US20040246453A1 - Laser unit - Google Patents
Laser unit Download PDFInfo
- Publication number
- US20040246453A1 US20040246453A1 US10/456,527 US45652703A US2004246453A1 US 20040246453 A1 US20040246453 A1 US 20040246453A1 US 45652703 A US45652703 A US 45652703A US 2004246453 A1 US2004246453 A1 US 2004246453A1
- Authority
- US
- United States
- Prior art keywords
- seal member
- polygon
- laser unit
- lower housing
- peripheral portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00909—Cleaning arrangements or preventing or counter-acting contamination from dust or the like
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/12—Scanning systems using multifaceted mirrors
- G02B26/121—Mechanical drive devices for polygonal mirrors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/113—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using oscillating or rotating mirrors
- H04N1/1135—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using oscillating or rotating mirrors for the main-scan only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/04—Scanning arrangements
- H04N2201/0402—Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207
- H04N2201/0428—Stabilising the scanning parts; Preventing vibrations
Definitions
- the present invention relates to a laser unit used for image formation in a copying machine or the like. More particularly, the present invention relates to a laser unit capable of preventing vibration of a polygon motor and also capable of preventing dust from entering the inside of a polygon cover.
- FIG. 5 is a sectional view showing an example of a conventional laser unit used for image formation in a copying machine or the like.
- the laser unit 300 has a polygon motor 20 assembled on a lower housing 10 .
- the laser unit 300 further has a polygon mirror 30 , a seal member 80 , and a polygon cover 50 .
- the body of the polygon motor 20 is provided with a motor mounting flange 21 for securing the polygon motor 20 to the lower housing 10 .
- the polygon mirror 30 is attached to the rotating shaft of the polygon motor 20 .
- the motor mounting flange 21 is secured to the lower housing 10 with screws 22 in such a manner that the seal member 80 (FIG.
- each screw 22 is secured to a mounting shaft (not shown) projecting with a predetermined height H from the upper surface of the lower housing 10 .
- the central portion of the seal member 80 is compressed by ⁇ H in the direction of thickness thereof.
- the central portion of the seal member 80 prevents the generation and propagation of vibration of the polygon motor 20 .
- the polygon cover 50 is secured to mounting shafts 15 projecting with a predetermined height H from the upper surface of the lower housing 10 . At this time, the lower peripheral portion of the polygon cover 50 sandwiches the peripheral portion of the seal member 80 between itself and the lower housing 10 to seal the inside of the polygon cover 50 from the outside, thereby preventing dust from entering the inside of the polygon cover 50 .
- the seal member is formed in a single monolithic structure, as shown in FIG. 6, extending continuously from the polygon motor mounting portion to the polygon cover mounting portion. Therefore, if strain is produced in the polygon motor mounting portion by mounting of the polygon motor, the strain has an influence also on the peripheral portion of the seal member. If the polygon cover is mounted in this state, the hermeticity in the polygon cover may be degraded, and strain produced by mounting of the polygon cover may have an influence also on the central portion of the seal member.
- One approach to solve the above-described problem is to separate the central and peripheral portions of the seal member as shown in FIGS. 7A and 7B. With this technique, the amount of strain decreases.
- an object of the present invention is to provide a laser unit using a seal member that can be handled as a single component for both the polygon motor and the polygon cover and that is free from the problem that the central and peripheral portions of the seal member affect each other to produce strain when the seal member is mounted.
- the present invention provides a laser unit comprising a lower housing; a polygon motor secured to the lower housing; a seal member having a central portion and a peripheral portion, the central portion being interposed between a motor mounting flange of the polygon motor and the lower housing, and the peripheral portion extending outside the motor mounting flange; and a polygon cover for covering both the polygon mirror and the polygon motor, the polygon cover being secured at an edge portion thereof to the lower housing in such a manner that the peripheral portion of the seal member is interposed between the edge portion of the polygon cover and the lower housing.
- the seal member is provided with slits at appropriate positions between the central portion and the peripheral portion. The central portion and the peripheral portion are connected to each other by bridging portions formed between the slits.
- FIG. 1 is a sectional view showing an embodiment of the laser unit according to the present invention.
- FIG. 2 is an external view for illustrating in detail a seal member used in the laser unit shown in FIG. 1.
- FIG. 3 is a sectional view showing another embodiment of the laser unit according to the present invention.
- FIG. 4 is an external view for illustrating in detail a seal member used in the laser unit shown in FIG. 3.
- FIG. 5 is a sectional view showing an example of a conventional laser unit.
- FIG. 6 is an external view for illustrating a seal member used in the laser unit shown in FIG. 5.
- FIG. 7 is an external view for illustrating another example of a seal member used in the laser unit shown in FIG. 5.
- FIG. 1 is a sectional view showing an embodiment of the laser unit according to the present invention.
- FIG. 2 is an external view for illustrating in detail a seal member used in the laser unit shown in FIG. 1.
- FIG. 3 is a sectional view showing another embodiment of the laser unit according to the present invention.
- FIG. 4 is an external view for illustrating in detail a seal member used in the laser unit shown in FIG. 3.
- the laser unit shown in FIG. 3 differs from the laser unit shown in FIG. 1 mainly in that it has a seal member with a widened peripheral portion and an upper housing in place of the seal member and the polygon cover of the laser unit in FIG. 1, and that the mounting shafts of the lower housing are altered in design from those of the laser unit in FIG. 1.
- the other features are substantially common to the two laser units.
- the laser unit 100 shown in FIG. 1 is used for image formation in a copying machine or the like.
- the laser unit 100 has a polygon motor 20 assembled on a lower housing 10 .
- the laser unit 100 further has a polygon mirror 30 , a seal member 40 , and a polygon cover 50 .
- the lower housing 10 has a motor mounting hole 11 in a central portion thereof.
- the bottom portion of the polygon motor 20 is fitted in the motor mounting hole 11 .
- the body of the polygon motor 20 is provided with a motor mounting flange 21 for securing the polygon motor 20 to the lower housing 10 .
- the polygon mirror 30 is attached to the rotating shaft of the polygon motor 20 .
- each screw 22 is secured to a mounting shaft (not shown) projecting with a predetermined height H from the upper surface of the lower housing 10 .
- the seal member 40 is quadrangular and has a central portion 41 , a peripheral portion 42 and bridging portions 44 .
- the central portion 41 and the peripheral portion 42 are mostly divided from each other by slits 43 .
- the central portion 41 and the peripheral portion 42 are connected to each other at several points by the bridging portions 44 , which cross the slits 43 .
- the central portion 41 is provided with a motor mounting hole 45 for mounting the motor and also provided with screw mounting holes 46 for mounting the screws 22 .
- a sealing medium having a predetermined elasticity and further having dust-proof and vibration-proof capabilities is used.
- a seal member made of so-called rubber sponge [P-PET (plastic polyethylene terephthalate) or PETP (ISO)] or expanded urethane foam and having a density of the order of 180 ⁇ 40 kg/m 3 and a hardness of the order of 10 ⁇ 5°.
- the material is preferably of the closed-cell type.
- the motor mounting flange 21 sandwiches the central portion 41 of the seal member 40 between itself and the lower housing 10 , and the screws 22 are secured to the lower housing 10 through the respective screw mounting holes 46 .
- the central portion 41 of the seal member 40 is compressed by “ ⁇ H” in the thickness direction because the thickness thereof is “H+ ⁇ H”, and secured in the compressed state.
- the polygon cover 50 is placed over the polygon motor 20 and secured with screws 51 to the mounting shafts 15 projecting with a predetermined height H from the upper surface of the lower housing 10 .
- the lower peripheral portion of the polygon cover 50 sandwiches the peripheral portion 42 of the seal member between itself and the lower housing 10 to seal the inside of the polygon cover 50 from the outside, thereby preventing dust from entering the inside of the polygon cover 50 .
- the peripheral portion 42 of the seal member 40 is compressed by “ ⁇ H” in the thickness direction, and secured in the compressed state.
- both the central portion 41 and the peripheral portion 42 of the seal member 40 are compressed by a predetermined amount. Therefore, the seal member 40 is capable of preventing the generation and transmission of vibration of the polygon motor 30 and also capable of surely preventing dust from entering the inside of the polygon cover 50 . Further, the seal member 40 is separated into the central portion 41 and the peripheral portion 42 , which are connected to each other only at the bridging portions 44 . Therefore, it is possible to minimize the mutual transmission of strain produced in the central portion 41 and the peripheral portion 42 during the mounting process. On the other hand, the central portion 41 and the peripheral portion 42 are connected to each other by the bridging portions 44 . Therefore, the seal member 40 can be handled as a single component, which is very convenient.
- the central portion 41 and the peripheral portion 42 of the seal member 40 have the same thickness with a view to facilitating the processing operation.
- a molding process using a mold should preferably be carried out.
- double-sided adhesive tape may be applied to at least one side of the seal member to further facilitate the assembling process.
- Mylar sheet with the same configuration as that of the seal member should be attached to one side of the seal member that faces the lower housing for reinforcing purposes.
- a laser unit 200 shown in FIG. 3 differs from the laser unit shown in FIG. 1 mainly in that it uses a seal member 60 with a widened peripheral portion and an upper housing 70 in place of the seal member and the polygon cover used in the laser unit in FIG. 1, and that the mounting shafts of the lower housing 90 are altered in position from those of the laser unit in FIG. 1.
- the other features are substantially common to the two laser units.
- the embodiment of the present invention discloses a laser unit having a polygon mirror and a polygon motor equipped with the polygon mirror and a motor mounting flange, wherein the motor mounting flange is secured to a lower housing in such a manner that a central portion of a seal member comprising an elastic member is sandwiched between the motor mounting flange and the lower housing.
- a polygon cover for sealing the polygon mirror attached to the polygon motor from the outside is secured to the lower housing in such a manner that a peripheral portion of the seal member is sandwiched between the polygon cover and the lower housing, thereby preventing vibration of the polygon motor and also preventing dust from entering the inside of the polygon cover.
- the central and peripheral portions of the seal member are separated from each other by slits except at several points where the central and peripheral portions are connected to each other by bridging portions.
- the laser unit according to the present invention is arranged as stated above. That is, the central and peripheral portions of the seal member are separated from each other by the slits. Therefore, the central portion and the peripheral portion do not affect each other much when the seal member is mounted. Accordingly, strain is unlikely to occur.
- the seal member can be handled as a single component, which is very convenient. Hence, it is possible to prevent the generation and propagation of vibration of the polygon motor and also prevent dust from entering the inside of the polygon cover.
Abstract
The present invention provides a laser unit using a seal member whose central and peripheral portions will not affect each other to produce strain during mounting and which can be handled as a single component.
In the laser unit 100 according to the present invention, a central portion 41 and a peripheral portion 42 of a seal member 40 used are separated from each other by slits 43. Therefore, when the seal member 40 is mounted, the central and peripheral portions will not affect each other to increase strain. In addition, because the central and peripheral portions are connected to each other at several points by bridging portions 44, the seal member 40 can be handled as a single component, which is very convenient.
Description
- 1. Field of the Invention
- The present invention relates to a laser unit used for image formation in a copying machine or the like. More particularly, the present invention relates to a laser unit capable of preventing vibration of a polygon motor and also capable of preventing dust from entering the inside of a polygon cover.
- 2. Description of the Related Art
- FIG. 5 is a sectional view showing an example of a conventional laser unit used for image formation in a copying machine or the like. The
laser unit 300 has apolygon motor 20 assembled on alower housing 10. Thelaser unit 300 further has apolygon mirror 30, aseal member 80, and apolygon cover 50. The body of thepolygon motor 20 is provided with amotor mounting flange 21 for securing thepolygon motor 20 to thelower housing 10. Thepolygon mirror 30 is attached to the rotating shaft of thepolygon motor 20. Themotor mounting flange 21 is secured to thelower housing 10 withscrews 22 in such a manner that the seal member 80 (FIG. 6; thickness=H+ΔH) disposed on thelower housing 10 is sandwiched between themotor mounting flange 21 and thelower housing 10. In this case, eachscrew 22 is secured to a mounting shaft (not shown) projecting with a predetermined height H from the upper surface of thelower housing 10. The central portion of theseal member 80 is compressed by ΔH in the direction of thickness thereof. The central portion of theseal member 80 prevents the generation and propagation of vibration of thepolygon motor 20. Thepolygon cover 50 is secured to mountingshafts 15 projecting with a predetermined height H from the upper surface of thelower housing 10. At this time, the lower peripheral portion of the polygon cover 50 sandwiches the peripheral portion of theseal member 80 between itself and thelower housing 10 to seal the inside of thepolygon cover 50 from the outside, thereby preventing dust from entering the inside of thepolygon cover 50. - In the above-described conventional laser unit, the seal member is formed in a single monolithic structure, as shown in FIG. 6, extending continuously from the polygon motor mounting portion to the polygon cover mounting portion. Therefore, if strain is produced in the polygon motor mounting portion by mounting of the polygon motor, the strain has an influence also on the peripheral portion of the seal member. If the polygon cover is mounted in this state, the hermeticity in the polygon cover may be degraded, and strain produced by mounting of the polygon cover may have an influence also on the central portion of the seal member. One approach to solve the above-described problem is to separate the central and peripheral portions of the seal member as shown in FIGS. 7A and 7B. With this technique, the amount of strain decreases. However, the handling and assembly of the seal member are troublesome because it comprises two separate parts. In another conventional example, vibration prevention for the polygon motor is made, but dust prevention for the polygon mirror is effected simply by bringing the polygon cover into close contact with the frame, without using a seal member, as in the invention disclosed in Japanese Patent Application Unexamined Publication (KOKAI) No. Hei 11-245442.
- The present invention was made to solve the above-described problems. Accordingly, an object of the present invention is to provide a laser unit using a seal member that can be handled as a single component for both the polygon motor and the polygon cover and that is free from the problem that the central and peripheral portions of the seal member affect each other to produce strain when the seal member is mounted.
- To solve the above-described problem, the present invention provides a laser unit comprising a lower housing; a polygon motor secured to the lower housing; a seal member having a central portion and a peripheral portion, the central portion being interposed between a motor mounting flange of the polygon motor and the lower housing, and the peripheral portion extending outside the motor mounting flange; and a polygon cover for covering both the polygon mirror and the polygon motor, the polygon cover being secured at an edge portion thereof to the lower housing in such a manner that the peripheral portion of the seal member is interposed between the edge portion of the polygon cover and the lower housing. The seal member is provided with slits at appropriate positions between the central portion and the peripheral portion. The central portion and the peripheral portion are connected to each other by bridging portions formed between the slits.
- FIG. 1 is a sectional view showing an embodiment of the laser unit according to the present invention.
- FIG. 2 is an external view for illustrating in detail a seal member used in the laser unit shown in FIG. 1.
- FIG. 3 is a sectional view showing another embodiment of the laser unit according to the present invention.
- FIG. 4 is an external view for illustrating in detail a seal member used in the laser unit shown in FIG. 3.
- FIG. 5 is a sectional view showing an example of a conventional laser unit.
- FIG. 6 is an external view for illustrating a seal member used in the laser unit shown in FIG. 5.
- FIG. 7 is an external view for illustrating another example of a seal member used in the laser unit shown in FIG. 5.
- Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view showing an embodiment of the laser unit according to the present invention. FIG. 2 is an external view for illustrating in detail a seal member used in the laser unit shown in FIG. 1. FIG. 3 is a sectional view showing another embodiment of the laser unit according to the present invention. FIG. 4 is an external view for illustrating in detail a seal member used in the laser unit shown in FIG. 3. The laser unit shown in FIG. 3 differs from the laser unit shown in FIG. 1 mainly in that it has a seal member with a widened peripheral portion and an upper housing in place of the seal member and the polygon cover of the laser unit in FIG. 1, and that the mounting shafts of the lower housing are altered in design from those of the laser unit in FIG. 1. The other features are substantially common to the two laser units.
- The
laser unit 100 shown in FIG. 1 is used for image formation in a copying machine or the like. Thelaser unit 100 has apolygon motor 20 assembled on alower housing 10. Thelaser unit 100 further has apolygon mirror 30, aseal member 40, and apolygon cover 50. Thelower housing 10 has amotor mounting hole 11 in a central portion thereof. The bottom portion of thepolygon motor 20 is fitted in themotor mounting hole 11. The body of thepolygon motor 20 is provided with amotor mounting flange 21 for securing thepolygon motor 20 to thelower housing 10. Thepolygon mirror 30 is attached to the rotating shaft of thepolygon motor 20. Themotor mounting flange 21 is secured to thelower housing 10 withscrews 22 in such a manner that the central portion of the seal member 40 (see FIG. 2; thickness=H+ΔH) disposed on thelower housing 10 is sandwiched between themotor mounting flange 21 and thelower housing 10. In this case, eachscrew 22 is secured to a mounting shaft (not shown) projecting with a predetermined height H from the upper surface of thelower housing 10. - As shown in FIG. 2, the
seal member 40 is quadrangular and has acentral portion 41, aperipheral portion 42 andbridging portions 44. Thecentral portion 41 and theperipheral portion 42 are mostly divided from each other byslits 43. However, thecentral portion 41 and theperipheral portion 42 are connected to each other at several points by the bridgingportions 44, which cross theslits 43. Thecentral portion 41 is provided with amotor mounting hole 45 for mounting the motor and also provided withscrew mounting holes 46 for mounting thescrews 22. As theseal member 40, a sealing medium having a predetermined elasticity and further having dust-proof and vibration-proof capabilities is used. For example, it is preferable to use a seal member made of so-called rubber sponge [P-PET (plastic polyethylene terephthalate) or PETP (ISO)] or expanded urethane foam and having a density of the order of 180±40 kg/m3 and a hardness of the order of 10±5°. The material is preferably of the closed-cell type. - As has been stated above, the
motor mounting flange 21 sandwiches thecentral portion 41 of theseal member 40 between itself and thelower housing 10, and thescrews 22 are secured to thelower housing 10 through the respectivescrew mounting holes 46. In this case, thecentral portion 41 of theseal member 40 is compressed by “ΔH” in the thickness direction because the thickness thereof is “H+ΔH”, and secured in the compressed state. Next, thepolygon cover 50 is placed over thepolygon motor 20 and secured withscrews 51 to the mountingshafts 15 projecting with a predetermined height H from the upper surface of thelower housing 10. Consequently, the lower peripheral portion of thepolygon cover 50 sandwiches theperipheral portion 42 of the seal member between itself and thelower housing 10 to seal the inside of thepolygon cover 50 from the outside, thereby preventing dust from entering the inside of thepolygon cover 50. In this case also, when thepolygon cover 50 is secured to thelower housing 10 with thescrews 51, theperipheral portion 42 of theseal member 40 is compressed by “ΔH” in the thickness direction, and secured in the compressed state. - Thus, both the
central portion 41 and theperipheral portion 42 of theseal member 40 are compressed by a predetermined amount. Therefore, theseal member 40 is capable of preventing the generation and transmission of vibration of thepolygon motor 30 and also capable of surely preventing dust from entering the inside of thepolygon cover 50. Further, theseal member 40 is separated into thecentral portion 41 and theperipheral portion 42, which are connected to each other only at the bridgingportions 44. Therefore, it is possible to minimize the mutual transmission of strain produced in thecentral portion 41 and theperipheral portion 42 during the mounting process. On the other hand, thecentral portion 41 and theperipheral portion 42 are connected to each other by the bridgingportions 44. Therefore, theseal member 40 can be handled as a single component, which is very convenient. Further, because the securing process is carried out by using screws, double-sided adhesive tape is not needed. Thus, the process is facilitated. In this example, thecentral portion 41 and theperipheral portion 42 of theseal member 40 have the same thickness with a view to facilitating the processing operation. However, if it is desired to vary the thickness of theseal member 40 at thecentral portion 41 and theperipheral portion 42 from the structural point of view, a molding process using a mold should preferably be carried out. Although it has been stated above that the foregoing arrangement allows the laser unit to be assembled without the need of double-sided adhesive tape, it is a matter of course that double-sided adhesive tape may be applied to at least one side of the seal member to further facilitate the assembling process. Further, it is also preferable that Mylar sheet with the same configuration as that of the seal member should be attached to one side of the seal member that faces the lower housing for reinforcing purposes. - Another embodiment of the present invention will be described below with reference to FIGS. 3 and 4. A
laser unit 200 shown in FIG. 3 differs from the laser unit shown in FIG. 1 mainly in that it uses aseal member 60 with a widened peripheral portion and anupper housing 70 in place of the seal member and the polygon cover used in the laser unit in FIG. 1, and that the mounting shafts of thelower housing 90 are altered in position from those of the laser unit in FIG. 1. The other features are substantially common to the two laser units. - It has been set that when the
upper housing 70 is secured to thelower housing 90 by mounting means (not shown), the space between the lower end of apartition 71 of theupper housing 70 and the surface of thelower housing 90 will be “H”. The thickness of aseal member 60 shown in FIG. 4 and the configuration of acentral portion 61 thereof are the same as in the case of theseal member 40 shown in FIG. 2 and thecentral portion 41 thereof. However, aperipheral portion 62 of theseal member 60 is widened in accordance with the thickness of thepartition 71 of theupper housing 70. The function performed by theseal member 60 and theupper housing 70 is the same as in the case of FIG. 1. - As has been stated above, the embodiment of the present invention discloses a laser unit having a polygon mirror and a polygon motor equipped with the polygon mirror and a motor mounting flange, wherein the motor mounting flange is secured to a lower housing in such a manner that a central portion of a seal member comprising an elastic member is sandwiched between the motor mounting flange and the lower housing. Further, a polygon cover for sealing the polygon mirror attached to the polygon motor from the outside is secured to the lower housing in such a manner that a peripheral portion of the seal member is sandwiched between the polygon cover and the lower housing, thereby preventing vibration of the polygon motor and also preventing dust from entering the inside of the polygon cover. The central and peripheral portions of the seal member are separated from each other by slits except at several points where the central and peripheral portions are connected to each other by bridging portions.
- The laser unit according to the present invention is arranged as stated above. That is, the central and peripheral portions of the seal member are separated from each other by the slits. Therefore, the central portion and the peripheral portion do not affect each other much when the seal member is mounted. Accordingly, strain is unlikely to occur. In addition, because the central and peripheral portions are connected to each other at several points by the bridging portions, the seal member can be handled as a single component, which is very convenient. Hence, it is possible to prevent the generation and propagation of vibration of the polygon motor and also prevent dust from entering the inside of the polygon cover.
Claims (5)
1. A laser unit comprising:
a lower housing;
a polygon motor secured to said lower housing;
a seal member having a central portion and a peripheral portion, said central portion being interposed between a motor mounting flange of said polygon motor and said lower housing, and said peripheral portion extending outside said motor mounting flange; and
a polygon cover for covering both said polygon mirror and said polygon motor, said polygon cover being secured at an edge portion thereof to said lower housing in such a manner that said peripheral portion of said seal member is interposed between the edge portion of said polygon cover and said lower housing;
wherein said seal member is provided with slits at appropriate positions between said central portion and said peripheral portion, said central portion and said peripheral portion being connected to each other by bridging portions formed between said slits.
2. A laser unit according to claim 1 , wherein said seal member is an elastic member.
3. A laser unit according to claim 1 , wherein said seal member is formed from rubber sponge.
4. A laser unit according to claim 3 , wherein said seal member has a density of 180±30 kg/m3 and a hardness of 10±5°.
5. A laser unit according to claim 3 , wherein said seal member has double-sided adhesive tape for mounting applied to at least one side thereof.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/456,527 US20040246453A1 (en) | 2003-06-09 | 2003-06-09 | Laser unit |
US11/412,974 US7379086B2 (en) | 2003-06-09 | 2006-04-28 | Polygon mirror unit having a seal member with slits positioned between a central portion and a peripheral portion |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/456,527 US20040246453A1 (en) | 2003-06-09 | 2003-06-09 | Laser unit |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/412,974 Continuation US7379086B2 (en) | 2003-06-09 | 2006-04-28 | Polygon mirror unit having a seal member with slits positioned between a central portion and a peripheral portion |
Publications (1)
Publication Number | Publication Date |
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US20040246453A1 true US20040246453A1 (en) | 2004-12-09 |
Family
ID=33490189
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/456,527 Abandoned US20040246453A1 (en) | 2003-06-09 | 2003-06-09 | Laser unit |
US11/412,974 Expired - Fee Related US7379086B2 (en) | 2003-06-09 | 2006-04-28 | Polygon mirror unit having a seal member with slits positioned between a central portion and a peripheral portion |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/412,974 Expired - Fee Related US7379086B2 (en) | 2003-06-09 | 2006-04-28 | Polygon mirror unit having a seal member with slits positioned between a central portion and a peripheral portion |
Country Status (1)
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US (2) | US20040246453A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090296179A1 (en) * | 2008-06-03 | 2009-12-03 | Ricoh Company, Limited | Image forming apparatus |
CN101963701A (en) * | 2009-07-24 | 2011-02-02 | 兄弟工业株式会社 | Optical scanner |
JP2017090647A (en) * | 2015-11-10 | 2017-05-25 | 株式会社リコー | Optical scanner and image forming apparatus |
JP2019064266A (en) * | 2018-11-13 | 2019-04-25 | 株式会社リコー | Housing structure, optical scanner and image formation apparatus |
JP2021081461A (en) * | 2019-11-14 | 2021-05-27 | シャープ株式会社 | Optical scanner and image forming apparatus including the same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7207116B2 (en) * | 2019-04-10 | 2023-01-18 | コニカミノルタ株式会社 | Optical writing device and image forming device |
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US4868673A (en) * | 1986-11-14 | 1989-09-19 | Asahi Kogaku Kogyo K.K. | Laser beam scanning device |
JPH11223792A (en) | 1998-02-06 | 1999-08-17 | Canon Inc | Deflection scanning device |
JPH11245442A (en) | 1998-02-27 | 1999-09-14 | Canon Inc | Scanning optical apparatus |
JP3568399B2 (en) * | 1998-09-24 | 2004-09-22 | 株式会社リコー | Optical scanning device and image forming apparatus |
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- 2003-06-09 US US10/456,527 patent/US20040246453A1/en not_active Abandoned
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US6172786B1 (en) * | 1997-09-03 | 2001-01-09 | Konica Corporation | Optical deflection device and image forming apparatus therewith |
US6802910B2 (en) * | 2001-01-09 | 2004-10-12 | Canon Kabushiki Kaisha | Cleaning and remanufacturing methods for developing container |
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US20090296179A1 (en) * | 2008-06-03 | 2009-12-03 | Ricoh Company, Limited | Image forming apparatus |
EP2131226A1 (en) * | 2008-06-03 | 2009-12-09 | Ricoh Company, Limited | Image forming apparatus |
US8004735B2 (en) | 2008-06-03 | 2011-08-23 | Ricoh Company, Limited | Image forming apparatus |
CN101963701A (en) * | 2009-07-24 | 2011-02-02 | 兄弟工业株式会社 | Optical scanner |
JP2017090647A (en) * | 2015-11-10 | 2017-05-25 | 株式会社リコー | Optical scanner and image forming apparatus |
JP2019064266A (en) * | 2018-11-13 | 2019-04-25 | 株式会社リコー | Housing structure, optical scanner and image formation apparatus |
JP2021081461A (en) * | 2019-11-14 | 2021-05-27 | シャープ株式会社 | Optical scanner and image forming apparatus including the same |
JP7394590B2 (en) | 2019-11-14 | 2023-12-08 | シャープ株式会社 | Optical scanning device and image forming device equipped with the same |
Also Published As
Publication number | Publication date |
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US20060192844A1 (en) | 2006-08-31 |
US7379086B2 (en) | 2008-05-27 |
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