KR101779432B1 - Dish Washer - Google Patents

Abstract

A dishwasher according to an embodiment of the present invention includes a tub; A spray arm for spraying wash water on the object to be cleaned; A sump mounted on the bottom of the tub for storing wash water and supplying wash water to the spray arm; An arm holder fixed to the spray arm to support the spray arm and rotatably mounted on the sump; A fixed gear portion fixed inside the tub and having a gear formed on an outer circumferential surface thereof; A rotator unit rotatably mounted on the injection arm and engaged with gears of the fixed gear unit; And a link member connected to the rotary member and the injection arm, the injection arm including: a main arm including an arm holder engagement portion connected to the arm holder and a pair of arms extending around the arm holder engagement portion; And a pair of auxiliary arms which are rotatably provided on the main arm and extend around the arm holder engaging portion. The rotating gear portion rotates by engaging with gears of the fixed gear portion by rotation of the main arm, And is moved by the rotation of the fisher unit, and each auxiliary arm is pushed and rotated.

Description

Dish Washer {Dish Washer}

The present invention relates to a dishwasher.

A dishwasher is a device that uses a detergent and washing water to wash away dirt, such as food waste, on a tableware or cooking utensil (hereinafter, referred to as a 'subject to be cleaned').

The dishwasher includes a tub for providing a washing space, a dish rack provided in the tub for receiving a washing object, a spray arm for spraying washing water into the rack, a sump for storing washing water, And a supply passage for supplying the gas to the reaction chamber.

The dishwasher having the above-described configuration can remove the dirt from the cleaning object by spraying the cleaning water to the cleaning object accommodated in the rack according to the cleaning course selected by the user, and the object to be cleaned can be dried through the hot air.

Korean Patent Laid-Open Publication No. 10-2012-0126598, which is a prior art document, discloses such a dishwasher-related idea.

In the case of the dishwasher disclosed in the prior art, the washing water is injected upward through the nozzle of the spray arm accommodated in the tub.

On the other hand, it is necessary to uniformly spray the washing water on the surface of the bowl when the washing water is sprayed into the bowl to be washed. Therefore, the washing water needs to be sprayed from multiple angles. In the case of a conventional dishwasher, there is an effect that the injection nozzle rotates by rotation of the injection arm, but it is necessary to diversify the injection angle for more efficient washing.

A problem to be solved by the present invention is to diversify the injection angle by using an auxiliary arm rotatably mounted on the main arm and the main arm.

A further object of the present invention is to rotate the main arm using a repulsive force by the injection of washing water without a separate driving device.

A further object of the present invention is to reciprocally rotate the auxiliary arm using the rotational force of the main arm without a separate driving device.

Another object of the present invention is to arrange that the rotation of the main arm is restricted by the rotation of the auxiliary arm, but that the main arm is rotatable even when the auxiliary arm becomes unrotatable.

Another object of the present invention is to prevent the auxiliary arm from rotating beyond the set range when the auxiliary arm reciprocates.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

In order to reciprocate the auxiliary arm using the rotational force of the spray arm without a separate driving device, the dishwasher according to the embodiment of the present invention includes a spray arm for spraying washing water to the object to be cleaned; A fixed gear portion having a gear formed on an outer circumferential surface thereof; A rotator unit rotated by engaging with gears of the fixed gear unit by rotation of the injection arm; And a link member connected to the rotator unit and the injection arm, wherein the injection arm includes: a main arm including a pair of arms; And a pair of auxiliary arms rotatably provided on the main arm, wherein the link member is moved by rotation of the rotator unit to push and rotate each auxiliary arm.

The dishwasher further includes an eccentric projection provided at a position eccentric from the center of rotation of the rotary member and inserted into the link member so that the link member can reciprocate by rotation of the rotary member, An elongated hole or an elongated insertion portion into which the eccentric projections are inserted is formed and the eccentric projections are circularly moved by the rotation of the rotary member to move the link members.

Wherein the dishwasher further comprises a guide protrusion provided in the main arm and guided by the link member to guide the link member in a linear reciprocating motion in order to switch the rotational force of the rotator fisher unit to reciprocating motion of the link member, The main extension portion may be formed with a guide portion into which the guide protrusion is inserted.

The link member includes a rim portion into which the arm holder engagement portion is inserted, a main extension portion extending from the rim portion and disposed below the pair of arms provided in the main arm, And the auxiliary extension portion is disposed under the auxiliary arms, and the auxiliary extension portion is elastically deformable along the moving direction of the link member. The auxiliary extension portion may be provided with a stopper for limiting a rotation range of each of the auxiliary arms.

In order to enable rotation of the main arm even in a state in which the auxiliary arm is not rotatable, the injection arm further includes a gear rotation shaft into which the rotation gear unit is inserted, and the rotation gear unit includes a rotation shaft accommodating portion into which the gear rotation shaft is inserted . The dishwasher further includes an elastic portion formed in the rotating shaft receiving portion and pressing the rotating shaft portion toward the fixed gear portion so as to be in close contact with the fixed gear portion.

In order to enable unidirectional rotation of the main arm even in a state where the auxiliary arm is not rotatable, gears provided respectively in the fixed gear portion and the rotary gear portion include a vertical portion and an inclined portion extending obliquely at an angle from the upper end of the vertical portion So as to form an asymmetrical shape.

In order to rotate the main arm without a separate driving device, the injection arm may be rotated by a repulsive force generated as the washing water is sprayed from the ejection openings formed in the main arm or the auxiliary arm.

According to the embodiment of the present invention, the following effects can be obtained.

 Since the auxiliary arm provided on the main arm rotates together with the main arm and is reciprocally rotatable within a predetermined range apart from the rotation of the main arm, the injection angle is varied, thereby increasing the cleaning efficiency.

Further, since the main arm can be rotated by the repulsive force generated by jetting the washing water supplied through the water supply pump to the jetting port, there is an advantage that a separate driving source is not required.

Further, there is an advantage that the auxiliary arm can be rotated by the gear connection in addition to the rotation of the main arm without a separate driving source.

Further, since the guide projections and the guide portions for guiding the reciprocating motion of the link member are provided, the rotational force of the rotator unit is converted into the linear reciprocating motion of the link member, so that the assistant arm can be smoothly reciprocated.

Further, since the link member connects the auxiliary arm to the main arm, if the rotation of the auxiliary arm is restricted, the link member may be stopped and the rotation of the main arm may be stopped. However, The arm has a characteristic of being rotatable.

Further, by providing the stopper on the link member, it is possible to prevent the auxiliary arm from deviating from the set range when the auxiliary arm reciprocally rotates.

In addition, since the injection arm has not only the upper jetting port but also the lower jetting port, the upward and downward repulsive forces acting on the jetting arm by the jetting of the washing water are offset from each other.

1 is a perspective view of a dishwasher according to an embodiment of the present invention.
FIG. 2 is a view showing a coupling structure of the sump and the injection arm assembly of FIG. 1. FIG.
Figure 3 is an exploded perspective view of the injection arm assembly of Figure 2;
4 is a cross-sectional view of the injection arm assembly of FIG. 2 taken along line I-I.
FIG. 5 is a bottom view of the injection arm of FIG. 3. FIG.
6 is an exploded view of the injection arm of Fig.
7 is a plan view of the fixed gear portion in Fig.
Fig. 8 is a view showing the fixed gear portion of Fig. 7 viewed from below. Fig.
Fig. 9 is a perspective view of the arm holder of Fig. 3;
10 is a plan view of the arm holder of Fig.
11 is a side view of the arm holder of Fig.
12 is a perspective view of the flow path switching portion of Fig. 3,
FIG. 13 is a view of the flow path switching portion of FIG. 12 viewed from below.
Fig. 14 is a perspective view of the rotary fisher unit of Fig. 3; Fig.
15 is a perspective view of the link member of Fig. 3;
16 is a plan view of the link member of Fig. 15;
FIGS. 17 to 20 are views for explaining the assembly procedure of the injection arm assembly of FIG. 3. FIG.
21 is a view showing a state in which the upper gear of the flow path switching portion is engaged with the injection arm.
22 is a view showing a state in which the lower gear of the flow path switching portion is engaged with the arm holder.
23 is a view showing the bottom surface of the injection arm assembly according to the rotation angle of the rotary member.
Figure 24 is a side view of the injection arm assembly of Figure 23;
25 is a view showing a state in which washing water is sprayed from the main arm.
26 is a view showing a state in which wash water is sprayed from the auxiliary arm.
FIG. 27 is a cross-sectional view taken along line II-II of FIG. 25; FIG.
28 is a view showing a state in which washing water is sprayed from the auxiliary arm and is reciprocally rotated.
29 is a view showing a state in which a link member according to another embodiment of the present invention is mounted on an injection arm.
30 is a view showing a state in which the link member according to another embodiment of the present invention is mounted on the injection arm.
31 is a view showing a state in which the fixed gear unit and the rotary gear unit according to another embodiment are engaged.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals whenever possible, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

FIG. 1 is a perspective view of a dishwasher according to an embodiment of the present invention, and FIG. 2 is a view showing a combined structure of the sump and the ejection arm assembly of FIG. 1. Referring to FIG.

1 and 2, the dishwasher 1 according to an embodiment of the present invention includes a tub 2 having a washing space formed therein, a door 3 for selectively opening and closing the washing space, A sump 5 provided inside the tub 1 for storing wash water and a sump 5 provided inside the tub 1 to receive the washing water from the rack 3, And a spray arm assembly 10 for spraying wash water into the object to be cleaned.

The rack (4) can be installed to be pulled out to the front of the tub (2). Accordingly, the user can draw the rack 4 to the front of the tub to house the object to be cleaned.

The sump 5 may include a sump cover 20 and a sump outlet 30 provided in the sump cover 20. The sump 5 can receive the washing water from the outside through the water supply unit 6 and discharge the washing water or the like injected into the tub 2 through the sump discharging unit 30. [ Also, although not shown, a water supply pump for transmitting wash water stored in the sump 5 to the injection arm assembly 10 may be provided in the sump 5. [

The sump discharging unit 30 may include a washing water collecting unit 33 for collecting washing water sprayed into the tub 2. [ Foreign matter such as food waste contained in the washing water can be filtered by the filtering net provided in the washing water collecting unit 33. The washing water recovered into the sump 5 through the washing water collecting unit 33 may be supplied to the spraying arm assembly 10 by the water pump provided in the sump 5. [ That is, the washing water supplied through the water supply unit 6 may be used in a plurality of circuits.

The injection arm assembly 10 may be mounted on the sump cover 20 and may inject the washing water stored in the sump 4 into a washing object accommodated in the rack. The injection arm assembly 10 includes an injection arm 100 for injecting washing water, a fixed gear portion 200 mounted on the sump cover 20 for rotatably supporting the injection arm 100, (300).

The washing water flowing through the water supply unit 6 flows through the sump 5 and flows into the injection arm assembly 10. The washing water introduced into the injection arm assembly 10 is introduced into the injection arm 100 To be cleaned. Meanwhile, the injection arm assembly 10 may be directly connected to the water supply unit 6 and sprayed directly onto the object to be cleaned without passing through the sump 5. [

The injection arm assembly 10 may be provided not only on the lower portion of the rack 4 but also on the upper portion of the rack 4, unlike the illustrated embodiment. The ejection arm assembly 10 may include a plurality of ejection arm assemblies 10 and may be provided to eject wash water to the upper and lower portions of the rack 4, respectively.

Hereinafter, the structure of the injection arm assembly 10 will be described.

Figure 3 is an exploded perspective view of the injection arm assembly of Figure 2;

3, an injection arm assembly 10 according to an embodiment of the present invention includes an injection arm 100, a fixed gear portion 200, an arm holder 300, a flow path switching portion 400, A rotator unit 500, and a link member 600. [

The injection arm 100 may include a main arm 110 and auxiliary arms 140 and 150 rotatably connected to the main arm 110. The auxiliary arms 140 and 150 may be provided in pairs as shown. The main arm 110 may have a plurality of flow paths through which the washing water supplied from the sump 5 flows.

Upper jetting ports 123 and 124 are formed on the upper side of the main arm 110. The upper jetting ports 123 and 124 eject the washing water flowing into the main arm 110. The washing water flowing into the main arm 110 from the sump 5 may be injected upwardly of the main arm 110 through the upper injection ports 123 and 124. The washing water sprayed from the upper jetting ports 123 and 124 can be directed to the object to be cleaned.

The main arm 110 may include an arm holder coupling portion 180 provided on a bottom surface of the main arm 110 and accommodating at least a portion of the arm holder 300.

The auxiliary arms 140 and 150 can be rotated within a predetermined angular range by the link member 600. [ The auxiliary arms 140 and 150 may also have upper auxiliary jetting ports 143 and 153 for jetting washing water flowing into the main arm 110.

The main arm 110 may include a first extension portion 111 and a second extension portion 112 which are radially extended about the arm holder coupling portion 180. The auxiliary arms 140 and 150 may be rotatably mounted on the first extension part 111 and the second extension part 112, respectively.

In the first extension part 111 and the second extension part 112, a first transfer path and a second transfer path may be formed in which the washing water flowing from the sump 5 flows. The washing water flowing through the first transfer passage and the second transfer passage may flow into the auxiliary arms 140 and 150, respectively.

The auxiliary arms 140 and 150 may include a first auxiliary arm 140 rotatably connected to the first extension portion 111 and a second auxiliary arm 140 rotatably connected to the second extension portion 112. [ 150). A part of the washing water flowing into the main arm 110 may flow through a first auxiliary flow path formed inside the first auxiliary arm 140 and a second auxiliary flow path formed inside the second auxiliary arm 150 have.

The first auxiliary arm 140 may have a first upper auxiliary jet opening 143 and the second auxiliary arm 150 may have a second upper auxiliary jet opening 153 formed therein. Accordingly, the washing water introduced into the first auxiliary passage formed in the first auxiliary arm 140 is injected through the first upper auxiliary injection opening 143, and the washing water injected into the second auxiliary arm 140, The washing water introduced into the auxiliary flow path may be injected through the second upper auxiliary jet opening 153.

The injection arm 100 may be rotated by a separate driving device (not shown). However, the injection arm 100 may be rotated by the repulsive force generated when the washing water is sprayed through the upper jetting ports 123, 124 or the upper auxiliary jetting ports 143, 153. That is, the injection arm 100 can be rotated by a repulsive force generated by spraying washing water without a separate driving device such as a motor. The rotation of the injection arm 100 by the wash water injection will be described later.

The main arm 110 includes a first arm 113 extending in one direction from the center of the main arm 110 and a second arm 114 extending in a direction opposite to the first arm 113 can do. The first arm 113 may have a first upper jet opening 123 and the second arm 114 may have a second upper jet opening 124.

The first upper jetting ports 123 may be formed along the longitudinal direction of the first arm 113. The second upper jet opening 124 may be formed along the longitudinal direction of the second arm 114.

The washing water flowing into the injection arm 100 flows into the main arm 110 and may be injected into the upper injection ports 123 and 124. The washing water flowing into the injection arm 100 may flow into the auxiliary arms 140 and 150 and may be injected into the upper auxiliary injection openings 143 and 153.

The fixed gear portion 200 may be fixed to the sump cover 20 by a gear fixing portion 22 provided on the sump cover 20. The fixed gear unit 200 is disposed to be engaged with the rotary shaft unit 500.

The arm holder 300 may be coupled to the injection arm 100 and fixed to the injection arm 100. Accordingly, the arm holder 300 rotates together with the ejection arm 100, and can function as a rotation center axis of the ejection arm 100.

The arm holder 300 may be rotatably fixed to the sump cover 20 in a state where the arm holder 300 is engaged with the injection arm 100. The washing water supplied from the sump 5 flows into the arm holder 300 and is then supplied to the injection arm 100.

Meanwhile, the arm holder 300 may be integrally formed with the main arm 110. In this case, it can be seen that the main arm 110 is rotatably fixed to the sump cover 20.

The flow path switching unit 400 is accommodated in the arm holder 300 and may switch the flow path of the washing water supplied from the arm holder 300 to the injection arm 100. Concrete functions of the flow path switching unit 400 will be described later.

The rotator unit 500 may be rotatably mounted on the bottom surface of the injection arm 100. When the injection arm 100 rotates, the rotary gear unit 500 circularly moves along the circumference of the fixed gear unit 200 fixed to the sump cover 20, You can rotate in conjunction.

The link member 600 may be mounted on the injection arm 100. The link member 600 can reciprocally rotate about the longitudinal direction of the auxiliary arm 140 or 150 as the rotating body 500 rotates. Specific operating principles will be described later.

Hereinafter, each component of the injection arm assembly 10 will be described in detail.

FIG. 4 is a cross-sectional view of the injection arm assembly of FIG. 2 taken along line I-I, and FIGS. 5 through 16 are views for explaining the respective components of the injection arm assembly of FIG.

Referring to FIG. 4, the injection arm assembly 10 is fastened to the sump cover 20. The arm holder 300 is fastened to the arm holder fastening part 23 of the sump cover 20 by the release preventing part 315 of the arm holder 300, 20, respectively.

Next, the fastening portion 223 of the fixed gear portion 200 is fastened to the gear fixing portion 22 of the sump cover 20. Accordingly, the fixed gear unit 200 is engaged with the sump cover 20. Unlike the arm holder 300, the fixed gear unit 200 is fixed so as not to be rotatable.

The rotation unit 500 is inserted into the gear rotation shaft 135 of the injection arm 100. Accordingly, the rotary shaft unit 500 is coupled to the injection arm 100 and is rotatable about the gear rotation shaft 135.

The link member 600 may be supported by guide projections 136 and 137 provided on the injection arm 100. Also, the eccentric protrusion 530 provided in the rotary member 500 may be inserted into the link member 600. The eccentric projections 530 can reciprocate the link member 600 within a predetermined range by the rotation of the fixed gear unit 200.

The fastening protrusion 182 of the injection arm 100 is inserted into the fastening protrusion receiving portion 332 of the arm holder 300. Accordingly, the arm holder 300 is engaged with the injection arm 100.

In the injection arm 100, main flow passages 117 and 118 through which the washing water flowing from the arm holder 300 flows can be formed. Specifically, the main flow paths 117 and 118 include a first main flow path 117 formed in the first arm 113 and a second main flow path 117 formed in the second arm 114 118). The first main flow path 117 and the second main flow path 118 may be partitioned from each other by a partition 116. The washing water flowing in the first main passage 117 may be injected to the outside through the first top injection opening 123 and the washing water flowing in the second main passage 118 may be injected into the second upper injection opening 124 As shown in FIG. The main flow paths 117 and 118 may be referred to as a 'washing water flow path'.

The flow path switching unit 400 is accommodated in the arm holder chamber 320 of the arm holder 300. When the water pressure inside the arm holder chamber 320 increases as the washing water flows into the arm holder chamber 320, the flow path switching unit 400 moves upward, and the washing water flows into the arm holder chamber 320 The hydraulic pressure inside the arm holder chamber 320 is lowered and the flow path switching unit 400 can move downward.

Also, the washing water accommodated in the arm holder chamber 320 may be introduced into the main arm 110.

FIG. 5 is a bottom view of the injection arm of FIG. 3, and FIG. 6 is an exploded view of the injection arm of FIG.

5 and 6, the injection arm 100 according to the embodiment of the present invention includes a main arm 110, auxiliary arms 140 and 150, auxiliary arms 140 and 150, And an auxiliary arm connecting member 160 connecting the auxiliary arm connecting member 160 and the auxiliary arm connecting member 160. The main arm 110 may include an upper frame 120 and a lower frame 130.

The lower frame 130 may have lower jet ports 133 and 134 through which the washing water flowing into the main arm 110 is jetted. The washing water introduced into the main arm 110 may be injected to the lower side of the main arm 110 through the lower injection holes 133 and 134. The upper ejection openings 123 and 124 and the lower ejection openings 133 and 134 may collectively be referred to as 'main ejection openings'.

A repulsive force is generated below the main arm 110 when washing water is sprayed upward from the upper jetting ports 123 and 124. When washing water is sprayed downward from the lower jetting ports 133 and 134, A repulsive force may be generated upwardly of the arm 110. When washing water is sprayed only from one of the upper and lower nozzles, a repulsive force acts on the main arm 110 upwardly or downwardly, so that it is difficult to couple the spraying arm assembly 10. Accordingly, the washing water flowing into the main arm 110 is simultaneously sprayed through the upper ejection openings 123 and 124 and the lower ejection openings 133 and 134, so that the washing water is sprayed to the main arm 110 The repulsive force in the up-and-down direction can be canceled.

The main arm 110 may include a first outlet 111a formed in the first extension portion 111 and a second outlet 112b formed in the second extension portion 112. [ Part of the washing water flowing into the main arm 110 through the sump 5 flows into the first auxiliary arm 140 through the first outlet 111a and part of the washing water flows into the second outlet 112b, And the second auxiliary arm 150 may be connected to the second auxiliary arm 150 through the second auxiliary arm 150.

As shown in the figure, the first auxiliary arm 140 is disposed at an acute angle with the first arm 113, and the second auxiliary arm 150 is disposed at an acute angle with the second arm 114 . However, the present invention is not limited to such a shape and can be appropriately changed according to the design. For example, the first arm 113 and the second arm 114 are disposed at an acute angle to each other, and the first and second auxiliary arms 140 and 150 are disposed at an acute angle with respect to each other .

Lower auxiliary injection ports 144 and 154 may be formed on the bottom surfaces of the auxiliary arms 140 and 150. A first lower auxiliary jet opening 144 may be formed in the first auxiliary arm 140 and a second lower auxiliary jet opening 154 may be formed in the second auxiliary arm 150.

The washing water flowing into the auxiliary arms 140 and 150 is simultaneously injected through the upper auxiliary injection openings 143 and 153 and the lower auxiliary injection openings 144 and 154 so that the auxiliary arms 140 and 150 Can be canceled out in the vertical direction.

Meanwhile, the upper auxiliary jetting ports 143 and 153 and the lower auxiliary jetting ports 144 and 154 may collectively be referred to as 'auxiliary jetting ports'.

The main arm 110 may include a gear rotation shaft 135 that is inserted into the rotary shaft unit 500 and functions as a rotary shaft of the rotary shaft unit 500. The gear rotating shaft 135 may protrude from the lower frame 130. Meanwhile, the gear rotation shaft 135 may be disposed on the bottom surface of the first arm 113 as shown in FIG.

The injection arm 100 may include guide projections 136 and 137 for guiding the movement of the link member 600. The guide protrusions 136 and 137 include first guide protrusions 136 provided on the bottom surface of the first arm 113 and second guide protrusions 137 provided on the bottom surface of the second arm 114 . The first guide projection 136, the gear rotation shaft 135, and the second guide projection 137 may be aligned with each other.

The auxiliary arms 140 and 150 may include power transmission units 146 and 156 that receive power from the link member 600. The power transmitting portions 146 and 156 may be protrusions protruding downward from the bottom surfaces of the auxiliary arms 140 and 150. The first auxiliary arm 140 is provided with a first power transmitting portion 146 and the second auxiliary arm 150 is provided with a second power transmitting portion 156.

The auxiliary arm 140 and 150 can be reciprocally rotated by transmitting the power transmitted from the rotating body unit 500 to the power transmission units 146 and 156 by the link member 600. [ That is, the reciprocating motion of the link member 600 is converted into the rotational motion of the auxiliary arm 140, 150.

The main arm 110 may include an arm holder coupling portion 180 provided on the lower frame 130. The arm holder engaging portion 180 may include an arm holder receiving tube 181 into which the arm holder 300 is inserted and a fastening protrusion 182 fastened to the arm holder 300. The fastening protrusion 182 is fastened to the arm holder 300 so that the main arm 110 can be fixed to the arm holder 300.

The arm holder receiving pipe 181 may extend downward from the lower frame 130. The arm holder receiving tube 181 may have a cylindrical shape and may be in contact with the arm holder 300.

The main arm 110 can be fixed to the arm holder 300 by fastening the fastening protrusion 182 to the arm holder 300. The fastening protrusions 182 may be provided along the outer circumferential surface of the arm holder coupling portion 180.

The main arm 110 may be provided with a plurality of inflow ports 138a, 138b, 138c and 138d through which the washing water supplied from the arm holder 300 flows. The plurality of inflow ports 138a, 138b, 138c, and 138d may be provided in the lower frame 130.

The plurality of inlets 138a, 138b, 138c and 138d includes a first inlet 138a communicating with the first main passage 117, a second inlet 138b communicating with the second main passage 118, . The washing water flowing into the first inlet 138a flows into the first main passage 117 and is injected into the injection ports 123 and 133 provided in the first arm 113, 138b may flow into the second main flow path 118 and may be injected into the injection ports 124, 134 provided in the second arm 114. [

The plurality of inlets 138a, 138b, 138c and 138d include a third inlet 138c communicating with the first outlet 111a and a fourth inlet 138d communicating with the second outlet 112b do.

That is, the first outlet 111a and the third inlet 138c are communicated with each other to form the first transfer passage, and the second outlet 112b and the fourth inlet 138d are communicated with each other, Thereby forming a delivery passage. The first transfer passage and the second transfer passage may be partitioned by the partition 116.

The washing water flowing into the third inlet 138c flows into the first auxiliary arm 140 through the first transfer passage and is then injected into the injection ports 143 and 144 provided in the first auxiliary arm 140, The washing water flowing into the fourth inlet 138d flows into the second auxiliary arm 150 through the second transfer passage and is then discharged through the injection ports 153 and 154 provided in the second auxiliary arm 150, Lt; / RTI >

The lower frame 130 may be provided with an upper gear mating portion 139, which is engaged with an upper gear of the flow path switching portion 400, which will be described later. The upper gear mating portion 139 may rotate the flow path switching portion 400 by a predetermined angle. The passage switching portion 400 can open or close the respective inlet ports 138a, 138b, 138c and 138d as the upper gear engagement portion 139 is engaged with the upper gear engagement portion 139. [ Specific principles for opening or closing the plurality of inflow ports 138a, 138b, 138c, and 138d by the flow path switching unit 400 will be described later.

The auxiliary arm connecting member 160 includes an insertion tube 162 inserted into the main arm 110 and an extension tube 164 through which the washing water introduced from the insertion tube 162 flows, A shaft 166 connected to the extension pipe 164 and a protrusion 168 protruding from the shaft 166.

A flow hole 167 may be formed between the extension pipe 164 and the shaft 166. The washing water flowing into the insertion tube 162 may be discharged to the flow hole 167 through the extension pipe 164. The wash water discharged into the flow holes 167 flows into the inner space of the auxiliary arms 140 and 150 and may be sprayed through the injection port.

Meanwhile, the injection arm 100 may not include the auxiliary arm connecting member 160. In this case, the auxiliary arms 140 and 150 may be directly connected to the main arm 110 so as to be rotatable. However, since the auxiliary arm 140 and 150 are supported by the auxiliary arm connecting member 160 on the end side, deflection of the auxiliary arm 140 and 150 can be prevented.

Fig. 7 is a plan view of the fixed gear portion of Fig. 3, and Fig. 8 is a view of the fixed gear portion of Fig. 7 viewed from below.

7 and 8, the fixed gear unit 200 according to the embodiment of the present invention includes a rim 210 having a plurality of teeth 213, and a plurality of teeth 213 extending downward from the rim 210 As shown in FIG. The arm holder coupling portion 180 may be inserted into the rim portion 210. The plurality of gears 213 may be referred to as a first gear portion 213.

The rim portion 210 may include a clearance reduction protrusion 215 for reducing the clearance between the rim portion 210 and the arm holder engagement portion 180. The clearance reducing protrusions 215 may be provided in a plurality of protrusions and protrude toward the center of the rim 210.

The support part 220 may be provided on both sides of the rim part 210. The support portion 220 may include a fastening portion 223 that engages with the sump cover 20. The coupling part 223 may be a protrusion protruding from the side surface of the support part 220. The fixed gear portion 200 can be fixed to the sump cover 20 by fastening the coupling portion 223 to the sump cover 20.

The support portion 220 may further include a grip portion 225 that can be gripped by the user when the fixed gear portion 200 is coupled to or detached from the sump cover 20. [ The grip portion 225 may extend in the radial direction of the fixed gear portion 200. Also, at least a portion of the surface of the handle 225 may be protruded or recessed so that the user can easily grasp the surface.

FIG. 9 is a perspective view of the arm holder of FIG. 3, FIG. 10 is a plan view of the arm holder of FIG. 9, and FIG. 11 is a side view of the arm holder of FIG.

9 to 11, an arm holder 300 according to an embodiment of the present invention includes an inflow portion 310 through which the wash water stored in the sump 5 flows, and an inflow portion 310 communicating with the inflow portion 310 An arm holder chamber 320 for supplying washing water introduced from the inflow portion 310 to the injection arm 100 and a coupling portion 330 for coupling with the injection arm 100.

The inflow portion 310 may be formed with a wash water inlet 313 through which the wash water stored in the sump 5 is supplied. Accordingly, the wash water stored in the sump 5 can be introduced into the arm holder 300 through the wash water inlet 313. [0065]

The inflow portion 310 may include a separation preventing portion 315 for preventing the arm holder 300 from being separated from the sump cover 20. The separation preventing portion 315 may be formed by expanding the end portion of the inflow portion 310. The separation preventing portion 315 may be fastened to the sump cover 20 by an arm holder fastening portion 23 (see FIG. 20) to be described later. Accordingly, the inflow part 310 can be rotatably fixed to the sump cover 20.

The inflow part 310 may further include a sealing part 317 for preventing the leakage of the washing water flowing from the sump 5. [ The hermetically sealed portion 317 may be a rib formed along the outer circumferential surface of the inflow portion 310. Most of the washing water supplied from the sump 5 can be introduced into the arm holder 300 by the sealing portion 317.

The arm holder chamber 320 may include an inlet pipe 321. The inlet pipe 321 may have a cylindrical shape as shown. A hole may be formed in the bottom surface of the arm holder chamber 320 to communicate with the washing water inlet 313. The arm holder chamber 320 may be received in the arm holder engaging portion 180. At this time, the outer circumferential surface of the arm holder chamber 320 may be in surface contact with the inner circumferential surface of the arm holder engaging portion 180. Accordingly, the space between the arm holder coupling part 180 and the arm holder chamber 320 is sealed, and the leakage of the washing water flowing into the injection arm 100 from the arm holder 300 can be prevented .

The arm holder chamber 320 may receive the flow path switching unit 400. The washing water introduced into the arm holder chamber 320 may be selectively introduced into the plurality of inflow ports 138a, 138b, 138c, and 138d by the flow path switching unit 400.

The arm holder chamber 320 may be provided with a lower gear meshing portion 323 which meshes with a lower gear of the flow path switching portion 400, which will be described later. The lower gear mating portion 323 engages with a lower gear of the oil line switching portion 400 to be described later to rotate the oil line switching portion 400 by a predetermined angle.

The lower gear mating portion 323 may be provided along the edge of the bottom surface 322 of the arm holder chamber 320. [ The lower gear mating portion 323 may be provided in four places and may be disposed on the bottom surface 322 of the arm holder chamber 320 at an interval of 90 degrees with respect to the washing water inlet 313 .

The coupling portion 330 may be provided on the outer circumferential surface of the arm holder chamber 320. The engaging part 330 includes a seating part 331 on which the arm holder engaging part 180 is seated and a fastening protrusion receiving part 332 provided on the seating part 331 and engaged with the fastening protrusion 182. [ And a clearance reduction protrusion 334 provided on the outer circumferential surface of the coupling part 330 to reduce the gap with the fixed gear part 200.

Fig. 12 is a perspective view of the flow path switching portion of Fig. 3, and Fig. 13 is a view of the flow path switching portion of Fig. 12 viewed from below.

12 and 13, the flow path switching unit 400 according to the embodiment of the present invention includes a switching unit main body 410, an upper gear provided on the upper surface of the switching unit main body 410, And a lower gear 430 provided on a lower surface of the lower gear 410. The upper gear may include a plurality of upper gears 421, 422, 423, 424.

The switching unit main body 410 is accommodated in the inlet pipe 321 of the arm holder chamber 320 and is reciprocated vertically in the arm holder chamber 320 according to the water pressure inside the arm holder chamber 320. [ You can exercise. The switching unit main body 410 may have a disk shape corresponding to the cross-sectional shape of the inflow pipe 321.

The switching unit main body 410 may be provided with open holes 413 and 414 through which the washing water flowing into the arm holder chamber 320 flows. When the plurality of upper gears 421, 422, 423 and 424 are engaged with the upper gear mating portion 139, the opening holes 413 and 414 are connected to the plurality of inlets 138a, 138b, 138c, It is possible to communicate with any one of them.

The plurality of upper gears 421, 422, 423 and 424 may be provided in four positions and may be disposed at intervals of 90 degrees with respect to the center C of the switching unit main body 410.

The plurality of upper gears 421, 422, 423 and 424 may be spaced from the center C of the switch body 410 and the edge of the switch body 410 by a predetermined distance. At this time, the open holes 413 and 414 are formed between the upper gears 421 and 423 facing each other in the plurality of upper gears 421, 422, 423 and 424, Respectively.

The plurality of upper gears 421, 422, 423 and 424 includes first and third upper gears 421 and 423 disposed adjacent to the open holes 413 and 414, 421, 423 of the first and second upper gears 422, 424 disposed opposite to each other.

138b, 138c, and 138d are in close contact with the plurality of inflow ports 138a, 138b, 138c, and 138d on one side of the second and fourth upper gears 422 and 424, respectively, The inflow preventing portions 422a and 424a can be formed.

The lower gear 430 can be engaged with the lower gear mating portion 323 provided in the arm holder chamber 320. [ The lower gears 430 may be provided in four positions and may be disposed at intervals of 90 degrees with respect to the center C of the switching unit main body 410.

The lower gear 430 includes two inclined surfaces 433 and 434 and a vertex 435 formed between the two inclined surfaces 433 and 434. Each of the inclined surfaces 433 and 434 extends at an angle of 45 degrees on the circumference of the switch body 410.

The flow path switching unit 400 includes a protrusion 433 provided on a side surface of the switching unit main body 410 to prevent foreign matter from being caught between the flow path switching unit 400 and the inner circumferential surface of the arm holder chamber 320, As shown in FIG. The protrusions 433 may be provided in a plurality of protrusions. Also, although not shown, the protrusion 433 may be provided on a side surface of the lower gear 430. [

The flow path switching unit 400 may include a rotation unit 440 provided on a bottom surface of the switching unit main body 410. The rotation unit 440 serves to rotate the flow path switching unit 400 by the washing water flowing from the bottom of the flow path switching unit 400. Accordingly, the flow path switching unit 400 can selectively open and close the plurality of inflow ports 138a, 138b, 138c, and 138d by rotating in a predetermined angle unit by water pressure without a separate drive unit. This will be described in detail in Fig. 21 and Fig. The rotation unit 440 may include a shaft 441 and an impeller 443 provided on the shaft 441.

Fig. 14 is a perspective view of the rotary fisher unit of Fig. 3; Fig.

14, a rotating machine 500 according to an embodiment of the present invention includes a rim 510 having a plurality of gears 513 along an outer circumferential surface thereof, And an eccentric protrusion 530 inserted into the link member 600 to reciprocate the link member 600. [ The plurality of gear teeth 513 may be referred to as a second gear portion 513.

The rotation axis receiving portion 520 is provided in the rim portion 510, and the gear rotation axis 135 can be inserted. The rotary shaft receiving portion 520 may extend toward the upper side of the rotary shaft unit 500 (downward of the rotary shaft unit in FIG. 14).

The eccentric protrusion 530 may be provided on the bottom surface of the rotating shaft receiving portion 520 (the upper side of the rotating shaft unit in FIG. 14). The eccentric projections 530 may extend from the bottom surface of the rotary shaft unit 500 in the direction of the rotation axis S of the rotary shaft unit 500. The rotation axis S corresponds to the center of rotation of the rotator unit 500 and may be provided at the center of the rim 510. However, unlike the illustrated embodiment, the eccentric projections 530 may be provided in the rim portion 510.

Fig. 15 is a perspective view of the link member of Fig. 3, and Fig. 16 is a plan view of the link member of Fig. 15. Fig.

15 and 16, a link member 600 according to an embodiment of the present invention includes an annular rim portion 610 and a plurality of extending portions 620 and 630 extending radially from the rim portion 610, 630, 640, 650).

The rim portion 610 may be formed with an insertion hole 612 through which the arm holder coupling portion 180 is inserted. The insertion hole 612 may have an elliptical shape. Accordingly, the arm holder engaging portion 180 can move along the long axis 612a of the insertion hole 612. [

The tongue portions 614 and 615 may be formed on the outer circumferential surface of the rim portion 610. The tacking portions 614 and 615 are formed so that the shape of the link member 600 corresponds to the shape of the injection arm 100. In addition, since the tongue portions 614 and 615 are formed, the user can easily grasp the link member 600.

The rim portion 610 may further include a reinforcing rib 617 for reinforcing the strength of the rim portion 610. The reinforcing ribs 617 may be formed along the circumferential direction of the rim portion 610 and protrude upward.

The plurality of extension portions 620, 630, 640 and 650 may include a first main extension portion 620 located below the first arm 113 and a second main extension portion 620 located below the second arm 114, A second auxiliary extension portion 640 located below the first auxiliary arm 140 and a second auxiliary extension portion 640 located below the second auxiliary arm 150 650).

The first main extension portion 620 is formed with a first guide portion 623 into which the first guide protrusion 136 is inserted and the second main extension portion 630 is provided with the second guide protrusion 137, The second guide portion 633 may be formed. The first and second guide protrusions 136 and 137 are inserted into the first and second guide portions 623 and 633 so that the long axis 623a of the first and second guide portions 623 and 633 And 633a, respectively. Accordingly, the reciprocating linear motion of the link member 600 can be guided.

The first auxiliary extension portion 640 is formed with a first engagement portion 643 into which the first power transmission portion 146 is inserted and the second auxiliary extension portion 650 is provided with the second power transmission portion 156 The second engaging portion 653 may be formed. Since the first and second power transmitting portions 146 and 156 are inserted into the first and second engaging portions 643 and 653 respectively so that the movement of the link member 600 is transmitted to the power transmitting portions 146 and 156 To the auxiliary arm (140, 150).

The first main extension 620 may further include a depression 624 for avoiding interference with the rotary unit 500. The depression 624 may be formed with an insertion portion 625 into which the eccentric protrusion 530 of the rotary unit 500 is inserted. The inserting portion 625 may be formed as an elongated hole as shown in FIG. However, the insertion portion 625 may be formed in a shape of a slot other than that shown.

The first main extension 620 may further include contact portions 627a, 627b, and 627c that contact the rim portion 510 of the rotary member 500. [ The contact portions 627a, 627b, and 627c may be ribs protruding from the surface of the depressed portion 624. By providing the contact portions 627a, 627b, and 627c, the contact area between the rotary shaft portion 500 and the first main extension portion 620 is reduced. Accordingly, the frictional force generated between the rotator unit 500 and the first main extension 620 when the rotator unit 500 is rotated can be reduced.

FIGS. 17 to 20 are views for explaining the assembly procedure of the injection arm assembly of FIG. 3. FIG.

17 to 20, the injection arm 100 is engaged with the rotary unit 500 (refer to FIG. 17). The rotation unit 500 may be inserted into the gear rotation shaft 135 of the injection arm 100.

Next, the link member 600 is further mounted on the injection arm 100 (see FIG. 18). The link member 600 is first connected to the power transmitting portions 146 and 156 and then connected by the guide protrusions 136 and 137. That is, the link member 600 may be connected at four points of the injection arm 100. At this time, the eccentric protrusion 530 of the rotary shaft 500 is inserted into the insertion portion 625 of the depression 624.

The first power transmitting portion 146 is inserted into the first engaging portion 643. The power transmitting portion 146 may include a release preventing rib 146a for preventing the power transmitting portion 146 from being separated from the first engaging portion 643. [ The separation preventing rib 146a may extend toward the center of the injection arm 100 as shown in FIG. Similarly, the second power transmitting portion 156 may include an escape preventing rib having the same shape as the escape preventing rib 146a provided in the first power transmitting portion 146. [

The second guide protrusion 137 is inserted into the second guide portion 633. The second guide protrusion 137 may include two elastic members 137a and 137b as shown in FIG. In order to prevent the two elastic bodies 137a and 137b from being separated from the second guide part 633, the ends may extend in the horizontal direction. When the second guide protrusion 137 is inserted into the second guide portion 633, the two elastic members 137a and 137b may be bent in a direction to be close to each other. After the second guide protrusion 137 is inserted into the second guide portion 633, the two elastic members 137a and 137b are restored to their original state by elasticity. The first guide protrusion 136 may have the same shape as the second guide protrusion 137.

Next, the fixed gear portion 200 is further coupled to the injection arm 100 (see FIG. 19). The fixed gear portion 200 is mounted so as to surround the arm holder engaging portion 180. That is, the arm holder engaging portion 180 is inserted into the rim portion 210 of the fixed gear portion 200. At this time, the gears of the fixed gear unit 200 are engaged with gears of the rotary gear unit 500. As described above, the fastening portion 223 is fastened to the sump cover 20 so that the fixed gear portion 200 is fixed to the sump cover 20.

Meanwhile, the number of gear teeth of the fixed gear unit 200 may be designed so that the number of gear teeth of the rotary gear unit 500 is small. Accordingly, when the rotary gear unit 500 rotates about the periphery of the fixed gear unit 200, it can not be engaged at the same position.

Next, the arm holder 300 is further coupled to the injection arm 100 (see FIG. 20). First, when the arm holder 300 is inserted into the arm holder coupling part 180 and then the arm holder 300 is rotated by a predetermined angle, the coupling projections 182 are inserted into the coupling projection receiving part 332, Respectively. Accordingly, the arm holder 300 can be coupled to the arm holder engaging portion 180.

Hereinafter, a method for selectively opening and closing the plurality of inflow ports 138a, 138b, 138c, and 138d will be described.

FIG. 21 is a view showing a state in which the upper gear of the flow path switching portion is engaged with the injection arm, and FIG. 22 is a view showing a state in which the lower gear of the flow path switching portion is engaged with the arm holder.

21 and 22, the passage switching unit 400 is moved upward by the water pressure of the washing water flowing through the washing water inlet 313, and a plurality of upper portions The gears 421, 422, 423, and 424 may be engaged with the upper gear mating portion 139 provided on the bottom surface of the injection arm 100. [ At this time, the washing water flowing into the inflow pipe 321 may flow into the first main flow path 117 through the first opening hole 413.

At the same time, the washing water flowing into the inflow pipe 321 may be introduced into the second main flow path 117 through the second opening hole 414. That is, when the open holes 413 and 414 are communicated with the first and second inflow ports 138a and 138b, the wash water flowing into the inflow pipe 321 flows into the main flow paths 117 and 118 at the same time . At this time, the third and fourth inlets 138c and 138d are closed by the switching unit main body 410. Thus, the inflow of the washing water through the first and second transfer passages is cut off. At the same time, the inflow of wash water through the first and second auxiliary flow paths is also interrupted.

On the other hand, when the inflow of the washing water through the washing water inlet 313 is stopped, the force acting on the upper side of the path switching unit 400 is removed and the path switching unit 400 is lowered. The lower gear 430 of the flow path switching unit 400 is engaged with the lower gear mating portion 323 of the arm holder 300. [

While the lower gear 430 is engaged with the lower gear mating portion 323, the flow path switching portion 400 rotates clockwise (or counterclockwise) by a certain angle. At this time, the flow path switching unit 400 can rotate about 45 degrees. This is because the inclined surface 433 provided on the lower gear 430 occupies an angle of 45 degrees on the circumference of the switching unit body 410.

Although not shown in the drawing, when the washing water flows into the washing water inlet 313 after the flow path switching part 400 descends, the flow path switching part 400 rises and the plurality of upper gears 421, 422, 423, and 424 may be engaged with the upper gear mating portion 139 again. At this time, the open holes 413 and 414 communicate with the third and fourth inlets 138c and 138d rather than the first and second inlets 138a and 138b. Accordingly, the washing water flowing into the inflow pipe 321 flows into the third and fourth inflow ports 138c and 138d through the opening holes 413 and 414. At this time, the first and second inlets 138a and 138b are closed by the switching unit main body 410. Thus, the inflow of wash water through the main flow paths 117 and 118 is blocked.

When the washing water is supplied to the washing water inlet 313, the sump 5 may intermittently supply the washing water. Specifically, the sump 5 may supply the washing water to the arm holder 300 for a predetermined time, and then stop supplying the washing water for a predetermined time. That is, the sump 5 alternately supplies and stops the washing water. Accordingly, as the flow path switching unit 400 rotates while lifting and lowering, the main flow paths 117 and 118 and the first and second transmission flow paths can be alternately opened and closed.

In addition, the time for supplying the washing water to the main flow paths 117 and 118 through the sump and the time for supplying the washing water to the first and second transfer paths may be set to be the same.

Hereinafter, the principle that the auxiliary arms 140 and 150 are reciprocally rotated as the rotary machine 500 rotates will be described.

FIG. 23 is a bottom view of the injection arm assembly according to the rotation angle of the rotation unit, and FIG. 24 is a side view of the injection arm assembly of FIG.

23 (a), 23 (b), 23 (c), and 23 (d) are views for explaining the operation of the ejection arm assembly 10 (A), (b), (c) and (d) of FIG. 24 show the bottom face of the injection arm assembly Fig.

Referring to Figures 23 (a) and 24 (a), in the initial state in which the rotator unit 500 is not rotated, the eccentric projections 530 are located on one side of the inserting portion 625. At this time, the first auxiliary arm 140 is disposed in parallel with the main arm 110.

23 (b) and 24 (b), when the rotary shaft 500 rotates 90 degrees counterclockwise, the link member 600 is rotated by the eccentric projections 530 612a direction.

The first auxiliary extension portion 640 applies a force to the first power transmission portion 146 as the link member 600 moves along the long axis 612a. Accordingly, the first sub-arm 140 rotates clockwise by a certain angle. The rotation angle of the first sub-arm 140 is approximately 20 degrees.

23 (c) and 24 (c), when the rotary shaft 500 rotates further by 90 degrees in the counterclockwise direction, the link member 600 moves in the direction A And moves in the opposite direction B direction. Accordingly, the link member 600 returns to the position shown in Figs. 23 (a) and 24 (a). At the same time, the first auxiliary arm 140 is rotated counterclockwise by the first auxiliary extension portion 640 and returned to the original position.

Referring to FIGS. 23 (d) and 24 (d), when the rotator unit 500 further rotates by 90 degrees counterclockwise, the link member 600 is rotated by the eccentric projections 530 And moves along the direction B of the long axis 612a. At this time, the first sub-arm 140 rotates counterclockwise by a certain angle. The rotation angle of the first sub-arm 140 is approximately 20 degrees.

Meanwhile, the second sub-arm 150 may rotate at the same angle with the first sub-arm 140 at the same time. However, the second auxiliary arm 150 rotates in a direction opposite to the first auxiliary arm 140 when viewed from the side.

As described above, the link member 600 can reciprocate by the distance between the top dead center and the bottom dead center of the eccentric protrusion 530 by the rotation of the rotating body unit 500.

The fixed gear unit 200 and the rotary shaft unit 500 and the link member 600 interact with each other to rotate the auxiliary arms 140 and 150 in a reciprocating manner. Drive '.

Hereinafter, the principle of the forward or reverse rotation of the injection arm 100 as washing water is sprayed from the injection arm 100 will be described.

FIG. 25 is a view showing a state in which washing water is sprayed from the main arm, FIG. 26 is a view showing a state in which washing water is sprayed from the auxiliary arm, FIG. 27 is a sectional view taken along line II- 28 is a view showing a state in which washing water is injected from the auxiliary arm and is reciprocally rotated.

25 to 28, the main arm 110 according to the embodiment of the present invention includes a plurality of upper jetting ports. Specifically, the first arm 113 may include a plurality of first top injection ports 123a, 123b, 123c, and 123d. Also, the second arm 114 may include a plurality of second upper jet orifices 124a, 124b, 124c, and 124d. When the main flow paths 117 and 118 are opened by the flow path switching unit 400, the plurality of first top injection ports 123a, 123b, 123c, and 123d and the plurality of second top injection ports 124a, 124b, 124c, and 124d, the wash water may be injected simultaneously.

At least some of the injection ports 123a and 123b of the plurality of first top injection ports 123a, 123b, 123c and 123d may be deflected so as to form an acute angle with respect to the main arm 110.

Accordingly, the injection arm 100 can rotate by the repulsive force generated by the injection of the washing water from the deflected injection ports 123a and 123b. That is, a predetermined torque value may be generated in the injection arm 100 by injecting washing water from the deflected injection ports 123a and 123b.

Some of the jetting ports 123c and 123d of the plurality of first upper jetting ports 123a, 123b, 123c and 123d are not deflected and can spray jetting water in a vertical direction.

At least some of the ejection openings 124a and 124b of the plurality of second top jet openings 124a, 124b, 124c and 124d may be deflected so that the direction of the washing water to be ejected is at an acute angle with the main arm 110. [

Accordingly, the injection arm 100 can be rotated by the repulsive force generated by the injection of the washing water from the injection ports 124a and 124b. That is, a predetermined torque value may be generated in the injection arm 100 by injecting washing water into the deflected injection holes 124a and 124b.

The torque applied to the injection arm 100 as the washing water is injected from the deflected injection ports 123a and 123b of the first upper injection port 123 and the torque acting on the deflected injection port 124a, and 124b, the torque applied to the injection arm 100 has the same direction.

The deflected jetting ports 123a and 123b of the first upper jetting port 123 and the deflected jetting ports 124a and 124b of the second upper jetting port 124 are positioned in the tangential direction of the rotational locus of the jetting arm 100 It can be deflected to spray wash water. In this case, the rotational force due to the washing water injection can be further increased.

The jetting ports 124c and 124d of the plurality of first upper jetting ports 124a, 124b, 124c and 124d are not deflected and can spray the washing water in a vertical direction.

As such, the plurality of upper jetting ports 123 and 124 may be deflected at different angles to jet wash water at various angles. When the transfer passage is opened by the flow path switching unit 400, a plurality of first upper auxiliary jet holes 143a, 143b, 143c and 143d and a plurality of second upper auxiliary jet holes 153a, 153b, 153c, And 153d.

In the case of the first auxiliary arm 140, at least a part of the deflected ejection openings 143a and 143b and the deflected ejection openings 143c and 143d may be formed like the main arm 110. [ At least a part of the deflected ejection openings 153a and 153b and the deflected ejection openings 153c and 153d may be formed in the second auxiliary arm 150 as well.

Deflected jetting ports 143a and 143b provided in the first auxiliary arm 140 are called first deflected jetting ports 143a and 143b and deflected jetting ports 153a and 153b provided in the second sub- May be referred to as second deflected ejection openings 153a and 153b. The uninjected ejection openings 143c and 143d provided in the first sub-arm 140 are called first vertical ejection openings 143c and 143d and the un-deflected ejection openings 143c and 143d provided in the second sub- The jetting ports 153c and 153d may be referred to as second vertical jetting ports 153c and 153d.

The injection arm 100 may have a torque generated by the injection of the washing water from the first deflection jetting ports 143a and 143b. Also, the injection arm 100 may have a torque generated by the injection of the washing water from the second deflection jetting ports 153a and 153b.

On the other hand, since the first auxiliary arm 140 and the second auxiliary arm 150 rotate in the same direction, the magnitude and direction of the torque due to the washing water injection can be changed.

Hereinafter, the directions of spraying the washing water in the deflected jetting ports 123a, 123b, 124a and 124b of the main arm 110 will be described. For convenience, the deflected jetting openings are called a first upper jetting port 123 and a second upper jetting port 124. Since the principle of injecting the washing water in the first upper injection opening 123 and the second upper injection opening 124 is the same, the second upper injection opening 124 will be used as a reference.

27, the spraying direction of the washing water sprayed from the second upper jetting port 124 of the second arm 114 is shown.

The second arm 114 is formed with a second main flow path 118 formed between the upper frame 120 and the lower frame 130. The washing water flowing through the arm holder 300 may flow into the second main flow path 118 and then be discharged to the outside through the second upper jet opening 124.

The second upper jet opening 124 may be deflected toward the upper left side with reference to the drawing. Accordingly, the direction A1 of the washing water sprayed from the second upper jet opening 124 can also be directed to the upper left side with reference to the drawing.

That is, the cleaning water injection direction A1 in the second upper jet opening 124 is deflected to an acute angle with the rotation axis V of the injection arm 100 as shown in the figure. Accordingly, the injection arm 100 can rotate due to the torque generated by the injection of the washing water through the second upper jet opening 124.

In addition, the first upper injection opening 123 provided in the first arm 113 may be deflected as well as the second upper injection opening 124. Accordingly, the torque generated by the injection of the washing water from the first upper injection opening 123 and the second upper injection opening 124 simultaneously acts on the injection arm 100.

Since the washing water is injected through a plurality of injection ports, a plurality of torques act on the injection arm 100. [ Therefore, the rotation direction of the injection arm 100 can be changed according to the resultant torque of the washing water injected from the first upper injection opening 123 and the second upper injection opening 124. When the torque of the washing water injected from the first upper injection opening 123 and the torque of the washing water injected from the second upper injection opening 124 are the same, Can be strengthened.

Hereinafter, the change in the spraying direction of the washing water during the reciprocating rotation of the first sub-arm 140 will be described.

28A shows a state in which the first auxiliary arm 140 does not rotate and FIG. 28B shows a state in which the first auxiliary arm 140 rotates clockwise as much as possible And FIG. 28C is a view showing a state in which the first auxiliary arm 140 is rotated in the counterclockwise direction as much as possible.

Referring to FIG. 28 (a), washing water is injected simultaneously in the first upper auxiliary jet opening 143 and the first lower auxiliary jet opening 144. The cleaning water injection direction A2 in the first upper auxiliary jet opening 143 and the cleaning water jetting direction A3 in the first lower auxiliary jet opening 144 can be directed to the upper right side with reference to the drawing.

The spraying directions A2 and A3 of the washing water sprayed from the first upper auxiliary jet opening 143 and the first lower auxiliary jet opening 144 may form an acute angle with the rotational axis V of the jetting arm 100 have. Accordingly, clockwise torque can be applied to the injection arm 100 by the wash water injected from the first upper auxiliary injection opening 143 and the first lower auxiliary injection opening 144.

28 (b), even when the first sub-arm 140 rotates clockwise as much as possible, the washing water injected from the first upper auxiliary jet opening 143 and the first lower auxiliary jet opening 144 The ejecting directions A2 and A3 of the ejecting arm 100 may be directed toward the right with respect to the rotational axis V of the ejecting arm 100. [ Therefore, even when the first sub-arm 140 rotates clockwise, a torque in the clockwise direction can be applied to the injection arm 100.

28 (c), even when the first sub-arm 140 rotates counterclockwise as much as possible, the first auxiliary sub-injection port 143 and the first sub- The spray directions A2 and A3 of the washing water may be injected toward the right with respect to the rotational axis V of the injection arm 100. [ Therefore, even when the first sub-arm 140 rotates counterclockwise, a torque in the clockwise direction can be applied to the injection arm 100.

The spraying direction A2 of the washing water sprayed from the first upper auxiliary jetting port 143 may be substantially parallel to the rotational axis V of the spraying arm 100. [ In this case, the direction of the torque acting on the injection arm 100 can be changed, which is problematic.

Therefore, the rotation angle of the first sub-arm 140 should be smaller than the injection angle of the first upper auxiliary jet opening 143. The spraying angle of the first upper auxiliary jet opening 143 is a distance corresponding to a direction in which the washing water jetting direction A2 in the first upper auxiliary jet opening 143 and the jetting direction (V) of the rotating shaft (100).

The angle of rotation of the first sub-arm 140 should be smaller than the angle of spray of the first lower sub-injection port 144. The spray angle of the first lower auxiliary jet opening 144 is set to be equal to the jetting direction of the washing water in the first lower auxiliary jet opening 144 in the state in which the first auxiliary arm 140 is not rotated, (V) of the rotating shaft (100).

The second sub-arm 150 may be operated in the same manner as the first sub-arm 140, so a detailed description thereof will be omitted.

Hereinafter, the influence of the vertical jet opening at the time of rotation of the first sub-arm 140 and the second sub-arm 150 will be described.

Even if washing water is sprayed from the first vertical jetting ports 143c and 143d, the rotation of the jetting arm 100 is hardly affected. When the first auxiliary arm 140 rotates, the direction of spraying the washing water sprayed from the first vertical jetting ports 143c and 143d is at an acute angle with the jetting arm 100. Therefore, Torque may act on the arm (100).

Since the second auxiliary arm 150 rotates at the same angle when the first auxiliary arm 140 rotates, the washing water injected from the first vertical jetting ports 143c and 143d and the washing water injected from the second vertical jetting ports 153c , 153d may be at the same angle. Accordingly, even if the first auxiliary arm 140 and the second auxiliary arm 140 rotate, the torque value of the washing water sprayed from the first vertical jetting ports 143c and 143d and the torque value of the second vertical jetting ports 153c, 153d are offset from each other.

Since the first auxiliary arm 140 and the second auxiliary arm 140 rotate at the same angle at the same time, the washing water sprayed from the first vertical jetting ports 143c and 143d and the washing water sprayed from the second vertical jetting ports 153c And 153d are parallel to each other, the torque values can be offset from each other. That is, when the washing water injected from the first vertical injection holes 143c and 143d and the washing water injected from the second vertical injection holes 153c and 153d are parallel to each other even if they do not have a vertical direction, The torque value can be canceled.

In addition, when the first sub-arm 140 and the second sub-arm 140 are rotated, the jetting angle of the washing water is lowered, so that the maximum jetting height of the washing water may also be lowered.

Accordingly, when the washing water is sprayed from the main injection ports 123 and 124, the injection arm 100 rotates counterclockwise (this is referred to as 'forward rotation' or 'one-direction rotation'), 143 and 153, the injection arm 100 may be rotated clockwise (referred to as 'reverse rotation' or 'other direction rotation').

Hereinafter, another embodiment of the injection arm assembly 10 will be described.

29 is a view showing a state in which a link member according to another embodiment of the present invention is mounted on an injection arm.

In this embodiment, there is a difference only in the structure of the link member 1600, and the characteristics of the remaining components are substantially the same as those described in FIGS. 1 to 24, and therefore, the remaining description will be omitted.

29, the link member 1600 according to the present embodiment includes an annular rim portion 610 and a plurality of extensions 620, 630, 1640, 1650 extending radially from the rim portion 610, . ≪ / RTI >

The plurality of extension portions 620, 630, 1640 and 1650 include a first auxiliary extension portion 1640 and a second auxiliary extension portion 1650 for reciprocally rotating the auxiliary arms 140 and 150. The first auxiliary extension 1640 may include a first link 1641 extending from the rim 610 and a second link 1642 connected to the first link 1641. That is, the first auxiliary extension portion 1640 may be bent many times.

The connecting portion 1643 connecting the first link 1641 and the second link 1642 may be elastically deformed such that the angle? Between the first link 1641 and the second link 1642 increases or decreases. It can be deformed. Accordingly, the first auxiliary extension portion 1640 is elastically deformable in the left and right direction within a certain angle range.

In addition, the first link 1641 or the second link 1642 may be made of a material that is elastically deformable. For example, the first link 1641 or the second link 1642 may be made of an engineering resin material. Accordingly, the first auxiliary extension portion 1640 is elastically deformable in the left and right direction within a certain angle range.

The first auxiliary arm 140 may not be rotatable due to any cause such as deposition of foreign matter. When the first auxiliary arm 140 is not rotatable, the movement of the link member 1600 is restricted, and the rotation of the injection arm 100 itself may also be stopped. In this case, if the first auxiliary extension portion 1640 is elastically deformable by an angle of a predetermined range, the rotation of the injection arm 100 itself is stopped together with the rotation of the first auxiliary arm 140 A situation in which the user is allowed to be prevented can be prevented.

The first auxiliary extension portion 1640 may further include stoppers 1645a and 1645b for limiting a rotation range of the first auxiliary arm 140. [ The stoppers 1645a and 1645b may be provided on both sides of the first auxiliary extension 1640.

The second auxiliary extension 1650 may have the same shape as the first auxiliary extension 1640.

30 is a view showing a state in which the link member according to another embodiment of the present invention is mounted on the injection arm.

In this embodiment, there is a difference only in the structure of the link member 2600, and the features of the remaining components are substantially the same as those described in Figs. 1 to 24, and therefore, the remaining contents will be omitted.

30, the link member 2600 according to the present embodiment includes an annular rim portion 610 and a plurality of extending portions 620, 630, 2640, and 2650 extending in a radial direction from the rim portion 610, . ≪ / RTI >

The plurality of extension portions 620, 630, 1640 and 1650 include a first auxiliary extension portion 2640 and a second auxiliary extension portion 2650 for reciprocally rotating the auxiliary arms 140 and 150. The first auxiliary extension portion 2640 includes an elastic link 2641 extending from the rim portion 610 and a power transmission portion 2643 provided at an end of the elastic link 2641.

The elastic link 2641 may be made of an elastically deformable material. In this case, the elastic modulus of the elastic link 2641 can be set to be deformable by the amount of torque generated by the injection of the washing water from the first auxiliary arm 140. Accordingly, the elastic link 2641 can be elastically deformed in the left and right direction within a certain angle range. That is, the elastic link 2641 is elastically deformable in a direction parallel to the reciprocating direction of the link member 2600. Accordingly, even when the auxiliary arm 140. 150 is not rotatable, the main body 110 can be rotated because the rotation of the main body 110 is possible.

The first auxiliary extension part 2640 may include stoppers 2645a and 2645b for limiting the rotation range of the first auxiliary arm 140. [ The stoppers 2645a and 2645b may be provided on both sides of the power transmitting portion 2643. [

The stoppers 2645a and 2645b may be formed in a rib shape in which a part of the first auxiliary extension part 2640 is extended. When the first sub-arm 140 is rotated over a predetermined range, the stoppers 2645a and 2645b contact the first sub-arm 140 on both sides to limit the rotation range.

The second auxiliary extension portion 2650 may have the same shape as the first auxiliary extension portion 2640.

31 is a view showing a state in which the fixed gear unit and the rotary gear unit according to another embodiment are engaged.

In the present embodiment, there is a difference only in the structure of the fixed gear portion and the rotary gear portion, and the characteristics of the remaining components are substantially the same as those described in the previous embodiment, and therefore, the rest will be omitted.

31, the stationary gear portion 1200 and the rotary gear portion 1500 are disposed to mesh with each other.

The rotary unit 1500 includes a rotary shaft receiving portion 1520 and a eccentric projection 1530. The rotary shaft receiving portion 1520 includes a rotary shaft 135 inserted in the injection arm 100. Unlike the previous embodiment, the rotation axis receiving portion 1520 may further protrude upward.

The rotation axis receiving portion 1520 may include an elastic portion 1523. The elastic portion 1523 can be compressed more than shown. Accordingly, the gear engagement between the stationary gear part 1200 and the rotary gear part 1500 can be released by spacing the fixed gear part 1200 upward.

The reason why the fixed gear portion 1200 and the rotary gear portion 1500 are spaced apart from each other is that even when the rotary gear portion 1500 is prevented from rotating due to foreign matter or the like, . When the rotary gear unit 1500 is not rotatable and the fixed gear unit 1200 and the rotary gear unit 1500 are engaged with each other, the rotary gear unit 1500 can restrict the rotation of the injection arm 100 Because. Herein, decoupling means that the meshing gears are spaced apart from each other to allow the injection arm 100 to rotate even when a specific component is disabled as described above.

Conversely, the elastic portion 1523 may perform a function of urging the rotating shaft portion 1500 toward the stationary gear portion 1200 so that the rotating shaft portion 1500 is in close contact with the stationary gear portion 1200 . Accordingly, the gear engagement between the rotary gear unit 1500 and the fixed gear unit 1200 can be made strong.

The fixed gear portion 1200 includes a plurality of gear teeth 1213 formed in an asymmetric shape. That is, the gear 1213 includes an inclined portion 1214 and a vertical portion 1215. The rotating machine unit 1500 also includes a plurality of gears 1513 formed in an asymmetrical shape. That is, the gear 1513 includes an inclined portion 1514 and a vertical portion 1515.

The gear teeth 1213 and 1513 provided in the fixed gear unit 1200 and the rotary gear unit 1500 are asymmetrical so that the rotary gear unit 1500 rotates around the fixed gear unit 1200 in a clockwise direction However, when the rotary gear unit 1500 rotates around the fixed gear unit 1200 in the clockwise direction, the vertical gear units 1215 and 1515 ) Can not be decoupled.

As described above, in the dishwasher 1 according to the present invention, since the auxiliary arms 140 and 150 are rotatably mounted on the main arm 110 and rotate separately from the rotation of the main arm 110, . Thus, the washing efficiency by the dishwasher 1 is increased.

Further, since the injection arm 100 can be rotated by a repulsive force generated by injecting washing water into the injection port, there is an advantage that a separate driving source is not required.

The rotation force of the injection arm 100 is transmitted to the auxiliary arms 140 and 150 by reciprocatingly rotating the fixed gear portion 200 by the interaction of the rotary member 500 and the link member 600 You can switch to force. Therefore, there is an advantage that a separate driving source for rotating the auxiliary arm 140, 150 is not needed.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: injection arm 110: main arm
140, 150: auxiliary arm 200: fixed gear portion
300: female holder 400: flow path switching part
500: rotator fisher part 600: link member

Claims (22)

A tub having a space for accommodating the object to be cleaned;
A sump provided at a lower portion of the tub and storing wash water;
A pair of main arms rotatably provided in the sump and supplied with washing water from the sump to spray the washing object and extending in a direction opposite to the rotation center;
A pair of main arms extending in a rotation radial direction of the main arm at a predetermined angle with respect to the main arm at the rotation center of the pair of main arms and rotatably mounted on the axis in an extending direction, A pair of auxiliary arms to be injected;
And a power transmitting portion for transmitting the rotational force of the main arm by the rotational force of the auxiliary arm,
The power transmission portion
A fixed gear portion fixed to the sump;
A rotary gear portion rotatably mounted on the main arm and engaged with the fixed gear portion by rotation of the main arm; And
And a link member connected to the rotation gear portion and the auxiliary arm and reciprocating by rotation of the rotation gear portion,
Wherein the rotary shaft portion is formed on one main arm of the pair of main arms,
Wherein when the washing water is sprayed by the main arm, the main arm and the auxiliary arm are rotated in one direction along the spraying direction of the main arm, and when the washing water is sprayed by the auxiliary arm, And is rotated in a direction opposite to the one direction according to the spraying direction of the auxiliary arm. The link member according to claim 1, wherein the link member
A pair of main extension portions extending along the extending direction of the pair of main arms and movably coupled along the main arms; And
And a pair of auxiliary extensions extending along the extending direction of the pair of auxiliary arms and pivotably coupled to the auxiliary arm. The connector according to claim 2, wherein the link member
A rim portion having a rectangular insertion hole into which the main arm is rotatably inserted is formed in a central portion,
Wherein the main extension portion extends along an extending direction of the pair of main arms at an outer peripheral surface of the rim portion and the auxiliary extension portion extends along an extending direction of the pair of auxiliary arms at an outer peripheral surface of the rim portion. 4. The apparatus according to claim 3, wherein the rotary gear portion
And an eccentric protrusion coupled to the rotating shaft and transmitting power to the link member as the rotating member is rotated. 5. The method of claim 4,
And an insertion portion into which the eccentric protrusion is inserted is formed in the depression so that the rotational force of the rotary gear portion is converted into a linear reciprocating motion in accordance with the rotation of the eccentric protrusion And the auxiliary arm reciprocates in a reciprocating manner. 6. The method of claim 5,
Wherein the rib is formed with a rib which is downwardly formed on the outer circumferential surface so as to cover the gear of the stationary gear portion and an opening portion is formed in the rib adjacent to the sink portion so that the gear of the stationary gear portion and the gear of the rotary gear portion are engaged with each other. dish washer. 6. The method of claim 5,
Wherein a plurality of contact portions protruding in the form of ribs are formed on an inner surface of the depressed portion to reduce friction with the rotary gear portion. 6. The apparatus of claim 5, wherein the insert
And a long hole having a predetermined length extending in a direction intersecting with the reciprocating direction of the auxiliary arm. 6. The apparatus of claim 5, wherein the insert
And a long hole having a predetermined length extending in a direction crossing the link member moving direction. 3. The method of claim 2,
Wherein the main extension is movably coupled to the lower portion of the main arm in a direction parallel to the reciprocating direction of the auxiliary arm. 5. The automatic transmission according to claim 4,
A rim portion formed on an outer circumferential surface of which a gear meshed with the fixed gear portion is formed,
A rotating shaft receiving portion formed at the center of the rim portion,
And the eccentric projections are spaced apart from the rotation center of the rotary shaft receiving portion. The method according to claim 1,
A main arm which is detachably inserted into the tub and which forms a path through which the washing water is moved to the main arm or the auxiliary arm and which supports the main arm to be rotated in a floating state in accordance with injection of the washing water of the main arm or the auxiliary arm, A holder;
And a flow path switching unit that is provided inside the arm holder so as to be able to ascend and descend and selectively supplies washing water to the main arm or the auxiliary arm in accordance with supply and interruption of the washing water. 13. The automatic transmission according to claim 12, wherein the fixed gear portion
And a rim portion in which the arm holder is inserted and fixed is formed at a central portion of the dishwasher, and the rim portion prevents the arm holder from being detached when washing water is supplied to the arm holder. 13. The method of claim 12,
And a water supply pump for intermittently supplying the sump washing water to the arm holder,
Wherein the flow path switching unit repeatedly switches the flow path of the washing water to the main arm or the auxiliary arm according to the intermittent supply of the water supply pump. 15. The method of claim 14,
The main arm has a first and a second extension portion rotatably coupled to the pair of auxiliary arms. The first and second extended portions are respectively provided with an auxiliary arm connecting member for rotatably supporting the auxiliary arm And the dish washer. 15. The method of claim 14,
Wherein the first and second main flow paths are formed in the first and second extended portions and the first and second main flow paths are formed in the first and second main flow paths or the first and second main flow paths, , And selectively opens and closes the two delivery channels. 13. The apparatus according to claim 12, wherein the arm holder
An inlet port which is inserted into the bottom surface of the tub and into which the washing water flows,
And an arm holder chamber coupled to a lower portion of the main arm and forming a path through which the wash water is moved to the main arm or the auxiliary arm,
Wherein the flow path switching unit is located inside the arm holder chamber and is moved up and down in the arm holder chamber according to supply and cutoff of the wash water to switch the flow path of the wash water. The dish washer according to claim 1, wherein the main arm and the auxiliary arm are rotated by a repulsive force generated as washing water is sprayed from an injection port formed in the main arm or the auxiliary arm. 19. The dishwasher of claim 18, wherein the ejection port formed in the main arm and the ejection port formed in the auxiliary arm have different ejection directions. The dish washer according to claim 1, wherein the number of gears formed in the fixed gear unit and the number of gears formed in the rotary unit are formed in a small relationship with each other. The dish washer according to claim 1, wherein the rotation axis and the rotation center of the main arm are formed in a direction parallel to the reciprocating direction of the link member. The dish washer according to claim 1, wherein the rotation axis and the rotation center of the main arm are formed in a direction parallel to the forming direction of the pair of main arms.

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