A spray device for a dishwasher

Abstract

The present invention discloses a spraying device for a dishwasher, which includes a water inlet assembly; a spraying fixing member rotatably connected to the water inlet assembly; a spraying arm connected to the spraying fixing member; and further includes a positioning portion disposed between the spraying fixing member and the spraying arm to realize the connection between the spraying fixing member and the spraying arm; a locking portion to prevent the spraying arm from loosening in connection with the spraying fixing member during operation. The positioning portion includes a boss disposed at the rotation center of the spraying arm and facing the side of the spraying fixing member; at least one first positioning unit disposed along the circumferential direction of the boss; and a second positioning unit disposed on the circumferential wall of the spraying fixing member corresponding to the first positioning unit. For the spraying device of a dishwasher according to the present invention, through the protruding structure on the outer edge of the spraying arm and the groove structure on the inner edge of the fixing member being embedded and rotatably snapped in, after rotation in place, the protruding structure around the reinforcing rib of the fixing member just snaps into the recessed structure on the outer edge of the water inlet of the spraying arm, thereby realizing the fixation of the spraying arm.

Description

Technical Field

[0001] The present invention belongs to the field of household appliances, and more particularly, relates to a spraying device for a dishwasher. Background Art

[0002] The existing top spraying device of a dishwasher generally includes water spraying holes or nozzles. The entire top spraying device is directly installed on the inner tank of the dishwasher by means of threaded connection. This installation method is not only complex in operation, inconvenient to install, not easy to disassemble and repair, but also cannot fully meet the water pressure resistance performance of the top spraying device. In addition, axial water spraying ports are generally provided in the axial direction of such a top spraying device, which easily causes local dead corners when washing dishes, cannot be thoroughly cleaned, and the cleaning effect is poor.

[0003] Currently, there are two common fixing methods. The first is to use fasteners to realize the connection and fixation of the spraying arm. The fasteners are connected to another spraying component by passing through the spraying arm. The second is to use the spraying arm components to be connected together by means of snap-fit. Generally, after the spraying components are assembled in a specific form, they can realize two-way rotation and mutual conversion of counterclockwise and clockwise spraying rotation.

[0004] Chinese Patent with Application No. CN201720342093.5 discloses a fixing structure for a dishwasher spraying device and a dishwasher with the fixing structure, including a fixing base and a fixing cap connected to a sink or a pump housing. The fixing base and the fixing cap are detachably connected. One end of the fixing cap away from the fixing base extends into the spraying device and is detachably connected to a diversion cap to fix the spraying device.

[0005] Chinese Patent with Application No. CN201320419822.4 discloses a connection structure for a dishwasher spraying arm and a dishwasher. The connection structure for the dishwasher spraying arm includes a spraying arm body composed of an upper spraying arm piece and a lower spraying arm piece, an inner water pipe, and a connection component for connecting the spraying arm body and the inner water pipe. The spraying arm connection end of the connection component extends into the spraying arm body and a diversion block is provided on the spraying arm connection end.

[0006] Although the above-mentioned prior arts solve the problem of the fixed connection of the dishwasher spraying arm to a certain extent, there are still problems such as being not conducive to long-term stable rotation, the fixing structure being unstable, the spraying arm flipping during work, resulting in fixing failure, the spraying arm falling off or loosening, affecting the normal operation of the dishwasher, etc.

[0007] Therefore, it is necessary to improve the deficiencies and defects of the prior art and provide a spraying device for a dishwasher. Through the convex structure on the outer edge of the spraying arm and the groove structure on the inner edge of the fixing part being embedded and rotatably snapped in, after rotation in place, the convex structure around the reinforcing rib of the fixing part just snaps into the concave structure on the outer edge of the water inlet of the spraying arm, thus realizing the fixation of the spraying arm.

[0008] In view of this, the present invention is specifically proposed. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a spraying device for a dishwasher that can overcome or at least partially solve the above problems.

[0010] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a spraying device for a dishwasher, including

[0011] a water inlet assembly;

[0012] a spraying fixing part rotatably connected to the water inlet assembly;

[0013] a spraying arm connected to the spraying fixing part;

[0014] It further includes a

[0015] positioning part arranged between the spraying fixing part and the spraying arm to realize the connection between the spraying fixing part and the spraying arm;

[0016] a locking part to prevent the spraying arm from loosening in the connection with the spraying fixing part during operation.

[0017] Among them, the positioning part includes

[0018] a boss arranged at the rotation center of the spraying arm and facing the spraying fixing part;

[0019] at least one first positioning unit arranged along the circumferential direction of the boss;

[0020] a second positioning unit arranged on the circumferential wall of the spraying fixing part corresponding to the first positioning unit.

[0021] In one embodiment, the

[0022] first positioning unit is a protrusion arranged along the circumferential direction of the boss;

[0023] The first positioning unit is that a bevel for facilitating the introduction of the first positioning unit is arranged on the side of the protrusion facing the spraying fixing part.

[0024] Furthermore, the

[0025] The second positioning unit extends along the axial direction of the spray fixing member on the circumferential wall of the spray fixing member, extending from the entry direction of the first positioning unit;

[0026] In one embodiment, when the extension depth can at least accommodate the first positioning unit, the second positioning unit extends along the circumferential direction of the spray fixing member for a distance that can at least accommodate the first positioning unit. In the fixing of the spray arm, an L-shaped second positioning unit is provided, such that after the first positioning unit of the spray arm enters the second positioning unit, its movement direction is greatly restricted, reducing the loosening phenomenon during operation, ensuring that after the spray arm is connected to the spray fixing member, it is stable and firm, and avoiding the problem of ineffective fixing of the spray arm.

[0027] Furthermore, the

[0028] The part of the second positioning unit extending in the circumferential direction of the spray fixing member penetrates through the circumferential wall of the spray fixing member;

[0029] In one embodiment, the boss is made of a material that can deform under pressure.

[0030] In addition, the locking portion includes

[0031] A first locking unit, which is connected to the circumferential wall of the spray fixing member and extends towards the side away from the spray fixing member;

[0032] A second locking unit, which is arranged on the first locking unit and faces the spray arm side;

[0033] The third locking unit is arranged on the side of the spray arm facing the spray fixing member and cooperates with the first locking unit to lock the spray arm to the spray fixing member.

[0034] And the

[0035] The first locking unit is at least two support rib-like structures that are connected to the circumferential wall of the spray fixing member and extend towards the side away from the spray fixing member;

[0036] In one embodiment, at least two first locking units extend in opposite directions in the same horizontal direction, which can well bear the reaction force generated by the spray arm during operation;

[0037] In one embodiment, the extension directions or the extension lines of the extension directions of at least two first locking units are perpendicular to each other in the same horizontal direction, which can well bear the reaction force generated by the spray arm during operation.

[0038] Further, the

[0039] The second locking unit is a protrusion arranged on the first locking unit and facing the spray arm side;

[0040] In one embodiment, a bevel groove facilitating import is provided on the protrusion to facilitate the import of the second locking unit.

[0041] In one embodiment, the orientation of the bevel groove is opposite to the circumferential extension direction of the second positioning unit on the spray fixing member. By setting the orientation of the bevel groove, corresponding acting forces are generated between the locking portion and the positioning portion, realizing the relaxation of the spray arm.

[0042] Furthermore, the third locking unit includes an arc-shaped groove provided on the spray arm and facing the side of the spray fixing member, and a groove provided in the arc-shaped groove corresponding to the second locking unit. The second locking unit can correspond to any fixed position, thereby realizing the relaxation of the spray arm and improving the safety of the device.

[0043] Still further, the trajectory formed by the connection of the arc-shaped grooves on the spray arm is the movement trajectory of the second locking unit when the spray fixing member rotates around the water inlet assembly.

[0044] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0045] 1. The present invention provides a corresponding fixing structure for the spray arm on the water inlet assembly. While realizing the fixing of the spray arm, it avoids the potential safety hazard problem caused by the loosening of the spray arm during normal operation, improving the safety and experience of user use.

[0046] 2. In the fixing of the spray arm, an L-shaped second positioning unit is provided, so that after the first positioning unit of the spray arm enters the second positioning unit, its movement direction is greatly restricted, reducing the loosening phenomenon during operation, ensuring that the spray arm is stable and firm after being connected to the spray fixing member, and avoiding the problem of the failure of the spray arm fixing.

[0047] 3. In the positioning portion, the boss of the spray arm is made of a material that can deform under pressure, further ensuring the stability of the spray arm fixing and further improving the safety of the overall device.

[0048] 4. The present invention provides a locking portion for preventing the spray arm from loosening during use. The locking portion cooperates with the positioning portion. By setting the orientation of the bevel groove, corresponding acting forces are generated between the locking portion and the positioning portion, realizing the relaxation of the spray arm.

[0049] 5. In the locking portion of the present invention, a third locking unit that can be set according to different installation directions of the spray arm is provided, and at the same time, a groove corresponding to any fixed position of the spray arm fixing is provided in the third locking unit, improving the flexibility of device use.

[0050] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. Description of the Drawings

[0051] The accompanying drawings, as part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention, but do not unduly limit the present invention. Obviously, the drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0052] In the drawings:

[0053] Figure 1 is an assembly schematic diagram of the spray device of the dishwasher of the present invention;

[0054] Figure 2 is a side schematic diagram of the assembly of the spray device of the dishwasher of the present invention;

[0055] Figure 3 is a structural schematic diagram of the spray fixing member of the present invention;

[0056] Figure 4 is a structural schematic diagram of the spray arm of the present invention;

[0057] Figure 5 is an enlarged schematic diagram of part A of the spray arm of the present invention.

[0058] In the figure: 1, spray arm; 2, spray fixing member; 3, water inlet assembly; 4, positioning part; 401, boss; 402, first positioning unit; 403, second positioning unit; 5, locking part; 501, first locking unit; 502, second locking unit; 503, third locking unit; 504, arc groove; 505, groove.

[0059] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Specific Embodiments

[0060] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0061] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0062] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] Figure 1 is an assembly schematic diagram of the spray device of the dishwasher of the present invention, mainly showing the relative positional relationship between the spray arm 1 and the water inlet assembly 3 of the present invention. As can be seen from Figure 1 it, the spray arm 1 described in the present invention has a structure of a spray arm 1 with four spray branches, but the present invention is not limited thereto, Figure 1 which is only shown as a special case;

[0064] Figure 2 is a side view schematic diagram of the assembly of the spray device of the dishwasher of the present invention, mainly showing the relative positional relationship between the spray arm 1, the spray fixing member 2 and the water inlet assembly 3 of the present invention. As can be seen from Figure 2 it, the spray fixing member 2 is arranged between the spray arm 1 and the water inlet assembly 3, which plays a role in connecting the spray arm 1 and rotatably connecting with the water inlet assembly 3;

[0065] Figure 3 is a schematic diagram of the structure of the spray fixing member 2 of the present invention, mainly showing the structure of the spray fixing member 2 described in the present invention, and showing the positional relationship between the first locking unit 501 and the second locking unit 502 in the locking part 5. The setting of three first locking units 501 is only a special case of the present invention;

[0066] Figure 4 is a schematic diagram of the structure of the spray arm 1 of the present invention, mainly showing the structure of the spray arm 1 described in the present invention, and showing the structure of the connection part between the spray arm 1 and the spray fixing member 2 from a bottom-up perspective;

[0067] Figure 5 is an enlarged schematic diagram of part A of the spray arm 1 of the present invention, mainly showing some structures of the positioning part 4 and the locking part 5 in the spray arm 1 of the present invention.

[0068] As shown Figures 1 to 5 in the figure, a spraying device of a dishwasher according to the present invention includes a water inlet assembly 3; a spraying fixing member 2 rotatably connected to the water inlet assembly 3; a spraying arm 1 connected to the spraying fixing member 2; the water inlet assembly 3. In the present invention, those skilled in the art can understand that the water inlet assembly 3 includes, but is not limited to, a water inlet pipe, a corresponding structure connected to the spraying fixing member 2, a bearing for the spraying fixing member 2 to rotate, a sealing structure for preventing washing liquid from overflowing, or also includes a water inlet supply device connected to the water inlet pipe. Further, the spraying device according to the present invention further includes a positioning portion 4 disposed between the spraying fixing member 2 and the spraying arm 1 to realize the connection between the spraying fixing member 2 and the spraying arm 1; a locking portion 5 for preventing the spraying arm 1 from loosening during operation. The positioning portion 4 and the locking portion 5 are respectively provided with partial components on the spraying fixing member 2 and the spraying arm 1. When the spraying fixing member 2 and the spraying arm 1 are installed and fixed, a complete positioning portion 4 and locking portion 5 are formed, thereby realizing the fixing and anti-loosening of the spraying arm 1 during the operation of the dishwasher.

[0069] As shown Figures 3 to 5 in the figure, the positioning portion 4 according to the present invention includes a boss 401 disposed at the rotation center of the spraying arm 1 and facing the spraying fixing member 2. Those skilled in the art can understand the boss 401 as a flange or a similar protruding structure disposed at the rotation center of the spraying arm 1, which is convenient for the spraying arm 1 to extend into the spraying fixing member 2, thereby realizing a fixed connection; at least one first positioning unit 402 disposed along the circumferential direction of the boss 401. A plurality of first positioning units 402 are disposed along the outer wall circumference of the boss 401. In the present invention, the first positioning units 402 are arranged at uniform intervals; corresponding to the first positioning units 402, a second positioning unit 403 is disposed on the circumferential wall of the spraying fixing member 2.

[0070] As shown Figures 3 to 5 in the figure, the locking portion 5 according to the present invention includes a first locking unit 501, a structure connected to the circumferential wall of the spraying fixing member 2 and extending away from the spraying fixing member 2. The first locking unit 501 extends outward on the circumferential wall, so that the force-bearing area of the locking is enlarged and the working radius is increased. In the case of unchanged moment of inertia, the locking force is increased, which can better avoid the loosening of the spraying arm 1 during operation; a second locking unit 502, a structure disposed on the first locking unit 501 and facing the spraying arm 1; a third locking unit 503 is disposed on the side of the spraying arm 1 facing the spraying fixing member 2 and cooperates with the first locking unit 501 to realize the locking of the spraying arm 1 and the spraying fixing member 2.

[0071] The present invention provides a corresponding fixing structure for the spray arm 1 on the water inlet assembly 3. While achieving the fixation of the spray arm 1, it avoids the potential safety hazards caused by the loosening of the spray arm 1 during normal operation, improving the safety and user experience. A locking portion 5 is provided to prevent the spray arm 1 from loosening during use. The locking portion 5 cooperates with the positioning portion 4. Through the setting of the groove orientation, a corresponding acting force is generated between the locking portion 5 and the positioning portion 4 to realize the relaxation of the spray arm 1.

[0072] Embodiment 1

[0073] As Figures 1 to 5 shown, a spray device for a dishwasher according to this embodiment includes a water inlet assembly 3; a spray fixing member 2 rotatably connected to the water inlet assembly 3; a spray arm 1 connected to the spray fixing member 2. In the present invention, those skilled in the art can understand that the water inlet assembly 3 includes, but is not limited to, a water inlet pipe, a corresponding structure connected to the spray fixing member 2, a bearing for the spray fixing member 2 to rotate, a sealing structure to prevent the overflow of washing liquid, or may also include a water supply device connected to the water inlet pipe. Further, the spray device of the present invention further includes a positioning portion 4 provided between the spray fixing member 2 and the spray arm 1 to realize the connection between the spray fixing member 2 and the spray arm 1; a locking portion 5 to prevent the spray arm 1 from loosening during operation. The positioning portion 4 and the locking portion 5 respectively set partial components on the spray fixing member 2 and the spray arm 1. When the spray fixing member 2 and the spray arm 1 are installed and fixed, a complete positioning portion 4 and locking portion 5 are formed, thereby realizing the fixation and anti-loosening of the spray arm 1 during the operation of the dishwasher. The present invention provides a corresponding fixing structure for the spray arm 1 on the water inlet assembly 3. While achieving the fixation of the spray arm 1, it avoids the potential safety hazards caused by the loosening of the spray arm 1 during normal operation, improving the safety and user experience.

[0074] Embodiment 2

[0075] As Figures 1 to 5 shown, this embodiment is a further limitation of the above Embodiment 1. A spray device for a dishwasher according to this embodiment, the positioning portion 4 includes a boss 401 provided at the rotation center of the spray arm 1 and facing the spray fixing member 2. Those skilled in the art can understand the boss 401 as a flange or a similar protruding structure provided at the rotation center of the spray arm 1, facilitating the spray arm 1 to extend into the spray fixing member 2 to realize a fixed connection; at least one first positioning unit 402 arranged along the circumferential direction of the boss 401. A plurality of first positioning units 402 are arranged along the outer wall circumference of the boss 401. In the present invention, the first positioning units 402 are arranged at uniform intervals; corresponding to the first positioning units 402, a second positioning unit 403 is provided on the circumferential wall of the spray fixing member 2.

[0076] Example 3

[0077] As Figures 1 to 5 shown, this embodiment is a further limitation of any one of the above-mentioned Embodiment 1 or Embodiment 2. For the dishwasher spraying device described in this embodiment, its first positioning unit 402 is a protrusion arranged along the circumferential direction of the boss 401. In the setting, the first positioning unit 402 can be arranged on the inner wall or the outer wall of the boss 401 according to specific circumstances. As Figure 4 shown, the first positioning unit 402 is arranged on the outer wall of the boss 401, but the technical solution of arranging it on the inner wall of the boss 401 should also be within the protection scope of the present invention.

[0078] Example 4

[0079] As Figures 1 to 5 shown, this embodiment is a further limitation of the above-mentioned Example 3. For a spraying device of a dishwasher described in this embodiment, its first positioning unit 402 is provided with a groove opening on the side facing the spraying fixing member 2 to facilitate the introduction of the first positioning unit 402. When the spraying arm 1 is inserted into the spraying fixing member 2, under the action of the groove opening, the first positioning unit 402 can better cooperate with the positioning part 4 on the spraying fixing member 2, facilitating the introduction and avoiding hard contact in the structure.

[0080] Example 5

[0081] As Figures 1 to 5 shown, this embodiment is a further limitation of any one of the above-mentioned Embodiments 1 to 4. The second positioning unit 403 described in this embodiment extends along the axial direction of the spraying fixing member 2 on the circumferential wall of the spraying fixing member 2 from the entering direction of the first positioning unit 402. As Figure 3 shown, in the axial direction of the spraying fixing member 2, the second positioning unit 403 forms a groove-shaped structure vertically downward. This groove-shaped structure is matched with the size of the first positioning unit 402 and can accommodate at least the first positioning unit 402 in width. When the extending depth can at least accommodate the first positioning unit 402, the second positioning unit 403 extends along the circumferential direction of the spraying fixing member 2 for a distance that can at least accommodate the first positioning unit 402. In the fixing of the spraying arm 1, an L-shaped second positioning unit 403 is provided, so that after the first positioning unit 402 of the spraying arm 1 enters the second positioning unit 403, its movement direction is greatly restricted, reducing the loosening phenomenon during the working process, ensuring that after the spraying arm 1 is connected to the spraying fixing member 2, it is stable and firm, and avoiding the problem of the fixing failure of the spraying arm 1.

[0082] Example 6

[0083] As Figure 3As shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiment 2 to Embodiment 5. In this embodiment, the portion of the second positioning unit 403 extending circumferentially around the spray fixing member 2 penetrates through the circumferential wall of the spray fixing member 2. When the first positioning unit 402 and the second positioning unit 403 are connected, the first positioning unit 402 extends out from the penetrated opening to form a structure similar to a buckle, realizing the connection between the spray arm 1 and the spray fixing member 2, making the spray arm 1 and the spray fixing member 2 form an integral body, and realizing the rotary spraying operation of the spray arm 1.

[0084] Embodiment 7

[0085] As Figure 3 shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiment 2 to Embodiment 6. In this embodiment, the boss 401 is made of a material that can deform under pressure. In the positioning portion 4, the boss 401 of the spray arm 1 is set to have a structure made of a material that can deform under pressure, further ensuring the stability of the fixing of the spray arm 1 and further improving the safety of the overall device.

[0086] Embodiment 8

[0087] As Figures 1 to 5 shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiment 1 to Embodiment 7. In this embodiment, for a spray device of a dishwasher, the locking portion 5 includes a first locking unit 501, which is connected to the circumferential wall of the spray fixing member 2 and extends toward the side away from the spray fixing member 2. The first locking unit 501 extends outward on the circumferential wall, so that the force-bearing area of the locking is enlarged and the working radius is increased. Without changing the moment of inertia, the locking force is increased, which can better avoid the loosening of the spray arm 1 during the working process; a second locking unit 502, which is a structure disposed on the first locking unit 501 toward the spray arm 1; a third locking unit 503 is disposed on the side of the spray arm 1 facing the spray fixing member 2 and cooperates with the first locking unit 501 to realize the locking of the spray arm 1 and the spray fixing member 2. The present invention provides a locking portion 5 for avoiding the loosening of the spray arm 1 during use. The locking portion 5 cooperates with the positioning portion 4. Through the setting of the groove direction, the locking portion 5 and the positioning portion 4 generate corresponding acting forces to realize the relaxation of the spray arm 1.

[0088] Embodiment 9

[0089] As Figures 1 to 5 shown in the figure, this embodiment is a further limitation of any one of the above-mentioned Embodiment 1 to Embodiment 8. In this embodiment, for a spray device of a dishwasher, the first locking unit 501 is at least two support rib-like structures that are connected to the circumferential wall of the spray fixing member 2 and extend toward the side away from the spray fixing member 2.

[0090] Example Ten

[0091] As Figures 1 to 5 shown, this embodiment is a further limitation of any one of the above-mentioned Embodiments 1 to 9. For a spray device of a dishwasher described in this embodiment, at least two first locking units 501 are arranged in the same horizontal direction and extend in opposite directions, which can well bear the reaction force generated during the operation of the spray arm 1.

[0092] Example Eleven

[0093] As Figures 1 to 5 shown, this embodiment is a further limitation of any one of the above-mentioned Embodiments 1 to 10. For a spray device of a dishwasher described in this embodiment, the extending directions or the extension lines of the extending directions of at least two first locking units 501 are perpendicular to each other in the same horizontal direction, which can well bear the reaction force generated during the operation of the spray arm 1.

[0094] Example Twelve

[0095] As Figures 1 to 5 shown, this embodiment is a further limitation of any one of the above-mentioned Embodiments 1 to 11. For a spray device of a dishwasher described in this embodiment, the second locking unit 502 is a protrusion provided on the first locking unit 501 and facing the side of the spray arm 1. Further, a groove for easy introduction is provided on the protrusion to facilitate the introduction of the second locking unit 502. When the second locking unit 502 is connected to the third locking unit 503, the groove facilitates the insertion of the second locking unit 502. Under the action of the groove, the connection and cooperation between the second locking unit 502 and the third locking unit 503 are easier, and hard contact in the structure is avoided while facilitating the introduction.

[0096] Example Thirteen

[0097] As Figures 1 to 5 shown, this embodiment is a further limitation of any one of the above-mentioned Embodiments 1 to 12. For a spray device of a dishwasher described in this embodiment, the orientation of the groove is in the opposite direction of the circumferential extension of the second positioning unit 403 around the spray fixing member 2. Through the setting of the groove orientation, a corresponding acting force is generated between the locking portion 5 and the positioning portion 4, realizing the relaxation of the spray arm 1.

[0098] Example Fourteen

[0099] As Figures 1 to 5As shown in the figure, this embodiment further defines any one of the above-mentioned Embodiments 1 to 13. For a spray device of a dishwasher described in this embodiment, the third locking unit 503 thereof includes an arc-shaped groove 504 provided on the spray arm 1 and facing the spray fixing member 2, and a groove 505 provided in the arc-shaped groove 504 corresponding to the second locking unit 502. The second locking unit 502 can correspond to any fixed position, thereby realizing the relaxation of the spray arm 1 and improving the safety of the device.

[0100] Embodiment Fifteen

[0101] As Figures 1 to 5 shown in the figure, this embodiment further defines any one of the above-mentioned Embodiments 1 to 14. For a spray device of a dishwasher described in this embodiment, the trajectory formed by the connection of the arc-shaped grooves 504 on the spray arm 1 is the movement trajectory of the second locking unit 502 when the spray fixing member 2 rotates around the water inlet assembly 3. From Figure 4 and Figure 5 it can be seen that the third locking unit 503 is an arc formed by branching around four spray arms 1. Although it is only reflected on the four branches, those skilled in the art should understand that this setting is a concentric arc, and the groove 505 is provided in one of the arc-shaped grooves 504 to form a locking structure in cooperation with the second locking unit 502, realizing the locking of the spray arm 1 and the spray fixing member 2 during the working process, thereby preventing loosening.

[0102] In the specification provided here, a large number of specific details are described. However, it can be understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0103] Similarly, it should be understood that in order to streamline this disclosure and help understand one or more of the various inventive aspects, in the above description of the exemplary embodiments of the present invention, the various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, the disclosed method should not be construed as reflecting the intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, the inventive aspects lie in less than all the features of the single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into the detailed description, where each claim itself serves as a separate embodiment of the present invention.

[0104] All features disclosed in this specification (including the accompanying claims, abstract and drawings), and all processes or units of any method or device so disclosed, may be combined in any combination, except that at least some of such features and / or processes or units are mutually exclusive. Each feature disclosed in this specification (including the accompanying claims, abstract and drawings) may be replaced by an alternative feature serving the same, equivalent or similar purpose, unless expressly stated otherwise.

[0105] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not others, combinations of features of different embodiments are meant to be within the scope of the present invention and form different embodiments. For example, in the following claims, any one of the claimed embodiments can be used in any combination.

[0106] It should be noted that the above embodiments illustrate rather than limit the present invention, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words may be interpreted as names.

[0107] The above are only preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above in preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, may make some modifications or refinements using the technical content prompted above to form equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and refinement made to the above embodiments based on the technical essence of the present invention, without departing from the content of the technical solution of the present invention, shall still be within the scope of the technical solution of the present invention.

Claims

1. A spray device for a dishwasher, comprising: Water inlet assembly (3); Spray fixing member (2) rotatably connected to the water inlet assembly (3); Spray arm (1) connected to the spray fixing member (2); Characterized in that: it further includes a positioning portion (4) disposed between the spray fixing member (2) and the spray arm (1) to realize the connection between the spray fixing member (2) and the spray arm (1); The positioning portion (4) includes: A boss (401) disposed at the rotation center of the spray arm (1) and facing the side of the spray fixing member (2); At least one first positioning unit (402) disposed along the circumferential direction of the boss (401); Corresponding to the first positioning unit (402), a second positioning unit (403) disposed on the circumferential wall of the spray fixing member (2); the second positioning unit (403) extends along the axial direction of the spray fixing member (2) on the circumferential wall of the spray fixing member (2) from the entry direction of the first positioning unit (402), and when the extension depth can at least accommodate the first positioning unit (402), the second positioning unit (403) extends along the circumferential direction of the spray fixing member (2) for a distance that can at least accommodate the first positioning unit (402); Locking portion (5) to prevent the spray arm (1) from loosening the connection with the spray fixing member (2) during operation; The locking portion (5) includes: A first locking unit (501), which is at least two support rib-like structures connected to the circumferential wall of the spray fixing member (2) and extending towards the side away from the spray fixing member (2); A second locking unit (502), which is a protrusion disposed on the first locking unit (501) and facing the side of the spray arm (1), and a bevel for easy introduction is provided on the protrusion, and the orientation of the bevel is opposite to the circumferential extension direction of the second positioning unit (403) on the spray fixing member (2); A third locking unit (503), which includes an arc-shaped groove (504) disposed on the spray arm (1) and facing the side of the spray fixing member (2) and a groove (505) disposed in the arc-shaped groove (504) corresponding to the second locking unit (502).

2. The spray device of a dishwasher according to claim 1, characterized in that: The first positioning unit (402) is a protrusion disposed along the circumferential direction of the boss (401).

3. The spray device of a dishwasher according to claim 2, characterized in that, A bevel for easy introduction of the first positioning unit (402) is provided on the side of the protrusion facing the spray fixing member (2).

4. The spray device of a dishwasher according to claim 1, characterized in that: The The circumferentially extending portion of the second positioning unit (403) penetrates through the circumferential wall of the spray fixing member (2).

5. The spray device of a dishwasher according to claim 4, characterized in that, The boss (401) is made of a material that can deform under pressure.

6. The spray device of a dishwasher according to claim 1, characterized in that: At least two first locking units (501) extend in opposite directions in the same horizontal direction.

7. The spray device of a dishwasher according to claim 6, characterized in that, The extending directions or the extension lines of the extending directions of at least two first locking units (501) in the same horizontal direction are perpendicular to each other.

8. The spray device of a dishwasher according to claim 1, wherein: The trajectory formed by the connection of the arc-shaped grooves (504) on the spray arm (1) is the movement trajectory of the second locking unit (502) when the spray fixing member (2) rotates around the water inlet assembly (3).

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