JP3066557B2 - Coffee extractor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drip coffee extractor having an integrated mill for grinding coffee beans.

[0002]

2. Description of the Related Art In general, a so-called drip-type extractor in which coffee beans are pulverized by a mill, sent to an extraction chamber, and poured with hot water to extract coffee is generally used.

FIG. 6 shows an example of such a conventional drip-type coffee extractor with a mill, and its configuration and operation will be described below.

The main body of the coffee extractor includes a lid 61 that can be opened and closed, a water tank (not shown), and a heating device (not shown), and stores coffee beans above an extraction chamber 62 for extracting coffee. Hopper 63, coffee bean crushing chamber 64,
There is a discharge port 66 of a discharge pipe 65 for discharging hot water, and a glass container 67 for storing coffee liquid is provided below the extraction chamber 62.

[0005] An arbitrary amount of water is put into a water storage tank, sooted coffee beans are put into a hopper 63, a filter 68 is set in an extraction chamber 62, and a time switch 69 is operated to start energization. The cutter 71 fixed at the tip of the shaft rotates at high speed in the grinding chamber 64 and the coffee beans flowing from the inlet 72 into the grinding chamber 64 from the storage room for coffee beans are ground and discharged below the eyes of the filter 68. Into the paper filter in the basket. After the grinding of the coffee beans is completed, the time switch 69 is switched to the energization of the heating device, and the water in the water storage tank is discharged from the bottom through a check valve (not shown).
After being heated through a heating device, it is pushed upward by a water rising pipe (not shown) and discharged from a discharge pipe 66 to an upper portion of a hopper 63, and the crushing chamber 64 and a filter 6 are formed.
After 8, the hot water is poured into the coffee powder in the coffee basket. The coffee liquid is extracted from the paper filter, flows down, and is stored in the glass container 67.

FIG. 5 shows a conventional cutter. The conventional cutter 71 is formed by changing the bending direction one by one with four blades 73.

[0007]

However, in the above-mentioned conventional coffee extractor, the first problem is that the discharge port 66 of the discharge pipe 65 is opened toward the coffee bean storage chamber, so that the discharge is performed. Hopper 63 with hot water
The coffee powder attached to the lower portion of the crusher and the inside of the crushing chamber 64 is washed, but the coffee powder attached to the lid 61 and the upper portion of the hopper 63 that covers the upper portion of the storage compartment for coffee beans is not washed.

A second problem is that the cutter 71
The gap between the blades 73 is large, so that a large amount of coffee beans flows into the crushing chamber 64, a large load is applied to the cutter 71, and rotation unevenness occurs, so that the motor 70 must have a large power.

[0009]

According to the present invention, as a means for solving the first problem, the invention according to claims 1 to 3 is characterized in that a pulverizer having a built-in cutter for pulverizing coffee beans between an extraction chamber and a discharge pipe is provided. And a hopper to house the coffee beans,
An openable and closable lid is provided above the hopper, and a discharge pipe having an opening in the direction of the lid is provided between the hopper and the lid.

Further, in addition to the means for solving the first problem, a second
As means for solving the above problem, the invention according to claims 4 and 5 is characterized in that a cutter for crushing coffee beans is formed with eight projections at the tip of a metal disk, and two pairs are formed from the other two pairs. Longer and inclined to the motor side, the other pair is formed shorter than the above two pairs and also inclined to the motor side, and the other pair is inclined and bent toward the inlet side of the coffee bean crushing chamber. ,
In addition, the inlet of the coffee beans between the hopper and the grinding chamber is provided so as to be shifted in the rotation direction side from the rotation center of the cutter.

[0011]

In the structure of the first means for solving the above problems, the hot water discharged from the discharge pipe cleans the coffee powder attached to the inner surface of the lid and the upper part of the hopper.

Further, in the structure of the second means for solving the problems, the inflow of coffee beans is restricted, the impact at the time of grinding is reduced, the rotation unevenness is reduced, the load is small, and the motor can be operated with a small power. And the noise of crushing coffee beans is reduced.

[0013]

1 and 2, reference numerals 1, 2 and 3 denote a coffee extractor main body, 4 a lid, 5 a dome-shaped portion of a lid (hereinafter referred to as a shower dome), and 6 a hopper. , 7 is a crushing chamber, 8 is a motor, 9 is a cutter, 1
Reference numeral 0 denotes an inlet for coffee beans, 11 denotes a filter, 12 denotes an extraction chamber, 13 denotes a glass container, 14 denotes a switch unit, and 15 denotes a water storage tank. The steps of setting an arbitrary amount of water and coffee beans and setting a paper filter in the extraction chamber 12 to extract coffee are the same as those in the related art, and a description thereof will be omitted.

The first characteristic configuration of this embodiment lies in the discharge pipe and its peripheral configuration. That is, as shown in FIG. 1, a shower dome 5 that covers the entire upper opening of the hopper 6 with a part of the lid 4, and the opening of the discharge pipe 16 is arranged between the hopper 6 toward the inside of the shower dome 5, The discharge pipe 16 is integrally fixed to the lid 4 and the shower dome 5 and is configured to open and close. And a hopper between the discharge pipe 16 and the extraction chamber 12.
6 and the crushing chamber 7 are disposed, so that the discharge port of the discharge pipe 16 is provided.
Hot water is not blocked by the hopper 6 or the crushing chamber 7
Coffee beans adhering to shower dome 5 and hopper 6
Powder can be reliably poured into the extraction chamber 12. The outlet 17 of the shower dome 5 is provided with a relatively small opening on the motor 8 side from the coffee bean inlet 10 between the hopper and the grinding chamber. Further, a lower annular rib 18 of the shower dome 5 and an annular rib 19 around the steam discharge port are provided so as to be in contact with the inner periphery of the upper opening of the hopper.
Furthermore, the hopper 6 side above the coffee bean inlet 10
An eave-shaped edge 20 is formed to form a protruding projection .

In this configuration, when the coffee beans are crushed, the shower dome 5 flows backward through the coffee beans inflow port 10.
In addition, the coffee powder adhering to the inner surface of the hopper 6 is washed with hot water discharged from the discharge pipe, flows out to the extraction chamber 12, and returns to a state before use when it can be reused. Discharge pipe 1
By integrating 6 with the lid 4 and the shower dome 5,
Even if the lid 4 is accidentally opened while the hot water is being discharged, the hot water is spouted to the shower dome 5 so that the danger of spouting the hot water to the outside is prevented. Inlet 1 for coffee beans with powder flowing backward
An annular rib 19 is provided around the motor 8 on the side opposite to the side 0 so that the powder does not scatter outside through the opening. The lower annular rib 18 of the shower dome 5 prevents the coffee powder from scattering outside so as to be in contact with the inner periphery of the opening at the upper end of the hopper 6. Further, the eave-shaped edge portion 20 provided at the upper end of the inlet 10 for coffee beans is effective in preventing coffee powder from flowing backward from the grinding chamber 7 and scattering when grinding coffee beans.

FIG. 3 shows an embodiment of the second problem solving means.
And FIG. In FIG. 3, an inlet 10 for coffee beans between the hopper 6 and the crushing chamber 7 is opened so as to be shifted from the center of rotation of the motor 8 and the cutter 9 in the direction of rotation, and the upper end of the opening has an eave-like edge. 20 are provided. FIG. 4 shows a cutter. On the outer periphery of a metal disk, two pairs are formed to be longer than the other two pairs, and a long inclined portion 21 inclined toward the motor and another 1 are provided.
The pair includes eight short-sloped portions 22 formed shorter than the two pairs and also tilted to the motor side, and the other pair formed as the inlet-side inclined portions 23 formed to be tilted toward the inlet 10 for coffee beans. Protruding blades are arranged, and arc-shaped concave portions 24 are provided between the blades.

With this configuration, the flow of coffee beans into the crushing chamber 7 is restricted so as to gradually flow into the shape of the inflow port 10 and the disk flat portion of the cutter 9, and the coffee beans are crushed by eight blades. The load applied to the cutter 9 is made uniform so that uneven rotation of the motor 8 does not occur, and the impact is alleviated to reduce the generation of an impact sound, so that a motor having a small power can be used.

[0018]

As is apparent from the above description, the coffee extractor of the present invention discharges coffee powder adhering to the shower dome and the inner surface of the hopper by flowing backward from the coffee bean inlet when the coffee beans are crushed. Usability is improved by washing with hot water discharged from the tube. Especially with the discharge pipe
Since a hopper and a crushing chamber are arranged between the extraction chambers,
Hot water from the discharge port should not be blocked by the hopper or grinding chamber.
Hopper lid, hopper,
Coffee beans can be poured into the extraction chamber without fail.

In addition, the inflow of coffee beans is appropriately restricted, rotation unevenness is reduced, and noise at the time of grinding coffee beans is reduced, thereby increasing the commercial value.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a coffee extractor according to one embodiment of the present invention.

FIG. 2 is an overall perspective view of the same.

FIG. 3 is a perspective view of a main part of one embodiment of the present invention.

FIG. 4 is a perspective view of a cutter according to one embodiment of the present invention.

FIG. 5 is a perspective view of a conventional cutter.

FIG. 6 is a partial cross-sectional view of a conventional coffee extractor.

[Explanation of symbols]

 Reference Signs List 4 lid 5 shower dome 6 hopper 7 crushing chamber 8 motor 9 cutter 10 inflow port 11 filter 12 extraction chamber 13 glass container 16 discharge pipe 20 edge

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hiroshi Nonoguchi 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-63-270013 (JP, A) JP-A-63-63 168130 (JP, A) JP-A-5-42047 (JP, A) Japanese Utility Model Application Sho 61-190940 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 31/42

Claims (5)

(57) [Claims] 1. A main body, a water storage tank, an extraction chamber for extracting coffee, a water rising pipe led out from a bottom of the water storage tank through a check valve, and a heating device for heating water flowing to the water rising pipe. A coffee extractor , comprising: a discharge pipe having a discharge port which communicates with a water rising pipe and discharges to a hopper lid which can be opened and closed, and a crushing chamber having a hopper and a cutter built therein is disposed between the discharge pipe and the extraction chamber. 2. The coffee extractor according to claim 1, wherein an edge portion serving as a projection protruding toward the hopper is provided on the upper surface of the coffee bean inlet between the hopper and the grinding chamber. 3. The discharge pipe and the lid above the hopper opening are connected to each other.
2. The coffee brewer of claim 1, wherein the coffee brewer is deployed on a body . 4. A disk-shaped cutter for grinding coffee beans.
Eight protrusions are formed at the tip of the metal plate of
Make it longer than two pairs, tilt to the motor side, and the other pair forward
Formed shorter than 2 pairs and tilted to the motor side,
Fold the remaining pair to the coffee beans crushing chamber inlet side.
The coffee extractor according to claim 1 formed by bending . 5. Coffee for connecting a hopper and a crushing chamber.
The bean inlet is not on the rotation direction side than the cutter rotation center.
5. The coffee extractor according to claim 4, wherein the coffee extractor is provided.