Cable-driven four-way lumbar support

Abstract

The present invention discloses a four-way lumbar support driven by cable traction, including a support assembly located inside a backrest frame, the upper end of the support assembly is rotatably matched with the backrest frame, the support assembly includes a support body and a Z-direction driving mechanism for driving the support body to move along the height direction of the backrest frame; an X-direction driving mechanism, which includes a cable and a cable motor for controlling the movement of the cable, wherein the cable is supported at the lower end of the rear side of the support assembly, and the cable motor can drive the support assembly to move along the thickness direction of the backrest frame; and a first tension spring and a second tension spring respectively connected to the two ends of the backrest frame, and the ends of the first tension spring and the second tension spring away from the backrest frame are both connected to the cable. The beneficial effect of the present invention is that the support assembly can adaptively float with the thrust or deadweight of the back of the human body, and form an elastic support, which is more comfortable than the traditional lumbar support.

Description

Technical Field

[0001] The invention relates to an automobile seat component, in particular to a cable-driven four-way lumbar support. Background Art

[0002] With the development of automobile technology, consumers have higher and higher requirements for the comfort of car seats. An important criterion for evaluating whether a seat is comfortable is whether it can effectively relieve driving fatigue. In traditional seat design, it usually only includes a seat cushion and a backrest. The seat cushion is supported by the seat pan, and the backrest is supported by the backrest frame. Such a seat structure does not fully consider the support performance of the human body, causing the human waist to be in a suspended posture, and the driver and passengers are prone to waist fatigue after sitting for a long time.

[0003] Therefore, a lumbar support technology applied to seats has also come into being, namely the so-called lumbar support. The lumbar support can alleviate the lumbar fatigue of the driver and passengers caused by the waist being suspended in the air to a certain extent. In the prior art, whether it is a fixed lumbar support or an adjustable lumbar support, in the process of supporting the user's waist, the lumbar support is completely fixed relative to the backrest and cannot float adaptively with the body's own weight, resulting in poor comfort. Summary of the invention

[0004] In view of this, the present invention provides a cable-driven four-way lumbar support to solve the technical problem of poor comfort of conventional adjustable lumbar supports.

[0005] To achieve the above purpose, the technical solution of the present invention is as follows:

[0006] A cable-driven four-way lumbar support, the key of which is to include:

[0007] Backrest frame;

[0008] A support assembly, which is located inside the backrest frame, the upper end of which is rotatably matched with the backrest frame, and the support assembly includes a support body and a Z-direction driving mechanism for driving the support body to move along the height direction of the backrest frame;

[0009] An X-axis driving mechanism, comprising a cable and a cable motor for controlling the movement of the cable, wherein the cable is supported at the rear lower end of the support assembly, and the cable motor can drive the support assembly to move along the thickness direction of the backrest frame; and

[0010] A first tension spring and a second tension spring are respectively connected to two ends of the backrest frame, and ends of the first tension spring and the second tension spring away from the backrest frame are both connected to the cable.

[0011] With the above structure, the lower end of the support assembly is suspended and supported in the backrest frame by the first tension spring and the second tension spring, and the upper end of the support assembly can rotate relative to the backrest frame, so when the user's waist is supported on the support assembly, the support assembly can adaptively float with the thrust or deadweight of the human back, and form an elastic support with better comfort. At the same time, under the action of the Z-direction drive mechanism and the X-direction drive mechanism, the support position of the support assembly in the backrest height direction and the front and back directions can be adjusted, so that it is suitable for users of different body shapes. The X-direction drive mechanism adopts the method of cable retraction and release to realize the front and back adjustment of the support assembly, which has the advantages of novel structure and convenient adjustment.

[0012] Preferably, the cable is connected with a suspended guide sleeve and two sets of fixed guide sleeves that are slidably matched with the cable, wherein the two sets of fixed guide sleeves are fixedly installed at the rear lower end of the support assembly, and the end of the first tension spring away from the backrest frame is hung on the suspended guide sleeve. The above structure can ensure that the cable motor drives the cable to move, and that both ends of the cable are suspended on the backrest frame by the spring, which has the technical advantages of reasonable structural design and high reliability.

[0013] Preferably, the backrest frame is provided with a mounting plate at positions corresponding to the first tension spring and the second tension spring, the mounting plate is provided with a connection hole, the suspended guide sleeve is provided with a first mounting seat, and the cable is provided with a second mounting seat at the end away from the cable motor. The above structure is adopted to facilitate the installation of the first tension spring and the second tension spring.

[0014] Preferably, a retaining rod is fixedly installed between the two groups of fixed guide sleeves. The above structure can ensure the stability of the two groups of fixed guide sleeves installed at the lower end of the rear side of the support assembly.

[0015] Preferably, the cable motor is fixedly mounted on the side of the backrest frame, and the suspended guide sleeve is provided with a first straight hole and a second straight hole perpendicular to each other, and an arc hole is provided between the first straight hole and the second straight hole. The above structure enables the cable to transition from vertical to horizontal, which is beneficial to the cable assembly.

[0016] As a preferred embodiment, a spring steel wire is horizontally placed in the middle of the backrest frame, and the upper end of the support assembly is rotatably connected to the spring steel wire. With the above structure, the spring steel wire can also provide a certain elastic supporting force, which helps to further improve the comfort of the lumbar support.

[0017] Preferably, the support assembly has two guide steel wires arranged along the height direction of the backrest frame, a transverse steel wire is integrally connected between the lower ends of the two guide steel wires, and the upper ends of the two guide steel wires are rotatably connected to the spring steel wire. With the above structure, the support assembly and the backrest frame are rotatably assembled.

[0018] As a preferred embodiment: the two ends of the support body are slidably mounted on the two guide wires, the Z-direction drive mechanism includes a screw rod, a nut sleeve threadedly mounted on the screw rod, and a motor driving the nut sleeve to rotate, the motor is fixed to the support body, the upper end of the screw rod is hooked on the spring wire through a hook, and the lower end is fixedly connected to the transverse wire. With the above structure, the motor can drive the support body to move along the height direction of the backrest when it is working.

[0019] Preferably, the support assembly is provided with a support plate located at the front side of the support body, the support plate is elastic, and the upper end of the support plate is rotatably connected to the spring wire. The above structure can provide flexible support for the waist of the driver and passenger, and relieve waist fatigue caused by waist hanging in the air or sitting for a long time.

[0020] Preferably, the upper end of the support plate is provided with a hanging structure protruding backwards, the hanging structure has a hanging groove opening downwards, and the side of the hanging groove is provided with an elastic latch. The above structure is adopted to facilitate assembly.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. Under the action of the first tension spring and the second tension spring, the support assembly can adaptively float with the thrust or deadweight of the back of the human body and form an elastic support, which is more comfortable than the traditional lumbar support structure.

[0023] 2. The lumbar support can be adjusted in the Z and X directions, that is, the support height and front and rear support positions of the support component are adjustable, so as to meet the needs of users of different body shapes and have good versatility.

[0024] 3. The X-direction adjustment of the lumbar support is driven by cable traction, which has the advantages of novel structure and convenient adjustment.

[0025] 4. The spring steel wire and the support plate on the front side of the support body are both elastic components, which can provide flexible support for the user's waist and provide better comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure after the lumbar support hides the backrest frame (from the front side of the backrest);

[0028] Figure 3 This is a schematic diagram of the structure after the lumbar support hides the backrest frame (viewed from the back side of the backrest);

[0029] Figure 4 It is a cross-sectional view of the suspended guide bushing. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with embodiments and drawings.

[0031] like Figures 1 to 3 As shown, a cable-driven four-way lumbar support comprises a backrest frame 1, a support assembly 2 is arranged inside the backrest frame 1, the support assembly 2 is used to support the user's waist, a spring steel wire 8 is horizontally arranged in the middle of the backrest frame 1, the upper end of the support assembly 2 is rotatably connected to the spring steel wire 8, an X-direction driving mechanism 3 is arranged inside the backrest frame 1, the X-direction driving mechanism 3 comprises a cable 3b and a cable motor 3a for controlling the movement of the cable 3b, wherein the cable 3b is supported at the rear lower end of the support assembly 2, and the backrest frame 1 is located near the lower ends of the support assembly 2. The first tension spring 4 and the second tension spring 5 are respectively connected to the backrest frame 1, and the ends of the first tension spring 4 and the second tension spring 5 away from the backrest frame 1 are connected to the cable 3b. After the product is assembled, the lower part of the support component 2 is supported on the cable 3b, and the cable 3b is suspended on the first tension spring 4 and the second tension spring 5, so it is equivalent to that the lower part of the support component 2 is suspended inside the backrest frame 1 by a spring. When the user's waist is supported on the support component 2, the support component 2 can float adaptively with the thrust or deadweight of the human back, and form an elastic support, which is more comfortable.

[0032] For example Figure 2 , 3 As shown, the cable 3b is connected with a suspended guide sleeve 3c and two groups of fixed guide sleeves 3d that are slidably matched therewith, and the two groups of fixed guide sleeves 3d are fixedly installed at the lower end of the rear side of the support assembly 2. The backrest frame 1 is fixedly provided with a hanging piece 6 at the position corresponding to the first tension spring 4 and the second tension spring 5. The hanging piece 6 is provided with a connecting hole 6a. The suspended guide sleeve 3c is provided with a first hanging seat 3f. The end of the cable 3b away from the cable motor 3a is provided with a second hanging seat 3e. One end of the first tension spring 4 is hung on the first hanging seat 3f, and the other end is hung on the corresponding hanging piece 6. One end of the second tension spring 5 is hung on the second hanging seat 3e, and the other end is hung on the corresponding hanging piece 6. With such a design, the support position of the lumbar support in the thickness direction of the backrest can be adjusted, that is, the cable motor 3a drives the cable 3b to contract or release, so that the support assembly 2 moves along the thickness direction of the backrest. In this embodiment, the cable motor 3a is an existing mature component, and its working principle is not further described here.

[0033] For example Figure 1 , 4 As shown, the cable motor 3a is fixedly assembled on the side of the backrest frame 1. In order to be able to convert the cable 3b from vertical to horizontal, a first straight hole a and a second straight hole b that are perpendicular to each other are provided in the suspended guide sleeve 3c, and an arc hole c is transitionally connected between the first straight hole a and the second straight hole b.

[0034] For example Figure 2 , 3As shown, this embodiment provides an implementation structure in which a support component 2 is rotatably connected to a spring steel wire 8, specifically: the support component 2 has two guide steel wires 2c arranged along the height direction of the backrest frame 1, a transverse steel wire 2d is integrally connected between the lower ends of the two guide steel wires 2c, and the upper ends of the two guide steel wires 2c are rotatably connected to the spring steel wire 8.

[0035] In order to be able to adjust the lumbar support in the Z direction, the support assembly 2 is built with a support body 2a and a Z-direction driving mechanism 2b, wherein the two ends of the rear side of the support body 2a are slidably assembled on two guide steel wires 2c, and the Z-direction driving mechanism 2b includes a screw rod 2b1, a nut sleeve 2b2 threadedly mounted on the screw rod 2b1, and a motor 2b3 for driving the nut sleeve 2b2 to rotate, and the motor 2b3 is fixed on the rear side of the support body 2a, and the upper and lower ends of the screw rod 2b1 are respectively connected to the spring steel wire 8 and the transverse steel wire 2d. Based on this structural arrangement, the motor 2b3 can drive the support body 2a to move along the height direction of the backrest when it is working, thereby realizing the Z-direction adjustment of the lumbar support.

[0036] In order to ensure the reliability of the Z-axis drive mechanism 2b, the screw rod 2b1 should remain in a non-rotating state when the support body 2a moves up and down. At the same time, since the support assembly 2 provided in this embodiment needs to rotate relative to the spring steel wire 8, in this embodiment, the upper end of the screw rod 2b1 is hung on the spring steel wire 8 through a hook d, and the lower end is fixedly connected to the transverse steel wire 2d. This design ensures that the screw rod 2b1 does not rotate on its own and can rotate relative to the spring steel wire 8.

[0037] For example Figure 2 , 3 As shown, a support plate 2e is provided on the front side of the support body 2a. The support plate 2e is elastic, and its upper end is rotatably connected to the spring steel wire 8. There is no restriction on the lower end of the support plate 2e. When the Z-direction driving mechanism 2b is working, the front side of the support body 2a slides relative to the rear surface of the support plate 2e. The area of ​​the support plate 2e is larger than the support body 2a. Due to its elasticity, the support plate 2e can form a flexible support for the waist of the driver and passenger, which is more comfortable.

[0038] To facilitate assembly, a hanging structure 2f protruding backward is provided at the upper end of the support plate 2e. The hanging structure 2f has a hanging groove 2f1 opening downward, and an elastic tongue 2f2 is provided on the side of the hanging groove 2f1. After the hanging groove 2f1 is hung on the spring steel wire 8, the elastic tongue 2f2 can prevent the support plate 2e from falling off.

[0039] For example Figure 3 As shown, in order to ensure the stability of the two groups of fixed guide sleeves 3d installed at the lower end of the rear side of the support assembly 2, a retaining rod 7 is fixedly connected between the two groups of fixed guide sleeves 3d.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A four-way lumbar support driven by cable traction. It is characterized in that include: A backrest frame (1), wherein a spring steel wire (8) is horizontally arranged in the middle of the backrest frame (1); A support assembly (2) located inside the backrest frame (1), the upper end of the support assembly (2) being rotatably connected to the spring steel wire (8), the support assembly (2) comprising a support body (2a), a support plate (2e) located at the front side of the support body (2a), and a Z-direction drive mechanism (2b) for driving the support body (2a) to move along the height direction of the backrest frame (1), the support plate (2e) being elastic, the upper end of which is rotatably connected to the spring steel wire (8), and the lower end of the support plate (2e) being able to move freely; An X-direction driving mechanism (3), comprising a cable (3b) and a cable motor (3a) for controlling the movement of the cable (3b), wherein the cable (3b) is supported at the rear lower end of the support assembly (2), and the cable motor (3a) is capable of driving the support assembly (2) to move along the thickness direction of the backrest frame (1); and A first tension spring (4) and a second tension spring (5) are respectively connected to the two ends of the backrest frame (1); the ends of the first tension spring (4) and the second tension spring (5) away from the backrest frame (1) are both connected to the cable (3b); the cable (3b) is connected to a suspended guide sleeve (3c) and two groups of fixed guide sleeves (3d) which are slidably matched with the cable; the two groups of fixed guide sleeves (3d) are fixedly mounted on the rear lower end of the support assembly (2); and the end of the first tension spring (4) away from the backrest frame (1) is hung on the suspended guide sleeve (3c).

2. The cable-driven four-way lumbar support according to claim 1, Features: The backrest frame (1) is fixedly provided with a hanging piece (6) at positions corresponding to the first tension spring (4) and the second tension spring (5), and the hanging piece (6) is provided with a connecting hole (6a). The suspended guide sleeve (3c) is provided with a first hanging seat (3f), and the cable (3b) is provided with a second hanging seat (3e) at one end away from the cable motor (3a).

3. The cable-driven four-way lumbar support according to claim 1, Features: A retaining rod (7) is fixedly installed between the two groups of fixed guide sleeves (3d).

4. The cable-driven four-way lumbar support according to claim 1, Features: The cable motor (3a) is fixedly mounted on the side of the backrest frame (1), and a first straight hole (a) and a second straight hole (b) which are perpendicular to each other are provided in the suspended guide sleeve (3c), and an arc hole (c) is provided between the first straight hole (a) and the second straight hole (b) to form a transition connection.

5. The cable-driven four-way lumbar support according to claim 1, Features: The support assembly (2) comprises two guide steel wires (2c) arranged along the height direction of the backrest frame (1), a transverse steel wire (2d) is integrally connected between the lower ends of the two guide steel wires (2c), and the upper ends of the two guide steel wires (2c) are rotatably connected to the spring steel wire (8).

6. The cable-driven four-way lumbar support according to claim 5, Features: The two ends of the support body (2a) are slidably mounted on the two guide steel wires (2c); the Z-direction drive mechanism (2b) comprises a screw rod (2b1), a nut sleeve (2b2) ​​threadedly mounted on the screw rod (2b1), and a motor (2b3) for driving the nut sleeve (2b2) ​​to rotate; the motor (2b3) is fixed on the support body (2a); the upper end of the screw rod (2b1) is hung on the spring steel wire (8) through a hook (d), and the lower end is fixedly connected to the transverse steel wire (2d).

7. The cable-driven four-way lumbar support according to claim 1, Features: The support assembly (2) is provided with a support plate (2e) located at the front side of the support body (2a); the support plate (2e) is elastic, and the upper end of the support plate (2e) is rotatably connected to the spring steel wire (8).

8. The cable-driven four-way lumbar support according to claim 7, Features: The upper end of the support plate (2e) is provided with a hanging structure (2f) protruding backwards, the hanging structure (2f) has a hanging groove (2f1) opening downwards, and a side portion of the hanging groove (2f1) is provided with an elastic latch (2f2).

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