JPH04348727A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To prevent the paper bag from being flawed and damaged at the time of drawing it out by providing a bulge part which bulges to the inside on the inner bottom of a dust collecting chamber, and positioning it on a production of an axis of a discharge port. CONSTITUTION:A main body case 1 is constituted of the upper case 2 and the lower case 3, and on the bottom face being near the front of the lower case 3, a bulge part 3a which bulges to the inside is provided. To a dust collecting case 10, a disposal bag-like paper filter 22 to which a fitting plate 23 is stuck is attached. To the inner part side of a hose connecting port 28 provided on the front side of an outer cover 11, a communicating tube 29 is connected, and a discharge port 29a of the communicating tube 29 is inserted into a suction opening formed on the fitting plate 23 of the paper filter 22. Also, the bulge part 3a is positioned on a production of an axis of the discharge port 29a.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner having a lid provided on the front upper surface of a vacuum cleaner body, and a hose connection port provided on the lid.

0002

[Prior Art] Conventionally, as shown in Japanese Utility Model Application Publication No. 57-124357, a vacuum cleaner in which a disposable paper bag is installed in a dust collection chamber is used. There was something on the suction port side. On the other hand, there is a vacuum cleaner that has an opening on the top surface and a mounting plate for a disposable paper bag on this surface, as shown in Japanese Utility Model Publication No. 50-116253. The opposing surface is the bottom surface of the main case that constitutes the dust collection chamber. Compared to the former, the latter has a structure that is easier to handle, such as no dirt leaking when taking out the paper bag.

0003

[Problem to be Solved by the Invention] However, in the latter case, compared to the former vacuum cleaner, the dust sucked in is accumulated from the top to the bottom at a faster rate, and at this time, heavy and large dust Or, sharp dust such as stones or glass hits the paper bag.

[0004] Therefore, in some cases, the paper bag is damaged, and when the paper bag is pulled out, it is torn and dust is scattered, resulting in unsanitary conditions.

An object of the present invention is to provide a vacuum cleaner that is hygienic and easy to handle, eliminating the above-mentioned problems.

[0006]

[Means for Solving the Problems] An object of the present invention is to form a dust collection chamber with an opening at the top in a vacuum cleaner body containing an electric blower, and to communicate with a hose through a lid covering the opening of the dust collection chamber. In the vacuum cleaner provided with a discharge port, a paper bag is provided that is attached to the dust collection chamber and communicates with the discharge port, and a bulge portion that bulges inward is provided at the bottom of the dust collection chamber. This can be achieved by locating this bulge on an extension of the axis of the discharge port.

[0007]

[Operation] A bulging portion formed by bulging the case is located on the bottom portion opposite to the suction port of the top opening, and is arranged so as to be in close contact with the paper bag. As a result, the surface of the paper bag facing the bulge has extremely low air permeability and high ventilation resistance, resulting in a region where wind does not flow. Therefore, the flow of air that enters from the suction port avoids the bulge, and as a result, the dust does not go directly down but is dispersed to the left and right, so that the paper bag will not be damaged.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The main body case 1 of the vacuum cleaner is shown in Figures 1 and 2.
As shown in the figure, it is constructed by combining an upper case 2 and a lower case 3.

[0009] The inside of the front side of the main body case 1 is a dust collection case storage section 9. There is an electric blower 4 (Fig. 12) inside the rear side.
) is provided.

[0010] The bottom of the lower case 3 near the front is provided with a bulge 3a that bulges inward, and a small wheel 5 is mounted on the axle 3b.
Casters 5a are rotatably held, and large wheels 6 are provided on both rear sides.

A carrying handle 7 is provided in the center of the upper surface of the upper case 2, and an operating pedal 8 for the cord reel is provided on the rear side of the upper surface.
is provided.

A removable dust collection case 10 is attached to the dust collection case storage section 9. Dust collection case storage section 9
An outer cover 11 that closes the upper case 2 is attached to the upper case 2 so as to be openable and closable. The outer lid 11 and the carrying handle 7 are attached to a support shaft 12
is rotatably supported.

Now, as shown in FIGS. 4 and 6, the dust collection case 10 has a structure in which a holding basket 13 is covered with a filter 14 made of non-woven fabric.

A method of manufacturing the dust collection case 10 will be explained with reference to FIGS. 5 and 6. First, the filter 14 will be described.

[0015] A cotton candy-like polyester fiber of 2 to 5 deniers is formed into a sheet, and the sheet is passed between rollers and lightly compressed. Thereafter, by passing it between rollers for needle punching, a filter element 14 made of a nonwoven fabric as shown in FIG. 5(A) is obtained. The upper surface is raised, and the lower surface is almost flat. filter 1
The thickness of 4 is 1.5mm, and the height of the nap is about 0.5mm.
It is.

Next, the dust collection case 10 will be described.

As shown in FIG. 6(c), the filter 14
The material is cut and then formed into a box shape as shown in FIG. 6(b) with the raised side facing inside, and the joint portions 15 at the upper ends are heat welded. This box-shaped filter 14 is inserted into a mold of a molding machine to mold the shape-retaining cage 14, and at the same time, the filter 14 and the cage 14 are integrally formed.

The shape-retaining cage 14 has a large number of support bones 16. Since most of the support bones 16 are formed inside the filter 14, the support bones 16 and the filter 14 are well connected. That is, when the thermoplastic resin that is the material of the support bone 16 becomes liquid and enters the mold, it flows into the raised interior of the filter 14 and hardens to form the support bone 1.
6 is completed. The support bone 16 goes deep inside the raised part of the filter 14, and as shown in FIG. It is durable.

Note that when the thermoplastic resin hot water flows inside the mold, some of it escapes to the outside of the filter 14. Since the struts 16 may be formed on the outside, the heights of the struts 16 protruding from the inside of the filter 14 are not necessarily the same, but the average protruding height is about 4 mm.

A flange portion 1 is provided at the opening of the dust collection case 10.
7 is formed. An annular airtight packing 18 as shown in FIG. 4 is attached to the flange portion 17.

The corners of the airtight packing 18 are shown in FIG.
As shown in FIG. 11, an indicator packing 19 having a trumpet-shaped upper part is integrally formed. The lower cylindrical portion of this packing 19 fits into a hole 20 formed in the flange portion 17. This hole 20 is located on the outside of the dust collection case 10.

The filter support plate 21 is rotatably attached to the opening of the dust collection case 10. This filter support plate 21 has a size that closes approximately half of the opening.

A disposable bag-shaped paper filter 22, which is detachably attached to the dust collection case 10, has an attachment plate 23 attached thereto. The mounting plate 23 is made of thick hard paper and has a suction opening formed therein. The bag-shaped paper filter 22 is set in the dust collection case 10 by extending the mounting plate 23 between the filter support plate 21 and the opening edge of the dust collection case 10, as shown in FIG.

A spare paper filter 2 is placed inside the outer lid 11.
A filter storage chamber 24 is formed in which the filter 2 is stored. A lid 25 of the storage chamber 24 is attached to the outer lid 11 with a support shaft 26. The inner lid 27 is screwed to the inside of the outer lid 11.

A communication pipe 29 is connected to the rear side of the hose connection port 28 provided on the front side of the outer cover 11. The discharge port 29a of the communication pipe 29 is inserted into a suction opening formed in the mounting plate 23 of the paper filter 22 when the outer lid 11 is closed. Further, the above-mentioned bulging portion 3a is located on an extension of the axis of the discharge port 29a.

A suction seal packing 30 attached to the lower surface of the inner lid 27 so as to surround the outlet 29a of the communication pipe 29 is in close contact with the mounting plate 23 of the paper filter 22 when the outer lid 11 is closed. and is placed so as to surround the suction opening formed in the mounting plate 23.

A communication pipe 29 is integrally formed on the upper surface of the inner lid 27, and an indicator device is also provided. That is, as shown in FIG. 4, a support base 32 that supports the display tube 31 is integrally formed with the inner lid 27. The flexible pipe 33 has one end connected to the display tube 31 and the other end connected to the inner lid 2.
7 is connected. The pipe 33 has a square shape on the display tube 31 side, and a circular shape on the inner lid 27 side. The connections on the inner lid 27 side are clearly shown in FIG.

Since the indicator device is provided all together on the upper surface of the inner lid 27, assembly of the indicator device is easy. When the inner cover 27 is attached to the outer cover 11, the display tube 31 faces the lower window 34 formed in the outer cover 11.

As shown in FIG. 11, when the outer cover 11 is closed, the communication hole 34 at the inner cover 27 to which the pipe 33 is connected is connected to the indicator packing 19 provided in the dust collection case 10. Join. In this way, the display tube 31 is communicated with the dust collection case storage section 9. Since the upper side of the indicator packing 19 has a trumpet shape, it comes into contact with the lower surface of the inner lid 27 to ensure good airtightness. Therefore, the display tube 31 clearly indicates the negative pressure in the dust collection case storage section 9.

A clamp 35 is provided on the front side of the lower case 3. This clamp 35 is rotatably supported by a support shaft 36. The engaging claw 37 of the clamp 35 is connected to the outer lid 1.
It engages with an engagement recess 38 formed on the front side of 1. This prevents the outer lid 11 from opening. When the clamp 35 is operated against the spring 39 provided on the clamp 35 and the engagement claw 37 is removed from the engagement recess 38, the outer cover 11 is moved by a spring (not shown) provided at the support shaft 12. It is opened by force.

A partition plate 40 is provided on the back side of the dust collection case storage section 9 of the main body case 1. This partition plate 40 is
The configuration is as shown in FIGS. 4 and 7. Partition plate 40
A ventilation hole 41 is formed, and a cam stand 42 is rotatably attached. The transmission gear 43 to which the cam stand 42 is attached is placed on the back side of the partition plate 40. The front side of the partition plate 40 is the dust collection case storage section 9.
It is attached so that it is on the side.

A dust remover housing section 44 is formed on the back side of the partition plate 40 and is largely recessed toward the front side. The dust remover storage section 44 is not provided with a ventilation hole 41. The dust remover 45 attached to the dust remover housing 44 has its free end protruding toward the cam base 42 from a window 46 formed in the side wall of the dust remover housing 44 facing the cam base 42 side. The fixed part side of the dust remover 45 is supported by a support part formed in the dust remover storage part 44. As shown in FIGS. 7 and 8, this support part is
It is composed of a locking piece 47 and a locking boss 48. The locking piece 47 and the locking boss 48 are formed integrally with the partition plate 40. A locking claw 49 is formed at the tip of the locking piece 47. A slit is formed between the locking piece 47 and the locking boss 48. The dust remover 45 has a fixed portion formed in a curved shape. The dust remover 45 is attached by fitting this curved portion into the slit. The locking piece 47 is made of plastic and is somewhat flexible. The outside of the locking claw 49 is sloped closer to the slit. Therefore, when the curved portion is pushed into the slit, the locking piece 47 escapes so that the slit opens, so that the curved portion is easily inserted into the slit. Once inserted, the locking claw 49 prevents the curved portion from coming out of the slit. In addition, the locking boss 48
Similarly to the locking claw 49, if the outer end side of the locking claw 49 is also sloped, insertion into the slit of the curved portion can be performed more easily.

The end of the dust remover 45 immediately beside the curved portion is inserted into an engagement slit provided in the dust remover housing 44, although it is not shown in the drawings.

Since the curved portion of the dust remover 45 is held between the locking boss 48 and the locking piece 47, the dust remover 45 is fixed in the longitudinal direction. The locking piece 49 prevents it from coming off toward the front side, as described above. Furthermore, since the end immediately next to the curved part is inserted into the engagement slit as mentioned above,
Together with the previous fixation in the longitudinal direction, the fixed portion side of the dust remover 45 is securely fixed to the partition wall. Furthermore, since the dust remover 45 is attached without using screws, assembly is easy.

The dust remover 45 is made of a steel material with high spring properties. The free end side of the dust remover 45 swings within the height range of the window 46. Since both sides of the window 46 serve as guides for the pendulum movement of the dust remover 45, the free end of the dust remover 45 pendulums without any horizontal wobbling.

The partition wall 40 is formed of plastic using two molds that are punched out on the front side and the back side, so that the window 46 and the locking piece can be punched out. That is, at the base of the locking piece 47, the part corresponding to the slit side has an opening at least as large as the locking claw 49. Further, at the bottom 50 of the window 49, the corner portion of the dust remover storage portion 44 is removed to the back side by at least the thickness of the window 46.

As shown in FIG. 7, the cord reel 51 is
A power cord 52 is wrapped around it. Since the cord reel 51 is provided with a spring (not shown), the power cord 51
This is done automatically by the force of the second winding spring.

A gear 53 is formed on the cord reel 51. This gear 53 meshes with the transmission gear 43. When the cord reel 51 is rotated, the transmission gear 43
The cam stand 42 is rotated through the cam stand 42, and the dust remover 45 is oscillated by the rotation of the cam stand 42. This cam stand 42 will be explained.

As shown in FIG. 8, the shaft boss 54 of the transmission gear 43 has a square engagement hole 55 formed therein. Cam stand 42
A pair of engaging pieces 56 are integrally formed on the central back surface of the holder. An engaging pawl 57 having a tapered head portion is formed at the tip of the engaging piece 56. When the engagement piece 56 is inserted into the engagement hole 55, the engagement claw 57 protrudes from the back surface of the transmission gear 43, and the engagement claw 57 engages with the opening edge of the engagement hole 55. Transmission gear 4 attached to such partition plate 40
3 and the cam base 42 are combined.

When the engagement piece 56 enters the square engagement piece 55, the transmission gear 43 and the cam base 42 are prevented from rotating. Also, when inserting the engagement piece 56 into the engagement hole 55,
Since the head of the engaging claw 57 is tapered, the engaging piece 56 is bent inward, and the above-mentioned insertion is easily performed.

A support shaft 59 for rotatably supporting a cam 58 is integrally formed on the surface of the cam base 42. Support shaft 59
is provided at a position offset from the rotation center of the cam base 42. A cap 60 is formed at the tip of the support shaft 59 to prevent it from coming off. A cam stopper 61 is provided beside the support shaft 59 to regulate the rotation angle of the cam 58.

A cam spring 62 is attached to the support shaft 59 to apply a force in one direction to the cam 58. A spindle hole 63 into which the spindle 59 is fitted is formed in the cam 58 . Support shaft hole 6
3 has a shape that allows the umbrella 60 to pass through. cam spring 62
When the cam 58 is attached to the support shaft 59, the cam spring 6
A hook 64 formed at one end of the cam 58 engages a shoulder of the cam 58, and the other engages a groove 65 formed in the cam stopper 61. Cam 5 installed in this way
8 has a force applied to one side by a cam spring 62.

Now, regarding the relationship between this cam 58 and the dust remover 45, when the dust collection case 10 is not stored in the dust collection case storage section 9, as shown in FIG. The end does not engage the cam 58.

When the dust collection case 10 is placed in the dust case storage section 9, the vibrating protrusion 66 formed on the outer back surface of the dust collection case 10 pushes down the dust remover 45 from above. This is shown in FIG. 9(b).

When the dust remover 45 is pushed down a little, the cam 58 comes to engage with the dust remover 45. That is, when shown in FIG. 9(a), the tip of the dust remover 45 is located outward from the tips of the cam base 42 and the cam 58. However, in the case shown in FIG. 9(b), the dust remover 4
Since the tip of cam 58 is located inside the tip of cam 58,
As shown in FIGS. 9(c) and 9(b), when the cam base 42 rotates, the cam 58 engages with the dust remover 45.

When the cam stand 42 rotates in the direction shown in (c), the dust remover 45 is pulled down by the cam 58. When the cam base 42 further rotates, the dust remover 4 is removed from the tip of the cam 58.
5 comes off and the dust remover 45 suddenly returns to its original state by its own spring force. As a result, the vibrating protrusion 66 causes the dust remover 45 to
be beaten by The vibration generated at this time is the dust collection case 1.
Make them roll 0. The paper filter 20 housed inside the dust collection case 10 also vibrates at the same time. paper filter 20
And dust removal from the dust collection case 10 is performed at the same time. Since the vibrating protrusion 66 is formed integrally with the shape-retaining basket 13 of the dust collection case 10, the dust collecting case 10 vibrates well even in areas far from the vibrating protrusion 66, so that the dust removal is not limited to localized areas. , is commonly practiced throughout.

When the cam base 42 rotates in the direction (d), even if the cam 58 touches the dust remover 45, the cam 58 rotates and escapes, so the dust remover 45 is not pulled down. Therefore, the dust remover 45 does not hit the vibration protrusion 66.

Although the embodiments of the present invention have been described above mainly from the perspective of structure, the embodiments of the present invention will now be described from the perspective of operation.

As the electric blower 4 operates, air containing dust passes through the hose connection port 28 and the communication pipe 29 and flows into the paper filter 22. Coarse dust and fine dust are collected in the paper filter 22, and air passes through the ventilation holes of the paper filter 22 and heads toward the filter 14 of the dust collection case 10. The fine dust that has blown through the paper filter 22 is captured by the filter 14. The air that has passed through the filter 14 passes through the ventilation hole 41 of the partition wall 40, further passes through the electric blower 4, and is discharged to the outside of the main body case 1.

Dust attached to the inner surface of the paper filter 22 and the inner surface of the filter 14 is removed by rotating the cord reel 51 as described above. When the paper filter 22 is full of dust, open the outer lid 11 and throw away the dust together with the paper filter 22. Then, by installing a new paper filter 22 into the dust collecting case 10, cleaning can be performed again.

The amount of dust that accumulates in the dust collection case 10 is extremely small compared to the amount of dust that accumulates in the paper filter 22, but since the dust that accumulates here is fine dust, the filter 1
4. Clogging is easy to occur. However, since the dust adhering portion of the filter 14 has raised fluff, it is less likely to become clogged than a filter without raised fluff. That is, as shown in FIG. 5B, the fine dust particles 67 are caught at the tips of the naps, or are attached to the naps by entering between the naps.
This means that the dust particles come into close contact with each other. There are also fewer dust particles attached to the base of the nap. In filters with a flat, unraised surface, dust particles adhere closely to each other and to the ventilation surface of the filter, causing clogging of the filter and immediately deteriorating the suction performance. However, in the case of this example, due to the action of raising as mentioned above,
This prevents clogging and improves suction performance.

[0052]

Therefore, according to the present invention, it is possible to provide a sanitary vacuum cleaner in which there is no fear that the paper bag filter will be damaged by the dust-containing airflow during dust collection.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a vacuum cleaner main body.

FIG. 2 is a side view of the vacuum cleaner main body with the dust collection case storage section side cut away.

FIG. 3 is a perspective view of the state in which the outer lid is opened and the dust collection cases are removed and placed side by side.

FIG. 4 is an exploded perspective view of the dust collection case, inner lid, and partition wall.

FIG. 5 is an enlarged view of the main parts of the dust collection case.

FIG. 6 is a schematic diagram showing the manufacturing process of the dust collection case.

FIG. 7 is an exploded perspective view of the dust collection case, partition wall, and cord reel arranged side by side.

FIG. 8 is an exploded perspective view of related parts of the dust remover and the cam stand.

FIG. 9 is a diagram showing the operation of a cam.

FIG. 10 is an enlarged perspective view of the airtight packing with a spot on the indicator packing.

FIG. 11 is an enlarged sectional view showing a sealed state between the indicator packing and the inner lid.

FIG. 12 is a schematic diagram summarizing the relationship between the dust collection case, the electric blower, and the cord reel from the viewpoint of the suction state.

[Explanation of symbols]

1... Main body case, 4... Electric blower, 10... Dust collection case,
11...Lid body.

Claims (1)

[Claims] Claim 1: A vacuum cleaner in which a dust collection chamber with an open top is formed in a vacuum cleaner body containing an electric blower, and a discharge port communicating with a hose is provided in a lid covering the opening of the dust collection chamber. , a paper bag is provided that is attached to the dust collection chamber and communicates with the discharge port, and a bulge that bulges inward is provided at the bottom of the dust collection chamber, and the bulge is connected to the discharge port. A vacuum cleaner characterized by being located on an extension of the axis.