JPS6038452Y2 - vacuum cleaner - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improved structure for a vacuum cleaner.

In a conventional vacuum cleaner, as shown in FIG. 13, a net-like filter 22 is disposed inside the dust collection case, and a grid-like sweeper 52 that slides up and down is provided in front of the filter. The bending piece 77 formed at the upper end of the sweeper is inserted through the ceiling wall of the dust collecting case, and the seal ring A is arranged at the lower end of the operating shaft 54 which is biased upward by a coil spring to form a mounting net. I try to remove dust from the filter.

In the above configuration, when the operation shaft is pushed down to scrape off the dust adhering to the front surface of the net-like filter, the dust inside the dust collection case is removed from the folded piece 7 as shown in FIG.
7 and the sweeper 52 may not be able to fully return.

This not only impedes the operation of the sweeper, but also causes problems such as poor sealing between the dust collection case and the operating shaft, causing air leakage and deteriorating the performance of the cleaner.

The present invention was developed in view of the above points, and by devising a seal structure between the dust collection case and the operating shaft, the vacuum cleaner can be operated without dust inside the dust collection case interfering with the return operation of the sweeper. The purpose is to improve the performance of

In order to achieve the above object, the vacuum cleaner of the present application includes a net-like filter disposed in a dust collection case, a grid-like sweeper that slides up and down on the front surface of the filter,
an operating shaft that penetrates the ceiling wall of the dust collection case and fixes a bent piece formed at the upper end of the sweeper via a sealing member; a compression coil spring that biases the operating shaft upward; The guide tube is provided below the ceiling wall of the dust collection case, surrounds the connecting portion of the operating shaft and the bending piece, and brings the peripheral edge of the seal member into sliding contact with the inner surface.

Therefore, even if the operating shaft is pushed down, the existence of the guide cylinder prevents dust from entering the bent piece, and the sweeper always returns to its normal position, and the seal between the dust collection case and the operating shaft is ensured, preventing air leakage. Deterioration in the performance of the vacuum cleaner is also prevented.

An embodiment of the present invention will be described below with reference to the drawings.

The vacuum cleaner main body 1 has a dust collection case 2 in the front section and a fan case 3 in the rear section.

First, the structure of the blower case 3 will be explained. The case has a handle 4 on the top surface and rear wheels 5 on both sides of the bottom, and the inside is divided into a blower chamber 6, an exhaust chamber 7, and a co-reel chamber 8. .

An electric blower 9 is supported in the blower chamber 6 with its suction side facing forward.

The blower chamber 6 and the exhaust chamber 7 communicate with each other, and the blower chamber 6 is provided with an intake port 10, and the exhaust chamber 7 is provided with a distributed exhaust port 11.

A vertical cord reel 12 is arranged in the cord reel chamber 8 .

The cord reel 12 is connected to cords 1 to '13 by a mainspring spring.
The winding rotation is stopped by an appropriate brake device.

It is a regular model.

The upper flange of the cord reel 12 is a gear 14, a part of which is exposed through a window 16 provided in the front wall 15 of the blower case 3.

On the other hand, the dust collection case 2 has an opening at the rear face facing the blower case 3, but the horizontal dividing line 17 shown in FIG.
At this point, it is divided into an upper portion 2U and a lower portion 2L.

The upper portion 2U is provided with a handle 18 and a hose connection 19,
A swivel front wheel 20 is mounted on the lower part.

21 is a filter unit supported by the upper portion 2U.

The filter unit 21 has a front stage filter 22 and a rear stage filter 23.

The front filter 22 is in the form of a flat synthetic resin frame covered with a synthetic fiber net, and is attached to the inner wall of the upper portion 2U at an angle close to perpendicular.

The rear-stage filter 23 is made by bending a resin-treated nonwoven fabric into a tube shape having many folds in the axial direction, and has synthetic resin end plates 24 and 25 formed at the front and rear ends by injection molding. There is.

Reference numeral 26 denotes a substrate that supports the rear-stage filter 23, and a sealing member 27 that closely contacts the inner periphery of the dust collection case 2 and the front surface of the blower case 3 is attached to the periphery.

The substrate 26 is prevented from being easily dislodged from the upper portion 2U by a fitting relationship or other suitable means.

A bearing part 28 is formed in the center of the base plate 26, in which a cylindrical shaft part 30 of the dust removal body 29 is rotatably viewed from the front, and a cylindrical shaft part 32 of the large gear 31 is rotatable from the rear. inserted.

The cylinder shaft portions 30, 34 are intermeshed and non-rotatably connected.

Further, in this cylinder shaft portion 30.32, a rear stage filter 23 is installed.
A central shaft 33 integrally formed with the front end plate 24 of the front end plate 24 is rotatably inserted, and a retaining seat plate 34 is screwed to the rear end.

Thereby, the rear filter 23 is rotatably supported.

The rear end plate 25 of the rear filter 23 is donut-shaped and allows the inside of the rear filter 23 to communicate with the outside.

A sealing member 35 that contacts the substrate 26 is attached around the end plate 25 .

Although not shown, an appropriate number of ventilation holes are provided in the area of the substrate 26 surrounded by the sealing member 35.

Although not shown, the large gear 31 is also provided with an appropriate number of ventilation holes to improve ventilation.

Now, the dust removal body 29 has a plurality of elastic arms 36 that protrude radially.
This is used to repel the folds of the rear filter 23 from the inside.

For reinforcement, a protective layer 37 is formed on the ridges of the folds from the same synthetic resin as that used to mold the end plates 24, 25.

A gear box 8 is configured in the lower part of the board 26, and here,
A gear shaft 47 having an input gear 39 and a pinion 40 is pivotally supported.

A portion of the input gear 39 and the pinion 40 each protrude outside the gear box 38 , the input gear 39 meshes with the cord reel gear 14 , and the pinion 40 meshes with the large gear 31 .

A seal member 42 is attached to the gear box 41 so as to surround the protruding portion of the input gear 39 and come into close contact with the blower case 3.

The large gear 31 has a small gear 43 at its root, and a small gear 44 pivotally supported on the front surface of the base plate 26 meshes with this.

A ring-shaped stopper 45 is formed on the front surface of the small gear 44 .

The stopper 45 is located in the rotation trajectory of the protrusions 46 provided at predetermined intervals on the end plate 5 of the post-stage filter 23, and has a notch 47 provided at an opposing location.

When the cord reel 12 rotates now, the rotational force is transmitted to the dust removal body 29 via the input gear 39, pinion 40, and large gear 31.

As the dust removal body 29 rotates, the rear filter 23 also tries to rotate, but one of the protrusions 46 hits the outer surface of the stopper 45, so the rotation of the rear filter 23 is stopped, and a relative movement occurs between the rear filter 23 and the dust removal body 29. , the elastic arm 36 repels the protective layer 37 and the subsequent filter 23
It releases dust from the surface.

Since the stopper 45 also rotates while the dust removal body 29 rotates, the notch 47 eventually matches the protrusion 46 and the protrusion 46 enters the stopper 45.

As a result, the rear filter 23 rotates together with the dust remover 29 until the protrusion 46 collides with the inner surface of the stopper 45.

When the protrusion 46 is stopped on the inner surface of the stopper 45, relative movement occurs again between the rear filter 23 and the dust removal body 29.

Eventually, when the notch 47 coincides with the protrusion 46, the protrusion 46
comes out of the stopper 45, and the rear filter 23 rotates until another protrusion 46 hits the outer surface of the stopper 45.

In this way, the rear filter 23 rotates step by step, and the protrusion 46
The dust is removed by being alternately subjected to the impact when it hits the stopper 45 and the vibration when the elastic arm 36 repels the protective layer 37.

The inside of the dust collection case 2 is divided into a primary dust collection chamber 43 and a secondary dust collection chamber 49 with the front stage filter 22 as a boundary.

A fine dust outlet 5 is provided on the lower surface of the secondary dust collection chamber 49 to drop dust that has fallen from the rear filter 23 into the primary dust collection chamber 48.
0 is formed.

The fine dust outlet 50 has a lid 51 whose rear end is pivotally supported on the base plate 26.
closed by.

The lid 51 is always urged in the closing direction by a spring (not shown).

52 is a sweeper arranged in front of the pre-stage filter 22.

As seen in FIG. 11, the sweeper 52 is in the form of a lattice having a plurality of horizontal rungs, and has finger hooks 53 hanging downward on both sides of its lower end.

The sweeper 52 slides in the vertical direction while contacting the front stage filter 22.

The upper end of the sweeper 52 is connected to an operating shaft 54 that penetrates the ceiling wall of the upper portion 2U and enters the primary dust collection chamber 48.

The operating shaft 54 is urged upward by a compression coil spring 55 placed on the upper surface of the upper portion 2U, and the sweeper 52 is pulled upward.

When the operating shaft 54 is pressed, the sweeper 52 descends as shown in FIG. 11 to remove dust from the front filter 22, and the lower end of the sweeper 52 pushes the free end of the lid 51, opening the fine dust outlet 50. It is something that opens the door.

The lower part 2L of the dust collection case 2 has a clamp 56 on the front outer surface.
The rear inner surface has a hook-shaped elastic piece 57, which is attached to the upper part 2.
It is coupled to the upper part by engaging the front recess 58 of the U and the lower recess 59 of the substrate 26.

The clamp 56 is pivotally supported at the center in a seesaw shape, and is biased in the engagement direction by a torsion spring 60 attached to the pivot shaft.

The lower part 2L has an engagement piece 62 that engages with a bracket 61 protruding from the lower end of the blower case 3, and the upper part 2U has
The handle 18 has a spring-loaded clamp 63 that engages with the front part of the handle 4 on the side of the blower case.

These engaging pieces 62 and clamps 63 connect the dust collecting case 2 to the blower case 3 with the upper portion 2U and lower portion 2L connected.

A continuous projecting wall 64 in the shape of an enclosure is formed inside the lower portion 2L, and a bag accommodating portion 65 is formed inside the projecting wall 64.

A dust bag 66 such as a plastic bag is placed in the bag accommodating portion 65, and its mouth edge is folded back to the outside of the projecting wall 64.

The dust bag 66 is held in a downwardly bulging state.

The remaining part of the dust bag 66 is pushed into a pocket part 67 formed in the front part of the bag storage part 65.

Opposing the protruding wall 64, a groove is formed in the lower peripheral edge of the upper portion 2U to form a split attachment portion 68.

Regarding the portion where the rear side of the protruding wall 64 faces the lower surface of the filter unit 21, no groove is provided in the filter unit 21, and the protruding wall 64 is only brought into contact with the filter unit 21.

Inside the split attachment portion 68, leaf spring pieces 69 bent into fishhook shapes as shown in FIG. 7 are fixed at several locations.

When the upper part 2U is placed over the lower part 2L with the dust bag 66 attached, the protruding wall 64 tears the edge of the dust bag 66 between the inner wall of the mounting part 68 and the leaf spring piece 69, as shown in FIG. Push it in between.

After this, when the upper part 2U and the lower part 2L are separated, the protruding wall 64 separates from the split attachment part 68 as shown in FIG. This is what is left behind.

70 hangs down from the inner surface of the upper part 2U and reaches the entrance of the pocket part 67, and the dust bag 6 pushed into the pocket part 67
This is a rib that prevents the remainder of the number 6 from escaping.

When the protruding wall 64 is detached from the tear attachment part 68, the upper end of the clamp 56 hits the protruding wall 64 as shown in FIG. It is something that

A seal member 71 is attached to the upper part 2U along the dividing line 17 to maintain airtightness between the upper part 2U and the lower part 2L of the dust collection case.

The outer edge of the sealing member 71 protrudes outside the dust collection case 2 except for the portion that becomes the engagement passage for the clamp 56, and the outer edge of the sealing member 71
It becomes 2.

An elastic bumper 73 aligned with the bumper 72 is attached around the blower case 3.

When the lower part of the main body 1 is inserted into the upper opening of the bucket-shaped suction parts storage case 74 as shown in FIG. 1, the bumpers 72 and 73 come into contact with the opening edge of the suction parts storage case 74.

The connection point between the sweeper 52 and the operating shaft 54 has the following structure.

First, the sweeper 52 is molded from polypropylene, and as shown in FIGS. 10 and 11, there is a narrow part 75 at the top.
form.

A horizontal bent piece 77 is integrally formed at the upper end of the narrow portion 75 via a thin hinge portion 76 .

A guide cylinder 78 with a rectangular cross section that receives the bent piece 77 and the narrow part 75 is formed on the inner wall of the upper part 2U of the dust collecting case.

The three walls of the guide tube 78 are formed by hanging walls integral with the upper portion 2U, and the remaining wall is formed by the frame 79 of the pre-stage filter 22.

The inner surface of this guide cylinder 78 is brought into contact with the periphery of the bending piece 77 or the periphery of a sealing member attached to the bending piece 77.

In the illustrated embodiment, a rectangular flat sealing member 80 is sandwiched between the bent piece 77 and the seat plate 81.
By screwing the screw 82 into the operating shaft 54 through the seat plate 81, the bending piece 77 is fixed to the operating shaft 54, and the sealing member 80 is fixed to the bending piece 77 at the same time.

An airtight seal portion is formed between the periphery of the seal member 80 and the inner surface of the guide tube 78 to prevent outside air from entering the case from the penetrating portion of the operating shaft 54.

Note that a leaf spring 83 is fixed to the lower surface of the bending piece 77 by a screw 82, and applies a biasing force to the sweeper 52 in a direction to bring it into close contact with the front stage filter 22.

Next, the action will be explained.

Attach the dust bag 66 to the lower part 2L of the dust collection case 2, cover the upper part 2U over it, connect the upper and lower parts 2U and 2L with the hook-shaped elastic piece 57 and the clamp 56, and then attach this to the blower case. 3 and then connect a hose to the hose connection port 19 and operate the electric blower 9, air containing dust will flow into the dust collection case 2.

Large particles of dust are captured by the front-stage filter 22, and small particles are captured by the rear-stage filter 23.

Before the start of cleaning and after the end of cleaning, as the cord 13 is inserted and removed, dust is removed from the rear filter 23 as described above, and fine dust falls and accumulates on the lid 51.

When a large amount of dust has been sucked in and it is time to throw it away, the second
As shown in the figure, remove the clamp 63 to open the space between the dust collection case 2 and the blower case 3, and use the handle 18 to pull up the upper part 2U of the dust collection case 2 from the lower part 2L.

If the upper part 2U is pulled up, especially the rear part, the hook-shaped elastic piece 57 will be disengaged first, so the upper part 2U will be pulled up in that state.
If U is shifted backwards, the clamp 56 can be disengaged without particularly touching the clamp 56.

After the hook-shaped engagement piece 57 and the clamp 56 are disengaged in this way, when only the upper portion 2U is pulled up, the dust-receiving bag 66 is moved upward along with the upper portion 2U because the mouth edge is gripped by the bag attachment portion 68. lifted up.

When lifted, the dust bag 66 is pulled by the portion pushed into the pocket portion 67 and extends downward, forming a long hanging shape as shown in FIG.

When the operating shaft 54 is pressed here, the sweeper 52 sweeps the surface of the front-stage filter 22 to peel off the coarse dust layer, and removes the dust-receiving bag 66.
drop it into the

At the same time, the sweeper 52 pushes the lid 51 to cause the fine dust accumulated thereon to fall into the dust bag 66.

When the dust has completely transferred to the dust receiving bag 66,
Pull 6 firmly to remove it from the upper part 2U, tie it and throw it away.

Just set a new dust bag on the back and use it again.

As described above, in the present invention, the folded piece fixed to the operating shaft via the seal member is surrounded by the guide tube formed from the ceiling wall of the dust collection case, so that the dust inside the dust collection case is swept away.
This prevents the situation from interfering with the return operation, ensures smooth operation of the sweeper, and has a great practical effect.

[Brief explanation of the drawing]

Figures 1 to 12 show an embodiment of the vacuum cleaner of the present invention, Figure 1 is a side view showing a cross section of the suction parts storage case, and Figure 2 is a side view illustrating how the dust collection case is separated. , 3rd
The figure is a sectional view, Figure 4 is a sectional view of a part of the rear filter, Figure 5 is a rear view of the same part, Figure 6 is a sectional view of the lower part of the dust collection case, and Figures 7.8.9 are bag attachment parts. FIGS. 10 and 11 are partial sectional views illustrating how the dust bag is set in the sweeper, and FIGS.
FIG. 2 is a sectional view of the upper part of the dust collecting case, illustrating the operation of transferring dust to the dust collecting bag. FIGS. 13 and 14 are partial sectional views in different states when the present invention is not implemented. 2... Dust collection case (case), 22...
・Pre-stage filter (filter), 52...Sweeper 177...Bend piece, 54...
Operation axis, 78...Guide tube, 80...
Seal member.

Claims (1)

[Scope of utility model registration request] A net-like filter disposed inside the dust collection case, a lattice-like sweeper that slides up and down on the front surface of the filter, and a lattice-like sweeper installed through the ceiling wall of the dust collection case and formed at the upper end of the sweeper. an operating shaft that fixes the bent piece through a sealing member; a compression coil spring that biases the operating shaft upward;
The guide tube is formed below the ceiling wall of the dust collection case, and surrounds the connecting portion between the operating shaft and the bending piece, and allows the peripheral edge of the seal member to slide into contact with the inner surface. Vacuum cleaner.