JPH0586195U - Cassette tape drive - Google Patents

Abstract

(57) [Abstract] [Purpose] Prevents electric and magnetic noise generated from a flywheel drive motor from entering a magnetic head or a conductor for guiding a recording or reproducing signal from the magnetic head and reducing the overall size. Achieve a reduction in size and thickness. [Structure] The cassette tape drive is a flywheel 6
A motor 8 for driving the flywheel 6 to rotate, a conductor 10 for transmitting a recording / reproducing signal from a magnetic head, and a substrate 1. The body portion 8a of the motor 8 is arranged between the flywheel 6 and the substrate 1. At least one end portion 1a of the substrate 1 may be a partition portion that partitions the motor 8 and the conductor 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a cassette tape recorder, and more particularly to a mounting structure of a motor for rotating a flywheel integrally fixed with a capstan shaft.

[0002]

[Prior Art]

 In recent years, in order to standardize the cassette tape recorder and reduce the cost, it is possible to use a common cassette tape recorder for a portable radio tape player (radio cassette) and a stationary tape player (so-called tape deck). It has become a very common practice. Therefore, making the cassette tape recorder thinner and smaller overall is a very important design point for increasing the commercial value. When designing a cassette tape recorder, the layout of the flywheel, reel stand, head, etc. is not specified because the standard of the cassette tape is known, but there is almost no design freedom. There is considerable freedom in the placement of the motor. However, the motor mounting position of the cassette tape recorder that has been generally used in the past is such that the supply and take-up reel stand for driving the magnetic tape, the recording / reproducing magnetic head are mounted, and the magnetic tape can be moved in and out of contact with the magnetic tape. Since it is usually mounted on the outside of the board for mounting a head base, etc. using a separate bracket, etc., it is usually mounted on a flywheel retaining bracket, so the overall size is smaller and thinner. Was hindering the achievement of

Details of a conventional cassette tape drive device of this type will be described with reference to FIGS. 3 is a plan view of the cassette tape recorder in which the flywheel rotating motor is mounted on the outside of the substrate by using a separate bracket, and FIG. 4 is a side view of the cassette tape recorder shown in FIG. FIG. 5 is a plan view of a cassette tape recorder in which a flywheel rotation motor is attached to a flywheel retaining bracket. 6 is a side view of the cassette tape recorder shown in FIG. 5, and FIG. 7 is a bottom view of the cassette tape recorder shown in FIG. First, a cassette tape recorder that is attached to the outside of the board by using a separate bracket will be described. 3 to 4, a chassis 1 is provided with a supply reel base 2 for driving a magnetic tape, a take-up reel base 3 rotatably mounted thereon, and a magnetic head 4 or the like mounted thereon so that the chassis 1 can be attached to or detached from the magnetic tape. This is a substrate for mounting the head base 5 which can be moved to the position. Further, reference numeral 10 is a conductor for guiding a recording or reproducing signal from the magnetic head 4. Next, the motor 8 is attached to the outside of the chassis 1 by a bracket 11, and is configured to rotate the flywheel 6 integrally fixed with the capstan shaft 9 by means of a belt 7.

Next, a cassette tape recorder in which the flywheel rotating motor is attached to the retaining bracket of the flywheel will be described. In FIGS. 5 to 6, a motor 8 for driving the flywheel 6 to rotate by a belt 7 is attached to a flywheel bracket 12 which is attached for preventing the flywheel 6 from coming off and protecting it.

[0005]

[Problems to be solved by the device]

 As described above, in the conventional cassette tape drive, the flywheel rotating motor is attached to the outside of the board by using a separate bracket or the like, or is attached to the retaining bracket of the flywheel. Since it is normal, it has hindered the achievement of overall miniaturization and thinning. Further, because of the structure as described above, the electric and magnetic noise generated from the motor is shielded between the motor and the recording / reproducing magnetic head or the conductor for guiding the recording / reproducing signal therefrom. Since there is no member, noise generated in the direction of arrow A as shown in FIGS. 3 and 6 directly enters the magnetic head or the conductor. For this reason, noise was recorded on the magnetic tape, or a noise sound was reproduced during reproduction, and was easily heard as an offensive sound.

Therefore, the present invention has been made to solve the above problems, and a magnetic head or a conductive material for guiding a recording / reproducing signal from the magnetic head without additional use of a special shielding plate or the like. An object of the present invention is to provide a cassette tape drive device that prevents electric and magnetic noise generated from a flywheel drive motor from entering the body and achieves miniaturization and thinning of the entire body.

[0007]

[Means for Solving the Problems]

 The cassette tape driving device of the present invention comprises a flywheel, a motor for driving the flywheel to rotate, a conductor for transmitting a recording / reproducing signal from a magnetic head, and a base plate. The main body of the motor is arranged between the flywheel and the substrate. Further, the invention is characterized in that at least one end of the substrate is a partitioning part for partitioning the motor and the conductor.

[0008]

[Action]

 In the cassette tape drive having the above-mentioned structure, the main body of the motor that rotationally drives the flywheel is arranged so as to be sandwiched between the flywheel and the substrate. Also, magnetic noise is blocked by the flywheel, the substrate, etc., and it is difficult for the magnetic noise to directly enter the magnetic head or a conductor for guiding a recording / reproducing signal from the magnetic head, and the overall thickness and size can be reduced. Also, if one end of the board is a partition that separates the motor from the conductor, the same effect as if a shield plate is provided between the motor and the conductor can be obtained, so the electric power generated by this motor Further, the magnetic noise is less likely to enter the magnetic head or the conductor for guiding the recording / reproducing signal from the magnetic head.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cassette tape drive device according to an embodiment of the present invention will be described below with reference to the drawings. 1 is a plan view showing an embodiment of the cassette tape driving device of the present invention, and FIG. 2 is a side view of the cassette tape driving device shown in FIG. Referring to these drawings, the chassis 1 as a substrate is made of a substantially rectangular conductive iron plate, an iron plate outsert with resin, or resin itself, and is a supply for driving a magnetic tape. A reel base 2 and a take-up reel base 3 are rotatably attached. Further, a head base 5 on which a magnetic head 4 and the like are mounted is also slidably attached to the chassis 1 so as to be movable so as to be detachable from and attachable to the magnetic tape. Further, reference numeral 10 is a conductor for guiding a recording or reproducing signal from the magnetic head 4. The conductor 10 is generally composed of a wire or a flexible substrate, and although not shown, a connector is attached to an end thereof and is configured to be coupled to the circuit of the set. It is normal. Next, the motor 8 is directly mounted on the surface of the chassis 1 opposite to the surface on which the head base 5 is mounted without using a special bracket or the like, and the capstan shaft 9 is integrally fixed. The flywheel 6 made of conductive zinc die-cast or iron plate outsert with resin or resin itself is driven to rotate by a belt 7. At this time, the main body portion 8a of the motor 8 is attached to the chassis 1 so as to be sandwiched between the chassis 1 and the flywheel 6, that is, shielded by these two parts. As described above, the motor 8 is attached to the chassis 1 with screws and the like without using a special bracket or the like, but it can be attached via a rubber insulator or the like for blocking the transmission of vibration. Good. Regarding the mounting position of the motor 8, the motor 8 is arranged so as to fit within the surface of the chassis 1 in the present embodiment, so that it is particularly effective for downsizing. Further, a partition portion 1a is processed on the substrate 1 so as to partition the motor 8 and the conductor 10. With such a configuration, the electric and magnetic noises generated from the motor 8 are shielded by the chassis 1, 1a and the flywheel 6, and the recording / reproducing magnetic head 4 or a recording / reproducing signal from the magnetic head 4 is guided. It is difficult to directly enter the conductor 10.

[0010]

[Effect of the device]

 According to the present invention, since the main body of the motor for rotating the flywheel is arranged so as to be sandwiched between the flywheel and the substrate, it is possible to reduce the thickness and size of the entire cassette tape drive device. On the other hand, the electric and magnetic noise generated by the motor is effectively shielded by the flywheel, the substrate, etc., and it is difficult to directly enter the magnetic head or the conductor for guiding the recording / reproducing signal from the magnetic head. Therefore, it is not necessary to attach a special shielding plate to prevent these noises, and thus noise can be prevented at low cost. Also, if one end of the board is a partition that separates the motor from the conductor, the same effect as if a shield plate is provided between the motor and the conductor can be obtained, so the electric power generated by this motor In addition, the magnetic noise has the effect of making it more difficult to enter the magnetic head for recording / reproducing or the conductor for guiding the recording / reproducing signal from the magnetic head.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a cassette tape drive device of the present invention.

FIG. 2 is a side view of the cassette tape drive device shown in FIG.

FIG. 3 is a plan view of a cassette tape driving device in which a flywheel driving motor is mounted on the outside of a conventional board using a separate bracket.

4 is a side view of the cassette tape drive device shown in FIG. 4. FIG.

FIG. 5 is a plan view of a cassette tape drive device in which a flywheel drive motor is attached to a conventional flywheel retaining bracket.

6 is a side view of the cassette tape drive device shown in FIG. 5. FIG.

FIG. 7 is a bottom view of the cassette tape drive device shown in FIG.

[Explanation of symbols]

 1 Chassis (Substrate) 1a Partition 4 Magnetic Head 6 Flywheel 8 Motor 8a Main Body 9 Capstan Shaft 10 Conductor

Claims (2)

[Scope of utility model registration request] 1. A cassette tape drive device comprising a flywheel, a motor for rotationally driving the flywheel, a conductor for transmitting a recording / reproducing signal from a magnetic head, and a substrate. A cassette tape drive device, wherein the cassette tape drive device is arranged between the flywheel and the substrate. 2. The cassette tape drive device according to claim 1, wherein at least one end of the substrate is a partition portion for partitioning the motor and the conductor.