Transformer locking mechanism and coffee maker

Abstract

The utility model relates to a transformer locking mechanism and coffee machine belong to the field of coffee machine, transformer locking mechanism includes: base subassembly, transformer subassembly, the transformer subassembly sets up on base subassembly, cover shell subassembly, the cover shell subassembly covers and sets up on transformer subassembly, the cover shell subassembly cooperates with base subassembly, the transformer subassembly is located between base subassembly and cover shell subassembly, one of base subassembly and cover shell subassembly is equipped with cooperation structure, and the other of base subassembly and cover shell subassembly is equipped with cooperation space, and cooperation structure cooperates with cooperation space. The transformer locking mechanism cover shell subassembly of the application covers transformer subassembly can effectively limit the displacement of transformer subassembly in multiple directions such as up and down, left and right, and improve the stability of transformer subassembly.

Description

Technical Field

[0001] This utility model relates to the field of coffee machines, and in particular to a transformer locking mechanism and a coffee machine. Background Technology

[0002] In the coffee machine industry, the fixing and installation of the transformer affects the stability of the coffee machine's operation. However, the transformer in traditional coffee machines is generally installed with screws. This installation method has poor reliability, and after long-term use, the threads are prone to loosening, leading to a decrease in locking force. This increases the need for regular maintenance and thus increases maintenance costs. Therefore, it is necessary to improve this method to address this deficiency. Utility Model Content

[0003] Therefore, it is necessary to address the issue that traditional coffee machine transformers are generally installed with screws, which are prone to loosening and weakening of locking force after prolonged use, increasing the need for regular maintenance and thus raising maintenance costs. A transformer locking mechanism and coffee machine should be provided.

[0004] A transformer locking mechanism includes: a base assembly; a transformer assembly disposed on the base assembly; and a cover assembly covering the transformer assembly, the cover assembly cooperating with the base assembly, the transformer assembly being located between the base assembly and the cover assembly; one of the base assembly and the cover assembly having a mating structure, and the other of the base assembly and the cover assembly having a mating space, the mating structure mating with the mating space.

[0005] The first aspect of this application discloses a transformer locking mechanism. Through the cooperation of a mating structure and a mating space, the housing assembly and the base assembly are mated to stably lock the transformer assembly. Specifically, during assembly, the transformer assembly is simply placed on the base assembly, and then the housing assembly is placed over the transformer assembly. The mating structure in the base assembly and housing assembly is then embedded in the mating space to complete the fixation. The entire assembly method is simple and convenient, effectively reducing assembly time and operational complexity. The cooperation of the mating structure and the mating space ensures that the transformer assembly does not suffer from locking failure during long-term use, significantly reducing the need for regular maintenance of the transformer assembly's fixing structure. This design eliminates the need for frequent screw checks and tightening, reducing the workload of maintenance personnel and saving on potential labor and parts replacement costs, thus significantly improving the economic efficiency of the coffee machine. Furthermore, the housing assembly covering the transformer assembly effectively restricts the displacement of the transformer assembly in multiple directions, such as up and down, left and right. This all-round limiting effect on the transformer assembly prevents the transformer assembly from shaking or shifting due to loosening during the operation of the coffee machine, ensuring the connection stability between the transformer assembly and surrounding circuits and components. This provides a reliable structural guarantee for the stable operation of the transformer assembly and further improves the overall working stability of the coffee machine.

[0006] In one embodiment, the base assembly has a limiting groove, and the transformer assembly is disposed on the base assembly and located at the limiting groove. By positioning the transformer assembly at the limiting groove, the limiting groove restricts the degree of freedom of the transformer assembly, ensuring that the transformer assembly is always in the preset working position after installation, thus guaranteeing the stability of the transformer assembly's operation. During assembly, the operator only needs to place the transformer assembly correspondingly in the limiting groove to quickly complete the initial positioning, making the operation simple and convenient.

[0007] In one embodiment, the base assembly includes a base body and a limiting shell. The transformer assembly is disposed on the base body, and the limiting shell is disposed on the base body. The limiting shell and the base body enclose each other to form a limiting groove. By forming a limiting groove with the base body, the transformer assembly can directly and tightly fit with the limiting shell when placed, effectively restricting the degree of freedom of the transformer assembly. This provides a more reliable basis for the subsequent locking of the cover assembly, further ensuring the reliability of the overall transformer locking mechanism.

[0008] In one embodiment, limiting ribs are formed on opposite sides of the limiting shell, and these ribs abut against opposite sides of the transformer assembly. The limiting ribs provide precise radial positioning and rigid support, effectively restricting the transformer assembly's freedom of movement in the horizontal plane and preventing lateral displacement or rotation due to vibration during use. This point or line contact method constitutes a robust mechanical constraint, ensuring that the transformer is in a stable, preset working position before the housing assembly locks it in. This provides a foundation for accurate and smooth engagement of subsequent mating structures and spaces, thereby further improving the reliability and assembly accuracy of the entire locking mechanism.

[0009] In one embodiment, the limiting housing has notches on opposite sides, which mate with the coils of the transformer assembly. These notches provide dedicated space for the transformer coils, allowing the transformer assembly to be embedded into the limiting housing at a lower installation height. This design allows the limiting housing to be set at a higher height, providing better lateral restraint for the transformer assembly, effectively preventing horizontal displacement and improving the stability and reliability of the transformer assembly.

[0010] In one embodiment, the housing assembly includes a housing body and reinforcing ribs. The housing body covers the transformer assembly, and there are multiple reinforcing ribs, all disposed on the housing body. The multiple reinforcing ribs significantly enhance the overall structural rigidity and deformation resistance of the housing assembly. This allows the housing assembly to more evenly bear and transmit the reaction forces from the transformer assembly and the base assembly when locked together, effectively preventing the housing body from bending or twisting due to stress. Furthermore, the reinforcing ribs can be made of metal for heat dissipation.

[0011] In one embodiment, a limiting block is further included, which is disposed on the cover body. The cover body, the limiting block, and one of the reinforcing ribs enclose and form the mating space. By enclosing the mating space with the cover body, the limiting block, and the reinforcing ribs, the reliability of the mating space can be ensured, making the mating structure and the mating space more stable and reliable.

[0012] In one embodiment, the system further includes a mating part disposed on the housing body. The mating part has a first mating hole, and the base assembly has a second mating hole. It also includes a connector that mates with both the first and second mating holes. By matesing with the first and second mating holes respectively, the housing body and the base assembly can be connected together, allowing the housing body to be stably fixed and further improving the reliability and stability of the housing body's locking of the transformer assembly.

[0013] In one embodiment, the housing body includes a first limiting part, a second limiting part, and a third limiting part. The first limiting part is disposed on the transformer assembly, and the second and third limiting parts are both disposed on the first limiting part, with the second and third limiting parts located at opposite ends of the first limiting part. The two ends of the transformer assembly abut against the second and third limiting parts, respectively. Through the coordinated action of the first, second, and third limiting parts, constraints are simultaneously applied from three directions—the top and both ends—of the transformer assembly, forming a stable three-sided encircling limit. This multi-directional limiting structure effectively restricts the displacement and sway of the transformer assembly in the axial and vertical directions, ensuring a constant position of the transformer inside the housing, enhancing its vibration and impact resistance, and thus significantly improving the overall stability and reliability of the locking mechanism.

[0014] In one embodiment, the base assembly includes a base body, a mating structure, and a fixing structure. The transformer assembly is disposed on the base body, the mating structure is disposed on the base body and mates with the housing assembly, and the fixing structure is disposed on the base body. The fixing structure has an assembly groove and also includes a flow meter, which mates with the fixing structure and is located in the assembly groove. By having the flow meter mate with the fixing structure and be located in the assembly groove, the flow meter's degrees of freedom are effectively restricted, ensuring stable operation of the flow meter.

[0015] In one embodiment, the fixing structure includes a first fixing part, a second fixing part, and a third fixing part. The first fixing part is disposed on the base body, and the second and third fixing parts are both disposed on the base body and located inside the first fixing part. The third fixing part is disposed closer to the center of the first fixing part than the second fixing part. The second fixing part has a first mounting hole, and the flow meter has a first protrusion that mates with the first mounting hole. The third fixing part has a second mounting hole, and the flow meter has a second protrusion that mates with the second mounting hole. By having the first and second protrusions mate with the first and second mounting holes respectively, the flow meter's degrees of freedom in all directions are effectively restricted, improving the reliability of the flow meter assembly and enabling the flow meter to operate stably.

[0016] In one embodiment, a mating rib is formed on the wall of the assembly groove, and the mating rib abuts against the bottom of the flow meter. The mating rib provides additional rigid support points for the bottom of the flow meter. This design effectively restricts the flow meter's vertical degree of freedom, further enhancing the installation stability of the flow meter within the assembly groove and ensuring its long-term stable operating posture.

[0017] A coffee machine includes: the aforementioned transformer locking mechanism.

[0018] The second aspect of this application discloses a coffee machine in which the housing assembly of the transformer locking mechanism limits the transformer assembly and the housing assembly cooperates with the base assembly to achieve reliable and stable locking of the transformer assembly, improve the reliability of the transformer assembly on the base assembly, and enable the transformer assembly to remain stable during operation, thus having good practicality. Attached Figure Description

[0019] Figure 1 This is a first perspective view of the transformer locking mechanism;

[0020] Figure 2 This is a second perspective view of the transformer locking mechanism;

[0021] Figure 3 This is a first sectional view of the transformer locking mechanism;

[0022] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This is a second sectional view of the transformer locking mechanism;

[0024] Figure 6 for Figure 5 Enlarged view at point B in the middle;

[0025] Figure 7 This is the first exploded view of the transformer locking mechanism;

[0026] Figure 8 for Figure 7 Enlarged view at point C;

[0027] Figure 9 This is the second exploded view of the transformer locking mechanism;

[0028] Figure 10 A 3D view of the base assembly;

[0029] Figure 11 for Figure 10 Enlarged view at point D;

[0030] Figure 12 for Figure 10 Enlarged view at point E in the middle;

[0031] Figure 13 This is a three-dimensional view of the housing assembly;

[0032] Figure 14 A 3D view of the flow meter;

[0033] Figure 15 This is a 3D view of a transformer assembly.

[0034] The correspondence between the reference numerals and the component names is as follows:

[0035] 1. Base assembly, 11. Base body, 12. Mating structure, 13. Limiting shell, 131. Limiting rib, 14. Fixing structure, 141. First fixing part, 142. Second fixing part, 143. Third fixing part, 15. Mating rib, 101. Limiting groove, 102. Notch, 103. Assembly groove, 104. First assembly hole, 105. Second assembly hole, 106. Second mating hole;

[0036] 2. Transformer assembly;

[0037] 3. Cover assembly, 31. Cover body, 311. First limiting part, 312. Second limiting part, 313. Third limiting part, 32. Reinforcing rib, 33. Adaptor block, 34. Mating part, 301. Mating space, 302. First mating hole.

[0038] 4. Flow meter, 41. First protrusion, 42. Second protrusion. Detailed Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0041] Example 1

[0042] like Figure 1-15 As shown, this embodiment discloses a transformer locking mechanism, including: a base assembly 1; a transformer assembly 2 disposed on the base assembly 1; and a cover assembly 3 covering the transformer assembly 2, the cover assembly 3 cooperating with the base assembly 1, and the transformer assembly 2 located between the base assembly 1 and the cover assembly 3; one of the base assembly 1 and the cover assembly 3 is provided with a mating structure 12, and the other of the base assembly 1 and the cover assembly 3 is provided with a mating space 301, the mating structure 12 cooperating with the mating space 301.

[0043] The first aspect of this application discloses a transformer locking mechanism. Through the cooperation of the mating structure 12 and the mating space 301, the cover assembly 3 and the base assembly 1 are engaged to stably lock the transformer assembly 2. Specifically, during assembly, the transformer assembly 2 is simply placed on the base assembly 1, and then the cover assembly 3 is placed over the transformer assembly 2. The mating structure 12 in the base assembly 1 and the cover assembly 3 is then embedded in the mating space 301 to complete the fixation. The entire assembly method is simple and convenient, effectively reducing assembly time and operational complexity. The cooperation between the mating structure 12 and the mating space 301 ensures that the transformer assembly 2 does not suffer from locking failure during long-term use, significantly reducing the need for regular maintenance of the fixing structure 14 of the transformer assembly 2. This design eliminates the need for frequent screw checks and tightening, reducing the workload of maintenance personnel and saving on labor and parts replacement costs, thus significantly improving the economic efficiency of the coffee machine. Furthermore, the housing assembly 3, which covers the transformer assembly 2, can effectively limit the displacement of the transformer assembly 2 in multiple directions such as up and down and left and right. This all-round limiting effect of the transformer assembly 2 avoids the shaking or displacement of the transformer assembly 2 due to loosening when the coffee machine is working, ensures the connection stability of the transformer assembly 2 with the surrounding circuits and components, provides a reliable structural guarantee for the stable operation of the transformer assembly 2, and further improves the overall working stability of the coffee machine.

[0044] like Figure 1 and Figure 2As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the base assembly 1 is provided with a limiting groove 101, and the transformer assembly 2 is disposed on the base assembly 1 and located at the limiting groove 101. By positioning the transformer assembly 2 at the limiting groove 101, the limiting groove 101 can restrict the degree of freedom of the transformer assembly 2, ensuring that the transformer assembly 2 is always in a preset working position after installation, thus guaranteeing the stability of the transformer assembly 2's operation. During assembly, the operator only needs to place the transformer assembly 2 correspondingly at the limiting groove 101 to quickly complete the initial positioning, making the operation simple and convenient.

[0045] like Figure 10 and Figure 11 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the base assembly 1 includes a base body 11 and a limiting shell 13; the transformer assembly 2 is disposed on the base body 11; the limiting shell 13 is disposed on the base body 11; and the limiting shell 13 and the base body 11 enclose each other to form the limiting groove 101. By forming the limiting groove 101 with the base body 11, the transformer assembly 2 can directly and tightly fit with the limiting shell 13 when placed, effectively restricting the degree of freedom of the transformer assembly 2, providing a more reliable basis for the subsequent locking of the cover assembly 3, and further ensuring the reliability of the overall transformer locking mechanism.

[0046] like Figure 7-8 and Figure 10-11 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: limiting ribs 131 are formed on opposite sides of the limiting shell 13, and the limiting ribs 131 formed on opposite sides of the limiting shell 13 abut against opposite sides of the transformer assembly 2. The setting of the limiting ribs 131 provides precise radial positioning and rigid support, which can effectively limit the degree of freedom of movement of the transformer assembly 2 in the horizontal plane and prevent it from lateral displacement or rotation due to vibration during use. This point or line contact method constitutes a solid mechanical constraint, ensuring that the transformer is in a stable preset working position before the housing assembly 3 locks it, providing a foundation for the accurate and smooth engagement of the subsequent mating structure 12 and the mating space 301, thereby further improving the reliability and assembly accuracy of the entire locking mechanism.

[0047] like Figure 7-8 and Figure 10-11As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the limiting shell 13 has notches 102 on both opposite sides, and the notches 102 can cooperate with the coils of the transformer assembly 2. The notches 102 provide dedicated space for the transformer coils to accommodate and avoid them, allowing the transformer assembly 2 to be embedded in the limiting shell 13 at a lower installation height. This design allows the limiting shell 13 to be set at a higher height, providing a better lateral limiting effect for the transformer assembly 2, effectively preventing the transformer assembly 2 from shifting in the horizontal direction, and resulting in better stability and reliability of the transformer assembly 2.

[0048] like Figure 3-4 and Figure 13 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the housing assembly 3 includes a housing body 31 and reinforcing ribs 32. The housing body 31 covers the transformer assembly 2, and there are multiple reinforcing ribs 32, all of which are disposed on the housing body 31. The multiple reinforcing ribs 32 significantly enhance the overall structural rigidity and deformation resistance of the housing assembly 3. This allows the housing assembly 3 to more evenly bear and transmit the reaction forces from the transformer assembly 2 and the base assembly 1 when it is locked in place with the base assembly 1, effectively preventing the housing body 31 from bending or twisting due to stress. Furthermore, the reinforcing ribs 32 can also be made of metal for heat dissipation.

[0049] like Figure 3-4 and Figure 13 As shown, in addition to the features of the above embodiments, this embodiment further includes a limiting block 33, which is disposed on the cover body 31. The cover body 31, the limiting block 33, and one of the reinforcing ribs 32 enclose and form the mating space 301. By enclosing the mating space 301 with the cover body 31, the limiting block 33, and the reinforcing rib 32, the reliability of the mating space 301 can be ensured, making the mating structure 12 and the mating space 301 more stable and reliable.

[0050] like Figure 9 and Figure 13As shown, in addition to the features of the above embodiments, this embodiment further includes: a mating part 34, which is disposed on the housing body 31. The mating part 34 has a first mating hole 302, and the base assembly 1 has a second mating hole 106. It also includes a connector, which mates with the first mating hole 302 and the second mating hole 106 respectively. By matesing with the first mating hole 302 and the second mating hole 106 respectively, the housing body 31 and the base assembly 1 can be connected together, allowing the housing body 31 to be stably fixed, further improving the reliability and stability of the housing body 31 locking the transformer assembly 2.

[0051] like Figure 1-2 and Figure 13 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the housing body 31 includes a first limiting part 311, a second limiting part 312, and a third limiting part 313. The first limiting part 311 is disposed on the transformer assembly 2. The second limiting part 312 and the third limiting part 313 are both disposed on the first limiting part 311, and the second limiting part 312 and the third limiting part 313 are respectively located at both ends of the first limiting part 311. The two ends of the transformer assembly 2 abut against the second limiting part 312 and the third limiting part 313, respectively. Through the coordinated action of the first limiting part 311, the second limiting part 312, and the third limiting part 313, constraints are simultaneously applied from three directions—the top and both ends—of the transformer assembly 2, forming a stable three-sided encircling limit. This multi-directional limiting structure effectively restricts the displacement and sway of the transformer assembly 2 in the axial and vertical directions, ensuring that the transformer's position inside the casing remains constant, enhancing its resistance to vibration and impact, and thus significantly improving the overall stability and reliability of the locking mechanism.

[0052] like Figure 5-6 , Figure 9 and Figure 12 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the base assembly 1 includes a base body 11, a mating structure 12, and a fixing structure 14; the transformer assembly 2 is disposed on the base body 11; the mating structure 12 is disposed on the base body 11 and mates with the cover assembly 3; the fixing structure 14 is disposed on the base body 11; the fixing structure 14 is provided with an assembly groove 103; and it also includes a flow meter 4, which mates with the fixing structure 14 and is located at the assembly groove 103. By having the flow meter 4 mate with the fixing structure 14 and be located at the assembly groove 103, the degree of freedom of the flow meter 4 can be effectively restricted, ensuring that the flow meter 4 can work stably.

[0053] like Figure 5-6, Figure 9 and Figure 12 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the fixing structure 14 includes a first fixing part 141, a second fixing part 142, and a third fixing part 143. The first fixing part 141 is disposed on the base body 11. The second fixing part 142 and the third fixing part 143 are both disposed on the base body 11 and located inside the first fixing part 141. The third fixing part 143 is disposed closer to the middle of the first fixing part 141 than the second fixing part 142. The second fixing part 142 is provided with a first mounting hole 104. The flow meter 4 forms a first protrusion 41 that mates with the first mounting hole 104. The third fixing part 143 is provided with a second mounting hole 105. The flow meter 4 forms a second protrusion 42 that mates with the second mounting hole 105. By having the first protrusion 41 and the second protrusion 42 mate with the first mounting hole 104 and the second mounting hole 105 respectively, the freedom of the flow meter 4 in all directions is effectively restricted, improving the reliability of the flow meter 4 assembly and enabling the flow meter 4 to work stably.

[0054] like Figure 10 and Figure 11 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: a mating rib 15 is formed on the wall of the assembly groove 103, and the mating rib 15 abuts against the bottom of the flow meter 4. The mating rib 15 provides an additional rigid support point for the bottom of the flow meter 4. This design effectively restricts the vertical degree of freedom of the flow meter 4, further enhancing the installation stability of the flow meter 4 within the assembly groove 103 and ensuring its long-term stable operating posture.

[0055] Example 2

[0056] This embodiment discloses a coffee machine, including the aforementioned transformer locking mechanism.

[0057] The second aspect of this application discloses a coffee machine in which the housing assembly 3 of the transformer locking mechanism limits the transformer assembly 2 and the housing assembly 3 cooperates with the base assembly 1 to achieve reliable and stable locking of the transformer assembly 2, improve the reliability of the transformer assembly 2 on the base assembly 1, and enable the transformer assembly 2 to remain stable during operation, which is practical.

[0058] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A transformer locking mechanism, characterized in that, include: Base assembly (1); A transformer assembly (2) is disposed on the base assembly (1); A housing assembly (3) is mounted on the transformer assembly (2). The housing assembly (3) cooperates with the base assembly (1). The transformer assembly (2) is located between the base assembly (1) and the housing assembly (3). One of the base assembly (1) and the cover assembly (3) is provided with a mating structure (12), and the other of the base assembly (1) and the cover assembly (3) is provided with a mating space (301), and the mating structure (12) mates with the mating space (301).

2. The transformer locking mechanism according to claim 1, characterized in that, The base assembly (1) is provided with a limiting groove (101), and the transformer assembly (2) is disposed on the base assembly (1) and located at the limiting groove (101).

3. The transformer locking mechanism according to claim 2, characterized in that, The base assembly (1) includes a base body (11) and a limiting shell (13). The transformer assembly (2) is disposed on the base body (11), and the limiting shell (13) is disposed on the base body (11). The limiting shell (13) and the base body (11) enclose each other to form the limiting groove (101).

4. The transformer locking mechanism according to claim 3, characterized in that, Limiting ribs (131) are formed on opposite sides of the limiting shell (13), and the limiting ribs (131) formed on opposite sides of the limiting shell (13) abut against opposite sides of the transformer assembly (2). And / or the limiting shell (13) has notches (102) on both sides opposite to each other, the notches (102) being able to cooperate with the coil of the transformer assembly (2).

5. The transformer locking mechanism according to claim 1, characterized in that, The housing assembly (3) includes a housing body (31) and reinforcing ribs (32). The housing body (31) covers the transformer assembly (2). There are multiple reinforcing ribs (32), and all of the multiple reinforcing ribs (32) are arranged on the housing body (31).

6. The transformer locking mechanism according to claim 5, characterized in that, It also includes a limiting block (33), which is disposed on the cover body (31). The cover body (31), the limiting block (33) and one of the reinforcing ribs (32) enclose the mating space (301). And / or also includes a mating part (34) disposed on the housing body (31), the mating part (34) having a first mating hole (302), the base assembly (1) having a second mating hole (106), and also includes a connector that mates with the first mating hole (302) and the second mating hole (106) respectively.

7. The transformer locking mechanism according to claim 5, characterized in that, The housing body (31) includes a first limiting part (311), a second limiting part (312), and a third limiting part (313). The first limiting part (311) is disposed on the transformer assembly (2). The second limiting part (312) and the third limiting part (313) are both disposed on the first limiting part (311), and the second limiting part (312) and the third limiting part (313) are respectively located at both ends of the first limiting part (311). Both ends of the transformer assembly (2) abut against the second limiting part (312) and the third limiting part (313) respectively.

8. The transformer locking mechanism according to claim 1, characterized in that, The base assembly (1) includes a base body (11), a mating structure (12), and a fixing structure (14). The transformer assembly (2) is disposed on the base body (11). The mating structure (12) is disposed on the base body (11) and is mated with the cover assembly (3). The fixing structure (14) is disposed on the base body (11) and has an assembly groove (103). It also includes a flow meter (4), which is mated with the fixing structure (14) and is located in the assembly groove (103).

9. The transformer locking mechanism according to claim 8, characterized in that, The fixing structure (14) includes a first fixing part (141), a second fixing part (142), and a third fixing part (143). The first fixing part (141) is disposed on the base body (11). The second fixing part (142) and the third fixing part (143) are both disposed on the base body (11) and located inside the first fixing part (141). The third fixing part (143) is disposed closer to the middle of the first fixing part (141) than the second fixing part (142). The second fixing part (142) is provided with a first mounting hole (104). A first protrusion (41) is formed on the flow meter (4) to cooperate with the first mounting hole (104). The third fixing part (143) is provided with a second mounting hole (105). A second protrusion (42) is formed on the flow meter (4) to cooperate with the second mounting hole (105). And / or forming a mating rib (15) on the wall of the assembly groove (103), the mating rib (15) abutting against the bottom of the flow meter (4).

10. A coffee machine, characterized in that, include: The transformer locking mechanism as described in any one of claims 1-9.

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