JP3433087B2 - Tape cassette mounting device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cassette mounting device suitable for use in a video tape recorder (VTR) as a magnetic recording / reproducing device. 2. Description of the Related Art A conventional tape cassette mounting apparatus has a metal chassis in which, for example, three inverted L-shaped guide grooves are formed in a pair of left and right side plates, respectively, and along the guide grooves. A cassette holder is provided which can be moved up and down between a cassette insertion position (cassette unloading position) and a cassette mounting position below the cassette insertion position (cassette loading completion position on the rotating drum side). The cassette holder will be briefly described with reference to FIGS. 8 and 9. The cassette holder 5 is made of a metal rectangular plate-shaped bottom plate 6 on which the tape cassette 9 is mounted, and has a predetermined height with respect to the bottom plate 6. A left and right side plate portion 8, 8 ′ made of synthetic resin and attached to and fixed to both ends of the bottom plate portion 6 and the top plate portion 7 by fitting, etc. And has a substantially rectangular cylindrical shape for inserting and holding the tape cassette 9. Then, with the tape cassette 9 inserted and held in the cassette holder 5 having the above-described configuration, the cassette holder 5 is reciprocated between the cassette insertion position and the cassette mounting position to load the cassette. . However, in the cassette holder 5 used in the above-mentioned conventional tape cassette mounting apparatus, the top plate 7 and the bottom plate are provided on the upper and lower ends of a pair of left and right side plates 8, 8 '. Once the part 6 is assembled, the top plate 7 cannot be removed from the upper ends of the pair of side plate parts 8 and 8 '. For example, the tape cassette 9 could not be removed from the top plate 7 side of the cassette holder 5 at the cassette loading completed position. Accordingly, the present invention has been made to solve the above-mentioned problems, and provides a tape cassette mounting device which can easily remove a tape cassette from a top plate side of a cassette holder when an abnormality such as a failure occurs. The purpose is to do. According to a first aspect of the present invention, there is provided a chassis having guide grooves formed on both side plate portions, a cassette insertion position along the guide grooves, and a cassette mounting position below the cassette insertion position. A cassette holder that can be moved up and down between the cassette holder and the cassette insertion position with the cassette mounted in a state in which the tape cassette is inserted and held between the bottom plate portion and both side plate portions and the top plate portion of the cassette holder. in the tape cassette loading apparatus so as to reciprocate between positions, the both of said cassette holder
The upper end of the side plate is engaged with both ends of the top plate.
With a recess, both ends of the top plate can be removed
And a flexible locking claw that locks the top plate portion, and the top plate portion is detachably mounted above the both side plate portions of the cassette holder. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a main part of a tape cassette mounting device built in a video tape recorder (VTR) as a magnetic recording / reproducing device according to an embodiment of the present invention. FIGS. 2 and 3 are tapes of the VTR. It is a right view of a cassette mounting apparatus. As shown in FIGS. 2 and 3, a tape cassette mounting device 10 is built in the outer casing 2 of the VTR 1. The upper part of the outer casing 2 is open, and is detachably covered by the upper cover 3. The tape cassette mounting device 10 has a pair of left and right side plates 13, 13 '(only the right side plate is shown in the figure).
A metal chassis 11 having three inverted L-shaped guide grooves 14a, 14b, and 14c formed therein, respectively, and a pair of left and right side plate portions 22 made of synthetic resin along the guide grooves 14a, 14b, and 14c. The cassette insertion position (the cassette unloading position shown in FIG. 2) and the cassette mounting position below the cassette insertion position (the unillustrated rotation shown in FIG. 3) through the cylindrical guide bosses 22a, 22b and 22c projecting from The cassette holder 20 which can be moved up and down between the cassette holder 20 and a cassette loading completion position on the drum side, and is rotatably supported via a rod-shaped support shaft 33 on the lower front side of the pair of side plates 13, 13 'of the chassis 11. The U-shaped slit 32a of the pair of right and left upright portions 32 (only the right upright portion in the figure is shown) is inserted into both side plate portions 2 of the cassette holder 20.
The cassette holder 20 is engaged with the driving guide boss 22d on the upper front end of the cassette holder 20 and the guide grooves 14a, 1 '.
And a metal driving arm (driving means) 30 that moves up and down along 4b and 14c. As shown in FIGS. 2 and 3, a metal chassis 11 has a bottom plate portion 12 and a pair of left and right side plate portions 13 which are bent vertically upward on both sides of the bottom plate portion 12.
13 and the front is U-shaped. The first guide groove 14a is provided on the upper side substantially at the center of each side plate portion 13, the second guide groove 14b is provided on the lower front side of each side plate portion 13, and the first guide groove 14b is provided on each side plate portion 13. 14a from below the bottom plate 12
The third guide grooves 14c are respectively formed below. The third guide groove 14c protrudes below the bottom plate 12. As shown in FIGS. 1 and 4 (a), 4 (b) and 4 (c), the cassette holder 20 is made of a metal-made rectangular bottom plate 21 on which the tape cassette 9 is mounted. A pair of left and right side plates 22 and 22 ′ made of synthetic resin fixed to both sides of the bottom plate 21, and a flexible locking claw 24 is formed in an engagement recess 23 formed at the upper end of the both sides 22, 22 ′. Metal-made rectangular plate-shaped top plate portion 25 detachably attached via
And has a substantially rectangular cylindrical shape for inserting and holding the tape cassette 9. Each of the side plates 22, 22 'has an inverted L-shaped side surface, and the guide grooves 14a, 14b, 14 of the both side plates 13 of the chassis 11 are formed on the outer surfaces of the both side plates 22, 22'.
c and each of the cylindrical guide pins 22 to be inserted into and engaged with
a, 22b and 22c are integrally formed to protrude, respectively.
Further, an L-shape for holding the tape cassette 9 in the cassette holder 20 by contacting a part of the front surface 9a of the inserted tape cassette 9 to the rear edge side of the bottom plate portion 21 on the inner surface of both side plate portions 22 and 22 '. A stopper 22e is integrally formed to protrude. As shown in FIGS. 1 and 6 (a), the engaging recesses 23 at the upper ends of both side plate portions 22 and 22 '
First hook 2 integrally formed on the upper end surface of each of the first and second hooks 2 and 22 '
The second, third hook 23b, 23c and a fourth hook 23d that is integrally protruded on a side surface of the lower flexible locking claws 2 4 and 3a, which are integrally formed to project downward of the side surface And the second and third hooks 23b and 23c are attached to the top plate 25.
A pair of hooks 25 bent vertically below both ends of the
The hook 25a of the top plate 25 is made freely engageable and disengageable with the fourth hook 23d. The free ends 24a of the flexible locking claws 24 formed integrally on the upper end surfaces of the both side plate portions 22 and 22 'are protruded upward in a triangular prism shape and elastically downward through the slits 24b. Deformable. And both side plate part 2
The front edge 25c of each end of the top plate 25 and the rear end of both ends are formed between the first hook 23a of the engaging recess 23 of the second and the 22 'and the free end 24a of the flexible locking claw 24. The notch 25d is locked with the free end 24 of the flexible locking claw 24.
The locking state is released by moving the top plate 25 rearward while pushing down a with a pressing jig K such as a ballpoint pen, for example. It should be noted that the label 29 shown in FIG.
It is stuck on the upper surface of the top plate 25 as indicated by a chain line. As shown in FIG. 2 and FIG.
Is formed in a front U-shape by a substantially rectangular plate-shaped horizontal portion 31 and a pair of left and right upright portions 32, 32 bent and formed vertically upward on both sides of the horizontal portion 31. The cassette holder 20 is arranged in the sections 32,32. The lower side of each upright portion 32 is rotatably supported by a rod-shaped support shaft 33. A U-shaped slit 32a is formed from the upper end to the center of each upright portion 32.
The slits 32a of the upright portions 32 are engaged with driving guide bosses 22d on the upper front ends of both side plates 22, 22 'of the cassette holder 20. Then, the drive arm 30
Is rotatable clockwise and counterclockwise through a drive motor (drive source) and a drive gear (not shown). The cassette holder 20 is inserted into and held in the cassette holder 20. The cassette is reciprocated between a cassette insertion position shown in FIG. 2 and a cassette mounting position shown in FIG. As shown in FIG. 1, approximately at the center of the right side plate 22 'of the cassette holder 20, the front cover of the tape cassette 9 when the tape cassette 9 is inserted and held in the cassette holder 20 is provided. A flexible spring piece 40 having a release pin 41 for releasing the lock of the front lid 9c of the tape cassette 9 by pressing the lock release button 9b is integrally formed, and the right side plate 22 'is formed. The release pin 41 of the flexible spring piece 40 is attached to the front cover lock release button of the tape cassette 9 on the cylindrical support shaft portion 22f integrally formed at a position adjacent to the flexible spring piece 40 on the outer surface. A lock release lever 50 made of metal which is operated in the pressing direction of 9b is rotatably supported. The lock release lever 50 is always urged in the clockwise direction in the figure by a torsion coil spring 51 interposed between the right side plate portion 22 'and the torsion coil spring 51. Also,
The unlocked front lid 9c is attached to the cassette holder 20.
Is fully opened by a lid opener (front cover opening member) (not shown) when the cassette loading position is reached. Further, a metal plate-like lever (not shown) having substantially the same shape as the lock release lever 50 having a cassette contact portion is also rotatably supported on the left side plate portion 22 of the cassette holder 20. According to the tape cassette mounting device 10 of the VTR 1 of the embodiment described above, when the drive arm 30 is rotated clockwise in the drawing at the cassette insertion position shown in FIG. 2, the slit of the upright portion 32 of the drive arm 30 is opened. The cassette holder 20 horizontally moves along the first and second guide grooves 14a and 14b via the guide bosses 22d for driving the side plates 22, 22 'of the cassette holder 20 engaged with the cassette holder 32a. At the end of this horizontal movement, the guide bosses 22c of the cassette holder 20 engage with the third guide grooves 14c of the side plate portion 13 of the chassis 11, and the three guide bosses reach the cassette mounting position shown in FIG. 22a, 22
The cassette holder 20 moves along the vertical portions of the three guide grooves 14a, 14b, 14c by b and 22c. At the cassette loading completion position shown in FIG. 3, when an abnormality such as a failure of the VTR occurs,
As shown in FIG. 7, the upper cover 3 of the outer casing 2 of the VTR 1 is removed, and then the free ends 24a of the flexible locking claws 24 on both side plates 22, 22 'of the cassette holder 20 are pressed. When the top plate 25 is shifted rearward while being pushed down by the jig K, the top plate 25 can be easily removed from both side plate portions 22 and 22 '. Thus, the tape cassette 9 is removed from the cassette holder 20 in the cassette loading completed state, and the upper cover 3 of the outer casing 2 of the VTR 1 is removed.
, The tape cassette 9 can be easily taken out. This removal method can be easily performed by any user by performing the removal procedures A and B of the top plate section 25 described on the label 29 attached to the upper surface of the top plate section 25, and , Can be easily installed in the reverse order. As described above, according to the tape cassette mounting apparatus of the first aspect of the present invention, the cassette holder
Engagement recesses that engage both ends of the top plate at the upper ends of both side plates
Parts, and both ends of the top plate can be removed freely.
Since a flexible locking claw for locking is provided, and the top plate is detachably attached to the upper side of both side plates of the cassette holder,
The abnormality such as a failure of the tape cassette loading apparatus, the flexible engagement
The tape cassette can be easily removed from the top plate side of the cassette holder by a simple operation of simply pressing the pawl in a predetermined direction . [0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a state in which a top plate of a cassette holder used in a tape cassette mounting device according to an embodiment of the present invention has been removed from a side plate thereof. FIG. 2 is a right side view showing a state of the tape cassette mounting device at the time of cassette unloading. FIG. 3 is a right side view showing a state where the cassette loading of the tape cassette mounting device is completed. FIG. 4A is a plan view of the cassette holder,
(B) is a front view of the cassette holder, and (c) is a left side view of the cassette holder. FIG. 5 is an explanatory diagram of a label on which a method of removing a top plate attached to the upper surface of the top of the cassette holder is described. 6A is a perspective view of a locking portion between a side plate portion and a top plate portion of the cassette holder, and FIG. 6B is an enlarged perspective view of a portion X in FIG. 6A. 7A is a plan view of the cassette holder with the top plate removed, FIG. 7B is a front view of the cassette holder with the top plate removed, and FIG. It is a left view in the state where the top plate part was removed. FIG. 8 is a front view of a cassette holder used in a conventional tape cassette mounting apparatus. FIG. 9 is a plan view showing a state before assembling the cassette holder of the conventional example. DESCRIPTION OF THE SYMBOLS 9 Tape cassette 10 Tape cassette mounting device 11 Chassis 13, 13 ′ Side plate portions 14 a, 14 b, 14 c Guide groove 20 Cassette holder 21 Bottom plate portion 22, 22 ′ Side plate portion 23 Engaging recess 24 Flexible Locking claw 25 Top plate

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 15/675

Claims (1)

(1) A chassis having guide grooves formed on both side plate portions, and a vertically movable guide along the guide grooves between a cassette insertion position and a cassette mounting position below the cassette insertion position. The cassette holder is provided between the cassette insertion position and the cassette mounting position in a state where the tape cassette is inserted and held between the bottom plate portion and both side plate portions and the top plate portion of the cassette holder. In the tape cassette mounting device which is configured to reciprocate, the upper end portion of the both side plate portions of the cassette holder has the
An engagement recess for engaging both ends of the top plate is provided.
Flexible locking claw that detachably locks both ends of the top plate
The provided, on the upper side of the side plate portions of said cassette holder, the tape cassette loading device being characterized in that removably attached to the top plate portion.