JPWO2018087937A1 - Extension tube of vacuum cleaner - Google Patents

Abstract

An object of the present invention is to provide an extension tube of a vacuum cleaner that is light in weight and easy to grip and has improved operability. An extension tube of a vacuum cleaner comprising a tube main body and a conductive unit provided so as to be inserted through the tube main body, the conductive unit having a conductive cable and a hollow plate for housing the conductive cable.

Description

  The present invention relates to an extension tube of a vacuum cleaner.

  As an extension tube of a conventional vacuum cleaner, in Patent Document 1, a tube body, a cover member extending in a longitudinal direction attached to the outer surface of the tube body, and a gap between the tube body and the cover member are provided. An insulating resin plate and a lead wire supported on the insulating resin plate are provided, and both ends of the lead wire are exposed to the outside so as to be electrically connected to the vacuum cleaner main body and the terminal portion of the suction port body. Extension tubes have been proposed.

JP 2012-249699 A

  As in Patent Document 1, an extension pipe provided with an insulating resin plate, a lead wire, and a cover member along the longitudinal direction of the outer surface of the pipe body becomes thick, so that the weight of the entire extension pipe increases and the extension pipe As a result, there is a problem that the operability when operating the moving direction of the suction port through the extension pipe is lowered.

  This invention is made | formed in view of such a subject, and it aims at providing the extension pipe | tube of the vacuum cleaner which aims at weight reduction and ease of grasping, and improves operativity.

Thus, according to the present invention, the pipe body and the conductive unit provided so as to be inserted through the pipe body,
The conductive unit is provided with a conductive cable and an extension tube of a vacuum cleaner having a hollow plate for storing the conductive cable.

  The extension pipe of the present invention connects, for example, a suction mouth body containing a rotating brush driven by a motor and a cleaner body, supplies power from the cleaner body to the motor via the extension pipe, and rotates the suction mouth body. It can be applied to a vacuum cleaner that cleans the floor while rotating the brush. In addition, this extension pipe is a compact conductive unit in the pipe body, and the pipe body does not become thicker, so it is lighter and easier to grip. The operability when operating the moving direction of the mouth is improved.

It is a left view which shows the vacuum cleaner in Embodiment 1 of this invention. It is a perspective view which shows the cleaner main body in the electric vacuum cleaner of Embodiment 1. FIG. It is a left side sectional view showing the internal structure of the operation part provided in the handle of the cleaner body of FIG. It is a left side sectional view showing the internal structure of the cleaner body of FIG. It is a perspective view which shows the state which decomposed | disassembled the housing | casing in the drive device of the cleaner body of FIG. It is a vacuum cleaner of Embodiment 1, Comprising: (A) is the state put on the floor surface, (B) is a figure which shows the state which laid down on the floor surface. It is an exploded view of the drive device in the electric vacuum cleaner of Embodiment 1. (A) is a left side view of the drive device, and (B) is a left side view of the cleaner body. (A) is an II arrow sectional view in Drawing A (A), and (B) is an II arrow sectional view of Drawing A (B). It is a dust cup in the vacuum cleaner of Embodiment 1, Comprising: (A) is a perspective view, (B) has shown the exploded view. It is a dust cup in the vacuum cleaner of Embodiment 1, Comprising: (A) is a front view, (B) is II sectional view taken on the line of (A), (C) is the II-II arrow view of (A). A cross-sectional view is shown. It is a dust cup unit, (A) is a plane sectional view of the lower part, (B) is a side sectional view. It is an extension pipe in the electric vacuum cleaner of Embodiment 1, Comprising: (A) is a front view, (B) is a side view, (C) is a II arrow sectional view of (A). FIG. 14 is an exploded view of the extension tube of FIG. It is explanatory drawing which shows the internal structure seen from the front side of the 1st and 2nd connecting pipe part in the extension pipe | tube of FIG. 13 (A). It is a cross-sectional view of the tube body in the extension tube of FIG. It is a figure explaining the laminated structure of the pipe body in the extension pipe of Drawing 13 (A). It is the electroconductive unit in the extension pipe | tube of FIG. 13 (A), (A) is a front view, (B) is a side view, (C) is a rear view. FIG. 19 is an exploded view of the conductive unit of FIG. 18A is a cross-sectional view taken along the arrow II in FIG. 18A, FIG. 18B is a cross-sectional view taken along the line II-II in FIG. 18A, and FIG. It is III sectional view taken on the line. It is a figure which shows the lead wire in the cover plate in the electroconductive unit of FIG. It is a cross-sectional view of the 1st connection pipe part in the extension pipe of Drawing 13 (A). It is a bottom view which shows the suction inlet in the electric vacuum cleaner of Embodiment 1. It is a side view of the suction inlet shown in FIG. It is II sectional view taken on the line of the suction inlet shown in FIG. It is II-II arrow sectional drawing of the suction inlet shown in FIG.

(Embodiment 1)
FIG. 1 is a left side view showing the electric vacuum cleaner according to Embodiment 1 of the present invention.
The vacuum cleaner 1 according to the first embodiment includes a cleaner body 10, an extension pipe 20, and a suction port body 40. The extension pipe may not be related to the presence or absence of a structure capable of extending the pipe itself. Compared to the handy type that cleans by directly attaching the suction port to the vacuum cleaner body, when cleaning the vacuum cleaner body by attaching it to the vacuum cleaner body via the extension pipe, It can be cleaned as a stick type with a longer distance.

<About the vacuum cleaner body>
2 is a perspective view showing a vacuum cleaner body in the electric vacuum cleaner of Embodiment 1, and FIG. 3 is a left side sectional view showing an internal structure of an operation unit provided on a handle of the vacuum cleaner body of 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 state in which the housing of the drive device of the cleaner body of FIG. 2 is disassembled. Moreover, FIG. 6 is the vacuum cleaner of Embodiment 1, (A) is the state put on the floor surface, (B) is a figure which shows the state which laid down on the floor surface.
The cleaner body 10 includes a drive device 11, a dust cup unit 12 and a battery 13 that are detachably attached to the drive device 11.

[Driver]
As shown in FIGS. 2, 4, and 5, the driving device 11 includes a main body portion 11 a that houses an electric blower 11 am, a battery mounting portion 11 b that is connected to the main body portion 11 a, a main body portion 11 a, and a battery mounting portion. 11b, and a handle 11c having both ends connected to 11b, and a suction cylinder 11d that is connected to the joint between the main body 11a and the handle 11c and protrudes to the opposite side of the handle 11c.
Hereinafter, the left side of the drive device 11 with the suction cylinder portion 11d side forward, the handle 11c side rearward, the battery attachment portion 11b side downward, the opposite side of the battery attachment portion 11b upward, and the handle 11c facing forward. The right side will be described as the left direction and the right direction.

The main body 11a has an outer shell formed by a cylindrical housing portion having a front opening 11a ₁ , and the front opening 11a ₁ is provided with lattice-like ribs.
The upper surface of the main body portion 11a is provided with a fitting convex portion 11ax, and the upper surface of the fitting convex portion 11ax is formed with a hole portion through which the lead wire in the main body portion 11a is drawn out.
Further, the main body portion 11a, and the inner flange is provided along the edge of the front opening 11a _1, the lower portion of the inner flange has a inner flange wide section 11a ₁₁ wide.
Further, the inner collar wide portion 11a ₁₁ is engaged with a locking recess 12c ₁₁ and an engaging claw 12b _{23 of a} second locking mechanism portion 12b ₂ provided in a dust cup unit 12 to be described later. A convex portion 11a ₁₂ and an engaging concave portion 11a ₁₃ are provided. Note that the locking projection 11a ₁₂ protrudes downward, and the engagement recess 11a ₁₃ opens forward.

The battery mounting portion 11b has a concave portion that opens downward and rearward and has a terminal portion that can be electrically connected to the terminal portion of the battery 13 at the back, and the battery 13 is inserted into the concave portion from the rear side. The battery 13 can be pulled out rearward and removed from the recess. The left and right inner side surfaces of the concave portion of the battery mounting portion 11b are provided with concave grooves extending in the front-rear direction, and the left and right side surfaces of the battery 13 are provided with convex portions, and the battery 13 is attached to the battery mounting portion 11b. In this case, the left and right convex portions are configured to be fitted while sliding in the left and right concave grooves.
Further, an exhaust port 11bx for discharging the airflow that has passed through the electric blower 11am to the outside is formed on the right side surface of the casing constituting the battery mounting portion 11b (see FIG. 4).

The handle 11c is formed in a substantially U shape having an upper bending portion 11c ₁ and a lower bending portion 11c _2, and an operation portion 11e is provided outside the upper bending portion 11c ₁ .
As shown in FIGS. 3 and 4, the operation portion 11 e includes a recess 11 e ₁ provided in a resin casing constituting the upper bending portion 11 c ₁ of the handle 11 c and an elastic attached to the outside of the recess 11 e _1. a material (rubber, elastomer, etc.) and the pad portion 11e ₂ formed of, a switch unit 11e ₃ provided inside the recess 11e ₁ (housing).

In operation portion 11e, with convex rib 11e ₁₁ in the central portion of the concave portion 11e ₁ are provided, the longitudinal position of the convex rib 11e ₁₁ are formed a pair of U-shaped slit, a pair of U-shaped slit The inner region is a leaf spring portion 11e ₁₂ that can be elastically deformed. Further, a convex portion is provided on the lower surface of the pair of leaf spring portions 11e ₁₂ . Furthermore, a locking hole portion into which a pair of front and rear insertion locking pieces 11e _{24 of} a pad portion 11e ₂ described later is inserted is formed at a position before and after the pair of U-shaped slits in the recess 11e ₁ .

The pad portion 11e ₂ has recesses 11e ₂₂ and 11e _{23 at} the front and back positions of the central portion 11e ₂₁ on the upper surface side. Further, the pad portion 11e ₂ is provided with a convex portion at a position corresponding to the center portion 11e _{21 and} a corresponding position between the pair of concave portions 11e ₂₂ and 11e ₂₃ on the lower surface side, and a pair of front and rear positions of the convex portions. The insertion locking piece 11e ₂₄ is provided. The central portion 11e ₂₁ abuts on the convex rib 11e ₁₁ , and the front and rear concave portions 11e ₂₂ and 11e ₂₃ abut on the leaf spring portion 11e ₁₂ .

The switch unit 11e ₃ includes a handle 11c having a circuit board 11e ₃₁ supported and fixed by a rib structure provided in the upper curved portion 11c ₁ and a pair of front and rear switches 11e ₃₂ and 11e provided on the circuit board 11e _{31. 33} .
In the operation unit 11e, the circuit board 11e ₃₁ is configured to allow the following operation. For example, the power is turned on by pressing the front switch 11e ₃₂ or the rear switch 11e ₃₃ . After that, when the previous switch 11e ₃₂ is pressed once, it becomes the strong mode, when it is pressed twice, the mode is switched to the standard mode, and these are repeated after the third. When the switch 11e ₃₃ is pressed later with the power on, the power is turned off.

When the user presses the front or rear concave portions 11e ₂₂ and 11e ₂₃ of the pad portion 11e _{2 with} a finger during the operation by the operation portion 11e, the front or rear switches 11e ₃₂ and 11e ₃₃ are moved via the leaf spring portion 11e _12. Pressed. However, even if the user grips the pad portion 11e ₂ during cleaning, the central portion 11e ₂₁ between the front and rear concave portions 11e ₂₂ and 11e ₂₃ of the pad portion 11e ₂ protrudes and is supported by the convex rib 11e ₁₁ . Therefore, the front and rear recesses 11e ₂₂ and 11e ₂₃ are not pushed in by the palm, and erroneous operations that are not intended by the user are suppressed.

As shown in FIG. 5, the suction cylinder portion 11d and the handle 11e are configured by assembling first, second, and third members 11x, 11y, and 11z described later.
As shown in FIGS. 4 and 5, the first member 11x is a member extending in the longitudinal direction, which has a recess for accommodating the locking member 11x ₁ and the hook member 11x ₂ such a front end portion, said main body portion 11a having a fitting hole portion 11x ₃ which convex portion 11ax is fitted into the rear end portion.

The lock member 11x ₁ is attached to the first member 11x so as to be swingable around the horizontal axis, and in the assembled state, the front end portion of the lock member 11x is directed downward from the hole formed in the first member 11x. Functions as a protruding push button. The rear end portion of the locking member 11x, when the extension pipe 20 is inserted into the front opening 11d ₁ of the suction tube portion 11d, the engaging recesses 22a ₃₁ of the first connecting pipe section 22 to be described later of the extension tube 20 (see FIG. 9 (a) ~ (C) ) to function as an engagement claw 11x ₁₁ to disengageably engage. In the assembled state, a coil spring is provided between the first member 11x and the second member 11y to urge the front end of the lock member 11x downward (outside).

Hook member 11x ₂ is a member that will be described later locking recess 12a ₂₁ and detachably lock the dust cup unit 12 mounted on the cleaner body 10, lower external from the hole formed in the first member 11x Protruding to

The first member 11x is on the left side surface of the intermediate portion in the longitudinal direction, and has a connection opening 11x ₄ connected to the outlet 11y ₁₁ (to be described later) of the second member 11y, the lower surface of the rear end, the first locking mechanism 12b ₁ recess and the positioning protrusions 12c ₂₁ for accommodating a to be described later of the vacuum cleaner dust cup unit 12 mounted on the main body 10 has a recess 11x ₁₂ fits.

The second member 11y includes a front cylindrical portion 11y ₁ that communicates with the outlet 11y ₁₁ and the front opening 11d _1, an intermediate rib structure portion 11y ₂ provided continuously with the front cylindrical portion 11y _1, intermediate rib structure It has an inner handle constituting portion 11y ₃ that is connected to the portion 11y ₂ and constitutes the inner portion of the handle 11c. Further, a front end portion on the lower surface side of the front cylinder portion 11y ₁ is provided with a pair of female terminal portions 11y _{12 that} are electrically connected to a pair of lead wires (not shown) drawn from the main body portion 11a, and an inner handle. The switch unit 11e ₃ of the operation portion 11e is housed in the curved middle portion of the component portion 11y ₃ .

The third member 11z, the a member that covers the intermediate rib structure 11y ₂ and the inner grip configuration 11y _3, the intermediate portion pad portion 11e ₂ of the operation portion 11e is provided.
In addition, a connecting portion 11b ₁ that is connected to the rear ends of the second and third members 11y and 11z is provided at the rear portion of the battery mounting portion 11b. The connecting portion 11b ₁ includes a fixed protruding portion 11b ₁₁ and a presser portion 11b ₁₂ that is swingably provided on the fixed protruding portion 11b ₁₁ . The presser part 11b ₁₂ is operated when the battery 13 is removed.

First to third members 11x, 11y, when explaining an example of assembling the 11z, firstly fitting the fitting hole portion 11x ₃ of the first member 11x in the fitting convex portion 11ax of the main body portion 11a.
Then, electrically connecting a pair of lead wires (not shown) drawn out from the main body portion 11a to the pair of female terminal portions 11y ₁₂ of the second member 11y, the pair of female terminal portions 11y ₁₂ second member 11y After attaching to the front end of the second member 11y, the second member 11y is overlaid on the first member 11x. Thus, the outlet 11y ₁₁ of the second member 11y is connected to the connection port 11x ₄ of the first member 11x, the rear end portion of the second member 11y abuts the anchoring projections 11b ₁₁ of the connecting portion 11b ₁ .

The first and second members 11x superimposed sets the 11y to ultrasonic welder, the left and right edges 11xe of the front end portion of the first member 11x and the left and right edges of the front cylindrical portion 11y ₁ of the second member 11y 11ye is ultrasonically welded. In addition, the code | symbol 11w in FIG. 2 has shown the welding part. In this way, by ultrasonically welding a part of the first member 11x and the second member 11y, a connection structure using a tapping screw is not required, so that the number of parts can be reduced and the weight can be reduced. The first and second members 11x and 11y are made of, for example, ABS resin.

Then, after swinging the pressing portion 11b ₁₂ of the connecting portion 11b ₁ to the second member 11y side, superposed third member 11z to the second member 11y. Accordingly, the presser portion 11b ₁₂ is pressed by the rear end portion of the third member 11z.
By connecting the third member 11z and the second member 11y at tapping screw N, the second and third members 11y, the rear end portion of the 11z connected to the connecting portion 11b _1, the handle 11c and the suction tube Part 11d is formed.

As shown in FIG. 6A, the cleaner body 10 includes a support member 11f that supports the cleaner body 10 so that the cleaning can be interrupted and the vacuum cleaner 1 can be placed on the floor F. Is provided at the front end of the battery mounting portion 11b. As a material of the support member 11f, for example, hard rubber is used.
The support member 11f is formed in a curved shape in which the lower end portion protrudes slightly forward as viewed from the side surface side, and the lower end surface is formed in an arc shape as viewed from the front side.

  Since a space is provided below the extension tube 20 of the vacuum cleaner 1 in the state of FIG. 6A, there is a risk of damage if 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 in an arc shape, when a force is applied from directly above the extension pipe 20, the balance is lost and the body falls down as shown in FIG. 6B. Therefore, damage to the extension pipe 20 is prevented. When the cleaning is interrupted, the vacuum cleaner 1 may not be placed on the floor F, but the support member 11f may be hung on the table top or the chair back so that the vacuum cleaner 1 is drowned. it can.

FIG. 7 is an exploded view of the drive device in the electric vacuum cleaner of Embodiment 1, FIG. 8A is a left side view of the drive device, and FIG. 7B is a left side view of the cleaner main body. 9A is a cross-sectional view taken along the line II in FIG. AA, and FIG. 9B is a cross-sectional view taken along the line II in FIG.
Hereinafter, the components of the drive device 11 will be further described with reference to FIGS.
First, the main body 11a of the drive device 11 includes a pair of left and right electric blower covers 11ac ₁ and 11ac ₂ that house the electric blower 11am.
With the front end portion of the electric blower cover 11ac ₁ left the front opening 11a ₁ of the main body portion 11a is integrally formed, on top of each electric blower cover 11ac _1, 11ac ₂ wherein fitting projection 11ax halves 11ax ₁ of is integrally formed. The locking projection 11a ₁₂ is attached to the front opening 11a ₁ .
Further, in the main body portion 11a, a pair of anti-vibration rubber 11ac ₃ for fixing the rear end portion of the electric blower 11am pair of left and right electric blower cover 11ac _1, 11ac _2, the front end portion of the electric blower 11am front A packing 11ac ₄ disposed between the inner surface of the outer peripheral portion of the opening 11a ₁ is provided.

Next, the battery mounting portion 11b of the driving device 11 includes a pair of left and right battery mounting portion casings 11bc ₁ and 11bc ₂ connected to the lower portion of the main body portion 11a by screws (not shown).
The exhaust port 11bx is formed on the side surface of the right battery mounting unit casing 11bc ₂ , and the support member 11f is formed at the front end and the rear end of each battery mounting unit casing 11bc ₁ , 11bc _2. the pair of half portions 11bc ₄ of the pair of halves 11bc ₃ and the anchoring projections 11b ₁₁ serving as a core material are integrally formed. When assembling the pair of left and right battery mounting portion casings 11bc ₁ and 11bc ₂ , the presser portion 11b ₁₂ is swingably attached to the pair of half portions 11bc ₄ and the pair of half portions after assembly. 11bc ₃ wherein the support member 11f is attached so as to cover over. At this time, the support member 11f may be made of rubber and covered. Moreover, you may affix with an adhesive agent.

Further, each of the battery mounting portion casings 11bc ₁ and 11bc ₂ has a partition plate 11bc ₅ provided continuously from the front end portion to the rear end portion thereof, and left and right side surfaces of the battery 13 at the lower end portions of the side walls thereof. The lower end side wall portion 11bc ₆ is formed continuously to form a concave groove that supports the convex portion 13b to be slidable in the front-rear direction.
In the battery mounting portion 11b, there is a circuit board 11bc ₇ having a terminal portion 11bc ₈ that can be electrically connected to the terminal portion 13a of the battery 13.

The handle 11c and the suction cylinder portion 11d of the drive device 11 include the first, second, and third members 11x, 11y, and 11z.
In the first member 11x, an LED board 11xs having a plurality of LED lights that are turned on when the electric vacuum cleaner 1 is operated and when the suction force is strong is provided.
Further, the first member 11x, with the packing 11xp is attached to the outlet port (not shown) connects the outlet 11y ₁₁ of the second member 11y, the locking member 11x ₁ and the hook member 11x ₂ is attached to the front end .
Further, in the recess 11x ₁₂ provided behind the outlet of the suction tube portion 11d, preventing member 11x ₅ forget filter attachment is pivotally attached to the axis Q about a longitudinal direction (FIG. 4, FIG. 9 (See (A)). This filter attachment forgetting prevention member 11x ₅ (hereinafter sometimes referred to as “forgetting attachment prevention member 11x ₅ ”) tries to attach the dust cup unit 12 in which the filter portion 12c is not incorporated to the main body portion 11a of the drive device 11. Also has a function to prevent it from being worn. This will be described in detail later.

[Dust cup unit]
10A and 10B are dust cups in the electric vacuum cleaner according to the first embodiment. FIG. 10A is a perspective view, and FIG. 10B is an exploded view. Moreover, FIG. 11 is a dust cup in the electric vacuum cleaner of Embodiment 1, (A) is a front view, (B) is a II arrow sectional view of (A), (C) is (A). II-II arrow sectional drawing is shown. Moreover, FIG. 12 is a dust cup unit, (A) is a lower plane sectional view, (B) is a side sectional view.

Dust cup unit 12 includes a bottom 12a _1, and the dust collecting container 12a of a cylindrical shape having an outer peripheral portion 12a ₂ and the opening 12a _3, and the cup portion 12b to be fitted into the opening 12a ₃ of the dust container 12a, the cup portion 12b The filter part 12c accommodated in the inside so that attachment or detachment is possible, and the inner cylinder part 12d attached so that attachment or detachment to the cup part 12b so that it may be accommodated in the dust collecting container 12a is provided.

《Dust collection container》
Dust container 12a is viewed from the front, the engagement recess 12a ₂₁ together with the provided at the bottom 12a ₁ side of the center line P in the outer peripheral portion 12a _2, the opening 12a ₃ on the center line P in the outer peripheral portion 12a ₂ A locking projection 12a ₂₂ is provided on the side. Further, the dust collecting container 12a is provided with an inlet 12a ₂₃ for introducing air containing dust at a position shifted from the center line P in the outer peripheral portion 12a ₂ when viewed from the front.

Further, as shown in FIGS. 12A and 12B, the dust collecting container 12a is provided with a quadrangular pyramid-shaped convex portion 12a _{4 at} a position shifted outward from the center position in the bottom portion 12a ₁ . The convex portion 12a ₄ prevents dust accumulated in the lower space in the dust collecting container 12a (a space between the dust collecting container 12a and a small-diameter cylindrical portion 12d ₂₁ described later of the inner cylindrical portion 12d) from being swirled by the swirling airflow. It has a function to stop.

《Cup part》
Cup portion 12b has a central hole and a bottom portion having a reverse tapered surface around its an outer peripheral portion of the continuously provided by the cylindrical bottom, the first locking mechanism 12b ₁ and the second locking mechanism provided on an outer peripheral portion Part 12b ₂ , a pair of arc-shaped grooves 12b ₃ provided around the center hole in the bottom lower surface, packing 12b ₄ provided in the vicinity of the bottom part in the outer peripheral part, and an opening end on the opposite side to the bottom part in the outer peripheral part And a notch 12b ₅ provided in the.
Further, the cup portion 12b includes a detecting convex portion 12b ₆ provided on the lateral position of the cutout portion 12b ₅ in the outer circumferential surface. Details of the function of the detection convex portion 12b ₆ will be described later.

The first lock mechanism portion 12b ₁ includes an inverted U-shaped rib provided on the outer peripheral surface of the cup portion 12b, a swing piece 12b ₁₁ attached to the rib so as to swing about a horizontal axis, and a swing and provided at the lower end piece 12b ₁₁ engagement claw 12b ₁₂ for engagement projections 12a ₂₂ and detachably locking the dust collecting container 12a, the engaging claws 12b ₁₂ on the locking projections 12a ₂₂ And a coil spring 12b ₁₃ that is urged in the direction to be moved.

The second lock mechanism portion 12b ₂ includes a convex rib provided on the outer peripheral surface of the cup portion 12b, a slide member 12b ₂₁ attached to the rib so as to be slidable in the vertical direction, and an upper end portion of the slide member 12b _21. and the engaging claw 12b ₂₂ to the engaging recess 11a ₁₃ disengageably engaging the cleaner body 10 is provided, biases to engage the engaging claw 12b ₂₂ the engagement recess 11a ₁₃ and a coil spring 12b _23.
Further, the second lock mechanism portion 12b ₂ includes the locking recess portion 12c ₁₁ provided in the filter portion 12c described later as a constituent element.

<Filter section>
Filter unit 12c includes a pleated filter body 12c ₁ having an outer peripheral frame portion of the annular, and a packing portion 12c ₂ that covers the outer periphery of the outer peripheral frame portion of the filter main body 12c _1. Then, together with the locking recess 12c ₁₁ which opens radially inward on the inner periphery surface of the outer peripheral frame portion of the filter main body 12c ₁ are provided, the positioning protrusion 12c ₂₁ is provided on an outer peripheral surface of a packing unit 12c ₂ .

The engagement recess 12c ₁₁ and the positioning protrusions 12c ₂₁ are arranged in a generally opposite positions to each other.
When fitting the filter portion 12c to the opening of the cup portion 12b, for positioning plunge the positioning protrusion 12c ₂₁ of the filter portion 12c to the cutout portion 12b ₅ of the cup portion 12b. Then, the engagement recess 12c ₁₁ of the filter unit 12c is disposed in the second position of the locking mechanism portion 12b ₂ of the cup portion 12b. Further, the packing portion 12c ₂ is supported in close contact with a step portion provided on the inner peripheral surface of the opening of the cup portion 12b.

<Inner cylinder>
The inner cylindrical portion 12d has a cylindrical filter unit 12d ₁ removably attached to the cup portion 12b, and the partitioning member 12d ₂ of tubular detachably mounted a cylindrical filter unit 12d _1.
The cylindrical filter 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 the outer peripheral portion of the cylindrical frame body 12d ₁₁ .
Tubular frame 12d ₁₁ includes a pair of arcuate grooves 12b ₃ and the pair of engaging pieces 12d ₁₁₁ to detachably lock the provided by the cup portion 12b at its outer peripheral portion upper end, is provided on the outer peripheral portion lower end And a pair of arcuate grooves 12d _{231 (} to be described later) of the partition member 12d ₂ and a pair of locking pieces 12d ₁₁₂ that are detachably locked.

Partitioning member 12d ₂ includes a small-diameter cylindrical portion 12d _21, a large-diameter cylindrical portion 12d _22, and a flange portion 12d ₂₃ which connects the inner peripheral surface of an upper end of the small diameter cylinder portion 12d ₂₁ large-diameter portion 12d ₂₂ Have.
The flange portion 12d ₂₃ has a pair of arcuate grooves 12d ₂₃₁ provided on the upper surface thereof and detachably engaged with a pair of locking pieces 12d _{112 at} the lower end of the cylindrical filter portion 12d ₁ .

As shown in FIGS. 12A and 12B, the large-diameter cylindrical portion 12d ₂₂ has an outer flange 12d ₂₂₁ at its lower end. The outer flange 12d ₂₂₁ is a plan view oval, without even the gap between the outer flange 12d ₂₂₁ and the dust collecting container 12a by an oval, forming a narrow gap S ₁ is wider gap S ₂ To do. Accordingly, the dust accumulated in the bottom of the dust container 12a is whirled up by the whirling current G, it is possible to suppress the suction force reduction caused by soaring dust adheres to the cylindrical filter part 12d ₁ of the inner cylindrical portion 12d .

To be more specific, although the bottom 12a ₁ of the dust container 12a is provided with the convex portion 12a ₄ to prevent the turning of the dust, the bottom 12a of the dust collecting container 12a from the flange portion 12d ₂₃ of the partitioning member 12d _{2 1} because the distance to the short, that if there is no outer flange 12d _221, the dust hits the protrusion 12a ₄ adheres soaring the partition members 12d ₂ to cylindrical filter portion 12d ₁ of the above, the suction force is reduced is there.
In order to solve this problem, an outer flange 12d ₂₂₁ is provided at the lower end of the partition member 12d ₂ so that dust does not easily rise upward.

However, if the gap between the outer peripheral surface of the outer flange 12d ₂₂₁ and the inner peripheral surface of the dust collecting container 12a is too small, the sucked large dust will not enter below the outer flange 12d ₂₂₁ . Therefore, in the present invention, the narrow gaps S ₁ are formed in places where the dust hitting the convex portions 12a ₄ is likely to rise, and the wide gaps S ₂ are formed in places where dust is difficult to rise. Thus, the outer flange 12d ₂₂₁ has an oval shape so that large dust can fall. In the case of this embodiment, the major axis D ₁ of the outer flange 12d ₂₂₁ is set to 61 mm, the minor axis 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. is not.
Incidentally, the convex portion 12a _4, since is provided in only one location, nature, is narrow enough clearance S ₁ in one place. In the case of this embodiment, the partition member 12d ₂ and the cylindrical filter portion 12d ₁ are detachable and have a structure that is locked by an arc-shaped groove and a locking piece, and this locking structure is opposite to 180 degrees. Since it has a locking mechanism that can be locked even if it is rotated to the side, depending on the locking position of the partition member 12d ₂ with respect to the cylindrical filter portion 12d _{1, one} narrow gap S ₁ is arranged at a position where dust can easily rise. In some cases, the narrow gap S ₁ is also provided on the opposite side of 180 degrees. In other words, regardless of which side of the partition member 12d ₂ is locked 180 degrees with respect to the tubular filter portion 12d ₁ , the position of the narrow gap S ₁ with respect to the convex portion 12a ₄ is the same, that is, a pair The outer flange 12d ₂₂₁ is formed in an elliptical shape so that _one of the narrow gaps S1 is always at a position where dust is likely to rise.

In the assembled state of the dust cup unit 12, small-diameter cylindrical portion 12d ₂₁ of the partitioning member 12d _2, together fits into the positioning cylindrical portion 12a ₂₄ provided on the inner bottom surface of the dust container 12a, around the positioning tube portion 12a ₂₄ It abuts against the provided packing 12a ₂₅ . In this state, in the dust container 12a, space lumps dust accumulates below the large-diameter portion 12d ₂₂ of the partitioning member 12d ₂ are formed.

[Removal of the dust cup unit from the drive unit]
As shown in FIG. 9 (A) and (B), said mounting forgetting prevention member 11x ₅ of the drive unit 11 is provided rotatably suction tube portion 11d in the axial center Q about a longitudinal direction. Prevention member 11x ₅ This mounting forgotten, in a state where the dust cup unit 12 to drive 11 is not mounted (FIG. 9 (A)), the first contact portion 11x ₅₁ projecting from the suction tube portion 11d downward outside and and a second contact portion 11x ₅₂ housed in the suction cylindrical portion 11d.

When attaching the dust cup unit 12 (with the filter portion 12c) to the cleaner body 10, first, the locking recess 12a ₂₁ of the dust cup unit 12 is formed with the dust cup unit 12 tilted with respect to the suction cylinder portion 11d. hooked on the hook member 11x ₂ of the cleaner body 10. By going to a parallel to the suction tube portion 11d of the dust cup unit 12 as a fulcrum hook member 11x _2, the locking projections of the cleaner body 10 in the engagement recess 12c ₁₁ of the dust cup unit 12 11a ₁₂ is locked, and the engaging claw 12b ₂₂ of the second lock mechanism 12b ₂ of the dust cup unit 12 is engaged with the engaging recess 11a ₁₃ of the driving device 11, and the mounting is completed.

At this time, as shown in FIGS. 9A and 9B, the positioning convex portion 12c ₂₁ of the filter portion 12c abuts on the first abutting portion 11x ₅₁ of the forgetting-to-wear preventing member 11x ₅ to contact the first abutting portion 11x ₅₁ will push into the recess 11x ₁₂ a, thereby rotating the preventing member 11x ₅ forgotten mounted, also projects to rotate while lower external second contact portion 11x _52. However, the first contact portion 11x ₅₁ is by being pushed to the back of the recess 11x _12, second contact portion 11x ₅₂ is accommodated in the recess 11x ₁₂ again while approaching toward the preventing member 11x ₅ forget attached . During this time, the detection protrusion 12b ₆ of the dust cup unit 12 is also moved towards the recess 11x _12, the detection protrusion 12b ₆ is accommodated in the recess 11x ₁₂ while avoiding the second contact portion 11x _52.

When removing the dust cup unit 12 from the cleaner body 10, inclined dust cup unit 12 with respect to the suction tube portion 11d as a fulcrum hook member 11x ₂ in a state of depressing the second locking mechanism 12b ₂ of the slide member 12b21 It can be removed easily.

Next, a case where a dust cup unit in which the filter portion 12c is not incorporated in the cup portion 12b is attached to the driving device 11 will be described with reference to FIGS.
For example, when the user tries to mount the left dust cup unit forgot to incorporate a filter unit 12c in the cup portion 12b to the driving device 11, the preventing member forgets mounting positioning protrusion 12c ₂₁ of the filter portion 12c are as 11x the first contact portion 11x _{51 5} can not be pushed first contact portion 11x ₅₁ abuts in the recess 11x _12, cutout portions 12b ₅ of the cup portion 12b (see FIG. 10 (B)) is It approaches the first contact portion 11x _51. Then, the detection protrusion 12b ₆ of the cup portion 12b is to shoehorn second contact portion 11x ₅₂ into the recess 11x ₁₂ in contact with the second contact portion 11x ₅₂ preventing member 11x ₅ forgotten mounted.

At this time, the detection protrusion 12b ₆ is an attempt is made to rotate the second contact portion 11x ₅₂ to the first contact portion 11x ₅₁ side opposite, second contact portion 11x ₅₂ may constitute a recess 11x ₁₂ Rotation is prevented by hitting the side wall. Thereby, since the cup part 12b cannot approach the suction cylinder part 11d any more, the engaging claw 12b ₂₂ of the second lock mechanism part 12b ₂ of the dust cup unit is engaged with the engaging concave part 11a ₁₃ of the drive device 11. Thus, the dust cup unit (without the filter portion 12c) cannot be mounted on the driving device 11.

  Thereby, the user can notice that the filter part is not incorporated in the dust cup unit. That is, according to the vacuum cleaner of the present invention, the user is reminded of forgetting to attach the filter and encourages the use of the correct vacuum cleaner, and the vacuum cleaner is driven without the filter portion, and the dust is sucked in. It is possible to prevent a problem that the drive device fails.

<About the structure of the extension pipe>
FIG. 13: is an extension pipe | tube in the vacuum cleaner of Embodiment 1, Comprising: (A) is a front view, (B) is a side view, (C) is II sectional view taken on the line of (A). 14 is an exploded view of the extension pipe of FIG. 13A, and FIG. 15 is an explanation showing the internal structure of the extension pipe of FIG. 13A viewed from the front side of the first and second connecting pipe portions. FIG. 16 is a cross-sectional view of the tube main body in the extension pipe of FIG. 13A, and FIG. 17 is a diagram for explaining the laminated structure of the pipe main body in the extension pipe of FIG.

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

[Tube body]
The tube main body 21 is formed by stacking a plurality of cylindrical carbon fiber layers 21a, and has a pipe shape (main body pipe 21). In the case of the first embodiment, the plurality of laminated cylindrical carbon fiber layers 21a include 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. They are laminated in order. Note that the outer peripheral surface of the third cylindrical carbon fiber layer 21a ₃ resin coating layer 21b is laminated as the outermost layer. And it processes as dry carbon. Dry carbon is formed in a pressurizable kiln using a pressure-resistant device capable of making the inside high pressure.

The first cylindrical carbon fiber layer 21a ₁ is formed of a one-way 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 made of a bi-directional carbon fiber sheet having a plurality of carbon fiber warps and wefts.
As the unidirectional carbon fiber sheet and the bi-directional carbon fiber sheet, a commercially available prepreg sheet in which a resin is impregnated in advance between carbon fibers can be used. Note that the plurality of carbon fibers can be configured in a crossed yarn shape in an oblique direction other than warp and weft. Further, combinations of crossed ones, warps and wefts may be freely recombined.

The pipe body 21 can be manufactured by forming and laminating the first to third cylindrical carbon fiber layers 21a _{1 to} 21a ₃ by a known method using a mold one by one using a commercially available prepreg sheet. . For example, there is a method of winding around a shaft bar such as a metal bar.
In the case of the first embodiment, small notch 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 both end portions of the tube main body 21 after formation. It is formed.

In the tube body 21, the thickness T ₁ of the first cylindrical carbon fiber layer 21a ₁ is about 0.1 mm, and the thicknesses T ₂ and T ₃ of the second and first cylindrical carbon fiber layers 21a ₁ are about 0.00 mm, respectively. The thickness T ₄ of the resin coating layer 21b is about 0.1 mm, and the overall thickness T ₅ is about 0.8 mm. Incidentally, the first to third cylindrical thickness of the carbon fiber layer 21a ₁ ～21A ₃ is derived from one direction and the second direction carbon fiber sheet having a thickness used during their formation.

Each cylindrical carbon fiber layer 21a has both end portions extending in the longitudinal direction of the tube, and has end surface abutting portions 21ax in which the end surfaces of the both end portions are in contact with each other. The end surface abutting portions 21ax are portions where the end surfaces of both end portions of the one-way and two-way carbon fiber sheets used at the time of forming each cylindrical carbon fiber layer 21a are fused.
In the pipe body 21, the end surface abutting portion 21ax of one cylindrical carbon fiber layer 21a and the end surface abutting portion 21ax of another cylindrical carbon fiber layer 21a adjacent to each other are disposed at positions that do not overlap each other. In the case of the first embodiment, each contact end surface portion 21ax is disposed at a position shifted by a central angle of 120 °. Thus, by uniformly shifting the position of each contact end surface portion 21ax in the circumferential direction, it is possible to make the tube main body uniform without making a rigid strength portion.

Since each cylindrical carbon fiber layer 21a has an end face abutting portion 21ax, each cylindrical carbon fiber layer 21a is formed as a layer having a uniform thickness without a step. In other words, when the carbon fiber sheet is simply triple wrapped around the metal rod at the time of manufacturing the tube body, it is between the single winding end portion and the double winding start end portion and between the double winding end portion and the triple winding start end. Although step between the parts occurs, for three layers of the first embodiment of the tube body 21 in the first to third cylindrical carbon fiber layer 21a ₁ ～21A ₃ is a separate layer, such a step does not occur . Therefore, the tube body 21 is formed with a uniform thickness and has a uniform rigidity as a whole.

[First connecting pipe section]
The 1st connection pipe part 22 is a part connected with the cleaner body 10, and has the connection pipe main body 22a, the small piece 22b, and the (1st) cover member 22c.
The connecting tube main body 22a is inserted into one end of the tube main body 21 and fixed with an adhesive (first) fixing portion 22a _1, and a pair of males described later of the conductive unit 24 connected to the fixing portion 22a _1. holding the mold pin portion 24a ₂ (first) terminal holding portion 22a _2, and an insertion portion 22a ₃ which are provided continuously to the terminal holding portion 22a ₂ is inserted into the front opening 11d ₁ of the cleaner body 10 Have.

The fixing portion 22a ₁ has a pair of receiving pieces 22a ₁₁ for receiving one end portion of a support plate 24b, which will be described later, of the conductive unit 24 on the inner peripheral surface, and a positioning projection that engages with one notch portion 21n of the tube body 21. The portion 22a ₁₂ is provided at the boundary with the terminal holding portion 22a ₂ on the outer peripheral surface.
The terminal holding portion 22a ₂ has a concave portion on the positioning convex portion 22a ₁₂ side on the outer peripheral surface thereof, and the pair of male terminal portions 24a ₂ and the lead wire 24a ₁ of the conductive unit 24 are inserted into the concave portion from the inside to the outside. A (first) drawer port 22a ₂₁ is formed.

Further, a rib structure 22a ₂₂ for holding the pair of male terminal portions 24a ₂ in parallel with each other at a predetermined interval and a boss portion 22a ₂₃ into which a tapping screw 22d for attaching the cover member 22c is screwed into the recess of the terminal holding portion 22a _2. And are provided.
The insertion portion 22a ₃ is the positioning convex portions 22a ₁₂ side of the outer peripheral surface, with the locking member engaging recesses 22a ₃₁ to the engaging claw 11x ₁₁ disengageably engage the 11x ₁ of the cleaner body 10.

Pieces 22b is a member that covers the outlet 22a ₂₁ of the connecting tube body 22a in which a pair of lead wires 24a ₁ has been inserted, dust in the air passing through the extension tube 20 during use of the vacuum cleaner 1 is outlet 22a It functions so as not to flow into the male terminal portion 24a ₂ side from ₂₁ and protects the male terminal portion 24a ₂ .
The cover member 22c covers the recess of the terminal holding portion 22a ₂ of the connection pipe main body 22a by screwing the tapping screw 22d to the boss 22a _23, and fixed to the connection pipe main body 22a by pressing a small piece 22b.

[Second connecting pipe section]
The second connecting pipe portion 23 is a portion connected to the suction port body 40, and includes a connecting pipe main body 23a, a small piece 23b, a lock member 23c, a coil spring 23d, and a (second) cover member 23e. .
The connecting pipe main body 23a is inserted into the other end of the pipe main body 21 and fixed with an adhesive (second) fixing portion 23a _1, and a pair of conductive units 24 described later connected to the fixing portion 23a ₁ . And a (second) terminal holding portion 23a ₂ for holding the female terminal portion 24a ₃ .

The fixing portion 23a ₁ has a pair of receiving pieces (not shown) for receiving the other end portion of the support plate 24b of the conductive unit 24 on the inner peripheral surface, and is positioned to engage with the other notch portion 21n of the tube main body 21. and a convex portion 23a ₁₂ at the boundary between the terminal holding portion 23a ₂ on the outer peripheral surface.
The terminal holding portion 23a ₂ has a concave portion on the positioning convex portion 23a ₁₂ side on the outer peripheral surface thereof, and the pair of female terminal portions 24a ₃ and the lead wire 24a ₁ of the conductive unit 24 are inserted into the concave portion from the inside to the outside. A (second) drawer port 23a ₂₁ is formed. Further, a rib structure 23a ₂₂ that holds the pair of female terminal portions 24a ₃ parallel to each other at a predetermined interval and a boss portion 23a ₂₃ into which a tapping screw 22f for attaching the cover member 23e is screwed into the recess of the terminal holding portion 23a _2. And are provided.

The lock member 23c has a shaft portion 23c _1, and a button portion 23c ₂ and the locking claw portion 23c ₃ provided continuously so as to sandwich the shaft portion 23c _1, mounted in a recess in the terminal holding portion 23a ₂ ing. In this case, the shaft portion 23c ₁ is rotatably attached to the rib structure 23a _22. Further, the locking pawl 23c ₃ is capable protruded connection tube body 23a from the hole formed in the bottom surface of the recess of the connection pipe main body 23a.
Coil spring 23d is provided a locking member 23c of the button portion 23c ₂ in the recess of the connection pipe main body 23a so as to bias outwardly.

Pieces 23b is a member that covers the outlet 23a ₂₁ of the connecting tube body 23a in which a pair of lead wires 24a ₁ has been inserted, dust in the air passing through the extension tube 20 during use of the vacuum cleaner 1 is outlet 23a It functions so as not to flow from ₂₁ to the female terminal portion 24a ₃ side, and protects the female terminal portion 24a ₃ .
The cover member 23e has a hole 23e ₁ to expose the button portion 23c ₂ of the lock member 23c to the outside. The cover member 23e covers the recess of the terminal holding portion 23a ₂ of the connection pipe main body 23a by screwing the tapping screw 22f to the boss portion 23a _23, with pressing the pieces 23b fixed to the connecting pipe body 23a, the lock member 23c To prevent it from falling off.

[Conductive unit]
18A and 18B are conductive units in the extension pipe of FIG. 13A, where FIG. 18A is a front view, FIG. 18B is a side view, and FIG. FIG. 19 is an exploded view of the conductive unit of FIG. 20A is a cross-sectional view taken along the line II in FIG. 18A, FIG. 20B is a cross-sectional view taken along the line II-II in FIG. 18A, and FIG. ) Is a cross-sectional view taken along line III-III. FIG. 21 is a view showing lead wires in the cover plate in the conductive unit of FIG. 18A, and FIG. 22 is a cross-sectional view of the first connecting pipe portion in the extension pipe of FIG. 20A and 20C are cross-sectional views at the position of a protruding piece 24c ₂ described later.

The conductive unit 24 includes a pair of conductive cables 24a and a long and thin hollow plate 24x that houses the pair of conductive cables 24a.
The hollow plate 24x includes a support plate 24b and a cover plate 24c that are accommodated so as to sandwich the pair of conductive cables 24a. These are integrated by ultrasonic welding when the conductive unit 24 is assembled. In addition, you may integrate with an adhesive agent.
The pair of conductive cables 24a and the support plate 24b have a longer length than the tube body 21, the pair of conductive cables 24a have a longer length than the support plate 24b, and the support plate 24b is longer than the cover plate 24c. It has a length.

Each conductive cable 24a includes a lead wire 24a ₁ covered with an insulating tube, a pin-shaped male terminal portion 24a ₂ electrically connected to both ends of the lead wire 24a ₁ , and a clip-shaped female die. and a 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 portions 24a of the extension tube 20 ₂ is electrically connected is inserted into the female terminal portion 11y ₁₂ of the cleaner body 10 , described later male terminal portion 42a of the suction port body 40 to the female terminal portion 24a ₃ of the extension tube 20 (see FIG. 23) is plugged in electrically connecting.

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 upper end portions on both side surfaces of the base portion 24b _1. (For example, ABS resin).
The bottom of the base portion 24b ₁ of the supporting plate 24b to receive a cover plate 24c is flat.

The cover plate 24c has a base portion 24c ₁ having a substantially m-shaped cross-sectional shape, and protruding pieces 24c ₂ provided on the outer surfaces at both ends of the base portion 24c ₁ , and is made of an insulating resin (for example, ABS). Resin). The pair of protruding pieces 24c _{2 at} both ends serve as a wall that blocks foreign substances such as dust from entering between the pair of protruding pieces 24c ₂ .
The base portion 24c ₁ has a pair of groove portions 24c ₁₁ that are provided along the longitudinal direction at the center portion in the width direction and individually store the pair of conductive cables 24a.

Further, the cross-sectional shape of the outer surface of the base portion 24c ₁ 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.
Incidentally, the cross-sectional shape of the pair of the hooking piece 24b ₂ the outer surface of the support plate 24b has a circular arc shape of the protruding pieces 24c ₂ of the cover plate 24c a continuous arcuate portion 24b _21, and a flat surface portion 24b ₂₂ Have.

In addition, the base portion 24c ₁ has a pair of hemispherical ribs 24c ₃ that prevent misalignment by sandwiching the lead wires 24a ₁ housed in the respective groove portions 24c ₁₁ between the both end portions 24ce and the intermediate portion 24cc of the pair of groove portions 24c _11. Are provided. The hemispherical ribs 24c ₃ may not be a pair but may be at one place, and may be alternately arranged at equal intervals.
Further, on both sides of each groove 24c ₁₁ in the base portion 24c ₁ pair of protrusions 24c ₄ along the longitudinal direction is provided.

Conductive unit 24 housed each conductive cable 24a in the respective grooves 24c ₁₁ of the cover plate 24c, then covered with a support plate 24b in the groove 24c ₁₁ side, of the supporting plate 24b in contact with each other inner surface of the cover plate 24c a pair of protrusions 24c ₄ for ultrasonic welding.
Note that an adhesive may be used instead of ultrasonic welding.
In the assembled conductive unit 24, the support plate 24b is longer than the cover plate 24c, and each conductive cable 24a is longer than the support plate 24b. Therefore, a part of both ends of each conductive cable 24a is supported by the support plate 24b. While exposed to the outside.
The conductive cable 24a is a pair of conductive cables, but is not limited thereto. For example, one conductive cable may be used. In this case, one cable may be constituted by passing two conductive cables in one cable. In this case, the cable is passed through one of the two grooves 24c ₁₁ (see FIG. 20).

<Assembling the extension tube>
Next, an example of assembly of the extension pipe 20 will be described.
First, after inserting the conductive unit 24 to the pipe main body 21, a pair of male terminal portions 24a ₂ and a pair of female terminal portions 24a ₃ of the conductive unit 24 first connecting tube portion 22 and the second connecting pipe section 23.

The pair of male terminal portions 24a ₂ are inserted into the connecting tube main body 22a of the first connecting tube portion 22 and pulled out from the pull-out port 22a ₂₁ to be fixed to the rib structure 22a ₂₂ . A pair of male terminal portions 24a ₂ which is fixed to the rib structure 22a ₂₂ protrudes from the rib structure 22a ₂₂ to the longitudinal direction of the tube. In this case, placing a hooking piece 24b ₂ of the pair of one end side of the support plate 24b of the conductive unit 24 on a pair of receiving pieces 22a ₁₁ of the connection pipe main body 22a.

It should be noted that the pipe main body 21, the first and second connection pipe sections 22 in the conductive unit 24, so that the conductive unit 24 can be along the inner surfaces of the pipe main body 21, the first and second connection pipe sections 22, 23. the inner surface and the facing portions of 23, i.e., the outer surface of the pair of the hooking piece 24b ₂ the outer surface and the cover plate 24c of the support plate 24b is formed in an arc surface shape.

Next, the attachment pieces 22b and the cover member 22c to the connection pipe main body 22a, inserted and fixed into one end of the connecting tube body 22a of the fixed portion 22a ₁ of via an adhesive tube body 21. At this time, the positioning convex portion 22a ₁₂ of the first connecting pipe portion 22 is engaged with the notch portion 21n of the pipe main body 21 for positioning.

The pair of female terminal portions 24a ₃ are inserted into the connection tube main body 23a of the second connection tube portion 23, and are drawn out from the extraction port 23a ₂₁ to be fixed to the rib structure 23a ₂₂ . A pair of male terminal portion 24a that is fixed to the rib structure 22a _{22 2} communicates with a pair of holes provided in the rib structure 22a _22. At this time, the pair of hook pieces 24b ₂ on the other end side of the support plate 24b of the conductive unit 24 are placed on the pair of receiving pieces 22a ₁₁ (see FIG. 22) of the connection pipe body 23a. Thereby, since the both ends of the conductive unit 24 are supported by the first and second connecting pipe portions 22 and 23, the conductive unit 24 can maintain a raised posture even if not supported in the tube main body 21. . Since the conductive unit 24 can be supported in the pipe main body 21 only on both sides of the first and second connecting pipe portions 22 and 23, the pipe main body 21 is not particularly required to be manufactured at low cost. Assembling workability is also improved. In addition, the support plate 24b is formed in a U shape with a shallow cross section, and the cover plate 24c is formed in a W shape so that the conductive unit 24 is not warped away from the inner surface of the tube body 21 due to warpage. Each has a rib in the longitudinal direction.

Next, the attachment pieces 23b and the cover member 23e to connect tube body 23a, inserted and fixed in the other end portion of the connection pipe main body 23a of the fixed portion 23a ₁ of via an adhesive tube body 21. At this time, the positioning convex portion 23a ₁₂ of the second connection pipe portion 23 is engaged with the notch portion 21n of the pipe main body 21 for positioning.
Thereby, the assembly of the extension pipe 20 is completed.

<About suction port>
FIG. 23 is a bottom view showing the suction port body in the electric vacuum cleaner of Embodiment 1, and FIG. 24 is a side view of the suction port body shown in FIG. 25 is a cross-sectional view taken along the arrow II 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.
As shown in FIGS. 23 to 26, the suction port body 40 includes a bottom plate portion 41 a, a top plate portion 41 b that faces the bottom plate portion 41 a, and a front side that is provided in front of and behind the traveling direction (arrow X direction in FIG. 23). A plate portion 41c and a rear plate portion 41d, and a left plate portion 41e and a right plate portion 41f provided on the left and right of the traveling direction of the top plate portion 41b are provided.

  As shown in FIG. 23, the suction port body 40 includes a suction port 41 provided in the bottom plate portion 41a and extending in the left-right direction (arrow A1 direction), and a connection connected to the rear of the suction port 41 via a connection shaft portion 42x. A pipe portion 42, a rotary brush 43 provided rotatably around an axial center extending in the left-right direction at the suction port 41, a suction flow path 16 (FIG. 25) connecting the suction port 41 and the connection pipe portion 42, A rotating brush motor 44 (FIG. 26) for driving the rotating brush 43, a brush cover member 80 covering the left end portion of the rotating brush 43 in FIG. 23, a lifting detection switch 47 and a wheel 54 provided on the bottom plate portion 41a. Prepare.

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

  Accordingly, when the start switch of the operation unit 11e (FIG. 1) is turned on and the floor cleaning operation is started, the dust on the floor is swept by the rotary brush 43 driven by the rotary brush motor 44, and the suction is performed. From the mouth 41, it is conveyed toward the dust cup unit 12 (FIG. 1) through the suction channel 16 and the connecting pipe.

  The lifting detection switch 47 includes a swing lever portion having wheels, a switch body that supports the swing lever portion so as to be swingable, and a torsion coil spring that biases the swing lever portion downward. Is connected to the motor drive circuit board for the rotating brush housed in the bottom plate portion 41a, and the wheel of the swing lever portion is exposed outwardly from the bottom plate portion 41a.

  When the suction port body 40 is lifted away from the floor surface, the lifting detection switch 47 is operated to forcibly stop the driving of the rotary brush motor 44.

A pair of lead wires electrically connected to the rotary brush motor 44 and the lifting detection switch 47 are provided inside the suction port body 40, and the pair of lead wires are pin-shaped provided on the pipe portion 42. Are electrically connected to the pair of male terminal portions 42a.
A locking recess 42 b is provided at the tip of the pipe portion 42.

The suction port body 40 configured in this manner is detachably connected to the second connection pipe portion 23 of the extension pipe 20. At this time, the pair of male terminal portion 42b of the suction port body 40 is inserted into the pair of female terminal portions 24a ₃ of the extension tube 20 is electrically connected to the engagement recess 42b of the suction port body 40 the lock member 23c engaging claw portion 23c ₃ of the extension tube 20 is disengageably locking (Fig. 1, see FIGS. 13 and 14).

(Embodiment 2)
In the first embodiment, the extension pipe 20 in which the first and second connection pipe sections 22 and 23 are provided at both ends of the pipe body 21 is illustrated, but the first and second connection pipe sections 22 and 23 are omitted. Also good. In this case, the male terminal portion and the female terminal portion at both ends of the conductive unit 24 are configured to be fixed to both ends in the tube body.

(Embodiment 3)
Although the extension tube of the stick type vacuum cleaner has been described in the first embodiment, the extension tube of the present invention can also be applied to a canister type vacuum cleaner.

(Summary)
The extension pipe of the vacuum cleaner of the present invention comprises a pipe body and a conductive unit provided so as to be inserted through the pipe body,
The conductive unit includes a conductive cable and a hollow plate that houses the conductive cable.

The extension pipe of the electric vacuum cleaner of the present invention may be configured as follows, or may be appropriately combined.
(1) The hollow plate may include a support plate and a cover plate that cover the conductive cable so as to sandwich the conductive cable.
According to this configuration, the assembly of the conductive unit is facilitated.

(2) The conductive cable and the support plate have a longer length than the tube body, the conductive cable has a longer length than the support plate, and the support plate has a longer length than the cover plate. You may have.
According to this structure, it becomes a structure which is easy to provide the connection part connected to the suction port body with a built-in motor and a rotating brush, and a cleaner main body in the both ends of a pipe | tube main body.

(3) The support plate may include a base portion having a concave cross-sectional shape and a pair of hook pieces provided along upper end portions on both side surfaces of the base portion.
According to this configuration, if a pair of receiving pieces are provided in the pipe main body or in the connecting portion at both ends of the pipe main body, the pair of hooking pieces at both ends of the conductive unit are hooked and held on the pair of receiving pieces. Can do.

(4) The support plate has a flat bottom portion for receiving the cover plate in the base portion,
The cover plate may have an arcuate outer cross-sectional shape.
According to this configuration, the conductive unit can be arranged along the inner surface of the cylindrical tube body, and a wide space through which the airflow in the tube body passes can be secured.

(5) The cover plate may include a groove portion that is provided along the longitudinal direction in the center portion in the width direction and that individually stores the conductive cables.
According to this configuration, each conductive cable can be individually protected within each groove, and the insulation between the conductive cables can be enhanced.

(6) The cover plate may be provided with hemispherical ribs that sandwich the conductive cable housed in the groove portion and prevent positional displacement at both ends and an intermediate portion of the groove portion.
According to this configuration, it is possible to prevent wobbling in each groove portion of each conductive cable and scratches due to the wobbling, and thus it is possible to improve the protection performance in each groove portion of each conductive cable.

  The disclosed embodiments should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention can be used as an extension tube of a vacuum cleaner such as a stick type or a canister type.

1 Vacuum cleaner 20 Extension pipe 21 Pipe body 24 Conductive unit (conductive part)
24a Conductive cable 24b Support plate 24b ₁ Base part 24b ₂ Hook 24c Cover plate 24c ₁₁ Groove 24c ₃ Hemispherical rib 24x Hollow plate

Claims (7)

A pipe body, and a conductive unit provided so as to be inserted through the pipe body,
The conductive unit is an extension tube of a vacuum cleaner having a conductive cable and a hollow plate that houses the conductive cable.   The extension pipe of the vacuum cleaner according to claim 1, wherein the hollow plate includes a support plate and a cover plate that cover the conductive cable so as to sandwich the conductive cable.   The conductive cable and the support plate have a longer length than the tube body, the conductive cable has a longer length than the support plate, and the support plate has a longer length than the cover plate. The extension pipe of the vacuum cleaner according to claim 2.   The vacuum cleaner according to claim 2 or 3, wherein the support plate includes a base portion having a concave cross-sectional shape and a pair of hook pieces provided along upper end portions on both side surfaces of the base portion. Extension tube. The support plate has a flat bottom portion for receiving the cover plate in the base portion,
The extension pipe of the vacuum cleaner according to claim 4, wherein the cover plate has an outer surface having a circular cross-sectional shape.   The said cover plate is an extension pipe | tube of the vacuum cleaner as described in any one of Claims 2-4 which has a groove part which is provided along the longitudinal direction in the center part of the width direction, and accommodates the said electrically conductive cable separately.   The vacuum cleaner according to claim 6, wherein the cover plate is provided with hemispherical ribs at both ends and an intermediate portion of the groove so as to prevent the displacement by sandwiching the conductive cable housed in the groove. Extension tube.

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