CN217655420U - Conductive structure of charging roller, imaging device and printer - Google Patents

Abstract

The utility model relates to a conductive structure of a charging roller, which comprises a charging roller arranged close to a waste powder bin, a conductive sheet arranged on the end wall of the waste powder bin, a conductive bracket and an elastic piece; the support is sleeved outside the charging roller, and the elastic piece is arranged between the conducting strip and the support in an elastically deformable manner. This conductive structure of roller charges realizes conducting strip and the indirect electricity of roller that charges through elastic component, support and is connected, and wherein the elastic action of elastic component can guarantee reliability, the stability of electricity connection, has improved conducting strip and the roller that charges and has appeared interrupting the circumstances of circular telegram because of contact failure, effectively improves picture quality stability. The utility model discloses still relate to an image device, including useless powder storehouse, fixed setting is close to the sensitization drum that useless powder storehouse tip set up at the outer end cover of useless powder storehouse tip to and aforementioned conductive structure of the roller that charges, the roller that charges contacts with the sensitization drum. The utility model discloses still relate to a printer, including aforementioned image device.

Description

Conductive structure of charging roller, imaging device and printer

Technical Field

The utility model relates to a conductive structure of roller charges still relates to the image device who uses this roller conductive structure charges to and printer.

Background

The selenium drum is a core imaging component in the laser printer, and the quality of the printing quality of the laser printer is determined by the selenium drum to a great extent. The toner cartridge mainly comprises a toner bin, a photosensitive drum, a charging roller, a magnetic roller, a scraper and a plurality of rotating gears. When the laser printer is used for printing, the charging roller uniformly charges the surface of the photosensitive drum to ensure that the surface of the photosensitive drum obtains a certain electric potential, then the photosensitive drum is exposed by a laser beam carrying image and text image information to form an electrostatic latent image on the surface of the photosensitive drum, the latent image is converted into a visible toner image through development of the magnetic roller, the toner is transferred onto common paper under the action of an electric field of a transfer electrode when passing through a transfer area, and finally the toner is fixed through a preheating plate and a high-temperature hot roller so as to fuse characters and images on the paper. After the image-text information is printed, the cleaning roller removes the toner which is not transferred, the electricity-eliminating lamp removes the residual charge on the photosensitive drum, and the photosensitive drum is thoroughly cleaned by the cleaning paper system, so that a new working cycle can be started.

Therefore, the charging process of the visible photosensitive drum is an important working link of the laser printer, and the charging stability of the charging roller directly influences the charging stability of the photosensitive drum, so that the printing effect is directly influenced. Conducting strip fixes on the end cover corresponding to the position of the roller that charges among the prior art, and the structure is its and the roller direct contact that charges of shell fragment formula structure, because the roller that charges need rotate work, need paint conductive grease on the shell fragment, and the roller that charges continuously rotates and electrically conducts the unstable just easy emergence of shell fragment contact and rotates the abnormal sound problem. The conducting strip can not be effectively fixed in the prior art, the contact stability of the conducting strip and the charging roller is poor, the charging efficiency of the photosensitive drum is further influenced, and the problem of periodical horizontal lines of the portrait is easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem that provides a fixed knot through changing the roller conducting strip that charges constructs to above-mentioned prior art to improve the conducting structure of conducting strip and the roller that charges contact stability, conductive reliability's the roller that charges.

The utility model discloses the second technical problem that will solve provides an use aforementioned conductive structure's of roller that charges image device to above-mentioned prior art.

The utility model aims to solve the third technical problem that it provides an effectively improve the printer of picture quality stability to above-mentioned prior art.

The utility model provides a technical scheme that above-mentioned first technical problem adopted does: the utility model provides a conductive structure of roller charges, sets up the roller that charges including being close to useless powder storehouse, sets up the conducting strip on the end wall in useless powder storehouse, its characterized in that: the conductive bracket and the elastic piece are also included; the support is sleeved outside the charging roller, and the elastic piece is arranged between the conducting strip and the support in an elastically deformable manner.

In order to conveniently realize the installation of the conducting strips, at least two fixing columns are arranged on the end wall of the waste powder bin, and through holes for placing the fixing columns are formed in the conducting strips corresponding to the fixing columns.

In order to ensure the firmness of the conducting strip on the end wall of the waste powder bin, two clamping pieces which are oppositely pressed to the fixing column are arranged on the conducting strip, and the two clamping pieces are integrally connected to the edge of the through hole.

Preferably, the end wall of the waste powder bin is provided with a mounting groove, the support is arranged in the mounting groove in a limiting mode, the conductive sheet is provided with a connecting pin in a bending mode towards the bottom of the mounting groove, and the elastic piece is arranged between the connecting pin and the support.

In order to ensure the stability of the relative connection relation of all the parts, a first positioning column is arranged at the bottom of the support, and a second positioning column is arranged on the bottom surface of the mounting groove; the conducting strip is provided with two connecting pins which are respectively positioned at two sides of the second positioning column; the elastic piece is a spring, one end of the spring is sleeved outside the first positioning column, and the other end of the spring is sleeved outside the second positioning column.

In order to improve the electric contact stability of the support and the elastic part, clamping grooves for clamping the side edges of the mounting groove are formed in the two side walls of the support.

Conveniently charge the roller installation ground, the support has the caulking groove of upwards opening, the internal surface of caulking groove and the outer peripheral face phase-match of roller end portion that charges.

In order to conveniently realize the electric connection between the conducting strip and an external charging terminal, an end cover is arranged outside the end part of the waste powder bin, and an opening is formed in the end cover;

the conductive sheet has an electrical connection portion protruding into the opening to be electrically connected with an external charging terminal.

The utility model provides a technical scheme that above-mentioned second technical problem adopted does: an image forming apparatus characterized by: including useless powder storehouse, fixed setting is close to the sensitization drum that useless powder storehouse tip set up at the outer end cover in useless powder storehouse tip to and as aforesaid charge the electrically conductive structure of roller, charge the roller and contact with the sensitization drum.

The utility model provides a technical scheme that above-mentioned third technical problem adopted does: a printer, characterized by: including an imaging device as previously described.

Compared with the prior art, the utility model has the advantages of: the utility model provides a conductive structure of roller charges, change the connected mode of conducting strip and the roller direct contact that charges among the prior art, but utilize the stability and the conductibility of supporting structure, the conductibility of elastic component is deuterogamied, and then through the elastic component, the support realizes that the conducting strip is connected with the indirect electricity of the roller that charges, wherein the elastic action of elastic component can guarantee the reliability of electricity connection, the conducting strip has been improved and the roller that charges appears being interrupted the circular telegram because of contact failure the condition, the stability that the roller that charges has been guaranteed, prevent to take place discontinuity contact problem, effectively improve the image quality stability.

Drawings

Fig. 1 is a perspective view of the conductive structure of the charging roller in the embodiment of the present invention.

Fig. 2 is another view of fig. 1.

Fig. 3 is an internal structure diagram of the conductive structure of the charging roller in the embodiment of the present invention.

Fig. 4 is an exploded perspective view of the conductive structure of the charging roller according to the embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 4, the conductive structure of the charging roller in the present embodiment includes a charging roller 2 disposed near the waste toner receptacle 1, a conductive sheet 3 disposed on an end wall of the waste toner receptacle 1, a conductive bracket 4, and an elastic member 5. The materials of the bracket 4 and the elastic piece 5 are selected according to the requirement, and the materials capable of being electrified can be selected. The bracket 4 is sleeved outside the charging roller 2, and in the embodiment, the bracket 4 is provided with an embedding groove 43 which is opened upwards, so that the end part of the charging roller 2 can be installed in the embedding groove 43 through the opening, and the inner surface of the embedding groove 43 is matched with the outer peripheral surface of the end part of the charging roller 2. During operation, the charging roller 2 rotates relative to the support 4, and in the rotating process, the charging roller 2 is always in contact with the inner surface of the support 4. The elastic member 5 is elastically deformably disposed between the conductive plate 3 and the support 4.

In order to facilitate the installation of the conductive sheet 3, at least two fixing posts 11 are arranged on the end wall of the waste powder bin 1, and through holes 31 for placing the fixing posts 11 are formed in the conductive sheet 3 corresponding to the fixing posts 11. In this embodiment, three fixing posts 11 are disposed on the end wall of the waste powder bin 1, and three through holes 31 are correspondingly formed in the conductive sheet 3, so that during installation, the through holes 31 in the conductive sheet 3 are aligned with the fixing posts 11, and the conductive sheet 3 is further installed outside the end portion of the waste powder bin 1 in a limiting manner. In order to ensure the firmness of the installation of the conductive plate 3 on the end wall of the waste powder bin 1, two clamping sheets 32 which are oppositely pressed against the fixed columns 11 are further arranged on the conductive plate 3 corresponding to a part of the fixed columns 11, and the two clamping sheets 32 are integrally connected at the edge of the through hole 31 for the sake of simplicity of structure. Through-hole 31 on the conducting strip 3 sets up to the square hole, cuts apart into two lamellar bodies with the lamellar body part that the square hole corresponds, leans out the bending sheet body and then forms aforementioned chucking piece 32, so chucking piece 32 body coupling is on conducting strip 3, and structural stability is better.

Be equipped with mounting groove 12 on the end wall in useless powder storehouse 1, this mounting groove 12 upwards opening realizes the electrically conductive connection between conducting strip 3, elastic component 5, the support 4 through mounting groove 12, and its structural stability is better. Specifically, the spacing setting of support 4 is in the upper portion of mounting groove 12, be equipped with the draw-in groove 42 that supplies mounting groove 12 side card to go into on two lateral walls of support 4 in this embodiment, during the installation, make the draw-in groove 42 of support 4 both sides aim at the both sides of mounting groove 12, from the opening on mounting groove 12 upper portion support 4 of pushing down, and then realize the spacing installation of support 4 in mounting groove 12, for the position stability in useless powder storehouse 1 after the support 4 installation, can not follow the rotation of roller 2 that charges and have big displacement, so also can improve the stability of charging.

The conducting strip 3 is provided with a connecting pin 33 bending towards the bottom of the mounting groove 12, and the elastic piece 5 is arranged between the connecting pin 33 and the bracket 4. The elastic member 5 has an elastic force in the direction of the connecting leg 33 and the support 4, so that the connecting leg 33, the elastic member 5 and the support 4 are always kept in a close contact state, in order to ensure the stability of the electrical connection relationship of the components, the bottom of the support 4 is provided with a first positioning column 41, and the bottom surface of the mounting groove 12 is provided with a second positioning column 121. The conductive plate 3 has two connecting pins 33, and the two connecting pins 33 are respectively located at two sides of the second positioning column 121. The elastic member 5 is a spring, one end of the spring is sleeved outside the first positioning post 41, and the other end of the spring is sleeved outside the second positioning post 121. The first positioning column 41 and the second positioning column 121 limit the spring, so that the stability of electric conduction among the conducting plate 3, the bracket 4 and the spring is ensured.

To realize the circular telegram, conducting strip 3 need be connected with the charging terminal electricity on the printer, for the convenience realize that conducting strip 3 is connected with outside charging terminal electricity, still is provided with end cover 6 outside the tip in useless powder storehouse 1, has seted up trompil 61 on the end cover 6. The conductive sheet 3 has an electrical connection portion 34 protruding into the opening 61 to be electrically connected with an external charging terminal, so that the electrical connection portion 34 can be electrically connected with the external charging terminal, and indirect charging of the conductive sheet 3 to the charging roller 2 is realized based on the connection structure of the conductive sheet 3, the elastic member 5 and the bracket 4 and the rotation connection relationship of the bracket 4 and the charging roller 2.

This conductive structure of roller charges, the connected mode of conducting strip 3 with charge roller 2 direct contact among the prior art has been changed, but utilize the stability and the conductibility of support 4 structure, the conductibility of deuterogamy elastic component 5, and then through elastic component 5, support 4 realizes conducting strip 3 and charge roller 2's indirect electricity and connects, wherein the elasticity effect of elastic component 5 can guarantee the reliability of electricity connection, the condition of circular telegram is interrupted because of contact failure appears in conducting strip 3 and the roller 2 that charges, the stability that the roller 2 charges has been guaranteed, and the conductive structure of the roller that should charge need not to paint conductive grease, can effectively prevent to charge 2 instability of live process in the rotation of roller, prevent to take place intermittent contact problem, effectively improve the picture quality stability. In addition, the connection pin 33 portion of the conductive sheet 3 for contact connection with the elastic member 5 adopts a cantilever structure with a bending structure, so that the contact end surface of the connection pin 33 is effectively supported, and pressure deformation is prevented.

The utility model discloses still relate to an image device, including useless powder storehouse 1, fixed setting is close to the sensitization drum 7 that useless powder storehouse 1 tip set up at the outer end cover 6 in useless powder storehouse 1 tip to and like the aforesaid conductive structure of the roller that charges, charge roller 2 and sensitization drum 7 contact, so charge roller 2 and sensitization drum 7 direct extrusion contact, and then charged for sensitization drum 7.

The utility model discloses still relate to a printer, include like aforementioned image device, to the charge stability of roller 2 strong in this printer, guaranteed the stability of charging to sensitization drum 7, avoided taking place to portrait periodic transverse line's problem.

Directional terms such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the present invention, but these terms are used herein for convenience of description only and are determined based on example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Claims (10)

1. The utility model provides a conductive structure of roller charges, sets up roller (2) of charging including being close to useless powder storehouse (1), sets up conducting strip (3) on the end wall in useless powder storehouse (1), its characterized in that: the device also comprises a conductive bracket (4) and an elastic piece (5); the support (4) is sleeved outside the charging roller (2), and the elastic piece (5) is arranged between the conducting strip (3) and the support (4) in an elastically deformable manner.

2. The conductive structure of the charging roller as set forth in claim 1, wherein: the end wall of the waste powder bin (1) is provided with at least two fixing columns (11), and through holes (31) for the fixing columns (11) to be placed in are formed in the conducting strips (3) corresponding to the fixing columns (11).

3. The conductive structure of the charging roller according to claim 2, characterized in that: the conducting strip (3) is provided with two clamping sheets (32) which are oppositely pressed to the fixing column (11), and the two clamping sheets (32) are integrally connected to the edge of the through hole (31).

4. The conductive structure of the charging roller as set forth in any one of claims 1 to 3, wherein: be equipped with mounting groove (12) on the end wall in useless powder storehouse (1), support (4) are spacing to be set up in mounting groove (12), conducting strip (3) are gone up and are equipped with in mounting groove (12) bottom to buckling and connect foot (33), elastic component (5) set up between connecting foot (33) and support (4).

5. The conductive structure of the charging roller as set forth in claim 4, wherein: a first positioning column (41) is arranged at the bottom of the support (4), and a second positioning column (121) is arranged on the bottom surface of the mounting groove (12); the conducting strip (3) is provided with two connecting pins (33), and the two connecting pins (33) are respectively positioned on two sides of the second positioning column (121); the elastic piece (5) is a spring, one end of the spring is sleeved outside the first positioning column (41), and the other end of the spring is sleeved outside the second positioning column (121).

6. The conductive structure of the charging roller as set forth in claim 4, wherein: and clamping grooves (42) for clamping the side edges of the mounting grooves (12) are formed in the two side walls of the support (4).

7. The conductive structure of the charging roller as set forth in any one of claims 1 to 3, wherein: the support (4) is provided with an upwards-opened caulking groove (43), and the inner surface of the caulking groove (43) is matched with the outer peripheral surface of the end part of the charging roller (2).

8. The conductive structure of the charging roller as set forth in any one of claims 1 to 3, wherein: an end cover (6) is further arranged outside the end part of the waste powder bin (1), and a hole (61) is formed in the end cover (6);

the conductive sheet (3) has an electrical connection portion (34) protruding into the opening (61) to be electrically connected with an external charging terminal.

9. An image forming apparatus characterized by: comprises a waste powder bin (1), an end cover (6) fixedly arranged outside the end part of the waste powder bin (1), a photosensitive drum (7) arranged close to the waste powder bin (1), and the conductive structure of the charging roller according to any one of claims 1 to 8, wherein the charging roller (2) is in contact with the photosensitive drum (7).

10. A printer, characterized by: comprising an imaging device according to claim 9.

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