Novel unlocking mechanism with seat front-back adjusting function

Abstract

The utility model belongs to the technical field of seats, and relates to a novel unlocking mechanism with a seat front-back adjusting function, a sliding rail is provided with locking block assemblies capable of fixing seat legs, a T-shaped groove is axially formed in the sliding rail, opposite arc-shaped grooves are axially formed in the two side walls of the T-shaped groove at intervals, and the locking block assemblies comprise the first locking block assembly and the second locking block assembly; a T-shaped spring bolt is arranged on the lower portion of the second locking block assembly and is downwards clamped into the T-shaped groove of the sliding rail, rotating spring bolts on the two sides in the first locking block assembly are arranged in the T-shaped groove in a sliding mode, and a sliding locking head in the middle can be clamped into the arc-shaped groove or slide out of the arc-shaped groove; a T-shaped spring bolt in the front locking block assembly and a sliding locking head in the rear locking block assembly can be driven at the same time through the unlocking handle assembly, and locking or unlocking between the seat and the sliding rail is achieved. The device has the advantages of being convenient to adjust and operate, light in weight, firm in fixation, capable of meeting the requirements of driving or sitting spaces of different human body sizes and suitable for adjusting the front-back distance of an aircraft seat or a high-speed rail seat.

Description

Technical Field

[0001] The present invention belongs to the technical field of seats, and particularly relates to a novel unlocking mechanism with a seat front-back adjustment function. Background Art

[0002] As is well known, the space on airplanes or high-speed rail trains is very precious, and the front-back distances of the seats installed thereon are mostly relatively fixed. However, the leg spaces required by different drivers or passengers are different. In addition, during the flight of the airplane or the running of the high-speed rail, due to frequent bumps and vibrations caused by environmental changes such as air currents, pressure, road tracks, etc., it is not allowed for the airplane or high-speed rail seats to shake due to loose fixation with the airplane or high-speed rail. This brings difficulties and troubles to adjusting the front-back distance of the seats in some special cases. Currently, the airplane or high-speed rail seats are basically fixed or the front-back adjustment function of the seats is realized by professional personnel manually adjusting a single locking block with special tools, which cannot meet the needs of users to adjust the seats by themselves. It is an adjustment and fixation method that urgently needs to be solved for airplane or high-speed rail seats. Summary of the Invention

[0003] The purpose of the present invention is to provide a front-back adjustment device for airplane or high-speed rail train seats that is firmly fixed and convenient for adjusting the front-back distance of the seats.

[0004] The purpose of the present invention is solved as follows:

[0005] A novel unlocking mechanism with a seat front-back adjustment function, a locking block assembly for fixing the seat legs is slidably arranged on a slide rail. A T-shaped groove is axially arranged on the slide rail, and opposite arc-shaped grooves are axially and spacedly arranged on both side walls of the T-shaped groove. The locking block assembly includes a first locking block assembly. The rotating locking tongues on both sides of the first locking block assembly are slidably arranged in the transverse groove, and the sliding locking head in the middle can be inserted into or slide out of the arc-shaped groove. When the sliding locking head leaves the arc-shaped groove, the first locking block assembly can move along the slide rail to adjust the front-back position of the seat. When the sliding locking head is inserted into the arc-shaped groove, the first locking block assembly is positioned on the slide rail to limit the front-back movement of the seat.

[0006] As a further optimization of the above technical solution, the first locking block assembly includes a housing with an installation cavity. The rotating locking tongue that extends downward out of the installation cavity and is slidably arranged in the transverse groove is hinged in the installation cavity. One end of a control rod is connected to the sliding locking head, and the other end extends upward out of the housing and is provided with a pull rope connection hole. One end of a spring sleeved on the control rod abuts against the top inner wall of the housing, and the other end abuts against the sliding locking head. The sliding locking head is clamped in the arc-shaped groove, and the sliding locking head is unlocked and separated from the arc-shaped groove as the control rod rises.

[0007] As a further optimization of the above technical solution, a drawstring joint is connected to the drawstring connection hole.

[0008] As a further optimization of the above technical solution, the installation cavity is a vertically arranged through hole axially provided on the housing. The upper part of the through hole has a diameter-expanded step. A convex edge is provided on the upper part of the control rod, and the convex edge is clamped on the step to limit the downward movement of the control rod.

[0009] As a further optimization of the above technical solution, the rotary locking tongues are respectively arranged on both sides of the control rod. The lower part of the rotary locking tongue is provided with an end slidably arranged on the transverse groove. The upper part of the rotary locking tongue is hinged in the installation cavity of the housing through a horizontally arranged hinge hole and a pin.

[0010] As a further optimization of the above technical solution, limiting planes are correspondingly arranged on both the installation cavity and the control rod to limit the rotation of the control rod.

[0011] As a further optimization of the above technical solution, the locking block assembly further includes a second locking block assembly.

[0012] As a further optimization of the above technical solution, the second locking block assembly includes a slide rail locking piece slidably arranged on the T-shaped groove. One end of a pin is hinged to the slide rail locking piece, and the other end is connected to a rotary adjustment head extending outside the housing. Limiting planes are correspondingly arranged on both the inner wall of the installation cavity of the housing and the pin to limit the rotation of the pin. A spring is sleeved on the pin. One end of the spring abuts against the annular convex edge on the upper part of the pin, and the lower end abuts against the inner wall of the installation cavity. Rotating the rotary adjustment head can drive the slide rail locking piece to move downward to release the locking with the slide rail and move upward to lock with the slide rail. Two or more seat leg mounting holes are provided on the housing.

[0013] As a further optimization of the above technical solution, a drawstring joint is installed in the upper mounting hole of the rotary adjustment head.

[0014] As a further optimization of the above technical solution, two slide rails are arranged in parallel. The first locking block assembly and the second locking block assembly are both slidably arranged on each slide rail. The drawstring joints on all the first locking block assemblies and the second locking block assemblies are connected to the main drawstring on the unlocking handle through sub-drawstrings. Operating the unlocking handle can lock or unlock all the first locking block assemblies and the second locking block assemblies simultaneously.

[0015] The prominent advantages of the present invention compared with the prior art are:

[0016] 1. Based on the situation that many existing airplane or high - speed rail seats cannot be adjusted conveniently back and forth, the present invention invented a new mechanism that enables the occupant to adjust the seat back and forth by pulling only one handle, which is simple, fast. After the adjustment stroke is completed, releasing the handle can quickly lock the movement of the seat, being firm and reliable.

[0017] 2. The present invention solves the problem that the airplane seat can only be fixed at one position and cannot be adjusted conveniently, and provides a relatively long stroke in the X - direction, enabling the occupant to conveniently adjust to the target position.

[0018] 3. The layout of the present invention takes into account ergonomics, with convenient handle operation, and the adjustment function adapts to the operation requirements of different body sizes.

[0019] 4. The slide rail adopted by the present invention is a standard slide rail used in aviation. For any airplane equipped with this slide rail, the mechanism in the present invention can be used to make the seat have the function of adjusting back and forth.

[0020] 5. Compared with the adjustment mechanism of the automobile seat slide rail, the present invention has a simple structure, a simple and convenient installation and disassembly process, and a low cost.

[0021] 6. The present invention is also applicable to the front - back adjustment of high - speed rail seats. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the installation position of the present invention in cooperation with the seat.

[0023] Figure 2 is a partial top - view of the slide rail of the present invention.

[0024] Figure 3 is a partial three - dimensional schematic diagram of the slide rail of the present invention.

[0025] Figure 4 is a cross - sectional view of the slide rail of the present invention.

[0026] Figure 5 is a three - dimensional schematic diagram of the first locking block assembly of the present invention.

[0027] Figure 6 is a three - dimensional schematic diagram of the first locking block assembly of the present invention with the housing removed.

[0028] Figure 7 is a three - dimensional schematic diagram of the second locking block assembly of the present invention.

[0029] Figure 8 is a three - dimensional schematic diagram of the second locking block assembly of the present invention with the outer shell removed.

[0030] Figure 9It is a schematic diagram of the use state of the first locking block assembly and the second locking block assembly of the present invention on the slide rail.

[0031] Figure 10 It is Figure 9 An enlarged view of part A.

[0032] Figure 11 It is Figure 9 An enlarged view of part B.

[0033] Figure 12 It is Figure 9 An enlarged view of part C. Detailed implementation manners

[0034] The present invention will be further described below with specific embodiments in conjunction with the accompanying drawings. Refer to Figures 1-12 :

[0035] A novel unlocking mechanism with a function of adjusting the seat back and forth. A locking block assembly for fixing the seat legs is slidably arranged on a slide rail 1. A T-shaped groove is axially arranged on the slide rail 1. Opposite arc grooves 14 are axially spaced on both side walls of the T-shaped groove. The locking block assembly includes a first locking block assembly 2. The rotating locking tongues 35 on both sides of the first locking block assembly 2 are slidably arranged in the transverse groove 12, and the sliding locking head 37 in the middle can be engaged in or disengaged from the arc groove 14. When the sliding locking head 37 leaves the arc groove 14, the first locking block assembly 2 can move along the slide rail 1 to adjust the front and back positions of the seat. When the sliding locking head 37 is engaged in the arc groove 14, the first locking block assembly 2 is positioned on the slide rail 1 to limit the front and back movement of the seat.

[0036] As a further optimization of the above technical solution, the first locking block assembly 2 includes a housing 20 with an installation cavity. The rotating locking tongue 35 that extends downward out of the installation cavity and slides in the transverse groove 12 is hinged in the installation cavity. The rotating locking tongue 35 is hinged to the housing 20 in the installation cavity through a hinge shaft 38. The function of the rotating locking tongue 35 is to limit the seat in the up and down direction (Z direction) during locking. One end of a control rod 31 is connected to the sliding locking head 37, and the other end extends upward out of the housing 20 and is provided with a pull rope connection hole 30. One end of a spring 33 sleeved on the control rod 31 abuts against the top inner wall of the housing 20, and the other end abuts against the sliding locking head 37. The sliding locking head 37 is clamped in the arc groove 14. The sliding locking head 37 is disengaged from the arc groove 14 and unlocked as the control rod 31 rises. At the same time, the upper plane of the sliding locking head 37 drives the inclined plane below the hinge circular hole of the rotating locking tongue 35 to rotate and unlock in the up and down direction (Z direction).

[0037] As a further optimization of the above technical solution, a pull rope connector 41 is connected to the pull rope connection hole 30 .

[0038] As a further optimization of the above technical solution, the installation cavity is a vertical through hole axially arranged on the shell 20, the upper part of the through hole is expanded to form a step, and the upper part of the control rod 31 is provided with a convex edge, which is clamped on the step to limit the downward movement of the control rod 31.

[0039] As a further optimization of the above technical solution, the rotating lock tongue 35 is respectively arranged on both sides of the control rod 31, and the lower part of the rotating lock tongue 35 is provided with a terminal end 36, and the upper part of the rotating lock tongue 35 is hinged in the mounting cavity of the shell 20 through a laterally arranged hinge hole and a pin 38; when the sliding locking head 37 moves upward to unlock the seat in the front and rear directions, the terminal end 36 also separates from the lower surface of the slide rail groove at the same time, so that it is unlocked in the Z direction, so that the locking block assembly will not have friction with the lower surface of the slide rail groove when sliding; at the same time, the Y-direction width of the terminal end 36 exceeds the diameter of the arc groove, whether in the locked state or after unlocking, the entire mechanism will not separate from the slide rail to cause danger.

[0040] As a further optimization of the above technical solution, limited position planes are correspondingly arranged on the installation cavity and the control rod 31 to limit the rotation of the control rod 31 .

[0041] As a further optimization of the above technical solution, the locking block assembly further includes a second locking block assembly, and the shell 20 is provided with more than two mounting holes 22 which can be fixedly connected to the seat.

[0042] As a further optimization of the above technical solution, the second locking block assembly 3 includes a slide rail locking piece 56 slidably mounted on the T-slot, one end of the pin 54 is hinged on the slide rail locking piece 56, and the other end is connected to the rotation adjustment head 50 extending out of the housing 60 through a retaining spring pin 51, and the inner wall of the mounting cavity of the housing 60 and the pin are correspondingly provided with a limited position plane to limit the rotation of the pin 54, and a spring 53 is mounted on the pin 54, and one end of the spring 53 is connected to the annular ring on the upper part of the pin 54. The upper and lower ends of the convex edge 52 are connected to the inner wall of the installation cavity. Rotating the rotating adjustment head 50 can drive the slide rail locking piece 56 to move downward to release the lock with the slide rail 1, and move upward to lock with the slide rail 1. The shell 60 is provided with two seat leg mounting holes 61. The retaining spring pin 51 is sleeved with a torsion spring (not marked in the figure). One end of the torsion spring is inserted into the side wall of the rotating adjustment head 50, and the other end is stuck in the corresponding groove in the shell of the second locking block, so that the rotating adjustment head can automatically return to its position when there is no external force. In addition, a cover plate is also provided on the second locking block assembly 3, which has the function of aesthetics and preventing foreign objects from falling into and causing the mechanism to be stuck.

[0043] As a further optimization of the above technical solution, a wire pulling joint 42 is installed in the upper mounting hole of the rotary adjustment head 50.

[0044] As a further optimization of the above technical solution, two slide rails 1 are arranged in parallel. The first locking block assembly 2 and the second locking block assembly 3 are slidably arranged on each slide rail 1. The wire pulling joints 41 and 42 on all the first locking block assemblies 2 and the second locking block assemblies 3 are connected to the main wire 73 on the unlocking handle 71 through branch wires 731, 732, 733, and 734. Operating the unlocking handle 71 can lock or unlock all the first locking block assemblies 2 and the second locking block assemblies 3 simultaneously to lock or move the front and rear positions of the seat.

[0045] The present invention mainly includes a slide rail 1, a first locking block assembly 2, and a second locking block assembly 3. The first locking block assembly 2 and the second locking block assembly 3 slide on the slide rail 1. The leg of the aircraft seat 100 or the high-speed rail is connected to the first locking block assembly 2 and the second locking block assembly 3 by bolts. The rotating handle 71 is fixed to the handle base 70 through a circlip pin 74. The finger drives the rotating handle 71 to rotate clockwise around the circlip pin 74, and the wire terminal in the wire terminal slot 76 drives the wire 73 to move, so as to unlock the above two main structures. In addition, a tension spring 72 is arranged on the rotating handle, so that the handle can return to its position smoothly after rotating clockwise. The rear end of the tension spring is fixed in the hole below the bracket 77. The handle base and the bracket are both fixed to the seat pan structure through the upper mounting holes; when the occupant adjusts the unlocking handle 71, the wire pulling joints on the first locking block assembly 2 and the second locking block assembly 3 on the two slide rails can be controlled through the main wire 73 and the synchronously moving branch wires 731, 732, 733, and 734 (the wire terminals are fixed in the wire terminal slots on the rotating handle 71, and are divided into two wires through a one-in-two wire. The two wires are respectively connected to a transfer plate and then drive two wires, so that one wire can drive four structures to move synchronously), so as to drive the internal mechanism parts of the first locking block assembly 2 and the second locking block assembly 3 to move synchronously, thereby realizing the unlocking of the seat, adjusting the seat from the locked state on the slide rail to the free state, and being able to slide freely on the slide rail. When the occupant releases the unlocking handle 71, the unlocking handle 71 is reset by the return spring, and the internal mechanism parts of the first locking block assembly 2 and the second locking block assembly 3 are reset by their respective springs 33 and 53, locking the first locking block assembly 2 and the second locking block assembly 3 on the slide rail 1, thereby realizing the locking of the seat 100.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still make simple substitutions or modifications of similar technologies to the technical solutions or technical features recorded in the foregoing embodiments, and these simple substitutions or modifications do not make the essence of the corresponding technical solutions deviate from the spirit and essence of the technical solutions of the various embodiments of the present invention, and are still within the protection scope of the present invention.

Claims

1. A novel unlocking mechanism with a function of adjusting the seat back and forth, characterized in that: A locking block assembly capable of fixing the seat legs is slidably arranged on the slide rail. An axial T-shaped groove is arranged on the slide rail. Opposite arc-shaped grooves are axially spaced on both side walls of the T-shaped groove. The locking block assembly includes a first locking block assembly. The rotary locking tongues on both sides of the first locking block assembly are slidably arranged in the transverse groove, and the sliding locking head in the middle can be engaged in or disengaged from the arc-shaped groove. When the sliding locking head leaves the arc-shaped groove, the first locking block assembly can move along the slide rail to adjust the front-back position of the seat. When the sliding locking head is engaged in the arc-shaped groove, the first locking block assembly is positioned on the slide rail to limit the front-back movement of the seat.

2. The novel unlocking mechanism with the function of adjusting the seat back and forth according to claim 1, wherein: The first locking block assembly includes a housing with an installation cavity. The rotary locking tongues that extend downward from the installation cavity and slide in the transverse groove are hinged in the installation cavity. One end of the control rod is connected to the sliding locking head, and the other end extends upward from the housing and is provided with a pull rope connection hole. One end of the spring sleeved on the control rod abuts against the top inner wall of the housing, and the other end abuts against the sliding locking head. The sliding locking head is clamped in the arc-shaped groove and is unlocked when it is disengaged from the arc-shaped groove as the control rod rises.

3. A novel unlocking mechanism with a function of adjusting the seat back and forth according to claim 2, characterized in that: A pull rope joint is connected to the pull rope connection hole.

4. A novel unlocking mechanism with a function of adjusting the seat back and forth according to claim 2, characterized in that: The installation cavity is a vertical through hole axially arranged on the housing. The upper part of the through hole has an enlarged diameter to form a step. A convex edge is arranged on the upper part of the control rod, and the convex edge is clamped on the step to limit the downward movement of the control rod.

5. A novel unlocking mechanism with a front-back seat adjustment function according to claim 2, wherein: The rotary locking tongues are respectively arranged on both sides of the control rod. The lower part of the rotary locking tongue is provided with an end that slides on the transverse groove. The upper part of the rotary locking tongue is hinged in the installation cavity of the housing through a laterally arranged hinge hole and a pin.

6. The novel unlocking mechanism with the function of adjusting the seat back and forth according to claim 2, characterized in that: Limiting planes are correspondingly arranged on both the installation cavity and the control rod to limit the rotation of the control rod.

7. A novel unlocking mechanism with a function of adjusting the seat back and forth according to any one of claims 1-6, characterized in that: The locking block assembly further includes a second locking block assembly.

8. A novel unlocking mechanism with a function of adjusting the seat back and forth according to claim 7, characterized in that: The second locking block assembly includes a slide rail locking piece slid on the T-shaped groove. One end of a pin is hinged to the slide rail locking piece, and the other end contacts a rotary adjustment head. Limiting planes are correspondingly arranged on the inner wall of the installation cavity of the outer shell and the pin to limit the rotation of the pin. A spring is sleeved on the pin. One end of the spring abuts against the annular convex edge on the upper part of the pin, and the lower end abuts against the inner wall of the installation cavity. Rotating the rotary adjustment head can drive the slide rail locking piece to move downward to release the locking with the slide rail and move upward to lock with the slide rail. Two or more seat leg mounting holes are arranged on the outer shell.

9. A novel unlocking mechanism with a function of adjusting the seat back and forth according to claim 8, characterized in that: A pull wire joint is installed in the upper mounting hole of the rotary adjustment head.

10. A novel unlocking mechanism with a function of adjusting the seat back and forth according to claim 7, characterized in that: Two slide rails are arranged in parallel. The first locking block assembly and the second locking block assembly are both slid on each slide rail. The pull wire joints on all the first locking block assemblies and the second locking block assemblies are connected to the main pull wire on the unlocking handle through branch pull wires. Operating the unlocking handle can lock or unlock all the first locking block assemblies and the second locking block assemblies simultaneously.

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