JP5640771B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner provided with a dust collection paper pack, and more particularly to prevention of adsorption to an upper cover of a dust collection paper pack.

Conventionally, a paper pack, which is a dust collection bag, is provided in the dust collection chamber of the main body of the vacuum cleaner, and a rib is erected on the back surface of the top cover to prevent the paper pack from adsorbing to the upper cover of the dust collection chamber. (For example, refer to Patent Document 1).
In recent years, in order to improve the design, no ribs or the like are provided on the back surface of the upper lid, and the shape is the same as that of the upper lid surface which is the design surface.

Japanese Patent No. 3997600 (FIGS. 3 and 14)

  As shown in FIG. 8, in the conventional vacuum cleaner, when the dust bag of the paper pack is filled with dust, the dust bag expands and the paper pack is provided by the rib provided on the back surface of the upper cover of the dust chamber. There was a problem of breaking. In other words, when there are parts with different thicknesses, such as ribs, on the upper lid that is usually made of plastic, to avoid the occurrence of sink marks on the upper lid design surface due to the shrinkage of the plastic accompanying cooling during processing with the mold. This is because the tip of the rib has an edge shape of 1 mm or less due to the restriction of die cutting.

  Moreover, the freedom degree of secondary processes, such as decoration, fell remarkably and there also existed a subject that designability was impaired.

  Therefore, some recent vacuum cleaners have the same shape as the upper lid surface, which is the design surface, without providing ribs or the like on the back surface of the upper lid in order to improve the design. However, when the inside of the dust bag of the paper pack is filled with dust, the dust bag expands and comes into close contact with the back surface of the upper lid, so that there is a problem that the suction path cannot be secured and the suction performance is significantly reduced.

The present invention has been made to solve such problems, and a first object is to suppress a reduction in suction performance even when the dust bag of the paper pack is filled with dust. Is to provide a simple vacuum cleaner.
Moreover, the 2nd objective is to provide the vacuum cleaner which can raise the designability of the upper cover used as the key of the design of a vacuum cleaner main body, and the freedom degree of a process.

An electric vacuum cleaner according to the present invention includes an electric blower, a dust collection chamber that has a hose connection port and accommodates a paper pack made of a dust collection bag and a mount, and an upper lid that freely opens and closes the upper opening of the dust collection chamber. A part of the surface constituting the upper lid is undulated to make the upper lid uneven, and a recess on the back surface of the upper lid formed by the uneven shape is a part of the air path from the hose connection port side to the electric blower side. The part is formed.

  According to the present invention, even when the dust collection bag is filled with dust, the concave portion on the back surface of the upper lid forms a part of the air path, so that a reduction in suction performance can be suppressed.

It is an external appearance perspective view of the vacuum cleaner which concerns on Embodiment 1 of this invention. It is an external appearance perspective view of the vacuum cleaner main body of the vacuum cleaner which concerns on Embodiment 1 of this invention. It is the external appearance perspective view which opened the vacuum cleaner main body of the vacuum cleaner which concerns on Embodiment 1 of this invention. It is a center sectional view of the vacuum cleaner main part of the electric vacuum cleaner concerning Embodiment 1 of the present invention. It is a top view of the vacuum cleaner main body of the electric vacuum cleaner which concerns on Embodiment 1 of this invention. It is a sectional side view of the vacuum cleaner main body of the vacuum cleaner which concerns on Embodiment 1, 2 of this invention. It is a figure which shows the flow of the air before the inside of the dust bag of the paper pack of the vacuum cleaner which concerns on Embodiment 1 of this invention becomes full. It is a figure explaining the attachment part of the vacuum cleaner which concerns on Embodiment 3 of this invention. It is a figure explaining the manufacturing method of the attaching part of the vacuum cleaner which concerns on Embodiment 3 of this invention. It is a figure explaining the manufacturing method of the attaching part of the vacuum cleaner which concerns on Embodiment 3 of this invention. It is a figure which shows the structure of the conventional vacuum cleaner main body.

Embodiment 1.
FIG. 1 is an external perspective view showing a vacuum cleaner according to Embodiment 1 of the present invention. FIG. 2 is an external perspective view of the vacuum cleaner main body of the electric vacuum cleaner according to Embodiment 1 of the present invention. FIG. 3 is an external perspective view showing a configuration in which the upper cover of the vacuum cleaner body of the electric vacuum cleaner according to Embodiment 1 of the present invention is opened. FIG. 4 is a central sectional view of the cleaner body 5 of the electric vacuum cleaner according to the present invention. FIG. 5 is a top view of the vacuum cleaner main body 5 of the electric vacuum cleaner according to the present invention in a state in which another part for decoration is removed.

  As illustrated in FIG. 1, the vacuum cleaner 100 includes a suction tool 1, a suction pipe 2, a connection pipe 3, a hose 4, and a cleaner body 5.

  The suction tool 1 sucks in dust and air containing dust on the floor. One end of a straight cylindrical suction pipe 2 is connected to the outlet side of the suction tool 1. The other end of the suction pipe 2 is provided with a handle provided with an operation switch 2 a for controlling the operation of the vacuum cleaner 100, and one end of the connection pipe 3 is connected thereto. One end of a flexible bellows-like hose 4 is connected to the other end of the connection pipe 3. Furthermore, the vacuum cleaner main body 5 is connected to the other end of the hose 4.

  The vacuum cleaner main body 5 is compatible with both a paper pack type and a cyclone type, and is connected to an external power source through a power cord (not shown) and performs a dust collecting operation when energized by the operation switch 2a. The suction tool 1, the suction pipe 2, the connection pipe 3, and the hose 4 constitute a part of a flow path for allowing dust-containing air to flow from the outside to the inside of the cleaner body 5.

Next, the structure of the cleaner body 5 will be described with reference to FIGS.
As shown in FIGS. 2 to 5, the vacuum cleaner main body 5 of the electric vacuum cleaner 100 is attached to an upper lid 51, another part 52 for decoration, a lower case 53, and a lower case 53. 5 to be able to carry 5 by hand, one front wheel 55 attached to the lower case 53, and two rear wheels that are larger in diameter than the front wheel and support the lower case 53 so as to be able to rotate and move. And a ring 56.

Next, the internal configuration of the lower case 53 will be described.
In FIG. 4, the left side is referred to as the front (upstream side), and the right side is referred to as the rear (downstream side). A dust collection chamber 531 is provided in front of the lower case 53, and an electric blower 532 serving as a suction power unit is provided in the rear. Further, a separator 533 is provided between the dust collection chamber 531 and the electric blower 532, and a filter for capturing fine dust is installed here. Further, a hose connection port 534H that is an opening communicating with the hose 4 is formed in front of the lower case 53 so as to communicate with the dust collecting chamber 531. The hose connection port is a seal made of an elastic member such as rubber. Covered with packing 534.

  By energizing the electric blower 532, outside air containing dust is sucked into the dust collection bag 62 provided in the dust collection chamber 531 through the suction tool 1, the connection pipe 3, and the hose 4. In addition, the cleaner body 5 is provided with a control board 535, a display unit (not shown), a cord reel unit 536, an exhaust port (not shown), and the like.

  The upper lid 51 has an uneven shape in the left-right direction, and the concave portion 7H on the back surface of the upper lid 51 extends substantially linearly from the hose connection port 534H side to the electric blower 532 side, that is, from the front to the rear. And this uneven | corrugated shape is formed in the approximate center part of the upper cover 51. FIG.

  Next, the flow of the suction air generated by the electric blower 532 will be described. 7 shows the flow of air before the dust bag 62 of the paper pack 6 is full. FIG. 4 shows the flow of air when the dust bag 62 of the paper pack 6 is filled with dust. .

  When the vacuum cleaner 100 is operated, dust-containing air from the outside passes through the suction tool 1, the suction pipe 2, the connection pipe 3, and the hose 4 by the suction force of the electric blower 532, and the hose connection with the seal packing 534 is performed. It flows into the dust bag 62 of the paper pack 6 through the opening 534H and the hole of the paper pack mount 61. The air flow in which dust is trapped by the dust bag 62 is divided into two main air passages A (see FIG. 7) and bypass air passage B (see FIG. 4). A recess 7H (see FIG. 6) on the back surface of the upper lid 51 forms a part of the bypass air passage B. The air flowing through the main air passage A passes through the rear separator 533 to remove fine dust, and then passes through the electric blower 532 and is discharged to the outside through the exhaust port.

  On the other hand, as shown in FIG. 4, the air flowing through the bypass air passage B enters the dust bag 62 via the hose connection port 534H, and is recessed from the upper part of the dust bag 62 on the back surface of the upper lid 51 that is uneven. 7H (see FIG. 6), passes through the separator 533 and the electric blower 532 from the rear end of the recess 7H, and is discharged to the outside through an exhaust port (not shown). Here, the cross-sectional shape orthogonal to the wind flow of the recess 7H is substantially the same shape over the recess 7H extending in the front-rear direction.

  When the operation of the vacuum cleaner 100 is continued in a state where the dust collection bag 62 of the paper pack 6 is filled with dust, the dust is accumulated and compressed sequentially from the downstream side of the main air passage A of the dust collection bag 62. . Then, dust accumulates from the side facing the mount 61 in the dust collection bag 62 and further accumulates in the lower part of the dust collection chamber 531 due to gravity.

  If the bypass air passage B is not secured, the dust bag 62 will eventually fill up with dust, filling the downstream side and bottom of the dust collection chamber 531, and reaching the top of the dust collection chamber 531 (upper lid 51). The upper lid 51 comes into close contact. When this happens, the flow path of the main air path A becomes clogged, and the air path gradually becomes narrower, so that the pressure loss increases and the suction performance rapidly decreases. And although the front part in the dust collection bag 62 still has the capacity of accommodating dust, it eventually becomes almost unflowable and cannot be sucked. As a result, there arises a problem that suction cannot be performed even though a large amount of power is consumed. In addition, since air for cooling the electric blower 532 cannot be secured, if the operation is continued for a long time, the heat generated by the electric blower 532 is accumulated, and the electric blower 532 may be burned out.

Therefore, the above problem can be solved by configuring the bypass air passage B with the uneven shape provided on the back surface of the upper lid 51.
When the dust collection bag 62 becomes full, the dust collection bag 62 eventually fills the downstream side and the bottom of the main flow in the dust collection chamber 531 and tries to reach the upper portion (upper lid 51) of the dust collection chamber 531. The entire upper surface of the dust bag 62 is not in close contact with the lower surface of the upper lid 51 due to the concave portion 7H on the back surface. At this time, since the main air passage A is blocked, the air flow passage flows through the bypass air passage B as shown in FIG. That is, the dust bag 62 is not clogged yet and enters the upstream having the capacity, and then rises upward from the dust bag 62 to exit the dust bag 62 and flows into the recess 7H on the back surface of the upper lid 51. After exiting from the recess 7H, it descends, passes through the separator 533 and the electric blower 532, and is discharged to the outside through an exhaust port (not shown).

  That is, even when the dust bag 62 is inflated, the portion where the dust bag 62 contacts the back surface of the upper lid 51 is generally only the convex portion of the concave and convex shapes on the back surface of the upper lid 51, and the dust collecting bag is compared with the case where there is no concave and convex shape. The area where the bag 62 is in close contact with the back surface of the upper lid 51 can be reduced. Therefore, an area through which air passes from the inside to the outside of the dust bag 62 can be secured, and the pressure loss in the dust bag 62 can be reduced.

  Further, the portion where the dust bag 62 is not in close contact with the upper lid 51 faces the concave portion 7H in the concave and convex shape on the back surface of the upper lid 51, and this concave portion 7H is an air passage (bypass air passage) extending from the hose connection port 534H to the electric blower 532 side. Since part of B) is formed, there is little air path resistance and the pressure loss in the bypass air path B can be reduced.

  In FIG. 6, it is desirable that the dimension “b” for forming the uneven shape on the back surface of the upper lid 51 (the farthest distance between the back surface of the upper lid and the vertex distance of the convex portion) is 10 mm or more. This depends on the material of the dust bag of the paper pack, but if the dimension b is small, even if the concave / convex shape is formed for the bypass air passage, it will adhere to the entire concave / convex shape when the paper pack is full. is there.

  Moreover, since the recessed part 7H of the back surface of the upper cover 51 is comprised so that it may extend substantially linearly from the hose connection port 534H side to the electric blower 532 side, wind path resistance is further suppressed.

  Furthermore, since the cross-sectional shape orthogonal to the air path of the recess 7H on the back surface of the upper lid 51 is made substantially the same, the air path resistance is further suppressed.

As described above, in the vacuum cleaner according to the first embodiment, even if the dust collection bag is filled with dust and the main air passage is blocked, a bypass air passage can be secured, thereby suppressing a reduction in suction performance of the vacuum cleaner. it can.
Moreover, since the air path of the air which cools an electric blower can also be ensured, generation | occurrence | production of the burning of an electric blower can be suppressed.

Moreover, since the shape of an upper cover is uneven | corrugated shape, intensity | strength can be increased compared with the case where there is no uneven shape. As a result, even if a load is applied to the top cover due to the difference between the negative pressure inside the top cover during cleaning and the atmospheric pressure outside the top cover, deformation of the top cover is suppressed and a highly reliable vacuum cleaner is provided. it can.
In particular, since the substantially central portion of the upper lid has an uneven shape, when a load is applied to the upper lid, the strength of the substantially central portion where the stress concentrates increases, and the deformation of the upper lid can be efficiently suppressed.

  In addition, even if a plurality of ribs are erected on the back surface of the upper lid as in the prior art shown in FIG. Although it can be ensured, there is a problem that the dust collection bag is easily damaged when the thin rib pushes the dust collection bag. However, in the concavo-convex shape of the present invention, the area of the convex portion that hits the dust bag can be increased. In Embodiment 1, the width dimension of the convex part which hits a dust bag is about 10 mm. That is, since the size of the convex portion in the left-right direction and the front-rear direction can be increased, even if the dust bag of the paper pack is pressed against the back surface of the upper lid with a high pressure, the stress concentration on the dust bag is alleviated and is not easily damaged. In particular, if the edge of the convex portion that contacts the dust bag is formed smoothly, the damage prevention effect of the dust bag is enhanced.

Embodiment 2. FIG.
The vacuum cleaner which concerns on Embodiment 2 of this invention provides another part for decoration on the design surface of the upper cover of a cleaner body. Other configurations are the same as those of the first embodiment.

In FIG. 6, in order to decorate the design surface of the upper cover 51 of the cleaner body 5, another decorative part 52 for covering the uneven shape of the upper cover 51 from the front side is provided. A plurality of pairs of attachment portions 51 a for attaching the decorative separate parts 52 are provided on both end faces of the recess 8 </ b> H on the front side of the upper lid 51. The attachment portion 51a is a claw portion 51b that protrudes from the surface of the upper lid 51, and the separate decorative part 52 is provided with a locking hole 52a that is locked to the claw portion 51b. Instead of the claw portion 51b, a concave portion that does not penetrate the upper lid 51 may be used, and the claw portion may be provided in the decorative separate component 52. In any case, since the attachment portion 51a of the upper lid 51 does not penetrate the upper lid 51, external air does not enter from the upper lid 51 due to the negative pressure in the dust collecting chamber 531, and the suction performance does not deteriorate.

As described above, in the vacuum cleaner according to the second embodiment, the shape of the separate part for decoration on the upper lid is made to have a shape with no irregularities on the back surface in particular, so that the receiving part of the decoration jig becomes uneven. The design value and the degree of freedom of decorative design (painting, hot stamping, silk printing, etc.) are increased, and the product value can be increased. Also, mass production yield is good.
In addition, since it is a separate part for decoration, the combination with the upper lid (for example, paint, kneading material, transparent material, etc.) can be freely selected, and the electric cleaning with high designability and high degree of freedom of decoration design Can provide a machine.

  In addition, the attachment part for attaching another decorative part to the upper lid is provided on both end faces of the concave part on the front side of the upper lid, and the attachment part is formed by a claw part protruding from the upper lid surface or a concave part that does not penetrate the upper lid. Since no hole is opened in the upper lid, there is no air leakage in the upper lid, and the suction performance of the vacuum cleaner does not deteriorate.

Embodiment 3 FIG.
A method for forming the mounting portion 51a in the second embodiment on the upper lid 51 will be described with reference to FIGS.
As shown in FIG. 9, the claw portion 51b of the upper lid 51 is formed using a slide mold 57a and an auxiliary mold 57b. Actually, a mold (not shown) is disposed in the space below the upper lid 51, and a space (gap) for forming the upper lid 51 is formed by the lower mold, the slide mold 57a, and the auxiliary mold 57b. The upper lid 51 having the claw portions 51b is manufactured by pouring resin into this space.

Next, as shown in FIG. 10, the auxiliary mold 57b is pulled upward, the slide mold 57a is slid leftward by c, and is released from the claw portion 51b. Then, the slide mold 57a is pulled upward, and the upper lid 51 is formed. Thus, the width dimension of the concave portion on the front side of the upper lid 51 is larger than the slide width c for forming the attachment portion 51a with the slide mold 57a.
In addition, although the nail | claw part 51b which protrudes from the upper cover 51 surface was formed by the slide metal mold | die 57a , the recessed part hollow in the upper cover 51 side can also be formed instead of the nail | claw part 51b.

  If the slide mold 57a is not used, for example, a hole for removing a mold for forming the claw portion 51b is formed in the upper lid 51 below the claw portion 51b. The width dimension a of both end recesses on the surface of the upper lid 51 is made larger than the slide width c (see FIG. 10) of the mold for forming the mounting portion 51a with a slide mold. Accordingly, the attachment portion 51 a can be formed in the upper lid 51 without opening a through hole in the upper lid 51.

  Furthermore, since the width of the concave portion 8H at both ends of the upper lid 51 surface is substantially the same across the concave portion 8H, the mold slide need not be divided, so that the strength of the slide mold can be increased.

  Thus, in the vacuum cleaner according to Embodiment 3, the width dimension of the concave portion on the front side of the upper lid where the upper lid is provided with the attachment portion for attaching the decorative part to the upper lid is the slide mold. Since it is larger than the slide width for forming, the mounting portion can be formed by a slide mold, so that no hole is opened in the upper lid, no air leaks in the upper lid, and the suction performance of the cleaner does not deteriorate.

  Further, since the width dimension of the concave portion on the front side of the upper lid provided with the mounting portion is made substantially the same across the concave portion on the front side of the upper lid, the strength of the slide mold can be increased, and the manufacturing of the mounting portion is facilitated.

  DESCRIPTION OF SYMBOLS 1 Suction tool, 2 Suction pipe, 2a switch, 3 Connection pipe, 4 Hose, 5 Vacuum cleaner main body, 6 Paper pack, 7H Concave part of upper cover back surface, 8H Concave part of upper cover surface, 51 Upper cover, 51a Mounting part, 51b Claw part, 52 Separate parts for decoration, 52a Locking hole, 53 Lower case, 54 Handle, 55 Front wheel, 56 Rear wheel, 57a Slide mold, 57b Auxiliary mold, 61 Mount, 62 Dust collection bag, 100 Vacuum cleaner, 531 Dust collection chamber, 532 Electric blower as suction power section, 533 separator, 534 seal packing, 534H hose connection port, 535 control board, 536 cord reel section, A main air path, B bypass air path.

Claims (8)

An electric blower,
A dust collection chamber having a hose connection port and accommodating a paper pack comprising a dust collection bag and a mount;
An upper lid that covers the upper opening of the dust collecting chamber so as to be freely opened and closed;
A part of the surface constituting the upper lid is undulated to make the upper lid uneven, and the recess formed on the back surface of the upper lid formed by the uneven shape extends from the hose connection port side to the electric blower side. A vacuum cleaner characterized by forming part of a road. 2. The vacuum cleaner according to claim 1, wherein the recess on the back surface of the upper lid is configured to extend substantially linearly from the hose connection port side to the electric blower side. The electric vacuum cleaner according to claim 2, wherein the cross-sectional shape orthogonal to the air path of the concave portion on the back surface of the upper lid is substantially the same. The vacuum cleaner according to any one of claims 1 to 3, wherein the uneven shape is provided in a substantially central portion of the upper lid. The vacuum cleaner according to any one of claims 1 to 4, further comprising a decorative part for covering the uneven shape of the upper lid from the front side. Attaching portions for attaching the decorative parts to the upper lid are provided on both end surfaces of the front-side concave portion of the upper lid, and the attaching portions protrude from the upper lid surface or do not penetrate the upper lid. The electric vacuum cleaner according to claim 5, wherein The vacuum cleaner according to claim 6, wherein a width dimension of a concave portion on the front side of the upper lid on which the attachment portion is provided is larger than a slide width for forming the attachment portion with a slide mold. 8. The vacuum cleaner according to claim 7, wherein the width dimension of the concave portion on the front side of the upper lid provided with the attachment portion is made substantially the same across the concave portion on the front side of the upper lid.

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