JPH023652Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lid opening/closing device for electrical equipment such as audio equipment.

[Conventional technology]

It is known that electrical equipment, such as audio equipment such as amplifiers and tuners, has a structure in which lids are provided on the operation parts of various knobs so that they can be opened and closed.
Conventionally, as shown in FIG. 5, a lid 2 is pivotally attached to a predetermined position of a chassis 1 so as to be openable and closable.

[Problem that the invention attempts to solve]

In the conventional structure, (a) the lid is opened and closed manually, so the lid must be opened and closed by hand each time;

(b) When the lid transitions from the closed state to the open state, the lid draws a circular trajectory around the pivot axis, so in the open state, the lid is in a horizontal state and protrudes forward from the front panel. , the lid itself gets in the way of operating the various knobs.

There are other problems.

The present invention aims to solve these problems.

[Means for solving problems]

In the present invention, a shaft fixed to the horizontal mounting part of the lid is inserted into first and second slide grooves provided on both side surfaces of the case, and a rotating disk is fixed to the tip of the shaft.
The shaft is supported rotatably and slidably along the first and second slide grooves, and a cam having a partially large diameter portion is fixed to the shaft within the case. When the large diameter portion is closed, the shaft is locked to the locking portion of the opening of the case, and the shaft is connected to the first and second shafts.
The outer diameter of the cam on the straight line connecting the shaft and the locking part decreases as the cam rotates, and the cam is held at the front position of the slide groove of the case. A second spring is inserted, a driving rope is connected to the first spring with one end fixed, and the driving rope is wound around the rotating disk with a constant frictional force, and the driving rope is connected to a motor, etc. The lid is towed by a driving source, and is provided with a stop mechanism for stopping the lid in an open state.

[Effect]

With the above configuration, when the lid transitions from the closed state to the open state, the following trajectory is drawn.

(a) In the lid closed state, the large diameter portion of the cam is locked in the locking portion of the opening of the case, and the shaft is located at the forwardmost position of the first and second slide grooves.

(b) When the drive rope is pulled backward by a drive source such as a motor, the rotating disk, shaft, and cam rotate counterclockwise, and the lid also rotates counterclockwise.

As the cam rotates, the outer diameter of the cam on the straight line connecting the shaft and the locking part of the opening of the case becomes smaller, so the cam moves into the case against the elasticity of the second spring. start.

(c) When the cam is further rotated by the traction of the drive rope and the lid is in a horizontal position, the outer diameter of the cam becomes the minimum and the cam is released from the locking part of the opening. At this time, the cam (and/or the rotating disk and/or the lid) is forcibly stopped by appropriate means so that it does not rotate any further.

In this state, when the drive rope is further towed, the shaft and cam slide rearward along the slide groove and the inner wall of the case, so the lid maintains its horizontal position and moves rearward, opening the lid. of.

(d) When the lid transitions from the open state to the closed state, it similarly follows the opposite trajectory to the above and returns to the closed state.

〔Example〕

This will be explained with reference to FIGS. 1 to 4.

Reference numeral 3 denotes a lid, and a shaft 5 is fixed to a horizontal mounting portion 4 integrally provided at the bottom of the lid, and first and second lids are provided on both sides of a case 6 that has this shaft 5 fixed to a chassis (not shown). is inserted into the slide grooves 7 and 8 of the shaft 5, and a rotation disk 9 is fixed to the tip of the shaft 5 so that the shaft 5 can be rotated.
8 so as to be slidable in the front-rear direction.

In the case 6, a cam 10 having a large diameter portion 10a is fixed to the center of the shaft 5, and a second spring 1 is installed between the cam 10 and the rear inner wall of the case 6.
1 is inserted, and the elasticity of this second spring 11 constantly presses the cam 10 forward.

When the large diameter portion 10a of the cam 10 is in the closed state, the cam 10 has an opening 12 at the front upper end of the case 6.
It is locked in the locking part 13 of. As the cam 10 rotates, the outer diameter of the cam 10 on the straight line connecting the shaft 5 and the locking part 13 of the opening 12 becomes smaller. When the outer diameter of the cam 10 becomes the minimum, the locking state between the cam 10 and the locking portion of the opening 12 is released, and the cam 10
becomes able to slide back and forth within the case 6.

On the other hand, a driving rope 15 is connected to the other end of a first spring 14 whose one end is fixed to a chassis (not shown), and this driving rope 15 is wound around the rotating disk 9 with a constant frictional force. , its end is wrapped around the pulley 17 of the motor 16 and fixed.

In addition, at an appropriate location on the chassis (not shown),
A stop mechanism 18 is provided for forcibly stopping the lid 3 from rotating any further when the lid 3 is rotated forward by 90 degrees and placed in a horizontal state.

Next, the operation of the above embodiment will be explained.

Closed state As shown in FIG. 1, the large diameter portion 10a of the cam 10
is locked in the locking part 13 of the opening 12 of the case 6, and the shaft 5 is locked in the first and second slide grooves 7,
It is located at the frontmost position of 8.

When transitioning from the closed lid state to the open lid state (a) When the pulley 17 of the motor 16 rotates and the drive rope 15 is wound in the direction of the arrow, the rotating disc 9, shaft 5 and cam 10 rotate counterclockwise. The lid 3 also rotates counterclockwise.

As the cam 10 rotates, the shaft 5 and the opening 12
The cam 10 on the straight line connecting the locking part 13 of
Since the outer diameter of the cam 10 gradually decreases, the cam 10 becomes
As shown in FIG. 2, it begins to move into the case 6 against the elasticity of the second spring 11. At the same time, the shaft 5 also begins to move rearward along the first and second slide grooves 7 and 8.

The above operation continues until the lid 3 is in a horizontal position.

(b) When the lid 3 is rotated until it becomes horizontal, the lid 3
The lower end of the lid 3 hits the stop mechanism 18, and the lid 3 is forcibly stopped.

On the other hand, since the outer diameter of the cam 10 is the minimum, the cam 10 is released from the locking portion 13 of the opening 12. (See Figure 3) In this state, the pulley 17 of the motor 16
When the drive rope 15 rotates, the drive rope 15 slides on the outer peripheral surface of the rotating disk 9 and is wound up, so the cam 10 and the shaft 5 are connected to the case 6, while the cam 10 and the rotating disk 9 remain stationary. The lid 3 slides in the first and second slide grooves 7 and 8 and moves rearward, and the lid 3 also moves rearward at the same time.
It will be in the open state as shown in the figure.

When transitioning from the open lid state to the closed lid state, due to the elastic restoring forces of the first and second springs 14 and 11, a trajectory opposite to the above is drawn, and the lid is closed.

[Effect of idea]

The present invention has the following features: (a) The lid 3 can be opened and closed automatically by a drive source such as the motor 16.

(b) The lid 3 rotates until it is in a horizontal position, during which time the lid retreats slightly, and then retreats to a predetermined position to be in an open state. In this open state, the lid 3 is stored in the chassis. This has the effect of making it easier to operate the various knobs.

[Brief explanation of drawings]

1 to 4 are diagrams showing the structure of the lid opening/closing device of the present invention, and FIG. 5 is a diagram showing the structure of a conventional lid opening/closing device. 3...Lid, 4...Horizontal mounting part, 5...Shaft, 6...
...Case, 7, 8...First and second slide grooves,
9... Rotating disk, 10... Cam, 10a... Large diameter portion, 11... Second spring, 12... Opening, 13
... Locking part, 14 ... First spring, 15 ... Drive rope, 16 ... Motor, 17 ... Pulley, 18
...Stopping mechanism.

Claims (1)

[Scope of utility model registration request] The shaft 5 fixed to the horizontal mounting part 4 of the lid 3 is attached to the case 6.
first and second slide grooves 7 provided on both side surfaces of the
8, and a rotary disk 9 is fixed to the tip of the shaft 5, so that the shaft 5 can be rotated and slidable along the first and second slide grooves 7, 8. A cam 10 having a large diameter portion 10a is fixed to the shaft 5 in the case 6, and the large diameter portion 10a of the cam 10 is fixed to the locking portion of the opening 12 of the case 6 when the lid is closed. 13 to hold the shaft 5 at a position in front of the first and second slide grooves 7 and 8, and as the cam 10 rotates, a straight line connects the shaft 5 and the locking portion 13. The outer diameter of the upper cam 10 is made smaller, a second spring 11 is inserted between the cam 10 and the rear part of the case 6, and a drive rope 15 is connected to the first spring 14 with one end fixed. is connected, the driving rope 15 is wound around the rotating disc 9 with a constant frictional force, the driving rope 15 is towed and driven by a driving source, and the lid 3 is stopped in an open state. A lid opening/closing device characterized in that it is provided with a stop mechanism 18 for causing the lid to open and close.