JPH0349428Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a lid opening/closing mechanism for the operation panel of equipment, and in particular to a device that opens the lid that covers the equipment's operation panel when not in use, when the equipment is in use. This invention relates to a lid opening/closing mechanism for an operation panel.

Some electrical devices have a structure in which a lid covers a front operation panel when not in use, and the lid rotates and is stowed away on the bottom side of the electrical device when in use.

When the lid rotates in this way, there is a risk of fingers getting caught between the lid and the stand on which the equipment is placed when the lid opens, and when the lid closes, there is a risk of getting your fingers caught between the lid and the stand on which the device is placed. There is a risk of it getting caught between the panel and the panel. If your finger is actually caught, the pain will be greater if your finger is caught during the opening process than during the closing process, due to the angle of the lid. Furthermore, fingers are likely to get caught when the lid is opened.

The rotating mechanism for rotating the lid has a friction clutch in the middle that functions as a torque limiter.

To reduce finger pain when fingers are pinched,
It is desirable that the maximum transmission torque of the sliding friction clutch is lower during the opening process than during the closing process.

Further, the opening operation is performed by rotating the lid in the direction of gravity, and the torque required is less than that required during the closing operation in which the lid is rotated against gravity.

BACKGROUND OF THE INVENTION In general, the maximum transmission torque of a friction clutch is determined in accordance with the lid closing operation.

The conventional lid opening/closing mechanism has a structure in which the maximum transmission torque of the friction clutch of the rotation mechanism when the lid is opened is the same as when the lid is closed.

For this reason, if you pinch your finger when opening the lid, it will cause severe pain.
There was a problem that it could cause injury to the fingers.

The object of the present invention is to provide a lid opening/closing mechanism for an operation panel of a device that solves the above-mentioned problems.

Means for Solving the Problems The present invention provides a lid that is rotatable between a closed position that covers the front operation panel of a device and an open position that faces the bottom of the device; In an operation panel lid opening/closing mechanism comprising a rotation mechanism for rotating the body between the closed lid position and the open lid position, the rotation mechanism is replaced by a worm gear mechanism comprising a motor, a worm, and a worm wheel. a rotating body provided coaxially with the worm on a fixed shaft supporting the worm and rotated by the motor; a spring member biasing the rotating body toward the worm; A friction clutch formed between the worm and the worm makes the worm movable in the axial direction about the fixed shaft, and the direction of rotation of the worm during the lid opening operation is changed from the axial direction acting on the worm. The structure is such that the force is directed in the opposite direction to that of the rotating body.

Effect: The maximum transmittable torque of the friction clutch during the lid opening operation can be set to a small value determined by the spring member. Therefore, even if a finger is accidentally caught in the lid during opening, the pain in the finger can be reduced and injury to the finger can be prevented.

Embodiment FIG. 1 shows a lid opening/closing mechanism for an apparatus operation panel according to an embodiment of the present invention.

FIG. 2 shows the lid closed state, and FIG. 3 shows the lid open state.

FIG. 4 to FIG. 7 are diagrams for explaining the lid opening operation.

In FIGS. 1 to 3, numeral 10 represents an electrical device.
11 is the front operation panel, and various operation buttons 1
2 is placed. Reference numeral 13 denotes the bottom surface near the operation panel, and the lid body is opposed to and stowed away here. With the device 10 placed on the stand 9, the bottom surface 1
3 is spaced apart from the stand 9, and a space 8 is formed between the bottom surface 13 and the stand to accommodate the lid main body. 14 is a corner formed by the operation panel 11 and the bottom surface 13.

Reference numeral 15 denotes a lid, which consists of a lid main body 16 and arms 17 (one of which is not shown) at both ends of the lid in the longitudinal direction. A shaft 18 is implanted in the middle of the arm 17, and a hole 17a is formed at the tip.

19 is a bracket, which is attached to the side surface 20 of the device 10;
It is fixed inside.

Reference numeral 21 denotes a long hole, which is formed to extend horizontally in different stages on the bracket 19, and rotatably and movably supports the shaft 18.

P ₁ , P ₂ , and P ₃ are positions in the elongated hole 21, respectively. P ₁ is the closest position to the corner 14, P ₃ is the farthest position from the corner 14 and the operation panel 11, and P ₂ is the intermediate position.

The lid body 15 is supported by fitting a shaft 18 into an elongated hole 21.

Reference numeral 30 denotes a rotation mechanism, which includes a motor 31, a worm gear mechanism 32, a gear 33, and a rotation arm 34. These are all attached to the bracket 19 mentioned above.

The gear 33 and the rotating arm 34 are connected to the bracket 1
It is rotatably supported on the shaft 35 on the top 9 and rotates integrally. The position of the shaft 35 is determined at a predetermined position with respect to the elongated hole 21.

A pin 36 is implanted at the tip of the rotating arm 34, and this pin 36 fits into the hole 17a.

Next, the opening/closing operation of the lid body 15 will be explained with reference to FIGS. 4 to 7.

Initially, the rotating arm 34 is in the rotating position _S1 shown in FIGS. 1 and 4, and the lid 15 is in the rotating position S1 shown in FIGS.
The operation panel 1 is in the rotational position shown in Figures 4 and 4.
It covers 1.

When the electric device 10 is used, when the button 40 is operated, the rotation mechanism 30 is operated. That is, the motor 31 starts and rotates forward, and the worm gear mechanism 32
, the gear 33 rotates clockwise as shown by arrow B. Rotating arm 34 integrated with gear 33
rotates.

By rotating the rotating arm 34 from S ₁ to S ₄ ,
The lid body 15 moves in the directions of arrows X ₁ and X ₂ on the shaft 18 and rotates counterclockwise as shown by arrow A, passing through the states shown in FIGS. 5 and 6 on the way, and finally ,
As shown by the two-dot chain line in Figure 1 and the solid line in Figure 7,
It is stored on the bottom surface 13 side and the lid is opened.

When the button 40 is operated again after using the device 10, the motor 31 is started and reversed, and the arm 34 is rotated counterclockwise as indicated by arrow A. The lid body 15 rotates clockwise as shown by arrow B in the reverse order from when the lid is opened, and covers the operation panel 11 as shown in FIGS. 1, 2, and 4.

Next, the rotation mechanism 30 will be explained.

FIG. 8 shows the state when the lid is opened, FIG. 9 shows the state when the lid is closed, and FIG. 10 shows the friction clutch.

The worm 50 and the worm wheel 51 constitute the worm gear mechanism 32.

The worm 50 is rotatably mounted on a shaft 52 fixed to the bracket 19 and movable within a predetermined range in the axial direction.

A pulley 53 and a spring receiving member 54 as rotating bodies are rotatably provided on the shaft 52, respectively.

55 is a coil spring, which is compressed and is applied to the pulley 5.
3 and the spring receiving member 54. The pulley 53 and the spring receiving member 54 have teeth 53a and 54.
a is engaged with the spring receiving member 54, even if the distance between the spring receiving member 54 and the pulley 53 changes,
Rotates integrally with 3. The coil spring 55 also rotates integrally with the pulley 53 and the spring receiving member 54.

A circular rubber plate 56 is fitted onto the shaft 52 and is provided between the end surface 53a of the pulley 53 and the flange 50a at the end of the worm 50.

Rubber plate 56, pulley 53, flange 50a,
The coil spring 55 and the spring receiving member 54 constitute a friction clutch 57.

This friction clutch 57 functions as a torque limiter as will be described later. The maximum torque that can be transmitted by the friction clutch 57, that is, the torque that starts slipping, in other words, the set value as a torque limiter is determined by the spring force of the coil spring 55.

When the lid is opened, the motor 31 is activated as shown in FIG.
rotates clockwise, the pulley 53 is driven by the belt 58 and rotates in the same direction, and the friction clutch 5
7, the worm 50 rotates clockwise as shown by arrow C, and the worm wheel 51 rotates in the direction shown by arrow D.
Rotate counterclockwise as shown.

As a reaction force that rotates the worm wheel 51, a force in the direction of arrow E acts on the worm 50,
The worm 50 is moved downward and rotates.

At this time, the maximum torque that can be transmitted by the friction clutch 57, that is, the torque that starts slipping, in other words, the set value T ₁ (11th
(see line a in the figure) is determined by the spring force F of the upper coil spring 55, and is approximately 40 g·cm, which is smaller than the set value T ₂ when the lid is closed, which will be described later.

If a finger 59 is caught between the lid main body 16 and the stand 9 while opening the lid, as shown in FIG. 1, the load on the filter motor 31 increases. When the transmitted torque exceeds the set value _T1 , the friction clutch 57 starts to slip and the movement of the lid body 16 stops.

Here, since the set value T ₁ is small, the movement of the lid main body 16 stops before the finger 59 is strongly pinched, and the finger 59 stops moving.
Accidents that would injure 9 will be prevented.

When the lid is closed, the motor 31 is turned on as shown in FIG.
rotates counterclockwise, belt 58, pulley 5
3. The worm 50 is rotated counterclockwise as shown by arrow G via the friction clutch 57, and the worm wheel 51 is rotated clockwise as shown by arrow H.

A force in the direction of arrow I acts on the worm wheel 50 as a reaction force to rotate the worm wheel 51,
The worm 50 is moved upward and rotates.

At this time, the set value T ₂ of the friction clutch 57 (first
1) is determined by the upward force J of the worm 50. This force J is the above spring force F
The pulley 53 becomes a force exceeding the spring receiving member 5.
4, and the set value _T2 becomes larger than the set value _T1 .

Next, a circuit for controlling the operation of the lid opening/closing mechanism will be explained with reference to FIG. 12.

In the figure, 60 is a motor control section. SW ₁ is a limit switch, and as shown in FIG. 1, it is attached to the gear 33.

SW ₂ is a lid open position detection switch, and SW ₃ is a lid open position detection switch, which are attached to the bracket 19 as shown in FIG.

65, 66, 67, 68 are and gates, 7
0, 71, and 72 are inverters.

In the closed state of Figure 1, switch SW ₁ is on;
Switch SW ₂ is on and switch SW ₃ is off.

By operating the button 40, a clockwise rotation command is input to the motor control section 60 from the terminal 61.

Upon receipt of this command, the motor control section 60 starts the motor 31 to rotate it clockwise, and also starts the timer 62. timer 62
is set to a time somewhat longer than the time normally required for the lid opening operation.

When the motor 31 starts and the rotating arm 34 rotates clockwise to start the lid opening operation, the switch is activated.
Both SW ₁ and SW ₂ are turned off.

The rotating arm 34 is rotated within the time set by the timer 62.
When S ₄ is reached, when the rotating arm 34 reaches S ₄ and is pushed by the rotating arm 34 and switch SW ₃ is turned on, a signal is output from the AND gate 67 and the motor controller 60, and the motor control section 60 stops the motor 31. Thereby, the lid body 15 is placed in the open state shown in FIG. 3.

When the finger 59 is pinched as described above, the set time of the timer 62 elapses before the switch SW ₃ is turned on. AND gate 68 when the set time elapses
A signal is outputted and supplied to the terminal 60b, and the motor control unit 60 reverses the motor 31. Thereby, the lid body 15 is returned to the closed state shown in FIG. 2. As a result, the finger 59 is released from the pinched state.

In the open state shown in Figure 7, switch SW ₃ is on.
Switches SW ₁ and SW ₂ are in the off state.

When the button 40 is operated, a counterclockwise rotation command is received from the terminal 62, and the motor control unit 60 controls the motor 3.
Start 1 and rotate it counterclockwise.

When the motor 31 starts and the rotating arm 34 rotates counterclockwise to start the lid closing operation, the switch is activated.
SW ₃ is turned off.

When the rotating arm 34 reaches _S1 , the switch _SW2 is pushed and turned on, and then the gear 33 rotates independently of the rotating arm 34, and the switch _SW1 moves and hits the pin 54, and the switch SW2 is turned on. ₁ is turned on.
At this point, a signal is output from the AND gate 65, which is applied to the motor control unit 60 from the terminal 60a, and the motor control unit 60 stops the motor 31. Thereby, the lid body 15 is placed in the closed state shown in FIG. 2.

For example, if your finger is caught between the lid body 16 and the operation panel 11, switch SW ₂
switch SW ₁ is turned on when is off. In this case, a signal is output from the AND gate 66, which is applied to the motor control unit 60 from the terminal 60b, and the motor control unit 60 reverses the motor 31. As a result, the lid-closing operation is reversed and the lid-opening operation is performed, and the fingers are released.

Effects of the invention As explained above, according to the invention, the maximum transmission torque of the friction clutch during the lid opening operation can be set to a relatively small value determined by the spring member without being affected by the axial force generated in the worm. It can be done. For this reason, it is possible to reduce the pain to the finger when the finger is accidentally caught by the lid body while opening the lid, and has the feature that it is possible to prevent an accident in which the finger is injured.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a lid opening/closing mechanism for an operation panel of a device according to an embodiment of the present invention;
The figures are perspective views showing the closed and open states of the lid, respectively. Figures 4 to 7 are diagrams illustrating the movement of the lid during the opening operation, and Figures 8 and 9 are respectively. A diagram showing a part of the rotation mechanism during the lid opening operation and the lid closing operation,
Fig. 10 is an exploded perspective view of the friction clutch part in Fig. 8, Fig. 11 is a diagram showing the maximum transmission torque of the friction clutch when the lid is opened and closed, and Fig. 12 is an operation control of the lid opening/closing mechanism. It is a circuit diagram of a circuit. 10...Electrical equipment, 11...Operation panel, 12
...Operation button, 13...Bottom surface, 15...Lid body, 16
... Lid body, 17 ... Arm, 17a ... Hole, 18
...Axis, 19...Bracket, 20...Side, 2
1... Elongated hole, 30... Rotating mechanism, 31... Motor, 32... Worm gear mechanism, 33... Gear,
34... Rotating arm, 35... Axis, 36... Pin, 50... Worm, 50a... Flange, 5
1... Worm wheel, 52... Axis, 53...
Pulley, 53a, 54a... tooth portion, 53b... end face, 54... spring receiving member, 55... coil spring, 56... rubber plate, 57... friction clutch.

Claims (1)

[Scope of Claim for Utility Model Registration] A lid that is rotatable between a closed position that covers the front operation panel of the device and an open position that faces the bottom of the device; A lid opening/closing mechanism for an operation panel that includes a rotation mechanism that rotates between a lid position and an open lid position, wherein the rotation mechanism is combined with a worm gear mechanism that includes a motor, a worm wheel, and a worm wheel. a rotating body that is provided coaxially with the worm on a fixed shaft that supports the worm and is rotated by the motor; a spring member that biases the rotating body toward the worm; A friction clutch formed between the worm and the worm makes the worm movable in the axial direction about the fixed shaft, and the axial force acting on the worm changes the direction of rotation of the worm during the lid opening operation. A lid opening/closing mechanism for an equipment operation panel configured to face in the opposite direction to the body.