A developing device

Abstract

The utility model provides a developing device, comprising a developing box and a drum frame, wherein the developing box is detachably mounted in the drum frame, the drum frame is assembled into an image forming device, a developing roller is rotatably mounted on the developing box, the developing box has a storage medium, the storage medium has an electrical contact surface, the image forming device has an electrical connector, an elastic unit is arranged on the developing box, a movable margin is arranged between the developing box and the drum frame, and the elastic force provided by the elastic unit acts on the inner wall of the drum frame perpendicular to the axial direction of the developing roller. The developing box of the utility model can float in the drum frame, so that the elastic unit is compressed, and a distance difference can be formed between the chip and the electrical connector, and the two can be separated from each other when disassembling or installing without sliding friction or interference.

Description

Technical Field

[0001] The utility model relates to a developing component, in particular to a developing processing device. Background Art

[0002] At present, image forming devices (such as laser printers) are usually equipped with a developing box and a drum frame inside. The developing box and the drum frame constitute a processing box. The processing box is detachably installed in the image forming device. The image forming device forms an electrostatic latent image on the photosensitive drum of the drum frame. The developer in the developing box adheres to the photosensitive drum to form an electrostatic latent image, making the electrostatic latent image visible.

[0003] like Figure 1 As shown, in order to realize the communication connection between the developer box 10 and the laser printer, a chip B electrically connected to the electrical connector A on the laser printer is generally provided on the existing developer box 10. Considering that the developer box 10 and the drum frame 20 need to meet the detachable requirements of the laser printer, the electrical contact surface of the chip B is usually electrically connected to the electrical connector A in the form of a conflict. When the developer box 10 and the drum frame 20 are disassembled, the chip B moves with the developer box 10 and can be separated by relative sliding from the electrical connector A.

[0004] However, in the above scheme, in order to ensure that the electrical contact surface of the chip and the electrical connector can be stably connected, there is a certain resistance force between the two, which makes the electrical connector and the electrical contact surface of the chip form a large friction when removing or installing the developer box. In the long run, it is easy to cause damage to the electrical contact surface of the chip and reduce the normal service life of the chip. At the same time, when installing the developer box, the chip is also easy to interfere with the electrical connector and affect the normal installation operation. Utility Model Content

[0005] The utility model aims to provide a developing processing device, in which the electrical contact surface of the chip on the developing component will not slide and rub against the electrical connector rigidly during the installation or removal of the developing component and the image forming device, thereby ensuring the normal service life of the chip.

[0006] In order to achieve the above purpose, the technical solution adopted is:

[0007] A developing processing device includes a developing box and a drum frame, wherein the developing box is detachably installed in the drum frame, the drum frame is assembled into an image forming device, a developing roller is rotatably installed on the developing box, the developing box has a storage medium, the storage medium has an electrical contact surface, the image forming device has an electrical connector, an elastic unit is arranged on the developing box, a movable margin is arranged between the developing box and the drum frame, and the elastic force provided by the elastic unit acts on the inner wall of the drum frame in an axis perpendicular to the developing roller.

[0008] Preferably, the developing box has a shell, the storage medium is a chip, and the chip is mounted on one side of the shell.

[0009] Preferably, the developing box is placed in a receiving groove of the drum frame with the notch facing upward, the developing roller is installed on the shell, the developing roller is parallel to the photosensitive drum of the drum frame and forms an abutting fit, and a chip holder for installing a chip is fixedly connected to a position of the shell corresponding to one end of the developing box, and when the drum frame is installed in the image forming device, the electrical contact surface of the chip facing away from the receiving groove abuts against the electrical connector to form an electrical connection, and the elastic force provided by the elastic unit acts on the bottom surface of the receiving groove in an axial direction perpendicular to the developing roller.

[0010] Preferably, the photosensitive drum is located on one side of the cavity of the accommodation groove, and a rib protruding toward the middle of the cavity is provided at the edge of the groove of the accommodation groove on the same side as the photosensitive drum, and one end of the developing roller arranged on the developing box is embedded in the cavity of the accommodation groove below the rib, and a lock is provided on the edge of the side of the accommodation groove opposite to the photosensitive drum, and the lock is in a locking position for limiting the upward displacement of the side of the developing box opposite to the developing roller or in a separation position for avoiding the developing box.

[0011] Preferably, the elastic unit is disposed on a side of the developing box opposite to the developing roller.

[0012] Preferably, the elasticity of the elastic unit is provided by a spring, a torsion spring, an elastic plate or elastic cotton.

[0013] Preferably, the elastic unit includes a connecting tube with its tube mouth facing the bottom surface of the receiving groove, a movable abutment is inserted in the tube cavity of the connecting tube and forms a guiding and limiting cooperation with the connecting tube in the direction of the tube core, the spring or torsion spring is connected between the inner tube bottom of the connecting tube and the movable abutment, the elastic force provided by the spring or torsion spring acts on the movable abutment along the direction of the tube core, and the movable abutment is arranged at one end of the connecting tube outside and abuts against the bottom surface of the receiving groove.

[0014] Preferably, a limiting groove is provided on the wall of the connecting tube, the length direction of the limiting groove is parallel to the core direction of the connecting tube and the length of the groove is smaller than the height of the connecting tube, and the movable abutment head is connected with a buckle which is built into the limiting groove and forms a guiding limiting cooperation with the limiting groove.

[0015] Preferably, at least two elastic units located on the same side of the developing box are arranged at the same height, and two adjacent movable abutments are connected by a connecting rod to form a connected structure.

[0016] In another optional implementation, an elastic plate is used, wherein the elastic plate is an elastic plate component with a bent plate body, and the elastic plate is formed by extending from the bottom surface of the shell.

[0017] Compared with the prior art, the technical effect of the utility model is as follows: by arranging an elastic unit on the developing box, the developing box can float in the groove depth direction of the receiving groove. When installing or disassembling the developing assembly, a force is applied to the developing box to compress the elastic unit, and the developing box moves into the receiving groove. A distance difference can be formed between the chip thereon and the electrical connector, and the two can be separated from each other during disassembly or installation without sliding friction or interference, thereby ensuring the normal service life of the chip and facilitating the smooth installation of the developing assembly and the image forming device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the state where a chip and an electrical connector conflict with each other in the prior art;

[0019] Figure 2 It is a schematic diagram of the assembly state of the developing box and the drum frame of the utility model;

[0020] Figure 3 This is a diagram of a drum stand;

[0021] Figure 4 is a schematic diagram of a developing box;

[0022] Figure 5 is a schematic diagram of a developing roller;

[0023] Figure 6 It is a schematic diagram of the bottom of the developing box;

[0024] Figure 7 is a schematic diagram of a first embodiment of an elastic unit;

[0025] Figure 8 is a schematic diagram of the connecting rod;

[0026] Fig. 9 is a schematic diagram of a second embodiment of an elastic unit;

[0027] Fig.10 for Figure 2 A magnified view of part N in FIG.

[0028] Fig.11 It is a schematic diagram of the cooperation between the lock buckle and the developing box;

[0029] Fig.12 A schematic diagram of another installation position of the elastic unit. DETAILED DESCRIPTION

[0030] The following will be combined with the attached Figure 1-11 The embodiments of the technical solution of this application are described in detail:

[0031] A developing processing device, wherein a developing box 10 is built into a receiving groove 21 on a drum frame 20 with a notch facing upward, a developing roller 11 is arranged on one side of the developing box 10, the developing roller 11 is parallel to the photosensitive drum 22 on the drum frame 20 and forms a resistance fit, a chip holder 121 is connected to a side cover 12 on the side of the developing box 10, when the drum frame 20 with the developing box 10 installed is assembled with an image forming device, an electrical contact surface of a chip B on the chip holder 121 on a side away from the receiving groove 21 abuts against an electrical connector A on the image forming device to form an electrical connection, a movable margin is arranged between the developing box 10 and the bottom surface of the receiving groove 21, an elastic unit 13 is arranged on the developing box 10, and the elastic force provided by the elastic unit 13 acts on the bottom surface of the receiving groove 21 in a direction perpendicular to the roller core of the developing roller 11.

[0032] In the above scheme, since there is a margin of movement between the developing box 10 and the bottom surface of the receiving groove 21, the developing box 10 can float in the depth direction of the receiving groove by providing the elastic unit 13 on the developing box 10. When installing or removing the developing assembly (i.e., the assembly formed by the developing box 10 and the drum frame 20), an external force is applied to the developing box 10 to compress the elastic unit 13, and the developing box 10 can move into the receiving groove 21, and the chip holder 121 moves together with the developing box, and a partition can be generated between the chip B thereon and the electrical connector A of the image forming device. When the developing assembly is removed or installed, the chip B and the electrical connector A are separated from each other without sliding friction or interference, thereby ensuring the normal service life of the chip B and facilitating the smooth installation of the developing assembly and the image forming device.

[0033] It should be noted that, in order to conveniently represent the installation method between the developing assembly and the image forming device, Figure 1 As shown, while applying external force to the developing box 10 to force it to move into the placement groove 21, the developing assembly is slid into or out of the corresponding installation position of the image forming device in the direction K. In the installation operation, after the developing assembly moves to the designated installation position, the external force applied to the developing box 10 is canceled, and under the elastic force of the elastic unit 13, the developing box 10 can naturally float to a high position, so that the chip B on the chip bracket 121 can contact the electrical connector A to form an electrical connection.

[0034] Combination Figure 2 , 3As shown in Figures 5 and 11, the photosensitive drum 22 is located at one side of the groove cavity of the accommodating groove 21, and a rib 211 protruding toward the middle of the groove cavity is provided along the groove opening of the accommodating groove 21 on the same side as the photosensitive drum 22. One end of the developing roller 11 arranged on the developing box 10 is embedded in the groove cavity below the rib 211 on the accommodating groove 21, and a lock buckle 24 is provided at the edge position of the side of the accommodating groove 21 opposite to the photosensitive drum 22. The lock buckle 21 is in a locking position for limiting the upward displacement of the side of the developing box 10 opposite to the developing roller 11 or in a separation position for avoiding the developing box 10.

[0035] In this solution, when installing the developing box 10 into the placement groove 21 on the drum frame 20, first, one end of the developing box 10 with the developing roller 11 is embedded into the groove cavity below the retaining edge 211 on the placement groove 21. The retaining edge 211 blocks the end of the developing box 10 where the developing roller 11 is located, and prevents the end from escaping from the placement groove 21. Then, the end of the developing box 10 relative to the developing roller 11 is pressed into the placement groove 21, and the lock buckle 21 is moved to a locking position that limits the upward displacement of the side of the developing box 10 opposite to the developing roller 11. The lock buckle 21 and the retaining edge 211 cooperate to prevent the developing box 10 from escaping from the placement groove 21. When the developing box 10 needs to be removed from the drum frame 20, the lock buckle 21 is moved to a separation position that avoids the developing box 10, and the limit of the end of the developing box 10 relative to the developing roller 11 is cancelled, and the developing box 10 can be further removed from the placement groove 21.

[0036] It should be noted that when locking the developer box 10, the lock buckle 24 can be placed on the upper end surface of the protrusion 14 on the developer box 10. The lock buckle 21 blocks the upper part of the protrusion 14, thereby preventing the developer box 10 from excessively floating outside the notch of the placement groove 21.

[0037] As a preferred solution, since under normal circumstances, the chip holder 121 is usually arranged at the end of the developer box 10 away from the developer roller 11, in order to ensure that the chip holder 121 has a larger floating space to avoid interference between the chip B and the electrical connector A, the elastic unit 13 is preferably arranged on the side of the developer box 10 opposite to the developer roller 11, that is, at the handle of the shell of the developer box 10.

[0038] Regarding the specific scheme setting of the elastic unit 13, the following two implementation modes are provided in this scheme:

[0039] First, combine Figure 1 , 4As shown in FIGS. 6 and 7, the elastic unit 10 includes a connecting tube 131 with a tube opening facing the bottom surface of the placement groove 21, a movable abutment 132 is inserted into the tube cavity of the connecting tube 131 and forms a guide limit fit with the connecting tube 131 in the tube core direction, a spring 133 is connected between the inner tube bottom of the connecting tube 131 and the movable abutment 132, the elastic force provided by the spring 133 acts on the movable abutment 132 along the tube core direction, and one end of the movable abutment 132 externally disposed on the connecting tube 131 abuts against the bottom surface of the placement groove 21. Applying an external force to the developing box 10 in the groove depth direction of the placement groove 21 can compress and deform the spring 133, and the movable abutment 132 can expand and contract in the connecting tube 131, so that the developing box 10 can elastically float in the groove depth direction of the placement groove 21.

[0040] Furthermore, in order to prevent the movable abutment 132 from completely separating from the connecting tube 131 and affecting normal use, a limiting groove 1311 is opened on the tube wall of the connecting tube 131. The groove length direction of the limiting groove 1311 is parallel to the tube core direction of the connecting tube 131 and the groove length is smaller than the tube height of the connecting tube 131. The movable abutment 132 is connected with a buckle 1321 which is built into the limiting groove 1311 and forms a guiding limiting cooperation with the limiting groove 1311.

[0041] As a preferred solution, at least two elastic units 13 are arranged at the same height on the same side of the developing box 10, and two adjacent movable abutments 132 are connected by a connecting rod 30 to form a conjoined structure. The setting of the connecting rod 30 can ensure that the two adjacent movable abutments 132 can be synchronously extended and retracted in the connecting tube 131, and while providing a stable supporting force, ensure that the developing box 10 can stably float relative to the drum frame 20.

[0042] Second, combine Fig. 9 As shown, the elastic unit is an elastic plate 40 with elasticity and a bent plate body, and the elastic plate 40 is formed by extending from the bottom surface of the shell of the developer box 10, preferably extending from the bottom of the handle. The elastic force of the elastic plate 40 acts on the bottom surface of the groove 21, so that the developer box 10 can float elastically in the groove depth direction of the groove 21.

[0043] In addition, combined Figure 1 , 10 As shown, in order to ensure that the developing roller 11 and the photosensitive drum 22 are in close contact, a pushing member 25 is provided at the edge of the receiving groove 21 on the side opposite to the photosensitive drum 22. The elastic force provided by the pushing member 25 acts on the force receiving portion 14 on the developing box 10 in a direction perpendicular to the roller core of the developing roller 11. The elastic force provided by the pushing member 25 can cause the developing roller 11 to be in close contact with the photosensitive drum 22.

[0044] There are many possible installation positions of the elastic unit 12, as long as the developer cartridge 10 can float in the depth direction of the placement groove of the drum frame 20. Fig.12 The elastic unit 12 may be mounted on a side of the developing box 10 that is close to the electrical connection surface of the chip (B), that is, on a side of the developing box 10 on which the chip (B) is mounted.

[0045] It should be noted that the forced pushing member 25 and the elastic unit 13 can be constructed with the same or similar structure as long as they can provide elastic force. The forced pushing member 25 belongs to the prior art and will not be elaborated on here.

Claims

1. A developing device, comprising a developing box (10) and a drum frame (20), wherein the developing box (10) is detachably mounted in the drum frame (20), the drum frame (20) is assembled into an image forming device, a developing roller (11) is rotatably mounted on the developing box (10), the developing box (10) has a storage medium, the storage medium has an electrical contact surface, and the image forming device has an electrical connector (A), characterized in that: The developing box (10) is provided with an elastic unit (13), and a movable margin is provided between the developing box (10) and the drum frame (20). The elastic force provided by the elastic unit (13) acts on the inner wall of the drum frame (20) in a direction perpendicular to the axial direction of the developing roller (11).

2. The developing device according to claim 1, characterized in that: The developing box (10) has a shell, and the storage medium is a chip, which is mounted on one side of the shell.

3. The developing device according to claim 2, characterized in that: The developing box (10) is placed in a receiving groove (21) of the drum frame (20) with the notch facing upwards, and the developing roller (11) is installed on the shell. The developing roller (11) is parallel to the photosensitive drum (22) of the drum frame (20) and forms a contact fit. A chip bracket (121) for installing a chip (B) is fixedly connected to a position of the shell corresponding to one end of the developing box (10). When the drum frame (20) is installed in the image forming device, the electrical contact surface of the chip (B) facing away from the receiving groove (21) abuts against the electrical connector (A) to form an electrical connection. The elastic force provided by the elastic unit (13) acts on the bottom surface of the receiving groove (21) along an axial direction perpendicular to the developing roller (11).

4. The developing device according to claim 3, characterized in that: The photosensitive drum (22) is located at one side of the groove cavity of the accommodating groove (21); a retaining edge (211) protruding toward the middle of the groove cavity is provided at the groove edge of the accommodating groove (21) on the same side as the photosensitive drum (22); one end of the developing roller (11) arranged on the developing box (10) is embedded in the groove cavity of the accommodating groove (21) below the retaining edge (211); a locking buckle (24) is provided at the edge of the side of the accommodating groove (21) opposite to the photosensitive drum (22); the locking buckle (24) is in a locking position for limiting the upward displacement of the side of the developing box (10) opposite to the developing roller (11) or in a separation position for avoiding the developing box (10).

5. The developing device according to claim 4, characterized in that: The elastic unit (13) is arranged on a side of the developing box (10) opposite to the developing roller (11); or, the elastic unit (13) is arranged on a side of the developing box (10) close to the storage medium.

6. The developing device according to any one of claims 3 to 5, characterized in that: The elasticity of the elastic unit is provided by a spring (133), a torsion spring, an elastic plate (40) or elastic cotton.

7. The developing device according to claim 6, characterized in that: The elastic unit (13) comprises a connecting tube (131) with its tube mouth facing the bottom surface of the accommodating groove (21); a movable abutment (132) is inserted into the tube cavity of the connecting tube (131) and forms a guiding and limiting fit with the connecting tube (131) in the direction of the tube core; a spring (133) or a torsion spring is connected between the inner tube bottom of the connecting tube (131) and the movable abutment (132); the elastic force provided by the spring (133) or the torsion spring acts on the movable abutment (132) along the direction of the tube core; one end of the movable abutment (132) is arranged outside the connecting tube (131) and abuts against the bottom surface of the accommodating groove (21).

8. The developing device according to claim 7, characterized in that: A limiting groove (1311) is provided on the wall of the connecting tube (131), the groove length direction of the limiting groove (1311) is parallel to the tube core direction of the connecting tube (131) and the groove length is smaller than the tube height of the connecting tube (131), and the movable abutment head (132) is connected with a buckle (1321) which is built into the limiting groove (1311) and forms a guide limiting fit with the limiting groove (1311).

9. The developing device according to claim 8, characterized in that: At least two elastic units (13) are arranged at the same height on the same side of the developing box (10), and two adjacent movable abutments (132) are connected by a connecting rod (30) to form a connected structure.

10. The developing device according to claim 6, characterized in that: The elastic plate (40) is a plate component with elasticity and a bent plate body, and the elastic plate (40) is formed by extending from the bottom surface of the shell.

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