Split type adjustable backrest frame and backrest

Abstract

The utility model relates to a split type adjustable backrest frame and a backrest, and relates to the technical field of furniture, the split type adjustable backrest frame comprises a frame body and a connecting piece, the frame body and the connecting piece are detachably and fixedly connected, and the connecting piece is installed at the top of the frame body; the connecting piece is provided with more than two mounting positions distributed in the height direction of the frame main body relative to the frame main body, and the connecting piece is mounted at the top of the frame main body and can be adjusted in position in the height direction of the frame main body so as to support the backs of users with different body forms, so that the use requirements are met, and the use experience is improved.

Description

Technical Field

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

[0002] With the development of the furniture industry, split furniture is increasingly used. Backrests are important components of sofas, chairs, and beds, and split backrests are also common. The various parts of the backrest are generally produced on an assembly line, and the sizes of the various parts are adapted so that they can be assembled into one or several backrests of specific sizes. The production and installation are convenient and fast.

[0003] With respect to the above-mentioned related technologies, the inventors found that the existing split-type backrests have a small number of sizes and specifications, which are difficult to meet the needs of all users and have a narrow scope of application. When the user is larger in size, the backrest is difficult to support the user's upper back, resulting in a lower user experience. Utility Model Content

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

[0005] The present application provides a split adjustable backrest frame adopts the following technical solution:

[0006] A split adjustable backrest frame comprises a frame body and a connecting piece, wherein the frame body and the connecting piece are detachably fixedly connected and the connecting piece is installed on the top of the frame body, and the connecting piece has more than two installation positions distributed along the height direction of the frame body relative to the frame body.

[0007] By adopting the above technical solution, the connecting part is installed on the top of the frame body and can be changed in position along the height direction of the frame body, thereby expanding the range of back support for the user, so as to provide effective back support for users of different body shapes, meet usage needs, and improve the user experience.

[0008] Optionally, the frame body has a first connecting part, and the connecting member has a second connecting part for connecting the first connecting part, wherein: the number of installation positions is N, N≥2, the number of first connecting parts is n1, the number of second connecting parts is n2, and n1 and / or n2 is not less than N.

[0009] By adopting the above technical solution, the frame body and the connecting member are connected through the first connecting part and the second connecting part, wherein the relationship between the number n1 of the first connecting parts and the number n2 of the second connecting parts and the number N of the installation positions is: at least one of n1 and n2 must be not less than N, so as to ensure that there can be N kinds of connection positions between the first connecting part and the second connecting part to meet the use requirements of the N installation positions.

[0010] Optionally, when n1≥2 and n2≥2, and at least two first connection parts are correspondingly connected to two corresponding second connection parts, n1 and / or n2 is not less than N+1; and when the frame body and the connecting piece are in a connected state, the first connection part and the second connection part are distributed along the height direction of the frame body.

[0011] By adopting the above technical solution, n1 and n2 are both greater than 2, and there are at least two first connecting parts correspondingly connected to the corresponding two second connecting parts, thereby improving the connection strength between the frame body and the connecting piece and the structural reliability of the backrest frame. In addition, at least one of n1 and n2 needs to be no less than N+1. In the connected state, the first connecting part and the second connecting part are distributed along the height direction of the frame, meeting the use requirement of having N installation positions between the connecting piece and the frame body along the height direction of the frame body.

[0012] Optionally, the backrest frame further includes a fastener for connecting the first connecting portion and the second connecting portion.

[0013] By adopting the above technical solution, fasteners are provided to further improve the connection strength between the first connecting part and the second connecting part, thereby ensuring the structural reliability of the backrest frame.

[0014] Optionally, more than two fasteners are connected between the first connecting portion and the second connecting portion.

[0015] By adopting the above technical solution, more than two fasteners are connected between the first connecting part and the second connecting part, which further improves the connection strength between the first connecting part and the second connecting part and ensures the structural reliability of the backrest frame.

[0016] Optionally, the backrest frame further comprises an elastic member, one end of the elastic member is connected to the connecting member, and the other end of the elastic member is connected to the frame body.

[0017] By adopting the above technical solution, an elastic member is arranged on the backrest frame to improve the user's back support experience; one end of the elastic member is connected to the connecting member, and the other end is connected to the frame body. When the connecting member is installed in a different position, since the elastic member has a certain elastic deformation ability, it can still meet the effect of elastically supporting the user's back and has strong applicability.

[0018] Optionally, the maximum elastic deformation of the elastic member along the height direction of the frame body is L, and the distance between any two installation positions is D, wherein: the component of D along the elastic force direction of the elastic member is d, and d<L.

[0019] By adopting the above technical solution, the elastic part generally has a maximum elastic deformation L. When the elastic deformation exceeds L, the elastic part will be damaged or even unable to be elastically reset. Therefore, the component d of the distance D between the two installation positions along the elastic force direction of the elastic part needs to be smaller than L. This not only ensures that the elastic deformation of the elastic part can always be less than L during the installation position adjustment process, but also leaves a margin for the elastic deformation of the elastic part when the user leans on it, thereby improving the structural reliability.

[0020] Optionally, the elastic member is connected to the bottom of the frame body.

[0021] By adopting the above technical solution, one end of the elastic member is connected to the connecting member, and the other end is connected to the bottom of the frame body, and the connecting member is installed on the top of the frame body, so that the elastic member can fully support the user's back along the height direction of the frame, thereby ensuring the user's usage experience.

[0022] Optionally, a back plate is mounted on the frame body.

[0023] By adopting the above technical solution, during the position adjustment process between the connecting piece and the frame body, the provision of the back plate can ensure the structural strength of the frame body and improve the structural reliability of the structural backrest frame.

[0024] The present application also discloses a backrest adopting the following technical solution:

[0025] A backrest comprises the split adjustable backrest frame as described above.

[0026] By adopting the above technical solution, the backrest adopts the above-mentioned split adjustable backrest frame, and the backrest height can be adjusted based on the user's body shape to meet the user's usage needs and improve the user experience.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. In this application, the connector is installed on the top of the frame body and can be adjusted in position along the height direction of the frame body to support the backs of users of different body shapes, meet usage requirements, and improve the user experience;

[0029] 2. In a further configuration of the present application, an elastic member is connected between the frame body and the connecting member, which can not only provide elastic support to the user's back, but also adapt to different installation positions of the connecting member based on its own elastic deformation. In addition, the elastic member is connected to the bottom of the frame body so that the elastic member can fully support the user's back along the height direction of the frame body, thereby improving the user experience;

[0030] 3. In a further configuration of the present application, the frame body and the connecting member are connected via a first connecting portion and a second connecting portion, and the connection strength and structural reliability are improved by adopting a suitable number of first connecting portions and second connecting portions, adding fasteners and increasing the number of fasteners. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional structural diagram of a split adjustable backrest frame, wherein the connecting member is located at one of the installation positions;

[0032] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the middle connecting member in another installation position;

[0033] Figure 3 It is an exploded three-dimensional structural diagram of a split adjustable backrest frame;

[0034] Figure 4 yes Figure 1 A side view schematic diagram of the elastic member, the connecting member and the second crossbeam is shown;

[0035] Figure 5 is a schematic diagram of a side view of an exploded state of a first side plate, a connecting member and a fastener;

[0036] Figure 6 yes Figure 5 A partial enlarged schematic diagram in the figure is used to show the schematic diagram of two installation positions of the connecting member in the first embodiment;

[0037] Figure 7 yes Figure 5 A partial enlarged schematic diagram in the figure is used to show the schematic diagram of two installation positions of the connecting member in the second embodiment;

[0038] Figure 8 yes Figure 5 A partial enlarged schematic diagram in the figure is used to show the schematic diagram of two installation positions of the connecting member in the third embodiment;

[0039] Fig. 9 yes Figure 5 A partial enlarged schematic diagram in the figure is used to show the schematic diagram of two installation positions of the connecting member in the fourth embodiment;

[0040] Fig.10 yes Figure 5 A partial enlarged schematic diagram in the figure is used to show the schematic diagram of two installation positions of the connecting member in the fifth embodiment;

[0041] Fig.11 yes Figure 5 A partial enlarged schematic diagram in the figure is used to show the schematic diagram of two installation positions of the connecting member in the sixth embodiment;

[0042] Fig.12 yes Figure 5 A partial enlarged schematic diagram in the figure is used to show the schematic diagram of two installation positions of the connecting member in the seventh embodiment;

[0043] Fig.13 yes Figure 5 A partial enlarged schematic diagram in the figure is used to show the schematic diagram of two installation positions of the connecting member in the eighth embodiment;

[0044] Fig.14 It is a three-dimensional structural schematic diagram of a backrest.

[0045] Explanation of the accompanying drawings: 1. Frame body; 11. First side panel; 12. Second side panel; 13. First cross beam; 14. Second cross beam; 15. First connecting part; 2. Connecting piece; 21. Second connecting part; 3. Fastener; 4. Elastic piece; 5. Back panel; 6. Face cover; 7. Soft bag. DETAILED DESCRIPTION

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] The following is combined with Figure 1-14 This application is described in further detail.

[0051] The present application embodiment discloses a split type adjustable backrest frame, as shown in the attached Figure 1 To Attachment Figure 5 As shown, it includes a frame body 1, a connecting member 2 and an elastic member 4. The frame body 1 and the connecting member 2 are fixedly connected in a detachable manner and the connecting member 2 is installed on the top of the frame body 1. The connecting member 2 has more than two installation positions distributed along the height direction of the frame body 1 relative to the frame body 1.

[0052] When the backrest frame is in use, the user's back leans against the backrest frame, and the connector 2 is used to support the user's upper back, neck, and even head. However, for users with a long body, the head, neck, and even part of the upper back are higher than the connector 2, so that they cannot be effectively supported, and the user experience is poor. The connector 2 has more than two installation positions relative to the frame body 1, and these installation positions are distributed along the height direction of the frame, that is, the height position of the connector 2 can be adjusted to suit users with a long body.

[0053] It should be noted that the top of the frame body 1 mentioned above refers to the position above the middle part of the frame body 1, or after the frame body 1 is divided into three parts along the height direction, the part of the frame body 1 located above is the top of the frame body 1. Therefore, the top of the frame body 1 is not limited to the highest point on the frame body 1.

[0054] As for the elastic member 4, its function is mainly to improve the user experience. One end of the elastic member 4 is connected to the connecting member 2, and the other end is connected to the frame body 1, which can provide elastic support to the user's back. Specifically, the elastic member 4 is connected to the bottom of the frame body 1, that is, the elastic member 4 is connected between the connecting member 2 and the second crossbeam 14. Since the connecting member 2 and the second crossbeam 14 are respectively located at the top and bottom of the frame body 1, the elastic member 4 can cover along the height direction of the frame body 1, thereby supporting the entire back of the user. In addition, after the connecting member 2 adjusts the installation position, the elastic member 4 will expand and contract, and the elastic member 4 itself has a certain elastic deformation ability, which can ensure that the elastic member 4 can provide effective elastic back support to the user when the connecting member 2 is in each installation position, thereby improving the reliability and application scope of the structure. The elastic member 4 adopts a serpentine spring with high elasticity and good restoring force, and is distributed along the width direction of the frame body 1. A plurality of them are used to apply to backrests of different sizes such as single backrests and multi-person backrests. In this embodiment, five elastic members 4 are provided.

[0055] It should be noted that the elastic deformation of the elastic member 4 is limited, so the maximum elastic deformation of the elastic member 4 and the spacing between the installation positions of the connecting member 2 are limited by a certain quantitative relationship. Specifically, the maximum elastic deformation of the elastic member 4 along the height direction of the frame body 1 is L, and the spacing between any two installation positions of the connecting member 2 is D, where the component of D along the elastic force direction of the elastic member 4 is d, and d<L.

[0056] The maximum elastic deformation refers to the difference between the maximum length that the elastic member 4 can be stretched and the length when the elastic force of the elastic member 4 is zero. When the elastic member 4 is stretched to a length greater than the maximum length, the elastic member 4 will undergo plastic deformation and cannot return to its original state.

[0057] In addition, in actual use, the elastic force direction of the elastic member 4 is not strictly consistent with the height direction of the frame body 1. Therefore, what is limited is the quantitative relationship between the component d of the spacing between the installation positions of the connecting member 2 along the elastic force direction of the elastic member 4 and the maximum elastic deformation L of the elastic member 4. In actual design, it is only necessary to consider the quantitative relationship between the spacing between the two installation positions that are farthest apart and the maximum elastic deformation of the elastic member 4.

[0058] The frame body 1 includes a first side panel 11, a second side panel 12, a first cross beam 13 and a second cross beam 14. The first side panel 11 and the second side panel 12 are distributed on the left and right sides. The first cross beam 13, the second cross beam 14 and the connecting member 2 are all fixedly installed between the two side panels, wherein the installation position between the connecting member 2 and the side panel is adjustable. Therefore, the fixed installation method between the connecting member 2 and the side panel is a detachable fixed connection, and the installation method of the first cross beam 13 and the second cross beam 14 can be detachable or non-detachable.

[0059] To facilitate actual production and installation, the connection member 2, the first cross beam 13, the second cross beam 14 and the two side panels are all fastened and installed using a bolt fastening process.

[0060] In addition, the first cross beam 13 is located in the middle of the first side panel 11 and the second side panel 12, the second cross beam 14 is located at the bottom of the first side panel 11 and the second side panel 12, and the connecting member 2 is installed on the top of the first side panel 11 and the second side panel 12 to ensure the connection strength of the entire frame body 1 along the height direction.

[0061] In a further configuration, a back plate 5 is also installed on the frame body 1. The back plate 5 is installed between the two side plates and is located between the first cross beam 13 and the connecting member 2 in the height direction. When the connecting member 2 is removed from between the two side plates to adjust the installation position, the portion above the first cross beam 13 lacks structural support. The configuration of the back plate 5 can ensure the structural stability of the frame body 1.

[0062] The frame body 1 is provided with a first connecting portion 15, and the number of the first connecting portions 15 is n1. The connecting member 2 is provided with a second connecting portion 21 for connecting the first connecting portion 15, and the number of the second connecting portions 21 is n2. The number of the connecting members 2 relative to the frame body 1 is N, wherein N≥2, and the quantitative relationship among n1, n2 and N is: n1 and / or n2 is not less than N, that is, at least one of n1 and n2 is not less than N.

[0063] It should be noted that: when n1≥2 and n2≥2, and there are at least two first connection parts 15 correspondingly connected to the corresponding two second connection parts 21, the quantitative relationship between n1, n2 and N is: n1 and / or n2 is not less than N+1, and, when the frame body 1 and the connecting member 2 are in a connected state, the first connection part 15 and the second connection part 21 are distributed along the height direction of the frame body 1.

[0064] In a further configuration, a fastener 3 may be provided to connect the first connection portion 15 and the second connection portion 21 to enhance the connection strength. Connecting more than two fasteners 3 between the first connection portion 15 and the second connection portion 21 may further enhance the connection strength and improve the structural reliability.

[0065] Regarding the connection structure between the connecting member 2 and the frame body 1, the present application specifically discloses the following embodiments:

[0066] Embodiment 1

[0067] Combined with Figure 6 , the number of installation positions N=2; the number of first connection parts 15 n1=2; the number of second connection parts 21 n2=1. A mounting hole is provided on each of the first connection part 15 and the second connection part 21 for the fastener 3 to pass through and connect. The fastener 3 is a bolt, so that the connection between the first connection part 15 and the second connection part 21 is simple and convenient.

[0068] In other embodiments, the fastener 3 may be a latch for interference fit connection with the first connection portion 15 and the second connection portion 21 , which can also meet the connection requirements.

[0069] It should be noted that in this embodiment, the first connection portion 15 and the second connection portion 21 refer to the parts on the frame body 1 and the connection member 2. In addition, as the installation position of the connection member 2 changes, the connection position of the bolt fastener 3 used for connection and the frame body 1 also changes.

[0070] Embodiment 2

[0071] Combined with Figure 7, which is different from the first embodiment in that two mounting holes are provided on each of the first connection part 15 and the second connection part 21. That is, the first connection part 15 and the second connection part 21 are connected by two bolt fasteners 3, thereby improving the connection reliability. When a single bolt is connected, if the bolt is loose, there will be a hidden danger of relative rotation between the first connection part 15 and the second connection part 21, which affects the connection stability.

[0072] Embodiment 3

[0073] Combined with Figure 8 , the number of installation positions N=2; the number of first connection parts 15 n1=1; the number of second connection parts 21 n2=2. A mounting hole is provided on each of the first connection part 15 and the second connection part 21 for the fastener 3 to pass through and connect, and the fastener 3 is a bolt.

[0074] The difference from the first embodiment is that the connection body between the bolt fastener 3 and the frame body 1 remains unchanged as the installation position of the connection member 2 changes.

[0075] Embodiment 4

[0076] Combined with Fig. 9 , the number of installation positions N=2; the number of first connection parts 15 n1=2; the number of second connection parts 21 n2=1. A mounting hole is provided on each of the first connection part 15 and the second connection part 21 for the fastener 3 to pass through and connect, and the fastener 3 is a bolt.

[0077] The difference from the first embodiment is that the two first connection parts 15 are adjacent and the mounting holes on the two first connection parts 15 are connected to form a strip groove. When the installation position of the connection member 2 is changed, it is only necessary to loosen the fastener 3 and move the fastener 3 along the strip groove from one of the first connection parts 15 to the other first connection part 15, and then tighten the fastener 3. In this process, as the installation position of the connection member 2 changes, the connection position of the bolt fastener 3 used for connection and the frame body 1 changes.

[0078] Embodiment 5

[0079] Combined with Fig.10 , the number of installation positions N=2; the number of first connection parts 15 n1=1; the number of second connection parts 21 n2=2. A mounting hole is provided on each of the first connection part 15 and the second connection part 21 for the fastener 3 to pass through and connect. The fastener 3 is a bolt. The two second connection parts 21 are adjacent and the mounting holes on the two second connection parts 21 are connected to form a strip groove. The difference from the fourth embodiment is that as the installation position of the connection part 2 changes, the position of the bolt fastener 3 used for connection remains unchanged relative to the frame body 1.

[0080] Embodiment 6

[0081] Combined with Fig.11 , the number of installation positions N=2; the number of first connecting parts 15 n1=3; the number of second connecting parts 21 n2=2. A mounting hole is provided on each of the first connecting part 15 and the second connecting part 21 for the fastener 3 to pass through and connect, and the fastener 3 is a bolt. The difference from the first embodiment is that when the connecting member 2 is in any installation position, the two second connecting parts 21 are connected to the first connecting part 15 by the bolt fastener 3, thereby improving the stability and reliability of the connection. In this embodiment, as the installation position of the connecting member 2 changes, the position of the bolt fastener 3 used for connection relative to the frame body 1 also changes.

[0082] It should be noted that the number of connection modes that can be combined with n1 first connection parts 15 and n2 second connection parts 21 is not less than N, and it is not strictly required that the number of connection modes that can be combined is equal to N. In the actual design process, the number of installation positions N is first determined, and then the number n1 of the first connection parts 15 and the number n2 of the second connection parts 21 are determined. The actual final determination of the number n1 of the first connection parts 15 and the number n2 of the second connection parts 21 can be determined based on the principle of production economy, that is, among all the numbers n1 and n2 that meet the conditions, the sum of n1+n2 is the smallest.

[0083] Embodiment 7

[0084] Combined with Fig.12 , which is different from the sixth embodiment in that two mounting holes are provided on each of the first connecting portion 15 and the second connecting portion 21. That is, the first connecting portion 15 and the second connecting portion 21 are connected by two bolt fasteners 3, which further improves the connection reliability.

[0085] Embodiment 8

[0086] Combined with Fig.13 , the number of installation positions N=2; the number of first connection parts 15 n1=2; the number of second connection parts 21 n2=3. A mounting hole is provided on each of the first connection part 15 and the second connection part 21 for the fastener 3 to pass through and connect, and the fastener 3 is a bolt. The difference from the sixth embodiment is that: as the installation position of the connection part 2 changes, the position of the bolt fastener 3 used for connection remains unchanged relative to the frame body 1.

[0087] Embodiment 9 (not shown)

[0088] The difference from the first embodiment is that the first connection part 15 and the second connection part 21 are directly connected by means of magnetic connection with magnets, mortise and tenon connection, etc., and no other additional fasteners 3 such as bolts are required, thereby reducing the number of parts.

[0089] The present application also discloses a backrest, as shown in the attached Fig.14 As shown, it includes a split adjustable backrest frame (not shown) as described in the above embodiment, a cover 6 is covered on the backrest frame and a soft bag 7 is arranged to improve the comfort of use.

[0090] 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 split adjustable backrest frame, It is characterized in that The invention comprises a frame body (1) and a connecting piece (2), wherein the frame body (1) and the connecting piece (2) are detachably fixedly connected and the connecting piece (2) is installed on the top of the frame body (1), and the connecting piece (2) has more than two installation positions distributed along the height direction of the frame body (1) relative to the frame body (1).

2. The split adjustable backrest frame according to claim 1, It is characterized in that The frame body (1) has a first connection portion (15), and the connection member (2) has a second connection portion (21) for connecting to the first connection portion (15), wherein: the number of the installation positions is N, N≥2, the number of the first connection portions (15) is n1, the number of the second connection portions (21) is n2, and n1 and / or n2 is not less than N.

3. The split adjustable backrest frame according to claim 2, It is characterized in that When n1≥2 and n2≥2, and at least two of the first connection parts (15) are correspondingly connected to two corresponding second connection parts (21), n1 and / or n2 is not less than N+1; and when the frame body (1) and the connection member (2) are in a connected state, the first connection part (15) and the second connection part (21) are both distributed along the height direction of the frame body (1).

4. The split adjustable backrest frame according to claim 2 or 3, It is characterized in that The backrest frame also includes a fastener (3) for connecting the first connecting portion (15) and the second connecting portion (21).

5. The split adjustable backrest frame according to claim 4, It is characterized in that Two or more of the fasteners (3) are connected between the first connection portion (15) and the second connection portion (21).

6. The split adjustable backrest frame according to claim 1, It is characterized in that The backrest frame also includes an elastic member (4), one end of the elastic member (4) being connected to the connecting member (2) and the other end being connected to the frame body (1).

7. The split adjustable backrest frame according to claim 6, It is characterized in that The maximum elastic deformation of the elastic member (4) along the height direction of the frame body (1) is L, and the distance between any two installation positions is D, wherein: the component of D along the elastic force direction of the elastic member (4) is d, and d<L.

8. The split adjustable backrest frame according to claim 6 or 7, It is characterized in that The elastic member (4) is connected to the bottom of the frame body (1).

9. The split adjustable backrest frame according to claim 1, It is characterized in that A back plate (5) is mounted on the frame body (1).

10. A backrest, It is characterized in that It comprises the split adjustable backrest frame as claimed in claim 1.

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