JP2010022445A - Dust collection filter and vacuum cleaner using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust collection filter which uses a metal mesh filter as a filter for separating dust and prevents dust catch by reducing barriers on the ventilation upstream side of a resin frame forming a frame of the metal mesh filter. <P>SOLUTION: The dust collection filter is provided with a resin frame 14 integrally molded on the ventilation downstream side of the metal mesh filter 13. In forming the resin frame 14, the resin goes through a through-hole 12 provided in the metal mesh filter 13 and grips a coupling metal mesh filter 13 with resin on the ventilation upstream side, so that the joint strength between the resin frame 14 and the metal mesh filter 13 is secured. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a dust collection filter attached to a vacuum cleaner body and a vacuum cleaner having the dust collection filter.

This type of conventional dust collection filter has a structure in which a metal mesh filter frame is formed using a resin part formed as a separate part, and the outer periphery of the metal mesh filter is sandwiched (for example, Patent Document 1). reference).
JP 2005-52394 A

  However, in the case where the metal mesh filter is sandwiched between resin parts as described above, there is a step between the filter surface and the frame, and in particular, metal is caught on the step portion provided on the upstream side of the ventilation. There was an assembly loss of inserting a resin frame into the mesh filter.

  The present invention solves the above-described conventional problems, and uses a metal mesh filter as a dust collection filter for separating dust, and also provides a step on the upstream side of the ventilation of the resin frame forming the frame of the metal mesh filter. By eliminating it, it is possible to prevent the trash from being caught and to improve the detachability and the productivity.

  In order to solve the above-described conventional problems, the dust collection filter of the present invention includes a metal mesh filter and a resin frame that holds the metal mesh filter, and the resin frame is integrated with the downstream side of the ventilation of the metal mesh filter. While molding, a part of the resin forming the resin frame is filled in a through-hole provided in the metal mesh filter to form a joint between the resin frame and the metal mesh filter, It is not necessary to form a protrusion of the resin frame on the upstream side of the ventilation, eliminating the stepped portion where the dust is caught, and improving the dust separation property.

  According to the dust collecting filter of the present invention, it is not necessary to form a protrusion of the resin frame on the upstream side of the ventilation, and the dust separation property can be improved.

  1st invention consists of a metal mesh filter and the resin frame which hold | maintains the said metal mesh filter, and while integrally molding the said resin frame to the ventilation | gas_flowing downstream of the said metal mesh filter, the resin which forms the said resin frame A part of the through hole provided in the metal mesh filter is filled to form a joint between the resin frame and the metal mesh filter, and the resin is passed through the through hole provided in the metal mesh filter. By making the cross-sectional shape to bite when it is done, the peel strength between the resin and the metal can be increased. Therefore, the metal mesh filter and the resin frame can be formed integrally, and productivity can be improved.

  According to the second invention, in particular, in the first invention, the peeling force applied in the vertical direction at the joint portion can be strengthened by opening the through-hole in the joint portion of the metal mesh filter obliquely.

  According to a third aspect of the invention, in particular, in the first aspect, the through hole in the joint portion of the metal mesh filter is formed into a curved shape by etching, thereby reducing the hole diameter of the inlet into which the resin flows and increasing the outlet side. Thus, the resin can bite into the metal mesh all around the through-hole, and the peeling force of the joint portion can be increased not only in the vertical direction but also in every direction.

  In the fourth invention, in particular, in the first invention, the through hole in the joint portion of the metal mesh filter is formed in a curved shape by etching processing, and the etching processing surface is arranged to be on the upstream side of the ventilation, The biting portion of the resin on the metal mesh can be formed within the width of the cross section of the metal mesh, and the surface of the metal mesh and the surface of the resin can be made coplanar.

  In a fifth aspect of the invention, in particular, in the first aspect of the invention, the through holes in the joint portion of the metal mesh filter are formed by etching from both sides of the metal filter, and the necessary hole diameter is made to penetrate through the intersecting portion of the etched portion. By forming it, a through part with a small hole diameter is formed in the cross section of the metal mesh filter, and the etching processing diameter (inlet processing diameter) for opening the through hole can be reduced compared to one-side etching, A large number of through holes per unit area can be opened. By opening a large number of through-holes, it is possible to densely form the joints and further increase the peel strength, and it is possible to make a shape that conforms to the shape of the resin frame.

  According to a sixth aspect of the invention, in particular, in the first aspect of the invention, by shifting the etching processing center from both sides, the through hole is opened obliquely, and the through hole is opened obliquely, thereby balancing the biting portion of the resin. It can be adjusted.

  A seventh invention is an electric vacuum cleaner comprising the dust collecting filter according to any one of claims 1 to 6, wherein the dust collecting filter is integrally formed with a metal mesh filter and a resin frame, and a metal By using the same surface so that the resin frame does not protrude from the surface of the mesh filter, it is possible to eliminate dust trapping on the dust collection filter during dust separation and waste disposal, and to reduce assembly man-hours. Can do.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
The vacuum cleaner in the 1st Embodiment of this invention is demonstrated using FIGS.

  FIG. 1 is a central sectional view of the main body of the vacuum cleaner in the present embodiment. 2 is a central cross-sectional view of a dust box used in the vacuum cleaner, FIG. 3 is a perspective view of a dust collecting filter which is a feature of the present invention, and FIG. 4 is a partial cross-sectional view (cross-sectional shape of a joint). It is.

  1 and 2, reference numeral 1 denotes an electric vacuum cleaner main body (hereinafter referred to as a main body 1), and a traveling wheel 2 is provided at a lower portion of the main body 1. A power cord 3 is arranged at the upper stage of the traveling wheel 2, and an intake port 4 for connecting a hose (not shown) is connected to the upper part of the power cord 3 (upper part of the main body) and dust is sucked to the rear. An electric blower 5 is disposed, and a dust box 6 for accommodating dust is disposed between the air inlet 4 and the electric blower 5. The dust box 6 is detachable from the main body 1. The structure of the dust box 6 includes an introduction port 7 for swirling dust at the upper stage, a dust collection filter 8 for separating dust at the middle stage, and a dust collection chamber 9 for accommodating the separated dust at the lower stage. The sucked dust is carried to the inlet 7 at the top of the dust box 6 and is introduced into the dust box together with the swirling airflow. The dust that has been introduced is separated into fine dust and suction air by the dust collecting filter 8, and is carried to the dust collecting chamber 9. Fine dust is collected by a secondary filter 10 provided on the outer periphery of the dust collection filter 8. The dust stored in the dust collection chamber 9 is discharged by removing the dust box 6 from the main body 1 and opening the bottom lid 11 of the dust box 6 and can be used repeatedly. Next, the structure of the dust collection filter 8 which is the characteristic of this invention is demonstrated using FIGS.

  As shown in FIG. 3, the dust collection filter 8 is composed of a resin frame 14 integrally formed with a cylindrical metal mesh filter 13. The metal mesh filter 13 is a stainless steel plate having a thickness of about 0.15 mm with holes for ensuring air permeability. After being cut into a rectangle or fan shape, the metal mesh filter 13 is rolled into a cylindrical shape and aligned at both ends. In this state, the dust collecting filter 8 is formed by integrally molding the resin frame 14. At the time of this integral molding, the resin frame 14 is formed on the mating portion 13 ′ of the metal mesh filter 13 and the upper and lower ends (circular portions) to maintain the cylindrical shape after molding. At this time, since the metal mesh filter 13 and the resin 14 cannot be joined even if the resin flows adjacent to the metal mesh filter 13, a through hole 12 is formed in the joint 8 a, and the resin is injected into the through hole 12 when the resin frame 14 is molded. It is joined by flowing. In the present embodiment, the resin frame 14 to be integrally molded is provided on the downstream side of the ventilation of the metal mesh filter 13 so that the resin flows into the upstream surface of the metal mesh filter 13 through the through hole 12 during the integral molding. By doing so, the resin frame 14 is prevented from projecting to the upstream surface of the metal mesh filter 13.

  Furthermore, the cross-sectional shape of the through hole 12 of the metal mesh filter 13 which is the point of the present invention will be described with reference to FIG.

  4 (a) is a plan view of the metal mesh filter 13, FIG. 4 (b) is a cross-sectional view of the through hole (BB cross section of (a)), and FIG. 4 (c) is a resin frame integrally molded. Sectional drawing (AA cross section of FIG. 3) of the through-hole part at the time is shown. Here, the through hole provided in the joint portion 8a of the metal mesh filter 13 is inclined with respect to the surface, and when the resin frame 14 is integrally formed, the resin flows into the through hole 12, The metal mesh filter 13 can be eaten and firmly joined.

(Embodiment 2)
FIG. 5 shows the through hole in the second embodiment, and the other configuration is the same as that of the first embodiment, and the description thereof is omitted.

  5 (a) is a plan view of the metal mesh filter 13a, FIG. 5 (b) is a cross-sectional view of the through hole (BB cross section of (a)), and FIG. 5 (c) is a resin frame integrally molded. Sectional drawing (equivalent to the AA cross section of FIG. 3) of the through-hole part at the time is shown. Here, the through-hole 12a provided in the joint portion 8a of the metal mesh filter 13a has a through-hole formed in a curved shape like a bowl by etching processing from one side, and the etching processing surface is the upstream side of ventilation. Thus, the entrance on the downstream side of the ventilation is narrow and the upstream side is wide. When the resin frame 14a is integrally formed, the resin flows into the through hole 12a, so that the metal mesh filter 13a can be eaten and firmly bonded.

  The shape of the through-hole is not limited to this shape, and the shape of the through-hole is basically narrow at the inlet on the downstream side of the ventilation and widened at the upstream side.

(Embodiment 3)
FIG. 6 shows the through hole in the third embodiment, and the other configurations are the same as those in the first embodiment, and the description thereof is omitted.

  6 (a) is a plan view of the metal mesh filter 13b, FIG. 6 (b) is a cross-sectional view of the through hole (BB cross section of (a)), and FIG. 6 (c) is a resin frame integrally molded. Sectional drawing (equivalent to the AA cross section of FIG. 3) of the through-hole part at the time is shown. Here, the through-hole 12b provided in the joining part 8a of the metal mesh filter 13b has a through-hole formed in a curved shape like two bowls facing each other by etching from both sides. In particular, in this embodiment, the through hole 12b is formed obliquely by shifting the center of the etching process. When the resin frame 14b is integrally formed, the resin flows into the through hole 12b, so that the metal mesh filter 13b can be eaten and firmly bonded.

  There are various methods for forming the through-hole, but the one having the through-hole formed obliquely by press working has a low processing cost, but the peel strength is not so strong. In order to open a curved hole from one side by etching, a diameter sufficient to reduce the depth of the plate thickness is required, the pitch of the through holes is increased, and the number of through holes per unit area is reduced. However, the through hole can be formed into a reverse bowl shape, and the peel strength is significantly increased. In addition, the number of through holes per unit area, which is a problem of single-sided etching, can be increased by opening the through-holes by double-sided etching. In this case, the peel strength is increased, and the penetrating portion becomes dense so that a cylindrical shape can be firmly obtained.

  In the case of etching, a wedge shape can be created within the cross-sectional shape of the stainless steel plate, so that the stainless steel plate is firmly joined to the resin frame without causing the biting resin to protrude beyond the surface of the stainless steel plate. In addition, it is possible to flatten the upstream side of the ventilation for separating the dust and to suppress the catching of the dust.

  As described above, the dust collection filter of the vacuum cleaner according to the present invention can suppress the catching of dust on the dust collection filter by eliminating the step on the surface, and integrally molds the metal mesh filter and the resin frame. Thus, productivity can be improved, and it is useful as a household or business vacuum cleaner having a dust collecting filter.

Central sectional view of the vacuum cleaner body in the first embodiment of the present invention. Central sectional view of the dust box of the vacuum cleaner Perspective view of the dust collection filter of the dust box (A) Partial plan view of the metal mesh filter of the embodiment (b) Partial sectional view of the through hole of the embodiment (c) Partial sectional view of the dust collection filter of the embodiment (A) Partial plan view of the metal mesh filter of the second embodiment of the present invention (b) Partial sectional view of the through hole of the same embodiment (c) Partial sectional view of the dust collection filter of the same embodiment (A) Partial plan view of the metal mesh filter of Embodiment 3 of the present invention (b) Partial sectional view of the through hole of the same embodiment (c) Partial sectional view of the dust collection filter of the same embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric vacuum cleaner body 6 Dust box 8 Dust collection filter 8a Joint part 12, 12a, 12b Through-hole 13, 13a, 13b Metal mesh filter 14, 14a, 14b Resin frame

Claims (7)

The metal mesh filter and a resin frame that holds the metal mesh filter, the resin frame is integrally formed on the downstream side of the ventilation of the metal mesh filter, and a part of the resin that forms the resin frame is the metal mesh A dust collection filter configured to fill a through hole provided in a filter to form a joint between the resin frame and the metal mesh filter. The dust collection filter according to claim 1, wherein the through hole in the joint portion of the metal mesh filter is opened obliquely. The dust collection filter according to claim 1, wherein the through hole in the joint portion of the metal mesh filter is formed into a curved shape by etching. 4. The dust collecting filter according to claim 3, wherein the through hole in the joint portion of the metal mesh filter is formed in a curved shape by etching processing, and the etching processing surface is disposed on the ventilation upstream side. The dust collection filter according to claim 1, wherein the through holes in the joint portion of the metal mesh filter are formed by etching from both sides of the metal filter, and the necessary hole diameter is formed by penetrating through the intersecting portion of the etched portion. The dust collection filter according to claim 5, wherein the through hole is opened obliquely by shifting the etching processing center from both sides. A vacuum cleaner comprising the dust collection filter according to claim 1.

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