A coupler assembly for a food processor

Abstract

The utility model relates to a kind of coupler assemblies for food processor, including the male end coupler with 7 or 8 pins, female end coupler is equipped with the pinhole matched with pin, first pin and second pin are close to the two long sides of coupler assembly setting, third pin, fourth pin, fifth pin and sixth pin are respectively located on first circle and second circle, seventh pin is located in the area enclosed by first pin, second pin, third pin and fourth pin.The technical scheme of the utility model first pin, second pin, third pin, fourth pin, fifth pin and sixth pin meet the minimum creepage distance between two adjacent pins specified in new national standard, ensuring electrical safety;The distance between fifth pin and fourth pin or third pin and sixth pin is relatively long, seventh pin is arranged in the blank area between the two pairs of pins, using the blank area between the two far apart pins, the pin arrangement is compact enough, and the coupler assembly has small outer dimension.

Description

Technical Field

[0001] This utility model relates to the field of food processing machine technology, and in particular to a coupler assembly for a food processing machine. Background Technology

[0002] Currently, household appliances and food processing machines include a main unit and a cup body, as well as an upper coupler installed on the machine head and a lower coupler installed on the main body base. One of the upper coupler and the lower coupler is a male coupler, and the other is a female coupler. The electrical connection between the main unit and the cup body is achieved through the cooperation of pins and sockets.

[0003] To meet the increasing number of functions, the number of pins in coupler assemblies is increasing. For example, application number CN202421129960.3, entitled "A Multi-Pin Coupler," discloses that the coupling upper socket has two sets of parallel pin groups, one set with three high-voltage pins and the other with four low-voltage pins. Application number CN200720055220.X, entitled "Food Processor with External Low-Voltage Controller," discloses that the low-voltage coupler socket consists of 6-12 pins, and the corresponding low-voltage coupler plug consists of 6-12 sockets, arranged in two rows. Other existing technologies arrange more than seven pins in a row, in a straight line or with an arc-shaped tail, among other arrangements.

[0004] The technical problems with the above-mentioned solutions are as follows: When the added functionality of the coupler assembly means that six pins are insufficient, the number of pins is increased. Existing technologies employ single-row or double-row array arrangements. In a single-row arrangement, the distance between the two furthest pins is very long, resulting in a large overall size of the coupler assembly. In a double-row array arrangement, the distance between the end pin of the first row and the beginning pin of the second row is also very long, and no further pins can be placed in the blank space between these two pins because the distance between any such pins and other pins in the first and second rows would not meet the electrical safety requirements for adjacent pins as stipulated by national standards. Therefore, single-row or double-row array arrangements of pins in the coupler assembly waste the blank space between the furthest pins, making the pin arrangement less compact and consequently resulting in a larger overall size of the coupler assembly. Utility Model Content

[0005] The purpose of this utility model is to provide a coupler assembly for a food processing machine to solve the technical problem that when the coupler assembly has more functions and six pins are not enough, the arrangement of pins in a single or double row array leads to the waste of the blank area between two far pins, making the arrangement of the pins not compact enough, and thus making the external size of the coupler assembly large.

[0006] To solve the above-mentioned technical problems, this utility model provides a coupler assembly for a food processing machine, comprising:

[0007] Male coupler with 7 or 8 pins;

[0008] The female coupler is provided with a socket that mates with the pin;

[0009] The electrical safety circle pitch, the center-to-center distance between any two pins shall not be less than the electrical safety circle pitch;

[0010] The first pin is positioned near the first long side of the coupler assembly;

[0011] The second pin is located near the second long side of the coupler assembly, and the line connecting the core of the second pin and the core of the first pin extends along the short side of the coupler assembly.

[0012] The first circle and the second circle are tangent to each other, with the center of the first pin and the center of the second pin respectively, and the radius of the electrical safety circle distance respectively.

[0013] The third pin and the fourth pin are both located on the first short side of the coupler assembly. The center of the third pin is located on the first circle, and the center of the fourth pin is located on the second circle.

[0014] The fifth and sixth pins are both located on the second short side of the coupler assembly, with the center of the fifth pin located on the first circle and the center of the sixth pin located on the second circle.

[0015] The seventh pin is located within the area enclosed by the first, second, third, and fourth pins.

[0016] Preferably, the line connecting the first and third insert needle cores is parallel to the line connecting the second and fourth insert needle cores.

[0017] Preferably, the seventh pin core is located at the intersection of the line connecting the first and fourth pin cores and the line connecting the second and third pin cores.

[0018] Preferably, the first, third, and fifth needle cores are located on a first straight line, and the second, fourth, and sixth needle cores are located on a second straight line, with the first and second straight lines being parallel.

[0019] Preferably, the eighth pin core is located at the intersection of the line connecting the first pin core and the sixth pin core and the line connecting the second pin core and the fifth pin core.

[0020] This utility model also provides a coupler assembly for a food processing machine, comprising:

[0021] Male coupler with 7 or 8 pins;

[0022] The female coupler is provided with a socket that mates with the pin;

[0023] The electrical safety circle pitch, the center-to-center distance between any two pins shall not be less than the electrical safety circle pitch;

[0024] The first pin is positioned near the first long side of the coupler assembly;

[0025] The second pin is located near the second long side of the coupler assembly, and the line connecting the core of the second pin and the core of the first pin extends along the short side of the coupler assembly.

[0026] The first circle and the second circle are respectively centered on the center of the first pin and the center of the second pin, and respectively have an electrical safety circle distance as their radius. The first circle and the second circle form a first gap.

[0027] The third pin and the fourth pin are both located on the first short side of the coupler assembly. The center of the third pin is located on the first circle or outside the circle adjacent to the first circle, and the center of the fourth pin is located on the second circle or outside the circle adjacent to the second circle.

[0028] The fifth and sixth pins are both located on the second short side of the coupler assembly. The center of the fifth pin is located on or near the outside of the first circle, and the center of the sixth pin is located on or near the outside of the second circle.

[0029] The seventh pin is located within the area enclosed by the first, second, third, and fourth pins.

[0030] Preferably, the line connecting the first and third insert needle cores is parallel to the line connecting the second and fourth insert needle cores, and the seventh insert needle core is located at the intersection of the line connecting the first and fourth insert needle cores and the line connecting the second and third insert needle cores.

[0031] Preferably, the first, third, and fifth needle cores are located on a first straight line, and the second, fourth, and sixth needle cores are located on a second straight line, with the first and second straight lines being parallel.

[0032] This utility model also provides a coupler assembly for a food processing machine, comprising:

[0033] Male coupler with 7 pins;

[0034] The female coupler is provided with a socket that mates with the pin;

[0035] The electrical safety circle pitch, the center-to-center distance between any two pins shall not be less than the electrical safety circle pitch;

[0036] The first pin is located in the central region of the coupler assembly;

[0037] The second pin and the third pin are located on the first short side and the second short side of the coupler assembly, respectively. The center of the second pin and the center of the third pin are both located on the first circle, with the center of the first pin as the center and the electrical safety circle distance as the radius.

[0038] The fourth and fifth pins are located at the two intersections of the first and second circles, respectively. The second circle has the second pin center as its center and the electrical safety circle distance as its radius.

[0039] The sixth and seventh pins are located at the two intersections of the first and third circles, respectively. The third circle has the center of the third pin as its center and the electrical safety circle distance as its radius.

[0040] Preferably, the first needle core, the second needle core, and the third needle core are located on the same straight line.

[0041] This utility model also provides a coupler assembly for a food processing machine, comprising:

[0042] Male coupler with 7 pins;

[0043] The female coupler is provided with a socket that mates with the pin;

[0044] The electrical safety circle pitch, the center-to-center distance between any two pins shall not be less than the electrical safety circle pitch;

[0045] The first pin is located in the central region of the coupler assembly;

[0046] The second pin and the third pin are located on the first short side and the second short side of the coupler assembly, respectively. The center of the second pin and the center of the third pin are both located on the first circle, with the center of the first pin as the center and the electrical safety circle distance as the radius.

[0047] The fourth and fifth pins are located outside the circles at two adjacent intersections of the first and second circles, respectively. The second circle has the center of the second pin as its center and the electrical safety circle distance as its radius.

[0048] The sixth and seventh pins are located outside the circles at two adjacent intersections of the first and third circles, respectively. The third circle has the center of the third pin as its center and the electrical safety circle distance as its radius.

[0049] Preferably, the first needle core, the second needle core, and the third needle core are located on the same straight line.

[0050] This utility model also provides a coupler assembly for a food processing machine, comprising:

[0051] Male coupler with 7 pins;

[0052] The female coupler is provided with a socket that mates with the pin;

[0053] The electrical safety circle pitch, the center-to-center distance between any two pins shall not be less than the electrical safety circle pitch;

[0054] The first pin is located in the central region of the coupler assembly;

[0055] The second pin and the third pin are located on the first short side and the second short side of the coupler assembly, respectively. At least one of the pin centers is outside the circle adjacent to the first circle, and the other is on the first circle or outside the circle adjacent to the first circle. The first circle has the first pin center as its center and the electrical safety circle pitch as its radius.

[0056] The fourth and fifth pins are located at two intersections of the first and second circles, respectively, or the fourth and fifth pins are located outside the circles at two adjacent intersections of the first and second circles, respectively. The second circle has the second pin center as its center and the electrical safety circle distance as its radius.

[0057] The sixth and seventh pins are located at two intersections of the first and third circles, respectively, or at the outer edges of the circles at two adjacent intersections of the first and third circles, respectively. The third circle has the center of the third pin as its center and the electrical safety circle distance as its radius.

[0058] Preferably, the first needle core, the second needle core, and the third needle core are located on the same straight line.

[0059] The beneficial effects of this utility model are:

[0060] 1. The coupler assembly for a food processing machine provided by this utility model is determined by drawing circles, with the first circle and the second circle being tangent to each other, and the center and circumference of the first circle and the second circle being determined respectively. Since the first circle and the second circle are both drawn with the electrical safety circle distance as the radius, it can ensure that two adjacent pins in the first or third row from top to bottom are on the same circle's center and circumference. Moreover, the distance between two adjacent pins in the first row and the third row is much greater than the electrical safety circle distance, so that the distance between two adjacent pins of the first, second, third, fourth, fifth, and sixth pins is not less than the electrical safety circle distance, thereby ensuring the electrical safety of the coupler assembly. Secondly, the distance between the fifth pin on the first circumference and the fourth pin on the second circumference, or the third pin on the first circumference and the sixth pin on the second circumference, is relatively long. A seventh pin is arranged in the blank area between these two pairs of pins. This seventh pin is spatially separated from the fifth and fourth pins, and also from the third and sixth pins, as well as the first and fourth pins. The second and third pins, being the next two furthest pins, utilize the blank area between these two furthest or next furthest pins. Since each pin is located on the circumference and center of the first or second circle, the overall pin arrangement is sufficiently compact, resulting in a sufficiently small external dimension of the coupler assembly. Furthermore, the distances between the seventh pin and the adjacent first, second, third, and fourth pins meet the electrical safety pitch requirements to ensure the electrical safety of the coupler assembly. Furthermore, existing technologies, using a double-row array arrangement, result in wasted corner space in one row when there are odd-numbered pins (7 pins) due to the asymmetry between the upper and lower rows and the need to maintain a regular shape for the coupler assembly's housing. In contrast, this solution, with its symmetrical arrangement of the first and third rows of pins, avoids wasted corner space even with an odd number of pins and a regular coupler assembly housing shape, significantly improving the overall compactness of the pin arrangement and the rationality of space utilization.

[0061] 2. Since the seventh pin is located within the area enclosed by the first, second, third, and fourth pins, when the line connecting the centers of the first and third pins is parallel to the line connecting the centers of the second and fourth pins, the positions of the first, second, third, and fourth pins are relatively fixed and regular. This allows for easy calculation of the distances from the seventh pin to each of the first, second, third, and fourth pins to meet the electrical safety pitch requirements, thus reducing the difficulty of determining the seventh pin's position during manufacturing and assembly. Furthermore, when the line connecting the centers of the first and third pins is parallel to the line connecting the centers of the second and fourth pins, the center of the seventh pin is located at the intersection of the line connecting the centers of the first and fourth pins and the line connecting the centers of the second and third pins. The distances from the seventh pin to each of the first, second, third, and fourth pins are all equal, and the position of the seventh pin is uniquely determined by this intersection point. Compared to the situation where the seventh pin is located near the intersection of the line connecting the centers of the first and fourth pins and the line connecting the centers of the second and third pins, which might require external measuring tools to determine if the distance between the seventh pin and the first, second, third, and fourth pins meets the electrical safety pitch, the seventh pin is located at the intersection of the line connecting the centers of the first and fourth pins and the line connecting the centers of the second and third pins. This further reduces the difficulty of determining the position of the seventh pin during manufacturing and assembly.

[0062] 3. When the first straight line is parallel to the second straight line, the distances from the eighth pin to the first, second, fifth, and sixth pins are all equal. The position of the eighth pin is uniquely determined by the intersection point. Compared to the area near the intersection of the line connecting the centers of the first and sixth pins and the line connecting the centers of the second and fifth pins, where the eighth pin is located near the intersection point, external measuring tools might be needed to determine if the distances between the eighth pin and the first, second, fifth, and sixth pins meet the electrical safety circle pitch. Therefore, the eighth pin's center is located at the intersection of the line connecting the centers of the first and sixth pins and the line connecting the centers of the second and fifth pins, reducing the difficulty of determining the eighth pin's position during manufacturing and assembly.

[0063] 4. The first and second circles are not tangent and have a first gap. The center pins of the first and second circles are determined respectively. The third and fifth pins are on the first circle or adjacent to the outside of the first circle, and the fourth and sixth pins are on the second circle or adjacent to the outside of the second circle. Therefore, the gaps between the first pin and the third and fifth pins are greater than or equal to the electrical safety circle gap, and the gaps between the second pin and the fourth and sixth pins are greater than or equal to the electrical safety circle gap. This ensures that adjacent pins in the first or third row from top to bottom are either on the center and circumference of the same circle, or on the center and outside of the same circle. Furthermore, due to the existence of the first gap, the distance between adjacent pins in the first and third rows further improves electrical safety while controlling the size of the coupler assembly as much as possible.

[0064] 5. By determining the center pin and drawing circles, the second and third pins are determined on the circumference of the circle centered on the center pin (first pin). Then, the second and third circles are drawn with the second and third pins as their centers, respectively. The fourth and fifth pins are determined at the intersection of the second and first circles, and the sixth and seventh pins are determined at the intersection of the second and third circles. Since the first, second, and third circles are all drawn with the electrical safety circle distance as the radius, the pins determined by the multiple intersecting circles can ensure that two adjacent pins are on the same circle center and circumference, thus ensuring the electrical safety of the coupler assembly. Secondly, although the fourth and seventh pins are spaced far apart, and the fifth and sixth pins are also spaced far apart, the first pin is positioned between the fourth and seventh pins, and between the fifth and sixth pins. Furthermore, the fourth, fifth, sixth, and seventh pins are all located on the circumference of the first circle, with the first pin being the center pin of the first circle. Clearly, four pins (the fourth, fifth, sixth, and seventh pins) radiate outwards from the first pin as the center. The first pin is positioned between two pins that are far apart, utilizing the blank area between them. Each pin is positioned on the circumference and center of the first, second, or third circle, making the pin arrangement sufficiently compact, thus resulting in a sufficiently small external size for the coupler assembly. In addition, existing technologies using a double-row array arrangement, in the case of an odd number of pins, result in a significant waste of corner space in one row due to the asymmetry of the upper and lower rows and the consideration of maintaining the regular shape of the coupler assembly's shell for ease of manufacturing. The three rows of pins in this solution are arranged symmetrically, so even if there are an odd number of pins (7 pins) and the coupler assembly housing has a regular shape, there will be no waste of space at the corners of the coupler assembly, which greatly improves the compactness of the overall pin arrangement and the rationality of space utilization.

[0065] 6. Based on the fact that the centers of the first, second, and third pins are on the same straight line, the first circle is centered on the first pin, the second circle is centered on the second pin, and the positions of the fourth and fifth pins are determined by the two intersection points of the first and second circles. Similarly, the third circle is centered on the third pin, and the positions of the sixth and seventh pins are determined by the two intersection points of the first and third circles. Since the centers of the first, second, and third pins are on the same straight line, it can be seen that the positions of the fourth and sixth pins are also on the same straight line, as are the positions of the fifth and seventh pins. This means that even if each row of pins from the first to the third row is on the same straight line, while ensuring that the pin arrangement is sufficiently compact, it also helps to make the shape of the coupler assembly's housing regular, thus making the coupler assembly a universal connector.

[0066] 7. By determining the center pin and drawing circles, the second and third pins are determined on the circumference of the circle centered on the center pin (first pin). The second and third circles are then drawn with the second and third pins as their centers. The fourth and fifth pins are determined outside the circle at the two adjacent intersection points of the second and first circles. The sixth and seventh pins are determined outside the circle at the two adjacent intersection points of the second and third circles. Since the first, second, and third circles are all drawn with the electrical safety circle distance as the radius, the pins determined by the multiple intersecting circles can ensure that two adjacent pins are on the center, circumference, or outside the circle at the two adjacent intersection points of the same circle, further enhancing the electrical safety of the coupler assembly. Attached Figure Description

[0067] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0068] Figure 1 This is an exploded view of a coupler assembly for a food processing machine according to an embodiment of the present invention.

[0069] Figure 2 This is a cross-sectional schematic diagram of a coupler assembly for a food processing machine according to an embodiment of the present invention.

[0070] Figure 3 This is a schematic diagram of the pin arrangement in one embodiment of the present invention.

[0071] Figure 4 This is a schematic diagram of the pin arrangement in another embodiment of the present invention.

[0072] Figure 5This is a schematic diagram of the pin arrangement in another embodiment of the present invention.

[0073] Figure 6 This is a schematic diagram of the pin arrangement in another embodiment of the present invention.

[0074] Figure 7 This is a schematic diagram of the pin arrangement in another embodiment of the present invention.

[0075] Figure 8 This is an electrical connection diagram of the food processing machine described in this utility model.

[0076] Figure 9 This is another electrical connection diagram of the food processing machine described in this utility model.

[0077] The names of the components shown in the diagram are as follows:

[0078] 1. Male coupler; 11. Pin; 111. First pin; 112. Second pin; 113. Third pin; 114. Fourth pin; 115. Fifth pin; 116. Sixth pin; 117. Seventh pin; 118. Eighth pin; 2. Female coupler; 21. Socket; 22. Spring; 23. Housing; 24. Sealing gasket; 25. Cover plate; 31. First long side; 32. Second long side; 33. First short side; 34. Second short side; 41. First circle; 42. Second circle; 43. Third circle; 5. Main unit; 6. Cup assembly. Detailed Implementation

[0079] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0080] Please refer to the following: Figures 1-2 A coupler assembly for a food processing machine includes a male coupler 1 and a female coupler 2 that are interlocked. The male coupler 1 has pins 11, and the female coupler 2 has sockets 21. A spring 22 is positioned at the corresponding position of the socket 21 in the female coupler 2. The male coupler 1 and female coupler 2 are interlocked, and the coupler assembly achieves circuit conduction and signal coupling through the contact between the pins 11 and the spring 22. For a given coupler assembly, the number of sockets 21 is greater than the number of pins 11; the extra sockets 21 can be reserved, and the female coupler 2 can be used as a standard universal connector. Figure 1As shown, the coupler assembly is cuboid. The female coupler includes a housing 23, a cover plate 25 covering the housing 23, and a sealing gasket 24 between the housing 23 and the cover plate 25. The female coupler generally adopts a hollow housing structure with a top wall (viewed from below), with a socket on the top wall and a spring inside the housing corresponding to the socket position. The male coupler generally adopts a hollow housing structure with an open bottom (viewed from above), with a pin (attached) on the inner top wall of the housing. Figure 1 (Not visible in the middle), based on the male end coupler housing being fitted onto the female end coupler housing, to achieve the plug-in connection between the male end coupler and the female end coupler.

[0081] In food processing machine couplers, where 6-8 pins are commonly used, the outer contour of the coupler assembly typically takes the form of long and short sides. That is, the male and female couplers have roughly corresponding long and short sides. The "long side" of the coupler assembly refers to the side with the relatively longer physical dimension, and the "short side" refers to the side with the relatively shorter physical dimension. In this invention, the long and short sides of the coupler assembly, for the male coupler and for the female coupler, refer to the long and short sides of the male and female couplers, respectively. In three-dimensional space, the long and short sides of the coupler assembly are the sidewalls of the male and female coupler housings. Since the dimensions of the sidewalls in the height direction are generally similar, for ease of understanding, in this invention, the long and short sides of the male coupler can be determined by the physical dimension (length) of the outer contour of the top wall where the pin root is located, and the long and short sides of the female coupler can be determined by the physical dimension (length) of the outer contour of the top wall where the socket is located. Of course, based on the correspondence between the male and female couplers in their plug-in mating, their long and short sides are inherently corresponding. Furthermore, it's understandable that the long and short sides of the coupler assembly can be straight with right angles, or for ease of insertion and removal, straight with rounded chamfers. Alternatively, the short or long side can be set with a small curvature or a convex hull (for easy positioning), etc. Since these are generally known in the field, they will not be elaborated upon here.

[0082] In one embodiment of this utility model, combined with Figure 1 and Figure 2 See Figure 3 ( Figure 3 This can be understood as, Figure 1 A schematic diagram showing the positional relationship between the pin root and the long and short sides of the male coupler, viewed from below. Figure 4-7Similarly, the male coupler 1 of this utility model has 7 or 8 pins 11, and in this embodiment, the pins have a circular cross-section; the female coupler 2 has a socket 21 that mates with the pins 11, i.e., a circular socket; for a given coupler assembly, an electrical safety circle pitch is set, and the center-to-center distance between any two pins 11 is not less than the electrical safety circle pitch; the first pin 111 is located near the first long side 31 of the coupler assembly; the second pin 112 is located near the second long side 32 of the coupler assembly, and the line connecting the center of the second pin 112 and the center of the first pin 111 extends along the short side of the coupler assembly; the first circle 41 and the second circle 42 are circles with the center of the first pin 111 and the center of the second pin 112 respectively, and the radius is the electrical safety circle pitch respectively. The two circles 42 are tangent to each other; the third pin 113 and the fourth pin 114 are both located on the first short side 33 of the coupler assembly, with the center of the third pin 113 located on the first circle 41 and the center of the fourth pin 114 located on the second circle 42; the fifth pin 115 and the sixth pin 116 are both located on the second short side 34 of the coupler assembly, with the center of the fifth pin 115 located on the first circle 41 and the center of the sixth pin 116 located on the second circle 42; the seventh pin 117 is located in the area enclosed by the first pin 111, the second pin 112, the third pin 113 and the fourth pin 114. As mentioned above, the seventh pin 117 must satisfy the requirement that the center-to-center distance between it and any one of the first pin 111, the second pin 112, the third pin 113 and the fourth pin 114 is not less than the electrical safety circle distance.

[0083] It is understandable that by drawing circles, the first circle 41 and the second circle 42 are tangent, and the center and circumference of the first circle 41 and the second circle 42 are determined respectively. Since the first circle 41 and the second circle 42 are both drawn with the electrical safety circle distance as the radius, it can be ensured that two adjacent pins 11 in the first or third row from top to bottom are on the same circle center and circumference. Moreover, the distance between two adjacent pins 11 in the first and third rows is much greater than the electrical safety circle distance, so that the first pin 111, the second pin 112, the third pin 113, the fourth pin 114, the fifth pin 115 and the sixth pin 116 can meet the electrical safety requirements. Secondly, the distance between the fifth pin 115 on the circumference of the first circle 41 and the fourth pin 114 on the circumference of the second circle 42, or the third pin 113 on the circumference of the first circle 41 and the sixth pin 116 on the circumference of the second circle 42, is relatively long. In the blank area between these two pairs of pins 11, a seventh pin 117 is arranged. The seventh pin 117 is spatially separated from the fifth pin 115 and the fourth pin 114. The seventh pin 117 is also separated from the third pin 113 and the sixth pin 116. The seventh pin 117 is also separated from the first pin and the fourth pin. The second and third pins are two pins that are the second furthest apart. By utilizing the blank area between the two furthest or second furthest pins 11, and with each pin 11 located on the circumference and center of the first circle 41 or the second circle 42, the arrangement of the entire pin 11 is compact enough, thereby making the outer size of the coupler assembly small enough. Furthermore, the spacing between the seventh pin 117 and its adjacent first pin 111, second pin 112, third pin 113, and fourth pin 114 meets the electrical safety circle pitch, ensuring electrical safety. In addition, existing technologies, using a double-row array arrangement, result in wasted corner space in one row when there are an odd number of pins (7 pins 11) due to the asymmetry between the upper and lower rows of pins 11 and the need for a regular shape for the coupler assembly's housing. In contrast, this solution, with its symmetrical arrangement of the first and third rows of pins 11, avoids wasted corner space even with an odd number of pins and a regular shape for the coupler assembly's housing, significantly improving the compactness and space utilization of the overall pin arrangement. It is also understood that, based on the interlocking relationship between the male and female couplers, the pin layout in this invention is also the layout of the female coupler's sockets, which will not be elaborated further, and will be repeated in subsequent implementations.

[0084] It should be noted that the electrical safety clearance is a set value. For a given coupler assembly, the electrical safety clearance of this invention is understood as a fixed distance value. How to set the electrical safety clearance is well known to those skilled in the art, and can be obtained by referring to textbooks, national standards, etc., for example, the following sections of national standard GB-T 4706.1-2024:

[0085] As stated in 1.29.1, "However, if the distance in the structure is affected by wear, deformation, component movement or assembly, the electrical clearance corresponding to a rated pulse voltage of 1500V or higher shall be increased by 0.5mm."

[0086] 2.29.1.3 states that "the electrical clearance for reinforced insulation shall not be less than the specified value for basic insulation in Table 16, but the rated pulse voltage value of the next higher level shall be used as the reference."

[0087] The description in 3.29.2 states that "the structure of the appliance should ensure that its creepage distance is not less than the value corresponding to its operating voltage, and take into account its material composition and pollution level."

[0088] 4.29.2.3 "The creepage distance of reinforced insulation shall be at least twice the value specified in Table 17 for basic insulation or twice the value specified in Table 2 of GB / T16935.4—2011."

[0089] As is well known to those skilled in the art, since the coupler assembly of a food processing machine generally needs to conduct both strong and weak currents simultaneously, the coupler assembly of the food processing machine must meet the requirements for reinforced insulation in terms of both electrical clearance and creepage distance. For food processing machines, according to section 29.1.3 of the national standard GB-T 4706.1-2024, "the electrical clearance for reinforced insulation shall not be less than the specified value for basic insulation in Table 16, but the next higher level of rated pulse voltage value shall be used as the reference." That is, although the rated pulse voltage of the food processing machine is 2500V, the minimum electrical clearance of the next higher level is required. The minimum electrical clearance for the next higher level of rated pulse voltage, 4000V, is selected as 3mm (selected according to Table 16 of the national standard). Furthermore, according to section 29.1 of the national standard GB-T4706.1-2024, "However, if the distance in the structure is affected by wear, deformation, component movement, or assembly, the electrical clearance corresponding to a rated pulse voltage of 1500V or higher shall be increased by 0.5mm." Therefore, in the field of food processing machines, the minimum electrical clearance of the coupler assembly (pin) should be set to 3.5mm (3mm + 0.5mm).

[0090] Common food processing machines operate at 220V AC mains voltage, which falls under the national standard's requirement of a working voltage less than 250V. Since the couplers in food processing machines are generally made of plastic and other insulating materials, primarily belonging to group IIIa (CTI175-400), and considering the potential for these machines to operate in the high-humidity environment of a kitchen, and the possibility of the couplers coming into contact with water, it is generally customary in this field to classify the working environment of the food processing machine coupler assembly as pollution level 3. According to GB-T 4706.1-2024, section 29.2.3, "The creepage distance of reinforced insulation shall be at least twice the value specified in Table 17 for basic insulation or twice the value specified in Table 2 of GB / T16935.4-2011." Therefore, under the pollution level of 3 and material group IIIa (based on the national standard's Table 17 selecting 4mm for basic insulation), the minimum creepage distance for reinforced insulation required for the food processing machine coupler assembly should be set to 8mm (4mm*2).

[0091] Based on the aforementioned national standards, and as is known to those skilled in the art, for a given coupler, a minimum distance of 3.5mm between the outer surfaces of two adjacent pins is sufficient to meet the electrical clearance requirements. However, a creepage distance of 8mm must also be met. Therefore, it is generally necessary to extend the creepage distance by wrapping the base of the pins with insulating material. This involves wrapping an insulating protective sleeve around the base of the pin 11, ensuring that the creepage distance between the two pins 11 can only move along a predetermined insulating path. After installing the insulating protective sleeve, the creepage path has bends, further increasing the creepage path between the two pins 11. Thus, while meeting the minimum creepage distance between the two pins 11, the distance between adjacent pins 11 can be set closer. However, this can lead to excessively long wrapping. Therefore, the distance between the outer surfaces of two adjacent pins is generally set to 5-7mm to minimize the distance between the pins. Wrapping the base of the pins with insulating material avoids excessive wrapping while still meeting the creepage distance requirement. If the distance between the outer surfaces of two adjacent pins is greater than or equal to 8mm, it can meet both the electrical clearance requirements and the creepage distance specified in the national standard without the pins being coated with glue. However, the pin arrangement is not compact enough, which will make the outer dimensions of the coupler assembly larger.

[0092] Therefore, based on the principle of this utility model, the set electrical safety circle distance is not less than the sum of the minimum electrical clearance specified in the national standard and the outer diameter of the pin 11 (for a pin with a circular cross-section, that is, the diameter of the circle; for a pin with a rectangular cross-section, that is, the diameter of the circumcircle of the rectangle), and at the same time meets the creepage distance requirements.

[0093] For ease of understanding, the following example is provided. If the coupler assembly uses circular pins with a diameter of 2mm, then the set electrical safety pitch should be at least 5.5mm (3.5mm + 2mm). In this case, the two closest pins (e.g., the first pin 111 and the third pin 113 in this embodiment) each need to have a root overlay height of at least 2.75mm. To avoid excessively long overlays at the pin roots and to appropriately improve electrical safety at the electrical clearance angle, the distance between the outer surfaces of the two closest pins is set to 5mm (each with an overlay height of 1.5mm), resulting in a set electrical safety pitch of 7mm (5mm + 2mm). It is understandable that those skilled in the art, after determining the outer diameter of the coupler pins, can fully understand how to set the electrical safety pitch and can choose it themselves based on common knowledge in the field. Of course, in order to minimize the size of the coupler assembly as much as possible, it is preferable to set the distance between the outer surfaces of the two nearest pins to be slightly greater than 3.5 mm and not greater than 8 mm. For example, when the distance between the outer surfaces of the two nearest pins is set to 5-7 mm, and the coupler assembly uses 2 mm diameter circular pins, the preferred electrical safety pitch is 7-9 mm.

[0094] It should be noted that the first pin 111 is positioned close to the first long side 31 of the coupler assembly, such as... Figure 3 As shown, the physical distance between the first pin 111 and the first long side 31 of the coupler assembly must meet the electrical clearance requirements between the pin 11 and the first long side of the male coupler. Similarly, the second pin 112 is positioned close to the second long side 32 of the coupler assembly, and the physical distance between the second pin 112 and the second long side 32 of the male coupler must also meet the electrical clearance requirements between the pin 11 and the second long side 32 of the male coupler. The center-to-center distance between any two pins 11 is not less than the electrical safety circle pitch, meaning that the center-to-center distance between any two pins 11 can be slightly greater than the electrical safety circle pitch. In this case, it ensures that the pin arrangement is as compact as possible, further improving electrical safety while controlling the size of the coupler assembly as much as possible. For example, the center-to-center distance between any two pins 11 can be slightly greater than the electrical safety circle pitch, and the value of "slightly greater" can be less than 2 mm.

[0095] As a preferred embodiment, such as Figure 3As shown, the line connecting the center of the first pin 111 and the center of the third pin 113 is parallel to the line connecting the center of the second pin 112 and the center of the fourth pin 114, and extends horizontally. Since the seventh pin 117 is located within the area enclosed by the first pin 111, the second pin 112, the third pin 113, and the fourth pin 114, when the line connecting the center of the first pin 111 and the center of the third pin 113 is parallel to the line connecting the center of the second pin 112 and the center of the fourth pin 114, the positions of the first pin 111, the second pin 112, the third pin 113, and the fourth pin 114 are relatively fixed and regular. This makes it easy to calculate the position of the seventh pin 117 relative to the first pin 111, the second pin 112, the third pin 113, and the fourth pin 114 to meet the electrical safety circle pitch requirement, thereby reducing the difficulty of determining the position of the seventh pin 117 during manufacturing and assembly.

[0096] Alternatively, the line connecting the first pin 111 and the third pin 113 may be parallel to the line connecting the second pin 112 and the fourth pin 114, and both may extend in the same direction.

[0097] Alternatively, the line connecting the first pin 111 and the third pin 113 can be extended to intersect the line connecting the second pin 112 and the fourth pin 114. Specifically, the third pin 113 is closer to the first long side, the position of the first pin 111 remains unchanged, and the line connecting the first pin 111 and the third pin 113 slopes upwards from the center line. The fourth pin is closer to the second long side, the position of the second pin remains unchanged, and the line connecting the second pin and the fourth pin slopes downwards from the center line, ensuring electrical safety by maintaining the distances of the seventh pin to the first pin 111, the second pin 112, the third pin 113, and the fourth pin 114.

[0098] In a preferred embodiment, when the line connecting the centers of the first pin 111 and the third pin 113 is parallel to the line connecting the centers of the second pin 112 and the fourth pin 114, the center of the seventh pin 117 is located at the intersection of the line connecting the centers of the first pin 111 and the fourth pin 114 with the line connecting the centers of the second pin 112 and the third pin 113. As shown in the figure, the seventh pin 117 is located outside the circles adjacent to the first circle and the second circle, respectively. The distances from the seventh pin 117 to the first pin 111, the second pin 112, the third pin 113, and the fourth pin 114 are all equal and slightly larger than the electrical safety circle distance. This not only satisfies electrical safety requirements but also uniquely determines the position of the seventh pin 117 by the intersection point. When a circle is drawn with the center of the seventh pin as the center and the radius being slightly larger than the electrical safety circle distance, the first pin 111, the second pin 112, the third pin 113, and the fourth pin 114 are all located on the circumference of the circle. Compared to the situation where the seventh pin 117 is located near the intersection of the line connecting the centers of the first pin 111 and the fourth pin 114 with the line connecting the centers of the second pin 112 and the third pin 113, the location of the seventh pin 117 near the intersection might require external measuring tools to determine whether the distance between the seventh pin 117 and the first pin 111, the second pin 112, the third pin 113, and the fourth pin 114 meets the electrical safety pitch. Therefore, the location of the seventh pin 117 at the intersection of the line connecting the centers of the first pin 111 and the fourth pin 114 with the line connecting the centers of the second pin 112 and the third pin 113 further reduces the difficulty of determining the position of the seventh pin 117 during manufacturing and assembly.

[0099] It should be noted that the center of the seventh pin 117 can also be located near the intersection of the line connecting the centers of the first pin 111 and the fourth pin 114 with the line connecting the centers of the second pin 112 and the third pin 113. In this case, the distance between the seventh pin and one of the first pin 111, the second pin 112, the third pin 113, and the fourth pin 114 may be equal to the electrical safety circle pitch, while the distance between the seventh pin and the other three pins may be greater than the electrical safety circle pitch. Of course, the seventh pin can also be set in various positions, as long as the distance between the seventh pin 117 and the first pin 111, the second pin 112, the third pin 113, and the fourth pin 114 is greater than or equal to the electrical safety circle pitch.

[0100] When there is a need to add 8 pins 11 to expand the functionality of the coupler, the method for determining the eighth pin 118 is as follows: Figure 3As shown, the centers of the first pin 111, the third pin 113, and the fifth pin 115 are located on the first straight line, while the centers of the second pin 112, the fourth pin 114, and the sixth pin 116 are located on the second straight line. Both the first and second straight lines extend horizontally and are parallel to each other. Alternatively, the first and second straight lines can be parallel to each other and both extend at an angle in the same direction (not shown in the figure).

[0101] Specifically, such as Figure 3 As shown, the center of the eighth pin 118 is located at the intersection of the line connecting the centers of the first pin 111 and the sixth pin 116, and the line connecting the centers of the second pin 112 and the fifth pin 115. It can be seen from the figure that the eighth pin 118 is located outside the circles adjacent to the first and second circles, respectively. Clearly, the distances between the eighth pin 118 and the first pin 111, second pin 112, fifth pin 115, and sixth pin 116 are slightly greater than the electrical safety circle distance, satisfying the electrical safety requirements. Furthermore, when a circle is drawn with the center of the eighth pin 118 as the center and a radius slightly greater than the electrical safety circle distance, the first pin, second pin 112, fifth pin 115, and sixth pin 116 are all located on the circumference of this circle.

[0102] The eighth pin 118 and the seventh pin 117 are symmetrically arranged. The distances from the eighth pin to the first pin, the seventh pin to the first pin, and the seventh pin to the eighth pin form an equilateral triangle. Similarly, the distances from the eighth pin to the second pin, the seventh pin to the second pin, and the seventh pin to the eighth pin also form an equilateral triangle. Since the distance between the eighth pin 118 and the first pin 111 is slightly larger than the electrical safety circle pitch, and the distance between the seventh pin 117 and the first pin 111 is also slightly larger than the electrical safety circle pitch, the distance between the seventh pin 117 and the eighth pin 118 is not less than the electrical safety circle pitch, thus meeting the electrical safety requirements.

[0103] It is understandable that when the first straight line is parallel to the second straight line, the distances from the eighth pin 118 to the first pin 111, the second pin 112, the fifth pin 115 and the sixth pin 116 are all equal, and the position of the eighth pin 118 is uniquely determined by the intersection point. Compared to the location of the eighth pin 118 near the intersection of the line connecting the centers of the first pin 111 and the sixth pin 116 with the line connecting the centers of the second pin 112 and the fifth pin 115, where the eighth pin 118 is located near the intersection, external measuring tools may be needed to determine whether the distance between the eighth pin 118 and the first pin 111, the second pin 112, the fifth pin 115, and the sixth pin 116 meets the electrical safety pitch. Therefore, the location of the eighth pin 118 is located at the intersection of the line connecting the centers of the first pin 111 and the sixth pin 116 with the line connecting the centers of the second pin 112 and the fifth pin 115, reducing the difficulty of determining the position of the eighth pin 118 during manufacturing and assembly.

[0104] It should be noted that the eighth pin 118 can be located within the area enclosed by the first pin 111, the second pin 112, the fifth pin 115, and the sixth pin 116. The center of the eighth pin 118 can be located near the intersection of the line connecting the centers of the first pin 111 and the sixth pin 116 with the line connecting the centers of the second pin 112 and the fifth pin 115, as long as the distance from the eighth pin 118 to the first pin 111, the second pin 112, the fifth pin 115, and the sixth pin 116 is greater than or equal to the electrical safety circle pitch.

[0105] In other embodiments, the first and second straight lines may not be parallel, and the first and second straight lines may be respectively set as broken lines. For example, the center of the fifth pin is closer to the first long side, the position of the center of the first pin remains unchanged, and the line connecting the center of the first pin and the center of the fifth pin slopes upward from the center line; the center of the sixth pin is closer to the second long side, the position of the center of the second pin remains unchanged, and the line connecting the center of the second pin and the center of the sixth pin slopes downward from the center line, so that the distances of the eighth pin to the first pin 111, the second pin 112, the fifth pin, and the sixth pin can ensure electrical safety.

[0106] In another embodiment, such as Figure 4As shown, the difference from the previous embodiment is that the male coupler 1 has 7 or 8 pins 11; the female coupler 2 has a socket 21 that mates with the pins 11; the electrical safety pitch is such that the center-to-center distance between any two pins 11 is not less than the electrical safety pitch; the first pin 111 is located near the first long side 31 of the coupler assembly; the second pin 112 is located near the second long side 32 of the coupler assembly, and the line connecting the center of the second pin 112 and the center of the first pin 111 extends along the short side of the coupler assembly; the first circle 41 and the second circle 42 are circles with the center of the first pin 111 and the center of the second pin 112 respectively, and the electrical safety pitch is the radius of each circle, forming a circle between the first circle 41 and the second circle 42. The first spacing; the third pin 113 and the fourth pin 114 are both located on the first short side 33 side of the coupler assembly, the center of the third pin 113 is located on or near the outside of the first circle 41, and the center of the fourth pin 114 is located on or near the outside of the second circle 42; the fifth pin 115 and the sixth pin 116 are both located on the second short side 34 side of the coupler assembly, the center of the fifth pin 115 is located on or near the outside of the first circle 41, and the center of the sixth pin 116 is located on or near the outside of the second circle 42; the seventh pin 117 is located in the area enclosed by the first pin 111, the second pin 112, the third pin 113 and the fourth pin 114.

[0107] It should be noted that the "first spacing" can be less than 2mm, the distance to the "outside the first circle 41" can be less than 2mm, and the distance to the "outside the second circle 42" can be less than 2mm.

[0108] It is understood that the first circle 41 and the second circle 42 are not tangent and have a first distance, respectively determining the center of the first circle 41 and the second circle 42. The third pin 113 and the fifth pin 115 are on the first circle 41 or adjacent to the outside of the first circle 41, and the fourth pin 114 and the sixth pin 116 are on the second circle 42 or adjacent to the outside of the second circle 42. Therefore, the distance between the first pin 111 and the third pin 113 and the fifth pin 115 is greater than or equal to the electrical safety circle pitch, and the distance between the second pin 112 and the fourth pin 114 and the sixth pin 116 is greater than or equal to the electrical safety circle pitch. This ensures that two adjacent pins 11 in the first or third row from top to bottom are on the center and circumference of the same circle, or on the center and outside the same circle. Furthermore, the distance between two adjacent pins 11 in the first and third rows is greater than twice the electrical safety circle pitch due to the existence of the first distance. This further enhances the electrical safety of the first pin 111, second pin 112, third pin 113, fourth pin 114, fifth pin 115, and sixth pin 116 while controlling the size of the coupler assembly as much as possible. Secondly, the distance between the fifth pin 115 on or outside the circumference of the first circle 41 and the fourth pin 114 on or outside the circumference of the second circle 42, or the distance between the third pin 113 on or outside the circumference of the first circle 41 and the sixth pin 116 on or outside the circumference of the second circle 42, is relatively long. A seventh pin 117 is arranged in the blank area between these two pairs of pins 11. The seventh pin 117 is spatially spaced between the fifth pin 115 and the fourth pin 114, and also between the third pin 113 and the sixth pin 116. By utilizing the blank area between the two farthest pins 11, the arrangement of the pins 11 is made as compact as possible, thereby reducing the external dimensions of the coupler assembly. Furthermore, the distances between the seventh pin 117 and the adjacent first pin 111, second pin 112, third pin 113, and fourth pin 114 meet the electrical safety pitch requirements to ensure electrical safety. Furthermore, existing technologies, using a double-row array arrangement, result in wasted corner space in one row when there are an odd number of pins (7 pins 11) due to the asymmetry between the upper and lower rows of pins 11 and the need to maintain a regular shape for the coupler assembly's housing for ease of manufacturing. In contrast, this solution, with its symmetrical arrangement of the first and third rows of pins 11, avoids wasted corner space even with an odd number of pins and a regular shape for the coupler assembly's housing, significantly improving the overall compactness of the pin 11 arrangement and the rationality of space utilization.

[0109] In a preferred embodiment, the line connecting the first pin 111 and the third pin 113 is parallel to the line connecting the second pin 112 and the fourth pin 114, and the seventh pin 117 is located at the intersection of the line connecting the first pin 111 and the fourth pin 114 and the line connecting the second pin 112 and the third pin 113.

[0110] It should be noted that the seventh pin 117 is located within the area enclosed by the first pin 111, the second pin 112, the third pin 113, and the fourth pin 114. The center of the seventh pin 117 can be located at or near the intersection of the line connecting the centers of the first pin 111 and the fourth pin 114 with the line connecting the centers of the second pin 112 and the third pin 113, as long as the distance from the seventh pin 117 to the first pin 111, the second pin 112, the third pin 113, and the fourth pin 114 is greater than or equal to the electrical safety circle pitch.

[0111] Understandably, since the seventh pin 117 is located within the area enclosed by the first pin 111, the second pin 112, the third pin 113, and the fourth pin 114, when the line connecting the centers of the first pin 111 and the third pin 113 is parallel to the line connecting the centers of the second pin 112 and the fourth pin 114, the positions of the first pin 111, the second pin 112, the third pin 113, and the fourth pin 114 are relatively fixed and regular. This makes it easy to calculate the positions where the distances from the seventh pin 117 to the first pin 111, the second pin 112, the third pin 113, and the fourth pin 114 meet the electrical safety pitch requirements, thereby reducing the difficulty of determining the position of the seventh pin 117 during manufacturing and assembly.

[0112] When the line connecting the center of the first pin 111 and the center of the third pin 113 is parallel to the line connecting the center of the second pin 112 and the center of the fourth pin 114, the center of the seventh pin 117 is located at the intersection of the line connecting the center of the first pin 111 and the center of the fourth pin 114 and the line connecting the center of the second pin 112 and the center of the third pin 113. The distances from the seventh pin 117 to the first pin 111, the second pin 112, the third pin 113 and the fourth pin 114 are all equal. The position of the seventh pin 117 is uniquely determined by the intersection point. Compared to the situation where the seventh pin 117 is located near the intersection of the line connecting the centers of the first pin 111 and the fourth pin 114 with the line connecting the centers of the second pin 112 and the third pin 113, the location of the seventh pin 117 near the intersection might require external measuring tools to determine whether the distance between the seventh pin 117 and the first pin 111, the second pin 112, the third pin 113, and the fourth pin 114 meets the electrical safety pitch. Therefore, the location of the seventh pin 117 at the intersection of the line connecting the centers of the first pin 111 and the fourth pin 114 with the line connecting the centers of the second pin 112 and the third pin 113 further reduces the difficulty of determining the position of the seventh pin 117 during manufacturing and assembly.

[0113] Furthermore, the first pin 111, the third pin 113, and the fifth pin 115 are located on the first straight line, and the second pin 112, the fourth pin 114, and the sixth pin 116 are located on the second straight line. The first straight line is parallel to the second straight line. With the positions of the first and third rows of pins 11 relatively fixed, the positions of the second row of pins 11 (the seventh pin 117 and the eighth pin) can be easily calculated, thereby reducing the difficulty of determining the positions of the second row of pins 11 during manufacturing and assembly.

[0114] In yet another embodiment, such as Figure 5 As shown, the male coupler 1 has 7 pins 11; the female coupler 2 has sockets 21 that mate with the pins 11; the electrical safety pitch is such that the center-to-center distance between any two pins 11 is not less than the electrical safety pitch; the first pin 111 is located in the central region of the coupler assembly; the second pin 112 and the third pin 113 are located on the first short side 33 and the second short side 34 of the coupler assembly, respectively, with the center of the second pin 112 and the center of the third pin 113 both located on the first circle 41, which is centered on the center of the first pin 111. A circle with electrical safety circle spacing as its radius; fourth pin 114 and fifth pin 115, the center of fourth pin 114 and the center of fifth pin 115 are respectively located at two intersections of the first circle 41 and the second circle 42, the second circle 42 is a circle with the center of second pin 112 as its center and the electrical safety circle spacing as its radius; sixth pin 116 and seventh pin 117, the center of sixth pin 116 and the center of seventh pin 117 are respectively located at two intersections of the first circle 41 and the third circle 43, the third circle 43 is a circle with the center of third pin 113 as its center and the electrical safety circle spacing as its radius.

[0115] It should be noted that the first pin 111 is located in the central region of the coupler assembly. This central region means that the first pin 111 can be located in any area near the center of the coupler assembly. Preferably, the first pin 111 is located at the exact center of the coupler assembly. Figure 5 As shown, the coupler assembly has a rectangular cross-section.

[0116] Understandably, by determining the center pin and drawing circles, the second pin 112 and the third pin 113 are determined on the circumference of the circle centered on the center pin (first pin 111). Then, the second circle 42 and the third circle 43 are drawn with the second pin 112 and the third pin 113 as the centers, respectively. The fourth pin 114 and the fifth pin 115 are determined at the intersection of the second circle 42 and the first circle 41, and the sixth pin 116 and the seventh pin 117 are determined at the intersection of the second circle 42 and the third circle 43. Since the first circle 41, the second circle 42, and the third circle 43 are all drawn with the electrical safety circle distance as the radius, the pins 11 determined by multiple intersecting circles can ensure that two adjacent pins 11 are on the same circle center and circumference, thus ensuring electrical safety.

[0117] Secondly, such as Figure 5 As shown, in this embodiment, the center-to-center distance between the fourth pin 114 and the fifth pin 115 is less than twice the electrical safety circle distance (i.e., the vertical distance between the first row of pins and the third row of pins). (See attached diagram) Figure 3 In the corresponding embodiment, the center-to-center distance between the first and second pins is equal to twice the electrical safety circle distance (i.e., the vertical distance between the first row of pins and the third row of pins). Therefore, in both embodiments, when the first row of pins and the third row of pins have the same long-side spacing from the nearest male coupler, the short-side dimension of the male coupler is mainly determined by the vertical distance between the first row of pins and the third row of pins. Obviously, in this embodiment, the short-side dimension of the male coupler is smaller than that of the attached pin. Figure 3 In this embodiment, the pin layout of the male coupler is more compact when arranging 7 pins, further compressing the short side dimension of the coupler assembly and making the external dimension of the coupler assembly as small as possible.

[0118] Furthermore, although the fourth pin 114 and the seventh pin 117 are spaced far apart, and the fifth pin 115 and the sixth pin 116 are also spaced far apart, the first pin 111 is positioned between the fourth pin 114 and the seventh pin 117, and between the fifth pin 115 and the sixth pin 116. Moreover, the fourth pin 114, the fifth pin 115, the sixth pin 116, and the seventh pin 117 are all located on the circumference of the first circle 41, with the first pin 111 being the center pin of the first circle 41. Clearly, four pins 11 radiate outward from the first pin 111 (fourth pin 114, fifth pin 115, sixth pin 116, and seventh pin 117). The first pin 111 is arranged between two pins 11 that are relatively far apart, utilizing the blank area between the two farthest pins 11. Furthermore, each pin 11 is positioned on the circumference and center of the first circle 41, the second circle 42, or the third circle 43, making the arrangement of the pins 11 sufficiently compact, thus resulting in a sufficiently small external size for the coupler assembly. In addition, existing technologies using a double-row array arrangement, in the case of an odd number of pins, result in asymmetrical arrangement of the upper and lower rows of pins 11. Also, considering the need for a regular shape for the coupler assembly's housing to facilitate manufacturing, one row clearly wastes corner space. In this design, the three rows of pins 11 are arranged symmetrically, so even if there is an odd number of pins (7 pins 11) and the shape of the coupler assembly housing is regular, there will be no waste of space at the corners of the coupler assembly, which greatly improves the compactness of the overall pin 11 arrangement and the rationality of space utilization.

[0119] Alternatively, since the fourth and fifth pins are relatively far from the first short side, and the sixth and seventh pins are relatively far from the second short side, the four corners of the coupler assembly cross-section can be chamfered or rounded to reduce the housing size of the coupler assembly and achieve cost reduction.

[0120] As a preferred embodiment, such as Figure 5 As shown, the centers of the first pin 111, the second pin 112, and the third pin 113 are located on the same straight line, which is a horizontal straight line.

[0121] It is understandable that the first circle 41 is centered on the first pin 111, the second circle 42 is centered on the second pin 112, and the positions of the fourth pin 114 and the fifth pin 115 are determined by the two intersection points of the first circle 41 and the second circle 42. The third circle 43 is centered on the third pin 113, and the positions of the sixth pin 116 and the seventh pin 117 are determined by the two intersection points of the first circle 41 and the third circle 43. Since the centers of the first pin 111, the second pin 112, and the third pin 113 are on the same straight line, it can be known that the positions of the fourth pin 114 and the sixth pin 116 are also on the same straight line, and the positions of the fifth pin 115 and the seventh pin 117 are also on the same straight line. Even if the pins 11 in each row from the first to the third row are on the same straight line, it is beneficial to make the shape of the coupler assembly's shell regular while ensuring that the pins 11 are arranged compactly enough, thus making the coupler assembly a universal connector.

[0122] Alternatively, the first pin 111, the second pin 112, and the third pin 113 can be aligned on the same straight line and slightly tilted. In this case, the line connecting the fourth and sixth pins can also be slightly tilted, as can the line connecting the fifth and seventh pins, so that the three lines are parallel to each other.

[0123] In yet another embodiment, such as Figure 6 As shown, the male coupler 1 has 7 pins 11; the female coupler 2 has sockets 21 that mate with the pins 11; the electrical safety pitch is such that the center-to-center distance between any two pins 11 is not less than the electrical safety pitch; the first pin 111 is located in the central region of the coupler assembly; the second pin 112 and the third pin 113 are located on the first short side 33 and the second short side 34 of the coupler assembly, respectively, with the center of the second pin 112 and the center of the third pin 113 both located on the first circle 41, which has the center of the first pin 111 as its center and the electrical safety pitch as its radius. The circle; the fourth pin 114 and the fifth pin 115, the center of the fourth pin 114 and the center of the fifth pin 115 are respectively located outside the circle at two adjacent intersection points of the first circle 41 and the second circle 42, the second circle 42 is a circle with the center of the second pin 112 as the center and the electrical safety circle distance as the radius; the sixth pin 116 and the seventh pin 117, the center of the sixth pin 116 and the center of the seventh pin 117 are respectively located outside the circle at two adjacent intersection points of the first circle 41 and the third circle 43, the third circle 43 is a circle with the center of the third pin 113 as the center and the electrical safety circle distance as the radius. In this embodiment, the cores of the second pin 112 and the third pin 113 are located on the circle of the first circle 41, the cores of the fourth pin 114 and the fifth pin 115 are located outside the circles of the first circle 41 and the second circle 42, and the cores of the sixth pin 116 and the seventh pin 117 are located outside the circles of the first circle 41 and the third circle 43.

[0124] It should be noted that the distance between the "centers of the fourth pin 114 and the fifth pin 115 located outside the circles at the two adjacent intersections of the first circle 41 and the second circle 42" can be less than 2mm, and the distance between the "centers of the sixth pin 116 and the seventh pin 117 located outside the circles at the two adjacent intersections of the first circle 41 and the third circle 43" can also be less than 2mm.

[0125] Understandably, by determining the center pin and drawing circles, the second pin 112 and the third pin 113 are determined on the circumference of the circle centered on the center pin (first pin 111). The second circle 42 and the third circle 43 are drawn with the second pin 112 and the third pin 113 as the centers, respectively. The fourth pin 114 and the fifth pin 115 are determined outside the circle at the two adjacent intersection points of the second circle 42 and the first circle 41. The sixth pin 116 and the seventh pin 117 are determined outside the circle at the two adjacent intersection points of the second circle 42 and the third circle 43. Since the first circle 41, the second circle 42, and the third circle 43 are all drawn with the electrical safety circle distance as the radius, the pins 11 determined by multiple intersecting circles can ensure that two adjacent pins 11 are on the center, circumference, or outside the circle at the two adjacent intersection points of the same circle. This further improves electrical safety while controlling the size of the coupler assembly as much as possible. Secondly, although the fourth pin 114 and the seventh pin 117 are relatively far apart, and the fifth pin 115 and the sixth pin 116 are also relatively far apart, the first pin 111 is positioned between the fourth pin 114 and the seventh pin 117, and between the fifth pin 115 and the sixth pin 116. Furthermore, the fourth pin 114, the fifth pin 115, the sixth pin 116, and the seventh pin 117 are all located outside the circle adjacent to the first circle 41. The first pin 111 is the center pin of the first circle 41. Clearly, with... Four pins 11 radiate outward from the first pin 111 (fourth pin 114, fifth pin 115, sixth pin 116, and seventh pin 117). The first pin 111 is arranged between two pins 11 that are relatively far apart, utilizing the blank area between the two farthest pins 11. Each pin 11 is located outside the center of the first circle 41, the second circle 42, or the third circle 43, or near the intersection of two circles, making the arrangement of the pins 11 as compact as possible, thereby reducing the external size of the coupler assembly. In addition, the prior art uses a double-row array arrangement. In the case of an odd number of pins, due to the asymmetry of the upper and lower rows of pins 11, and considering the need for a regular shape of the coupler assembly for easy processing, one row obviously wastes corner space. In this design, the three rows of pins 11 are arranged symmetrically, so even if there is an odd number of pins (7 pins 11) and the shape of the coupler assembly housing is regular, there will be no waste of space at the corners of the coupler assembly, which greatly improves the compactness of the overall pin 11 arrangement and the rationality of space utilization.

[0126] Furthermore, the centers of the first insert 111, the second insert 112, and the third insert 113 are located in the same straight line.

[0127] It is understandable that the first circle 41 is centered on the first pin 111, the second circle 42 is centered on the second pin 112, the fourth pin 114 and the fifth pin 115 are located outside the circles at the two nearest intersection points of the first circle 41 and the second circle 42, respectively, and the third circle 43 is centered on the third pin 113, the sixth pin 116 and the seventh pin 117 are located outside the circles at the two nearest intersection points of the first circle 41 and the third circle 43, respectively; based on the pin centers of the first pin 111, the second pin 112 and the third... Since the pins 113 are located on the same straight line, it can be inferred that the positions of the fourth pin 114 and the sixth pin 116 can also be on the same straight line or approximately on the same straight line, and the positions of the fifth pin 115 and the seventh pin 117 can also be on the same straight line or approximately on the same straight line. In other words, even if each row of pins 11 from the first to the third row is located on the same straight line, while ensuring that the arrangement of pins 11 is as compact as possible, it also helps to make the shape of the coupler assembly housing regular, which in turn helps the coupler assembly to become a universal connector.

[0128] In yet another embodiment, such as Figure 7As shown, the male coupler 1 has 7 pins 11; the female coupler 2 has sockets 21 that mate with the pins 11; the electrical safety pitch is such that the center-to-center distance between any two pins 11 is not less than the electrical safety pitch; the first pin 111 is located in the central region of the coupler assembly; the second pin 112 and the third pin 113 are located on the first short side 33 and the second short side 34 of the coupler assembly, respectively, with at least one of the pin centers of the second pin 112 and the third pin 113 located outside the circle adjacent to the first circle 41, and the other on or outside the circle adjacent to the first circle 41, the first circle 41 being a circle with the pin center of the first pin 111 as its center and the electrical safety pitch as its radius; the fourth pin 114 and the fifth pin 115, the fourth pin 114 having a pin center... The centers of the fifth and fifth pins 115 are located at the two intersections of the first circle 41 and the second circle 42, respectively; or the centers of the fourth and fifth pins 114 and the fifth pin 115 are located outside the circle at the two adjacent intersections of the first circle 41 and the second circle 42, respectively. The second circle 42 is a circle with the center of the second pin 112 as its center and the electrical safety circle distance as its radius. The centers of the sixth and seventh pins 116 and the seventh pin 117 are located at the two intersections of the first circle 41 and the third circle 43, respectively; or the centers of the sixth and seventh pins 116 and the seventh pin 117 are located outside the circle at the two adjacent intersections of the first circle 41 and the third circle 43, respectively. The third circle 43 is a circle with the center of the third pin 113 as its center and the electrical safety circle distance as its radius. In this embodiment, at least one of the pins of the second pin 112 and the third pin 113 is located outside the first circle 41; the pin of the fourth pin 114 is located on or outside the circumference of the first circle 41 and the second circle 42; the pin of the fifth pin 115 is located on or outside the circumference of the first circle 41 and the second circle 42; the sixth pin 116 is located on or outside the circumference of the first circle 41 and the third circle 43; and the seventh pin 117 is located on or outside the circumference of the first circle 41 and the third circle 43. The technical effects are similar to those of the previous embodiment and will not be described again.

[0129] It should be noted that the center of the fourth pin 114 and the center of the fifth pin 115 are located outside the circles at the two adjacent intersections of the first circle 41 and the second circle 42, respectively. The center of the sixth pin 116 and the center of the seventh pin 117 are located outside the circles at the two adjacent intersections of the first circle 41 and the third circle 43, respectively. The distance of "adjacent" to the outside of the first circle 41 can be less than 2mm.

[0130] Furthermore, the centers of the first insert 111, the second insert 112, and the third insert 113 are located on the same straight line. The technical effects are similar to those of the previous embodiment and will not be described again.

[0131] The coupler assembly provided in the embodiments of this utility model can be applied to a food processing machine that integrates a cup-making machine with a separate cup-making machine.

[0132] In one embodiment, such as Figure 8 As shown, the food processor includes a main unit 5 and a cup assembly 6. A switching power supply module, a variable frequency motor drive module, and a variable frequency motor are all housed within the main unit 5. The power supply terminals of the switching power supply module and the variable frequency motor drive module are electrically connected. The cup assembly 6 includes a cup body and a lid covering the cup body. A safety switch (such as a micro switch) is installed inside the cup body. The cup body is mounted on the main unit 5. One of the male coupler 1 and the female coupler 2 is located on the main unit 5, and the other is located at the bottom of the cup body.

[0133] The specific circuit principle is as follows: Figure 8 As shown, the switching power supply module outputs a Heat_N signal, which is connected to the safety switch inside the cup body via male coupler 1 and female coupler 2 (coupled vertically) and pin 2 11. If the safety switch is closed, the Moto_N signal is transmitted to the switching power supply module via male coupler 1 and female coupler 2 (coupled vertically) and pin 3 11. The switching power supply module then rectifies the signal and supplies power to the drive module to power the variable frequency motor and control its operation. When the safety switch is open, the N line of the rectifier bridge is disconnected, and the motor cannot run.

[0134] In another embodiment, such as Figure 9 As shown, the food processing machine includes a main unit 5 and a cup assembly 6. The switching power supply module and the variable frequency motor drive module are both located inside the main unit 5. The power supply terminals of the switching power supply module and the variable frequency motor drive module are electrically connected. The cup assembly 6 includes a cup body and a cup lid covering the cup body. A safety switch is installed inside the cup body. The cup body is installed on the main unit 5. One of the male coupler 1 and the female coupler 2 is located on the main unit 5, and the other is located at the bottom of the cup body. The variable frequency motor is located at the bottom of the cup body.

[0135] The specific circuit principle is as follows: Figure 9 As shown, the switching power supply module outputs a Heat_N signal, which is connected to the safety switch inside the cup body via male coupler 1 and female coupler 2 (coupled vertically) and pin 11. If the safety switch is closed, the Moto_N signal is transmitted to the switching power supply module via male coupler 1 and female coupler 2 (coupled vertically) and pin 81. The switching power supply module then rectifies the signal and supplies power to the drive module to power the variable frequency motor and control its operation. When the safety switch is open, the N line of the rectifier bridge is disconnected, and the motor cannot run.

[0136] In addition to the preferred embodiments described above, the technical solutions protected by this utility model are not limited to the above embodiments. It should be noted that the combination of multiple technical solutions in any one embodiment, as well as the combination of technical solutions in any one embodiment with technical solutions in one or more other embodiments, are within the protection scope of this utility model. Although this utility model has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A coupling assembly for a food processor, characterised in that, include: Male coupler with 7 or 8 pins; The female coupler is provided with a socket that mates with the pin; The electrical safety circle pitch, the center-to-center distance between any two pins shall not be less than the electrical safety circle pitch; The first pin is positioned near the first long side of the coupler assembly; The second pin is located near the second long side of the coupler assembly, and the line connecting the core of the second pin and the core of the first pin extends along the short side of the coupler assembly. The first circle and the second circle are tangent to each other, with the center of the first pin and the center of the second pin respectively, and the radius of the electrical safety circle distance respectively. The third pin and the fourth pin are both located on the first short side of the coupler assembly. The center of the third pin is located on the first circle, and the center of the fourth pin is located on the second circle. The fifth and sixth pins are both located on the second short side of the coupler assembly, with the center of the fifth pin located on the first circle and the center of the sixth pin located on the second circle. The seventh pin is located within the area enclosed by the first, second, third, and fourth pins.

2. The food processor coupler assembly of claim 1, wherein, The line connecting the first and third insert needle cores is parallel to the line connecting the second and fourth insert needle cores.

3. The food processor coupler assembly of claim 2, wherein, The seventh needle core is located at the intersection of the line connecting the first and fourth needle cores and the line connecting the second and third needle cores.

4. The food processor coupler assembly of claim 2, wherein, The first, third, and fifth needle cores are located on a first straight line, and the second, fourth, and sixth needle cores are located on a second straight line. The first straight line is parallel to the second straight line.

5. The food processor coupler assembly of claim 4, wherein, The eighth pin is located at the intersection of the line connecting the first and sixth pins and the line connecting the second and fifth pins.

6. A coupler assembly for a food processor, characterized by include: Male coupler with 7 or 8 pins; The female coupler is provided with a socket that mates with the pin; The electrical safety circle pitch, the center-to-center distance between any two pins shall not be less than the electrical safety circle pitch; The first pin is positioned near the first long side of the coupler assembly; The second pin is located near the second long side of the coupler assembly, and the line connecting the core of the second pin and the core of the first pin extends along the short side of the coupler assembly. The first circle and the second circle are respectively centered on the center of the first pin and the center of the second pin, and respectively have an electrical safety circle distance as their radius. The first circle and the second circle form a first gap. The third pin and the fourth pin are both located on the first short side of the coupler assembly. The center of the third pin is located on the first circle or outside the circle adjacent to the first circle, and the center of the fourth pin is located on the second circle or outside the circle adjacent to the second circle. The fifth and sixth pins are both located on the second short side of the coupler assembly. The center of the fifth pin is located on or near the outside of the first circle, and the center of the sixth pin is located on or near the outside of the second circle. The seventh pin is located within the area enclosed by the first, second, third, and fourth pins.

7. The food processor coupler assembly of claim 6, wherein, The line connecting the first and third insert needle cores is parallel to the line connecting the second and fourth insert needle cores, and the seventh insert needle core is located at the intersection of the line connecting the first and fourth insert needle cores and the line connecting the second and third insert needle cores.

8. The food processor coupler assembly of claim 6, wherein, The first, third, and fifth needle cores are located on a first straight line, and the second, fourth, and sixth needle cores are located on a second straight line. The first straight line is parallel to the second straight line.

9. A coupler assembly for a food processor, characterized by, include: Male coupler with 7 pins; The female coupler is provided with a socket that mates with the pin; The electrical safety circle pitch, the center-to-center distance between any two pins shall not be less than the electrical safety circle pitch; The first pin is located in the central region of the coupler assembly; The second pin and the third pin are located on the first short side and the second short side of the coupler assembly, respectively. The center of the second pin and the center of the third pin are both located on the first circle, with the center of the first pin as the center and the electrical safety circle distance as the radius. The fourth and fifth pins are located at the two intersections of the first and second circles, respectively. The second circle has the second pin center as its center and the electrical safety circle distance as its radius. The sixth and seventh pins are located at the two intersections of the first and third circles, respectively. The third circle has the center of the third pin as its center and the electrical safety circle distance as its radius.

10. The food processor coupler assembly of claim 9, wherein, The first needle core, the second needle core, and the third needle core are located in a straight line.

11. A coupler assembly for a food processor, characterized by include: Male coupler with 7 pins; The female coupler is provided with a socket that mates with the pin; The electrical safety circle pitch, the center-to-center distance between any two pins shall not be less than the electrical safety circle pitch; The first pin is located in the central region of the coupler assembly; The second pin and the third pin are located on the first short side and the second short side of the coupler assembly, respectively. The center of the second pin and the center of the third pin are both located on the first circle, with the center of the first pin as the center and the electrical safety circle distance as the radius. The fourth and fifth pins are located outside the circles at two adjacent intersections of the first and second circles, respectively. The second circle has the center of the second pin as its center and the electrical safety circle distance as its radius. The sixth and seventh pins are located outside the circles at two adjacent intersections of the first and third circles, respectively. The third circle has the center of the third pin as its center and the electrical safety circle distance as its radius.

12. The food processor coupler assembly of claim 11, wherein, The first needle core, the second needle core, and the third needle core are located in a straight line.

13. A coupler assembly for a food processor, characterized by include: Male coupler with 7 pins; The female coupler is provided with a socket that mates with the pin; The electrical safety circle pitch, the center-to-center distance between any two pins shall not be less than the electrical safety circle pitch; The first pin is located in the central region of the coupler assembly; The second pin and the third pin are located on the first short side and the second short side of the coupler assembly, respectively. At least one of the pin centers is outside the circle adjacent to the first circle, and the other is on the first circle or outside the circle adjacent to the first circle. The first circle has the first pin center as its center and the electrical safety circle pitch as its radius. The fourth and fifth pins are located at two intersections of the first and second circles, respectively, or the fourth and fifth pins are located outside the circles at two adjacent intersections of the first and second circles, respectively. The second circle has the second pin center as its center and the electrical safety circle distance as its radius. The sixth and seventh pins are located at two intersections of the first and third circles, respectively, or at the outer edges of the circles at two adjacent intersections of the first and third circles, respectively. The third circle has the center of the third pin as its center and the electrical safety circle distance as its radius.

14. The food processor coupler assembly of claim 13, wherein, The first needle core, the second needle core, and the third needle core are located on the same straight line.

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