Novel telescopic rod

Abstract

The utility model belongs to the technical field of telescopic rods, and particularly relates to a novel telescopic rod which is formed by movably connecting an inner pipe and an outer pipe in a sleeved mode, the interior of the outer pipe is communicated, the inner pipe can be pulled out or retracted in the outer pipe, one end of the outer pipe is provided with a first inward wrapping edge, the minimum inner diameter of the first wrapping edge is smaller than the inner diameter of the outer pipe, and one end of the inner pipe extends to form a connecting part. One end of the connecting part penetrates through the outer pipe and is clamped with the outer pipe, the connecting part is provided with a dot bulge which protrudes outwards, a convex ring which is formed by extruding outwards is arranged at the joint of the connecting part and the inner pipe, and the inner diameter of the convex ring is larger than the minimum inner diameter of the covered edge I. Compared with the prior art, the stability between the inner pipe and the outer pipe is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of telescopic rods, and more specifically, to a novel telescopic rod. Background Art

[0002] At present, telescopic rods are widely used in various products, including selfie sticks, telescopic clothes drying rods, telescopic umbrella handles, fishing rods, mops, telescopic electric fans, etc. The telescopic rod is retractable, easy to store and carry. It can be extended when working to reach the required length to meet the use requirements. It can be folded when not working to save space and is easy to carry and store.

[0003] For example, the authorization announcement number CN 214092616 U discloses a telescopic rod, which includes an outer tube and an inner tube, wherein the inner tube is slidably arranged inside the outer tube; and a positioning member is arranged between the inner tube and the outer tube, wherein the inner wall of the positioning member is in contact with the outer wall of the inner tube; wherein the positioning member includes a first positioning piece and a second positioning piece, wherein the outer wall of the first positioning piece is in contact with the inner wall of the outer tube, and the second positioning piece is provided with an arc-shaped drum surface, which abuts against the inner wall of the outer tube.

[0004] In the above, a positioning piece is attached between the inner tube and the outer tube of the telescopic rod, and the telescopic rod is extended and retracted by the positioning piece, but it is easy to become loose after long-term use, resulting in poor stability between the inner tube and the outer tube and high cost. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a novel telescopic rod which improves the stability between the inner tube and the outer tube and has low cost.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A novel telescopic rod is formed by an inner tube and an outer tube movably connected. The outer tube is connected internally, and the inner tube can be pulled out or retracted in the outer tube. One end of the outer tube is provided with an inwardly directed edge 1, and the minimum inner diameter of the edge 1 is smaller than the inner diameter of the outer tube. A connecting portion extends from one end of the inner tube, and the other end is provided with an edge 2. The connecting portion is provided with an outwardly protruding dot protrusion, and a convex ring extruded outward is provided at the connection between the connecting portion and the inner tube. The convex ring is placed in the outer tube, and the inner tube is provided with an edge at two ends passing through the outer tube, and the convex ring is clamped in the outer tube and contacts the edge 1.

[0008] The utility model is further configured as follows: the number of the dot protrusions is at least two.

[0009] The utility model is further configured such that: the top of the dot protrusion contacts with the inner wall of the outer tube.

[0010] The utility model is further configured as follows: the maximum inner diameter of the convex ring is greater than the minimum inner diameter of the edging.

[0011] By adopting the above technical solution, the beneficial effects of the utility model are:

[0012] The inner tube is inserted into the outer tube, and the convex ring on the connecting part of the inner tube is stuck in the outer tube. The edging on the outer tube is used to limit the inner tube from detaching. The raised dot protrusions are directly set so that the dot protrusions directly contact the outer wall and rub against the inner wall. No additional auxiliary parts, such as clamping rings or positioning parts, are required for internal positioning friction. This ensures that when the traditional clamping rings or positioning parts are used for expansion and contraction, the clamping effect is replaced by that of the traditional clamping rings or positioning parts, so as to achieve stability and connection, and reduce additional material cost expenditure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an exploded view of an embodiment of the utility model.

[0014] Inner tube 1, outer tube 2, edging one 3, connecting part 4, dot protrusion 5, protruding ring 6, edging two 7. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0017] like Figure 1 As shown, the novel telescopic rod is formed by an inner tube 1 and an outer tube 2 being movably connected, the outer tube 2 is connected inside, the inner tube 1 can be pulled out or retracted in the outer tube 2, one end of the outer tube 2 is provided with an inwardly facing edge 3, the minimum inner diameter of the edge 3 is smaller than the inner diameter of the outer tube 2, a connecting portion 4 is extended from one end of the inner tube 1, and an edge 7 is provided at the other end.

[0018] The connecting portion 4 is provided with a dot protrusion 5 that bulges outward, and the connecting portion 4 and the inner tube 1 are connected with a convex ring 6 that is extruded outward. The convex ring 6 is placed in the outer tube 2. The inner tube 1 is provided with a rim 7 that passes through the outer tube 2, and the convex ring 6 is stuck in the outer tube 2 and contacts the rim 3.

[0019] A convex ring 6 formed by extrusion is installed at the connection between the connecting portion 4 and the inner tube 1. The inner diameter of the convex ring 6 is larger than the minimum inner diameter of the edge 3, and the maximum inner diameter of the convex ring 6 is larger than the minimum inner diameter of the edge 3.

[0020] Working principle: the inner tube 1 is inserted into the outer tube 2, and the convex ring 6 on the connecting part 4 of the inner tube 1 is stuck in the outer tube 2. The edging 3 on the outer tube 2 plays a limiting role, so that the inner tube 1 will not be separated, and the raised dot protrusions 5 are directly set so that the dot protrusions 5 directly contact the outer and inner walls for friction, and no additional auxiliary parts, such as clamping rings or positioning parts, are required for internal positioning friction, thereby ensuring that when it expands and contracts, it replaces the clamping effect of traditional clamping rings or positioning parts, achieves stability and connection, and reduces additional material cost expenditure.

[0021] Through the cooperation of the outer tube 2 and the inner tube 1, the edge 3 at one end of the outer tube 2 is used, and the minimum inner diameter of the edge 3 is smaller than the maximum inner diameter of the convex ring 6 on the inner tube 1, so that when they cooperate, the inner tube 1 can be stuck in a section extending outside the outer tube 2, and the connecting part 4 of the inner tube 1 is stuck inside the outer tube 2 to achieve the limiting effect, and at least two dot protrusions 5 are provided on the outer wall of the connecting part 4, and the dot protrusions 5 are used to achieve the interference cooperation between the inner tube 1 and the outer tube 2. When the inner tube 1 and the outer tube 2 complete the expansion and contraction work, the dot protrusions 5 play a good internal friction effect, so that they can be limited after stretching.

[0022] Furthermore, the top end surface of the original dot protrusion 5 can be set as a flat end surface. The design of the flat end surface can increase the contact area, changing the original single point to a two-line contact, thereby increasing the stability of the positioning after actual stretching.

[0023] The number of telescopic sections of the telescopic rod is not limited to the two-section telescopic style of the present application, and a greater number of telescopic sections can be achieved for use. It only needs to add a number of inner tubes 1 of different sizes, movably socketed from small to large, and then cover an outer tube 2 to achieve internal multi-section telescopic.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any common changes and substitutions made by those skilled in the art within the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A new telescopic rod, characterized in that: The inner tube (1) and the outer tube (2) are movably connected, the outer tube (2) is connected internally, and the inner tube (1) can be pulled out or retracted in the outer tube (2). One end of the outer tube (2) is provided with an inwardly directed edge wrapping (3), the minimum inner diameter of the edge wrapping (3) being smaller than the inner diameter of the outer tube (2). A connecting portion (4) extends from one end of the inner tube (1), and a second edge wrapping portion (7) is provided at the other end. The connecting portion (4) is provided with a dot protrusion (5) protruding outwards, and a convex ring (6) extruded outwards is provided at the connection between the connecting portion (4) and the inner tube (1). The convex ring (6) is placed in the outer tube (2). The inner tube (1) is provided with two ends of the edging (7) passing through the outer tube (2), and the convex ring (6) is stuck in the outer tube (2) and contacts the edging (3).

2. A novel telescopic rod according to claim 1, characterized in that: The number of the dot protrusions (5) is at least two.

3. A novel telescopic rod according to claim 2, characterized in that: The top of the dot protrusion (5) contacts the inner wall of the outer tube (2).

4. A novel telescopic rod according to claim 3, characterized in that: The maximum inner diameter of the convex ring (6) is greater than the minimum inner diameter of the edge wrap (3).

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