Detachable coffee machine milk foaming device and foaming mechanism thereof

Abstract

The invention relates to a detachable coffee machine milk foaming device and a foaming mechanism thereof, and aims to solve the technical problems that existing like products are inconvenient to disassemble, assemble and clean and poor in milk foaming effect, and particularly, a bubbler assembly is hardly disassembled from a knob in the middle of the bottom of a lower cover of a milk box. The milk frothing device is characterized in that a knob is arranged in the middle of a milk box lower cover in a milk box of the milk frothing device of the coffee machine, raised inverted buckles are arranged at the bottom of the knob at equal intervals in pairs and respectively extend out of L-shaped holes of the milk box lower cover, and meanwhile, the inverted buckles are buckled with buckling ribs on the inner wall of an inner sleeve raised in the center in a milk box upper cover through rotation; limiting openings for installing and fixing the bubbler assembly are formed in the two sides of the inner sleeve in the milk box upper cover respectively. A bubbler inner plug is arranged in a bubbler main pipe at one end of the connection part of the bubbler main pipe of the bubbler assembly and a bubbler main body, a bubbler inner plug is fixedly arranged in an orifice at a bulge at the end part of the bubbler main body, and a positioning column of the bubbler main body is screwed into an L-shaped groove at a plug opening of the bubbler inner plug.

Description

Technical Field

[0001] The invention relates to a milk frothing device for a coffee machine, in particular to a detachable milk frothing device for a coffee machine and a frothing mechanism thereof. Background Art

[0002] A coffee machine is an electrical device used for making coffee. It is generally divided into semi-automatic and fully automatic types. Among them, a semi-automatic coffee machine is a traditional Italian coffee machine that is manually operated to grind, press, load, brew, and manually remove residues. Some coffee machines require a milk frothing device to improve the taste of the drink. There are generally three ways to achieve milk frothing in existing coffee machines: steam rod, straw, and milk box. The implementation principles of the above three methods are basically the same. They are all based on the Venturi effect to inhale air or milk through high-speed steam to form milk froth. In existing coffee machines, some devices with milk frothing functions are usually integrated with the main body of the coffee machine, which causes some inconveniences during use and cleaning. On the one hand, the integrated design makes the design of the milk frothing device complicated, and the parts are fixed with screws, which affects the production efficiency. Consumers cannot disassemble the parts and it is difficult to clean them thoroughly; on the other hand, it is easy to breed bacteria, affecting the sanitary quality of coffee drinks. For this reason, for example, the application number 202410794481.1 disclosed in the Chinese patent literature, the application publication date is 2024.08.16, and the invention name is "A milk frothing device and a coffee machine with the device"; for example, the application number 202310673296.2 disclosed in the Chinese patent literature, the application publication date is 2023.10.03, and the invention name is "Milk frothing device and its milk frothing air intake assembly and button lock assembly"; but the above-mentioned products and similar products mainly remove the box cover by pressing buttons, but after the box cover is removed, the knob in the middle of the bottom of the lower cover of the milk box is rarely used to remove the frother assembly. At the same time, the internal structure design of the existing frother assembly is poor, resulting in poor Venturi effect and poor milk frothing effect. The nipple and the milk box occupy a large space, and the layout rationality is poor. Summary of the invention

[0003] In order to overcome the above shortcomings, the purpose of the present invention is to provide a fully detachable detachable coffee machine milk frothing device and its frothing mechanism without screw-fixed parts in the art, so as to solve the technical problems that the existing similar products rarely use the knob in the middle of the bottom of the milk box lower cover to disassemble the frothing device assembly after the box cover is disassembled, and the existing frothing device assembly has poor internal structure design, resulting in poor Venturi effect and milk frothing effect, large space occupied by the nipple and milk box, and poor layout rationality. The purpose is achieved through the following technical solutions.

[0004] A detachable milk frothing device for a coffee machine comprises a milk box, a milk box lower cover, a milk box upper cover and a foamer assembly, wherein the foamer assembly comprises an air inlet assembly, a steam inlet assembly, a nipple assembly and a straw assembly; the foamer assembly is fixedly arranged in a groove at the top of the milk box lower cover and between the milk box lower cover and the milk box upper cover in the milk box upper cover, the outer diameter of the top notch of the milk box lower cover and the inner diameter of the bottom cover of the milk box upper cover are buckled and connected as one, and the foamer assembly is buckled and fixed to the box opening at the top of the milk box through a lock assembly arranged on the milk box lower cover or the milk box upper cover, the steam inlet at the steam inlet assembly of the foamer assembly and the milk outlet at the nipple assembly extend out of the milk box upper cover respectively, and the straw body at the straw assembly of the foamer assembly extends into the milk box through the milk box lower cover respectively. The key points of the structural design are that a knob is provided in the middle of the lower cover of the milk box in the milk box, and the raised undercuts at the bottom of the knob are arranged equidistantly and extend out of the L-shaped holes of the lower cover of the milk box respectively. At the same time, the undercuts are buckled with the buckle ribs of the inner wall of the inner sleeve raised in the center of the upper cover of the milk box through rotation, and the inner sleeve in the upper cover of the milk box is respectively provided with limit openings for installing and fixing the bubbler assembly. Therefore, after the box cover composed of the lower cover of the milk box, the upper cover of the milk box and the bubbler assembly is disassembled through the lock assembly, the bubbler assembly is disassembled from the knob in the middle of the bottom of the lower cover of the milk box for cleaning or component replacement.

[0005] The circular surface of the knob in the milk box is embedded in the lower cover of the milk box and is flush with the plane of the lower cover of the milk box. A raised rotating rib is provided in the middle of the semicircular groove of the knob in the milk box. A knob groove is correspondingly provided at the bottom of the knob at the bottom of the rotating rib. The undercuts are equidistantly arranged on the raised arc surfaces on both sides of the knob groove at the bottom of the knob. A through hole is provided on the plane of the lower cover of the milk box outside the knob.

[0006] The lock assembly is symmetrically arranged on both sides of the upper cover of the milk box, and the lock body of the lock assembly is arranged in the lock groove at the outer diameter of the inner sleeve protruding in the center of the upper cover of the milk box, and the protruding rotating shafts on both sides of the lock body are respectively snap-fastened in the snap-fastened grooves in the lock grooves, and the pressing parts on the outside of the lock body respectively leak out of the lock holes on both sides of the upper cover of the milk box, and the hook parts of the lock body respectively extend out of the bottom cover opening of the upper cover of the milk box and the side grooves on both sides of the lower cover of the milk box, and are simultaneously snap-fastened and fixed to the hook grooves on both sides of the top box opening of the milk box, and lock springs are respectively provided between the lock body and the inner wall of the upper cover of the milk box.

[0007] The milk box is connected to the milk box cover to form a rectangular parallelepiped. The outer diameter of one side of the nipple assembly of the milk box is set with a transition slope from the top to the top of the bottom and inward. The nipple assembly corresponding to the outer side of the transition slope is obliquely set on the outer diameter of the milk box.

[0008] A lower rib groove is provided on one side of the top box opening of the milk box, a positioning rib is provided on the side of the lower cover of the milk box corresponding to the lower rib groove, an upper rib groove is provided on the side of the upper cover of the milk box corresponding to the positioning rib, and the positioning rib of the lower cover of the milk box corresponds to the upper rib groove of the upper cover of the milk box and the lower rib groove of the milk box for guiding the loading.

[0009] The main body of the frothing mechanism of the milk frothing device of the coffee machine is a frothing machine component, wherein a frothing machine main pipe at one end of the connection between the frothing machine main pipe of the frothing machine component and the frothing machine main body of the steam inlet component is provided with a frothing machine pipe inner plug, the outer diameter of the frothing machine main pipe inner plug is provided with a two-level step circumference, the outer diameter of the frothing machine main body in the frothing machine main pipe is provided with a three-level step circumference, the pipe opening on this side of the frothing machine main pipe is provided with a frothing machine pipe cover, another level of step circumference on the outer diameter of the frothing machine main body, and one end of the frothing machine pipe cover is limited to the pipe opening of the frothing machine main pipe, while a positioning block protruding from the outer diameter of the frothing machine main body interferes with the other end of the frothing machine pipe cover and is screwed into the spiral hole on one side of the frothing machine pipe cover to a locking position; A bubbler plug is fixedly arranged in the orifice at the end protrusion, and a positioning column is symmetrically arranged on the outer diameter of the orifice at the end protrusion, and the positioning column is screwed into the L-shaped groove opened at the plug mouth of the bubbler tube plug in the bubbler main pipe, and symmetrical bubble grooves and bubble holes are respectively arranged on both sides of the outer diameter between the three-step step circumference of the bubbler main body and the orifice at the end protrusion; the bubbler main pipe is a venturi tube with a tapered diameter increasing in sequence between the bubbler tube plug at one end of the steam inlet component and the three-step step circumference of the bubbler main body, and the bubbler main body end of the bubbler main pipe where the bubbler main body and the bubbler tube plug are connected are respectively provided with a mounting hole at the air inlet component and a connecting hole at the straw component, and a nipple component is symmetrically arranged on the bubbler main pipe at the other end of the steam inlet component. Therefore, the steam entering the steam inlet component, the milk entering the straw component, and the air entering the air inlet component form mixed foam in the bubbler main pipe, the bubbler tube plug at the steam inlet component, and the bubbler main body, and finally the foaming is sprayed out from the nipple component.

[0010] The nipple body of the nipple assembly is inclined " L ", one end of the nipple body is installed into the notch of the inner diameter of the hole at the upper cover of the milk box through the limiting rib with raised outer diameter of the port, connected with the main pipe of the bubbler, and then rotated and fixed, and the limiting ring with raised outer diameter of the nipple body at the limiting rib is pressed against the hole at the upper cover of the milk box for limiting.

[0011] The other end of the nipple body is provided with a telescopic milk tube, and a telescopic milk tube sealing ring is provided at the connection between the telescopic milk tube and the nipple body.

[0012] A milk box joint sealing ring is provided in the orifice at the other end of the bubbler body of the steam inlet assembly and is fastened and fixed in the bubbler body through the bubbler cover. The outer diameter and the aperture of the milk box joint sealing ring are larger than the outer diameter and the aperture of the bubbler inner plug. A transition cavity is provided between the bubbler inner plug and the milk box joint sealing ring bracket in the bubbler body.

[0013] The straw main body of the straw assembly is connected to the bubbler main pipe through a straw joint, and a straw inner plug is arranged in the straw joint at the connection.

[0014] A milk box air inlet sheet is provided in the air inlet port at one end of the air inlet body of the air inlet assembly, and an orifice at the other end of the air inlet body is connected to the connecting hole of the straw assembly of the bubbler main pipe, a duckbill is provided in the connecting hole of the bubbler main pipe at the connecting point, a flat mouth at one end of the duckbill is inserted into the connecting hole of the bubbler main pipe, and a round hole at the other end of the duckbill is limited to the orifice at the connecting hole of the bubbler main pipe, the air inlet assembly is arranged in the upper cover of the milk box, and an air inlet gap is provided between the air inlet assembly and the inner wall of the upper cover of the milk box.

[0015] The structure of the present invention has reasonable structural design, is easy to disassemble and clean as a whole, has good frothing effect, occupies little space for the nipple and the milk box, and is particularly convenient for disassembly, cleaning and replacement of the frothing device assembly and parts in the box cover. The present invention is suitable for use as a detachable coffee machine milk frothing device and its frothing mechanism, as well as a structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the explosion structure of the present invention.

[0017] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure after assembly.

[0018] Figure 3 yes Figure 2 Schematic diagram of the bottom structure after the box cover is opened, with the milk box omitted in the figure.

[0019] Figure 4 yes Figure 3 Schematic diagram of the structure of the bubbler assembly in the box cover.

[0020] Figure 5 yes Figure 4 The internal structure of the bubbler main pipe, the dotted line in the figure is the bubbler main pipe.

[0021] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure after the bubbler tube inner plug, bubbler tube cover and bubbler body are assembled.

[0022] Figure 7 yes Figure 2 The cross-sectional structure of Figure 1 .

[0023] Figure 8 yes Figure 2 The cross-sectional structure of Figure 2 .

[0024] Fig. 9 yes Figure 2 The cross-sectional structure of Figure 3 .

[0025] Fig.10 yes Figure 3Schematic diagram of the structure of the frother assembly, the milk box upper cover, and the milk box lower cover in the open state.

[0026] Serial number and name of the attached drawings: 1. milk box, 101. hook slot, 102. lower rib slot, 2. knob, 201. inverted, 3. lower cover of milk box, 301. L-shaped hole, 302. positioning rib, 4. air intake assembly, 401. air intake sheet of milk box, 402. air intake body, 403. duckbill, 5. steam inlet assembly, 501. bubbler cover, 502. milk box joint sealing ring, 503. bubbler inner plug, 504. bubbler body, 5041. positioning block, 5042. positioning column, 5043. bubbler slot, 5044. bubbler hole, 6. Bubble aerator main pipe, 7, milk box cover, 701, inner sleeve, 7011, buckle rib, 8, nipple assembly, 801, nipple body, 8011, limiting rib, 8012, limiting ring, 802, telescopic milk tube sealing ring, 803, telescopic milk tube, 9, locking assembly, 901, locking body, 902, locking spring, 10, straw assembly, 1001, straw body, 1002, straw joint, 1003, straw inner plug, 11, bubble tube inner plug, 1101, L-shaped groove, 12, bubble tube cover, 1201, spiral hole. Implementation

[0027] Now, the structure and use of the present invention will be further described in conjunction with the accompanying drawings. Figure 1-Figure 10 As shown, the milk frothing device of the coffee machine comprises a milk box 1, a milk box lower cover 3, a milk box upper cover 7 and a bubbler assembly, wherein the bubbler assembly comprises an air inlet assembly 4, a steam inlet assembly 5, a nipple assembly 8 and a straw assembly 10; the bubbler assembly is fixedly arranged in a groove at the top of the milk box lower cover, and between the milk box lower cover and the milk box upper cover in the milk box upper cover, the outer diameter of the top notch of the milk box lower cover and the inner diameter of the bottom cover of the milk box upper cover are buckled and connected as a whole, and are buckled and fixed to the box opening at the top of the milk box by a lock assembly 9 arranged on the milk box lower cover or the milk box upper cover, the steam inlet at the steam inlet assembly of the bubbler assembly and the milk outlet at the nipple assembly extend out of the milk box upper cover respectively, and the straw body 1001 at the straw assembly of the bubbler assembly extends into the milk box through the milk box lower cover respectively.

[0028] The specific structure is as follows: a knob 2 is provided in the middle of the lower cover of the milk box in the milk box, and the raised undercuts 201 at the bottom of the knob are arranged equidistantly in pairs and extend out of the L-shaped hole 301 of the lower cover of the milk box respectively. At the same time, the undercuts are engaged with the buckle ribs 7011 of the inner wall of the inner sleeve 701 raised in the center of the upper cover of the milk box by rotation, and the inner sleeve in the upper cover of the milk box is provided with limit openings for installing and fixing the bubbler assembly on both sides. The circular surface of the knob in the milk box is embedded in the lower cover of the milk box and is flush with the plane of the lower cover of the milk box. A raised rotating rib is provided in the middle of the semicircular groove of the knob in the milk box, and a knob groove is provided at the bottom of the knob at the bottom of the rotating rib. The undercuts are arranged equidistantly in pairs on the raised arc surfaces on both sides of the knob groove at the bottom of the knob, and a through hole is provided on the plane of the lower cover of the milk box outside the knob. The above-mentioned lock assembly is symmetrically arranged on both sides of the upper cover of the milk box, and the lock body 901 of the lock assembly is arranged at the lock groove at the outer diameter of the inner sleeve protruding in the center of the upper cover of the milk box. The protruding rotating shafts on both sides of the lock body are respectively snap-fastened and fixed in the snap grooves in the lock groove, and the pressing parts on the outside of the lock body leak out of the lock holes on both sides of the upper cover of the milk box, and the hook parts of the lock body extend out of the bottom cover of the milk box and the side grooves on both sides of the lower cover of the milk box, and are snap-fastened and fixed to the hook grooves 101 on both sides of the top box opening of the milk box at the same time, and lock springs 902 are respectively arranged between the lock body and the inner wall of the upper cover of the milk box. The above-mentioned milk box is connected to the upper cover of the milk box to form a rectangular parallelepiped, and the outer diameter of the nipple assembly of the milk box is arranged from the top to the bottom and inwardly. The nipple assembly corresponding to the outer side of the transition slope is obliquely arranged on the outer diameter of the milk box. A lower rib groove 102 is provided on one side of the top box opening of the milk box, a positioning rib 302 is provided on the side of the lower cover of the milk box corresponding to the lower rib groove, an upper rib groove is provided on the side of the upper cover of the milk box corresponding to the positioning rib, and the positioning rib of the lower cover of the milk box corresponds to the upper rib groove of the upper cover of the milk box and the lower rib groove of the milk box for guiding the loading.

[0029] A bubbler pipe inner plug 11 is provided in the bubbler pipe at one end of the connection between the bubbler pipe of the bubbler assembly and the bubbler body 504 of the steam inlet assembly, the outer diameter of the bubbler pipe inner plug in the bubbler pipe is provided with a two-level step circumference, the outer diameter of the bubbler body in the bubbler pipe is provided with a three-level step circumference, the pipe opening on this side of the bubbler pipe is provided with a bubbler pipe cover 12, another level of step circumference on the outer diameter of the bubbler body, and one end cover opening of the bubbler pipe cover are limited to the pipe opening of the bubbler pipe, while the positioning block 5041 raised on the outer diameter of the bubbler body interferes with the other end cover opening of the bubbler pipe cover and is screwed into the spiral hole 1201 on one side of the bubbler pipe cover to the locking position; a bubbler pipe is fixedly provided in the hole at the end convexity of the bubbler body in the bubbler pipe The bubbler inner plug 503, the outer diameter of the hole at the end protrusion is symmetrically provided with a positioning column 5042, the positioning column is screwed into the L-shaped groove 1101 opened at the plug mouth of the bubbler tube inner plug in the bubbler main pipe, and symmetrical bubble grooves 5043 and bubble holes 5044 are respectively provided on both sides of the outer diameter between the three-step step circumference of the bubbler main body and the hole at the end protrusion; the bubbler main pipe is a venturi tube with a conical diameter increasing successively on the three-step step circumference of the bubbler tube inner plug at one end of the steam inlet assembly and the bubbler main body, and the one side of the bubbler main body end where the bubbler main body and the bubbler tube inner plug are connected in the bubbler main pipe is respectively provided with a mounting hole at the air inlet assembly and a connecting hole at the straw assembly, and the bubbler main pipe at the other end of the steam inlet assembly is symmetrically provided with a nipple assembly.

[0030] The nipple body 801 of the nipple assembly is inclined " L ", one end of the nipple body is connected to the bubbler main pipe through the limit rib 8011 with the outer diameter of the port protruding, corresponding to the notch of the inner diameter of the hole on the upper cover of the milk box, and then rotated and fixed, and the limit ring 8012 with the outer diameter of the nipple body protruding at the limit rib is abutted against the hole on the upper cover of the milk box for limiting; the other end of the nipple body is provided with a telescopic milk tube 803, and the connection between the telescopic milk tube and the nipple body is provided with a telescopic milk tube sealing ring 802. The hole at the other end of the bubbler body of the steam inlet assembly is provided with a milk box joint sealing ring 502 fixed in the bubbler body through the bubbler cover 501, the outer diameter and aperture of the milk box joint sealing ring are larger than the outer diameter and aperture of the bubbler inner plug 503, and the bubbler body A transition cavity is provided between the inner plug of the inner bubbler and the sealing ring bracket of the milk box joint. The straw body 1001 of the straw assembly is connected to the bubbler main pipe through the straw joint 1002, and a straw inner plug 1003 is provided in the straw joint at the connection. A milk box air inlet sheet 401 is provided in the air inlet at one end of the air inlet body 402 of the air inlet assembly, and the orifice at the other end of the air inlet body is connected to the connecting hole of the straw assembly of the bubbler main pipe, and a duckbill 403 is provided in the connecting hole of the bubbler main pipe at the connection, and the flat mouth at one end of the duckbill is inserted into the connecting hole of the bubbler main pipe, and the round hole at the other end of the duckbill is limited to the orifice at the connecting hole of the bubbler main pipe, and the air inlet assembly is arranged in the upper cover of the milk box, and an air inlet gap is provided between the air inlet assembly and the inner wall of the upper cover of the milk box.

[0031] When in use, the coffee machine milk frothing device is placed on one side of the coffee machine, the steam inlet assembly is connected to the steam port of the coffee machine, and the frothing button of the coffee machine is pressed, the coffee machine provides steam, and the frothing assembly frothes the milk, and the milk in the milk box is frothed and sprayed out from the nipple assembly. When the coffee machine milk frothing device needs to be cleaned or replaced, the user can easily remove the coffee machine milk frothing device from the coffee machine body for separate cleaning or maintenance.

[0032] At the same time, the fixing method of the nipple assembly described above rotates the nipple assembly 180° upward, and one end of the nipple body is inserted into the notch of the inner diameter of the hole on the upper cover of the milk box through the limit rib raised by the outer diameter of the port, and then rotated to a certain angle; the structure is easy to disassemble and easy to clean; the telescopic milk tube has a wide range of uses and can be applied to a variety of different cups. The fixing method of the knob removes the box cover from the milk box through the lock assembly and then inverts it. When the button is fixed, the button is placed downward into the lower cover of the milk box and rotated to the right about 22° to the locking mark. The fixing method of the lock assembly After the lock assembly is installed in place, the box cover is placed in the milk box, and the lock assembly is buckled and fixed with the milk box; when the milk box needs to be taken out, press the lock assemblies on both sides, and the lock assembly and the milk box buckle will be disengaged, and the milk box or the box cover can be easily taken out.

[0033] In summary, the milk frothing device of the coffee machine adopts a matching spring to realize the extension and retraction of the locking assembly, fix and remove the milk box, and the operation is convenient and reliable; at the same time, the upper cover and the lower cover of the milk box adopt a knob buckle structure to achieve disassembly and clean the internal milk passing parts; and the nipple assembly adopts a retractable milk tube design, which can be suitable for different cup types.

Claims

1. A detachable coffee machine milk frothing device, the coffee machine milk frothing device comprising a milk box (1), a milk box lower cover (3), a milk box upper cover (7) and a foamer assembly, the foamer assembly comprising an air inlet assembly (4), a steam inlet assembly (5), a nipple assembly (8) and a straw assembly (10); the foamer assembly is fixedly arranged in a groove at the top of the milk box lower cover and between the milk box lower cover and the milk box upper cover in the milk box upper cover, the outer diameter of the top notch of the milk box lower cover and the inner diameter of the bottom cover of the milk box upper cover are snap-fitted and connected as a whole, and is snap-fitted and fixed to the box opening at the top of the milk box by a lock assembly (9) arranged on the milk box lower cover or the milk box upper cover, the steam inlet at the steam inlet assembly of the foamer assembly and the milk outlet at the nipple assembly respectively extend out of the milk box upper cover, and the straw body (1001) at the straw assembly of the foamer assembly respectively extends into the milk box through the milk box lower cover; characterized in that A knob (2) is provided in the middle of the lower cover (3) of the milk box in the milk box (1), and raised undercuts (201) are arranged equidistantly in pairs at the bottom of the knob and extend out of the L-shaped holes (301) of the lower cover of the milk box. At the same time, the undercuts are rotated to engage with the buckle ribs (7011) on the inner wall of the inner sleeve (701) raised in the center of the upper cover (7) of the milk box, and limiting openings for installing and fixing the bubbler assembly are provided on both sides of the inner sleeve in the upper cover of the milk box.

2. The detachable coffee machine milk frothing device according to claim 1, characterized in that The circular surface of the knob (2) in the milk box (1) is embedded in the lower cover (3) of the milk box and is flush with the plane of the lower cover of the milk box. A raised rotating rib is provided in the middle of the semicircular groove of the knob in the milk box. A knob groove is provided at the bottom of the knob at the bottom of the rotating rib. The undercuts (201) are equidistantly arranged on the raised arc surfaces on both sides of the knob groove at the bottom of the knob. A through hole is provided on the plane of the lower cover of the milk box outside the knob.

3. The detachable coffee machine milk frothing device according to claim 1, characterized in that The lock assembly (9) is symmetrically arranged on both sides of the milk box upper cover (7), and the lock body (901) of the lock assembly is arranged in a lock groove at the outer diameter of the inner sleeve (701) protruding from the center of the milk box upper cover. The protruding rotating shafts on both sides of the lock body are respectively snap-fastened in the snap grooves in the lock groove, and the pressing parts on the outer side of the lock body respectively leak out of the lock holes on both sides of the milk box upper cover. The hook parts of the lock body respectively extend out of the bottom cover opening of the milk box upper cover and the side grooves on both sides of the milk box lower cover (3), and are simultaneously snap-fastened and fixed to the hook grooves (101) on both sides of the top box opening of the milk box (1), and lock springs (902) are respectively arranged between the lock body and the inner wall of the milk box upper cover.

4. The detachable coffee machine milk frothing device according to claim 1, characterized in that The milk box (1) is connected to the milk box upper cover (7) to form a rectangular parallelepiped, and the outer diameter of one side of the nipple assembly (8) of the milk box is arranged with a transition slope from the top to the top of the bottom and inward, and the nipple assembly corresponding to the outer side of the transition slope is arranged obliquely on the outer diameter of the milk box.

5. The detachable coffee machine milk frothing device according to claim 1, characterized in that A lower rib groove (102) is provided on one side of the top box opening of the milk box (1); a positioning rib (302) is provided on one side of the lower cover (3) of the milk box corresponding to the lower rib groove; an upper rib groove is provided on one side of the upper cover (7) of the milk box corresponding to the positioning rib; the positioning rib of the lower cover of the milk box corresponds to the upper rib groove of the upper cover of the milk box and the lower rib groove of the milk box for guiding the milk box to be loaded.

6. A detachable frothing mechanism of a milk frothing device of a coffee machine, the main body of the frothing mechanism being a frothing assembly, characterized in that A bubbler pipe inner plug (11) is provided in the bubbler pipe at one end of the connection between the bubbler pipe (6) of the bubbler assembly and the bubbler body (504) of the steam inlet assembly (5); the outer diameter of the bubbler pipe inner plug in the bubbler pipe is provided with a two-level step circumference; the outer diameter of the bubbler body in the bubbler pipe is provided with a three-level step circumference; a bubbler pipe cover (12) is provided at the pipe opening on this side of the bubbler pipe; another level of step circumference of the outer diameter of the bubbler body and a cover opening at one end of the bubbler pipe cover are limited to the pipe opening of the bubbler pipe; a positioning block (5041) with a protrusion on the outer diameter of the bubbler body is interference fit over the cover opening at the other end of the bubble pipe cover and is screwed into a spiral hole (1201) on one side of the bubble pipe cover to a locking position; a bubbler is fixedly provided in the protrusion at the end of the bubbler body in the bubbler pipe. The inner plug (503) is symmetrically provided with positioning posts (5042) on the outer diameter of the orifice at the end protrusion, and the positioning posts are screwed into the L-shaped groove (1101) opened at the plug mouth of the bubbler tube inner plug in the bubbler main pipe, and symmetrical bubble grooves (5043) and bubble holes (5044) are respectively provided on both sides of the outer diameter between the three-step step circumference of the bubbler main body and the orifice at the end protrusion; the bubbler main pipe is a venturi tube with a bubbler tube inner plug at one end of the steam inlet component and a three-step step circumference of the bubbler main body with tapered diameters increasing in sequence, and a mounting hole at the air inlet component (4) and a connecting hole at the straw component (10) are respectively provided on one side of the bubbler main body end where the bubbler main body and the bubbler tube inner plug are connected in the bubbler main pipe, and a nipple component (8) is symmetrically provided on the bubbler main pipe at the other end of the steam inlet component.

7. The frothing mechanism of the detachable milk frothing device of the coffee machine according to claim 6, characterized in that The nipple body (801) of the nipple assembly (8) is inclined. L ", one end of the nipple body is inserted into the notch of the inner diameter of the hole at the milk box upper cover (7) through a limiting rib (8011) with a raised outer diameter of the port, connected to the bubbler main pipe (6), and then rotated and fixed, and a limiting ring (8012) with a raised outer diameter of the nipple body at the limiting rib is abutted against the hole at the milk box upper cover for limiting; the other end of the nipple body is provided with a telescopic milk tube (803), and a telescopic milk tube sealing ring (802) is provided at the connection between the telescopic milk tube and the nipple body.

8. The frothing mechanism of the detachable milk frothing device of the coffee machine according to claim 6, characterized in that A milk box joint sealing ring (502) is provided in the opening at the other end of the bubbler body (504) of the steam inlet assembly (5) and is fastened and fixed to the bubbler body through the bubbler cover (501); the outer diameter and the aperture of the milk box joint sealing ring are larger than the outer diameter and the aperture of the bubbler inner plug (503); and a transition cavity is provided between the bubbler inner plug and the milk box joint sealing ring bracket in the bubbler body.

9. The frothing mechanism of the detachable milk frothing device of the coffee machine according to claim 6, characterized in that The straw main body (1001) of the straw assembly (10) is connected to the bubbler main pipe (6) via a straw joint (1002), and a straw inner plug (1003) is provided in the straw joint at the connection point.

10. The frothing mechanism of the detachable milk frothing device of the coffee machine according to claim 6, characterized in that A milk box air inlet sheet (401) is provided in the air inlet of one end of the air inlet body (402) of the air inlet assembly (4), and an opening at the other end of the air inlet body is connected to a connecting hole of the straw assembly of the bubbler main pipe (6), and a duckbill (403) is provided in the connecting hole of the bubbler main pipe at the connecting point, and a flat opening at one end of the duckbill is inserted into the connecting hole of the bubbler main pipe, and a round opening at the other end of the duckbill is limited to the opening of the connecting hole of the bubbler main pipe, and the air inlet assembly is arranged in the milk box upper cover (7), and an air inlet gap is provided between the air inlet assembly and the inner wall of the milk box upper cover.

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