JP2017104373A - Electric cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric cooker with high level of safety taken into consideration so that a harmful effect due to reaction occurring upon rotation start of a motor is not generated.SOLUTION: An electric cooker 100 is provided which comprises: a main body part 10 comprising a motor, a drive shaft 16 rotated by the motor, and a motor control part for controlling rotation of the motor; and a work 24 attached to the drive shaft, rotating with the drive shaft and cooking a cooked object, and in which a user grips the main body part to perform cooking. The motor control part performs a rotation control in which a previous step of rotating the motor at low speed for a constant period is performed upon rotation start of the motor, then transitions to a main step of rotating the motor at the prescribed number of revolutions.SELECTED DRAWING: Figure 1

Description

  The present application relates to an electric cooker that rotates a drive shaft by a motor, and agitates and cuts an object to be cooked using a workpiece that rotates together with the drive shaft. It relates to the electric cooker.

  As an electric cooker used at home, a cutter placed at the center of a cooking container is rotated by a motor to cut, pulverize, or agitate various items to be cooked in the cooking container. Various devices called juicers, mixers, and food processors have been put into practical use. In addition, a handy type electric cooker in which the user holds the main body portion in which the motor is housed by hand and uses the front end portion of the drive shaft downward is also widely used.

  These handy-type electric cookers, called handy blenders, handy mixers, etc., in recent years, by replacing the attachment attached to the tip of the main body, not only frothing and stirring, knead bread dough, vegetables It has been put to practical use that can handle many cooking menus, such as chopping meat and meat.

  When the attachment as a blender that stirs the ingredients in the bowl or cup is attached as the attachment attached to the tip of the main body of the handy type electric cooker, the tip of the attachment is an open surface Therefore, when the electric cooking device is viewed from the front end side, the blender cutter as a workpiece is directly visible.

  With the attachment as a blender installed in this way, the electric cooker lowers the tip to avoid the risk that the blender cutter will rotate if the switch of the electric cooker is accidentally operated. When the cooking posture is not correct toward the side, a safety measure has been proposed in which the motor does not rotate even when the switch is operated (see Patent Document 1).

JP 2006-325920 A

  In the conventional electric cooker, it is possible to effectively prevent an undesired situation in which the rotating blender cutter is injured.

  However, in the hand-held electric cooker, a new problem that the reaction of the torque by the motor at the start of rotation immediately after operating the switch places a heavy burden on the user holding the electric cooker is problematic. It came to be.

  In particular, users who use handheld electric cookers at home are often women with weak grip, and if the reaction of torque by the motor at the start of rotation is large, the user is holding the wrist holding the electric cooker. It is also assumed that it hurts or the electric cooker is dropped. However, a conventional electric cooker has not been proposed in which countermeasures against adverse effects due to the reaction at the start of the rotation of the motor have been proposed.

  The present disclosure solves such a new problem, and in a handy-type electric cooker, even if the user to use is a woman with weak gripping force, it has an adverse effect due to the reaction at the start of rotation of the motor. This is to realize an electric cooker with higher considerations in terms of safety.

  In order to solve the above problems, an electric cooking device disclosed in the present application includes a motor, a drive shaft rotated by the motor, a main body having a motor control unit that controls rotation of the motor, and the drive shaft. An electric cooker that is attached and rotates together with the drive shaft to cook an object to be cooked, and in which a user grips the main body to perform cooking, and the motor control unit rotates the motor At the start, a rotation control is performed to shift to the main process of rotating the motor at a predetermined rotational speed after passing through a pre-process for rotating the motor at a low speed for a certain period.

  The electric cooker disclosed in the present application controls the motor control unit so that the process proceeds to this step after passing through the previous step of rotating at a low speed at the start of rotation of the motor. The recoil can be reduced. For this reason, even when a user with weak gripping force is gripping the main body, it is possible to effectively avoid the adverse effect of hurting the wrist due to the reaction of the rotation of the motor.

It is a disassembled perspective view which shows the shape of the handy blender concerning embodiment. It is a figure explaining the condition of the cooking in the state where the attachment which is a blender was equipped. It is a figure explaining control of the motor rotation speed in the handy blender concerning an embodiment. In the handy blender concerning an embodiment, it is a figure explaining the effect which prevents scattering of a to-be-cooked object at the time of performing rotation control which provided the previous process. FIG. 4A shows the case where the rotation control having the previous process is performed, and FIG. 4B shows the case where the rotation control without the previous process is performed. It is a figure explaining control of the motor rotation number at the time of using the AC motor in the handy blender concerning an embodiment. FIG. 5A shows a state of rotating at a relatively low speed, and FIG. 5B shows a state of rotating at a relatively high speed. It is a figure explaining the different control pattern of motor rotation speed control in the handy blender concerning an embodiment. It is a figure explaining the further different control pattern of motor rotation speed control in the handy blender concerning an embodiment. It is a disassembled perspective view explaining the structure of the attachment with a container with which the handy blender concerning embodiment is mounted | worn. It is a figure explaining the condition of the cooking in the state where the attachment with a container was equipped.

  An electric cooker disclosed in the present application is attached to the drive shaft with a motor, a drive shaft that is rotated by the motor, and a motor control unit that controls the rotation of the motor, together with the drive shaft A cooker that rotates and cooks an object to be cooked, and a user grips the main body to perform cooking, and the motor control unit is configured to perform a predetermined period of time at the start of rotation of the motor. After passing through the pre-process which rotates a motor at low speed, the rotation control which transfers to this process which rotates the said motor by predetermined rotation speed is performed.

  The electric cooker according to the present disclosure has the above-described configuration, and the motor control unit rotates the motor so as to pass through a pre-process for rotating the motor at a low speed before the main process for rotating the motor at a predetermined rotation speed. Control. For this reason, even when the user grips the main body with the electric cooker floating in the air, it is possible to reduce the reaction of the torque generated at the start of the rotation of the motor, and the user's wrist is burdened. It can be avoided. Moreover, since the workpiece | work rotating with a drive shaft starts rotation from low speed, it can suppress that a to-be-cooked material scatters around by centrifugal force.

  In the electric cooking device according to the present disclosure, the motor control unit can perform rotation control for continuously increasing the number of rotations of the motor in the previous step. Further, the motor control unit can perform rotation control that increases the number of rotations of the motor stepwise in the previous step. By doing in this way, the type and amount of the food to be cooked in bringing the motor rotation speed close to the predetermined rotation speed in this process within the period of the previous process where the motor rotation speed is low relative to this process. Depending on the shape of the workpiece and the like, it is possible to realize the rotational speed control in the previous process with a more preferable pattern.

  Moreover, it is preferable that the period of the said previous process is 3 second or less.

  Furthermore, in the electric cooking device according to the present disclosure, a plurality of types that can be attached to the front end of the main body unit having a rotating shaft that rotates as the driving shaft rotates and the workpiece that is attached to the rotating shaft. It is preferable that a plurality of types of the workpieces are attached in a replaceable manner by replacing the attachment. By doing in this way, the electric cooker which can select a suitable workpiece | work according to the cooking content and can perform many types of cooking is realizable.

  In this case, when the attachment with a container in which the work is rotatably arranged is installed inside the cooking container capable of storing the food to be cooked, the motor control unit performs the preceding process as the attachment. It is preferable to perform rotation control that shifts to the main step. In the case of an attachment with a container, cooking is performed by placing the electric cooker on a kitchen table or the like, and therefore, there is no adverse effect as in the case of cooking only by grasping the main body.

  Further, the apparatus further includes a detection unit capable of detecting the type of the attached attachment, and the motor control unit is based on a detection signal indicating that the attachment with a container output from the detection unit is attached. It is preferable to automatically perform rotation control that shifts to the main step without going through the previous step. By doing in this way, rotation control of suitable motor can be performed, without a user adjusting according to the kind of attachment.

  Hereinafter, the electric cooking device disclosed in the present application will be described with reference to the drawings while showing specific examples.

(Embodiment)
Hereinafter, as an embodiment of the electric cooking device disclosed in the present application, a handy type blender capable of attaching various types of workpieces to the drive shaft in an exchangeable manner will be described as an example.

  The handy blender exemplified in the present embodiment can be attached to the tip of the main body so that the attachment can be replaced, and by changing the attachment, various workpieces attached to the rotating shaft inside the attachment can be selected and changed. Various kinds of cooking can be performed by stirring, cutting, and the like.

  In addition, the handy blender exemplified in the present embodiment stirs, shreds, etc. the cooking object with a rotating work by inserting the tip into a cup containing the cooking object as an attachment that can be attached to the main body. An attachment as a blender, a cooking container that can accommodate the food to be cooked inside, and an attachment with a container that can be used for various types of cooking with a work that rotates in the cooking container can be mounted interchangeably. is there.

<Configuration of handy blender>
FIG. 1 is an exploded perspective view showing the configuration of the handy blender according to the present embodiment.

  As shown in FIG. 1, the handy blender 100 according to the present embodiment includes a main body 10 and an attachment 20 that can be attached to the tip of the main body 10. In FIG. 1, the attachment 20 attached to the tip of the main body 10 is provided with a stirring wing (blender blade) that stirs and shreds the liquid in the cup or a relatively soft food as a workpiece. Show.

  As shown in FIG. 1, the main body 10 of the handy blender 100 has a substantially cylindrical shape as a whole. In FIG. 1, which is illustrated according to the vertical direction in a state where the user actually uses cooking, an operation button 11 is disposed on the side surface of the upper portion of the main body 10. In the handy blender 100 of the present embodiment, the operation button 11 is composed of two buttons, an upper button 11a and a lower button 11b arranged in the vertical direction.

  The main body 10 of the portion where the operation button 11 is arranged is a small-diameter portion 12 configured such that the side surface portion on the side opposite to the side where the operation button 11 is arranged is gradually recessed upward. Then, the user performs cooking while holding the small-diameter portion 12.

  Below the small-diameter portion 12 is a large-diameter portion 13 configured with substantially the same diameter, and a motor (not shown) is accommodated in the large-diameter portion 13. In the handy blender 100 of the present embodiment, the user places the main body 10 by placing a heavy motor in the large-diameter portion 13 positioned below the small-diameter portion 12 held by the user during cooking. It can be held in a stable posture. However, in the handy blender 100 according to the present embodiment, the motor is disposed below the portion of the main body 10 that is gripped by the user, and is not essential, and the user grips the portion where the motor is disposed. Various other arrangements can be adopted such as a configuration.

  The lower end portion, which is the distal end portion of the main body 10, is a mounting portion 14 to which the attachment 20 is mounted. In the main body portion 10 of the handy blender 100 of the present embodiment, the first diameter small portion 14a having a smaller diameter than the large diameter portion 13 and the second diameter small portion 14b having a smaller diameter than the first diameter small portion 14a form a stepped portion. And the mounting portion 14 is configured.

  On the side surface of the second small diameter portion 14b, a convex portion 15 formed in a helical shape that is used when the attachment 20 is screwed is formed. Further, the tip end portion of the drive shaft 16 that is rotated by the motor is disposed at the tip end portion of the second small diameter portion 14b. The front end portion of the drive shaft 16 is formed in a circular shape having a predetermined area. When the attachment 20 is mounted, the drive shaft 16 is fitted with an upper end portion of a rotation shaft 23 in the attachment, which will be described later, so that rotation can be transmitted. It is formed as a surface having

  A rotation switch 17 is arranged at the upper end portion of the main body 10 so that the user can select a motor rotation number suitable for cooking contents by rotating the user. Note that the diameter of the rotary switch 17 is formed larger than the diameter of the small-diameter portion 12 so that the user can easily perform the rotation operation, and the user's wrist when the small-diameter portion 12 is gripped. It is considered that the user can easily hold the handy blender 100 by placing the rotary switch 17 on the upper surface side of the handheld blender.

  From the upper end surface of the main body 10, a power cord 18 that supplies power for rotating a motor disposed inside the main body 10 extends upward. Furthermore, a hanging hook 19 in which a hook hole is formed is formed upward from the upper end surface of the main body 10 so that it can be hooked on the protruding member when the handy blender 100 is stored. .

  Note that a control circuit board (not shown) is disposed in a predetermined position inside the main body 10, for example, in the small diameter portion 12 where the operation switch 11 is formed on the surface thereof. The control circuit board is mounted with a control circuit that constitutes a motor control unit that rotates the motor at a predetermined rotation speed in response to a user operation from the operation switch 11 or the rotation switch 17.

  In the electric cooking device according to the present disclosure, the motor control unit performs rotation control in a previous process with a small number of rotations before the main process of rotating the motor at a predetermined rotation number. The motor control unit that performs such a function can be realized by a microcomputer, a known logic circuit, or the like. In addition, control of the motor rotation speed by the motor control unit in the handy blender 100 according to the present embodiment will be described in detail later.

  A control circuit board on which a control circuit is mounted, a power circuit board (not shown) on which a power circuit for using power from a commercial power source obtained via the power cord 18 as an operating power source in the handy blender 100 is mounted, and an operation switch 11 Various electric circuit boards such as an operation switch circuit board (not shown) on which circuit parts for receiving the operation are mounted and a rotation switch circuit board (not shown) on which the circuit parts for receiving the operation of the rotary switch 17 are mounted are respectively separate circuit boards. It can also be realized, and can also be realized in a form in which two or more electric circuits are mounted on one circuit board.

  As shown in FIG. 1, the handy blender 100 according to the present embodiment is used by attaching an attachment 20 including a work 24 to a mounting portion 14 located at the tip of the main body portion 10.

  The attachment 20 shown in FIG. 1 was cut into blocks after stirring the liquid contained in a cup such as a measuring cup, whipping the cream contained in the bowl, or simmering as described above. It serves as a blender that is used in cooking, such as pasting vegetables.

  The attachment 20, which is a blender, is a rotating shaft that is rotatably arranged in the attachment 20 after becoming a small diameter portion 22 that gradually decreases from the mounting end 21 attached to the main body portion 10 toward the tip portion. The cover portion 25 of the blender blade (stirring blade) 24 as a work fixed to the tip of the head 23 is configured to have a larger diameter again. In addition, the lower end surface side in the cover part 25 is an open surface, and when the front end of the attachment 20 is inserted to a position reaching the object to be cooked accommodated in the cup, the blender blade 24 is directly attached to the object to be cooked. It comes to contact.

  The attachment end portion 21 of the attachment 20 is formed so as to be able to be fitted to the attachment portion 14 of the main body portion 10, and a large-diameter first fit that fits the first small diameter portion 14 a of the main body portion 10 is formed on the inner surface side thereof. A fitting recess 21a and a second fitting recess 21b that is smaller in diameter and deeper than the first fitting recess 21a that fits into the second small diameter portion 14b of the main body are formed. A helical attachment convex portion 26 formed corresponding to the convex portion 15 formed in the second small diameter portion 14b of the main body portion 10 is formed on the inner side surface of the second fitting concave portion 21b. By rotating the attachment end portion 21 of the attachment 20 and the attachment portion 14 of the main body portion 10 together so that the convex portion 15 and the attachment convex portion 26 are screwed together, the attachment portion 20 is attached to the main body portion 10. Can be worn.

  In a state where the attachment 20 is attached to the distal end of the main body 10, the distal end portion of the drive shaft 16 of the main body 10 and the upper end (not shown) on the main body side of the rotation shaft 23 in the attachment are brought into contact with each other. As a result, the rotation of the motor of the main body portion 10 is transmitted to the rotary shaft 23 in the attachment via the drive shaft 16, and the blender blade 24, which is a workpiece, rotates. In this manner, in the handy blender 100 of the present embodiment, the blender blade 24 that is a workpiece disposed in the attachment 20 is indirectly attached to the drive shaft 16 that is rotated by the motor disposed in the main body 10. .

  It should be noted that the first diameter small portion 14a and the second diameter small portion 14b of the main body 10 can be easily and accurately fitted to the mounting portion 14 of the main body 10 and the mounting end 21 of the attachment 20. A guide member such as a guide groove or a guide protrusion can be appropriately provided in the first fitting recess 21 a and the second fitting recess 21 b of the attachment 20. In addition, marks indicating the correct fitting positions of both of the side surfaces of the mounting portion 14 of the main body 10 and the side surfaces of the mounting end portion 21 of the attachment 20 can be arranged. Furthermore, a lock mechanism can be provided as appropriate so that the attached attachment 20 does not easily fall off the main body 10.

<Operation example of handy blender>
FIG. 2 is an image diagram showing a usage state of the handy blender according to the present embodiment.

  When the attachment 20 as the blender shown in FIG. 1 is attached, as shown in FIG. 2, the user holds the handy blender 100 of the present embodiment with the right hand and the cooked object 27 is accommodated with the left hand. The cup 27 is pressed, and the blender blade 24 is rotated in a state where the cover portion 25 at the tip of the handy blender 100 is inserted into the cup 27 and floated in the hollow.

  In the handy blender 100 of the present embodiment, the motor control unit is set so that the motor starts rotating only when it is detected that the user has pressed the upper button 11a while pressing the lower button 11b. ing.

  Furthermore, in the handy blender 100 of the present embodiment, the motor control unit rotates the motor at a predetermined number of rotations according to cooking contents through a pre-process for rotating the motor at a low speed for a certain period at the start of rotation of the motor. Control is performed so as to shift to this step.

  FIG. 3 is a diagram for explaining the control content of the motor rotation speed by the motor control unit of the handy blender according to the present embodiment.

  In FIG. 3, reference numeral 31 in the upper stage indicates a control signal for controlling the motor speed output from the control circuit of the motor control unit. Further, the lower reference numeral 32 in FIG. 3 indicates a change in the rotational speed of the motor.

  As shown in FIG. 3, the rotation of the motor is started from time t <b> 0 when the user instructs to start the rotation of the motor from the operation button 11. In the handy blender 100 of this embodiment, since the control signal 31 is given as a PWM control signal, the control signal 31 starts to repeat ON / OFF from time t0 (= 0 second), and the duty ratio gradually increases. The ratio of ON time increases as it increases.

  As an example, the control signal 31 which is a PWM control signal whose duty ratio has changed from 0% to 100% during the previous process period of 2 seconds until this process is started with t1 = 2 seconds is expressed as time t1. From this time to the present process period, the output is maintained in the ON state (duty ratio is 100%). At this time, the rotational speed 32 of the motor also becomes a predetermined rotational speed R1 at the time of cooking by the attachment 20 as the blender at time t1, for example, 13000 rpm.

  After reaching the predetermined rotation speed R1, the motor rotates until the motor controller detects that the cooking is completed or is temporarily stopped and the operation button 11 is released. Continue to rotate at.

  The motor control unit is a blender for mashing potatoes, making pumpkin paste, or making banana or strawberry juice, in order to avoid adverse effects such as heat generated by the motor rotating continuously for a long time. When the upper limit (for example, 30 seconds) of the preset continuous rotation time of the blender blade 24 is reached, control for automatically stopping the rotation of the motor can be performed.

  As described above, in the handy blender 100 according to the present embodiment, the motor control unit that controls the rotation of the motor shifts to the main process at a predetermined rotational speed through the previous process with a small rotational speed when the motor starts rotating. To control.

  For this reason, it is possible to effectively avoid the occurrence of a large torque reaction that occurs when the motor suddenly starts rotating at a high speed. Therefore, in the handy blender 100 according to the present embodiment, the main body 10 including the drive shaft 16 that is rotated by the motor is directly gripped, and further, the user performs cooking while holding the handy blender 100 in a state of floating in the air. Even in such a case, it is possible to prevent such a situation that the user hurts the wrist.

  Moreover, in the handy blender 100 of the present embodiment, the motor control unit performs control so as to pass through a pre-process for rotating the motor at a low speed before shifting to the main process at a predetermined rotation speed. It is possible to exert a further effect that it is possible to prevent the splattering.

  Experimental results confirming the effect of preventing the object to be splattered when the motor control unit mounted on the handy blender of this embodiment performs the rotation control of the motor that moves to the present process after the previous process of the low-speed rotation Is shown in FIG. FIG. 4A shows a case where rotation control is performed by the motor control unit described in the present embodiment. FIG. 4B shows the case of a comparative example in which the motor rotation is directly started as the main process without going through the previous process.

  The experiment whose result is shown in FIG. 4 is a comparison of the actual scattering state of the food to be cooked by the blender blade due to the difference in motor rotation control. Since the purpose is to check the state of the food to be splashed, water that has been colored with ink on a shallow dish (65 mm diameter, maximum (center) depth 15 mm) in order to make the condition that the splash is likely to occur. Were prepared so that each would be about half the depth. Then, from the state where the blender blade 24 of the handy blender 100 equipped with the attachment 20 shown in FIG. 1 is immersed in the water in the dish, the rotation of the motor is actually started so that the water is scattered from above the dish. I took a picture. 4 (a) and 4 (b), the central circular portions 41 and 41 'are dishes filled with water, and the surrounding colored portions are water scattered around from the dishes.

  When the motor rotation control by the motor control unit of the handy blender 100 according to the present embodiment shown in FIG. 4A is performed, the rotation of the motor is started at an initial value of 500 rpm at the start of the experiment, and it takes 2 seconds. As shown in FIG. 3, the rotational speed was continuously increased, and after reaching a predetermined rotational speed of 6500 rpm, the rotation was stopped after 3 seconds.

  In the motor control of the comparative example shown in FIG. 4B, the rotation was controlled at a predetermined number of rotations of 6500 rpm from the start of rotation, and the rotation was stopped in 5 seconds from the start of rotation.

  As is clear from FIG. 4, when the rotation control is performed by the motor control unit of the present embodiment shown in FIG. 4A, compared with the case where the motor control of the comparative example of FIG. 4B is performed. It can be seen that both the amount of scattered water and the scattered distance are kept small.

  In the handy blender according to the present embodiment, as shown in FIGS. 1 and 2, the rotational shaft 23 on the upper side from the side portion of the blender blade 24 attached to the distal end portion of the rotational shaft 23 in the attachment 20. Since the cover part 25 is provided so as to cover the surroundings, even when a liquid cooking object is cooked with stirring, scattering to the surroundings of the cooking object is difficult to occur. However, when a large amount of the cooking object 28 of a predetermined amount or more is put in the container 27, or when the user starts rotating the motor with the tip portion of the handy blender 100 not sufficiently placed in the container 27, The to-be-cooked object 28 may be scattered around the container 27 by the rotation of the blender blade 24.

  In the handy blender 100 of the present embodiment, as described above, even when the user uses the cooking object 28 in a state in which the cooking object 28 easily scatters around the container 27, the cooking object 28 is prevented from actually scattering, or The amount of scattering can be reduced.

  In the above description, in the motor rotation control in the handy blender 100 according to the present embodiment, the use of the PWM control signal as the control signal 31 has been described as an example. In the handy blender 100 of this embodiment, either a DC motor or an AC motor can be used as a motor that rotates the drive shaft 16. When a DC motor is used, the signal output of the control signal 31 for performing PWM control is amplified by an operation amplifier and supplied to the motor, or a predetermined DC is supplied via a switching element that controls the ON / OFF time by a PWM control pulse. By supplying the motor drive voltage at different duty ratios, it is possible to easily obtain a DC voltage waveform in which the length of the ON period is gradually increased.

  When an AC motor is used as the drive motor, a PWM control signal can be input to the gate terminal of a triac (bidirectional thyristor) to control the phase of the AC voltage and control the motor speed.

  FIG. 5 is a diagram illustrating a voltage waveform of the rotational speed control using the triac when the AC motor is used. FIG. 5A shows a state in which the duty ratio in PWM control is relatively small, and FIG. 5B shows a state in which the duty ratio in PWM control is relatively large.

  In FIG. 5A, ZC indicated by reference numeral 51 is detected so that the input voltage is applied only when the PWM signal 52 is in the ON state, so that the drive current 53 supplied to the AC motor is turned on in the PWM signal. It can be controlled to flow only during a period. Compared with FIG. 5 (a), in the state shown in FIG. 5 (b) where the ON period of the PWM signal 52 ′ is long, that is, the duty ratio is large, the driving current 53 ′ is applied for a long time by the motor. The AC motor can be rotated at a higher speed.

  In the handy blender 100 of the present embodiment, the control of the motor rotation speed is not limited to the above-described PWM control, but a method of directly changing the magnitude of the motor drive current, or variable resistance means in the motor drive circuit This can be realized by adopting various means capable of controlling the number of revolutions in each of the DC motor and the AC motor, such as a method for controlling the number of revolutions of the motor by inserting a resistance value.

  In the above embodiment, the example in which the rotation speed of the motor in the preceding process period is linearly increased has been described. However, the motor rotation control in the preceding process for rotating the motor at a low speed is linearly performed as illustrated in FIG. It is not limited to those that increase the rotational speed.

  FIG. 6 shows different control patterns of motor rotation speed control in the handy blender according to the present embodiment.

  In the handy blender 100 according to the present embodiment, as a motor rotational speed control pattern in the previous process, for example, as shown in FIG. 6, rotational speed control for increasing the rotational speed stepwise while maintaining the same rotational speed for a certain period of time. It can be performed.

  For example, as shown in FIG. 6, from the time t0 to t2 at the start of the rotation in the previous process, the first rotation speed R2, from the time t2 to t3 is the second rotation speed R3, and from the time t3 to t4. At a third rotation speed R4 and a low-speed rotation at a four-stage rotation speed from time t4 to t1 at a fourth rotation speed R5, and after this time t1, a predetermined rotation speed R1 It is possible to control the rotation of the motor that rotates at the same time.

  At this time, it is necessary to satisfy the relationship of R2 <R3 <R4 <R5 so that the rotational speed at each stage gradually increases. In addition, from the viewpoint of achieving the purpose of reducing the burden applied by the torque generated by the rotation of the motor for the user holding the main body 10 of the handy blender 100, and reducing / preventing scattering of the food to be cooked. As illustrated in FIG. 6, the rotation time at a low speed is set longer, that is, the relationship of (t2-t1)> (t3-t2)> (t4-t3)> (t1-t4) is satisfied. It is possible to perform rotation control of a simple motor. However, the rotation is not limited to the rotation control pattern set so that the time for rotating the motor at each rotation speed is gradually shortened as shown in FIG. 6, but the rotation time at each rotation speed is substantially constant. In contrast to the control pattern shown in FIG. 6, a rotation control pattern that sets a longer rotation time at a higher rotation speed can be employed.

  Further, in FIG. 6, the step at each step of increasing rotational speed, that is, the amount of change in rotational speed at each step (R2-0, R3-R2, R4-R3, R5-R4, R1-R5) is An example of the rotation control pattern set so as to be substantially equal is shown. However, in the handy blender 100 of the present embodiment, when the rotation control is performed to increase the rotation speed stepwise in the previous step, the increasing degree of the increased rotation speed is set evenly as shown in FIG. It is not limited to. For example, the stepwise step is set to gradually increase, that is, the relationship of (R2-0) <(R3-R2) <(R4-R3) <(R5-R4) <(R1-R5). The rotational speed at each step can be set so as to satisfy the above. In this case, since the motor rotation speed that starts rotating in accordance with the switch operation can be set so as to be particularly low-speed rotation in the first half of the previous process, it is possible to effectively reduce the adverse effects caused by the motor torque. . On the contrary, it is set so that the stepped step is gradually reduced, that is, (R2-0)> (R3-R2)> (R4-R3)> (R5-R4)> ( The rotational speed at each step can be set so as to satisfy the relationship of R1-R5).

  In the example shown in FIG. 6, an example is shown in which the process proceeds to the main process in which the rotation at the predetermined rotation speed R <b> 1 is performed through the previous process in which the motor rotation speed is low-speed rotation at four stages. However, the number of low-speed rotation steps in the previous process is not limited to four. The number of low-speed rotation steps is one, that is, the rotation that shifts to the main process of rotating at a predetermined speed after the previous process in which the low-speed rotation is performed a predetermined number of times without changing the motor speed in the previous process. A number of control patterns can be employed. Further, the rotation control of the motor that shifts to the high-speed rotation in this step can be performed through the low-speed rotation control at the desired number of steps of 2, 3, or 5 or more steps.

  Furthermore, as a motor speed control at a low speed in the previous process, the speed control pattern for gradually increasing the motor speed so as to approach the speed in this process is the linear speed shown in FIG. 6, in addition to the case of controlling the rotational speed to increase stepwise as shown in FIG. 6, the rotational speed control for continuously increasing the rotational speed while changing the increasing degree of the rotational speed It can be performed.

  FIG. 7 is a diagram showing a control pattern of further different rotational speeds in the previous step for continuously increasing the rotational speeds in this way.

  As the rotational speed control in the previous process for continuously increasing the rotational speed, as indicated by reference numeral 71 in FIG. 7, a rotational speed control pattern in which the degree of increase in rotational speed increases with time, and reference numeral 72 As shown, two types of rotation speed control patterns that increase the rotation speed while decreasing the increase degree of the rotation speed with time can be assumed.

  The rotational speed control pattern that gradually increases the rotational speed increase, indicated by reference numeral 71 in FIG. 7, performs control such that the rotational speed increases more rapidly in the second half of the previous process than in the first half of the previous process. Thus, it is common with the control pattern of the number of revolutions illustrated in FIG. For this reason, it is possible to reduce the burden on the user's hand holding the main body of the handy blender 100 by the torque generated at the start of the rotation of the motor, and to effectively suppress the adverse effect of the food being scattered. It can be made stronger.

  On the other hand, in the control pattern of the rotational speed indicated by reference numeral 72 in FIG. 7, the rotational speed becomes a certain level or more at a relatively early stage of the previous process, so that the cooked food is harder than fruits or boiled vegetables. If the motor speed is too low, such as when cooking potatoes, pumpkins, etc. in a block and then cooking in a paste using the blender blade 24, the blender blade 24 This is particularly suitable when rotation is hindered. Even in the case of a control pattern that causes a change in the rotational speed indicated by reference numeral 72 in FIG. 7, at the start of the rotation of the motor, the process proceeds to the present process through a previous process that rotates at a lower speed than the predetermined rotational speed in the present process. Compared to the case of motor rotation control that suddenly rotates the motor at a predetermined number of revolutions in this process without passing through the previous process, the effect of avoiding the adverse effects due to the torque at the start of motor rotation The effect which prevents the to-be-cooked thing from scattering can be exhibited.

<Motor rotation control without pre-process>
Next, in the handy blender 100 according to the present embodiment, a case where the motor control unit shifts to the present process without going through the previous process of low-speed rotation will be described.

  FIG. 8 is an exploded perspective view showing another example of the attachment attached to the tip of the main body of the handy blender of the present embodiment.

  An attachment 80 of another example shown in FIG. 8 is an attachment configured by combining a container lid 81, a chopper cutter 82, and an attachment cup 83.

  The upper surface side of the container lid 81 is a mounting end 81 a on the attachment 80 side that fits with the mounting portion 14 of the main body 10. Similar to the mounting end portion 21 of the attachment 20 as the blender shown in FIG. 1, the inner diameter side of the mounting end portion 81 a of the container lid 81 has a shape of the first small diameter portion 14 a in the mounting portion 14 of the main body portion 10. A corresponding large-diameter first fitting recess 81b and a second fitting recess 81c having a smaller diameter than the first fitting recess 81b and corresponding to the shape of the second diameter small portion 14b of the main body are formed.

  A lid rotation shaft (not shown) arranged in the vertical direction is arranged at the inner center portion of the lower portion 81d spreading in a cone shape of the container lid 81. When the attachment 80 is attached to the main body portion 10, the lid The concave / convex shape for fitting formed on the upper end surface of the part rotation shaft is fitted with the concave / convex shape formed on the lower end surface of the drive shaft 16 of the main body unit 10, and as the drive shaft 16 of the main body unit 10 rotates. The lid rotation shaft of the container lid 81 rotates.

  The lower end portion 81d of the lower portion 81d of the container lid 81 has an annular shape that can be inserted into the inner wall of the upper end portion on the side of the attachment cup 83 so that the container lid 81 can be securely put on the attachment cup 83. Protrusions (not shown) are formed.

  The chopper cutter 82 includes a shaft portion 82a and a chopper member 82b disposed on the lower end side of the shaft portion 82a and extending laterally. A recess hole (not shown) is formed coaxially with the shaft center on the lower end side 82c of the shaft portion 82a of the chopper cutter 82, and the support shaft extends upward from the center of the bottom surface 83a of the attachment cup 83. The chopper cutter 82 can freely rotate in the attachment cup 83 by being placed so as to cover the 83b.

  The upper end portion of the shaft portion 82a of the chopper cutter 82 is configured such that a plate-like member 82e extending laterally from the shaft-shaped portion 82d is disposed. A plate-like portion 82e formed on the upper end portion of the shaft portion 82a of the chopper cutter 82 by covering the container lid 81 with the chopper cutter 82 placed on the support shaft 83b formed on the bottom surface 83a of the attachment cup 83. Is fitted in a recess formed in the bottom surface of the above-described lid rotation shaft disposed inside the container lid 81, and the chopper cutter 82 can rotate together with the lid rotation shaft. In this way, the chopper cutter 82 disposed inside the attachment cup 83 of the attachment 80 with the container can be indirectly attached to the drive shaft 16 of the main body 10, and the work is accompanied by the rotation of the drive shaft 16. The chopper cutter 82 can be rotated.

  The attachment cup 83 is a cup-shaped member having a relatively large opening made of transparent glass. A support shaft 83b extending toward the opening side of the attachment cup 83 is formed at the center of the bottom surface 83a of the attachment cup 83, and the chopper cutter 82 placed so as to cover the support shaft 83b is rotated. Support freely. Further, the inner diameter of the upper end portion of the side surface 83c of the attachment cup 83 is such that the annular convex portion formed at the opening end portion of the container lid 81 can be inserted, and the container lid 81 is attached to the attachment cup 83. By covering the top from above, both can be integrated without a gap.

  A rubber member 83d, which is a removable annular slip stopper, is disposed on the back side (that is, the outside) portion of the bottom 83a of the attachment cup 83.

  As described with reference to FIG. 8, in the handy blender 100 of the present embodiment, the chopper cutter 82 that is a workpiece is rotatably supported in the attachment cup 83 as the container-attached attachment 80, and ground meat or fish is ground. A wide variety of cooking can be performed, such as chopping onions and carrots, and making bread crumbs using bread. Moreover, it replaces with the chopper cutter 82 arrange | positioned in the attachment cup 83, and the unillustrated whipped blade used for stirring fresh cream, meringue, etc., the unillustrated bread kneading plate for kneading bread crumbs, the grated radish not shown A work suitable for each cooking, such as a cutter, can be used interchangeably, and the types of cooking that can be cooked using the handy blender 100 can be greatly expanded.

  FIG. 9 is an image diagram for explaining a cooking state in a state in which the container-attached attachment described with reference to FIG. 8 is attached.

  As shown in FIG. 9, as an attachment to be attached to the main body unit 10, an attachment 80 with a container provided with a container that can store an object to be cooked and various works such as various blades that are rotatably arranged inside the container. When used, the user places the attachment lid 81 on the kitchen table or the like, and the container lid 81 of the attachment 80 with the hand (left hand) opposite to the hand (right hand) holding the main body 10. You can hold the part. Further, as described above, the attachment cup 83 is made of glass having a relatively heavy weight, and the annular rubber member 83d that is a non-slip is disposed on the back side of the attachment cup 83, so that a light force can be obtained. However, the attachment with container 80 can be held on the kitchen table relatively firmly.

  As shown in FIG. 9, when cooking using an attachment with a container, the user is in a state of lightly supporting the main body 10, so even if the motor built in the main body 10 rotates, A situation in which the torque places a burden on the user's wrist hardly occurs. Moreover, since the opening part of the attachment cup 83 of the attachment 80 with a container is covered with the container lid 81, as long as it uses by the normal usage method in which a user presses the container lid 81 as shown in FIG. Even when 82 suddenly starts high-speed rotation, the cooking object 84 does not scatter around.

  Thus, when the attachment 80 with a container is mounted, in the handy blender 100 according to the present embodiment, the motor control unit starts from the rotation start point of the motor without going through the previous process with a small number of motor rotations. Rotation control can be performed as the main process of rotating at a predetermined number of rotations. In particular, the cooking performed using the attachment with a container 80, as described above, uses a relatively hard or highly viscous material to be cooked, and therefore exerts a force in a direction that prevents rotation of the workpiece. There are many. When cooking such an object to be cooked, an unexpected situation such as the motor being unable to start rotating can occur through the previous process of rotating the motor at a low speed before starting cooking in this process. There is.

  Therefore, when cooking by attaching the attachment 80 with the container to the main body 10, it is preferable that the motor control unit performs rotation control that shifts to the present process immediately after starting the rotation without going through the previous process. .

  In the handy blender 100 of this embodiment, the attachment attached to the attachment portion 14 of the main body 10 is the attachment 20 as a blender as shown in FIG. 1, or the attachment with a container shown in FIG. A detection mechanism for detecting whether it is 80 can be provided. A detection mechanism for detecting the type of attached attachment includes a terminal portion as an electrical detection portion, various sensor elements, or a machine on the attachment portion 14 of the main body 10 and the attachment end portions 21 and 81a of the attachments 20 and 80. This can be realized by arranging a projection as a target detection unit and a fitting recess corresponding to the projection.

  By providing such a detection mechanism that can determine the type of attachment attached to the tip of the main body unit 10, the motor control unit indicates that the attachment with container 80 is attached as an output signal from the detection mechanism. When the motor is received, it is possible to perform rotation control that automatically shifts to this step immediately after the start of rotation of the motor without passing through the previous step. In this way, the motor control unit determines the necessity of the previous process according to the type of attached attachment, and automatically performs appropriate rotation control, so that the user can properly use the rotation control according to the attachment type Is not necessary, and the handy blender 100 having high convenience can be realized.

  As described above, in the handy blender 100 according to the present embodiment, the motor control unit that controls the rotation of the motor rotates at a predetermined number of rotations after passing through a pre-process for rotating at a low speed after the motor starts rotating. Rotation control that shifts to this process is performed. As a result, since the motor can be prevented from rotating suddenly at the start of rotation of the motor, the reaction of the torque accompanying the start of rotation of the motor is transmitted to the wrist of the user gripping the main body, and the wrist is damaged. Can solve the problem. In addition, by performing low-speed rotation at the start of motor rotation, it is possible to effectively prevent the cooking object from splashing out of the cooking cup when a low-viscosity material such as a liquid is used. can do. Furthermore, by reducing the motor drive power supplied to the motor at the start of motor rotation, so-called inrush current can be prevented, and the burden on the motor and the electric circuit elements that drive the motor can be reduced. Can be obtained.

  In the above-described embodiment, the handy blender is exemplified as one that can handle various types of cooking by rotating different types of workpieces by attaching various attachments to the tip of the main body portion in a replaceable manner. However, the handy blender as the electric cooking device according to the present application is not limited to one that can be attached to the main body portion in a replaceable manner. For example, even if it is a handy blender that uses different types of workpieces interchangeably, various workpieces can be exchanged directly on the drive shaft that is rotated by the motor housed in the main unit instead of via an attachment. It can be realized as a configuration that can be mounted. In addition, when cooking as a blender, even in a handy blender in which a work blade cannot be replaced, in which a suitably shaped stirring blade is fixed to the tip of the drive shaft in a non-replaceable state, this work is performed after the low-speed rotation pre-process The structure provided with the motor control part which performs rotation control of the motor which transfers to a process is realizable.

  The configuration of each part of the handy blender described above is merely an example, and the shape and size of the main body, in particular, the position and shape of the portion gripped by the user, the configuration of the switch operated by the user Various forms different from those exemplified above, such as number, shape, and arrangement position, can be employed.

  However, the electric cooker disclosed in the present application is limited to an electric cooker having a shape in which a motor for rotating a workpiece is housed in the main body and the user directly holds the main body to perform cooking. For example, even in a mixer (stirrer) as an electric cooker, a configuration in which a gripping portion that is gripped by a user is provided separately from a main body portion in which a motor is accommodated, particularly in a direction substantially orthogonal to the main body portion. The electric cooker having a configuration including a gripping portion that does not correspond to the electric cooker disclosed in the present application. In an electric cooker in which the user does not perform cooking by gripping the main body containing the motor, the reaction of torque caused by the rotation of the motor on the wrist of the user holding the electric cooker has an adverse effect when the motor starts rotating. There is no problem to be solved by the present invention.

  Moreover, in the said embodiment, although the handy blender provided with the function which stirs to-be-cooked material was illustrated and demonstrated, the electric cooker disclosed by this application is not restricted to this, A to-be-cooked object is narrowed to the front-end | tip of a drive shaft. It can be realized as various handy-type electric cookers that perform cooking by rotating a workpiece by a motor, such as an electric cooking cutter provided with a cutter having only a function of cutting off.

  The electric cooker according to the present disclosure is useful as a handy type electric cooker that can easily cook while holding the main body.

10 Main Body 16 Drive Shaft 20 Attachment 24 Blender Blade (Workpiece)
100 Handy blender (electric cooker)

Claims (7)

A main body having a motor, a drive shaft rotated by the motor, and a motor controller for controlling rotation of the motor;
A workpiece attached to the drive shaft and rotating together with the drive shaft to cook the food to be cooked,
An electric cooker in which the user grips the main body and cooks,
The motor control unit performs rotation control to shift to the main process of rotating the motor at a predetermined rotation speed after passing through a previous process of rotating the motor at a low speed for a certain period at the start of rotation of the motor. Cooking device.   The electric cooker according to claim 1, wherein the motor control unit performs rotation control for continuously increasing the rotation speed of the motor in the previous step.   The electric cooker according to claim 1, wherein the motor control unit performs rotation control to increase the rotation speed of the motor stepwise in the previous step.   The electric cooker in any one of Claims 1-3 whose period of the said pre-process is 3 second or less. A plurality of types of attachments that can be attached to the front end of the main body unit having a rotating shaft that rotates with the rotation of the drive shaft and the workpiece attached to the rotating shaft,
The electric cooker according to any one of claims 1 to 4, wherein a plurality of types of the workpieces are attached in a replaceable manner by replacing the attachment.   When the attachment with a container in which the work is rotatably arranged is mounted inside a cooking container capable of accommodating an object to be cooked as the attachment, the motor control unit does not go through the previous process. The electric cooking device according to claim 5, wherein the rotation control for shifting to the process is performed. It further comprises a detection means capable of detecting the type of the attached attachment,
The motor control unit automatically performs a rotation control that shifts to the main process without passing through the previous process, based on a detection signal that is output from the detection means and indicates that the attachment with a container is attached. The electric cooker according to claim 6, wherein the electric cooker is performed.