CN214225583U - Optical scanning unit and image forming device - Google Patents

Abstract

An embodiment of the utility model provides a pair of optical scanning unit and image forming device, optical scanning unit includes: a light source, an optical deflector, an optical element, a support member, and an adjustment unit that adjusts a position of the optical element on the support member; the adjusting unit comprises an adjusting element and an elastic component, the elastic component is arranged between the optical element and the supporting component, the adjusting element acts on the optical element, and the position of the optical element on the supporting component is changed by the corresponding change of the deformation of the elastic component. The embodiment of the utility model provides an in, through the position of regulating unit adjustment optical element on the supporting component, realize the adjustment of the distance of optical scanning unit to sensitization drum, and/or the adjustment of the distance between the adjacent sensitization drum, and then realize the adjustment of the carbon powder capacity size in powder box space for same optical scanning unit satisfies different powder box capacity demands.

Description

Optical scanning unit and image forming device

Technical Field

The utility model relates to an image forming technology field specifically relates to an optical scanning unit and image forming device.

Background

An image forming apparatus is a device that forms an image on a recording medium by the principle of image formation, such as a printer, a facsimile machine, a copying machine, and the like. An image forming apparatus generally includes an optical scanning unit for scanning a light beam modulated according to image information onto a scanned target surface of a photosensitive drum.

Taking a printer as an example, in order to reduce the development cost of the optical scanning unit, it is desirable to be able to apply the same optical scanning unit (having the same optical system) to a plurality of types of printers, that is, to increase the applicability of the optical scanning unit. However, the requirements of printers with different models and different printing speeds on the toner capacity of the toner cartridge are often different, and the toner capacity of the toner cartridge in the printer is affected by the distance between the light outlet of the optical scanning unit and the target surface to be scanned by the photosensitive drum.

That is, printers of different models and different printing speeds have different requirements for the distance between the light exit of the optical scanning unit and the target surface to be scanned by the photosensitive drum. However, the optical path lengths of the optical scanning units of the same optical system are the same, so that it is difficult for the same optical scanning unit to meet the requirement of large variation in the cartridge capacity.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an optical scanning unit and image forming device to do benefit to and solve the problem that same optical scanning unit can't be applicable to different powder box capacity demands among the prior art.

In a first aspect, an embodiment of the present invention provides an optical scanning unit, including:

a light source for emitting a light beam;

an optical deflector for deflecting the light beam emitted from the light source;

an optical element for directing the light beam deflected by the optical deflector onto a scanned target surface;

a support member that supports an end portion in a longitudinal direction of the optical element;

an adjustment unit that adjusts a position of the optical element on the support member;

the adjusting unit comprises an adjusting element and an elastic component, the elastic component is arranged between the optical element and the supporting component, the adjusting element acts on the optical element, and the position of the optical element on the supporting component is changed by the corresponding change of the deformation of the elastic component.

Preferably, the support member includes a first sidewall and a second sidewall, the first sidewall being disposed opposite to the second sidewall.

Preferably, the adjusting unit is disposed at an end of the optical element in a longitudinal direction, the adjusting element is disposed on the first sidewall, the adjusting element is movable relative to the first sidewall, the elastic member is disposed on the second sidewall, and when the adjusting element moves, a deformation amount of the elastic member changes accordingly to change a position of the optical element on the supporting member.

Preferably, the optical scanning unit further includes a pressing member that presses the optical element against the supporting member.

Preferably, the pressing member is a fixed elastic sheet, and the fixed elastic sheet presses the optical element against the supporting member by an elastic force.

Preferably, the fixing elastic piece includes a first elastic arm, the first elastic arm presses against the first surface of the optical element to press the optical element against the supporting member, wherein an elastic force of the first elastic arm in a direction perpendicular to the first surface of the optical element is smaller than an elastic force of the elastic member acting on the second surface of the optical element.

Preferably, the fixing elastic piece includes a second elastic arm, the second elastic arm presses against the first side surface of the optical element, the second side surface of the optical element presses against the supporting member, and the first side surface and the second side surface are arranged oppositely.

Preferably, the optical scanning unit further has an optical box that accommodates the light source, the optical deflector, the optical element, the support member, the adjustment unit, and the pressing member, the support member being a part of the optical box.

Preferably, the optical element is a mirror reflecting the light beam, and/or an optical lens through which the light beam passes.

In a second aspect, an embodiment of the present application provides an image forming apparatus, including the optical scanning unit of any one of the first aspects, and a photosensitive drum cooperating with the optical scanning unit, wherein a light beam emitted by the optical scanning unit forms an electrostatic latent image on a photosensitive surface of the photosensitive drum;

the developing device develops the electrostatic latent image to form a carbon powder image;

the transfer printing device transfers the carbon powder image to a transfer printing medium;

and a fixing device for fixing the transferred carbon powder image on the transfer medium.

The embodiment of the utility model provides an in, through the position of regulating unit adjustment optical element on the supporting component, realize the adjustment of the distance of optical scanning unit to sensitization drum, and/or the adjustment of the distance between the adjacent sensitization drum, and then realize the adjustment in powder box space for same optical scanning unit satisfies different powder box capacity demands.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of an image forming apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an optical scanning unit according to an embodiment of the present invention;

fig. 3 is an optical schematic diagram of an optical scanning unit according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an optical deflector according to an embodiment of the present invention;

fig. 5 is a schematic view illustrating installation and adjustment of a reflector according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a fixing elastic piece according to an embodiment of the present invention;

fig. 7 is a schematic diagram illustrating an influence factor of a space toner capacity of a toner cartridge according to an embodiment of the present invention;

fig. 8 is a schematic diagram illustrating adjustment of the spatial toner capacity of the toner cartridge in the height direction according to an embodiment of the present invention;

fig. 9 is a schematic diagram illustrating adjustment of the space toner capacity of the toner cartridge in the direction of the mutual spacing according to an embodiment of the present invention.

Detailed Description

For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.

It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., A and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Referring to fig. 1, a schematic structural diagram of an image forming apparatus 100 according to an embodiment of the present invention is shown. In fig. 1, the structure of the image forming apparatus 100 is described by taking a color laser printing device as an example, but the invention should not be construed as being limited by the scope of the present invention. It is understood that the image forming apparatus 100 according to the embodiment of the present invention may be a monochrome laser printing device, a facsimile machine, a copier, or the like.

As shown in fig. 1, the image forming apparatus 100 includes photosensitive drums 101Y-K, charging rollers 102Y-K, developing rollers 103Y-K, powder bins 104Y-K, a transfer belt 105, a secondary transfer roller 106, a paper feed cassette 107, a manual paper feed tray 108, a pickup roller 109, a carrying roller 110, a paper detection sensor 120, an optical scanning unit 111, a heat roller 112, a pressure roller 113, a discharge roller 114, a discharge paper cassette 115, and the like. Generally, the cartridges Y-K include photosensitive drums 101Y-K, charging rollers 102Y-K, developing rollers 103Y-K, and powder hoppers 104Y-K for containing toner, respectively.

In the embodiment of the present invention, the optical Scanning Unit 111 may be in the form of a single Laser Scanning Unit (LSU for short), and includes four light paths. The four charging rollers 102Y-K are used for respectively charging the surfaces of the four photosensitive drums 101Y-K, the laser beams respectively emitted by the four optical paths of the optical scanning unit 111 form electrostatic latent images on the surfaces of the photosensitive drums 101Y-K, the four developing rollers 103Y-K are used for respectively developing and forming toner images with corresponding colors on the surfaces of the photosensitive drums 101Y-K, the image forming apparatus 100 adopts a secondary transfer mode, that is, the four photosensitive drums 101Y-K sequentially transfer the toner images onto the transfer belt 105, the transfer belt 105 has a certain transfer voltage, so that the toner images on the surfaces of the photosensitive drums 101Y-K are more easily absorbed onto the transfer belt 105, and then the color toner images formed on the transfer belt 105 are secondarily transferred onto paper by the secondary transfer roller 106. The paper feed cassette 107 stores paper, and the pickup roller 109 transports the paper stored in the paper feed cassette 107 to a transport path (hereinafter referred to as a paper path). The carrying roller 110 is used to carry the sheet to the secondary transfer roller 106.

The secondary transfer roller 106 conveys the sheet to which the toner image is transferred to a nip of a heat roller 112 and a pressure roller 113, the heat roller 112 and the pressure roller 113 are used to fix the toner image on the sheet, the heat roller 112 may adopt a ceramic heating method or a halogen lamp heating method, the heat roller 112 and the pressure roller 113 convey the sheet after fixing to a discharge roller 114, and the discharge roller 114 discharges the sheet to a discharge paper cassette 115 and stacks it.

In order to improve the quality of the printed image, the light beam emitted from the optical scanning unit 111 is scanned onto the photosensitive drum 101Y-K, the photosensitive drum 101Y-K includes a cylindrical metal tube having an outer circumference, a photosensitive layer having a predetermined thickness is formed on the outer circumference of the cylindrical metal tube, and a photosensitive surface of the photosensitive drum 101Y-K, i.e., a surface of the target to be scanned, is formed. The charging rollers 102Y-K rotate and contact the photosensitive drums 101Y-K, and charge the photosensitive surfaces of the photosensitive drums 101Y-K to a uniform potential. The optical scanning unit 111 scans the light beam adjusted according to the image information in the main scanning direction, thereby forming electrostatic latent images on the target surfaces to be scanned of the photosensitive drums 101Y-K. In this case, the image forming surface moves in the sub-scanning direction with the rotation of the photosensitive drums 101Y-K, and the main scanning direction is perpendicular to the sub-scanning direction. The optical scanning unit 111 is synchronized with a horizontal synchronization signal to scan the light beam onto the imaging surface in the main scanning direction.

Referring to fig. 2, in order to provide a schematic structural diagram of an optical scanning unit 111 according to an embodiment of the present invention, the optical scanning unit 111 is the optical scanning unit 111 of the image forming apparatus 100 in the embodiment shown in fig. 1. As shown in fig. 2, the optical scanning unit 111 includes a light source 11, an optical deflector 40, a first optical unit 30, a second optical unit 50, a synchronization detection lens 61, a synchronization detection sensor 62, and a reflection unit 52.

The optical scanning unit 111 further includes a support member for easy support and fixation. The light source 11, the optical deflector 40, the first optical unit 30, the second optical unit 50, the synchronization detection lens 61, the synchronization detection sensor 62, and the reflection unit 52 may be partially or entirely mounted and fixed on the support member. In a particular implementation, the support member may be a frame-like structure, i.e., a support frame 20. Of course, those skilled in the art can adjust the structure according to actual needs, and the embodiment of the present invention is not limited to the structure of the supporting frame 20.

Referring to fig. 3, an optical schematic diagram of an optical scanning unit 111 according to an embodiment of the present invention is provided. The operation of the optical scanning unit 111 will be described in detail below with reference to fig. 3.

The light source 11 may be a laser diode, a lamp or any other suitable light source having at least 1 light emitting point as a light source emitting light beams of the optical scanning unit 111. Wherein the light source 11 can emit 1, 2 or more light beams. For example, in a black-and-white laser printing apparatus, the light source 11 of the optical scanning unit 111 only needs to emit 1 light beam; in the color laser printing apparatus, the light source 11 of the optical scanning unit 111 needs to emit 4 light beams. For example, in the embodiment shown in fig. 3, the light source 11 includes four light-emitting points 11a, 11b, 11c, and 11d, wherein the light-emitting points 11a, 11b, 11c, and 11d emit 1 light beam, respectively.

The first optical unit 30 is disposed between the light source 11 and the optical deflector 40, the first optical unit 30 includes a collimating lens that transforms the light beam emitted from the light source 11 into a parallel light beam and a cylindrical lens that converges the parallel light beam onto the polygon mirror 41 of the optical deflector 40 in the sub-scanning direction, and the first optical unit 30 may also be a single anamorphic lens (DOE) that performs functions of the collimating lens and the cylindrical lens, which may be made of a plastic material or a glass material. It is understood that the number of the first optical units 30 may correspond to the number of light emitting points of the light source 11. For example, in the embodiment shown in fig. 3, the light source 11 includes four light emitting points 11a, 11b, 11c, and 11d, and the optical scanning unit 111 includes four first optical units 30, and the four first optical units 30 are configured to converge the light beams emitted from the light emitting points 11a, 11b, 11c, and 11d onto the reflection surface of the polygon mirror 41, i.e., onto the polygon mirror surface 43 of the polygon mirror 41, respectively.

The first optical unit 30 is mounted on the support frame 20, and the light emitting points 11a, 11b, 11c and 11d of the light source 11 are combined with the substrate 12 and mounted on the support frame 20, wherein the support frame 20 has an aperture forming a diaphragm 21 for shaping the light beam emitted from the light source 11, and the aperture may be circular, elliptical or square. Although the diaphragm 21 is disposed between the light source 11 and the first optical unit 30 in fig. 2 and 3, the position of the diaphragm 21 is not limited thereto, and for example, the diaphragm 21 may be disposed between the first optical unit 30 and the optical deflector 40. Furthermore, the diaphragm 21 may also be omitted in some possible embodiments.

Referring to fig. 4, a schematic structural diagram of an optical deflector according to an embodiment of the present invention is shown. As shown in fig. 4, the optical deflector 40 comprises a polygon mirror 41, a motor 42, the polygon mirror 41 comprising a polygon mirror surface 43, and a base plate 44, wherein the polygon mirror 41 is mounted on the motor 42, and the motor 42 is fixedly connected to the base plate 44. The optical deflector 40 deflects and scans a light beam onto a surface of a scanned object in a main scanning direction, a rotating polygon mirror having a plurality of mirror surfaces may be used as the polygon mirror 41 of the optical deflector 40, and the light beam emitted from the light source 11 is transmitted onto the polygon mirror 41 of the optical deflector 40 to be deflected and reflected toward the surface of the scanned object in the main scanning direction. For example, in FIG. 3, as the optical deflector 40 rotates in the A direction, the beam is deflected in the B direction onto the scanned target surface.

In the embodiment of the present invention, the number of the deflecting surfaces of the polygon mirror 41 is 4, and of course, the number of the deflecting surfaces of the polygon mirror 41 may be other numbers, which is not limited by the present invention.

The second optical unit 50 is disposed between the optical deflector 40 and the surface of the scanned target, for imaging the light beam deflected by the optical deflector 40 on the surface of the scanned target. The second optical unit 50 may be composed of a set of f θ lenses 51a and 51b, compensated using different magnifications in the main scanning direction and the sub-scanning direction, and the light beam deflected by the optical deflector 40 is focused on the scanned target surface of the photosensitive drum. In order to reduce the size and the number of parts of the optical scanning unit 111, the f θ lens 51 may be an injection-molded aspherical lens. Among them, the f θ lens 51 has a surface in an aspherical shape or a curved surface capable of focusing light energy emitted at a certain frequency on the surface of the scanned object of the photosensitive drum at uniform intervals in the main scanning direction. In the embodiment shown in fig. 3, the left and right sides of the optical deflector 40 are provided with a set of f θ lenses 51a and 51b, respectively, for imaging the light beams reflected to the left and right sides by the optical deflector 40 on the surface of the scanned object, respectively.

And a sync detection lens 61 disposed on an upstream side of the second optical unit 50 in a direction of deflection of the optical deflector 40 between the light source 11 and the second optical unit 50, for focusing the light beam deflected by the optical deflector 40 to a surface of the sync detection sensor 62. The position of the synchronization detection lens 61 is not limited thereto, and the synchronization detection lens 61 may be omitted in some possible embodiments.

The synchronization detection sensor 62 receives the light beam focused by the synchronization detection lens 61 and generates an electric signal (line synchronization signal) for controlling the light emission timing of the light source 11 so that the scanning lines of each line on the surface of the scanned object are aligned in the main scanning direction.

It can be understood that the optical path lengths are the same for the same optical scanning unit 111. However, the requirements of the printing devices of different models and different printing speeds on the toner capacity of the toner cartridge are often different, so that the requirements of the printing devices of different models and different printing speeds on the distance from the light outlet of the optical scanning unit 111 to the surface of the scanned target of the photosensitive drum are different, and further the compatibility of the optical scanning unit 111 is poor, and the requirements of large difference in toner cartridge capacity are difficult to meet. To this problem, the embodiment of the utility model provides an optical scanning unit 111 is still including the regulating unit who adjusts each optical element position, and optical element sets up on the supporting component, and regulating unit adjusts optical element position on the supporting component, can change the direction of light path, and then changes the distance between the scanned target surface that the light beam corresponds to the sensitization drum, realizes the powdered carbon capacity differentiation demand of powder box, and this optical element can be the reflection unit 52 of reflected beam, and/or the optical lens that the light beam sees through. One skilled in the art can configure the optical element with one or more mirrors and/or optical lenses according to actual needs, and the present invention is not limited in this regard. In a specific implementation, the optical element is a reflection unit 52, the reflection unit 52 is disposed between the second optical unit 50 and the scanned target surface, and is used for guiding the light beam deflected by the optical deflector 40 onto the scanned target surface, the reflection unit 52 includes mirrors 521, 522, and 523, the mirrors 521, 522, and 523 are disposed on the supporting member, and the adjustment unit can adjust the positions of the mirrors 521, 522, and 523 on the supporting member, so as to change the guiding direction of the light beam by the mirrors 521, 522, and 523. The direction of the light path is changed, so that the distance between the light beams corresponding to the scanned target surface of the photosensitive drum is changed, and the requirement of the toner cartridge for the capacity differentiation of toner is met.

The operation principle of the adjusting unit will be described below by taking the adjustment of the position of one of the mirrors in the reflecting unit 52 as an example.

Referring to fig. 5, a schematic view of installation and adjustment of a reflector according to an embodiment of the present invention is provided. As shown in fig. 5, the supporting member is a supporting frame 20, and the supporting frame 20 includes a first side wall 20a and a second side wall 20b, and the first side wall 20a and the second side wall 20b are oppositely disposed. The mirror 521 is disposed between the first and second sidewalls 20a and 20b, and the end of the mirror 521 (the lower left end of the mirror 521 shown in fig. 5) is supported by the support frame 20.

The support frame 20 is further provided with an adjusting unit for adjusting the position of the reflecting mirror 521. Specifically, the adjustment unit includes an adjustment element and an elastic member, the elastic member is disposed between the mirror 521 and the support frame 20, the adjustment element acts on the mirror 521, and the deformation amount of the elastic member changes accordingly, so that the position of the mirror 521 on the support frame 20 changes. It should be noted that, the number of the adjusting elements and the elastic components is not limited in the embodiments of the present invention, and those skilled in the art can adjust the number according to actual needs.

In the example shown in fig. 5, the adjusting unit includes two adjusting elements 541-1 and 541-2, and two elastic members 542-1 and 542-2, respectively. Two regulating elements 541-1 and 541-2 are disposed on the first sidewall 20a, and the regulating elements 541-1 and 541-2 are movable relative to the first sidewall 20 a. Two elastic members 542-1 and 542-2 are provided on the second side wall 20b, and when the adjustment elements 541-1 and 541-2 move, the amount of deformation of the elastic members 542-1 and 542-2 changes accordingly, so that the position of the mirror 521 on the support frame 20 changes.

Specifically, two adjustment elements 541-1 and 541-2 are respectively provided at the ends of the mirror 521 in the longitudinal direction, and the elastic members 542-1 and 542-2 are respectively provided at positions corresponding to the adjustment elements 541-1 and 541-2 in the longitudinal direction of the mirror 521. For convenience of explanation, the moving direction of the adjusting elements 541-1 and 541-2 is referred to as a height direction, and the adjustment of the adjusting elements 541-1 and 541-2 is referred to as height adjustment. It is understood that the height adjustment of the adjustment element 541-1 will have a greater effect on the amount of deformation of the elastic member 542-1, and the height adjustment of the adjustment element 541-2 will have a greater effect on the amount of deformation of the elastic member 542-2. Accordingly, the position of the mirror 521 on the support frame 20 is adjusted by the height adjustment of the adjustment elements 541-1 and 541-2. It is noted that the change in the position of the mirror 521 on the support frame 20 includes a change in the displacement of the mirror 521 and/or a change in the angle of the mirror 521.

The corresponding relationship between the displacement and the angle of the mirror 521 after being adjusted by the adjusting elements 541-1 and 541-2 is shown in table one.

Table one:

in an alternative embodiment, in order to facilitate the fixing of the reflector 521, the supporting frame 20 is further provided with a pressing member. The pressing member may press the mirror 521 against the support frame 20. In a specific implementation, the pressing member may be an elastic fixing elastic sheet, and the fixing elastic sheet may press the reflector 521 against the supporting frame 20 through the elastic force, which will be described below with reference to the drawings.

Refer to fig. 6, which is a schematic structural diagram of a fixing clip according to an embodiment of the present invention. The fixing elastic sheet 53 may be fixed on the supporting frame 20, and the fixing elastic sheet 53 presses the reflector 521 against the supporting frame 20 by an elastic force. The fixing spring 53 includes a first elastic arm 531 and a second elastic arm 532. The first elastic arm 531 is used for pressing the first surface of the reflector 521, so as to press the reflector 521 against the support frame 20. In practical applications, the first elastic arm 531 is used for pre-positioning the mirror 521, and within a certain range, the elastic force of the first elastic arm 531 in the direction perpendicular to the first surface of the mirror 521 is smaller than the elastic force of the elastic members 542-1 and 542-2 acting on the second surface of the mirror 521, so that the elastic force of the first elastic arm 531 in the direction perpendicular to the first surface of the mirror 521 does not affect the adjusting blocks 541-1 and 541-2, and the position and the angle of the mirror 521 can still be adjusted through the adjusting blocks 541-1 and 541-2. Wherein the first and second surfaces of the mirror 521 are disposed opposite to each other. The second elastic arm 532 is used for pressing a first side surface of the reflector 521, and pressing a second side surface of the reflector 521 against the support frame 20, where the first side surface and the second side surface are arranged oppositely.

In the embodiment of the present invention, the first surface is a reflecting surface of the reflector 521, and the first side surface and the second side surface are non-reflecting surfaces of the reflector 52. That is, the second elastic arm 532 serves to fix the non-reflection surface direction of the mirror 521. In addition, the second side surface is in inelastic contact with the support frame 20, so that the force applied to the first side surface of the reflector 52 by the second elastic arm 532 can ensure that the reflector 521 is fixed in the direction perpendicular to the first side surface, and the reflector 521 is prevented from falling out.

In an alternative embodiment, the optical scanning unit 111 further has an optical box that accommodates the light source 11, the optical deflector 40, the optical element, the supporting member that is a part of the optical box, the adjusting unit, and the pressing member.

It is understood that when the light source 11 emits a plurality of light beams, the optical scanning unit 111 includes a plurality of sets of mirrors, wherein each set of mirrors includes a corresponding adjusting unit.

In the embodiment of the present invention, the optical scanning unit 111 emits the light beam through the light source 11, and converges the light beam to the polygon mirror 41 of the optical deflector 40 through the first optical unit 30, and the polygon mirror 41 deflects the light beam to the f θ lens 51, and focuses the light beam onto the scanned target surface through the reflection mirrors 521, 522, and 523. It is understood that the optical path of the light beam from the f θ lens 51 to the photosensitive drums 101Y-K is fixed after the optical design of the optical scanning unit 111 is completed, and the positions of the photosensitive drums 101Y-K can be determined by adjusting the positions of the mirrors 521, 522, and 523.

Referring to fig. 7, it is a schematic diagram of an influencing factor of the space toner capacity of the toner cartridge according to an embodiment of the present invention. As shown in fig. 7, the 4 light beams are emitted from the optical scanning unit 111 and reach the corresponding photosensitive drums, and the relationship between the distance L between the light beams between adjacent light paths and the distance H between the light beams from the optical scanning unit 111 and the photosensitive drums determines the toner capacity of the toner cartridge. Therefore, the adjustment of the size of the space toner capacity of the toner cartridge can be realized by adjusting the positions of the mirrors 521, 522 and 523, adjusting the interval L of the light beams between the adjacent light paths, and/or adjusting the distance H from the optical scanning unit 111 to the photosensitive drum.

Referring to fig. 8, a schematic diagram of the adjustment of the space carbon powder capacity of the powder box in the height direction is provided in the embodiment of the present invention. By changing the distance H from the optical scanning unit 111 to the photosensitive drums 101Y to K, the photosensitive drums 101Y to K are positioned closer to or farther from the optical scanning unit 111. If the optical design is designed according to a high-speed large-capacity powder box, the powder box can be adjusted to be a low-speed small-capacity powder box, namely H1< H, under the condition that L is not changed, the powder box space is reduced, and the height of the whole machine is reduced. On the contrary, if the optical design is designed according to the low-speed small-capacity powder box, the powder box can be adjusted to be high-speed large-capacity, and the details are not repeated.

As shown in fig. 8, the optical paths ace and fn are original optical paths. The optical path ace is one of the multiple light beams, and the length of the optical path ace is the total distance from the first reflecting mirror 521 to the photosensitive drum 101C via the second reflecting mirror 522. In the embodiment of the present invention, the optical path ace is adjusted to the optical path abcd by adjusting the position of the first reflecting mirror 521 and/or the second reflecting mirror 522, wherein the original optical path distance is equal to the changed optical path distance, i.e. d (ac) + d (ce) ═ d (ab) + d (bc) + d (cd). As for the optical path fn, the length thereof is the distance from the third mirror 523 to the photosensitive drum 101K. In the embodiment of the present invention, the light path fn is changed to the light path fghm, the third reflecting mirror 523 is removed, the fourth reflecting mirror 524 and the fifth reflecting mirror 525 are added to realize the change, and the positions of the fourth reflecting mirror 524 and the fifth reflecting mirror 525 are adjusted, so that the original light path distance is equal to the changed light path distance, i.e., (fn) ═ d (fg) + d (gh) + d (hf) + d (fm). Two way light paths of the other side of optical scanning unit 111 correspond the adjustment, the embodiment of the utility model provides a no longer describe to this.

The embodiment of the utility model provides an in, through the position of regulating unit adjustment optical element on the supporting component, realize the adjustment of the distance of optical scanning unit 111 to sensitization drum, and then realize the big or small adjustment of the space carbon dust capacity of powder box.

Referring to fig. 9, a schematic diagram of the adjustment of the space carbon powder capacity of the powder box in the mutual spacing direction is provided in the embodiment of the present invention. The embodiment of the utility model provides an in, can change the space carbon dust capacity size of powder box through changing the interval between the powder box. In general, changing the distance L between the photosensitive drums 101Y-K, the spacing distance between the photosensitive drums 101Y-K becomes larger or smaller. If the optical design is designed according to a high-speed large-capacity powder box, the powder box can be adjusted to be low-speed small-capacity, namely L1< L, under the condition that H is not changed, the space carbon powder capacity of the powder box is reduced, and the front-back distance of the whole machine is reduced. On the contrary, if the optical design is designed according to the low-speed small-capacity powder box, the powder box can be adjusted to be high-speed large-capacity, and the details are not repeated.

As shown in fig. 9, the optical paths abce and ghm are original optical paths. The optical path abce is one of the multiple beams, and the length of the optical path abce is the total distance from the first reflecting mirror 521 to the photosensitive drum 101C via the second reflecting mirror 522. In the embodiment of the present invention, the optical path abce is adjusted to the optical path adf by adjusting the positions of the first reflecting mirrors 521 to 521-1 and the positions of the second reflecting mirrors 522 to 522-1, wherein the original optical path distance needs to be equal to the changed optical path distance, i.e. d (ab) + d (bc) + d (ce) ═ d (ad) + d (df). For the optical path ghm, the length thereof is the distance from the third mirror 523 to the photosensitive drum 101K. In the embodiment of the present invention, the light path ghm is adjusted to the light path gpbn, and the fourth mirror 524 is added by adjusting the positions of the third mirrors 523 to 523-1, wherein the original light path distance is equal to the changed light path distance, i.e. d (gh) + d (hm) + d (gp) + d (gh) + d (hf) + d (fm). Two way light paths of the other side of optical scanning unit 111 correspond the adjustment, the embodiment of the utility model provides a no longer describe to this.

The embodiment of the utility model provides an in, through the position of regulating unit adjustment optical element on the supporting component, realize the adjustment of the distance between the adjacent sensitization drum, and then realize the big or small adjustment of the space carbon dust capacity of powder box.

Adopt the embodiment of the utility model provides a technical scheme uses the optical scanning unit 111 of same set of optical system when developing high-speed and low-speed image forming device, through the position of adjustment speculum, changes the distance by the scanning target surface of optical scanning unit 111 light beam export sensitization drum, realizes the carbon powder capacity differentiation demand of powder box. In addition, for an image forming device with a plurality of powder boxes, such as a color laser printing device, the distance between two photosensitive drums can be changed by adjusting the positions of the reflecting mirrors, and the capacity difference requirement of the powder boxes is met.

That is, when a new printing device product is developed, the existing optical system can be utilized, and the distance between the two photosensitive drums and the distance value from the light beam outlet of the optical scanning unit 111 to the scanned target surface of the photosensitive drum can be adjusted according to the toner capacity of the toner cartridge and the layout design of the whole printing device, so that the development cost and the development risk can be reduced.

Corresponding to the optical scanning unit 111, the embodiment of the present invention further provides an image forming apparatus 100, where the image forming apparatus 100 includes the optical scanning unit 111 of the above embodiment, and a photosensitive drum cooperating with the optical scanning unit 111, and a light beam emitted from the optical scanning unit 111 forms an electrostatic latent image on a surface of a scanned target of the photosensitive drum; the developing device develops the electrostatic latent image to form a carbon powder image; the transfer printing device transfers the carbon powder image to a transfer printing medium; and a fixing device for fixing the transferred carbon powder image on the transfer medium.

For details of the image forming apparatus, reference may be made to the description of the foregoing embodiments, which are not repeated herein.

In the embodiments of the present invention, "at least one" means one or more, "and" a plurality "means two or more. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and may mean that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

Those of ordinary skill in the art will appreciate that the various elements and algorithm steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, computer software, or combinations of electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

The above description is only for the specific embodiments of the present invention, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An optical scanning unit, comprising:

a light source for emitting a light beam;

an optical deflector for deflecting the light beam emitted from the light source;

an optical element for directing the light beam deflected by the optical deflector onto a scanned target surface;

a support member that supports an end portion in a longitudinal direction of the optical element;

an adjustment unit that adjusts a position of the optical element on the support member;

the adjusting unit comprises an adjusting element and an elastic component, the elastic component is arranged between the optical element and the supporting component, the adjusting element acts on the optical element, and the position of the optical element on the supporting component is changed by the corresponding change of the deformation of the elastic component.

2. An optical scanning unit according to claim 1, characterized in that said support member comprises a first side wall and a second side wall, said first side wall being disposed opposite to said second side wall.

3. The optical scanning unit according to claim 2, wherein said adjustment unit is provided at a longitudinal end of said optical element, said adjustment element is provided on said first side wall, said adjustment element is movable relative to said first side wall, said elastic member is provided on said second side wall, and when said adjustment element is moved, a corresponding change in deformation amount of said elastic member changes a position of said optical element on said support member.

4. An optical scanning unit according to claim 1, further comprising a pressing member that presses the optical element against the supporting member.

5. The optical scanning unit according to claim 4, wherein the pressing member is a fixed spring that presses the optical element against the supporting member by an elastic force.

6. The optical scanning unit of claim 5, wherein the fixing spring comprises a first elastic arm, the first elastic arm presses against the first surface of the optical element to press the optical element against the supporting member, and an elastic force of the first elastic arm in a direction perpendicular to the first surface of the optical element is smaller than an elastic force of the elastic member acting on the second surface of the optical element.

7. The optical scanning unit of claim 6, wherein the fixing spring comprises a second elastic arm, the second elastic arm presses against a first side surface of the optical element and presses against a second side surface of the optical element on the supporting member, and the first side surface and the second side surface are arranged oppositely.

8. The optical scanning unit according to claim 4, characterized in that the optical scanning unit further has an optical box that accommodates the light source, the optical deflector, the optical element, the support member, the adjustment unit, and the pressing member, the support member being a part of the optical box.

9. An optical scanning unit according to claim 1, characterized in that said optical element is a mirror reflecting said light beam and/or an optical lens through which said light beam passes.

10. An image forming apparatus comprising the optical scanning unit according to any one of claims 1 to 9, and a photosensitive drum cooperating with the optical scanning unit, wherein the light beam emitted from the optical scanning unit forms an electrostatic latent image on a photosensitive surface of the photosensitive drum;

the developing device develops the electrostatic latent image to form a carbon powder image;

the transfer printing device transfers the carbon powder image to a transfer printing medium;

and a fixing device for fixing the transferred carbon powder image on the transfer medium.

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