JP6400380B2 - Extension tube and vacuum cleaner - Google Patents

Description

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

  An extension pipe provided with a lighting device at an end on the suction port side and a vacuum cleaner are known.

JP 2014-69023 A

  Conventional extension tubes and vacuum cleaners include a power source circuit for a light source provided in the cleaner body, and a power line that reaches the light source from the power source circuit in the cleaner body through the dust collecting hose and extension tube. . The power line is laid separately from the power line for the suction port that supplies power to the suction port side.

  By the way, the power line laid on the dust collecting hose and the extension pipe can be reduced by arranging or integrating the power source circuit for the light source close to the light source.

  However, if the power source circuit for the light source is placed close to the light source or integrated to increase the size of the tube end of the extension tube, it becomes difficult to clean the narrow space, and the convenience of the vacuum cleaner Will be reduced.

  When the power source circuit for the light source is arranged close to the light source or integrated, it is appropriate to arrange the light source on the upper surface side of the extension tube to illuminate the longitudinal direction of the extension tube. On the other hand, when the power supply circuit is integrated with the light source or arranged on the upper surface side of the extension tube as the vicinity of the light source, for example, when the extension tube is inserted under furniture such as a bed, the upper surface of the extension tube The side tends to hit the underside of the bed, which can damage the power circuit.

  Accordingly, the present invention avoids an increase in the number of power lines laid on the extension pipe, increases the convenience by arranging the light source and the power source circuit for the light source while suppressing the enlargement of the tube tip, and is an extension that is excellent in protecting the power circuit. An object is to provide a tube and a vacuum cleaner.

In order to solve the above problems, an extension pipe according to an embodiment of the present invention includes a pipe main body having an air passage, an inner cover provided on the upper surface side of the joint portion of the pipe main body, and a lower surface of the joint portion of the pipe main body. A fastener that is directly or indirectly supported by the tube body on the side, and is electrically connected to an electrical circuit of an adjacent structure that is disposed outside the tube body and is inserted into the tube body to supply power The power line, the light source provided on the outer surface of the inner cover, the clamp and the tube main body, and the electric power line connected to the power line to adjust the input power flowing through the power line And a power supply circuit that supplies output power to the light source, and an illumination power line that guides power from the power line to the power supply circuit along the outer surface of the side surface of the tube body .

  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 block diagram 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 of the extension pipe concerning the embodiment of the present invention. The longitudinal section of the extension pipe concerning the embodiment of the present invention. The perspective view which shows the inner side of the hook cover part of the extension pipe | tube which concerns on this embodiment. The disassembled perspective view which shows the joint part of an inner pipe main body about the extension pipe which concerns on this embodiment.

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

  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 electric vacuum cleaner 1 includes a vacuum cleaner body 2 that can travel on the surface to be cleaned, and a pipe portion 3 that is detachable from the cleaner body 2. The vacuum cleaner body 2 and the pipe portion 3 are fluidly connected.

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

  The vacuum cleaner main body 2 drives the electric blower 8 with electric power supplied via the power cord 11, and causes the negative pressure generated by the drive of the electric blower 8 to act on the pipe portion 3. The vacuum cleaner 1 sucks air containing dust (hereinafter referred to as “dust-containing air”) from the surface to be cleaned through the pipe portion 3, separates the dust from the dust-containing air, and collects the separated dust. And accumulates and exhausts the separated air.

  A main body connection port 12 is provided in the front portion of the main body case 5. The main body connection port 12 is a fluid inlet of the cleaner body 2, and fluidly connects the pipe portion 3 and the dust separation and dust collection portion 7.

  The wheel 6 is a large-diameter traveling wheel and supports the cleaner body 2.

  The dust separating and collecting unit 7 separates dust from the dust-containing air flowing into the cleaner body 2, collects and accumulates it, and sends clean air from which dust has been removed to the electric blower 8. The dust separation and collection unit 7 may be a centrifugal separation method or a filtration separation method.

  The electric blower 8 sucks air from the dust separating and collecting part 7 and generates negative pressure (suction negative pressure).

  The main body control unit 9 includes a microprocessor (not shown) and a storage device (not shown) for storing various arithmetic programs executed by the microprocessor, parameters, and the like. The storage device stores a plurality of preset operation modes. The plurality of operation modes set in advance are related to the magnitude of the operation output of the electric blower 8 and correspond to user operations accepted by the pipe section 3. Different input values (input values of the electric blower 8) are set in the respective operation modes. The main body control unit 9 selectively selects an arbitrary operation mode corresponding to the operation content from a plurality of operation modes set in advance according to the operation of the user accepted by the tube unit 3 from the storage unit. The electric blower 8 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). At the free end of the power cord 11, a power plug 14 detachably attached to the wiring plug connector is provided.

  The pipe part 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 is fluidly connected to the connection pipe 19 as a joint that is detachably connected to the cleaner body 2, the dust collection hose 21 that is fluidly connected to the connection pipe 19, and the dust collection hose 21. A hand operating tube 22, a gripping part 23 projecting from the hand operating tube 22, an operating part 24 provided on the gripping part 23, an extension tube 25 detachably connected to the hand operating tube 22, and an extension tube 25 And a suction port body 26 that is detachably connected.

  The connection pipe 19 is a joint that is detachably connected to the main body connection port 12, and is fluidly connected to the dust separating and collecting part 7 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 collection hose 21 (here, the rear end) is fluidly connected to the connection pipe 19. The dust collecting hose 21 is fluidly connected to the dust separating and collecting part 7 through the connecting pipe 19.

  The hand operation tube 22 relays the dust collection hose 21 and the extension tube 25. One end portion (here, the rear end portion) of the hand operation tube 22 is fluidly connected to the other end portion (here, the front end portion) of the dust collecting hose 21. The hand operating tube 22 is fluidly connected to the dust separating and collecting part 7 through the dust collecting hose 21 and the connecting tube 19.

  The grip portion 23 is a portion that the user grips with his / her hand to operate the vacuum cleaner 1. The grip portion 23 protrudes from the hand operation tube 22 in an appropriate shape that can be easily gripped by the user.

  The operation unit 24 includes a switch associated with each operation mode. Specifically, the operation unit 24 includes a stop switch 24 a associated with the operation stop operation of the electric blower 8, a start switch 24 b associated with the operation start operation of the electric blower 8, and power supply to the suction port body 26. And a brush switch 24c associated with each other. The stop switch 24 a and the start switch 24 b are electrically connected to the main body control unit 9. The user of the vacuum cleaner 1 can alternatively select the operation mode of the electric blower 8 by operating the operation unit 24. The start switch 24 b also functions as an operation mode selection switch during operation of the electric blower 8. In this case, every time an operation signal is received from the activation switch 24b, the main body control unit 9 switches the operation mode in the order of strong → medium → weak → strong → medium → weak →. Note that the operation unit 24 may individually include a strong operation switch (not shown), a medium operation switch (not shown), and a weak operation switch (not shown) instead of the start switch 24b.

  An extension tube 25 having a telescopic structure in which a plurality of cylindrical bodies are superposed is an elongated, substantially cylindrical tube that can be expanded and contracted. One end portion (here, the rear end portion) of the extension tube 25 is provided with a joint structure that is detachable from the other end portion (here, the front end portion) of the hand operation tube 22. The extension pipe 25 is fluidly connected to the dust separating and collecting part 7 through the hand operating pipe 22, the dust collecting hose 21 and the connecting pipe 19. A lighting device 27 is provided at the other end of the extension tube 25 (here, the front end). The illumination device 27 illuminates the surface to be cleaned in front of the suction port body 26, that is, when the user of the vacuum cleaner 1 reciprocates the suction port body 26 in the front-rear direction, and dust on the surface to be cleaned Increase visibility.

  The suction port body 26 can run or slide 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 is provided with a joint structure that is detachable from the other end portion (here, the front end portion) of the extension pipe 25. The suction port body 26 is fluidly connected to the dust separating and collecting part 7 through the extension pipe 25, the hand operating pipe 22, the dust collecting hose 21 and the connecting pipe 19. That is, the suction port body 26, the extension tube 25, the hand operation tube 22, the dust collection hose 21, the connection tube 19, and the dust separation and dust collection unit 7 are suction air paths from the electric blower 8 to the suction port 28. The electric motor 31 alternately starts and stops operation every time it receives an operation signal from the brush switch 24c.

  The electric vacuum cleaner 1 starts the electric blower 8 when accepting a user operation on the start switch 24b. For example, when the vacuum cleaner 1 receives an operation on the start switch 24b while the electric blower 8 is stopped, the electric blower first operates the electric blower 8 in the strong operation mode, and receives an operation on the start switch 24b again. 8 is operated in the medium operation mode, and when the operation for the start switch 24b is accepted three times, the electric blower 8 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 8 is small in the order of the strong operation mode, the medium operation mode, and the weak operation mode. The started electric blower 8 exhausts air from the dust separation and collection unit 7 to make the inside negative.

  The negative pressure in the dust separating and collecting part 7 acts on the suction port 28 through the main body connection port 12, the connection tube 19, the dust collection hose 21, the hand control tube 22, the extension tube 25, and the suction port body 26 in order. To do. The vacuum cleaner 1 cleans the surface to be cleaned by sucking dust on the surface to be cleaned together with air by the negative pressure applied to the suction port 28. The dust separating and collecting unit 7 separates and accumulates dust from the dust-containing air sucked into the vacuum cleaner 1, and sends the air separated from the dust-containing air to the electric blower 8. The electric blower 8 exhausts the air sucked from the dust separating and collecting unit 7 to the outside of the cleaner body 2.

  FIG. 2 is a block diagram of the electric vacuum cleaner according to the embodiment of the present invention.

  As shown in FIG. 2, the vacuum cleaner 1 according to the present embodiment is electrically connected to the main body control circuit 35 and the main body control circuit 35 that are electrically connected to the commercial AC power source E via the power plug 14. A suction port body control circuit 36.

  The main body control circuit 35 includes an electric blower 8 connected in series to the commercial AC power supply E, a first switching element 37 that opens and closes an electric path connecting the commercial AC power supply E and the electric blower 8, and the commercial AC power supply E and the suction. A second switching element 38 that opens and closes an electric circuit connecting the mouth body control circuit 36, a main body power supply unit 39 that is connected to the commercial AC power supply E and supplies operating power to the main body control unit 9, a first switching element 37, And a main body control unit 9 that performs switching control of the second switching element 38.

  The first switching element 37 has a gate connected to the main body control unit 9, and changes the input of the electric blower 8 in accordance with the change of the gate current by the main body control unit 9. The second switching element 38 has a gate connected to the main body control unit 9, and changes the input of the suction port body control circuit 36 according to the change of the gate current by the main body control unit 9. The first switching element 37 and the second switching element 38 are elements such as a bidirectional thyristor and a reverse blocking three-terminal thyristor.

  The main body power supply unit 39 is a control power supply for the main body control unit 9.

  The operation unit 24 includes a voltage variable circuit (not shown) that changes the divided voltage value of the output voltage of the main body power supply unit 39 in response to the operation of the stop switch 24a and the start switch 24b. The divided value of the output voltage of the main body power supply unit 39 changed by the operation unit 24 is an operation signal received by the main body control unit 9.

  The main body control unit 9 includes a microcomputer, and includes a central processing unit (not shown), a memory (not shown), an I / O unit (not shown), and a timer (not shown). The memory stores in advance data such as a control program executed by the central processing unit and constants necessary for execution of the control program. This data includes a constant indicating an input value corresponding to each operation mode set in advance. The memory is a data storage area and a work area for temporarily storing operation data of the central processing unit.

  Further, the main body control unit 9 periodically reads the operation signal output from the operation unit 24 and the zero cross timing of the commercial AC power source E detected by a zero cross detector (not shown), and enters the selected operation mode. Therefore, switching control (phase control) of the first switching element 37 and the second switching element 38 is performed to control the input of the electric blower 8 and the suction port body control circuit 36.

  The main body control unit 9 controls the input of the electric blower 8 according to, for example, three operation modes including a strong operation mode, a medium operation mode, and a weak operation mode. The main body control unit 9 performs switching control of the first switching element 37 by sequentially switching the operation mode every time an operation signal is received from the start switch 24b.

  The main body control unit 9 performs switching control of the second switching element 38 to connect or cut off the electric path between the commercial AC power supply E and the suction port body control circuit 36.

  The main body control unit 9 measures the current values of the electric circuit connecting the commercial AC power supply E and the electric blower 8 and the electric circuit connecting the commercial AC power supply E and the electric motor 31 to each load of the electric blower 8 and the electric motor 31. Monitor.

  The suction port body control circuit 36 includes a power source detection unit 42 that detects the voltage of power supplied from the main body control circuit 35 side, and a suction port body power source unit that converts AC power supplied from the main body control circuit 35 into DC power. 43, a switching circuit 45 that is connected to the suction port power supply unit 43 to change the input of the electric motor 31, and a suction port control unit 46 that performs switching control of the switching circuit 45.

  The power source detection unit 42 detects the voltage waveform of the power supplied from the main body control circuit 35 side and outputs it to the suction port body control unit 46.

  The switching circuit 45 is a bridge circuit having a plurality of switching elements (not shown). The switching circuit 45 changes the input and rotation direction of the electric motor 31 according to the control of the suction port control unit 46.

  Similarly to the main body control unit 9, the suction port body control unit 46 includes a microcomputer, and includes a central processing unit (not shown), a memory (not shown), an I / O unit (not shown), and a timer (not shown). . The memory stores in advance data such as a control program executed by the central processing unit and constants necessary for execution of the control program. The memory is a data storage area and a work area for temporarily storing operation data of the central processing unit.

  When the supply of power from the main body control circuit 35 side to the suction port body control circuit 36 is started by switching control of the second switching element 38, the suction port body control unit 46 obtains power from the suction port body power supply unit 43. It becomes possible to operate. Further, the suction port body control unit 46 reads information on the voltage waveform from the power source detection unit 42, performs switching control of the switching circuit 45 in synchronization with the voltage waveform, and controls the input and rotation direction of the electric motor 31.

  A lighting device 27 is electrically connected to a power line 47 that electrically connects the main body control circuit 35 and the suction port body control circuit 36. The illumination device 27 includes a light source 48 and a power supply circuit 49 that is electrically connected to the power line 47 and adjusts input power flowing through the power line 47 to supply output power to the light source 48.

  In addition, the suction inlet body control circuit 36 may be provided with the apparatus supplied with electric power from the electric power line 47 like an ion generator, for example.

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

  FIG. 3 is an exploded perspective view showing the extension pipe according to the embodiment of the present invention.

  4 and 5 are longitudinal sections of the extension pipe according to the embodiment of the present invention.

  As shown in FIGS. 3 to 5, the extension tube 25 according to the present embodiment can be pulled out from the tube of the outer tube body 51 and accommodated in the tube. An inner pipe main body 52.

  The outer tube main body 51 and the inner tube main body 52 are molded products of polypropylene.

  A joint portion 53 connected to the hand operation tube 22 is provided at one end of the outer tube main body 51. An inner tube main body 52 is inserted into the other end of the outer tube main body 51. A tunnel portion 55 is provided on the upper surface of the other end portion of the outer tube main body 51. The tunnel portion 55 is shorter than the outer tube main body 51 and is opened in the longitudinal direction of the outer tube main body 51.

  The outer tube main body 51 is provided with a plurality of pairs, for example, four pairs of brackets 56 and 57, which are provided on the outer surface thereof and are arranged substantially parallel to the longitudinal direction of the outer tube main body 51. The bracket pairs 56 and 57 are arranged from the tunnel portion 55 toward one end portion of the outer tube main body 51. The bracket pairs 56 and 57 face each other and face each other when viewed in the circumferential direction of the outer tube main body 51. Note that the bracket pairs 56 and 57 may be arranged in a staggered manner as viewed in the non-facing and non-facing positions, that is, in the longitudinal direction of the outer tube main body 51.

  The outer diameter of the inner tube main body 52 is slightly smaller than the inner diameter of the outer tube main body 51.

  One end of the inner tube main body 52 is inserted into the tube of the outer tube main body 51. The other end of the inner tube main body 52 remains outside the outer tube main body 51 even when the inner tube main body 52 is inserted into the outer tube main body 51 most deeply. The inner pipe main body 52 includes a joint portion 58 connected to the suction port body 26 at a portion remaining outside the outer pipe main body 51 in a state where the inner pipe main body 52 is inserted deepest into the outer pipe main body 51.

  The joint portion 58 includes a hook 59 that fixes or unfixes the suction port body 26, which is an adjacent structure, to the extension pipe 25, and a protective cover 61 that surrounds and protects the joint portion 58. The hook 59 is pressed by a coil spring 62 in a direction in which the suction port body 26 is fixed.

  The protective cover 61 is an annular cover that surrounds the joint portion 58, and is expanded toward the opening direction of the joint portion 58. The protective cover 61 includes a fastener 63 supported by the inner pipe main body 52 on the lower surface side of the joint portion 58 of the inner pipe main body 52. For example, when the fastener 63 is hooked on a fastener (not shown) provided on the cleaner body 2 side, the extension tube 25 supports the tube portion 3 in a posture oriented in the vertical direction, and the vacuum cleaner 1 is made compact. Use the storage mode. The fastener 63 may be directly provided on and supported by the lower surface side of the joint portion 58 of the inner pipe main body 52.

  The joint unit 58 is provided with the lighting device 27. The illumination device 27 includes an illumination cover 65 connected to the protective cover 61, a light source 48 provided in the illumination cover 65, and a power supply circuit 49 that supplies power to the light source 48.

  The light source 48 and the illumination cover 65 are disposed on the upper surface side of the joint portion 58 of the inner tube main body 52. The upper surface of the protective cover 61 is gradually inclined from the rear side of the joint portion 58 to the middle of the joint portion 58 while expanding in the radially outward direction of the inner pipe main body 52, and gradually near the pressing surface 68 of the hook 59. It has a hill portion 69 that is connected to the illumination cover 65 with an increased inclination. The hill portion 69 prevents a finger pushing the pressing surface 68 of the hook 59 from approaching the adjacent structure side. The hill portion 69 is connected to the lighting device 27 that illuminates the front of the inner pipe main body 52.

  Note that the front of the inner pipe main body 52 is slightly above the longitudinal direction of the extension pipe 25, and when cleaning is performed at the tip of the suction mouth body 26 or the extension pipe 25, the suction mouth body 26 or the extension pipe 25 is performed. Says where the tube tip advances.

  Next, a connecting portion between the outer tube main body 51 and the inner tube main body 52 will be described.

  The extension pipe 25 includes a first guide ring 71 inserted into the pipe of the outer pipe main body 51, a second guide ring 72 provided at the other end of the outer pipe main body 51, a first guide ring 71 and a second guide. A seal ring 73 sandwiched between the ring 72 and a stopper 75 provided on the inner pipe main body 52 is provided.

  The first guide ring 71 and the second guide ring 72 guide the movement of the inner tube main body 52 in the outer tube main body 51.

  The second guide ring 72 includes a flange portion 76 that fits the opening end of the tunnel portion 55. The collar portion 76 has an opening 77 connected to the hollow portion of the tunnel portion 55.

  The seal ring 73 prevents air outside the extension pipe 25 from flowing into the pipe from between the inner peripheral face of the outer pipe main body 51 and the outer peripheral face of the inner pipe main body 52.

  The stopper 75 is fixed to a stopper holding portion 78 provided at one end portion of the inner pipe main body 52. The stopper 75 is a detent that prevents the inner tube main body 52 from rotating relative to the outer tube main body 51, and is also a retaining that prevents the inner tube main body 52 from coming out of the outer tube main body 51.

  Next, the power line housing structure on the outer tube main body 51 side will be described.

  The extension pipe 25 includes a first tunnel cover 79 made of an insulator that is provided on the outer peripheral surface of the outer pipe main body 51 and extends in the longitudinal direction of the outer pipe main body 51 as a power line housing structure on the outer pipe main body 51 side.

  The first tunnel cover 79 extends from one end of the outer tube main body 51 to the other end. The first tunnel cover 79 has a tunnel member 81 that is long in the longitudinal axis direction of the outer tube main body 51 and an end portion that sandwiches and holds the end portion of the tunnel member 81 on the joint portion 53 side with the outer tube main body 51. And a cover 82.

  One end of the end cover 82 and the first tunnel cover 79 (the end close to the joint portion 53) is fastened to the boss 83 of the outer tube main body 51 by a screw (not shown). The other end of the first tunnel cover 79 (the end on the side close to the connecting portion between the outer tube main body 51 and the inner tube main body 52) is a pair of fixing pieces (not shown) penetrating the fixed hole 85 of the tunnel member 81. Omitted) is fitted into the fixing hole 86 of the outer tube main body 51.

  Next, the power line housing structure on the inner tube main body 52 side will be described.

  The extension pipe 25 includes a tunnel inner pipe 87 provided in the inner pipe main body 52 as a power line housing structure on the inner pipe main body 52 side. The tunnel inner pipe 87 extends from the vicinity of the joint portion 58 of the inner pipe main body 52 toward the outer pipe main body 51 and reaches the tunnel portion 55. The tunnel inner pipe 87 moves together with the inner pipe main body 52 and is pulled out from the first tunnel cover 79 or stored in the first tunnel cover 79.

  The power line housing structure on the outer tube main body 51 side and the power line housing structure on the inner tube main body 52 side cooperate to insulate the power line 47 over the entire length of the extension tube 25.

  Next, the power line 47 housed in the power line housing structure of the outer tube main body 51 and the inner tube main body 52 will be described.

  The extension pipe 25 is disposed outside the outer pipe main body 51 and the inner pipe main body 52 and includes a power line 47 that supplies power to the suction port body 26 from the cleaner main body 2 side, more specifically from the hand operating pipe 22.

  The power line 47 is configured in a coil spring shape over its entire length, and can follow the expansion and contraction of the extension tube 25. The power line 47 is accommodated in the sheath 88. The sheath 88 is a molded product of a synthetic resin, for example, polyethylene (PE), and is an insulator. The sheath 88 is shorter than the total length of the first tunnel cover 79 or the total length of the tunnel inner tube 87 and does not hinder the expansion / contraction operation of the extension tube 25. When the extension tube 25 is extended, the power line 47 becomes longer than the sheath 88 and protrudes from the sheath 88. Therefore, the power line housing structure of the extension tube 25 covers and hides the power line 47 protruding from the sheath 88. At each end of the power line 47, a socket 89 and a plug 91 are 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 92 that positions and temporarily fixes the full length of the expansion and contraction stepwise. The full length adjustment mechanism 92 includes a full length adjustment switch 93 provided in the outer pipe main body 51 and a plurality of full length positioning recesses 95 provided in the tunnel inner pipe 87 of the inner pipe main body 52.

  The full length positioning recesses 95 are arranged at substantially equal intervals in the longitudinal direction of the tunnel inner tube 87, and consequently the inner tube main body 52 and the extension tube 25, and temporarily fix the length of the extension tube 25 at each position. The total length can be adjusted and positioned.

  The outer tube main body 51 and the inner tube main body 52 have an air passage through which dust-containing air passes.

  The outer tube main body 51 has a predetermined length (depth, depth) from the end surface of the end portion on the side where the inner tube main body 52 is inserted (that is, the other end portion of the outer tube main body 51). A large inner diameter portion 96 having an inner diameter larger than that of the first portion is provided. The first guide ring 71, the second guide ring 72, and the seal ring 73 are sandwiched between the inner peripheral surface of the large inner diameter portion 96 and the outer peripheral surface of the inner pipe main body 52 and are accommodated in the large inner diameter portion 96. Yes.

  A guide groove 97 extending in the longitudinal direction is provided in the tube of the outer tube main body 51. A stopper 75 fixed to the inner pipe main body 52 is sandwiched between guide grooves 97 to restrict relative rotation between the outer pipe main body 51 and the inner pipe main body 52.

  Further, the outer tube main body 51 includes a partition portion 98 that partitions between the large inner diameter portion 96 and the guide groove 97. The partition portion 98 restricts the movement range of the stopper 75 to prevent the inner tube main body 52 from coming out of the outer tube main body 51.

  The full length adjustment switch 93 of the full length adjustment mechanism 92 includes a box-shaped pressing portion 99 that opens toward the tunnel portion 55, a pair of arms 101 that are provided integrally with the pressing portion 99 and that are spaced apart from each other, and a tunnel inner tube 87. A pin 102 that can be fitted into and removed from the full length positioning recess 95 and a coil spring 103 that presses the pressing portion 99 in a direction in which the pin 102 is fitted into the full length positioning recess 95 are provided.

  The pressing portion 99 includes a pair of shaft portions 105 that extend on the same line. The shaft portion 105 is disposed on a bearing portion (not shown) composed of a bearing half body on the tunnel portion 55 side and a bearing half body on the first tunnel cover 79 side, and supports the pressing portion 99 so as to be swingable. The pressing portion 99 swings in a seesaw shape around the shaft portion 105 and the pin 102 is fitted into any of the full length positioning recesses 95 to temporarily fix the entire length of the outer tube main body 51 and the inner tube main body 52 step by step. The pin 102 is pulled out from the full length positioning recess 95 to release the temporary fixing.

  The arm 101 fits the pin 102 into the full length positioning recess 95 or pulls it out of the full length positioning recess 95 as the pressing portion 99 swings.

  The user of the extension tube 25 oscillates the push-down portion 99 by pushing down the push-down portion 99 against the coil spring 103, pulls out the pin 102 from the full-length positioning recess 95 through the arm 101, and resists the coil spring 103. Thus, the temporary fixing between the outer tube main body 51 and the inner tube main body 52 is released, and the extension tube 25 can be expanded and contracted. On the other hand, when the user stops pressing down the pressing portion 99, the extension tube 25 swings the pressing portion 99 by the spring force of the coil spring 103, and the pin 102 is fitted into the full length positioning recess 95 via the arm 101. The outer pipe main body 51 and the inner pipe main body 52 are temporarily fixed.

  Next, the power line storage part of the outer tube main body 51 will be described.

  The first tunnel cover 79 defines a first insulating chamber 106 extending from one end of the outer tube main body 51 to the other end. The first insulating chamber 106 is isolated from the inside of the outer pipe main body 51, that is, from a pipe passage through which dust-containing air passes.

  Next, the power line storage part of the inner pipe main body 52 will be described.

  The tunnel inner pipe 87 extends in a cantilever shape toward the outer pipe main body 51 with the end fixed to the joint portion 58 of the inner pipe main body 52 as a base, and is inserted into the first insulating chamber 106 of the outer pipe main body 51. It is. The tunnel inner pipe 87 passes through the tunnel portion 55 of the outer pipe main body 51 through the opening 77 of the second guide ring 72 and reaches the first insulating chamber 106.

  The tunnel inner tube 87 includes a second tunnel cover 107 disposed on the radially outer side of the inner tube body 52, and a cover back cover 108 disposed on the radially inner side of the inner tube body 52 and facing the inner tube body 52. I have.

  The second tunnel cover 107 and the cover back cover 108 are molded products of a synthetic resin such as polypropylene (PP) or ABS resin, and are also insulators.

  The second tunnel cover 107 includes a hook cover portion 109 that supports the hook 59 in cooperation with the inner pipe main body 52. The hook cover portion 109 is a joint portion 58 of the inner pipe main body 52, and is provided on the upper surface side of the inner pipe main body 52. The hook cover portion 109 is a hollow box-shaped cover.

  The hook 59 is provided in the hook cover portion 109. The hook 59 is sandwiched between the inner tube main body 52 and the hook cover portion 109 and is held so as to be swingable. The hook 59 is caught by the joint portion of the suction port body 26 as an adjacent structure inserted into the inner tube main body 52 to prevent the joint portion from coming out of the inner tube main body 52.

  Further, the hook 59 swings around the hook shaft 111 as a center line extending in a tangential direction with respect to the circumference in the cross section of the inner pipe main body 52 (the cross section in the plane orthogonal to the longitudinal direction of the inner pipe main body 52). 26, and has a pressing surface 68 that is pushed in a direction approaching the suction port body 26 when releasing the hook with the joint portion of the suction port body 26.

  The longitudinal direction of the inner pipe main body 52 and the direction away from the joint portion 58 (two-dot chain line A in FIG. 5) is set to 0 degree of the reference angle, and is the radial direction of the inner pipe main body 52 and away from the inner pipe main body 52. When the direction (two-dot chain line B in FIG. 5) is 90 degrees, it is preferable that the normal line n of the pressing surface 68 is in the range R from 0 degrees to 45 degrees. The normal line n of the pressing surface 68 according to the present embodiment faces 45 degrees. That is, when the normal line n of the pressing surface 68 faces the range R, when the hook 59 swings around the hook shaft 111, the pressing surface 68 is adjacent to the center line of the inner pipe body 52 rather than approaching the center line. The distance approaching the suction port body 26 as a body is greater or equivalent. At this time, the user feels as if the pressing surface 68 is being pushed in a direction approaching the suction port body 26. In particular, the pressing surface 68 according to the present embodiment is connected to the wall portion 112 that extends straight from the hook shaft 111 toward the radial direction of the inner tube main body 52. That is, since the pressing surface 68 is close to the hook shaft 111 when viewed in the longitudinal direction of the inner pipe main body 52, the adjacent structure as the adjacent structural body is closer to the center line of the inner pipe main body 52 even in the process of pressing the hook 59. The distance approaching the suction port body 26 is larger, and the user who pushes the pressing surface 68 feels as if the pressing surface 68 is pressed more clearly in the direction approaching the suction port body 26.

  The cover back cover 108 defines a second insulating chamber 113 in which the power line 47 is disposed in cooperation with the second tunnel cover 107. The second insulating chamber 113 is isolated from the inside of the inner pipe main body 52, that is, from the pipe passage through which dust-containing air passes. The second insulating chamber 113 is connected to the first insulating chamber 106 on the outer tube main body 51 side.

  The socket 89 connected to the power line 47 is accommodated in the tunnel inner tube 87, particularly in the hook cover portion 109, at the other end of the tunnel inner tube 87 (the end closer to the joint portion 58). The socket 89 has a suction port through a plug (not shown) on the suction port body 26 side that is inserted into the second insulating chamber 113 as the suction port body 26, which is an adjacent structure, is connected to the joint portion 58. The electrode is electrically connected to an electric circuit (not shown) on the body 26 side.

  The hook cover portion 109 has a plug insertion hole 115 for allowing the plug on the hand control tube 22 side to reach the socket 89.

  Next, one end portion of the first tunnel cover 79 (the end portion on the side close to the joint portion 53 of the outer pipe main body 51) will be described.

  The plug 91 connected to the power line 47 protrudes from the first insulating chamber 106 along the longitudinal direction of the outer tube main body 51 at one end of the first tunnel cover 79 (the end close to the joint portion 53). Yes. When the proximal operation tube 22, which is an adjacent structure, is connected to the joint portion 53, the plug 91 is inserted into a socket (not shown) on the proximal operation tube 22 side to be electrically connected.

  Next, the lighting device 27 provided in the joint portion 58 of the inner pipe main body 52 will be described.

  The illuminating device 27 is provided in the light source 48 provided on the outer surface portion 116 of the hook cover portion 109 as an inner cover, the power supply circuit 49 disposed on the outer side of the inner tube main body 52, and the joint portion 58 of the inner tube main body 52. And a protective cover 61 as an outer cover that covers the hook cover portion 109 and the power supply circuit 49.

  The light source 48 includes a light emitting circuit board 117 supported by the hook cover portion 109, a light emitting element 118 that is provided on the light emitting circuit board 117 and illuminates the front of the inner tube main body 52, and a light source that covers the light emitting circuit board 117 and the light emitting element 118. A protective cover 119 and a transmissive cover 121 that transmits the light emitted from the light emitting element 118 and protects the light emitting circuit board 117 and the light emitting element 118 in combination with the light source protective cover 119 are provided.

  The light emitting circuit board 117 is held by a notch pair 123 provided on the pair of left and right standing walls 122 provided on the hook cover portion 109, protrudes from the hook cover portion 109 and extends in the radial direction of the inner tube main body 52. Yes. The light emitting circuit board 117 is pressed by the protective cover 61 and does not come out of the notch pair 123. The light emitting circuit board 117 is provided with an element cover 125 surrounding the periphery of the light emitting element 118. The element cover 125 extends around the light emitting element 118 in a trumpet shape in the direction of light emitted from the light emitting element 118.

  The light emitting element 118 is an LED (Light Emitting Diode) and has higher directivity of light to be irradiated than a light bulb, and can strongly illuminate the front of the extension tube 25.

  The light source protection cover 119 is connected to the protection cover 61 and smoothly connected, and surrounds the left, right, rear, and upper sides of the light emitting circuit board 117 and the light emitting element 118.

  The power supply circuit 49 is disposed on the lower surface side of the joint portion 58 of the inner pipe main body 52. The power supply circuit 49 is disposed so as to be sandwiched between the fastener 63 and the inner pipe main body 52.

  The power supply circuit 49 is held by the inner pipe main body 52. The inner tube main body 52 is provided with a power circuit holding frame 126 that holds the power circuit 49. The power circuit holding frame 126 is disposed on the lower surface side of the inner pipe main body 52 and protrudes downward in a box shape. The power circuit holding frame 126 is opened downward and is closed by the protective cover 61. The power supply circuit board 127 of the power supply circuit 49 is held in the power supply circuit holding frame 126 toward the tangential direction of the inner tube main body 52.

  The lighting device 27, the hook cover portion 109, and the hook 59 are disposed on the upper surface side of the inner tube main body 52, while the power supply circuit 49 and the fastener 63 are disposed on the lower surface side of the inner tube main body 52. .

  The extension tube 25 includes brush hairs 128 provided at the opening end of the inner tube body 52 and a base 129 that supports the brush hairs 128. The brush bristles 128 surround the opening of the joint portion 58 in an annular shape and extend in the longitudinal direction of the extension tube 25. The tips of the brush bristles 128 are arranged along a surface inclined from the upper surface side to the lower surface side of the extension tube 25 so that the user can easily come into contact with the surface to be cleaned in a state where the user slightly tilts the extension tube 25 backward. The base 129 also surrounds the opening of the joint portion 58 in an annular shape. The base 129 includes support arm portions 131 supported on the left and right side surfaces of the joint portion 58.

  FIG. 6 is a perspective view showing the inside of the hook cover portion of the extension pipe according to the present embodiment.

  As shown in FIG. 6, the hook cover portion 109 of the extension tube 25 according to the present embodiment holds a pair of left and right sockets 89. A power line 47 is connected to the socket 89. An illumination power line 133 that guides power from the power line 47 to the power supply circuit 49 is connected to the power line 47.

  FIG. 7 is an exploded perspective view showing the joint portion of the inner pipe main body of the extension pipe according to the present embodiment.

  As shown in FIG. 7, the illumination power line 133 of the extension tube 25 according to the present embodiment is drawn to the outside of the hook cover portion 109 at the rear end portion of the hook cover portion 109, and the outer surfaces on both the left and right sides of the inner tube main body 52. The input-side power line 134 that reaches the power circuit 49 in the power circuit holding frame 126 disposed on the lower surface side of the inner tube main body 52, the outer surfaces on the left and right sides of the inner tube main body 52 from the power circuit 49, and the hook cover An output-side power line 135 that reaches the light source 48 disposed on the upper surface side of the hook cover portion 109 along the outer surface of the portion 109. The illumination power line 133, that is, the input-side power line 134 and the output-side power line 135 are covered with the protective cover 61.

  The extension tube 25 and the vacuum cleaner 1 according to this embodiment configured as described above are sandwiched between the light source 48 disposed on the upper surface side of the joint portion 58, the fastener 63, and the inner tube main body 52. The total number of the power lines 47 laid on the extension pipe 25 can be reduced by distributing the electric circuits with different currents and voltages in different spaces.

  In addition, the extension tube 25 and the vacuum cleaner 1 according to the present embodiment are arranged such that the light source 48 disposed on the upper surface side of the joint portion 58, the power source disposed between the fastener 63 and the inner tube main body 52. The circuit 49 is provided and each electric circuit having a different current and voltage is dispersed in different spaces, so that an increase in the size of the end of the extension tube 25 can be avoided. For example, the light source 48 projects the light emitting circuit board 117 against the hook cover portion 109 in order to direct the light emitting element 118 toward the tube end of the extension tube 25, but if the power circuit 49 is integrated with the light emitting circuit board 117. The increase in area and size of the light emitting circuit board 117 is inevitable, and the size of the tube end of the extension tube 25 is increased. In the extension tube 25 according to the present embodiment, the light source 48 and the power supply circuit 49 are arranged in a distributed manner, so that the holding posture of the light source 48 and the power supply circuit 49 can be optimized and the enlargement of the tube tip of the extension tube 25 can be avoided.

  Further, the extension tube 25 and the vacuum cleaner 1 according to the present embodiment are configured such that the light source 48 disposed on the upper surface side of the joint portion 58, the power source disposed between the fastener 63 and the inner tube main body 52. Circuit 49, and by distributing the electric circuits having different currents and voltages in different spaces, for example, when the extension tube 25 is inserted under furniture such as a bed, the upper surface side of the extension tube 25 Even if it hits the lower surface of the bed, deformation on the lower surface side of the extension tube 25 is small, and the load on the power supply circuit 49 is suppressed and the reliability can be improved.

  Furthermore, since the extension pipe 25 and the electric vacuum cleaner 1 according to the present embodiment include the brush hair 128 provided at the opening end of the inner pipe main body 52, the inner pipe main body 52 is cleaned when cleaning is performed at the tube end of the extension pipe 25. Can be prevented from coming into direct contact with the cleaning place, and an impact force acting on the power supply circuit 49 can be avoided.

  In addition, the extension tube 25 and the vacuum cleaner 1 according to the present embodiment include the fastener 63 provided on the protective cover 61 and the power supply circuit 49 held on the inner tube main body 52, and thus the fastener 63. Even if a load is applied to the extension tube 25 and the protective cover 61 is deformed while the hook is hooked on the fastener, deformation of the inner tube main body 52 side holding the power circuit 49 is suppressed, and the soundness of the power circuit 49 is maintained. Be drunk.

  Therefore, according to the extension tube 25 and the vacuum cleaner 1 according to the present invention, the light source 48 and the power supply circuit 49 are arranged while avoiding an increase in the power line 47 laid on the extension tube 25 and suppressing an increase in the size of the tube tip. Therefore, the convenience is improved and the protection of the power supply circuit 49 is excellent.

  The vacuum cleaner 1 according to the present embodiment is not limited to a canister type, but may be an upright type, a stick type, or a handy 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 Dust separation dust collection part 8 Electric blower 9 Main body control part 11 Power cord 12 Main body connection port 14 Power plug 19 Connection pipe 21 Dust collection hose 22 Hand control pipe 23 Grasp part 24 Operation part 24a Stop switch 24b Start switch 24c Brush switch 25 Extension pipe 26 Suction port body 27 Illumination device 28 Suction port 29 Rotating cleaning body 31 Electric motor 35 Main body control circuit 36 Suction port body control circuit 37 First switching element 38 2nd switching element 39 Main body power supply part 42 Power supply detection part 43 Suction port body power supply part 45 Switching circuit 46 Suction port body control part 47 Power line 48 Light source 49 Power supply circuit 51 Outer pipe main body 52 Inner pipe main body 53 Joint part 55 Tunnel part 56 Bracket Pair 58 Joint part 59 Hook 61 Protective cover 62 Coil spring 63 Fastener 6 Illumination cover 68 Pressing surface 69 Hill part 71 First guide ring 72 Second guide ring 73 Seal ring 75 Stopper 76 Eaves part 77 Opening 78 Stopper holding part 79 First tunnel cover 81 Tunnel member 82 End cover 83 Boss 85 Fixed hole 86 Fixed hole 87 Tunnel inner pipe 88 Sheath 89 Socket 91 Plug 92 Total length adjusting mechanism 93 Total length adjusting switch 95 Recess 96 Large inner diameter portion 97 Guide groove 98 Partition portion 99 Pressing portion 101 Arm 102 Pin 103 Coil spring 105 Shaft portion 106 First insulating chamber 107 second tunnel cover 108 cover back cover 109 hook cover portion 111 hook shaft 112 wall portion 113 second insulating chamber 115 plug insertion hole 116 outer surface portion 117 light emitting circuit board 118 light emitting element 118 light emitting element 119 light source protection cover 121 transmission cover 12 2 Standing wall 123 Notch pair 125 Element cover 126 Power supply circuit holding frame 127 Power supply circuit board 128 Brush bristle 129 Base 131 Support arm part 133 Lighting power line 134 Input side power line 135 Output side power line

Claims (4)

A tube body having an air passage;
An inner cover provided on the upper surface side of the joint portion of the pipe body;
A fastener supported directly or indirectly on the pipe body on the lower surface side of the joint part of the pipe body;
A power line disposed outside the tube body and electrically connected to an electrical circuit of an adjacent structure inserted into the tube body to supply power;
A light source provided on the outer surface of the inner cover;
A power supply circuit that is disposed between the fastener and the tube main body, is electrically connected to the power line, adjusts input power flowing through the power line, and supplies output power to the light source;
An extension tube comprising: an illumination power line that guides power from the power line to the power supply circuit following the outer surface of the side surface of the tube body . The extension pipe according to claim 1, further comprising brush bristles provided at an open end of the pipe body. The fastener is provided on an outer cover that covers the joint portion of the pipe body,
The extension pipe according to claim 1, wherein the power supply circuit is held by the pipe 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 3, which is fluidly connected to the electric blower.

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