JP2589338B2 - Vacuum cleaner suction pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a vacuum cleaner such as an extension pipe having a built-in high-voltage electric wire for supplying power to a motor for driving a rotary brush built in a suction opening. In particular, the present invention relates to a structure of a detachable electrical connection portion for relaying a high-voltage electric wire.

(Prior art) Recently, with the spread of carpets in ordinary households,
There is a need for an improved cleaning tool, and a suction port provided with a rotating brush driven by an electric motor is used. Since the electric motor of this suction body needs a power supply of 100V,
Conventionally, a high-voltage power supply for power supply in the cleaner body and a high-voltage electric wire provided in a hose detachably connected to the cleaner body are connected through an outlet provided in the cleaner body, and A high-voltage electric wire consisting of a normal power cord is held along the outside of the extension pipe detachably interposed between the cleaner body and the suction port body, and both ends of the high-voltage electric wire are connected to the electric wire in the hose. A structure is adopted in which each is detachably connected to a high-voltage electric wire provided in the suction port body and supplies power to the electric motor in the suction port body from the cleaner body.

However, in this conventional structure, the operability of attaching and detaching the hose, the extension tube, and the suction port body is poor. Therefore, two types of extension tubes with built-in electric wires having the following structures are used.

One is that the whole or a part of the extension pipe main body in which the air flow path is formed inside and the tapered pipes for fitting and connecting are fixed to both ends is 2.
A power receiving terminal connected to the electric wire and a pin-shaped power receiving terminal covered by a cylindrical sleeve body. Side terminals are provided at both ends. In this structure, since the pin-shaped power receiving side terminal is covered by the sleeve body, and naturally, the power supply side terminal is provided so as not to be exposed, so that the power is supplied before the connection between the extension tubes is completed. Even when the side terminal and the power receiving side terminal are in contact with each other, there is no possibility that the human body directly touches the high voltage part, and although the safety is high, the weight is large and the operability is difficult,
Also, the productivity is poor.

The other is to integrally form the extension pipe main body having an air flow path inside and the tapered pipe section for fitting connection by injection molding, etc., and form an electric wire storage part on one side of the outer peripheral surface of the extension side main body. A power supply side terminal and a pin-shaped power receiving side terminal are respectively connected to both ends of the electric wire accommodated in the storage portion, and locking devices are provided at both ends, and the electric wire, the terminal, and the locking device are provided. Is covered with a cover body, and the distal end side of the pin-shaped power receiving terminal protrudes outward from the cover body. In this structure, the extension pipe main body and the tapered pipe part can be integrally molded, so that the weight can be made relatively light,
Although it is excellent in manufacturability, since a certain contact length is required between the power supply side terminal and the power receiving side terminal, it is necessary to connect the extension pipes, the extension pipe and the hose, or the extension pipe and the suction port body. At a stage where there is a gap between the contact surfaces of the extension pipes or the like before the connection is completed, that is, the end face pipe of the cover body, the pin-shaped power receiving side terminal whose leading end side is exposed and the power supply side terminal come in contact with each other. Therefore, there is a risk of a short circuit or the like.

On the other hand, as described in, for example, Japanese Utility Model Application Laid-Open No. Sho 62-151849, a wall-shaped protection is provided near the end of an extension tube having a pin-shaped terminal exposed to the outside to protect the terminal. The structure which provided the wall is also taken. However, when the protection wall is provided, the pin-shaped terminal is hidden by the protection wall, and the positioning of the pin-shaped terminal with the terminal of the other pipe to which the extension pipe provided with the protection wall is connected is performed. Is difficult, and the connectivity becomes complicated.

(Problems to be Solved by the Invention) As described above, in the suction tube of the conventional vacuum cleaner, for example, the extension tube in which the pin-shaped power receiving side terminal is exposed, although the structure is simple, the extension tubes are connected to each other. In doing so, before the connection is completed, that is, at a stage where the power receiving terminal is still slightly exposed, the power receiving terminal comes into contact with the power supply terminal, which may cause a short circuit or the like. Furthermore, Akira Kai
As described in Japanese Patent Application Laid-Open No. 62-151849, there is a problem that the connectivity is reduced only by providing the protective wall.

The present invention is intended to solve such a problem, and has a simple structure and good manufacturability, and a suction of a built-in electric wire type vacuum cleaner having good connectivity without a risk of short-circuiting at the time of connection. It is intended to provide a tube.

(Means for Solving the Problems) The suction pipe of the vacuum cleaner according to claim 1 is provided with an air flow path therein, and has a tapered fitting concave portion and a tapered fitting that are removably fitted to each other. A plurality of substantially cylindrical suction pipe main bodies provided with one of the protrusions at the end, a cover body attached to the outer peripheral side of these suction pipe main bodies, and provided on the outer peripheral side of the fitting concave portion of the suction pipe main body. A clamp having an engaging portion detachably engaged with an engaged portion provided on the outer peripheral side of the fitting convex portion of the suction pipe main body, and between the respective suction pipe main bodies and the respective cover bodies. A plurality of high-voltage wires, a plurality of power-supply-side terminals provided between the fitting recess of the suction pipe main body and the cover, and connected to the high-voltage wires,
The distal end side projects outward between the fitting convex portion of the suction pipe main body and the cover body, and is arranged side by side in the circumferential direction, is connected to the high-voltage electric wire, and comes into contact with and separates from the power supply side terminal in a freely detachable manner. A plurality of power receiving side protruding terminals to be provided, and one of the fitting concave side and the fitting convex side of the suction pipe main body or the cover body is provided with the plurality of power receiving side protruding terminals on the outer peripheral side from the power receiving side protruding terminal. A protruding piece located between the power receiving side terminals is provided, and a concave portion in which the protruding piece is fitted is provided on the other side, and the protruding piece and the concave portion are fitted with the fitting concave portion and the fitting convex portion. In this case, the movement length from the start of the fitting between the projecting piece and the concave portion to the completion of the fitting of the fitting concave portion and the fitting convex portion is determined from the start of the contact between the power supply side terminal and the power receiving side projecting terminal. The length of movement between the mating concave portion and the mating convex portion until the mating is completed is increased, and the mating between the projecting piece and the concave portion is performed. And performs circumferential positioning between the power supply side terminal and the receiving-side protruding terminal.

The suction pipe of the vacuum cleaner according to claim 2 is the suction pipe of the vacuum cleaner according to claim 1, wherein the projecting piece has an outer peripheral side of the power-receiving-side protruding terminal at a fitting convex portion provided with the power-receiving-side protruding terminal. The power-receiving-side protruding terminals are located inside a plane that passes through the both side edges of the protruding piece and is in contact with the outer peripheral surface of the fitting protrusion.

According to a third aspect of the present invention, there is provided the suction pipe of the vacuum cleaner according to the first or second aspect, wherein the clamp also serves as the projecting piece.

(Operation) In the suction pipe of the vacuum cleaner according to claim 1, when the suction pipe main bodies are connected to each other, the tapered fitting convex portion at one end of the suction pipe main body is connected to the end of the other suction pipe main body. Of the fitting concave side, and the protruding piece provided on one of the fitting concave side and the fitting convex side is fitted into the concave part provided on the other side. The projecting terminal on the mating convex side is brought into contact with the terminal on the feeding side to electrically connect the high-voltage wires provided between the suction pipe main bodies and the covers attached to the outer peripheral side of the suction pipe main bodies. At the same time, the engaging portions of the clamps on the fitting concave portion side are engaged with the engaged portions on the fitting convex portion side to lock both suction pipe main bodies. At this time, before the fitting of the fitting concave portion and the fitting convex portion is completed, and before the power receiving side protruding terminal whose front end side protrudes outward starts to contact the power supply side protruding terminal, a plurality of power receiving terminals arranged in the circumferential direction are arranged. Since the protruding piece provided on the outer peripheral side between the side protruding terminals starts to fit into the concave portion, the outer peripheral side of the power receiving side protruding terminal when the power receiving side protruding terminal and the power supply side protruding terminal are in contact with each other. Since no gap is formed in the terminal, short-circuiting of the different-polarity terminal is prevented. In addition, by fitting the protruding piece and the concave portion, it is possible to position the power supply side terminal and the power receiving side protruding terminal in the circumferential direction, and to perform the axial guide at the time of connection of both suction pipe main bodies, thereby facilitating the connection work. It will be easier.

According to a second aspect of the present invention, in the suction pipe of the vacuum cleaner according to the first aspect, the suction pipe is connected to the suction pipe body by providing a protruding piece on a fitting convex portion having a power receiving side protruding terminal. Even in a state where the power-receiving-side protruding terminal is not protected, the power-receiving-side protruding terminal is protected by a protruding piece that is always located on the outer peripheral side of the power receiving-side protruding terminal,
For example, by positioning the power-receiving-side protruding terminal inside a plane passing through each side edge of the protruding piece and being in contact with the outer peripheral surface of the fitting protrusion, any linear edge is fitted from the side edge of the protruding piece. Even if it hits the outer peripheral surface of the projection, it does not hit the power receiving side protruding terminal and is protected.

The suction pipe of the vacuum cleaner according to the third aspect is the suction pipe of the vacuum cleaner according to the first or second aspect, in which the projecting piece is also used as a clamp. By using a different color for the protruding pieces, the discrimination is improved, and the connection work becomes easier.

(Embodiment) Hereinafter, a configuration of a suction pipe of a vacuum cleaner according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 6.

First, the overall configuration of the vacuum cleaner will be described with reference to FIG.

Reference numeral 1 denotes a main body of the cleaner. Inside the main body 1 of the cleaner, an electric blower (not shown), a dust collecting chamber communicating with a suction side of the electric blower, a control circuit for controlling the electric blower, a power cord which can be freely inserted and removed, and the like. Is provided. In addition, the cleaner body 1
A connection port 2 is provided on the upper surface of the device to face the dust collection chamber. Further, although not shown, a reception terminal electrically connected to the control circuit and a power supply terminal electrically connected to the power cord are provided near the connection port 2.

On the other hand, 6 is a hose as a suction pipe.
Is a spiral bellows-shaped flexible hose body 7, an insertion pipe 8 provided at one end of the hose body 7 and removably inserted and connected to the connection port 2 of the cleaner body 1.
And a gripping tube 9 provided at the other end of the handle.
A handle portion 10 is formed on the gripping tube 9 and a cover body 11 is attached to the outer peripheral side on the upper side in the figure, and an operation control section 12 is provided on the cover body 11. Although not shown, the insertion tube 8 is provided with a transmission terminal and a power reception terminal which are detachably connected to the reception terminal and the power supply terminal of the cleaner body 1, respectively. . The transmission terminal is electrically connected to the control operation unit 12 via a piano wire provided in a spiral shape in the hose body 7 and holding the shape of the hose body 7. The power receiving side terminal is connected to a power supply provided at the distal end of the grip tube 9 via a high-voltage power supply line for supplying power of a 100 V AC power supply provided along the piano wire in the hose body 7 and the control operation unit 12. It is electrically connected to the side terminal.

Further, reference numeral 16 denotes a suction port body, and a suction port (not shown) is formed in the suction port body 16 on the lower surface thereof, and
A joint pipe 17 as a suction pipe communicating with the suction port is rotatably provided at a rear portion. Although not shown, a rotary brush is rotatably supported in the suction port body 16 facing the suction port, and an electric motor for rotating and driving the rotary brush is provided. Further, a power receiving side terminal is provided at a distal end portion of the joint pipe 17, and the power receiving side terminal is provided in the suction port body 16 via a high-voltage wire disposed in the joint pipe 17. It is electrically connected to a control circuit for the electric motor.

On the other hand, 21 is an extension pipe as a suction pipe.
The rear end is detachably connected to the front end of the gripping tube 9 or the front end of another extension tube 21, and the front end is detachably connected to the rear end of the other extension tube 21 or the front end of the joint tube 17. It is connected to.

Next, the configuration of the extension pipe 21 of the first embodiment will be described with reference to FIGS.

Reference numeral 22 denotes an extension pipe main body serving as a suction pipe main body. The extension pipe main body 22 is formed in a substantially cylindrical shape, and has an air passage 23 inside. And inside the front end of the extension pipe main body 22,
A tapered fitting concave portion 24 whose diameter increases toward the tip is integrally formed. On the outer side of the rear end portion of the extension pipe main body 22, a fitting projection 25 having a tapered shape whose diameter is reduced toward the tip and having a shape detachably fitted in the fitting recess 24 is integrally formed. Is formed. Further, a cover body 26 is attached so as to cover almost half of the outer peripheral side of the extension pipe main body 22. The cover body 26 has one end face coincident with the distal end face of the fitting recess 24, and the other end face is located at the base end of the fitting projection 25, and the step surface including the other end face of the cover body 26 is provided. 27 is formed on the outer peripheral portion of the extension tube 21 so as to be substantially perpendicular to the axial direction.

In a space 31 between the outer peripheral surface of the extension pipe main body 22 and the cover body 26, a pair of high-voltage electric wires 32 are provided along the axial direction of the extension pipe 21. A pair of leaf spring-like power supply terminals 33 is supported and fixed in the space 31 at the end of the fitting recess 24 side.
Are connected to each other. Then, a through hole is formed in the end face of the extension pipe body 22 so as to face each of the two power supply terminals 33.
An opening 34 is formed, and an end face portion is a recess 35 at a portion where the through hole 34 is formed. On the other hand, a pair of round pin-shaped power-receiving-side protruding terminals that are located at the end on the side of the fitting convex portion 25 and that come into contact with the two power-supply-side terminals 33 such as the other extension tubes 21 so as to be able to freely contact and separate from each other. 36 are supported and fixed along the circumferential direction in parallel with the axial direction of the extension tube 21.
The other end of each high-voltage electric wire 32 is connected to 36.
The two receiving-side projecting terminals 36 have their distal ends projecting outward through the step surface 27 of the extension tube 21.
The portion where the power-receiving-side protruding terminal 36 protrudes is a protruding portion 37 fitted into the recess 35.

Further, at an end of the space portion 31 on the side of the fitting concave portion 24, a clamp 41 for locking is swingably supported by a support shaft 42 between the two power supply terminals 33. Has a claw-shaped engaging portion 43 formed at the tip end of the fitting concave portion 24, and an operating portion 44 formed at the opposite end. The engaging portion 43 faces the opening 45 formed at the tip of the fitting recess 24, and the operating portion 44 projects outward from the opening 46 formed in the cover body 26. .
Further, the clamp 41 is configured such that the engagement portion 43 is extended by the spring 47.
It is biased in the direction approaching the central axis of 21. On the other hand, the engaging portion 43 of the clamp 41 such as the other extension tube 21 is detachably engaged with the outer peripheral surface of the base end portion of the fitting convex portion 25 between the two power receiving side projecting terminals 36. A projection-shaped engaged portion 48 is formed.

When the fitting projection 25 is fitted into the fitting recess 24 of the other extension tube 21, the inner peripheral surface of the fitting recess 24 is airtight on the outer peripheral surface of the intermediate portion of the fitting projection 25. A rubber rubber-like seal packing 49 that is in close contact with is fitted.

Further, a through hole 34 is formed in the end surface of the cover body 26 on the side of the fitting concave portion 24.
A tongue-shaped protruding piece 51 is formed on the outer peripheral side so as to protrude outward in the axial direction of the extension tube 21. On the other hand, at the end of the cover body 26 on the side of the fitting protrusion 25, the outer peripheral side and the step surface 27 are located between the integral power receiving side protruding terminals 36, 36 on the outer peripheral side of the power receiving side protruding terminal 36. A concave portion 52 is formed, which is opened to fit the protruding piece 51. The projecting length of the projecting piece 51 is longer than the length of the exposed portion of the power receiving side projecting terminal 36. As shown in FIG. 1, when the fitting concave portion 24 and the fitting convex portion 25 are fitted coaxially, the fitting of the projecting piece 51 and the recess portion 52 starts from the fitting recess 24 side. The moving length A (hereinafter referred to as the fitting length of the protruding piece 51 and the concave portion 52) until the end surface of the extension tube 21 or the like abuts against the step surface 27 of another extension tube 21 or the like is equal to the power supply side terminal 33. Movement length B from the start of contact with the power receiving side protruding terminal 36 to the end surface on the fitting concave portion 24 side abutting against the step surface 27 (hereinafter referred to as the electrical contact length between the power supply side terminal 33 and the power receiving side protruding terminal 36). (A
> B). Further, as shown in FIG. 5, the two through holes 34 facing the power supply side terminal 33 are planes passing through both side edges of the protruding piece 51 and in contact with the inner peripheral surface of the fitting recess 24, and are formed from the protruding piece 51. Are also located inside the two planes that meet on the outer peripheral side.

The tip of the grip tube 9 of the hose 6 has the same structure as the end of the extension tube 21 on the fitting recess 24 side. The distal end of the joint pipe 17 of the suction port body 16 has the same structure as the end of the extension pipe 21 on the side of the fitting projection 25. Therefore, in FIG. 6, the gripping pipe 9 and the joint pipe 17 also
1, the concave portion 52 and the operating portion 44 of the clamp 41 are denoted by the same reference numerals as those of the extension tube 21.

 Next, the operation of the first embodiment will be described.

For cleaning, vacuum cleaner body 1, hose 6, and extension pipe
21 and the suction port body 16 are connected to each other. For example, when connecting the extension tubes 21 to each other, the fitting recess 24 of one of the extension tubes 21
The fitting protrusion 25 of the other extension tube 21 is fitted into the power supply side terminal, and accordingly, the power receiving side protruding terminal 36 on the fitting protrusion 25 side is inserted into the through hole 34 on the fitting recess 24 side, so that the power supply side terminal The high pressure electric wires 32 in both extension pipes 21 are electrically connected to each other while sliding. At the same time, the engaging portion of the clamp 41 on the fitting recess 24 side
43 is engaged with the engaged portion 48 on the fitting projection 25 side,
21 is locked. When the connection is completed, the step surface 27 on the fitting projection 25 side is brought into contact with the end face of the extension tube 21 on the fitting recess 24 side.

At this time, the projecting piece 51 on the fitting concave portion 24 side is fitted into the concave portion 52 on the fitting convex portion 25 side, but the fitting length A between the projecting piece 51 and the concave portion 52 is Is longer than the electrical contact length B between the power supply side terminal 33 and the power receiving side protruding terminal 36.
Before the contact starts, the protruding piece 51 located on the outer peripheral surface of the power receiving side protruding terminal 36 starts to be fitted into the recess 52. Therefore, in a state where the power receiving side protruding terminal 36 and the power supply side terminal 33 are in contact with each other, a gap is provided between the end surfaces of the cover bodies 26 of the extension tubes 21 located on the outer peripheral side between the pair of power receiving side protruding terminals 36, 36. Has not occurred. That is, at a stage where there is still a gap on the outer peripheral side between the pair of power receiving side protruding terminals 36, 36,
Since the power-receiving-side protruding terminal 36 is not in contact with the power-supplying-side terminal 33, even if the user accidentally puts a finger or skin in the above-described gap during connection, there is no electric shock, and the connection is safe. Of course, even if a gap is formed at a position other than the outer peripheral side of the power receiving side protruding terminal 36 with the skin or the like interposed therebetween, there is no danger of electric shock.

Further, by fitting the protruding piece 51 and the recess 52, the circumferential position of the power supply side terminal 33 and the power receiving side protruding terminal 36 can be easily determined, and the axial direction when the extension pipes 21 and 21 are connected. Can be performed, and connection work becomes easy.

Further, in addition to the relationship between the fitting length and the electrical contact length described above, a pair of flat surfaces 1 where the pair of power receiving side projecting terminals 36, 36 pass through the both side edges of the projecting piece 51 and contact the inner peripheral surface of the fitting recess 24. With the pair of extension tubes 21 connected halfway, the power-supply-side terminal 33 comes into contact with the power-receiving-side protruding terminal 36 and is fitted to the end face of the extension tube 21 on the fitting concave portion 24 side. There is still a gap between the step surface 27 on the mating convex portion 25 side, but the projecting piece 51 is in the concave portion.
In the state fitted to 52, as shown in FIG.
Even if 56, a wire, a plastic sheet, or the like is inserted into the above-mentioned gap, or a wire is wound around the above-mentioned gap, the metal piece 56, etc., comes into contact with both the power receiving side projecting terminals 36, 36 at the same time. Not only there is no problem, but also there is little risk of touching even one of them, short circuit can be prevented, and the safety is extremely high. The same applies to a case where a metal piece 56 has been forcibly inserted between the extension tubes 21 in a state where the connection between the extension tubes 21 has been completed, such as during cleaning.

Further, for example, when connecting the extension pipes 21 to each other,
If the circumferential positional relationship between the two is not regular, as shown in FIG.
In a state in which the protruding piece 51 abuts halfway, the protruding piece 51 abuts against the step surface 27 on the side of the protruding portion 25 of the extension tube 21.
Are longer than the exposed portions of the power-receiving-side protruding terminals 36, and therefore, these terminals 36 do not hit the end surfaces of the extension tubes 21 on the fitting recess 24 side. Therefore, the power receiving side protruding terminal 36 is not damaged.

Further, since the protruding piece 51 and the concave portion 52 serve as a guide for circumferential alignment when connecting the extension tubes 21 and the like, the workability of the connection is good.

Then, at the time of cleaning, suction is performed from the cleaner body 1 side through the high-voltage wire 32 relayed by the power supply side terminal 33 and the power reception side protruding terminal 36 along the hose 6, the extension pipe 21 and the joint pipe 17. A 100 V AC power supply is supplied to the electric motor in the mouth body 16, and the electric motor is driven to rotate the rotating brush and scrape dust from the carpet. The scraped-out dust is sucked from the suction port body 16 by the drive of the electric blower in the cleaner body 1, and collected in the cleaner body 1 through the extension pipe 21 and the air passage 23 in the hose 6. Guided to the room.
At this time, the user can turn on / off the electric motor in the suction opening body 16 by operating the control operation unit 12 provided on the gripping pipe 9 of the hose 6, and suck the electric blower in the cleaner body 1. The power can be adjusted. That is, the signal output from the control operation unit 12 is transmitted to the control circuit in the cleaner main body 1 via the piano wire in the hose 6, and the electric blower is controlled.

Although the fitting concave portion 24 and the fitting convex portion 25 are in close contact with each other by taper fitting, the sealing packing 49 provided on the fitting convex portion 25 further ensures airtightness. ing.

Further, even during cleaning, for example, even if a force is applied to the extension tubes 21 in a direction in which the extension tubes 21 are rotated and twisted with each other, the fitting of the protruding pieces 51 and the recesses 52 causes the two extension tubes 21 and 21 to move. Since they are mutually prevented from rotating, the power supply side terminal 33 and the power reception side protruding terminal 36 are not damaged, and the durability is high.

After cleaning, the cleaner body 1, the hose 6, and the extension pipe 21
When the extension tubes 21 are detached from each other, for example, the operating portion 44 of the clamp 41 is pressed against the urging force of the spring 47, and the engaging portion 43 of the clamp 41 is engaged with the engaged portion. The fitting projection 25 may be pulled out of the fitting recess 24 while being removed from the fitting 48.

Next, a second embodiment of the present invention will be described with reference to FIG. 9 and FIG.

In the second embodiment, the entirety of the locking clamp 41 is exposed on the outer surface of the cover body 26, and the engaging portion 43 of the clamp 41 is
Is also used as the protruding piece 51 protruding from the end face of the extension tube 21 on the fitting recess 24 side. An engaged portion 48 to which the engaging portion 43 formed on the protruding piece 51 is detachably engaged is formed on the bottom surface of the concave portion 52 on the fitting convex portion 25 side. Note that the support shaft 42 of the clamp 41 is rotatably supported by being deformed and fitted into a bearing hole 57 formed integrally with the extension pipe main body 22.

According to the configuration of the second embodiment, the clamp 41 has a simple structure because the regulation of the rotation stroke is reduced.
Manufacturability can be improved and strength can be improved. Further, since it is easy to make the integral protruding piece 51 and the clamp 41 the same color and make the separate clamp 41 and the cover body 26 different colors, it is possible to easily make the color arrangement that makes the protruding piece 51 stand out. In this manner, if the protruding piece 51, that is, the clamp 41 is made to have a different color from the cover body 26, the discriminability can be improved, and the circumferential alignment at the time of connecting the extension tubes 21 and the like becomes easier,
Usability can be improved.

11 and 12 show a third embodiment and a fourth embodiment, respectively, of the present invention. In these embodiments, the outer surface of the projecting piece 51 on the fitting recess 24 side is Convex part
The silk screen or engraving is used to display the alignment and extend the extension pipe to the position near the recess 52 on the outer surface of the cover body 26 on the 25 side.
Display units 58, 59 for indicating the connection direction such as 21
Is provided.

According to this structure, when connecting the extension tubes 21 and the like, the user can easily recognize the connection position, the direction, and the like. That is, at the time of connection, the protrusion 51 and the recess 52 serve as a guide for physical positioning depending on the shape thereof, and can be positioned by the display units 58 and 59. Therefore, misuse can be prevented,
Usability is improved and it can be used with confidence.

Next, a fifth embodiment of the present invention will be described with reference to FIGS.

In the fifth embodiment, a projecting piece 51 is formed on the end face of the cover body 26 on the side of the fitting projection 25, on the outer peripheral side between the pair of power receiving side projecting terminals 36, 36. On the other hand, a recess 52 into which the protruding piece 51 is fitted is formed at the end of the cover body 26 on the fitting recess 24 side. As in the first embodiment, the length of the projecting piece 51 is longer than the length of the projecting terminal 36 on the power receiving side. Also, as shown in FIG.
Is longer than the electrical contact length B between the power supply side terminal 33 and the power receiving side projecting terminal 36. In addition, the 17th
As shown in the figure, the pair of power receiving side projecting terminals 36
Are located inside two planes l passing through both side edges of the fitting projection 25 and contacting the outer peripheral surface of the fitting projection 25 and intersecting the projecting piece 51 on the outer peripheral side.

According to the configuration of the fifth embodiment, the same operation and effect as those of the first embodiment can be obtained.
Since the exposed portion of 36 is always located between the fitting projection 25 and the protruding piece 51, even when the extension tube 21 is not connected, the power receiving side protruding terminal 36 is protected and its breakage can be prevented. . And since both power receiving side protruding terminals 36, 36 are located between the planes passing through both side edges of the protruding piece 51 and being in contact with the outer peripheral surface of the fitting convex portion 25, any linear end edge is protruded. Even if it hits the side edge of 51 and the outer peripheral surface of the fitting projection 25, it does not hit the power receiving terminal 36.

In each of the above embodiments, the width of the protruding piece 51 may be set to a size that covers the entirety of both the power receiving side protruding terminals 36, 36.
The smaller the width of the protruding piece 51, the easier the molding.

FIG. 18 shows a sixth embodiment of the present invention. In this embodiment, pin-shaped power-receiving-side protruding terminals 36, 36 are made substantially rectangular in front, and one side of these power-receiving-side protruding terminals 36, 36 is fitted. Joint convex part 2
5 is in contact with the outer peripheral surface.

According to this structure, since the area of the pin-shaped power-receiving-side protruding terminals 36 in contact with the extension tube body 22 is large, the stability of the power-receiving-side protruding terminals 36, 36 is good, and the durability against external compression is enhanced. In addition, the power receiving side projecting terminal 36 is not damaged due to bending or the like, and the reliability can be improved.

(Effect of the Invention) According to the suction pipe of the vacuum cleaner according to the first aspect, the suction pipe is fitted to the fitting recess side of the suction pipe main body or the cover body having the detachable fitting recess or the fitting projection at the end. One of the protrusions is provided with a protruding piece that is located between the plurality of power receiving side protruding terminals on the outer peripheral side from the plurality of power receiving side protruding terminals arranged in the circumferential direction with the distal end side protruding outward, and the other protruding piece is A concave portion to be fitted is provided, and a movement length from the start of fitting of the projecting piece to the concave portion to the completion of fitting of the fitting concave portion and the fitting convex portion is determined by the distance between the power supply side terminal and the power receiving side projecting terminal. The movement length from the start of contact to the completion of the fitting between the fitting concave portion and the fitting convex portion is made longer, and the circumferential positioning of the power supply side terminal and the power receiving side protruding terminal is performed by fitting the projecting piece and the concave portion. Therefore, even before the mating is completed, when the power supply side terminal and the power receiving side There is no gap on the outer peripheral side of the output terminal, a simple structure can prevent short-circuiting of different-polarity terminals without deteriorating manufacturability, improve safety, and improve the circumference when connecting the suction pipe bodies. Direction, and the connection work becomes easy.

According to the suction pipe of the vacuum cleaner according to the second aspect, in addition to the effect of the suction pipe of the vacuum cleaner according to the first aspect, since the protruding piece is provided on the power receiving side protruding side, the suction pipe main body is not connected. The protruding piece that is always located on the outer peripheral surface of the power receiving side protruding terminal including the state can protect the power receiving side protruding terminal,
By positioning the power-receiving-side protruding terminal inside the plane that passes through the both side edges of the protruding piece and is in contact with the outer peripheral surface of the fitting convex portion, the power that is received from the side edge of the protruding piece to the outer peripheral surface of the fitting convex portion is received. It can be prevented from hitting the side protruding terminals, and these power receiving side protruding terminals can be more reliably protected.

According to the suction pipe of the vacuum cleaner according to the third aspect, in addition to the effect of the suction pipe of the vacuum cleaner according to the first or second aspect, the projecting piece is also used as a clamp, so that the structure can be simplified, It is also easy to make the protruding pieces a different color, so that the discriminability is improved and the connection operation can be made easier.

[Brief description of the drawings]

FIG. 1 is a plan view of a connection portion showing a first embodiment of a suction pipe of a vacuum cleaner of the present invention, FIG.
FIG. 3 is a perspective view of the same fitting concave portion, FIG. 4 is a perspective view of the same fitting convex portion, FIG. 5 is a front view of the same fitting concave portion, and FIG.
The figure is an overall perspective view of the vacuum cleaner using the suction pipe,
7 and 8 are perspective views for explaining the operation of the embodiment, FIG. 9 is a cross-sectional view of a connecting portion showing a second embodiment of the present invention, FIG. 10 is a perspective view of the connecting portion, and FIG. FIG. 12 is a plan view of a connecting portion showing a third embodiment of the present invention, FIG. 12 is a plan view of a connecting portion showing a fourth embodiment of the present invention, and FIG. 13 is a plan view of a connecting portion showing a fifth embodiment of the present invention. FIG. 14 is a cross-sectional view of the connection portion,
FIG. 15 is a perspective view of the same fitting concave portion, FIG. 16 is a perspective view of the same fitting convex portion, FIG. 17 is a front view of the same fitting convex portion, and FIG.
The figure is a front view of the fitting projection showing the sixth embodiment of the present invention. 6 ... Hose as suction pipe, 11 ... Cover body, 17 ...
Fitting pipe as suction pipe, 21 ... Extension pipe as suction pipe,
22 ... Extension pipe body as suction pipe body, 23 ... Air flow path, 24 ... Fit recess, 25 ... Fit projection, 26 ... Cover body, 32 ... High voltage electric wire, 33 ... Power-supply-side terminal, 36 ... power-receiving-side protruding terminal, 41 ... clamp, 43 ... engaging part, 48 ... engaged part, 51 ... protruding piece, 52 ... concave part.

Claims (3)

(57) [Claims] A plurality of substantially cylindrical shaped members having an air flow passage therein and one of a tapered fitting concave portion and a tapered fitting convex portion detachably fitted to each other at an end thereof. A suction pipe main body, a cover attached to an outer peripheral side of the suction pipe main body, and provided on an outer peripheral side of a fitting concave portion of the suction pipe main body and provided on an outer peripheral side of a fitting convex portion of the suction pipe main body. A clamp having an engaging portion detachably engaged with the engaged portion; a plurality of high-voltage wires provided between each of the suction pipe main bodies and each of the cover bodies; and a fitting of the suction pipe main body A plurality of power-supply-side terminals provided between the mating recess and the cover body and connected to the high-voltage electric wire; and a tip end projecting outward between the fitting protrusion of the suction pipe main body and the cover body. Connected to the high-voltage electric wire and connected to and separated from the power supply terminal. A plurality of power-receiving-side protruding terminals that are in contact with the suction pipe main body or the cover body. A protruding piece is provided between the plurality of power receiving side terminals, and a recessed portion is provided on the other side, in which the protruding piece is fitted. The movement length from the start of the fitting between the projecting piece and the recessed part at the time of fitting to the completion of the fitting of the fitting concave part and the fitting convex part is determined from the start of the contact between the power supply side terminal and the power receiving side projection terminal. The moving length of the fitting concave portion and the fitting convex portion is larger than the movement length until the fitting is completed, and the fitting of the projecting piece and the recess portion causes the circumferential direction between the power supply side terminal and the power receiving side projecting terminal. A suction pipe for a vacuum cleaner, which performs positioning. 2. The projecting piece is provided on the side of the fitting projection provided with the power receiving side projecting terminal on the outer peripheral side of the power receiving side projecting terminal, and these power receiving side projecting terminals respectively pass through both side edges of the projecting piece. The suction pipe for a vacuum cleaner according to claim 1, wherein the suction pipe is located inside a plane that is in contact with an outer peripheral surface of the fitting projection. 3. The suction pipe of an electric vacuum cleaner according to claim 1, wherein the clamp also serves as a protruding piece.