Locking mechanism between adjacent pipe sections of dust collector pipe

Abstract

The utility model discloses a locking mechanism between adjacent pipe sections of a dust collector pipe. The locking mechanism comprises a release key and a locking notch, wherein the release key is mounted on a first pipe section in a lifting manner; the locking notch is constructed and arranged on a second pipe section; rotating shafts are arranged on two sides corresponding to the middle of the release button, a clamping hook is arranged at the rear end of the release button, and a spring is arranged at the front end of the release button; the locking notch is provided with a locking part, and the clamping hook is provided with a self-locking inclined surface; a vertical plane is arranged at the position corresponding to the release key, the intersection point of the central axis of the rotating shaft and the vertical plane is a rotating point, the position, making contact with the locking part, of the self-locking inclined face on the vertical plane is a stress point, the self-locking inclined face on the vertical plane is a self-locking inclined line, and the connecting line of the rotating point and the stress point is a first connecting line. A line, perpendicular to the self-locking oblique line, of the rotating point is a second connecting line, and an intersection point is a self-locking point; according to the locking mechanism, a self-locking point is located below a stress point, the included angle formed by a first connecting line and a second connecting line is 5-20 degrees, and the angle of a self-locking oblique line is 60-80 degrees.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum cleaner pipe equipment, and particularly relates to a locking mechanism between adjacent pipe segments of a vacuum cleaner pipe. Background Art

[0002] A vacuum cleaner is a commonly used cleaning appliance for removing dust on the ground, carpets, walls, furniture, clothes and various gaps. Generally, a vacuum cleaner includes a relatively long suction pipe. However, as a rigid member, the suction pipe is difficult to bend. When cleaning relatively low places such as under the bed and under the table, the suction pipe cannot directly reach into the bottom area for cleaning, and people need to bend down or squat down to extend the floor brush into the bottom, which increases the physical consumption and labor intensity of the human body. Especially for some people with inconvenient lumbar spines or the elderly, the cleaning is very difficult. Moreover, when cleaning under the bed and under the table, the suction pipe is extremely easy to collide with objects, damaging the edges of the objects, affecting the beauty and scratching the outer wall of the suction pipe; when cleaning high places that are difficult to reach such as door frames and cabinet tops, it is even more difficult for the suction pipe to bend to suck dust at high positions, bringing great inconvenience to daily cleaning.

[0003] In view of the above problems, an improved solution was proposed in a Chinese patent, a bidirectionally bendable conductive suction pipe (CN212521649U). Although the improved solution of this patent solves the problem that the existing suction pipe is difficult to bend to adapt to different working environments; the upper surfaces between adjacent pipe segments of the existing vacuum cleaner pipe are connected by a snap connection through a locking mechanism composed of a release button and a locking notch, and the lower surfaces between the two are rotationally matched through a rotating mechanism; however, during the use of this type of vacuum cleaner pipe, it will inevitably be stressed, resulting in a tendency for the adjacent pipe segments to rotate around the rotating mechanism, which is likely to cause the release button of the locking mechanism to become unhooked, causing the pipe segments to separate and affecting the use of the vacuum cleaner pipe, and there is room for improvement. Summary of the Utility Model

[0004] The utility model aims to overcome the above defects in the prior art and provides a locking mechanism between adjacent pipe segments of a vacuum cleaner pipe. By constructing the self-locking point below the stress point and the angles of the self-locking angle and the inclination angle of the self-locking inclined plane, the locking effect and strength of the locking mechanism are effectively guaranteed, and the stability and reliability of the vacuum cleaner pipe are ensured.

[0005] To achieve the above object, the utility model provides a locking mechanism between adjacent pipe segments of a vacuum cleaner pipe, which is arranged between the rear end of the first pipe segment and the front end of the second pipe segment for locking between the two, and includes a release button that can be pivoted and installed on the first pipe segment, and a locking notch that is constructed and arranged on the second pipe segment;

[0006] It is characterized in that rotating shafts are symmetrically arranged on both sides of the middle part of the release button so that the release button can rotate around the central axis of the rotating shaft. A hook is arranged at the rear end of the release button and a spring is arranged at the front end thereof. The spring makes the front end of the release button always have a tendency to tilt upward;

[0007] The locking notch has a locking part that cooperates with the hook, and the hook has a self-locking inclined surface that cooperates with the locking part;

[0008] A vertical plane is made along the extension axis direction of the vacuum cleaner tube corresponding to the release button. The intersection point of the central axis of the rotating shaft and the vertical plane is the rotation point. The point or surface where the self-locking inclined surface contacts the locking part is represented as a force point or a force line segment on the vertical plane. The self-locking inclined surface is represented as a self-locking inclined line on the vertical plane. The connection line between the rotation point and the midpoint of the force point or the force line segment is the first connection line. A perpendicular line passing through the rotation point and perpendicular to the self-locking inclined line is the second connection line. The intersection point of the second connection line and the self-locking inclined line is the self-locking point;

[0009] The locking mechanism is configured as follows: the self-locking point is located below the midpoint of the force point or the force line segment, the angle formed by the first connection line and the second connection line is 5°-20°, and the angle of the self-locking inclined line is 60°-80°.

[0010] It is further set that the angle formed by the first connection line and the second connection line is 5°;

[0011] It is further set that the upper surface of the rear end part of the first pipe section is configured with a notch part that extends above the second pipe section and accommodates the release button. The locking notch is located below the notch part. The notch part is correspondingly provided with an opening for the hook of the release button to extend into the locking notch for locking.

[0012] It is further set that the gap between the outer edge side surface of the release button and the peripheral wall of the notch part is ≥0.5 mm;

[0013] It is further set that the thickness of the hook corresponding to the force point or the center of the force line segment is ≥1.6 mm;

[0014] Compared with the prior art, the structure of the utility model is simple and reasonable. By configuring the self-locking point to be located below the force point, as well as the self-locking angle and the inclination angle of the self-locking inclined surface, the locking effect and strength of the locking mechanism are effectively guaranteed, and the stability and reliability of the vacuum cleaner tube are ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of a vacuum cleaner tube of the utility model;

[0016] Figure 2It is a schematic cross-sectional structure diagram at the vertical plane corresponding to the vacuum cleaner tube;

[0017] Figure 3 is Figure 2 an enlarged structural schematic diagram of part A of

[0018] Mark the following reference numerals on it in combination with the attached drawings:

[0019] 100, the first pipe section; 200, the second pipe section; 300, the locking mechanism; 310, the release button; 311, the hook; 312, the rotating shaft; 320, the spring; 330, the locking notch; 340, the notch part; 400, the rotating mechanism; a, the rotation point; b, the self-locking diagonal line; c, the force application point; d, the self-locking point; e, the first connection line; f, the second connection line; g, the inclination angle; h, the self-locking angle; i, the thickness at the force application point; j, the gap between the outer edge side wall and the peripheral wall. Specific embodiments

[0020] Next, in combination with the attached drawings, a specific embodiment of the present invention will be described in detail, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0021] A vacuum cleaner tube of the present invention is as Figure 1 and Figure 2 shown, which is particularly applicable to the structure of a bendable vacuum cleaner tube, including a first pipe section 100, a second pipe section 200, a locking mechanism 300 arranged between the upper surface of the rear end of the first pipe section 100 and the upper surface of the front end of the second pipe section 200, and a rotating mechanism 400 arranged between the lower surface of the rear end of the first pipe section 100 and the lower surface of the front end of the second pipe section 200. The locking mechanism 300 is used for locking between the first pipe section 100 and the second pipe section 200, and the rotating mechanism 400 is used for rotation and folding between the first pipe section 100 and the second pipe section 200.

[0022] In this embodiment, the locking mechanism 300 includes a release button 310 that is pivotally mounted on the first pipe section 100, and a locking notch 330 that is structurally arranged on the second pipe section 200 for cooperating with the release button 310 to lock; symmetrically arranged rotating shafts 312 are provided on both side walls corresponding to the middle of the release button 310 so that the release button 310 can rotate and pivot around the central axis of the rotating shaft 312. A hook 311 is provided corresponding to the rear end of the release button 310 and a spring 320 is provided corresponding to the front end thereof. The spring 320 makes the release button 310 always have an upward tilting movement tendency; the locking notch 330 has a locking portion that cooperates with the hook 311. In this embodiment, the locking portion is shown as the lower front corner of the locking notch 330, and the hook 311 has a self-locking inclined surface that cooperates with the locking portion.

[0023] AsFigure 2 and Figure 3 As shown in Figure 3 , a vertical plane (section) is made along the extension axis of the vacuum cleaner tube at the corresponding release button 310. At this time, the intersection point of the central axis of the rotating shaft 312 and the vertical plane is the rotation point a. The point where the self-locking inclined plane contacts the locking part (the fillet transition at the lower end corner of the locking notch 330) or the surface (the chamfer transition at the lower end corner of the locking notch 330) is shown as the force application point c or the force application line segment on the vertical plane. The self-locking inclined plane is shown as the self-locking inclined line b on the vertical plane. The connection line between the rotation point a and the midpoint of the force application point c or the force application line segment is the first connection line e. The perpendicular line passing through the rotation point a and perpendicular to the self-locking inclined line b is the second connection line f. The intersection point of the second connection line f and the self-locking inclined line b is the self-locking point d; in this embodiment, to ensure the locking effect and strength between the release button 310 and the locking notch 330, the locking mechanism 300 is configured such that the self-locking point d is located below the center of the force application point c or the force application line segment. The self-locking angle h formed by the first connection line e and the second connection line f at the rotation point a is 5° - 20°, and the inclination angle g formed between the self-locking inclined line b and the horizontal line is 60° - 80°.

[0024] In the above solution, the self-locking angle h formed by the first connection line e and the second connection line f is preferably 5°. In this way, it is convenient for the hook 311 to be pressed and disengaged from the locking notch 330. The difficulty of disengaging the hook 311 becomes more and more difficult as the self-locking angle h increases.

[0025] In this embodiment, a notch portion 340 is provided on the upper surface of the rear end portion of the first pipe section 100, which extends above the second pipe section 200 and is for accommodating the release button 310. The release button 310 is arranged in the notch of the notch portion 340, and the gap j between the outer side wall of the release button 310 and the peripheral wall of the notch portion 340 is ≥ 0.5 mm to ensure the pressing and rocking effect of the release button 310; the locking notch 330 is provided on the front end portion of the second pipe section 200 and is located below the notch portion 340. The notch portion 340 is correspondingly provided with an opening for the hook 311 of the release button 310 to extend into the locking notch 330 to achieve locking.

[0026] In this embodiment, the thickness i of the hook 311 at the center of the force application line segment or the force application point is ≥ 1.6 mm, so as to ensure the strength of the hook 311.

[0027] Compared with the prior art, the structure of the present utility model is simple and reasonable. By configuring the self-locking point to be located below the force application point, as well as the angles of the self-locking angle and the inclination angle of the self-locking inclined plane, the locking effect and strength of the locking mechanism are effectively ensured, and the stability and reliability of the vacuum cleaner tube are guaranteed.

[0028] The above are only the embodiments of the present utility model, however, the present utility model is not limited thereto, and any changes that can be conceived by those skilled in the art shall fall within the protection scope of the present utility model.

Claims

1. A locking mechanism between adjacent pipe sections of a vacuum cleaner pipe, which is arranged between the rear end of a first pipe section and the front end of a second pipe section for locking the two, and comprises a release button movably mounted on the first pipe section, and a locking notch structurally arranged on the second pipe section; It is characterized in that The release button is symmetrically provided with rotating shafts on both sides of the middle part thereof so that the release button can rotate around the central axis of the rotating shafts, the release button is provided with a hook at the rear end thereof and a spring at the front end thereof, and the spring makes the front end of the release button always have a tendency to tilt upward; The locking notch has a locking portion that matches the hook, and the hook has a self-locking inclined surface that matches the locking portion; A vertical plane is drawn along the extension axis direction of the vacuum cleaner pipe at the corresponding release button position, the intersection of the central axis of the rotating shaft and the vertical plane is the rotation point, the point or surface where the self-locking inclined surface contacts the locking portion is represented as a force point or force line segment on the vertical plane, the self-locking inclined surface is represented as a self-locking inclined line on the vertical plane, the line connecting the rotation point and the force point or the midpoint of the force line segment is the first connecting line, a vertical line perpendicular to the self-locking inclined line through the rotation point is the second connecting line, and the intersection of the second connecting line and the self-locking inclined line is the self-locking point; The locking mechanism is configured as follows: the self-locking point is located below the force point or the midpoint of the force line segment, the angle formed by the first connecting line and the second connecting line is 5°-20°, and the angle of the self-locking oblique line is 60°-80°.

2. The locking mechanism between adjacent pipe sections of a vacuum cleaner pipe according to claim 1, characterized in that: The angle formed by the first connecting line and the second connecting line is 5°.

3. The locking mechanism between adjacent pipe sections of a vacuum cleaner pipe according to claim 1, characterized in that: The upper surface structure of the rear end of the first pipe section is provided with a notch portion extending to the top of the second pipe section and accommodating a release button, the locking notch is located below the notch portion, and the notch portion is correspondingly provided with an opening for the hook of the release button to extend into the locking notch to achieve locking.

4. The locking mechanism between adjacent pipe sections of a vacuum cleaner pipe according to claim 3, characterized in that: The gap between the outer edge side of the release button and the peripheral wall of the notch portion is ≥0.5 mm.

5. The locking mechanism between adjacent pipe sections of a vacuum cleaner pipe according to claim 1, characterized in that: The thickness of the hook at the corresponding force-bearing point or the center of the force-bearing line segment is ≥1.6 mm.

Images