KR20210112717A - Auto detergent supplying device for the washing machine - Google Patents

Abstract

Disclosed is an automatic detergent supply device for a washing machine. The automatic detergent supply device comprises: a motor capable of rotating forward and backward; a rotating body coupled to a rotary shaft of the motor; a first driven rotating body which rotates by receiving power from the rotating body; a pair of second driven rotating bodies including first and second locking units extending toward the first driven rotating body, respectively, and provided on both sides in the direction of the rotary shaft of the first driven rotating body so as to selectively rotate along the rotation direction of the first driven rotating body and operate a pair of detergent supply units; and a power supply unit with a ratchet unit provided on the first driven rotating body. When the first driven rotating body moves forward, the ratchet unit is configured to take a locking position that radially extends to be locked by any one of the first and second locking units and take an unlocking position that is folded to be unlocked from the other. When the first driven rotating body moves backward, the ratchet unit takes an unlocking position that is folded to be unlocked from any one of the first and second locking units and a locking position that is unfolded to be locked by the other one.

Description

Automatic detergent supplying device for the washing machine

The present invention relates to an automatic detergent supply device for a washing machine.

A washing machine is a machine for washing clothes using electric power, and includes a water tank storing washing water and a rotating tank rotatably installed inside the water tank. When the laundry rotates in a state in which laundry and detergent water are put into the rotating tub, the laundry put into the rotating tub is stirred together with the washing water to remove dirt on the laundry.

The liquid detergent supply device used in the conventional washing machine is divided into a natural drop method using the intrinsic properties of a liquid, a roller method using a rotational force of a motor, and an air pressure type for supplying external air to the inside of the detergent container.

Korean Patent Laid-Open Publication No. 10-2015-0006260 discloses an automatic detergent supply device using the principle of compression and suction of a cylinder. The disclosed automatic detergent supply apparatus includes a clutch structure in which the power of a motor is transmitted to a driven rotating body through a rack and pinion gear to drive a cylinder, and then moves to one side or the other side according to the forward and reverse rotation of the driven rotating body and engages. However, power transmission by the coupling of the clutch method requires a left-right movement mechanism of the driven rotating body, so the structure is complicated and the durability is poor. In particular, since a space corresponding to the movement range of the driven rotating body is required, the volume in the direction of the rotation axis of the driven rotating body may be increased.

In addition, the disclosed automatic detergent supply device is provided with a detergent suction port and a discharge port in the cylinder, and the spring operating the suction valve and the discharge valve must be arranged to operate in the detergent suction or discharge direction. However, since the cylinder, the detergent inlet and the outlet are located in the same space, it is not easy to design a structure for arranging the spring.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic detergent supply device for a washing machine, which has a simple structure, can reduce manufacturing cost, and can improve durability.

An automatic detergent supply device for a washing machine according to an aspect of the present invention is provided. The automatic detergent supply device for a washing machine includes a pair of detergent supply units, a pair of pumps for respectively sucking and discharging detergent from the pair of detergent supply units, and a power supply unit for operating the pair of pumps. The power supply unit includes a driving unit having a driving wheel capable of forward and reverse rotation, a pair of driven wheels provided on both sides of the driving wheel in a direction of a rotation axis of the driving wheel and rotated by receiving power from the driving unit, and the driving wheel from the pair of driven wheels A pair of electric parts having first and second locking parts respectively extending toward both sides of the driving wheel and receiving power from the pair of driven wheels to operate the respective pumps; A first locking protrusion protruding to the radius of the rotation shaft so as to be caught by one of the first and second locking parts, and the other one of the first and second locking parts according to the reverse rotation of the driving wheel. It includes a ratchet portion having a second locking projection.

The ratchet portion includes a rod extending in the direction of the rotational axis of the driving wheel and connecting the first and second locking projections, the first and second locking projections projecting from both ends of the rod in a radial direction and forming a right angle with each other. can

The ratchet unit may rotate 90 degrees with the rod as an axis.

The detergent supply unit includes a detergent storage chamber extending parallel to each other and having a suction chamber and a discharge chamber communicating with each other, and the pump includes a cylinder arranged in parallel to communicate with the suction chamber to perform suction and compression can do.

The suction chamber and the discharge chamber each have a detergent suction unit and a detergent discharge unit, and the detergent suction unit is provided with a suction valve that is opened when the cylinder is suctioned and blocked when the cylinder is compressed, and the detergent discharge unit is provided when the cylinder is suctioned. There may be provided a discharge valve that is shut off and opened during compression.

The automatic detergent supply apparatus for a washing machine of the present invention has a simple structure, can reduce manufacturing cost, and improve durability.

1 and 2 are a perspective view and an exploded perspective view showing an automatic detergent supply device for a washing machine according to a first embodiment of the present invention.
3 is a perspective view illustrating a power supply unit and a detergent supply unit in a state in which the case is removed in FIG. 1 .
4 is an exploded perspective view of the power supply unit of FIG. 3 .
5A and 5B are perspective views illustrating the operation of the power supply unit of FIG. 3 .
6 is a cross-sectional view of the detergent supply unit of FIG. 3 .
7 is a cross-sectional view of a detergent supply unit according to a second embodiment of the present invention.
8 is a partial cross-sectional view taken along line AA of FIG. 7 .
9 is a cross-sectional view of the detergent supply unit in the suction operation state of FIG. 7 .
FIG. 10 is a partial cross-sectional view taken along line BB of FIG. 8 .

Hereinafter, the automatic detergent supply device 1 for a washing machine will be described in detail with reference to the accompanying drawings. The detergent used in the washing machine includes a washing detergent, a fabric softener, an antistatic agent, and the like, and is hereinafter briefly referred to as a first detergent and a second detergent.

1 and 2 are a perspective view and an exploded perspective view showing an automatic detergent supply device 1 for a washing machine according to an embodiment of the present invention.

1 and 2 , the automatic detergent supply device 1 includes a case 10 , a power supply unit 20 , and a detergent supply unit 30 . The detergent supply unit 30 may include first and second detergent supply units 30-1 and 30-2 for supplying the first and second detergents, respectively. The automatic detergent supply device 1 may further include a control unit (not shown) for controlling the power supply unit 20 .

The case 10 accommodates the power supply unit 20 and the first and second detergent supply units 30-1 and 30-2 in a box shape with an open bottom. The case 10 is sealed by covering the open lower part with the cover 12 while accommodating the power supply unit 20 and the first and second detergent supply units 30-1 and 30-2. The case 10 and the cover 12 are sealed so that the power supply unit 20 and the first and second detergent supply units 30-1 and 30-2 are not exposed to water or moisture due to the nature of the washing machine using water. it is to do

The case 10 includes a first cylinder coupling portion 14-1 for coupling the first detergent cylinder to the upper portion and a second cylinder coupling unit 16-1 for coupling the second detergent cylinder. The case 10 includes a first pipe coupling part 14-2 for connecting the first supply pipe for supplying the discharged first detergent and a second pipe coupling part for connecting the second supply pipe for supplying the discharged second detergent ( 16-2) may be included.

The cover 12 includes first to third columns 18-1, 18-2, and 18-3 erected upward. The first to third columns 18-1, 18-2, and 18-3 may fixedly support the motor 222 of the power supply unit 20 to be described later.

3 is a perspective view illustrating a coupling state of the power supply unit 20 and the first and second detergent supply units 30-1 and 30-2 of FIG. 1 .

Referring to FIG. 3 , the power supply unit 20 may include a driving unit 22 , first and second electric units 24-1 and 24-2, and first and second pumps 26 and 27 . have.

The driving unit 22 may include a motor 222 provided between the first and second detergent supply units 30-1 and 30-2 and a driving wheel 226 that rotates together according to the rotation of the motor 222. .

The first and second transmission units 24 - 1 and 24 - 2 may be provided on both sides of the driving wheel 226 in the direction of the rotation axis.

The first pump 26 is provided between the first detergent supply unit 30-1 and the first electric unit 24-1, and receives power from the first electric unit 24-1, respectively, to receive power from the first detergent supply unit. (30-1) can inhale and compress (discharge) the first detergent so that it is inhaled and discharged.

The second pump 27 is provided between the second detergent supply unit 30-2 and the second electric unit 24-2, and receives power from the second electric unit 24-2, respectively, to receive power from the second detergent supply unit. (30-2) can inhale and compress (discharge) the second detergent so that it is inhaled and discharged.

4 is an exploded perspective view of the power supply unit 20 according to an embodiment of the present invention.

4, the power supply unit 20 includes a driving unit 22, first and second electric units 24-1 and 24-2, a pair of ratchet units 25-1 and 25-2, and a first The first and second pumps 26 and 27 may be included.

The driving unit 22 includes a motor 222 provided between the first and second detergent supply units 30-1 and 30-2, a rotating body 224 coupled to the rotating shaft of the motor 222, and a rotating body 224. It may include a driving wheel 226 that rotates by receiving power from the.

The motor 222 may rotate forward and reverse.

The rotating body 224 may be coupled to the rotating shaft of the motor 222 to extend linearly. The rotating body 224 may include teeth 2242 helically extending along the longitudinal direction.

The driving wheel 226 may include a plurality of teeth 2262 formed in the direction of the rotation shaft 2261 along the outer circumferential surface in a circular shape. The teeth 2242 of the rotating body 224 and the teeth 2262 of the driving wheel 226 may be engaged with each other. Accordingly, as the rotating body 224 rotates by the motor 222 , the driving wheel 226 may also rotate.

Optionally, the rotating body 224 may have a shape similar to that of the driving wheel 226 . At this time, the rotating body 224 and the driving wheel 226 may be connected to each other by engaging the outer peripheral surface with a belt.

The driving wheel 226 may include a ratchet seating portion 2264 extending to both sides along the direction of the rotation shaft 2261 and a through hole 2266 passing in the axial direction.

The twelfth transmission unit 24-1 has an elliptical shape adjacent to the first driven wheel 242-1 and the first driven wheel 242-1 provided on one side of the driving wheel 226 in the rotational axis direction in the rotational axis direction. It may include a first rotation cam 244-1, a first connecting rod coupling part 246-1, and a first locking part 248-1.

The second transmission unit 24-2 has an elliptical shape adjacent to the second driven wheel 242-2 and the second driven wheel 242-2 provided on the other side of the driving wheel 226 in the rotational axis direction in the rotational axis direction. It may include a second rotation cam 244-2, a second connecting rod coupling part 246-2, and a second locking part 248-2.

The first and second driven wheels 242-1 and 242-2 are circularly selected according to the rotational direction of the driving wheel 226 by the ratchet parts 25-1 and 25-2, so that only one of them can be rotated.

The first and second rotation cams 244-1 and 244-2 may be provided adjacent to the first and second driven wheels 242-1 and 242-2, respectively.

The first and second connecting rod coupling portions 246-1 and 246-2 may be eccentrically coupled to the first and second rotation cams 244-1 and 244-2, respectively. Each of the connecting rod coupling portions (246-1, 246-2) may be formed with a plurality of irregularities along the outer peripheral surface. One end of the first and second connecting rods 266 and 276 of the first and second pumps 26 and 27 to be described later may be coupled to the first and second connecting rod coupling portions 246 - 1 and 246 - 2 respectively.

The first and second locking portions 248 - 1 , 248 - 2 extend from the outer peripheral surfaces of the first and second driven wheels 242-1 and 242 - 2 toward both sides of the driving wheel 226 in a bar shape, respectively. The first and second locking parts 248-1,248-2 are respectively the first and second locking projections 254-1 and 255-1 of the first ratchet part 25-1 which pivot between a locking position and a release position, which will be described later. ) or the third and fourth locking projections 254-2 and 255-2 of the second ratchet part 25-2 may be selectively caught or released.

The first ratchet part 25 - 1 may be rotatably mounted to the ratchet seating part 2264 and the through hole 2266 of the driving wheel 226 . The first ratchet part 25-1 includes first and second locking projections 254-1 and 255-1 spaced apart from each other, and a first rod connecting the first and second locking projections 254-1 and 255-1. 256-1). Any one of the first and second locking protrusions 254 - 1 and 255 - 1 may include a first rod coupling part 258 - 1 . The first rod 256-1 may be coupled to the other one of the first and second locking protrusions 254-1 and 255-1.

The first and second locking protrusions 254 - 1 and 255 - 1 may have a cam shape having a flat portion and a curved portion, respectively.

The first ratchet part 25-1 may be assembled by inserting the first rod 256-1 into the through hole 2266 of the driving wheel 226 and then fastening it to the first rod coupling part 258-1. . At this time, the first and second locking projections 254-1 and 255-1 have a semi-cylindrical shape, and planar portions thereof are positioned to be shifted at right angles to each other. In addition, the first ratchet part 25-1 is mounted to be rotatable 90 degrees in a state mounted on the driving wheel 226, so that the first and second locking projections 254-1 and 255-1 are unfolded to the locking positions, respectively. Or it can be folded to the release position where the jamming is released.

The second ratchet part 25 - 2 may be rotatably mounted to the other ratchet seating part 2264 and the through hole 2266 of the driving wheel 226 . The second ratchet portion 25-2 is a second rod connecting the third and fourth locking projections 254-2 and 255-2 spaced apart from each other, and the third and fourth locking projections 254-2 and 255-2. (256-2) may be included. Any one of the third and fourth locking projections 254 - 2 and 255 - 2 may include a second rod coupling portion 258 - 2 . The second rod 256-2 may be coupled to the other one of the third and fourth locking protrusions 254-2 and 255-2.

The third and fourth locking projections 254 - 2 and 255 - 2 may have a cam shape having a flat portion and a curved portion, respectively.

The second ratchet part 25-2 can be assembled by inserting the second rod 256-2 into the other through hole 2266 of the driving wheel 226 and then fastening it to the second rod coupling part 258-2. have. At this time, the third and fourth locking projections 254-2 and 255-2 have a semi-cylindrical shape, and planar portions thereof are positioned to be shifted at right angles to each other. In addition, the second ratchet part 25-2 is mounted to be rotatable 90 degrees in a state mounted on the driving wheel 226, so that the third and fourth locking projections 255-1 and 255-2 are unfolded to the locking positions, respectively. Or it can be folded to the release position where the jamming is released.

The first pump 26 is provided between the first detergent supply unit 30-1 and the first electric unit 24-1, and receives power from the first electric unit 24-1, respectively, to receive power from the first detergent supply unit. (30-1) can inhale and compress (discharge) the first detergent so that it is inhaled and discharged.

The first and second pump 26 may include a first cylinder 262 , a first piston 264 inserted into the first cylinder 262 , and a first connecting rod 266 .

The first cylinder 262 has a cylindrical shape and is arranged parallel to the suction chamber 31-1 of the first detergent supply unit 30-1 and communicates with each other.

The first piston 264 may reciprocate within the first cylinder 262 by the first connecting rod 266 to perform suction and compression operations.

The first connecting rod 266 has one end connected to the first piston 264 and the other end connected to the first rotation cam 244-1, so that the rotational motion of the first driven wheel 242-1 is performed by the first piston. (264) can be converted into a linear reciprocating motion.

The second pump 27 is provided between the second detergent supply unit 30-2 and the second electric unit 24-2, and receives power from the second electric unit 24-2, respectively, to receive power from the second detergent supply unit. (30-2) can inhale and compress (discharge) the second detergent so that it is inhaled and discharged.

The second pump 27 may include a second cylinder 272 , a second piston 274 inserted into the second cylinder 272 , and a second connecting rod 276 .

The second cylinder 272 has a cylindrical shape and is arranged parallel to the suction chamber 31-2 of the second detergent supply unit 30-2 and communicates with each other.

The second piston 274 may perform suction and compression operations by reciprocating within the second cylinder 272 by the second connecting rod 276 .

The second connecting rod 276 has one end connected to the second piston 274 and the other end connected to the second rotation cam 244-2, so that the rotational motion of the second driven wheel 242-2 is performed by the second piston. (274) can be converted to a linear reciprocating motion.

5A and 5B show the first and second driven wheels 242-1 and 242-2 selectively according to the operations of the first and second ratchet parts 25-1 and 25-2 when the motor 222 rotates forward and backward. It is a diagram for explaining the operation of selectively rotating.

Referring to FIG. 5A , when the driving wheel 226 is rotated forward (clockwise), the second and fourth locking projections 255-1 and 255-2 are attached to the pair of first locking parts 248-1, respectively. The locking position unfolds in the radial direction to be caught, and the first and third locking projections 254-1 and 254-2 take a folding release position so that the locking is released from the pair of second locking parts 248-2. .

Referring to FIG. 5B , when the driving wheel 226 rotates in the reverse (counterclockwise) direction, the first and third locking projections 254-1 and 254-2 are attached to the pair of second locking parts 248-2. The second and fourth locking projections 255-1 and 254-2 take a folding release position to release the locking position from the pair of first locking parts 248-1, respectively.

In this way, the first and second driven wheels 242-1 and 242-2 are selectively rotated according to the rotational direction of the driving wheel 226 by the first and second ratchet parts 25-1 and 25-2. . That is, when the driving wheel 226 rotates in the forward direction, the first driven wheel 242-1 is selected to transmit power, and when the driving wheel 226 rotates in the reverse direction, the second driven wheel 242-2 is selected. and transmit power.

When the first driven wheel 242-1 is selected and rotated, the first piston 264 with respect to the first cylinder 262 by the first connecting rod 266 coupled to the first rotation cam 244-1. of suction and compression operations may be performed. Similarly, when the second driven wheel 242-2 is selected and rotated, the second piston ( 274) may be performed.

As a result, the first and second detergent supply units 30 - 1 and 30 - 2 are selectively operated by any one of the first and second pumps 26 and 27 according to the rotation direction of the motor 222 can be inhaled and excreted.

6 is a cross-sectional view illustrating a cross section of the detergent supply units 30-1 and 30-2 of FIG. Hereinafter, since the pair of detergent supply units 30-1 and 30-2 have the same structure, only one detergent supply unit 30-1 will be described.

Referring to FIG. 6 , the detergent supply unit 30-1 includes a detergent storage chamber 31, a suction check valve 33 and It may include a discharge check valve (34). The suction chamber 311, the discharge chamber 312, and the cylinder 262 are all provided adjacent to each other in parallel.

The suction chamber 311 includes a detergent suction unit 3111 for sucking detergent from the detergent container, a cylinder communication unit 37 communicating with the cylinder 262 , and a chamber communication unit 38 communicating with the discharge chamber 312 . do. The detergent suction unit 3111 includes a suction port 3112 connected to the detergent container, a first buffer unit 3114 extended from the suction port 3112, and a first valve hole corresponding to the outer shape of the suction check valve 33 . One valve opening and closing part 3116 may be included. The first buffer unit 3114 may reduce detergent from being caught between the detergent suction unit 3111 and the suction check valve 33 when the suction check valve 33 is operated. The first valve hole may have a tapered shape that gradually expands along the opening direction of the suction check valve 33 .

As a modified embodiment, the first buffer part 3114 may include a plurality of separated long grooves extending along the operating direction of the suction check valve 33 on the inner surface of the first valve opening/closing part 3116 .

The discharge chamber 312 is communicated with the suction chamber 311 by the chamber communication section 38 . The discharge chamber 312 may include a detergent discharge unit 3121 for discharging the detergent to the outside. The detergent discharge unit 3121 is connected to the discharge chamber 312 and corresponds to the discharge port 3122 through which the detergent is discharged, the second buffer unit 3124 extended from the discharge port 3122, and the discharge check valve 34. It may include a second valve opening and closing unit 3126 having a second valve hole. Similarly, the second buffer unit 3124 may reduce detergent from being caught between the detergent discharge unit 3121 and the discharge check valve 34 when the discharge check valve 34 operates. In addition, the second valve hole may have a tapered shape that gradually expands along the direction in which the discharge check valve 36 is opened.

As a modified embodiment, the second buffer part 3124 may include a plurality of separated long grooves extending along the operating direction of the discharge check valve 34 on the inner surface of the second valve opening/closing part 3116 .

The suction check valve 33 may include a suction valve member 331 and a suction valve spring 332 suitable for opening and closing the detergent suction unit 3111 in one direction.

The suction valve member 331 may include a first tapered part 3312 that is sealed and inserted into the first valve hole of the detergent suction part 3111 .

As a modified embodiment, the first tapered part 3312 may include a plurality of separated long grooves extending side by side along the operating direction of the suction check valve 33 on the outer surface to prevent the detergent from being caught.

The suction valve spring 332 may bias the suction valve member 331 in the direction of the tube coupling portion 14-1. Since it can be provided in a separate and independent space, the suction chamber 311, the installation structure is simple and the installation operation is easy.

Therefore, the suction check valve 33 opens the detergent suction part 3111 while compressing the suction valve spring 332 as the inside of the suction chamber 311 becomes (-) pressure during the suction operation of the pump 26, During the compression operation, the inside of the suction chamber 311 becomes (+) pressure to close the detergent suction unit 3111 .

The discharge check valve 34 may include a discharge valve member 341 and a discharge valve spring 342 suitable for opening and closing the detergent discharge unit 3121 in one direction.

The discharge valve member 341 may include a second tapered portion 3412 that is sealed and inserted into the second valve hole of the detergent discharge portion 3121 .

As a modified embodiment, the second tapered portion 3412 may include a plurality of separated long grooves extending side by side along the operating direction of the discharge check valve 34 on the outer surface to prevent the detergent from being caught.

The discharge valve spring 342 may bias the discharge valve member 341 toward the discharge chamber 312 . Here, since the discharge valve spring 342 can be provided in the pipe coupling portion 14-2 that is an independent space, the installation structure is simple and the installation operation is easy.

Accordingly, the discharge check valve 34 closes the detergent discharge unit 3121 when the inside of the discharge chamber 312 becomes (-) pressure during the suction operation of the pump 26, and the discharge chamber 312 during the compression operation. The detergent discharge part 3121 may be opened while the inside is at (+) pressure, and the discharge valve spring 342 is compressed.

The detergent supply unit 30 - 1 may suck the detergent according to the suction operation of the pump 26 and discharge the detergent according to the compression operation.

7 is a cross-sectional view showing a portion of a cross-section of the detergent supply unit 40-1 according to another embodiment of the present invention, and FIG. 8 is a cross-sectional view taken along line A-A of FIG. The same parts as those of the detergent supply unit 30-1 shown in FIG. 6 are given the same reference numerals and a description thereof will be omitted.

Referring to FIG. 7 , the detergent supply unit 40-1 includes a detergent storage chamber 41, a suction check valve 43 and A discharge check valve 44 may be included. The suction chamber 411, the discharge chamber 412, and the cylinder 462 are all provided side by side in parallel.

The suction chamber 411 includes a detergent suction part 4111 for sucking detergent from the detergent container, a cylinder communication part 47 communicating with the cylinder 462 , and a chamber communication part 48 communicating with the discharge chamber 412 . do.

The detergent suction part 4111 corresponds to the external shape of the suction port 4112 communicating between the detergent container and the suction chamber 411 , the first buffer unit 4114 extended from the suction port 4112 , and the suction check valve 43 . A third valve opening/closing portion 4116 forming a third valve hole may be included.

As shown in FIG. 7, the third valve opening/closing part 4116 includes an extension part (TS) in which the inner surface of the third valve hole gradually expands along the direction in which the suction check valve 43 opens, and a vertical extension part (TS) constantly extending vertically ( VS) is included.

The vertical extension portion VS may be provided at a position corresponding to the adjacent cylinder communication portion 47 . The vertical extension VS may be formed to extend, for example, 1/2 or more of the length of the suction chamber 411 in the longitudinal direction of the suction chamber 411 to form a shielding wall. The vertical extension portion VS may extend larger than the width of the adjacent cylinder communication portion 47 as shown in FIG. 8 .

The suction check valve 43 may include a suction valve member 431 and a suction valve spring 432 suitable for opening and closing the detergent suction unit 4111 in one direction.

The discharge check valve 44 may include a discharge valve member 441 and a discharge valve spring 442 suitable for opening and closing the detergent discharge unit 4121 in one direction.

When the first piston 264 advances to the first position P1 to compress the cylinder 462 , the intake check valve 43 may be closed, and the discharge check valve 44 may be opened. At this time, the suction valve member 431 of the suction check valve 43 is in a state in which the third valve hole is completely sealed.

9 is a cross-sectional view of the detergent supply unit in the suction operation state in FIG. 7 , and FIG. 10 is a partial cross-sectional view taken along line B-B of FIG. 8 .

9 and 10, when the first piston 264 retracts to the second position P2 and sucks the cylinder 462, the intake check valve 43 is opened, and the discharge check valve 44 is closed. can

According to the opening of the suction check valve 43, the suction valve member 431 may be opened in the tapered extension TS, and may be continuously blocked in the vertical extension VS. As a result, the detergent sucked through the third valve hole can be prevented from being directly sucked into the cylinder 462 by the vertical extension VS.

In the suction valve member 431 , a step may be formed at a boundary between the extended part TS and the vertical extended part VS. Accordingly, the suction valve member 431 is prevented from rotating when moving forward and backward according to the opening/closing operation, so that the opening/closing operation can be stably performed.

8 and 10 , the volume V1 of the suction chamber 411 may be set to be larger than the volume V2 between the first position P1 and the second position P2 of the cylinder 462 . If the volume V1 is smaller than the volume V, the detergent to be sucked may flow from the suction chamber 411 to the cylinder 462 side.

As another embodiment, the power supply unit 20 detects whether the first and second ratchet parts 25-1 and 25-2 are in contact with the first and second locking parts 248-1,248-2, for example, For example, a touch sensor may be provided. The touch sensor may detect a failure or malfunction of the motor 222 or the driving wheel 226 by detecting whether the first and second ratchet units 25-1 and 25-2 are in contact.

In addition, the automatic detergent supply device 1 may include a wired or wireless communication module communicating with the touch sensor and an alarm unit notifying the user of the failure of the motor 222 or the driving wheel 226 .

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and it is common in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications may be made by those having the knowledge of, of course, and these modified embodiments should not be individually understood from the technical spirit or perspective of the present invention.

1: Automatic detergent supply device
10: case
12: cover
20: power supply unit
22: drive unit
222: motor
224: rotating body
226: drive wheel
24-1,24-2: electric part
242-1,242-2: driven wheel
244-1,244-2: rotation cam
248-1,248-2: first and second locking parts
25-1,25-2: Ratchet part
26,27: pump
30, 30-1, 30-2: detergent supply unit
31: detergent storage chamber
311: suction chamber
312: discharge chamber
33: suction check valve
331: suction valve member
332: intake valve spring
34: discharge check valve
341: discharge valve member
342: discharge valve spring
37: cylinder communication part
38: chamber communication unit

Claims (5)

In the automatic detergent supply device for washing machine,
a pair of detergent supply units;
a pair of pumps for respectively sucking and discharging detergent from the pair of detergent supply units;
It includes a power supply unit for operating the pair of pumps,
The power supply unit,
a driving unit having a driving wheel capable of forward and reverse rotation;
A pair of driven wheels provided on both sides in the direction of the rotation axis of the driving wheel to rotate by receiving power from the driving unit, and first and second locking parts extending from the pair of driven wheels toward both sides of the driving wheel, respectively; a pair of electric parts for operating the respective pumps;
A first locking protrusion protruding to a radius of a rotation shaft so as to be caught on one of the first and second locking parts according to the forward rotation of the driving wheel, and a first and second locking part among the first and second locking parts according to the reverse rotation of the driving wheel An automatic detergent supply device for a washing machine comprising a ratchet portion having a second locking protrusion protruding in a radius of a rotation shaft so as to be caught by the other one. According to claim 1,
The ratchet part,
and a rod extending in the direction of the rotation axis of the driving wheel and connecting the first and second locking projections,
The first and second locking projections protrude from both ends of the rod in a radial direction and at right angles to each other. 3. The method of claim 2,
The ratchet unit is an automatic detergent supply device for a washing machine that rotates 90 degrees about the rod as an axis. According to claim 1,
The detergent supply unit,
and a detergent storage chamber each extending parallel to each other and having a suction chamber and a discharge chamber communicating with each other,
and the pump is arranged in parallel while communicating with the suction chamber to perform suction and compression. 5. The method of claim 4,
The suction chamber and the discharge chamber each have a detergent suction unit and a detergent discharge unit,
The detergent suction part is provided with a suction valve that is opened when the cylinder is sucked and shut off when compressed,
The washing machine automatic detergent supply device is provided with a discharge valve that is blocked when the detergent discharge unit is sucked in and opened when the cylinder is compressed.

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