TWI678179B - Suction body of electric vacuum cleaner - Google Patents

Abstract

An object of the present invention is to provide a suction nozzle body of an electric vacuum cleaner which can open the cover sheet when moving forward, close the cover sheet when moving backward, and ensure the tightness with the floor, and can increase the pressure of the suction flow path when moving backward. The solution for the suction mouth body of the electric vacuum cleaner of the present invention includes: a suction mouth cover (110) having a suction mouth (111) below, and a movable cover piece (120) provided in front of the suction mouth (111); and a movable cover piece (120) ) Includes: a contact rotation part (123) that rotates when the mouthpiece cover (110) contacts the floor surface (M) during forward and backward movement, and forms a gap (S1) between the suction cover and the floor surface (M) during forward movement The cover sheet portion (121) of the opening formed and closing the gap (S1) when retreating; the contact rotating portion has a curvature at the beginning portion of contact with the floor surface, and has at least one hollow portion, and is in the mouthpiece cover (110) ) When retreating, the lowermost part of the cover piece (121) is located lower than the lowermost part of the mouthpiece cover (110).

Description

Suction body of electric vacuum cleaner

[0001] The present invention relates to a mouthpiece of an electric vacuum cleaner.

[0002] As the suction mouth body of an electric vacuum cleaner, there are a suction mouth body in which an opening and closing member is installed on the front side of the dust suction opening as in Patent Document 1, and a rotation body is provided in front of the dust suction mouth as in Patent Document 2. Inhale into the mouth. [Prior Art Document] [Patent Document] [0003] [Patent Document 1] Japanese Patent Laid-Open No. 2004-350763 [Patent Document 2] Japanese Patent Laid-Open No. 11-239551

[Problems Solved by the Invention] 0004 [0004] However, in the invention described in Patent Document 1, the reversing imparting member of the opening and closing member (cover sheet) uses a soft member made of cloth such as a nap cloth. For this reason, there is a possibility that the resistance is small on a plank, etc., and it is impossible to reverse (rotate). [0005] In the invention described in Patent Document 2, it is adopted to contact a rotating member that rotates a rotating body (cover sheet) with the floor surface, but the relationship between the rotating body and the floor surface is not described. In the case where the rotating body is not in contact with the floor surface, there is a concern that it is difficult to ensure the tightness. [0006] An object of the present invention is to provide a suction nozzle body of an electric vacuum cleaner, in which the cover sheet is opened when it is advanced, and the cover sheet is closed when it is retracted, so as to ensure the tightness between the cover and the floor, and Increase the pressure in the suction flow path. [0007] The present invention is characterized by comprising: a suction mouth cover having a suction mouth below; and a movable movable cover piece provided in at least one of the front-back direction of the suction mouth; and the movable cover piece is provided when the suction mouth cover is advanced And a contact rotating part that rotates in contact with the floor surface when retreating, and a cover piece part that forms an opening between the forward surface and the floor surface and closes the opening when retreating; the contact rotating part is in contact with the floor surface The starting portion has a curvature and has at least one hollow portion, and when the mouthpiece cover is retracted, the lowermost portion of the cover sheet portion is located at the same position or lower than the vicinity of the mouthpiece of the mouthpiece cover. . [Effects of the Invention]] [0008] According to the present invention, it is possible to provide a large piece of dust (dust) that is attracted by the cover sheet opening when moving forward, and to ensure the tightness with the floor by closing the cover sheet when moving backward. As a result, the suction port of the electric vacuum cleaner capable of more reliably attracting dust can be maintained at a high pressure in the suction flow path.

[0010] Hereinafter, a mode for implementing the present invention (hereinafter referred to as an “embodiment”) will be described in detail with reference to appropriate drawings. [0011] (1st Embodiment) (1) The electric vacuum cleaner to which this embodiment is applied can be used in a rod form in a state where the length of the telescopic tube is extended relative to the cleaner body, and can be used in a state where the length of the telescopic tube is shortened. Use in handheld form. [0012] In this embodiment, the above-mentioned rod-type electric vacuum cleaner and hand-held electric vacuum cleaner are taken as an example for description, and it can also be applied to the operation of the vacuum cleaner body, which is connected to the hose portion, and is provided with an operation switch SW at hand. A so-called cylindrical electric vacuum cleaner composed of a tube, a telescopically extendable extension tube, and an inlet body, or a type of electric vacuum cleaner suitable for the type composed of an electric vacuum cleaner body, an extension tube, and an inlet body. [0013] FIG. 1 is an overall perspective view of the electric vacuum cleaner 100 used in a rod form. FIG. 2 is a left side view of the electric vacuum cleaner 100 used in a handheld form. FIG. 3 is a plan view of the electric vacuum cleaner 100 shown in FIG. 2 after the suction port body 3 is removed. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3. The telescopic tube 20 in Figs. 2 and 3 is indicated by a dotted line. The directions of the front, back, up, down, and left and right of the electric vacuum cleaner 100 in the following description are based on the directions of up, down, up, down, and left and right as indicated by arrows in FIG. 1 and FIG. 2. [0014] As shown in FIG. 1 and FIG. 2, the electric vacuum cleaner 100 includes a suction mouth body 3, a cleaner body 1, a telescopic tube 20 (see FIG. 1), a first handle 30, and a lock of the telescopic tube 20. Unlock the device (not shown). [0015] ≪Suction mouthpiece≫ The Suction mouthpiece 3 is removably attached to the suction opening 15 (see FIG. 4) which is opened at the front of the cleaner body 1. [0016] The suction nozzle 3 shown in FIG. 1 is a powered brush suction nozzle 3a with a built-in motor-driven rotating brush, and the suction nozzle 3 shown in FIG. 2 is a slit nozzle 3b. The suction nozzle body 3 of the electric vacuum cleaner 100 is not limited to these powered brush suction nozzle bodies 3a or slit nozzles 3b, and other suction nozzle bodies may be used. The electric vacuum cleaner 100 can be used without the suction mouth body 3 being attached. In addition, the mouthpiece body 3 of this embodiment can be removed from the cleaner body 1 by pressing the mouthpiece body attaching and detaching button 16 provided at the front end of the cleaner body 1. The details of the mouthpiece 3 will be described later. [0017] In addition, the electric vacuum cleaner 100 shown in FIG. 1 and the electric vacuum cleaner 100 shown in FIG. 2 have different lengths of the extended telescopic tubes 20, as described above, except that the suction port body 3 is a powered brush suction port. The body 3a differs from the slit nozzle 3b in this point, and the rest have the same structure. [0018] 尘 Vacuum cleaner body≫ Vacuum cleaner body 1 is constituted by an electric blower 40 (see FIG. 4), a main body substrate 44 (see FIG. 4), and a battery 60 (see FIG. 4) described later in a housing 10 thereof. Wait. The vacuum cleaner body 1 includes a cyclone-type dust collection device 2 detachably mounted to the housing 10, and an air introduction pipe (not shown) after the dust-containing air sucked in from the suction port body 3 is sent to the dust collection device 2. ). [0019] The outer shape of the cleaner body 1 is mainly formed by the outer shape formed by the casing 10 and the dust collecting device 2, and is formed into a shape that is long in the front-rear direction. A second handle 33 is formed on the housing 10 of the cleaner body 1. [0020] <Outer Case> As shown in FIG. 1, the outer case 10 includes a case portion 13, a motor case portion 11, a battery case portion 12, and an introduction case portion 14. [0021] The tube and shell portion 13 is formed by extending from the upper portion of the cleaner body 1 in the front-rear direction. As described later, the housing portion 13 is formed with a second handle 33 at a rearward portion of the cleaner body 1. The outer shape of the shell portion 13 is formed in a convex shape extending in the front-rear direction except for the second handle 33 portion. [0022] As shown in FIG. 3 and FIG. 4, when the electric vacuum cleaner 100 is used in a handheld form as shown in FIG. 3 and FIG. 4, a telescopic tube 20 (tube member 21) described later is housed inside. When the electric vacuum cleaner 100 is used in a rod-type configuration, the tube member 21 is in a state of protruding from the rear end portion of the cleaner body 1 beyond the casing portion 13 as shown in Fig. 1. [0023] As shown in FIG. 1 and FIG. 2, the motor case portion 11 is disposed between the tube case portion 13 and the battery case portion 12 in a range of a substantially rear half of the cleaner body 1 below the tube case portion 13. . As shown in FIG. 3, the motor case portion 11 is formed wider than the tube case portion 13 in the left-right direction. [0024] As shown in FIG. 1 and FIG. 2, the battery case portion 12 is disposed on the lower side of the motor case portion 11 within a substantially rear half of the cleaner body 1. As shown in FIG. 3, the battery case portion 12 is formed wider than the tube case portion 13 in the left-right direction, and is formed narrower than the motor case portion 11 in the left-right direction. [0025] The introduction tube case portion 14 is configured to cover an air introduction tube 17 (see FIG. 5) described later from the upper side. [0026] In FIGS. 1 and 2, reference numeral 80 denotes a rotary brush. [0027] As shown in FIG. 3, the introduction tube portion 14 is disposed so as to protrude to the right of the tube portion 13 in a range of approximately the front half of the cleaner body 1. [0028] <Electric blower, main body substrate, and battery> As shown in FIG. 4, the electric blower 40 is housed in the motor case portion 11. Specifically, the electric blower 40 is supported by a screw or the like in a fixing box 11 a disposed in the motor case portion 11. [0029] The electric blower 40 includes a fan 41 and a motor 43 that drives the fan 41 around a rotating shaft 42. [0030] In the electric blower 40 according to this embodiment, the fan 41 is disposed forward, and the rotation shaft 42 is parallel to the telescopic tube 20. [0031] The electric blower 40 sucks air from the front portion facing the dust collecting device 2 side. The exhaust gas from the electric blower 40 flows backward through the fixed box 11a. [0032] The main substrates 44, 44 are control substrates for controlling the cleaner body 1, and are fixed in the fixing box 11a by screws or the like after the electric blower 40. [0033] The main substrates 44 and 44 in this embodiment are arranged vertically and separately, and electronic components are mounted on the opposing surfaces. Most of the air discharged from the electric blower 40 flows to cool the electronic components arranged on the main substrates 44 and 44 so as to face each other. Then, the exhaust gas flowing out from a specific opening (not shown) of the fixed box 11a is discharged to the outside of the vacuum cleaner through an exhaust port (not shown) formed through a plurality of slots and the like penetrating the inside and outside of the motor case portion 11. . A filter may be arranged in the exhaust port. [0034] The battery 60 is housed in the battery case 12. The battery 60 in this embodiment is formed by a rectangular parallelepiped that is flat in the vertical direction. The battery 60 is a main power source of the electric vacuum cleaner 100 and is electrically connected to the main body substrate 44 and the electric blower 40 and the like. [0035] The storage battery 60 is composed of a rechargeable secondary battery such as a lithium-ion battery, a nickel-hydrogen battery, and the like. The storage battery 60 in the present embodiment is a battery pack using a plurality of single cells, but the single cells may be used according to the use conditions of the electric vacuum cleaner 100 and the like. [0036] FIG. 5 is a bottom view of the mouthpiece. Fig. 5 shows the state when the mouthpiece body 3 is retracted. [0037] As shown in FIG. 5, the mouthpiece body 3 includes a mouthpiece cover 110 and a movable cover sheet 120. [0038] The system of the suction mouth cover 110 viewed from the bottom surface is substantially rectangular (horizontal length), and has a generally rectangular suction mouth 111 as shown by a thick dotted line in FIG. 5. That is, the suction mouth cover 110 has a suction mouth 111 (an area surrounded by a thick dotted line in FIG. 5) on the bottom surface of the suction mouth cover 110. [0039] In addition, the suction mouth cover 110 is provided with detachable cover members 112 and 113 on the left and right sides of the suction mouth 111. The cover member 112 is a rod-fixed type, and the cover member 113 is a screw-fixed type. [0040] The cover member 112 is provided with a roller 112r that supports the suction port cover 110 on the floor surface. The cover member 113 is provided with a roller 113r that supports the mouthpiece cover 110 on the floor surface. [0041] The movable cover sheet 120 has a long shape extending in the left-right direction, and is provided at the front end of the suction mouth cover 110. The movable cover piece 120 extends to the positions of the cover members 112 and 113 on the left and right. [0042] In addition, the mouthpiece body 3 includes a first rotary cleaning body 130 and a second rotary cleaning body 140. The first rotary cleaning body 130 is disposed behind the movable cover sheet 120 in the suction port 111. The second rotary cleaning body 140 is disposed behind the suction port 111. [0043] The first rotary cleaning body 130 is formed by planting bristles around the core member provided at the center of the shaft. In addition, the rotary brush 130 has a brush portion extending from the cover member 112 to the cover member 113 and arranged. [0044] The second rotary cleaning body 140 is circular in cross section, and is arranged in parallel with the first rotary cleaning body 130. The second rotary cleaning body 140 is formed slightly longer in the axial direction than the first rotary cleaning body 130. In addition, the second rotary cleaning body 140 and the first rotary cleaning body 130 are arranged to face each other in the front-rear direction. Here, a pipe body 30e is fixed around the shaft portion 30a of the second rotary cleaning body 30, and a bristle body (fluffing cloth) 30b is planted on the outer peripheral surface of this pipe body 30e.回转 The rotational driving force of the second rotary cleaning body 30 is the frictional force between the bristle body 30b and the floor surface M, and the rotary braking force of the second rotary cleaning body 30 is the frictional force between the bristle body 30b and the protrusion 35a. The microfibers constituting the bristle body 30b are inclined in a circumferential direction relative to the tube body 30e, and the direction of the inclination is at a position where the bristle body 30b is in contact with the floor surface, and is directed from the front of the inhaler 6 to the rear. Therefore, when the suction device 6 is advanced, the frictional force between the bristle body 30b and the floor surface M, that is, the rotation driving force of the second rotary cleaning body 30 is reduced, and the frictional force between the bristle body 30b and the protrusion 35a, that is, the second rotary cleaning body 30 is reduced. The turning braking force is increased, and the turning of the second turning cleaning body 30 is regulated. Conversely, when the suction device 6 is moved backward, the frictional driving force between the bristle body 30b and the floor surface M, that is, the rotation driving force of the second rotary cleaning body 30 is increased, and the frictional force between the bristle body 30b and the protrusion 35a is that of the second rotary cleaning body 30. The turning braking force becomes small, and the second turning cleaning body 30 turns. [0045] In this embodiment, when the suction device 6 is advanced, the rotation of the second rotating cleaning body 30 is substantially locked, but it is not necessarily locked. If the suction device 6 is advanced, the first 2 If the turning of the swiveling cleaning body 30 is slower than when it is free, the dust that is sucked into the suction chamber Q2 by the first turning cleaning body 20 can be prevented from being swept behind the suction body 11. [0046] In this embodiment, the case where the bristle bodies 30b are uniformly arranged in the entire circumferential direction of the tube body 30e is used as an example, but it is not limited to this. The same as the first rotary cleaning body 20, it may be The bristle body 30b is arranged in a spiral shape with respect to the axial direction of the shaft portion 30a. [0047] Furthermore, it is preferable that the hue of one end and the other end of the first rotary cleaning body 20 be different from each other (for example, one end side is green and the other end side is blue), and the second The hue of one end of the swept cleaning body 30 and the other end corresponds to the color of one end of the first swept cleaning body 20 and the other end (one end side is green, and the other end side is blue). Accordingly, when the second rotating cleaning body 30 is removed and reassembled, the direction of the reverse hair direction of the bristle body 30b can be prevented from being reversed. [0048] FIG. 6 is a perspective view showing a movable cover sheet. [0049] As shown in FIG. 6, the movable cover sheet 120 is structured to include a cover sheet portion 121 and contact and rotation portions 122 and 123. [0050] The cover piece portion 121 includes a cover piece 121a extending in the axial direction (left-right direction), and a shaft portion 121b that rotatably operates the cover piece 121a. In addition, the cover sheet portion 121 is formed of a soft member, for example, to prevent damage to the floor surface. [0051] As the soft member, it can be appropriately selected from synthetic rubbers such as elastomers, vinyl chloride, natural rubber, vinyl rubber, silicone rubber, and urethane rubber. In addition, as the cover sheet portion 121, as long as the airtightness of the suction port 111 can be ensured, the cover piece portion 121 is not limited to a soft member, and may be a hard member. It can be selected from synthetic resins such as ABS (acrylonitrile-butadiene-styrene), PP (polypropylene), and POM (polyacetal). [0052] The shaft portion 121b includes a metal shaft 121c made of stainless steel, iron, or the like, and a covering portion 121d that is in close contact with the periphery of the shaft 121c. The shaft portion 121b has a coating portion 121d formed of the same resin as the cover piece portion 121, and is formed by insert molding in which the shaft 121c is disposed inside. [0053] As described above, when the cover member 121 and the cover portion 121d use a soft member, there is a risk of being deformed. However, by passing the shaft 121c inside the cover portion 121d, the cover portion 121 can be secured. rigidity. In addition, when the cover piece portion 121 is formed of a hard member and the rigidity of the cover piece portion 121 is ensured, the shaft 121c need not be used, and the configuration can be simplified. [0054] In addition, the axial portion (left-right direction) of the central covering portion 121d of the shaft portion 121b is removed to form an exposed portion 121e where the shaft 121c is exposed. In addition, shaft end portions 121f and 121g on the left and right ends of the shaft 121c protrude from the left and right sides of the covering portion 121d. [0055] The contact rotation parts 122 and 123 are formed at both left and right ends of the shaft part 121b. Specifically, both left and right ends of the covering portion 121d are integrally formed with the cover sheet portion 121. That is, the contact rotation parts 122 and 123 are formed integrally with the cover sheet part 121. [0056] The cover sheet portion 121 and the contact rotation portions 122 and 123 may be integrally formed as described above, but may be formed separately. [0057] FIG. 7 is a side view showing the contact rotation portion. [0058] As shown in FIG. 7, the contact rotation part 122 is composed of a hollow approximately fan-shaped (or triangular) front contact rotation part 122f, a rear contact rotation part 122g, and a hollow part 122c provided therebetween. The front contact rotation portion 122f includes a contact portion 122a and a front surface portion 122d, and a curved surface portion (contact start portion) 122h is provided between the front surface portion 122d and the contact portion 122a. The rear contact rotation portion 122g includes a contact portion 122b and a rear surface portion 122e, and a curved surface portion 122i (contact start portion) is provided between the contact portion 122b and the rear surface portion 122e. That is, the corner portions (curved portions 122h, 122i) which come into contact with the floor surface when the movable cover sheet is rotated, respectively, have at least a curvature of R1 or more. The angle formed by the front surface portion 122d of the contact portion 122a and the rear surface portion 122e of the contact portion 122b is set to approximately 90 °. The contact rotation part 123 has the same structure, and includes a contact part 123a, a contact part 123b, a hollow part 123c, a front part 123d, a rear part 123e, a front contact rotation part 123f, a rear contact rotation part 123g, and a curved surface part 123h. , 122i. Each of the front contact rotation portion 122f (123f) and the rear contact rotation portion 122g (122g) includes hollow portions C and D. [0059] FIG. 8 is a front view showing a movable cover sheet. FIG. 8 shows a state when the vehicle is retracted from the front. [0060] As shown in FIG. 8, the movable cover piece 120 is provided with contact and rotation portions 122 and 123 at both left and right ends of the cover piece portion 121. When the mouthpiece body 3 (see FIG. 5) is retracted, the cover piece 121 (the cover piece 121a) faces downward. [0061] In addition, the movable cover sheet 120 contacts the front end portions 122s and 123s of the arc portion of the rotating portions 122 and 123 so as to protrude below the lowermost portion 121s of the cover sheet portion 121. Thereby, the movable cover sheet 120 can be rotated with the contact rotating parts 122 and 123 as a starting point. [0062] FIG. 9 is a vertical cross-sectional view showing the mouthpiece body during forward movement. In addition, FIG. 9 shows a state when the mouthpiece body 3 is placed on the floor surface M (assuming flooring). In FIG. 9, a portion shown by a thick dotted line indicates a suction flow path (the same is true for FIG. 12). [0063] As shown in FIG. 9, the movable cover sheet 120 is disposed in front of the rotary brush 130. In addition, the end portions 121f and 121g (see FIG. 6) of the left and right ends of the shaft 121c of the movable cover sheet 120 are rotatably supported by the mouthpiece cover 110. [0064] In addition, the movable cover 120 has a shaft 121c exposed from the exposed portion 121e rotatably held by the holding portion 102 formed in the mouthpiece cover 110. This can prevent the long movable cover piece 120 from falling off during operation. [0065] The holding portion 102 has a shape in which a notch portion 102a is formed on the bottom of a member having a substantially U-shaped cross section. By providing this notch portion 102a, the shaft 121c can be attached and detached. [0066] When the suction nozzle body 3 moves forward, the contact rotating portion 123 rotates in the counterclockwise direction with the shaft 121c as the center due to the frictional force when the contact rotating portion 123 is in contact with the floor surface M. When the contact rotation part 123 is rotated, the cover sheet part 121 is also rotated in the counterclockwise direction at the same time. The cover piece portion 121 is rotated to an angle where the cover piece portion 121 is in contact with the rotary brush 130. Thereby, a gap S1 (an opening is formed) is formed between the cover sheet portion 121 and the floor surface M, and a large amount of dust (dust) can be attracted from the front of the suction mouth body 3. [0067] FIG. 10 is a sectional view taken along the line XI-XI in FIG. 9. FIG. 10 shows a state in which the front is viewed from the inside of the mouthpiece cover 110. [0068] As shown in FIG. 10, the movable cover sheet 120 advances through the mouthpiece body 3, and rotates using the frictional resistance of the contact rotation parts 122, 123 on the left and right sides and the floor surface M. Thereby, a wide gap S1 is formed between the contact rotation portion 122 and the contact rotation portion 123. [0069] FIG. 11 is a side view of the contact rotation part 123 when the mouthpiece body is advanced. The shape of the previous contact rotation portion 123f when in contact with the floor surface is indicated by a thick line. When moving forward, the contact portion 123a is in contact with the floor surface M, but the front contact rotation portion 123f is hollow and provided with a hollow portion C. Therefore, while the front portion 123d is largely deflected toward the rear, the front contact rotation portion 123f itself also faces The rear (hollow portion 123c) side is deflected. Due to the effect of the two deflections, the load applied to the contact rotating portion due to friction with the floor surface M will not be concentrated and can be dispersed (escape), the friction of the contact rotating portion 123 can be suppressed, and tearing and the like can be prevented. It is broken, and the force required for the front and back operation of the suction body is reduced. In addition, since the curved surface portion 123h, which is the contact start portion with the floor surface M, has a curvature, the floor surface M can be prevented from being damaged. [0070] In addition, when operating on a floor surface with small resistance such as slabs, the deflection is small, but when operating on a floor surface with high resistance such as a carpet with long hair, it will be greatly deflected, so it is not related to the operation. The above-mentioned effect can be obtained on the floor surface of the season. [0071] FIG. 12 is a vertical cross-sectional view showing the mouthpiece body when retracted. [0072] As shown in FIG. 12, when the suction nozzle body 3 moves backward, due to the frictional force when the contact rotating portion 123 contacts the floor surface M, the contact rotating portion 123 rotates around the shaft 121c as the clock direction. When the contact rotation portion 123 makes the rotation, the cover sheet portion 121 also rotates in the clock direction at the same time. Thereby, the cover sheet portion 121 closes the front end of the suction mouth cover 110, thereby ensuring the tightness with the floor surface M, and compared with advancing the suction mouth body 3, the interior of the brush room that houses the rotating brush 130 can be closed. The pressure increases and dust can be sucked in more reliably. In addition, when the mouthpiece body 3 is retracted, the front end portion of the mouthpiece cover 110 is closed by the cover sheet portion 121, so that dust can be prevented from penetrating to the front of the mouthpiece body 3. [0073] Also, as shown in the enlarged view of FIG. 12, when the suction mouth body 3 is retracted, the cover sheet portion 121 is oriented downward. At this time, the cover sheet portion 121 is inclined toward the front side at an angle θ with respect to the vertical direction. In addition, in Fig. 12, the description is exaggerated for the sake of convenience. [0074] By tilting the orientation of the cover sheet portion 121 in this way, when the suction mouth body 3 is retracted, the cover sheet portion 121 and the floor surface M can be reduced compared with the case where the cover sheet portion 121 is directed downward. Friction resistance can improve the operability of the suction body 3. [0075] FIG. 13 is a sectional view taken along the line XIII-XIII of FIG. 12. [0076] As shown in FIG. 13, when the mouthpiece body 3 is retracted, the cover piece 121 is oriented downward, and the front end portion of the mouthpiece cover 110 is closed. At this time, the lowermost portion 121s of the cover piece portion 121 is located on the lower side (the floor surface M side) than the lowermost portions 112a and 113a (near the suction port 111) of the suction mouth cover 110. [0077] A gap S2 is formed between the lowermost portion 121s of the cover sheet portion 121 and the floor surface M. This gap S2 is set to 1 mm to 2 mm, for example. That is, the lowermost portion 121s is located on the upper side (the side farther away from the floor surface M) than the front end portions (lower ends) 122s, 123s before contacting the rotating portions 122, 123. Thereby, as described above, the cover sheet portion 121 can be stably rotated starting from the contact rotation portions 122 and 123. [0078] In addition, the shaft 121c (see FIG. 12) not only the left and right ends of the mouthpiece cover 110, but also the center portion in the left-right direction is also held by the holding portion 102, so that the cover sheet portion 121 can be stably rotated. [0079] FIG. 14 is a side view of the contact rotation part 123 when the suction body is retracted. The shape of the contact rotation part 123g after contact with the floor surface is indicated by a thick line. When moving backward, the contact portion 123b is in contact with the floor surface M, but the rear contact rotating portion 123g is hollow and is provided with a hollow portion D. Therefore, after the rear contact rotating portion 123g is greatly deflected forward, The rear contact rotation portion 123g itself is also bent toward the front (hollow portion 123c) side. With the effect of the two deflections, due to the friction with the floor surface M, the load applied to the contact rotating portion, that is, the curved surface portion 123i, will not be concentrated and can be dispersed (escape), and the friction of the contact rotating portion 123 can be suppressed and prevented. Damages such as tearing, etc., and reduce the force required for the front and back operation of the mouthpiece. In addition, since a curvature is provided at the beginning of the contact with the floor surface M, the floor surface M can be prevented from being damaged. In addition, when operating on a floor surface with a small resistance such as planking, the deflection is small, but when operating on a floor surface with a large resistance, such as a long-haired carpet, it will be greatly deflected. Therefore, the floor surface during operation is not relevant. , Can obtain the above effects. [0080] In terms of structure, the front cover 123d abuts the mouthpiece cover by the front contact rotating portion 123f, so that the rotation of the movable cover sheet 120 is regulated, and the movable cover sheet 120 does not excessively fall forward or face the reverse side. (Rear) dump. [0081] FIG. 15 is a bottom view showing a state in which the cover member is removed from the suction port body, and FIG. 16 is a bottom view showing a state in which the movable cover sheet is further removed from the state in FIG. 15. [0082] As shown in FIG. 15, the mouthpiece body 3 of the present embodiment has cover members 112 and 113 attached to the bottom surfaces of the left and right ends of the mouthpiece cover 110 detachably. The cover member 112 can be removed by operating a pull rod (not shown). The cover member 113 is fixed to the mouthpiece cover 110 via a screw 116 (see FIG. 5). FIG. 15 shows a state in which the cover member 113 is removed for convenience of explanation. [0083] By removing the cover member 112, the shaft end portion 121g of the shaft 121c of the movable cover piece 120 is exposed. The shaft end portion 121g is rotatably held on a bearing 104 provided on the lower surface of the suction mouth cover 110. In the structure, the bearing 104 is formed with a notch portion having a diameter smaller than that of the shaft 121c, and the shaft end portion 121g of the shaft 121c can be attached to and detached from the bearing 104. [0084] By removing the cover member 112, the shaft portion 130a of the first rotary cleaning body 130 and the shaft portion 140a of the second rotary cleaning body 140 are exposed. Thereby, the first rotary cleaning body 130 and the second rotary cleaning body 140 can be detached from the suction cover 110. [0085] When the cover member 113 is removed from the suction port cover 110, a bearing 103 is formed to hold the shaft end portion 121f of the shaft 121c of the movable cover sheet 120. The bearing 103 has a hole shape supported by being inserted through a shaft end portion 121f of the shaft 121c. [0086] When the movable cover sheet 120 is removed from the mouthpiece cover 110, only the cover member 112 may be removed in a state where the cover member 113 is attached to the mouthpiece cover 110, that is, by The cover member 112 is removed, and the shaft end portion 121g of the shaft 121c is exposed. Therefore, the shaft end portion 121g can be removed from the bearing 104, and the center portion of the shaft 121c can be removed from the holding portion 102. Then, by sliding the movable cover sheet 120 to the right, the movable cover sheet 120 can be removed from the suction cover 110. The state in which the movable cover sheet 120 is removed from the suction case cover 110 is shown in FIG. 15. [0087] In the state shown in FIG. 16, when the movable cover sheet 120 is mounted on the suction mouth cover 110, the shaft end portion of the shaft 121c is mounted with the cover member 113 mounted on the suction mouth cover 110. 121f slides from right to left and is inserted into and held in the bearing 103. Then, the shaft 121c of the exposed portion 121e (see FIG. 6) is fitted and held on the holding portion 102. Thereafter, the shaft end portion 121g of the shaft 121c is fitted and held in the bearing 103. [0088] With such a structure, by removing one of the cover members 112 from the suction port cover 110, the movable cover sheet 120 can be removed from the suction port cover 110, and the movable cover sheet 120 can be mounted on the suction port. Since the cover 110 is easy to attach and detach the movable cover sheet 120. [0089] As described above, the mouthpiece body 3 according to the first embodiment includes the mouthpiece cover 110 having the mouthpiece 111 below, and the movable cover 120 provided in front of the mouthpiece 111. The movable cover sheet 120 includes contact rotating parts 122 and 123 that rotate while contacting the floor surface M when the suction mouth cover 110 advances and retracts, and an opening (gap S1) is formed between the suction cover 110 and the floor surface during forward and backward. The cover sheet portion 121 of the opening (gap S1) is closed. When the mouthpiece cover 110 is retracted, the lowermost portion 121s of the cover sheet portion 121 is positioned lower than the lowermost portions 112a and 113a (near the mouthpiece 111) of the mouthpiece cover 110. According to this, when the mouthpiece body 3 is advanced, the front opening can attract a large amount of dust (dust), and when the mouthpiece body 3 is retracted, the front opening is closed to ensure the tightness with the floor surface M, and when the mouthpiece body 3 is advanced. In contrast, the pressure in the suction port 111 can be increased. As a result, garbage (dust) can be sucked in reliably. [0090] In the first embodiment, the mouthpiece cover 110 includes a cover member 112 that can be detachably attached, and the shaft end portion 121g (the end portion of the shaft 121c) of the movable cover piece 120 is located on the body side of the mouthpiece cover 110 and the cover. Between the cover members 112. Accordingly, a wide suction width W of the garbage (dust) can be ensured (see FIG. 5). In addition, by providing the cover member 112, the support shaft 121c can be prevented from falling off. [0091] The contact rotating parts 122 and 123 are formed of a soft member. Accordingly, the cover sheet portion 121 can be stably rotated without damaging the floor surface M such as a paving surface. That is, the operation of forming the opening (gap S1) when the mouthpiece body 3 is advanced and the operation of closing the opening (gap S1) when the mouthpiece body 3 is retracted can be smoothly performed. [0092] In the first embodiment, the contact rotation parts 122 and 123 are described as examples, but the contact rotation parts 125, 127, and 129 shown in FIGS. 17 and 18 and 19 may be used. FIG. 17 is a perspective view showing a modified example of the contact rotating portion, and FIG. 18 is a side view of the contact rotating portion when the suction body is advanced. 18 and 19 are perspective views showing other modified examples of the contact rotating portion. [0093] As shown in FIG. 17, in the movable cover piece 120A, a contact rotation portion 125 is provided instead of the contact rotation portion 122 of the first embodiment. The contact rotation part 125 is configured by a tongue part 125a protruding outward in the radial direction, and a tongue part 125b and the tongue part 125c protruding outward in the radial direction at different positions from the tongue part 125a. In order to reduce the rigidity of the portion in contact with the floor surface, the tongue portion 125a disperses the resistance (escape) received from the floor surface, and the tongue portion 125a is bent at 90 ° so that the length of the tongue portion takes the shape of the maximum length. [0094] In addition, when the tongue portion 125a and the tongue portion 125c are in contact with the floor surface, in order to prevent the hair from being caught on the carpet or the like, the front end thereof is shaped to be bent toward the axis center. [0095] The hollow portion is provided by the gap of the tongue portion 125a, the tongue portion 125b, the tongue portion 125c, and the flexion of the tongue portion 125a. The tongue portion 125a and the tongue portion 125c that are in contact with the floor surface can be greatly deflected, and can be obtained with the aforementioned The same effect is obtained by contacting the rotating portions 122 and 123. In addition, the tongue part 125a is in contact with the floor surface when the suction body is advanced, and the tongue part 125c is in contact with the floor surface when it is retracted. The tongue 125b is provided for the purpose of assisting the contact of the rotating part 125 with the floor when switching between forward and backward. In the case where the movable cover piece can be smoothly rotated by the portion 125a and the tongue portion 125c, the tongue portion 125b may be omitted. Conversely, for the purpose of smoothly moving the movable cover piece 120A, a plurality of tongue portions 125b may be provided, the front end may be flexed, the wall thickness may be increased, the spherical shape may be formed, and the triangular shape may be used (e.g., the Noire triangle). ) And other shapes that are more accessible to the floor. [0096] As shown in FIG. 18, the movable cover piece 120B is provided with a contact rotation portion 127 instead of the contact rotation portion 122 of the first embodiment. The contact rotating portion 127 is configured by a tongue portion 127a protruding radially outward, and a tongue portion 127b and a tongue portion 127c protruding radially outward at different positions from the tongue portion 127a. [0097] Since the gap between the tongue portion 127a, the tongue portion 127b, and the tongue portion 127c becomes a hollow portion, the tongue portion 127a and the tongue portion 127c that are in contact with the floor surface can be greatly deflected, and the same effect can be obtained. In addition, when the mouthpiece body is advanced, the tongue portion 127b adjacent to the tongue portion 127a and the tongue portion 127c is also set in a dimensional relationship with the floor surface M, so that the resistance from the floor surface can be prevented from being concentrated on the tongue portion 127a and the tongue portion. 127c is provided for the purpose of assisting the contact rotation part 127 with the floor when the forward and backward switching is performed. In the case where the movable cover piece can be rotated smoothly only with the tongue portion 127a and the tongue portion 127c and there is no problem in abrasion or strength, the tongue portion 127b can be omitted or the number can be appropriately changed. In addition, the tongue portions 127a, 127b, and 127c can flex the front end for the purpose of reducing friction and preventing damage to the floor surface M, can increase the wall thickness, can be spherical, and can be triangular (e.g., Noire triangle) Shapes that make it easier to contact the floor surface. [0098] As shown in FIG. 19, the movable cover piece 120A is provided with a contact rotation portion 129 instead of the contact rotation portion 122 of the first embodiment. In order to receive the resistance from the floor to cause the movable cover sheet 120A to rotate, this contact rotating part 129 is a contact part 129a in a hollow shape that contacts the floor surface M and adjusts the deflection of the contact part 129a when it is operated forward and backward It is constituted by the reinforcing rib 129b. In FIG. 19, the shape is shown in which one reinforcing rib 129b is provided at the center toward the outer side of the circumference, but it is not limited to this. It can ensure the deflection of the contact portion 129a when the mouthpiece is operated forward and backward and reduce the resistance from the floor The shape can be freely determined within the range of wear of the contact part and no damage such as tearing. [0099] (Second Embodiment) FIG. 20 is a cross-sectional view showing a movable cover piece provided on a mouthpiece body according to a second embodiment. FIG. 20 shows a state when the mouthpiece body 3 is retracted. The same configurations as those in the first embodiment are denoted by the same reference numerals, and redundant descriptions are omitted. [0100] As shown in FIG. 20, the movable cover sheet 120C of the second embodiment is formed by forming a recess 121f on the cover sheet portion 121. The recessed portions 121f are formed at a plurality of locations in the axial direction (left-right direction, width direction). In addition, the recessed portion 121f is configured such that the recessed surface faces downward when retracting. The uppermost portion 121t of the recessed portion 121f is located lower than the lowermost portions 112a and 113a (near the suction port 111) of the suction mouth cover 110. [0101] In the second embodiment, the movable cover piece 120C has a recessed portion 121f. When the suction port cover 110 is retracted, the uppermost portion 121t of the recessed portion 121f is lower than the lowermost 112a, 113a (suction port 111) shown by the dotted line of the suction port cover 110. Near) is more on the lower side. According to this, as in the first embodiment, the suction mouth body 3 is opened at the front when the suction body 3 is advanced, and a large amount of dust (dust) can be attracted. In addition, when the mouthpiece body 3 is closed by being closed by the front opening, the tightness with the floor surface M is ensured, and the pressure inside the mouthpiece 111 can be increased compared to when it is advanced. As a result, garbage (dust) can be reliably inhaled. [0102] (Third Embodiment) Fig. 21 is a cross-sectional view showing a movable cover piece provided on a mouthpiece of a third embodiment. Fig. 21 shows the state when the mouthpiece body 3 is retracted. [0103] As shown in FIG. 21, the movable cover sheet 120D of the third embodiment has the lowermost part 121s of the cover sheet part 121 and the lowermost parts 112a and 113a of the mouthpiece cover 110 (the same as the lowermost parts 112a and 113a Same side). In the case of the third embodiment configured as described above, the same effects as those of the first and second embodiments can be obtained. [0104] As mentioned above, the embodiments of the present invention have been described, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the scope of the present invention. For example, in the above-mentioned embodiment, the case where two contact rotation parts 122 and 123 are provided is described as an example, but it is not limited to two, and may be one (for example, one in the axial center part) It may be three or more. By setting one contact rotation part, the opening width in front of the suction port 111 can be kept wide, and dust from the front can be easily sucked in. [0105] In the above-mentioned embodiment, the case where the movable cover sheet 120 is mounted in front of the first rotary cleaning body is taken as an example for description, but instead of rotating the brush 130 behind the rotating brush 130, a movable brush 140 is disposed. The cover sheet 120 may be used. In this case, when the mouthpiece body is retracted, the movable cover sheet 120 is opened to take in dust, and when the movable cover sheet 120 is moved forward, the movable cover sheet 120 is closed to establish airtightness. In addition, the movable cover sheet 120 can be installed before and after the first rotary cleaning body 130. [0106] In the second embodiment, the case where the recessed portion 121f is formed in the cover sheet portion 121 will be described as an example. Instead of the recessed portion 121f, a slot-shaped notch may be formed. In this case as well, when the suction mouth cover 110 is retracted, the uppermost part of the notch is located at the same position as the vicinity of the suction mouth 111 of the suction mouth cover 110 or at a lower position.

[0107]

3‧‧‧ Suction body

110‧‧‧ Suction cover

111‧‧‧ Suction mouth

112‧‧‧ Cover member

112a, 113a‧‧‧ bottom

120, 120A, 120B, 120C, 120D‧‧‧movable cover

121‧‧‧ Cover Film Department

121f‧‧‧ Recess

121s‧‧‧lowest

121t‧‧‧upper

122, 123, 125, 127, 129‧‧‧ contact the rotating part

S1‧‧‧Gap (opening)

[0009] Fig. 1 is an overall perspective view of an electric vacuum cleaner used in a rod type. Figure 2 is a left side view of the electric vacuum cleaner used in a handheld form. Figure 3 is a plan view of the electric vacuum cleaner shown in Figure 2 after the suction port body is removed. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3. Figure 5 is a bottom view of the mouthpiece. Figure 6 is a perspective view showing a movable cover sheet. Figure 7 is a side view showing the contact rotating portion. Figure 8 is a front view showing the movable cover sheet. FIG. 9 is a vertical cross-sectional view showing the mouthpiece body in the forward direction. Figure 10 is a sectional view taken along line XI-XI in Figure 9. Figure 11 is a side view of the contact rotating part when the suction body is advanced. FIG. 12 is a longitudinal sectional view showing the mouthpiece body when retracted. Figure 13 is a sectional view taken along the line XIII-XIII in Figure 12. Figure 14 is a side view of the contact rotating part when the suction mouth body is retracted. FIG. 15 is a bottom view showing a state where the cover member is removed from the suction port body. FIG. 16 is a bottom view showing a state where the movable cover sheet is further removed from the state of FIG. 15. FIG. 17 is a perspective view showing a modified example of the contact rotating portion. FIG. 18 is a perspective view showing another modified example of the contact rotating portion. FIG. 19 is a perspective view showing another modified example of the contact rotating portion. Fig. 20 is a cross-sectional view showing a movable cover piece provided in the mouthpiece body according to the second embodiment. (21) FIG. 21 is a cross-sectional view showing a movable cover piece provided on the mouthpiece body according to the third embodiment.

Claims (4)

The suction mouth body of an electric vacuum cleaner is characterized in that the suction mouth body of the electric vacuum cleaner comprises: a suction mouth cover having a suction mouth below, and a movable movable cover piece provided in at least one of the front-back direction of the suction mouth; and the movable cover piece. Comprising: a contact rotating part that rotates while contacting the floor surface during forward and backward movement of the mouthpiece cover, and a cover sheet portion that forms an opening between the forward and backward contact with the floor surface and closes the opening when the backward movement; The contact rotating part has a curvature at the contact starting part with the floor surface, and has at least one hollow part, and the lower part of the cover sheet part is located near the suction mouth of the suction mouth cover when the suction mouth cover is retracted. The same or a lower position, and a position higher than the front end of the contact rotating portion. For example, the suction mouthpiece of the electric vacuum cleaner in the first patent application range, wherein the cover sheet portion has a notch or a recess at the lower part, and when the mouthpiece cover is retracted, the uppermost part of the notch or the recess is located above the mouthpiece cover The vicinity of the suction mouth is the same or lower than it. For example, the suction nozzle body of the electric vacuum cleaner according to item 1 or 2 of the application, wherein the suction nozzle cover is provided with a cover member which can be detachably attached to the suction nozzle cover, and the shaft portion of the movable cover piece is located between the suction nozzle cover and the suction nozzle cover. Between the cover members. For example, the suction nozzle body of the electric vacuum cleaner according to item 1 or 2 of the application, wherein the above-mentioned contact rotating part is formed of a soft member.