JP2007061692A - Disposer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposer which enables any of a normal operation and silent operation based on the user's intention and choice, and can lighten the restriction in use. <P>SOLUTION: The disposer 12 crushes and discharges garbage with a fixed blade 28 and a hammer 36 rotatably provided on a rotary plate 26 by a rotation of the rotary plate 26 by a motor 32. The disposer performs any of a normal operation mode crushing the garbage by a unidirectional high-speed rotation of the rotary plate 26, and a quiet operation mode in which a lower-speed rotation of the rotary plate 26 than that of the normal operation mode is carried out, and a positive rotation drive and a reverse rotation drive are repeated alternatively every setting time to crush the garbage, and at the same time, selects the normal operation mode or the quiet operation mode by a rotation operation of a lid 54. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a disposer for rotating and rotating a rotating plate to pulverize and discharge garbage.

2. Description of the Related Art Various types of garbage processing apparatuses for processing garbage generated in a kitchen have been proposed.
The disposer is a typical example of this. The disposer is installed under the kitchen sink and in the cabinet. The thrown garbage is ground and ground with a hammer under water supply, and the pulverized material is drained. At the same time, it is discharged from the outlet.

For example, the following Patent Document 1, Patent Document 2, Patent Document 3, and Patent Document 4 disclose such a disposer.
11 and 12 show an example of this type of disposer (the one shown is disclosed in Patent Document 1).
In FIG. 11, reference numeral 200 denotes a sink, 202 denotes a cabinet in the sink 200, 204 denotes a sink, and 206 denotes a counter. A sink faucet 208 is disposed on the counter 206.

A disposer 210 is provided below the sink 204 and in the cabinet 202 in a state of being suspended by the sink 204.
An apparatus main body 212 in the disposer 210 has a crushing chamber 216 therein as shown in FIG.

The crushing chamber 216 is provided with a cylindrical fixed blade 218 and a disc-shaped rotating plate 220.
A number of crushing holes 222 are formed in the fixed blade 218 along its peripheral wall. On the upper surface of the rotating plate 220, a hammer 224 is provided in a freely rotating state around an axis at a position eccentric from the rotating axis.

A motor 226 is directly connected to the rotating plate 220, and the rotating plate 220 is driven to rotate by the motor 226.
The apparatus main body 212 is provided with a discharge port for discharging the crushed food waste together with the waste water, and a drain pipe 228 for discharging the crushed food waste from the discharge port to the outside together with the waste water extends. I'm out.

In the disposer 210, when the rotating plate 220 is driven to rotate by the motor 226, the hammer 224 finely crushes or grinds the garbage put into the crushing chamber 216 together with the fixed blade 218 under water supply.
The crushed garbage is discharged together with water together with drainage from a large number of holes, then flows into the drainage pipe 228 from the discharge port, and is discharged outside through the drainage pipe 228.

  This disposer 210 is widely used especially in apartment buildings such as condominiums, but there is a problem that large noise and vibration are generated when the garbage is crushed by the disposer 210. Especially, the surrounding environment such as nighttime is quiet. There was a problem with restrictions on use, such as when he / she was worried about noise and vibration and hesitated to use it or stopped using it.

When the garbage 210 is pulverized by the disposer 210, particularly large noise and vibration are generated at the initial stage of pulverization in which there is a large amount of garbage in the pulverization chamber 216.
Therefore, conventionally, the rotation of the rotating plate was set to low speed at the beginning of pulverization to suppress the generation of large noise and vibration at the initial stage of pulverization, and the rotation of the rotating plate was switched to high speed in the middle after the garbage was discharged to some extent. The thing is proposed (the following patent document 5).

  However, in the disposer disclosed in Patent Document 5, the initial crushing is automatically switched to the low speed rotation and then to the high speed rotation regardless of the intention of the user, although it is not necessary to perform the low speed rotation. The low-speed rotation is automatically performed at the initial stage of pulverization, so that the efficiency of pulverization is reduced, and accordingly, the problem that the pulverization time, that is, the processing time of garbage, becomes longer, or the disposer is used at night. Even when used, the problem is that the rotational speed increases (becomes high-speed rotation) in the latter stage of pulverization, and noise and vibration are generated due to the high-speed rotation.

JP 2002-45722 A JP 2002-248368 A JP 2003-2111016 A JP 2003-305379 A Japanese Patent Laid-Open No. 10-76174

  The present invention is based on the above circumstances, and enables quiet operation according to the user's intention and selection when the surrounding environment is quiet and dislikes the occurrence of large noise and vibration. In the daytime when there is no problem even if relatively loud noise or vibration occurs, or when the surrounding environment is not quiet, the garbage should be crushed with high efficiency according to the user's intention and choice. The present invention has been made for the purpose of providing a disposer that can reduce restrictions on use.

  Thus, according to the present invention, in the disposer for rotating the rotating plate by the motor and crushing and discharging the input garbage, the control unit for controlling the operation of the motor is provided with the rotating plate in a certain direction. The normal operation mode in which the garbage is pulverized by rotating at high speed, the rotating plate is rotated at a lower speed than in the normal operation mode, and the forward rotation drive and the reverse rotation drive are alternately repeated every set time to dispose the garbage. One of the silent operation modes for crushing is executed, and selection operation means for selecting the normal operation mode and the silent operation mode by a user's operation is provided. .

  According to a second aspect of the present invention, in the first aspect of the present invention, the selection operation means is a lid that is attached to a garbage inlet, and the normal operation mode or the quiet operation mode is selected by rotating the lid. It is made to do so.

  According to a third aspect of the present invention, in the second aspect of the present invention, the normal operation mode display unit and the silent operation mode display unit that display the normal operation mode and the silent operation mode, respectively, are provided at positions on the outer peripheral side with respect to the lid. In addition, the lid is provided with an instruction section for pointing to the display sections.

  According to a fourth aspect of the present invention, in any one of the second and third aspects, when the cover is rotated to a position for selecting the normal operation mode or the silent operation mode, the position on the outer peripheral side of the cover is respectively Switch means corresponding to each of the normal operation mode and the silent operation mode in which the on operation is performed is provided.

Effects and effects of the invention

  As described above, according to the present invention, the control unit that controls the operation of the motor includes the normal operation mode in which the rotating plate is rotated at a high speed in a certain direction, the rotating plate is rotated at a lower speed, and the forward rotation driving and the reverse rotation driving are performed. The disposer is equipped with a selection operation means for selecting one of the normal operation mode and the silent operation mode by the user's operation. According to the present invention, when the user feels necessary, the operation mode can be switched to the silent operation mode based on the will, and the garbage can be pulverized, or conversely, from the silent operation mode to the normal operation mode. The garbage can be crushed by switching to.

  In other words, when it is not necessary to reduce noise and vibration, the garbage can be pulverized in the normal operation mode based on the user's choice. The grinding process can be completed in a short time.

On the other hand, when the surrounding environment is quiet, such as at night, where noise and vibration are a concern, the garbage can be crushed quietly in the silent operation mode based on the user's selection.
Thus, by allowing the user to select one, restrictions on using the disposer are eased, and the convenience of the disposer is improved.

By the way, when the rotation of the rotating plate is set to a low speed rotation in the silent operation mode, the garbage crushing ability naturally decreases.
Here, in the present invention, in the silent operation mode, the rotating plate is alternately and repeatedly rotated forward and reverse at set time intervals, and in this case, by rotating the rotating plate in the reverse direction, The crushing ability can be effectively increased, and the reduction of the crushing ability of garbage due to the low-speed rotation can be compensated for by repeatedly executing forward rotation and reverse rotation of the rotating plate.

In this case, the control unit rotates the rotating plate below the maximum number of rotations N1 set corresponding to the normal operation mode and the maximum number of rotations N2 (N1> N2) set corresponding to the silent operation mode. A number control can be performed.
In this way, in the quiet operation mode, even if the amount of garbage is reduced and the rotation speed increases in the latter stage of pulverization, the rotation speed is the upper limit rotation set to be lower than the maximum rotation speed N1 in the normal operation mode. Since it can be suppressed to N2 or less, it is possible to prevent the problem that the noise and vibration increase due to the increase in the rotational speed of the rotating plate in the latter stage of pulverization.

  In the present invention, the selection operation means is constituted by a lid attached to a garbage inlet, and either the normal operation mode or the quiet operation mode is selected by rotating the lid. (Claim 2).

  When such a selection operation means is provided, it is usually considered that a dedicated switch is provided on a counter or a wall and the operation mode is switched by operating the switch. Switching is usually performed by the user with wet hands. In this case, touching the dedicated switch with wet hands creates a risk of electric shock, or the switch becomes dirty by touching the switch with wet hands. Therefore, it is necessary to wipe this off, and eventually the user is forced to perform troublesome work.

  In addition, when grinding garbage, two operations are required: an operation to set a lid at the inlet, that is, an operation to attach the lid and an operation to operate the switch, which is troublesome in terms of workability. Will occur.

  On the other hand, according to claim 2, when the selection operation means is constituted by the lid itself attached to the insertion port, it solves both the risk of electric shock and the problem of dirt when the dedicated switch is provided. can do.

  In addition, when such a lid is configured as a selection operation means, the selection operation can be performed at the same time as the lid is set in the insertion port. Therefore, the lid can be set and the selection operation can be performed with one action. The operation for the pulverization process can be simplified, and the convenience of the disposer can be improved.

  Furthermore, when the operation mode is selected by rotating the lid, it is possible to increase the operation stroke in the direction of rotation, so the dedicated switch on / off operation as described above. Unlike the case of selection by the like, it is possible to effectively prevent an erroneous operation such that the switch is mistakenly pressed even though there is no intention.

In addition, when the operation mode is selected by rotating the lid, there is also an advantage that it is possible to immediately determine at a glance whether the current operation mode is the normal operation mode or the silent operation mode.
In this case, a normal operation mode display unit and a silent operation mode display unit for displaying the normal operation mode and the silent operation mode respectively at positions on the outer peripheral side with respect to the lid are provided, and an instruction for pointing the display unit to the lid is provided. A portion can be provided (claim 3).

In this way, it is possible to make the user more clearly recognize the current driving situation.
Further, in this case, a handle provided on the lid can be configured as the above-described instruction unit.
In such a case, the configuration of the lid can be simplified compared to the case where the instruction unit is provided separately from the handle, and the instruction unit can be configured to be larger, and the status display of the operation mode is further clarified. be able to.

  In these Claims 2 and 3, each of the normal operation mode and the silent operation mode that are turned on when the cover is rotated to the position for selecting the normal operation mode or the silent operation mode at the position on the outer peripheral side with respect to the cover, respectively. The switch means can be provided (claim 4).

Next, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 10 denotes a sink, 12 denotes a disposer provided in a suspended state on the sink 10, and 14 denotes an apparatus main body in the disposer 12.
Reference numeral 16 denotes a cylindrical casing having a radially outward flange portion 18 at the upper end, and a drain port peripheral portion of the sink 10 by the flange portion 18 and a fixing nut 20 screwed into a male screw on the outer peripheral surface. The disposer 12 is attached to the sink 10 in such a manner that the upper end inlet 21 matches the drain outlet of the sink 10.
In this embodiment, the casing 16 is divided into an upper part and a lower part, which are connected by a rubber joint 22.

A crushing chamber 24 is provided with a rotating plate 26 having a disk shape and a fixed blade 28 having a cylindrical shape on the upper side thereof.
The fixed blade 28 is provided with a large number of penetrating pulverizing holes 30 in a dispersed state, and the rotary plate 26 is connected to a drive shaft 34 of a motor 32 at the center thereof. It is designed to rotate.

A hammer 36 is provided on the upper surface and the outer periphery of the rotating plate 26.
Here, the hammer 36 is provided in a freely rotating state around an axis at a position eccentric from the rotational axis of the rotary plate 26.
In the disposer 12, the garbage introduced from the inlet 21 by the rotation of the rotating plate 26 is pulverized by a hammer 36 and a fixed blade 28 provided on the rotating plate 26 under water supply, and the crushed garbage is discharged from the outlet. 38 is discharged.

Reference numeral 40 denotes a control unit in the disposer 12, and the operation of the motor 32 is controlled by the control unit 40.
42 is a net cage having a large number of water passage holes 44 at the bottom and the peripheral wall, and has a radially outward flange 46 at the upper end, and the flange 46 is formed in the casing 16. 48 is supported.

As shown in FIG. 2, the upper portion of the casing 16 is provided with a hook-like portion 50 protruding radially inward along the inner peripheral surface thereof.
The flange portion 50 is formed with notches 52-1 and 52-2 at two locations separated by 180 ° in the circumferential direction.
In FIG. 1, 54 is a circular lid attached to the insertion port 21 and has projections 56-1 and 56-2 as shown in FIG. 2, which are notched portions 52-1 and 52-. 2 is covered from above.

The lid 54 has a recessed portion 58 that is curved and recessed downward in a dish shape, and as shown in FIG. 1, a handle 60 is provided in a form that stands upward from the bottom of the recessed portion 58. ing.
As shown in FIG. 3, the handle 60 extends in a straight line from the end of one projecting portion 56-2 to the end of the other projecting portion 56-1.

On the other hand, on the back side of the lid 54, as shown in FIG. 2, a pair of corresponding holding members 62-1 and 62-2 are provided in a fixed state at the positions of the projecting portions 56-1 and 56-2. It has been.
Each of the holding members 62-1 and 62-2 has a bifurcated tip portion, and a groove 68 is formed between the branch portions 64 and 66.
The lid 54 is held by the casing 16, that is, by the hook-shaped portion 50 by fitting the groove 68 to the hook-shaped portion 50 formed in the casing 16.

In the present embodiment, the lid 54 alternately operates the disposer 12 in the normal operation mode in which the rotating plate 26 is rotated at a high speed in one direction, and the rotating plate 26 is rotated at a low speed and the rotation driving direction is alternately set every set time. It also serves as an operation unit for selecting and operating one of the silent operation modes to be reversed.
Specifically, when the handle (instruction unit) 60 is held in the hand from the stop position shown in FIGS. 3 and 6 to the position shown in FIG. 7 and the lid 54 is rotated leftward (counterclockwise) in the figure, the normal operation mode is set. On the contrary, when this is rotated to the right (clockwise) to the position shown in FIG. 8, the silent operation mode is selected.

On the upper surface of the flange portion 18 in the casing 16, a display unit 70 (see FIG. 3) for displaying the operation position of the lid 54, that is, for displaying the stop position, and for displaying the position in the normal operation mode. A display unit 72, a display unit 74 for displaying the position of the silent operation mode, and a display unit 76 for displaying the rotation direction of the lid 54 are provided.
In addition, an instruction mark 78 is provided on the end of the handle 60 of the lid 54, specifically, on the upper surface of the end on the projecting portion 56-1, to point to the display portions.

  As shown in FIGS. 3 and 4, a lid 54 is provided on the casing 16, more specifically, a lead that is turned on when the handle 60 is rotated leftward from the stop position of FIG. 3 to the position of the normal operation mode. A switch 80-1 is provided, and a reed switch 80-2 that is turned on when the handle 60 is rotated by a certain angle in the opposite direction to reach the silent operation mode position is provided.

On the other hand, in detail, on the lid 54, a magnet 82 (see FIG. 3B) is embedded in the holding member 62-1 on the projecting portion 56-1 side as an operation portion for turning on each reed switch.
That is, when the handle 60 of the lid 54 is rotated to the left in the drawing to the position of the normal operation mode, the magnet 82 is just opposite to the reed switch 80-1 as shown in FIG. 1 is turned on by the magnet 82, and the disposer 12 executes the normal operation mode based on the switch signal.

Conversely, when the handle 60 is rotated to the right in the drawing to the position of the silent operation mode, the magnet 82 faces the reed switch 80-2 as shown in FIG. 80-2 is turned on, and the disposer 12 executes the silent operation mode based on the switch signal.
The control unit 40 is connected to the reed switches 80-1 and 80-2, and switch signals from the reed switches 80-1 and 80-2 are input to the control unit 40.

  The upper portion of the casing 16 also has a limit switch 84-1 as a mechanical switch at a position just 180 ° away from the reed switch 80-1, and a mechanical switch at a position 180 ° away from the reed switch 80-2. Limit switches 84-2 are provided, and these limit switches 84-1 and 84-2 are mechanically pushed by the branching portion 66 of the lid 54 shown in FIG. 2 (see FIG. 5B). Each is turned on. That is, in this embodiment, the branching portion 66 of the holding member 62-1 in the lid 54 is configured as an operating portion of each limit switch 84-1 and 84-2.

In this embodiment, as shown in FIG. 7, when the handle 60 of the lid 54 is rotated to the left in the drawing to the position of the normal operation mode, the reed switch 80-1 and the limit switch 84-1 are turned on simultaneously. It operates, and the switch signal from each is input into the control part 40. FIG.
Further, as shown in FIG. 8, when the handle 60 of the lid 54 is rotated rightward in the drawing to the position of the silent operation mode, the reed switch 80-2 and the limit switch 84-2 are simultaneously turned on, Is input to the control unit 40.
In the present embodiment, as described above, when the handle 60 of the lid 54 is rotated to the left in the drawing and the normal operation mode is selected, the control unit 40 rotates the rotating plate 26 in one direction at a high speed to make garbage. The normal operation mode for crushing is performed.

FIG. 9A shows the relationship between the rotational speed of the rotating plate 26 and the time from the start of startup in this normal operation mode.
As shown in the figure, in this normal rotation mode, the rotation speed of the rotating plate 26 increases with the elapse of time after the start of startup, and reaches approximately 2600 rpm in about 20 seconds.

In this embodiment, the maximum number of rotations N1 of the rotating plate 26 is set to 2600 rpm. Therefore, when the number of rotations of the rotating plate 26 reaches 2600 rpm, the limiter operates to suppress further increase in the number of rotations.
Here, the control of the rotational speed of the rotating plate 26, that is, the control of the rotational speed of the motor 32 is performed by controlling the motor voltage supplied to the motor 32.
The number of rotations can be detected by detecting the current of the motor 32, or alternatively, by generating a pulse based on the rotation of the rotating plate 26 (or the motor 32) and detecting the pulse. it can.

On the other hand, FIG. 9B shows the relationship between the rotational speed of the rotating plate 26 and the elapsed time after activation when the silent operation mode is selected.
Here, the rotating plate 26 is driven to rotate forward for a set time (for example, 10 seconds), and then after a minute time (for example, 1 second), the rotating plate 26 is driven to rotate backward.
Then, with this as one cycle, the same operation is repeated.

Here, the maximum number of rotations is 1500 rpm in both the forward rotation drive and the reverse rotation drive. That is, when a rotational driving force is applied in the forward rotation direction or the reverse rotation direction for 10 seconds, the peak rotational speed is just 1500 rpm which is the maximum rotational speed N1 set.
Therefore, in this embodiment, in the quiet operation mode, the increase in the rotational speed is not particularly suppressed by the limiter.
However, when the rotational speed exceeds 1500 rpm by rotational driving every 10 seconds, the maximum rotational speed N1 set at the peak rotational speed by setting a limiter is set to 1500 rpm, and the rotational speed of the rotating plate 26 is always lower than that. It is also possible to control as described above.

FIG. 10 shows an example in which a limiter is provided and the peak rotational speed is forcibly suppressed to 1500 rpm or less of the maximum rotational speed N1.
In the operation mode shown in FIG. 10, the rotation speed of the rotating plate 26 does not become so high at the initial stage of pulverization due to a large amount of garbage in the pulverization chamber 24. The rotational speed gradually increases and finally reaches the rotational speed of 1500 rpm.
At this time, the limiter works to suppress further increase in the rotational speed.

In the present embodiment, the garbage can be pulverized by attaching the lid 54 from the upper side while the net cage 42 is set.
For this reason, there is no trouble in the place of the net 42 when the disposer 12 is used, and the popping out of the garbage input 21 due to the remaining rotation immediately after opening the lid 54 is caused by the screen action of the net 42. Can be prevented.
Furthermore, there is also an advantage that an accident that a spoon or the like is erroneously inserted from the insertion port 21 at the time of the remaining rotation immediately after the lid 54 is opened can be prevented by the mesh cage 42.

  As described above, in the present embodiment, when the user feels necessary, the operation mode can be switched to the silent operation mode based on the will, and the garbage can be crushed, or conversely, the normal operation can be performed from the silent operation mode. The operation mode can be switched to grind the garbage.

  Further, in the present embodiment, in the silent operation mode, the rotating plate 26 is alternately and repeatedly rotated forward and reverse at set time intervals. In this case, the garbage is generated by reversing the rotating direction of the rotating plate 26. The crushing ability can be effectively increased, and the reduction of the crushing ability of the garbage due to the low-speed rotation can be compensated for by repeatedly performing the forward rotation drive and the reverse rotation drive of the rotating plate 26.

  Furthermore, in the present embodiment, since the control unit 40 controls the rotational speed of the rotating plate 26 below the maximum rotational speeds N1 and N2, in the quiet operation mode, the amount of garbage is reduced and the latter half of the period. Even if the number of revolutions increases, the number of revolutions is suppressed to the upper limit number of revolutions N2 set lower than the maximum number of revolutions in the normal operation mode, and noise and vibration are caused based on the increase in the number of revolutions of the rotating plate 26 in the latter stage of crushing. There is no problem of increasing the size.

  Further, in this embodiment, since the operation mode selection operation means is constituted by the lid 54 attached to the garbage input port 21, a switch for switching the operation mode is provided on a normal counter or wall. In this case, it is possible to solve both of the dangers of electric shock caused by operating with wet hands and the problem of contamination of the switch.

  Further, since the selection operation can be performed at the same time when the lid 54 is set in the insertion port 21, the lid 54 can be set and selected by one action, and the work for pulverizing the garbage can be easily performed. Therefore, it is possible to improve the usability of the disposer 12.

  Furthermore, since it is possible to take a large operation stroke in the rotational direction, there is no problem of erroneous operation despite the lack of intention as in the case of pressing a dedicated switch.

  In the present embodiment, a display unit 72 and a display unit 74 for displaying the normal operation mode and the silent operation mode are provided at positions on the outer peripheral side with respect to the lid 54, respectively, and a display 60 is provided with a handle 60 provided on the lid 54. Since the indicator 72 points to the parts 72 and 74, the current driving situation can be clearly recognized by the user, and in addition to the case where the indicator 60 is provided separately from the handle 60, the lid The configuration of 54 can be simplified, and the instruction unit can be configured to be larger, so that the status display of the operation mode can be further clarified.

  Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be configured in various forms without departing from the spirit of the present invention.

It is a partially notched front view which shows the disposer of one Embodiment of this invention. It is a figure which expands and shows the principal part of the embodiment. It is the top view of the state which mounted | wore the disposer of the same embodiment, and the figure of a lid | cover simple substance. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is a figure which shows the VV principal part cross section of FIG. 3 with a limit switch. It is a figure of the operation stop state of the disposer of the embodiment. It is a figure when the normal operation mode is selected from FIG. It is a figure when the quiet operation mode is selected from FIG. It is the figure which showed the relationship between the rotation speed of the rotating plate in the same embodiment, and the time from starting start. It is the figure which showed the relationship between the rotation speed of the rotating plate in other embodiment, and the time from starting start. It is a figure which shows the conventional disposer with a sink. FIG. 12 is a partially cutaway perspective view of the disposer of FIG. 11.

Explanation of symbols

12 Disposer 21 Loading Port 26 Rotating Plate 28 Fixed Blade 32 Motor 40 Control Unit 54 Lid 60 Handle (Instruction Unit)
72, 74 Display section 78 Instruction mark 80-1, 80-2 Reed switch

Claims (4)

In a disposer that rotates a rotating plate with a motor and crushes and discharges the input garbage, a control unit that controls the operation of the motor is usually used to rotate the rotating plate at a high speed in a certain direction to pulverize the garbage. Execute either the operation mode or the quiet operation mode in which the rotating plate is rotated at a lower speed than the normal operation mode and the forward rotation drive and the reverse rotation drive are alternately repeated every set time to pulverize the garbage. A disposer characterized by comprising a selection operation means for selecting the normal operation mode and the silent operation mode by a user operation.   In Claim 1, the said selection operation means is a lid | cover with which the insertion opening | mouth of garbage is attached, and it is made to select either the said normal operation mode and a quiet operation mode by rotation operation of this lid | cover. Disposer characterized by.   In Claim 2, the normal operation mode display part and the quiet operation mode display part which display the normal operation mode and the silent operation mode respectively at a position on the outer peripheral side with respect to the lid are provided, and the lid has A disposer characterized in that an instruction unit pointing to the display unit is provided.   In any one of Claims 2 and 3, the position on the outer peripheral side with respect to the lid is a normal operation mode in which the lid is turned on when the lid is rotated to a position for selecting the normal operation mode or the silent operation mode. Disposer characterized in that switch means corresponding to each quiet operation mode is provided.

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