JPH0737342A - Head carriage device for cartridge type disk drive - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a head carriage device which is capable of maintaining a smooth sliding state with a guide shaft and achieving a long life with respect to sliding without requiring a troublesome work of applying a lubricant. . [Structure] Holes 15 are formed in the front and rear sides of the carriage body 1. The bearing member 16 is formed of a material having self-lubricating properties, and the protrusion 18 is provided on the bearing portion 17. The protrusion 18 of the bearing member 16 is inserted into and fixed to the hole 15 of the carriage body 1 from below. When the hole 19 of the bearing portion 17 is fitted and slid on the guide shaft, the self-lubricating property of the bearing member 16 can maintain a smooth sliding state with the guide shaft. Since the protrusion 18 on the upper portion of the bearing portion 17 is fixed to the hole 15 of the carriage body 1, it is possible to bring the carriage body 1 closer to the guide shaft and lower the height of the carriage body 1 in the state of being fixed securely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cartridge type disk drive device, and more particularly to a head carriage device of a cartridge type disk drive device which has been made thinner in recent years.

[0002]

2. Description of the Related Art As a head carriage device of a conventional cartridge type disk drive device, a structure as shown in FIGS. 4 to 6 is known. 4 is a perspective view, FIG. 5 is a side view, FIG. 6 is a sectional view taken along line XX of FIG.

As shown in FIGS. 4 and 5, a side 0 magnetic head 2 is attached to the upper surface of the front end of a carriage body 1. A base of the arm 3 is supported by a flexible member 4 on the base of the carriage body 1 so as to be capable of being rotationally displaced in the vertical direction, and a magnetic head 5 of the side 1 is attached to the lower surface of the tip of the arm 3. The coiled portion of the load spring 7 is fitted to the arm portion 6 projecting from the base portion of the carriage body 1, one side of the load spring 7 is locked to the base portion of the carriage body 1, and the other side is engaged with the upper surface of the arm 3. Then, the elasticity of the load spring 7 urges the arm 3, that is, the magnetic head 5 toward the carriage body 1, that is, the magnetic head 2.
Holes 8 are formed in both front and rear sides of the lateral protrusion of the carriage body 1, and both front and rear sides are bent downward to form bearing portions 9 (see FIG. 6).

In the head carriage device formed as described above, the hole 8 of the bearing portion 9 is slidably fitted to the guide shaft 11 fixed to the base 10 and driven by a positioning device (not shown). The magnetic disk 14 of the disk cartridge 13 mounted on the spindle motor 12 on the base 10 is positioned in the radial direction (see the arrow in FIG. 5). Therefore, while the magnetic disk 2 is sandwiched by the magnetic heads 2 and 5 of the head carriage device, the magnetic disk 14 is rotated by driving the spindle motor 12, and the head carriage device is moved in the radial direction of the magnetic disk 14 by the positioning device. By doing so, it is possible to record and reproduce information on different tracks of the magnetic disk 14.

[0005]

However, in the above-described conventional head carriage device, since the pair of bearing portions 9 of the carriage body 1 are formed by a part of the members forming the carriage body 1, sliding is performed. The part does not have self-lubricating properties, and it is necessary to apply a lubricant such as grease in order to secure a life for sliding. Further, since the bearing portion 9 is formed by a part of the member forming the carriage body 1 as described above, the guide shaft 11 is formed by the thickness t of the member forming the carriage body 1 as is apparent from FIG.
The gap Z3 between the carriage body 1 and the carriage body 1 needs to be about 0.4 mm, which makes it difficult to reduce the thickness of the apparatus.

The present invention solves such a conventional problem and can maintain a smooth sliding state with respect to the guide shaft without requiring a troublesome work of applying a lubricant. It is an object of the present invention to provide a head carriage device of a cartridge type disk drive device capable of extending the life of sliding.

[0007]

The technical means of the present invention for achieving the above-mentioned object is a carriage body having a head, which is made of a material having self-lubricating properties and is slidably fitted to a guide shaft. The bearing member is fixed.

It is preferable that the bearing member in the above technical means has a protrusion on the upper portion of the bearing portion, and the protrusion is fixed in a state of being inserted into a hole formed in the carriage body.

[0009]

Therefore, according to the present invention, the self-lubricating bearing member fixed to the carriage body is fitted to the guide shaft, so that the guide shaft and the guide shaft are not required to be coated with a lubricant. The smooth sliding state of can be reliably maintained.

Further, the bearing member is provided with a protrusion on the upper portion of the bearing, and the protrusion is fixed while being inserted into the hole formed in the carriage body, so that when the bearing is fitted to the guide shaft, There is no risk of applying a force that twists the fixed portion, and the gap between the carriage body and the guide shaft can be minimized.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a head carriage device of a cartridge type disk drive device according to one embodiment of the present invention, and FIG. 2 is a perspective view showing the same head carriage device with a bearing member separated from a carriage body. FIG. 3 is a front view showing a bearing member and a carriage body in the head carriage device.

In the present embodiment, the same parts as those in the above-mentioned conventional example are designated by the same reference numerals, the description thereof will be omitted, and a different structure will be described.

As shown in FIGS. 1 to 3, holes 15 are formed in the front and rear sides of the carriage body 1. Each hole 1
The bearing member 16 fixed to 5 is formed of an oil-impregnated bearing (oil-free bearing) material having a self-lubricating property, and a protrusion 18 is integrally provided on an upper portion of the bearing portion 17. The protrusion 18 of the bearing member 16 is inserted into the hole 15 of the carriage body 1 from below and fixed by adhesion, plastic deformation by caulking, or the like.

Then, the hole 19 of the bearing portion 17 is formed in the base 10
It is slidably fitted to the guide shaft 11 (see FIG. 5) fixed to the guide shaft 11, but is fixed in a state where the projection 18 at the upper portion of the shaft portion 17 is inserted into the hole 15 of the carriage body 1 as described above. Therefore, the gap Z1 between the carriage body 1 and the upper edge of the hole 19 shown in FIG. 3, that is, the guide shaft 11, is about 0.05 mm with respect to about 0.4 mm of the gap Z3 shown in the conventional example of FIG.
It can be as small as m. Further, as described above, the bearing member 16 fixes the protrusion 18 provided on the upper portion of the bearing portion 17 to the hole 15 of the carriage body 1, and the fixed portion is located above the guide shaft 11 for guiding the movement. Therefore, there is no possibility that a force that gives a twist around the fitting portion with the guide shaft 11 is applied to the fixed portion, and the fixed state can be maintained. Therefore, the carriage body 1
The bearing member 16 without changing other configurations of the bearing member 16
The height Z2 of the carriage main body 1 from the guide shaft 11 fixed to the base 10 can be lowered so as to maintain the fixed state with respect to the carriage main body 1, and the thickness can be reduced. Further, since the oil-containing material is used for the bearing member 16 as described above, it is possible to prolong the life of the bearing member 16 without requiring a troublesome work of applying a lubricant for sliding the guide shaft 11.

[0016]

As described above, according to the present invention, the bearing member, which is made of a material having a self-lubricating property and is slidably fitted to the guide shaft, is fixed to the carriage body. Without needing the troublesome work of applying,
It is possible to maintain a smooth sliding state with the guide shaft, and therefore, it is possible to prolong the life of sliding.

Further, the bearing member is provided on the protrusion above the bearing, and the protrusion is fixed while being inserted into the hole formed in the carriage body, so that when the bearing is fitted to the guide shaft, There is no risk of applying a force that twists the fixed portion, and the height of the head carriage device can be lowered while maintaining the state where the bearing member is securely fixed to the carriage body. The thickness can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a head carriage device of a cartridge type disk drive device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the head carriage device with a bearing member separated from a carriage body.

FIG. 3 is a front view showing a bearing member and a carriage body in the head carriage device.

FIG. 4 is a perspective view showing a head carriage device of a conventional cartridge type disk drive device.

FIG. 5 is a side view showing the head carriage device.

FIG. 6 is a sectional view taken along line XX of FIG. 4, showing a bearing portion in the head carriage device.

[Explanation of symbols]

 1 Carriage Main Body 2 Magnetic Head 3 Arm 5 Magnetic Head 11 Guide Shaft 15 Hole 16 Bearing Member 17 Bearing Part 18 Projection

Claims (2)

[Claims] 1. A head carriage device of a cartridge type disk drive device in which a bearing body made of a self-lubricating material is fixed to a carriage body having a head and slidably fitted to a guide shaft. 2. The bearing member has a protrusion on an upper portion of the bearing portion,
2. The head carriage device of the cartridge type disk drive device according to claim 1, wherein the protrusion is fixed while being inserted into a hole formed in the carriage body.