JPS63158024A - Electric coffee maker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electric coffee brewer that grinds coffee beans and automatically extracts coffee.

(Prior Art) In general, there has been a demand for an electric coffee boiler having a coffee bean grinding function that is easier to operate, retains the flavor of the coffee, and allows you to drink delicious coffee.

For this reason, conventional electric coffee boilers
For example, as shown in FIGS. 8 and 9, there is a system in which coffee beans are ground and coffee is immediately extracted automatically.

(Problems to be Solved by the Invention) In the conventional electric coffee boiler described above, as shown in FIG. Because a coarse metal mesh filter is used, fine coffee bean powder gets mixed into the extract, making it cloudy and unpleasant to the touch.Furthermore, even when cleaning the mesh filter after use, coffee powder residue remains on the mesh filter. There were problems such as clogging and difficulty in washing with water. Also, as shown in Figure 9, the crushing section and extraction section are arranged side by side,
After the coffee beans are ground and the coffee powder is sequentially transferred to the extraction section using centrifugal force, the transfer is completed.

Automatic extraction methods are uneconomical because fine coffee powder adheres to the grinding section and the inner surface of the lid that covers the grinding section and extraction section due to static electricity, and the amount is not extracted. In addition, there are many parts to be cleaned after use, which is troublesome.

In view of the above-mentioned conventional problems, the present invention effectively arranges coffee bean grinding bodies to enable continuous entry of coffee beans into the grinding chamber, is easy to operate, and prevents the flavor of coffee from escaping. First, we provide an electric coffee boiler that can brew delicious coffee.

(Means for solving the problem) A substantially funnel-shaped storage for storing coffee beans, and a motor that protrudes from below into the storage and is rotated by a motor in a space partitioned by an upper wall and a side wall. A bean grinding chamber having a cutter, a communication port provided in the side wall to communicate the storage and the grinding chamber, a porous filter placed at the bottom of the grinding chamber, and an extraction communicating with the grinding chamber through this filter. It consists of a chamber, a tank that stores water, and a heater that draws out the water in the tank, heats it, and discharges the hot water to the storage, and the upper wall of the crushing chamber becomes the inner bottom surface of the storage. This is what I did.

(Function) According to the above configuration, the vibration shock during grinding of coffee beans is directly applied to the coffee beans in the storage through the upper and side walls of the grinding chamber, and as a result, the coffee beans in the storage are It moves smoothly from the storage to the grinding chamber through the communication port without creating a bridge.

It is continuously ground at a reasonable speed and allows for the extraction of delicious coffee liquid.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 7.

First, Fig. 7 shows the appearance of the coffee brewer, where 32 is the main body A, 24 is the main body B, 11 is the main body cover, and 1 is the main body A.
3 is the lid of the coffee bean inlet, 26 is the coffee extraction chamber, 3
1 is a water tank.

Next, in FIG. 1, reference numeral 1 denotes a grinding chamber, which is equipped with a grinding cutter 3 that is rotationally driven by a motor 2, and a porous filter 4 at the bottom that allows only powder that has been ground to a predetermined particle size to pass through. ing. The grinding chamber 1 is arranged in a substantially funnel-shaped coffee bean storage 5 that is open at the top and protrudes from the bottom. A side wall portion 1b and a cutter 3 forming a boundary and having a communication port 6 with the storage 5 at a lower position thereof.
An independent space area is formed by the partition wall 1c through which the rotation axis of the partition wall 1c passes.

At the top of the coffee bean storage 5, a discharge lower that spouts hot water is arranged. A waterproof gasket 8 prevents hot water discharged into the crushing chamber 1 from entering the motor 2 side through the rotation shaft hole of the partition wall 1c.

Reference numeral 9 denotes a vibration isolating rubber which absorbs vibrations generated when the motor is driven via the motor mounting bracket 10. Reference numeral 11 denotes a main body cover, which has a coffee bean inlet 12 on its upper surface, and the inlet 12 is equipped with a lid 13 that can be opened and closed.

M13 protrudes in a substantially dome shape at the upper part of the inlet 12, and a cylindrical rib 14 is formed around it, so that when hot water is spouted into the coffee bean storage 5, the hot water flows between m13 and the inlet 12. This prevents it from leaking through the gaps. The lid 13 is also provided with a steam hole 16 whose outer periphery is surrounded by ribs 15. Furthermore, a portion 17 having a generally circular cross section is formed at one end of the lid 13, and a protrusion 18 that fits along the approximately circular cross section 17 is formed on the main body cover 11.
A protrusion 20 along the circular arc portion 19 on the outer periphery of the end surface of the main body cover 11 is provided on the main body cover 11 and constitutes a hinge portion 21. 22.
A waterproof seal 23 is configured to prevent water and steam from entering the main body and absorb vibrations generated when the motor 2 is driven. Filter 4 is.

It is formed integrally with a filter holder 25 that is detachably attached to the main body 1324 with screws (not shown), so that the interior of the crushing chamber 1 can be easily cleaned after use.

Reference numeral 26 designates a coffee brewing chamber, on which a brewing lid 27 is removably placed, and a guide portion 29 is formed on the side surface to lift the brewing chamber 26 obliquely upward along guide ribs 28 formed on the main body B24 when inserted. ing. The extraction lid 27 has
A powder seal 30 made of an annular elastic body with an inverted U-shaped cross section is integrally provided, and when the extraction chamber 26 is inserted into the main body B24,
It is elastically fitted to the end face of the filter holder 25 to prevent powder and hot water from leaking from the fitting part.

In Fig. 2, 31 is a tank containing water, and the main body A
32 and can be attached and detached freely. The upper surface of the water tank 31 is covered with an eaves portion 33 extending from the main body B24 when stored, and is elastically fitted to a spring 34 to prevent separation from the main body. Also, when the water tank 31 is stored, it is connected to the main body A via the valve 38.
It communicates with a sensing chamber 35 provided in 32. Sensitive room 3
A thermostat 36 and a check valve 37 are attached to the bottom wall of the housing 5, and the thermostat 36 is arranged so that its sensing portion faces the sensing chamber 35. 39 is a heater, which heats water drawn out from the water tank 31 in a heating section 40;
This is to push hot water up to the flow path switching chamber 42 through the water riser pipe 41 and to keep the coffee liquid warm after the extraction is completed. Note that 66 in FIG. 6 is a thermostat that controls the temperature of the heater 39 to keep it warm. The flow path switching chamber 42 has an inflow path 43 for hot water and an outflow path 4 that opens toward the tank 31 side.
4, an outflow path 45 that opens toward the coffee bean storage 5 side shown in FIG.
a lever 47 that is operated from the outside of 2 using a as a fulcrum;
It consists of a flexible body 48 that moves in conjunction with the operation of the lever 47. One end 49 of the lever 47 is constantly urged clockwise by a spring 50 to close the outflow path 45.

Reference numeral 51 designates a time switch, which includes a timer motor 52 for timed operation, and switches S and a for selectively switching the main power supply to the heater 39 circuit or the timer motor 52 and motor 2 circuit shown in FIG.

S2b, a switch S2 interposed in the timer motor 52 circuit, a switch S2 interposed in the motor 2 circuit,
Built-in. Further, the heater 39 circuit, the timer motor 52, and the motor 2 circuit are connected through a thermostat 36 that is turned on when a predetermined temperature is reached. The time switch 51 also has a cam 54 on the main shaft 53 for time setting.
is attached, and an operating rod 56 is driven via an arm 55 in connection with a timed operation. When the peak of the cam 54 and the arm 55 are in contact with each other, the operating rod 56 pushes the lever 47 mentioned above against the spring 50 to close the outflow path 44.
Also, if the valley of the cam 54 and the arm 55 are in contact with each other,
The outflow path 45 is configured to be closed.

As shown in FIG. 3, the cam 54 has three peaks 57.
58, 59 and three valleys 60, 61, 62 are formed to sequentially switch the flow path in conjunction with a timed operation. Furthermore, a recess 63 is formed in the cam 54, and is integrally formed with a lock knob 64 that locks the lid 13 in the closed state when the main power is turned off. The lock lever 67 is arranged to face the tip 68 of the biased lock lever 67, and the lid 13 cannot be opened unless the time switch is turned off. 69 is a start knob for turning on the main power after setting the time limit.

In FIG. 4, 70 is a mounting plate on which the time switch 51, lock lever 67, etc. are mounted. 71 is a safety switch connected in series to the main power circuit, and when M13 is closed, it is closed via a push rod 73 attached to the main body cover 11 and always urged upward by a spring 72. Alternatively, the screw 72 also has the function of popping up M13 when the lock knob 64 and M13 are released.

In the above configuration, coffee beans are placed in the storage 5 and the lid 1 is
3, put water into the tank 31, put the extraction chamber 26 into the predetermined position, and set the time switch 51 to the predetermined time limit, and then press the start knob 69, the switch Slb
is closed and the motor 2 starts to drive, and the timer motor 52 starts a timed operation. At this time cam 5
The trough 60 of No. 4 comes into contact with the arm 55, opening the outflow path 44. After the coffee beans are sequentially crushed and discharged to the extraction section 26, the switch Sib is switched to Sia,
When the motor 2 and the timer motor 52 stop operating, the heater 39 starts being energized. At this time, the water in the water tank 31 is heated and returned to the tank 31 through the outflow path 44. When the water temperature in the tank eventually reaches a predetermined temperature, the thermostat 36 is turned on and electricity starts flowing to the motor 2 and the timer motor 52 again. With the operation of the timer motor 52, the cam 54 immediately moves to a position where the peak 57 and the arm 55 come into contact, opening the outflow path 45. Therefore, the preheated hot water becomes high temperature again by the heater 39, is discharged into the storage 5, is diffused by the motor 2 toward the wall of the storage 5, and is distributed inside the storage 5, the grinding chamber 1, and the filter holder 25. Clean the attached fine powder. After a predetermined period of time, the motor 2 is stopped by opening the switch S) by the time switch 51. After that, the timer motor 52 continues its timed operation, and the cam 54 moves further to perform the primary hot water supply in the coffee brewing procedure, and then moves to the valley 61 and blocks the outflow path 45 again to prevent so-called unevenness. is carried out for a certain period of time, and the cam moves further.

Secondary hot water supply is started with the outlet passage 45 being opened by riding on the mountain part 58, and at the same time, the switch S is opened and the timed operation of the timer motor 52 is ended. Coffee extraction continues after that, and when all the water in the tank 31 is discharged,
The thermostat 66 controls the supply of electricity to the heater 39 intermittently to keep it warm, and after use, the time switch 5
By turning 1 counterclockwise, S□a opens, and S
lb, all power supplies are opened and the power is cut off. Also by hand-crank operation.

The cam 54 moves, and the arm 55 comes into contact with the trough 62, closing the outflow path 45 and opening the outflow path 44 toward the tank 31. At the same time, the recess 63 of the cam 54 and the lock lever 6
The tips 68 of 7 are aligned in the horizontal direction, and the lid 13 can be opened by moving the lock lever 67.

Cleaning after use is completed by pulling out the brewing chamber 26, discharging the extracted coffee powder, and then cleaning it.

Naturally, cleaning and maintenance of the crushing chamber 1 and storage 5 is not necessary.

Here, it is important that the coffee beans placed in the storage S go smoothly into the grinding chamber 1 through the communication port 6 and that the grinding is completed within the set time. If coffee beans remain in the chamber 1, not only will the extract be diluted and the desired concentration of coffee liquid cannot be obtained, but also the troublesome work of draining the remaining wet coffee beans will be involved. Therefore, it is necessary to make the shape of the storage, especially the slope of the wall surface steep, so that the coffee beans can easily move to the communication port 6, but this becomes a factor that hinders the compactness of the machine body.

Therefore, in this embodiment, the upper wall 1a and the side wall 1b of the grinding chamber 1 are made part of the inner bottom surface or the inner wall surface of the storage 5, and the vibration shock when grinding coffee beans due to the rotation of the cutter is absorbed by the walls 1a, 1b. The coffee beans are directly applied to the coffee beans through the vibration, and the coffee beans are sequentially moved downward and smoothly enter the grinding chamber 1 through the communication port 6. here,
Simply enlarging the communication port 6 to allow beans to easily enter the grinding chamber 1 would result in a motor lock phenomenon due to the beans being suddenly caught in the grinding chamber 1, so in this embodiment, Without making the communication port 6 unnecessarily large, the vibration impact of grinding the beans is used to supply the beans in accordance with the grinding speed. In addition, although the upper wall portion 1a is formed so that beans can be stored thereon, the storage compartment is formed on the side wall portion 1b.
Compared to configuring only the left side of the grinding chamber, the dead space in the grinding chamber 1-A can be eliminated and the effective part of the storage compartment can be enlarged, making it possible to make the equipment more compact and reducing vibrations during grinding. The impact is effectively transmitted to the beans.

(Effects of the Invention) As is clear from the description of the embodiments, the present invention has the following effects:
By providing a grinding chamber in a protruding manner inside the bean storage, and making the upper wall and side wall of the grinding chamber part of the inner bottom surface or inner wall surface of the storage.

Vibration shock during crushing can be effectively applied to the beans through the wall, and as a result, the beans smoothly enter the crushing chamber from the communication port without forming a bridge, and are crushed continuously without strain. It has the effect of It also has the advantage of making the equipment more compact.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention, FIG. 2 is a partial sectional view of the water tank and flow path, FIG. 3 is a front view of the time switch section, and FIG. FIG. 5 is a partial sectional view of the safety switch section, FIG. 5 is a partial sectional view of the flow path switching chamber, and FIG. 6 is an electrical circuit diagram. Fig. 7 is an external view of the coffee brewer, and Fig. 8. FIG. 9 is a longitudinal sectional view of a conventional electric coffee maker. 1...Crushing chamber, 1a...Upper wall, lb...
・Side wall part, 2...Motor, 3...Cutter, 4...Filter, 5...Storage, 6...
...Communication port, 26...Extraction chamber, 31...Water tank,
39... Heater. Patent Applicant: Matsushita Electric Industrial Co., Ltd. Figure 1 1'I# Time 2 Motor 3 Cutter 4 Fitter 5...Storage t 6
・Communication port 13・＠ 26 Breakdown Figure 2 Figure 3 51 ・Time switch 54 Force IA64
Lower 7 IJ > 67 Mouth, Clever Fig. 4 71 e All switches Fig. 6 L----7--" Fig. 7 11 Nell cover 13 X 24
Small body B261 Curved condensation 31 Ice tank 32
, Police (Book A64 Locking 69゛ Start! Figure 8 Figure 9

Claims (1)

[Claims] A substantially funnel-shaped storage for accommodating coffee beans; a bean grinding chamber that protrudes from below into the storage and has a cutter rotationally driven by a motor in a space partitioned by an upper wall and a side wall; and the side wall. a communication port provided in the section for communicating between the storage and the grinding chamber; a porous filter disposed at the bottom of the grinding chamber; an extraction chamber communicating with the grinding chamber via the filter; and an extraction chamber for containing water. It is characterized by comprising a tank and a heater that draws and heats the water in the tank and discharges the hot water to the storage, and is configured such that the upper wall of the grinding chamber becomes the inner bottom surface of the storage. Electric coffee brewer.