JP2001029243A - Food crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a motor from being driven and permit foods to be efficiently crushed by turning an operation switch on in the state of removing a cover from a casing. SOLUTION: This food crusher A comprises a crushing cutter 10 for crushing foods being rotated in a storage container, a motor 3 for rotationally driving the crushing cutter, a cover 7 detachably mounted on a casing, and an operation switch SW1 for driving the motor to give crushing treatment to foods. It also includes a setting switch SW2 for setting crushing modes for foods, a protecting means 12 consisting of a protection switch LS and a thrusting rod 13 for turning the protection switch on in association with the mounting of the cover on casing, and a controller responsive to the turn-on of the operation switch and the setting switch for controlling the operation of the motor and display means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a food pulverizing apparatus used for pulverizing solid foods (for example, tea leaves such as green tea, coffee beans, dried vegetables, etc.) into powder.

[0002]

2. Description of the Related Art Conventionally, a food crushing apparatus used for crushing a solid food, for example, tea leaves such as green tea, coffee beans, dried vegetables, etc. into a powdery form is, for example, a cylinder having a bottom opening and a bottom. A casing formed in a shape such as a shape, an electric motor as a drive source housed in a lower portion of the casing, and a bowl-like shape attached to an upper side of the casing for accommodating an object to be ground (food to be ground into a powder). A storage container, and a crushing blade (cutter) attached to a tip end of a rotor shaft of the electric motor protruding into the storage container and configured to pulverize an object stored in the storage container into powder while rotating the object. It is schematically configured to include a lid detachably attached to the opening of the casing so as to cover the upper surface of the storage container, and an operation switch for driving the electric motor by being turned on.

[0003] When the object to be crushed is crushed into powder by rotating the crushing blade, a predetermined amount of the object to be crushed is stored in the storage container, and then the upper surface of the storage container is covered by the opening of the casing. In this state, the cover is attached, and in this state, the operation switch is turned ON to drive the electric motor, and the grinding blade attached to the tip of the rotor shaft is rotated, so that the inside of the storage container is The stored object to be crushed is configured to be crushed into a powder.

[0004]

However, in the food crushing apparatus having the above-described structure, the electric motor starts even when the operation switch is turned on in a state where the lid is not attached to the casing. If the operation switch is turned ON by mistake before the lid is attached to the casing in a state where the crushed object is stored in the storage container, the crushed object in the storage container is rotated by the crushing blade body. There has been a problem that it overflows or scatters outside the storage container.

When the operation switch is turned on while the lid is removed from the casing and the inside of the storage container or the outer peripheral surface of the casing is cleaned, the crushing blade is rotated by a finger or the like. There is a risk of injury.
There was a safety problem.

Further, in the food crushing apparatus having the above-described structure, the ON operation of the operation switch must be continued until the crushed object is crushed to a desired size. During the process, no other work can be performed, so the work efficiency was very poor.

The present invention has been made in view of the above-mentioned various problems, and has an operation switch which is turned on in a state where a cover is removed from a casing.
It is an object of the present invention to provide a food crushing device that can prevent the electric motor from being driven by being operated, and can efficiently perform the crushing process of the crushed object.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a casing having an open upper portion formed in a hollow cylindrical shape, and a casing mounted on the upper side of the casing to perform a pulverizing process. A storage container for accommodating the pulverized material, a pulverizing blade for rotating and pulverizing the object to be pulverized accommodated in the accommodating container, an electric motor accommodated in the casing, and rotationally driving the pulverized blade, A lid is detachably attached to the opening of the casing, and comprises an operation switch for driving the electric motor to perform a pulverizing process of the object to be pulverized, and constitutes a food pulverizing apparatus. Further, a setting switch for setting the crushing mode of the crushed object, display means for displaying the crushing mode set by the setting switch, and when the lid is not attached to the casing, A protection device for preventing the motor from being driven by turning on the changeover switch, and a control device for controlling operations of the motor and the display means in response to the ON operation of the operation switch and the setting switch. Features.

[0009] A pair of locking projections and auxiliary projections are protruded and formed on the inner peripheral surface of the casing, and the locking projections are formed on the outer peripheral surface of a lid detachably attached to the casing. A pair of engaging portions and a pair of engaging grooves with which the auxiliary protrusions are engaged are respectively recessed, and further, a pressing protrusion is directed downward on one of the pair of engaging portions. The protection projection is pressed and operated by the pressing projection in conjunction with an operation of projecting and forming the locking projection and the auxiliary projection to engage with the engagement portion and the engagement groove. I do.

Further, the protection means is turned ON only when the lid is attached to the casing, and is connected to a protection switch for supplying commercial power to the control device and the electric motor, and in conjunction with the operation of attaching the lid to the casing. And a pressing rod for turning on the protection switch.

Further, the display means is constituted so that the grinding mode set by the setting switch can be individually lit and displayed. When the motor is driven, the display means corresponding to the grinding mode set by the setting switch blinks. In addition to the display, when the motor is stopped, the blinking display is configured to be continued from a state in which the motor is rotating due to inertia to a complete stop.

Further, the control device is characterized in that when the operation switch is turned ON before the pulverizing mode is set by the setting switch, the motor is prevented from being driven.

Further, the control device prohibits the setting operation of the crushing mode by the setting switch and the acceptance of the ON operation of the operation switch until the control device is reset after the crushing process of the object to be crushed is completed. It is characterized by doing so.

According to the present invention, in conjunction with the operation of attaching the cover to the casing, the protection switch is turned on by pressing the pressing rod of the protection means by the pressing projection provided on one of the engaging portions of the cover. After setting the crushing mode of the object to be crushed by the setting switch in the state, by turning on the operation switch, the electric motor was driven to rotate the crushing blade, so the lid was removed from the casing. Even if the operation switch is turned ON in this state, the crushing blade does not rotate due to the driving of the electric motor, so that there are problems such as injury to the fingers and the like and the crushed material in the storage container overflowing. Not at all. Further, since the electric motor continues to rotate for a time corresponding to the pulverizing mode set by the setting switch, it is possible to perform the pulverization processing of the pulverized object without continuing the ON operation of the operation switch.
Furthermore, since the display means which can individually display the crushing mode set by the setting switch is provided, by lighting the display means, which crushing mode is currently set is displayed by blinking. Whether it is operating in the pulverizing mode can be visually recognized at a glance.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 10 in which the present invention is applied to a tea grinder for grinding tea leaves such as green tea into powder.
1 to 3, reference numeral 1 denotes a casing of a tea grinder A made of a synthetic resin and formed in a hollow cylindrical shape with an open upper portion, and a handle 1a is provided on the right end side (the right side in FIGS. 1 to 3). Are formed integrally, and a bottom plate 1b is fastened and fixed to the lower end surface using screws or the like.

As shown in FIG. 3, a pair of locking projections 2a and 2b are provided on the inner peripheral surface of the casing 1 on the upper opening side in the left-right direction (left-right direction in FIG. 3). (In the vertical direction in FIG. 3), a pair of auxiliary projections 2c,
2d are provided at four locations with an angular interval of 90 ° between adjacent projections. As shown in FIGS. 2 and 3, a protruding wall 1c is provided around the inner peripheral surface of the casing 1 adjacent to the projections 2a to 2d with a predetermined thickness and an inner diameter. The projecting wall 1c
As shown in FIGS. 1 and 3, a window hole 1d is formed in a portion corresponding to the locking projection 2a.

Next, in FIG. 2, reference numeral 3 denotes an electric motor serving as a drive source of the tea grinder A. The electric motor 3 has a lower bracket 3 with its rotor shaft 3a directed upward.
b is fixed to the support member 4 attached to the lower portion of the casing 1 via a vibration isolating member 6 made of an elastic material such as rubber, and is stored in the casing 1 in an upright state. The supporting member 4 has an L-shaped claw-shaped member 4.
a of the casing 1 by engaging the leading end of the casing a with a locking groove 1e formed in the inner peripheral surface on the lower side of the casing 1.
It is attached to the lower side of.

Reference numeral 5 denotes a storage container formed by forming a thin metal plate into a bowl shape for storing an object to be ground (tea leaves to be ground into powder).
The edge of the opening side (upper side) is brought into contact with the lower end face of a protruding wall 1c provided around the inner peripheral surface of the casing 1, and the rotor shaft of the electric motor 3 is viewed from the bottom side (lower side). With the motor 3a protruding into the storage container 5, the motor 3
Is brought into contact with the upper bracket 3c via a vibration isolating member 6a made of an elastic material such as rubber.
It is supported on the upper side of the casing 1 while being sandwiched between the motor and the electric motor 3.

Reference numeral 7 denotes an inner peripheral surface of the opening of the casing 1,
A lid that is detachably attached so as to close the opening of the storage container 5, and an outer peripheral surface of the lid 7 is provided with a locking projection that protrudes and is formed on an inner peripheral surface of the casing 1. Engaging portions 7a and 7b with which 2a and 2b engage and engaging grooves 7c and 7d with which auxiliary projections 2c and 2d engage are respectively formed.

The engaging portions 7a and 7b with which the locking projections 2a and 2b engage are, as shown in FIGS. An engagement groove 8a;
The engaging groove 8a includes a locking groove 8b formed by providing a predetermined step in the height direction and recessed, and a communication groove 8c that connects the engaging groove 8a and the locking groove 8b so that they can communicate with each other. It is formed on the outer peripheral surface of the lid 7 at an angle of 180 °.

On the other hand, as shown in FIGS. 1 and 4, the engagement grooves 7c and 7d with which the auxiliary projections 2c and 2d engage are formed.
The lid 7 is provided with a 90 ° angle interval between the first and second lids 7a and 7b, and is laterally elongated at the lower end of the outer peripheral surface of the lid 7 along the circumferential direction.

As shown in FIG. 5, a right end surface of the engaging groove 8a is provided on the engaging portion 7a (the right side in FIG. 4) of the engaging portions 7a and 7b with which the locking projection 2a is engaged. On the lower end surface of the lid 7 adjacent to (right side in FIG. 5), a pressing projection 8d is provided and formed to project downward.

As shown in FIG. 7, the lid 7 engages the locking projections 2a and 2b on the inner peripheral surface of the casing 1 with the engaging grooves 8a of the engaging portions 7a and 7b, and Protrusion 2
In a state where the lock projections c and 2d are engaged with the engagement grooves 7c and 7d, the lid 7 is rotated clockwise in FIG.
Is moved from the engaging groove 8a through the communication groove 8c to the locking groove 8b, and is engaged with the locking groove 8b (see FIG. 8B). It can be installed in a state where it is prevented from being detached.

Next, in FIGS. 1 to 3, reference numeral 9 denotes an attachment which is screwed and fixed to the tip of the rotor shaft 3 a of the electric motor 3 projecting into the storage container 5, and 10 is stored in the storage container 5. A crushing blade (cutter) for crushing an object to be crushed (tea leaves) into a powder while rotating at high speed is shown. The crushing blade 10 can co-rotate with a rotor shaft 3a of the electric motor 3 via an attachment 9. And is rotated at a high speed by the drive of the electric motor 3 to pulverize the material to be pulverized stored in the storage container 5 into powder.

[0025] 11 denotes an operation panel provided on the right front side of the casing 1, the operation panel 11, an operation switch SW ₁ for performing the grinding process of grinding object by driving the electric motor 3 (tea) the a set switch SW ₂ for setting the grinding mode of grinding object (grinding time), the in grinding mode (the invention as set by the setting switch SW _2, "grits" mode, "ground medium" mode ,
Display means LED ₁ ~LED ₃ for individually displayed is referred to as "finely ground" mode) are disposed respectively.

Next, in FIG. 2, 12 in a state where the lid 7 is not attached to the casing 1, when the operation switch SW ₁ of the operation panel 11 is turned ON, that the electric motor 3 to drive Protection means to prevent
The protection means 12 includes a commercial power supply and a control device 15 described later.
(See FIG. 9) in series, and is turned ON only when the lid 7 is attached to the casing 1 to supply a commercial power to the electric motor 3 and a control device 15 described later; A pressing rod 13 that is housed in a space inside the casing 1 so as to be vertically movable and that turns on the protection switch LS in conjunction with the operation of attaching the lid 7 to the casing 1;
A compression spring 14 that constantly urges the pressing rod 13 upward.
(See FIG. 6).

As shown in FIGS. 2 and 6, the protection switch LS is provided on a wall 4c standing on a support member 4 attached to a lower side of the casing 1 so as to project forward of the wall 4c. It is detachably attached by using the inserted insertion shafts 4d, 4d and the locking claws 4e, 4e.
As shown in FIG. 6, the locking claws 4e of the support member 4
4e, cylindrical cylindrical portions 4f, 4 erected at a position close to 4e.
f.

On the other hand, as shown in FIG. 6, the pressing rod 13 comprises a flat rod-shaped main body 13a, an arc-shaped pressing part 13b formed at the upper end of the rod main body 13a via a flange 13c, and A forked connecting portion 13d formed at the lower end of the rod body 13a;
The support shafts 13e, 13e projecting and formed via the flanges 13f, 13f at the respective distal end portions of d, and the pressing body 13g formed at the lower end of the connecting portion 13d (see FIGS. 2 and 8 (a)). ).

Then, the pressing rod 13 is
As shown in (a), the pressing portion 13b is inserted into a window hole 1d formed in the protruding wall 1c of the casing 1 so that the flange portion 13c abuts on the lower end surface of the protruding wall 1c and has a bifurcated connection. The support shafts 13e provided on the portion 13d are connected to the flanges 13f
With the compression springs 14 interposed between the cylindrical member 4f and the bottom of the cylindrical member 4f of the support member 4, the cylindrical member 4
f, 4f and a through hole 4 perforated at the bottom of the cylindrical portion 4f, 4f
g and 4g, respectively, so as to be vertically movable between the protruding wall 1c of the casing 1 and the support member 4 in a state of being constantly urged upward by the urging force of the compression springs 14, 14. It is supported.

Next, FIG. 9 is a block diagram schematically showing the control device 15 of the tea grinder A of the present invention. In FIG. 9, reference numeral 16 denotes a power supply circuit for converting a commercial power supply (100 V AC) into a DC 5 V power supply (constant voltage power supply for an electronic circuit) by a rectifier circuit or the like (not shown) and outputting the converted power supply. Fuse f, noise filter N
F, and the protection switch LS is
Only when N is applied (that is, when the lid 7 is attached to the casing 1), commercial power is supplied through the fuse f and the noise filter NF, and the commercial power is converted into a DC 5V power and output. .

Reference numeral 17 denotes a microcomputer (hereinafter, referred to as a microcomputer). An input terminal of the microcomputer 17 includes an input circuit 18 for noise protection, and a microcomputer 17 when the power supply of the DC 5 V drops.
A reset circuit 19 for resetting and an oscillator 20 for outputting a clock signal are connected to each other, and an output terminal is provided with an output circuit 21 for noise protection and a display means LED.
_{1 to} LED ₃ are connected respectively. An operation switch SW ₁ and a setting switch SW ₂ are connected to the input circuit 18, and a drive circuit 22 (triac or the like) of the electric motor 3 and a snubber circuit 23 for surge cut are connected to the output circuit 21. The electric motor 3 is connected via the.

The commercial power is supplied directly to the electric motor 3 via the drive circuit 22 and the snubber circuit 23. After being converted to a DC 5V power in the power supply circuit 16, the microcomputer 17, the input circuit 18, and the reset circuit Circuit 19,
The signals are supplied to the output circuits 21 respectively.

Next, the operation of the present invention will be described with reference to FIGS. 1 and 3 and FIGS. First, a power plug (not shown) of the tea grinder A is connected to an outlet. Subsequently, as shown in FIG. 3, the lid 7 is removed from the inner peripheral surface of the casing 1, and the grinding blade 10 is attached to the rotor shaft 3 a of the electric motor 3 protruding into the storage container 5 via the attachment 9. A predetermined amount of material to be crushed (tea leaves) is accommodated in the accommodation container 5 in a state where the object is co-rotatably mounted.

After the object to be crushed is stored in the storage container 5 as described above, the lid 7 is attached to the inner peripheral surface of the casing 1 from above the casing 1 as shown in FIG. As shown in FIGS. 7 and 8 (a), locking projections 2a formed on the inner peripheral surface of the casing 1 are formed in engaging grooves 8a of the engaging portions 7a, 7b formed on the outer peripheral surface of the lid 7. 2b and the auxiliary protrusions 2c and 2d are engaged with the engagement grooves 7c and 7d, respectively.

At this time, the engaging groove 8a of the engaging portion 7a
The pressing projection 8d provided at a position adjacent to the right end portion is similar to that shown in FIG.
As shown in (a), the cover 1 does not reach the position corresponding to the pressing portion 13b of the pressing rod 13 facing the inside of the casing 1 from the window hole 1d formed in the projecting wall 1c of the casing 1. A predetermined gap is formed between the lower end 7 and the protruding wall 1c of the casing 1.

In the above state, when the lid 7 is rotated while being slightly pressed clockwise (clockwise in FIG. 7 and leftward in FIG. 8A), the engaging portions 7a and 7b The locking projections 2a and 2b engaged with the engagement groove 8a of FIG.
As shown in (b) (only the engaging portion 7a and the locking projection 2a are shown in FIG. 8 (b)), the rotation of the lid 7 causes the locking groove 8b to pass through the communication groove 8c. To the position, engages with the locking groove 8b, and has a pressing projection 8d provided at a position adjacent to the right end of the engaging groove 8a of the engaging portion 7a.
As shown in FIG. 8B, the pressing portion 13 of the pressing rod 13
Move to the position corresponding to b.

At this time, since a predetermined step is provided in the height direction between the engagement groove 8a and the engagement groove 8b, the engagement protrusions 2a and 2b located in the engagement groove 8a are not provided. The lid 7 is pushed downward by moving through the communication groove 8c and over the step to the locking groove 8b, and the lower end surface thereof is brought into contact with the upper end surface of the projecting wall 1c of the casing 1.

As a result, the pressing portion 13b of the pressing rod 13
The pressing protrusion 8d that has moved to a position corresponding to
As shown in (b), the rod body 13a is pressed downward of the casing 1 via the pressing part 13b against the urging force of the compression spring 14, and a connecting part formed at the lower end of the rod body 13a. The protection switch LS is turned ON by the pressing body 13g provided on the lower end surface of the 13d.

As described above, with the power plug (not shown) of the tea grinder A plugged into the outlet (see step S1 in FIG. 10), the material to be ground (tea leaves) is stored in the storage container 5.
Then, by attaching the lid 7 to the casing 1, the protection switch LS is turned on via the pressing rod 13.
When operated (see step S2 in FIG. 10), commercial power is supplied to the power supply circuit 16 of the control device 15 via the protection switch LS, and the DC 5V power converted and output from the power supply circuit 16 is supplied to the control device. is supplied to the microcomputer 17 of 15, the display unit LED ₁ ~ connected to the microcomputer 17
All the LEDs ₃ are turned on (see step S3 in FIG. 10).

Next, the operation for setting the crushing mode of the crushed material (tea leaves) will be described with reference to steps S4 to S16 in FIG. First, when turned ON the setting switch SW ₂ (see step S4 in FIG. 10), the operation is inputted to the microcomputer 17 via the input circuit 18 receives this input, all display unit LED ₁ ~LED ₃ is turned from to have a state, only the display unit LED ₁ showing the "Coarse" mode is turned on (see step S5 in FIG. 10). The ground mode while set to "coarse ground" mode, when ON operation of the operation switch SW ₁ (see step S6 in FIG. 10), the operation is inputted to the microcomputer 17 via the input circuit 18 receives the input And step S
At 7, for example, a two second timer (milling time in "coarse grinding" mode) is started.

The grinding mode is set to the "coarse grinding" mode.
Operation switch SW ₁Without turning on
(See step S6 in FIG. 10), and in step S8
Set switch SW again_TwoIs turned on, the step
Display means LED indicating "medium grinding" mode in S9_Two
Lights up. The grinding mode is set to "medium grinding" mode
In the state, the operation switch SW₁Is turned on (Fig. 10
In step S10), and in step S11,
For example, a 7-second timer (when crushing in the "medium
Interval) starts.

Further, the grinding mode is set to the "medium grinding" mode.
Operation switch SW ₁Without turning on
(See step S10 in FIG. 10), and in step S12
Set switch SW again_TwoIs turned on, the step
Display means LED indicating "fine grinding" mode in S13_Three
Lights up. Set the grinding mode to "fine grinding" mode
In the state, the operation switch SW₁Is turned on (Fig. 10
In step S14), and in step S15,
For example, a 70-second timer (when grinding in "fine grinding" mode)
Interval) starts.

[0043] Furthermore, in a state where the crushing mode is set to "finely ground" mode, operating without switch SW ₁ of the ON operation (see step S14 in FIG. 10), setting the switch SW ₂ again at step S16 is ON operation Then, the display means LED indicating the "coarse grinding" mode in step S5
₁ lights up again. That is, the grinding mode is shifted from the “fine grinding” mode to the “coarse grinding” mode.

[0044] Thus, in the setting of the grinding mode, every time the operation once ON the setting switch SW _2, "meal" mode → "ground medium" ground mode mode → "finely ground" mode → "coarse The mode is switched from “grinding” mode to..., And when the desired grinding mode is set, the operation switch SW ₁ is
By performing the N operation, a timer (2 seconds, 7 seconds) corresponding to the grinding time in each grinding mode set in advance is set.
Sec. Thus to start a 70 seconds), before setting the milling mode of grinding object by setting switch SW _2, even if the operating switch SW ₁ is turned ON, the electric motor 3 in no way be driven.

Next, the crushing operation of the material to be crushed (tea leaves) will be described with reference to steps S17 to S21 in FIG. In step S7, S11, S15 of FIG. 10, the timer corresponding to the milling mode set by the setting switch SW ₂ is started at the same time, the microcomputer 1
7 outputs a command signal for driving the electric motor 3 to a drive circuit 22 via an output circuit 21. The drive circuit 22 receives the command signal and supplies a commercial power supply to the drive circuit 22. Is supplied to the electric motor 3 through the snubber circuit 23 to drive the electric motor 3 (see step S17 in FIG. 10).

After driving the electric motor 3 as described above,
Step S18 the operation switch SW ₁ is judged whether it is ON in, if the operation switch SW ₁ has not been turned ON, the process proceeds to step S19, it sets the switch SW ₂
Display means corresponding to the milling mode set by (i.e., LED ₁ in the case of "grits" mode, LED in the case of "medium grind" mode _2, in the case of "finely ground" mode LE
D ₃ ) is shifted from the lighting state to the blinking state.

Next, in step S20, a timer corresponding to the set grinding mode (2 seconds timer in "coarse grinding" mode, 7 seconds timer in "medium grinding" mode, and "fine grinding" mode Determines whether the time of the 70-second timer has expired (that is, whether the crushing time has elapsed). If it is determined in step S20 that the timer has not expired, the process proceeds to step S20.
Move to 18.

[0048] Thus, after the electric motor 3 is driven, in step S18, whether the corresponding timer is turned ON operation switch SW ₁ before the time is up, or, in step S20, the corresponding timer until the time is up Are the driving of the electric motor 3 and the corresponding display means (LED ₁ to
The blinking display of one of the LEDs ₃ ) is continued.

When the electric motor 3 is driven, the crushing blade body 10 that is co-rotatably mounted on the rotor shaft 3a of the electric motor 3 via the attachment 9 is provided with a setting switch S.
W ₂ by only the high-speed rotation time corresponding to the grinding time in the grinding mode set, the object to be crushed which is accommodated in the container 5 (tea leaves) ground to a powder.

[0050] Then, in step S18, the corresponding timer operation switch SW ₁ is turned ON before the time is up
If this is done, or if the timer in step S20 has expired, a command signal for stopping the electric motor 3 is output from the microcomputer 17 to the drive circuit 22 via the output circuit 21. Receives the command signal, stops supplying the commercial power to the electric motor 3, and stops the electric motor 3 (step S in FIG. 10).
21).

After the supply of the commercial power is stopped, the display means ( _{one of the} LEDs _{1 to 3} ) corresponding to the set grinding mode blinks until the motor 3 stops rotating due to inertia. while continuing said When the motor 3 is completely stopped, turned all the display means LED ₁ ~LED ₃ (see FIG. 10 step S22). As described above, after the crushing process of the material to be crushed (tea leaves) is completed, the display means L
In a state where the ED ₁ ~LED ₃ lit all, even if ON operating the operation switch SW ₁ and the setting switch SW _2,
The operation is not accepted (see step S23 in FIG. 10).

Therefore, when the pulverizing process is performed again after the pulverizing process of the object to be pulverized (tea leaves) is completed, the lid 7 must be closed as shown in FIG.
It turns rightward from the state shown in FIG.
locking projections 2a, 2b locked in the locking groove 8b of FIG.
Is moved to the position of the engaging groove 8a through the communication groove 8c. In this state, the cover 7 is removed from the casing 1, the pressing of the pressing rod 13 by the pressing protrusion 8d is released, and the protection switch LS is once turned off. (See step S24 in FIG. 10) or by unplugging a power plug (not shown) from the outlet (step S24 in FIG. 10).
25), and the microcomputer 17 in step S26 in FIG.
The reset (all the display unit LED ₁ ~LED ₃ is turned off).

After the crushed object in the storage container 5 is taken out or the crushed state of the crushed object in the storage container 5 is checked, the lid 7 is attached to the casing 1 again. Accordingly, by turning ON the protective switch LS via the push rod 13, in this state, to set the grinding mode by setting switch SW _2, and, by ON operation of the operation switch SW _1, to drive the electric motor 3 milling The blade 10 is rotated to crush the object to be crushed.
Thereafter, when the pulverization of the object to be pulverized is performed, the above operation may be repeated.

As described above, in the present invention, the lid 7
To the casing 1, that is, the locking projections 2a and 2b protruding and formed on the inner peripheral surface of the casing 1 are
The protection switch LS is turned ON via the pressing rod 13 in conjunction with the operation of engaging with the locking groove 8a of the engaging portions 7a, 7b formed on the outer peripheral surface of the pressing rod 13. Are engaged with the engaging projections 2a, 2b and the engaging portions 7a, 7b.
And the lid 7 is pressed in a state in which the lid 7 is securely attached to the casing 1. As a result, the lid 7 comes off the casing 1 due to vibration or the like during the operation of the tea grinder A. There is no possibility that the ON state of the protection switch LS cannot be maintained unless the ON state of the protection switch LS is released or the lid 7 is constantly pressed toward the casing 1, and the ON state of the protection switch LS is maintained well. can do.

As described above, until the cover 7 is attached to the casing 1, the protection switch LS is not turned on, that is, the commercial power is not supplied to the electric motor 3 and the control device 15. SW ₁ is ON
Be operated, the operation ON operation of the switch SW ₁ is not accepted, and, since the electric motor 3 is also not driven in the state of removing the lid 7 from the casing 1, it is performed such as cleaning tea grinder A when accidentally be pressed operation switch SW _1, it is without any of the motor 3 is driven grinding blade 10 starts to rotate, safe cleaning or the like of the tea mincer a body or container 5 Can be done.

[0056] Furthermore, until setting the milling mode of grinding object (milling time) by setting switch SW _2, since the operation ON operation of the switch SW ₁ is not accepted, setting the grinding mode in advance grinding object Accordingly, during the grinding the grinding object, along with the burden that must continue pressing the operation switch SW ₁ can be reliably eliminated, by milling mode set in advance until the object to be crushed is crushed, other It is very convenient because work can be performed.

During the operation of the tea grinder A, the display means L
Of ED _{1 ~LED 3,} only displays blinking display means LED ₁ ~LED ₃ corresponding to the grinding mode set, with tea grinder A displays that in operation, the corresponding timer has timed after, the motor 3 is until stopped from a state that is rotated by inertia, since it is configured to continue the flickering display of the relevant display unit LED ₁ ~LED _3, to easily view the operating conditions of the tea grinder a In addition, while the motor 3 is coasting,
By removing the lid 7 from the crushing blade 10, it is possible to reliably prevent the crushing blade body 10 from injuring a finger or the like and the crushed material in the storage container 5 overflowing.

[0058] Furthermore, after once pulverized in the pulverized product is completed. Thus prohibit the acceptance of the operation switch SW ₁ and the setting switch SW _2, the operation switch SW ₁ is turned ON immediately after the stop motor 3 Then, it is possible to satisfactorily prevent the electric motor 3 from being adversely affected by re-energizing the electric power to the electric motor 3.

In the embodiment of the present invention, an example in which tea leaves such as green tea are pulverized has been described. However, the present invention is not limited to this, and solid foods such as coffee beans and dried vegetables are pulverized. Of course, it can also be used in such cases. Further, in the embodiment of the present invention, an example was described in which a power plug (not shown) of the tea grinder A was connected to an outlet, and then the lid 7 was attached to the casing 1. After attaching the lid 7 to the power supply 1, a power plug (not shown) may be connected to an outlet.

[0060]

As described above, according to the present invention, the operation of engaging the locking projection protrudingly formed on the inner peripheral surface of the casing with the locking groove of the engaging portion concavely formed on the outer peripheral surface of the lid body. In conjunction with this, the pressing rod of the protection means is pressed by a pressing projection projecting downward from the engaging portion and formed, and the protection switch is turned ON via the pressing rod, so that the pressing rod is As a result of the lid being pressed by the pressing projection in a state in which the lid is securely attached to the casing using the locking projection and the engaging portion, the lid is detached from the casing due to vibration or the like during operation of the tea grinder, and the protection switch is provided. The ON state of the protection switch cannot be maintained at all unless the ON state of the protection switch is released or the lid is constantly pressed to the casing side, and the ON state of the protection switch can be maintained satisfactorily.

When the cover is not attached to the casing, the protection switch inserted between the commercial power supply and the control device is not turned on, so that the commercial power is not supplied to the control device, that is, the control device is not supplied with power. Since the microcomputer does not operate, the operation switch may be turned on by mistake when cleaning the tea grinder with the lid removed from the casing.
Even if the N operation is performed, the electric motor is driven by the ON operation of the operation switch, and the crushing blade does not start rotating, so that the cleaning of the main body of the tea grinder and the storage container can be performed safely.

Further, a display means for individually displaying the crushing mode set by the setting switch is provided. By illuminating the display means, it is possible to determine which crushing mode is currently set. By blinking the display, it is possible to see at a glance which grinding mode is being operated. In addition, after the timer corresponding to the crushing mode set by the setting switch has timed out, the blinking display of the display means is continued until the motor stops rotating from the state of inertia due to inertia. By removing the lid from the casing while rotating due to inertia, it is possible to reliably prevent problems such as injuries of fingers etc. due to rotation of the crushing blade and overflow of the crushed material in the storage container Becomes possible.

In addition, unless the control device sets the pulverization mode (pulverization time) of the object to be pulverized by the setting switch,
Since the ON operation of the operation switch is not accepted, the tea grinder can be automatically operated by setting the operation mode of the operation switch ON and driving the electric motor after setting the grinding mode of the object to be ground in advance. As in the prior art, it is possible to satisfactorily solve the inconvenience of having to hold down the operation switch while crushing the object to be crushed, and to reduce the time until the object to be crushed by the preset crushing mode. In the meantime, other operations can be performed, which is very convenient.

Further, the control device inhibits the ON operation of the operation switch and the acceptance of the setting operation of the crushing mode by the setting switch once the crushing process of the crushed object is completed. Operation switch is ON
By being operated and the commercial power being re-energized to the electric motor, it is possible to satisfactorily prevent the electric motor from suddenly starting and adversely affecting the electric motor.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a state in which a lid is removed from a casing in a food grinding device of the present invention.

FIG. 2 is a longitudinal sectional view showing a main part of the food crushing apparatus of the present invention by cutting out the main part.

FIG. 3 is a plan view of the food crushing apparatus showing a state in which a lid is removed from a casing.

FIG. 4 is a cross-sectional plan view of the lid.

FIG. 5 is an exploded perspective view showing a lid and a casing.

FIG. 6 is an exploded perspective view showing the protection means.

FIG. 7 is an explanatory diagram for explaining an operation of attaching the lid to the casing.

FIGS. 8A and 8B are explanatory diagrams for explaining the operation of the protection means, wherein FIG. 8A shows the state before the operation and FIG. 8B shows the state after the operation.

FIG. 9 is a block diagram schematically showing a control device of the food grinding device.

FIG. 10 is a flowchart for explaining the operation of the food grinding device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Casing 1c Protrusion wall 1d Window hole 2a, 2b Locking projection 3 Electric motor 4 Support member 5 Storage container 7a, 7b Engaging part 8a Engaging groove 8b Locking groove 8c Communication groove 10 Crushing blade 11 Operation panel 12 Protecting means 13 Push rod 15 Control device A Food grinder (tea grinder) SW ₁ operation switch SW ₂ setting switch LS protection switch LED _{1 to} LED ₃ display means

Claims (6)

[Claims] 1. A casing formed in a hollow cylindrical shape with an open upper part, a storage container mounted on the upper side of the casing and storing a material to be crushed to be crushed, and housed in the storage container. A pulverizing blade for rotating and pulverizing the object to be pulverized, an electric motor accommodated in the casing for driving the pulverizing blade to rotate, a lid detachably attached to an opening of the casing, and the electric motor A food crushing device comprising an operation switch for driving the crushing of the crushed material, and a setting switch for setting a crushing mode of the crushed material. A display means for displaying the crushing mode set by the setting switch; and, when the cover is not attached to the casing, the electric motor is driven by turning on the operation switch. A food crushing device, comprising: a protection unit for preventing the operation of the operation switch and the setting switch; and a control unit for controlling the operation of the electric motor and the display unit in response to the ON operation of the operation switch and the setting switch. 2. A pair of locking projections and auxiliary projections are protruded and formed on an inner peripheral surface of the casing, and an outer peripheral surface of a lid detachably attached to the casing is
A pair of engaging portions with which the locking protrusions are engaged and a pair of engaging grooves with which the auxiliary protrusions are engaged are respectively recessed, and one of the pair of engaging portions is pressed. A projection is formed by projecting and forming downward, and in conjunction with an operation of engaging the locking projection and the auxiliary projection with the engagement portion and the engagement groove, the protection means is configured to be pressed and operated by the pressing projection. The food crushing device according to claim 1, wherein: 3. The protection means is turned on only when the lid is attached to the casing, and is linked with a protection switch for supplying commercial power to the control device and the electric motor, and in conjunction with the operation of attaching the lid to the casing. ON the protection switch
The food crushing device according to claim 1, further comprising a pressing rod that is operated. 4. The display means is configured to individually display and display a grinding mode set by a setting switch, and blinks the display means corresponding to the grinding mode set by the setting switch during driving of the electric motor. The food crushing method according to claim 1, wherein the display is configured such that when the electric motor is stopped, the blinking display is continued until the electric motor completely stops from a state in which the electric motor is rotating due to inertia. apparatus. 5. The control device according to claim 1, wherein when the operation switch is turned on before the pulverizing mode is set by the setting switch, the motor is prevented from being driven. Food crushing device as described in the above. 6. The control device prohibits reception of a setting operation of a crushing mode by a setting switch and an ON operation of an operation switch until the control device is reset after the crushing process of the crushed object is once completed. The food crushing device according to claim 1, wherein the food crushing device is used.