Seat backrest adjusting mechanism
Through the adjustment components controlled by the fixed gear and locking teeth, the adjustment components of the torsion spring and pull wire terminals in the prior art are solved, and the problems of large weight, small angle and cushion movement of the aircraft seat back adjustment mechanism in the prior art are achieved, achieving a larger angle adjustment and a more comfortable riding experience.
Patent Information
- Application Number
- CN202423312199.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The existing aircraft seat back adjustment mechanism relies on the gas spring to telescope, resulting in increased weight, small adjustment angle and poor usage experience, and will drive the cushion to move forward during adjustment.
Fixed gears and locking teeth are used as angle adjustment main parts, and the meshing of locking teeth and fixed gear is controlled by combining the torsion spring and the pull-wire terminal. The backrest angle adjustment is realized through the adjustment component, and the traditional gas spring adjustment method is abandoned.
The backrest adjustment angle range is achieved, the structure is compact, the weight is lighter, and it will not drive the seat cushion to move, and the riding experience is more comfortable, meeting the strength requirements of the aircraft seat.
Smart Images
Figure CN223200285U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of seats, and in particular relates to a seat back adjustment mechanism. Background Art
[0002] The current aircraft seat back adjustment mechanism mainly relies on the expansion and contraction of gas springs to drive the backrest to rotate around the backrest rotation axis, which adds a lot of weight to the seat. The adjustment angle is small and the seat cushion moves forward during adjustment, making the backrest adjustment mechanism less than a good user experience. Summary of the Invention
[0003] The purpose of the utility model is to provide a seat back adjustment mechanism with a simple structure, high strength, good working stability and more comfortable use experience.
[0004] The purpose of this utility model is to solve:
[0005] A seat back adjustment mechanism includes a seat cushion base and a backrest base hinged on the seat cushion base through a first hinge shaft, a fixed gear is coaxially installed on the seat cushion base between the seat cushion base and the backrest base with the first hinge shaft, a locking tooth that meshes with the fixed gear is hinged on the backrest base on the upper side of the fixed gear through a second hinge shaft, an adjustment component that drives the locking tooth to engage and disengage with the fixed gear is provided above the locking tooth, and the inner end of the first torsion spring mounted on the first hinge shaft is fixed on the first hinge shaft, and the outer end is fixed on the second hinge shaft.
[0006] As a further optimization of the above technical solution, the fixed gear is positioned and installed on the seat cushion base through a screw on the outer side of the first hinge shaft.
[0007] As a further optimization of the above technical solution, the fixed gear is a sector gear.
[0008] As a further optimization of the above technical solution, an arc-shaped hole with the first hinge axis as the center is provided on the fixed gear, and a limiting column is fixed on the backrest base and inserted into the arc-shaped hole to limit the front and rear adjustment angle of the backrest base.
[0009] As a further optimization of the above technical solution, more than two through holes for installing the cushion are provided on the cross beam of the cushion base, and three countersunk holes arranged in a triangle on the upper rear side of the cushion base, one of the countersunk holes is used to install the first hinge shaft and the fixed gear, and the other two countersunk holes are used to fix the fixed gear.
[0010] As a further optimization of the above technical solution, two through holes for installing the backrest square tube are provided above the backrest base.
[0011] As a further optimization of the above technical solution, a rotating arm is hinged above the locking tooth through a third hinge shaft, and the cantilever portion of the rotating arm is inserted into the pull groove above the locking tooth. A third torsion spring is mounted on the third hinge shaft, and the third torsion spring always applies force to the rotating arm so that it moves in the direction of engagement between the locking tooth and the fixed gear. The action of the pull wire terminal of the adjustment component can drive the rotating arm to rotate and thereby drive the locking tooth to disengage from the fixed gear and unlock it.
[0012] As a further optimization of the above technical solution, the adjustment assembly includes an adjustment handle or adjustment button installed on the armrest, a pull wire terminal and a rotating arm, one end of the pull wire terminal is fixed on the adjustment handle or adjustment button, and the other end is fixed to the middle of the rotating arm. The adjustment handle or adjustment button is toggled, and the rotating arm is driven to rotate through the pull wire terminal, thereby driving the locking tooth to disengage from the fixed gear and unlock it. The angle of the backrest base can be adjusted by rotating the backrest base. The adjustment handle or adjustment button is released, and under the action of the third torsion spring installed on the rotating arm, the locking tooth is engaged with the fixed gear to lock the adjusted angle.
[0013] As a further optimization of the above technical solution, the seat cushion base, backrest base, first hinge shaft, fixed gear, second hinge shaft, locking tooth, and first torsion spring are symmetrically installed in two sets. The two seat cushion bases are connected by seat cushion square tubes to install the seat cushion, and the two backrest bases are connected by backrest square tubes to install the backrest and rotate synchronously when the backrest angle is adjusted.
[0014] As a further optimization of the above technical solution, the other end of the pull wire terminal connected to the adjustment handle or adjustment button on the armrest is connected to one end of the branch joint, and the other end of the branch joint is connected to two pull wire terminals, and the two pull wire terminals are respectively fixedly connected to the middle of the rotating arms on both sides.
[0015] The outstanding advantages of the utility model compared with the prior art are:
[0016] 1. The utility model only uses a fixed gear and a locking tooth as the main parts for adjusting the angle, so the thickness can be made larger and the strength is high, which can meet the strength requirements of the aircraft seat when it encounters impact.
[0017] 2. The utility model adopts three torsion springs as the original reset element, which occupies a small space, makes the structure compact, and is easy to install and use on the vehicle seat.
[0018] 3. The utility model adopts a pull wire terminal to control the unlocking or locking of the locking teeth and the fixed gear on both sides, which has a simple structure and is easy to install on the seat.
[0019] 4. This utility model abandons the traditional gas spring adjustment method and adopts gear adjustment as the adjustment method, which makes the backrest adjustment angle range larger and does not cause the seat cushion to move, making the riding experience more comfortable.
[0020] 5. The structure of this utility model is more integrated, the parts are smaller in size and weight, which better meets the weight requirements of airlines. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a three-dimensional schematic diagram of the present utility model.
[0022] Figure 2 It is an exploded view of the present utility model.
[0023] Figure 3 yes Figure 2 Magnified view of part A.
[0024] Figure 4 It is an exploded view of the local structure of the utility model. DETAILED DESCRIPTION
[0025] The present invention will be further described below with reference to the accompanying drawings. Figure 1-Figure 4 :
[0026] A seat back adjustment mechanism includes a seat cushion base 16 and a backrest base 15 hinged on the seat cushion base 16 through a first hinge shaft 21, a fixed gear 22 is coaxially mounted on the seat cushion base 16 between the seat cushion base 16 and the backrest base 15 and the first hinge shaft 21, a locking tooth 24 that meshes with the fixed gear 22 is hinged on the backrest base 15 on the upper side of the fixed gear 22 through a second hinge shaft 23, an adjustment component 13 that drives the locking tooth 24 to engage or disengage with the fixed gear 22 is provided above the locking tooth 24, the inner end 34 of the first torsion spring 17 mounted on the first hinge shaft 21 is fixed on the first hinge shaft 21, and the outer end 33 is fixed on the second hinge shaft 23.
[0027] As a further optimization of the above technical solution, the fixed gear 22 is positioned and installed on the seat cushion base 16 through two screws 30 outside the first hinge shaft 21 .
[0028] As a further optimization of the above technical solution, the fixed gear 22 is a sector gear.
[0029] As a further optimization of the above technical solution, the fixed gear 22 is provided with an arc hole 19 with the first hinge shaft 21 as the center, and the backrest base 15 is fixed with a limit column 20 inserted into the arc hole 19 to limit the front and rear adjustment angle of the backrest base 15.
[0030] The second hinge shaft 23 is sleeved with a second torsion spring, which always applies force to the locking tooth 24 in a direction of meshing with the fixed gear 22 .
[0031] As a further optimization of the above technical solution, more than two through holes 18 for installing the cushion are provided on the cross beam of the cushion base 16, and three countersunk holes arranged in a triangle on the upper rear side of the cushion base 16, one of the countersunk holes 32 is used to install the first hinge shaft 21 and the fixed gear 22, and the other two countersunk holes 31 are used to fix the fixed gear 22.
[0032] As a further optimization of the above technical solution, two through holes 29 for installing the backrest square tube are provided above the backrest base 15 .
[0033] As a further optimization of the above technical solution, a rotating arm 26 is hinged above the locking tooth 24 through a third hinge shaft 27, and the cantilever portion of the rotating arm 26 is inserted into the shifting slot 25 above the locking tooth 24. A third torsion spring 28 is mounted on the third hinge shaft 27. The third torsion spring 28 always applies force to the rotating arm 26 to move it toward the direction of engagement between the locking tooth 24 and the fixed gear 22. The action of the pull wire terminal 12 of the adjusting component 13 can drive the rotating arm 26 to rotate and thereby drive the locking tooth 24 to disengage from the fixed gear 22 and unlock it.
[0034] As a further optimization of the above technical solution, the adjustment component 13 includes an adjustment handle or adjustment button 10 installed on the armrest 11, a pull-wire terminal 12 and a rotating arm 26, one end of the pull-wire terminal 12 is fixed on the adjustment handle or adjustment button 10, and the other end is fixed to the middle of the rotating arm 26; the adjustment handle or adjustment button 10 is turned, and the rotating arm 26 is driven to rotate through the pull-wire terminal 12, thereby driving the locking tooth 24 to disengage from the fixed gear 22 and unlock it, and the angle of the backrest base 15 can be adjusted by rotating the backrest base 15; the adjustment handle or adjustment button is released, and under the action of the third torsion spring 28 installed on the rotating arm 26, the locking tooth 24 is engaged with the fixed gear 22 to lock the adjusted angle.
[0035] As a further optimization of the above technical solution, the seat cushion base 16, the backrest base 15, the first hinge shaft 21, the fixed gear 22, the second hinge shaft 23, the locking tooth 24, and the first torsion spring 17 are symmetrically installed in two sets. The two seat cushion bases 16 are connected by the seat cushion square tube to install the seat cushion, and the two backrest bases 15 are connected by the backrest square tube to install the backrest and rotate synchronously when the backrest angle is adjusted.
[0036] As a further optimization of the above technical solution, the other end of the pull wire terminal 12 connected to the adjustment handle or adjustment button 10 on the armrest is connected to one end of the branch joint 14, and the other end of the branch joint 14 is connected to two pull wire terminals 12, and the two pull wire terminals 12 are respectively fixedly connected to the middle of the rotating arms 26 on both sides.
[0037] 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 back adjustment mechanism comprising a seat cushion base and a backrest base hinged to the seat cushion base via a first hinge shaft, characterized in that: A fixed gear is installed coaxially with the first hinge shaft on the seat cushion base between the seat cushion base and the backrest base, and a locking tooth that meshes with the fixed gear is hinged on the backrest base on the upper side of the fixed gear through the second hinge shaft. An adjustment component that drives the locking tooth to engage or disengage from the fixed gear is provided above the locking tooth. The inner end of the first torsion spring mounted on the first hinge shaft is fixed on the first hinge shaft, and the outer end is fixed on the second hinge shaft.
2. The seat back adjustment mechanism according to claim 1, characterized in that: The fixed gear is positioned and installed on the seat cushion base through a screw rod outside the first hinge shaft.
3. The seat back adjustment mechanism according to claim 1, characterized in that: The fixed gear is a sector gear.
4. The seat back adjustment mechanism according to claim 1, characterized in that: The fixed gear is provided with an arc-shaped hole with the first hinge shaft as the center, and the backrest base is fixed with a limiting column inserted into the arc-shaped hole to limit the front and rear adjustment angle of the backrest base.
5. The seat back adjustment mechanism according to claim 1, characterized in that: The crossbeam of the seat cushion base is provided with more than two through holes for installing the seat cushion, and the upper rear side of the seat cushion base has three countersunk holes arranged in a triangle, one of which is used to install the first hinge shaft and the fixed gear, and the other two countersunk holes are used to fix the fixed gear.
6. The seat back adjustment mechanism according to claim 1, characterized in that: Two through holes for installing the backrest square tube are arranged above the backrest base.
7. A seat back adjustment mechanism according to any one of claims 1 to 6, characterized in that: A rotating arm is hinged above the locking tooth through a third hinge shaft, and the cantilever portion of the rotating arm is inserted into the shifting groove above the locking tooth. A third torsion spring is mounted on the third hinge shaft. The third torsion spring always applies force to the rotating arm so that it moves in the direction of engagement between the locking tooth and the fixed gear. The action of the pull wire terminal of the adjusting component can drive the rotating arm to rotate and thereby drive the locking tooth to disengage from the fixed gear and unlock it.
8. The seat back adjustment mechanism according to claim 7, characterized in that: The adjustment assembly includes an adjustment handle or adjustment button installed on the armrest, a pull wire terminal and a rotating arm. One end of the pull wire terminal is fixed on the adjustment handle or adjustment button, and the other end is fixed on the middle of the rotating arm. The adjustment handle or adjustment button is toggled, and the rotating arm is driven to rotate through the pull wire terminal, thereby driving the locking tooth to disengage from the fixed gear and unlock it. The angle of the backrest base can be adjusted by rotating the backrest base. The adjustment handle or adjustment button is released, and under the action of the third torsion spring installed on the rotating arm, the locking tooth is engaged with the fixed gear to lock the adjusted angle.
9. The seat back adjustment mechanism according to claim 8, characterized in that: The seat cushion base, backrest base, first hinge shaft, fixed gear, second hinge shaft, locking tooth and first torsion spring are symmetrically installed in two sets. The two seat cushion bases are connected by seat cushion square tubes to install the seat cushion, and the two backrest bases are connected by backrest square tubes to install the backrest and rotate synchronously when the backrest angle is adjusted.
10. The seat back adjustment mechanism according to claim 9, characterized in that: The other end of the pull wire terminal connected to the adjustment handle or adjustment button on the armrest is connected to one end of the branch joint, and the other end of the branch joint is connected to two pull wire terminals, and the two pull wire terminals are respectively fixedly connected to the middle of the rotating arms on both sides.