JPS5935858Y2 - Protective cover device for magnetic head in cassette tape recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a protective cover device for a magnetic head in a cassette tape recorder in which a cassette is attached to the front of the front panel of the cassette tape recorder body.

Conventionally, in this type of cassette tape recorder, the magnetic head was disposed at the front of the front panel.The magnetic head was connected to the front panel via a hinge and covered by a rotatable head lid. It has become.

However, in the conventional type, the heladium lid was rotatable relative to the front panel, but could not be removed.

However, the head lid obstructs maintenance work such as cleaning or demagnetizing the magnetic head, making the work complicated, and the cleaning work of the head lid itself is also complicated.

In view of these circumstances, this invention makes the head lid removable from the cassette tape recorder body, making it easy to clean or demagnetize the magnetic head, and furthermore, when the magnetic head is blocked, the head lid The lid can be kept in a locked state, and rotation can be restricted to prevent the head lid from swinging inadvertently, and it can also be used as a side cover for the magnetic head, reducing the number of parts, simplifying the structure, and assembling. The purpose of the present invention is to provide a protective cover device for a magnetic head in a cassette tape recorder that can improve workability when the head lid is provided with a first hinge member, and the front panel A second hinge member is provided on the head cover fixed to the first hinge member. The second hinge member is connected in a detachable manner so that the head lid can be removed from the front panel. A projection is provided on one of the second hinge members, and a locking elastic piece having a locking portion that locks onto the projection is provided to elastically lock the head lid in a predetermined position. In addition, the above-mentioned No. 1. The present invention is characterized in that at least one part of the second hinge member also serves as a side cover.

This invention will be explained below based on embodiments shown in the drawings.

Figures 1a and 1b are a front view and a right side view of a main part of a cassette tape recorder using the magnetic head protective cover device of this invention, respectively, and the cassette tape recorder main body 1
For example, in the figure, a cassette (not shown) is adhered to the front part of the front panel 2 in an upright position on the left side of the front panel 2.

That is, reel shafts 3, 3 are protruded from the front part of the front panel 2, and a sensor cover 4, which has a cross-sectional shape and an opening at the bottom, is attached to the upper blade of the reel shaft 3.3. Inside the sensor cover 4 are apertures for preventing accidental erasure of the cassette, and sensor pieces 5, 5 for detecting the apertures provided in cassettes using chrome (CrO2) tape and for detecting the type of tape. A plate spring 4a is also provided for urging the cassette downward.

Further, below the reel shafts 3, 3, two magnetic heads 6, 6 for recording and playback and erasing, and a pinch roller (not shown) are installed so as to protrude toward the front of the front panel 2. A movable head base is disposed together with an idle pin that guides the cassette when it is loaded, and a holding roller that is engaged with the cassette reference hole and holds the cassette when the cassette is loaded.

(None of these are shown in the figure) These magnetic heads 6.6, pinch rollers, guide pins, holding rollers, etc. are fixed to both ends of the lower edge of the opening 11 in the front part of the front panel 2, as shown in FIG. a head cover 7, a second hinge member 9 fixed to the head cover 7 and serving also as a side cover;
9, a first hinge member 23 that is rotatably locked to the second hinge members 9, 9 and is detachable;
Head lid 8 fixed to this first hinge member 23
It is covered and protected by

In addition, as shown in FIG. 1, the front part of the front spring 2 has a
power switch 43, tape counter 44, operation button 46,
A meter 47 etc. are provided.

As shown in FIG. 3, the second hinge members 9, 9 have an upright portion 12 parallel to the surface of the front panel 2, and
It is composed of a horizontal portion 13 extending in the horizontal force direction at the lower end thereof, and a side wall portion 14 perpendicular to the upright portion 12 and the horizontal portion 13 on one side.

The upright part 12 has an opening 11 in the front panel 2 on the upper back side.
A screw hole 1 is formed with a stepped portion 15 that engages with the lower edge of the screw hole 1, into which a screw 16 for fixing to the front panel 2 is inserted into both ends of the lower part.
7 and 17 are formed.

In addition, the side wall portion 14 has a shaft 18 protruding from the inner surface of the approximately central portion for rotatably holding the first hinge member 23, and a shaft 18 for controlling the rotation of the first hinge member 23 from the inner surface of the lower portion. A protrusion 19 having a circular cross section is provided in a protruding manner.

Further, the horizontal portion 13 is formed with a screw hole 22 into which a screw 21 for fixing both ends of the horizontal portion 20 of the helad cover 7 having a cross-sectional shape is inserted.

Thus, the second hinge members 9, 9 and the head cover 7 are fixed to the front panel 2 by the screws 16 and 21.

Further, as shown in FIG. 4, the first hinge member 23 has inclined surfaces 26, 26 and a circular concave portion 2 at its lower end.
5 and 25, and a pair of engaging elastic pieces 24 and 24 that engage with the shaft 18 of the second hinge member 9 are formed.

Furthermore, an inclined surface 28 is provided on the outer surface of the engaging elastic piece 24.
, is formed at the arcuate surface 29 and the boundary between these surfaces, and the second
Locking elastic pieces 27 each having a stepped portion 30 (locking portion) that locks the protrusion 19 of the hinge member 9 are formed.

Furthermore, a boss portion 35 having a projection 34 and a through hole 36 for fixing the heladolid 8 is formed at the upper end.

- The head lid 8 has a U-shaped cross section as shown in FIG. A locking hole 32 and a fixing hole 33 are formed, and by engaging these projections 34 with the locking hole 32 and screwing a tapping screw 37 passing through the through hole 36 into the fixing hole 33, the first hinge member 23 The lid 8 is fixed to the lid 8.

Further, the back surface 31 of the head lid 8 has cutouts 38 to 42 for escape of the pinch roller, guide pin, holding roller, etc. when the second hinge member 9 rotates about the shaft 18. is formed.

Next, the operation of this protective cover device will be explained.

First, when using a cassette tape recorder to protect the chair, magnetic head 6.6, etc., the head lid 8 is rotated clockwise in FIG. 2 so that the magnetic head 6.6 is protected as shown in FIG. Make it cover 6.

In this state, the upper, front, lower, and side forces of the magnetic head 6, 6, etc. are all covered by the head lid 8, head cover 7, and second hinge members 9, 9, preventing dust from adhering to the magnetic head 6, 6, etc. Depression can be prevented.

In this state, the step part 30 of the locking elastic piece 27 of the first hinge member 23 is moved to the second position by its elastic action.
By elastically engaging with the protrusion 19 of the hinge member 9, the first hinge member 23 can be rotated clockwise and counterclockwise in the so-called click state in FIG. 2a. is lightly blocked.

Moreover, in this state, the lower end of the first hinge member 23 is in contact with the upper end of the upright portion 12 of the second hinge member 9, so that clockwise rotation is completely prevented. It will not rotate more clockwise.

In this way, the state shown in FIG. 2a is maintained, and the head lid 8 reliably covers and protects the magnetic head 6, 6, etc., and does not inadvertently swing due to vibration or the like.

Next, a usage state in which the head lid 8 is opened in order to mount the cassette in a predetermined position will be described.

First, the head lid 8 is forcibly rotated counterclockwise in FIG. 2.

Then, the locking elastic piece 27 of the first hinge member 23 is elastically deformed, and the engagement between the stepped portion 30 and the protrusion 19 of the second hinge member 9 is released.

Thus, the first hinge member becomes rotatable in the counterclockwise direction and is rotated to the tilted state shown in FIG.

In this state, a portion of the first hinge member 23 comes into contact with the upper end of the head cover 7, so that this state is maintained and the cassette can be mounted.

By mounting the cassette and operating the operation button 46, the head base is moved upward and the magnetic head 6.6 is brought into contact with the tape of the cassette to perform recording, playback, etc.

In addition, when removing the head lid 8 for maintenance work such as cleaning and demagnetizing the magnetic head 6.6 and the pinch roller, the head lid 8 should be removed in the state shown in Figure 2.
is pulled up to the upper blade, the engaging elastic pieces 24, 24 of the first hinge member 23 are elastically deformed and expanded, and the circular concave portions 25, 25 are engaged with the shaft 18 of the second hinge member 9. The head lid 8 can be removed from the head cover 7, that is, the front panel 2.

Therefore, the magnetic head 6.6, pinch rollers, etc. are exposed without being obstructed by the head lid 8, and cleaning operations can be easily performed. Also, the head lid 8 can be easily cleaned, and its attachment and detachment operations can be performed easily. It can also be done easily.

That is, to attach the head lid 8, align the engagement elastic pieces 24, 24 of the second hinge member 23 with the shaft 18 of the first hinge member 9, and then move the head lid 8 downward. This can be easily accomplished by simply suppressing the pressure, and is excellent in maintenance work and manufacturing workability as described above.

Further, since the first hinge member 9 also serves as a side cover, the number of parts is small, the structure is simple, the assembly workability is excellent, and the structure can be constructed at low cost.

As explained above, according to the protective cover device for the magnetic head in the cassette tape recorder of this invention, the head lid is configured to be detachable from the front panel, so cleaning or demagnetizing the magnetic head, pinch roller, etc. The maintenance work can be easily performed, and the assembly work at the time of manufacturing can also be simplified. In addition, by providing an elastic conduction regulating portion on the hinge member that connects the head lid in a rotatable and engageable/disengageable manner. Inadvertent swinging of the head lid can be prevented, and furthermore, if the hinge member also serves as a side cover, the number of parts can be reduced, the assembly work can be further simplified, and manufacturing can be done at low cost. It has the following effects.

[Brief explanation of the drawing]

The figures show one embodiment of this invention, and FIGS. 1a and 1b are a front view and a side view of a main part of a cassette tape recorder body 1 using this invention, respectively, and FIG. FIG. 3a is an enlarged sectional view of a main part of the line of sight in FIG. 2a, showing a state where the head lid 8 is tilted. b, c are the left side view, front view, and right side view of the second hinge member 9, and FIGS. 4a and 4b are the first hinge member 2, respectively.
3 right side view, rear view, Figure 5a. b is a plan view and a rear view of the head lid 8, respectively. 1...Cassette tape recorder body, 2...
...Front panel, 6,6...Magnetic head, 7
...Head cover, 8...Head lid, 9...Second hinge member, 18...
- Shaft, 19...Protrusion, 23...First hinge member, 24...Engaging elastic piece, 25...
......Circular recess, 27...Elastic piece for locking,
Locking part (step part). 30...

Claims (1)

[Claims for Utility Model Registration] 1. A cassette tape recorder in which a cassette is attached to the front of the front panel of the main body, which includes a head lid to which a first hinge member is attached, and a second hinge member fixed to the front panel. The head lid cover and the head cover cover and protect the magnetic head disposed in the front part of the front panel, and the head lid is rotatable and the head cover is attached to the front panel. 1. A protective cover device for a magnetic head in a cassette tape recorder, characterized in that the cover device can be freely engaged with and detached from a cover. 2 Said No. 1. A request for registration of a utility model characterized in that the second hinge member is provided with a protrusion on either side, and is provided with a locking elastic piece having a locking portion that is externally locked to the projection. A protective cover device for a magnetic head in a cassette tape recorder according to item 1. 3. 1. above. According to claim 1 or 2 of the utility model registration claim, at least one of the second hinge members doubles as a side cover that covers the side of the magnetic head. A protective cover device for the magnetic head in a cassette tape recorder.