JPH0457241A - Door-opening / closing device - Google Patents

Abstract

PURPOSE:To obtain the door opening / closing device not to damage operability by releasing a lock due to a lock piece by pressing a part to be pressed in a guide piece, and opening a door. CONSTITUTION:In the state of closing a door 3, the door 3 is set at a turn limit position in a counter-clockwise direction by the elastic force of a spring 4 and at such a time, a lock piece 7 falls downward by the dead weight in the state of fitting a lock part 7a to a recessed part 1a for lock of a front panel 1. Therefore, the door 3 is locked in the closed state and even when a child or the like pushes any part excepting for a part 6b to be pressed, the door 3 is not opened. Then, it can be prevented that any foreign material is inserted from an opening 2 by ''mischief'' or the like by opening the door 3. When inserting a tape cassette in this state of closing the door 3, the tape cassette (not shown in the figure) is carried to the front side of the door 3 and pushed in an arrow A direction while abutting the tape cassette to the part 6b to be pressed in the guide piece 6 protruded from the front face of the door 3.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an opening/closing device for a door provided in an opening for inserting a tape cassette in, for example, a VTR, and particularly relates to a lock capable of holding the door in a closed state. The present invention relates to a door opening/closing device equipped with a mechanism.

[Prior Art] A conventional door opening/closing device for a VTR will be explained with reference to FIGS. 7 and 8. Figure 7 is a perspective view showing the external appearance of the VTR;
The figure is a side sectional view of the same main part.

In FIGS. 7 and 8, reference numeral 1 denotes a front panel disposed on the front surface of the VTR, which is provided with various operating sections and the like, as well as an opening 2 for inserting and removing a tape cassette. Reference numeral 3 denotes a door (cassette door), the support shaft portions 3a at both upper ends of which are pivotally supported by the front panel 1;
The opening 2 can be placed in a closed position or an open position. Reference numeral 4 denotes a spring that gives the door 3 the ability to rotate in the closing direction, and is actually constituted by a torsion spring provided on the support shaft portion 3a. In the closed state of the door 3 shown by the solid line in FIG. 8, although not shown, the locked portion of the door 3 is in contact with the stopper of the front panel 1, and the door 3 is moved counterclockwise in the figure. It is at the rotation limit position in the rotational direction.

Reference numeral 5 designates an eject arm that is rotatable about a fulcrum P, and the eject arm 5 is connected to the back surface of the door 3. The eject arm 5 described above constitutes a part of a known eject mechanism, and is
When ejecting the tape cassette installed inside the R body,
The door 3 is rotated from the closed position to the open position (the position indicated by the broken line in FIG. 8). Furthermore, 3b,
Reference numerals 3b are protrusions formed on both front sides of the door 3. In order to prevent the main body part of the door 3 from being damaged when inserting a tape cassette, the protrusions 3b are The tape cassette is brought into contact with the tape cassette.

In the above configuration, when the tape cassette is inserted from the direction of the arrow in FIG. 8, the tape cassette hits the convex portion 3b, and the door 3 is rotated clockwise against the spring 4 and opened, to a predetermined position. The tape cassette that has been inserted up to this point is transported to a reel stand position within the VTR main body, for example, by a shift mechanism (not shown), and is placed in a mounted state. Further, after the tape cassette passes through the door 3 portion, the door 3 returns to the closed state by the force of the spring 4. For example, after recording or playback is finished, when an eject button (not shown) is operated, the tape cassette is lifted and conveyed from the mounting position by the shift mechanism, and the eject arm 5
The door 3 is opened, and the tape cassette is ejected from the opening 2 by the eject mechanism.

[Problems to be Solved by the Invention] As described above, in the conventional structure, the door does not have a locking mechanism, and the door can be opened by pressing any part of the door in the closed state. However, if the door does not have a locking mechanism, the door can be opened at any time, and there is a problem in that an accident may occur where a child or the like carelessly opens the door and inserts a foreign object.

The present invention has been made in view of the above points, and its purpose is to reduce as much as possible the possibility that a closed door will be opened inadvertently, and to release the door lock and open the cassette. It is an object of the present invention to provide a door opening/closing device which can be inserted at the same time and does not impair operability.

5 Means for Solving the Problem] In order to achieve the above-mentioned object, the door opening/closing device according to the present invention is rotatably attached to the front panel and has a spring in the direction of closing the opening for loading and unloading the recording medium. an energized door; a lock piece that is slidably attached to the door by a predetermined amount and that can engage with a locking recess formed in the front panel to hold the door in a closed state; Attached for fixed rotation,
Until the lock piece is slid from the locked position to the unlocked position, it rotates on the door, and after the lock piece is slid to the unlocked position, it is integrated with the door and rotates the door. a guide piece that moves with the movement of the door, and when the lock piece is at least in the locking position described above, the pressed portion of the guide piece is in a state of protruding toward the front side of the door; By pressing the suppressed portion of the door, the lock by the lock piece is released and the door can be opened.

[Function] When the door is in the closed state, the lock piece is engaged with the locking recess in the front panel, so even if the door itself is pushed, the lock will not be released, and there is no possibility that the door will be opened inadvertently. few. Then, in the locked/closed state, when the pressed part of the guide piece protruding toward the front side of the door is pushed in with a tape cassette, the guide piece rotates a predetermined amount on the door, and in conjunction with this rotational movement. The lock piece is slid and driven from a locking position (locked position) to a non-locking position, and the lock is released. When the tape cassette is further pushed in after the lock is released, the guide piece that has reached its rotation limit position is integrated with the door, and the door rotates in the opening direction.

Therefore, with the same tape cassette insertion format as before,
It is possible to release the door lock and insert the cassette at the same time.

[Embodiment 1] The present invention will be explained below using an embodiment shown in FIGS. 1 to 6.

Figure 1 is a perspective view showing the external appearance of the VTR, Figure 2 is a sectional side view of the main part of the door opening/closing mechanism when it is in the locked state, and Figure 3 is the door opening/closing mechanism when it is in the unlocked state. 4 is a back view of the main parts of the door opening/closing mechanism when it is in the locked state, FIG. 5 is an enlarged sectional view of the main parts along the Y-Y line in FIG. 4, and FIG. 6 4 is a sectional view of a main part taken along the line X-x in FIG. 4. FIG.

As shown in FIG. 1, the front panel l installed on the front of the VTR is equipped with various operation sections.
An opening 2 (see FIG. 2) for taking in and out a tape cassette is provided, and a door (cassette door) 3 for closing and opening this opening 2 is attached.

Reference numeral 6b denotes a pressed portion of a guide piece 6, which will be described later, which is attached to the door 3 so as to be rotatable by a predetermined amount.When the door 3 is in the closed state, it protrudes from the front surface of the door 3 by a predetermined amount, and the tape cassette When the cassette case is inserted, the pressed portion 6b is pressed by the cassette case.

The door 3 has support shafts 3a (see FIG. 4) at both upper ends thereof that are pivotally supported by bearings (not shown) of the front panel 1, and the door 3 rotates around the support shafts 3a as rotation fulcrums. The opening 2 can be moved between a closed position and an open position.

Further, as shown in FIGS. 2 and 3, the door 3 is provided with the ability to rotate in the closing direction by a spring 4, and in the closed state of the door 3 shown in FIG. The locked portion of the door 3 is in contact with the stopper of the front panel 1, so that the door 3 is at its rotation limit position in the counterclockwise direction in the figure. Note that the spring 4 is actually constituted by a torsion spring provided at the support shaft portion 38, as in the conventional case.

Reference numeral 6 denotes a guide piece attached to the door 3 so as to be rotatable by a predetermined amount, and as shown in FIG. 6
A connected part 6d for the eject arm 5 extending laterally from the main body 1m6a, an L-shaped arm 6e connected to the main body 6a, and a lock piece to be described later on the tip end of the arm 6e. The engaging portion 6f with 7 and the like are integrally formed. The guide piece 6 has a support shaft portion 6c.

6C is rotatably held in the bearing part of the door 3, and is rotatable by a predetermined amount with respect to the door 3 about the support shaft part 6c as the center of rotation, and the vertically elongated protrusion-shaped pressed part 6b
However, it can be inserted through a notch in the door 3 and protrude from the front surface of the door 3 by a predetermined amount.

Reference numeral 5 designates an eject arm that is rotatable about the fulcrum P shown in FIG. It is connected to the section 6d. This eject arm 5 constitutes a part of a known eject mechanism, and when ejecting a tape cassette installed in the VTR main body, it is ejected from the door 3 via the guide piece 6.
from the closed position to the open position.

Reference numeral 7 denotes a lock piece attached to the back side of the door 3 so as to be slidable by a predetermined amount, and as shown in FIG. 4, a locking part 7a, an engaged hole 7b, etc. are integrally formed. ing. The lock piece 7 is guided by guide pieces 3c formed on the back side of the door 3, and is slidable in the vertical direction as shown in FIG. In the closed state shown in FIG. 3, the lock piece 7 slides downward by its own weight, and the locking part 7a is fitted into the locking recess 1a formed in the front panel l. Further, the engaged hole 7
b is engaged with the engaging portion 6f of the guide piece 6, as shown in FIG.

As is clear from the figure, when the engaging portion 6f (guide piece 6) moves in the direction of arrow R, the lock piece 7 is driven by the inclined portion of the engaging portion 6f and moves in the direction of arrow B (
When the locking part 7a is pulled up and slid, the locking part 7a is removed from the locking recessed part 1a.

Next, the operation based on the above-described configuration will be explained. In the closed state of the door 3 shown in FIG. 2.4, the elastic force of the spring 4 places the door 3 at the counterclockwise rotation limit position, and at this time, as described above, the lock piece 7 falls downward under its own weight, and its locking portion 7a is fitted into the locking recess 1a of the front panel 1. Therefore, the door 3 is locked in a closed state, and even if an infant or the like presses any part other than the pressed part 6b, the door 3 will not be opened, and the door 3 will not be opened inadvertently. It is possible to prevent a foreign object from being inserted through the opening 2 due to a "trash" or the like.

When inserting a tape cassette from the closed state of the door 3, the tape cassette (not shown) is brought to the front side of the door 3, and the tape cassette is pushed by the guide piece 6 protruding from the front surface of the door 3. 6b and push it in the direction of arrow A shown in FIGS. 3 and 6. The guide piece 6, whose pressed portion 6b is pressed by the tape cassette, rotates by a predetermined amount in the clockwise direction in FIG. Driven by the inclined portion of the engaging portion 6f of the guide piece 6, the lock piece 7 is pulled up in the direction of arrow B in FIGS. is removed from the locking recess 1a of the front panel 1, and the door 3 is unlocked.

Guide piece 6 shown by solid line in Figure 3 and broken line in Figure 6
shows the state immediately after the lock is released, and as shown in FIG. 6, the pressed portion 6b of the guide piece 6 is at a distance S.
Although the pressed portion 6b is in the pushed state, the door 3
At this time, the guide piece 6 is at its rotation limit position in the pushing direction, where the flat surface of the lower end of the arm @6e is in contact with the lock piece 7. Therefore, if the tape cassette continues to press the pressed portion 6b in the direction of arrow A, after the lock is released.

The guide piece 6 and the door 3 are integrated via the lock piece 7, and the door 3 is rotated in the opening direction (clockwise in FIG. 3) together with the guide piece 6 and the lock piece 7, and the tape cassette is is inserted into the VTR main body from the opening 02 described above. Thereafter, the tape cassette that has been inserted to a predetermined position is transported to a reel stand position inside the VTR main body, for example, by a shift mechanism (not shown), and is placed in the installed state.9 Also, after the tape cassette passes through the door 3 , the door 3 returns to the closed state shown in FIG. 2.4 by the force of the spring 4.

In this way, in this embodiment, the tape cassette is inserted by simply pushing the tape cassette in the same way as before, and the door lock can be released and the cassette inserted at the same time, making it easy to use.

Further, when an eject button (not shown) is operated after recording or playback is finished, the tape cassette is lifted and conveyed from the mounting position by the shift mechanism, and the guide piece 6 is moved by the eject arm 5 from the state shown in FIG. When the guide piece 6 is rotated by a predetermined amount in the clockwise direction, the lock piece 7 is slid upward and the lock is released, and then the eject arm 5 continues to rotate in the same direction. Due to the movement, the guide piece 6
The door 3 is opened together with the opening 2, and the tape cassette is ejected from the opening 2 by the eject mechanism.

Although the present invention has been described above with reference to the illustrated embodiments, it goes without saying that various modifications can be made by those skilled in the art without departing from the spirit of the present invention. After unlocking with
The door 3 may be opened by pushing the door itself with a tape cassette. Further, the guide piece 6 and the lock piece 7 need not be arranged at two locations as shown in the figure, but may be arranged at only one of them. Furthermore, it goes without saying that the present invention is applicable to various recording and reproducing devices other than VTRs, such as cassette tape recorders, and devices that use recording media (such as magnetic disks and optical disks) built into hard cases. .

[Effects of the Invention] As described above, according to the present invention, the possibility of a closed door being opened inadvertently can be reduced as much as possible, and moreover, the door can be unlocked and the cassette inserted at the same time. , it is possible to provide a door opening/closing device that does not impair operability, and its value is great.

[Brief explanation of the drawing]

tJ1-FIG. 6 relate to one embodiment of the present invention, FIG. 1 is a perspective view showing the external appearance of the VTR, FIG. Figure 3 is a side cross-sectional view of the main parts of the door opening/closing mechanism in the state immediately after unlocking, Figure 4 is a rear view of the main parts of the door opening/closing mechanism in the locked state, and Figure 5 is the An enlarged cross-sectional view of the main part along line Y-Y in the figure, No.6 (!l is a cross-sectional view of the main part along the Accordingly, FIG. 7 is a perspective view showing the external appearance of the VTR, and FIG. 81!
! 1 is a sectional side view of the main part of the door opening/closing mechanism when it is in a locked state. l...front panel, 1a...lock recess, 2...opening, 3...door,
3a... Support shaft portion, 3c... Guide piece, 4
... Spring, 5 ... Eject arm,
6...Guide piece, 6a...Main part, 6b...Pressed part, 6c...Spindle part, 6d...Pressed part Connecting part, 6e"... Arm part, 6f... Engaging part, 7... Lock piece, 7a... Lock retaining part, 7b, old...・Engaged hole. Fig. 1 Fig. 2 Fig. 31! I Fig. 5 Fig. 4 Fig. 6 Fig. 7

Claims (1)

[Claims] 1. A door rotatably attached to the front panel and biased by a spring in a direction to close an opening for taking in and taking out a recording medium; and a door attached to the door so as to be slidable by a predetermined amount. , a lock piece capable of holding the door in a closed state by engaging with a locking recess formed in the front panel; and a lock piece that is rotatably attached to the door by a predetermined amount and that locks the lock piece from the locked position. A guide piece that rotates on the door until the lock piece is slid to a locked position, and that is integrated with the door and moves as the door rotates after the lock piece is slid to a non-locked position. and when the lock piece is at least in the locking position described above, the pressed portion of the guide piece is in a state of protruding toward the front side of the door, and the pressed portion of the guide piece is pressed. The door opening/closing device is characterized in that the door can be opened by releasing the lock by the lock piece. 2. The door opening/closing device according to claim 1, wherein the pressed portion of the guide piece can be pressed by a hard case housing the recording medium. 3. The door opening/closing device according to claim 1, wherein the guide piece is connected to an eject member in the device body on the back side of the door.