JP2754939B2 - Cassette mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Recently, video tape recorders (hereinafter, referred to as video tape recorders) have been developed.
Notated as VTR. ), Etc., are mainly of a front loading type in which a cassette is mounted from the front, and these apparatuses are required to be miniaturized. Hereinafter, an example of the above-described cassette mounting device will be described with reference to the drawings.

FIG. 4 shows a configuration of a conventional cassette mounting device. In FIG. 4, 1 is a cassette holder for accommodating a cassette, 2 and 2 'are side wall members arranged on both sides of the cassette holder 1, and 3 and 3' are first guide grooves provided on the side wall members 2 and 2 '. 3a, 3a 'and a guide groove having second guide grooves 3b, 3b' continuously formed in a right angle or a substantially right angle direction from one end of the first guide groove, and usually includes two or three guide grooves, respectively. Is done. Reference numerals 4 and 4 'denote side plates integrally formed on both sides of the cassette holder 1, and guide pins 5, 5' respectively engaging with guide grooves 3, 3 'provided in the side wall members 2, 2'. Are provided in correspondence with the number of. 6, 6 'are connected by a shaft 7,
Drive arms rotatably supported by the side wall members 2 and 2 ', and guide plates 8 and 8' including escape portions 8a and 8a 'provided at the distal end, are provided with side plates 4 and 4' of the cassette holder 1.
The upper main guide pins 5, 5 'are respectively engaged. One side of the drive arm 6 or 6 ′ is coaxial with the shaft 7 and the gear 9
Are integrally configured. Reference numeral 10 denotes a rack, which is a rack guide groove 10a formed so as to be fitted to two guide pieces 11 and 11 'provided on the side wall member 4 or 4' so as to be movable horizontally.
10a ', having at its one end several teeth 12 meshing with the gear 9 and a gear 9 integral with the drive arm 6 or 6'.
And the same number of teeth 13 as the teeth 12 formed in a region that does not mesh with
Consists of Reference numerals 14 and 14 'denote E-rings inserted into recesses 7a and 7a' provided on the shaft 7 as shown in FIG. 1
Reference numerals 5 and 15 'denote urging members which are provided on the spring insertion portions 6a and 6a' of the drive arms 6 and 6 ', respectively.
Each tip is appropriately hooked on a spring stopper 6b, 6b 'and 6c, 6c' formed integrally with the spring stopper. Further, at least the escape portions 8a, 8a 'of the guide grooves 8, 8' provided at the distal ends of the drive arms 6, 6 ',
8 'and the biasing members 15, 15'
The main guide pins 5, 5 'on the side plates 4, 4' are engaged with each other. 16 is rack 1
The switch element interlocks with the operation of No. 0 and detects the end of the operation stroke of the rack 10. The switch main body is fixed to the side wall member 2 or 2 '. Reference numeral 17 denotes an output gear provided on the magnetic recording / reproducing apparatus main body.
3 is to be meshed. The drive arms 6, 6 ', the shaft 7, the rack 10, the switch element 16, and the output gear 17 for driving the holder constitute a cassette holder driving means.

[0004] The operation of the conventional cassette mounting apparatus configured as described above will be described below.

When the cassette is inserted into the cassette holder 1 from the front, the switch element 16 operates, a drive motor (not shown) provided in the magnetic recording / reproducing apparatus body starts rotating, the output gear 17 rotates, and the rack 10 is moved. It moves to rotate the drive arms 6, 6 '. Therefore, the drive arm 6,
Guide pins 5 engaged with guide grooves 8 and 8 'provided in 6'
The cassette holder 1 integrated with 5 'is a side wall member 2, 2'
6 from the horizontal movement to the vertical movement along the L-shaped guide grooves 3, 3 'of FIG.
State.

In this state, the drive arms 6, 6 'are in a state in which the guide pins 5, 5' integrally formed on the side surface of the cassette holder 1 are inserted into the escape portions 8a, 8a 'of the guide grooves 8, 8'. Has been turned up. Accordingly, the guide pins 5, 5 'are connected to the urging members 15, 15' provided on the drive arms 6, 6 '.
Is biased by a spring.

[0007]

However, as described above, generally, in the conventional cassette mounting apparatus, in order to prevent the drive arm from coming off from the rotation support shaft of the drive arm,
After the drive arm is inserted into the rotation support shaft, there is a problem that a part for retaining the drive arm is required, which increases the cost. In addition, when components for retaining are not used, it is necessary to form the boss portion of the drive arm long and press-fit the boss portion to the rotation support shaft, so that there is a problem that the width becomes large.

[0008]

According to the present invention, a cassette holder capable of detachably holding a cassette and a guide pin protruding from a side plate of the cassette holder are movably inserted into the cassette holder. A first position at which a cassette can be attached and detached, a first guide groove for guiding reciprocation between a second position at which recording or reproduction of the cassette is possible, and a right angle or an angle from one end of the first guide groove. Driving the guide pins so as to bring the cassette holder in the direction from the first position to the second position and in the opposite direction from the first position and the two side wall members having the second guide grooves formed continuously in a substantially perpendicular direction. A cassette holder driving means having a rotatable drive arm for rotating the cassette holder in the second position when the cassette holder is in the second position; And the other end provided with a biasing member to drive the arm so as to be positioned in a recess provided in the rotating shaft of the drive arm, the drive arm has a configuration which does not come off from the rotation support shafts.

[0009]

According to this structure, the drive arm can be prevented from coming off the rotation support shaft by utilizing one end of the biasing member.

[0010]

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

FIG. 1 shows the configuration of a cassette mounting apparatus according to one embodiment of the present invention. In FIG. 1, the same components as those of the conventional example are denoted by the same reference numerals, and detailed description will be omitted. Drive arms 18 and 18 'are connected by a shaft 19 and rotatably supported by the side wall members 2 and 2'. The drive arms 18 and 18 'are provided in guide grooves 20 and 20' including escape portions 20a and 20a 'provided at the distal ends. Side plate 4 of cassette holder 1,
The main guide pins 5, 5 'on 4' are respectively engaged. One side of the drive arm 18 or 18 ′ is formed integrally with the gear 9 coaxially with the shaft 19. Reference numeral 10 denotes a rack having rack guide grooves 10a, 10a 'formed so as to be able to move horizontally by fitting into two guide pieces 11, 11' provided on the side wall member 2 or 2 ', and at one end thereof. It consists of a number of teeth 12 meshing with the gear 9 and the same number of teeth 13 as the teeth 12 formed in a region which does not mesh with the gear 9 integral with the drive arm 18 or 18 '.

Numerals 21 and 21 'denote urging members for driving arm 1.
8, 18 'are provided on the spring insertion portions 18a, 18a', and one end thereof is appropriately hung on spring stops 18b, 18b 'formed integrally with the drive arms 18, 18'. The other end is inserted into a recess 19a, 19a 'provided in the shaft 19 as shown in FIG. 2 so that the drive arms 18, 18' do not come off the shaft 19.

Further, at least the escape portions 20a and 20a 'of the guide grooves 20 and 20' provided at the distal ends of the drive arms 18 and 18 'are formed by at least the guide grooves 20 and 20' and the urging members 21 and 21 '. The main guide pins 5, 5 'on the side plates 4, 4' of the cassette holder 1 are adapted to be engaged respectively.

The operation of the cassette mounting apparatus of the present invention configured as described above will be described below.

When the cassette is inserted into the cassette holder 1 from the front side, the switch element 16 is actuated, the drive motor (not shown) provided in the magnetic recording / reproducing apparatus main body starts rotating, the output gear 17 rotates, and the rack 10 moves. Then, the drive arms 18 and 18 'are rotated. Therefore, drive arm 1
The cassette holder 1 integrated with the guide pins 5, 5 'engaged with the guide grooves 20, 20' provided in the 8, 18 'is arranged along the L-shaped guide grooves 3, 3' of the side walls 2, 2 '. Then, the movement from the horizontal movement to the vertical movement is performed, and the cassette mounting operation is completed to be in the state of FIG.

In this state, the drive arms 18, 18 '
The guide pins 5, which are integrally formed on the side surfaces of the cassette holder 1 in the escape portions 20a, 20a 'of the guide grooves 20, 20',
It has rotated to the state where 5 'has entered. Therefore, the guide pins 5, 5 'are spring-biased by urging members 21, 21' provided on the drive arms 18, 18 '.

[0017]

As is clear from the above description, the drive arm can be moved from the rotary support shaft in an extremely simple and inexpensive configuration by effectively utilizing one end of the biasing member and having the same role as the E-ring. It is possible to prevent the fastener from coming off, and it is possible to obtain the effect of reducing the number of fastening parts and reducing the size.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cassette mounting apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic sectional view of a main part for explaining the configuration of the embodiment.

FIG. 3 is a schematic side view of a main part for explaining the operation of the embodiment.

FIG. 4 is a perspective view showing a configuration of a conventional cassette mounting apparatus.

FIG. 5 is a schematic cross-sectional view of a main part for describing the configuration of the conventional example.

FIG. 6 is a schematic side view of a main part for explaining the operation of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cassette holder 2 Side wall member 2 'Side wall member 3 Guide groove 3' Guide groove 3a First guide groove 3a 'First guide groove 3b Second guide groove 3b' Second guide groove 4 Side plate 4 'Side plate 5 Guide pin 5 'Guide pin 18 drive arm 18' drive arm 19 shaft 19a recess 19a 'recess 21 biasing member 21' biasing member

Continuation of front page (72) Inventor Keiji Sakamoto 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. , U) (58) Field surveyed (Int. Cl. ⁶ , DB name) G11B 15/675 101

Claims (1)

(57) [Claims] A cassette holder capable of detachably holding a cassette and a guide pin protruding from a side plate of the cassette holder are movably inserted therein, and the cassette holder can be detachably attached to the cassette holder. The first position, a first guide groove portion for guiding the cassette so as to be able to reciprocate between a second position where recording or reproduction of the cassette is possible, and a right angle or substantially right angle direction continuously from one end of the first guide groove portion. Both side wall members having the formed second guide groove portion,
Cassette holder driving means having 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, and the cassette holder Is in the second position, one end applies a biasing force to the cassette holder in the second position direction, and the other end biases the drive arm so as to be located in a concave portion provided on the rotation support shaft of the drive arm. A cassette mounting device comprising a member, wherein the drive arm is configured not to fall out of the rotation support shaft.