JPS6350966A - Cassette loader - Google Patents

Abstract

PURPOSE:To smoothly perform the motion by providing to the side wall member the speed reducing means to reduce the moving speed before reaching a 2nd position of a cassette holder by giving the rotation energizing force in reverse direction to the rotary direction of a driving arm at the time when a guide pin moves to a 2nd guide groove part from a 1st guide groove part. CONSTITUTION:When the guide pins 16, 16' of a cassette holder 14 are transferred to the 2nd guide groove part 18b from the 1st guide groove part 18a, the cassette holder 14 is abruptly transferred to the 2nd positional direction by the backlash of the tooth of the driving means consisting of driving arms 19, 19', etc., with the weight of the cassette holder 14 including the cassette not acted during the movement of the 1st guide groove part 18a being added to the 2nd positional direction of the cassette. The big sound caused thereby is prevented by giving the rotation energizing force in the arrow mark (c) direction reverse to the rotary direction of the driving arms 19, 19' by elastic members 30, 30' with control levers 29, 29'. Namely the generation of a big sound is reduced by preventing an abrupt fall with the reduction of the moving speed of the cassette holder 14 prior to its reaching the 2nd position.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a front-loading type cassette mounting device in a cassette type magnetic recording/reproducing device.

BACKGROUND ART Page 3 In recent years, cassette loading devices for cassette tape recording and reproducing devices such as video tape recorders (VTRs) have mainly been of the front-loading type in which the cassette is loaded from the front. An example of the above-mentioned cassette mounting device will be described below with reference to the drawings.

FIG. 6 shows the configuration of a conventional cassette loading device.

In Fig. 6, 1 is a cassette holder for storing cassettes, 2 and 2' are side plates arranged on both sides of the cassette holder 1, and 3 and 3' are side plates) 2 and 2' are L-shaped side plates. A guide groove, usually consisting of two or three guide grooves. Reference numerals 4 and 4' denote side wall members integrally formed on both sides of the cassette holder 1, and guide pins 5 and 5' that engage with guide grooves 3 and 3' provided on the side walls 2 and 2' are guided. They are provided corresponding to the number of grooves. 6, 6' are connected by shaft 7, side play) 2,
Transmission gears 8 and 8' rotatably supported at 2' constitute gears that mesh with transmission gears 6 and 6', respectively, and side plates 2 and 8' respectively. The main guide pins 5, 5 on the side wall members 4, 4' of the cassette holder 1 are inserted into the guide grooves 9, 9' provided at the tips of the drive arms, which are rotatably supported by the shafts of the cassette holder 1.
' are respectively engaged. Reference numeral 1o denotes a drive motor fixed to the side plate 2, which is connected to the motor output shaft by a joint and has a worm shaft 11 supported by the side plate 2, and a worm wheel 12 that meshes with the worm.
The transmission gear 6 is driven through. 13 is a lateral play)
This is the upper plate that connects 2 and 2'.

The operation of the conventional cassette loading device configured as described above will be described below.

When a cassette is inserted into the cassette holder 1 from the front, a switch (not shown) is activated, the drive motor 10 starts rotating, rotates the transmission gear 6 via the worm 11 and the worm wheel 12, and further rotates the transmission gear 6, 6. / to rotate the drive arms 8, 8' which are in mesh with each other.

Therefore, the cassette holder 1, which is integrated with the guide pins 5, 5' that are engaged with the guide grooves 9, 9' provided on the drive arm 8, has an L-shaped guide groove 3, 3 formed on the side. ′
The cassette mounting operation is completed by moving from the horizontal 6 page movement to the vertical movement along the .

Problems to be Solved by the Invention However, as described above, conventional cassette mounting devices are generally equipped with a dedicated and expensive drive motor, and are further equipped with a reduction gear device, etc. in order to maintain an appropriate rotation speed of the drive arm. However, this method has the problem of high cost.

In view of the above-mentioned problems, the present invention is based on the premise that the capstan drive motor of the main body of a magnetic recording/reproducing device is generally used, and eliminates the need for a dedicated drive motor and reduction gear device, thereby achieving an extremely simple and inexpensive structure. A cassette mounting device is provided.

Means for Solving the Problems In order to achieve the above object, the cassette loading device of the present invention comprises:
A cassette holder that can removably hold a cassette;
Guide pins protruding from both side plates of the cassette holder are movably inserted through the cassette holder, and the cassette holder is placed in a first position where cassettes can be attached and removed, and a second position where cassette recording or six-page playback is possible. a first guide groove that guides the first guide groove so as to be able to reciprocate between positions, and a second guide groove formed continuously from one end of the first guide groove in a perpendicular or substantially perpendicular direction; A cassette mounting device comprising a cassette holder driving means having a rotatable driving arm for driving the guide pin to bring the cassette holder from the first position to the second position and vice versa. The device is characterized in that the guide pin extends from the first guide groove to the second guide groove in at least one of the side wall members.
a deceleration means for applying a rotation biasing force in a direction opposite to the rotation direction of the drive arm when the cassette holder moves to the guide groove portion, thereby decelerating the movement speed of the cassette holder before reaching the second position; According to the above-described structure, the present invention reduces the moving speed before the cassette holder moves from the first position where the cassette can be attached or removed to the second position where the cassette can be recorded or played back. This is page 7 of the patent, which is characterized by causing

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 shows the configuration of a cassette loading device according to an embodiment of the present invention. In FIG. 1, reference numeral 14 denotes a cassette holder, 15.15' side walls integrally formed on both sides of the cassette holder 14, 16 and 16' guide pins protruding from the side plates 16 and 15', and 17.1 ″f
1 are side wall members arranged on both sides of the cassette holder 14;
8 and 18' are guides having a first guide groove 182L provided in the side wall members 17 and 17' and a second guide groove 18b continuous from one end of the first guide groove in a perpendicular or substantially perpendicular direction. The guide pins 16 and 16' are respectively engaged with the guide grooves 18 and 18.
' are provided corresponding to the number of '. 19 and 19' are drive arms connected by a shaft 20 and rotatably supported by the side wall members 17 and 17', and have a guide groove 21.2 provided at the tip.
2' side play of the cassette holder 14) 15,
The main guide pins 16, 16' on 15' are engaged, respectively. One of the drive arms 19 or 19' is connected to the shaft 2
0 and the gear 22 are integrally constructed. 23 is a rack with two guide pieces 2 provided on the side wall member 17 or 17'.
4.24' has a rack guide groove formed to be horizontally movable, and has several teeth 25 at one end that mesh with the gear 22, and a drive at the other end bent into an L-shape. It consists of the same number of teeth 26 as the teeth 26 formed in the area that does not mesh with the gear 22 integral with the arm 19 or 19'.

Reference numeral 27 denotes a switch element that is linked to the operation of the rack 23, and is used to detect the beginning and end of the operating stroke of the rack 23, and the switch body is fixed to the side plate 1 or 17'. Reference numeral 28 denotes an output gear provided in the main body of the magnetic recording and reproducing apparatus, and when the cassette mounting capacity according to the present invention is attached to the main body of the magnetic recording and reproducing apparatus, the teeth 26 formed on the rack 23 are adjusted in phase in advance. This is page 9, which is related to this page. Drive arm 19, 19', shaft 20, rack 2
3. The switch element 27 and the holder drive gear 28 constitute a cassette holder drive means.

29.29' is a control lever, which is connected to the side wall member 17 or 17'.
An elastic member 30, 30' such as a spring is rotatably provided in the
are installed coaxially. 31.31' is the side wall member 17
, 17' is a lever stopper of the control lever 29 and 29'. One end of the elastic member 30, 30' is hung on a stopper protruding from the side wall members 17, 17', and the other end is hung on a control lever 29, 29'.

The control levers 29, 29' are constantly biased to rotate in the direction of the lever stopper 31, 31' by the elastic members 30, 30', and the control levers 29, 29' and the elastic members 30, 30' reduce the speed. constitutes a means.

FIGS. 2 to 4 are schematic side views of essential parts for explaining the operation of the cassette mounting device configured as described above. Now, when the holder drive gear 28 rotates and the rack 23 moves in the direction of arrow a, The drive arm 19 rotates in the direction of arrow 10 page b.

FIG. 3 shows a state in which the guide pin 16 protruding from the side plate 16 of the cassette holder 14 is about to change from the first guide groove part 18a of the side wall member 17 to the second guide groove part 18b. At this time, the drive arm 19 and the control lever 29 are about to come into contact with each other.

When the guide pin 16 further moves toward the second guide groove portion 1sb (the second position direction where recording or playback of the cassette is possible), the drive arm 19 and the control lever 29 begin to come into contact with each other.
This state is maintained until the second position of the cassette apparatus state shown in FIG. Here, the control lever 29
0, a rotation urging force is applied in the direction C opposite to the rotation direction of the drive arm 19, so that the cassette holder 1
The movement speed before reaching the second position of No. 4 is reduced.

Normally, when the guide pins 16 and 16' of the cassette holder 14 move from the first guide groove part 18a to the second guide groove part 18b, the cassette holder 14 containing the cassette that has been fully acted upon while moving in the first guide groove part isa. The weight is added in the direction of the second position of the cassette, and the cassette holder 14 is suddenly moved towards the second position of the cassette due to the backflushing of the gears of the driving means consisting of drive arms 19, 19', etc. (It's falling rather than moving) It makes a loud noise, but
According to this embodiment, the control lever 29.29' is given a rotation urging force by the elastic member 30.30' in the direction opposite to the rotation direction of the drive arms 19, 19' (arrow C). Therefore, the moving speed of the cassette holder 14 before reaching the second position is reduced, a sudden drop does not occur, and loud noises are significantly reduced.

Effects of the Invention As described above, according to the present invention, with an extremely simple and inexpensive configuration, the moving speed of the cassette holder before reaching the second position can be reduced, resulting in smooth and quiet operation. Obtainable.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a cassette loading device according to an embodiment of the present invention, FIGS. 2 to 4 are schematic side views of main parts for explaining the operation of the embodiment of the present invention, and FIG. 5 is a conventional cassette loading device. FIG. 2 is a perspective view showing the configuration of a cassette mounting device. 14...Cassette holder, 15.15'...
...Side plate, 16.16'...Guide pin, 17°17'...Side wall member, 18...
...Guide groove, 18a...First guide groove part, 18
b...Second guide groove, 19°19'...
・Drive arm, 29.29'...control lever,
30.3o'...Elastic member.

Claims (2)

[Claims] (1) A cassette holder capable of removably holding a cassette; guide pins protruding from both side plates of the cassette holder are movably inserted; a first guide groove portion that guides the cassette to be moved back and forth between the first position and the second position where the cassette can be recorded or played back;
a side wall member having a second guide groove continuously formed in a direction perpendicular or substantially perpendicular to one end of the guide groove, and the cassette holder is moved from the first position to the second position and in the opposite direction; cassette holder driving means having a rotatable drive arm for driving the guide pin so as to move the guide pin from the first guide groove to the second guide groove on at least one of the side wall members; A deceleration means is provided for applying a rotation urging force in a direction opposite to the rotation direction of the drive arm when the cassette holder moves, thereby decelerating the movement speed of the cassette holder before reaching the second position. A cassette loading device characterized by: (2) The deceleration means includes a control lever rotatably provided on at least one side wall member, and an elastic member that applies rotational force in one direction to the control lever, and the drive arm moves the cassette holder to the first position. Before reaching the end of the rotation to bring it to the second position, a part of the drive arm comes into contact with a part of the control lever, and the control lever is rotated against the rotation biasing force of the elastic member. The cassette loading device according to claim 1, wherein the cassette mounting device is configured to allow the cassette to be loaded.