Electric adjustment device for lumbar support

Abstract

The present invention discloses an electric waist support adjustment device, which is characterized by comprising a positioning plate, a driving rod, a swing rod, a waist support plate and a push rod; the positioning plate is provided with an arc guide groove and a linear guide groove, and the extension line of the linear guide groove passes through the center of the arc guide groove; the swing rod is provided with a first positioning pin and a second positioning pin arranged along the length direction, the first positioning pin is matched in the arc guide groove, and the second positioning pin is matched in the linear guide groove; the middle part of the driving rod is hinged to the center position of the arc guide groove corresponding to the positioning plate, one end of the driving rod is rotatably connected to the first positioning pin, and the other end is hinged to the push rod; the waist support plate is connected to the end of the swing rod located on the outside. The present invention can expand the support range of the waist support plate to meet the user's comfort requirements for waist support.

Description

Technical Field

[0001] The invention relates to the technical field of lumbar supports, and in particular to an electric adjustment device for a lumbar support. Background Art

[0002] In order to further improve the comfort of lying down, electric sofas currently on the market are provided with corresponding lumbar supports in the backrest of the sofa chair. The lumbar supports in the prior art have manual adjustment structures and electric adjustment structures to meet the needs of different users.

[0003] However, when adjusting the lumbar support in the prior art, the adjustment stroke of the lumbar support support part is a circular arc route, resulting in a small adjustment range of the lumbar support. Therefore, there is room for further improvement in the lumbar support adjustment structure in the prior art. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an electric lumbar support adjustment device, which can expand the support range of the lumbar support to meet the user's comfort requirements for lumbar support.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A lumbar support electric adjustment device, characterized in that it comprises a positioning plate, a driving rod, a swing rod, a lumbar support plate and a push rod;

[0007] The positioning plate is provided with an arc-shaped guide groove and a linear guide groove, and the extension line of the linear guide groove passes through the center of the arc-shaped guide groove;

[0008] The swing rod has a first positioning pin and a second positioning pin arranged along the length direction, the first positioning pin is matched in the arc guide groove, and the second positioning pin is matched in the linear guide groove;

[0009] The middle part of the driving rod is hinged to the center position of the arc-shaped guide groove of the positioning plate, one end of the driving rod is rotatably connected to the first positioning pin, and the other end is hinged to the push rod;

[0010] The waist supporting plate is connected to the end portion of the swing rod located at the outer side.

[0011] Preferably, the positioning plate is a cross-shaped structure and includes a first plate body and a second plate body and a third plate body formed on both sides of the first plate body. The arc guide groove is located on the first plate body, the straight line guide groove is located on the second plate body, and the center of the circle corresponding to the arc guide groove is located on the third plate body.

[0012] Preferably, the driving rod and the swing rod are located on the left and right sides of the positioning plate, and both ends of the first plate body are bent toward one side of the driving rod and have connecting holes.

[0013] Preferably, a tension spring is provided between the positioning plate and the swing rod.

[0014] Preferably, the third plate body has a third positioning pin, the swing arm has a fourth positioning pin, and both ends of the tension spring are hooked on the third positioning pin and the fourth positioning pin, respectively.

[0015] The advantages of the present invention are as follows: by guiding the swing arm through the arc guide groove and the linear guide groove on the positioning plate, the running trajectory of the lumbar support plate installed on the swing arm is changed from the circular arc route commonly used in the past to an elliptical motion trajectory, so that the supporting height of the lumbar support plate can be significantly increased, thereby making the range of support provided by the lumbar support plate wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the electric waist support adjustment device provided in this embodiment;

[0017] Figure 2 A schematic diagram of the lumbar support plate in the electric lumbar support adjustment device provided in this embodiment being in an initial state;

[0018] Figure 3 A schematic diagram of the lumbar support plate in the electric lumbar support adjustment device provided in this embodiment being in an unfolded state;

[0019] Figure 4 This is a schematic diagram of the electric lumbar support adjustment device provided in this embodiment in the end position. DETAILED DESCRIPTION

[0020] Combination Figures 1 to 4 The electric waist support adjusting device of the present invention is further described.

[0021] A lumbar support electric adjustment device, characterized in that it includes a positioning plate 2, a driving rod 8, a swing rod 4, a lumbar support plate 6 and a push rod 3. The positioning plate 2 is provided with an arc guide groove 213 and a linear guide groove 221, and the extension line of the linear guide groove 221 passes through the center 232 of the arc guide groove 213. The swing rod 4 is provided with a first positioning pin 41 and a second positioning pin 42 arranged along the length direction, the first positioning pin 41 is located at the first end position of the swing rod 4 and is matched in the arc guide groove 213, and the second positioning pin 42 is located at the middle position of the swing rod 4 and is matched in the linear guide groove 221. The middle part of the driving rod 8 is hinged to the center position 232 of the arc guide groove 213 of the positioning plate 2 through a pin rod, one end of the driving rod 8 is rotatably connected to the first positioning pin 41, and the other end is hinged to the push rod 3 through a pin rod. In this embodiment, the push rod is an electric push rod. The waist support plate 6 is connected to the end portion of the swing rod 4 located on the outside, that is, the waist support plate 6 is connected to the second end of the swing rod 4 .

[0022] like Figure 2 As shown, the positioning plate 2 is a cross-shaped structure, and includes a first plate body 21, a second plate body 22 and a third plate body 23 formed on both sides of the first plate body 21, the arc guide groove 213 is located on the first plate body 21, the linear guide groove 221 is located on the second plate body 22 and is perpendicular to the first plate body 21, and the center 232 corresponding to the arc guide groove 213 is located on the third plate body 23. This structure can reduce the size of the positioning plate 2 as much as possible to improve the compactness of the entire device.

[0023] A tension spring 5 is provided between the positioning plate 2 and the swing rod 4, that is, the third plate 23 has a third positioning pin 231, the swing rod 4 has a fourth positioning pin 43, and the two ends of the tension spring 5 are respectively hooked on the third positioning pin 231 and the fourth positioning pin 43. The tension spring 5 can make the swing rod 4 swing more stably and smoothly.

[0024] The driving rod 8 and the swing rod 4 are located on the left and right sides of the positioning plate 2. The two ends of the first plate body 21 are bent 211 toward the driving rod 8 and have a connecting hole 212. The two ends of the first plate body 21 are bent, and a space can be formed between the installed components during installation to accommodate the driving rod 8.

[0025] When the present invention is used, the two ends of the first plate body 21 of the positioning plate 2 bent toward the driving rod 8 are fixed to the side walls of the backrest frame 1 by bolts, and the motor part of the electric push rod 3 is hinged on the top surface of the backrest frame 1. When the electric push rod 3 is extended or retracted, the first end of the swing rod 4 is driven by the driving rod 8 to move along the arc guide groove 213, and the middle part of the swing rod 4 moves along the linear guide groove 221, so that the lumbar support plate 6 at the second end of the swing rod 4 is swung along the elliptical path 7, thereby forming different support angles and support heights of the lumbar support plate 6 to meet different usage requirements.

[0026] During specific use, in order to improve the stability of movement and support of the lumbar support plate 6, corresponding swing rods 4, positioning plates 2 and tensioning springs 5 ​​are provided on both ends of the lumbar support plate 6. The number of electric push rods 3 used can be limited according to actual needs. This embodiment uses one electric push rod 3.

[0027] Unless otherwise specified, in the present invention, the terms "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in conjunction with the accompanying drawings and according to specific circumstances.

[0028] Unless otherwise clearly specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An electric waist support adjustment device, characterized in that: It includes a positioning plate, a driving rod, a swing rod, a waist support plate and a push rod; The positioning plate is provided with an arc-shaped guide groove and a linear guide groove, and the extension line of the linear guide groove passes through the center of the arc-shaped guide groove; The swing rod has a first positioning pin and a second positioning pin arranged along the length direction, the first positioning pin is matched in the arc guide groove, and the second positioning pin is matched in the linear guide groove; The middle part of the driving rod is hinged to the center position of the arc-shaped guide groove of the positioning plate, one end of the driving rod is rotatably connected to the first positioning pin, and the other end is hinged to the push rod; The waist support plate is connected to the end of the swing rod located on the outside; The positioning plate is a cross-shaped structure and includes a first plate body and a second plate body and a third plate body formed on both sides of the first plate body, the arc guide groove is located on the first plate body, the linear guide groove is located on the second plate body, and the center of the arc guide groove is located on the third plate body; The driving rod and the swing rod are located on the left and right sides of the positioning plate, and the two ends of the first plate body are bent toward one side of the driving rod and have connecting holes; A tension spring is arranged between the positioning plate and the swing rod.

2. The electric waist support adjustment device according to claim 1 is characterized in that: The third plate body is provided with a third positioning pin, the swing rod is provided with a fourth positioning pin, and both ends of the tension spring are respectively hooked on the third positioning pin and the fourth positioning pin.

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