Waterproof screw locking device

Abstract

To provide a screw-type locking device which eliminates the waterproof defect of the locking device, maintains a classic locking structure, achieves both waterproofness and structural stability, and is applicable to various connection scenes using telescopic rods. [Solution] A waterproof screw-type locking device includes a lock nut (10) and a jacket (20). The jacket consists of an integrally connected conical-tube clamping portion (201), a male threaded portion (202), and a straight tube portion (203). The conical-tube clamping portion is a conical sleeve structure with a continuous circumferential wall and is used to clamp the inner rod of a telescopic rod. The lock nut is fitted onto its outside and threaded onto the male threaded portion. The straight tube portion is fitted onto the outside of the outer rod of the telescopic rod and extends downward along the axis for a certain distance to cover a portion of the upper end of the outer rod, forming a waterproof portion. The device uses a circumferentially continuous conical-tube clamping portion to eliminate notches and block the infiltration path of water and water vapor, and utilizes the extension of the straight tube portion to effectively block rainwater.

Description

[Technical Field]

[0001] The present invention relates to the technical field of locking devices, and more particularly to a screw-type locking device with waterproof function. [Background technology]

[0002] In the field of telescopic rods, screw-type locking devices are widely used due to their advantages of simple structure and ease of operation. As shown in Figure 1, a conventional screw-type locking device generally consists of a lock nut 1 and a jacket 2, and the lock nut 1 is tightened on the outside of the jacket 2 to connect and fix the inner rod 30 and outer rod 40 of the telescopic rod. To ensure smooth insertion of the inner rod 30 into the jacket 2, conventional jackets 2 generally have notches 21 formed therein. A plurality of notches 21 are distributed at intervals around the circumferential direction of the jacket 2, and each notch groove 21 extends a certain distance along the axial direction of the jacket 2.

[0003] However, conventional screw-type locking devices have obvious deficiencies in terms of waterproofing during actual use. On the one hand, the notch groove 21 on the jacket 2 provides the elastic deformation space necessary to ensure the clamping effect, but because it is a non-sealed structure, external water, water vapor, etc. can easily seep directly into the locking device through the notch groove 21 and even enter between the inner rod 30 and outer rod 40 of the telescopic rod. On the other hand, the conventional jacket 2 also does not take waterproofing into consideration, so it cannot effectively block rainwater and cannot prevent corrosion inside the telescopic rod. Therefore, there is an urgent need for a screw-type locking device with waterproofing functions. Summary of the Invention [Problem to be solved by the invention]

[0004] Regarding the shortcomings of the prior art, the present invention provides a screw locking device with waterproof function. [Means for solving the problem]

[0005] The present invention discloses a waterproof screw-type locking device, which includes a lock nut and a jacket, and the jacket is composed of a conical cylindrical clamping part, a male thread part, and a straight cylindrical part that are integrally connected; The conical tube clamping part has a conical sleeve structure with a continuous circumferential wall, and is used to clamp the inner rod of the telescopic rod. The lock nut is fitted onto the outer surface of the conical tube clamping part and is screwed onto the male threaded part. The straight cylindrical portion is used to fit onto the outside of the outer rod of the telescopic rod, and extends downward along its axial direction by a certain distance to cover part of the upper end of the outer rod and form a waterproof portion.

[0006] In a further improvement of the present invention, the lock nut has a plurality of ribs or grooves formed around its outer surface along its axial direction.

[0007] As a further improvement of the present invention, a plurality of ribs or grooves are provided around the outer surface of the cylindrical portion along the axial direction thereof.

[0008] As a further improvement of the present invention, the inner diameter of the conical cylindrical clamping portion and the male threaded portion is smaller than the inner diameter of the straight cylindrical portion.

[0009] In a further improvement of the present invention, the length of the conical clamping portion is 25±5 mm.

[0010] In a further refinement of the present invention, the length of the male thread is 20±5 mm.

[0011] In a further refinement of the present invention, the length of the straight cylindrical portion is 40±5 mm. [Effects of the Invention]

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] The present invention has a simple structure and is easy to operate. The lower end of the jacket of the screw-type locking device is fitted onto the outside of the connection between the jacket and the outer rod, and a waterproof part is installed that extends downward a certain distance to cover part of the upper end of the outer rod, thereby effectively blocking external rainwater and reducing the direct intrusion of rainwater into the connection area between the locking device and the outer rod, thereby reducing the risk of corrosion caused by water entering the inside of the telescopic rod.

[0014] This device eliminates the notch groove at the top of the jacket found in conventional designs and instead creates a conical sleeve structure with a continuous circumferential cylindrical wall. This completely prevents water and steam from seeping into the locking device and into the passage between the inner and outer rods through the notch groove, eliminating the risk of water leakage due to a non-sealed structure. This further improves the waterproof performance of the screw-type locking device while maintaining the classic locking structure, achieving both waterproofness and structural stability, and is suitable for connecting various telescopic rods. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a structural schematic diagram of a screw-type locking device of the prior art; [Figure 2] 1 is a structural schematic diagram of a waterproof screw locking device disclosed in one embodiment of the present invention; [Figure 3] 1 is an exploded view of the structure of a waterproof screw locking device disclosed in one embodiment of the present invention; FIG. [Figure 4] 1 is a schematic diagram illustrating a state in which a waterproof screw locking device according to one embodiment of the present invention is used; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] In order to clarify the objectives, technical solutions and advantages of the embodiments of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention, and it should be obvious that the described embodiments are only some embodiments of the present invention, not all embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without any creative efforts are all within the scope of protection of the present invention.

[0017] In describing the present invention, the orientations or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are orientations or positional relationships shown based on the drawings, and are merely for the purpose of simplifying the description and illustration of the present invention, and are not to be understood as limiting the present invention, nor do they indicate or suggest that the devices or elements shown must have a particular orientation or be constructed and operated in a particular orientation. Furthermore, the terms "first," "second," and "third" are merely for the purpose of explanation, and should not be understood as indicating or suggesting relative importance.

[0018] It should be further explained that in the description of the present invention, unless otherwise clearly specified and limited, the terms "attached," "coupled," and "connected" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or internal communication between two elements. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0019] The present invention will be described in more detail below in conjunction with the drawings.

[0020] As shown in Figures 2 to 4, the present invention provides a waterproof screw-type locking device, which includes a lock nut 10 and a jacket 20. The jacket 20 is composed of an integrally connected tapered-tube clamping portion 201, an externally threaded portion 202, and a straight-tube portion 203. The tapered-tube clamping portion 201 is a conical sleeve structure with a continuous circumferential cylindrical wall, which is used to clamp the inner rod 30 of the telescopic rod. The lock nut 10 is fitted onto the outside of the tapered-tube clamping portion 201 and threadedly engages with the externally threaded portion 202. The straight-tube portion 203 is used to fit onto the outside of the outer rod 40 of the telescopic rod. The straight-tube portion 203 extends downward along its axial direction by a certain distance to cover part of the upper end of the outer rod 40, forming a waterproof portion.

[0021] Specifically, as shown in FIG. 3, in the above embodiment, preferably, a plurality of ribs or grooves are provided around the outer surface of the lock nut 10 along its axial direction.

[0022] In the above embodiment, preferably, a plurality of ribs or grooves are provided around the outer surface of the straight cylindrical portion 203 along its axial direction.

[0023] In the above embodiment, the inner diameters of the conical cylindrical clamping portion 201 and the male thread portion 202 are preferably smaller than the inner diameter of the straight cylindrical portion 203 .

[0024] In the above embodiment, preferably, the length of the conical cylindrical clamping portion 201 is 25±5 mm, the length of the male thread portion 202 is 20±5 mm, and the length of the straight cylindrical portion 203 is 40±5 mm.

[0025] As shown in FIG. 4 , in the above embodiment, preferably, in actual use, the inner rod 30 is inserted from top to bottom into the conical tube clamping portion 201 and the male thread portion 202. When the lock nut 10 is rotated upward, the conical tube clamping portion 201 loosens its clamping grip on the inner rod 30. At this time, the height of the inner rod 30 can be adjusted up and down. After the height of the inner rod 30 is adjusted to a certain level, the lock nut 10 is rotated downward. At this time, the conical tube clamping portion 201 clamps the inner rod 30 to secure it in place. At the same time, the outer rod 40 is inserted from bottom to top into the straight tube portion 203. The straight tube portion 203 covers part of the upper end of the outer rod 40, forming a waterproof portion.

[0026] The advantages of the present invention are as follows:

[0027] The present invention has a simple structure and is easy to operate. The lower end of the jacket 20 of the screw-type locking device is fitted onto the outside of the connection between the jacket 20 and the outer rod 40, and a waterproof part is installed that extends downward a certain distance and covers part of the upper end of the outer rod 40, thereby effectively blocking external rainwater and reducing the direct intrusion of rainwater into the connection area between the locking device and the outer rod 40, thereby reducing the risk of corrosion caused by water entering the inside of the telescopic rod.

[0028] This invention eliminates the notch groove at the top end of the jacket 20 found in conventional designs and instead designs a conical sleeve structure with a continuous circumferential cylindrical wall. This completely prevents water and steam from seeping into the locking device and the passage between the inner rod 30 and outer rod 40 through the notch groove, eliminating the risk of water leakage due to a non-sealed structure. This further improves the waterproof performance of the screw-type locking device while maintaining the classic locking structure, achieving both waterproofness and structural stability, and making it suitable for connecting various telescopic rods.

[0029] The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Those skilled in the art can make various modifications and changes to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall fall within the protection scope of the present invention. [Explanation of symbols]

[0030] Prior art: 1, lock nut, 2, jacket, 21, notch groove, This idea: 10, lock nut, 20, jacket, 201, conical tube clamping portion, 202, male thread portion, 203, straight tube portion, 30, inner rod, 40, outer rod.

Claims

1. A waterproof screw-type locking device including a lock nut (10) and a jacket (20), wherein the jacket (20) is composed of a conical cylindrical clamping portion (201), a male thread portion (202), and a straight cylindrical portion (203) that are integrally connected; The conical tube clamping portion (201) has a conical sleeve structure with a continuous cylindrical wall in the circumferential direction, and is used to clamp the inner rod (30) of the telescopic rod. The lock nut (10) is fitted onto the outside of the conical tube clamping portion (201) and is screwed onto the male thread portion (202). The straight cylindrical portion (203) is used to be fitted onto the outside of the outer rod (40) of the telescopic rod, and the straight cylindrical portion (203) extends downward along its axial direction by a certain distance to cover a part of the upper end of the outer rod (40), thereby forming a waterproof portion.

2. 2. The screw-type locking device according to claim 1, wherein a plurality of ribs or grooves are provided around the outer surface of the lock nut (10) along the axial direction.

3. 2. The screw-type locking device according to claim 1, wherein a plurality of ribs or grooves are provided around the outer surface of the straight cylindrical portion (203) along the axial direction.

4. The screw-type locking device according to claim 1, wherein the inner diameters of the conical cylindrical clamping portion (201) and the male thread portion (202) are smaller than the inner diameter of the straight cylindrical portion (203).

5. The screw locking device according to claim 1, wherein the length of the conical clamping portion (201) is 25±5 mm.

6. 2. The screw locking device according to claim 1, wherein the length of the male threaded portion (202) is 20±5 mm.

7. 2. The screw locking device according to claim 1, wherein the length of the straight cylindrical portion (203) is 40±5 mm.

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