JP7228463B2 - vacuum cleaner - Google Patents

Description

An embodiment of the present invention relates to a vacuum cleaner using a secondary battery as a power source.

Among vacuum cleaners that use a secondary battery as a power source, there is known one in which the secondary battery is charged in a state in which the main body is supported on a charging stand and the air passage including the hose connected to the main body is kept upright. . When charging the secondary battery, the commercial AC power supply is converted to direct current using an AC adapter or the like, and the voltage is boosted to a predetermined voltage by a boost converter and supplied to the secondary battery. A switching circuit is generally used as the boost converter. As described above, if the air duct is in an upright state during charging on the charging stand, there is a risk that the switching noise generated in the switching circuit will be radiated as radiation noise from the current path of the air duct in the upright state. be.

Japanese Patent Application Laid-Open No. 2019-295

A problem to be solved by the present invention is to provide a vacuum cleaner that can prevent radiation noise during charging of a secondary battery.

A vacuum cleaner according to an embodiment includes a main body in which a secondary battery and an electric blower powered by the secondary battery are arranged, an air passage body, an electricity supply path, and a cutoff means. The air channel body is fluidly connected to the air channel within the body. The air passage body is elongated and has a hand circuit portion that is provided with setting means and that is powered by a secondary battery and generates a signal for setting the operation of the electric blower according to the operation of the setting means . The energization path is provided from the secondary battery of the main body to the hand circuit portion of the air passage body . The energization path supplies electric power from the secondary battery to the hand circuit section, and passes a signal from the hand circuit section. The cutoff means cuts off power supply to the hand circuit unit by cutting off the current path when the secondary battery is charged by the external power supply.

(a) is an explanatory diagram showing a part of the internal structure of the vacuum cleaner according to the embodiment when in use, and (b) is an internal structure of the vacuum cleaner according to the embodiment when the secondary battery is charged. It is an explanatory view showing a part. It is an explanatory view showing an internal structure of a vacuum cleaner of one embodiment. It is a perspective view showing a vacuum cleaner of one embodiment. It is a perspective view showing a part of the main body of the vacuum cleaner of one embodiment. It is a perspective view which shows the charging stand which mounts|wears with the vacuum cleaner of one Embodiment. It is a perspective view which shows the state which mounted|wore the charging stand with the vacuum cleaner of one Embodiment. (a) is an explanatory diagram schematically showing a conductive state of an example of the blocking means of the vacuum cleaner of one embodiment, and (b) is a schematic diagram of a blocking state of an example of the blocking means of the vacuum cleaner of one embodiment. It is an explanatory diagram showing. (a) is an explanatory view schematically showing the continuity state of another example of the breaking means of the vacuum cleaner of one embodiment, and (b) is the breaking state of another example of the breaking means of the vacuum cleaner of one embodiment. It is an explanatory view showing typically. (a) is an explanatory view schematically showing the conduction state of still another example of the blocking means of the vacuum cleaner of one embodiment; (b) is a diagram of still another example of the blocking means of the vacuum cleaner of one embodiment It is an explanatory view showing a cutoff state typically.

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

In FIG. 3, 1 indicates a vacuum cleaner. A vacuum cleaner 1 includes a main body 2 capable of traveling on a floor, which is a surface to be cleaned, and an air passage body 3 mechanically and fluidly connected to the main body 2 . The vacuum cleaner 1 is a floor traveling type or canister type vacuum cleaner.

The vacuum cleaner 1 includes an electric blower 4 and a dust collector 5. The electric vacuum cleaner 1 is a vacuum cleaner that sucks dust into a dust collection section 5 via an air passage body 3 by driving an electric blower 4 and collects the dust. The electric blower 4 is arranged on the main body 2 .

The air passage body 3 forms a suction air passage that communicates with the suction side of the electric blower 4 via the dust collector 5 . Air passage body 3 includes hose 7 at least in part. In this embodiment, the air passage body 3 includes a hose 7 , an extension pipe 8 that is a straight pipe portion, and a suction port body 9 . The air passage body 3 is connected to the front portion of the main body 2 .

The hose 7 has flexibility. The hose 7 is an elongated cylinder. The hose 7 is connected to the main body 2 at its downstream end, which is one end. At the upstream end, which is the other end of the hose 7, a handheld operation portion 11 is arranged. The hand operation portion 11 is a portion that is held by the user during the cleaning operation. A setting means 12 such as a switch for setting the operation of the electric blower 4 or the like by the user is arranged in the hand operation portion 11 . A hook portion 13 may be formed on the hand operation portion 11 so that a holding portion 14 attached to the hose 7 can be hooked. A downstream end, which is one end of an elongated extension tube 8 , is connected to the hand operation unit 11 . A suction port body 9 is connected to the upstream end, which is the other end of the extension pipe 8 .

An electric part 15 is arranged in the suction port body 9 . In this embodiment, the electric part 15 is a motor that rotates a rotary cleaning body 16 that is rotatably arranged in the suction port body 9 . The operation of the electric portion 15 is controlled by drive control means 17 arranged in the suction port body 9 . The drive control means 17 sets the starting and stopping of the electric portion 15 according to the operation of the setting means 12 by the user.

The main body 2 is provided with control means 18 for controlling the operation of the electric blower 4 and the like in accordance with user's settings. The control means 18 sets the starting and stopping of the electric blower 4, the suction force of the electric blower 4, etc., according to the operation of the setting means 12 by the user.

A secondary battery 20 is also arranged in the main body 2 . The secondary battery 20 is a power source that supplies power to at least the electric blower 4 . That is, the vacuum cleaner 1 is a cordless vacuum cleaner that uses the secondary battery 20 as a power source.

The secondary battery 20 can be charged via a body connection terminal 21 provided on the body 2 and shown in FIG. In this embodiment, the body connection terminals 21 are arranged at the rear part of the body 2 or the like.

When charging the secondary battery 20, the vacuum cleaner 1 is placed on the charging stand 25 shown in FIGS. The electric vacuum cleaner 1 and the charging base 25 constitute an electric cleaning system CS.

The charging stand 25 includes a first support portion 27 that supports the main body 2 and a second support portion 28 that supports the air passage body 3 . In this embodiment, the first support portion 27 supports the main body 2 from below. A charging base connection terminal 30 connected to the main body connection terminal 21 (FIG. 4) of the main body 2 is arranged on the first support portion 27 . The charging stand connection terminal 30 is electrically connected to the charging circuit 31 shown in FIG. 2 and the like. The charging circuit 31 is a switching circuit that converts voltage by switching a switching element. In this embodiment, the charging circuit 31 is a boost converter. The charging circuit 31 may be arranged on the charging stand 25 or may be arranged on the main body 2 of the vacuum cleaner 1 . In this embodiment, the charging circuit 31 is arranged in the main body 2 . Also, the charging stand connection terminal 30 can be connected to an external power source e such as a commercial AC power source via a power cord 32 . The power cord 32 is provided with an AC adapter 33 which is a converter for AC/DC conversion.

Moreover, in this embodiment, the second support portion 28 shown in FIGS. 5 and 6 hooks and holds the air passage body 3 . The second support portion 28 is formed in the shape of a pocket that opens upward, and the held portion 35 (FIG. 3) arranged in the air passage body 3 is inserted and held from above. The held portion 35 shown in FIG. 3 is arranged at one end portion of the extension pipe 8, the suction port body 9, and the like.

Furthermore, in this embodiment, as shown in FIGS. 5 and 6, the charging stand 25 includes a guide portion 37 that is a projecting portion. The guide portion 37 serves as a guide when the main body 2 and the air passage body 3 are attached to and detached from the first support portion 27 and the second support portion 28 . Further, the guide portion 37 prevents the main body 2 attached to the first support portion 27 from falling. The guide portion 37 extends upward with respect to the first support portion 27 . A second support portion 28 is arranged on the side opposite to the main body 2 with respect to the guide portion 37 . In this embodiment, the second support portion 28 is arranged on the upper portion of the surface of the guide portion 37 opposite to the main body 2 . The main body 2 is positioned on one side with the guide portion 37 interposed therebetween, and a part of the air passage body 3 is positioned on the other side.

Next, the electrical configuration of the vacuum cleaner 1 will be described.

As shown in FIG. 2, in the vacuum cleaner 1, a control means 18 and a secondary battery 20 are connected. Control means 18 and secondary battery 20 are each connected to charging circuit 31 at least in a charged state. The charging circuit 31 is connected to the main body connection terminal 21 .

Also, the control means 18 and the secondary battery 20 are connected to the electric blower 4 . Further, the control means 18 and the secondary battery 20 are connected to the hand circuit part 40 arranged in the hand operation part 11 , the electric part 15 arranged in the inlet body 9 and the drive control means 17 . In other words, the hand circuit section 40, the electric section 15, and the drive control means 17 are power-supplied sections to which power is supplied from the secondary battery 20, respectively. The hand circuit section 40 includes the setting means 12 .

A first wiring 42 and a second wiring 43, which are wirings, are connected to the control means 18 and the secondary battery 20, respectively. The first wiring 42 and the second wiring 43 are arranged from the main body 2 to the air passage body 3 respectively. At least a part of the first wiring 42 and the second wiring 43 is arranged inside the hose 7 . The inside of the air passage body 3 or the hose 7 means a portion outside the intake air passage formed by the air passage body 3 or the hose 7 and covered with the outer shell portion forming the air passage body 3 or the hose 7 . The first wiring 42 and the second wiring 43 are insulated from each other inside the hose 7 and arranged in a double helix.

The first wiring 42 is, for example, a signal line that communicates between the control means 18 and the hand circuit section 40 and the drive control means 17 . The second wiring 43 is, for example, a power line that supplies electric power between the secondary battery 20 and the hand circuit section 40, the drive control means 17, and the electric section 15. FIG. The first wiring 42 and the second wiring 43 are provided with connecting portions at the connecting positions of the main body 2 and the air duct 3 when the air duct 3 is detachable from the main body 2 . To clarify the explanation, one first wiring 42 and one second wiring 43 are shown in the drawing, but they may be singular or plural.

In the illustrated example, the hand circuit unit 40 is connected to a third wiring 45 branched from the first wiring 42 and a fourth wiring 46 branched from the second wiring 43, thereby connecting the first wiring 42 and the second wiring 43 .

The first wiring 42 , the second wiring 43 , the third wiring 45 , and the fourth wiring 46 constitute a current-carrying path 48 extending from the main body 2 to the power-supplied portion of the air passage body 3 . Electric power is supplied from the main body 2 to the hand circuit section 40, the drive control means 17, and the motorized section 15 via the energization path 48, and signals for controlling the electric blower 4 and the motorized section 15 are communicated.

The current-carrying path 48 is provided with a cut-off means 50 as a current prevention means. The interrupting means 50 allows the energization path 48 to be electrically interrupted between one end side and the other end side of the interrupting means 50 . The interrupting means 50 interrupts the conducting path 48 at least when the secondary battery 20 is charged, so that current does not flow to the air passage body 3 side. It is preferable that the cut-off means 50 be provided at a position close to the main body 2 in the current-carrying path 48 . The blocking means 50 of this embodiment are arranged inside the main body 2 . In addition, although the interrupting means 50 of the present embodiment are arranged on the first wiring 42 and the second wiring 43, respectively, the interrupting means 50 is connected to one of the first wiring 42 and the second wiring 43 in the conducting path 48. , for example, may be arranged only on the second wiring 43 which is a power line.

As the interrupting means 50, a mechanical switch such as a microswitch or an electrical switch such as a transistor or FET is preferably used.

The shut-off means 50 using a mechanical switch may be operated by an operation unit located outside the vacuum cleaner 1 or may be operated by the attitude of the vacuum cleaner 1 or the main body 2 or the like. 7(a) and 7(b), for example, the cut-off means 50 using a mechanical switch is arranged inside a recess or a hole provided in the rear part of the main body 2, and the charging base 25 When not attached to the charging base 25, the normally closed blocking means 50 (FIG. 7(a)) is attached to the charging base 25. By inserting and pushing the blocking means 50, the blocking means 50 may be opened (FIG. 7(b)) to block the conducting path 48 (FIG. 2), or FIGS. ), a pendulum-shaped contactor 50a and a terminal 50b capable of slidable contact with the contactor 50a are placed on the main body 2, and the main body 2 is placed on the floor during normal use. The contactor 50a and the terminal 50b are brought into contact with each other and closed (FIG. 8(a)). may be opened apart from the terminal 50b (FIG. 8(b)) to cut off the conducting path 48 (FIG. 2).

Also, the cutoff means 50 using an electric switch is switched according to the signal from the control means 18, as shown in FIGS. 9(a) and 9(b), for example. In the illustrated example, the control means 18 monitors the state of charge of the secondary battery 20 based on the output from the charging circuit 31 to the secondary battery 20, and outputs a signal to switch the cutoff means 50 according to the monitoring result. do. That is, the control means 18 detects the output from the charging circuit 31 to the secondary battery 20, and determines whether or not the charging circuit 31 is charging the secondary battery 20 based on the detected value. Then, when the control means 18 detects the charging state of the secondary battery 20 by the charging circuit 31, it outputs a signal to the blocking means 50 to open the blocking means 50. FIG. Thus, in this embodiment, the control means 18 has the function of charge detection means for detecting that the secondary battery 20 is in a charged state. The detection of the state of charge of the secondary battery 20 by the control means 18 is not limited to the detection value of the output from the charging circuit 31 to the secondary battery 20. Any detection of insertion, detection of input at the main body connection terminal 21, or the like may be performed.

It is not limited to this, and includes either mechanical charge detection means or electrical charge detection means for detecting that the secondary battery 20 is in a charged state, cutoff means 50 which is a mechanical switch, and an electrical switch. Any one of the blocking means 50 may be combined arbitrarily. For example, if the mechanical switches or the like shown in FIGS. 7(a) and 7(b) or FIGS. The control means 18 may output a signal to the blocking means 50 in response to detection by a mechanical switch used as a detection means. Further, as means for detecting the attitude of the main body 2, an acceleration sensor, a gyro sensor, or the like may be used.

Next, the operation of one embodiment will be described.

During cleaning, the cut-off means 50 is in a state of conducting the current-carrying path 48, as shown in FIG. 1(a). When the user operates the setting means 12 of the hand operation section 11, a signal corresponding to the operation is transmitted from the hand circuit section 40 to the control means 18 through the first wiring 42, and the control means 18 is controlled by the secondary signal according to the signal. The amount of electricity supplied from the battery 20 to the electric blower 4 is controlled, and the operation of the electric blower 4 is turned on and off, and the suction force or driving force is set. While the electric blower 4 is in operation, the user grasps the hand operation part 11 and pulls the main body 2 through the air passage body 3 to move it to a desired position on the floor surface. The dust is sucked in together with the air and accumulated in the dust collecting part 5. - 特許庁Further, when the user operates the setting means 12 of the hand operation unit 11 in order to operate the rotary cleaning body 16 according to the type of floor surface, etc., a signal corresponding to the operation is sent from the hand circuit unit 40 to the third terminal. A signal transmitted to the control means 18 through the wiring 45 and transmitted from the control means 18 in response to the signal of the hand circuit unit 40 is transmitted to the drive control means 17, and the drive control means 17 is controlled by the secondary battery according to the signal. It controls the amount of energization from 20 to the electric part 15, and sets the ON/OFF of the operation of the electric part 15. The rotating cleaning body 16 is rotated by the operation of the electric part 15, and the rotating cleaning body 16 scrapes dust from the floor surface.

When charging the secondary battery 20, the user mounts the vacuum cleaner 1 on the charging base 25. - 特許庁The main body 2 is mounted on the charging base 25 by placing the main body 2 from above on the first support portion 27 along the guide portion 37 with the front portion facing upward and the rear portion facing downward, and connecting the main body connection terminal 21 and the charging terminal 21 to each other. The base connection terminals 30 are electrically connected to each other. At this time, if the cutoff means 50 is a mechanical switch shown in FIGS. 7(a) and 7(b) or FIGS. Triggered by the mounting state of , as shown in FIG.

The air passage body 3 is attached to the charging base 25 by inserting the held portion 35 into the second supporting portion 28 of the charging base 25 from above. In this state, as shown in FIG. 6, the air passage body 3 is supported with the extension pipe 8 extending upward from the second support portion 28, and is connected between the main body 2 and the extension pipe 8. The hose 7 extends upward from the main body 2 along the extension tube 8 and is folded back at or near the connection position with the hand operation portion 11 . That is, the air passage body 3 is supported in an upright state on the charging stand 25 so that the hand operation portion 11 or the folded portion of the hose 7 is at the top. At this time, in the present embodiment, the hose 7 is held at a position close to the extension pipe 8 by hooking the holding portion 14 on the hook portion 13 .

By connecting the power cord 32 to the external power source e, the charging stand 25 supplies the charging circuit 31 with a voltage converted to direct current by the AC adapter 33 . The charging circuit 31 boosts this voltage and supplies it to the secondary battery 20 to charge the secondary battery 20 . When the interrupting means 50 is an electrical switch, the control means 18 detects the output from the charging circuit 31 to the secondary battery 20, and the secondary battery 20 is in a charging state as a trigger, and the control means 18 outputs a signal to the cutoff means 50, and the cutoff means 50 is opened to cut off the conducting path 48 as shown in FIG. 1(b).

The secondary battery 20 is charged by the charging circuit 31 in a state in which current does not flow to the air passage body 3 side via the first wiring 42 or the second wiring 43 by cutting off the current-carrying path 48 . The charging circuit 31 monitors the voltage of the secondary battery 20, and terminates charging when the voltage of the secondary battery 20 reaches or exceeds a predetermined voltage.

It should be noted that the interrupting means 50, after interrupting the current-carrying path 48, makes the current-carrying path 48 conductive again when the secondary battery 20 is not in a charged state. For example, in a state where the control means 18 does not detect the output from the charging circuit 31 to the secondary battery 20, the secondary battery 20 is determined not to be in a charged state, and the control means 18 outputs a signal to the cutoff means 50. Then, as shown in FIG. 1(a), the interrupting means 50 is closed and the interruption of the energization path 48 is cancelled. Further, for example, when the blocking means 50 is a mechanical switch as shown in FIGS. 7(a) and 7(b) or FIGS. 8(a) and 8(b), is removed from the charging base 25, or the main body 2 is placed on the floor for use, the interrupting means 50 is closed and the interruption of the current path 48 is released as shown in FIG. 1(a).

In this way, by providing the interrupting means 50 for interrupting the conduction path 48 when the secondary battery 20 is charged by the external power source e, the radiation noise caused by the switching noise generated by the charging circuit 31 during charging of the secondary battery 20 is prevented from being blown out. Diffusion from the road body 3 can be prevented. Further, since it is only necessary to additionally install the interrupting means 50, a large design change or the like is unnecessary, and the configuration can be simplified.

In this embodiment, the air passage body 3 is arranged so as to extend upward from the main body 2 mounted on the charging stand 25 so that it can be installed in a space-saving manner when the secondary battery 20 is charged. Therefore, it can be said that the current-carrying path 48 at a position higher than the floor acts like an antenna, and the radiated noise is likely to diffuse away from the current-carrying path 48 . Therefore, in the present embodiment, at least when the secondary battery 20 is in a charged state, the blocking means 50 prevents the current from flowing to the air passage body 3 side, thereby enabling space-saving installation when the secondary battery 20 is charged. In addition, it is possible to prevent diffusion of radiation noise caused by switching noise or the like that occurs when the secondary battery 20 is charged.

When the charge detecting means detects that the secondary battery 20 is in a charged state, the interrupting means 50 interrupts the conducting path 48, so that the conducting path 48 is reliably interrupted by the interrupting means 50 when the secondary battery 20 is charged. It is possible to reliably prevent current from flowing to the air duct 3 side during charging, and to reliably prevent radiation noise caused by switching noise generated by the charging circuit 31 from diffusing from the air duct 3 .

By operating the interrupting means 50 in conjunction with the attachment of the main body 2 to the charging base 25, the energization path 48 can be reliably interrupted by the interrupting means 50 before charging of the secondary battery 20 is started. It is possible to reliably prevent current from flowing to the air duct 3 side during charging, and to reliably prevent radiation noise caused by switching noise generated by the charging circuit 31 from diffusing from the air duct 3 .

The interrupting means 50 interrupts the current path 48 in the main body 2, so that the voltage from the charging circuit 31 side is applied to the portion of the first wiring 42 and the second wiring 43 located in the air path body 3 in the current path 48. Since it is possible to reliably cut off the current so as not to apply it, it is possible to reliably prevent the radiation noise caused by the switching noise generated by the charging circuit 31 from diffusing from the portion of the current path 48 located at the air passage body 3 .

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention to these embodiments. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

1 vacuum cleaner 2 main body 3 air passage body
4 electric blower
12 setting means
18 Control means with charging detection means functions
20 secondary battery
25 charging station
40 hand circuit part
48 Power path
50 Breaking means e External power supply

Claims (6)

a main body in which a secondary battery and an electric blower powered by the secondary battery are arranged;
A hand circuit unit fluidly connected to the air passage in the main body, provided with setting means, and powered by the secondary battery to generate a signal for setting the operation of the electric blower according to the operation of the setting means. an elongated air passage body;
It is provided from the secondary battery of the main body to the hand circuit portion of the air passage body , and supplies electric power from the secondary battery to the hand circuit portion and passes a signal from the hand circuit portion. an energization path;
a cutoff means for cutting off power supply to the hand circuit unit by cutting off the energization path when the secondary battery is charged by an external power supply;
A vacuum cleaner comprising: When the secondary battery is not in a charging state, the cutoff means conducts the current path to supply power from the secondary battery to the hand circuit unit.
The electric vacuum cleaner according to claim 1, characterized in that: The main body is attached to a charging stand when charging the secondary battery,
The electric vacuum cleaner according to claim 1 or 2, wherein, in a state where the main body is attached to the charging stand, the air passage body extends upward from the main body with the main body serving as a lower portion. A charge detection means for detecting that the secondary battery is in a charged state,
The electric vacuum cleaner according to any one of claims 1 to 3, wherein the cutoff means cuts off the energization path when the charge detection means detects that the secondary battery is in a charged state. . The electric vacuum cleaner according to claim 3 , wherein the interrupting means interrupts the current-carrying path in conjunction with mounting of the main body on the charging stand. The electric vacuum cleaner according to any one of claims 1 to 5 , wherein the interrupting means interrupts the current-carrying path within the main body.

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