JPH0447789Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Purpose of the Invention" (Field of Industrial Application) The present invention relates to a locking device for locking a cassette holder at a predetermined position in a loading mechanism of a cassette tape recorder.

(Prior Art) Conventionally, a cassette inserted from a loading slot is housed in a cassette holder that is arranged to be able to rise and fall freely, and when the holder descends, the cassette is set in a predetermined position, and when the cassette is ejected, the cassette holder is moved. There is a tape recorder loading mechanism configured to rise.

(Problem that the invention aims to solve) However, in the case of a compact cassette, precision is required in the configuration of each part of the loading mechanism, and on the other hand, in order to miniaturize the entire device, it is necessary to reduce the number of parts and the configuration of each part. If it is simplified, the accuracy will be insufficient.

As mentioned above, miniaturization of the loading mechanism and the equipment as a whole and ensuring accuracy are contradictory to each other. Even in this case, the cassette holder itself must be held in a predetermined position, requiring greater precision than the loading mechanism for large cassettes.

The present invention has been devised in view of the above points, and its purpose is to accurately hold a cassette holder in which a cassette is to be accommodated at its upper limit position in a loading mechanism of a cassette tape recorder. An object of the present invention is to provide a locking device for a cassette holder.

"Structure of the invention" (Means for solving the problems) The cassette holder lock device in the loading mechanism according to the invention is arranged so that the cassette inserted from the loading opening is raised and lowered by the sliding action of the slider. In the loading mechanism of a tape recorder, which is housed in a cassette holder and configured to set the cassette in a predetermined position by lowering the holder, a cassette is installed on the chassis to guide a guide pin protruding from the side of the cassette holder. A guide groove is formed, and a lock claw is rotatably disposed near the guide groove and is biased by a torsion spring so as to constantly close the guide groove, and the closed state is closed by sliding the slider. The slider is provided with an engagement pin protruding from which the tip of the torsion spring engages when the slider slides in the opposite direction.

(Function) The cassette holder is at the upper limit position, and the cassette inserted from the loading port is accommodated in the cassette holder. At this time, the cassette holder must be reliably at the upper limit position. In this state, the lock pin protruding from the side of the cassette holder is at the upper limit position of the guide groove formed in the chassis, and the lock pin is always closed by the lock pawl biased by a torsion spring to close the guide groove. It is locked.

When the slider starts sliding, the slider engages with the lock pawl to release the guide groove from being blocked by the lock pawl, and in synchronization with this, the cassette holder descends and the cassette is set at a predetermined position.

When ejecting, the slider slides in the opposite direction, causing the cassette holder to rise, and when the guide pin reaches the upper limit position of the guide groove, the slider disengages from the locking pawl, causing the locking pawl to rotate and lock the guide pin. Lock. The slider continues its sliding motion, and as a result, the engagement pin protruding from the slider engages with the tip of the torsion spring, and as the slider slides further, the biasing force of the torsion spring is strengthened. . This makes the locking condition by the locking pawl more reliable.

Therefore, even if the cassette holder lifting guide means consisting of the guide pins, guide grooves, etc. described above is provided on only one side, the cassette holder can be reliably locked at its upper limit position.

(Example) Examples of the cassette holder lock device in the loading mechanism according to the present invention are shown in Figs.
The following will be explained based on the figures: Fig. 1 is a perspective view of the cassette holder, Fig. 2 is a plan view showing the support mechanism of the cassette holder, Fig. 3 is a perspective view of the main parts of the same,
Figure 4 is a perspective view of the main parts of the cassette holder locking device, Figure 5 is a right side view of the main chassis,
FIGS. 6A to 6D are side views of main parts showing the operation process.

The loading mechanism is such that when the cassette 100 is housed in the cassette holder 4, the cassette holder 4 is lowered and the cassette is set in a predetermined position, and when ejecting, the cassette holder is raised so that the cassette can be taken out. The cassette holder locking device 1 for locking the cassette holder 4 in its raised position is formed on the chassis 3 to guide a guide pin 52 protruding from the side surface of the cassette holder 4. The guide groove 31 is rotatably arranged and is biased by a torsion spring 11 so as to always close the guide groove 31, and is released from the closed state by sliding the slider 9. The locking pawl 10 and the slider 9
By sliding in the opposite direction, the torsion spring 1
1 and an engagement pin 15 protruding from the slider 9 so that the tip 11a of the slider 1 engages with the engagement pin 15.

To explain the above configuration in detail, the cassette holder 4 is shown as accommodating a cassette 100 of a rotary head type digital audio tape recorder (R-DAT), and has a bottom plate 41 and both side walls 42. It is formed into a substantially box shape by a guide piece 43 whose upper end is bent inward. This cassette holder 4 is arranged so as to be able to rise and fall freely inside the main chassis 3, which consists of a top plate 32 and both side walls 33, and holds a cassette 100 inserted through a loading slot by gripping it with a grip device (not shown). It is designed to be housed in a holder 4.

Mounting plates 5 are attached to both side walls 42 of the cassette holder 4 configured as described above, and one of the mounting plates has a notch 51 formed therein, and a guide pin having a roller 52a is formed in the mounting plate 5. 52 is arranged so that the guide pin moves up and down along a guide groove 31 formed in one side wall 33 of the chassis 3. A support frame 8 for supporting the cassette holder 4 in a vertically movable manner has a rear end 81 rotatably supported on the chassis 3, and a front end 82 pivoted 83 on both side walls 42 of the cassette holder 4.
A coil spring 6 is stretched between the support frame 8 and the mounting plate 5 so as to rotate. Further, a stopper portion 53 is formed on the distal end side of the mounting plate 5 and projects upward, and this abuts against the top plate 32 of the chassis 3, thereby regulating the upper limit position of the cassette holder.

A guide roller 84 is arranged slightly forward of the rotational fulcrum 8a of the support frame 8, and a slider 9 is arranged on one side wall 33 of the chassis 3, and slides in the direction of arrow 9F by a drive source. A guide groove 19 having a bent step is formed in the slider, and the guide loader 8 is inserted into the guide groove 19.
4 is engaged. Therefore, when the slider 9 slides in one direction (forward direction) and reaches a predetermined position, the support frame 8 rotates downward about the rotational fulcrum 8a, and accordingly, the cassette holder 4 descends, and the slider The cassette holder 4 is configured to be raised by sliding the cassette 9 in the other direction (backward direction).

The lock pawl 10 is arranged on the side wall 33 of the chassis 3 near the guide groove 31, and the lock pawl 10 is rotatable about a fulcrum 10a. When the slider 9 moves forward, the lock pawl 10 is engaged with an engaging stepped portion 9a formed on the slider 9 and pushed back, thereby releasing the closed state. The torsion spring 11 is disposed on a spring arrangement protrusion 12, one end of which is engaged with a hook part 13, and the other end is engaged with a retaining pin 14 of a lock pawl 10, and then further extended. 11a projects between the side wall 33 of the chassis 3 and the slider 9. Further, an engagement pin 15 is provided protruding from the tip side of the slider 9, so that the tip of the torsion spring 11 is engaged when the slider slides in the other direction (backward direction). . In the figure, reference numeral 16 indicates a slide guide hole formed in the slider 9, and 17 indicates a slide guide hole formed in the chassis 3 so as to engage with the slide guide hole 16.
The slider 9 slides within the range of the slide guide hole 16.

6A to 6D show the operating process of the cassette holder locking device 1. As shown in A, when the slider 9 is in the fully advanced position, the lock pawl 10 is pressed by the engagement step 9a and locks into the guide groove. 31 is completely opened, and in this state the guide pin 52 is lowered. When the slider 9 moves back, the guide pin 52 is locked by the lock step of the lock pawl 10 as shown in C after passing through the state shown in B. When the slide 9 moves further backward, as shown in D, the engagement pin 15 pulls the tip 11a of the torsion spring 11, causing the torsion spring 11 to take on a dogleg shape, strengthening its elasticity and locking. The situation becomes stronger.

"Effects of the Invention" According to the cassette holder lock device in the loading mechanism according to the present invention, when the cassette holder is at the upper limit position, the lock pin protruding from the side surface is at the upper limit position of the guide groove formed in the chassis. Since the slider is locked by a locking pawl, the position can be held securely, and the locked state can be released when the slider starts sliding. Therefore, by sliding the slider, the cassette holder can be lowered and the cassette can be set in a predetermined position.

When ejecting, the slider slides in the opposite direction, causing the cassette holder to rise, and when the guide pin reaches the upper limit position of the guide groove, the guide pin is locked by the lock pawl, but the slider continues to slide further. This allows the biasing force of the torsion spring to be strengthened, thereby making the locking state by the locking pawl more reliable.

Therefore, even if the cassette holder lifting guide means is provided only on one side of the holder, the cassette holder can be reliably locked at its upper limit position. Therefore, the space on the opposite side of the chassis can be used as a space for arranging other mechanisms, such as a lid opening/closing mechanism, which is advantageous in reducing the size of the device.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the cassette holder locking device in the loading mechanism according to the present invention, and FIG. 1 is a perspective view of the cassette holder;
Figure 2 is a plan view showing the support mechanism of the cassette holder, Figure 3 is a perspective view of the main parts of the same, Figure 4 is a perspective view of the main parts of the cassette holder locking device, and Figure 5 is a perspective view of the main parts of the cassette holder locking device.
The figure is a right side view of the main chassis, Figures 6A to D
FIG. 2 is a side view of the main parts showing the operation process. 1... Entire cassette holder locking device, 3...
... Chassis, 4 ... Cassette holder, 9 ... Slider, 10 ... Lock claw, 11 ... Torsion spring,
11a... Spring tip, 15... Engagement pin, 31...
...Guide groove, 52...Guide pin.

Claims (1)

[Claims for Utility Model Registration] A cassette inserted from a loading slot is gripped and housed in a cassette holder arranged to move up and down by the sliding action of a slider, and as the holder descends, the cassette is held in a predetermined position. In the loading mechanism of a tape recorder, which is configured to set the cassette in a position, a guide groove is formed on the chassis to guide a guide pin protruding from the side of the cassette holder, and a torsion spring is arranged so as to be rotatable. Therefore, the lock pawl is biased to always close the guide groove, and is released from the closed state by sliding the slider, and by sliding the slider in the opposite direction. A cassette holder lock device comprising an engagement pin protruding from a slider so as to be engaged with a tip of a torsion spring.