JPH0158289U

JPH0158289U -

Info

Publication number: JPH0158289U
Application number: JP15277287U
Authority: JP
Priority date: 1987-10-07
Filing date: 1987-10-07
Publication date: 1989-04-12

Description

[Brief explanation of drawings]

第１図は本考案に成るポジシヨニングモータの
筐体の構造を示す背面図ａと側面図ｂ、第２図は
本考案になる予圧バネの背面図ａと断面図ｂ、第
３図は要部拡大断面略図でａは予圧バネ部材の足
部１―１の部分、ｂは筐体２に設けた孔２―１と
小突起２―２の部分、ｃは嵌着固定部の拡大断面
略図、第４図は従来より実施されているポジシヨ
ニングモータの構造を示す断面図ａ、背面図ｂ、
第５図ａは予圧バネ部材のカシメ固着の例、ｂは
同じく小ネジでの固定の例の当該部分拡大図であ
る。符号の説明、１……予圧バネ部材、１―１……
足部、１―２……足部の剪断面、１―３……舌状
の予圧付与片、１―４……他の足部、１―５……
小孔、２……筐体、２―１……小孔、２―２……
小突起、２―２１……小突起の側面、２―３……
小突起の内面側小空間、２―４……筐体背面、２
―５……筐体内面、２―６……雌ネジ、２―７…
…カシメ部、２―８……小ネジ、３……軸受保持
部、４，４……軸受、５……回転子軸、６……ス
クリユウ、７……回転子。 Figure 1 is a rear view a and side view b showing the structure of the housing of the positioning motor according to the present invention, Figure 2 is a rear view a and cross-sectional view b of the preload spring according to the present invention, and Figure 3 is In the schematic enlarged cross-sectional view of the main parts, a is the leg portion 1-1 of the preload spring member, b is the hole 2-1 provided in the housing 2 and the small protrusion 2-2, and c is an enlarged cross-section of the fitting and fixing part. Schematic diagram, FIG. 4 is a sectional view a showing the structure of a conventional positioning motor, a rear view b,
FIG. 5a is an example of fixing the preload spring member by caulking, and FIG. 5b is a partially enlarged view of an example of fixing with machine screws. Explanation of symbols, 1... Preload spring member, 1-1...
Foot part, 1-2... Sheared surface of the foot part, 1-3... Tongue-shaped preload applying piece, 1-4... Other foot part, 1-5...
Small hole, 2... Housing, 2-1... Small hole, 2-2...
Small protrusion, 2-21...Side surface of small protrusion, 2-3...
Small space on the inner surface of the small protrusion, 2-4... Back of the housing, 2
-5...Inner surface of the housing, 2-6...Female thread, 2-7...
... Caulking part, 2-8 ... Machine screw, 3 ... Bearing holding part, 4, 4 ... Bearing, 5 ... Rotor shaft, 6 ... Screw, 7 ... Rotor.

Claims

[Claims for Utility Model Registration] (1) A positioning motor used for driving the magnetic head of a floppy disk drive, etc., in which a plurality of small holes are arranged concentrically at approximately equal intervals on the back of the casing. , a portion extending in the circumferential direction in the same direction as the plurality of small holes is slightly convex toward the outer surface of the housing to form a small space on the inner surface of the convex portion, and a rotor shaft is inserted into the small space. 1. A positioning motor characterized by having a structure in which a tip of an arcuate leg portion disposed on the outer periphery of a preload spring member that applies an axial preload to the motor is fitted, and the preload spring member is fixed to the housing. (2) The preload spring member has a tongue-shaped preload applying piece cut and raised at an appropriate angle at a substantially central portion thereof, and a plurality of small holes arranged on the back surface of the casing are formed on the outer periphery of the member, facing the plurality of small holes. At this position, an arc-shaped foot portion is cut and raised on the same side as the cut-and-raised portion of the central portion, and the vicinity of the tip of the foot portion is bent back so as to be parallel to the surface of the preload spring member. The positioning motor according to claim 1 of the utility model registration claim.