Telescopic tube device and vacuum cleaner having the same

Abstract

The present invention relates to a telescopic tube device, comprising a first tube, a second tube connected to the first tube in a relatively sliding manner, and an operating unit; the first tube is sleeved in the second tube; the operating unit is arranged at the sleeve joint of the first tube and the second tube; the operating unit comprises a first locking member, a second locking member and a limiting member; when the telescopic tube device is in a locked state, the limiting member is in an initial position, and the first locking member and the second locking member are kept engaged; when the telescopic tube device is in at least one released state, the limiting member deviates from the initial position, and the first locking member and the second locking member are released from the engagement; the operating unit further comprises at least one elastic member; when the limiting member is in the initial position, the elastic member gives the limiting member a pulling force, so that the limiting member has a tendency to remain in the initial position.

Description

Technical Field

[0001] The present invention relates to a telescopic tube device, in particular to a telescopic tube device for a vacuum cleaner. The present invention also relates to a vacuum cleaner having the telescopic tube device. Background Art

[0002] In the prior art, there is a telescopic tube device with two springs and two pushing directions to realize the telescopic tube telescopic function. For example, in Chinese utility model patent CN 201870570U, the spring is clamped between the positioning seat and the linkage part, and the two ends of the spring are not fixedly connected to the positioning seat or the linkage part, which means that the spring used is a compression spring, and compression springs are basically used in similar telescopic tube devices. However, the use of compression springs will cause the problem of compression spring instability. Compression spring instability means that when the load is too large, the compression spring will suddenly bend laterally, causing the stiffness of the compression spring to suddenly decrease. In the prior art, the compression spring is not fixed, but is only pressed against by two parts. During operation, when the push button is pushed too far, the compression spring on one side will become unstable, while the compression spring on the other side will return to its free length. The loss of restoring force can easily cause displacement. More importantly, in the phenomenon of compression spring instability, the height-to-diameter ratio is a parameter of compression spring stability. The height-to-diameter ratio (b) is the ratio of the free length (H0) of the compression spring to the middle diameter (d) of the compression spring. The middle diameter (d) of the compression spring refers to the average of the outer diameter (d1) and the inner diameter (d2) of the compression spring. The larger the height-to-diameter ratio (b), the easier it is for the compression spring to become unstable. However, in the telescopic tube device, the tube diameter will not be too large, that is, the height-to-diameter ratio of the compression spring will be relatively high. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a telescopic tube device with good stability.

[0004] To solve the above technical problems, a telescopic tube device comprises a first tube assembly, a second tube assembly connected to the first tube assembly in a relative sliding manner, and an operating unit, wherein the operating unit is arranged at the socket joint between the first tube assembly and the second tube assembly; the operating unit comprises an operating member, a first locking member, a second locking member, and a limiting member; wherein the first locking member is arranged on the first tube assembly and comprises at least two locking parts; the second locking member and the limiting member are arranged on the second tube assembly, and the second locking member is configured to selectively abut against and engage with any of the locking parts of the first locking member to limit the relative sliding between the first tube assembly and the second tube assembly; the limiting member is configured such that when the telescopic tube device is in a locked state, the limiting member is in an initial position, and the first locking member and the second locking member are kept engaged; when the telescopic tube device is in at least one released state, the limiting member deviates from the initial position, and the first locking member and the second locking member are released from the engagement; the operating unit further comprises at least one elastic member; when the limiting member deviates from the initial position, the elastic member gives a pulling force to the limiting member, so that the limiting member has a tendency to remain in the initial position.

[0005] As a specific implementation of the present invention, when the limiting member is located at the initial position or when the limiting member deviates from the initial position, the elastic member always applies a pulling force to the limiting member, so that the limiting member has a tendency to move toward the initial position.

[0006] As a specific implementation of the present invention, the elastic member is a coil spring.

[0007] As a specific embodiment of the present invention, the first tube assembly comprises a first tube body, a first tube first end sleeved with the second tube assembly, and a first tube second end opposite to the first tube first end; the second tube assembly comprises a second tube body, a second tube second end sleeved with the first tube assembly, and a second tube first end opposite to the second tube second end.

[0008] As a specific embodiment of the present invention, a first end sleeve is provided at the first end of the first tube, and the first end sleeve cooperates with the second tube assembly to limit the position to prevent the first tube assembly and the second tube assembly from detaching from each other during relative sliding; a second end sleeve is provided at the second end of the first tube, and the second end sleeve is connected to the handle assembly.

[0009] As a specific embodiment of the present invention, the second end of the second tube is provided with a liner fixedly connected to the second tube body, the liner is sleeved on the inner side of the second tube body near the second end of the second tube, and the outer diameter of the liner is smaller than the inner diameter of the second tube body.

[0010] As a specific embodiment of the present invention, the liner has a second end of the liner close to the second end of the second tube and a first end of the liner opposite to the second end of the liner, the outer peripheral surface of the liner is provided with a mating surface extending along its axial direction, and the end of the mating surface close to the first end of the liner is provided with a second groove, the second groove is constructed as a non-through groove that is roughly rectangular, and the bottom surface of the second groove is parallel to the mating surface but not on the same plane.

[0011] As a specific embodiment of the present invention, a third groove is provided on the bottom surface of the second groove, and the third groove is constructed as a through groove that penetrates the bottom surface of the second groove, and relative to the end of the second groove close to the second end of the liner, the third groove is closer to the end of the second groove close to the first end of the liner, and when the first pipe assembly and the second pipe assembly slide relatively, the third groove always corresponds to the first locking piece.

[0012] As a specific embodiment of the present invention, a first groove is provided on the second tube body, the first groove is close to the second end of the second tube, and is constructed as an elongated through groove penetrating the second tube body, and the length extension direction of the first groove is consistent with the extension direction of the axis L.

[0013] As a specific embodiment of the present invention, the operating member is constructed as a push button, and the push button is provided with a push button body. The shape of the push button body is adapted to the outer peripheral surface of the second tube body, and a second connecting portion is provided at a substantially center position of the surface of the push button body facing the second tube body, and the second locking member is fixedly connected to the second connecting portion; during the sliding process of the push button body, the second connecting portion is always within the range of the first groove.

[0014] As a specific implementation of the present invention, the limiting member is configured as a slider, and the slider can be embedded in the first groove and slide along the length direction of the first groove.

[0015] As a specific embodiment of the present invention, the second locking piece is configured as a locking block, which is installed in the third groove and can selectively slide along the radial direction of the telescopic tube device. When the first tube assembly and the second tube assembly do not slide relative to each other, the locking block engages with the first locking piece, so that the first tube assembly and the second tube assembly cannot slide relative to each other.

[0016] As a specific embodiment of the present invention, the elastic member includes a first spring and a second spring, the first spring and the second spring are coil springs of the same specifications, the first spring and the second spring are arranged in the first groove, and the first spring and the second spring are arranged on both sides of the limit member so that the limit member is located at the center position of the first groove, and the center position is the initial position of the limit member.

[0017] As a specific implementation of the present invention, when the limiting member is located at the initial position, the first spring and the second spring are in a stretched state; when the limiting member deviates from the initial position, the first spring and the second spring are always in a stretched state.

[0018] As a specific embodiment of the present invention, the first locking member is constructed as a strip-shaped slot band, and the locking portion is at least two locking grooves arranged on the slot band and basically arranged along the extension direction of the axis L, and the extension direction of the axis L is the radial direction of the first tube assembly and the second tube assembly.

[0019] As a specific embodiment of the present invention, an inter-groove portion is formed between two adjacent locking grooves, the slot band has a first surface and a second surface substantially parallel to the first surface, and the second surface of the slot band is in contact with the outer peripheral surface of the first tube body.

[0020] As a specific embodiment of the present invention, the second tube body is fixedly connected to the liner, and the position of the third groove roughly corresponds to the center of the first groove, the position of the second groove roughly corresponds to the position of the first groove, and the length extension direction of the second groove is the same as the length extension direction of the first groove.

[0021] The present invention also provides a vacuum cleaner comprising the telescopic tube device.

[0022] The technical effect that can be achieved by the present invention is that, when operating the telescopic tube, the technical problems caused by using a compression spring can be avoided: the push button is pushed too far, and the middle of the compression spring along the pushing direction bends laterally, that is, the compression spring becomes unstable, and after the other compression spring returns to its free length, its position is not fixed, resulting in positional displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a telescopic tube according to a specific embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of a telescopic tube according to a specific embodiment of the present invention from another viewing angle.

[0025] Figure 3 It is an exploded view of a telescopic tube according to a specific embodiment of the present invention.

[0026] Figure 4 It is a schematic diagram of a push button according to a specific embodiment of the present invention.

[0027] Figure 5 It is a schematic diagram of a slider according to a specific embodiment of the present invention.

[0028] Figure 6 It is a schematic diagram of a slider according to a specific embodiment of the present invention from another viewing angle.

[0029] Figure 7 It is a schematic diagram of a locking block according to a specific embodiment of the present invention.

[0030] Figure 8It is a schematic diagram of a locking block according to a specific embodiment of the present invention from another perspective.

[0031] Fig. 9 It is a schematic diagram of a telescopic tube according to a specific embodiment of the present invention, and the push button is hidden in the figure.

[0032] Fig.10 yes Fig. 9 Magnified view of area A in the middle, with the telescopic tube in the locked state.

[0033] Fig.11 yes Fig. 9 An enlarged view of the middle area A, the telescopic tube is in a first released state.

[0034] Fig.12 yes Fig. 9 An enlarged view of the middle area A, the telescopic tube is in the second released state.

[0035] Fig.13 It is a cross-sectional view of a telescopic tube according to a specific embodiment of the present invention.

[0036] Fig.14 yes Fig.13 Magnified view of area B in the middle, with the telescopic tube in the locked state.

[0037] Fig.15 yes Fig.13 An enlarged view of the middle area B, the telescopic tube is in a first released state.

[0038] Fig.16 yes Fig.13 An enlarged view of the middle area B, the telescopic tube is in the second released state.

[0039] Fig.17 yes Fig.14 Cross-sectional view along the PP line.

[0040] Fig.18 is a schematic diagram of a liner.

[0041] Fig.19 It is a schematic diagram of the second tube body and a partial enlarged diagram of the first groove.

[0042] Fig. 20 It is a schematic diagram of the slider locking the locking block in the locked state.

[0043] Fig.21 It is a schematic diagram showing another perspective of the slider locking the locking block in the locked state.

[0044] Fig. 22 It is a schematic diagram of the slider releasing the lock block in the second release state.

[0045] Fig.23It is a schematic diagram of another perspective of the slider releasing the lock block in the first release state / second release state. DETAILED DESCRIPTION

[0046] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0047] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0048] like Figure 1 to Figure 23 The figure shows a preferred embodiment of the telescopic tube device of the present invention. The telescopic tube device 1 comprises a first tube assembly 2, a second tube assembly 3 relatively slidably connected to the first tube assembly 2, and an operating unit 4.

[0049] The first tube assembly 2 is sleeved in the second tube assembly 3. In this embodiment, the first tube assembly 2 and the second tube assembly 3 have a radial central axis L, and the first tube assembly 2 and the second tube assembly 3 can slide relative to each other along the extension direction of the axis L. The first tube assembly 2 has a first tube body 21 made of metal, a first tube first end 201 sleeved with the second tube assembly 3, and a first tube second end 202 opposite to the first tube first end 201. The first tube first end 201 is provided with a first end sleeve 211, and the first end sleeve 211 cooperates with the second tube assembly 3 to limit the position, so as to prevent the first tube assembly 2 and the second tube assembly 3 from being separated from each other when sliding relative to each other. The first tube second end 202 is provided with a second end sleeve 212. The second end sleeve 212 is connected to a handle assembly 5 for the user to conveniently hold the telescopic tube device 1. The second tube assembly 3 has a second tube body 31 made of metal, a second tube second end 302 sleeved with the first tube assembly 2, and a second tube first end 301 opposite to the second tube second end 302.

[0050] The operating unit 4 is arranged at the socket joint of the first pipe assembly 2 and the second pipe assembly 3. The operating unit 4 comprises a first locking member, a second locking member and a limiting member; the first locking member is arranged on the first pipe assembly 2, the second locking member and the limiting member are arranged on the second pipe assembly 3, and the first locking member and the second locking member can be selectively engaged to limit the relative sliding between the first pipe assembly 2 and the second pipe assembly 3.

[0051] In this embodiment, the first locking member is constructed as follows Figure 2-3The strip-shaped slot belt 22 shown. Specifically, the slot belt 22 includes at least one concave locking groove 22b, and the slot belt 22 has a first surface and a second surface substantially parallel to the first surface. In this embodiment, the first surface of the slot belt 22 is provided with a plurality of concave locking grooves 22b distributed along its length direction, and an inter-groove portion 22a is formed between two adjacent locking grooves 22b. The second surface of the slot belt 22 is in contact with the outer peripheral surface of the first tube body 31, the slot belt 22 is relatively fixedly connected to the first tube body 21, and the length direction of the slot belt 22 is substantially consistent with the extension direction of the axis L. In other embodiments, the slot belt 22 and the first tube body 21 can be integrally arranged. In this embodiment, the locking groove 22b is configured as a strip-shaped slot extending in a direction perpendicular to the axis L. In other embodiments, the locking groove 22b can also be configured as a point-shaped slot.

[0052] In this embodiment, the second locking member is constructed as follows Figure 7-Figure 8 The locking block 44 shown in the figure is constructed as follows: Figure 5-6 The operating unit 4 also includes an operating member, which is configured as follows: Figure 3-4 The push button 41 is shown. Specifically, the second end 302 of the second tube is provided with a liner 32 fixedly connected to the second tube body 31, the liner 32 is sleeved on the inner side of the second tube body 31 near the second end 302 of the second tube, and the outer diameter of the liner 31 is smaller than the inner diameter of the second tube body 31, that is, there is a gap of width h1 between the outer circumference of the liner 32 and the inner circumference of the second tube body 31.

[0053] like Fig.18As shown, the liner 32 has a liner second end 3202 close to the second end of the second tube and a liner first end 3201 opposite to the liner second end 3202. The outer peripheral surface of the liner 32 is provided with a mating surface 321 extending along the axial direction thereof, and the end of the mating surface 321 close to the liner first end 3201 is provided with a second groove 322, the second groove 322 is configured as a substantially rectangular non-through groove, and the bottom surface of the second groove 322 and the mating surface 321 have a height difference h2. The bottom surface of the second groove 322 is provided with a third groove 323, the third groove 323 is configured as a through groove penetrating the bottom surface of the second groove 322, and the third groove 323 is closer to the end of the second groove 322 close to the liner first end 3201 than the end of the second groove 322 close to the liner second end 3202. When the first pipe assembly 2 and the second pipe assembly 3 slide relative to each other, the third groove 323 always corresponds to the clamping groove belt 22. Nut grooves 324 are symmetrically provided on both sides of the mating surface 321 perpendicular to the axis L. At least one rib 325 is also provided on the outer circumference of the liner 32. The rib 325 extends from the first end 3201 of the liner to the second end 3202 of the liner roughly along the axis L. The height of the rib 325 is equal to or slightly less than h1. When the liner 32 is fixedly connected to the second tube body 31, the rib 325 is located in the gap between the outer circumference of the liner 32 and the inner circumference of the second tube body 31, thereby enhancing the connection stability and preventing the relative shaking between the liner 32 and the second tube body 31.

[0054] like Fig.19As shown, a first groove 311 is provided on the tube wall of the second tube body 31 near the second end 302 of the second tube. The first groove 311 is configured as an elongated through groove penetrating the tube wall of the second tube body 31, and the length extension direction of the first groove 311 is consistent with the extension direction of the axis L. Screw holes 314 are symmetrically provided on both sides of the first groove 311 along the circumference of the second tube body 31. When the liner 31 and the second tube body 31 are fixedly connected by screws 315, the screws pass through the second tube body 31 and are threadedly connected with the nut groove 324. In this embodiment, a nut is fixedly provided in the nut groove 324. In other embodiments, the inner circumferential wall of the nut groove 324 is provided with threads. In other embodiments, the liner 31 and the second tube body 31 can also be fixedly connected together by other well-known forms, such as riveting, gluing, etc., or can be integrally formed. In this embodiment, when the liner 31 is fixedly connected to the second tube body 31, the position of the third groove 323 is approximately corresponding to the center of the first groove 311, the position of the second groove 322 is approximately corresponding to the position of the first groove 311, and the length extension direction of the second groove 322 is the same as the length extension direction of the first groove 311. In this embodiment, the first groove 311 and the second groove 322 are both rectangular, the geometric center of the first groove 311 corresponds to the geometric center of the second groove 322, the width of the first groove 311 along the circumference of the second tube body 31 is smaller than the width of the second groove 322 along the circumference of the second tube body 31, that is, the orthographic projection of the first groove 311 falls inside the orthographic projection of the second groove 322. In this embodiment, a pair of convex strips 313 are symmetrically provided on the outer circumferential surface of the second tube body 31 on both sides of the first groove 311 along the circumference of the second tube body 31. The length extension direction of the convex strips 313 is the same as the extension direction of the axis L. The convex strip 313 may be integrally formed with the second tube body 31 , or may be an independent part fixedly connected to the outer circumference of the second tube body 31 .

[0055] like Figure 3-4 , Fig.17 As shown, the push button 41 has a push button body 411 with an arc-shaped cross section, and the shape of the push button body 411 is adapted to the outer peripheral surface of the second tube body 31. The first connecting portion 4111 is symmetrically provided on the opposite sides of the push button body 411. Specifically, the first connecting portion 4111 is configured as an inner flange having an edge of the push button body 411, extending approximately along the radial direction of the second tube body 31 and toward the axis L. The first connecting portion 4111 is engaged with the convex strip 313, limiting the push button 41 to slide on the outer peripheral surface of the second tube body 31 along the extending direction of the axis L. A second connecting portion 412 is provided at a substantially central position of the surface of the push button body 411 facing the second tube body 31, and the second connecting portion 412 is configured as a protrusion extending from the surface of the push button body 411 facing the second tube body 31, approximately along the radial direction of the second tube body 31 and toward the axis L. During the sliding process of the push button body 411, the second connecting portion 412 is always within the range of the first groove 31.

[0056] like Figure 3, Figure 5-6 , Fig.17 As shown, the slider 42 is installed in the first groove 311, and the width of the slider 42 along the width extension direction of the first groove 311 is slightly smaller than the width of the first groove 311, so that the slider 42 can be embedded in the first groove 311 and slide along the length direction of the first groove 311. The slider 42 has a first slider surface 4201 that is substantially flat and a second slider surface 4202 that is opposite to the first slider surface 4201. The first slider surface 4201 faces the liner 32, and the second slider surface 4202 faces the push button 41. The slider 42 body is symmetrically provided with a third connecting portion 4211 and a fourth connecting portion 4212 on both sides along the length extension direction of the first groove 311, and the third connecting portion 4211 and the fourth connecting portion 4212 are configured as hollow rings. The body of the slider 42 is symmetrically provided with wings 4221 on both sides along the width extension direction of the first slot 311. The wings 4211 are configured as protrusions that are roughly coplanar with the first surface 4201 of the slider and extend in a direction away from the slider 42, so that the maximum width of the slider 42 along the width extension direction of the first slot 311 is greater than the width of the first slot 311. When the slider 42 is mounted on the second tube body 31, the wings 4221 contact the inner circumference of the second tube body 31 to prevent the slider 42 from being separated from the first slot 311 in a direction away from the axis L. In this embodiment, the two edges of the wings 4221 along the length extension direction of the first slot 311 are provided with a first wing inclined surface 4221a and a second wing inclined surface 4221b, and the thickness of the first wing inclined surface 4221a and the second wing inclined surface 4221b gradually decrease from the center to the edge. A fifth connection portion 4203 is provided at the approximate geometric center of the second surface 4202 of the slider, and the fifth connection portion 4203 is configured as a groove, and the shape and size of the groove are adapted to the shape and size of the second connection portion 412. In this embodiment, the second connection portion 412 can be inserted into the fifth connection portion 4203, and when the push button 41 is pushed by the user to slide along the axial direction of the second tube 31, the push button 41 drives the slider 42 to slide in the first groove 311 through the matching of the second connection portion 412 and the fifth connection portion 4203.

[0057] like Figure 3 , Figure 7-Figure 8 , Fig.17As shown, the locking block 44 is installed in the third groove 323 and can selectively slide in the radial direction of the telescopic tube device 1. The body of the locking block 44 has a first locking block surface facing the slot band 22. In this embodiment, the first surface of the locking block is provided with a first protrusion 4411 and a second protrusion 4412 in parallel. The first protrusion 4411 and the second protrusion 4412 are constructed as strip-shaped protrusions extending in a direction perpendicular to the extension direction of the axis L, and a strip-shaped recess 442 extending in a direction perpendicular to the extension direction of the axis L is formed between the first protrusion 4411 and the second protrusion 4422. A first protrusion inclined surface 4411a is provided on the side of the first protrusion 4411 away from the recess 442, and a second protrusion inclined surface 4412a is provided on the side of the second protrusion 4412 away from the recess 442. As shown in FIG. Fig.14 As shown, when the first tube assembly 2 and the second tube assembly 3 do not slide relative to each other, the locking block 44 engages with the slot band 22. Specifically, the first convex portion 4411 and the second convex portion 4412 are engaged in two adjacent locking grooves 22b, and the inter-groove portion 22a between the two adjacent locking grooves 22b is engaged in the recess 442. If the locking block 44 is limited, then due to the engagement between the locking block 44 and the slot band 22, the first tube assembly 2 and the second tube assembly 3 cannot slide relative to each other. If the locking block 44 is not limited and can slide along the radial direction of the telescopic tube device 1 in a direction away from the axis L, so that the locking block 44 is disengaged from the slot band 22, then the first tube assembly 2 and the second tube assembly 3 can slide relative to each other. In other embodiments, one, three or more strip-shaped protrusions can also be provided. The body of the locking block 44 is symmetrically provided with convex edges 440 on both sides perpendicular to the extending direction of the axis L, and the convex edges 440 extend in a direction away from the first surface of the locking block. The convex edge 440 has a first convex edge slope 4401a and a second convex edge slope 4401b at both ends along the extension direction of the axis L. The slope of the first convex edge slope 4401a matches the slope of the second wing slope 4221b, and the slope of the second convex edge slope 4401b matches the slope of the first wing slope 4221a.

[0058] The operating unit 4 also includes at least one elastic member; when the limit member deviates from the initial position, the elastic member always gives the limit member a pulling force, so that the limit member has a tendency to move toward the initial position. In this embodiment, the elastic member includes a first spring 431 and a second spring 432. Among them, the first spring 431 and the second spring 432 are constructed as spiral springs of the same specifications, the first spring 431 has a first spring first connecting portion 431a and a first spring second connecting portion 431b arranged at both ends thereof, and the second spring 432 has a second spring second connecting portion 432a and a second spring second connecting portion 431b arranged at both ends thereof. The first spring first connecting portion 431a, the first spring second connecting portion 431b, the second spring first connecting portion 432a and the second spring second connecting portion 432b are all constructed as hook structures. The first spring 431 is arranged in the first slot 311 and is located between the first hole 3121 and the third connecting portion 4211. The first connecting portion 431a of the first spring is connected to the first hole 3121, and the second connecting portion 341b of the first spring is connected to the third connecting portion 4211. The second spring 432 is arranged in the first slot 311 and is located between the second hole 3122 and the fourth connecting portion 4212. The second connecting portion 432a of the second spring is connected to the fourth connecting portion 4212, and the second connecting portion 432b of the second spring is connected to the second hole 3122. Since the specifications of the first spring 431 and the second spring 432 are the same, the slider 42 will be located at the center position of the first slot 311, that is, the initial position of the slider 42. In this embodiment, when the slider 42 is located at the initial position, the first spring 431 and the second spring 432 are in a stretched state, that is, the first spring 431 and the second spring 432 give the slider 42 equal and opposite pulling forces. Further preferably, when the slider 42 deviates from the initial position, the first spring 431 and the second spring 432 are always in a stretched state.

[0059] When the telescopic tube device is in a locked state, the limiter is in an initial position, and the first locking member and the second locking member remain engaged; when the telescopic tube device is in at least one released state, the limiter deviates from the initial position, and the first locking member and the second locking member are released from engagement.

[0060] For the convenience of description, the operation process of the telescopic tube device 1 of this embodiment is described in the orientation shown in the accompanying drawings. The "upper", "lower", "left" and "right" mentioned below all refer to the orientation shown in the drawings and do not limit the technical solution of the present invention.

[0061] In this embodiment, when the slider 42 is located at the initial position, Fig.10 , Fig.14 , Fig.17 , Fig. 20 , Fig.21As shown, the position of the slider 42 corresponds to the third groove 323, and the wing 4221 abuts against the convex edge 440, so that the slider 44 limits the locking block 42, so that the locking block 42 cannot slide in the radial direction away from the slot band 22 along the telescopic tube device 1, and the locking block 42 and the slot band 22 remain in a clamping state. At this time, relative sliding cannot be achieved between the first tube assembly 2 and the second tube assembly 3.

[0062] When no operation is performed, the telescopic tube device 1 remains locked. When the user needs to retract the telescopic tube device 1, he holds the first tube assembly 2 with one hand (usually holds the handle assembly 5 tightly) and pushes the push button 41 with the other hand to slide it to the left (towards the direction close to the first tube assembly 2). Fig.11 , Fig.15 , Fig. 22 , Fig.23 As shown. The push button 41 drives the slider 42 to slide to the left in the first groove 311. In the process of the slider 42 sliding to the left, the pulling force of the first spring 431 on the slider 42 increases, and the pulling force of the second spring 432 on the slider 42 decreases, that is, the combined force of the first spring 431 and the second spring 432 on the slider 42 is directed to the right and gradually increases. In the process of the slider 42 sliding to the left, the slider 42 gradually deviates from its initial position, and gradually makes way for the locking block 44 to slide downward in the third groove 322. After the push button 41 slides to the left to the left limit position (the left limit position can be defined by the sliding connection structure of the push button 41, the sliding connection structure of the slider 42, the length of the first groove 311, or the shortest length of the first spring 431 and the second spring 432), the user continues to apply force to the push button 41 to make it slide to the left. At this time, since the sliding of the push button 41 is limited, the operating unit 4 transmits force to the second tube assembly 3, so that it has a tendency to slide along the axis L toward the direction close to the handle assembly 5. Since the limit of the lock block 44 is released at this time, the left side of the first protrusion 4411 and the second protrusion 4412 is subjected to the reaction force of the lock groove 22b and the inter-groove portion 22b, so that the engagement between the lock block 44 and the card slot belt 22 is released, and the lock block 44 slides downward along the third groove 323, so that the first tube assembly 2 and the second tube assembly 3 can slide relative to each other, and the telescopic tube device 1 is in the first release state. The user continues to apply force to the push button 41 to make it slide to the left, so that the first tube assembly 2 and the second tube assembly 3 can be relatively contracted. When the contraction reaches a suitable length, the user releases the force on the push button 41. At this time, under the action of the first spring 431 and the second spring 432, the slider 42 slides to the initial position, and the first inclined surface 4221a of the wing portion applies a rightward force to the second inclined surface 4401b of the convex edge, pushing the lock block 44 to slide upward along the third groove 323 and then engage with the card slot belt 22. When the slider 42 returns to the initial position, the wing 4221 abuts against the convex edge 440, so that the locking block 44 remains engaged with the slot band 22, and the telescopic tube device returns to the locked state.

[0063] When the user needs to extend the telescopic tube device 1, he holds the first tube assembly 2 with one hand (usually holds the handle assembly 5 tightly), and pushes the push button 41 with the other hand to make it slide to the right (away from the first tube assembly 2). Fig.12 , Fig.16 As shown. The push button 41 drives the slider 42 to slide rightward in the first groove 311. In the process of the slider 42 sliding to the right, the pulling force of the second spring 432 on the slider 42 increases, and the pulling force of the first spring 431 on the slider 42 decreases, that is, the combined force of the first spring 431 and the second spring 432 on the slider 42 is directed to the left and gradually increases. In the process of the slider 42 sliding to the right, the slider 42 gradually deviates from its initial position, and gradually makes way for the locking block 44 to slide downward in the third groove 322. After the push button 41 slides to the right to the right limit position (the right limit position can be defined by the sliding connection structure of the push button 41, the sliding connection structure of the slider 42, the length of the first groove 311, or the shortest length of the first spring 431 and the second spring 432), the user continues to apply force to the push button 41 to make it slide to the right. At this time, since the sliding of the push button 41 is limited, the operating unit 4 transmits force to the second tube assembly 3, so that it has a tendency to slide along the axis L in the direction away from the handle assembly 5. Since the limit of the lock block 44 is released at this time, the right side of the first protrusion 4411 and the second protrusion 4412 are subjected to the reaction force of the lock grooves 22a and 22b, so that the engagement between the lock block 44 and the card slot belt 22 is released, and the lock block 44 slides downward along the third groove 323, so that the first tube assembly 2 and the second tube assembly 3 can slide relative to each other, and the telescopic tube device 1 is in the first release state. The user continues to apply force to the push button 41 to make it slide to the right, so that the first tube assembly 2 and the second tube assembly 3 can be relatively extended. When the extension reaches a suitable length, the user releases the force on the push button 41. At this time, under the action of the first spring 431 and the second spring 432, the slider 42 slides to the initial position, and the second inclined surface 4221b of the wing portion applies a leftward force to the first inclined surface 4401a of the convex edge, pushing the lock block 44 to slide upward along the third groove 323 and then engage with the card slot belt 22. When the slider 42 returns to the initial position, the wing 4221 abuts against the convex edge 440, so that the locking block 44 remains engaged with the slot band 22, and the telescopic tube device returns to the locked state.

[0064] When using the telescopic tube device 1 of the present invention, the user only needs to continuously push the push button 4 in the direction in which the second tube assembly 3 is expected to move to complete the telescopic operation of the telescopic tube device 1. At the same time, the operating unit 4 of the telescopic tube device 1 of the present invention uses a tension spring, and the two ends of the tension spring are hooked at the two ends of the same horizontal plane. First, it is not easy to be dislocated from its position, and second, the tension direction of the tension spring is along a horizontal line, and relative compression is generated under the action of the restoring force, and there is a tendency to return to the natural state, and the instability phenomenon of offset bending that is easy to occur when using a compression spring will not occur. At the same time, the slender shape of the tension spring itself determines that it is more suitable for the locking device of the telescopic tube. Furthermore, compared with the compression spring, the installation of the tension spring is more convenient and quick.

[0065] The present invention also provides another embodiment, a vacuum cleaner, comprising the telescopic tube device 1 described above.

[0066] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0067] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A telescopic tube device, comprising a first tube assembly, a second tube assembly slidably connected to the first tube assembly, and an operating unit, wherein the operating unit is arranged at the socket joint of the first tube assembly and the second tube assembly; the operating unit comprises an operating member, a first locking member, a second locking member, and a limiting member; wherein: The first locking member is disposed on the first pipe assembly and includes at least two locking portions; The second locking member and the limiting member are arranged on the second pipe assembly, and the second locking member is configured to selectively abut against and engage with any locking portion of the first locking member to limit relative sliding between the first pipe assembly and the second pipe assembly; The limiting member is configured such that when the telescopic tube device is in a locked state, the limiting member is in an initial position, and the first locking member and the second locking member remain engaged; when the telescopic tube device is in at least one released state, the limiting member deviates from the initial position, and the first locking member and the second locking member are released from engagement; The operating unit further comprises at least one elastic member; when the limiting member deviates from the initial position, the elastic member applies a pulling force to the limiting member, so that the limiting member tends to remain in the initial position; The first pipe assembly comprises a first pipe body, a first pipe first end sleeved with the second pipe assembly, and a first pipe second end opposite to the first pipe first end; The second pipe assembly comprises a second pipe body, a second pipe second end sleeved with the first pipe assembly, and a second pipe first end opposite to the second pipe second end; The second end of the second tube is provided with a liner tube fixedly connected to the second tube body, the liner tube is sleeved on the inner side of the second tube body close to the second end of the second tube, and the outer diameter of the liner tube is smaller than the inner diameter of the second tube body; The liner has a second end of the liner close to the second end of the second tube and a first end of the liner opposite to the second end of the liner, the outer peripheral surface of the liner is provided with a matching surface extending in the axial direction thereof, and one end of the matching surface close to the first end of the liner is provided with a second groove, the second groove is configured as a substantially rectangular non-through groove, and the bottom surface of the second groove is parallel to the matching surface but not on the same plane; A third groove is provided on the bottom surface of the second groove, and the third groove is configured as a through groove penetrating through the bottom surface of the second groove; The second tube body is provided with a first groove, the first groove is close to the second end of the second tube, and is configured as an elongated through groove penetrating the second tube body, and the length extension direction of the first groove is consistent with the extension direction of the axis, and the axis is the radial center axis of the first tube assembly and the second tube assembly; The second locking piece is configured as a locking block, which is installed in the third groove and can selectively slide along the radial direction of the telescopic tube device. When the first tube assembly and the second tube assembly do not slide relative to each other, the locking block engages with the first locking piece, so that the first tube assembly and the second tube assembly cannot slide relative to each other.

2. The telescopic tube device according to claim 1, characterized in that: The elastic member is a coil spring.

3. The telescopic tube device according to claim 1, characterized in that: A first end sleeve is provided at the first end of the first tube, and the first end sleeve cooperates with the second tube assembly to limit the position to prevent the first tube assembly and the second tube assembly from separating from each other during relative sliding; a second end sleeve is provided at the second end of the first tube, and the second end sleeve is connected to the handle assembly.

4. The telescopic tube device according to claim 1, characterized in that: The third groove is closer to the second end of the liner relative to the second groove, and is closer to the first end of the liner. When the first pipe assembly and the second pipe assembly slide relative to each other, the third groove always corresponds to the first locking piece.

5. The telescopic tube device according to claim 1, characterized in that: The operating member is constructed as a push button, which is provided with a push button body. The shape of the push button body is adapted to the outer peripheral surface of the second tube body. A second connecting portion is provided at a substantially central position of the surface of the push button body facing the second tube body, and the second locking member is fixedly connected to the second connecting portion. During the sliding process of the push button body, the second connecting portion is always within the range of the first groove.

6. The telescopic tube device according to claim 1, characterized in that: The limiting member is configured as a sliding block, and the sliding block can be embedded in the first groove and slide along the length direction of the first groove.

7. The telescopic tube device according to claim 1, characterized in that: The elastic member includes a first spring and a second spring, the first spring and the second spring are coil springs of the same specification, the first spring and the second spring are arranged in the first groove, and the first spring and the second spring are arranged on both sides of the limiting member so that the limiting member is located at the center position of the first groove, and the center position is the initial position of the limiting member.

8. The telescopic tube device according to claim 7, characterized in that: When the limiting member is located at the initial position, the first spring and the second spring are in a stretched state; When the limiting member deviates from the initial position, the first spring and the second spring are always in a stretched state.

9. The telescopic tube device according to any one of claims 1 to 4, characterized in that: The first locking member is configured as a strip-shaped slot band, and the locking portion is configured as at least two locking grooves arranged on the slot band and substantially arranged along the extension direction of the radial central axis.

10. The telescopic tube device according to claim 9, characterized in that: An inter-groove portion is formed between two adjacent locking grooves. The slot band has a first surface and a second surface opposite to the first surface and substantially parallel to the first surface. The second surface of the slot band is in contact with the outer peripheral surface of the first tube body.

11. The telescopic tube device according to claim 4, characterized in that: The second tube body is fixedly connected to the liner, and the position of the third groove roughly corresponds to the center of the first groove, the position of the second groove roughly corresponds to the position of the first groove, and the length extension direction of the second groove is the same as the length extension direction of the first groove.

12. A vacuum cleaner, characterized in that: The vacuum cleaner comprises the telescopic tube device according to any one of claims 1 to 11.

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