Manually-adjusted timing device of steam rod of coffee machine and steam rod of manually-adjusted timing device

Abstract

The utility model discloses a manually adjusted coffee machine steam rod timing device and a steam rod thereof, which comprise a steam inlet cover which is provided with a steam inlet and is communicated with a steam source steam path of a coffee machine, and a timing assembly which comprises a timing gear, an elastic element and a speed limiting elastic ring, and the elastic element and the speed limiting elastic ring act on the timing gear. The timing gear can regularly restore to the original position after rotating by a certain angle in the circumferential direction, a steam outlet is formed in the timing gear, and the elastic element, the speed limiting elastic ring and a part of the timing gear are covered with the steam inlet cover in a sealed mode. The steam outlet rod is connected with the timing assembly and is provided with a hollow cavity, an arc-shaped steam outlet through hole is formed in a cross section in the hollow cavity, close to the upper end part, of the steam outlet rod, the steam outlet through hole is always communicated with the steam outlet in a timing state, and the timing function of manually adjusting the steam rod can be effectively realized through the timing assembly; a default starting position exists during assembly, steam injection is stable, coffee extraction and man-machine interaction are improved, and meanwhile cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of coffee machines, and in particular to a timing device for a manually adjustable coffee machine steam wand and the steam wand thereof. Background Technology

[0002] As people's living standards improve, there are more and more coffee shops and coffee lovers. Whether it is a fully automatic or semi-automatic coffee machine, a steam wand is used to heat other drinks, especially to froth milk and make latte art, so as to obtain a better drinking experience.

[0003] Currently, the steam wand device equipped in coffee machines on the market generally consists of a steam wand, a mounting bracket, and a steam nozzle assembly, allowing users to adjust the angle of the steam wand according to the requirements of the usage environment, making the process convenient.

[0004] There are three common ways to turn on steam in the market: rotary switch, lever switch, and solenoid valve control in fully automatic coffee machines. Among them, rotary switches are less accurate and more prone to failure. Improper operation can easily cause the steam to fail to turn off. Lever-type steam wrenches are most commonly used in semi-automatic coffee machines. Fully automatic coffee machines mainly use solenoid valve control, but solenoid valve control is more expensive. Utility Model Content

[0005] The main technical problem solved by this utility model is to provide a timing device for a manually adjustable steam wand of a coffee machine, which optimizes the shortcomings of the mechanical device of the steam wand of a coffee machine in the prior art. The timing component can effectively realize the function of manually adjusting the timing of the steam wand of a coffee machine. It has a default starting position during assembly, stable steam injection, added timing function, and the steam output time can be preset and manually adjusted, making it easy to operate.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a steam timing device for a manually adjustable steam wand of a coffee machine, used to control the steam output duration of the steam wand, comprising:

[0007] The steam inlet cover has a steam inlet that is connected to the steam source circuit of the coffee machine to allow steam to enter the steam rod.

[0008] The timing component includes a timing gear, an elastic element, and a speed limiting spring ring. The elastic element and the speed limiting spring ring act on the timing gear so that the timing gear can return to its original position after rotating a certain angle in the circumferential direction. The timing gear is provided with a steam outlet. The elastic element, the speed limiting spring ring, and a part of the timing gear are sealed and covered by the steam inlet cover.

[0009] The steam outlet rod, connected to the timing component, has a hollow cavity. An arc-shaped steam outlet hole is formed in a cross-section of the hollow cavity near the upper end of the steam outlet rod. The steam outlet hole is always connected to the steam outlet of the timing gear in the timing state of the timing component.

[0010] In one embodiment, the timing gear includes a base, teeth, and an extension disposed on the teeth. One end of the elastic element is confined within the extension on the timing gear, and the other end is provided with a first limiting part, which cooperates with a second limiting part on the inner sidewall of the steam inlet cover to position the other end of the elastic element.

[0011] In one embodiment, a first steam passage hole and a second steam passage hole are provided on the timing gear. The second steam passage hole is provided on the upper surface of the base and is connected to the steam outlet. When the steam inlet cover is sealed on the base, the steam in the steam inlet cover is transmitted to the steam outlet and fed into the steam rod after passing through the first steam passage hole and the second steam passage hole.

[0012] In one embodiment, a sealing ring is provided inside the steam outlet, and the diameter of the central steam outlet hole of the sealing ring is less than or equal to the width of the steam outlet through hole.

[0013] In one embodiment, the sealing ring is interference-fitted into the steam outlet, and the steam outlet hole on the steam outlet rod has a semi-circular structure.

[0014] In one embodiment, the toothed portion includes multiple teeth, and the speed-limiting spring ring is provided with multiple speed-limiting steps that contact and engage with the teeth to limit the rebound and reset speed of the elastic element.

[0015] In one embodiment, the timing component further includes a positioning element. The circumferential sidewall of the timing gear is provided with a positioning hole. The outer surface of the upper end of the steam outlet rod has a clearance through groove in the circumferential direction corresponding to the position of the positioning hole. One end of the positioning element is inserted into the positioning hole, and the other end extends out of the clearance through groove and can move in the clearance through groove.

[0016] In one embodiment, a steering sleeve is fitted onto the steam outlet rod, and the steering sleeve has an insertion hole corresponding to the position of the positioning element. The positioning element is inserted into the insertion hole, and a rotating handle is fixedly fitted onto the steering sleeve.

[0017] In one embodiment, multiple scale markings are evenly distributed on the outer wall of the steam rod adjusting head, and a positioning mark button corresponding to the position of the positioning element is provided on the rotating handle. The timing time for steam conduction is determined by turning the rotating handle until the positioning mark button is aligned with the different scale marking positions.

[0018] On the other hand, the present invention also provides a coffee machine steam wand, including a timing device for a manually adjustable coffee machine steam wand.

[0019] The beneficial effects of this utility model are as follows: By adding a timing component to the steam wand of the coffee machine, the timing stability and uniformity are ensured by the action of elastic elements and speed-limiting springs on the timing gear. A steam outlet is provided on the timing gear, and a corresponding arc-shaped steam outlet hole is provided on the steam outlet rod, which can adapt to the movement of the steam outlet of the timing gear. This ensures that the steam outlet hole is always connected to the steam outlet of the timing gear during the timing state of the timing component, thus effectively realizing the function of manually adjusting the steam timing of the coffee machine's steam wand. This steam wand allows for both preset and manual adjustment of the steam output time, adding a timing function. The preset and manual adjustment of the steam output time provides strong stability, increases the enjoyment of coffee making, improves and optimizes the ergonomics of the interaction between the user and the coffee machine's steam wand, and also reduces costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0021] Figure 1 This is a schematic diagram of the present invention assembled onto a steam rod;

[0022] Figure 2 This is an exploded view of the present invention assembled onto a steam rod;

[0023] Figure 3 This is a cross-sectional view of the present invention assembled onto a steam rod;

[0024] Figure 4 This is a schematic diagram of the structural assembly of the timing component in this utility model;

[0025] Figure 5 This is an assembly diagram of the timing component in this utility model from another perspective;

[0026] Figure 6 This is an exploded view of the timing component in this utility model;

[0027] Figure 7 This is a schematic diagram of the first group of structural components in this utility model;

[0028] Figure 8 This is a schematic diagram of the second group of structures in this utility model;

[0029] Figure 9 This is a schematic diagram of the third structural component in this utility model;

[0030] Figure 10 This is a schematic diagram of the steam outlet rod in this utility model. Detailed Implementation

[0031] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Please see Figure 1-3 The present invention is a timing device for a manually adjustable steam wand of a coffee machine, comprising: a steam inlet cover 2 disposed inside the steam wand adjustment head 1, a timing component, and a steam outlet wand 3 threadedly connected to the lower end of the steam wand adjustment head 1. The timing component includes a speed limiting spring ring 4, a timing gear 5, and an elastic element 6. The elastic element 6 and the speed limiting spring ring 4 act on the timing gear 5 so that the timing gear 5 can return to its original position after rotating a certain angle in the circumferential direction at a set time. The elastic element 6, the speed limiting spring ring 4, and a portion of the timing gear 5 are sealed and covered by the steam inlet cover 2. The speed limiting spring ring 4 is interference-fitted inside the steam inlet cover 2 to ensure the uniform rotation of the timing gear and the stability of the steam output.

[0033] In the embodiments of this application, please refer to Figure 4-6 The timing gear 5 includes a base 51, a toothed portion 52, and an extension 53 disposed on the toothed portion 52. Preferably, the elastic element 6 is a coil spring, one end of which is confined within the extension 53 on the timing gear 5. Specifically, a limiting groove 531 is provided in the extension 53 on the timing gear 5, one end of the elastic element 6 is confined within the limiting groove 531, and the other end of the elastic element 6 is provided with a first limiting part 61, which cooperates with a second limiting part 21 on the inner sidewall of the steam inlet cover 2 to position the other end of the elastic element 6. Specifically, in this embodiment, as shown... Figure 8 As shown, the first limiting part 61 is a limiting recess provided on the other end of the elastic element 6, and the second limiting part 21 is a limiting boss on the inner wall of the steam inlet cover 2. During installation, the limiting recess and the boss cooperate to lock and limit the other end of the elastic element 6. It should be noted that, according to the usage requirements, the first limiting part 61 can be a limiting boss provided on the other end of the elastic element 6, and the second limiting part 21 can be a limiting recess provided on the inner wall of the steam inlet cover 2 that cooperates with the limiting boss. The elastic element 6 is the power source for the timing function of the steam rod, so that the timing gear 5 can return to its original position after rotating a certain angle.

[0034] In the embodiments of this application, further reference is made to... Figure 4-5 As shown, the speed limiting spring ring 4 has several speed limiting step portions 41, and the teeth 52 of the timing gear 5 have multiple teeth. The speed limiting step portions 41 have a certain elasticity and contact with several teeth to keep the rebound of the elastic element 6 at a uniform speed. The elastic element 6 is the power source for the timing function of the steam rod. The speed limiting spring ring 4 ensures the uniformity of timing and the controllability of time. When the elastic element 6 returns to its original position at a uniform speed, the teeth contact the speed limiting step portions 41 one by one and move slowly along the inclined surface of the speed limiting step portions 41. This ensures that the timing gear 5 has a certain uniform speed time to complete contact with the speed limiting step portions 41 after rotating one tooth, thereby controlling the reset time of the timing gear 5 after rotating a certain angle, and thus controlling the steam output time.

[0035] In this embodiment, the timing gear 5 has 10 teeth, and the speed limiting step 41 has 3. Each speed limiting step 41 of the speed limiting spring ring 4 is located between two adjacent teeth and makes frictional contact with the adjacent teeth to control the timing gear 5 to recover at a uniform speed. In this embodiment, the steam outlet hole 31 is designed as an arc-shaped steam outlet hole corresponding to a 180° circumference. The clearance through groove 32 is also an arc-shaped through groove with a half circumference of 180°. That is, the maximum timing stroke is half a circle. The design of the speed limiting spring ring 4 makes it take 1 minute for the timing gear 5 to rotate half a circle. That is, the maximum rotation angle of the timing gear 7 is half a circle, and the uniform recovery time is 1 minute. This design takes into account that the general steam usage time does not exceed 1 minute, which meets the maximum steam duration requirement.

[0036] It should be noted that in other embodiments, the number of teeth on the timing gear 5 is not necessarily 10, but can be N, that is, the timing gear 5 rotates through N teeth in one revolution, such as 4, 6, 10 or 10, etc. In this embodiment, it has 10 teeth. The maximum timing stroke is half a revolution. The time taken for the timing gear 5 to rotate one tooth is 2T / N, where T is the preset maximum timing time and N is the number of teeth. In other embodiments, the maximum set rotation stroke can be 270°, and the time taken for the timing gear 5 to rotate one tooth is 4T / 3N. The number of speed limiting step parts 41 is not limited to 3, and can be designed according to the actual speed control needs, or it can be 1, 2 or more. The rotation speed of the timing gear 5 can be obtained by designing the restoring force of the elastic element 6 and the resistance of the uniform speed spring according to the timing duration needs.

[0037] In the embodiments of this application, the steam outlet rod 3 is connected to the timing component and has a hollow cavity. An arc-shaped steam outlet hole 31 is formed in a cross-section of the hollow cavity near the upper end of the steam outlet rod 3. The steam outlet hole 31 is always connected to the steam outlet 54 of the timing gear 5 in the timing state of the timing component. Specifically, the top surface of the steam inlet cover 2 is provided with a steam inlet 22, and the bottom surface of the timing gear 5 is provided with a steam outlet 54. The timing gear 5 is also provided with a first steam passage hole 55 and a second steam passage hole (not shown in the figure). The second steam passage hole is provided on the upper surface of the base 51 and is connected to the steam outlet 54. When the steam inlet cover 2 is sealed on the base 51, the steam in the steam inlet cover 2 is transmitted to the steam outlet 54 and sent into the steam rod after passing through the first steam passage hole 55 and the second steam passage hole.

[0038] Furthermore, the diameter of the steam inlet 22 on the steam inlet cover 2 is larger than the diameter of the steam outlet 54. Since the sealing space inside the steam inlet cover 2 remains unchanged, the amount of steam injected by the steam rod of the coffee machine remains stable when the steam rod is working, which provides the stability of steam pressure and solves the problems of steam injection and steam instability of conventional steam rods.

[0039] In the embodiments of this application, the timing component further includes a positioning element 7. The circumferential sidewall of the timing gear 5 is provided with a positioning hole 8. The positioning element 7 can be a positioning pin or a positioning post. The outer surface of the upper end of the steam outlet rod 3 has a clearance through groove 32 in the circumferential direction corresponding to the position of the positioning hole 8. One end of the positioning element 7 is inserted into the positioning hole 8, and the other end extends out of the clearance through groove 32 and can move in the clearance through groove 32. Please refer to [link to relevant documentation]. Figure 7-10 The structure of the through groove 32 is an arc-shaped structure that matches the steam outlet hole 31. The steam outlet rod 3 has a hollow cavity, which forms a channel for steam to pass through. In this embodiment, the steam outlet hole 31 is opened circumferentially along the cross-section of the steam outlet rod 3 and is a semi-circular structure. The corresponding maximum timing is 1 minute. Under the premise of ensuring strength, the maximum arc of the steam outlet hole 31 does not exceed 3 / 4 of the circumference, 270°.

[0040] In this embodiment, a steering sleeve 9 is fitted onto the steam outlet rod 3. The insertion hole on the steering sleeve 9 is aligned with the position of the clearance through groove 32, and their sizes are the same. A rotating handle 10 is fixedly fitted onto the steering sleeve 9. In this embodiment, the rotating handle 10 is made of silicone. The assembled timing component is rotated clockwise and screwed onto the steam outlet rod 3, ensuring that the positioning hole 8 on the side of the timing gear 5 is aligned with the right side of the elongated clearance through groove 32 at the upper end of the steam outlet rod 3. The steering sleeve 9 is fitted onto the steam outlet rod 3 to align with the position of the positioning hole 8, and the positioning element 7 is inserted into the positioning hole 8 of the timing gear 5. From the inside to the bottom, the rotating handle 10 is fitted onto the steering sleeve 9. Multiple sets of scale marks 11 are evenly distributed on the outer wall of the steam rod adjusting head 1. The rotating handle 10 is equipped with a positioning mark button 12 corresponding to the position of the positioning element 7. The rotation of the timing gear 5 is provided by manually rotating the outer ring rotating handle 10 clockwise. Since the insertion hole of the steering sleeve 9 also has a controllable angle of 180 degrees, the rotation angle of the positioning rod driven by the rotating handle 10 is also 180 degrees. In this embodiment, the steam rod adjusting head 1 is equipped with three scale marks 11, and the three positions correspond to the steam injection time of 24S / 36S / 60S respectively. By adjusting the positioning mark button 12 to align with the position of different scale marks 11, the steam injection time can be preset and manually adjusted. Multiple scale marks 11 can also be set according to the usage requirements. For example, when the rotating handle 10 is to the nearest scale mark 11, it means that steam is injected for 24 seconds, and so on according to the setting.

[0041] Specifically, a sealing ring 13 is provided inside the steam outlet 54. The sealing ring 13 is interference-fitted into the steam outlet 54 below the base 51 of the timing gear 5, further ensuring the pressure stability of the steam. The diameter of the central steam outlet hole of the sealing ring 13 is less than or equal to the width of the steam outlet through hole 31 opened on the circumference of the steam outlet rod 3. In some embodiments, the steam pressure and flow rate can be adjusted by changing the size of the sealing ring 13. The steam outlet 54 below the timing gear 5 is the outlet for injected steam and is aligned and connected to the steam outlet through hole 31. This steam outlet 54 rotates clockwise to engage with the steam outlet through hole 31 on the steam outlet rod 3. Steam passes through the steam channel inside the steam outlet rod 3 and then... Figure 10 The steam outlet 54 is shown to be ejected from the lower end of the steam outlet 3. When rotated counterclockwise to the bottom, it is not connected to the steam outlet hole 31. The steel plate inside the steam outlet 3 is blocked, preventing the steam from being ejected and thus pausing the operation of the steam outlet. Based on this principle, the steam outlet 54 with a timer device can effectively realize the timer function of the manually adjustable steam outlet of the coffee machine and maintain the stability of the steam pressure.

[0042] Finally, this application also provides a coffee machine steam rod with the aforementioned steam timing device. This steam rod, by adding a timing component, uses an elastic element and a speed-limiting spring to act on the timing gear, ensuring the stability and uniformity of timing. A steam outlet is provided on the timing gear, and a corresponding arc-shaped steam outlet hole is provided on the steam rod, adaptable to the movement of the steam outlet of the timing gear. This ensures that the steam outlet hole is always connected to the steam outlet of the timing gear during the timing state of the timing component, effectively realizing the steam timing function of the coffee machine steam rod. This steam rod allows for preset and manual adjustment of steam output time, adding a timing function, strong stability, increasing the enjoyment of coffee making, improving customer experience, and enhancing the human-machine interaction between the user and the coffee machine steam rod. Simultaneously, it reduces the cost of using a solenoid valve to control steam.

[0043] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A manually adjustable timing device for a steam wand of a coffee machine, for controlling the length of time during which steam is emitted from the steam wand, characterised in that The steam cover has a steam inlet communicating with a steam source steam passage of the coffee machine for steam to enter the steam rod; The timing assembly includes a timing gear, an elastic element and a speed limiting spring ring, the elastic element and the speed limiting spring ring act on the timing gear to enable the timing gear to return to the original position after rotating a certain angle in the circumferential direction, the timing gear is provided with a steam outlet, and a part of the elastic element, the speed limiting spring ring and the timing gear is sealed by the steam cover; The steam rod connected with the timing assembly has a hollow cavity, and a circular arc shaped steam passage hole is formed in the hollow cavity near the upper end of the steam rod in a cross section, and the steam passage hole is always in communication with the steam outlet of the timing gear in the timing state of the timing assembly. The timing gear includes a base, a tooth part and an extension part provided on the tooth part, one end of the elastic element is limited in the extension part on the timing gear, the other end is provided with a first limiting part, and the other end of the elastic element is positioned in cooperation with a second limiting part on the inner wall of the steam cover.

2. The timing device for a manually adjusted steam wand of a coffee machine according to claim 1, characterized in that, The timing gear is provided with a first steam passage hole and a second steam passage hole, the second steam passage hole is provided on the upper surface of the base and is in communication with the steam outlet, when the steam cover is sealed on the base, the steam in the steam cover is transmitted to the steam outlet through the first steam passage hole and the second steam passage hole and then enters the steam rod.

3. A timing device for a manually adjusted steam wand of an espresso machine according to claim 2, characterized in that, The steam outlet is provided with a sealing ring, and the diameter of the center steam passage hole of the sealing ring is less than or equal to the width of the steam passage hole.

4. A timing device for a manually adjusted steam wand of an espresso machine according to claim 3, characterized in that, The sealing ring is interference fitted in the steam outlet, and the steam passage hole on the steam rod is a semicircular structure.

5. A timing device for a manually adjusted steam wand of an espresso machine according to claim 4, characterized in that, The tooth part includes a plurality of teeth, and the speed limiting spring ring is provided with a plurality of speed limiting step parts in contact with the teeth to limit the rebound reset speed of the elastic element.

6. The manually adjusted timing device for a steam wand of a coffee machine according to claim 2, wherein, The timing assembly further includes a positioning element, the circumferential side wall of the timing gear is provided with a positioning hole, the outer surface of the rod body of the upper end of the steam rod has a let-through slot corresponding in position to the positioning hole, one end of the positioning element is inserted into the positioning hole, the other end extends out of the let-through slot and can move in the let-through slot.

7. The manually adjusted timing device for a steam wand of a coffee machine according to claim 1, characterized in that, A steering sleeve is sleeved on the steam rod, the steering sleeve is provided with an insertion hole corresponding in position to the positioning element, the positioning element is inserted into the insertion hole, and a rotating handle is fixedly sleeved on the steering sleeve.

8. A timing device for a manually adjusted steam wand of an espresso machine according to claim 7, characterized in that, A plurality of scale marks are arranged at equal intervals on the outer wall of the steam rod adjusting head, a positioning mark button corresponding in position to the positioning element is arranged on the rotating handle, the rotating handle is screwed to the positioning mark button, different scale marks are aligned to determine the timing time of steam conduction.

9. A timing device for a manually adjusted steam wand of an espresso machine according to claim 8, characterized in that, The timing device of the manually adjusted coffee machine steam rod includes the timing device of the manually adjusted coffee machine steam rod according to any one of claims 1-9.

10. A steam wand for a coffee machine, characterized in that, ​

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