Telescopic rod connecting piece and telescopic rod
By adopting a combined structure of a tightening sleeve and an inner guide rod in the telescopic rod connection, the problems of complex structure and many parts in the prior art are solved, and the effects of simplifying the structure, reducing parts and reducing costs are achieved.
Patent Information
- Application Number
- CN202421721819.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-18
- Publication Date
- 2025-05-20
- Estimated Expiration
- 2034-07-18
AI Technical Summary
The existing telescopic rod connectors have complex structures and a large number of parts, making it difficult to simplify.
The combined structure of the expansion sleeve and the inner guide rod is adopted. The expansion sleeve can be opened or retracted to lock or unlock the inner and outer tubes. The inner guide rod realizes the axial movement of the expansion sleeve through the cooperation of the spiral groove and the positioning member.
The structure of telescopic rod connectors is simplified, the number of parts is reduced, the processing cost is reduced, and the locking and unlocking functions are realized.
Smart Images
Figure CN222887127U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of telescopic rods, and particularly relates to a telescopic rod connecting piece and a telescopic rod. Background Art
[0002] Telescopic rods can be seen everywhere in life, such as bathroom drying rods, telescopic curtain rods, telescopic clothes drying rods, mop poles, etc. At present, the inner tube and the outer tube of a telescopic rod are generally locked by means of a threaded sleeve, a snap fit, etc. In related technologies, the inner tube and the outer tube are locked and unlocked through a telescopic rod connecting piece. When the telescopic rod connecting piece is locked, the inner tube and the outer tube are locked and fixed; when the telescopic rod connecting piece is unlocked, the inner tube and the outer tube can move along their axes to adjust the length of the telescopic rod. At present, most telescopic rod connecting pieces use the cooperation of internal threads and external threads to achieve rotational forward and backward movement. This method has a complex structure and a large number of components.
[0003] The above content is only used to assist in understanding the technical solution of the utility model, and does not represent an admission that the above content is prior art. Summary of the Utility Model
[0004] In view of the above problems, the present utility model proposes a telescopic rod connecting piece, aiming to simplify the structure of the telescopic rod connecting piece and reduce the number of components.
[0005] To achieve the above object, the telescopic rod connecting piece proposed by the present utility model is used to connect an inner tube and an outer tube. Among them, the telescopic rod connecting piece includes a tightening sleeve and an inner guide rod;
[0006] The tightening sleeve is used to be tightened inside the outer tube. The tightening sleeve can expand to increase its outer diameter or retract to decrease its outer diameter. The tightening sleeve is provided with a spiral groove;
[0007] The inner guide rod is used to connect the inner tube. The inner guide rod is rotatably arranged inside the tightening sleeve around its axis. The inner guide rod is provided with a positioning member corresponding to the spiral groove. The positioning member can be slidably installed in the spiral groove to drive the inner guide rod to reciprocate relative to the tightening sleeve along its axial direction between a locking position and an unlocking position when the inner guide rod rotates; in the locking position, the tightening sleeve expands to tightly fit with the outer tube, and in the unlocking position, the tightening sleeve can radially retract relative to the inner guide rod inside the outer tube.
[0008] In one embodiment, the tightening sleeve includes a positioning section and a tightening section connected along the axial direction of the inner guide rod. The spiral groove is formed on the positioning section. The tightening section includes at least two free parts arranged at intervals in the circumferential direction of the inner guide rod; in the locking position, the plurality of free parts open relative to each other, and in the unlocking position, the plurality of free parts can contract relative to each other.
[0009] In one embodiment, the free ends of the plurality of free portions are located at one end of the expansion section away from the positioning section.
[0010] In one embodiment, the gap between two of the free portions communicates with the starting end of the spiral groove, and the positioning member can be disengaged from the expansion sleeve through the gap between the two free portions.
[0011] In one embodiment, the positioning member is a positioning post, and a positioning groove communicating with the end of the spiral groove is further formed on the expansion sleeve. The inner side wall of the positioning groove is arranged at an angle with the inner side wall of the spiral groove, and the positioning post is fitted and embedded in the positioning groove.
[0012] In one embodiment, the expansion sleeve further includes a connecting section connected between the positioning section and the expansion section, and the thickness of the connecting section is smaller than the thicknesses of the positioning section and the expansion section.
[0013] In one embodiment, the outer peripheral wall of the expansion section is recessed around its circumference to form the installation section.
[0014] In one embodiment, the inner guide rod includes a tapered section, and the outer diameter of the tapered section gradually increases from the positioning section to the expansion section. The tapered section is at least correspondingly arranged to fit the expansion section.
[0015] In one embodiment, the inner guide rod further includes an installation section connected to one side of the tapered section close to the positioning section. The positioning member is arranged on the installation section. The outer diameter of the installation section is smaller than the outer diameter of the tapered section, and the expansion sleeve can be sleeved outside the tapered section through the installation section.
[0016] In one embodiment, the installation section includes an inner tube connection section and a fixed section. The fixed section is connected between the inner tube connection section and the tapered section; the positioning section is sleeved outside the fixed section; at least two notch grooves are formed on the end face of the inner tube connection section far from the tapered section. The at least two notch grooves are circumferentially spaced on the inner tube connection section, so that one end of the inner tube connection section far from the tapered section can be opened or contracted; the telescopic rod connecting member further includes an adapter sleeve for fixedly connecting the inner tube. The adapter sleeve is sleeved and axially limited on the inner tube connection section, and the adapter sleeve and the inner tube connection section are axially limited and matched with each other.
[0017] The present utility model also provides a telescopic rod, including an inner tube, an outer tube sleeved outside the inner tube, and the telescopic rod connecting member as described in any one of the above embodiments. The inner tube is fixedly connected to the inner guide rod of the telescopic rod connecting member, and the expansion sleeve of the telescopic rod connecting member is tightly installed in the outer tube.
[0018] The inner guide rod of the telescopic rod connector of the present utility model is rotatably arranged in the expansion sleeve around its axis. By providing a spiral groove on the expansion sleeve and arranging a positioning member on the inner guide rod that can be slidably installed in the spiral groove, the positioning member is matched with the spiral groove, so that the rotational movement of the inner guide rod relative to the expansion sleeve can be converted into an axial movement to switch the locking position and unlocking position of the expansion sleeve, enabling the expansion sleeve to be tightly connected or loosely fitted with the outer tube, and realizing the locking and unlocking of the inner tube and the outer tube; compared with the method of realizing axial movement through the cooperation of internal and external threads, the structure of the telescopic rod connector can be simplified, the number of parts can be reduced, and the processing cost can be effectively reduced. Brief Description of the Drawings
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0020] Figure 1 Shows a schematic structural diagram of an embodiment of the telescopic rod connector of the present utility model;
[0021] Figure 2 For Figure 1 A cross-sectional view of the telescopic rod connector at an angle in
[0022] Figure 3 Shows a schematic structural diagram of an embodiment of the inner guide rod of the present utility model;
[0023] Figure 4 Shows a schematic structural diagram of an embodiment of the expansion sleeve of the present utility model;
[0024] Figure 5 Shows a schematic structural diagram of an embodiment of the adapter sleeve of the present utility model;
[0025] Figure 6 Is a cross-sectional view of the telescopic rod connector of the telescopic rod of the present utility model in the unlocked position;
[0026] Figure 7 For Figure 6 A cross-sectional view of the telescopic rod connector of the telescopic rod in the locked position in
[0027] Explanation of the reference numerals in the drawings:
[0028] Label Name Label Name Label Name 100 Retractable rod connecting piece 115 Positioning groove 124 Notch groove 110 Expansion sleeve 116 Connection section 125 Fixed section 111 Spiral groove 120 Inner guide rod 126 Conical section 112 Positioning section 121 Positioning part 130 Adapter sleeve 113 Expansion section 122 Installation section 200 Inner tube 114 Free part 123 Inner tube connection section 300 Outer tube
[0029] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the drawings. Detailed Embodiments
[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions conflicts with each other or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0031] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then such directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, then the directional indications will also change accordingly.
[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time.
[0033] The present utility model provides a telescopic rod connecting piece for locking an inner tube and an outer tube.
[0034] In the embodiments of the present utility model, please refer to Figures 1 to 4 、 Figure 6 and Figure 7, the telescopic rod connector 100 is used to connect the inner tube 200 and the outer tube 300. Among them, the telescopic rod connector 100 includes a tightening sleeve 110 and an inner guide rod 120. The tightening sleeve 110 is used to be tightened inside the outer tube 300. The tightening sleeve 110 can be opened to increase its outer diameter or retracted to decrease its outer diameter. A spiral groove 111 is provided on the tightening sleeve 110. The inner guide rod 120 is used to connect the inner tube 200. The inner guide rod 120 is rotatably arranged inside the tightening sleeve 110 around its axis. The inner guide rod 120 is provided with a positioning member 121 corresponding to the spiral groove 111. The positioning member 121 can be slidably installed in the spiral groove 111 to drive the inner guide rod 120 to reciprocate relative to the tightening sleeve 110 along its axial direction between the locking position and the unlocking position when the inner guide rod 120 rotates; at the locking position, the tightening sleeve 110 is opened to tightly fit with the outer tube 300, and at the unlocking position, the tightening sleeve 110 can retract radially inside the outer tube 300 relative to the inner guide rod 120.
[0035] In this embodiment, for the convenience of description, the state after the telescopic rod connector 100 is connected to the inner tube 200 and the outer tube 300 is described herein. The tightening sleeve 110 can be opened or retracted through the inner guide rod 120 to achieve an increase or decrease in the outer diameter. There can be many structures and shapes of the tightening sleeve 110. For example, the tightening sleeve 110 can include a plurality of arc-shaped plates arranged at intervals in the circumferential direction, or the tightening sleeve 110 is integrally arranged in a serpentine structure around its circumference, as long as the tightening sleeve 110 can be relatively opened or retracted. The structure of the tightening sleeve 110 is not specifically limited herein.
[0036] Only one spiral groove 111 can be provided on the tightening sleeve 110, or multiple parallel spiral grooves 111 can be provided. Optionally, in order to reduce costs, only one spiral groove 111 is provided on the tightening sleeve 110. The length of the spiral groove 111 can be designed according to actual needs and is not specifically limited herein. The positioning member 121 can specifically be structures such as a positioning post or a positioning protrusion. The positioning member 121 can be slidably installed in the spiral groove 111. When the inner guide rod 120 rotates relative to the tightening sleeve 110, through the cooperation of the positioning member 121 and the spiral groove 111, the inner guide rod 120 can be driven to move axially relative to the tightening sleeve 110 simultaneously.
[0037] The outer tube 300 is sleeved outside the inner tube 200 and the telescopic rod connecting piece 100. The expansion sleeve 110 is used to expand and tighten inside the outer tube 300. That is, when the expansion sleeve 110 is not inserted into the outer tube 300 and the expansion sleeve 110 is in an open state, the outer diameter of the expansion sleeve 110 is slightly larger than the inner diameter of the outer tube 300. When it is necessary to insert the expansion sleeve 110 into the outer tube 300, by pinching the expansion sleeve 110, the outer diameter of the expansion sleeve 110 is reduced to be placed inside the outer tube 300. When the expansion sleeve 110 is placed in the outer tube 300, due to the action of tension, the outer peripheral wall of the expansion sleeve 110 fits with the outer peripheral wall of the outer tube 300. Thus, through the frictional force between the expansion sleeve 110 and the outer tube 300, the inner guide rod 120 can rotate relative to the expansion sleeve 110. Optionally, in order to increase the frictional force between the expansion sleeve 110 and the outer tube 300, the expansion sleeve 110 is made of an elastic material with a large frictional force such as silica gel or rubber.
[0038] In the locked position, the inner guide rod 120 rotates forward. Through the cooperation of the positioning member 121 and the spiral groove 111, the inner guide rod 120 moves forward relative to the expansion sleeve 110, further pushing against and expanding the expansion sleeve 110, so that the expansion sleeve 110 presses against the inner wall of the outer tube 300, and even the expansion sleeve 110 can be in interference fit with the outer tube 300. In this way, the expansion sleeve 110 and the outer tube 300 can be locked, and further the locking fit between the inner tube 200 and the outer tube 300 can be realized, avoiding the relative displacement of the inner tube 200 and the outer tube 300 in the axial direction. In the unlocked position, the inner guide rod 120 rotates reversely relative to the expansion sleeve 110, and the inner guide rod 120 moves reversely relative to the expansion sleeve 110, so that there is a gap between the outer peripheral wall of the inner guide rod 120 and the inner peripheral wall of the expansion sleeve 110. In this way, the expansion sleeve 110 can radially retract relative to the inner guide rod 120. Therefore, the outer tube 300 can axially move relative to the expansion sleeve 110, and further the axial movement of the inner tube 200 and the outer tube 300 can be realized, meeting the user's demand for adjusting the length of the telescopic rod.
[0039] The inner guide rod 120 of the telescopic rod connecting piece 100 of the present utility model is rotatably arranged inside the expansion sleeve 110 around its axis. By opening a spiral groove 111 on the expansion sleeve 110 and arranging a positioning member 121 on the inner guide rod 120 that can be slidably installed in the spiral groove 111, the cooperation between the positioning member 121 and the spiral groove 111 can convert the rotational movement of the inner guide rod 120 relative to the expansion sleeve 110 into an axial movement to switch the locked position and the unlocked position of the expansion sleeve 110, so that the expansion sleeve 110 is tightly connected or loosely fitted with the outer tube 300, and the locking and unlocking of the inner tube 200 and the outer tube 300 can be realized; compared with the method of realizing axial movement through the cooperation of internal and external threads, the structure of the telescopic rod connecting piece 100 can be simplified, the number of parts can be reduced, and the processing cost can be effectively reduced.
[0040] In an embodiment, such as Figure 1 、 Figure 4 、Figure 6 and Figure 7 As shown in FIG. 1 , the expansion sleeve 110 includes a positioning section 112 and an expansion section 113 connected along the axial direction of the inner guide rod 120. The positioning section 112 is provided with a spiral groove 111. The expansion section 113 includes at least two free portions 114 spaced apart in the circumferential direction of the inner guide rod 120. In the locking position, the multiple free portions 114 are relatively open, and in the unlocking position, the multiple free portions 114 are relatively contracted.
[0041] In this embodiment, the expansion sleeve 110 includes an expansion section 113 and a positioning section 112, and the expansion sleeve 110 is functionally segmented. Compared with the spiral groove 111 provided on the positioning section 112, the structural strength of the expansion sleeve 110 can be improved, the expansion surface can be increased, and the connection stability between the expansion sleeve 110 and the outer tube 300 can be improved. The free portion 114 can have many structures, such as an arc-shaped plate, or a "J"-shaped cantilever. The number of free portions 114 can also be selected and designed according to actual needs. In order to improve the connection stability between the expansion section 113 and the outer tube 300, optionally, the free portion 114 is an arc-shaped plate, and the expansion section 113 includes two opposite arc-shaped plates spaced on both sides. When the inner guide rod 120 moves to the locking position, the multiple free parts 114 of the expansion sleeve 110 are stretched open, so that the inner diameter of the expansion section 113 increases. In this way, the inner guide rod 120 can push the multiple free parts 114 of the expansion sleeve 110 outward, so that the expansion section 113 and the outer tube 300 are tightly matched, so that the outer tube 300 and the inner tube 200 are relatively locked. When the inner guide rod 120 moves to the unlocking position, the multiple free parts 114 can be radially retracted. In this way, the expansion section 113 and the outer tube 300 are loosely matched, so that the outer tube 300 can move axially relative to the inner tube 200 to meet the user's telescopic rod length adjustment needs.
[0042] Furthermore, the free ends of the multiple free portions 114 are located at one end of the expansion section 113 away from the positioning section 112. In this way, the free ends of the multiple free portions 114 are located at the tail end of the entire telescopic rod connector 100. The inner guide rod 120 moves forward to tighten and expand the multiple free portions 114, and moves backward to loosen the multiple free portions 114, so that the multiple free portions 114 can retract radially inward. Compared with making the free ends of the free portions 114 located at other positions, the overall structure can be simplified and manufacturing can be facilitated. In other embodiments, the free ends of the multiple free portions 114 can also be located at one end of the expansion section 113 close to the positioning section 112.
[0043] In one embodiment, please refer to Figure 1 and Figure 4 , wherein the gap between the two free portions 114 is connected to the starting end of the spiral groove 111, and the positioning member 121 can escape from the expansion sleeve 110 through the gap between the two free portions 114.
[0044] In this embodiment, by making the gap between the two free portions 114 communicate with the starting end of the spiral groove 111, the gap between the two free portions 114 is fully utilized. In this way, the positioning post of the inner guide rod 120 can be installed into the spiral groove 111 from the gap between the two free portions 114, or separated from the expansion sleeve 110, which can simplify the assembly steps of the expansion sleeve 110 and the inner guide rod 120 and reduce the assembly difficulty between the two.
[0045] In one embodiment, as Figures 1 to 4 shown, the positioning member 121 is a positioning post, and a positioning groove 115 communicating with the end of the spiral groove 111 is further formed on the expansion sleeve 110. The inner side wall of the positioning groove 115 is arranged at an angle with the inner side wall of the spiral groove 111, and the positioning post is adaptively embedded in the positioning groove 115.
[0046] In this embodiment, the cross-section of the positioning post is circular, so that the positioning member 121 is a positioning post, which can ensure the smooth movement of the positioning member 121 in the spiral groove 111. By arranging the positioning groove 115 at the end of the spiral groove 111, the inner side wall of the positioning groove 115 is arranged at an angle with the inner side wall of the spiral groove 111. In this way, when the inner guide rod 120 rotates one circle in the expansion sleeve 110, the positioning post moves to be engaged with the positioning groove 115, which can effectively prevent the positioning post from automatically moving in the spiral groove 111, resulting in the loosening of the expansion sleeve 110 and the outer tube 300. When it is necessary to loosen the expansion sleeve 110, only by rotating the inner guide rod 120 in the reverse direction, the positioning post can be moved from the positioning groove 115 to the spiral groove 111.
[0047] In one embodiment, please refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 6 and Figure 7 , the expansion sleeve 110 further includes a connecting section 116 connected between the positioning section 112 and the expansion section 113, and the thickness of the connecting section 116 is smaller than the thicknesses of the positioning section 112 and the expansion section 113.
[0048] In this embodiment, making the thickness of the connecting section 116 smaller than the thicknesses of the positioning section 112 and the expansion section 113 can make the deformation degree of the expansion section 113 relative to the positioning section 112 larger and the deformation difficulty smaller. In other words, the force required to open the multiple free ends of the expansion section 113 is smaller, and the opening degree of the multiple free ends is larger under the same applied force. Specifically, the outer peripheral wall of the expansion section 113 is recessed around its circumference to form a mounting section 122. That is, the outer peripheral wall of the connecting section 116 forms an annular groove.
[0049] In one embodiment, as Figures 1 to 3 、 Figure 6 and Figure 7As shown, the inner guide rod 120 includes a tapered section 126, and the outer diameter of the tapered section 126 gradually increases from the positioning section 112 to the expansion section 113. The tapered section 126 is at least correspondingly adapted to the expansion section 113.
[0050] In this embodiment, the inner guide rod 120 can be set as a tapered tube, or a part of the inner guide rod 120 can be set as the tapered section 126. It can be understood that the expansion section 113 is also set in a gradually expanding shape adapted to the tapered section 126. By making the inner guide rod 120 include the tapered section 126 and making the outer diameter of the tapered section 126 gradually increase from the positioning section 112 to the expansion section 113, in this way, when the inner guide rod 120 moves towards the positioning section 112 side, the tapered section 126 gradually expands outwards and presses against the expansion section 113, so that the plurality of free parts 114 open and press against the outer tube 300 to achieve a tight fit between the two. When the inner guide rod 120 moves towards the tapered section 126 side, the tapered section 126 gradually relaxes the expansion section 113, so that the plurality of free parts 114 can retract, and it is in a loose fit with the outer tube 300, so that the outer tube 300 can axially move relative to the expansion tube. Making the inner guide rod 120 provided with the tapered section 126 to press and expand the expansion section 113 is simple, easy to implement and low in cost compared with other methods.
[0051] In one embodiment, please refer to Figures 1 to 3 , the inner guide rod 120 further includes a mounting section 122 connected to the side of the tapered section 126 close to the positioning section 112. The positioning member 121 is arranged on the mounting section 122. The outer diameter of the mounting section 122 is smaller than the outer diameter of the tapered section 126. The expansion sleeve 110 can be sleeved on the tapered section 126 via the mounting section 122.
[0052] In this embodiment, the positioning section 112 of the expansion sleeve 110 is sleeved on the mounting section 122, and the expansion section 113 of the expansion section 113 is sleeved on the tapered section 126. By making the outer diameter of the mounting section 122 smaller than the outer diameter of the tapered section 126, the expansion sleeve 110 can be sleeved on the inner guide rod 120 from the side of the mounting section 122, and the expansion sleeve 110 is sleeved outside the tapered section 126, which can simplify the assembly of the two and improve the assembly efficiency.
[0053] In one embodiment, as Figures 1 to 5As shown, the installation section 122 includes an inner tube connection section 123 and a fixed section 125. The fixed section 125 is connected between the inner tube connection section 123 and the tapered section 126. The positioning section 112 is sleeved outside the fixed section 125. The end face of the inner tube connection section 123 away from the tapered section 126 is provided with at least two notch grooves 124. The at least two notch grooves 124 are circumferentially spaced on the inner tube connection section 123, so that one end of the inner tube connection section 123 away from the tapered section 126 can be opened or contracted. The telescopic rod connecting member 100 further includes an adapter sleeve 130 for fixedly connecting the inner tube 200. The adapter sleeve 130 is sleeved and axially limitedly installed on the inner tube connection section 123, and the adapter sleeve 130 and the inner tube connection section 123 are axially limitedly matched with each other around their axes.
[0054] In this embodiment, a positioning member 121 is provided on the fixed section 125. When the positioning section 112 of the expansion sleeve 110 is sleeved on the fixed section 125 of the inner guide rod 120, the positioning member 121 on the fixed section 125 penetrates through the spiral groove 111. There are many ways to fixedly connect the adapter sleeve 130 and the inner tube connection section 123. For example, a plurality of circumferentially spaced ridges are provided on the outer peripheral wall of the inner tube connection section 123, so that the inner peripheral wall of the adapter sleeve 130 is provided in a serrated groove shape, so that the ridges and the serrated grooves cooperate to realize the fixed connection between the two. The adapter sleeve 130 is used to connect the inner tube 200, and the inner tube 200 can be specifically fixedly connected to the outside of the adapter sleeve 130 by riveting, welding and other methods. Specifically, an annular groove can be opened on the outer peripheral wall of the inner tube connection section 123 to be adapted to the adapter sleeve 130. By providing at least two notch grooves 124 on the inner tube connection section 123, the free end shell of the inner tube connection section 123 can be opened or contracted. When the adapter sleeve 130 is installed on the inner tube connection section 123, both ends of the adapter sleeve 130 abut against the two side walls of the annular groove to limit the axial displacement of the adapter sleeve 130 and the inner tube connection section 123. In this way, when the entire telescopic rod connecting member 100 is assembled, first, the expansion sleeve 110 is sleeved on the inner guide rod 120 from the installation section 122, and then the adapter sleeve 130 is axially limitedly installed on the connection section 116 to prevent the expansion sleeve 110 from coming off. The overall assembly is simple and fast, and the assembly efficiency can be effectively improved.
[0055] The present utility model also proposes a telescopic rod. Please refer to Figure 6 and Figure 7, the telescopic rod includes an inner tube 200, an outer tube 300 sleeved around the outer periphery of the inner tube 200, and a telescopic rod connector 100. The inner tube 200 is fixedly connected to the inner guide rod 120 of the telescopic rod connector 100. The expansion sleeve 110 of the telescopic rod connector 100 is tightly installed in the outer tube 300. The specific structure of the telescopic rod connector 100 refers to the above-mentioned embodiments. Since this telescopic rod adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated one by one here. The inner tube 200 and the inner guide rod 120 can be fixedly connected by riveting, welding or other means. The outer tube 300 is sleeved around the outer periphery of the expansion sleeve 110, and the outer peripheral wall of the expansion sleeve 110 is in frictional contact with the inner wall surface of the outer tube 300, so that the inner tube 200 can drive the inner guide rod 120 to rotate relative to the expansion sleeve 110.
[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A telescopic rod connector for connecting an inner tube and an outer tube, characterized in that: The telescopic rod connecting piece comprises: An expansion sleeve, used to connect the outer tube, the expansion sleeve can be expanded to increase its outer diameter or retracted to reduce its outer diameter, and the expansion sleeve is provided with a spiral groove; and An inner guide rod is used to connect the inner tube. The inner guide rod can be rotatably arranged around its axis in the expansion sleeve. The inner guide rod is provided with a positioning piece corresponding to the spiral groove. The positioning piece can be slidably installed in the spiral groove to drive the inner guide rod to reciprocate between a locking position and an unlocking position along its axial direction relative to the expansion sleeve when the inner guide rod rotates; in the locking position, the expansion sleeve is opened to tightly fit the outer tube, and in the unlocking position, the expansion sleeve can be radially retracted in the outer tube relative to the inner guide rod.
2. The telescopic rod connector according to claim 1, characterized in that: The expansion sleeve includes a positioning section and an expansion section connected along the axial direction of the inner guide rod, the positioning section is provided with the spiral groove, and the expansion section includes at least two free portions spaced apart in the circumferential direction of the inner guide rod; in the locking position, the multiple free portions are relatively open, and in the unlocking position, the multiple free portions can be relatively contracted.
3. The telescopic rod connector according to claim 2, characterized in that: The free ends of the plurality of free portions are located at an end of the expansion section away from the positioning section.
4. The telescopic rod connector according to claim 3, characterized in that: The gap between the two free parts is communicated with the starting end of the spiral groove, and the positioning member can escape from the expansion sleeve through the gap between the two free parts.
5. The telescopic rod connector according to claim 4, characterized in that: The positioning member is a positioning column, and the expansion sleeve is also provided with a positioning groove connected to the end of the spiral groove. The inner side wall of the positioning groove is arranged at an angle with the inner side wall of the spiral groove, and the positioning column is adapted to be embedded in the positioning groove.
6. The telescopic rod connector according to claim 2, characterized in that: The expansion sleeve further includes a connecting section connected between the positioning section and the expansion section, and a thickness of the connecting section is smaller than a thickness of the positioning section and the expansion section.
7. The telescopic rod connecting piece according to any one of claims 2 to 6, characterized in that: The inner guide rod comprises a tapered section, the outer diameter of which gradually increases from the positioning section to the expansion section, and the tapered section is at least arranged to correspond to and adapt to the expansion section.
8. The telescopic rod connecting piece according to claim 7, characterized in that: The inner guide rod also includes a mounting section connected to the tapered section near the positioning section. The positioning member is arranged on the mounting section. The outer diameter of the mounting section is smaller than the outer diameter of the tapered section. The expansion sleeve can be sleeved on the outside of the tapered section through the mounting section.
9. The telescopic rod connecting piece according to claim 8, characterized in that: The mounting section comprises an inner tube connecting section and a fixing section, wherein the fixing section is connected between the inner tube connecting section and the tapered section; the positioning section is sleeved outside the fixing section; at least two notched grooves are provided on the end surface of the inner tube connecting section away from the tapered section, and the at least two notched grooves are arranged at circumferential intervals of the inner tube connecting section so that the end of the inner tube connecting section away from the tapered section can be opened or contracted; the telescopic rod connecting piece also comprises an adapter sleeve for fixedly connecting the inner tube, the adapter sleeve is sleeved and installed on the inner tube connecting section along its axial limit, and the adapter sleeve cooperates with the inner tube connecting section around its axial limit.
10. A telescopic rod, characterized in that: It comprises an inner tube, an outer tube sleeved on the outer periphery of the inner tube and a telescopic rod connecting piece as described in any one of claims 1 to 9, wherein the inner tube is fixedly connected to an inner guide rod of the telescopic rod connecting piece, and the expansion sleeve of the telescopic rod connecting piece is expansion-tightened and installed in the outer tube.