JPH0564819U - Hydrodynamic bearing type optical deflector - Google Patents

Hydrodynamic bearing type optical deflector

Info

Publication number
JPH0564819U
JPH0564819U JP1256092U JP1256092U JPH0564819U JP H0564819 U JPH0564819 U JP H0564819U JP 1256092 U JP1256092 U JP 1256092U JP 1256092 U JP1256092 U JP 1256092U JP H0564819 U JPH0564819 U JP H0564819U
Authority
JP
Japan
Prior art keywords
shaft
fixed
optical deflector
type optical
bearing
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.)
Pending
Application number
JP1256092U
Other languages
Japanese (ja)
Inventor
壮之 三浦
宏 中吉
俊哉 内田
理絵 若島
明義 高橋
Original Assignee
コパル電子株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by コパル電子株式会社 filed Critical コパル電子株式会社
Priority to JP1256092U priority Critical patent/JPH0564819U/en
Publication of JPH0564819U publication Critical patent/JPH0564819U/en
Pending legal-status Critical Current

Links

Abstract

(57) [Abstract] [Purpose] In a hydrodynamic bearing type optical deflector having a structure in which a fixed shaft is supported at both ends, destructive stress on the shaft due to misalignment of the shaft fixing portion due to assembly error is reduced, Moreover, it is intended to maintain the supporting rigidity of the shaft. A radial dynamic pressure bearing portion 20 constructed by loosely inserting a shaft 8 into a hollow cylindrical sleeve 13, and a washer 10 fixed to the end surface of the sleeve 13 and a thrust washer 9 having spiral grooves formed on the end surface. In a hydrodynamic bearing type optical deflector having a thrust bearing portion 21 configured to face each other, one end of the shaft 8 is fixed to the case 3, and the other end is fixed to the mirror cover 2 fixed to the case 3. The structure is such that it is fixed via the O-ring 1 and the gap between the shaft 8 and the mirror cover 2 is filled with the adhesive 19.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of an optical deflector used in an optical device such as a laser printer.

[0002]

[Prior Art]

 Conventionally, the structure shown in FIG. 3 has been proposed as the structure of the dynamic pressure bearing type optical deflector. A radial dynamic pressure bearing portion 20 composed of a hollow cylindrical sleeve 13 and a shaft 8 in which a plurality of herringbone grooves g are engraved on the outer periphery, a washer 10 fixed to one end surface of the sleeve 13 and facing the same. Further, a hydrodynamic bearing is constituted by a thrust bearing portion constituted by a thrust washer 9 having a spiral groove (not shown) formed on one end surface thereof. Further, a hub 14 having a rotary polygon mirror 15 mounted thereon, a main magnet 12 having a multi-pole magnetized outer periphery, a support member 11, and the washer 10 are fixed to the sleeve 13 to form a rotor portion. Further, the case 3 to which one end of the shaft 8 is fixed is fixed to the main magnet 12, the magnetic pole 5 around which the magnet wire 17 is wound, and the substrate 6 on which the Hall element 7 is arranged. A mirror cover 2 having the other end of the shaft 8 fixed to the center was fixed to the shaft.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional structure, in order to prevent the shaft 8 from being broken or vice versa, stress is applied to the shaft 8 more than necessary due to the misalignment between the ends of the shaft 8 due to the assembly error between the case 3 and the mirror cover 2. There is a problem in that the cost is increased due to the high dimensional accuracy of the case 3 and the mirror cover 2.

[0004]

[Means for Solving the Problems]

 The present invention has been made to solve the above-mentioned problems, and as shown in FIG. 1, a radial cylinder constituted by a hollow cylindrical sleeve 13 and a shaft 8 having a plurality of herringbone grooves g formed on the outer periphery thereof. A dynamic bearing portion 20, a thrust bearing portion 21 composed of a washer 10 fixed to one end surface of the sleeve 13 via a support member 11 and a thrust washer 9 having a spiral groove formed on one end surface thereof. In a hydrodynamic bearing type optical deflector equipped with a rotary polygon mirror 15 fixed to the sleeve 13 via a flange-shaped hub 14, one end of the shaft 8 is attached to the case 3. The structure is such that it is fixed and the other end is supported via an O-ring 1 inserted in a mirror cover 2 fixed to the case 3.

Further, in addition to this, the structure is such that an adhesive 19 is filled in the gap between the shaft 8 and the mirror case 2.

[0006]

[Action]

 As described above, according to the present invention, since one end of the shaft 8 is fixed through the O-ring 1, a structure capable of partially absorbing extra stress of the shaft 8 due to misalignment of both ends of the shaft 8 due to an assembly error. Has become.

Further, in the structure of the present invention, as shown in FIG. 2, the end portion of the shaft 8 is supported by filling the gap between the shaft 8 and the mirror cover 2 with the adhesive 19 as compared with the case where only the O-ring 1 is used. The rigidity can be increased, and at the same time, the sealing effect of the O-ring 1 can prevent the adhesive 19 from flowing into the gap between the sleeve 13 and the shaft 8.

[0008]

【Example】

 FIG. 1 is a vertical sectional view showing a first embodiment according to the present invention. A radial dynamic pressure receiving portion 20 composed of a hollow cylindrical sleeve 13 and a shaft 8 having a plurality of herringbone grooves g engraved on the outer periphery thereof, a washer 10 fixed to one end surface of the sleeve 13, and A hydrodynamic bearing is constituted by a thrust bearing portion 21 constituted by a thrust washer 9 facing each other and having a spiral groove (not shown) formed on one end surface thereof. A hub 14 having a rotary polygon mirror 15 mounted thereon, a main magnet 12 having a multi-pole magnetized outer periphery, a support member 11, and the washer 10 are fixed to the sleeve 13 to form a rotor portion. .. Further, the case 3 to which the shaft 8 is fixed is fixed to the main magnet 12, the magnetic pole 5 around which the magnet wire 17 is wound, and the substrate 6 on which the Hall element 7 is arranged. The cover 2 was fixed. Further, one end of the shaft 8 is fixed to the case 3, and the other end is supported via an O-ring 1 inserted in a mirror cover 2 fixed to the case 3.

FIG. 2 shows a second embodiment of the present invention. In addition to the first embodiment, an adhesive 19 is filled in the gap between the shaft 8 and the mirror case 2. ..

As described above, according to the present invention, since one end of the shaft 8 is fixed through the O-ring 1, the extra stress of the shaft 8 due to the misalignment of both ends of the shaft 8 due to an assembly error is partially absorbed. It has a structure that allows it.

Further, in the structure of the present invention, as shown in FIG. 2, by filling the gap between the shaft 8 and the mirror cover 2 with the adhesive 19, the end portion of the shaft 8 is supported more than the case where only the O-ring 1 is used. The rigidity can be increased, and at the same time, the sealing effect of the O-ring 1 can prevent the adhesive 19 from flowing into the gap between the sleeve 13 and the shaft 8.

[0012]

[Effect of the device]

 As described above in detail, in the present invention, in the hydrodynamic bearing type optical deflector of the both-ends supporting structure in which both ends of the shaft are fixed, one end of the shaft is fixed through the O-ring, so that the bearing It is possible to construct an optical deflector that is stable in performance and inexpensive without deteriorating the support rigidity of the section.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.

FIG. 2 is a partial sectional view showing a second embodiment of the present invention.

FIG. 3 is a vertical sectional view showing a conventional example.

[Explanation of symbols]

1 O-ring 2 Mirror cover 3 Case 5 Magnetic pole 6 Substrate 7 Hall element 8 Axis 9 Thrust washer 10 Washer 11 Supporting member 12 Main magnet 13 Sleeve 14 Hub 15 Rotating polygon mirror 17 Magnet wire 19 Adhesive 20 Radial dynamic pressure bearing part 21 Thrust Dynamic bearing g Herringbone groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Rie Wakashima 110-1 Shinkushita Nitta, Iruma City, Saitama Prefecture Copal Electronics Co., Ltd. Iruma Office (72) Hiroshi Nakayoshi Shinkushita Nitta, Iruma City, Saitama Prefecture 110-1 Copal Electronics Co., Ltd. Iruma Office

Claims (2)

[Scope of utility model registration request]
1. A radial dynamic pressure bearing portion (20) comprising a hollow cylindrical sleeve (13) and a shaft (8) having a plurality of herringbone grooves (g) formed on the outer periphery thereof, and the sleeve (13). ), A thrust bearing portion (21) composed of a washer (10) fixed through one end face or a support member (11) and a thrust washer (9) having a spiral groove formed in one end face, and Sleeve (1
3) In a hydrodynamic bearing type optical deflector equipped with a rotary polygon mirror (15) fixed via a flange-shaped hub (14) and a motor section, one end of the shaft (8) is A hydrodynamic bearing, which is fixed to a case (3) and whose other end is supported via an O-ring (1) inserted in a mirror cover (2) fixed to the case (3). Type optical deflector.
2. The shaft (8) and the mirror cover (2)
The fluid dynamic bearing type optical deflector according to claim 1, characterized in that an adhesive (19) is filled in a gap between the optical deflector and the bearing.
JP1256092U 1992-01-30 1992-01-30 Hydrodynamic bearing type optical deflector Pending JPH0564819U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1256092U JPH0564819U (en) 1992-01-30 1992-01-30 Hydrodynamic bearing type optical deflector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1256092U JPH0564819U (en) 1992-01-30 1992-01-30 Hydrodynamic bearing type optical deflector

Publications (1)

Publication Number Publication Date
JPH0564819U true JPH0564819U (en) 1993-08-27

Family

ID=11808734

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1256092U Pending JPH0564819U (en) 1992-01-30 1992-01-30 Hydrodynamic bearing type optical deflector

Country Status (1)

Country Link
JP (1) JPH0564819U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015174370A1 (en) * 2014-05-12 2015-11-19 日本電産コパル電子株式会社 Fluid dynamic bearing, motor, and optical deflector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03168407A (en) * 1989-11-27 1991-07-22 Fujitsu Ltd Fixing construction for shaft
JPH05134203A (en) * 1991-11-15 1993-05-28 Copal Electron Co Ltd Dynamic pressure air bearing type optical deflector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03168407A (en) * 1989-11-27 1991-07-22 Fujitsu Ltd Fixing construction for shaft
JPH05134203A (en) * 1991-11-15 1993-05-28 Copal Electron Co Ltd Dynamic pressure air bearing type optical deflector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015174370A1 (en) * 2014-05-12 2015-11-19 日本電産コパル電子株式会社 Fluid dynamic bearing, motor, and optical deflector
JP2015215054A (en) * 2014-05-12 2015-12-03 日本電産コパル電子株式会社 Fluid dynamic pressure bearing, motor and light deflector
US9709092B2 (en) 2014-05-12 2017-07-18 Nidec Copal Electronics Corporation Fluid dynamic bearing, motor, and optical deflector

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