CN217279266U

CN217279266U - Carbon powder bin sealing structure, imaging device and printer

Info

Publication number: CN217279266U
Application number: CN202123345707.0U
Authority: CN
Inventors: 杨浩
Original assignee: Ningbo Deli Kebei Technology Co Ltd
Current assignee: Ningbo Deli Kebei Technology Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-08-23
Anticipated expiration: 2031-12-28

Abstract

The utility model relates to a carbon dust storehouse seal structure includes the carbon dust storehouse, the powder outlet has been seted up to the lower part in carbon dust storehouse, the lateral wall at powder outlet both ends have with developer roll assorted bearing surface, be provided with the doctor-bar of pressure on the developer roll surface on the wall at powder outlet upper edge, be equipped with first sealing member on the bearing surface of powder outlet both ends lateral wall, be equipped with the second sealing member on the medial surface of powder outlet both ends lateral wall, the doctor-bar clamp is established between two first sealing members and is pressed on the second sealing member, the sealing surface of second sealing member is higher than the sealed face of first sealing member. The sealing structure of the carbon powder bin effectively avoids the situation of powder leakage between the scraping blade and the first sealing element. The utility model discloses aforementioned toner hopper seal structure image device and printer effectively prevent to leak the powder, have improved the effect of printing.

Description

Carbon powder bin sealing structure, imaging device and printer

Technical Field

The utility model relates to a printer technical field, concretely relates to carbon dust storehouse seal structure still relates to imaging device and printer of using this carbon dust storehouse seal structure.

Background

The imaging device is a core component in the printer, and the imaging device in the laser printer mainly comprises a toner bin, a photosensitive drum, a charging roller and a developing roller. 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, and then the photosensitive drum is exposed by a laser beam carrying image-text image information to form an electrostatic latent image on the surface of the photosensitive drum. The ink powder in the ink powder bin is adhered to the developing roller uniformly under the action of the control sheet, the photosensitive drum is developed by the developing roller, the latent image is converted into a visible ink powder image, when the latent image passes through a transfer area, the ink powder is transferred to the common paper under the action of an electric field of a transfer electrode, and finally the ink powder is fixed by 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 ink powder which is not transferred on the photosensitive drum, the electricity-eliminating lamp removes the residual charge on the photosensitive drum, and the photosensitive drum is thoroughly cleaned by the cleaning system, so that a new working cycle can be started.

In order to prevent the situation that the leakage of the toner in the toner bin occurs, sealing sponge is arranged between the positions of two ends of a toner outlet of the toner bin and the developing roller, the sealing sponge is easy to wrinkle, gaps are difficult to avoid, the function of preventing the leakage of the toner is poor, and the situation that the thickness of a carbon powder layer on the surface of the developing roller is uneven and the image is abnormal due to the fact that the sealing sponge is too large in hardness and large in contact pressure with a control sheet exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem that a can strengthen the leakproofness to above-mentioned prior art provides one kind, prevents that the toner hopper's play powder mouth both ends from taking place the carbon dust storehouse seal structure of leaking the powder.

The utility model aims to solve the second technical problem that provide one kind can effectively prevent to leak the powder to above-mentioned prior art, guarantee to print the image device of effect.

The third technical problem to be solved in the present invention is to provide a printer using the above-mentioned imaging device.

The utility model provides a technical scheme that above-mentioned first technical problem adopted is: the utility model provides a carbon dust storehouse seal structure, includes the carbon dust storehouse, the powder outlet has been seted up to the lower part in carbon dust storehouse, the lateral wall at powder outlet both ends have with developer roll assorted holding surface, be provided with the doctor-bar of pressure on the developer roll surface on the wall of powder outlet upper edge, its characterized in that: be equipped with first sealing member on the supporting surface of meal outlet both ends lateral wall, be equipped with the second sealing member on the medial surface of meal outlet both ends lateral wall, the second sealing member is attached in the inboard of first sealing member and the sealing surface of second sealing member is higher than the sealed face of first sealing member, the doctor-bar clamp is established between two first sealing members and is pressed on the second sealing member.

In order to conveniently realize the positioning of the second sealing element and avoid the deformation of the second sealing element caused by the installation dislocation, the inner side surfaces of the side walls at the two ends of the powder outlet are provided with limiting ribs intersected with the bottom surface of the carbon powder bin, and the second sealing element is arranged between the limiting ribs and the bottom surface of the carbon powder bin in a limiting way.

Prevent leaking the powder effect in order to further the reinforcing, avoid too big and cause the uneven in developer roller surface tan peak thickness to developer roller's pressure simultaneously, the elasticity of second sealing member is greater than the elasticity of first sealing member.

In order to avoid the carbon powder to pile up between doctor-bar and wall, also avoid taking place the condition of leaking the powder at the meal outlet top edge, the doctor-bar passes through the mounting panel to be fixed on the wall of meal outlet top edge, is equipped with the sealing strip between the wall of meal outlet top edge and the doctor-bar.

Preferably, the second sealing element is provided with a first avoiding part for avoiding the sealing strip.

In order to avoid the situation of powder leakage from the lower edge of the powder outlet, the lower edge of the powder outlet is provided with a valve pressed on the developing roller.

Preferably, both ends of the valve are arranged below the first sealing element, and the second sealing element is provided with a second avoiding part for avoiding the valve.

The utility model provides a technical scheme that above-mentioned second technical problem adopted does: an image forming apparatus characterized by: the developing roller is supported and arranged on the side walls at two ends of the powder outlet, and the outer surface of the developing roller is tightly pressed on the sealing surfaces of the first sealing element and the second sealing element.

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 carbon dust storehouse seal structure not only sets up and has first sealing member of difference in height, second sealing member to set up the doctor-bar between two first sealing members and press on the second sealing member, so make through the pressure effect of second sealing member to the doctor-bar make doctor-bar and developer roll keep the intimate contact. And first sealing member, second sealing member realize the sealed to the developer roll tip based on the pressure of developer roll, and on the basis, the second sealing member can take place more deflection and then realize the sealed to the gap between doctor-bar and the first sealing member, has effectively avoided taking place the condition of leaking the powder from taking place between doctor-bar and the first sealing member.

The utility model discloses aforementioned toner hopper seal structure image device and printer effectively prevent to leak the powder, have improved the effect of printing.

Drawings

Fig. 1 is a perspective view of a toner hopper sealing structure in an embodiment of the present invention.

Fig. 2 is an exploded perspective view of the toner hopper sealing structure in the embodiment of the present invention.

FIG. 3 is a cross-sectional view of the toner hopper sealing structure in 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 3, the toner hopper sealing structure in the present embodiment includes a toner hopper 1. Usually, the toner hopper 1 is strip-shaped, the lower part of the toner hopper 1 is provided with a toner outlet 11 along the length direction of the toner hopper 1, the side walls at the two ends of the toner outlet 11 are provided with supporting surfaces 12 matched with the developing roller, and because the developing roller is usually in a cylindrical structure, the corresponding supporting surfaces 12 are arc-shaped to match the installation of the developing roller at the position of the toner hopper toner outlet 11.

Be provided with on the wall of powder outlet 11 upper limb and press doctor-bar 2 on the developer roll surface, specifically, this doctor-bar 2 passes through mounting panel 21 to be fixed on the wall of powder outlet 11 upper limb, so mounting panel 21 then can lead to forming the clearance between doctor-bar 2 and the wall, in order to avoid the carbon powder to pile up in this clearance and influence the homogeneity of carbon powder on the developer roll, be equipped with sealing strip 5 between the wall of powder outlet 11 upper limb and doctor-bar 2, this sealing strip 5 can effectively prevent piling up of carbon powder in the aforesaid clearance. The sealing strip 5 forms a seal for the toner hopper 1 at the position of the upper edge of the toner outlet 11.

The supporting surfaces 12 of the side walls at the two ends of the powder outlet 11 are provided with first sealing parts 3, the inner side surfaces of the side walls at the two ends of the powder outlet 11 are provided with second sealing parts 4, and the second sealing parts 4 are attached to the inner sides of the first sealing parts 3. Thus, double-layer sealing is formed at the positions of the side walls at the two ends of the powder outlet 11. The developing roller is pressed on the first sealing element 3 and the second sealing element 4 after being arranged at the position of the powder outlet 11, and the surface of the first sealing element 3 and the surface of the second sealing element 4 pressed on the surface of the developing roller form the sealing surface of the developing roller. The doctor blade 2 is erected between the two first sealing members 3, and the doctor blade 2 is pressed on the second sealing member 4, so that the second sealing member 4 has a tendency of pressing the doctor blade 2 towards the developing roller, so that the doctor blade 2 and the surface of the developing roller are kept in a close contact state, and further, carbon powder output by the powder outlet 11 is uniformly attached to the developing roller. In order to avoid the influence of the extrusion force of the first sealing member 3 on the doctor blade 2 on the adhesion uniformity of the carbon powder on the developing roller, the first sealing member 3 does not contact the doctor blade 2 in an interference fit manner, and usually, a certain distance exists between the first sealing member 3 and the end of the doctor blade 2. In addition, the magnetic carbon powder is adsorbed on the developing roller to generate pressure, and the carbon powder is accumulated in the non-image printing areas at the two ends when the developing roller rotates. In this embodiment, the sealing surface of the second seal 4 is higher than the sealing surface of the first seal 3, and the elasticity of the second seal 4 is greater than that of the first seal 3. So the second is sealed can realize the sealed to clearance between first sealing member 3 and the doctor-bar 2 based on the deformation of developer roll pressure, simultaneously based on the difference in height of second sealing member 4 for first sealing member 3, under the extrusion of developer roll, the part that is higher than first sealing member 3 in second sealing member 4 can be drawn close to the slope of first sealing member 3 top, and then guarantee the reliable sealing member between the two, so thought out good sealing at the both ends of meal outlet 11, the condition of leaking the powder has effectively been avoided appearing.

Specifically, the felt sponge that hardness is higher is adopted to first sealing member 3 in this implementation, and second sealing member 4 adopts softer sponge, and the elasticity of second sealing member 4 is greater than the elasticity of first sealing member 3 like this for the change of second sealing member 4 is out of shape, and can not produce too big pressure to doctor-bar 2, and then guaranteed doctor-bar 2 and developer roll's normal work, avoid leading to the inhomogeneous condition of carbon dust on the developer roll to appear because too big to doctor-bar 2's pressure, guaranteed the printing image effect.

In this embodiment, the first sealing element 3 and the second sealing element 4 can both adopt a double-sided adhesive layer to realize fixed mounting, and in order to ensure effective deformation of the second sealing element 4, the area of the sealing adhesive layer arranged on the second sealing element 4 is smaller than the area of the surface where the sealing adhesive layer is arranged, and the position of the second sealing element 4 required to deform is selected by the position where the sealing adhesive layer is arranged.

In order to conveniently realize the positioning and installation of the second sealing element 4 and avoid the deformation of the second sealing element 4 which cannot play a sealing role due to installation dislocation, the inner side surfaces of the side walls at the two ends of the powder outlet 11 are provided with limiting ribs 13 which are intersected with the bottom surface of the carbon powder bin 1, and the second sealing element 4 is arranged between the limiting ribs 13 and the bottom surface of the carbon powder bin 1 in a limiting way.

In order to ensure the sealing performance of the second sealing member 4, a first escape portion 41 that escapes the weather strip 5 is provided in the second sealing member 4, in which there is a possibility that the positions of the second sealing member 4 and the weather strip 5 are affected by the relative mounting positions of the second sealing member 4 and the weather strip 5.

In order to avoid the powder leakage from the lower edge of the powder outlet 11, the lower edge of the powder outlet 11 is provided with a valve 6 pressed on the developing roller. The two ends of the valve 6 are arranged below the first sealing element 3, and the second sealing element 4 is provided with a second avoiding part 42 for avoiding the valve 6, so that the mutual interference between the second sealing element 4 and the valve 6 is avoided. The valve 6 forms a seal with the toner hopper 1 at the lower edge of the toner outlet 11.

The utility model discloses still relate to and use aforementioned carbon dust storehouse seal structure image device, including the developer roll, the developer roll supporting sets up on the lateral wall at play powder mouth 11 both ends, the both ends position of the inherent developer roll of printer still is provided with the support that is used for installing the developer roll, the developer roll can be to first sealing member 3 after the shelf location, second sealing member 4 produces pressure, the surface of developer roll closely presses first sealing member 3, on the sealed face of second sealing member 4, corresponding first sealing member 3, second sealing member 4 takes place to warp and realizes the sealed to play powder mouth 11 both ends at the developer roll both ends, the powdered ink in the powdered ink storehouse has effectively been avoided takes place to leak the condition of powder from play powder mouth 11 both ends, and then the effect of printing has been improved.

The utility model discloses still relate to the printer, this printer is used like aforementioned image device, and this printer can effectively prevent to leak the powder, guarantees to print the effect.

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 invention, but are used herein for convenience of description only and are to be determined based on the 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

1. The utility model provides a carbon powder storehouse seal structure, includes carbon powder storehouse (1), powder outlet (11) have been seted up to the lower part in carbon powder storehouse (1), the lateral wall at powder outlet (11) both ends have with developer roll assorted holding surface (12), be provided with doctor-bar (2) of pressure on the developer roll surface on the wall of powder outlet (11) upper edge, its characterized in that: be equipped with first sealing member (3) on the bearing surface (12) of meal outlet (11) both ends lateral wall, be equipped with second sealing member (4) on the inboard face of meal outlet (11) both ends lateral wall, second sealing member (4) are attached in the inboard of first sealing member (3) and the sealing surface of second sealing member (4) is higher than the sealed face of first sealing member (3), doctor-bar (2) press from both sides and are established between two first sealing member (3) and press on second sealing member (4).

2. A toner hopper sealing structure according to claim 1, wherein: the inner side faces of the side walls at the two ends of the powder outlet (11) are provided with limiting ribs (13) intersected with the bottom face of the carbon powder bin (1), and the second sealing element (4) is arranged between the limiting ribs (13) and the bottom face of the carbon powder bin (1) in a limiting mode.

3. A toner hopper sealing structure according to claim 1, wherein: the elasticity of the second sealing element (4) is greater than the elasticity of the first sealing element (3).

4. A toner hopper sealing structure according to any of claims 1 to 3, wherein: the doctor-bar (2) is fixed on the wall surface of the upper edge of the powder outlet (11) through the mounting plate (21), and a sealing strip (5) is arranged between the wall surface of the upper edge of the powder outlet (11) and the doctor-bar (2).

5. A toner hopper sealing structure according to claim 4, wherein: and a first avoiding part (41) for avoiding the sealing strip (5) is arranged on the second sealing element (4).

6. A toner hopper sealing structure according to claim 4, wherein: and a valve (6) pressed on the developing roller is arranged at the lower edge of the powder outlet (11).

7. A toner hopper sealing structure according to claim 6, wherein: the two ends of the valve (6) are arranged below the first sealing element (3), and a second avoiding portion (42) for avoiding the valve (6) is arranged on the second sealing element (4).

8. An image forming apparatus characterized by: comprises the toner hopper sealing structure as defined in any one of claims 1 to 7, and further comprises a developing roller which is supported and arranged on the side walls at the two ends of the toner outlet (11), and the outer surface of the developing roller is tightly pressed on the sealing surfaces of the first sealing element (3) and the second sealing element (4).

9. A printer, characterized by: comprising an imaging device according to claim 8.