Backrest assembly and backrest cushion

Abstract

The invention provides a backrest assembly and a backrest cushion. The backrest assembly comprises a backrest cushion body and a first massage module. The backrest cushion main body comprises a first main body part and a second main body part, the second main body part is connected to the first main body part, a leaning space is formed between the second main body part and the first main body part, and the leaning space is used for a user to lean on; the first massage module is located in the leaning space; the first massage module comprises a first supporting seat and a first massage piece; the first supporting seat is connected to the first main body part, the first supporting seat is provided with a first massage area, and the first massage part is arranged relative to the first massage area and is used for massaging a user in the leaning space, so that the first massage part can massage the user; therefore, the backrest cushion main body integrates a leaning function and a massage function through the first massage module, the massage effect of the backrest cushion main body is achieved, the situation that the backrest cushion main body only has the leaning function is avoided, and the functionality of the backrest assembly is enriched.

Description

Technical Field

[0001] The invention relates to the technical field of backrest cushions, and in particular to a backrest assembly and a backrest cushion. Background Art

[0002] With the development of science and technology, back cushions are used in people's lives. Back cushions are used to adjust the contact point between the human body and the seat to obtain a more comfortable angle to reduce user fatigue.

[0003] In the prior art, the existing back cushion includes a back cushion body, which is used for users to lean on; the back cushion body is provided with at least one contact portion, which is used for users to contact, but the back cushion body cannot perform massage and only has a leaning function, resulting in poor functionality of the existing back cushion. Summary of the invention

[0004] The object of the present invention is to provide a backrest assembly and a backrest cushion, the backrest cushion main body comprises a first main body part and a second main body part, the second main body part is connected to the first main body part, a leaning space is formed between the second main body part and the first main body part, and the leaning space is used for a user to lean on; a first massage module is in the leaning space; the first massage module comprises a first support seat and a first massage piece; the first support seat is connected to the first main body part, the first support seat is provided with a first massage area, the first massage piece is arranged relative to the first massage area, and massages the user in the leaning space, so that the first massage piece massages the user, so that the backrest cushion main body integrates the leaning function and the massage function through the first massage module, realizes the massage effect of the backrest cushion main body, avoids the backrest cushion main body having only the leaning function, and enriches the functionality of the backrest assembly.

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

[0006] A backrest assembly, applied to a backrest cushion, comprising:

[0007] The backrest cushion body comprises a first main body part and a second main body part, wherein the second main body part is connected to the first main body part, and a leaning space is formed between the second main body part and the first main body part, and the leaning space is used for a user to lean on;

[0008] The first massage module is located in the leaning space; the first massage module includes a first support seat and a first massage member; the first support seat is connected to the first main body, the first support seat is provided with a first massage area, the first massage member is arranged relative to the first massage area, and massages the user in the leaning space.

[0009] Optionally, the first main body portion is located above the second main body portion and is used to support the back of a user; the first main body portion extends along an arc direction to support different positions of the user's back.

[0010] Optionally, the first massage element is at least one of a red light emitting element, a vibrating massage element, and a heating massage element.

[0011] Optionally, there are multiple first massage areas, and the multiple first massage areas are distributed at different positions of the first support seat;

[0012] Each of the first massage areas matches the corresponding first massage element.

[0013] Optionally, a first function integration area is formed between the plurality of first massage areas, and the first function integration area is arranged at different positions relative to the user's back.

[0014] Optionally, the backrest assembly also includes a second massage module, which is located in the leaning space; the second massage module includes a second support seat and a second massage piece; the second support seat is connected to the second main body, the second support seat is provided with a second massage area, the second massage piece is arranged relative to the second massage area, and massages the user in the leaning space.

[0015] Optionally, the second main body portion is located below the first main body portion, the second main body portion extends along the front-to-back direction and is used to support the user's buttocks; the second main body portion extends along an arc direction to support different positions of the user's buttocks.

[0016] Optionally, the second massage element is at least one of a red light emitting element, a vibrating massage element, and a heating massage element.

[0017] Optionally, the second massage area has multiple second massage areas, and the multiple second massage areas are distributed at different positions of the second support seat;

[0018] Each of the second massage areas matches the corresponding second massage element;

[0019] A second function integration area is formed between the plurality of the second massage areas, and the second function integration area is arranged at different positions relative to the buttocks of the user.

[0020] A backrest cushion comprises the backrest assembly.

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

[0022] The present invention provides a backrest assembly and a backrest cushion, wherein the backrest cushion main body comprises a first main body part and a second main body part, the second main body part is connected to the first main body part, a leaning space is formed between the second main body part and the first main body part, and the leaning space is used for a user to lean on; a first massage module is in the leaning space; the first massage module comprises a first support seat and a first massage piece; the first support seat is connected to the first main body part, the first support seat is provided with a first massage area, the first massage piece is arranged relative to the first massage area, and massages the user in the leaning space, so that the first massage piece massages the user, thereby facilitating the backrest cushion main body to integrate the leaning function and the massage function through the first massage module, thereby achieving the massage effect of the backrest cushion main body, avoiding the backrest cushion main body having only the leaning function, and enriching the functionality of the backrest assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0024] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0025] Figure 1 A schematic diagram of a backrest assembly according to the invention of the present application is shown.

[0026] Figure 2 A schematic diagram showing a backrest pad body of a backrest assembly according to the invention of the present application is shown.

[0027] Figure 3 A schematic diagram of a first massage module of a backrest assembly according to the invention of the present application is shown.

[0028] Figure 4 A cross-sectional view showing that the first massage module of the backrest assembly according to the invention of the present application is a red light emitting member.

[0029] Figure 5 A cross-sectional view showing that the first massage module of the backrest assembly according to the invention of the present application is a vibration massage element.

[0030] Figure 6 A cross-sectional view showing that the first massage module of the backrest assembly according to the invention of the present application is a heat-generating massage element.

[0031] Figure 7 A schematic diagram of a second massage module of a backrest assembly according to the invention of the present application is shown.

[0032] Figure 8 A cross-sectional view showing that the second massage module of the backrest assembly according to the invention of the present application is a red light emitting member.

[0033] Fig. 9 A cross-sectional view showing that the second massage module of the backrest assembly according to the invention of the present application is a vibration massage element.

[0034] Fig.10 A cross-sectional view showing that the second massage module of the backrest assembly according to the invention of the present application is a heat-generating massage element.

[0035] Reference numerals

[0036] 100. Backrest assembly;

[0037] 10. Back cushion body; 10a. Leaning space; 11. First body part; 12. Second body part;

[0038] 20. First massage module; 21. First support seat; 211. First massage area; 2111. First function integration area; 22. First massage member; 221. First red light member; 222. First mounting portion; 223. First lens portion; 224. First circuit board; 225. First vibration member; 226. First elastic portion; 227. First heating member;

[0039] 30. Second massage module; 31. Second support seat; 311. Second massage area; 3111. Second function integration area; 32. Second massage element; 321. Second red light element; 322. Second mounting portion; 323. Second lens portion; 324. Second circuit board; 325. Second vibration element; 326. Second elastic portion; 327. Second heating element. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0041] Please refer to the attached Figures 1-2 The embodiment of the present application provides a backrest assembly 100, which is applied to a backrest cushion, and the backrest assembly 100 is used to lean on and massage a user.

[0042] Please refer to the attached Figures 1-2In the embodiment of the present application, the backrest assembly 100 includes a backrest cushion body 10 and a first massage module 20; the first massage module 20 is arranged on the inner side of the backrest cushion body 10, the backrest cushion body 10 includes a first main body part 11 and a second main body part 12, the second main body part 12 is connected to the first main body part 11, and a leaning space 10a is formed between the second main body part 12 and the first main body part 11, and the leaning space 10a is used for the user to lean on; the first massage module 20 is in the leaning space 10a; the first massage module 20 includes a first support seat 21 and a first Massage piece 22; the first support seat 21 is connected to the first main body 11, the first support seat 21 is provided with a first massage area 211, the first massage piece 22 is arranged relative to the first massage area 211, and massages the user in the leaning space 10a, so that the first massage piece 22 can massage the user, thereby facilitating the backrest cushion body 10 to integrate the leaning function and the massage function through the first massage module 20, thereby realizing the massage effect of the backrest cushion body 10, avoiding the backrest cushion body 10 having only the leaning function, and enriching the functionality of the backrest assembly 100.

[0043] Please refer to the attached Figures 1-2 In the embodiment of the present application, the backrest cushion body 10 serves as a supporting component of the backrest assembly 100 , and the backrest cushion body 10 is used to support the first massage module 20 and the second massage module 30 .

[0044] Please refer to the attached Figures 1-2 At this time, the backrest cushion body 10 includes a first main body part 11 and a second main body part 12. The second main body part 12 is connected to the first main body part 11 so that the second main body part 12 is fixed to the first main body part 11. A leaning space 10a is formed between the second main body part 12 and the first main body part 11. The leaning space 10a is used for the user to lean on, so that the user can enter the leaning space 10a, thereby facilitating the inner side wall of the leaning space 10a to lean on different positions of the user; so as to obtain a more comfortable sitting posture to reduce the user's fatigue.

[0045] Please refer to the attached Figures 1 to 3 In the embodiment of the present application, the first massage module 20 is in the leaning space 10a; the first massage module 20 includes a first support seat 21 and a first massage member 22; the first support seat 21 is connected to the first main body 11, so that the first support seat 21 is fixed to the first main body 11, the first support seat 21 is provided with a first massage area 211, the first massage member 22 is arranged relative to the first massage area 211, and massages the user in the leaning space 10a, so that the first massage member 22 massages the user, so that the backrest cushion body 10 integrates the leaning function and the massage function through the first massage module 20, realizes the massage effect of the backrest cushion body 10, avoids the backrest cushion body 10 having only the leaning function, and enriches the functionality of the backrest assembly 100.

[0046] Please refer to the attached Figures 1 to 3 The first main body 11 is located above the second main body 12 and is used to support the user's back; the first main body 11 extends along the arc direction so that the contour of the first main body 11 is adapted to the user's back to support different positions of the user's back, so that the first main body 11 can massage different positions of the user's back through the first massage part 22, so that the first main body 11 can lean against and massage the user's back.

[0047] Please refer to the attached Figures 1 to 6 The first massage part 22 is at least one of a red light emitting part, a vibration massage part, and a heating massage part, so that the first massage part 22 performs red light massage, vibration massage, or heating massage on the back of the user.

[0048] Please refer to the attached Figure 4 When the first massage part 22 is a red light emitting part, the first massage part 22 is provided with a first red light part 221, which outputs red light. The first red light part 221 is used to irradiate the back of the user on whom the first main body 11 leans with red light, so that the first red light part 221 performs red light therapy massage on the user's back, thereby facilitating the first main body 11 to integrate the leaning function and the red light therapy massage function.

[0049] Please refer to the attached Figure 4 The first massage member 22 is provided with a first mounting portion 222 and a first lens portion 223; the first mounting portion 222 is mounted on the first support seat 21, so that the first mounting portion 222 is fixed to the first support seat 21, and supports the first red light member 221, so that the first red light member 221 is fixedly connected to the first support seat 21 through the first mounting portion 222, thereby ensuring the position accuracy of the first red light member 221; the first lens portion 223 is connected to the first mounting portion 222, so that the first lens portion 223 is fixed to the first mounting portion 222, and the first lens portion 223 is arranged relative to the light-emitting surface of the first red light member 221, so that the red light output from the light-emitting surface of the first red light member 221 is transmitted to the back of the user through the first lens portion 223, thereby facilitating the first lens portion 223 to converge the red light output from the light-emitting surface of the first red light member 221 on the back of the user.

[0050] Please refer to the attached Figure 4A first sealed space is formed between the first lens portion 223 and the first mounting portion 222, and the first red light component 221 is in the first sealed space, so that the first lens portion 223 and the first mounting portion 222 can wrap the first red light component 221, thereby facilitating the first red light component 221 to be protected by the outer surfaces of the first lens portion 223 and the first mounting portion 222, and the first red light component 221 is not in contact with the external environment, so that the first red light component 221 and the external environment can be arranged separately, preventing the first red light component 221 from being impacted by the external environment, ensuring the performance of the first red light component 221, and improving the life of the first red light component 221.

[0051] Please refer to the attached Figure 4 The first massage component 22 is provided with a first circuit board 224, and the first circuit board 224 is arranged on the rear side of the first red light component 221 and is built into the first support seat 21, so that the first circuit board 224 is fixed to the inner side of the first support seat 21; the first circuit board 224 and the first red light component 221 are electrically connected, so that the first circuit board 224 and the first red light component 221 are energized, so that the first circuit board 224 can control the first red light component 221 to be in an on state or a off state.

[0052] Please refer to the attached Figure 5 When the first massage member 22 is a vibration massage member, the first massage member 22 is provided with a first vibrating member 225 and a first elastic portion 226, the first elastic portion 226 is connected to the first support seat 21, the fixed end of the first vibrating member 225 is connected to the first support seat 21, the vibrating end of the first vibrating member 225 contacts the first elastic portion 226, and outputs a vibration force to the first elastic portion 226; the first vibrating member 225 is used to perform a vibration massage on the back of the user leaning against the first elastic portion 226, realizing the vibration massage function of the first main body 11, so that the first vibrating member 225 can perform a vibration massage on the back of the user, thereby facilitating the first main body 11 to integrate the leaning function and the vibration massage function.

[0053] Please refer to the attached Figure 6 When the first massage element 22 is a heating massage element, the first massage element 22 is provided with a first heating element 227, and the first heating element 227 is connected to the first support seat 21. The first heating element 227 is used to output heat to the back of the user leaning against the first main body 11, thereby realizing the heating massage function of the first main body 11, so that the first heating element 227 can heat and massage the back of the user, thereby facilitating the first main body 11 to integrate the leaning function and the heating massage function.

[0054] Please refer to the attached Figure 3There are multiple first massage areas 211, and the multiple first massage areas 211 are distributed at different positions of the first support seat 21; each first massage area 211 matches a corresponding first massage piece 22, and the massage area of ​​the first massage area 211 relative to the user's back is increased by arranging multiple first massage areas 211, thereby facilitating improving the massage effect of the first massage area 211 relative to the user's back. Optionally, the massage effects of the first massage pieces 22 matched with each first massage area 211 are the same, or the massage effects of the first massage pieces 22 matched with each first massage area 211 are different.

[0055] Please refer to the attached Figure 3 A first function integration area 2111 is formed between the multiple first massage areas 211, and the first function integration area 2111 is arranged relative to different positions of the user's back so that the first function integration area 2111 can massage different positions of the user's back.

[0056] Please refer to the attached Figure 7 In the embodiment of the present application, the backrest assembly 100 also includes a second massage module 30, which is located in the leaning space 10a; the second massage module 30 includes a second support seat 31 and a second massage member 32; the second support seat 31 is connected to the second main body 12, so that the second support seat 31 is fixed to the second main body 12, the second support seat 31 is provided with a second massage area 311, the second massage member 32 is arranged relative to the second massage area 311, and massages the user in the leaning space 10a, so that the second massage member 32 massages the user, so that the second main body 12 integrates the leaning function and the massage function through the second massage module 30, and further enriches the functionality of the backrest assembly 100.

[0057] Please refer to the attached Figure 1 and 7 The second main body 12 is located below the first main body 11, and the second main body 12 extends along the front-to-back direction and is used to support the user's buttocks; the second main body 12 extends along the arc direction so that the contour of the second main body 12 is adapted to the user's buttocks to support different positions of the user's buttocks, so that the second main body 12 can massage different positions of the user's buttocks through the second massage part 32, so that the second main body 12 can lean on and massage the user's buttocks.

[0058] The second massage component 32 is at least one of a red light emitting component, a vibration massage component, and a heating massage component, so that the second massage component 32 performs red light massage, vibration massage, or heating massage on the user's buttocks.

[0059] Please refer to the attached Figure 8When the second massage component 32 is a red light emitting component, the second massage component 32 is provided with a second red light component 321, which outputs red light. The second red light component 321 is used to irradiate the buttocks of the user on whom the second main body 12 leans with red light, so that the second red light component 321 can perform red light therapy massage on the user's buttocks, thereby facilitating the second main body 12 to integrate the leaning function and the red light therapy massage function.

[0060] Please refer to the attached Figure 8 The second massage member 32 is provided with a second mounting portion 322 and a second lens portion 323; the second mounting portion 322 is mounted on the second support seat 31 so that the second mounting portion 322 is fixed to the second support seat 31 and supports the second red light member 321 so that the second red light member 321 is fixedly connected to the second support seat 31 through the second mounting portion 322, thereby ensuring the position accuracy of the second red light member 321; the second lens portion 323 is connected to the second mounting portion 322 so that the second lens portion 323 is fixed to the second mounting portion 322, and the second lens portion 323 is arranged relative to the light-emitting surface of the second red light member 321 so that the red light output from the light-emitting surface of the second red light member 321 is transmitted to the user's buttocks through the second lens portion 323, thereby facilitating the second lens portion 323 to converge the red light output from the light-emitting surface of the second red light member 321 on the user's buttocks.

[0061] Please refer to the attached Figure 8 A second sealed space is formed between the second lens portion 323 and the second mounting portion 322, and the second red light component 321 is in the second sealed space, so that the second lens portion 323 and the second mounting portion 322 can wrap the second red light component 321, thereby facilitating the second red light component 321 to be protected by the outer surfaces of the second lens portion 323 and the second mounting portion 322, and the second red light component 321 is not in contact with the external environment, so that the second red light component 321 and the external environment can be arranged separately, preventing the second red light component 321 from being impacted by the external environment, ensuring the performance of the second red light component 321, and improving the life of the second red light component 321.

[0062] Please refer to the attached Figure 8 The second massage component 32 is provided with a second circuit board 324, and the second circuit board 324 is arranged on the rear side of the second red light component 321 and is built into the second support seat 31, so that the second circuit board 324 is fixed to the inner side of the second support seat 31; the second circuit board 324 and the second red light component 321 are electrically connected, so that the second circuit board 324 and the second red light component 321 are energized, so that the second circuit board 324 can control the second red light component 321 to be in an on state or a off state.

[0063] Please refer to the attached Fig. 9When the second massage member 32 is a vibration massage member, the second massage member 32 is provided with a second vibrating member 325 and a second elastic portion 326. The second elastic portion 326 is connected to the second support seat 31. The fixed end of the second vibrating member 325 is connected to the second support seat 31. The vibrating end of the second vibrating member 325 contacts the second elastic portion 326 and outputs a vibration force to the second elastic portion 326. The second vibrating member 325 is used to perform a vibration massage on the buttocks of the user leaning against the second elastic portion 326, thereby realizing the vibration massage function of the second main body 12, so that the second vibrating member 325 can perform a vibration massage on the buttocks of the user, thereby facilitating the second main body 12 to integrate the leaning function and the vibration massage function.

[0064] Please refer to the attached Fig.10 When the second massage element 32 is a heating massage element, the second massage element 32 is provided with a second heating element 327, and the second heating element 327 is connected to the second support seat 31. The second heating element 327 is used to output heat to the buttocks of the user leaning against the second main body 12, thereby realizing the heating and massage function of the second main body 12, so that the second heating element 327 can heat and massage the buttocks of the user, thereby facilitating the second main body 12 to integrate the leaning function and the heating and massage function.

[0065] Please refer to the attached Figure 7 The second massage areas 311 include a plurality of second massage areas 311, which are distributed at different positions of the second support seat 31; each second massage area 311 matches a corresponding second massage piece 32, and the massage area of ​​the second massage area 311 relative to the user's buttocks is increased by arranging a plurality of second massage areas 311, thereby facilitating improving the massage effect of the second massage area 311 relative to the user's buttocks. Optionally, the massage effects of the second massage pieces 32 matched with each second massage area 311 are the same, or the massage effects of the second massage pieces 32 matched with each second massage area 311 are different.

[0066] Please refer to the attached Figure 7 A second function integration area 3111 is formed between the multiple second massage areas 311, and the second function integration area 3111 is arranged relative to different positions of the user's buttocks so that the second function integration area 3111 can massage different positions of the user's buttocks.

[0067] In another embodiment, a back cushion includes a back cushion assembly 100. The back cushion assembly 100 is a part of the back cushion. The back cushion is used to adjust the contact point between a human body and a seat to obtain a more comfortable angle to reduce fatigue of the user.

[0068] Compared with the prior art, the present invention has the following beneficial effects:

[0069] The present invention provides a backrest assembly 100 and a backrest cushion. The backrest cushion body 10 includes a first body part 11 and a second body part 12. The second body part 12 is connected to the first body part 11. A leaning space 10a is formed between the second body part 12 and the first body part 11, and the leaning space 10a is used for a user to lean on. A first massage module 20 is located in the leaning space 10a. The first massage module 20 includes a first support seat 21 and a first massage member 22. The first support seat 21 is connected to the first body part 11. The first support seat 21 is provided with a first massage area 211. The first massage member 22 is arranged relative to the first massage area 211, and massages the user in the leaning space 10a, so that the first massage member 22 massages the user, so that the backrest cushion body 10 integrates the leaning function and the massage function through the first massage module 20, realizes the massage effect of the backrest cushion body 10, avoids the backrest cushion body 10 having only the leaning function, and enriches the functionality of the backrest assembly 100.

[0070] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0071] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0072] Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A backrest assembly, characterized in that: Applied to a backrest cushion, the backrest assembly comprises: The backrest cushion body comprises a first main body part and a second main body part, wherein the second main body part is connected to the first main body part, and a leaning space is formed between the second main body part and the first main body part, and the leaning space is used for a user to lean on; The first massage module is located in the leaning space; the first massage module includes a first support seat and a first massage member; the first support seat is connected to the first main body, the first support seat is provided with a first massage area, the first massage member is arranged relative to the first massage area, and massages the user in the leaning space.

2. The backrest assembly according to claim 1, characterized in that: The first main body portion is located above the second main body portion and is used to support the back of the user; the first main body portion extends along an arc direction to support different positions of the back of the user.

3. The backrest assembly according to claim 2, characterized in that: The first massage element is at least one of a red light emitting element, a vibrating massage element, and a heating massage element.

4. The backrest assembly according to claim 3, characterized in that: There are multiple first massage areas, and the multiple first massage areas are distributed at different positions of the first support seat; Each of the first massage areas matches the corresponding first massage element.

5. The backrest assembly according to claim 4, characterized in that: A first function integration area is formed between the plurality of first massage areas, and the first function integration area is arranged at different positions relative to the back of the user.

6. The backrest assembly according to any one of claims 1 to 5, characterized in that: The backrest assembly also includes a second massage module, which is located in the leaning space; the second massage module includes a second support seat and a second massage piece; the second support seat is connected to the second main body, the second support seat is provided with a second massage area, the second massage piece is arranged relative to the second massage area, and massages the user in the leaning space.

7. The backrest assembly according to claim 6, characterized in that: The second main body is located below the first main body, extends along the front-to-back direction, and is used to support the buttocks of the user; the second main body extends along the arc direction to support different positions of the buttocks of the user.

8. The backrest assembly according to claim 6, characterized in that: The second massage element is at least one of a red light emitting element, a vibrating massage element, and a heating massage element.

9. The backrest assembly according to claim 6, characterized in that: There are multiple second massage areas, and the multiple second massage areas are distributed at different positions of the second support seat; Each of the second massage areas matches the corresponding second massage element; A second function integration area is formed between the plurality of the second massage areas, and the second function integration area is arranged at different positions relative to the buttocks of the user.

10. A back cushion, characterized in that: The invention comprises a backrest assembly as claimed in any one of claims 1 to 9.

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