Massage net chair and its backrest assembly

Abstract

The present invention discloses a massage net chair and its backrest assembly, which includes a lumbar massage system and an adjustment assembly for adjusting the front-to-rear position of the lumbar massage system. The adjustment assembly includes a first holder, a second holder, a first link, and a second link. The second holder is fixed to the backrest frame, and the first holder is located in front of the second holder. One end of the first link is slidably connected to the second holder, and the other end of the first link is hingedly connected to the first holder. One end of the second link is hingedly connected to the second holder, and the other end of the second holder is slidably connected to the first holder. The first link and the second link are arranged crosswise and hingedly connected. The adjustment assembly further includes a drive member for moving the second holder and the first holder closer to or farther apart from each other. This allows the user to adjust the front-to-back position of the lumbar massage system adjustably attached to the backrest, thereby providing the user with a more comfortable massage experience from the chair.

Description

[Technical Field]

[0001] The present invention relates to the field of massage chairs, and more particularly to a massage net chair and its backrest assembly. [Background technology]

[0002] With the development of social economy, people are facing increasing pressure from work and working longer hours. As one of the furniture that people usually come into contact with for a long time, the chair at work has a great impact on human health.

[0003] Patent Document 1 discloses a massage chair for work, including a backrest, a seat, and legs. A massage device is installed inside the backrest. The massage devices include a cervical massage device, a shoulder massage device, and a lumbar massage device. The cervical massage device uses a fixed single-head massage system, the shoulder massage device uses a mobile massage system, and the lumbar massage device uses a fixed dual-head massage system. The lumbar massage device includes a lumbar massage head and a lumbar motor. The lumbar massage head is a dual-head massage system vertically positioned below the backrest. The lumbar massage head uses a fixed dual-head massage system, with two massage heads, one higher and the other lower, creating a 3D massage effect and massaging both sides of the lumbar vertebrae through cyclic rotation. When a user sits in a massage chair, the line from the user's back to their buttocks is curved, but the user's lower back often protrudes forward. Because each user has a different body shape, when different users use the same massage chair, not all users' lumbar regions can fit into the lumbar massage device, and the comfort of the chair varies from person to person, which reduces the chair's usage experience and user demographic. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Chinese Utility Model No. 209031574 Summary of the Invention [Problem to be solved by the invention]

[0005] In order to solve the problems in the prior art, the object of the present invention is to provide a massage net chair and its backrest assembly in which the user can adjust the front and rear position of the lumbar massage system adjustably attached to the backrest, so that the lumbar massage system can provide effective support to more users, provide appropriate massage force, broaden the user base of the chair, and provide a more comfortable massage experience. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention employs the following technical means. The backrest assembly includes a backrest frame and a lumbar massage assembly attached to the backrest frame and including a lumbar massage system. The lumbar massage assembly further includes an adjustment assembly for adjusting the fore-aft position of the lumbar massage system. The adjustment assembly includes a first holder, a second holder, a first link, a second link, and a third holder. The second holder is fixed to the backrest frame, and the first holder is located forward of the second holder. One end of the first link is hingedly connected to the third holder, and the other end of the first link is hingedly connected to the first holder. One end of the second link is hingedly connected to the second holder, and the other end of the second link is slidingly connected to the first holder. The first link and the second link are arranged crossing each other, and the first link is hingedly connected to the second link. The third holder is slidably connected to the second holder, and the lower back massage system is attached to the first holder. The adjustment assembly further includes a drive member for slidingly driving the third holder on the second holder. When the third holder slides, the first holder can be driven to move back and forth via the first link and the second link.

[0007] Preferably, the lumbar massage assembly further includes a housing. The adjustment assembly is attached to the backrest frame via the housing. The housing is provided with a movable cavity that opens to the front. The housing is fixedly connected to the backrest frame. The second holder is located within the movable cavity. The second holder is fixedly connected to the housing.

[0008] Preferably, the upper portion of the backrest frame and the leading edge of the housing are covered with a tension net, and a support fabric including a heating layer is attached to the housing.

[0009] Preferably, the drive member includes a pull wire for slidingly driving the third holder, one end of the pull wire being connected to the third holder and the other end of the pull wire being tensilely attached to the housing.

[0010] Preferably, the drive member further includes a reset member for driving the reset of the third holder.

[0011] Preferably, the drive member includes a drive motor, a second nut is fixed to the third holder, the second nut is threadably connected to the screw, and the drive motor is drivingly connected to the screw.

[0012] Preferably, the backrest frame has a frame structure, and the rear portion of the housing projects rearward and penetrates through a middle portion of the backrest frame.

[0013] Preferably, the backrest assembly further includes a battery box attached to the housing, in which a battery for supplying power to the lumbar massage system is installed, and the battery box includes a battery rack that is slidably mounted to the housing for placing the battery thereon.

[0014] Preferably, the lumbar massage system includes a massage ball with a heating function.

[0015] A massage net chair includes the backrest assembly described above. [Effects of the Invention]

[0016] The beneficial effects of the technical means of the present invention are as follows: By adjusting the front-to-back position of the lumbar massage system, the lumbar massage system can better support the user's lower back and alleviate lower back pain caused by sitting for long periods of time. Also, by changing the position of the lumbar massage system, it can provide appropriate massage force to suit different users and provide a more comfortable massage experience to more users. [Brief explanation of the drawings]

[0017] [Figure 1]FIG. 1 is a structural schematic diagram of the backrest assembly in the present invention. [Figure 2] FIG. 2 is a structural schematic diagram of the lumbar massage assembly. [Figure 3] FIG. 3 is a structural schematic diagram 1 of the adjustment assembly. [Figure 4] FIG. 4 is a structural schematic diagram 2 of the adjustment assembly. [Figure 5] FIG. 5 is a structural schematic diagram of the first link. [Figure 6] FIG. 6 is a structural schematic diagram of the second holder. [Figure 7] FIG. 7 is a structural schematic diagram of the third holder. [Figure 8] FIG. 8 is a schematic diagram of the structure of the first holder. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, embodiments of the present invention will be described in detail. Examples of the embodiments are shown in the drawings. Throughout the drawings, the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are illustrative for explaining the present invention and should not be understood as limitations on the present invention.

[0019] In describing the present invention, orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," "counterclockwise," and the like are orientations or positional relationships based on the drawings and are intended merely to facilitate and simplify the description of the present invention, and do not indicate or imply that the referred devices or elements must have a particular orientation or be configured and operated in a particular orientation, and therefore should not be understood as limitations on the present invention.

[0020] Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or the number of technical features shown. Thus, a feature qualified by "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more unless otherwise limited.

[0021] In the present invention, unless otherwise clearly specified or limited, the terms "attached," "coupled," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to a fixed connection, a detachable connection, or an integral connection. They may refer to a mechanical connection or an electrical connection. They may be directly connected, indirectly connected via an intermediate medium, or an internal connection between two elements. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0022] In the present invention, unless otherwise clearly specified or limited, a first feature being located "above" or "below" a second feature may include direct contact between the first and second features, or may include contact between the first and second features not directly but via another feature between them. Furthermore, a first feature being located "above," "above," and "on the upper surface" of a second feature may include the first feature being located directly above and diagonally above the second feature, or simply indicate that the horizontal height of the first feature is higher than that of the second feature. A first feature being located "below," "below," and "on the lower surface" of a second feature may include the first feature being located directly below and diagonally below the second feature, or simply indicate that the horizontal height of the first feature is lower than that of the second feature.

[0023] The front, back, left and right directions described in the following examples correspond to the front, back, left and right directions of a chair product, with the back of the chair being the rear and the opposite side of the chair back being the front, and the left and right being determined by this front and back.

[0024] (Example) The backrest assembly shown in FIG. 1 includes a backrest frame 1, a lumbar massage assembly attached to the backrest frame 1 and including a lumbar massage system 3, and an adjustment assembly 4 for adjusting the front-to-rear position of the lumbar massage system 3. As shown in FIGS. 2, 3, and 4, the adjustment assembly 4 includes a first holder 41, a second holder 42, a first link 43, and a second link 44. The second holder 42 is fixed to the backrest frame 1, and the first holder 41 is located in front of the second holder 42. One end of the first link 43 is slidably connected to the second holder 42, and the other end of the first link 43 is hingedly connected to the first holder 41. One end of the second link 44 is hingedly connected to the second holder 42, and the other end of the second link 44 is slidably connected to the first holder 41. The first link 43 and the second link 44 are provided so as to intersect with each other and can be hingedly connected at the intersection thereof, thereby enabling the first link 43 and the second link 44 to move synchronously. A third holder 45 is slidably connected to the second holder 42. The third holder 45 is hingedly connected to the first link 43. The lower back massage system 3 is attached to the first holder 41. The adjustment assembly 4 further includes a drive member 5 for slidingly driving the third holder 45 on the second holder 42. When the third holder 45 slides, the first holder 41 can be driven to move back and forth via the first link 43 and the second link 44.

[0025] The process for adjusting the front-to-rear position of the lumbar massage system 3 is as follows: The third holder 45 is driven to slide on the second holder 42, and the third holder 45 drives the first link 43 hingedly connected to it. The first link 43 drives the first holder 41 to move away from or approach the second holder 42, and then the lumbar massage system 3 is brought into contact with the user's lumbar region. In this way, adjusting the front-to-rear position of the lumbar massage system 3 allows the lumbar massage system 3 to better support the user's lumbar region and alleviate lower back pain caused by sitting for long periods of time. Furthermore, changing the position of the lumbar massage system 3 can provide appropriate massage force to suit various users, providing a more comfortable massage experience for more users.

[0026] To stabilize the driving process, in this embodiment, as shown in FIG. 5, there are two second links 44. The two second links 44 are arranged in parallel. The first holder 41 is located between the two second links 44. The two second links 44 are fixedly connected via a third link 46. Therefore, both the upper and lower ends of the first holder 41 are subjected to force, and the force is equal, which stabilizes the adjustment process. As shown in FIG. 8, the first holder 41 includes a first connecting portion 411 and a second connecting portion 412 protruding forward. There are two first connecting portions 411, one above the other. There are also two second connecting portions 412, one above the other. The first connecting portion 411 is located to the left of the second connecting portion 412, and each first connecting portion 411 has a first slide hole 4111. As shown in FIG. 6, the second holder 42 includes a third connection portion 421 and a fourth connection portion 422 protruding forward. There are two third connection portions 421, which are arranged vertically. There are two fourth connection portions 422, which are arranged vertically. The third connection portion 421 is located to the left of the fourth connection portion 422. A second slide hole 4211 opens in the second connection portion 421, and a third slide hole 423 opens in the second holder 42. As shown in FIG. 7, the third holder 45 includes two fifth connection portions 451 protruding forward. The fifth connection portions 451 are arranged vertically. As shown in Figures 2 to 4, in the adjustment assembly 4, the third holder 45 is located between the third connection portion 421 and the fourth connection portion 422 of the second holder 42, the two third connection portions 421 of the second holder 42 are located between the two fifth connection portions 451 of the third holder 45, the rear ends of the two first links 43 are located between the two third connection portions 421 of the second holder 42, and the third link 46 is located between the two third connection portions 421 of the second holder 42, and the first link 43 and the adjacent fifth connection portion 451 of the third holder 45 are hingedly connected via the first hinge axis.The first hinge shaft slides through a second sliding hole 4211 that opens into the third connecting portion 421 of the second holder 42, thereby slidingly connecting the first link 43 to the second holder 42. A limiting post is fixed to the third holder 45. The limiting post passes through the third sliding hole 423 of the second holder 42, thereby restricting the third holder 45 to move only left and right. The tip of the first link 43 is hingedly connected to the second connecting portion 412 of the first holder 41 via the second hinge shaft. In this embodiment, there are two second links 44, and the two second links 44 are located between the fourth connecting portions 422 of the second holder 42. The rear end of each second link 44 is hingedly connected to the fourth connecting portion 422 of the adjacent second holder 42 via the third hinge shaft. A fourth hinge shaft is attached to the front end of the second link 44. The fourth hinge shaft passes through a first sliding hole 4111 of a first connecting portion 411 on the first holder 41, thereby slidingly connecting the second link 44 and the first holder 41.

[0027] To facilitate the installation of the backrest and lumbar massage assembly, in this embodiment, as shown in FIGS. 1 and 2, the backrest frame 1 has a frame structure, and the lumbar massage assembly further includes a housing 2, the rear portion of which protrudes and penetrates the backrest frame 1. The housing 2 has a movable cavity that opens forward. The second holder 42 is fixed to the rear end wall of the movable cavity. This allows the backrest structure to be neat and compact, allowing the lumbar massage system 3 to have a larger movable space.

[0028] In this embodiment, as shown in FIGS. 1 to 4, to facilitate the adjustment process, the driving member includes a traction wire 54 for slidingly driving the third holder 45. One end of the traction wire 54 is connected to an eighth connection portion 452 protruding from the third holder 45, and the other end of the traction wire 54 is connected to the backrest frame 1. Pulling the traction wire 54 adjusts the distance between the second holder 42 and the first holder 41 via the third holder 45, the first link 43, and the second link 44. In this way, the flexible wire allows for better wiring, simplifies the structure of the backrest, and facilitates installation, inspection, and maintenance. Furthermore, a mounting seat 51 is fixed to the housing 2. A bolt 52 is rotatably attached to the mounting seat 51. A first nut 53 is threaded onto the bolt 52. The first nut 53 slides into the mounting seat 51, and the other end of the traction wire 54 is fixed to the first nut 53. Therefore, by manually and precisely adjusting the position of the massage system, most users can find the appropriate massage position and massage force. Furthermore, as shown in FIGS. 3 and 4, a sixth connector 521 protrudes from the end of the bolt 52, penetrating the mounting seat 51. A handle 56 is fixedly attached to the sixth connector 521, making adjustment easier. The driving member further includes a return spring 72. One end of the return spring 72 is connected to the first holder 41, and the other end of the return spring 72 is connected to a fourth holder 71 fixed to the inner wall of the housing 2. In another embodiment, the other end of the return spring 72 may be connected to a second or third holder. This automatically resets the second mounting seat 51. Furthermore, there are two return springs 72, one on the left and one on the right. A seventh connecting portion 413 protrudes from each of the left and right ends of the first holder 41. The leading end of the return spring 72 is connected to the seventh connecting portion 413, and the rear end of the return spring 72 is connected to the fourth holder 71 fixed to the backrest frame 1. Therefore, the first holder 41 receives a uniform force during return, allowing for stable movement.Furthermore, a hose 55 is fitted around the pulling wire 54. One end of the hose 55 is fixedly connected to the mounting seat, and the other end of the hose is hingedly connected to one end of the second holder near the fourth connecting portion, thereby protecting the pulling wire and extending its service life.

[0029] In another embodiment, the driving member includes a second nut, a screw, a drive motor, and a switch for controlling and driving the drive motor. The second nut is fixed to a third holder 45, the screw is threadedly connected to the first nut, and the drive motor is attached to the housing or the second holder 42. The output end of the drive motor is fixedly connected to one end of the screw, which rotates the screw. Rotating the screw moves the second holder 42 left and right, thereby adjusting the forward and backward position of the lumbar massage system. The switch is attached to the outside of the housing and is electrically connected to the drive motor. In this way, when adjusting the position of the lumbar massage system, pressing the switch controls the output of the drive motor to control the forward or reverse rotation of the screw, thereby achieving the purpose of adjusting the forward and backward position of the lumbar massage system. This makes the chair easier to control and the adjustment more accurate.

[0030] In another embodiment, the driving member may be an electric cylinder, the cylinder body of which may be attached to the rear housing of the second holder, and the telescopic end of the electric cylinder may be connected to the third holder 45, so that the forward and backward position of the lumbar massage system can be adjusted by controlling the electric cylinder.

[0031] In this embodiment, as shown in FIGS. 1, 2, and 3, the lumbar massage assembly further includes a battery box attached to the backrest. A battery for supplying power to the lumbar massage system 3 is installed inside the battery box, allowing the chair to be moved and massage services to be provided at any time. The battery box further includes a mounting frame 61 and a battery rack 62 for mounting the battery. The mounting frame 61 is fixed inside the housing 2. The mounting frame 61 is located below the adjustment assembly 4. The battery rack is slidably attached to the mounting frame 61. An opening communicating with the interior of the housing is formed at the rear side. The opening is located behind the battery rack 62 and allows the battery rack 62 to slide on the backrest frame 1. During inspection, the battery rack 62 can be removed from the housing through the opening in the housing 2, facilitating inspection.

[0032] The massage net chair includes the above-mentioned backrest assembly. Here, the frame-type backrest frame includes a middle section and an upper section. The middle section of the backrest frame is a lumbar support section. The rear end of the housing passes through the lumbar support section. The upper section is a backrest section, and the backrest section is covered with a tension net. A support fabric that can cover the tip of the movable cavity is attached to the housing. When sitting on the net chair, the support fabric supports the user's lower back. The massage head of the lower back massage system 3 presses the support fabric to massage the lower back.

[0033] In this embodiment, the support fabric includes a heating layer and an elastic base layer. The base layer can be made of various materials, such as tension mesh or elastic fabric. The heating layer can be made of heating yarn, graphene, or other heat-generating materials. By supplying power to the heating layer from the power source, the heat emitted from the heating layer can heat the entire lower back of the user, improving the comfort of the net chair.

[0034] In this embodiment, the massage balls of the lumbar massage system have a heating function. In this way, when using the net chair, the lumbar massage system can selectively heat the massage area, thereby further improving the massage effect of the net chair and providing a better experience for the user. The massage balls of the lumbar massage system can be equipped with an atmosphere lamp to further improve the user's experience.

[0035] In the description herein, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, general references to the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0036] Although the embodiments of the present invention have been shown and described above, the above-described embodiments are illustrative and should not be understood as limitations on the present invention. Those skilled in the art may change, modify, substitute, and alter the above-described embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. [Explanation of symbols]

[0037] 1 Backrest frame 2. Housing 3 Lumbar massage system 4 Adjustment Assembly 41 First Holder 411 First Connection 4111 First slide hole 412 Second Connection 413 Seventh Junction 42 Second Holder 421 Third Junction 4211 Second slide hole 422 Fourth Junction 423 Third Slide 43 First Link 44 Second Link 45 Third Holder 451 Fifth Junction 452 8th Junction 46 Third Link 5 Driving member 51 Mounting seat 52 volts 53 First Nut 54 Towing wire 55 Hose 56 Handle 61 Mounting frame 62 Battery Rack 71 Fourth Holder 72 Return spring

Claims

1. A backrest assembly including a backrest frame (1) and a lumbar massage assembly attached to the backrest frame (1) and including a lumbar massage system, The lumbar massage assembly further includes an adjustment assembly (4) for adjusting the front-rear position of the lumbar massage system (3), and the adjustment assembly (4) includes a first holder (41), a second holder (42), a first link (43), a second link (44), and a third holder (45), wherein the second holder (42) is fixed to the backrest frame (1), the first holder (41) is located in front of the second holder (42), one end of the first link (43) is hingedly connected to the third holder (45), the other end of the first link (43) is hingedly connected to the first holder (41), one end of the second link (44) is hingedly connected to the second holder (42), and the second link (45) is hingedly connected to the third holder (45). the other end of the third holder (44) is slidably connected to a first holder (41), the first link (43) and the second link (44) are arranged crossing each other, the first link (43) is hingedly connected to the second link (44), the third holder (45) is slidably connected to the second holder (42), the lower back massage system (3) is attached to the first holder (41), the adjustment assembly (4) further includes a drive member (5) for slidingly driving the third holder (45) on the second holder (42), and when the third holder (45) slides, the first holder (41) can be driven to move forward and backward via the first link (43) and the second link (44).

2. 2. The backrest assembly of claim 1, wherein the lumbar massage assembly further includes a housing (2), the adjustment assembly (4) is attached to the backrest frame (1) via the housing (2), the housing (2) is provided with a movable cavity that opens forward, the housing (2) is fixedly connected to the backrest frame (1), the second holder (42) is located within the movable cavity, and the second holder (42) is fixedly connected to the housing (2).

3. 3. The backrest assembly according to claim 2, wherein the upper part of the backrest frame (1) and the tip of the housing (2) are covered with a tension net, and a support fabric including a heating layer is attached to the housing (2).

4. 3. The backrest assembly according to claim 2, wherein the drive member (5) includes a traction wire (54) for slidingly driving the third holder (45), one end of the traction wire (54) being connected to the third holder (45) and the other end of the traction wire (54) being attached to the housing (2) in a tensile manner.

5. 5. The backrest assembly according to claim 4, characterized in that the drive member (5) further comprises a reset member for driving the reset of the third holder (45).

6. 3. The backrest assembly according to claim 2, characterized in that the drive member (5) includes a drive motor, a second nut fixed to the third holder (45), the second nut being threadably connected to the screw, and the drive motor being drivingly connected to the screw.

7. 3. The backrest assembly according to claim 2, wherein the backrest frame (1) is a frame structure, and the rear portion of the housing (2) protrudes rearward and penetrates through the middle portion of the backrest frame (1).

8. 3. The backrest assembly according to claim 2, further comprising a battery box attached to the housing (2), in which a battery for supplying power to the lumbar massage system (3) is installed, and the battery box includes a battery rack (62) that is slidably mounted to the housing (2) for placing the battery.

9. 2. The backrest assembly according to claim 1, characterized in that the lumbar massage system (3) includes a massage ball with heating function.

10. A massage net chair comprising a backrest assembly according to any one of claims 1 to 9.

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