EP4674319A1

EP4674319A1 - Slow descent structure, and height-adjustable bed handrail using same

Info

Publication number: EP4674319A1
Application number: EP23924680.4A
Authority: EP
Inventors: Niels GROSTOL NIELSEN
Original assignee: Mbl Xiamen Co Ltd
Current assignee: Mbl Xiamen Co Ltd
Priority date: 2023-03-02
Filing date: 2023-03-02
Publication date: 2026-01-07
Also published as: WO2024178712A1

Abstract

The utility model discloses a slow-descending mechanism and a height adjustable bed railing in which slow-descending mechanism is applied, comprising a first pipe fitting and a second pipe fitting inserted into the first pipe fitting, the inner wall of the first pipe fitting and/ or the outer wall of the second pipe fitting is provided with a sliding groove, and a friction block is placed in the sliding groove; when the sliding groove is on the inner wall of the first pipe fitting, the groove depth decreases along the direction of the second pipe fitting retracting into the first pipe fitting, and the friction block slides under the friction of the second pipe fitting outer wall to slide to the sliding groove shallow part, when the second pipe fitting is retracted into the first pipe fitting, and when the first pipe fitting is extended out of, it slides to the sliding groove depth part; when the sliding groove is on the outer wall of the second pipe fitting, the sliding groove depth increases along the direction of the second pipe fitting retracting into the first pipe fitting, and the friction block slides under the friction of the inner wall of the first pipe fitting, so that when the second pipe fitting is retracted into the first pipe fitting, it slides to the sliding groove shallow part, when the first pipe fitting is extended, it slides to the depth of the groove; also discloses a height-adjustable bed railing that utilizes this slow-descending mechanism to realize descending. The utility model discloses a device that utilizes telescopic rod to carry out height adjustment is slowly lowered when descending.

Description

Technical Field

The present invention relates to the technical field of height adjusting device, in particular to a slow-descending mechanism and a hight adjustable bed railing to which it is applied.

Prior Art

Some devices use longitudinally arranged telescopic rods for height adjustment, such as telescopic ladders, grips of trolley boxes, the lifting handrail or guardrail etc. Such devices usually have a locking mechanism through which the telescopic rods can be locked adjacent to each other. The telescopic movement between the two sections locks the device at a predetermined height. When the height needs to be lowered, the locking mechanism is unlocked. At this time, the telescopic rod located above, and the components connected to it will fall due to gravity. If the falling speed is too fast, it will easily get pinched. If the user is injured or bruised, violent collisions will occur when falling to the lower limit position. If the slow descent of telescopic rods at all levels during contraction can be achieved through a simple and reliable mechanism, the above problems can be effectively solved.
The object of the present invention is to provide a slow-descending mechanism and the application of its in height-adjustable bed railing, overcoming the above defects, to achieve a gentle descent when making use of a longitudinally set telescopic rod for height adjustment of the device when descending.
To achieve the above purpose, the present utility model solution is: a slow-descending mechanism, comprising a first pipe fitting and a second pipe fitting, the second pipe fitting telescopically inserted in the first pipe fitting, the inner wall of the first pipe fitting and/or the outer wall of the second pipe fitting are opened, slow-descending mechanism comprises a sliding groove and a friction block which is movably placed in the sliding groove. When the sliding groove is located on the inner wall of the first pipe fitting, the sliding groove depth decreases along the direction of the second pipe fitting retracted into the first pipe fitting, the friction block slides under the friction of the outer wall of the second pipe fitting, so that when the second pipe fitting is retracted into the first pipe fitting, it slides to a sliding groove shallow part and the outer wall of the second pipe fitting is compressed, and when the second pipe fitting stretches out the first pipe fitting, it slides to a sliding groove depth part and loosens the outer wall of the second pipe fitting. When the sliding groove is located on the outer wall of the second pipe fitting, the sliding groove depth increases along the direction of the second pipe fitting retracted into the first pipe fitting, and the friction block slides under the friction of the inner wall of the first pipe fitting, so that when the second pipe fitting is retracted into the first pipe fitting, it slides to sliding groove shallow part and compresses the inner wall of the first pipe fitting, and when the second pipe fitting stretches out the first pipe fitting, it slides to sliding groove depth part and loosens the inner wall of the first pipe fitting.
Further, the friction coefficient between the friction block and the outer wall of the second pipe fitting or the inner wall of the first pipe fitting directly opposite the sliding grove is greater than the friction coefficient between the friction block and the bottom of the sliding groove.
Further, a lubricant is applied between the friction block and the bottom of sliding groove.
Further, the second pipe fitting slides upwards to extends out the first pipe fitting and the second pipe fitting slides down to retracts into the first pipe fitting.
Further, the width of the sliding groove is equal to width of the friction block.
Further, the friction block is made of a rubber.
A height-adjustable bed railing, comprising a crossbar and a locking mechanism, the bottom side of both ends of the crossbar is respectively connected with a slow-descending mechanism, and the two slow-descending mechanisms are arranged in parallel, and the locking mechanism is used for locking or unlocking the sliding of the second pipe fittings on the first pipe fittings on the two slow-down mechanisms.
Further, the bottom side of both ends of the crossbar is respectively fixed with a longitudinally extended third pipe fitting, the third pipe fitting is inserted in the second pipe fitting in a longitudinal slid, and the locking mechanism is also used for locking or unlocking the slide of the third pipe fitting in the second pipe fitting.
Further, the inner wall of the second pipe fitting and / or the outer wall of the third pipe fitting is recessed into a sliding groove in which a friction block is movably placed. When, the sliding groove is located on the second pipe fitting inner wall, the sliding groove depth decreases along the direction of the third pipe fitting retracted into the second pipe fitting, and the friction block slides under the friction of the third pipe fitting outer wall, so that when the third pipe fitting is retracted into the second pipe fitting, it slides to the sliding groove shallow part and compresses on the third pipe fitting outer wall, and when the third pipe fitting stretches out the second pipe fitting, it slides to the sliding groove depth part and loosens the third pipe fitting outer wall. When, the sliding groove is located on the third pipe fitting outer wall, the sliding groove depth increases along the direction of the third pipe fitting retracted into the second pipe fitting, and the friction block slides under the friction of the second pipe fitting inner wall, so that when the third pipe fitting is retracted into the second pipe fitting, it slides to the sliding groove shallow part and compresses the second pipe fitting inner wall, and when the third pipe fitting extends out of the second pipe fitting, it slides to the sliding groove depth part and loosens the inner wall of the second pipe fitting.
After adopting the scheme, the beneficial effects of the utility model are that: when the second pipe fitting is retracted into the first pipe fitting, the friction block is driven to move to the sliding groove shallow part, the friction block is pressed against the second pipe fitting outer wall or the first pipe fitting inner wall, so that the friction between the friction block and the second pipe fitting outer wall or the first pipe fitting inner wall provides damping for the second pipe fitting to retract into the first pipe fitting and realizing slow descent, and when the second pipe fitting stretches out the first pipe fitting, the friction block is driven to move to the sliding groove depth part, and the friction block loosens the second pipe fitting outer wall or the first pipe fitting inner wall, and then the damping is eliminated.

Description of the drawings

Fig. 1: is a schematic diagram of the mechanism when the second pipe fitting of the slow descending mechanism has the sliding grooves formed in the second pipe fitting outer wall and the second pipe fitting is retracted into the first pipe fitting;
Fig. 2: is a partial enlarged view of A in Fig. 1;
Fig. 3: is a schematic diagram of the mechanism when the second pipe fitting of the slow descending mechanism has the sliding groove formed in the second pipe fitting outer wall and the second pipe fitting extends out of the first pipe fitting;
Fig. 4: is a partial enlarged view of B in Fig. 3;
Fig. 5: is a schematic diagram of the mechanism when the second pipe fitting of the slow descending mechanism has the sliding groove formed in the first pipe fitting inner wall and the first pipe fitting is retracted into the first pipe fitting;
Fig. 6: is a schematic diagram of the three-dimensional mechanism of height adjustable bed railing of the utility model;
Fig. 7: is a schematic diagram of the cross-sectional mechanism of the third pipe fitting retracted into the second pipe fitting;
Fig. 8: is a partial enlarged view at C in Fig. 7;
Fig. 9: is a schematic diagram of the cross-sectional mechanism of the third pipe fitting extended out from the second pipe fitting;
Fig. 10: is a partial enlarged view of D in Figure 9.

Designator Description:1-Second pipe fittings, 2-First pipe fittings, 3-The outer wall of the second pipe fitting, 4-Inner wall of the first pipe fitting, 5-sliding groove, 6-friction block, 7-sliding groove shallow part, 8- sliding roove depth part, 9-crossbar, 10-locking mechanism, 11-third pipe fitting, 12-the outer wall of the third pipe fitting, 13-the inner wall of the second pipe fitting.

The specific embodiment

The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.
The present invention provides a slow descending mechanism, focusing on the combination of Figure 1-5, comprising a longitudinally provided second pipe fitting 1 and the first pipe fitting 2, the cross-sectional shape of the second pipe fitting 1 and the first pipe fitting 2 is not specifically limited, the second pipe fitting 1 is slidably inserted in the first pipe fitting 2, the first pipe fitting 2 is extended out or retracted by moving, the second pipe fitting 1 is preferably slipped up and extends out of the first pipe fitting 2, and the second pipe fitting slides down and retracts into the first pipe fitting 2;. The outer wall of the second pipe fitting 3 and/or the inner wall of the first pipe fitting 4 is recessed into a sliding groove 5, and the sliding groove 5 is movably placed with a friction block 6, preferably in this embodiment the sliding groove 5 is an elliptical long groove, and the friction block 6 is preferably made of rubber material, and the width is equal with the width of the sliding groove 5. Focusing on the combination of Figure 1-4, when the sliding groove 5 is formed in the outer wall 3 of the second pipe fitting, the sliding groove depth part increases along the direction of the second pipe fitting 1 sliding into the first pipe fitting 2, and the key point is shown in Figure 5, when the sliding groove 5 is formed in the inner wall of the first pipe fitting 4, the sliding groove depth part decreases along the direction of the second pipe fitting 1 sliding into the first pipe fitting 2. Focusing on FIG. 1-4, for the sliding groove 5 that is arranged on the outer wall of the second pipe fitting 3, its opening is facing the inner wall of the first pipe fitting 4. Focusing on Figure 1 and Figure 2, in the process of the second pipe fitting 1 being retracted into the first pipe fitting 2, the friction block 6 in the sliding groove 5 is rubbed by the inner wall 4 of the first pipe fitting, so that the friction block 6 slides in reverse relative to the second pipe fitting 2, the friction block 6 moves to the sliding groove shallow part 7, and sliding groove shallow part 7 is pushed against the friction block 6 and compresses on the inner wall 4 of the first pipe fitting, and then by the friction between the friction block 6 and the inner wall of the first pipe fitting 4, the second pipe fitting 1 is retracted into the first pipe fitting 2 by providing damping, and the slow descent is realized. As shown in Figure 4, in the process of the second pipe fitting 1 extending out of the first pipe fitting 2, the friction block 6 in the sliding groove 5 is rubbed by the inner wall 4 of the first pipe fitting, thereby sliding in reverse relative to the second pipe fitting 2, so that the friction block 6 moves to the sliding groove depth part 8, and is collected in the sliding groove 5 to loosen the compression of the inner wall 4 of the first pipe fitting. Focusing on Figure 5, for the sliding groove 5 arranged on the inner wall of the first pipe fitting 4, its opening is facing the outer wall of the second pipe fitting 3, in the process of the second pipe fitting 1 retracting into the first pipe fitting 2, the friction block 6 in the sliding groove 5 is rubbed by the outer wall 3 of the second pipe fitting, so that under the displacement of the second pipe fitting 1, the second pipe fitting 1 moves to the sliding groove shallow part 7, and sliding groove shallow part 7 pushes against the friction block 6 and compresses it on the outer wall 3 of the second pipe fitting, and then provides damping for the second pipe fitting 1 to retract into the first pipe fitting 2 with the friction between the friction block 6 and the outer wall 3 of the second pipe fitting, so that the slow descent is realized. In the process of the second pipe fitting 1 stretching out the first pipe fitting 2, the friction block 6 in the sliding groove 5 is rubbed by the outer wall 3 of the second pipe fitting, so that under the displacement of the second pipe fitting 1, it moves with the second pipe fitting 1 to the sliding groove depth part 8, adduct to sliding groove 5 to loosen the compression to the outer wall 3 of the second pipe fitting.
In order to ensure that friction block 6 can slide along the sliding groove 5 with the friction drive of the first pipe fitting inner wall 4 or the second pipe fitting outer wall 3 the sliding groove 5 is directly opposite, and prevent the deformation and reversal of the friction block 6 of rubber material. The friction coefficient between the second pipe fitting outer wall 3 or the first pipe fitting inner wall 4 the friction block 6 is directly opposite to the sliding groove 5 is greater than the friction coefficient between the friction block 6 and the bottom of the sliding groove 5, preferably between the friction block 6 and the bottom of the sliding groove 5 lubricant is applied.
The present invention also provides a height-adjustable bed railing, as shown in Figure 6-10, comprises a crossbar 9 and a locking mechanism 10, the bottom side of both ends of the crossbar 9 is respectively connected with a slow-descending mechanism, and the both slow-descending mechanisms are arranged in parallel, the locking mechanism 10 is used for locking or unlocking the sliding of the second pipe fitting 1 on the both slow-descending mechanisms on the first pipe fitting 2, the mechanism of the locking mechanism 10 is not specifically limited, and can be any existing mechanism that can realize the above-mentioned functions.
Specifically, in the present embodiment, in order to achieve three-section telescopically and longitudinally extending third pipe fitting 11 is respectively fixed on the bottom side of both ends of the crossbar 9. The third pipe fitting 11 is inserted in the second pipe fitting 1 in a longitudinal sliding direction, the locking mechanism 10 is also used for locking or unlocking the sliding of the third pipe fitting 11 on the second pipe fitting 1. The third pipe fitting 11 and the second pipe fitting 1 also form the aforesaid slow-descending mechanism, the outer wall of the third pipe fitting 12 and/or the second pipe fitting inner wall 13 is recessed into a sliding groove 5, and a friction block 6 is movably placed in the sliding groove 5 5, when the sliding groove 5 is located on the inner wall 13 of the second pipe fitting. The sliding groove depth decreases along the direction of the third pipe fitting 11 retracted into the second pipe fitting 1, and the friction block 6 slides under the friction of the third pipe fitting outer wall 12, so that the second pipe is retracted into the third pipe fitting 11. When the second pipe fitting 1 slides to the sliding groove shallow part 7, it compresses on the outer wall of the third pipe fitting 12, when the third pipe fitting 11 extended out of the second pipe fitting 1, it slides to the sliding groove depth part 8 to loosens the outer wall of the third pipe fitting 12. When the sliding groove 5 is located on the outer wall of the third pipe fitting 12, the sliding groove depth increases along the direction of the third pipe fitting 11 retracted into the second pipe fitting 1, and the friction block 6 slides under the friction of the second pipe fitting inner wall 13 to retract the second pipe into the third pipe fitting 11. When the pipe fitting 1, slide to the sliding groove shallow part 7, it compresses on the inner wall 13 of the second pipe fitting, and when the third pipe fitting 11 extends out of the second pipe fitting 1, it slides to the sliding groove depth part 8, and loosen the inner wall 13 of the second pipe fitting.
The present invention is described above as a preferred embodiment. The design concept of the invention is not limited to this embodiment, and the scope of the invention should not be confined to it. Any non-essential modifications to the invention based on this concept, including equivalent changes and modifications made within the scope of the patent claims and the disclosure of the specification, shall be deemed to fall within the scope of the invention.

Claims

A slow-descending mechanism, characterized in that it comprises a first pipe fitting (2) and a second pipe fitting (1), the second pipe fitting (1) is telescopically inserted in the first pipe fitting (2), the inner wall of the first pipe fitting (4) and/or the outer wall of the second pipe fitting (3) are opened, slow-descending mechanism comprises a sliding groove (5) and
a friction block (6) which is movably placed in the sliding groove (5):
when the sliding groove (5) is located on the inner wall (4) of the first pipe fitting, the sliding groove depth decreases along the direction of the second pipe fitting (1) retracted into the first pipe fitting (2), the friction block (6) slides under the friction of the outer wall of the second pipe fitting (3), so that when the second pipe fitting (1) is retracted into the first pipe fitting (2), it slides to a sliding groove shallow part (7) and the outer wall of the second pipe fitting (3) is compressed, and when the second pipe fitting (1) stretches out the first pipe fitting (2), it slides to a sliding groove depth part (8) and loosens the outer wall of the second pipe fitting (3);

when the sliding groove (5) is located on the outer wall (3) of the second pipe fitting, the sliding groove depth increases along the direction of the second pipe fitting (1) retracted into the first pipe fitting (2), and the friction block (6) slides under the friction of the inner wall of the first pipe fitting (4), so that when the second pipe fitting (1) is retracted into the first pipe fitting (2), it slides to sliding groove shallow part (7) and compresses the inner wall of the first pipe fitting (4), and when the second pipe fitting (1) stretches out the first pipe fitting (2), it slides to sliding groove depth part (8), and loosens the inner wall of the first pipe fitting (4).
The slow-descending mechanism according to claim 1, characterized in that the friction coefficient between the friction block (6) and the outer wall (3) of the second pipe fitting or the inner wall (4) of the first pipe fitting directly opposite the sliding grove (5) is greater than the friction coefficient between the friction block (6) and the bottom of the sliding groove (5).
The slow-descending mechanism according to claim 1, characterized in that a lubricant is applied the friction block (6) and the bottom of sliding groove (5).
The slow-descending mechanism according to claim 1, characterized in that the second pipe fitting (1) slides out of the first pipe fitting (2), and the second pipe fitting slides down to retracts into the first pipe fitting (2).
The slow-descending mechanism according to claim 1, characterized in that the width of the sliding groove (5) is equal to width of the friction block (6).
The slow-descending mechanism according to claim 1, characterized in that the friction block (6) is made of a rubber.
The height adjustable bed railing, characterized in that it comprises a crossbar (9) and a locking mechanism (10), the bottom side of both ends of the crossbar (9) is respectively connected to a slow-descending mechanism as claimed in any one of claims 1 to 6, and the two slow-descending mechanisms are arranged in parallel, and the locking mechanism (10) is used for locking or unlocking sliding of the second pipe fittings (1) on the first pipe fittings (2) on the two slow-descending mechanisms.
The height adjustable bed railing according to claim 7, characterized in that the bottom side of both ends of the crossbar (9) is respectively fixed with a longitudinally extended third pipe fitting (11), the third pipe fitting (11) is inserted in the second pipe fitting (1) in a longitudinal slid, and the locking mechanism (10) is also used for locking or unlocking the slide of the third pipe fitting (11) in the second pipe fitting (1).
The height adjustable bed railing according to claim 8, characterized in that the inner wall (13) of the second pipe fitting and/or the outer wall (12) of the third pipe fitting is recessed into a sliding groove (5) in which a friction block (6) is movably placed:
when the sliding groove (5) is located at the second pipe fitting inner wall (13), the sliding groove depth decreases along the direction of the third pipe fitting (11) retracted into the second pipe fitting (1), and the friction block (6) slides under the friction of the third pipe fitting outer wall (12), so that when the third pipe fitting (11) is retracted into the second pipe fitting (1), it slides to the sliding groove shallow part (7) and compresses on the third pipe fitting outer wall (12), when the third pipe fitting (11) stretches out the second pipe fitting (1), it slides to the sliding groove depth part (8) and loosens the third pipe fitting outer wall (12);

when the sliding groove (5) is located on the third pipe fitting outer wall (12), the sliding groove depth increases along the direction of the third pipe fitting (11) retracted into the second pipe fitting (1), and the friction block (6) slides under the friction of the second pipe fitting inner wall (13), so that when the third pipe fitting (11) is retracted into the second pipe fitting (1), it slides to the sliding groove shallow part (7), and compresses the second pipe fitting inner wall (13), and when the third pipe fitting (11) stretches out the second pipe fitting (1), it slides to the sliding groove depth part (8), and loosens the inner wall of the second pipe fitting (13).