Chair foot and seat facilitating installation

Abstract

The utility model discloses a chair leg and seat convenient to installation, and the chair leg includes base and a plurality of chair leg support rods, and the base includes base body and a plurality of plugs that are uniformly distributed on the base body in the circumferential direction, and the number of plugs matches the number of chair leg support rods, each chair leg support rod has a sleeve-shaped plug-in part for plugging with the corresponding plug, a clamping connection structure is arranged between the plug and the sleeve-shaped plug-in part, so that the chair leg support rod and the base are detachably connected, the chair leg support rod can be separated from the base during the transportation and packaging of the seat, thereby saving transportation space and cost, during the assembly of the chair leg, the sleeve-shaped support part and the corresponding plug are directly plugged in, the elastic clamping piece is clamped into the clamping hole, and screw locking is not needed, and the assembly efficiency and convenience of the chair leg assembly are improved.

Description

Technical Field

[0001] This utility model relates to the field of seating, and in particular to a chair leg and seat that are easy to install. Background Technology

[0002] Most office chairs or ergonomic chairs are equipped with chair legs. Chair legs typically consist of a base for inserting the height adjustment gas spring and multiple tubular support rods evenly distributed around the base. Casters are usually installed at the outermost ends of the support rods to facilitate chair movement.

[0003] Some chair leg support rods are welded and fixed to the base to ensure the support strength of the chair legs. However, chair legs made in this way take up a lot of space during transportation, increasing the transportation cost of the chair. Therefore, some chairs have set the support rods of the chair legs and the base as a separate structure. For example, in the chair leg patent with publication number CN220157903U, there is a positioning frame and several leg tubes, each of which is fitted onto the positioning tube of the positioning frame. The outer wall of the positioning tube has a threaded hole that extends to the reinforcing protrusion. Locking screws are inserted through the leg tubes and locked into the threaded holes to fix the leg tubes to the positioning frame. With this type of chair leg, the leg tubes can be removed during transportation to save transportation space and cost. However, when assembling the chair legs after receiving the goods, it is still necessary to insert screws between the fitted leg tubes and the positioning tubes and repeat the screw tightening process multiple times. The assembly efficiency and convenience still need to be improved. Summary of the Invention

[0004] This utility model provides an easy-to-install chair leg and seat. By setting a snap-fit ​​connection structure between the plug and the sleeve-shaped connector, the chair leg support rod can be detachably connected to the base. When the seat is transported and packed, the chair leg support rod can be separated from the base, saving transportation space and costs. When assembling the chair leg, the sleeve-shaped support part and the corresponding plug can be directly plugged in to allow the elastic snap-fit ​​part to snap into the locking hole without the need for screw tightening, which improves the assembly efficiency and convenience of the chair leg assembly.

[0005] The technical solution of this utility model is implemented as follows: An easy-to-install chair leg includes a base and a plurality of chair leg support rods. The base includes a base body and a plurality of plugs evenly distributed circumferentially on the base body. The number of plugs matches the number of chair leg support rods. Each chair leg support rod has a sleeve-shaped plug-in portion for plugging into a corresponding plug. A snap-fit ​​connection structure is provided between the sleeve-shaped plug-in portion and the corresponding plug. The snap-fit ​​connection structure includes an elastic snap-fit ​​member disposed on the plug and protruding from the outer wall of the plug, and a snap hole disposed on the sleeve-shaped plug-in portion. When the plug is inserted into the sleeve-shaped connector, the elastic locking element deforms elastically and contacts and presses against the inner wall of the sleeve-shaped connector; when the plug is fully inserted into the sleeve-shaped connector, the elastic locking element resets and locks into the locking hole to prevent the chair leg support rod from detaching from the base along its own length.

[0006] Preferably, the elastic snap-fit ​​component includes a snap-fit ​​protruding from the outer wall of the plug and an elastic connecting part integrally formed between the snap-fit ​​and the outer wall of the plug; when the plug is inserted into the sleeve-shaped plug, the elastic connecting part bends and deforms, causing the snap-fit ​​to contact the inner wall of the sleeve-shaped plug; when the plug and the sleeve-shaped plug are in place, the elastic connecting part resets and the snap-fit ​​engages with the snap-fit ​​hole.

[0007] Preferably, the outer wall of the plug is provided with a relief groove corresponding to the elastic snap-fit ​​component. The elastic connection part is integrally formed on the inner wall of the relief groove. When the elastic connection part is bent and deformed, the relief groove avoids the elastic connection part and the snap-fit ​​component. The relief groove can reduce the weight and cost of the plug while providing room for the elastic snap-fit ​​component to move, and avoid interference between the elastic connection part and the plug when the elastic part is elastically deformed.

[0008] Preferably, the root of the elastic connector is integrally formed with a reinforcing rib between the connector and the plug to improve the connection strength between the elastic connector and the plug.

[0009] Preferably, the elastic snap-fit ​​component protrudes from the bottom surface of the plug, and the corresponding snap-fit ​​hole is provided through the bottom surface of the sleeve-shaped plug-in part; so as to hide the snap-fit ​​connection structure and make the chair leg look beautiful.

[0010] Preferably, the elastic snap-fit ​​component has a guide slope facing the sleeve-shaped insertion portion, and the sleeve-shaped insertion portion contacts and presses against the guide slope to cause the elastic snap-fit ​​component to elastically deform, making the insertion connection between the two smoother.

[0011] Preferably, the elastic locking component includes a locking pin and an elastic element disposed between the locking pin and the plug. The outer wall of the plug has a recessed pin hole, and the locking pin passes through the pin hole and protrudes out of the opening of the pin hole. When the plug is inserted into the sleeve-shaped plug part, the elastic element elastically deforms and makes the locking pin contact the inner wall of the sleeve-shaped plug part. When the plug and the sleeve-shaped plug part are inserted into place, the elastic element resets and makes the locking pin lock into the locking hole.

[0012] Preferably, the elastic element is a compression spring disposed in the pin hole and acting on the locking pin; or, the elastic element is a spring sheet integrally formed with the locking pin and connected to the plug.

[0013] As a preferred elastic connection part, an elastic block is fixed on the outer wall of the plug. When the plug is inserted into the sleeve-shaped plug part, the elastic block deforms elastically as a whole and contacts the inner wall of the sleeve-shaped plug part. When the plug and the sleeve-shaped plug part are inserted into place, the elastic block elastically resets and snaps into the locking hole.

[0014] A chair, including the aforementioned easy-to-install chair legs.

[0015] The beneficial effects of this utility model, which adopts the above technical solution, are as follows: This invention features a snap-fit ​​connection structure between the tubular plug and the connector, enabling a screwless locking connection between the chair leg support rod and the base. When the user is seated with the chair leg support rod and base in a separated state, a simple insertion process is all that is needed to engage the elastic snap-fit ​​part with the snap-fit ​​hole, allowing multiple chair leg support rods to be connected to their corresponding connectors one by one, thus improving the convenience and efficiency of chair leg assembly.

[0016] The outer wall of the connector is provided with a clearance groove. The elastic connection part connected to the buckle is integrally formed on the inner wall of the clearance groove. The clearance groove can reduce the weight and cost of the base. When the elastic connection part is bent and deformed, the clearance groove can provide space for the elastic buckle to move, avoiding interference between the elastic connection part and the buckle and the plug, ensuring that the plug can be properly connected to the sleeve-shaped connector. The design is ingenious and achieves multiple benefits.

[0017] The flexible snap-fit ​​connector and snap-fit ​​hole are respectively located on the bottom surface of the plug and the bottom surface of the sleeve-shaped plug. When the chair legs are assembled, the bottom surface is difficult to see, making the assembled chair legs look smooth and beautiful, indirectly improving the aesthetics of the chair. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the shape of the chair legs; Figure 2 An exploded view of the chair legs; Figure 3 This is an enlarged view of the structure of the sleeve-shaped plug and the connector. Figure 4 This is a schematic diagram of the base structure; Figure 5 This is a cross-sectional view of the sleeve-shaped connector separated from the plug. Figure 6 This is a cross-sectional view of the sleeve-shaped connector and the plug in place. Figure 7 A schematic diagram showing multiple card slots and elastic clips; Figure 8 This is a cross-sectional view of the latch and spring clip on the plug in Embodiment 2; Figure 9 This is a cross-sectional view of the plug with the locking pin and the compression spring arranged on it, as shown in Example 2. Figure 10 This is a schematic diagram of the elastic snap-fit ​​component being an elastic block in Example 3; The reference numerals in the attached drawings are as follows: 1-base, 11-plug, 12-insertion hole, 13-positioning part, 14-elastic snap-fit ​​part, 14a-buckle, 14b-elastic connection part, 141-pin, 142-elastic element, 15-guide slope, 16-reinforcing rib, 17-avoidance groove, 2-chair leg support rod, 21-sleeve insertion part, 22-snap hole, 23-positioning notch, 3-cover, 31-side baffle. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide 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 scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0021] The specific embodiments of this utility model are as follows: Example 1: As Figure 1-7 As shown, this embodiment provides an easy-to-install chair leg, typically used in office chairs or ergonomic chairs. It includes a base 1 and multiple chair leg support rods 2. The base 1 includes a base body and multiple plugs 11 evenly distributed circumferentially on the base body. The base body and plugs 11 can be molded plastic parts, or they can be welded from metal materials. The number of plugs 11 matches the number of chair leg support rods 2. The plugs 11 can be solid structures made of plastic or hollow structures made of steel pipes. The base body has through-holes 12 for inserting lifting gas springs. Each chair leg support rod 2 has a sleeve-shaped insertion part 21 for inserting into a corresponding plug 11. The length can be less than the overall length of the chair leg support rod 2, or it can be equal to the length of the chair leg support rod 2, so that the entire chair leg support rod 2 is a tubular structure; the cross-sectional shape of the plug 11 is usually square, and the inner hole shape of the sleeve-shaped plug part 21 matches the cross-sectional shape of the plug 11, which facilitates the plug 1 and the sleeve-shaped plug part 21 to be plugged in, while also restricting the chair leg support rod 2 from rotating relative to the plug 11 along its own axis; at the same time, in order to realize the screwless connection between the sleeve-shaped plug part 21 and the plug 11, a snap-fit ​​connection structure is provided between the sleeve-shaped plug part 21 and the corresponding plug 11. The snap-fit ​​connection structure includes an elastic snap-fit ​​member 14 provided on the plug 11 and protruding from the outer wall of the plug 11, and a snap hole 22 provided on the sleeve-shaped plug part 21. When the chair leg support rod 2 begins to be assembled, the plug 11 is inserted into the sleeve-shaped connector 21. The elastic locking member 14 can elastically deform under external force. At this time, the elastic locking member 14 has gradually entered into the sleeve-shaped connector 21 and is in contact with and pressed against the inner wall of the sleeve-shaped connector 21; Figure 6 As shown, when the plug 11 is inserted into the sleeve-shaped connector 21, the elastic snap-fit ​​member 14 and the snap-fit ​​hole 22 are exactly aligned. At this time, the elastic snap-fit ​​member 14 resets and snaps into the snap-fit ​​hole 22 to prevent the chair leg support rod 2 from detaching from the base 1 along its own length. Then, the above assembly process is repeated to assemble multiple chair leg support rods 2 one by one with the base 1. Compared with screw installation, the snap-fit ​​installation in this embodiment does not require a long time to tighten screws, further improving the assembly efficiency and convenience of the chair leg support rod 2 and the base 1.

[0022] Furthermore, in this embodiment, the elastic snap-fit ​​component 14 includes a snap-fit ​​14a protruding from the outer wall of the plug 11 and an elastic connecting portion 14b integrally formed between the snap-fit ​​14a and the outer wall of the plug 11. The elastic connecting portion 14b is preferably sheet-shaped to facilitate bending and deformation. When the plug 11 is inserted into the sleeve-shaped plug 21, the elastic connecting portion 14b bends and deforms, causing the snap-fit ​​14a to contact the inner wall of the sleeve-shaped plug 21. When the plug 11 and the sleeve-shaped plug 21 are in place, the elastic connecting portion 14b resets and the snap-fit ​​14a engages with the snap hole 22, thereby limiting the chair leg support rod 2 from moving away from the base 1 along its own length direction.

[0023] Furthermore, such as Figure 5 As shown, to facilitate the bending and deformation of the elastic connection part 14b, the outer wall of the plug 11 is provided with a relief groove 17 corresponding to the elastic snap-fit ​​member 14. Since the base 1 in this embodiment is a plastic molded part, in order to facilitate demolding and reduce the weight and cost of the base 1, the relief groove 17 passes through the plug 11. The elastic connection part 14b is integrally formed on the inner wall of the relief groove 17. When the elastic connection part 14b is bent and deformed, the relief groove 17 avoids the elastic connection part 14b and the snap-fit ​​member 14a. The relief groove 17 can provide room for the elastic snap-fit ​​member 14 to move while reducing the weight and cost of the plug 11, and avoid interference between the elastic connection part 14b and the plug 11 when the elastic deformation occurs.

[0024] Furthermore, in order to improve the connection strength between the elastic connection 14b and the plug 11 while ensuring normal elastic deformation of the elastic connection 14b, and to prevent the elastic connection 14b from breaking, such as... Figure 4-5As shown, a reinforcing rib 16 is integrally formed between the root of the elastic connecting part 14b and the plug 11. The reinforcing rib 16 is located near the root of the elastic connecting part 14b and at the end away from the buckle 14a. The connection length between the reinforcing rib 16 and the elastic connecting part 14b is less than the length of the entire elastic snap-fit ​​14. While ensuring that the elastic connecting part 14b can bend and deform normally, it can effectively improve the connection strength between the elastic connecting part 14b and the plug 11.

[0025] Furthermore, in this embodiment, the cross-sectional shape of the plug 11 is square. The elastic snap-fit ​​14 can protrude from any of the top, bottom, or side walls of the plug. However, to ensure the aesthetic appearance of the assembled chair leg, the elastic snap-fit ​​14 in this embodiment protrudes from the bottom surface of the plug 11, and the corresponding snap hole 22 of the elastic connecting part 14b is disposed through the bottom surface of the sleeve-shaped plug 21. Specifically, the clearance groove 17 is disposed vertically through the plug 11, and the elastic connecting part 14b is integrally formed in the lower part of the inner wall of the clearance groove 17, with the buckle 14a protruding from the lower opening of the clearance groove 17, so that the elastic snap-fit ​​14 protrudes from the bottom surface of the plug 11. After the chair leg is assembled, the elastic snap-fit ​​14 on the bottom surface of the plug 11 and the snap hole 22 on the bottom surface of the sleeve-shaped plug 21 face the ground and are difficult to see, thereby hiding the snap-fit ​​connection structure and making the assembled chair leg simple and beautiful.

[0026] Furthermore, when assembling the chair leg support rod 2 and the plug 11, the elastic snap-fit ​​member 14 can be manually pressed and its elastic deformation can be achieved so that the plug 11 can be inserted into the sleeve-shaped plug part 21. However, manual pressing is relatively laborious. Therefore, in this embodiment, the elastic snap-fit ​​member 14 has a guide slope 15 facing the sleeve-shaped plug part 21. During assembly, it is only necessary to bring the sleeve-shaped plug part 21 close to the plug 11 and make the end facing the plug 11 contact and press with the guide slope 15 to cause the elastic snap-fit ​​member 14 to elastically deform. This reduces the difficulty of assembling the chair leg support rod 2 and the plug 11 and makes the insertion of the sleeve-shaped plug part 14b and the plug 11 smoother.

[0027] Furthermore, to facilitate the positioning of the sleeve-shaped plug 21 and the plug 11 during insertion, a positioning part 13 is integrally formed between the plug 11 and the base body. The base body has an annular outer peripheral surface for integrally connecting multiple plugs 11. The positioning part 13 is located between the annular outer peripheral surface and the outer wall of the plug 11. A positioning notch 23 is provided on the end of the sleeve-shaped plug 21 facing the plug 11. When the plug 11 and the sleeve-shaped plug 21 are inserted into place, the corresponding positioning part 13 is engaged with the positioning notch 23.

[0028] Furthermore, to enhance the connection strength between the base body and the multiple plugs 11, the two adjacent positioning parts 13 are connected as one unit, and a reinforcing rib is formed between each two adjacent plugs 11, thereby further improving the structural strength of the base 1.

[0029] Furthermore, such as Figure 1-6 As shown, in this embodiment, the number of locking holes 22 and elastic locking members 14 can be a single; to increase the locking connection strength, the number of locking holes 22 and elastic locking members 14 can also be multiple, such as... Figure 7 As shown, when multiple locking holes 22 are provided on the bottom surface of the sleeve-shaped plug 21, the multiple locking holes 22 are arranged at intervals along the width direction of the sleeve-shaped plug 21 to improve the connection strength between the chair leg support rod 2 and the base 1; or, without considering the appearance of the chair leg, multiple elastic locking pieces 14 can be provided on different side walls of the plug 11, and the positions of the locking holes 22 correspond one-to-one with the positions of the multiple elastic locking pieces 14.

[0030] Furthermore, to enhance the aesthetics of the chair legs, the chair legs also include a cover 3, such as... Figure 1-2 As shown, the cover 3 includes a cover plate with a through hole that covers the upper surface of the base body. The through hole corresponds to the position of the insertion hole 12 to avoid the lifting gas rod. In this embodiment, the area of ​​the cover plate is larger than the area of ​​the upper surface of the base body. Multiple side baffles 31 are arranged circumferentially and extending downward from the edge of the cover plate. Each side baffle 31 covers the corresponding reinforcing rib plate, and an avoidance area is formed between every two adjacent side baffles 31 to avoid the chair leg support rod 2.

[0031] Furthermore, a seat is provided, including the aforementioned easy-to-install chair legs. The seat also includes a seat and a lifting gas spring. The seat typically has a seat chassis, and the seat chassis is also provided with insertion holes. The two ends of the lifting gas spring are respectively inserted into the insertion holes and the insertion holes 12.

[0032] Example 2: As Figure 8-9 As shown, this embodiment differs from the above embodiments in that the elastic locking member 14 in this embodiment includes a locking pin 141 and an elastic member 142 disposed between the locking pin 141 and the plug 11. The plug 11 has a recessed pin hole on its outer wall, and the locking pin 141 passes through the pin hole and protrudes out of the opening of the pin hole. To facilitate the insertion of the plug 11 and the chair leg support rod 2, the guide slope 15 can also be provided on the locking pin 141. The elastic member 142 can be a spring piece integrally formed with the locking pin 141 and connected to the plug 11, such as... Figure 8 As shown, to conceal the spring piece, this embodiment provides a relief groove 17 communicating with the pin hole. The relief groove 17 is open outward, and the spring piece can be fixedly installed in the relief groove 17. When the plug 11 is inserted into the sleeve-shaped plug part 21, the spring piece, as an elastic element 142, elastically deforms and makes the locking pin 141 contact the inner wall of the sleeve-shaped plug part 21. At this time, the spring piece bends and deforms, and the locking pin 141 elastically retracts. When the plug 11 is inserted into the sleeve-shaped plug part 21, the spring piece resets and the locking pin 141 is engaged in the locking hole 22, achieving the same effect as in the above embodiment.

[0033] Furthermore, such as Figure 9 As shown, if the clearance groove 17 is not provided, the spring can be replaced with a compression spring in the pin hole. Specifically, in this embodiment, first and second limiting protrusions can be provided on the outer wall of the locking pin 141 and the inner wall of the pin hole respectively to form a limiting structure. The first and second limiting protrusions abut against each other to restrict the locking pin 141 from disengaging from the mounting seat. A compression spring acting on the locking pin 141 can be provided in the pin hole. Alternatively, an elastic telescopic component can be installed in the pin hole. The elastic telescopic component includes a hollow mounting seat that is interference-fitted with the pin hole and a component slidably connected to the mounting seat. The device includes a locking pin 141, and a limiting structure is also provided between the outer wall of the locking pin 141 and the inner wall of the mounting base. A compression spring is provided inside the mounting base, acting on the end face of the locking pin 141. When the plug 11 is inserted into the sleeve-shaped plug part 21, the compression spring, which is an elastic element 142, elastically deforms and makes the locking pin 141 contact the inner wall of the sleeve-shaped plug part 21. At this time, the locking pin 141 elastically retracts. When the plug 11 is inserted into the sleeve-shaped plug part 21, the compression spring resets and makes the locking pin 141 engage with the locking hole 22, achieving the same effect as in the above embodiment.

[0034] Example 3: As Figure 10 As shown, the difference between this embodiment and the above embodiment is that the elastic connecting part 14b in this embodiment is an elastic block fixed on the outer wall of the plug 11. The elastic block can be a plastic block or a rubber block with good elasticity. The elastic block can be fixed to the corresponding position on the outer wall of the plug 1 by fitting or screw connection. When the plug 11 is inserted into the sleeve-shaped plug part 21, the elastic block deforms elastically as a whole and contacts the inner wall of the sleeve-shaped plug part 21. When the plug 11 and the sleeve-shaped plug part 21 are inserted into place, the elastic block elastically resets and is locked into the locking hole 22, achieving the same effect as in the above embodiment.

[0035] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A chair leg that is easy to install, characterized in that, The device includes a base (1) and multiple chair leg support rods (2). The base (1) includes a base body and multiple plugs (11) evenly distributed around the base body. The number of plugs (11) matches the number of chair leg support rods (2). Each chair leg support rod (2) has a sleeve-shaped plug part (21) for plugging into the corresponding plug (11). A snap-fit ​​connection structure is provided between the sleeve-shaped plug part (21) and the corresponding plug (11). The snap-fit ​​connection structure includes an elastic snap-fit ​​member (14) provided on the plug (11) and protruding from the outer wall of the plug (11), and a snap hole (22) provided on the sleeve-shaped plug part (21). When the plug (11) is inserted into the sleeve-shaped plug part (21), the elastic snap-fit ​​member (14) deforms elastically and contacts and presses against the inner wall of the sleeve-shaped plug part (21); when the plug (11) is inserted into the sleeve-shaped plug part (21), the elastic snap-fit ​​member (14) resets and snaps into the card hole (22) to restrict the chair leg support rod (2) from detaching from the base (1) along its own length direction.

2. The chair legs for easy installation according to claim 1, characterized in that: The elastic snap-fit ​​component (14) includes a snap-fit ​​(14a) protruding from the outer wall of the plug (11) and an elastic connecting part (14b) integrally formed between the snap-fit ​​(14a) and the outer wall of the plug (11); when the plug (11) is inserted into the sleeve-shaped plug (21), the elastic connecting part (14b) bends and deforms and makes the snap-fit ​​(14a) contact the inner wall of the sleeve-shaped plug (21); when the plug (11) and the sleeve-shaped plug (21) are in place, the elastic connecting part (14b) resets and makes the snap-fit ​​(14a) snap into the card hole (22).

3. The chair legs for easy installation according to claim 2, characterized in that: The outer wall of the plug (11) is provided with a relief groove (17) corresponding to the elastic snap fastener (14). The elastic connecting part (14b) is integrally formed on the inner wall of the relief groove (17). When the elastic connecting part (14b) is bent and deformed, the relief groove (17) avoids the elastic connecting part (14b) and the snap fastener (14a).

4. The chair legs for easy installation according to claim 2, characterized in that: The root of the elastic connection (14b) is integrally formed with a reinforcing rib (16) between the plug (11).

5. The chair legs for easy installation according to claim 1, characterized in that: The elastic snap-fit ​​member (14) protrudes from the bottom surface of the plug (11), and the corresponding snap-fit ​​hole (22) is disposed through the bottom surface of the sleeve-shaped plug (21).

6. The chair legs for easy installation according to claim 1, characterized in that: The elastic snap-fit ​​member (14) has a guide slope (15) facing the sleeve-shaped plug portion (21), and the sleeve-shaped plug portion (21) contacts and presses against the guide slope (15) to cause the elastic snap-fit ​​member (14) to elastically deform.

7. The chair legs for easy installation according to claim 1, characterized in that: The elastic snap-fit ​​component (14) includes a snap-fit ​​pin (141) and an elastic element (142) disposed between the snap-fit ​​pin (141) and the plug (11). The outer wall of the plug (11) is provided with a recessed pin hole. The snap-fit ​​pin (141) passes through the pin hole and protrudes out of the opening of the pin hole. When the plug (11) is inserted into the sleeve-shaped plug part (21), the elastic element (142) elastically deforms and makes the snap-fit ​​pin (141) contact the inner wall of the sleeve-shaped plug part (21). When the plug (11) and the sleeve-shaped plug part (21) are inserted into place, the elastic element (142) resets and makes the snap-fit ​​pin (141) snap into the snap-fit ​​hole (22).

8. The chair legs for easy installation according to claim 7, characterized in that: The elastic element (142) is a compression spring disposed in the pin hole and acting on the locking pin (141); or, the elastic element (142) is a spring sheet integrally formed with the locking pin (141) and connected to the plug (11).

9. The chair legs for easy installation according to claim 1, characterized in that: The elastic connection part (14b) is an elastic block fixed on the outer wall of the plug (11). When the plug (11) is inserted into the sleeve-shaped plug part (21), the elastic block deforms elastically as a whole and contacts the inner wall of the sleeve-shaped plug part (21). When the plug (11) and the sleeve-shaped plug part (21) are inserted into place, the elastic block is elastically reset and snaps into the card hole (22).

10. A type of seat, characterized in that, Includes the easy-to-install chair legs as described in claim 1.

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