Dust collector

Abstract

The vacuum cleaner of the present disclosure comprises: a suction source for generating a suction force for sucking dust; a suction pipe in which a flow path through which the dust sucked by the suction force of the suction source flows is formed; a storage battery accommodating part for accommodating a storage battery for supplying power to the suction source; a grip portion extending from the battery housing portion and formed so as to be gripped by a user; and an operation unit that is operated by operating the suction source. The grip portion has an extension portion extending from the battery housing portion on an extension line of the suction tube. The operating portion is provided at the extended portion of the grip portion.

Description

Technical Field

[0001] The invention relates to a vacuum cleaner with a built-in storage battery. Background Art

[0002] Various vacuum cleaners with built-in batteries have been developed (see Patent Document 1). Fig.11 As shown, the vacuum cleaner 900 of Patent Document 1 has a main body 910, which has a suction source 911 for generating suction force and a battery 912 for supplying power to the suction source 911. The battery 912 is arranged in front of the suction source 911 in the main body 910.

[0003] The vacuum cleaner 900 further includes a suction pipe 913 forming a flow path through which dust sucked up from the floor by the suction force of the suction source 911 flows, and a dust collecting unit 914 storing the dust that has passed through the suction pipe 913 .

[0004] The upper end of the suction pipe 913 is connected to the main body 910 at a position below the battery 912, and the suction nozzle 915 is connected to the lower end of the suction pipe 913. The suction nozzle 915 is configured to allow the suction pipe 913 to be sucked from the main body 910. Fig.11 The upright posture shown is tilted backwards, and when the suction tube 913 is in the backward tilted posture tilted backwards, the user can easily push the suction nozzle 915 forward while moving it on the ground.

[0005] The suction nozzle 915 is formed with a suction space opening toward the ground, and when the suction force of the suction source 911 acts, dust on the ground is sucked into the suction space. The width of the suction space is wider than the flow path of the suction pipe 913. Thus, when the suction source 911 is working, dust can be sucked from a wide area on the ground.

[0006] The dust collecting section 914 is composed of a substantially cylindrical container, and is connected to the suction pipe 913 in such a manner that the air flowing in through the suction nozzle 915 and the suction pipe 913 together with the dust forms a swirl flow in the dust collecting section 914. As a result of the swirl flow generated in the dust collecting section 914, a lot of dust is centrifugally separated and stored in the dust collecting section 914. In addition, a filter 916 for capturing fine dust that is not centrifugally separated is arranged between the dust collecting section 914 and the suction source 911.

[0007] A rod-shaped gripping portion 920 extending in the front-to-back direction is provided at a position spaced apart from the main body 910 upward. The space between the gripping portion 920 and the main body 910 is large enough for a user to insert a finger. The front end support portion 917 and the rear end support portion 918 are provided to hold the gripping portion 920 at a position spaced apart from the main body 910 upward. The front end support portion 917 extends upward from the main body 910 on the upper side of the portion of the main body 910 that accommodates the battery 912, and is connected to the front end of the gripping portion 920. The rear end support portion 918 protrudes upward from the rear side of the main body 910, and is connected to the rear end of the gripping portion 920.

[0008] The grip 920 is provided with an operating portion 921 for operating or stopping the suction source 911. The operating portion 921 is disposed at the front side of the grip 920 so that the user can grip the grip 920.

[0009] The larger the capacity of the battery 912, the longer the vacuum cleaner 900 can be continuously operated. On the other hand, if the capacity of the battery 912 increases, the battery 912 becomes heavier. The increase in the weight of the battery 912 may have adverse effects on the operation of the vacuum cleaner 900 as described below.

[0010] When the suction pipe 913 is Fig.11 In the upright position shown, the battery 912 is located on the extension line of the suction tube 913, and the grip 920 is located at the rear side relative to the extension line of the suction tube 913. If the user grips the grip 920 and pulls it backward from this state, the suction tube 913 and the main body 910 will tilt backward. In this state, the user's gripping part of the grip 920 may be located at a position lower than the battery 912. That is, when the user is observed from the user's side in the axial direction of the suction tube 913, the battery 912 is located at the upper side relative to the user's grip (hereinafter, the relative position of the battery 912 relative to the user's grip in this state is referred to as the "first rotation position"). If the user tilts the grip 920 to the left or right from this state, the main body 910 and the suction tube 913 may rotate around the axis of the suction tube 913, causing the direction of the suction nozzle 915 installed at the far end of the suction tube 913 to change. At this time, when viewed from the user's side, the battery 912 may be displaced to a position diagonally upward relative to the user's grip (hereinafter, the relative position of the battery 912 relative to the user's grip in this state is referred to as the "second rotation position").

[0011] When the user changes the orientation of the suction nozzle 100, the user performs an operation to tilt the grip 920 to the left or right, but usually, the suction nozzle 915 is moved forward to clean the floor while maintaining the battery 912 in the first rotational position. However, it is expected that the user will unconsciously tilt the grip 920 to the left or right while moving the suction nozzle 915 forward. If the battery 912 is displaced to the second rotational position due to this unconscious operation, the weight of the battery 912 will generate a rotational torque that twists the user's wrist. In this case, in order to resist the above-mentioned rotational torque, the user uses the wrist to exert force to hold the vacuum cleaner 900 so as to maintain the battery 912 in the first rotational position. If such a rotational torque is frequently generated, the user will feel wrist fatigue and will think that the vacuum cleaner 900 is difficult to operate.

[0012] Prior art literature

[0013] Patent Literature

[0014] Patent Document 1: Japanese Patent Publication No. 2019-69298 Summary of the invention

[0015] The object of the present disclosure is to provide a vacuum cleaner that makes the user less likely to feel tired.

[0016] The vacuum cleaner involved in one aspect of the present disclosure includes: a suction source that generates a suction force for sucking in dust; a suction pipe that forms a flow channel for the dust sucked in based on the suction force of the suction source to flow; a battery storage portion that stores a battery that supplies power to the suction source; a grip that extends from the battery storage portion and is formed to be gripped by a user; and an operating portion that is used to operate the suction source. The battery is arranged in the battery storage portion in a manner that is located on an extension line of the suction pipe. The grip portion includes: an extension portion that extends from the battery storage portion on an extension line of the suction pipe. The operating portion is provided on the base end side portion of the extension portion.

[0017] The vacuum cleaner described above can be operated with the influence of the weight of the battery reduced.

[0018] The objects, features and advantages of the present disclosure will become more apparent from the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a side view of the vacuum cleaner in an upright position.

[0020] Figure 2 is a side view of the vacuum cleaner in a rearwardly tilted position.

[0021] Figure 3 It is an expanded perspective view of the battery storage part of the vacuum cleaner.

[0022] Figure 4 It is a three-dimensional diagram of a suction nozzle of a vacuum cleaner.

[0023] Figure 5 It is a bottom view of the nozzle.

[0024] Figure 6 It is a cross-sectional view of the nozzle.

[0025] Figure 7 This is a simplified diagram of the vacuum cleaner viewed in the axial direction of the suction pipe.

[0026] Figure 8 This is a simplified diagram of the vacuum cleaner when the vacuum cleaner is rotated around the axis of the suction pipe.

[0027] Fig. 9 It is a perspective view when the vacuum cleaner is used as a portable vacuum cleaner.

[0028] Fig.10 It is a side view of other vacuum cleaners.

[0029] Fig.11 It is a cross-sectional view of a conventional vacuum cleaner. DETAILED DESCRIPTION

[0030] Hereinafter, the embodiments of the vacuum cleaner will be described in detail with reference to the accompanying drawings, but unnecessary detailed descriptions may be omitted. For example, detailed descriptions of well-known matters or repeated descriptions of substantially the same structures may be omitted. This is to avoid the following description from becoming unnecessarily lengthy so that it is easy for those skilled in the art to understand. In addition, the accompanying drawings and the following descriptions are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0031] <First Embodiment>

[0032] Figure 1 It is a schematic side view of a suction-type vacuum cleaner 200 including the suction nozzle 100 . Figure 1 The vacuum cleaner 200 is shown in an upright position. Figure 2 As shown in FIG. 1 , the vacuum cleaner 200 can also be tilted backward from the upright position to a backward tilted position. Figure 1 and Figure 2 The vacuum cleaner 200 will be described.

[0033] (Overall structure of the vacuum cleaner)

[0034] The vacuum cleaner 200 has: a fan housing portion 233, which houses a suction source 211 that generates a suction force for sucking dust; and a battery housing portion 232, which houses a battery 212 that supplies power to the suction source 211. The suction source 211 may include, for example, a motor; and a rotating blade that rotates based on the motor and is formed to generate an upward airflow. The battery 212 may be electrically connected to the motor to supply power to the motor of the suction source 211. The battery 212 is configured to be rechargeable, but it is more desirable to have a large capacity that is sufficient to allow the motor to work for a long time without being charged. In the case where the capacity of the battery 212 is large, the battery 212 may have a relatively large weight among the components constituting the vacuum cleaner 200. In this embodiment, the battery 212 has a greater weight than the fan housing portion 233 and the suction source 211 in the fan housing portion 233.

[0035] The fan housing portion 233 and the suction source 211 in the fan housing portion 233 are arranged at a height position substantially the same as the battery housing portion 232 and at the rear side of the battery housing portion 232 when the vacuum cleaner 200 is in an upright position. The fan housing portion 233 and the battery housing portion 232 are integrated, and the fan housing portion 233 and the battery housing portion 232 constitute the main body 210 of the vacuum cleaner 200. The fan housing portion 233 constitutes the rear side portion of the main body 210, and the battery housing portion 232 constitutes the front side portion of the main body 210.

[0036] Figure 1 The size of the battery storage section 232 in the vertical direction is larger than the size in the horizontal direction (width direction) and the front-back direction (depth direction) perpendicular thereto. Therefore, the battery storage section 232 can store a battery 212 that is long in the vertical direction.

[0037] like Figure 3 As shown, the battery storage section 232 has: a roughly semi-cylindrical member with a curved front portion and closed at both ends. Specifically, the battery storage section 232 has: a lower wall 234; an upper wall 235 disposed at a position spaced apart from the lower wall 234 and upward; and an outer peripheral wall 236 disposed between the lower wall 234 and the upper wall 235. The outer peripheral wall 236 surrounds the battery 212 in the circumferential direction except for the front portion of the battery 212, and a forward-opening removal port 237 is formed in the front portion of the outer peripheral wall 236 to allow the battery 212 to enter and exit the battery storage section 232.

[0038] The gripping portion 230 formed into a rod-like shape with a thickness that can be gripped by a user extends upward from the upper wall 235. The suction pipe 220 that forms a flow path for the dust sucked in based on the suction force of the suction source 211 to flow extends downward from the lower wall 234 on the opposite side of the gripping portion 230. On the extension line of the suction pipe 220, the battery 212 is fixed in the battery storage portion 232. On the other hand, the fan storage portion 233 and the suction source 211 in the fan storage portion 233 are located at a position offset to the rear side relative to the extension line of the suction pipe 220.

[0039] A terminal 250 is fixed in the battery storage section 232, and the terminal 250 is configured to be electrically connected to the battery 212 when the battery 212 is pushed into the battery storage section 232 through the removal port 237. In detail, the terminal 250 includes a terminal body 247 having a circuit for transmitting power from the battery 212 built therein, and a plurality of contact plates 248 protruding forward from the terminal body 247. A pair of power lines 249 is connected to the terminal body 247. These power lines 249 are extended in the fan storage section 233 and electrically connected to the suction source 211. Based on these power lines 249, a power supply path from the battery 212 to the suction source 211 is formed. The contact plate 248 is configured to be inserted into a connection hole (not shown) formed on the upper part of the rear side surface of the battery 212 when the battery 212 is pushed into the battery storage section 232 through the removal port 237. The terminal 250 is electrically connected to the battery 212 by inserting the contact plate 248 into the connection hole of the battery 212. In this state, the terminal 250 and the battery 212 are aligned in the front-rear direction and in contact with each other.

[0040] The removal port 237 provided on the peripheral wall 236 of the battery storage portion 232 is closed by a cover member 238. The cover member 238 is formed to overlap the battery storage portion 232 from the front side and has a curved thin plate shape. The upper and lower ends of the cover member 238 are provided with fixing portions 241 and 242 for fixing the cover member 238 to the peripheral wall 236. These fixing portions 241 and 242 are arranged in the vertical direction across the removal port 237 when the cover member 238 covers the removal port 237, and are fixed to the peripheral surfaces of the upper wall 235 and the lower wall 234 by screws. In order to hide the screws 243 and 244 for fixing the cover member 238 from the user, a decorative plate 245 is installed on the cover member 238.

[0041] like Figure 1As shown, the suction pipe 220 extending downward from the battery storage portion 232 has three tube bodies. One of these tube bodies is a base end tube portion 221 formed integrally with the lower wall 234 of the battery storage portion 232. That is, the base end (upper end) of the base end tube portion 221 is integrally connected to the lower wall 234 of the battery storage portion 232.

[0042] A dust collecting section 240 for storing dust sucked in based on the suction force of the suction source 211 is installed at the rear side of the base end tube 221 and at the lower side of the fan housing section 233. A flow outlet (not shown) opening to the rear is provided at the base end tube 221 so that dust and air flow out to the dust collecting section 240 at the rear side of the base end tube 221. The dust collecting section 240 is connected to the flow outlet of the base end tube 221 in such a manner that the air flowing into the dust collecting section 240 from the flow outlet of the base end tube 221 becomes a swirling flow inside the dust collecting section 240. In detail, the dust collecting section 240 is composed of a cylindrical container, which is connected to the flow outlet of the base end tube 221 in such a manner that the air flowing in from the flow outlet of the base end tube 221 flows along the inner circumferential surface of the dust collecting section 240. By generating a swirl flow in the dust collecting section 240 , dust contained in the air flowing into the dust collecting section 240 can be centrifugally separated.

[0043] A filter (not shown) is provided at the upper portion of the dust collecting portion 240. The filter is configured to allow air to flow from the dust collecting portion 240 toward the suction source 211 in the fan housing portion 233, and to capture dust contained in the air. As a result, the dust is retained in the dust collecting portion 240.

[0044] Another tube body among the three tube bodies is the intermediate tube part 223 connected to the base end tube part 221. The intermediate tube part 223 can be removed from the base end tube part 221. When the intermediate tube part 223 is removed from the base end tube part 221, the vacuum cleaner 200 can be used as a portable vacuum cleaner. In this state, for example, the vacuum cleaner 200 can be well used for cleaning objects placed at high places such as curtain rails.

[0045] The remaining tube body is the distal tube portion 222 connected to the lower end (distal end) of the intermediate tube portion 223, and the suction nozzle 100 is connected to the lower end (distal end) of the distal tube portion 222. When the intermediate tube portion 223, the distal tube portion 222, and the suction nozzle 100 are installed, the vacuum cleaner 200 can be used as a stick vacuum cleaner. In this state, for example, the vacuum cleaner 200 can be well used for cleaning the floor.

[0046] like Figure 4 and Figure 5As shown, the suction nozzle 100 has a suction nozzle housing 110. The suction nozzle housing 110 has a rear housing portion 111 that is elongated in the left-right direction, and a left housing portion 112 and a right housing portion 113 protrude forward from the left and right ends of the rear housing portion 111. A cover plate 114 that is elongated in the left-right direction is arranged on the front side of the rear housing portion 111, and the left and right ends of the cover plate 114 are fixed to the left and right housing portions 112 and 113. When the cover plate 114 is installed, a suction space 115 divided by the rear housing portion 111, the left housing portion 112, the right housing portion 113 and the cover plate 114 is formed on the front side of the rear housing portion 111.

[0047] The suction space 115 is provided to suck dust on the floor and is open downward. The suction space 115 is wider than the flow path of the suction pipe 220 , allowing dust in a wide area on the floor to flow into the suction space 115 .

[0048] In order to make the suction force of the suction source 211 act on the suction space 115, the rear housing portion 111 is provided with a Figure 6 The communication passage 119 is shown. On the rear side of the communication passage 119, the distal end portion 224 of the suction tube 220 (distal end tube portion 222) is connected to the rear housing portion 111. The distal end portion 224 has a substantially semi-cylindrical shape extending in the left-right direction.

[0049] The connection part 141 connected to the distal end part 224 of the suction pipe 220 is provided on the rear housing part 111. The connection part 141 is configured to allow the distal end part 224 to rotate around the axis within a specified rotation range while holding the distal end part 224 of the suction pipe 220. Therefore, the suction pipe 220 can be tilted in the front-rear direction within a specified range. That is, when the suction pipe 220 is tilted in the front-rear direction, the distal end part 224 of the suction pipe 220 can be relatively rotated relative to the rear housing part 111.

[0050] An opening is formed at the front side of the peripheral wall of the distal end portion 224 of the suction pipe 220 so as to connect the connecting passage 119 with the flow passage of the suction pipe 220. The size of the opening is set so that even if the suction pipe 220 is tilted backward at any angle, the flow passage of the suction pipe 220 is connected with the connecting passage 119. The flow passage of the suction pipe 220 is connected with the suction space 115 via the connecting passage 119, and the suction force of the suction source 211 acts on the suction space 115.

[0051] The suction space 115 is not only used to ensure a wide area for sucking dust on the floor, but also used to arrange the brush roller 120 for sweeping the dust on the floor. Figure 5 As shown, the brush roller 120 includes: a roller body 121 that is elongated in the left-right direction; and a plurality of brush rows 122 that protrude from the outer peripheral surface of the roller body 121 .

[0052] A rotating shaft (not shown) protrudes from the left and right ends of the roller body 121 and is rotatably supported by the left and right housing parts 112 and 113. In other words, the roller body 121 is rotatably supported by both sides of the left and right housing parts 112 and 113.

[0053] Each brush row 122 is formed by a plurality of bristles arranged in a spiral shape on the outer peripheral surface of the roller body 121. Figure 6 As shown, most of the brush roller 120 is accommodated in the suction space 115, but the brush row 122 located on the lower side of the roller body 121 protrudes downward from the suction space 115 and contacts the ground. Based on the brush row 122, the front side of the nozzle housing 110 is supported in a suspended state relative to the ground. The brush row 122 is configured to have sufficient rigidity to maintain this state.

[0054] like Figure 5 As shown, in order to generate a driving force for driving the brush roller 120 to rotate, the driving unit 130 (e.g., a driving motor) is disposed in the rear housing portion 111. In addition, a transmission mechanism (e.g., a pulley and a driving belt (not shown)) for connecting the driving unit 130 and the brush roller 120 so as to transmit the driving force of the driving unit 130 to the brush roller 120 is formed in the left housing portion 112 and the rear housing portion 111. When the driving unit 130 is operated, the brush roller 120 rotates, and the dust on the ground is swept up.

[0055] On the one hand, the front side portion of the nozzle housing 110 is supported based on the brush roller 120, and on the other hand, the rear side portion of the nozzle housing 110 is supported based on the brush roller 120. Figure 5 The left nozzle roller 123 and the right nozzle roller 124 are supported in a suspended state relative to the ground. The left nozzle roller 123 and the right nozzle roller 124 are configured to be roughly symmetrical with respect to the center line of the nozzle 100 (a line extending in the front-to-back direction at the center of the width direction of the nozzle 100).

[0056] The left nozzle roller 123 and the right nozzle roller 124 are rotatably mounted on a roller support 125 provided on the rear side of the rear housing 111. The roller support 125 is a substantially C-shaped member in plan view and is connected to the center portion of the rear housing 111 in the left-right direction.

[0057] The roller support portion 125 has a corner portion formed with a housing recess 126, 127 that opens downward to house the left nozzle roller 123 and the right nozzle roller 124. Most of the left nozzle roller 123 and the right nozzle roller 124 are housed in the housing recess 126, 127, but a portion of the left nozzle roller 123 and the right nozzle roller 124 protrudes from the housing recess 126, 127 and contacts the ground. At this time, the left nozzle roller 123 and the right nozzle roller 124 support the nozzle housing 110 in a state where the rear side portion of the nozzle housing 110 is suspended relative to the ground.

[0058] like Figure 5 As shown, the left suction nozzle roller 123 and the right suction nozzle roller 124 are installed on the roller support part 125 in a manner of rotating around a rotation axis inclined relative to the front-rear direction. The left suction nozzle roller 123 rolls on the ground in a manner of assisting the suction nozzle 100 to move diagonally to the left front. In other words, the inclination of the rotation axis of the left suction nozzle roller 123 is set so that when the suction nozzle 100 moves forward, the left suction nozzle roller 123 receives the friction force F1 from the ground to the right diagonally rearward and rolls on the ground. On the other hand, the right suction nozzle roller 124 rolls on the ground in a manner of assisting the suction nozzle 100 to move diagonally to the right front. In other words, the inclination of the rotation axis of the right suction nozzle roller 124 is set so that when the suction nozzle 100 moves forward, the right suction nozzle roller 124 receives the friction force F2 from the ground to the left diagonally rearward and rolls on the ground. For example, as Figure 5 As shown, the inclination angle of the rotation axis of the left nozzle roller 123 and the right nozzle roller 124 can be set to be approximately 45° relative to the center line of the nozzle 100.

[0059] The nozzle housing 110 is in a state of being suspended as a whole relative to the ground based on the left nozzle roller 123, the right nozzle roller 124 and the brush roller 120. Therefore, a space is formed between the left and right ends of the nozzle housing 110 and the ground to allow the nozzle housing 110 to tilt left and right. Therefore, when the suction tube 220 is in a backward tilted posture, the user can tilt the nozzle housing 110 left and right by rotating the gripping portion 230 around its axis. That is, if the user rotates the gripping portion 230 around its axis, the suction tube 220 rotates around the axis of the suction tube 220. The nozzle housing 110 installed at the far end of the suction tube 220 tilts left and right following the rotation of the suction tube 220.

[0060] The grip portion 230 is integrally formed with the upper wall 235 of the battery receiving portion 232. Figure 1As shown in the figure, the base end of the grip 230 is connected to the upper wall 235 on the extension line of the suction tube 220, and the grip 230 is extended upward from the connection portion. In this embodiment, the grip 230 is inclined slightly to the rear side relative to the upper wall 235, but is located on the extension line of the suction tube 220 over a substantially entire length. In the following description, the portion of the grip 230 located on the extension line of the suction tube 220 is referred to as an "extended portion".

[0061] In the present embodiment, the extended portion is substantially the entire length of the grip 230, and if the length of the extended portion is longer than the hand width of the user (i.e., the straight line distance from the radial metacarpal point to the ulnar metacarpal point of the user), the shape of the grip 230 is not particularly limited. For example, if the length of the extended portion is longer than the hand width of the user, the grip 230 may be in a more backward-leaning posture relative to the upper wall 235. According to data from the Artificial Intelligence Research Center, the average hand width of Japanese (adults) is about 83 mm, and therefore, the length of the grip 230 located on the extension line of the suction tube 220 is preferably set to be longer than 83 mm.

[0062] like Figure 3 As shown, an operation unit 231 is provided at the front side of the base end side portion of the extended portion (the portion located on the battery storage portion 232 side when the extended portion is bisected in the long side direction). The operation unit 231 is a portion that is operated to operate or stop the suction source 211 and the drive unit 130. In addition, a signal generation circuit (not shown) that outputs an electrical signal indicating the operation content in accordance with the operation of the operation unit 231 is provided in the grip portion 230. The signal generation circuit is electrically connected to a control circuit (not shown) that controls the suction source 211 and the drive unit 130.

[0063] (Vacuum cleaner action)

[0064] When the user uses the vacuum cleaner 200 as a stick vacuum cleaner, the user grips the grip portion 230 and pulls it backward, changing the posture of the vacuum cleaner 200 from Figure 1 The upright posture shown changes to Figure 2 In this state, the vacuum cleaner 200 is unlikely to fall forward, and the suction nozzle 100 can be easily moved forward.

[0065] If the user operates the operating part 231, the suction source 211 and the driving part 130 of the suction nozzle 100 will work. At this time, the gripping part 230 is extended from the battery storage part 232 on the extension line of the suction tube 220, and the operating part 231 is arranged on the battery storage part 232 side at the extended part. That is, the operating part 231 is arranged at a position close to the battery storage part 232. For example, if the user holds the gripping part 230 with his fingers on the operating part 231, the user's gripping part can also be located near the battery storage part 232. In addition, the gripping part can be located on the extension line of the suction tube 220. That is, the user's gripping part, the battery 212 and the suction tube 220 can be arranged in the axial direction of the suction tube 220. In other words, they are arranged in a state of being substantially coaxial.

[0066] When the suction source 211 is working, the suction force of the suction source 211 acts on the suction space 115 of the suction nozzle 100 through the dust collecting part 240, the suction pipe 220 and the connecting passage 119 of the suction nozzle 100. As a result, the dust on the ground is sucked into the suction space 115 and flows in the connecting passage 119 and the suction pipe 220, and flows into the dust collecting part 240 together with the air. In the dust collecting part 240, the air flows in a swirling flow, and the dust contained in the air is centrifugally separated and stored in the dust collecting part 240.

[0067] When the driving unit 130 is operated, the driving force of the driving unit 130 is transmitted to the brush roller 120. As a result, the brush roller 120 rotates on the ground and can sweep the dust on the ground. In addition, since the rotation force of the brush roller 120 becomes the propulsion force for moving the suction nozzle 100 forward, the user can move the suction nozzle 100 forward with a relatively light force.

[0068] At this time, the left nozzle roller 123 and the right nozzle roller 124 of the nozzle housing 110 roll around an axis that is inclined relative to the front-to-back direction. In other words, on the one hand, the left nozzle roller 123 rolls on the ground based on the friction force F1 in the right oblique rear direction between the ground and the left nozzle roller 123, and on the other hand, the right nozzle roller 124 rolls on the ground based on the friction force F2 in the left oblique rear direction between the ground and the right nozzle roller 124. Since the left nozzle roller 123 and the right nozzle roller 124 are configured to be symmetrical with respect to the central axis of the nozzle 100, the left and right components of these friction forces F1 and F2 can offset each other. Therefore, when the user moves the nozzle 100 forward, the left and right serpentine movement of the nozzle 100 is suppressed.

[0069] When changing the direction of travel of the suction nozzle 100, the user only needs to twist his wrist to rotate the grip 230 around its axis. Since the user's grip (the base end side portion of the extended portion of the grip 230) is placed approximately coaxially with the suction tube 220, the suction tube 220 is also rotated around the axis by rotating the grip 230 around the axis. At this time, the suction tube 220 is in a backward tilted posture, in which the nozzle housing 110 of the suction nozzle 100 tilts to the left or right based on the rotation of the suction tube 220. In detail, when viewed from the user, if the suction tube 220 rotates counterclockwise, the nozzle housing 110 tilts to the left. On the contrary, if the suction tube 220 rotates clockwise, the nozzle housing 110 tilts to the right.

[0070] If the nozzle housing 110 tilts to the left, the left nozzle roller 123 is pressed to the ground with a stronger force than the right nozzle roller 124. In this case, the left nozzle roller 123 has a stronger influence on the direction of travel of the nozzle 100 than the right nozzle roller 124, and the nozzle 100 moves forward obliquely to the left. On the contrary, if the nozzle housing 110 tilts to the right, the nozzle 100 moves forward obliquely to the right.

[0071] As described above, the user can tilt the nozzle housing 110 by rotating the grip 230 around its axis. At this time, the user's grip (i.e., the base end side portion of the extended portion of the grip 230), the battery 212 and the suction tube 220 rotate approximately coaxially. Since the battery 212 is arranged on the rotating shaft of the rotational motion, the center of gravity of the battery 212 is located on or near the rotating shaft. Therefore, the battery 212 does not generate a large rotational torque around the rotating shaft, and the user can twist the wrist and rotate the grip 230 around its axis without feeling the weight of the battery 212. Since the user is not easy to feel the weight of the battery 212, the battery 212 can have a certain degree of large weight. If the battery 212 is allowed to have a large weight, it is possible to increase the capacity of the battery 212. If the battery 212 has a large capacity, the suction source 211 can be kept working for a long time without charging the battery 212.

[0072] On the other hand, the suction source 211 in the fan housing 233 is different from the battery 212. It is not on the extension line of the suction pipe 220. When the user rotates the grip 230 around its axis, it moves around the rotation axis at a position away from the rotation axis. Figure 2 When the grip portion 230 is rotated about its axis (counterclockwise) in the backward tilted position shown in FIG. Figure 7 Move upward around the axis to the position shown Figure 8 At this time, the weight of the fan housing 233 and the suction source 211 generates a rotational moment acting in the direction of resisting the circular movement, so the operator will feel the weight of the fan housing 233 and the suction source 211 when twisting the wrist to rotate the grip 230 around its axis. Therefore, it is more ideal to reduce the weight of the fan housing 233 and the suction source 211 as much as possible. Therefore, in this embodiment, the weight of the fan housing 233 and the suction source 211 is smaller than the weight of the battery 212.

[0073] Even if the fan housing 233 and the suction source 211 are lightweight, they still have a certain degree of weight. Figure 8 The user releases the force of holding the grip portion 230 while maintaining the grip portion 230, and the rotational torque generated by the weight of the fan housing portion 233 and the suction source 211 causes the rotation position of the vacuum cleaner 200 to return to Figure 7 That is, after the nozzle 100 is tilted by rotating the gripping portion 230 about its axis in order to change the direction of travel of the nozzle 100, the user can restore the nozzle 100 to the position when the nozzle 100 is moving straight by simply relaxing the gripping force of the gripping portion 230.

[0074] During the cleaning operation, in order to avoid obstacles, the user may lift the suction nozzle 100 from the ground upward. At this time, the user holds the grip 230 at a position close to the battery storage portion 232, so the user's grip is located at a position close to the battery 212 in the axial direction of the suction tube 220. At this time, if the user bends his wrist upward, the suction nozzle 100 can be lifted. The rotational torque that resists this action is generated based on the weight of the battery 212, but since the battery 212 is located at a position close to the user's grip, the rotational torque will not become too large. In addition, the suction source 211 is also located at a position close to the user's grip in the axial direction of the suction tube 220 and is relatively light. Therefore, when the user lifts the suction nozzle 100 from the ground, he does not feel the weight of the suction source 211 very much and can easily lift the suction nozzle 100.

[0075] It can be expected that when the user moves the suction nozzle 100 forward, the suction nozzle 100 will collide with an obstacle in front. At this time, the collision force acts backward on the suction nozzle 100. If such a collision force acts on the suction nozzle 100 while the user holds the grip 230, the collision force is likely to act on the battery storage portion 232 through the suction tube 220. The battery storage portion 232 is relatively long in the axial direction of the suction tube 220, and therefore, it is easy to elastically deform in the axial direction of the suction tube 220 based on the collision force. In particular, a removal port 237 is formed on the front side of the battery storage portion 232, and the rigidity of the battery storage portion 232 is relatively small around the removal port 237. Therefore, it can be inferred that the amount of elastic deformation around the removal port 237 is easy to increase.

[0076] When the battery receiving portion 232 elastically extends in the axial direction of the suction tube 220, if the battery 212 and the terminal 250 are in contact in the same direction as the extending direction, their contact state may be released due to the extension of the battery receiving portion 232. That is, if either the battery 212 or the terminal 250 is displaced in the axial direction of the suction tube 220 as the battery receiving portion 232 extends, the battery 212 and the terminal 250 may be in a state of being separated from each other. On the other hand, in the present embodiment, the battery 212 and the terminal 250 are in contact in the front-to-back direction rather than in the axial direction of the suction tube 220. Therefore, the contact state of the battery 212 and the terminal 250 is not easily affected by the elastic deformation of the battery receiving portion 232 in the axial direction of the suction tube 220. That is, even if the battery receiving portion 232 is elastically deformed in the axial direction of the suction tube 220, the battery 212 and the terminal 250 can maintain the contact state. In other words, poor contact between the battery 212 and the terminal 250 is unlikely to occur.

[0077] In addition, in the present embodiment, the elastic deformation (extension and compression) of the battery housing portion 232 in the axial direction of the suction pipe 220 is suppressed based on the cover member 238. That is, when the battery housing portion 232 is about to elastically extend in the axial direction of the suction pipe 220, the outlet 237 is also about to expand in the axial direction of the suction pipe 220. The upper and lower ends of the cover member 238 that covers the outlet 237 are provided with fixing portions 241 and 242, and these fixing portions 241 and 242 are fixed to the outer peripheral wall 236 that forms the outlet 237 by screws 243 and 244. The fixing portions 241 and 242 are arranged in the expansion direction of the outlet 237 (that is, the axial direction of the suction pipe 220) across the outlet 237, so that if the outlet 237 is about to expand, tensile stress is generated on the cover member 238. If the lid member 238 has high rigidity and is hardly deformed against such tensile stress, it is possible to suppress elastic deformation that causes the removal port 237 to expand in the axial direction of the suction pipe 220. On the contrary, even if a compressive force that causes the removal port 237 to contract in the axial direction of the suction pipe 220 acts on the battery housing portion 232, the lid member 238 can suppress elastic deformation of the battery housing portion 232 against the compressive force.

[0078] In this embodiment, the fan housing 233 and the dust collecting part 240 are arranged at positions offset to the rear side relative to the extension line of the suction pipe 220. Therefore, the vacuum cleaner 200 does not become too long in the axial direction of the suction pipe 220. Fig. 9 When the portable vacuum cleaner 200 is used as shown, the total length of the vacuum cleaner 200 will not become too long, so the user will not let the vacuum cleaner 200 collide with the surrounding furniture when using it. In addition, if the length of the vacuum cleaner 200 in the axial direction of the suction pipe 220 is not a problem, it can also be as shown in FIG. Fig.10 As shown, the fan housing portion 233 and the dust collecting portion 240 are disposed on the extension line of the suction pipe 220 .

[0079] exist Fig. 9 In the state shown (state of the portable vacuum cleaner), the main body 210 is larger than the suction tube 220 in the width direction and the depth direction, and is easy to contact the surrounding furniture. Therefore, it can be expected that when the main body 210 is about to contact the furniture, the user twists his wrist to rotate the grip 230 around its axis to avoid the rotational action of the main body 210 contacting the furniture. When performing such a rotational action, since the suction tube 220 and the user's grip rotate approximately coaxially, the position on the rotation axis of the rotational action can be maintained. That is, since the suction tube 220 is almost not displaced in the width direction and the depth direction, it is easy to avoid the suction tube 220 from contacting the surrounding furniture during the above-mentioned rotational action.

[0080] In the above embodiment, the grip portion 230 is inclined slightly backward relative to the upper wall 235. Alternatively, the grip portion 230 may be located on the extension line of the suction pipe 220 over the entire length and extend at a right angle to the upper wall 235.

[0081] In the above embodiment, the wide suction nozzle 100 is installed in the vacuum cleaner 200 , but other suction nozzles may also be installed in the vacuum cleaner 200 . For example, in order to clean a narrow gap, the user may install a pointed suction nozzle to the distal end of the suction pipe 220 .

[0082] In the above-mentioned embodiment, the battery 212 can be taken out from the battery storage section 232 via the removal port 237. In this case, the user can charge the battery 212 in a state where the battery 212 is taken out from the battery storage section 232. As an alternative, the vacuum cleaner 200 can also be configured to charge the battery 212 in a state where the battery 212 is accommodated in the battery storage section 232. In this case, it is not necessary to form the removal port 237 in the battery storage section 232. In the case where the removal port 237 is not formed in the battery storage section 232, the structural strength of the battery storage section 232 can be improved.

[0083] (Effects, etc.)

[0084] The vacuum cleaner 200 according to the above-described embodiment has the following features and has the following effects.

[0085] One aspect of the above-mentioned embodiment involves a vacuum cleaner including: a suction source that generates a suction force for sucking dust; a suction pipe that forms a flow channel for the dust sucked in based on the suction force of the suction source to flow; a battery storage portion that stores a battery that supplies power to the suction source; a grip that extends from the battery storage portion and is formed to be gripped by a user; and an operating portion that is used to operate the suction source. The battery is arranged in the battery storage portion in a manner that is located on an extension line of the suction pipe. The grip portion includes: an extension portion that extends from the battery storage portion on an extension line of the suction pipe. The operating portion is provided on the base end side portion of the extension portion.

[0086] According to the above-mentioned structure, since the operating part is arranged on the base side part of the extension part of the gripping part, it is possible to facilitate the user to hold the base side part of the gripping part. Since the extension part of the gripping part is extended from the battery receiving part that receives the battery, the gripping part of the user holding the base side part of the gripping part will be near the battery. In this state, if the user bends his wrist upward to change the direction of the distal end of the suction tube, the weight of the battery will cause a rotational torque in the direction of resisting the action to act on the gripping part of the user. However, since the distance between the gripping part of the user and the battery is short, the rotational torque is small. Therefore, even if the user performs such an action, the battery will not impose a large load on the user.

[0087] Furthermore, since the extended portion of the grip held by the user extends from the battery storage portion on the extension line of the suction tube, the grip of the user can be placed approximately coaxially with the suction tube. At this time, when the user twists his wrist to rotate the grip around its axis, the suction tube rotates approximately coaxially with the grip of the user, and the position on the rotating shaft during the rotation can be maintained. For example, in order to prevent the vacuum cleaner from contacting furniture with the portion other than the suction tube, it can be imagined that the user rotates the grip around its axis. At this time, since the suction tube is hardly displaced in the front-to-back direction and the left-to-right direction, it is easy to prevent the suction tube from contacting furniture located around the suction tube.

[0088] Furthermore, since the battery is also disposed on the extension line of the suction tube, the grip of the user, the battery, and the suction tube can be arranged in the axial direction of the suction tube. Therefore, the battery also rotates approximately coaxially with the grip of the user. At this time, since the battery rotates on the rotation axis during the rotation action, the center of gravity of the battery can be on the rotation axis or close to the rotation axis. Therefore, the battery does not generate a large rotational torque around the rotation axis. Therefore, the user can perform the above-mentioned rotation action without feeling much weight of the battery.

[0089] In the above configuration, the extended portion of the grip may have a length greater than a specified length, which is preset as a length corresponding to the straight-line distance from the radial metacarpal point to the ulnar metacarpal point of an adult, that is, the hand width.

[0090] According to the above-mentioned configuration, the extended portion of the gripping portion extends from the battery housing portion on the extension line of the suction tube within a length range greater than a specified length pre-set as a length equivalent to the width of an adult's hand, so that the user can grip the extended portion of the gripping portion on the extension line of the suction tube with the entire hand.

[0091] In the above-mentioned configuration, the suction source may be provided at a position offset from an extension line of the suction pipe.

[0092] According to the above configuration, since the suction source is provided at a position offset from the extension line of the suction pipe, the cleaner does not become excessively long in the axial direction of the suction pipe.

[0093] In the above configuration, the suction source may be disposed adjacent to the battery housing portion.

[0094] According to the above-mentioned structure, since the suction source is located at a position offset relative to the extension line of the suction tube and adjacent to the battery storage portion, the suction source is located at a position closer to the position where the user holds the grip in the axial direction of the suction tube. If the user bends his wrist upward while holding the grip to change the direction of the distal end of the suction tube, the weight of the battery will cause a rotational torque in the direction of resisting the action to act on the user's grip. However, since the user's grip and the suction source are arranged at positions close to each other in the axial direction of the suction tube, the rotational torque is small. Therefore, even if the user performs such an action, the suction source will not impose a large load on the user.

[0095] In the above-mentioned configuration, the suction source can be lighter than the battery.

[0096] According to the above configuration, when the suction source is arranged at a position offset from the extension line of the suction tube and adjacent to the battery storage portion, the suction source is located at a position away from the rotation axis in the rotational action of rotating the grip portion around its axis. Therefore, the suction source may generate a rotational moment that resists the rotational action, but since the suction source is relatively light, the rotational moment does not become too large.

[0097] In the above-mentioned configuration, the vacuum cleaner may further include: a suction nozzle connected to the distal end of the suction pipe in a manner that the dust on the ground is sucked in based on the suction force of the suction source. The suction nozzle may have: a nozzle housing connected to the distal end of the suction pipe in a manner that allows the suction pipe to change from an upright position to a backward-leaning position; and a left suction nozzle roller and a right suction nozzle roller, which are installed in a pair of left and right positions on the suction nozzle housing in a manner that rolls on the ground. The left suction nozzle roller and the right suction nozzle roller may support the suction nozzle housing in a suspended state relative to the ground in a manner that allows the suction nozzle housing to tilt to the left or right when the suction pipe is in a backward-leaning position and when the suction pipe rotates around its axis. The left suction nozzle roller may be in a state where the suction nozzle housing is in contact with the ground with a force stronger than that of the right suction nozzle roller when the suction nozzle housing tilts to the left, and in this state and when the suction nozzle is pushed forward, it rolls on the ground in a manner that promotes the suction nozzle to move obliquely to the left and forward. The right nozzle roller can be in contact with the ground with a stronger force than the left nozzle roller when the nozzle housing tilts to the right, and in this state and when the nozzle is pushed forward, it rolls on the ground in a manner that promotes the nozzle to move diagonally to the right and forward.

[0098] According to the above-mentioned structure, the user can push the suction nozzle forward while moving it forward on the ground by changing the suction tube from an upright position to a backward-leaning position. When the user moves the suction nozzle forward in this state, if the grip is rotated around its axis, the suction tube rotates approximately coaxially with the grip, as described above. At this time, the nozzle housing tilts to the left or right in response to the rotation of the suction tube. When the nozzle housing tilts to the left, the left nozzle roller is in contact with the ground with a stronger force than the right nozzle roller, and the influence of the left nozzle roller on the direction of travel of the suction nozzle is stronger than that of the right nozzle roller. When the suction nozzle is pushed forward, the left nozzle roller rolls on the ground in a manner that promotes the suction nozzle to move diagonally to the left and front. Therefore, the suction nozzle can be moved diagonally to the left and front by the user rotating the grip to tilt the nozzle housing to the left. On the contrary, if the user tilts the nozzle housing to the right, the suction nozzle moves diagonally to the right and front.

[0099] In the above configuration, the suction source may be arranged so as to be located on the rear side of the battery housing portion when the suction tube is in the upright position.

[0100] According to the above-mentioned structure, the suction source is located at the rear side of the battery storage part when the suction tube is in an upright position. Therefore, if the suction tube is changed to a backward-leaning position, the suction source is located at the lower side of the extension line of the suction tube. In this state, if the user rotates the grip around its axis in order to tilt the nozzle housing to the left or right, the suction source will circulate upward around the axis of the rotation from the position below the extension line of the suction tube. At this time, the weight of the suction source plays a role in returning the suction source to the position below the extension line of the suction tube. Therefore, the user can return the vacuum cleaner to the original backward-leaning position by simply relaxing the force of holding the grip.

[0101] In the above configuration, the battery storage portion may include: a lower wall connected to the suction tube; an upper wall connected to the grip; and an outer peripheral wall located between the lower wall and the upper wall and surrounding the battery in the circumferential direction. The outer peripheral wall may be formed with a take-out port for taking out the battery.

[0102] According to the above configuration, the outlet for taking out the battery is not provided on either the lower wall connected to the suction tube or the upper wall connected to the grip, but is provided on the outer peripheral wall between them and surrounding the battery in the circumferential direction. Therefore, the outlet can be formed without being obstructed by the grip and the suction tube.

[0103] In the above configuration, the vacuum cleaner may further include: a cover member for closing the outlet; and a pair of fixing parts provided on the cover member in such a manner as to fix the cover member on the outer peripheral wall. The battery storage part may be as follows: the size in the axial direction of the suction pipe is larger than the size in the width direction and the depth direction at right angles to the axial direction of the suction pipe. The pair of fixing parts may be as follows: arranged in the axial direction of the suction pipe across the outlet and connected to the outer peripheral wall.

[0104] According to the above-mentioned structure, since the battery storage part is larger in the axial direction of the suction pipe, it can be expected that the elastic deformation of the battery storage part in the axial direction of the suction pipe is larger than that in the width direction and the depth direction. In particular, the strength of the portion where the removal port is formed is likely to be low, and the elastic deformation of the battery storage part is likely to be large. On the removal port, a cover member is installed to prevent the battery from escaping from the battery storage part. However, by providing a pair of fixing parts on the cover member, the elastic deformation of the battery storage part in the axial direction can be suppressed by utilizing the rigidity of the cover member as follows. That is, a pair of fixing parts are arranged in the axial direction of the suction pipe across the removal port and are connected to the outer peripheral wall. In this connected state, when the battery storage part elastically stretches in the axial direction of the suction pipe in a state where the cover member closes the removal port, tensile stress is generated on the cover member, and the elastic deformation of the battery storage part in the axial direction can be suppressed based on the rigidity of the cover member.

[0105] In the above configuration, the vacuum cleaner may further include: a terminal housed in the battery housing and in contact with the battery; and a power line extending from the terminal to the suction source and forming a power supply path from the battery to the suction source. The battery housing may be such that the size in the axial direction of the suction pipe is larger than the size in the width direction and the depth direction at right angles to the axial direction of the suction pipe. The battery and the terminal may be configured so as not to be arranged in the axial direction of the suction pipe.

[0106] According to the above-mentioned structure, if the battery is in contact with the terminal, the power of the battery can be supplied to the suction source through the terminal and the power line extending from the terminal to the suction source. In the case where the battery housing is longer in the axial direction of the suction tube, as described above, it can be expected that the battery housing will undergo elastic elongation and deformation in this direction. At this time, if the battery and the terminal are arranged in the axial direction of the suction tube, one of the battery and the terminal will be displaced in the axial direction of the suction tube as the battery housing is elongated, so that their contact state may be lost. On the other hand, if the battery and the terminal are not arranged in the axial direction of the suction tube, even if the battery housing is elongated, it is easy to maintain their contact state, and thus it is easy to maintain the power supply from the battery to the suction source.

[0107] Industrial Applicability

[0108] The above-described technology can be advantageously utilized in devices used for cleaning operations.

Claims

1. A vacuum cleaner, characterized in that include: A suction source, generating a suction force for sucking in dust; A suction pipe having a flow passage formed therein for allowing dust sucked in based on the suction force of the suction source to flow; a battery storage portion for storing a battery for supplying power to the suction source; A grip portion extending from the battery receiving portion and formed to be gripped by a user; as well as, An operating unit is used to operate the suction source; wherein, The battery is arranged in the battery storage portion so as to be located on an extension line of the suction pipe. The gripping portion includes an extended portion extending from the battery storage portion on the extension line of the suction pipe. The operation portion is provided at a base end side portion of the extended portion.

2. The vacuum cleaner according to claim 1, characterized in that: The extended portion of the grip portion has a length greater than a specified length, and the specified length is preset as a length corresponding to a straight-line distance from a radial metacarpal point to an ulnar metacarpal point of an adult, that is, a hand width.

3. The vacuum cleaner according to claim 1 or 2, characterized in that: The suction source is disposed at a position offset from the extension line of the suction pipe.

4. The vacuum cleaner according to claim 3, characterized in that: The suction source is disposed at a position adjacent to the battery housing portion.

5. The vacuum cleaner according to claim 4, characterized in that: The suction source is lighter than the battery.

6. The vacuum cleaner according to claim 1 or 2, characterized in that Also includes: A suction nozzle is connected to the distal end of the suction pipe in a manner that the dust on the ground is sucked in based on the suction force of the suction source; wherein, The suction nozzle comprises: a suction nozzle housing connected to the distal end of the suction pipe in a manner allowing the suction pipe to change from an upright posture to a backward tilted posture; and a left suction nozzle roller and a right suction nozzle roller mounted on the suction nozzle housing in a pair of left and right positions in a manner rolling on the ground. The left suction nozzle roller and the right suction nozzle roller support the suction nozzle shell in a suspended state relative to the ground in a manner that allows the suction nozzle shell to tilt to the left or right when the suction tube is in the backward tilted posture and the suction tube rotates around its axis. When the nozzle housing tilts to the left, the left nozzle roller comes into contact with the ground with a stronger force than the right nozzle roller, and in this state and when the nozzle is pushed forward, it rolls on the ground in a manner that promotes the nozzle to move diagonally forward to the left. The right nozzle roller contacts the ground with a stronger force than the left nozzle roller when the nozzle housing tilts to the right, and in this state and when the nozzle is pushed forward, it rolls on the ground in a manner that promotes the nozzle to move diagonally to the right and forward.

7. The vacuum cleaner according to claim 6, characterized in that: The suction source is arranged to be located at a rear side of the battery housing portion when the suction tube is in the upright position.

8. The vacuum cleaner according to claim 1 or 2, characterized in that: The battery storage portion comprises: a lower wall connected to the suction tube; an upper wall connected to the gripping portion; and an outer peripheral wall located between the lower wall and the upper wall and surrounding the battery in the circumferential direction. The outer peripheral wall is formed with a take-out port for taking out the battery.

9. The vacuum cleaner according to claim 8, characterized in that Also includes: a cover member for closing the removal port; and A pair of fixing portions are provided on the cover member in such a manner as to fix the cover member to the outer peripheral wall; wherein, The size of the battery storage portion in the axial direction of the suction pipe is larger than the sizes in the width direction and the depth direction which are perpendicular to the axial direction of the suction pipe. The pair of fixing portions are arranged in the axial direction of the suction pipe across the removal port, and are connected to the outer peripheral wall.

10. The vacuum cleaner according to claim 8, characterized in that Also includes: a terminal received in the battery receiving portion and in contact with the battery; as well as, A power line is extended from the terminal to the suction source and forms a power supply path from the battery to the suction source; wherein, The size of the battery storage portion in the axial direction of the suction pipe is larger than the sizes in the width direction and the depth direction which are perpendicular to the axial direction of the suction pipe. The storage battery and the terminal are arranged so as not to be aligned in the axial direction of the suction pipe.

Images