Milk foaming device for coffee machine

Abstract

The present invention relates to a milk frothing device for a coffee machine and its air conditioning mechanism, aiming to address the technical issues of the inconvenience of assembly and disassembly of milk frothing devices in existing similar products, as well as the unreasonable design of the locking assembly and air conditioning mechanism within the frothing device. The key points are that a support portion of the locking assembly of the milk frothing device is fixedly connected to the main body of the frothing device, a button and a corresponding return spring are provided on the top of the frothing device main body above the pressing portion of the locking assembly, and the pressing portion drives the pressing portion and the support portion to move vertically when the button is pressed downward; the pressing portion is provided with a vertically directional pushing block structure, and a corresponding movable locking tongue is provided with a pushing portion; when the pressing portion moves downward, it pushes the movable locking tongue forward, pushing out the main body of the frothing device, and locking the main body of the frothing device with the milk box; when the pressing portion moves upward, the pushing block structure disengages from the pushing portion, and the movable locking tongue is returned to its original position by the locking tongue spring, retracting the main body of the frothing device, and separating the main body of the frothing device from the milk box.

Description

Technical Field

[0001] The invention relates to a milk foaming device, in particular to a milk foaming device for a coffee machine. Background Art

[0002] Existing coffee machines and some beverage machines require milk frothing devices to enhance the taste of beverages. A coffee machine is an electrical device used for making coffee, and is generally divided into semi-automatic and fully automatic types. A semi-automatic coffee machine is a traditional Italian coffee machine that manually operates the steps of grinding, pressing, loading, brewing, and manually removing residues. A fully automatic coffee machine is a coffee machine that automatically controls the entire coffee brewing process, including preheating, cleaning, grinding, pressing, brewing, and removing the powder. Coffee is brewed according to scientific data and procedures, and can be obtained with just a light touch. Some of the above-mentioned coffee machines are equipped with a milk frothing device to enhance the taste of coffee. The milk frothing device of some coffee machines generally includes a frother and a milk box. The frother is located above the milk box, so that the frother and the milk box are installed together. They must be reliably connected and cannot be disassembled. At the same time, when they need to be disassembled for cleaning, the operation must be quick and convenient. As disclosed in the Chinese patent document, application number 201821558169.9, authorization announcement date 2019.07.23, utility model name "milk frother and coffee machine"; the milk frother includes a main body and an air inlet assembly provided on the main body, a frothing cavity running through its opposite ends is provided in the main body, the air inlet assembly includes a first part, the first part has an air cavity, the first part is provided with an air outlet connecting the air cavity with the frothing cavity, the air inlet assembly also includes a second part connected to the first part, the second part has an air channel; the first part is also provided with a first air inlet connected to the air channel; the milk frother also includes an adjusting sealing sleeve arranged in the air channel and capable of rotating therein, the adjusting sealing sleeve is provided with at least one air groove, so that the air groove and the first air inlet can be opposite or staggered during the rotation of the adjusting sealing sleeve. These foamers are generally equipped with an elastic buckle and a pressing portion on the elastic buckle. When the foamer is installed and closed on the milk box, the buckle on the foamer snaps together with the milk box under the action of elasticity. When the foamer and the milk box need to be disassembled, the pressing portion on the elastic buckle is pressed to disengage the elastic buckle of the foamer from the milk box, and the foamer is removed from the milk box at the same time. Some foamer buckles use a spring lever method, but the engagement and disengagement methods are exactly the same as those of the elastic buckle. The above operation method is simple and reliable, but it requires two hands to operate. One hand needs to press and hold the foamer while the other hand needs to hold the milk box, which is not very convenient. Summary of the Invention

[0003] To overcome the aforementioned shortcomings, the present invention aims to provide a milk frothing device for coffee machines in the art. This device addresses the technical issues of existing similar milk frothing devices, such as the inconvenient assembly and disassembly of these devices, as well as the unreasonable design of the locking assembly and air conditioning mechanism within the frothing device, which results in a large space occupation. This objective is achieved through the following technical solution.

[0004] A milk frothing device for a coffee machine, comprising a frothing machine and a milk box, wherein the frothing machine comprises a steam inlet, a milk inlet and a straw, an air inlet and an adjustment portion, and the frothing machine is provided with a lock assembly for disengaging and fastening the frothing machine and the milk box; the key points of its structural design are that the lock assembly comprises a pressing portion, a supporting portion, a limiting connecting rod, a movable locking tongue, a locking tongue spring, and a connecting rod spring, wherein the supporting portion is fixedly connected to the main body of the frothing machine, and the pressing portion of the lock assembly is above the top of the main body of the frothing machine. A button and a corresponding return spring are provided. The pressing part drives the pressing part and the supporting part to move in the vertical direction by pressing the button downward; the pressing part is provided with a pushing block structure in the vertical direction, and the corresponding movable lock tongue is provided with a pushing part; when the pressing part moves downward, the movable lock tongue is pushed forward to push out the main body of the foamer, and the main body of the foamer is buckled with the milk box; when the pressing part moves upward, the pushing block structure is separated from the pushing part, and the movable lock tongue is returned to its original position by the lock tongue spring, and the main body of the foamer is retracted, and the main body of the foamer is separated from the milk box.

[0005] The locking lever is hinged on the top of the locking lever, on the top of which is a locking lever on the left side of the lock member, and the locking lever on the bottom side is locked. The track groove of the above-mentioned support part cooperates with the slide column on the limit connecting rod, and the slide column moves in the track groove; the support part is also provided with a push block slide rail that cooperates with the movable lock tongue, and the movable lock tongue is provided with a corresponding lock tongue groove, and the movable lock tongue moves horizontally; the lock tongue spring is installed between the movable lock tongue and the support part and arranged along the direction of movement.

[0006] The connecting rod spring is omitted on one side of the pressing part of the lock assembly. The connecting rod spring can also be omitted because the track slot design of the supporting part satisfies the limiting and linkage of the limiting connecting rod.

[0007] The rail slide groove of the supporting part is provided with an upper limit part, a lower limit part, an upper reversing part, a lower reversing part, a downward guide surface, and an upward guide surface. The upper limit part is located at the top of the entire rail slide groove, and the rail slide groove matches the sliding column of the limit link and is concave; the upper reversing part is arranged on the top of the central eccentric column in the rail slide groove, and the upper reversing part deviates from the center of the upper limit part in the vertical direction; a downward guide surface 60215 is provided on the outer side surface of the rail slide groove on one side of the upper reversing part of the central eccentric column and on the lower side of the upper limit part, and the guide rail slide groove between the downward guide surface and the upper reversing part is smoothly connected; the lower limit part is arranged in the middle below the upper reversing part A check portion is provided at the intersection of the groove of the center eccentric column and the other side of the groove of the lower limit portion of the center eccentric column and the downward guide surface. The check portion is positioned lower than the lower limit portion and forms a closed loop through the downward guide surface and the check portion of the track chute; an upwardly protruding lower reversing portion is provided at the bottom of the outer side surface of the track chute and below the lower limit portion of the center eccentric column. The lower reversing portion matches the sliding column of the limit link and is concave; an upward guide surface is provided on the outer side surface of the track chute and the symmetrical center eccentric column on the other side of the upper reversing portion facing away from the downward guide surface. The upward guide surface is smoothly connected to the upper limit portion and the lower reversing portion to form a closed loop. The above-mentioned pressing portion pulls the limit link upward through the connecting rod spring. When the sliding column of the limit link moves to the highest position of the track chute, it is pulled by the upper limit portion to limit its continued upward movement. At the same time, the limit link pulls the pressing block through the guide column set at the other end.

[0008] The track slot of the support part and the center eccentric column in the track slot are in a concave heart shape corresponding to the center eccentric column. The top protrusion of the center eccentric column is eccentrically arranged toward the side of the downward guide surface. The sliding column of the limiting connecting rod is located in a closed loop between the track slot of the support part and the center eccentric column.

[0009] Two or more evenly spaced guide structures, in the form of guide posts and guide sleeves, are installed between the button and the main body of the foamer. These structures ensure smooth vertical movement of the button and the pressing portion, preventing jamming or even freezing. Furthermore, two or more evenly spaced return springs are installed between the button and the main body of the foamer to ensure effective rebound of the pressing portion. The button is also equipped with two or more evenly spaced limit buckles, which limit the maximum position of the button and the button portion, protecting the aforementioned locking assembly.

[0010] The main body of the foamer includes a foaming cover and a foaming base. The button is set on the top of the foaming cover. The barbs arranged symmetrically in pairs on the bottom of the button are respectively inserted into the barb holes fixed to the foaming cover. The return springs arranged symmetrically in pairs between the button and the foaming cover are respectively inserted into the spring columns at the bottom of the button. The button is a square protrusion set on the top of the square foaming cover. The above is a specific embodiment of the button structure.

[0011] A carrying handle is provided on one side of the milk box, and the carrying handle is arranged on an outer cover shell on the outside of the box body of the milk box. The outer cover shell includes a base shell, a handle shell and a decorative shell. The base shell of the outer cover shell is buckled with the bottom of the box body, and the handle shell wraps and buckles with the outer diameter of the carrying handle of the box body. A decorative shell is provided on the outer plane of the handle shell.

[0012] A protrusion is correspondingly provided on the main body of the foamer above the handle of the milk box, an air conditioning component in the main body of the foamer is located on this side, and a knob of the air conditioning component extends out of the main body of the foamer.

[0013] The locking assembly is arranged between the air conditioning assembly and the steam drainage assembly on both sides of the main body of the foamer, and a milk outlet pipe is extended out on one side of the supporting part below the pressing part of the locking assembly, or a U-shaped opening is provided at the connection between the foaming cavity and the milk outlet pipe at the milk outlet pipe.

[0014] The foamer of the milk foaming device also includes an air regulating component and a steam drainage component, the air regulating component includes a knob, a valve core cover, an adjusting rod, a valve core, an air regulating piece, an adjusting sealing ring, and a regulator body, the regulator body is fixedly connected to the main body of the foamer, the knob of the regulator body extends out of one end of the main body of the foamer, the regulator body of the air regulating component is connected to the milk foam cavity of the steam drainage component through a connecting pipe, buckles are provided on both sides of the orifice at one end of the knob, three guide ribs are provided inside the orifice of the knob, convex points are provided on both sides of the outer diameter of the corresponding adjusting rod, three guide grooves are provided on the outer diameter of the orifice at one end of the adjusting rod, a valve core mounting groove is provided at the bottom of the other end of the adjusting rod, a first annular sealing rib is provided at the bottom of the valve core, and a first annular sealing rib is provided on one side of the first annular sealing rib There is an air intake notch, and an air intake guide groove is provided on the side of the adjusting rod corresponding to the air intake notch. The air regulating piece is provided with three air intake holes of different sizes and are equidistantly distributed in an arc shape. A second annular sealing rib is provided on the top of the adjusting sealing ring, and an adjusting sealing ring groove is provided on the top of the regulator body; the air regulating piece is fitted and fixed between the first annular sealing rib of the valve core and the second annular sealing rib of the adjusting sealing ring, one end of the valve core is inserted into the valve core mounting groove fixed on the adjusting rod, and the valve core cover is connected to the regulator body through the adjusting rod, while the adjusting rod is clamped and fixed between the valve core cover and the regulator body, the adjusting sealing ring, the air regulating piece, and the valve core are arranged between the adjusting rod and the regulator body, the buckle of the knob is buckled with the convex point of the adjusting rod, and the guide groove of the adjusting rod is inserted into the guide rib of the knob.

[0015] The diameter of one end of the regulating rod of the valve core is smaller than that of one end of the first annular sealing rib, and the outer diameter of the raised cylindrical part is equidistantly provided with air intake grooves, and the air intake grooves correspond to the convex ribs provided in the valve core mounting groove of the regulating rod, and the outer diameters of the air regulating piece and the regulating sealing ring are respectively provided with corresponding large and small protrusions, and the air regulating piece and the regulating sealing ring are inserted into the corresponding large and small grooves in the regulating sealing ring groove of the regulator body through the large and small protrusions on the outer diameters.

[0016] The air inlet grooves of the valve core are cross-shaped and symmetrically arranged in pairs.

[0017] The steam drainage assembly includes a steam inlet, a nozzle, a milk foam cavity, a foaming cavity, and a milk outlet pipe. The orifice at the steam inlet of the regulator body extends out of the other end of the foamer body. Small sealing rings are respectively provided at both ends of the nozzle. The nozzle is fixedly arranged in the channel at the connection between the steam inlet and one end of the milk foam cavity. The milk foam cavity serves as a tee. The other end of the milk foam cavity is connected to one end of the L-shaped foaming cavity, and the other end of the foaming cavity is connected to the milk outlet pipe. Large sealing rings are respectively provided at the connection between the foaming cavity, the milk foam cavity, and the milk outlet pipe. The third pipe opening of the milk foam cavity is connected to the straw.

[0018] A limiting head is protruded on one side of the outer diameter between the two ends of the nozzle, and a limiting notch is provided on one side of the orifice of the milk foam cavity corresponding to the limiting head, and the limiting head of the nozzle is inserted into the limiting notch of the milk foam cavity.

[0019] A milk pipe cover is provided at the connection between the milk outlet pipe of the steam drainage assembly and the foaming cavity. The milk pipe cover is fixed to the convex buckle of the outer diameter of the end of the foaming cavity through the buckle hole at the bottom. The milk pipe cover is aligned with the cover hole on one side of the foamer body.

[0020] The steam inlet of the steam guide assembly is fixed in the main body of the foamer through a hoop.

[0021] The invention has a reasonable structural design, the foamer and the milk box are easy to disassemble and clean, and the foamer has a good foaming effect. It is suitable for use as a coffee machine milk foaming device and an air conditioning mechanism of the foamer, and is a structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a partial exploded structural diagram of an embodiment of the present invention.

[0023] Figure 2 yes Figure 1 Schematic diagram of the bottom structure of the foamer in the explosion state.

[0024] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure.

[0025] Figure 4 yes Figure 3Schematic diagram of the cross-sectional structure, in which part A is framed.

[0026] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of part A.

[0027] Figure 6 yes Figure 3 Schematic diagram of the cross-sectional structure of the milk outlet pipe, in which the framed part is enlarged.

[0028] Figure 7 yes Figure 1 Schematic diagram of the exploded structure of the lock assembly.

[0029] Figure 8 yes Figure 7 Schematic diagram of the structure of the internal track groove after the lock assembly is assembled, and the framed part in the figure is enlarged.

[0030] Figure 9 yes Figure 8 Schematic diagram of the three-dimensional structure of the lock assembly after assembly.

[0031] Figure 10 yes Figure 1 Schematic diagram of the milk carton explosion structure.

[0032] Figure 11 yes Figure 1 Schematic diagram of the exploded structure of the air conditioning component, where the framed part is the bottom structure of the air conditioning component in the exploded state.

[0033] Figure 12 yes Figure 1 Schematic diagram of the steam diversion component explosion structure, with the suction straw omitted in the figure.

[0034] Figure 13 yes Figure 11 Air conditioning components and Figure 12 Schematic diagram of the three-dimensional structure of the steam guidance component after assembly.

[0035] Figure serial number and name: 1, foamer, 2, milk box, 201, handle, 3, button, 301, spring column, 302, hook, 4, foaming cover, 401, cover hole, 402, hook hole, 5, return spring, 6, lock assembly, 601, pressing part, 6011, push block slide rail, 6012, guide hole, 602, support part, 6021, track slide groove, 60211, upper limit part, 60212, lower limit part, 60213, upper reversing part, 60214, lower reversing part, 60215, downward guide surface, 60216, upward guide surface, 60217, check part, 6022, push block slide rail, 6023, center eccentric column, 603, limit connecting rod, 6031, slide column, 6032, guide column, 604, movable lock tongue, 6041, lock tongue slide groove, 6042, spring Spring groove, 605, lock tongue spring, 606, connecting rod spring, 7, connecting pipe, 8, air adjustment assembly, 801, knob, 8011, buckle, 802, valve core cover, 803, adjusting rod, 8031, bump, 8032, guide groove, 8033, air intake guide groove, 8034, valve core mounting groove, 804, valve core, 8041, first annular sealing rib, 8042, air intake notch, 8043 , air inlet groove, 805, air regulating plate, 806, adjusting sealing ring, 8061, second annular sealing rib, 807, regulator body, 8071, adjusting sealing ring groove, 9, steam drainage assembly, 901, steam inlet, 902, nozzle, 903, milk foam cavity, 904, foaming cavity, 905, milk outlet tube, 906, milk tube cover, 10, buckle, 11, straw, 12, foaming seat. Implementation Method

[0036] Now, the structure and use of the present invention will be further described in conjunction with the accompanying drawings. Figures 1-10 As shown, the milk foaming device includes a foamer 1 and a milk box 2, the foamer includes a steam inlet, a milk inlet and a straw 11, an air inlet and an adjustment part, the foamer is provided with a lock assembly 6 for disengaging and fastening between the foamer and the milk box; the lock assembly includes a pressing part 601, a supporting part 602, a limiting connecting rod 603, a movable locking tongue 604, a locking tongue spring 605, and a connecting rod spring 606, the supporting part is fixedly connected to the main body of the foamer, and the main body of the foamer above the pressing part of the lock assembly is connected to the main body of the foamer. The part is provided with a button 3 and a corresponding reset spring 5. The pressing part drives the pressing part and the supporting part to move in the up and down directions by pressing the button; the pressing part is provided with a pushing block structure in the up and down directions, and the corresponding movable lock tongue is provided with a pushing part; when the pressing part moves downward, the movable lock tongue is pushed forward to push out the main body of the foamer, and the main body of the foamer is buckled with the milk box; when the pressing part moves upward, the pushing block structure is disengaged from the pushing part, and the movable lock tongue is returned to its original position by the lock tongue spring, and the main body of the foamer is retracted, and the main body of the foamer and the milk box fall off.

[0037] A track groove 6021 is provided on the outer diameter side of the support part of the above-mentioned lock assembly, a push block slide rail 6022 is provided on the inner diameter of the corner opening at the bottom end of the support part, a raised slide column 6031 is provided on the inner side of one end of the limit link, the slide column of the limit link is inserted into the track groove on one side of the support part, the lock tongue grooves 6041 on both sides of the movable lock tongue are inserted into the push block slide rail in the support part and move horizontally, a spring groove 6042 is provided on one side of the top of the movable lock tongue, one end of the lock tongue spring at the spring groove of the movable lock tongue is against the inner wall of the support part, and the lock tongue spring The other end of the limit link is inserted into the limiting column in the supporting part, and the other side of the spring groove of the movable lock tongue is symmetrically against the raised push block slide rail 6011 on one side of the pressing part inserted into the supporting part; a raised guide column 6032 is provided on the outside of the other end of the limit link, and a limit link is provided on one side of the supporting part. The bottom opening of the pressing part is inserted from the top of the supporting part. At the same time, the guide column of the limiting link on one side of the supporting part in the pressing part is inserted into the guide hole 6012 on one side of the pressing part, and one end of the connecting rod spring on the outside of the pressing part is connected to the tension spring column on the outside of the other end of the limit link exposed from the pressing plate.

[0038] The specific structure of the above-mentioned lock assembly is as follows: the track slide groove of the holding part is provided with an upper limit part 60211, a lower limit part 60212, an upper reversing part 60213, a lower reversing part 60214, a downward guide surface 60215, and an upward guide surface 60216. The upper limit part is located at the top of the entire track slide groove, and the track slide groove matches the sliding column of the limit connecting rod and is concave; the upper reversing part is arranged on the top of the central eccentric column 6023 in the track slide groove, and the upper reversing part deviates from the center of the upper limit part in the vertical direction; a downward guide surface 60215 is provided on the outer side surface of the track slide groove on one side of the upper reversing part of the central eccentric column and on the side below the upper limit part, and the guide rail slide between the downward guide surface and the upper reversing part The groove is smoothly connected; the lower limit portion is located in the groove of the central eccentric column below the upper reversing portion. A check portion 60217 is provided at the intersection of the other side of the groove of the lower limit portion of the central eccentric column and the downward guide surface. The check portion is positioned lower than the lower limit portion, forming a closed loop through the downward guide surface of the track chute and the check portion; an upwardly protruding lower reversing portion is provided at the bottom of the outer side of the track chute and below the lower limit portion of the central eccentric column. The lower reversing portion is concavely matched with the sliding post of the limit link; an upward guiding surface is provided on the outer side of the track chute and the central eccentric column on the other side of the upper reversing portion, facing away from the downward guide surface. The upward guiding surface is smoothly connected to the upper limit portion and the lower reversing portion, forming a closed loop. The track chute of the support portion is concavely shaped like a heart, corresponding to the central eccentric column within the track chute. The top protrusion of the central eccentric column is eccentrically arranged toward the downward guide surface. The sliding post of the limit link is located in the closed loop between the track chute of the support portion and the central eccentric column.

[0039] Two or more evenly spaced guide structures are provided between the button and the main body of the foamer. Two or more evenly spaced return springs 5 ​​are also provided between the button and the main body of the foamer. The button is also equipped with two or more evenly spaced limit buckles. The specific structure of the button is as follows: the main body of the foamer includes a foaming cover 4 and a foaming seat 12. The button is mounted on the top of the foaming cover and inserted through two symmetrically arranged barbs 302 on the bottom of the button into barb holes 402 fixed to the foaming cover. The symmetrically arranged return springs 5 ​​between the button and the foaming cover are each inserted into the spring column 301 at the bottom of the button. The button is a square protrusion mounted on the top of the square foaming cover.

[0040] The specific structure of the milk box is as follows: a handle 201 is provided on one side of the milk box. The handle is provided on the outer shell of the milk box body. The outer shell includes a base shell, a handle shell, and a decorative shell. The base shell of the outer shell is snapped onto the bottom of the box body. The handle shell wraps around and snaps onto the outer diameter of the handle of the box body. The outer plane of the handle shell is provided with a decorative shell. Above the handle of the milk box, a protrusion is provided corresponding to the main body of the foamer. The air conditioning assembly 8 in the main body of the foamer is located on this side, and the knob 801 of the air conditioning assembly extends out of the main body of the foamer. At the same time, a locking assembly is provided between the air conditioning assembly and the steam drainage assembly 9 on both sides of the main body of the foamer. A milk outlet tube 905 is extended from one side of the support portion below the pressing portion of the locking assembly, or a U-shaped opening is provided at the connection between the foaming cavity 904 of the milk outlet tube and the milk outlet tube.

[0041] The specific motion trajectory of the above-mentioned support part in the track slide groove is as follows: the pressing part is pressed downward, the pressing part pushes the limit link downward, the slide column contacts the downward guide surface and continues to move downward; the pressing part is continued to be pressed downward, the slide column contacts the bottom of the track slide groove, and the pressing of the pressing part is stopped at this time; the pressing part and the limit link rebound, and when the limit link rebounds, it deviates towards the lower limit part under the action of the link spring, and finally stays at the position of the lower limit part; at this time, the push block structure of the pressing part works, and the push block slide rail of the pressing part is inserted into the rear of the spring groove of the movable lock tongue. , the movable lock tongue moves forward and engages with the milk carton, thereby engaging the frother and the milk carton; the pressing part is pressed again, and the limit link deflects out of the lower limit part under the action of the link spring; the pressing part is released, and the pressing part and the limit link rebound upward under the action of the spring. The slide column returns to the upper limit part under the action of the upward guide surface and returns to its initial position; at this time, the pressing part is reset, the push block slide rail of the pressing part and the movable lock tongue fall off, the lock tongue spring presses inward against the movable lock tongue, and the movable lock tongue moves backward, disengaging from the milk carton. Thus, the milk frothing device uses the buttons to disengage and engage the buckle between the frother and the milk carton. The entire operation can be operated with one hand, bringing convenience to the user.

[0042] like Figure 11-13As shown, the foamer of the milk foaming device also includes an air regulation component and a steam drainage component. The air regulation mechanism composed of the air regulation component and the steam drainage component is arranged in the foamer. The air regulation mechanism constitutes the steam inlet, milk inlet and straw, air inlet and regulation part in the above-mentioned foamer. The air regulation component includes a knob, a valve core cover 802, an adjustment rod 803, a valve core 804, an air regulation piece 805, an adjustment sealing ring 806, and a regulator body 807. The regulator body is fixedly connected to the main body of the foamer. The knob of the regulator body extends out of one end of the main body of the foamer. The regulator body of the air regulation component is connected to the milk foam cavity 903 of the steam drainage component through a connecting pipe 7. Buckles 8011 are provided on both sides of the orifice at one end of the knob. Three guide ribs are provided inside the orifice of the knob. There are convex points 8031 ​​on both sides of the outer diameter of the corresponding adjustment rod. There are three guide grooves 8032 on the outer diameter of the orifice at one end of the adjustment rod. The other end of the regulating rod is provided with a valve core mounting groove 8034 at the bottom, a first annular sealing rib 8041 is provided at the bottom of the valve core, an air intake notch 8042 is provided on one side of the first annular sealing rib, and an air intake guide groove 8033 is provided on the side of the regulating rod corresponding to the air intake notch. The air regulating plate is provided with three air vents of different sizes, a second annular sealing rib 8061 is provided on the top of the regulating sealing ring, and an regulating sealing ring groove 8071 is provided on the top of the regulator body; the air regulating plate is fitted and fixed between the first annular sealing rib of the valve core and the second annular sealing rib of the regulating sealing ring, one end of the valve core is inserted into the valve core mounting groove fixed on the regulating rod, and the valve core cover is connected to the regulator body through the regulating rod, while the regulating rod is clamped and fixed between the valve core cover and the regulator body, the regulating sealing ring, the air regulating plate, and the valve core are arranged between the regulating rod and the regulator body, the buckle of the knob is engaged with the convex point of the regulating rod, and the guide groove of the regulating rod is inserted into the guide rib of the knob.

[0043] The diameter of one end of the regulating rod of the valve core is smaller than that of the first annular sealing rib. The raised cylindrical portion of the valve core has air inlet grooves 8043 equidistantly spaced on its outer diameter. These inlet grooves correspond to the ribs provided within the valve core mounting groove of the regulating rod. The air regulating plate and regulating seal ring have correspondingly large and small protrusions on their outer diameters. These protrusions fit into the corresponding large and small grooves within the regulating seal ring groove of the regulator body. The valve core's air inlet grooves are arranged symmetrically in a cross shape. The steam drainage assembly includes a steam inlet 901, a nozzle 902, a milk foam chamber, a foaming chamber, and a milk outlet tube. The steam inlet of the regulator body extends out of the other end of the foamer body. A small sealing ring is located at each end of the nozzle. The nozzle is fixedly mounted in the channel connecting the steam inlet and one end of the milk foam chamber. The milk foam chamber serves as a tee, with the other end of the milk foam chamber connected to one end of the L-shaped foaming chamber, which in turn is connected to the milk outlet tube. Large sealing rings are located at the junctions of the foam chamber, the milk foam chamber, and the milk outlet tube. The third outlet of the milk foam chamber is connected to the straw. A stopper is located on one side of the outer diameter between the two ends of the nozzle. A stopper notch is located on the side of the milk foam chamber opening corresponding to the stopper. The stopper inserts into the stopper notch of the milk foam chamber. A milk pipe cap 906 is installed at the connection between the milk outlet pipe of the steam guide assembly and the foaming chamber. The milk pipe cap is fixed to the outer diameter of the foaming chamber through the buckle hole at the bottom. The milk pipe cap is aligned with the cover hole 401 on one side of the foamer body. The steam inlet of the steam guide assembly is fixed to the foamer body by a buckle 10.

[0044] The specific operating steps of the air adjustment component of the milk frothing device are as follows: First, turn the knob. The guide rib inserted into the guide groove inside the knob is stressed and rotates clockwise into the next guide groove. Simultaneously, the adjustment rod drives the valve core to rotate clockwise. During this rotation, the air inlet notch on the valve core rotates and aligns with the air inlet hole of the air adjustment plate. Because the three air inlet holes are of different sizes, three adjustment levels are achieved. Different levels correspond to different air inlet holes, and the milk foam pattern increases from fine to coarse, and from small to large. Simultaneously, the steam diversion process of the air adjustment component is implemented as follows: Steam enters the steam inlet and is sprayed into the foaming chamber through a nozzle. Air pressure is used to draw milk from the bottom of the foaming chamber into the foaming chamber. The milk then enters the milk frothing chamber through the injection hole at the front of the foaming chamber. The milk foam is then produced by the milk outlet pipe on the right side of the milk frothing chamber. The milk froth is driven by the milk frothing chamber to rotate up and down.

Claims

1. A milk frothing device for a coffee machine, comprising a frothing machine (1) and a milk box (2), wherein the frothing machine comprises a steam inlet, a milk inlet and a straw (11), an air inlet and a regulating portion, and the frothing machine is provided with a locking assembly (6) for disengaging and fastening the frothing machine and the milk box; characterized in that The lock assembly (6) comprises a pressing portion (601), a supporting portion (602), a limiting connecting rod (603), a movable locking tongue (604), a locking tongue spring (605), and a connecting rod spring (606); the supporting portion is fixedly connected to the main body of the foamer (1); a button (3) and a corresponding return spring (5) are provided on the top of the main body of the foamer above the pressing portion of the lock assembly; the pressing portion drives the pressing portion and the supporting portion to move in the vertical direction by pressing the button; the pressing portion is provided with a push block structure in the vertical direction, and the corresponding movable lock The tongue is provided with a push portion; when the pressing portion moves downward, the movable lock tongue is pushed forward to push out the main body of the foamer, and the main body of the foamer is buckled with the milk box (2); when the pressing portion moves upward, the push block structure is separated from the push portion, and the movable lock tongue is returned to its original position by the lock tongue spring, and the main body of the foamer is retracted, and the main body of the foamer is separated from the milk box; the outer diameter side of the support portion (602) of the lock assembly (6) is provided with a track groove (6021), the inner diameter of the corner opening at one end of the bottom of the support portion is provided with a push block slide rail (6022), and the inner side of one end of the limiting connecting rod (603) is provided with a convex groove The sliding column (6031) is raised, the sliding column of the limiting connecting rod is inserted into the track groove on one side of the support part, the lock tongue grooves (6041) on both sides of the movable lock tongue (604) are inserted into the push block slide rail in the support part and move horizontally, and the top of the movable lock tongue is provided with a spring groove (6042) protruding on one side. One end of the lock tongue spring (605) at the spring groove of the movable lock tongue is against the inner wall of the support part, and the other end of the lock tongue spring is inserted into the limiting column in the support part. The spring groove of the movable lock tongue is symmetrical with the other side and the push block slide rail (protruding on one side of the pressing part (601) inserted into the support part) 6011); a raised guide column (6032) is provided on the outside of the other end of the limit link, a limit link is provided on one side of the support portion, and the bottom opening of the pressing portion is inserted from the top of the support portion. At the same time, the guide column of the limit link on the side of the support portion in the pressing portion is inserted into the guide hole (6012) on the side of the pressing portion. The pressing portion drives the limit link to move up and down through the guide hole and the guide column. At the same time, the limit link rotates around the axis of the guide hole and the guide column. One end of the link spring (606) on the outside of the pressing portion is connected to the tension spring column on the outside of the other end of the limit link exposed from the pressing plate.

2. The milk foaming device of a coffee machine according to claim 1, characterized in that The connecting rod spring (606) is omitted on one side of the pressing portion (601) of the locking assembly (6).

3. The milk foaming device of a coffee machine according to claim 1, characterized in that The track chute (6021) of the support portion (602) is provided with an upper limit portion (60211), a lower limit portion (60212), an upper reversing portion (60213), a lower reversing portion (60214), a downward guide surface (60215), and an upward guide surface (60216). The upper limit portion is located at the top of the entire track chute, and the track chute matches the slide column (6031) of the limit link (603) and is concave; the upper reversing portion is provided at the top of the central eccentric column (6023) in the track chute, and the upper reversing portion deviates from the center of the upper limit portion in a vertical direction; a downward guide surface 60215 is provided on the outer side of the track chute on one side of the upper reversing portion of the central eccentric column and on the side below the upper limit portion, and the downward guide surface It is smoothly connected to the guide rail slot between the upper reversing part; the lower limit part is arranged at the groove of the central eccentric column below the upper reversing part, and a check part (60217) is provided at the intersection of the other side of the groove of the lower limit part of the central eccentric column and the downward guide surface. The position of the check part is lower than the lower limit part, and a closed loop is formed through the downward guide surface and the check part of the track slot; a lower reversing part protruding upward is provided at the bottom of the outer side surface of the track slot and below the lower limit part of the central eccentric column, and the lower reversing part is matched with the slide column of the limit link and is concave; an upward guide surface is provided on the outer side surface of the track slot and the center eccentric column on the other side symmetrical to the upper reversing part away from the downward guide surface, and the upward guide surface is smoothly connected to the upper limit part and the lower reversing part to form a closed loop.

4. The milk foaming device of a coffee machine according to claim 3, characterized in that The track groove (6021) of the support part (602) and the central eccentric column (6023) in the track groove are in a concave heart shape, corresponding to the top protrusion of the central eccentric column is eccentrically arranged toward the side of the downward guide surface (60215), and the sliding column (6031) of the limiting connecting rod (603) is located in a closed loop between the track groove of the support part and the central eccentric column.

5. The milk foaming device of a coffee machine according to claim 1, characterized in that Two or more evenly arranged guide structures are provided between the button (3) and the main body of the foamer (1), two or more evenly arranged return springs (5) are provided between the button and the main body of the foamer, and the button is provided with two or more evenly arranged limit buckles.

6. The milk foaming device of a coffee machine according to claim 5, characterized in that The main body of the foamer (1) comprises a foaming cover (4) and a foaming seat (12); a button (3) is arranged on the top of the foaming cover, and is inserted into the barb holes (402) fixed to the foaming cover through the barb (302) symmetrically arranged in pairs at the bottom of the button; return springs (5) symmetrically arranged in pairs between the button and the foaming cover are respectively inserted into the spring columns (301) at the bottom of the button; the button is a square protrusion arranged on the top of the square foaming cover.

7. The milk foaming device of a coffee machine according to claim 5, characterized in that One side of the milk box (2) is provided with a handle (201), which is arranged on an outer cover shell outside the box body of the milk box, and the outer cover shell comprises a base shell, a handle shell and a decorative shell, the base shell of the outer cover shell is buckled with the bottom of the box body, the handle shell wraps around and buckles with the outer diameter of the handle of the box body, and the outer plane of the handle shell is provided with a decorative shell.

8. The milk foaming device of a coffee machine according to claim 7, characterized in that A protrusion is provided corresponding to the main body of the foamer (1) above the handle (201) of the milk box (2), and an air conditioning component (8) is located in the main body of the foamer on this side, with a knob (801) of the air conditioning component extending out of the main body of the foamer.

9. The milk foaming device of a coffee machine according to claim 1, characterized in that The locking assembly (6) is arranged between the air conditioning assembly (8) and the steam drainage assembly (9) on both sides of the main body of the foamer (1), and a milk outlet pipe (905) is provided on one side of the supporting portion (602) below the pressing portion (601) of the locking assembly, or a U-shaped opening at the connection between the foaming cavity (904) and the milk outlet pipe.

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