KR100289432B1 - Apparatus for fixing sensor water level/vibration of washing machine - Google Patents

Abstract

The present disclosure relates to a level / vibration sensor fixing device for a washing machine that more stably fixes the level / vibration sensor to increase the accuracy of detecting the level and vibration of the washing machine.

The water level / vibration sensor fixing device of the disclosed washing machine includes a guide member having a predetermined diameter and length and formed vertically upward, a support jaw protruding from an upper end of the outer circumferential surface of the guide member to hook the core, and an inner circumferential surface of the guide member. A pusher including an annular locking jaw protruding inwardly; A rolling guide member having a predetermined angle and a predetermined diameter so that the rolling body is inclined, a rib formed vertically downward on the bottom of the rolling guide member, and protruded in the longitudinal direction at the center of the bottom of the rib to guide the pusher. It consists of a rolling body support part including an elliptical interference fit member forcibly fitted to the member and hooked.

Accordingly, the rolling body support having the rolling guide member is coupled to the guide member of the pusher by hooking, and thus the water level / vibration sensor is stably fixed and the assembly process time is 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 washing water level detection of the washing machine at the same time, and more particularly, to detect the vibration caused by the washing water level and the washing of the laundry as a change value of LC resonant frequency. The present invention relates to a water level / vibration sensor fixing device of a washing machine that supports the water level / vibration sensor more stably to accurately sense the washing water level and the vibration amount and to make the assembly process simple.

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 pusher 13 having a hook shape vertically sealingly coupled to the upper end of the bellows to shield the water pressure, and installed on the central inner wall of the housing 11 with a unique inductance value. Coil 15 having a cylindrical shape spaced apart and installed at a predetermined distance in the vertical direction, and coupled to the upper surface of the pusher 13 to change the inductance value inherently while vertically moving the inner space of the coil 15. won 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 is no longer progressed by the pusher 13 sealed in the vertical direction on the upper portion of the bellows 12, and the bellows 12 expands and contracts in proportion to the water pressure.

When the bellows 12 extends in the vertical direction, the pusher 13 and the cylindrical core 14 coupled thereto move upward in the vertical direction through the inner space of the coil 15 having a larger diameter and inherent inductance. (Step ST10), the inductance of the coil 15 is changed in accordance with 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 pusher 13 and 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 according 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 of installation and mechanical complexity 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, the ball-shaped pusher 13 is coupled to a rolling body support part formed to be inclined at a predetermined angle on the upper end, and the inclined surface of the rolling body support part moves the inclined surface according to the vibration of the washing tub. The rolling body like (Ball) is raised.

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 pusher (13) having a bellows (12) which expands and contracts by water pressure according to the water level in the washing tank, and has a hook shape vertically sealingly coupled to the upper end of the bellows (12) to shield the transmission of water pressure. The hook 15 is coupled to the outer circumferential surface of the pusher 13 by the coil 15 installed on the central inner wall of the housing 11 and has a unique inductance, thereby vertically moving the inner space of the coil 15 according to the vertical movement of the pusher 13. And a cylindrical core 14 for changing the inductance of the coil 15, a cylindrical support member 17 coupled to the upper end of the coil 15 to support the coil 15, and the support member. Of the cap 18 and the core 14 to close the upper opening of the 17 The core 14 includes a spring 16 having a coil shape interposed in the vertical direction on the bottom surface and the bottom of the cap 18 to return the core 14 to its original position, and an inclined surface 33 having a predetermined angle in one direction. Left and right along the inclined surface 33 of the rolling body support part 31 and the rolling body support part 31 in accordance with the eccentric rotation of the washing tub and coupled to the upper surface 34 of the pusher 13 at a certain distance from the upper end of the; Intrinsic inductance of the rolling material 32 of magnetic material which changes the inductance of the coil 15 while moving vertically, the vertical movement of the core 14 and the left and right, vertical movement of the rolling body 32. It consists of an LC resonant circuit that generates a resonant frequency by adding a fixed capacitance to it.

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 rolling body support part 31. do.

If the rolling body 32 is located at the right end of the inclined surface 33 of the rolling body support part 31, the inductance of the coil 15 does not change.

Balanced by the uniform arrangement of the laundry, if the rolling material 32 of the magnetic material such as a ball is continuously positioned at the right end of the rolling body support portion 31, the same resonance frequency is continuously generated in the LC resonant circuit. During the dehydration time determined by the induction motor accelerates and rotates 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 surface 33 of the rolling body support part 31 along the inclined surface 33 according to the degree of vibration thereof, while the coil 15 moves along the so-called ± X direction. Varies the inductance of

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 above patent application No. 98-33272, the assembly process is not only delayed by the adhesive bonding to the upper surface of the pusher by the adhesive, but also the loss of the adhesive property due to moisture or heat or the rolling body support Due to the narrow relationship between the adhesive and the pusher, the rolling body support may be separated from the pusher.

In addition, during the assembling process of the water level / vibration sensor, the adhesive may be buried in the rolling body, 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 easy assembly process 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 which is easily fixed by a hook coupling between a rolling body support and a pusher, and the device has a rolling body in proportion to the magnitude of vibration or impact of the washing tank. The rolling body support part does not affect the vibration of the rolling body when vibrating.

It is another object of the present invention to provide a water level / vibration sensor fixing device for a washing machine which allows the rolling body support and the pusher to be combined by elastic interference fit, and the device is capable of stable coupling without time delay during the assembling process. It is characterized by not being affected by temperature / humidity.

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 11 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,

FIG. 5 is a cross-sectional view of the water level / vibration sensor fixing device mounted to the washing machine in a vertical direction;

6 is an exploded perspective view showing an enlarged portion A of the water level / vibration sensor fixing device of FIG.

FIG. 7 is a cross-sectional view of the first rolling body support of FIG. 6 cut in the vertical direction; FIG.

8 is a view from below of the first rolling body support of FIG. 6;

FIG. 9 is a cross-sectional view of the first pusher of FIG. 6 taken vertically;

FIG. 10 is a view from above of the first pusher of FIG. 6;

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

12 to 18 is a configuration diagram showing a second embodiment provided in the description of the water level / vibration sensor fixing device of the washing machine according to the present invention,

12 is a cross-sectional view of the water level / vibration sensor fixing device mounted to the washing machine in a vertical direction cut;

FIG. 13 is an exploded perspective view illustrating an enlarged part B of the water level / vibration sensor fixing device of FIG. 12;

FIG. 14 is a cross-sectional view of the second rolling body support part of FIG. 13 cut in the vertical direction; FIG.

15 is a view from below of the second rolling body support of FIG. 13;

FIG. 16 is a cross-sectional view of the second pusher of FIG. 13 taken vertically;

17 is a view from above of the second pusher of FIG. 13;

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

<Description of Symbols for Main Parts of Drawings>

12: bellows 32: rolling body

14 core 15 coil

100: first pusher 101: first guide member

102: first support jaw 103: first locking jaw

104: first guide hole 105: first shielding member

200: first rolling body support 201: first rolling guide member

202 to 205: rib 206: first interference fitting member

The water level / vibration sensor fixing device of the washing machine according to an aspect of the present invention for achieving the above object, the pusher vertical movement according to the water pressure through the hydraulic pressure transmission path of the tank, the pusher having a predetermined inner diameter and length The core is hooked to the outer circumferential surface, the rolling body support portion coupled to the upper surface of the pusher having a predetermined angle in one direction, the left and right, vertical movement along the inclined surface of the rolling body support portion in accordance with the eccentric rotation of the washing tub of the coil In a water level / vibration sensor consisting of a rolling body that measures the amount of vibration by varying the inductance inherent:

The pusher is,

(1) a circular guide member having a predetermined diameter and length and formed vertically upward and having a guide hole in a longitudinal direction thereof;

(2) a support projection protruding outwardly on an upper end of an outer circumferential surface of the guide member to hook the core; And

(3) comprises an annular locking projection which is formed to protrude inward in the center of the inner circumferential surface of the guide member,

The rolling body support portion,

(1) rolling guide member having a predetermined angle and a predetermined diameter so that the rolling body inclined movement;

(2) a rib formed vertically downward with a predetermined length on the bottom surface of the rolling guide member; And

(3) It characterized in that it comprises an interference fitting member protruding in the longitudinal direction in the center of the bottom of the rib in the longitudinal direction and is elastically fitted to the engaging jaw of the pusher.

Optionally, the ribs of the rolling body support portion have at least two and are divided at equal intervals with respect to the axis of the rolling guide member.

Preferably, when the interference fitting member is divided into an X-axis and a Y-axis, the interference fitting member has an elliptical shape with an increased area on the X-axis with respect to a central portion of the Y-axis.

Optionally, the guide member of the pusher is cut and divided at equal intervals from an upper end to a part or more where the locking jaw is located.

Optionally, the locking jaw is characterized in that it is located opposite to each other divided into the equal intervals.

In addition, according to the water level / vibration sensor fixing device of the washing machine according to the present invention, a pusher vertically moving in accordance with the water pressure through the pressure transmission path of the tank, the core having a predetermined inner diameter and length hooked to the outer peripheral surface of the pusher, one side Rolling body support portion coupled to the upper surface of the pusher having a predetermined angle in the direction, in accordance with the eccentric rotation of the washing tub to move the left and right, vertically along the inclined surface of the rolling body support by varying the inductance of the coil by varying the amount of vibration For a water level / vibration sensor with a rolling body to measure:

The pusher is,

(1) a circular guide member having a predetermined diameter and length and formed vertically upward and having a guide hole in a longitudinal direction thereof;

(2) a support projection protruding outwardly on an upper end of an outer circumferential surface of the guide member to hook the core; And

(3) includes a circular first locking jaw formed to protrude inward in an approximately center of an inner circumferential surface of the guide member,

The rolling body support portion,

(1) rolling guide member having a predetermined angle and a predetermined diameter in one direction;

(2) a rib formed vertically downward with a predetermined length on the bottom surface of the rolling guide member;

(3) an interference fitting member protruding in the longitudinal direction from the center of the bottom of the rib and vertically cut relative to the axis of the rolling guide member; And

(4) It characterized in that it comprises a second locking jaw protruding outward to the center of the outer peripheral surface of the interference fitting member elastically tightly coupled to the first locking jaw of the pusher.

Optionally, the interference fitting member is conical in shape and has an upper end bent inwardly to have a second locking jaw.

In this way, the rolling body support having the rolling guide member is forcibly hooked into the guide hole of the pusher so that the rolling body moves left and right and vertically during the assembly process of the water level / vibration sensor. It can be seen that the rolling body supporting portion due to humidity or the like is stably fixed without being separated from the pusher.

As a result, when the washing machine is dewatered, the rolling body inside moves vertically and vertically along the rolling guide member of the rolling body support in proportion to the vibration or impact, and the rolling body support does not affect the vibration of the rolling body so that more accurate unbalance detection can be achieved. It is possible to further reduce the assembly process time.

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 11 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 first embodiment of the present invention is connected through the tank 20 and the water pressure transmission passage 19, the bellows to expand and contract in the vertical direction by the water pressure according to the water level in the washing tank (12) and the first pusher 100 of elastic material sealingly coupled to the upper end of the bellows 12 in a vertical direction and vertically moving the inner space of the coil 15 in accordance with the telescopic movement of the bellows 12; , Is coupled to the first pusher 100 is coupled to the rolling body 32 is mounted is composed of a first rolling body support 200 to move left and right, vertically in accordance with the eccentric rotation of the washing tank.

6, 9 and 10, the first pusher 100 is a circular shape having a predetermined diameter in the upper end portion of the bellows 12 and sealed to shield the water pressure of the hydraulic transmission passage (19) The first shielding member 105 on the upper surface of the first shielding member 105 and the upper surface of the first shielding member 105 and having a predetermined diameter and a predetermined length, and are formed in a vertically upward direction. In addition, the circular first guide member 101 having the incisions 106 to 106c vertically inclined at equal intervals of 90 degrees from the upper end to a predetermined position on the central axis, and the upper end of the first guide member 101 A first support jaw 102 for protruding outwardly on the outer circumferential surface to secure the circular core 14 and a hook-shaped first latching jaw 103 protruding inward in the center of the inner circumferential surface of the first guide member 101. The first pusher (100) is the expansion and contraction of the bellows (12) Depending is an internal space of the coil 15 to vertical movement.

In addition, as shown in FIGS. 6, 7, and 8, the first rolling body support part 200 has a predetermined angle of the inclined surface 201a such that the rolling body 32 is inclined in one side direction and in the vertical direction. And a first rolling guide member 201 having a predetermined diameter, a plurality of first ribs 202 to 205 formed vertically downward with a predetermined length on the bottom surface of the first rolling guide member 201, and It is formed of a first interference fitting member 206 having an elliptical shape which is protruded in the longitudinal direction in the center of the bottom surface of the ribs to be coupled to the first guide member 101 of the first pusher 100, the first rolling body support ( The first interference fitting member 206 of the 200 is elastically fitted to the first locking jaw 103 along the first guide hole 104 of the first guide member 101 and is coupled to the hook.

In addition, as shown in FIG. 8, the first ribs 202 to 205 of the first rolling body support part 200 are vertically downwardly formed at an angle of 90 degrees to the bottom surface of the first rolling guide member 201. do.

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 11.

First, in the assembling process of the water level / vibration sensor, FIG. 6 is shown on the bottom surface of the first rolling guide member 201 having the inclined surface 201a at a predetermined angle so that the rolling body 32 moves left and right in accordance with the eccentric rotation of the washing tank. 8 to 1, the first rolling retention formed by integrally forming the first ribs (202 to 205) having a predetermined length and the elliptical first interference fitting member 206 integrally formed in the center of the bottom of the ribs Branch portion 200 is forcibly fitted to the first guide member 101 of the first pusher 100 formed vertically upward on the upper surface of the bellows 12, as shown in FIG.

In other words, the four first ribs 202 to 205 formed vertically downward with an angle of 90 degrees to the first rolling guide member 201 of the first rolling body support 200 and downward in the center of their bottom surfaces. The first rolling retaining member having the elliptical shape of the first interference fitting member 206 formed to protrude into the first guide hole 104 of the first guide member 101 having a predetermined diameter and length, The ribs 202 to 205 of the branch portion 200 and the elliptical first interference fitting member 206 slide together along the first guide hole 104 of the first guide member 101 to be engaged.

In this case, as shown in FIGS. 9 and 10, the first locking jaw protruding inward in the center of the inner circumferential surface of the first guide member 101 as shown in FIGS. 9 and 10. When it reaches to the position of 103 and is clamped, the upper end of the first guide member 101 is opened outward by the incisions 106 to 106c vertically cut at equal intervals on the axis.

Here, the cutouts 106 to 106c of the first pusher 100 are spaced at equal intervals from an upper end of the first guide member 101 to an area at which the first catching jaw 103 is located, as shown in FIG. 6. Vertical incision

As shown in FIG. 7, when the first interference fitting member 206 is divided into an X-axis and a Y-axis, the area of the first interference-fitting member 206 increases in the X-axis with respect to the central portion of the Y-axis. It has an elliptical shape, and its increased area is defined to be larger than the inner diameter of the first locking step 103 of the first pusher 100.

Subsequently, an elliptical first interference fitting member 206 having a diameter larger than the inner diameter formed by the first locking jaw 103 of the first pusher 100 is continuously inserted to position the first locking jaw 103. When the upper end of the first guide member 101 is restored to its original position as shown in FIG. 11, the first interference fitting member 206 and the first pusher 100 of the first rolling body support 200 are removed. The first locking jaw 103 is stably coupled, and the first ribs 202 to 205 are coupled to the inner circumferential surface of the first guide member 101 by the cutouts 106 to 106c with elastic contact.

As such, the first ribs 202 to 205 of the first rolling body support part 200 are coupled to the first guide hole 104 of the first guide member 101 by being coupled to each other, and have an elliptical first interference fitting member. As the so-called hook is coupled to the first locking jaw 103 of the first guide member 101, the binding force is improved, and the humidity and heat, which are influenced by the external environment during long-term use of the washing machine, 1 The rolling body support 200 is stably coupled without being separated from the first pusher 100.

In this way, even when vibration and shock caused by unbalance of laundry occurs when the water level / vibration sensor fixing device having the assembly process completed is installed in the washing machine, the rolling body 32 is proportional to the magnitude of the vibration and shock. Is moved (vibrated) along the inclined surface 201a of the first rolling guide member 201, and the first rolling body support 200 is stably coupled to the first pusher 100 due to the relationship of the first pusher 100. Does not shake around the center. As a result, the first rolling body support part 200 does not affect the vibration of the rolling body 32, and as a result, the unbalance detection is accurately performed.

12 to 18 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 bellows 12 connected to the shank 20 and a hydraulic transmission passage 19 to expand and contract in the vertical direction by water pressure according to the water level in the washing tank, and the upper end of the bellows 12 in the vertical direction. Sealingly coupled to the second pusher 300 of elastic material and vertically moving the inner space of the coil 15 in accordance with the expansion and contraction of the bellows (12), is coupled to the second pusher 300 is coupled to the rolling body ( 32) is mounted is composed of a second rolling body support 400 to move left and right, vertically in accordance with the eccentric rotation of the washing tank.

13, 16, and 17, the second pusher 300 is configured in the same manner as the first pusher 100 is sealed to the upper end of the bellows 12, the specific configuration thereof will be omitted. .

13 to 15, the second rolling body support part 400 has a predetermined angle of the inclined surface 401a and a predetermined angle so that the rolling body 32 is inclined in one side direction and in the vertical direction. A second rolling guide member 401 having a diameter, a plurality of second ribs 402 to 405 formed vertically downward with a predetermined length on a bottom of the second rolling guide member 401, and bottoms of the ribs; A conical second interference fitting member 406 and a conical second interference fitting member having a cutout 408 which is protruded in a longitudinal direction at a center in the longitudinal direction and is perpendicular to the axis of the second rolling guide member 401. The third locking step 407 is formed on the upper end of the 406, the third locking step 407 formed in the second interference fitting member 406 of the second rolling body support 400 is the second guide member Along with the second guide hole 304 of the 301, the second locking jaw 303 is fitted with an elastic force to the hook coupling It is configured to.

As described above, the second ribs 402 to 405 of the second rolling body support part 400 are vertically downwardly formed at an angle of 90 degrees to the bottom surface of the second rolling guide member 401 as shown in FIG. 15. do.

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. There is also.

First, in the assembling process of the water level / vibration sensor, FIG. 14 shows the bottom surface of the second rolling guide member 401 having the inclined surface 401a at a predetermined angle so that the rolling body 32 moves left and right in accordance with the eccentric rotation of the washing tank. And as shown in FIG. 13, the second ribs 402 to 405 having a predetermined length are integrally formed as shown in FIG. 15, and the conical second interference fitting member 406 is vertically formed as shown in FIG. 13. The second rolling body support part 400 formed to protrude into the second guide member 301 of the second pusher 300 vertically upwardly formed on the upper surface of the bellows 12 is coupled as shown in FIG. 18.

In other words, according to the second embodiment of the present invention, as in the first embodiment, the second rolling guide member 401 of the second rolling body support 400 has an angle of 90 degrees to each other and is formed vertically downward. Second guide holes of the second guide members 301 having predetermined diameters and lengths of the second ribs 402 to 405 and the conical second interference fitting members 406 formed to protrude downward in the center of the bottom surfaces thereof. The second ribs 402 to 405 of the second rolling body support 400 and the conical second interference fitting member 406 are pressed to the second of the second guide member 301 after the force is pushed from above after being fitted to the 304. The sliding is guided along the guide hole 304 is made.

At this time, when the second ribs 402 to 405 of the second rolling body support part 400 are guided along the second guide hole 304 of the second guide member 301, an incision vertically cut at equal intervals on the axis thereof is performed. The upper end of the second guide member 301 is opened outward by the parts 306 to 306c.

That is, the second ribs of the second rolling body support part 400 may be formed due to a relationship in which the outer diameters of the second ribs 402 to 405 are slightly larger than the inner diameter of the second guide hole 304 of the second guide member 301. 402 to 405 are elastically constrained.

Also, as shown in FIGS. 16 and 17, the second interference fitting member 406 having a conical shape protrudes inward in the center of the inner circumferential surface of the second guide member 301. When it reaches to the position and is fitted, the conical second interference fitting member 406 is forced by being retracted inward with elastic force by the cutout 408.

Here, the cut portions 306 to 306c of the second pusher 300 are spaced at equal intervals from an upper end of the second guide member 301 to at least a portion where the second locking jaw 303 is located, as shown in FIG. 13. Vertical incision

As also shown in Fig. 14, the second interference fitting member 406 has a conical shape whose area decreases toward the lower end, and the diameter of the second interference fitting member 406 of the conical shape is the second pusher ( The second locking jaw 303 of the 300 is defined to be larger than the inner diameter formed.

Subsequently, the second interference fitting member 406 having a conical shape larger in diameter than the inner diameter formed by the second locking jaw 303 of the second pusher 300 is continuously inserted to position the second locking jaw 303. When the second interference fitting member 406 is returned to its original position by the cutout 408, the second locking fitting 406 and the second locking jaw 407 and the second interference fitting member 406 are returned to each other. The second locking jaw 303 of the pusher 300 is stably coupled, and the second ribs 402 to 405 are elastically coupled to the inner circumferential surface of the second guide member 301 of the second pusher 300.

As such, the second ribs 402 to 405 of the second rolling member support 400 are coupled to the second guide hole 304 of the second guide member 301 by being coupled to each other, and have a conical second interference fitting member. By the so-called hook coupling of the 306 to the second locking jaw 303 of the second guide member 301, the coupling force is improved, and the humidity and heat, which is an influence of the external environment during long-term use of the washing machine, 2 rolling body support member 400 is stably coupled without being separated from the second pusher (300).

In this way, even when vibration and shock caused by unbalance of laundry occurs when the water level / vibration sensor fixing device having the assembly process completed is installed in the washing machine, the rolling body 32 is proportional to the magnitude of the vibration and shock. Is moved (vibrated) along the inclined surface 401a of the second rolling guide member 401, and the second rolling body support 400 is stably coupled to the second pusher 300 due to the relationship of the second pusher 300. Does not shake around the center. As a result, the second rolling body support part 400 does not affect the vibration of the rolling body 32, and as a result, the unbalance detection is accurately performed.

On the other hand, as a comparative example, in contrast to the prior art, that is, to adhere and fix the rolling guide member for detecting the vibration of the washing machine with an adhesive to the pusher, the present invention is a rolling support body, the bellows and It can be seen that the pusher is integrally formed on the shielding member to be coupled to the rolling member support and the pusher to securely lock the rolling guide member by engaging or hooking the pusher.

As a result, according to the present invention, since the rolling body support part does not affect the rolling body vibration of the rolling guide member during the dehydration stroke, it is possible to perform more accurate detection of unbalance, and also to influence the external environment due to long-term use. The phenomenon that the cloud guide member is separated by the temperature / humidity, etc. can be prevented.

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 precise, and thus the vibration detection error, the dehydration time, and the rolling guide member according to the prior art. Not only does not occur, but also 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, a simple structure forcibly hooking the rolling body support part integrally formed with the rolling guide member to the pusher during the assembly process of the water level / vibration sensor is coupled to the pusher. Since the work process is simple, the defective rate is reduced.

In addition, when the washing machine is dewatered, the rolling body inside vibrates along the rolling guide member in proportion to the vibration or impact, and the rolling body supporting part does not affect the vibration of the rolling body, thereby enabling more accurate unbalance detection and shortening the assembly process time. And mold manufacturing cost is reduced.

Claims (8)

A pusher vertically moving according to the water pressure of the washing tub, a core hooked to the outer circumferential surface of the pusher, a rolling body support coupled to the upper surface of the pusher, and a rolling to change the inductance of the coil while moving along the upper surface of the rolling body support For water level / vibration sensors consisting of: The pusher is, (1) a guide member having a predetermined diameter and length and formed vertically upward and having a guide hole in the longitudinal direction thereof; (2) a support projection protruding outwardly on an upper end of an outer circumferential surface of the guide member to hook the core; And (3) comprises an annular locking projection which is formed to protrude inward in the center of the inner circumferential surface of the guide member, The rolling body support portion, (1) rolling guide member having a predetermined angle and a predetermined diameter so that the rolling body inclined movement; (2) a rib formed vertically downward on the bottom surface of the rolling guide member; And (3) The water level / vibration sensor fixing device of the washing machine, comprising an interference fitting member which protrudes in the longitudinal direction at the center of the bottom of the rib and is elastically fitted to the locking jaw of the pusher. The method of claim 1, And at least two ribs of the rolling body support are divided at equal intervals with respect to the axis of the rolling guide member. The method of claim 1, When the interference fitting member is divided into an X-axis and a Y-axis, the interference fitting member is a water level / vibration sensor fixing device of the washing machine, characterized in that an elliptical shape with an increased area on the X-axis with respect to the center of the Y-axis. The method of claim 1, The guide member of the pusher is a water level / vibration sensor fixing device of the washing machine, characterized in that divided by cutting at equal intervals from the upper end to the part or more where the locking step is located. The method according to claim 1 or 4, The locking jaw is a water level / vibration sensor fixing device of the washing machine, characterized in that located opposite to each other in the divided parts at equal intervals. A pusher vertically moving according to the water pressure of the washing tub, a core hooked to the outer circumferential surface of the pusher, a rolling body support coupled to the upper surface of the pusher, and a rolling to change the inductance of the coil while moving along the upper surface of the rolling body support For water level / vibration sensors consisting of: The pusher is, (1) a guide member having a predetermined diameter and length and formed vertically upward and having a guide hole in the longitudinal direction thereof; (2) a support projection protruding outwardly on an upper end of an outer circumferential surface of the guide member to hook the core; And (3) comprises an annular first locking projection which is formed to protrude inward in an approximately center of an inner circumferential surface of the guide member, The rolling body support portion, (1) rolling guide member having a predetermined angle and a predetermined diameter in one direction; (2) a rib formed vertically downward with a predetermined length on the bottom surface of the rolling guide member; (3) an interference fitting member protruding in the longitudinal direction from the center of the bottom of the rib; And (4) The water level / vibration sensor fixing device of the washing machine, comprising a second locking jaw that protrudes outwardly to the center of the outer circumferential surface of the interference fitting member and is elastically clamped and coupled to the first locking jaw of the pusher. The method of claim 6, The interference fitting member is a conical shape of the diameter becomes smaller toward the vertical direction with respect to the axis and the conical upper end is bent inwardly to form a water level / vibration sensor fixing device of the washing machine, characterized in that it has a second locking jaw. The method of claim 6, The interference fitting member is a water level / vibration sensor fixing device of the washing machine, characterized in that the incision perpendicular to the axis.