JPH0420378Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] This invention relates to a coffee mill that finely grinds coffee beans.

[Conventional technology]

Conventionally, when grinding coffee beans at home, a device with a relatively simple structure, small size, and light weight has been used. For example, an electric motor is housed inside a cylindrical coffee mill body with an open top, and a coffee bean storage container is attached to the top of the electric motor with its rotor shaft passing through it. is fixed to the rotor shaft of the electric motor,
The coffee beans are ground by placing a required amount of coffee beans in a storage container, placing a cover on the top of the coffee mill body, and rotating the electric motor. The weight, size, and shape of the coffee mill having the above structure are selected so that it can be easily operated by anyone regardless of age or gender in a general household, and a compact coffee mill is usually used. Therefore, the structure of the coffee mill is such that the electric motor, switch, coffee bean storage container, and other parts that are housed inside the main body of the coffee mill must be installed in a narrow space. Attaching each part using screws takes time and effort to assemble, which hinders the productivity of the coffee mill.
It had the disadvantage of increasing manufacturing costs.

Also, since the coffee mill is compact, there is usually no space to store the power cord, so after using the coffee mill, the power cord must be wrapped directly around the body of the coffee mill, or the cord must be wrapped around the body of the coffee mill. I tied them up and stored them on the kitchen table or shelf. However, in this case, the power cord is exposed to the outside and becomes a hindrance to storing other kitchen appliances, or the power cord gets caught on another appliance and when it is removed from a shelf, etc. If the cord is pulled incorrectly, the coffee grinder may fall onto the floor and be damaged or cause a malfunction.In addition, since the cord is wrapped or bundled around the main body, additional space is required to install the coffee grinder. As a result, the cords were awkward and it was difficult to organize them in harmony with other kitchen appliances, so they had to be stored in a disharmonious state.

[Purpose of invention]

This invention eliminates the above-mentioned drawbacks, simplifies the configuration and simplifies assembly work, and makes effective use of the internal space to create a convenient coffee mill that can quickly and securely store the power cord. Our goal is to provide the following.

[Summary of the idea]

This invention removably joins an upper case housing a coffee bean storage container and a motor mounting frame body housing an electric motor by means of a joining means consisting of a hook-shaped projection and an engagement hole. The electric motor is fixedly supported without using fixing means such as screws, and a lower case that covers the motor mounting frame is attached to the outside of the electric motor mounting frame so as to be rotatable independently of the upper case. The present invention is characterized in that a power cord accommodating portion is formed between the bottom portion and the motor mounting frame.

[Example of idea]

Embodiments of this invention will be described below with reference to FIGS. 1 to 9.

In Figures 1 to 3, reference numeral 1 denotes an upper case formed of synthetic resin into a short cylindrical shape.The upper side of this case 1 is formed with a slightly smaller diameter than the lower side, and a fitting part 1a is provided. Tapered fitting protrusions 1b are provided vertically on the outer periphery of the fitting part 1a, maintaining an interval of 180°, for example, and a wide groove 1c is provided in the lower body of the fitting protrusion 1b. is vertically recessed and an operation hole 1d is bored in its lower part, an engaging stepped part 1e is provided around the inner circumference near the center, and an engaging hole is formed in the lower open end of the upper case 1. A pair of joint pieces 1 with 1f open
g are vertically arranged facing each other. Reference numeral 2 denotes a motor mounting frame (hereinafter simply referred to as the mounting frame), and as shown in FIG. The other (lower side in FIG. 2) has a plate-shaped bottom part 2b, and the annular part 2a and bottom part 2b are connected with a synthetic resin with a bridging part 2c interposed therebetween. This mounting frame 2 is integrally molded by
As shown in FIG. 2, in the center of the outer surface of the bottom part 2b, there is a winding drum 2e having a recess 2d inside, and a bearing sleeve 2f having a smaller diameter than this winding drum 2e, which is integrated with the bottom facing downward. As shown in FIG. 7, this bearing sleeve 2f is divided into four parts by providing grooves at four places along its axis, and the two opposing divided pieces have engaging claw pieces 2f. ₁ protrudes outward. Further, as shown in FIG. 3, a support base 2g is provided in a part of the vicinity of the bottom portion 2b, and a clamping piece 2h having a cut groove and a locking piece 2i are erected upward. . Furthermore, an engaging groove 2j is provided on the inner periphery of the annular portion 2a at a position corresponding to the clamping piece 2h, as shown in FIGS. 2 and 3, and a bridging portion 2c is provided as shown in FIG. , a concave portion 2k into which the joint piece 1g is fitted.
are arranged vertically, and a hook-shaped projection 2n that is hooked into an engagement hole 1f opened in the joint piece 1g is provided in a protruding manner at the upper part of the grooved portion 2k. Reference numeral 3 denotes an electric motor housed and held in the mounting frame 2. Brackets 3b and 3c supporting a rotor shaft 3a are disposed above and below, so that the rotor shaft 3a projects upward from the upper bracket 3b, and the lower bracket 3c is supported by a concave portion 2d at the center of the bottom portion 2b via a vibration isolating member 3d made of rubber or the like. Reference numeral 4 denotes a coffee bean storage container made of a thin metal plate pressed into an arm shape, and has a large diameter insertion hole 4a in the center of the bottom through which the rotor shaft 3a passes. The saucer-shaped bottom of a resin collar 4b that is penetrated by the container 4 is fitted, and a thrust washer 4c and a packing 4d are interposed between the collar 4b and the upper bracket 3b, and in this state, the upper open end of the storage container 4 is The connecting piece 1g of the upper case 1 is fitted into the groove 2k of the mounting frame 2 by contacting the engaging stepped portion 1e inside the upper case 1, and the hook-shaped protrusion 2 is inserted into the engaging hole 1f of the connecting piece 1g.
When the coffee bean storage container 4 is locked as shown in FIG. 5, the coffee bean storage container 4 is pressed and locked against the engagement step 1e inside the upper case by the biasing force of the packing 4d, as shown in FIG. By locking the container 4, the electric motor 3 is firmly clamped and held between the storage container 4 and the bottom portion 2b by the elastic force of the packing 4d and the vibration isolating member 3d, and is attached to the mounting frame 2. Reference numeral 5 denotes a cutter fixed to the rotor shaft 3a within the storage container 4. Reference numeral 6 denotes a printed circuit board on which a time setting element for setting the time for grinding coffee beans to the desired coarseness and a switch 7 for starting the electric motor 3 are attached to the mounting frame 2.
The clamping piece 2n of the support base 2g provided around the bottom 2b of the
The lower part is supported by the locking piece 2i, and the upper part is supported by the annular part 2.
By engaging with the engagement groove 2j inside a, the printed circuit board 6 is fitted into the mounting frame 2 as shown in FIG.
It is installed so that it will not come off. Further, the switch 7 attached to the printed circuit board 6 has a movable contact 7 provided on the switch 7, as shown in FIG.
A movable piece 7c is fixedly attached to the upper ends of the fixed contact 7b and the upper end of the fixed contact 7b to face the operation hole 1d of the upper case 1. The movable piece 7c is horizontally movably attached to the upper part of the printed circuit board 6. If you press to the right,
The movable contact 7a is supported near its center by the upper edge of the catch 7e, and is bent in the opposite direction to the pressing direction of the movable piece 7c to contact the fixed contact 7b and close the power circuit of the motor 3. However, when the pressure is released, it returns to its original position and opens the power supply circuit. At this time, the three light emitting diodes 6a fixed to the top of the printed circuit board 6 are turned on according to the driving time of the electric motor 3 by time setting. Reference numeral 8 denotes a lower case that rotatably houses the mounting frame 2, and as shown in FIGS. 2 and 5, the lower surface of the winding drum 2e of the mounting frame 2 is mounted on the bottom surface 8a, and the bearing tube 2f is mounted on the bottom surface 8a. A penetrating shaft hole 8b is drilled, and when the shaft hole 8b is penetrated through the bearing sleeve 2f, since the bearing sleeve 2f is divided into four parts, one engaging claw piece _2f1 is inserted into the shaft hole 8b. Since it is inserted in a pressed state and the engaging claw piece 2f ₁ is locked to the outer edge of the shaft hole 8b, the mounting frame 2 can be rotated by the bearing sleeve 2f without coming out into the lower case 8. can be stored in. By storing the mounting frame 2 in the lower case 8, the winding drum 2
A space formed between the bottom part 2b of the mounting frame 2 and the top of the bottom surface 8a of the lower case 8 on the outside of e.
This serves as a housing section 10 for the power cord 9. This housing part 1
As shown in FIG. 7, an arch-shaped locking lever 11 for preventing reverse winding of the power cord 9 is rotatably supported on the bottom 2b of the mounting frame 2 in the vicinity of the winding drum 2e. ing. As shown in FIG. 3, this locking lever 11 has a pivot pin 11 at its base end that pivots on the bottom portion 2b.
As shown in FIG. 7, a locking protrusion 11b that slides into contact with the arc-shaped guide groove 12 recessed in the bottom part 2b and is locked on the tip edge thereof, and a thin-walled locking protrusion 11b on the tip end, as shown in FIG. A locking piece 11c having a shape is integrally formed. Reference numeral 13 denotes a hat-shaped transparent cover that covers the opening of the upper case 1, and a groove 13a is vertically provided on the inner periphery to fit the tapered fitting protrusion 1b provided in the fitting part 1a of the upper case 1. Also, on the outer periphery of this cover 13, a vertically long strip-shaped switch lever 14 is installed, when the cover 13 is positioned and attached to the upper case 1 by the fitting protrusion 1b. The switch lever 14 is made of highly elastic synthetic resin and is attached to the cover 13 at a position that coincides with the concave groove 1c.
The switch 7 is inserted into the operation hole 1d and presses the movable piece 7c of the switch 7 at a position corresponding to the operation hole 1d of the upper case 1 on the free end side. Protrusion 14 to insert
A is provided protrudingly. Reference numeral 15 denotes a light emitting diode 6a provided close to the groove 1c on the outer periphery of the upper case 1.
This is the display window. 17 is a housing part 1 for the power cord 9
As shown in FIG. 8 and FIG. When the locking piece 11 is rotated by a certain angle in the counterclockwise direction as shown in FIG.
A locking step portion 17a is formed in a protruding manner to receive the locking lever 11 and prevent rotation of the locking lever 11.

As shown in FIGS. 3 and 7, the power cord 9 is introduced into the case 8 through the outlet 17 of the lower case 8, enters the recess 2d through the opening of the winding drum 2e, and is prevented from coming out by a locking member. It is connected to the electric motor 3 in such a way that it is locked so that it does not move.

Next, the operation will be explained.

When grinding coffee beans, the plug 16 attached to the power cord 9 is connected to a power source (not shown). Subsequently, the cover 13 is removed, a required amount of coffee beans are put into the storage container 4, and the cover 13 is placed over the upper case 1 by fitting the fitting protrusion 1b of the upper case 1 into the groove 13a. When the cover 13 is put on, the protrusion 14a of the switch lever 14 and the movable piece 7a of the switch 7 are aligned, thereby pressing the lower part of the switch lever 14 toward the operation hole 1d, and the protrusion 14a moves the switch 7. Movable piece 7c
Press. When the movable piece 7c is pressed, the movable contact 7a is reversed from its original position to the left side as shown by the two-dot chain line in FIG.
contact with the motor 3 to start the electric motor 3. When the electric motor 3 is activated, the cutter 5 rotates at high speed and grinds coffee beans. The grinding time can be classified by sequentially lighting up the three light emitting diodes 6a according to the time of coarse grinding, medium grinding, and fine grinding based on the signal from the time setting element. After grinding the coffee beans to the desired coarseness, the switch lever 14 is released from the pressure and the electric motor 3 is stopped.

As shown in FIG. 2, the electric coffee bean grinding motor 3 itself has a thrust washer 4c, a gasket 4d, and a collar 4b fitted onto the rotor shaft 3a in this order on an upper bracket 3b, and the coffee beans are stored in the upper part of the rotor shaft 3a. The container 4 is placed on it, and the vibration isolating member 3d is fitted to the lower side of the lower bracket 3c. In this state, the electric motor 3 is housed in the mounting frame 2, and the vibration isolating member 3d fitted to the lower bracket 3c is placed on the bottom part 2b. Recessed portion 2d
The storage container 4 placed on the upper bracket 3b has the engagement step 1 of the upper case 1 at its opening edge.
When the upper case 1 is pressed downward in this state, the storage container 4 is pressed downward by the engagement step 1e of the upper case 1, and the engagement hole provided in the joint piece 1g of the upper case 1 is pressed downward. When the hook-shaped protrusion 2n of the mounting frame 2 is locked to the upper case 1f, the storage container 4 is allowed to expand in its radial direction.
The insertion hole 4a of the storage container 4 is received by the engagement stepped portion 1e and held without moving laterally.
The centers of the recess 2d of the bottom 2b of the mounting frame 2 can be aligned on the same line, and as a result,
The electric motor 3 can be elastically held by the packing 4d and the vibration isolating member 3d, and can be effectively pressed and supported by the mounting frame 2 without using fixing members such as screws. Therefore, during grinding of coffee beans, the rotor shaft 3a
The coffee beans can be ground smoothly without any vibration.

Next, when storing the coffee grinder, use the power cord 9.
When rolling up and storing in the storage part 10, hold the lower case 8 with one hand, turn the upper case 1 with the other hand in the direction of the arrow in Fig. 8, and remove the mounting frame connected thereto. 2 in the same direction.
At this time, as shown in FIG. 2, in the mounting frame 2, the annular portion 2a fits into the open end of the lower case 8, the bearing tube 2f penetrates into the shaft hole 8b, and the engaging claw 2f ₁ connects to the shaft. hole 8b
Since it is locked to the outer edge of the lower case 8, it rotates smoothly without coming off from the lower case 8. For this reason,
As shown in FIGS. 6 and 8, the power cord 9 is wound around the outer periphery of the winding drum 2e of the mounting frame 2 in a spiral manner via the locking lever 11, and as shown in FIG.
The bottom 2b of the mounting frame 2 and the bottom 8a of the lower case 8
It is housed in the housing section 10 between.

Note that when winding up the power cord 9, if you try to turn the upper case 1 in the opposite direction, that is,
When an attempt is made to turn the lever clockwise, as shown in FIGS. 7 and 9, the locking lever 11 is rotated counterclockwise about the pivot pin 11a by the power cord 9, and the locking protrusion at the tip of the locking lever 11 rotates counterclockwise around the pivot pin 11a. As shown in FIG. 7, the locking piece 11c is in contact with one side edge 12a of the longitudinal opening edge of the guide groove 12 opened at the periphery of the bottom 2b of the mounting frame 2, and the locking piece 11c is As shown in the figure, in order to engage with the locking step 17b formed bulging inside the cord outlet 17 of the lower case 8, even if the upper case 1 tries to turn the mounting frame 2 in the direction of the arrow in FIG. It does not rotate and the power cord 9 is not wound in the opposite direction.

[Effects of the invention] In the coffee mill of this invention, the upper case to which the coffee bean storage container is attached and the motor mounting frame housing the electric motor that drives the cutter protruding into the storage container are placed on the upper case side. It is removably joined using the provided joining piece, and
A motor mounting frame and a lower case that covers the motor mounting frame from the outside are constructed by inserting a bearing tube provided at the bottom of the mounting frame into a shaft hole drilled in the bottom of the lower case. It is designed so that it can be stored freely and assembled into a coffee mill without having to remove it from the case.
There is no need to individually attach each part using fixing members such as screws when assembling a coffee mill.In other words, each part can be assembled by fitting it into place, so it is easy to assemble and requires no skill. It can be done quickly and without any need. Furthermore, the simplification of the assembly work and the elimination of the use of fixing members such as screws significantly reduce the manufacturing cost of the coffee mill, making it possible to provide a coffee mill with excellent mass productivity.

In addition, in this invention, the coffee mill is made by fitting each component into a method,
Because it can be assembled in almost one step, for example, if the coffee bean storage container, cutter, upper and lower cases are soiled and need to be washed with water, or if electrical parts need to be replaced in the event of a breakdown, etc. Since the coffee mill can be easily disassembled, the mounting frame that houses the electric motor can be removed and washed with water, and the motor mounting frame can be removed from the lower case when replacing electrical parts. With this structure, replacement work can be easily performed without requiring any special effort.

Furthermore, by providing the winding drum at the bottom of the motor mounting frame, this invention inevitably creates a space between the bottom of the mounting frame and the bottom of the lower case when the mounting frame is housed in the lower case. Since this space can be effectively used as a power cord accommodating section, there is no need to provide a special power cord accommodating section, which is very convenient.

Moreover, as described above, this invention provides a winding drum at the bottom of the motor mounting frame, and the lower side of this winding drum is divided into a plurality of pieces by grooves, and the winding cylinder is divided into a plurality of parts by grooves, and the winding cylinder is engaged with the outer periphery of the tip of the divided piece. A bearing sleeve is formed with claw pieces, and a shaft hole through which the bearing sleeve is inserted is bored in the center of the bottom of the lower case, so that when the mounting frame is stored in the lower case, the bearing sleeve passes through the shaft hole. Since the motor mounting frame is engaged and supported by the engaging claw pieces so that it does not come off from the shaft hole,
It becomes possible to rotatably accommodate the shaft hole in the lower case without using a special support member. As a result, the motor mounting frame is rotatably stored and held in the lower case, and the power cord storage area is formed using a space on the outer periphery of the drum. At the time of winding, by rotating the motor mounting frame, the motor can be quickly and easily wound around the outer periphery of the winding drum and stored in the lower case. Also, when pulling out the power cord, by holding the plug of the power cord in your hand and pulling it out, the motor mounting frame automatically rotates within the lower case due to the force of pulling out the power cord, making it easy to pull out. , winding the power cord,
Drawer work can be done quickly and easily.

Furthermore, since there is no need to provide a special cord winding device for winding up the power cord, there is an advantage that the coffee mill can be manufactured compactly and economically.

As explained above, this idea allows each part to be assembled quickly and reliably without using screws by fitting each part together, and also makes use of the space between the parts and the mounting frame formed on the bottom of the lower case. The power cord is configured so that it can be used to store the power cord, making assembly and handling convenient.Moreover, the power cord can be stored inside the lower case, making it easy to manufacture and store without interfering with other equipment. A coffee grinder that is easy to handle can be provided.

[Brief explanation of the drawing]

Fig. 1 is a front view of the coffee mill of this invention, Fig. 2 is a longitudinal sectional front view, Fig. 3 is an exploded perspective view of the coffee mill, Fig. 4 is a bottom view, and Fig. 5 is a vertical sectional view of the waist. Fig. 6 is a perspective view showing the state in which the power cord is wound around the bottom of the motor mounting frame; Fig. 7 is a perspective view showing the locking state of the locking lever when attempting to reversely wind the power cord; Fig. 8 9 is an explanatory diagram for explaining the winding state of the power cord, and FIG. 9 is an explanatory diagram for explaining the locking state of the locking lever. 1... Upper case, 2... Mounting frame, 2e...
Winding barrel, 2f...Bearing cylinder, 3...Electric motor, 4...Storage frame, 8...Lower case, 8b...Shaft hole, 9...
...Power cord, 10...Accommodating section (power cord).

Claims (1)

[Claims for Utility Model Registration] An upper case 1 containing a coffee bean container 4, a motor mounting frame 2 containing a motor 3,
It consists of a lower case 8 that covers the motor mounting frame 2 from the outside. A hook-shaped protrusion 2n protruding at a position that matches the joint piece 1g is hooked into an engagement hole 1f of a joint piece 1g integrally hung from the case 1, and is fixedly supported in a detachable manner, and the electric motor At the center of the outer surface of the bottom 2 of the mounting frame 2, a winding drum 2e is provided to protrude downward, and a bearing sleeve 2f smaller in diameter than the winding drum 2e is formed below the winding drum 2e. The lower case 8 is divided into a plurality of pieces by a cut groove provided along the groove, and an engaging claw piece _2f1 is provided at the tip of the divided piece to protrude outward, and a motor mounting frame is provided at the center of the bottom surface 8a of the lower case 8. A shaft hole 8b through which the bearing sleeve 2f of the body 2 passes is bored, the motor mounting frame 2 is inserted into the lower case 8, the bearing sleeve 2f is inserted into the shaft hole 8b, and the engaging claw piece 2 is inserted into the shaft hole 8b.
_f1 is irremovably hooked to the edge of the shaft hole 8b and rotatably stored, and furthermore, in the space between the bottom 2b of the motor mounting frame 2 and the bottom surface 8a of the lower case 4, A coffee mill characterized in that a housing portion 10 for a power cord 9 is formed on the outer periphery of a winding drum 2e.