JPH0244331Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a magnetic head cleaning device that is used by being loaded into a tape recorder or the like.

(Prior Art) Conventionally, when cleaning a magnetic head of a tape recorder or the like, it has been common to soak a cotton swab or a cleaning pen in a cleaning liquid and wipe the head.

However, these days, the mechanisms and structures around magnetic heads have become more complex, making it difficult to wipe them off with cotton swabs, etc. Especially in the case of car stereos, etc., where the magnetic head is located inside the case, this is difficult. is extremely difficult to clean.

Therefore, the present inventor proposed a device that could automatically clean the magnetic head by using the rotation of the reel drive shaft by loading it into a tape recorder (Utility Model Application No. 57-168839).
However, it may be inconvenient to use with an auto-reverse tape recorder.

Recently, a gear-shaped transmission member is disposed between two gear-shaped rotating members that rotate by engaging with the hub engaging pawl of the reel drive shaft to interlock the two rotating members. There has also been proposed a structure in which the operating lever is swung by a cam portion, and the wiping member engaged with the operating lever is slid by the swinging of the operating lever, thereby cleaning the magnetic head. However, the engagement structure between the transmission member and the actuation lever is complicated, and in order to arrange the wiping member, the wiping member holder part is integrally molded on the actuation lever via a thin spring part. However, with this method, it is troublesome to set the spring force to bring the wiping member into contact with the magnetic head.
There is a drawback.

(Purpose of the invention) The purpose of the invention is to eliminate the above-mentioned conventional drawbacks, improve the previously proposed magnetic head cleaning device, and in particular create a magnetic head cleaning device that is most suitable for use in auto-reverse type devices. It is about providing.

(Structure of the invention) The present invention consists of two gear-shaped rotating members that are disposed inside the cassette half and rotate by engaging with the hub engaging pawl of the reel drive shaft, and a rotating member that rotates both gears in order to interlock the two rotating members. A magnetic head consisting of a gear-shaped transmission member arranged between members, an operating lever that swings as the reel drive shaft rotates, and a wiping member that wipes the magnetic head by swinging the operating lever. In the cleaning device, one of the rotating members is provided with a ring-shaped stepped portion around the circumference, and a cam pawl is formed on the ring-shaped stepped portion in a circumferential manner, and the rotary member is operated to swing about a shaft at the rear end as a fulcrum. A lever is arranged and urged by a leaf spring so that it always slides into contact with the stepped portion, and is oscillated by the cam pawl, and a lever is provided on the front side of the cassette half to accommodate the oscillation of the operating lever. A wiping member that is linearly driven is disposed, and the wiping member includes a base plate having a square hole in the center and guided by a guide groove, a case fitted in the square hole, and an opening at the tip of the case. a wiping piece replaceably inserted into the case; a wiping piece disposed inside the case and having a concave front surface;
The wiping piece is constructed with a weak spring that biases the wiping piece so that it always comes into close contact with the magnetic head.

(Example) Embodiments of the present invention will be described based on the drawings.

In the figure, 1 is a cassette half, and in this embodiment, a lower case 1A and an upper case 1 have the same size and shape.
In the figure, 2 and 2' are reel drive shaft insertion holes, and 3 is a magnetic head insertion hole.

Reference numerals 4 and 4' denote two rotary members that are rotatably provided within the cassette half body so as to correspond to the reel drive shaft insertion holes 2 and 2'. An engaging pawl 5 that engages with a hub engaging pawl (not shown) of the drive shaft is formed, and a ring-shaped stepped portion 6 is formed on one side, and three cams are provided on the stepped portion 6. The claws 7 are provided in a protruding manner.

Reference numeral 9 denotes a transmission member for interlocking the rotating members 4, 4', which is in the shape of a gear, and is disposed between the rotating members 4, 4' and has a toothed portion 1 on the outer periphery.
0 meshes with the teeth 8 of the rotating members 4, 4' to rotate.

Reference numeral 11 denotes an operating lever provided within the cassette half body so as to swing with the rotation of the rotating members 4, 4', which swings about the rear end shaft 11a as a fulcrum; A forked engagement portion 12 is formed at the tip. This operating lever 1
1 is biased by a leaf spring 13 so that one side thereof is always in sliding contact with the stepped portion 6 of the one rotating member 4', and is swung by a cam pawl 7 as the rotating member 4' rotates. It is composed of

Reference numeral 14 denotes a wiping member for cleaning the magnetic head, which is slidably provided in the magnetic head insertion slot 3 and engaged with the engaging portion 12 at the tip of the operating lever 11 for operation. It is adapted to slide in the horizontal direction by swinging the lever 1.

This wiping member 14 includes a base plate 15 having a square hole in the center, and a case 16 fitted into the square hole.
and a wiping piece 17 made of felt or the like that is replaceably inserted into the tip opening 16a of the case 16.
and a weak coil spring 18 for keeping the wiping piece 17 in close contact with the magnetic head at all times, and the coil spring 18 is connected to the case 16.
It is stored inside. An engaging portion 15a formed by a notch is formed at one end of the base plate 15, and the engaging portion 12 of the actuating lever 11 is engaged with this engaging portion 15a. The wiping piece 17 is impregnated with a cleaning liquid.

The base plate 15 is fitted into upper and lower guide grooves 19, 19 provided in the cassette half 1, and is slidable in the horizontal direction. 20,
Reference numeral 20 denotes a wiping member for cleaning a capstan, etc., and a wiping piece 2 for the capstan.
1 and a pinch roller wiping piece 22,
Pinch roller fitting opening 2 of the above cassette half 1
3 are arranged interchangeably. The capstan wiping piece 21 and the pinch roller wiping piece 22 are held by being held by gripping claws 20a provided on the wiping member 20, and are impregnated with a cleaning liquid.

In the figure, 24 is a capstan hole, 25 is a reinforcing pin, 26 is a shaft of the transmission member 9, and 27 is a support pole for the leaf spring 13.

Next, an example of operation will be explained. When loaded into a tape recorder like a normal cassette tape, the engaging claws 5 of the rotating members 4, 4' engage with the hub engaging claws of the reel drive shaft. When the tape recorder is operated in this state (driving the right reel drive shaft), the rotation of the reel drive shaft rotates the rotating member 4' that meshes with the reel drive shaft. When the rotary member 4' rotates, the cam pawl 7 provided on the stepped portion 6 comes into contact with one side of the actuating lever 11, which is constantly pressed by the leaf spring 13, and each time the actuating lever 11 moves toward the shaft 11.
It swings around a. As the operating lever 11 swings, the wiping member 14 slides horizontally along the guide groove 19, and the wiping piece 17 properly and automatically cleans the magnetic head.

Next, when auto-reverse is performed in the above state to drive the left reel drive shaft, the rotating member 4 rotates, and the other rotating member 4' rotates through the rotation of the transmission member 9 that meshes with the rotating member 4. As the rotating member 4' rotates, the operating lever 11 swings as described above, and the wiping member 14 slides to clean the magnetic head.

Note that when the cassette half 1 is loaded into the tape recorder, the capstan inserted into the capstan hole 24 is removed by the capstan wiping piece 21.
The pinch roller is set in close contact with the pinch roller wiping piece 22. When the tape recorder is operated in this state, the surface of the capstan is cleaned by its rotation, and the pinch roller rotates in close contact with the pinch roller wiping piece 22, thereby cleaning its surface.

(Effects of the invention) According to the magnetic head cleaning device of the invention, when a tape is loaded into a tape recorder in the same way as a normal cassette tape and the tape recorder is put into play mode, the magnetic head cleaning device engages with the hub engaging pawl of the reel drive shaft. The two rotating members that rotate together are rotated together by the transmission member, which causes the operating lever to swing and slide the wiping member, so that the magnetic head that is in pressure contact with the wiping member can be properly adjusted. One can be cleaned automatically.

In this case, the actuating lever is biased so that its one end always comes into sliding contact with a ring-shaped stepped portion provided around one rotating member, and is swung by a cam pawl that protrudes circumferentially from the stepped portion. Since the wiping member is configured to ,
It is composed of a wiping piece that is replaceably inserted into the opening at the tip of the case, and a weak spring that is placed inside the case and biases the wiping piece so that it always comes into close contact with the magnetic head. Therefore, it is easy to set the spring force that brings the wiping member into contact with the magnetic head.

Further, the wiping member 14 is driven linearly by the swinging of the operating lever 11, and the magnetic head is moved to the wiping piece 1.
Since the wiping piece 17 is wiped linearly at step 7 and has a concave front surface, the wiping member rotates relative to the magnetic head like the conventional one, and the tip of the wiping member has a rounded shape. Unlike conventional methods, the entire magnetic head can be thoroughly cleaned.

[Brief explanation of the drawing]

The drawings show an embodiment of the magnetic head cleaning device according to the present invention, in which FIG. 1 is a perspective view of the entire device with a part cut away, FIG. 2 is a cross-sectional view of FIG. 1, and FIG. 3 is a cross-sectional view of FIG. 1. FIG. 4 is a perspective view showing the operating state of the wiping member, and FIG. 5 is a sectional view showing the sliding movement of the wiping member. 1: Cassette half, 2, 2': Reel drive shaft insertion hole, 3: Magnetic head insertion port, 4, 4': Rotating member, 9: Transmission member, 11: Operating lever, 14:
Wiping member.

Claims (1)

[Claims for Utility Model Registration] Two gear-shaped rotating members arranged in the cassette half and rotating by engaging with the hub engaging pawl of the reel drive shaft, and both rotating members for interlocking the two rotating members. A magnetic head cleaning device consisting of a gear-shaped transmission member disposed between, an operating lever that swings as the reel drive shaft rotates, and a wiping member that wipes the magnetic head by swinging the operating lever. In the device, one of the rotating members 4 and 4', 4', is provided with a ring-shaped stepped part 6, and a cam pawl 7 is formed on the ring-shaped step part 6 in a circumferential manner, and a shaft 11a at the rear end is connected to the ring-shaped step part 6. An operating lever 11 is arranged so as to swing as a fulcrum, and a leaf spring 13 is arranged so as to be in sliding contact with the stepped portion 6 at all times.
A wiping member 14 is disposed on the front side of the cassette half 1 and is linearly driven by the swinging of the operating lever 11. The member 14 includes a base plate 15 having a square hole in the center and guided by guide grooves 19, 19, a case 16 fitted into the square hole, and a case 16 that is replaceably inserted into the opening at the tip of the case. a wiping piece, and a wiping piece 17 disposed inside the case and having a concave front surface.
and a weak spring 18 for biasing the wiping piece 17 so that it always comes into close contact with the magnetic head.