Device with telescopic tube

Abstract

The utility model relates to the technical field of household appliances, and discloses a device with a telescopic pipe, which comprises a main body, a handle; the first end of the telescopic pipe is fixedly connected with the main body, the second end of the telescopic pipe is fixed in the handle, the telescopic pipe comprises a plurality of pipe bodies which are sequentially arranged in a sleeved mode, each pipe body is provided with a locking hole, the telescopic pipe has a complete extending state, a partial extending state and a complete retracting state, and when the telescopic pipe is in the partial extending state or the complete retracting state, the locking hole is locked. The locking holes in the pipe body which does not extend out are aligned; the switch assembly comprises a locking pin, the locking pin is movably arranged on the handle, the locking pin has a locking state and an unlocking state, in the unlocking state, the locking pin leaves at least one locking hole in the pipe body which does not extend out, and in the locking state, the locking pin is inserted into the locking hole in the pipe body which does not extend out; and the gear adjusting assembly is arranged on the handle and used for limiting the moving stroke of the locking pin, and the number of the locking holes where the locking pin leaves is different under different gears in the unlocking state.

Description

Technical Field

[0001] The utility model relates to the technical field of household electrical appliances, in particular to a device with a telescopic tube. Background Art

[0002] Mite removal devices are cleaning devices used to remove dust, mites and other allergens from textile items such as beds, sofas, carpets, and clothing. Mite removal cleaning devices generally include a host and a grip handle, wherein the host is generally composed of a roller brush, a suction port, a dust cup, a motor and other components. When using a mite removal vacuum cleaner for cleaning, the dust mites beaten up by the roller brush are sucked into the dust cup through the suction port to achieve the purpose of cleaning.

[0003] The related art discloses a cleaning device, including a main body component, a handle, and a telescopic tube. The first end of the telescopic tube is fixedly connected to the main body component, and the second end is fixed in the handle. The telescopic tube has an extended state and a retracted state. When the user needs to clean the bed or a relatively large area, the telescopic tube is pulled open to put the telescopic tube in an extended state. At this time, the user can clean the bed or a relatively large area by standing beside the bed or standing in one position without bending over, and the cleaning is effortless. When the cleaning is completed, the telescopic tube is retracted to put the telescopic tube in a retracted state. The whole machine occupies a small volume and is easy to store.

[0004] In the above-mentioned related technologies, the telescopic tube can be fully extended or fully retracted, and there is no other length for users to choose. It cannot meet the various usage needs of users and the experience is poor. Utility Model Content

[0005] In view of this, the utility model provides a device with a telescopic tube to solve the problem that the telescopic tube of the cleaning equipment in the related art can only be fully extended or fully retracted.

[0006] The utility model provides a device with a telescopic tube, comprising:

[0007] main body;

[0008] handle;

[0009] A telescopic tube, a first end of which is fixedly connected to the main body and a second end of which is fixed in the handle, the telescopic tube comprising a plurality of tube bodies which are sleeved in sequence, each of which is provided with a locking hole, the telescopic tube having a fully extended state, a partially extended state and a fully retracted state, and when the telescopic tube is in the partially extended state or the fully retracted state, the locking holes on the tube bodies which are not extended are aligned;

[0010] The switch assembly comprises a locking pin, wherein the locking pin is movably arranged on the handle, and the locking pin has a locked state and an unlocked state, wherein in the unlocked state, the locking pin leaves the locking hole on at least one unextended tube body, and in the locked state, the locking pin is inserted into the locking hole on the unextended tube body;

[0011] The gear adjustment component is arranged on the handle and is used to limit the moving stroke of the locking pin. Under different gears in the unlocked state, the number of locking holes that the locking pin leaves is different.

[0012] Beneficial effect: The user can adjust to different gears through the gear adjustment component. When the locking pin is in the unlocked state, the number of locking holes that the locking pin leaves is different in different gears, so the number of tubes that can be pulled out is different, and the tube inserted by the locking pin cannot be pulled out, so that the telescopic tube remains in a partially extended state. Therefore, the device with the telescopic tube can have a variety of lengths of telescopic tubes to meet the different usage needs of users and improve the user experience.

[0013] In an optional implementation, the gear adjustment assembly includes:

[0014] The gear adjustment lever is rotatably arranged on the handle, and a plurality of limit parts are arranged on the outer periphery of the gear adjustment lever. The distance between each limit part and the axis of the gear adjustment lever is different. Under different gear positions, the locking pin abuts against different limit parts.

[0015] In an optional embodiment, a gear adjustment rod mounting hole is provided in the handle, and the gear adjustment rod is rotatably disposed in the gear adjustment rod mounting hole. An anti-drop buckle is provided at the first end of the gear adjustment rod, and after the gear adjustment rod passes through the gear adjustment rod mounting hole, the anti-drop buckle abuts against the outer side of the end of the gear adjustment rod mounting hole.

[0016] In an optional embodiment, the gear adjustment assembly further includes a gear knob, which is rotatably disposed on the handle and extends out of the handle, and the gear knob is connected to the gear adjustment rod.

[0017] In an optional embodiment, the handle is provided with a gear knob mounting hole, part of the gear knob is located in the gear knob mounting hole, the gear adjustment rod mounting hole and / or the gear knob mounting hole are provided with a lowest gear over-rotation stop surface and a highest gear over-rotation stop surface, when the gear adjustment rod is rotated to the lowest gear, the gear adjustment rod abuts against the lowest gear over-rotation stop surface, and when the gear adjustment rod is rotated to the highest gear, the gear adjustment rod abuts against the highest gear over-rotation stop surface.

[0018] In an optional implementation, the second end of the gear adjustment rod is plugged into the gear knob.

[0019] In an optional embodiment, the second end of the gear adjustment lever is provided with a rotation slot, and the gear knob is provided with a knob limiting rib, and the knob limiting rib is inserted into the rotation slot.

[0020] In an optional embodiment, the gear knob is provided with a rotating rib suitable for gripping.

[0021] In an optional embodiment, a plurality of locking grooves are further provided on the periphery of the gear adjustment lever, and the gear adjustment assembly further comprises:

[0022] A gear locking rod is movably arranged on the handle, and the gear locking rod has a limiting head, and the limiting head is embedded in different locking grooves in different gear positions;

[0023] The first elastic member is arranged between the gear locking rod and the handle, and the elastic force of the first elastic member is suitable for making the limit head embed into the locking groove.

[0024] In an optional embodiment, the handle is provided with a stepped hole, the stepped hole comprises a first hole segment and a second hole segment, the inner diameter of the first hole segment is smaller than the inner diameter of the second hole segment, and a stepped surface is formed between the first hole segment and the second hole segment;

[0025] The gear locking rod includes a rod body and a boss protruding from the rod body, the rod body passes through the first hole segment, the first elastic member surrounds the rod body and is located between the boss and the step surface, the outer diameter of the boss is larger than the inner diameter of the second hole segment, and the limit head is arranged at the end of the rod body.

[0026] In an optional embodiment, the switch assembly also includes an unlocking button, and a transmission structure is provided between the unlocking button and the locking pin. When the unlocking button is pressed, the transmission structure drives the locking pin to move to the unlocking state, and when the unlocking button is released, the locking pin moves to the locking state.

[0027] In an optional embodiment, a second elastic member is provided between the locking pin and the handle, and when the unlocking button is released, the elastic force of the second elastic member resets the locking pin to the locked state.

[0028] In an optional embodiment, the transmission structure includes a rocker rod, which is rotatably disposed in the handle, and the rocker rod includes a rotating part and a first connecting part and a second connecting part located on both sides of the rotating part, the lower end of the unlocking button is against the first connecting part, and the second connecting part is connected to the locking pin.

[0029] In an optional embodiment, two second connecting parts are symmetrically provided, and the locking pin is clamped between the two second connecting parts.

[0030] In an optional embodiment, the locking pin includes a rocker action surface, and the second connecting portion abuts against the rocker action surface.

[0031] In an optional embodiment, the first connecting portion has a first curved surface, and the lower end of the unlocking button abuts against the first curved surface;

[0032] And / or the second connecting portion has a second arc surface, and the second arc surface is against the rocker action surface.

[0033] In an optional embodiment, the distance between the first connecting portion and the axis of the rotating portion is smaller than the distance between the second connecting portion and the axis of the rotating portion.

[0034] In an optional embodiment, the locking pin includes a pin and a fixed portion arranged on the outside of the pin, one end of the fixed portion constitutes a spring limiting surface, and the other end constitutes the rocker arm action surface, and a portion of the second elastic member is sleeved outside the pin, and one end is against the spring limiting surface, and the other end is against the handle.

[0035] In an optional embodiment, the locking pin and the handle cooperate with each other via a limiting structure, and the limiting structure is used to enable the locking pin to move in a direction perpendicular to the axis of the tube body.

[0036] In an optional embodiment, the unlocking button includes a push rod, a limiting hole is provided in the handle, the push rod passes through the limiting hole, and the axis of the limiting hole is perpendicular to the axis of the tube body.

[0037] In an optional embodiment, the push rod is provided with a step portion, and when the step portion abuts against the outer peripheral end surface of the limiting hole, the limiting hole prevents the unlocking button from being further pressed and moved.

[0038] In an optional embodiment, the unlocking button is connected to a first clamping portion, and the main body is provided with a second clamping portion. When the telescopic tube is in a fully retracted state and the unlocking button is not pressed, the second clamping portion cooperates with the first clamping portion to prevent the handle from moving away from the main body. When the unlocking button is pressed, the second clamping portion separates from the first clamping portion.

[0039] In an optional embodiment, a connecting portion is provided on one side of the lower end of the unlocking button, the first clamping portion is provided above the connecting portion, the lower surface of the connecting portion is a downward pressure surface, and when the telescopic tube is in a fully extended state, the bumping ball embedded in the bumping ball hole of the outermost tube body is located below the downward pressure surface, and when the unlocking button is pressed, the downward pressure surface is suitable for compressing the bumping ball embedded in the bumping ball hole of the outermost tube body.

[0040] In an optional embodiment, the device having the telescopic tube is a cleaning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A cross-sectional view of a device with a telescopic tube according to an embodiment of the utility model when the telescopic tube is in a partially extended state;

[0043] Figure 2 for Figure 1 AA section view;

[0044] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0045] Figure 4 for Figure 1 Schematic diagram of the structure of the unlock button;

[0046] Figure 5 for Figure 4 A cross-sectional view of the unlock button shown;

[0047] Figure 6 for Figure 1 Schematic diagram of the structure of the middle swing rod;

[0048] Figure 7 for Figure 1 A schematic diagram of the structure of the middle locking pin;

[0049] Figure 8 for Figure 2 A schematic diagram of the structure of the mid-range adjustment lever at a viewing angle;

[0050] Fig. 9 for Figure 2 A schematic diagram of the structure of the mid-range adjustment lever at another viewing angle;

[0051] Fig.10 for Figure 2 Schematic diagram of the structure of the mid-range knob;

[0052] Fig.11 for Figure 2 A schematic diagram of the structure of the mid-gear locking lever;

[0053] Fig.12 for Figure 1 A schematic diagram of the structure of the middle handle at a viewing angle;

[0054] Fig.13 for Figure 1 A schematic diagram of the structure of the middle handle from another perspective;

[0055] Fig.14 is a cross-sectional view of the telescopic tube when the first tube body is extended;

[0056] Fig.15 A side view of a device with a telescopic tube according to an embodiment of the utility model when a user selects a first gear;

[0057] Fig.16 A cross-sectional view of a device with a telescopic tube according to an embodiment of the utility model when the telescopic tube is in a fully retracted state;

[0058] Fig.17 A cross-sectional view of a device with a telescopic tube in an embodiment of the utility model during the process of extending the first tube body;

[0059] Fig.18 A side view of a device with a telescopic tube according to an embodiment of the utility model when a user selects the second gear;

[0060] Fig.19 A cross-sectional view of a device with a telescopic tube in an embodiment of the utility model during the process of extending the second tube body;

[0061] Fig. 20 A cross-sectional view of a device with a telescopic tube after the first tube body and the second tube body are extended according to an embodiment of the utility model;

[0062] Fig.21 for Fig. 20 The enlarged view of point B in the middle;

[0063] Fig. 22A side view of a device with a telescopic tube according to an embodiment of the utility model when a user selects the third gear;

[0064] Fig.23 A cross-sectional view of a device with a telescopic tube in an embodiment of the utility model during the process of extending the third tube body;

[0065] Fig.24 for Fig.23 Enlarged view of point C in the middle;

[0066] Fig.25 It is a cross-sectional view of a device with a telescopic tube after the first tube body, the second tube body and the third tube body are extended in an embodiment of the utility model;

[0067] Fig.26 for Fig.25 The enlarged view of point D in the middle;

[0068] Fig. 27 A side view of a device with a telescopic tube according to an embodiment of the utility model when a user selects the fourth gear;

[0069] Fig.28 A cross-sectional view of a device with a telescopic tube in an embodiment of the utility model during the process of extending the fourth tube body;

[0070] Fig.29 It is a cross-sectional view of a device with a telescopic tube after the first tube body, the second tube body, the third tube body and the fourth tube body are extended in an embodiment of the utility model;

[0071] Fig.30 for Fig.29 Enlarged view of point E in the middle;

[0072] Fig.31 It is a cross-sectional view after the user presses the unlock button when the telescopic tube needs to be retracted;

[0073] Fig.32 for Fig.31 Enlarged view of point F in the middle.

[0074] Description of reference numerals:

[0075] 1. Main body; 101. Second engaging part; 2. Handle; 201. Gear adjustment lever mounting hole; 202. Gear knob mounting hole; 2021. Lowest gear over-rotation termination surface; 2022. Highest gear over-rotation termination surface; 203. Step hole; 2031. First hole section; 2032. Second hole section; 2033. Step surface; 204. Lock pin mounting hole; 205. Limiting hole; 206. Unlock button mounting hole; 3. Lock hole; 4. Lock Fixed pin; 401, rocker action surface; 402, pin; 403, fixed part; 4031, spring limit surface; 5, gear adjustment lever; 501, limit part; 502, anti-drop buckle; 503, rotation slot; 504, locking slot; 6, gear knob; 601, knob limit rib; 602, rotation rib; 7, gear locking lever; 701, limit head; 702, lever body; 703, boss; 8, first elastic member; 9, unlock button; 901, top rod; 902, step portion; 903, first engaging portion; 904, connecting portion; 9041, lower pressing surface; 10, second elastic member; 11, swing rod; 1101, rotating portion; 1102, first connecting portion; 1103, second connecting portion; 12, first tube body; 1201, first spring sheet; 12011, first bumping bead; 13, second tube body; 1301, first sleeve; 1302, first bumping bead hole; 1303, first Second spring piece; 13031, second bead; 14, third tube; 1401, second sleeve; 1402, second bead hole; 1403, third spring piece; 14031, third bead; 15, fourth tube; 1501, third sleeve; 1502, third bead hole; 1503, fourth spring piece; 15031, fourth bead; 16, fifth tube; 1601, fourth sleeve; 1602, fourth bead hole; 17, third elastic member. DETAILED DESCRIPTION

[0076] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0077] Combine the following Figures 1 to 32 , describing an embodiment of the utility model.

[0078] According to an embodiment of the utility model, a device with a telescopic tube is provided, comprising a main body 1, a handle 2, the telescopic tube, a switch assembly and a gear adjustment assembly.

[0079] Among them, the first end of the telescopic tube is fixedly connected to the main body 1, and the second end is fixed in the handle 2. The telescopic tube includes a plurality of tube bodies which are sequentially sleeved, and each tube body is provided with a locking hole 3. The telescopic tube has a fully extended state, a partially extended state and a fully retracted state. When the telescopic tube is in the partially extended state or the fully retracted state, the locking holes 3 on the unextended tube bodies are aligned; the switch assembly includes a locking pin 4, which is movably arranged on the handle 2. The locking pin 4 has a locked state and an unlocked state. In the unlocked state, the locking pin 4 leaves the locking hole 3 on at least one unextended tube body, and in the locked state, the locking pin 4 is inserted into the locking hole 3 on the unextended tube body; the gear adjustment assembly is arranged on the handle 2, and is used to limit the moving stroke of the locking pin 4. Under different gears in the unlocked state, the number of locking holes 3 left by the locking pin 4 is different.

[0080] In this embodiment, the user can adjust to different gears through the gear adjustment component. When the locking pin 4 is in the unlocked state, the number of locking holes 3 that the locking pin 4 leaves is different in different gears, so the number of tubes that can be pulled out is different, and the tube inserted by the locking pin 4 cannot be pulled out, so that the telescopic tube remains in a partially extended state. Therefore, the device with the telescopic tube can have a variety of lengths of the telescopic tube to meet the different usage needs of users and improve the user experience.

[0081] Specifically, for example, in the first gear, the locking pin 4 leaves zero locking holes 3, and only one section of the tube body can be pulled out; in the second gear, the locking pin 4 leaves one locking hole 3, and two sections of the tube body can be pulled out; in the third gear, the locking pin 4 leaves two locking holes 3, and three sections of the tube body can be pulled out; in the fourth gear, the locking pin 4 leaves three locking holes 3, and four sections of the tube body can be pulled out, and so on.

[0082] In one embodiment, Figure 8 and Fig. 9 As shown, the gear adjustment assembly includes a gear adjustment rod 5, which is rotatably arranged on the handle 2. A plurality of limiting portions 501 are arranged on the periphery of the gear adjustment rod 5. The distances between each limiting portion 501 and the axis of the gear adjustment rod 5 are different. Under different gear positions, the locking pin 4 abuts against different limiting portions 501.

[0083] In this embodiment, the user can adjust the gear position by rotating the gear adjustment lever 5. Since the distances between the various limiting parts 501 and the axis of the gear adjustment lever 5 are different, the locking pin 4 abuts against different limiting parts 501 at different gear positions. Therefore, the locking pin 4 can move at different strokes, resulting in different numbers of locking holes 3 that the locking pin 4 can leave and different numbers of tubes that can be pulled out. The user can adjust to the desired gear position by rotating the gear adjustment lever 5, meeting the different usage needs of the user and improving the user experience.

[0084] In an embodiment not shown in the figure, the gear adjustment component can be arranged in the handle 2 in a liftable manner. Under different gears, the gear adjustment component rises by different distances, and the top end of the locking pin 4 abuts against the gear adjustment component.

[0085] In one embodiment, Fig.12 and Fig.13 As shown, a gear adjustment rod mounting hole 201 is provided in the handle 2, and the gear adjustment rod 5 is rotatably arranged in the gear adjustment rod mounting hole 201. The first end of the gear adjustment rod 5 is provided with an anti-drop buckle 502. After the gear adjustment rod 5 passes through the gear adjustment rod mounting hole 201, the anti-drop buckle 502 abuts against the outer side of the end of the gear adjustment rod mounting hole 201.

[0086] In this embodiment, the gear adjustment rod mounting hole 201 can limit the circumference of the gear adjustment rod 5. During installation, the anti-dropout buckle 502 is passed through the gear adjustment rod mounting hole 201. After passing through the gear adjustment rod mounting hole 201, the anti-dropout buckle 502 abuts against the outer side of the end of the gear adjustment rod mounting hole 201, thereby preventing the gear adjustment rod 5 from falling out of the gear adjustment rod mounting hole 201 during rotation.

[0087] In one embodiment, Figure 3 As shown, the gear adjustment assembly also includes a gear knob 6 , which is rotatably disposed on the handle 2 and extends out of the handle 2 , and the gear knob 6 is connected to the gear adjustment rod 5 .

[0088] In this embodiment, the gear knob 6 extends out of the handle 2 , so it is convenient for the user to operate. The gear knob 6 is connected to the gear adjustment rod 5 , so the gear adjustment rod 5 can be driven to rotate by rotating the gear knob 6 .

[0089] Specific as Fig.12 and Fig.13 As shown, the handle 2 is provided with a gear knob mounting hole 202 , a portion of the gear knob 6 is located in the gear knob mounting hole 202 , and the gear knob mounting hole 202 and the gear adjustment rod mounting hole 201 cooperate to support the gear adjustment rod 5 .

[0090] In one embodiment, Fig.13 As shown, the gear knob mounting hole 202 and / or the gear adjustment rod mounting hole 201 are provided with a lowest gear over-rotation stop surface 2021 and a highest gear over-rotation stop surface 2022. When the gear adjustment rod 5 is rotated to the lowest gear, the gear adjustment rod 5 abuts against the lowest gear over-rotation stop surface 2021. When the gear adjustment rod 5 is rotated to the highest gear, the gear adjustment rod 5 abuts against the highest gear over-rotation stop surface 2022.

[0091] In this embodiment, when the gear adjustment lever 5 rotates to the lowest gear, the gear adjustment lever 5 abuts against the lowest gear over-rotation stop surface 2021, and when the gear adjustment lever 5 rotates to the highest gear, the gear adjustment lever 5 abuts against the highest gear over-rotation stop surface 2022, which can prevent the gear adjustment lever 5 from excessively rotating and deviating from the correct gear.

[0092] In one embodiment, the second end of the gear adjustment lever 5 is plugged into the gear knob 6 .

[0093] In this embodiment, the second end of the gear adjustment rod 5 is plugged into the gear knob 6 , and the assembly method of the gear adjustment rod 5 and the gear knob 6 is simple and has high assembly efficiency.

[0094] In other alternative embodiments, the second end of the gear adjustment rod 5 can be connected to the gear knob 6 through threads.

[0095] In one embodiment, Figure 8 , Fig. 9 and Fig.10 As shown, the second end of the gear adjustment rod 5 is provided with a rotation slot 503 , and the gear knob 6 is provided with a knob limiting rib 601 , and the knob limiting rib 601 is inserted into the rotation slot 503 .

[0096] In this embodiment, the knob limiting rib 601 on the gear knob 6 is inserted into the rotation slot 503 on the gear adjustment rod 5. The assembly method of the gear adjustment rod 5 and the gear knob 6 is simple and the assembly efficiency is high. The gear adjustment rod 5 can be driven to rotate by rotating the gear knob 6.

[0097] In one embodiment, further reference is made to Fig.10 The gear knob 6 is provided with a rotating rib 602 suitable for holding.

[0098] In this embodiment, the setting of the rotating rib 602 is convenient for the user to hold and rotate the gear knob 6 .

[0099] In one embodiment, Figure 3 , Figure 8 and Fig. 9 The outer periphery of the gear adjustment rod 5 is also provided with a plurality of locking grooves 504, and the gear adjustment assembly further comprises a gear locking rod 7 and a first elastic member 8. The gear locking rod 7 is movably arranged on the handle 2, and the gear locking rod 7 has a limiting head 701, and the limiting head 701 is embedded in different locking grooves 504 under different gears; the first elastic member 8 is arranged between the gear locking rod 7 and the handle 2, and the elastic force of the first elastic member 8 is suitable for enabling the limiting head 701 to be embedded in the locking groove 504.

[0100] In this embodiment, since the limit head 701 of the gear locking rod 7 is embedded in the locking groove 504, the gear adjustment rod 5 can be kept at a certain gear position. When the user needs to adjust the gear position, the process of rotating the gear locking rod 7 will encounter certain resistance, and it is necessary to overcome the elastic force of the first elastic member 8 to make the limit head 701 leave the locking groove 504 before it can be rotated to the next gear position. After rotating to the next gear position, the elastic force of the first elastic member 8 makes the limit head 701 of the gear locking rod 7 embedded in the locking groove 504 again. Therefore, the setting of the gear locking rod 7 and the first elastic member 8 enables the user to have a certain feel when turning the gear knob 6, and can feel that it is rotated in place, and can ensure that the gear adjustment rod 5 remains at a certain gear position.

[0101] In one embodiment, Figure 3 As shown, the handle 2 is provided with a step hole 203, the step hole 203 includes a first hole section 2031 and a second hole section 2032, the inner diameter of the first hole section 2031 is smaller than the inner diameter of the second hole section 2032, and a step surface 2033 is formed between the first hole section 2031 and the second hole section 2032; the gear locking rod 7 includes a rod body 702 and a boss 703 protruding from the rod body 702, the rod body 702 passes through the first hole section 2031, the first elastic member 8 surrounds the outside of the rod body 702 and is located between the boss 703 and the step surface 2033, the outer diameter of the boss 703 is larger than the inner diameter of the second hole section 2032, and the limit head 701 is arranged at the end of the rod body 702.

[0102] In this embodiment, since the outer diameter of the boss 703 is larger than the inner diameter of the second hole segment 2032, the boss 703 can only move between the upper side of the step hole 203 and the gear adjustment rod 5, thereby limiting the moving stroke of the gear locking rod 7. By making the step hole 203 include the first hole segment 2031 and the second hole segment 2032, the inner diameter of the first hole segment 2031 is smaller than the inner diameter of the second hole segment 2032, and a step surface 2033 is formed between the first hole segment 2031 and the second hole segment 2032, it is convenient to install the gear locking rod 7 and install and fix the first elastic member 8.

[0103] In one embodiment, the switch assembly also includes an unlocking button 9, and a transmission structure is provided between the unlocking button 9 and the locking pin 4. When the unlocking button 9 is pressed, the transmission structure drives the locking pin 4 to move to an unlocking state. When the unlocking button 9 is released, the locking pin 4 moves to a locking state.

[0104] In this embodiment, when the tube body needs to be extended, the gear adjustment component is first used to adjust the gear to the user's desired gear, and then the unlocking button 9 is pressed. The transmission structure causes the locking pin 4 to move in the direction away from the locking hole 3, that is, to move radially outward along the tube body. The gear adjustment component limits the movement stroke of the locking pin 4, so that the locking pin 4 leaves the locking holes 3 on the tube bodies that have not been extended corresponding to the gear position, thereby releasing the lock on the corresponding number of tube bodies that have not been extended. At this time, the corresponding number of tube bodies that have not been extended can be extended, and the setting of the unlocking button 9 is convenient for user operation.

[0105] Specifically, there is one section of the tube body that is not locked by the locking pin 4. When the user selects the first gear, the locking pin 4 leaves zero locking holes 3, and at this time only one section of the tube body can be pulled out; when the user selects the second gear, the locking pin 4 leaves one locking hole 3, and at this time two sections of the tube body can be pulled out; when the user selects the third gear, the locking pin 4 leaves two locking holes 3, and at this time three sections of the tube body can be pulled out; when the user selects the fourth gear, the locking pin 4 leaves three locking holes 3, and four sections of the tube body can be pulled out, and so on.

[0106] Specifically in one embodiment, Fig.12 and Fig.13 As shown, the handle 2 is provided with an unlock button 9 mounting hole suitable for the unlock button 9 to extend. When the unlock button 9 is pressed, the unlock button 9 moves along the unlock button 9 mounting hole, and a part of the unlock button 9 extends out of the handle 2, thereby facilitating the operation of the unlock button 9.

[0107] Specifically in one embodiment, Figure 1 As shown, a third elastic member 17 is provided between the unlocking button 9 and the handle 2. After the unlocking button 9 is released, the elastic force of the third elastic member 17 resets the unlocking button 9.

[0108] In one embodiment, Figure 2 As shown, a second elastic member 10 is provided between the locking pin 4 and the handle 2. When the unlocking button 9 is released, the elastic force of the second elastic member 10 resets the locking pin 4 to the locked state.

[0109] In this embodiment, when the transmission structure drives the locking pin 4 to move until the locking pin 4 leaves the locking hole 3 on the unextended tube body, the second elastic member 10 generates an elastic force. When the unlocking button 9 is released, the locking pin 4 loses the force of the transmission structure. Therefore, the elastic force of the second elastic member 10 can reset the locking pin 4 to the locked state, and the locking pin 4 is inserted into the locking hole 3 on the unextended tube body again.

[0110] In an embodiment not shown in the figure, it is conceivable not to set the second elastic member 10. In this case, the transmission structure may include a gear assembly, and the unlocking button 9 may be connected to the first rack. When the unlocking button 9 moves, it drives the first rack to move together. The first rack is meshed with one side of the gear assembly. The locking pin 4 may be formed with a second rack or connected to the second rack as a whole. The second rack is meshed with the other side of the gear assembly. When the unlocking button 9 is pressed, the first rack is driven to move downward and the gear assembly is driven to rotate. When the gear assembly rotates, it drives the second rack and the locking pin 4 to move upward and leave the locking hole 3 on the unextended tube body. When the extended length of the telescopic tube meets the user's usage requirements, the unlocking button 9 is released, and the unlocking button 9 moves upward, driving the gear assembly to rotate. When the gear assembly rotates, it drives the second rack and the locking pin 4 to move downward and insert into the locking hole 3 on the unextended tube body.

[0111] In one embodiment, Figure 6 As shown, the transmission structure includes a rocker rod 11, which is rotatably arranged in the handle 2. The rocker rod 11 includes a rotating part 1101 and a first connecting part 1102 and a second connecting part 1103 located on both sides of the rotating part 1101. The lower end of the unlocking button 9 is against the first connecting part 1102, and the second connecting part 1103 is connected to the locking pin 4.

[0112] In this embodiment, the transmission structure includes a rocker rod 11, which includes a rotating part 1101 and a first connecting part 1102 and a second connecting part 1103 located on both sides of the rotating part 1101. The lower end of the unlocking button 9 is against the first connecting part 1102, and the second connecting part 1103 is connected to the locking pin 4. The transmission structure has a simple structure, low cost, and is easy to install in the handle 2. Specifically, when the tube body needs to be extended, first adjust the gear position to the user's required gear position through the gear adjustment component, and then press the unlocking button 9. At this time, the lower end of the unlocking button 9 is against the first connecting part 1102, causing the first connecting part 1102 to rotate downward, thereby driving the rocker bar 11 to rotate, thereby causing the second connecting part 1103 to rotate upward, driving the locking pin 4 to move upward and leave the locking hole 3 on the unextended tube body. The gear adjustment component limits the movement stroke of the locking pin 4, so that the locking pin 4 leaves the locking holes 3 on the unextended tube body corresponding to the gear position, and releases the lock on the corresponding number of unextended tube bodies. At this time, the corresponding number of unextended tube bodies can be extended, and the second elastic member 10 generates an elastic force. The user can release the unlocking button 9, and the first connecting part 1102 loses its force. After the corresponding number of tube bodies are extended, the elastic force of the first elastic member 8 can cause the locking pin 4 to automatically insert into the locking hole 3 on the unextended tube body.

[0113] Specifically in one embodiment, Figure 6As shown, the rotating part 1101 is a rotating shaft, and a rotating shaft mounting hole is provided in the handle 2, and the rotating shaft is rotatably mounted in the rotating shaft mounting hole.

[0114] In one embodiment, two second connecting parts 1103 are symmetrically provided, and the locking pin 4 is sandwiched between the two second connecting parts 1103 .

[0115] In this embodiment, the locking pin 4 is sandwiched between the two second connecting parts 1103 , and the connection method between the locking pin 4 and the second connecting parts 1103 is simple and convenient for assembly.

[0116] In one embodiment, the locking pin 4 includes a rocker action surface 401 , and the second connecting portion 1103 abuts against the rocker action surface 401 .

[0117] In this embodiment, the locking pin 4 is clamped between the two second connecting parts 1103, and the second connecting part 1103 is abutted against the rocker action surface 401 of the locking pin 4. When the unlocking button 9 is pressed, the lower end of the unlocking button 9 is abutted against the first connecting part 1102, causing the first connecting part 1102 to rotate downward, thereby driving the rocker 11 to rotate, thereby causing the second connecting part 1103 to rotate upward, driving the locking pin 4 to move upward and leave the locking hole 3 on the unextended tube body.

[0118] In one embodiment, the first connection portion 1102 has a first curved surface, and the lower end of the unlocking button 9 abuts against the first curved surface; and / or the second connection portion 1103 has a second curved surface, and the second curved surface abuts against the rocker action surface 401.

[0119] In this embodiment, since the rocker arm 11 is rotatably disposed in the handle 2, the motion trajectories of its two ends are arc-shaped. The first connecting portion 1102 has a first arc surface, and the lower end of the unlocking button 9 is against the first arc surface. The second connecting portion 1103 has a second arc surface, and the second arc surface is against the rocker arm action surface 401. This can ensure that when the unlocking button 9 is pressed, the unlocking button 9 can maintain contact with the first connecting portion 1102, and the second connecting portion 1103 maintains contact with the locking pin 4.

[0120] In one embodiment, the distance between the first connection portion 1102 and the axis of the rotating portion 1101 is smaller than the distance between the second connection portion 1103 and the axis of the rotating portion 1101 .

[0121] In this embodiment, since the distance between the first connecting part 1102 and the axis of the rotating part 1101 is smaller than the distance between the second connecting part 1103 and the axis of the rotating part 1101, it can be ensured that the moving stroke of the second connecting part 1103 is greater than the moving stroke of the first connecting part 1102, thereby ensuring that the locking pin 4 can be inserted into the locking hole 3 of each tube body.

[0122] In one embodiment, Figure 7 As shown, the locking pin 4 includes a pin 402 and a fixing portion 403 arranged on the outside of the pin 402, one end of the fixing portion 403 constitutes a spring limiting surface 4031, and the other end constitutes a rocker action surface 401, and a portion of the second elastic member 10 is sleeved outside the pin 402, and one end is against the spring limiting surface 4031, and the other end is against the handle 2.

[0123] In this embodiment, one end of the fixing portion 403 constitutes a spring limiting surface 4031 , a portion of the second elastic member 10 is sleeved outside the pin 402 , and one end abuts against the spring limiting surface 4031 , so as to facilitate installation of the second elastic member 10 .

[0124] In this embodiment, a spring mounting surface is provided inside the handle 2, and the other end of the second elastic member 10 abuts against the spring mounting surface.

[0125] In one embodiment, the locking pin 4 and the handle 2 are matched via a limiting structure, and the limiting structure is used to enable the locking pin 4 to move in a direction perpendicular to the axis of the tube body.

[0126] In this embodiment, the setting of the limiting structure can ensure that the locking pin 4 moves in a direction perpendicular to the axis of the tube body, thereby ensuring that the locking pin 4 can be smoothly inserted into the locking hole 3 of the tube body that has not been extended.

[0127] Specifically in one embodiment, Fig.12 As shown, the limiting structure includes two locking pin mounting holes 204 arranged in the handle 2 , and the locking pin 4 is installed in the locking pin mounting holes 204 .

[0128] In one embodiment, Figure 4 , Figure 5 and Fig.12 The unlocking button 9 includes a push rod 901, a limiting hole 205 is provided in the handle 2, and the push rod 901 passes through the limiting hole 205, and the axis of the limiting hole 205 is perpendicular to the axis of the tube body.

[0129] In this embodiment, the limiting hole 205 cooperates with the push rod 901 to make the central axes of the push rod 901 and the unlocking button 9 collinear.

[0130] In one embodiment, the push rod 901 is provided with a step portion 902 , and when the step portion 902 abuts against the outer peripheral end surface of the limiting hole 205 , the limiting hole 205 prevents the unlocking button 9 from being further pressed and moved.

[0131] In this embodiment, when the step portion 902 abuts against the outer peripheral end surface of the limiting hole 205 , the limiting hole 205 prevents the unlocking button 9 from being further pressed and moved, thereby effectively limiting the travel of the unlocking button 9 .

[0132] In one embodiment, Figure 1 and Figure 5 The unlock button 9 is connected to a first engaging portion 903, and the main body 1 is provided with a second engaging portion 101. When the telescopic tube is in a fully retracted state and the unlock button 9 is not pressed, the second engaging portion 101 cooperates with the first engaging portion 903 to prevent the handle 2 from moving away from the main body 1. When the unlock button 9 is pressed, the second engaging portion 101 separates from the first engaging portion 903.

[0133] In this embodiment, the unlocking button 9 is connected to the first engaging portion 903. When the telescopic tube is in a fully retracted state, the first engaging portion 903 cooperates with the second engaging portion 101 to prevent the handle 2 from moving away from the main body 1, thereby preventing the telescopic tube from extending. This makes the entire device smaller in size and easier to store. When the telescopic tube needs to be extended, after adjusting the gear position, the unlocking button 9 is pressed, and the second engaging portion 101 is separated from the first engaging portion 903. At the same time, the locking pin 4 leaves the locking holes 3 on the number of unextended tube bodies corresponding to the gear position, thereby releasing the lock on the corresponding number of unextended tube bodies. At this time, the corresponding number of unextended tube bodies can be extended. Therefore, the unlocking button 9 can realize the unlocking between the handle 2 and the main body 1, and can also realize the unlocking of each tube body by the locking pin 4.

[0134] Specifically in one embodiment, Figure 5 As shown, the top of the first engaging portion 903 includes a barbed surface and a horizontal surface, and the barbed surface, the horizontal surface and the unlocking button 9 form a groove. When the telescopic tube is in a fully retracted state and the unlocking button 9 is not pressed, the barbed surface abuts against the second engaging portion 101. When the unlocking button 9 is pressed, the first engaging portion 903 moves downward with the unlocking button 9, so that the barbed surface is separated from the second engaging portion 101.

[0135] In one embodiment, Fig.31 and Fig.32 As shown, a connecting portion 904 is provided on one side of the lower end of the unlocking button 9, and a first engaging portion 903 is provided above the connecting portion 904. The lower surface of the connecting portion 904 is a downward pressing surface 9041. When the telescopic tube is in a fully extended state, the bumping ball embedded in the bumping ball hole of the outermost tube body is located below the downward pressing surface 9041. When the unlocking button 9 is pressed, the downward pressing surface 9041 is suitable for compressing the bumping ball embedded in the bumping ball hole of the outermost tube body.

[0136] In this embodiment, the setting of the lower pressure surface 9041 can make the bumping ball embedded in the bumping ball hole of the outermost tube body retract, thereby facilitating the retraction of the telescopic tube.

[0137] Specifically in one embodiment, Fig.14 As shown, from inside to outside, the telescopic tube has five tube bodies, namely a first tube body 12 , a second tube body 13 , a third tube body 14 , a fourth tube body 15 and a fifth tube body 16 .

[0138] The first end of the first tube body 12 is connected with a connecting structure, and the connecting structure is embedded in the main body 1. The outer side of the end of the first tube body 12 is provided with a first inner sleeve. The end of the first tube body 12 is provided with a first elastic piece 1201, and the first elastic piece 1201 has a first bump bead 12011.

[0139] A first sleeve 1301 is provided inside the head end of the second tube body 13 , a first bead hole 1302 is provided at the head end of the second tube body 13 , a second inner sleeve is provided outside the tail end of the second tube body 13 , a second spring piece 1303 is provided inside the tail end of the second tube body 13 , and the spring piece has a second bead 13031 .

[0140] A second sleeve 1401 is provided on the inner side of the head end of the third tube body 14 , a second bead hole 1402 is provided on the head end of the third tube body 14 , a third inner sleeve is provided on the outer side of the rear end of the third tube body 14 , a third elastic piece 1403 is provided on the inner side of the rear end of the third tube body 14 , and the third elastic piece 1403 has a third bead 14031 .

[0141] A third sleeve 1501 is provided on the inner side of the head end of the fourth tube body 15, a third bead hole 1502 is provided on the head end of the fourth tube body 15, a fourth inner sleeve is provided on the outer side of the rear end of the fourth tube body 15, a fourth spring piece 1503 is provided on the inner side of the rear end of the fourth tube body 15, and the fourth spring piece 1503 has a fourth bead 15031.

[0142] A fourth sleeve 1601 is disposed inside the head end of the fifth tube body 16 , a fourth bead-touching hole 1602 is disposed at the head end of the fifth tube body 16 , and the tail end of the reading tube body is disposed in the handle 2 .

[0143] The second tube body 13, the third tube body 14, the fourth tube body 15 and the fifth tube body 16 are all provided with locking holes 3, and the locking holes 3 are of the same size. When the telescopic tube is fully retracted, the locking holes 3 are coaxially arranged, and the locking holes 3 are smaller than the first bead hole 1302, the second bead hole 1402, the third bead hole 1502 and the fourth bead hole 1602, which can prevent the bead from entering the locking hole 3.

[0144] like Fig.16 As shown, when the telescopic tube is in the fully retracted state, the first engaging portion 903 on the unlocking button 9 is engaged with the second engaging portion 101 of the main body 1, and the handle 2 cannot move.

[0145] like Fig.15 As shown, when the user selects a gear and presses the unlock button 9, the first engaging portion 903 is separated from the second engaging portion 101, as shown in FIG. Fig.17 As shown, the handle 2 can be pulled out, and the locking pin 4 is still inserted in each locking hole 3. After the first engaging portion 903 is separated from the second engaging portion 101, the unlocking button 9 is released, and the handle 2 is pulled away from the main body 1 until the first sleeve 1301 is against the first inner sleeve, as shown in FIG. Fig.14As shown, at this time, the first bead 12011 is embedded in the first bead hole 1302 on the second tube body 13, connecting the first tube body 12 and the second tube body 13. At this time, only the first tube body 12 is pulled out.

[0146] like Fig.18 As shown in FIG. 1 , when the user selects the second gear and presses the unlocking button 9, the locking pin 4 can only leave the locking hole 3 on the second tube 13 due to the obstruction of the gear adjustment lever 5. Fig.19 As shown, the first tube body 12 and the second tube body 13 can be pulled out until the second sleeve 1401 abuts against the second inner sleeve, as shown in FIG. Fig. 20 and Fig.21 As shown, the second bead 13031 is embedded in the second bead hole 1402 on the third tube body 14, connecting the second tube body 13 and the third tube body 14 together. Since the locking pin 4 is still inserted in the locking hole 3 of the remaining tube bodies, the remaining tube bodies cannot be pulled out. At this time, the first tube body 12 and the second tube body 13 are in a state of being pulled out.

[0147] like Fig. 22 As shown, when the user selects the third gear and presses the unlock button 9, the gear adjustment lever 5 blocks the unlocking. Fig.23 and Fig.24 , the locking pin 4 leaves the locking hole 3 on the second tube body 13 and the third tube body 14, and the first tube body 12, the second tube body 13 and the third tube body 14 can be pulled out until the third sleeve 1501 abuts against the third inner sleeve, as shown in FIG. Fig.25 and Fig.26 As shown, the third bead 14031 is embedded in the third bead hole 1502 on the fourth tube body 15, connecting the third tube body 14 and the fourth tube body 15 together. Since the locking pin 4 is still inserted in the locking hole 3 of the remaining tube bodies, the remaining tube bodies cannot be pulled out. At this time, the first tube body 12, the second tube body 13 and the third tube body 14 are in a state of being pulled out.

[0148] like Fig. 27 As shown in FIG. 1 , when the user selects the fourth gear and presses the unlocking button 9, the locking pin 4 leaves the locking holes 3 on the second tube body 13, the third tube body 14 and the fourth tube body 15. Fig.28 As shown, the second tube body 13, the third tube body 14 and the fourth tube body 15 can be pulled out until the fourth sleeve 1601 abuts against the fourth inner sleeve, as shown in FIG. Fig.29 and Fig.30 As shown, the fourth bead 15031 is embedded in the fourth bead hole 1602 on the fifth tube body 16, connecting the fourth tube body 15 and the fifth tube body 16. At this time, the telescopic tube is in a fully extended state, the locking pin 4 is still inserted in the fifth tube body 16, and the fourth bead 15031 is located below the lower pressing surface 9041.

[0149] When it is necessary to retract, press the unlock button 9 to retract the locking pin 4. Fig.31 and Fig.32 , causing the fourth bead 15031 to retract, at this time the fourth tube body 15 can be retracted, until the head end of the fifth tube body 16 hits the third bead 14031, causing the third bead 14031 to retract, at this time the third tube body 14 can be retracted, when the head end of the fourth tube body 15 hits the second bead 13031, causing the second bead 13031 to retract, at this time the second tube body 13 can be retracted, when the head end of the third tube body 14 hits the first bead 12011, causing the first bead 12011 to retract, at this time the first tube body 12 can be retracted.

[0150] In one embodiment, the device having the telescoping tube is a cleaning device.

[0151] The cleaning device may be a mite remover or a vacuum cleaner.

[0152] The main body 1 generally includes a roller brush, a dust suction port, and a fan. The operation of the fan generates suction, and the dust mites beaten up by the roller brush are sucked into the dust cup assembly.

[0153] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A device having a telescopic tube, characterized in that: include: Subject (1); Handle (2); A telescopic tube, the first end of which is fixedly connected to the main body (1), and the second end of which is fixed in the handle (2), the telescopic tube comprising a plurality of tube bodies which are sleeved in sequence, each of which is provided with a locking hole (3), the telescopic tube having a fully extended state, a partially extended state and a fully retracted state, and when the telescopic tube is in the partially extended state or the fully retracted state, the locking holes (3) on the tube bodies which are not extended are aligned; The switch assembly comprises a locking pin (4), the locking pin (4) being movably arranged on the handle (2), the locking pin (4) having a locked state and an unlocked state, in which the locking pin (4) leaves a locking hole (3) on at least one unextended tube body in the unlocked state, and in which the locking pin (4) is inserted into a locking hole (3) on the unextended tube body in the locked state; A gear adjustment component is provided on the handle (2) and is used to limit the movement stroke of the locking pin (4); in different gears in the unlocked state, the number of locking holes (3) that the locking pin (4) leaves is different.

2. The device with telescopic tube according to claim 1, characterized in that The gear adjustment component comprises: A gear adjustment lever (5) is rotatably arranged on the handle (2); a plurality of limiting portions (501) are arranged on the outer periphery of the gear adjustment lever (5); the distances between each limiting portion (501) and the axis of the gear adjustment lever (5) are different; and in different gear positions, the locking pin (4) abuts against different limiting portions (501).

3. The device with telescopic tube according to claim 2, characterized in that A gear adjustment rod mounting hole (201) is provided in the handle (2), the gear adjustment rod (5) is rotatably arranged in the gear adjustment rod mounting hole (201), and an anti-drop buckle (502) is provided at the first end of the gear adjustment rod (5), and after the gear adjustment rod (5) passes through the gear adjustment rod mounting hole (201), the anti-drop buckle (502) abuts against the outer side of the end of the gear adjustment rod mounting hole (201).

4. The device with telescopic tube according to claim 3, characterized in that The gear adjustment assembly further comprises a gear knob (6), which is rotatably arranged on the handle (2) and extends out of the handle (2), and the gear knob (6) is connected to the gear adjustment rod (5).

5. The device with telescopic tube according to claim 4, characterized in that The handle (2) is provided with a gear knob mounting hole (202), a portion of the gear knob (6) is located in the gear knob mounting hole (202), the gear adjustment rod mounting hole (201) and / or the gear knob mounting hole (202) are provided with a lowest gear over-rotation termination surface (2021) and a highest gear over-rotation termination surface (2022), when the gear adjustment rod (5) is rotated to the lowest gear, the gear adjustment rod (5) abuts against the lowest gear over-rotation termination surface (2021), and when the gear adjustment rod (5) is rotated to the highest gear, the gear adjustment rod (5) abuts against the highest gear over-rotation termination surface (2022).

6. The device with telescopic tube according to claim 4, characterized in that The second end of the gear adjustment rod (5) is plugged into the gear knob (6).

7. The device with telescopic tube according to claim 6, characterized in that The second end of the gear adjustment lever (5) is provided with a rotation slot (503), and the gear knob (6) is provided with a knob limiting rib (601), and the knob limiting rib (601) is inserted into the rotation slot (503).

8. The device with telescopic tube according to claim 6, characterized in that The gear knob (6) is provided with a rotating rib (602) suitable for gripping.

9. The device with telescopic tubes according to any one of claims 2 to 8, characterized in that The outer circumference of the gear adjustment rod (5) is also provided with a plurality of locking grooves (504), and the gear adjustment assembly further comprises: A gear locking rod (7) is movably arranged on the handle (2), the gear locking rod (7) having a limiting head (701), and the limiting head (701) is embedded in different locking grooves (504) in different gear positions; A first elastic member (8) is provided between the gear locking rod (7) and the handle (2), and the elastic force of the first elastic member (8) is suitable for enabling the limiting head (701) to be embedded in the locking groove (504).

10. The device with telescopic tube according to claim 9, characterized in that The handle (2) is provided with a stepped hole (203), the stepped hole (203) comprising a first hole section (2031) and a second hole section (2032), the inner diameter of the first hole section (2031) being smaller than the inner diameter of the second hole section (2032), and a stepped surface (2033) being formed between the first hole section (2031) and the second hole section (2032); The gear locking rod (7) comprises a rod body (702) and a boss (703) protruding from the rod body (702); the rod body (702) passes through the first hole section (2031); the first elastic member (8) surrounds the outside of the rod body (702) and is located between the boss (703) and the step surface (2033); the outer diameter of the boss (703) is greater than the inner diameter of the second hole section (2032); and the limit head (701) is arranged at the end of the rod body (702).

11. The device with telescopic tubes according to any one of claims 1 to 8, characterized in that The switch assembly further comprises an unlocking button (9), wherein a transmission structure is provided between the unlocking button (9) and the locking pin (4); when the unlocking button (9) is pressed, the transmission structure drives the locking pin (4) to move to the unlocking state; and when the unlocking button (9) is released, the locking pin (4) moves to the locking state.

12. The device with telescopic tube according to claim 11, characterized in that A second elastic member (10) is provided between the locking pin (4) and the handle (2); when the unlocking button (9) is released, the elastic force of the second elastic member (10) causes the locking pin (4) to return to the locked state.

13. The device with telescopic tube according to claim 12, characterized in that The transmission structure comprises a rocker arm (11), the rocker arm (11) being rotatably arranged in the handle (2), the rocker arm (11) comprising a rotating portion (1101) and a first connecting portion (1102) and a second connecting portion (1103) located on both sides of the rotating portion (1101), the lower end of the unlocking button (9) being in contact with the first connecting portion (1102), and the second connecting portion (1103) being connected to the locking pin (4).

14. The device with telescopic tube according to claim 13, characterized in that Two second connecting parts (1103) are symmetrically provided, and the locking pin (4) is sandwiched between the two second connecting parts (1103).

15. The device with telescopic tube according to claim 13, characterized in that The locking pin (4) comprises a rocker action surface (401), and the second connecting portion (1103) abuts against the rocker action surface (401).

16. The device with telescopic tube according to claim 15, characterized in that The first connecting portion (1102) has a first curved surface, and the lower end of the unlocking button (9) abuts against the first curved surface; And / or the second connecting portion (1103) has a second arc surface, and the second arc surface abuts against the rocker action surface (401).

17. The device with telescopic tube according to claim 13, characterized in that The distance between the first connecting portion (1102) and the axis of the rotating portion (1101) is smaller than the distance between the second connecting portion (1103) and the axis of the rotating portion (1101).

18. The device with telescopic tubes according to claim 15 or 16, characterized in that The locking pin (4) comprises a pin (402) and a fixing portion (403) arranged outside the pin (402); one end of the fixing portion (403) constitutes a spring limiting surface (4031), and the other end constitutes the rocker action surface (401); a portion of the second elastic member (10) is sleeved outside the pin (402), and one end abuts against the spring limiting surface (4031), and the other end abuts against the handle (2).

19. The device with telescopic tubes according to any one of claims 12 to 17, characterized in that The locking pin (4) and the handle (2) cooperate with each other via a limiting structure, and the limiting structure is used to enable the locking pin (4) to move in a direction perpendicular to the axis of the tube body.

20. The device with telescopic tubes according to any one of claims 12 to 17, characterized in that The unlocking button (9) comprises a push rod (901), a limiting hole (205) is provided in the handle (2), the push rod (901) passes through the limiting hole (205), and the axis of the limiting hole (205) is perpendicular to the axis of the tube body.

21. The device with telescopic tubes according to claim 20, characterized in that The push rod (901) is provided with a step portion (902), and when the step portion (902) abuts against the outer peripheral end surface of the limiting hole (205), the limiting hole (205) prevents the unlocking button (9) from continuing to be pressed and moved.

22. The device with telescopic tubes according to any one of claims 12 to 17, characterized in that The unlock button (9) is connected to a first engaging portion (903), and the main body (1) is provided with a second engaging portion (101). When the telescopic tube is in a fully retracted state and the unlock button (9) is not pressed, the second engaging portion (101) cooperates with the first engaging portion (903) to prevent the handle (2) from moving in a direction away from the main body (1). When the unlock button (9) is pressed, the second engaging portion (101) separates from the first engaging portion (903).

23. The device with telescopic tube according to claim 22, characterized in that A connecting portion (904) is provided on one side of the lower end of the unlocking button (9), the first engaging portion (903) is provided above the connecting portion (904), the lower surface of the connecting portion (904) is a downward pressing surface (9041), when the telescopic tube is in a fully extended state, the bumping ball embedded in the bumping ball hole of the outermost tube body is located below the downward pressing surface (9041), and when the unlocking button (9) is pressed, the downward pressing surface (9041) is suitable for compressing the bumping ball embedded in the bumping ball hole of the outermost tube body.

24. The device with telescopic tubes according to any one of claims 1 to 8, 10, 12 to 17, characterized in that The device with the telescopic tube is a cleaning device.

Images