KR101236001B1 - Washing machine - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine, comprising: a washing machine having a damper for dustproof support of a water tank, the damper comprising a cylinder having a lead wire outlet, a coil accommodated in the cylinder to generate a magnetic field, and a yoke for inducing the magnetic field of the coil. Viscosity changes according to the change of the magnetic field filled in the mold coil unit with the through-hole extended in the axial direction formed by molding, the shaft inserted reciprocally in the through-hole, and the magnetic field filled in the gap between the shaft and the yoke. A magnetic viscous fluid and a lead wire of a coil drawn out of the mold coil unit and drawn out from the lead wire outlet to the outside of the cylinder, and a waterproofing treatment is performed by a moisture proof material at a portion where the lead wire passes through the lead wire outlet of the cylinder from the mold coil unit. To prevent electrical insulation between the coil and cylinder of the damper. It characterized in that it provides operated laundry.

Description

Washing machine {WASHING MACHINE}

The present invention relates to a washing machine.

In a washing machine, for example, a drum type washing machine, a tank having a drum installed therein and a damper (suspension) for dust-proof support of the tank is provided in an outer box, and the damper reduces vibration of the tank due to the rotation of the drum. It is made up.

As the damper, a magnetic viscous fluid (MR fluid) whose viscosity changes in accordance with the change of the magnetic field is considered to improve the anti-vibration performance. In the case of using this magnetic viscous fluid, for example, a coil for generating a magnetic field in a cylinder is provided, and a shaft penetrating the coil in the axial direction is provided to be reciprocated, and a magnetic viscous fluid is provided between the shaft and the coil. It is configured to be charged.

Japanese Laid-Open Patent Publication No. 2010-104578

However, in the above configuration, when water penetrates into the outer box (in the washing machine) or when moisture in the outer box becomes high and condensation occurs, for example, water penetrates into the cylinder from a lead wire outlet which leads the lead wire of the coil. Therefore, there is a fear that the electrical insulation between the coil and the cylinder is lowered.

Therefore, the washing machine which can prevent the fall of the electrical insulation between the coil and cylinder of a damper using magnetic viscous fluid is provided.

The washing machine of the present embodiment is a washing machine having a damper for dust-proof supporting a water tank, wherein the damper includes a cylinder having a lead wire outlet, a coil housed in the cylinder to generate a magnetic field, and a yoke for inducing the magnetic field of the coil. A mold coil unit having a through hole extending in the axial direction formed by molding with a resin, a shaft inserted reciprocally in the through hole, and viscous according to a change in a magnetic field filled in a gap between the shaft and the yoke. The changing magnetic viscous fluid and the lead wire of the coil drawn out of the mold coil unit and drawn out of the cylinder from the lead wire outlet, the lead wire passing through the lead wire outlet of the cylinder from the mold coil unit. The part to which waterproofing was performed by the moisture proof material.

According to this, the fall of the electrical insulation between the coil and cylinder of a damper using a magnetic viscous fluid can be prevented.

1 is a longitudinal cross-sectional view of the suspension of the present embodiment;
2 is an enlarged longitudinal sectional view of a main part;
3 is an external perspective view of the suspension;
4 is an external perspective view of the mold coil unit;
5 is a longitudinal sectional view of a mold coil unit;
6 is a front view of the middle yoke;
7 is a perspective view showing an arrangement relationship between an intermediate yoke and a lead wire of a coil before molding; and
8 is a longitudinal sectional side view showing a schematic configuration of a drum type washing machine.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment applied to the drum type washing machine is described with reference to drawings. First, in FIG. 8 which shows the schematic structure of the drum type washing machine, the laundry entrance 2 is formed in the substantially center part of the front part (right side in FIG. 8) of the outer box 1 which forms the outer shell of the washing machine. The door 3 which opens and closes the laundry entrance 2 is provided.

The operation panel 4 is provided in the upper part of the front part of the outer box 1, and the control device 5 for operation control is provided in the inner side (inside the outer box 1).

The water tank 6 is provided inside the outer box 1. The water tank 6 forms a horizontal cylindrical shape with the axial direction in the front and rear (left and right in FIG. 8), and on the left and right pairs of suspensions (one shown only) on the bottom plate 1a of the outer box 1. It is elastically supported in the state inclined to the front upper part by this. In addition, the detailed structure of the suspension 7 is mentioned later.

The motor 8 is attached to the rear part of the water tank 6. The motor 8 is made of, for example, a brushless motor of direct current, and is of an outer rotor type. The inside of the water tank 6 is connected to a rotating shaft (not shown) mounted at the center of the rotor 8a through a bearing bracket 9. Inserting in is going through.

A drum 10 is provided inside the water tub 6. [ The drum 10 also has an axial cylindrical shape in front and rear, and is inclined upward in front of the water tank 6 and coaxially by connecting the central portion of the rear portion of the drum 10 to the distal end of the rotation shaft of the motor 8. It is supported in a state.

As the drum 10 is directly rotated by the motor 8, the drum 10 is a rotating tub, and the motor 8 functions as a drum driving device for rotating the drum 10.

In the peripheral part (main body part) of the drum 10, many small holes 11 which can pass and vent are formed. On the other hand, the water tank 6 is basically a non-porous shape, and becomes the structure which can be stored. Both of these drums 10 and the water tank 6 are provided with openings 12 and 13 on the front surface, and an annular bellows 14 is formed between the opening 13 of the water tank 6 and the laundry entrance 2. It is installed.

As a result, the laundry entrance 2 is connected to the inside of the drum 10 through the bellows 14, the opening 13 of the water tank 6, and the opening 12 of the drum 10.

The drain pipe 16 is connected to the lowest part of the water storage tank 6 via the drain valve 15 on the way, and the water in the tank 6 can be discharged | emitted to the exterior of the washing machine through the drain pipe 16. FIG. The drying apparatus 17 is provided from the back side of this water tank 6 to upper and front sides.

This drying apparatus 17 is comprised of the dehumidifier 18, the blower 19, the heater 20, and the circulation duct 21, and the moisture in the air discharged | emitted from the inside of the water tank 6 (in the drum 10). Is removed from the dehumidifier 18, and the air is subsequently heated in the heater 20 to generate dry air, and the circulation of returning the dry air to the water tank 6 (in the drum 10) is repeated. The laundry contained in the drum 10 is dried by performing the following.

Subsequently, the structure of the suspension 7 will be described with reference to FIGS. 1 to 7. The suspension 7 is provided with the coil spring 24 which consists of a damper 23 and a compression coil spring, as shown to FIG. 1 and FIG. Among these, the damper 23 is provided with a cylinder 25 having a cylindrical shape extending in the vertical direction, and a shaft 26 extending in the vertical direction along the cylinder 25, the lower portion of the shaft 26 It is inserted in the cylinder 25 so that reciprocation is possible in the up-down direction.

The connection member 28 is provided in the lower end part which is one end of the cylinder 25 in the axial direction. The connecting member 28 is integrally provided with a cover portion 28a and a connecting shaft portion 28b protruding downwardly from the cover portion 28a, among which the cover portion 28a has a lower end of the cylinder 25. The cylinder 25 is fixed to the cylinder 25 by fitting into the opening and welding the outer peripheral portion of the lid portion 28a to the inner peripheral portion of the cylinder 25 (TIG welding).

The connecting shaft portion 28b of the connecting member 28 is fixed to the mounting member 29 (see FIG. 8) fixed to the bottom plate 1a of the outer box 1 through an elastic seat plate 30 of rubber or the like. The cylinder 25 is connected to the mounting member 29 on the side of the bottom plate 1a by fastening with the "

The upper connecting member 32 is connected to the upper end of the shaft 26. The connecting shaft portion 32a of the upper connecting member 32 is connected to the mounting member 33 (see FIG. 8) of the water tank 6 through an elastic seat 34 such as rubber or the like through the connecting shaft portion 28b. The shaft 26 is connected to the mounting member 33 on the side of the water tank 6 by fastening with 35.

A spring support 36 is fitted and fixed to the lower end of the upper connecting member 32, and a coil spring 24 surrounds the shaft 26 between the spring support 36 and the upper end of the cylinder 25. It is attached in a state to do it.

The lower bearing case 38 which forms an annular shape is accommodated in the up-down middle part in the cylinder 25. As shown in FIG. The outer circumferential portion of the lower bearing case 38 is formed with a groove portion 39 extending in the circumferential direction, and the lower bearing case 38 is cocked by caulking a portion corresponding to the groove portion 39 in the circumferential wall portion of the cylinder 25 inward. ) Is fixed in the cylinder 25.

The caulking part is used as the caulking part 40. Moreover, the groove part 39a (refer FIG. 1) opened in the axial direction is formed in one place of the outer peripheral part of the lower bearing case 38. As shown in FIG.

An annular bearing 41 that supports the shaft 26 in a axial direction (up-down direction) to be reciprocated in the inner peripheral portion of the lower bearing case 38 is housed and fixed. The bearing 41 is made of, for example, a sintered metal.

A disengagement fixing member 26a is attached to the lower end of the shaft 26, and the disengagement fixing member 26a contacts the lower surface of the lower bearing case 38 to restrict the movement of the shaft 26 upward. .

The upper bearing case 42 which makes an annular shape is accommodated also in the upper end part which becomes the other end part of the axial direction of the cylinder 25. As shown in FIG. The upper bearing case 42 has a tubular portion 42b having a smaller outer diameter than the lower portion 42a at the upper portion of the upper bearing case 42, and has a stepped portion between the lower portion 42a and the tubular portion 42b. 42c) is formed. The cylinder part 42b protrudes upwards from the cylinder 25. As shown in FIG.

In the outer circumferential portion of the lower portion 42a of the upper bearing case 42, a groove portion 43 is formed over the entire circumference, as shown in FIG. 2, and corresponds to the groove portion 43 of the circumferential wall portion of the cylinder 25. The upper bearing case 42 is being fixed to the upper end part of the cylinder 25 by caulking the part to make inside. The caulking part is used as the caulking part 44.

In this case, the caulking part 44 is provided in the whole periphery by rolling caulking. The groove part 43 is equipped with an O-ring 45, and the O-ring 45 is sandwiched between the groove part 43 of the upper bearing case 42 and the caulking part 44 of the cylinder 25. have.

The lower end of the coil spring 24 is supported by the step portion 42c of the upper bearing case 42. At the upper part of the inner peripheral part of the upper bearing case 42, the annular bearing 46 which supports the shaft 26 so that reciprocation is possible in the axial direction (up-down direction) is accommodated and fixed. Similarly to the lower bearing 41, this bearing 46 is made of, for example, a sintered metal.

In the inner circumferential portion of the upper bearing case 42, an annular friction member 47 is housed in a press-fitted state below the bearing 46, and the inner circumference of the friction member 47 is the shaft 26. Compression contact with the outer peripheral surface of the slide.

In the cylinder 25, the mold coil unit 50 is accommodated in the portion between the lower bearing case 38 and the upper bearing case 42. The mold coil unit 50 is fixed by being fitted by the lower bearing case 38 and the upper bearing case 42.

1, 4, and 5, the mold coil unit 50 includes the lower yoke 51, the first bobbin 53 wound around the first coil 52, and the middle yoke. (54), a second bobbin (56) wound around the second coil (55), an upper yoke (57), and a molding resin (58) for integrating these.

As the resin 58, for example, a thermoplastic resin (nylon, PBT, PET, PP or the like) is used. An annular seal member 59 is attached to the lower yoke 51 and the upper yoke 57 serving as both ends in the axial direction of the mold coil unit 50 in a press-fit state.

These sealing members 59 use the same thing as the friction member 47, and the inner peripheral part is slidably pressed against the outer peripheral surface of the shaft 26. As shown in FIG.

The mold coil unit 50 has a through hole 61 penetrated in the axial direction at the center thereof, and has a cylindrical shape as a whole, and the shaft 26 is inserted into the through hole 61 so as to reciprocate in the axial direction. It is.

On the outer circumferential portion of the mold coil unit 50, a groove portion 62 extending in the axial direction is formed, and a circular concave portion located in the groove portion 62 and located at a portion corresponding to the middle yoke 54. (63) and rectangular recesses (64) connected from the recesses (63) in the circumferential direction are formed. Each yoke 51, 57, 54 acts to induce a magnetic field of the coil.

Among these, two lead wires 65 of the first coil 52 and the second coil 55 are led to the outside from the rectangular recesses 64. As shown in FIG. 5, the proximal end of each lead wire 65 penetrates through the end plates of the corresponding bobbins 53 and 56, and is connected to the end portions of the coils 52 and 55, respectively. 58).

Each lead wire 65 has a periphery of the lead wire covered with a resin tube 65a.

6 and 7, groove portions 68 having lead wire arrangement grooves 66 and conductive wire arrangement grooves 67 are formed in one portion of the outer circumference. It is. The lead wire placement groove 66 and the lead wire placement groove 67 are opened in the axial direction of the middle yoke 54.

In the center portion of the groove portion 68, an injection hole 69 formed of a circular screw hole is formed, and a cylindrical screw 70 having a hexagonal concave portion 70a at a cross section in the injection hole 69 (see Fig. 4). ) Is installed. The injection port 69 is for injecting a magnetic viscous fluid which will be described later.

Moreover, as shown in FIG. 6, the groove part 71 which is narrower than the groove part 68 is formed in the outer peripheral part of the intermediate part yoke 54 in three places. The intermediate | middle part yoke 54 is provided with two or more positioning holes 72 which determine the position of the 1st and 2nd bobbins 53 and 56. As shown in FIG.

The 1st coil 52 and the 2nd coil 55 are connected in series by the conducting wire 73 (refer FIG. 7). One lead wire 65 connected to the first coil 52 and one lead wire 65 connected to the second coil 55 are led out from the mold coil unit 50 as follows.

That is, the lead wire guide member 74 shown in FIG. 7 is used. The lead wire guide member 74 is made of synthetic resin, and has a partition portion 76 formed so as to form a 'c' shape at one end thereof, and to partition two holes 75 and the holes 75 therebetween.

The lead wire placement groove 66 of the middle yoke 54 of the lead wire guide member 74 is inserted into the hole 75 of the lead wire guide member 74 by bending the two lead wires 65, respectively. And the lead wire arrangement groove 66 and the lead arrangement groove 67 are filled with the resin 58 in a state where the conductor wire 73 is disposed in the conductor arrangement groove 67. Resin 58 is also filled in lead wire guide member 74 (see Fig. 5).

The two lead wires 65 are led out of the mold coil unit 50 from the recess 64 as shown in FIG. 4 with the base end covered with the resin 58. The resin 58 is also filled in the other groove portion 71 of the intermediate portion yoke 54. In the outer peripheral portion of the intermediate portion yoke 54, portions other than the groove portions 68 and 71 are exposed from the resin 58.

In the mold coil unit 50, the moisture-proof material 77 which consists of silicon | silicone, for example in the recessed part 64 which is the lead part of the two lead wires 65 (refer FIG. 1, FIG. 2, FIG. 4 and FIG. 5). By potting, the moisture-proof material 77 is filled to the inside of the lead wire guide member 74 to fill the entire recessed portion 64, thereby waterproofing the position of the lead wire 56 while keeping the external force stable. have.

Here, the size of the inner diameter of the through hole 61 of the mold coil unit 50 will be described. As shown in FIG. 5, the inner diameter sizes of the three yokes 51, 54, 57 of the lower, middle and upper portions are set to the same size, and are, for example, 0.4 mm between the outer circumferential surfaces of the shaft 26. It is comprised so that the clearance gap 78 may be formed.

The inner diameter size of the first and second two bobbins 53, 56 is set to the same size, and is set to a size slightly larger than the inner diameter size of the three yokes 51, 54, 57, and the shaft It is comprised so that the gap 79 of about 1.0 mm may be formed between the outer peripheral surfaces of 26, for example.

The gap 78 between the outer circumferential surface of the shaft 26 and the inner circumferential surfaces of the three yokes 51, 54, and 57, and the outer circumferential surface of the shaft 26 and the inner circumferential surfaces of the two bobbins 53 and 56. A magnetic viscous fluid 80 is injected into the gap 79.

In addition, the magnetic viscous fluid 80 is injected to the inside of the upper and lower seal members 59. This magnetic viscous fluid 80 is injected from the inlet 69 of the mold coil unit 50, and the inlet 69 is closed by a screw 70.

The magnetic viscous fluid 80 is obtained by dispersing ferromagnetic particles such as iron and carbonyl iron in an oil, for example. When a magnetic field is applied, the ferromagnetic particles form chain clusters and have an apparent viscosity increase.

In this case, the sealing member 59 of the lower and upper portions of the mold coil unit 50 and the friction member 47 of the upper bearing case 42 act to prevent the magnetic viscous fluid 80 from leaking out, The friction damper using the friction generated between the shafts 26 is exerted.

In addition, as shown in FIG. 5, between the lower yoke 51 and the first bobbin 53, between the first bobbin 53 and the middle yoke 54, and the middle yoke 54 and the second. A seal O-ring 81 is provided between the bobbin 56 and between the second bobbin 56 and the upper yoke 57, respectively. These O-rings 81 also have a function of preventing the magnetic viscous fluid 80 from leaking out.

The lead wire outlet port 82 (refer FIG. 1, FIG. 2) which consists of a circular hole in the position corresponding to the circular recessed part 63 (refer FIG. 4) in the axial direction middle part of the peripheral wall part of the cylinder 25. FIG. ) Is formed.

A bush 83 having a lead wire insertion hole 83a is fitted into the lead wire outlet port 82, and the two lead wires 56 are externally connected through the lead wire insertion hole 83a of the bush 83. Is withdrawn. In this case, the bush 83 is made of resin, for example, nylon.

On the outer circumferential portion of the cylinder 25, a hill-shaped shading portion 84 located above the bush 83 (above the lead wire outlet port 82) is provided. The shade portion 84 is bonded to the outer circumferential surface of the cylinder 25 by an adhesive material. This shading portion 84 prevents water from above penetrating into the cylinder 25 through the lead wire outlet 82 (lead wire insertion hole 83a).

Moreover, the wiring fixing member 85 (refer FIG. 3) is attached to the outer peripheral part of the cylinder 25, and it was led out to the exterior of the cylinder 25 by the wiring holding member 86 provided in the said wiring fixing member 85. As shown in FIG. The lead wire 65 is held.

In addition, a space portion 88 (see FIG. 1) is formed between the lid portion 28a of the connecting member 28 and the lower bearing case 38 in the cylinder 25.

Next, the assembly procedure of the suspension 7 of the said structure is demonstrated. The cover portion 28a of the connecting member 28 is fixed to one end of the cylinder 25 in which both ends in the axial direction are opened by welding.

And, in a different position from the cylinder 25, the lower bearing case 38 which accommodated the bearing 41 in the outer peripheral part of the shaft 26, and the mold coil unit which attached the sealing member 59 to the both ends of an axial direction ( 50, the upper bearing case 42 which accommodates the friction member 47, and the bearing 46 is put together, and the fall fixing member 26a is attached to the front-end | tip of the shaft 26, and these are located. .

At this time, the groove part 39a opened in the axial direction of the outer peripheral part of the lower bearing case 38, and the position of the groove part 62 extended in the axial direction of the outer peripheral part of the mold coil unit 50 are matched. Moreover, the O-ring 45 is attached to the groove part 43 of the outer peripheral part of the upper bearing case 42. As shown in FIG.

Subsequently, the magnetic viscous fluid 80 is injected from the injection port 69. The magnetic viscous fluid 80 is injected into the gaps 78 and 79 between the outer circumferential surface of the shaft 26 and the inner circumferential surface of the mold coil unit 50, and is also injected into the upper and lower seal members 59. After the injection of the magnetic viscous fluid 80, the injection hole 69 is fitted with a screw 70 to close the injection hole 69.

Subsequently, the leading end of the lead wire 65 drawn from the mold coil unit 50 is inserted from the upper end opening of the cylinder 25, and the leading end of the lead wire 65 is connected to the cylinder 25 using a locking member or the like not shown. ) Is taken out of the cylinder 25 from the lead wire outlet port 82. At this time, the bush 83 is not attached to the lead wire lead-out port 82.

Subsequently, the lead wire 65 is disposed in the groove 39a of the lower bearing case 38 and the groove 62 of the mold coil unit 50 so that the lead wire 65 is connected to the lower bearing case 38 and the mold coil unit ( The lower bearing case 38, the mold coil unit 50, and the upper bearing case 42 assembled to the shaft 26 are connected to the shaft 26 without being protruded from the outer circumferential surface of the 50. Together, they are inserted into the cylinder 25 from the top opening of the cylinder 25. The lead wire 65 is gradually taken out to the outside as the cylinder 25 is inserted into the cylinder 25.

Subsequently, in the state which positioned the upper bearing case 42 with respect to the cylinder 25, the site | part which exists in the outer peripheral part of the upper end side of the cylinder 25, and corresponds to the groove part 43 of the upper bearing case 42. The caulking portion 44 is provided by rolling caulking to fix the upper bearing case 42 to the upper portion of the cylinder 25.

In the outer peripheral part of the intermediate part of the axial direction of the cylinder 25, the caulking part 40 is provided by cocking the part corresponding to the groove part 39 of the outer peripheral part of the lower bearing case 38, and the lower bearing case 38 is provided. It is fixed to the intermediate part in the cylinder 35.

Subsequently, in a state where the cylinder 25 and the shaft 26 are in the horizontal direction (almost horizontal state), the lead wire (using a mechanism such as a needle) (not shown) is used from the lead wire outlet port 82 of the cylinder 25. The moisture-proof moisture-proof material 77 which flows a little is injected into the rectangular recessed part 64 which is the lead-out part of 65, and the moisture-proof material 77 is made to cover the lead-out part of the lead wire 65 (FIG. 4). Reference).

As the moisture proof material 77, silicon is used, for example. At this time, it is preferable that the rectangular concave portion 64 is lowered so that the moisture proof material 77 does not flow out of the concave portion 64, for example, the circular concave portion 63 or the groove portion 62. Do. By leaving it in this state and hardening the moisture proof material 77, it is set as a waterproofing process.

Subsequently, two lead wires 65 drawn out of the cylinder 25 are inserted into the lead wire insertion hole 83a of the bush 83, and the bush 83 is inserted into the outer circumference of the two lead wires 65. The cylinder 83 is moved to the cylinder 25 side, and the bush 83 is fitted to the lead wire outlet 82 of the cylinder 25 (see FIGS. 1 to 3).

And the coil spring 24 is arrange | positioned so that the upper part of the shaft 26 may be surrounded by the upper end of the cylinder 25, and the spring receiving part 36 and the upper connection member 22 may be inserted in the upper end of the shaft 26. Fix it.

As a result, the coil spring 24 is compressed between the upper bearing case 42 of the upper end of the cylinder 25 and the spring support 36. Moreover, the wiring fixing member 85 is attached to the outer peripheral part of the cylinder 25 (refer FIG. 3), and the lead wire 65 is hold | maintained by the wiring holding member 86. FIG. Thereby, the assembly of the suspension 7 is completed.

The suspension 7 assembled in this way is installed on both left and right sides of the water tank 6. In addition, the lead wire 65 derived from each suspension 7 is connected to a drive circuit (not shown). The first and second coils 52 and 55 are integrally controlled by the control device 5 via the drive circuit.

In the above configuration, the operation of the above-described suspension 7 related to the washing operation will be described. First, a state in which the first and second coils 52 and 55 are not energized is considered.

When the drum 10 is rotationally driven in the washing step, the dehydration step and the drying step, the water tank 6 vibrates mainly in the up and down direction. In response to the vertical vibration of the water tank 6, in the suspension 7, the shaft 26 connected to the water tank 6 side with respect to the cylinder 25 fixed to the bottom plate 1a side of the outer box 1 is coil spring. It moves up and down while stretching (24).

At this time, not only the vibration reduction effect by this coil spring 24 but also the friction member 47 and the seal member 59 always act the damping force as a frictional resistance with respect to the shaft 26, and also the shaft 26 and 3 The magnetic viscous fluid 80 filled between the two yokes 51, 54, 57 and the two bobbins 53, 56 exerts a damping force with frictional resistance due to the viscosity to attenuate the amplitude of the water tank 6.

Here, when the vibration of the water tank 6 becomes larger, for example, when the rotation speed of the drum 10 is the resonance rotation speed (about 100 to 300 rpm), the first and second coils 52 and 55 are energized. It is.

In addition, this energization condition is not limited to the said rotational speed, The vibration of the water tank 6 may be detected by a vibration detection means, and you may make it energize when a vibration becomes larger than a set value.

When the energization condition is satisfied and the first and second coils 52 and 55 are energized, a magnetic field is applied to the magnetic viscous fluid 80 through the yokes 51, 54 and 57, and the magnetic viscous fluid ( The viscosity of 80) increases, thereby increasing the frictional resistance.

In this way, the damping force is increased by increasing the frictional resistance to the shaft 26 more than in the case described above (in the case of non-conduction of the first and second coils 52 and 55). Therefore, the vibration of the water tank 6 can be attenuated effectively.

In addition, the first and second coils 52 and 55 generate a magnetic field corresponding to the current value flowing in the coil to control the viscosity of the magnetic viscous fluid 80, and the generated magnetic field is varied by the current value. The viscosity of the magnetic viscous fluid 80 can be controlled variably.

On the other hand, the thing of the said structure WHEREIN: Consider the case where water penetrates into the outer box 1, or dew condensation generate | occur | produced in the outer box 1. In the suspension 7, since the connecting member 28 is fitted and welded to the lower end opening of the cylinder 25, water enters the cylinder 25 from the lower end of the cylinder 25. Can be prevented.

In addition, the upper bearing case 42 is fitted in the upper opening of the cylinder 25, and the caulking part 44 is installed over the entire circumference, and between the cylinder 25 and the upper bearing case 42 is O. Since the ring 45 is provided, water can be prevented from entering the cylinder 25 from the upper end of the cylinder 25.

Since the bush 83 is fitted to the lead wire outlet 82 of the circumferential wall of the cylinder 25, water enters the cylinder 25 from the outside of the cylinder 25 through the lead wire outlet 82. You can prevent as much as you can. In addition, since the shade portion 84 is provided on the outer circumferential portion of the cylinder 25 above the bush 83, water flowing along the outer circumferential surface of the cylinder 25 flows through the lead wire outlet 82 to the cylinder 25. Invasion inside can be prevented as much as possible.

Here, even when the bush 83 is attached to the lead wire outlet 82, the outside of the cylinder 25 through a gap between the bush 83 and the lead wire outlet 82, or through the lead wire insertion hole and the hole 83a of the bush 83. It is conceivable that water infiltrates into the cylinder 25.

When water intrudes in the cylinder 25 in this way, the water is wound up to the coils 52 and 55 wound around the bobbins 53 and 56 through a small gap between the outer circumferential surface of the lead wire 65 and the resin 58. There exists a possibility that it may invade, and the connection part of the edge part of the coils 52 and 55 and the base end part of the lead wire 65 and especially the intermediate part yoke 54 may be electrically connected through water.

The intermediate yoke 54 is in contact with the cylinder 25 and electrically connected to most of the metal parts constituting the damper 23. For this reason, when water enters the lead wire 65 and the ends of the coils 52 and 55 through the lead wire 65, the surface of the lead wire 65 and the damper 23 (cylinder 25) is electrically connected. It will be in a state, and there exists a possibility that the electrical insulation between the coils 52 and 55 and the cylinder 25 may fall remarkably.

In this regard, in the above embodiment, the concave portion 64 serving as a lead portion of the lead wires 65 of the coils 52 and 55 of the mold coil unit 50 is subjected to a waterproof treatment by the moisture proof material 77. Even if water penetrates into the cylinder 25 through the bush 83, the water can be prevented from intruding to the connecting portion of the proximal end of the lead wire 65 and the ends of the coils 52, 55, and the coils 52, 55 ) And the electrical insulation between the cylinder 25 can be prevented from being lowered, and an electric shock or the like can be prevented in advance.

According to the said embodiment, the following effect is acquired.

Of the portions where the lead wires 65 of the coils 52 and 55 pass through the lead wire outlet port 82 of the cylinder 25 from the mold coil unit 50, the lead wires 65 are located in the mold coil unit 50 and lead portions of the lead wires 65. Waterproofing process by the moisture proof material 77 was performed to the recessed part 64 used as this.

By this structure, even if water penetrates into the cylinder 25 through the bush 83, the water can be prevented from invading to the connection part of the base end part of the lead wire 65, and the edge part of the coils 52 and 55, The electrical insulation between the coils 52 and 55 and the cylinder 25 can be prevented from decreasing.

In this case, if the waterproofing process by the moisture proof material 77 is a part from which the lead wire 65 passes through the lead wire lead-out port 82 of the cylinder 25 from the mold coil unit 50, for example, the lead wire lead-out port 82 It may be performed on (part 83).

As in this embodiment, the waterproofing treatment by the moisture proof material 77 is performed on the lead portion 65 of the lead coil 65 in the mold coil unit 50 so that the moisture proof material 77 is not exposed to the outside of the cylinder 25, In addition, the load due to vibration is difficult to concentrate in the vicinity of the moisture barrier material 77, which is advantageous against vibration.

Since the moisture proof material 77 is provided in the recessed part 64 provided in the circumference | surroundings of the lead wire 65 in the mold coil unit 50 by injection | pouring, the moisture proof material 77 does not protrude and does not interfere.

The bush 83 is fitted to the lead wire outlet port 82 of the cylinder 25, and the lead wire 65 is configured to be led out to the outside through the lead wire insertion hole 83a of the bush 83.

According to this configuration, the bush 83 is provided in the lead wire outlet 82 so that water is less likely to enter the cylinder 25 from the lead wire outlet 82 than when the bush is not provided. In addition, the bush 83 is made of resin, so that the rigidity is high, the mounting strength can be increased, the moldability is good, and there is an advantage that it can be manufactured at a low price.

Since the shade portion 84 is provided on the outer circumferential portion of the cylinder 25 so as to be positioned above the bush 83, water along the outer circumferential surface of the cylinder 25 enters the cylinder 25 through the lead wire outlet 82. Can be prevented as much as possible.

The connection member 28 is provided in the lower end part which is one end of the axial direction of the cylinder 25, and since the cover part 28a of the cylinder 25 and the connection member 28 was fixed by welding, the water was carried out in the cylinder 25 The intrusion into the cylinder 25 from the lower part of can be reliably prevented.

The bearing 46 which supports the shaft 26 reciprocally is arrange | positioned at the upper end used as the other end part of the axial direction of the cylinder 25, and the upper bearing case 42 which supports the bearing 46 is fitted, It arrange | positioned and fixed the cylinder 25 and the upper bearing case 42 by rolling caulking.

As a result, the caulking portion 44 can be provided at the outer circumference of the upper end of the cylinder 25 over its entire circumference, so that water can enter the cylinder 25 from the junction of the upper end of the cylinder 25 and the upper bearing case 42. It can prevent.

In addition, since the O-ring 45 is provided between the cylinder 25 and the outer circumferential portion of the upper bearing case 42, intrusion of water into the cylinder 25 from the upper portion of the cylinder 25 can be further prevented.

(Other embodiment)

The bush 83 fitted to the lead wire outlet 82 of the cylinder 25 can be made of rubber instead of resin. When the bush 83 is made of rubber, concentration of the load applied to the lead wire 56 at the time of vibration can be prevented as much as possible, which is advantageous against vibration. In addition, there is also an advantage that the adhesion to the lead wire lead-out port 82 can be improved.

In the mold coil unit 50, only one coil may be three or more, and two or more yokes may be sufficient.

The embodiment of the washing machine is not limited to a drum type washing machine, but may be a so-called vertical washing machine provided with a rotating tank inside the vertical water tank and provided with a stirring body in the rotating water tank.

As described above, according to the present embodiment, it is possible to prevent the electrical insulation between the coil and the cylinder from deteriorating by performing a waterproofing treatment with a moisture proof material at a portion where the lead wire of the coil passes through the lead wire outlet of the cylinder from the mold coil unit. .

While various embodiments of the invention have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the inventions. These new embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and its modifications are included in the scope and spirit of the invention, and are also included in the invention and equivalent scope of the claims.

1: outer box 6: tank
7: suspension 8: motor
10: drum (rotary bath) 23: damper
24: coil spring 25: cylinder
26 shaft 28 connection member
32: upper connecting member 38: lower bearing case
41: bearing
42: upper bearing case (bearing case)
43: groove 44: caulking portion
45: O-ring 46: bearing
47: friction member 50: mold coil unit
51: lower yoke 52: first coil
53: first bobbin 54: middle yoke
55: second coil 56: second bobbin
57: upper yoke 58: resin
59: sealing member 61: through hole
64: recessed part 65: lead wire
77: moisture proof material 80: magnetic viscous fluid
82: lead wire outlet 83: bush
83a: lead wire insertion hole 84: shading part

Claims (9)

In the washing machine provided with a damper which dust-proof support a water tank,
The damper is,
Cylinder with lead wire outlet,
A molded coil unit having a through hole extending in an axial direction formed by molding a coil housed in the cylinder to generate a magnetic field and a yoke for inducing the magnetic field of the coil by resin;
A shaft inserted into the through hole so as to be reciprocated,
A magnetic viscous fluid whose viscosity changes in accordance with a change in a magnetic field filled in the gap between the shaft and the yoke, and
A lead wire of the coil drawn out of the mold coil unit and drawn out of the cylinder from the lead wire outlet;
The washing machine characterized by waterproofing by a moisture proof material to the part which the said lead wire passes through the said lead wire outlet of the said cylinder from the said mold coil unit. The method of claim 1,
The moisture proof material is provided in the lead portion of the lead wire of the mold coil unit. The method of claim 2,
The said molded coil unit is provided with the recessed part around the lead-out part of the said lead wire, The said moisture proof material is inject | poured into the said recessed part, The washing machine characterized by the above-mentioned. The method of claim 1,
And a connecting member at one end in the axial direction of the cylinder, wherein the cylinder and the connecting member are fixed by welding. The method of claim 4, wherein
A bearing for supporting the shaft in a reciprocating manner is disposed at the other end in the axial direction of the cylinder, and a bearing case for supporting the bearing is fitted to be arranged, and the cylinder and the bearing case are fixed by rolling caulking. Washing machine characterized in that. The method of claim 5, wherein
The outer peripheral part of the said bearing case WHEREIN: The groove part located in the part which fits with the said cylinder is provided, The washing machine characterized by the O-ring attached to the said groove part. The method of claim 1,
A resin bush having a lead wire insertion hole is fitted into the lead wire outlet of the cylinder, and the lead wire is drawn out through the lead wire insertion hole. The method of claim 1,
A rubber bush having a lead wire insertion hole is fitted into the lead wire outlet port of the cylinder, and the lead wire is drawn out through the lead wire insertion hole. 9. The method according to claim 7 or 8,
The outer peripheral part of the said cylinder WHEREIN: The shading part located above the said lead wire lead-out part is provided, The washing machine characterized by the above-mentioned.

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