CN86210363U

CN86210363U - Electric phonograph using magnetic disc

Info

Publication number: CN86210363U
Application number: CN 86210363
Authority: CN
Inventors: 何文冲
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-12-13
Filing date: 1986-12-13
Publication date: 1987-11-07

Abstract

The utility model relates to a phonograph using magnetic discs, which belongs to the technical field of electroacoustics. A disc of a common phonograph is changed into a plastic magnetic disc by the utility model, wherein, both sides of the plastic magnetic disc are provided with guide grooves and magnetic tracks. An adapter of the common phonograph is replaced by a magnetic head, the elementary structure of which is the same as the structure of a three-in-one type common magnetic head. Countervanes on the magnetic head are arranged in the guide grooves of the magnetic disc, so that the magnetic head can make a spiral motion corresponding to the magnetic disc. Sound recording, sound playing and sound erasing can be realized. Content wanted to hear is also conveniently found. The utility model can be made into a complete machine with a recording and playing circuit, and can also be combined with a common radio recorder to use. The utility model can realize stereo sound and can also be made into a multifunctional phonograph by combining with the common phonograph in one.

Description

Electric phonograph using magnetic disc

The utility model belongs to the electroacoustic techniques field

The common electrical phonograph is to adopt disc to come the recording playback sound at present, and its shortcoming is that the content of recording can not arbitrarily change.

The purpose of this utility model is, the disc of common electrical phonograph changed into have spiral fluted polymer garden disk, utilizes three-in-one common magnetic head to replace lifting the sound device in the common phonograph.During work, three-in-one magnetic head is moved along the helicla flute on the disk, thereby reach both arbitrarily recording, playback, erasure, can find the content that to listen easily again.

Below in conjunction with description of drawings the utility model and embodiment thereof.

Accompanying drawing 1 is the vertical view of disk.

Accompanying drawing 2 is part section enlarged drawings of disk.

Accompanying drawing 3 is magnetic head structure synoptic diagram.

Magnetic head was placed on the partial enlarged drawing on the disk when accompanying drawing 4 was work, this graph expression magnetic head with respect to the position of disk relation.

Accompanying drawing 5 is structural representations of realizing stereosonic magnetic head.

Accompanying drawing 6 is disk electric phonograph structural representations.

The utility model is made up of disk 1, magnetic head 4, housing and disk drive mechanism.It is characterized in that the basic structure of magnetic head 4 is identical with the three-in-one formula magnetic head of common radio cassette player, and guide groove 2 and magnetic track 3 are arranged on the disk 1, during work, magnetic head is made screw movement with respect to disk.

The utility model disk 1 is characterised in that this disk is a polymer garden dish, and there is hole, a garden at its center, has spiral guide groove 2 on two surface, and the surface 3 between guide groove is coated with magnetic material, and this surface is a magnetic track.Magnetic track is used for the recording playback signal.Minute the one side longest run time T=(R-r of this disk)/n(M+G), wherein R is a magnetic track outmost turns radius, and r is inner lane radius, and n is a rotations per minute, and M is a track width, and G is that guide groove is wide.The disk revolution should be 5～6 rev/mins, its objective is make on the disk with magnetic head contact position linear velocity size suitably, be beneficial to recording quality.

As shown in Figure 3, the utility model is used for recording, puts, the magnetic head 4 of erasure is identical with the three-in-one magnetic head basic structure of common radio cassette player, and material is identical, and magnetic head iron core thickness equates with track width.And fixes a countervane 5 in a side of three-in-one common magnetic head iron core, and this countervane adopts hard, wear-resisting, non-magnet_conductible material to make.It is targeting parts that countervane has an apiculus 6, during work (as shown in Figure 4), targeting part is put into guide groove, magnetic head is pressed on the magnetic track, countervane is attached to the side of magnetic head towards the disk garden heart, its thickness is slightly littler than guide groove, and it is dark that the targeting part height also is slightly smaller than guide groove, and targeting part can be slided in guide groove.

Disk drive part of the present utility model can adopt the drives structure of common electrical phonographic record.

The utility model can be changed a social system by the common electrical phonograph.

The pick-up head of electric phonograph acoustic pickup is dismantled, on the relevant position, open a suitably big or small hole, top described magnetic head 4 is fixed in (as Fig. 6) in the hole, connect the magnetic head circuit again.Suitable for the revolution that makes phonograph, can adopt a Low speed electric motor that can make 5～6 rev/mins of disks.Disc with common phonograph changes aforesaid disk into again.

The utility model can make the independently complete machine that has playback circuitry, also can make by magnetic head output (playback) input (recording), with the form of common radio cassette player coupling, as long as insert radio cassette player magnetic head circuit with two two line plugs 4.

The utility model also can be realized stereo, as long as magnetic head is made two parts 7,8 lumps together (as shown in Figure 5), inserts the two-channel circuit again and gets final product.

The utility model also can be integrated with common phonograph, makes multi-functional phonograph, needs only the bottom gear ， And that adds 5 rev/mins on common phonograph again and the plug of magnetic head and pick-up head is made the form that can exchange.

The utility model is compared with common phonograph, and recorded content can be changed, Compare with tape recorder, have simple in structure, without rewinding, the advantage that cost is low, easy to manufacture.

Claims

1, a kind of disk electric phonograph of forming by housing, disk, magnetic head and disk drive mechanism, it is characterized in that the basic structure of magnetic head is identical with the three-in-one formula magnetic head of common radio cassette player, and guide groove and magnetic track are arranged on the disk, during work, magnetic head is for the helical movement with respect to disk.

2, disk electric phonograph according to claim 1 is characterized in that described disk is a polymer garden dish, and there is hole, a garden at its center, has spiral guide groove on two surface, and the surface between guide groove is called magnetic track, is coated with magnetic material on the magnetic track surface.

3, disk electric phonograph according to claim 1 is characterized in that fixing a countervane on described magnetic head, this countervane is made by hard, wear-resisting, non-magnet_conductible material.