JPH08198293A - Lock device of lid - Google Patents

Abstract

PURPOSE: To certainly lock a lid while opening the lid by weak force. CONSTITUTION: Two outwardly turned pawls 21b, 22b are energized by a tensile spring 37 to lock the projection parts 30b, 30b of a lid 16. When a slide switch 26 is moved to the right from this state, the pawls 21b, 22b are detached and the opening of the lid becomes possible. Since a lever 25 is rotated by opening the lid and an engaging groove 25 is engaged with an engaging part, the pawls 21b, 22b are held to an open state. When the lid 16 is closed, the lever 25 is pressed downwardly by the projection part 30b and the engaging groove 25b is detached from the engaging part 34 and the pawls 21b, 22b lock the projection parts 30b, 30b. Since the pawls 21b, 22b are turned outwardly, certain lock becomes possible. Since the operation of lock parts 21, 22 is performed at the closing time of the lid by pressing the lever 25, the lid 16 can be locked by weak force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid lock device suitable for use in a cassette tape recorder or the like.

[0002]

2. Description of the Related Art An audio device such as a portable cassette tape recorder is provided with a lid 16 for preventing a recording medium such as a cassette tape from falling out of a housing chamber 14 as shown in FIGS. There is. Generally, the lid 16 can be opened and closed by connecting a rear end portion thereof to a rear cabinet 13 of the device or the like with a hinge 50. Further, in order to prevent the lid 16 once closed from being opened accidentally, the locking claws 4 provided in the rear cabinet 13 or the like.
1 and a lock device 40 including a lock piece 42 provided on the lid 16 are often provided.

As shown in FIG. 5, such a locking device 40 has a type in which only one side of the lid 16 is locked. However, in this type, if the lid 16 is pulled or the lid 16 is distorted, the unlocked one may float. Also, as shown in FIG. 6, there is also a type in which the locking device 40 is provided in the center of the lid 16, but even if this type is better than the above type, it still floats when a large force is applied to the corner of the lid 16. There is a risk that

In order to solve such a problem, as shown in FIG. 7, two locking claws 41 oriented in the same direction are integrated with a slider 43, and the claws 41 of the lid 16 move as the slider 43 reciprocates. A type in which the lock piece 42 is hooked and released is used.

In these locking devices 40, the locking claw 41 is biased by a spring or the like, and generally returns to its original position after the lid 16 is opened. Therefore, the inclined portion 44 is provided on the upper portion of the locking claw 41, and when the user closes the lid 16, the lock piece 42 is guided by the inclined portion 44 and hooked on the locking claw 41.

[0006]

However, in any of the above embodiments, when a force is applied in the direction of the arrow in the figure,
There is a risk that the lid 16 may be laterally displaced and opened carelessly. For example, in the lock device 40 of the type in which the two locking claws 41 shown in FIG. 7 are integrated, even if there are a plurality of locking claws 41, they are facing in the same direction, so the lid 16
There is a case where the lock piece 42 provided on the lid 16 is disengaged from the locking claw 41 due to the lateral displacement in one direction, and the lid 16 is opened carelessly.

[0007] To ensure that the lid 16 is locked,
It is effective to strengthen the biasing force applied to the locking claw 41. However, since the lock piece 42 is hooked on the locking claw 41 by the pressing force itself when the user closes the lid 16, a stronger force is required when closing the lid as the biasing force of the locking claw 41 is increased. Therefore, there is a problem that the lid 16 is difficult to close and the handling is troublesome.

Further, in the lock device of FIG. 7, when the lid 16 is tilted or the lid 16 is deformed due to a dimensional error of parts, the lid 16 cannot be brought into close contact with the rear cabinet 13 and a gap is generated. There was a problem.

Therefore, the present invention has been made to solve the above-mentioned problems, and provides a locking device capable of securely locking the lid to prevent accidental opening of the lid and closing the lid with a weak force. With the goal.

[0010]

In order to solve the above-mentioned problems, in the present invention, in a locking device for locking the lid of a storage body when the lid is closed, a pair of movable members facing different directions from each other. Locking means, a synchronizing means for synchronizing the operation of the pair of locking means, a biasing means for biasing the synchronizing means, and holding and releasing the open state of the pair of locking means when the lid is opened. And a holding release means for doing so.

[0011]

As shown in FIG. 2, in the lock device 20, two claws 21b and 22b facing in mutually opposite directions are urged by the tension spring 37 and the receiving member 30 provided on the lid 16 is provided.
The protrusions 30b and 30b of 30 are locked. When the slide switch 26 is moved to the right from this locked state, the slider 24 is moved to the right as shown in FIG. 3, the left lock portion 21 is rotated clockwise, and the right side is rotated. The lock portion 22 of rotates in the counterclockwise direction. Accordingly, the claws 21b and 22b are synchronized with each other and the projection 3
The lid 16 can be pushed up in the direction indicated by the arrow B to open it, after being disengaged from 0b and 30b. When the lid 16 is opened upward, the left protrusion 30b is moved to the upper end 25a of the lever 25.
Move away from At this time, the lever 25 is rotated clockwise by the biasing force of the torsion spring 39 in the clockwise direction, and the locking groove 25b and the locking portion 34 are locked, so that the left and right locking portions 21 and 22 are in the open state. Retained.

On the other hand, when the lid 16 is closed as shown in FIG. 4, the left protrusion 30b pushes the lever 25 downward. As a result, the lever 25 rotates counterclockwise as shown in FIG. 2, and the locking portion 34 disengages from the locking groove 25b. At this time, the slider 24 is moved leftward by the urging force of the tension spring 37, and the left lock portion 21 rotates counterclockwise and the right lock portion 22 rotates clockwise. Then, the claws 21 are formed on the upper surfaces of the protrusions 30b and 30b.
b and 22b contact and lock the lid 16.

In this way, the lid 16 is securely locked by the claws 21b and 22b facing in the opposite directions,
Careless opening of the lid is prevented. Also, the lock parts 21, 22
A lever 25 for holding and releasing the open state of the lock lever is separately provided separately.
It suffices that a relatively weak biasing force that allows the locking portion 34 to be locked by 5b be applied. Therefore, since the lever 25 rotates counterclockwise with a weak force when the lid is closed, the lid 16 can be locked with a weak force.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of a lid locking device according to the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the structure of a portable cassette tape recorder 10 to which the lock device according to the present invention is applied.
The cassette tape recorder 10 is a so-called headphone stereo capable of reading recorded information on a cassette tape and listening to the information with headphones (not shown). The cassette tape is used in the rear cabinet 13 which is a housing body of the cassette tape recorder 10.
It is housed in a housing chamber 14 formed inside. Containment room 1
In 4, the reproducing process and the winding process of the cassette tape are performed.

A lid 16 for opening and closing the accommodation chamber 14 is attached to the rear cabinet 13. The lid 16 is in the shape of a rectangular plate, and a window 17 made of a transparent material is provided in the center of the lid 16 for checking the status of the cassette tape. The rear end portion 16a of the lid 16 is the rear cabinet 13
The lid 16 can be opened and closed by pivoting up and down around the hinge 50 as shown by an arrow A in the figure.

The locking device 20 according to the present invention is arranged inside the front end 13b of the rear cabinet 13 in order to lock the front end 16b of the lid 16. The locking device 20 locks the front end portion 16b of the lid 16 in order to prevent the lid 16 from being opened accidentally when the lid 16 is closed.

FIG. 2 shows the structure of the lock device 20 as seen from the direction of arrow Z in FIG. The lock device 20 is provided on a rectangular plate-shaped chassis 12 fixed inside the rear cabinet 13. The lock device 20 includes a pair of lock portions 21 and 22 which are lock means for locking the lid 16.
And a slider 24 which is a synchronizing means for interlocking the lock portions 21 and 22, and a lever 25 which is a holding release means for holding and releasing the open state of the lock portions 21 and 22. The figure shows a state in which the lid 16 is locked by the lock portions 21 and 22 of the lock device 20.

Each of the lock portions 21 and 22 shown in FIG. 2 has a pair of claws 21b and 2 protruding laterally from the upper portion thereof at an acute angle.
2b makes contact with the projections 30b, 30b formed on the receiving members 30, 30 of the lid 16. Further, these claws 21b and 22b are formed so as to face in mutually opposite directions and have a substantially left-right symmetrical shape with the slide switch 26 as the center. The receiving member 30 is integrally formed with a thin plate-shaped fixing portion 30a fixed to the lid 16 and a protruding portion 30b with which the claws 21b and 22b abut. The protruding portion 30b protrudes inward from the fixed portion 30a and is formed to be substantially horizontal when the lid 16 is closed.

The central portions of the lock portions 21 and 22 are rotatably attached to the central shafts 21a and 22a fixed to the chassis 12. That is, the claws 21b and 22b are moved to the projections 30b and 30b of the lid 16 by rotating the lock parts 21 and 22 at the locking position to the open position, respectively.
It becomes possible to remove from. Since the claws 21b and 22b face in mutually opposite directions, inadvertent opening of the lid 16 can be prevented and the lid 16 can be reliably locked even if a force is applied to the lid 16 in either the left or right direction.

A pin 31 is fixed to the upper side of the rotary shaft 21a of the left lock portion 21, and the left end of the slider 24 is rotatably attached to the pin 31. The chassis 12 is provided with an arcuate notch 12a so as not to interfere with the movement trajectory of the pin 31 accompanying the rotation of the lock portion 21. A locking portion 34 for engaging a lever 25, which will be described later, is provided at the lower right portion of the lock portion 21.

An arcuate elongated hole 32 is provided in the chassis 12 located below the rotary shaft 22a of the right lock portion 22, and a pin 33 rotatably attached to the right end portion of the slider 24 is provided in this elongated hole 32. Has been inserted. Long hole 32
Since there is a play S between the pin 33 and the pin 33, the movement locus of the pin 33 due to the rotation of the lock portion 21 is not interfered with as described above. Further, two stoppers 35a and 35b are provided on the lower right portion of the lock portion 22.
During the rotation of the lock parts 21 and 22, the stopper 35
By making the a and 35b contact the support plate 36 protruding from the chassis 12, it is possible to restrict the rotation of the claws 21b and 22b from being excessive. The lid 16
The upper stopper 35a is in contact with the support plate 36 in the locked state.

The thin plate-shaped slider 24 is provided with a plurality of refraction portions, and is formed so that the left end is higher than the right end. The slider 24 is arranged in the left-right direction of the rear cabinet 13, and a slide switch 26 is fixed to the substantially central portion thereof. As shown in FIG. 1, the slide switch 26 is exposed on the outer surface of the front end portion 13b of the rear cabinet 13 so that it can be operated from the outside. A guide groove 27 is formed here,
The slide switch 26 is slidable right and left along the guide groove 27.

Further, a protrusion 24a protruding above the center of the slider 24 and a hooking portion 12b provided on the chassis.
The tension spring 37 is locked to the slider 24, and the slider 24 is always given a biasing force F to the left. Slider 24
The left end portion of the lock portion 21 is attached to the upper side of the rotary shaft 21a of the lock portion 21 on the left side.
1 is always biased counterclockwise. Also, slider 2
Since the right end portion of 4 is attached to the lower side of the rotary shaft 22a of the right lock portion 22, the lock portion 22 is always urged clockwise by the urging force F. That is, in the locked state, the urging force F of the tension spring 37 causes the claws 21b and 22b of the lock portions 21 and 22 to move the protrusions 30b and 30b.
The slide switch 26 is located at the left end of the guide groove 27.

By being urged by the tension spring 37, the claws 21b and 22b not only come into contact with the protrusions 30b and 30b, but also constantly push down the protrusions 30b and 30b. Therefore, the lid 16 due to the dimensional error of the parts
Even if the lid 16 tilts or the lid 16 is deformed, the lid 16 can be closely attached to the rear cabinet 13. Also,
Since both the claws 21b and 22b are biased by the single tension spring 37, the left and right claws 21b and 22b are uniformly biased, so that the rattling of the lid 16 is prevented.

The lever 25 is formed in an L-shape that wraps around the lower side and the left side of the left lock portion 21, and is rotatably attached to the chassis 12 by a rotary shaft 38 at the lower right end. A coil-shaped torsion spring 39 is wound around the rotary shaft 38, an upper end portion of the torsion spring 39 is hooked on the lever 25 main body, and a lower end portion is hooked on the chassis 12. The lever 25 is always urged clockwise by the urging force G of the torsion spring 39, but is regulated by the upper end 25a of the lever 25 coming into contact with the lower surface of the protrusion 30b of the receiver 30. Also, the lock part 2
A locking groove 25b for locking the first locking portion 34 is recessed in the lever 25.

Next, a method of opening the lid 16 by the lock device 20 will be described. From the locked state in which the lid 16 shown in FIG. 2 is locked, the slider 24 is moved to the right as shown in FIG. 3 by moving the slide switch 26 to the right against the urging force F of the tension spring 37. The lock portion 21 on the left side rotates clockwise around the rotation shaft 21a. Further, the slider 24 moves to the right, and the right lock portion 22 rotates counterclockwise about the rotation shaft 22a. As a result, the lock parts 21, 22
The claws 21b and 22b of the cover 16 rotate synchronously to the open position, and come off from the protrusions 30b and 30b of the lid 16. Note that the stopper 35a of the lock portion 22 contacts the support plate 36, so that the rotation of the lock portions 21 and 22 is regulated so as not to be excessive.

When the protrusion 30b is no longer regulated, the lever 25 is rotated clockwise by the urging force of the torsion spring 39, and the upper end 25a of the lever 25 pushes the left protrusion 30b upward. In this way, the lid 16 is urged upward and pushed up, so that the cassette tape can be taken out easily. At this time, the lock part 2
The rotation of 1 causes the locking portion 34 to face substantially downward, and the rotation of the lever 25 locks the locking groove 25b and the locking portion 34 of the lock portion 21. Lock part 21
Always tries to rotate counterclockwise by the urging force F of the tension spring 37, but since the locking portion 34 is locked in the locking groove 25b, the claw 21b of the left lock portion 21 is opened, That is, it is held in the open state. Further, when the left lock portion 21 is held at the predetermined position, the slider 24 is also held at the same position, so that the claw 22b of the right lock portion 22 is also held in the open state. in this way,
When the lid 16 is opened, the lock portions 21 and 22 are both held in an open state.

Although not shown, if a torsion spring, a leaf spring, or the like is arranged near the hinge 50 and the lid is biased in the opening direction, the biasing force of the torsion spring 39 causes the lever 25 to rotate slightly. Therefore, it is possible to set a very weak biasing force.

Further, the process of closing the lid 16 will be described with reference to FIG. When the lid 16 is pushed down in the direction indicated by the arrow C, the protrusion 30 b of the lid 16 is moved to the upper end portion 2 of the lever 25.
5a is abutted against the biasing force G of the torsion spring 39 and pressed downward. As a result, the lever 25 rotates counterclockwise, and the locking groove 25b is disengaged from the locking portion 34 of the lock portion 21. As the restriction of the locking groove 25a is removed, the slider 24 is moved leftward by the urging force F of the tension spring 37, the lock portion 21 is rotated counterclockwise, and the lock portion 22 synchronized therewith is rotated clockwise. Rotate. Then, as shown in FIG. 2, the claws 21b and 22b are formed on the upper surfaces of the protrusions 30b and 30b of the lid 16 that are pushed down.
Abut and are locked.

In this lock device 20, the pawl 21 is opened when the lid is opened.
b and 22b are held in the open state, and the release from the open state is performed by pressing the lever 25. Since the pressing force against the lever 25 required for closing the lid is determined by the biasing force G of the torsion spring 39, it can be appropriately set in consideration of the feeling of use and the like. That is, if the biasing force F of the tension spring 37 is set strong and the biasing force G of the torsion spring 39 is set weaker than this, it is possible to close the lid 16 with a weak force and securely lock it. become.

In the above embodiment, the lever 25
Although the means for urging the coil is the torsion spring 39, it may be a coil spring and is not limited to the embodiment.

[0033]

As described above, according to the present invention, in a lock device for locking a lid of a storage body when the lid is closed, a pair of movable locking means facing different directions and a pair of locks. A synchronizing means for synchronously performing the operation of the means, a biasing means for biasing the synchronizing means, and a holding release means for holding and releasing the open state of the pair of locking means when the lid is opened. It was prepared.

Therefore, according to the present invention, since the lids are reliably locked by the locking means facing different directions, careless opening of the lids is prevented. Further, the holding release means for holding and releasing the opened state of the locking means is provided independently, and since this holding release means only needs to be given a weak biasing force to hold the locking means, the lid is locked with a weak force. It is possible to do so.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of a cassette tape recorder 10 to which a lock device 20 according to the present invention is applied.

FIG. 2 is a front view showing a configuration of a lock device 20.

FIG. 3 is a front view illustrating a state in which a lid 16 is unlocked.

FIG. 4 is a front view illustrating a state in which the lid 16 is being closed.

FIG. 5 is a perspective view showing a first example of a conventional locking device.

FIG. 6 is a perspective view showing a second example of a conventional locking device.

FIG. 7 is a perspective view showing a third example of a conventional locking device.

[Explanation of symbols]

 10 Cassette Tape Recorder 13 Rear Cabinet 16 Lid 20,40 Lock Device 21,22 Lock Part 21b, 22b Claw 24 Slider 25 Lever 25b Locking Groove 30 Receiver 30b Projection 34 Locking Part 37 Pulling Spring 39 Torsion Spring

Claims (2)

[Claims] 1. A locking device for locking a lid of a storage body when the lid is closed, wherein a pair of movable locking means facing different directions and the pair of locking means operate in synchronization with each other. A synchronization means for performing the operation, a biasing means for biasing the synchronization means, and a holding release means for holding and releasing the opened state of the pair of locking means when the lid is opened. A characteristic locking device. 2. The lock device according to claim 1, wherein the holding release means is always biased in a direction to release the lock means.