Seat front-back adjusting device

Abstract

The utility model belongs to the technical field of seats, and particularly relates to a seat front-back adjusting device which comprises a sliding rail assembly, the sliding rail assembly comprises a sliding rail, an inverted-T-shaped groove is formed in the sliding rail, one or more sliding assemblies capable of sliding along the inverted-T-shaped groove are arranged on the inverted-T-shaped groove, and a row of vertical positioning holes or positioning grooves are formed in the sliding rail at intervals in the length direction. The upper portion of the sliding assembly is fixedly connected with the chair leg fixing plate, a locking assembly is fixed to the chair leg fixing plate, an indexing pin capable of being inserted into the positioning hole or the positioning groove is arranged on the locking assembly, and the indexing pin is inserted into or pulled out of the positioning hole or the positioning groove through an unlocking assembly to achieve locking or unlocking of the chair leg fixing plate and the sliding rail. Production cost is low, performance is stable, adjustment is convenient, and application and popularization are facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of seats, and in particular relates to a seat front and rear adjustment device. Background Art

[0002] Space on airplanes or high-speed trains is very precious. The front-to-back distance of seats installed thereon is mostly relatively fixed. However, the legroom required by different drivers or passengers is different. In addition, airplanes in flight or high-speed trains in travel are constantly bumping and vibrating due to environmental changes such as airflow, pressure, road surface and tracks. Airplane seats, high-speed train seats or vehicle seats are not allowed to shake due to loose fixation. This brings difficulties and troubles to some special situations where the front-to-back distance of seats needs to be adjusted. Currently, airplane or high-speed train seats are basically fixed or professionals use special tools to manually adjust a single locking block to achieve the front-to-back adjustment function of the seat. This cannot meet the needs of users to adjust the seats themselves. It is an adjustment and fixing method that urgently needs to be solved for airplane or high-speed train seats. Summary of the Invention

[0003] The object of the present invention is to provide a seat front and rear adjustment device which has a simple structure, low production cost, convenient operation and easy adjustment.

[0004] The object of the present invention is to solve like this:

[0005] A device for adjusting a seat forward and backward includes a slide rail assembly, the slide rail assembly includes a slide rail, an inverted T-slot is provided on the slide rail, and one or more sliding assemblies that can slide along the inverted T-slot are provided on the inverted T-slot, a row of vertical positioning holes are provided on the slide rail at intervals along the length direction, the upper part of the sliding assembly is fixedly connected to the chair leg fixing plate, and a locking assembly is fixed on the chair leg fixing plate, and the locking assembly is provided with an indexing pin that can be inserted into the positioning hole or positioning slot, and the indexing pin is inserted into or pulled out of the positioning hole or positioning slot through an unlocking assembly to achieve locking or unlocking of the chair leg fixing plate and the slide rail; the full name of the indexing pin is a reset-type knob plunger indexing pin, abbreviated as indexing pin, which has an internal spring and can achieve automatic reset. The present invention utilizes this feature to achieve miniaturization of the reset mechanism.

[0006] As a further optimization of the above technical solution, the sliding assembly includes an inverted T-shaped slider that is clamped on the inverted T-shaped groove and can slide along the inverted T-shaped groove. A trapezoidal slide rail arranged along the length direction is centrally arranged on the bottom of the inverted T-shaped groove. An upward rectangular groove is provided at the bottom of the inverted T-shaped slider. A roller with a trapezoidal groove is fixed in the rectangular groove by bolts and can rotate and move along the trapezoidal slide rail and can slide in matching with the trapezoidal slide rail.

[0007] As a further optimization of the above technical solution, the upper portion of the inverted T-shaped slider is fixed to the chair leg fixing plate by two or more bolts.

[0008] As a further optimization of the above technical solution, the trapezoidal slide rail is an integrally formed trapezoidal body on the upper surface of the rectangular body, the lower base width of the trapezoidal body is smaller than the upper surface width of the rectangular body, and the roller slides in cooperation with the trapezoidal body.

[0009] As a further optimization of the above technical solution, the locking assembly includes a locking mounting plate, the upper part of the locking mounting plate is fixed to the lower part of the chair leg fixing plate by two or more bolts, and a vertical indexing pin hole is provided on the connecting ear on one side of the lower part of the locking mounting plate. The indexing pin passes through the indexing pin hole and is inserted into the positioning hole or positioning groove to realize locking of the chair leg fixing plate and the slide rail.

[0010] As a further optimization of the above technical solution, blocks are fixed in the inverted T-shaped grooves at both ends of the slide rail by bolts.

[0011] As a further optimization of the above technical solution, the stopper is made of rubber material.

[0012] As a further optimization of the above technical solution, the unlocking assembly includes a pull wire terminal and an unlocking wrench hinged on the mounting frame, one end of the pull wire terminal is connected to the unlocking wrench, and the other end is connected to the top of the indexing pin. The unlocking wrench is moved to drive the indexing pin out of the positioning hole or positioning groove to unlock through the pull wire terminal. When the unlocking wrench is released, the indexing pin is reset by the spring inside the indexing pin.

[0013] As a further optimization of the above technical solution, there are two slide rails, and each slide rail is connected to the chair leg fixing plate through two sliding components and a locking component.

[0014] As a further optimization of the above technical solution, one end of the pull wire terminal is connected to the unlocking wrench and the other end is connected to a splitter. The output end of the splitter outputs two pull wire terminals, and the two pull wire terminals are respectively connected to each indexing pin on each chair leg fixing plate on each slide rail.

[0015] The advantages of the present invention over the prior art are:

[0016] 1. The present invention arranges rollers on the trapezoidal slide rails to drive the movement of the seat, which has low rolling friction, simple and practical structure, and convenient and labor-saving adjustment.

[0017] 2. The present invention adopts a method of separating the rolling end from the locking end, which solves the problem of complex structure and difficult installation of the seat sliding mechanism, greatly simplifies the mechanism, reduces the number of parts, and makes installation more convenient.

[0018] 3. The new slide rails used in this invention utilize the same first-stage process (same cross-section) as those currently used on large aircraft. This allows for easy installation on conventional large aircraft rails without modification. Furthermore, the newly designed features enhance the performance of this rolling mechanism, ensuring strong compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0020] Figure 2 It is a cross-sectional view of the sliding assembly of the present invention.

[0021] Figure 3 It is an exploded view of the sliding assembly of the present invention.

[0022] Figure 4 It is one of the three-dimensional schematic diagrams of the locking assembly of the present invention.

[0023] Figure 5 This is the second three-dimensional schematic diagram of the locking assembly of the present invention.

[0024] Figure 6 is a cross-sectional view of the locking assembly of the present invention.

[0025] Figure 7 It is a partial three-dimensional schematic diagram of the structure near the trapezoidal slide rail of the present invention.

[0026] Figure 8 It is a three-dimensional schematic diagram of the unlocking component of the present invention. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to specific embodiments of the present invention. Figures 1-8 :

[0028] A seat front and rear adjustment device includes a slide rail assembly 10, the slide rail assembly 10 includes a slide rail 11, the slide rail 11 is provided with an inverted T-slot 14, the inverted T-slot 14 is provided with one or more sliding assemblies 20 that can slide along the inverted T-slot 14, the slide rail 11 is provided with a row of vertical positioning holes or positioning grooves 13 spaced apart along the length direction, the upper part of the sliding assembly 20 is fixedly connected to the chair leg fixing plate 50, the chair leg fixing plate 50 is fixed with a locking assembly 40, the locking assembly 40 is provided with an indexing pin 46 that can be inserted into the positioning hole or positioning groove 13, the indexing pin 46 is inserted into or pulled out of the positioning hole 13 through the unlocking assembly 30 to achieve locking or unlocking of the chair leg fixing plate 50 and the slide rail 11.

[0029] As a further optimization of the above technical solution, the sliding assembly 20 includes an inverted T-shaped slider 22 that is clamped on the inverted T-shaped groove 14 and can slide along the inverted T-shaped groove 14. A trapezoidal slide rail 15 arranged along the length direction is centrally arranged on the bottom of the inverted T-shaped groove 14. An upward rectangular groove 23 is provided at the bottom of the inverted T-shaped slider 22. A roller 25 with a trapezoidal groove 26 that can rotate and move along the trapezoidal slide rail 15 and can slide in matching fashion with the trapezoidal slide rail 15 is fixed in the rectangular groove 23 by bolts 24. It can be seen that the inverted T-shaped groove 14 limits the inverted T-shaped slider 22 to only slide back and forth in the inverted T-shaped groove 14, and cannot move up and down. That is, the sliding assembly 20 allows the seat to slide horizontally with the inverted T-shaped slider 22, and limits the vertical movement of the seat with the inverted T-shaped slider 22.

[0030] As a further optimization of the above technical solution, the upper portion of the inverted T-shaped sliding block 22 is fixed to the chair leg fixing plate 50 by two or more bolts 21 .

[0031] As a further optimization of the above technical solution, the trapezoidal slide rail 15 is integrally formed with a trapezoidal body 19 on the upper surface of the rectangular body 18, the lower base width of the trapezoidal body 19 is smaller than the upper surface width of the rectangular body 18, and the roller 25 slides in cooperation with the trapezoidal body 19.

[0032] As a further optimization of the above technical solution, the locking assembly 40 includes a locking mounting plate 43, the upper part of the locking mounting plate 43 is fixed to the lower part of the chair leg fixing plate 50 by two or more bolts 42, and a vertical indexing pin hole 47 is provided on the ear 45 on one side of the lower part of the locking mounting plate 43. The indexing pin 46 passes through the indexing pin hole 47 and is inserted into the positioning hole 13 to realize the locking of the chair leg fixing plate 50 and the slide rail 11.

[0033] As a further optimization of the above technical solution, stoppers 12 are fixed in the inverted T-shaped slots 14 at both ends of the slide rail 11 by bolts 17 .

[0034] As a further optimization of the above technical solution, the stopper 12 is made of rubber material, which is used to reduce impact, absorb impact energy and noise, and also serves as a limit block for adjusting the position of the chair legs.

[0035] As a further optimization of the above technical solution, the unlocking assembly 30 includes a pull wire terminal 33 and an unlocking wrench 31 hinged on the mounting plate 35, one end of the pull wire terminal 33 is connected to the unlocking wrench 31, and the other end is connected to the top of the indexing pin 46. The unlocking wrench 31 is moved to drive the indexing pin 46 out of the positioning hole or positioning groove 13 to unlock through the pull wire terminal 33, and the unlocking wrench is released to reset the indexing pin 46 through the spring 44 inside the indexing pin 46.

[0036] As a further optimization of the above technical solution, there are two slide rails 11 , and each slide rail 11 is connected to the chair leg fixing plate 50 via two sliding components 20 and a locking component 40 .

[0037] As a further optimization of the above technical solution, one end of the pull wire terminal 33 is connected to the unlocking wrench 31 and the other end is connected to the splitter 34. The output end of the splitter 34 outputs two of the pull wire terminals 33. The two pull wire terminals 33 are respectively connected to each of the indexing pins 46 on each of the chair leg fixing plates 50 on each of the slide rails 11. The splitter 34 is a pull wire terminal that drives the two pull wire terminals to move synchronously at the same time.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still make simple replacements or modifications of similar technologies to the technical solutions or technical features described in the aforementioned embodiments, and these simple replacements or modifications do not deviate the essence of the corresponding technical solutions from the spirit and essence of the technical solutions of the various embodiments of the present invention, and they are still within the scope of protection of the present invention.

Claims

1. A seat front and rear adjustment device, comprising a slide rail assembly, characterized in that: The slide rail assembly includes a slide rail, an inverted T-shaped slot is provided on the slide rail, and one or more sliding assemblies that can slide along the inverted T-shaped slot are provided on the inverted T-shaped slot. A row of vertical positioning holes are provided on the slide rail at intervals along the length direction. The upper part of the sliding assembly is fixedly connected to the chair leg fixing plate, and a locking assembly is fixed on the chair leg fixing plate. The locking assembly is provided with an indexing pin that can be inserted into the positioning hole or positioning slot. The indexing pin is inserted into or pulled out of the positioning hole or positioning slot through an unlocking assembly to achieve locking or unlocking of the chair leg fixing plate and the slide rail.

2. A seat front and rear adjustment device according to claim 1, characterized in that: The sliding assembly includes an inverted T-shaped slider that is clamped on the inverted T-shaped groove and can slide along the inverted T-shaped groove. A trapezoidal slide rail arranged along the length direction is centrally arranged on the bottom of the inverted T-shaped groove. An upward rectangular groove is provided at the bottom of the inverted T-shaped slider. A roller with a trapezoidal groove is fixed in the rectangular groove by bolts and can rotate and move along the trapezoidal slide rail and can slide in matching with the trapezoidal slide rail.

3. The seat front and rear adjustment device according to claim 2, characterized in that: The upper portion of the inverted T-shaped sliding block is fixed to the chair leg fixing plate by two or more bolts.

4. The seat front and rear adjustment device according to claim 2, characterized in that: The trapezoidal slide rail is formed with a trapezoidal body integrally on the upper surface of a rectangular body. The lower base width of the trapezoidal body is smaller than the upper surface width of the rectangular body. The roller slides in cooperation with the trapezoidal body.

5. The seat front and rear adjustment device according to claim 1, characterized in that: The locking assembly includes a locking mounting plate, the upper portion of which is fixed to the lower portion of the chair leg fixing plate by two or more bolts, a vertical indexing pin hole is provided on the connecting ear on one side of the lower portion of the locking mounting plate, the indexing pin passes through the indexing pin hole and is inserted into the positioning hole or positioning groove to achieve locking of the chair leg fixing plate and the slide rail.

6. The seat fore-aft adjustment device according to claim 1, characterized in that: Stoppers are fixed in the inverted T-shaped slots at both ends of the slide rail by bolts.

7. The seat fore-aft adjustment device according to claim 1, characterized in that: The stopper is made of rubber material.

8. A seat fore-aft adjustment device according to any one of claims 1 to 7, characterized in that: The unlocking assembly includes a pull wire terminal and an unlocking wrench hinged on the mounting frame, one end of the pull wire terminal is connected to the unlocking wrench, and the other end is connected to the top of the indexing pin. When the unlocking wrench is pulled, the indexing pin is disengaged from the positioning hole or positioning groove through the pull wire terminal to unlock. When the unlocking wrench is released, the indexing pin is reset through the spring inside the indexing pin.

9. The seat fore-aft adjustment device according to claim 8, characterized in that: There are two slide rails, and each slide rail is connected to the chair leg fixing plate via two sliding components and a locking component.

10. The seat fore-aft adjustment device according to claim 9, characterized in that: One end of the pull wire terminal is connected to the unlocking wrench and the other end is connected to the splitter. The output end of the splitter outputs two pull wire terminals, and the two pull wire terminals are respectively connected to each indexing pin on each chair leg fixing plate on each slide rail.

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