A spray arm and a dishwasher having the same

Abstract

The present application relates to a kind of spray arm and dishwasher, including body, the middle part of body has water collecting cavity and both sides have flow passage respectively, centrifugal impeller is installed in water collecting cavity, the top surface of body corresponding to each flow passage is formed water spraying surface respectively, each water spraying surface is respectively arranged with spray hole, at least one side water spraying surface is respectively provided with first water spraying gear and second water spraying gear, further including vertical first switching hole of gear shift slider, the gear shift slider can be moved back and forth along the first water spraying gear and second water spraying gear, the gear shift slider is located in the state of any one water spraying gear, at least one first switching hole on the gear shift slider is communicated with corresponding spray hole up and down.The present application can change the position and / or number of actual water outlet spray hole by changing the position of gear shift slider on water spraying surface, and then can change the water spraying state of water spraying surface according to different cleaning requirements, which is beneficial to improve water head, reduce the power of water pump, and improve the versatility of spray arm.

Description

Technical Field

[0001] This invention relates to the field of dishwashers, and more particularly to a spray arm and a dishwasher having the spray arm. Background Technology

[0002] Traditional dishwashers have a fixed number and position of spray holes on their spray arms. For example, Chinese utility model patents ZL202121479019.0 (authorization announcement number CN215502869U) entitled "Spray Arm for Cleaning Machine and Cleaning Machine with the Spray Arm" and ZL201821612184.7 (authorization announcement number CN209172222U) entitled "A Sink Dishwasher". The design of fixed number and fixed position of spray holes will lead to the following problems: (1) The spray arm needs more holes to meet the cleaning needs during the cleaning process, which will increase the power requirements of the water pump; (2) All spray holes are working during the cleaning process, which will reduce the water flow head; (3) It reduces the versatility between the spray arm and the dish rack.

[0003] To address the aforementioned problems, Chinese utility model patent ZL202022220605.5 (authorization announcement number CN 213993496 U) discloses a spray arm, specifically disclosing the following: It includes a body with a flow channel, and the body has a first spray hole communicating with the flow channel. The key feature is that the body also has a second spray hole communicating with the flow channel, and this second spray hole is equipped with a nozzle assembly that opens when the water pressure is greater than a set value and closes when the water pressure is less than a set value. In this embodiment, the spray arm has a first spray hole and a second spray hole, and the second spray hole is equipped with a nozzle assembly that opens when the water pressure is greater than a set value and closes when the water pressure is less than a set value, thereby allowing the number of spray holes to be adjusted according to the water pressure, providing convenience for different detection procedures. This patent achieves the adjustment of the number of nozzles in actual operation by setting a first nozzle and a second nozzle that can be opened under different water pressures. However, in practical use, the water pressure is generally constant. Therefore, this patent still cannot solve the above-mentioned problems caused by the fixed number and fixed position of nozzles in the prior art. Summary of the Invention

[0004] The first technical problem to be solved by the present invention is to provide a spray arm that can change the water spray state under different cleaning modes, which is in contrast to the prior art.

[0005] The second technical problem to be solved by the present invention is to provide a dishwasher having the above-described spray arm, which is in contrast to the prior art.

[0006] The technical solution adopted by the present invention to solve the first technical problem mentioned above is as follows: a spray arm, comprising a body, a water collection cavity in the middle of the body and flow channels on both sides communicating with the water collection cavity, a centrifugal impeller installed in the water collection cavity, each flow channel extending along the length direction of the body, and the two sides of the water collection cavity communicating with the inlet of the corresponding flow channel through water outlets, the top surface of the body corresponding to each flow channel forming a spray surface, and each spray surface being provided with spray holes, characterized in that...

[0007] At least one side of the spray surface is provided with a first spray position and a second spray position located outside the first spray position along its length direction. It also includes a shift slider with a first switching hole vertically penetrating through it. The shift slider is slidably mounted on the top surface of the body along its length direction and can move back and forth along the first spray position and the second spray position. Furthermore, when the shift slider is in any spray position, at least one first switching hole on the shift slider is vertically connected to the corresponding spray hole.

[0008] Furthermore, when the shift slider is in the first water spray position, the number of first switching holes that communicate vertically with the spray nozzles on the first water spray position is different from the number of holes in the second water spray position. This allows for a better adjustment of the actual number of spray nozzles according to different cleaning requirements.

[0009] Furthermore, when the shift slider is in the first water spray setting, the shape of the array formed by the shift slider and the first switching holes that communicate vertically with the spray nozzles in the first water spray setting is different from that in the second water spray setting. This allows for better adjustment of the actual spray nozzle position according to different cleaning requirements.

[0010] Furthermore, one end of the shift slider near the middle of the main body is connected to the main body via a first return spring extending along the length of the main body. When the centrifugal impeller is rotating, the shift slider moves away from the middle of the main body along the length of the main body under the action of centrifugal force, while the first return spring is stretched, causing the shift slider to tend to move towards the middle of the main body. In this way, the shift slider can move back and forth between the first and second water spray positions without the need for a separate drive device.

[0011] Furthermore, it also includes a switching slider with a vertically penetrating second switching hole, and an auxiliary spray setting extending along the length of the body is also provided on the spray surface. The switching slider is slidably mounted on the auxiliary spray setting along the length of the body and can move back and forth along the auxiliary spray setting.

[0012] Furthermore, when the aforementioned shift slider is in the first or second water spray position, the different second switching holes on the shift slider are vertically connected to the different spray holes on the aforementioned auxiliary water spray position. This further enriches the variation patterns of the number and position of the spray holes on the actual water spray surface, thereby better meeting various cleaning needs.

[0013] Furthermore, the auxiliary water spray position is located outside the first water spray position and is arranged side by side with the second water spray position along the width direction of the body. When the shift slider is in the first water spray position, the shift slider is exposed; when the shift slider is in the second water spray position, the shift slider is located below the shift slider. The second switching hole on the shift slider, which communicates with the corresponding nozzle on the auxiliary water spray position, is vertically connected to the corresponding first switching hole on the shift slider. This ensures that the shift slider can move smoothly back and forth between the first and second water spray positions, and further enriches the variation patterns of the number and position of the nozzles actually spraying water on the spray surface.

[0014] Furthermore, a connecting rod extending along the length of the body is fixed to one side of the switching slider. A first channel and a second channel are respectively formed in the body. The first channel extends along the length of the body, while the second channel is formed by a downward-facing recess from the top surface of the body. The second channel is located between the first channel and the inlet of the flow channel and communicates with one end of the first channel.

[0015] A first switching button is vertically inserted into the second channel. A second return spring is sandwiched between the bottom end of the first switching button and the inner bottom surface of the second channel. The first end of the connecting rod and one side of the lower end of the first switching button have a first contact slope and a second contact slope, respectively, and the two contact slopes always abut against each other. The third return spring is sandwiched between the second end of the connecting rod and the inner end face of the first channel.

[0016] When the shift slider is in the first water spray position, both the second and third return springs are in their initial state. The upper end of the first switching button is exposed in the second channel. When the shift slider is in the second water spray position, the upper end of the first switching button is pressed into the second channel against the bottom surface of the shift slider. The second return spring is compressed, causing the first switching button to tend to move upwards, while the third return spring is compressed, causing the connecting rod to tend to move towards its first end. In this way, the movement of the shift slider synchronously drives the movement of the switching slider.

[0017] Furthermore, it also includes a locking structure for locking the aforementioned shift slider in the first or second spray position. This allows the spray arm to operate stably in the first or second spray position.

[0018] Furthermore, the locking structure includes two locking pins corresponding one-to-one with the first and second water spray positions. Each locking pin is vertically mounted on the top wall of the main body, and the bottom surface of the shift slider is recessed with a locking groove for the upper end of each locking pin to be inserted and locked. Thus, the engagement of the locking pins with the locking grooves on the shift slider allows the shift slider to be locked in either the first or second water spray position.

[0019] Furthermore, the top wall of the main body has vertically downward-facing mounting holes corresponding to the aforementioned locking pins, allowing each locking pin to pass through. Each locking pin can move up and down within its corresponding mounting hole. Each locking pin is fitted with a fourth return spring. When the upper end of each locking pin is pressed into its corresponding mounting hole, the fourth return spring is compressed and supports the corresponding locking pin, thereby ensuring that each locking pin is stably positioned within its corresponding mounting hole.

[0020] Of the two aforementioned locking pins, the top surface of the pin closest to the middle of the main body slopes downwards from the inside to the outside on both sides along the length of the main body. For the other locking pin, the top surface of the pin closest to the middle of the main body slopes downwards from the inside to the outside on one side along the length of the main body, while the other side is at a right angle.

[0021] The top surface of the aforementioned lock groove forms a first limiting plane that abuts against the top surface of each lock pin. The side of the lock groove furthest from the center of the body is right-angled, and the edge of the groove opening on this side slopes downwards from the inside to the outside along the length of the body, forming a first pressing slope. The groove surface on the other side of the lock groove slopes downwards from the inside to the outside, forming a second pressing slope. Each pressing slope, through its interaction with the slope on the top surface of each lock pin, drives the corresponding lock pin to move downwards along its mounting hole.

[0022] Furthermore, each of the aforementioned mounting channels has a limiting seat below the corresponding locking pin for vertically limiting the locking pin, and a fifth return spring is provided at the bottom of the limiting seat. This fifth return spring ensures that the limiting seat always tends to move upwards to limit the locking pin. In this way, by limiting the corresponding locking pin upwards, the locking pin can be stably abutted against the first limiting plane of the locking groove, thereby ensuring that the shift slider is stably locked in the first water spray position or the second water spray position.

[0023] Furthermore, it also includes an unlocking mechanism for unlocking the aforementioned locking structure. This unlocking mechanism is disposed within the flow channel and includes an unlocking slider and an unlocking push rod. The unlocking slider is positioned at the inlet of the flow channel along the width direction of the body and can move back and forth along the width direction of the body under the drive of the water flow from the outlet of the water collection chamber. The unlocking push rod is positioned along the length direction of the body and can move back and forth synchronously along the length direction of the body under the action of the unlocking slider. The unlocking push rod has protruding unlocking push blocks corresponding to each locking pin.

[0024] When the aforementioned shift slider is locked in one of the water spray positions, the lower end of the locking pin corresponding to that water spray position is vertically limited by its corresponding limiting seat. When the aforementioned unlock slider moves, the aforementioned unlock push rod moves away from the center of the body and pushes down on the aforementioned limiting seat, causing the limiting seat to disengage from the lower end of the corresponding locking pin. The aforementioned shift slider is unlocked and moves to another water spray position under the action of centrifugal force or the elastic force of the first return spring. The aforementioned centrifugal impeller rotates, causing the water flow at the outlet to change direction. The unlock slider moves in another direction, causing the aforementioned unlock push rod to move towards the center of the body and disengage from each limiting seat. Each limiting seat moves upward and relocks the corresponding locking pin. The upper end of the corresponding locking pin is inserted into the locking groove of the aforementioned shift slider. By utilizing the interaction between the unlocking push block on the unlocking push rod and the corresponding limit seat, the upward upper limit effect of the limit seat on the corresponding locking pin can be released, thereby allowing the locking pin to move smoothly up and down along the mounting hole, thus unlocking the shift slider. Furthermore, the switching between locking and unlocking actions does not require a separate drive device; it is only necessary to change the rotation direction of the centrifugal impeller.

[0025] Furthermore, a spring-loaded latch for laterally limiting the locking pin is horizontally arranged below the corresponding locking pin in the mounting channel away from the middle of the main body, and a first limiting protrusion is provided at the bottom of the spring-loaded latch, while a second limiting protrusion is provided at the top of the unlocking push block corresponding to the limiting seat.

[0026] A second limiting plane is continuously provided along the length direction of the body on the bottom surface of the aforementioned shift slider, outside the second pressing inclined surface, and a third limiting plane is continuously provided on the inner side of the second pressing inclined surface. The third limiting plane is lower than the second limiting plane. A third pressing inclined surface and a fourth pressing inclined surface are respectively provided at the inner and outer ends of the bottom surface of the shift slider. The third pressing inclined surface is continuously provided with the third limiting plane and slopes outward from top to bottom, while the fourth pressing inclined surface is continuously provided with the second limiting plane and slopes inward from top to bottom.

[0027] With the shift slider locked in the second water spray position, it moves away from the center of the body under the action of centrifugal force. The top surface of the corresponding locking pin abuts against the third limiting plane. The locking pin moves down and is limited in the spring buckle. The centrifugal impeller stops rotating. The shift slider moves to the first water spray position under the action of the elastic force of the first return spring. Each unlocking push block disengages from the corresponding limiting seat, causing the second limiting protrusion to drive the spring buckle to disengage from the corresponding locking pin through the first limiting protrusion. The centrifugal impeller rotates, causing each limiting seat to abut against the corresponding limiting seat. The spring-loaded latch can temporarily lock the locking pin, which is far from the center of the main body, in the mounting hole, thereby unlocking the shift slider from the second water spray position. Under the elastic force of the first return spring, it returns to the first water spray position. Then, under the action of centrifugal force, each unlocking push block on the push rod abuts against the corresponding limiting seat again, and the shift slider is locked in the first water spray position. At the same time, the second limiting protrusion on the unlocking push block corresponding to the limiting seat far from the center of the main body pulls the first limiting protrusion on the spring-loaded latch, and the spring-loaded latch disengages from the corresponding limiting seat, so that the limiting pin re-limits the corresponding locking pin.

[0028] Furthermore, the unlocking slider is linked to the unlocking push rod via a transmission mechanism. This transmission mechanism includes a first transmission rack fixed to the unlocking slider, a second transmission rack fixed to the unlocking push rod, a first transmission gear set, and a second transmission gear set. The first transmission rack extends along the width direction of the body, and the second transmission rack extends along the length direction of the body. The first transmission gear set is arranged along the length direction of the body and includes a first cylindrical gear and a first bevel gear arranged coaxially. The second transmission gear set is arranged vertically and includes a second cylindrical gear and a second bevel gear arranged coaxially. The first cylindrical gear meshes with the first transmission rack, and the second cylindrical gear meshes with the second transmission rack. The first bevel gear and the second bevel gear mesh with each other. This allows the back-and-forth movement of the unlocking slider along the width direction of the body to smoothly drive the back-and-forth movement of the unlocking push rod along the length direction of the body.

[0029] Furthermore, the cavity wall of the water collection chamber includes a first sidewall extending along the width direction of the body and disposed in the middle of the width direction of the body. A first water outlet and a second water outlet of the water collection chamber are formed on both sides of the first sidewall, respectively. The inlet of the flow channel is opposite to the first sidewall, and an installation gap extending along the width direction of the body is left between the inlet of the flow channel and the first sidewall. The aforementioned unlocking slider is disposed in this installation gap.

[0030] Furthermore, when the centrifugal impeller is not rotating, the unlocking slider faces the first sidewall and closes the inlet of the flow channel. When the centrifugal impeller rotates clockwise, the unlocking slider moves to one end along the width of the body, opening and connecting both the first outlet and the inlet. When the centrifugal impeller rotates counterclockwise, the unlocking slider moves to the other end along the width of the body, opening and connecting both the second outlet and the inlet. In this way, by changing the rotation direction of the centrifugal impeller, the water flow direction at the outlet is changed, thereby driving the unlocking slider to move back and forth along the width of the body.

[0031] Furthermore, the first sidewall has a recessed sliding groove extending along the width direction of the body on its outer surface relative to the water collection cavity, while the corresponding side of the unlocking push block has a protruding sliding protrusion. This sliding protrusion is fitted into the sliding groove and can move back and forth along it. A sixth return spring is respectively clamped between the two ends of the sliding protrusion along the width direction of the body and the corresponding side of the sliding groove. When the sliding protrusion moves to any end, the corresponding sixth return spring causes the unlocking slider to tend to move to face the first sidewall. This allows the unlocking slider to move back and forth more smoothly along the width direction of the body.

[0032] The technical solution adopted to further solve the second technical problem mentioned above is: a dishwasher, characterized in that it has a spray arm as described above.

[0033] Compared with the prior art, the advantages of the present invention are as follows: the spray surface of the spray arm has a first spray level and a second spray level, and the shift slider can move back and forth along the first and second spray levels. When the shift slider is in any spray level, at least one first switching hole on the shift slider is vertically connected to the corresponding spray hole. In this way, by changing the position of the shift slider on the spray surface, the position and / or number of actual water outlet spray holes can be changed, thereby changing the spray state of the spray surface according to different cleaning requirements. This is beneficial for increasing water flow head, reducing water pump power, and improving the versatility of the spray arm. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the spray arm in an embodiment of the present invention;

[0035] Figure 2 for Figure 1 A schematic diagram of the structure from another direction;

[0036] Figure 3 for Figure 1 A structural diagram from another direction;

[0037] Figure 4 for Figure 1 A structural diagram from another direction;

[0038] Figure 5 for Figure 4 A cross-sectional view along the AA direction;

[0039] Figure 6 This is a partial exploded view of the spray arm in an embodiment of the present invention;

[0040] Figure 7 for Figure 3 A cross-sectional view along the BB direction;

[0041] Figure 8 for Figure 3 A sectional view along the CC direction;

[0042] Figure 9 for Figure 3 Cross-sectional view along the DD direction;

[0043] Figure 10 This is a partial structural diagram of the spray arm in an embodiment of the present invention;

[0044] Figure 11 This is a schematic diagram of the shift slider in an embodiment of the present invention;

[0045] Figure 12 This is a schematic diagram of the switching slider in an embodiment of the present invention;

[0046] Figure 13 for Figure 9 Enlarged view of part e in the middle;

[0047] Figure 14 for Figure 9 Enlarged view of part f in the middle;

[0048] Figure 15 for Figure 9 A magnified view of part g in the middle. Detailed Implementation

[0049] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0050] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0051] like Figures 1-15 As shown, a dishwasher includes a spray arm, which comprises a body 1. The body 1 has a water collection chamber 11 in the middle and flow channels 12 on both sides communicating with the water collection chamber 11. A centrifugal impeller 2 is installed in the water collection chamber 11. Each flow channel 12 extends along the length of the body 1, and each side of the water collection chamber 11 is connected to the inlet 121 of the corresponding flow channel 12 through a water outlet 112. The top surface of the body 1 corresponding to each flow channel 12 forms a spray surface 13, and each spray surface 13 is provided with spray holes 14. The bottom of the body 1 has a water inlet 113 communicating with the water collection chamber 11.

[0052] Furthermore, one of the spray surfaces 13 on one side is provided with a first spray setting 131 and a second spray setting 132 located outside the first spray setting 131 along its length direction. It also includes a shift slider 3 with a vertically penetrating first switching hole 30. The shift slider 3 is slidably mounted on the top surface of the body 1 along its length direction and can move back and forth along the first spray setting 131 and the second spray setting 132. Furthermore, when the shift slider 3 is in any spray setting, at least one of the first switching holes 30 on the shift slider 3 is vertically connected to the corresponding spray hole 14. In this invention, the spray surface 13 of the spray arm has a first spray setting 131 and a second spray setting 132. The shift slider 3 can move back and forth along the first spray setting 131 and the second spray setting 132. When the shift slider 3 is in any spray setting, at least one first switching hole 30 on the shift slider 3 is vertically connected to the corresponding spray hole 14. By changing the position of the shift slider 33 on the spray surface 13, the position and / or number of the actual water-discharging spray holes 14 can be changed, thereby changing the spray state of the spray surface 13 according to different cleaning requirements. This is beneficial for increasing the water flow head, reducing the power of the water pump, and improving the versatility of the spray arm. In this embodiment, the first spray setting 131 and the second spray setting 132 are only provided on the spray surface 13 on one side of the main body 1. Of course, they can also be provided on both sides of the spray surface 13.

[0053] Preferably, when the shift slider 3 is in the first water spray position 131, the number of the first switching holes 30 communicating vertically with the spray holes 14 on the first water spray position 131 is different from the number in the second water spray position 132. This allows for better adjustment of the actual number of spray holes 14 according to different cleaning requirements. Simultaneously, when the shift slider 3 is in the first water spray position 131, the shape of the array formed by the arrangement of the first switching holes 30 communicating vertically with the spray holes 14 on the first water spray position 131 is different from the shape in the second water spray position 132. This allows for better adjustment of the position of the actual spray holes 14 according to different cleaning requirements.

[0054] Furthermore, to enable the shift slider 3 to move back and forth along the first water spray level 131 and the second water spray level 132, in this embodiment, one end of the shift slider 3 near the middle of the body 1 is connected to the body 1 via a first return spring a extending along the length direction of the body 1. Specifically, the inner end of the shift slider 3 has mounting holes 39 on both sides along the length direction, and the first return spring a is installed in each mounting hole 39. When the centrifugal impeller 2 is rotating, the shift slider 3 moves away from the middle of the body 1 along the length direction of the body 1 under the action of centrifugal force, while the first return spring a is stretched, causing the shift slider 3 to tend to move towards the middle of the body 1. In this way, the shift slider 3 can move back and forth along the first water spray level 131 and the second water spray level 132 without the need for a separate drive device.

[0055] Furthermore, it also includes a switching slider 4 with a vertically penetrating second switching hole 40. The water spray surface 13 is also provided with an auxiliary water spray setting 133 extending along the length direction of the body 1. The switching slider 4 is slidably mounted on the auxiliary water spray setting 133 along the length direction of the body 1 and can move back and forth along the auxiliary water spray setting 133. Furthermore, when the switching slider 3 is in the first water spray setting 131 or the second water spray setting 132, the different second switching holes 40 on the switching slider 4 are vertically connected to the different spray holes 14 on the auxiliary water spray setting 133. This further enriches the variation patterns of the number and position of the spray holes 14 actually spraying water from the water spray surface 13, thereby better meeting various cleaning needs. Preferably, the auxiliary water spray position 133 is located outside the first water spray position 131 and is arranged side by side with the second water spray position 132 along the width direction of the body 1. When the shift slider 3 is in the first water spray position 131, the switching slider 4 is exposed. When the shift slider 3 is in the second water spray position 132, the switching slider 4 is located below the shift slider 3. The second switching hole 40 of the switching slider 4, which communicates with the corresponding spray hole 14 on the auxiliary water spray position 133, is vertically connected to the corresponding first switching hole 30 on the shift slider 3. This ensures that the shift slider 3 can move smoothly back and forth between the first water spray position 131 and the second water spray position 132, and further enriches the variation patterns of the number and position of the spray holes 14 of the actual water spray from the water spray surface 13. In this embodiment, the switching slider 4 has two second switching holes 40 along the length of the body 1, and the auxiliary water spray position 133 has two spray holes 14 spaced apart along the length of the body 1. When the shift slider 3 is in the first water spray position 131, one of the second switching holes 40 of the switching slider 4 is vertically connected to one of the spray holes 14 on the auxiliary water spray position 133. When the shift slider 3 is in the second water spray position 132, the other second switching hole 40 of the switching slider 4 is vertically connected to the other spray hole 14 on the auxiliary water spray position 133.

[0056] Furthermore, a connecting rod 41 extending along the length of the body 1 is fixed to one side of the aforementioned switching slider 4. The body 1 has a first channel 101 and a second channel 102 respectively. The first channel 101 extends along the length of the body 1, while the second channel 102 is formed by a downward-facing recess from the top surface of the body 1. The second channel 102 is located between the first channel 101 and the inlet 121 of the flow channel 12 and communicates with one end of the first channel 101. A first switching button 42 is vertically inserted into the second channel 102. A second return spring b is sandwiched between the bottom end of the first switching button 42 and the inner bottom surface of the second channel 102. The first end of the connecting rod 41 and one side of the lower end of the first switching button 42 respectively have a first contact slope 411 and a second contact slope 421, and the two contact slopes always abut against each other. A third return spring c is sandwiched between the second end of the connecting rod 41 and the inner end face of the first channel 101. When the shift slider 3 is in the first water spray position 131, both the second return spring b and the third return spring c are in their initial state. The upper end of the first switching button 42 is exposed in the second channel 102. When the shift slider 3 is in the second water spray position 132, the upper end of the first switching button 42 is pressed into the second channel 102 by the bottom surface of the shift slider 3. The second return spring b is compressed, causing the first switching button 42 to tend to move upwards, while the third return spring c is compressed, causing the connecting rod 41 to tend to move towards its first end. In this way, the movement of the shift slider 33 can synchronously drive the movement of the switching slider 4.

[0057] Furthermore, it also includes a locking structure 5 for locking the shift slider 3 in the first spray position 131 or the second spray position 132, thereby enabling the spray arm to work stably in the first spray position 131 or the second spray position 132. Specifically, the locking structure 5 includes two locking pins 51 corresponding one-to-one with the first spray position 131 and the second spray position 132. Each locking pin 51 is vertically arranged on the top wall of the main body 1, and the bottom surface of the shift slider 3 is recessed with a locking groove 31 for the upper end of each locking pin 51 to be inserted and locked. In this way, the shift slider 3 can be locked in the first spray position 131 or the second spray position 132 through the cooperation of each locking pin 51 and the locking groove 31 on the shift slider 3.

[0058] Furthermore, the top wall of the aforementioned body 1 has vertically downward-facing mounting holes 103 corresponding to the aforementioned locking pins 51, allowing each locking pin 51 to pass through. Each locking pin 51 can move up and down within its corresponding mounting hole 103. Each locking pin 51 is fitted with a fourth return spring d. When the upper end of each locking pin 51 is pressed into its corresponding mounting hole 103, the fourth return spring d is compressed and supports the corresponding locking pin 51, thereby ensuring that each locking pin 51 is stably positioned within its corresponding mounting hole 103. Of the two aforementioned locking pins 51, the top surface of the locking pin 51 adjacent to the middle of the aforementioned body 1 slopes downward from the inside to the outside on both sides along the length of the body 1 (referred to as the first inclined surface 511 and the second inclined surface 512, respectively). Of the other locking pin 51, the top surface of the locking pin 51 adjacent to the middle of the body 1 slopes downward from the inside to the outside on one side along the length of the body 1 (referred to as the third inclined surface 513), while the other side is at a right angle. The top surface of the aforementioned lock groove 31 forms a first limiting plane 311 that abuts against the top surface of each lock pin 51. The side of the lock groove 31 furthest from the center of the body 1 is at a right angle, and the edge of the groove opening on this side slopes downwards from the inside to the outside along the length of the body 1 to form a first pressing slope 32. The groove surface on the other side of the lock groove 31 slopes downwards from the inside to the outside to form a second pressing slope 33. Each pressing slope, through its interaction with the slope on the top surface of each lock pin 51, drives the corresponding lock pin 51 to move downwards along its mounting channel 103. Furthermore, each mounting channel 103 has a limiting seat 52 below the corresponding lock pin 51 for vertically limiting the lock pin 51. A fifth return spring e is provided at the bottom of the limiting seat 52, ensuring that the limiting seat 52 always tends to move upwards to limit the lock pin 51. In this way, by positioning the locking pin 51 corresponding to the upper limit of the limiting seat 52, the locking pin 51 can be stably abutted against the first limiting plane 311 of the locking groove 31, thereby allowing the shift slider 33 to be stably locked in the first spray position 131 or the second spray position 132. In this embodiment, specifically, each limiting seat 52 has a vertically extending limiting pin 520 at its top, and each locking pin 51 has a vertically extending limiting groove 510 at its bottom for the corresponding limiting pin to be inserted. When the limiting pin 520 on the limiting seat 52 is inserted into the limiting groove 510, the corresponding locking pin 51 is positioned upwards to the upper limit, preventing the locking pin 51 from moving downwards, and allowing it to be stably locked in the locking groove 31 on the shift slider 3.

[0059] Furthermore, it also includes an unlocking mechanism 6 for unlocking the aforementioned locking structure 5. The unlocking mechanism 6 is disposed in the aforementioned flow channel 12 and includes an unlocking slider 61 and an unlocking push rod 62. The unlocking slider 61 is disposed at the inlet 121 of the flow channel 12 along the width direction of the body 1 and can move back and forth along the width direction of the body 1 under the drive of the water flow from the outlet 112 of the water collection chamber 11. The unlocking push rod 62 is disposed along the length direction of the body 1 and can move back and forth synchronously along the length direction of the body 1 under the drive of the unlocking slider 61. The unlocking push rod 62 is provided with an unlocking push block 621 corresponding to each locking pin 51. The first unlocking inclined surface 6211 on each unlocking push block 621 can interact with the second unlocking inclined surface 521 on the corresponding limiting seat 52. When the shift slider 3 is locked in one of the spray positions, the lower end of the locking pin 51 corresponding to that spray position is vertically limited by the corresponding limiting seat 52. When the unlocking slider 61 moves, the unlocking push rod 62 moves away from the middle of the body 1 and pushes the limiting seat 52 downward, causing the limiting seat 52 to disengage from the lower end of the corresponding locking pin 51. The shift slider 3 is unlocked and moves to another spray position under the action of centrifugal force or the elastic force of the first return spring a. The centrifugal impeller 2 turns, causing the water flow at the outlet 112 to change direction. The unlocking slider 61 moves in another direction, causing the unlocking push rod 62 to move towards the middle of the body 1 and disengage from each limiting seat 52. Each limiting seat 52 moves upward and relocks the corresponding locking pin 51. The upper end of the corresponding locking pin 51 is inserted into the locking groove 31 of the shift slider 3. The interaction between the unlocking push block 621 on the unlocking push rod 62 and the corresponding limiting seat 52 can release the limiting seat 52 from the upward limiting effect on the corresponding locking pin 51, thereby allowing the locking pin 51 to move smoothly up and down along the mounting hole 103, thus unlocking the shift slider 3. Furthermore, the switching between locking and unlocking actions does not require a separate drive device; it is only necessary to change the rotation direction of the centrifugal impeller 2.

[0060] Preferably, a spring buckle 53 is horizontally arranged below the corresponding locking pin 51 in the mounting channel 103 at the middle of the main body 1 to limit the corresponding limiting seat 52 and thus limit the locking pin 51. The bottom of the spring buckle 53 is provided with a first limiting protrusion 531, and the top of the unlocking push block 621 corresponding to the limiting seat 52 is provided with a second limiting protrusion 6211. The bottom surface of the shift slider 3 is provided with a second limiting plane 35 continuously on the outer side of the second pressing inclined surface 33 along the length direction of the body 1, and a third limiting plane 36 is continuously provided on the inner side of the second pressing inclined surface 33. The third limiting plane 36 is lower than the second limiting plane 35. The inner and outer ends of the bottom surface of the shift slider 3 are respectively provided with a third pressing inclined surface 37 and a fourth pressing inclined surface 38. The third pressing inclined surface 37 is continuously provided with the third limiting plane 36 and is inclined outward from top to bottom, while the fourth pressing inclined surface 38 is continuously provided with the second limiting plane 35 and is inclined inward from top to bottom. With the shift slider 3 locked in the second water spray position 132, it moves away from the center of the main body 1 under centrifugal force. The top surface of the corresponding locking pin 51 abuts against the third limiting plane 36. The locking pin 51 moves downward and pulls the spring buckle 53 inward through the inclined surface at the bottom. The spring buckle 53 locks the corresponding limiting seat 52, and the limiting seat 52 disengages from the locking pin 51. The centrifugal impeller 2 stops rotating, and the shift slider 3 moves to the first water spray position 131 under the elastic force of the first return spring a. Each unlocking push block 621 disengages from the corresponding limiting seat 52, causing the second limiting protrusion 6211 to push the spring buckle 53 away from the corresponding limiting pin 52 through the first limiting protrusion 531. Each limiting pin 52 then lowers to limit the corresponding locking pin 51 again. The spring clip 53 can temporarily lock the locking pin 51, which is away from the middle (i.e. the outer side) of the main body 1, in the mounting hole 103, thereby unlocking the shift slider 33 from the second water spray position 132 and returning it to the first water spray position 131 under the elastic force of the first return spring a. Then, under the action of centrifugal force, each unlocking push block 621 on the unlocking push rod 62 disengages from the corresponding limiting seat 52, and the shift slider 33 is locked in the first water spray position 131. At the same time, the second limiting protrusion 6211 on the unlocking push block 621 corresponding to the limiting seat 52 away from the middle of the main body 1 pushes the first limiting protrusion 531 on the spring clip 53, and the spring clip 53 disengages from the corresponding limiting seat 52, so that the limiting pin 521 re-limits the corresponding locking pin 51. In this embodiment, specifically, the aforementioned spring buckle 53 is a horizontally arranged plate. One end of the plate has a semi-circular latch, and the other end is connected to the main body through a spring structure. In the initial state, the spring buckle 53 is located on one side of the corresponding limiting post 521. When the corresponding locking post 51 moves down, the spring buckle 53 is forced to move towards the corresponding limiting post 521 and latches the limiting post 521.

[0061] Specifically, in this embodiment, the unlocking slider 61 is linked to the unlocking push rod 62 via a transmission mechanism 7. The transmission mechanism 7 includes a first transmission rack 71 fixed on the unlocking slider 61, a second transmission rack 72 fixed on the unlocking push rod 62, a first transmission gear set 73, and a second transmission gear set 74. The first transmission rack 71 extends along the width direction of the body 1, and the second transmission rack 72 extends along the length direction of the body 1. The first transmission gear set 73 is arranged along the length direction of the body 1 and includes a first cylindrical gear 731 and a first bevel gear 732 arranged coaxially. The second transmission gear set 74 is arranged vertically and includes a second cylindrical gear 741 and a second bevel gear 742 arranged coaxially. The first cylindrical gear 731 meshes with the first transmission rack 71, and the second cylindrical gear 741 meshes with the second transmission rack 72. The first bevel gear 732 meshes with the second bevel gear 742. This allows the unlocking slider 61 to move back and forth along the width of the body 1, which in turn smoothly drives the unlocking push rod 62 to move back and forth along the length of the body 1.

[0062] In this embodiment, preferably, to ensure that the shift slider 33 is more securely positioned in the corresponding water spray mode, preferably, two locking pins 51 are provided on both sides of the water spray surface 13 along its width direction. Correspondingly, the bottom surface of the shift slider 33 is provided with locking grooves 31 and first pressing inclined surfaces 32 at both ends along its width direction, and each locking pin 51 on each side can be locked in the corresponding locking groove 31. At the same time, there are also two unlocking push rods 62, each corresponding to one of the two locking pins 51 on each side. Each unlocking push rod 62 is linked to the unlocking slider 61 through the transmission mechanism 7.

[0063] Furthermore, in this embodiment, the cavity wall of the water collection cavity 11 includes a first side wall 111 extending along the width direction of the body 1 and disposed in the middle of the width direction of the body 1. The first outlet 1121 and the second outlet 1122 of the water collection cavity 11 are respectively formed on both sides of the first side wall 111 (that is, the outlet 112 includes the first outlet 1121 and the second outlet 1122). The inlet 121 of the flow channel 12 is opposite to the first side wall 111, and an installation gap extending along the width direction of the body 1 is left between the inlet 121 of the flow channel 12 and the first side wall 111. The unlocking slider 61 is disposed in the installation gap. Furthermore, when the centrifugal impeller 2 is not rotating, the unlocking slider 61 is aligned with the first sidewall 111 and closes the inlet 121 of the flow channel 12. When the centrifugal impeller 2 rotates clockwise, the unlocking slider 61 moves to one end along the width direction of the body 1, and both the first outlet and the inlet 121 open and connect. When the centrifugal impeller 2 rotates counterclockwise, the unlocking slider 61 moves to the other end along the width direction of the body 1, and both the second outlet and the inlet 121 open and connect. In this way, by changing the rotation direction of the centrifugal impeller 2, the water flow direction of the outlet 112 is changed, thereby driving the unlocking slider 61 to move back and forth along the width direction of the body 1. In this embodiment, to simplify the internal structure of the spray arm, the first sidewall 111, unlocking slider 61, and other structures are also provided at the flow channel 12 on the other side of the body 1 (without the first spray baffle 131 and the second spray baffle 132).

[0064] Furthermore, preferably, the first sidewall 111 is recessed on the outer surface of the water collection cavity 11, with a sliding groove 1111 extending along the width direction of the body 1. A sliding protrusion 611 protrudes from the corresponding side of the unlocking push block 6211. The sliding protrusion 611 is fitted into the sliding groove 1111 and can move back and forth along the groove. A sixth return spring f is respectively clamped between the two ends of the sliding protrusion 611 along the width direction of the body 1 and the corresponding side of the sliding groove 1111. When the sliding protrusion 611 is moved to any end, the corresponding sixth return spring f causes the unlocking slider 61 to tend to move to face the first sidewall 111. This allows the unlocking slider 61 to move back and forth more smoothly along the width direction of the body 1.

[0065] The working process of this invention is as follows:

[0066] In the initial state, the shift slider 33 is located at the first spray position 131 (locked state). To switch to the second spray position 132, the centrifugal impeller 2 is driven to rotate counterclockwise at a certain speed W1, and the spray arm rotates counterclockwise accordingly. At this time, the unlock slider 61 is driven by the transmission mechanism 7 to move the unlock push rod 62 along the length of the body 1. Each unlock push block 621 on the unlock push rod 62 presses against the corresponding limit seat 52, so both the inner and outer locking pins 51 are in the unlocked state. Under the action of centrifugal force, the shift slider 33 slides down to the outer locking pin 51 and locks with it. At the same time, the shift slider 33 also pushes the switching slider 4 to complete the switching between the second switching hole 40 and the spray hole 14. Then, the centrifugal impeller 2 is driven to rotate clockwise at the same speed, and the spray arm also rotates clockwise. At this time, the unlocking slider 61 is driven by the transmission mechanism 7 to move the unlocking push rod 62. Each unlocking push block 621 on the unlocking push rod 62 releases the corresponding limit seat 52, so the locking pins 51 at both the inner and outer ends are locked. At this time, the spray arm cleans in the actual spray state of the second spray setting 132.

[0067] At this time, if you want to switch the spray arm from the second spray position 132 to the first spray position 131, drive the centrifugal impeller 2 to rotate counterclockwise at a certain speed W2 (W2>W1). The spray arm also rotates counterclockwise, and both the inner and outer locking pins 51 are locked. At the same time, under the action of centrifugal force, the switching slider 4 continues to move away from the center of the spray arm relative to the second spray position 132. Then, the third limiting plane 36 of the shift slider 3 causes the outer locking pin 51 to move further downward and the corresponding limiting seat 52 to be locked in the spring buckle 53.

[0068] Next, the speed of the centrifugal impeller 2 is gradually reduced to 0. At this time, the shift slider 3 is no longer locked by the outer locking pin 51. Under the spring return force of the first return spring a, the shift slider 3 returns to the first spray position 131 and completes the engagement action with the inner locking pin 51. At the same time, as the spray arm stops rotating, the unlocking slider 61 returns to the position directly opposite the first side wall 111, driving the corresponding unlocking push block 621 on the unlocking push rod 62 to move the spring buckle 53, causing the outer limiting seat 52 to disengage from the spring buckle 53 and return to the pop-up state. Then, the centrifugal impeller 2 is driven to rotate clockwise, and the spray arm also rotates clockwise. At the same time, the inner and outer locking pins 51 are locked under the limiting action of the corresponding limiting seats 52, so the spray arm cleans in the spray state of the first spray position 131.

Claims

1. A spray arm comprising a body (1), wherein the body (1) has a water collection cavity (11) in the middle and flow channels (12) communicating with the water collection cavity (11) on both sides, wherein a centrifugal impeller (2) is installed in the water collection cavity (11), each flow channel (12) extends along the length direction of the body (1), and the two sides of the water collection cavity (11) are respectively connected to the corresponding flow channel (12) through water outlets (112), and the top surface of the body (1) corresponding to each flow channel (12) forms a spray surface (13), and each spray surface (13) is provided with spray holes (14), characterized in that, At least one side of the spray surface (13) is provided with a first spray position (131) and a second spray position (132) located outside the first spray position (131) along its length direction. It also includes a shift slider (3) with a first switching hole (30) vertically penetrating through it. The shift slider (3) is slidably installed on the top surface of the body (1) along the length direction of the body (1) and can move back and forth along the first spray position (131) and the second spray position (132). Furthermore, when the shift slider (3) is located at any spray position, at least one first switching hole (30) on the shift slider (3) is vertically connected to the corresponding spray hole (14). It also includes a switching slider (4) with a vertically penetrating second switching hole (40), and an auxiliary water spray position (133) extending along the length direction of the body (1) is also provided on the water spray surface (13). The switching slider (4) is slidably mounted on the auxiliary water spray position (133) along the length direction of the body (1) and can move back and forth along the auxiliary water spray position (133). Furthermore, when the aforementioned shift slider (3) is in the first water spray position (131) or the second water spray position (132), the different second switching holes (40) on the shift slider (4) are connected vertically to the different spray holes (14) on the aforementioned auxiliary water spray position (133). The auxiliary water spray position (133) is located outside the first water spray position (131) and is arranged side by side with the second water spray position (132) along the width direction of the body (1). When the shift slider (3) is in the first water spray position (131), the switching slider (4) is exposed. When the shift slider (3) is in the second water spray position (132), the switching slider (4) is located below the shift slider (3). The second switching hole (40) of the switching slider (4) communicates with the corresponding spray hole (14) on the auxiliary water spray position (133) and the corresponding first switching hole (30) on the shift slider (3) are vertically connected. A connecting rod (41) extending along the length of the body (1) is fixed to one side of the switching slider (4). The body (1) is provided with a first channel (101) and a second channel (102). The first channel (101) extends along the length of the body (1), while the second channel (102) is formed by a downward-facing recess on the top surface of the body (1). The second channel (102) is located between the first channel (101) and the inlet (121) of the flow channel (12) and communicates with one end of the first channel (101). A first switching button (42) is vertically inserted into the second channel (102). A second return spring (b) is sandwiched between the bottom end of the first switching button (42) and the inner bottom surface of the second channel (102). The first end of the connecting rod (41) and one side of the lower end of the first switching button (42) have a first contact slope (411) and a second contact slope (421) respectively, and the two contact slopes always abut against each other. A third return spring (c) is sandwiched between the second end of the connecting rod (41) and the inner end face of the first channel (101). When the shift slider (3) is in the first water spray position (131), the second return spring (b) and the third return spring (c) are both in the initial state. The upper end of the first switch button (42) is exposed in the second channel (102). When the shift slider (3) is in the second water spray position (132), the upper end of the first switch button (42) is pressed into the second channel (102) by the bottom surface of the shift slider (3). The second return spring (b) is compressed, causing the first switch button (42) to tend to move upward. The third return spring (c) is compressed, causing the connecting rod (41) to tend to move towards its first end.

2. The spray arm as described in claim 1, characterized in that, When the shift slider (3) is in the first water spray position (131), the number of the first switching holes (30) that are vertically connected to the spray holes (14) on the first water spray position (131) is different from the number of the first switching holes (30) when the shift slider (3) is in the second water spray position (132).

3. The spray arm as described in claim 2, characterized in that, When the shift slider (3) is in the first water spray position (131), the shape of the array formed by the shift slider (3) and the first switching hole (30) that communicates vertically with the spray hole (14) on the first water spray position (131) is different from the shape when it is in the second water spray position (132).

4. The spray arm as described in any one of claims 1 to 3, characterized in that, The inner end of the shift slider (3) is connected to the body (1) via a first return spring (a) extending along the length direction of the body (1). When the centrifugal impeller (2) is rotating, the shift slider (3) moves away from the middle of the body (1) along the length direction of the body (1) under the action of centrifugal force, and the first return spring (a) is stretched, causing the shift slider (3) to have a tendency to move towards the middle of the body (1).

5. The spray arm as described in any one of claims 1 to 3, characterized in that, It also includes a locking structure (5) for locking the shift slider (3) in the first water spray position (131) or the second water spray position (132).

6. The spray arm as described in claim 5, characterized in that, The locking structure (5) includes two locking pins (51) that correspond one-to-one with the first water spray position (131) and the second water spray position (132). Each locking pin (51) is vertically arranged on the top wall of the main body (1). The bottom surface of the shift slider (3) is recessed with a locking groove (31) for the upper end of each locking pin (51) to be inserted and locked.

7. The spray arm as described in claim 6, characterized in that, The top wall of the main body (1) has vertically downward-facing mounting holes (103) that correspond one-to-one with the aforementioned locking pins (51) and allow the corresponding locking pins (51) to pass through. Each locking pin (51) can move up and down in its corresponding mounting hole (103). Each locking pin (51) is fitted with a fourth return spring (d). When the upper end of each locking pin (51) is pressed into its corresponding mounting hole (103), each fourth return spring (d) is compressed and supports its corresponding locking pin (51). Of the two aforementioned locking pins (51), the top surface of the locking pin (51) adjacent to the middle of the main body (1) slopes downward from the inside to the outside on both sides along the length of the main body (1), while the top surface of the other locking pin (51) slopes downward from the inside to the outside on one side adjacent to the middle of the main body (1) along the length of the main body (1), and the other side is at a right angle. The top surface of the aforementioned lock groove (31) forms a first limiting plane (311) that can abut against the top surface of each lock pin (51). The side of the lock groove (31) away from the middle of the body (1) is right-angled, and the edge of the groove opening on this side slopes downward from the inside to the outside along the length direction of the body (1) to form a first pressing slope (32). The groove surface on the other side of the lock groove (31) slopes downward from the inside to the outside to form a second pressing slope (33).

8. The spray arm as described in claim 7, characterized in that, Each of the mounting channels (103) is provided with a limiting seat (52) for limiting the locking pin (51) to the upper and lower. A fifth return spring (e) is provided at the bottom of the limiting seat (52). The fifth return spring (e) makes the limiting seat (52) always have the tendency to move upward and limit the locking pin (51).

9. The spray arm as described in claim 8, characterized in that, It also includes an unlocking mechanism (6) for unlocking the aforementioned locking structure (5). The unlocking mechanism (6) is disposed in the aforementioned flow channel (12) and includes an unlocking slider (61) and an unlocking push rod (62). The unlocking slider (61) is disposed at the inlet (121) of the flow channel (12) along the width direction of the body (1) and can move back and forth along the width direction of the body (1) under the drive of the water flow from the outlet (112) of the water collection chamber (11). The unlocking push rod (62) is disposed along the length direction of the body (1) and can move back and forth synchronously along the length direction of the body (1) under the drive of the unlocking slider (61). The unlocking push rod (62) is provided with unlocking push blocks (621) that correspond one-to-one with each locking pin (51). When the shift slider (3) is locked in one of the spray positions, the lower end of the locking pin (51) corresponding to that spray position is vertically limited by its corresponding limiting seat (52). When the unlock slider (61) moves, the unlock push rod (62) moves away from the middle of the body (1) and pushes down the limiting seat (52), causing the limiting seat (52) to disengage from the lower end of the corresponding locking pin (51). The shift slider (3) is unlocked and, under the action of centrifugal force or the first Under the action of the elastic force of a return spring (a), it moves to another spray position. The centrifugal impeller (2) turns and the water flow at the outlet (112) changes direction. The unlocking slider (61) moves in another direction and the unlocking push rod (62) moves towards the middle of the body (1) and disengages from each limiting seat (52). Each limiting seat (52) moves upward and relocks the corresponding locking pin (51). The upper end of the corresponding locking pin (51) is inserted into the locking groove (31) of the shift slider (3).

10. The spray arm as described in claim 9, characterized in that, A spring buckle (53) is horizontally arranged below the corresponding locking pin (51) in the mounting channel (103) away from the middle of the main body (1) to laterally limit the corresponding limiting seat (52) of the locking pin (51). The bottom of the spring buckle (53) is provided with a first limiting protrusion (531), and the top of the unlocking push block (621) corresponding to the limiting seat (52) is provided with a second limiting protrusion (6211). A second limiting plane (35) is continuously provided on the bottom surface of the shift slider (3) along the length direction of the body (1) on the outer side of the second pressing inclined surface (33), and a third limiting plane (36) is continuously provided on the inner side of the second pressing inclined surface (33). The third limiting plane (36) is lower than the second limiting plane (35). A third pressing inclined surface (37) and a fourth pressing inclined surface (38) are respectively provided at the inner and outer ends of the bottom surface of the shift slider (3). The third pressing inclined surface (37) is continuously provided with the third limiting plane (36) and is inclined outward from top to bottom, while the fourth pressing inclined surface (38) is continuously provided with the second limiting plane (35) and is inclined inward from top to bottom. When the shift slider (3) is locked in the second water spray position (132), the shift slider (3) moves away from the center of the body (1) under the action of centrifugal force. The top surface of the corresponding locking pin (51) abuts against the third limiting plane (36). The locking pin (51) moves down and the corresponding limiting seat (52) is limited in the spring buckle (53). The locking pin (51) disengages from the corresponding limiting seat (52), the centrifugal impeller (2) stops rotating, and the shift slider (3) moves to the first water spray position (131) under the action of the elastic force of the first return spring (a). Each unlocking push block (621) disengages from the corresponding limiting seat (52) and the second limiting protrusion (6211) drives the spring buckle (53) to disengage from the corresponding limiting seat (52) through the first limiting protrusion (531).

11. The spray arm as described in claim 9, characterized in that, The unlocking slider (61) is linked to the unlocking push rod (62) via a transmission mechanism (7). The transmission mechanism (7) includes a first transmission rack (71) fixed to the unlocking slider (61), a second transmission rack (72) fixed to the unlocking push rod (62), a first transmission gear set (73), and a second transmission gear set (74). The first transmission rack (71) extends along the width direction of the body (1), the second transmission rack (72) extends along the length direction of the body (1), and the first transmission gear set (74)... 3) A first cylindrical gear (731) and a first bevel gear (732) are arranged and coaxially arranged along the length direction of the body (1), while the second transmission gear set (74) is arranged vertically and includes a second cylindrical gear (741) and a second bevel gear (742) arranged coaxially. The first cylindrical gear (731) meshes with the first transmission rack (71), and the second cylindrical gear (741) meshes with the second transmission rack (72). The first bevel gear (732) and the second bevel gear (742) mesh with each other.

12. The spray arm as described in claim 9, characterized in that, The wall of the water collection cavity (11) includes a first sidewall (111) extending along the width direction of the body (1) and disposed in the middle of the width direction of the body (1). The first outlet (1121) and the second outlet (1122) of the water collection cavity (11) are formed on both sides of the first sidewall (111). The inlet (121) of the flow channel (12) is opposite to the first sidewall (111), and an installation gap extending along the width direction of the body (1) is left between the inlet (121) of the flow channel (12) and the first sidewall (111). The unlocking slider (61) is disposed in the installation gap. Furthermore, when the centrifugal impeller (2) is not rotating, the unlocking slider (61) is aligned with the first sidewall (111) and closes the inlet (121) of the flow channel (12). When the centrifugal impeller (2) rotates clockwise, the unlocking slider (61) moves to one end along the width direction of the body (1), and the first outlet (1121) and inlet (121) are both opened and connected. When the centrifugal impeller (2) rotates counterclockwise, the unlocking slider (61) moves to the other end along the width direction of the body (1), and the second outlet (1122) and inlet (121) are both opened and connected.

13. The spray arm as described in claim 12, characterized in that, The first sidewall (111) is recessed on the outer side of the water collection cavity (11) with a sliding groove (1111) extending along the width direction of the body (1), and the corresponding side of the unlocking push block (621) is provided with a sliding protrusion (611). The sliding protrusion (611) is embedded in the sliding groove (1111) and can move back and forth along the sliding groove (1111). The two ends of the sliding protrusion (611) along the width direction of the body (1) are respectively clamped between the corresponding side of the sliding groove (1111) and the corresponding side of the sliding groove (1111). When the sliding protrusion (611) moves to any end, the corresponding sixth return spring (f) causes the unlocking slider (61) to have a tendency to move to face the first sidewall (111).

14. A dishwasher, characterized in that, It has a spray arm as described in any one of claims 1 to 13.

Images