JPH0321712Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to an electric mixer for cutting and stirring food materials.

Prior Art Generally, in this type of electric mixer, a cutter is rotated by the drive of a commutator motor, and the cutter cuts and stirs the material placed in the bottle.

Problems that the invention aims to solve However, in the case of conventional electric mixers, the direction of rotation was only in one direction, so the fibers of the material tended to wrap around the cutter shaft, making it troublesome to remove. There was a risk of cutting one's hand with the cutter's blade, and the cutting and stirring performance of the material was not very good. In addition, some devices are designed to improve cutting and stirring performance by varying the rotation speed, but they are also done by switching between different types of field cores, or by using semiconductor elements (diodes, thyristors, etc.). Since this method uses a method of changing the input using a 3D converter, there are problems in that the wiring etc. are complicated and the cost is high.

Means for Solving the Problems In order to solve these problems, the electric mixer of this invention rotates the cutter by driving a commutator motor to cut and stir the material contained in the bottle container. In order to enable forward and reverse rotation of the commutator motor, a changeover switch is provided between the field coil and the armature coil to change the connection direction of the armature coil to the field coil, and a switch is provided between the field coil and the armature coil to change the connection direction of the armature coil to the field coil. The feature is that the brush is set at a position offset from the median line so as to change the rotation speed during rotation.

According to this method, first, the commutator motor is rotated in the forward direction to cut and stir the inside of the bottle with the cutter, and then the connection direction of the armature coil to the field coil is reversed to the direction in which the armature coil is connected to the field coil using the changeover switch. Turn it in the opposite direction. At this time, since the brush is shifted from the median line, the efficiency is different between forward rotation and reverse rotation, and the rotation speed is different. In this way, it is possible to enable forward and reverse rotation with a simple structure that requires only a new changeover switch, and at the same time, the rotation speed can be varied, improving material cutting and stirring performance compared to conventional methods. That will happen. Furthermore, for example, if fibers of the material wrap around the cutter during forward rotation, the fibers can be removed by rotating the cutter in reverse, saving the effort of cleaning and eliminating the need to cut one's hands, improving usability.

Example This invention will be explained below based on examples.

1 to 5 are diagrams showing an embodiment of this invention.

First, to explain the configuration, reference numeral 1 in FIG. 2 is a mixer main body, and this main body 1 is provided with an upper case 2 and a lower case 3, and a commutator motor M is provided inside, and a motor connected to the motor M is connected to the mixer main body 1. An off switch X, a forward rotation switch Y, and a reverse rotation switch Z are provided. A bottle support section 4 is removably provided on the upper case 2.
A bottle container 5 is attached to the bottle container 5, and a lid 6 is detachably attached to the bottle container 5.

As shown in FIG. 3, the connection part between the bottle support part 4 and the bottle container 5 is such that the lower end part 5a of the bottle container 5 is screwed into the upper end part 4a of the bottle support part 4. A bearing support 9 is fixed between the upper surface 4b of the bottle container 5 and the lower end surface 5b of the bottle container 5 via an upper packing 7 and a lower packing 8. A spindle 10 is rotatably provided on the cylindrical portion 9a of the bearing support 9 via a bearing 11, and two cutters 12 and 13 are fixed to the upper end 10a of the spindle 10 that projects into the bottle container 5. Meanwhile, an upper coupling 15 is attached to the lower end portion 10b protruding into the bottle support portion 4 with a mounting screw 14.
is fixed. This upper coupling ring 15
is freely engageable and detachable from the lower coupling fixed to the commutator motor M, and the commutator motor M is
It is designed to be connected to the cutter 12 via these.

FIG. 1 is a circuit diagram of the commutator motor M. When the forward rotation switch Y on the case is pressed, the power switch SW turns on, and in conjunction with this, both contact pieces a ₁ , a of the changeover switch W are turned on. ₂ are contacts c ₁ and b ₁ respectively
The commutator motor M is in contact with the field coil
L ₁ , brush B ₁ , armature coil A, brush
It becomes a circuit connecting B ₂ and field coil L ₂ , and is rotated clockwise (forward rotation), for example. on the other hand,
When reverse switch Z is pressed, power switch SW turns on.
Simultaneously with this, both contact pieces a ₁ and a ₂ of the changeover switch W come into contact with the contacts c ₂ and b ₂ , respectively, and the commutator motor M, unlike the above, has a field coil L ₁ , a brush B ₂ , the armature coil A, the brush B ₁ , and the field coil L ₂ are connected to each other, and the circuit is rotated to the left (reverse rotation) in the opposite direction to the above. In this way, by changing the connection direction of the armature coil A to the field coils L ₁ and L ₂ using the changeover switch W, it is possible to
Reverse rotation is possible. In the figure, the symbol V is a power supply, and the symbol C is a noise prevention capacitor.

By the way, generally in commutator motor M,
To prevent sparks, the brushes B ₁ and B ₂ are set at positions slightly offset from the mechanical center line (median line) in the counter-rotational direction. (See) In this embodiment, the rotation direction is shifted in the opposite direction.

On the other hand, the cutters 12 and 13 are made of iron alloy such as stainless steel, porcelain such as ceramics, or synthetic resin. For example, as shown in FIGS. 3 to 5, one cutter 12 has plate parts on both sides. 12a is bent upward, and the plate portions 13a on both sides of the other cutter 13 are bent downward. These cutters 12 and 13 have continuous straight cutting blades 12b and 13b on the edge of the plate portions 12a and 13a in the forward rotation direction, and cutting blades 12c and 13b continuous in a wavy shape on the edge of the plate portions 12a and 13a in the reverse rotation direction. 13c
are formed respectively.

Next, the operation of the electric mixer having such a configuration will be explained.

First, when the forward rotation switch Y is pressed, the power supply side switch SW shown in Fig. 1 is turned ON, and at the same time, the contacts a ₁ and a ₂ of the changeover switch W contact the control points c ₁ and b ₁ , respectively, and the field coil L ₁ , brush B ₁ , armature coil A, brush B ₂ , field coil L ₂
The commutator motor M rotates in the forward direction. This rotation causes the cutters 12 and 13 inside the bottle container 5 to rotate via the lower coupling 15, the upper coupling 15, the spindle 10, and the like. Then, the cutting blades 12b and 13b of the cutters 12 and 13 in the forward rotation direction cut the material inside the bottle container 5, and the material is rotated and stirred within the bottle container 5.

From this state, when the reverse rotation switch Z is pressed this time, the forward rotation switch Y is released, and the power supply side switch _SW in _{FIG .} b ₂ and forms a circuit connecting field coil L ₁ , brush B ₂ , armature coil A, brush B ₁ , and field coil L ₂ .
According to this, the connection direction of the armature coil A to the field coils L ₁ and L ₂ is opposite to that described above, so that the rotation is reversed. At this time, brush
Since the B ₁ and B ₂ positions are set to positions that are moved in the reverse rotation direction with respect to the median line for forward rotation,
Large deviation from the electrical center line during reverse rotation,
The efficiency is lower and the rotational speed is slower than during the normal rotation. This reverse rotation causes the cutters 12, 13 to rotate in the opposite direction via the upper coupling ring 15, spindle 10, etc., and the material is cut by the cutting blades 12c, 13c on the reverse rotation side.

In this way, by selecting the forward/reverse rotation switches Y and Z, the rotation direction and rotation speed can be changed. It can be removed by rotating it in the opposite direction, saving you the trouble of cleaning this part.
This is very convenient, and also prevents cutting of the hands with the cutters 12, 13, etc., resulting in good usability.

In addition, with a simple configuration that only requires forward/reverse rotation switches Y, Z, changeover switch W, etc., the rotation direction and rotation speed can be changed, and by changing the form in which the material is cut, it is possible to cut the material. - Stirring performance will be improved.

Furthermore, there are various modifications of the cutter as shown in FIGS. 6 to 23.

First, cutter 2 shown in Figures 6 to 8
2 and 23 are substantially plate-shaped cutter bodies 22a and 23;
A cutting blade 22b is provided only on the edge of the positive rotation direction of a.
23b is formed, and the end edge 22 on the reverse rotation direction side
23c and 23c are simply punched out using a press or the like, and serve as a stirring section. According to this, during forward rotation, the material is cut by the cutting blades 22b and 23b, while during reverse rotation, as shown in FIG. The area shown becomes negative pressure, and bubbles are formed in the material due to the gas inside the bottle container 5 being drawn in, cavitation inside the material, etc. It is effective to use this for foaming dishes, and at the same time It is also possible to cut the material at the edges 22d, 23d of the end edges 22c, 23c.

Cutters 32, 3 shown in FIGS. 9 and 10
3, cutting blades 32b, 33 are provided on the edge portions of the substantially plate-shaped cutter bodies 32a, 33a on the forward rotation direction side.
b is formed, while stirring portions 32c and 33c are formed at the edge portion on the reverse rotation direction side.
The stirring parts 32c, 33c are formed by being bent substantially at right angles to the general plane by pressing or the like, and the stirring of the material is performed with good performance, especially when rotating in reverse. Of course, during normal rotation, the material is cut by the cutting blades 32b and 33b, improving cutting and stirring performance.

If the bending angle of the stirring parts 32c, 33c is 90 degrees, the resistance will be too large and the commutator motor M will be overloaded.If the angle is smaller or larger than 90 degrees, the commutator motor The load can be made to correspond to the performance of M. Further, the stirring portions 32c and 33c are connected to the cutter 3.
Although it is formed continuously on the edge of 2 and 33,
Of course, it may be formed in several locations.

The cutter 42 shown in FIGS. 11 to 14,
43, cutting blades 42b and 43b are formed on the forward rotation direction side of the substantially plate-shaped cutter bodies 42a and 43a, while a stirring section 4 is formed on the reverse rotation direction side of the cutter 42.
2c is provided. This stirring part 42c is a support part 42d formed by punching in a press process.
The end portion of a plate-shaped flap portion 42e is rolled up and rotatably attached to the flap portion 42c, and stoppers 42f and 42g are formed by cutting and raising the flap portion 42c. Further, as shown in FIG. 13, this flap portion 42e
The tip portion 42h is tilted so as to be located slightly upward in the figure.

During forward rotation, the cutting blades 42b and 43b cut the material, and at this time, the flap portion 42e of one cutter 42 is cut by the stopper 42g coming into contact with the cutter body 42a as shown in FIG. It becomes substantially flush with the cutter main body 42a, and the material can be cut without generating much resistance. On the other hand, during reverse rotation, the flap portion 42e is inclined from the above state, so that
This portion receives resistance and the flap portion 42e is rotated, and the stopper 42f comes into contact with the cutter body 42a as shown in FIG. 14, thereby holding the flap portion 42e in an upright state. This flap portion 42e allows the material to be stirred during reverse rotation.

The cutter 52 shown in FIGS. 15 and 16,
53, the cutter bodies 52a, 53a are provided to be inclined with respect to the rotation direction, and the cutter bodies 52a, 53a
Cutting blades 52b, 5 are provided at the edge of the forward rotation direction side of 3a.
3b is formed, and a total of three holes 52c, 5 are formed.
3c is drilled. According to this, during forward and reverse rotation, the material passes through the holes 52c and 53c and is stirred, but the cutter bodies 52a and 5
3a, the holes 52c, 5
The material can easily pass through 3c, and the stirring performance is further improved. Further, the corners of the holes 52c and 53c are also useful for crushing materials. In addition, by bending the end edges 52d and 53d of the cutters 52 and 53 in the reverse rotation direction as shown in FIG. 17, the strength can be increased and at the same time, turbulence can be generated to further improve the stirring performance. I can do it.

Examples of holes provided in this manner include those shown in FIGS. 18 to 23, and the one shown in FIG. 18 has a small diameter hole 6 near the center.
2c and 63c are large diameter holes 62d and 6 near the outer periphery.
On the other hand, in the case shown in FIG. 19, large diameter holes 72c and 73c are formed near the center, and small diameter holes 72d and 73d are formed near the outer periphery. Further, in FIG. 20, circular holes 82c and 83c are provided near the center, and star-shaped holes 82 are provided near the outer periphery.
d, 83d are formed. Then, in the holes 52c, 53c, etc., as shown in FIG. 21, for example, the peripheral edge of the hole is made to protrude to form a blade part 101 by press punching, or, for example, as shown in FIG. 22, a blade part 101 is formed. By forming the blade portion 102 using the same method, the cutting performance of the material can also be improved. Furthermore, by forming the holes 52c, 53c, etc., the weight of the cutter itself can be reduced.

Effects of the invention As explained above, according to this invention,
With a simple structure, it is possible to rotate the commutator motor in the forward and reverse directions, and the rotation speed can also be changed, improving the cutting and stirring performance of materials, and preventing the fibers of the materials from becoming entangled. This has the practical effect of saving the effort of cleaning and improving usability.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the electric mixer of this invention, in which Figure 1 is a circuit diagram of a commutator motor, Figure 2 is a perspective view of the electric mixer, and Figure 3 is a perspective view of the electric mixer.
4 is a plan view of the cutter, FIG. 5 is a sectional view taken along the line - in FIG. 4, and FIGS. 6 to 22 are sectional views of the cutter. Figure 6 is a plan view of the first type of cutter, and Figure 7 is a diagram showing other examples of several types of cutters.
The figure is a sectional view taken along the - line in Fig. 6, Fig. 8 is a sectional view showing the action of the cutter shown in Fig. 6, Fig. 9 is a plan view of the second type of cutter, and Fig. 10 is a sectional view of the cutter shown in Fig. 6.
Figure 11 is a plan view of the third type of cutter, Figure 12 is an enlarged view of section K in Figure 11, Figure 13 is a cross-section taken along line - in Figure 12. Fig. 14 is a sectional view similar to Fig. 13 showing a state in which the flap part has been rotated, Fig. 15 is a plan view of the fourth type of cutter, and Fig. 16 is a sectional view taken along the - line of Fig. 15. , FIG. 17 is a sectional view similar to FIG. 15 showing a modified example of the hole of the cutter shown in FIG. 15, and FIGS. 21 and 22 are sectional views of the hole in which a blade portion is formed, respectively. 5... Bottle container, 12, 13, 22, 23,
32, 33, 42, 43, 52, 53... cutter, A... armature coil, B ₁ , B ₂ ... brush, L ₁ , L ₂ ... field coil, M... commutator motor, W ...changeover switch.

Claims (1)

[Claims for Utility Model Registration] (1) In an electric mixer that cuts and stirs material contained in a bottle container by rotating a cutter driven by a commutator motor, the commutator motor can be rotated in forward and reverse directions. Preferably, a changeover switch is provided between the field coil and the armature coil to change the connection direction of the armature coil to the field coil, and to change the rotation speed between forward rotation and reverse rotation. An electric mixer characterized by having a brush set at a position offset from the median line. (2) Utility model registration request for a cutter characterized in that a cutting blade is provided on the edge of the substantially plate-shaped cutter body on the forward rotation side, and a stirring portion is provided on the edge of the cutter body on the reverse rotation side. The electric mixer according to item 1. (3) The cutter is characterized in that a substantially plate-shaped cutter main body is inclined with respect to the rotational direction, and a hole is bored in the cutter main body, as set forth in claim 1 of the utility model registration claim. electric mixer.