CN203673231U - Processing box for image forming device - Google Patents

Abstract

The utility model provides a processing box for an image forming device, which comprises a photosensitive element; a developing element; a first frame, which is provided with a developing element installation unit; a second frame, which is provided with a photosensitive element installation unit; The first frame and the second frame; the first conductive element is arranged on the one of the side covers, and a part is exposed to form an electrical connection with the conductive contacts in the image forming device; the second conductive The component includes an insertion part that can be inserted into the mounting part of the developing component, and a contact part that is in contact with the first conductive component; it is characterized in that the contact part on the second conductive component is in contact with the first conductive component The elements are elastically abutted so that the second conductive element can slide relative to the first conductive element while they are in contact. With this arrangement, it can be ensured that the position adjustment mechanism of the developing element can more easily adjust the distance between the developing element and the photosensitive element when the conductive element is well conductive.

Description

Process cartridge for image forming apparatus

technical field

The utility model relates to a processing box for an image forming device.

Background technique

Laser printers, copiers or fax machines and other equipment using electrophotographic technology are more and more favored by users for their high quality, high speed and competitive price.

In this image forming device realizing electrophotography technology, a process cartridge is detachably installed, and a developer is contained in the process cartridge, and also includes: a developer containing chamber, and a developing element, such as a magnetic A roller or developer roller, and a photosensitive element, are used to form an electrostatic latent image. Among them, the developer is stirred and transferred in the accommodation chamber, and the developer is evenly distributed on the developing element, and the developing element and the photosensitive element are connected to the circuit in the image forming device through the conductive element. During the working process of the cartridge, a potential difference is formed between the developing element and the photosensitive element, so that the developer is drawn to the predetermined area on the photosensitive element under the action of the electric field force; as the developing element and the photosensitive element are continuously rotated, the developer is always It can be supplied to a photosensitive element and then transferred to a printing medium to complete image formation. And in this processing box, usually be provided with the conductive element that detects the remaining amount of developer in the powder bin, the conductive element is made of conductive steel shaft, and at least includes two parts, one part is inserted into the inside of the processing box, and the other A part is in contact with an external conductive member, so that an electrical signal corresponding to the amount of developer in the process cartridge is transmitted to the image forming device.

In a process cartridge in the prior art, in order to ensure that the distance between the developing element and the photosensitive element is controlled within a predetermined range, an adjustment mechanism is usually provided. As shown in Figure 1, it is a partial schematic view of a developing element assembly of a process cartridge in the prior art, the developing element assembly is assembled on a developing element compartment 101, including: a developing element bracket 102 for positioning the developing element; a developing element 103; The conductive steel shaft 104 is used to electrically connect the inside and outside of the developing element compartment; the spring 105, as a part of the adjustment structure, adjusts the up and down movement of the developing element assembly (in the direction of the arrow in the figure). In this way, during the working process of the process cartridge, the developing element assembly moves along the direction of the spring to adjust the gap with the photosensitive element to ensure the printing quality.

In addition, in the above process box, the conductive steel shaft 104 transmits electric signals with the image forming device through the conductive sheet clamped on the side cover. FIG. 2 is a partial schematic diagram of the cooperation of the conductive steel shaft 104 and the conductive sheet. There is a problem in this matching method: since the conductive sheet is fixed on the side cover, and the conductive steel shaft 104 is clamped between the two ends 106, 107 of the conductive sheet, when the photosensitive element rotates rapidly, due to the conductive The steel shaft is clamped, and the distance that the developing element assembly can move in the direction of the arrow in Figure 1 is very limited, so the developing element cannot move close to the photosensitive element in the direction of the arrow, resulting in printing defects.

Utility model content

In order to solve the above-mentioned technical problem that the developing element cannot be close to the photosensitive element, the utility model provides a technical solution that allows the developing element assembly to move freely, and the electrical contact performance of the conductive element is good. The technical scheme that the utility model adopts is:

A process cartridge for an image forming apparatus, comprising:

a developing element for forming an electrostatic latent image on the photosensitive element;

the first frame is provided with a storage chamber for accommodating the developer, and the first frame is provided with a developing element installation unit;

Two side covers are respectively located on both sides of the first frame;

The first conductive element is disposed on the one of the side covers, and a part is exposed to the outside, for forming an electrical connection with a conductive contact in the image forming device;

The second conductive element includes an insertion portion that can be inserted into the developing element installation portion, and a contact portion that is in contact with the first conductive element; it is characterized in that the contact portion on the second conductive element is in contact with the The first conductive element elastically abuts, so that the second conductive element can slide relative to the first conductive element while in contact.

The process cartridge for an image forming device further includes: a photosensitive element; a second frame provided with an accommodating chamber for accommodating remaining developer, and a photosensitive element installation unit is arranged on the second frame; the two side covers respectively Located on both sides of the first frame and the second frame in the axial direction of the photosensitive element, and used for connecting the first frame and the second frame.

The process cartridge for an image forming device further includes a developing element position adjustment assembly, the developing element can move relative to the photosensitive element; and the moving direction of the developing element is the same as the moving direction of the second conductive element.

The first conductive element is a conductive sheet, and the conductive sheet includes a fixed end connected to the inner wall of the side cover, a free end in contact with the contact portion on the second conductive element, and a fixed end connected to the free end. connection part.

During the abutment process between the free end and the upper contact portion of the second conductive element, an interaction force along the axial direction of the developing element is generated.

The connecting portion forms an obtuse angle with the fixed end of the first conductive element, and forms an acute angle with the free end of the first conductive element.

The plane where the free end is located is perpendicular to the axial direction of the developing element.

The free ends are two sheet-like structures, and both are rectangular with the same shape.

The second conductive element is a conductive steel shaft, and the insertion part of the conductive steel shaft is perpendicular to the contact part.

The first frame includes a storage chamber for accommodating developer and a developing member receiving compartment, and the developing member installation unit and the developing member position adjusting assembly are both disposed at an end of the developing member receiving compartment.

The developing element installation unit is arranged at the developer opening position on the storage chamber containing the developer, and the developing element position adjusting assembly is arranged outside the storage chamber.

After adopting the above-mentioned technical solution, since the engagement between the contact part on the second conductive element and the first conductive element is improved to elastic abutment, the second conductive element can be opposite to the first conductive element while they are in contact. Sliding, this can ensure that the first conductive element and the second conductive element can be in good contact at any time, and the electrical conductivity of the two is well guaranteed; thereby ensuring good printing quality. Specifically, when the second conductive element moves between the developing element and the photosensitive element, the second conductive element can also move relative to the photosensitive element, so the first conductive element and the second conductive element can be in good contact at any time. . Further, the moving direction of the developing element is the same as the moving direction of the second conductive element, and the adjusting component of the developing element will not affect the first conductive element and the second conductive element when adjusting the distance between the developing element and the photosensitive element. contact status. Furthermore, the plane where the free end of the second conductive element is located is perpendicular to the axial direction of the developing element, which allows the first conductive element to move more easily on the plane of the second conductive element, and the free end is in contact with the second conductive element. During the abutment process, the contact part on the conductive element generates an interaction force along the axial direction of the developing element, which can make the contact between the first conductive element and the second conductive element closer, and the conductive effect is better. In addition, the connection part and the second conductive element An obtuse angle is formed between the fixed ends of a conductive element, and an acute angle is formed between the free ends of the first conductive element, which is not only conducive to the manufacture of the second conductive element, but also improves the above-mentioned contact effect.

Description of drawings

Fig. 1 is a partial structural schematic diagram of a magnetic roller assembly in the prior art;

Fig. 2 is a structural schematic diagram of the cooperation of the conductive steel shaft and the conductive sheet in the prior art;

Fig. 3 is a structural schematic diagram of the utility model related to the process box;

Fig. 4 is an exploded schematic diagram of a process box related to the utility model;

Fig. 5 is an exploded schematic diagram of another viewing angle of the process box related to the utility model;

Fig. 6 is a partially enlarged schematic diagram shown in Fig. 5;

Fig. 7 is a partially enlarged schematic diagram corresponding to area A in Fig. 6;

Fig. 8 is a partially enlarged schematic diagram corresponding to area B in Fig. 6;

Fig. 9 is a structural schematic diagram of a conductive steel shaft;

Fig. 10 is a schematic structural view of the process box without a side cover;

FIG. 11 is a partially enlarged schematic diagram of FIG. 10 .

reference sign

Detailed ways

In order to make those skilled in the art more easily and clearly understand the technical solutions involved in the utility model, the following will be described in conjunction with specific embodiments.

As shown in Fig. 3, Fig. 4 and Fig. 5, the process cartridge 1 for an image forming device provided by the present invention includes: a photosensitive element, which is composed of a photosensitive drum 7; a developing element, which is used to form an electrostatic latent image on the photosensitive element , the utility model is preferably a magnetic roller 6; the first frame is provided with a storage room for accommodating the developer, the storage room is also called powder bin 2, and the first frame is provided with a developing element installation unit, the utility model preferably The ground is the magnetic roller installation unit 60; and the first frame of the utility model is preferably composed of a powder bin and a magnetic roller bin (developing element storage bin), the two are separately injected, and then fixed by clamping or welding, and the above magnetic The roller installation unit 60 is arranged at the position of the opening part of the magnetic roller chamber, so that the developer flows out sequentially through: the powder chamber, the magnetic roller chamber, the magnetic roller, and then the developer is supplied to the photosensitive drum outside the first frame by the magnetic roller 6 7. Form an electrostatic latent image.

The second frame is provided with an accommodating chamber for accommodating the remaining developer, and this accommodating chamber is also called the waste toner bin 3. The photosensitive element installation unit is arranged on the second frame, and the photosensitive drum 7 is fixed on the second side by the drum shaft pin 7a. on the second frame.

The two side covers 4, 5 are respectively located on both sides of the first frame and the second frame in the axial direction of the photosensitive drum 7, and are used to connect the first frame and the second frame, specifically, It can be further fastened by providing buckles connected to the first frame and the second frame on the side cover and adding screws.

The first conductive element is disposed on one of the side covers 4 , and a part thereof is exposed to the outside for forming an electrical connection with a conductive contact in the image forming device. Preferably, the first conductive element is the first conductive sheet 81 . A second conductive sheet 91 , the magnetic roller conductive sheet 61 connected to the magnetic roller 6 is also arranged on the side cover 4 .

The second conductive member includes an insertion portion insertable into the developing member mounting portion, and a contact portion in contact with the first conductive member. Preferably the second conductive element is the first conductive steel shaft 8, the specific structure of the first conductive steel shaft 8 is as shown in Figure 9, including an insertion part 9a that can be inserted into the magnetic roller housing, and a first conductive sheet 81, the contact portion 9b where the free end contacts, the insertion portion 9a and the contact portion 9b are perpendicular to each other.

And the contact portion on the second conductive element is in elastic contact with the first conductive element, so that the second conductive element can slide relative to the first conductive element while in contact. Specifically, as shown in Figure 10 and Figure 11, the first conductive sheet 81 can move relative to the first conductive steel shaft 8, so that it can be ensured that the first conductive sheet 81 and the first conductive steel shaft 8 can be easily connected at any time. Good contact, which ensures the electrical conductivity of the two; thus ensuring good printing quality.

The image forming device process cartridge 1 provided by the utility model also includes a developing element adjusting assembly, as shown in Figure 5 and Figure 6, the developing element adjusting assembly is preferably arranged at one end of the magnetic roller housing, including: a magnetic roller supporting the magnetic roller The bracket is a spring 10 that pushes the magnetic roller bracket to move; in this way, according to external conditions, the distance between the magnetic roller 6 and the photosensitive drum 7 is adjusted through the expansion and contraction of the spring 10 . Moreover, the moving direction of the developing element is the same as the moving direction of the second conductive element, and the adjusting assembly of the developing element will not affect the distance between the first conductive element and the second conductive element when adjusting the distance between the developing element and the photosensitive element. contact status.

As shown in Fig. 6, Fig. 7, Fig. 10 and Fig. 11, the first conductive sheet 81 includes a fixed end connected to the inner wall of the side cover, preferably, the fixed end and the inner wall of the side cover are clamped way, directly inserted into the inner wall of the side cover, a free end in contact with the contact portion on the second conductive element, and a connection portion connecting the fixed end and the free end. During the abutment process between the free end and the upper contact portion of the second conductive element, an interaction force along the axial direction of the developing element is generated. Moreover, an obtuse angle α is formed between the connecting portion and the fixed end of the first conductive element, and an acute angle β is formed between the connecting portion and the free end of the first conductive element. In this way, the hardness and elasticity of the second conductive steel sheet 91 are better maintained, and the manufacture is simple. In addition, preferably, the part connected to the fixed end is set to be exposed to the outside, as shown in Figure 10, five protrusions are arranged on the part exposed to the outside, so that the part exposed to the outside is electrically conductive with the image forming device. The contacts make better contact and thus conduct electricity better.

In addition, the plane where the free end of the first conductive sheet 81 is located is perpendicular to, or approximately perpendicular to, the axial direction of the developing element. The advantage of this design is that the plane where the free end of the first conductive sheet 81 is located is parallel to the sliding direction of the contact part of the first conductive steel shaft 8, thereby avoiding large resistance during the movement of the first conductive sheet 81 and the first conductive steel shaft 8.

In addition, in order to facilitate production and save materials, the free ends of the first conductive sheet are two sheet-shaped structures, and both are rectangular in shape, so that part of the material can be saved in the middle section of the two sheet-shaped structures.

The image forming device processing box 1 provided by the utility model also provides a detection unit for detecting the remaining amount of developer in the processing box 1, including: a first conductive steel shaft 8, a first conductive sheet 81, and a plug that can be inserted into the powder bin The second conductive steel shaft 9 and the second conductive sheet 91 arranged in the side cover 4 . In this way, the developer in the powder bin and the magnetic roller bin, the first conductive steel shaft 8, the first conductive sheet 81, the detection circuit in the printer, the second conductive steel shaft 9, and the second conductive sheet 91 are connected in series in sequence, so the processing The developer amount in the cartridge 1 can be detected by being converted into an electrical signal. Of course, the detection circuit in the detection process cartridge 1 is not limited to the above, for example, the end of the magnetic roller and the conductive sheet of the magnetic roller can also be replaced and combined with the above elements to form a detection circuit.

In addition, the above-mentioned embodiments all have a magnetic roller housing. For the present utility model, the first frame can also be designed as follows: the developing element installation unit is arranged at the developer opening position on the storage chamber containing the developer. The element position adjustment assembly is arranged outside the storage chamber, so that the first frame part can be directly integrally injected.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features, such as replacing the developing element with a developing roller, and replacing the developing element installation unit with a developing roller installation unit; and These modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions protected by the present utility model.

Claims (11)

1. a processing box for image forming device, comprising:

Developing element, is used to form electrostatic latent image;

The first framework, is provided with the locker room for receiving photographic developer, on described the first framework, is provided with developing element installation unit;

Two side covers, lay respectively at the first framework both sides;

The first conducting element is arranged on described one of them side cover, and outside some is exposed to, for forming and be electrically connected with the conductive contact in image processing system;

The second conducting element, comprises insertion portion, can be inserted in described developing element mounting portion, and contact portion, contact with described the first conducting element; It is characterized in that,

Contact portion on the second conducting element and described the first conducting element elasticity butt, so that described the second conducting element can relative sliding in contacting with the first conducting element.

2. processing box for image forming device as claimed in claim 1, is characterized in that, also comprises: photo-sensitive cell; The second framework, is provided with the accommodating chamber for receiving residue developer, on described the second framework, is provided with photo-sensitive cell installation unit; Described two side covers, on photo-sensitive cell axis direction, are positioned at the both sides of described the first framework and the second framework respectively, and for connecting described the first framework and described the second framework.

3. processing box for image forming device as claimed in claim 1 or 2, is characterized in that, also comprises developing element position adjustment assembly, and described developing element can move relative to photo-sensitive cell; And the moving direction of described developing element is identical with the direction that described the second conducting element moves.

4. processing box for image forming device as claimed in claim 3, it is characterized in that, described the first conducting element is conducting strip, and conducting strip comprises a stiff end being connected with described side cover inwall, with a free end contacting with contact portion on described the second conducting element, and be connected and fixed end and free-ended coupling part.

5. processing box for image forming device as claimed in claim 4, is characterized in that, on described free end and described the second conducting element, contact portion, in butt process, produces one along the axial interaction force of developing element.

6. processing box for image forming device as claimed in claim 4, is characterized in that, forms obtuse angle, and form acute angle between the first conducting element free end between described coupling part and the first conducting element stiff end.

7. processing box for image forming device as claimed in claim 4, is characterized in that, described free end place plane is perpendicular to the axial direction of described developing element.

8. processing box for image forming device as claimed in claim 4, is characterized in that, described free end is the structure of two sheets, and the two is the rectangle that shape is identical.

9. processing box for image forming device as claimed in claim 3, is characterized in that, described the second conducting element is conductive steel axle, and conductive steel axle insertion portion is mutually vertical with described contact portion.

10. processing box for image forming device as claimed in claim 3, it is characterized in that, described the first framework comprises that the locker room of receiving photographic developer and developing element hold storehouse, and described developing element installation unit and developing element position are adjusted assembly and be all arranged on the end that developing element holds storehouse.

11. processing box for image forming devices as claimed in claim 3, it is characterized in that described developing element installation unit is arranged on the developer openings position in the locker room of receiving photographic developer, assembly is adjusted and is arranged on the outside of described locker room in developing element position.

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