JPS6113307B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a record player, which automatically changes the status of records with different recording formats by mounting (and/or removing) a jacket having a different shape corresponding to the difference between the records. The purpose of this invention is to provide a record player that is devised so that it can be switched easily.

Records on which high-frequency information is densely recorded, such as video discs, must be carefully inserted into and removed from the player. In order to reduce this need for attention, it has been proposed that this attachment and detachment is done by attaching and detaching the jacket. That is, by inserting and removing a jacket containing a record into the player, the record can be left in the player, and then, after the play operation is completed, an empty jacket is inserted into and removed from the player. A device is known that allows records stored in a player to be retrieved. However, this known device can only be applied to records having one specific recording format.

Records have different playback times depending on the information recorded therein, but classifying them into multiple types is advantageous in terms of increasing the commercial value of records. Therefore, when classifying records, there are two possible methods: changing the record diameter in the same way as for ordinary audio records, or keeping the main format the same and only changing the recording pitch. This is undesirable because it complicates the operation of loading and unloading records. On the other hand, the latter method has the disadvantage that it is necessary to identify the difference in recording format and change the transfer status of the pickup transfer system.

In order to eliminate this trouble, the present invention detects the difference in shape of the jacket, which has a difference in shape depending on the recording format of the record to be stored, and automatically changes the state of the pick-up transfer system accordingly. The aim is to provide a record player that can.

Next, embodiments of the present invention will be described based on the drawings.
FIG. 1 shows an outline of a jacket applicable to the record player of the present invention. This jacket J has two mouth-shaped frames 1, 2
and upper and lower plates 3, 4 which are joined to the upper and lower surfaces of each of these frames. The frame bodies 1 and 2 of the two plates are joined so that they can be separated at a portion of each of the opposing surfaces and the two adjacent surfaces (at the hatched portion shown in the figure), and this separated portion is expanded in a direction away from each other together with the upper and lower surface plates to form a record entrance/exit 5 through which records can be taken in and out, and this expansion can be released. That is, each of the frame bodies is made of relatively hard flexible synthetic resin, while each of the upper and lower face plates is made of relatively soft flexible synthetic resin to enable the above-mentioned expansion control. The left and right outer surfaces of this jacket are provided with guide grooves 6 which extend in the record mounting/removal direction and whose front ends reach the separating section,
This guide groove allows a rail (not shown) provided inside the player to move forward and backward, thereby making it possible to open and close the jacket according to the movement when the jacket is inserted into or removed from the player. ing. This jacket may be provided with magnetic or mechanical engagement means between the upper and lower frames constituting the record opening 5, but this is not shown.

In order to properly operate the player of the present invention,
It is necessary to provide this jacket J with a shape difference to identify the difference in recording format of the records stored therein, but in the jacket of this embodiment, this shape difference is provided at the record entrance/exit of the frame. This is determined based on the positional difference between the notches 7 and 8 provided in the cutout 5. In other words, there are two records, one for 30 minutes playback and one for 1 hour playback.
If it is a different type (that is, the pitch of the former is twice that of the latter), the distance from the center 9 of the jacket may be set to be P for the former and Q for the latter. For a record having signal surfaces on both sides, cutouts 7 with the same purpose may be provided at symmetrical positions as shown in the figure, and these may be utilized.

An embodiment of a player that uses this jacket to automatically change its operating state will be described below. Figures 2 and 3 show the player in different operating states, the former with a jacket JA containing a 30-minute record, and the latter with a jacket JB containing a 1-hour record. There is.

A worm 11 is attached to a drive shaft 10 that rotates the record. This worm is bearing 1
The worm wheel 15 is engaged with a worm wheel 15 which is loosely fitted onto a rotating shaft 14 which is supported by 2 and 13. The worm wheel has a shaft casing 16, which is provided with slots 17. The slider 18 is mounted so as to be movable on the rotating shaft 14 in its axial direction.
A pawl 19 provided at the end can move within the slotted groove 17 in accordance with the movement, and always transmits the rotation of the worm wheel to the slider. This slider has a gear 20 at the other end.
It is also provided with a serrated portion 21 forming a clutch on its side surface, and a set of flange portions 22 on its outer periphery that allow entry of a pin provided on a connecting lever, which will be described later.
It is equipped with 23. The rotating shaft 14 has a gear 24
A block 25 with a block 25 is fixed. The side surface of this block is provided with serrations 26 which together with the serrations 21 constitute a clutch. The crown gear 27 has an outer gear 28 with which the gear 20 can be engaged and disengaged, and an inner gear 29 that is always engaged with the gear 24. When the crown gear is inserted, the crown gear 27 is connected to the worm wheel 15. rotation
The speed is reduced to 1/2 and transmitted to the rotating shaft 14. A worm 32 is attached to the rotating shaft 14 and can be attached to and detached from a worm wheel 31 constituting the pick-up transfer system 30. This attachment/detachment is controlled by a controller 33 provided with the bearing 13 that supports the rotating shaft.
This control is operated only when driving the pick-up transfer system 30 to achieve engagement between the worm and the worm wheel as shown.

The rotating plate 34 has pins 35, 36, 3 on its surface.
7 and 38, and are mounted so as to be rotatable around a support shaft 39. The pin 35 allows the entry of the notch 7 provided in the jacket JA, but is in such a way that it abuts the front end 40 of the jacket JB.
On the other hand, the pin 36 allows the notch 8 provided in the jacket JB to enter, but the front end 4 of the jacket JA
They are arranged so as to collide with 1. The pin 37 is engaged with a through hole 44 provided at one end of a rotary lever 43 supported by a support shaft 42, so that the rotary lever is oscillated in accordance with the rotation of the rotary plate 34. ing. A pin 45 provided at the other end of this rotating lever is engaged in a groove between a pair of flanges provided on the slider 18, and is configured to convert rotation by this rotating lever into sliding motion of the slider. I have to. A tension spring 46 is stretched between the remaining pin 38 and the support shaft 42 of the rotating lever.

When the jacket JA is glued in the above player, the pin 3 of the rotary plate 34 is attached as shown in Fig. 2.
5 enters the notch 7 of the jacket, while the pin 36
abuts the front end 41 of the jacket. The pivoting lever 43 is placed in the position shown, the gear 20 of the slider 18 is released from the outer gear 28 of the crown gear 27, and the serrations 21 between the opposing surfaces of the slider 18 and the block 25, 26 is engaged. Therefore, the rotation of the drive shaft 10 is caused by the worm 11, the worm wheel 15, the slider 18,
It is transmitted to the pick-up transfer system 30 via the rotating shaft 14 and the worm 32. This is because the power transmission system does not include the crown gear 27 with a reduction ratio of 1/2, so the feed speed of the pick-up transfer system is twice that of a case where the crown gear 27 is provided.

Next, when a one-hour playback jacket JB is attached to a player set in this mode, its front end 40 pushes up the pin 35 against the spring 46 and rotates the rotary plate 34 counterclockwise. . At this time, the pin 36 enters the notch 8 of the jacket JB, allowing the rotation. Based on this rotation, the rotary lever 43 swings clockwise and reverses the rotation, as shown in FIG.
Move it to the left along. Due to this movement, the gear 20 engages with the outer peripheral gear 28 of the crown gear 27, and the serrations 21 and 26 provided between the opposing surfaces of the slider 18 and the block 25 are disengaged.
Therefore, the drive shaft 10 rotates through the crown gear 27, that is, the worm 11, the worm wheel 15, the slider 18, and the crown gear 2.
7, the rotating shaft 14, and the worm 32 to the pick-up transfer system 30.

Thereafter, when the jacket JA for 30-minute playback is attached again, the slider 18 is returned to the state shown in FIG. 2, and the transfer speed of the pick-up transfer system 30 can be controlled in accordance with this attachment operation.

The present invention can be modified in various ways apart from the above embodiments. For example, the pick-up transfer system is driven by a motor separate from the motor used to drive the record, and the rotation of this motor is controlled by the shape of the jacket (not limited to the above-mentioned switches, which can be switched mechanically, magnetically, or optically). Alternatively, the plunger that controls the slider may be driven and controlled based on the switch output. Furthermore, since the above-mentioned changes can be made by rotating one rotating body for any record, the construction is simple and the notch in the jacket can be made within a relatively small area. can be provided.

As described above, the present invention detects the identification of records with different recording formats based on the difference in shape of the jackets containing the records, and changes the state of the pick-up transfer system to match the recording format based on the detection output. This eliminates the trouble of identifying the jacket each time it is attached to the player and manually switching the operating state of the player, thereby improving the usability of the player.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a jacket applicable to the player of the present invention, and FIGS. 2 and 3 are plan views of the main parts of the embodiment of the present invention in different operating states. FIG. 4 is a sectional view taken along line AA' in FIG. JA, JB...jacket, 7, 8, 35, 36
...Notch, pin (shape difference detection means), 43,1
8, 27... Rotating lever, slider, crown gear (changing means), 30... Pick-up transfer system.

Claims (1)

[Claims] 1. Means for detecting the identification of records with different recording formats based on differences in the shape of jackets containing the records; and means for changing the state of the pick-up transfer system to match the recording format based on the output of the detection means. In the record player, the difference in shape is a difference in the position of a notch formed in the jacket, and the detecting means includes a rotating body, at least two pins provided at different positions on the rotating body, means provided on the rotating body to drive the changing means when the rotating body rotates, and the notches at different positions correspond to different pins, thereby causing the rotating body to adjust to the shape difference. A record player that can rotate in different directions depending on the situation.