TW201817359A - Extension pipe of vacuum cleaner - Google Patents

Abstract

The purpose of the present invention is to provide an extension tube for electric vacuum cleaner, which has a reduced weight, is easier to grip, and is easier to operate. This extension tube for electric vacuum cleaner comprises a tube body and a conductive unit provided so as to pass through the interior of the tube body. The conductive unit has a conductive cable and a hollow plate which accommodates the conductive cable.

Description

Extension tube of electric vacuum cleaner

The invention relates to an extension tube of an electric vacuum cleaner.

As an extension tube of a conventional electric vacuum cleaner, Patent Document 1 discloses an extension tube including a tube body, a cover member attached to the outside of the tube body and extending in a longitudinal direction, and an extension tube provided between the tube body and the cover member. The insulating resin plate of the gap and the lead wire supported on the insulating resin plate, both ends of the lead wire are exposed to the outside to be able to be electrically connected to the terminal portions of the cleaner body and the suction port body.

Patent Document 1: Japanese Patent Application Publication No. 2012-249699

As described in Patent Document 1, an extension pipe provided with an insulating resin plate, a lead, and a cover member along the long side of the outer surface of the pipe body becomes thicker, the weight of the entire extension pipe increases, and the grip of the extension pipe is impaired. As a result, In this case, there is a defect that the operability is reduced when the moving direction of the suction port body is operated through the extension tube.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide an extension tube of an electric vacuum cleaner which is required to reduce weight and grip and improve operability.

Therefore, an extension tube of an electric vacuum cleaner according to the present invention includes a tube body and a conductive unit provided to be inserted through the tube body; the conductive unit includes a conductive cable and a hollow plate that houses the conductive cable.

The extension tube of the present invention can be applied to, for example, an electric vacuum cleaner, that is, a suction brush body that connects a rotary brush with a drive motor and a cleaner body, and supplies electric power from the cleaner body to the motor through the extension tube, while making the rotary brush of the suction mouth body Rotate while sweeping the ground. In addition, in this extension tube, the conductive unit is miniaturized in the tube body, and the tube body does not become thick. Therefore, weight reduction and grip are required. As a result, when the movement direction of the suction port body is operated through the extension tube, Improved operability.

(Embodiment 1) FIG. 1 is a left side view showing an electric vacuum cleaner according to Embodiment 1 of the present invention. The electric vacuum cleaner 1 according to the first embodiment includes a cleaner body 10, an extension tube 20, and a suction port body 40. The extension tube may be not limited to a structure capable of extending the tube itself. Compared with the handheld type in which the suction port body is directly mounted on the cleaner body for cleaning, when the suction port body is installed in the cleaner body through an extension pipe for cleaning, it can be used as an upright type in which the distance from the vacuum cleaner body to the suction port body becomes longer Clean up.

(About a vacuum cleaner body) FIG. 2: is a perspective view which shows the cleaner body of the vacuum cleaner which concerns on Embodiment 1, and FIG. 3 is a left side sectional drawing which shows the internal structure of the operation part provided in the handle of the cleaner body of FIG. FIG. 4 is a left side sectional view showing the internal structure of the cleaner body of FIG. 2, and FIG. 5 is a perspective view showing a disassembled state of the housing of the drive device of the cleaner body of FIG. 2. In addition, FIG. 6 is a view showing the electric vacuum cleaner according to the first embodiment. (A) is a state of being placed on the ground, and (B) is a state of being laid down on the ground. The cleaner body 10 includes a driving device 11, a dust cup unit 12 and a battery 13 which are detachably mounted on the driving device 11.

(Drive Device) As shown in FIGS. 2, 4 and 5, the drive device 11 includes a main body portion 11 a including an electric blower 11am, a battery mounting portion 11 b connected to the main body portion 11 a, and a main body portion 11 a and The handles 11c at both ends of the battery mounting portion 11b are connected to the joint portion of the main body portion 11a and the handle 11c, and the suction cylinder portion 11d protrudes to the side opposite to the handle 11c. Hereinafter, the side of the suction cylinder 11d of the driving device 11 is forward, the side of the handle 11c is rear, the side of the battery mounting portion 11b is lower, the side opposite to the battery mounting portion 11b is upward, and the left and right sides with the handle 11c facing forward are The left and right will be explained.

A body having a front portion 11a by a grid-like rib is provided at the front opening portion 11a _an opening portion 11a of the cylindrical portion of the housing ₁ constituting the outer profile. In addition, a fitting convex portion 11ax is provided on the upper surface of the main body portion 11a, and a hole portion is formed on the upper surface of the fitting convex portion 11ax to lead the leads in the main body portion 11a to the outside. Further, the main body portion 11a, along the front edge of the opening end portion of the flange 11a is _{provided. 1,} the lower portion of the inner flange of the inner flange width of the wide width wide portion 11a _11. Further, the wide inner portion 11a _{11 is} provided with a locking recessed portion 12c ₁₁ and an engaging claw 12b ₂₃ provided with the second locking mechanism portion 12b ₂ provided in the dust cup unit 12 to be described later so as to be able to be locked away. The locking convex portions 11a ₁₂ and the engaging concave portions 11a ₁₃ . In addition, the locking convex portions 11 a ₁₂ protrude downward, and the engaging concave portions 11 a ₁₃ open forward.

The battery mounting portion 11b has a recessed portion that opens downward and rearward and has a terminal portion that can be electrically connected to the terminal portion of the battery 13 inside. The battery 13 is inserted into the recessed portion from the rear, and the battery 13 is pulled out rearward. To remove from the recess. In addition, the left and right inner side surfaces of the recessed portion of the battery mounting portion 11b are provided with grooves extending in the front-rear direction, and the left and right side surfaces of the battery 13 are provided with convex portions. Insert while sliding in the left and right grooves. In addition, an exhaust port 11bx (see FIG. 4) for exhausting airflow passing through the electric blower 11am to the outside is formed on the right side surface of the case constituting the battery mounting portion 11b.

11c is formed to have a handle and a lower bent portion _{11c. 1} is substantially U-shaped upper curved portion 11c _2, the upper outer curved portion _{11c. 1} is provided with the operation portion 11e. As shown in FIGS. 3 and 4, the operation portion 11 e has a recessed portion 11 e ₁ provided in a resin case constituting an upper bent portion 11 c ₁ of the handle 11 c, and an elastic material (rubber, elastomer) attached to the outside of the recessed portion 11 e ₁ . etc.) composed of a pad portion 11e _2, and is provided inside the recess portion 11e ₁ (inner housing) switch unit 11e _3.

A convex rib 11e ₁₁ is provided at the central portion of the concave portion 11e ₁ at the operation portion 11e, and a pair of U-shaped slits are formed at the front and rear positions of the convex rib 11e _11. The inner area of the pair of U-shaped slits is The elastically deformable leaf spring portion 11e ₁₂ . In addition, convex portions are provided on the lower surfaces of the pair of plate spring portions 11e- ₁₂ . Further, later-described pad portion is formed with a longitudinal 11e ₂ of the pair of insertion engagement piece engaging hole portion 11e ₂₄ inserted in the front and rear positions of a pair of U-shaped slits in the concave portion 11e _1.

The pad portion 11e ₂ is provided with recessed portions 11e ₂₂ and 11e ₂₃ on the upper surface side of the pad portion 11e ₂₁ at the front and rear positions of the central portion 11e ₂₁ . In addition, on the lower surface side of the cushion portion 11e ₂ , convex portions corresponding to the pair of concave portions 11e ₂₂ , 11e ₂₃ are provided at the front and rear positions of the central portion 11e ₂₁ , and a pair of the aforementioned insertions are provided at the front and rear positions of the convex portions. The locking piece 11e ₂₄ . The central portion 11e _{21 is in} contact with the convex rib portion 11e ₁₁ , and the front and rear concave portions 11e ₂₂ , 11e _{23 are in} contact with the plate spring portion 11e ₁₂ .

The switch unit 11e ₃ includes a circuit board 11e ₃₁ supported and fixed by a rib structure provided in the upper bent portion 11c ₁ , and a pair of switches 11e ₃₂ and 11e ₃₃ provided in the front and rear of the circuit board 11e ₃₁ . In the operation portion 11e, 11e ₃₁ of the circuit board can operate in the following manner. For example, the power is turned on by pressing the front switch 11e ₃₂ or the rear switch 11e ₃₃ . After that, when the front switch 11e ₃₂ is pressed once, it becomes the strong mode, and when it is pressed twice, it is switched to the normal mode, and the above switching is repeated after three times. When the rear switch 11e ₃₃ is pressed while the power is on, the power is turned off.

When the operation portion 11e is operated, when the user presses the recessed portions 11e ₂₂ and 11e ₂₃ in front of or behind the pad portion 11e ₂ with his finger, the front or rear switches 11e ₃₂ and 11e ₃₃ are pressed through the leaf spring portion 11e ₁₂ . However, even if the user holds the pad portion 11e ₂ during cleaning, since the central portion 11e ₂₁ between the front and rear recesses 11e ₂₂ and 11e _{23 of the} pad portion 11e ₂ protrudes and is supported by the convex rib portion 11e ₁₁ , it is not The depressions 11e ₂₂ and 11e ₂₃ before and after the palm is pressed can suppress an erroneous operation by the user.

As shown in FIG. 5, the suction tube portion 11 d and the handle 11 e are configured by assembling first, second, and third members 11x, 11y, and 11z described later. 4 and 5, the first member is a member 11x extending in the forward direction, the housing having a locking hook member portion 11x and 11x _{2. 1} and the like at the front end portion of the recessed portion, and having a rear end portion embedded in the main body portion 11a The fitting hole portion 11x ₃ of the above-mentioned fitting convex portion 11ax.

The locking member 11x ₁ is swingably mounted on the first member 11x about a horizontal axis. In the assembled state, the front end portion of the locking member 11x ₁ has a button portion protruding downward from the hole formed in the first member 11x. Functions. Further, the rear end portion of the lock member 11x _1, having the extension tube 20 in a manner the card is inserted so as to be sucked out of engagement opening _{11d. 1} a frontal portion of the cylindrical portion 11d is engaged with the tube 20 extending portion of said first connecting pipe 22 engaging recessed portion 22a ₃₁ (see FIG. 9 (a) ~ FIG. 9 (C)) engaging claw function of 11x _11. In addition, in the assembled state, a coil spring that urges the front end portion of the locking member 11x downward (outside) between the first member 11x and the second member 11y is provided.

₂ the hook member 11x is latchable manner from the cleaner main body is mounted in the dirt cup 10 of the stopper member 12a ₂₁ locking the card 12 to be described later card recessed portion is formed protruding from the outside of the hole portion 11x of the first member downward.

Further, the first member 11x, the left side surface of the front-rear direction intermediate portion having a connection port connected to the outlet of the second member to be described later 11y _{11y. 11} of the 11x _4, the cleaner main body 10 and having a housing mounted on a rear end portion of the lower surface side The recessed portion of the first locking mechanism portion 12b ₁ and the recessed portion 11x ₁₂ into which the positioning projection portion 12c ₂₁ of the dust cup 12 described later is fitted.

The second member 11y includes a front cylindrical portion 11y ₁ that allows the front opening 11d ₁ and the outflow port 11y _{11 to} flow, an intermediate rib structure portion 11y ₂ connected to the front cylindrical portion 11y ₁ , and an intermediate rib structure portion. 11y ₂ is an inner handle constituting portion 11y _{3 which is} connected in series and constitutes an inner portion of the handle 11c. In the following the front end portion of the front side cylindrical portion 11y ₁ 11a is provided with one pair of the pair of mother lead terminal portion electrically connected to the body portion (not shown) drawn 11y _12, and the handle portion constituting the inner side 11y ₃ The bent middle portion houses the switch unit 11e _{3 of} the operation portion 11e.

The third member 11z is a member covering the intermediate rib structure portion 11y ₂ and the inner handle constituting portion 11y ₃ , and a cushion portion 11e _{2 of} the operation portion 11e is provided in the intermediate portion. In addition, a connecting portion 11b ₁ connected to the rear end portions of the second and third members 11y and 11z is provided at the rear portion of the battery mounting portion 11b. This connecting portion 11b ₁ includes a fixed protruding portion 11b ₁₁ and a pressing portion 11b ₁₂ provided on the fixed protruding portion 11b ₁₁ in a swingable manner. The pressing portion 11b ₁₂ operates when the battery 13 is removed.

Assembling the first to third member 11x, 11Y, 11z one case will be described, first, the fitting hole portion of the first member 11x _{11x. 3} fitted into the fitting convex portion 11a of the main body portion 11ax. Next, a pair of leads (not shown) drawn from the main body portion 11a is electrically connected to a pair of female terminal portions 11y ₁₂ of the second member 11y, and the pair of female terminal portions 11y _{12 is} mounted on the front end of the second member 11y. The second member 11y is superposed on the first member 11x. Accordingly, the outlet of the second member 11y _{11y. 11} is connected to the connecting port of the first member 11x _{11x. 4,} and the projecting portion 11b ₁ fixed to the rear end portion of the connecting portion 11y of the second member 11b ₁₁ abuts.

Next, the overlapped first and second members 11x, 11y are mounted on the ultrasonic fusion machine, and the left and right end edges 11xe of the front end portion of the first member 11x and the left and right end edges of the front cylindrical portion 11y ₁ of the second member 11y are mounted. 11ye ultrasonic welding. In addition, the symbol 11w in FIG. 2 represents a welding portion. As described above, since a part of the first member 11x and the second member 11y are ultrasonically welded, a connection structure of the self-tapping screw is unnecessary, so that the number of parts can be reduced and the weight can be reduced. The first and second members 11x and 11y are formed of, for example, ABS resin.

Next, after the pressing portion 11b _{12 of} the connecting portion 11b ₁ is swung to the second member 11y side, the third member 11z is overlapped with the second member 11y. Thereby, the pressing portion 11b ₁₂ is pressed by the rear end portion of the third member 11z. In addition, self-tapping screw N third coupling member and the second member 11z 11y, whereby the second and third members 11y, 11z of the rear end portion of the connecting portion 11b ₁ and connected to, a handle 11c is formed and a suction cylindrical portion 11d.

Here, as shown in FIG. 6 (A), the cleaner body 10 is provided with a support member 11f for supporting the cleaner body 10 at the front end portion of the battery mounting portion 11b so that the electric cleaner 1 can be placed on the floor F to interrupt cleaning. As a material of the support member 11f, for example, hard rubber is used. This support member 11f has a lower end portion formed in a curved shape protruding slightly forward when viewed from the side, and a lower end surface formed in an arc shape when viewed from the front.

Since a space is provided below the extension tube 20 of the electric vacuum cleaner 1 in the state of FIG. 6 (A), there is a possibility of damage when a force is applied from directly above the extension tube 20. Therefore, in the present invention, by forming the lower end surface of the support member 11f into a circular arc shape, when the force is applied from directly above the extension tube 20, the balance will fall and fall. As shown in FIG. The extension tube 20 is prevented from being damaged. In addition, when the cleaning is interrupted, the electric cleaner 1 may not be placed on the floor F, but the support member 11f may be hung on the top plate or the back of the table to place the electric cleaner 1.

FIG. 7 is an exploded view of the driving device of the electric vacuum cleaner according to the first embodiment. FIG. 8 (A) is a left side view of the driving device, and (B) is a left side view of the cleaner body. 9 (A) is a cross-sectional view taken along the arrow II of FIG. 8 (A), and (B) is a cross-sectional view taken along the arrow II of FIG. 8 (B). Hereinafter, components of the drive device 11 will be described with reference to FIGS. 2 to 9. First, the main body portion 11 a of the drive device 11 includes a pair of left and right electric fan covers 11ac _{1 and} 11ac _{2 that} house the electric fan 11am. The front opening 11a _{1 of the main} body portion 11a is integrally formed on the front end of the electric blower cover 11ac ₁ on the left side, and the fitting convex portion 11ax is integrally formed on the upper portion of each of the electric blower covers 11ac _1, 11ac ₂ . Half cut 11ax ₁ . Further, in the front opening portion 11a ₁ is attached to the engagement protrusion portion 11a _12. In addition, a pair of vibration-proof rubbers 11ac _{3 for} fixing the rear end of the electric blower 11am to a pair of left and right electric blower covers 11ac _1, 11ac ₂ and a front end portion of the electric blower 11am are provided in the main body portion 11a. between the inner surface of the outer peripheral portion of the front opening portion 11a ₁ and the pad 11ac _4.

Next, the battery mounting portion 11b of the drive device 11 includes a pair of left and right battery mounting portion housings 11bc ₁ and 11bc ₂ connected to a lower portion of the main body portion 11a with a screw (not shown). The above-mentioned exhaust port 11bx is formed on the side surface of the battery mounting portion case 11bc ₂ on the right side, and the front end portion and the rear end portion of each of the battery mounting portion cases 11bc ₁ and 11bc ₂ are integrally formed as the support member 11f. the pair of halves of the core portion 11bc ₃ and the pair of the fixing projections 11b ₁₁ of the half portion 11bc _4. In addition, the above-mentioned pressing portions 11b ₁₂ are swingably mounted on the pair of half-cut portions 11bc ₄ when assembling the left and right pair of battery mounting portion cases 11bc ₁ and 11bc ₂ , and are mounted as a pair of half-cut portions 11bc after assembly. ₃ is covered with the support member 11f. At this time, the support member 11f may be covered with rubber. Alternatively, it may be stuck with an adhesive.

In addition, the partition plate 11bc ₅ is connected from the front end portion to the rear end portion of each of the battery mounting portion housings 11bc ₁ and 11bc ₂ , and a lower end side wall portion 11bc ₆ is connected to the lower end portion of these side walls. The portion 11 bc ₆ forms a groove that supports the convex portions 13 b on the left and right sides of the battery 13 so as to be slidable in the front-rear direction. In addition, a circuit board 11bc ₇ having a terminal portion 11bc ₈ capable of being electrically connected to the terminal portion 13a of the battery 13 is formed in the battery mounting portion 11b.

The handle 11c and the suction tube portion 11d of the driving device 11 include the first, second, and third members 11x, 11y, and 11z. An LED substrate 11xs is provided in the first member 11x. The LED substrate 11xs includes a plurality of LED light sources that are turned on when the electric cleaner 1 is operating and when the suction force is strong. Further, the first member 11x, the flow outlet (not shown) and a second outlet member 11y _{11y. 11} connected to the pad is mounted 11xp, and the lock member is mounted above the hook member 11x and _{11x. 1} at the front end side ₂ . Furthermore, forgetting to install the filter member to prevent axial longitudinal direction is about 11x ₅ Q may be rotatably mounted in the suction tube ₁₂ provided in the rear portion of the outlet port 11d of the recess portion 11x (see FIG. 4, FIG. 9 (A)). This filter forgets to install the prevention member 11x ₅ (hereinafter, it may be referred to as ｢forgot to install the prevention member 11x ₅ )). Even if it is intended to attach the dust cup unit 12 without the filter unit 12c to the main body portion 11a of the driving device 11, Also cannot be installed. This point will be described in detail later.

(Dust Cup Unit) FIG. 10 is a dust cup showing an electric vacuum cleaner according to Embodiment 1, (A) is a perspective view, and (B) is an exploded view. In addition, FIG. 11 shows a dust cup of the electric vacuum cleaner according to the first embodiment. (A) is a front view, (B) is a cross-sectional view taken along the line II of FIG. Arrow sectional view. 12 is a dust cup unit, (A) is a horizontal cross-sectional view of a lower portion, and (B) is a vertical cross-sectional view.

Unit 12 includes a dirt cup having a bottom _{12a. 1,} the outer peripheral portion of the cylindrical portion 12a ₂ and the opening 12a of the dust collection container _{12a. 3,} an opening portion 12a of the dust collecting container fitted cup portion 12b 12a ₃ can be detachably housed in The screen portion 12c in the cup portion 12b, and the inner tube portion 12d detachably attached to the cup portion 12b so as to be housed in the dust container 12a.

(The dust collection container) dust collection container 12a, viewed from the front, center line P on the bottom of the outer peripheral portion 12a ₂ side 12a ₁ is provided with locking recesses 12a _21, and the outer peripheral portion P on the center line 12a ₂ of Locking protrusions 12a _{22 are} provided on the opening 12a ₃ side. Further, the dust collection container 12a, viewed from the front, the outer peripheral portion offset from the centerline 12a ₂ is provided with a position P of the air inlet comprises introducing the dust 12a _23.

Further, FIG. 12 (A) and the convex portion (B), the dust collection container 12a, a quadrangular pyramid is provided at a position toward the outside from the bottom center position of the _{offset. 1} 12a 12a _4. The convex portion 12a ₄ has a structure in which the dust accumulated in the lower space (the space between the dust collection container 12a and the small-diameter cylindrical portion 12d ₂₁ described later) in the dust collecting container 12a is prevented from swirling by the swirling airflow. Features.

(Cup) cup portion 12b has: a bottom having an inverted tapered hole in its center around an outer periphery of a cylindrical portion provided continuously at the bottom, provided on the outer _{12b. 1} and the second locking mechanism locks the first portion of the peripheral portion Fixed mechanism portion 12b ₂ , a pair of arc-shaped grooves 12b ₃ provided around a central hole below the bottom portion, a gasket 12b ₄ provided near the bottom portion of the outer peripheral portion, and an open end provided on the opposite side of the outer portion from the bottom portion Part of the notch part 12b ₅ . In addition, the cup portion 12b has a detection convex portion 12b ₆ provided in a lateral position of the cutout portion 12b ₅ on the outer peripheral surface. The function of the detection convex portion 12b ₆ will be described in detail later.

The first locking mechanism 12b ₁ has an inverted U-shaped rib portion provided on the outer peripheral surface of the cup portion 12b, a swinging piece 12b ₁₁ attached to the rib portion so as to swing about a horizontal axis, and a lower end of the swinging piece 12b ₁₁ and a The locking and disengaging manner is the locking claw 12b ₁₂ which is locked with the locking protrusion 12a _{22 of the} dust container 12a, and the coil spring 12b _{13 which} urges the locking claw 12b ₁₂ toward the locking protrusion 12a ₂₂ . .

The second locking mechanism 12b ₂ has a convex rib portion provided on the outer peripheral surface of the cup portion 12b, a slide member 12b ₂₁ slidably mounted on the rib portion in the vertical direction, and an upper end portion of the slide member 12b ₂₁ , which engaged disengageably with the cleaner main body and the engaging recessed portion 11a ₁₃ engaged 10 of the engagement pawls 12b _22, the engaging pawl 12b ₂₂ to engage the coil spring direction of the engagement recess portion 11a ₁₃ of the urging 12b _23. The second locking mechanism 12b ₂ includes, as a constituent element, the locking recessed portion 12c ₁₁ provided in the screen portion 12c described later.

(Screen section) The screen section 12c includes a pleated-shaped screen body 12c ₁ having an annular outer frame portion, and a pad portion 12c covering the outer peripheral portion of the outer frame portion of the screen body 12c ₁ . ₂ . The inner peripheral surface of the outer peripheral frame portion of the screen body 12c ₁ is provided with the above-mentioned locking recessed portion 12c ₁₁ which is opened inward in the radial direction, and a positioning convex portion 12c ₂₁ is provided on the outer peripheral surface of the cushion portion 12c ₂ .

The locking concave portions 12c ₁₁ and the positioning convex portions 12c ₂₁ are disposed at substantially opposite positions to each other. When the screen portion 12c is fitted into the opening portion of the cup portion 12b, the positioning convex portion 12c _{21 of} the screen portion 12c is dropped into the cutout portion 12b _{5 of the} cup portion 12b to perform positioning. Then, the locking recessed portion 12c _{11 of the} screen portion 12c is disposed at the position of the second locking mechanism 12b ₂ of the cup portion 12b. In addition, the cushion portion 12c ₂ is closely supported on a step portion provided on the inner peripheral surface of the opening portion of the cup portion 12b.

(Inner cylinder portion) The inner cylinder portion 12d includes a cylindrical screen portion 12d ₁ removably attached to the cup portion 12b and a cylindrical division member 12d ₂ removably attached to the cylindrical screen portion 12d ₁ . The cylindrical screen portion 12d ₁ includes a cylindrical frame body 12d ₁₁ having a plurality of slits extending in the axial direction, and a mesh member 12d ₁₂ provided on an outer peripheral portion of the cylindrical frame body 12d ₁₁ . The cylindrical frame body 12d ₁₁ has a pair of locking pieces 12d ₁₁₁ provided on the upper end of the outer peripheral portion thereof and capable of being detachably engaged with a pair of arc-shaped grooves 12b _{3 of the} cup portion 12b, and provided on the outer peripheral portion thereof. A pair of locking pieces 12d _{112 which are} locked at the lower end with a pair of arc-shaped grooves 12d _{231 to be} described later of the divided member 12d _{2 so} as to be able to be locked and disengaged.

The partition member having a small-diameter cylindrical portion 12d ₂ 12d _21, the large-diameter cylindrical portion 12d _22, connecting the upper end portion of the small-diameter cylindrical portion 12d ₂₁ and the large-diameter tubular portion of the flange portion of the inner circumferential surface of the 12d ₂₂ 12d _23. The flange portion 12d ₂₃ has provided thereon with the cylindrical strainer portion and a manner as to be locked out of the lower end of the pair of engaging portions 12d ₁ of the stopper piece 12d ₁₁₂ engaging the pair of the arc-shaped groove 12d _231.

As shown in FIGS. 12 (A) and 12 (B), the large-diameter cylindrical portion 12d ₂₂ has an outer flange 12d ₂₂₁ at its lower end. In addition, the flange 12d ₂₂₁ is elliptical in plan view. Due to the oval shape, the gap between the outer flange 12d ₂₂₁ and the dust collecting container 12a is uneven, forming a narrow gap S ₁ and a wide gap S ₂ . Accordingly, the lower portion of the dust collection container can be suppressed 12a accumulated in the dust raised by winding the gas G, by the dust attached to the suction filter portion of the cylindrical portion 12d of the inner cylinder _{12d. 1} produced decreases.

In further detail, the bottom portion 12a _{1 of the} dust collection container 12a is provided with the above-mentioned convex portion 12a _{4 for} preventing dust from swirling. However, the distance from the flange portion 12d _{23 of the} partition member 12d ₂ to the bottom portion 12a ₁ of the dust collection container 12a is short. Therefore, when there is no outer flange 12d ₂₂₁ , the dust that touches the convex portion 12a ₄ is lifted up and adheres to the circular mesh portion 12d ₁ above the partition member 12d ₂ and there is a possibility that the suction force may be reduced. In order to solve the above-mentioned problem, an outer flange 12d _{221 is} provided at the lower end of the partition member 12d ₂ so that the dust does not easily rise upward.

However, if the gap from the outer peripheral surface of the outer flange 12d ₂₂₁ to the inner peripheral surface of the dust collecting container 12a is too small, the attracted large dust will not enter below the outer flange 12d ₂₂₁ . Therefore, in the present invention, the gaps are made uneven, and the narrow gap S ₁ is formed at a place where the dust touching the convex portion 12 a ₄ is easily raised, and the wide gap S ₂ is formed at a place where the dust is not easily raised to make the gap larger. The dust can fall, and in this way, the outer flange 12d ₂₂₁ becomes oval. In this embodiment, the long diameter D _{1 of the} outer flange 12d ₂₂₁ is set to 61 mm, the short diameter D _{2 is} set to 57 mm, the narrow gap S _{1 is} set to 6 mm, and the wide gap S _{2 is} set to 8 mm. Limited to this. In addition, since the convex portion 12a ₄ is provided only at one place, the originally narrow gap S ₁ is sufficient only at one place. In the case of this embodiment, the partition member 12d ₂ and the cylindrical screen portion 12d ₁ have a structure that is detachable and is locked by a locking piece and an arc-shaped groove. This locking structure has the opposite structure even when rotated to 180 degrees. The locking mechanism can also be locked on the side. Therefore, depending on the locking position of the partition member 12d ₂ to the cylindrical filter portion 12d ₁ , there will be a narrow gap S _{1 that} will not be placed in a position where dust is easily raised. In this case, the narrow gap S ₁ is also provided on the opposite side of 180 degrees. In other words, the position of the narrow gap S ₁ on the convex portion 12 a ₄ becomes the same regardless of whether the partition member 12d ₂ pairs of the cylindrical screen portions 12d ₁ are locked on either side, that is, a pair of narrow gaps One of S ₁ must be located at a position where dust is easily raised, and the outer flange 12d _{221 is} formed into an oval shape in the above-mentioned manner.

In the assembled state of the dust cup unit 12, the small-diameter cylindrical portion 12d _{21 of the} partition member 12d ₂ is fitted into the positioning cylindrical portion 12a ₂₄ provided on the inner bottom surface of the dust collecting container 12a, and is lined with the lining provided around the positioning cylindrical portion 12a ₂₄ . The pads 12a ₂₅ abut. In this state, in the dust container 12a, a space is formed below the dust lumps accumulated in the large-diameter cylinder portion 12d ₂ of the partitioning member 12d ₂₂ a.

(Removal and Installation of the Dust Cup Unit to the Driving Device) As shown in FIGS. 9 (A) and (B), the above-mentioned forget-to-install prevention member 11x _{5 of the} driving device 11 is provided on the suction so as to be rotatable about the axis Q in the front-rear direction. The tube portion 11d. This mounting preventing member forget 11x _5, having a dirt cup unit 12 is not mounted in the state where the driving device 11 (FIG. 9 (A)) from the outer inlet cylinder portion 11d projecting downward first contact portion and accommodated in 11x ₅₁ The second abutting portion 11x _{52 is} sucked into the cylindrical portion 11d.

When attaching the dust cup unit 12 (with a filter portion 12c) to the cleaner body 10, first, with the dust cup unit 12 inclined with respect to the suction cylinder portion 11d, hook the locking recess 12a _{21 of the} dust cup unit 12 to The hook member 11x _{2 of the} cleaner body 10. Next, the hook member 11x ₂ is used as a fulcrum to make the dust cup unit 12 parallel to the suction cylinder portion 11d, the locking convex portion 11a _{12 of the} cleaner body 10 is locked to the locking recess portion 12c _{11 of the} dust cup unit 12, and the dust The engaging claws 12b ₂₂ of the second locking mechanism 12b ₂ of the cup unit 12 are engaged with the engaging recessed portions 11a _{13 of the} driving device 11 to complete the installation.

At this time, as shown in FIG 9 (A) and (B), the filter portion of the positioning protrusion 12c and 12c _{21 is} prevented from forgetting to mount the first member abutting portion of 11x ₅₁ 11x ₅ abuts the first abutting portion 11x _{51 is} pressed into the recessed portion 11x ₁₂ , thereby forgetting to install the 11x ₅ preventing rotation member, and the second abutment portion 11x ₅₂ also protrudes downward while rotating. However, the first abutting portion pressed deep into the 11x ₅₁ 11x ₁₂ within the recess, whereby the second abutment portion near the side of forgetting to mount 11x ₅₂ 11x ₅ while preventing member once again accommodated in the recess portion 11x _12. During this time, the detecting convex portion 12 of the dirt cup unit 12b ₆ are also moved toward the recess portion 11x _12, a detecting protrusion 12b ₆ while avoiding the second contact portion 11x ₅₂ while accommodated in the recess portion 11x _12.

When the dust cup unit 12 is removed from the cleaner body 10, with the sliding member 12b ₂₁ of the second locking mechanism 12b ₂ depressed, the dust cup unit 12 is positioned relative to the suction cylinder 11d with the hook member 11x ₂ as a fulcrum. Tilt so that it can be easily removed.

Next, a case where the dust cup unit in which the filter portion 12 c is not assembled in the cup portion 12 b is mounted on the driving device 11 will be described with reference to FIGS. 9A and 9B. For example, when the user forgets to assemble the filter portion 12c to the cup portion 12b and wants to install the dust cup unit on the driving device 11, as described above, the positioning convex portion 12c _{21 of the} filter portion 12c and the forgetting to install the preventing member 11x a first abutting portion ₅ of 11x ₅₁ abuts the first abutting portion can not 11x ₅₁ is pressed into the recess 11x _12, notched portion 12b of the cup portion 12b ₅ (see FIG. 10 (B)) close to the first contact portion 11x ₅₁ . Thus, the detecting convex portion 12b of the cup portion _{12b. 6} and forget to install the second abutment portion to prevent the member 11x ₅₂ 11x ₅ abuts ready to 11x ₅₂ second contact portion is pressed into the recessed portion 11x _12.

At this time, the detecting convex portion 12b _{6 is} ready to rotate the second abutting portion 11x ₅₂ to the side opposite to the first abutting portion 11x ₅₁ side, but the second abutting portion 11x ₅₂ is prevented from touching the side wall constituting the concave portion 11x ₁₂ . Turn. Thereby, the cup portion 12b cannot be closer to the suction cylinder portion 11d, and therefore, the engaging claws 12b ₂₂ of the second locking mechanism 12b ₂ of the dust cup unit are engaged with the engaging recessed portions 11a _{13 of the} driving device 11 and cannot be locked and cannot be locked. The dust cup unit (without the screen portion 12 c) is attached to the driving device 11.

Thereby, the user can notice that the filter portion is not assembled to the dust cup unit. That is, according to the electric vacuum cleaner of the present invention, users can notice that they forget to install a filter to promote the normal use of the electric vacuum cleaner, and can prevent the electric vacuum cleaner from being driven without the filter unit, thereby causing the drive device for sucking dust to malfunction. defect.

(Regarding Structure of Extension Tube) FIG. 13 is an extension tube of the vacuum cleaner according to the first embodiment. (A) is a front view, (B) is a side view, and (C) is a cross-sectional view taken along line I-I of (A). FIG. 14 is an exploded view of the extension tube of FIG. 13 (A), and FIG. 15 is an explanatory view showing the internal structure of the extension tube of FIG. 13 (A) as viewed from the front sides of the first and second connection pipe sections. FIG. 16 is a cross-sectional view of the pipe body of the extension pipe of FIG. 13 (A), and FIG. 17 is a diagram illustrating a laminated structure of the pipe body of the extension pipe of FIG. 13 (A).

The extension tube 20 includes a circular tube body 21, a cylindrical first connection tube portion 22 provided at one end portion of the tube body 21 and detachably connected to the cleaner body, and a removable end portion provided at the other end portion of the tube body 21. A cylindrical second connection pipe portion 23 connected to the suction port body and a conductive unit 24 provided from the first connection pipe portion 22 to the second connection pipe portion 23.

(Tube main body) The tube main body 21 is a tube-shaped carbon fiber layer 21a which is laminated in multiple layers. In the first embodiment, the multilayered laminated carbon fiber layer 21a is formed by sequentially laminating the first cylindrical carbon fiber layer 21a ₁ , the second cylindrical carbon fiber layer 21a ₂ , and the third cylindrical carbon fiber layer 21a ₃ from the inside. Further, the cylindrical outer peripheral surface of the third carbon fiber layer 21a ₃ as the outermost layer laminated with a resin coating 21b. Next, it is processed into dry carbon fiber (Dry Carbon). Dry carbon fiber is molded in a pressure-proof furnace using a pressure-resistant device capable of making the inside high pressure.

A first cylindrical carbon fiber layer 21a ₁ formed of unidirectional carbon fiber sheet having a plurality of carbon fibers extending parallel to the longitudinal direction of the tube. The second cylindrical carbon fiber layer 21a ₂ and the third cylindrical carbon fiber layer 21a _{3 are} composed of bidirectional carbon fiber sheets having warp and weft threads of a plurality of carbon fibers. As the unidirectional carbon fiber sheet and the bidirectional carbon fiber sheet, a commercially available prepreg sheet impregnated with a resin between the carbon fibers can be used. In addition, a plurality of carbon fibers can be composed of filaments that cross diagonally except warp and weft. In addition, it is also possible to freely combine the crossover, the combination of warp and weft, and the like.

The tube body 21 can be manufactured by using a commercially available prepreg sheet by forming and laminating the first to third cylindrical carbon fiber layers 21a ₁ to 21a ₃ by a known method using a mold. For example, there is a method of winding around a shaft such as a metal rod. In addition, in the case of the first embodiment, small cutout portions 21n for positioning the connection positions with the first and second connection pipe portions 22 and 23 are formed by cutting at opposite positions of the two end portions of the pipe body 21 after formation. .

In the pipe body 21, a first thickness T of the cylindrical carbon fiber layer 21a _{1 1} is about 0.1mm, the thickness of the second and third cylindrical carbon fiber layer 21a _2, 21a ₃ of T _2, T _3, respectively, is about 0.3mm, the resin The thickness T ₄ of the coating layer ₂₁ b is about 0.1 mm, and the overall thickness T ₅ is about 0.8 mm. In addition, the thicknesses of the first to third cylindrical carbon fiber layers 21a ₁ to 21a ₃ are derived from the thicknesses of the unidirectional and bidirectional carbon fiber sheets used in the formation.

In addition, each cylindrical carbon fiber layer 21a has two end portions extending in the longitudinal direction of the tube, and has end surface abutment portions 21ax in which end surfaces of the two end portions abut each other. In addition, the end face abutting portion 21ax is a portion where the end faces of the both ends of the unidirectional and bidirectional carbon fiber sheets used when forming the cylindrical carbon fiber layers 21a are welded to each other. In the tube body 21, the end surface abutment portions 21ax of the other cylindrical carbon fiber layer 21a adjacent to the end surface abutment portions 21ax of one cylindrical carbon fiber layer 21a are disposed at positions that do not overlap each other. In the first embodiment, each of the end-face abutting portions 21ax is disposed at a position shifted by 120 ° from the center angle. As described above, by staggering the positions of the end surface abutting portions 21ax in the circumferential direction, unevenness in the rigidity and strength of the pipe body does not occur.

Since each of the cylindrical carbon fiber layers 21 a has an end surface abutment portion 21ax, each of the cylindrical carbon fiber layers 21 a is formed as a layer having a uniform thickness without a step. That is, when three layers of carbon fiber sheets are wound around a metal rod during the manufacture of the pipe body, a step difference occurs between the end portion of the first layer and the start end portion of the second layer, and between the end portion of the second layer and the start end portion of the third layer. However, in the pipe main body 21 of the first embodiment, the three layers of the first to third cylindrical carbon fiber layers 21a ₁ to 21a ₃ are independent layers, so such a step does not occur. Therefore, the tube body 21 is formed with a uniform thickness, and has uniform rigidity as a whole.

(First connection pipe portion) The first connection pipe portion 22 is a portion connected to the cleaner body 10 and includes a connection pipe body 22a, a small piece 22b, and a (first) cover member 22c. The connecting pipe body 22 a has a (first) fixing portion 22 a ₁ inserted into one end portion of the pipe body 21 and fixed by an adhesive, and a pair of male terminal portions 24 a ₂ (described later) connected to the fixing portion 22 a ₁ and holding the conductive unit 24 (described later) First) The terminal holding portion 22a ₂ and the insertion portion 22a ₃ connected to the terminal holding portion 22a ₂ and inserted into the front opening portion 11d ₁ of the cleaner body 10.

The fixing portion 22a ₁ has a pair of supporting pieces 22a ₁₁ on one end portion of a support plate 24b to be described later, which carries the conductive unit 24 on the inner peripheral surface, and a boundary portion with the terminal holding portion 22a ₂ on the outer peripheral surface. The positioning protrusion 22a ₁₂ engaged with the notch portion 21n. The terminal holding portion 22a ₂ has a concave portion on the positioning convex portion 22a ₁₂ side of the outer peripheral surface, and a pair of male terminal portions 24a ₂ and a lead 24a _{1 of the} conductive unit 24 are formed in the concave portion to pass through from the inside to the outside (the first A) Exit 22a ₂₁ .

Further, in the recessed portion of the terminal holding portion 22a ₂ is provided a rib structure 22a ₂₂ that holds a pair of male terminal portions 24a ₂ at a predetermined interval in parallel with each other, and a self-tapping screw 22d for mounting the cover member 22c into which a projection is screwed. Seat portion 22a ₂₃ . The insertion portion 22a ₃ has an engaging recessed portion 22a ₃₁ on the outer peripheral surface of the positioning convex portion 22a ₁₂ side for engaging with the engaging claws 11x ₁₁ of the locking member 11x of the cleaner body 10 in a detachable manner.

The small piece 22b is a member covering the outlet 22a ₂₁ of the connection pipe body 22a through which the pair of leads 24a _{1 is} inserted, and when the electric vacuum cleaner 1 is used, dust in the air passing through the extension tube 20 does not pass from the outlet 22a ₂₁ The male terminal portion 24a _{2 has} a function of flowing in and protects the male terminal portion 24a ₂ . A cover member 22c, 22d by the self-tapping screw portion 22a screwed into the boss _{23 is,} cover the terminal holding recess portion 22a of the connection pipe ₂ of the body 22a, and the pressing pieces 22b fixed to the connecting pipe body 22a.

(Second Connection Pipe Section) The second connection pipe section 23 is a portion connected to the suction port body 40 and includes a connection pipe body 23a, a small piece 23b, a locking member 23c, a coil spring 23d, and a (second) cover member 23e. The connecting tube body 23a has a (second) fixing portion 23a ₁ inserted into the other end portion of the tube body 21 and fixed by an adhesive, and a pair of female terminal portions 24a ₃ described later connected to the fixing portion 23a ₁ and holding the conductive unit 24. (Second) terminal holding portion 23a ₂ .

The fixing portion 23a ₁ has a pair of supporting pieces (not shown) at the other end portion of the supporting plate 24b that carries the conductive unit 24 on the inner peripheral surface, and has a connection with the pipe body at the boundary portion with the terminal holding portion 23a ₂ on the outer peripheral surface. 21 The positioning convex portion 23a ₁₂ engaged with the other notch portion 21n. The terminal holding portion 23a ₂ has a recessed portion on the positioning convex portion 23a ₁₂ side of the outer peripheral surface, and a pair of female terminal portions 24a ₃ and a lead 24a _{1 of the} conductive unit 24 are formed to pass through from the inside to the outside (the first B) Exit 23a ₂₁ . Further, the recessed portion of the terminal holding portion 23a ₂ is provided with a rib structure 23a ₂₂ that holds a pair of female terminal portions 24a ₃ parallel to each other at a predetermined interval, and a projection that the self-tapping screw 22f of the cover member 23e is screwed in. Seat section 23a ₂₃ .

Lock member 23c has a shaft portion 23c _1, so as to sandwich the button portion 23c of the shaft portion 23c provided _{continuously. 1} and ₂ the locking claw portion 23c _3, mounted in the recess portion of the terminal holding portions 23a _2. At this time, the shaft portion 23c ₁ is rotatably mounted on the rib structure 23a ₂₂ . In addition, the locking claw portion 23c ₃ may protrude from the hole portion formed in the bottom surface of the recessed portion of the connection pipe body 23a into the connection pipe body 23a. The coil spring 23d is provided in the recessed portion of the connecting pipe body 23a to urge the button portion 23c _{2 of the} locking member 23c outward.

The small piece 23b is a member covering the lead-out port 23a ₂₁ of the connection tube body 23a through which the pair of lead wires 24a _{1 is} inserted, and when the electric vacuum cleaner 1 is used, dust in the air passing through the extension tube 20 does not pass through the lead-out port 23a ₂₁ The function of flowing in the female terminal portion 24a ₃ side and protecting the female terminal portion 24a ₃ . The lid member 23e has a lock member 23c of the knob portion 23c hole portion _{23e. 1 2} exposed to the outside, the cover member 23e, 22f by the self-tapping screw portion 23a screwed into the boss _{23 is,} cover the terminal body 23a of the connection pipe The holding portion 23a _{2 is} a recessed portion, and the pressing small piece 23b is fixed to the connecting pipe body 23a so that the locking member 23c does not fall off.

(Conductive unit) FIG. 18 is a conductive unit of the extension tube of FIG. 13 (A), (A) is a front view, (B) is a side view, and (C) is a rear view. FIG. 19 is an exploded view of the conductive unit of FIG. 18 (A). In addition, FIG. 20 (A) is a sectional view taken along the arrow II of FIG. 18 (A), (B) is a sectional view taken along the arrow II-II of FIG. 18 (A), and (C) is a sectional view taken from FIG. 18 (A). Sectional view of arrow III-III. 21 is a view showing leads in the cover plate of the conductive unit of FIG. 18 (A), and FIG. 22 is a cross-sectional view of a first connection pipe portion of the extension pipe of FIG. 13 (A). The cross-sectional views of FIGS. 20 (A) and (C) are cross-sections of the position of the protruding piece 24c ₂ described later.

The conductive unit 24 includes a pair of conductor cables 24 a and an elongated hollow plate 24 x that houses the pair of conductor cables 24 a. The hollow plate 24x includes a support plate 24b and a cover plate 24c that sandwich a pair of guide cables 24a, and these are integrated by ultrasonic welding when the conductive unit 24 is assembled. Moreover, you may integrate an adhesive agent. The pair of guide cables 24a and the support plate 24b have a length longer than the tube body 21, the pair of guide cables 24a have a length longer than the support plate 24b, and the support plate 24b has a longer length than the cover plate 24c.

Each lead cable 24a includes a lead 24a ₁ covered with an insulating tube, a pin-shaped male terminal portion 24a ₂ electrically connected to both ends of the lead 24a ₁ , and a clip-shaped female terminal portion 24a ₃ . In a state where the extension pipe 20 is connected to the cleaner body 10 and the suction port body 40, the male terminal portion 24a _{2 of the} extension pipe 20 is inserted into the female terminal portion 11y _{12 of the} cleaner body 10 and electrically connected, and a male terminal of the suction port body 40 described later The portion 42 a (see FIG. 23) is inserted into the female terminal portion 24 a _{3 of the} extension tube 20 and is electrically connected.

The support plate 24b includes a base portion 24b ₁ having a concave cross-sectional shape, and a pair of hook pieces 24b ₂ provided along the upper end portions of both side surfaces of the base portion 24b ₁ and formed of an insulating resin (for example, ABS resin). . The bottom of the base portion 24b ₁ of the support plate 24b that carries the cover plate 24c is flat.

Having a cover plate 24c: 24c _1, and the projecting pieces 24c provided on the outside of both end portions of the base _{portion. 1} a cross-sectional shape of the base portion has a substantially m-shaped 24c _2, are formed in an insulating resin (e.g., ABS resin) . In addition, the pair of protruding pieces 24c ₂ at both ends have a function of blocking walls so that foreign matter such as garbage does not enter between the pair of protruding pieces 24c ₂ . The base portion 24c ₁ has a pair of groove portions 24c ₁₁ which are provided along the longitudinal direction at the central portion in the axial direction and individually accommodate the pair of guide cables 24a.

In addition, the cross-sectional shape of the outer surface of the base portion 24c ₁ on the side opposite to the groove portion 24c ₁₁ is an arc shape, and the cross-sectional shape of the outer surface of the protruding piece 24c ₂ is also an arc shape. In addition, the outer cross-sectional shape of the pair of hook pieces 24b ₂ of the support plate 24b includes an arc-shaped portion 24b ₂₁ and a flat surface portion 24b _{22 that} are continuous with the arc shape of each of the protruding pieces 24c ₂ of the cover member 24c.

In addition, the base portion 24c _{1 is provided} with a pair of hemispheres at the both end portions 24ce and the middle portion 24cc of the pair of groove portions 24c ₁₁ to sandwich the leads 24a ₁ housed in the groove portions 24c ₁₁ to prevent positional displacement. Shaped ribs 24c ₃ . In addition, the hemispherical ribs 24c ₃ may not be a pair, there may be only one, or they may be arranged alternately at equal intervals. In addition, a pair of protruding portions 24c _{4 are} provided on both sides of each groove 24c _{11 of the} base portion 24c ₁ along the longitudinal direction.

The conductive unit 24 accommodates each guide cable 24a in each groove portion 24c ₁₁ of the cover plate 24c, covers the groove portion 24c ₁₁ side with the support plate 24b, and then contacts the inner surface of the support plate 24b and one of the cover plate 24c. 24c ₄ ultrasonic welding of projections. Alternatively, bonding may be performed with an adhesive instead of ultrasonic welding. In the assembled conductive unit 24, the support plate 24b is longer than the cover plate 24c, and each of the guide cable wires 24a is longer than the support plate 24b. Therefore, part of both ends of each guide cable wire 24a is supported by the support plate 24b and exposed to the outside. In addition, although the guide cable 24a is a pair of guide cables, it is not limited to this. For example, the conductor cable may be one. In this case, two conductor cables may be passed through one cable to form one cable. In this case, the cable is passed through either of the two slots 24c ₁₁ (see FIG. 20).

(Assembly of Extension Tube) Next, an example of assembly of the extension tube 20 will be described. First, after the conductive unit 24 is inserted through the tube body 21, a pair of male terminal portions 24 a ₂ and a pair of female terminal portions 24 a _{3 of the} conductive unit 24 are assembled in the first connection pipe portion 22 and the second connection pipe portion 23.

A pair of male terminal portions 24a _{2 are} inserted into the connection pipe body 22a of the first connection pipe portion 22, and are led out from the outlet 22a ₂₁ to the outside and fixed to the rib structure 22a ₂₂ . A pair of male terminal portions 24a ₂ fixed to the rib structure 22a ₂₂ protrudes from the rib structure 22a _{22 in} the longitudinal direction of the pipe. At this time, one end portion of the conductive side 24b of the unit support plate 24 a pair of hooks ₂ mounted on a plate 24b in the connecting pipe body 22a a pair of carrier plate 22a _11.

In addition, the portions of the conductive unit 24 facing the inner surfaces of the tube body 21, the first and second connecting tube portions 22, 23, that is, the outside of the pair of hook pieces 24b ₂ of the support plate 24b and the outside of the cover plate 24c The arc-shaped surface is formed so that the conductive unit 24 can follow the inner surfaces of the tube body 21 and the first and second connecting tube portions 22 and 23.

Subsequently, the die member 22b and the cover 22c is mounted in the connecting pipe body 22a, to secure the connection pipe portion 22a of the body 22a is inserted through the _{adhesive. 1} is fixed in one end portion of the tube body 21. At this time, the positioning convex portions 22 a _{12 of} the first connecting pipe portion 22 are engaged with the notch portions 21 n of the pipe body 21 and positioned.

A pair of female terminal portions 24a _{3 are} inserted into the connection pipe body 23a of the second connection pipe portion 23, and are led out from the outlet 23a ₂₁ to the outside and fixed to the rib structure 23a ₂₂ . A pair of female terminal portions 24a ₃ fixed to the rib structure 23a ₂₂ communicates with a pair of hole portions provided in the rib structure 23a ₂₂ . At this time, the other pair of support conductive unit 24 of the plate 24b side end portion 24b of the latch portion ₂ is placed on one pair of the connection pipe main body 23a on the carrier plate 22a ₁₁ (refer to FIG. 22). Thereby, both ends of the conductive unit 24 are supported by the first and second connecting pipe portions 22 and 23, so that the conductive unit 24 can maintain a floating posture even if it is supported in the pipe body 21. Since the conductive unit 24 is supported in the pipe body 21 only by the two sides of the first and second connecting pipe portions 22 and 23, the pipe body 21 does not need a special design, which can reduce the cost and improve the assemblability. In addition, in order to prevent the conductive unit 24 from being separated from the inner surface of the pipe body 21 due to bending, a cross section of the support plate 24b is formed in a short U-shape, and a cross section of the cover plate 24c is formed in a W-shape, respectively with respect to the longitudinal direction With ribs.

Subsequently, the small pieces 23b and the lid member 23e is mounted in the connecting pipe body 23a, to secure the connection pipe portion 23a of the body 23a is inserted through the _{adhesive. 1} is fixed in the other end portion of the tube body 21. At this time, the positioning convex portions 23 a _{12 of} the second connection pipe portion 23 are engaged with the notch portions 21 n of the pipe body 21 to perform positioning. Thereby, the assembly of the extension tube 20 is completed.

(About a suction inlet body) FIG. 23: is a bottom view which shows the suction inlet body of the vacuum cleaner of Embodiment 1 and FIG. 24 is a side view of the suction inlet body shown in FIG. 25 is a cross-sectional view taken along the line I-I of the suction port body shown in FIG. 23, and FIG. 26 is a cross-sectional view taken along the line II-II of the suction port body shown in FIG. 23. As shown in Figs. 23 to 26, the suction port body 40 includes a bottom plate portion 41a, a top plate portion 41b opposed to the bottom plate portion 41a, and a front plate portion 41c and a rear plate provided in the forward and backward directions (direction of arrow X in Fig. 23). The part 41d, the left side plate part 41e, and the right side plate part 41f provided in the left-right direction of a travel direction.

The suction port body 40 includes, as shown in FIG. 23, a suction port 41 provided in the bottom plate portion 41 a and extending in the left-right direction (direction of arrow A1), a connection pipe portion 42 connected to the rear of the suction port 41 through a connection shaft portion 42a, and A rotating brush 43 provided on the suction port body 41 rotatably about an axis extending in the left-right direction, a suction flow path 16 (FIG. 25) connecting the suction port 41 and the connecting pipe portion 42, and a rotating brush motor 44 that drives the rotating brush 43 (FIG. 26), the brush cover member 80 which covers the left end part of FIG. 23 of the rotating brush 43, and the lift detection side switch 47 and the wheel 54 provided in the bottom-plate part 41a.

As shown in FIG. 26, the motor output gear 50 fixed to the motor output shaft 46 of the rotating brush motor 44 and the gear portion 58 attached to the rotating brush 43 are coupled by a timing belt 48.

Therefore, when the start switch of the operation unit 11e (FIG. 1) is activated and the floor cleaning operation is started, the dust brushed into the floor by the rotating brush 43 driven by the rotating brush motor 44 passes through the suction port 41 through the suction flow path 16 It is transported to the dust cup unit 12 (Fig. 1) with the connection pipe.

The lift detection side switch 47 includes a swing lever portion having a wheel, a switch body supporting the swing lever portion to be swingable, and a spiral torsion spring that urges the swing lever portion downward, and the switch body is connected to the rotation accommodated in the bottom plate portion 41a. The brush motor drives the substrate, and the wheels of the swing lever portion are exposed downward from the bottom plate portion 41a.

When the suction port body 40 is lifted off the ground, the detection-side switch 47 is lifted to forcibly stop the driving of the rotary brush motor 44.

A pair of lead wires electrically connected to the rotating brush motor 44 and the lift detection switch 47 are provided inside the suction port body 40, and the pair of lead wires are electrically connected to a pin-shaped pair of male terminal portions provided in the pipe portion 42. 42a. In addition, a locking recess 42b is provided at a front end portion of the tube portion 42.

The suction port body 40 configured as described above is detachably connected to the second connection pipe portion 23 of the extension pipe 20. At this time, a pair of male terminal portions 42b of the suction port body 40 are inserted into a pair of female terminal portions 24a _{3 of the} extension tube 20 to be electrically connected, and the locking claw portions 23c ₃ of the locking member 23c of the extension tube 20 can be snapped. The detachment prevention means is locked on the locking recess 42 b of the suction port body 40 (see FIGS. 1, 13, and 14).

(Embodiment 2) In Embodiment 1, the extension pipe 20 provided with the first and second connection pipe sections 22 and 23 at both ends of the pipe body 21 is illustrated, but the first and second connection pipe sections 22 may be omitted. , twenty three. In this case, the male terminal portion and the female terminal portion at both ends of the conductive unit 24 are fixed to both end portions in the tube body.

(Embodiment 3) Although the extension tube of an upright electric vacuum cleaner was demonstrated in Embodiment 1, the extension tube of this invention is applicable also to a horizontal electric vacuum cleaner.

(Summary) An extension tube of an electric vacuum cleaner according to the present invention includes a tube body and a conductive unit provided to be inserted through the tube body; the conductive unit includes a conductive cable and a hollow plate that houses the conductive cable.

The extension tube of the electric vacuum cleaner of the present invention may be configured as described below, or the following configurations may be appropriately combined. (1) The hollow plate includes a support plate and a cover plate which sandwich the guide wire into the cover. With this configuration, the conductive unit can be easily assembled.

(2) The guide cable and the support plate have a longer length than the pipe body, the guide cable has a length longer than the support plate, and the support plate has a longer length than the cover plate. According to this configuration, it is possible to easily provide the connection portions between the suction port body and the cleaner body provided in the motor and the rotary brush at both ends of the tube body.

(3) The support plate has a base portion and a pair of hook pieces, the base portion has a concave cross-sectional shape, and the pair of hook pieces are provided along upper end portions of both side surfaces of the base portion. According to this configuration, if a pair of load-bearing pieces are provided in the tube body or the connection portion at both ends of the tube body, a pair of hook pieces at both ends of the conductive unit can be hooked and held on the pair of load-bearing pieces.

(4) The base portion of the support plate has a flat bottom carrying the cover plate; the cross-sectional shape of the outer surface of the cover plate is formed into an arc shape. According to this configuration, the conductive unit can be arranged along the inner surface of the cylindrical pipe body, thereby ensuring a wide space through which the airflow in the pipe body passes.

(5) The cover plate has a groove portion provided along the longitudinal direction at the central portion in the width direction and accommodating the guide wire individually. According to this configuration, each of the conductor cables can be individually protected in each groove portion, and the insulation between the conductor cables can be improved.

(6) Both ends and a middle portion of the groove portion of the cover plate are respectively provided with a hemispherical rib portion that clamps the conductor cable accommodated in the groove portion to prevent positional displacement. According to this configuration, it is possible to prevent the lead wires from being shaken in the respective groove portions and the damage caused by the shaking, so it is possible to improve the protection performance of the respective lead wires in the respective groove portions.

In addition, it should be thought that embodiment shown in this specification is an illustration and restrictive at no points. The scope of the present invention is shown not by the above description but by the scope of patent application, and it is intended to include all modifications within the meaning and scope equivalent to the scope of patent application.

The present invention can be used as an extension tube of an electric vacuum cleaner such as an upright or horizontal type.

1‧‧‧ electric vacuum cleaner

20‧‧‧ extension tube

21‧‧‧ tube body

24‧‧‧Conductive unit (conductive part)

24a‧‧‧conductor cable

24b‧‧‧Support plate

24b ₁ ‧‧‧ base

24b ₂ ‧‧‧ hook piece

24c‧‧‧ Cover

24c ₁₁ ‧‧‧Slot

24c ₃ ‧‧‧ Hemispherical ribs

24x‧‧‧ hollow board

FIG. 1 is a left side view showing an electric vacuum cleaner according to a first embodiment of the present invention. Fig. 2 is a perspective view showing a cleaner body of the electric cleaner according to the first embodiment. FIG. 3 is a left side cross-sectional view showing an internal structure of an operation portion provided on a handle of the cleaner body of FIG. 2. FIG. 4 is a left side sectional view showing the internal structure of the cleaner body of FIG. 2. FIG. 5 is a perspective view showing a state in which a housing of the driving device of the cleaner body of FIG. 2 is disassembled. Fig. 6 is a view showing the electric vacuum cleaner of the first embodiment, where (A) is a state of being placed on the ground, and (B) is a state of being laid down on the ground. Fig. 7 is an exploded view of a driving device of the electric vacuum cleaner of the first embodiment. FIG. 8 (A) is a left side view of the driving device, and (B) is a left side view of the cleaner body. FIG. 9 (A) is a sectional view taken along the line I-I of FIG. 8 (A), and FIG. 9 (B) is a sectional view taken along the line I-I of FIG. 8 (B). Fig. 10 shows a dust cup of the electric vacuum cleaner of the first embodiment, (A) is a perspective view, and (B) is an exploded view. 11 is a dust cup showing the vacuum cleaner of the first embodiment, (A) is a front view, (B) is a cross-sectional view taken along a line II- (A), and (C) is a view taken along a line II-II (A). Sectional view. FIG. 12 is a dust cup unit, (A) is a horizontal cross-sectional view of a lower part, and (B) is a vertical cross-sectional view. Fig. 13 is an extension tube of the electric vacuum cleaner of the first embodiment, (A) is a front view, (B) is a side view, and (C) is a cross-sectional view taken along the line I-I of (A). Fig. 14 is an exploded view of the extension tube of Fig. 13 (A). FIG. 15 is an explanatory diagram showing the internal structure of the extension tube of FIG. 13 (A) as viewed from the front sides of the first and second connection tube portions. FIG. 16 is a cross-sectional view of a pipe body of the extension pipe of FIG. 13 (A). FIG. 17 is a diagram illustrating a laminated structure of a pipe body of the extension pipe of FIG. 13 (A). FIG. 18 is a conductive unit of the extension tube of FIG. 13 (A), (A) is a front view, (B) is a side view, and (C) is a rear view. FIG. 19 is an exploded view of the conductive unit of FIG. 18 (A). FIG. 20 (A) is a cross-sectional view taken along the arrow II of FIG. 18 (A), (B) is a cross-sectional view taken along the arrow II-II of FIG. 18 (A), and (C) is III- III line arrow sectional view. FIG. 21 is a view showing leads in a cover plate of the conductive unit of FIG. 18 (A). Fig. 22 is a cross-sectional view of a first connection pipe portion of the extension pipe of Fig. 13 (A). Fig. 23 is a bottom view showing a suction port body of the electric vacuum cleaner according to the first embodiment. FIG. 24 is a side view of the suction port body shown in FIG. 23. Fig. 25 is a sectional view taken along the line I-I of the suction port body shown in Fig. 23. FIG. 26 is a sectional view taken along the line II-II of the suction port body shown in FIG. 23. FIG.

Claims (7)

An extension tube of an electric vacuum cleaner includes a tube body and a conductive unit configured to be inserted through the tube body; the conductive unit includes a conductive cable and a hollow plate that houses the conductive cable. For example, the extension tube of the electric vacuum cleaner according to the first patent application scope, wherein the hollow plate has a support plate and a cover plate that sandwich the guide cable into the cover. For example, the extension tube of the electric vacuum cleaner according to the second patent application scope, wherein the guide cable and the support plate have a longer length than the tube body, the guide cable has a length longer than the support plate, and the support plate has Longer than the cover. For example, the extension tube of an electric vacuum cleaner according to item 2 or 3 of the patent application scope, wherein the support plate has a base portion and a pair of hook pieces, the base portion has a concave cross-sectional shape, and the pair of hook pieces are along Upper ends of both sides of the base portion are provided. For example, the extension pipe of the electric vacuum cleaner according to item 4 of the patent application, wherein the base portion of the support plate has a flat bottom supporting the cover plate; the cross-sectional shape of the outer surface of the cover plate is formed into an arc shape. The extension tube of the electric vacuum cleaner according to any one of claims 2 to 4, wherein the cover plate has a groove portion provided along a long side direction in a central portion in the width direction and accommodating the guide wire individually. For example, the extension pipe of the electric vacuum cleaner according to item 6 of the patent application, wherein the two ends and the middle portion of the groove portion of the cover plate are respectively provided with the guide cable clamped and housed in the groove portion to prevent positional deviation. Shifted hemispherical ribs.