Hand-operated coffee bean grinder

Abstract

The utility model discloses a hand-operated coffee bean grinder which comprises an outer shell, an upper end cover, a powder receiving cup, a hand-operated handle, a grinding mechanism and a particle thickness adjusting mechanism. The powder receiving cup is connected to the bottom of the outer shell in a threaded mode and used for containing ground coffee powder. The upper end cover covers the upper end part of the outer shell in a split manner; the crank handle is fixed on the upper end cover and can drive the upper end cover to rotate; the grinding mechanism is connected with the upper end cover to be linked with the upper end cover; the particle thickness adjusting mechanism is matched with the grinding mechanism to adjust the grinding thickness of the coffee beans; according to the connecting structure of the grinding mechanism and the upper end cover, a connecting piece is arranged on the grinding mechanism, a plurality of inserting blocks are distributed on the peripheral face of the connecting piece, and the upper portion of each inserting block is of an inclined structure. Inserting grooves with the same number as the inserting blocks are distributed in the inner circumferential face of the upper end cover, the inlet portion of each inserting groove is of an outwards-expanded inclined face structure, and the inserting blocks are inserted into the inserting grooves. The utility model has the advantage that the installation convenience can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of coffee bean grinders, in particular to a hand-cranked coffee bean grinder. Background Art

[0002] At present, coffee bean grinders mainly grind coffee beans into bean powder through the cutter assembly inside the grinder so that people can brew coffee. Hand-crank coffee bean grinders are popular among most consumers because of their easy installation, disassembly and cleaning. The main principle is that the end cover is driven to rotate by the hand crank, and then the end cover drives the grinding mechanism connected to it to grind. The connection method between the end cover and the connecting piece on the grinding mechanism of the existing hand-crank coffee bean grinder is mostly through an inner hexagonal structure, that is, an inner hexagon is provided on the connecting part of the end cover, and an outer hexagon is provided on the outside of the connecting piece, and the inner hexagon and the outer hexagon are connected to each other. This structure needs to find a suitable angle during installation so that the inner hexagonal ribs and the outer hexagonal ribs are completely aligned before they can be inserted and connected, which is inconvenient during use. Therefore, it is necessary to improve it. Summary of the Invention

[0003] The purpose of the present invention is to provide a hand-cranked coffee bean grinder to address the deficiencies in the prior art, which has the feature of being easier to install.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a hand-cranked coffee bean grinder, comprising an outer shell, an upper end cover, a powder receiving cup, a hand crank, a grinding mechanism and a particle coarseness adjustment mechanism; the powder receiving cup is screwed to the bottom of the outer shell for storing ground coffee powder; the upper end cover can be detachably covered on the upper end portion of the outer shell; the hand crank handle is fixed on the upper end cover and can drive it to rotate; the grinding mechanism is connected to the upper end cover so as to be linked thereto; the particle coarseness adjustment mechanism is used in conjunction with the grinding mechanism to adjust the grinding coarseness of the coffee beans; the connection structure of the grinding mechanism and the upper end cover is: the grinding mechanism has a connecting piece, the outer circumference of the connecting piece is distributed with a plurality of plug-in blocks, the upper part of the plug-in block is an inclined structure; the inner circumference of the upper end cover is distributed with plug-in slots with the same number as the plug-in blocks, the entrance of the plug-in slot is an outward-expanding inclined structure, and the plug-in block is plugged into the plug-in slot.

[0005] The grinding mechanism includes a connecting part, a connecting rod, a cutter disc and a cutter head. The connecting part is connected to the upper end cover and operates in conjunction with it; the connecting rod is inserted into the connecting part and operates in conjunction with it; the cutter head is arranged at the lower part of the connecting rod and its outer peripheral surface cooperates with the inner peripheral surface of the cutter disc to form a grinding space.

[0006] The particle coarseness adjustment mechanism includes an adjusting knob, an adjusting spring and a spring top plate. The upper end of the connecting rod has a threaded portion, and the adjusting knob is screwed on the threaded portion; the spring top plate abuts against the inside of the outer shell, one end of the adjusting spring abuts against the spring top plate, and the other end abuts against the connecting rod; the bottom of the connecting rod is fixedly connected to a linkage block, and the linkage block is connected to the bottom of the cutter head and linked thereto.

[0007] A color ring assembly is sleeved on the upper part of the connecting rod, and the color ring assembly is used to check the particle size of the coffee powder.

[0008] After adopting the above structure, the advantages of the present invention over the prior art are: the present invention provides a plug-in block with an inclined structure on the circumference of the connecting piece, and provides a plug-in slot with an inclined surface structure inside the upper end cover. In this way, the inclined surfaces can be quickly aligned during installation, and the plug-in block can be quickly inserted into the plug-in slot, making installation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of the present utility model.

[0010] Figure 2 It is a partial structural diagram of the utility model.

[0011] Figure 3 It is a schematic diagram of the internal structure of the upper end cover (with the cover plate opened) of the utility model.

[0012] Figure 4 It is a structural diagram of embodiment 2 of the present utility model. DETAILED DESCRIPTION

[0013] The following description is only a preferred embodiment of the present invention and does not limit the protection scope of the present invention. The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Example 1, see Figures 1 to 3The figure shows a hand-cranked coffee bean grinder, comprising an outer shell 10, an upper cover 11, a coffee cup 12, a crank handle 13, a grinding mechanism, and a particle size adjustment mechanism. The outer shell 10 is a through-hole structure, with the coffee cup 12 screwed to the bottom of the outer shell 10 to receive ground coffee. The upper cover 11 can be detachably attached to the upper end of the outer shell 10. During use, the coffee mouth can be placed into the outer shell 10 by opening the upper cover 11. The crank handle 13 is fixed to the upper cover 11 and drives its rotation. A ring 111 is provided on the upper end cover 11, and the connecting piece 14 on the grinding mechanism is plugged into the ring 111 to allow the grinding mechanism to work together with the upper end cover 11; specifically, the grinding mechanism includes a connecting piece 14, a connecting rod 17, a cutter disc 18 and a cutter head 19, and a number of plug-in blocks 15 are distributed on the outer peripheral surface of the connecting piece 14, and the upper part of the plug-in block 15 is an inclined structure; the inner peripheral surface of the upper end cover 11 is distributed with plug-in slots 16 with the same number as the plug-in blocks 15, and the entrance part of the plug-in slot 16 is an outward-expanding inclined surface structure, and the plug-in block 15 is plugged into the plug-in slot 16; this structure only needs to rotate the upper end cover 11 at will during installation so that the inclined surface on the plug-in slot 16 contacts the inclined surface on the plug-in block 15, and can be freely plugged in, which is more convenient to use. A sleeve is provided within the outer shell 10, into which a connecting rod 17 is inserted. The upper portion of the connecting rod 17 is inserted into the connecting member 14 and rotates therewith. Specifically, the outer circumference of the connecting rod 17 has a square portion, and the connecting member 14 has a square through-hole. The square portion is inserted into the square through-hole, allowing the connecting member 14 to drive the connecting rod 17 to rotate. A cutter head 19 is provided at the lower portion of the connecting rod 17, and its outer circumference cooperates with the inner circumference of the cutter disc 18 to form a grinding space. The gap between the cutter head 19 and the cutter disc 18 is the coarseness of the particles. When the gap is large, the particle size is large, and when the gap is small, the particle size is small.

[0015] The particle coarseness adjustment mechanism is used in conjunction with the grinding mechanism to adjust the grinding coarseness of the coffee beans. It includes an adjustment knob 20, an adjustment spring 21 and a spring top plate 22. The upper end of the connecting rod 17 has a threaded portion, and the adjustment knob 20 is screwed on the threaded portion; the spring top plate 22 abuts against the inside of the outer shell 10, one end of the adjustment spring 21 abuts against the spring top plate 22, and the other end abuts against the step inside the connecting rod 17; the bottom of the connecting rod 17 is fixedly connected to a linkage block 23, which is connected to the bottom of the cutter head 19 and linked thereto. During use, the adjusting spring 21 is always in a compressed state. By rotating the adjusting knob 20 counterclockwise, it rises a certain distance on the threaded portion of the connecting rod 17. Under the external tension of the adjusting spring 21, this part of the distance will be transmitted downward, that is, the linkage block 23 drives the cutter head 19 to move downward, so that the gap between the cutter head 19 and the cutter disc 18 is increased, so as to achieve the effect of increasing the particle size; conversely, when the adjusting knob 20 is rotated clockwise, the threaded portion of the connecting rod 17 is contracted into the adjusting knob 20, that is, the linkage block 23 drives the cutter head 19 to move upward, so that the gap between the cutter head 19 and the cutter disc 18 is reduced, so as to achieve the effect of reducing the particle size.

[0016] Example 2, see Figure 4 The structure of Example 2 is roughly the same as that of Example 1, except that a color ring assembly is provided on the connecting rod 17 near its threaded portion, and the color ring assembly includes an upper pressing block, a lower pressing block, and a plurality of color rings 30 of different colors. The color ring 30 is located between the upper pressing block 31 and the lower pressing block 32. Each color ring 30 is stacked from top to bottom, and each color ring 30 represents a different particle size. Specifically, at the same position, seeing the bottom color ring 30 represents a smaller particle size, and seeing the top color ring 30 represents a larger particle size. In order to facilitate viewing of the color ring 30, a transparent cover is provided between the adjusting knob 20 and the connecting member 14. The height of the transparent cover is the same as or close to the height of the color ring 30, so as to check which color color ring 30 is located at its position, so as to obtain the grinding particle size. Taking the four colors (four gears) of the color ring 30 as an example, and from bottom to top they are blue, green, yellow and red respectively, during use, the blue color ring 30 represents the smallest particle size, and the red color ring 30 represents the largest particle size; when the adjustment knob 20 is rotated counterclockwise, the connecting rod 17 will move downward, and the color ring 30 will also move downward. When the green color ring 30 is seen on the transparent cover 31, it means that the grinding particle size is the second gear, and when the red color ring 30 is seen, it means that the grinding particle size is the fourth gear; and so on, to improve the convenience of use.

[0017] The cutter head 19 and the cutter disc 18 are currently widely used, and other structures and principles are the same as those in the prior art and will not be described in detail here.

Claims

1. A hand-cranked coffee bean grinder, comprising an outer shell (10), an upper end cover (11), a powder receiving cup (12), a hand crank (13), a grinding mechanism and a particle coarseness adjustment mechanism; the powder receiving cup (12) is screwed to the bottom of the outer shell (10) for storing ground coffee powder; the upper end cover (11) can be detachably covered on the upper end of the outer shell (10); the hand crank 13 is fixed to the upper end cover (11) and can drive the upper end cover to rotate; the grinding mechanism is connected to the upper end cover (11) to be linked thereto; the particle coarseness adjustment mechanism is used in conjunction with the grinding mechanism to adjust the grinding coarseness of the coffee beans; and the characteristics are: The connection structure between the grinding mechanism and the upper end cover (11) is as follows: the grinding mechanism is provided with a connecting piece (14), the outer peripheral surface of the connecting piece (14) is distributed with a plurality of plug-in blocks (15), and the upper portion of the plug-in blocks (15) is an inclined structure; the inner peripheral surface of the upper end cover (11) is distributed with plug-in slots (16) having the same number as the plug-in blocks (15), the entrance portion of the plug-in slot (16) is an outward-expanding inclined structure, and the plug-in blocks (15) are plugged into the plug-in slots (16).

2. The hand-cranked coffee bean grinder according to claim 1, characterized in that: The grinding mechanism comprises a connecting member (14), a connecting rod (17), a cutter disc (18) and a cutter head (19); the connecting member (14) is connected to the upper end cover (11) and is in motion therewith; the connecting rod (17) is inserted into the connecting member (14) and is in motion therewith; the cutter head (19) is arranged at the lower part of the connecting rod (17) and its outer peripheral surface cooperates with the inner peripheral surface of the cutter disc (18) to form a grinding space.

3. The hand-cranked coffee bean grinder according to claim 2, characterized in that: The particle coarseness adjustment mechanism comprises an adjustment knob (20), an adjustment spring (21) and a spring top plate (22); the upper end of the connecting rod (17) has a threaded portion, and the adjustment knob (20) is screwed onto the threaded portion; the spring top plate (22) abuts against the interior of the outer shell (10); one end of the adjustment spring (21) abuts against the spring top plate (22), and the other end abuts against the connecting rod (17); the bottom of the connecting rod (17) is fixedly connected to a linkage block (23), and the linkage block (23) is connected to the bottom of the cutter head (19) and is linked thereto.

4. The hand-cranked coffee bean grinder according to claim 2 or 3, characterized in that: The upper part of the connecting rod (17) is sleeved with a color ring assembly, and the color ring assembly is used to check the particle size of the coffee powder.

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