Waist support adjusting mechanism

Abstract

The utility model relates to the technical field of seat waist supports, in particular to a waist support adjusting mechanism which comprises a waist support plate, lifting track rods are arranged on the two sides of the bottom end of the outer wall of the waist support plate respectively, the two ends of each lifting track rod are connected with waist support fixing plates respectively, and a waist support drag hook is installed in the center of the rear end of the inner wall of the waist support plate. Compared with a lifting structure in the prior art, the lifting mechanism has the advantages that the use number of transmission screws is simplified, the number of transmission parts of the lifting mechanism is reduced, the probability that the transmission parts break down can be reduced, and the lifting mechanism is convenient to use and high in practicability. The transmission reliability is improved, the transmission efficiency can also be improved, the number of turns of rotation of the hand wheel is greatly reduced, and the use experience of a user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a seat waist support technical field, concretely relates to a waist support adjusting mechanism. BACKGROUND

[0002] With the improvement of living standards, people's requirements for seat comfort are higher and higher, in order to improve the comfort of the seat, many seat structures are provided with a waist support on the backrest. The existing waist support will consider the adjustment of the front and rear convex (arched) height and the adjustment of the up and down position to adapt to the needs of different users' height, body shape, sitting posture, etc.

[0003] And the patent number CN115153239A discloses a kind of manual adjustment waist support structure and seat, the structure of adjusting the height of the upper and lower position in the patent technology, first pull rope and second pull rope are used to provide pulling force from two directions of upper and lower, make the waist support plate upward and downward movement is active movement rather than passive recovery, make adjustment more accurate;And the waist support plate upward movement adjustment is also downward movement adjustment, the extension of first pull rope and second pull rope is synchronous, can avoid the problem that the lifting height is inconsistent caused by the extension length difference of pull rope;

[0004] However, as known from the above patent specification and the accompanying drawings, in the lifting structure of the above patent technology, two lifting screws are mainly relied on for control, but although the two lifting screws can achieve the effect of lifting and moving, the transmission structure is relatively complex, and when any one connecting structure fails, the entire lifting mechanism cannot be used normally, which inevitably increases the failure rate of the lifting mechanism, and the transmission efficiency of the mechanism is also affected, so there are certain deficiencies.

[0005] In view of the above, it is necessary to invent a waist support adjusting mechanism. UTILITY MODEL CONTENTS

[0006] Therefore, the utility model provides a kind of waist support adjusting mechanism to solve the problem that two lifting screws although can achieve the effect of lifting and moving, but its transmission structure is relatively complex, and when any one connecting structure fails, the entire lifting mechanism cannot be used normally, which inevitably increases the failure rate of the lifting mechanism, and the transmission efficiency of the mechanism is also reduced.

[0007] In order to achieve the above purpose, the utility model provides the following technical scheme: a kind of waist support adjusting mechanism, including waist support plate, the outer wall bottom end of the waist support plate is provided with lifting rail rod on both sides, two the ends of the lifting rail rod are connected with waist support fixed plate, the inner wall rear end center of the waist support plate is installed with waist support hook, the outer wall one side of the waist support plate is provided with the waist support lifting adjusting component for adjusting the height of the waist support plate.

[0008] Preferably, the waist support lifting adjusting component comprises a lifting shell arranged on one side of the outer wall of the waist support plate, and a hand wheel is arranged below the bottom end of the outer wall of the lifting shell.

[0009] Preferably, a transmission rod is fixed to the top end of the outer wall of the hand wheel, a transmission screw is arranged at the bottom end of the inner wall of the lifting shell, and both ends of the transmission screw are rotatably connected to the bottom end of the inner wall of the lifting shell.

[0010] Preferably, a bevel gear set is connected to one end of the transmission screw close to the transmission rod, the upper ends of the transmission rods pass through the top end of the inner wall of the lifting shell and are fixed to the bottom end of the outer wall of the bevel gear at the bottom end position, and the outer wall of the transmission rod is rotatably connected to the corresponding position of the bottom end of the inner wall of the lifting shell.

[0011] Preferably, a transmission nut is threadedly connected to the outer wall of the transmission screw, one end of the first lifting steel wire and one end of the second lifting steel wire are respectively fixed to the outer wall top end of the transmission nut on both sides, and the extension directions of the first lifting steel wire and the second lifting steel wire are oppositely arranged.

[0012] Preferably, a bolt head for fixing one end of the first lifting steel wire away from the lifting shell and a nut head for fixing one end of the second lifting steel wire away from the lifting shell are respectively mounted on both sides of the top end of the outer wall of the waist support hook, and the nut head and the bolt head are fixed by thread connection.

[0013] Preferably, a waist support protruding device is arranged on the outer wall of the waist support plate and away from the lifting shell, a protruding steel wire rope is mounted on the waist support protruding device, and one end of the protruding steel wire rope away from the waist support protruding device is connected to the waist support hook.

[0014] The utility model discloses the beneficial effect is:

[0015] Compared with the lifting structure of the prior art, the utility model simplifies the number of transmission screws, reduces the number of transmission parts of the lifting mechanism, thereby can reduce the probability of transmission part failure, improve the transmission reliability, and also can improve the efficiency of transmission, so that the number of hand wheel rotation is greatly reduced, and the use experience of the user is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic diagram of the utility model's overhead direction;

[0017] Figure 2 It is the partial structure schematic diagram of the utility model's overhead direction;

[0018] Figure 3 It is the structure schematic diagram of the utility model's waist support plate overhead direction;

[0019] Figure 4 It is the internal structure schematic view of the lifting shell cover in the utility model;

[0020] Figure 5 It is the structure schematic view that the transmission rod and the transmission screw rod are connected in detail.

[0021] In the drawing: 100, waist support plate; 110, lifting rail rod; 120, waist support pull hook; 200, lifting shell cover; 210, first lifting steel wire; 211, bolt head; 220, second lifting steel wire; 221, nut head; 230, hand wheel; 231, transmission rod; 232, bevel gear set; 240, transmission screw; 250, transmission nut; 300, waist support protruding device; 310, protruding steel wire rope. DETAILED DESCRIPTION

[0022] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0023] Referring to the accompanying Figures 1-5 , the utility model provides a kind of waist support adjusting mechanism, including waist support plate 100, the outer wall bottom end of waist support plate 100 is provided with lifting rail rod 110 on both sides, the two ends of two lifting rail rods 110 are connected with waist support fixed plate, and the waist support fixed plate can be installed in the waist support part of seat with waist support plate 100 and lifting rail rod 110, and waist support plate 100 can slide up and down along lifting rail rod 110, the rear end center of the inner wall of waist support plate 100 is installed with waist support pull hook 120, to adjust its position, the outer wall of waist support plate 100 and the side away from lifting shell cover 200 are provided with waist support protruding device 300, protruding steel wire rope 310 is installed on waist support protruding device 300, one end of protruding steel wire rope 310 away from waist support protruding device 300 is connected with waist support pull hook 120, (the specific structure of waist support protruding device 300 is disclosed in detail in patent No.CN115153239A one kind of manually adjusted waist support structure and its seat, the utility model does not make too much description here);

[0024] The outer wall side of the waist support plate 100 is provided with a waist support lifting adjusting component for adjusting the height of the waist support plate 100. The waist support lifting adjusting component comprises a lifting shell cover 200 provided on the outer wall side of the waist support plate 100. The lifting shell cover 200 provides a mounting position for the transmission rod 231 and the transmission screw 240. A hand wheel 230 is arranged at the bottom end of the outer wall of the lifting shell cover 200. The hand wheel 230 is arranged to facilitate personnel to rotate the bevel gear set 232. The outer wall top end of the hand wheel 230 is fixedly provided with the transmission rod 231. The hand wheel 230 can drive the bevel gear set 232 connected thereto to rotate through the transmission rod 231 when rotating. The inner wall bottom end of the lifting shell cover 200 is provided with the transmission screw 240. The two ends of the transmission screw 240 are rotatably connected on the inner wall bottom end of the lifting shell cover 200. The inner wall top end of the lifting shell cover 200 is integrally provided with a U-shaped clamping block at the corresponding position of the two ends of the transmission screw 240. The two ends of the transmission screw 240 can rotate between the U-shaped clamping blocks through bearings. The end of the transmission screw 240 close to the transmission rod 231 is connected with the bevel gear set 232. The bevel gear set 232 is composed of two bevel gears. The two bevel gears are meshed with each other. The opposite end of the transmission screw 240 and the transmission rod 231 are respectively fixedly connected with a bevel gear. In this way, personnel can rotate the transmission screw 240 in the forward and reverse directions through the hand wheel 230. The upper end of the transmission rod 231 penetrates through the inner wall top end of the lifting shell cover 200 and is fixedly connected with the outer wall bottom end of the bevel gear at the bottom end position. The outer wall of the transmission rod 231 is rotatably connected with the corresponding position of the inner wall bottom end of the lifting shell cover 200.

[0025] The outer wall of the transmission screw 240 is threadedly connected with a transmission nut 250, the outer wall top end of the transmission nut 250 is fixed with one end of the first lifting steel wire 210 and the second lifting steel wire 220 respectively, the transmission nut 250 is slidably connected with the inner wall of the lifting shell 200, so that the transmission screw 240 can drive the transmission nut 250 to move on the inner wall of the lifting shell 200 when the transmission screw 240 rotates forward and reversely, the extending directions of the first lifting steel wire 210 and the second lifting steel wire 220 are oppositely arranged, the outer wall top end of the waist support lifting hook 120 is respectively provided with a bolt head 211 for fixing the end of the first lifting steel wire 210 away from the lifting shell 200 and a nut head 221 for fixing the end of the second lifting steel wire 220 away from the lifting shell 200, the nut head 221 and the bolt head 211 are fixed by threadedly connecting, the bolt head 211 and the nut head 221 are arranged to connect and fix the other ends of the first lifting steel wire 210 and the second lifting steel wire 220 with the waist support lifting hook 120, the lengths of the first lifting steel wire 210 and the second lifting steel wire 220 are fixed, when the transmission nut 250 moves, the first lifting steel wire 210 and the second lifting steel wire 220 arranged on the transmission nut 250 can be elongated or shortened according to the movement direction of the transmission nut 250, so as to drive the waist support plate 100 to move up and down on the outer wall of the lifting track rod 110.

[0026] The use process of the utility model is as follows: the skilled person in the art can assemble the device according to the above description, and install it at the position of the seat for installing the waist support, when the personnel need to adjust the up-down height position of the waist support plate 100, the personnel can turn the hand wheel 230, so that the hand wheel 230 drives the conical gear connected therewith to rotate, the conical gear rotates and drives the other conical gear meshed therewith to rotate, so that the transmission screw 240 can rotate forward and reversely, the transmission screw 240 can drive the transmission nut 250 to move along the outer wall of the transmission screw 240 when rotating, the transmission nut 250 can pull the lifting steel wire opposite to the movement direction and relax the lifting steel wire opposite to the movement direction when rotating, the first lifting steel wire 210 and the second lifting steel wire 220 can be controlled to be stretched or relaxed by this mode, so that the first lifting steel wire 210 and the second lifting steel wire 220 drive the waist support plate 100 to move up and down along the outer wall of the lifting track rod 110, so that the height position of the waist support plate 100 can be adjusted.

[0027] The above is only the preferred embodiment of the utility model, any skilled person in the art can modify the utility model by using the technical solutions described above or modify it into equivalent technical solutions. Therefore, any simple modification or equivalent replacement according to the technical solutions of the utility model is within the scope of protection of the utility model.

Claims

1. A lumbar support adjustment mechanism, comprising a lumbar support plate (100), wherein lifting rail rods (110) are provided on both sides of the bottom end of the outer wall of the lumbar support plate (100), and lumbar support fixing plates are connected to both ends of the two lifting rail rods (110), and a lumbar support hook (120) is installed at the center of the rear end of the inner wall of the lumbar support plate (100), characterized in that: The outer wall side of the waist support plate (100) is provided with a waist support lifting adjusting component for adjusting the height of the waist support plate (100).

2. A lumbar support adjustment mechanism according to claim 1, wherein: The waist support lifting adjusting component comprises a lifting shell (200) provided on the outer wall side of the waist support plate (100), and a hand wheel (230) is arranged below the bottom end of the outer wall of the lifting shell (200).

3. A lumbar support adjustment mechanism according to claim 2, wherein: The outer wall top end of the hand wheel (230) is fixed with a transmission rod (231), the inner wall bottom end of the lifting shell (200) is provided with a transmission screw (240), and both ends of the transmission screw (240) are rotationally connected on the inner wall bottom end of the lifting shell (200).

4. A lumbar support adjustment mechanism according to claim 3, wherein: The end of the transmission screw (240) close to the transmission rod (231) is connected with a bevel gear set (232), the upper end of the transmission rod (231) passes through the inner wall top end of the lifting shell (200) and is fixed with the outer wall bottom end of the bevel gear at the bottom position, and the outer wall of the transmission rod (231) is rotationally connected with the corresponding position of the inner wall bottom end of the lifting shell (200).

5. A lumbar support adjustment mechanism according to claim 4, wherein: The outer wall of the transmission screw (240) is threadedly connected with a transmission nut (250), the outer wall top end of the transmission nut (250) is fixed with one end of the first lifting steel wire (210) and the second lifting steel wire (220) respectively, and the extension directions of the first lifting steel wire (210) and the second lifting steel wire (220) are oppositely arranged.

6. A lumbar support adjustment mechanism according to claim 5, wherein: The outer wall top end of the waist support lifting hook (120) is respectively provided with a bolt head (211) for fixing one end of the first lifting steel wire (210) away from the lifting shell (200) and a nut head (221) for fixing one end of the second lifting steel wire (220) away from the lifting shell (200), and the nut head (221) and the bolt head (211) are fixed by thread connection.

7. A lumbar support adjustment mechanism according to claim 2, wherein: The outer wall of the waist support plate (100) and the side away from the lifting shell (200) is provided with a waist support protruding device (300), the protruding steel wire rope (310) is connected with the waist support lifting hook (120) at the end away from the waist support protruding device (300).

Images