JPH0312018A - Cylinder unit - Google Patents

Abstract

PURPOSE:To reduce the amount of work by sticking a magnetic head chip and a rotary side rotary transformer at a sheet of stepped plate, and mounting it with one touch action with fitting in a rotary cylinder. CONSTITUTION:The positioning of the magnetic head chip 2 is performed so as to obtain the prescribed amount of protrusion, head posture, head dividing, and head height of a magnetic head setting a fitting plane 24 on a stepped ring plate 22, and is stuck with an adhesive 3. Furthermore, the rotary side rotary transformer 27 is stuck on the stepped ring plate 22 setting the inner peripheral plane of the rotary transformer as fitting. Next, the ring plate 22 is inserted to an upper cylinder 1 so as to fit the fitting plane 37 of the cylinder 1 in the fitting plane 24 of the stepped ring plate 22. Thus, mounting can be performed with one touch action by performing fitting in the rotary cylinder.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a cylinder unit of a rotary head type magnetic recording/reproducing device, and in particular to mounting of a magnetic head rad mount or a rotating side rotary transformer.

[Conventional technology]

FIG. 9 is a cross-sectional view of a part of the magnetic head mounting part of a conventional cylinder unit shown in, for example, Japanese Utility Model Application Publication No. 62-35406. It is called the upper cylinder. (2) is the magnetic tip 7" for sending and receiving signals, <3) is the magnetic head chip (2), and adhesive is attached to the head base (4). (5)
The screw that attaches the HERADO PACE (4) to the upper cylinder (υ), (6) is the magnetic head chip (a coil wound around 2J), and (7) is the magnetic tape that records or reproduces signals from the magnetic head chip (2). , (8) is the upper cylinder (1
] is the rotating direction of the magnetic tape (7), (9) is the running direction of the magnetic tape (7),
(10) indicates the magnetic head gap portion, (11) indicates the protruding direction of the magnetic head, and (12) indicates the rotating direction of the magnetic head.

FIG. 10 is a diagram showing the appearance of a normal cylinder unit. In the figure, (13) is a fixed cylinder which is a fixed part, and is hereinafter referred to as a lower cylinder.

(14) is a lead part that guides the running along the end surface of a magnetic tape (not shown), (15) is an upper cylinder (I) t
- a drive motor that can rotate once; (16) indicates a mounting part that fixes the chassis (not shown) and the cylinder unit;

Fig. 11 is a cross-sectional view showing the general structure of the cylinder unit. (20) is a rotating side rotary transformer, (20) is an integrated flange with a shaft (19) which is a counterpart member of
1) shows a notch for protruding the magnetic head.

Next, the operation will be explained. The magnetic head chip (2) is pasted onto the head base (4) with an adhesive (3).

After that, the coil (6) is fully wound, the head height, etc. are measured, and the coils are classified by rank. When mounting the magnetic head chip (2) in the upper cylinder, it is fixed with screws (5) via the head base (4). At this time, the magnetic head chip (2) is finely adjusted in the protrusion direction (11) so that it protrudes a certain distance from the outer circular surface of the upper sill (1), and the gap part (10) at the tip of the magnetic head is at the apex. The attitude of the magnetic head chip (2) is adjusted by swinging the head base (4) to which the magnetic head chip (2) is attached so that the magnetic head chip (2) is oriented in the rotating direction (12). Each of the above adjustments requires precision on the order of microns.

In addition, since the magnetic head chip (2) and rotary transformer (20) shown in FIG. 11 are attached to a separate member, the signal line (not shown) It is relayed on the top of the screen.

[Problem to be solved by the invention]

In the conventional cylinder unit, the magnetic head mounting part is configured as described above, so when installing the magnetic head on the upper cylinder (1), the amount of protrusion, the mounting posture,
If there are multiple magnetic heads, the mounting angle (indexing amount) of each magnetic head must be finely adjusted, and the signal wires between the magnetic heads and the rotating rotary transformer (20) must be routed after the cylinder is assembled. There were problems such as the process was complicated and special jigs were required for each adjustment.

This invention was made to solve the above-mentioned problems, and allows the magnetic head to be attached to the metal cylinder with a single touch, and also allows for easy routing of signal lines between the magnetic head and the rotary transformer on the rotating side. The purpose is to obtain a cylinder unit that can.

[Friendly means of solving problems]

In the cylinder unit according to the present invention, a magnetic helad chip and a rotating side rotary transformer are attached to two stepped plates, and the stepped plates are attached to a rotating cylinder.

[For production]

The cylinder unit according to the present invention can be attached with one touch by fitting the stepped plate to which the magnetic head chip and the rotating side rotary transformer are attached to the rotating cylinder.

〔Example〕

Hereinafter, the simple side of this invention will be explained with reference to FIGS. 1 to 3.

In No. 1-, (22) is a stepped ring plate, [23] is a relay board, (24) is a precisely made fitting surface, (
25) is a hole, (26) is a positioning hole, (27) is a rotating side rotary transformer, (28) is a signal line connecting the rotating side rotary transformer (27) and the relay board (23), (2
9) is the inner winding for signal transmission of the rotary transformer (27), (30) is the outer winding, and (31) is the rotor IJ on the rotary side showing the fit with the stepped ring plate (22).
) The lance inner center fitting surface, (32) indicates the hole.

Next, FIG. 2 shows a state in which the rotating side rotary transformer (27) is removed from the service ring plate (22) shown in FIG. 1. In FIG. 2, (33) shows the fitting direction with the rotating side rotary transformer (27), and (34) shows the entire adhesive surface of the rotating side rotary transformer [27] to the stepped ring plate (22).

Next, FIG. 3 shows an example of how the stepped ring plate (22) is attached to the upper cylinder (1).
5) is the screw hole, (36) is the positioning hole, (37) is the precisely made fitting surface, (38) is the upper cylinder (1)
A notch for protruding the magnetic head provided in (3)
9) is a screw for fixing the stepped ring plate (22) t” to the upper cylinder (1), and (40) is the relative position Wtt between the stepped ring plate (22) and the upper cylinder (1). Hole (26), positioning pin to align (361), (41)
This is a screw hole for a set screw that finely adjusts the height of the two magnetic heads (2) in the H cylinder unit state. Incidentally, in each figure, the same parts as those in the conventional apparatus are designated by the same reference numerals, and the explanation thereof will be omitted.

Next, the operation will be explained. In FIG. 1, the magnetic head chip ( 2)
Position everything and attach with adhesive (3). Although the figure shows two heads, the same applies to a large number of heads. Further, the rotating side rotary transformer (27) is attached to the stepped ring plate (22) with the entire inner peripheral surface of the rotary transformer as a fitting. Rotating side rotary transformer [
The signal line (28) from [27] is soldered to the relay board (23). In the WJz diagram with the rotating side rotary transformer (27) removed, the rotating side rotary transformer (27) is removed.
7] is a mating surface (
33) performs radial positioning, and the bonding surface (3
4) It is firmly attached to the service ring plate (22).

Next, as shown in Fig. 3, the fitting surface (37) of the upper cylinder (1) and the fitting surface (24) of the stepped ring plate (22).
), fit the stepped ring plate (22) into the upper cylinder (1). At this time, insert the stepped ring plate (22)
The upper positioning hole (26) and the positioning hole (36) for the upper cylinder (1) allow the relative position of all units using the positioning pin (40). (38).Next, use the screws (39) to set the stepped plate (38).
22) and the screw hole (35) on the upper cylinder (1).The upper cylinder unit is thus completed.

In the above embodiment, the stepped ring plate (22) and the rotary transformer (27) are fitted using the fitting surface (33), but as shown in FIG. 4, a separate jig (not shown) is used. ) can be used for positioning on the stepped ring plate (22), and the fitting surface (33) can be omitted.

Further, in the above embodiment, the height of the magnetic head chip (2) is finely adjusted in the cylinder unit state using the screw (42) that fits into the screw hole (41).
It may be omitted if high-precision adhesion of the magnetic head chip (2) and high-precision assembly of the cylinder unit are performed. When finely adjusting the height, use the grooves (43
) may be provided. A vertical cross-sectional view of @Figure 5 is shown in Figure 6,
In the figure (44) is the height of the magnetic head chip (2) 1lJi.
It shows the number of times.

Furthermore, in the above embodiment, the inner ff of the stepped ring plate (22)
/, and (24) was made the fitting surface, but as shown in Fig. 7, the outer peripheral surface (45) tU of the stepped ring plate (22) was made the fitting surface, and the front of the outer ring of the upper cylinder (1) (! If (46) may be used as a fitting surface.

Further, although the above embodiment shows the case where the number of magnetic heads is two, the effect of the present invention increases as the number of heads increases. However, in addition to screwing, there are two ways to attach the useful ring plate (22) to the upper cylinder (1), including when there are multiple heads, by mounting it as shown in Figure 8 (&), or by mounting it as shown in Figure 8 (&). (1) As shown in 7, press fitting can also be performed. 8th
In the figure, (47) indicates the adhesive, and (4B) indicates the press-fitting surface.

Further, in the above embodiment, the inner cylindrical surface of the stepped ring plate (22) was used as the fitting surface, but only a part of the inner circumferential surface may be used, and the same effect as in the above embodiment can be achieved.

In addition, in each of the above embodiments, a stepped ring plate (
22], but it may be a stepped rectangle, and as long as it has a shape that allows positioning with the so-called upper cylinder peak, it will have the same effect as the upper cylinder side.

〔Effect of the invention〕

As described above, according to the present invention, the magnetic helad chip and the rotary transformer on the rotating side are attached to a single stepped plate, and the unit is configured so that it can be attached to the rotating cylinder with a single touch. This has the effect of reducing work time by simplifying the process.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a stepped ring plate on which a magnetic head and a rotating rotary transformer constituting a cylinder unit according to an embodiment of the present invention are mounted, and FIG. FIG. 3 is a developed view showing how the stepped ring plate of FIG. 1 is attached to the upper cylinder; FIG. 4 is a perspective view showing another embodiment of the present invention; FIG. 6 is a sectional view of FIG. 5, FIG. 7 is a perspective view of another embodiment of the invention, and FIG. 8 is a perspective view of another embodiment of the invention. It is a perspective view showing an example. FIG. 9 is a plan view showing a conventional magnetic rad mount, W,
FIG. 10 is a perspective view showing the entire ordinary cylinder unit, and FIG. 11 is a sectional view of the cylinder unit shown in FIG. 10. In the figure, (1) is the upper cylinder, +2) i'i & ii
K head chip, (20) is the rotating side rotary transformer,
(22) is a stepped ring plate, (24) is a fitting, (2
6] indicates a positioning hole, (28 indicates a signal line, and (32) indicates a hole. In addition, the same reference numeral in the figure indicates the same or equivalent part.

Claims (1)

[Claims] (1) It is equipped with a magnetic head and consists of a rotating rotary cylinder and a stationary cylinder. A tape-shaped magnetic recording medium is wound around a part of the outer peripheral surface of the cylinder, and a signal track is run diagonally on the magnetic recording medium. In the cylinder unit, the magnetic head and the rotating rotary transformer are attached on one stepped plate, and this is used as a unit to connect the inner circumferential surface or outer circumferential surface of the stepped plate and the rotating side rotary transformer. A cylinder unit characterized by being able to be installed with one touch by fitting into the cylinder.