WO2012139488A1 - 用于吸尘器的伸缩管 - Google Patents

用于吸尘器的伸缩管 Download PDF

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Publication number
WO2012139488A1
WO2012139488A1 PCT/CN2012/073706 CN2012073706W WO2012139488A1 WO 2012139488 A1 WO2012139488 A1 WO 2012139488A1 CN 2012073706 W CN2012073706 W CN 2012073706W WO 2012139488 A1 WO2012139488 A1 WO 2012139488A1
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WO
WIPO (PCT)
Prior art keywords
outer tube
gear
tube
locking
ring gear
Prior art date
Application number
PCT/CN2012/073706
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English (en)
French (fr)
Inventor
彭中美
Original Assignee
科沃斯机器人科技(苏州)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 科沃斯机器人科技(苏州)有限公司 filed Critical 科沃斯机器人科技(苏州)有限公司
Publication of WO2012139488A1 publication Critical patent/WO2012139488A1/zh

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/24Hoses or pipes; Hose or pipe couplings
    • A47L9/242Hose or pipe couplings
    • A47L9/244Hose or pipe couplings for telescopic or extensible hoses or pipes

Definitions

  • the invention relates to a telescopic tube, in particular to a telescopic tube for a vacuum cleaner, and belongs to the technical field of vacuum cleaner manufacturing. Background technique
  • Ordinary vacuum cleaner telescopic tube function is relatively simple, because it can not be bent by itself. When cleaning a low place such as a sofa or a bed, if you do not borrow accessories that can be bent or cornered, the user must bend or squat. . Similarly, if the cleaning position is higher than the height of the human arm, for example: cleaning the wardrobe, the top of the bookshelf, etc., if you can not use the accessories that can be bent or cornered, the cleaning nozzle can not touch the surface to be cleaned. This prevents the user from cleaning up and limits the scope of use of the cleaning tool.
  • the technical problem to be solved by the present invention is to provide a bendable telescopic tube for the deficiencies of the prior art, which is simple and compact in structure, realizes the expansion and contraction of the tube body while bending, has a large cleaning range and is convenient to operate.
  • a bendable telescopic tube comprising an inner tube and an outer tube, the inner tube being inserted into the outer tube and slidable and positioned within the outer tube; the outer tube being composed of a first outer tube and a second outer tube, both Connected by a bending mechanism; a cavity for accommodating the pipe body is disposed between the first outer pipe and the second outer pipe; the outer pipe is provided with a retractable hose, and one end of the retractable hose is The inner tube is connected, and the other end is connected to the second outer tube; when the retractable hose is located in the cavity, the first outer tube and the second outer tube are relatively rotated by the bending mechanism.
  • the bending mechanism includes a locking gear, a first ring gear is disposed on both ends of the first outer tube, and a second ring gear is disposed on both ends of the second outer tube, the locking gear clip Provided between the first ring gear and the second ring gear, the locking gear simultaneously meshes with the first ring gear and the second ring gear to lock the first outer tube and the second outer tube; or The locking gear is disengaged from the second ring gear to enable rotation between the first outer tube and the second outer tube.
  • the portion of the first outer tube provided with the first ring gear further includes a first housing, the first housing is spaced apart on both sides of the first outer tube end, and the central portion of the first housing of each side is a partition is provided, the edge of the partition is provided with a recess, and a gap is formed between the inner wall of the cavity of the first casing; a through hole is formed in the partition, and a fixing cap is provided at the through hole of the partition, and the inside of the fixed cap is a top pillar is arranged from the inner side to the outer side in the radial direction of the pipe body, and a top end of the top post is sleeved with a release button spring, and the other end of the release button spring abuts against the convex portion below the bend release button; the edge of the bend release button is Lower extending to form a claw, the end of the claw passes through the recess, adjacent to the side of the locking gear; the end of the claw is further provided with a barb, which is hooked on the first
  • the second outer tube is further provided with a second ring gear, and the second outer casing is spaced apart from the two ends of the second outer tube.
  • the second ring gear ring is disposed on the inner wall of the second housing, and the center of the bottom surface of the second housing is convexly disposed with a positioning post, the positioning post and the positioning
  • the fixed cap is snap-fitted.
  • the locking gear includes a gear body, a plurality of teeth are uniformly disposed on a circumference of the gear body, and a plurality of locking grooves are opened on a side surface of the gear body from a circumferential direction to a center of the circle in a radial direction of the gear body The locking groove cooperates with the first ring gear and the second ring gear to lock or bend the bendable telescopic tube.
  • the locking grooves are four, and each of the two locking grooves formed on the same diameter of the locking gear is a pair, wherein the groove roots of the pair of locking grooves are convexly provided with ribs; the thickness of the ribs is tooth thickness Half, the length of the rib is the same as the length of the locking groove.
  • the acute angle between the adjacent two grooves is in the range of 30°-80°, and the angle of the obtuse angle is 150°-100°; the angle between the adjacent two grooves is preferably For 60°, the angle of the obtuse angle is preferably 120°.
  • the groove body of the other pair of locking grooves extends from the root to the end portion, and the connecting surface has the same length as the tooth height, and the thickness is the same as the thickness of the rib, which is half of the tooth thickness.
  • one end of the hose is directly fixed to the bottom of the inner pipe; or one end of the hose is connected to the inner pipe through a joint, and the joint between the joint and the hose is screwed or glued. Connect or double injection molded connections or interference connections.
  • the telescopic hose has a ratio of expansion and contraction ratio of 2:1 to 5:1; preferably 3:1, as needed.
  • the bendable telescopic tube provided by the invention has a simple and compact structure, realizes the expansion and contraction of the tube body while bending, has a large cleaning range and is convenient to operate.
  • Figure 1 is a schematic view showing the overall structure of the present invention
  • FIG. 2 is a partial structural schematic view of the telescopic release device of the present invention.
  • FIG. 3 is a schematic perspective view of a bending mechanism of the present invention.
  • Figure 4 is a cross-sectional view of the bending mechanism of the present invention.
  • Figure 5 is a schematic structural view of a first ring gear of the present invention.
  • FIG. 6 is a schematic structural view of a second ring gear of the present invention.
  • FIG. 7-1 to 7-3 are schematic structural views of a locking gear of the present invention.
  • Figure 8-1 is a schematic view showing the external structure when the bending is -60° of the present invention.
  • FIG. 8-2 is a schematic view showing the positional relationship between the locking gear and the first and second ring gears when the bending is -60° according to the present invention
  • FIG. 8-3 is a schematic view showing the external structure when the bending is 75° according to the present invention
  • Figure 8-4 is a schematic view showing the positional relationship between the locking gear and the first and second ring gears when the bending is 75° according to the present invention
  • Figure 9 is a partial structural view of the hose connection
  • Figure 10-1 is a schematic view showing the positional relationship between the hose and the bending mechanism in a straight line state according to the present invention
  • Figure 10-2 is a schematic view showing the external structure in a straight line state according to the present invention.
  • Figure 10-3 is a schematic view showing the positional relationship between the locking gear and the first ring gear and the second ring gear in a straight line state
  • Figure 11 is a schematic view showing the positional relationship between the hose and the bending mechanism before the bending of the present invention.
  • FIG. 1 is a schematic view of the overall structure of the present invention.
  • a bendable telescopic tube includes an inner tube 1 and an outer tube.
  • the inner tube 1 is inserted into the outer tube and can be slid and positioned in the outer tube;
  • the outer tube is configured by the first outer tube 21 And a second outer tube 22, the two are connected by a bending mechanism;
  • a cavity for accommodating the tube body is disposed between the first outer tube 21 and the second outer tube 22;
  • the outer tube is provided with a telescopic tube a hose 5, the retractable hose 5 end is connected to the inner tube 1, and the other end is connected to the second outer tube 22; when the retractable hose 5 is located in the cavity, the first outer The tube 21 and the second outer tube 22 are relatively rotated by a bending mechanism.
  • the telescopic tube further includes a telescopic release device, and the inner tube 1 slides in the outer tube through the telescopic release device.
  • the telescopic release device comprises a bushing 25 and a telescopic tube push button, and the telescopic tube push button is formed by combining the push button upper shell 26 and the push button bottom shell 27, and is wrapped on the first outer tube.
  • Front end of 21, first outer tube 21 The front end is provided with a roller groove 31, and the roller groove 31 is embedded with a roller 28.
  • the bushing 25 is sleeved on the outer wall of the inner tube 1, and the through hole is formed in the bushing 25.
  • the inner tube 1 is provided on the outer wall of the tube. a plurality of dimples 29; the inner surface of the push button upper case 26 is provided with a protruding portion, and the protruding portion passes through the through groove to press the roller 28 against the recess 29 of the inner tube 1, so that the inner tube 1 is opposite to the outer tube Tube positioning.
  • the telescopic tube push button is moved, the projection is offset from the pressing position of the roller 28, the roller 28 can be disengaged from the recess 29, and the inner tube 1 can be pulled and slid inside the outer tube.
  • the push button bottom case 27 is provided with a release button spring bracket and a release button spring, and the extension tube push button realizes a reciprocating pushing action on the bushing 25 by the release button spring to press or loosen the roller 28.
  • FIG. 3 is a schematic perspective view of a bending mechanism of the present invention
  • FIG. 4 is a cross-sectional view of the bending mechanism of the present invention.
  • the bending mechanism includes a locking gear 4, and a first ring gear 41 is disposed on both ends of the first outer tube 21, and two ends of the second outer tube 22 are
  • the second ring gear 42 is disposed on the side, the locking gear 4 is interposed between the first ring gear 41 and the second ring gear 42 , and the locking gear 4 is simultaneously with the first ring gear 41 and the second
  • the ring gear 42 is engaged to lock the first outer tube 21 and the second outer tube 22; or the locking gear 4 is disengaged from the second ring gear 42 to make the first outer tube 21 and the second outer tube There is a rotation between the 22s.
  • Figure 5 is a schematic view showing the structure of the first ring gear of the present invention.
  • the portion of the first outer tube 21 provided with the first ring gear 41 further includes a first housing 43 on both sides of the end of the first outer tube 21.
  • a partition 45 is provided in the middle of the cavity of the first housing 43 on each side, and the edge of the partition 45 is provided with a recess 48 to form a gap with the inner wall of the cavity of the first housing 43;
  • a through hole is formed in the through hole 45, and a fixing cap 49 is disposed at the through hole of the partition plate 45.
  • the inside of the fixing cap 49 is provided with a top pillar 52 from the inner side in the radial direction of the tubular body, and the top end of the top pillar 52 is provided with a release button spring 44.
  • the other end of the release button spring 44 abuts against the convex portion below the bending release button 47, and the fixing cap 49 is fixedly inserted with the positioning post protruding from the inner side of the bottom surface of the second casing 43; the bending release button 47 is The edge extends downward to form a claw 54.
  • the end of the claw 54 passes through the recess 48, adjacent to the side of the locking gear 4; the end of the claw 54 is further provided with a barb, which is hooked on the first outer
  • the other side of the partition plate 45 is provided with a first ring gear 41 along the inner wall of the first casing 43.
  • the first ring gear 41 is provided on the first ring gear 41.
  • the protrusions 51 are disposed at two ends of the same diameter of the first casing 43 to form a pair corresponding to the position of the locking groove 56 opened on the same diameter of the locking gear 4; the first ring gear 41 A lock gear 4 is engaged, and a gear spring 46 is disposed between the lock gear 4 and the second ring gear 42.
  • One side of the gear spring 46 abuts against one side of the lock gear 4, and the other side and the second ring gear 42 The inner side is against the top.
  • FIG. 6 is a schematic view showing the structure of a second ring gear of the present invention.
  • the second outer tube 22 is further provided with a second housing 55 , and the second housing 55 is spaced apart from the two ends of the second outer tube 22 .
  • the outer side of the bottom surface of the second housing 55 on both sides is opposite to each other and is tangential to the top surface of the first housing 43 .
  • the second ring gear 42 is disposed on the inner wall of the second housing 55 and the second ring gear 42 .
  • the inner side of the bottom surface of the second housing 55 A positioning post 53 is convexly disposed, and the positioning post 53 is engaged with the fixing cap 49.
  • the bending mechanism includes a first outer tube 21, a second outer tube 22, a bending release button 47, a lock gear 4, and a gear spring 46.
  • the first outer tube 21 and the second outer tube 22 are coupled by a top post 52 which corresponds to a pivot axis whose axis is perpendicular to the central axis of the outer tube of the inner tube.
  • the lock gear 4 is located between the first outer tube 21 and the second outer tube 22 and is engageable with the inner ring gears on the first outer tube 21 and the second outer tube 22 at the same time.
  • a gear spring 46 is disposed between the second outer tube 22 and the lock gear 4 to push the lock gear 4 to eject.
  • the bending release button 47 is pressed, and the lock gear 4 is pushed into the second outer tube 22, at which time the locking gear 4 meshes only with the second outer tube 22, the first outer tube 21 and the second outer tube The tube 22 is free to rotate.
  • Figure 7-1 to Figure 7-3 show the structure of the locking gear of the present invention.
  • the lock gear 4 includes a gear body 401, and a plurality of teeth 402 are evenly disposed on the circumference of the gear body 401.
  • the gear body 401 is uniformly provided with 12 teeth on the circumference.
  • a plurality of locking grooves 56 are defined in a radial direction of the gear body 401 from a circumferential direction to a center of the gear body 401, and the locking grooves 56 cooperate with the first ring gear and the second ring gear 42 to The bendable telescopic tube is locked or bent.
  • each of the two locking grooves 56 which are formed on the same diameter of the locking gear 4 is a pair, which are spaced apart by 180° on the same straight line, and the four locking grooves 56 are divided into two.
  • a rib 57 is protruded from the root of the groove of the pair of locking grooves 56; the thickness of the rib 57 is half of the tooth thickness, and the length of the rib 57 is the same as the length of the locking groove 56.
  • the purpose of the rib 57 is to prevent the lock gear 4 and the first outer tube 21 from being completely meshed in the locked state, but the first outer tube 21 and the second outer tube 22 can be simultaneously engaged with the lock gear 4.
  • the acute angle between the adjacent two grooves is 30 ° -80 °, the angle of the obtuse angle is 150 ° -100 °, the angle of the acute angle is preferably 60 °, the angle of the obtuse angle It is preferably 120°.
  • the acute angle between the adjacent two grooves is 60°, and the angle of the obtuse angle is 120°.
  • the groove body of the other pair of locking grooves 56 is provided with a connecting surface extending from the root portion to the end portion. The length of the connecting surface is equal to the height of the tooth, and the thickness is the same as the thickness of the rib 57, which is half of the tooth thickness.
  • the connecting surface corresponds to a wide groove in the second outer tube 22, as shown in Fig. 6, for the purpose of facilitating assembly.
  • FIG. 8-1 is a schematic view showing the external structure of the present invention when the bending is -60 °
  • FIG. 8-2 is a schematic view showing the positional relationship between the locking gear and the first and second ring gears when the bending is -60° according to the present invention
  • the external structure is indicated when the invention is bent at 75 °
  • Figure 8-4 is a schematic view showing the positional relationship between the locking gear and the first and second ring gears when the bending is 75 ° according to the present invention.
  • the first outer tube 21 and the second outer tube 22 are respectively provided with corresponding protrusions 51 and grooves 48 corresponding to the locking gears 4.
  • the first outer tube 21 is provided with a protrusion, preferably a pair, which is spaced apart by 180°, that is, in a straight line, the protrusion 51 is on the locking gear 4 when the upper second outer tube 22 is in the locked position.
  • the groove is engaged.
  • first outer tube 21 and the second outer tube 22 are interposed with each other, the end portions interfere with each other due to the end structures of the both, and therefore, the first outer tube 21
  • the angle that can be bent between the second outer tube 22 and the second outer tube 22 ranges from 0 to 75 degrees.
  • Figure 9 is a partial structural view of the hose connection.
  • the inner tube 1 and the second outer tube 22 and the telescopic hose 5 are connected, which can solve the problem of sealing well.
  • the 5 end of the telescopic hose can be fixed to the inner tube 1 through a joint or a direct connection. bottom of.
  • the flexible hose 5 and the joint can be connected and sealed by threading, glue bonding or double injection molding; the joint can be connected and sealed with the inner tube 1 by means of threading, glue bonding, interference, etc.; of course, the flexible hose 5 is also It can be directly sealed with the inner tube 1 by means of threading, glue bonding or the like.
  • the other end of the bellows 5 can also be connected and sealed to the bottom of the second outer tube 22 in the above manner.
  • the bottom of the inner tube 1 and the bottom of the second outer tube 22 form a duct having a length that can be changed and sealed.
  • the telescopic ratio of the retractable hose 5 is in the range of 2:1 to 5:1; preferably 3:1, and the expansion ratio used in the embodiment is the preferred ratio.
  • 10-1 is a schematic view showing the positional relationship between the hose and the bending mechanism in a straight line state according to the present invention
  • FIG. 10-2 is a schematic view showing the external structure in a straight line state according to the present invention
  • FIG. 10-3 is a locking gear in a straight line state according to the present invention
  • Schematic diagram of the positional relationship with the first ring gear and the second ring gear As shown in FIG. 10-1 to FIG. 10-3 and in conjunction with FIG. 4, in the straight state, the hose 5 is in a tightened state and is located inside the second outer tube 22.
  • the locking gear 4 is located at the Between the outer tube 21 and the second outer tube 22, the first ring gear 41 and the second ring gear 42 can be simultaneously engaged. Therefore, the first outer tube 21 and the second outer tube 22 are aligned in a line and cannot be bent.
  • the depth of insertion of the inner tube 1 into the outer tube can be adjusted by the telescopic release device, thereby realizing different length changes of the folded telescopic tube. Referring to Fig. 2 and, in the normal state, the two projections under the pusher upper casing 26 of the telescopic release device press the roller 28 into the recess 29 of the inner tube 1, and the inner tube 1 is opposed to the outer tube. The position is fixed.
  • Fig. 11 is a view showing the positional relationship between the hose and the bending mechanism before the bending of the present invention. As shown in Fig. 11, the limit position of the inner tube of the present invention, that is, in the embodiment shown in Fig. 11, the hose 5 is pulled up to the longest, and the length of the inner tube 1 extending out of the outer tube is also the longest.
  • the bending release button 47 is pressed, and under the action of the release button spring 44, the bending release button 47 can be displaced downwardly, and the claw 54 formed by the downward extension of the edge of the bending release button 47 is formed.
  • the end of the partitioning groove 45 is formed with a gap between the groove 48 and the inner wall of the cavity of the first casing 43 to act on the side of the locking gear 4, so that the locking gear 4 is disengaged from the first ring gear 41, only with The second ring gear 42 is engaged, and the first outer tube 21 and the second outer tube 22 are unlocked, and can be rotated, and can be freely bent within a certain angle range, so that the user can easily clean the sofa without bending over or under the bed.
  • the bending mechanism can also be locked to facilitate the user to clean some special corners or the top of the wardrobe.
  • the structure of the invention is simple and compact, can be freely bent within a certain angle range, and the tube body can be freely stretched and retracted, the cleaning range of the vacuum cleaner is increased, and the operation is convenient.
  • other structural forms can be employed regardless of the bending mechanism or the telescopic release device, and the same technical effects can be achieved.
  • the bending mechanism may not directly adopt the matching manner of the gears and the ring gears listed in the embodiments of the present invention, and directly adopt the two half structures that are pivotally connected to each other, and limit the rotational position between the two by the limiting block.
  • the bending of the pipe body can also be achieved.
  • the telescopic release device can also be realized by a method similar to the spring, the positioning pin and the positioning groove.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Vacuum Cleaner (AREA)

Description

用于吸尘器的伸縮管 技术领域
本发明涉及一种伸縮管, 尤其是一种用于吸尘器的伸縮管, 属于吸尘器制造技术 领域。 背景技术
普通的吸尘器伸縮管功能比较单一, 因为其本身不能折弯使用, 在清理沙发、 床 等比较低的地方时, 如果不借用可以折弯或带拐角的附件, 使用者就必须屈身或蹲下 操作。 同样, 如果清理的位置高于人体手臂举起来的高度, 例如: 清洁衣柜、 书架顶 部等地方, 若不借用可以折弯或带拐角的附件, 清洁用的吸头不能接触到待清洁的表 面, 导致使用者无法进行清理, 限制了清洁工具的使用范围。
现有技术中也有能折弯的附件,但是却无法伸縮,参见公开号为 CN 101491423A, 公开可一种可重配置的气流伸长杆。 该技术方案存在的缺陷就是折弯管本身的长度不 能变化, 需要借助另外的伸縮管来实现长度变化, 给用户的收藏储存及操作带来不便 利。 发明内容
本发明所要解决的技术问题在于, 针对现有技术的不足提供一种可折弯伸縮管, 结构简单紧凑, 在折弯的同时实现管体的伸縮, 清洁范围大且操作方便。
本发明所要解决的技术问题是通过如下技术方案实现的:
一种可折弯伸縮管, 包括内管和外管, 内管插设在外管中, 且可以在外管内滑动 并定位; 所述的外管由第一外管和第二外管组成, 两者通过折弯机构相连接; 第一外 管与第二外管之间设有用于容置管体的空腔; 所述的外管内设有可伸縮的软管, 该可 伸縮的软管一端与内管相连, 另一端和第二外管相连; 可伸縮的软管位于所述空腔内 时, 所述的第一外管和第二外管通过折弯机构发生相对转动。
所述的折弯机构包括锁定齿轮, 所述第一外管的末端两侧设有第一齿圈, 所述第 二外管的末端两侧设有第二齿圈, 所述的锁定齿轮夹设在第一齿圈和第二齿圈之间, 所述的锁定齿轮同时与所述第一齿圈和第二齿圈啮合, 使第一外管和第二外管之间锁 死; 或者所述的锁定齿轮与所述第二齿圈脱离, 使第一外管和第二外管之间能够产生 转动。 所述第一外管设有第一齿圈的部位还包括有第一壳体, 该第一壳体在第一外管末 端两侧间隔设置, 每一侧第一壳体的空腔中部都设有隔板, 隔板的边缘设有凹陷部, 与第一壳体的空腔内壁之间形成间隙; 隔板上开设通孔, 隔板的通孔处设有固定帽, 固定帽的内部沿管体径向从内向外设有顶柱, 顶柱的顶端套设有释放钮弹簧, 释放钮 弹簧的另一端与折弯释放钮下方的凸起部抵顶;折弯释放钮的边缘向下延伸形成凸爪, 凸爪的末端穿过所述凹陷部, 与所述的锁定齿轮侧面相邻; 凸爪的末端还设有倒钩, 勾设在第一外管上; 隔板的另一侧沿第一壳体内壁环设有第一齿圈, 第一齿圈上设有 凸起, 设置在第一壳体同一直径的两端, 形成一对, 其设置位置与所述锁定齿轮同一 直径上开设的锁定槽的设置位置相对应; 第一齿圈上啮合有锁定齿轮, 锁定齿轮和第 二齿圈之间设有齿轮弹簧, 齿轮弹簧的一侧与锁定齿轮的一侧抵顶, 另一侧与所述第 二齿圈内侧相抵顶。
所述的第二外管设有第二齿圈的部位还包括有第二壳体, 该第二壳体在第二外管 末端两侧间隔设置, 两侧的第二壳体的底面外侧彼此相对且与第一壳体的顶面相切, 所述的第二齿圈环设在第二壳体的内壁上, 第二壳体的底面内侧中心凸设有定位柱, 该定位柱与所述的固定帽卡合连接。
所述的锁定齿轮包括齿轮本体, 所述的齿轮本体的圆周上均匀设置有多个齿, 在 所述齿轮本体的一侧面上沿齿轮本体的径向从圆周向圆心方向开设有多个锁定槽, 所 述锁定槽与第一齿圈和第二齿圈配合, 使所述可折弯伸縮管锁定或弯折。
所述的锁定槽为 4个, 开设在锁定齿轮同一直径上的每 2个锁定槽为一对, 其中 一对锁定槽的槽体根部凸设有肋条; 所述的肋条的厚度为齿厚的一半, 肋条的长度与 锁定槽的长度相同。
所述的 4个锁定槽中, 相邻的两槽之间的锐角夹角范围是 30° -80° , 钝角夹角为 150° -100° ; 相邻的两槽之间的锐角夹角优选为 60° , 钝角夹角优选为 120° 。
所述的另一对锁定槽的槽体从根部到端部延伸设有连接面, 连接面的长度与齿高 相等, 厚度与肋条厚度相同, 为齿厚的一半。
为了便于管体的密封, 所述软管的一端直接固定在内管的底部; 或者, 所述软管 的一端通过接头一与内管相连, 接头一和软管之间为螺纹连接或胶水粘接或二次注塑 成型连接或过盈连接。
根据需要, 所述可伸縮的软管的伸縮比范围是 2: 1至 5: 1; 优选为 3 : 1。
综上所述, 本发明提供的可折弯伸縮管, 结构简单紧凑, 在折弯的同时实现管体 的伸縮, 清洁范围大且操作方便。 下面结合附图和具体实施方式对本发明的技术方案进行详细地说明。 附图说明
图 1为本发明整体结构示意图;
图 2为本发明伸縮释放装置的局部结构示意图;
图 3为本发明折弯机构的立体结构示意图;
图 4为本发明折弯机构的剖视图;
图 5为本发明第一齿圈的结构示意图;
图 6为本发明第二齿圈的结构示意图;
图 7-1至图 7-3为本发明锁定齿轮的结构示意图;
图 8-1为本发明折弯 -60° 时的外部结构示意图;
图 8-2为本发明折弯 -60° 时锁定齿轮与第一、 第二齿圈的位置关系示意图; 图 8-3为本发明折弯 75° 时外部结构示意图;
图 8-4为本发明弯折 75° 时锁定齿轮与第一、 第二齿圈的位置关系示意图; 图 9为软管连接局部结构示意图;
图 10-1为本发明在直线状态下软管与折弯机构的位置关系示意图;
图 10-2为本发明直线状态下的外部结构示意图;
图 10-3为本发明在直线状态下锁定齿轮与第一齿圈、第二齿圈的位置关系示意图; 图 11为本发明待折弯前软管与折弯机构的位置关系示意图。 具体实施方式
图 1为本发明整体结构示意图。 如图 1所示, 一种可折弯伸縮管, 包括内管 1和 外管, 内管 1插设在外管中, 且可以在外管内滑动并定位; 所述的外管由第一外管 21 和第二外管 22组成, 两者通过折弯机构相连接; 第一外管 21与第二外管 22之间设有 用于容置管体的空腔; 所述的外管内设有可伸縮的软管 5, 该可伸縮的软管 5—端与 内管 1相连, 另一端和第二外管 22相连; 可伸縮的软管 5位于所述空腔内时, 所述的 第一外管 21和第二外管 22通过折弯机构发生相对转动。
图 2为本发明伸縮释放装置的局部结构示意图。 如图 2所示, 为了便于对管体的 伸縮进行控制, 所述的伸縮管还包括伸縮释放装置, 内管 1通过伸縮释放装置在外管 内滑动。 具体来说, 所述的伸縮释放装置包括衬套 25和伸縮管推钮, 伸縮管推钮由推 钮上壳 26和推钮底壳 27两部分对合而成, 包覆在第一外管 21的前端, 第一外管 21 的前端设有滚柱槽 31, 滚柱槽 31内嵌设有滚柱 28, 衬套 25套设在内管 1外壁上, 衬 套 25上开设通槽, 内管 1管体外壁上设有多个凹坑 29; 推钮上壳 26的内表面设有凸 出部, 凸出部通过通槽, 将滚柱 28在内管 1的凹坑 29上压紧, 使内管 1相对与外管 定位。 移动伸縮管推钮, 凸出部偏离对滚柱 28 的压紧位置, 滚柱 28 能够从凹坑 29 中脱离出来, 内管 1能够被拉动并在外管内滑动。推钮底壳 27上设有释放钮弹簧支架 和释放钮弹簧, 伸縮管推钮在释放钮弹簧的作用下实现在衬套 25上的往复推动动作, 将滚柱 28压紧或放松。
图 3为本发明折弯机构的立体结构示意图; 图 4为本发明折弯机构的剖视图。 如 图 3并结合图 4所示, 所述的折弯机构包括锁定齿轮 4, 所述第一外管 21的末端两侧 设有第一齿圈 41, 所述第二外管 22的末端两侧设有第二齿圈 42, 所述的锁定齿轮 4 夹设在第一齿圈 41和第二齿圈 42之间, 所述的锁定齿轮 4同时与所述第一齿圈 41 和第二齿圈 42啮合, 使第一外管 21和第二外管 22之间锁死; 或者所述的锁定齿轮 4 与所述第二齿圈 42脱离, 使第一外管 21和第二外管 22之间能够产生转动。
图 5为本发明第一齿圈的结构示意图。 结合图 3, 如图 5所示, 所述第一外管 21 设有第一齿圈 41的部位还包括有第一壳体 43, 该第一壳体 43在第一外管 21末端两 侧间隔设置, 每一侧第一壳体 43的空腔中部都设有隔板 45, 隔板 45的边缘设有凹陷 部 48, 与第一壳体 43的空腔内壁之间形成间隙; 隔板 45上开设通孔, 隔板 45的通 孔处设有固定帽 49, 固定帽 49的内部沿管体径向从内向外设有顶柱 52, 顶柱 52的顶 端套设有释放钮弹簧 44,释放钮弹簧 44的另一端与折弯释放钮 47下方的凸起部抵顶, 固定帽 49与所述第二壳体 43底面内侧凸设的定位柱插设固定;折弯释放钮 47的边缘 向下延伸形成凸爪 54, 凸爪 54的末端穿过所述凹陷部 48, 与所述的锁定齿轮 4侧面 相邻; 凸爪 54的末端还设有倒钩, 勾设在第一外管 21上; 隔板 45的另一侧沿第一壳 体 43内壁环设有第一齿圈 41, 第一齿圈 41上设有凸起 51, 设置在第一壳体 43同一 直径的两端, 形成一对, 其设置位置与所述锁定齿轮 4 同一直径上开设的锁定槽 56 的设置位置相对应; 第一齿圈 41上啮合有锁定齿轮 4, 锁定齿轮 4和第二齿圈 42之 间设有齿轮弹簧 46, 齿轮弹簧 46的一侧与锁定齿轮 4的一侧抵顶, 另一侧与所述第 二齿圈 42内侧相抵顶。
图 6为本发明第二齿圈的结构示意图。 如图 6所示, 所述的第二外管 22设有第 二齿圈 42的部位还包括有第二壳体 55, 该第二壳体 55在第二外管 22末端两侧间隔 设置, 两侧的第二壳体 55的底面外侧彼此相对且与第一壳体 43的顶面相切, 所述的 第二齿圈 42环设在第二壳体 55的内壁上第二齿圈 42, 第二壳体 55的底面内侧中心 凸设有定位柱 53, 该定位柱 53与所述的固定帽 49卡合连接。
如图 3-图 6所示, 折弯机构包括第一外管 21, 第二外管 22, 折弯释放钮 47, 锁 定齿轮 4以及齿轮弹簧 46。 第一外管 21与第二外管 22通过顶柱 52联接, 该顶柱 52 相当于枢轴, 该枢轴的轴线与内管外管的中心轴垂直。 当伸縮管拉伸到最长时, 同时 按下折弯释放钮 47, 第一外管 21和第二外管 22就可以转动, 第一外管 21和第二外 管 22始终在同一平面内以一定的角度弯折。 锁定齿轮 4位于第一外管 21和第二外管 22之间, 可以同时和第一外管 21和第二外管 22上的内内齿圈啮合。所述第二外管 22 和锁定齿轮 4之间设置有齿轮弹簧 46, 可以推动锁定齿轮 4弹出。 当第一外管 21和 第二外管 22在一直线上时, 锁定齿轮 4和第一外管 21和第二外管 22上的凸起 51同 时啮合, 使得第一外管 21和第二外管 22之间无法转动, 齿轮形状能将伸縮管承受负 载时产生的巨大扭力均匀分散, 保证伸縮管不会被破坏。 当需要折弯时, 按下折弯释 放钮 47, 锁定齿轮 4被推入第二外管 22中, 此时锁定齿轮 4只和第二外管 22啮合, 第一外管 21和第二外管 22可以自由转动。
图 7-1至图 7-3为本发明锁定齿轮的结构示意图。 如图 7-1至图 7-3并结合图 5、 图 6所示, 所述的锁定齿轮 4包括齿轮本体 401, 所述的齿轮本体 401的圆周上均匀 设置有多个齿 402, 在本实施例中, 所述的齿轮本体 401的圆周上均匀设置有 12齿。 在所述齿轮本体 401的一侧面上沿齿轮本体 401的径向从圆周向圆心方向开设有多个 锁定槽 56, 所述锁定槽 56与第一齿圈和第二齿圈 42配合, 使所述可折弯伸縮管锁定 或弯折。在本实施例中的锁定槽 56为 4个, 开设在锁定齿轮 4同一直径上的每 2个锁 定槽 56为一对, 其在同一直线上且间隔 180° , 4个锁定槽 56分为两对。 其中一对锁 定槽 56的槽体根部凸设有肋条 57 ; 所述的肋条 57的厚度为齿厚的一半, 肋条 57的 长度与锁定槽 56的长度相同。 设置肋条 57的目的是为了使在锁定状态时, 锁定齿轮 4和第一外管 21不完全啮合, 但第一外管 21和第二外管 22能够同时与锁定齿轮 4啮 合。 所述的 4个锁定槽 56中, 相邻的两槽之间的锐角夹角范围是 30 ° -80 ° , 钝角夹 角为 150 ° -100 ° , 锐角夹角优选为 60 ° , 钝角夹角优选为 120° 。 本实施例中的 4 个锁定槽 56中, 相邻的两槽之间的锐角夹角就是 60° , 钝角夹角为 120° 。 所述的另 一对锁定槽 56的槽体从根部到端部延伸设有连接面, 连接面的长度与齿高相等, 厚度 与肋条 57厚度相同, 为齿厚的一半。 该连接面对应于第二外管 22中的宽槽, 如图 6 所示, 其作用是为了便于装配。
图 8-1为本发明折弯 -60 ° 时的外部结构示意图;图 8-2为本发明折弯 -60° 时锁定 齿轮与第一、 第二齿圈的位置关系示意图; 图 8-3为本发明折弯 75 ° 时外部结构示意 图; 图 8-4为本发明弯折 75 ° 时锁定齿轮与第一、 第二齿圈的位置关系示意图。 如图 8-1至图 8-4并结合图 5、 图 6所示, 所述第一外管 21和第二外管 22对应锁定齿轮 4 分别设置有相应的凸起 51和凹槽 48。 所述第一外管 21上设置有凸起, 优选为一对, 其间隔 180° , 即在一直线上, 所述凸起 51在上第二外管 22锁定位置时与锁定齿轮 4 上的槽啮合。 当第一外管 21和第二外管 22在某一角度之间自由转动时, 锁定齿轮 4 和第二外管 22完全啮合, 第一外管 21上的凸起 51在锁定齿轮 4上夹角为 120° 的两 个槽之间的齿轮端面上自由滑动, 此时折弯机构不会自动锁定, 两个外管之间的夹角 可以在某一角度之间连续变化, 方便用户清扫。 通常情况下, 由于第一外管 21和第二 外管 22为彼此插设在一起的, 由于两者的端部结构,在彼此弯折时,端部会发生干涉, 因此, 第一外管 21和第二外管 22之间可弯折的角度范围为 0~75° 。 当第一外管 21 和第二外管 22在 -60~0° 之间转动时, 锁定齿轮 4和第二外管 22完全啮合, 第一外管 21上的凸起 51在锁定齿轮 4上夹角为 -60° 的两个槽之间的齿轮端面上滑动, 当上第 二外管 22之间呈 -60° 角时, 凸起 51位于和锁定齿轮 4上的槽啮合的位置, 在齿轮弹 簧 46的作用下, 锁定齿轮 4被部分弹出第二外管 22的内齿圈, 和第一外管 21内齿圈 啮合。 此时上第二外管 22被锁定, 不再自由转动。
需要说明的是,上文中所述的角度正负的界定方式, 当伸縮管水平平直时, 为 0° 基准, 管体沿顺时针方向旋转的角度为正值, 沿逆时针方向旋转的角度为负值。
图 9为软管连接局部结构示意图。 如图 9所示, 内管 1和第二外管 22以及伸縮 软管 5是连接的, 能很好的解决密封的问题, 伸縮软管 5—端可以通过接头或者直接 连接固定在内管 1的底部。 伸縮软管 5与接头可以通过螺纹、 胶水粘接或者二次注塑 成型进行连接和密封; 接头可以通过螺纹、 胶水粘接、 过盈等方式与内管 1连接和密 封; 当然伸縮软管 5亦可以通过螺纹、 胶水粘接等方法直接与内管 1连接密封。 同理, 伸縮软管 5另一端也可以用以上方式与第二外管 22的底部连接和密封。如此一来内管 1底部和第二外管 22底部就形成了一个长度可以伸縮变化且密封的风道。
如图 9所示, 当内管 1只插入到第一外管 21 时, 伸縮软管 5仍然连接在内管 1 底部和第二外管 22底部, 由于伸縮软管 5是柔性的, 所以第一外管 21和第二外管 22 能够通过折弯机构折弯, 并且还能保持密封。 解决了一般伸縮管不能折弯, 折弯管不 能伸縮的问题。
根据需要, 所述可伸縮的软管 5的伸縮比范围是 2: 1至 5: 1; 优选为 3: 1, 本 实施例中所采用的伸縮比, 就是其优选比例值。
以下结合附图对本发明的动作过程进行详细地说明: 图 10-1为本发明在直线状态下软管与折弯机构的位置关系示意图; 图 10-2为本 发明直线状态下的外部结构示意图; 图 10-3为本发明在直线状态下锁定齿轮与第一齿 圈、 第二齿圈的位置关系示意图。 如图 10-1至图 10-3并结合图 4所示, 本发明在直 线状态下, 软管 5处于縮紧状态, 并位于第二外管 22的内部, 此时, 锁定齿轮 4位于 第一外管 21和第二外管 22之间, 可以与第一齿圈 41和第二齿圈 42同时啮合, 因此, 第一外管 21与第二外管 22排成一线无法折弯。 为满足不同的使用要求, 可以通过伸 縮释放装置调节内管 1插入外管的深度, 从而实现折叠伸縮管的不同长度变化。 参照 图 2和, 正常状态下, 伸縮释放装置的推钮上壳 26下方的两个凸出部将滚柱 28压紧 在内管 1的凹坑 29中定位, 内管 1与外管的相对位置固定。在需要对内管 1的长度进 行调节时, 先按住推钮上壳 26和底壳 27, 朝内管 5方向移动, 使推钮上壳 26下方的 两个凸出部的位置偏离滚柱 28, 不再压紧。 拉动内管 5, 使其伸出或縮进到所需长度。 此时, 再次按住推钮上壳 26和底壳 27, 在释放钮弹簧 44的作用下, 朝外管方向移动, 推钮上壳 26下方的两个凸出部重新将滚柱 28压紧在内管的凹坑 29中定位,实现对内 管伸縮长度的调整。
当内管 1伸出外管的长度足够长, 使软管恰好位于折弯机构中部容置管体的空腔 内时, 可以对其进行折弯操作。 图 11为本发明待折弯前软管与折弯机构的位置关系示 意图。 如图 11所示, 为本发明内管的极限位置, 也就是说, 在图 11所示的实施例中, 软管 5拉到最长, 内管 1伸出外管的长度也是最长。在该状态下, 按下折弯释放钮 47, 在释放钮弹簧 44的作用下, 折弯释放钮 47可以向下方有一个位移, 此时折弯释放钮 47边缘向下延伸形成的凸爪 54的末端, 穿过隔板 45边缘设置凹槽 48与第一壳体 43 的空腔内壁之间形成间隙, 作用在锁定齿轮 4的侧面上, 使锁定齿轮 4脱离第一齿圈 41, 只与第二齿圈 42啮合, 第一外管 21和第二外管 22脱离锁定, 就可以转动了, 在 一定角度范围内是可以自由折弯的,以方便用户无须弯腰就能轻松打扫沙发或床底下。 当第一外管 21和第二外管 22折成特定角度时, 折弯机构还能够锁定, 以方便用户打 扫一些特殊角落或者衣柜顶部等地方。
当完成了特殊位置的清扫, 需要将吸尘器的伸縮管恢复成平直状态时, 可以分别 握住内管和外管, 朝已弯折方向的反方向用力, 在分别位于锁定齿轮 4两侧的齿轮弹 簧 46和释放钮弹簧 44的作用下, 锁定齿轮 4自动回位, 重新与第一齿圈 41和第二齿 圈 42同时啮合。
综上所述, 本发明结构简单紧凑, 能够在一定角度范围内自由折弯, 且管体能够 自由伸縮, 增大了吸尘器清洁范围, 且操作方便。 除了上述实施例中具体列举的实施方式之外, 无论是折弯机构或者伸縮释放装 置, 都可以采用其他的结构形式, 实现同样的技术效果。 例如, 折弯机构也可以不采 用本发明实施例中所列举的齿轮、 齿圈的配合方式, 直接采用相互枢接的两半结构, 通过限位块对两者之间的转动位置进行限制, 同样可以实现管体的折弯。 而伸縮释放 装置, 也可以通过类似弹簧、 定位销和定位槽相互配合的方式来实现。

Claims

权利要求书
1、 一种用于吸尘器的伸縮管, 包括内管 (1) 和外管, 内管 (1) 插设在外管中, 且可以在外管内滑动并定位; 其特征在于, 所述的外管由第一外管 (21) 和第二外管
(22) 组成, 两者通过折弯机构相连接; 第一外管 (21) 与第二外管 (22) 之间设有 用于容置管体的空腔; 所述的外管内设有可伸縮的软管 (5), 该可伸縮的软管 (5) — 端与内管 (1) 相连, 另一端和第二外管 (22) 相连; 可伸縮的软管 (5) 位于所述空 腔内时, 所述的第一外管 (21) 和第二外管 (22) 通过折弯机构发生相对转动。
2、 如权利要求 1所述的用于吸尘器的伸縮管, 其特征在于, 所述的折弯机构包括 锁定齿轮(4),所述第一外管(21)的末端两侧设有第一齿圈(41),所述第二外管(22) 的末端两侧设有第二齿圈 (42), 所述的锁定齿轮 (4) 夹设在第一齿圈 (41) 和第二 齿圈 (42) 之间, 所述的锁定齿轮 (4) 同时与所述第一齿圈 (41) 和第二齿圈 (42) 啮合, 使第一外管 (21) 和第二外管 (22) 之间锁死; 或者所述的锁定齿轮 (4) 与所 述第二齿圈 (42) 脱离, 使第一外管 (21) 和第二外管 (22) 之间能够产生转动。
3、 如权利要求 2所述的用于吸尘器的伸縮管, 其特征在于, 所述第一外管 (21) 设有第一齿圈(41)的部位还包括有第一壳体(43),该第一壳体(43)在第一外管(21) 末端两侧间隔设置, 每一侧第一壳体 (43) 的空腔中部都设有隔板 (45), 隔板 (45) 的边缘设有凹陷部 48, 与第一壳体 (43) 的空腔内壁之间形成间隙; 隔板 (45) 上开 设通孔, 隔板 (45) 的通孔处设有固定帽 (49), 固定帽 (49) 的内部沿管体径向从内 向外设有顶柱 (52), 顶柱 (52) 的顶端套设有释放钮弹簧 (44), 释放钮弹簧 (44) 的另一端与折弯释放钮 (47) 下方的凸起部抵顶; 折弯释放钮 (47) 的边缘向下延伸 形成凸爪 (54), 凸爪 (54) 的末端穿过所述凹陷部 (48), 与所述的锁定齿轮 (4) 侧 面相邻; 凸爪 (54) 的末端还设有倒钩, 勾设在第一外管上; 隔板 (45) 的另一侧沿 第一壳体 (43) 内壁环设有第一齿圈 (41), 第一齿圈 (41) 上设有凸起 (51), 设置 在第一壳体 (43) 同一直径的两端, 形成一对, 其设置位置与所述锁定齿轮 (4) 同一 直径上开设的锁定槽(56)的设置位置相对应; 第一齿圈(41)上啮合有锁定齿轮(4), 锁定齿轮 (4) 和齿圈 (42) 之间设有齿轮弹簧 (46), 齿轮弹簧 (46) 的一侧与锁定 齿轮 (4) 的一侧抵顶, 另一侧与所述第二齿圈 (42) 内侧相抵顶。
4、如权利要求 3所述的用于吸尘器的伸縮管, 其特征在于,所述的第二外管(22) 设有第二齿圈(42)的部位还包括有第二壳体(55),该第二壳体(55)在第二外管(22) 末端两侧间隔设置, 两侧的第二壳体 (55) 的底面外侧彼此相对且与第一壳体 (43) 的顶面相切, 所述的第二齿圈 (42) 环设在第二壳体 (55) 的内壁上第二齿圈 (42), 第二壳体 (55) 的底面内侧中心凸设有定位柱 53, 该定位柱 53与所述的固定帽 49卡 合连接。
5、 如权利要求 2所述的用于吸尘器的伸縮管, 其特征在于, 所述的锁定齿轮(4) 包括齿轮本体 (401), 所述的齿轮本体 (401) 的圆周上均匀设置有多个齿 (402); 在 所述齿轮本体 (401) 的一侧面上沿齿轮本体 (401) 的径向从圆周向圆心方向开设有 多个锁定槽 (56), 所述锁定槽 (56) 与第一齿圈 (41) 和第二齿圈 (42) 配合, 使所 述伸縮管锁定或弯折。
6、 如权利要求 5所述的用于吸尘器的伸縮管, 其特征在于, 所述的锁定槽 (56) 为 4个, 开设在锁定齿轮 (4) 同一直径上的每 2个锁定槽 (56) 为一对, 其中一对锁 定槽 (56) 的槽体根部凸设有肋条 (57); 所述的肋条 (57) 的厚度为齿厚的一半, 肋 条 (57) 的长度与锁定槽 (56) 的长度相同。
7、如权利要求 6所述的用于吸尘器的伸縮管,其特征在于,所述的 4个锁定槽(56) 中, 相邻的两槽之间的锐角夹角范围是 30° -80° , 钝角夹角为 150° -100° ;
或者, 相邻的两槽之间的锐角夹角是 60° , 钝角夹角为 120° 。
8、 如权利要求 6所述的用于吸尘器的伸縮管, 其特征在于, 所述的另一对锁定槽
(56) 的槽体从根部到端部延伸设有连接面, 连接面的长度与齿高相等, 厚度与肋条
(57) 厚度相同, 为齿厚的一半。
9、 如权利要求 1所述的用于吸尘器的伸縮管, 其特征在于, 所述软管 (5) 的一 端直接固定在内管 (1) 的底部;
或者, 所述软管 (5) 的一端通过接头一与内管 (1) 相连, 接头一和软管 (5) 之 间为螺纹连接或胶水粘接或二次注塑成型连接或过盈连接。
10、 如权利要求 1所述的用于吸尘器的伸縮管, 其特征在于, 所述可伸縮的软管 (5), 其伸縮比为范围是 2: 1至 5: 1; 或者, 其伸缩比为 3: 1。
PCT/CN2012/073706 2011-04-14 2012-04-10 用于吸尘器的伸缩管 WO2012139488A1 (zh)

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