JPS5855873Y2 - coffee maker - Google Patents

Description

[Detailed description of the invention] The present invention relates to a coffee maker that has both the functions of a mill and a drip. To provide a coffee maker capable of preventing leakage of coffee liquid from a contact part between a blade and a boss part of a case.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

In Fig. 1, reference numeral 1 denotes a coffee maker which integrally has both the functions of a mill and a drip, and a bottomed cylindrical storage chamber 2 with an open top surface is integrally partitioned into the upper part of the main body 1a. ing.

The bottom of the storage chamber 2 is provided with an opening 2a for pouring coffee liquid into the bottle 3.

A motor chamber 4 is integrally formed in the lower part of the storage chamber 2 in the main body 1a, and inside the motor chamber 4, a vertical shaft motor (not shown) projects an upper rotating shaft 5 through the storage chamber 2 in a liquid-tight manner. Let it be.

A case 6 formed in the shape of a cylinder with a bottom is detachably attached to the storage chamber 2.

In this case 6, a filter is stretched over a bottom portion 6a having a plurality of perforations 7, and a cylindrical boss portion 8 is formed to protrude inward from the center of the bottom portion 6a.

A cutter blade 9 is freely rotatably fitted into the boss portion 8 of the case 6.

That is, the cutter blade 9 is attached to the boss portion 8 of the case 6.
The boss part 10 is loosely fitted into the boss part 10, and the cutter 11 is installed radially at the upper end of the boss part 10.
It is held in the bottom 6a of the case 6 by the upper annular flange 10a at 0 and an annular stopper 12 attached to the lower part so as not to fall out.

Further, the cutter blade 9 has a hole 10 b in the boss portion 10 into which the rotating shaft 5 of the vertical axis motor is loosely fitted.
An engaging portion 10a that engages with a retaining protrusion 5a provided on the outer periphery of the rotating shaft 5 of the vertical axis motor is formed on b, and is configured to transmit the rotational force of the vertical axis motor.

The cutter blade 9 configured in this way is made of synthetic resin or the like, and its own weight is larger than the buoyancy caused by the hot water poured into the case 6 during dripping.

On the other hand, a bowl-shaped filter cap 13 is detachably attached to the opening 6b of the case 6, and hot water supplied from a hot water supply pipe (not shown) is uniformly injected through the small hole 13a at the top.

In addition, 16 in the figure is an upper lid that covers the upper end opening of the main body 1a.

Next, the operation of the present invention constructed as described above will be explained.

When grinding coffee beans, attach the case 6 to the storage chamber 2 of the main body 1a with the filter cap 13 removed,
After inserting coffee beans through the opening 6b and attaching the filter cap 13, the vertical axis motor is driven to rotate the cutter blade 9, and the coffee beans are milled into powder by the cutter 11 of the cutter blade 9. .

During such milling, the upper end of the boss portion 8 protruding inward of the case 6 is sealed by the flange portion 10a of the cutter blade 9, and the coffee powder is scattered outward inside the case 6. Therefore, coffee powder does not enter the gap S between the boss portion 8 of the case 6 and the boss portion 10 of the cutter blade 9.

On the other hand, when dripping coffee liquid, hot water supplied from a hot water supply pipe is injected from the small hole 13a of the filter cap 13 onto the coffee grounds in the case 6, and the coffee liquid is extracted from the bottom perforation 7 of the case 6. and is poured into the bolt 3 from the bottom opening 2a of the storage chamber 2.

Even during such dripping, the weight of the cutter blade 9 is greater than the buoyancy of the hot water injected into the case 6, so the upper end of the boss 8 of the case 6 is pushed against the flange 10 of the boss 10 of the cutter blade 9. sealed with a,
Coffee liquid does not leak from the gap S.

In the above embodiment, the contact surface between the upper end of the boss portion 8 of the case 6 and the flange portion 10a of the boss portion 10 of the cutter blade 9 is brought into surface contact with the cutter blade 9 due to its own weight. As shown, an annular protrusion 14 may be integrally formed on the flange 10a of the cutter blade 9 on the contact surface for point contact, thereby reducing the gap S.
Not only can leakage of coffee powder and coffee liquid from the cutter blade 9 be prevented, but also the frictional resistance during rotation of the cutter blade 9 can be reduced.

Further, the annular projection 14 is connected to the flange 1 of the cutter blade 9.
It is not limited to 0a, and may be formed at the upper end of the boss portion 8 of the case 6.

Further, between the contact surface between the upper end of the boss portion 8 of the case 6 and the flange portion 10a of the boss portion 10 of the cutter blade 9, a third
As shown in the figure, a disc-shaped spacer 15 having annular protrusions 14' on both sides may be inserted, which can reduce frictional resistance than the annular protrusions 14, provide good sealing properties, and prevent the gap S from being removed. It is possible to reliably prevent leakage of coffee powder and coffee liquid.

As explained above, the present invention has a boss part at the center of the bottom of the case of a coffee maker that has both the functions of a mill and a drip integrally, and a cutter blade is loosely fitted into this boss part, and the cutter blade's own weight The structure is such that the buoyancy is greater than the buoyancy caused by the hot water injected during dripping into the case, resulting in the following effects.

(i) Not only during milling but also during dripping, the cutter blade is completely unaffected by the buoyancy of hot water injected into the case, and the cutter blade is completely sealed from the boss of the case due to its own weight. , coffee powder,
Leakage of coffee liquid can be reliably prevented.

(ii) The structure is simple and can be manufactured at low cost, and the case can be attached very easily and reliably.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of essential parts of a coffee maker showing a preferred embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a modification of the present invention.
FIG. 3 is a perspective view of a spacer used in another modification of the present invention. In the figure, 1 is a coffee maker, 6 is a case, 9 is a cutter blade, 14 is an annular projection, and 15 is a spacer.

Claims (3)

[Scope of utility model registration request] (1) A coffee maker that integrally has both mill and drip functions, has a case with a boss in the center of the bottom, and a cutter blade loosely fitted into the boss of the case, and drips into the case. This coffee maker is characterized by the weight of the cutter blade being greater than the buoyancy caused by the hot water that is poured into the coffee maker. (2) The cutter blade has a boss portion that comes into contact with the boss portion of the case, and at least one of the boss portions on the contact surface has an annular projection.Claim 1 of Utility Model Registration
The coffee maker listed in section. (3) The coffee maker according to claim 1, which is a registered utility model, wherein a spacer having an annular projection is inserted between the boss portion of the cutter blade and the boss portion of the case.