JP2537974B2 - Cassette loading device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front loading type cassette mounting device in a cassette type magnetic recording / reproducing device.

2. Description of the Related Art In recent years, a cassette loading device of a cassette tape recording / reproducing device such as a video tape recorder (VTR) is mainly a front loading type in which a cassette is loaded from the front side. An example of the above cassette mounting device will be described below with reference to the drawings.

FIG. 5 shows the structure of a conventional cassette mounting device.

In FIG. 5, 1 is a cassette holder for accommodating cassettes, 2 and 2'are side plates arranged on both sides of the cassette holder 1, and 3 and 3'are L-shaped guides provided on the side plates 2 and 2 '. Grooves, usually composed of two or three each. 4,4 'are side wall members integrally formed on both sides of the cassette holder 1, and are side plates 2,2', respectively.
Guide pins 5 and 5'that engage with the guide grooves 3 and 3'provided in the are provided corresponding to the number of the guide grooves. 6,6 'are transmission gears connected by a shaft 7 and rotatably supported on the side plates 2,2', and 8,8'constitute gears meshing with the transmission gears 6,6 ', respectively. Main guide pins 5 and 5'on the side wall members 4 and 4'of the cassette holder 1 are guided in guide grooves 9 and 9'provided at their tips by pivotable drive arms axially supported by the plates 2 and 2 ', respectively. Are engaged with each other. Reference numeral 10 denotes a drive motor fixed to the side plate 2, a worm shaft 11 connected to the motor output shaft by a joint and supported by the side plate 2, and a worm wheel 12 that meshes with the worm 12.
The transmission gear 6 is driven via. 13 is the side plate 2,
It is a top plate that connects 2 '.

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

When the cassette is inserted into the cassette holder 1 from the front side, a switch (not shown) is activated, the drive motor 10 starts rotating, and the transmission gear 6 is rotated via the worm 11 and the worm wheel 12, and further the transmission gears 6, 6 The drive arms 8 and 8'which are respectively meshed with 'are rotated. Therefore, the cassette holder 1 integrated with the guide pins 5 and 5'engaged with the guide grooves 9 and 9'provided in the drive arms 8 and 8'has a side plate 2,
The movement from the horizontal movement to the vertical movement is performed along the L-shaped guide grooves 3, 3'of 2 ', and the cassette mounting operation is completed.

However, as described above, the conventional cassette mounting device is generally equipped with a dedicated expensive drive motor, and is further equipped with a reduction gear device or the like in order to achieve an appropriate rotation speed of the drive arm. However, there was a problem that the cost was high.

In view of the above problems, the present invention eliminates a dedicated drive motor, a reduction gear device, and the like on the premise that a capstan drive motor or the like of a magnetic recording / reproducing apparatus body is generally used, and an inexpensive cassette with an extremely simple configuration. A mounting device is provided.

Means for Solving the Problems In order to achieve the above object, a cassette mounting device of the present invention is a cassette holder capable of detachably holding a cassette, and guide pins protruding from both side plates of the cassette holder are movable. An L-shaped guide groove portion that is inserted into the cartridge and guides the cassette holder so as to reciprocate between a first position where the cassette can be attached and detached and a second position where the cassette can be recorded or reproduced. A first guide groove portion that allows the cassette holder to move horizontally in the L-shaped guide groove portion, and a second guide groove portion that is formed continuously from one end of the first guide groove portion in a right angle or substantially right angle direction. The guide pin so as to bring the both side wall members and the cassette holder, which have been opened, in the direction from the first position to the second position and in the opposite direction. And a cassette holder drive means having a rotatable drive arm for rotating the drive arm when the guide pin moves from the first guide groove portion to the second guide groove portion on at least one of the both side wall members. A rotational urging force in a direction opposite to the direction is applied to the second portion of the cassette holder.
A single elastic member that reduces the moving speed before reaching the position, and a position that positions the elastic member so that the rotational biasing force of the elastic member does not act on the drive arm when the cassette holder moves in the first guide groove portion. The restricting stopper and the elastic member are integrally provided with a bent portion at one end on the side in contact with the drive arm, and the drive arm has a rotation end on the side where the cassette holder is brought to the second position. Before a part of the drive arm comes into contact with the elastic member and the position regulation by the stopper is released to displace against the rotational biasing force of the elastic member, the elastic member causes the drive arm to move. A guide member is integrally formed with the drive arm so as not to separate from the drive arm.

Effect The present invention has an extremely simple and inexpensive structure with the above-described configuration, and the moving speed of the cassette holder before it reaches the second position can be reduced by a single elastic member.
The operation is smooth and quiet, and the bending portion is provided at one end of the elastic member that is in contact with the drive arm, so that when the drive arm partially contacts the elastic member, the end surface of the elastic member is Since it does not come into contact with the drive arm, either the drive arm or the elastic member is not damaged, and the guide member is formed on the drive arm, so that the elastic member is separated from the drive arm. There is nothing to do.

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

FIG. 1 shows the structure of a cassette mounting apparatus according to an embodiment of the present invention. In FIG. 1, 14 is a cassette holder, 15 and 15 'are side walls integrally formed on both sides of the cassette holder 14, 16 and 16' are guide pins protruding from the side plates 15 and 15 ', and 17 and 17 ′ Is a side wall member arranged on both sides of the cassette holder 14, and 18 and 18 ′ are first guide groove portions 18 a provided in the side wall members 17 and 17 ′, and are continuous from one end of the first guide groove portion at a right angle or a substantially right angle direction. The second formed
Two or three guide grooves are provided each having a guide groove portion 18b, and guide pins 16 and 16 'are engaged with each other. The guide pins 16 and 16 'are provided corresponding to the number of the guide grooves 18 and 18'. 19, 19 'are drive arms rotatably supported by the side wall portions 17 and 17', which are connected by a shaft 20, and guide grooves 21 and 22 'provided at the tips thereof are provided with side plates 15 and 15 of the cassette holder 14. The main guide pins 16, 16 'on the' are respectively engaged. One of the drive arms 19 or 19 'is integrally formed with a gear 22 concentric with the shaft 20. A rack 23 has a rack guide groove formed so as to be horizontally movable by being fitted to two guide pieces 24, 24 'provided on the side wall member 17 or 17', and has one end meshed with the gear 22. Some teeth 25
And the teeth 26 of the same number as the teeth 25 formed in a region which does not mesh with the gear 22 integral with the drive arm 19 or 19 'at the other end bent in an L shape.

Reference numeral 27 is a switch element which is interlocked with the operation of the rack 23, and which detects the beginning and end of the operation stroke of the rack 23, and the switch body is fixed to the side plate 17 or 17 '. 28
(See FIG. 2) is an output gear provided in the main body of the magnetic recording / reproducing apparatus. When the cassette mounting apparatus according to the present invention is attached to the main body of the magnetic recording / reproducing apparatus, the output gear is arranged in the rack 23 in a phase-matched state. The teeth 26 are engaged with each other. The drive arms 19, 19 ', the shaft 20, the rack 23, the switch element 27 and the holder drive gear 28 constitute cassette holder drive means.

29, 29 'are elastic members provided on the shaft portions 30, 30' projecting from the side wall member 17 or 17 '. 31,31 'are side wall members
It is a first stopper at one end of elastic members 29, 29 'projecting from 17, 17'. The other end of the elastic member 29, 29 'is a side wall member 17, 1
It is hooked on the second stopper that is projected on 7 '. The elastic members 29, 29 'are constantly given a rotational biasing force in the direction of the first stoppers 31, 31'.

29a and 29a ′ are bent portions continuously provided on the elastic members 29 and 29 ′, and end faces of the elastic members 29 and 29 ′ are the drive arms 19 and 29a ′.
It is provided so as not to contact with. By providing the bent portions 29a and 29a ′, a part of the drive arms 19 and 19 ′ are elastic members 2.
When abutting against 9,29 ', the end faces of the elastic members 29,29' no longer come into contact with the drive arms 19,19 ', so that the drive arms 19,29'
Either 19 'or the elastic members 29, 29' is not damaged.

Reference numerals 19a and 19a 'are guide members integrally provided on the drive arms 19 and 19'.

2 to 4 are side views of the main parts for explaining the operation of the cassette mounting apparatus 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 b.

In FIG. 3, the guide pin 16 projecting from the side plate 15 of the cassette holder 14 has the first guide groove portion 18 a of the side wall member 17.
The state is about to change from the second guide groove portion 18b. At this time, the drive arm 19 and the elastic member 29 are about to come into contact with each other. When the guide pin 16 further moves in the direction of the second guide groove 18b (the second position direction in which recording or reproduction of the cassette is possible), the drive arm 19 and the elastic member 29 start to contact each other, and the fourth
The state is maintained up to the second position of the mounted state of the cassette in the figure. Here, since the elastic member 29 is given a rotational biasing force in the direction c opposite to the rotational direction of the drive arm 19, the moving speed of the cassette holder 14 before it reaches the second position is reduced. .

Due to the action of the guide portion 19a of the drive arm 19, the elastic member 29 does not disengage from the drive arm 19 and can reliably apply the rotational biasing force in the c direction.

Usually, the guide pins 16, 16 'of the cassette holder 14 are the first
When the guide groove portion 18a is moved to the second guide groove portion 18b, the weight of the cassette holder 14 including the cassette that did not act on the first guide groove portion 18a during movement is taken into consideration in the second position direction of the cassette, and the drive arm 19 is added. By the backflush of the gears of the driving means composed of, 19 'and the like, the cassette holder 14 suddenly moved toward the second position of the cassette (it was dropped rather than moved), and a loud noise was generated. According to the present embodiment, the elastic members 29, 29 'apply a rotational biasing force in the direction (arrow c) opposite to the rotational direction of the drive arms 19, 19', so that the cassette holder 14 The moving speed before reaching the 2 position is reduced, a sudden drop does not occur, and a loud sound is significantly reduced.

As described above, according to the present invention, the structure is extremely simple and inexpensive, and the moving speed of the cassette holder before reaching the second position can be reduced by a single elastic member, and the operation is smooth and quiet. In addition, since the bending portion is provided at one end of the elastic member on the side contacting the drive arm, the end surface of the elastic member contacts the drive arm when a part of the drive arm contacts the elastic member. Since the drive arm and the elastic member are not damaged, the guide member is formed on the drive arm, so that the elastic member does not separate from the drive arm. Can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a cassette mounting device according to an embodiment of the present invention, and FIGS. 2, 3, and 4 are side views of essential parts for explaining the operation of the embodiment of the present invention. FIG. 1 is a perspective view showing the structure of a conventional cassette mounting device. 14 …… Cassette holder, 15,15 ′ …… Side plate, 1
6,16 '... Guide pin, 17,17' ... Side wall member, 18 ... Guide groove, 18a ... First guide groove portion, 18b ... Second guide groove portion, 1
9,19 ′ …… Drive arm, 19a, 19a ′ …… Guide member, 29,
29 '... Elastic member.

Claims (1)

(57) [Claims] 1. A cassette holder capable of detachably holding a cassette and guide pins projecting from both side plates of the cassette holder are movably inserted, and the cassette holder can be detached from the cassette holder. L-shaped guide groove portion for guiding reciprocating movement between the first position and the second position where the cassette can be recorded or reproduced.
The L-shaped guide groove portion includes a first guide groove portion that allows the cassette holder to move horizontally, and a second guide groove portion that is formed continuously from one end of the first guide groove portion at a right angle or a substantially right angle direction. Cassette holder drive means having both side wall members and a rotatable drive arm for driving the guide pin so as to bring the cassette holder from the first position to the second position and in the opposite direction. A rotary biasing force is applied to at least one of the both side wall members in a direction opposite to the rotation direction of the drive arm when the guide pin moves from the first guide groove portion to the second guide groove portion. A single elastic member that reduces the moving speed of the cassette holder before reaching the second position, and the elastic member when the cassette holder moves in the first guide groove portion. A stopper that regulates the position of the elastic member so that the rotational biasing force of the member does not act on the drive arm, and the elastic member is integrally provided with a bent portion at one end on the side that abuts the drive arm. Further, before the drive arm reaches the rotation end on the side where the cassette holder is brought to the second position, a part of the drive arm comes into contact with the elastic member, and the position regulation by the stopper is released to release the elasticity. A cassette mounting device, wherein a guide member is integrally formed with the drive arm so that the elastic member does not separate from the drive arm when the member is displaced against the rotational biasing force of the member.