EP1419725A2 - Electric vacuum cleaner - Google Patents
Electric vacuum cleaner Download PDFInfo
- Publication number
- EP1419725A2 EP1419725A2 EP03257086A EP03257086A EP1419725A2 EP 1419725 A2 EP1419725 A2 EP 1419725A2 EP 03257086 A EP03257086 A EP 03257086A EP 03257086 A EP03257086 A EP 03257086A EP 1419725 A2 EP1419725 A2 EP 1419725A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- inner tube
- guide hose
- suction
- connecting assembly
- main body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/24—Hoses or pipes; Hose or pipe couplings
- A47L9/242—Hose or pipe couplings
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/24—Hoses or pipes; Hose or pipe couplings
- A47L9/242—Hose or pipe couplings
- A47L9/246—Hose or pipe couplings with electrical connectors
Definitions
- the present invention relates to an electric vacuum cleaner and more particularly to an electric vacuum cleaner that includes a cleaner main body, a guide hose which is connected at its one end to the suction port of this cleaner main body, and a suction pipe which is connected to another end of the guide hose and has a suction head.
- a typical electric vacuum cleaner comprises a cleaner main body that has a suction port, a guide hose attached at its one end to the suction port, and a suction hose that is connected at its one end to the guide hose via a connecting assembly and has at its another a suction head.
- the connecting portion between the suction port of the cleaner main body and the guide hose and the connecting portion between the guide hose and the suction pipe are rotatable in the circumferential directions so that no twisting occurs in the guide hose.
- An operating switch for operating the driving of a suction mechanism that includes an electric motor, etc. installed in the cleaner main body is typically disposed on the suction pipe.
- This operating switch is ordinarily electrically connected to the suction mechanism via a conductive wire which is wrapped in a spiral form around the outer surface of the guide hose.
- a connecting assembly such as that shown in Figure 7 (disclosed in Japanese Patent Application Laid-Open (Kokai) No. 7-67817) is employed in conventional electric vacuum cleaners.
- the connecting assembly 100 of Figure 7 connects a guide hose 114 and a suction pipe 116.
- the connecting assembly 100 is comprised of a tubular rotating portion 104 which is attached to the guide hose 114 and a retaining part 102 which is disposed on the suction pipe 116, and the retaining part 102 is fitted over the rotating portion 104 so that the rotating portion 104 is supported rotatably.
- the conductive wire 120a of the operating switch 120 is connected to contacts 108 which are disposed on the inner circumferential portion of the retaining part 102, and a conductive wire 105 which is disposed on a projecting rib 114a that is formed in a spiral shape on the outer circumferential surface of the guide hose 114 is connected to a metal band 106 that is wrapped around the rotating portion 104.
- the contacts 108 are pressed against the outer circumferential surface of the metal band 106, the operating switch 120 and suction mechanism are brought into an electrically connected state.
- Figure 8 show the cross-section of the connecting assembly 100 of Figure 7.
- one end 106a of the metal band 106 is bent into an angled letter C-shape and anchored on the anchoring portion 110 disposed on the rotating portion 104.
- the metal band 106 is wrapped around the outer circumferential surface of the rotating portion 104, and then the end surface of the end 106b is bent into an L shape in a state in which this end surface abuts the end 106a and is thus anchored to the outer circumferential portion of the rotating portion 104.
- the present invention is to solve these problems in the conventional electric vacuum cleaners.
- the aim of the present invention is to provide an electric vacuum cleaner in which the rotation of the connected elements is smooth and required electrical connections are reliably maintained in the connecting portion where the guide hose is connected to other components.
- the guide hose is connected to either one of the inner tube and outer tube, and the suction port is connected to the other of these two elements (inner tube and outer tube), so that the guide hose is connected to the cleaner main body rotatably.
- the guide hose can be rotatably connected via the connecting assembly to the suction pipe.
- the guide hose can be connected to either one of the inner tube and outer tube, and the suction pipe can be connected to the other of these two elements (inner tube and outer tube), so that the guide hose is connected to the suction pipe rotatably.
- the metal rings are those formed by press working.
- FIG. 1 shows the overall structure of one embodiment of the electric vacuum cleaner of the present invention.
- the electric vacuum cleaner 10 comprises a cleaner main body 12, a guide hose 14 and a suction pipe 20.
- the cleaner main body 12 is equipped with a suction mechanism such as an electrically driven blower, etc., and the guide hose 14 is connected at its one end to the suction port 13 of the cleaner main body 12.
- the suction pipe 20 is connected at its one end to the other end of the guide hose 14, and it has at its other end a suction head 18 that sucks in air containing dust.
- An operating switch 16 that operates the driving of the suction mechanism of the cleaner main body 12 is disposed on the suction pipe 20.
- This operating switch 16 is electrically connected to the cleaner main body 12 by a conductive wire 39b provided on the guide hose 14.
- the conductive wire 39b is disposed inside a projecting rib 14a which is formed in a manner to wrap in a spiral form around the outer surface of the guide hose 14; and one end of the conductive wire is connected to the cleaner main body 12, and the other end is connected to the operating switch 16.
- FIG. 1 shows a perspective view of the connecting assembly in this embodiment
- Figure 2B is a sectional side view of the connecting assembly.
- the connecting assembly 22 is comprised of an inner tube 26, which is in a tubular shape, and an outer tube 23, which is also a tubular shape and fitted over and attached to this inner tube 26.
- One end of the outer tube 23 is connected to the suction port 13, and one end of the inner tube 26 is connected to one end of the guide hose 14 in such a manner that the guide hose 14 is rotatable in its circumferential direction.
- the outer tube 23 of the shown embodiment is comprised of a connecting pipe 24 and a cover 28.
- the connecting pipe 24 is connected at its one (first) end to the suction port 13, and the inner tube 26 is inserted into the other (second) end of the connecting pipe 24.
- the cover 28 is fitted over the connecting pipe 24 so that the inner tube 26 is prevented from slipping out of the connecting pipe 24.
- the inner tube 26 is inserted from the second end of the connecting pipe 24, and the edge of one (first) end of the inner tube 26 contacts an anchoring projection 38 which is disposed on the inside circumferential portion of the connecting pipe 24.
- the portion of the inner tube 26 that is not in the connecting pipe 24 is covered by the cover 28 that is attached to the connecting pipe 24.
- the cover 28 has a diameter that is larger than the diameters of the inner tube 26 and connecting pipe 24. This cover 28 is provided so that the outer circumferential portion of the inner tube 26 and the inner circumferential portion of the cover 28 are separated with a gap in between.
- An anchoring projecting part 36a which protrudes inward is disposed on the inner circumferential portion of the cover 28.
- This anchoring projecting part 36a engages with a recess 36b formed in a circumferential configuration in the outer circumferential surface of the inner tube 26.
- metal rings 40 are disposed on the outer circumferential portion of the inner tube 26; and contacts 42 that constantly contact the outer circumferential surfaces of the metal rings 40 are disposed on the inner circumferential portion of the cover 28.
- the operating switch 16 and the suction mechanism in the cleaner main body 12 are electrically connected.
- a connecting portion which is kept in an electrical continuity is provided so as to be rotatable more smoothly than that of conventional cleaners.
- the structure of the connecting portion or the connecting assembly 22 will be described below in more detail.
- metal rings 40 are attached to the inner tube 26.
- the shape of these metal rings 40 is shown in Figures 3A through 3C.
- the metal ring 40 comprises a ring body 40a, which is formed in a ring shape with a specified width, and a flange portion 40b, which extends inward in the direction of diameter from one circumferential edge of this ring body 40a.
- the surface of the flange portion 40b faces in the axial direction.
- a conductive wire 39a which is connected to the above-described conductive wire disposed inside the guide hose 14 is attached to the flange portion 40b of this metal ring 40.
- the metal rings 40 are formed by press working using a metal mold. Accordingly, there are no seams in each one of the metal rings 40, and these rings are obtained as rings that are integrally continuous in the circumferential direction.
- the metal rings 40 formed into the above-described shape are provide spacedly or with adjacent metal rings 40 being separated by means of spacers 44.
- Figures 4A and 4B show one of the spacers used in the shown embodiment.
- the spacer 44 is in the form of a C-shaped ring with one portion (44c) being separated by cutting, and anchoring portions 44d which protrude inward in the direction of the diameter are disposed on both end portions located on either side of the cut gap 44c.
- the spacer 44 comprises an insertion section 44a and a separating section 44b that have different diameters in roughly the axial center of the spacer (or with respect to the direction of thickness).
- the insertion section 44a has a diameter which is such that the outer circumferential surface of the insertion section 44a is in contact with the inner circumferential surface of the corresponding metal ring 40 when the spacer 44 is inserted and engaged from the open side 40d of the metal ring 40.
- the separating section 44b of the spacer 44 has a diameter that is larger than that of the insertion section 44a and protrudes from the open side 40d of the corresponding metal ring 40 when the metal ring 40 and the spacer 44 are engaged together.
- the gap 44c of the spacer 44 is set so that the conductive wire 39a of the metal ring 40 is in the gap 44c of the spacer 44.
- the ring units 52 in which the metal rings 40 and spacers 44 are engaged are fitted on the inner tube 26 from one end of the inner tube 26 and attached to the outer circumferential portion of the inner tube 26.
- Figure 5 shows the inner tube 26 on which the ring units 52 are to be mounted.
- the inner tube 26 is in a tubular shape, and a reference flange 46 that serves as a reference position for attaching the ring units 52 is disposed on the outer circumferential surface of the inner tube 26 so that this flange portion 46 protrudes around the circumference.
- Ring supporting plates 48 which are projecting plates extending for a specified length in the axial direction of the inner tube 26 from the reference flange 46, are disposed at positions where the ring units 52 are spacedly provided in order from the reference flange 46.
- the ring supporting plates 48 are disposed at specified intervals in the circumferential direction, and they support the ring units 52 thereon by contacting the inner circumferential portions of the ring units 52.
- the ring units 52 fitted on the ring supporting plates 48 are disposed so that there is a gap between the ring units 52 and the outer circumferential surface of the inner tube 26, and the conductive wires 39a of the metal rings 40 extend toward the guide hose 14 side through this gap.
- the ring supporting plates 48 are disposed adjacent to each other in the area formed by the gap, and the conductive wires 39a of the metal rings 40 are guided toward the guide hose 14 through grooves 50 formed between the ring supporting plates 48 and connected to the conductive wire 39b provided along the guide hose 14.
- spacer guides 54 are disposed adjacent to the grooves 50 of the inner tube 26. These spacer guides 54 guide the spacers 44 with their guide projections 54a that protrude so as to clamp the anchoring portions 44d of the spacers 44 from both sides in the circumferential direction. The spacers 44 that are guided by these spacer guides 54 are secured without positional deviation, since the rotation of the spacers 44 in the circumferential direction is restricted by the spacer guides 54.
- the ring units 52 each comprising the metal ring 40 and the spacer 46, are mounted on the inner tube 26 that is formed as described above in the following manner: A first ring unit 52 is fitted over the inner tube 26 from one end of the inner tube 26 with the flange portion 40b of the metal ring 40 first and then the ring body 40, and this first ring unit 52 is moved toward the reference flange 46 while the conductive wire 39a of the metal ring 40 is inserted into the grooves 50. Then, the flange portion 40b of the metal ring 40 of the first ring unit 52 is brought to contact with the reference flange 46, and this first ring unit 52 is secured in a position where the anchoring portions 44d of the corresponding spacer 44 is anchored by the spacer guide 54.
- a second ring unit 52 is likewise is fitted over the inner tube 26 in the same manner as the first one above and is secured adjacent to the previously attached first ring unit 52.
- the metal ring 40 of the preceding or the first ring unit and the metal ring 40 of the following or the second ring unit are thus spacedly disposed on the inner tube 26 by the separating sections 44b of the spacers 44.
- a total of four ring units 52 in the shown embodiment are thus successively fitted on the inner tube 26 in this manner; and after the fourth ring unit 52 is installed, a fastening ring 60 (see Figure 2B) is attached in order to prevent the ring units 52 from slipping out.
- a projection 44e which protrudes in the axial direction of the spacer 44 is formed on the circumferential side surface of the separating section 44b of each one of the spacers 44.
- a cut-out 40c is formed in the flange portion 40b of the metal ring 40.
- the cut-out 40c is formed by cutting out a part of the flange portion 40b of the metal ring 40.
- the metal rings 40 and spacers 44 are thus set on the inner tube 26 and attached thereon in a state in which these metal rings 40 and spacers 44 are in an engagement with each other to form a single unit.
- the metal rings 40 are stably supported and easily installed spacedly from other metal rings 40. Accordingly, assembling of the connecting assembly 22 is easy. Furthermore, since the metal rings 40 are supported by the spacers 44, the ring bodies 40a of the metal rings 40 are reinforced, and deformation of the metal rings 40 is prevented.
- flange portions 40b are formed on the metal rings 40, these flange portions 40b are clamped between the spacers 44 of the ring units 52 that are successively inserted; as a result, positional deviation of the metal rings 40 in the axial direction can be prevented.
- the cover 28 is formed by combining a cover upper section 28a and a cover lower section 28b.
- the cover upper section 28a is formed in a semicircular shape (or a half-cylinder shape) and a portion of the outer circumferential surface thereof is caused to bulge outward.
- the cover lower section 28b is also formed in a semicircular shape (or a half-cylinder shape) and covers the opposite side of the cover upper section 28a.
- Figure 6 shows the cover upper section 28a.
- a contact attachment plate 56 is provided inside the cover upper section 28a, and plate springs 58 used as an urging element that is constantly urged toward the metal rings 40 are attached to the contact attachment plate 56.
- the these plate springs 58 have attachment portions 58a which are anchored on the contact attachment plate 56. Each plate spring 58 is formed so that it branches out in a bifurcated manner toward the metal ring 40 from the attachment portion 58a. Contacts 42 which protrude toward the metal rings 40 are disposed on both end portions of the bifurcated plate springs 58. The contacts 42 constantly contact the outer circumferential surfaces of the metal rings 40.
- the attachment portions 58a of the plate springs 58 attached to the contact attachment plate 56 are connected to terminal pins 34 by conductive wires 62 (see Figure 2B).
- the terminal pins 34 protrude from the cover 28 in the direction of insertion into the suction port 13 of the cleaner main body 12.
- the cover 28 has a hook 32.
- the hook 32 causes the suction port 13 and connecting assembly 22 to engage with each other when the connecting assembly 22 is attached to the suction port 13. Using the hook 32, the suction port 13 and the connecting assembly 22 are freely connected to and disconnected from each other.
- one end (right end in Figure 2B) of the connecting pipe 24 is connected to the suction port 13 of the cleaner main body 12, and the terminal pins 34 installed in its cover 28 are plugged into and connected to terminal pin receivers (not shown in the drawings) disposed in the vicinity of the suction port 13.
- the terminal pins 34 As a result of the terminal pins 34 connected to the terminal pin receivers, the terminal pins 34 and the suction mechanism installed in the cleaner main body 12 are electrically connected. Since the terminal pins 34 are connected to the contacts 42, and the contacts 42 are in constant contact with the metal rings 40 to which the conductive wire of the guide hose 14 is connected, the suction mechanism and the operating switch 16 to which the conductive wire at the other end of the guide hose 14 is connected are kept in an electrical continuity.
- each of the metal rings 40 that are provided on the inner tube 26 of the connecting assembly 22 is formed as a ring smoothly continuous in its circumferential direction. Accordingly, the contacts 42 are moved smoothly along the outer circumferential surfaces of the metal rings 40 and not caught thereby unlike in the conventional connecting assembly 100 shown in Figure 8. As a result, the guide hose 14 connected to the connecting assembly 22 is rotated smoothly, and the electric vacuum cleaner is used without paying attention to twisting of the guide hose 14.
- the suction head 18 is provided as a power nozzle that has a brush rotated by a motor (not shown in the drawings). Accordingly, the suction head 18 is electrically connected by the conductive wire that is provided to extend from the operating switch 16 to the suction head 18 through the suction pipe 20.
- the present invention is not limited to a configuration in which the suction head 18 is electrically connected.
- the connecting assembly which is rotatable is provided between one end of the guide hose 14 and the suction port 13 of the cleaner main body 12.
- the present invention is not limited to this structure, and it is possible to provide the connecting assembly between the guide hose 14 and the suction pipe 20 in a rotatable fashion.
- one end of the connecting assembly 22 is connected to the suction port 13, and the other end of the connecting assembly 22 is connected to one end of the guide hose 14.
- the hook 32 is disposed on the cover 28, so that the connecting assembly 22 is, at its one end, freely attached and detached.
- the connecting assembly 22 be integrally connected and not detachable with reference to the suction port 13 or the guide hose 14.
- Each one of the metal rings 40 can be without the flange portion 40b, and the metal rings 40 thus can be formed by the ring bodies 40a only.
- the guide hose is connected (to the suction port or to the suction hose) by a connecting assembly, which is made of an outer tube and an inner tube, in a rotatable manner.
- the circumferentially continuous metal rings having no seams therein are disposed on the outer circumferential portion of the inner tube, and the contacts disposed on the inner circumferential portion of the outer tube are in constant contact with the outer circumferential surfaces of the metal rings, so that the metal rings and the contacts are electrically connected at all times. Accordingly, electrical contact between the metal rings and the contacts is accomplished smoothly, the inner tube is rotated easily with respect to the outer tube in the connecting assembly, and the electric vacuum cleaner is used in a pleasant manner without the guide hose being twisted.
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- Electric Vacuum Cleaner (AREA)
Abstract
Description
- The present invention relates to an electric vacuum cleaner and more particularly to an electric vacuum cleaner that includes a cleaner main body, a guide hose which is connected at its one end to the suction port of this cleaner main body, and a suction pipe which is connected to another end of the guide hose and has a suction head.
- A typical electric vacuum cleaner comprises a cleaner main body that has a suction port, a guide hose attached at its one end to the suction port, and a suction hose that is connected at its one end to the guide hose via a connecting assembly and has at its another a suction head. In this electric vacuum cleaner, the connecting portion between the suction port of the cleaner main body and the guide hose and the connecting portion between the guide hose and the suction pipe are rotatable in the circumferential directions so that no twisting occurs in the guide hose.
- An operating switch for operating the driving of a suction mechanism that includes an electric motor, etc. installed in the cleaner main body is typically disposed on the suction pipe. This operating switch is ordinarily electrically connected to the suction mechanism via a conductive wire which is wrapped in a spiral form around the outer surface of the guide hose.
- So as to secure the connection between the guide hose that has a conductive wire and the suction pipe in a rotatable fashion and electrically, a connecting assembly such as that shown in Figure 7 (disclosed in Japanese Patent Application Laid-Open (Kokai) No. 7-67817) is employed in conventional electric vacuum cleaners.
- More specifically, the connecting
assembly 100 of Figure 7 connects aguide hose 114 and asuction pipe 116. The connectingassembly 100 is comprised of a tubular rotatingportion 104 which is attached to theguide hose 114 and aretaining part 102 which is disposed on thesuction pipe 116, and theretaining part 102 is fitted over the rotatingportion 104 so that the rotatingportion 104 is supported rotatably. - In this connecting
assembly 100, theconductive wire 120a of theoperating switch 120 is connected tocontacts 108 which are disposed on the inner circumferential portion of theretaining part 102, and a conductive wire 105 which is disposed on a projectingrib 114a that is formed in a spiral shape on the outer circumferential surface of theguide hose 114 is connected to ametal band 106 that is wrapped around the rotatingportion 104. When thecontacts 108 are pressed against the outer circumferential surface of themetal band 106, theoperating switch 120 and suction mechanism are brought into an electrically connected state. - Figure 8 show the cross-section of the connecting
assembly 100 of Figure 7. As seen from Figure 8, oneend 106a of themetal band 106 is bent into an angled letter C-shape and anchored on the anchoringportion 110 disposed on the rotatingportion 104. Themetal band 106 is wrapped around the outer circumferential surface of the rotatingportion 104, and then the end surface of theend 106b is bent into an L shape in a state in which this end surface abuts theend 106a and is thus anchored to the outer circumferential portion of the rotatingportion 104. - When the
metal band 106 is wrapped around the rotatingportion 104 and attached by causing the oneend 106a and theother end 106b of themetal band 106 to abut each other as shown in Figure 8, a step or gap is generated in thisabutment area 112, and this causes several problems. - Upon operation of the electric vacuum cleaner, when the
contacts 108, which are moved while constantly making contact with the outer circumferential surface of themetal band 106, pass through theabutment area 112, the contacts become caught on the step or gap of theabutment area 112. Also, the rotatingportion 104 is not rotated smoothly. - Furthermore, in the structure of Figure 8, when the
metal band 106 is installed during assembling of the connecting assembly, it is necessary to wrap and fasten themetal band 106 around the rotatingportion 104 in a state in which oneend 106a and theother end 106b of themetal band 106 are brought into abutment to each other without any gap. Thus, installing themetal band 106 is complicated, and the assembling work is not performed efficiently. - The present invention is to solve these problems in the conventional electric vacuum cleaners.
- The aim of the present invention is to provide an electric vacuum cleaner in which the rotation of the connected elements is smooth and required electrical connections are reliably maintained in the connecting portion where the guide hose is connected to other components.
- The above aim is accomplished by a unique structure of the present invention for an electric vacuum cleaner that includes:
- a cleaner main body that has a suction mechanism,
- a guide hose which is connected at its first end to a suction port of the cleaner main body and has a conductive wire extending from one end to another end of the guide hose, and
- a suction pipe which is connected at one end thereof to the second end of the guide hose and has a suction head and an operating switch that electrically operates the suction mechanism via the conductive wire; and in the present invention,
- the guide hose is connected to the cleaner main body in a rotatable manner via a connecting assembly that is comprised of an inner tube and an outer tube that is fitted over the inner tube,
- metal rings which are integrally continuous in a circumferential direction are disposed on the outer circumferential portion of the inner tube of the connecting assembly,
- contacts which are in contact with the outer circumferential surfaces of the metal rings are disposed on the inner circumferential portion of the outer tube of the connecting assembly, and
- the operating switch and the suction mechanism are kept electrically connected via the connecting assembly.
-
- In the above structure, the guide hose is connected to either one of the inner tube and outer tube, and the suction port is connected to the other of these two elements (inner tube and outer tube), so that the guide hose is connected to the cleaner main body rotatably.
- The guide hose can be rotatably connected via the connecting assembly to the suction pipe.
- Furthermore, in the present invention, the guide hose can be connected to either one of the inner tube and outer tube, and the suction pipe can be connected to the other of these two elements (inner tube and outer tube), so that the guide hose is connected to the suction pipe rotatably.
- The metal rings are those formed by press working.
- Embodiments of the present invention will now be described by way of example only, with reference to the accompanying drawings, in which:-
- Figure 1 is an explanatory illustration of one embodiment of the electric vacuum cleaner according to the present invention;
- Figure 2A is a perspective view of the connecting assembly used in the present invention, and Figure 2B is a sectional side view thereof;
- Figure 3A is a rear perspective view of one of the metal rings used in the present invention, Figure 3B is a side view thereof shown in cross-section, and Figure 3C is a front view thereof;
- Figure 4A is a side view of one of the spacers used in the present invention, and Figure 4B is a front view thereof;
- Figure 5 is a side view of the inner tube of the shown embodiment;
- Figure 6 is a disassembled perspective view of the cover of the connecting assembly;
- Figure 7 shows in cross section a connecting assembly of a conventional vacuum cleaner; and
- Figure 8 is an enlarged sectional view taken along the line 8-8 in Figure 7.
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- Preferred embodiments of the electric vacuum cleaner of the present invention will be described in detail below with reference to the accompanying drawings.
- Figure 1 shows the overall structure of one embodiment of the electric vacuum cleaner of the present invention. The
electric vacuum cleaner 10 comprises a cleanermain body 12, aguide hose 14 and asuction pipe 20. The cleanermain body 12 is equipped with a suction mechanism such as an electrically driven blower, etc., and theguide hose 14 is connected at its one end to the suction port 13 of the cleanermain body 12. Thesuction pipe 20 is connected at its one end to the other end of theguide hose 14, and it has at its other end asuction head 18 that sucks in air containing dust. - An
operating switch 16 that operates the driving of the suction mechanism of the cleanermain body 12 is disposed on thesuction pipe 20. Thisoperating switch 16 is electrically connected to the cleanermain body 12 by aconductive wire 39b provided on theguide hose 14. Theconductive wire 39b is disposed inside a projectingrib 14a which is formed in a manner to wrap in a spiral form around the outer surface of theguide hose 14; and one end of the conductive wire is connected to the cleanermain body 12, and the other end is connected to theoperating switch 16. - In the
electric vacuum cleaner 10 of the shown embodiment, the suction port 13 of the cleanermain body 12 and one end (base end) of theguide hose 14 are connected in a rotatable manner by a connectingassembly 22 so that twisting of theguide hose 14 is prevented. Figure 2A shows a perspective view of the connecting assembly in this embodiment, and Figure 2B is a sectional side view of the connecting assembly. - More specifically, as seen from Figures 2A and 2B, the connecting
assembly 22 is comprised of aninner tube 26, which is in a tubular shape, and anouter tube 23, which is also a tubular shape and fitted over and attached to thisinner tube 26. One end of theouter tube 23 is connected to the suction port 13, and one end of theinner tube 26 is connected to one end of theguide hose 14 in such a manner that theguide hose 14 is rotatable in its circumferential direction. - The
outer tube 23 of the shown embodiment is comprised of a connectingpipe 24 and acover 28. The connectingpipe 24 is connected at its one (first) end to the suction port 13, and theinner tube 26 is inserted into the other (second) end of the connectingpipe 24. Thecover 28 is fitted over the connectingpipe 24 so that theinner tube 26 is prevented from slipping out of the connectingpipe 24. - As shown in Figure 2B, the
inner tube 26 is inserted from the second end of the connectingpipe 24, and the edge of one (first) end of theinner tube 26 contacts ananchoring projection 38 which is disposed on the inside circumferential portion of the connectingpipe 24. - The portion of the
inner tube 26 that is not in the connectingpipe 24 is covered by thecover 28 that is attached to the connectingpipe 24. Thecover 28 has a diameter that is larger than the diameters of theinner tube 26 and connectingpipe 24. Thiscover 28 is provided so that the outer circumferential portion of theinner tube 26 and the inner circumferential portion of thecover 28 are separated with a gap in between. - An anchoring projecting
part 36a which protrudes inward is disposed on the inner circumferential portion of thecover 28. This anchoring projectingpart 36a engages with arecess 36b formed in a circumferential configuration in the outer circumferential surface of theinner tube 26. As a result, theinner tube 26 and connectingpipe 24 are prevented from slipping out of each other and connected rotatably. - In the connecting
assembly 22 of the shown embodiment,metal rings 40 are disposed on the outer circumferential portion of theinner tube 26; andcontacts 42 that constantly contact the outer circumferential surfaces of themetal rings 40 are disposed on the inner circumferential portion of thecover 28. Thus, theoperating switch 16 and the suction mechanism in the cleanermain body 12 are electrically connected. - In the structure above, a connecting portion which is kept in an electrical continuity is provided so as to be rotatable more smoothly than that of conventional cleaners. The structure of the connecting portion or the connecting
assembly 22 will be described below in more detail. - As seen from Figure 2B, four
metal rings 40 are attached to theinner tube 26. The shape of these metal rings 40 is shown in Figures 3A through 3C. - The
metal ring 40 comprises aring body 40a, which is formed in a ring shape with a specified width, and aflange portion 40b, which extends inward in the direction of diameter from one circumferential edge of thisring body 40a. The surface of theflange portion 40b faces in the axial direction. Aconductive wire 39a which is connected to the above-described conductive wire disposed inside theguide hose 14 is attached to theflange portion 40b of thismetal ring 40. - The metal rings 40 are formed by press working using a metal mold. Accordingly, there are no seams in each one of the metal rings 40, and these rings are obtained as rings that are integrally continuous in the circumferential direction.
- As seen from Figure 2B, the metal rings 40 formed into the above-described shape are provide spacedly or with adjacent metal rings 40 being separated by means of
spacers 44. Figures 4A and 4B show one of the spacers used in the shown embodiment. - As seen from Figure 4B, the
spacer 44 is in the form of a C-shaped ring with one portion (44c) being separated by cutting, and anchoringportions 44d which protrude inward in the direction of the diameter are disposed on both end portions located on either side of the cut gap 44c. As seen from Figure 4A, thespacer 44 comprises aninsertion section 44a and aseparating section 44b that have different diameters in roughly the axial center of the spacer (or with respect to the direction of thickness). - The
insertion section 44a has a diameter which is such that the outer circumferential surface of theinsertion section 44a is in contact with the inner circumferential surface of the correspondingmetal ring 40 when thespacer 44 is inserted and engaged from theopen side 40d of themetal ring 40. Theseparating section 44b of thespacer 44 has a diameter that is larger than that of theinsertion section 44a and protrudes from theopen side 40d of the correspondingmetal ring 40 when themetal ring 40 and thespacer 44 are engaged together. - When the
spacer 44 and themetal ring 40 are brought into tight engagement, the gap 44c of thespacer 44 is set so that theconductive wire 39a of themetal ring 40 is in the gap 44c of thespacer 44. - The
ring units 52 in which the metal rings 40 andspacers 44 are engaged are fitted on theinner tube 26 from one end of theinner tube 26 and attached to the outer circumferential portion of theinner tube 26. Figure 5 shows theinner tube 26 on which thering units 52 are to be mounted. - As seen from Figure 5, the
inner tube 26 is in a tubular shape, and areference flange 46 that serves as a reference position for attaching thering units 52 is disposed on the outer circumferential surface of theinner tube 26 so that thisflange portion 46 protrudes around the circumference.Ring supporting plates 48, which are projecting plates extending for a specified length in the axial direction of theinner tube 26 from thereference flange 46, are disposed at positions where thering units 52 are spacedly provided in order from thereference flange 46. Thering supporting plates 48 are disposed at specified intervals in the circumferential direction, and they support thering units 52 thereon by contacting the inner circumferential portions of thering units 52. - The
ring units 52 fitted on thering supporting plates 48 are disposed so that there is a gap between thering units 52 and the outer circumferential surface of theinner tube 26, and theconductive wires 39a of the metal rings 40 extend toward theguide hose 14 side through this gap. In the shown embodiment, thering supporting plates 48 are disposed adjacent to each other in the area formed by the gap, and theconductive wires 39a of the metal rings 40 are guided toward theguide hose 14 throughgrooves 50 formed between thering supporting plates 48 and connected to theconductive wire 39b provided along theguide hose 14. - Furthermore, spacer guides 54 are disposed adjacent to the
grooves 50 of theinner tube 26. These spacer guides 54 guide thespacers 44 with theirguide projections 54a that protrude so as to clamp theanchoring portions 44d of thespacers 44 from both sides in the circumferential direction. Thespacers 44 that are guided by these spacer guides 54 are secured without positional deviation, since the rotation of thespacers 44 in the circumferential direction is restricted by the spacer guides 54. - The
ring units 52, each comprising themetal ring 40 and thespacer 46, are mounted on theinner tube 26 that is formed as described above in the following manner: Afirst ring unit 52 is fitted over theinner tube 26 from one end of theinner tube 26 with theflange portion 40b of themetal ring 40 first and then thering body 40, and thisfirst ring unit 52 is moved toward thereference flange 46 while theconductive wire 39a of themetal ring 40 is inserted into thegrooves 50. Then, theflange portion 40b of themetal ring 40 of thefirst ring unit 52 is brought to contact with thereference flange 46, and thisfirst ring unit 52 is secured in a position where the anchoringportions 44d of the correspondingspacer 44 is anchored by thespacer guide 54. Next, asecond ring unit 52 is likewise is fitted over theinner tube 26 in the same manner as the first one above and is secured adjacent to the previously attachedfirst ring unit 52. Themetal ring 40 of the preceding or the first ring unit and themetal ring 40 of the following or the second ring unit are thus spacedly disposed on theinner tube 26 by the separatingsections 44b of thespacers 44. - A total of four
ring units 52 in the shown embodiment are thus successively fitted on theinner tube 26 in this manner; and after thefourth ring unit 52 is installed, a fastening ring 60 (see Figure 2B) is attached in order to prevent thering units 52 from slipping out. - As shown in Figure 4, a projection 44e which protrudes in the axial direction of the
spacer 44 is formed on the circumferential side surface of theseparating section 44b of each one of thespacers 44. In addition, as seen from Figure 3C, a cut-out 40c is formed in theflange portion 40b of themetal ring 40. The cut-out 40c is formed by cutting out a part of theflange portion 40b of themetal ring 40. Accordingly, the projection 44e of thespacer 44 of thering unit 52 installed first and the cut-out 40c of themetal ring 40 of thering unit 52 installed second are brought into an engagement with each other, so thatadjacent ring units 52 are connected to each other on theinner tube 26. The second andthird ring units 52, and the third andfourth ring units 52 are likewise engaged each other via the projections 44e and the cut-out 40c and connected. - As seen from the above, the metal rings 40 and
spacers 44 are thus set on theinner tube 26 and attached thereon in a state in which these metal rings 40 andspacers 44 are in an engagement with each other to form a single unit. Thus, the metal rings 40 are stably supported and easily installed spacedly from other metal rings 40. Accordingly, assembling of the connectingassembly 22 is easy. Furthermore, since the metal rings 40 are supported by thespacers 44, thering bodies 40a of the metal rings 40 are reinforced, and deformation of the metal rings 40 is prevented. - Furthermore, since the
flange portions 40b are formed on the metal rings 40, theseflange portions 40b are clamped between thespacers 44 of thering units 52 that are successively inserted; as a result, positional deviation of the metal rings 40 in the axial direction can be prevented. - Next, the
cover 28 that has thecontacts 42 which constantly contact the outer circumferential surfaces of the metal rings 40 will be described. - As shown in Figure 2A, the
cover 28 is formed by combining a coverupper section 28a and a coverlower section 28b. The coverupper section 28a is formed in a semicircular shape (or a half-cylinder shape) and a portion of the outer circumferential surface thereof is caused to bulge outward. The coverlower section 28b is also formed in a semicircular shape (or a half-cylinder shape) and covers the opposite side of the coverupper section 28a. - Figure 6 shows the cover
upper section 28a. - A
contact attachment plate 56 is provided inside the coverupper section 28a, and plate springs 58 used as an urging element that is constantly urged toward the metal rings 40 are attached to thecontact attachment plate 56. - The these plate springs 58 have
attachment portions 58a which are anchored on thecontact attachment plate 56. Eachplate spring 58 is formed so that it branches out in a bifurcated manner toward themetal ring 40 from theattachment portion 58a.Contacts 42 which protrude toward the metal rings 40 are disposed on both end portions of the bifurcated plate springs 58. Thecontacts 42 constantly contact the outer circumferential surfaces of the metal rings 40. - The
attachment portions 58a of the plate springs 58 attached to thecontact attachment plate 56 are connected toterminal pins 34 by conductive wires 62 (see Figure 2B). As seen from Figure 2A, the terminal pins 34 protrude from thecover 28 in the direction of insertion into the suction port 13 of the cleanermain body 12. Thecover 28 has ahook 32. Thehook 32 causes the suction port 13 and connectingassembly 22 to engage with each other when the connectingassembly 22 is attached to the suction port 13. Using thehook 32, the suction port 13 and the connectingassembly 22 are freely connected to and disconnected from each other. - In the connecting
assembly 22 as described above, one end (right end in Figure 2B) of the connectingpipe 24 is connected to the suction port 13 of the cleanermain body 12, and the terminal pins 34 installed in itscover 28 are plugged into and connected to terminal pin receivers (not shown in the drawings) disposed in the vicinity of the suction port 13. - As a result of the terminal pins 34 connected to the terminal pin receivers, the terminal pins 34 and the suction mechanism installed in the cleaner
main body 12 are electrically connected. Since the terminal pins 34 are connected to thecontacts 42, and thecontacts 42 are in constant contact with the metal rings 40 to which the conductive wire of theguide hose 14 is connected, the suction mechanism and theoperating switch 16 to which the conductive wire at the other end of theguide hose 14 is connected are kept in an electrical continuity. - In the shown embodiment, each of the metal rings 40 that are provided on the
inner tube 26 of the connectingassembly 22 is formed as a ring smoothly continuous in its circumferential direction. Accordingly, thecontacts 42 are moved smoothly along the outer circumferential surfaces of the metal rings 40 and not caught thereby unlike in the conventional connectingassembly 100 shown in Figure 8. As a result, theguide hose 14 connected to the connectingassembly 22 is rotated smoothly, and the electric vacuum cleaner is used without paying attention to twisting of theguide hose 14. - In the
electric vacuum cleaner 10 of the shown embodiment, thesuction head 18 is provided as a power nozzle that has a brush rotated by a motor (not shown in the drawings). Accordingly, thesuction head 18 is electrically connected by the conductive wire that is provided to extend from the operatingswitch 16 to thesuction head 18 through thesuction pipe 20. However, the present invention is not limited to a configuration in which thesuction head 18 is electrically connected. - In the above electric vacuum cleaner, the connecting assembly which is rotatable is provided between one end of the
guide hose 14 and the suction port 13 of the cleanermain body 12. However, the present invention is not limited to this structure, and it is possible to provide the connecting assembly between theguide hose 14 and thesuction pipe 20 in a rotatable fashion. - Furthermore, in the shown embodiment, one end of the connecting
assembly 22 is connected to the suction port 13, and the other end of the connectingassembly 22 is connected to one end of theguide hose 14. However, in the present invention, it is also possible to connect one end of the connectingassembly 22, i.e. one end of theouter tube 23, to one end of theguide hose 14, and to connect the other end of the connectingassembly 22, i.e. one end of theinner tube 26, to the suction port 13. Furthermore, there is likewise no limitation on the direction of attachment of the connectingassembly 22 in cases where the connectingassembly 22 is provided between theguide hose 14 and thesuction pipe 20. - In addition, in the connecting
assembly 22 described above, thehook 32 is disposed on thecover 28, so that the connectingassembly 22 is, at its one end, freely attached and detached. However, it is possible that the connectingassembly 22 be integrally connected and not detachable with reference to the suction port 13 or theguide hose 14. - Each one of the metal rings 40 can be without the
flange portion 40b, and the metal rings 40 thus can be formed by thering bodies 40a only. - As seen from the above, in the electric vacuum cleaner of the present invention, the guide hose is connected (to the suction port or to the suction hose) by a connecting assembly, which is made of an outer tube and an inner tube, in a rotatable manner. The circumferentially continuous metal rings having no seams therein are disposed on the outer circumferential portion of the inner tube, and the contacts disposed on the inner circumferential portion of the outer tube are in constant contact with the outer circumferential surfaces of the metal rings, so that the metal rings and the contacts are electrically connected at all times. Accordingly, electrical contact between the metal rings and the contacts is accomplished smoothly, the inner tube is rotated easily with respect to the outer tube in the connecting assembly, and the electric vacuum cleaner is used in a pleasant manner without the guide hose being twisted.
Claims (5)
- An electric vacuum cleaner comprising:a cleaner main body that has therein a suction mechanism,a guide hose which is connected at a first end thereof to a suction port of said cleaner main body and is provided with a conductive wire disposed from one end to another end thereof, anda suction pipe which is connected at a first end thereof to a second end of said guide hose and is provided with an operating switch that electrically operates said suction mechanism.via said conductive wire; whereinsaid guide hose is connected to said cleaner main body in a rotatable manner via a connecting assembly that is comprised of an inner tube and an outer tube which is fitted over said inner tube,said inner tube is provided on an outer circumferential portion thereof with metal rings,said outer tube is provided on an inner circumferential portion thereof with contacts which are in contact with outer circumferential surfaces of said metal rings, andsaid operating switch and said suction mechanism are electrically connected via said connecting assembly.
- The electric vacuum cleaner according to Claim 1, wherein
said guide hose is connected to either one of said inner tube and said outer tube,
said suction port is connected to another one of said inner tube and outer tube, and
said guide hose is rotatably connected to said cleaner main body. - An electric vacuum cleaner comprising:a cleaner main body that has therein a suction mechanism,a guide hose which is connected at a first end thereof to a suction port of said cleaner main body and is provided with a conductive wire disposed from one end to another end thereof, anda suction pipe which is connected at a first end thereof to a second end of said guide hose and is provided with an operating switch that electrically operates said suction mechanism via said conductive wire; whereinsaid guide hose is connected to said suction pipe in a rotatable manner via a connecting assembly that is comprised of an inner tube and an outer tube which is fitted over said inner tube,said inner tube is provided on an outer circumferential portion thereof with metal rings,said outer tube is provided on an inner circumferential portion thereof with contacts which are in contact with outer circumferential surfaces of said metal rings, andsaid operating switch and said suction mechanism are electrically connected via said connecting assembly.
- The electric vacuum cleaner according to Claim 3, wherein
said guide hose is connected to either one of said inner tube and said outer tube,
said suction pipe is connected to another one of said inner tube and said outer tube, and
said guide hose is rotatably connected to said suction pipe. - The electric vacuum cleaner according to Claim 1, 2, 3 or 4, wherein said metal rings are formed by press working.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002328242A JP2004159835A (en) | 2002-11-12 | 2002-11-12 | Vacuum cleaner |
JP2002328242 | 2002-11-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1419725A2 true EP1419725A2 (en) | 2004-05-19 |
EP1419725A3 EP1419725A3 (en) | 2005-08-24 |
Family
ID=32171361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03257086A Withdrawn EP1419725A3 (en) | 2002-11-12 | 2003-11-11 | Electric vacuum cleaner |
Country Status (4)
Country | Link |
---|---|
US (1) | US20040123415A1 (en) |
EP (1) | EP1419725A3 (en) |
JP (1) | JP2004159835A (en) |
CA (1) | CA2448813A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5810266B2 (en) * | 2010-04-19 | 2015-11-11 | パナソニックIpマネジメント株式会社 | Electric vacuum cleaner |
CN105030157B (en) * | 2015-08-21 | 2018-01-30 | 江苏美的清洁电器股份有限公司 | Dirt cup component and there is its dust catcher |
KR102099683B1 (en) * | 2018-08-30 | 2020-04-10 | 삼성전자주식회사 | A vaccum cleaner |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4550958A (en) * | 1984-09-17 | 1985-11-05 | Whirlpool Corporation | Electrical hose swivel connector for canister vacuum cleaner |
US4557535A (en) * | 1984-09-17 | 1985-12-10 | Whirlpool Corporation | Electrical hose swivel connector for canister vacuum cleaner |
DE8625098U1 (en) * | 1986-09-19 | 1986-10-30 | Plastiflex Europe N.V., Herentals | Coupling device |
EP0288742A2 (en) * | 1987-04-25 | 1988-11-02 | Licentia Patent-Verwaltungs-GmbH | Vacuum cleaner with a suction tube |
JPH0767817A (en) * | 1993-08-31 | 1995-03-14 | Tec Corp | Vacuum cleaner |
WO1996025083A1 (en) * | 1995-02-16 | 1996-08-22 | Philips Electronics N.V. | Coupling comprising two mutually rotatable and electrically connectable coupling members, and vacuum cleaner provided with such a coupling |
WO1999013761A1 (en) * | 1997-09-12 | 1999-03-25 | Numatic International Limited | Vacuum cleaner |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2769997A (en) * | 1953-07-09 | 1956-11-13 | Gen Electric | Electric cord arrangement for vacuum cleaners |
US3339168A (en) * | 1965-01-04 | 1967-08-29 | Electrolux Corp | Airflow-electric coupling for vacuum cleaner |
US3546656A (en) * | 1969-04-02 | 1970-12-08 | Amp Inc | Electrical connector assembly |
US4345805A (en) * | 1979-09-17 | 1982-08-24 | Plastiflex Company International | Self-sealing vacuum hose swivel fitting |
WO1997016111A1 (en) * | 1995-10-30 | 1997-05-09 | Philips Electronics N.V. | Vacuum-cleaner-hose assembly having a swivel bend and vacuum cleaner comprising such assembly |
-
2002
- 2002-11-12 JP JP2002328242A patent/JP2004159835A/en active Pending
-
2003
- 2003-11-10 US US10/705,129 patent/US20040123415A1/en not_active Abandoned
- 2003-11-10 CA CA002448813A patent/CA2448813A1/en not_active Abandoned
- 2003-11-11 EP EP03257086A patent/EP1419725A3/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4550958A (en) * | 1984-09-17 | 1985-11-05 | Whirlpool Corporation | Electrical hose swivel connector for canister vacuum cleaner |
US4557535A (en) * | 1984-09-17 | 1985-12-10 | Whirlpool Corporation | Electrical hose swivel connector for canister vacuum cleaner |
DE8625098U1 (en) * | 1986-09-19 | 1986-10-30 | Plastiflex Europe N.V., Herentals | Coupling device |
EP0288742A2 (en) * | 1987-04-25 | 1988-11-02 | Licentia Patent-Verwaltungs-GmbH | Vacuum cleaner with a suction tube |
JPH0767817A (en) * | 1993-08-31 | 1995-03-14 | Tec Corp | Vacuum cleaner |
WO1996025083A1 (en) * | 1995-02-16 | 1996-08-22 | Philips Electronics N.V. | Coupling comprising two mutually rotatable and electrically connectable coupling members, and vacuum cleaner provided with such a coupling |
WO1999013761A1 (en) * | 1997-09-12 | 1999-03-25 | Numatic International Limited | Vacuum cleaner |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 06, 31 July 1995 (1995-07-31) & JP 07 067817 A (TEC CORP), 14 March 1995 (1995-03-14) * |
Also Published As
Publication number | Publication date |
---|---|
EP1419725A3 (en) | 2005-08-24 |
CA2448813A1 (en) | 2004-05-12 |
JP2004159835A (en) | 2004-06-10 |
US20040123415A1 (en) | 2004-07-01 |
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