JP2014042734A - Extension pipe and vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extension pipe having high safety against electric leakage without any influence upon an insulating structure between a power line and a pipe body, and a vacuum cleaner .SOLUTION: An extension pipe 25 includes: an inner pipe body 42 made of carbon fiber contained resin; a cover back lid 96 made of an insulator and extending in the longitudinal direction of the inner pipe body 42; a second tunnel cover 95 made of an insulator for defining a second insulating chamber 98 extending from one end of the inner pipe body 42 to the other end in cooperation with the cover back lid 96; a power line 75 extending from one end of the inner pipe body 42 to the other end through the second insulating chamber 98; a hook 49 rocked to fix and unfix a suction port body 26 connected to the end of the inner pipe body 42; and a shaft part 117 held between the inner pipe body 42 and the second tunnel cover 95 to pivotally support the hook 49.

Description

  Embodiments according to the present invention relate to an extension tube and a vacuum cleaner.

  An extension pipe of a conventional vacuum cleaner generally includes a pipe body formed of polypropylene (PP) or ABS resin. The user of the electric vacuum cleaner operates a relatively long extension pipe having a length of about 1 m by gripping a grip portion of a hand control pipe connected to one end of the extension pipe. A suction port is provided at the other end of the extension pipe.

JP 2007-159661 A JP 2004-008239 A

  The light weight of the extension tube is an important factor that impresses the feeling of operation for the user of the vacuum cleaner.

  Therefore, in order to impress the user of the vacuum cleaner with a light operation feeling and increase the commercial value of the vacuum cleaner, it is possible to reduce the weight by applying carbon fiber-containing resin to the tube body material of the extension pipe. Conceivable.

  By the way, an extension pipe may be provided with the electric power line which transmits electric power from a vacuum cleaner main body to a suction inlet body. Since the carbon fiber-containing resin is an electrical conductor, if the carbon fiber-containing resin is applied to the material of the tube body, it is necessary to provide an electrical insulating structure between the power line and the tube body.

  On the other hand, the extension pipe is provided with a detachable joint structure at each end in order to connect adjacent structures such as a suction port. The joint structure includes a swingable hook for fixing or releasing the adjacent structure.

  Here, paying attention to the relationship between the hook of the joint structure and the insulating structure, when a load applied to the hook from an adjacent structure has an adverse effect on the insulating structure, the conventional extension pipe causes a problem in the insulating structure, and the power line There is a concern of leakage due to electrical connection with the pipe body.

  Then, an object of this invention is to provide the extension pipe | tube and vacuum cleaner with high safety | security with respect to an electrical leakage, without affecting the insulation structure between a power line and a pipe | tube main body.

  In order to solve the above problems, an extension pipe according to an embodiment of the present invention includes a pipe body made of carbon fiber-containing resin, a partition member made of an insulator extending in a longitudinal direction of the pipe body, and a cooperation with the partition member. And a tunnel cover made of an insulator for defining an insulating chamber extending from one end of the tube main body to the other end, and a power line extending from one end of the tube main body to the other end through the insulating chamber And a hook for fixing and releasing the adjacent structure connected to the end of the tube main body by swinging, and provided between the hook and sandwiched between the tube main body and the tunnel cover And a shaft portion that supports the hook in a swingable manner.

  The vacuum cleaner according to an embodiment of the present invention includes a vacuum cleaner body, an electric blower that is housed in the vacuum cleaner body and generates negative pressure, and the extension pipe that is fluidly connected to the electric blower. .

The perspective view which shows the external appearance of the vacuum cleaner which concerns on embodiment of this invention. The perspective view which decomposes | disassembles and shows the extension pipe | tube which concerns on embodiment of this invention. The longitudinal section showing the extension pipe concerning the embodiment of the present invention. The cross-sectional perspective view of an extension pipe which shows the joint structure of an outer pipe main part, a partition member, and a tunnel cover about an extension pipe concerning this embodiment. The perspective view which shows the bracket pair of the extension pipe which concerns on this embodiment. The perspective view which shows the principal part of the tunnel cover of the extension pipe which concerns on this embodiment. The perspective view which shows the coupling | bonding state of the bracket pair and partition member of the extension pipe which concern on this embodiment. The cross-sectional view of the extension pipe which shows the joint structure of an outer pipe main body, a partition member, and a tunnel cover about the extension pipe concerning this embodiment. The disassembled perspective view which shows the electric circuit expansion-contraction tube of the extension tube which concerns on this embodiment. The longitudinal cross-sectional view which shortens and shows the extension pipe | tube which concerns on this embodiment. The side view of the 1st fixing | fixed part and 2nd fixing | fixed part which show the other example of the coupling structure of an outer pipe | tube main body, a partition member, and a tunnel cover about the extension pipe which concerns on this embodiment. The side view of the 1st fixing | fixed part and 2nd fixing | fixed part which show the other example of the coupling structure of an outer pipe | tube main body, a partition member, and a tunnel cover about the extension pipe which concerns on this embodiment. The partial cross-sectional view of the extension pipe which shows the other example of the coupling structure of an outer pipe main body, a partition member, and a tunnel cover about the extension pipe concerning this embodiment.

  Embodiments of an extension pipe and a vacuum cleaner according to the present invention will be described with reference to FIGS. 1 to 13.

  FIG. 1 is a perspective view showing an external appearance of a vacuum cleaner according to an embodiment of the present invention.

  As shown in FIG. 1, the vacuum cleaner 1 according to the present embodiment is a so-called canister-type vacuum cleaner. The vacuum cleaner 1 includes a vacuum cleaner body 2 that can travel on a surface to be cleaned, and a pipe portion 3 that is detachable from the cleaner body 2.

  The vacuum cleaner main body 2 includes a main body case 5, a pair of wheels 6 disposed on both sides of the main body case 5, an electric blower 7 accommodated in the latter half portion of the main body case 5, and a front half portion of the main body case 5. A detachable dust separating and collecting unit 8 that is disposed, a main body control unit 9 that mainly controls the electric blower 7, and a power cord 11 that guides electric power to the electric blower 7 are provided.

  The main body case 5 includes a main body connection port 12 at a front end portion. The main body connection port 12 is a joint, and the pipe portion 3 can be attached and detached. It is a fluid inlet of the cleaner body 2, and fluidly connects the pipe portion 3 and the dust separation and dust collection portion 8.

  The electric blower 7 sucks air and generates negative pressure. This negative pressure acts on the pipe part 3 through the inside of the cleaner body 2 and the dust separation and collection part 8.

  The dust separating and collecting unit 8 separates, collects, and accumulates dust from the air flowing in by the negative pressure generated by the electric blower 7. On the other hand, the dust separating and collecting unit 8 sends clean air from which dust is removed to the electric blower 7. Note that air containing dust is referred to as “dusty air”.

  The main body control unit 9 includes a microprocessor (not shown), a storage device (not shown) that stores various arithmetic programs executed by the microprocessor, parameters, and the like. The storage device stores a plurality of operation modes set in advance. The plurality of operation modes set in advance correspond to user operations accepted by the pipe section 3. Each operation mode is set with different input values (input values of the electric blower 7). In response to a user operation accepted by the pipe unit 3, the main body control unit 9 selectively selects an arbitrary operation mode corresponding to the operation content from a plurality of preset operation modes and reads out from the storage unit The electric blower 7 is controlled according to the read operation mode.

  The power cord 11 supplies power to the cleaner body 2 from a wiring plug connector (not shown, so-called outlet). The power cord 11 has a plug 14 at the free end.

  The pipe portion 3 sucks dust-containing air from the surface to be cleaned by the negative pressure acting from the cleaner body 2 and guides it to the cleaner body 2. The pipe section 3 includes a connection pipe 19 as a joint that is detachable from the main body connection port 12 of the cleaner body 2, a dust collection hose 21 that is fluidly connected to the connection pipe 19, and a fluid connection to the dust collection hose 21. The hand operation tube 22 to be connected, the grip portion 23 protruding from the hand operation tube 22, the operation portion 24 provided on the grip portion 23, the extension tube 25 detachably attached to the hand operation tube 22, and the attachment / detachment to the extension tube 25 And a free suction port body 26.

  The connecting pipe 19 is fluidly connected to the dust separating and collecting part 8 through the main body connection port 12.

  The dust collection hose 21 is a long and flexible substantially cylindrical hose. One end of the dust collecting hose 21 (here, the rear end) is fluidly connected to the connecting pipe 19. The dust collecting hose 21 is fluidly connected to the dust separating and collecting part 8 through the connecting pipe 19.

  The hand control tube 22 connects the dust collecting hose 21 and the extension tube 25. One end (here, the rear end) of the hand operating tube 22 is fluidly connected to the other end (here, the front end) of the dust collecting hose 21. The hand operating tube 22 is fluidly connected to the dust separating and collecting part 8 through the dust collecting hose 21 and the connecting tube 19 in order.

  The grip portion 23 is a portion that can be gripped by the user's hand in order to operate the vacuum cleaner 1. The grip portion 23 has an appropriate shape that can be easily gripped by the user's hand and protrudes from the hand operation tube 22.

  The operation unit 24 includes a switch associated with each operation mode. Specifically, the operation unit 24 includes an activation switch 24 a associated with an operation start operation of the electric blower 7 and a stop switch 24 b associated with an operation stop operation of the electric blower 7. The start switch 24 a and the stop switch 24 b are electrically connected to the main body control unit 9. A user of the vacuum cleaner 1 can alternatively select an operation mode of the electric blower 7 by operating the operation unit 24. The start switch 24a also functions as an operation mode selection switch during operation of the electric blower 7. In this case, every time the operation signal is received from the activation switch 24a, the main body control unit 9 switches the operation mode in the order of strong → medium → weak → strong →. Note that the operation unit 24 may include a weak operation switch (not shown), a medium operation switch (not shown), and a strong operation switch (not shown) instead of the start switch 24a.

  The extension tube 25 is an elongated substantially cylindrical tube that can be expanded and contracted. The extension tube 25 has a telescopic structure in which a plurality of cylindrical bodies are overlapped. One end portion (here, the rear end portion) of the extension tube 25 and the other end portion (here, the front end portion) of the hand operation tube 22 have a detachable joint structure. The extension pipe 25 is fluidly connected to the dust separating and collecting part 8 through the hand operation pipe 22, the dust collecting hose 21 and the connecting pipe 19. The extension tube 25 may be a fixed length that does not expand and contract or a tube in which a plurality of fixed length tubes are connected.

  The suction port body 26 has a structure capable of running or sliding on a surface to be cleaned such as a wooden floor or a carpet, and has a suction port 28 on the bottom surface facing the surface to be cleaned in the running state or the sliding state. The suction port body 26 includes a rotatable rotary cleaning body 29 disposed in the suction port 28 and an electric motor 31 that drives the rotary cleaning body 29. One end portion (here, the rear end portion) of the suction port body 26 and the other end portion (here, the front end portion) of the extension pipe 25 have a detachable joint structure. The suction port body 26 is fluidly connected to the dust separating and collecting part 8 through the extension pipe 25, the hand operating pipe 22, the dust collecting hose 21 and the connecting pipe 19.

  The vacuum cleaner 1 starts the electric blower 7 when the operation with respect to the starting switch 24a is received. For example, when the vacuum cleaner 1 receives an operation on the start switch 24a in a state where the electric blower 7 is stopped, the electric blower first operates the electric blower 7 in the strong operation mode and receives an operation on the start switch 24a again. 7 is operated in the medium operation mode, and when an operation on the start switch 24a is accepted three times, the electric blower 7 is operated in the weak operation mode, and the same is repeated thereafter. The strong operation mode, the medium operation mode, and the weak operation mode are a plurality of operation modes set in advance, and the input value to the electric blower 7 is small in the order of the strong operation mode, the medium operation mode, and the weak operation mode. The started electric blower 7 exhausts air from the dust separating and collecting part 8 and makes the inside of the negative pressure (suction negative pressure).

  The negative pressure of the dust separating and collecting part 8 is applied to the suction port 28 of the suction port body 26 through the dust separating and collecting part 8, the main body connection port 12, the connecting pipe 19, the dust collecting hose 21, the hand operating pipe 22 and the extension pipe 25. Works. The vacuum cleaner 1 cleans the surface to be cleaned by sucking dust on the surface to be cleaned together with air with a negative pressure acting on the suction port 28. The dust separating and collecting unit 8 separates and accumulates dust from the dust-containing air sucked into the vacuum cleaner 1. On the other hand, the dust separating and collecting unit 8 sends the air separated from the dust-containing air to the electric blower 7. The electric blower 7 exhausts the air sucked from the dust separating and collecting part 8 to the outside of the cleaner body 2.

  Next, the extension pipe 25 will be described in detail.

  FIG. 2 is an exploded perspective view showing the extension pipe according to the embodiment of the present invention.

  As shown in FIG. 2, the extension tube 25 according to the present embodiment includes an outer tube main body 41 having a long length with respect to the tube diameter, and an inner tube that can be drawn out or stored in the tube of the outer tube main body 41. A tube main body 42.

  The outer tube main body 41 and the inner tube main body 42 are molded products of carbon fiber-containing resin, specifically, polypropylene containing carbon fibers, and are also electrical conductors.

  A joint portion 43 connected to the hand operation tube 22 is provided at one end of the outer tube main body 41. The inner pipe main body 42 is inserted into the other end of the outer pipe main body 41. A tunnel portion 45 is provided on the outer periphery of the other end portion of the outer tube main body 41. The tunnel portion 45 is opened in the longitudinal direction of the outer tube main body 41.

  The outer tube main body 41 includes a plurality of, for example, four pairs of brackets 46 and 47 provided on the outer surface thereof and arranged substantially parallel to the longitudinal direction of the outer tube main body 41. The bracket pairs 46 and 47 extend from the side edges of the tunnel portion 45 in the opening direction. The bracket pairs 46 and 47 face each other and face each other when viewed in the circumferential direction of the outer tube main body 41. Note that the bracket pairs 46 and 47 may be arranged in a staggered manner when viewed in the non-facing and non-facing positions, that is, in the longitudinal direction of the outer tube main body 41.

  The inner tube main body 42 has an outer diameter slightly smaller than the inner diameter of the outer tube main body 41.

  One end of the inner tube main body 42 is inserted into the tube of the outer tube main body 41. The other end of the inner tube main body 42 remains outside the outer tube main body 41 even when the inner tube main body 42 is inserted into the outer tube main body 41 most deeply. 26 is provided with a joint portion 48 connected to 26.

  The joint portion 48 includes a hook 49 that fixes or unfixes the extension pipe 25 to the suction port body 26, and a protective cover 50 that protects the joint portion 48. The hook 49 is pressed by the coil spring 51 in a direction to fix the suction port body 26 which is an adjacent structure. Further, the protective cover 50 expands toward the other end of the inner pipe main body 42 (the end to which the suction port body 26 is connected).

  Next, a connecting portion between the outer tube main body 41 and the inner tube main body 42 will be described.

  The extension tube 25 includes a first guide ring 52 that is inserted into the tube of the outer tube main body 41, a second guide ring 53 that is provided at the other end of the outer tube main body 41, a first guide ring 52, and a second guide. A seal ring 55 sandwiched between the ring 53 and a stopper 57 provided on the inner pipe main body 42 are provided.

  The first guide ring 52 and the second guide ring 53 guide the movement of the inner tube main body 42 with respect to the outer tube main body 41.

  The second guide ring 53 includes a flange portion 58 that fits the opening end of the tunnel portion 45. The flange portion 58 has an opening 59 connected to the hollow portion of the tunnel portion 45.

  The seal ring 55 prevents air outside the extension pipe 25 from flowing into the pipe from between the inner peripheral face of the outer pipe main body 41 and the outer peripheral face of the inner pipe main body 42.

  The stopper 57 is fixed to a stopper fixing portion 61 provided at one end of the inner pipe main body 42. The stopper 57 is a detent for preventing the rotation of the inner tube main body 42 relative to the outer tube main body 41 and a retaining for preventing the inner tube main body 42 from coming out of the outer tube main body 41.

  Next, the power line housing structure on the outer tube main body 41 side will be described.

  The extension pipe 25 has an insulating partition member 62 extending in the longitudinal direction of the outer tube main body 41 as a power line housing structure on the outer tube main body 41 side, an insulating first tunnel cover 63 covering the partition member 62, and Is provided.

  The partition member 62 and the first tunnel cover 63 are molded products of hard synthetic resin such as polypropylene (PP) or ABS resin, and are also insulators.

  The first tunnel cover 63 extends from one end of the outer tube main body 41 to the other end. The first tunnel cover 63 has a tunnel member 65 that is long in the longitudinal axis direction of the outer tube main body 41 and an end that sandwiches and fixes the end of the tunnel member 65 on the joint portion 43 side in cooperation with the outer tube main body 41. A part cover 66.

  The screw 67 fastens the end cover 66 and the tunnel member 65 together with the boss 68 of the outer tube main body 41, and connects one end of the first tunnel cover 63 (the end close to the joint 43) to the outer tube main body. 41 is fixed. The pair of fixed pieces 69 penetrates the fixed hole 71 of the tunnel member 65 and is fitted into the fixed hole 72 of the outer tube main body 41, and the other end of the first tunnel cover 63 (the outer tube main body 41 and the inner tube main body). 42) is fixed to the outer tube main body 41. The fixing hole 72 is disposed in the tunnel portion 45 of the outer tube main body 41.

  Next, the power line housing structure on the inner tube main body 42 side will be described.

  The extension pipe 25 includes a tunnel inner pipe 73 provided in the inner pipe main body 42 as a power line housing structure on the inner pipe main body 42 side. The tunnel inner pipe 73 extends from the vicinity of the joint portion 48 of the inner pipe main body 42 toward the outer pipe main body 41 and reaches the tunnel portion 45. The tunnel inner pipe 73 moves together with the inner pipe main body 42 and is pulled out from the first tunnel cover 63 or stored in the first tunnel cover 63.

  The power line housing structure on the outer tube body 41 side and the power line housing structure on the inner tube body 42 side cooperate to insulate the power line 75 over the entire length of the extension tube 25.

  Next, the power line 75 housed in the power line housing structure of the outer tube main body 41 and the inner tube main body 42 will be described.

  The extension pipe 25 includes a power line 75 that feeds power from the cleaner body 2 side, more specifically, from the hand operation pipe 22 to the suction port body 26.

  The power line 75 has a coil spring-like structure over its entire length and can be expanded and contracted. The power line 75 is accommodated in the sheath 76. The sheath 76 is a molded product of a synthetic resin, for example, polyethylene (PE), and is an insulator. The sheath 76 is shorter than the total length of the first tunnel cover 63 or the total length of the tunnel inner pipe 73 and is integrated with the first tunnel cover 63 and does not hinder expansion and contraction of the extension pipe 25. In other words, if the extension tube 25 is extended, the power line 75 becomes longer than the sheath 76 and protrudes. The power line housing structure of the extension tube 25 insulates the power line 75 protruding from the sheath 76 from the outer tube main body 41 and the inner tube main body 42. At each end of the power line 75, a socket 77 or a plug 78 is provided for electrical connection with the hand operating tube 22 or the suction port body 26.

  In addition, the extension pipe 25 includes a full length adjusting mechanism 79 that positions and temporarily fixes the full length of the expansion and contraction stepwise. The full length adjustment mechanism 79 includes a full length adjustment switch 81 provided in the outer pipe main body 41 and a plurality of positioning full length adjustment recesses 82 provided in the tunnel inner pipe 73 of the inner pipe main body 42.

  The positioning full length adjusting recesses 82 are arranged at substantially equal intervals in the longitudinal direction of the tunnel inner tube 73, and thus in the longitudinal direction of the inner tube main body 42 and the extension tube 25, and temporarily fix the length of the extension tube 25 at each position. , Allowing adjustment of the overall length.

  FIG. 3 is a longitudinal sectional view showing the extension pipe according to the embodiment of the present invention.

  First, a connecting portion between the outer tube main body 41 and the inner tube main body 42 will be described.

  As shown in FIG. 3, the outer tube main body 41 of the extension tube 25 according to the present embodiment is predetermined from the end surface of the end portion on the side where the inner tube main body 42 is inserted (that is, the other end portion of the outer tube main body 41). A large inner diameter portion 83 having an inner diameter larger than that of the other portions is provided over the entire depth. The first guide ring 52, the second guide ring 53, and the seal ring 55 are sandwiched between the inner peripheral surface of the large inner diameter portion 83 and the outer peripheral surface of the inner pipe main body 42 and are accommodated in the large inner diameter portion 83.

  A guide groove 85 extending in the longitudinal direction is provided in the tube of the outer tube main body 41. The stopper 57 fixed to the inner tube main body 42 is sandwiched between the guide grooves 85 and restricts relative rotation between the outer tube main body 41 and the inner tube main body 42.

  Further, the outer tube main body 41 includes a partition portion 86 that partitions the large inner diameter portion 83 and the guide groove 85. The partition portion 86 restricts the movement range of the stopper 57 and prevents the inner tube main body 42 from coming out of the outer tube main body 41.

  The full length adjustment switch 81 of the full length adjustment mechanism 79 includes a box-shaped pressing portion 87 that opens toward the tunnel portion 45, a pair of arms 88 that are provided integrally with the pressing portion 87 and that are spaced apart from each other, and the tunnel inner pipe 73. A pin 89 that can be inserted into and removed from the positioning full length adjustment recess 82, and a coil spring 91 that presses the pressing portion 87 in a direction in which the pin 89 is fitted into the positioning full length adjustment recess 82.

  The pressing portion 87 includes a pair of shaft portions 92 extending on the same line. The shaft portion 92 is disposed on a bearing portion (not shown) including a bearing half on the tunnel portion 45 side and a bearing half on the first tunnel cover 63 side, and supports the pressing portion 87 so as to be swingable. The push-down portion 87 swings in a seesaw shape around the shaft portion 92 to fix or release the entire length of the outer tube main body 41 and the inner tube main body 42 in a plurality of stages.

  The arm 88 sandwiches the pin 89, and the pin 89 is fitted into the positioning full length adjustment concave portion 82 or pulled out from the positioning full length adjustment concave portion 82 as the pressing portion 87 swings.

  The user of the extension pipe 25 oscillates the push-down portion 87 by pushing down the push-down portion 87 against the coil spring 91, pulls out the pin 89 from the positioning full length adjustment recess 82 via the arm 88, and The outer tube main body 41 and the inner tube main body 42 are fixed against each other, and the extension tube 25 is expanded and contracted.

  Next, the power line storage part of the outer tube main body 41 will be described.

  The first tunnel cover 63 covers the partition member 62 and cooperates with the partition member 62 to define a first insulating chamber 93 extending from one end portion of the outer tube main body 41 to the other end portion. The first insulating chamber 93 is isolated from the inside of the outer pipe main body 41, that is, from the pipe passage through which the dust-containing air passes, and is electrically isolated from the outer pipe main body 41 itself and disconnected.

  Next, the power line storage part of the inner pipe main body 42 will be described.

  The tunnel inner pipe 73 extends in a cantilever shape toward the outer pipe main body 41 with an end fixed to the joint portion 48 of the inner pipe main body 42 as a base, and enters the first insulating chamber 93 of the outer pipe main body 41. Plugged in. The tunnel inner pipe 73 passes through the tunnel portion 45 of the outer pipe main body 41 through the opening 59 of the second guide ring 53 and reaches the first insulating chamber 93.

  The tunnel inner pipe 73 includes a second tunnel cover 95 located on the outer side in a direction crossing the longitudinal axis direction of the inner pipe main body 42 (the radial direction of the inner pipe main body 42), and a cover back cover 96 facing the inner pipe main body 42. And comprising.

  The second tunnel cover 95 and the cover back cover 96 are molded products of a synthetic resin such as polypropylene (PP) or ABS resin, and are also insulators.

  The second tunnel cover 95 includes a hook cover portion 97 that supports the hook 49 in cooperation with the inner pipe main body 42.

  The cover back cover 96 plays the same role as the partition member 62 for the first tunnel cover 63 with respect to the second tunnel cover 95. That is, the cover back cover 96 defines the second insulating chamber 98 in which the power line 75 is disposed in cooperation with the second tunnel cover 95. The second insulating chamber 98 is isolated from the inside of the inner pipe main body 42, that is, from the pipe passage through which the dust-containing air passes, and is electrically isolated from the inner pipe main body 42 itself and disconnected. The second insulating chamber 98 is connected to the first insulating chamber 93 on the outer tube main body 41 side.

  The socket 77 connected to the power line 75 is accommodated in the tunnel inner tube 73 at the other end of the tunnel inner tube 73 (the end closer to the joint portion 48). The socket 77 is electrically connected to a plug (not shown) on the hand operating tube 22 side inserted into the second insulating chamber 98 when the joint portion 48 is connected to the suction port body 26 which is an adjacent structure. The The cover back cover 96 includes a plug insertion hole 99 for allowing the plug on the hand operation tube 22 side to reach the socket 77.

  Next, one end portion of the first tunnel cover 63 (the end portion on the side close to the joint portion 43 of the outer pipe main body 41) will be described.

  The plug 78 connected to the power line 75 protrudes from the first insulating chamber 93 along the longitudinal direction of the outer tube main body 41 at one end of the first tunnel cover 63 (end close to the joint portion 43). . The plug 78 is sandwiched between the first tunnel cover 63 and the partition member 62. The plug 78 is inserted into a socket (not shown) on the side of the hand operating tube 22 and electrically connected with the connection of the joint portion 43 to the hand operating tube 22 that is an adjacent structure.

  Next, a coupling structure of the outer tube main body 41, the partition member 62, and the first tunnel cover 63 will be described.

  FIG. 4 is a cross-sectional perspective view of the extension pipe showing a coupling structure of the outer pipe main body, the partition member, and the tunnel cover with respect to the extension pipe according to the present embodiment.

  FIG. 5 is a perspective view showing a bracket pair of the extension pipe according to the present embodiment.

  FIG. 6 is a perspective view showing a main part of the tunnel cover of the extension pipe according to the present embodiment.

  FIG. 7 is a perspective view showing a coupled state of the bracket pair of the extension pipe and the partition member according to the present embodiment.

  As shown in FIG. 4 to FIG. 7, the extension tube 25 according to the present embodiment is provided on the outer surface of the outer tube main body 41 and the outer tube main body 41 made of carbon fiber-containing resin in the longitudinal direction of the outer tube main body 41. A pair of brackets 46 and 47 arranged substantially parallel to each other, a partition member 62 made of an insulator that is sandwiched between the bracket pairs 46 and 47 and extends in the longitudinal direction of the outer tube main body 41, and the bracket pairs 46 and 47 and the partition member A first tunnel cover 63 made of an insulator that divides a first insulating chamber 93 extending from one end of the outer tube main body 41 to the other end in cooperation with the partition member 62; Power line 75 extending from one end of the outer tube main body 41 to the other end through 93.

  The extension pipe 25 has a first fixing portion 101 for fixing the partition member 62 to the bracket pair 46, 47 by combining the unevenness and a second fixing member for fixing the first tunnel cover 63 to the bracket pair 46, 47 by combining the unevenness. A fixing unit 102.

  The outer tube main body 41 includes cover holding wall pairs 103 and 105 that are provided on the outer surface thereof and sandwich the bracket pairs 46 and 47 and extend substantially in parallel.

  The bracket pairs 46 and 47 protrude larger from the outer surface of the outer tube main body 41 than the cover holding wall pairs 103 and 105 and are taller than the cover holding wall pairs 103 and 105. The bracket pairs 46 and 47 do not have to be positioned in the same cross-sectional shape of the extension tube 25, and each of the bracket 46 and the bracket 47 may be displaced in the longitudinal direction of the extension tube 25.

  The partition member 62 extends between the pair of brackets 46 and 47, extends along the outer surface of the outer tube main body 41, and covers the outer tube main body 41 with respect to the first insulating chamber 93. Further, both side portions of the partition member 62 are provided with raised portions 106 that are further away from the outer tube main body 41 than the bracket pairs 46 and 47. The raised portion 106 sandwiches the pair of brackets 46 and 47 in a narrow gap between the first tunnel cover 63 and the raised portion 106.

  The first tunnel cover 63 has a U-shaped cross section that opens toward the outer tube main body 41, and has an opening end, that is, an edge located in the vicinity of the outer tube main body 41, attached to the pair of cover holding walls 103 and 105. Match.

  A tunnel inner tube 73 is disposed in the first insulating chamber 93 where the partition member 62 and the first tunnel cover 63 partition, and a power line 75 is disposed in the second insulating chamber 98 in the tunnel inner tube 73.

  The unevenness of the first fixing portion 101 is a concave portion 107 provided on the bracket pair 46, 47 side and a convex portion 108 provided on the partition member 62 side. The convex part 108 enters the concave part 107 as it moves away from the outer tube main body 41 in the cross section, and the catch increases.

  The unevenness of the second fixing portion 102 is a concave portion 109 provided on the bracket pair 46, 47 side and a convex portion 111 provided on the first tunnel cover 63 side. The convex portion 111 also enters the concave portion 109 as the distance from the outer tube main body 41 in the cross section increases, and the catch increases.

  The concave portion 107 of the first fixing portion 101 and the concave portion 109 of the second fixing portion 102 are integral holes 112 provided in the bracket pairs 46 and 47.

  The extension pipe 25 configured as described above sandwiches the brackets 46 and 47 between the first fixing portion 101 and the second fixing portion 102, and the partition member 62 and the first tunnel cover 63 mutually attach the brackets 46 and 47. Therefore, the external force applied to the first tunnel cover 63 from the outside of the extension pipe 25 and the external force acting on the outer pipe main body 41 are uneven between the partition member 62 and the first tunnel cover 63. Even if force acts, it becomes difficult to drop off from the outer tube main body 41.

  FIG. 8 is a cross-sectional view of the extension pipe showing a coupling structure of the outer pipe main body, the partition member, and the tunnel cover with respect to the extension pipe according to the present embodiment.

  As shown in FIG. 8, the extension pipe 25 according to the present embodiment is provided at the edge of the first tunnel cover 63 in the vicinity of the outer pipe main body 41 and in the region where the bracket pairs 46 and 47 are not present, An inlay piece 113 that abuts against the inner surface facing the partition members 62 of 103 and 105 is provided.

  The inlay piece 113 cooperates with the first fixing portion 101 and the second fixing portion 102 to fix the first tunnel cover 63 to the outer tube main body 41 over substantially the entire length. On the other hand, if the first tunnel cover 63 is opened for maintenance or repair by arranging the inlay piece 113 in the non-existing area while avoiding the existing area of the bracket pairs 46, 47, the bracket pair 46, 47 The first tunnel cover 63 can be easily opened as compared to the case where the spigot pieces 113 are arranged side by side in the existing region.

  FIG. 9 is an exploded perspective view showing an electric circuit telescopic tube of the extension tube according to the present embodiment. FIG. 9 is a perspective view showing the electric circuit telescopic tube from the inner tube main body 42 side.

  As shown in FIG. 9, the tunnel inner pipe 73 of the extension pipe 25 according to the present embodiment accommodates a pair of power lines 75 in the second tunnel cover 95.

  A bifurcated branch portion 115 is provided at the end of the cover back cover 96 so as to be bifurcated and individually fix the pair of sockets 77 to the second tunnel cover 95. The bifurcated branch 115 has a plug insertion hole 99 that communicates with the socket 77. The cover back cover 96 is ultrasonically welded to the second tunnel cover 95. The crotch portion of the bifurcated branch portion 115 secures a gap for placing the hook 49.

  The hook cover portion 97 has a hook opening 116 communicating with a crotch portion of the bifurcated branch portion 115, that is, a gap between the pair of power lines 75 or the pair of sockets 77.

  FIG. 10 is a longitudinal sectional view showing the extension pipe according to the present embodiment in a shortened manner.

  As shown in FIG. 10, the extension pipe 25 includes an inner pipe main body 42 made of a carbon fiber-containing resin, an insulating cover back cover 96 (partition member) extending in the longitudinal direction of the inner pipe main body 42, and a cover back cover. 96, a second tunnel cover 95 made of an insulator that defines a second insulating chamber 98 extending from one end of the inner tube main body 42 to the other end, and the inner tube main body through the second insulating chamber 98. A power line 75 extending from one end of 42 to the other end, and a hook that fixes and releases the suction port body 26 (adjacent structure) connected to the end of the inner pipe main body 42 by swinging. 49 and a shaft portion 117 that is sandwiched between the inner pipe main body 42 and the second tunnel cover 95 and supports the hook 49 so as to be swingable.

  The hook 49 is a molded product of synthetic resin, for example, nylon. The hook 49 causes the claw 118 to protrude into the inner tube main body 42 by the coil spring 51. The hook 49 is sandwiched between the pair of power lines 75 or the pair of sockets 77 and is disposed at the crotch portion of the bifurcated branch portion 115 of the cover back cover 96. The hook 49 is provided with a pressing portion 119 that protrudes from the second tunnel cover 95 through the hook opening 116 and swings the hook 49 to the fixed release position when pushed down toward the second tunnel cover 95.

  The shaft portion 117 is integrally formed with the hook 49. The shaft portion 117 is disposed in a bearing portion 123 including a bearing half body 121 on the inner tube main body 42 side and a bearing half body 122 on the second tunnel cover 95 side, and supports the hook 49 so as to be swingable. The hook 49 swings in a seesaw shape around the shaft portion 117 to fix or release the inner pipe main body 42 and the suction port body 26.

  Next, another example of the extension pipe 25 according to the embodiment will be described. In addition, the same code | symbol is attached | subjected to the same structure as the extension pipe 25 in the extension pipes 25A, 25B, and 25C demonstrated in each example, and the overlapping description is abbreviate | omitted.

  FIG. 11 is a side view of the first fixing portion and the second fixing portion showing another example of the coupling structure of the outer tube main body, the partition member, and the tunnel cover for the extension tube according to the present embodiment.

  As shown in FIG. 11, the extension tube 25 </ b> A according to the present embodiment includes a first fixed portion 101 </ b> A and a second fixed portion 102 </ b> A that are arranged in a non-opposing manner and are displaced in the longitudinal direction of the outer tube main body 41.

  In the extension tube 25, the convex portion 108 of the first fixing portion 101 and the convex portion 111 of the second fixing portion 102 face each other in the hole 112 and face each other. On the other hand, in the extension tube 25A, the convex portion 108 of the first fixed portion 101A and the convex portion 111 of the second fixed portion 102A have different positional relationships when viewed in the longitudinal direction of the outer tube main body 41. For this reason, in the extension pipe 25A, the convex portion 108 of the first fixing portion 101A and the convex portion 111 of the second fixing portion 102A are caught by the hole 112, so that the thickness of the hole 112 does not compete. That is, in the extension pipe 25A, the first fixing part 101A and the second fixing part 102A can fix the partition member 62 and the first tunnel cover 63 with a margin.

  FIG. 12 is a side view of the first fixing portion and the second fixing portion showing another example of the coupling structure of the outer tube main body, the partition member, and the tunnel cover for the extension tube according to the present embodiment.

  As shown in FIG. 12, the extension pipe 25 </ b> B according to the present embodiment includes a first fixing part 101 </ b> B and a second fixing part 102 </ b> B that are arranged in a non-opposing manner and are displaced in the radial direction of the outer pipe main body 41. In other words, the first fixed portion 101B and the second fixed portion 102B are displaced in the protruding height direction of the bracket pairs 46 and 47.

  In the extension tube 25, the convex portion 108 of the first fixing portion 101 and the convex portion 111 of the second fixing portion 102 face each other in the hole 112 and face each other. On the other hand, in the extension tube 25B, the convex portion 108 of the first fixed portion 101B and the convex portion 111 of the second fixed portion 102B have different positional relationships when viewed in the radial direction of the outer tube main body 41. For this reason, in the extension pipe 25B, since the convex part 108 of the first fixing part 101B and the convex part 111 of the second fixing part 102B are caught by the hole 112, the thickness of the hole 112 does not compete. That is, in the extension pipe 25B, the first fixing portion 101B and the second fixing portion 102B can fix the partition member 62 and the first tunnel cover 63 with a margin.

  In particular, in the extension pipe 25B, the second fixing portion 102B for fixing the first tunnel cover 63 to the bracket pair 46, 47 is more external than the first fixing portion 101B for fixing the partition member 62 to the bracket pair 46, 47. It is separated from the main body 41. In other words, in the extension tube 25B, the second fixing portion 102B is closer to the protruding tip portions of the bracket pairs 46 and 47 than the first fixing portion 101B. As a result, the extension pipe 25B holds the protruding tip portions of the bracket pairs 46 and 47 with the inner surface of the first tunnel cover 63, and suppresses deformation of the bracket pairs 46 and 47, in particular, deformation that falls down away from the partition member 62. The partition member 62 and the first tunnel cover 63 can be firmly fixed.

  FIG. 13 is a partial cross-sectional view of the extension pipe showing another example of the coupling structure of the outer pipe main body, the partition member, and the tunnel cover for the extension pipe according to the present embodiment.

  As shown in FIG. 13, the extension pipe 25C according to this embodiment includes T-shaped bracket pairs 46C and 47C, unlike the bracket pairs 46 and 47 of the extension pipe 25. The bracket pairs 46C and 47C have a concave portion 107C of the first fixing portion 101C and a concave portion 109C of the second fixing portion 102C at the T-shaped refracting portion, and the convex portion 108 of the first fixing portion 101 and the second fixing portion 102. The partition 111 and the first tunnel cover 63 are fixed by hooking the projection 111.

  The extension tube 25 according to the present embodiment configured as described above supports the hook 49 via the shaft portion 117 sandwiched between the inner tube main body 42 and the second tunnel cover 95, avoiding the cover back cover 96. Therefore, the load applied to the hook 49 is received by the inner pipe main body 42 or the second tunnel cover 95. By the way, the cover back cover 96 is an important member for insulation between the power line 75 and the inner tube main body 42 which is an electric conductor, and therefore must be prevented from being damaged. According to the extension pipe 25 according to the present embodiment, no load is applied from the hook 49 to the cover back cover 96, and the cover back cover 96 is prevented from being damaged, and hence the electric leakage from the power line 75 to the inner pipe main body 42 is prevented. Can do.

  In addition, the extension pipe 25 according to the present embodiment can support the push-down force applied to the push-down portion 119 among the loads acting on the hook 49 by the inner pipe main body 42. The inner tube main body 42 is an electric conductor, particularly a carbon fiber-containing resin, and has higher strength and higher wear resistance than polypropylene (PP) and ABS resin, which are conventional materials for the extension tube 25. For this reason, the extension pipe 25 is excellent in durability against the pressing force that repeatedly acts on the hook 49.

  Furthermore, the extension pipe 25 according to the present embodiment has the second insulating portion and the second insulating portion of the hook 49, even if moisture enters the periphery of the pressing portion 119 of the hook 49, that is, the hook opening 116 of the second tunnel cover 95. Since the chamber 98 is partitioned by the cover back cover 96 and the second tunnel cover 95, the moisture can be prevented from reaching the power line 75 in the second insulating chamber 98. By doing so, the extension pipe 25 prevents moisture from being transmitted from the power line 75 to the inner pipe main body 42.

  Therefore, according to the extension tube 25 and the vacuum cleaner 1 according to the present invention, the insulation structure between the power line 75 and the outer tube main body 41 is not affected, and the safety against leakage is high.

  The vacuum cleaner 1 according to the present embodiment is not limited to a canister type but may be a stick type.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner 2 Vacuum cleaner main body 3 Pipe part 5 Main body case 6 Wheel 7 Electric blower 8 Dust separation dust collection part 9 Main body control part 11 Power supply cord 12 Main body connection port 14 Plug 19 Connection pipe 21 Dust collection hose 22 Hand operation Pipe 23 Grip part 24 Operation part 24a Start switch 24b Stop switch 25, 25A, 25B, 25C Extension pipe 26 Suction port body 28 Suction port 29 Rotating cleaning body 31 Electric motor 41 Outer pipe body 42 Inner pipe body 43 Joint part 45 Tunnel part 46 , 46C, 47, 47C Bracket pair 48 Joint portion 49 Hook 50 Protective cover 51 Coil spring 52 First guide ring 53 Second guide ring 55 Seal ring 57 Stopper 58 Hook portion 59 Opening 61 Stopper fixing portion 62 Partition member 63 First tunnel cover 65 Tunnel member 66 End cover 67 Screw 68 Boss 69 Fixed piece 71 Fixed hole 72 Fixed hole 73 Tunnel inner pipe 75 Power line 76 Sheath 77 Socket 78 Plug 79 Total length adjusting mechanism 81 Total length adjusting switch 82 Total length adjusting recess 83 Large inner diameter portion 85 Guide groove 86 Partitioning portion 87 Pressing portion 88 Arm 89 Pin 91 Coy spring 92 Shaft portion 93 First insulating chamber 95 Second tunnel cover 96 Cover back cover 97 Hook cover portion 98 Second insulating chamber 99 Plug insertion holes 101, 101A, 101B, 101C First fixing portions 102, 102A, 102B, 102C Second Fixing part 103, 105 Cover holding wall pair 106 Raised part 107 Concave part 108 Convex part 109 Concave part 111 Convex part 112 Hole 113 Inlay piece 115 Forked part 116 Hook opening 117 Shaft part 118 Claw 119 Press part 121 Bearing half body 122 Bearing half part Body 123 Bearing part

Claims (5)

A tube body made of carbon fiber-containing resin;
An insulating partition member extending in the longitudinal direction of the tube body;
A tunnel cover made of an insulator that partitions an insulating chamber extending from one end of the tube main body to the other end in cooperation with the partition member;
A power line extending from one end of the tube body to the other end through the insulating chamber;
Hooks for fixing and releasing the adjacent structure connected to the end of the tube body by swinging;
An extension pipe comprising: a shaft portion provided on the hook and sandwiched between the pipe body and the tunnel cover and supporting the hook so as to be swingable. 2. The extension pipe according to claim 1, wherein the hook includes a push-down portion that protrudes from the tunnel cover and swings the hook to a fixed release position when pushed down toward the tunnel cover. The extension pipe according to claim 1 or 2, wherein the power line is a pair of electric wires sandwiching the hook. An inner tube main body that can be pulled out from or stored in the tube of the tube main body;
The extension pipe according to any one of claims 1 to 3, further comprising: an electric path telescopic inner pipe that can be drawn out of the insulating chamber or stored in the insulating chamber and guides the power line to a protruding end side of the inner pipe main body. The vacuum cleaner body,
An electric blower that is housed in the vacuum cleaner body and generates negative pressure;
An electric vacuum cleaner comprising: the extension pipe according to any one of claims 1 to 4, which is fluidly connected to the electric blower.

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