JPS5820216Y2 - vacuum cleaner filter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vacuum cleaner filter in which a filter medium and a frame made of synthetic resin that retains its shape are integrally molded.

Conventional vacuum cleaner filters include a filter medium that is bent in a wave shape in the circumferential direction and has folded lines arranged in a radial manner;
Some of the above-mentioned filter media are equipped with an inner frame and an outer frame made of synthetic resin that are integrally molded at the outer end.

The means for forming the filter medium into the above-mentioned shape was to first bend the rectangular filter medium into a wave shape, and then to form it into a circular shape.

However, with the above method, when it is made into a circular shape, the inside.

Due to the difference in the outer circumference length, the slope of the waveform on the outer circumference side is larger than the slope on the inner circumference side, and this difference in slope causes the main surface of the filter medium to become curved.

Since the main surface of the filter medium is curved, the mold for integrally molding the frame must also have a curved corresponding surface, which reduces the complexity of the interrogation type structure. It was an invitation.

In addition, if the main surfaces of the filter media are curved as described above, the distance between the corresponding main surfaces becomes narrower, which increases the ventilation resistance in that part and concentrates the ventilation in other parts, making it difficult to use a wide stagnation filter. space could not be used effectively.

The present invention eliminates these conventional drawbacks, and allows a filter to be formed with a simple mold configuration.

That is, the present invention is bent into an angular wave shape in the circumferential direction,
It also comprises a filter medium in which trapezoidal substantially planar parts constituting the tops of mountains and the bottoms of valleys are arranged radially, and an inner frame and an outer frame made of synthetic resin that are integrally molded on the inner and outer ends of the filter medium. , the slope of the peaks and valleys of the filter medium are set to be the same at the inner and outer circumferential parts, and the main surface of the filter medium is shaped into a flat shape, so that a rectangular filter medium can be used as the filter medium before bending. At the same time, the main surface after being bent is flat.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 is the main body of a vacuum cleaner with a built-in electric blower 2, 3 is a dust collection box that is detachably attached to the bottom of the main body 1 and has rollers 4 and casters 5 on the bottom, and 6 is the same dust collection box. The support body is removably attached to the opening of 3, and an air tight packing 7 is attached to the outer periphery.

Reference numeral 8 denotes a filter in which an inner frame 10 and an outer frame 11 are integrally formed on a filter medium 9, and is fixed to a rotary handle 12 which is pivotally supported by a bearing portion 6a of the support body 6 through screws 13.

Reference numeral 14 denotes a circular plate which is fixed to the outer frame 11 of the filter 8 and has a rotating sealing gasket 15 attached to its inner circumference. Maintains airtightness inside and outside.

A diaphragm 16 is inserted into each valley of the filter 8, and is repelled by a spring body 17 attached to the bearing 6a of the support plate 6 to vibrate the filter 8 and remove dust.

Furthermore, the configuration of the filter 8 will be explained in detail.

The filter medium 9 has a circular shape as a whole, and is bent into an angular wave shape in the circumferential direction, and trapezoidal substantially planar portions forming the peaks 9C and the bottoms 9d of the valleys are arranged radially. .

Further, an outer frame 11 and an inner frame 10 are integrally provided to be joined to the outer edge 9a of the filter medium 9 and to the inner edge 9b, respectively, thereby maintaining the outer shape of the filter 8.

In the configuration of the filter medium 9, the waveform in the circumferential direction has a substantially trapezoidal planar shape with the tops 9C of the crests and the bottoms 9d of the valleys, so the inclinations of the outer edge 9a and the inner edge 9b are as shown in FIG. are the same.

Therefore, the main surface 9e of the filter medium 9 is set to be planar.

Now, to give an example of how to make filter 8, first,
A rectangular filter medium 9 made of non-woven fabric or filter paper is bent into a square wave shape and set between upper and lower molds to form a circular shape.Synthetic resin is then poured into the molds to form inner and outer frames 10.
11 are all commandments.

As explained above, in the present invention, the main surface of the filter medium is flat instead of curved as in the conventional case, so the surface of the mold corresponding to the main surface can also be flat. By simplifying the structure of the mold, it is possible to reduce the processing cost and, by extension, the production cost of the filter.

In addition, the distribution of fluid passing through the main surface of the filter medium is improved, so
It is also possible to improve the filtration characteristics.

In addition, since the filter material can be rectangular in the same way as before before being bent, there is no waste in material, further reducing costs. It also becomes possible to continuously and automatically perform curve processing.

[Brief explanation of the drawing]

Fig. 1 is a side view of a main part of a vacuum cleaner adopting the present invention, Fig. 2 is a perspective view of the filter, Fig. 3 is an explanatory diagram showing the end configuration of the filter medium, and Fig. 4 is It is an enlarged perspective view of the main part of the same filter. 8...Filter, 9...Filtering material, 9a
...Outer end, 9b...Inner end, 9C.
...The top of the mountain, 9d...The bottom of the valley, 9e
...Main surface, 10...Inner frame, 11...
...outer frame.

Claims (1)

[Scope of utility model registration request] A filter material that is bent into a rectangular waveform in the circumferential direction and has trapezoidal substantially planar parts forming the tops of mountains and the bottoms of valleys arranged radially, and a composite molded integrally with the inner and outer ends of the filter material. A filter for a vacuum cleaner, comprising an inner frame and an outer frame made of resin, and the slopes of the peaks and valleys of the filter medium are set to be the same at the inner and outer peripheral portions, and the main surface of the filter medium is formed into a flat shape.