JP2006158742A - Connection structure for extension pipe of vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection structure for an extension pipe of a vacuum cleaner which can prevent a connection part between the extension pipe and a bent pipe from being played or damaged. <P>SOLUTION: A hand pipe 2 is formed of an inner pipe 21 externally fitted to the top end part of the extension pipe 1 and a hand pipe body 22 housing the inner pipe 21. The inner pipe 21 has a cylindrical fitting part 21a externally fitted to the extension pipe 1 and a curved part 21b which is connected with the fitting part 21a and curved. The hand pipe body 22 is turnably connected with one end of a hose connection pipe 3 communicating with the inner pipe 21, and has a handle 23 which is branched from a part housing the inner pipe 21 and extending nearly in parallel to the axis of the hose connection pipe 3. The inner pipe 21 is formed of resin harder than resin forming the hand pipe body 22. Since the tip part of the extension pipe 1 is externally fitted by the fitting part 21a of the inner pipe and the inner pipe 21 is housed in the hand pipe body 22, the extension pipe 1 is connected firmly with the hand pipe 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a connection structure for an extension pipe of a vacuum cleaner, for example, a connection structure between a bent pipe and the other end of an extension pipe to which a vacuum cleaner body is connected at one end.

  Conventionally, as a connection structure of an extension pipe of a vacuum cleaner, one end of a bent pipe having a handle is connected to the other end of the extension pipe connected to the suction port body or the main body of the vacuum cleaner. There exists what connected the hose to the other end (for example, Unexamined-Japanese-Patent No. 2002-209803: patent document 1).

  The other end of the extension tube and one end of the bent tube are detachably connected by a clamp provided on the bent tube side.

However, the connection structure of the extension pipe of the conventional vacuum cleaner has a problem that the durability is relatively poor. That is, when one end of the extension pipe is connected to the vacuum cleaner body, the vacuum cleaner body having a relatively large weight is pushed and pulled through the extension pipe by an operator holding the handle of the bent pipe. Therefore, a relatively large stress is generated at the connecting portion between the extension tube and the bent tube. However, since the connecting portion between the extension tube and the bending tube is only connected by the clamp, there is a problem that rattling is likely to occur due to relatively large stress. Furthermore, as a result of the vacuum cleaner being used for a long period of time and repeatedly receiving a relatively large stress, the connecting portion between the extension pipe and the bent pipe may be damaged.
JP 2002-209803 A

  Then, the subject of this invention is providing the connection structure of the extension pipe | tube of the vacuum cleaner which can prevent the backlash and damage of the connection part between an extension pipe | tube and a bending pipe | tube.

In order to solve the above problems, the connection structure of the extension pipe of the vacuum cleaner of the present invention is:
A substantially straight extension tube made of metal,
A resin-made resin that has a handle and a ventilation path with a curved portion inside, and is fitted around the distal end portion of the extension pipe so that the distal end of the extension pipe is positioned almost immediately before the curved section of the ventilation path. A bending tube of
One end is connected to the end of the bent tube that is opposite to the side that fits the extension tube, and the other end includes a hose coupling portion that is formed with a hose accommodating portion that accommodates the tip portion of the hose. It is a feature.

  According to the above configuration, since the bent tube is externally fitted to the tip portion of the metal extension tube so that the tip of the extension tube is positioned almost immediately before the curved portion of the ventilation path of the bent tube. The distal end portion of the extension tube is firmly connected to the bent tube. Therefore, for example, an electric vacuum cleaner main body is connected to the end of the extension pipe opposite to the side externally fitted to the bent pipe, the handle of the bent pipe is held by an operator, and the electric vacuum cleaner main body is Even in the case of being pushed and pulled, it is effectively prevented that the connection portion between the extension tube and the bent tube is rattled or damaged.

  Moreover, since the said ventilation path has a curved part, the said bending pipe can bend between the said extension pipe and a hose. Accordingly, the main body of the vacuum cleaner and the suction port body are connected to the end of the extension pipe opposite to the side fitted to the bent pipe, and the gripping portion of the bent pipe is held by the operator for cleaning. When the operation is performed, good operability can be obtained.

  In addition, since the resin-made bending tube in which the bending portion is formed relatively easily is connected to the metal extension tube, which is relatively difficult to bend, the electric cleaning for bending between the extension tube and the hose. The connection structure of the extension pipe of the machine can be easily formed.

  In the connection structure of the extension pipe of the vacuum cleaner of one embodiment, the inner surface of the curved portion of the ventilation path of the bent pipe is smoothly bent.

  According to the embodiment, since the inner side surface of the bent portion of the ventilation path of the bent pipe is smoothly bent, the flow resistance of the suction air flowing through the ventilation path can be effectively reduced.

  In one embodiment of the connection structure of the extension pipe of the vacuum cleaner, the bent pipe is externally fitted to the distal end portion of the extension pipe and accommodates the middle pipe that forms the curved portion of the ventilation path, and the middle pipe And a bent tube body having the handle portion.

  According to the embodiment, the intermediate pipe is fitted on the distal end portion of the extension pipe and is accommodated in the bent pipe main body, so that the extension pipe and the bent pipe can be firmly connected. Therefore, even if the extension pipe receives a relatively large force, it is possible to effectively prevent the rattling or breakage between the extension pipe and the bent pipe.

  In addition, since the intermediate pipe that is externally fitted to the distal end portion of the extension pipe can be formed separately from the bent pipe main body, a bent pipe composed of the intermediate pipe and the bent pipe main body can be easily manufactured.

  In the connection structure of the extension pipe of the vacuum cleaner of one embodiment, the middle pipe of the bent pipe is formed of a resin having a hardness higher than that of the resin forming the bent pipe main body.

  According to the above embodiment, since the hardness of the intermediate pipe that is externally fitted to the extension pipe is made higher than the hardness of the bent pipe body that accommodates the intermediate pipe, the entire bent pipe is manufactured from a resin having a relatively high hardness. Rather, the cost of the bent tube can be reduced while strengthening the connection between the extension tube and the bent tube.

In the connection structure of the extension pipe of the vacuum cleaner of one embodiment, the bent pipe has a locking portion that locks into a through hole provided in the extension pipe,
There is provided a seal member that seals both between the locking portion and the extension tube, and between the end portion of the bent tube that is fitted on the extension tube and the extension tube.

  According to the embodiment, the bent tube and the extension tube are connected to each other so as not to rotate and to be separated from each other by the engaging portion of the bent tube. The seal member seals both the locking portion and the extension tube, and the end portion of the bent tube that is fitted on the extension tube and the extension tube. Therefore, the extension pipe connection structure can be configured with a small number of parts, and leakage of the suction air between the extension pipe and the bent pipe can be prevented.

  As described above, the connecting structure of the extension pipe for electric cleaning according to the present invention has a bent pipe at the tip of the metal extension pipe, and the tip of the extension pipe almost immediately before the curved portion of the ventilation path of the bent pipe. So that the extension tube and the bent tube can be firmly connected by the tip portion of the extension tube, for example, opposite to the side of the extension tube that is externally fitted to the bent tube. Even when the vacuum cleaner body is connected to the end of the side, the handle of the bent tube is gripped by the operator, and the vacuum cleaner body is pushed and pulled, the extension tube and the bent tube It is possible to effectively prevent the connection portion from rattling or breaking.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

  FIG. 1 is a cross-sectional view showing a connection structure of an extension pipe of a vacuum cleaner as an embodiment of the present invention, and FIG. 2 is an exploded perspective view showing a connection structure of the extension pipe of the vacuum cleaner.

  The extension pipe connection structure of the vacuum cleaner includes a metal extension pipe 1, a hand pipe 2 as a bent pipe having one end connected to the tip of the extension pipe 1, and the other end of the hand pipe 2. It has a hose coupling part 3 to which one end is connected. The other end of the hose connecting portion 3 is formed so that the tip portion of the hose 4 is connected.

  The extension pipe 1 is made of aluminum as an example of metal and has a substantially straight shape. A through hole 11 is formed on the peripheral surface of the extension pipe 1.

  The hand pipe 2 includes a middle pipe 21 that is externally fitted to the extension pipe 1, and a hand pipe body 22 as a bent pipe body that accommodates the middle pipe 21.

  The middle pipe 21 includes a cylindrical fitting portion 21a that is fitted around the distal end portion of the extension pipe 1, and a curved portion 21b that is continuous with the fitting portion 21a and curves to form a part of the ventilation path. Have. The middle pipe 21 and the proximal pipe body 22 are both made of resin, and the middle pipe 21 is made of a resin having a hardness higher than that of the resin of the proximal pipe body 22. Specifically, the hand pipe main body 22 is made of impact-resistant ABS (Acrylonitrile-Butadiene-Styrene) resin, and the middle pipe 21 is made of POM (polyoxymethylene).

  A through hole 25 is formed in the peripheral surface of the fitting portion 21a of the middle pipe.

  An opening 22a is formed at one end of the hand pipe main body 22, and the middle pipe 21 is formed so as to be fitted into an inner side surface continuous with the opening 22a. On the inner side surface of the hand pipe main body 22, a protrusion 25 is integrally formed in the vicinity of the opening 22a as a locking portion protruding inward. The projection 25 engages with the through hole 11 of the extension pipe and the through hole 25 of the middle pipe, so that the extension pipe 1 and the middle pipe 21 cannot rotate with respect to the hand pipe main body 22. Connected inseparable.

  A seal member 27 is provided between the inner side surface of the hand pipe main body 22 and the outer side surface of the middle pipe 21. The seal member 27 has a ring portion 27a surrounding the vicinity of the opening of the fitting portion 21a of the middle pipe, and a tongue portion 27b extending from the ring portion 27a in the axial direction of the fitting portion 21a of the middle pipe. And the through-hole 28 is formed in this tongue part 27b. The through hole 28 is formed so that the projection 25 of the hand pipe main body 22 penetrates. The seal member 27 has a substantially L shape in a side view. The ring portion 27a of the sealing member seals between the inner side surface of the proximal pipe body 22 and the vicinity of the opening of the fitting portion 21 of the middle pipe. At the same time, the tongue 27b of the seal member seals between the projection 25 of the hand pipe main body and the through hole 25 of the middle pipe through which the projection 25 passes.

  A handle 23 is formed integrally with the hand pipe main body 22. The handle 23 branches from a portion accommodating the middle pipe 21 of the hand pipe main body 22 in a direction inclined with respect to the axis of the fitting portion 21a of the middle pipe 21, and the shaft of the hose connecting portion 3 It extends substantially in parallel. An operation switch 7 is provided near the base of the handle 23. A signal line (not shown) electrically connected to the operation switch 7 and wired in the hand pipe body 22 is connected to a vacuum cleaner body (not shown) via a signal line (not shown) provided on the hose. . Based on the operator's input to the operation switch 7, the operation of the vacuum cleaner body is controlled.

  An opening 22b is formed at the other end of the hand pipe main body 22, and a hand pipe connecting portion 31 of a hose connecting portion is accommodated on an inner surface continuous to the opening 22b. The hand pipe connecting portion 31 is formed at one end of the hose connecting portion 3, and a seal member 34 for sealing the outer side surface of the hand pipe connecting portion 31 and the inner side surface of the hand pipe main body 22 is provided at the tip. It has been. An engagement flange 31 a that engages with a projection (not shown) provided on the inner surface of the hand pipe main body 22 is formed on the outer peripheral portion of the hand pipe connecting portion 31. It is connected to be rotatable and non-separable.

  The distal end of the curved portion 21 b of the middle pipe and the distal end of the proximal pipe coupling portion 31 of the hose coupling portion communicate with each other within the inner side surface of the proximal pipe main body 22.

  The other end of the hose connecting portion 3 that protrudes from the other end of the proximal pipe body 22 is a hose connecting portion 32 in which a spiral groove is formed on the inner surface. The hose 4 is formed so that the inner surface of the hose connecting portion 32 is engaged with the outer peripheral surface of the tip of the hose 4 so that the hose 4 is connected.

  According to the connection structure of the extension pipe of the vacuum cleaner, the extension pipe 1, the curved portion 21b of the intermediate pipe, the hand pipe connection portion 31 of the hose connection pipe, and the hose 4 are connected to each other inside. This forms a ventilation path that guides the intake air. The ventilation path smoothly curves between the distal end of the extension pipe 1 and the distal end of the hose connection pipe 3 by the curved portion 21b of the middle pipe.

  FIG. 3 is a cross-sectional view showing a vacuum cleaner having an extension pipe connection structure having the above-described configuration. The end of the hose 4 opposite to the side connected to the hand pipe 2 is connected to the vacuum cleaner body 51 of the vacuum cleaner. Further, an end of the extension pipe 1 opposite to the side connected to the hand pipe 2 is connected to the upper side surface of the electric vacuum cleaner main body 51. At the end of the extension tube 1 on the side of the vacuum cleaner main body 51, an auxiliary suction port having a brush attached to the extension tube 1 and having a brush at the tip is provided. A main body ventilation path 52 connected to the extension pipe 1 is formed in the electric vacuum cleaner body 51, and the main body ventilation path 52 communicates with an opening 53 formed on the bottom surface of the electric vacuum cleaner body 51. Yes. The electric cleaning main body 51 includes an electric blower 55 that generates a flow of suction air and a cord reel 56 that winds a power cord. The vacuum cleaner body 51 is detachably connected with a cyclone dust collector 58 that separates and collects dust from the sucked air. This vacuum cleaner is an upright type vacuum cleaner in which a suction port (not shown) having a traveling wheel is connected to the opening 53 and the handle 23 of the hand pipe is held by an operator to perform a cleaning operation.

  The cyclone dust collector 58 includes a cylindrical dust collection case 61, and a cyclone main body 62 connected to the opening end of the dust collection case 61. The cyclone main body 62 has an exhaust cylinder 64 protruding into the dust collection case, and a filter body 65 that filters air sucked from the exhaust cylinder 64. On the side surface of the dust collecting case 11 on the side of the main body of the vacuum cleaner, an opening 66 that guides sucked air is provided.

  The vacuum cleaner having the above-described configuration operates as follows.

  First, a suction port body is connected to the opening 53 on the bottom surface of the electric vacuum cleaner main body 51. When the handle 23 is gripped by the operator and the power switch is turned on with the suction port of the suction port facing the floor surface, the electric blower 55 of the vacuum cleaner body 1 is activated. As a result, the suction air flows through the suction port body, the main body ventilation path 52, the extension pipe 1, the hand pipe 2, the hose connecting portion 3 and the hose 4, and dust from the floor surface is drawn from the suction port of the suction port body. Is sucked. The sucked air is introduced together with dust into the dust collecting case 61 from the opening 66 of the dust collecting case 61, and a relatively large dust among the dusts is separated by the swirl flow generated in the dust collecting case 61. Is done. The suction air from which relatively large dust has been separated is guided to the filter body 65 through the exhaust pipe 64 of the cyclone main body 62, and minute dust is removed by the filter body 65 and discharged from the electric vacuum cleaner main body 51. Is done. In this way, the cleaning operation by the electric vacuum cleaner is performed.

  On the other hand, when cleaning a narrow space such as between a furniture and a wall, or cleaning an upper portion of a room such as a wall surface or a ceiling, the end of the extension pipe 1 on the side connected to the main body 51 of the vacuum cleaner The portion is extracted, and the auxiliary suction port body fitted around the end portion of the extension tube 1 is projected to the distal end side of the extension tube 1. The auxiliary suction port body faces a surface to be cleaned such as a floor surface in a narrow space or a ceiling surface, and the dust on the surface to be cleaned together with the suction air extends from the auxiliary suction port body to the extension pipe 1 and the hand pipe. 2. Collect in the vacuum cleaner main body 51 via the hose connecting part 3 and the hose 4.

  The vacuum cleaner main body has a relatively large weight through the hand pipe 2 formed with the handle 23 to be gripped by an operator and the extension pipe 1 connected to the hand pipe 2. 51 is pushed and pulled. Therefore, a relatively large stress is generated at the connecting portion between the extension pipe 1 and the proximal pipe 2. However, the fitting portion 21a of the middle pipe is fitted on the tip portion of the extension tube 1 so that the tip of the extension tube 1 is positioned almost immediately before the curved portion 21b connected to the outer fitting portion 21a. is doing. Further, the middle pipe 21 accommodates the hand pipe main body 22. The middle pipe 21 is made of a resin having a hardness higher than that of the resin forming the hand pipe main body 22. Therefore, the distal end portion of the extension pipe 1 can be firmly connected to the hand pipe 2. Thereby, although the electric vacuum cleaner main body 51 having a relatively large weight is pushed and pulled through the extension pipe 1, the connection portion between the extension pipe 1 and the hand pipe 2 is rattled or damaged. The inconvenience which arises can be prevented effectively.

  Further, since the middle pipe 21 can be formed separately from the hand pipe body 22, the hand pipe 2 can be easily manufactured.

  The extension pipe 1, the bent portion 21b of the intermediate pipe, the proximal pipe connecting portion 31 of the hose connecting tube, and the ventilation path formed inside the hose 4 are formed by the bent portion 21b of the intermediate pipe. A portion between the tip of the extension pipe 1 and the tip of the hose connecting pipe 3 can be smoothly curved. Therefore, when the vacuum cleaner main body 51, the suction port body, the auxiliary suction port body, etc. are connected to the extension pipe 1 and the operator grips the grip portion 23 of the hand pipe and performs cleaning, the operator Good operability can be obtained.

  In addition, the curved portion 21b of the middle pipe can smoothly bend the portion between the tip of the extension pipe 1 and the tip of the hose connecting pipe 3 of the ventilation path, so that the intake air flowing through the ventilation path The flow resistance can be effectively reduced.

  Further, by the seal member 27 having the ring portion 27a and the tongue portion 27b, between the inner surface of the hand pipe main body 22 and the vicinity of the opening of the fitting portion 21 of the middle pipe, and the protrusion 25 of the hand pipe main body. And between the through hole 25 of the middle pipe through which the protrusion 25 passes can be sealed. Therefore, the extension pipe connection structure can be configured with a small number of parts, and the suction air leakage between the extension pipe 1 and the hand pipe 2 can be prevented.

  In addition, although the said proximal pipe 2 had the middle pipe 21 externally fitted to the said extension pipe 1, and the proximal pipe main body 22 which accommodates this middle pipe 21, the said middle pipe 21 may be abbreviate | omitted. That is, the distal end portion of the extension pipe 1 may be directly fitted on the hand pipe body.

  Moreover, the said vacuum cleaner may not be a cyclone type.

  Further, the electric vacuum cleaner may not be an upright type. For example, a suction port is attached to the tip of the extension pipe, and the main body is pulled through a hose connected to the extension pipe to perform cleaning. A canister-type vacuum cleaner may be used.

It is sectional drawing which shows the connection structure of the extension pipe | tube of the vacuum cleaner as embodiment of this invention. It is a disassembled perspective view which shows the connection structure of the extension pipe | tube of the vacuum cleaner of this embodiment. It is sectional drawing which shows the vacuum cleaner which has the connection structure of the extension pipe | tube of this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Extension pipe 2 Hand pipe 3 Hose connection part 4 Hose 21 Middle pipe 21a Middle pipe fitting part 21b Middle pipe curved part 25 Locking part 27 Seal member 27a Seal member ring part 27b Seal member tongue part

Claims (5)

A metal extension tube,
A resin-made resin that has a handle and a ventilation path with a curved portion inside, and is fitted around the distal end portion of the extension pipe so that the distal end of the extension pipe is positioned almost immediately before the curved section of the ventilation path. A bending tube of
One end is connected to the end of the bent tube that is opposite to the side that fits the extension tube, and the other end includes a hose coupling portion that is formed with a hose accommodating portion that accommodates the tip portion of the hose. The connecting structure of the extension pipe of the vacuum cleaner. In the connection structure of the extension pipe of the vacuum cleaner according to claim 1,
The connection structure of the extension pipe of the vacuum cleaner, wherein an inner side surface of the curved portion of the ventilation path of the bent pipe is smoothly bent. In the connection structure of the extension pipe of the vacuum cleaner according to claim 1,
The bent pipe has an intermediate pipe that is externally fitted to a distal end portion of the extension pipe, forms a curved portion of the ventilation path, and a bent pipe body that houses the intermediate pipe and has the handle portion. The connecting structure of the extension pipe of the vacuum cleaner. In the connection structure of the extension pipe of the vacuum cleaner according to claim 3,
The connecting structure of the extension pipe of the vacuum cleaner, wherein the middle pipe of the bent pipe is formed of a resin having a hardness higher than that of the resin forming the bent pipe main body. In the connection structure of the extension pipe of the vacuum cleaner according to claim 1,
The bent pipe has a locking portion that locks into a through hole provided in the extension pipe,
A seal member is provided that seals both between the locking portion and the extension tube, and between the end portion of the bent tube that is fitted on the extension tube and the extension tube. Connection structure of extension pipe of vacuum cleaner.

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