Telescopic rod

Abstract

The utility model provides a telescopic rod, which is applied to a dust collector and comprises a first rod and a second rod, the first rod is inserted into the second rod from the upper end of the second rod and is in sliding contact with the inner surface of the second rod, so that the first rod can slide relative to the second rod in the length direction of the first rod; a positioning tooth groove is formed in the outer wall of the first rod in the length direction of the first rod. The elastic piece is detachably arranged on the outer wall of the second rod in a sleeving mode, and a part of the elastic piece is arranged on the outer side of the positioning tooth groove; the elastic piece can be meshed with the positioning tooth groove; the connecting sleeve is detachably connected to the outer wall of the second rod in a sleeving mode and covers the outer side of the elastic piece; the connecting sleeve can rotate relative to the second rod and the elastic piece to abut against the elastic piece, so that the elastic piece is meshed with the positioning tooth groove, and the first rod and the second rod are relatively locked. According to the telescopic rod, the dust collector can adapt to different working conditions by freely adjusting the length of the telescopic rod, and the use experience of a user is improved.

Description

Technical Field

[0001] This application relates to the field of cleaning, and in particular to a telescopic pole. Background Technology

[0002] In existing technology, vacuum cleaners typically provide users with a gripping part through a handle connected to the dust collection duct, thus facilitating vacuuming within the work area. However, the fixed length of the handle cannot handle different work surfaces, causing inconvenience to the user. Utility Model Content

[0003] This application aims to solve at least one of the above-mentioned problems by providing a telescopic rod that allows users to adjust its length to adapt to different working surfaces, thereby facilitating vacuuming operations.

[0004] In a first aspect, this application provides a telescopic rod for use in a vacuum cleaner, comprising:

[0005] A first rod and a second rod; the first rod is inserted into the second rod from the upper end and slides in contact with the inner surface of the second rod, so that the first rod can slide relative to the second rod along the length direction of the first rod; wherein, the outer wall of the first rod is provided with positioning tooth grooves along the length direction of the first rod;

[0006] The elastic element is detachably sleeved on the outer wall of the second rod, and a part of the elastic element is disposed on the outside of the positioning tooth groove; the elastic element can engage with the positioning tooth groove.

[0007] A connecting sleeve is detachably fitted onto the outer wall of the second rod and covers the outer side of the elastic element; the connecting sleeve can rotate relative to the second rod and the elastic element to press against the elastic element, so that the elastic element is engaged with the positioning tooth groove, so that the first rod and the second rod are locked relative to each other.

[0008] Specifically, the elastic element includes:

[0009] The elastic collar is detachably clamped to the outer wall of the second rod;

[0010] The locking part is integrally formed with the elastic collar; the locking part is arranged along the length direction of the first rod; the locking part is located on the outside of the positioning tooth groove in its natural state; the locking part can respond to the rotation of the connecting sleeve, be pressed against the positioning tooth groove by the connecting sleeve and maintain engagement with the positioning tooth groove, so that the first rod and the second rod are relatively fixed.

[0011] Specifically, the upper end of the second rod is provided with a flange; the flange protrudes outward relative to the outer wall of the second rod, and an elastic collar is detachably provided below the flange; the upper end of the second rod is provided with a first notch, which is located on the outer periphery of the positioning tooth groove; the locking part extends through the first notch and is located on the outer side of the positioning tooth groove.

[0012] Specifically, a first limiting ring is provided along the outer periphery of the outer wall of the second rod; the first limiting ring protrudes from the outer wall of the second rod; the first limiting ring and the flange together form a limiting area; the elastic collar is detachably accommodated in the limiting area.

[0013] Specifically, a boss is provided between the first limiting ring and the flange, and the boss protrudes outward relative to the outer wall of the second rod; the boss, the first limiting ring and the flange together form a limiting area, so that the elastic collar is limited within the limiting area formed by the boss, the first limiting ring and the flange.

[0014] Specifically, the boss has a first end and a second end along the length direction of the second rod; the elastic collar has a first edge and a second edge along the length direction of the second rod; the first edge of the elastic collar is fitted to the first end of the boss, or the second edge of the elastic collar is fitted to the second end of the boss; wherein;

[0015] When the elastic collar is fitted onto the second rod, the central angle of the arc surface of the elastic collar from the first edge to the second edge is greater than 180°.

[0016] Specifically, in its natural state, the first edge and the second edge of the elastic collar are separated from each other in the circumferential direction of the elastic collar; the elastic collar can undergo elastic deformation so that the distance between the first edge and the second edge is greater than the outer diameter of the second rod, and is radially fitted onto the second rod, so that the first edge is fitted to the first end of the boss and the second edge is fitted to the second end of the boss.

[0017] Specifically, the inner wall of the second rod protrudes inward and is provided with a first guide plate and a second guide plate; the outer surface of the first rod is provided with a first guide rail in cooperation with the first guide plate and a second guide rail in cooperation with the second guide plate; the first rod and the second rod slide relative to each other through the cooperation of the first guide plate and the first guide rail, and through the cooperation of the second guide plate and the second guide rail.

[0018] Specifically, the first guide plate and the second guide plate are respectively arranged on both sides of the first notch along the circumference of the second rod; the first guide rail is recessed relative to the outer surface of the first rod, and the second guide rail is recessed relative to the outer surface of the first rod; a plurality of slot plates are connected between the first guide rail and the second guide rail to form positioning tooth grooves.

[0019] Specifically, a stiffener is provided at the upper end of the connecting sleeve along the length of the second rod; when the connecting sleeve is detachably fitted onto the outer wall of the second rod, the stiffener abuts against the flange to limit the relative position of the connecting sleeve and the second rod in the length direction of the second rod.

[0020] Specifically, the connecting sleeve is provided with a locking position relative to the elastic element; the connecting sleeve includes:

[0021] When the cylinder and connecting sleeve are fitted onto the outer wall of the second rod, the upper end of the cylinder is located outside the first rod and covers the end face of the second rod.

[0022] A convex plate is provided on the inner surface of the cylinder near the upper end and protrudes into the cylinder. When the connecting sleeve is rotated to the locking position, the convex plate is provided on the outside of the locking part and protrudes towards the locking part. The convex plate abuts against the locking part and presses the locking part into the positioning tooth groove, so that the locking part engages with the positioning tooth groove.

[0023] Specifically, the inner surface of the cylinder has an inwardly protruding rotating thread; the outer wall of the second rod has an outwardly protruding second limiting ring; when the connecting sleeve is detachably fitted onto the outer wall of the second rod, the rotating thread is located below the second limiting ring.

[0024] Specifically, the elastic element also includes a limiting piece; the connecting sleeve also includes:

[0025] The limiting groove is located on the inner surface of the cylinder and is recessed towards the outer wall of the cylinder.

[0026] A sliding portion extends along the inner circumference of the connecting sleeve and connects to the limiting groove; the sliding portion protrudes radially from the limiting groove relative to the connecting sleeve; the sliding portion is used for sliding contact with the limiting piece; wherein

[0027] When the connecting sleeve rotates to the locking position, the sliding part disengages from the limiting plate, and the limiting plate is confined in the limiting groove; when the connecting sleeve disengages from the locking position, the sliding part abuts against the limiting plate, the limiting plate disengages from the limiting groove, and can slide relative to the sliding part during the rotation stroke of the connecting sleeve.

[0028] Specifically, the upper end of the second rod is provided with a flange; the second rod is provided with a second notch, which is provided along the length direction of the second rod and extends to the flange; the flange protrudes relative to the second notch; when the elastic element is detachably sleeved on the second rod, the limiting piece is limited to the second notch.

[0029] Specifically, the connecting sleeve also includes a first baffle; the first baffle is disposed on the inner surface near the upper end of the cylinder, and the first baffle, the limiting groove and the sliding part are arranged sequentially along the inner circumference of the connecting sleeve; the first baffle protrudes radially along the connecting sleeve, and the protrusion height is greater than the protrusion height of the sliding part.

[0030] Specifically, the connecting sleeve has a release position relative to the elastic element; the connecting sleeve also includes:

[0031] A release groove is provided on the inner surface of the cylinder and is recessed towards the outer wall of the cylinder; the release groove extends along the inner circumference of the connecting sleeve and connects to the sliding part, and the limiting groove, the sliding part, and the release groove are arranged sequentially along the inner circumference of the connecting sleeve; wherein

[0032] The release groove, sliding part, and limiting groove are sequentially arranged on the inner surface of the connecting sleeve along the inner circumference of the connecting sleeve. When the connecting sleeve is rotated to the release position, the limiting piece is limited to the release groove, and the protrusion is separated from the locking part. When the connecting sleeve is disengaged from the release position, the sliding part abuts against the limiting piece, the limiting piece disengages from the release groove, and can slide relative to the sliding part during the rotation stroke of the connecting sleeve.

[0033] Specifically, the connecting sleeve also includes a second baffle; the second baffle is disposed on the inner surface near the upper end of the cylinder, and the second baffle, the release groove and the sliding part are arranged sequentially along the inner circumference of the connecting sleeve; the second baffle protrudes radially along the connecting sleeve, and the protrusion height is greater than the protrusion height of the sliding part.

[0034] Specifically, the connecting sleeve is configured to rotate clockwise from the release position to the locking position; the first baffle, the limiting groove, the sliding part, the release groove, and the second baffle are sequentially arranged on the inner surface of the cylinder in a clockwise direction.

[0035] Specifically, the first baffle, the limiting groove, the sliding part, the release groove, and the second baffle extend and connect to the upper end of the cylinder.

[0036] Specifically, the elastic element is sleeved on the outside of the second rod, the first rod is inserted into the inside of the second rod, and the connecting sleeve is sleeved on the outside of the elastic element and works with the outside of the second rod to clamp the elastic element; wherein, the connecting sleeve, the elastic element, the second rod and the first rod are sequentially sleeved from the outside to the inside.

[0037] The telescopic rod provided in this application can be effectively adjusted in length, thereby facilitating users to perform cleaning work on the work surface.

[0038] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0039] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the assembly state of the telescopic pole disclosed in this application;

[0041] Figure 2 This is another schematic diagram of the assembly state of the telescopic pole disclosed in this application.

[0042] Figure 3aThis is a schematic diagram and a partial enlarged view of the structure of the second rod disclosed in this application;

[0043] Figure 3b A schematic diagram of the structure of the elastic element provided in this application;

[0044] Figure 4 This is a schematic diagram and a partial enlarged view of the structure of the first rod disclosed in this application;

[0045] Figure 5 This is a schematic diagram and a partial enlarged view of the structure of the second rod disclosed in this application;

[0046] Figure 6 This application discloses a schematic diagram and a cross-sectional view of the connecting sleeve.

[0047] Figure 7 This is a schematic diagram and another cross-sectional view of the connecting sleeve disclosed in this application;

[0048] Figure 8 This is a cross-sectional view of the telescopic rod disclosed in this application in its assembled state, with the connecting sleeve in the locked position;

[0049] Figure 9 This is another cross-sectional view of the telescopic rod disclosed in this application in its assembled state, with the connecting sleeve in the locked position;

[0050] Figure 10 This is a cross-sectional view of the telescopic rod disclosed in this application in its assembled state, with the connecting sleeve in the released position;

[0051] Figure 11 This is a schematic diagram and a partial enlarged view of the relative positional relationship of the positioning grooves disclosed in this application. Detailed Implementation

[0052] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the protection scope of this utility model.

[0053] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] In a first aspect, this application provides a telescopic rod for use in a vacuum cleaner, comprising:

[0055] A first rod 10 and a second rod 20; the first rod 10 is inserted into the second rod 20 from the upper end of the second rod 20 and slides in contact with the inner surface of the second rod 20 so that the first rod 10 can slide relative to the second rod 20 along the length direction of the first rod 10; wherein, the outer wall of the first rod 10 is provided with a positioning tooth groove 101 along the length direction of the first rod 10;

[0056] The elastic element 30 is detachably sleeved on the outer wall of the second rod 20, and a part of the elastic element 30 is disposed on the outer side of the positioning tooth groove 101; the elastic element 30 can engage with the positioning tooth groove 101.

[0057] The connecting sleeve 40 is detachably sleeved on the outer wall of the second rod 20 and covers the outer side of the elastic member 30. The connecting sleeve 40 can rotate relative to the second rod 20 and the elastic member 30 to press against the elastic member 30, so that the elastic member 30 is engaged with the positioning tooth groove 101, so that the first rod 10 and the second rod 20 are locked relative to each other.

[0058] Specifically, refer to Figure 1 and Figure 4 The first rod 10 is inserted from top to bottom into the cavity formed by the second rod 20, and can slide relative to the second rod 20. (Refer to...) Figure 2 The elastic element 30 is engaged with the second rod 20 and protrudes towards the first rod 10. A portion of the protruding elastic element 30 interferes with the positioning groove 101 in the radial direction of the first rod 10. Through engagement with the positioning groove 101, it can maintain a certain degree of relative fixation between the first rod 10 and the second rod 20. Alternatively, external force can be applied to push the first rod 10, causing the elastic element 30 to deform and thus change the relative position of the first rod 10 and the second rod 20, thereby adjusting the length of the telescopic rod. (Refer to...) Figure 1The connecting sleeve 40 is sleeved on the outer wall of the second rod 20 and positioned at the upper end of the second rod 20. The connecting sleeve 40 covers the outside of the elastic member 30, allowing the connecting sleeve 40 to adjust its contact depth with the elastic member 30 by rotating relative to the second rod 20, thereby controlling the range of elastic deformation of the elastic member 30 along the radial direction of the first rod 10. It is understood that after the connecting sleeve 40 rotates to a certain angle, it presses the elastic member 30 against the positioning groove 101. The groove of the positioning groove 101 matches the shape of the protruding part of the elastic member 30, preventing relative movement between the first rod 10 and the second rod 20 along the length of the telescopic rod, thus fixing the length of the telescopic rod and facilitating user adjustment of the length of the handle on the working surface under different operating conditions.

[0059] In some embodiments, the elastic element 30 includes:

[0060] The elastic collar 301 is detachably clamped to the outer wall of the second rod 20;

[0061] The locking part 302 is integrally formed with the elastic collar 301; the locking part 302 is arranged along the length direction of the first rod 10; the locking part 302 is arranged on the outside of the positioning tooth groove 101 in its natural state; the locking part 302 can respond to the rotation of the connecting sleeve 40, be pressed against the positioning tooth groove 101 by the connecting sleeve 40 and keep engaged with the positioning tooth groove 101, so that the first rod 10 and the second rod 20 are relatively fixed.

[0062] Specifically, referring to Figure 3, Figure 3 shows the elastic element 30 provided in this application. The elastic element 30 is composed of a C-shaped elastic collar 301 and at least one locking portion 302 extending from the elastic collar 301. The elastic collar 301 and the locking portion 302 are integrally formed and are both capable of elastic deformation in response to external force. The elastic collar 301 is sleeved on the second rod 20 and remains relatively fixed to the second rod 20 in the length direction of the telescopic rod / the length direction of the second rod 20. The locking portion 302 extending from the elastic collar 301 is configured to extend from the direction of the second rod 20 toward the direction of the first rod 10. When the elastic element 30 is installed on the second rod 20, the locking portion 302 protrudes from the upper end of the second rod 20 along the length direction of the first rod 10. Figure 2 Figure 3 and Figure 10In its natural state, the locking part 302 surrounds the outer periphery of the positioning tooth groove 101 and abuts against the groove plate 111 of the positioning tooth groove 101. This prevents the first rod 10 from slipping into the inner cavity of the second rod 20 due to gravity, while also allowing the user to freely adjust and temporarily fix the length of the telescopic rod. Furthermore, in response to the rotation of the connecting sleeve 40, the locking part 302 is completely pressed against the groove plate 111 of the positioning tooth groove 101 by the connecting sleeve 40, preventing the locking part 302 from moving relative to the positioning tooth groove 101. Pulling or compressing relative to the length of the telescopic rod cannot force the locking part 302 to disengage from the positioning tooth groove 101. The locking part 302 is always engaged with the positioning tooth groove 101 to fix the length of the telescopic rod.

[0063] In some specific embodiments, two locking parts 302 are provided, and two positioning grooves 101 are provided corresponding to the two locking parts 302 to ensure the stability of the relative fixation between the first rod 10 and the second rod 20. When the elastic member 30 is sleeved on the second rod 20, the two locking parts 302 are arranged symmetrically to each other.

[0064] Specifically, the locking part 302 is configured as a spring wall with locking teeth. One end of the spring wall is connected to the elastic collar 301, and the spring wall extends from the connection point with the elastic collar 301 to the outside of the positioning tooth groove 101. The other end of the spring wall is provided with locking teeth, which can engage with the positioning tooth groove 101 to ensure that the first rod 10 can be locked with the second rod 20 through the locking part 302.

[0065] In some embodiments, the upper end of the second rod 20 is provided with a flange 201; the flange 201 protrudes outward relative to the outer wall of the second rod 20, and the elastic collar 301 is detachably disposed below the flange 201; the upper end of the second rod 20 is provided with a first notch 202, which is disposed on the outer periphery of the positioning tooth groove 101; the locking part 302 extends through the first notch 202 and is disposed on the outer side of the positioning tooth groove 101.

[0066] Specifically, refer to Figure 2 and Figure 5The upper end of the second rod 20 protrudes outward relative to its outer wall to form a flange 201. The flange 201 can block the elastic element 30 from falling off from the upper end of the second rod 20. A first notch 202 is formed inward from the outer wall of the upper end of the second rod 20. The first notch 202 is provided along the outer periphery of the second rod 20 in the left-right direction and along the length direction of the second rod 20 in the up-down direction, extending towards the length direction of the first rod 10. The first notch 202 extends towards the length direction of the first rod 10 until it connects with the flange 201, so that the outer peripheral surface of the second rod 20 forms a first notch 202 that is recessed downward from the flange 201 along its length direction. The first notch 202 serves as a window, exposing the positioning groove 101 of the overlapping portion of the first rod 10 and the second rod 20. The locking part 302 of the elastic member 30 connected to the outer wall of the second rod 20 extends along the length direction of the first rod 10 through the first notch 202 by the elastic collar 301 and covers the outer surface of the positioning groove 101. This ensures the stability of the connection between the elastic member 30 and the second rod 20 and also achieves the engagement of the locking part 302 of the elastic member 30 with the positioning groove 101.

[0067] In some embodiments, a first limiting ring 203 is provided along the outer periphery of the outer wall of the second rod 20; the first limiting ring 203 protrudes from the outer wall of the second rod 20; the first limiting ring 203 and the flange 201 together form a limiting area; the elastic collar 301 is detachably accommodated in the limiting area.

[0068] Specifically, refer to Figure 5 A first limiting ring 203 is provided protruding outward along the circumferential direction on the outer wall of the second rod 20. The first limiting ring 203 protrudes relative to the outer wall of the second rod 20, so that the elastic collar 301 of the elastic member 30 sleeved on the second rod 20 can be limited between the first limiting ring 203 and the flange 201, thereby preventing the elastic collar 301 from sliding relative to the second rod 20 along the length direction of the second rod 20, and thus preventing the first rod 10 and the second rod 20 from sliding when they are relatively fixed by the locking part 302 of the elastic member 30.

[0069] In some embodiments, a boss 204 is provided between the first limiting ring 203 and the flange 201, and the boss 204 protrudes outward relative to the outer wall of the second rod 20; the boss 204, the first limiting ring 203 and the flange 201 together form a limiting area, so that the elastic collar 301 is limited within the limiting area formed by the boss 204, the first limiting ring 203 and the flange 201.

[0070] Specifically, refer to Figure 5Between the flange 201 and the first limiting ring 203, the outer wall of the second rod 20 provided in this application is also provided with a boss 204 as shown in the figure. The boss 204 is disposed between the first limiting ring 203 and the flange 201 along the length direction of the second rod 20, and is respectively connected to the first limiting ring 203 and the flange 201. The elastic collar 301 is configured as a C-shaped structure, that is, a ring structure with an opening. When the elastic collar 301 is detachably connected between the first limiting ring 203 and the flange 201, the two ends of the elastic collar 301 along the circumferential direction of the outer wall of the second rod 20 respectively abut against the two sides of the boss 204, and are thus stably limited within the limiting area composed of the first limiting ring 203, the flange 201 and the boss 204. Since the limiting area is generally concave relative to the first limiting ring 203, the flange 201 and the boss 204, the elastic collar 301 of the elastic member 30 is blocked by the first limiting ring 203, the flange 201 and the boss 204, and is stably fixed within the limiting area, keeping the elastic member 30 and the second rod 20 relatively stationary, and avoiding the inability to fix the length of the telescopic rod due to the positional change of the elastic member 30.

[0071] In some embodiments, the boss 204 is provided with a first end 2041 and a second end 2042 along the length direction of the second rod 20; the elastic collar 301 is provided with a first edge 3011 and a second edge 3012 along the length direction of the second rod 20; the first edge 3011 of the elastic collar 301 is fitted to the first end 2041 of the boss 204, or the second edge 3012 of the elastic collar 301 is fitted to the second end 2042 of the boss 204; wherein;

[0072] When the elastic collar 301 is fitted onto the second rod 20, the central angle of the arc surface from the first edge 3011 to the second edge 3012 is greater than 180°.

[0073] Specifically, refer to Figure 3a The boss 204 protrudes from the surface of the second rod 20 along its circumference. The boss 204 has a first end 2041 and a second end 2042 at its two ends on the surface of the second rod 20. The first end 2041 and the second end 2042 can be parallel to each other and arranged along the length of the second rod 20. Furthermore, the elastic collar 301 has a first edge 3011 and a second edge 3012. When the elastic collar 301 is detachably sleeved on the side wall of the second rod 20, the first edge 3011 is attached to the first end 2041 or the second edge 3012 is attached to the second end 2042, so that the elastic collar 301 and the boss 204 are attached to each other along the circumference of the second rod 20 and the first end 2041 or the second end 2042, thereby ensuring that the elastic collar 301 can be prevented from rotating relative to the second rod 20 by abutting against the first end 2041 or the second end 2042 of the boss 204.

[0074] In some embodiments, in its natural state, the first edge 3011 to the second edge 3012 of the elastic collar 301 are separated from each other in the circumferential direction. The elastic collar 301 is capable of elastic deformation, such that the distance between the first edge 3011 and the second edge 3012 is greater than the outer diameter of the second rod 20, and is radially sleeved on the second rod 20, so that the first edge 3011 is fitted to the first end 2041 of the boss 204, and the second edge 3012 is fitted to the second end 2042 of the boss 204.

[0075] Specifically, refer to Figure 3b When the elastic collar 301 is fitted onto the second rod 20, the central angle corresponding to the arc surface of the first edge 3011 towards the second edge 3012 is set to be greater than 180°. This ensures that the distance between the first edge 3011 and the second edge 3012 of the elastic collar 301 fitted onto the second rod 20 is less than the diameter of the second rod 20, thereby preventing the elastic collar 301 from slipping outward radially along the second rod 20. Correspondingly, the central angle corresponding to the arc surface between the first end 2041 and the second end 2042 of the boss 204 is set to be less than 180°, and the sum of the angle values ​​of the first edge 3011 and the second edge 3012 and the arc surface is set to be less than or equal to 360°. This allows the elastic collar 301 to be engaged on the second rod 20 and positioned in the groove between the boss 204 and the first limiting ring 203 and the second limiting ring 208. It is understandable that when the elastic collar 301 is fitted onto the second rod 20, it undergoes elastic deformation compared to its natural state, making the distance between the first edge 3011 and the second edge 3012 greater than the distance in its natural state, thereby ensuring that the elastic collar 301 can be clamped onto the second rod 20.

[0076] Specifically, when the elastic collar 301 is fitted onto the second rod 20, the first end 2041 of the boss 204 is fitted with the first edge 3011 of the elastic collar 301, and the second end 2042 of the boss 204 is fitted with the second edge 3012 of the elastic collar 301. The elastic collar 301, fitted to the first end 2041 and the second end 2042 of the boss 204, is limited to both sides of the boss 204 along the outer periphery of the second rod 20, thereby preventing the elastic collar 301 from sliding circumferentially relative to the second rod 20. In some embodiments, the inner wall of the second rod 20 is provided with a first guide plate 205 and a second guide plate 206 protruding inward; the outer surface of the first rod 10 is provided with a first guide rail 102 in cooperation with the first guide plate 205, and a second guide rail 103 in cooperation with the second guide plate 206; the first rod 10 and the second rod 20 slide relative to each other through the mutual cooperation of the first guide plate 205 and the first guide rail 102, and through the mutual cooperation of the second guide plate 206 and the second guide rail 103.

[0077] Specifically, refer to Figures 1 to 5 as well as Figures 8 to 10 The inner wall of the second rod 20 protrudes inward to form two protruding guide plates, namely the first guide plate 205 and the second guide plate 206. A first guide rail 102 is provided in conjunction with the first guide plate 205, and a second guide rail 103 is provided in conjunction with the second guide plate 206. The first guide rail 102 and the second guide rail 103 are arranged parallel to each other on the outer surface of the first rod 10. The first guide rail 102 and the second guide rail 103 are recessed inward relative to the outer surface of the first rod 10. When the first rod 10 and the second rod 20 are connected, the first guide plate 205 is embedded in the first guide rail 102, and the second guide plate 206 is embedded in the second guide rail 103. When the first rod 10 and the second rod 20 slide along the length direction of the telescopic rod, the first guide plate 205 and the second guide plate 206 move relative to each other along the direction of the first guide rail 102 and the second guide rail 103. This ensures that when the first rod 10 and the second rod 20 slide relative to each other, movement will only occur along the length direction of the telescopic rod, avoiding mutual torsion of the first rod 10 and the second rod 20.

[0078] In some embodiments, the first guide plate 205 and the second guide plate 206 are respectively disposed on both sides of the first notch 202 along the circumference of the second rod 20; the first guide rail 102 is recessed relative to the outer surface of the first rod 10, and the second guide rail 103 is recessed relative to the outer surface of the first rod 10; a plurality of slot plates 111 are connected between the first guide rail 102 and the second guide rail 103 to form a positioning groove 101.

[0079] Specifically, refer to Figure 2 , Figure 4 , Figure 5 as well as Figure 8 A first guide plate 205 and a second guide plate 206 are provided on the left and right sides of the first notch 202, and the first guide plate 205 and the second guide plate 206 are arranged parallel to each other along the length direction of the first notch 202. Correspondingly, the circumferential distance between the first guide plate 205 and the second guide plate 206 is the same as the circumferential distance between the first guide rail 102 and the second guide rail 103. A plurality of slot plates 111 are connected between the first guide rail 102 and the second guide rail 103 along the outer circumferential direction of the first rod 10. The slot plates 111 are set in a tooth shape to form a plurality of tooth grooves of different depths, thereby providing a position for the locking part 302 to mesh with the tooth grooves. It is understandable that when the second rod 20 slides relative to the first rod 10 through the first guide plate 205 and the second guide plate 206, the first notch 202 can always expose the positioning tooth groove 101 covered by the overlapping part of the first rod 10 and the second rod 20, so that the locking part 302 fixed in the first notch 202 can engage with the positioning tooth groove 101 to fix the length of the telescopic rod.

[0080] In some specific implementation methods, refer to Figure 4 A guide groove 107 is provided below the positioning tooth groove 101 along its length direction. The guide groove 107 extends from the lower end of the first rod 10 toward the positioning tooth groove 101, and a first ramp 108 connects the guide groove 107 and the positioning tooth groove 101. The guide groove 107 is provided corresponding to the first guide plate 205 and the second guide plate 206. The width of the guide groove 107 is slightly wider than the width between the first guide plate 205 and the second guide plate 206, and the depth of the guide groove 107 along the radial direction of the first rod 10 is set to be greater than the maximum depth of the first guide rail 102 or the second guide rail 103. This facilitates the insertion of the first rod 10 into the upper end of the second rod 20, which is provided with the first guide plate 205 and the second guide plate 206, and guides the first guide plate 205 to connect to the first guide rail 102 and the second guide plate 206 to connect to the second guide rail 103 via the first ramp 108.

[0081] In some embodiments, the upper end of the connecting sleeve 40 is provided with a stiffener 401 along the length direction of the second rod 20; when the connecting sleeve 40 is detachably sleeved on the outer wall of the second rod 20, the stiffener 401 abuts against the flange 201 to limit the relative position of the connecting sleeve 40 and the second rod 20 in the length direction of the second rod 20.

[0082] Specifically, refer to Figure 6 and Figure 7 The stiffening rib 401 is disposed at the upper end of the connecting sleeve 40 and extends downward from the inner surface of the upper end. When the connecting sleeve 40 is fitted onto the outer wall of the second rod 20, the stiffening rib 401 acts as a limiting structure, abutting against the upper surface of the flange 201 of the second rod 20 to prevent further damage to the device caused by the connecting sleeve 40 moving downward.

[0083] In some embodiments, the connecting sleeve 40 is provided with a locking position relative to the elastic member 30; the connecting sleeve 40 includes:

[0084] When the cylinder 402 and the connecting sleeve 40 are sleeved on the outer wall of the second rod 20, the upper end of the cylinder 402 is located outside the first rod 10 and covers the end face of the second rod 20.

[0085] A protruding plate 403 is disposed on the inner surface of the cylinder 402 near the upper end and protrudes into the cylinder 402. When the connecting sleeve 40 is rotated to the locking position, the protruding plate 403 is disposed on the outside of the locking part 302 and protrudes toward the locking part 302. The protruding plate 403 abuts against the locking part 302 and presses the locking part 302 into the positioning tooth groove 101, so that the locking part 302 engages with the positioning tooth groove 101.

[0086] Specifically, refer to Figure 6 and Figure 7The main body of the connecting sleeve 40 is composed of a cylindrical body 402. The cylindrical body 402 is designed to be narrower at the top and wider at the bottom, so as to be fitted onto the second rod 20 and fit as closely as possible to the outer wall of the second rod 20. The upper side of the cylindrical body 402 is provided with an inwardly tapered end face, so that when the cylindrical body 402 is placed over the second rod 20, it can cover and contain the flange 201 of the connecting sleeve 40 and the second rod 20. The connecting sleeve 40 also includes at least one protruding plate 403. Taking any protruding plate 403 as an example, the protruding plate 403 is disposed on the inner surface of the upper end of the cylinder 402 and protrudes towards the inner side of the cylinder 402. The thickness of the protruding plate 403 gradually increases in the radial direction of the connecting sleeve 40 along the rotation direction of the connecting sleeve 40, so that the connecting sleeve 40 can rotate to make the protruding plate 403 gradually press against the locking part 302 until the connecting sleeve 40 rotates to the locking position, the protruding plate 403 locks the locking part 302, so that the locking part 302 engages with a certain tooth groove on the positioning tooth groove 101, thereby fixing the length of the telescopic rod.

[0087] It is understandable that the thickness of the convex plate 403 gradually increases in the radial direction of the connecting sleeve 40 along the rotation direction of the connecting sleeve 40. That is, the thickness of the convex plate 403 gradually increases from the inner surface of the cylinder 402 to the first thickness, and continues to extend along the circumference of the cylinder 402 while maintaining the first thickness. The sum of the first thickness, the thickness of the locking part 302 of the elastic member 30, and the radius of the first rod 10 should be equal to or slightly less than the radius of the cylinder 402 at the convex plate 403. This ensures that by rotating the connecting sleeve 40, the convex plate 403 can abut against the locking part 302 at the first thickness, thereby locking the locking part 302. At the same time, maintaining the thickness of the convex plate 403 at the first thickness prevents the convex plate 403 from overloading the locking part 302 and the positioning tooth groove 101, thus avoiding wear on the positioning tooth groove 101 and ensuring the service life of the telescopic rod.

[0088] In some embodiments, the inner surface of the cylinder 402 is provided with an inwardly protruding rotary thread 4021; the outer wall of the second rod 20 is provided with an outwardly protruding second limiting ring 208; when the connecting sleeve 40 is detachably sleeved on the outer wall of the second rod 20, the rotary thread 4021 is located below the second limiting ring 208. Specifically, refer to... Figure 5 and Figure 6 The inner surface of the cylinder 402 has an inwardly protruding rotary thread 4021. For example... Figure 6The rotating thread 4021 is divided into three discontinuous parts connected to the inner surface of the cylinder 402. The three parts of the rotating thread 4021 are arranged on the same circumference along the inner periphery of the cylinder 402. The rotating thread 4021 can also be set as a whole complete circumference, without specific limitation. Correspondingly, a second limiting ring 208 is provided on the outer wall of the second rod 20. The second limiting ring 208 protrudes from the outer wall of the second rod 20. When the connecting sleeve 40 is sleeved on the outer wall of the second rod 20, the rotating thread 4021 is engaged below the second limiting ring 208, so that even if the connecting sleeve 40 slides upward toward the second rod 20, it will be restricted by the contact between the second limiting ring 208 and the rotating thread 4021 and will not slip off from the upper end of the second rod 20.

[0089] In some specific embodiments, the vertical distance between the bottom of the stiffener 401 and the top of the rotating thread 4021 is slightly greater than the vertical distance between the upper surface of the flange 201 of the second rod 20 and the lower surface of the second limiting ring 208, so that the connecting sleeve 40 can be stably fitted onto the second rod 20 while reducing the assembly difficulty of the connecting sleeve 40 and the second rod 20.

[0090] In some embodiments, the elastic element 30 connecting sleeve 40 further includes:

[0091] The limiting groove 404 is provided on the inner surface of the cylinder 402 and is recessed towards the outer wall of the cylinder 402.

[0092] The sliding portion 405 extends along the inner circumference of the connecting sleeve 40 and connects to the limiting groove 404; the sliding portion 405 protrudes radially from the limiting groove 404 relative to the connecting sleeve 40; the sliding portion 405 is used for sliding contact with the limiting piece 303; wherein

[0093] When the connecting sleeve 40 is rotated to the locked position, the sliding part 405 disengages from the limiting piece 303, and the limiting piece 303 is limited in the limiting groove 404; when the connecting sleeve 40 is disengaged from the locked position, the sliding part 405 abuts against the limiting piece 303, the limiting piece 303 disengages from the limiting groove 404 and can slide relative to the sliding part 405 during the rotation stroke of the connecting sleeve 40.

[0094] Specifically, refer to Figure 8 and Figure 9The figure shows the relative positional relationship between the components when the connecting sleeve 40 rotates relative to the elastic member 30 to the locked position. The elastic member 30 is provided with a limiting piece 303, and a limiting groove 404 is provided on the inner surface of the connecting sleeve 40 to accommodate the limiting piece 303. When the connecting sleeve 40 rotates to the locked position, the limiting groove 404 can accommodate the limiting piece 303 and restrict the relative rotation of the limiting piece 303 relative to the limiting groove 404, thereby keeping the connecting sleeve 40 in the locked position. A sliding part 405 is provided connected to the limiting groove 404. The sliding part 405 is connected to the limiting groove 404 along the rotation direction of the connecting sleeve 40 and protrudes from the inner surface of the connecting sleeve 40 and the limiting groove 404. The sliding part 405 is used to slide in contact with the limiting piece 303 when the connecting sleeve 40 rotates relative to the second rod 20 and the elastic member 30. Understandably, when the limiting piece 303 falls from the sliding part 405 into the limiting groove 404, the connecting sleeve 40 is rotated to the locking position relative to the elastic member 30. The limiting piece 303 does not undergo elastic deformation within the limiting groove 404, but it undergoes elastic deformation when it abuts against the sliding part 405. Alternatively, the elastic deformation of the limiting piece 303 when it abuts against the sliding part 405 is greater than that when it is within the limiting groove 404. This ensures that the limiting piece 303 is more stable within the limiting groove 404 than when it abuts against the sliding part 405, thereby ensuring the relative fixing effect of the limiting groove 404 on the limiting piece 303.

[0095] In some embodiments, the upper end of the second rod 20 is provided with a flange 201; the second rod 20 is provided with a second notch 209, the second notch 209 is provided along the length direction of the second rod 20 and extends to the flange 201; the flange 201 protrudes relative to the second notch 209; when the elastic member 30 is detachably sleeved on the second rod 20, the limiting piece 303 is limited to the second notch 209.

[0096] Specifically, refer to Figure 2 and Figure 5 The second rod 20 has a second notch 209 that extends along the length of the second rod 20 towards the flange 201 until it connects with the flange 201. This allows the limiting piece 303 to extend towards the flange 201 through the second notch 209 when the elastic member 30 is fitted onto the second rod 20. The flange 201, connected to the second notch 209, restricts the limiting piece 303 from rotating circumferentially around the second rod 20. It is understood that the distance between the outer surface of the limiting piece 303 and the axis 112 of the second rod 20 should be less than or equal to the distance between the outermost radial edge of the flange 201 and the axis 112 of the second rod 20, so that the connecting sleeve 40 can be fitted onto the outside of the combination of the second rod 20 and the elastic member 30.

[0097] In some embodiments, the connecting sleeve 40 further includes a first baffle 406; the first baffle 406 is disposed on the inner surface near the upper end of the cylinder 402, and the first baffle 406, the limiting groove 404 and the sliding part 405 are arranged sequentially along the inner periphery of the connecting sleeve 40; the first baffle 406 protrudes radially along the connecting sleeve 40, and the protrusion height is greater than the protrusion height of the sliding part 405.

[0098] Specifically, refer to Figure 6 and Figure 7 The inner surface of the upper end of the cylinder 402 of the connecting sleeve 40 protrudes inward, and a first baffle 406, a limiting groove 404, and a sliding part 405 are arranged sequentially along the inner circumference of the connecting sleeve 40. The first baffle 406 protrudes more than the sliding part 405 relative to the inner surface of the cylinder 402. That is, the first baffle 406 protrudes radially along the connecting sleeve 40 and its protrusion height is greater than that of the sliding part 405. When the connecting sleeve 40 rotates relative to the elastic member 30, the limiting piece 303 rebounds through the sliding part 405 to the limiting groove 404 and is blocked by the first baffle 406, thereby preventing the limiting piece 303 from disengaging from the limiting groove 404. Understandably, the greater protrusion height of the first baffle 406 than that of the sliding part 405 ensures that even if the limit rebound is not timely, the limit piece 303 will be blocked by the first baffle 406 and fall into the limit groove 404, thereby preventing the connecting sleeve 40 from continuing to rotate and missing the locking position, which would cause the telescopic rod to fail to be locked in time.

[0099] In some embodiments, the connecting sleeve 40 is provided with a release position relative to the elastic member 30; the connecting sleeve 40 further includes:

[0100] A release groove 407 is provided on the inner surface of the cylinder 402 and is recessed towards the outer wall of the cylinder 402; the release groove 407 extends along the inner circumference of the connecting sleeve 40 and connects to the sliding part 405, and the limiting groove 404, the sliding part 405 and the release groove 407 are arranged sequentially along the inner circumference of the connecting sleeve 40; wherein

[0101] The release groove 407, the sliding part 405, and the limiting groove 404 are sequentially arranged on the inner surface of the connecting sleeve 40 along the inner circumference of the connecting sleeve 40. When the connecting sleeve 40 is rotated to the release position, the limiting piece 303 is limited in the release groove 407, and the protrusion 403 is separated from the locking part 302. When the connecting sleeve 40 is disengaged from the release position, the sliding part 405 abuts against the limiting piece 303, the limiting piece 303 is disengaged from the release groove 407, and can slide relative to the sliding part 405 during the rotation stroke of the connecting sleeve 40.

[0102] Specifically, refer to Figure 6 and Figure 7The connecting sleeve 40 is also provided with a release groove 407, which is recessed relative to the inner surface of the connecting sleeve 40. The release groove 407 and the limiting groove 404 are respectively provided at both ends of the sliding part 405 along the rotation direction of the connecting sleeve 40. That is, along the rotation direction of the connecting sleeve 40, the release groove 407, the sliding part 405, and the limiting groove 404 are sequentially provided on the inner circumference of the connecting sleeve 40. Corresponding to the release groove 407, the connecting sleeve 40 is also provided with a release position relative to the elastic member 30. When the connecting sleeve 40 is in the release position, the limiting piece 303 is limited within the release groove 407. At this time, the locking part 302 is separated from the protrusion 403 and maintains a certain distance, so that the locking part 302 can undergo elastic deformation, thereby ensuring that the locking part 302 can move relative to the positioning tooth groove 101 to change the length of the telescopic rod. When the limiting piece 303 disengages from the release groove 407, the sliding part 405 presses against the limiting piece 303, causing it to undergo elastic deformation. This allows the limiting piece 303, which has been deformed by the sliding part 405, to adhere to the sliding part 405 and slide in contact with the sliding part 405 during the rotational stroke of the connecting sleeve 40.

[0103] In some embodiments, the connecting sleeve 40 further includes a second baffle 408; the second baffle 408 is disposed on the inner surface near the upper end of the cylinder 402, and the second baffle 408, the release groove 407 and the sliding part 405 are arranged sequentially along the inner periphery of the connecting sleeve 40; the second baffle 408 protrudes radially along the connecting sleeve 40, and the protrusion height is greater than the protrusion height of the sliding part 405.

[0104] Specifically, refer to Figure 6 , Figure 7 and Figure 10 The connecting sleeve 40 is also provided with a second baffle 408, which is disposed on the inner surface of the cylinder 402 and protrudes from the inner surface of the cylinder 402. The second baffle 408, the release groove 407, and the sliding part 405 are arranged circumferentially on the inner surface of the cylinder 402 in sequence, so that the limiting piece 303 can respond to the rotation of the connecting sleeve 40, and be rebounded from the sliding part 405 to the release groove 407 in sequence, and blocked by the second baffle 408, thereby preventing the limiting piece 303 from slipping off the release groove 407. Understandably, the protrusion height of the second baffle 408 relative to the inner surface of the cylinder 402 is higher than the protrusion height of the sliding part 405 relative to the inner surface of the cylinder 402. This causes the elastic element 30 of the limiting piece 303 to not rebound in time, and the limiting piece 303 will also be blocked by the second baffle 408 and fall into the release groove 407, thereby preventing the connecting sleeve 40 from continuing to rotate, so that the connecting sleeve 40 can be correctly positioned in the release position, and thus effectively adjust the length of the telescopic rod.

[0105] In some embodiments, the connecting sleeve 40 is configured to rotate clockwise from the release position to the locking position; the first baffle 406, the limiting groove 404, the sliding part 405, the release groove 407, and the second baffle 408 are sequentially arranged on the inner surface of the cylinder 402 in a clockwise direction.

[0106] Specifically, refer to Figures 6 to 9 The first baffle 406, the limiting groove 404, the sliding part 405, the release groove 407, and the second baffle 408 are sequentially arranged on the inner surface of the connecting sleeve 40 in a clockwise direction. The limiting piece 303 is restricted to slide between the first baffle 406 and the second baffle 408, thereby switching between the release position and the locking position. Taking the connecting sleeve 40 rotating in a clockwise direction as an example, the initial position of the limiting piece 303 is set in the release position. At this time, the limiting piece 303 is set in the release groove 407, and the protrusion 403 is separated from the locking part 302 and maintains a certain distance. The second baffle 408 can block and prevent the connecting sleeve 40 from rotating in a counterclockwise direction. In response to the clockwise rotation of the connecting sleeve 40, the limiting plate 303 and the release groove 407 disengage and deform under the push of the sliding part 405, retracting inward to abut against the sliding part 405. The plate continues to slide and falls into the limiting groove 404, where it is blocked by the first baffle 406, preventing the connecting sleeve 40 from continuing to rotate clockwise. At this point, the connecting sleeve 40 rotates to the locking position, and the protrusion 403 presses against the locking part 302. The locking part 302 is blocked by the protrusion 403 and cannot move outward, thus achieving engagement between the locking part 302 and the positioning tooth groove 101, thereby fixing the length of the telescopic rod. The relationship between the components during the counterclockwise rotation process is similar to the above and will not be repeated here.

[0107] In some embodiments, the first baffle 406, the limiting groove 404, the sliding part 405, the release groove 407, and the second baffle 408 extend and are connected to the upper end of the cylinder 402.

[0108] Specifically, refer to Figure 6 The first baffle 406, the limiting groove 404, the sliding part 405, the release groove 407, and the second baffle 408 all extend upward along the inner surface of the cylinder 402 and are connected to the upper end of the cylinder 402. This effectively ensures the structural strength of the first baffle 406, the limiting groove 404, the sliding part 405, the release groove 407, and the second baffle 408, and avoids damage to the components when the connecting sleeve 40, the elastic element 30, and the second rod 20 rotate excessively.

[0109] In some embodiments, the elastic element 30 is sleeved on the outside of the second rod 20, the first rod 10 is inserted into the inside of the second rod 20, and the connecting sleeve 40 is sleeved on the outside of the elastic element 30 and works in conjunction with the outside of the second rod 20 to clamp the elastic element 30; wherein, the connecting sleeve 40, the elastic element 30, the second rod 20 and the first rod 10 are sequentially sleeved from the outside to the inside.

[0110] In some embodiments, the outer wall of the first rod 10 is provided with a positioning tooth groove 101 and a second positioning tooth groove 104 along the length direction of the first rod 10; the elastic member 30 extends from the elastic collar 301 toward the first rod 10 along the length direction of the first rod 10 and is provided with a locking part 302 and a second locking part 304; the locking part 302 is provided corresponding to the positioning tooth groove 101 and the second locking part 304 is provided corresponding to the second positioning tooth groove 104.

[0111] Specifically, refer to Figure 3. Figures 8 to 11 The first rod 10 is provided with a positioning tooth groove 101 and a second positioning tooth groove 104 along its length. The elastic member 30 is provided with a locking part 302 in cooperation with the positioning tooth groove 101 and a second locking part 304 in cooperation with the second positioning tooth groove 104. The locking part 302 extends along the length direction of the positioning tooth groove 101, that is, the length direction of the first rod 10. The second locking part 304 extends along the length direction of the second positioning tooth groove 104, that is, the length direction of the second rod 20. This ensures that the locking part 302 can always cover the outside of the positioning tooth groove 101 as the first rod 10 slides relative to the second rod 20, and also ensures that the second locking part 304 can always cover the outside of the second positioning tooth groove 104 as the first rod 10 slides relative to the second rod 20, thereby ensuring the length fixation of the telescopic rod.

[0112] In some embodiments, the positioning groove 101 and the second positioning groove 104 are symmetrically arranged about the axis 112 of the first rod 10; the elastic member 30 is detachably sleeved on the outer wall of the second rod 20, and when the first rod 10 is inserted into the second rod 20, the locking part 302 and the positioning groove 101 are symmetrically arranged about the axis 112 of the first rod 10, and the second locking part 304 and the second positioning groove 104 are symmetrically arranged.

[0113] It is understood that the telescopic rod provided in this application is composed of multiple nested components. Specifically, the first rod 10, as the innermost part of the telescopic rod, is wrapped around the center at the overlap of the components; the first rod 10 is a hollow structure so that the vacuum cleaner can suck or blow air from the working surface through the first rod 10. The second rod 20 wraps around the outer periphery of the first rod 10 and can be slidably disposed relative to the second rod 20, thereby providing extension and retraction of the telescopic rod in the length direction. The hollow portion of the second rod 20 and the first rod 10 are combined at the connection point to form an air channel, thereby ensuring that the vacuum cleaner body is connected to the second rod 20 and sucks or blows air from the working surface through the first rod 10. Furthermore, the elastic member 30 is detachably sleeved on the outside of the overlapping portion of the first rod 10 and the second rod 20 and engages with the positioning groove 101 of the first rod 10. Furthermore, the connecting sleeve 40 is fitted onto the second rod 20 and covers the outer periphery of the elastic member 30, so that the elastic member 30 is pressed against the positioning tooth groove 101 by the rotation of the connecting sleeve 40, thereby locking the relative position of the first rod 10 and the second rod 20. By setting the connecting sleeve 40, the elastic member 30, the second rod 20 and the first rod 10 to be sequentially fitted together from the outside to the inside of the telescopic rod, the telescopic rod provided in this application can effectively realize the modification and fixation of the length.

[0114] Specifically, refer to Figure 10 and Figure 11 The positioning groove 101 and the second positioning groove 104 are centrally symmetrically arranged about the axis 112 of the first rod 10. The elastic member 30 is provided with a locking part 302 and a locking part 304. When the elastic member 30 is engaged with the second rod 20, and when the first rod 10 is inserted into the second rod 20, the locking part 302 cooperates with the positioning groove 101 to cover the outer surface of the positioning groove 101, so that the locking part 302 fits against the positioning groove 101 in its natural state, and can undergo an outward elastic deformation in response to the mutual movement between the first rod 10 and the second rod 20. Similarly, the second locking part 304 cooperates with the second positioning groove 104 to cover the outer surface of the second positioning groove 104, so that the second locking part 304 fits against the second positioning groove 104 in its natural state, and can undergo an outward elastic deformation in response to the mutual movement between the first rod 10 and the second rod 20. This prevents free sliding between the first rod 10 and the second rod 20 when the connecting sleeve 40 is not locked, thus facilitating the adjustment of the telescopic rod length. The elastic member 30, equipped with a locking part 302 and a second locking part 304, and the first rod 10, equipped with a positioning groove 101 and a second positioning groove 104, effectively improve the stability of the telescopic rod.

[0115] Understandably, referring to Figure 11Similar to the first guide groove 107 and the first ramp 108, the second positioning tooth groove 104 is also provided with a second guide groove 109 and a second ramp 110. The second positioning tooth groove 104 is also provided with a third guide rail 105 and a fourth guide rail 106 on both sides, for engaging with the third guide plate 211 and the fourth guide plate 212 protruding from the second rod 20. The second guide groove 109 is provided corresponding to the third guide plate 211 and the fourth guide plate 212. The width of the second guide groove 109 is slightly wider than the width between the third guide plate 211 and the fourth guide plate 212. The depth of the second guide groove 109 along the radial direction of the first rod 10 is set to be greater than the maximum depth of the first guide rail 102 or the second guide rail 103. This facilitates the insertion of the first rod 10 into the upper end of the second rod 20, which is provided with the first guide plate 205, the second guide plate 206, the third guide plate 211 and the fourth guide plate 212. The third guide plate 211 is guided to the third guide rail 105 through the second ramp 110, and the fourth guide plate 212 is guided to the fourth guide rail 106 through the second ramp 110.

[0116] In some embodiments, the connecting sleeve 40 includes a first protruding plate 403 and a second protruding plate 409; the first protruding plate 403 is disposed on the inner surface of the connecting sleeve 40 and protrudes inward from the connecting sleeve 40; the second protruding plate 409 is disposed on the inner surface of the connecting sleeve 40 and protrudes inward from the connecting sleeve 40; wherein;

[0117] When the connecting sleeve 40 is rotated to the locking position, the first protrusion 403 abuts against the locking part 302 and presses the locking part 302 into the positioning tooth groove 101, so that the locking part 302 and the positioning tooth groove 101 are relatively fixed; and the second protrusion 409 abuts against the second locking part 304 and presses the second locking part 304 into the second positioning tooth groove 104, so that the second locking part 304 and the second positioning tooth groove 104 are relatively fixed.

[0118] Specifically, refer to Figure 9 Corresponding to the locking part 302 and the second locking part 304, the connecting sleeve 40 provided in this application is provided with a first protrusion 403 and a second protrusion 409. The first protrusion 403 is provided corresponding to the locking part 302, and the second protrusion 409 is provided corresponding to the second locking part 304. When the connecting sleeve 40 is rotated to the locked position, the highest point of the first protrusion 403 along the radial direction of the connecting sleeve 40 abuts against the locking part 302. At this time, the locking part 302 engages with the positioning tooth groove 101, and due to the obstruction of the first protrusion 403, the locking part 302 cannot disengage from the positioning tooth groove 101, thereby achieving relative fixation between the locking part 302 and the positioning tooth groove 101. At the same time, the second locking part 304 is similar to the locking part 302, and is unable to disengage from the second positioning tooth groove 104 due to the obstruction of the second protrusion 409. This ensures that when the connecting sleeve 40 is in the locked position, the locking part 302 is relatively fixed to the positioning tooth groove 101, and the second locking part 304 is relatively fixed to the second positioning tooth groove 104.

[0119] It is understood that the first protruding plate 403 is configured to cooperate with the locking part 302, the second protruding plate 409 is configured to cooperate with the second locking part 304, the locking part 302 is configured to cooperate with the positioning groove 101, and the second locking part 304 is configured to cooperate with the second positioning groove 104. The positioning groove 101 and the second positioning groove 104 are symmetrically arranged about the axis 112 of the first rod 10. That is, when the elastic member 30 is sleeved on the second rod 20, the connecting sleeve 40 is sleeved on the second rod 20, and the first rod 10 is inserted into the second rod 20, the locking part 302 and the second locking part 304 are also symmetrically arranged about the axis 112 of the first rod 10, and the first protruding plate 403 and the second protruding plate 409 are also symmetrically arranged about the axis 112 of the first rod 10.

[0120] In some embodiments, the second rod is provided with a plurality of anti-slip strips 210 along its length, such as Figure 1 or Figure 2 As shown in Figures 210a, 210b, and 210c. The anti-slip strip 210 is used to increase the friction between the user's hand and the second rod 20, making it easier for the user to operate and to twist the connecting sleeve 40.

[0121] It should be noted that, without conflict, all of the above technical features can be freely combined, and such free combination, simple variations, changes and modifications are all within the protection scope of this patent.

[0122] All the technical features of the above components can be freely combined without conflict, and such free combination or simple variations, changes and modifications are all within the protection scope of this patent.

[0123] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "yet another embodiment," "another embodiment," "other embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0124] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications and variations to the above embodiments within the scope of this application.

Claims

1. A telescopic rod for use in a vacuum cleaner, characterized in that, include: A first rod and a second rod; the first rod is inserted into the second rod from the upper end of the second rod and slides in contact with the inner surface of the second rod, so that the first rod can slide relative to the second rod along the length direction of the first rod; wherein, the outer wall of the first rod is provided with positioning grooves along the length direction of the first rod; An elastic element is detachably sleeved on the outer wall of the second rod, and a portion of the elastic element is disposed on the outside of the positioning tooth groove; the elastic element is capable of engaging with the positioning tooth groove. A connecting sleeve is detachably fitted onto the outer wall of the second rod and covers the outer side of the elastic member; the connecting sleeve is rotatable relative to the second rod and the elastic member to press against the elastic member, so that the elastic member is engaged with the positioning groove, thereby locking the first rod and the second rod relative to each other.

2. The telescopic rod according to claim 1, characterized in that, The elastic element includes: An elastic collar, which is detachably clamped to the outer wall of the second rod; The locking part is integrally formed with the elastic collar; the locking part is arranged along the length direction of the first rod; the locking part is disposed on the outside of the positioning tooth groove in its natural state; the locking part is responsive to the rotation of the connecting sleeve, and is pressed against the positioning tooth groove by the connecting sleeve and kept engaged with the positioning tooth groove, so that the first rod and the second rod are relatively fixed.

3. The telescopic rod according to claim 2, characterized in that, The upper end of the second rod is provided with a flange; the flange protrudes outward relative to the outer wall of the second rod, and the elastic collar is detachably provided below the flange; the upper end of the second rod is provided with a first notch, which is located on the outer periphery of the positioning tooth groove; the locking part extends through the first notch and is located on the outside of the positioning tooth groove.

4. The telescopic rod according to claim 3, characterized in that, The outer wall of the second rod is provided with a first limiting ring along its outer periphery; the first limiting ring protrudes from the outer wall of the second rod; the first limiting ring and the flange together form a limiting area; the elastic collar is detachably accommodated in the limiting area.

5. The telescopic rod according to claim 4, characterized in that, A boss is provided between the first limiting ring and the flange, and the boss protrudes outward relative to the outer wall of the second rod; the boss, the first limiting ring and the flange together form the limiting area, so that the elastic collar is limited within the limiting area formed by the boss, the first limiting ring and the flange.

6. The telescopic rod according to claim 5, characterized in that, The boss has a first end and a second end along the length of the second rod; the elastic collar has a first edge and a second edge along the length of the second rod; the first edge of the elastic collar is fitted to the first end of the boss, or the second edge of the elastic collar is fitted to the second end of the boss; wherein; When the elastic collar is fitted onto the second rod, the central angle of the arc surface of the elastic collar from the first edge to the second edge is greater than 180°.

7. The telescopic rod according to claim 6, characterized in that, In its natural state, the first edge and the second edge of the elastic collar are separated from each other in the circumferential direction. The elastic collar can undergo elastic deformation so that the distance between the first edge and the second edge is greater than the outer diameter of the second rod, and is radially fitted onto the second rod, so that the first edge is fitted to the first end of the boss and the second edge is fitted to the second end of the boss.

8. The telescopic rod according to claim 3, characterized in that, The inner wall of the second rod protrudes inward and is provided with a first guide plate and a second guide plate; the outer surface of the first rod is provided with a first guide rail in cooperation with the first guide plate and a second guide rail in cooperation with the second guide plate; the first rod and the second rod slide relative to each other through the cooperation of the first guide plate and the first guide rail, and through the cooperation of the second guide plate and the second guide rail.

9. The telescopic rod according to claim 8, characterized in that, The first guide plate and the second guide plate are respectively disposed on both sides of the first notch along the circumference of the second rod; the first guide rail is recessed relative to the outer surface of the first rod, and the second guide rail is recessed relative to the outer surface of the first rod; a plurality of slot plates are connected between the first guide rail and the second guide rail to form the positioning tooth groove.

10. The telescopic rod according to claim 3, characterized in that, The upper end of the connecting sleeve is provided with a rib along the length direction of the second rod; when the connecting sleeve is detachably sleeved on the outer wall of the second rod, the rib abuts against the flange to limit the relative position of the connecting sleeve and the second rod in the length direction of the second rod.

11. The telescopic rod according to any one of claims 2 to 10, characterized in that, The connecting sleeve is provided with a locking position relative to the elastic element; the connecting sleeve includes: When the connecting sleeve is fitted onto the outer wall of the second rod, the upper end of the cylinder is located on the outside of the first rod and covers the end face of the second rod. A convex plate is disposed on the inner surface of the cylinder near the upper end and protrudes into the cylinder; when the connecting sleeve is rotated to the locking position, the convex plate is disposed on the outside of the locking part and protrudes towards the locking part; the convex plate abuts against the locking part and presses the locking part into the positioning tooth groove, so that the locking part engages with the positioning tooth groove.

12. The telescopic rod according to claim 11, characterized in that, The inner surface of the cylinder is provided with an inwardly protruding rotary thread; the outer wall of the second rod is provided with an outwardly protruding second limiting ring; when the connecting sleeve is detachably sleeved on the outer wall of the second rod, the rotary thread is located below the second limiting ring.

13. The telescopic rod according to claim 11, characterized in that, The elastic element further includes a limiting piece; the connecting sleeve further includes: A limiting groove is provided on the inner surface of the cylinder and is recessed towards the outer wall of the cylinder; A sliding portion extends along the inner circumference of the connecting sleeve and connects to the limiting groove; the sliding portion protrudes radially from the limiting groove relative to the connecting sleeve; the sliding portion is used for sliding contact with the limiting piece; wherein... When the connecting sleeve rotates to the locking position, the sliding part disengages from the limiting piece, and the limiting piece is confined within the limiting groove; when the connecting sleeve disengages from the locking position, the sliding part abuts against the limiting piece, and the limiting piece disengages from the limiting groove and can slide relative to the sliding part during the rotational stroke of the connecting sleeve.

14. The telescopic rod according to claim 13, characterized in that, The upper end of the second rod is provided with a flange; the second rod is provided with a second notch, which is provided along the length direction of the second rod and extends to the flange; the flange protrudes relative to the second notch; when the elastic element is detachably sleeved on the second rod, the limiting piece is limited to the second notch.

15. The telescopic rod according to claim 13, characterized in that, The connecting sleeve further includes a first baffle; the first baffle is disposed on the inner surface near the upper end of the cylinder, and the first baffle, the limiting groove and the sliding part are arranged sequentially along the inner circumference of the connecting sleeve; the first baffle protrudes radially along the connecting sleeve, and the protrusion height is greater than the protrusion height of the sliding part.

16. The telescopic rod according to claim 15, characterized in that, The connecting sleeve is provided with a release position relative to the elastic element; the connecting sleeve further includes: A release groove is provided on the inner surface of the cylinder and recessed towards the outer wall of the cylinder; the release groove extends along the inner circumference of the connecting sleeve and connects to the sliding part, and the limiting groove, the sliding part, and the release groove are arranged sequentially along the inner circumference of the connecting sleeve; wherein The release groove, the sliding part, and the limiting groove are sequentially arranged on the inner surface of the connecting sleeve along the inner circumference of the connecting sleeve; when the connecting sleeve rotates to the release position, the limiting piece is limited to the release groove, and the protrusion separates from the locking part; when the connecting sleeve disengages from the release position, the sliding part abuts against the limiting piece, the limiting piece disengages from the release groove, and can slide relative to the sliding part during the rotation stroke of the connecting sleeve.

17. The telescopic rod according to claim 16, characterized in that, The connecting sleeve further includes a second baffle; the second baffle is disposed on the inner surface near the upper end of the cylinder, and the second baffle, the release groove and the sliding part are arranged sequentially along the inner circumference of the connecting sleeve; the second baffle protrudes radially along the connecting sleeve, and the protrusion height is greater than the protrusion height of the sliding part.

18. The telescopic rod according to claim 17, characterized in that, The connecting sleeve is configured to rotate clockwise from the release position to the locking position; the first baffle, the limiting groove, the sliding part, the release groove, and the second baffle are sequentially arranged on the inner surface of the cylinder in a clockwise direction.

19. The telescopic rod according to claim 18, characterized in that, The first baffle, the limiting groove, the sliding part, the release groove, and the second baffle extend and connect to the upper end of the cylinder.

20. The telescopic rod according to claim 1, applied to a vacuum cleaner, characterized in that, The elastic element is sleeved on the outside of the second rod, the first rod is inserted into the inside of the second rod, and the connecting sleeve is sleeved on the outside of the elastic element and works with the outside of the second rod to clamp the elastic element; wherein, the connecting sleeve, the elastic element, the second rod and the first rod are sequentially sleeved from the outside to the inside.

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