JPS6057334B2 - Vacuum cleaner dust removal device - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a dust removal device for a vacuum cleaner, which is equipped with a wave-shaped main filter that captures fine dust on the downstream side of a net filter that captures coarse dust. In particular, the present invention relates to a device that prevents coarse dust from adhering to a net filter by constantly performing self-cleaning of the net filter using airflow from a shielding plate.

[Conventional technology]

Conventionally, in this type of vacuum cleaner (e.g., 1986-696 Sae), the dust-containing airflow sucked into the dust case flows toward the entire surface of the net filter, so coarse dust such as cotton dust is removed from the net filter. It adheres to almost the entire surface of the surface.

In order to remove the coarse dust that has adhered to the net filter, even if you collide the dust remover with a vibration receiver installed in a part of the net filter and vibrate the net filter, the coarse dust that has adhered to the entire surface of the net filter will be removed. It is not possible to remove dust from every corner. In addition, a vacuum cleaner with a dust removal filter installed above and a detour circuit installed above (1986)
-3928) had the disadvantage that fine dust adhered to and bit into the filter near the air passage, easily causing clogging.

[Problem that the invention seeks to solve]

Therefore, in order to eliminate the above-mentioned drawbacks, the present invention provides a shielding plate between the net filter and the main filter so as to cover the area except for the upper part of the net filter frame, thereby forming a detour passage. A part of the air passes through the net filter and flows back to the upstream side of the net filter by the shielding plate, blowing away the coarse dust attached to the net filter, while the airflow accelerated in the detour path follows the waves of the main filter. The filter flows from top to bottom, blowing off dust attached to the main filter and automatically cleaning both the net filter and the main filter.

Then, coarse dust such as cotton dust gradually begins to adhere to the net filter from the top. An object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to provide a vacuum cleaner capable of preventing the coarse dust blown away by the airflow flowing back to the upstream side of the net filter from re-adhering to the net filter. Our objective is to provide a dust removal device. [Means for Solving the Problems] In order to achieve the above object, the present invention has the following configuration.

A dust case that has a suction port and houses a net filter frame is removably provided in front of the main body case equipped with an electric blower, and a corrugated main filter frame made of non-woven fabric is installed from behind within the net filter frame. In the dust removal device for a vacuum cleaner inserted and fixed, a shielding plate is provided at a predetermined interval between the main filter and the net filter so as to cover the net filter frame except for the upper part thereof, and a detour path to the main filter is provided. This is a dust removal device for a vacuum cleaner, which is characterized by having the following features:

Therefore, in the present invention, when a part of the airflow that collides with the shielding plate provided between the net filter and the main filter flows back and passes through the net filter again, the coarse dust attached to the net filter is blown away, thereby self-cleaning. While doing so, turn around to the detour.

The airflow that has entered the bypass passage always flows from above to below along the corrugations of the wavy main filter, cleaning the main filter surface. [Embodiments of the Invention] Hereinafter, the present invention will be explained in detail based on the drawings of one embodiment.

In the drawings, the main body of the vacuum cleaner consists of a main body case 1 and a dust case 2, and the dust case 2 is detachably attached to the front surface of the main body case 1.

A groove-shaped receiving portion 3 is provided at the lower front surface of the main body case 1, and an engaging protrusion 4 that engages with the receiving portion 3 is provided at the lower rear surface of the dust case 2.

A clamp 5 that seesaws is provided at the top of the dust case 2. A locking receiving portion 7 for receiving a locking pawl 6 which is the tip of the clamp 5 is provided on the upper front surface of the main body case 1 . The dust case 2 is detachably attached to the main body case 1 using the clamp 5 and the like.
An electric blower 10 is provided inside the main body case 1 .

The electric blower 10 includes a blower section 11 and an electric motor 12. This electric blower 10 is placed in an electric blower storage chamber 15 with the front side of the blower section 11 and the rear side of the electric motor 12 interposed between anti-vibration rubbers 13 and 14. An exhaust port 16 for discharging exhaust air from the electric blower 10 is provided on the rear side of the main body case 1, as shown in FIG.

In order to reduce the exhaust noise from the exhaust port 16, an electric blower 1 is installed.
Sound absorbing materials 17 and 18 made of moltoprene are provided around the exhaust port 16 and inside the exhaust port 16. 19 is the electric motor 12
The remote control relay 20 that controls the operation of the motor 12 is a capacitor that absorbs noise generated from the commutator surface of the motor 12, and is fixed to the motor 12 with screws or the like.

A cord reel storage chamber 22 is provided below the main body case 1 and is defined by a lower partition plate 21 that partitions the electric blower storage chamber 15 .

The cord reel 23 is placed here, and the reel shaft 24
is rotatably supported. The lower end of the reel shaft 24 is
It is supported by a contact stand 25 provided on the lower inner surface of the cord reel storage chamber 22 and whose upper end is provided on the partition plate 21 . The lower plate 26 of the cord reel 23 has teeth 27 on its outer periphery.

The face gear 28 that engages with the teeth 27 is rotatably supported by a support plate 30 provided on the front wall 29 of the main body case 1 . A drive clutch plate 31 is screwed to the face gear 28 at a position on the front surface of the main body case 1 . This drive clutch plate 31 is provided with an engaging pawl 32, and an engaging pawl 69 engages with this engaging pawl 32. 33 is provided at the top of the main body case,
It is also an outlet for drawing power, and is used, for example, to connect a plug for a power brush.

34 is a handle, and a dust indicator 35 is provided above the handle.

36 is a cover of the dust indicator 35.

The dust indicator 35 is communicated with the electric blower storage chamber 15 and the suction chamber 38 via a communication pipe 37 .

39 is a hole through which the suction chamber 38 and the communication pipe 37 communicate.

The suction port 40 of the suction chamber 38 is provided approximately at the center of the front surface of the main body case 1, and a lattice is provided here. The main body case 1 is provided with wheels 41 for running.

A front cover 42 is attached to the front surface of the dust case 2 with screws, and has a hose insertion port 43 that projects inward.

The tip of this hose insertion port 43 is attached to the suction opening of the dust case 2 via a backing 44.
A check valve 45 is integrally formed in the backing 44 . 46 is a handle for the dust case forming the front cover 42.

47 is a caster provided on the lower surface of the dust case 2.

A dust collection and removal device is detachably attached to the dust case 2.

This dust collection and removal device includes a net filter frame 48,
And they are assembled in a net filter frame 48.
The net filter frame 48 made of ABS resin has a square shape, and has a fine dust outlet 49 on its lower surface and a net 51 for filtering coarse dust on its front surface.

This net 51 is integrally attached to the net filter frame 48, and is formed by knitting nylon thread. The dust collecting and removing device including the net filter frame 48 is taken in and out from the rear opening of the dust case 2.

A recess 89 is formed in the lower part of the net filter storage section 53 of the dust case 2, and has a step 88 that comes into contact with the wall surface 54 forming the fine dust outlet 49 so as to seal at least coarse dust. . 56 is a main filter for fine dust made of a nonwoven fabric formed into a wave shape.

This main filter 56 has a frame portion 57 . The outer periphery of this frame portion 57 is joined to the net filter frame 48 via a filter backing 58. This filter backing 58 is connected to the joint surface between the main body case l and the dust case 2, and between the net filter frame 48 and the main filter 5.
6 and the dust case 2.

Locking projections 59 are provided on the upper and lower sides of the frame portion 57 of the main filter 56, and the locking projections 59 are connected to locking holes 60 formed on the upper and lower outer peripheries of the net filter frame 48. , thereby causing the main filter 56
is held within the net filter frame 48.

61 is a support plate of the dust removal device, and the filter backing 5
8 and attached to the frame 57 of the main filter 56.

At the center of this support plate 61, a holding base 63 holding a dust remover 62 formed of an elastic wire (piano wire) is rotatably supported. A disc 64 is screwed to this holding base 63. A hole 87 into which a finger can be inserted is provided in the disc 64, and this hole 87 also serves as a handle for dust removal operation. A support shaft 65 is integrally formed on the lower side of the support plate 61.

A drum 66 and a spring 67 are attached to the support shaft 65 . The drum 66 has teeth 68 on its outer periphery.
Further, an engaging pawl 69 for a passive clutch is formed on the outer end surface. This passive clutch engagement claw 69 engages with the engagement claw 32 of the drive clutch plate 31 by attaching the dust case 2 to the main body case 1. The spring 67 is
This is provided to allow the drum 66 to slide so that the engagement claws 32 and 69 can engage smoothly. A toothed portion 70 is provided on the outer periphery of the disc 64.

Since this tooth portion 70 engages with the tooth portion 68 of the drum 66, it applies rotational force to the dust remover 62 via the rotary face gear 28 of the cord reel 23, the drive clutch plate 31, the drum 66, and the disc 64. communicated. Above the main filter 56, as shown in FIGS. 1 and 3, there is provided a dust removal drive device for the net filter frame 48 which is on the primary filter side.

The dust removal cam 11 of this dust removal drive device is rotatably supported by a bearing 72 integrally formed on the upper side of the frame portion 57.
A dust removal seal packing 73 is fitted to the outer periphery of the bearing 72. A support shaft 74 is attached to the back surface of the dust removal cam 71 with a screw. The dust removal cam 71 and the support shaft 74 are reliably fixed in the rotational direction by a concave-convex engagement. A drive coupling 75 is attached to the outer periphery of the support shaft 74.
and a passive coupling 76 are supported. The drive coupling 75 is rotatable, while the passive coupling 76 is slidable in the axial direction but is fixed in the rotational direction. A flange 7 is attached to the outer end of the support shaft 74.
7 is provided. Since a spring 78 is provided on the support shaft 74 between the flange 77 and the passive coupling 76, the passive coupling 76 receives a force pressing against the drive coupling 75. Drive coupling 7
The outer periphery of 5 is supported by an auxiliary bearing 19, and a toothed portion 8 that engages with the toothed portion 70 of the disc 64 is provided on the outer periphery of the large diameter portion.
0 is formed. The driving coupling 75 and the passive coupling 76 are provided with engagement pawls 81 and 82, and these pawls 81 and 82 have a vertical surface and an inclined surface.
Only rotation in one direction is transmitted.

Therefore, during rotation in the non-transmission direction, the passive coupling 76 escapes against the spring 78. For this reason, only the drive coupling 75 rotated by the disk 64 idles. The net dust remover 83 is formed of a leaf spring.

This net dust remover 83 has one end fixed to the non-ventilated portion 102 of the central support 99 of the filter frame 48 and the other end free. A free end of the net dust remover 83 is positioned opposite to the dust removal cam 71. A transducer 84 integrally formed is provided on the upper inner surface of the front surface of the net filter frame 48 . This receiver 84 is
It is positioned near the bottom of the dust removal cam 71. For this reason, the rotation of the dust removal cam 71 causes the net dust removal element 83 to be repelled and vibrate. During this vibration, the net dust remover 8
3 collides with the receiver 84 and generates impact vibration. next,
The shielding plate of this example will be explained in detail. Then, as shown in FIG. 3, 85 is a shielding plate that forms a detour passage 85a from the net filter 51 to the wavy main filter 56 at the upper rear part of the net filter frame 48.

This shielding plate 85 is non-ventilated and is fixed to the net filter frame 4-8 with screws. 91 is a member for fixing the net dust remover 83, which is connected to the shielding plate 85 and the hinge part 1.
They are integrally formed via 03.

The shielding plate 85 is placed between the net portion 51 on the front side of the net filter frame 48 and the main filter 56. The wave-shaped main filter 56 is placed so that the waves are in the vertical direction. A detour passage 85a formed above the shielding plate 85 is located behind the receiver 84.

Therefore, the airflow flowing through the detour passage makes it difficult for fine dust to adhere to the vicinity of the dust removal cam, thereby preventing fine dust from adhering.

Reference numeral 92 denotes a vibration transmitting body, which includes a main vibration transmitting body 93 having an inverted U shape as shown in FIG. 2, and auxiliary vibration transmitting bodies 94, 9.
Consists of 5.

The vibration transmitter 92 is integrally formed of ABS resin when the net filter frame 48 is molded, and is integrated with the pendulum 84.
The impact vibration applied to the net filter 51 is efficiently transmitted to the entire surface of the net filter 51. 96 and 97 are vibration transmitting bodies 9
The tip of No. 2 is a weight part that increases the vibration effect by the weight action, and also serves as a receiving part for the product ejection pin during molding work, and also acts as a vibration transmitter by the gas escape effect from the ejection pin part. This improves the moldability of 92.

Reference numeral 98 denotes a receiving boss for an extrusion pin provided on the vibration transmitting body 92. In order to prevent the vibration transmitting effect of the vibration transmitting body 92 from being inhibited, curved parts of the vibration transmitting body 92 are avoided, and straight parts or uniformly changing parts are It is set in.

As shown in FIG. 3, 114 is the terminal end of a rib provided on the back surface of the vibration transmitting body 92, which controls the deflection of the net dust remover 83 and prevents the net dust remover 83 from becoming excessive when the net filter 48 is taken out. This prevents it from being exposed to heat, deformation, or damage.

Reference numeral 99 denotes a central support body, and as shown in FIG. 2, a pendulum receiver 84 and a non-ventilated portion 102 are provided on this central support body 99.

115 is a fine dust outlet, which is close to the fine dust outlet 49;
It is provided in the lower part of the net filter frame 48 so as to communicate with a space defined by the net filter 51 and the shielding plate 85, and discharges fine dust accumulated in the space.

A fine dust storage chamber B is provided below the main filter 56 in the space of the dust case 2 defined by the shielding plate 85 and the frame portion 57 of the main filter 56.

[Effect]

Next, the operation based on the above embodiment will be described.

When the electric blower 10 is operated, airflow containing dust passes through the suction hose and flows into the coarse dust storage chamber A of the dust case 2 from the hose insertion port 43.

Upon inflow, the check valve 45 is opened by the airflow. However, when the electric blower 10 is stopped, the airflow disappears and the check valve 45 is automatically closed, so that the dust from inside the coarse dust storage chamber A does not return to the hose insertion port 43 side. Among the dust that enters the coarse dust storage chamber A along with the airflow, coarse dust is stored in the net 5.
1 and accumulates in the coarse dust storage chamber A.

Only the air current containing coarse dust passes through the net 51 and flows to the main filter 56 side, fine dust is captured by this main filter 56, and a part of the fine dust accumulates in the fine dust storage chamber B.

．． The airflow that has passed through the main filter 56 enters the suction chamber 38 from the suction port 40 and enters the electric blower 10 and the sound absorbing material 1.
8 and is exhausted from the exhaust port 16.

In addition to the above series of operations, the shielding plate will be described in more detail.

A part of the airflow that has passed through the net filter 51 is passed through the shielding plate 8
5 and flows backward through the net filter to the upstream side. At this time, the coarse dust adhering to the lower part of the net filter is peeled off and self-cleaning is performed.

Others are detour passages 85a located on the upper end side of the shielding plate 85.
and flows to the main filter 56 side. This airflow acts uniformly on the entire surface of the main filter 56 (,j
This is caused by the negative pressure caused by the main filter 56.
Since the non-ventilated part of the shielding plate 85 is placed opposite the central part of the shield plate 85, a large amount of airflow from the upper detour passage 85a descends from above to below, creating a downward flow.
Therefore, the surface of the main filter is self-cleaned and can be used for a long time.

Next, we will discuss how to remove coarse dust that adheres to the net filter.

The airflow containing dust is sucked from the suction port and goes into the dust case 2.
It enters inside and hits the net 51 of the net filter frame 48.

The airflow that hits the net filter 51 and the main filter 5
The peeling was promoted by the action of the shielding plate 85 arranged in parallel with the dust case 2 at an optimal distance between the dust case 2 and the dust case 2, and a part of the coarse dust settled due to the inertial dust collection effect. Afterwards, it is passed from below the front and sides to upwards from the front and sides. Here, the optimum distance between the net filter 51 and the shielding plate 85 is about 10 m. If it is lower than that, the apparent ventilation resistance of the net filter 51 increases and the airflow flows over the surface, resulting in a greater cleaning effect due to blowing, but pressure loss increases. Moreover, if the air flow exceeds this value, there will be no airflow flowing in parallel to the net 51 of the net filter frame 48, and only airflow will flow in the vertical direction, and the self-cleaning effect due to blowing will be lost. The applied airflow is directed to a detour passage 85 above the shielding plate 85.
The main filter 56 passes through the net filter 51 of the net filter frame 48 opposite to the detour path 85a.
flows into. The detour passage 85a is provided above the shielding plate 85 at a position facing the dust removal cam 71.

In this case, the airflow from the detour passage 85a flows through the main filter 56.
By concentrating the inflow to the side, dust is blown away and prevented from adhering to the dust removal cam. In addition, by repeating dust suction and dust removal, the dust is removed until the inside of the dust case 2 is full, and the coarse dust progresses to a state where it adheres to a point far from the dust removal action part of the net filter frame 48, which has a weak dust removal effect. Even if it re-deposit, the adhesion force of coarse dust is weak,
There is an advantage that a uniform dust removal effect can be guaranteed over the entire surface of the net filter 51. In this embodiment, the vacuum cleaner body has a structure divided into two parts, the main body case 1 and the dust case 2. However, the structure is not limited to this, and the main body case 1
The dust case 2 and the dust case 2 may be integrally molded.

〔Effect of the invention〕

Since the present invention has the above configuration, it has the following effects.

(B) A shielding plate is provided at a predetermined interval between the main filter and the net filter so as to cover all but the upper part of the net filter frame to form a detour passage to the main filter, so that the filter passes through the net filter. When a part of the airflow that collides with the shield plate flows backwards and passes through the net filter again, it blows away the coarse dust that has adhered to the net filter and performs self-cleaning, and the lower part of the net filter is cleaned to remove the coarse dust that has adhered to it. It can be prevented.

(b) Furthermore, the self-cleaning action allows a detour to the main filter to be maintained for a long period of time while the vacuum cleaner is in use, making it suitable for cleaning large areas.

(c) A large amount of air flows through the bypass passage from above to below the main filter, and has the effect of removing fine dust from the surface of the main filter.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view of the vacuum cleaner body, Fig. 2 is a perspective view of the net filter frame as seen from the outside, and Fig. 3 is a diagram of the net including the shielding plate. FIG. 3 is a perspective view of the filter frame as seen from the inside. 2...Dust case, 10...Electric blower, 43...Hose insertion port, 45...
・Check valve, 48...Net filter frame, 51...
... Net filter, 56 ... Main filter, 85 ... Shielding plate, 85a ... Detour passage.

Claims (1)

[Claims] 1. A dust case having a suction port and housing a net filter frame is removably provided in front of the main case equipped with an electric blower, and a wave-shaped main filter frame made of non-woven fabric is inserted into the net filter frame from behind. In the dust removal device for a vacuum cleaner in which a filter is inserted and fixed, a shielding plate is provided at a predetermined interval between the main filter and the net filter so as to cover the net filter frame except for the upper part thereof, and a detour to the main filter is provided. A dust removal device for a vacuum cleaner, characterized in that a passage is formed.