AU2010347851A1

AU2010347851A1 - Suction nozzle for vacuum cleaner

Info

Publication number: AU2010347851A1
Application number: AU2010347851A
Authority: AU
Inventors: Jung Bae Hwang; Mantae Hwang
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2010-03-10
Filing date: 2010-03-10
Publication date: 2012-09-06
Anticipated expiration: 2030-03-10
Also published as: CN102770057B; CN102770057A; KR20120065380A; AU2010347851B2; KR101414658B1; WO2011111882A1

Abstract

The present invention relates to a suction nozzle for a vacuum cleaner, which comprises: a case member, which has suction holes to aspirate dust and inlet holes through which air is let in; a rotary member, which is provided in the case member and rotates by the air that is let in through the suction holes and the inlet holes; a power transmission member, which transforms the rotary movement of the rotary member to a linear reciprocating motion; and a punching member, which connects to the power transmission member, wherein the power transmission member includes a cam shaft, which is coupled to the rotary member, and has a phase difference therebetween, and a cam, which connects to the cam shaft. The present invention increases vibrating force and amount and prevents noise occurrence during cleaning.

Description

OPP-AZ-2010-0014-WO-00 [DESCRIPTION] [TITLE] SUCTION NOZZLE FOR VACUUM CLEANER [TECHNICAL FIELD] [0001] Embodiments of the invention may relate to a suction nozzle for a vacuum cleaner, more particularly, to a suction nozzle for a vacuum cleaner that includes cam shafts of a power transmission member provided therein, with a phase difference. [0002] [BACKGROUND] [0003] Generally, a vacuum cleaner is an electric appliance that filters dust and foreign substances sucked in a case together with air by using a suction motor mounted in a case thereof. [0004] The vacuum cleaner having such a function may be classified into a canister type having a nozzle part as an inlet that communicates with a case via a connection pipe and an upright type having a nozzle part integrally formed with a case. [0005] The canister type vacuum cleaner includes a vacuum cleaner case where a suction motor for generating a suction force is mounted, a suction nozzle for sucking dust and foreign substances placed on a surface which will be cleaned by using the suction force generated in the cleaner case, an OPP-AZ-2010-0014-WO-00 extension pipe and a connection pipe for connecting the case and the suction nozzle with each other. [0006] In other words, when the suction motor is driven by an electric power applied to the case of the vacuum cleaner, the suction force is generated and such the suction force sucks the air having the dust and foreign substances located on the surface that is an object of cleaning. The air having the dust and foreign substances sucked into the cleaner case is circulating in the case and the dust and foreign substances are separated. The separated dust and foreign substances are stored in the cleaner case and the air having the dust and foreign substances separated there from is exhausted outside the cleaner case. [0007] Meanwhile, the vacuum cleaner may be used in cleaning the cleaning-object surface of a carpet or bedding such as a sheet and a cover. Fiber materials containing fine dust and foreign substances are provided in the carpet or the bedding. [0008] Accordingly, a conventional vacuum cleaner a mechanism provided in a suction nozzle to press a cleaning object surface to whisk off the dust and foreign substances such that the fine dust and foreign substances located on the cleaning-object surface of the carpet or bedding may be sucked into the cleaner case smoothly. 2 OPP-AZ-2010-0014-WO-00 [0009] However, the amount and force of vibration may be lessened by the mechanism for whisk off the dust and foreign substances. Accordingly, there is a defect of poor scattering with respect to the fine dust and foreign substances located on the cleaning-object surface of the carpet or bedding. [0010] Especially, 110V is supplied to an electric appliance such as a vacuum cleaner in the North American. Accordingly, the RPM (revolutions per fine) of the suction motor provided in the cleaner case in the vacuum cleaner in the North American is smaller than that of the suction motor in the vacuum cleaner herein South Korea and there is another defect of poor fan performance. [0011] In addition, when the fan of the mechanism for whisking the dust and foreign substances performs a revolution, a cam performs a single vertical reciprocation movement. Accordingly, the vibration amount of the device for whisking off dust and foreign substances might be small disadvantageously. [0012] Meanwhile, the mechanism for whisking off dust and foreign substances is vibrated on a outer surface of a suction nozzle provided in the vacuum cleaner. Accordingly, the mechanism might collide with the suction nozzle in cleaning and a noise might be generated. [0013] [DISCLOSURE] 3 OPP-AZ-2010-0014-WO-00 [TECHNICAL PROBLEM] [0014] To solve the problems, an object of the invention is to provide a suction nozzle for a vacuum cleaner including a case member, a rotary member, a power transmission member and a punching member, which enhances a cleaning ability by increasing the vibration force and the amount of the punching member to brush dust and foreign substances. [0015] Additional advantages, objects, and features of the disclosure will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. [0016] [TECHNICAL SOLUTION] [0017] To achieve these objects and other advantages and in accordance with the purpose of the embodiments, as embodied and broadly described herein, a suction nozzle for a vacuum cleaner includes a case member comprising a suction hole for sucking dust and an inlet hole for drawing air; a rotary member provided in the case member to be rotated by the air drawn via the suction hole and the inlet hole; a power transmission member configured to convert the rotation movement of the rotary member into a linear reciprocation movement; and a punching member connected with the power transmission member, wherein the power transmission member 4 OPP-AZ-2010-0014-WO-00 comprises a cam shaft coupled to the rotary member, with a phase difference, and a cam connected with the cam shaft. [0018] [ADVANTAGEOUS EFFECTS] [0019] The embodiments have following advantageous effects. According to the invention, the first cam shaft and the second cam shaft are coupled to the ends of the rotary member provided in the suction nozzle, with a phase difference. When the fan of the rotary member performs one rotation, the first cam and the second cam perform vertical reciprocation movement with a time difference. Accordingly, the vibration amount of the punching member may be increased. [0020] Furthermore, the cams are arranged in both ends of the rotary member, to remove the dead space formed in the center of the fan. Accordingly, the vibration force of the punching member may be enhanced. [0021] Still further, the noise reduction material provided in the punching member and the cavity formed in the case member may prevent the noise generated by the collision between the punching member and the case member during the cleaning. [0022] [BRIEF DESCRIPTION OF THE DRAWINGS] [0023] FIG. 1 is a perspective view illustrating a vacuum cleaner according to an embodiment of the invention; 5 OPP-AZ-2010-0014-WO-00 [0024] FIG. 2 is an exploded perspective view of the embodiment; [0025] FIG. 3 is a perspective view illustrating a coupling relation among a case member, a rotation member and a power transmission member according to the embodiment of the invention; [0026] FIG. 4 is an exploded perspective view illustrating the rotary member and the power transmission member according to the embodiment of the invention; [0027] FIGS. 5 and 6 are diagrams illustrating an operation of a punching member according to the embodiment of the invention; [0028] FIG. 7 is a side view illustrating a cam shaft and a cam according to the embodiment of the invention; [0029] FIG. 8 is a perspective view illustrating the cam shaft and the cam according to the embodiment of the invention; [0030] FIG. 9 is a perspective view of the embodiment of the invention; [0031] FIG. 10 is a side sectional view illustrating suction of dust according to the embodiment of the invention; and [0032] FIG. 11 is a perspective view illustrating an inside of an upper portion of the case member. [0033] 6 OPP-AZ-2010-0014-WO-00 [BEST MODE] [0034] Embodiments of the present invention will be described in detail in reference to the accompanying drawings and contents disclosed in the drawings and the present invention is not limited to the embodiments. The sizes and shapes of elements shown in the drawings may be exaggerated for clarity and convenience of description. Furthermore, terminology used in the present specification selects common expressions well known and used currently, and the terminology may be varied by intensions of those who skilled in the air the present invention pertain to, practices or emergence of new technologies. In a specific case, there may be terminology selected by the applicant of the present specification on his or her own discretion and meaning of corresponding terminology will be described in the detailed description. As a result, the terminologies used in the present specification has to be understood based on substantial meaning possessed thereby and contents of the specification, not based on simple titles of the terminologies. [0035] It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Thus, it is intended that the present invention covers the modifications and variations of this 7 OPP-AZ-2010-0014-WO-00 invention provided they come within the scope of the appended claims and their equivalents. [0036] [0037] FIG. 1 is a perspective view illustrating a vacuum cleaner according to an embodiment of the invention. In reference to FIG. 1, the structure and operation of the vacuum cleaner will be described in detail. [0038] The vacuum cleaner shown in FIG. 1 includes a case 30 having a suction motor mounted therein to generate a suction force, a connection part 20 for transmitting the suction force generated in the case 30 and a suction nozzle 10 provided in an end of the connection part 20 to suck dust and foreign substances scattered on a surface which will be cleaned (hereinafter, a cleaning-object surface, together with air. [0039] The suction motor is mounted in the case 30. When the suction motor is driven, the suction force is generated and dust and foreign substances together with air are sucked into the case 30. The sucked dust and foreign substances are filtered in the case 30. [0040] The connection part 20 may be configured of an extendable pipe- 22 having an adjustable length, with an end where the suction nozzle 10 is coupled and a connection pipe 24 for connecting the extended pipe 22 and the case 30 with each other. The extendable pipe 22 may be extendable based on 8 OPP-AZ-2010-0014-WO-00 the user's height and a location of the surface which will be cleaned. [0041] During the cleaning, the suction nozzle 10 connected to the extendable pipe 22 may be moving in all directions with respect to the surface which will be cleaned. Accordingly, the connection pipe 24 may be formed of a flexible material to enable the user to perform cleaning smoothly. [0042] [0043] FIG. 2 is an exploded perspective view of the embodiment. FIG. 3 is a perspective view illustrating a coupling relation among a case member, a rotary member and a power transmission member according to the embodiment of the invention. FIG. 4 is an exploded perspective view illustrating the rotary member and the power transmission member according to the embodiment of the invention. In reference to FIGS. 2 to 4, the suction nozzle will be described in detail. [0044] The suction nozzle 10 may by defined by a case member 100. The case member 100 may be integrally formed as one body or it may include an upper case 102 and a lower case 104 that are coupled to each other. A joint portion 26 is provided in a rear end, with a predetermined diameter corresponding to a diameter of the extendable pipe 22 to 9 OPP-AZ-2010-0014-WO-00 insertedly couple the joint portion 26 to the extendable pipe 22. [0045] Meanwhile, a dust collection visualization mechanism 500 may be provided adjacent to the case member 100 to visualize a collection state of foreign substances, with located at an end of a transmission passage of the suction force generated in the case 30. [0046] In other words, the dust collection visualization mechanism 500 may partially accommodate the air collected via the suction nozzle 10 and the dust and foreign substances contained in the air to make an accommodation state of the dust visible outside. The dust collection visualization mechanism 500 may partially close a passage of the air moving to the case 30. [0047] Accordingly, a predetermined amount of the air moving to the case 30 may be drawn into the dust visualization mechanism 500. [0048] The suction nozzle 10 shown in FIG. 2 shows the case member 100, the rotary member 200, the power transmission member 300, the punching member 400 and the dust visualization mechanism 500 in detail. [0049] As mentioned above, the case member 100 defines an overall appearance of the suction nozzle 10. The rotary member 200 and the power transmission member 300 may be provided in the case member 100. The punching member 400 may 10 OPP-AZ-2010-0014-WO-00 be connected with the power transmission member 300 at an outer back side of the case member 100. [0050] The suction nozzle 10 may suck dust and foreign substances, while moving in back/forth and right/left directions with respect to the cleaning-object surface. Accordingly, the rotary member 200 and the power transmission member 300 provided in the case member 100 may be fixed to prevent separation thereof. [0051] As a result, according to the embodiment, a separation prevention material 140 may be formed in the case member 100 to surround and fix the rotary member 200 and the power transmission member 300. [0052] The suction nozzle 10 may suck dust and foreign substances together with air, using the suction force of the motor mounted in the case 30. Accordingly, a suction hole 110 and an inlet hole 120 are formed in the case member 100 to suck the dust and foreign substances together with the air. [0053] The suction hole 110 may be integrally formed with a lower surface of the case member 100 or it may be independently. When the suction nozzle 10 performs suction with respect to the cleaning-object surface, dust and foreign substances scattered on the cleaning-object surface via the suction hole 110, together with air. [0054] The inlet hole 120 may be formed through the upper case 102 and it may suck air to rotate the rotary member 200. 11 OPP-AZ-2010-0014-WO-00 According to the embodiment, as an area where the air is drawn is getting smaller, the velocity of the air inlet may be getting higher. Accordingly, the inlet hole 120 may be formed in a shape of a horizontal direction slot. [0055] The position of the inlet hole 120 may be corresponding to the position of the rotary member 200 to ease the air suction. According to the embodiment, the inlet hole 120 may be positioned upper or lower with respect to a horizontal center of the rotary member 200 to rotate the rotary member 200 in a predetermined direction. (0056] The rotary member 200 may be rotatably provided in the case member 100. In other words, the rotary member 200 may be provided in the case member 100 and it may be rotated by the air sucked via the suction hole 110 and the inlet hole 120 that are formed in the case member 100. [0057] The rotary member 200 includes a fan 210 having a plurality of blades 212 and a rotation shaft 220 coupled to a rotation shaft of the fan 210 thoroughly. [0058] The fan 210 includes the plurality of the blades 212 and disk members 214 provided in both opposite ends of the blades. [0059] The plurality of the blades 212 may be arranged between the disk members 214 along a circumferential direction of the rotation shaft of the fan 210, spaced apart a predetermined distance from each other. Each of the blades 12 OPP-AZ-2010-0014-WO-00 212 may have a shape of a rectangle with a gentle curvature. The blades 212 are arranged to collide concave surfaces thereof with the air drawn via the inlet hole 120 to enhance a rotation ability of the fan 210. [0060] Meanwhile, the disk members 214 may be formed in both opposite ends of the blades 212, respectively, to enable the drawn air to rotate the rotary member 200 effectively. [0061] In other words, the disk member 214 may prevent the air sucked via the inlet hole 120 from being exhausted in a lateral direction with respect to the blades 212 after collided with the blades 212, such that the rotation of the rotary member 200 may be performed efficiently. [0062] Meanwhile, according to the embodiment, the rotation shaft 220 is a shaft of the fan 210 and it may be passing through a center of the fan 210. [0063] The power transmission member 300 is provided in the case 100 together with the rotary member 200. The power transmission member 300 includes a cam shaft 310 and a cam 320. The power transmission member 300 converts the rotation movement of the rotary member 200 into a linear reciprocation movement. [0064] In other words, when the fan 210 of the rotary member 200 is rotated by the air sucked into the suction nozzle 10, the cam shaft 310 and the cam 320 of the power 13 OPP-AZ-2010-0014-WO-00 transmission member 300 convert the rotation movement into the vertically linear reciprocation movement. [0065] Accordingly, the punching member 400 connected with the power transmission member 300 is vibrated, which will be described later in detail when the operation of the punching member 400 is described. [0066] The cam shaft 310 is provided along both ends of the rotary member 200. In other words, conventionally, a single cam 320 is provided to receive a power from the fan 210 of the rotation member 200 and it is connected with a center of the fan 210. Accordingly, a space where the cam 320 is connected with the fan 210 may be dead and the blades 212 are not formed therein. [0067] However, the cam shaft 310 is provided along both ends of the rotary member 200 in the suction nozzle 10 according to the embodiment of the invention, only to remove the dead space where the blades 212 are not formed. Accordingly, the rotation number and the rotation force of the fan 210 may be increased enough to enhance the ability of the fan 210 remarkably. [0068] Meanwhile, the cam shaft 310 connected with the rotary member 200 may be coupled to a supporting material 316 supporting the cam shaft 310, such that the rotary member 200 may be mounted in the case member 100 to rotate stably. 14 OPP-AZ-2010-0014-WO-00 (0069] The cam 320 may be provided along both ends of the rotary member 200 to connect the cam shaft 310 and the punching member 400 with each other, similar to the cam shaft 310. Accordingly, the cam 320 may transmit the power to the punching member 400 from the fan 210 of the rotary member 200. [0070] The punching member 400 may be connected with the power transmission member 300 to press the cleaning-object surface to make fine dust and foreign substances sucked into the case 30 of the vacuum cleaner from the cleaning-object surface of the carpet or the bedding such as or sheets and covers smoothly. [0071] In other words, when the punching member 400 presses the surface repeatedly, the fine dust and foreign substances are scattered and the scattered dust and foreign substances are sucked via the suction hole 110 formed in the case member 100. [0072] FIG. 3 is the perspective view illustrating the coupling relation among the case member 100, the rotary member 200 and the power transmission member 300. FIG. 4 is an exploded perspective view illustrating the rotary member 200 and the power transmission member 300. The coupling relation of the suction nozzle 10 will be described as follows. [0073] First of all, the rotation shaft (220, see FIG. 2) is coupled to the fan 210, passing through the fan 210. The 15 OPP-AZ-2010-0014-WO-00 cam shaft310 having the can 320 connected thereto is coupled to both ends of the fan 210. At this time, both ends of the rotation shaft 220 are also coupled to the cam shaft 310, passing through the rotation shaft 220. [0074] The cam shaft 310 connected with the rotary member 200 may be coupled to the supporting material 316 supporting the rotary member 200 and the power transmission member 300. [0075] Hence, after coupled to the power transmission member 300, the supporting material 316 is coupled to the case member 100. The rotary member 200, the power transmission member 300 and the supporting material 316 may be fixed by the separation prevention material 140 formed in the case member 100. [0076] A coupling portion 324 of the cam 320 is projected in a downward direction with respect to the case member 100, passing through a through hole (not shown) formed in the lower surface of the case member 100. When the punching member is coupled to the coupling portion 324 of the cam 320 projected to a lower portion of the case member 100 from the lower portion of the case member 100, the coupling of the suction nozzle 10 may be complete. [0077] [0078] FIGS. 5 and 6 are diagrams illustrating a usage state of the punching member according to the embodiment of the invention. FIG. 7 is a side view illustrating the cam 16 OPP-AZ-2010-0014-WO-00 shaft and the cam according to the embodiment of the invention. FIG. 8 is a perspective view illustrating the cam shaft and the cam according to the embodiment of the invention. In reference to FIGS. 5 to 8, the operation process of the suction nozzle according to the prevent invention will be described in detail. [0079] As shown in FIGS. 5 and 6, the cam shaft 310 is coupled to the rotary member 200 to have a phase difference. In other words, a first cam shaft 310a coupled to an end of the rotary member 200 and a second cam shaft 310b coupled to the other end of the rotary member 200 are arranged to have a phase difference. A first cam 310a and a second cam 320b provided in the power transmission member 300 are connected with the first cam shaft 310a and the second cam shaft 310b, respectively. [0080] As mentioned above, two cams 320 are provided in both ends of the fan 210 and the dead space where the blades 212 are not formed can be removed in the fan 210. Accordingly, the vibration force of the punching member 400 may be enhanced. [0081] Moreover, according to the embodiment of the invention, when centers of the first cam shaft 310a and the second cam shafts 310b are opposite to each other with respect to the rotation shaft of the fan 210, the vibrating distance of the punching member 400 may be the farthest. The 17 OPP-AZ-2010-0014-WO-00 phase difference between the first cam shaft 310a and the second cam shaft 310b may be 1800. [0082] The cam shaft 310 includes a fixing portion 312 coupled to the supporting material 316 supporting the rotary member 200 and a hooking portion 314 for hooking the cam 320 thereto. The cam 320 includes a ring portion 322 having the hooking portion 312 inserted therein and a coupling portion 324 coupled to the punching member 400. [0083] A hole 412 is formed in the punching member 400 to insert the coupling portion 324 therein to couple the punching member 400 and the cam 320 to each other. [0084] Meanwhile, centers of the first cam shaft 310a and the second cam shaft 310b are spaced apart a predetermined distance from the shaft of the fan 210. [0085] According to the embodiment of the invention, the center of the cam shaft 310 is spaced apart a predetermined distance from the rotation shaft of the fan 210 and the punching member 400 is vibrating. Accordingly, the center of the cam shaft 310 and the rotation shaft of the fan 210 may be spaced apart a half of the reciprocation movement distance performed by the cam 320 from each other. [0086] As a result, in an initial state of the operation of the suction nozzle 10 shown in FIG. 5, the center of the first cam shaft 310a is spaced apart a predetermined distance from the rotation shaft of the fan 20 to be positioned above 18 OPP-AZ-2010-0014-WO-00 the rotation shaft of the fan 210 and the center of the second cam shaft 310b having a phase difference of 180* is spaced apart a predetermined distance from the shaft of the fan 210 to be positioned below the rotation shaft of the fan 210. [0087] Accordingly, the first cam 320a connected with the hooking portion 314 of the first cam shaft 310a is positioned higher than the cam 320 connected with the hooking portion 314 of the second cam shaft 310b by as the distance of the reciprocation movement performed by the cam 320. The punching member 400 coupled to the cam 320 may be getting inclined in a downward direction from the end connected with the first cam shaft 310a toward the other end connected with the second cam shaft 310b. (0088] In this state, when the first cam shaft 310a and the second cam shaft 310b are rotated 1800 as shown in FIG. 6, the center of the first cam shaft 310a is distant apart a predetermined distance from the rotation shaft of the fan 210 to be positioned below the rotation shaft of the fan 210, in contrast to the initial operation state of the suction nozzle 10 shown in FIG. 5 and the center of the second cam shaft 310b having the phase difference of 1800 with respect to the first cam shaft 310a is spaced apart a predetermined distance from the rotation shaft of the fan 210 to be positioned above the rotation shaft of the fan 210. 19 OPP-AZ-2010-0014-WO-00 [0089] In other words, the first cam 320a connected with the hooking portion 314 of the first cam shaft 310a is moving down as far as the distance of the reciprocation movement, compared with the second cam 320b connected with the hooking portion 314 of the second cam shaft 310b. The end of the punching member 400 connected with the first cam shaft 310a presses the cleaning-object surface. [0090] Meanwhile, the other end of the punching member 400 connected with the second cam shaft 310b in a state of contacting with the cleaning-object surface is moving up as far as the distance of the reciprocation movement performed by the cam 320, to be spaced apart from the cleaning-object surface. [0091] Accordingly, when the fan 210 performs one rotation, the end and the other end of the punching member 400 connected with the first cam 320a and the second cam 320b, respectively, perform the vibration movement of pressing the cleaning-object surface alternatively at a time difference, such that a cleaning effect may be enhanced twice as much, compared with the cleaning effect generated by the conventional vacuum cleaner. [0092] In reference to FIGS. 7 and 8, the hooking portion 314 of the cam shaft 310 is inserted in the ring portion 322 of the cam 320 to be connected with the cam 320. The hooking portion 314 of the cam shaft 310 and the ring portion 322 of 20 OPP-AZ-2010-0014-WO-00 the cam 320 may be insertedly connected with each other loosely. [0093] Accordingly, when the suction nozzle 10 is operated, the ring portion 322 of the cam 320 performs a sliding movement with respect to the hooking portion 314 of the cam shaft 310, to prevent the noise generated by the contact between the cam shaft 310 and the cam 320. [0094] Meanwhile, in FIGS. 7 and 8, the hooking portion 314 of the cam shaft 310 is formed in a cylinder projected from the fixing portion 312 of the cam shaft 310. The shape of the hooking portion 314 is not limited thereto and it may be cylindroids-shaped. [0095] [0096] FIG. 9 is a perspective view of the embodiment according to the invention. The punching member according to the invention will be described in detail in reference to FIG. 9. [0097] The punching member 400 is provided in the suction nozzle 10 to press the cleaning-object surface repeatedly. [0098] The punching member 400 strikes the cleaning-object surface to separate and scatter dust and foreign substances from the cleaning-object surface and to suck the separated foreign substances into the suction hole of the suction nozzle 10 smoothly. 21 OPP-AZ-2010-0014-WO-00 [0099] The punching member 400 includes a striking material 410 for pressing the cleaning-object surface repeatedly and a noise reduction material 420 provided in each end of the striking material 410. [00100] According to the embodiment, the striking material 410 may be a rectangular plate. When the cleaning-object surface is a fiber sheet or carpet, corners of the striking material 410 may be rounded to prevent the fiber surface from being torn by the striking material 410. [00101] Also, a hole 412 is formed in an upper surface of the striking material 410 to insert the coupling portion 324 of the cam 320 therein. The coupling portion 324 of the cam 320 is inserted in the hole 412 of the striking material 410, the punching member 400 may be connected with the power transmission member 300. [00102] The noise reduction material 420 is configured to prevent the noise generated when the punching member 400 is pressing the cleaning-object surface and it may be formed of an elastic material. [00103] As mentioned above, the corners of the striking material 410 may be rounded and ends of the noise reduction material 420 may be also rounded, corresponding to the corners of the striking material 420. [00104] The punching member 400 coupled to the cam 320 includes the end connected with the first cam 320a and the 22 OPP-AZ-2010-0014-WO-00 other end connected with the second cam 320b. The ends perform the vibration movement for pressing the cleaning object surface at a time difference alternatively, such that the ends of the striking material 410 may strike the cleaning-object surface. [00105] Accordingly, to prevent the noise generation, the noise reduction materials 420 may be provided at both ends of the striking material 410. [00106] The punching member 400 is configured to separate dust and foreign substances, pressing the cleaning-object surface. A projected portion 430 is formed in the punching member 400 to ease the contact with the cleaning-object surface. [00107] In other words, the projected portion 430 is projected from the striking material 410 and the noise reduction material 420 to make the punching member 400 contact with the cleaning-object surface. The projected portion 430 may be approximately hemispheric-shaped. To improve the cleaning effect, a plurality of projections may be further provided in the projected portion 430. [00108] Meanwhile, in reference to FIG. 3, a cavity 130 is formed in a lower surface of the case member 100 to avoid the striking material 410. [00109] The punching member 400 is connected with the power transmission member 300 mounted in the case member 100 from 23 OPP-AZ-2010-0014-WO-00 the lower surface of the lower case 104. Noise might be generated when the punching member 400 presses the cleaning object surface and even when the punching member 400 collides with an outer surface of the case member 100. [00110] Accordingly, the cavity 130 is provided in the lower surface of the case member 100 to prevent the collision between the striking material 410 and the case member 100 during the vibration movement of the punching member 400. [00111] The cavity 130 is formed in a recessed portion recessed from the lower surface of the case member 100. [00112] As mentioned above, the punching member 400 coupled to the cam 320 in an initial state of the operation performed in the suction nozzle 10 is inclined in a downward direction from the end connected with the first cam 320a toward the other end connected with the second cam 320b. When the fan 210 performs one rotation, the end and the other end of the punching member 400 connected with the first cam 320a and the second cam 320b, respectively, perform the vibration movement for alternatively pressing the cleaning-object surface at a time different. [00113] The cavity 130 is inclined toward an upper portion of the case member 100 as coming to longitudinal ends from a center of the striking material 410. [00114] Meanwhile, a through hole is formed in the lower surface of the case member 100 to pass the coupling portion 24 OPP-AZ-2010-0014-WO-00 324 there through. The coupling portion 324 of the cam 320 passes through the through hole formed in the lower surface of the case member 100, to be coupled to the punching member 400. [00115] When the punching member 400 performs the vibration movement, noise is generated even when the coupling portion 324 of the cam 320 collides with the through hole of the case member. [00116] Accordingly, a through material 150 is provided in the through hole to elastically support the coupling portion 324 to prevent the collision between the coupling portion 324 of the cam 320 and the through hole. [00117] [00118] FIG. 10 is a side sectional view illustrating suction of dust according to the embodiment of the invention; and FIG. 11 is a perspective view illustrating an inside of an upper portion of the case member. In reference to FIGS. 10 and 11, the suction hole and the inlet hole according to the invention will be described in detail. [00119] As mentioned above, the suction nozzle 10 sucks dust and foreign substances by using the suction force of the suction motor mounted in the case (30, see FIG. 1), together with air. The suction hole 110 and the inlet hole 120 are formed in the case member 100 to suck the dust and foreign substances together with air. 25 OPP-AZ-2010-0014-WO-00 [00120] According to the embodiment, the suction hole 110 may be integrally formed with the lower surface of the case member 100 to suck therein the dust and foreign substances scattered by the pressing of the punching member 400 provided in the outer lower surface of the case member 100. [00121] The suction hole 110 has to be provided adjacent to the punching member 400 to suck the scattered dust directly. [00122] The inlet hole 120 is formed in an upper portion of the case member 100 to suck the air for rotating the rotary member 200. [00123] As mentioned above, as the area where air is drawn is getting smaller, the velocity of air suction is getting higher. For efficient rotation of the rotary member 200, the inlet hole 120 may be formed in a horizontal slot shape. [00124] The position of the inlet hole 120 is corresponding to the position of the rotary member 200. In other words, the inlet hole 120 is facing the fan 210 to ease the air suction. [00125] Also, a guide rib 122 for guiding the air suction is provided in the inlet hole 120 toward the fan 210 mounted in the case member 100, to ease the rotation of the rotary member 200 efficiently. [00126] [00127] It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope 26 OPP-AZ-2010-0014-WO-00 of the inventions. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. 27

Claims

1. A suction nozzle for a vacuum cleaner comprising: a case member comprising a suction hole for sucking dust and an inlet hole for drawing air; a rotary member provided in the case member to be rotated by the air drawn via the suction hole and the inlet hole; a power transmission member configured to convert the rotation movement of the rotary member into a linear reciprocation movement; and a punching member connected with the power transmission member, wherein the power transmission member comprises a cam shaft coupled to the rotary member, with a phase difference, and a cam connected with the cam shaft.

2. The suction nozzle for the vacuum cleaner according to claim 1, wherein the cam shaft comprises a first cam shaft coupled to an end of the rotary member and a second cam shaft coupled to the other end of the rotary member, with being arranged to have the phase difference with respect to the first cam shaft, and the cam comprises a first cam connected with the first cam shaft and a second cam connected with the second cam shaft, and 28 OPP-AZ-2010-0014-WO-00 the phase difference between the first cam shaft and the second cam shaft enables the punching member to perform vibration movement.

3. The suction nozzle for the vacuum cleaner according to claim 1, wherein the phase difference of the cam shaft is

1800.

4. The suction nozzle for the vacuum cleaner according to claim 1, wherein the cam shaft comprises a fixing portion coupled to a supporting material supporting the rotary member and a hooking portion configured to insert the cam therein, and the cam comprises a ring portion configured to insert the hooking portion therein and a coupling portion coupled to the punching member, and the hooking portion and the ring portion are insertedly coupled to each other loosely.

5. The suction nozzle for the vacuum cleaner according to claim 4, wherein the ring portion performs a sliding movement with respect to the hooking portion.

6. The suction nozzle for the vacuum cleaner according to claim 1, wherein the rotary member comprises a fan 29 OPP-AZ-2010-0014-WO-00 comprising a plurality of blades and a rotation shaft passing through a rotation shaft of the fan, and a center of the cam shaft is spaced apart a predetermined distance from the rotation shaft of the fan.

7. The suction nozzle for the vacuum cleaner according to claim 4, wherein the punching member comprises a striking material configured to press a cleaning-object surface repeatedly and a noise reduction material provided in each end of the striking material, and a hole is formed in the striking material to insert the coupling portion of the cam therein.

8. The suction nozzle for the vacuum cleaner according to claim 7, wherein a projected portion is projected from the striking material and the noise reduction material to contact with the cleaning-object surface.

9. The suction nozzle for the vacuum cleaner according to claim 7, wherein the noise reduction material is formed of an elastic material.

10. The suction nozzle for the vacuum cleaner according to claim 7, wherein a cavity is formed in a lower surface of the case member to avoid the striking material to prevent 30 OPP-AZ-2010-0014-WO-00 collision between the striking material and the case member during the vibration movement of the punching member.

11. The suction nozzle for the vacuum cleaner according to claim 10, wherein the cavity is formed in a recessed portion recessed from the lower surface of the case member and the cavity is inclined toward an upper portion of the case member along both longitudinal ends from a center of the striking material.

12. The suction nozzle for the vacuum cleaner according to claim 4, further comprising: a through hole formed in a lower surface of the case member to pass the coupling portion there through; and a through material provided in the through hole to elastically support the coupling portion.

13. The suction nozzle for the vacuum cleaner according to claim 1, wherein the suction hole is integrally formed with a lower surface of the case member where the punching member is provided, to be adjacent to the punching member.

14. The suction nozzle for the vacuum cleaner according to claim 6, wherein the inlet hole is formed to face the 31 OPP-AZ-2010-0014-WO-00 coupling position of the fan and a guide rib is provided in the inlet hole toward the fan. 32