JPH07154079A - Cover body opening mechanism - Google Patents

Abstract

PURPOSE:To allow stabilized opening of a cover body (front panel) at any fixing angle of a machine in which the cover body is fixed rotatably to the housing. CONSTITUTION:A resilient member (spring) 23 imparting elastic energy for opening a cover plate 18 (front panel 14) has adjustable spring force. Spring force of the resilient member 23 is adjusted by turning an operating plate 29 disposed on the side of the housing 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid opening mechanism,
Especially, it is suitable to be applied to a device whose mounting angle is not constant depending on the object to be used.

[0002]

2. Description of the Related Art First, a conventional lid opening mechanism will be briefly described with reference to FIG. In the figure, 1 is a housing of the device, 2 is a lid for opening and closing the housing 1, and the lid 2 is rotatably supported by the housing 1 via a support shaft 3. An elastic member (torsion coil spring) 4 is attached to a shaft support portion of the cover body 2, that is, a portion of the support shaft 3, one end of which is fixed to the housing 1 side and the other end of which is stopped to the cover body 2 side. The lid 2 is always urged to rotate with respect to the housing 1 in the opening direction by the force of the elastic member 4.

When the lid body 2 is closed against this force (A in the figure), the lid body 2 is locked by a lock mechanism (not shown), and when this lock is released, the lid body 2 is pushed by the force of the elastic member 4. It is opened (Figure B).

[0006] Such a lid opening mechanism has a great inconvenience for a device having a non-uniform mounting angle. That is, in a device mounted at an angle (the state shown) in which the housing 1 is tilted horizontally, the lid body 2 uses the elastic energy of the elastic member 4 as an initial torque, and the gravitational energy due to the weight of the lid body itself is added to this. It is released by being added. On the other hand, when the housing 1 is attached at a substantially vertical angle, the gravitational energy due to the weight of the lid body 2 acts as a minus, and the lid body 2 opens with elastic energy by the elastic member 4 against this. Will be done.

In this case, gravity and elastic energy are balanced with each other, and the lid may not be opened. Therefore, if you use elastic members with a strong spring force and increase the elastic energy, this time the lid will open more than necessary when the housing is mounted horizontally, causing damage to its shaft support. Will be lost.

As described above, in the conventional lid opening mechanism, the opening of the lid differs depending on the mounting angle of the device, so that the mounting angle of the device must be limited. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mechanism by which a good opening operation of a lid is always performed regardless of the mounting angle of a device.

[0007]

In order to achieve the above-mentioned object, the present invention has a lid body attached to a device casing so as to be openable and closable, and the opening of the lid body depends on the attachment angle of the casing to cause gravitational energy. The elastic energy can be variably adjusted in the lid opening mechanism that performs both or one of the elastic energy and the elastic energy. It is preferable to use a cam as an adjusting mechanism for changing the elastic energy.

[0008]

As described above, according to the present invention, the elastic energy at the time of opening operation of the lid can be variably adjusted, so that if the above adjustment is performed according to the attachment angle of the device, the lid is stable at any attachment angle. Will be released.

[0009]

Embodiments of the present invention will be described below with reference to the drawings (FIGS. 1 to 8). In this example, the case where the present invention is applied to an on-vehicle audio device is shown.

In the figure, reference numeral 10 designates an audio device mounted on a vehicle, for example, a compact disc (CD) player as a whole, and 11 is a housing thereof, and operation buttons 12 and a display section (display) 13 are provided on the front surface of the housing 11. Is provided with a front panel 14.

The front panel 14 is opened so as to fall forward as shown in FIG. 2, whereby the insertion port 15 on the front surface of the housing 11 is opened, and a compact disc (CD) is inserted from this insertion port 15. It

In this device, the front panel 14 can be removed as shown in FIG. 3 with the insertion opening 15 opened as described above.
In this way, by removing the front panel 14, the operation of the device body becomes impossible, and the device body can be prevented from being stolen.

The structure of the mounting portion of the front panel 14 in the device 10 of the present embodiment configured as described above will be described in more detail. First, on the front surface portion of the housing 11, the bearing protrusions 16 protruding left and right are provided. The lid plate 18 is inserted through the support shaft 17 into the insertion port 1.
5 is pivotally supported so as to open and close 5. The lid plate 18 is provided with holding portions 19 on both left and right sides, and correspondingly, an engaging portion 20 is provided on the back side of the front panel 14, and the engaging portion 20 is provided on the holding portion 19. The front panel 14 is attached to the cover plate 18 by engaging them. Further, the engagement recess 21 formed on the lid plate 18 and the engagement plate 22 provided on the back side of the front panel 14 are engaged with each other, whereby the front panel 14 is fixed to the lid plate 18.

The cover plate 18 is constantly urged to rotate in the opening direction by an elastic member 23 attached to the shaft support portion, that is, the support shaft 17. Further, the cover plate 18 is provided with a lock pin 24, and correspondingly, a lock claw 25 is provided on the housing 11 side, so that the cover plate 18 (front panel 14) resists the force of the elastic member 23. In the closed state, the lock pin 24 is engaged with the lock claw 25 so that the cover plate 18 is locked in that state.

When releasing the lock, when a release button 26 provided on the front surface of the front panel 14 is pushed, a push pin 26a integral with the release button 26 projects from the back side of the front panel 14 to push the lock claw 25. As a result, the lock claw 25 is disengaged from the lock pin 24 and the lock is released.

When the lock is released in this manner, the lid plate 18
The (front panel 14) is opened by the force of the elastic member 23 (FIG. 2), and in this state, the locking plate 22 of the front panel 14 is pushed to release the engagement with the locking recess 21, and the front panel 14 is pulled forward. The front panel 14 can be removed from the cover plate 18 by pulling the engaging portion 20 out of the holding portion 19 by pulling the front panel 14 (FIG. 3).

The device 10 of the present example configured as described above.
In the above, the adjustment mechanism for changing the elastic energy by the elastic member 23 when the cover plate 18 (front panel 14) is opened is provided.

This adjusting mechanism is constructed as follows. The elastic member 23 used in the present example is a torsion coil spring as is apparent from FIG. 4, and this torsion coil spring has a coil portion 23 a fitted to the support shaft 17 so that the bearing of the housing 11 is supported. It is arranged between the projecting piece 16 and the cover plate 18, one terminal portion 23b is attached to the cover plate 18 side, and the other terminal portion 23c is brought into contact with the eccentric cam member 27 provided on the housing 11 side. is there.

The eccentric cam member 27 is eccentrically fixed to a shaft 28 rotatably supported by the casing 11.
The peripheral surface thereof is formed in a polygonal shape (octagonal shape in this example) having a plurality of flat surfaces, and the end portion 23c of the elastic member (torsion coil spring) 23 is formed on the peripheral surface of the eccentric cam member 27.
Is pressed.

An operation plate 29 coaxially fixed to the eccentric cam member 27 is provided on the side surface of the housing 11,
That is, the eccentric cam member 27 is rotated integrally with the operation plate 29.

The operating plate 29 is rotated by a driver (so-called plus driver) 100 as shown in FIG. 6, for example. That is, a dodecagonal concave hole 30 is formed at the center of rotation of the operation plate 29, and the dodecagonal tip portion 100a of the driver 100 is inserted into the concave hole 30 to rotate the operation plate 29 to be integrated with the operation plate 29. The eccentric cam member 27 is eccentrically rotated. In addition, this operation plate 2
It is advisable to provide a scale around 9 as a guide for the rotation angle of the eccentric cam member, as shown in the figure.

When the eccentric cam member 27 is rotated in this manner, the bending angle of the end portion 23c of the elastic member (torsion coil spring) 23 changes, as shown continuously in FIGS.
Therefore, the strength of the spring force, that is, the elastic energy when the cover plate 18 (front panel 14) is opened is variably adjusted. In this example, since the eccentric cam member 27 is a polygonal cam, the end portion 23c of the elastic member 23 is always in contact with the flat surface of the peripheral surface and pressed toward the rotation center (the shaft 28). It's stable and won't rotate accidentally.

As described above, the device 10 of the present embodiment has the cover plate 18
Since it is possible to variably adjust the elastic energy by the elastic member 23 when the (front panel 14) is opened, by performing this in accordance with the mounting angle of the device 10, the lid plate 18 (front panel 14) can be stably operated. The opening operation is performed.

That is, when the housing 11 is mounted at a horizontally tilted angle (state shown) (when the mounting angle is small),
Considering that gravitational energy due to its own weight is added in the opening operation of the cover plate 18 (front panel 14), the elastic torque by the elastic member 23 is adjusted to be relatively weak to reduce the initial torque during the opening operation. In addition, when mounting the housing 11 at an upright angle (when the mounting angle is large), the cover plate 18 (front panel 1
In consideration of the fact that the weight of 4) acts as a minus during the opening operation, the elastic energy by the elastic member 23 is adjusted relatively strongly to increase the initial torque during the opening operation, and in any case, the cover plate 18 The (front panel 14) is smoothly opened.

Therefore, according to the mechanism of this embodiment, the mounting angle of the device is not limited, and any mounting posture can be accommodated.

Although the embodiments of the present invention have been described above, the present invention is not limited to this configuration. For example, the eccentric cam member 27 is not limited to the octagonal shape shown in the present example, but if the eccentric cam member 27 has a polygonal shape, fine adjustment can be performed correspondingly.

FIG. 7 shows another example of a method of operating the operation plate 29, in which the operation plate 29 is operated by using the special tool 101. That is, in this case, the special tool 1
Two pins 101a, 101 provided at the tip of 01
The operation plate 29 is formed with recessed holes 31a and 31b corresponding to b, and the pins 101a and 31b are inserted into the recessed holes 31a and 31b.
101b is inserted and rotated. Alternatively, as shown in FIG. 8, a grip portion 29a may be provided on the operation plate 29, and the grip portion 29a may be gripped by hand and rotated.

Needless to say, the present invention is not limited to the equipment shown in the embodiments but can be widely applied to any lid opening mechanism.

[0029]

As is apparent from the above description, the present invention makes it possible to variably adjust the elastic energy during the opening operation of the lid body, thereby reducing the influence of gravity in the opening operation of the lid body. Therefore, by applying the present invention to a device whose mounting angle is not constant depending on the object of use, the lid is always stably opened at any mounting angle, and the mounting angle of the device is not limited.

[Brief description of drawings]

FIG. 1 is a perspective view of a device to which the present invention is applied, in which a lid plate (front panel) is closed.

FIG. 2 is a state in which a cover plate (front panel) is open.

FIG. 3 is a state in which the front panel is removed.

FIG. 4 is a side view of the adjusting mechanism section according to the present invention.

FIG. 5 is an operation explanatory diagram of the main part of the same.

FIG. 6 is an explanatory diagram of an operation unit of the same.

FIG. 7 is an explanatory diagram of another example of the operation unit of the same.

FIG. 8 is an explanatory diagram of still another example of the operation unit.

FIG. 9 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 11 housing 14 front panel 18 cover plate 23 elastic member 27 eccentric cam member 29 operation plate

Claims (2)

[Claims] 1. A lid opening mechanism in which a lid is rotatably and rotatably attached to an equipment casing, and the lid is opened by gravity energy and / or elastic energy depending on an attachment angle of the casing. , A lid opening mechanism characterized in that elastic energy can be variably adjusted. 2. The opening mechanism for the lid according to claim 1, wherein a cam is used as an adjusting mechanism for varying the elastic energy.