JP2014018342A - Handheld cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hand-held cleaner capable of ensuring a sufficient suction force even in a blower mode. . The housing 10 is formed with a suction port 12a, a discharge port portion 11a, and a blowout port 16a, and an air passage that connects them is provided. The air passage includes a first wall portion 14 and a second wall portion 15. The first wall portion 14 extends outward in the radial direction of the output shaft 22 of the motor 2 to guide the air from the fan 3 outward in the radial direction. The second wall portion 15 is connected to the first wall portion 14 and extends in a direction crossing the first wall portion 14 to guide the air from the fan 3 to the blowout port 16a in a substantially straight line shape.
[Selection] Figure 2

Description

  The present invention relates to a hand-held cleaner, and more particularly to a hand-held cleaner capable of sucking air from an air suction port and capable of blowing air from an air outlet.

  As a hand-held cleaner driven by a secondary battery, a structure including a suction mode for discharging air from an air exhaust port and a blower mode for discharging air from an air outlet is known (Patent Document 1).

JP-A-62-137026

  In the conventional hand-held cleaner, the exhaust passage is different between the suction mode and the blower mode, and when the air is discharged in the blower mode, the suction force is reduced due to the large resistance of the passage.

  Therefore, an object of the present invention is to provide a hand-held cleaner that can ensure a sufficient suction force even in the blower mode.

  In the present invention, an air blowing port, an air suction port, an air passage connecting the air blowing port and the air suction port, a housing formed in the housing, A motor having a projecting output shaft, a fan disposed in the air passage, fixed to the output shaft and driven to rotate by the motor, the fan in the air passage, and the air suction port. A dust collecting filter provided between the fan and the air passage from the fan by supporting the motor and extending radially outward of the output shaft from between the main body and the fan. A first wall portion that guides the air outward in the radial direction, and extends in a direction intersecting with the first wall portion and intersecting the first wall portion. 2nd wall to guide Provides a portable cleaner, characterized in that it comprises a and.

  With such a configuration, air from the fan is guided radially outward by the first wall portion and guided to the air outlet by the second wall portion intersecting the first wall portion in a substantially straight line. There is no space where air stagnates at the intersection of the first wall and the second wall, and the generation of vortices at that location is suppressed. Thereby, the flow path resistance when air is blown out from the air outlet is reduced, and the suction force can be increased. Further, since the second wall portion guides the air to the air outlet in a straight line, the flow path resistance can be further reduced.

  The housing is formed with an air exhaust port for discharging at least part of the air sucked into the air passage from the air suction port to the outside of the air passage, and the air that has flowed into the air passage is formed in the housing. It is preferable to further include a switching unit that switches the discharge between the air exhaust port and the air outlet.

  According to such a configuration, by switching the switching unit, it is possible to switch between a suction mode for discharging air from the air exhaust port and a blower mode for discharging air from the air outlet. Thereby, the handheld cleaner which can switch a mode according to a use can be provided.

  Moreover, it is preferable that the said air exhaust port is formed in the radial direction outer side of the said fan.

  According to such a configuration, since the exhaust resistance in the suction mode for discharging air from the air exhaust port is reduced, the suction force is increased. Thereby, the improvement of a suction work rate can be aimed at.

  The opening area of the air exhaust port is preferably larger than the opening area of the air outlet.

  According to such a configuration, the suction force is higher in the suction mode in which air is discharged from the air exhaust port than in the blower mode in which air is discharged from the air outlet. Thereby, the improvement of the suction work rate at the time of suction mode can be aimed at.

  As described above, according to the present invention, it is possible to provide a hand-held cleaner that can ensure a sufficient suction force even in the blower mode.

The side external view which shows the handheld cleaner by embodiment of this invention. Sectional drawing which shows the handheld type cleaner by embodiment of this invention. The top view of the handheld cleaner by embodiment of this invention. The front view of the handheld cleaner by embodiment of this invention. Sectional drawing along VV of FIG. 2 of the handheld cleaner by embodiment of this invention. The side view of the switching part of the handheld cleaner by embodiment of this invention. The elements on larger scale of the exhaust port of the handheld cleaner by embodiment of this invention.

  A handheld cleaner 1 according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the hand-held cleaner 1 includes a housing 10, a motor 2, a fan 3, a battery 4, and a dust collection filter 5. In the following description, the left side in FIG. 1 is defined as the rear side of the hand-held cleaner 1, the right side is defined as the front side of the hand-held cleaner 1, the upper side is defined as the upper side of the hand-held cleaner 1, and the lower side is defined as the lower side of the hand-held cleaner 1. To explain. Further, the right side in FIG. 4 is defined as the left side of the hand-held cleaner 1, and the right side is defined as the left side of the hand-held cleaner 1.

  The housing 10 includes a main body side housing 11 and a cover side housing 12, and the cover side housing 12 can be attached to and detached from the main body side housing 11. As shown in FIG. 2, the cover-side housing 12 includes an air blowing tube portion 16 in which a blowing port 16 a that blows air is formed. An engaging portion 11 </ b> A that engages with the cover side housing 12 is provided on the lower surface of the main body side housing 11. On the upper surface of the main body side housing 11, a latch portion 11B that engages with the cover side housing 12 by pressing is provided. The main body side housing 11 is provided with a spring 11C that urges the rear portion of the latch portion 11B upward. When the rear portion of the latch portion 11B is pressed against the urging force of the spring 11C, the tip of the latch portion 11B moves upward and the engagement between the main body side housing 11 and the cover side housing 12 is released.

  As shown in FIGS. 1 and 3, exhaust port portions 11 a are respectively formed on the side surfaces of the main body side housing 11 in the left-right direction. A handle portion 11E is provided in the upper part of the main body side housing 11, and the handle portion 11E and the main body side housing 11 are integrally formed of plastic. A trigger 13 that can be operated by the user is provided at the front end of the handle portion 11E. The exhaust port portion 11a corresponds to the air exhaust port of the present invention.

  As shown in FIG. 2, an engaged portion 12A that can engage with the engaging portion 11A is provided on the lower surface of the cover-side housing 12. On the upper surface of the cover-side housing 12, a latch engaging portion 12B that engages with the distal end portion of the latch portion 11B is provided. The cover side housing 12 is formed with a suction port 12a for sucking air. Detailed configurations of the main body side housing 11 and the cover side housing 12 will be described later.

  The motor 2 is provided in the main body side housing 11 and supported by the main body side housing 11 at a position slightly ahead of the center of the main body side housing 11 in the front-rear direction, and is electrically connected to the battery pack 4 and the trigger 13. It is connected to the. The motor 2 includes a main body 21 and an output shaft 22 protruding from the main body 21. The main body 21 and the output shaft 22 are inclined so as to be lowered rearward. Hereinafter, the direction in which the motor 2 is inclined is referred to as a motor inclination direction A.

  The fan 3 is a centrifugal fan and is disposed inside the front end portion of the main body side housing 11. The fan 3 is fixed to the output shaft 22 of the motor 2, and the fan 3 can be rotated coaxially and integrally with the output shaft 22. The fan 3 takes in the air that has passed through the dust collection filter 5 from the motor tilt direction A and discharges it outward in the radial direction of the output shaft 22.

  As shown in FIGS. 5A and 5B and FIG. 6, a switching unit 31 that switches the mode of the handheld cleaner 1 between the suction mode and the blower mode is provided outside the fan 3 in the radial direction. In the suction mode, the air sucked from the suction port 12a is discharged from the exhaust port 11a, and in the blower mode, the air sucked from the suction port 12a is blown out from the blowout port 16a. In the suction mode, since the opening area of the exhaust port portion 11a is larger than that of the blowout port 16a, a strong suction force can be obtained. In the blower mode, since air is not discharged from the exhaust port 11a, cleaning can be performed without winding up surrounding dust.

  The switch 31 is provided with two knobs 32 projecting outward in the radial direction so as to face each other at 180 ° with the fan 3 interposed therebetween. By gripping the knob 32 and rotating the switch 31, You can switch modes. The switching portion 31 is formed with a vent portion 31 a penetrating in the radial direction at a position facing the fan 3 by 180 ° across the fan 3. The vent 31a is composed of a plurality of vents 31b, and ribs 31A are provided between the vents 31b. Thereby, the opening area of the vent 31b can be secured widely while maintaining the strength of the switching unit 31.

  In the suction mode, as shown in FIG. 5A, each vent 31a faces the exhaust port 11a, and the air from the fan 3 is directly discharged from the exhaust port 11a to the outside. . In the blower mode, as shown in FIG. 5 (b), one vent portion 31a communicates with a passage portion 15a, which will be described later, which communicates with the blowout port 16a, and the other vent portion 31a is a cover-side housing. 12 is blocked. The circumferential distance in which the vent portion 31a is formed is longer than the distance along the circumferential direction of the passage 15a. That is, in the blower mode, the vent portion 31a is located over the entire circumferential direction of the passage portion 15a. Thereby, flow path resistance at the time of blower mode can be reduced. In addition, one vent 31a is closed in the blower mode, whereas two vents 31a are open in the suction mode, so a stronger suction force can be obtained in the suction mode. it can.

  The battery pack 4 is detachably provided at the lower part of the rear end portion of the main body side housing 11 and contains lithium ion battery cells.

  As shown in FIG. 2, a dust collection filter 5 is provided in the cover side housing 12. The dust collection filter 5 is a pre-filter 51 made of a metal mesh that forms an outer shell, a filter medium 52 made of a non-woven fabric positioned inside the pre-filter 51, and is positioned inside the filter medium 52 to prevent the filter medium 52 from being crushed inside. The reinforcing part 53 includes a fixing part 54 that fixes the prefilter 51 and the filter medium 52 to the cover-side housing 12. The prefilter 51 and the filter medium 52 are fixed to the main body side housing 11 by being sandwiched between the main body side housing 11 and the fixing portion 54. The prefilter 51 and the filter medium 52 can be exchanged by removing the fixing portion 54 from the main body housing 11. The reinforcing portion 53 is configured to be detachable from the main body side housing 11.

  Next, detailed configurations of the main body side housing 11 and the cover side housing 12 will be described. As shown in FIG. 1, the front end portion of the main body side housing 11 is inclined backward from the vertical direction in a side view. Hereinafter, the direction in which the front end portion is inclined is referred to as an inclination direction B. The inclination direction B is substantially orthogonal to the motor inclination direction A. As shown in FIG. 3, the exhaust port portion 11 a is formed in each of the left and right directions. Since both have substantially the same configuration, only one exhaust port portion 11 a will be described below. The exhaust port portion 11 a is formed in the radial direction outward of the fan 3 and the switching unit 31 in parallel with the tilt direction B. Specifically, as shown in FIGS. 5A and 5B, the exhaust port portion 11a is formed over about 90 ° with the output shaft 22 as the center. The exhaust port portion 11a is formed at a position overlapping the fan 3 in a side view, and the fan 3 is positioned in the vicinity of the exhaust port portion 11a, so that the exhaust from the fan 3 is exhausted with a low flow resistance. It is discharged from the mouth portion 11a to the outside. Thereby, a strong suction force can be secured in the suction mode.

  As shown in FIG. 7, the exhaust port portion 11 a includes a long hole 11 b that extends in the tilt direction B and from which the knob 32 protrudes, and a plurality of exhaust holes 11 c that are formed along the tilt direction B. By forming the long hole 11b, a space for operating the knob 32 can be secured, and a wide opening area of the exhaust port portion 11a can be secured. A plurality of rib portions 11D are defined between the long holes 11b and the exhaust holes 11c and between the exhaust holes 11c. By defining the rib portion 11D, the exhaust port portion 11a can suppress a decrease in strength of the main body side housing 11 while ensuring a wide opening area.

  A first wall portion 14 and a second wall portion 15 that guide the air discharged from the fan 3 while supporting the motor 2 are defined in the main body side housing 11. The first wall portion 14 extends linearly from the body portion 21 of the motor 2 and the fan 3 toward the radially outward direction of the output shaft 22 and guides the air from the fan 3 radially outward. Yes. For this reason, there is no space where the air discharged from the fan 3 stays in the vicinity of the first wall portion 14, and an increase in flow path resistance due to vortices generated in the space is suppressed.

  The second wall portion 15 is a part of the lower surface of the body-side housing 11 and is connected to the first wall portion 14 and intersects the first wall portion 14, specifically, a substantially horizontal direction (front-rear direction). It extends to. The first wall portion 14 and the second wall portion 15 constitute a passage portion 15 a that guides the air from the fan 3 from the radial direction of the fan 3 in a substantially horizontal direction. By the passage portion 15a, the air discharged radially outward from the fan 3 is bent at a substantially right angle and guided forward. Since the second wall portion 15 intersects the first wall portion 14 in a substantially horizontal direction, the space where the air discharged from the fan 3 stays near the connection portion between the first wall portion 14 and the second wall portion 15. The flow resistance is suppressed from increasing due to the vortex generated in the space.

  The suction port 12a is formed at the front end of the cover-side housing 12 and opens forward. The suction port 12a forms a through hole that communicates the inside and the outside of the cover-side housing 12. The suction port 12 a communicates with the space around the fan 3 through the dust collection filter 5.

  The air blowing pipe portion 16 is formed of a member different from the cover-side housing 12, and is attached and fixed to the cover-side housing 12 with screws 17. The air blowing pipe portion 16 constitutes a part of the housing 10. The outlet 16a corresponds to the air outlet of the present invention. The suction port 12a corresponds to the air suction port of the present invention.

  At one end of the air blowing pipe portion 16, there is formed a blowing port 16 a that is arranged adjacent to the suction port 12 a and opens forward, and at the other end, the cover side housing 12 is fixed to the main body side housing 11. When in communication with the passage portion 15a. In the air blowing pipe portion 16, a straight pipe line 16b connecting one end and the other end is formed. Since the pipe 16b guides the air guided from the fan 3 by the first wall portion 14 and the second wall portion 15 to the blowout port 16a in a straight line, the flow path when the air is blown out from the blowout port 16a. Resistance is reduced.

  As shown in FIG. 2, a rubber lid 18 having a disk shape substantially the same shape as the suction port 12a is provided in the cover-side housing 12 and in the vicinity of the suction port 12a. The upper end of the peripheral edge of the lid portion 18 is supported by the cover-side housing 12 and can be rotated around the supported portion. The lid 18 is biased by a spring (not shown) so that the suction port 12a is closed as shown in FIG. 2 when no force is applied to the lid 18 from the outside. When the user of the handheld cleaner 1 operates the trigger 13 and the fan 3 starts to rotate, the inside of the cover-side housing 12 becomes negative pressure, and the lid 18 rotates to open the suction port 12a. ing.

  Next, the operation of the handheld cleaner 1 will be described. When a strong suction force is required, the user of the hand-held cleaner 1 pinches the knob 32 and rotates the switching unit 31 to obtain the state (suction mode) shown in FIG. When the user pulls the trigger 13, the motor 2 is driven to rotate and the fan 3 rotates. As a result, air flows in from the suction port 12 a, dust collected together with the air is captured by the dust collection filter 5, and only air flows into the fan 3. The air from the fan 3 passes through the vent portion 31a and the exhaust port portion 11a of the switching portion 31 and is discharged to the outside of the main body side housing 11 as indicated by an arrow in FIG. In the suction mode, all of the air flowing into the cover-side housing 12 from the suction port 12a is discharged from the exhaust port portion 11a.

  When performing a blower that blows out air from the blowout port 16a, the user operates the knob 32 to rotate the switching unit 31 so that the state (blower mode) shown in FIG. When the user pulls the trigger 13, the motor 2 is driven to rotate and the fan 3 rotates. As a result, air flows from the suction port 12 a, passes through the dust collection filter 5, and flows into the fan 3. The air from the fan 3 passes through the vent portion 31a of the switching portion 31 as shown by an arrow in FIG. 5B, flows through the passage portion 15a and the conduit 16b, and is blown out from the blowout port 16a. In the blower mode, all of the air that has flowed into the cover-side body from the suction port 12a is blown out from the blowout port 16a.

  If the user wants to reduce the amount of air blown from the outlet 16a, the user operates the knob 32 to rotate the switching unit 31 counterclockwise by about 45 ° from the state shown in FIG. The state shown in FIG. 5 (a) is intermediate to the state shown in FIG. 5 (b). As a result, the vent portion 31a faces the exhaust port portion 11a and communicates with the passage portion 15a. When the user pulls the trigger 13, the motor 2 is driven to rotate and the fan 3 rotates. As a result, air flows from the suction port 12 a, passes through the dust collection filter 5, and flows into the fan 3. Part of the air from the fan 3 is blown out from the outlet 16a through the passage portion 15a and the pipe line 16b. The remaining part of the air is discharged from the exhaust port 11a to the outside of the main body side housing 11. In this case, a part of the air that has flowed into the cover-side body from the suction port 12a is blown out from the blowout port 16a, so that the amount of blown air is weakened and the remaining air is discharged from the exhaust port portion 11a. Therefore, the suction force is improved.

  In the three cases described above, the flow path of the air until the air that has flowed in from the suction port 12a is discharged from the blowout port 16a or the exhaust port portion 11a corresponds to an air passage.

  According to such a configuration, the air from the fan 3 is guided radially outward by the first wall portion 14 and guided to the outlet 16a substantially linearly by the second wall portion 15 intersecting the first wall portion 14. Therefore, there is no space in which air stagnates at the intersection of the first wall portion 14 and the second wall portion 15, and the generation of vortices at that location is suppressed. Thereby, the flow path resistance when air is blown from the blowout port 16a is reduced, and the suction force can be increased. Further, since the second wall portion 15 guides the air to the blowout port 16a in a straight line, the flow path resistance can be further reduced.

  Moreover, the suction mode and the blower mode can be switched by switching the switching unit 31. Thereby, the handheld cleaner 1 which can switch a mode according to a use can be provided.

  Further, since the exhaust port portion 11a is formed radially outward of the fan 3, the exhaust resistance in the suction mode is reduced and the suction force is increased. Thereby, the improvement of a suction work rate can be aimed at.

  Further, since the opening area of the exhaust port portion 11a is larger than the opening area of the air outlet 16a, the suction force is higher in the suction mode than in the blower mode in which air is discharged from the air outlet 16a. Thereby, the improvement of the suction work rate at the time of suction mode can be aimed at.

  The hand-held cleaner of the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims.

  In the above-described embodiment, the air blowing pipe portion 16 is separated from the cover-side housing 12, but may be provided integrally with the cover-side housing 12.

  In the above-described embodiment, the first wall portion 14 and the second wall portion 15 intersect, but a round may be provided at the intersecting location. As a result, the flow path resistance can be further reduced.

DESCRIPTION OF SYMBOLS 1 ... Hand-held cleaner 2 .... Motor 3 .... Fan 4 .... Battery pack 5 .... Dust collection filter 11 .... Main body side housing 11a ... Exhaust port 12 .... Cover side housing 13 ... Trigger 14 ... 1st wall part 15 .. 2nd wall part 16 .. Air blowing pipe part 16a .. Blowing port 21 .. Main body part 22 .. Output shaft

Claims (4)

A housing in which an air blowing port, an air suction port, and an air passage connecting the air blowing port and the air suction port are formed;
A motor housed in the housing and having a main body portion and an output shaft protruding from the main body portion;
A fan disposed in the air passage, fixed to the output shaft and driven to rotate by the motor;
A dust collection filter provided in the air passage and between the fan and the air suction port,
The air passage supports the motor and extends radially outward of the output shaft from between the main body and the fan, thereby guiding air from the fan outward in the radial direction. And a second wall portion connected to the first wall portion and extending in a direction intersecting the first wall portion to guide the air from the fan to the air outlet substantially linearly. Hand-held cleaner. The housing is formed with an air exhaust port for discharging at least part of the air sucked into the air passage from the air suction port to the outside of the air passage,
The hand-held cleaner according to claim 1, further comprising a switching unit that switches discharge of the air that has flowed into the air passage between the air exhaust port and the air outlet.   The hand-held cleaner according to claim 2, wherein the air exhaust port is formed radially outward of the fan.   The hand-held cleaner according to any one of claims 1 to 3, wherein an opening area of the air exhaust port is larger than an opening area of the air outlet port.

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