JPH0410201A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To miniaturize a cylinder device by adopting a dynamic pressure group bearing to a rotary transformer holding part. CONSTITUTION:A motor housing 12 is fitted to a lower cylinder 5, and a stator side rotary transformer 18 for recording and reproducing information is fitted in the inside of this lower cylinder 5. On the other hand, a rotor side rotary transformer 19 is fitted to a disk 3 fitted with the upper cylinder 1 on the side of the upper cylinder 1. A magnetic head 2 is installed while being separat ed for recording and reproducing and for reproducing in the disk 3. On the other hand, a bearing 20 with shaft is composed of an upper cylinder side bear ing 21, lower cylinder side bearing 22, preloading spring 23 and rotary shaft 24. At the upper part of the rotary shaft 24, a rotor side rotary transformer 25 is fitted through a spacer 26 and a stator side rotary transformer 27 is fitted through a housing 28. On a contact face 29 between the spacer 26 and the housing 28, a dynamic pressure group is formed and the spacer 26 and the housing 28 are smoothly slid.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to means for fixing a rotor transformer in an information recording/reproducing apparatus.

(B) Conventional Technology As magnetic recording and reproducing devices become smaller and include more magnetic heads, and due to the need for simultaneous monitoring, the crosstalk of rotary transformers is becoming more important. Conventional 8
An example for +r+mV TR is shown in FIG. Four magnetic heads (2) are attached to the upper cylinder (1) that records and plays while rotating, and a rotary transformer (4) on the rotor side is attached to the fixed disk (3) of the upper cylinder (1).
is attached to the lower cylinder (5), and a fixed side rotary transformer (6) is attached to the lower cylinder (5). The bearing (7) is composed of an upper housing bearing (8), a lower housing bearing (9), a preload spring (10), and a rotating shaft (11), and a motor housing (12) is attached thereto. As mentioned above, rotary transformer (4) (6)
The configuration is such that recording and playback signals are transmitted within the device.

As another conventional example, Japanese Patent Application Laid-open No. 117401/1983 (
As disclosed in GIIB 5102), there are two rotary transformers installed in the lower cylinder with separate channels, and an example as shown in Figure 6, in which identical parts are given the same reference numerals. The explanation will be omitted. In the figure, in a magnetic recording and reproducing device consisting of an upper cylinder (1), a lower cylinder (5), and a motor housing (12), a pair of rotary transformers is built inside the lower cylinder (5), and a column 03) and a spacer ( 14) to fix the stator side rotary transformer (15), and then fix the upper cylinder (1
) A rotor-side rotary transformer (17) is fixed to the upper spacer (16), and some also have a pair of rotary transformers on the outside.

(c) Problems to be Solved by the Invention In the conventional example described above, as the cylinder becomes smaller, it is no longer possible to incorporate a rotary transformer for two channels in the lower cylinder. Further, when the rotary transformer is provided above the upper cylinder, there are problems in that the fixation of the rotary transformer becomes unstable and there are few places to fix the rotary transformer supporting columns.

(d) Means for Solving the Problems The present invention was made in view of the above problems, and is a method for mounting the rotary transformer on the rotating shaft of the upper cylinder in an information recording/reproducing device having the rotary transformer at the upper part of the upper cylinder. A dynamic pressure groove was formed on the rotor no transformer holding member.

(e) In operation, a member for holding the rotary transformer is provided relative to the rotation axis of the cylinder, and a dynamic pressure groove is formed in this member, so that the rotor-side rotary transformer fixed to the upper cylinder and the lead The stator-side rotary transformer to which the wires and the like are attached is slidable, that is, relatively rotatable.

(F) Embodiment An embodiment of the present invention will be described with reference to the drawings. In addition, the same parts are given the same reference numerals and the description thereof will be omitted. FIG. 1 is a side view including a sectional view of an embodiment of the present invention, FIG. 2 is a view showing details of the spacer, FIG. 3 is a view showing details of the housing, and FIG. It is a diagram showing details of a pig. A motor housing (12) is attached to the lower cylinder (5), and a stator-side rotary transformer (18) for recording and reproducing information is attached inside the lower cylinder (5). On the other hand, on the upper cylinder (1) side, the upper cylinder (1
) is attached to the disk (3), and a rotor-side rotary transformer (19) is attached to the disk (3). Magnetic disks (2) are installed on the disk (3) separately for recording and reproducing purposes and for reproducing purposes. In addition, a bear nongong with a shaft (2 [
)) are the upper cylinder side bearing (21), the lower cylinder side bearing (22), the preload spring (23), and the rotating shaft (
24). A rotor-side rotary transformer (25) is connected to the upper part of the rotating shaft (24) via a spacer (26), and a stator-side rotary transformer (
27) is attached via the housing (28). Here, as shown in FIG. 2, a dynamic pressure groove is formed on the contact surface (29) of the spacer (26) with the housing (27), and the spacer (26) and the housing (29) are formed with a dynamic pressure groove.
27) slides smoothly. Also, as shown in Figure 3,
The contact surface (30) of the housing (28) with the rotating shaft (24)
) is formed with a dynamic pressure groove as shown in FIG. 3(c), so that the housing (28) and the rotating shaft (24) slide smoothly. In addition, the housing (28) is a knock bottle (3
1) prevents removal. Furthermore, the housing (2
An upper lid (32) is attached to the upper lid (32), and a dynamic pressure groove is formed in the center of the upper lid (32) on the surface in contact with the rotating shaft (24), as shown in FIG.

With the above configuration, the rotary transformer (25)
The gap of (27) is the housing of the spacer (26) (
Since it is determined by the thickness (33) of the contact surface (29) with (28), it does not result in a complicated mechanism. Also, spacer (26)
Since dynamic pressure grooves are formed in the housing (28) and the upper lid (32), only a slight load is applied to the stator side rotary transformer (27), that is, just by connecting the node wire, the stator side rotor The no transformer (27) never rotates. The lead wire (34) connects the magnetic head (2) and rotor side rotary transformer (25)
The lead wire (35) is a signal output wire from the stator side rotary transformer (27).

(G) Effects of the Invention As described above, according to the present invention, by adopting a dynamic pressure groove bearing for the rotary transformer holding member, the rotary transformer can be mounted without providing a support or the like to the upper part of the upper cylinder. The rotor side and stator side of the rotary transformer can be installed stably, and the cylinder device can be downsized.

[Brief explanation of drawings]

Fig. 1 is a side view including a sectional view of an embodiment of the present invention, Fig. 2 is a view showing details of the spacer, Fig. 3 is a view showing details of the housing, and Fig. 4 is a view showing details of the upper lid. , FIG. 5, and FIG. 6 are diagrams showing conventional examples, respectively. (1)------Upper cylinder, (24)・---1-
--- Rotating shaft, (25) (27) -1111111 rotary transformer, (26') ----- Spacer (rotary transformer holding member), (28) --- −
-----Housing (rotary transformer holding member).

Claims (1)

[Claims] (1) An information recording/reproducing device having a rotary transformer at the upper part of the upper cylinder, characterized in that a dynamic pressure groove is formed in the rotary transformer holding member for mounting the rotary transformer on the rotating shaft of the upper cylinder. Recording and playback device.