JPS62167656A - Cassette holder opening/closing device - Google Patents

Abstract

PURPOSE:To attain the smooth loading/unloading of a cassette tape and the smooth turning operation of a cassette holder by meshing the gear of a cassette holder with a damper gear and holding the damper gear so that it draws a locus of circular arc around a guide hole and is moved. CONSTITUTION:A cassette holder is held freely turnably by the rotary shaft of the cassette holder 1 and the shaft hole 3a of the front cabinet, the gear 1b of the cassette holder and the damper gear 2 are meshed with each other, the damper gear draws a circular arc locus around the rotary shaft along a guide hole 3b and held movably. Thus, a load force when a cassette tape 10 is removed from a tape driver 5 and a load force by the damper gear are not exerted at the same time and the force of an open spring 4 is reduced, the load force of the damper gear is exerted effectively and the opening speed of the cassette holder is suppressed. Thus, the turning speed is suppressed and the motion slows down, no impulsive force and vibration of the cassette holder take place and the device is operated smoothly and quietly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cassette holder opening/closing device for holding a cassette tape in a magnetic tape recording/reproducing device.

BACKGROUND OF THE INVENTION FIG. 7 shows a conventional opening/closing device for a cassette holder that holds a cassette tape. In Figure 7, 11
12 is a cassette holder that holds the cassette tape; 12 is a damper gear that suppresses the opening speed of the cassette holder; 13 is a damper gear that suppresses the opening speed of the cassette holder;
14 is a front cabinet of a magnetic tape recording/reproducing device, 14 is an opening spring for opening a cassette holder, 15 is a tape drive device, 16 is a cassette pressing spring, 17 is a reel, 18 is a capstan, 19 is a cassette holding lower guide, 2o is a cassette tape.

The cassette holder 11 is rotatably held by a shaft hole 13a integrally formed in the front cabinet 13 and a shaft portion 1.1a provided in the cassette holder 11, and the opening spring 1
Reference numeral 4 designates a torsion spring, which is attached so as to apply a force that opens the cassette holder 11 to the position shown by the two-dot chain line. The damper gear 12 consists of a gear main body 12a and a gear holding part 12b.The gear main body 12a is rotatably held by the gear holding part 12b, and a small gap on this rotating sliding surface is filled with grease and the gear main body 12a is rotatably held by the gear holding part 12b. A resistance force acts against the rotation of 12a.

The damper gear 12 includes a gear body 12a and a cassette holder 1.
1 is attached to the front cabinet 13 by a gear holding part 12b so that the gear body 12a rotates smoothly when the cassette holder 11 rotates around the shaft part 11a. . Cassette pressing spring 16° reel 17. Capstan 18. Each cassette holding lower guide 19 has a tape drive device 15.
These are the parts that make up the.

The operation of the cassette holder opening/closing device configured as above will be described below.

The state in which the cassette tape 2o is attached to the tape drive device 15, that is, the cassette holder 11 is in the front cabinet 1
When the cassette holder 11 is opened from the closed state with respect to the cassette tape 20 by an operation to take out the cassette tape 20, a force is first applied by the opening spring 14 to rotate the cassette holder 11 in the opening direction about the shaft portion 11a. Due to this force, the cassette holder 11 starts to rotate, but the gear body 12b of the Danno Kuichi gear 12, which is meshed with the gear portion 11b of the cassette holder 11, rotates due to the rotational movement of the cassette holder 11, and this damper gear 12 The resistance force against the rotation of the cassette holder 11 acts as a load force for the rotational movement of the cassette holder 11 . This load force causes the cassette holder 110 to rotate slowly.

As the cassette holder 110 rotates, the cassette tape 2o
is pulled out from the tape drive device 15, but since the cassette pressing spring 16 presses the cassette tape 2o toward the cassette holding lower guide 19, a frictional force acts on the contact portion between the cassette pressing spring 16 and the cassette tape 2o. Furthermore, as the cassette holder 11 rotates, the movement trajectory of the cassette tape 2o that is pulled out becomes an arc shape.
Reel 17. The capstan 18 and the cassette holding lower guide 19 come into contact and generate a frictional force. The frictional force generated when the cassette tape 2o is pulled out acts until the cassette tape 2o is removed from the tape drive device 16. On the other hand, the load force applied to the rotational movement of the cassette holder 11 by the damper gear 12 acts from the start of the rotational movement to the end of the rotational movement. Therefore, the force of the start spring 14 to open the cassette holder 11 needs to be greater than the load force that is the sum of the load force due to the frictional force applied to the cassette tape 2o and the load force due to the damper gear 12.

When closing the cassette holder 11, close the cassette holder 1.
1 gear portion 11b is the gear body 12 of the damper gear 12
& is closed by rotating it in the opposite direction to when the cassette holder 11 is opened.

Problems to be Solved by the Invention However, in the above configuration, the cassette holder 11
When the cassette tape 2o is opened, the 7-motion device 15
After the cassette holder 11 comes off, the only load force applied to the rotational movement of the cassette holder 11 is that of the damper gear 12.
The rotational movement is not slow and opens almost instantaneously.
When the rotational movement of the cassette holder 11 stops, an impact force is generated, the cassette holder 11 vibrates, and furthermore, there is a problem in that an impact sound is generated at this time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and aims to smoothly, slowly, and silently attach and detach a cassette tape to and from a tape drive device and rotate a cassette holder.

Means for Solving the Problems In order to solve the above problems, the cassette holder opening/closing device of the present invention has a shaft hole integrally formed in the front cabinet;
A guide hole also formed integrally in the front cabinet,
The cassette holder has a rotating shaft portion and a gear portion and holds a cassette tape, a damper gear suppresses the rotational speed of the cassette holder, and an opening spring opens the cassette holder. A shaft portion is rotatably held in the shaft hole, a gear portion of the cassette holder and a damper gear mesh with each other, and the damper gear is movably held in the guide hole while drawing an arc locus centered on the shaft hole. It is prepared.

According to the above-described structure, the cassette holder is held by the cassette holder and the cassette holder is opened by the opening spring from the state where the cassette tape is attached to the tape drive device.
When the cassette tape is rotated to be pulled out from the tape drive device, the damper gear moves on an arc centered on the rotation axis of the cassette holder through the guide hole, so the rotational resistance force of the damper gear is reduced by the rotational resistance of the cassette holder. The load force is not applied to the rotating operation, but only the frictional force applied to the cassette tape until the cassette tape is removed from the tape drive device. Next, the range of arc movement of the damper gear is set to the position where the cassette holder rotates until the cassette tape is removed from the tape drive device, and
After that, the damper gear is held in the guide hole,
By preventing the damper gear from moving, the rotational resistance force of the damper gear acts as a load force on the subsequent rotational movement of the cassette holder. Therefore, unlike the conventional example, the force for opening the cassette holder of the opening spring does not need to be the sum of the load force due to the frictional force applied to the cassette tape and the load force due to the damper gear, but rather only one of the 2s load force. It is sufficient that the load force is greater than or equal to the larger load force, and the load force from the damper gear acts effectively on the rotational movement of the cassette holder, resulting in slow movement without generating impact force or vibration, allowing smooth and quiet operation. can.

EXAMPLES Below, a cassette holder opening/closing device according to an example of the present invention will be described with reference to the drawings.

Fig. 1 is a side view of the cassette holder opening/closing device according to the embodiment of the present invention, showing a state in which the cassette holder is closed and a cassette tape is attached, and Fig. 2 shows the state in which the damper gear is held in Fig. 1. As shown, the third
The figure shows the A-A cross section in Figure 1, and Figure 4 shows B in Figure 3.
-B is a diagram showing a cross section.

1, 2, 3, and 4, 1 is a cassette holder that holds a cassette tape, 2 is a damper gear, 3 is a front cabinet, 4 is a release spring, 6 is a tape drive device, and 6 is a tape 7 is a reel, 8 is a capstan, 9 is a cassette holding lower guide, and 1o is a cassette tape.

The cassette holder 1 includes a shaft hole 3a integrally formed in the front cabinet 3 and a shaft portion 1a provided in the cassette holder 1.
The opening spring 4 is a torsion spring and is attached to push the cassette holder 1 open. The damper gear 2 consists of a gear main body 2a and a gear holding part 2b. The gear main body 2a is rotatably held by the gear holding part 2b, and a highly viscous material is filled in the small gap between the rotating sliding surfaces of these two parts. It is filled with grease and exerts resistance against the rotation of the gear body 2a. In the damper gear 2, the gear body 2a is connected to the cassette holder 1.
The return regulating part 2d, which is formed integrally with the gear body 2a, is engaged with the return guide hole 1C of the cassette holder 1, and the movement of the gear part 1b, which is integrally formed with the gear holding part 2b, is engaged with the return regulating part 2d, which is integrally formed with the gear main body 2a. The regulating portion 2C is engaged with the guide hole 3b of the front cabinet 1 and is movably held by a washer 21 and a screw 22. The guide hole 3b provided in the front cabinet 3 is a fan-shaped hole centered on the shaft hole 3a, and the return guide hole 1C provided in the cassette holder 1 is an elongated arc-shaped hole centered on the shaft portion 1a. Gear holding part 2
The movement regulating portion 2C provided at b has a prismatic shape so that the gear holding portion 2b itself does not rotate. Gear body 2a
The return regulating portion 2d provided in is a cylindrical convex portion. Press the cassette 6. Reel 7, capstan 8. The cassette holding lower guides 9 are components of the tape drive device 6.

The operation of the cassette holder opening/closing device constructed as described above will be explained below with reference to the first cylinder, FIG. 6, and FIG.

First, FIG. 6 is a diagram showing the cassette holder opening and just before the cassette tape is removed from the tape drive.
FIG. 6 is a diagram showing the cassette holder in a fully opened state.

When the cassette tape 1o is loaded in the tape drive device 5, that is, the cassette holder 1 is closed with respect to the front cabinet 3, when the cassette holder is opened by an operation to take out the cassette tape 1o, the force of the opening spring 4 is first applied. The cassette holder 1 begins to open with the shaft portion 1a as the rotation axis, but at this time, the damper gear 2 meshing with the gear portion 1b of the cassette holder 1 does not rotate due to the resistance force against rotation due to the grease, and the front cabinet 3 along the guide hole 3b.

As the cassette holder 1 rotates, the cassette tape 1° is pulled out from the tape drive device 6.
Capstan 8 and cassette tape 1o, which are the component parts of
At the same time as the contact with the damper gear 2 finally disappears, the movement restriction part 2c reaches one end of the guide hole 3b, and the movement of the damper gear 2 stops. The position at this time is shown in FIG. continue,
When the cassette holder 1 further rotates, the gear body 2a starts to rotate, but since the gear holding part 2b does not rotate as explained in the above configuration, there is a resistance force against the rotation of the gear body 2a. is activated, the rotation of the cassette holder 1 becomes a slow movement, and the rotational movement stops at the position shown in Fig. 6.
The cassette tape 1o can now be removed and inserted.

When closing the cassette holder 1, the damper gear 2 returns along the guide hole 3b to the other end, that is, the position before the cassette holder 1 was opened, and then the cassette holder 1 rotates to close the gear body 2a. Close it by rotating it. In this embodiment, as described above, when the cassette holder 1 is opened, the cassette tape 1o is moved along the guide hole 3b so that the rotational resistance force of the damper gear 2 does not act until it is removed from the tape drive device 6. As this is a necessary condition, cassette holder 1 is closed and
After the damper gear 2 returns to its original position, the return regulating portion 2d of the gear body 2a engages with one end of the return guide hole 1C provided in the cassette holder 1, so that the position of the damper gear 2 is maintained as it is. , then prepare for the operation to open the cassette holder 1.

As described above, according to this embodiment, the front cabinet includes a shaft hole and a guide hole integrally formed, a cassette holder having a rotation shaft portion and a gear portion and holding a cassette tape, a damper gear, and a cassette holder. The cassette holder is rotatably held by the rotating shaft of the cassette holder and the shaft hole of the front cabinet, the gear of the cassette holder and the damper gear engage, and the damper gear is connected to the front cabinet. By holding the cassette tape movably along the guide hole by drawing an arc trajectory centered on the rotation shaft, the load force when the cassette tape is removed from the tape drive device and the load force due to the damper gear are not applied at the same time. Since the force of the opening spring can be reduced, the load force of the damper gear acts effectively, the opening speed of the cassette holder is suppressed, and no impact force or vibration is generated when the rotation stops, allowing the cassette holder to move smoothly and It can be opened quietly.

Effects of the Invention As described above, the present invention rotatably holds a cassette holder having a rotating shaft portion and a gear portion and holding a cassette tape in a shaft hole integrally formed in a front cabinet. A damper gear that suppresses the rotational speed of the cassette holder engages with a gear portion of the cassette holder, and is held in a guide hole formed integrally with the front cabinet so that the damper gear can move along an arcuate trajectory centered on the rotation shaft of the cassette holder. As a result, the load force of the damper gear effectively acts on the rotational movement of the cassette holder when it opens, so the rotational speed is suppressed and the movement becomes slow, with no impact force or vibration of the cassette holder, and the rotational movement is smooth and smooth. It can operate quietly and is extremely effective in improving quality and performance.

[Brief explanation of drawings]

FIG. 1 is a side view of a cassette holder opening/closing device according to an embodiment of the present invention, FIG. 2 is a side view showing the holding state of the damper gear in FIG. 1, and FIG. 3 is a sectional view taken along line AA in FIG. 1.
Figure 4 is a sectional view taken along line B-B in Figure 3, Figure 5 is a side view of the cassette holder just before it opens and the cassette tape is removed from the tape drive, and Figure 6 shows the cassette holder in its fully opened state. FIG. 7 is a side view of a conventional cassette holder opening/closing device. 1... Cassette holder, 1a... Shaft part, 1b... Gear part, 1C... Return guide hole, 2... Damper gear, 2a...
Gear body, 2b...Gear holding part, 2c...
...Movement regulation section, 2d...Return regulation section, 3...
...Front cabinet, 3a...Shaft hole, 3b
...Guide hole, 4...Release spring, 5.
...Tape drive, 1o...Cassette tape. Name of agent: Patent attorney Toshio Nakao and 1 other person7-
17 Jin, Tone/U9- 2- Ta/No (-ki J-1 Ladle Ki 〒Bi↑ft 4-I11 IT 12 7-・Reel δ-・-F Bustan Fig. 3 Fig. 5 Fig. 6 Figure 7

Claims (1)

[Claims] A cassette holder that holds a cassette tape and has a shaft hole integrally formed in the front cabinet, a guide hole also integrally formed in the front cabinet, a rotation shaft part and a gear part, and a rotation of the cassette holder. It consists of a damper gear that suppresses the speed and an opening spring that opens the cassette holder, the rotary shaft portion of the cassette holder is rotatably held in the shaft hole, and the gear portion of the cassette holder and the damper gear mesh with each other, The cassette holder opening/closing device is further characterized in that the damper gear is movably held in the guide hole so as to draw an arc locus centered on the shaft hole.