JP2004016606A - Electric vacuum cleaner - Google Patents

Abstract

The present invention provides a vacuum cleaner having a small, lightweight, easy-to-use suction body capable of obtaining a sufficient rotation torque of a rotary cleaning body and having a narrow front-rear width near an end of the suction body.
A rotary cleaning body is provided in a suction body, an electric motor for driving the rotation cleaning body, and a safety switch for automatically stopping rotation when the suction body is lifted. The safety switch 107 is located behind the rotary cleaning body 104, and is achieved by disposing the safety switch 107 substantially at the center in the left-right direction of the mouthpiece.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vacuum cleaner.
[0002]
[Prior art]
Among conventional vacuum cleaners, in a suction body that drives a rotary cleaning body with an electric motor, the motor and the rotation cleaning body are arranged before and after in a direction crossing the longitudinal direction of the suction body, and the electric motor is placed on either the left or right side of the suction body. In general, a pulley provided near the end of the rotary cleaner is connected to a pulley provided on the shaft of the electric motor and a pulley provided at the end of the rotary cleaning body using a belt.
[0003]
Further, the circuit board and the safety switch are arranged near an end opposite to the electric motor.
[0004]
However, in the above-mentioned conventional suction body, since a heavy electric motor is arranged at one end side of the suction body, the weight balance of the suction body in the left-right direction (the rotation axis direction of the rotary cleaning body) around the joint is not sufficient. Therefore, there is a problem that when the suction body is lifted with the extension pipe during cleaning, the suction body tilts toward the heavy motor side.
[0005]
Further, the front-rear width near the end of the mouthpiece is determined by the outer shape of the electric motor and the size of the safety switch disposed on the opposite side of the electric motor, and there is a problem that the width cannot be further reduced.
[0006]
A related one is JP-A-2002-125894, in which the arrangement of a rotary cleaning body, a motor for driving the cleaning body, and a circuit board has the general configuration described above.
[0007]
Further, as described in Japanese Patent Publication No. 7-36809, as a cooling means for the circuit board, an air intake port for sucking air into the circuit board is installed at the rear of the suction body (outer surface of the suction body), and the connection of the suction joint is performed. A mouthpiece having a hollow shaft on a side wall and configured to communicate with the substrate chamber via the hollow shaft has been proposed.
[0008]
[Problems to be solved by the invention]
In the above-mentioned conventional technology, the front-rear width near the left and right end portions of the mouthpiece is determined by the outermost shape of the electric motor or the size of the safety switch, and it is necessary to follow the larger one in consideration of left-right symmetry. For this reason, the front-rear width cannot be further reduced, and there is a problem that the mouthpiece is large and heavy.
[0009]
Also, for example, when a carpet is laid on the flooring, a step is formed in the state of the cleaning surface. If the floor detection wheel of the safety switch is placed at the boundary of the step, the wheel will protrude to the floor side, the safety switch will work, it will be the same as when lifting the mouthpiece, the rotating cleaning body will stop. As a result, there is a problem that the dust cannot be scraped up and the cleaning ability is reduced. In particular, since the safety switch is located at one end of the mouthpiece, it is unclear to which side of the mouthpiece the rotating position of the rotary cleaning member rotates, and there is a concern that the user may feel uncomfortable during operation.
[0010]
In addition, a gap is formed between the shaft of the floor detection wheel of the safety switch and the case that covers the shaft because the wheel shaft rotates. If the gap communicates with a vent for cooling the motor or the circuit board, fine dust may enter through the gap, and if accumulated, the detection wheel may not be able to operate normally.
[0011]
In the prior art described in Japanese Patent Publication No. 7-36809, the cooling air for the circuit components flows into the substrate chamber of the suction body from the air port outside the suction body, and then cools the circuit board to cool the connection tube. The air is exhausted into the connection cylinder through the hollow shaft, and guided to the vacuum cleaner together with the suction airflow from the suction port.
[0012]
Therefore, there is a problem that the amount of air for transporting dust from the cleaning surface is reduced by the amount of air flowing in from the outside, and the dust collecting ability is reduced.
[0013]
An object of the present invention is to solve these problems, maintain a small size and light weight, improve the torque of a rotating brush, and provide a vacuum cleaner with good dust collection performance.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, there is provided a cleaner body having an electric blower and a dust collector, and a suction body having an opening facing a surface to be cleaned and communicating with the dust collector, A rotary cleaning body in the mouthpiece, a motor for driving the rotary cleaning body, a circuit board for controlling the driving of the motor, a safety switch for automatically stopping rotation when the mouthpiece is lifted. In the provided vacuum cleaner, the electric motor and the safety switch are located behind the rotary cleaning body, and the motor and the safety switch are arranged at a substantially central portion of the rotary cleaning body in a rotation axis direction, and the electric motor and This is achieved by covering the safety switch with an electric motor pressing member and forming an upper portion of the electric motor pressing member with an air passage.
[0015]
The present invention is also achieved by providing a partition between the electric motor and the safety switch to form an electric motor room and a safety switch room.
[0016]
Further, an opening is provided in the vicinity of the circuit board and on the rear wall side of the rotary cleaning body chamber having the rotary cleaning body, and a convex member covering the opening is provided, and a side surface of the convex member is provided. This is attained by providing an opening at the bottom.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings of FIGS.
[0018]
FIG. 1 shows a plan view of the mouthpiece according to the present embodiment with a part cut away. In FIG. 1, reference numeral 101 denotes a mouthpiece lower case, 104 denotes a rotary cleaning body, 105 denotes a motor for driving the rotary cleaning body 104, 106 denotes a circuit board for controlling the driving of the motor 105, and 107 denotes a state when the suction body is lifted. A safety switch for automatically stopping the rotation of the motor; 108, a pulley on the motor side; 109, a large pulley that forms a reduction pulley; 110, a small pulley that forms a reduction pulley; 111, a connection between the large pulley 109 and the small pulley 110; Shafts, 112 and 113, bearings for rotating and holding the shaft 111; 114, a rotary cleaning body side pulley; 115, a first drive belt that bridges between the small pulley 110, the electric motor side pulley 108, and the large pulley 109; 116, a small pulley 110 Drive belt 117 extending between the rotary cleaning body side pulley 114 and This is a bearing holder for holding the receivers 112 and 113 and fixing them to the lower case 101.
[0019]
The electric motor 105 and the safety switch 107 are located behind the rotary cleaning body 104, and in this embodiment, the rotary cleaning body 104, the electric motor 105, and the safety switch 107 are arranged in this order from the front. In addition, the electric motor 105 and the safety switch 107 are arranged at a substantially central portion of the rotary cleaning body 104 in the axial direction.
[0020]
The rotating shaft of the rotary cleaning body 104, the rotating shaft of the electric motor 105, and the rotating shaft member of the safety switch 107 are arranged in parallel.
[0021]
Further, an opening 120 for cooling the circuit board is formed on the front side of the circuit board 106, that is, on the rear wall surface of the rotary cleaning body chamber, and a convex member 122 is attached so as to cover the opening 120. . Note that a filter 121 is provided between the opening 120 and the convex member 122 to prevent dust from entering through the opening 121.
[0022]
Further, the circuit board 106, the safety switch 107, and the electric motor 105 are connected by a lead wire disposed in the lower case 101.
[0023]
A transmission mechanism for transmitting the driving force generated by the electric motor 105 to the end of the rotary shaft of the rotary cleaning body 104 via a shaft 111 connecting the large pulley 109 and the small pulley 110 constitutes (means).
[0024]
Although not shown in FIG. 1, on the upper side of the lower case 101, the upper case is detachably provided to the lower case 101 so as to cover the rotary cleaning body 104. The upper body of the mouthpiece and the lower case 101 of the mouthpiece constitute a rotary cleaning body chamber in which the rotary cleaning body 104 is housed. Further, an opening 118 is formed on a surface of the lower case 101 opposite to the surface to be cleaned so that the rotating cleaning body 104 and the surface to be cleaned can come into contact with each other and to suck dust on the surface to be cleaned. I have.
[0025]
In FIG. 1, the direction along the rotation axis of the rotary cleaning body 104 is referred to as the left-right direction of the mouthpiece, and the left-right direction generally corresponds to the longitudinal direction of the mouthpiece. With respect to the up-down direction of the mouthpiece, the side where the opening 118 is formed in a state where the mouthpiece is placed on a horizontal floor is referred to as a lower surface side, and the opposite side is referred to as an upper surface side. In addition, a description will be given of a case where the side of the suction port in the traveling direction is the front side and the side of the suction port is the rear side.
[0026]
FIG. 2 shows an external view of a vacuum cleaner according to this embodiment. In FIG. 2, 201 has a built-in electric blower (not shown) for generating intake air necessary for the suction body main body to collect dust at the rear, and a dust collection chamber (not shown) for collecting dust at the front. ) Is connected to the vacuum cleaner main body 201, and a hose body formed so as to be able to move flexibly, 203 is connected to the hose body 202 and the vacuum cleaner main body 201, The handle grip has a built-in hand switch 204 for controlling the mouthpiece body 206 and has a flow path (not shown) communicating with the hose body 202 and the extension tube 205. The hose 202, the handle grip 203, and the extension tube 205 have a built-in power supply line (not shown) for supplying electricity to the mouthpiece main body 206.
[0027]
FIG. 3 is a plan view (bottom view) of the mouthpiece body according to the present embodiment when viewed from below. Reference numeral 118 denotes a floor opening provided in the lower case 101 of the suction body, which faces the surface to be cleaned. 301 is a bumper, 302 is a front wheel, and 303 is a rear wheel. Reference numeral 107 denotes a safety switch for automatically stopping when the suction body is lifted, and reference numeral 107a denotes a floor detection wheel for detecting whether the suction body is installed on the surface to be cleaned.
[0028]
FIG. 4 is a sectional side view of the center of the mouthpiece according to the present embodiment. Reference numeral 102 denotes a first connection pipe which is rotatable in a vertical direction with respect to the suction body, of a universal joint having an air passage communicating the inside of the suction body with the outside (the cleaner body). A second connecting pipe rotatable in the left-right direction with respect to the first connecting pipe; 401, a suction body upper case; 402, a rotary cleaning body upper case; 403, a rotary cleaning body chamber; And is also used as a member for fixing the safety switch 107. In addition, an upper portion of the motor holding member 405 has an air passage formed between the upper body 401 of the suction body and the air passage chamber 404 that connects the rotary cleaning body chamber 403 and the first connection pipe 102. Reference numeral 406 denotes a partition for partitioning between the electric motor 105 and the safety switch 107. The partition 406 is separated by a rib from the lower case 101 and a rib from the electric motor pressing member 405 to form a motor switch room and a safety switch room.
[0029]
FIG. 5 shows a plan view of the flow path of the mouthpiece according to the present embodiment. The electric motor 105 and the safety switch 107 are covered by the electric motor pressing member 405, and an upper portion thereof forms an air passage 404.
[0030]
FIG. 6 is an enlarged plan view around the circuit board of the mouthpiece according to the present embodiment. FIG. 7 is a sectional view taken along line AA of FIG.
[0031]
Next, the operation of this embodiment will be described. When the vacuum cleaner user operates the switch operation unit 204 disposed near the handle grip 203, the electric blower in the vacuum cleaner main body 201 operates in an operation mode according to the operated switch. The suction force generated by the electric blower reaches the mouthpiece 206 through the hose body 202 and the extension pipe 205. At the same time, power supplied from a power supply line provided in the hose body 202 and the extension tube 205 drives the electric motor 105 via the circuit board 106.
[0032]
The large pulley 109 is driven by the small pulley 108 attached to the shaft of the electric motor 105 and the first drive belt 115. At this time, by making the outer diameter of the large pulley 109 larger than the outer diameter of the small pulley 108, the rotation speed of the large pulley 109 becomes smaller than the rotation speed of the pulley 108 and the rotation torque increases.
[0033]
Then, the rotary cleaning body-side pulley 114 is driven by the small pulley 110 connected by the shaft 111 and the second drive belt 116. At this time, the rotational speed of the rotary cleaning body tooth pulley 114 becomes smaller than the rotational speed of the small pulley 110 due to the outer diameter of the small pulley 110, and the rotational torque further increases.
As described above, in the present embodiment, since the rotational torque of the rotary cleaning body can be increased, the rotary cleaning body can be rotated even when the load resistance from the surface to be cleaned such as a carpet with long hairs is large.
[0034]
Further, since the deceleration pulley is provided between the rotation shaft of the electric motor 105 and the rotation shaft of the rotary cleaning body 104, the front-rear width of the mouthpiece can be reduced.
[0035]
Further, the safety switch 107 is located behind the electric motor 105, is further disposed substantially at the center of the rotating shaft of the rotary cleaning body 104, and has a structure in which the circuit board 106 is disposed on the side opposite to the deceleration pulley side of the mouthpiece. Therefore, the front-rear width L near the left and right ends of the mouthpiece can be reduced.
[0036]
Therefore, it is easy to manage the mouthpiece, and it is possible to make the mouthpiece lighter as the front-rear width is reduced.
[0037]
In addition, since the electric motor 15 and the safety switch 107 are arranged near the center of the mouthpiece, the left-right balance of the mouthpiece is improved.
[0038]
In addition, since the safety switch 107 is located immediately behind the heavy electric motor 105, the rotary cleaning body rotates just by placing the suction body without pressing the suction body against the surface to be cleaned. Is reduced.
[0039]
In particular, in the case where the safety switch is provided on one of the left and right sides of the mouthpiece, if a carpet or the like is laid on the flooring and a step is formed on the surface to be cleaned, the floor of the safety switch 107 is provided on the step. When the surface detection wheel 107a is placed, the wheel 107a protrudes toward the floor surface. When the wheel 107a reaches a predetermined height, the limit switch is turned off, the power to the electric motor 105 is cut off, and the rotation of the rotary cleaning body 104 stops. .
[0040]
Therefore, dust cannot be scraped up, resulting in a state where the cleaning ability is reduced. For this reason, it is unclear which side of the mouthpiece is the position where the rotary cleaning member rotates, that is, where the position of the safety switch is located, and there is a concern that the user may feel uncomfortable during operation.
[0041]
On the other hand, in the present embodiment, since the safety switch 107 is disposed substantially at the center of the mouthpiece, the rotating position of the rotary cleaning body 104 is clear, and there is no discomfort during operation.
[0042]
On the other hand, the motor holding member 405 serves to fix the motor 105, serves to fix the safety switch 107, and has an air passage between the upper portion of the motor holding member 405 and the upper case 401. An air passage chamber 404 formed and communicating the rotary cleaning body chamber 403 and the first connection pipe 102 can be configured.
[0043]
As described above, one motor holding member plays three roles, so that the number of parts can be reduced, and cost and weight can be reduced.
[0044]
Further, by providing a partition 406 for partitioning between the electric motor 105 and the safety switch 107 from the mouth body lower case 101 and the electric motor pressing member 405, the electric motor room and the safety switch room can be formed.
[0045]
As a result, the safety switch room and the motor room become independent, and the safety switch 107 is located at the center of the mouthpiece, is separated from the circuit board 106, and has an opening 120 for cooling the circuit board 106. The air passage of the safety switch 107 is shut off, so that even if a gap is formed between the shaft of the floor detection wheel 107a of the safety switch 107 and the case that covers the shaft, even if there is a gap due to the rotation of the wheel shaft, the intrusion of fine dust due to the intake air is prevented. Since this can be prevented, the appearance of the floor detection wheel 107a is normally maintained. On the other hand, a communication passage for cooling is formed in the motor room.
[0046]
As shown in FIG. 6, a slit-shaped opening 120 for cooling the circuit board 106 is formed on the front side of the circuit board 106, that is, on the rear wall surface of the rotary cleaning body chamber. A convex member 122 is attached to cover.
[0047]
The opening 120 cools the circuit board 106 that controls the electric motor 105. However, another air port communicating with this opening is not provided.
[0048]
The pressure in the rotating cleaning body chamber varies depending on whether the suction body is lifted, the type of the surface to be cleaned, and the presence or absence of rotation of the rotating cleaning body. Due to this pressure fluctuation, the air in the rotary cleaning body chamber and the air around the circuit board 106 are exchanged at the opening 120, and the circuit board 106 is cooled.
[0049]
The convex member 122 is usually made of a rib-shaped member, but is formed in a plane parallel to the rear wall surface of the rotary cleaning body chamber to prevent dust from entering from the opening 121. Further, an opening is provided on the side surface of the convex member 122 (the suction port side at the center of the suction body).
[0050]
For this reason, the dust scraped up by the rotary cleaning body 104 is conveyed to the suction port at the center of the suction body while hitting the surface of the convex member 122, so that it is difficult for the dust to enter the opening 121. I have.
[0051]
Further, as shown in FIG. 7, since the opening (filter insertion direction) of the convex member 122 is formed in the rotation direction of the rotary cleaning body 104, that is, in the position opposite to the direction in which the dust is conveyed, Intrusion can be prevented.
[0052]
In addition, the air that has cooled the circuit board exits from the side surface of the convex member 122 and flows following the air that is sucked into the suction port at the center of the suction body, so that the cooling effect is not impaired.
[0053]
Furthermore, the cooled air also passes through the rotary cleaning body chamber and assists in the transfer of dust, so that the amount of air drawn in for cooling the circuit board 106 does not decrease.
[0054]
The filter 121 is provided between the opening 120 and the convex member 122 in consideration of the intrusion of dust.
[0055]
Therefore, with a simple shape, a small number of components, and an inexpensive structure, failure of the circuit board due to dust can be prevented, and the cooling effect can be maintained.
[0056]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, there is an effect that a suction body is small and lightweight, and the front-back width near the edge part of a suction body can be made thin and easy to use. Further, it is possible to prevent the failure of the circuit board due to dust and to maintain the cooling effect.
[Brief description of the drawings]
FIG. 1 is a plan view of a mouthpiece according to the present invention, with a portion cut away.
FIG. 2 is an external view of a vacuum cleaner according to the present invention.
FIG. 3 is a plan view when the mouthpiece body according to the present invention is viewed from below.
FIG. 4 is a central side sectional view of a mouthpiece according to the present invention.
FIG. 5 is a plan view of a flow path of the mouthpiece according to the present invention.
FIG. 6 is an enlarged plan view around a circuit board of the mouthpiece according to the present invention.
FIG. 7 is a sectional view taken along line AA of FIG. 6;
[Explanation of symbols]
Reference numeral 101: suction body lower case, 104: rotary cleaning body, 105: electric motor, 106: circuit board, 107: safety switch, 120: opening, 122: convex member, 206: suction body, 301: suction body upper case, 405 … Motor holding member, 406… Partition wall

Claims (5)

A cleaner body having an electric blower and a dust collecting unit, a suction body having an opening facing the surface to be cleaned and communicating with the dust collecting unit, wherein a rotary cleaning body is provided in the suction body; A motor for driving the cleaning body, a circuit board for controlling the driving of the motor, a vacuum cleaner equipped with a safety switch for automatically stopping the rotation when lifting the mouthpiece,
The electric vacuum cleaner wherein the electric motor and the safety switch are located behind the rotary cleaning body, and the motor and the safety switch are arranged at a substantially central portion of the rotary cleaning body in a rotation axis direction. A cleaner body having an electric blower and a dust collecting unit, a suction body having an opening facing the surface to be cleaned and communicating with the dust collecting unit, wherein a rotary cleaning body is provided in the suction body; A motor for driving the cleaning body, a circuit board for controlling the driving of the motor, a vacuum cleaner equipped with a safety switch for automatically stopping the rotation when lifting the mouthpiece,
The electric motor and the safety switch are located behind the rotary cleaning body, and the motor and the safety switch are arranged at a substantially central portion of the rotary cleaning body in the rotation axis direction, and the motor and the safety switch are held by a motor pressing member. And an air passage formed above the electric motor pressing member. In claim 1 or 2,
A vacuum cleaner, wherein a rotating shaft of the rotating cleaning body, a rotating shaft of the electric motor, and a rotating shaft member of the safety switch are arranged in parallel. In claim 1 or 2,
A vacuum cleaner, wherein a partition is provided between the electric motor and the safety switch to form an electric motor room and a safety switch room. A cleaner body having an electric blower and a dust collecting unit, a suction body having an opening facing the surface to be cleaned and communicating with the dust collecting unit, wherein a rotary cleaning body is provided in the suction body; A motor for driving the cleaning body, a circuit board for controlling the driving of the motor, a vacuum cleaner equipped with a safety switch for automatically stopping the rotation when lifting the mouthpiece,
Providing an opening in the vicinity of the circuit board and on the rear wall side of the rotary cleaning body chamber having the rotary cleaning body, installing a convex member covering the opening, Vacuum cleaner characterized by having an opening on the side.

Images