Foot tube support seat and chair foot

Abstract

The application discloses a foot pipe support seat and a chair foot, which comprises a plurality of support pipes arranged in a circumferential array, the support pipe is a tubular structure formed by bending and closing at least one plate, the support pipe comprises two mutually inclined first closing parts and second closing parts, the first closing part and the second closing part are closed together through a mortise and tenon structure, the mortise and tenon structure comprises a plurality of tenon heads arranged on the edge of the first closing part and a plurality of mortise grooves opened on the edge of the second closing part; when the bent plate body is closed so that the first closing part faces the second closing part, the tenon head is clamped into the corresponding mortise groove, the first closing part and the second closing part are connected as a whole and are relatively fixed in the horizontal direction and the vertical direction. The foot pipe support seat and the chair foot provided by the application have the advantages that the mortise and tenon structure is arranged between the mutually inclined first closing part and the second closing part of the support pipe, the positioning is accurate, the support pipe has high structural strength, and the stability is better.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to a leg support seat and chair legs. Background Technology

[0002] The five-star base is a standardized base on modern office chairs. It is connected to the gas spring on the office chair through a central support seat. The five legs arranged in a circular array on the central support seat not only provide a large support surface, giving the office chair high stability, but also have casters connected to each leg, allowing the five-star base to support the office chair to move in any direction, providing high flexibility.

[0003] To facilitate manufacturing, some five-star bases on the market have a detachable structure, such as those with... Figure 10 As shown, the central support includes a tapered tube 4, with five branch tubes 5 arranged in a circular array around the periphery of the tapered tube 4. The branch tubes 5 are square tubular structures. After tubular support legs are fitted onto the branch tubes 5, the two are connected and fixed by screws to form a complete chair leg. Furthermore, the branch tube 5 is made by bending a single plate. Both ends of the plate are provided with several limiting protrusions 510 and limiting grooves 520. After the plate is bent, the limiting protrusions 510 on the corresponding side are inserted laterally into the limiting grooves 520 and fixed relative to each other in the left-right direction to form a complete branch tube 5.

[0004] However, the above solution has the following problems: the limiting protrusion 510 and the limiting groove 520 overlap laterally, but during the use of the chair leg, the branch pipe 5 will be subjected to greater pressure in the vertical direction. However, the limiting protrusion 510 and the limiting groove 520 are not constrained in the vertical direction. Under the action of pressure, the limiting protrusion 510 is at risk of detaching from the limiting groove 520, resulting in low structural strength of the branch pipe 5. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a leg support base and chair leg, which sets a mortise and tenon structure between the first and second closed parts of the support tube that are inclined to each other. With the help of the mortise and tenon joint of the tenon and the mortise and tenon, the first closed part closes towards the second closed part and is connected as a whole. This not only provides accurate positioning, but also ensures that when the support tube is subjected to force in the horizontal or vertical direction, the tenon remains against the groove wall of the mortise and tenon, so that the support tube has high structural strength and better stability.

[0006] The effect of this utility model is achieved as follows: In a first aspect, a leg support base includes a plurality of support tubes arranged in a circumferential array. Each support tube is a tubular structure formed by bending and closing at least one plate. Each support tube includes two mutually inclined first and second closed portions. The first and second closed portions are closed together by a mortise and tenon structure. The mortise and tenon structure includes several tenons disposed on the edge of the first closed portion and several mortises opened on the edge of the second closed portion. When the plate is bent so that the first closed portion closes toward the second closed portion, the tenons are engaged in the mortises on the corresponding sides. The first and second closed portions are connected as a whole and remain relatively fixed in the horizontal and vertical directions.

[0007] Furthermore, both the first and second closures have multiple tenons arranged along their length on their adjacent sides, with the gap between adjacent tenons forming a mortise. The tenons on the first and second closures are arranged in an alternating pattern. This further enhances the connection strength and stability between the first and second closures, resulting in higher structural strength for the support tube.

[0008] Furthermore, the tenon has a dovetail structure, and the mortise has a corresponding dovetail groove. By setting the tenon and mortise as irregular structures, the tenon cannot disengage along the opening direction of the mortise after the first and second closing parts are closed, thus further improving the structural strength of the support tube.

[0009] Furthermore, the tenon is a bent L-shaped plate, with the tenon on the first closing part bent vertically and the tenon on the second closing part bent horizontally. This not only ensures the structural strength of the support tube but also makes the bending and closing operation of the support tube smoother.

[0010] Furthermore, the support tube is formed by bending and closing a single plate, with tenons and mortises formed on both sides of the plate along its length. This makes the overall processing and manufacturing of the support tube relatively low-cost and convenient. After forming tenons and mortises on both sides of the plate, bending the plate into a tubular structure allows the tenons to naturally fit into the mortises, making the assembly of the support tube relatively convenient.

[0011] Furthermore, the left and right side walls of the support tube are provided with reinforcing ribs extending vertically. The reinforcing ribs distribute the load borne by the side walls of the support tube, enhance the strength of the support tube, and make the side walls of the support tube less prone to bending deformation under pressure, thus improving stability.

[0012] Furthermore, the bottom of the support tube is provided with a positioning protrusion, which is configured as a positioning foot tube. When the foot tube is installed on the support tube, the positioning protrusion positions the foot tube, making the positions of the foot tubes on multiple sets of support tubes close together, resulting in higher positioning accuracy.

[0013] Secondly, this application provides a chair leg, including multiple leg tubes and a leg tube support base. The leg tubes are hollow tubular structures, with an arc-shaped connection port formed at one end of the leg tube near the support tube. A positioning protrusion is provided at the bottom of the support tube. When the leg tube is fitted onto the support tube, the positioning protrusion abuts against the connection port. The leg tubes are connected to the support tube by a fitting method, making the entire chair leg detachable and the disassembly operation relatively convenient. Furthermore, by providing an arc-shaped connection port on the rear side of the leg tube, the leg tube is less likely to move relative to the support tube when the positioning protrusion abuts against the connection port, resulting in higher positioning accuracy.

[0014] Furthermore, the bottom of the support tube has a threaded hole, and the bottom of the foot tube is hollowed out to form a through hole. The support tube and the foot tube are fixed together by screws. When the positioning protrusion abuts against the connection port, the threaded hole aligns with the through hole, and the screw passes through the through hole and engages with the threaded hole. The connection between the support tube and the foot tube is not only strong, but also easy to install and remove; moreover, the positioning accuracy is high, making the installation operation between the support tube and the foot tube even simpler.

[0015] The leg support base and chair legs provided in this application use a mortise and tenon structure between the first and second closed parts of the support tubes that are inclined to each other. With the help of the mortise and tenon joint, the first closed part closes towards the second closed part and is connected as a whole. This not only ensures precise positioning, but also ensures that when the support tube is subjected to force in the horizontal or vertical direction, the tenon remains against the groove wall of the mortise and tenon, so that the support tube has high structural strength and better stability. Attached Figure Description

[0016] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A three-dimensional structural diagram of the leg support provided in the embodiments of this application; Figure 2 A schematic diagram of the bottom structure of the leg support provided in an embodiment of this application; Figure 3 This is a schematic diagram of the internal structure of the support tube provided in an embodiment of this application; Figure 4 A schematic diagram of the unfolded structure of the support tube provided in an embodiment of this application; Figure 5 A schematic diagram illustrating the state changes of a plate during initial bending, as provided in an embodiment of this application. Figure 6 A schematic diagram illustrating the state changes of a plate when it is fully bent, as provided in an embodiment of this application. Figure 7 A three-dimensional structural diagram of the chair legs provided in an embodiment of this application; Figure 8A schematic diagram of the connection structure between the foot tube and the foot tube support provided in an embodiment of this application; Figure 9 A cross-sectional structural diagram of a chair leg provided in an embodiment of this application; Figure 10 A three-dimensional structural diagram of the central support base provided for existing technology.

[0017] The reference numerals for each figure are as follows: 1-support tube, 1a-first closing part, 1b-second closing part, 110-tenon, 101-threaded hole, 120-mortise, 130-reinforcing rib, 140-positioning protrusion, 2-tapered tube, 3-foot tube, 301-connection port, 302-through hole, 4-tapered tube, 5-branch tube, 510-limiting protrusion, 520-limiting groove. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0019] Please refer to the attached document. Figure 1-9 This application provides a leg support base, including a plurality of support tubes 1 arranged in a circumferential array. Each support tube 1 is a tubular structure formed by bending and closing at least one plate. Each support tube 1 includes two mutually inclined first closed portions 1a and second closed portions 1b. The first closed portions 1a and the second closed portions 1b are closed together by a mortise and tenon structure. The mortise and tenon structure includes a plurality of tenons 110 disposed on the edge of the first closed portion 1a and a plurality of mortises 120 opened on the edge of the second closed portion 1b. When the plate is bent so that the first closed portion 1a closes toward the second closed portion 1b, the tenons 110 are engaged in the mortises 120 on the corresponding side. The first closed portion 1a and the second closed portion 1b are connected as a whole and remain relatively fixed in the horizontal and vertical directions.

[0020] In this embodiment, a mortise and tenon structure is provided between the first closed portion 1a and the second closed portion 1b that are inclined to each other on the support tube 1. With the help of the mortise and tenon joint of the tenon 110 and the mortise 120, the first closed portion 1a is closed towards the second closed portion 1b and connected as a whole. This not only ensures accurate positioning, but also ensures that when the support tube 1 is subjected to a force in the horizontal or vertical direction, the tenon 110 remains in contact with the groove wall of the mortise 120, so that the support tube 1 has high structural strength and better stability.

[0021] Preferably, the chair legs used in this application are five-star legs. The leg support includes a tapered tube 2 in the middle for connecting to the gas spring, and five support tubes 1 arranged in a circular array around the periphery of the tapered tube 2. Each support tube 1 is fitted with a leg tube 3, forming a complete five-star leg. The support tube 1 is a square tube, and the first closed part 1a and the second closed part 1b are approximately vertical. Of course, in other embodiments of this application, the number of support tubes 1 on the leg support can be three, four, six, etc., and the support tubes 1 can also be circular tubes, triangular tubes, pentagonal tubes, etc.

[0022] Please refer to the attached document. Figure 1-3 In some embodiments of this application, a plurality of tenons 110 arranged along the length direction are provided on the side of the first closing part 1a and the second closing part 1b that are close to each other, and the gap between two adjacent tenons 110 forms a mortise 120. The tenons 110 on the first closing part 1a and the second closing part 1b are arranged in an alternating manner. This further improves the connection strength and stability between the first closing part 1a and the second closing part 1b, so that the support tube 1 has higher structural strength.

[0023] Of course, in other embodiments of this application, a single tenon 110 may be provided in one of the first closing portion 1a and the second closing portion 1b, and a mortise 120 may be provided in the other of the first closing portion 1a and the second closing portion 1b.

[0024] Please refer to the attached document. Figure 1-3 In some embodiments of this application, the tenon 110 is a dovetail structure, and the mortise 120 is a corresponding dovetail groove. By setting the tenon 110 and the mortise 120 as irregular structures, after the first closing part 1a and the second closing part 1b are closed, the tenon 110 cannot disengage along the opening direction of the mortise 120, thereby further improving the structural strength of the support tube 1.

[0025] Of course, in other embodiments of this application, the tenon 110 and the mortise 120 can also be irregular structures such as T-shaped grooves and L-shaped grooves.

[0026] Please refer to the attached document. Figure 3 Appendix Figure 5 and attached Figure 6 In some embodiments of this application, the tenon 110 is a bent L-shaped plate, the tenon 110 on the first closed part 1a is bent in the vertical direction, and the tenon 110 on the second closed part 1b is bent in the horizontal direction.

[0027] In this embodiment, because the tenon 110 and the mortise 120 are dovetail-shaped structures, the tenon 110 cannot be directly inserted along the groove direction of the mortise 120. Therefore, by setting the tenon 110 as an L-shaped plate, as shown in the attached figure... Figure 5As shown, when processing the support tube 1, the tenon 110 on the second closed part 1b is first bent into an L-shape, so that the tenon 120 on the second closed part 1b is an L-shaped groove. Then, the plate is bent and rolled into a roll, leaving a gap between the first closed part 1a and the second closed part 1b. Subsequently, as shown in the attached figure... Figure 6 As shown, the first closing part 1a is first further bent so that the horizontal part of the tenon 110 on the first closing part 1a engages with the horizontal part of the mortise 120. Then, the tenon 110 on the first closing part 1a is further bent into an L-shape, causing the vertical part of the tenon 110 to move in a circular motion, thus smoothly engaging from the side of the mortise 120. The tenon 110 is fully engaged in the mortise 120, thereby completely connecting the first closing part 1a and the second closing part 1b into a whole. This not only ensures the structural strength of the support tube 1, but also makes the bending and closing operation of the support tube 1 smoother.

[0028] Preferably, as shown in the appendix Figure 5 As shown, before bending the plate into a roll shape, the tenon 110 on the first closed part 1a is pre-bent so that the horizontal part of the tenon 110 is inclined relative to the vertical part; and as shown in the attached figure Figure 6 As shown, when the horizontal part of the tenon 110 is inserted into the horizontal part of the mortise 120, the vertical part of the tenon 110 is further bent until the tenon 110 is fully inserted into the mortise 120. By pre-bending the tenon 110 on the first closing part 1a, it can bend into an L-shape more smoothly and steadily during subsequent closing, avoiding springback due to excessive bending of the tenon 110 at one time, resulting in higher processing accuracy and further improving the smoothness of the bending and closing operation of the support tube 1.

[0029] Please refer to the attached document. Figure 4-6 In some embodiments of this application, the support tube 1 is formed by bending and closing a single plate. Tenons 110 and mortises 120 are formed on both sides of the plate along its length. This reduces the overall manufacturing cost of the support tube 1 and makes it more convenient. After forming the tenons 110 and mortises 120 on both sides of the plate, bending the plate into a tubular structure allows the tenons 110 to naturally engage with the mortises 120, making the assembly of the support tube 1 more convenient.

[0030] Of course, in other embodiments of this application, the support tube 1 may also be composed of multiple plates spliced ​​together.

[0031] Please refer to the attached document. Figure 1-2 In some embodiments of this application, the left and right side walls of the support tube 1 are provided with reinforcing ribs 130 extending in the vertical direction.

[0032] In this embodiment, during the use of the chair legs, the leg tube 3 exerts a relatively large vertical pressure on the support tube 1. By providing reinforcing ribs 130 on the left and right side walls of the support tube 1, the reinforcing ribs 130 disperse the load borne by the side walls of the support tube 1, enhance the strength of the support tube 1, and make the side walls of the support tube 1 less prone to bending deformation under pressure, thus improving stability.

[0033] Preferably, the side wall of the support tube 1 is formed with recessed reinforcing ribs 130 by stamping, which is relatively easy to process. Two sets of reinforcing ribs 130 are symmetrically arranged on the left and right side walls of the support tube 1, which effectively improves the structural strength of the support tube 1.

[0034] Please refer to the attached document. Figure 2 and attached Figure 9 In some embodiments of this application, a positioning protrusion 140 is provided at the bottom of the support tube 1, and the positioning protrusion 140 is configured as a positioning foot tube 3. When the foot tube 3 is installed on the support tube 1, the positioning protrusion 140 positions the foot tube 3, so that the positions of the foot tubes 3 on multiple sets of support tubes 1 are close, and the positioning accuracy is higher.

[0035] Preferably, the positioning protrusion 140 is made by cutting and folding the bottom part of the support tube 1 downwards, which is relatively easy to process.

[0036] Please refer to the attached document. Figure 7-9 This application embodiment also provides a chair leg, including multiple leg tubes 3 and a leg tube support seat. The leg tube 3 is a hollow tubular structure. One end of the leg tube 3 near the support tube 1 is recessed to form an arc-shaped connection port 301. The bottom of the support tube 1 is provided with a positioning protrusion 140. When the leg tube 3 is sleeved on the support tube 1, the positioning protrusion 140 abuts against the connection port 301.

[0037] In this embodiment, the leg tube 3 is connected to the support tube 1 by a sleeve, which makes the chair leg detachable and the disassembly operation more convenient. Furthermore, by setting an arc-shaped connection port 301 on the rear side of the leg tube 3, when the positioning protrusion 140 abuts against the connection port 301, the leg tube 3 is less likely to move relative to the support tube 1, resulting in higher positioning accuracy.

[0038] Please refer to the attached document. Figure 8-9 In some embodiments of this application, the bottom of the support tube 1 is provided with a threaded hole 101, and the bottom of the foot tube 3 is hollowed out to form a through hole 302; the support tube 1 and the foot tube 3 are fixed by means of screw connection. When the positioning protrusion 140 abuts against the connection port 301, the threaded hole 101 is aligned with the through hole 302, and the screw passes through the through hole 302 and is threadedly engaged with the threaded hole 101.

[0039] In this embodiment, the support tube 1 and the foot tube 3 are fixed together by screws, which not only provides high connection strength but also facilitates assembly and disassembly. Furthermore, when the positioning protrusion 140 abuts against the connection port 301, the threaded hole 101 aligns with the through hole 302, facilitating subsequent screwing operations, ensuring high positioning accuracy, and making the installation of the support tube 1 and the foot tube 3 even simpler.

[0040] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means three or more.

[0041] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A leg support base, characterized in that, The system includes multiple support tubes (1) arranged in a circular array. Each support tube (1) is a tubular structure formed by bending and closing at least one plate. Each support tube (1) includes two mutually inclined first closed parts (1a) and second closed parts (1b). The first closed parts (1a) and the second closed parts (1b) are closed together by a mortise and tenon structure. The mortise and tenon structure includes several tenons (110) provided on the edge of the first closed part (1a) and several mortises (120) opened on the edge of the second closed part (1b). When the plate is bent so that the first closed part (1a) closes toward the second closed part (1b), the tenons (110) are engaged in the mortises (120) on the corresponding side. The first closed part (1a) and the second closed part (1b) are connected as a whole and remain relatively fixed in the horizontal and vertical directions.

2. The leg support according to claim 1, characterized in that, The first closing part (1a) and the second closing part (1b) are provided with a plurality of tenons (110) arranged along the length direction on the side close to each other, and the gap between two adjacent tenons (110) forms the mortise (120). The tenons (110) on the first closing part (1a) and the second closing part (1b) are arranged alternately.

3. The leg support according to claim 2, characterized in that, The tenon (110) has a dovetail structure, and the mortise (120) is a corresponding dovetail groove.

4. The leg support according to claim 2, characterized in that, The tenon (110) is a bent L-shaped plate. The tenon (110) on the first closed part (1a) is bent in the vertical direction, and the tenon (110) on the second closed part (1b) is bent in the horizontal direction.

5. The leg support according to claim 1, characterized in that, The support tube (1) is formed by bending and closing a single plate, and the plate has the tenon (110) and the mortise (120) formed on both sides of the length direction.

6. The leg support according to claim 1, characterized in that, The left and right side walls of the support tube (1) are provided with reinforcing ribs (130) extending in the vertical direction.

7. The leg support according to claim 1, characterized in that, The bottom of the support tube (1) is provided with a positioning protrusion (140), which is configured as a positioning foot tube (3).

8. A chair leg, characterized in that, It includes multiple leg tubes (3) and a leg tube support as described in any one of claims 1-7. The leg tube (3) is a hollow tubular structure. One end of the leg tube (3) near the support tube (1) is recessed to form an arc-shaped connection port (301). The bottom of the support tube (1) is provided with a positioning protrusion (140). When the leg tube (3) is sleeved on the support tube (1), the positioning protrusion (140) abuts against the connection port (301).

9. The chair leg according to claim 8, characterized in that, The bottom of the support tube (1) is provided with a threaded hole (101), and the bottom of the foot tube (3) is hollowed out to form a through hole (302); the support tube (1) and the foot tube (3) are fixed by screw connection. When the positioning protrusion (140) abuts against the connection port (301), the threaded hole (101) is aligned with the through hole (302), and the screw passes through the through hole (302) and is threadedly engaged with the threaded hole (101).

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