A sleeve connection pipe and a dust collector

Abstract

The invention provides a sleeve type connecting pipe, the first section of which comprises a pivoting part, the sleeve is provided with a limiting protrusion, the sleeve is sleeved into the first section so that the limiting protrusion is installed in place, after being installed in place, the limiting protrusion is limitedly matched with the limiting surface of the pivoting part, the sleeve is provided with a compression spring in the interval between the sleeve connection of the first section, after being installed in place, the compression spring is simultaneously limited between the limiting part of the sleeve and the spring limiting end in the process of sleeving the sleeve, when the locking of the sleeve is released, the compression spring releases the elastic potential energy to drive the sleeve to move to release the limiting of the sleeve connection of the second section, at the same time, at the rotatable position, the compression state of the compression spring is limitedly matched with the limiting surface to maintain the sleeve at the rotatable position, the invention has the structure of automatically moving the sleeve and the limiting structure of better maintaining the sleeve at the rotatable position, and is convenient to assemble; the invention also provides a dust collector adopting the sleeve type connecting pipe.

Description

Technical Field

[0001] This invention relates to the field of cleaning appliance technology, specifically a sleeve-type connecting pipe and a vacuum cleaner. Background Technology

[0002] Vacuum cleaners typically connect to a working connector via a connecting tube. To better control the suction direction, existing technology has proposed a connecting tube that differs from a flexible hose. This connecting tube cannot be easily bent but is equipped with a rotating joint. By rotating the joint, the relative position between adjacent segments can be changed, allowing the user to control the working position of the working connector by rotating the working connector around the rotating joint to adjust the direction. For example, a floor cleaning device with authorization announcement number CN202020379U includes: a floor cleaning head; a column that can be connected to the floor cleaning head and includes two segments; a connector that can be disposed between the two column segments and arranged to allow the two column segments to move between two different angular orientations; the connector includes a locking element and an opposing unlocking member. In two different angular positions corresponding to the two different angular orientations of the column segments, the locking element is biased to a locked position, and the unlocking member can be selectively actuated against the locking element to move the locking element to an unlocked position, thereby realizing the angular adjustment of the connector between the two different angular positions.

[0003] Industry experts have also proposed, for example, a vacuum cleaner diverter and handheld vacuum cleaner disclosed in CN205548452U. This diverter includes a first and second connecting pipe rotatably connected from one end, a connecting tube for connecting the mating ends of the rotatably connected first and second connecting pipes, and conductive components located within and connected to the first and second connecting pipes respectively. The connecting tube is a flexible hose. The other ends of the first and second connecting pipes respectively connect the vacuum cleaner body of the handheld vacuum cleaner to the vacuum tube or the vacuum tube to the vacuum head. This invention, through the diverter, allows the handheld vacuum cleaner to be quickly and upright, while the operator can achieve multi-angle, all-around dust removal in a natural state, which is very convenient. Furthermore, it has a simple structure and low cost.

[0004] For example, the bending and locking mechanism of a vacuum cleaner hose with publication number CN102715871A solves the problem of pivot axis offset, but the structure is extremely complex. The vacuum cleaner tube with publication number CN208114562U simplifies the structure, but requires sufficient space for the press plate 6 to flip outward. In addition, the locking position cannot be flush with the vacuum cleaner tube, that is, the locking position is offset relative to the axis of the vacuum cleaner tube. Furthermore, because the press plate 6 and other flipping structures are required, the angle of the vacuum cleaner tube is limited by the flipping structure.

[0005] As mentioned above, none of the aforementioned technologies address how to improve the bending strength of two relatively bendable column segments (or the first and second connecting pipes) under locked conditions, especially the bending strength when the two column segments are in a straight state (i.e., the two column segments are located on the same straight line and locked). Furthermore, as mentioned above, for connecting pipes that require both locking and bendability, there are many influencing factors involved, making improvement difficult. The applicant has conducted in-depth research and proposed a new technical solution for connecting pipes, namely, a sleeve-type connecting pipe. This sleeve-type connecting pipe has good bending resistance while achieving bend control.

[0006] To enable the sleeve of the sleeve-type connecting pipe to move automatically after unlocking, the applicant has also designed a moving structure. In addition, to ensure that the sleeve is well maintained in the rotatable position, a limiting structure is also provided. Although this adds automatic movement function and improves user convenience, the structure also needs to be improved and expanded, and there are many problems to be solved. At the same time, the connecting pipe itself cannot be made too large, and there are high requirements for the structural dimensions and the appearance must be regular, which brings great difficulties to the implementation and also poses great problems for assembly. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the defects of the prior art and propose a sleeve-type connecting tube, which has an automatic moving sleeve structure and a limiting structure that keeps the sleeve in a rotatable position, and is easy to assemble; and also proposes a vacuum cleaner that uses the aforementioned sleeve-type connecting tube.

[0008] Compared to existing technologies, this invention proposes a sleeve-type connecting pipe, comprising a first segment, a second segment, and a sleeve. The first segment and the second segment are pivotally connected, and the sleeve is linearly movable. This linear movement results in two positional changes: a locked position and a rotatable position. In the locked position, the sleeve is sleeved with both the first and second segments. In the rotatable position, the sleeve is disengaged from the second segment, and the first and second segments are restored to a state where they can rotate relative to each other. The first segment includes a pivot portion, and the sleeve has a limiting protrusion. The sleeve is inserted into the first segment from the end of the first segment away from the pivot portion. The segment allows the limiting protrusion to be installed in place. After the limiting protrusion is installed in place, it can be limited and engaged with the limiting surface of the pivot part. A compression spring is provided in the sleeve-first segment sleeve connection gap. After the limiting protrusion is installed in place, the compression spring is simultaneously limited by the sleeve sleeve connection process between the limiting part of the sleeve and the limiting end of the spring. The compression spring is in a compressed state. When the sleeve is released from locking, the compression spring releases elastic potential energy to drive the sleeve to move and release the sleeve connection limit of the second segment. At the same time, in the rotatable position, the compressed state of the compression spring cooperates with the limiting surface to limit and maintain the sleeve in the rotatable position.

[0009] As an improvement, the spring-limiting end is provided by the pivoting part.

[0010] As an improvement, the pivoting part consists of two roughly symmetrical parts. The columnar part, after being spliced ​​together, is fitted and fixed to the first segment, and the inner end of the columnar part also serves as a locking connection part.

[0011] As an improvement, the compression spring is sleeved around the outer periphery of the first segment.

[0012] As an improvement, the end of the sleeve near the second segment is provided with a locking connection end, and the end of the second segment near the first segment is provided with a locking connection part. The locking connection end and the locking connection part are locked / unlocked.

[0013] As an improvement, the outer periphery of the sleeve is provided with a receiving part, the receiving part is equipped with an operating part, and the operating part is provided with the aforementioned locking connection end.

[0014] As an improvement, the pivot part is provided with an axially inclined guide in the circumferential direction, and the limiting protrusion is guided into place by the inclined guide.

[0015] As an improvement, the limiting surface is provided with a notch, and the limiting protrusion can be matched with the notch for limiting.

[0016] As an improvement, a guide structure is also included, which includes a first segment of a flat tube and a flat hole that mates with the flat tube. The flat hole is located at one end of the sleeve away from the pivot portion, and the other end of the sleeve is also provided with a limiting portion of the sleeve. A limiting protrusion is provided radially on the inner circumference of the other end of the sleeve.

[0017] With the above structure, compared with the prior art, the present invention has the following advantages: The present invention, in this design, also achieves an assembly structure, namely, first connecting the first segment to the pivot part, then inserting a compression spring from the end of the first segment away from the pivot part, and then continuing to insert a sleeve from that end. The compression spring is then fitted between the sleeve and the first segment. As the sleeve is further inserted, the limiting protrusion overcomes the elasticity of the compression spring and further reaches the limiting surface. When the limiting protrusion and the limiting surface complete the limiting engagement, the limiting protrusion is in place, and the compression spring is compressed. Furthermore, the compression spring is positioned between the limiting part of the sleeve and the spring limiting end provided by the pivoting part. If the sleeve continues to move linearly towards the second segment, the sleeve can be locked to the second segment. When unlocking, the sleeve can automatically retract due to the action of the compression spring. After the sleeve automatically retracts, the compression spring remains compressed, releasing only a portion of its elastic potential energy. Under the combined action of the compression spring, the limiting protrusion, and the limiting surface, the sleeve remains stably positioned with almost no wobble. In other words, the sleeve is well maintained in its rotatable position. With the above structural design, it has… The technical advantages are as follows: Firstly, installation is extremely convenient. The first segment, sleeve, compression spring, and pivoting part are assembled with simple installation, simultaneously compressing the compression spring without the need for special tools. Furthermore, installation is complete immediately after installation, eliminating the need for calibration measures such as adjusting the compression amount of the compression spring. Secondly, unlike the second segment, there is no need for an additional locking connection to provide end-face contact for limiting the position. This eliminates a significant structural element. If an additional locking connection were used for end-face limiting, the first segment would have an extra ring of structure, resulting in poor diameter uniformity. This extra ring would be particularly noticeable in the locked position, affecting the overall appearance. Using other structures would require additional limiting structures in the first segment, increasing structural complexity. In short, the aforementioned design eliminates the need for an additional structure in the first segment, greatly simplifying the structure. Moreover, it achieves convenient and efficient assembly, structural simplicity, and control over overall dimensions, while also concealing the limiting structure internally.

[0018] Compared with the prior art, the present invention also proposes a vacuum cleaner, including the above-mentioned sleeve-type connecting tube.

[0019] Compared with the prior art, the present invention has the following advantages after adopting the above structure: The above sleeve-type connecting pipe not only has better performance, that is, on the one hand, it can better realize the bending control of the first section and the second section, thus facilitating the use of the vacuum cleaner, but also has good bending resistance, that is, it has better stability performance when the first section and the second section are locked in a straight line. Moreover, the production and assembly are very convenient, which is conducive to ensuring mass production quality and reducing costs.

[0020] As an improvement, the first segment is equipped with a first joint, and the second segment is equipped with a second joint, with the first joint on top and the second joint on the bottom. After unlocking, the anti-bending component moves upward along the axis of the first segment to reach a rotatable position; conversely, the locking is restored by moving the anti-bending component downward along the axis of the first segment. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a sleeve-type connecting pipe.

[0022] Figure 2 for Figure 1 A three-dimensional schematic diagram after removing the bending resistance component.

[0023] Figure 3 This is a three-dimensional schematic diagram of the first segment.

[0024] Figure 4 This is a three-dimensional schematic diagram of the second segment.

[0025] Figure 5 This is a three-dimensional schematic diagram of the sleeve-type connecting pipe in the locked position.

[0026] Figure 6 This is a three-dimensional schematic diagram of the sleeve-type connecting pipe in a rotatable position after unlocking.

[0027] Figure 7 This is a three-dimensional schematic diagram of the first and second segments after they have rotated around the pivot connection.

[0028] Figure 8 This is a magnified three-dimensional schematic diagram showing one end of the sleeve.

[0029] Figure 9 This is a magnified three-dimensional schematic diagram showing the other end of the sleeve.

[0030] Figure 10 This is a schematic diagram of the end face of another type of sleeve.

[0031] Explanation of reference numerals in the attached drawings: 1-First segment, 2-Second segment, 3-Anti-bending component, 4-Operating part, 5-Bayonet, 6-Spring limiting end, 7-First ball socket, 8-Second ball socket, 9-Rotating shaft, 10-Shaft hole, 11-First connector, 12-Second connector, 13-Locking connection part, 14-Accommodation part, 15-Flat hole, 16-Hose, 17-Limiting protrusion, 18-Inclined guide part, 19-Limiting surface, 20-Limiting part, 21-Notch. Detailed Implementation

[0032] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The embodiments described below are merely examples, and other obvious variations will arise for those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0033] The present invention will now be described in further detail:

[0034] like Figure 1 As shown, this is a sleeve-type connecting pipe, hereinafter referred to as the connecting pipe. Specifically, in the locked position, preferably, the axes of the bending-resistant member 3, the first segment 1, and the second segment 2 are coaxial, resulting in a compact structure and a smaller overall radial dimension. Preferably, the bending-resistant member 3 is a sleeve, and in the locked position, i.e., the connecting rod is straight, as shown... Figure 1 , 5 As shown, the sleeve is respectively fitted onto the first segment 1 and the second segment 2, with the sleeve on the outside and the parts of the first segment 1 and the second segment 2 fitted onto the inside of the sleeve. In the rotatable position, as shown... Figure 6 , 7 As shown, the sleeve is disconnected from either the first segment 1 or the second segment 2. In this example, the sleeve is disconnected from the second segment 2. This restores the first segment 1 and the second segment 2 to a state where they can rotate relative to each other. This design results in a relatively simple structure and allows for smaller axial and radial dimensions, while maintaining strong bending resistance. In short, by achieving bending control of the first segment 1 and the second segment 2 and possessing good bending resistance, the performance requirements of the fishing test can be well met. The fishing test is a bending test conducted when the first segment 1 and the second segment 2 are in a straight-line locked state.

[0035] The sleeve can be circumferentially closed, or it can be as follows: Figure 10 The structure shown has an axial opening, meaning the sleeve can be circumferentially open, which is also possible. The sleeve structure can also take other forms; for example, opening holes in the sleeve to reduce weight, forming a sleeve with multiple holes.

[0036] Preferably, it also includes a locking structure for locking the sleeve to at least one of the first segment 1 and the second segment 2 in the locked position, i.e., in the locked position, such as... Figure 1 , 5 As shown, the sleeve is locked to the second segment 2, thereby fixing the sleeve, the first segment 1, and the second segment 2 relatively. The sleeve cannot move freely in a straight line, ensuring the reliability and stability of the connecting pipe when it is in the locked position.

[0037] Preferably, the locking structure is located at either end of the sleeve. This facilitates the installation of the locking structure, and placing it at either end avoids compromising the circumferential integrity of the bending-resistant member 3, thus preventing damage to the circumferential integrity of the sleeve. This helps the sleeve provide better 360-degree bending resistance. Furthermore, the aforementioned design ensures good circumferential regularity of the bending-resistant member 3, thereby achieving a shorter axial length while providing a comfortable grip for the user.

[0038] In this example, to further simplify the structure, facilitate the installation of a locking structure at either end, and control the overall structural dimensions, the locking structure includes a buckle and a latch 5. The buckle is located on the operating part 4, which is installed on the outer periphery of the bending member 3, i.e., the outer periphery of the sleeve. The operating part 4 uses a rocker switch, which is partially housed in the receiving part 14. When one end of the rocker switch is pressed, the other end tilts up. The other end is equipped with a buckle, and the latch 5 is located in one of the first segment 1 or the second segment 2. Figure 2 As shown, the latch 5 is located at the end of the second segment 2 near the first segment 1. For more reliable locking, the second segment 2 is provided with a locking connection part 13, which is sleeved and fixed to the end of the second segment 2 near the first segment 1. The latch 5 is circumferentially arranged on the locking connection part 13. In this example, the working principle of the lock structure is that by pressing the other end of the lifting operation part 4, the latch and latch 5 are unlocked. When the press is released, the seesaw switch resets.

[0039] Preferably, the device also includes a movable structure. When the locking structure is released, this movable structure automatically moves the anti-bending member 3 to the rotatable position. This enables the automatic opening of the anti-bending member 3 upon unlocking. When the user needs the bending function, the user only needs to press the operating part 4 to unlock, causing the anti-bending member 3 to automatically move linearly to the rotatable position, greatly facilitating user operation. For a simple and compact structure, the movable structure includes an elastic element to provide the automatic opening force. One end of the elastic element is limited, and the other end is connected to the anti-bending member 3. When the locking structure is released, this elastic element moves the anti-bending member 3 to the rotatable position.

[0040] In this example, to further simplify the structure, facilitate assembly, and control the overall structural dimensions, a spring is fitted inside the sleeve. When the locking structure is released, the spring drives the sleeve to the rotatable position.

[0041] In this example, the spring is installed within the sleeve connection interval between the sleeve and one of the first segment 1 and the second segment 2. That is, the spring is located only in one of the first segment 1 and the second segment 2. In this example, it is sleeved on the outer periphery of the first segment 1. The outer periphery of the first segment 1 is provided with a spring limiting end 6. With this design, the moving structure is independent of the second segment 2. That is, there is no need to make corresponding arrangements on the second segment 2 in order to set up the moving structure. Therefore, on the one hand, it is conducive to further simplifying the structure, and on the other hand, it is convenient to assemble and simpler to install.

[0042] Preferred, such as Figure 6 As shown, when the locking structure is released, the spring releases its elastic potential energy to move the sleeve to the rotatable position. The sleeve is located in the segment containing the spring between the first segment 1 and the second segment 2; in this example, it is located in the first segment 1. This greatly facilitates assembly; the sleeve and spring can be installed in the first segment 1 first, and at this point, the pivoting structure is exposed. Therefore, the first segment 1 and the second segment 2 can be easily pivotally connected. In other words, the above arrangement helps to avoid affecting the assembly of the pivoting structure.

[0043] Preferably, the spring is a compression spring. Before the locking structure is released, the spring is in a compressed state. This design makes it easy to arrange the spring. In addition, the use of a compression spring in conjunction with the setting of the spring limit end 6 further facilitates installation.

[0044] Preferably, it also includes a limiting structure, which is used to limit the sleeve from exceeding the moving position. That is, in the locked position, the sleeve will not exceed the bayonet 5. In this example, the limiting purpose is achieved by the end face of the sleeve cooperating with the end face of the locking connection part 13. At the same time, the locking structure is used to maintain it in the locked position. In the rotatable position, after the compression spring pushes the sleeve open through the limiting structure, the sleeve will not move further outward. For example, a limiting baffle is set to limit the sleeve from moving further outward. The present invention can be further configured such that, in the rotatable position, the sleeve will not move further outward because it is limited by the limiting baffle. If the compression spring still has a certain amount of compression, then the sleeve will be well positioned by the compression spring and the limiting baffle, thereby achieving the purpose of the sleeve not easily shaking in the rotatable position, that is, maintaining it in the rotatable position. The limiting structure can also be other structures, such as setting two latching structures. The first latching structure is located in the first segment 1, and the second latching structure is located in the second segment 2. In the locked position, the sleeve is positioned in the locked position by the second latching structure, and the locking structure is to strengthen the locking. In the rotatable position, the sleeve is positioned in the rotatable position by the first latching structure. At this time, the elastic support of the compression spring is not needed. The first latching structure can also be replaced by a first elastic ball and a first recessed fitting structure. Similarly, the second latching structure can be replaced by a second elastic ball and a second recessed fitting structure. There can also be other structures, which will not be described in detail here.

[0045] Specifically, in this example, to achieve limiting in the rotatable position, and to facilitate the installation of the first segment 1, sleeve, compression spring, and the pivoting part of the first segment 1 (which corresponds to the first ball socket 7 described below in this example), the present invention designs a special structure. Specifically, the pivoting part is circumferentially provided with an axially arranged inclined guide portion 18. The inclined guide portion 18 can be two or more symmetrical. The sleeve is provided with limiting protrusions 17 that can be guided and installed via the inclined guide portions 18. The number of limiting protrusions 17 is the same as that of the inclined guide portions 18. The quantities are consistent and set one-to-one. After the limiting protrusion 17 is installed in place, it can be limited and cooperated with the limiting surface 19 of the pivot part. This design realizes an assembly structure, that is, first connect the first segment 1 to the pivot part, then put the compression spring into the end of the first segment 1 away from the pivot part, and then continue to put the sleeve into the end from that end. The compression spring is then put into the sleeve and the first segment 1. As the sleeve is put in further, the limiting protrusion 17 will be guided and installed by the inclined guide part 18 and will further pass the inclined guide part 18 to reach the limiting surface 19 when overcoming the elasticity of the compression spring. At this time, the compression spring is compressed and limited by the limiting part 20 of the sleeve and the spring provided by the pivot part. Between the limiting ends 6, the compression spring can be compressed, allowing the limiting protrusion 17 to pass over the inclined guide portion 18 and reach the limiting surface 19. Under the combined action of the compression spring, the limiting protrusion 17, and the limiting surface 19, the sleeve is stably limited with almost no shaking. The technical advantages of this structural design are: firstly, installation is extremely convenient; the first segment 1, sleeve, compression spring, and pivoting part are assembled with simple installation, simultaneously compressing the compression spring without the need for special tools. Furthermore, installation is complete immediately afterward, eliminating the need for calibration measures such as adjusting the compression amount of the compression spring. Secondly, unlike the second segment 2, there is no need to additionally set a locking connection portion 13 to achieve limiting. The design eliminates the need for an additional locking connection 13 on the first segment 1 to provide end face fit for positioning. This eliminates the need for a large structure. If an additional locking connection 13, similar to that in the second segment 2, were used to provide end face positioning, the first segment 1 would have an extra ring of structure, resulting in poor diameter uniformity. This extra ring would be particularly noticeable in the locked position, affecting the overall appearance. If other structures were used, additional positioning structures would be required on the first segment 1, increasing structural complexity. In short, the design eliminates the need for an additional structure on the first segment 1, greatly simplifying the structure. Furthermore, it achieves convenient and efficient assembly, structural simplicity, and control over overall dimensions, while also concealing the positioning structure internally.

[0046] Preferably, in order to make it easier for the limiting protrusion 17 to reach the limiting surface 19, and also to facilitate the sleeve to move a longer distance in a straight line to expose the pivot part, the limiting surface 19 is provided with a notch 21, and the limiting protrusion 17 can be limited and matched with the notch 21, thus shortening the distance to reach, and the assembly is completed as long as the notch 21 is reached.

[0047] Preferably, the pivoting structure adopts a ball-and-socket rotational fit structure and is provided with a rotating shaft 9 and a shaft hole 10. The relative bending direction of the first segment 1 and the second segment 2 is limited by the rotational fit of the rotating shaft 9 and the shaft hole 10. That is, the first segment 1 and the second segment 2 can only rotate relative to each other around the rotation axis of the rotating shaft 9 and the shaft hole 10. Specifically, in this example, as shown... Figure 3 , 4 As shown, the first segment 1 has a first ball socket 7, and the second segment 2 has a second ball socket 8. The first ball socket 7 and the second ball socket 8 are rotatably fitted. Furthermore, the spherical outer surface of the first ball socket 7 is provided with rotating shafts 9 on both sides, and the corresponding spherical inner surface of the second ball socket 8 is provided with shaft holes 10 that mate with the corresponding rotating shafts 9. The rotating shafts 9 and shaft holes 10 are rotatably fitted. With this design, firstly, existing technologies mainly rely on the rotatable fit between the rotating shafts 9 and shaft holes 10 to achieve rotation, while this invention not only has the rotatable fit between the rotating shafts 9 and shaft holes 10, but also the rotatable fit between the two ball sockets. This results in better stability and reliability of rotation, making it less prone to loosening and improving structural strength. Secondly, the above structural design facilitates the mass production of the first ball socket 7 and the second ball socket 8 using plastic materials. This is because plastic materials for the first ball socket 7 and the second ball socket 8 improve production efficiency and reduce production costs. However, the first ball socket 7 and the second ball socket 8 made of plastic materials... The second ball socket 8 itself cannot be made with very high precision and thickness. Therefore, with the above structure, it not only has the rotational fit between the rotating shaft 9 and the shaft hole 10, but also the rotational fit between the two ball sockets. This is beneficial for the plastic material so that the first ball socket 7 and the second ball socket 8 can also achieve good rotational stability and reliability after being connected. This can achieve the goal of improving production efficiency and reducing production costs, while also achieving good rotational stability and reliability. On the other hand, the existing technology requires a locking structure around the rotating shaft 9 and the shaft hole 10, so it is not suitable to use a ball socket rotational fit structure. However, the design of the sleeve and ball socket fit structure in this invention relieves the burden of setting a locking structure around the rotating shaft 9 and the shaft hole 10, thus making the ball socket rotational fit structure more suitable for this invention.

[0048] In this example, as Figure 3 , 4As shown in Figure 7, a first opening is provided on one side of the second ball socket 8. The first opening allows the first segment 1 and the second segment 2 to rotate relative to each other through one side of the first opening. The first opening also enables a larger relative rotation angle between the first segment 1 and the second segment 2 based on the ball socket rotation fit structure.

[0049] In this example, to facilitate a sealed connection, the first segment 1 and the second segment 2 are sealed together by a flexible hose 16. Therefore, to better accommodate the bending of the flexible hose 16 during rotation, the first ball socket 7 is also provided with a second opening. This second opening facilitates the assembly of the flexible hose 16 and better accommodates the bending of the flexible hose 16. In this example, the flexible hose 16 is a conductive flexible hose 16, so the connecting pipe of the present invention can simultaneously achieve the functions of bending and conductivity.

[0050] In this example, the first socket 7 and the second socket 8 are both made up of two roughly symmetrical parts, which facilitates production and assembly.

[0051] In addition, for reliable connection, both the first ball socket 7 and the second ball socket 8 are provided with columnar parts. The columnar part of the first ball socket 7 after splicing the two parts is connected and fixed to the first segment 1, and the columnar part of the second ball socket 8 after splicing the two parts is connected and fixed to the second segment 2.

[0052] In addition, the inner end of the columnar part of the first ball socket 7 also serves as the locking connection part 13. This design eliminates the need for an additional spring limiting structure in the first segment 1, as the inner end of the columnar part of the first ball socket 7 solves the problem, making the overall structure simple and compact.

[0053] Preferably, the pivot axis of the first segment 1 and the second segment 2 is centrally located and intersects with the same axis. That is, in this example, the pivot axis is not offset relative to the same axis. The technical advantages of this design are that, on the one hand, the radial dimension can be smaller, and on the other hand, if a hose 16 is used, only a shorter hose 16 is needed to complete the sealing connection between the first segment 1 and the second segment 2, and the same rotation angle. Compared with the offset setting, the centrally located pivot axis results in a smaller radius between the rotation axis and the outer side of the hose 16, so the degree of stretching is smaller. In addition, if the first segment 1 and the second segment 2 are set to be able to rotate relative to each other in both directions, the aforementioned design is beneficial to the uniformity of the stretching deformation of the hose 16, avoiding premature fatigue failure due to the side with greater stretching, as is the case with the offset structure.

[0054] It also includes guide structures, such as in this example, Figure 8As shown, the guide structure includes a first segment 1 made of a flat tube and a flat hole 15 that mates with the flat tube. The flat hole 15 is located on the sleeve. Through the guiding engagement between the flat tube and the flat hole 15, the guide structure guides the sleeve to move along the same axis without circumferential rotation. Thus, when the buckle and the locking latch 5 are reconnected, the guide structure guides the sleeve back to the locked position, aligning and locking the locking mechanism. The user can easily lock the sleeve without special attention. The guide structure can also be other structures, such as a guide groove in the first segment 1 and a guide protrusion in the sleeve, with the guide groove and guide protrusion engaging in a guiding engagement.

[0055] The bending-resistant member 3 can also adopt other structures, such as a connecting rod, which can be linearly connected to the first segment 1 and the second segment 2, serving as the bending-resistant member. In summary, the sleeve-type bending-resistant member 3 is a preferred structure of this invention. Of course, other structural forms of the bending-resistant member 3 can also be used; any structure of the bending-resistant member 3 suitable for this invention can be applied to this invention.

[0056] The design of the connecting pipe of the present invention also facilitates the simplification of the tubular design. In other words, it is beneficial that there are not too many additional visible or protruding structural parts in the circumference of the connecting pipe, resulting in a high degree of simplicity in the circumference of the connecting pipe.

[0057] The connecting tube described in this application can be used in existing vacuum cleaners, including handheld and canister vacuum cleaners. One or multiple connecting tubes can be used, depending on the specific design requirements.

[0058] One end of the connecting tube is provided with a first connector 11, and the other end is provided with a second connector 12. The first connector 11 is connected to the vacuum cleaner main unit, and the second connector 12 is connected to the vacuum cleaner's functional nozzle. The functional nozzle can be a floor brush, side brush, dust mite brush, floor scrubbing brush, etc.

[0059] In this example, after unlocking, the sleeve moves upward along the axis of the first segment 1 to a rotatable position. Because of the movable structure, the sleeve rises automatically. (See reference...) Figure 7 understand, Figure 7 This can be understood as the connecting tube being in a bent working state when the user is using a vacuum cleaner, with the first connector 11 on top and the second connector 12 on the bottom. As can be seen, the raised sleeve is closer to the user, making it easier for the user to operate. That is, it is convenient for the user to push the sleeve back in the opposite direction to restore the lock. In addition, since a compression spring is used, this downward push-back direction also makes it easier for the user to exert more effort, resulting in a better user experience.

[0060] When understanding this invention, the above structure may be referred to other embodiments / appendices if necessary. Figure 1 And that is understood, so I will not elaborate further here.

[0061] The above description is merely an illustrative embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features, and principles described in the scope of protection of the present invention are included within the scope of protection of the present invention.

Claims

1. A sleeve-type connecting pipe, comprising a first segment, a second segment, and a sleeve, wherein the first segment and the second segment are pivotally connected, and the sleeve is linearly movable, the linear movement resulting in two positional changes: a locked position and a rotatable position. In the locked position, the sleeve is sleeved with both the first segment and the second segment; in the rotatable position, the sleeve is disengaged from the second segment, and the first segment and the second segment return to a state where they can rotate relative to each other. The characteristic feature is that... The first segment includes a pivoting part. The sleeve is provided with a limiting protrusion. The sleeve is inserted into the first segment from the end away from the pivoting part so that the limiting protrusion is installed in place. After the limiting protrusion is installed in place, it can be limited and engaged with the limiting surface of the pivoting part. A compression spring is provided in the sleeve-fitting gap between the sleeve and the first segment. After the limiting protrusion is installed in place, the compression spring is simultaneously limited by the sleeve fitting process between the limiting part of the sleeve and the limiting end of the spring. The compression spring is in a compressed state. When the sleeve is released from locking, the compression spring releases elastic potential energy to drive the sleeve to move and release the sleeve fitting limitation of the second segment. At the same time, in the rotatable position, the compressed state of the compression spring cooperates with the limiting surface to maintain the sleeve in the rotatable position. The pivot part is provided with an axially arranged inclined guide part in the circumferential direction. There are two or more inclined guide parts. The sleeve is provided with a limiting protrusion that can be guided and installed through the inclined guide part. The number of limiting protrusions is the same as the number of inclined guide parts and they are set one by one. As the sleeve is inserted into the pivoting part, the limiting protrusion will be guided and installed via the inclined guide and will further cross the inclined guide to reach the limiting surface when overcoming the elasticity of the compression spring. At this time, the compression spring is compressed and limited between the limiting part of the sleeve and the spring limiting end provided by the pivoting part. Under the combined action of the compression spring, the limiting protrusion, and the limiting surface, the sleeve is limited and stable. The end of the sleeve near the second segment is provided with a locking connection end, and the end of the second segment near the first segment is provided with a locking connection part. The locking connection end and the locking connection part are locked / unlocked.

2. The sleeve-type connecting pipe according to claim 1, characterized in that, The pivot section consists of two roughly symmetrical parts. The columnar part, after being spliced ​​together, is fitted and fixed to the first segment. The inner end of the columnar part also serves as a locking connection.

3. The sleeve-type connecting pipe according to claim 1, characterized in that, The compression spring is sleeved on the outer periphery of the first segment.

4. The sleeve-type connecting pipe according to claim 1, characterized in that, The outer periphery of the sleeve is provided with a receiving part, the receiving part is equipped with an operating part, and the operating part is provided with the aforementioned locking connection end.

5. The sleeve-type connecting pipe according to claim 1, characterized in that, The limiting surface is provided with a notch, and the limiting protrusion can cooperate with the notch for limiting.

6. The sleeve-type connecting pipe according to claim 1, characterized in that, It also includes a guide structure, which includes a first segment of a flat tube and a flat hole that mates with the flat tube. The flat hole is located at one end of the sleeve away from the pivot portion. This end is also provided with a limiting portion of the sleeve, and the other end of the sleeve has a limiting protrusion radially on its inner circumference.

7. A vacuum cleaner employing the sleeve-type connecting pipe as described in any one of claims 1 to 6, characterized in that, The vacuum cleaner includes the sleeve-type connecting tube.

8. The vacuum cleaner according to claim 7, characterized in that, The first segment has a first connector, and the second segment has a second connector. The first connector is on top and the second connector is on the bottom. After unlocking, the anti-bending component moves upward along the axis of the first segment to reach a rotatable position. Conversely, the locking is restored by moving the anti-bending component downward along the axis of the first segment.

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