KR102358751B1 - Dish Washer - Google Patents

Abstract

A dish washing machine according to an embodiment of the present invention includes: a sump in which washing water is stored; a main arm provided in the sump to supply washing water from the sump; an auxiliary arm rotatably provided on the main arm and having an auxiliary flow path through which the washing water flows; a transmission flow path formed in the main arm and communicating with the auxiliary flow path; and an auxiliary arm connecting member provided on the main arm and rotatably supporting the auxiliary arm, wherein the auxiliary arm connecting member includes a flow pipe provided on the main arm and communicating with the auxiliary flow path; a shaft inserted into the auxiliary flow path; a protrusion formed to protrude from the shaft; and a support rib having one end connected to the flow tube and the other end connected to the shaft to support the shaft, and an inner circumferential surface of the auxiliary flow path is formed with a separation preventing portion that contacts the protrusion to prevent separation of the auxiliary arm.

Description

Dishwasher {Dish Washer}

The present invention relates to a dishwasher.

A dishwasher is a device that uses detergent and washing water to wash contaminants such as food residues on dishes or cooking utensils (hereinafter, 'to be washed').

The dishwasher includes a tub for providing a washing space, a dish rack provided in the tub to receive a washing object, a spray arm for spraying wash water to the rack, a sump for storing wash water, and a spray arm for storing wash water stored in the sump. It is common to include a supply path for supplying the

The dishwasher having the above-described configuration removes dirt from the washing object by spraying washing water on the washing object accommodated in the rack according to the washing course selected by the user, and the washing object on which the dirt removal is completed may be dried by hot air.

In Korean Patent Laid-Open Publication No. 10-2012-0126598, which is a prior document, an idea related to such a dishwasher is disclosed.

In the case of the dishwasher disclosed in the prior literature, it has a structure in which washing water is sprayed upward through the nozzle of the spray arm accommodated inside the tub.

On the other hand, when the washing water is sprayed on the bowl to be washed, it is necessary to evenly spray the washing water on the surface of the bowl. Therefore, it is necessary to spray the washing water from various angles. In the case of a conventional dishwasher, the spray nozzle rotates by rotating the spray arm, but it is necessary to diversify the spray angle for more efficient cleaning.

The problem to be solved by the present invention is to enable the auxiliary arm to be rotatably mounted to the main arm by the auxiliary arm connecting member.

Another object of the present invention is to enable the auxiliary arm to be rotatably connected to the main arm and supply washing water from the auxiliary arm connecting member.

Another object of the present invention is to prevent sagging of the auxiliary arm.

Another object of the present invention is to maintain the rigidity of the auxiliary arm connecting member.

Another object of the present invention is to prevent the auxiliary arm from being detached from the auxiliary arm connecting member while the auxiliary arm is rotatable.

Another object of the present invention is to strengthen the coupling between the auxiliary arm and the auxiliary arm connecting member.

Another object of the present invention is to facilitate removal of the auxiliary arm when the user needs it.

Another object of the present invention is to reciprocate the auxiliary arm by using the rotational force of the main arm without a separate driving device.

Another object of the present invention is to reduce the frictional force with the auxiliary arm connecting member generated when the auxiliary arm is rotated.

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

In order for the auxiliary arm to be rotatably connected to the main arm, a dishwasher according to an embodiment of the present invention includes: a sump in which washing water is stored; a main arm provided in the sump to supply washing water from the sump; an auxiliary arm rotatably provided on the main arm and having an auxiliary flow path through which the washing water flows; a transmission passage formed on the main arm and communicating with the auxiliary passage; and an auxiliary arm connecting member provided on the main arm and rotatably supporting the auxiliary arm, wherein the auxiliary arm connecting member includes: a flow pipe provided on the main arm and communicating with the auxiliary flow path; a shaft inserted into the auxiliary passage; a protrusion formed to protrude from the shaft; and a plurality of support ribs having one end connected to the flow pipe and the other end connected to the shaft to support the shaft, and an inner circumferential surface of the auxiliary passage is in contact with the protrusion to prevent separation of the auxiliary arm. A preventive portion is formed.

In order to supply washing water to the auxiliary arm through the auxiliary arm connection member, the dishwasher further includes a flow hole formed between each support rib through which the washing water flows, and the washing water flowing through the delivery passage passes through the flow hole. It may be characterized in that it moves to the auxiliary flow path.

In order to maintain the rigidity of the auxiliary arm connecting member, the dishwasher may further include a reinforcing rib provided on the shaft.

In addition, the reinforcing rib may be connected to any one of the plurality of support ribs.

In addition, the plurality of support ribs may include three support ribs, and each support rib may be disposed at an equal angle to each other with respect to the shaft.

In order to prevent the auxiliary arm from being separated from the auxiliary arm connecting member, the separation preventing portion may be formed to surround at least a portion of the shaft.

In order to strengthen the coupling between the auxiliary arm and the auxiliary arm connecting member, the dishwasher further includes a support part formed on an inner circumferential surface of the auxiliary flow path to support the shaft, wherein the support part surrounds at least a portion of the shaft. can be done with

In order to facilitate removal of the auxiliary arm, the dish washing machine is characterized in that when the auxiliary arm rotates to form a predetermined angle with the auxiliary arm connecting member, the coupling between the auxiliary arm and the auxiliary arm connecting member is released. can

In order to reduce frictional force with the auxiliary arm connecting member generated when the auxiliary arm is rotated, the dishwasher may include a bearing part provided on an outer circumferential surface of the flow pipe; and a contact part provided on the auxiliary arm and in contact with the bearing part.

In order to rotate the auxiliary arm using the rotational force of the main arm without a separate driving device, the dishwasher is fixed to the sump and includes a fixed gear unit having gear teeth formed on an outer circumferential surface thereof; a rotating gear unit rotatably mounted on the main arm and rotating in engagement with the gear teeth of the fixed gear unit by rotation of the main arm; and a link member connected to the rotation gear unit, the main arm, and the auxiliary arm, wherein the link member is moved by rotation of the rotation gear unit to push and rotate each auxiliary arm. .

According to an embodiment of the present invention, since the auxiliary arm can be rotatably mounted to the main arm using the auxiliary arm connecting member, the washing water spraying direction is diversified, thereby increasing washing efficiency.

In addition, since the auxiliary arm connecting member supports the auxiliary arm while being inserted into the auxiliary arm, it is possible to prevent the auxiliary arm from sagging.

In addition, since the shaft is provided with a reinforcing rib, it is possible to maintain the rigidity of the auxiliary arm connecting member.

In addition, since the auxiliary arm connecting member is provided, frictional force that may be generated when the auxiliary arm is rotated is reduced.

In addition, since the auxiliary arm is separated from the auxiliary arm connecting member only when the auxiliary arm is rotated at a specific angle, it is possible to prevent unintentional detachment.

In addition, when the user needs, the auxiliary arm can be easily removed by rotating the auxiliary arm at a specific angle.

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 .
3 is an exploded perspective view of the spray arm assembly of FIG. 2 ;
4 is a cross-sectional view taken along line I-I` of the spray arm assembly of FIG. 2 .
FIG. 5 is a view showing a bottom surface of the spray arm of FIG. 3 .
6 is an exploded view of the spray arm of FIG. 5 .
7 to 10 are views for explaining an assembly sequence of the spray arm assembly of FIG. 3 .
11 is a view showing a bottom surface of the injection arm assembly according to the rotation angle of the rotation gear unit.
12 is a side view of the spray arm assembly of FIG. 11 ;
13 is a perspective view of an auxiliary arm connecting member;
14 is a cross-sectional perspective view of a front end of an auxiliary arm;
15 is a cross-sectional perspective view of the rear end of the auxiliary arm.
16 is a view showing a state in which the auxiliary arm rotates in combination with the auxiliary arm connecting member.
17 to 19 are views sequentially showing a state in which the auxiliary arm and the auxiliary arm connecting member are coupled.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

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

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 selectively opening and closing the washing space, and the tub ( 2) is provided inside the rack 4 and accommodates the object to be washed, the sump 5 is provided inside the tub 1 and stores washing water, and the rack 3 is provided inside the tub 1 It may include a spray arm assembly 10 for spraying washing water to the washing target accommodated in the.

The rack 4 may be mounted to be withdrawn from the front of the tub 2 . Accordingly, the user can accommodate the object to be washed by drawing the rack 4 toward the front of the tub.

The sump 5 may include a sump cover 20 and a sump discharge unit 30 provided in the sump cover 20 . The sump 5 may receive washing water from the outside through the water supply unit 6 , and may discharge the washing water sprayed into the tub 2 through the sump discharge unit 30 . Also, although not shown, a water pump for transferring the washing water stored in the sump 5 to the spray arm assembly 10 may be provided inside the sump 5 .

The sump discharge part 30 may be provided with a washing water recovery part 33 for recovering the washing water sprayed into the tub 2 . Foreign substances such as food waste contained in the washing water may be filtered out by a sieve provided in the washing water recovery unit 33 . The washing water recovered into the sump 5 through the washing water recovery unit 33 may be supplied back to the spray arm assembly 10 by a water pump provided in the sump 5 . That is, the washing water supplied through the water supply unit 6 may be used multiple times.

The spray arm assembly 10 is mounted on the sump cover 20 to spray the washing water stored in the sump 4 to the washing object stored in the rack. The spray arm assembly 10 includes a spray arm 100 for spraying washing water, a fixed gear 200 mounted on the sump cover 20 to rotatably support the spray arm 100, and an arm holder. (300) may be included.

The washing water introduced through the water supply part 6 flows through the sump 5 and flows into the jet arm assembly 10 , and the washing water flowing into the jet arm assembly 10 flows into the jet arm 100 . It can be sprayed to the cleaning target by Meanwhile, the spray arm assembly 10 is directly connected to the water supply unit 6 to directly spray the washing object without passing through the sump 5 .

The spray 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 one. In addition, a plurality of the spray arm assembly 10 may be provided to spray the washing water to the upper and lower portions of the rack 4 , respectively.

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

3 is an exploded perspective view of the spray arm assembly of FIG. 2 ;

Referring to FIG. 3 , the injection arm assembly 10 according to an embodiment of the present invention includes the injection arm 100 , the fixed gear unit 200 , the arm holder 300 , the flow path switching unit 400 , and , it may include a rotation gear 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 as a pair as shown. A plurality of flow paths through which the washing water provided from the sump 5 flows may be formed in the main arm 110 .

Upper injection holes 123 and 124 through which the washing water introduced into the main arm 110 is sprayed may be formed on the upper side of the main arm 110 . Washing water flowing into the main arm 110 from the sump 5 may be sprayed upward of the main arm 110 through the upper injection holes 123 and 124 . The washing water sprayed from the upper injection ports 123 and 124 may be directed toward the washing object.

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

The auxiliary arms 140 and 150 may be rotated within a predetermined angle range by the link member 600 . Upper auxiliary injection holes 143 and 153 for spraying washing water flowing into the main arm 110 may be formed in the auxiliary arms 140 and 150 as well.

The main arm 110 may include a first extension portion 111 and a second extension portion 112 extending radially with respect to the arm holder coupling portion 180 . The auxiliary arms 140 and 150 may be rotatably mounted to the first extension part 111 and the second extension part 112 , respectively.

A first delivery passage and a second delivery passage through which the washing water introduced from the sump 5 flows may be formed in the first extension 111 and the second extension 112 . The washing water flowing through the first delivery passage and the second delivery passage may flow to the auxiliary arms 140 and 150, respectively.

The auxiliary arms 140 and 150 include a first auxiliary arm 140 rotatably connected to the first extension part 111 and a second auxiliary arm rotatably connected to the second extension part 112 ( 150) may be included. A portion of the washing water flowing into the main arm 110 includes a first auxiliary flow path 141 (refer to FIG. 14 ) formed inside the first auxiliary arm 140 and a second auxiliary arm formed inside the second auxiliary arm 150 . 2 It can flow into the auxiliary flow path.

A first upper auxiliary injection hole 143 may be formed in the first auxiliary arm 140 , and a second upper auxiliary injection hole 153 may be formed in the second auxiliary arm 150 . Accordingly, the washing water flowing into the first auxiliary flow path 141 (refer to FIG. 14 ) formed in the first auxiliary arm 140 is sprayed through the first upper auxiliary injection hole 143 , and the second auxiliary arm 150 . Washing water flowing into the second auxiliary flow path formed in the inner space of the may be sprayed through the second upper auxiliary injection port 153 .

The injection arm 100 may be rotated by a repulsive force generated when washing water is sprayed through the upper injection holes 123 and 124 or the upper auxiliary injection holes 143 and 153 . That is, the spray arm 100 may be rotated by a repulsive force generated by spraying washing water without a separate driving device such as a motor.

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 the opposite direction to the first arm 113 . can do. A first upper injection hole 123 may be formed in the first arm 113 , and a second upper injection hole 124 may be formed in the second arm 114 .

The first upper injection hole 123 may be formed in plurality along the length direction of the first arm 113 . A plurality of second upper injection holes 124 may be formed along the longitudinal direction of the second arm 114 .

The spray arm 100 may be rotated in one direction by a repulsive force generated when washing water is sprayed through the first upper injection hole 123 and the second upper injection hole 124 . At this time, since the washing water is sprayed through the plurality of injection holes, a plurality of repulsive forces are generated. Accordingly, the first upper injection hole 123 and the second upper injection hole 124 are arranged such that the resultant force of a plurality of repulsive forces generated by the washing water injection rotates the spray arm 100 in one direction.

The washing water introduced into the spray arm 100 may flow to the main arm 110 and be sprayed into the upper spray holes 123 and 124 . In addition, the washing water flowing into the spray arm 100 may flow to the auxiliary arms 140 and 150 and be sprayed into the upper auxiliary spray holes 143 and 153 .

The fixed gear unit 200 may be fixed to the sump cover 20 by a gear fixing unit 22 provided on the sump cover 20 . The fixed gear unit 200 is disposed to mesh with the rotation gear unit 500 .

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

The arm holder 300 may be rotatably fixed to the sump cover 20 in a state in which it is coupled to the spray arm 100 . The washing water supplied from the sump 5 flows into the arm holder 300 and then is supplied to the spray 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 changing unit 400 is accommodated in the arm holder 300 , and may serve to switch the flow path of the washing water supplied from the arm holder 300 to the spray arm 100 .

The rotation gear unit 500 may be rotatably mounted on the bottom surface of the injection arm 100 . When the injection arm 100 rotates, the rotating gear unit 500 moves in a circular motion along the circumference of the fixed gear unit 200 fixed to the sump cover 20 while simultaneously moving the fixed gear unit 200 to the fixed gear unit 200 . It can be interlocked and rotated.

The link member 600 may be mounted on the spray arm 100 . The link member 600 may reciprocally rotate the auxiliary arms 140 and 150 as the rotation gear unit 500 rotates. A specific operating principle will be described later.

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

4 is a cross-sectional view of the spray arm assembly of FIG. 2 taken along line I-I', and FIGS. 5 to 16 are views for explaining each component of the spray arm assembly of FIG. 3 .

Referring to FIG. 4 , the spray arm assembly 10 is fastened to the sump cover 20 . First, in the arm holder 300 , the extended part 315 formed in the arm holder 300 is fastened to the arm holder fastening part 23 provided in the sump cover 20 , so that the sump cover 20 . may be rotatably fixed to the

Next, the fastening part 223 provided in the fixed gear unit 200 is fastened to the gear fixing unit 22 provided in the sump cover 20 . Accordingly, the fixed gear unit 200 is coupled to the sump cover 20 . Unlike the arm holder 300 , the fixed gear unit 200 is fixed to be non-rotatable.

The rotation gear unit 500 is inserted into the gear rotation shaft 135 provided in the injection arm 100 . Accordingly, the rotation gear 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 the guide protrusions 136 and 137 provided on the spray arm 100 . In addition, the eccentric protrusion 530 provided in the rotary gear part 500 may be inserted into the link member 600 . Due to the rotation of the fixed gear unit 200 , the eccentric projection 530 may reciprocate the link member 600 within a predetermined range.

The fastening protrusion 182 provided in the injection arm 100 is inserted into the fastening protrusion receiving part 332 provided in the arm holder 300 . Accordingly, the arm holder 300 is coupled to the spray arm 100 .

Main flow paths 117 and 118 through which the washing water introduced from the arm holder 300 flows may be formed in the injection arm 100 . Specifically, the main flow paths 117 and 118 include a first main flow path 117 formed inside the first arm 113 and a second main flow path formed inside 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 wall 116 . The washing water flowing through the first main flow path 117 may be sprayed to the outside through the first upper jetting hole 123 , and the washing water flowing through the second main flow path 118 may be discharged through the second upper jetting port 124 . ) through which it can be sprayed to the outside. The main flow paths 117 and 118 may be referred to as 'wash water flow paths'.

The flow path switching unit 400 is accommodated in the arm holder chamber 320 provided in 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 . When stopped, as the water pressure inside the arm holder chamber 320 is lowered, the flow path switching unit 400 may move downward.

In addition, the washing water accommodated in the arm holder chamber 320 may flow into the main arm 110 .

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

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

Lower injection holes 133 and 134 through which the washing water introduced into the main arm 110 is sprayed may be formed in the lower frame 130 . The washing water flowing into the main arm 110 may be sprayed downward of the main arm 110 through the lower injection holes 133 and 134 . The upper injection holes 123 and 124 and the lower injection holes 133 and 134 may be collectively referred to as a 'main injection hole'.

When the washing water is sprayed upward from the upper injection ports 123 and 124, a repulsive force is generated downward of the main arm 110, and when the washing water is injected downward from the lower injection ports 133 and 134, the main A repulsive force may be generated upwards of the arm 110 . As such, when the washing water is sprayed only from one of the upper or lower injection ports, a repulsive force may be applied to the main arm 110 upward or downward, which may strain the coupling of the injection arm assembly 10 . Therefore, the washing water flowing into the main arm 110 is simultaneously sprayed through the upper jetting ports 123 and 124 and the lower jetting ports 133 and 134 , thereby acting on the main arm 110 by spraying the washing water. It is possible to offset the repulsive force in the vertical direction.

The main arm 110 may include a first outlet 111a formed in the first extension 111 and a second outlet 112b formed in the second extension 112 . Some 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 some of the washing water flows into the second outlet 112b. may be introduced into the second auxiliary arm 150 through the

As shown, the first auxiliary arm 140 is disposed to form an acute angle with the first arm 113 , and the second auxiliary arm 150 is disposed to form an acute angle with the second arm 114 . can However, it is not limited to such a shape and may be appropriately changed according to design. For example, the first arm 113 and the second arm 114 are arranged to form an acute angle with each other, and the first auxiliary arm 140 and the second auxiliary arm 150 are arranged to form an acute angle with each other. can be

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

The washing water flowing into the auxiliary arms 140 and 150 is simultaneously sprayed through the upper auxiliary injection holes 143 and 153 and the lower auxiliary injection holes 144 and 154, so that the auxiliary arms 140 and 150 are sprayed with the washing water. ) can cancel the repulsive force in the up-down direction.

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

The main arm 110 may include a gear rotation shaft 135 inserted into the rotation gear unit 500 to serve as a rotation shaft of the rotation gear unit 500 . The gear rotation shaft 135 may be formed to protrude from the lower frame 130 . Meanwhile, the gear rotation shaft 135 may be disposed on the lower surface of the first arm 113 as shown, but is not limited thereto.

The injection arm 100 may include guide protrusions 136 and 137 for guiding the movement of the link member 600 . The guide protrusions 136 and 137 include a first guide protrusion 136 provided on the lower surface of the first arm 113 and a second guide protrusion 137 provided on the lower face of the second arm 114 . may include The first guide protrusion 136, the gear rotation shaft 135, and the second guide protrusion 137 may be disposed on a straight line 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 transmission units 146 and 156 may be formed of protrusions protruding downward from the bottom surfaces of the auxiliary arms 140 and 150 . When the link member 600 transmits the power received from the rotation gear unit 500 to the power transmission units 146 and 156 , the auxiliary arms 140 and 150 may reciprocate and rotate. The first auxiliary arm 140 is provided with a first power transmission unit 146 , and the second auxiliary arm 150 is provided with a second power transmission unit 156 .

The main arm 110 may include an arm holder coupling unit 180 provided in the lower frame 130 . The arm holder coupling part 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 . As the fastening protrusion 182 is fastened to the arm holder 300 , the main arm 110 may be fixed to the arm holder 300 .

The arm holder accommodating tube 181 may be formed to extend downwardly from the lower frame 130 . In addition, the arm holder accommodating tube 181 may have a cylindrical shape and may be in contact with the arm holder 300 .

As the fastening protrusion 182 is fastened to the arm holder 300 , the main arm 110 may be fixed to the arm holder 300 . A plurality of the fastening protrusions 182 may be provided along the outer circumferential surface of the arm holder coupling part 180 .

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

The plurality of inlets 138a, 138b, 138c, and 138d include a first inlet 138a communicating with the first main channel 117 and a second inlet 138b communicating with the second main channel 118 . includes Accordingly, the washing water flowing into the first inlet 138a flows into the first main flow path 117 and is sprayed into the injection holes 123 and 133 provided in the first arm 113, and the second inlet ( The washing water introduced into 138b) may flow into the second main flow path 118 and may be sprayed into the injection holes 124 and 134 provided in the second arm 114 .

The plurality of inlets (138a, 138b, 138c, 138d) includes 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 communicate with each other to form the first delivery passage, and the second outlet 112b and the fourth inlet 138d communicate with each other to form the second to form a transmission path. The first transmission passage and the second transmission passage may be partitioned from each other by the partition wall 116 .

The washing water flowing into the third inlet 138c flows to the first auxiliary arm 140 through the first delivery passage, and then is sprayed into the injection ports 143 and 144 provided in the first auxiliary arm 140 . The washing water flowing into the fourth inlet 138d flows to the second auxiliary arm 150 through the second delivery passage, and then the injection holes 153 and 154 provided in the second auxiliary arm 150 . can be sprayed with

The flow path switching unit 400 may open or close the plurality of inlets 138a, 138b, 138c, and 138d as it rises and descends in the arm holder 300 .

The auxiliary arm connecting member 160 may be inserted into the auxiliary arms 140 and 150 to rotatably support the auxiliary arms 140 and 150 . Internal structures of the auxiliary arm connecting member 160 and the auxiliary arms 140 and 150 will be described later.

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 rotatably connected to the main arm 110 .

7 to 10 are views for explaining an assembly sequence of the spray arm assembly of FIG. 3 .

7 to 10 , first, the injection arm 100 is coupled to the rotation gear unit 500 (see FIG. 17 ). The rotation gear unit 500 may be inserted into the gear rotation shaft 135 provided in the injection arm 100 .

Next, the link member 600 is additionally mounted to the injection arm 100 (see FIG. 18 ). The link member 600 is first connected to the power transmission units 146 and 156 and then is 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 gear part 500 is inserted into the insertion part 625 provided in the link member 600 .

The first power transmission part 146 is inserted into the first locking part 643 provided in the link member 600 . The power transmission unit 146 may be provided with a separation prevention rib 146a to prevent separation from the first locking portion 643 . The separation preventing rib 146a may extend toward the center of the spray arm 100 as shown. Similarly, the second power transmission unit 156 may include a separation prevention rib having the same shape as the separation prevention rib 146a provided in the first power transmission unit 146 .

The second guide protrusion 137 is inserted into the second guide part 633 provided on the link member 600 . The second guide protrusion 137 may be formed of two elastic bodies 137a and 137b as shown. In order to prevent the two elastic bodies 137a and 137b from being separated from the second guide part 633, ends may extend in the horizontal direction. When the second guide protrusion 137 is inserted into the second guide part 633 , the two elastic bodies 137a and 137b may be bent in a direction toward each other. After the second guide protrusion 137 is inserted into the second guide part 633 , the two elastic bodies 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 unit 200 is additionally coupled to the injection arm 100 (see FIG. 19 ). The fixed gear part 200 is mounted to surround the circumference of the arm holder coupling part 180 . That is, the arm holder coupling part 180 is inserted into the open part of the fixed gear part 200 . At this time, the gear teeth of the fixed gear unit 200 are engaged with the gear teeth of the rotation gear unit 500 .

Next, the arm holder 300 is additionally coupled to the spray arm 100 (see FIG. 20 ). First, after inserting the arm holder 300 into the arm holder coupling part 180 , when the arm holder 300 is rotated by a predetermined angle, the fastening protrusion 182 is moved to the fastening protrusion receiving part 332 . is accepted in Accordingly, the arm holder 300 may be coupled to the arm holder coupling unit 180 .

Next, as the fastening part 223 is fastened to the sump cover 20 , the fixed gear part 200 is fixed to the sump cover 20 . At the same time, the arm holder 300 may be inserted into the sump 5 .

Hereinafter, a principle in which the auxiliary arms 140 and 150 reciprocate and rotate as the rotation gear unit 500 rotates will be described.

11 is a view showing a bottom surface of the spray arm assembly according to the rotation angle of the rotary gear unit, and FIG. 12 is a side view of the spray arm assembly of FIG. 11 .

Specifically, (a), (b), (c), (d) of FIG. 11 shows the injection arm assembly 10 when the rotation gear unit 500 rotates 0 degrees, 90 degrees, 180 degrees, and 270 degrees, respectively. ) is a view showing the bottom, and (a), (b), (c), (d) of FIG. 12 are the injection arm assemblies of FIGS. 11 (a), (b), (c), (d), respectively It is a side view of (10).

Referring to FIGS. 11A and 12A , in an initial state in which the rotation gear part 500 does not rotate, the eccentric protrusion 530 is located on one side of the insertion part 625 . In this case, the first auxiliary arm 140 is disposed parallel to the main arm 110 .

11 (b) and 12 (b), when the rotation gear part 500 rotates 90 degrees counterclockwise, the link member 600 is the long axis ( 612a), it moves along the A direction.

The first auxiliary extension part 640 applies a force to the first power transmission part 146 as the link member 600 moves along the long axis 612a direction. Accordingly, the first auxiliary arm 140 rotates by a predetermined angle in the clockwise direction. The rotation angle of the first auxiliary arm 140 is about 20 degrees.

11 (c) and 12 (c), when the rotation gear unit 500 is rotated further in the counterclockwise direction by 90 degrees, the link member 600 is the A-direction on the long axis 612a It moves in the opposite direction, B direction. Accordingly, the link member 600 is returned to the position shown in Figs. 11 (a) and 12 (a). At the same time, the first auxiliary arm 140 is rotated counterclockwise by the first auxiliary extension part 640 to return to its original position.

11(d) and 12(d), when the rotation gear part 500 is rotated by 90 degrees in the counterclockwise direction, the link member 600 is moved by the eccentric projection 530. It moves along the B direction among the long axis 612a directions. At this time, the first auxiliary arm 140 rotates by a predetermined angle in the counterclockwise direction. The rotation angle of the first auxiliary arm 140 is about 20 degrees.

Meanwhile, the second auxiliary arm 150 may rotate to the link member 600 at the same time as the first auxiliary arm 140 . However, the second auxiliary arm 150 rotates in the opposite direction to the first auxiliary arm 140 when viewed from the side.

As such, the link member 600 may reciprocate by the distance between the top dead center and the bottom dead center of the eccentric protrusion 530 by the rotation of the rotation gear unit 500 .

The fixed gear unit 200, the rotating gear unit 500, and the link member 600 interact with each other to rotate the auxiliary arms 140 and 150 reciprocally, so they are collectively referred to as 'rotation'. It can be called 'drive part'.

As such, the auxiliary arms 140 and 150 are reciprocally rotated by the link member 600 , and the auxiliary arm connection member 160 rotatably supports the auxiliary arms 140 and 150 . Hereinafter, a detailed structure of the auxiliary arm connecting member 160 and internal structures of the auxiliary arms 140 and 150 will be described. Meanwhile, since the shapes of the first auxiliary arm 140 and the second auxiliary arm 150 are the same, the first auxiliary arm 140 will be described as a reference.

13 is a perspective view of an auxiliary arm connecting member, FIG. 14 is a cross-sectional perspective view of the auxiliary arm in which a front end is cut, and FIG. 15 is a cross-sectional perspective view of a rear end of the auxiliary arm.

13 to 15 , the auxiliary arm connecting member 160 according to an embodiment of the present invention is connected to the insertion tube 162 inserted into the main arm 110 and the insertion tube 162 . An extension tube 164 through which the washing water introduced from the insertion tube 162 flows, a shaft 166 connected to the extension tube 164, a protrusion 168 protruding from the shaft 166, and one end The part may include a plurality of support ribs 165a , 165b , 165c connected to the extension pipe 164 and the other end connected to the shaft 166 . The insertion tube 162 and the extension tube 164 may be collectively referred to as a flow tube.

The shaft 166 is inserted into the first auxiliary flow path 141 formed inside the first auxiliary arm 140 . The washing water provided from the main arm 110 flows through the first auxiliary flow path 141 , and the washing water flowing through the first auxiliary flow path 141 is sprayed to the outside through the auxiliary injection holes 143 and 144 .

The protrusion 168 may have a hook shape as shown. A separation preventing part 145 in contact with the protrusion 168 may be provided on an inner circumferential surface of the first auxiliary flow path 141 .

The separation preventing part 145 may be formed to protrude downward from the upper surface of the first auxiliary flow path 141 . In addition, the separation preventing part 145 may be formed to surround at least a portion of the shaft. Accordingly, even when the first auxiliary arm 140 rotates within a predetermined range while being fastened to the auxiliary arm connecting member 160 , the first auxiliary arm 140 is connected to the auxiliary arm connecting member 160 . escape is prevented.

The first auxiliary arm 140 may further include a support part 147 protruding upward from the bottom surface of the first auxiliary flow path 141 . The support part 147 may be formed to surround at least a portion of the shaft 168 .

That is, the separation preventing part 145 may be configured to surround the shaft 168 from the upper side, and the support part 147 may be configured to surround the shaft 168 from the bottom side. Accordingly, it is possible to perform a role of smoothing the relative rotation between the shaft 168 and the first auxiliary arm (140).

Also, as the separation preventing part 145 contacts the shaft 166 , a load of the first auxiliary arm 140 may be applied to the shaft 166 .

The insertion tube 162 is inserted into the first outlet 111a. Accordingly, the insertion tube 162 communicates with the delivery passage, and the washing water flows in from the main arm 110 . In addition, the insertion tube 162 may be provided with a flow preventing portion 161 for pressing the inner peripheral surface of the delivery passage.

The flow prevention part 161 may be formed to protrude from the surface of the insertion tube 162 . In addition, the flow prevention part 161 may be formed in a shape that is turned outward after a portion of the insertion tube 162 is cut.

A limiting portion 163 disposed between an end of the first auxiliary arm 140 and an end of the first extension 111 may be formed on an outer circumferential surface of the insertion tube 162 . The limiting part 163 may serve to limit the insertion range of the insertion tube 162 . Accordingly, the auxiliary arm connecting member 160 may be fixed to the main arm 110 .

A plurality of bearing parts 167a , 167b , and 167c protrudingly formed may be provided on the outer circumferential surface of the extension pipe 164 . The plurality of bearing parts 167a , 167b , and 167c may contact an inner circumferential surface of the first auxiliary arm 140 .

The first auxiliary arm 140 is provided on the inner circumferential surface of the first auxiliary flow path 141 and may further include a contact portion 148 in contact with the plurality of bearing portions 167a, 167b, and 167c. When the first auxiliary arm 140 rotates, the plurality of bearing parts 167a , 167b , 167c and the contact part 148 may rub against each other.

The contact portion 148 may be formed with outlets 149a and 149b communicating with the outside of the first auxiliary arm 140 . The washing water flowing backward from the first auxiliary flow path 141 toward the contact portion 148 may be discharged to the outside of the first auxiliary arm 140 through the outlets 149a and 149b. The outlets 149a and 149b include a first outlet 149a formed at the front of the first power transmitting unit 146 and a second outlet 149b formed at the rear of the first power transmitting unit 146 . may include

The plurality of bearing parts (167a, 167b, 167c) includes a first bearing part (167a) made of a plurality of protrusions, a first bearing part (167b) and a first bearing part (167b) made of an annular rib along the outer circumferential surface of the extension pipe (164). A two-bearing portion 167c may be included.

That is, the first auxiliary arm 140 is in contact with the auxiliary arm connecting member 160 at the points of the contact portion 148 and the separation preventing portion 145 , so that the load is applied by the auxiliary arm connecting member 160 . can be supported Accordingly, deflection of the first auxiliary arm 140 may be prevented.

Accordingly, deflection of the first auxiliary arm 140 may be prevented.

The plurality of support ribs 165a , 165b and 165c may serve to support the shaft 166 . Each of the support ribs 165a , 165b , and 165c may be disposed to form an angle with each other about the shaft 166 .

The plurality of support ribs 165a, 165b, and 165c include a first support rib 165a disposed below the shaft 166, a second support rib 165b disposed above the shaft 166, and A third support rib 165c may be included.

A flow hole 165d through which washing water can flow may be formed between each of the support ribs 165a, 165b, and 165c. Specifically, a flow hole 165d may be formed between the first support rib 165a and the third support rib 165c. A flow hole may also be formed between the first support rib 165a and the second support rib 165b and between the second support rib 165b and the third support rib 165c.

The washing water introduced into the insertion tube 162 may be discharged to the flow hole 165d through the extension tube 164 . The washing water discharged through the flow hole 165d may flow into the first auxiliary flow path 141 and may be sprayed through the auxiliary injection holes 143 and 144 .

The auxiliary arm connecting member 160 may further include a reinforcing rib 169 for reinforcing the strength of the shaft 166 . The reinforcing rib 169 may extend downwardly from the lower side of the shaft 166 . Also, the reinforcing rib 169 may be connected to the first support rib 165a.

Unlike the illustration, the insertion tube 162 may be integrally formed with the main arm 110 . In addition, not only the insertion tube 162 but also the extension tube 164 may be integrally formed with the main arm 110 . That is, the insertion tube 162 and the extension tube 164 may constitute a part of the delivery passage. However, when the auxiliary arm connecting member 160 and the main arm 110 are integrally formed, it is difficult to replace the auxiliary arm connecting member 160 .

16 is a view showing a state in which the auxiliary arm rotates in combination with the auxiliary arm connecting member.

Specifically, (a) of FIG. 16 shows a state in which the first auxiliary arm 140 is disposed in its original position, and (b) of FIG. 16 shows that the first auxiliary arm 140 is rotated counterclockwise. It is a drawing showing one

Referring to FIG. 16A , the first auxiliary arm 140 is rotatable within a range in which the protrusion 168 and the separation preventing unit 145 can contact each other. That is, the first auxiliary arm 140 is rotatable within the angular range θ1 occupied by the separation preventing unit 145 . In this case, the support part 147 may support the shaft 166 .

Referring to (b) of FIG. 16 , when the first auxiliary arm 140 is rotated counterclockwise at a predetermined angle θ2 , the first auxiliary arm 140 is connected to the auxiliary arm connecting member 160 . ) can be escaped. In other words, when the first auxiliary arm 140 rotates at a predetermined angle θ2 , the coupling between the first auxiliary arm 140 and the auxiliary arm connecting member 160 may be released.

Accordingly, when the user needs, the first auxiliary arm 140 can be detached from the auxiliary arm connecting member 160 by rotating the first auxiliary arm 140 at a predetermined angle θ2 . That is, since the auxiliary arm connecting member 160 is provided on the injection arm 100 , the first auxiliary arm 140 is rotatably mounted on the main arm 110 and at the same time, it is easy to remove it. .

The maximum rotation angle θ2 of the first auxiliary arm 140 may be set to approximately 110 degrees in the drawing, but is not limited thereto and may be appropriately changed according to design. The maximum rotation angle θ2 should be designed to be larger than the rotation range of the first auxiliary arm 140 due to the reciprocating motion of the link member 600 .

17 to 19 are views sequentially showing a state in which the auxiliary arm and the auxiliary arm connecting member are coupled.

17 to 19 , first, the auxiliary arm connecting member 160 is inserted into the main arm 110 (see FIG. 17 ). In this case, the insertion range of the auxiliary arm connecting member 160 may be limited as the limiting part 163 is caught on the end of the first extension part 111 .

Next, the first auxiliary arm 140 is inserted into the auxiliary arm connecting member 160 in the obliquely rotated state. Specifically, the first auxiliary arm 140 has the auxiliary arm connecting member 160 in a state in which the protrusion 168 is rotated to an angle range that does not contact the separation preventing portion 145 and the support portion 147 . is inserted (see FIG. 18).

Next, the first auxiliary arm 140 is rotated to its original position (refer to FIG. 19). At this time, the positional relationship between the protrusion 168 and the separation preventing part 145 is as shown in (a) of FIG. 16 .

Next, the first power transmission unit 146 provided in the first auxiliary arm 140 is inserted into the first locking unit 643 . Since the first auxiliary arm 140 rotates only within the range of motion of the link member 600, unless the user arbitrarily releases the coupling between the first auxiliary arm 140 and the link member 600, The first auxiliary arm 140 does not separate from the auxiliary arm connecting member 160 .

A predetermined distance (d) may be spaced between the first extension part 111 and the first auxiliary arm 140 . Accordingly, when the first auxiliary arm 140 rotates, friction with the main arm 110 may be reduced.

As such, the dishwasher 1 includes an auxiliary arm connecting member 160 for connecting the main arm 110 and the auxiliary arms 140 and 150 to connect the auxiliary arms 140 and 150 to the main arm. (110) can be rotatably mounted.

In addition, the auxiliary arm connecting member 160 can prevent the auxiliary arms 140 and 150 from sagging, and reduce frictional force generated when the auxiliary arms 140 and 150 rotate. Accordingly, the washing efficiency of the dishwasher 1 may be increased.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: spray arm 110: main arm
140, 150: auxiliary arm 200: fixed gear unit
300: arm holder 400: flow path switching unit
500: rotation gear unit 600: link member

Claims (17)

a sump in which washing water is stored;
a main arm provided in the sump to supply washing water from the sump;
an auxiliary arm rotatably mounted on the main arm and having an auxiliary flow path through which washing water flows; and
and an auxiliary arm connecting member extending from the main arm to rotatably support the auxiliary arm;
The auxiliary arm connecting member,
At least half of the length of the auxiliary arm is inserted into the auxiliary arm to support the auxiliary arm to rotatably rotate the auxiliary arm connecting member about the axis;
The auxiliary arm connecting member,
a flow pipe connected to the main arm and communicating with the auxiliary flow path; and
and a shaft extending from one side of the flow pipe into the auxiliary arm and inserted into the auxiliary flow path.
The method of claim 1,
The auxiliary arm connecting member contacts the auxiliary arm at at least two points spaced apart from each other along an extension direction to support the auxiliary arm.
delete The method of claim 1,
The flow pipe and the shaft contact the inner circumferential surface of the auxiliary flow path to support the auxiliary arm.
5. The method of claim 4,
The auxiliary arm connecting member further includes at least one bearing part protruding from the outer circumferential surface of the flow pipe and contacting the inner circumferential surface of the auxiliary flow path,
The auxiliary arm may further include a separation preventing part protruding downward from the upper surface of the auxiliary flow path and contacting the shaft.
6. The method of claim 5,
The dish washing machine according to claim 1, wherein the separation preventing part surrounds at least a portion of the shaft.
6. The method of claim 5,
The secondary arm is
The dishwasher according to claim 1, further comprising: a support part protruding upward from a bottom surface of the auxiliary flow path to support the shaft.
8. The method of claim 7,
The dish washing machine according to claim 1, wherein the support part surrounds at least a portion of the shaft.
The method of claim 1,
The auxiliary arm connecting member,
and a support rib having one end connected to the flow pipe and the other end connected to the shaft to support the shaft.
10. The method of claim 9,
A plurality of the support ribs are provided along the circumferential direction of the shaft,
Each support rib is spaced apart from each other, and a flow hole through which washing water can flow is formed between adjacent support ribs.
The dishwasher according to claim 10, wherein the washing water supplied from the main arm moves to the auxiliary passage through the flow hole.
The method of claim 1,
The auxiliary arm connecting member,
and a reinforcing rib provided on an outer circumferential surface of the shaft and extending along an extension direction of the shaft to increase strength of the shaft.
The method of claim 1,
The auxiliary arm connecting member,
and a protrusion protruding from the shaft;
The secondary arm is
and a separation preventing part protruding from the inner circumferential surface of the auxiliary flow path and contacting the protrusion to prevent the auxiliary arm from being separated from the shaft.
The dish washing machine according to claim 13, wherein the separation preventing part contacts one side of the protrusion facing the flow pipe.
The dishwasher according to claim 1, wherein the auxiliary arm connecting member is integrally formed with the main arm.
The method of claim 1,
a fixed gear part fixed to the inside of the washing tank to rotatably support the main arm, and a gear tooth formed on an outer circumferential surface;
a rotating gear unit rotatably mounted on the main arm, meshed with the fixed gear unit, and rotated by rotation of the main arm; and
and a link member movably supported by the main arm to transmit the rotational force of the rotary gear unit to the auxiliary arm to rotate the auxiliary arm.
17. The method of claim 16,
and the link member reciprocates by rotation of the rotary gear unit to rotate the auxiliary arm within a predetermined angle range with respect to the auxiliary arm connecting member.

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