JPH11340653A - Electronic unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb motor vibrations and to fix a motor in a small space. SOLUTION: A recessed part 21 storing a screw head part 14a is formed in motor fitting rubber 15 for avoiding the face of the screw head part 14a of a motor fitting screw 14, when the motor fitting screw 1 is screwed with a motor 11 protrudes from the tip face of motor fitting rubber 15. A groove part 22, to which a base member 16 is engaged, is formed at the outer periphery of motor fitting rubber 15. The screw head part 14a of the motor fitting screw 14 is stored in the recessed part 21, and the tip face of motor fitting rubber 15 except for the recessed part 21 becomes a part, which is nearest a belt 12 or a printed board 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device, and more particularly, to an electronic device characterized by a mounting portion of a motor for driving a driving unit.

[0002]

2. Description of the Related Art In a portable electronic device, for example, a tape recorder that records and reproduces sound or the like on a cassette tape, as shown in FIG. 5, a driving force of a motor 104 as a driving source causes a belt 103 to move from an output shaft thereof. Flywheel 10 through
1, a capstan shaft 102 is integrally fixed to the flywheel 101, the capstan shaft 102 is rotated, and a pinch roller (not shown) is pressed against the capstan shaft 102. The tape between the capstan shaft and the pinch roller is sent out.

A capstan gear (not shown) is provided coaxially with the capstan shaft 102, and a reel shaft (not shown) is provided for rotation of the capstan gear via an idler gear (not shown). Reel gear (not shown)
To rotate. Since the hub of the cassette tape fits on the reel shaft, the tape is wound by rotating the reel shaft with the rotation of the reel gear.

[0004] In other words, the winding of the tape (at the time of reproduction, recording, etc.) is performed by rotating the flywheel 101 by driving the motor 104, so that the capstan shaft 1 is rotated.
02 and a pinch roller, and the tape is sent out and wound up by a capstan gear, an idler gear, a reel gear, and a reel shaft.

[0005] The motor 104 is fixed to the base plate member 106 via a motor mounting rubber 105 in order to absorb vibration of the motor 104 and prevent resonance. The motor mounting rubber 105 is simply fixed to the motor 104 with an adhesive or the like. Then, peeling may occur due to an external impact or motor vibration, or the motor mounting rubber 10 may be removed during assembly.
Conventionally, the motor mounting rubber 105 is fixed to the motor 104 by a motor mounting screw 107 because there is a problem in replacement of the motor mounting rubber 105 due to a failure in the mounting operation of the motor 5 or the like.

[0006] A printed board 108 constituting an electric circuit for driving and controlling the apparatus is mounted on the tape recorder.
6 is provided via a screw or the like (not shown).

[0007]

However, the conventional motor mounting rubber 107 using the motor mounting screw 107 is not limited.
When the motor mounting rubber 05 is fixed to the motor 104, the screw head of the motor mounting screw 107 has the motor mounting rubber 105 protruding from the tip surface of the motor mounting rubber 105 (the surface opposite to the contact surface with the motor 104). It is necessary to provide a space corresponding to the height of the screw head of the screw 107, and since the motor mounting screw 107 is made of a metal member, a space for preventing electrical contact with the printed circuit board 108 is required. However, there is a problem that the demands for thin and small size required for electronic devices cannot be satisfied.

The present invention has been made in view of the above circumstances, and has as its object to provide an electronic device capable of absorbing motor vibration and fixing the motor in a space-saving manner.

[0009]

According to the present invention, there is provided an electronic apparatus comprising: a motor for driving a driving means; a base plate member to which the motor is attached via a vibration isolating rubber; In an electronic device including a fixing member for fixing, the vibration-proof rubber, in a state where the fixing to the motor by the fixing member is completed, the fixing member without projecting the tip of the fixing member. It has a storage space located inside.

In the electronic device according to the present invention, in a state in which the rubber member for vibration damping has been fixed to the motor by the fixing member, the rubber member can be fixed without the tip of the fixing member projecting into the storage space. By arranging the members, it is possible to absorb the motor vibration and to fix the motor in a small space.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 relate to an embodiment of the present invention. FIG. 1 is a block diagram showing a configuration of a tape recorder, and FIG. 2 is a block diagram showing a configuration of a drive unit of the tape recorder of FIG. 3 is a sectional view showing a section taken along line AA of FIG. 2, and FIG. 4 is an enlarged sectional view showing a section of a main part of FIG.

As shown in FIG. 1, a tape recorder 1 which is an electronic apparatus according to the present embodiment is mounted on a reel shaft 3 provided in a tape storage section 2 so that a cassette hub of a cassette tape is fitted. The recorded information can be reproduced and recorded on the inserted cassette tape, and the tape can be fast-forwarded and rewound. The tape recorder 1 is provided with various switches such as a recording SW 4, a reproduction SW 5 and a stop SW 6 for instructing a recording operation, a reproduction operation and an operation stop, and further includes a microphone 7 for inputting a sound during recording. Speaker 8 for generating sound during playback
And a volume knob 9 for adjusting the sound volume and a tape counter 10 for indicating the running state of the tape.

As shown in FIG. 2, the capstan shaft 18
Is a center shaft of a flywheel 13 rotatably connected to a rotation shaft of the motor 11 via a belt 12 and is mounted on the motor 11 by motor mounting screws 14. The motor 11 is coupled to the base plate member 16 by elastically fitting the base plate member 16 to the rubber 15.

As shown in FIG. 3, various switches for a recording SW4, a reproduction SW5, a stop SW6, and the like are provided on the distal end surface (the surface opposite to the contact surface with the motor 11) of the motor mounting rubber 15. A printed circuit board 17 constituting an electric circuit for driving and controlling the device is mounted. The motor mounting rubber 15 has a substantially cylindrical shape, and the motor mounting rubber 15 is mounted on the motor 11 by screwing the motor mounting screw 14 and the motor 11 at the center thereof.

As shown in FIG. 4, the motor mounting rubber 15 has a screw head 14a of the motor mounting screw 14 when the motor mounting screw 14 is screwed with the motor 11.
Recess 21 for accommodating the screw head 14a in order to prevent the surface of
A groove 22 is formed in the outer periphery of the motor mounting rubber 15 so that the base plate member 16 is elastically fitted. Then, the motor mounting screw 14 is
Screw head 1 of motor mounting screw 14 when screwed with 1
The side surface 4a and the groove 22 are formed so as to be substantially the same height in the height direction of the motor mounting rubber 15.

As a result, the screw head 14a of the motor mounting screw 14 is housed in the concave portion 21, and the distal end surface of the motor mounting rubber 15 excluding the concave portion 21 becomes the closest part to the belt 12 or the printed circuit board 17.

It is needless to say that the dimensions shown in FIG. 4 are merely examples, and it is needless to say that these dimensions are appropriately corrected by the weight of the motor 11 and the like. Then, the screw head 14a of the motor mounting screw 14 is
Are arranged under the above conditions.

As described above, in this embodiment, since the screw head 14a of the motor mounting screw 14 is housed in the recess 21, the dead space due to the screw head 14a of the motor mounting screw 14 is not required and the thickness is reduced. The motor mounting rubber 15 is formed of an insulating member, and the distal end surface of the motor mounting rubber 15 excluding the concave portion 21 is the closest part to the printed circuit board 17. Even if it does, the problem caused by electrical contact can be avoided, so that the space between the motor mounting rubber 15 and the printed board 17 can be minimized, and the thickness can be further reduced.

Further, since the screw head 14a of the motor mounting screw 14 is housed in the recess 21, the screw head 14a
Since the contact between the motor 11 and the belt 12 can be avoided, the degree of freedom in the installation position of the motor 11 can be obtained.

When a motor with a brush is used as the motor, brush noise generated by driving the motor with the brush affects a recording / reproducing head.
This adversely affects the information to be recorded and reproduced, and it is necessary to consider the mounting position of the motor so as to reduce the brush noise. If the belt is located directly above the screw head of the motor mounting screw when it is mounted on the main plate member so that the brush noise generated from the motor is reduced most, conventionally, the belt is According to the present embodiment, the rubber, the screw head, and the gap have to be arranged to be separated from the main plate member by the height dimension of the rubber. Therefore, it is possible to reduce the adverse effect of brush noise while achieving a reduction in thickness.

Further, when the motor mounting screw 14 is screwed with the motor 11, the side surface of the screw head 14a of the motor mounting screw 14 and the groove 22 are substantially flush with each other in the height direction of the motor mounting rubber 15. Since the lateral movement of the main plate member 16 fitted into the groove portion 22 is restricted by the side surface of the screw head 14a of the motor mounting screw 14, the motor 11 is securely coupled to the main plate member 16. be able to.

In this embodiment, a tape recorder has been described as an example of an electronic device. However, the present invention is not limited to this.
The present invention can be applied to an optical disk drive device such as D or MO, a floppy drive device, or an electronic device such as a printer, and similar functions and effects can be obtained.

[0024]

As described above, according to the electronic apparatus of the present invention, the tip of the fixing member protrudes into the storage space in a state where the anti-vibration rubber is completely fixed to the motor by the fixing member. Since the fixing member is positioned without any vibration, there is an effect that the motor vibration can be absorbed and the motor can be fixed in a small space.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of a tape recorder according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a configuration of a drive unit of the tape recorder of FIG.

FIG. 3 is a sectional view showing a section taken along line AA of FIG. 2;

FIG. 4 is an enlarged cross-sectional view showing a cross section of a main part of FIG. 3;

FIG. 5 is a configuration diagram showing a configuration of a drive unit of a conventional tape recorder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tape recorder 2 ... Tape storage part 3 ... Reel axis 4 ... Recording SW 5 ... Reproduction SW 6 ... Stop SW 7 ... Microphone 8 ... Speaker 9 ... Volume knob 10 ... Tape counter 11 ... Motor 12 ... Belt 13 ... Fly wheel 14 ... Motor mounting screw 14a ... Screw head 15 ... Motor mounting rubber 16 ... Base plate member 17 ... Printed circuit board 18 ... Capstan shaft 21 ... Recess 22 ... Groove

Claims (3)

[Claims] 1. An electronic apparatus comprising: a motor for driving a driving unit; a base plate member to which the motor is attached via a vibration isolating rubber; and a fixing member for fixing the vibration isolating rubber to the base plate member. In the device, the anti-vibration rubber has a storage space for positioning the fixing member inside without protruding a tip of the fixing member in a state where the fixing to the motor is completed by the fixing member. And electronic equipment. 2. The fixing member is a screw with a head, the storage space is a space deeper than the height of the head of the screw, and the tip of the head of the screw does not protrude. The screw head is located inside.
An electronic device according to claim 1. 3. The maximum height of the rubber for vibration isolation in a state where the fixing to the motor is completed by the fixing member,
The electronic device according to claim 1, wherein the height of the vibration-proof rubber is less than a maximum height when the rubber is not compressed.