Backrest frame assembly and backrest

Abstract

The utility model relates to a backrest frame assembly and a backrest, and relates to the technical field of furniture, the backrest frame assembly comprises two mounting pieces and a connecting piece, the connecting piece is mounted between the two mounting pieces, the mounting pieces are provided with positioning structures to limit six degrees of freedom of the connecting piece, and the connecting piece is provided with a plurality of positioning structures; and the positioning structures are arranged on the mounting pieces to limit the connecting pieces in six degrees of freedom, so that the connecting stability between the connecting pieces and the mounting pieces is improved, and the structural stability of the whole backrest frame assembly is improved.

Description

Technical Field

[0001] The present application relates to the field of furniture, and in particular to a backrest frame assembly and a backrest. Background Art

[0002] With the development of the furniture industry, split furniture is becoming more and more popular among users. Backrests are common furniture components and are widely used in sofas, chairs, beds, etc. They can support the back of users when they are sitting, giving users a better user experience. Existing backrests are often assembled with split frames, which are convenient for disassembly, assembly, packaging and transportation.

[0003] With respect to the above-mentioned related technologies, the inventors found that the existing backrest frame is easy to loosen after installation and has poor structural stability, which causes a poor experience for the user when the user leans on it. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a backrest frame assembly and a backrest.

[0005] The backrest frame assembly provided in this application adopts the following technical solution:

[0006] A backrest frame assembly comprises a mounting member and a connecting member, wherein two mounting members are provided and the connecting member is installed between the two mounting members, wherein: the mounting member is provided with a positioning structure to limit the six degrees of freedom of the connecting member.

[0007] By adopting the above technical solution, the positioning structure on the mounting part limits the six degrees of freedom of the connecting part, thereby improving the strength and connection stability between the mounting part and the connecting part, and also improving the structural strength and structural stability of the entire backrest frame, giving the user a better experience.

[0008] Optionally, the positioning structure includes an abutment surface located on the mounting member and a first plug-in portion arranged on the mounting member, one end of the connecting member abuts against the abutment surface on one of the mounting members along the first direction, and the other end of the connecting member abuts against the abutment surface on the other mounting member; the connecting member has a second plug-in portion, the first plug-in portion and the second plug-in portion are plug-fitted along the first direction, and the first plug-in portion and the second plug-in portion abut against each other along the second direction and the third direction; wherein: the first direction, the second direction and the third direction constitute a three-dimensional coordinate system.

[0009] By adopting the above technical solution, the mounting member and the connecting member abut against each other along the first direction, which can limit the freedom of movement in the first direction and the freedom of rotation perpendicular to the first direction; in addition, after the first plug-in portion and the second plug-in portion are plugged and connected, they also abut against each other along the second direction and the third direction, so as to limit the freedom of movement of the connecting member in the second direction and the third direction, the freedom of rotation perpendicular to the second direction, and the freedom of rotation perpendicular to the third direction;

[0010] The first direction, the second direction and the third direction constitute a three-dimensional coordinate system, that is, the six degrees of freedom of the connecting member can be restricted, thereby improving the connection stability.

[0011] Optionally, the cross-sections of the first plug-in portion and the second plug-in portion along the first direction perpendicular to the first direction are both non-circular.

[0012] By adopting the above technical solution, the cross-sections of the first plug-in portion and the second plug-in portion along the vertical first direction are both non-circular, so as to eliminate the structural stability risk of relative rotation of the first plug-in portion and the second plug-in portion after being plugged in.

[0013] Optionally, the mounting member and the connecting member are fixedly connected by fasteners.

[0014] By adopting the above technical solution, the mounting member and the connecting member are fixedly connected by fasteners, which further limits the degree of freedom of the connecting member and improves the connection stability.

[0015] Optionally, the fastener connects the mounting member and the connecting member along the first direction, wherein: the mounting position of the fastener is offset from the plug-in center position of the first plug-in portion and the second plug-in portion.

[0016] By adopting the above technical solution, when the fastener fixes the connection between the mounting member and the connecting member along the first direction, the installation position of the fastener needs to be offset from the plug-in center position of the first plug-in part and the second plug-in part. Even if the cross-section of the first plug-in part and the second plug-in part along the perpendicular first direction is circular, under the restriction of the fastener, relative rotation between the first plug-in part and the second plug-in part after plug-in can be avoided, thereby improving the connection stability.

[0017] Optionally, the positioning structure further includes an abutting portion located on the mounting member, the abutting portion abuts against the connecting member along a fourth direction and a fifth direction, wherein the first direction, the fourth direction and the fifth direction constitute a three-dimensional coordinate system.

[0018] By adopting the above technical solution, the abutment portion abuts against the connecting member from the fourth direction and the fifth direction to limit the connecting member's freedom of movement in the fourth direction and the fifth direction, the freedom of rotation perpendicular to the fourth direction, and the freedom of rotation perpendicular to the fifth direction. The first direction, the fourth direction, and the fifth direction can also constitute a three-dimensional coordinate system, that is, the six degrees of freedom of the connecting member are restricted, and the plug-in action of the plug-in portion further improves the connection stability.

[0019] Optionally, at least two connecting members are provided and are distributed along the height direction of the mounting member.

[0020] By adopting the above technical solution, a plurality of connecting pieces are provided to improve the structural strength of the entire backrest frame and can provide sufficient support for the user's back.

[0021] Optionally, the backrest frame assembly further includes an elastic member, which is connected between any two connecting members.

[0022] By adopting the above technical solution, an elastic member is provided to elastically support the back of the user, so as to improve the user experience.

[0023] Optionally, the backrest frame assembly also includes a back plate, which is plug-connected to the mounting member and / or the connecting member.

[0024] By adopting the above technical solution, a back plate is provided to improve the structural stability of the backrest frame.

[0025] The present application also provides a backrest adopting the following technical solution:

[0026] A backrest comprises the backrest frame assembly as described above.

[0027] By adopting the above technical solution, the whole backrest is installed by using the above backrest frame assembly, which is simple, convenient and fast to install, has a stable structure, and provides users with a better use experience.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. In the present application, a positioning structure is provided on the mounting member to restrict the six degrees of freedom of the connecting member, thereby improving the connection stability between the connecting member and the mounting member, thereby improving the structural stability of the entire backrest frame assembly;

[0030] 2. In the further configuration of the present application, the degree of freedom of the connector is restricted by a method in which the mounting member abuts against the connector and cooperates with the plug-in connection, the fastener connector and the abutment part abut against each other, thereby improving the connection stability and reliability;

[0031] 3. In a further configuration of the present application, multiple connectors are provided to improve the structural strength, and elastic members are connected between the connectors to enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a three-dimensional structural schematic diagram of a backrest frame assembly;

[0033] Figure 2 yes Figure 1 Explosion diagram of

[0034] Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure after the elastic member and the back plate are installed on the middle backrest frame assembly;

[0035] Figure 4 is a side view schematic diagram after the connecting member is installed on the mounting member;

[0036] Figure 5 yes Figure 4 Enlarged schematic diagram of O in the middle;

[0037] Figure 6 yes Figure 4 A magnified schematic diagram of P in the middle;

[0038] Figure 7 yes Figure 4 A magnified schematic diagram of the middle Q;

[0039] Figure 8 is a schematic side view of the mounting member;

[0040] Fig. 9 yes Figure 8 A magnified schematic diagram of R in the middle;

[0041] Fig.10 yes Figure 8 A magnified schematic diagram of S in the middle;

[0042] Fig.11 yes Figure 8 A magnified schematic diagram of T in the middle;

[0043] Fig.12 It is a three-dimensional structural diagram of a backrest.

[0044] Explanation of the accompanying drawings: 1. Backrest frame assembly; 11. Mounting member; 111. First mounting member; 112. Second mounting member; 113. Positioning structure; 1131. First plug-in portion; 114. Abutment portion; 115. Second slot; 116. Abutment surface; 12. Connecting member; 121. Second plug-in portion; 122. First connecting member; 123. Second connecting member; 124. Third connecting member; 125. First slot; 13. Fastener; 14. Elastic member; 15. Back panel; 2. Face cover; 3. Soft bag; a. First direction; b. Second direction; c. Third direction; d. Fourth direction; e. Fifth direction. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various configurations. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0047] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] In the description of the present application, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0049] The following is combined with Figure 1-12 This application is described in further detail.

[0050] The present application embodiment discloses a backrest frame assembly 1, as shown in the attached Figure 1 , Attachment Figure 2 As shown, it includes a mounting member 11 and a connecting member 12. Specifically, two mounting members 11 are provided and have a positioning structure 113. The connecting member 12 is installed between the two mounting members 11, and the six degrees of freedom of the connecting member 12 are restricted by the positioning structure 113, so as to achieve the effect of completely determining the position of the connecting member 12, improve the connection stability between the mounting member 11 and the connecting member 12 and the structural stability of the entire backrest frame assembly 1. The six degrees of freedom of the connecting member 12 refer to: in three-dimensional space, the degrees of freedom of movement of the connecting member 12 along the three spatial rectangular coordinate axes of X, Y, and Z and the degrees of freedom of rotation around these three coordinate axes.

[0051] Among them, at least two connecting members 12 are arranged and distributed along the height direction of the mounting member 11, which improves the structural strength of the entire backrest frame assembly 1 and also facilitates the installation of the elastic member 14 and the back plate 15. The elastic member 14 is connected between any two connecting members 12, and the back plate 15 can be inserted between the two connecting members 12.

[0052] In this embodiment, combined with the attached Figure 3There are three connecting members 12 arranged along the height direction of the mounting member 11. For the convenience of explanation, the three connecting members 12 are the first connecting member 122, the second connecting member 123 and the third connecting member 124 from top to bottom. The first connecting member 122 can support the upper back, neck and head of the user, the second connecting member 123 can support the middle part of the back of the user, and the third connecting member 124 can support the lower back, waist and buttocks of the user.

[0053] In this embodiment, the elastic member 14 is a serpentine spring and is connected between the first connecting member 122 and the third connecting member 124. Five elastic members 14 are distributed along the length direction of the connecting member 12 to provide elastic support for the entire back of the user. It can be suitable for people of different body shapes and give users a better experience.

[0054] Combined with Figure 4 To Attachment Figure 6 The first connector 122 and the second connector 123 are provided with first slots 125 for plugging the backplane 15, so that the backplane 15 is installed between the first connector 122 and the second connector 123. The mounting members 11 on both sides are provided with second slots 115 for plugging the backplane 15. The backplane 15 can be plugged only with the connector 12 or only with the mounting member 11. In this embodiment, the backplane 15 is plugged and connected with the connector 12 and the mounting member 11, so that the four sides of the backplane 15 are plugged and connected, thereby improving the installation stability of the backplane 15.

[0055] For the positioning structure 113, in combination with the attached Figure 7 To Attachment Fig.11 The mounting member 11 includes an abutting surface 116, a first plug-in portion 1131 and an abutting portion 114. One end of the connecting member 12 abuts against the abutting surface 116 on one of the mounting members 11, and the other end of the connecting member 12 abuts against the abutting surface 116 on the other mounting member 11. For ease of explanation, the mounting member 11 is divided into a first mounting member 111 located on the left and a second mounting member 112 located on the right. The connecting member 12 is installed between the first mounting member 111 and the second mounting member 112 to form the backrest frame assembly 1, wherein the right side surface of the first mounting member 111 and the left side surface of the second mounting member 112 are the abutting surface 116, the left end of the connecting member 12 abuts against the abutting surface 116 of the first mounting member 111, and the right end of the connecting member 12 abuts against the abutting surface 116 of the second mounting member 112. The freedom of movement of the connecting member 12 in the left and right directions is limited by the two mounting members 11.

[0056] The connector 12 has a second plug-in portion 121 , the first plug-in portion 1131 is plugged with the second plug-in portion 121 along a first direction, and the first plug-in portion 1131 abuts against the second plug-in portion 121 along the first direction and the second direction, and the first direction, the second direction and the third direction constitute a three-dimensional coordinate system.

[0057] Further explanation: the left-right direction is the X direction, the up-down direction is the Z direction, the front-back direction is the Y direction, and X, Y, and Z form a standard spatial rectangular coordinate system, wherein the X direction is consistent with the first direction. The abutment between the connecting member 12 and the mounting member 11 along the first direction achieves the effect of limiting the freedom of movement of the connecting member 12 along the X direction, the freedom of rotation around the Y direction and around the Z axis, and limits three of the six degrees of freedom of the connecting member 12 to ensure the stability and reliability of the connection between the connecting member 12 and the mounting member 11.

[0058] In addition, after the first plug-in portion 1131 and the second plug-in portion 121 are plugged into each other, the first plug-in portion 1131 and the second plug-in portion 121 are abutted along the first direction and the second direction, wherein the first direction, the second direction and the third direction constitute a three-dimensional coordinate system, and the second direction and the third direction do not need to correspond to the Y-axis and Z-axis directions, but the second direction and the third direction can be decomposed into the Y-axis and Z-axis directions. In this embodiment, the second direction is consistent with the Y-axis direction, and the third direction is consistent with the Z-axis direction. The first plug-in portion 1131 and the second plug-in portion 121 are abutted along the first direction and the second direction, so as to limit the freedom of movement of the connecting member 12 in the Y direction, the freedom of movement in the Z direction, and the freedom of rotation around the X-axis direction, and cooperate with the abutment between the connecting member 12 and the mounting member 11 to achieve the effect of limiting the six degrees of freedom of the connecting member 12.

[0059] It should be noted that the X, Y, and Z spatial rectangular coordinate systems are defined for ease of explanation and are not limitations on the first, second, and third directions. They are mainly used to indicate that the three-dimensional coordinate system formed by the first, second, and third directions can be decomposed into a standard spatial rectangular coordinate system.

[0060] For the first plug-in portion 1131 and the second plug-in portion 121, one is a plug-in component and the other is a socket. In this embodiment, the first plug-in portion 1131 is a plug-in component and the second plug-in portion 121 is a socket. The first plug-in portion 1131 can be integrally formed with the mounting member 11, or can be processed by subsequent welding, punching, etc.; the socket is integrally formed with the connector 12, or can be processed by drilling, punching, etc. In other embodiments, the first plug-in portion 1131 can be a socket and the second plug-in portion 121 can be a plug-in component.

[0061] It should be noted that: the circular cross-section socket and the cylindrical plug-in component (such as a cylindrical plug pin) are common plug-in structures, which are simple to process and convenient to manufacture. Even if the plug-in component abuts against the inner wall of the socket after plugging, there is still a stability risk of the plug-in component rotating in the socket, that is, the rotational freedom of the connector 12 around the X-axis direction is not completely limited. In this embodiment, the cross-sections of the first plug-in portion 1131 and the second plug-in portion 121 along the perpendicular first direction are non-circular, so that the first plug-in portion 1131 and the second plug-in portion 121 are prevented from rotating when plugged in, eliminating the stability risk.

[0062] In addition, the difficulty of self-rotation may be increased by increasing the contact friction between the first plug-in portion 1131 and the second plug-in portion 121 , thereby reducing the potential stability risk.

[0063] In a further configuration, the mounting member 11 and the connecting member 12 can be further fixedly connected by a fastener 13 to improve the connection strength and connection stability between the connecting member 12 and the mounting member 11. If the fastener 13 fixes the mounting member 11 and the connecting member 12 in any direction other than the first direction, the abutment fit and the plug-in fit between the mounting member 11 and the connecting member 12 (even if the first plug-in portion 1131 and the second plug-in portion 121 adopt a plug-in fit with a circular cross section) can also achieve the limitation of the six degrees of freedom of the connecting member 12. The fastener 13 is usually a bolt, a latch, etc.

[0064] When the fastener 13 connects the mounting member 11 and the connecting member 12 along the first direction, the mounting position of the fastener 13 is offset from the plug-in center position of the first plug-in portion 1131 and the second plug-in portion 121. Even if the first plug-in portion 1131 and the second plug-in portion 121 adopt a plug-in matching method with a circular cross-section, the connecting member 12 will not rotate around the X-axis relative to the mounting member 11 under the action of the fastener 13, which can also eliminate the above-mentioned stability risks.

[0065] The abutting portion 114 abuts the connecting member 12 along the fourth direction and the fifth direction, wherein the first direction, the fourth direction and the fifth direction also constitute a three-dimensional coordinate system. The abutting portion 114 and the mounting member 11 can also be made by integral molding, welding, punching, etc., and the fourth direction and the fifth direction can also be decomposed into the Y-axis direction and the Z-axis direction, further restricting the six degrees of freedom of the connecting member 12. In this embodiment, the fourth direction is consistent with the Y-axis direction, and the fifth direction is consistent with the Z-axis direction.

[0066] It should be noted that: in this embodiment, the three connecting members 12 can be connected to the mounting member 11 in different ways. Specifically, the first connecting member 122, the third connecting member 124 and the mounting member 11 are connected in a way that the connecting member 12 abuts against the abutting surface 116, the plug-in portion is plugged, and the abutting portion 114 abuts against the mounting member 11; while the second connecting member 123 and the mounting member 11 are connected in a way that the connecting member 12 abuts against the abutting surface 116, and the abutting portion 114 abuts against the mounting member 111.

[0067] The present application also discloses a backrest, combined with an attached Fig.12 The above-mentioned backrest frame assembly 1 is adopted, a surface cover 2 is sewn on the backrest frame assembly 1 and a soft bag 3 is installed, so as to improve the aesthetics of the entire backrest and the user experience.

[0068] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A backrest frame assembly, characterized in that: It comprises a mounting member (11) and a connecting member (12), wherein two mounting members (11) are provided, and the connecting member (12) is installed between the two mounting members (11), wherein: the mounting member (11) has a positioning structure (113) to limit the six degrees of freedom of the connecting member (12).

2. The backrest frame assembly according to claim 1, characterized in that: The positioning structure (113) comprises an abutment surface (116) located on the mounting member (11) and a first plug-in portion (1131) provided on the mounting member (11); one end of the connecting member (12) abuts against the abutment surface (116) on one of the mounting members (11) along a first direction, and the other end of the connecting member (12) abuts against the abutment surface (116) on another of the mounting members (11); a second plug-in portion (121) is provided on the connecting member (12); the first plug-in portion (1131) and the second plug-in portion (121) are plug-fitted together along the first direction, and the first plug-in portion (1131) and the second plug-in portion (121) abut against each other along a second direction and a third direction; wherein the first direction, the second direction and the third direction constitute a three-dimensional coordinate system.

3. The backrest frame assembly according to claim 2, characterized in that: The cross-sections of the first plug-in portion (1131) and the second plug-in portion (121) along a direction perpendicular to the first direction are both non-circular.

4. The backrest frame assembly according to claim 2 or 3, characterized in that: The mounting member (11) and the connecting member (12) are fixedly connected via a fastener (13).

5. The backrest frame assembly according to claim 4, characterized in that: The fastener (13) connects the mounting member (11) and the connecting member (12) along a first direction, wherein the mounting position of the fastener (13) is offset from the plugging center position of the first plugging portion (1131) and the second plugging portion (121).

6. The backrest frame assembly according to claim 2 or 3, characterized in that: The positioning structure (113) further comprises an abutment portion (114) located on the mounting member (11), the abutment portion (114) abutting against the connecting member (12) along a fourth direction and a fifth direction, wherein the first direction, the fourth direction and the fifth direction constitute a three-dimensional coordinate system.

7. The backrest frame assembly according to claim 1, characterized in that: At least two connecting members (12) are provided and are distributed along the height direction of the mounting member (11).

8. The backrest frame assembly according to claim 7, characterized in that: The backrest frame assembly also includes an elastic member (14), wherein the elastic member (14) is connected between any two of the connecting members (12).

9. The backrest frame assembly according to claim 1, characterized in that: The backrest frame assembly also includes a back plate (15), wherein the back plate (15) is plug-connected to the mounting member (11) and / or the connecting member (12).

10. A backrest, characterized in that: It comprises the backrest frame assembly as claimed in claim 1.

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