JPH11242842A - Cassette lid opening and closing mechanism of recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cassette lid opening and closing mechanism of the recording and reproducing device which permits lock operation permanently giving a good feeling by guiding a cassette lid to a normal closure position by adding a simple function. SOLUTION: Of the cassette lid opening and closing mechanism of the recording and reproducing device which has the cassette lid 2 opened and closed on a main body cabinet 1 by a rotational fulcrum part and locked at its closure position by a lock mechanism, a frame 10 on the opening end side of the cassette lid 2 opposite from the rotational fulcrum part is provided with guide-in pieces 20 and 20 having guide grooves 21, and a guide pin 23 in which the guide groove is guided in the closing operation of the cassette lid 2 is provided on the side of the main body cabinet 1. Further, position restriction arms 43 and 43 are provided at both side parts of the cassette lid 2 and the position restriction arms 43 and 43 are guided to the internal wall surface 1a of the main body cabinet 1 through the opening/closing operation of the cassette lid 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette lid opening / closing mechanism suitable for use in a recording / reproducing apparatus such as a video camera apparatus. More specifically, the present invention relates to a cassette lid closing operation by providing an access mechanism to the cassette lid. In this embodiment, a lock function with a good touch can be obtained permanently.

[0002]

2. Description of the Related Art Conventionally, a video camera apparatus is provided with a cassette lid for taking a tape cassette in and out. The cassette lid can be opened and closed by a hinge mechanism with respect to the main body of the video camera device, and is fixed by a lock mechanism in a closed state. As a general configuration of the lock mechanism, a pair of lock claws is provided on the cassette lid side, and a lock pin that engages with the lock claw is provided on the main body side. Describing in more detail, a lock claw on the cassette lid side is formed on a slider member, and is slidable in a retracting direction by a slide operation of a knob,
A spring is biased in the locking direction.

In the general locking operation of the above-described conventional locking mechanism, the cassette lid is closed and the locking pin comes into contact with the locking pin. The lock claw is pulled back by the force and engages with the lock pin to enter a locked state.

In the above-mentioned locking operation, the locking claw and the locking pin are rubbed against each other, and as a result, both members are worn, so that a locking operation with a good touch cannot be obtained permanently. Therefore, as a countermeasure for solving the above-described inconvenience, a lock mechanism that enables a lock operation without a lock claw contacting a lock pin in a lock operation has been proposed.

[0005]

However, despite the improved lock mechanism, the cassette lid can only be opened and closed using the hinge mechanism as a pivot point. In the case where the lock claw and the lock pin are closed in a state in which an external force is applied from the direction, the lock claw and the lock pin are displaced from each other, so that the lock claw and the lock pin come into contact with each other and as described above, both members are worn. It is not a reliable locking mechanism because there is a problem that it is impossible to obtain a good tactile lock operation permanently, or there is a problem that the positional relationship between the lock claw and the lock pin becomes so large that the lock function becomes impossible. Was.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and is directed to a case where the cassette lid is closed by applying an external force from a lateral direction by adding a simple function. Another object of the present invention is to provide a cassette lid opening / closing mechanism of a recording / reproducing apparatus in which a cassette lid is guided to a normal closed position to enable a lock operation with a good touch permanently.

[0007]

In order to achieve the above-mentioned object, a cassette lid opening / closing mechanism of a recording / reproducing apparatus according to the present invention is arranged such that the cassette lid is positioned so as to face a lock mechanism when the cassette lid is closed. It is provided with a calling mechanism.

[0008] With this configuration, even when the cassette lid is closed in a state where an external force is applied from the lateral direction, for example, the call-in mechanism such as the call-in guide groove and the guide pin are engaged. The cassette lid is guided to the normal closing position, and the locking operation with a good touch can be performed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a cassette lid opening / closing mechanism of a recording / reproducing apparatus according to the present invention will be described with reference to the drawings, taking an example in which the embodiment is applied to a cassette lid opening / closing mechanism of a video camera apparatus.

FIG. 1 is an external perspective view of a video camera device, FIG. 2 is a perspective view of a cassette lid opening / closing mechanism in a separated state, FIG. 3 is an operation diagram of the cassette lid opening / closing mechanism in a cassette lid opening position, and FIG. Operation diagram immediately before lock operation, FIG. 5
FIG. 7 is an operation diagram of a locking operation of a cassette lid.

First, an outline of a video camera device will be described with reference to FIG. A cassette lid 2 for inserting and removing a tape cassette (not shown) is provided on one side surface of a main body cabinet 1 which is a main body of the video camera apparatus so that a cassette insertion slot 1a can be opened and closed by rotating means to be described later. The knob 3 can be released by sliding the knob. In addition, the cassette cover 4 of the cassette compartment (hereinafter, referred to as cassette cassette), which is a cassette loading device, located at the eject position in the main body cabinet 1 can be seen from the cassette lid 2 in the opened state. The tape cassette is removed.

The main body cabinet 1 has a photographing lens 5, a sound collecting microphone 6, a switching knob 7 for standard / telephoto photographing,
A shooting start button 8, a grip belt 9, and the like are provided.

Next, an example of the configuration of the cassette lid opening / closing mechanism according to the present invention will be described. On the back surface of the cassette lid 2, a frame 10 made of a metal frame in this example is provided with a plurality of screws 1.
1, 11 fixed. For example, bearing pieces 12, 12 are formed on both sides of the lower end of the frame 10 as rotating means, and the bearing pieces 12, 12 are used as bearings 13, 13 on the main body cabinet 1 side (only the bearing 13 on one side in FIG. 2). (Shown) is rotatably supported by a shaft (not shown). One bearing piece 12 is integrally formed with an arc-shaped tooth portion 14, and the tooth portion 14 is attached to a side plate 15 of the main body cabinet 1.
Gear 16 of an oil damper (not shown) attached to
To be engaged.

A coil spring 17 for urging the cassette lid 2 in the opening direction is attached to the frame 10. One end 17a of the coil spring 17 is supported by a spring hook 12a extending from one bearing piece 12, and the other end 17b is supported by a spring hook 1b on the main body cabinet 1 side. That is, with the operation of opening the cassette lid 2 together with the frame 10 by the spring force of the coil spring 17, a damper action is generated on the oil damper via the gear 16, and the cassette lid 2 can be decelerated and opened. ing.

Next, the lock mechanism of the cassette lid opening / closing mechanism will be described with reference to FIG. 2 in a separated state and FIG. 3 in an assembled state.

Reference numeral 18 denotes the entire lock mechanism. A pair of lock claws 19 is formed on the left and right sides of the upper end of the frame 10 to which the cassette lid 2 is fixed.
An access mechanism for the cassette lid 2 is provided at an intermediate portion between 9 and 19. In this example, in this example, a guide groove 21 is formed between a pair of parallel call-in guide pieces 20, 20, and a call-in slope 2 is formed at the tip of the call-in guide pieces 20, 20.
0a and 20a.

On the other hand, a base plate 22 is fixed to the upper back surface of the cassette insertion slot 1a of the main body cabinet 1. A guide pin 23 is provided on the base plate 22 at a position corresponding to the guide groove 21 of the above-described call-in mechanism. The call-in guide mechanism 20 having the guide groove 21 and the guide pin 23 constitute a call-in mechanism according to the present invention. You.

On the base plate 22, a slider 24 is provided with shaft pins 26, 2 through a pair of long holes 25, 25 formed therein.
6 is fixed to the base plate 22 by caulking and attached so as to be slidable in the left-right direction.

The slider 24 has projecting pieces 24a, 24
A pair of lock pins 27, 27 are vertically attached to a, and both lock pins 27, 27 are disengaged from the above-mentioned lock claws 19, 19 on the cassette lid 2 side.

On the slider 24, a slider locking member 28 is provided with a fulcrum shaft 29 attached to a fulcrum portion 28a of the slider 24 through a long hole 30 formed in the slider 24.
2 is fixed by caulking. Thus, the slider lock member 28 is rotatable about the fulcrum shaft 29, and the length range of the long axis hole 30 along the fulcrum shaft 29
Is made movable.

The slider lock member 28 includes a hook 31
And a hook hole 3 formed in the slider 24 with the hook piece 31.
Through 2, it is further engaged with a slot 33 formed in the base plate 22. The slider lock member 28 is provided with an operation piece 34 that comes into contact with the frame 10 of the cassette lid 2 described above. In the slider lock member 28 thus configured, one end of the coil spring 35 is supported by the spring hook piece 28b, and the other end of the coil spring 35 is supported by the spring hook piece 24b of the slider 24. The opening 36 formed in the base plate 22 is a hole through which the coil spring 35 escapes so as not to come into contact with the coil spring 35.

Here, the knob 3 for opening the cassette lid 2 is arranged in the concave portion 37 of the main body cabinet 1, and a moving member 38 that slides integrally with the knob 3 is provided on the back side of the main body cabinet 1. . Moving member 3
8 has an engagement piece 39 on one end side, and this engagement piece 39 interferes with the hook 40 formed at the end of the slider 24 described above. The moving member 38 is urged by the spring member 41 to the retracted position. Further, a first switch 42 is arranged at a position facing the moving member 38.
The knob 3 is slidable while pressing the release pin 3a.

The frame 10 of the cassette lid 2 which is opened by the sliding operation of the knob 3 has position regulating arms 43 for preventing the cassette lid 2 from shifting sideways.
Is provided. The position regulating arms 43, 43 are always in the cassette insertion slot 1a in the open / close position of the cassette lid 2.
It is made to overlap with the inner wall surface. Further, the main body cabinet 1 is provided with a second switch 44 for operating the cassette to the eject position in conjunction with the opening of the cassette lid 2. The second switch 44 is the first switch 4 described above.
A standby state is established by the pulse signal from the second device, and the provision of these two switches 42 and 44 constitutes an erroneous operation prevention mechanism of the video camera device.

Next, the cassette lid 2 constructed as described above is used.
3 to 3 show the operation of the call-in mechanism together with the closing operation of the opening / closing mechanism.
Referring to FIG.

FIG. 3 is an operation view of the cassette lid 2 in an open state when the opening / closing mechanism is viewed from the inner side. In this state, the slider 24 has been retracted to the unlocking position with the lock pins 27, 27, and the slider lock member has been moved. 28 is rotated by receiving the pulling force of the coil spring 35 at the position where the hook 31 is engaged with the step 32a of the hook hole 32, whereby the slider 24 is locked in the release position. The spring is biased in the locking direction by the spring.

First, after the cassette cover 4 (see FIG. 1) is closed, when the frame 10 is closed together with the cassette cover 2 from the position shown in FIG. When the cassette lid 2 starts to be engaged with the guide pin 23, the cassette lid 2 is brought into the normal closed position. Here, in the closing operation of the cassette lid 2, even if the cassette lid 2 is closed due to an external force generated from the side, the guide groove 21 is called into the guide pin 23 by the guide slope 20 a, and the cassette lid 2 is closed. 2 can be guided to the normal closed position.

FIG. 4 shows the operation state immediately before the cassette lid 2 is locked. At this time, the lock claws 19, 1 on the cassette lid 2 side are used.
9 and lock pins 27 and 2 on the main body cabinet 1 side.
7 does not come into contact with each other since they are retracted.

Thus, when the cassette lid 2 is completely closed from the operating position shown in FIG. 4, the operating piece 34 of the slider lock member 28 is pushed by the frame 10 so that the slider lock member 28 has the fulcrum shaft 29 as a fulcrum. To rotate clockwise. As a result, the slider lock member 28 is in a state where the hook piece 31 is detached from the step portion 32a of the hook hole 32, so that the slider 24 becomes free, and the slider 24 receives the pulling force of the coil spring 35 to receive the slider 24.
At the same time, the lock pins 27, 27 slide in the locking direction, and the lock pins 27, 27 are engaged with the lock claws 19, 19 as shown in FIG.

Further, since the position regulating arms 43 provided on the frame 10 of the cassette lid 2 are in contact with the inner wall surface of the cassette insertion slot 1a of the main body cabinet 1, external force is applied to the cassette lid 2 from the side. Even when the cassette lid is closed, the cassette lid 2 is guarded by the position regulating arms 43, 43, and can be closed while maintaining the normal posture.

Next, the opening operation of the cassette lid 2 will be described. When the knob 3 (see FIG. 2) is slid in the unlocking direction from the state where the cassette lid 2 is locked at the closed position as shown in FIG. The slider 24 is pulled and slid in the release direction via the hook portion 40 facing the same. The movement of the slider 24 causes the lock claws 19,
With the operation of releasing the lock pins 27 from 27, the frame 10 is opened together with the cassette lid 2 by the spring force of the coil spring 17. As the cassette lid 2 is opened, the guide groove 21 serving as a mechanism for loading the cassette lid comes out of the guide pin 23.

Further, with the releasing operation of the slider 24, the slider lock member 28 rotates counterclockwise by the spring force of the coil spring 35, and the hook 31 is engaged with the step 32a of the hook hole 32. Thus, the slider 24 is locked at the release position (see FIG. 3).

As described above, in the cassette lid opening / closing mechanism according to the present invention, since the cassette lid 2 is provided with the call-in mechanism, the cassette lid 2 can be called at a position facing the lock mechanism in the closing operation of the cassette lid 2. Therefore, the lock claw 19 and the lock pin 27
The lock operation can be performed with a good touch permanently without interference during the lock operation.

Next, the first and second switches 42 and 44
Will be described. When the cassette lid opening / closing mechanism is in a normal operation state, by sliding the knob 3 from a state where the cassette lid 2 is locked at the closed position, the lock mechanism is released and the cassette lid 2 is opened. However, when the knob 3 is slid, the first switch 42 is turned on, and the pulse signal from the first switch 42 is supplied to the second switch 44 via the microcomputer.
Becomes the standby state. Thereafter, when the opening operation of the cassette lid 2 is started, the second switch 44 is interlocked therewith.
Is turned on, the cassette cover 4 is opened together with the eject operation of the cassette, and the tape cassette can be taken out from the cassette or loaded into the cassette.

By providing these two switches 42 and 44, an erroneous operation preventing function can be obtained. An example of this erroneous operation prevention function will be described. In the operation of opening the cassette lid 2, when the user operates the knob 3 while pressing the cassette lid 2 in the closed state by mistake, the first switch 42 is turned on. Even if the second switch 44 is set to the standby state via the microcomputer by the pulse signal, the second switch 44 remains in the off state due to the closing of the cassette lid 2, so that the cassette switch is turned on by the first switch 42. For example, the cassette controller that has been in the shooting standby state without being operated does not start the eject operation even if it is operated, and can keep the shooting standby state as it is, thereby preventing unnecessary operation or malfunction of the cassette controller.

Next, another example of the erroneous operation prevention function will be described.
After the cassette is loaded into the cassette and the cassette cover 4 is closed from the state where the cassette is open, when the user wants to exchange the tape cassette, the knob 3 is slid and the first switch 42 is operated to operate the first switch 42. Switch 42 is turned on. Therefore, the second switch 44 is put on standby by the pulse signal from the first switch 42, but since the cassette lid 2 is opened and the second switch 44 is turned on, the second switch 44 is turned on. Causes the cassette to move to the eject position, the cassette cover 4 is opened, and the tape cassette can be taken out.

As described above, the first switch 42 which is turned on in conjunction with the slide operation of the knob 3 and the cassette lid 2 which is on standby by the signal from the first switch 42
Switch 44 that turns on in conjunction with the opening operation of
With this arrangement, the above-described function for preventing erroneous operation can be obtained, and a highly reliable cassette lid opening / closing mechanism can be obtained.

The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.

The loading mechanism of the cassette lid 2 is not limited to the configuration shown in the present embodiment, but is provided with loading guide pieces 20 having guide grooves 21 on the main body cabinet 1 side.
Even if the guide pins 23 are provided on the cassette lid 2 side, the same operation as in the above case can be obtained.

The loading mechanism may have another configuration as long as the cassette lid 2 that opens and closes can be loaded directly into the locking mechanism.

Although the opening / closing mechanism according to the present invention has been described as being applied to a cassette lid opening / closing mechanism of a video camera apparatus, it can be widely applied to a cassette lid opening / closing mechanism of a recording / reproducing apparatus such as audio equipment. is there.

[0041]

As described above, the cassette lid opening / closing mechanism of the recording / reproducing apparatus according to the present invention has a call-in mechanism for positioning the cassette lid directly against the lock mechanism in the closing operation of the cassette lid. As a result, the cassette lid is guided to the normal closing position by the call-in mechanism, and a lock operation with a good touch can be performed permanently.

According to a second aspect of the present invention, the loading mechanism has an engagement structure of a loading guide groove provided on an open end side of the cassette lid opposite to the rotating means and the apparatus main body side with a guide pin. In addition, the cassette lid can be reliably operated by a simple configuration.

According to the third aspect of the present invention, since the cassette lid is provided with a position regulating arm for preventing lateral displacement with respect to the apparatus main body, the cassette lid is closed by applying an external force from the side. However, it is possible to guide the cassette lid to the pull-in mechanism without laterally displacing, thereby enabling the cassette lid to be reliably closed.

Further, the first switch which is turned on in conjunction with the operation of the release knob, the standby operation is performed by a signal from the first switch, and the cassette is opened in conjunction with the opening operation of the cassette lid. By providing the second switch for ejecting the loading device, when the cassette lid is opened while the cassette lid is held down, the cassette console is held in the current operating state to prevent malfunction. Alternatively, the cassette cover once closed can be easily opened even in the middle of a series of procedures, resulting in a highly reliable cassette cover opening / closing mechanism.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a video camera device provided with a cassette lid opening / closing mechanism according to the present invention.

FIG. 2 is a perspective view of the cassette lid opening / closing mechanism according to the present invention in a separated state.

FIG. 3 is an operation diagram of an opening / closing mechanism when a cassette lid is opened.

FIG. 4 is an operation diagram of the opening / closing mechanism immediately before the closing lock operation of the cassette lid.

FIG. 5 is an operation diagram of the opening / closing mechanism in a state where the cassette lid is closed and locked;

[Explanation of symbols]

1 body cabinet, 2 cassette lids, 3 knobs,
4 Case cover, 10 frame, 12 Bearing piece, 13
Bearing, 18 cassette lid opening / closing mechanism, 19 lock pawl, 2
0 Call-in guide piece, 21 guide groove, 22 base plate, 23 guide pin, 24 slider, 27 lock pin, 28 slider lock member, 38 moving member, 4
2 First switch, 43 Position regulating arm, 44 Second switch

Claims (4)

[Claims] 1. A cassette lid is made openable and closable by a rotating means in an apparatus main body, locked in a closed position by a lock mechanism, and the lock mechanism is released by operating a release knob to open the cassette lid. In the cassette lid opening / closing mechanism of the recording / reproducing apparatus as described above, the recording / reproducing apparatus is provided with a calling mechanism in which the cassette lid is positioned to face the lock mechanism in the closing operation of the cassette lid. Lid opening and closing mechanism. 2. The cassette lid opening and closing mechanism according to claim 1, wherein the loading mechanism is provided on an opening end side of the cassette lid opposite to the rotating means of the cassette lid and on the apparatus main body side. A cassette lid opening / closing mechanism for a recording / reproducing apparatus, which has an engagement structure of a guide groove and a guide pin. 3. The recording / reproducing apparatus according to claim 1, wherein said cassette lid is provided with a position regulating arm for preventing lateral displacement of said cassette lid with respect to said apparatus main body. Cassette lid opening and closing mechanism of the playback device. 4. A cassette lid opening / closing mechanism for a recording / reproducing apparatus according to claim 1, further comprising: a first switch that is turned on in conjunction with an operation of said release knob, wherein said first switch is turned on by a signal from said first switch. And a second switch for ejecting the cassette loading device in conjunction with the opening operation of the cassette lid.