Coffee grinder

Abstract

The present invention relates to a coffee grinder comprising: a main body; lower blades installed on the main body; a housing which detachably couples to the upper surface of the main body and to which a hopper, into which coffee beans are put, detachably couples; upper blades installed on the housing so as to come into contact with the lower blades; and one-touch coupling parts which allow the housing to be coupled to and detached from the main body in a one-touch manner.

Description

coffee grinder

[0001] The present invention relates to a coffee grinder.

[0002] Whole bean coffee, a beverage preferred by modern people, is classified into drip coffee (filtration method) and espresso (pressurized extraction method) depending on the extraction method from the beans. Here, espresso refers to liquid coffee extracted by supplying hot water to ground coffee beans. Ground coffee beans are coffee beans that have undergone the roasting process of green coffee beans and have been ground using a coffee grinder.

[0003] A conventional coffee grinder comprises a main body, a housing installed on the upper side of the main body, a hopper detachably coupled to the housing and into which coffee beans are fed, an upper blade installed in the housing for grinding beans supplied from the hopper, and a plurality of lower blades installed in the main body for grinding beans supplied from the hopper, and includes a drive motor for rotating the lower blades, wherein the upper blade is fixed and does not rotate, and the lower blade can be coupled to the drive shaft of the drive motor through a coupling.

[0004] However, conventional coffee grinders had a problem in that it was difficult to replace or clean the upper and lower blades due to the complex coupling structure between the drive motor and the main body.

[0005] The present invention has been devised to solve the aforementioned problems, and the objective of the present invention is to provide a coffee grinder that offers the convenience of easily replacing and cleaning the lower blade and upper blade installed on the main body and the housing, respectively, by enabling the housing to be attached and detached from the main body with a single touch.

[0006] Another objective of the present invention is to provide a coffee grinder that can minimize frictional heat generated between the upper blade, the lower blade, and the coffee beans, which determines the unique taste of the coffee beans, by adjusting the rotational speed of the upper blade and the lower blade according to the roasting state of the coffee beans and individual preferences.

[0007] The problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned problems will be clearly understood by a person skilled in the art from the description below.

[0008] A coffee grinder according to one embodiment of the present invention comprises: a lower blade installed on the main body; a housing detachably coupled to the upper surface of the main body and detachably coupled to a hopper into which coffee beans are fed; an upper blade installed on the housing so as to be in contact with the lower blade; and a one-touch fastening part that allows the housing to be fastened or detached from the main body with a single touch.

[0009] Additionally, the one-touch fastening part may include a locking member installed on the lower side of the housing; and a locking hole formed on the upper surface of the main body, wherein the locking member is locked or unlocked according to the rotation of the housing.

[0010] Additionally, the locking member comprises a locking arm; and a locking projection connected to the locking arm, and the locking hole may include a through hole through which the locking arm and the locking projection can pass or exit; and an elongated hole formed from the through hole in the rotational direction of the housing, wherein, depending on the rotation of the housing, the locking arm is inserted and the locking projection is locked in place, or the locking arm is disengaged and the locking projection is released.

[0011] In addition, the above-mentioned elongated hole may have an arc shape.

[0012] In addition, the above-mentioned locking member and the above-mentioned locking hole may be composed of multiple members.

[0013] Additionally, it may further include a rail that extends vertically from the above-mentioned hole and guides the movement of the above-mentioned locking arm.

[0014] In addition, it may further include a locking part that locks or unlocks the housing with respect to the main body.

[0015] Additionally, the locking part may include: a locking cylinder that is coupled through the through hole of the housing and positioned to protrude into the communication hole of the main body; a locking pin that is installed to be movable and rotatable along the locking cylinder and is positioned at a spaced-away position from the communication hole or at a protruding position protruding into the communication hole; and a locking hook coupled to the locking pin and rotated in conjunction with the rotation of the locking pin to be locked or unlocked in the communication hole.

[0016] Additionally, a first slot and a second slot are formed on the upper surface of the locking cylinder, the second slot has a smaller depth than the first slot, and the locking pin includes a locking projection that is locked and fixed in the first slot or the second slot, and when the locking projection is inserted into the first slot, the locking pin is positioned at the protruding position, and when the locking projection is inserted into the second slot, the locking pin can be positioned at the separated position.

[0017] In addition, it may further include an elastic member that generates an elastic force to move the locking pin to the aforementioned separation position.

[0018] Other specific details of the present invention are included in the detailed description and drawings.

[0019] A coffee grinder according to one embodiment of the present invention has the effect of providing convenience by allowing the housing to be attached to and detached from the main body with a single touch, thereby enabling easy replacement and cleaning of the lower blade and upper blade installed in the main body and the housing, respectively.

[0020] Another objective of the present invention is to minimize the frictional heat generated between the upper blade, the lower blade, and the coffee beans, which determines the unique taste of the coffee beans, by adjusting the rotation speed of the lower blade according to the roasting state of the coffee beans and individual preferences.

[0021] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by a person skilled in the art from the description below.

[0022] FIG. 1 is a perspective view showing a coffee grinder according to one embodiment of the present invention.

[0023] FIG. 2 is an exploded perspective view showing a coffee grinder according to one embodiment of the present invention.

[0024] FIGS. 3 to 5 are perspective views showing the process of disassembling the housing from the main body of a coffee grinder according to one embodiment of the present invention.

[0025] FIG. 6 is a perspective view showing a locking part of a coffee grinder according to one embodiment of the present invention.

[0026] FIG. 7 is a perspective view showing a locking part of a coffee grinder according to one embodiment of the present invention.

[0027] FIG. 8 is an exploded perspective view showing a locking part of a coffee grinder according to one embodiment of the present invention.

[0028] FIG. 9 is a perspective view showing the locking state of a locking part of a coffee grinder according to one embodiment of the present invention.

[0029] FIG. 10 is a cross-sectional view showing the locking state of a locking part of a coffee grinder according to one embodiment of the present invention.

[0030] FIG. 11 is a perspective view showing the unlocked state of a locking part of a coffee grinder according to one embodiment of the present invention.

[0031] FIG. 12 is a cross-sectional view showing the unlocked state of a locking part of a coffee grinder according to one embodiment of the present invention.

[0032] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the present invention, and the present invention is defined only by the scope of the claims.

[0033] The terms used in this specification are for describing the embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. The terms "comprises" and / or "comprising" used in this specification do not exclude the presence or addition of one or more other components in addition to the components mentioned. Throughout the specification, the same reference numerals refer to the same components, and "and / or" includes each of the mentioned components and all combinations of one or more. Although terms such as "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical scope of the invention.

[0034] Unless otherwise defined, all terms used herein (including technical and scientific terms) may be used in a meaning commonly understood by those skilled in the art to which the present invention pertains. Furthermore, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0035] Spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used to facilitate the description of the relationship between one component and other components as illustrated in the drawings. Spatially relative terms should be understood as encompassing different orientations of components during use or operation, in addition to the orientations depicted in the drawings. For example, if a component depicted in a drawing is inverted, a component described as "below" or "beneath" of another component may be placed "above" of that component. Therefore, the exemplary term "below" may encompass both the lower and upper directions. Components may also be oriented in other directions, and accordingly, spatially relative terms may be interpreted according to the orientation.

[0036] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0037] FIG. 1 is a perspective view showing a coffee grinder according to one embodiment of the present invention, FIG. 2 is an exploded perspective view showing a coffee grinder according to one embodiment of the present invention, and FIG. 3 to 5 are perspective views showing the process of disassembling the housing (300) from the main body (100) of the coffee grinder according to one embodiment of the present invention.

[0038] As illustrated in FIGS. 1 to 5, a coffee grinder according to one embodiment of the present invention may include a main body (100), a lower blade (210), a housing (300), an upper blade (220), and a one-touch fastening part (400).

[0039] The main body (100) can serve as the basic body of the present invention. A housing (300), a lower blade (210), an discharge part (150), a drive motor, a processor, and a safety sensor (130) may be installed in the main body (100). Here, the housing (300) may be detachably coupled to the upper side of the main body (100). Additionally, the lower blade (210) may be housed on the upper surface of the main body (100). Additionally, the discharge part (150) may be installed at the front of the main body (100). Furthermore, the drive motor and the processor may be installed inside the main body (100).

[0040] The discharge part (150) is installed at the front of the main body (100) and can serve to discharge ground coffee beans from the lower blade (210) and the upper blade (220) to the outside.

[0041] The lower blade (210) can be housed on the upper surface of the main body (100). This lower blade (210) can be positioned to come into contact with the upper blade (220) housed in the housing (300). Additionally, the lower blade (210) and the upper blade (220) can serve to grind coffee beans fed through the hopper (110) and convert them into coffee powder.

[0042] The housing (300) can serve to house the upper blade (220) and support the hopper (110). In other words, the housing (300) is detachably coupled to the upper surface of the main body (100), and the hopper (110) into which coffee beans are fed can be detachably coupled.

[0043] For example, a hollow space in which an upper blade (220) is housed may be formed in the center of the housing (300).

[0044] A hopper (110) can be fed coffee beans and can be detachably coupled to the upper surface of a housing (300). At this time, the coffee beans fed through the hopper (110) can fall through the hopper (110) to the upper blade (220) and the lower blade.

[0045] The upper blade (220) can function together with the lower blade (210) to grind coffee beans fed through the hopper (110) and convert them into coffee powder.

[0046] The drive motor can serve to rotate the lower blade (210). This drive motor can be installed inside the main body (100).

[0047] The processor can control the drive motor so that the rotational speed of the lower blade (210) is adjusted according to the roasting state of the coffee beans and the individual's preference. For example, the processor may have an interface that receives input from the user regarding the roasting state of the coffee beans and the individual's preference.

[0048] The safety sensor (130) can sense whether the hopper (110) is connected to the housing (300) and control whether the drive motor is allowed to operate. For example, if the safety sensor (130) senses that the hopper (110) is connected to the housing (300), it can allow the drive motor to operate. Additionally, if the safety sensor (130) senses that the hopper (110) is disconnected from the housing (300), it can restrict the operation of the drive motor. In this way, the safety sensor (130) can prevent rotation of the lower blade (220) caused by the operation of the drive motor while the lower blade (220) is exposed to the housing (300) by limiting the operation of the drive motor while the hopper (110) is separated from the housing (300). Through this, the safety sensor (130) can prevent a safety accident in which the user's hand is damaged by the rotation of the lower blade (220) while the lower blade (220) is exposed to the housing (300).

[0049] For example, the safety sensor (130) can sense whether the hopper (110) is connected to the housing (300) by sensing the load applied to the main body (100) while the hopper (110) is connected to or disconnected from the housing (300). A load sensor may be used for this safety sensor (130).

[0050] The one-touch connecting part (400) can serve to connect or disconnect the housing (300) from the main body (100) with a one-touch connection depending on the rotation of the housing (300). For example, when the housing (300) rotates forward, the housing (300) can be connected to the main body (100) with a one-touch connection, and when the housing (300) rotates backward, the housing (300) can be disconnected from the main body (100) with a one-touch connection. For another example, when the housing (300) rotates backward, the housing (300) can be connected to the main body (100) with a one-touch connection, and when the housing (300) rotates forward, the housing (300) can be disconnected from the main body (100) with a one-touch connection. Here, forward rotation may be clockwise rotation, and reverse rotation may be counterclockwise rotation.

[0051] The one-touch fastening part (400) may include a locking member (410) and a locking hole (420).

[0052] A locking member (410) may be installed on the lower side of the housing (300). This locking member (410) may be locked or unlocked in a locking groove formed in the main body (100) depending on the rotation of the housing (300), and details regarding this will be described later. As an example, the locking member (410) may have a bolt shape overall.

[0053] The locking member (410) may include a locking arm (411) and a locking projection (412).

[0054] The catch arm (411) can be installed on the lower side of the housing (300). For example, the catch arm (411) may have a tubular shape.

[0055] The catch (412) can be connected to the catch arm (411). This catch (412) may have a larger diameter than the catch arm (411). For example, the catch (412) may be connected to the lower side of the catch arm (411).

[0056] A locking hole (420) is formed on the upper surface of the main body (100), so that the locking member (410) can be locked or unlocked depending on the rotation of the housing (300). The locking hole (420) may include a through hole (421) and an elongated hole (422).

[0057] The through hole (421) has a larger diameter than the stopper (412) and may allow the stopper (412) to pass through or exit. Here, when the stopper (412) passes through the through hole (421), the stopper arm (411) may penetrate the through hole (421).

[0058] The elongated hole (422) can be formed in the rotational direction of the housing (300) from the through hole (421), and depending on the rotation of the housing (300), the locking arm (411) can be inserted and the locking projection (412) can be locked and fixed, or the locking arm (411) can be disengaged and the locking projection (412) can be unlocked. For example, when the housing (300) rotates forward, the locking arm (411) can be inserted into the elongated hole (422) and the locking projection (412) can be locked and fixed, and when the housing (300) rotates backward, the locking arm (411) can be disengaged from the elongated hole (422) and the locking projection (412) can be unlocked. For example, when the housing (300) is rotated in reverse, a locking arm (411) can be inserted into the elongated hole (422) and a locking projection (412) can be locked and fixed, and when the housing (300) is rotated in the forward direction, the locking arm (411) can be disengaged from the elongated hole (422) and the locking projection (412) can be unlocked.

[0059] For example, the long hole (422) can have an arc shape.

[0060] For example, the catch member (410) and the catch hole (420) may be configured in multiple numbers. These multiple catch members (410) and catch holes (420) may be formed at intervals along the rotational direction of the housing (300).

[0061] The one-touch fastening part (400) may further include a rail (430).

[0062] The rail (430) extends vertically from the elongated hole (422) and can serve to guide the movement of the catch arm (411). Additionally, the rail (430) can also serve to support the catch tab (412) that is secured in the elongated hole (422).

[0063] For example, the rail (430) can be extended vertically along the circumference of the elongated hole (422) toward the lower side of the main body (100).

[0064] Hereinafter, the process of a one-touch connection part (400) of a coffee grinder according to one embodiment of the present invention separating the housing (300) from the main body (100) by one touch as the housing (300) rotates will be described. The following process may be performed by a robotic arm or a user.

[0065] First, the housing (300) is rotated in reverse. As a result, the locking member (410) is released from the locking hole (420). Specifically, the locking arm (411) of the locking member (410) is disengaged from the elongated hole (422) of the locking hole (420) and moved to the through hole (421) of the locking hole (420), and as the locking projection (412) of the locking member (410) is released from the locking hole (422) of the locking hole (420), the locking member (410) can be released from the locking hole (420). (See FIGS. 3 and 4)

[0066] Next, the housing (300) is raised. As a result, the locking member (410) is disengaged from the locking hole (420). Specifically, the locking arm (411) and the locking projection (412) of the locking member (410) are disengaged from the through hole (421). (See FIG. 5)

[0067] Hereinafter, the process of a one-touch connecting part (400) of a coffee grinder according to one embodiment of the present invention connecting the housing (300) to the main body (100) by one touch according to the rotation of the housing (300) will be described. The following process may be performed by a robotic arm or a user.

[0068] First, the housing (300) is lowered, and the locking member (410) is inserted into the locking hole (420). Specifically, the locking arm (411) and the locking projection (412) of the locking member (410) are inserted by passing through the through hole (421).

[0069] Next, the housing (300) is rotated forward. As a result, the locking member (410) is locked and fixed in the locking hole (420). Specifically, the locking arm (411) of the locking member (410) is disengaged from the elongated hole (422) of the locking hole (420) and moved to the through hole (421) of the locking hole (420), and as the locking projection (412) of the locking member (410) is locked and fixed against the elongated hole (422) of the locking hole (420), the locking member (410) can be locked and fixed from the locking hole (420).

[0070] FIG. 6 is a perspective view showing a locking part (500) of a coffee grinder according to one embodiment of the present invention, FIG. 7 is a perspective view showing a locking part (500) of a coffee grinder according to one embodiment of the present invention, FIG. 8 is an exploded perspective view showing a locking part (500) of a coffee grinder according to one embodiment of the present invention, FIG. 9 is a perspective view showing a locking state of a locking part (500) of a coffee grinder according to one embodiment of the present invention, FIG. 10 is a cross-sectional view showing a locking state of a locking part (500) of a coffee grinder according to one embodiment of the present invention, FIG. 11 is a perspective view showing an unlocked state of a locking part (500) of a coffee grinder according to one embodiment of the present invention, FIG. 12 is a cross-sectional view showing an unlocked state of a locking part (500) of a coffee grinder according to one embodiment of the present invention.

[0071] As illustrated in FIGS. 6 to 12, a coffee grinder according to one embodiment of the present invention may further include a locking part (500) for locking or unlocking a housing (300) with respect to a main body (100). Accordingly, when the main body (100) and the housing (300) are locked by the locking part (500), the connection between the main body (100) and the housing (300) is allowed, but the separation of the main body (100) and the housing (300) may be restricted. Additionally, when the main body (100) and the housing (300) are unlocked by the locking part (500), both the connection and separation of the main body (100) and the housing (300) may be allowed.

[0072] The locking part (500) may include a locking cylinder (510), a locking pin (520), a locking hook (530), and an elastic member (600).

[0073] The locking cylinder (510) can be coupled through the through hole (310) of the housing (300) and positioned to protrude into the communication hole (120) of the main body (100). Here, the upper part of the locking cylinder (510) can be coupled through the through hole (310) of the housing (300), and the lower part of the locking cylinder (510) can be positioned to protrude into the communication hole (120) of the main body (100).

[0074] For example, the through hole (310) may be formed through the housing (300). Additionally, the communication hole (120) may be formed through the upper surface of the main body (100) and may be opened toward the center of the main body (100). Furthermore, the communication hole (120) may be positioned to come into contact with the through hole (310) while the main body (100) is fastened to the housing (300).

[0075] The locking pin (520) is installed to be movable along the locking cylinder (510) and rotatable in place, and may be positioned at a spaced-away position spaced apart from the communication hole (120) or at a protruding position protruding into the communication hole (120). Specifically, when the locking pin (520) is moved to the upper side of the locking cylinder (510), the locking pin may be positioned at a spaced-away position. Additionally, when the locking pin (520) is moved to the lower side of the locking cylinder (510), the locking pin may be positioned at a protruding position.

[0076] The locking hook (530) is coupled to the locking pin (520) and rotates in conjunction with the rotation of the locking pin (520), so that it can be locked or unlocked in the communication hole (120). Specifically, when the locking hook (530) is positioned in the opening area of ​​the communication hole (120), the locking hook (530) can be unlocked in the communication hole (120). Additionally, when the locking hook (530) is fixed in a hooked state on the inner circumference of the communication hole (120), the locking hook (530) can be locked in the communication hole (120).

[0077] For example, a first slot (511) and a second slot (512) are formed on the upper surface of a locking cylinder (510), and the second slot (512) has a smaller depth than the first slot (511). A locking pin (520) may include a locking projection (521) that is locked and fixed in the first slot (511) or the second slot (512). Meanwhile, the locking pin (520) may be positioned in a protruding position when the locking projection (521) is inserted into the first slot (511), and the locking pin (520) may be positioned in a spaced position when the locking projection (521) is inserted into the second slot (512).

[0078] The elastic member (600) can generate an elastic force that moves the locking pin (520) to a separated position.

[0079] For example, an elastic member (600) may be interposed between the inner surface of the locking cylinder (510) and the outer surface of the locking pin (520). Here, the upper end of the elastic member (600) may be coupled to the upper end of the locking cylinder (510), and the lower end of the elastic member (600) may be coupled to the lower end of the locking pin (520).

[0080] Hereinafter, the locking process of the locking part (500) of a coffee grinder according to one embodiment of the present invention will be described. The following process may be performed by a robotic arm or a user.

[0081] First, the locking pin (520) is moved to the lower side of the locking cylinder (510) and rotated in place, and the locking projection (521) is inserted into the first slot (511).

[0082] Subsequently, the locking pin (520) is positioned in a protruding position and protrudes into the communication hole (120) of the main body (100), and the locking hook (530) is fixed by being caught on the inner circumference of the communication hole (120) of the main body (100). Accordingly, as the locking hook (530) installed on the housing (300) is fixed by being caught on the communication hole (120) formed in the main body (100), the housing (300) and the main body (100) can be locked. At this time, the connection between the main body (100) and the housing (300) is permitted, but the separation of the housing (300) of the main body (100) may be restricted. (See FIG. 9 and FIG. 10)

[0083] Hereinafter, the process of unlocking the locking part (500) of a coffee grinder according to one embodiment of the present invention will be described. The following process may be performed by a robotic arm or a user.

[0084] First, the locking pin (520) is moved to the upper side of the locking cylinder (510) and rotated in place, and the locking projection (521) is inserted into the second slot (512).

[0085] Subsequently, the locking pin (520) is positioned at a spaced-away position and is spaced apart from the communication hole (120) of the main body (100), and the locking hook (530) may be positioned in the opening area of ​​the communication hole (120) of the main body (100). Accordingly, as the locking hook (530) installed on the housing (300) is positioned in the opening area of ​​the communication hole (120) formed in the main body (100), the housing (300) and the main body (100) can be unlocked. At this time, the connection and separation of the main body (100) and the housing (300) may be permitted. (See FIGS. 11 and 12)

[0086] According to the present invention, a coffee grinder according to one embodiment of the present invention has the effect of allowing the housing to be attached to and detached from the main body with a single touch, thereby enabling easy replacement and cleaning of the lower blade and the upper blade installed in the main body and the housing, respectively.

[0087] In addition, a coffee grinder according to one embodiment of the present invention has the effect of minimizing frictional heat generated between the upper blade, the lower blade, and the coffee beans, which determines the unique taste of the coffee beans, by adjusting the rotational speed of the lower blade according to the roasting state of the coffee beans and personal preference.

[0088] Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention may be implemented in other specific forms without altering its technical concept or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive.

Claims

1. Main body; A lower blade installed on the above main body; A housing detachably coupled to the upper surface of the main body and detachably coupled to a hopper into which coffee beans are fed; An upper blade installed in the housing so as to come into contact with the lower blade; and A coffee grinder comprising a one-touch fastening part that allows the housing to be fastened or detached from the main body with one touch.

2. In Paragraph 1, The above one-touch fastening part is, A locking member installed on the lower side of the above housing; and A coffee grinder comprising a locking hole formed on the upper surface of the main body, wherein the locking member is locked or unlocked according to the rotation of the housing.

3. In Paragraph 2, The above-mentioned locking member is catch; and It includes a locking projection connected to the above locking arm, and The above-mentioned catch hole is, A through hole capable of passing through or exiting the above-mentioned locking arm and the above-mentioned locking projection; and A coffee grinder comprising an elongated hole formed in the rotational direction of the housing from the through hole, wherein, depending on the rotation of the housing, the locking arm is inserted and the locking tab is locked in place, or the locking arm is disengaged and the locking tab is released.

4. In Paragraph 3, The above-mentioned long hole is a coffee grinder having an arc shape.

5. In Paragraph 2, A coffee grinder in which the above-mentioned locking member and the above-mentioned locking hole are composed of a plurality.

6. In Paragraph 3, A coffee grinder further comprising a rail that extends vertically from the above-mentioned hole and guides the movement of the above-mentioned locking arm.

7. In Paragraph 1, A coffee grinder further comprising a locking part for locking or unlocking the housing with respect to the main body.

8. In Paragraph 7, The above locking part is, A locking cylinder that is coupled through the through hole of the housing and positioned to protrude into the communication hole of the main body; A locking pin installed to be movable and rotatable in place along the locking cylinder, and positioned at a spaced position spaced apart from the communication hole or at a protruding position protruding into the communication hole; and A coffee grinder comprising a locking hook coupled to the locking pin, which rotates in conjunction with the rotation of the locking pin, and which locks or unlocks in the communication hole.

9. In Paragraph 8, A first slot and a second slot are formed on the upper surface of the above locking cylinder, and The second slot above has a smaller depth than the first slot, and The above locking pin includes a locking projection that is locked and fixed in the first slot or the second slot, and When the locking projection is inserted into the first slot, the locking pin is positioned at the protruding position, and A coffee grinder in which the locking pin is positioned at the spaced position when the locking projection is inserted into the second slot.

10. In Paragraph 8, A coffee grinder further comprising an elastic member that generates an elastic force to move the locking pin to the aforementioned separated position.

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