracket includes a first supporting portion 51 corresponding to the developing roller and a second supporting portion 52 corresponding to the powder feeding roller, the conductive member 6 includes a developing roller conductive member 61 for supplying power to the developing roller and a powder feeding roller conductive member 62 for supplying power to the powder feeding roller, and the conductive member 6 and the bracket 5 are integrated by a double injection molding method.

As shown in fig. 5, the bracket 5 has an inner side 5a facing the housing 1 and an outer side 5b away from the housing 1, the first support portion 51 and the second support portion 52 have the same structure, and the first conductive member 61 and the second conductive member 62 have the same structure, and the first support portion 51 is used for supporting the first conductive member 61 and the second support portion 52 is used for supporting the second conductive member 62, and the first support portion 51 and the first conductive member 61 are described as an example hereinafter.

The first support part 51 includes a first receiving groove 511, a second receiving groove 513, and a first connecting groove 512, the first connecting groove 512 communicates the first receiving groove 511 and the second receiving groove 513, the first receiving groove 511 is recessed from the holder inner side 5a toward the outer side 5b, and the first receiving groove 511 protrudes outward from the holder outer side 5b when viewed from the outside of the developing cartridge 10; the first conductive member 61 includes a first contact 611 electrically connected to the developing roller, a second contact 613 electrically connected to the electrophotographic image forming apparatus, and a first connecting member 612 connecting the first contact 611 and the second contact 613, the first contact 611 being received by the first receiving groove 511, the second contact 613 being received by the second receiving groove 513, and the first connecting member 612 being received by the first connecting groove 512.

The conductive bracket is produced by first injection-molding the bracket 5 having the first support part 51, and then injecting a conductive resin into the first connecting groove 512, along the first connecting groove 512, the conductive resin reaching the first receiving groove 511 to form the first contact 611, the conductive resin reaching the second receiving groove 513 to form the second contact 613, and the conductive resin in the first connecting groove 512 to form the first connecting member 612, so that the conductive member 6 is integrally formed with the bracket 5.

It is apparent that the conductive holder in which the conductive member 6 and the holder 5 are integrally formed is mounted only by one operation, not by mounting a plurality of times, and not only the number of parts of the developing cartridge 10 but also the number of assembling steps of the developing cartridge 10 are reduced.

Claims

1. A conductive bracket for being mounted on the developing cartridge and receiving power supplied to the developing cartridge from the outside, the conductive bracket including a bracket and a conductive member combined with each other, the bracket being fixedly mounted on the developing cartridge, the conductive member being electrically connected to an external contact, wherein the bracket and the conductive member are integrally formed by secondary injection molding.

2. The conductive holder according to claim 1, wherein the conductive holder includes a support portion corresponding to a component in the developing cartridge, the support portion includes a first receiving groove, a second receiving groove, and a connecting groove communicating the first receiving groove and the second receiving groove, and the conductive member is formed along the first receiving groove, the second receiving groove, and the connecting groove.

3. The conductive bracket of claim 2, wherein the bracket has an inner side facing the inside of the developing cartridge and an outer side facing away from the inside of the developing cartridge, and the first receiving groove is recessed from the inner side of the bracket toward the outer side.

4. The conductive holder according to claim 2, wherein the holder has an inner side facing inside the developing cartridge and an outer side remote from inside the developing cartridge, and the first receiving groove protrudes outward from the outer side of the holder when viewed from outside the developing cartridge.

5. The conductive holder according to claim 3 or 4, wherein the conductive member includes a first contact electrically connected to the inside of the developing cartridge, a second contact electrically connected to the outside, and a connecting member connecting the first contact and the second contact, the first contact being received by the first receiving groove, the second contact being received by the second receiving groove, the connecting member being received by the connecting groove.

6. A developing cartridge including a casing accommodating carbon powder, a developing roller and a powder feeding roller rotatably mounted in the casing, and a conductive holder mounted on a distal end face of the casing, the conductive holder including a holder fixedly mounted on the casing and a conductive member combined with the holder for receiving electric power from outside to be supplied to the developing roller and the powder feeding roller, characterized in that the holder and the conductive member are integrally formed by secondary injection molding.

7. A developing cartridge according to claim 6, wherein the conductive holder includes a supporting portion corresponding to the developing roller or the powder feeding roller, the supporting portion includes a first accommodating groove, a second accommodating groove, and a connecting groove communicating the first accommodating groove and the second accommodating groove, and the conductive member is formed along the first accommodating groove, the second accommodating groove, and the connecting groove.