JPH0319082Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a cassette loading device for transporting and loading cassettes.

[Background technology and its problems]

The cassette loading device inserts the cassette from the front of the recording/playback device during recording or playback, transports and inserts the cassette, and when the cassette is ejected, the cassette pops out to a predetermined position using the storage spring of the spring force storage mechanism. be.

FIG. 1 is a side view schematically showing such a cassette loading device, and FIG. 2 is a plan view of the drive system shown in FIG. a support plate provided with an L-shaped hole 4 for guiding; 5 an arm provided with a long hole 6 into which the pin 2 is loosely fitted; and 7 an arm that rotates as the pin 2 moves; This is a spring whose end is fixed to the transmission gear 8 and presses and fixes the inserted cassette C. The arm 5 and the transmission gear 8 rotate at the same time via a spring 7, and the transmission gear 8 has teeth carved in specific parts and protrusions 9 formed in parts without teeth.

10 is an intermediate gear that meshes with the transmission gear 8;
(hereinafter simply referred to as gear 10), 11 is the gear 1
0, and the other end is a storage spring fixed to the drive gear 12, which serves as a worm wheel. Note that the gear 10, drive gear 12, and storage spring 11 constitute a spring force storage mechanism.

A worm gear 13 meshes with the drive gear 12 and is driven by a motor 14. 15,1
Reference numeral 6 denotes a switch for starting or stopping the motor 14. The switch 15 is arranged to be operated by the arm 5, and the switch 16 is operated by the projection 9.

Next, the operation of the above-mentioned cassette loading device will be explained with reference to FIGS. 1 and 2.

Insert cassette C into cassette holder 1 from the left in Fig. 1 to the position shown by the two-dot chain line, and then
When you push in further, pin 2 of cassette holder 1
moves to the right along the hole 4 of the support plate 3, so
The arm 5 engaged with the pin 2 and the transmission gear 8 coupled to the arm 5 via the spring 7 simultaneously rotate clockwise, and the gear 10 rotates counterclockwise. At this time, since the motor 14 has not yet started, the drive gear 12 and the worm gear 13 do not rotate. Therefore, the storage spring 11 provided between the gear 10 and the drive gear 12 rotates, and rotational force (force for making the cassette C fly out when ejecting it) is stored in the storage spring 11.

Then, when the cassette C is pushed to the right by a predetermined stroke, the arm 5 operates the switch 15 to start the motor 14, the worm gear 13 rotates, and the drive gear 12 is rotated counterclockwise.
After the drive gear 12 rotates counterclockwise to release the rotational force accumulated in the storage spring 11, the gear 10 is further rotated counterclockwise via the storage spring 11, and the transmission gear 8 and arm 5 are rotated counterclockwise. Since the pin 2 is rotated clockwise through the pin 2, the pin 2 moves along the hole 4, and the cassette C is conveyed and inserted. Since the motor 14 is still rotating even when the cassette C is inserted, the drive gear 12, the gear 10, and the transmission gear 8 are rotated by the worm gear 13 as described above, but the arm 5 is not rotated. Therefore, a biasing force is accumulated in the spring 7 to press and fix the pin 2, that is, the cassette holder 1, and when the protrusion 9 of the transmission gear 8 operates the switch 16, the motor 1
4 stops. In this state, cassette loading is completed, and thereafter tape loading and the like are performed and the recording or reproducing operation begins.

When an eject operation is performed to eject cassette C, the motor 14 rotates in the opposite direction to that during cassette loading, and each part operates in the opposite direction to that during cassette loading, and cassette C is ejected.

In the cassette loading device that operates as described above, after the cassette C is inserted into the cassette holder 1 and pressed, the cassette C is held for a while until the switch 15 is operated and the rotational force accumulated in the accumulation spring 11 is released. If it is not pressed, the cassette C will fly out due to the rotational force accumulated in the storage spring 11. Further, when the motor 14 is rotated at a high speed to prevent the cassette C from flying out, the cassette loading operation is improved, causing problems such as strain on various parts.

[Purpose of invention]

This idea was made in consideration of the above points, and it allows for a quick transition from insertion of a cassette to the transport operation, prevents the cassette from flying out when it is inserted, and facilitates the operation of ejecting the cassette. The present invention provides a cassette loading device as described above.

[Summary of the idea]

In order to achieve the above object, this invention forms a drive gear train with a spring force accumulation mechanism between the cassette moving arm and the worm gear, and further provides a gear with missing teeth to accumulate the accumulation spring. Forms an accumulated force retention mechanism that retains force,
This system is designed to allow a quick transition to the transport operation after the cassette is inserted, thereby preventing the cassette from popping out when the cassette is inserted, and at the same time maintaining the cassette ejecting force.

〔Example〕

FIG. 3 is a side view schematically showing an embodiment of this invention, and FIG. 4 is a plan view of the drive system shown in FIG. In the state shown in FIG. 3 when the cassette C is not inserted, the notch 18 faces the gear 10. A worm wheel 19 meshes with the drive gear 12 and the worm gear 13, and rotates together with the partially toothed gear 17. Therefore, the partially toothed gear 17 and the worm wheel 19 may be formed integrally. The partially toothed gear 17, the notch 18, and the worm wheel 19 constitute an accumulated force holding mechanism, and other symbols indicate the same parts as in FIGS. 1 and 2.

Next, the operation of the cassette loading device of this invention will be explained with reference to FIGS. 3 and 4.

Insert cassette C into cassette holder 1 from the left in Fig. 3 to the position shown by the two-dot chain line, and then
Push the button to the right a specified stroke and turn the switch 15.
Since the gear 10 and the notch 18 of the partially toothed gear 17 are opposed to each other until the gear 10 is operated, the gear 10 operates in the same manner as the conventional example.

When the switch 15 is actuated by the arm 5, the teeth of the partially toothed gear 17 and the gear 10 are located close to each other at the time the switch 15 is actuated, so the worm gear 13 is actuated by the motor 14. When rotated, the partially toothed gear 17 and the gear 10 immediately mesh with each other, and the worm wheel 19 and drive gear 12 simultaneously rotate in the direction of the arrow in FIG. 3. Therefore, the spring force storage mechanism rotates while the storage spring 11 continues to store rotational force. Thereafter, the protrusion 9 of the transmission gear 8 operates the switch 16 and the motor 14 is stopped, as in the conventional example. At this time, the partially toothed gear 17 rotates to the position shown by the two-dot chain line in FIG. 3, that is, the position where the notch 18 and the gear 10 do not face each other, and then stops, thereby entering the cassette insertion state.

When the eject operation is performed to eject the cassette C, the motor 14 rotates in the opposite direction to that during cassette loading, and the cassette is shifted from the inserted state to the partially toothed gear 1.
7. The worm wheel 19 rotates counterclockwise, and the gear 10 and drive gear 12 rotate clockwise. Then, when the gear 10 and the partially toothed gear 17 do not mesh, that is, when the gear 10 and the notch 18 face each other, the gear 10 further rotates clockwise due to the rotational force stored in the storage spring 11, and the cassette C is ejected into a predetermined position.

As explained above, in the cassette loading device of this invention, when the cassette C is inserted into the cassette holder 1 and the cassette C is pressed for a predetermined stroke and the switch 15 is activated, the spring force is accumulated while the rotational force is accumulated. Since the mechanism rotates immediately,
Even if you release your hand from cassette C, cassette C will not fly out.

It should be noted that the configuration of the accumulated force holding mechanism in the above embodiment is merely an example, and any mechanism that functions in the same manner may be used.

[Effect of idea]

As explained above, the cassette loading device of this invention forms a gear train with a spring force accumulation mechanism between the cassette moving arm and the worm gear, and further provides an accumulation force retention mechanism with a partially toothed gear. Therefore, the spring force accumulating mechanism rotates while accumulating rotational force almost simultaneously with the rotation of the worm gear, which has the advantage of preventing the cassette from popping out when the cassette is inserted. Further, since the ejecting force that causes the cassette to fly out is maintained by the accumulated force holding mechanism, there is an advantage that the ejecting operation of the cassette is facilitated.

[Brief explanation of the drawing]

Fig. 1 is a side view schematically showing a conventional cassette loading device, Fig. 2 is a plan view of the drive system shown in Fig. 1, Fig. 3 is a side view schematically showing an embodiment of this invention, and Fig. 4 The figure is a plan view of the drive system of FIG. 3. In the figure, 1 is a cassette holder, 3 is a support plate, 5 is an arm, 7 is a spring, 8 is a transmission gear, 10 is an intermediate gear, 11 is a storage spring, 12 is a drive gear, 13 is a worm gear, 14 is a motor, 17 18 is a notch, 19 is a worm wheel, and C is a cassette.

Claims (1)

[Scope of utility model registration request] A worm wheel is rotated by a worm gear, a drive gear is rotated by meshing with the worm wheel, and a driving force is transmitted by meshing with an intermediate gear connected to the drive gear via a storage spring. A driving gear train having a spring force accumulation mechanism including a transmission gear and an arm coupled to the transmission gear via a spring and which rotates when a cassette is inserted, rotates integrally with the worm wheel. A partially toothed gear whose gear portion selectively meshes with the intermediate gear is provided, and the partially toothed portion of the partially toothed gear faces the intermediate gear before the cassette is inserted. After the cassette ejecting force is accumulated in the storage spring by the rotation of the drive gear train that rotates when the cassette is inserted, the gear portion of the partially toothed gear meshes with the intermediate gear. A cassette loading device characterized in that the cassette ejection force accumulated in the spring force accumulation mechanism is maintained by being driven by the spring force accumulation mechanism.