JPH1125664A - Recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording and reproducing device in which the number of the parts is reduced, workability at the time of assembling work is improved, and manufacturing cost can be reduced. SOLUTION: In a recording and reproducing device which is provided with plural magnetic heads 5, in which a magnetic tape is wound and driven on a rotating drum, and a signal is recorded and reproduced in/from a magnetic tape, a rotor part 14 of a capstan motor 12 driving a tape is shielded, and the device is provided with a cover member A enabling a drum D to be attached through one action.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus such as a video tape recorder (VTR).

[0002]

2. Description of the Related Art Conventionally, a VT integrated with a video camera
In R, the tape running deck portion of these VTRs has been reduced in size and thickness.

For this reason, when the height of a rotor portion of a capstan motor for driving a tape is substantially the same as that of a reference ground plane (hereinafter referred to as a main chassis) or the rotor portion is disposed below the main chassis. Therefore, as shown in Japanese Utility Model Laid-Open No. 4-105832, a large hole is often formed in the main chassis, and the rotor portion of the capstan motor is arranged there.

[0004] On the other hand, the capstan motor also outputs an FG (frequency generator) signal for controlling the rotation speed (improvement of rotation characteristics against start-up characteristics and load fluctuations) to the rotor as shown in Japanese Utility Model Application Laid-Open No. 4-105832. The FG magnet formed on the outer periphery is magnetized, and the FG signal is picked up by a magnetoresistive element to detect the FG.

[0005]

However, in the above-mentioned conventional example, the gap between the FG magnet and the magnetoresistive element is about 100 μm, so that when the rotor portion is exposed from the main chassis, There is a problem in that the gap between the two is clogged with dust (dust) or dust and rotation failure occurs. A cover is provided so as to surround this rotor portion, but it is structured to be screwed from the back side, Since the cost is greatly increased due to the increase in the number of parts and the increase in the amount of work, there is a problem that the work must be improved and the cost must be reduced.

The present invention has been made by paying attention to the above points, and in order to reduce the number of parts and to improve the mounting work, a cover member capable of performing drum mounting on a main chassis by one-touch work is provided. It is an object of the present invention to provide a recording / reproducing apparatus which can be provided and can reduce the cost.

[0007]

The present invention can solve the above-mentioned problems by providing the following constitution.

(1) A magnetic tape is provided around a rotating drum, provided with a plurality of magnetic heads.
In a recording / reproducing apparatus for recording and reproducing a signal on and from the magnetic tape, a cover member for shielding a rotor portion of a capstan motor for driving the tape and allowing the drum to be attached with one touch is provided. Record
Playback device.

(2) The cover member is provided with a hook at one end thereof for hooking on the chassis, and the other has a shape having a function as a spring having resilience, and holds the drum so as to be pulled downward. (1)
Recording / reproducing apparatus according to the above.

(3) The recording / reproducing apparatus according to (1), wherein the cover member has only one set screw, and the drum is screw-connected to the chassis via the cover member only with the set screw. Equipment.

[0011]

Embodiments of the present invention will be described below.

FIG. 1 is a partially cutaway side view showing an embodiment of a recording / reproducing apparatus according to the present invention, and FIG. 2 is a rear view showing an example of installation of a cover member.

Referring to the drawings, reference numeral 1 denotes a main chassis, which is a main plate serving as a reference of a tape running deck, and each part is assembled on the basis of the main chassis 1. Reference numeral 2 denotes a drum base, and a lower drum 4 provided coaxially with an upper drum 3 having a magnetic head 5 constitutes a drum D, and the drum D is connected to the main chassis 1 via the drum base 2 at a predetermined inclination angle. It is installed in.

Reference numerals 6 and 9 denote rotary roller guides, and reference numerals 7 and 8 denote fixed guides, which constitute a tape guide T for winding a (magnetic) tape obliquely around the drum D to stably run. The rotating roller guides 6 and 9 are respectively formed with upper and lower flanges to regulate the position of the drum D in the axial direction when the tape runs.

Reference numerals 10 and 11 denote skates, which are rotating roller guides 6 and 9 constituting a tape guide T.
The fixed guides 7 and 8 are mounted on the skates 10 and 11 and receive portions 2a and 2a formed from the drum base 2.
Positioning arrangement is made by 2b.

Numeral 12 indicates the position of the capstan motor, and numeral 13 indicates a capstan shaft.
A pin (not shown) is provided in pressure contact with the capstan shaft 13, and a (magnetic) tape is sandwiched between the capstan shaft 13 and the pin (not shown) to rotate and drive the tape. .

Reference numeral 14 denotes a rotor portion of the capstan motor 12 fixed to the capstan shaft 13, which is provided at the same height level as the main chassis 1, and as shown in FIG.
A hole larger than the rotor portion 14 is formed so that the rotor portion 14 can be disposed through the main chassis 1.

A is a cover member, 15 is a capstan cover portion, 15b is a spring portion, 16 is a set screw, and the cover member A is composed of the capstan cover portion 15 and the spring portion 15b. Utilizing the resilience of the part 15b,
A set screw 16 is provided for holding the drum D so as to be pulled downward through the drum base 2.

As for other reference numerals, 15a is a hook provided so that the cover member A can be attached to the chassis 1 with one set screw 16, and this hook 15a is provided on the rotor 14 side of the chassis 1. The cover member A is hooked so as to be hooked on the side end portion, and one-touch mounting is possible at the other end portion of the cover member A with a set screw 16.

Reference numeral 17 denotes a flexible board for transmitting signals to a signal processing board (not shown).

The operation will be described based on the above configuration.

When assembling and installing a drum D or the like of a recording / reproducing apparatus such as a video tape recorder (VTR) integrated with a video camera, the drum D needs to have a recording capacity of one track as large as possible. It is customary to mount the tape at a predetermined inclination angle with respect to the running level of the tape. , Rotor part 14 of capstan motor 12
The cover member A is applied from below so as to be hooked on the side end of the main chassis 1 on the side where is located, and the other end of the cover member A is placed on the back side of the main chassis 1 so as to surround the rotor portion 14. Fitting, as shown in Figure 1,
The spring portion 15b of the cover member A is
Of the drum base 2 through the drum base 2 with the set screw 16 so that the drum D can be pulled downward through the hole formed so that the drum base 2 can be seen through from the back side of the drum base 2. Can be.

By attaching the cover member A as described above, the capstan cover portion 1 of the cover member A is provided.
5 shields the rotor portion 14 of the capstan motor 12,
The gap (about 100 μm) between an FG magnet formed on the outer periphery of the rotor section 14 of the capstan motor 12 and a magnetoresistive element (not shown) for detecting an FG signal is prevented from being clogged with dust and dust, and a cover member is provided. Spring part 1 constituting A
Since the drum D is held so as to be pulled downward through the drum base 2 by the action of 5b, the inclination angle and the mounting position of the drum D can be firmly maintained as specified.

[0024]

According to the present invention, recording / recording of a video tape recorder (VTR) integrated with a video camera is performed.
A cover member having a resilient spring function and having a hook at one end is used to prevent dust clogging and reduce the number of parts when assembling and attaching the drum D of the playback device. The effect is that the number of drums can be reduced and the drum can be attached with one touch, thereby reducing costs.

[Brief description of the drawings]

FIG. 1 is a partially cutaway longitudinal side view showing an embodiment of a recording / reproducing apparatus according to the present invention.

FIG. 2 is a rear view showing an example of installation of a cover member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main chassis 2 Drum base 3 Upper drum 4 Lower drum 5 Magnetic head 6 Rotary roller guide 7 Fixed guide 8 Fixed guide 9 Rotary roller guide 10 Skate 11 Skate 12 Capstan motor (position) 13 Capstan shaft 14 Rotor part 15 Capstan Cover 16 Set screw 17 Flexible board A Cover member D Drum T Tape guide

Claims (3)

[Claims] 1. A recording / reproducing apparatus comprising a plurality of magnetic heads, winding a magnetic tape around a rotating drum, and recording and reproducing signals on and from the magnetic tape. A recording / reproducing apparatus comprising: a cover member that shields a rotor portion of a capstan motor and allows the drum to be attached in a one-touch manner. The cover member is provided with a hook portion at one end thereof for hooking on a chassis, and the other has a shape having a function as a resilient spring, and holds the drum so as to be pulled downward. The recording / reproducing apparatus according to claim 1, wherein: 3. The cover member has only one set screw,
2. The recording / reproducing apparatus according to claim 1, wherein the drum is screwed to the chassis via the cover member only with the set screw.