JP2007072321A - Image forming apparatus and exposure head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus where the light emitting surface of an exposure head is easily cleaned and the occurrence of image irregularity caused by the soiling of the light emitting surface is restrained, and to provide the exposure head. <P>SOLUTION: An LED printing head 30 is constituted by attaching a cleaning mechanism 80 to a head main body 31. The cleaning mechanism 80 includes a cleaning pad 80B functioning as a cleaning member at the edge of an operation rod 80A, and performs cleaning by moving along a guide groove 37 formed on the side surface of the head main body 31 and making the cleaning pad 80B abut on the light exit surface 38 being the upper surface of a rod lens array 33. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image forming apparatus such as an electrophotographic copying machine and a printer, and an exposure head for exposing a photosensitive member thereof.

In an image forming apparatus such as a copying machine or a printer using an electrophotographic method, for example, a drum-shaped photosensitive member is uniformly charged, and the photosensitive member is exposed by an exposure unit controlled based on image information. An electrostatic latent image is formed on the photoconductor. The electrostatic latent image is developed with toner by a developing device to form a toner image. The toner image is transferred to a recording sheet and then fixed to obtain an image.
As one of exposure means in such an image forming apparatus, an exposure head such as an LED print head using an LED array in which a number of light emitting diodes (LEDs) are linearly arranged is known. Since the LED does not require a mechanical drive mechanism and does not require a backlight like a liquid crystal element, the image forming apparatus can be reduced in size and power can be saved.

  By the way, since the exposure unit of the image forming apparatus exposes the photosensitive member between the charger and the developing unit, in an image forming apparatus using an exposure head such as an LED print head, the exposure head is necessarily disposed in the vicinity of the developing unit. Is done. As a result, there is a problem that the light exit surface of the exposure head is easily contaminated by toner leaking from the developing device. If the light exit surface is soiled, the amount of irradiated light is reduced and image unevenness occurs. In view of this, a configuration (see Patent Document 1) that prevents such stains that cause image unevenness and a configuration that cleans the light exit surface (see Patent Document 2) have been proposed.

In the configuration disclosed in Patent Document 1, shielding plates are provided on both front and rear sides of the exposure head (front and rear with respect to the moving direction of the photosensitive member), and a high-pressure holding unit is formed between the light emission surface of the exposure apparatus and the photosensitive member. Is. As a result, the high pressure holding unit is maintained at a higher pressure than the surroundings by the air flow caused by the rotation of the photosensitive member, and the toner cloud is prevented from entering the inside.
Further, the configuration disclosed in Patent Document 2 is provided with a cleaning member that can be brought into sliding contact with the light emitting surface of the exposure head in a charger disposed adjacent to the exposure head, and is cleaned when the charger is pulled out and stored. The light emission surface is to be cleaned by the member.

JP 2004-45795 A Japanese Patent Laid-Open No. 5-286206

However, in the configuration disclosed in Patent Document 1, particularly when an exposure head is arranged on the lower side of the photosensitive member, the exposure head emits irradiation light upward, so that the light emission surface faces upward. As a result, there is a risk that the toner adhering to the shielding plate may fall on the light exit surface due to vibration during operation of the apparatus. Should the toner fall on the light exit surface, the light exit surface will be greatly contaminated. Since the light irradiation surface is close to the photosensitive drum, cleaning is difficult, and the shielding plate is an obstacle to cleaning. Further, since it is necessary to place the tip of the shielding plate close to the photoconductor, there is a risk that the photoconductor will be damaged due to contact with the shielding plate when the photoconductor is replaced.
The configuration disclosed in Patent Document 2 can be applied only to a device using a non-contact charger such as a corona charger.

  The present invention has been made to solve the technical problems as described above, and the object of the present invention is to easily clean the light emission surface of the exposure head. An object of the present invention is to provide an image forming apparatus and an exposure head capable of suppressing the occurrence of image unevenness due to dirt.

  For this purpose, the image forming apparatus of the present invention includes a photosensitive member, an exposure unit that emits irradiation light that exposes the photosensitive member from a light emitting surface that is disposed to face the photosensitive member, and a light emitting surface. A cleaning member for cleaning, a support operation member for supporting the cleaning member, and a guide means for moving and guiding the support operation member. The movement of the support operation member guided by the guide means causes the cleaning member to move on the light emission surface. It is configured to move from a retracted position outside the one end and away from the light exit surface in the height direction, abut against the light exit surface, and move along the light exit surface. To do.

  Here, the support operation member extends from the portion that supports the cleaning member to the upper side of the light emission surface along the light emission surface, and stands with an opening corresponding to the light emission surface and surrounding the opening. And a shielding wall provided. Further, the guide means is provided in the exposure means, for example. Furthermore, the exposure means includes, for example, a light emitting array in which a large number of light emitting elements are arranged in a straight line, and a positioning member for a photoconductor disposed outside the array end of the light emitting array, and a cleaning member The retracted position is set between the arrangement end of the light emitting array and the positioning member.

  An exposure head according to the present invention is an exposure head that is mounted on an image forming apparatus including a photoconductor, and emits irradiation light that exposes the photoconductor from a light emission surface disposed to face the photoconductor. A cleaning member that cleans the surface; a support operation member that supports the cleaning member; and a guide unit that moves and guides the support operation member. The movement of the support operation member guided by the guide unit causes the cleaning member to emit light. It is configured to move from a retracted position outside the one end of the surface and spaced apart from the light exit surface in the height direction, abut against the light exit surface, and move along the light exit surface. Features.

  According to the image forming apparatus and the exposure head of the present invention, the light emission surface of the exposure head can be easily cleaned by the cleaning member, and the occurrence of image unevenness due to contamination of the light emission surface can be suppressed.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a schematic configuration diagram of an image forming apparatus to which an embodiment of the present invention is applied. An image forming apparatus 1 shown in the figure is a so-called tandem type color image forming apparatus. The figure is a view from the side operated by the operator (front side), and maintenance and the like are performed by opening a cover (not shown) that can be opened and closed on the front side. It is. FIG. 2 is an enlarged schematic view of the image forming unit 10.

  The image forming apparatus 1 includes a plurality of image forming units 10 (10Y, 10M, 10C, and 10K) that form toner images of the respective color components by an electrophotographic method, and each image forming unit 10 through a circuit route around each image forming unit 10. The intermediate transfer belt 20 is provided on the upper side in FIG. The secondary transfer unit 40 transfers the toner image on the intermediate transfer belt 20 onto the recording paper P as a transfer material, and the intermediate transfer belt after the toner image is transferred to the recording paper P by the secondary transfer unit 40. 20 is provided with a cleaning device 50 for cleaning the surface of 20 and a fixing device 60 for fixing the toner image on the recording paper P. In addition, the recording paper P stored in the paper tray 71 is transported to the secondary transfer unit 40, transported from the secondary transfer unit 40 to the fixing device 60, and the recording paper P fixed by the fixing device 60 is discharged and transported. A recording paper transport mechanism 70 is provided.

Each of the image forming units 10Y, 10M, 10C, and 10K has the same configuration except for the color of the toner stored in the developing device 14 (see FIG. 2), and is shown as the image forming unit 10 in FIG. . Hereinafter, the image forming unit will be described with reference to FIG.
The image forming unit 10 includes a charging roll 12 that uniformly charges the photosensitive drum 11 around the photosensitive drum 11 as a photosensitive member rotating in the direction of arrow A in FIG. An exposure unit for exposing the photosensitive drum 11 with exposure light controlled based on image information and writing an electrostatic latent image, an LED print head 30 as an exposure head, and an electrostatic latent image on the photosensitive drum 11 A developing device 14 that visualizes the toner image with toner, a primary transfer roll 15 that transfers the toner image formed on the photosensitive drum 11 to the intermediate transfer belt 20, and a drum that removes residual toner on the photosensitive drum 11. Electrophotographic devices such as a cleaner 16 are sequentially disposed. The LED print head 30 is located below the photosensitive drum 11.

The charging roll 12 is configured by laminating conductive rubber or conductive sponge and conductive rubber. A voltage is supplied to the charging roll 12 to uniformly charge the surface of the photosensitive drum 11 with a constant voltage.
The LED print head 30 includes an LED array, and the LED array is provided in parallel with the photosensitive drum 11. Then, irradiation light based on the image data is emitted under the control of a control unit (not shown), the photosensitive member on the surface of the photosensitive drum 11 is main-scanned in the axial direction, and the main scanning and rotation of the photosensitive drum 11 are performed. An electrostatic latent image is formed on the photosensitive drum 11 by the sub-scanning. The configuration of the LED print head 30 will be described in detail later.

The developing device 14 includes a developing housing 14A for storing a developer and a developing roll 14B for carrying and transporting the developer. The developing roll 14B carries the toner stored in the developing housing 14A, supplies the toner to the photosensitive drum 11 while rotating, and forms a toner image in which the electrostatic latent image is visualized. In this embodiment, a toner that is negatively charged is used.
The primary transfer roll 15 is provided to face the photosensitive drum 11 with the intermediate transfer belt 20 interposed therebetween. The conductive rubber or conductive sponge and conductive rubber are laminated, and a voltage having a polarity opposite to the charging polarity of the toner (that is, positive polarity in the present embodiment) is applied. Then, the toner image formed on the photosensitive drum 11 by the potential difference is transferred to the intermediate transfer belt 20.

The intermediate transfer belt 20 is formed into an endless belt having a thickness of, for example, 0.1 mm and a predetermined width by using a material in which a conductive agent such as carbon black as a conductive agent is contained in a resin such as polyimide. The volume resistivity is set to 10 ⁶ to 10 ¹⁴ Ω · cm.
Then, it is wound around the drive roll 21, the tension roll 22 that applies a constant tension to the intermediate transfer belt 20 and defines the path, and the backup roll 42 of the secondary transfer unit 40, and is defined by these rolls. It is provided so that it may go around in the route which was made.
The drive roll 21 is connected to a motor (not shown), and is driven to rotate by the motor to drive the intermediate transfer belt 20 in a circular manner.
The circulation path of the intermediate transfer belt 20 is horizontal on the lower side corresponding to each image forming unit 10 (10Y, 10M, 10C, 10K).

The secondary transfer unit 40 includes a backup roll 42 and a secondary transfer roll 41 that faces the backup roll 42 with the intermediate transfer belt 20 interposed therebetween. A voltage having a polarity (positive polarity) opposite to the charging polarity of the toner is applied to the secondary transfer roll 41, whereby the toner image carried by the intermediate transfer belt 20 is transferred to the recording paper P.
The fixing device 60 includes a heated heat roll 61 and a pressure roll 62 provided to face the heat roll 61. The pressure roll 62 presses the recording paper P against the heated heat roll 61 and fixes the toner image on the recording paper P by heating and pressing.

  The recording paper transport mechanism 70 includes a paper tray 71 for storing the recording paper P, a pickup roll 72 for taking out and transporting the recording paper P stored in the paper tray 71, and several transport rolls for transporting the recording paper P. 73. Then, the recording paper P stored in the paper tray 71 is picked up by the pickup roll 72 at a predetermined timing, and is transported to the secondary transfer section 40 by the transport roll 73 and from the secondary transfer section 40 to the fixing device 60.

The image forming apparatus 1 acts as follows to form an image on the recording paper P.
That is, the toner images of the respective color components formed by the respective image forming units 10 are sequentially transferred (primary transfer) onto the intermediate transfer belt 20 that is driven to rotate (rotate). Then, the superimposed image held on the intermediate transfer belt 20 is collectively transferred (secondary transfer) by the secondary transfer unit 40 onto the recording paper P conveyed by the recording paper conveyance mechanism 70. Thereafter, the image secondarily transferred to the recording paper P is fixed by the fixing device 60 and discharged. On the other hand, the portion of the intermediate transfer belt 20 after the toner image carried by the secondary transfer unit 40 is transferred to the recording paper P moves to a position corresponding to the cleaning device 50, and the remaining toner is removed. .

Next, the LED print head 30 which is a main part of the present embodiment will be described.
3 is a partially omitted perspective view of the LED print head 30, and FIG. 4 is an enlarged sectional view thereof. FIG. 5 is a perspective view in which the cleaning mechanism 80 is separated from the head body 31 and the cleaning mechanism 80 is disassembled.
The LED print head 30 is configured by including a cleaning mechanism 80 in the head main body 31.
The head main body 31 is provided with a short mounting portion 31B extending at both ends of the element housing portion 31A, and has a slender rectangular shaft-like appearance as a whole. Further, guide grooves 37 as guide means for guiding the movement of the cleaning mechanism 80 are formed on both the left and right side surfaces.

As shown in FIG. 4, the element housing portion 31 </ b> A includes an LED array 32 as a light emitting array and a rod lens array 33 that forms an image of light emitted from the LED array 32.
The LED array 32 includes a plurality of light emitting diodes (LEDs) as light emitting elements arranged in a straight line on the LED substrate 32A. And it is being fixed to the upper surface of the support base 34 via this LED board 32A.
The rod lens array 33 is configured by arranging a large number of rod lenses in a straight line so as to correspond to the LEDs of the LED array 32. And it is hold | maintained by the housing 35 fixed to the support base 34, and is provided above the LED array 32. FIG. The upper surface protrudes from the upper surface of the housing 35 by a predetermined amount, and the upper surface of the LED array 32 is a light emitting surface 38 that emits irradiation light from the LED print head 30.

The housing 35 has a triangular cross-sectional shape with a flat surface (upper surface) at the top, and is fixed to the support base 34 at the bottom. The rod lens array 33 is held at a predetermined position by the upper surface portion, covers the rod lens array 33, and forms an accommodation space for the rod lens array 33 and the LED array 32.
The mounting portions 31B at the front and rear ends of the head main body 31 are formed by projecting the support base 34 toward the front and rear sides from the element housing portion 31A. On the upper surface, a positioning projection 31C is provided as a positioning member for positioning the LED print head 30 when the LED print head 30 is mounted on the image forming apparatus 1 (see FIG. 1).

The cleaning mechanism 80 includes a cleaning pad 80B as a cleaning member at the tip of an operation rod 80A as a support operation member. Then, it is provided on the upper side of the head body 31 in a superposed manner.
The operating rod 80A has a planar shape substantially corresponding to the planar shape of the head main body 31, and an opening 81 corresponding to the element accommodating portion 31A of the head main body 31 is formed at the center of the plane. An engaging portion 82 that engages with the head main body 31 is formed at the tip. Further, the proximal end on the front side is a stepped operation portion 83 corresponding to the mounting portion 31 </ b> B of the head body 31.
A shielding wall 84 is erected on the periphery of the opening 81. The height is such that the LED print head 30 is mounted on the image forming apparatus 1 (see FIG. 1), and the upper edge is a narrow gap (see FIG. 2 and FIGS. 6 and 7 to be described later) narrow ( For example, 0.5 mm).

The engaging portion 82 includes arm portions 82A that are respectively suspended from the left and right sides of the operating rod 80A, and an engaging protrusion 82B projects from the inside of the tip of the arm portion 82A. The engagement protrusion 82B is movably fitted in a guide groove 37 formed on the side surface of the head body 31.
A cleaning pad 80B is provided on the lower surface of the operation rod 80A between the arm portions 82A. The cleaning pad 80B is a block having a predetermined thickness and size formed of, for example, a nonwoven fabric, and is adhesively fixed to the lower surface of the operation rod 80A.

The operation rod 80 </ b> A configured as described above is attached to the head main body 31 with the engaging protrusions 82 </ b> B of the engaging portions 82 fitted in the guide grooves 37 formed on the side surfaces of the head main body 31.
Here, as shown in FIGS. 3 and 5, the guide groove 37 formed on the side surface of the head body 31 has a predetermined groove on the top surface of the element housing portion 31A except for the separation / contact path portion 37A in a predetermined range at the tip. The head main body 31 is formed over substantially the entire length in parallel at intervals. The tip separation / contact path portion 37 </ b> A is formed obliquely at a predetermined angle so that the leading edge is the highest. Therefore, when the engagement protrusion 82B of the engagement portion 82 moves in the separation path portion 37A, the interval between the operation rod 80A and the head body 31 changes. Then, the operating rod 80A is most spaced apart from the head body 31 in a state where the engaging projection 82B is positioned at the most distal end portion of the separating / connecting path portion 37A.

  The operation rod 80A is superposed on the upper side of the head body 31 as shown in FIG. 3 in a state where the engaging projection 82B is located at the forefront of the guide groove 37 (that is, the forefront of the separation path portion 37A). The opening 81 coincides with the element accommodating portion 31A and does not block the irradiation light from the element accommodating portion 31A. In addition, the proximal-side operation unit 83 is positioned above the mounting unit 31B. This state is a normal state, and is usually in this state (during image formation or the like).

FIG. 6 shows the tip portion of the LED print head 30 in this normal state, and is a view in which only the operating rod 80A is shown in cross section. 7 is a view showing a state in which the operating rod 80A is pulled out from the state of FIG. 6 until the engaging projection 82B reaches the horizontal portion of the guide groove 37. As shown in FIG.
As shown in FIG. 6, in the normal state, the cleaning pad 80B attached to the lower surface of the distal end of the operation rod 80A is located between the end of the light emitting surface 38 of the element housing portion 31A and the positioning protrusion 31C. It is located a predetermined amount apart from the upper surface of the accommodating portion 31A. This position is the retracted position of the cleaning pad 80B.

  From the normal state where the cleaning pad 80B is in the retracted position, when the operation rod 80A is moved (pulled toward the front side) while supporting the operation portion 83 (see FIG. 3) at the front end, The engaging protrusion 82 </ b> B moves along the guide groove 37. The operating rod 80A first moves obliquely downward along the separation path 37A, and then moves horizontally. Here, the inclination angle of the contact / separation path 37A of the guide groove 37 is set such that the cleaning pad 80B located at the retreat position separated obliquely above the element housing portion 31A by the movement of the operation rod 80A along the separation / contact path 37A. Is set so as to contact the upper surface (light emitting surface 38) of the rod lens array 33. Accordingly, by pulling out the operation rod 80A, the cleaning pad 80B comes into contact with the upper surface (light emitting surface 38) of the rod lens array 33, and then moves horizontally in that state. is there.

The LED print head 30 configured as described above is fixed to a chassis (not shown) of the image forming apparatus 1 (see FIG. 1) by the mounting portion 31B of the head main body 31, and is provided adjacent to the lower side of the photosensitive drum 11. . The LED array 32 (see FIGS. 3 and 4) emits irradiation light controlled based on the image information, and the rod lens array 33 sensitizes the light emitted by the LED array 32 (see FIGS. 3 and 4). An image is formed on the surface of the body drum 11.
At the time of image formation, the cleaning mechanism 80 is in a normal state, and the operation rod 80A is superposed on the upper side of the head main body 31, and the opening 81 does not coincide with the element accommodating portion 31A and does not block the emitted light. Further, the upper edge of the shielding wall 84 erected on the periphery of the opening 81 is located close to the peripheral surface of the photosensitive drum 11, and toner or the like to the inside of the opening 81 (that is, the element housing portion 31A). Stop intrusion. Thereby, the contamination of the light emission surface 38 can be suppressed.

When the light emission surface 38 is contaminated with toner or the like, the operation rod 83A of the cleaning mechanism 80 is supported and the operation rod 80A is pulled out and inserted back, so that the surface of the rod lens array 33 is removed. A certain light emission surface 38 can be wiped with the cleaning pad 80B to remove the dirt.
That is, by pulling out the operating rod 80A, the cleaning pad 80B, which is in the obliquely retracted position in the normal state, comes into contact with the light emitting surface 38 due to the descent accompanying the pulling operation of the operating rod 80A, and the subsequent operating rod 80A The light emission surface 38 is wiped by the pulling operation to remove the dirt. Further, when returning, the light emission surface 38 is similarly wiped to remove dirt. The cleaning of the light emission surface 38 by pulling out / returning the operation rod 80A can be repeated as necessary.

Further, during this cleaning operation (drawing / returning the operation rod 80A), the shielding wall 84 standing on the periphery of the opening 81 is also lowered due to the lowering of the operation rod 80A. The upper edge of the shielding wall 84 is less likely to come into contact with the photosensitive member on the surface of the photosensitive drum 11 and be damaged.
In other words, according to the LED print head 30 of the present embodiment, even when it is arranged upward with respect to the photosensitive drum 11, dirt on the light emission surface 38 due to a toner cloud or the like generated from an adjacent developing device is caused by the shielding wall 84. In addition, the light emission surface 38 can be wiped with the cleaning pad 80B to remove the contamination by an extremely simple operation of pulling out and inserting back the operation rod 80A even when the light emission surface 38 becomes dirty. . At this time, since the shielding wall 84 is separated from the photosensitive drum 11, the photosensitive member is not damaged.

The present invention is not limited to the above embodiment. For example, a member that guides the movement of the operation rod 80A of the cleaning mechanism 80 (the guide groove 37 formed in the head main body 31 in the present embodiment) is provided on the image forming apparatus main body side to which the head main body 31 is mounted. You can do it.
In the above embodiment, the present invention is applied to a so-called tandem color image forming apparatus. For example, the present invention is applied to a color image forming apparatus using a rotary developing device or a monochrome copying machine. Needless to say, you can.
Further, the exposure unit has been described as an LED print head including an LED array, but the present invention is not limited to this, and the exposure unit may be applied to an exposure head using a liquid crystal shutter linear array. In addition, the present invention may be applied to a light exit window disposed facing a photosensitive drum of an optical system that exposes the photosensitive member by scanning with a polygon mirror or the like.

1 is a schematic configuration diagram of an image forming apparatus to which an embodiment of the present invention is applied. It is a schematic structure enlarged view of an image forming unit. It is a perspective view of a LED print head. It is an expanded sectional view of an LED print head. It is the perspective view which decomposed | disassembled the cleaning mechanism while separating the cleaning mechanism from the head main body. It is a figure which shows the front-end | tip part of the LED print head in a normal state. It is a figure which shows the state which pulled out the operation rod from the state of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Image forming apparatus, 11 ... Photoconductor drum (photoconductor), 20 ... Intermediate transfer belt (image carrier), 30 ... LED print head (exposure means, exposure head), 31C ... Positioning protrusion (positioning member), 32 ... LED array (light emitting array), 37 ... guide groove (guide means), 38 ... light emitting surface, 80 ... cleaning mechanism, 80A ... operating rod (support operating member), 80B ... cleaning pad (cleaning member), 81 ... opening 84, shielding wall

Claims (7)

A photoreceptor,
An exposure unit that emits irradiation light that exposes the photoconductor from a light exit surface that is disposed to face the photoconductor;
A cleaning member for cleaning the light emitting surface;
A support operation member for supporting the cleaning member;
Guidance means for moving and guiding the support operation member,
Due to the movement of the support operation member guided by the guide means, the cleaning member is moved from one end of the light exit surface and from a retracted position spaced apart from the light exit surface in the height direction. An image forming apparatus, wherein the image forming apparatus is configured to abut against the light emission surface and move along the light emission surface.   The support operation member extends from the portion supporting the cleaning member along the light emission surface above the light emission surface, and includes an opening corresponding to the light emission surface, and the opening. The image forming apparatus according to claim 1, further comprising: a shielding wall that is erected so as to surround the image forming apparatus.   The image forming apparatus according to claim 1, wherein the guide unit is provided in the exposure unit. The exposure means includes a light emitting array in which a large number of light emitting elements are arranged in a straight line, and a positioning member for the photoconductor disposed outside the array end of the light emitting array,
4. The image forming apparatus according to claim 2, wherein the retracting position of the cleaning member is set between an arrangement end of the light emitting array and the positioning member. 5. An exposure head that is mounted on an image forming apparatus including a photoconductor and emits irradiation light that exposes the photoconductor from a light emission surface disposed to face the photoconductor,
A cleaning member for cleaning the light emitting surface;
A support operation member for supporting the cleaning member;
Guidance means for moving and guiding the support operation member,
Due to the movement of the support operation member guided by the guide means, the cleaning member is moved from one end of the light exit surface and from a retracted position spaced apart from the light exit surface in the height direction. An exposure head, wherein the exposure head is configured to abut against the light emission surface and move along the light emission surface.   The support operation member extends from the portion supporting the cleaning member along the light emission surface above the light emission surface, and includes an opening corresponding to the light emission surface, and the opening. The exposure head according to claim 5, further comprising: a shielding wall standing upright and surrounding. A light emitting array in which a large number of light emitting elements are arranged in a straight line, and a positioning member for the photoconductor disposed on the outer side of the array end of the light emitting array,
The exposure head according to claim 6, wherein the retracting position of the cleaning member is set between an arrangement end portion of the light emitting array and the positioning member.

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