KR100289433B1 - Apparatus for fixing sensor water level/vibration of washing machine - Google Patents

Abstract

The present disclosure relates to a water level / vibration sensor fixing device for a washing machine that supports the water level / vibration sensor more stably to optimize washing operation control and to balance the accuracy of the level and vibration amount detection.

The water level / vibration sensor of the disclosed washing machine includes: a substantially circular ball fixing support member having a predetermined diameter and length on a bottom surface of a magnetic field medium and formed vertically downward, and having a first hook protruding outward at an approximately center of an outer circumferential surface thereof; An interference fit portion having a predetermined length on the upper surface of the shielding member and being vertically upward and having a predetermined length larger than the diameter of the ball fixing support member at the center thereof, and a second hook protrudes inwardly in the center of the inner circumferential surface thereof. A substantially circular pusher formed; The ball fixing support member of the magnetic medium is configured to be hooked to the interference fitting portion of the pusher.

Accordingly, the ball fixing support member is formed on the magnetic medium and the pusher is integrally formed on the shielding member so that the ball fixing support member and the pusher are combined or hooked together so that the magnetic medium is stably fixed and the assembly process time of the water level / vibration sensor. This has the advantage of being shortened.

Description

Apparatus for fixing sensor water level / vibration of washing machine}

The present invention relates to a water level / vibration sensor that satisfies the vibration and level of the washing tank at the same time in a washing machine. The present invention relates to a water level / vibration sensor fixing device of a washing machine that supports the water level / vibration sensor that detects the change value more stably to optimize washing operation control and to balance the accuracy of the level and vibration level detection.

For example, a washing machine generally detects a quantity of clothes or the like put into a washing tank, and when a quantity is determined, sets a water flow, a detergent, and an overall washing time according to the quantity.

In addition, the washing operation is performed to separate the time when the water is stuck to the laundry by friction with the laundry by vortexing the water through the reverse rotation of the pulsator with the overall washing time.

After the washing administration is completed, the turbid water in the washing tank is discharged and the washing tank is supplied with fresh water to rinse for a predetermined number of times.

When the rinsing is completed, the water in the washing tank is discharged and the induction motor is rotated at a high speed at a predetermined speed to remove the laundry water by centrifugal separation to control the washing operation in a dehydrating administrative procedure for dehydration.

In the washing operation control of the washing machine, in particular, in order to maintain the optimum water level at the beginning of the washing cycle, the water supply valve is opened according to the amount of water in the washing tank, and water is supplied until the set water level is reached. As a method of, the method of detecting the water level with the LC resonant frequency that is changed according to the pressure of the water supplied to the washing tank is mainly used.

For example, when the pressure of the water supplied to the washing tank is changed, the LC resonant frequency is changed accordingly. After measuring the changed resonance frequency to determine the water level corresponding to the above capacity, the water supply valve is closed to stop the water supply. Optimum water level is maintained.

In the dehydration stroke, the rotation of the dehydration tank, that is, the washing tank, is usually set to reach a high speed operation of about 1700 revolutions / minute immediately after the rotation rises, so that a large centrifugal force acts on the laundry in the washing tank so that the washing tank is washed. They are driven to one side in the interior, and as a result, large vibrations or noises are often generated. And this vibration can not be absorbed by the balance device, such as snubber bar installed in the upper opening of the washing tank.

It is also conceivable to simply control the length of the induction motor to control the length of the washing tank to interrupt the rotation of the washing tank. However, since the rotational force due to inertia varies depending on the amount of laundry, the result is that when the induction motor is stopped, The rotational speed decreased, but the rotational speed gradually increased by the subsequent operation, and the rotational speed control to solve the defect could not be performed.

However, in recent years, a method of detecting and healing vibrations of a washing tank generated by the washing of a laundry during dehydration has been devised.

The vibration detection method of such a washing machine uses a mechanical safety switch.

That is, a vibration sensor such as the mechanical safety switch is mounted on the upper part of the washing machine, and detects vibration by short-circuit or opening depending on the rotation radius of the washing tank (dehydration tank) during the dehydration stroke, and whether the dehydration stroke is progressed according to the degree of vibration. To determine.

As an example of such a general sensor, a water level sensor and a vibration sensor are shown in FIGS.

1 shows one such water level sensor mounted in a general washing machine.

In the water level sensor (10), one side of the housing is connected to the tank 20 of the washing machine through the hydraulic pressure transmission passage (19) and the other side of the housing 11 having a substantially cylindrical shape, and installed in the housing And a bellows 12 which is connected to the hydraulic passage 19 and installed inside the tank 20 and is accommodated in a coaxial relationship with the tank to expand and contract according to the pressure of water in a conical perforated washing tank for dehydration and washing. And a shielding member 13 having a hook shape sealed at the upper end of the bellows to shield the hydraulic pressure, and installed on the central inner wall of the housing 11 with an inductance value inherent to the predetermined direction in a direction perpendicular to the shielding member 13. The unique inductance value is coupled to the coil 15 having a cylindrical shape spaced apart from each other, and the upper surface of the shielding member 13 while vertically moving the inner space of the coil 15 along the expansion and contraction of the bellows 12. Changing circle A core 14 having a cylindrical shape, a cylindrical supporting member 17 coupled to the upper end of the coil 15 to support the coil, a cap 18 closing the upper opening of the supporting member, It is composed of a spring 16 which is interposed on the upper surface of the core 14 and the bottom surface of the cap 18 to restore the core 14 to its original position.

Figure 3 shows one of the vibration sensor, such as a safety switch or a limit switch (Limit Switch) mounted to the washing machine together with the water level sensor of FIG.

In the vibration sensor 21, the voltage control member (24, 25) is installed on the upper surface of the case of the washing machine and electrically shorted or opened, and the voltage control member (24) at a certain distance from the tank 20 A switch leg 22 installed and contacted and contacted by the vibration width of the tank 20 according to the rotation radius of the washing tub to electrically short or open the two voltage control members 24 and 25; It is composed of a spring 23 for restoring the original position to open the two voltage control members (24, 25).

The washing machine to which the water level sensor and the vibration sensor according to the related art made in this way are respectively applied will be further described with reference to FIGS. 1 to 3.

First, after setting the washing stroke through the operation panel not shown in the drawing, when the operation is started, the washing stroke, the rinsing stroke, and the dehydrating stroke are performed in a predetermined procedure by controlling the water supply valve, the drain valve, and the induction motor.

At this time, the washing stroke, the rinsing stroke and the dehydration stroke are performed according to the operation state of the water level sensor 10 for detecting the washing water level and the vibration sensor 21 for detecting the bias of the washing tank.

Here, the state in which the core 14 of the water level sensor 10 does not enter the internal space of the coil 15 is determined to be a state in which there is no water in the washing tank, and the core 14 vertically sets the internal space of the coil 15. When exercising, it has a condition that it determines that there is water in a washing tank according to the exercise quantity. In addition, when there is no electric signal output from the voltage control members 24 and 25 of the vibration sensor 21, it is determined that there is no vibration and vibration is generated when an electric signal is output from the voltage control members 24 and 25. Has a condition of determining that there is.

Under such conditions, the water is supplied to the washing tank by opening a water supply valve such as an electronic control valve in accordance with the quantity of the washing tank installed inside the tank 20 and accommodated coaxially with the tank during the initial washing operation.

When water is supplied to the washing tank, the water pressure according to the water level is transmitted to the bellows 12 in the housing 11 through the water pressure passage 19 connected to the tank 20. At this time, the water pressure does not proceed any more by the shielding member 13 sealed on the upper portion of the bellows 12, and the bellows 12 extends in proportion to the water pressure.

When the bellows 12 is extended, at the same time, the cylindrical core 14 coupled to the shielding member 13 moves upward in the vertical direction through the inner space of the coil 15 having a larger diameter and inherent inductance. (Step ST10), the inherent inductance of the coil 15 is changed according to the amount of upward movement of the core 14 (step ST20). For example, as the core 14 moves upward through the inner space of the coil 15, the inductance value of the coil 15 increases.

The inductance change value of the coil 15 is multiplied by two capacitance values of the LC resonant circuit not shown in the figure to generate a predetermined resonance frequency.

In other words, by connecting both terminals of the coil 15 between two capacitances, the coil 15 and the two capacitances operate as one LC resonant circuit to generate a resonance frequency (ST30).

Usually, the resonance frequency f of the LC resonant circuit is calculated by the following equation.

Becomes

The water level in the washing tank is measured with the amount of change in the resonance frequency generated as described above.

Then, it is determined whether the measured water level is an optimum water level suitable for the detected amount of water. If the water level is the optimal water level, the water supply valve is closed to stop the water supply, and the induction motor is alternately energized to perform the washing operation.

After the washing administration is completed, the turbid water in the washing tank is discharged and the discharge completion is sensed through the above-described water level sensor (10).

That is, during drainage, as the water level in the washing tank is lowered, the water pressure is also lowered, and when the water pressure is gradually lowered, the bellows 12 is stretched and contracted by the elastic force of the spring 16 interposed between the cap 18 and the core 14. In addition, the core 14 is gradually vertically lowered through the inner space of the coil 15 to return to the initial position.

When the core 14 returns to the initial position, the inductance of the coil 15 also decreases, and the resonance frequency is changed by the reduced inductance and the two capacitance values of the LC resonant circuit, thereby determining the completion point of the drainage. do.

After the washing administration is completed, the rinsing stroke is completed by supplying and draining water to the washing tank in the same manner as described above.

After washing and rinsing as described above, the induction motor is rotated at a predetermined speed for dehydration and the vibration of the washing tank according to the rotation of the induction motor is measured through the vibration sensor 21 as shown in FIG. 3.

At this time, the balance or vibration of the tank 20 is generated in accordance with the degree of bias of the laundry in the washing tank during the dehydration stroke.

When the laundry is evenly disposed on the wall of the washing tank, the washing tank also rotates with the same rotation radius about the concentric axis, thereby achieving a balanced state in which the vibration of the tank 20 is not generated. Dehydration proceeds.

However, when the laundry is biased on one wall of the washing tank, the washing tank rotates eccentrically and the washing tank strikes the tank 20 when the degree of eccentric rotation increases.

When the vibration width increases with the hitting degree of the tank 20, and hits the switch leg 22 of the vibration sensor 21 such as a safety switch every one revolution, the switch leg 22 As shown in FIG. 3, the two voltage control members 24 and 25 are electrically shorted or opened while rotating counterclockwise or clockwise by the spring 23.

As such, when an electrical signal is generated from any one of the voltage regulating members 24 and 25, water is supplied into the washing tank through the water supply valve, and the inflation stroke is performed for a predetermined time. Evenly placed on the wall of the vibration will reduce the vibration.

When the vibration is reduced, the induction motor is rotated at high speed to dehydrate the laundry.

In addition, if an electrical signal is continuously generated from the voltage regulating member even after the inflating stroke, the induction motor is stopped to prevent the risk of excessive vibration.

The water level / vibration sensor of the general washing machine detects the water level in the washing tank using the LC resonant circuit during the washing stroke, and detects the vibration of the washing tank and the tank through the mechanical vibration sensor such as a separate safety switch in the dehydrating stroke. It can be seen that.

However, according to the water level / vibration sensor of the general washing machine described above, the two sensors must be installed separately, thereby requiring a cost and a manufacturing process.

In addition, since vibration sensors such as safety switches use mechanical contacts and springs, failure factors such as aging change of the contacts and corrosion of the contacts are generated. In particular, springs due to deterioration and necessity of contact gap adjustment according to mechanical contacts are generated. Due to its reduced resilience and complexity, accurate vibration detection is not possible.

For example, if the safety switch is installed close to the tank, it also detects a slight vibration of the tank to perform unnecessary operations. If the safety switch is installed farther than normal, the initial position of the safety switch is important because the vibration is detected only after the vibration is very large. In order to install it correctly, there is an additional cost and productivity problem.

Therefore, it is possible to prevent the failure of the contact point due to the safety switch and the restoring force of the spring and the increase of the error rate of vibration detection caused by the safety switch, and also the difficulty and mechanical complexity of the installation caused by separately installing the safety switch and the water level sensor. A single water level / vibration sensor that avoids and achieves the same effect as the conventional one is well shown in Patent Application No. 98-33272 (name: Vibration Sensing Device for Washing Machine) which I elected on August 17, 1998. .

According to the patent application No. 98-33272 coupled to the magnetic field medium formed to be inclined at a predetermined angle on the hook-shaped shield member 13, the rolling body for moving the inclined surface in accordance with the vibration of the washing tank on the inclined surface of the magnetic medium It is a raised structure.

FIG. 4 shows one of the water level / vibration sensors of such a washing machine described in patent application No. 98-33272, which is filed by the applicant, and in the drawings used for description, the same components as in FIG. Some may be provided with a number and a duplicate description thereof may be omitted.

In the water level / vibration sensor (30), a so-called cylindrical housing (11) connected to the tank (20) and the hydraulic channel (19), and installed in the housing and connected to the hydraulic channel (19) And a bellows 12 extending and contracting by water pressure according to the water level in the washing tank, a shielding member 13 having a hook shape sealed at the upper end of the bellows 12 and shielding the transmission of water pressure, and a housing having a unique inductance. The inductance of the coil 15 and the upper surface of the shielding member 13 is hooked to the central inner wall of the 11 to change the inductance while vertically moving the inner space of the coil 15 according to the expansion and contraction of the bellows 12. A cylindrical core 14, a cylindrical support member 17 coupled to the upper end of the coil 15 to support the coil 15, and a cap closing the upper opening of the support member 17 ( 18) and open in a direction perpendicular to the top surface of the core 14 and the bottom surface of the cap 18. And a spring 16 having a coil shape for returning the core 14 to its original position, and an inclined surface 33 having a predetermined angle in one direction, the shielding member 13 having a predetermined distance from the upper end of the core 14. The magnetic medium 31 is coupled to the hook upper surface 34 of the and the left and right, vertically moving along the inclined surface 33 of the magnetic medium 31 in accordance with the eccentric rotation of the washing tank to change the inductance of the coil 15 LC, which generates a resonance frequency by adding a fixed capacitance to the inductance of the coil 15 due to the vertical movement of the core 14 and the vertical movement of the core 14 and the left and right and vertical movement of the rolling body 32 of the magnetic material. It consists of a resonance circuit.

Thus, the water level / vibration sensor 30 of the unified washing machine aims to accurately detect the washing water level and the vibration amount due to the bias of the laundry without the error rate of sensing during washing operation control, especially during washing operation and dehydration operation. .

Here, the measurement of the water level during the washing stroke and the rinsing stroke is measured by the method as shown in FIG. 1, so the operation thereof is omitted and only the vibration measuring process during the dehydrating stroke will be described below.

That is, when the laundry is evenly disposed on the wall of the washing tank during the dehydration stroke, the washing tank rotates with the same rotation radius about the concentric axis, thereby achieving a balanced state in which the vibration of the tank 20 is not generated.

When the tank 20 is in a balanced state that does not vibrate, the rolling material 32 of the magnetic material is positioned at the right end with respect to FIG. 4 without moving left and right along the inclined surface 33 of the magnetic medium 31. .

When the rolling body 32 is positioned at the right end of the inclined surface 33 of the magnetic medium 31, the inductance of the coil 15 does not change.

Balanced by the equal arrangement of the laundry, if the rolling body 32 is continuously positioned on the right end of the magnetic medium 31, the same resonant frequency is continuously generated in the LC resonant circuit, thereby induction motor for a predetermined dehydration time Accelerates rotation to proceed with dehydration.

However, when the laundry is biased on one wall of the washing tank, the washing tank rotates eccentrically, and the tank 20 vibrates or tilts toward the laundry in accordance with the degree of eccentric rotation.

When the tank 20 vibrates, the rolling material 32 of the magnetic material moves along the inclined plane 33 of the magnetic medium 31 along the inclined surface 33 in the left, right, and so-called ± X directions, depending on the degree of vibration of the coil 15. Change intrinsic inductance.

In addition, when the tank 20 is excessively vibrated, the rolling material 32 of the magnetic material rapidly rises on the inclined surface 33 and falls by gravity. The intrinsic inductance of the coil 15 described above changes according to this transient vibration.

This change in inductance of the coil 15 is added to the capacitance value of the LC resonant circuit to appear as a change value of one resonant frequency.

If the vibration is weak with the change of the resonant frequency and the vibration is weak, carry out the dehydration by performing the inflated stroke as described above. If the vibration is severe, stop the induction motor to prevent the risk of excessive vibration. do.

The above-described water level / vibration sensor of the washing machine detects the water level as the change in inductance of the coil according to the vertical movement amount of the core during washing and rinsing stroke. It can be seen that the vibration amount is detected.

However, according to the patent application No. 98-33272, the assembly process is delayed by bonding the magnetic medium to the hook upper surface of the shielding member with an adhesive, and when the property of the adhesive is lost due to moisture or heat, or the adhesive area. Due to this narrow relationship, the magnetic field medium may be released from the hook surface of the shielding member.

In addition, the adhesive may be buried in the rolling body during the assembly process, thereby causing sticking of the rolling body.

Therefore, it is desirable to provide a low-cost sensor fixing device in terms of cost, and a more efficient and stable sensor fixing device in terms of reliability.

Accordingly, it is an object of the present invention to provide a water level / vibration sensor fixing device for a washing machine for integrating a ball fixing support member to a magnetic field medium and forcing it to be coupled to a shield member, which is proportional to the magnitude of vibration or impact of the washing tank. When the rolling body vibrates so that the ball fixing support member does not affect the vibration of the rolling body so that the unbalance is accurately detected.

Another object of the present invention is to provide a water level / vibration sensor fixing device of a washing machine for applying an adhesive to the ball fixing support member so as to prevent movement of the ball fixing support member by vibration during dehydration so that the ball fixing support member is fitted to the pusher of the shielding member. This fixing device is characterized by a simple structure.

It is still another object of the present invention to provide a water level / vibration sensor fixing device for a washing machine, in which a ball fixing support member is formed in a magnetic field medium and a pusher is integrally formed in the shielding member, respectively, so as to be hooked together. It is possible to combine stable without delay and not to be influenced by temperature / humidity of external environment.

1 to 3 is a configuration diagram provided in the description of the water level / vibration sensor of a general washing machine,

1 is an enlarged cross-sectional view showing the water level sensor mounted in the washing machine in a vertical direction;

2 is a view for explaining the principle of level measurement of the water level sensor,

3 is a configuration diagram of a vibration sensor separately mounted to the washing machine,

4 is a cross-sectional view of the unified water level / vibration sensor cut in the vertical direction according to the prior art,

5 to 7 is a configuration diagram showing a first embodiment provided in the description of the water level / vibration sensor fixing device of the washing machine according to the present invention,

5 is an exploded perspective view of the water level / vibration sensor fixing device;

Figure 6 is a view from below of the first ball fixing support member of Figure 5,

7 is a cross-sectional view showing a combination of the water level / vibration sensor fixing device of FIG.

8 is an exploded perspective view showing a second embodiment provided in the description of the water level / vibration sensor fixing device according to the present invention;

9 is a view from below of the second ball fixing support member of FIG. 8;

FIG. 10 is a cross-sectional view illustrating the water level / vibration sensor fixing device of FIG. 8 in combination. FIG.

<Description of Symbols for Main Parts of Drawings>

13 shielding member 31 magnetic field medium

100: first ball fixing support member 101 to 104 rib

105: first pusher 106: first interference fit

107: first support jaw 200: second ball fixing support member

201: first hook 205: second pusher

208: second interference fit 209: second hook

210 to 213: incision

The water level / vibration sensor fixing device of the washing machine according to an aspect of the present invention for achieving the above objects, the shield member for vertical movement in accordance with the water pressure through the water pressure transmission path of the tank, the inclined surface to form a predetermined angle in one direction Water level / vibration sensor consisting of a rolling body for measuring the amount of vibration by changing the inductance of the coil while moving left and right, vertically along the inclined surface of the magnetic medium in accordance with the eccentric rotation of the washing tank, the magnetic medium coupled to the upper surface of the shield member In:

(1) a ball fixing support member having a predetermined length on the bottom surface of the magnetic field medium and formed vertically downward; And

(2) a vertically upward pusher formed on the upper surface of the shielding member and projecting outwardly on the upper outer circumferential surface thereof, and including a support jaw for fixing the core and an approximately circular pusher having a predetermined length therein;

The ball fixing support member of the magnetic medium is forcibly coupled to the interference fitting portion of the pusher.

Optionally, the ball fixing support member has at least two ribs, and the ribs are formed integrally with each other at a predetermined angle and length.

Optionally, the interference fitting portion of the pusher has at least two rib grooves, and the rib grooves are formed vertically downward with a predetermined angle and length to each other.

Preferably, the ball fixing support member and the pusher fitting portion of the pusher are characterized in that the cross-shaped rib and rib groove formed.

In addition, according to the water level / vibration sensor fixing device of the washing machine according to the present invention, having a shielding member that moves vertically in accordance with the water pressure through the hydraulic pressure transmission path of the tank, the inclined surface to form a predetermined angle in one direction on the upper surface of the shielding member In a water level / vibration sensor consisting of a rolling body that measures the vibration amount by varying the inductance of the coil by moving the left and right and vertically along the inclined surface of the magnetic medium according to the eccentric rotation of the magnetic medium and the washing tank to be combined:

(1) a substantially circular ball fixing support member having a predetermined diameter and length on the bottom of the magnetic field medium and formed vertically downward; And

(2) a hook shape which is formed vertically upward with a predetermined length on the upper surface of the shielding member and larger than the diameter of the ball fixing support member in the center thereof, and protrudes outwardly on the upper outer peripheral surface to fix the core; An approximately circular pusher having a support jaw of;

The ball fixing support member of the magnetic medium is hooked to the interference fitting portion of the pusher.

Optionally, the first hook is formed to protrude upward from the center of the outer circumferential surface of the ball fixing support member.

In an embodiment, the second hook is formed to protrude downward from the center of the inner circumferential surface of the pusher.

In this way, the magnetic field medium is released from the pusher due to temperature / humidity, which is an influence of the external environment during use of the washing machine, by forcibly engaging or hooking the ball fixing support member to the pusher during the assembly process of the water level / vibration sensor. It can be seen that it is stably supported without this.

As a result, the inner rolling body moves along the magnetic field in proportion to the vibration or impact when the washing machine is dewatered, and the ball fixing support member does not affect the vibration of the rolling body, thereby enabling more accurate unbalance detection and assembly process time. This has the advantage of being shortened.

And, there may be a plurality of embodiments of the present invention, the following will be described in detail for the most preferred embodiment.

Through this preferred embodiment, the objects, other objects, features and advantages of the present invention will become more apparent from the following description with an embodiment according to the present invention in connection with the accompanying drawings shown for illustrative purposes.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the water level / vibration sensor fixing device of the washing machine according to the present invention.

In addition, in each figure used for description, the same component may be attached | subjected and shown about the component same as FIG. 4, and the overlapping description may be abbreviate | omitted.

5 to 7 is a configuration diagram showing a first embodiment provided in the description of the water level / vibration sensor fixing device of the washing machine according to the present invention.

The water level / vibration sensor fixing device of the washing machine according to the present embodiment is coupled to the upper end of the bellows 12 that is stretched and contracted by the water pressure according to the water level of the washing tub 13 and the vertical movement of the shield member It is formed vertically upward on the upper surface and protrudes outward on the upper outer circumferential surface thereof, and has a hook-shaped first support jaw 107 for fixing the core 14 and a first interference fit portion 106 having a predetermined length therein. The magnetic medium 31 having the first pusher 105 having a circular shape, the inclined surface 33 having a predetermined angle in one direction, and the bottom surface of the magnetic medium 31 are integrally vertically downward with a predetermined length. It is formed of a first ball fixing support member 100 is coupled to the first interference fit portion 106 of the first pusher 105 is coupled.

In addition, as shown in FIG. 6, the first ball fixing support member 100 includes four ribs 101 to 104 formed on the bottom surface of the magnetic field medium 31 at an angle of 90 degrees to each other. do.

In addition, the first interference fitting portion 106 of the first pusher 105 is configured as a cross rib groove having a predetermined length to face the ribs 101 to 104 of the first ball fixing support member 100. You may.

The water level / vibration sensor fixing device of the washing machine according to the present invention made as described above will be described in more detail with reference to FIGS. 5 to 7.

First, in the assembling process of the water level / vibration sensor, a predetermined length is applied to the bottom of the magnetic medium 31 having the inclined surface 33 at a predetermined angle so that the rolling body moves left and right and vertically according to the eccentric rotation of the washing tank. The first ball fixing support member 100 having the upper surface of the shielding member 13 is formed to be vertically upwardly coupled to the first interference fitting portion 106 of the first pusher 105 and coupled as shown in FIG. 7.

In this case, the first rib fitting portion 106 of the first pusher 105 having four ribs 101 to 104 formed at an angle of 90 degrees to the first ball fixing support member 100 having a predetermined diameter and length. ), The bonding force is improved, and the magnetic field medium 31 due to humidity and heat, which are influences of the external environment during long-term use of the washing machine, is stably coupled without being separated from the first pusher 105.

In this case, in order to further improve the coupling force between the first pusher 105 and the first ball fixing support member 100, a cross rib groove having a predetermined length is formed in the first interference fitting portion 106 to support the first ball fixing. It is also possible to forcibly engage with the ribs 101 to 104 of the member 100.

In addition, two or more ribs of the first ball fixing support member 100 may be formed to be coupled to the first interference fitting portion 106 of the first pusher 105 by being coupled to each other. The first interference fitting portion 106 may have rib grooves corresponding to the number of the ribs.

As described above, even when vibration and impact due to unbalance of the laundry are generated during the dehydration operation with the washing machine having completed the assembly process, the rolling body inside the inclined surface 33 of the magnetic field medium 31 is proportional to the magnitude of the vibration and impact. It moves along (vibrates), and the first ball fixing support member 100 is not shaken about the first pusher 105 due to the stable coupling with the first pusher 105. As a result, the first ball fixing support member 100 does not affect the vibration of the rolling body 31, and as a result, there is an effect that the unbalance detection is accurately performed.

On the other hand, in order to improve the coupling force between the first ball fixing support member 100 formed integrally with the magnetic field medium 31 and the first pusher 105 formed integrally with the shielding member 13, the first ball fixing support member ( The adhesive may be applied to the surfaces of the ribs 101 to 104 of the 100, and may be pressed into the first interference fitting portion 106 of the first pusher 105 to be coupled. At this time, the first ball fixing support member 100 and the first pusher 105 have a more stable bonding force by solidification of the adhesive.

8 to 10 illustrate a water level / vibration sensor fixing device of the washing machine according to the second embodiment of the present invention.

In the figure, a shielding member 13 coupled to an upper end of the bellows 12 that is stretched and contracted by water pressure according to the water level of the washing tank, and vertically moving, and having a predetermined length on the upper surface of the shielding member in a vertical upward direction. A second interference fitting portion 208 having a predetermined diameter and length at its center portion, a second support jaw 207 projecting outwardly on the upper outer circumferential surface and fixing the core 14; An approximately circular second pusher 205 having an elastic shape having cut portions 210 to 213 vertically cut at intervals, and a second hook 209 protruding inwardly at an approximately center of an inner circumferential surface of the second pusher 205. And a magnetic medium 31 having an inclined surface 33 having a predetermined angle in one direction, and formed on the bottom of the magnetic medium 31 in a vertical downward direction with a predetermined diameter and length. 2nd circular shape which is forcibly fitted to the 2 interference fitting part 208 The first hook 201 is formed to protrude outward from the center of the ball fixing support member 200 and the outer circumferential surface of the second ball fixing support member 200 to elastically couple with the second hook 209 of the second pusher 205. It is composed of

The water level / vibration sensor fixing device of the washing machine according to the second embodiment of the present invention made as described above will be described with reference to FIGS. 8 to 10, and the same parts as in FIG. There is also.

First, in the assembling process of the water level / vibration sensor, as shown in Fig. 8, the magnetic medium 31 having the inclined surface 33 of the predetermined angle so that the rolling body moves left and right and vertically in accordance with the eccentric rotation of the washing tank. The second of the second pusher 205 formed vertically upward with a predetermined length on the upper portion of the shield member 13 by integrally forming the circular second ball fixing support member 200 smaller than the diameter and having a predetermined length; It fits in the interference fitting part 208 and combines like FIG.

In other words, as shown in FIG. 9, the second ball fixing support member 200 is formed at the center of the second pusher 205 with the second ball fixing support member 200 formed on the bottom surface of the magnetic medium 31 having a predetermined diameter and length. When the second pusher 205 of the second pusher 205 is formed larger than the diameter of 200 and is pushed downward from the top, the second ball fixing support member 200 is moved to the second of the second pusher 205. The coupling is made while slidingly guided along the interference fit portion 208.

At this time, the first hook 201 protruding outwardly to the center of the outer circumferential surface of the second ball fixing support member 200 protrudes inward to the center of the inner circumferential surface of the second pusher 205 inwardly. When it reaches to the position of 209 and is interposed, the upper end of the second pusher 205 is opened in the outward direction by the incisions 210 to 213 vertically cut at equal intervals on the axis.

Here, the cutouts 210 to 213 are vertically cut from the upper part of the second pusher 205 to the lower end of the second hook 209 as shown in FIG. 10.

Subsequently, when the first hook 201 is continuously inserted and is out of the position of the second hook 209, the upper end of the second pusher 205 is restored to its original position, and the first and second hooks 201 are as shown in FIG. 12. , 209 is stably coupled, and the lower end of the second ball fixing support member 200 is stably inserted and coupled to the second interference fitting portion 208 of the second pusher 205.

As described above, even when vibration and impact due to unbalance of the laundry are generated during the dehydration operation with the washing machine in which the assembling process is completed, as in the above-described first embodiment, only the internal rolling body is proportional to the magnitude of the vibration and impact. Moving along the inclined surface 33 of the magnetic field medium 31, the second ball fixing support member 200 does not affect the vibration of the rolling body, as a result, there is an effect that the unbalance detection is accurate.

On the other hand, as a comparative example, in contrast to the conventional technology, that is, to adhere and fix the magnetic field medium for detecting the vibration of the washing machine with an adhesive to the shielding member, the present invention provides a ball fixing support member to the magnetic field medium, the shielding member It can be seen that the pusher is integrally formed in the ball fixing support member and the pusher forcibly fitting or hooking to stably fix the magnetic medium.

As a result, according to the present invention, since the ball fixing support member does not affect the rolling body vibration of the magnetic field during dehydration, it is possible to perform more accurate detection of unbalance, and also to influence the external environment due to long-term use. It is possible to prevent the magnetic medium from being separated by temperature / humidity.

As described above, according to the present embodiment, the vibration of the washing machine due to the washing water level and the washing of the laundry during the dehydration stroke can be more precisely performed, and the vibration detection error according to the prior art, the dehydration time, and the departure of the magnetic field medium. Not only does this occur, but the assembly process time of the water level / vibration sensor is shortened.

According to this application example, it is possible to provide a low-cost water level / vibration sensor fixing device in terms of cost, and a more efficient and stable water level / vibration sensor fixing device in terms of reliability.

In addition, although specific embodiments of the present invention have been described and illustrated above, it is obvious that the present invention may be variously modified and implemented by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments should fall within the appended claims of the present invention.

It is clear from the above description that, according to the water level / vibration sensor fixing device of the washing machine according to the present invention, the ball fixing support member is forcibly coupled to the pusher during the assembly process of the water level / vibration sensor or by hooking, There is an effect that the magnetic medium caused by the influence of temperature / humidity and the like is stably fixed without being separated from the pusher.

In addition, when the washing machine is dewatered, the rolling body vibrates along the magnetic medium in proportion to the vibration or impact, and the ball fixing support member does not affect the vibration of the rolling body, thus enabling more accurate unbalance detection and a significant assembly process time. This shortens the effect.

Claims (8)

A shielding member that moves vertically according to the hydraulic pressure of the tank, a magnetic medium coupled to the upper surface of the shielding member having an inclined surface having a predetermined angle in one direction, and a unique inductance of the coil while moving left and right and vertically along the inclined surface of the magnetic medium. In the water level / vibration sensor consisting of a rolling body which changes: (1) a ball fixing support member having a predetermined length formed on the bottom surface of the magnetic medium smaller than the diameter of the magnetic medium and vertically downward; And (2) a vertically upwardly formed upper surface of the shielding member and protruding outward from the upper outer circumferential surface thereof to include a hook-shaped support jaw for fixing the core and an approximately circular pusher having an interference fit portion of a predetermined length therein; , The water level / vibration sensor fixing device of the washing machine, characterized in that for coupling the ball fixing support member of the magnetic medium to the interference fitting portion of the pusher. The method of claim 1, The ball fixing support member has at least two ribs, the ribs are water level / vibration sensor fixing device characterized in that the ribs are formed integrally with a predetermined angle and a predetermined length. The method of claim 1, The interference fitting portion of the pusher has at least two or more rib grooves, the rib groove is a water level / vibration sensor fixing device of the washing machine, characterized in that formed in a vertical downward with a predetermined angle to each other. The method of claim 2 or 3, The water level / vibration sensor fixing device of the washing machine, characterized in that the interference fitting portion of the ball fixing support member and the pusher are formed of cross-shaped ribs and rib grooves having a predetermined length. A shielding member that moves vertically according to the hydraulic pressure of the tank, a magnetic medium coupled to the upper surface of the shielding member having an inclined surface having a predetermined angle in one direction, and a unique inductance of the coil while moving left and right and vertically along the inclined surface of the magnetic medium. In the water level / vibration sensor consisting of a rolling body which changes: (1) a substantially circular ball fixing support member having a predetermined diameter and length on the bottom of the magnetic field medium and formed vertically downward; And (2) an interference fit portion having a predetermined length on the upper surface of the shielding member and being vertically upward and having a predetermined length larger than the diameter of the ball fixing support member at its central portion, protruding outwardly on the upper outer peripheral surface of the core; And a substantially circular pusher having a support jaw to fix the; The water level / vibration sensor fixing device of the washing machine, characterized in that for coupling the ball fixing support member of the magnetic medium to the interference fitting portion of the pusher. The method of claim 5, The water level / vibration sensor fixing device of the washing machine, characterized in that the hook is formed to protrude outward in the center of the outer peripheral surface of the ball fixing support member. The method of claim 5, The water level / vibration sensor fixing device of the washing machine, characterized in that the hook is formed in the inner circumferential surface of the pusher to protrude inward. The method of claim 5, The upper part of the pusher vertically cut at equal intervals so that the upper end portion of the pusher to expand and contract in the inner and outer direction when the ball fixing support member is inserted, characterized in that the washing machine.