Chair leg assembly and chair

Abstract

The utility model provides a chair leg assembly which comprises a first chair leg, a second chair leg and a third chair leg which are almost the same in length, and a connecting assembly for connecting and locking the three chair legs, the connecting assembly comprises a connecting rod and a threaded fastener positioned in a mounting groove, and the connecting rod is arranged in a through hole and a connecting hole in a penetrating manner; a second thread structure is arranged at one end of the connecting rod and is matched with the first thread structure; one end of the connecting rod is provided with a threaded fastener, the other end of the connecting rod is provided with a third threaded structure, and the threaded fastener located in the mounting groove is matched with the third threaded structure, so that the first chair leg, the second chair leg and the third chair leg are connected through further dismounting the herringbone chair leg, and the herringbone chair leg is divided into the first chair leg, the second chair leg and the third chair leg; the three chair legs can be disassembled or assembled through the connecting assemblies, the structural strength is guaranteed, meanwhile, the packaging size of the chair legs is further saved, and the transportation cost of the chair is reduced.

Description

Technical Field

[0001] The utility model relates to the field of seats, in particular to a chair leg assembly and a seat. Background Art

[0002] Traditional chairs have four legs supporting the bottom of the seat, but with the development of society, herringbone legs have appeared on the market. Compared with traditional four-legged legs, herringbone legs are simpler and more advanced in appearance, so they are used in most seats.

[0003] For example, in the patent of the bar chair with the announcement number CN205144053U, the iron legs under the iron seat surface use a herringbone structure to provide stable support for the bar chair and make the chair look more advanced in appearance. This herringbone leg is usually formed in one piece or made into a mortise and tenon structure, but such a design makes the legs unable to be disassembled, so that the chair takes up a large space during transportation and maintenance.

[0004] For another example, in the patent for a foldable bench chair with announcement number CN211722466U, a herringbone-shaped chair leg is provided on the side of the bench chair, and the herringbone-shaped chair leg includes a front leg tube and a rear leg tube, and the front leg tube and the rear leg tube are hinged by a connecting piece; the split design of the front leg tube and the rear leg tube allows the front leg tube and the rear leg tube to be disassembled, thereby reducing the packaging volume and transportation cost occupied by the seat; however, the length of the front leg tube is still too long compared to the rear leg tube, and it will still occupy a large volume during transportation and packaging, and the effect of reducing the transportation and packaging cost of the chair legs is not obvious.

[0005] Based on the above problems, it is necessary to design a chair leg assembly that can further split the herringbone chair legs while ensuring the supporting strength of the chair legs, thereby reducing the transportation and packaging costs of the chair. Summary of the invention

[0006] In order to solve the above-mentioned technical problems, the purpose of the utility model is to provide a chair leg assembly, which further disassembles the herringbone chair leg to divide it into a first leg, a second leg, and a third leg. The three legs can be disassembled or assembled through a connecting assembly, while ensuring the structural strength, further saving the volume of the chair leg packaging.

[0007] A seat is further provided, which makes the seat more high-end by symmetrically arranging herringbone-shaped leg assemblies on both sides of a seat back support assembly, while reducing the transport and packaging costs of the seat while reducing the packaging volume of the leg assemblies.

[0008] The technical solution of the utility model is achieved in this way:

[0009] A chair leg assembly, comprising:

[0010] A first chair leg, one end of the first chair leg is configured as a first connecting end, a first connecting member is fixedly connected inside the first connecting end, and the first connecting member has a first thread structure;

[0011] A second chair leg, one end of the second chair leg is configured as a second connecting end, the second connecting end faces the first connecting end, an outer wall of the second chair leg near the second connecting end has a concave mounting groove, the second connecting end has a through hole corresponding to the position of the first threaded structure, and the through hole connects the mounting groove with the second connecting end;

[0012] A third chair leg, one end of the third chair leg is configured as a third connecting end, the third connecting end is between the first connecting end and the second connecting end, the third connecting end has a connecting hole corresponding to the position of the through hole, and the connecting hole passes through the third connecting end;

[0013] The connecting assembly includes a connecting rod and a threaded fastener in an installation groove, wherein the connecting rod is inserted into a through hole and a connecting hole; one end of the connecting rod has a second threaded structure, and the second threaded structure cooperates with the first threaded structure; the other end of the connecting rod has a third threaded structure, and the threaded fastener in the installation groove cooperates with the third threaded structure, thereby connecting the first chair leg, the second chair leg, and the third chair leg.

[0014] Preferably, the outer wall of the first connecting member has an external thread, and the first connecting end is provided with a first screw hole. The first connecting member is fixed inside the first connecting end by matching the external thread of its own outer wall with the first screw hole.

[0015] Preferably, the first threaded structure is an internal threaded hole provided on the first connecting member, and the second threaded structure is an external threaded section at a corresponding end of the connecting rod, and the external threaded section cooperates with the internal threaded hole to connect the first chair leg to the connecting rod.

[0016] Preferably, the third threaded structure is an internal threaded hole provided on the corresponding end of the connecting rod, and the threaded fastener is a locking screw, which cooperates with the internal threaded hole to connect the first chair leg, the second chair leg, and the third chair leg.

[0017] Preferably, the locking screw is a hexagon socket screw; the hexagon socket screw can be matched with a hexagon socket wrench to improve installation efficiency.

[0018] Preferably, the mounting groove includes a mounting wall surface penetrated by a through hole, and a gasket is provided in the mounting groove, the gasket includes a first end face and a second end face opposite to the first end face, the first end face is fitted with the mounting wall surface, and the second end face is a plane; the gasket has an avoidance hole corresponding to the position of the through hole, the corresponding end of the connecting rod with an internal threaded hole is passed through the avoidance hole, the locking screw cooperates with the internal threaded hole of the connecting rod, and the head of the locking screw is fitted with the second end face at the same time; the gasket can be tightly attached to the mounting wall surface and the locking screw at the same time, so that the connection between the locking screw and the internal threaded hole at the end of the connecting rod is more stable.

[0019] Preferably, the cushion block is a molded plastic part; the molded plastic part is convenient for mass production, and the molded cushion block can process the avoidance hole in place in advance, eliminating the step of aligning the cushion block with the through hole during installation.

[0020] Preferably, the first chair leg, the second chair leg and the third chair leg are all made of wood or plastic. The wood or plastic parts have high structural strength and long service life.

[0021] Preferably, the first connecting end has a first slot, the second connecting end has a second slot, and the third connecting end has a plug connector, which cooperates with the first slot and the second slot at the same time, so that the first chair leg, the second chair leg, and the third chair leg form an integrated structure in appearance; while ensuring the connection of the three chair legs, the integrity of the chair leg assembly is improved, so that the appearance of the assembled chair leg assembly is simple and beautiful.

[0022] Preferably, the first slot hollows out the end face of the first connection end and forms a first enclosure shell around the first slot, the second slot hollows out the end face of the second connection end and forms a second enclosure shell around the second slot, the first enclosure shell is provided with a first inclined surface at the opening position of the first slot, and the second enclosure shell is provided with a second inclined surface at the opening position of the second slot, and when the first chair leg, the second chair leg, and the third chair leg are connected, the first inclined surface and the second inclined surface form a V shape; the outer wall of the third connection end shrinks inwardly along the thickness direction to form the plug connector, thereby forming a V-shaped surface at the connection position of the plug connector and the third chair leg;

[0023] When the first chair leg, the second chair leg, and the third chair leg are connected, the plug connector contacts the bottom of the first slot and the bottom of the second slot to form a first support structure, the plug connector contacts the inner wall of the first slot and the inner wall of the second slot to form a second support structure, and the V-shaped surface fits with the first inclined surface and the second inclined surface to form a third support structure; the triple support structure can make the connection between the chair legs more stable.

[0024] Preferably, the third thread structure is an external thread segment provided on the corresponding end of the connecting rod, and the threaded fastener is a nut connected and fitted on the external thread segment.

[0025] Preferably, the first threaded structure is an external threaded column arranged on the end of the first connecting member facing the connecting rod, and the second threaded structure is an internal threaded hole on the corresponding end of the connecting rod; the external threaded column is connected and matched with the internal threaded hole to connect the first chair leg to the connecting rod.

[0026] A chair comprises a seat back support assembly and the chair leg assembly, wherein the chair leg assembly is symmetrically arranged on the left and right sides of the seat back support assembly.

[0027] The beneficial effects of the utility model using the above technical solution are:

[0028] The utility model provides a chair leg assembly and a seat, compared with the prior art:

[0029] 1. Under the premise of ensuring the structural strength of the herringbone chair legs, the two-section herringbone chair legs in the prior art are further split to facilitate disassembly and assembly of the chair legs, thereby reducing the volume occupied by the chair legs during transportation.

[0030] 2. The herringbone chair legs are set on both sides of the seat back support component to make the seat more advanced; at the same time, under the premise of reducing the occupied volume of the chair legs, the seat occupies less space when packed and transported, reducing the transportation cost of the seat.

[0031] 3. When the chair legs are assembled through the connecting components, all the connecting components are inside the chair legs, so that after the chair legs are assembled, there is no trace of screw connection on the exposed surface of the entire herringbone chair leg assembly, thereby making the chair leg assembly more concise and beautiful in appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a structural schematic diagram of a chair leg assembly;

[0033] Figure 2 This is a partial enlarged view of the installation slot;

[0034] Figure 3 This is an exploded and enlarged view of the chair leg assembly;

[0035] Figure 4 is a schematic diagram of the structure of the first chair leg;

[0036] Figure 5 is a schematic diagram of the structure of the second chair leg;

[0037] Figure 6 is a schematic diagram of the structure of the seat;

[0038] Figure 7a An enlarged view of the connecting end of the chair leg when the chair leg is not assembled after the connecting components are hidden;

[0039] Figure 7bAn enlarged view of the connecting end of the chair legs after the chair legs are assembled to hide the connecting components;

[0040] Figure 8 This is a schematic diagram of the structure of the third thread structure and the threaded fastener in Example 2;

[0041] Fig. 9 It is a structural schematic diagram of the first thread structure and the second thread structure in Example 3;

[0042] Fig.10 An exploded view of the chair leg assembly after being connected using a single connecting rod;

[0043] The figures are marked as follows: 1-first chair leg, 2-second chair leg, 3-third chair leg, 4-pad, 5-threaded fastener, 6-connecting rod, 7-seat, 8-back, 9-seat back support assembly, 10-reinforcement rod, 11-first screw hole, 12-first slot, 13-first inclined surface, 13a-first enclosure shell, 21-installation groove, 22-through hole, 23-installation wall, 24-second slot, 25-second inclined surface, 25a-second enclosure shell, 31-connecting hole, 32-plug connector, 33-V-shaped surface, 41-avoidance hole, 42-first end face, 43-second end face, 61-third threaded structure, 62-second threaded structure, 63-first threaded structure, 64-first connecting piece. DETAILED DESCRIPTION

[0044] 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.

[0045] In the description of the present invention, the term "at least one" refers to one or more than one, unless otherwise clearly defined. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0046] 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.

[0047] like Figure 1-10 As shown, the utility model has multiple implementation modes, and the specific implementation modes are as follows:

[0048] Example 1: Figure 1 -7. Fig.10 As shown, the utility model provides a chair leg assembly, comprising:

[0049] A first chair leg 1, one end of the first chair leg 1 is configured as a first connecting end, a first connecting member 64 is fixedly connected inside the first connecting end, and the first connecting member 64 has a first thread structure 63;

[0050] A second chair leg 2, one end of the second chair leg 2 is configured as a second connecting end, the second connecting end faces the first connecting end, an outer wall of the second chair leg 2 is provided with a concave mounting groove 21 near the second connecting end, the second connecting end is provided with a through hole 22 corresponding to the position of the first threaded structure 63, and the through hole 22 connects the mounting groove 21 with the second connecting end;

[0051] A third chair leg 3, one end of the third chair leg 3 is configured as a third connecting end, the third connecting end is between the first connecting end and the second connecting end, the third connecting end has a connecting hole 31 corresponding to the position of the through hole 22, and the connecting hole 31 passes through the third connecting end;

[0052] The connecting assembly includes a connecting rod 6 and a threaded fastener 5 in the mounting groove 21, wherein the connecting rod 6 is inserted into the through hole 22 and the connecting hole 31; one end of the connecting rod 6 has a second threaded structure 62, and the second threaded structure 62 cooperates with the first threaded structure 63; the other end of the connecting rod 6 has a third threaded structure 61, and the threaded fastener 5 in the mounting groove 21 cooperates with the third threaded structure 61, thereby connecting the first chair leg 1, the second chair leg 2, and the third chair leg 3.

[0053] Furthermore, the first connecting member is fixed in the first connecting end as follows: the outer wall of the first connecting member 64 has an external thread, and a first screw hole 11 is provided on the first connecting end. The first connecting member 64 cooperates with the first screw hole 11 through the external thread of its own outer wall, so that the first connecting member 64 is fixed inside the first connecting end.

[0054] Furthermore, the first thread structure 63 is an internal thread hole provided on the first connecting member 64 , and the second thread structure 62 is an external thread segment at the corresponding end of the connecting rod 6 , and the external thread segment cooperates with the internal thread hole to connect the first chair leg 1 to the connecting rod 6 .

[0055] Furthermore, after the first threaded structure 63 is threadedly connected with the second threaded structure 62, it is also necessary to cooperate with the threaded fastener 5 through the third threaded structure 61 to connect the third chair leg 3. The third threaded structure 61 is an internal threaded hole set on the corresponding end of the connecting rod 6, and the threaded fastener 5 is a locking screw. The locking screw cooperates with the internal threaded hole to connect the first chair leg 1, the second chair leg 2, and the third chair leg 3.

[0056] Furthermore, the slot width of the mounting groove 21 cannot be too large to avoid affecting the connection strength of the second chair leg 2. However, when the locking screw is installed into the internal threaded hole at the end of the connecting rod 6 using a wrench, a certain installation space is required. Therefore, the locking screw is a hexagon socket screw; the hexagon socket screw can be matched with the hexagon socket wrench. During installation, the hexagon socket wrench is at the length position of the mounting groove. There is no need to increase the slot width of the mounting groove 22. The installation can be performed by turning the wrench on the head of the locking screw, thereby improving the efficiency of installation.

[0057] Furthermore, the mounting groove 21 includes a mounting wall 23 penetrated by the through hole 22. In order to make the connection between the locking screw and the corresponding internal threaded hole more stable, a pad 4 is provided in the mounting groove 21. The pad 4 includes a first end face 42 and a second end face 43 opposite to the first end face 42. The first end face 42 is in contact with the mounting wall 23, and the second end face 43 is a plane. Usually, the contour of the mounting wall 23 can be a curved surface or a plane, and the contour of the first end face 42 of the pad 4 corresponds to the contour of the mounting wall 23. The pad 4 has an avoidance hole 41 corresponding to the position of the through hole 22, and the corresponding end of the connecting rod 6 with the internal threaded hole is inserted into the avoidance hole 41. The locking screw cooperates with the internal threaded hole of the connecting rod 6, and the head of the locking screw is in contact with the second end face 43 at the same time. The pad 4 can be in contact with the mounting wall 23 and the locking screw at the same time, so that the connection between the locking screw and the internal threaded hole at the end of the connecting rod 6 is more stable.

[0058] Furthermore, the cushion block 4 is a molded plastic part; the molded plastic part is convenient for mass production, and the molded cushion block 4 can process the avoidance hole 41 in place in advance, eliminating the step of aligning the cushion block 4 with the through hole 22 during installation.

[0059] Furthermore, the first chair leg 1, the second chair leg 2, and the third chair leg 3 are all made of wood or plastic. The wood or plastic parts have high structural strength and long service life.

[0060] Furthermore, in order to ensure the integrity of the chair leg assembly after assembly, a first slot 12 is provided on the first connecting end, a second slot 24 is provided on the second connecting end, and a plug connector 32 is provided on the third connecting end. The plug connector 32 cooperates with the first slot 12 and the second slot 24 at the same time, so that the first chair leg 1, the second chair leg 2, and the third chair leg 3 form an integrated structure in appearance; while ensuring the connection of the three chair legs, the integrity of the chair leg assembly is improved, so that the appearance of the assembled chair leg assembly is simple and beautiful.

[0061] Further, if Figure 4-7bAs shown, in order to ensure that the first chair leg 1, the second chair leg 2, and the third chair leg 3 have sufficient supporting strength when connected, multiple supporting structures are provided between the first connecting end, the second connecting end, and the third connecting end, wherein the first slot 12 hollows out the end surface of the first connecting end, and forms a first enclosure shell 13a around the first slot 12, the second slot 24 hollows out the end surface of the second connecting end, and forms a second enclosure shell 25a around the second slot 24, the first enclosure shell 13a is provided with a first inclined surface 13 at the opening position of the first slot 12, and the second enclosure shell 25a is provided with a second inclined surface 25 at the opening position of the second slot 24, when the first chair leg 1, the second chair leg 2, and the third chair leg 3 are connected, the first inclined surface 13 and the second inclined surface 25 form a V shape; the outer wall of the third connecting end shrinks inwardly along the thickness direction to form the plug connector 32, so that the connecting position of the plug connector 32 and the third chair leg 3 forms a V-shaped surface 33;

[0062] When the first chair leg 1, the second chair leg 2, and the third chair leg 3 are connected, the plug connector 32 contacts the bottom of the first slot 12 and the bottom of the second slot 24 to form a first support structure, which is a basic support structure; the plug connector 32 contacts the inner wall of the first slot 12 and the inner wall of the second slot 24 to form a second support structure, which is a transverse support structure, which can prevent the chair legs from being dislocated in the transverse direction; the V-shaped surface 33 is in contact with the first inclined surface 13 and the second inclined surface 25 to form a third support structure; the third support structure can play an auxiliary supporting role for the chair leg assembly; at this point, the triple support structure forms a sufficient support effect at the chair leg connection position, making the connection between the chair legs more stable.

[0063] Furthermore, the V-shaped surface 33 fits with the first inclined surface 13 and the second inclined surface 25 to form a third support structure, and can also make the force on the chair legs more uniform. Since the V-shaped surface 33, the first inclined surface 13, and the second inclined surface 25 are all inclined surfaces, when any one of the first chair leg 1, the second chair leg 2, and the third chair leg 3 is subjected to force, the inclined surfaces that fit together can transfer part of the force to the other two chair legs, thereby sharing the force on the chair legs and avoiding the situation where the force on the chair legs is too concentrated.

[0064] Furthermore, in order to ensure a stable connection between the chair legs, the number of the connecting rod 6, the threaded fastener 5, and the first connecting member 64 is configured to be at least one, and the number of the through hole 22 and the connecting hole 31 is also configured to be at least one. There are two design schemes for the number distribution, one of which is as follows: Figure 1 -7, the number of the connecting rod 6, the threaded fastener 5 in the mounting groove 21, and the first connecting member 63 are usually two or more, and the number of the through hole 22 and the connecting hole 31 are also two or more. This solution has a good connection effect and is suitable for connecting chair legs with larger sizes. Another solution is as follows Fig.10The number of the connecting rod 6, the threaded fastener 5 in the mounting groove 21, and the first connecting member 63 shown in the figure is usually one, the number of the through hole 22 and the connecting hole 31 are also configured as one, and their matching positions are located in the middle of the first connecting end, the second connecting end, and the third connecting end. This connection scheme takes into account that a large number of through holes 22 and connecting holes 31 may affect the structural strength of the chair legs, and is therefore suitable for connecting chair legs with smaller sizes.

[0065] like Figure 6 As shown, a chair is provided, including a seat back support assembly 9 and the chair leg assembly, the seat back support assembly 9 includes a seat 7 and a seat back 8, the chair leg assemblies are symmetrically arranged on the left and right sides of the seat back support assembly 9, the seat back 8 is connected between the first chair legs in the chair leg assemblies on both sides, and the remaining two chair legs are in contact with the ground and are connected to the left and right sides of the seat 7; and in order to make the connection between the chair leg assemblies on both sides stable, a reinforcing rod 10 is connected between the third chair legs 3 on the chair leg assemblies on both sides.

[0066] Example 2: Figure 8 As shown, the difference between this embodiment and the above embodiment is that another thread matching structure is provided in this embodiment, that is, the third thread structure 61 is an external thread segment arranged on the corresponding end of the connecting rod 6, and the threaded fastener 5 is a nut connected and matched on the external thread segment. By tightening the nut on the external thread segment, the same locking connection effect as in the above embodiment can also be achieved.

[0067] Example 3: Fig. 9 As shown, the difference between this embodiment and the above embodiment is that another threaded matching structure is provided in this embodiment, the first threaded structure 63 is an external threaded column arranged on the end of the first connecting member 64 facing the connecting rod 6, and the second threaded structure 62 is an internal threaded hole on the corresponding end of the connecting rod 6; the external threaded column is connected and matched with the internal threaded hole, so that the first chair leg 1 can also be connected to the connecting rod 6.

[0068] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A chair leg assembly, characterized in that it comprises: A first chair leg (1), one end of the first chair leg (1) being configured as a first connecting end, a first connecting member (64) being fixedly connected inside the first connecting end, and the first connecting member (64) having a first threaded structure (63); A second chair leg (2), one end of the second chair leg (2) being configured as a second connecting end, the second connecting end facing the first connecting end, an outer wall of the second chair leg (2) having a concave mounting groove (21) at a position close to the second connecting end, the second connecting end having a through hole (22) corresponding to the position of the first threaded structure (63), the through hole (22) connecting the mounting groove (21) with the second connecting end; A third chair leg (3), one end of the third chair leg (3) being configured as a third connecting end, the third connecting end being located between the first connecting end and the second connecting end, the third connecting end being provided with a connecting hole (31) corresponding to the position of the through hole (22), the connecting hole (31) passing through the third connecting end; A connecting assembly comprises a connecting rod (6) and a threaded fastener (5) in a mounting groove (21), wherein the connecting rod (6) is inserted into a through hole (22) and a connecting hole (31); one end of the connecting rod (6) has a second threaded structure (62), and the second threaded structure (62) cooperates with a first threaded structure (63); the other end of the connecting rod (6) has a third threaded structure (61), and the threaded fastener (5) in the mounting groove (21) cooperates with the third threaded structure (61), thereby connecting a first chair leg (1), a second chair leg (2), and a third chair leg (3).

2. A chair leg assembly according to claim 1, characterized in that: The outer wall of the first connecting member (64) has an external thread, and a first screw hole (11) is provided on the first connecting end. The first connecting member (64) cooperates with the first screw hole (11) through the external thread on its own outer wall, so that the first connecting member (64) is fixed inside the first connecting end.

3. A chair leg assembly according to claim 1, characterized in that: The first threaded structure (63) is an internal threaded hole provided on the first connecting member (64), and the second threaded structure (62) is an external threaded section at a corresponding end portion of the connecting rod (6), wherein the external threaded section cooperates with the internal threaded hole to connect the first chair leg (1) to the connecting rod (6).

4. A chair leg assembly according to claim 1, characterized in that: The third threaded structure (61) is an internal threaded hole provided on the corresponding end of the connecting rod (6), and the threaded fastener (5) is a locking screw, which cooperates with the internal threaded hole to connect the first chair leg (1), the second chair leg (2), and the third chair leg (3).

5. A chair leg assembly according to claim 4, characterized in that: The locking screw is a hexagon socket screw.

6. A chair leg assembly according to claim 4, characterized in that: The mounting groove (21) comprises a mounting wall surface (23) penetrated by a through hole (22); a cushion block (4) is arranged in the mounting groove (21); the cushion block (4) comprises a first end surface (42) and a second end surface (43) opposite to the first end surface (42); the first end surface (42) is in contact with the mounting wall surface (23); and the second end surface (43) is a plane; the cushion block (4) has an avoidance hole (41) corresponding to the position of the through hole (22); the corresponding end of the connecting rod (6) having an internal threaded hole is penetrated in the avoidance hole (41); a locking screw cooperates with the internal threaded hole of the connecting rod (6), and the head of the locking screw is in contact with the second end surface (43) at the same time.

7. A chair leg assembly according to claim 6, characterized in that: The spacer (4) is a molded plastic part.

8. The chair leg assembly according to claim 1, characterized in that: The first chair leg (1), the second chair leg (2) and the third chair leg (3) are all wooden parts or plastic parts.

9. The chair leg assembly according to claim 1, characterized in that: The first connecting end has a first slot (12), the second connecting end has a second slot (24), and the third connecting end has a plug connector (32). The plug connector (32) cooperates with the first slot (12) and the second slot (24) at the same time, so that the first chair leg (1), the second chair leg (2), and the third chair leg (3) form an integrated structure in appearance.

10. A chair leg assembly according to claim 9, characterized in that: The first slot (12) hollows out the end surface of the first connection end and forms a first enclosure shell (13a) around the first slot (12); the second slot (24) hollows out the end surface of the second connection end and forms a second enclosure shell (25a) around the second slot (24); the first enclosure shell (13a) is provided with a first inclined surface (13) at the opening position of the first slot (12); the second enclosure shell (25a) is provided with a second inclined surface (25) at the opening position of the second slot (24); when the first chair leg (1), the second chair leg (2) and the third chair leg (3) are connected, the first inclined surface (13) and the second inclined surface (25) form a V shape; the outer wall of the third connection end shrinks inwardly along the thickness direction to form the plug connector (32), so that a V-shaped surface (33) is formed at the connection position of the plug connector (32) and the third chair leg (3); When the first chair leg (1), the second chair leg (2), and the third chair leg (3) are connected, the plug connector (32) contacts the bottom of the first slot (12) and the bottom of the second slot (24) to form a first heavy support structure, the plug connector (32) contacts the inner wall of the first slot (12) and the inner wall of the second slot (24) to form a second heavy support structure, and the V-shaped surface (33) abuts against the first inclined surface (13) and the second inclined surface (25) to form a third heavy support structure.

11. The chair leg assembly according to claim 1, characterized in that: The third thread structure (61) is an external thread segment provided on the corresponding end of the connecting rod (6), and the threaded fastener (5) is a nut connected and fitted on the external thread segment.

12. The chair leg assembly according to claim 1, characterized in that: The first threaded structure (63) is an external threaded column arranged on the end of the first connecting member (64) facing the connecting rod (6), and the second threaded structure (62) is an internal threaded hole on the corresponding end of the connecting rod (6). The external threaded column is connected and matched with the internal threaded hole to connect the first chair leg (1) and the third chair leg (3).

13. The chair leg assembly according to claim 1, characterized in that: The number of the connecting rod (6), the threaded fastener (5), and the first connecting member (64) is configured to be at least one, and the number of the through holes (22) and the connecting holes (31) corresponds to the number of the connecting rod (6), the threaded fastener (5), and the first connecting member (64).

14. A seat, characterized in that: It comprises a seat back support assembly (9) and the chair leg assembly according to claim 1, wherein the chair leg assembly is symmetrically arranged on the left and right sides of the seat back support assembly (9).

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