JPH04327817A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To stabilize the turning movement of a turning body and to stabilize the electrical connection of the turning body. CONSTITUTION:A turning body 61 is provided with a first and second planar ring-mounting portions 74,76 both of which extend in the direction of the outside diameter of the body 61. A stepped level portion 75 is provided between both of the ring mounting portions 74,76. A supporting portion 80 is provided which is fitted over the outer face of the stepped level portion 75 to support the stepped level portion 75 in such a way as allowing the portion 75 to freely turn. The turning body 61 is supported at the large diameter side, i.e., the stepped level portion 75 so that the influence of dispersion of the accuracy of sizing of the turning body 61 and the support portion 80 is reduced.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner in which a hose connected to a main body of the vacuum cleaner is rotatably connected electrically.

0003

2. Description of the Related Art In this type of vacuum cleaner, as shown in FIG. A rotating body 5 having a suction port 4 communicating with the chamber 2 is rotatably provided. The rotating body 5 holds the hose connected to the suction port 4 and electrically connects the cleaner body 1 side and the hose side.

[0004] The electrical connection to the hose is for supplying power to the motor that rotates the rotating brush of the suction port connected to the hose via an extension pipe, and for transmitting control signals to the hand control unit at the end of the hose. There is.

[0005] The rotating body 5 is provided with an annular first ring attachment part 6 which is planar in the outer diameter direction of the suction port 4.
A cylindrical second ring attachment part 7 is provided in the axial direction from the outer end of the first ring attachment part 6. A pair of sliding rings 8 of different diameters are attached to the first ring attachment part 6 to be electrically connected to the motor on the hose side, and a pair of sliding rings 8 with different diameters are attached to the second ring attachment part 7 to be electrically connected to the hand control part on the hose side. A pair of sliding rings 9 are attached which are connected to the. An annular sliding portion 10 is formed in the first ring mounting portion 6 and located between a pair of sliding rings 8 .

The cleaner body 1 is also provided with a support portion 11 that fits into the sliding portion 10 and supports it rotatably. Fixed terminals (not shown) on the cleaner main body 1 side are provided on the cleaner body 1 side to be slidably pressed into contact with each pair of sliding rings 8 and 9 of the first ring attachment part 6 and the second ring attachment part 7, respectively.

[0007]

[Problems to be Solved by the Invention] As described above, in the conventional vacuum cleaner, the rotary body 5 is rotatably fitted and supported at the middle part of the first ring attachment part 6, which is relatively difficult for suction. Mouth 4
Since it is on the small diameter side close to , even slight variations in the dimensional accuracy of the rotating body 5 and the support portion 11 are likely to be affected. In other words, even a slight variation in dimensions may cause the rotary body 5 to fit tightly and become difficult to rotate, or cause a gap to occur in the fit of the rotary body 5, resulting in rattling. In particular, the rotating body 5
When rattling occurs, the position of the rotating body 5 is displaced, and the contact state between the sliding rings 8 and 9 and the fixed terminal becomes unstable. Therefore, management of high dimensional accuracy is required.

The present invention has been made in view of the above points, and reduces the influence of variations in dimensional accuracy of the rotating body and the support portion that rotatably supports the rotating body, and improves the rotation of the rotating body. It is an object of the present invention to provide a vacuum cleaner that can stabilize the movement and the electrical connection state.

[Configuration of the invention]

0010

[Means for Solving the Problems] The present invention provides a vacuum cleaner body with a dust collection chamber, a built-in electric blower that communicates with the dust collection chamber, and a suction port that communicates the dust collection chamber with the outside. In a vacuum cleaner in which a movable body is rotatably provided, the rotary body holds a hose connected to a suction port of the rotary body, and electrically connects the vacuum cleaner main body side and the hose side, the rotary body has a , a planar annular first ring attachment part and a second ring attachment part larger in diameter than the first ring attachment part are provided in the outer diameter direction of the suction port;
An axial step is provided between the ring attachment part and the second ring attachment part, and a pair of rings with different diameters are electrically connected to the hose side at the first ring attachment part and the second ring attachment part. A sliding ring is attached to each of the cleaning rings, and the vacuum cleaner main body is provided with a support portion that fits into a stepped portion of the rotating body to rotatably support the rotating body, and the first ring mounting portion and Each pair of fixed terminals is provided to be electrically connected to each pair of sliding rings of the second ring mounting portion in a slidable manner.

[0011]

[Operation] In the present invention, the step portion provided on the relatively large diameter side between the first ring attachment portion and the second ring attachment portion of the rotating body fits into the support portion of the vacuum cleaner body. , this step portion rotates while sliding on the support portion. A fixed terminal on the vacuum cleaner body comes in contact with a pair of sliding rings on each ring attachment part separated by a step and is electrically connected, and by the rotation of the rotating body,
Each fixed terminal slides in contact with each sliding ring and maintains an electrically connected state.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In FIG. 1, 21 is a vacuum cleaner main body, and this vacuum cleaner main body 21 has an upper case 22 and a lower case 2.
3, and a lid 24 provided on the front upper surface of the upper case 22 so as to be openable and closable.

Inside the vacuum cleaner body 21, a dust collection chamber 33 and an electric blower chamber 3 are separated by a partition wall 32 having lattice holes 31.
4 are divided into front and rear sections, and an exhaust chamber 36 communicating with an exhaust port 35 is formed at the rear of the electric blower chamber 34 .

A dust collection bag holder 37 is provided in the upper part of the dust collection chamber 33, and a mouth frame 39 of a dust collection bag 38 is detachably held in the dust collection bag holder 37. Further, the electric blower chamber 34 houses an electric blower 40 whose suction side communicates with the dust collection chamber 33 and whose exhaust side communicates with the exhaust chamber 36 .

The lid body 24 has an outer shell composed of a lid cover 41 and a back plate 42 fixedly attached to the lower side, that is, the back side of the lid cover 41. For example, a rear end portion of the lid cover 41 is supported by the upper case 22 via a fulcrum portion 43 so as to be vertically movable. In addition, the lid body 24
A clamp 44 that releasably engages the lower case 23 is provided at the front end to hold the lower case 23 in a closed state.

Further, the lid cover 41 and the back plate 42 are formed with an outer opening 45 and an inner opening 46, respectively, which face each other. A box-shaped rotating body cover 47 with an open bottom is disposed within the lid body 24 between the openings 45 and 46 . This rotary body cover 47 is sandwiched and fixed between the lid cover 41 and the back plate 42, and an opening 49 is provided in an upper surface portion 48 formed in a spherical shape. A protrusion 51 that guides the sliding movement of a shutter 50 that opens and closes the opening 49 is provided along the front-rear direction, and an annular fitting portion 52 is formed at the lower edge of the opening 49 .

A rotating body 61 is also provided in the rotating body cover 47.
is rotatably arranged. This rotating body 61 is shown in FIG.
As also shown in FIG. 3, the mouth frame member 62 and the connection frame member 63 are fitted from above and below through an annular packing 64, and a plurality of screws 65 are screwed into the connection frame member 63 through the mouth frame member 62. A suction port 66 to which a hose is inserted and connected is formed in the center.

The mouth frame member 62 has a stepped portion 67 on the upper peripheral edge thereof which is slidably fitted into the fitting portion 52 of the rotating body cover 47.
is formed, and a rotating body cover 47 is formed outside of this stepped portion 67.
A disc portion 68 is formed to slidably abut on the back surface of the holder. Further, a cylindrical connecting pipe portion 69 that constitutes the suction port 66 is formed in the center of the mouth frame member 62, and this connecting pipe portion 69
A packing 64 is in pressure contact with the lower end of.

Furthermore, as shown in FIG.
A groove 70 communicating with the suction port 66 is formed on the front side of the
A pair of terminals 71 connected to the hose terminals are provided on both sides of the groove 70, and a pair of terminals 72 connected to the hose terminals are provided behind the suction port 66. Note that the terminal 71 is for transmitting a control signal to the hand operation section of the hose, and the terminal 72 is for supplying power to a motor that rotationally drives a rotating brush of a suction port connected to the hose via an extension tube.

On the other hand, the connection frame member 63 has a packing 64
A cylindrical portion 73 that fits on the outer periphery of the cylindrical portion 73 is formed, and an annular first ring attachment portion 74 is formed from the upper end of this cylindrical portion 73 and is planar in the outer radial direction. A cylindrical step portion 75 is formed upward from the outer end of the ring, and a second ring attachment portion 76 is formed from the upper end of the step portion 75 in a planar shape in the outer radial direction. Second ring attachment part 7
6 is joined to the lower surface of the disk portion 68 of the mouth frame member 62, and a claw portion 77 protruding from the outer edge engages with the outer edge of the disk portion 68.

A pair of sliding rings 78a and 78b having different diameters are attached to the lower surface of the first ring attachment portion 74 and are electrically connected to each of the terminals 71, respectively. A pair of sliding rings 79a and 79b having different diameters are attached to the lower surface of the second ring attaching portion 76 and electrically connected to each of the terminals 72, respectively.

Further, a ring-shaped support portion 80 is formed protruding from the back plate 42 of the lid body 24 to fit and abut the outer periphery of the stepped portion 75 of the rotary body 61 to rotatably support the rotary body 61. ing. Note that a notch is formed in this support portion 80 corresponding to a terminal portion to be described later.

Further, as shown in FIG. 1, the back plate 24 has:
Fixed terminals 81a and 81b are fixed by screws 82, and fixed terminals 81a and 81b are slidably in contact with the sliding rings 78a and 78b, respectively, and fixed terminals 83a and 83b are slidably in contact with the sliding rings 79a and 79b, respectively.
are fixed by screws 82. Note that control signals are transmitted to the fixed terminals 81a and 81b, and motor drive power is supplied to the fixed terminals 83a and 83b.

Therefore, the first ring mounting portion 74 of the rotating body 61 is connected to the low pressure side for transmitting control signals.
The second ring attachment portion 76 is connected to the high voltage side for supplying power to the motor.

An annular packing 84 is attached to the inner opening 46 of the back plate 24, and the lower end of the cylindrical portion 73 of the rotating body 61 is in slidable contact therewith.

Next, the operation of this embodiment will be explained.

When cleaning, the shutter 50 is opened and the water is removed through the outer opening 45 of the lid cover 41 of the lid body 24.
An insertion pipe of a hose (not shown) is inserted into the suction port 66 of the rotating body 61 and connected. With this plug-in connection, the tip of the plug-in tube is inserted into the dust collection bag 39, and each terminal of the hose is connected to each terminal 71, 72 of the rotating body 61, respectively. Also,
A rotating brush and a suction port body containing a motor for rotationally driving the rotating brush are connected to the hose via an extension tube.

Therefore, the control circuit section of the cleaner main body 21 and the hand operation section of the hose are electrically connected. Also,
The power circuit section of the vacuum cleaner body 21 and the motor of the suction port body are electrically connected.

Then, by turning on the operation switch provided on the hand control section of the hose, the electric blower 40 is driven, and the dust is sucked in from the suction port body along with the air, and collected through the extension pipe and the hose. The dust is guided to the dust chamber 33 and captured in the dust collection bag 38. The air filtered by the dust bag 38 is sucked into the electric blower 40 and discharged into the electric blower chamber 34, and then passes through the exhaust chamber 36 to the exhaust port 3.
5 to the outside. It is also possible to clean by supplying power to the motor of the suction port and rotating the rotating brush.

During this cleaning, if a rotational force is applied to the insertion tube of the hose, the rotating body 61 is moved together with the insertion tube.
rotates. The rotating body 61 rotates while the stepped portion 75 slides on the inner surface of the support portion 80 . When this rotating body 61 rotates, each sliding ring 78a, 78b, 79a
, 79b, each fixed terminal 81a, 81b, 83a
, 83b slide in contact and remain electrically connected.

As described above, since the location where the rotating body 61 is rotatably fitted and supported is the stepped portion 75 between the ring mounting portions 74 and 76, which is on the larger diameter side compared to the conventional case, the rotating body 61 The influence of variations in the dimensional accuracy of the supporting portion 80 is small. Therefore, the rotating body 61 rotates smoothly, and the rotating body 61
There is little rattling, the position of the rotating body 61 is stabilized, and the contact state between each sliding ring 78a, 78b, 79a, 79b and each fixed terminal 81a, 81b, 83a, 83b is stabilized.

Furthermore, by forming the first ring attachment part 74 and the second ring attachment part 76 in a planar shape in the outer diameter direction, the ring can be made thinner. Moreover, even with such a thin profile, the step portion 75 is provided and the support portion 80 separates the first ring attachment portion 74 on the low pressure side from the second ring attachment portion 76 on the high pressure side. Insulation distance can be secured.

Furthermore, the first ring mounting portion 74 on the inner diameter side of the rotating body 61 has a smaller displacement than the outer diameter side, and this first ring mounting portion 74 is used as a low pressure side for transmitting control signals. This ensures reliable transmission of control signals.

Furthermore, fixed terminals 81a, 81b, 83
a and 83b can be made common, and costs can be reduced.

[0036]

According to the present invention, the rotating body is provided with a first ring mounting portion and a second ring mounting portion which are planar in the outer diameter direction, and a stepped portion is provided between the two ring mounting portions. In order to rotatably support this step part with the support part of the vacuum cleaner body, the place where the rotary body is rotatably fitted and supported is the step part between both ring attachment parts, and it has a larger diameter than the conventional one. Therefore, slight variations in the dimensional accuracy of the rotating body and the support part have little effect. Therefore, the rotating body rotates smoothly, there is little rattling of the rotating body, the position of the rotating body is stabilized, and the state of contact between each sliding ring and each fixed terminal can be stabilized.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a vacuum cleaner of the present invention.

FIG. 2 is a partial cross-sectional view.

FIG. 3 is a plan view of the rotating body.

FIG. 4 is a sectional view of a conventional vacuum cleaner.

[Explanation of symbols]

21 Vacuum cleaner body 33 Dust collection chamber 40 Electric blower 61 Rotating body 66 Suction port 74 First ring attachment part 75 Step part 76 Second ring attachment part 78a, 78b, 79a, 79b Sliding ring 80 Support part

Claims (1)

[Claims] Claim 1: A vacuum cleaner body is provided with a dust collection chamber, and a rotating body is rotatably provided, which has a built-in electric blower that communicates with the dust collection chamber, and has a suction port that communicates the dust collection chamber with the outside; In a vacuum cleaner in which the rotary body holds a hose connected to the suction port of the rotary body and electrically connects the vacuum cleaner body side and the hose side, the rotary body has a A planar annular first ring attachment part and a second ring attachment part having a larger diameter than the first ring attachment part are provided, and between the first ring attachment part and the second ring attachment part. A stepped portion in the axial direction is provided, and a pair of sliding rings with different diameters electrically connected to the hose side are respectively attached to the first ring attachment portion and the second ring attachment portion, and the vacuum cleaner body is provided with a step portion in the axial direction. , a support part is provided that fits into the stepped part of the rotating body and rotatably supports the rotating body, and a support part is provided for each pair of sliding rings of the first ring attachment part and the second ring attachment part, respectively. A vacuum cleaner characterized in that each pair of fixed terminals are provided with a pair of fixed terminals that are slidably in contact and electrically connected.