JPH0549574A - Dust collection level display device for electric cleaner - Google Patents

Abstract

(57) [Abstract] [Purpose] Compact size, reduced parts count, low cost,
It is an object of the present invention to provide a dust collection amount display device for an electric vacuum cleaner which has a small mounting space and can be applied to all electric vacuum cleaners having different performances and which has good versatility. [Structure] A thin bellows 8 which expands and contracts in the longitudinal direction is integrally formed on the atmospheric pressure side of a communication pipe 9 made of a soft material such as rubber, and airtightly connected to a hole provided in an upper part communicating with the dust collection chamber 4. , A green pointer A13 and a red pointer B16 which are hooked to a T-shape 12 provided at the end of the bellows 8 on the atmospheric pressure side and are coupled with each other so as to be displaced in conjunction with the expansion and contraction of the bellows 8 by concave and convex fitting. Is provided and configured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collection amount display device for an electric vacuum cleaner.

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for miniaturization of dust collection amount display devices used in vacuum cleaners.

The structure of a conventional dust collection amount display device for an electric vacuum cleaner of this type will be described with reference to FIGS. In the figure, reference numeral 41 denotes a main body of an electric vacuum cleaner including a motor 42 and the like, which has a dust collecting chamber 43 in the front and a lid 44 which covers the upper side of the dust collecting chamber 43. Further, a concave portion 45 is formed on the upper portion of the lid body 44, and the dust collection amount display device 4
6 is attached. The dust collection amount display device 46 includes a transparent pointer cylinder 47, a green pointer A48 and a red pointer B4 that slide integrally in the pointer cylinder 47.
9, a communication pipe 50 that connects the dust collection chamber 43 and the pointer cylinder 47,
A pointer spring 51 which is disposed between the communication pipe 50 and the pointer A48 and biases the pointer A48 and the pointer B49 in the opposite direction to the communication pipe 50, and a pointer B which is sandwiched between the pointer cylinder 47 and the pointer cover 52.
It is constituted by a pointer valve 53 that hermetically shuts off the 49 side and the pointer lid 52 side.

A double-cylinder inner wall 54 is formed inside the pointer cylinder 47 on the side where the pointer cover 52 is attached. The position of the pointer B49 is regulated by the tip of the inner wall 54 on the side of the communicating pipe 50, and the pointer A48 is formed. The pointers B49 are coupled to each other by concave and convex fitting. The pointer B49 is composed of a substantially cylindrical outer peripheral wall 49 and an inner peripheral wall 55, a substantially cap-shaped pointer valve 53 covers the inner peripheral cylinder 55 with a thin film having rubber elasticity, and a pointer lid 52 has a substantially cylindrical shape. The circular indicator valve 53 is covered from the outer peripheral side. Also,
The center of the pointer lid 52 is open so as to communicate with the outside of the main body 41, and one end of the communication pipe 50 has a through hole 5 provided in the lower surface of the recess 45.
6 is in communication with the dust collecting chamber 43, atmospheric pressure acts on the pointer lid 52 side of the pointer valve 53 and vacuum pressure generated by the operation of the electric blower 42 acts on the pointer B49 side.

The pointer valve 53 is deformed by the inward suction force of the dust collecting chamber 43 and the spring biasing force of the pointer spring 51 due to the pressure difference acting on the inner wall 54 of the pointer cylinder 47. Then, the pointer B49 is displaced to the communication pipe 50 side.

Reference numeral 56 is a cover plate having a display window hole 57 above the pointer cylinder 47, which is fitted in the recess 45 so that the pointer A48 can be seen through the display window hole 57 when the electric blower 42 is not in operation. To do. Next, the operation and action of the above configuration will be described. When dust is accumulated in the paper bag 58 using the main body 41, the flow rate of air flowing into the electric blower 42 decreases, and the pressure in the dust collection chamber 43 gradually decreases below atmospheric pressure. Then, when the amount of accumulated dust increases and the vacuum pressure becomes lower than the predetermined pressure, the suction force that draws the pointer valve 53 toward the communication pipe 50 by the pressure difference from the atmospheric pressure that acts on the inner wall 54 of the pointer cylinder 47. Is larger than the spring biasing force of the pointer spring 51. At this time, the pointer valve 53 moves the inner peripheral wall 5 of the pointer B49.
The part that touches 5 is the communication pipe 50 between the inner peripheral wall 55 and the inner wall 54.
Side, the pointer A48 and the pointer B49 are slightly displaced toward the communicating pipe 50 side.

When the suction force increases as the accumulation of dust increases, the amount of reverse deformation of the pointer valve 53 gradually increases,
The pointer A48 and the pointer B49 are gradually moved to the communication pipe 50 side. At this time, the green pointer A48 is displayed through the display window hole 57.
And the red pointer B49 are visible at the same time. When the amount of dust exceeds a predetermined amount, the amount of displacement of the pointer A48 and the pointer B49 becomes maximum, and only the red pointer B49 can be seen through the display window hole 57, informing the user of the dust disposal time, and replacing the paper bag 58 with a new one. It will be replaced with a new one and will be reused with a strong suction force.

[0008]

With such a conventional structure, the dust collection amount display device 46 has an extremely large number of parts, which not only increases the material cost and the assembly cost, but also increases the communication pipe 50. There is a problem that the pointer cylinder 47, and the pointer cylinder 47 and the pointer valve 53 are inferior in airtightness and cause performance degradation.

SUMMARY OF THE INVENTION The first object of the present invention is to provide a dust collecting amount display device for an electric vacuum cleaner which is small in size, can reduce the number of parts, is low in cost, and can be installed in a small space. And

A second object of the present invention is to provide a dust collection amount display device for an electric vacuum cleaner that is more compact in the longitudinal direction.

A third object of the present invention is to provide a dust collecting amount display device of good versatility that can be applied to all vacuum cleaners having different performances.

[0012]

In order to achieve the above first object, the dust collecting amount display device for an electric vacuum cleaner according to the present invention has a first object.
The means is a bellows that expands and contracts due to the differential pressure between the vacuum pressure part and the atmospheric pressure part, a communication pipe that is formed integrally with the bellows and that communicates with the inside of the hollow of the bellows, and a pointer that is displaced in conjunction with the expansion and contraction of the bellows. And the connecting pipe is connected to the vacuum pressure part side, and the bellows is arranged on the atmospheric pressure part side.

Further, in order to achieve the second object, the second means is that the bellows are integrally provided and the communicating pipe is provided in the vertical direction, and the bent portion is formed at the base portion of the communicating pipe connected to the vacuum pressure side. Then, the bellows is expanded and contracted through the bent portion.

Further, in order to achieve the third object, the third means is to provide a flange at the end of the communication tube and the bellows on the side of the pointer, and a spring is provided between the flanges so that the pointer starts to be displaced under a predetermined vacuum pressure. A pointer spring for urging is provided.

In order to achieve the third object, the third
The means is to provide a flange at the end of the bellows side of the communication hole and the bellows,
A pointer spring for urging the pointer so that the pointer starts to be displaced under a predetermined vacuum pressure is provided between both flanges.

[0016]

According to the dust collecting amount display device for the electric vacuum cleaner of the present invention, when the suction force increases as the accumulation of dust increases, the bellows contracts and the pointer moves, and the dust amount varies depending on the structure of the first means. When the amount exceeds a certain amount, a pointer is displayed to inform the user of the dust disposal time. Since the communication pipe and the bellows are integrally formed, the size is reduced and the installation space can be reduced.

Further, by the constitution of the second means, it is possible to construct a dust collection amount display device which is further miniaturized in the longitudinal direction,
A main body of a small and lightweight electric vacuum cleaner can be configured.

Further, by the constitution of the third means, by setting the load of the pointer spring arbitrarily, it is possible to deal with all the electric vacuum cleaners having different performances and the versatility becomes good.

[0019]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIGS. In the figure, reference numeral 1 denotes a main body of an electric vacuum cleaner having a built-in electric blower 2 and a dust collection chamber 4 in which a paper bag 3 is mounted in the front thereof. 6 is formed and a dust collection amount display device 7 is attached.

The dust collection amount display device 7 is made of a soft material such as rubber and has a communication pipe 9 having a thin and expandable and contractible bellows 8 and a pipe line 11 on the opposite side to a pipe line 11 communicating with a space 10 of the bellows 8. A pointer A13 hooked and coupled to the T-shaped portion 12 provided on the closed end face, and a pointer B1 fitted and coupled by a protrusion B15 to a protrusion 14 provided on a part of the inner surface side of the pointer A13.
6 and 6.

Since one end of the communication pipe 9 is attached to a hole provided on the side surface of the recess 6 and communicates with the dust collection chamber 4, atmospheric pressure is present outside the bellows 8 and in the space 10 inside the bellows 8. The vacuum pressure generated by the operation of the electric blower acts.

The bellows 8 is deformed by receiving the suction force in the inward direction of the dust collecting chamber 4 due to the above-mentioned pressure difference acting on the internal space 10, and the pointers A13 and B16 are deformed toward the conduit 11 side of the communicating pipe 9. Let

Reference numeral 17 denotes a cover plate having a display window hole 18, which is fitted in the recess 6. When the electric blower 2 is not operating, the pointer A13 can be seen through the display window hole 18. Display window hole 1 during operation
The pointer A13 can be seen from 8.

Next, the operation and action of the above configuration will be described. When dust is accumulated in the paper bag 3 using the main body 1, the flow rate of the air flowing into the electric blower 2 is reduced, and the pressure in the dust collection chamber 4 is gradually lowered below the atmospheric pressure. When the amount of accumulated dust increases and the vacuum pressure becomes lower than a predetermined pressure, the suction force for attracting the bellows 8 toward the conduit 11 side is generated by the pressure difference between the vacuum pressure and the atmospheric pressure acting on the space 10 inside the bellows 8. Greater than the strength of. At this time, the corrugations on the outer periphery of the side surface of the bellows 8 start to shrink so as to come into close contact, and at the same time, the pointers A13 and B
16 is slightly displaced toward the communication pipe 9 side.

When the suction force increases as the accumulation of dust increases, the shrinkage of the corrugated shape on the outer periphery of the side surface of the bellows 8 gradually increases, and the pointers A13 and B16 are gradually moved to the communicating tube 9 side. At this time, the green pointer A13 and the red pointer B16 are simultaneously visible from the display window hole 18. When the amount of dust exceeds a predetermined amount, the amount of displacement of the pointer A13 and the pointer B16 becomes maximum, and only the red pointer B16 can be seen from the display window hole 18, the user is informed of the dust disposal time, and the paper bag 8 is renewed. It will be replaced with a new one and will be reused with a strong suction force.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIGS.

As shown in the figure, a communicating pipe 22 having a bellows 21 is provided in a direction perpendicular to the pointers A13 and B16, and a bent portion 24 formed thinly is formed at the base of the bellows 21 on the mounting portion 23 side. When the corrugated shape of the outer periphery of the bellows 21 begins to contract so as to be in close contact with the same action as that of the first embodiment, it is bent from the bent portion 24 formed at the base portion of the bellows 21 and is T-shaped. The pointers A13 and B16 are moved and displayed via the section 12.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to FIG.

As shown in the drawing, a flange A32 larger than the diameter of the bellows 31 is provided on the side of the pointer A13 of the bellows 31, and the communicating pipe 3
A flange B34 having a diameter larger than that of the bellows 31 is detachably provided on the third side, and a coiled pointer spring 35 having a diameter larger than that of the bellows 31 is engaged with an end portion of a groove 36 provided in the flange A32 and the flange B34. It is held, and the pointer spring 35
Since the degree of contraction of the bellows 31 is changed by arbitrarily setting the load of, the electric vacuum cleaner having different performances can be dealt with.

[0030]

As is apparent from the above embodiments, according to the present invention, the bellows and the communicating pipe are integrally formed, and the pointer is displaced by the expansion and contraction of the bellows to display the dust collection amount. The number of parts can be reduced and the installation space can be reduced. Further, by providing the communication pipe integrally formed with the bellows in the vertical direction, the size in the longitudinal direction can be made smaller, and the main body of the small and lightweight electric vacuum cleaner can be configured.

Further, by allowing the pointer spring to be attached, the load of the pointer spring can be set arbitrarily, and the vacuum cleaner having different performances can be accommodated.
It is possible to provide a dust collection amount display device for an electric vacuum cleaner that brings about effects such as improved versatility.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of an electric vacuum cleaner showing a state in which a dust collection amount display device according to a first embodiment of the present invention is mounted.

FIG. 2 is a cross-sectional view of the dust collection amount display device showing a state when dust is not accumulated in the paper bag.

FIG. 3 is a cross-sectional view of a dust collection amount display device showing a state where dust is accumulated in the paper bag.

FIG. 4 is a perspective view of a dust collection amount display device of the second embodiment.

FIG. 5 is a cross-sectional view of the dust collection amount display device showing a state when dust is not accumulated in the paper bag.

FIG. 6 is a cross-sectional view of a dust collection amount display device showing a state where dust is accumulated in the paper bag.

FIG. 7 is a sectional view of the dust collection amount display device of the third embodiment.

FIG. 8 is a sectional view of a dust collection amount display device showing a state in which a conventional dust collection display device is mounted.

FIG. 9 is a cross-sectional view of the dust collection amount display device showing a state when dust is not accumulated in the paper bag.

FIG. 10 is a sectional view of a dust collection amount display device showing a state where dust is accumulated in the paper bag.

[Explanation of symbols]

 4 Dust collection chamber (vacuum pressure part) 6 Recessed part (body pressure part) 8, 21, 31 Bellows 9, 22, 33 Communication pipe 11 Pipe line (cavity) 13 Pointer A 16 Pointer B 24 Bent portion 32, 34 Flange 35 Pointer Spring

Claims (3)

[Claims] 1. A bellows that expands and contracts due to a differential pressure between a vacuum pressure portion and an atmospheric pressure portion, a communication pipe that is formed integrally with the bellows and that communicates with the inside of the cavity of the bellows, and is displaced in association with the expansion and contraction of the bellows. With a pointer to connect the communication pipe to the vacuum pressure side,
A dust collection amount display device for an electric vacuum cleaner in which the bellows is arranged on the atmospheric pressure side. 2. A communication pipe integrally provided with a bellows is provided in a vertical direction, a bent portion is formed at a root portion of the communication pipe connected to the vacuum pressure side, and the bellows is expanded and contracted through the bent portion. The dust collection amount display device of the electric vacuum cleaner according to claim 1. 3. The electricity according to claim 1, wherein a flange is provided at the end of the communication hole and the bellows on the side of the pointer, and a pointer spring is provided between the flanges to bias the pointer so as to start displacing the pointer under a predetermined vacuum pressure. Vacuum cleaner dust collection amount display device.