Chair back assembly

Abstract

The utility model provides a chair back assembly which comprises a back support configured as a main body support and a back supporting piece used for supporting the waist and the back of a human body, a connecting piece is arranged on the back supporting piece, a mounting groove is formed in the back support, a locking face is further arranged on the back supporting piece, the locking face faces downwards or faces the middle line of the back support in the left-right direction, and the connecting piece is arranged on the back supporting piece. After the connecting piece is inserted into the mounting groove, a fastener is used for locking the connecting piece and the back bracket on the locking surface; due to the fact that the locking face faces downwards or inwards, the fastening piece can be well hidden, a consumer cannot find the fastening piece easily, and the chair back assembly does not have obvious connection marks on the appearance. According to the chair back assembly, a transition part between the back supporting piece and the back bracket is not exposed, a decorative plate of the fastening piece does not need to be shielded, and the fastening piece is difficult to observe from the appearance, so that a consumer can feel the chair back assembly which is neater, simpler and more textured.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to a chair back assembly. Background Art

[0002] Chairs are one of the most common furniture in our daily life and work. Every household and office of all sizes will purchase one. Some consumers pursue quality, while others focus on functionality and comfort. However, when purchasing, the first impression that a chair gives to consumers is its appearance. High-end office chairs not only require good quality, excellent functionality and comfort, but also a good appearance. The first thing consumers come into contact with is the appearance of the product. A more attractive and textured appearance can be favored and recognized by more consumers, making them more willing to understand and even buy it. Therefore, a better product appearance can give manufacturers more opportunities to reap greater benefits.

[0003] In existing chairs, combined backrest components are often used, that is, the backrest and the bracket are separated, so as to reduce the cost of packaging and transportation; in the finished product, the backrest and the bracket are generally locked by screws after assembly, and the screws used for connection are inevitably exposed, with obvious connection marks. Consumers can also see at a glance that there are many screws exposed on the back of the backrest component. Such a backrest component is not beautiful, affecting the perception, and thus affecting consumers' desire to buy. Therefore, how to connect the backrest and the bracket without obvious connection marks is also an issue that manufacturers need to focus on. Summary of the invention

[0004] In order to solve the above-mentioned technical problems, the utility model provides a chair back assembly, including a back bracket configured as a main body support and a back support member for supporting the waist and back of a human body, the back support member is provided with a connecting member, the back bracket is provided with an installation groove, and the back support member is also provided with a locking surface, the locking surface faces downward or in the left and right directions, the locking surface faces the center line of the back bracket, after the connecting member is inserted into the installation groove, the connecting member and the back bracket are locked on the locking surface with a fastener; because the locking surface faces downward or inward, the fastener can be well concealed, and it is difficult for consumers to find the existence of the fastener, so the chair back assembly has no obvious connection marks in appearance.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A chair back assembly includes a back bracket and a back support member, wherein the back bracket is configured as a main body support and the back support member is configured to support the waist and back of a human body; a connecting member is provided on the back support member, and an installation groove is opened on the back bracket. The connecting member is inserted into the installation groove along the front-to-back direction and makes the back bracket and the back support member fit together; a locking surface is provided on the back bracket, the locking surface faces downward or in the left-right direction, the locking surface faces the center line of the back bracket, and a fastener is provided on the locking surface to lock the back bracket and the connecting member.

[0007] The chair back assembly separates the back bracket and the back support, which reduces the packaging and transportation costs. During assembly, the connecting piece is first locked to the back support, and then the back support is moved so that the connecting piece enters the mounting groove of the back bracket. After the connecting piece is buckled with the back bracket, the locking surface is locked with a fastener. Since the locking surface faces downward or inward, the fastener can be well concealed, and it is difficult for consumers to find the existence of the fastener. Therefore, the chair back assembly has no obvious connection marks in appearance; neither the transition part between the back support and the back bracket is exposed, nor is there a need for a decorative panel to cover the fastener. The fastener is difficult to observe from the appearance, which makes consumers feel that the chair back assembly is more neat, simple and textured.

[0008] Preferably, the back support is provided with two connecting members, which are spaced apart and arranged symmetrically, and are fixedly connected to the back support. The two symmetrical connecting members can make the connection between the back bracket and the back support more stable and firm, thereby ensuring the supporting capacity of the back support.

[0009] Preferably, the back support is a frame structure, and the back support includes an upper crossbar and two left and right vertical bars, and the locking surface is formed on the lower surface of the upper crossbar or the surface of the two vertical bars facing the center line of the back support. When the back support is a frame structure, the mounting groove is generally provided on the upper crossbar or the two vertical bars, so the connector may also be connected to the upper crossbar or the vertical bars. In order to ensure the purpose of concealing the fastener, the locking surface should be formed in a place that is not easily seen directly. The lower surface of the upper crossbar and the surface of the two vertical bars facing the center line of the back support are not easily seen directly. That is to say, when the fastener locks the back support and the connector on the above surface, it can conceal itself well.

[0010] Preferably, the back bracket is a plate, the rear surface of the back bracket is sunken to form a groove, and the locking surface is formed on the upper groove wall or the groove walls on the left and right sides of the groove. When the back bracket is a plate, in order to allow the fastener to be installed on a surface that is not easily found, the rear surface of the back bracket is sunken to form a groove, and the upper groove wall or the groove walls on the left and right sides of the groove are conducive to the formation of the locking surface.

[0011] Preferably, the connecting piece is strip-shaped and vertically arranged on the rear surface of the back support; a hook portion is provided at one end of the connecting piece, and a clamping portion is provided at the other end of the connecting piece; a hook groove is also provided on the installation groove, and the hook portion is inserted into the hook groove; the back support is provided with an elastic buckle at the installation groove, and the clamping portion is clamped with the elastic buckle. The hook portion on the connecting piece corresponds to the hook groove in the installation groove, and the clamping portion on the connecting piece corresponds to the elastic buckle on the back support, so that when the connecting piece is installed on the back support, the connection stability between the connecting piece and the back support is stronger, and the connection between the back support and the back support can be maintained even if the fastener is loose.

[0012] Preferably, the connector is provided with a first arc groove and a first arc protrusion beside the hook portion, and the back support is provided with a second arc protrusion and a second arc groove beside the hook groove. When the connector is installed in the installation groove, the first arc groove engages with the second arc protrusion, and the first arc protrusion engages with the second arc groove. When the back support with the connector installed is installed on the back support, the hook portion is first inserted into the hook groove, and then the clamping portion is clamped with the elastic buckle. During this process, the hook portion needs to rotate. The first arc groove, the first arc protrusion, the second arc groove and the second arc protrusion all have curvature, which is conducive to rotation, and the connector will not get stuck when it is assembled in the installation groove.

[0013] Preferably, the clamping part has a notch formed on one side close to the back support, and a slope formed on the other side of the clamping part. The notch is used to accommodate the elastic buckle, and the slope is conducive to pushing the elastic buckle to deform, thereby making assembly more labor-saving.

[0014] Preferably, a through hole for accommodating the fastener is provided on the locking surface, and the diameter of the through hole is larger than the maximum diameter of the fastener. The fastener is completely sunk into the through hole and will not be exposed from the back bracket, making the fastener more concealed.

[0015] The design starting point, concept and beneficial effects of the utility model using the above technical solution are:

[0016] The chair back assembly separates the back bracket and the back support, which reduces the packaging and transportation costs. During assembly, the connecting piece is first locked to the back support, and then the back support is moved so that the connecting piece enters the mounting groove of the back bracket. After the connecting piece is buckled with the back bracket, the locking surface is locked with a fastener. Since the locking surface faces downward or inward, the fastener can be well concealed, and it is difficult for consumers to find the existence of the fastener. Therefore, the chair back assembly has no obvious connection marks in appearance; neither the transition part between the back support and the back bracket is exposed, nor is there a need for a decorative panel to cover the fastener. The fastener is difficult to observe from the appearance, which makes consumers feel that the chair back assembly is more neat, simple and textured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The three-dimensional structure of the chair back assembly in the first embodiment of the present invention is shown in FIG. Figure 1 ;

[0018] Figure 2 The three-dimensional structure of the chair back assembly in the first embodiment of the present invention is shown in FIG. Figure 2 ;

[0019] Figure 3 It is an exploded view of the chair back assembly in Embodiment 1 of the present invention;

[0020] Figure 4This is a schematic diagram of the three-dimensional structure of the back support in Example 1 of the present utility model;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the connecting member installed on the back support member in Example 1 of the utility model;

[0022] Figure 6 This is a schematic diagram of the three-dimensional structure of the connecting piece in Example 1 of the utility model;

[0023] Figure 7 It is a cross-sectional view of the chair back support in Embodiment 1 of the present invention;

[0024] Figure 8 This is a cross-sectional view of the back support in Example 1 of the present invention.

[0025] The reference numerals of the figures are as follows: back bracket 1; back support member 2; connecting member 3; mounting groove 4; locking surface 5; upper cross bar 6; vertical bar 7; through hole 8; hook portion 9; snap-fit ​​portion 10; hook groove 11; elastic buckle 12; notch 13; inclined surface 14; first arc-shaped groove 15; first arc-shaped protrusion 16; second arc-shaped groove 17; second arc-shaped protrusion 18. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0028] In the description of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0029] The specific implementation of the utility model is as follows: Example

[0030] like Figure 1-3As shown, the utility model provides a chair back assembly, including a back bracket 1 and a back support member 2, the back bracket 1 is configured as a main body support, and the back support member 2 is configured to support the waist and back of a human body; a connecting member 3 is provided on the back support member 2, and a mounting groove 4 is opened on the back bracket 1, the connecting member 3 is inserted into the mounting groove 4 along the front-to-back direction and makes the back bracket 1 fit with the back support member 2; a locking surface 5 is provided on the back bracket 1, the locking surface 5 faces downward or in the left-right direction, the locking surface 5 faces the center line of the back bracket 1, and a fastener for locking the back bracket 1 and the connecting member 3 is provided on the locking surface 5.

[0031] The chair back assembly separates the back bracket 1 and the back support 2, which reduces the packaging and transportation costs. During assembly, the connecting piece 3 is first locked to the back support 2, and then the back support 2 is moved to allow the connecting piece 3 to enter the installation groove 4 of the back bracket 1. After the connecting piece 3 is buckled with the back bracket 1, it is locked with a fastener on the locking surface 5. Since the locking surface 5 faces downward or inward, the fastener can be well hidden, and it is difficult for consumers to find the existence of the fastener. Therefore, the chair back assembly has no obvious connection marks in appearance; neither the transition part between the back support 2 and the back bracket 1 is exposed, nor is there a need for a decorative panel to cover the fastener. The fastener is difficult to observe from the appearance, which makes consumers feel that the chair back assembly is more neat, simple and textured.

[0032] Specifically, if Figure 3-5 As shown, two connecting members 3 are provided on the back support 2, and the two connecting members 3 are spaced apart and symmetrically arranged on the left and right. The two connecting members 3 are fixedly connected to the back support 2, and the connecting members 3 are strip-shaped and vertically arranged on the rear surface of the back support 2; in the present embodiment, the back bracket 1 is a frame structure, and the back bracket 1 includes an upper cross bar 6 and two left and right vertical bars 7, and there are also two mounting grooves 4. In the present embodiment, the two mounting grooves 4 are respectively opened on the two vertical bars 7, so there are also two locking surfaces 5, and the two locking surfaces 5 are respectively formed on the sides of the two vertical bars 7 facing the center line of the back bracket 1, that is, the two locking surfaces 5 face each other and are on the inner side surfaces of the vertical bars 7; the two left-right symmetrical connecting members 3 can make the connection between the back bracket 1 and the back support 2 more stable and firm, thereby ensuring the supporting capacity of the back support 2.

[0033] When the back bracket 1 is a frame structure, the installation groove 4 is generally opened on the upper cross bar 6 or the two vertical bars 7, so the connecting member 3 may also be connected to the upper cross bar 6 or the vertical bar 7. In order to ensure the purpose of concealing the fastener, the locking surface 5 should be formed in a place that is not easily seen directly. The lower surface of the upper cross bar 6 and the surface of the two vertical bars 7 facing the center line of the back bracket 1 are not easily seen directly. That is to say, when the fastener locks the back bracket 1 and the connecting member 3 on the above-mentioned surface, it can conceal itself well. In this embodiment, the fastener is located on the inner side of the vertical bar 7.

[0034] In order to further conceal the fastener, a through hole 8 for accommodating the fastener is opened on the locking surface 5, and the diameter of the through hole 8 is larger than the maximum diameter of the fastener; in this embodiment, the fastener is a screw, and the fastener is completely sunk into the through hole 8 without being exposed from the back bracket 1, making the fastener more concealed.

[0035] Furthermore, if Figure 6-8 As shown, a protruding hook portion 9 is provided at one end of the strip-shaped connecting member 3, and a clamping portion 10 is provided at the other end of the connecting member 3; a hook groove 11 is provided in the mounting groove 4 corresponding to the hook portion 9, and the hook portion 9 can be inserted in the hook groove 11. When the connecting member 3 is installed in the mounting groove 4, the hook groove 11 is used to accommodate the hook portion 9; an elastic buckle 12 is provided at the mounting groove 4 corresponding to the clamping portion 10 of the back bracket 1. When the connecting member 3 is installed in the mounting groove 4, the clamping portion 10 is clamped with the elastic buckle 12; a notch 13 is formed on the side of the clamping portion 10 close to the back support member 2, and a slope 14 is formed on the other side of the clamping portion 10; the notch 13 is used to accommodate the elastic buckle 12, and the slope 14 is conducive to pushing the elastic buckle 12 to deform, thereby making the assembly more economical force; in this embodiment, the connecting member 3 is vertically arranged, the hook portion 9 is located at the upper end of the connecting member 3, and the clamping portion 10 is located at the lower end of the connecting member 3. After the connecting member 3 is installed to the back support member 2, the back support member 2 is moved to first make a part of the upper hook portion 9 enter the hook groove 11, and then the back support member 2 is rotated downward to make the clamping portion 10 located at the lower end engage with the elastic buckle 12; the hook portion 9 on the connecting member 3 corresponds to the hook groove 11 in the installation groove 4, and the clamping portion 10 on the connecting member 3 corresponds to the elastic buckle 12 on the back support 1, so that when the connecting member 3 is installed on the back support 1, the connection stability between the connecting member 3 and the back support 1 is stronger, and the connection between the back support member 2 and the back support 1 can be maintained even if the fastener is loose.

[0036] In order to enable the back support member 2 and the connecting member 3 to rotate smoothly after the hook portion 9 partially enters the hook groove 11, the connecting member 3 is provided with a first arc groove 15 and a first arc protrusion 16 beside the hook portion 9, and correspondingly, the back bracket 1 is provided with a second arc protrusion 18 and a second arc groove 17 beside the hook groove 11. When the connecting member 3 is installed in the mounting groove 4, the first arc groove 15 is engaged with the second arc protrusion 18, and the first arc protrusion 16 is engaged with the second arc groove 17; when the back support member 2 with the connecting member 3 is installed on the back bracket 1, the hook portion 9 is first inserted into the hook groove 11, and then the clamping portion 10 is clamped with the elastic buckle 12. During this process, the hook portion 9 needs to rotate. The first arc groove 15, the first arc protrusion 16, the second arc groove 17 and the second arc protrusion 18 all have curvature, which is conducive to rotation, and the connecting member 3 will not get stuck when it is assembled into the mounting groove 4.

[0037] Embodiment 2: The difference between this embodiment and embodiment 1 is that the connecting member 3 is transversely arranged at the upper end of the back support member 2 and the mounting groove 4 is provided on the upper cross bar 6, and the locking surface 5 is formed on the lower surface of the upper cross bar 6. Specifically:

[0038] The two connecting members 3 are arranged at intervals at the upper end of the back support member 2. The two connecting members 3 are arranged horizontally and the hook portions 9 of the two connecting members 3 are oriented in the same direction, both facing left or right. Correspondingly, the mounting groove 4 is opened on the front surface of the upper cross bar 6; the locking surface 5 is formed on the lower surface of the upper cross bar 6, and the fastener is installed from bottom to top into the through hole 8 of the locking surface 5, and the connecting member 3 is locked with the back bracket 1; after the connecting member 3 is installed on the back support member 2, the back support member 2 is moved so that the hook portion 9 partially enters the hook groove 11, and the back support member 2 is rotated left or right so that the clamping portion 10 is clamped with the elastic buckle 12, and finally the fastener is installed from bottom to top.

[0039] Embodiment 3: The difference between this embodiment and embodiment 1 is that the back support 1 is a plate. Specifically:

[0040] The back bracket 1 is a plate, and the rear surface of the back bracket 1 is sunken to form a groove, and the locking surface 5 is formed on the upper groove wall or the groove walls on the left and right sides of the groove. In this embodiment, the installation grooves 4 are arranged vertically, and two installation grooves 4 are arranged on the back bracket 1 at intervals on the left and right sides, and the locking surfaces 5 are formed on the groove walls on the left and right sides. After the connecting member 3 is installed in the installation groove 4, the fastener locks the connecting member 3 and the back bracket 1 in the left and right direction.

[0041] When the back bracket 1 is a plate, in order to allow the fastener to be installed on a surface that is not easily found, a groove is formed on the rear surface of the back bracket 1. The upper groove wall or the groove walls on the left and right sides of the groove are conducive to the formation of the locking surface 5 and are not easily found.

[0042] Embodiment 4: The difference between this embodiment and embodiment 3 is that the connecting member 3 is transversely arranged at the upper end of the back support member 2 and the mounting groove 4 is provided at the upper end of the front surface of the back support 1, and the locking surface 5 is formed on the upper groove wall of the groove. Specifically:

[0043] The two connecting members 3 are arranged at intervals on the upper end of the back support member 2, and the two connecting members 3 are arranged horizontally and the hooks 9 of the two connecting members 3 are oriented in the same direction, both facing left or right. Correspondingly, the mounting groove 4 is arranged horizontally on the upper end of the front surface of the back bracket 1; the locking member is formed on the upper groove wall of the groove and faces downward, and the fastener locks the back bracket 1 and the connecting member 3 from bottom to top.

Claims

1. A chair back assembly, characterized in that: The back support comprises a back bracket and a back supporting member, wherein the back bracket is configured as a main body support and the back supporting member is configured to support the waist and back of a human body; a connecting member is provided on the back supporting member, and an installation groove is provided on the back bracket, the connecting member is inserted into the installation groove along the front-back direction and makes the back bracket fit with the back supporting member; a locking surface is provided on the back bracket, the locking surface faces downward or in the left-right direction, the locking surface faces toward the center line of the back bracket, and a fastener is provided on the locking surface to lock the back bracket and the connecting member.

2. The seat back assembly according to claim 1, characterized in that: The back support member is provided with two connecting members, which are spaced apart from each other and arranged symmetrically, and are both fixedly connected to the back support member.

3. The seat back assembly according to claim 2, characterized in that: The back support is a frame structure, and the back support includes an upper cross bar and two left and right vertical bars. The locking surface is formed on the lower surface of the upper cross bar or the surface of the two vertical bars facing the center line of the back support.

4. The seat back assembly according to claim 2, characterized in that: The back bracket is a plate, the rear surface of the back bracket is sunken to form a groove, and the locking surface is formed on the upper groove wall or the groove walls on the left and right sides of the groove.

5. The chair back assembly according to claim 1, characterized in that: The connecting piece is strip-shaped and vertically arranged on the rear surface of the back support piece; a hook portion is provided at one end of the connecting piece, and a clamping portion is provided at the other end of the connecting piece; a hook groove is also opened on the installation groove, and the hook portion is inserted into the hook groove; the back bracket is provided with an elastic buckle at the installation groove, and the clamping portion is clamped with the elastic buckle.

6. The chair back assembly according to claim 5, characterized in that: The connecting member is provided with a first arc-shaped groove and a first arc-shaped protrusion beside the hook portion, and the back bracket is provided with a second arc-shaped protrusion and a second arc-shaped groove beside the hook groove. When the connecting member is installed in the installation groove, the first arc-shaped groove is engaged with the second arc-shaped protrusion, and the first arc-shaped protrusion is engaged with the second arc-shaped groove.

7. The chair back assembly according to claim 5, characterized in that: A notch is formed on one side of the clamping portion close to the back support member, and a slope is formed on the other side of the clamping portion.

8. The chair back assembly according to claim 1, characterized in that: A through hole for accommodating a fastener is provided on the locking surface, and a diameter of the through hole is larger than a maximum diameter of the fastener.

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