JP3018489B2 - Dust collection amount display device for vacuum cleaner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collection amount display device of a mechanical vacuum cleaner that uses a negative pressure of a dust collection chamber used in a general household.

2. Description of the Related Art FIG. 4 shows a configuration of a conventional vacuum cleaner, and FIG. 5 shows a configuration of a conventionally used dust collection amount display device. As shown in FIG. 5, the dust collecting amount display device 21 includes a pointer 22 for indicating the degree of accumulation of dust and a pointer spring 23 for urging the same in a pointer cylinder 24, and a lid 26 having an opening 25 in the center. And a connecting pipe 28 for connecting to the main body dust collecting chamber 27. As shown in FIG. 4, the dust collecting amount display device 21 is attached to a dust collecting lid 29 constituting a
The state of the dust accumulation is notified by the position of the pointer 22 through the.

Next, the operation of such a dust collection display device will be described. When dust accumulates in the paper bag 32 attached to the main body dust collection chamber 27 and the inside of the main body dust collection chamber 27 becomes a negative pressure, the pressure in the dust collection amount display device 21 provided on the upper part also becomes a negative pressure. While the negative pressure is small, the pointer 22 is urged by the pointer spring 23, and the sealing surface 23 is in close contact with the lid 26 to maintain the nectarity. However, when the negative pressure further rises and the pressure in the dust collection amount display device 21 becomes lower than the atmospheric pressure, the urging force of the pointer spring 23 loses the negative pressure, the pointer 22 moves to the connection pipe 28 side, and the The air flows into the main body dust collection chamber 27. The inflow air cools the electric blower 34 to prevent burnout of the electric blower.

In such a conventional configuration, the dust collection amount display device 21 for judging the degree of accumulation of dust in the dust collection chamber 27 is a unit constituted by complicated mechanical components. However, the number of components is large and the cost is high.

An object of the present invention is to provide a dust collecting amount display device for a vacuum cleaner having a small number of parts, a simple structure, and a high dust collecting amount display accuracy. .

Means for Solving the Problems In order to solve this problem, the present invention provides a dust collecting amount display device, in which a thin film member having elasticity and having both sides colored in different colors is attached, Thus, the negative pressure in the dust collection chamber (the amount of dust in the paper bag) is displayed. The lid and the center of the thin film are connected by a spring so as to urge the thin film toward the lid attached to the pointer cylinder.

The thin film body is placed inside the dust collection amount display device in a nectar manner, so that the thin film body expands and contracts due to the negative pressure inside the dust collection amount display unit. The negative pressure can be indicated by the amount of extension of the thin film.

Also, different colors are applied to both surfaces of the thin film, and the center of the lid and the center of the thin film are connected by a spring. At this time, the color of the lid side of the thin film can be seen from the outer window of the vacuum cleaner. When the pressure inside the dust collection chamber becomes negative, the thin film is pulled toward the connecting pipe, and the color of the other surface of the thin film appears, and the change in color and the amount of elongation of the colored thin film indicate the amount of dust collection. .

Embodiment A dust collection amount display device according to an embodiment of the present invention will be described with reference to FIGS. As shown in the figure, the vacuum cleaner comprises a dust collecting chamber 2 and an electric blower 3 provided in a main body 1 of the vacuum cleaner, and is collected in an upper storage lid 4 in the dust collecting chamber 2 at the front of the main body 1. A dust amount display device 5 is provided, and a pressure state in the dust collection chamber 2 is displayed through a window hole 7 provided in a storage lid 6. The dust collection amount display device 5 is connected to an upper storage lid 4. A pointer cylinder 9 is held on the outer peripheral surface of the end of the pointer 8, and a thin film body 10 whose both surfaces are colored in different colors is held inside the pointer cylinder 9 so as to be perpendicular to the pointer cylinder 9. The thin film member 10 has elasticity and is vertically fixed to the center of the pointer cylinder 9 by a holding ring.

If dust accumulates in the paper bag 12 during cleaning, the pressure inside the dust collection chamber 4 becomes negative, the pressure inside the pointer cylinder 9 of the dust collection amount display device 5 also becomes negative, and the colored thin film body 10 extends toward the connecting cylinder 8. The amount of elongation of the thin film body 10 changes depending on the amount of negative pressure in the pointer cylinder 9 as shown by a dotted line in FIG. Since the thin film body 10 is colored, it can be easily identified from the outside and the amount of dust in the vacuum cleaner can be easily grasped.

The second embodiment of the present invention is, as shown in FIG. 3, a dust collection amount display device 13 having the same configuration as that of the first embodiment.
A thin film member 15 is vertically arranged in the center of the inside of 14 in a direction perpendicular to the pointer cylinder 14, and the center of the thin film member 15 is tied with a spring 17 from the center of the lid 16 attached to the end of the pointer cylinder 14. It is designed to bias to 16 side.

Here, when the inside of the dust collecting chamber 2 of the vacuum cleaner has a negative pressure, the thin film body 15 extends toward the dust collecting chamber against the spring 17. As the negative pressure in the dust collecting chamber 2 increases, the amount of extension of the thin film body 15 increases accordingly. Looking at this from outside the aircraft,
Initially, the color of the thin film body 13 on the side biased by the spring 17 was visible, but as the negative pressure increased, the color of the opposite surface of the thin film body 15 appeared outside the aircraft, and such a color change caused The amount of dust collection can be notified. As a result, the usable area of the vacuum cleaner can be determined by the color, and the exchange magnetism of the dust bag can be clearly determined.

Effect of the Invention As is clear from the description of the above embodiment, according to the present invention, by performing the dust collection amount display operation of the dust collection amount display device by the expansion and contraction of the thin film body, the number of parts is smaller than in the past. And the structure can be simplified. Further, conventionally, the pointer spring biasing the pointer greatly varies depending on manufacturing conditions. However, in the structure of the present invention, it is easy to produce a uniform elastic thin film body having no variation, so that the dispersion of the pointer operation is reduced. And the like.

[Brief description of the drawings]

FIG. 1 is a partially cutaway sectional view of a vacuum cleaner provided with a dust collection amount display device according to one embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the dust collection amount display device, and FIG. FIG. 4 is a longitudinal sectional view of a vacuum cleaner using the conventional dust collection amount display device, and FIG. It is a longitudinal sectional view 2 .... Dust collection chamber, 4 ... Top dust collection lid, 5,13 ... Dust collection amount display device, 6 ... Storage lid, 7 ... Window hole, 8 ... Connection pipe, 9 ,14
…… Pointer tube, 10,15 …… Thin film, 11 …… Retaining ring, 16
... lid, 17 ... spring.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-4-102426 (JP, A) JP-A-3-268726 (JP, A) JP-A-3-165725 (JP, A) 79583 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) A47L 9/19 G01L 7/02

Claims (2)

(57) [Claims] 1. A connecting pipe connected to a dust collecting chamber in a vacuum cleaner main body, a transparent pointer pipe connected to the connecting pipe and having one end open to the outside, and an inner surface of the pointer pipe perpendicular to the pointer pipe. A thin film made of an elastic material held in a nectar, wherein both sides of the thin film are colored in different colors, and the negative pressure in the dust collection chamber indicates the amount of dust collection by elongating the thin film. Dust collection amount display device. 2. A lid is provided at the end of the pointer cylinder opposite to the connecting pipe,
The inner central part of the lid and the central part of the thin film body are connected by a spring,
The dust collection display device for a vacuum cleaner according to claim 1, wherein the thin film body is urged toward the lid.