JPH04111277U - Floppy disk drive motor - Google Patents

Abstract

(57) [Summary] (Purpose) To enable mechanically accurate determination of the mounting position of a motor with respect to the chassis of a disk drive device. (Configuration) Rotor case 12 with drive magnet 13
A floppy disk drive motor comprising: a stator 20 facing a drive magnet; a substrate 2 on which the stator is placed; and a hub stand 11 disposed on the outer end surface of the rotor case on which a floppy disk is placed and driven. , a cylindrical protrusion 3 to be fitted into a through hole 16 formed in a chassis 15 for fixing the motor is provided to protrude from the surface of the board 2 opposite to the rotor case, An insertion hole 5 for a fixing screw 14 was formed. The cylindrical protrusion is
It may be formed integrally with the bearing holder 1.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a floppy disk drive motor, and particularly relates to a chassis fastening motor. Concerning fixed structure.

0002

[Conventional technology]

A floppy disk drive motor is used as a fixed structure to the chassis. Assemble the disc drive motor as a single unit in advance, and then secure it to the chassis. and the chassis as described in Japanese Utility Model Application Publication No. 60-44476. There is one that is assembled by attaching motor parts to this instead of a board. the latter In this example, a shaft with a rotor assembled as one piece is held in a bearing holder, and The motor is inserted into the chassis by fitting it into the hole in the chassis, positioning it, and fixing it. This is a type in which the motor parts are assembled individually, and a single motor is attached to the chassis. There are no problems with positioning the motor relative to the chassis.

0003 On the other hand, the floppy disk drive motor is fixed to the chassis. According to this, the problem of positioning the motor relative to the chassis arises. this problem In explaining this, we will first explain the conventional example for this type of floppy disk drive. I will explain.

0004 In FIGS. 3 to 5, a bearing holder 43 is fixed at the center of the substrate 42. The outer periphery of the bearing holder 43 includes a stator core 58 and each salient pole of this core 58. A stator having a wound drive coil 59 is arranged, and this stator is connected to the base. It is placed on a plate 42. Bearings 46 and 47 are fitted into the bearing holder 43. A rotating shaft 50 is supported by bearings 46 and 47. Bearing holder 43? At the upper end of the rotating shaft 50 protruding from the A stand 51 is fixed, and a cup-shaped rotor case 52 is fixed to the outer periphery of the hub stand 51. has been done. A drive magnet 53 is fixed to the inner surface of the peripheral wall of the rotor case 52. It is. The drive magnet 53 is spaced apart from the outer peripheral surface of the stator core 58 by a predetermined distance. They are facing each other. On the side of the hub stand 51, there is a floppy disk placed on the hub stand 51. A drive pin that rotates the floppy disk by engaging with the hole in the hub of the disk. 55 are provided.

[0005] As described above, a single floppy disk drive motor is completed. this The motor board 42 is connected to the disk drive chassis 56 (see Figure 5). A hole 45 is formed through which a fixing screw 54 is inserted. Insert the screw 54 into this hole 45. the floppy disk, and screw the screw 54 into the screw hole of the chassis 56. - A single disk drive motor is fixed on the chassis 56.

[0006]

[Problem that the idea aims to solve]

According to the conventional floppy disk drive motor described above, the motor is When installing the motor to the chassis 56, the motor mounting hole 45 formed in the board 42 and the fixing hole 45 are Because there is a gap between the screws 54 and the screws 54, the position of the motor with respect to the chassis 56 is Not determined. Therefore, the amount of alignment adjustment for the head that slides against the disk increases. There is a problem in that it takes a lot of time to adjust.

[0007] This invention was devised to solve these problems. The motor mounting position can be determined mechanically accurately with respect to the chassis of the drive device. An object of the present invention is to provide a floppy disk drive motor that can drive a floppy disk.

[0008]

[Means to solve the problem]

This invention consists of a rotor case, a stator, a board on which the stator is placed, and a rotor case. Equipped with a hub stand placed on the outer edge of the case on which a floppy disk is placed and driven. In the newly developed floppy disk drive motor, there is a hole in the chassis that fixes the motor. Place the cylindrical protrusion that should fit into the provided through hole from the side of the board opposite to the rotor case. The board shall have an insertion hole for the screw for fixing it to the chassis. It is characterized by The cylindrical protrusion may be formed integrally with the bearing holder.

[0009]

[Effect]

By fitting the cylindrical protrusion provided on the board into the through hole drilled in the chassis. A motor is positioned relative to the chassis. In this state, insert the fixing screw into the insertion hole of the board. If you insert the motor into the chassis and screw it into the It will be done.

0010

【Example】

The floppy disk drive model according to the present invention will be explained below with reference to FIGS. 1 and 2. An example of the data will be explained. In Fig. 1, a hole in the center of a substrate 2 made of an iron plate or the like has a hole in the lower part of a bearing holder 1. The integrally formed cylindrical protrusion 3 is fitted into the flange 18 of the bearing holder 1. It is fixed to the substrate 2. A stator core 8 and this core are arranged on the outer periphery of the bearing housing 3. A stator 20 having a drive coil 9 wound around each salient pole of A 8 is disposed, This stator 20 is placed on the substrate 2.

[0011] Two bearings 6 and 7 are fitted in the bearing housing 1. The rotating shaft 10 is supported. The rotating shaft 10 protruding from the bearing housing 1 A hub stand 11 for placing a floppy disk is fixed to the upper end. A flat cup-shaped rotor case 12 is fixed to the outer periphery of the stand 11. Low A drive magnet 13 is fixed to the inner surface of the peripheral wall of the case 12. Driving machine The gunnet 13 faces the outer peripheral surface of the stator core 18 with a predetermined distance therebetween. In this way, a single floppy disk drive motor is assembled.

0012 The lower surface side of the board 2 of the single floppy disk drive motor, in other words, the board 2, which is integrally formed with the bearing holder 1 from the side opposite to the rotor case 12. The cylindrical protrusion 3 protrudes. In addition, the above motor itself is a disk drive The cylindrical protrusion 3 is fixed to the chassis 15 of the device. A through hole 16 to be fitted is bored. The cylindrical protrusion 3 and the through hole 16 are It is for positioning the motor alone with respect to the seat 15, and the cylindrical protrusion 3 is inserted into the through hole 1. 6, the motor alone is positioned with respect to the chassis 15. It looks like this.

[0013] The outer edge of the board 2 has an appropriate number of insertion holes 5 for inserting the fixing screws 14. It is formed. The chassis 15 also has a fixing screw inserted into the insertion hole 5. A screw hole 17 is formed into which the screw 14 is screwed. Therefore, as above, yen A fixing screw 14 inserted into the insertion hole 5 after fitting the cylindrical protrusion 3 into the through hole 16 By screwing into the screw hole 17 of the chassis 15, the above-mentioned module is attached to the chassis 15. A single unit of data can be positioned and fixed. The rotation principle of the above motor is well known. Since there is, I will omit the explanation.

[0014] According to the above embodiment, the disk chucking mechanism is formed integrally with the rotor. In a floppy disk drive motor, the cylindrical protrusion 3 for positioning is The motor is positioned simply by fitting it into the positioning hole 16 of the seat 15. Adjust the position within the gap between the fixing screw insertion hole on the board and the fixing screw as before. Since there is no need to fix the head with This simplifies the maintenance work, and also makes it easier to attach the motor to the chassis. Position accuracy can be improved.

[0015] The cylindrical protrusion 3 is for positioning, and the motor is fixed to the chassis 15. Screw the fixing screw 14 inserted into the insertion hole 5 of the board 2 into the screw hole 17 of the chassis 15. Since this is done by There is no need to strengthen the structure of section 3, and the motor must be securely and securely connected to chassis 15. Another advantage is that it can be firmly fixed.

[0016] Furthermore, since the cylindrical protrusion 3 is embedded in the through hole 16 of the chassis 15, the cylindrical protrusion 3 Even if the protruding portion 3 is provided, it will not cause an increase in the height dimension of the entire motor. , a thin structure obtained by integrally forming the hub stand 11 with the rotor case 12. You can take full advantage of the advantages.

[0017] Next, another embodiment of the present invention shown in FIG. 2 will be described. In Figure 2, the iron plate A bearing holder 23 is fixed to the upper surface side of the central part of the board 22, which is made of 22 has a cylindrical protrusion formed separately from the bearing holder 23 on the lower surface side of the center thereof. 21 is fixed and protrudes from the lower surface side of the substrate 22. Symbols 26 and 27 are bearings, 2 8 is a stator core, 29 is a drive coil, 30 is a rotating shaft, 31 is a hub stand, and 32 is a rotor. 33 indicates a drive magnet, and each of these components Thus, a single motor unit equivalent to that of the embodiment shown in FIG. 1 is constructed.

[0018] The chassis 35 of the disk drive device to which the motor itself is to be fixed has the above-mentioned cylinder. A through hole 36 is formed to receive the shaped protrusion 21 and position the motor alone. Ru. Further, the outer edge of the board 22 has an insertion hole 25 for inserting the fixing screw 34. are formed in appropriate numbers. The chassis 35 has a fixing member inserted into the insertion hole 25. A screw hole 37 is formed into which a screw 34 is inserted. Therefore, as above For fixing, the cylindrical protrusion 21 is fitted into the through hole 36 and then inserted into the insertion hole 25. By screwing the screw 34 into the screw hole 37 of the chassis 35, it is attached to the chassis 35. The motor alone can be positioned and fixed.

[0019] As in the above embodiment, the cylindrical protrusion 21 is a separate component from the bearing holder 23. However, the same effects as in the embodiment shown in FIG. 1 can be obtained.

[0020]

[Effect of the idea]

According to the present invention, the cylindrical protrusion for positioning is fitted into the positioning hole of the chassis. The motor is positioned just by matching the screws, and the screws for fixing the board can be inserted as before. There is no need to adjust the position within the gap between the hole and the fixing screw to fix it. The alignment work is extremely easy and the head alignment adjustment work can be simplified. However, the accuracy of the mounting position of the motor to the chassis can be improved.

[0021] In addition, the cylindrical protrusion is for positioning, and the fixing of the motor to the chassis is on the board. Because the fixing screw is inserted through the insertion hole, no excessive force is applied to the cylindrical protrusion. , there is no need to strengthen the structure of the cylindrical protrusion and to secure the motor against the chassis. Another advantage is that it can be firmly and firmly fixed.

[Brief explanation of drawings]

FIG. 1 is a sectional front view showing an embodiment of a floppy disk drive motor according to the present invention.

FIG. 2 is a sectional front view showing another embodiment of the floppy disk drive motor according to the present invention.

FIG. 3 is a plan view showing an example of a conventional floppy disk drive motor.

FIG. 4 is a partially sectional front view of the same as above.

FIG. 5 is a partially sectional front view showing the conventional example fixed to the chassis;

[Explanation of symbols]

1 Bearing holder 2,22 Substrate 5,25 Insertion hole 3,21 Cylindrical protrusion 9,29 coil 11,31 Hub stand 12,32 Rotor case 13,33 Drive magnet 14, 34 Fixing screw 15,35 chassis 16,36 Through hole 20,40 stator

Claims (2)

[Scope of utility model registration request] 1. A rotor case having a driving magnet, a stator having a coil and facing the driving magnet, a substrate on which the stator is placed, and a floppy disk placed on the outer end surface of the rotor case. In a floppy disk drive motor that is equipped with a hub stand that drives the motor, the cylindrical protrusion that is to be fitted into the through hole formed in the chassis that fixes the motor is placed on the opposite side of the board from the rotor case. A motor for driving a floppy disk, the motor being provided to protrude from a surface, and having an insertion hole formed in the substrate for a screw for fixing to the chassis. 2. A floppy disk drive motor according to claim 1, wherein the cylindrical protrusion is integrally formed with the bearing holder.