CN219659968U - Static electricity removing device for laser printer - Google Patents

Abstract

The utility model provides a static electricity removing device for a laser printer, which comprises a pre-printing static electricity removing assembly, wherein one end of the pre-printing static electricity removing assembly is connected with a paper path paper pressing plate, and the other end of the pre-printing static electricity removing assembly is communicated with a paper inlet end of a transfer printing assembly and is used for removing static electricity from paper before transfer printing; the two ends of the post-printing electricity removing component are respectively communicated with the paper outlet end of the transfer printing component and the paper inlet end of the fixing component, and are used for removing static electricity from paper before fixing; the pre-printing electricity removing assembly and the post-printing electricity removing assembly are communicated with a grounding support on the laser printer. The pre-printing electricity removing assembly and the post-printing electricity removing assembly can effectively lead out redundant static charges on paper, avoid influencing transfer printing quality and image quality before fixation, and effectively improve printing quality.

Description

Static electricity removing device for laser printer

Technical Field

The utility model relates to the technical field of printing equipment, in particular to a static electricity removing device for a laser printer.

Background

With the development of the times, more and more office equipment is introduced into the market, and the office equipment has rich functions and simple operation and is welcomed by vast enterprises and public institutions. Meanwhile, in order to improve the working efficiency, the requirements of people on office equipment are higher and higher, and high-speed and high-quality laser printing equipment is promoted. But the increase in printing speed increases static electricity generated by friction between the paper and each member conveying the paper, and the static electricity generated by these friction seriously affects printing quality, including transfer quality and image quality before fixing.

The transfer printing process comprises the following steps: when the paper is about to extend into a gap between the transfer roller and the photosensitive drum, the transfer roller is started and electrified (the electric property of the transfer roller is opposite to that of the photosensitive drum), and the opposite electric charges on the photosensitive drum are attracted, so that the toner on the photosensitive drum falls onto the paper; the fixing process is as follows: after the transfer, the fixer performs heat fixing on the paper. Before the paper enters the transfer printing component and after the paper comes out of the transfer printing component and before the paper enters the fixing component, friction is generated between the paper and the paper feeding component so as to form static electricity, the static electricity generated by the paper can influence the attraction of the transfer printing roller to charges on the photosensitive drum, the transfer printing quality is further influenced, the static electricity generated by the paper can influence the distribution of toner on the paper, the image quality before fixing is further influenced, and the final printing quality is reduced.

Disclosure of Invention

The utility model aims to provide an electrostatic eliminating device for a laser printer, which aims to solve the problems in the background.

The technical scheme adopted by the utility model is as follows: a static-removing device for a laser printer, comprising:

one end of the pre-printing electricity removing component is connected with the paper path paper pressing board, and the other end of the pre-printing electricity removing component is communicated with the paper feeding end of the transfer printing component and is used for removing static electricity from paper before transfer printing;

the two ends of the post-printing electricity removing component are respectively communicated with the paper outlet end of the transfer printing component and the paper inlet end of the fixing component, and are used for removing static electricity from paper before fixing;

the pre-printing electricity removing assembly and the post-printing electricity removing assembly are communicated with a grounding support on the laser printer.

Further, the pre-printing electricity removing assembly comprises an electricity removing brush and a pre-printing electricity removing plate, one end of the electricity removing brush faces to a paper path, the other end of the electricity removing brush is communicated with the pre-printing electricity removing plate through the paper path paper pressing plate, and one end, far away from the paper path paper pressing plate, of the pre-printing electricity removing plate extends to a paper feeding end of the transfer printing assembly.

Further, the brush comprises a conductive foil, one side of the conductive foil is provided with conductive fibers, the other side of the conductive foil is provided with a conductive double faced adhesive tape, and the conductive double faced adhesive tape fixes the conductive foil on the bottom surface of the paper path paper pressing board.

Further, the pre-press electricity removing assembly further comprises an electricity removing brush bracket, wherein the electricity removing brush bracket is hinged to the bottom of the paper path paper pressing plate, and the electricity conducting foil is partially or completely covered and pressed.

Further, the two ends of the pre-press charge removing plate perpendicular to the paper conveying direction: one is communicated with the paper path paper pressing plate through a first electrode plate, and the other is communicated with the grounding support through a second electrode plate; the first electrode plate and the second electrode plate are clamped with the pre-printing electricity removing plate.

Further, the first electrode plate is communicated with the paper path paper pressing plate through a first connecting piece, one end of the first connecting piece is clamped with the first electrode plate, and the other end of the first connecting piece is abutted with the paper path paper pressing plate.

Further, the post-press electricity removing assembly comprises an electricity removing needle plate and a second electricity removing plate, the electricity removing needle plate is arranged at the paper outlet end of the transfer printing assembly and is communicated with the second electricity removing plate through a second connecting piece, the other end of the second electricity removing plate extends to the paper inlet end of the fixing assembly, and the electricity removing needle plate and/or the second electricity removing plate is communicated with the grounding support through a third connecting piece.

Further, the electricity removal needle plate is provided with a needle part and a mounting part, the tip end of the needle part faces the paper path, and the mounting part is used for connecting the laser printer, the second connecting piece and/or the third connecting piece.

Further, the first connecting piece is a conductive spring, and the second connecting piece and/or the third connecting piece is a conductive tension spring.

The utility model has the beneficial effects that: the pre-printing electricity removing assembly and the post-printing electricity removing assembly can effectively lead out redundant static charges on paper, avoid affecting transfer printing quality and image quality before fixation, and effectively improve printing quality. In addition, the utility model also sets the electric removing brush and the electric removing needle on different paths of the paper according to whether the paper has toner or not, thereby realizing the purpose of leading out redundant static charges, preventing the added structure from affecting the distribution state of the toner on the paper and having great production application significance.

Drawings

FIG. 1 is a state of use diagram of an embodiment of the present utility model;

FIG. 2 is a block diagram of an embodiment of the present utility model;

FIG. 3 is a bottom view of a brush and brush-holder assembly in an installed state in accordance with an embodiment of the present utility model;

fig. 4 is a front view and a left view of the brush according to the embodiment of the present utility model, from left to right;

FIG. 5 is a view showing an installation state of a pre-press charge removing plate at a first viewing angle in an embodiment of the present utility model;

FIG. 6 is a view showing an installation state of a pre-press charge removing plate at a second viewing angle in an embodiment of the present utility model;

FIG. 7 is a block diagram of a first conductive sheet and a second conductive sheet in an embodiment of the utility model;

FIG. 8 is a block diagram of a first connector, a second connector, and a third connector in an embodiment of the present utility model;

fig. 9 is a structural view of a static elimination needle board in the embodiment of the utility model;

fig. 10 is a block diagram of a post-press charge removing plate in an embodiment of the present utility model.

In the figure:

100. a pre-press charge removal assembly; 110. a brush removal; 111. a conductive foil; 112. a conductive fiber; 113. conductive double faced adhesive tape; 120. a pre-press charge removing plate; 121. a card interface; 130. a brush holder; 140. a first electrode sheet; 141. a through hole; 142. bending the sheet; 143. a limiting piece; 150. a second electrode sheet; 160. a first connector;

200. a post-press charge removal assembly; 210. a static removing needle plate; 211. a needle portion; 212. a mounting part; 220. a second charge removing plate; 230. a second connector; 240. a third connecting member;

300. paper path paper pressing board;

400. a transfer assembly;

500. and a fixing assembly.

Detailed Description

The following describes the technical solution of the embodiments of the present utility model in detail by means of the accompanying drawings, but the scope of protection of the present utility model is not limited to the embodiments.

It should be noted that the embodiment of the present utility model is applied to a laser printer, so that each component is mounted on the laser printer, and the mounting site and the paper conveying path need to be described by using the original components on the laser printer, where the original components include: the original components of the laser printers of various types are not consistent in distribution position, but the installation and the use of the embodiment of the utility model are not affected, so that only the text description is made on part of the original components, and the original components are not shown in the drawings. In addition, unless specifically stated otherwise, references to "connected" in this document include both "directly connected" and "indirectly connected".

Referring to fig. 1, a static electricity removing apparatus for a laser printer includes: the pre-press charge removal assembly 100 and the post-press charge removal assembly 200, both of which are in communication with a grounded support on the laser printer, to conduct excess electrostatic charge to ground. One end of the pre-printing electricity removing assembly 100 is connected with the paper path paper pressing plate 300, and the other end of the pre-printing electricity removing assembly is communicated with the paper feeding end of the transfer printing assembly 400 and is used for removing static electricity from paper before transfer printing; the two ends of the post-printing electricity removing assembly 200 are respectively communicated with the paper outlet end of the transfer printing assembly 400 and the paper inlet end of the fixing assembly 500, and are used for removing static electricity from paper before fixing. In the prior art, the paper pressing board 300 is only used for limiting paper, and the materials thereof are various, and in order to realize the basic functions of the embodiment of the present utility model, the paper pressing board 300 should be adaptively made of a material having an electrical conductivity, such as a metal material.

In the laser printer provided with the static eliminator in this embodiment, the paper feeding path during printing is shown as a solid curve in fig. 1, the paper will rub against multiple components (such as a paper feeding roller, various supporting components on the paper path, etc.) before entering the transfer printing component 400, so as to carry static charges, while the paper pressing board 300 is a component closer to the transfer printing component 400, where the pre-printing static eliminator 100 is arranged, so that the static charges on the paper entering the transfer printing component 400 can be reduced to a greater extent, and the influence on the transfer printing quality can be eliminated; after the transfer, the paper will continuously rub against the parts for transferring the paper before entering the fixing assembly 500, and further carry static charges, so that the two ends of the post-press static-removing assembly 200 are respectively abutted against the transfer assembly 400 and the fixing assembly 500, so that static charges can be continuously removed in the whole process of transferring the paper, and the distribution of toner on the paper before fixing is prevented from being affected by static charges, and further the image quality before fixing is affected.

Referring to fig. 2-4, the pre-press neutralization assembly 100 includes a neutralization brush 110 and a pre-press neutralization plate 120, wherein one end of the neutralization brush 110 faces the paper path, and the other end of the neutralization brush is conducted with the pre-press neutralization plate 120 through the paper path paper pressing plate 300, and one end of the pre-press neutralization plate 120 far from the paper path paper pressing plate 300 extends to the paper feeding end of the transfer printing assembly 400. The pre-transfer brush 110 is used for primarily removing static electricity from paper, and the pre-transfer plate 120 is used for assisting in removing static electricity from paper, so that the electrostatic charge rate on paper is improved. In particular, both may be configured to connect to and conduct with the ground support.

Referring to fig. 3, in some possible embodiments, the brush 110 includes a conductive foil 111, one side of the conductive foil 111 is provided with conductive fibers 112, and the other side is provided with a conductive double sided tape 113, and the conductive double sided tape 113 fixes the conductive foil 111 to the bottom surface of the paper board 300. The material of the conductive foil 111 is not specifically limited, and may be pure metal (such as aluminum foil) or other solid materials with conductive capability, and the conductive fibers 112 are arranged in multiple groups to increase the contact area with paper and improve the efficiency of guiding out static charges.

Because the brush 110 is in contact with the paper and is easy to drop in the working process, the brush holder 130 is further disposed at the bottom of the paper pressing board 300 in the embodiment, and the brush holder 130 is hinged to the bottom of the paper pressing board 300 to partially or completely cover the conductive foil 111, so as to improve the connection stability between the brush 110 and the paper pressing board 300. When the brush-removing holder 130 is installed, a torsion spring can be sleeved on the hinge shaft, and two ends of the torsion spring are respectively abutted against the bottom surface of the paper path paper pressing plate 300 and the brush-removing holder 130, so that the brush-removing holder 130 is used for limiting the brush-removing holder 130, and when no force is applied, the brush-removing holder 130 can fasten the conductive foil 111 on the bottom surface of the paper path paper pressing plate 300. The shape and structure of the torsion spring are conventional, and are not specifically shown in the drawings.

Referring to fig. 5 to 8, the above-described pre-press charge removing plate 120 has two ends perpendicular to the sheet conveying direction: one is conducted with the paper path paper pressing plate 300 through the first electrode plate 140, and the other is conducted with the grounding support through the second electrode plate 150; the first electrode pad 140 and the second electrode pad 150 are both clamped with the pre-print charge removing plate 120. In practice, the distance between the first electrode pad 140 and the second electrode pad 150 should be not smaller than the width of the paper, and in addition, the three-dimensional shapes of the first electrode pad 140 and the second electrode pad 150 shown in fig. 7 are only shown as examples, and in practical implementation, the three-dimensional shapes should be adapted to the structural shapes of the original components of the laser printer, so that the static electricity removing device provided in this embodiment is installed on the premise that the composition and the assembly position of the original components of the laser printer are not changed. The first electrode sheet 140 and the second electrode sheet 150 may be screwed with the original components of the laser printer, and the through holes 141 for installing nuts may be formed in the above structure adaptively.

During printing, paper passes through the pre-printing electricity removing plate 120, and the arrangement of the first electrode plate 140 and the second electrode plate 150 not only can realize the export of static charges on the electricity removing brush 110 and the pre-printing electricity removing plate 120 to the grounding bracket, but also can not block the transmission of the paper.

For easy assembly, disassembly and maintenance, the first electrode plate 140 and the second electrode plate 150 can be clamped with the pre-printing electricity removing plate 120, the bending plates 142 are arranged at the ends of the first electrode plate 140 and the second electrode plate 150, which are connected with the pre-printing electricity removing plate 120, the pre-printing electricity removing plate 120 is provided with a clamping interface 121 which is matched with the bending plates 142, and the bending plates 142 penetrate through the clamping interface 121 to fix the pre-printing electricity removing plate 120.

In actual operation, if a paper jam occurs, the paper path pressing board 300 needs to be lifted to dredge the paper path, and for convenient use, this embodiment is set as follows: the first electrode sheet 140 is conducted with the paper pressing board 300 through the first connecting piece 160, one end of the first connecting piece 160 is clamped with the first electrode sheet 140, and the other end of the first connecting piece 160 is abutted with the paper pressing board 300. The first connecting piece 160 is a conductive spring, a setting mode convenient for connection is shown in fig. 8, the first connecting piece 160 is a conductive spring, one end of the conductive spring is bent into a shape like a Chinese character 'ji', two limiting pieces 143 are arranged on the first electrode piece 140, the two limiting pieces 143 are oppositely arranged and form a limiting space with the first electrode piece 140, in the limiting space, both the limiting pieces 143 and the first electrode piece 140 are in an acute angle of not more than 45 degrees, and when the paper pressing board 300 is pressed at the other end of the conductive spring, the end of the shape like the Chinese character 'ji' of the conductive spring stretches into the limiting space.

Since the toner exists on the paper after the transfer printing and the distribution state of the toner cannot be changed, the post-printing electricity removing assembly 200 cannot continue to use the electricity removing brush, so referring to fig. 1, 2, 9 and 10, the post-printing electricity removing assembly 200 is configured as an electricity removing needle plate 210 and a second electricity removing plate 220, the electricity removing needle plate 210 is disposed at the paper outlet end of the transfer printing assembly 400 and is conducted with the second electricity removing plate 220 through the second connecting piece 230, and the other end of the second electricity removing plate 220 extends to the paper inlet end of the fixing assembly 500, and the electricity removing needle plate 210 and/or the second electricity removing plate 220 is conducted with the grounding support through the third connecting piece 240. In practice, the extra static charge on the paper can be attracted by utilizing the tip effect of the static eliminating needle plate 210, and the contact with the paper is not needed, so that friction or vibration can not be generated due to the contact, and the distribution of the toner is not affected. The second connecting piece 230 and the third connecting piece 240 can be conductive tension springs, so that materials are conveniently available on one hand, and the second connecting piece and the third connecting piece have certain elasticity and are convenient to assemble and disassemble on the other hand.

Fig. 9 exemplarily shows a shape and a structure of a charge removing needle plate 210, wherein a needle portion 211 and a mounting portion 211 are provided on the charge removing needle plate 210, and a tip of the needle portion 211 faces a paper path; the shape and position of the mounting portion 211 may be set according to the shape and structure of the original components of the laser printer, specifically may be a hook shape, a hanging ring shape, a slot shape, a clamping block shape, or the like, and is disposed at a suitable position of the charge removing needle plate 210 for connecting the laser printer, the second connecting member 230, and/or the third connecting member 240.

The pre-printing electricity removing assembly 100 and the post-printing electricity removing assembly 200 in the embodiment of the utility model can effectively lead out redundant static charges on paper, avoid influencing the transfer printing quality and the image quality before fixation, and effectively improve the printing quality. According to the embodiment of the utility model, the electric charge removing brush 110 and the electric charge removing needle are respectively arranged on different paths through which the paper passes according to whether the toner exists on the paper, so that the extra structure can be prevented from influencing the distribution state of the toner on the paper while the extra static charge is led out, and the method has great production application significance.

The foregoing is a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model and are intended to be comprehended within the scope of the present utility model.

Claims (9)

1. An electrostatic discharge device for a laser printer, comprising:

one end of the pre-printing electricity removing component is connected with the paper path paper pressing board, and the other end of the pre-printing electricity removing component is communicated with the paper feeding end of the transfer printing component and is used for removing static electricity from paper before transfer printing;

the two ends of the post-printing electricity removing component are respectively communicated with the paper outlet end of the transfer printing component and the paper inlet end of the fixing component, and are used for removing static electricity from paper before fixing;

the pre-printing electricity removing assembly and the post-printing electricity removing assembly are communicated with a grounding support on the laser printer.

2. The static eliminator for a laser printer according to claim 1, wherein the pre-press static eliminator comprises a static eliminator and a pre-press static eliminator, one end of the static eliminator faces the paper path, the other end of the static eliminator is communicated with the pre-press static eliminator through the paper path paper pressing plate, and one end of the pre-press static eliminator away from the paper path paper pressing plate extends to the paper feeding end of the transfer printing assembly.

3. The static-removing device for a laser printer according to claim 2, wherein the static-removing brush comprises a conductive foil, one side of the conductive foil is provided with conductive fibers, and the other side of the conductive foil is provided with a conductive double sided tape, and the conductive double sided tape fixes the conductive foil on the bottom surface of the paper path paper pressing board.

4. A static-removing device for a laser printer according to claim 3, wherein the pre-press static-removing assembly further comprises a static-removing brush holder hinged to the bottom of the paper-path pressing board, and partially or entirely covering the conductive foil.

5. A static-removing device for a laser printer according to any one of claims 2 to 4, wherein the pre-press static-removing plate has two ends perpendicular to the sheet conveying direction: one is communicated with the paper path paper pressing plate through a first electrode plate, and the other is communicated with the grounding support through a second electrode plate; the first electrode plate and the second electrode plate are clamped with the pre-printing electricity removing plate.

6. The static-removing device for laser printer according to claim 5, wherein the first electrode sheet is connected to the paper-path paper-pressing plate through a first connecting piece, one end of the first connecting piece is clamped with the first electrode sheet, and the other end of the first connecting piece is abutted to the paper-path paper-pressing plate.

7. The static-removing device for a laser printer according to claim 6, wherein the post-press static-removing assembly comprises a static-removing plate and a second static-removing plate, the static-removing plate is arranged at the paper outlet end of the transfer assembly and is communicated with the second static-removing plate through a second connecting piece, the other end of the second static-removing plate extends to the paper inlet end of the fixing assembly, and the static-removing plate and/or the second static-removing plate are communicated with the grounding support through a third connecting piece.

8. The static-removing device for a laser printer according to claim 7, wherein the static-removing needle plate is provided with a needle portion and a mounting portion, the tip of the needle portion faces the paper path, and the mounting portion is used for connecting the laser printer, the second connecting member and/or the third connecting member.

9. The static-removing device for a laser printer according to claim 8, wherein the first connecting member is a conductive spring, and the second connecting member and/or the third connecting member is a conductive tension spring.