JP2001301791A - Cover opening/closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simply structured cover opening/closing device which can easily and surely open and close a cover for covering the control face of an electronic device main body both automatically and manually. SOLUTION: In a housing 1 which has a front panel 2 with a control face 2a, a left, case 42 and a right case 44 are placed with a first rotating means 22 pivoted rotatively. On the axis 44a of the first rotating means 22, a second rotating means 24 is provided closely and pivoted rotatively. A cover 8 to be opened and closed receiving a turning force fitted on the means 24 is provided being pivoted able to be opened and closed on the face 2a of the housing 1. A driving means having a foam 18 and a motor 12 for supplying the means 22 with the turning force is provided. An elastic member 23 which is positioned between the means 22 and the means 24 for connecting them by friction and which runs idle when the rotation of the means 24 stops owing to sliding generated on a face pressed against the means 22 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover opening / closing device, and more particularly, to a cover opening / closing device for a lid (door) which is supported on a predetermined surface of an electronic device so as to be freely opened and closed.

[0002]

2. Description of the Related Art In recent years, an electronic device has been provided with an operation surface on which a plurality of switches and knobs for improving operability are arranged on a predetermined surface of a housing as various functions are increased. When used, to form an excellent appearance in design,
A lid (door) that hides the operation surface is provided. Conventionally, for such a lid, for example, a lid opening / closing device that locks using a magnet latch when closed and attaches a damper to a rotating shaft during opening / closing operation and rotates well at a predetermined speed is often used. Was. In particular, for example, in electronic devices such as car stereos, home stereo amplifiers, and home video devices, such a lid opening and closing device is often used, and the operation surface is effectively hidden by the lid to provide an excellent design appearance. Had formed.
FIG. 6 is a partially cutaway perspective view showing a conventional lid opening / closing device employed in such an amplifier.

As shown in FIG. 6, a conventional lid opening / closing device employed in an amplifier is provided with a housing 50 including a front panel 52 and a rear case 54 forming an exterior of the amplifier main body. An operation surface 52a on which a plurality of switches and knobs are arranged is formed on the operation surface 52, a lid 58 pivotally supported on the operation surface 52a so as to be openable and closable, and a damper engaged with the lid 58 to adjust the opening and closing operation to a predetermined speed. 60.

Here, as described above, the housing 50 includes the front panel 52 and the rear case 54, and houses a plurality of electronic components such as a printed circuit board (not shown). Also, the front panel 52 of the housing 50
Has an operation surface 52a on which a plurality of switches and knobs electrically connected to a printed circuit board in the housing 50 are arranged so as to protrude.
Is formed. On this operation surface 52a, there are arranged magnet latches 53 which are exposed with magnetic properties on both surfaces. In addition, a damper 60 that engages with a lid 58 that is pivotally supported by the front panel 52 to adjust the opening / closing speed is housed in the housing 50. A gear (gear) 62 that engages with the lid 58 is attached to the tip of the rotation shaft of the damper 60. The lid 58 is provided on the operation surface 52 of the front panel 52.
Both sides at one end are pivotally supported by a, and the operation surface 52a is formed to open and close by rotating about this axis.
A substantially semicircular gear 58b that engages with the damper 60 is formed integrally with the lid 58 on one side surface. Also,
The lid 58 is provided with a lock fitting 57 that is attracted to the magnet latch 53 provided on the operation surface 52a and locks the operation surface 52a in the closed state when the operation surface 52a is closed.

In the conventional lid opening / closing device thus formed, when a user operates a predetermined switch and a knob arranged on the operation surface 52a, a predetermined end of the closed lid 58 is rotated forward. Lock fitting 57 and magnet latch 5
The lid 58 is opened and closed by releasing the suction with the cover 3. on the other hand,
When the user finishes operating the operation surface 52a, the lock metal 57 and the magnet latch 53 are attracted and locked in a closed state by pushing the surface of the lid 58 toward the operation surface 52a. As described above, in the conventional lid opening / closing device, the opening / closing operation of the lid 58 is adjusted by the damper 60, and at the time of closing, the lock fitting 57 and the magnet latch 53 are attracted to be locked in the closed state. On the other hand, there is another embodiment of a conventional lid opening / closing apparatus which automatically opens and closes a lid using a motor, in addition to the conventional lid opening / closing apparatus using such a damper. FIG. 7 is a partially cutaway perspective view showing another embodiment of the conventional lid opening / closing device using such a motor.

As shown in FIG. 7, another embodiment of the conventional lid opening and closing apparatus is employed in an amplifier similarly to the lid opening and closing apparatus shown in FIG. Case 7 composed of panel 72 and rear case 74
0, an operation surface 72a on which a plurality of switches and knobs are arranged is formed on a front panel 72 of the housing 70, and a cover 78 rotatably supported by the operation surface 72a is provided. Another embodiment of the conventional lid opening / closing apparatus is different from the lid opening / closing apparatus shown in FIG. 6 in that a gear 78b engaging with the lid 78 is provided, and a rotational force is applied to the lid 78 via the gear 78b. The feeding motor 80 is housed inside the housing 70.

Here, the housing 70 includes a front panel 72.
And a rear case 74, which accommodates a plurality of electronic components such as a printed circuit board (not shown).
A front panel 72 of the housing 70 has an operation surface 72a on which a plurality of switches and knobs electrically connected to a printed circuit board in the housing 70 are arranged so as to protrude therefrom.
And a power switch 76 disposed on the upper surface of 2a. Here, the front panel 72 of the housing 70 includes
Unlike the lid opening / closing device shown in FIG. 1, an open / close switch 77 is provided on the upper surface of the power switch 76. An opening detection switch 9 for detecting an open state of the lid 78 is provided in the housing 70.
6 and a close detection switch 98 for detecting a state where the lid 78 is closed are arranged on the side surface of the lid 78. Also, the lid 78
Is rotatably supported by the operation surface 72a of the front panel 72, and opens and closes the operation surface 72a by rotating about this axis. Unlike the lid opening / closing device shown in FIG. 6, the lid 78 has a substantially semicircular gear 78b at one end and an open detection at the other end according to the open / closed state of the lid 78. The switch 96 and an arm 78c for turning on / off the close detection switch 98 are formed integrally.

In another embodiment of the conventional lid opening / closing device thus formed, when a user operates a predetermined switch and knob arranged on the operation surface 72a, first, the lid 78 is opened.
The power is supplied by pressing the power switch 76 from the state in which is closed. When the cover 78 is opened, the open / close switch 77
By pressing, the motor 80 in the housing 70 is driven, and the rotational force of the motor 80 is transmitted through the gears 82 and 78b and rotates in the opening direction. At this time, on one side surface of the lid 78, the arm portion 78c simultaneously rotates and the closing detection switch 9
8 and turn off. When the lid 78 rotates to the open state, the arm 78c contacts the open detection switch 96 to turn it on. And the motor 80
Receives the detection result of the ON state and stops the rotation after waiting for the chattering prevention time. As a result, the lid 78 stops in the open state and allows operation on the operation surface 72a.

On the other hand, when the user has finished operating the operation surface 72a, the motor 80 rotates in the reverse direction by pressing the open / close switch 77 again, and the lid 78 is rotated to the closed state.
At this time, the arm 78c of the lid 78 is simultaneously rotated, and the arm 78c is separated from the open detection switch 96 to be turned off. Further, when the lid 78 rotates to the closed state, the arm portion 78c comes into contact with the close detection switch 98 to be turned on. In response to the detection result of this on state, the motor 80 is stopped after waiting for chattering prevention time. Let it. Thus, the lid 78 stops rotating and closes the operation surface 72a. As described above, in another embodiment of the conventional lid opening / closing apparatus, the lid 78 is formed so as to be automatically opened / closed by using the motor 80, and has a higher height than the lid opening / closing apparatus shown in FIG. High performance products were provided.

[0010]

However, in the conventional lid opening / closing apparatus using the damper shown in FIG. 6, since the lid 58 is manually opened and closed, there is no sense of luxury, so that a high-grade electronic device is not used. They are not often used in equipment and lack a sense of luxury, so they have not always been able to satisfy customers. In the case of the conventional lid opening / closing device using the motor shown in FIG. 7, when the arm 78c turns on the close detection switch 98 to close the front panel 72 when the arm 78c closes, the lid 78 contacts the front panel 72. Since there is no allowance in the stroke, the close detection switch 98 does not turn on due to a variation in the arrangement position of the close detection switch 98 in the housing 70, the lid 78 abuts on the front panel 72 and bounces, and There was a quality defect such as rotation stopped in front of the front panel 72 and did not close (open). Further, in the conventional lid opening / closing device, there is a method of controlling by a microcomputer in order to solve the above-mentioned problem. After chattering is prevented at a predetermined timing during the opening / closing operation of the lid 78, a back pulse (reverse rotation) brake, a weak A complicated control mode such as pressing by voltage is required, and there is a problem that designing becomes difficult. An object of the present invention is to solve such a problem and to provide a lid opening and closing device that can easily and accurately open and close a lid that opens and closes an operation surface of an electronic device main body with a simple structure, both automatically and manually. .

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a first rotating means rotatably supported in a housing of an electronic apparatus main body having an operation surface on a predetermined surface. A second rotating means rotatably supported on the same shaft on which the first rotating means is rotatably supported and disposed close to the first rotating means; and a second rotating means rotatably supported on an operation surface of the housing so as to be openable and closable. A lid that engages and opens and closes by receiving a rotational force, a driving unit that applies a rotational force to the first rotating unit to rotate the first rotating unit, and a first rotating unit and a second rotating unit that are provided close to each other on the same axis in the housing. Interposed between the first rotating means and the second rotating means by frictional force to transmit the rotating force of the driving means from the first rotating means to the second rotating means, and to stop the rotation of the lid. Also, when the rotation of the second rotating means stops, a slip occurs on the contact surface of the first rotating means which is pressed against and slips. It provided a rotation transmitting means for absorbing the rotational force of the driving means by.

Here, it is preferable to provide a speed reducing means for reducing the rotational speed transmitted from the driving means and applying a predetermined rotational force to the lid between the second rotating means and the lid. Also,
The rotation transmitting means is a frictional force transmitting member having a clutch structure for pressing the first rotating means and the second rotating means and connecting the contact surfaces by frictional force. The frictional force transmitting portion is made of an elastic material such as felt. And an elastic member having a predetermined hardness. Further, it is preferable that an urging member such as an elastic spring is provided on the shaft of the first rotating means and the second rotating means, and the first rotating means and the second rotating means are pressed against each other. Further, the rotation transmitting means is formed such that when the lid is stopped during the opening / closing operation, slippage occurs on the pressure contact surface between the first rotating means and the second rotating means due to the weight of the lid, causing the lid to idle. Is preferred.
Further, the rotation transmitting means is formed such that when the lid is stopped after the opening and closing operation, the first rotating means rotated by the driving means slips on the pressure contact surface with the second rotating means for a certain time to idle. Is preferred. Also, the driving means is
It is preferable that a rotational axis is provided in a direction orthogonal to the axial direction of the first rotating means to apply a rotating force to the first rotating means.
Further, the driving means and the first rotating means are disposed so as to be orthogonal to each other, and one of them is provided with a worm gear and the other is provided with a helical gear, and the driving means and the helical gear are meshed with each other. Preferably, the rotation is transmitted to the first rotating means. Also, the electronic device body
An electronic device body such as a car stereo or a home stereo amplifier having an openable and closable lid on an operation surface in which a plurality of operation buttons and knobs are arranged on a predetermined surface of a housing is preferable.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a lid opening / closing device according to the present invention will be described in detail with reference to the accompanying drawings. FIG.
1 is a configuration diagram illustrating an embodiment of a lid opening / closing device according to the present invention. FIG. 2 shows the clutch member 20 shown in FIG.
FIG. 2 is an exploded perspective view showing the structure of FIG. FIG. 3 is a top view showing the engaged state of the clutch member 20 viewed from the direction A shown in FIG. FIG. 4 is a partially cutaway perspective view showing a state where the lid opening / closing device shown in FIG. 1 is assembled. 5 is an operation explanatory view showing the operation of the lid opening / closing device shown in FIG. 1. FIG. 5 (a) shows a state where the lid 8 is closed, and FIG. 5 (b) shows a state where the lid 8 is opened. Are respectively shown.

As shown in FIG. 1, an embodiment of a lid opening / closing device according to the present invention is employed in an amplifier similarly to the prior art shown in FIG. 7, and a front panel 2 forming an exterior of an amplifier main body. And a housing 1 comprising a rear case 4 and a plurality of switches on a front panel 2 of the housing 1.
An operation surface 2a on which a knob is arranged is formed.
A lid 8 pivotally supported so as to be openable and closable. The embodiment of the lid opening / closing device according to the present invention is different from the prior art shown in FIG. 7 in that a driving unit 10 (see FIG. 3) having a motor 12 for transmitting a driving force and a driving unit for driving the driving unit 10 are provided. Clutch member 20 having a clutch structure for transmitting force to lid 8
And a speed reducing means 30 interposed between the clutch member 20 and the lid 8 to adjust the rotation speed of the motor 12 (see FIG. 3).
And

Here, similarly to the prior art shown in FIG. 7, the housing 1 includes a front panel 2 and a rear case 4, and accommodates a plurality of electronic components such as a printed circuit board (not shown). are doing. The front panel 2 of the housing 1 has an operation surface 2 on which a plurality of switches and knobs electrically connected to a printed circuit board in the housing 1 are arranged so as to protrude.
a and a power switch 6 disposed on the upper surface of the operation surface 2a.
And an open / close switch 7 arranged on the same surface of the power switch 6.

The cover 8 is formed in a plate shape so as to cover the operation surface 2a of the front panel 2 and open and close. The cover 8 projects from both sides of the plate shape and supports the front panel 4 so as to be rotatable. A shaft 8a is provided, and the operation surface 2a is opened and closed by rotating about the support shaft 8a. Here, a substantially semicircular gear (gear) 8b is attached to the support shaft 8a on one end side of the lid 8 and an arm 8c extending from the gear 8b.
And are integrally formed. The lid 8 is different from the prior art shown in FIG. 7 in that the rotational force of the motor 12 transmitted from the driving means 10 (see FIG. 3) to the speed reducing means 30 (see FIG. 3) via the clutch member 20 is transmitted. It is formed so that it can be received and opened.

The driving means 10, the clutch member 20, and the deceleration means 30 are assembled together to form a left case 42.
And, it is housed in the right case 44 and transmits the rotational force from the motor 12 to the lid 8. Here, two open detection switches 46 and a close detection switch 48 are provided on the outer surface of the right case 44.
Are mounted at positions where they can be turned on and off by the arm portions 8c of the lid 8. Further, the driving means 10
Motor 1 connected to a printed circuit board in housing 1 and rotating
2 and a worm 18 rotated by the motor 12. The motor 12 is provided with a first pulley 13 formed in a pulley shape at the end of a rotating shaft.
The worm 18 is rotatably mounted by inserting the spacer 17 into the rotating shaft, mounting the second pulley 16 formed in a pulley shape at the tip, and mounting the spacer 17 on the left case 42 and the right case 44. Supported. This motor 1
2 and the worm 18 are connected to the left case 42 and the right case 44
The first pulley 13 and the second pulley 16 are supported in a state in which the first pulley 13 and the second pulley 16 are exposed to the outside, and the first pulley 13 and the second pulley 16 are connected by a rubber belt 14 so as to be interlocked.

The speed reducing means 30 (see FIG. 3) is formed by engaging a first speed reducing member 32, a second speed reducing member 34, and a third speed reducing member 36 having large and small diameter gears, respectively. ing. In this speed reduction means 30, the rotational force from the motor 12 is transmitted to the first reduction member 32 via the clutch member 20 and transmitted to the gear 8b of the lid 8 via the second reduction member 34 and the third reduction member 36. Is positioned by the spacer 38 so as to be supported by the shaft 44a of the right case 44.

The clutch member 20 is connected to the driving means 10.
Rotating means 22 having a helical gear shape for transmitting the rotational force of the motor 12 by being orthogonally engaged with the worm 18.
And a second rotating means 24 connected to the first rotating means 22 by a frictional force via an elastic member 23 to transmit the rotating force to the first reduction member 32. As shown in FIG. 2, the clutch member 20 inserts and supports a first rotating unit 22 and a second rotating unit 24 that are connected to each other with an elastic member 23 interposed therebetween. It is fixed by an E-clip 27 in a state where a pressing force is applied by a spring 26 and a washer 25 from the first rotating means 22 side. Therefore, the first rotating means 22 is urged by the spring 26 and presses against the second rotating means 24 with the elastic member 23 interposed therebetween, so that the frictional force of the elastic member 23 reduces the rotating force of the motor 12 to the second rotating means. 24.

As shown in FIG. 3, the drive means 10, the clutch member 20, and the speed reduction means 30 formed as described above first have the worm 18 of the drive means 10 orthogonal to the first rotation means 22 of the clutch member 20. Then, the rotational force of the motor 12 (see FIG. 1) is transmitted from the driving means 10 to the clutch member 20. And the clutch member 20 is
The second rotating means 24 engages with the first speed reducing member 32 of the speed reducing means 30 to transmit the rotational force. Further, the speed reduction means 30 converts the torque transmitted to the first speed reduction member 32 into the second speed reduction member 3.
4 and the third reduction member 36 in this order.
To the gear 8b of the lid 8. At this time, the speed reduction means 30
Then, the rotational force of the second rotating means 24 is received by the large-diameter gear of the first reduction member 32, and the second reduction member 34 is received by the small-diameter gear.
, The rotation speed is reduced by the gear ratio. Similarly, the second reduction member 34 and the third reduction member 3
6, the torque reduced to a predetermined speed can be transmitted to the gear 8 b of the lid 8. Then, the driving means 10, the clutch member 20, and the speed reduction means 30 engaged in this manner are housed in the housing 1 of the amplifier main body so as to open and close the lid 8 as shown in FIG. Will be possible.

According to the embodiment of the lid opening / closing device according to the present invention, when the user operates a predetermined switch and a knob arranged on the operation surface 2a, first, the power switch 6 is turned off with the lid 8 closed. Press to supply power. When the lid 8 is opened, the user presses the open / close switch 7 to drive the motor 12 of the driving means 10 in the housing 1.
2 is transmitted from the worm 18 to the gear 8b of the lid 8 via the clutch member 20 and the speed reducing means 30, whereby the lid 8 rotates in the opening direction. Here, the lid 8 is
As shown in (a), when closing, the arm portion 8c contacts the close detection switch 48 to turn on the close detection switch 48. When the motor 12 rotates in the opening direction, the arm portion 8c rotates simultaneously. And moves away from the closing detection switch 48 to turn off the closing detection switch 48. And
The lid 8 rotates in the opening direction, and as shown in FIG.
It stops in the open state and allows operation on the operation surface 2a (see FIG. 1).

At this time, the arm 8c of the lid 8 shown in FIG. 5B is turned to the side of the open detection switch 46 and is brought into contact with the cover 8 to turn on the open detection switch 46. Here, the motor 1
In contrast to the prior art 2 shown in FIG. 7, the reference numeral 2 receives the detection result of the ON state from the open detection switch 46 and stops the rotation after waiting for the chattering prevention time and the overrun time. The overrun time starts after the chattering prevention time.
Is the time for which the motor 12 is driven for a predetermined time until after opening and stopping the rotation. Here, during the overrun time, when the lid 8 stops rotating and the gear 8b shown in FIG. 3 stops, the speed reduction unit 30, the clutch member 20, and the driving unit 10 also stop suddenly and engage in each engagement. Load on the part. Therefore, in the clutch member 20, when the lid 8 is stopped in the open state and the speed reduction means 30 shown in FIG. 3 is stopped, the elastic member 23 is subjected to friction at the pressure contact surface between the first rotation means 22 and the second rotation means 24. The torque due to the force cannot be transmitted, and the motor slips and slips, thereby absorbing the rotational force of the motor 12. Therefore, the motor 12 does not need to stop rotating in accordance with the detection of the open detection switch 46 and the close detection switch 48,
After the chattering prevention time, it is possible to provide an overrun time for causing the clutch member 20 to run idle and to set to stop.

On the other hand, when the user finishes the operation on the operation surface 2a, by pressing the open / close switch 7 (see FIG. 4) again, the motor 12 reversely rotates and the lid 8 is rotated to the closed state. Let it. At this time, the lid 8 is rotated in the closing direction shown in FIG.
, The open detection switch 46 is turned off. When the lid 8 rotates to the closed state shown in FIG. 5A, the arm 8c contacts the close detection switch 48 to turn on the close detection switch 48. Here, the motor 12 receives the detection result of the ON state from the close detection switch 48, and stops the rotation after waiting for the chattering prevention time and the overrun time as described above. In this overrun time, as shown in FIG. 5A, the lid 8 rotates and comes into contact with the front panel 4 to stop in a closed state.
The motor 12 is stopped by rotating the pressure contact surface between the first rotating means 22 and the second rotating means 24 of the clutch member 20 shown in FIG. This ensures that the lid 8 stops at the position where the operation surface 2a is closed.

The lid 8 is formed so that when the power is turned off during the opening / closing operation, the user rotates the lid 8 manually so that the clutch member 20 idles and can be easily opened / closed. When the power is turned off during the opening / closing operation, the lid 8 adjusts the elastic member 23 and the spring 26 so as to maintain the rotational position at that time. As described above, in the present embodiment, the clutch is configured to absorb the load by idling by the clutch member 20. Therefore, by providing a long overrun time under the control of the microcomputer, the lid 8 closes in front of the front panel 2. (Opening) It is possible to prevent a problem of not being cut and prevent the lid 8 from abutting on the front panel 2 and bouncing.

Although the embodiment of the lid opening / closing device according to the present invention has been described in detail above, the present invention is not limited to the above-described embodiment, and can be changed without departing from the gist of the present invention. For example, an embodiment in which the lid opening / closing device according to the present invention is employed in an amplifier has been described. However, the present invention is not limited to this, and a lid that can be opened and closed on an operation surface having a plurality of operation buttons, knobs, and the like arranged on a predetermined surface. The present invention can be applied to an electronic device main body such as a car stereo having the above.

[0026]

As described above, according to the lid opening / closing device according to the present invention, when an excessive load is applied to the clutch member, the clutch member is idled to release the force, so that each engagement of the speed reduction means, the clutch member and the drive means is achieved. In addition to being able to reduce the load on the parts, it is possible to open and close easily without being affected by the gear deceleration of the engaging part by rotating due to idling of the clutch member when opening and closing manually, thereby improving the reliability of the product. Becomes possible. Further, according to the lid opening / closing device according to the present invention, the lid is stopped at the open / close position to apply force by idling of the clutch member to reliably maintain the open / close position. In addition to absorbing fluctuations in the motor, the design of the microcomputer control can be simplified and the elastic member has a damping effect. It becomes possible to provide a low-cost product.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a lid opening / closing device according to the present invention.

FIG. 2 is an exploded perspective view showing the structure of the clutch member shown in FIG.

FIG. 3 is a top view showing an engaged state of the clutch member as viewed from a direction A shown in FIG. 1;

FIG. 4 is a partially cutaway perspective view showing a state where the lid opening / closing device shown in FIG. 1 is assembled.

FIG. 5 is an operation explanatory view showing an operation of the lid opening / closing device shown in FIG. 1;

FIG. 6 is a partially cutaway perspective view showing a conventional lid opening / closing device.

FIG. 7 is a partially cutaway perspective view showing another embodiment of the conventional lid opening / closing device using a motor.

[Explanation of symbols]

 Reference Signs List 1 housing 2 front panel 2a operation surface 4 rear case 6 power switch 7 open / close switch 8 lid 8a support shaft 8b gear 8c arm unit 10 driving means 12 motor 13 first pulley 14 rubber belt 16 second pulley 17 spacer 18 worm 20 clutch member 22 First rotating means 23 Elastic member 24 Second rotating means 26 Spring 30 Reduction means 32 First reduction member 34 Second reduction member 36 Third reduction member 38 Spacer 42 Left case 44 Right case 44a Shaft 46 Open detection switch 48 Close detection switch

Continued on the front page F term (reference) 3E084 AA05 AA14 BA02 CA03 FA08 GA06 GB06 KA16 4E360 AB03 AB12 AB20 BA04 BA06 BB02 BB16 BB22 BC03 BC06 BC07 BC12 EA18 ED04 ED23 ED24 ED27 FA08 GA06 GA46 GB13 GB14

Claims (10)

[Claims] A first rotating means rotatably supported in a housing of an electronic device main body having an operation surface on a predetermined surface; and a rotatable coaxially rotatably supported by the first rotating means. A second rotating means which is pivotally supported near the first rotating means, and a lid which is pivotally supported on the operation surface of the housing so as to be openable and closable, engages with the second rotating means and receives a rotational force to open and close. A driving means for applying a rotational force to the first rotating means to rotate the first rotating means; and a frictional force interposed between the first rotating means and the second rotating means disposed on the same axis in the housing. The first rotating means and the second rotating means are connected to each other to transmit the rotational force of the driving means from the first rotating means to the second rotating means, and the rotation of the lid is stopped together with the second rotating means. When the rotation of the first rotation means is stopped, slip occurs on the contact surface of the first rotating means which is pressed against and slips. Cover opening and closing device, characterized in that provided a rotation transmitting means for absorbing the rotational force of the drive means by. 2. The lid opening / closing device according to claim 1, wherein a rotational force transmitted from the driving means is reduced between the second rotating means and the lid, and a predetermined rotational force is applied to the lid. A lid opening / closing device, characterized in that a speed reducing means for providing a force is provided. 3. The lid opening / closing device according to claim 1, wherein the rotation transmitting unit includes a clutch structure that presses the first rotation unit and the second rotation unit and connects the contact surfaces by a frictional force. A lid opening / closing device, which is a frictional force transmitting member. 4. The lid opening / closing device according to claim 3, wherein the frictional force transmitting portion is an elastic member having elasticity such as felt and having a predetermined hardness. 5. The lid opening / closing device according to claim 1, wherein an urging member such as an elastic spring is provided on an axis of the first rotating means and the second rotating means, and the first rotating means and the second rotating means are pressed against each other. A lid opening and closing device characterized by the above-mentioned. 6. The lid opening / closing device according to claim 1, wherein the rotation transmission unit presses the first rotation unit and the second rotation unit when the operation of the lid is stopped during the opening / closing operation. A lid opening and closing device characterized in that the lid is opened and slipped on the surface. 7. The lid opening / closing device according to claim 1, wherein the rotation transmitting means is configured such that, when the lid is stopped after the opening / closing operation, the first rotating means rotated by the driving means keeps the first rotating means rotating for a predetermined time. A lid opening / closing device characterized in that the lid opening / closing device is formed so as to generate slip on a pressure contact surface with the two-rotation means and run idle. 8. The lid opening / closing device according to claim 1, wherein the driving unit has a rotation axis in a direction perpendicular to an axial direction of the first rotation unit, and the driving unit applies a rotation force to the first rotation unit. And a lid opening and closing device. 9. The lid opening / closing device according to claim 1, wherein the driving unit and the first rotating unit are arranged so as to be orthogonal to each other, and one of the driving unit and the first rotating unit includes a worm gear, and the other includes a helical gear. A cover opening / closing device, wherein the rotation of the driving means is transmitted to the first rotating means by engagement of the worm gear and the helical gear. 10. The lid opening and closing device according to claim 1, wherein the electronic device main body has the lid that can be opened and closed on an operation surface on which a plurality of operation buttons, knobs, and the like are arranged on a predetermined surface of the housing. A lid opening / closing device, which is an electronic device main body such as a car stereo or a home stereo amplifier.