Seat pan and seat for preventing reverse installation

Abstract

The utility model discloses a seat chassis and seat of preventing reverse installation, including base and be connected on base and be used for and the seat connecting piece of being connected with seat, and the seat connecting piece is equipped with a plurality of mounting holes through, and the center point of all mounting holes is connected in proper order and constitutes a polygon, the polygon is asymmetric structure in the front -back direction and / or left and right direction, or, the polygon is symmetric structure in the front -back direction and left and right direction, and the polygon has at least one porous edge, and the mounting hole number on the porous edge is greater than the mounting hole number on the opposite side of the porous edge, the utility model improves the hole position layout of mounting hole on seat connecting piece or the number of mounting hole, makes seat connecting piece have the function of preventing reverse installation, installs the seat on this seat chassis, can avoid seat connecting piece and the seat installation and appear to install reverse phenomenon, improves the use experience of seat.

Description

Technical Field

[0001] This utility model relates to the field of seats, and in particular to a seat chassis and seat that prevents reverse installation. Background Technology

[0002] The seat chassis is an important component mounted on an office chair. The height adjustment of the seat and the tilt angle adjustment of the backrest are both accomplished by the chassis. Currently, the common seat chassis consists of a base, a seat connector, and a back connector. The back connector is located at the rear end of the base and can rotate relative to the base. The back connector is used to connect to the backrest, and the seat connector is used to fix it to the seat. However, there are problems with the assembly of the existing seat chassis and the seat.

[0003] like Figure 8-9 As shown, the seat connector on the existing seat chassis usually has four through mounting holes, and the bottom of the seat also has screw holes that correspond one-to-one with the mounting holes. The center point of the four mounting holes forms a rectangle. When assembling the seat and the seat connector, the mounting holes on the seat connector and the screw holes on the seat can be aligned regardless of whether the front and back orientation of the seat is correct. Therefore, many users easily install the seat backwards during assembly, which means that after assembling the seat and the seat connector, the seat must be removed and reinstalled. Summary of the Invention

[0004] This utility model provides a seat chassis and seat that prevent reverse installation. By improving the hole layout or the number of mounting holes on the seat connector, the seat connector has the function of preventing reverse installation, avoiding the phenomenon of reverse installation when the seat connector and the seat are installed, and improving the user experience of the seat.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A seat chassis for preventing reverse installation includes a base and a seat connector connected to the base for connection with a seat. The seat connector has multiple through holes, and the center points of all the mounting holes are connected sequentially to form a polygon. The polygon is asymmetrical in the front-back direction and / or left-right direction; or, the polygon is symmetrical in both the front-back direction and left-right direction, and the polygon has at least one perforated side, and the number of mounting holes on the perforated side is greater than the number of mounting holes on the opposite side of the perforated side.

[0007] Preferably, the number of mounting holes is four, and the line connecting the center points of the four mounting holes forms a quadrilateral with an asymmetrical structure in the front-back direction and / or left-right direction.

[0008] Preferably, the quadrilateral is an isosceles trapezoid that is symmetrical in the left-right direction but asymmetrical in the front-back direction; or, the quadrilateral is an isosceles trapezoid that is symmetrical in the front-back direction but asymmetrical in the left-right direction.

[0009] Preferably, the quadrilateral is a trapezoid that is asymmetrical in both the front-back direction and the left-right direction.

[0010] Preferably, the number of mounting holes is four, and the center points of the four mounting holes are connected to form a rectangle; the rectangle has a multi-hole side, the number of mounting holes on the multi-hole side is three, and the number of mounting holes on the opposite side of the multi-hole side is two.

[0011] Preferably, all of the mounting holes are circular holes, and the center point is the center of the circular hole; this facilitates installation and positioning.

[0012] Preferably, all of the mounting holes are strip-shaped holes, and the center point is the intersection of the center line in the length direction and the center line in the width direction of the strip-shaped hole, so as to provide a larger installation tolerance space.

[0013] Preferably, the plurality of mounting holes include round holes and strip holes, wherein the center point of the round hole is the center of the round hole, and the center point of the strip hole is the intersection of the center line in the length direction and the center line in the width direction of the strip hole.

[0014] Preferably, the strip hole extends in a straight line or an arc.

[0015] A seat includes a seat and a seat chassis. The bottom end of the seat is provided with screw holes that correspond one-to-one with the positions of a plurality of mounting holes. The corresponding screws pass through the mounting holes and are screwed into the screw holes to fix the seat to the seat chassis.

[0016] The beneficial effects of this utility model, which adopts the above technical solution, are as follows:

[0017] This invention improves the layout or number of mounting holes on the seat connector in the seat chassis, giving the seat connector an anti-reverse installation function. When the polygon formed by connecting the centers of all the mounting holes is not completely symmetrical, the asymmetry of the polygon means that the seat must be installed in a predetermined direction to be correctly installed onto the seat connector. When the polygon formed by connecting the centers of all the mounting holes is completely symmetrical, the multi-hole design also requires the mounting holes to be positioned before installing the seat, which also prevents reverse installation and improves the user experience of the seat. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the seat chassis;

[0019] Figure 2 A schematic diagram showing a trapezoid formed by connecting the centers of each mounting hole, which is symmetrical only in the front-to-back direction;

[0020] Figure 3 This is a structural diagram of another type of seat chassis;

[0021] Figure 4 A schematic diagram showing a trapezoid formed by connecting the centers of each mounting hole, which is symmetrical only in the left and right directions;

[0022] Figure 5 A schematic diagram showing a trapezoid formed by connecting the centers of each mounting hole, which is asymmetrical in both the front-back and left-right directions;

[0023] Figure 6 An enlarged view of the center point when the mounting hole is an arc-shaped strip hole;

[0024] Figure 7 This is a schematic diagram showing that in Example 2, the number of mounting holes on the multi-hole side is greater than the number of mounting holes on its opposite side;

[0025] Figure 8 This is a schematic diagram of a chair seat mounted upside down onto a seat connector in the background art;

[0026] Figure 9 This is a schematic diagram illustrating the correct installation of a chair seat onto a seat connector in the background art.

[0027] The attached figures are labeled as follows: 1-base, 2-connector, 21-mounting hole, 22-multi-hole edge, 211-first center line, 212-second center line. Detailed Implementation

[0028] 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.

[0029] 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.

[0030] This utility model has multiple embodiments, and the specific implementation methods are as follows:

[0031] Example 1: As Figure 1-6As shown, this embodiment provides a seat chassis to prevent reverse installation, including a base 1 and a seat connector 2 connected to the base 1 and used for connecting to the seat. The seat connector 2 can be a single integral component or two symmetrical separate components, for example... Figure 1 The seat connector 2 in the middle includes two separate components. Figure 3 The seat connector 2 is a single, integral component. The seat connector 2 is typically fixed to the chair seat with screws. The seat connector 2 has multiple through mounting holes 21 for screws to pass through. The center points of all mounting holes 21 are connected sequentially to form a polygon. The polygon is a closed structure and is asymmetrical in the front-back and / or left-right directions. This is to prevent the chair seat and seat connector 2 from being assembled backwards due to the symmetrical layout of the holes.

[0032] Furthermore, a seat is provided, including a seat base and a seat chassis. The bottom end of the seat base is provided with screw holes that correspond one-to-one with the positions of a plurality of mounting holes 21. The corresponding screws pass through the mounting holes 21 and are screwed into the screw holes to fix the seat base to the seat chassis. Due to the asymmetrical hole layout, the seat base can be correctly installed onto the seat connector 2.

[0033] Furthermore, the number of mounting holes 21 needs to be kept within a reasonable range. Too many mounting holes 21 will affect the structural strength of the seat connector 2, while too few mounting holes 21 will affect the connection strength and stability of the seat and seat connector 2 after assembly. Therefore, in this embodiment, there are four mounting holes 21, and the line connecting the center points of the four mounting holes 21 forms a quadrilateral with an asymmetrical structure in the front-back direction and / or left-right direction; specifically, as Figure 2 , Figure 4 As shown, the quadrilateral in this embodiment can be an isosceles trapezoid that is symmetrical in the left-right direction but asymmetrical in the front-back direction; or, the quadrilateral can also be an isosceles trapezoid that is symmetrical in the front-back direction but asymmetrical in the left-right direction; for example... Figure 5 As shown, the quadrilateral can also be a trapezoid that is asymmetrical in the front-back direction and also asymmetrical in the left-right direction.

[0034] Furthermore, the shape of the mounting holes 21 can be varied. For example, in this embodiment, all mounting holes 21 can be round holes, which facilitates installation and positioning with screw holes. The center point is the center of the round hole. All the centers are connected sequentially to form the quadrilateral. Alternatively, all mounting holes 21 can be strip-shaped holes, which extend along a straight or arc-shaped trajectory. Strip-shaped holes provide a larger installation space and greater tolerance for installation errors, allowing for normal installation with the chair seat even with minor dimensional deviations. The center point of the strip-shaped hole is determined by the intersection of two center lines. That is, the center line in the length direction of the strip-shaped hole is the first center line 211, and the center line in the width direction of the strip-shaped hole is the second center line 212. The intersection of the first center line 211 and the second center line 212 is the center point of the strip-shaped hole.

[0035] Furthermore, the mounting holes 21 on the seat connector 2 can be partially circular holes and partially strip-shaped holes. The center point of the circular hole is the center of the circle, and the center point of the strip-shaped hole is the intersection of the center line in the length direction and the center line in the width direction of the strip-shaped hole; for example... Figure 1 As shown, the two mounting holes 21 near the front end of the seat connector 2 are round holes, and the two mounting holes 21 near the rear end of the seat connector 2 are strip holes. During installation, the two round holes can be used to position the screw holes. After positioning, screws are then tightened into the screw holes corresponding to the positions of the strip holes to complete the installation of the chair seat.

[0036] Example 2: As Figure 7 As shown, this embodiment provides another structure to prevent reverse installation, which is explained under the premise of symmetrical hole layout; when the polygon formed by the center points of all mounting holes 21 is symmetrical in the front-back direction and the left-right direction, the polygon has at least one multi-hole side 22, and the number of mounting holes 21 on the multi-hole side 22 is greater than the number of mounting holes 21 on the opposite side of the multi-hole side 22; that is, under the premise that the polygon is a completely symmetrical structure, by setting different numbers of mounting holes 21 on at least two opposite sides, the chair seat is prevented from being installed backwards due to the same number of mounting holes 21 on each side of the polygon, achieving the same anti-reverse installation effect as in the above embodiment.

[0037] Furthermore, in this embodiment, there are four mounting holes 21, and the center points of the four mounting holes 21 are connected to form a rectangle. Similarly, in order to balance the structural strength of the seat connector 2 and the stability of the seat after connection, the rectangle has a perforated side 22, with three mounting holes 21 on the perforated side 22 and two mounting holes 21 on the opposite side of the perforated side 22.

[0038] 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 seat chassis designed to prevent reverse installation, characterized in that, Includes a base (1) and a seat connector (2) connected to the base (1) and used to connect to the chair seat. The seat connector (2) has multiple mounting holes (21) through it. The center points of all the mounting holes (21) are connected in sequence to form a polygon. The polygon is asymmetrical in the front-back direction and / or left-right direction. Alternatively, the polygon is symmetrical in both the front-back direction and left-right direction, and the polygon has at least one multi-hole side (22). The number of mounting holes (21) on the multi-hole side (22) is greater than the number of mounting holes (21) on the opposite side of the multi-hole side (22).

2. The seat chassis for preventing reverse installation according to claim 1, characterized in that: The number of mounting holes (21) is four, and the line connecting the center points of the four mounting holes (21) forms a quadrilateral with an asymmetrical structure in the front-back direction and / or left-right direction.

3. A seat chassis for preventing reverse installation according to claim 2, characterized in that: The quadrilateral is an isosceles trapezoid that is symmetrical in the left-right direction but asymmetrical in the front-back direction; or, the quadrilateral is an isosceles trapezoid that is symmetrical in the front-back direction but asymmetrical in the left-right direction.

4. A seat chassis for preventing reverse installation according to claim 2, characterized in that: The quadrilateral is a trapezoid that is asymmetrical in both the front-back direction and the left-right direction.

5. A seat chassis for preventing reverse installation according to claim 1, characterized in that: The number of mounting holes (21) is four, and the center points of the four mounting holes (21) are connected to form a rectangle; the rectangle has a multi-hole side (22), the number of mounting holes (21) on the multi-hole side (22) is three, and the number of mounting holes (21) on the opposite side of the multi-hole side (22) is two.

6. A seat chassis for preventing reverse installation according to claim 1, characterized in that: All of the mounting holes (21) are circular holes, and the center point is the center of the circular hole.

7. A seat chassis for preventing reverse installation according to claim 1, characterized in that: The plurality of mounting holes (21) are all strip holes, and the center point is the intersection of the center line in the length direction and the center line in the width direction of the strip hole.

8. A seat chassis for preventing reverse installation according to claim 1, characterized in that: The plurality of mounting holes (21) include round holes and strip holes. The center point of the round hole is the center of the round hole, and the center point of the strip hole is the intersection of the center line in the length direction and the center line in the width direction of the strip hole.

9. A seat chassis for preventing reverse installation according to claim 7 or 8, characterized in that: The strip-shaped hole extends in a straight line or an arc.

10. A type of seat, characterized in that, Includes a seat and a seat chassis as described in claim 1. The bottom end of the seat is provided with screw holes corresponding to the positions of a plurality of mounting holes (21). The corresponding screws pass through the mounting holes (21) and are screwed into the screw holes to fix the seat to the seat chassis.

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