JPH03189952A - Magnetic recording and reproducing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tape loading mechanism for a magnetic recording/reproducing device such as a VTR.

Conventional technology FIG. 6 shows a tape path of a magnetic recording/reproducing device.

In FIG. 5, a cassette 1 has a pair of reels (not shown) therein, and a magnetic tape 2 (hereinafter referred to as tape) is wound therein. Reel stands 3 and 4 engage with the reel and rotate together. 11 is the base 34
This is a long hole provided at the top. A tape post 13 is supported and fixed to the base 12. The base 12 engages with the elongated hole 11 and is movable along the elongated hole. A post stopper 14 supports the tape post 13 at a predetermined position. A rotating drum 49 is equipped with a magnetic head (not shown) for recording and reproducing information on the tape 2.

Figures 6 and 7 show means for moving the base. In FIG. 6, reference numeral 18 denotes a support shaft installed on a base 34, around which gears 17 and 22 are rotatably locked. 19 and 20 are hv on the arm,
Each arm is rotatably fixed with a pin 21.

One end of an arm 19 is fixed to the gear 17, and one end of the arm 20 is rotatably locked to the base 712. 23 and 24 are arms, and each arm is rotatably fixed with a pin 26. One end of an arm 23 is fixed to the gear 22, and one end of the arm 24 is rotatably locked to the base 12. Another gear 26 is formed coaxially with the gear 22 and rotates together. 27 is a sector gear having a gear portion that meshes with the gear 26; a support shaft 28;
It has a pin 29 which is rotatably locked around it. 30
is a gear with a cam, which is rotatably locked around a support shaft 31 and has a cam groove 32 that engages with the pin 29 .

The cam gear 30 is configured to rotate in response to rotation of a motor (not shown).

With the above configuration, when the motor (not shown) is rotated and the cam gear 3o is rotated counterclockwise around the support shaft 31, the sector gear is rotated clockwise, the gear 22 is rotated counterclockwise, and the gear 17 is rotated clockwise. Rotate. As a result, base 1
2 is a long hole 11 with a link mechanism composed of an arm and a pin.
will move along.

FIG. 7 shows a state in which the base 12 has been moved along the elongated hole to a predetermined position. At this time, the tape post 13 is pressed against and supported by the post nut soper 14 to form a predetermined tape path. The base 12 can be returned by rotating the motor in the opposite direction. Further, the motor can be driven with high precision by a position detection switch (not shown) that is interlocked with the cam gear 30.

FIG. 4 is a sectional view of a tape post, a base, and a slot of a conventional magnetic recording/reproducing device. Pages 7 and 12 have surfaces 12a and 12a' larger than the width of the long hole from above and below through the long hole 11.
It has a boss portion 12b between which it can move without coming out of the elongated hole.

6 Base/Problems to be Solved by the Invention However, in the above configuration, since the long hole formed in the base and the base slide, grease or the like is applied to the part where the long hole and the base come into contact to achieve smooth operation. It is necessary to apply lubricant. When pulling out a tape from the tape cassette to form a tape path or storing the tape in the cassette, if the tape tension is weak, the tape will fall from the tape post, and grease will adhere to the tape, damaging the tape.

Additionally, if grease adheres to one end of the tape, the next time the tape is pulled out of the cassette or stored, the grease will adhere to the tape post, rotating drum, and other running parts, causing head clogging. It had become. Furthermore, during assembly and maintenance work during service, there was a problem in that the workability was poor when the workers applied grease on their hands, etc. 〇Means to solve the problemTo solve the above problem The magnetic recording and reproducing apparatus of the present invention includes a six-vane cassette having a magnetic tape wound therein, a rotating drum equipped with a head for recording and reproducing information on the magnetic tape, and a long hole formed in a base having a width of a base that is movable along the long hole and is a member that engages with the long hole so as to sandwich the long hole from the top and bottom of the base with a larger surface; A tape post for pulling out a magnetic tape and winding the magnetic tape around a rotating drum to form a predetermined tape path; and means for moving the base; It has a structure in which solid members having lubricating properties are fixed to the base on the upper and lower surfaces of the base that come into contact with the base as it moves. Furthermore, instead of fixing a solid member having lubricity to the base, the solid member having lubricity is fixed to the surface of the base that contacts the elongated hole.

Effect: By using the above method, a solid lubricating member is interposed in the part where the elongated hole and the base come into contact, and grease, which is conventionally applied to improve sliding properties, is used. A smooth loading operation can be achieved without any trouble.

In addition, since no grease is required, even if the tape falls onto the board in the event of an abnormality, there will be no grease adhering to the tape, and the tape will not be damaged, and the running system will not get dirty or the head will become clogged due to grease. do not. Furthermore, it is possible to improve work efficiency during assembly and service.

Embodiment FIG. 1 is a sectional view of the base and elongated hole of a magnetic recording/reproducing apparatus according to the first embodiment of the present invention. In Figure 1, 11-1
3, 20, and 34 are the same as in the conventional example. 35 is the base 34
This is a solid lubricating member fixed to the upper and lower surfaces of the base plate 34 along the elongated holes 11.

Since the base 12 and the base plate 34 are in contact with each other via the lubricating member 35, the base can smoothly move along the elongated hole without using grease as in the conventional case.

FIG. 2 is a perspective view of the base and the elongated hole. The solid lubricating member can be realized by applying molybdenum or the like to the surface of the base and fixing it. Alternatively, a seal-like member with lubricity and adhesive backing may be used to attach it to the substrate. Furthermore, in this example, the lubricating member was fixed to the inner side surface of the elongated hole, but depending on the lateral pressure acting on the base, it may not necessarily be necessary to fix the lubricating member to the inner side surface of the elongated hole. .

FIG. 3 is a sectional view of the base and elongated hole of a magnetic recording/reproducing device according to a second embodiment of the present invention. In Figure 3, 11-1
3, 20, and 34 are the same as in the conventional example. In this embodiment, the lubricating members include the surfaces 12a and 12a' of the base and the boss portion 12.
It is fixed at b. This embodiment has the advantage that the amount of lubricating member may be smaller than that of the first embodiment.

Effects of the Invention As described above, according to the present invention, the tape post can be moved smoothly without applying grease, improving workability and serviceability. In addition, when the tape falls onto the board during an abnormal tape loading operation, there is no chance of grease getting on the tape, damaging the tape, staining the running parts, and causing head clogging. This has the effect of preventing secondary failures in the event of an abnormality.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the long hole portion of the base and the base in a magnetic recording/reproducing device according to the first embodiment of the present invention, FIG. 2 is a perspective view of the long hole portion of the base and the base in the same embodiment, and FIG. 4 is a cross-sectional view of the long hole portion of the base and the base in a magnetic recording/reproducing device according to the second embodiment of the present invention. FIG. 4 is a cross-sectional view of the long hole portion of the base and the base in a conventional magnetic recording/reproducing device. Fig. 6 is a plan view of the tape panel of the conventional example, Fig. 6 is a plan view of the tape loading mechanism of the conventional example before the tape is pulled out, and Fig. 7 is a plan view of the tape running state in the tape loading mechanism of the conventional example. be. 1...Cassette, 2...Magnetic tape,
3... Reel stand, 4... Reel stand, 1
1...Long hole, 12...Base, 13.
... Tape post, 14 ... Post Nutsoper, 34 ... Base, 35 ... Lubricating member, 49 ... Rotating drum.

Claims (2)

[Claims] (1) A cassette with a magnetic tape wound inside;
A rotating drum equipped with a head for recording and reproducing information on the magnetic tape and a surface larger than the width of the long hole provided in the base engage with the long hole so as to sandwich the long hole from the top and bottom of the base. a base that is a member and is movable along a long hole; a tape post that is fixed to the base and that pulls out a magnetic tape in a cassette and winds the magnetic tape around a rotating drum to form a predetermined tape path; The base is provided with means for moving, the shape of the elongated hole is configured along the locus in which the base should move, and solid members having lubricity are fixed to the base on the upper and lower surfaces of the base that come into contact with the base as the base moves. A magnetic recording/reproducing device characterized by: (2) The magnetic recording/reproducing device according to claim 1, wherein a solid member having lubricating properties is fixed to the surface of the base that contacts the long hole.