Seat pan with locking function

Abstract

This utility model discloses a seat chassis with a locking function, relating to the field of seat technology, including a seat cushion; a bottom seat installed at the center of the bottom of the seat cushion by screws; an expansion self-locking structure that is locked and fixed inside the bottom seat and extends to the outside of the bottom seat; a supporting metal rod penetrating the expansion self-locking structure; a threaded rod extending to the outside of the inner bottom of the expansion self-locking structure is threadedly connected to the inner bottom of the expansion self-locking structure; a bottom metal block is installed at the bottom of the threaded rod; a supporting metal rod is penetrating inside the threaded rod and the bottom metal block; and a movable structure is installed on the outside of the bottom metal block. This utility model, by rotating the threaded rod, can simultaneously drive multiple parts of the outer wall of the expansion cushion to move inward, applying a constant compressive force to multiple parts of the outer wall of the metal rod penetrating inward, thereby achieving the installation and fixation of the metal rod. The entire installation and disassembly process is simple, convenient, and highly efficient.

Description

Technical Field

[0001] This utility model relates to the field of seat technology, specifically a seat chassis with locking function. Background Technology

[0002] The seat chassis is a core component of an ergonomic chair, directly affecting its support, comfort, and lifespan. During assembly, the metal rod supporting the seat chassis needs to be installed at the bottom of the chassis. This metal rod connects the seat chassis to the seat base, thus securing the entire chair in place.

[0003] Currently, traditional seat chassis have the following problems:

[0004] Existing seat chassis typically use multiple bolts to assemble and secure the metal rods supporting the chassis. This traditional method results in a complex assembly process and low installation efficiency. Furthermore, subsequent disassembly requires removing multiple bolts, making the process cumbersome and inconvenient. Utility Model Content

[0005] The purpose of this invention is to provide a seat chassis with a locking function to solve the problems mentioned in the background art.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a seat chassis with a locking function, including a seat cushion; a bottom seat installed at the center of the bottom of the seat cushion by screws; an expansion self-locking structure that is locked and fixed inside the bottom seat and extends to the outside of the bottom seat; and a support metal rod passing through the expansion self-locking structure.

[0008] The inner bottom of the expansion self-locking structure is threadedly connected to a threaded rod extending to the outside. A bottom metal block is installed at the bottom of the threaded rod. A supporting metal rod is installed through the threaded rod and the bottom metal block. A movable structure is installed on the outside of the bottom metal block.

[0009] Preferably, the expansion self-locking structure includes: an outer shell that is locked and fixed inside the bottom seat; an inner shell that is installed and fixed inside the outer shell and extends to the bottom of the outer shell; a blocking protrusion installed inside the inner shell; and an expansion body disposed inside the inner shell and located inside the blocking protrusion.

[0010] A supporting metal rod is installed through the interior of the expansion body.

[0011] Preferably, the outer wall of the expansion body has multiple inclined portions, and a conical protrusion is provided at the center of the bottom of the inclined portion, and a supporting metal rod is provided through the interior of the conical protrusion.

[0012] Preferably, an elastic reinforcing rib is provided at the bottom of the outer center position of the expansion body, and the elastic reinforcing rib is located below the blocking protrusion.

[0013] Preferably, the threaded rod is threaded to the inner bottom of the inner housing, the threaded rod is movably disposed below the expansion body, a conical groove is provided at the center of the top of the threaded rod, the conical groove matches the conical protrusion structure, and a first inclined surface is provided at the contact portion of the conical groove and the conical protrusion.

[0014] Preferably, the movable structure includes: an embedded metal ring sleeved and fixed to the outside of the bottom metal block; and a push rod installed on one side of the embedded metal ring, wherein a rubber sleeve is provided on the outside of the bottom of the push rod.

[0015] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0016] The seat chassis with locking function proposed in this utility model, when assembling the seat chassis and the metal rod supporting the seat chassis, applies a vertical force to the expansion body by rotating the threaded rod. This causes multiple parts of the outer wall of the expansion body to move inward simultaneously, applying a constant compressive force to multiple parts of the outer wall of the metal rod penetrating the inner side of the expansion body. This completes the installation and positioning of the metal rod. The entire installation process is simple, convenient, and efficient. Similarly, during disassembly, the movable rod can be turned by applying reverse force, making the disassembly process convenient and effective. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0018] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0019] Figure 1 This is a structural diagram of the present invention after overall assembly;

[0020] Figure 2 This is a sectional view of the entire assembly of this utility model;

[0021] Figure 3 This is a front sectional view of the completed assembly of this utility model;

[0022] Figure 4 This is a cross-sectional structural diagram showing the connection between the expansion self-locking structure and the supporting metal rod of this utility model;

[0023] Figure 5 This is an exploded cross-sectional view of the connection between the expansion body and the bottom metal block of this utility model;

[0024] In the picture:

[0025] 10. Seat cushion; 20. Base seat; 30. Expansion self-locking structure; 301. Outer shell; 302. Inner shell; 303. Blocking protrusion; 304. Expansion body; 3041. Sloping part; 3042. Conical protrusion; 3043. Elastic reinforcing rib; 40. Supporting metal rod; 50. Threaded rod; 500. Conical groove; 5001. First inclined surface; 501. Bottom metal block; 60. Movable structure; 601. Embedded metal ring; 602. Push rod; 603. Rubber sleeve. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0027] Please see Figures 1-5 A seat chassis with locking function includes a seat cushion 10; a bottom seat 20 installed at the center of the bottom of the seat cushion 10 by screws; an expansion self-locking structure 30 that is locked and fixed inside the bottom seat 20 and extends to the outside of the bottom seat 20; a support metal rod 40 passing through the expansion self-locking structure 30; a threaded rod 50 extending to the outside of the inner bottom of the expansion self-locking structure 30; a bottom metal block 501 installed at the bottom of the threaded rod 50; the support metal rod 40 passing through the interior of the threaded rod 50 and the bottom metal block 501; and a movable structure 60 installed on the outside of the bottom metal block 501.

[0028] In actual use, the above solution first inserts the support metal rod 40 into the expansion self-locking structure 30. Then, the movable structure 60 is moved, causing the threaded rod 50 and the bottom metal block 501 connected to the movable structure 60 to rotate. Through the rotation of the threaded rod 50 and the bottom metal block 501, and the design of the threaded connection between the threaded rod 50 and the expansion self-locking structure 30, the top of the threaded rod 50 is moved upward, and the internal structure of the expansion self-locking structure 30 on the inner side of its top is squeezed, so that the expansion self-locking structure 30 is squeezed inward, and the squeezing force for fixing is applied to multiple positions on the outer wall of the support metal rod 40 that penetrates the inner side, thus completing the assembly and fixing of the support metal rod 40 and the seat cushion 10.

[0029] For details, please refer to the following: Figure 4 The expansion self-locking structure 30 includes: an outer shell 301 that is locked and fixed inside the bottom seat 20; an inner shell 302 that is installed and fixed inside the outer shell 301 and extends to the bottom of the outer shell 301; a blocking protrusion 303 installed inside the inner shell 302; and an expansion body 304 disposed inside the inner shell 302 and located inside the blocking protrusion 303, wherein a supporting metal rod 40 is provided through the interior of the expansion body 304.

[0030] In this design, an elastic reinforcing rib 3043 is fitted at the bottom of the outer center of the expansion body 304, and the elastic reinforcing rib 3043 is positioned below the blocking protrusion 303.

[0031] The seat chassis with locking function of this utility model, when multiple parts of the expansion body 304 are squeezed inward, will squeeze the supporting metal rod 40 that runs through the expansion body 304, thereby fixing the supporting metal rod 40 in place. The design of the elastic reinforcing rib 3043 can reduce the amount of displacement of the expansion body 304 when it is released from fixation, restricting the state of the expansion body 304 and ensuring that the expansion body 304 is always in a stable state.

[0032] For details, please refer to the following: Figure 4 and Figure 5 The outer wall of the expansion body 304 has multiple inclined portions 3041, and a conical protrusion 3042 is provided at the center of the bottom of the inclined portion 3041. A supporting metal rod 40 is provided through the interior of the conical protrusion 3042.

[0033] In this design, the threaded rod 50 is threaded to the inner bottom of the inner housing 302. The threaded rod 50 is movably positioned below the expansion body 304. A tapered groove 500 is provided at the center of the top of the threaded rod 50. The tapered groove 500 matches the structure of the tapered protrusion 3042. A first inclined surface 5001 is provided at the contact portion between the tapered groove 500 and the tapered protrusion 3042.

[0034] The seat chassis with locking function of this utility model, when the threaded rod 50 rotates and moves upward due to the threaded connection structure, will drive the conical groove 500 provided on the top of the threaded rod 50 to move to the outer wall of the conical protrusion 3042. Through the design of the first inclined surface 5001 of the connection part between the conical protrusion 3042 and the conical groove 500, an oblique extrusion force is applied to the conical protrusion 3042, causing the expansion body 304 to move inward and extruding and fixing the supporting metal rod 40 inside the expansion body 304.

[0035] In this design, the threaded connection between the inner housing 302 and the threaded rod 50 is designed with a 30° wedge-shaped slope at the root of the thread, which increases the normal pressure to 1.7 times that of ordinary threads, increases the friction when connected with the threaded rod 50, and achieves locking of the threaded rod 50.

[0036] For details, please refer to the following: Figure 2 The movable structure 60 includes: an embedded metal ring 601 that is sleeved and fixed on the outside of the bottom metal block 501; a push rod 602 installed on one side of the embedded metal ring 601, and a rubber sleeve 603 is provided on the outside of the bottom of the push rod 602.

[0037] The seat chassis with locking function of this utility model, when the threaded rod 50 is rotated and displaced, the push rod 602 is manually moved, which drives the embedded metal ring 601 connected to the push rod 602 to rotate, and causes the bottom metal block 501 installed on the inner side to rotate, which drives the threaded rod 50 connected to the bottom metal block 501 to rotate.

[0038] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A seat chassis with a locking function, characterized in that, include: Seat cushion (10); bottom seat (20) mounted by screws at the center of the bottom of the seat cushion (10); expansion self-locking structure (30) that is snapped and fixed inside the bottom seat (20) and extends to the outside of the bottom seat (20); support metal rod (40) passing through the expansion self-locking structure (30). The inner bottom of the expansion self-locking structure (30) is threaded with a threaded rod (50) extending to the outside. A bottom metal block (501) is installed at the bottom of the threaded rod (50). A supporting metal rod (40) is provided through the inside of the threaded rod (50) and the bottom metal block (501). A movable structure (60) is installed on the outside of the bottom metal block (501).

2. A seat chassis with locking function according to claim 1, characterized in that: The expansion self-locking structure (30) includes: an outer shell (301) that is locked and fixed inside the bottom seat (20); an inner shell (302) that is installed and fixed inside the outer shell (301) and extends to the bottom of the outer shell (301); a blocking protrusion (303) installed inside the inner shell (302); and an expansion body (304) disposed inside the inner shell (302) and located inside the blocking protrusion (303). The expansion body (304) has a supporting metal rod (40) that runs through its interior.

3. A seat chassis with locking function according to claim 2, characterized in that: The outer wall of the expansion body (304) is provided with a plurality of inclined portions (3041), and a conical protrusion (3042) is provided at the center of the bottom of the inclined portion (3041), and a supporting metal rod (40) is provided through the interior of the conical protrusion (3042).

4. A seat chassis with locking function according to claim 2, characterized in that: An elastic reinforcing rib (3043) is fitted at the bottom of the outer center of the expansion body (304), and the elastic reinforcing rib (3043) is located below the blocking protrusion (303).

5. A seat chassis with locking function according to claim 3, characterized in that: The threaded rod (50) is threaded to the inner bottom of the inner housing (302). The threaded rod (50) is movably disposed below the expansion body (304). A conical groove (500) is provided at the center of the top of the threaded rod (50). The conical groove (500) matches the structure of the conical protrusion (3042). A first inclined surface (5001) is provided at the contact portion of the conical groove (500) and the conical protrusion (3042).

6. A seat chassis with locking function according to claim 1, characterized in that: The movable structure (60) includes: an embedded metal ring (601) sleeved and fixed on the outside of the bottom metal block (501); a push rod (602) installed on one side of the embedded metal ring (601), and a rubber sleeve (603) provided on the outside of the bottom of the push rod (602).

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