JP2989280B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner, and more particularly, to an improvement of an extension pipe provided with a power supply path from a main body of the electric cleaner to an electric suction tool.

[0002]

2. Description of the Related Art Conventionally, in a vacuum cleaner using an electric suction device equipped with an electric brush or the like, as shown in FIGS. 17 to 19, a straight portion 150a and a telescopic portion 150b are provided outside an extension tube 150. A holding portion 15 is provided with a cord 151 having a configuration, and the straight portion 150a is formed on the outer surface of the extension tube 150.
3 and the extension portion 150b is attached to the outer surface of the extension tube 150 (Japanese Utility Model Application Laid-Open No. 61-61).
164647).

However, in this configuration, since the cord 151 is provided outside the extension tube 150 so as to be exposed, not only is the appearance unsightly, but the cord 151 inadvertently collides with foreign matter, or There was a problem that inconveniences such as disconnection due to being caught on a protrusion or the like occurred.

[0004] As shown in FIGS.
Two parallel energizing rails 163 extending in the direction of expansion and contraction are provided on the inner surface of the outer tube 160 of the contractible extension tube 162 constituted by 61 and 160 so as to be exposed.
Are covered with two insulators 164 made of a flexible elastic material from both sides in the width direction of the rail 163 in an opposed manner, and the outer surface of the inner pipe 161 is provided on the overlapping portion of the insulator 164 opposed to each other. Sliding contact 165 protruding so that it can be energized
As shown in FIG. 21, there is a device in which the two insulators 164 are inserted so as to tear the cracks, and are brought into contact with the rails 163 to enable the current to flow (see Japanese Utility Model Application Laid-Open No. 63-1).
99753).

[0005] In this configuration, the energizing rail 163 provided on the inner surface of the outer tube 160 is covered with the insulator 164, so that the assembling workability is extremely deteriorated, and that the insulator 164 is used for a long time. When the conductive rail 163 is exposed to the dust passage of the extension tube 162 due to wear due to repeated friction with the sliding contact, and the sucked dust contains a conductive object such as a hairpin or a needle, for example, There has been a problem that this conductive object short-circuits the conductive rail 163 and causes an electrical trouble.

Further, Japanese Patent Application Laid-Open No. 2-180233 discloses a configuration in which a feeder is wound around the outer periphery of an inner tube, and both ends of the feeder are connected to conductors provided on the inner surfaces of the inner tube and the outer tube. Is known.

However, in this configuration, since the conductor is disposed on the inner surfaces of the inner tube and the outer tube, the insulating coating of the conductor gradually peels off due to the impact of dust during use, and the conductive material is removed. When the body is exposed to the dust passage of the extension pipe and the conductive object is sucked, the conductive object short-circuits the conductor.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to reliably prevent disconnection of a power supply means such as a cord while improving the appearance of an extension tube, and to provide a cable in an extension tube. An object of the present invention is to provide a safe and durable extension tube for an electric vacuum cleaner, which can reliably eliminate the occurrence of electrical trouble even when sucking a conductive object.

[0009]

[Means for Solving the Problems]

A first means of the present invention comprises a cleaner main body having an electric blower and a dust collecting chamber, a hose connected to a suction port of the cleaner main body, an extension tube connected to the hose, An electric suction tool connected to the extension pipe, wherein the extension pipe comprises an outer pipe having a connection terminal at one end, and an inner pipe having a connection terminal at one end and slidable with respect to the outer pipe. The two ends of a power supply line arranged on the outer periphery of the outer tube and the inner tube are connected to both connection terminals so that current can flow between the two connection terminals in a sliding state of the inner tube. A storage chamber for accommodating a part of the power supply line is formed on one of the outer circumferences, and a power supply line exposed from the storage chamber is covered on the other outer circumference of the outer pipe and the inner pipe, and is inserted into the storage chamber. A detachable cover is provided.

According to a second aspect of the present invention, there is provided a cleaner body having an electric blower and a dust collecting chamber, a hose connected to a suction port of the cleaner body, an extension pipe connected to the hose, An electric suction tool connected to the extension pipe, wherein the extension pipe comprises an outer pipe having a connection terminal at one end, and an inner pipe having a connection terminal at one end and slidable with respect to the outer pipe. In one of the outer tube and the inner tube, a storage chamber is provided which is defined as a dust passage and whose outer peripheral side is covered with a cover, and a power supply rail having one end connected to a connection terminal is stored in the storage chamber. A storage chamber which is defined as a dust passage on the other of the outer pipe and the inner pipe and has an outer peripheral side covered with a cover, and a conductive contact slidably contacting the energizing rail is provided in the storage chamber; A biasing means for biasing the conductive contact toward the current-carrying rail is provided.

[0013] A third means of the present invention includes a cleaner main body having an electric blower and a dust collecting chamber, a hose connected to a suction port of the cleaner main body, an extension pipe connected to the hose, An electric suction tool connected to the extension pipe, wherein the extension pipe comprises an outer pipe having a connection terminal at one end, and an inner pipe having a connection terminal at one end and slidable with respect to the outer pipe. A cover is provided on the outer periphery of the inner tube with a space between the inner tube and the outer periphery of the inner tube, and a power supply line having one end connected to the connection terminal is wound between the outer periphery of the inner tube and the cover. Along with the outer tube, a power supply line having one end connected to a connection terminal and the other end connected to a power supply line is provided, and a cover covering the power supply line is provided around the outer tube, and the outer tube is provided. It is characterized by being slidable between the outer periphery of the inner tube and the cover.

[0013]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 4 shows the entirety of the vacuum cleaner of the present invention. The vacuum cleaner has a vacuum cleaner main body 2 having a dust collecting chamber (not shown) and a dust collecting chamber provided in the cleaner main body 2. A hose 4 connected to a suction port 3 communicating with a hose, and an extensible extension pipe 1 composed of an outer pipe 6 and an inner pipe 5 having one end 5a connected to the hose 4 and the other end 6b connected to an electric suction tool 7, respectively. And an extension pipe 1 from the cleaner main body 2 to the electric suction tool 7.
Is configured to supply power through a power supply path provided in the power supply.

Each of the outer tube 6 and the inner tube 5 has a substantially cylindrical shape with both ends opened, and the inner tube 5 is attached to one end 6a of the outer tube 6.
Are slidably inserted. The other end 6b side of the outer tube 6 is formed to have a slightly small diameter, and the small-diameter end outer peripheral surface 9 is a connecting portion to be connected to a connecting portion (not shown) of the electric suction tool 7. A sheath-like cover 10 that covers a portion in the circumferential direction is formed integrally from the outer peripheral surface of the outer tube 6 to a portion 6a of the outer tube 6 from a position where the connection portion 9 is detached. still,
An inner peripheral surface 6c of one end 6a of the outer tube 6 is raised inward to prevent the inner tube 5 from coming off.

One end 5a of the inner tube 5 is formed to have a slightly larger diameter so that a connection portion (not shown) of the hose 4 can be closely fitted and inserted into the inner peripheral surface 5c. A lock member 11 for locking the connection state of the hose 4 is formed on a part of the inner peripheral surface 5c. The inner tube 5 has a constant outer diameter except for the one end 5a so as to be slidably inserted into the outer tube 6, and the outer peripheral surface 5d of the other end 5b has an inner peripheral surface at the end of the outer tube 6. The inner tube 5 is raised outward to engage with the raised portion 6c and prevent the inner tube 5 from coming off.

Further, a sheath-like cover 12 covering a part in the circumferential direction is integrally formed from the outer peripheral surface of the inner tube 5 to a portion from which the connection portion 5c with the hose 4 is detached to one end 5d of the inner tube. Have been. The outer tube-side cover 10 and the inner tube-side cover 12 are superposed as shown in FIG. 1, thereby forming one power supply passage storage chamber S surrounded by the two covers 10 and 12. ing. One end of the power supply path storage chamber S, that is, the cover 10
A connection terminal 13 for insertion and connection to the connector portion of the electric suction tool 7 is inserted into a side end portion of the electric suction device 7. On the other hand, a connection terminal for connection to the hose 4 side connector portion is provided on a side end portion of the cover 12. 1
4 are provided. A curl cord as an example of a power supply path 8 having one end connected to the connection terminal 13 and the other end connected to the connection terminal 14 is accommodated in the storage room S. The curl cord is selected as the power supply path 8 because the outer pipe 6 and the inner pipe 5 slide to extend the pipe 1.
This is because even if the length changes, it can expand and contract following the change.

FIGS. 3A and 3B show cross sections of the covering bodies 10 and 12 respectively.
Shown in As can be seen from FIG. 3, the cover 10 is closed on both sides in the circumferential direction, but the cover 12 is
Is formed. This is to allow the tube wall of the outer tube 6 to enter the gap t when the extension tube 1 expands and contracts. This allows the extension tube 1 to expand and contract without being obstructed by anything.

In FIG. 1, reference numerals 15 and 16 denote projections which penetrate through two holes formed in the longitudinal direction of the inner tube 5 and protrude to the outside. As shown in FIG. 3A, circles elastically contact the inner wall of the inner tube 5. Protrusions are always urged by leaf springs 17 and 18 having a shape. A hole 19 that engages with the projections 15 and 16 is formed on the outer tube 6 side. The extension tube 1 can be locked in two states of a contracted state and an extended state by the holes 19 and the projections 15 and 16.

Next, FIGS. 5 to 8 show another embodiment of the present invention. Members which are the same as or correspond to those in the embodiment shown in FIGS. .

In this embodiment, the cover and the power supply path are devised. That is, first, an energizing rail 20 whose one end is connected to the connection terminal 14 is disposed on the outer peripheral surface of the inner tube 5, and the cover 12 covering the rail 20 is provided at regular intervals as shown in FIG. Are formed in the engaging holes 21. On the other hand, an operation unit 22 is provided at one end of the cover 10 on the outer tube 6 side. The operation unit 22 includes an operation tool 23 having one end with a projection 23a that engages with the engagement hole 21 and the other end with an operation button 23b that allows the projection 23a to escape from the engagement hole 21 by a push operation. A spring 24 for elastically urging the engagement protrusion 23a into the engagement hole 21; and an operation cover 25 for covering the operation tool 23 with only the operation button 23b exposed.

The operation stroke of the operation tool 23 is long,
When the push operation is not performed, the protrusion 23 a
, And is in contact with the rail 20 on the outer wall of the inner tube 5, so that the pushing protrusion 23 a comes out of the engaging hole 21 when pushed in one direction. As shown in FIG. 7, a conductive contact 26 is formed on the distal end peripheral surface of the protrusion 23 a so that the contact 26 comes into contact with the rail 20 when the operating tool 23 is not pressed. It has become.
When the contact 26 is in contact with the rail 20, the contact 2
An electrode 27 (see FIG. 6) is formed on the wall surface of the outer tube 6 that comes into contact with the outer tube 6. The electrode 27 is housed in the cover 10 of the outer tube 6, and the other end of the cord having one end connected to the connection terminal 13 is connected to the electrode. 27. Note that, unlike the first embodiment, the code 28 does not need to be a curl code.

According to this configuration, the operating tool 23 is pushed to
When the engagement between the projection 23a and the engagement hole 21 is released, the projection 2
Extension tube 1 until 3a engages with appropriate engagement hole 21
Adjust the length of. When the pushing operation of the operating tool 23 is released in this state, the projection 23a enters the engaging hole 21 to lock the extension and contraction operation of the extension tube 1 and the contact 26 on the peripheral surface of the projection 23a comes into contact with the rail 20. . Therefore, the connection terminal 14, the rail 20, the contact 26, the electrode 27, the cord 28,
Electric power can be supplied to the electric suction tool 7 through the connection terminal 13. In this embodiment, the extension and contraction state of the extension tube can be locked by the engagement between the projection 23a and the engagement hole 21 formed in the cover 12, so that the projection 1 as shown in FIG.
No 5, 16 or leaf springs 17, 18 are required. 5 and 6
Reference numeral 29 denotes a lead wire connecting the rail 21 and the connection terminal 14.

FIG. 9 shows another embodiment of the present invention. Note that, in this embodiment and all the following embodiments, components corresponding to the components of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. In the embodiment of FIG. 9, a portion of the outer tube side cover 10 near the connection terminal 13 is bulged, and a code reel 31 is provided on the bulged portion 10 a. One end of the cord 32 wound on the cord reel is connected to the connection terminal 14, and the other end is connected to the connection terminal 13 via the cord reel 31.

FIG. 10 shows still another embodiment of the present invention. In this embodiment, the order of superposition of the outer tube side cover 33 and the inner tube side cover 34 is reversed from that of the previous embodiments, and the outer peripheral surface of the inner tube 5 is provided on the outer peripheral surface of the inner tube 5. And a bellows body 36 having a metal core 35 such as an electric wire wound around a coil adhered to the outer surface of the bellows. One end of the metal core 35 is directly connected to the connection terminal 14, and the other end is a cord 37.
Is connected to the connection terminal 13 via the.

According to this configuration, power is supplied from the hose 4 to the electric suction tool 7 through the connection terminal 14, the metal core 35, the cord 37, and the connection terminal 13. in this case,
Since the bellows body 36 can expand and contract, even if the extension tube 1 is expanded and contracted, there is no problem in supplying power to the electric suction tool 7.

FIG. 11 shows still another embodiment of the present invention. In this embodiment, means for locking the telescopic body of the extension tube 1 is devised. That is, a thread 38 is integrally formed on the outer peripheral surface of the end 6a of the measure tube 6 on the side of connection with the inner tube 5, a conical hole 39 is formed at the inner peripheral end, and the outer periphery of the inner tube 5 is formed. On one side, a screw groove 40 that can be screwed with the screw thread 38 is formed on one side, and on the other side, an inner peripheral surface 41 that can idle and slide in the axial direction with respect to the outer peripheral surface of the inner tube 5, A fixing tool 43 having a conical outer peripheral surface 42 that can be engaged with the conical hole 39 is provided at a tip side of the inner peripheral surface, and the conical hole is formed by screwing or screwing the screw 38 and the screw groove 40. The telescopic body of the extension tube 1 constituted by the replacement 5 such as the outer tube 6 is locked or released by engaging or disengaging the shape hole 39 and the conical outer peripheral surface 42. In this embodiment, a small-diameter pipe is used as the inner tube-side cover as indicated by 44. The power supply path 8 is provided in the pipe 44.
It holds the curl code. One end of the curl cord is connected to the connection terminal 13 on the outer tube 6 side through one end opening 44a of the pipe 44, and the other end is connected to a connection terminal (not shown) through a tube wall 44b near the other end of the pipe 44. ing.

FIG. 12 shows still another embodiment of the present invention. This embodiment is similar to FIG. 5 and is configured by a rail as a part of the power supply path 8. That is, a rail 62 connected to the connection terminal 13 and the electric wire 61 is provided on the outer peripheral surface of the outer tube 6, and the rail 62 is covered with the cover 10, while the inner tube 5 is fitted on the inner surface of the cover 10 and slides. A possible cover 12 is provided, and the cover 10 is provided inside a fitting end of the cover 12.
Is provided, a contact 63 that slides on the rail 62 is provided, and the contact 63 is connected to the connection terminal 14 via a lead wire 64. From the connection terminal 14 to the connection terminal 13, Power is supplied through the power supply path 8 including the line 64, the rail 62, and the electric wire 61. In this case as well, the hose 4 and the electric suction tool 7 can be electrically connected in a state where current can always be supplied, regardless of the extension and contraction of the extension tube 1.

In FIG. 12, between the lead wire 64 on one end 5a side of the inner tube 5 and the connection terminal 14, a connector convex portion 65 having a structure capable of electrical coupling and separation as shown in FIG. And a connector 67 comprising a connector concave portion 66 and the connector convex portion 65 on the cover portion 12 side of the outer tube 6.
Further, the connector concave portion 66 is supported on the inner tube 5 side, and when the connector convex portion 65 and the concave portion 66 are separated, the lead wire 64 connected to the connector convex portion 65 is left and supported by the cover portion 12 on the outer tube 6 side. You may do so. In this case, the connector 67
By separating the outer tube 6, the outer tube 6 and the inner tube 5 can be easily formed into a divided body, and the packing and storage can be made compact.

FIG. 14 is a diagram showing another embodiment of the present invention. In this embodiment, each end of the electric wire 70 and the lead wire 71 that respectively communicate with the connection terminal 13 and the connection terminal 14 of the outer tube 6 and the inner tube 5 is attached to the fitting end side of each of the tubes 6 and 5. Connected to the provided coupler convex 72 and fogging concave 73, respectively,
When the extension pipe 1 is extended, the coupler convex 72 and the coupler concave 7
3 is connected. According to this configuration,
Electricity is supplied only when the extension tube 1 is extended. However, since the structure of the power supply path 8 is extremely simple, manufacturing costs can be significantly reduced. In the drawings, reference numerals 10 and 12 denote covering portions of the outer and inner tubes.

In this embodiment, as shown in FIGS. 15 and 16, a hook 80 is provided on the back side of the extension tube 1 and a locking hole 81 is provided on the main body 2 side.
Is locked in the concave hole 81, so that the state can be stabilized without bulk when the cleaner is simply stored.

[0032]

【The invention's effect】

According to the second aspect of the present invention, the power supply line for electrically connecting the connection terminals provided on the inner tube and the outer tube is provided without being exposed to the outside and the dust passage. It is possible to improve the appearance, to prevent disconnection of the power supply line, and to prevent contact of dust and a conductive object passing through the dust passage with the power supply line,
There are effects such as improvement in durability and safety.

According to the third aspect of the present invention, the current-carrying rail and the conductive contact for electrically connecting the connection terminals respectively provided on the inner tube and the outer tube are exposed to the outside and the dust passage. Can be installed without any problem, the appearance can be improved, and the dust passing through the dust passage and the conductive object can be prevented from contacting the conductive rail, thereby improving the durability and safety. And the like.

According to the configuration of the fourth aspect of the present invention, the power supply line for electrically connecting the connection terminals provided on the inner tube and the outer tube is provided without being exposed to the outside and the dust passage. It is possible to improve the appearance, to prevent disconnection of the power supply line, and to prevent contact of dust and a conductive object passing through the dust passage with the power supply line,
There are effects such as improvement in durability and safety.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an extension tube of the present invention.

FIG. 2 is a partially omitted plan view of FIG. 1;

FIG. 3 is an enlarged sectional view taken along the line AA and a sectional view taken along the line BB of FIG. 1;

FIG. 4 is an overall external view of the vacuum cleaner of the present invention.

FIG. 5 is a side sectional view of an extension tube according to another embodiment of the present invention.

FIG. 6 is a partially omitted plan view of FIG. 5;

FIG. 7 is an enlarged sectional view of a main part of FIG. 5;

8 is an enlarged perspective view of a main part of FIG.

FIG. 9 is an explanatory diagram showing another embodiment of the present invention.

FIG. 10 is an explanatory diagram showing another embodiment of the present invention.

FIG. 11 is an explanatory diagram showing another embodiment of the present invention.

FIG. 12 is an explanatory diagram showing another embodiment of the present invention.

FIG. 13 is an explanatory view showing another embodiment of the present invention.

FIG. 14 is an explanatory diagram showing another embodiment of the present invention.

FIG. 15 is an explanatory diagram showing another embodiment of the present invention.

FIG. 16 is an explanatory diagram showing another embodiment of the present invention.

FIG. 17 is an overall external view showing a conventional technique.

18 is an enlarged sectional view of a main part of FIG. 17;

19 is a detailed sectional view of a main part of FIG. 18;

FIG. 20 is a cross-sectional perspective view of a main part of a conventional technique.

FIG. 21 is a detailed sectional view of a main part of FIG. 20;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Extension pipe 2 Vacuum cleaner main body 4 Hose 5 Inner pipe 6 Outer pipe 7 Electric suction tool 8 Power supply path 10 Cover 12 Cover

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiro Morita 2-18-18 Keihanhondori, Moriguchi-shi Sanyo Electric Co., Ltd. (72) Inventor Mitsuru Nishizawa 2-18-18 Keihanhondori, Moriguchi-shi Sanyo Electric Co., Ltd. In-house (56) References JP-A 64-31063 (JP, U) JP-A 63-150660 (JP, U) JP-A 1-59562 (JP, U) (58) Fields surveyed (Int.Cl) . ^6, DB name) A47L 9/28 A47L 9/24

Claims (3)

(57) [Claims] 1. A cleaner body having an electric blower and a dust collecting chamber, a hose connected to an inlet of the cleaner body, an extension pipe connected to the hose, and an electric motor connected to the extension pipe. and a suction device, wherein the extension pipe, and consists of an outer tube having a connection terminal at one end, a slidable inner pipe relative to outer tube has a connection terminal at one end, the outer and inner tubes Placed around
Connect both ends of the feeder cable to both connection terminals and slide the inner pipe.
In the operating state, current can flow between both connection terminals and
Part of the power supply line is housed on the outer circumference of either the pipe or the inner pipe
And the other of the outer tube and the inner tube
A power supply line exposed from the storage chamber is covered on the outer periphery, and the storage
An electric vacuum cleaner characterized by providing a removable cover in a chamber . 2. A cleaner body having an electric blower and a dust collecting chamber, a hose connected to an inlet of the cleaner body, an extension pipe connected to the hose, and an electric motor connected to the extension pipe. A suction tool, wherein the extension pipe comprises: an outer pipe having a connection terminal at one end; and an inner pipe slidable with respect to the outer pipe having a connection terminal at one end. either one of the outer peripheral side is defined as Tsuchiriro provided covered storage chamber at covering body, into the housing chamber, along with housing a power rail having one end connected to the connection terminal, the inner and outer tubes the outer peripheral side is partitioned from the Tsuchiriro the other tube provided covered storage chamber at covering body, disposed conductive contacts in sliding contact with the energized rail to the storage chamber, wherein
An electric vacuum cleaner comprising: urging means for urging a conductive contact toward a current-carrying rail . 3. A cleaner body having an electric blower and a dust collecting chamber, a hose connected to a suction port of the cleaner body, an extension pipe connected to the hose, and an electric motor connected to the extension pipe. A suction tool, the extension pipe comprises an outer pipe having a connection terminal at one end, and an inner pipe having a connection terminal at one end and slidable with respect to the outer pipe ; With the outer circumference of the inner pipe
A cover is provided with an interval between the inner tube outer circumference and the cover.
With winding a feed line having one end connected to the connection terminal, arranged feed line having one end in the outer tube periphery and the other end to the connection terminal is connected to the feed line, the feed to the outer tube periphery A cover for covering the electric wire is provided , and the outer tube is disposed between the outer periphery of the inner tube and the cover.
An electric vacuum cleaner characterized by being slidable on the vacuum cleaner.